A deep dust and mist removal device

Abstract

The invention discloses an advanced dust-removing and demisting device, and particularly relates to a dust-removing and demisting device which is suitable for saturated flue gas containing a great deal of fog drops. The advanced dust-removing and demisting device has a main working principle as follows: collision among fog drop liquid particles and between fog drop liquid particles and dust particles can be realized during high-speed motion of flue gas based on the characteristic that the flue gas contains a great deal of fog drops and liquid drops, so that larger particles are formed by agglomeration and then settle; the fog drop liquid particles and the dust solid particles are in full contact with a liquid-containing layer in the device, and then separation is realized by liquid trap; the fog drop liquid particles and the dust solid particles rotate at high speed along with the flue gas, centrifugal separation is realized by virtue of the density difference between the fog drop liquid particles and the flue gas as well as between the dust particles and the flue gas, and then the fog drop liquid particles and the dust solid particles are thrown onto the surface of the inner wall of the device and are removed after contacting a liquid film layer attached onto the wall surface of the device. The advanced dust-removing and demisting device has the advantages that efficient dust removing and demisting can be realized under the conditions of low running cost and investment cost; the device is simple and reliable in structure and free of a risk of blocking, and is also portable and safe.

Description

technical field [0001] The invention relates to a deep dedusting and demisting device, in particular to a deep dedusting and demisting device suitable for saturated flue gas containing a large number of mist droplets. Background technique [0002] Dust removal and demisting of flue gas are the most common process sections in the flue gas purification process. There are various process routes, but for saturated wet flue gas containing a large number of mist droplets, dust removal and mist removal can be realized at the same time, especially high-efficiency deep dust removal and mist removal There are relatively few optional technical process routes and process equipment. The typical saturated wet flue gas containing a large number of mist droplets that needs to be dedusted and demisted is the clean flue gas that adopts the wet desulfurization process. [0003] At present, more than 95% of the flue gas of the existing large-scale coal-fired boilers in China adopts the wet des...

AI Technical Summary

Problems solved by technology

In addition, the "fog eliminator + wet electrostatic precipitator" process uses a high-voltage electric field to capture fog droplets and dust particles. There are many high-voltage electrical equipment in the equipment, and the electrode wires are made of high-grade alloy materials. The construction cost is high and the power consumption for operation is high. It is also one of the reasons that limit its application

[0007] The main reason why it is difficult to upgrade the process route of "mist eliminator + wet electrostatic precipitator" on the desulfurization tower of the built project is that the weight and volume of the equipment are huge, and the structural design strength of the original absorption tower cannot meet the load requirements of the electrostatic precipitator. ; The demand for site area also limits the possibility of its external layout when adjacently arranged, coupled with the huge increase in running resistance when adjacently arranged, resulting in a further increase in the operating cost of the "mist eliminator + wet electrostatic precipitator" process route

[0008] Due to a large number of high-voltage electrical equipment, the operation and maintenance of the "mist eliminator + wet electrostatic precipitator" process route is complicated, the technical requirements for operation are high, and the operation and maintenance costs are relatively high

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