Sound wave sensor and system for detecting temperature field in boiler

Abstract

The invention provides a sonic sensor for detecting a temperature field in a boiler. The sonic sensor comprises a shell, an edge clamping bending vibration disc, a longitudinal vibration amplitude-change pole, a piezoelectric ceramic stack, a heavy mass block and a tail end cover, wherein the edge clamping bending vibration disc is inversely welded at one end of the shell and is used for receiving sound wave information fed back by a temperature field in a boiler; the piezoelectric ceramic stack is arranged in the shell, and the piezoelectric ceramic stack is connected with an edge clamping bending vibration disc through a longitudinal vibration amplitude-change pole and used for converting the sound wave information into an electric signal; the piezoelectric ceramic stack is connected with the heavy mass block through a fixing bolt, and the tail end cover is arranged at the end, away from the fixing bolt, of the heavy mass block and used for fixing the heavy mass block. According to the sensor, acoustic signals are amplified through the piezoelectric ceramic pile, the accuracy of acoustic detection can be guaranteed, and the sensor is more suitable for the environment where dust is gathered in a hearth.

Description

technical field [0001] The present application relates to the technical field of boiler monitoring, in particular to an acoustic wave sensor and system for detecting the temperature field in a boiler. Background technique [0002] With the development of society, boilers have played an important role in our daily life, especially in the field of power supply and heating. Therefore, the safe and efficient operation of the boiler is directly related to the overall economy and safety. In view of its huge energy consumption and emissions, the boiler has long been an important supervision object of the environmental protection department. Because the combustion process in the boiler furnace is a very complicated Suspension combustion, the working condition is extremely unstable, if the temperature field in the furnace cannot be determined, the operating condition of the boiler cannot be adjusted in time, which will easily lead to insufficient combustion, low thermal efficiency, a...

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Problems solved by technology

Therefore, the safe and efficient operation of the boiler is directly related to the overall economy and safety. In view of its huge energy consumption and emissions, the boiler has long been an important supervision object of the environmental protection department. Because the combustion process in the boiler furnace is a very complicated Suspension combustion, the working condition is extremely unstable, if the temperature field in the furnace cannot be determined, the operating condition of the boiler cannot be adjusted in time, which will easily lead to insufficient combustion, low thermal efficiency, and more dust and other pollutants , What's more, there are major safety accidents such as explosions, so the monitoring of the furnace temperature field is particularly important. In recent years, for the monitoring of the furnace temperature field, the technology of acoustic temperature measurement has become more and more mature. The attenuation in the furnace with high temperature and high dust is serious, which leads to inaccurate monitoring of the temperature in the boiler by using the acoustic wave sensor

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