Metal wall temperature measurement system for rotary air preheater

Abstract

The invention relates to a temperature measurement system, particular to a metal wall temperature measurement system for a rotary air preheater. The metal wall temperature measurement system for a rotary air preheater comprises an online continuous temperature measurement device and a receiver, wherein the online continuous temperature measurement device is arranged at the lower part of a metal heat accumulation body of the rotary air preheater and rotates with the metal heat accumulation body and consists of a temperature measuring probe, a compensation lead wire, a wireless temperature sensor and an incubator; a chip thermocouple is communicated with the wireless temperature sensor through the compensation lead wire; the wireless temperature sensor is placed in the incubator, is kept ina use temperature range, and is connected with the receiver through a wireless signal; and the receiver is arranged in a transmission distance of the wireless temperature sensor. By using the device,operators of a power plant can know the running state of the air preheater at any time, low-temperature acid corrosion, ash blockage, secondary combustion and the like can be avoided, and safe operation can be guaranteed. Meanwhile, according to measurement data, the running parameters of a steam air heater and smoke exhaust temperature can be controlled, and economical operation is realized.

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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