Blast furnace coal gas pressure reducing valve

Abstract

The invention relates to a blast furnace coal gas pressure reducing valve, which is used for a dry-method (wet method) dust removing system in the current ferrous metallurgy joint enterprises. The blast furnace coal gas pressure reducing valve comprises a valve body and a vale core, wherein the valve core is positioned in a cavity of the valve body; and flanges for connecting pipelines are respectively arranged at an inlet end and an outlet end of the valve body. The blast furnace coal gas pressure reducing valve is characterized in that the part close to the inlet end of the valve body on the valve body is an annular indent part; the valve core is a bipyramid; one end of the valve core is fixedly connected with one end of a first connecting rod; the other end part of the first connecting rod is hinged with one end part of a crankshaft of a crankshaft mechanism; one end of a rotating shaft of the crankshaft mechanism passes through a rotating shaft hole on the valve body and is positioned outside the valve body; the other end of the valve core is fixedly connected with one end of a sliding shaft; and the other end of the sliding shaft passes through a shaft sleeve which is positioned in the inlet end part of the valve body and is fixedly connected with the valve body through a supporting frame. The pressure reducing valve has the characteristics of noise reduction, pipeline vibration reduction and simple structure.

Description

technical field [0001] The invention relates to a blast furnace gas pressure reducing valve, which is used in the dry (wet) dust removal system of the blast furnace gas in the iron and steel metallurgical complex. Background technique [0002] At present, the technical characteristics of the blast furnace gas pressure reducing valve group are as follows: image 3 shown. [0003] Regardless of whether the blast furnace gas adopts the dry dust removal or wet dust removal process, when the TRT is not working, the static vane of the TRT is converted into a pressure reducing valve group to adjust and control the furnace top pressure. Because this system is safe and reliable, it has been used until now. [0004] However, the pressure reducing valve group adopted has the following defects: [0005] 1. Since the regulating element of the pressure reducing valve group is a valve plate, its air flow is not uniform, and when the high pressure gas is reduced to low pressure gas, the n...

AI Technical Summary

Problems solved by technology

[0005] 1. Since the regulating element of the pressure reducing valve group is a valve plate, its air flow is not uniform, and when the high pressure gas is reduced to low pressure gas, the noise generated is quite large;

[0006] 2. Due to the large disturbance of the air flow, the vibration of the pipeline is large;

[0007] 3. When the semi-static gas is released, the wear of the pressure reducing valve group is large, and its leakage rate increases, thus reducing the power generation of TRT;

[0008] At present, in order to solve the noise of the pressure reducing valve group (adding sound insulation cover and muffler and wrapping the noise-absorbing material outside the pipeline) and pipeline vibration, the company has invested a lot of money, and the effect of noise reduction is not good.

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