• 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:
    The subject of this invention is a plant (1) for the absorption of individual components such as pollutants or valuable substances in gases, in particular in flue gases, in which an absorption solution (5) in an absorption space (3) is brought into contact with the gas, wherein the absorption solution ( 5) is introduced via spray nozzles (8, 8a, 8b) into the absorption space (3). The absorption space (3) has, above the gas supply (6), a gas distribution plane (7) through which turbulences in the supplied gas flow are caused. According to the invention, this gas distribution plane (7) has spray nozzles (8, 8a, 8b), via which the absorption solution (5) is supplied. The subject of this invention is also a method for the absorption of pollutants and valuable substances in gases.
    公开号:AT512543A4
    申请号:T794/2012
    申请日:2012-07-17
    公开日:2013-09-15
    发明作者:Christian Dipl Ing Baumann；Josef Ing Koeck；Harald Dr Reissner；Andreas Ing Resch
    申请人:Andritz Energy & Environment Gmbh；
    IPC主号:
    专利说明:

    734Θ-Α1 * 1 I ·····························································
    Plant and method for absorbing individual components in gases
    The subject of this invention is an apparatus for absorbing individual components (e.g., pollutants) in gases, in which an absorbing solution in an absorption space is contacted with the gas. The absorption solution is introduced via spray nozzles into the absorption space, wherein the absorption space above a feed opening for the gas has a gas distribution plane, are caused by the turbulence or turbulence in the supplied gas stream.
    The invention also relates to a process for the absorption of pollutants in gases.
    In many industrial processes, in particular in combustion processes, exhaust gases or exhaust air, which contain acidic components such as sulfur dioxide (SO2), hydrochloric acid (HCl), hydrogen fluoride (HF) and / or nitrogen oxides (NO, NO2), which due to their harmfulness to the Ecosystem are referred to as pollutants or recyclables, such as Metal oxides, which are put into a gaseous state by the treatment process.
    For the protection of the environment, therefore, statutory provisions have been issued for permissible limits of substances in exhaust gases. In order to comply with these limits, it is often necessary to clean the exhaust gases.
    From the prior art, various technologies for so-called wet exhaust treatment are known, which are already used industrially. With these methods in 2 734Θ-Α1
    Power plant area is used for the deposition of pollutants (SO2, HCl, HF) an absorption solution. It is usually a calcium sorbent (limestone, quicklime and hydrated lime). These calcium compounds are mixed with water, are then present as a suspension and are brought into contact with the acidic gases present in the flue gas in an absorption space, so that the absorption of the pollutants from the gaseous to the liquid phase can take place. The acidic pollutants absorbed into the liquid phase are then dissolved in ionic form and react with the calcium ions of the lime sorbent dissolved in the suspension.
    Depending on the further process control, the resulting reaction products can remain dissolved in the suspension, form crystals with appropriate supersaturation and finally precipitate even in solid form. The predominant pollutant in exhaust gases from the power plant sector, especially in oil and coal fired combustion processes, is sulfur dioxide SO 2.
    In so-called flue gas desulphurisation plants, the SO 2 is separated from the flue gas by the previously described method, with the limestone in the form of a limestone suspension being used as the absorption solution. In these plants usable gypsum (CaSOi * 2H20) is formed from the absorbed sulfur dioxide SO2 and the dissolved limestone in the suspension after oxidation and crystallization processes.
    From the prior art it is known to carry out the absorption space for flue gas desulfurization as a spray tower in the form of a drop column. In this spray tower, the limestone suspension is spread over several of the 3 • ♦ * * ι ········································. ································
    Usually horizontally arranged spray levels sprayed with spray nozzles in a vertical smoke gas flowing through apparatus. The limestone suspension drops emerging from the spray nozzles come into contact with the flowing flue gas and heat and mass transfer processes occur. These systems often also have a gas distribution level (for example REA plus level or tray) above the gas supply, by means of which the supplied gas is uniformed on the one hand and a highly turbulent suspension regime (liquid layer) is generated on the other hand. The gas distribution level consists, for example, of a multiplicity of interconnected tubes.
    The sulfur dioxide SO2 contained in the flue gas is dissolved by absorption in the suspension drop and reacts as a result of the calcium ions also dissolved (Ca ++) via intermediates to calcium sulfite and after further oxidation by the dissolved oxygen in the drop to calcium sulfate.
    The suspension drops fall down and continuously absorb sulfur dioxide along their path. In the lower part of the contact apparatus they are collected in a so-called sump and brought to increase the contact time by a circulation system again via the spray levels with the flue gas in contact.
    Through appropriate control and control circuits, the limestone suspension, process water (evaporation loss of the droplets) and oxidation air are continuously metered into the absorption space, as well as suspension is withdrawn from the sump, so that a stationary state is established. The withdrawn suspension from the sump is generally fed into a downstream dewatering unit for the production of gypsum in 4 × 10 × 10 × 10 -3 × 10 -3.
    A disadvantage of the flue gas scrubber described by spray towers are the required dimensions of the plants with 20- 40 m high towers and the comparatively high energy consumption.
    In other embodiments, as described in US 6,051,055, the absorption solution is sprayed through upward spray nozzles in the absorption space. In the absorption room, apart from the spray nozzles, there are no further installations which lead to a homogenization of the gas flow.
    Alternatively, WO 2010/006848 discloses a plant in which the gas is passed in a first stage as a disperse phase through a suspension layer and in a second stage as a continuous phase, in which the suspension is sprayed as a disperse phase and wherein the two stages are structurally united in a single wash tower. So here are the advantages of drop and bubble column by combining the two methods used in a common contact apparatus.
    A disadvantage of this system is that the suspension feed of the first stage is carried out by a separate suspension distribution level, which increases the overall height of the contact apparatus. Due to the overall height of the suspension distribution level, there is a disadvantage both in the energy requirement and in the material requirement through the use of a substructure and a separate spray level for the first stage. 5 72SW-A1-
    The invention has for its object to improve the described method.
    The object is achieved with a system for absorbing individual components such as pollutants or valuable substances in gases, in which the gas distribution level has spray nozzles, through which the absorption solution is supplied.
    The system according to the invention thus has a gas distribution level with integrated suspension feed. The gas distribution level thus has the function of distributing and equalizing the gas supplied, to form a turbulent absorption regime and to supply the absorption solution.
    The advantage of this invention is the low required pump differential pressure required for recirculation of the absorption liquid. On the one hand, for the introduction of the absorption solution, a lower nozzle pressure (0.2 to 0.4 bar; see standard nozzles 0.5 to 1 bar) is sufficient, but the major part of the energy saving results from the lower geodetic height difference that the pump overcomes since the addition of the absorption solution takes place at the level of the gas distribution level (REA Plus level). This concept results in a very good overall energy utilization in different load cases.
    The spray nozzles are preferably designed as impact nozzles, thereby the absorption solution can be finely distributed in the gas distribution level.
    The spray nozzles are preferably directed upwards so in the flow direction of the gas. 6 6 ft ft i • · # ♦ ft • ft · ft ·
    Vaw-Ai; «· · · · ·«
    In one embodiment of the system, the absorption solution can also be sprayed from the gas distribution level via further downwardly directed spray nozzles, thereby creating an additional quenching effect below the gas distribution level.
    It is favorable if one or more spray levels are arranged above the gas distribution level, via which absorption solution is likewise introduced into the absorption space. This further increases the cleaning performance of the system.
    The gas distribution level is formed for example by a support structure or by a plurality of self-supporting tubes, wherein the spray nozzles are arranged on the tubes and the absorption solution can be supplied via the tubes.
    In each case a displacement mandrel can be arranged in the tubes, whose cross section increases in the flow direction of the absorption solution. This results in a uniform suspension distribution over the spray nozzles on the distribution level. About the displacement mandrels can also be supplied to clean the system rinse water.
    The invention also relates to a process for the absorption of pollutants in gases, in which an absorption solution in an absorption space is brought into contact with the gas, wherein the supplied gas is distributed and swirled over a gas distribution plane. According to the invention, the absorption solution is fed to the gas distribution level and introduced into the absorption space via spray nozzles. 7 • * 9 »·« «· · · · · 9 ·« «I · ♦ 99 · 9 99 7340-At · I I 4 99 99 9 999
    In the following the invention will be described with reference to drawings. Show it:
    Fig. 1 shows an exemplary embodiment of the system according to the invention;
    Fig. 2a is a plan view of the gas distribution plane;
    FIG. 2b shows a detail of the gas distribution plane; FIG.
    3 shows a longitudinal section through a pipe of the gas distribution level with displacement mandrel.
    4 a baffle nozzle for the supply of the absorption solution;
    5 shows a further embodiment of a baffle nozzle;
    The same reference numerals in the individual figures denote the same features.
    Fig. 1 shows a cross section through a flue gas cleaning system according to the invention 1. The flue gas flows through the gas supply 6 in the cylindrical absorption space 3 and is deflected in a vertical upward flow. The flue gas flows through the absorption space 3 from bottom to top and leaves it through the flue gas outlet 2. Directly above the gas supply 2 is the gas distribution level 7. The gas distribution level 7 consists of a plurality of individual tubes 11, which are connected to each other via connecting pipes 18 or connecting elements , Through the gas distribution level 7, the flue gas is distributed more uniformly within the Absorptionskämmer 3 and also induced turbulence in the flue gas, which lead to a more intensive mixing of the gas with the absorption solution 5. 8th
    * ;;; 72 | o-at
    The gas distribution device 7 is supported by the container wall 16.
    The tubes 11 of the gas distribution device 7 have spray nozzles 8, via which the absorption solution 5 is introduced into the absorption space 3. The spray nozzles 8 are designed here as upwardly directed impact nozzles 8a. In addition, further downwardly directed baffle nozzles 8b are provided here as well, through which absorption solution 5 is also sprayed.
    In the upper area of the absorption space 3, absorption solution 5 is also introduced via the spray nozzles of the spray level 4, which comes in contact with the flue gas in droplet form.
    Below the gas supply 6 is the scrubber sump 13. The settling of solid particles in the scrubber sump 13 is prevented by the agitator 9, which also ensures sufficient mixing. The oxidation is ensured by a separate oxidation air supply 19. In order to keep the entire washing system in a steady state operation, fresh limestone suspension (absorption solution) is supplied via the line 10 and a corresponding suspension stream 12 for the extraction of gypsum is discharged from the washing system.
    Directly above the gas supply 6, a re-dispersing plate 17 is arranged. This sheet 17 catches the absorption solution 5 coming from above and directs it as a curtain into the scrubber sump 13. The supplied gas passes through this curtain as it enters the absorption chamber 3 and is thereby cooled. 9 9 • * Μ ·· »· * * · ► · · · ·« · ► # · · · «* · * ·» · · · · 7240-ΑΤ • * * · · »» I · • · · · · · ♦
    In Fig. 2a is a plan view of the gas distribution level 7 is shown. The gas distribution level 7 here consists of a plurality of tubes 11, which are connected to each other via connecting pipes 18 or connecting elements. It is therefore a rust-like construction, through which the gas is swirled and homogenized. The gas distribution level is referred to in professional circles as the REA-Plus level. The absorption solution 5 is also supplied via the tubes 11 and distributed through the upwardly directed baffle nozzles 8a.
    FIG. 2 b shows a detail of the gas distribution level 7, in which, in contrast to FIG. 2 a, the connecting tubes 18 are arranged parallel to the tubes 11. In the tubes 11 displacement mandrels 14 are arranged, through which flushing water 15 can be supplied.
    In Fig. 3 is a section through a pipe 11 of the gas distribution level 7 is shown. The displacement mandrel 14, whose cross-section widens in the direction of flow 20 of the absorption solution 5 and thus provides for a homogenization of the supply of solution to the impact nozzles 8a and 8b, can be clearly seen here. The baffles 8b are directed downwards, counter to the flow direction of the gas. About the flushing water supply 15, the tube 11 can be cleaned.
    Fig. 4 shows an embodiment of a possible baffle nozzle 8a, 8b, this is located above the nozzle opening 21, a baffle plate 22 through which the absorption solution 5 is deflected. Instead of the 10 "·: !! 72 ^ 0-Ατ
    Baffle plate 22 can also be used a baffle cone 23, as shown in Fig. 5.
    权利要求:
    Claims (9)
    [1]
    11 • · ·· 4 »• · · t« • * «« «* • ♦ * Φ * · * · · * ··» · **

    7240-AT • * 1. Claims (1) for the absorption of individual components such as pollutants or valuable substances in gases, in which an absorption solution (5) in an absorption space (3) is brought into contact with the gas, wherein the absorption solution (5) via spray nozzles (8, 8a, 8b) is introduced into the absorption space (3) and wherein the absorption space (3) above a gas supply (6) for the gas has a gas distribution plane (7), are caused by the turbulence in the supplied gas stream, characterized in that the gas distribution plane (7) has spray nozzles (8, 8a, 8b) via which the absorption solution (5) is supplied.
    [2]
    2. Plant according to claim 1, characterized in that the spray nozzles (8, 8a, 8b) of the gas distribution plane (7) at least partially as impact nozzles {8a, 8b) are formed.
    [3]
    3. Plant according to claim 1 or 2, characterized in that the spray nozzles {8, 8a, 8b) are directed upwards, ie in the flow direction of the gas.
    [4]
    4. Plant according to claim 3, characterized in that further spray nozzles (8b) are provided, which are directed towards the lower, that is opposite to the flow direction of the gas.
    [5]
    5. Plant according to one of claims 1 to 4, characterized in that above the gas distribution level (7) at least one spray level (4) is arranged, is introduced via the also absorption solution (5) in the absorption space (3). 12



    72 $ 0-ΑΤ * «« · ·
    [6]
    6. Installation according to one of claims 1 to 5, characterized in that the gas distribution level (7) from a plurality of tubes (11) is formed, wherein the spray nozzles (8, 8a, 8b) are arranged on the tubes (11) and the absorption solution (5) through the tubes (11) to the absorption space (3) can be supplied.
    [7]
    7. Plant according to claim 6, characterized in that in the tubes (11) each have a displacement mandrel (14) is arranged, whose cross-section increases in the flow direction (20) of the absorption solution (5).
    [8]
    8. Plant according to claim 7, characterized in that on the displacement mandrels (14) rinse water (15) can be fed.
    [9]
    9. A method for absorbing individual components such as pollutants or valuable substances in gases, in which an absorption solution (5) in an absorption space (3) is brought into contact with the gas, wherein the supplied gas is distributed and swirled over a gas distribution plane (7), characterized in that the absorption solution (5) of the gas distribution level (7) is fed and is introduced via spray nozzles (8, 8a, 8b) in the absorption space (3).
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    同族专利:
    公开号 | 公开日
    AT512543B1|2013-09-15|
    CN103537169B|2017-03-01|
    EP2687281B1|2015-09-16|
    KR102036295B1|2019-10-24|
    HRP20151359T1|2016-01-15|
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    RU2013131447A|2015-01-20|
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    ES2556035T3|2016-01-12|
    CN103537169A|2014-01-29|
    KR20140010902A|2014-01-27|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE69103747T2|1990-02-23|1995-03-02|Ahlstroem Oy|METHOD AND DEVICE FOR PURIFYING EXHAUST GAS.|
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    WO1998033577A1|1997-02-05|1998-08-06|ABB Fläkt AB|Open contact reactor|
    JP2000210533A|1999-01-22|2000-08-02|Nkk Corp|Flue gas desulfurizer|
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    US5620144A|1995-02-10|1997-04-15|The Babcock & Wilcox Company|Stacked interspacial spray header for FGD wet scrubber|
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    DE112006003662T5|2006-01-12|2008-11-27|Babcock-Hitachi K.K.|Wet flue gas sulfurizer|
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    PL2361667T3|2010-02-25|2015-07-31|General Electric Technology Gmbh|A wet scrubber and a method of cleaning a process gas|
    PL2463014T3|2010-12-10|2018-10-31|General Electric Technology Gmbh|A wet scrubber comprising deflector plates, and a method of cleaning a process gas|CN106731490A|2015-11-25|2017-05-31|衡阳市骏杰化工有限公司|A kind of chlorinated paraffin produces tail gas treatment process|
    CN106178898B|2016-08-31|2018-11-20|江苏理文造纸有限公司|Paper mill waste gas purification apparatus|
    AT520534B1|2018-04-19|2019-05-15|Andritz Ag Maschf|Plant for the absorption of individual components from gases|
    CN110013741B|2019-05-15|2021-08-24|山东洲星生物技术有限公司|Desulfurization method for flue desulfurization assembled module|
    RU2715844C1|2019-06-13|2020-03-03|Федеральное государственное бюджетное образовательное учреждение высшего образования "Юго-Западный государственный университет" |Device for absorption of separate components in gases|
    CN112370942B|2020-11-02|2021-11-09|江苏春江润田农化有限公司|Hydrogen chloride and sulfur dioxide mixed tail gas separation device|
    法律状态:
    2015-09-15| PC| Change of the owner|Owner name: ANDRITZ AG, AT Effective date: 20150721 |
    优先权:
    申请号 | 申请日 | 专利标题
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    ES13003033.1T| ES2556035T3|2012-07-17|2013-06-13|Installation and procedure for the absorption of certain individual components in gases|
    RS20150778A| RS54385B1|2012-07-17|2013-06-13|System and method for the absorption of individual components in gases|
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    HRP20151359TT| HRP20151359T1|2012-07-17|2015-12-09|System and method for the absorbtion of individual components in gases|
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