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Functional characteristics and working principle of high-efficiency acid mist purification tower

Views: 4     Author: China xicheng     Publish Time: 2021-05-19      Origin: China xicheng

Features of high-efficiency acid mist purification tower:

1. It is applicable to the exhaust gas and sulfur oxide (SOx), sulfuric acid, nitric acid, hydrochloric acid, hydrofluoric acid, etc. discharged from the production process of industrial sectors such as chemical industry, light industry, printing and dyeing, medicine, steel, machinery, electronics, appearance, electroplating, etc. Nitrogen oxides (NOx), carbon oxides (CO, CO2), cyanide (HCN) and other acid gases, using SST series purification equipment, can all get satisfactory results.

2. High purification power SST series purification tower adopts two-stage reverse spraying, and the specific surface area of the filler is large. The gas-liquid ratio confirmed by the experimental research ensures stable function, and the purification power of various concentrations of acidic waste gas can reach 85%~95 %.

3. Low equipment resistance. On the basis of ensuring sufficient gas-liquid touch area, the SST series purification tower selects the packing type and structure with the best aerodynamic characteristics so that the equipment resistance does not exceed 40 mm water column under the additional air volume. It is a variety of domestic packing materials. The one with the lowest resistance in the absorption tower. This is exceptionally advantageous for the use of corrosion-resistant low-pressure fans.

4. Small footprint SST series purification tower combines the tower body, absorption tank, circulating pump, and absorption fluid pipeline system into a complete set of equipment. It has a compact structure and is convenient for on-site installation and operation. It has a small footprint, regardless of whether it is newly built. Projects can still be used as technological transformation projects.

Functional operating principle of high-efficiency acid mist purification tower:

 SST series acid gas purification tower is a two-phase countercurrent flow packing absorption tower. The acid gas enters the purification tower tangentially from the air inlet below the tower body. Under the powerful effect of the fan, it quickly fills the air inlet space and then evenly rises through the flow equalizing section to the first stage packing absorption section. On the surface of the filler, the acidic substances in the gas phase and the alkaline substances in the liquid phase produce a chemical reaction, and the reaction-generated substances (mostly soluble acids) flow into the lower storage tank with the absorption liquid. The incompletely absorbed acid gas continues to rise into the first-stage spray section. In the spray section, the absorbing liquid is sprayed from the evenly distributed nozzles at high speed, forming many fine mist droplets mixed with the gas and continuously producing chemical reactions. Then the acid gas rises to the secondary packing section, and the spray section carries on with the first Similar to the absorption process. The second and second stages have different nozzle densities, different spray pressure, and different acid gas concentration scales. The process of two-phase contact in the spray section and the packing team is also a heat and mass transfer process. By controlling the flow rate and staying time of the empty tower, the fullness and stability of this process are ensured. The uppermost part of the tower is the defogging section. The mist droplets of the absorption liquid trapped in the gas are removed, and the treated clean air is discharged into the atmosphere from the exhaust pipe at the upper end of the purification tower.

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