Method for drying pulverized coal based on centrifugation and compressed gas

Abstract

The invention discloses a method for drying pulverized coal based on centrifugation and compressed gas. Generally, a power plant adopts manual beating and rapping device modes to dredge coal, the manual mode is long in treatment time and low in efficiency, and when rapping work of a rapping device is unreasonable, personnel injury is easily caused, and a coal bunker collapses seriously. The method comprises the following steps that coal as fired is conveyed through a belt and falls into a roller after being ploughed through a coal plough, a power motor is started to drive a driving gear to rotate, the driving gear is meshed with a gear ring, and therefore the roller is driven to rotate, centrifugal force is generated, and the coal as fired is thrown away; a spiral wall-attached track is arranged on the inner wall of the roller, coal directly enters a raw coal bunker after the coal enters the roller, a power motor drives the roller to rotate, centrifugal force is generated, coal as fired is thrown away, pressure is adjusted through a compressed air pressure adjusting valve, and compressed air enters an eta air pipe and is sprayed out through a compression nozzle. And under the action of compressed air and centrifugal force, the pulverized coal is dried. The pulverized coal dryer is used for drying pulverized coal.

Description

Technical Field

[0001] The invention relates to a method for drying coal powder based on centrifugation and compressed gas. Background Art

[0002] The raw coal in the coal bunker is sticky and clumping. Beating and vibrating are one of the routine operations of thermal power plants. The coal fed into the furnace is the staple food of thermal power plants and directly affects the safe operation and economic benefits of the power plants. At present, the coal blending of coal fed into the furnace of coal-fired power plants is complex and deviates greatly from the design value. The coal fed into the furnace inevitably has high humidity and high viscosity. Such coal is prone to agglomeration and sticking due to gravity, which can cause problems such as pulverizing system failure, coal shortage, and large load tracking deviation. In response to this, power plants generally use manual beating and vibrating to clear the coal. The manual method takes a long time and is inefficient. If the vibrating work of the vibrator is unreasonable, it can easily cause injuries to personnel and even cause coal bunker collapse in serious cases. Summary of the Invention

[0003] The purpose of the present invention is to remedy the deficiencies of the prior art and to provide a method for drying pulverized coal based on centrifugal and compressed gas.

[0004] The above purpose is achieved through the following technical solutions: A method for drying pulverized coal based on centrifugation and compressed gas, the method comprising the following steps: (1) The coal fed into the furnace has high humidity and viscosity, which causes the coal to clump and stick together due to gravity, affecting the normal operation of the pulverizing system; (2) The incoming coal is conveyed by a belt and falls into the drum after being plowed by the coal plow. The power motor starts to drive the gear to rotate, and the driving gear meshes with the gear ring, thereby driving the drum to rotate and generating centrifugal force to throw the incoming coal away. (3) The inner wall of the drum is provided with a spiral track which delays the coal from entering the raw coal bin. After entering the drum, the power motor drives the drum to rotate, generating centrifugal force to throw the coal into the furnace away. At the same time, the pressure is adjusted by the compressed air pressure regulating valve. The compressed air enters the η air pipe and is ejected through the compression nozzle. Under the action of the compressed air and centrifugal force, the coal powder is dried.

[0005] The method of drying coal powder based on centrifugation and compressed gas is as follows: the drum is connected to the platform frame through a bearing, the compressed air tank is connected to a compressed air pipe, the compressed air pipe is connected to two η air pipes, the η air pipes are inserted into the drum, and multiple compression nozzles are fixed on the air pipes.

[0006] In the method of drying pulverized coal based on centrifugation and compressed gas, a gear ring is fixed to the outside of the drum, a power motor is fixed to the platform frame, the output shaft end of the power motor is fixed to a drive gear, and the drive gear is meshed with the gear ring.

[0007] In the method for drying pulverized coal based on centrifugation and compressed gas, the inner wall of the drum has a spiral wall-adhering track. Beneficial effects

[0008] 1. The present invention uses a spiral wall-adhering track to delay the amount of coal entering the raw coal bin directly, and uses the dual effects of the drum centrifugal force and compressed air to dry the coal powder, avoiding coal agglomeration and sticking, causing the pulverizing system to malfunction and stop operation, resulting in production safety and economic losses, and can save manpower, material resources and economic costs for the unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Attachment Figure 1 It is a structural schematic diagram of the present invention; In the figure: 1. Drum; 2. Power motor; 3. Spiral wall-adhering track; 4. Compressed air tank; 5. Compression nozzle; 6. Compressed air regulating valve; 7. Coal plow; 8. Compressed air pipe; 9. Belt; 10. Raw coal bin; 11. Gear ring; 12. η air pipe; 13. Drive gear; 14. Platform frame. DETAILED DESCRIPTION

[0010] Reference Figure 1 A method for drying pulverized coal based on centrifugation and compressed gas, the method comprising the following steps: (1) The coal fed into the furnace has high humidity and viscosity, which causes the coal to clump and stick together due to gravity, affecting the normal operation of the pulverizing system; (2) The incoming coal is conveyed by a belt and falls into the drum after being plowed by the coal plow 7. The power motor is started to drive the gear to rotate, and the driving gear meshes with the gear ring, thereby driving the drum to rotate, generating centrifugal force to throw the incoming coal away; (3) The inner wall of the drum is provided with a spiral track which delays the coal from entering the raw coal bin. After entering the drum, the power motor drives the drum to rotate, generating centrifugal force to throw the coal into the furnace away. At the same time, the pressure is adjusted by the compressed air pressure regulating valve. The compressed air enters the η air pipe and is ejected through the compression nozzle. Under the action of the compressed air and centrifugal force, the coal powder is dried.

[0011] A method for drying pulverized coal based on centrifugation and compressed gas, which comprises: a drum 1, a platform frame 14 and a compressed air tank 4, wherein the drum is connected to the platform frame via a bearing, the compressed air tank is connected to a compressed air pipe 8, a compressed air regulating valve 6 is installed on the compressed air pipe, the compressed air pipe is connected to two η air pipes 12, both the η air pipe and the compressed air pipe are hard stainless steel air pipes, the η air pipe is inserted into the drum, and there is a gap between the η air pipe and the spiral wall-adhering track on the inner wall of the drum, which does not affect the rotation of the drum, the η air pipe is inserted into the drum, and a plurality of compression nozzles 5 are fixed on the air pipe.

[0012] In the method of drying pulverized coal based on centrifugation and compressed gas, a gear ring 11 is fixed to the outside of the drum, a power motor 2 is fixed to the platform frame, the output shaft end of the power motor is fixed to a drive gear 13, and the drive gear is meshed with the gear ring.

[0013] In the method for drying pulverized coal based on centrifugation and compressed gas, the inner wall of the drum is provided with a spiral wall-adhering track 3 .

[0014] Working principle: The coal entering the furnace has high humidity and high viscosity, and the gravity causes the coal to clump and stick together, affecting the normal operation of the pulverizing system; the coal entering the furnace is conveyed by a belt, and after being plowed by the coal plow 7, it falls into the drum 1. The power motor is started to drive the gear to rotate, and the driving gear engages with the gear ring, thereby driving the drum to rotate, generating centrifugal force to throw the coal entering the furnace away. The inner wall of the drum has a spiral wall-adhering track, which delays the amount of coal to directly enter the raw coal bin 10. After entering the drum, the power motor drives the drum to rotate, generating centrifugal force to throw the coal entering the furnace away. At the same time, the compressed air pressure regulating valve 6 is used to adjust the pressure, and the compressed air enters the η air pipe and is ejected through the compression nozzle. Under the action of compressed air and centrifugal force, the coal powder is dried.

Claims

1. A method for drying pulverized coal based on centrifugation and compressed gas, characterized by: The method comprises the following steps: (1) The coal fed into the furnace has high humidity and viscosity, which causes the coal to clump and stick together due to gravity, affecting the normal operation of the pulverizing system; (2) The incoming coal is conveyed by a belt and falls into the drum after being plowed by the coal plow. The power motor starts to drive the gear to rotate, and the driving gear meshes with the gear ring, thereby driving the drum to rotate and generating centrifugal force to throw the incoming coal away. (3) The inner wall of the drum is provided with a spiral track which delays the coal from entering the raw coal bin. After entering the drum, the power motor drives the drum to rotate, generating centrifugal force to throw the coal into the furnace away. At the same time, the pressure is adjusted by the compressed air pressure regulating valve. The compressed air enters the η air pipe and is ejected through the compression nozzle. Under the action of the compressed air and centrifugal force, the coal powder is dried.

2. The method for drying pulverized coal based on centrifugal and compressed gas according to claim 1, characterized in that: The roller is connected to the platform frame through a bearing, the compressed air tank is connected to the compressed air pipe, the compressed air pipe is connected to two η air pipes, the η air pipes are inserted into the roller, and multiple compression nozzles are fixed on the air pipes.

3. The method for drying pulverized coal based on centrifugal and compressed gas according to claim 2, characterized in that: A gear ring is fixed on the outside of the drum, a power motor is fixed on the platform frame, an output shaft end of the power motor is fixed to a driving gear, and the driving gear is meshed with the gear ring.

4. The method for drying pulverized coal based on centrifugal and compressed gas according to claim 3, characterized in that: The inner wall of the drum is provided with a spiral wall-adhering track.

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