Ejection regeneration type coal gas desulfuration system waste gas emission reduction process
A technology of desulfurization system and process method, which is applied in the field of waste gas emission reduction of coal gas desulfurization system with injection regeneration method, which can solve the problems of loss of ammonia gas, easy blockage of pipes, pollution of ambient air, etc., to reduce pollution, prevent blockage of pipes, and improve desulfurization effect Effect
Inactive Publication Date: 2011-01-05
鞍钢集团工程技术有限公司
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Problems solved by technology
[0006] Since an injection regeneration device is usually equipped with a few or as many as dozens of injectors, it is difficult to systematically control the ratio of the air sucked by each injector to the exhaust gas according to the requirements of the production conditions, that is, it is difficult It can not only ensure the desulfurization efficiency but also reduce the emission of waste gas after desulfurization liquid regeneration as much as possible
The exhaust gas from the self-priming jet regeneration tank is discharged into the atmosphere without washing, which not only loses the ammonia gas that should be recycled, but also pollutes the ambient atmosphere with ammonia gas or entrained sulfur foam, and is also easy to block and connect to the jet. Pipeline of regenerative exhaust gas suction port of device 2
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[0022] The present invention will be described in further detail below through several specific embodiments in conjunction with the accompanying drawings.
[0023] Such as figure 2 Shown:
[0024] The desulfurized rich liquid 1 is sent to the injection regenerator 2 through the circulating pump of the desulfurized liquid, and the external regeneration air or oxygen-enriched air and other oxygen-containing gas 6 and the regenerated waste gas 5 are passed through. The oxygen-containing gas can be adjusted between 0 and 100%. The regulating valve 10 for the mixing ratio of the regenerated exhaust gas enters the oxygen-containing gas main pipe 11 for regeneration according to the mixed gas meeting the requirements of desulfurization efficiency or production conditions. Oxygen-containing gas inlet for each injector 2.
[0025] In order to reduce the ammonia or entrained sulfur foam in the exhaust gas, prevent pipeline blockage, and reduce environmental pollution, the present inv...
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The invention discloses an ejection regeneration type coal gas desulfuration system waste gas emission reduction process and belongs to the technical field of desulfuration. The process comprises: in front of an oxygen-containing gas entrance of an ejector of a spontaneos-suction ejection regeneration tank, controlling the mixing ratio of the oxygen-containing gas to a desulfured regeneration waste gas by using the regulating valve laid in a connected header pipe; washing the desulfured regeneration waste gas by using a gas washing device at a regeneration waste gas exhaust port on the top of the spontaneos-suction ejection regeneration tank; utilizing oxygen-containing regeneration gas in a cascaded manner in the multi-stage desulfuration device; adjusting the pressure of emitted regeneration waste gas and emitting the emitted regeneration waste gas to a coal gas pipe before or behind the desulfuration device; and the oxygen-containing gas may be oxygen. When the process is adopted, the ammonia or carried sulfur foam in the regeneration waste gas can be recovered and the emission of the tail gas of the regeneration is reduced or eliminated, so the desulfuration effect can be improved and the pollution to the atmosphere can be reduced.
Description
technical field [0001] The invention belongs to the technical field of desulfurization, and relates to a process method for reducing and regenerating exhaust gas from a coal gas desulfurization device using ammonia as an alkali source, in particular to a process method for reducing exhaust gas emission of a coal gas desulfurization system in a spray regeneration mode. Background technique [0002] The gas desulfurization process is carried out by the liquid-phase catalytic oxidation method using ammonia as the alkali source, and the regeneration tower or self-priming injection regeneration tank is mostly used for the regeneration of the desulfurization liquid. [0003] The eductors of self-priming jet regenerators usually have an air inlet. At present, there is a technology to open another regenerative waste gas suction port on the basis of the original air suction port of the injector. [0004] Such as figure 1 As shown, the desulfurization rich liquid 1 is pumped to the ...
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IPC IPC(8): B01D53/48B01D53/96C10K1/34
Inventor 马中全王波王淑玲
Owner 鞍钢集团工程技术有限公司