Solution for the detection of flue gas temperature in the second combustion chamber
1. Background and meaning
In the solid waste incineration process, solid materials It is sent into the rotary kiln through the feeding device, and the residue falls from the kiln tail into the slag hopper, and is continuously discharged by the slag discharge system. The flue gas generated from the combustion enters the secondary combustion chamber from the kiln tail for high temperature combustion, and the secondary combustion chamber removes the flue gas twice After combustion, it enters the quench tower to quickly cool down to fully decompose the dioxins in the flue gas. Therefore, it is extremely important to monitor the flue gas temperature in the second combustion chamber and the quench tower. The current common temperature measurement method is thermocouple measurement. The main problems are:
● Material wash away the temperature probe, the high temperature environment will corrode the sensor, and it is easy to damage the temperature probe;
● The probe is skinned, the sensor is wrapped, and the temperature measurement has a hysteresis, and the real-time temperature cannot be accurately obtained.
Second combustion chamber flue gas temperature detection solution The system structure of the scheme is mainly composed of a temperature measuring probe and a control box. Due to the complex working conditions inside the second combustion chamber and the furnace wall is easy to coke, an automatic decoking probe is used to ensure the cleanliness of the radiation window. According to the characteristics of the boiler flue gas, the filter is used Obtain the narrowband infrared spectrum as the response band of the sensor to improve the accuracy of temperature measurement. This set of programs has functions such as automatic air cut-off protection, timing slag removal, and data filtering and smoothing.
● Non-contact temperature measurement, long service life of the equipment, increasing economic benefits of the enterprise;
● Fast response speed, wide temperature measurement range, high temperature resolution, convenient for real-time process control;
● With functions such as automatic slag cleaning and air curtain protection, it is maintenance-free and has low operation and maintenance costs.
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