CN214174055U - Grindable index tester for lignite - Google Patents
Grindable index tester for lignite Download PDFInfo
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- CN214174055U CN214174055U CN202022919293.7U CN202022919293U CN214174055U CN 214174055 U CN214174055 U CN 214174055U CN 202022919293 U CN202022919293 U CN 202022919293U CN 214174055 U CN214174055 U CN 214174055U
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- grindable
- index
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- roller
- roller body
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- 239000003077 lignite Substances 0.000 title claims abstract description 14
- 238000001035 drying Methods 0.000 claims abstract description 16
- 238000007664 blowing Methods 0.000 claims abstract description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 238000005485 electric heating Methods 0.000 claims description 7
- 238000009423 ventilation Methods 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 6
- 239000003245 coal Substances 0.000 abstract description 17
- 238000010438 heat treatment Methods 0.000 abstract description 6
- 230000007547 defect Effects 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 2
- 239000000843 powder Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 238000007873 sieving Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 239000004484 Briquette Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- Drying Of Solid Materials (AREA)
Abstract
The utility model relates to the technical field of grindable index measurement of coal, and the existing grindable index measuring instrument has the defect of unstable measuring result when measuring high-water content and high-volatile content lignite; the drying device also comprises an air source generating device for blowing drying hot air into the roller body, and the bottom walls of the roller cover and the roller body are provided with vent holes or vent nets for the drying hot air to pass through; the coal in the drum body is heated and dried by the gas source generating device, so that the coal in the drum body can be sufficiently heated and dried, and the grindability index of different coals at a specific temperature under the VTI heating state can be measured.
Description
Technical Field
The utility model relates to a grindable index survey technical field of coal, concretely relates to grindable index apparatus for brown coal.
Background
The grindability index is larger, the larger the index is, the more easily the coal briquette is crushed into powder, the less the unit energy consumption is, and the smaller the index is, the opposite is realized, so that the grindability index is used for judging the crushing difficulty degree of the coal, the coal grinding power consumption is saved, and the boiler is operated safely and economically. The grindability index of the existing lignite can be measured by a KM-88 type grindability index measuring instrument, the grindability index of the lignite can be measured by crushing a coal sample by kinetic energy generated when a steel ball rotates in a roller and rises to a certain height and falls down, and then grinding, although the roller is positioned in a drying box in the measuring process, the grindability of the lignite with high moisture and high volatile content, namely the VTI of the lignite in a temperature range of 150 plus 200 ℃, can be obviously changed, and the measuring result is stable.
Therefore, there is an urgent need for a grindability index meter for lignite so as to be able to obtain stable measurement results.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that there is the unstable defect of testing result in the time of overcoming above-mentioned current grindable index apparatus survey high water high volatile lignite, provide a grindable index apparatus for brown coal.
In order to achieve the above object, the utility model discloses a following technical scheme can realize: a grindability index tester for lignite comprises a horizontal roller body, a roller cover arranged on the roller body, a steel ball arranged in the roller body and a driving device used for driving the roller body to rotate; the drying device comprises a drum body, a drum cover and a drum body, and is characterized by also comprising an air source generating device for blowing drying hot air into the drum body, wherein the bottom walls of the drum cover and the drum body are respectively provided with a vent hole or a vent net for the drying hot air to pass through.
The utility model discloses further preferred scheme does: the air source generating device is arranged on one axial side of the roller body and comprises an air blower and an electric heating device.
The utility model discloses further preferred scheme does: the air source generating device sends the drying hot air flow generated during working into the roller body through a pipeline.
The utility model discloses further preferred scheme does: the drum cover is funnel-shaped and comprises a large opening end and a small opening end, the large opening end of the drum cover is connected with the drum body, and the small opening end of the drum cover is sleeved on a pipeline communicated with the gas source generating device.
The utility model discloses further preferred scheme does: the drum body comprises a side wall and a bottom wall, and the ventilation hole or the ventilation net is located in the middle of the bottom wall, and a margin is arranged between the ventilation hole or the ventilation net and the outer edge of the bottom wall.
The utility model discloses further preferred scheme does: the driving device comprises a pair of rollers which are arranged in parallel and a motor which is in transmission connection with the rollers; the rollers are horizontally arranged, and the roller body is horizontally laid on the pair of rollers.
The utility model discloses further preferred scheme does: the lateral walls of the roller and the roller body are respectively provided with an outer gear ring, and the roller body are in meshing transmission through the outer gear rings.
The utility model discloses further preferred scheme does: the roller body rotates on the workbench through a bearing; the driving device comprises a motor, an outer gear ring is arranged outside the side wall of the roller body, and the motor is in transmission connection with the outer gear ring through a gear.
The utility model discloses further preferred scheme does: the pipeline that communicates between the gas source generating device and the roller body is a round pipe, the round pipe is fixed on the workbench through a bracket, and the roller cover is connected with the round pipe through a bearing.
The utility model discloses further preferred scheme does: and a temperature sensor for detecting the temperature of the drying hot air flow is also arranged.
To sum up, the utility model discloses following beneficial effect has: because the instrument is provided with the blower and the electric heating device, the instrument can generate dry hot air flow in the working process. During grinding, the coal sample is broken up by the kinetic energy of the steel ball when the steel ball rotates in the roller and rises to a certain height and falls down, then heated air (hot air) passes through the roller, so that the coal powder can be fully dried in the roller, and then the coal powder is ground at a specific temperature through the cooperation of a temperature sensor, so that the grindability indexes of different coals at the specific temperature under the VTI heating state can be measured.
Drawings
FIG. 1 is a schematic view of the structure of the grindability index measuring instrument described in example 1.
FIG. 2 is a side view of the grindability index meter described in example 1 (motor omitted).
FIG. 3 is a schematic view of the grindability index meter described in example 2.
Wherein:
100. a roller body; 200. a drum cover; 300. a steel ball; 400. a blower; 410. a circular tube; 500. an electric heating device; 600. a motor; 610. a roller; 620. an outer ring gear; 630. a bearing; 700. a work bench.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications without inventive contribution to the present embodiment as required after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Example 1;
as shown in fig. 1-2, the present embodiment provides an abradable index apparatus for brown coal, which includes a table 700, a horizontal drum body 100, a drum cover 200 disposed on the drum body 100, steel balls 300 disposed in the drum body 100, a driving device for driving the drum body 100 to rotate, and a gas source generating device for blowing a dry hot gas flow into the drum body 100.
In this embodiment, the driving device includes a pair of rollers 610 disposed in parallel, and a motor 600 drivingly connected to the rollers 610. The motor 600 is placed on the worktable 700, the roller 610 is horizontally disposed, one end of the roller is in transmission connection with the shaft of the motor 600, and the other end of the roller is connected with the bracket on the worktable 700 through a bearing 630. The roller body 100 lies on the pair of rollers 610, and when the motor 600 rotates, the roller 610 is driven to further drive the roller body 100 to rotate, in order to prevent sliding friction between the roller body 100 and the rollers 610 in this embodiment, outer gear rings 620 are respectively disposed outside the rollers 610 and the side walls of the roller body 100, and the rollers 610 and the roller body 100 are engaged and driven by the outer gear rings 620.
In order to allow the drying hot air flow to pass through the drum body 100, the drum cover 200 is provided with a vent hole, in this embodiment, the drum cover 200 is funnel-shaped and includes a large opening end and a small opening end, the large opening end of the drum cover 200 is connected to the drum body 100, and the small opening end of the drum cover 200 forms the vent hole and is sleeved on a pipeline communicated with the air source generating device.
The drum body 100 includes a side wall and a bottom wall, and the bottom wall of the drum body 100 is also provided with a vent hole (or a vent net) for passing the drying hot air flow. The vent hole (or the ventilation net) is positioned in the middle of the bottom wall, and an edge distance is reserved between the vent hole (or the ventilation net) and the outer edge of the bottom wall, so that the pulverized coal in the roller body 100 is prevented from being blown out of the roller body 100 by hot air.
The air source generating device is disposed at one axial side of the drum body 100, and includes a blower 400 and an electric heating device 500, and the electric heating device 500 is an electric heating wire. The air flow generated by the blower 400 is heated into dry hot air flow through the heating wires, and is sent into the drum body 100 through a pipeline. In order to control the power of the heating wire and the wind speed of the blower 400, a temperature sensor for detecting the temperature of the drying hot air flow is further provided on the pipeline (or inside the drum body 100).
The usage of the grindability index meter in this example is as follows: firstly, 4kg plus or minus 0.035kg of steel ball is loaded into the roller body 100, then 50g plus or minus 0.01g of sample is loaded, and the roller cover 200 is covered.
And then the blower 400 and the heating wire are turned on to increase the temperature to a preset range, the motor 600 is started, and the motor 600 drives the drum body 100 to reach a preset rotating speed and to stop after meeting a preset time condition.
And finally, placing the coal sample on an experimental sieve with the sieve pores sequentially stacked from top to bottom, and placing the uppermost experimental sieve, the coal sample and the experimental sieve together into a sieving machine for vibration sieving.
After vibrating for 15min, taking out the coal sample in each experimental sieve, weighing and recording, and weighing to 0.001 g. And calculating the total mass of the coal sample after vibrating and screening, wherein the loss does not exceed 2 percent of the total mass, otherwise, the loss is wasted. The logarithmic linear correlation between the mass percent on the sieve and the experimental sieve pore is checked, and the correlation coefficient is not less than 0.99. And (4) carrying out test screening checking calculation, and then obtaining the VTI heating grindability index of the test coal sample.
Example 2:
as shown in fig. 3, the present example provides another embodiment of the grindability index measuring device, and the grindability index measuring device in the present example is mainly different from the grindability index measuring device in example 1 in that: the driving device in this embodiment includes a motor 600, an outer gear ring 620 is disposed outside a sidewall of the drum body 100, and the motor 600 is in gear transmission connection with the outer gear ring 620. The pipeline between the gas source generating device and the roller body 100 is a circular pipe 410, the circular pipe 410 is fixed on the worktable 700 through a bracket, and the roller cover 200 is connected with the circular pipe 410 through a bearing 630. Therefore, in this embodiment, the roller body 100 is supported by the circular tube 410, and the roller body 100 in embodiment 1 is supported by the roller 610. The rest of the structure and the features are the same as those of embodiment 1, and are not described in detail here.
Claims (10)
1. A grindability index tester for lignite comprises a horizontal roller body, a roller cover arranged on the roller body, a steel ball arranged in the roller body and a driving device used for driving the roller body to rotate; the drying device is characterized by also comprising an air source generating device for blowing drying hot air into the roller body, wherein the bottom walls of the roller cover and the roller body are respectively provided with a vent hole or a vent net for the drying hot air to pass through.
2. The grindable index measuring instrument according to claim 1, wherein the gas source generating means is provided on one side of the drum body in the axial direction, and the gas source generating means includes a blower and an electric heating device.
3. The grindability index measuring instrument according to claim 2, wherein the air source generating means feeds a hot dry air flow generated in operation into the drum body through a pipe.
4. The grindable index measuring instrument according to claim 3, wherein the drum cover is funnel-shaped and includes a large opening end and a small opening end, the large opening end of the drum cover is connected to the drum body, and the small opening end of the drum cover is fitted over a pipe communicating with the gas source generating device.
5. The grindable index gauge according to claim 1, characterized in that the drum body includes a side wall and a bottom wall, and the vent hole or the ventilation net is located in the middle of the bottom wall with an edge distance from the outer edge of the bottom wall.
6. The grindable index measuring instrument according to any one of claims 1 to 5, characterized in that the drive means comprises a pair of rollers arranged in parallel, and a motor drivingly connected to the rollers; the rollers are horizontally arranged, and the roller body is horizontally laid on the pair of rollers.
7. The grindable index meter according to claim 6, characterized in that the rollers and the drum body are provided with external gear rings outside the side walls, and the rollers and the drum body are driven by the external gear rings in an engagement manner.
8. The grindable index gauge according to any one of claims 3 to 4, characterized by further comprising a table on which the drum body is rotated by a bearing; the driving device comprises a motor, an outer gear ring is arranged outside the side wall of the roller body, and the motor is in transmission connection with the outer gear ring through a gear.
9. The grindable index measuring instrument according to claim 8, wherein the pipe communicating between the gas source generating device and the drum body is a circular pipe fixed to the table through a holder, and the drum cover is connected to the circular pipe through a bearing.
10. The grindability index gauge according to claim 1, characterized in that a temperature sensor for detecting the temperature of the hot drying air stream is further provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022919293.7U CN214174055U (en) | 2020-12-03 | 2020-12-03 | Grindable index tester for lignite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022919293.7U CN214174055U (en) | 2020-12-03 | 2020-12-03 | Grindable index tester for lignite |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214174055U true CN214174055U (en) | 2021-09-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022919293.7U Active CN214174055U (en) | 2020-12-03 | 2020-12-03 | Grindable index tester for lignite |
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| CN (1) | CN214174055U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114813435A (en) * | 2022-03-23 | 2022-07-29 | 浙江工业大学 | Method for determining Hardgrove grindability index of lignite |
-
2020
- 2020-12-03 CN CN202022919293.7U patent/CN214174055U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114813435A (en) * | 2022-03-23 | 2022-07-29 | 浙江工业大学 | Method for determining Hardgrove grindability index of lignite |
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