Method for reducing SO2 emission in shutdown process of tail gas treatment device
A technology for tail gas treatment and SO2, which is applied in separation methods, chemical instruments and methods, and dispersed particle separation, etc., can solve the problems of prolonging the shutdown time of the factory, unfavorable maintenance and start-up work, and consumption of large desulfurization amine liquid, etc. The effect of low renovation cost and short renovation period
Pending Publication Date: 2021-10-08
PETROCHINA CO LTD
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Problems solved by technology
In this way, it is necessary to consume a large amount of desulfurization amine solution, and at the same time to absorb SO 2 There are certain risks in the recovery and storage of amine liquid after acid gas
In addition, after the shutdown of the sulfur recovery unit, the Consolv tail gas treatment unit will be shut down according to the shutdown steps, resulting in an excessively long shutdown time, prolonging the shutdown time of the entire plant, which is not conducive to subsequent maintenance and start-up work
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[0026] In order to make the objects, technical solutions, and advantages of the present invention, it will be described in connection with the examples and the accompanying drawings, and the schematic embodiments of the present invention and their description thereof are for explaining the present invention. As a result of the present invention.
[0027] Exhaust gas treatment processes of the prior art figure 1 Indicated. During normal operation of the exhaust gas treatment Kangsuo Fu: from 23 to sulfur recovery unit containing H2S, SO 2 , S and other sulfur-containing exhaust gas entering the exhaust gas incinerator 24, 22 through the fuel gas and the combustion air 21 emit a lot of heat, in the case where the temperature of 800 deg.] C, complete conversion of all sulfur compounds to a high temperature of SO 2The exhaust gas is reduced to 300 ° C, and the incoming tower 26 is transferred to the income tower 26 and the cooling water is further cooled to 70 ° C, and the cooling wat...
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The invention discloses a method for reducing SO2 emission of in a shutdown process of a tail gas treatment device, and particularly relates to a process for reducing SO2 emission in the shutdown process of a sulfur recovery device and a Consolv tail gas treatment device. According to the invention, SO2 in tail gas can be absorbed in the shutdown process of the tail gas treatment device only by additionally arranging simple pipelines and valves in an original system, an environment-friendly emission standard is met, transformation cost is low, a transformation period is short, and remarkable effect is obtained; meanwhile, operation of a cleaning and washing section in the technical scheme of the invention does not affect the shutdown process of the absorption and regeneration section; and the absorption and regeneration section and the sulfur recovery device are synchronously shutdown, and the shutdown time of the absorption regeneration section and the sulfur recovery device is coincident, so overall shutdown time is greatly shortened.
Description
Technical field [0001] The present invention relates to a gas purification plant or refineries SO 2 Reduction process, and particularly relates to a sulfur recovery tail gas treatment apparatus Kangsuo Fu during parking SO 2 Reduction process. Background technique [0002] With my country's increasing environmental requirements, "onshore oil and gas industry emission standards" has been published for natural gas purification plant sulfur recovery unit sulfur production scale will be 200 tons / day as a boundary, the exhaust gas SO 2 Emission limit concentration of 400mg / m3 or 800mg / m3, exhaust gas purification plant means SO 2 No longer perform the required emission regulations GB16297-1996 emission rate. Natural gas purification plant sulfur recovery or whether the implementation of the new standards of sulfur dioxide emission concentration limits in the parking process in the daily production process, in particular the sulfur recovery unit will face new and more stringent r...
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Login to View More IPC IPC(8): B01D53/78B01D53/50
CPCB01D53/502B01D2251/304B01D2251/604
Inventor 瞿杨岑嶺范锐彭子成黄朝齐雷婧雷恒罗东蒋吉强席红志
Owner PETROCHINA CO LTD