CN111891780A - Totally-enclosed coal conveying system for thermal power plant - Google Patents
Totally-enclosed coal conveying system for thermal power plant Download PDFInfo
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- CN111891780A CN111891780A CN202010861635.6A CN202010861635A CN111891780A CN 111891780 A CN111891780 A CN 111891780A CN 202010861635 A CN202010861635 A CN 202010861635A CN 111891780 A CN111891780 A CN 111891780A
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- coal
- guide chute
- totally
- thermal power
- blanking pipe
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G69/00—Auxiliary measures taken, or devices used, in connection with loading or unloading
- B65G69/18—Preventing escape of dust
- B65G69/185—Preventing escape of dust by means of non-sealed systems
- B65G69/188—Preventing escape of dust by means of non-sealed systems with spraying means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G65/00—Loading or unloading
- B65G65/30—Methods or devices for filling or emptying bunkers, hoppers, tanks, or like containers, of interest apart from their use in particular chemical or physical processes or their application in particular machines, e.g. not covered by a single other subclass
- B65G65/32—Filling devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G69/00—Auxiliary measures taken, or devices used, in connection with loading or unloading
- B65G69/18—Preventing escape of dust
- B65G69/185—Preventing escape of dust by means of non-sealed systems
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
- Chutes (AREA)
Abstract
The invention discloses a totally-enclosed coal conveying system for a thermal power plant, which is characterized by comprising a guide chute, a return pipe and a blanking pipe, wherein the blanking pipe is arranged at the upper part of one end of the guide chute and is communicated with the interior of the guide chute, a buffer area, an inspection area and a purification area are arranged in the guide chute, a dust blocking device is arranged at the intersection of the buffer area, the inspection area and the purification area, the return pipe is arranged right above the buffer area, a current collector is arranged at the bottom of the return pipe and is arranged at the top of the buffer area, a detection device and a control box are arranged in the inspection area, and a spraying system is arranged in the purification area. In the in-service use, this system can reduce the incident risk that the operating personnel caused when clearing up the mediation to the coal breakage section of thick bamboo, improves coal conveying operational environment, reduces the risk that the occupational disease takes place.
Description
Technical Field
The invention relates to a material conveying system, in particular to a totally-enclosed coal conveying system for a thermal power plant.
Background
At present, a coal feeding system of a power plant has large daily coal conveying capacity and long daily working time, and along with the change of the coal market in recent years, the quality of coal entering the plant is increasingly poor, and a series of problems of large water content, large coal slime content, burning of over-fire coal and the like exist. The problems of coal blockage, dust raising and the like of the coal conveying equipment are obvious, and the comprehensive transformation of multiple coal types is needed. The specific problems are as follows: (1) the received coal quality of the coal entering the factory is high in water content and coal slime content, the coal is easy to hang and arch in the coal dropping cylinder, and the coal dropping cylinder is blocked in serious conditions, so that the normal operation of the unit is influenced. More dangerous, in order to ensure that the normal operation of the coal feeding maintaining unit is ensured, operating personnel need to enter the coal dropping cylinder for cleaning, the workload of workers is increased, and the danger of accidents of personnel falling from high places and coal burying exists; (2) in the operation process of the coarse crusher and the fine crusher, the centrifugal wind pressure of the rotor is greater than the dust collecting wind pressure of the dust remover, so that the powder spraying of the tail guide chute is serious. The raised dust affects the field operation environment and has the risk of explosion and fire; (3) the discharger of the dust remover is directly connected with the ash hopper, fine coal powder often enters a bearing through a framework oil seal to cause the locking of the bearing, and equipment is frequently stopped to influence the normal operation of the dust remover; (4) the direct impact position of the fire coal is seriously abraded, and the abrasion and coal leakage frequently occur. There is therefore a need for a coal handling system that can be retrofitted to address the above problems.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a totally-enclosed coal conveying system for a thermal power plant, which is applied by a coal dust self-circulation system through a blanking pipe, a guide chute and a totally-enclosed material pouring chute, can improve the coal blockage frequency of a blanking barrel in the actual use process, reduce the dredging frequency, reduce the safety accident risk caused by cleaning and dredging the blanking barrel by operating personnel, improve the coal conveying operation environment and reduce the occupational disease risk.
The invention is realized by the following technical scheme:
the utility model provides a thermal power plant is with totally closed coal conveying system, its characterized in that, includes baffle box, back flow, blanking pipe, the blanking pipe sets up the upper portion in baffle box one end, blanking pipe and the inside intercommunication of baffle box, inside buffer, inspection district, the clean area of being provided with of baffle box, the intersection of buffer, inspection district, clean area is provided with the dust blocking device, be provided with the back flow directly over the buffer, the bottom of back flow is provided with the collector, the collector is installed at the buffer top, be provided with detection device and control box in the inspection district, be provided with spray system in the clean area.
Furthermore, the totally-enclosed coal conveying system for the thermal power plant is characterized in that the blanking pipe comprises a blanking port, a ship-type three-way turning plate and a discharge port, the shape of the blanking pipe is designed to design angles and shapes according to the sliding route of the coal flow by simulating the sliding process of the coal flow, the coal flow is buffered with the pipe wall, large-angle collision is avoided, the patching technology is adopted for parts with serious abrasion, a 20-thick NM650 steel plate is replaced, and the abrasion resistance is increased in a targeted manner.
Further, a totally closed coal conveying system is used in thermal power plant, the baffle box includes baffle box curb plate, top apron, belt, the top apron is supported by the support fossil fragments that set up in the baffle box inside, be provided with the anti-overflow skirtboard between belt upper portion and the baffle box curb plate, be provided with the antifriction plate between belt lower part and the baffle box curb plate, anti-overflow skirtboard and belt contact department are provided with wear strip, the bottom of belt is provided with the bearing roller, the bottom of baffle box is supported by the support that sets up, it is fixed to be connected by fastening bolt between top apron and support fossil fragments, the baffle box curb plate, the upper portion of anti-overflow skirtboard is fixed on the baffle box curb plate by fastening bolt.
Furthermore, the totally closed coal conveying system for the thermal power plant is characterized in that two buffer areas are arranged, the two buffer areas are arranged in series, two sets of backflow pipes and blanking pipes are arranged, and one backflow pipe and one blanking pipe are arranged at the top of each corresponding buffer area.
Further, the fully-closed coal conveying system for the thermal power plant adopts a pneumatic spraying mode, the fully-closed material pouring groove is provided with a coal dust self-circulation system, coal dust is collected to fire coal through pressure difference, a dust blocking device is added to prevent the coal dust from flowing to an outlet, and an anti-overflow apron plate is used inside to prevent the coal dust inside from overflowing; the pneumatic spraying form can be selected to restrain coal.
Furthermore, the totally-enclosed coal conveying system for the thermal power plant is characterized in that the outer wall of a non-impact surface of the blanking pipe is made of Q235 materials, the inner wall of the impact surface is made of an abrasion-resistant layer abrasion-resistant mirror alloy lining plate, the thickness of the inner wall of the impact surface is set to be 8-16mm, the abrasion resistance of a coal blanking cylinder is improved, and the coal plugging frequency of the coal blanking cylinder is reduced.
Furthermore, a totally closed coal conveying system is used in thermal power plant, the board is turned over to ship formula tee bend adopts U type structure, can effectively guarantee that the coal flows and falls down along blanking pipe placed in the middle, prevents long-pending coal, hangs the coal.
Further, a totally closed coal conveying system is used in thermal power plant, the discharge gate sets up to J type water conservancy diversion mouth dilatation device, has both guaranteed the water conservancy diversion buffering and has guaranteed the coal breakage between two parties.
Furthermore, the detection device and the spraying system are electrically connected with the control box, the control box can manually control the starting and stopping of the spraying system, the spraying system and the detection device are controlled in a linkage mode, and the spraying system can automatically start and stop according to data detected by the detection device.
In summary, the following beneficial effects of the invention are:
1. the invention relates to a totally-enclosed coal conveying system for a thermal power plant, which is characterized in that a mechanical simulation technology is applied, a coal flow flowing model in a blanking pipe is established, the design structure of the blanking pipe is improved, the blanking pipe simulates the sliding process of a coal flow, the shape of the blanking pipe is designed, the angle and the shape are designed according to the sliding route of the coal flow, the coal flow is buffered with the pipe wall, large-angle collision is avoided, the modified curve blanking barrel can improve the coal blockage frequency of the blanking barrel, and the dredging frequency is reduced.
2. The totally-enclosed coal conveying system for the thermal power plant reduces the risk of safety accidents caused by cleaning and dredging of the coal chute by operators, improves the coal conveying operation environment and reduces the risk of occupational diseases.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic view of the structure of the present invention.
FIG. 2 is a schematic view of the blanking pipe of the present invention.
Fig. 3 is a schematic cross-sectional structure of the material guide chute of the present invention.
Reference numbers and corresponding part names in the drawings:
1-guide chute, 2-purification area, 3-inspection area, 4-buffer area, 5-spraying system, 6-dust-blocking device, 7-detection device, 8-control box, 9-current collector, 10-return pipe, 11-blanking pipe, 12-blanking port, 13-ship type three-way turning plate, 14-discharge port, 101-guide chute side plate, 102-top cover plate, 103-supporting keel, 104-anti-overflow apron plate, 105-wear plate, 106-belt, 107-carrier roller, 108-bracket, 109-wear strip and fastening bolt.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Examples
As shown in fig. 1-3, a totally closed coal conveying system for thermal power plant, includes baffle box 1, back flow 10, blanking pipe 11 sets up the upper portion in baffle box 1 one end, blanking pipe 11 and the inside intercommunication of baffle box 1, baffle box 1 is inside to be provided with buffer 4, inspection district 3, clean area 2, the junction of buffer 4, inspection district 3, clean area 2 is provided with dust retainer 6, be provided with back flow 10 directly over buffer 4, the bottom of back flow 10 is provided with current collector 9, current collector 9 is installed at buffer 4 top, be provided with detection device 7 and control box 8 in the inspection district 3, be provided with spray system 5 in the clean area.
Specifically, the blanking pipe 11 comprises a blanking port 12, a ship type three-way turning plate 13 and a discharge port 14, the shape of the blanking pipe 11 is designed to design the angle and the shape according to the sliding route of the coal flow by simulating the sliding process of the coal flow, so that the coal flow is buffered with the pipe wall of the blanking pipe, and no large-angle collision exists.
Specifically, the baffle box 1 includes a baffle box side plate 101, a top cover plate 102 and a belt 106, the top cover plate 102 is supported by a support keel 103 arranged inside the baffle box 1, an anti-overflow apron plate 104 is arranged between the upper part of the belt 106 and the baffle box 1 side plate, an anti-wear plate 105 is arranged between the lower part of the belt 106 and the baffle box side plate 101, a wear-resistant strip 109 is arranged at the contact part of the anti-overflow apron plate 104 and the belt 106, a carrier roller 107 is arranged at the bottom of the belt 106, the bottom of the baffle box 1 is supported by a support 108 arranged, the top cover plate 102 is fixedly connected with the support keel 103 and the baffle box side plate 101 by fastening bolts, and the upper part of the anti-overflow apron plate 104 is fixed on the baffle box side.
Specifically, two buffer areas 4 are arranged, the two buffer areas 4 are arranged in series, two sets of return pipes 10 and two sets of blanking pipes 11 are arranged, and one return pipe 10 and one blanking pipe 11 are arranged at the top of each buffer area 4.
Preferably, the spraying system 5 is in the form of pneumatic spraying.
Specifically, the outer wall of the non-impact surface of the blanking pipe 11 is made of Q235 materials, the inner wall of the impact surface of the blanking pipe 11 is made of an abrasion-resistant layer abrasion-resistant mirror alloy lining plate, and the thickness of the abrasion-resistant layer abrasion-resistant mirror alloy lining plate is set to be 8-16 mm.
Specifically, the ship type three-way turning plate 13 adopts a U-shaped structure, so that the coal flow can be effectively ensured to fall in the center along the blanking pipe 11, and coal accumulation and coal hanging are prevented.
Specifically, the discharge port 14 is provided with a J-shaped flow guide nozzle expansion device, so that flow guide buffering and coal falling centering are ensured.
Specifically, the detection device 7 and the spraying system 5 are electrically connected with the control box 8, the control box 8 can manually control the starting and stopping of the spraying system 5, the spraying system 5 and the detection device 7 are controlled in a linkage mode, and the spraying system 5 can automatically start and stop according to data detected by the detection device 7.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. A totally-enclosed coal conveying system for a thermal power plant is characterized by comprising a material guide chute (1), a return pipe (10) and a blanking pipe (11), the blanking pipe (11) is arranged at the upper part of one end of the guide chute (1), the blanking pipe (11) is communicated with the interior of the guide chute (1), a buffer zone (4), an inspection zone (3) and a purification zone (2) are arranged in the material guide groove (1), a dust blocking device (6) is arranged at the intersection of the buffer zone (4), the inspection zone (3) and the purification zone (2), a return pipe (10) is arranged right above the buffer area (4), the bottom of the return pipe (10) is provided with a current collector (9), the collector (9) is arranged at the top of the buffer zone (4), the detection device (7) and the control box (8) are arranged in the inspection zone (3), and the spraying system (5) is arranged in the purification zone.
2. The totally-enclosed coal conveying system for the thermal power plant according to claim 1, wherein the blanking pipe (11) comprises a blanking port (12), a ship-type three-way turning plate (13) and a discharge port (14), the blanking pipe (11) is designed to have an angle and a shape according to a sliding route of the coal flow by simulating a sliding process of the coal flow, so that the coal flow is buffered with the pipe wall of the blanking pipe without large-angle collision.
3. The totally-enclosed coal conveying system for thermal power plants according to claim 1, wherein the guide chute (1) comprises a guide chute side plate (101), a top cover plate (102) and a belt (106), the top cover plate (102) is supported by a support keel (103) arranged inside the guide chute (1), an anti-overflow apron plate (104) is arranged between the upper part of the belt (106) and the guide chute side plate (1), an anti-wear plate (105) is arranged between the lower part of the belt (106) and the guide chute side plate (101), a wear-resistant strip (109) is arranged at the contact part of the anti-overflow apron plate (104) and the belt (106), a carrier roller (107) is arranged at the bottom of the belt (106), the bottom of the guide chute (1) is supported by a support (108), and the top cover plate (102), the support keel (103) and the guide chute side plate (101) are fixedly connected by fastening bolts, the upper part of the anti-overflow apron plate (104) is fixed on the guide chute side plate (101) through fastening bolts.
4. The totally-enclosed coal conveying system for the thermal power plant according to claim 1, wherein two buffer areas (4) are arranged, the two buffer areas (4) are arranged in series, two sets of the return pipe (10) and the blanking pipe (11) are arranged, and one return pipe (10) and one blanking pipe (11) are arranged corresponding to the top of each buffer area (4).
5. The totally-enclosed coal conveying system for thermal power plants according to claim 1, characterized in that the spraying system (5) is in the form of pneumatic spraying.
6. The totally-enclosed coal conveying system for the thermal power plant according to claim 2, wherein the outer wall of the non-impact surface of the blanking pipe (11) is made of Q235 material, the inner wall of the impact surface of the blanking pipe (11) is made of an abrasion-resistant layer abrasion-resistant mirror alloy lining plate, and the thickness of the lining plate is 8-16 mm.
7. The totally-enclosed coal conveying system for the thermal power plant according to claim 2, wherein the ship-type three-way turning plate (13) adopts a U-shaped structure, so that coal flow can be effectively ensured to fall down along the blanking pipe (11) in the middle, and coal accumulation and coal hanging are prevented.
8. The totally-enclosed coal conveying system for the thermal power plant according to claim 2, wherein the discharge port (14) is provided with a J-shaped flow guide nozzle capacity expansion device, so that flow guide buffering and coal breakage centering are ensured.
9. The totally-enclosed coal conveying system for the thermal power plant according to claim 1, wherein the detection device (7) and the spraying system (5) are electrically connected with the control box (8), the control box (8) can manually control the start and stop of the spraying system (5), the spraying system (5) and the detection device (7) are controlled in a linkage manner, and the spraying system (5) can automatically start and stop according to data detected by the detection device (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010861635.6A CN111891780B (en) | 2020-08-25 | 2020-08-25 | Totally-enclosed coal conveying system for thermal power plant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010861635.6A CN111891780B (en) | 2020-08-25 | 2020-08-25 | Totally-enclosed coal conveying system for thermal power plant |
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| Publication Number | Publication Date |
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| CN111891780A true CN111891780A (en) | 2020-11-06 |
| CN111891780B CN111891780B (en) | 2022-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010861635.6A Active CN111891780B (en) | 2020-08-25 | 2020-08-25 | Totally-enclosed coal conveying system for thermal power plant |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112456173A (en) * | 2020-12-02 | 2021-03-09 | 中煤科工集团北京华宇工程有限公司 | Continuous type accurate material distribution system |
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| JPS54140353A (en) * | 1978-04-21 | 1979-10-31 | Hitachi Metals Ltd | Dust-proof chute for loader |
| JPH10329921A (en) * | 1997-06-02 | 1998-12-15 | Bando Chem Ind Ltd | Dust raising preventing device for conveyor conveying device |
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| CN201321279Y (en) * | 2008-12-15 | 2009-10-07 | 高远新 | Dust-removing type guide chute |
| CN205739056U (en) * | 2016-06-27 | 2016-11-30 | 象山向荣机械制造有限公司 | A kind of streamlined coal spout |
| CN107472803A (en) * | 2017-08-17 | 2017-12-15 | 安徽攀登重工股份有限公司 | Unpowered totally-enclosed slide type deduster gathering sill device |
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2020
- 2020-08-25 CN CN202010861635.6A patent/CN111891780B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54140353A (en) * | 1978-04-21 | 1979-10-31 | Hitachi Metals Ltd | Dust-proof chute for loader |
| JPH10329921A (en) * | 1997-06-02 | 1998-12-15 | Bando Chem Ind Ltd | Dust raising preventing device for conveyor conveying device |
| CN2601989Y (en) * | 2003-02-21 | 2004-02-04 | 鞍钢集团实业发展总公司综合利用公司 | Totally enclosed transfer device of belt conveyor head |
| CN201321279Y (en) * | 2008-12-15 | 2009-10-07 | 高远新 | Dust-removing type guide chute |
| CN205739056U (en) * | 2016-06-27 | 2016-11-30 | 象山向荣机械制造有限公司 | A kind of streamlined coal spout |
| CN107472803A (en) * | 2017-08-17 | 2017-12-15 | 安徽攀登重工股份有限公司 | Unpowered totally-enclosed slide type deduster gathering sill device |
Non-Patent Citations (1)
| Title |
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| 邓金福: "《燃料设备运行》", 31 January 2005 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112456173A (en) * | 2020-12-02 | 2021-03-09 | 中煤科工集团北京华宇工程有限公司 | Continuous type accurate material distribution system |
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| CN111891780B (en) | 2022-02-01 |
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