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Classification and selection criteria for wet dust collectors

Source: Official website   |   Date:2019-05-17

Wet dust collectorClassification:

(1) Classified by structural type:

(1) Water storage type: containing a certain amount of water. The high-speed impact of dust and gas forms water droplets, water films, and bubbles. Scour the dust, such as flushingImpulse dust collector, water bath dust collector, horizontal swirl water film dust collectorWait.

(2) Pressurized water spray type: provide pressurized water to the dust remover, and use spray or spray to generate water droplets to clean the dusty gas, such as Venturi tube dust remover, foam dust remover, packing tower, turbulence tower, etc.

(3) Forced rotation of spray: through mechanical force, rotation of spray or rotating blades, water drops, water films, bubbles are formed in water supply, and dust laden gases are cleaned. For example, rotating spray dust collector.

(2) According to energy consumption, it can be divided into:

(1) Low energy consumption type: With a resistance below 4000Pa, the dust removal efficiency can reach 90%. This type of dust collector includes spray type, water bath type, pulse type, foam type,Cyclone water film dust collector.

(2) High energy consumption type: resistance greater than 4000pa, high efficiency of fine dust, mainly Venturi tube dust collector.

The structure of wet dust collectors: Although there are significant differences in the structure of different types of wet dust collectors, they are generally composed of a suction device, a water intake device, a water gas contact body, a droplet separator, and a sewage (mud) discharge device.

(3) According to the gas-liquid contact method, it can be divided into:

(1) Overall contact: flush the dusty airflow into the liquid, such as self-excited, cyclone water film, foam, etc.

(2) Decentralized contact type: when sprayed into the dusty airflow, dust particles collide with water droplets and liquid film, such as venturi, spray tower, etc.

The selection of wet scrubbers is based on:

1. Operational flexibility. Any operating equipment should consider its load, the impact on capture efficiency when the gas flow rate exceeds or falls below the design value, and how to operate when the dust concentration is unstable or continuously exceeds the design value.

2. Corrosiveness. When purifying corrosive gases, anti-corrosion measures should be considered.

3. Hydrophobicity. The purification effect of wet dust collectors on hydrophobic dust is not high, and they are generally not suitable for operation at the design value.

4. Dust removal efficiency. The high efficiency performance of wet dust collectors is one of the important performance indicators for selection. Under certain gas flow conditions, specific dust pollutants have a direct impact on the capture efficiency of gases.

5. Operation and maintenance. In general, moving or rotating components inside the dust collector should be avoided, and attention should be paid to blockages caused by airflow passing through the small cross-section of the impeller.

6. AdhesionWet dust collectorIt can purify sticky dust, but cleaning and cleaning should be considered to prevent blockage.

7. Mud treatment. The mud treatment of wet foot dust collectors must encounter problems and efforts should be made to reduce the degree of pollution.

8. Water consumption. The consumption of dust collecting water and the treatment of sewage discharge, as well as winter anti freezing measures for water

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