System and method for measuring waste gas pressure in coke oven bridge tube

Abstract

The invention provides a system and method for measuring a waste gas pressure in a coke oven bridge tube. The system comprises a sampling probe, a differential pressure transmitter, and a constant flow blowing device, and further comprises a first shutoff valve, a second shutoff valve, a profiled ferrule tee fitting, and a tee fitting. A sampling probe outlet is connected to a profiled ferrule teefitting through a sampling total pipeline, and is divided into two paths: a steam purging pipeline and a pressure detecting pipeline through the profiled ferrule tee fitting. The design aims to: 1) cancel the design of an original ammonia spray, increase a steam periodic purging device to solve the plugging problem of a pressure guiding tube, ensure the accuracy of pressure measurement, and reduce the labor intensity of maintenance personnel; and 2) solve the problem that the connection cables of a pressure detecting element and a purge switching element are easily burnt.

Description

technical field [0001] The invention relates to the field of coke oven gas detection, in particular to a coke oven bridge pipe raw gas pressure measurement system and method. Background technique [0002] In order to realize the stable control of the pressure in each carbonization chamber of the coke oven, it is necessary to measure the gas pressure of the bridge tube accurately and stably. However, because the raw coal gas produced in the coke oven production process contains coal powder and tar, it is easy to accumulate graphite and tar on the elbows and joints, block the pressure guiding tube, and cause the pressure measuring device to work abnormally. Therefore, it is necessary to manually clean the guiding tube regularly. Pressure pipe, and it is easy to cause waste gas to overflow during the cleaning process. [0003] The Chinese patent with the publication number CN 106595948A discloses a coke oven bridge pipe gas pressure measuring device. In the scheme, ammonia wat...

AI Technical Summary

Problems solved by technology

However, because the raw coal gas produced in the coke oven production process contains coal powder and tar, it is easy to accumulate graphite and tar on the elbows and joints, block the pressure guiding tube, and cause the pressure measuring device to work abnormally. Therefore, it is necessary to manually clean the guiding tube regularly. pressure pipe, and it is easy to cause waste gas to overflow during the cleaning process

[0003] The Chinese patent with the publication number CN 106595948A discloses a coke oven bridge tube gas pressure measuring device. In the solution, ammonia water spraying at the front end of the sampling tube is used to solve the tube blockage, but the effect is not satisfactory.

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