CN119098263A - A coal mill for thermal power generation - Google Patents
A coal mill for thermal power generation Download PDFInfo
- Publication number
- CN119098263A CN119098263A CN202411474449.1A CN202411474449A CN119098263A CN 119098263 A CN119098263 A CN 119098263A CN 202411474449 A CN202411474449 A CN 202411474449A CN 119098263 A CN119098263 A CN 119098263A
- Authority
- CN
- China
- Prior art keywords
- coal
- grinding
- grinding cylinder
- discharge port
- power generation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/02—Feeding devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
- B02C2015/002—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs combined with a classifier
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Crushing And Grinding (AREA)
Abstract
本发明提供一种火力发电用磨煤机，用于解决在对煤炭进行研磨时，未区分煤炭大小的问题，其包括磨粉机构设置在磨粉筒内，磨粉机构用于将磨粉筒内的煤块进行研磨；筛选机构设置在磨粉筒上，其包括进料口、第一出料口和第二出料口；第一出料口与磨粉筒连接，磨粉筒还包括第三出料口，第二出料口与第三出料口连接；筛选机构用于煤炭中的煤块通过第一出料口传送到磨粉筒内；筛选机构还用于将煤碳中的煤炭颗粒通过第二出料口传送到第三出料口内；通过在磨煤机上设置有筛选机构，将煤炭中的细小颗粒在进入磨煤机之前筛选出来，减少磨粉机构的负担，另外，筛选机构的第二出料口和墨粉筒的第三出料口连接，将煤炭的细小颗粒都通过一个出料口传输出来，便于收集。
The present invention provides a coal mill for thermal power generation, which is used to solve the problem of not distinguishing the size of coal when grinding it. The coal mill comprises a grinding mechanism arranged in a grinding cylinder, and the grinding mechanism is used to grind the coal blocks in the grinding cylinder; a screening mechanism is arranged on the grinding cylinder, and comprises a feed port, a first discharge port and a second discharge port; the first discharge port is connected to the grinding cylinder, and the grinding cylinder also comprises a third discharge port, and the second discharge port is connected to the third discharge port; the screening mechanism is used to transfer the coal blocks in the coal into the grinding cylinder through the first discharge port; the screening mechanism is also used to transfer the coal particles in the coal to the third discharge port through the second discharge port; by arranging the screening mechanism on the coal mill, the fine particles in the coal are screened out before entering the coal mill, thereby reducing the burden of the grinding mechanism; in addition, the second discharge port of the screening mechanism is connected to the third discharge port of the toner cylinder, and the fine particles of the coal are all transferred out through one discharge port, which is convenient for collection.
Description
Technical Field
The invention belongs to the field of thermal power generation, and particularly relates to a coal mill for thermal power generation.
Background
Electric power is an energy source taking electric energy as power, and thermal power generation is a main method for producing electric energy in China. When generating electricity, three types of energy conversion processes exist in thermal power generation by utilizing heat energy generated when combustible materials are combusted in a boiler, namely fuel chemical energy, steam heat energy, mechanical energy and electric energy, namely, fuel is utilized to generate heat, water is heated to form high-temperature and high-pressure superheated steam, then the steam enters a steam turbine along a pipeline to continuously expand and do work, the steam turbine rotor is impacted to rotate at a high speed, the generator rotor (electromagnetic field) is driven to rotate, a stator coil cuts magnetic force lines to generate electric energy, and the electric energy is then utilized to rise to a system voltage and is connected with the system in a grid mode to deliver the electric energy outwards.
Coal is generally used for thermal power generation, when the coal is transported from a coal plant to a thermal power station, the size of the coal is uneven, the coal is very much coal, and when the coal is burnt in a boiler, the coal is difficult to fully burn, so before the coal is put into the boiler, the coal is required to be ground, namely the coal is ground into smaller coal particles, so that the coal is fully burnt.
When the existing coal mill is used, regardless of the size of coal, the coal mill can be uniformly put into the coal mill for grinding, and after grinding is finished, the coal is fed into a next working procedure through a coal outlet at the bottom of the coal mill or is directly transmitted into a boiler. However, this method can achieve grinding of coal into smaller particles, but the coal transported from the coal mill has not only coal briquettes but also particles that can be burned without grinding, and if the whole is put into a grinder, the burden of the coal mill is increased, and the efficiency of thermal power generation is reduced.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a coal mill for thermal power generation, which is used for solving the problem that the coal size is not differentiated when the coal is ground in the prior art.
In order to achieve the aim and other related aims, the invention provides a coal mill for thermal power generation, which comprises a milling drum, a milling mechanism and a screening mechanism, wherein the milling mechanism is arranged in the milling drum and is used for milling coal blocks in the milling drum, the screening mechanism is arranged on the milling drum and comprises a feed inlet, a first discharge hole and a second discharge hole, the first discharge hole is connected with the milling drum, the milling drum further comprises a third discharge hole, the second discharge hole is connected with the third discharge hole, the screening mechanism is used for conveying the coal blocks in coal into the milling drum through the first discharge hole, and the screening mechanism is also used for conveying coal particles in coal into the third discharge hole through the second discharge hole.
Optionally, the screening mechanism comprises a screen, wherein the screen is arranged at the bottom of the feeding hole, and an included angle formed by a straight line perpendicular to the screen and the central axis of the grinding drum is an acute angle.
Optionally, the grinding cylinder further comprises a disturbance mechanism, wherein the disturbance mechanism is used for disturbing the coal blocks in the grinding cylinder.
The stirring mechanism comprises a driving piece, a transmission piece and a stirring piece, wherein the driving piece is arranged outside the grinding barrel, the stirring piece is arranged in the grinding barrel, and the driving piece drives the stirring piece to move through the transmission piece.
Optionally, the disturbance is rotatably connected to an inner sidewall of the mill barrel.
Optionally, the disturbance piece is provided with a connecting piece, the connecting piece is provided with a through hole, the transmission piece is provided with a rotating shaft, and the transmission piece is connected to the through hole through the rotating shaft.
Optionally, a blocking member is further disposed in the grinding barrel, and the connection end of the disturbing member and the grinding barrel is disposed in an included angle formed by the blocking member and the inner side wall of the grinding barrel.
Optionally, the coal mill further comprises a base and a water spraying mechanism, wherein the water spraying mechanism comprises a water tank, a water pump and a water inlet pipe, the water tank is arranged on the base, one end of the water pump is connected with the water tank, the other end of the water pump is connected with the water inlet pipe, the water inlet pipe is arranged in the grinding barrel, and the water pump is used for spraying water in the water tank onto coal blocks in the grinding barrel through the water inlet pipe.
Optionally, the sprinkling mechanism comprises a plurality of sprinklers, and the sprinklers are symmetrically arranged on the inner side wall of the grinding drum.
Optionally, the grinding mechanism comprises a grinding head, a plurality of water spray holes are formed in the grinding head, and the water inlet pipe is connected with the water spray holes.
The coal mill for thermal power generation has the advantages that the screening mechanism is arranged on the coal mill, fine particles in coal are screened out before entering the coal mill, the burden of the grinding mechanism is reduced, in addition, the second discharging hole of the screening mechanism is connected with the third discharging hole of the toner cartridge, and the fine particles of the coal are conveyed out through one discharging hole, so that the coal mill is convenient to collect.
Drawings
Fig. 1 shows a schematic structure of a coal mill according to the invention.
Fig. 2 shows a schematic top view of the coal pulverizer of the present invention.
Fig. 3 shows a cross-sectional view taken along A-A in fig. 2.
Detailed Description
Further advantages and effects of the present invention will become apparent to those skilled in the art from the disclosure of the present invention, which is described by the following specific examples.
Please refer to all the following figures. It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the invention to the extent that it can be practiced, since modifications, changes in the proportions, or adjustments of the sizes, which are otherwise, used in the practice of the invention, are included in the spirit and scope of the invention which is otherwise, without departing from the spirit or scope thereof. Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely for descriptive purposes and are not intended to limit the scope of the invention, but are intended to provide relative positional changes or modifications without materially altering the technical context in which the invention may be practiced.
The following examples are given by way of illustration only. Various embodiments may be combined and are not limited to only what is presented in the following single embodiment.
Referring to fig. 1-3, the invention provides a coal mill for thermal power generation, which comprises a grinding drum 1, a grinding mechanism 2 and a screening mechanism 3, wherein the grinding mechanism 2 is arranged in the grinding drum 1, the grinding mechanism 2 is used for grinding coal blocks in the grinding drum 1, the screening mechanism 3 is arranged on the grinding drum 1 and comprises a feed port 31, a first discharge port 32 and a second discharge port 33, the first discharge port 32 is connected with the grinding drum 1, the grinding drum 1 further comprises a third discharge port 11, the second discharge port 33 is connected with the third discharge port 11, the screening mechanism 3 is used for conveying the coal blocks in coal into the grinding drum 1 through the first discharge port 32, and the screening mechanism 3 is also used for conveying coal particles in coal into the third discharge port 11 through the second discharge port 33. It will be appreciated that after the coal particles are ground into fine particles by the grinding mechanism 2, the coal particles are automatically transported out of the grinding drum 1 through the third discharge port 11 due to gravity. After the screening mechanism 3 screens the coal, the coal particles are conveyed into the third discharge hole 11 through the second discharge hole 33, that is, the coal particles are conveyed out through the same discharge hole, so that the coal particles are conveniently collected or conveyed into the boiler by the conveying mechanism for combustion.
The screening mechanism 3 comprises a screen 34, the screen 34 is arranged at the bottom of the feed inlet 31, and an included angle formed by a straight line perpendicular to the screen 34 and the central axis of the grinding drum 1 is an acute angle. The screen 34 may be a filter plate with a plurality of holes, and when coal enters the screening mechanism 3 through the feed inlet 31, the screen 34 automatically separates coal pieces and particles in the coal, that is, fine particles enter the second discharge outlet 33 through the screen 34, and the coal pieces enter the mill 1 because the coal pieces cannot pass through the screened holes. The straight line perpendicular to the screen 34 forms an acute angle with the central axis of the mill tube 1, i.e. the screen 34 is inclined to the mill tube 1 so that the coal pieces can enter the mill tube 1 by gravity.
The milling drum 1 further comprises a disturbing mechanism 12, the disturbing mechanism 12 being arranged to disturb the coal cake in the milling drum 1. When the grinding mechanism 2 grinds the coal in the grinding drum 1, the grinding mechanism 2 is usually tightly propped against the coal, and then the grinding head 21 grinds the coal, after a period of grinding, the coal is accumulated due to the gravity or the propping force of the grinding mechanism 2, so that the grinding mechanism 2 is inconvenient to grind, and the coal is disturbed by the disturbance mechanism 12, namely, the coal is driven to move, so that the coal is not tightly accumulated. Specifically, the disturbing mechanism 12 includes a driving member 121, a transmission member 122 and a disturbing member 123, the driving member 121 is disposed outside the grinding drum 1, the disturbing member 123 is disposed inside the grinding drum 1, and the driving member 121 drives the disturbing member 123 to move through the transmission member 122. In a specific implementation, the grinding drum 1 may be provided with a through hole through which the driving member 122 passes, and a linear bearing may be disposed in the through hole, so that the driving member 122 slides in the through hole. The driving member 121 may be a motor, a cylinder, and the driving member 122 may be a screw when the driving member 121 is a motor. Preferably, the driving member 121 is a cylinder that can withstand large forces to facilitate disturbance of the accumulated coal.
The disturbance element 123 is rotatably connected with the inner side wall of the grinding drum 1, and in a specific implementation, the connection end of the driving element 122 and the disturbance element 123 is far away from the connection end of the disturbance element 123 and the inner side wall of the grinding drum 1, so that the driving element 122 can drive the disturbance element 123 to rotate.
The disturbance member 123 is provided with a connection member 1231, the connection member 1231 is provided with a through hole, the through hole may be a kidney-shaped hole, the transmission member 122 is provided with a rotation shaft 1221, and the transmission member 122 is connected to the through hole through the rotation shaft 1221.
The milling barrel 1 is also provided with a blocking piece 13, and the connecting end of the disturbing piece 123 and the milling barrel is arranged in an included angle formed by the blocking piece 13 and the inner side wall of the milling barrel 1. Because there are coal pieces and tiny coal particles in the milling barrel 1, a blocking piece 13 is arranged, and the connecting end of the disturbing piece 123 and the milling barrel is arranged in an included angle formed by the blocking piece 13 and the inner side wall of the milling barrel 1, so that the coal particles are prevented from entering the rotating end of the disturbing piece 123 and the milling barrel 1, and the rotation of the disturbing piece 123 is influenced.
The coal mill further comprises a base 4 and a water spraying mechanism 5, the water spraying mechanism 5 comprises a water tank 51, a water pump 52 and a water inlet pipe 53, the water tank 51 is arranged on the base 4, one end of the water pump 52 is connected with the water tank 51, the other end of the water pump 52 is connected with the water inlet pipe 53, the water inlet pipe 53 is arranged in the milling drum 1, and the water pump 52 is used for spraying water in the water tank 51 onto coal blocks in the milling drum 1 through the water inlet pipe 53. Since the coal mill grinds coal into fine particles, when the particles are transported out through the third discharge port 11, the particles are easily affected by wind, so that the coal particles fly in the air with the wind, and therefore, the sprinkling mechanism 5 is arranged, and the coal particles are adsorbed by water, so that the coal is prevented from flying in the air. In addition, the coal particles can also play a role in supporting combustion after absorbing water. Specifically, the sprinkling mechanism 5 includes a plurality of sprinklers symmetrically disposed on the inner sidewall of the pulverizing cylinder 1. In another embodiment, the grinding bit 21 is provided with a plurality of water spraying holes 212, and the water inlet pipe 53 is connected to the water spraying holes 212. I.e., the water inlet pipe 53 sprays water through the water spray holes 212 onto the coal.
In summary, the screening mechanism 3 is arranged on the coal mill to screen out the fine particles in the coal before entering the coal mill, so that the burden of the grinding mechanism 2 is reduced, in addition, the second discharge port 33 of the screening mechanism 3 is connected with the third discharge port 11 of the toner cartridge, and the fine particles of the coal are all transported out through one discharge port, so that the collection is convenient. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411474449.1A CN119098263A (en) | 2024-10-22 | 2024-10-22 | A coal mill for thermal power generation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411474449.1A CN119098263A (en) | 2024-10-22 | 2024-10-22 | A coal mill for thermal power generation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN119098263A true CN119098263A (en) | 2024-12-10 |
Family
ID=93720047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202411474449.1A Pending CN119098263A (en) | 2024-10-22 | 2024-10-22 | A coal mill for thermal power generation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN119098263A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209631355U (en) * | 2019-02-27 | 2019-11-15 | 江苏华电戚墅堰发电有限公司 | One kind being conducive to anticlogging clean type power plant coal pulverizer |
| CN114162843A (en) * | 2021-12-27 | 2022-03-11 | 鄂尔多斯市环保投资有限公司 | Device for preparing building material additive by using high-alumina fly ash |
| CN216499936U (en) * | 2021-11-03 | 2022-05-13 | 甘肃农业大学 | Portable desert cistanche granule grinding device |
| CN217725653U (en) * | 2022-04-28 | 2022-11-04 | 四川美丽居建材有限公司 | Building material grinder for building engineering |
| CN218359458U (en) * | 2022-08-15 | 2023-01-24 | 巴索夫(武汉)石油化工有限公司 | Raw material grinding device for chemical cleaning agent |
| CN220004368U (en) * | 2023-06-20 | 2023-11-14 | 福州福康医药科技有限公司 | Charging equipment for pharmaceutical intermediate production |
| CN221619628U (en) * | 2024-01-02 | 2024-08-30 | 烟台丰源矿产品有限公司 | Vertical pulverizer for processing nonmetallic mineral powder |
| CN221693743U (en) * | 2024-01-12 | 2024-09-13 | 北京天乐居家科技有限公司 | A grinder with multiple screening structures |
-
2024
- 2024-10-22 CN CN202411474449.1A patent/CN119098263A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209631355U (en) * | 2019-02-27 | 2019-11-15 | 江苏华电戚墅堰发电有限公司 | One kind being conducive to anticlogging clean type power plant coal pulverizer |
| CN216499936U (en) * | 2021-11-03 | 2022-05-13 | 甘肃农业大学 | Portable desert cistanche granule grinding device |
| CN114162843A (en) * | 2021-12-27 | 2022-03-11 | 鄂尔多斯市环保投资有限公司 | Device for preparing building material additive by using high-alumina fly ash |
| CN217725653U (en) * | 2022-04-28 | 2022-11-04 | 四川美丽居建材有限公司 | Building material grinder for building engineering |
| CN218359458U (en) * | 2022-08-15 | 2023-01-24 | 巴索夫(武汉)石油化工有限公司 | Raw material grinding device for chemical cleaning agent |
| CN220004368U (en) * | 2023-06-20 | 2023-11-14 | 福州福康医药科技有限公司 | Charging equipment for pharmaceutical intermediate production |
| CN221619628U (en) * | 2024-01-02 | 2024-08-30 | 烟台丰源矿产品有限公司 | Vertical pulverizer for processing nonmetallic mineral powder |
| CN221693743U (en) * | 2024-01-12 | 2024-09-13 | 北京天乐居家科技有限公司 | A grinder with multiple screening structures |
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