Blast furnace gas impulse blowing purification dust removal system adapted for multiple volumes

Abstract

The invention relates to a pulse bellowing, purifying and dedusting system which can be used in a blast furnace with a variety of capacities in the field of environmental-protection equipment. The invention comprises a pulse bellowing bag-type dust collector, a crude gas pipeline, a purified gas pipeline and a dust transmission pipeline. A purified gas-pressurized backblowing device and an automatic control system can be connected with the crude gas pipeline by pipelines. The crude gas pipeline is connected with the inlet of the pulse bellowing bag-type dust collector; and the purified gas pipeline is connected with the outlet of the pulse bellowing bag-type dust collector. The dust transmission pipeline is connected with the dust outlet of the pulse bellowing bag-type dust collector. The outlet of the purified gas-pressurized backblowing device can be connected with the pulse bellowing bag-type dust collector by pipelines; and the automatic control system can be connected with pulse bellowing bag-type dust collector by signal circuits. The invention can be used when the temperature is about 250 DEG C and can avoid heat waste and secondary pollution. And when factories have no nitrogen gas source, the invention can use the purified gas-pressurized backblowing device to dedust. In addition, the invention has two dust transmission manners which are machinery dust transmission and pneumatic dust transmission.

Description

technical field [0001] The invention relates to a purification and dust removal system used in the technical field of environmental protection equipment, in particular, a blast furnace gas pulse injection purification and dust removal system suitable for various volumes. Background technique [0002] Existing blast furnace outlet gas temperature is as high as 100~300℃, and the dust concentration is as high as ten grams per cubic meter. In the past, the wet method was used to purify the gas, and the dust concentration of the gas after wet purification was as high as several hundred milligrams per cubic meter. The post-use is very unfavorable; the gas temperature drops below 100°C after wet purification, resulting in waste of heat energy; the dust collected by wet purification is in a mud state, which cannot be used and causes secondary pollution. [0003] After searching the existing technical literature, it was found that Gao Luping wrote "Purification of Blast Furnace Gas w...

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Problems solved by technology

[0004] The purpose of the present invention is to address the deficiencies and defects of the prior art, and provide a blast furnace gas pulse injection purification and dust removal system suitable for various volumes, so that it can be used at a temperature of about 260 ° C, avoiding waste of heat energy and secondary pollution , Improve gas quality, can be used in factories with or without nitrogen gas source, and can adopt different ash conveying methods

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