CN-121977224-A - Pulverized coal combustion air supply adjusting method

Abstract

A pulverized coal combustion air supply adjusting method. In the prior art, the direction of the connecting rod pulling the secondary air nozzle to deflect is limited, so that the sufficient combustion efficiency of the pulverized coal is affected. The air supply device comprises an air supply bellows, an air supply pipeline and an air supply spray nozzle, wherein the air supply bellows is connected with the air supply spray nozzle through the air supply pipeline, the upper end of the air supply spray nozzle is connected with a transverse adjusting assembly for transversely adjusting the air supply spray nozzle through a connecting block, and the upper end of the transverse adjusting assembly is connected with a longitudinal adjusting assembly for longitudinally adjusting the air supply spray nozzle through a connecting rod. The invention is applied to pulverized coal combustion air supply adjustment.

Inventors

• QI HANG
• WANG XU
• RUAN ZHENG
• CHENG CHAO
• LI CHANGSHENG
• SHANG QI
• JIANG XIAO

Assignees

• 安徽华电芜湖发电有限公司

Dates

Publication Date

20260505

Application Date

20260306

Claims (5)

1. 1. The pulverized coal combustion air supply adjusting method is characterized by comprising the following steps of: (1) When the air supply spray head needs to be longitudinally adjusted, the electric push rod is started to extend, and as the push rod end of the electric push rod is connected with the connecting rod, the shell end is connected with the fixed plate to push the connecting rod to rotate, the middle part of the connecting rod is connected with the fixed plate through the first connecting shaft, the other end of the connecting rod is connected with the door-shaped plate through the second connecting shaft, so that the door-shaped plate can be driven to move up and down when the connecting rod rotates, and the longitudinal adjustment of the air supply spray head is realized; (2) When the transverse adjustment is needed, the motor is started, the motor is a gear motor, and the output shaft of the motor rotates to drive the shaft lever to rotate, so that the air supply spray head is driven to swing, and the transverse angle adjustment is realized.
2. 2. The pulverized coal combustion air supply adjusting method according to claim 1, characterized by comprising the following steps: the upper end of the air supply spray head is connected with a transverse adjusting component for transverse adjustment of the air supply spray head through a connecting block, and the upper end of the transverse adjusting component is connected with a longitudinal adjusting component for longitudinal adjustment of the air supply spray head through a connecting rod.
3. 3. The method of adjusting pulverized coal combustion air supply according to claim 2, wherein the longitudinal adjusting assembly comprises a fixed plate, a support is arranged on the fixed plate, the support is hinged with the middle of a connecting rod, one end of the connecting rod is hinged with an electric push rod, and the other end of the connecting rod is hinged with a door plate.
4. 4. The method for adjusting pulverized coal combustion air supply according to claim 3, wherein the transverse adjusting assembly comprises a connecting block, a through hole is formed in the connecting block, a shaft rod penetrates through the through hole and is fixed with the connecting block through a fixing bolt, two ends of the shaft rod are connected with the door-shaped plate through bearings, and the end part of the shaft rod is connected with an output shaft of the motor through a coupling.
5. 5. The method of adjusting pulverized coal combustion air supply according to claim 4, wherein the connecting rod is a subtype connecting rod.

Description

Pulverized coal combustion air supply adjusting method Technical Field The invention relates to a pulverized coal combustion air supply adjusting method. Background The air staged combustion is a low nitrogen combustion technology commonly adopted in coal-fired power station boilers, and is characterized in that oxygen required by coal powder combustion is staged and fed into a hearth, the oxygen of a main combustion area is reduced, the reduction of the temperature of a flame center is realized, the control of thermal type NOx generation amount and fuel type NOx generation amount is facilitated, residual air required by complete combustion is fed into an area outside a combustion center, unburned coal powder particles and combustible gas in flue gas are completely combusted in the area, and after searching, the prior art (application number: CN 202221782593.8) describes a wind box of a coal powder combustor, an adjusting ruler is arranged outside the box, a rotating shaft is arranged inside the box, the rotating shaft is connected with a shell of a secondary air nozzle of the coal powder combustor, a first connecting rod and a second connecting rod are movably connected between the adjusting ruler and the shell of the secondary air nozzle of the coal powder combustor, and when the angle of the secondary air nozzle of the coal powder combustor needs to be adjusted, the first connecting rod which is movably connected with the adjusting ruler is arranged outside the box can be adjusted, and the movement of the first connecting rod drives the second connecting rod to move, so that the angle of the secondary air nozzle can deflect further. The horizontal air staged combustion device is simple in structure, reasonable in design and convenient to operate, effectively realizes on-line adjustment of the horizontal angle of the secondary air nozzle, and fully realizes air staged combustion in the horizontal direction, but in the prior art, the direction of the connecting rod pulling the secondary air nozzle to deflect is limited, so that the problem of influencing the full combustion efficiency of coal dust is solved. Disclosure of Invention The invention aims to provide a high-efficiency pulverized coal combustion control device, which is used for solving the problem that the direction of a connecting rod pulling a secondary air nozzle to deflect is limited in the prior art, so that the sufficient combustion efficiency of pulverized coal is affected. The above object is achieved by the following technical scheme: a pulverized coal combustion air supply adjusting method, comprising the following steps: (1) When the air supply spray head needs to be longitudinally adjusted, the electric push rod is started to extend, and as the push rod end of the electric push rod is connected with the connecting rod, the shell end is connected with the fixed plate to push the connecting rod to rotate, the middle part of the connecting rod is connected with the fixed plate through the first connecting shaft, the other end of the connecting rod is connected with the door-shaped plate through the second connecting shaft, so that the door-shaped plate can be driven to move up and down when the connecting rod rotates, and the longitudinal adjustment of the air supply spray head is realized; (2) When the transverse adjustment is needed, the motor is started, the motor is a gear motor, and the output shaft of the motor rotates to drive the shaft lever to rotate, so that the air supply spray head is driven to swing, and the transverse angle adjustment is realized. According to the pulverized coal combustion air supply adjusting method, the upper end of the air supply spray head is connected with a transverse adjusting component used for transverse adjustment of the air supply spray head through a connecting block, and the upper end of the transverse adjusting component is connected with a longitudinal adjusting component used for longitudinal adjustment of the air supply spray head through a connecting rod. The longitudinal adjusting component comprises a fixed plate, a support is arranged on the fixed plate, the support is hinged with the middle of a connecting rod, one end of the connecting rod is hinged with an electric push rod, and the other end of the connecting rod is hinged with a door plate. The transverse adjusting component comprises a connecting block, a through hole is formed in the connecting block, a shaft rod penetrates through the through hole and is fixed with the connecting block through a fixing bolt, two ends of the shaft rod are connected with the door-shaped plate through bearings, and the end part of the shaft rod is connected with an output shaft of a motor through a coupler. The pulverized coal combustion air supply adjusting method, the connecting rod is a subtype connecting rod. Advantageous effects 1. According to the invention, the longitudinal adjusting component drives the air supply nozzle to adjust the ver