Purification system with dry-method net type and water column method combined

Abstract

The invention discloses a purification system with a dry-method net type and a water column method combined. The system is formed by connecting a multi-level dry-method net type deduster and a water column method purifier. The multi-level dry-method net type deduster comprises a shell and a funnel arranged below the shell; the shell is internally provided with a dedusting air channel part; a dedusting air channel is internally provided with multiple filter screen assemblies in sequence from front to back. The water column method purifier is composed of purification boxes which are connected in sequence. An inner cavity is internally provided with multiple water columns. Water flow falls on the water columns to form a water curtain. By means of the purification system, defects of an existing dry-method purification system and defects of an existing wet-method purification system are overcome; the existing dry-method purification system is combined with the existing wet-method purification system, and the purification system has the advantage of being good in 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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