Process of dual-circulation single-tower desulfurization systems
A desulfurization system and desulfurization process technology, which is applied in the separation of dispersed particles, chemical instruments and methods, combined devices, etc., can solve the problems of unfavorable efficient and economical operation, land occupation in series, large investment, and high desulfurization towers, so as to reduce the circulating volume of slurry. , the effect of saving investment and reducing land occupation
Active Publication Date: 2015-04-22
CPI YUANDA ENVIRONMENTAL PROTECTION ENG
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For some high-sulfur coal areas, the desulfurization efficiency is required to reach more than 98%, or even more than 99% to meet the emission requirements. To meet the emission requirements using a single-cycle desulfurization tower system, the desulfurization tower will be very high, and the energy consumption is relatively high. Sometimes It is necessary to divide one desulfurization tower into two desulfurization towers to operate in series, but the two desulfurization towers in series occupy an area and the investment is very large, which is not conducive to efficient and economical operation
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[0020] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
[0021] figure 1 It is a structural schematic diagram of the present invention, as shown in the figure, the double-cycle single-tower desulfurization system of the present invention includes a desulfurization tower 1, the lower part of the desulfurization tower 1 is provided with a flue gas inlet 2, and the upper part is provided with a flue gas outlet 3. The bottom of the desulfurization tower 1 is provided with a lower circulation neutralization oxidation pond 4 and an upper circulation neutralization oxidation pond 5, and the upper circulation neutralization oxidation pond 5 communicates with the lower circulation neutralization oxidation pond 4 through an overflow port; the inside of the desulfurization tower 1 Between the flue gas inlet 2 and the flue gas outlet 3, a lower circulation desulfurization zone 6, a liquid accumulation tra...
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The invention discloses dual-circulation single-tower desulfurization systems and a process thereof. A liquid collecting disc arranged in a desulfurization tower divides a desulfurization area into an upper circulation desulfurization area and a lower circulation desulfurization area. The lower circulation desulfurization area, a lower circulation neutralization oxidation pond and a lower circulation pump altogether form a lower circulation desulfurization system. The upper circulation desulfurization area, an upper circulation neutralization oxidation pond and an upper circulation pump altogether form an upper circulation desulfurization system. The dual-circulation desulfurization systems which are relatively independent are formed in the desulfurization tower, and desulfurization of flue gas is completed by the two dual-circulation desulfurization systems together. The dual-circulation single-tower desulfurization systems which operate relatively independently are arranged within one desulfurization tower, so that high desulfurization efficiency is guaranteed, and the slurry circulation amount and the system power consumption are reduced, besides, the integral arrangement of the single tower reduces the occupied area and saves investment. The dual-circulation single-tower desulfurization systems are particularly applicable to desulfurization of flue gas produced by burning high sulfur coal, and the desulfurization efficiency can achieve more than 99%.
Description
technical field [0001] The invention relates to a flue gas desulfurization technology, in particular to a double-cycle single-tower desulfurization system and process. Background technique [0002] The SO 2 The emission limit has been greatly improved, and the general requirement is 100mg / Nm 3 Within, local places require 50mg / Nm 3 . [0003] The current single-cycle desulfurization tower system is mainly operated in medium and low-sulfur coal areas, which can fully meet the emission requirements. For some high-sulfur coal areas, the desulfurization efficiency is required to reach more than 98%, or even more than 99% to meet the emission requirements. To meet the emission requirements using a single-cycle desulfurization tower system, the desulfurization tower will be very high, and the energy consumption is relatively high. Sometimes One desulfurization tower has to be divided into two desulfurization towers to operate in series, but the two desulfurization towers in se...
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IPC IPC(8): B01D53/80B01D53/50B01D50/00
Inventor 唐小健
Owner CPI YUANDA ENVIRONMENTAL PROTECTION ENG