CN216727501U

CN216727501U - Coal pulverizer with wind powder homogenization function

Info

Publication number: CN216727501U
Application number: CN202122574293.2U
Authority: CN
Inventors: 胡玉璋; 杜五一; 戚运韬; 杨平; 王朝林
Original assignee: Wenergy Hefei Power Generation Co ltd
Current assignee: Wenergy Hefei Power Generation Co ltd
Priority date: 2021-10-25
Filing date: 2021-10-25
Publication date: 2022-06-14
Anticipated expiration: 2031-10-25

Abstract

The utility model provides a coal mill with a wind powder homogenizing function, which comprises a shell, wherein a mounting plate is arranged in the shell, a grinding cover is arranged on the mounting plate, a powder grinding mechanism is arranged in the grinding cover, an air outlet pipe is arranged on the shell above the mounting plate, and a powder homogenizing mechanism for introducing powder into the grinding cover is arranged in the shell above the grinding cover; the material powder homogenizing mechanism comprises a first driving mechanism, a homogenizing rotor, a homogenizing stator, a feeding pipe, a discharging pipe, a first fixing plate, a second fixing plate and an air inlet assembly. The utility model improves the condition of uneven grinding of the wind powder, achieves the effect of fully mixing and homogenizing the wind powder mixture, and reduces the deviation of the wind powder mixture on the fineness and the concentration of the pulverized coal.

Description

Coal pulverizer with wind powder homogenization function

Technical Field

The utility model relates to a coal mill, in particular to a coal mill with a wind powder homogenizing function.

Background

When the existing coal mill carries coal powder to move in the coal mill by wind power, the existing coal mill has short retention time in the coal mill and simple movement path, so that the wind powder cannot be fully mixed. The air-powder mixture has a large deviation in the fineness and concentration of the pulverized coal, which still exists when entering the pulverized coal outlet pipe.

SUMMERY OF THE UTILITY MODEL

Based on the technical problems in the background art, the utility model provides a coal mill with a wind powder homogenizing function.

The utility model provides a coal mill with a wind powder homogenizing function, which comprises a shell, wherein a mounting plate is arranged in the shell, a grinding cover is arranged on the mounting plate, a powder grinding mechanism is arranged in the grinding cover, an air outlet pipe is arranged on the shell above the mounting plate, and a powder homogenizing mechanism for introducing powder into the grinding cover is arranged in the shell above the grinding cover;

the material powder homogenizing mechanism comprises a first driving mechanism, a homogenizing rotor, a homogenizing stator, a feeding pipe, a discharging pipe, a first fixing plate, a second fixing plate and an air inlet assembly; the feeding pipe is vertically arranged on the shell and penetrates through the shell, one end, located in the shell, of the feeding pipe is connected with a protective sleeve, one end, away from the feeding pipe, of the protective sleeve is connected with a first fixing plate, a shunting cone body coaxially arranged with the feeding pipe is installed at the top end of the first fixing plate, and a plurality of first blanking holes are formed in the first fixing plate in the circumferential direction around the shunting cone body; the homogenizing stator is arranged at the bottom end of the first fixing plate, the second fixing plate is arranged at the bottom end of the homogenizing stator and connected with the homogenizing stator, the bottom end of the second fixing plate is connected with a hopper, a discharging pipe and a feeding pipe are coaxially arranged, the discharging pipe is arranged at the bottom of the hopper and communicated with the hopper, and a plurality of second blanking holes communicated with the hopper are formed in the second fixing plate; the homogenizing rotor is arranged in the homogenizing stator and is driven to rotate by the first driving mechanism, and gaps between the homogenizing rotor and the homogenizing stator are correspondingly communicated with the first blanking holes and the second blanking holes; the air inlet assembly is installed on the shell and used for introducing air to the discharge pipe.

Preferably, the powder grinding mechanism comprises a grinding disc and a second driving mechanism, the mounting plate is located inside the grinding cover and is provided with an opening, the bottom end of the mounting plate is provided with a collecting box communicated with the opening, the grinding disc is arranged in the opening and is in clearance fit with the mounting plate, a plurality of air holes are formed in the grinding disc in a penetrating mode, and the second driving mechanism is mounted on the box body and is used for driving the grinding disc to rotate.

Preferably, the powder grinding mechanism further comprises a rotary table and a fixed rod, one end of the fixed rod is fixed on the shell, the other end of the fixed rod extends into the grinding cover, the rotary table is located above the grinding disc and rotatably mounted on the fixed rod, and a connecting rod is fixed at the bottom end of the rotary table and connected with the top end of the grinding disc.

Preferably, the air inlet assembly comprises an air inlet pipe, and the air inlet pipe is communicated with the discharge pipe.

Preferably, an air box is installed in the shell at a position below the installation plate, the air box is connected with an exhaust pipe, the exhaust pipe penetrates through the installation plate, the air box is further connected with an air guide pipe, the air guide pipe is connected with an air inlet pipe, and a regulating valve is arranged at the joint of the air guide pipe and the air inlet pipe.

Preferably, the first driving mechanism adopts a motor, the first driving mechanism is installed at the top end of the feeding pipe, an output shaft of the first driving mechanism sequentially penetrates through the air inlet pipe, the flow dividing cone and the first fixing plate to be connected with the homogenizing rotor, and the feeding pipe is connected with a material guide pipe.

Preferably, set up a plurality of reposition of redundant personnel chutes that extend to its bottom from its top on the reposition of redundant personnel cone, a plurality of reposition of redundant personnel chutes respectively with a plurality of first blanking holes one-to-one setting.

According to the coal mill with the air-powder homogenizing function, the material-powder homogenizing mechanism is arranged, the material powder enters the shunting cone body along with the feeding pipe, and the shunting cone body shunts the material powder, so that the blockage caused by the aggregation of the material powder is prevented; through utilizing guide duct, bellows and exhaust pipe, can make some wind-force of air-supply line directly get into bellows and blow to the material powder and grind the mechanism for the wind-powder mixture velocity of flow in the discharge tube reduces, has increased the grinding time, grinds more evenly, has improved the inhomogeneous situation of wind-powder grinding, makes the wind-powder mixture reach the effect of intensive mixing homogenization, has reduced the deviation that the wind-powder mixture exists on buggy fineness and buggy concentration.

Drawings

FIG. 1 is a schematic structural diagram of a coal pulverizer with a wind powder homogenizing function according to the present invention;

FIG. 2 is a schematic structural diagram of a material powder homogenizing mechanism in a coal mill with an air powder homogenizing function according to the present invention;

FIG. 3 is a partially exploded view of a powder homogenizing mechanism in a coal mill with an air powder homogenizing function according to the present invention;

fig. 4 is a schematic structural diagram of a material powder grinding mechanism in a coal mill with an air powder homogenizing function according to the present invention.

Detailed Description

Referring to fig. 1-4, the utility model provides a coal mill with a wind powder homogenizing function, which comprises a housing 1, wherein a mounting plate 2 is arranged in the housing 1, a grinding cover 3 is arranged on the mounting plate 2, a powder grinding mechanism is arranged in the grinding cover 3, an air outlet pipe 4 is arranged on the housing 1 above the mounting plate 2, and a powder homogenizing mechanism for introducing powder into the grinding cover 3 is arranged in the housing 1 above the grinding cover 3. The material powder homogenizing mechanism comprises a first driving mechanism 5, a homogenizing rotor 6, a homogenizing stator 7, a feeding pipe 8, a discharging pipe 9, a first fixing plate 10, a second fixing plate 11 and an air inlet assembly.

The inlet pipe 8 is vertical to be installed on casing 1 and to run through casing 1, inlet pipe 8 is located casing 1 one end and is connected with protective sheath 12, protective sheath 12 is kept away from 8 one end of inlet pipe and is connected with first fixed plate 10, the reposition of redundant personnel cone 13 with the coaxial setting of inlet pipe 8 is installed on first fixed plate 10 top, set up a plurality of reposition of redundant personnel chutes 30 that extend to its bottom from its top on the reposition of redundant personnel cone 13, a plurality of first blanking holes 14 have been seted up around reposition of redundant personnel cone 13 circumference on first fixed plate 10, a plurality of reposition of redundant personnel chutes 30 set up with a plurality of first blanking holes 14 one-to-one respectively.

Homogenization stator 7 is installed in first fixed plate 10 bottom, and second fixed plate 11 sets up in homogenization stator 7 bottom and is connected with

homogenization stator

7, and 11 bottom of second fixed plate are connected with hopper 15, and discharging pipe 9 and the coaxial setting of inlet pipe 8, discharging pipe 9 install in hopper 15 bottom and with hopper 15 intercommunication, set up a plurality of second blanking holes 16 with hopper 15 intercommunication on the second fixed plate 11.

The homogenizing rotor 6 is arranged inside the homogenizing stator 7 and is driven to rotate by the first driving mechanism 5, and the gap between the homogenizing rotor 6 and the homogenizing stator 7 is correspondingly communicated with the plurality of first blanking holes 14 and the plurality of second blanking holes 16. The air inlet assembly is arranged on the shell 1 and is used for introducing air into the discharge pipe 9. The first driving mechanism 5 adopts a motor, the first driving mechanism 5 is installed at the top end of the feeding pipe 8, an output shaft of the first driving mechanism 5 sequentially penetrates through the air inlet pipe 24, the diversion cone 13 and the first fixing plate 10 to be connected with the homogenizing rotor 6, and the feeding pipe 8 is connected with a material guide pipe 29.

In this embodiment, the powder grinding mechanism includes mill 17 and second actuating mechanism 18, and mounting panel 2 is located and grinds 3 internal positions of cover and has seted up the opening, and the collecting box 19 with the opening intercommunication is installed to mounting panel 2 bottom, and mill 17 sets up in the opening and mill 17 and mounting panel 2 clearance fit, runs through on the mill 17 and has seted up a plurality of bleeder vents 20, and second actuating mechanism 18 installs on the box and is used for driving mill 17 to rotate. The powder grinding mechanism further comprises a rotary table 21 and a fixed rod 22, one end of the fixed rod 22 is fixed on the shell 1, the other end of the fixed rod extends into the grinding cover 3, the rotary table 21 is located above the grinding disc 17 and rotatably installed on the fixed rod 22, and the bottom end of the rotary table 21 is fixedly provided with a connecting rod 23 and the connecting rod 23 is connected with the top end of the grinding disc 17.

In the exemplary embodiment, the intake assembly includes an intake duct 24, the intake duct 24 communicating with the discharge duct 9. An air box 25 is arranged in the shell 1 at a position below the mounting plate 2, the air box 25 is connected with an exhaust pipe 26, the exhaust pipe 26 penetrates through the mounting plate 2, the air box 25 is also connected with an air guide pipe 27, and the air guide pipe 27 is connected with the air inlet pipe 24 and the joint of the air guide pipe 27 and the air inlet pipe 24 is provided with a regulating valve 28.

When the material powder distribution device is used, the material powder is placed into the material guide pipe 29, slides into the feeding pipe 8 and is transmitted to the distribution cone 13, and is distributed through the distribution chutes 30 on the upper surface of the distribution cone 13, so that the material powder is prevented from being accumulated and blocked; then the material powder passes through the first blanking hole 14, the first driving mechanism 5 drives the homogenizing rotor 6 to rotate at the moment, meanwhile, the homogenizing stator 7 and the homogenizing rotor 6 are matched with each other in rotation to homogenize the material powder, finally, the material powder is discharged to the discharge pipe 9 through the second blanking hole 16 and the hopper 15, air is introduced to the discharge pipe through the air inlet pipe, and the air-powder mixture enters the grinding cover 3 along with the discharge pipe; the second driving mechanism 18 drives the grinding disc 17 to rotate to grind the air-powder mixture, so that the material powder can be fully ground, the particle size of the material powder is reduced, the combustion efficiency and the operation safety of a subsequent boiler are improved, and the method has a good application prospect.

According to the utility model, by utilizing the air guide pipe 27, the air box 25 and the exhaust pipe 26, part of wind power of the air inlet pipe 24 can directly enter the air box 25 and blow to the material powder grinding mechanism, so that the flow velocity of the air-powder mixture in the discharge pipe 9 is reduced, the grinding time is prolonged, the grinding is more uniform, the condition of uneven grinding of the air powder is improved, the effect of fully mixing and homogenizing the air-powder mixture is achieved, and the deviation of the air-powder mixture on the fineness of the pulverized coal and the concentration of the pulverized coal is reduced. According to the material powder grinding mechanism, the rotary disc 21 and the grinding disc 17 are arranged, the rotary disc 21 rotates along with the rotation of the grinding disc 17, and the air-powder mixture is ground in a mutually matched mode, so that the grinding efficiency and precision are effectively improved.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.

Claims

1. The coal mill with the air-powder homogenizing function is characterized by comprising a shell (1), wherein a mounting plate (2) is arranged in the shell (1), a grinding cover (3) is mounted on the mounting plate (2), a powder grinding mechanism is mounted in the grinding cover (3), an air outlet pipe (4) is mounted on the shell (1) above the mounting plate (2), and a powder homogenizing mechanism for introducing powder into the grinding cover (3) is mounted in the shell (1) above the grinding cover (3);

the material powder homogenizing mechanism comprises a first driving mechanism (5), a homogenizing rotor (6), a homogenizing stator (7), a feeding pipe (8), a discharging pipe (9), a first fixing plate (10), a second fixing plate (11) and an air inlet assembly; the feeding pipe (8) is vertically arranged on the shell (1) and penetrates through the shell (1), one end, located in the shell (1), of the feeding pipe (8) is connected with a protective sleeve (12), one end, far away from the feeding pipe (8), of the protective sleeve (12) is connected with a first fixing plate (10), a shunting cone (13) which is coaxial with the feeding pipe (8) is installed at the top end of the first fixing plate (10), and a plurality of first blanking holes (14) are formed in the first fixing plate (10) in the circumferential direction around the shunting cone (13); the homogenizing stator (7) is arranged at the bottom end of the first fixing plate (10), the second fixing plate (11) is arranged at the bottom end of the homogenizing stator (7) and is connected with the homogenizing stator (7), the bottom end of the second fixing plate (11) is connected with the hopper (15), the discharge pipe (9) and the feed pipe (8) are coaxially arranged, the discharge pipe (9) is arranged at the bottom of the hopper (15) and is communicated with the hopper (15), and a plurality of second blanking holes (16) communicated with the hopper (15) are formed in the second fixing plate (11); the homogenizing rotor (6) is arranged inside the homogenizing stator (7) and is driven to rotate by the first driving mechanism (5), and gaps between the homogenizing rotor (6) and the homogenizing stator (7) are correspondingly communicated with the first blanking holes (14) and the second blanking holes (16); the air inlet assembly is arranged on the shell (1) and is used for introducing air to the discharge pipe (9).

2. The coal mill with the air and powder homogenizing function according to claim 1, wherein the material and powder grinding mechanism comprises a grinding disc (17) and a second driving mechanism (18), an opening is formed in the mounting plate (2) which is located inside the grinding cover (3), a collecting box (19) communicated with the opening is mounted at the bottom end of the mounting plate (2), the grinding disc (17) is arranged in the opening, the grinding disc (17) is in clearance fit with the mounting plate (2), a plurality of air holes (20) are formed in the grinding disc (17) in a penetrating mode, and the second driving mechanism (18) is mounted on the box body and used for driving the grinding disc (17) to rotate.

3. The coal pulverizer with air and powder homogenizing function according to claim 2, wherein the powder grinding mechanism further comprises a rotary disc (21) and a fixed rod (22), one end of the fixed rod (22) is fixed on the casing (1) and the other end of the fixed rod extends into the grinding cover (3), the rotary disc (21) is positioned above the grinding disc (17) and rotatably mounted on the fixed rod (22), a connecting rod (23) is fixed at the bottom end of the rotary disc (21), and the connecting rod (23) is connected with the top end of the grinding disc (17).

4. The coal pulverizer with air and powder homogenizing function according to any one of claims 1-3, characterized in that the air inlet assembly comprises an air inlet pipe (24), and the air inlet pipe (24) is communicated with the discharge pipe (9).

5. The coal mill with the function of homogenizing the coal dust according to claim 4, characterized in that a wind box (25) is installed in the casing (1) at a position below the mounting plate (2), the wind box (25) is connected with a wind exhaust pipe (26), the wind exhaust pipe (26) penetrates through the mounting plate (2), the wind box (25) is further connected with a wind guide pipe (27), and the wind guide pipe (27) is connected with the wind inlet pipe (24) and is provided with a regulating valve (28).

6. The coal mill with the air and powder homogenizing function according to any one of claims 1 to 3, characterized in that the first driving mechanism (5) adopts a motor, the first driving mechanism (5) is installed at the top end of the feeding pipe (8), an output shaft of the first driving mechanism (5) sequentially penetrates through the air inlet pipe (24), the flow dividing cone (13) and the first fixing plate (10) to be connected with the homogenizing rotor (6), and the feeding pipe (8) is connected with a material guide pipe (29).

7. The coal mill with the air-powder homogenizing function according to any one of claims 1 to 3, wherein a plurality of diversion chutes (30) are formed in the diversion cone (13) and extend from the top end to the bottom end of the diversion cone, and the diversion chutes (30) are respectively arranged in one-to-one correspondence with the first blanking holes (14).