Purification and recovery system for pressure relief exhaust gas of feeding airtight tank of top of blast furnace

Abstract

The invention discloses a purification and recovery system for pressure relief exhaust gas of a feeding airtight tank of the top of a blast furnace. The system is used for solving the problem in the prior art that the pressure relief exhaust gas is not purified and recovered. The system comprises a gas dust collecting device, wherein a gas-to-be-dedusted input end of the gas dust collecting deviceis used for being connected with a pressure relief exhaust gas output channel of the airtight tank, a dedusted gas output end of the gas dust collecting device is used for being connected with a low-pressure gas conveying channel in a blast furnace gas discharging path connected with a blast furnace body, and pressure difference, which is used for driving the pressure relief exhaust gas of the airtight tank to flow into the low-pressure gas conveying channel from the pressure relief exhaust gas output channel through the gas dust collecting device, is present between the pressure relief exhaust gas output channel and the low-pressure gas conveying channel. According to the system, the purification and recovery of the pressure relief exhaust gas can be achieved in a simple, effective and low-cost mode.

Description

technical field [0001] The invention relates to the control of local air pollution sources in a blast furnace system, in particular to a blast furnace top feeding airtight box pressure relief exhaust purification recovery system. Background technique [0002] During the operation of the blast furnace, it is necessary to periodically deliver materials for smelting to the furnace body (that is, feed). Due to the continuous generation of blast furnace gas during the blast furnace smelting process, a high-pressure environment is formed in the furnace body. In order to realize material feeding, a feeding airtight box is installed on the top of the blast furnace. The materials to be delivered are first placed in the airtight box, and then closed. Inflate the airtight box and inflate it so that the inside reaches the pressure balance with the blast furnace body, and then open the feeding output channel at the bottom of the airtight box to discharge the material into the furnace bod...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a blast furnace roof feeding airtight box pressure relief exhaust gas purification recovery system to solve the problem in the prior art that the pressure relief exhaust gas is not purified and recovered

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