A circulating fluidized bed boiler

Abstract

The invention discloses a circulating fluidized bed-boiler, and belongs to the technical field of electricity generating. The circulating fluidized bed-boiler comprises a control system, a boiler walland a soot blowing hole, wherein the soot blowing hole is formed in the boiler wall. The circulating fluidized bed-boiler further comprises infrared temperature measurement systems, the infrared temperature measurement systems comprises infrared temperature measurement probes, peep pipes and flanges, one ends of the peep pipes are fixed to the boiler wall through the flanges, the other ends of the peep pipes are connected with the infrared temperature measurement probes, the infrared temperature measurement probes directly face the center of the soot blowing hole through the peep pipes, and measurement values of the infrared temperature measurement probes are fed back to the control system. The circulating fluidized bed-boiler has a long service life, reduces the abrasion speed of temperature measurement elements, reduces daily maintenance quantities, has high temperature measurement response speed, shortens the starting time, saves the fuel cost and prevents a furnace bottom from coking, and the reliability of bed temperature measurement is guaranteed.

Description

technical field [0001] The invention relates to a circulating fluidized bed boiler, belonging to the technical field of power generation. Background technique [0002] The main feature of the circulating fluidized bed boiler is that the material undergoes multiple cycles, and the combustion and desulfurization reactions are repeated in the furnace. During the combustion of the material, the temperature of the material layer, commonly known as the bed temperature, is the key to ensure the safety and operation of the circulating fluidized bed boiler equipment. One of the important parameters of economy, if the bed temperature of the fluidized bed is too low, it will cause coking in the fluidized bed, which will affect the desulfurization and combustion effect. Secondary combustion leads to high-temperature coking in the water wall and high-temperature reheater, so the control of the bed temperature of the circulating fluidized bed boiler is very important. [0003] At present...

AI Technical Summary

Problems solved by technology

It is very easy to damage the thermocouples distributed in this position, resulting in thermocouple failure or inaccurate measurement results, resulting in increased daily maintenance of thermocouples, high maintenance costs, and will also affect the safe and stable operation of the power plant

[0005] 2. The response time of the thermocouple is slow, resulting in coking of the hearth

Once the coke is formed in the bed material, as time goes by, the coke will stick together and become bigger and bigger, making fluidization more difficult, resulting in a vicious circle and blockage

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