Online specific gravity measuring system of coke oven gas

Abstract

The invention relates to the field of online gas analysis and measurement, in particular to an online specific gravity measuring system of coke oven gas. A dust filtering unit, a tar filtering unit, anaphthalene filtering unit and a specific gravity sensor unit are communicated successively through a pipeline based on a process sequence in a housing. An air inlet end of the dust filtering unit isconnected with a coal gas inlet pipe on the housing; and an air outlet end of the specific gravity sensor is connected with a coal gas outlet pipe arranged at the housing. A zero-regulating resistorand a range-regulating resistor are arranged at a zero-point full scale adjusting unit. During zero point and full scale adjustment, a controller is calibrated intelligently to set an offset value between a specific gravity measuring value and 1 to be a constant and the offset value is compensated into follow-up coke oven gas specific gravity measurement when the specific gravity measuring value of the specific gravity sensor in a no-load state is 0.98 to 1.02. Compared with the prior art, the provided system has the following advantages: impurities like tar, naphthalene, dust, and sulfide areremoved and the reference zero point of the sensor is adjusted automatically and rapidly, so that the need of online and automatic specific gravity measurement of the coke oven gas is met.

Description

technical field [0001] The invention relates to the field of on-line analysis and measurement of gas quality parameters, in particular to an on-line specific gravity measurement system for coke oven gas, which is used for real-time automatic measurement of the specific gravity parameters of coke oven gas. Background technique [0002] At present, the domestic methods for measuring gas specific gravity mainly include the "gas pycnometer method" in the laboratory. The method is to put a certain volume of gas V in the gas cylinder, and weigh the gas mass m with a balance, then the gas density G=gas mass m / The gas volume V, and then the gas density G / air density (1.293) is equal to the specific gravity of the gas. Its advantages are accurate measurement, but its disadvantages are slow response and poor real-time performance. It is not suitable for some industrial occasions that require real-time measurement. The online measurement technology of gas specific gravity is still bla...

AI Technical Summary

Problems solved by technology

[0002] At present, the domestic methods for measuring gas specific gravity mainly include the "gas pycnometer method" in the laboratory. The method is to put a certain volume of gas V in the gas cylinder, and weigh the gas mass m with a balance, then the gas density G=gas mass m / The gas volume V, and then the gas density G / air density (1.293) is equal to the specific gravity of the gas. Its advantages are accurate measurement, but its disadvantages are slow response and poor real-time performance. It is not suitable for some industrial occasions that require real-time measurement.

[0004] Before the sensor can measure the specific gravity of gas, it needs to use CH 4 , N 2 As the reference zero point and full scale of the calibration gas calibration sensor, this process is a manual operation, the process is to operate two adjustable resistors, repeatedly back and forth, this process requires multiple operations to complete the calibration, which is time-consuming and laborious, and If the adjustment is not accurate, it is increasingly unable to adapt to the current situation of automated high-efficiency production, so it is urgent to improve and upgrade

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