A purification system combining dry method net and water column method

Abstract

The invention discloses a purification system combining dry net type and water column method, which is formed by connecting multistage dry net type dust collectors and water column method purifiers. The multi-stage dry-process screen dust collector includes a shell and a funnel arranged under the shell; the shell has a part of the dust removal air passage; several filter screen assemblies are installed in the dust removal air passage from front to back. The water column method purifier is composed of several purification boxes connected in sequence, and several water columns are arranged in the inner cavity, and the water flow falls on the water column to form a water curtain. The invention not only overcomes the respective defects of the existing dry method and wet method purification systems, but also combines the two to have the advantage of good purification effect.

Description

technical field [0001] The invention relates to a purification system, in particular to a purification system combining a dry net method and a water column method, and belongs to the field of purification equipment. Background technique [0002] The flue gas discharged from combustion devices such as boilers needs to be dedusted and purified through the purification system. In the prior art, there are mainly two methods for dust removal and purification of flue gas: dry method and wet method. [0003] The dry dust removal and purification device mainly uses a cloth bag for dust removal. The disadvantage is that the bag is prone to damage during the dust removal process. Once the bag is damaged, it needs to be shut down for inspection and maintenance, which is inconvenient and expensive to maintain. [0004] As a typical application of wet dust removal and purification in the prior art, the patent document with the publication number CN2358980 provides a water vapor column m...

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Problems solved by technology

[0003] Dry dust removal and purification devices mainly use cloth bags for dust removal. The disadvantages are: the bag dust removal process is prone to damage. Once damaged, it needs to be shut down for inspection and maintenance, which is inconvenient for maintenance and high maintenance costs.

[0004] As a typical application of wet dust removal and purification in the prior art, the patent document with the publication number CN2358980 provides a water vapor column method backwater closed type purifier, and its defects are: (1) when dealing with the flue gas discharged from a large boiler , it is necessary to increase the height of the purifier so that the flue gas can quickly release the pressure after entering the purifier. However, the heightened purifier must lengthen the vertical steel column, which is difficult to process and poor in workmanship; (2) the flue gas and The contact area between the water on the surface of the steel column is small, and the purification effect is not ideal; (3) In the actual application process of this scheme, the main material is steel, which is easily corroded by acidic water and cannot be used for a long time

[0005] It can be seen that the dust removal and purification methods of dry and wet methods in the prior art have defects respectively

Moreover, the new national environmental protection gas emission standard, which will be implemented in 2017, clearly requires that the dust content should be less than 10mg / m 3 , SO 2 Content below 50mg / m 3 , NO content below 100mg / m 3 , the existing single dust removal and purification system cannot meet the emission requirements of the new standard

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