Air distribution control method and device for pulverized coal boiler
A technology of a pulverized coal boiler and a control method, which is applied in the directions of controlling combustion, combustion method, and air supply adjustment, can solve the problem of inability to accurately adjust the burner, and achieve better combustion effect, and the effect of improving economy and environmental protection.
Active Publication Date: 2018-11-06
河北思路科技有限公司
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Problems solved by technology
[0005] In view of this, this application provides a pulverized coal boiler air distribution control method and device to solve the technical problem that the secondary air distribution system in the prior art cannot be accurately adjusted for each burner
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[0015] The embodiments of the present invention will be described in detail below with the accompanying drawings and examples, so as to fully understand and implement the implementation process of how the present invention applies technical means to solve technical problems and achieve technical effects.
[0016] In the embodiment of the present invention, the total air volume required for complete combustion is calculated according to the real-time pulverized coal volume of the burner. After the primary air volume is calculated, the secondary air volume is determined according to the difference between the total air volume and the primary air volume. The air distribution ratio and the nozzle area determine the hot air speed of the secondary air nozzle, and further determine and adjust the damper opening corresponding to the hot air speed, so as to realize the real-time precise control of the secondary air volume of each burner.
[0017] figure 1 It is an air distribution cont...
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The invention discloses an air distribution control method of a pulverized coal boiler and an air distribution control device thereof. The control method comprises the steps of determining the total air volume of each burner; determining the primary-air volume of each burner according to the pulverized coal piping area and the primary air; determining the peripheral air volume of each burner according to the peripheral air door openness acquired from DCS (Data Communication System); according to the total air volume, peripheral air volume and primary-air volume of each burner, calculating the secondary air volume; according to the secondary air volume, the proportional coefficient and the secondary-air nozzle area, determining the heat state air speed of the secondary-air nozzle; according to the corresponding relation between the heat state wind speed of the secondary-air nozzle and the air door openness, determining the air door openness corresponding to the heat state air speed. By the air distribution control method, a purpose of precisely distributing secondary air can be reached so that the pulverized coal boiler has the better burning effect, and economical efficiency and environmental friendliness of pulverized coal firing are promoted.
Description
technical field [0001] The invention belongs to the technical field of energy conservation and environmental protection of boilers, and in particular relates to a method and a device for air distribution control of a pulverized coal boiler. Background technique [0002] The pulverized coal boiler is a boiler equipment fueled by pulverized coal. The boiler equipment is usually equipped with a dozen to twenty pulverized coal burners, and is equipped with primary air and secondary air distribution devices. Among them, the main function of primary air is to transport pulverized coal to the furnace and ensure the ignition and combustion of volatile matter; the function of secondary air is to supplement the amount of air required for combustion to ensure complete combustion of pulverized coal. The pulverized coal is transported by the primary air through the burner into the furnace, and the secondary air is introduced into the furnace through the secondary tuyere adjacent to the n...
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IPC IPC(8): F23N3/06
CPCF23N3/06F23N2223/10
Inventor 邢红涛
Owner 河北思路科技有限公司