Interference eliminating device and interference eliminating method of multicomponent flue gas analyzer

Abstract

The invention discloses an interference eliminating device and an interference eliminating method of a multicomponent flue gas analyzer. The interference eliminating device comprises a main body, wherein a gas delivery mechanism, a gas inlet, a dust filtering membrane, a gas separating column, a gas pump and a gas outlet are arranged on the main body in turn, a constant temperature device is arranged outside the main body, the gas delivery mechanism comprises an environment temperature sensor, a controller and a solenoid valve, the environment temperature sensor is arranged to monitor a real-time environment temperature and deliver the real-time environment temperature to the controller, the controller is arranged to control the solenoid valve to implement real-time regulation on gas delivery flow according to the real-time environment temperature, the dust filtering membrane is a 100% borosilicate glass fiber membrane, the gas separating column consists of a stainless steel tube molecular sieve and a silica gel column in serial connection, and the gas pump is arranged to ensure analyzed gas to pass through the gas outlet at a certain rate and pressure, so as to ensure an analyzing effect of the flue gas analyzer.

Description

technical field [0001] The invention belongs to the field of flue gas analyzers, in particular to a multi-component flue gas analyzer interference elimination device and method. Background technique [0002] The flue gas analyzer is mainly used to measure the concentration of sulfur dioxide, nitrogen oxides, carbon monoxide and other harmful gases and oxygen in the exhaust gas of pollution sources. The common methods are constant potential electrolysis method and non-dispersive infrared absorption method. However, due to the similarity of physical and chemical properties such as gas molecular size or electrode potential, there is cross-interference between the gases to be measured, that is, the response of the sensor to other gases other than the target gas. These interferences seriously affect the accuracy of on-site flue gas measurement data. accuracy. The current interference elimination methods mainly include selecting characteristic electrode materials and improving th...

AI Technical Summary

Problems solved by technology

However, the above method is mainly to eliminate or reduce interfering gases, but it cannot realize the common detection of multi-component gases. In addition, the increase of "bias" voltage will also reduce the sensitivity of the instrument, and the solid particle impurities in the flue gas will seriously Interfering with the detection process, resulting in reduced analysis accuracy

Images