Coke oven bridge pipe raw gas pressure detection device

Abstract

The present invention relates to a coke oven bridge pipe raw gas pressure detection device. The device comprises a pressure tapping probe, a differential pressure transmitter and a nitrogen gas blowing system. The pressure tapping probe is installed on a coke oven bridge pipe, the pressure tapping of the pressure tapping probe is stretched into the coke oven bridge pipe, a front-end pressure tapping port is located in the ammonium hydroxide spraying range, and the pressure output end is connected with a first tee joint and a second tee joint in order; the other branch of the first tee joint is connected with a drain plug or maintenance; and one branch of the second tee joint is connected with the differential pressure transmitter though a 3-way ball valve, and the other branch of the second tee joint is connected with the nitrogen gas blowing system formed through the connection of a constant flow gas blowing device, a filtering reducing valve, a one-way valve, a ball valve for air supply and a nitrogen pipeline in order. The coke oven bridge pipe raw gas pressure detection device employs the air blowing method to perform bridge pipe raw gas pressure detection to effectively solve the problem that the pressure tapping pipeline is obstructed caused by the substances such as the dust, the tar, the naphthalene and the like in the raw gas and perform long-term stable operation; and moreover, the accurate detection of the coke oven bridge pipe raw gas pressure is performed, and the measurement error does not exceed the range from -5Pa to +5Pa through test calibration so as to facilitate the pressure control of a coking chamber.

Description

technical field [0001] The invention relates to the technical field of coke oven gas pressure detection, in particular to a coke oven bridge pipe raw gas pressure detection device. Background technique [0002] The pressure of the carbonization chamber of the coke oven is an important process parameter in coking production. The stability of the pressure of the carbonization chamber is beneficial to the clean production of the coke oven and the quality of coke. If the pressure in the carbonization chamber is too high when charging coal, it will easily cause a large amount of waste gas to escape and cause serious pollution. The negative pressure at the bottom of the carbonization chamber at the end of coking in the coke oven will easily lead to leakage of the furnace wall of the carbonization chamber, which will affect the quality of coke and the life of the coke oven. [0003] In order to control the pressure of the carbonization chamber of the coke oven, it is necessary to d...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a coke oven bridge pipe raw gas pressure detection device, which uses the air blowing method to detect the bridge pipe raw gas pressure, effectively solving the problem of blockage of the pressure taking pipeline caused by dust, tar, naphthalene and other substances in the raw gas , can run stably for a long time; at the same time, the accurate detection of the raw gas pressure of the coke oven bridge tube is realized, and the measurement error of the calibration test does not exceed ±5Pa, which is beneficial to the control of the pressure of the carbonization chamber

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