CN215940118U - Coal mill for thermal power generation - Google Patents
Coal mill for thermal power generation Download PDFInfo
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- CN215940118U CN215940118U CN202121629779.5U CN202121629779U CN215940118U CN 215940118 U CN215940118 U CN 215940118U CN 202121629779 U CN202121629779 U CN 202121629779U CN 215940118 U CN215940118 U CN 215940118U
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- power generation
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- 239000003245 coal Substances 0.000 title claims abstract description 63
- 238000010248 power generation Methods 0.000 title claims abstract description 20
- 238000000227 grinding Methods 0.000 claims abstract description 89
- 239000000843 powder Substances 0.000 claims abstract description 57
- 238000003801 milling Methods 0.000 claims abstract description 48
- 238000007599 discharging Methods 0.000 claims abstract description 42
- 238000001035 drying Methods 0.000 claims abstract description 17
- 238000007664 blowing Methods 0.000 claims abstract description 11
- 238000007789 sealing Methods 0.000 claims description 22
- 238000009423 ventilation Methods 0.000 claims description 10
- 239000004744 fabric Substances 0.000 claims 8
- 239000000463 material Substances 0.000 abstract description 49
- 230000000694 effects Effects 0.000 abstract description 10
- 238000010438 heat treatment Methods 0.000 abstract description 4
- 238000010298 pulverizing process Methods 0.000 abstract description 2
- 235000013312 flour Nutrition 0.000 description 8
- 239000003818 cinder Substances 0.000 description 7
- 238000005265 energy consumption Methods 0.000 description 2
- 235000012054 meals Nutrition 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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- Crushing And Grinding (AREA)
Abstract
The utility model relates to coal grinding equipment, in particular to a coal grinding machine for thermal power generation, which comprises a motor, a machine shell, a discharging device, a feeding device, a collecting seat and a grinding device, wherein the motor is arranged on the machine shell; the discharging device comprises a powder discharging rotary drum and a hot air blowing device, the powder discharging rotary drum is rotatably arranged on the machine shell and is connected with the motor, and the hot air blowing device is communicated with the powder discharging rotary drum; the feeding device is arranged at the top of the machine shell; the collecting seat is rotatably arranged in the machine shell and is fixedly connected with the powder discharging rotary cylinder; the grinding device is rotatably installed on the material collecting seat, the number of the grinding devices is not less than two, the grinding devices are arranged around the axis of the output cyclone cylinder in an annular array mode, the grinding devices are communicated with the output cyclone cylinder, the grinding devices are further connected with the machine shell and the output cyclone cylinder through gears, and the output cyclone cylinder drives the grinding devices to grind coal briquettes. The coal mill improves the milling efficiency of coal through the milling device with multiple stations, improves the drying effect through heating, can ensure the pulverizing efficiency, and can ensure the thermal dryness.
Description
Technical Field
The utility model relates to coal grinding equipment, in particular to a coal grinding machine for thermal power generation.
Background
During thermal power generation, chemical energy of fuel is converted into steam heat energy by burning coal, then the steam heat energy is converted into mechanical energy, and finally the mechanical energy is converted into electric energy.
When the coal burns, in order to make the coal carry out abundant burning, mill the coal cinder through with the coal pulverizer, grind the coal cinder, thereby increase and the area of contact of air guarantees the abundant of burning, current coal pulverizer when milling the coal cinder, the efficiency of milling of coal cinder is lower, and current coal cinder milling device is relatively poor to the drying effect of coal charge when using.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, the utility model provides a coal mill for thermal power generation, which has high milling efficiency and better drying effect, and the specific technical scheme is as follows:
the utility model provides a coal pulverizer for thermal power, includes the motor, still includes: a housing on which the motor is mounted; the discharging device comprises a powder discharging rotary drum and a hot air blowing device, the powder discharging rotary drum is rotatably arranged on the machine shell and is connected with the motor, and the hot air blowing device is communicated with the powder discharging rotary drum; the feeding device is arranged on the top of the machine shell; the material collecting seat is rotatably arranged in the machine shell and is fixedly connected with the powder discharging rotary cylinder; and the milling devices are rotatably arranged on the material collecting seat, are at least two and are arranged in an annular array around the axis of the powder discharging rotary cylinder, the milling devices are communicated with the powder discharging rotary cylinder, the milling devices are also connected with the machine shell and the powder discharging rotary cylinder through gears, and the powder discharging rotary cylinder drives the milling devices to mill coal briquettes.
Through adopting above-mentioned technical scheme, a plurality of mills devices form the multistation and grind the coal cinder simultaneously, have improved the efficiency of milling to blow in hot-blast air through hot-blast air device and get into the drying to the buggy after milling, owing to be dry to the powder, consequently drying rate is fast, and drying effect is good.
Preferably, the hot air blowing device includes: a blower mounted on the cabinet; and one end of the air supply pipe is rotatably connected with the bottom of the powder outlet rotary cylinder and is communicated with the air supply pipe.
Through adopting above-mentioned technical scheme, the blast pipe passes through rotary joint and is connected with a meal outlet rotary drum, does not influence the rotation of a meal outlet rotary drum.
Preferably, the feeding device comprises: a feed hopper mounted at the top of the enclosure; a feed pipe disposed below the feed hopper; and the spiral blade is arranged on the powder outlet rotary cylinder and is movably positioned in the feeding pipe.
Through adopting above-mentioned technical scheme, the feeder hopper is used for the storage, and helical blade realizes the ration and carries, avoids blockking up the clearance of milling, improves the stability of milling.
Preferably, the device further comprises a material distribution device, and the material distribution device comprises: the distributing cylinder is rotatably arranged in the machine shell and is arranged on the collecting seat, a plurality of feeding holes are formed in the bottom of the distributing cylinder in an array mode, and the distributing cylinder is communicated with the feeding device and the grinding device respectively; and the air inlet devices are arranged at the top of the distributing barrel in an annular array manner, and supply air into the distributing barrel to ensure that the coal blocks uniformly enter the grinding device through the feeding holes.
By adopting the technical scheme, the distributing device enables the coal briquettes to be uniformly fed into the grinding device, so that the grinding gap is prevented from being blocked, and the grinding stability is improved.
Further, the distributing cylinder comprises: the air distribution cylinder is arranged on the material collecting seat; the sealing cover is fixed at the top of the air distribution cylinder, and the air inlet device is installed on the sealing cover; the sealing plate is fixed on the sealing cover and is rotationally connected with the feed hopper; and the material distribution cover is fixed in the shell and positioned between the sealing cover and the grinding device, and a plurality of material feeding holes are arranged on the material distribution cover in an array mode.
Wherein, air inlet unit includes: the ventilating pipe is fixed at the top of the distributing barrel and communicated with the distributing barrel; the axial flow fan is arranged in the ventilation pipe; and the filter screen is fixed at the air inlet end of the ventilation pipe.
Further, the hot blast blowpipe apparatus still includes: and the air inlet electric heater is arranged on one side of the axial flow fan.
Through adopting above-mentioned technical scheme, the air inlet electric heater carries out preliminary heating to the coal cinder, improves drying effect.
Preferably, the milling device comprises: the grinding rotary cylinder is rotatably arranged on the material collecting seat; one end of the powder discharge pipe is rotatably arranged at the bottom of the grinding rotary cylinder, and the other end of the powder discharge pipe is communicated with the powder discharge rotary cylinder; a second toothed ring fixed to the milling rotor; the third gear ring is fixed on the machine shell and meshed with the second gear ring; the grinding roller is rotatably arranged in the grinding rotary cylinder, and a grinding gap is formed between the grinding roller and the grinding rotary cylinder; the grinding shaft is fixed on the grinding roller and penetrates through the material distribution device; a second gear fixed to the grinding shaft; and the third gear is fixed on the feeding device and is meshed with the second gear.
Through adopting above-mentioned technical scheme, a motor just can drive a plurality of milling device work, makes simple structure, has reduced the energy consumption to make and grind and take place the relative rotation between revolving cylinder and the roller of milling, and then improved the efficiency of milling.
Preferably, the milling device further comprises: and the drying electric heater is fixed in the grinding roller.
By adopting the technical scheme, the pulverized coal in the grinding process is heated, and the drying effect is improved.
The milling rotary cylinder is a conical cylinder, the milling roller is a conical roller, and the milling gap is gradually reduced from top to bottom.
Compared with the prior art, the utility model has the following beneficial effects:
according to the coal mill for thermal power generation, the milling efficiency of coal is improved through the multi-station milling device, the drying effect is improved through multi-channel heating, the pulverizing efficiency can be guaranteed, and meanwhile the thermal dryness can be guaranteed.
Drawings
FIG. 1 is a schematic structural view of a coal mill for thermal power generation;
fig. 2 is a sectional view of a coal mill for thermal power generation;
FIG. 3 is an enlarged cross-sectional view of the feeder and the material collection bed;
FIG. 4 is a schematic view of the assembly of the collecting base, the distributing device and the milling device;
FIG. 5 is a cross-sectional view of FIG. 4;
figure 6 is a schematic view of the assembly of the collecting base with the milling device;
fig. 7 is a schematic structural view of the milling apparatus.
Detailed Description
The utility model will now be further described with reference to the accompanying drawings.
As shown in fig. 1 to 7, a coal mill for thermal power generation comprises a motor 36, a casing 31, a discharging device, a feeding device, a material collecting seat 51 and a milling device; the motor 36 is mounted on the housing 31; the discharging device comprises a powder discharging rotary cylinder 10 and a hot air blowing device, the powder discharging rotary cylinder 10 is rotatably arranged on the machine shell 31 and is connected with the motor 36, and the hot air blowing device is communicated with the powder discharging rotary cylinder 10; the feeding device is arranged at the top of the machine shell 31; the collecting seat 51 is rotatably arranged in the machine shell 31 and is fixedly connected with the powder discharging rotary cylinder 10; the grinding devices are rotatably arranged on the material collecting seat 51, the number of the grinding devices is four, the grinding devices are arranged around the axis of the output cyclone cylinder 10 in an annular array mode, the grinding devices are communicated with the output cyclone cylinder 10, the grinding devices are further connected with the machine shell 31 and the output cyclone cylinder 10 through gears, and the output cyclone cylinder 10 drives the grinding devices to grind coal briquettes.
The multiple milling devices form multiple stations and mill coal briquettes at the same time, the milling efficiency is improved, hot air is blown in through the hot blast device to dry milled coal dust, and due to the fact that the powder is dried, the drying speed is high, and the drying effect is good.
Specifically, the top of the casing 31 is provided with an upper bracket 32, the bottom of the casing 31 is provided with a lower bracket 33, the lower bracket 33 is provided with a controller 34, and the controller 34 is a PLC controller.
The feeding device comprises a feed hopper 21, a feeding pipe 24 and a helical blade 23; the feed hopper 21 is installed on the top of the casing 31 through the upper bracket 32, the bottom of the feed hopper 21 is tapered, the feed pipe 24 is fixed on the bottom of the feed hopper 21 and is located at the center of the feed hopper 21, and the helical blade 23 is installed on the discharging cyclone 10 and is movably located in the feed pipe 24. The feed hopper 21 is used for storing materials, and the helical blades 23 realize quantitative conveying, so that the grinding gap 63 is prevented from being blocked, and the grinding stability is improved.
Three fixed rods 35 in an annular array are arranged at the top of the feed hopper 21, the fixed rods 35 are all connected with a connecting pipe 39, one end of the powder discharging rotary cylinder 10 is rotatably arranged in the connecting pipe 39 through a bearing, and the other end of the powder discharging rotary cylinder is rotatably arranged at the bottom of the shell 31 through a bearing. The powder discharging rotary drum 10 is movably inserted into the feeding pipe 24, and the helical blade 23 is fixed on the powder discharging rotary drum 10 and is attached to the feeding pipe 24. Go out powder rotary drum 10 top opening, the bottom is for leaking hopper-shaped, goes out the bottom of powder rotary drum 10 and is connected with discharge tube 14 through rotary joint, and discharge valve 15 is equipped with to the bottom of discharge tube 14.
The hot air blowing device comprises a blower 12 and an air supply pipe 13, wherein the blower 12 is arranged on the machine shell 31; one end of the blast pipe 13 is communicated with the blower 12, the other end is communicated with the discharge pipe 14, the blower 12 sends set high-pressure hot air into the powder discharging rotary drum 10 for discharging, and meanwhile, the pulverized coal is heated and dried.
The bottom of the powder discharging rotary cylinder 10 is provided with a first bevel gear ring 38, the motor 36 is provided with a first bevel gear 37, the first bevel gear 37 is meshed with the first bevel gear ring 38, and the motor 36 drives the powder discharging rotary cylinder 10 to rotate.
In some embodiments, the cyclone 10 is provided with a material guiding ring 16, and the material guiding ring 16 is conical and is located between the helical blade 23 and the aggregate seat 51 for scattering the coal blocks to the periphery to make the coal blocks distributed uniformly.
In some embodiments, the top of the connecting pipe 39 is provided with the powder outlet barrel 11, the powder outlet barrel 11 is a hollow barrel with two open ends, the powder outlet barrel 11 is rotatably connected with the connecting pipe 39 through a bearing, and the top of the powder outlet barrel 11 is provided with a flange which is used for being communicated with a pulverized coal using or receiving device. The powder outlet cylinder 11 is convenient to be connected with other equipment, so that the rotary powder outlet rotary cylinder 10 can work normally.
The material collecting seat 51 is provided with material guiding hoppers 52 and material guiding cylinders 53, the number of the material guiding hoppers 52 and the number of the material guiding cylinders 53 are the same as that of the grinding devices, namely, the material collecting seat 51 is provided with four material guiding hoppers 52 and material guiding cylinders 53, the material guiding cylinders 53 are fixed at the bottoms of the material guiding hoppers 52 and are communicated with the material guiding hoppers 52, the material guiding hoppers 52 are conical, the material guiding cylinders 53 are circular, the center of the material collecting seat 51 is provided with a fixing ring 54, and the fixing ring 54 is fixedly connected with the flour discharging rotary cylinder 10, so that the material collecting seat 51 can synchronously rotate along with the flour rotary cylinder 10. The material collecting base 51 is rotatably installed in the housing 31 through a bearing.
In order to improve the uniformity of the distribution, the grinding device can further comprise a distribution device, the distribution device comprises a distribution barrel and an air inlet device 45, the distribution barrel is rotatably arranged in the machine shell 31 and is arranged on the material collecting seat 51, a plurality of feeding holes 421 are arranged at the bottom of the distribution barrel in an array mode, and the distribution barrel is respectively communicated with the feeding device and the grinding device; the air inlet devices 45 are arranged at the top of the distributing cylinder in an annular array, and supply air into the distributing cylinder to ensure that the coal blocks uniformly enter the grinding device through the feeding holes 421. The distributing device enables the coal briquettes to be uniformly fed into the grinding device, so that the grinding gap 63 is prevented from being blocked, and the grinding stability is improved.
The distributing barrel comprises a distributing barrel 43, a sealing cover 41, a sealing plate 44 and a distributing cover 42; the air distribution cylinder 43 is a hollow cylinder, and the bottom of the air distribution cylinder 43 is fixed on the material collecting seat 51 and is arranged coaxially with the material collecting seat 51; the sealing cover 41 is a frustum-shaped housing, the sealing cover 41 is fixed at the top of the air distribution cylinder 43, and the air inlet device 45 is installed on the sealing cover 41; the sealing plate 44 is an annular plate, and the sealing plate 44 is fixed on the sealing cover 41 and is rotationally connected with the feeding pipe 24; the material distributing cover 42 is a frustum-shaped cover, the material distributing cover 42 is fixed in the machine shell 31 and is located between the sealing cover 41 and the grinding device, and a plurality of feeding holes 421 are arranged on the material distributing cover 42 in an array manner. The angle between the feeding hole 421 and the horizontal plane is 45 degrees, so that the coal blocks are uniformly fed onto the aggregate seat 51.
The air intake device 45 comprises a ventilation pipe, an axial flow fan and a filter screen; the ventilation pipe is fixed on the top of the sealing cover 41 and is parallel to the axis of the feeding hole 421; the axial flow fan is arranged in the ventilation pipe; the filter screen is fixed at the air inlet end of the ventilation pipe.
In some embodiments, the air intake device 45 further comprises: and the air inlet electric heater is arranged on one side of the axial flow fan. The wind power heater is used for primarily heating the coal briquettes, so that the drying effect is improved.
The grinding device comprises a grinding rotary cylinder 61, a powder discharge pipe 67, a second gear ring 66, a third gear ring 72, a grinding roller 62, a grinding shaft 64, a second gear 65 and a third gear 71; the milling rotary cylinder 61 is a hollow inverted cone with two open ends, and the milling rotary cylinder 61 is rotatably mounted on the material guide cylinder 53 of the material collecting seat 51 through a bearing; one end of the powder discharge pipe 67 is rotatably arranged at the bottom of the milling rotary cylinder 61 through a rotary joint, and the other end of the powder discharge pipe 67 is communicated with the powder discharge rotary cylinder 10; the second gear ring 66 is an external gear ring, and the second gear ring 66 is fixed on the top of the milling rotary cylinder 61; the third gear ring 72 is an internal gear ring, and the third gear ring 72 is fixed in the machine shell 31 and meshed with the second gear ring 66; the grinding roller 62 is conical, the grinding roller 62 is rotatably arranged in the grinding rotary cylinder 61 and is coaxial with the grinding rotary cylinder 61, a grinding gap 63 is arranged between the grinding roller 62 and the surface of the grinding rotary cylinder 61 opposite to each other, the gap width of the grinding gap 63 is gradually reduced from top to bottom, so that gradual grinding is realized, and coal blocks are ground into coal powder from large to small; a grinding shaft 64 fixed to the grinding roller 62 and passing through the seal plate 44; a second gear 65 is fixed to the grinding shaft 64 above the seal plate 44; a third gear 71 is fixed to the feed tube 24 and is in meshing engagement with the second gear 65.
One motor 36 can drive a plurality of milling devices to work, so that the structure is simple, the energy consumption is reduced, and the milling rotary cylinder 61 and the milling roller 62 rotate relatively, thereby improving the milling efficiency.
In certain embodiments, the milling apparatus further comprises a dry electric heater secured within the interior of the grinding roll 62. The drying electric heater can adopt an electric heating pipe to heat the pulverized coal during grinding, so that the drying effect is improved.
When the device works, the hot air blower ventilates the interior of the flour discharging rotary cylinder 10 in a set state, the motor 36 drives the flour discharging rotary cylinder 10 to rotate at a set speed, the flour discharging rotary cylinder 10 drives the material collecting seat 51 to rotate, the milling rotary cylinder 61 is driven to rotate through the second gear ring 66 and the third gear ring 72, the flour discharging rotary cylinder 10 simultaneously drives the milling roller 62 to rotate through the second gear 65 and the third gear 71, the revolution and the rotation of the milling roller 62 and the milling rotary cylinder 61 are realized, in addition, when the flour discharging rotary cylinder 10 moves, the spiral blades 23 downwards convey materials at a set speed, coal blocks in the feeding hopper 21 are uniformly conveyed onto the material collecting seat 51 through the material distributing device, the coal blocks entering the material collecting seat 51 are further divided into the four material guide hoppers 52 under the action of gravity, the coal blocks enter the material guide cylinders 53 through the four material guide hoppers 52 and enter the gaps 63 of the four milling devices, the coal rollers 62 and the milling rotary cylinder 61 are used for discharging the milled coal powder into the flour discharging rotary cylinder 10, is discharged through the powder outlet barrel 11 under the action of the wind power of the blower 12.
The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the utility model and should not be construed in any way as limiting the scope of the utility model. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive step, which shall fall within the scope of the appended claims.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121629779.5U CN215940118U (en) | 2021-07-16 | 2021-07-16 | Coal mill for thermal power generation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121629779.5U CN215940118U (en) | 2021-07-16 | 2021-07-16 | Coal mill for thermal power generation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215940118U true CN215940118U (en) | 2022-03-04 |
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ID=80437469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121629779.5U Active CN215940118U (en) | 2021-07-16 | 2021-07-16 | Coal mill for thermal power generation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215940118U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113413961A (en) * | 2021-07-16 | 2021-09-21 | 苏州西热节能环保技术有限公司 | Coal mill for thermal power generation |
| CN115007044A (en) * | 2022-04-28 | 2022-09-06 | 安徽紫山农业科技有限公司 | A kind of modified starch mixer and using method thereof |
-
2021
- 2021-07-16 CN CN202121629779.5U patent/CN215940118U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113413961A (en) * | 2021-07-16 | 2021-09-21 | 苏州西热节能环保技术有限公司 | Coal mill for thermal power generation |
| CN113413961B (en) * | 2021-07-16 | 2024-11-15 | 苏州西热节能环保技术有限公司 | Coal mill for thermal power generation |
| CN115007044A (en) * | 2022-04-28 | 2022-09-06 | 安徽紫山农业科技有限公司 | A kind of modified starch mixer and using method thereof |
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