Metal wall temperature measurement system for rotary air preheater

Abstract

The present invention relates to temperature measurement systems. The metal wall temperature measurement system of the rotary air preheater is composed of an online continuous temperature measurement device and a receiver. The online continuous temperature measurement device is installed at the lower part of the metal heat storage body of the rotary air preheater and rotates with the metal heat storage body. The online continuous temperature measurement device is composed of a temperature measuring probe, a compensation wire, a wireless temperature sensor and an incubator. The patch thermocouple is connected to the wireless temperature sensor through the compensation wire. The wireless temperature sensor is placed in the incubator to keep the wireless temperature sensor within the operating temperature range. Inside, the wireless temperature sensor is connected to the receiver through a wireless signal, and the receiver is installed within the transmission distance of the wireless temperature sensor. The use of this device will enable power plant operators to keep track of the operating status of the air preheater, avoid low-temperature acid corrosion, ash blocking, secondary combustion, etc., and ensure safe operation. At the same time, it can also control the operating parameters of the air heater and the exhaust gas temperature according to the measurement data, so as to realize economical operation.

Description

technical field [0001] The invention relates to a temperature measurement system, in particular to a temperature measurement system for a rotating body in a special environment. Background technique [0002] A rotary air preheater is a regenerative heat exchanger that operates in countercurrent. Metal heat storage elements processed into special corrugations are tightly placed in the fan-shaped compartment of the rotor. The rotor rotates at a certain speed, and the left and right halves are the flue gas and air channels respectively. When the flue gas flows through the rotor, the flue gas releases heat to the heat storage element, and the temperature of the flue gas decreases; when the heat storage element rotates to the air side, it releases heat to the air, and the air temperature rises. Such a cycle goes round and round to realize the heat exchange between flue gas and air. There are more than 20,000 units in operation in the world. Most of the large-scale power plant b...

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Problems solved by technology

[0007] The purpose of the present invention is to overcome the above-mentioned deficiencies and provide a metal wall temperature measurement system for a rotary air preheater, which solves the temperature measurement problem of the rotating body through the transmitting and receiving system of the wireless temperature sensor, and solves the problem through heat transfer and heat storage technology Solve the problem of the use environment of the wireless temperature sensor and ensure the normal operation of the online temperature measurement

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