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Combined desulphurization deamination technology for coke oven gas

A coke oven gas and ammonia removal technology, which is applied in the petroleum industry, combustible gas purification, combustible gas purification/transformation, etc., can solve the problems of complex process, high equipment and operating costs, unsatisfactory economic efficiency, etc., and improve economic performance Effect

Active Publication Date: 2013-12-25
BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0007] In order to solve the coke oven gas treatment process in the prior art, it is not only necessary to set up two sets of processes for desulfurization and deamination, but also to set up a separate process for the preparation of desulfurizer. The whole process is relatively complicated, and the cost of equipment and operation is high. When treating coke oven gas with desulfurization method, when the ratio of ammonia to sulfur in coke oven gas is small, additional ammonia water needs to be supplemented, and its economic efficiency is not ideal. The present invention provides a method for desulfurizing coke oven gas, The preparation of ammonium sulfate and the preparation of desulfurizer are organically combined, and the coke oven gas combined desulfurization and deammoniation process with better economic performance

Method used

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  • Combined desulphurization deamination technology for coke oven gas
  • Combined desulphurization deamination technology for coke oven gas

Examples

Experimental program
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Effect test

Embodiment 1

[0037] The coke oven gas combined desulfurization and deamination process described in this embodiment is as follows: figure 1 shown, including:

[0038] (1) Pass the coke oven gas from the bottom into the desulfurization tower, the temperature of the desulfurization tower tank is 50°C; the top of the desulfurization tower injects desulfurizer through the nozzle to rinse the coke oven gas, and the desulfurization The agent is an amorphous iron oxyhydroxide slurry, and the concentration of the amorphous iron oxyhydroxide in the slurry is 15wt%.

[0039] (2) The desulfurized coke oven gas in step (1) overflows from the top of the desulfurization tower, and then passes the desulfurized coke oven gas into the ammonia absorption tower, and the coke oven gas and sulfurous acid sulfurous acid sprayed on the top of the ammonia absorption tower The iron solution reacts to remove the ammonia in the coke oven gas, and the temperature in the ammonia absorption tower still is controlled ...

Embodiment 2

[0043] The coke oven gas combined desulfurization and deamination process described in this embodiment is as follows: figure 2 shown, including:

[0044] (1) Pass the coke oven gas from the bottom into the desulfurization tower, the temperature of the desulfurization tower tank is 40°C; the top of the desulfurization tower injects desulfurizer through the nozzle to rinse the coke oven gas, and the desulfurization The agent is an amorphous iron oxyhydroxide slurry, and the concentration of iron oxyhydroxide in the slurry is 15wt%.

[0045] (2) The desulfurized coke oven gas in step (1) overflows from the top of the desulfurization tower, and then passes the desulfurized coke oven gas into the ammonia absorption tower, and the coke oven gas and sulfurous acid sulfurous acid sprayed on the top of the ammonia absorption tower The iron solution is reacted to remove the ammonia in the coke oven gas, the temperature in the ammonia absorption tower still is controlled to be 20°C, th...

Embodiment 3

[0050] The coke oven gas combined desulfurization and deamination process described in this embodiment is as follows: figure 2 shown, including:

[0051] (1) Pass the coke oven gas from the bottom into the desulfurization tower, the temperature of the tower kettle of the desulfurization tower is 45°C; the top of the desulfurization tower sprays the desulfurizer through the nozzle to rinse the coke oven gas, and the desulfurization The agent is an amorphous iron oxyhydroxide slurry, and the concentration of iron oxyhydroxide in the slurry is 13wt%.

[0052] (2) The desulfurized coke oven gas in step (1) overflows from the top of the desulfurization tower, and then passes the desulfurized coke oven gas into the ammonia absorption tower, and the coke oven gas and sulfurous acid sulfurous acid sprayed on the top of the ammonia absorption tower The iron solution is reacted to remove the ammonia in the coke oven gas, the temperature in the ammonia absorption tower still is control...

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Abstract

A provided combined desulphurization deamination technology for coke oven gas comprises: (1) utilizing FeOOH as a desulfurizer to perform desulphurization on the coke oven gas; (2) reacting desulphurized coke oven gas with a ferrous sulphate solution to removing nitrogen in the coke oven gas, controlling the temperature at 20-40 DEG C and a pH value of the solution at 5-9 during reaction, wherein a solution containing ammonium sulfate and fougerite is generated; (3) introducing an oxygen-containing gas into the solution containing ammonium sulfate and fougerite and generated in the step (2) to oxidize fougerite and generate FeOOH; and (4) filtering the oxidized solution and taking the filtered-out FeOOH as the desulfurizer in the step (1). According to the technology, desulphurization of the coke oven gas, preparation of ammonium sulfate and preparation of the desulfurizer are combined together, and the byproduct generated during preparation of ammonium sulfate in the field of desulphurization deamination of the coke oven gas is utilized and helps to realize preparation of the desulfurizer, so that the desulfurizer does not need buying additionally, and the technology is improved in economic performance.

Description

technical field [0001] The invention belongs to the field of gas purification, and in particular relates to a process for desulfurization and deammonization of coke oven gas. Background technique [0002] Coke oven gas is an important by-product produced in the coking process. Coke oven gas is a valuable fuel resource. However, during the coking process, about 30-35% of the sulfur in the raw coal will be converted into H 2 S and other sulfides, and HCN and NH contained in coke oven gas itself 3 Together, they constitute the toxic and harmful impurities in the gas, among which the alkaline gas NH 3 Very corrosive to pipeline equipment, acid gas H 2 In addition to being highly corrosive, S and HCN are also highly toxic, and when coke oven gas is used as fuel, H 2 S and its combustion product SO 2 Both are poisonous, so coke oven gas must be purified before being used as fuel, that is, deammonization and desulfurization of coke oven gas. [0003] The methods for treati...

Claims

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Application Information

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IPC IPC(8): C10K1/16C10K1/20
Inventor 林科刘振义王立贤
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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