CN214916977U - Lump coal system powder drying system - Google Patents
Lump coal system powder drying system Download PDFInfo
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- CN214916977U CN214916977U CN202121630253.9U CN202121630253U CN214916977U CN 214916977 U CN214916977 U CN 214916977U CN 202121630253 U CN202121630253 U CN 202121630253U CN 214916977 U CN214916977 U CN 214916977U
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- coal
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- 239000003245 coal Substances 0.000 title claims abstract description 127
- 238000001035 drying Methods 0.000 title claims abstract description 25
- 239000000843 powder Substances 0.000 title description 18
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000010298 pulverizing process Methods 0.000 claims abstract description 13
- 238000005303 weighing Methods 0.000 claims abstract description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 14
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 8
- 239000001301 oxygen Substances 0.000 claims description 8
- 229910052760 oxygen Inorganic materials 0.000 claims description 8
- 239000000428 dust Substances 0.000 claims description 6
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 4
- 239000000779 smoke Substances 0.000 claims description 3
- 239000003546 flue gas Substances 0.000 abstract description 11
- 238000000227 grinding Methods 0.000 abstract description 5
- 238000001514 detection method Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000007664 blowing Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000002309 gasification Methods 0.000 description 4
- 238000003786 synthesis reaction Methods 0.000 description 4
- 239000004744 fabric Substances 0.000 description 3
- 239000002817 coal dust Substances 0.000 description 2
- 239000002737 fuel gas Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000004484 Briquette Substances 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- 239000003077 lignite Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Landscapes
- Drying Of Solid Materials (AREA)
- Disintegrating Or Milling (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The utility model discloses a lump coal pulverizing and drying system, which comprises a raw coal bunker, a weighing coal feeder, a coal mill, a bag filter, a hot blast stove and a screw conveyer; the bottom outlet of the raw coal bin is communicated with a coal inlet of a coal mill through a weighing coal feeder, a rotary separator is arranged at a coal outlet of the coal mill, the coal outlet of the coal mill is communicated with an inlet of a bag filter, the top outlet of the bag filter is communicated with an inlet of a hot blast stove, and the bottom outlet of the bag filter is communicated with an inlet of a spiral conveyor; the flue gas outlet of the hot-blast furnace is communicated with the air inlet of the coal mill, and the system can reduce the safety risk of equipment and personnel while realizing coal grinding drying by arranging a plurality of detection points, and has the advantages of simple operation and good reliability.
Description
Technical Field
The utility model relates to a drying system, concretely relates to lump coal system powder drying system.
Background
The dry coal powder pressure gasification technology is currently an important process technology in the field of IGCC power generation and coal chemical industry, and is a new technology for converting coal into synthesis gas. In order to improve the carbon conversion rate and gasification efficiency of coal, lump coal needs to be ground into dry powder and then the dry powder is pneumatically conveyed into a gasification furnace.
However, different lump coals have different coal quality characteristics and have larger water content difference, particularly the lignite has larger water content. The common problems in the existing coal grinding technology, such as the blockage of a bag filter caused by the high water content of coal powder when the mixture of coal powder and air flow discharged from a coal grinding machine enters the bag filter for filtration. The improper control of the temperature of the circulating gas causes the burning out of the filter cloth of the bag filter. Or the flue gas CO exceeds the standard due to improper control of the air-fuel ratio, and the potential safety hazard of operation exists.
Therefore, there is a need to develop a coal briquette drying system to solve the above problems.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art's shortcoming, provide a lump coal system powder drying system, this system can realize reducing the water content of buggy to the grinding of lump coal. Meanwhile, the safety risk of equipment and personnel can be reduced, the operation is simple, and the reliability is good.
In order to achieve the purpose, the lump coal pulverizing and drying system of the utility model comprises a raw coal bunker, a weighing coal feeder, a coal mill, a bag filter, a hot blast stove and a screw conveyer;
the bottom outlet of the raw coal bin is communicated with a coal inlet of a coal mill through a weighing coal feeder, a rotary separator is arranged at a coal outlet of the coal mill, the coal outlet of the coal mill is communicated with an inlet of a bag filter, the top outlet of the bag filter is communicated with an inlet of a hot blast stove, and the bottom outlet of the bag filter is communicated with an inlet of a spiral conveyor;
the smoke outlet of the hot blast stove is communicated with the air inlet of the coal mill.
The top outlet of the bag filter is communicated with the inlet of the hot blast stove through a circulating fan.
The bottom outlet of the bag filter is provided with a rotary discharge valve.
And a hot blast furnace outlet pressure measuring point and a hot blast furnace outlet temperature measuring point are arranged at the outlet of the hot blast furnace.
And a coal mill outlet pressure measuring point, a coal mill outlet temperature measuring point and a coal mill outlet oxygen content measuring point are arranged at the outlet of the coal mill.
And a bag filter outlet dust content measuring point, a bag filter outlet carbon monoxide content measuring point and a bag filter outlet pressure measuring point are arranged at the outlet of the bag filter.
The system also comprises a low-pressure nitrogen pipeline, wherein the low-pressure nitrogen pipeline is communicated with a back-blowing inlet of the hot blast stove, a back-blowing inlet of the coal mill and a back-blowing inlet of the raw coal bunker.
The bag filter also comprises a back-blowing nitrogen pipeline for back-blowing the bag filter.
The device also comprises a vent pipeline, wherein the vent pipeline is communicated with an inlet of the circulating fan.
And the emptying pipeline is provided with an emptying valve.
The utility model discloses following beneficial effect has:
lump coal powder process drying system when concrete operation, cubic raw coal gets into in the raw coal storehouse, send into the coal pulverizer and wear into the buggy after weighing the feeder weighing and measuring, at this in-process, the hot flue gas of hot-blast furnace output carries the buggy on the mill to the bag filter from bottom to top from the coal pulverizer, the bag filter gets off the buggy, the flue gas that the bag filter top came out gets into circulating fan, then send into the hot-blast furnace again, the buggy is realized the drying simultaneously from the in-process that the coal pulverizer carried bag filter by hot flue gas, buggy moisture content after the drying is 2%, in order to realize the drying to the buggy, bag filter's life is improved.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Wherein, 1 is a raw coal bunker, 2 is a weighing coal feeder, 3 is a rotary separator, 4 is a coal mill, 5 is a hot blast stove, 6 is a bag filter, 7 is a rotary discharge valve, 8 is a screw conveyer, 9 is a circulating fan, 10 is a hot blast stove outlet pressure measuring point, 11 is a hot blast stove outlet temperature measuring point, 12 is a coal mill outlet pressure measuring point, 13 is a coal mill outlet temperature measuring point, 14 is a coal mill outlet oxygen content measuring point, 15 is a bag filter outlet dust content measuring point, 16 is a bag filter outlet carbon monoxide content measuring point, 17 is a bag filter outlet pressure measuring point, and 18 is a circulating fan outlet pressure measuring point.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings:
referring to fig. 1, the lump coal pulverizing and drying system of the present invention includes a raw coal bunker 1, a weighing coal feeder 2, a coal mill 4, a bag filter 6, a hot blast stove 5, and a screw conveyor 8; the outlet at the bottom of the raw coal bin 1 is communicated with the coal inlet of a coal mill 4 through a weighing coal feeder 2, a rotary separator 3 is arranged at the coal outlet of the coal mill 4, the coal outlet of the coal mill 4 is communicated with the inlet of a bag filter 6, the outlet at the top of the bag filter 6 is communicated with the inlet of a hot blast stove 5, and the outlet at the bottom of the bag filter 6 is communicated with the inlet of a screw conveyor 8; the smoke outlet of the hot blast stove 5 is communicated with the air inlet of the coal mill 4.
The top outlet of the bag filter 6 is communicated with the inlet of the hot blast stove 5 through a circulating fan 9; the bottom outlet of the bag filter 6 is provided with a rotary discharge valve 7.
When the coal drying device works, blocky raw coal (with water content of 5-20%) enters a raw coal bin 1, then is weighed and metered by a weighing coal feeder 2 and then is fed into a coal mill 4 to be ground into coal powder, in the process, hot flue gas output by a hot blast stove 5 carries the coal powder on a grinding disc from bottom to top of the coal mill 4 into a bag filter 6 from bottom to top, the coal powder is filtered by the bag filter 6 and then is fed into a downstream system through a rotary discharge valve 7 and a screw conveyor 8, flue gas discharged from the top of the bag filter 6 enters a circulating fan 9 and then is fed into the hot blast stove 5, the coal powder is dried simultaneously in the process of being conveyed from the coal mill 4 to the bag filter 6 by the hot flue gas (200-260 ℃), the water content of the dried coal powder is 2%, the heat of the hot blast stove flue gas comes from the hot blast stove 5, the air stove 5 is provided with an air inlet, a fuel gas inlet and a synthesis gas inlet, wherein fuel gas LPG is utilized in the initial operation, The diesel oil and the natural gas are combusted to provide hot flue gas, and after the subsequent coal gasification system generates synthesis gas, the synthesis gas is combusted to generate the hot flue gas.
A hot blast stove outlet pressure measuring point 10 and a hot blast stove outlet temperature measuring point 11 are arranged at the outlet of the hot blast stove 5; a coal mill outlet pressure measuring point 12, a coal mill outlet temperature measuring point 13 and a coal mill outlet oxygen content measuring point 14 are arranged at the outlet of the coal mill 4; a measuring point 15 for the dust content at the outlet of the bag filter, a measuring point 16 for the carbon monoxide content at the outlet of the bag filter and a measuring point 17 for the pressure at the outlet of the bag filter are arranged at the outlet of the bag filter 6.
The utility model discloses still include low pressure nitrogen gas pipeline, wherein, low pressure nitrogen gas pipeline is linked together with the blowback gas entry of hot-blast furnace 5, the blowback gas entry of coal pulverizer 4 and the blowback gas entry of raw coal bunker 1.
The utility model discloses still including being used for carrying out the blowback nitrogen gas pipeline of blowback to bag filter 6.
The utility model discloses still include the blow-down pipeline, wherein, the blow-down pipeline is linked together with circulating fan 9's entry, is provided with the atmospheric valve on the blow-down pipeline.
In order to ensure proper coal powder particle size, a rotary separator 3 is arranged at the upper part of the coal mill 4, and the coal powder particle size is controlled by adjusting the rotating speed of the rotary separator 3. A coal mill outlet temperature measuring point 13 and a coal mill outlet oxygen content measuring point 14 are arranged on a pipeline at the outlet of the coal mill 4 (the oxygen content is controlled below 8%, the oxygen content exceeds 8% and the system jumps and sweeps, so that the coal dust with too high oxygen content is prevented from burning, the temperature is controlled at 105 ℃, the temperature exceeds 110 ℃ and the hop is prevented from burning out a cloth bag filter element), a hot blast stove outlet pressure measuring point 10 and a hot blast stove outlet temperature measuring point 11 are arranged at the outlet of the hot blast stove 5, a bag filter outlet dust content measuring point 15, a bag filter outlet carbon monoxide content measuring point 16 and a bag filter outlet pressure measuring point 17 are arranged at the outlet of the bag filter 6, and when the CO content exceeds 1000ppm, the trip is carried out, so that the combustion of the hot blast stove 5 is insufficient, or the coal dust of the bag filter 6 is smoldered. And (4) jumping when the dust content exceeds 30ppm, which indicates that the cloth bag filter element leaks powder.
Claims (10)
1. A lump coal pulverizing and drying system is characterized by comprising a raw coal bunker (1), a weighing coal feeder (2), a coal mill (4), a bag filter (6), a hot blast stove (5) and a screw conveyor (8);
the bottom outlet of the raw coal bin (1) is communicated with a coal inlet of a coal mill (4) through a weighing coal feeder (2), a rotary separator (3) is arranged at a coal outlet of the coal mill (4), the coal outlet of the coal mill (4) is communicated with an inlet of a bag filter (6), the top outlet of the bag filter (6) is communicated with an inlet of a hot blast stove (5), and the bottom outlet of the bag filter (6) is communicated with an inlet of a spiral conveyer (8);
the smoke outlet of the hot blast stove (5) is communicated with the air inlet of the coal mill (4).
2. The lump coal pulverizing and drying system as claimed in claim 1, wherein the top outlet of the bag filter (6) is communicated with the inlet of the hot blast stove (5) via a circulating fan (9).
3. The lump coal pulverizing and drying system as claimed in claim 1, wherein a rotary discharge valve (7) is provided at the bottom outlet of the bag filter (6).
4. The lump coal pulverizing and drying system as claimed in claim 1, wherein an outlet of the hot blast stove (5) is provided with a hot blast stove outlet pressure measuring point (10) and a hot blast stove outlet temperature measuring point (11).
5. The lump coal pulverizing and drying system as claimed in claim 1, wherein the outlet of the coal mill (4) is provided with a coal mill outlet pressure measuring point (12), a coal mill outlet temperature measuring point (13) and a coal mill outlet oxygen content measuring point (14).
6. The lump coal pulverizing and drying system as claimed in claim 1, wherein a bag filter outlet dust content measuring point (15), a bag filter outlet carbon monoxide content measuring point (16) and a bag filter outlet pressure measuring point (17) are provided at the outlet of the bag filter (6).
7. The lump coal pulverizing and drying system of claim 1, further comprising a low-pressure nitrogen pipeline, wherein the low-pressure nitrogen pipeline is communicated with the blowback inlet of the hot blast stove (5), the blowback inlet of the coal pulverizer (4) and the blowback inlet of the raw coal bunker (1).
8. The lump coal pulverizing and drying system as claimed in claim 1, further comprising a blowback nitrogen gas pipe for blowback of the bag filter (6).
9. The lump coal pulverizing and drying system of claim 1, further comprising a blow-down pipe, wherein the blow-down pipe is communicated with an inlet of the circulating fan (9), and a blow-down valve is arranged on the blow-down pipe.
10. The lump coal pulverizing and drying system as claimed in claim 2, wherein a circulating fan outlet pressure measuring point (18) is provided at an outlet of the circulating fan (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121630253.9U CN214916977U (en) | 2021-07-16 | 2021-07-16 | Lump coal system powder drying system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121630253.9U CN214916977U (en) | 2021-07-16 | 2021-07-16 | Lump coal system powder drying system |
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| Publication Number | Publication Date |
|---|---|
| CN214916977U true CN214916977U (en) | 2021-11-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121630253.9U Active CN214916977U (en) | 2021-07-16 | 2021-07-16 | Lump coal system powder drying system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214916977U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114700163A (en) * | 2022-03-21 | 2022-07-05 | 山东钢铁集团永锋临港有限公司 | Mill powder process is with access & exit temperature automatic regulating system |
| CN115264518A (en) * | 2022-08-01 | 2022-11-01 | 陕西延长石油（集团）有限责任公司 | Particle size grading dry coal powder preparation device and method |
| CN115305125A (en) * | 2022-09-06 | 2022-11-08 | 重庆钢铁股份有限公司 | Full negative pressure coal powder preparation system and method capable of self-circulating flue gas |
-
2021
- 2021-07-16 CN CN202121630253.9U patent/CN214916977U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114700163A (en) * | 2022-03-21 | 2022-07-05 | 山东钢铁集团永锋临港有限公司 | Mill powder process is with access & exit temperature automatic regulating system |
| CN115264518A (en) * | 2022-08-01 | 2022-11-01 | 陕西延长石油（集团）有限责任公司 | Particle size grading dry coal powder preparation device and method |
| CN115305125A (en) * | 2022-09-06 | 2022-11-08 | 重庆钢铁股份有限公司 | Full negative pressure coal powder preparation system and method capable of self-circulating flue gas |
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