Control system for water-coal-slurry heat-conducting oil boiler

Abstract

The invention belongs to the technical field of boiler control and particularly relates to a control system for a water-coal-slurry heat-conducting oil boiler. The control system comprises a PLC (Programmable Logic Controller) with a built-in control procedure; the signal acquisition input end of the PLC is connected with an oil outlet and oil return temperature detection module of heat-conducting oil, a boiler pressure detection device, a boiler liquid level detection device and a coal-water slurry combustion flame detection device; the control output end of the PLC is connected with an induced air regulator for controlling an induced draft fan, an air supply regulator for controlling an air feeder, a circulating oil pump controller, a slurry supply pump variable-frequency controller and an ignition device; and the PLC is also connected with a human-computer interface and an alarm interlock control device. The control system has the benefits that the water-coal-slurry boiler is controlled by the PLC to perform stable heating and accurately adjust the temperature; automatic temperature control and regulation is sensitive, the temperature regulation precision is high, and the heat supply is stable; and the outlet temperature of the heat-conducting oil boiler is controlled to be plus or minus 1 DEG C, so that the requirements of a polyester production enterprise and other enterprises are better satisfied.

Description

technical field [0001] The invention belongs to the technical field of boiler control, and in particular relates to a coal-water slurry heat-conducting oil boiler control system. [0002] Background technique [0003] In traditional coal-fired boilers, the coal fuel is a solid combustion method, but the coal-water slurry boiler has revolutionized it into a high-pressure liquid atomized combustion method. This method, which is similar to fuel combustion, fully integrates the chemical and physical characteristics of various combustion factors of liquid fuel, air, and water, and promotes a substantial increase in fuel burnout rate (compared to coal-fired boilers). According to the combustion mechanism of liquid coal-based fuel, the entire system of the boiler is optimized and reset, which not only greatly improves the final heat utilization efficiency of the boiler, but also reduces the gas emissions of major pollutants, so that the coal-water slurry boiler fully realizes the ...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a coal-water slurry heat-conducting oil boiler control system, aiming at solving the problem that the outlet temperature of the current coal-water slurry heat-conducting oil boiler is generally controlled at about ±5°C, which cannot meet the needs of industries such as chemical fiber and plastics. Sexually demanding technical issues

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