Smoke dust treatment method

Abstract

The invention discloses a smoke dust treatment method. The smoke dust treatment method comprises the following specific steps that (1) smoke dust runs along a preset channel in a negative pressure airdraft mode; (2) high-pressure spraying is performedthrough a spraying head to enable the smoke dust and water to be mixed for the first time; (3) the smoke dust continues to pass through a water-vapor mixing device to realize gas-liquid mixing; (4) the water vapor is mixed again through secondary high-pressure spraying of the spraying head; (5) the smoke dust continues to run along the preset channel, and part of large particles settle under the action of gravity; (6) steam and water in the smoke dust are separated in a physical water removal mode; (7) steam and water in the smoke dust are separated in a power water removal mode; and (8)a dust removal deviceis used for removing dust from the residual gas after two times of water removal and separation. The method has the beneficial effects that the safety accident hidden danger is reduced by combining dry and wet filtering; waste gas is directionally separated through multi-stage filtering, and certain economic benefits are achieved;99% of water vapor in the smoke dust is removed by combining physical water removal and dynamic water removal, the service life of the filter cartridge is prolonged, the cost is saved, meanwhile, theeffectiveness of high-standard purification is guaranteed, and the emission concentration after equipment treatment can reach 10 mg / m < 3 > (actual measurement), and the filtering efficiency exceeds 99.5%.

Description

technical field [0001] The invention relates to the technical field of smoke and dust waste gas treatment, in particular to a method for removing dust from smoke and dust waste gas in metal processing. Background technique [0002] With the in-depth development of the environmental protection and dust removal industry, the market demand for environmental protection equipment is constantly changing, and the requirements for high efficiency, stable output, safer and sustainable environmental protection equipment are put forward. Existing metal processing (such as cutting, welding, grinding, sandblasting, shot blasting, etc.), mixing, painting and other processes, the smoke and dust exhaust gas generated is often accompanied by high temperature, high humidity, high concentration problems, and it is difficult to deal with . [0003] The publication number is CN108786340A, a high-temperature flue gas dedusting method in which physical condensation is used to achieve the effect o...

AI Technical Summary

Problems solved by technology

Existing metal processing (such as cutting, welding, grinding, sandblasting, shot blasting, etc.), mixing, painting and other processes, the smoke and dust exhaust gas generated is often accompanied by high temperature, high humidity, high concentration problems, and it is difficult to deal with

[0003] The publication number is CN108786340A, a high-temperature flue gas dedusting method in which physical condensation is used to achieve the effect of soot demisting. This dewatering method will cause excessive humidity in the discharged gas due to incomplete water treatment, which will easily cause secondary pollution. And after the smoke and dust are demistered, there are still fine particles of smoke and dust, and the dust removal effect is limited