ACC automatic combustion control method for waste incineration plant

Abstract

The invention discloses an ACC automatic combustion control method for a waste incineration plant. The ACC automatic combustion control method for the waste incineration plant comprises the following steps of calculating the actual garbage treatment capacity and the density of garbage entering a furnace, estimating a garbage lower calorific value, calculating the garbage demand quantity, deducing the total air quantity demand, controlling the primary air quantity, controlling the oxygen quantity and the hearth temperature, controlling the material layer thickness, controlling combustion, controlling a material pusher, controlling a three-section fire grate, controlling the thermal ignition loss, controlling the main steam flow, controlling the main steam pressure, controlling the primary air temperature, controlling the secondary air temperature, detecting a combustion diagram, and operating a hearth flame analysis system, a main steam flow prediction system, a main steam temperature prediction system, a hearth temperature prediction system and a flue gas purification control system. According to the ACC automatic combustion control method for the waste incineration plant provided by the invention, estimation of the garbage lower calorific value of a garbage incineration plant and calculation of the actual garbage treatment capacity are achieved, and the thickness of a material layer of a fire grate is accurately controlled, so that garbage is fully combusted, the heat efficiency is improved, the automatic input rate is fully improved, and meanwhile, the manual operation intensity is reduced.

Description

technical field [0001] The invention relates to a combustion control method of a garbage incineration plant, in particular to an ACC automatic combustion control method of a garbage incineration plant, belonging to the field of solid waste treatment. Background technique [0002] With the fierce development trend of the domestic waste incineration power generation industry, the environmental protection requirements for waste incineration power generation projects and the automation of waste automatic combustion control are getting higher and higher, which is one of the important standards for judging the quality of waste incineration power generation projects. At present, domestic waste incineration plants have a low investment rate in waste ACC automatic combustion control. Many process systems in the production and operation process require a lot of manual operation and intervention, which increases the intensity of manual work and leads to low economic benefits. Typical p...

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Problems solved by technology

[0005] 1. The low calorific value of the waste entering the furnace is difficult to determine and the density is unstable, the lag time is long, and it is difficult to control, resulting in poor automatic combustion control effect;

[0006] 2. The matching degree between the action frequency of the pusher and the action frequency of the incineration grate is not complete, and the waste of the incinerator grate will be biased and burned for a long time during operation;

[0007] 3. The material layer thickness control of the grate is not uniform and unstable, resulting in different action frequencies of the burning grate, which affects the burning status of the garbage;

[0008] 4. The automatic combustion control effect of the garbage incinerator is poor, resulting in large fluctuations in the main steam flow and main steam pressure of the boiler, and the operation of the unit is uneconomical;

[0009] 5. The control of the slag thermal ignition loss rate is relatively high, the garbage is not burned sufficiently, the amount of garbage residue increases, and the thermal efficiency of combustion is reduced;

[0010] 6. The control of many process systems in waste incineration plants is unstable, and many process systems are operating under manual control, which increases the work intensity of workers and is inefficient;

[0011] 7. The automatic control of the flue gas purification system is unstable, resulting in large fluctuations in the data of environmental protection indicators, and even the phenomenon of indicators exceeding the standard

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