A dry dust removal evaporative cooler, dust removal system and dust removal process

Abstract

The application provides a dry dust removal evaporative cooler, a dust removal system and a dust removal process. The dry dedusting evaporative cooler includes an evaporative cooler body and a spray gun, wherein the spray gun is arranged around the evaporative cooler body, and the spray gun located in the semicircle area inside the airflow and the spray gun located in the semicircle area outside the airflow are deflected at a certain angle in the vertical direction, At the same time, the extension length of the spray gun is controlled, so that the evaporative cooler has a good cooling effect. Through the size design of the evaporative cooler, the design of the installation position and the design of the connection method, the whole set of dust removal system is compact in structure, and can effectively solve the problem of OG method transformation. Adaptability problems encountered in the coming LT dry dust removal system. The cascade PID control system is adopted to automatically control the temperature of the evaporative cooler and the flow rate of the cooling medium, which reduces the condensation of coarse dust in the flue gas and improves the automation of dust removal.

Description

technical field [0001] The application relates to the field of metallurgical equipment, specifically, to a dry dust removal evaporative cooler, a dust removal system and a dust removal process. Background technique [0002] A large amount of flue gas will be produced in the process of converter steelmaking, which contains soot, CO, etc. If it is directly discharged into the atmosphere, it will cause serious pollution to the environment. Therefore, a dust removal and absorption system must be designed to treat the generated flue gas . For dust removal, converter dust removal generally includes wet dust removal (OG method Oxygen Converter Gas Recovery System) and LT (Lurgi-Thyssen) dry dust removal. The advantage of the OG method is that the equipment is simple and the cost is low, but its automation level is low, the water consumption is large, and the dust removal effect is general, and the dust emission concentration is about 100mg / Nm 3 . The LT dry method has the charac...

AI Technical Summary

Problems solved by technology

If the spray water from the nozzle inside the evaporative cooler is uneven, or the humidity of the flue gas is too high, or the body design of the evaporative cooler is unreasonable, etc., it will cause the dust in the flue gas (Fe2O3, FeO, CaO, SiO2 and complex compounds, etc.) Water sticks together and adheres to the walls of the evaporative cooler, causing scaling on the walls

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