• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    In a process for obtaining in a continuous operation a specimen gas from a flowing gas current of a pressurized crude gas for analysis purposes, a branch current is withdrawn from the main current in an anisokinetic manner whereupon the branch current of the crude gas is passed through a cooling device and a specimen is then withdrawn from the branch current likewise in an anisokinetic manner and the specimen is subjected to pressure release and filtering prior to passing it into a gas analysis apparatus. The invention also comprises an apparatus for carrying out the above process comprising a passageway for the main crude gas, a branch for withdrawing in anisokinetic manner a partial current of crude gas from the main current, cooling means, duct means for passing said branch current through said cooling means, means for withdrawing a specimen from the branch current in an anisokinetic manner after passing through the cooling means and a pressure release valve and filter means provided in the duct for passing the specimen to a gas analysis device.
    公开号:SU1065719A1
    申请号:SU797770966
    申请日:1979-12-05
    公开日:1984-01-07
    发明作者:Оберлэндер Герхард；Мюллер Реинхард；Функе Вернер
    申请人:Феб Гаскомбинат Шварце Пумпе (Инопредприятие)；
    IPC主号:
    专利说明:

    The invention relates to a method and apparatus for continuously diverting a portion of a raw gas stream for use as a measurement gas for controlling a process or controlling a process. .
    During the production of gas, for example. during oxygen gasification under pressure, high-pressure, hot, steam-saturated crude gases are formed under high pressure. Such gases cannot be directly supplied to the necessary gas analysis devices, as well as to the high-frequency pressure-reducing valves connected to them, they must be adequately prepared for such purposes. This task serves, in accordance with the invention, a method, as well as installation, necessary for its realization. The invention can also be used for continuous sampling of gas wells, from which hot high-pressure natural gas, saturated with water vapor, containing solid particles and hydrocarbons condensing when cooled, is produced.
    In addition, the method according to the invention can be efficiently applied to other installations conducting a crude gas, especially in the chemical industry under similar sampling conditions.
    It is already known that the crude gas, the gas flow must be removed through the bypass, the valve must be diluted and the gas pressure can be regulated by immersion,
    Carrying out this process does not ensure sufficient purification of the measuring gas. On the contrary, it contains a hazard in the area of safety, and also contradicts the safety regulations, as dust and resins contained in the gas can cause an uncontrolled increase in pressure in the sampling system. Even the subsequent purification of the measuring gas with ceramic filters or other types of filters in this case does not provide a sufficient degree of cleaning necessary to ensure constant trouble-free operation of the gas analyzers.
    Such a failsafe mode is not possible. but it was also realized when high pressure side filters were used,
    Regardless of whether these filters are made of ceramic, fibrous or porous organic materials, the relatively short operating time leads them to clogging and, consequently, to an emergency downtime in the measurement readings.
    To eliminate these blockages, it is necessary to replace or clean the filters, which is associated with high labor costs.
    The use of electrostatic precipitators, especially for separating turbidity from liquids, such as fuel oil and solids, is prohibited because of the possibility of the formation of explosive mixtures, which cannot be eliminated with oxygen gasification under pressure of solid substances,
    In this case, the need to install explosion-proof equipment, such as a reverse ignition valve, etc., is associated with extremely high material costs. Moreover, this solution does not ensure complete emission of contaminants. The output of the separated products in different phases (liquid, pasty and solid) leads to further complications and price hikes.
    Later it was proposed to carry out the separation of liquid and solid contaminants using a centrifugal separator.
    The use of this method is hampered by the disadvantage that under these conditions radiation appears on the inlet nozzles on the walls of the cyclone.
    Taking into account the high gas pressure and safety requirements in a relatively short time It is necessary to measure the thickness of the gasket. In addition, also in this case, the withdrawal of excreted products is associated with certain difficulties.
    DD-PS 94909 describes a method for continuously sampling a raw gas of high temperature, in particular from a high pressure brown coal generator, as well as equipment for carrying out this one. process,
    With this solution, interdiction and emergency downtime occur due to insufficient technical conditions for heating the released products before being removed from the sampling system, due to the use of horizontal pipes and the absence of anisokinetic withdrawal /
    BDD-PS 110 345 describes a method and apparatus for pressurized gas containing pies and condensate, in particular crude gas, analytical measurement plates, which produce gas in the partial flow that is released by means of a throttling washer embedded in the main pipeline. flow, When pumping gas with a large amount of dust and tar, the use of a throttling device is complicated. This is because there is a risk of depositing these products in the main pipeline. Extensive production studies show that even a single gas discharge against the direction of pumping, especially in the absence of forced circulation, very often leads to the interruption of the sampling system and always to the contamination of the measuring gas system. From the field of technical research, in relation to the problem in question, it is known that, using a pump, such as an injector, it is possible to transfer the partial gas flow back to the main flow. Switching off the pump at the end of the sampling system ensures that the composition of the gas remains unchanged. It is also known that it is possible to continuously return with the help of such products in the gas cycle back to the gas production system. The aim of the invention is to create a method, as well as a corresponding installation, through which a very strong contamination is obtained. With raw gas and eliminating safety hazards, it is possible to supply cold gas to the gas analysis instruments used continuously and practically without maintenance costs with a minimum delay time that is free from p and the main part of contaminants, which is not changed during the sampling process. The invention is based on the task of comprehensively eliminating the disadvantages of the previously described methods and installations for sampling of raw gas. The goal is achieved by removing the crude gas from the head pipeline and from the built-in measuring gas pipeline, using a twofold anisokinetic method, then filtering on the high pressure side, expanding, removing condensate, then filtering again on the low pressure side The installation is carried out in an installation in which, for the first anisokinetic selection of crude gas, the extraction probe is placed in the center of the main pipeline in the direction of flow, and for volts cerned anizokineticheskogo selection measurement gas sampling probe located ie the center of the cooler exhaust conduit. . It is advisable that the part of the pipeline between the cooler and the ejector should be of such length, and the sampling probe of the measuring gas. must be located at such a distance relative to the cooler so that it is possible to reheat the suspension from the gas due to the effect of thermal conductivity. The drawing shows an installation for carrying out the method. The installation includes a main pipeline 1, a probe 2 located in the center of the pipe 1 in the direction current, pipeline 3, cooler 4, probe 5, located in the center of the pipeline 6 extending from the cooler, pipeline 7, valve 8, filter 9, pressure reducing valve 10, safety valve 11 , separator 12, filter 13, pipeline 14, injector 15, purge pipes 16, The invention is simple and easy to build, avoiding contact personnel with condensates and gases, avoiding the use of purge gases in the measuring gas system and the associated need for gas backflow under low pressure into the high pressure system, as well as the best use of the delay time. The invention is implemented as follows. The main pipeline 1 flows the studied crude gas with the following parameters: gas pressure of 2.5 Sha, gas temperature of 450-475 ° K, water vapor content - saturated under the specified conditions, solids content of 100-300 g / m, oil suspension and fuel oil 100 g / m. Using probe 2, located in the center of this pipeline 1 in the direction of flow, the test gas is taken anisokineticly and through the lifting pipeline 3 is carried out vertically located to cooler 4. At the exit of the cooler, the gas has a temperature of 300-320 to Products with a boiling point below this temperature are condensed. The measuring gas that is free from condensate is sampled by another probe 5 located in the center of the pipeline’s cooler by anisokinetic method and is carried out along the rising line 7 of the measuring gas to the high pressure filter 9. With this filter and the connected valve 8, the high and low pressure areas of the proposed device are separated. The measuring gas is decompressed by means of a pressure reducing valve 10. In this With the exemplary embodiment of the invention, the safety valve 11 should ensure the establishment of a secondary pressure on the reduction valve of 0.14 MPa. Through the connected separator 12 condensate and filter 13, the measuring gas, for safety reasons, is supplied to the analyzer with the following parameters: gas pressure 3 MPa, gas temperature 300–320 K (ambient temperature), water vapor content is undersaturated, the corresponding coefficient. to the expansion agent, the content of solid and oil-oil residues - the absence of clear traces on the control filter located in front of the analyzer. With a load of 200 l / h measuring gas, the lag time is 3-4 minutes, including the analyzing device. The temperature control after cooling the crude gas according to the invention ensures the liquid state of all products capable of condensation and the condensate of which simultaneously serves to remove solid particles, moreover, the possibility of solidification of fuel oil products is excluded. Below pipeline 6, the resulting condensate is evaporated using steam supplied through pipeline 14 and, together with unused uncleaned gas, is discharged through injector 15 into main pipeline 1 through inclined pipeline 3, In inclined pipeline 3 of test gas, and also in the discharge of raw gas is located shut-off arm, as well as purge pipes 16, representing technological control points, means of commissioning and cleaning, Input of raw gas to the sampling systems is constructed in such a way that immediately after and from the main pipeline, drop-down contaminants either flow backwards or into a vertically placed cooler. Such an arrangement prevents a sudden decrease in the consistency of the emitted particles at the entrance to the cooler. Placing the steam injector as a vehicle in the sampling system, determining the optimal pipeline diameters, as well as the distance between the exit from the cooler, shrinking of the measuring gas pipeline and the injector inlet, allows additional heating of the fuel-oil-fuel slurry generated in the cooler Avoid clogging (clogging) of parts of the equipment between the cooler and the injector. The advantages of the present invention are the sufficient fluidity of the substances released in the cooler, the avoidance of blockages, the resumption of the limited heating of the measuring gas, whereby a small amount of liquid and solid components of the suspended contaminants are allowed to flow and back out. possibly fallen into the pipeline of the measured gas and deposited there, in addition, restricting the preheat prevents the resumption of evaporation of the liquid gas contaminated in the cooler. The tap of the measuring gas pipeline from the embedded crude gas pipeline is designed in such a way that, due to temperature distribution, the released fuel oil from the turbidity in the measuring gas system remains liquid and, based on the selected angle between the pipeline, the measuring gas and the vertical embedded pipeline of the measuring crude gas can flow back about. Due to the created possibility of supplying the test gas to the input of the sampling equipment, it is possible to monitor the efficiency of the equipment and to observe the specified delay time. Recognized as an invention of p6 results of the examination carried out by the Office for the Invention of the German. Man. Democratic Republic
    权利要求:
    Claims (3)
    [1]
    1. A method for the continuous selection of a portion of a stream from crude gas for use as a measuring gas for monitoring or controlling a process, characterized in that from the main pipeline 1 of the crude gas, as well as from the built-in pipeline 6 of the measuring raw gas they are diverted by the double anisokinetic method, after which they are filtered on the high pressure side, expanded, purified from condensate, then filtered again on the low pressure side and brought to the installation: analyzer.
    [2]
    2. Installation for continuous extraction from the crude gas, so on and with the fact that for the first anisokinetic selection of the crude gas probe 2 sampling is placed in the center of the main pipeline 1 in the direction of flow, and for the second anisokinetic sampling probe 5 sampling gas is located in the center of the outgoing pipe from the cooler 6. Q
    [3]
    3 »Installation pop2, different from the fact that part of the pipeline; between cooler 4 and injector 15 should be an advantage. of such length, and the probe for sampling the measuring gas should be located at such a distance relative to the cooler so that it is possible to reheat the suspension emitted from the gas due to the effect of thermal conductivity.
    类似技术:
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    同族专利:
    公开号 | 公开日
    YU3880A|1983-12-31|
    US4317379A|1982-03-02|
    DD148172A3|1981-05-13|
    CS230655B1|1984-08-13|
    DE2946759A1|1980-07-17|
    JPS5595849A|1980-07-21|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2322018A|1941-01-16|1943-06-15|Standard Oil Dev Co|Sampling and metering device|
    US3255575A|1962-05-31|1966-06-14|Texaco Inc|Apparatus for obtaining bubble-free sample, and method for obtaining same|
    FR2272705B1|1974-05-30|1980-01-04|Elf Aquitaine|
    US4131011A|1977-02-28|1978-12-26|Abbott Laboratories|Method and device for determining the end point for drying|
    US4191541A|1978-08-14|1980-03-04|Container Corporation Of America|Method and apparatus for gas sample analysis|US4653334A|1986-01-21|1987-03-31|Ametek, Inc.|Flow inducer|
    US4942772A|1989-06-19|1990-07-24|Welker Engineering Company|Stack sampling system|
    US5053200A|1989-08-25|1991-10-01|Schaeffer Matthew J|Flammable vapor analyzer|
    US5205177A|1991-01-23|1993-04-27|Research-Cottrell, Inc.|Method and apparatus for gas monitoring|
    DE4131088A1|1991-09-18|1993-03-25|Siemens Ag|Gas concn. measurement in flue gas - by condensn. to obtain dry flue gas sample with withdrawal tube ending in condensn vessel which is joined by dry gas line to analyser unit|
    US5363874A|1992-10-08|1994-11-15|Sentry Equipment Corp.|Automated sample conditioning module|
    US5333648A|1992-10-13|1994-08-02|Sentry Equipment Corp.|Variable pressure reducing device|
    JPH07260644A|1994-03-26|1995-10-13|Horiba Ltd|Sampler for gas analysis|
    US5618996A|1996-03-01|1997-04-08|American Air Liquide Inc.|Metal sampling method and system for non-hydrolyzable gases|
    US5814741A|1996-03-01|1998-09-29|American Air Liquide Inc.|Metal sampling method and system for non-hydrolyzable gases|
    DE19939636B4|1999-08-20|2004-08-05|Sekundärrohstoff-Verwertungszentrum Schwarze Pumpe Gmbh|Process for the continuous sampling of raw gases|
    IT1394644B1|2008-11-28|2012-07-05|Danieli Off Mecc|DEVICE AND PROCEDURE FOR THE COLLECTION OF COMBUSTION FUMES|
    FR3039878B1|2015-08-07|2018-10-26|Snef|METHOD FOR SUPPLYING AN INSTALLATION INTO A GAS FLOW, FEEDING DEVICE AND ASSEMBLY COMPRISING SUCH A DEVICE|
    CN109812700B|2019-03-22|2021-02-19|杨天舒|Natural gas line sampling valve|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DD79210381A|DD148172A3|1979-01-08|1979-01-08|METHOD AND ARRANGEMENT FOR CONTINUOUS SAMPLING OF RAW GASES|
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