Flue gas desulfurization, purification and recovery process for flue gas desulfurization column

Abstract

The invention discloses a flue gas desulfurization, purification and recovery process for a flue gas desulfurization column. The desulfurizing column comprises a column body, a smoke inlet, a heat exchanger, a refrigerant inlet, a refrigerant outlet, a first filter screen, an air blower, a gas absorption tank, a circulating liquid tank, a guide pipe, a circulating pump, a second filter screen, a third filter screen, a fourth filter screen, a spraying layer, a demister and a smoke outlet; compared with a traditional flue gas desulfurization, purification and recovery process for a desulfurization column. The adsorbent is contacted with a liquid adsorbent, and then is contacted with an atomized adsorbent. Almost all sulfur-containing substances in the flue gas are removed; the use of the circulating liquid pool recycles the adsorbent which is not reacted in the spraying layer and the water generated by the reaction, and the use of multiple filtering processes and the modified ABS synthetic resin guide pipe prolongs the service life of the equipment, reduces the maintenance frequency of the desulfurization equipment, and has a good market application prospect.

Description

technical field [0001] The invention relates to a desulfurization process of a flue gas desulfurization tower, in particular to a flue gas desulfurization purification recovery process for a flue gas desulfurization tower. Background technique [0002] With the advancement of science and technology, the continuous development of modern industry, people's living conditions are getting higher and higher, environmental problems have gradually entered people's field of vision, and the smoke generated by industrial production has also become the focus of people's attention. A large number of sulfur substances in the smoke Into the atmosphere, it is absorbed by rainwater to form acid rain, causing serious environmental pollution and endangering people's health. Flue gas desulfurization has also become an urgent problem for people to solve. In the traditional flue gas desulfurization process, the flue gas is passed into the traditional The desulfurization tower is directly discharg...

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Problems solved by technology

[0002] With the advancement of science and technology, the continuous development of modern industry, people's living conditions are getting higher and higher, environmental problems have gradually entered people's field of vision, and the smoke generated by industrial production has also become the focus of people's attention. A large number of sulfur substances in the smoke Into the atmosphere, it is absorbed by rainwater to form acid rain, causing serious environmental pollution and endangering people's health. Flue gas desulfurization has also become an urgent problem for people to solve. In the traditional flue gas desulfurization process, the flue gas is passed into the traditional The desulfurization tower is directly discharged into the atmosphere after desulfurization. The traditional desulfurization tower is mostly wet desulfurization. During the desulfurization process, a large amount of adsorbent will be consumed, and a large amount of waste water will be generated during the desulfurization process. The resource consumption is large, and the desulfurization method is single. Simultaneous desulfurization Ineffective

[0003] Chinese invention patent CN108031265 discloses a flue gas desulfurization tower. The desulfurization tower passes the flue gas into the spray layer for primary desulfurization, passes through the demister, and then passes the flue gas into the desulfurization box for secondary desulfurization. After passing through the demister, the flue gas is discharged. Although the flue gas desulfurization tower recycles the adsorbent, the utilization rate is low. At the same time, a large amount of waste water will be generated during the desulfurization process, which increases the risk of environmental pollution. The desulfurization box cannot make the slurry and flue gas The desulfurization effect of the desulfurization tower is poor, and the desulfurization process of the desulfurization tower is relatively cumbersome, and the equipment manufacturing cost is high, so it is not suitable for wide application in the market

[0004] Chinese invention patent CN105413430A discloses a flue gas desulfurization tower, which only passes the flue gas into the spray layer for desulfurization once. The complete reaction generates solid precipitates, and at the same time, the tiny solid precipitates produced by a small part of the reaction will continue to rise with the flue gas, so that the exhausted flue gas contains a large amount of sulfur-containing substances, the desulfurization effect is poor, it does not meet the environmental protection requirements, and it is harmful to the environment. , not suitable for flue gas desulfurization purification recovery treatment process, the market prospect is poor

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