• 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:
    METHOD OF SELECTIVE CLEANING OF HOT GAS, including cooling; two stages of electrostatic precipitation and washing after the second stage of electrostatic deposition, characterized in that, in order to increase the cleaning performance of waste gases of the roasting of complex sulfide concentrates of non-ferrous metals, the gas is cooled after the first stage of electrostatic precipitation and after washing, the first cooling is injected water into the gas stream in an amount to maintain the temperature of the cooled gas below the dew point. CO with SAE h 00
    公开号:SU1103784A3
    申请号:SU742025315
    申请日:1974-04-30
    公开日:1984-07-15
    发明作者:Арвид Петерссон Стиг
    申请人:Болиден Актиеболаг (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to the cleaning of gases from drums and can be used in the metallurgical industry. A known method for the selective purification of hot gas, which includes cooling, two stages of electrostatic deposition and washing after the second stage of electrostatic precipitation, fl j The disadvantage of the known method is that the second stage of electrostatic precipitation takes place in the sea mode, limiting the performance cleaning up. The purpose of the invention is to improve the cleaning performance of the firing gases from the firing of complex sulfide concentrates of non-ferrous metals. The goal is achieved by the fact that according to the method of selective purification of hot gas, which includes cooling, two stages of dry electrostatic precipitation and washing after the second stage of electrostatic precipitation, the gas is cooled after the first stage of electrostatic precipitation and after washing, and the first cooling is carried out by spraying water into the stream an amount of gas sufficient to maintain the temperature of the cooled gas below the dew point. The drawing shows the devices for implementing this method. Chalcopyrites enter the multistage furnace 1 through line 2, and the burned material is discharged through line 3. Air is introduced into the kiln through duct A. Dusty gas. In duct 5, it is sent to cyclone 6, where the coarse fraction of the pie is collected. The captured solid material is returned to furnace 1 via line 7. Partially freed of dust, gas is directed through line 8 to a hot electrostatic precipitator 9, where hot gases at a temperature near them are freed from dust particles still contained in them, zinc, iron and) I Separated dust through conduit 10 is returned to the furnace 1. If this separated material contains a large amount of lead and antimony, then by returning to the furnace 1, it can be cleaned of lead and antimony by known methods (not shown) . Next, the gas to be purified through the duct 1 enters the cooling tower 12, where it is cooled by evaporating the injected water through the pipe 13. After cooling to 100-150 ° C, the gas through the 14-n duct is directed to the second electrostatic precipitator 15, where it is separated and removed Pipeline 16 contains condensed parts such as arsenic, selenium and mercury. The choice of temperature depends on the amount of sulfuric anhydride and the gas condensation point, provided that water in the electrostatic precipitator is prevented from condensing. For further purification, the gas through the duct 17 enters the washing tower 18, where it is washed with water flowing through pipeline 19 and exiting through pipeline 20. Pipeline 20 is connected to pipeline 19 through pipeline 21. Part of the washing water contaminated during washing the branch pipe 22 is connected to the pipe 13 for use as cooling water in the evaporative cooling process in the cooling tower 12. Then the gas through the duct 23 enters the cooling unit 24, consisting of an air cooler in which the gas is indirectly cooled through the walls of the pipeline 25 by the water discharged through pipeline 26. This cooling condenses some water from the gases, which is introduced into the circulating washing water of the washing tower 18 through pipes 27 or 28 and 13 into the cooling tower 12. In in certain cases it is necessary, in connection with the absorption of sulfuric anhydride by the washing water, to withdraw a small amount from the water circulating in the washing tower. The destruction of the resulting sulfuric acid can also be carried out by adding lime, ammonium hydroxide or caustic soda. In the real case, evaporative cooling is carried out with a gas in an amount of 40,000, containing water approximately, out. through a gas flue 29 with a water content of 1 m / h. Therefore, the system must be fed with water in an amount of 0.2 m / h via conduit 30. Thus, the system has only three outlets, namely conduit 3 for the calcined material, conduit 16 for arsenic, selenium and mercury and purified gas outlet through the duct 29 For adiabatic cooling flow I 110378A4
    Approximately 4 water, which is directed to the first stage, is cooling at 0.1 l / h per 1 nm / gas. so that the washed particles. The main amount of water for evaporation is released and precipitated in electrofusion cooling is obtained by filter 15.
    recuperative cooling in the end-5 method has a large potential
    stage. In order to avoid accumulation, the field of application is not only for the flash-burning processes in the flush water, but also for the pyro-tower 18 some part of this water-metallurgical industry.
    权利要求:
    Claims (1)
    [1]
    METHOD FOR SELECTIVE CLEANING OF A HOT GAS, including cooling * two stages of electrostatic deposition and washing after the second stage of electrostatic deposition, characterized in that, in order to increase the purification efficiency of the exhaust gases from the firing of complex sulfide non-ferrous metal concentrates, the gas is cooled after the first stage of electrostatic deposition and after washing, and the first cooling is carried out by injected water into the gas stream in an amount that ensures the temperature of the chilled ha beyond below the dew point. §
    SL with "I 1103784 f 1Ϊ03
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    同族专利:
    公开号 | 公开日
    DD111295A5|1975-02-12|
    PH10157A|1976-09-13|
    AU6842674A|1975-11-06|
    DE2420639B2|1981-04-23|
    BE830252Q|1975-10-01|
    JPS5852683B2|1983-11-24|
    FR2227904B1|1978-01-27|
    US3899308A|1975-08-12|
    ZA742669B|1975-04-30|
    CA1030078A|1978-04-25|
    ES425846A1|1976-06-16|
    JPS5014572A|1975-02-15|
    DE2420639A1|1974-11-21|
    SE373114B|1975-01-27|
    FR2227904A1|1974-11-29|
    BG32267A3|1982-06-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US1204906A|1914-07-23|1916-11-14|Research Corp|Method and means for recovering certain constituents from gaseous bodies.|
    US1728130A|1925-01-03|1929-09-10|Mathesius Walther|Process of purifying gases from blast furnaces|
    ES125824A1|1931-05-01|1932-04-16|Ig Farbenindustrie Ag|PROCEDURE FOR PURIFICATION OF ROASTING GASES|
    DE667791C|1934-07-01|1938-11-19|Patentverwertung|Process for the two-stage electrical cleaning of roast gases with intermediate wet cooling|
    US2681121A|1951-06-29|1954-06-15|Research Corp|Recovery of suspended materials from gases|
    FR1063127A|1952-06-03|1954-04-29|Metallgesellschaft Ag|Process and devices for cooling and purifying industrial gases laden with dust and in particular roasting gas|
    US2706533A|1953-05-22|1955-04-19|Research Corp|Gas conditioning method and apparatus|
    US3094409A|1959-03-31|1963-06-18|Int Nickel Co|Method for roasting sulfides|
    DE1457114B2|1964-03-18|1970-06-11|Onoda Cement Company Ltd., Onoda City |System and process for electrical dust separation|
    JPS506675B1|1970-11-28|1975-03-17|US4204844A|1974-07-26|1980-05-27|Pilat Michael J|Liquid transfer system for conductive liquids|
    SE403277B|1976-04-09|1978-08-07|Boliden Ab|PROCEDURES FOR WATER PURIFICATION OF GASES CONTAINING SULFUR DIOXIDE, HALOGENES AND AT LEAST ONE VOLATILE SUBJECT FROM THE GROUP INCLUDING ARSENIC AND ARSENIC ASSOCIATIONS|
    US4120098A|1976-06-22|1978-10-17|E. I. Du Pont De Nemours And Company|Solvent exchange drying of membranes for gas separation|
    US4193774A|1976-12-21|1980-03-18|Pilat Michael J|Electrostatic aerosol scrubber and method of operation|
    DE2710627A1|1977-03-11|1978-09-14|Metallgesellschaft Ag|METHOD FOR TREATING SULFURIZED EXHAUST GAS|
    JPS5636758B2|1977-03-29|1981-08-26|
    SE454846B|1986-02-06|1988-06-06|Flaekt Ab|SET AND DEVICE FOR CLEANING A POLLUTION AMOUNTED OF HOT GAS FLOW|
    EP0274037A1|1986-12-10|1988-07-13|BBC Brown Boveri AG|Process and device for the separation of particles|
    DE3784324D1|1986-12-10|1993-04-01|Bbc Brown Boveri & Cie|METHOD AND DEVICE FOR SEPARATING AND / OR REVOLVING PARTICLES.|
    US5370720A|1993-07-23|1994-12-06|Welhelm Environmental Technologies, Inc.|Flue gas conditioning system|
    US5665142A|1994-04-12|1997-09-09|Wilhelm Environmental Technologies, Inc.|Flue gas conditioning system and method using native SO2 feedstock|
    US7022296B1|1997-07-10|2006-04-04|University Of Cincinnati|Method for treating flue gas|
    DE10011531A1|2000-03-13|2001-09-27|Montan Tech Gmbh|Raw coke gas sampler feeds analysis instrument via heated electro-filter protected from condensation via a gas cooler|
    US6551382B1|2002-05-24|2003-04-22|Clyde N. Richards|Hot-humid/cold gas scrubbing process and apparatus|
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    US7815714B2|2007-12-20|2010-10-19|General Electric Company|Systems and methods for removal of particulate matter in a filtration system|
    US8409535B2|2010-11-03|2013-04-02|Calpine Corporation|System and method for removing a contaminant from a gas stream|
    RS54064B1|2011-10-21|2015-10-30|ENEFIT OUTOTEC TECHNOLOGY OĂś|Process and apparatus for winning oil from a vapor gas mixture|
    RS54065B1|2011-10-21|2015-10-30|ENEFIT OUTOTEC TECHNOLOGY OĂś|Process and apparatus for dedusting a vapour gas mixture|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE7306101A|SE373114B|1973-05-02|1973-05-02|
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