Method for cleaning and purifying sulfur-containing tail gases

A tail gas cleaning and tail gas technology, applied in chemical instruments and methods, separation methods, gas treatment, etc., can solve the problems of rapid diffusion of unfavorable tail gas, low desulfurization efficiency of activated carbon, unstable process operation, etc., achieve good desulfurization and purification effect, reduce Adverse effects, effects of many active sites

Active Publication Date: 2019-07-26
安徽皖华环保设备科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the efficiency of activated carbon desulfurization is low, and it is easily affected by the previous treatment process. The micropores are blocked by impurities in the tail gas and affect the activity, and the process operation is unstable. In addition, the tail gas temperature after activated carbon desulfurization is generally low, which is not conducive to tail gas Rapid diffusion, easy to form smog

Method used

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  • Method for cleaning and purifying sulfur-containing tail gases

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Embodiment 1

[0025] A method for cleaning and purifying sulfur-containing tail gas, comprising the following steps:

[0026] (1) The acidic sulfur-containing tail gas is passed into the combustion furnace for treatment at 1100 ° C. The treated gas is first passed into the waste heat boiler for waste heat recovery, and then passed into the first-level Claus reactor, the first-level Claus reactor The inlet temperature is 235°C. After the reaction is carried out in the first-stage Claus reactor, it is cooled to 150°C by the first-stage condenser, and then heated to 225°C by the heat exchanger, and then passed into the second-stage Claus reactor. After the reaction, it is cooled to 150°C by the secondary condenser to condense and separate the liquid sulfur to be collected through the liquid sulfur trap, and the Claus tail gas after the liquid sulfur is separated enters the next step of treatment;

[0027] (2) Send the Claus tail gas to the bottom of the spray tower to make the gas run upwards....

Embodiment 2

[0032] A method for cleaning and purifying sulfur-containing tail gas, comprising the following steps:

[0033](1) The acidic sulfur-containing tail gas is passed into the combustion furnace for treatment at 1300 ° C. The treated gas is first passed into the waste heat boiler for waste heat recovery, and then passed into the first-level Claus reactor, the first-level Claus reactor The inlet temperature is 245°C. After the reaction is carried out in the first-stage Claus reactor, it is cooled to 160°C by the first-stage condenser, and then heated to 235°C by the heat exchanger, and then passed into the second-stage Claus reactor. After the reaction, it is cooled to 160°C by the secondary condenser to condense and separate the liquid sulfur to be collected through the liquid sulfur trap, and the Claus tail gas after the separation of liquid sulfur enters the next step of treatment;

[0034] (2) Send the Claus tail gas to the bottom of the spray tower to make the gas run upwards....

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Abstract

The invention belongs to the technical field of waste gas treatment, and discloses a method for cleaning and purifying sulfur-containing tail gases. The method includes the following steps: subjectingthe acidic sulfur-containing tail gases to a second-stage Claus reaction, feeding the reacted Claus tail gases to the bottom of a spraying tower, enabling the gases to run upwardly, discharging the gases from the top of the spraying tower after the gases contact with clear water downwardly sprayed from a spray nozzle at the top of the spraying tower, injecting the gases into a primary adsorptiontower provided with CuO activated carbon adsorbents to conduct adsorption treatment, cooling the gases by a heat exchanger, injecting the gases into a secondary adsorption tower provided with boron-nitrogen double-doped iron oxide activated carbon composite adsorbents to conduct adsorption treatment, and discharging out the treated gases. The method for cleaning and purifying the sulfur-containingtail gases has the advantages that efficient and stable desulfurization can be realized, the operational stability of the process is high, the treated gases can be directly discharged into the atmosphere, the diffusion speed is high, and formation of haze can be effectively prevented.

Description

technical field [0001] The invention relates to the technical field of waste gas treatment, in particular to a method for cleaning and purifying sulfur-containing tail gas. Background technique [0002] In recent years, with the rapid development of the economy, the demand for energy is increasing day by day, and the petrochemical and coal chemical industries have grown rapidly. Since most petrochemical and coal chemical enterprises will form sulfur-containing process tail gas during production, these tail gases contain a large amount of H 2 S and SO 2 If toxic and harmful gases such as sulfur dioxide are discharged directly, it will not only waste a large amount of sulfur resources, but also cause pollution and damage to the ecological environment, which seriously restricts the sustainable development of the industry. As people become more and more aware of natural environment protection, the state also attaches great importance to the control of petrochemical and coalific...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/04B01D47/06B01D53/00F23J15/08
CPCB01D47/06B01D53/002B01D53/04B01D2253/102B01D2257/302B01D2257/304B01D2258/0283F23J15/08Y02P70/10
Inventor 赵谷风赵振华
Owner 安徽皖华环保设备科技有限公司
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