Gas curtain control type flue dust collecting apparatus

Abstract

The present invention discloses a gas curtain control type flue dust collecting apparatus, which comprises a gas nozzle, a bracket for installing the gas nozzle, a baffle, a wind box, a bracket for installing the wind box, a gas inlet pipeline and a gas discharge pipeline, wherein the gas nozzle and the wind box are respectively arranged on both sides of a zinc pot, the gas inlet end of the gas nozzle is connected with the gas inlet pipeline, the wind outlet of the gas nozzle presents a slit shape, the direction angle and the installation height of the wind outlet can be adjusted, the wind inlet of the wind box is a mesh separation plate, through holes are distributed on the separation plate, the through hole distribution density is affected by the work-piece immersion plating inclination angle, the wind discharge port of the wind box is connected with the gas discharge pipeline and a flue dust treatment device, the baffle is arranged on the end portion of the zinc pot, and the length of the baffle and the width of the zinc pot are the same. According to the present invention, the apparatus is suitable for collection of the acid mist in the acid washing groove in the hot immersion plating process acid washing process when the assembled components of the apparatus are made from the acid resistance and alkali resistance materials; and the apparatus has characteristics of simple structure, easy installation, good flue dust or acid mist collection effect, and low operating energy consumption.

Description

technical field [0001] The invention relates to an air curtain control type smoke dust collection device, more specifically, the invention relates to a smoke dust collection device used in batch hot-dip galvanizing process dipping process. Background technique [0002] During the hot-dip galvanizing process, a protective zinc chloride-ammonium salt film is formed on the surface of the workpiece after the assisted plating treatment. Because the decomposition temperature of ammonium chloride in the salt film is low, it is much lower than the conventional hot-dip galvanizing temperature 450°C. Therefore, during immersion plating, ammonium chloride is heated and decomposed to form ammonia gas and hydrogen chloride gas. These two gases combine to form micron-scale or nano-scale crystal particles above the zinc bath, generating a large amount of smoke and dust, which seriously affects the operating environment of workers and the surrounding ecology. Therefore, Research on the con...

AI Technical Summary

Problems solved by technology

After the workpiece enters the cover body, the retractable doors at both ends of the cover body are closed, and then the air is ventilated to remove dust; its advantages are simple structure and convenient operation, but it is difficult to remove slag and ash, and it is difficult to seal the upper part of the cover body. Blocked, it is difficult to guarantee the quality of plated parts

Chinese patent (patent number: ZL200920111934.7) discloses a blowing-suction exhaust gas collection device for hot-dip galvanizing, which is mainly composed of variable-section blowing ducts and equal-section suction ducts distributed on both sides of the zinc pot. The air blown out from the blower port can control the rise of smoke and dust, which is beneficial to improve the smoke and dust absorption rate of the suction port; but its disadvantage is that the suction duct with equal cross-section is difficult to completely absorb the divergent smoke and dust airflow, which is easy to cause smoke running and leakage

Chinese patent (patent number: ZL201320702057.7) discloses a dust collection device, which adopts two centrifugal fans distributed on both sides of the zinc pot, and uses strong air to draw away the dust above the zinc bath; its disadvantage is that it needs High-power ventilation, high energy consumption, large loss of heat capacity of the zinc bath, easy to cause galvanizing to stagnate and wait for the temperature to rise, and eventually lead to an unbearable increase in the cost of galvanizing

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