WO2017143543A1

WO2017143543A1 - Novel coal grinding device for thermal power system of power plant

Info

Publication number: WO2017143543A1
Application number: PCT/CN2016/074488
Authority: WO
Inventors: 马骏
Original assignee: 马骏
Priority date: 2016-02-24
Filing date: 2016-02-24
Publication date: 2017-08-31

Abstract

A coal grinding device for a thermal power system of a power plant comprises a housing (4), a coal inlet and outlet mechanism disposed above the housing (4), a first driving mechanism disposed below the housing (4), and a grinding mechanism and a second driving mechanism both disposed in the housing (4). Both the first driving mechanism and the second driving mechanism are in transmission connection with the grinding mechanism. In the coal grinding device for a thermal power system of a power plant, a curved surface is disposed on one side of each auxiliary grinding plate (22) close to each first grinding roller (19), so that the grinding area of the first grinding rollers (19) and the auxiliary grinding plates (22) can be greatly increased, thereby improving the grinding efficiency of the device. In addition, a plurality of second grinding rollers (21) is disposed at the bottom of each first grinding roller (19), so that grinding is carried between the second grinding rollers (21) and the grinding discs, so as to fully grind coal briquettes, thereby improving the grinding reliability.

Description

A new type of coal grinding equipment for power plant thermal power system

Technical field

The invention relates to a novel coal grinding device for a thermal power system of a power plant.

Background technique

As modern industry develops faster and faster, people's demand for energy is also increasing. Since coal and other resources are non-renewable energy sources, how to improve their utilization rate is a research direction of industrial energy utilization.

In the prior art, when coal is burned, it needs to be pulverized to ensure sufficient combustion of the coal. In the current milling equipment, the coal is ground by grinding the coal between the grinding roller and the grinding disc; however, due to the limited grinding area between the grinding roller and the grinding disc, the grinding is greatly reduced. The efficiency and reliability of grinding into powder reduces the practicality of the equipment.

Summary of the invention

The technical problem to be solved by the present invention is to provide a novel coal grinding device for a thermal power system of a power plant in order to overcome the disadvantages of low grinding efficiency and low reliability of grinding in the prior art.

The technical solution adopted by the present invention to solve the technical problem thereof is: a novel coal grinding device for a thermal power system of a power plant, comprising a casing, an inlet and outlet coal mechanism disposed above the casing, a first driving mechanism disposed under the casing, and a setting a grinding mechanism and a second driving mechanism in the outer casing, wherein the first driving mechanism and the second driving mechanism are both connected to the grinding mechanism;

The inlet and outlet coal mechanism comprises a raw coal feed port, two pulverized coal outlets and two separators, the quantity of the pulverized coal outlets being consistent with one-to-one correspondence with the number of separators, the separator and the corresponding pulverized coal outlet Connected

The first driving mechanism includes a first driving motor, a first driving shaft disposed vertically upward, and a first screw mechanism, and the first driving motor is coupled to the first driving shaft through the first screw mechanism Connecting, the first drive shaft is connected to the grinding mechanism;

The second driving mechanism includes a second driving motor, a second driving shaft disposed vertically upward, a second screw mechanism, a connecting rod and a horizontally disposed support frame, and the second screw mechanism is disposed on the second driving shaft The second driving motor is drivingly connected to the second screw machine through the second driving shaft, and the second screw mechanism is drivingly connected to the support frame through the connecting rod;

The grinding mechanism includes a grinding disc and two grinding assemblies disposed under the support frame, the grinding assembly being symmetrical about a central axis of the grinding disc, the grinding assembly including a fixed shaft horizontally disposed in the housing, and a grinding fixedly coupled to the fixed shaft An auxiliary disk, a third driving motor disposed vertically downward, a third driving shaft, a horizontally disposed first grinding roller, and a plurality of second grinding rollers disposed at a bottom of the first grinding roller, the third driving motor being disposed on the support Below the rack, the third drive motor is drivingly coupled to the first grinding roller via a third drive shaft, and the first grinding roller and the second grinding roller are fixedly coupled to the bracket.

Preferably, the DC motor is characterized by a strong driving capability, thereby ensuring reliability of the device, and the first driving motor and the second driving motor are both DC motors.

Preferably, in order to further filter the pulverized coal to improve the reliability of the apparatus, the pulverized coal outlet is provided with a filter.

Preferably, the third drive motor is a DC servo motor.

Preferably, in order to improve the practicability and reliability of the device, and at the same time to improve the intelligence of the device, a central control device is disposed in the outer casing, the central control device is a PLC, and the central control device is provided with a wireless communication module. And working power modules.

Preferably, in order to improve the sustainable working ability of the device, a battery is disposed in the outer casing, and the battery is electrically connected to the working power module.

Advantageously, said wireless communication module transmits a wireless signal via WIFI.

Preferably, the grinding auxiliary disk is provided with a curved surface on a side close to the first grinding roller.

Preferably, one side of the outer casing is provided with an air inlet duct, and the air inlet duct is located below the grinding disc.

The invention has the beneficial effects that in the new coal grinding equipment for the thermal power system of the power plant, the surface of the grinding auxiliary disk adjacent to the first grinding roller is provided with a curved surface, thereby greatly increasing the first grinding roller and the grinding auxiliary disk. Grinding area, thereby improving the grinding efficiency of the device; at the same time, a plurality of second grinding rolls are arranged at the bottom of the first grinding roll, so that the grinding between the second grinding roll and the grinding plate is performed, and the coal block is sufficiently ground, thereby improving The reliability of the grinding of the equipment.

DRAWINGS

The invention will now be further described with reference to the drawings and embodiments.

1 is a schematic structural view of a novel coal grinding apparatus for a power plant thermal power system of the present invention;

2 is a schematic structural view of a grinding mechanism of a novel coal grinding device for a power plant thermal power system of the present invention;

3 is a schematic structural view of a pulverized coal outlet of a novel coal grinding device for a power plant thermal power system of the present invention;

In the figure: 1. raw coal feed port, 2. pulverized coal outlet, 3. separator, 4. outer casing, 5. support frame, 6. connecting rod, 7. second screw mechanism, 8. second drive shaft, 9. Second drive motor, 10. Grinding assembly, 11. Inlet duct, 12. Grinding disc, 13. First screw mechanism, 14. First drive motor, 15. First drive shaft, 16. Fixed shaft, 17 Third drive motor, 18. third drive shaft, 19. first grinding roller, 20. bracket, 21. second grinding roller, 22. grinding auxiliary disk, 23. filter.

detailed description

The invention will now be described in further detail with reference to the drawings. The drawings are simplified schematic diagrams, and only the basic structure of the present invention is illustrated in a schematic manner, and thus only the configurations related to the present invention are shown.

As shown in FIG. 1 to FIG. 3, a novel coal grinding device for a thermal power system of a power plant includes a casing 4, an inlet and outlet coal mechanism disposed above the casing 4, a first driving mechanism disposed under the casing 4, and a setting a grinding mechanism and a second driving mechanism in the outer casing 4, wherein the first driving mechanism and the second driving mechanism are both connected to the grinding mechanism;

The inlet and outlet coal mechanism comprises a raw coal feed port 1, two pulverized coal outlets 2 and two separators 3, the number of the pulverized coal outlets 2 being identical to and corresponding to the number of separators 3, the separator 3 Connected to the corresponding pulverized coal outlet 2;

The first driving mechanism includes a first driving motor 14, a first driving shaft 15 disposed vertically upward, and a first screw mechanism 13, the first driving motor 14 passing through the first screw mechanism 13 and the first driving shaft 15 drive connection, the first drive shaft 15 is drivingly connected with the grinding mechanism;

The second drive mechanism includes a second drive motor 9, a second drive shaft 8 disposed vertically upward, a second screw mechanism 7, a connecting rod 6 and a horizontally disposed support frame 5, the second screw mechanism 7 Disposed at the top end of the second drive shaft 8, the second drive motor 9 is drivingly coupled to the second screw machine 7 via the second drive shaft 8, and the second screw mechanism 7 is driven by the connecting rod 6 and the support frame 5. connection;

The grinding mechanism comprises a grinding disc 12 and two grinding assemblies 10 disposed below the support frame 5, the grinding assembly 10 being symmetrical about a central axis of the grinding disc 12, the grinding assembly 10 comprising a stationary shaft horizontally disposed within the housing 4. 16. A grinding auxiliary disk 22 fixedly coupled to the fixed shaft 16, a third driving motor 17 disposed vertically downward, a third driving shaft 18, a horizontally disposed first grinding roller 19, and a plurality of disposed at the bottom of the first grinding roller 19 a second grinding roller 21, the third driving motor 17 is disposed below the support frame 5, and the third driving motor 17 is drivingly coupled to the first grinding roller 19 via a third driving shaft 18, the first grinding roller A bracket 20 is fixedly coupled to the second grinding roller 21.

Preferably, the DC motor is characterized by a strong driving capability, thereby ensuring reliability of the device, and the first drive motor 14 and the second drive motor 9 are both DC motors.

Preferably, in order to further filter the pulverized coal to improve the reliability of the equipment, the pulverized coal is discharged The port 2 is provided with a filter 23.

Preferably, the third drive motor 17 is a DC servo motor.

Preferably, in order to improve the usability and reliability of the device and at the same time to improve the intelligence of the device, the outer casing 4 is provided with a central control device, the central control device is a PLC, and the central control device is provided with wireless communication. Module and working power module.

Preferably, in order to improve the sustainable working ability of the device, a battery is disposed in the outer casing 4, and the battery is electrically connected to the working power module.

Preferably, the polishing auxiliary disk 22 is provided with a curved surface on a side close to the first grinding roller 19.

Preferably, one side of the outer casing 4 is provided with an air inlet duct 11 which is located below the grinding disc 12.

The working principle of the new coal grinding equipment for the thermal power system of the power plant is that the grinding roller is driven by the grinding wheel 12 driven by the first driving shaft 15 to perform the grinding operation. After the coal block falls into the grinding disc 12 through the raw coal feed port 1, the centrifugal force generated by the rotating grinding disc 12 is sent to the first grinding roller 19 and the grinding auxiliary disc 22 for grinding; at the same time, during the re-conveying process, The grinding reliability is improved, and the coal block is ground by the grinding between the second grinding roller 21 and the grinding disc 12; then the grinding disc 12 is further driven down by the first driving shaft 15, and the coal powder is left due to centrifugal force. The grinding disc 12, and then the hot air blown by the air inlet duct 11 blows the pulverized coal into the separator 3 for separation, and the pulverized coal that has reached the required pulverized coal will be discharged from the pulverized coal outlet 2, and the pulverized coal that has not reached the requirement will be returned. On the grinding wheel 12, the grinding is continued. In order to increase the efficiency of the polishing, the curved auxiliary disk 22 is provided with a curved surface on the side close to the first grinding roller 19, whereby the polishing area of the first grinding roller 19 and the polishing auxiliary disk 22 can be greatly increased, thereby improving the polishing efficiency. Wherein, the third driving motor 17 drives the rotation of the first grinding roller 19 through the third driving shaft 18, so that not only the first grinding roller 19 and the grinding auxiliary disk 22 can be ground, but also the second grinding roller 21 and the grinding disc can be ensured. Grinding is performed between 12; the fixed shaft 16 is used to fix the grinding auxiliary disk 22 to ensure the reliability of grinding of the first grinding roller 19 and the grinding auxiliary disk 22; the first driving motor 14 controls the operation of the first screw mechanism 13 The rotation and lifting of the grinding wheel 12 can be realized. When the second driving motor 9 controls the second screw mechanism 7 via the second driving shaft 8, the lifting and lowering of the support frame 5 can be achieved.

Compared with the prior art, in the new coal grinding equipment for the thermal power system of the power plant, the side of the grinding auxiliary disk 22 adjacent to the first grinding roller 19 is provided with a curved surface, so that the first grinding roller 19 can be greatly increased. Grinding the grinding area of the auxiliary disk 22, thereby improving the grinding efficiency of the apparatus; meanwhile, a plurality of second grinding rolls 21 are disposed at the bottom of the first grinding roll 19, so that the second grinding roll 21 and the grinding wheel 12 are ground to the coal The block is sufficiently ground to improve the reliability of the grinding of the device.

In view of the above-described embodiments of the present invention, various changes and modifications may be made by those skilled in the art without departing from the scope of the invention. The technical scope of the present invention is not limited to the contents of the specification, and the technical scope thereof must be determined according to the scope of the claims.

Claims

A novel coal grinding device for a thermal power system of a power plant, characterized in that it comprises a casing (4), an inlet and outlet coal mechanism disposed above the casing (4), a first driving mechanism disposed under the casing (4), and a setting a grinding mechanism and a second driving mechanism in the outer casing (4), wherein the first driving mechanism and the second driving mechanism are both drivingly connected to the grinding mechanism;

The inlet and outlet coal mechanism comprises a raw coal feed port (1), two pulverized coal outlets (2) and two separators (3), the number of the pulverized coal outlets (2) being the same as the number of separators (3) And one-to-one correspondence, the separator (3) is connected to the corresponding pulverized coal outlet (2);

The first drive mechanism includes a first drive motor (14), a first drive shaft (15) disposed vertically upwardly, and a first screw mechanism (13), the first drive motor (14) passing the first spiral a screw mechanism (13) is drivingly coupled to the first drive shaft (15), and the first drive shaft (15) is drivingly coupled to the grinding mechanism;

The second drive mechanism includes a second drive motor (9), a second drive shaft (8) disposed vertically upward, a second screw mechanism (7), a connecting rod (6), and a horizontally disposed support frame (5) The second screw mechanism (7) is disposed at the top end of the second drive shaft (8), and the second drive motor (9) passes through the second drive shaft (8) and the second screw mechanism (7) a transmission connection, the second screw mechanism (7) is drivingly connected to the support frame (5) through a connecting rod (6);

The grinding mechanism comprises a grinding disc (12) and two grinding assemblies (10) disposed below the support frame (5), the grinding assembly (10) being symmetrical about a central axis of the grinding disc (12), the grinding assembly (10) a fixing shaft (16) horizontally disposed in the casing (4), a grinding auxiliary disk (22) fixedly coupled to the fixed shaft (16), a third driving motor (17) disposed vertically downward, and a third a drive shaft (18), a horizontally disposed first grinding roller (19) and a plurality of second grinding rollers (21) disposed at a bottom of the first grinding roller (19), the third driving motor (17) being disposed on the support frame Below (5), the third drive motor (17) is drivingly coupled to the first grinding roller (19) via a third drive shaft (18), the first grinding roller (19) and the second grinding roller (21) A bracket (20) is fixedly attached.
A novel coal grinding apparatus for a thermal power plant of a power plant according to claim 1, wherein said first drive motor (14) and said second drive motor (9) are both DC motors.
A novel coal grinding device for a thermal power plant of a power plant according to claim 1, characterized in that the pulverized coal outlet (2) is provided with a filter (23).
A novel coal grinding apparatus for a thermal power plant of a power plant according to claim 1, wherein said third drive motor (17) is a DC servo motor.
A novel coal grinding device for a power plant thermal power system according to claim 1, wherein a central control device is provided in the outer casing (4), and the central control device is a PLC, and the central control device is It has a wireless communication module and a working power module.
A novel coal grinding device for a power plant thermal power system according to claim 5, wherein a battery is disposed in the casing (4), and the battery is electrically connected to the working power module.
A novel coal grinding apparatus for a power plant thermal power system according to claim 5, wherein said wireless communication module transmits a wireless signal via WIFI.
A novel coal grinding apparatus for a power plant thermal power system according to claim 5, wherein a surface of the grinding auxiliary disk (22) adjacent to the first grinding roll (19) is provided with a curved surface.
A novel coal grinding device for a power plant thermal power system according to claim 5, characterized in that one side of the outer casing (4) is provided with an air inlet duct (11), and the air inlet duct (11) is located Under the grinding disc (12).