Leakage detection device for flue gas waste heat recovery heat exchanger

Abstract

A leakage detection device of a flue gas waste heat recovery heat exchanger comprises a flue gas waste heat recovery heat exchanger, a flue, an infrared camera, an infrared imaging device and a central processing unit; the flue gas waste heat recovery heat exchanger and the infrared camera are arranged in the flue; the infrared imaging device is arranged outside the flue, one end of the infrared imaging device is connected with the infrared camera, and the other end of the infrared imaging device is connected with the central processing unit; one end of the central processing unit is connectedwith the thermographic analysis processor, and the other end of the central processing unit is connected with a DCS; the DCS is connected with a valve through a control circuit, and the valve is connected with the flue gas waste heat recovery heat exchanger. According to the leakage detection device, the temperature distribution condition inside the flue gas waste heat recovery heat exchanger isconverted into a thermogram, so that the leakage condition of the flue gas waste heat recovery heat exchanger can be quickly and effectively detected. The leakage detection device has the advantages of simple structure, stable and safe operation, power saving, high detection accuracy rate and wide application range, the difficulty of manual check is greatly reduced, and the device is particularlysuitable for leakage detection of the flue gas waste heat recovery heat exchanger.

Description

technical field [0001] The invention belongs to the field of energy conservation and environmental protection of energy-consuming enterprises such as electric power, iron and steel, and chemical industry, and in particular relates to a leakage detection device for a flue gas waste heat recovery heat exchanger. Background technique [0002] In the fields of electric power, metallurgy, chemical industry, building materials, etc., the temperature of the exhausted flue gas is relatively high, which causes a part of heat loss. The exhaust heat loss is the largest among all heat losses of power plant boilers. Generally, when large and medium-sized power plant boilers are in normal operation, the exhaust heat loss accounts for 4% to 8% of the boiler fuel input heat; and every 15°C to 25°C reduction in exhaust gas temperature can increase the boiler efficiency by about 1%. With the continuous deepening of energy saving work in our country, people pay more and more attention to the ...

AI Technical Summary

Problems solved by technology

Since the flue gas waste heat recovery heat exchanger is arranged in the flue, if leakage occurs but is not discovered in time, it will seriously affect the safe operation of the entire unit. Therefore, timely detection of leakage and effective isolation measures should be taken as soon as possible to recover and exchange flue gas waste heat device is particularly important

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