Flame-proof anti-explosion anticorrosion bag type dust-removing device for drying brown coal

Abstract

The invention provides a flame-proof anti-explosion anticorrosion bag type dust-removing device for drying brown coal. The device is characterized by explosion preventing and explosion releasing resistance, acid corrosion resistance, capability of preventing smoke spontaneous combustion, capabilities of eliminating air leakage and controlling oxygen volume, higher filtering load-bearing capacity, continuously working capability and high purifying precision. The device comprises a cylindrical box body and a tapered ash bucket, wherein the cylindrical box body is divided into an upper box body and a middle box body; the tapered ash bucket is located at the bottom of the middle box body; a smoke inlet is formed at a joint of a lower part of the middle box body and the tapered ash bucket; the device is characterized in that an explosion-releasing valve device is connected to the lower part of the middle box body and an outer wall of the middle box body; the explosion-releasing valve device comprises an explosion-releasing valve pipe section; one end of the pipe section is connected to the wall of the middle box body; the other end of the pipe section is connected to a lower clamper; one end of an upper clamper is connected to a counterweight explosion-releasing door; the upper clamper and the lower clamper are connected by a bolt; an explosion diaphragm is arranged between the upper clamper and the lower clamper; and a heat-insulating device is arranged on an outer surface of the tapered ash bucket.

Description

technical field [0001] The invention relates to purifying inflammable, explosive and low-temperature corrosive lignite flue gas in a negative pressure production system by using a bag-type dedusting device, in particular to a lignite drying, combustion-proof, explosion-proof, anti-corrosion bag-type dedusting device. Background technique [0002] Lignite has the characteristics of volatile, high water content, and high sulfur content. At present, the pulverized coal collection and flue gas purification devices used in domestic lignite drying basically include two types of electrostatic precipitator and bag filter. However, the "static electricity" of the electrostatic precipitator is one of the factors that cause the explosion of lignite, so its explosion-proof measures are strictly required, but often due to insufficient technical conditions and improper operation, it is easy to cause the explosion of the box, and the purification ability of the electrostatic precipitator fo...

AI Technical Summary

Problems solved by technology

However, the "static electricity" of the electrostatic precipitator is one of the factors that cause the explosion of lignite, so its explosion-proof measures are strictly required, but often due to insufficient technical conditions and improper operation, it is easy to cause the explosion of the box, and the purification ability of the electrostatic precipitator for flue gas is low. ;Because lignite has the characteristics of volatile, high water content and high sulfur content, it is flammable, explosive and easy to corrode at low temperature, so the equipment for processing dry lignite flue gas under negative pressure must have ① explosion-proof and explosion-proof; ② prevent acid corrosion; ③ Prevent the spontaneous combustion of flue gas; ④ eliminate air leakage and control the amount of oxygen; ⑤ have a high filtration load capacity and the ability to work continuously, while the conventional bag filter cannot meet these requirements

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