• 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:
    A process for the simultaneous removal of nitrogen oxides and sulfur oxides from a gas stream containing oxygen, in addition to nitrogen oxides and sulfur oxides, is disclosed.
    公开号:SU740143A3
    申请号:SU772448803
    申请日:1977-02-09
    公开日:1980-06-05
    发明作者:Эвердинус Геррит Плуг Иоханнес
    申请人:Шелл Интернэшнл Рисерч Маатсхаппий Б.В. (Фирма)；
    IPC主号:
    专利说明:

    (54) METHOD FOR CLEANING OXYGEN-CONTAINING
    GAS FROM SULFUR AND NITROGEN OXIDES;
    one .
    The invention relates to a method for purifying waste gases from sulfur oxides and nitrogen oxides and can be used in the chemical industry and in the field of energy.
    The known method of purification of waste gases from sulfur oxides and nitrogen oxides by passing it through a layer of copper-containing absorber with simultaneous reduction of nitrogen oxides by ammonia and after the regeneration of the absorber by blowing with reducing gas 1.
    However, according to a known method, the degree of purification from oxides abpta does not exceed 65-70%.
    This is due to the fact that, in the presence of copper containing a coolant, ammonia, introduced to reduce nitrogen oxides, will be oxidized, resulting in an additional amount of nitrogen oxides.
    The aim of the invention is to increase the degree of gas purification from nitrogen oxides.
    The goal is achieved by the fact that in the proposed method of purification of oxygen-containing gas the absorber regeneration is carried out on
    2
    The remaining amount of the unregenerated absorber, which is copper sulfate, has a catalytic effect on the reduction of nitrogen oxides by ammonia. Since the reducing gas and the gas to be purified are supplied countercurrently from the opposite ends of the reactor, the initially gas stream is in contact with the absorber, which is copper sulfate. When this occurs, the reduction of nitrogen oxides. With the further passage of gas, contacting with the already regenerated gas occurs.
    ts absorber, which is copper oxide, while the gas stream no longer contains ammonia.
    Example 1. Flue gases containing 0.2 vol.% 50 and 0.035 vol.%
     nitrogen oxides are passed through one of the two reactors, in which the absorber is placed in layers. The absorber is copper oxide deposited on alumina in the amount of 5%,
    After the absorber enters the sulphate form, the stream of gas to be purified is directed to the second
    “„ The reactor, in the first reactor, carried out a gas (hydrogen, carbon monoxide, methane) diluted with water vapor by 30–40%, vol. The temperature of purification and regeneration is the same and equals 325475 С. The reducing gas is fed to the 8th reactor from the end opposite to the input of the gas to be purified.
    The amount of reducing gas required to regenerate the scavenger is determined by the concentration of hydrogen in it after passing through the last layer of the scavenger.
    The table presents data on the degree of purification from nitrogen oxides, depending on the amount of unregenerated absorber.
    Table continuation.
    eight
    75,100
    92
    65
    It is not possible to leave less than 70% of the absorber recovered, since this will reduce the degree of gas cleaning from sulfur oxides.
    权利要求:
    Claims (1)
    [1]
    1. For the application of the Federal Republic of Germany No. 2341241, cl. 12 e 3/02, 14.02.74 (prototype).
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    同族专利:
    公开号 | 公开日
    ZA77738B|1977-12-28|
    AU2210477A|1978-08-17|
    CS192476B2|1979-08-31|
    RO78793A|1982-04-12|
    FR2340764A1|1977-09-09|
    GB1565271A|1980-04-16|
    FR2340764B1|1981-01-09|
    JPS5297366A|1977-08-16|
    SE430854B|1983-12-19|
    SE7701463L|1977-08-12|
    DE2705434A1|1977-08-18|
    NL7601371A|1977-08-15|
    US4101634A|1978-07-18|
    AU507322B2|1980-02-14|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3778501A|1971-06-04|1973-12-11|Exxon Research Engineering Co|Regeneration of flue gas desulfurization sorbents|
    BE790816A|1971-11-01|1973-04-30|Exxon Research Engineering Co|FLUE GAS DESULFURATION FOR THE USE OF A LARGE VACUUM SORBANTA|
    GB1438119A|1972-09-01|1976-06-03|Exxon Research Engineering Co|Removal of nitrogen oxides and sulphur oxides from gases|
    CA1007830A|1972-09-01|1977-04-05|Albert B. Welty |Removal of nitrogen oxides from flue gas|
    US4002723A|1973-09-29|1977-01-11|Hitachi Shipbuilding And Engineering Co., Ltd.|Method of removal of nitrogen oxides|
    GB1448550A|1974-01-31|1976-09-08|Japan Gasoline|Process for the removal of nitrogen oxides from a gas stream|
    JPS50157257A|1974-06-10|1975-12-19|
    GB1523726A|1974-09-24|1978-09-06|Shell Int Research|Process for removing no from a flue gas by selective reduction with|NL7906181A|1979-08-14|1981-02-17|Shell Int Research|PROCESS FOR THE SIMULTANEOUS REMOVAL OF NITROGEN OXIDES AND SULFUR OXIDES FROM A GAS FLOW.|
    AT396206B|1991-03-08|1993-07-26|Techform Engineering Gmbh|REDUCTION, CONVERSION, AND / OR REMOVAL OF POLLUTANTS RESULTING FROM COMBUSTION AND / OR INDUSTRIAL AND / OR ENVIRONMENTAL RELIEF PROCESSES|
    US5202101A|1991-03-21|1993-04-13|General Electric Environmental Services|Regenerative process and system for the simultaneous removal of particulates and the oxides of sulfur and nitrogen from a gas stream|
    US6447437B1|2000-03-31|2002-09-10|Ut-Battelle, Llc|Method for reducing CO2, CO, NOX, and SOx emissions|
    US7563423B2|2006-12-22|2009-07-21|Alstom Technology Ltd|Method and apparatus for catalyst regeneration|
    CA3038760A1|2016-10-14|2018-04-19|Liwei Huang|A noxious gas purificant and its preparation and purification method thereof|
    EP3655136A4|2017-07-20|2021-04-14|Ariel Scientific Innovations Ltd.|Catalytic oxidation of nox/sox in flue gases with atmospheric oxygen as the oxidation reagent|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    NL7601371A|NL7601371A|1976-02-11|1976-02-11|PROCEDURE FOR THE SIMULTANEOUS REMOVAL OF NITROGEN OXIDES AND SULFUR OXIDES FROM A GAS FLOW.|
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