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Coal-fired power plant ash conveying system dynamic energy-saving control method based on actual coal quality parameters

A technology for coal-fired power plants and system dynamics, applied in electrical program control, comprehensive factory control, program control, etc., can solve the problems of ash blocking and high energy consumption

Active Publication Date: 2021-07-06
XIAN THERMAL POWER RES INST CO LTD +1
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems of ash clogging and high energy consumption in the positive pressure dense phase ash conveying system of the existing coal-fired power plant. safety margin factor Provide a dynamic energy-saving control method for coal-fired power plant ash conveying system based on actual coal quality parameters

Method used

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  • Coal-fired power plant ash conveying system dynamic energy-saving control method based on actual coal quality parameters
  • Coal-fired power plant ash conveying system dynamic energy-saving control method based on actual coal quality parameters
  • Coal-fired power plant ash conveying system dynamic energy-saving control method based on actual coal quality parameters

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Experimental program
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Embodiment

[0028] step one:

[0029] Establish a coal-fired real-time coal quality parameter model for the ash conveying system (see the system diagram for details figure 2 ):

[0030] (1) After the coal enters the coal yard, it is piled up according to the type of coal, and the coal parameters of the coal pile are obtained from the incoming coal test:

[0031] Total Moisture M m ;Received base ash A m , the subscript m is the coal pile number

[0032] (2) Introduce a coal-fired online microwave moisture meter on the furnace coal belt, and conduct a secondary measurement of the total moisture of the coal entering each coal bunker: M′ m , and use it to correct the received base ash: A′ m .

[0033]

[0034] (3) According to the real-time coal feeding rate G of the coal feeder corresponding to each coal bunker 1 ~G 6 , the unit is t / h, and the real-time coal-fired parameters entering each coal bunker are obtained from (2), and then the comprehensive dynamic ash characteristic v...

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Abstract

The invention discloses a coal-fired power plant ash conveying system dynamic energy-saving control method based on actual coal quality parameters. The method comprises the steps: 1) establishing a unit fire coal real-time coal quality parameter model for an ash conveying system; 2) carrying out an optimal ash falling time control test on the ash conveying system by using the real-time coal quality parameter model of the unit fire coal in the step 1) to obtain an ash falling time control curve of the ash conveying system, which adapts to the dynamic ash flow, of each ash conveying unit; 3) automatically setting the ash falling time of each ash conveying unit according to the ash falling time control curve of the ash conveying system in the step 2), the coal quality parameters of each raw coal bunker and the coal quantity of each coal feeder in combination with the ash falling time control curve of the ash conveying system adapting to the dynamic ash flow; 4) if all the ash conveying units operate normally in the ash conveying process, performing the step 3) circularly; and if an abnormal phenomenon occurs in a certain ash conveying unit, stopping ash falling immediately, and directly performing a fly ash conveying program, meanwhile, automatically settting a safety margin coefficient to give an alarm prompt on a monitoring picture.

Description

technical field [0001] The invention belongs to the technical field of operation of the ash conveying system of a coal-fired power plant, and in particular relates to a dynamic energy-saving control method for the ash conveying system of a coal-fired power plant based on actual coal quality parameters. Background technique [0002] The flue gas produced by the combustion of boilers in coal-fired power plants contains a large amount of fly ash. After being captured in the dust removal system, it is transported to the ash storage by the positive pressure dense phase pneumatic ash conveying system below it, and then transported to the outside of the plant by car. The gas source of the ash conveying system is provided by the ash conveying air compressor. The ash conveying system is divided into several ash conveying units according to the different parts where the dust collector unit corresponding to the upper part is divided according to the flue gas flow direction. The energy...

Claims

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Application Information

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IPC IPC(8): G05B19/418
CPCG05B19/41865G05B2219/32252Y04S10/50
Inventor 张奔王宏武林琳李杨周元祥王勇穆祺伟
Owner XIAN THERMAL POWER RES INST CO LTD
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