Flue gas pretreatment device blocking monitoring device and method

Abstract

The invention discloses a flue gas pretreatment device blocking monitoring device and a method. The flue gas pretreatment device comprises a heating device and a sampling probe, wherein the sampling probe comprises a filtering head; a high temperature-resisting collimation fiber is arranged in front of the filtering head; the input end of the high temperature-resisting collimation fiber is connected with a 1064nm frequency-stabilized laser; uniformly-distributed micro laser energy monitoring probes are arranged behind the filtering head; the output ends of the uniformly-distributed micro laser energy monitoring probes are connected with a control system; and the control system is internally provided with a dynamic laser energy monitoring module. Through selecting the 1064nm laser and the laser energy monitoring system, online monitoring on high-temperature flue gas filtering device blocking factors can be realized, timely cleaning of the high-temperature flue gas filtering device is further controlled, damages caused by blocking and blocking treatment cost can be reduced while flue gas components are monitored high efficiently, and the device and the method have application values.

Description

technical field [0001] The invention relates to the field of flue gas treatment, in particular to a device and method for monitoring blockage of a flue gas pre-treatment filter device based on 1064nm laser energy measurement. Background technique [0002] With the improvement of people's requirements for the quality of living environment and working environment, the monitoring of multi-component gases in industrial sites in complex and harsh environments is becoming more and more important. Device and sampling probe, the sampling probe is equipped with a control valve, which is used to ensure the flexibility of the probe entering and exiting the sampling port; the inside of the sampling probe includes a filter head, an air guide tube and a connection port in sequence, and there are several superimposed valves inside the filter head The filter screen is used to improve the filtering effect of the sampling head. The filter screen is made of sintered silicon carbide ceramics, a...

AI Technical Summary

Problems solved by technology

[0002] With the improvement of people's requirements for the quality of living environment and working environment, the monitoring of multi-component gases in industrial sites in complex and harsh environments is becoming increasingly important. During the monitoring process, the flue gas pre-treatment device to be used at least includes flexible heating Device and sampling probe, the sampling probe is equipped with a control valve, which is used to ensure the flexibility of the probe entering and exiting the sampling port; the inside of the sampling probe includes a filter head, an air guide tube and a connecting port in sequence, and there are several superimposed valves inside the filter head The filter screen is used to improve the filtering effect of the sampling head. The filter screen is made of sintered silicon carbide ceramics, and the filter hole designed on it is less than 2 μm to ensure its filtration accuracy. However, while improving the filtration accuracy, it is also easy to cause blockage of the filter screen. , in order to prevent inaccurate monitoring caused by the treatment of filter clogging, in the current device, the redundant design of the probe used for back blowing is usually adopted. When the sampling device is working, one sampling probe is working normally to sample, and the other redundant probe is Backflush, supplemented by nitrogen to backflush the sampling probe, to prevent the clogging of the sampling probe, this design increases the cost and consumption of the instrument and the difficulty of operation

Images