System and method for desulphurizing waste gas by cyclic absorption and application thereof
A technology of waste gas desulfurization and absorption method, which is applied in separation methods, chemical instruments and methods, and dispersed particle separation, etc., can solve the problems of affecting desulfurization effect, large steam consumption, and increase energy consumption, so as to reduce desulfurization operation costs and avoid The effect of environmental pollution and energy saving
Active Publication Date: 2012-06-27
PANGANG GROUP RESEARCH INSTITUTE CO LTD +2
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Problems solved by technology
However, this process technology has two important defects: 1) The steam consumption required for the desulfurization liquid cycle regeneration is relatively large, resulting in high desulfurization costs and affecting the market competitiveness of the process technology; 2) The temperature of the purified gas after desulfurization Below the dew point temperature, it needs to be reheated above the dew point temperature before it can be discharged through the chimney, which will increase a lot of energy consumption
[0005] However, during the operation of this method, since the exhaust gas with a higher temperature used to increase the temperature of the flue gas in this method has not been desulfurized, it will cause pollutants (especially SO 2 ) will seriously affect the desulfurization effect
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[0022] Hereinafter, the schematic diagram of the waste gas desulfurization system and method according to the circulation absorption method according to the present invention will be described in detail with reference to the accompanying drawings.
[0023] figure 1 It is a schematic diagram of the waste gas desulfurization system of the circulation absorption method according to the present invention. exist figure 1 In , the solid arrows indicate the liquid-phase material flow, and the dashed-line arrows indicate the gas-phase material flow.
[0024] refer to figure 1 , the waste gas desulfurization system according to the cyclic absorption method of the present invention mainly includes: a purified gas reheater 4, which is provided with a relatively high temperature non-desulfurized waste gas pipeline and a purified gas pipeline (not specifically shown in the figure), which are independent of each other, for using The higher-temperature non-desulfurized waste gas and the d...
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The invention discloses a system and a method for desulphurizing waste gas by cyclic absorption and application thereof. The system comprises a cooling scrubber, an absorbing tower, a lean-rich liquid heat exchanger, a desorbing tower and a reboiler. The system also comprises a purified gas reheater and a demister. The cooling scrubber, the absorbing tower and the demister are connected in sequence; the purified gas reheater is connected with the demister, the reboiler and the cooling scrubber to form a waste gas passage; the absorbing tower is connected with the desorbing tower through the lean-rich liquid heat exchanger to form a desulphurizing liquid loop; and the reboiler is connected with the desorbing tower to form a reboiling liquid and steam loop.
Description
technical field [0001] The present invention relates to an exhaust gas desulfurization system, method and application, in particular, the present invention relates to an exhaust gas desulfurization system, method and application using a cyclic absorption method. Background technique [0002] SO 2 And acid rain has great harm to crops, forests and human health, and is one of the three major environmental problems in the world today. Control SO 2 There are three ways of pollution: desulfurization before fuel combustion, desulfurization during fuel combustion, and exhaust gas desulfurization after combustion. Exhaust gas desulfurization is currently the most important and most effective way to control SO 2 Exhaust gas treatment methods. [0003] So far, more than 200 waste gas desulfurization technologies have been researched and developed, of which more than a dozen are used in large-scale commercial applications, such as calcium method, sodium method, magnesium method, amm...
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IPC IPC(8): B01D53/78B01D53/50
Inventor 黎建明邱正秋张金阳彭良虎王建山段蓉斌
Owner PANGANG GROUP RESEARCH INSTITUTE CO LTD