• 专利附录
  • 专利说明
  • 权利要求
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    • 专利摘要:
    The present application relates to a method for dedusting and cooling of converter gas and to an apparatus for carrying out the method. In the method for dedusting converter gas, converter gas generated in steelmaking is first subjected to indirect cooling in a first cooling device, preferably with steam and / or hot water production, then subjected to further cooling in a second cooling device, and then by filtering in a dedusting device The converter gas exits the first cooling device in which it was subjected to indirect cooling, preferably with steam and / or hot water production, at a temperature which is <1100 ° C, preferably <950 ° C is more preferably <750 ° C, and> 350 ° C, preferably> 400 ° C, more preferably ≤ 450 ° C, most preferably ≥ 500 ° C. In the second cooling device is dry or quasi-dry cooling, preferably to a temperature <280 ° C, more preferably to a temperature <250 ° C, most preferably to a temperature <200 ° C instead.
    公开号:AT511430A4
    申请号:T1073/2011
    申请日:2011-07-21
    公开日:2012-12-15
    发明作者:Alexander Dr Fleischanderl；Robert Neuhold；Tobias Plattner
    申请人:Siemens Vai Metals Tech Gmbh；
    IPC主号:
    专利说明:

    201115945
    Description Name of the invention
    Method and device for dedusting and cooling of
    converter gas
    Field of engineering
    The present application relates to a method for dedusting and cooling of converter gas and to an apparatus for carrying out the method.
    State of the art
    When raw iron is oxygenated, the accompanying elements of the pig iron are oxidized by the oxygen and separated from the iron. While the oxides of Si, Mn and P are removed from the steel bath in the form of slag, carbon escapes in gaseous form as carbon monoxide CO from the steel bath. The resulting from the fresh carbon monoxide fraction in the so-called converter gas, which escapes from the converter containing the steel bath, gives the converter gas a large amount of energy. By chemical conversion into carbon dioxide C02 this energy content can be obtained later, for example by combustion of the CO or by reduction of metal oxides by means of CO. For this purpose it is known to collect the converter gas and store. For this purpose, the converter gas is subjected to dedusting - for example, electrostatically - and cooling. Typically, the inlet temperature of the dedusted and after dedusting again cooled converter gas when entering a storage device 50-70 ° C. By cooling the converter gas, a larger amount of converter gas can be stored in a given volume of a storage device than in uncooled introduction of the converter gas into the storage device.
    In today's standard wet dedusting for the converter gas is the converter gas, which in indirect cooling chimney to produce later 201115945 2:
    Steam or hot water was cooled to a temperature of about 900 ° C, subjected to a multi-stage wet dedusting for coarse and Feinstaubentfemung. The cooled and dedusted converter gas thus obtained is, if appropriate after further cooling in a gas cooler, often introduced into a gas storage device, with a dust content after the wet scrubber of usually 20-30 mg / Nm 3 being realized. The water used in wet dedusting must also be subjected to an elaborate treatment. In addition, high operating costs, because water losses are compensated and incurred wastewater must be elaborately aftertreated. Another factor contributing to high operating costs is the high power requirement of the pump system necessary for the circulation of the water, the high proportion of energy used to overcome the pressure drop in the purification stage, and the high space and investment requirements resulting from the parts of the system required for the water supply and after-treatment ,
    In dry or quasi-dry dedusting systems used today as standard, the converter gas, which was cooled indirectly in the chimney to produce steam or hot water to a temperature of about 900 ° C, is subjected to evaporative cooling to reduce the temperature to about 300-200 ° C., and then into electrostatic precipitators to be dedusted. The resulting cooled and dedusted converter gas is often introduced after further cooling in a gas cooler, usually a quench, in a gas storage device, with a dust content of usually 10-20 mg / Nm3 is realized by electrostatic precipitator. Even when using a gas cooler, especially a quench, a water treatment for accumulating wastewater must be provided.
    Due to environmental requirements and technical requirements of plants in which the converter gas is used, the lowest possible dust content of the converter gas is sought.
    REPLACED 201115945
    Summary of the Invention Technical Problem
    It is the object of the present invention to provide a method and an apparatus by which the disadvantages of the prior art are reduced or avoided, and a dust content of the dedusted converter gas of &lt; 5 mg / Nm3 is achieved.
    Technical solution
    This object is achieved by a method for dedusting and cooling converter gas, wherein in the steel production resulting converter gas is first subjected in a first cooling device indirect cooling, preferably under steam and / or hot water production, then subjected to further cooling in a second cooling device , then dedusted in a dedusting device.
    The process according to the invention is characterized in that the converter gas leaves the first cooling device in which it has been subjected to indirect cooling, preferably under steam and / or hot water production, at a temperature which is 1100 ° C., preferably &lt; 950 ° C, more preferably £ 750eC, and which is ≥ 350 ° C, preferably z is 400 ° C, more preferably ≤ 450 ° C, most preferably ≥ 500 ° C, and dry or quasi-dry cooling in the second cooling device is preferred to a temperature of 280 ° C, more preferably to a temperature &lt; 250 ° C, most preferably takes place at a temperature s 200 ° C, and in the dedusting device by means of filtering to a dust content of &lt; 5 mg / Nm3 is dedusted.
    | FOLLOWED v · 201115945
    The converter gas accumulates when refining pig iron batches for steel production in a converter. The converter may be, for example, an AOD converter for producing stainless steel, or an LD converter for performing an LD method with inflation of oxygen, or a bottom-blowing converter, or a combined bottom and on-up converter. AOD stands for Argon Oxygen Decarburization. LD stands for the Linz-Donawitz process.
    The indirect cooling takes place with energy transfer, preferably with steam or hot water production, in a first cooling device. This can be performed at least partly as a cooling chimney. The term "cooling chimney" is understood to mean a gas channel consisting of tube segments, on the inner surface of which a heat exchange takes place between the converter gas and a cooling medium guided in tubes. By extending a conventional cooling chimney, converter gas is more strongly cooled until it leaves the chimney using the heat of the converter gas.
    To increase the efficiency of cooling, additional exchange surfaces, for example so-called bulkheads, can also be installed inside the gas channel.
    Steam is generated by pumping water under high pressure through the cooling medium - preferably water - leading tubes. In the removal of the heat energy of the converter gas steam is formed, which is collected in a steam drum and is available for further use in the steelworks. Through the use of thermal buffers, it is subsequently possible, for example, to use the steam for continuous power generation. The purpose of steam generation is to recover the energy available for alternative use in the hot converter gas - which leaves the converter at temperatures of up to 2000 ° C. In addition to or instead of steam generation can be withdrawn from the converter gas in the first cooling device in another way, energy by indirect cooling, for example by means of hot water.
    REPLACED 201115945
    Steam generation or hot water production makes economic sense only at a gas temperature of 350 ° C or higher, because at lower temperatures for the required heat transfer ever larger heat exchanger surfaces must be present, on the one hand in the purchase high costs and space problems with it, but also in operation Higher energy costs - such as higher pressure drop - have a negative economic impact.
    In principle, steam generation or hot water production could be carried out even at temperatures below 350 ° C, but such a process is not economically acceptable for the reasons mentioned above.
    The energy transfer in the indirect cooling in the first cooling device can of course be carried out instead of water or steam with other media, such as molten salts or organic liquids.
    After the indirect cooling of the converter gas in the first cooling device, which is preferably carried out with steam generation or hot water generation, to a temperature &lt; 1100 ° C, preferably 9 950 ° C, more preferably 750 750 ° C, and 350 350 ° C, preferably 400 400 ° C, more preferably g. 450 ° C, most preferably &gt; 500 ° C, the converter gas is subjected to further cooling in a second cooling device, and then in a dedusting device by means of filtering to a dust content of &lt; Dedusted 5 mg / Nm3. According to the invention, dry or quasi-dry cooling takes place in the second cooling device.
    For the purposes of this application, dry cooling means cooling in which the moisture content of the converter gas to be dedusted is not increased by supplying moisture into the converter gas. This is the case for example with indirect cooling by means of a heat exchanger, for example gas-liquid with a cooling liquid or gas-gas with a cooling gas.
    FOLLOW-UP • · • ·
    201115945
    Under quasi-dry cooling is to be understood in the context of this application, a dedusting, in which the moisture content of the dedusting converter gas is increased by supplying moisture into the converter gas, while little or no wastewater, which came into direct contact with the cooled gas stream during cooling is, accumulates. Low wastewater is to be understood as meaning that less than 20%, preferably less than 10%, more preferably less than 5%, of a quantity of water introduced for cooling into a flow of converter gas is produced as waste water. In such small amounts of wastewater wastewater treatment can be operated with little effort or to dispense with a wastewater treatment.
    The dry or quasi-dry cooling in the second cooling device is preferably carried out at a temperature of 280 ° C, more preferably at a temperature of 250 ° C, most preferably at a temperature &lt; 200 ° C. By means of filtering, the dust content of &lt; Dedusted 5 mg / Nm3.
    Filters with a dust content of &lt; 5 mg / Nm3 dust, are for example fabric filter, ceramic filter or steel filter. Tissue filters are understood to mean filter systems which consist of a fabric material but can take on a wide variety of forms such as, for example, cartridges, tubes, bags, cassettes. Of course, a gas to be dedusted must have a temperature that is below the temperature at which the material of the fabric filters begins to thermally decompose. Tissue filters may, for example, consist of commercially available filter materials having a durability for a permanent operating temperature of 200 ° C, for example polyamide P84, MetaAramid, glass fiber, PTFE, carbon fiber or equivalent. However, the upper limit of resistance for use of such materials is at peak temperatures of about 280 ° C. Therefore, in order to enable safe use, in many filter materials, the temperature of the converter gas does not need to be more than 280 ° C, preferably &lt; 200 ° C. When the converter gas has the first cooling device in which it was subjected to indirect cooling, preferably under steam or hot water production, with a temperature &lt; 1100 ° C, preferably £ 950 ° C, more preferably &lt; 750 ° C leaves, it is possible with reasonable economic effort, by means of
    FOLLOW-UP • · * * · · · · · * * 201115945 dry or quasi-dry cooling to cool the converter gas to a temperature at which use of fabric filters, especially fabric filters made of filter materials, for which the temperature of the converter gas does not exceed 280 for safe use ° C, preferably £ 200 ° C should be dedusting is possible.
    Although at higher temperatures &gt; 280 ° C heat-resistant filters made of special materials such as ceramic or steel - called ceramic filter, steel filter insert - the filter can fulfill its filter function even at temperatures of up to 500 ° C or above. Despite further cooling of the converter gas in the second cooling device, temperatures of up to> 500 ° C. can occur on the filters themselves, thus possibly leading to destruction of the filter material. This may occur, for example, when pyrophoric dust deposited on the filter material, such as metallic iron, reacts with oxygen in the exhaust gas and is oxidized. Such oxidation is highly exothermic and can result in temperatures> 500 ° C. Oxygen in the exhaust gas may occur in periods of operation of a converter in which no refining is performed, for example during charging or tapping.
    Overall, the inventive method in its embodiments over the prior art, for example, the advantages - improved utilization of the heat of the converter gas by indirect cooling of the converter gas in the first cooling device, preferably with steam or hot water production, to a temperature of 750 ° C, caloric higher quality Converter gas due to lower humidity - avoiding wet gas cooling, a converter gas can be obtained with up to 40% higher energy content, as a key figure here is the lower calorific value Hu, ranging from about 4.5 MJ / kg in a wet gas cooling up to 6.5 MJ / kg increased in the process according to the invention -
    Dust content &lt; 5 mg / Nm3 - no or extremely reduced water requirement compared to wet gas cooling. REPLACED |
    201115945
    Advantageous Effects of the Invention
    Optionally, after dedusting in the dedusting device in a third cooling device, depending on the required gas temperature, dry, quasi-dry or wet cooled. This is done, for example, when the converter gas is to be introduced into a gas storage device. In order to carry out a storage of the dedusted converter gas economically useful if necessary, the dedusted converter gas is then cooled in a third cooling device, preferably at a temperature ^ 70 ° C.
    Because the cooling is dry or quasi-dry according to the invention, processing of wastewater coming into direct contact with the converter gas to be cooled can also be completely avoided at this point or carried out with little effort
    According to an advantageous embodiment of the invention, the dry cooling takes place in the second cooling device and / or the third cooling device by indirect heat exchange. In indirect heat exchange, a gaseous or liquid cooling medium is kept spatially separated from the converter gas. Mixing of the cooling medium with the converter gas therefore can not take place. Accordingly, the cooling medium is not contaminated by contact with converter gas and accordingly does not have to be laboriously cleaned or disposed of. The moisture of the converter gas is not increased as a result of supply of moisture by contact between the cooling medium and the converter gas.
    According to a preferred embodiment of the invention, the indirect heat exchange takes place in the second cooling device and / or the third cooling device by indirect gas-gas heat exchange. For example, the converter gas can be cooled by means of gas-gas heat exchange when cooling gas, for example ambient air, is guided by means of blowers via converter gas-carrying lines. The lines carrying the converter gas are preferably designed in the region in which cooling air is passed over them so that they have the largest possible surface-to-volume ratio. In this way, it is possible to cool particularly efficiently. The material of the lines is preferably at least in the area in which
    REPLACED 201115945 • ♦ w m • «* * * 4 k« · Cooling air is passed over them, a metallic material. Steel is particularly preferred, since steel is easy to process, cost-effective and sufficiently heat-conductive for the purpose. For example, the converter gas lines leading in the area in which converter gas is passed over it, designed as a plate-shaped hollow body, introduced into the converter gas and can be discharged from which converter gas.
    The lines leading the converter gas can also be formed as tubes in the region in which converter gas is passed over them, can be introduced into the converter gas and from which converter gas can be discharged. The cooling by gas-gas heat exchange can also be done without a fan. In this case, ambient air cooled by the lines leading between the converter gas is cooled.
    In principle, it is also possible, depending on the measured temperature of the cooled dedusted converter gas and selected thresholds for the temperature of the cooled but not yet dedusted, or switched on the cooled and dedusted converter gas on or off, so that cooling either through the dedusted converter gas leading Lines blown cooling air is done, or cooling by the leading between the converter gas lines existing ambient air.
    According to another embodiment of the invention, the indirect heat exchange takes place in the second cooling device and / or the third cooling device by gas-liquid heat exchange with closed cooling circuit. For example, a liquid cooling medium in pipelines can be guided in a closed circuit, and the converter gas can flow around the pipelines. The liquid cooling medium may be, for example, water, or ammonia, or a mixture of ammonia and water. A mixing of the liquid cooling medium with the converter gas can not take place. Accordingly, the liquid cooling medium is not contaminated by contact with converter gas and accordingly does not have to be laboriously cleaned or disposed of. A preparation of the liquid cooling medium, for example, a water treatment, is accordingly not necessary in such process management.
    REPLACED «I ··« I ·· 10 201115945
    In the closed cooling circuit also re-cooling of heated liquid cooling medium takes place.
    According to a weathered embodiment of the invention, the indirect heat exchange takes place in the second cooling device and / or the third cooling device by a combination of indirect gas-gas heat exchange and gas-liquid heat exchange, for example first gas-gas heat exchange and then further cooling gas-liquid heat exchange.
    According to one embodiment of the invention, the quasi-dry cooling takes place in the second cooling device and / or the third cooling device by an evaporative cooling process.
    In this case, a liquid cooling medium, for example water, injected into the gas stream of the converter gas. The droplet diameter d90 - d90 indicates that 90% of the droplets have a droplet diameter corresponding to a following size specification - the dosed liquid cooling medium is d90 &lt; 1000 microns, preferably &lt; 300 microns. To produce such fine droplets, for example, 2-fluid nozzles are used, which are operated, for example, with nitrogen, or high-pressure nozzles, for example, return nozzles used.
    Conventionally used gas scrubbers acting as gas scrubbers have a droplet spectrum in which the droplet diameter d90 is greater than 1000 microns and operate at high L / G of about 2-5. L / G stands for the ratio of liters of cooling medium to cubic meters of gas to be cooled. In such an operation, a proportion of the cooling medium is evaporated - it evaporates - while the majority does not evaporate, but only heated. Evaporation and evaporation in this context are different terms for the same process. Since the heat of evaporation does not use the heat of evaporation to cool the gas stream from converter gas, the addition of more cooling medium will be necessary for a given cooling than if all or most of the cooling medium is evaporated. Accordingly, large amounts of recirculating water are required in conventionally used gas scrubbers as gas scrubbers.
    REPLACED 11 201115945
    In the method according to the invention is characterized in that the liquid cooling medium is introduced as a mist of fine drops, the - resulting in cooling the converter gas - evaporation of the cooling medium compared to conventional wet-working, acting as gas scrubbers gas coolers facilitated. This makes it possible to achieve a given cooling without an enormous excess of water with L / G of 2-5, which is necessary in conventional processes, but with a L / G substantially less than 1, preferably less than 0.5, particularly preferably less than 0.1, for example Range 0.05, reach. Since in the process according to the invention the injected liquid cooling medium, water, practically completely evaporates, no or little wastewater, which has come into direct contact with the gas stream to be cooled during cooling, falls in accordance with the invention in an evaporative cooling process.
    Low wastewater is to be understood as meaning that less than 20%, preferably less than 10%, more preferably less than 5%, of a quantity of water introduced for cooling into a flow of converter gas is produced as waste water.
    In this context, the term wastewater is also to be understood as meaning liquid cooling medium which has come into direct contact with the gas stream to be cooled during cooling, and therefore has to be treated.
    A further subject matter of the invention is a device for carrying out a method according to the invention, having a first cooling device for indirect cooling of converter gas, a second cooling device for cooling the converter gas emerging from the first cooling device, and a dedusting device for dedusting the converter gas exiting from the second cooling device, characterized in that the second cooling device is a cooling device for dry or quasi-dry cooling, and the dedusting device is equipped with filters.
    REPLACED 201115945 12 «*
    The dedusting device is preferably designed to ensure explosion-proof, explosion-proof and explosion-proof measures, such as with pressure relief flaps.
    Preferably, the first cooling device for indirect cooling of converter gas is a cooling device for indirect cooling of converter gas with steam generation, or a cooling device for indirect cooling of converter gas with hot water production, or a cooling device for indirect cooling of converter gas under steam and hot water production, or a cooling device for indirect Cooling of converter gas under steam or hot water production.
    According to one embodiment, the device comprises filters which are designed as fabric filters.
    In this case, it is preferred that the material of the fabric filter comprises a material from the group - polyamide P84, - meta aramid, - glass fiber, - PTFE, - carbon fiber - metal fabric.
    The material of the fabric filter can also consist of a material from this group.
    According to another embodiment, the filters comprise ceramic filters and / or metal filters. The filters may also be ceramic filters and / or metal filters.
    According to one embodiment, the device also comprises a third cooling device for cooling the converter gas leaving the dedusting device, wherein the third cooling device comprises a cooling device for dry, quasi-dry or wet cooling.
    POSSIBLE REVENUE 201115945 13 • »* * * ·« «*» »· · • ♦ * m * ♦ ♦
    According to one embodiment of the device according to the invention, in the second cooling device and / or the third cooling device, the cooling device for dry cooling comprises a device for indirect heat exchange. The cooling device for dry cooling may also be a device for indirect heat exchange.
    According to one embodiment of the device according to the invention, the device for indirect heat exchange comprises a device for carrying out an indirect gas-gas heat exchange. The device for indirect heat exchange may also be a device for carrying out an indirect gas-gas heat exchange.
    According to one embodiment of the device according to the invention, the device for indirect heat exchange comprises a device for carrying out an indirect gas-liquid heat exchange with closed cooling circuit, in the closed cooling circuit also re-cooling of heated liquid cooling medium takes place.
    The indirect heat exchange device may also be a device for carrying out a closed-loop indirect gas-liquid heat exchange.
    According to one embodiment of the device according to the invention, the device for indirect heat exchange comprises a device for carrying out an indirect gas-liquid heat exchange with closed cooling circuit and a device for carrying out an indirect gas-gas heat exchange.
    According to one embodiment of the device according to the invention, in the second cooling device and / or the third cooling device, the cooling device for quasi-dry cooling is a device for carrying out an evaporative cooling process.
    POSSIBLE · &gt; &gt; &gt; &gt; &gt; &gt; &gt; &gt;
    According to one embodiment of the device according to the invention, in the apparatus for carrying out an evaporative cooling process, nozzles for injecting a liquid cooling medium with droplet diameter d90 of the injected liquid cooling medium d90 &lt; 1000 micrometers available.
    Description of embodiments
    The invention will be explained with reference to exemplary schematic figures of embodiments.
    FIG. 1 shows schematically the treatment according to the invention of the converter gas.
    In FIG. 1, converter gas 1, represented by corrugated arrows, rises from a converter into a suction hood 2. Through the exhaust hood, the converter gas in the cooling chimney, which is a first cooling device for indirect cooling, in the case shown under steam generation, passed. The cooling chimney comprises the chimney parts 3a and 3b. Via pipes 4, steam, which is produced by heat exchange between the converter gas and the cooling medium, which is guided in the cooling chimney (not shown), is fed to a steam drum 5.
    In the cooling chimney, a first cooling step for the converter gas takes place by means of indirect cooling by water / steam. At the end of the cooling-fireplace section 3a, the converter gas has a temperature of approximately 900 ° C. and is further cooled in the cooling-fireplace section 3b to a temperature of approximately 400 ° C.
    After the converter gas exits the first cooling device, it enters a second cooling device 6. This is a cooling device for dry cooling, in the example shown by indirect gas-gas heat exchange. The cooling takes place in that the converter gas is passed through plates or tubular hollow bodies, via which cooling air is blown by means of fans 7. In the second cooling device, &lt; 200eC cooled.
    EIGHTED 15 201115945
    The converter gas leaving the second cooling device 6 is then directed into a dedusting device 8, in which it is conveyed by means of fabric filters 9 to a dust content of &lt; 5 mg / Nm3 is dedusted.
    Subsequently, the cooled and dedusted converter gas is discharged from the dedusting device. By means of a switching station 10, the cooled and dedusted converter gas can be sent to a flare chimney 11, where it is burned. It may alternatively be directed to a gas storage device 12.
    For example, the converter gas is then led to the flare chimney 11 when its CO concentration is below a threshold value necessary for an economically viable further use. This may be the case during periods of time such as bubble start or bubble end, or tapping periods on converter 1. As the CO concentration increases above the threshold, the converter gas is supplied to the gas storage device 12 by switching the switching station 10.
    In the flow direction of the converter gas in front of the gas storage device 12, the cooled and dedusted converter gas is subjected to dry cooling in a third cooling device 13. This is a cooling device for dry cooling, in the example shown by indirect gas-gas heat exchange. The cooling takes place -as in the second cooling device 6 -thereby that the converter gas is passed through plate-shaped hollow body, through which blowers 14 cooling air is blown.
    Although the invention has been further illustrated and described in detail by the preferred embodiments, the invention is not limited by the disclosed examples, and other variations can be derived therefrom by those skilled in the art without departing from the scope of the invention.
    REFERENCE 16 201115945 LIST OF REFERENCES 1 converter 2 suction hood 3a, 3b cooling chimney parts 4 pipe 5 steam drum 6 second cooling device 7 blower 8 dedusting device 9 fabric filter 10 switching station 11 torch chimney 12 gas storage device 13 third cooling device 14 blower
    SUBSEQUENT
    权利要求:
    Claims (17)
    [1]
    * 201115945 17



    Claims 1. Method for dedusting and cooling converter gas, wherein converter gas obtained in steelmaking is first subjected to indirect cooling in a first cooling device, preferably under steam and / or hot water production, then subjected to further cooling in a second cooling device, then into a dedusting device is dedusted, characterized in that the converter gas leaves the first cooling device in which it was subjected to indirect cooling, preferably under steam and / or hot water production, with a temperature which is &lt; 1100eC, preferably £ 950eC, more preferably £ 750eC, and which is about 350 ° C, preferably about 400 ° C, more preferably £ 450 ° C, most preferably £ 500 ° C, and in the second Cooling device dry or quasi-dry cooling, preferably at a temperature of 280 ° C, more preferably at a temperature of 250 ° C, most preferably at a temperature &lt; 200 ° C, and in the dedusting device by means of filtering to a dust content of &lt; 5 mg / Nm1 dedusted.
    [2]
    2. The method according to claim 1, characterized in that after dedusting in the dedusting the converter gas in a third cooling device dry .quasitrocken or wet cooled. FROZEN 1 Method according to claim 1 or 2, characterized in that the dry cooling takes place in the second cooling device and / or the third cooling device by indirect heat exchange. • · • · «« 18 201115945
    [3]
    4. The method according to claim 3, characterized in that the indirect heat exchange takes place by indirect gas-gas heat exchange.
    [4]
    5. The method according to claim 3, characterized in that the indirect heat exchange takes place by gas-liquid heat exchange with a closed cooling circuit.
    [5]
    6. The method according to claim 3, characterized in that the indirect heat exchange takes place by a combination of indirect gas-gas heat exchange and gas-liquid heat exchange.
    [6]
    7. The method according to claim 1 or 2, characterized in that the quasi-dry cooling takes place in the second cooling device and / or the third cooling device by an evaporative cooling process.
    [7]
    8. Apparatus for carrying out a method according to one of claims 1 to 7, comprising a first cooling device for indirect cooling of converter gas, a second cooling device for cooling the converter gas exiting from the first cooling device, and a dedusting device for dedusting the converter gas exiting from the second cooling device , characterized in that the second cooling device is a cooling device for dry or quasi-dry cooling, and the dedusting device is equipped with filters.
    [8]
    9. Apparatus according to claim 8, characterized in that the filters comprise fabric filters.
    [9]
    10. The device according to claim 9, characterized in that the material of the fabric filter is a material from the group - Polyamide P84, I REPLACED k · 201115945 19 * .. **. · * ··· '* - Meta Aramid, - glass fiber, - PTFE, - Carbon fiber - Metal mesh.
    [10]
    11. The device according to claim 8, characterized in that the filters comprise ceramic filter or metal filter.
    [11]
    12. Device according to one of claims 8 to 11, characterized in that it also comprises a third cooling device for cooling the exiting from the dedusting converter gas, wherein the third cooling device comprises a cooling device for dry, quasi-dry or wet cooling.
    [12]
    13. Device according to one of claims 8 to 12, characterized in that in the second cooling device and / or the third cooling device, the cooling device for dry cooling is a device for indirect heat exchange.
    [13]
    14. The device according to claim 13, characterized in that the device for indirect heat exchange comprises a device for carrying out an indirect gas-gas heat exchange.
    [14]
    15. The apparatus according to claim 13, characterized in that the device for indirect heat exchange, a device comprises a device for carrying out an indirect gas-liquid heat exchange with closed cooling circuit.
    [15]
    16. Device according to one of claims 8 to 12, characterized in that in the second cooling device and / or the third cooling device, the cooling device for quasi-dry cooling comprises a device for carrying out an evaporative cooling process. | REPLACED 201115945 Figure 1

    Claims 1. A method for dedusting and cooling converter gas, wherein converter gas generated in steelmaking first in a first cooling device, indirect cooling by heat exchange between the converter gas and a liquid cooling medium, preferably Water, preferably under steam and / or hot water production, is then subjected to further cooling in a second cooling device, then dedusted in a dedusting device, characterized in that the converter gas is the first cooling device in which there is indirect cooling by heat exchange between the converter gas and the liquid cooling medium, preferably water, preferably under steam and / or hot water production, leaves at a temperature which is &lt; 1100 ° C, preferably s 950 ° C, more preferably ^ 750 ° C, and the &gt; Is 350 ° C, preferably ≥ 400 ° C, more preferably ≥ 450 ° C, most preferably ≤ 500 ° C, and in the second cooling device dry or quasi-dry cooling, preferably to a temperature s 280 ° C, more preferably to a temperature &lt; 250 ° C, most preferably to a temperature &lt; 200 ° C, and in the dedusting device by means of filtering to a dust content of &lt; 5 mg / Nm1 2 dedusted. FROZEN 1 Method according to claim 1, characterized in that after dedusting 2 in the dedusting device, the converter gas in a third cooling device is dry, quasi-dry or wet cooled. • * • · • · · ···································· *. 3. A method according to claim 1 or 2, characterized in that the dry cooling in the second cooling device and / or the third cooling device takes place by indirect heat exchange. 4. The method according to claim 3, characterized in that the indirect heat exchange takes place by indirect gas-gas heat exchange. 5. The method according to claim 3, characterized in that the indirect heat exchange takes place by gas-liquid heat exchange with a closed cooling circuit. 6. The method according to claim 3, characterized in that the indirect heat exchange takes place by a combination of indirect gas-gas heat exchange and gas-liquid heat exchange. 7. The method according to claim 1 or 2, characterized in that the quasi-dry cooling takes place in the second cooling device and / or the third cooling device by an evaporative cooling process. 8. An apparatus for carrying out a method according to one of claims 1 to 7, comprising a first cooling device for indirect cooling of converter gas by heat exchange between the converter gas and a liquid cooling medium, preferably water, a second cooling device for cooling the converter gas exiting from the first cooling device, and a dedusting device for dedusting the exiting converter gas from the second cooling device, characterized in that the second cooling device is a cooling device for dry or quasi-dry cooling, and the dedusting device is equipped with filters. REPLACED 201115945 1G ** ·· * *] y * · »·»! 9. Device according to claim 8, characterized in that the filters comprise fabric filters. 10. The device according to claim 9, characterized in that the material of the fabric filter comprises a material from the group - polyamide P84, - meta aramid, - glass fiber, - PTFE, - carbon fiber - metal fabric comprises. 11. The device according to claim 8, characterized in that the filters comprise ceramic filter or metal filter. 12. Device according to one of claims 8 to 11, characterized in that it also comprises a third cooling device for cooling the exiting from the dedusting converter gas, wherein the third cooling device comprises a cooling device for dry, quasi-dry or wet cooling. 13. Device according to one of claims 8 to 12, characterized in that in the second cooling device and / or the third cooling device, the cooling device for dry cooling is a device for indirect heat exchange. 14. The device according to claim 13, characterized in that the device for indirect heat exchange comprises a device for carrying out an indirect gas-gas heat exchange.
    [16]
    15. The device according to claim 13, characterized in that the device for indirect heat exchange, a device, a device FALLEN 201115945 20 • ·

    for carrying out an indirect gas-liquid heat exchange with closed cooling circuit.
    [17]
    16. Device according to one of claims 8 to 12, characterized in that in the second cooling device and / or the third cooling device, the cooling device for quasi-dry cooling comprises a device for carrying out an evaporative cooling process. SUBSEQUENT
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    法律状态:
    2016-06-15| PC| Change of the owner|Owner name: PRIMETALS TECHNOLOGIES AUSTRIA GMBH, AT Effective date: 20160415 |
    优先权:
    申请号 | 申请日 | 专利标题
    ATA1073/2011A|AT511430B1|2011-07-21|2011-07-21|METHOD AND DEVICE FOR DISCHARGING AND COOLING CONVERTERGAS|ATA1073/2011A| AT511430B1|2011-07-21|2011-07-21|METHOD AND DEVICE FOR DISCHARGING AND COOLING CONVERTERGAS|
    PCT/EP2012/064180| WO2013011089A1|2011-07-21|2012-07-19|Method and device for the dust removal and cooling of converter gas|
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