CN114515690A - A dust fall device that sieves for coal pulverizer - Google Patents
A dust fall device that sieves for coal pulverizer Download PDFInfo
- Publication number
- CN114515690A CN114515690A CN202111640635.4A CN202111640635A CN114515690A CN 114515690 A CN114515690 A CN 114515690A CN 202111640635 A CN202111640635 A CN 202111640635A CN 114515690 A CN114515690 A CN 114515690A
- Authority
- CN
- China
- Prior art keywords
- dust
- coal
- sieve plate
- filtering sieve
- screening
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- 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.)
- Pending
Links
- 239000003245 coal Substances 0.000 title claims abstract description 82
- 239000000428 dust Substances 0.000 title claims description 46
- 238000001914 filtration Methods 0.000 claims abstract description 64
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000012216 screening Methods 0.000 claims description 61
- 239000000463 material Substances 0.000 claims description 16
- 238000004064 recycling Methods 0.000 claims description 6
- 239000007921 spray Substances 0.000 claims description 5
- 238000010030 laminating Methods 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 239000002817 coal dust Substances 0.000 abstract description 21
- 238000007873 sieving Methods 0.000 abstract description 21
- 238000011084 recovery Methods 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 7
- 239000002245 particle Substances 0.000 description 7
- 230000007246 mechanism Effects 0.000 description 5
- 239000000843 powder Substances 0.000 description 4
- 238000005507 spraying Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003818 cinder Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/42—Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
- B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
- B07B1/4663—Multi-layer screening surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B2201/00—Details applicable to machines for screening using sieves or gratings
- B07B2201/04—Multiple deck screening devices comprising one or more superimposed screens
Abstract
The invention discloses a dust-settling sieving device for a coal mill, which is characterized in that a first filtering sieve plate, a second filtering sieve plate and a third filtering sieve plate which are parallel to each other up and down and are mutually spaced are arranged in a machine body, and a first sieving cavity, a second sieving cavity, a third sieving cavity and a coal dust recovery chamber are respectively and correspondingly formed, wherein a dust-settling box body which is vertical and is communicated with the interior of the coal dust recovery chamber is arranged at the central position of the bottom of the machine body, and the dust-settling box body is connected with an external water tank through a pump pipeline. According to the scheme, coal blocks with different sizes can be effectively separated and pulverized coal is filtered, so that the crushing efficiency of the coal blocks is improved, and the coal mill is convenient to process and operate; moreover, the invention has the function of preventing the screen mesh from being blocked, and can reduce the coal dust from flying and effectively recover the coal dust in the sieving operation process of the coal blocks.
Description
Technical Field
The invention relates to a facility for carrying out dust fall and pulverized coal sieving on a coal mill, in particular to a dust fall sieving device for the coal mill, and belongs to the technical field of coal mills.
Background
Coal mills are machines for crushing and grinding coal briquettes into coal dust, which are important auxiliary equipment of coal dust furnaces, and are classified into low-speed coal mills, medium-speed coal mills and high-speed coal mills according to the rotating speed. The coal mill plays an important role in actual production, and the main working flow of the coal mill is that coal briquettes are ground into coal powder, and the coal powder is discharged along a feed opening of the coal mill and then falls to a conveyor belt to be conveyed out. The coal mill is the most important large-scale equipment in the coal-to-liquid and powder preparation system, and the operation safety and the economical efficiency of the coal mill are extremely important for the normal operation of the powder preparation system.
However, the screening device for the existing coal mill has a single screening level for the coal blocks, and the coal mill still needs to mill the coal blocks with various sizes simultaneously, so that the coal milling efficiency is low; moreover, when coal is screened, a large amount of coal dust is discharged together, and the coal dust is easy to float into the surrounding air, which affects the surrounding environment and the health of people, and also causes a certain waste of coal resources. Therefore, there is a need for an improved screening device structure to improve the operational performance of the screening device.
Disclosure of Invention
The invention aims to solve the problems and provides a dust-settling and screening device for a coal mill, so that coal briquettes can be screened in multiple layers conveniently, screened coal dust can be subjected to dust-settling and recycling, and the performance of the device is improved.
The technical solution of the invention is as follows: the utility model provides a dust fall device that sieves for coal pulverizer, includes the organism, feed hopper has been seted up to the upper end central authorities of organism, its characteristics are: first filtration sieve, second filtration sieve and third filtration sieve have been seted up from the top to the inside of organism, first filtration sieve, second filtration sieve and third filtration sieve are two liang parallel from top to bottom and relative interval sets up, correspond respectively and form first screening cavity, second screening cavity, third screening cavity and buggy recovery room, first passage is installed to the lateral wall intercommunication of first screening cavity, the second passage is installed to the lateral wall intercommunication of second screening cavity, the third passage is installed to the lateral wall intercommunication of third screening cavity, the bottom central point department of putting of organism be provided with be vertical form, and with the buggy retrieves the indoor dust fall box that communicates of room inside, the dust fall box is connected with outside water tank through the pump line.
Further, above-mentioned dust fall sieving mechanism for coal pulverizer, wherein: the utility model discloses a dust fall device, including dust fall box, water tank, pump pipeline, spray header, dust fall box, intercommunication has the dust return pipe on the lateral wall of dust fall box, and the internally mounted of dust fall box has the shower head, the inside wall that the shower head laminating in and be linked together through pump line and water tank, the shower head surface is equipped with a plurality of nozzle, the crisscross setting in position of a plurality of nozzle.
Still further, above-mentioned a dust fall sieving mechanism for coal pulverizer, wherein: the first material guide pipe is connected with the first screening cavity in a welding mode, and the second material guide pipe and the third material guide pipe are fixedly installed with the second screening cavity and the third screening cavity respectively in a flange connection mode.
Still further, above-mentioned a dust fall sieving mechanism for coal pulverizer, wherein: the first screening cavity occupies a larger volume of the machine body than the second screening cavity and the third screening cavity occupy the total volume of the machine body.
Still further, above-mentioned a dust fall sieving mechanism for coal pulverizer, wherein: the sieve meshes of the first filtering sieve plate, the second filtering sieve plate and the third filtering sieve plate are all in a grid net shape, and the sizes of the sieve meshes corresponding to the first filtering sieve plate, the second filtering sieve plate and the third filtering sieve plate are reduced in sequence.
Still further, above-mentioned a dust fall sieving mechanism for coal pulverizer, wherein: vibrating motors are installed at the side ends of the first filtering sieve plate, the second filtering sieve plate and the third filtering sieve plate.
Thus, by adopting the technical scheme of the invention, firstly, after the size distribution condition of the coal blocks to be ground is measured by a tool, the first filtering sieve plate, the second filtering sieve plate and the third filtering sieve plate are sequentially arranged in the machine body according to the measured data, thereby forming a first screening cavity, a second screening cavity, a third screening cavity and a coal dust recovery chamber which are most beneficial to multi-level screening of coal blocks, namely, the coal blocks are guided into the machine body through the feeding funnel and are sequentially screened by the first filtering sieve plate, the second filtering sieve plate and the third filtering sieve plate, coal blocks with different diameters are respectively stored in a first screening cavity, a second screening cavity and a third screening cavity which correspond to each other, after the pulverized coal particles with the minimum particle size fall into the pulverized coal recovery chamber, the pulverized coal particles are collected by the dust settling box body in a centralized mode, and after the pulverized coal particles are sprayed and settled by the spray head, dust can be reduced and the pulverized coal particles can be recovered.
Compared with the prior art, the coal pulverizer provided by the invention has the advantages that through the multi-layer filtering structure, coal blocks with different sizes can be effectively separated, and coal dust is filtered out, so that the crushing efficiency of the coal blocks is improved, and the coal pulverizer is convenient to process and operate; moreover, the invention has the function of preventing the screen mesh from being blocked, and can reduce the coal dust from flying and effectively recover the coal dust in the sieving operation process of the coal blocks.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
fig. 2 is a schematic view of the internal structure of the present invention.
The meaning of the reference symbols in the figures is: 1-machine body, 2-feeding funnel, 3-first filtering sieve plate, 4-second filtering sieve plate, 5-third filtering sieve plate, 6-first screening cavity, 7-second screening cavity, 8-third screening cavity, 9-pulverized coal recovery chamber, 10-first material guide pipe, 11-second material guide pipe, 12-third material guide pipe, 13-dust-fall box body, 14-dust return pipe, 15-water tank, 16-pump pipeline and 17-spray head.
Detailed Description
The technical solutions of the present invention are further explained below with reference to the accompanying drawings so as to be more easily understood and appreciated. The parts of the feeding funnel 2, the dust return pipe 14, the water tank 15, the pump pipeline 16 and the like are commonly known by those skilled in the art, and no special requirement is required in the present application.
As shown in fig. 1 and 2, the present invention provides a dust settling and screening device for a coal mill, which includes a machine body 1, wherein a feed hopper 2 is provided at the center of the upper end of the machine body 1, and coal briquettes are introduced into the machine body 1 through the feed hopper 2.
According to the technical scheme of the invention, a first filtering sieve plate 3, a second filtering sieve plate 4 and a third filtering sieve plate 5 are arranged in the machine body 1 from top to bottom, the first filtering sieve plate 3, the second filtering sieve plate 4 and the third filtering sieve plate 5 are parallel up and down in pairs, and are arranged at intervals according to a certain proportion to respectively and correspondingly form a first screening cavity 6, a second screening cavity 7, a third screening cavity 8 and a coal dust recovery chamber 9, a first material guide pipe 10 is arranged on the side wall of the first screening cavity 6 in a communicating manner, a second material guide pipe 11 is arranged on the side wall of the second screening cavity 7 in a communicating manner, third passage 12 is installed in the lateral wall intercommunication of third screening cavity 8, the bottom central point department of putting of organism 1 be provided with be vertical form setting and with the inside dust fall box 13 that is linked together of buggy recovery room 9, dust fall box 13 is connected with outside water tank 15 through pump line 16.
Preferably, among the above structures: the intercommunication has dust return pipe 14 on dust fall box 13's the lateral wall, and dust fall box 13's internally mounted has shower head 17, the inside wall that shower head 17 laminated in is linked together through pump line 16 and water tank 15, shower head 17 surface is equipped with a plurality of nozzle, the crisscross setting in position of a plurality of nozzle, the nozzle structure through the crisscross setting in shower head 17 surface can be on a wider range spray the inside buggy of collecting of dust fall box 13 to reduce the coal dust and be favorable to the buggy to concentrate the recovery.
Preferably, among the above structures: the sieve pores of the first filtering sieve plate 3, the second filtering sieve plate 4 and the third filtering sieve plate 5 are all in a grid net shape, and the sizes of the sieve pores corresponding to the first filtering sieve plate, the second filtering sieve plate and the third filtering sieve plate are sequentially reduced; vibrating motors are installed at the side ends of the first filtering sieve plate 3, the second filtering sieve plate 4 and the third filtering sieve plate 5, and the first filtering sieve plate 3, the second filtering sieve plate 4 and the third filtering sieve plate 5 are driven by the vibrating motors to vibrate and screen the coal blocks.
Specifically, among the foretell dust fall device that sieves that is used for coal pulverizer's structure, first screening cavity 6 occupies the volume that organism 1 and is greater than second screening cavity 7 and the total volume that third screening cavity 8 occupied organism 1, because the screening reserve of coal cinder first time in the successive layer screening is the biggest, consequently remains first screening cavity 6 and is the biggest reservation volume, can effectively avoid the coal cinder to gather more down and pile the screening jam problem that causes more.
More specifically, the first material guiding pipe 10 is connected with the first screening cavity 6 in a welded manner, the second material guiding pipe 11 and the third material guiding pipe 12 are fixedly installed with the second screening cavity 7 and the third screening cavity 8 respectively in a flange connection manner, and according to different coal block size screening in actual operation, the distance between the second filtering screen plate 4 and the third filtering screen plate 5 can be adjusted to change the corresponding second screening cavity 7 and third screening cavity 8, and therefore, the second material guiding pipe 11 and the third material guiding pipe 12 adopt a flange connection manner capable of changing the installation position, and adjustment is facilitated.
In the technical scheme of the invention, the adjustable installation directions of the first filter sieve plate 3, the second filter sieve plate 4 and the third filter sieve plate 5 and the dust-settling box 13 for recovering pulverized coal are technical keys, the key points in the scheme are that relevant parts related to a multi-layer screening structure formed among the first filter sieve plate 3, the second filter sieve plate 4 and the third filter sieve plate 5 are shown in fig. 2, the basic principle form of spraying and dust settling through communicating a water tank by the structure of the dust-settling box 13 is also shown, for parts such as the feeding funnel 2, the dust return pipe 14, the water tank 15 and the pump pipeline 16, common technicians in the field can carry out conventional arrangement according to the prior art, and the scheme has no special requirements on the aspects of model selection, combined use and the like.
Thus, according to the technical scheme of the invention, firstly, after the size distribution of the coal blocks to be ground is measured by a tool, the first filtering sieve plate 3, the second filtering sieve plate 4 and the third filtering sieve plate 5 are sequentially arranged inside the machine body 1 according to the measured data, so as to divide and form the first sieving cavity 6, the second sieving cavity 7, the third sieving cavity 8 and the coal dust recycling chamber 9 which are most beneficial to multi-level sieving of the coal blocks, namely, the coal blocks can be guided into the machine body 1 through the feeding funnel 2, and after being sequentially sieved by the first filtering sieve plate 3, the second filtering sieve plate 4 and the third filtering sieve plate 5, the coal blocks with different diameters are respectively stored in the corresponding first sieving cavity 6, the second sieving cavity 7 and the third sieving cavity 8, wherein the coal dust particles with the smallest particle size fall into the coal dust recycling chamber 9, are intensively collected by the dust settling box 13, and are subjected to spraying treatment by the spraying head 17, dust can be reduced and recovered.
Through the above description, the multi-layer filtering structure can effectively separate coal briquettes with different sizes and filter out coal dust, so that the crushing efficiency of the coal briquettes is improved, and the coal mill is convenient to process and operate; moreover, the invention has the function of preventing the screen mesh from being blocked, and can reduce the coal dust from flying and effectively recover the coal dust in the sieving operation process of the coal blocks.
The technical solutions, working processes and implementation effects of the present invention are described in detail above, and it should be noted that the description is only a typical example of the present invention, and besides, the present invention may have other various specific embodiments, and all technical solutions formed by using equivalent substitutions or equivalent changes fall within the scope of the present invention as claimed.
Claims (8)
1. The utility model provides a dust fall device that sieves for coal pulverizer, includes organism (1), feed hopper (2), its characterized in that have been seted up to the upper end central authorities of organism (1): the dust-settling dust-coal-settling dust-coal-settling dust-coal recycling dust-settling dust-coal recycling dust-settling dust-coal recycling dust-settling dust-, the dust fall box body (13) is connected with an external water tank (15) through a pump pipeline (16).
2. The dust fall screening device for the coal pulverizer of claim 1, wherein: the sieve meshes of the first filtering sieve plate (3), the second filtering sieve plate (4) and the third filtering sieve plate (5) are all in a grid net shape, and the sizes of the sieve meshes corresponding to the first filtering sieve plate, the second filtering sieve plate and the third filtering sieve plate are reduced in sequence.
3. The dust settling screening device for the coal mill as claimed in claim 1 or 2, wherein: vibrating motors are installed at the side ends of the first filtering sieve plate (3), the second filtering sieve plate (4) and the third filtering sieve plate (5).
4. The dust fall screening device for the coal pulverizer of claim 1, wherein: the first screening cavity (6) occupies a larger volume of the machine body (1) than the second screening cavity (7) and the third screening cavity (8) occupy the total volume of the machine body (1).
5. The dust fall screening device for the coal pulverizer of claim 1, wherein: the first material guide pipe (10) is connected with the first screening cavity (6) in a welding mode.
6. The dust fall screening device for the coal pulverizer of claim 1, wherein: and the second material guide pipe (11) and the third material guide pipe (12) are fixedly installed with the second screening cavity (7) and the third screening cavity (8) respectively in a flange connection mode.
7. The dust fall screening device for the coal pulverizer of claim 1, wherein: the lateral wall of dust fall box (13) is gone up the intercommunication and is had dust return pipe (14), and the internally mounted of dust fall box (13) has shower head (17), the inside wall that shower head (17) laminating in is linked together through pump line (16) and water tank (15).
8. The dust fall screening device for the coal pulverizer of claim 1, wherein: the surface of the spray header (17) is provided with a plurality of nozzles, and the positions of the nozzles are staggered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111640635.4A CN114515690A (en) | 2021-12-30 | 2021-12-30 | A dust fall device that sieves for coal pulverizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111640635.4A CN114515690A (en) | 2021-12-30 | 2021-12-30 | A dust fall device that sieves for coal pulverizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114515690A true CN114515690A (en) | 2022-05-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111640635.4A Pending CN114515690A (en) | 2021-12-30 | 2021-12-30 | A dust fall device that sieves for coal pulverizer |
Country Status (1)
| Country | Link |
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| CN (1) | CN114515690A (en) |
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|---|---|---|---|---|
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| CN213001219U (en) * | 2020-06-22 | 2021-04-20 | 湖北玉皇剑茶业有限公司 | Black tea processing is with high-efficient sorting unit that bloies |
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| CN205165155U (en) * | 2015-11-11 | 2016-04-20 | 云南正和生物科技有限公司 | Tealeaves rotary strainer device |
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