Lignite drying, conveying and dust collecting device

Abstract

The utility model discloses a lignite drying, conveying and dust collecting device, which belongs to the technical field of material conveying and comprises a conveying belt arranged at the downstream of a lignite drying unit and used for receiving and conveying lignite dried by the lignite drying unit; the coal bunker is arranged at the downstream of the conveying belt and used for collecting lignite; the dust blocking cover is arranged on the upper side of the conveying belt and used for conducting totally-closed protection on the conveying belt, flow guide fins are arranged on the dust blocking cover, and water collecting grooves are detachably connected to the two sides of the bottom of the dust blocking cover; and the dust collection and dehydration mechanism is used for collecting dust and dehydrating dust gas containing water vapor in the dust blocking cover. Through the flow guide fins on the dust shield, steam enters the water collecting tank along the flow guide fins after water drops are separated out from the dust shield in the rising process, and finally flows out from the water outlet, so that secondary falling of the water drops suspended at the top into materials is effectively reduced.

Description

Technical Field

[0001] This utility model belongs to the field of material conveying technology, and specifically relates to a lignite drying, conveying and dust collection device. Background Technology

[0002] Existing dust collection systems mostly consist of common belt conveyors with dust hoods, using induced draft fans to draw in dust, which is then collected by bag filters and reintroduced onto the belt for transport. However, in actual use, problems frequently arise, such as high resistance in the bag filters. After drying, the lignite reaches temperatures above 60°C, and moisture continuously evaporates during transport. Ultrafine coal dust is suspended in the air along with this moisture, resulting in a supersaturated airflow containing water droplets. This often leads to clogging of the dust collector and abnormal dust discharge, causing the dust collection system to malfunction. Furthermore, water droplets suspended from the top of the dust hood fall back into the material, carrying back the moisture evaporated from the residual heat of the lignite. Utility Model Content

[0003] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0004] A lignite drying, conveying, and dust collection device includes:

[0005] A conveyor belt is located downstream of the lignite drying unit and is used to receive and transport the lignite dried by the lignite drying unit.

[0006] A coal bunker, located downstream of the conveyor belt, is used to collect lignite;

[0007] A dust cover is installed on the upper side of the conveyor belt to provide full enclosed protection for the conveyor belt. The dust cover has guide fins and water collection troughs are detachably connected to both sides of the bottom of the dust cover.

[0008] A dust extraction and dehydration mechanism is used to extract and dehydrate the dust gas containing water vapor inside the dust cover.

[0009] Furthermore, the dust extraction and dehydration mechanism includes:

[0010] Multiple suction pipes are spaced apart on the upper side of the dust cover, and the first end of each suction pipe is connected to the dust cover.

[0011] An air extraction pipe is provided on the upper side of the dust cover and is connected to the second end of the dust suction pipe. Multiple water suction plates are detachably connected to the upper part of the air extraction pipe. The multiple water suction plates are spaced apart along the length of the air extraction pipe and extend into the pipe of the air extraction pipe.

[0012] A dust collector is located at the lowest point of the conveyor belt, and the inlet of the dust collector is connected to the exhaust pipe for dust collection.

[0013] A granulator is provided below the dust collector, with its inlet connected to the outlet of the dust collector and its outlet located inside the dust cover.

[0014] Furthermore, the dust cover and the water collection trough are connected by bolts.

[0015] Furthermore, the suction pipe includes:

[0016] The vacuum cleaner hose body, the first end of which is connected to the dust cover;

[0017] A venturi tube is fixed inside the first end of the suction tube body. The tapered section of the venturi tube is connected to the dust cover. The diameter of the suction tube body is larger than the straight diameter of the venturi tube.

[0018] Multi-stage stainless steel filter screens; the multi-stage stainless steel filter screens are spaced apart along the height direction of the suction pipe body and are all located on the upper side of the venturi tube. The multi-stage stainless steel filter screens and the suction pipe body are detachably connected.

[0019] Furthermore, the stainless steel filter screen has no fewer than 3 levels, and the distance between two adjacent stainless steel filter screens is no less than twice the diameter of the suction pipe body. The mesh size of the stainless steel filter screen is no less than 5mm.

[0020] Furthermore, a heater is provided between the dust collector and the exhaust pipe, and the dust collector is connected to the fan through the exhaust pipe.

[0021] Furthermore, the lower part of the air extraction pipe is provided with multiple baffles, which are correspondingly arranged with multiple water absorption plates, and the baffles are located downstream of the corresponding water absorption plates.

[0022] Furthermore, it also includes a cleaning pipe, which is located below the air extraction pipe and is connected to the air extraction pipe through multiple guide pipes, which are located between the baffle and the water absorption plate corresponding to the baffle.

[0023] Furthermore, the dust cover is inverted U-shaped or inverted V-shaped.

[0024] Furthermore, a gate valve is provided at the lower end of the dust collector.

[0025] The beneficial effects of this utility model are:

[0026] This invention utilizes the guide fins on the dust cover to ensure that steam encounters water droplets on the dust cover during its ascent, and then flows along the guide fins into the water collection tank before finally flowing out from the drain outlet, effectively reducing the secondary fall of water droplets hanging at the top into the material.

[0027] This invention reduces the moisture content entering the dust collector by installing a stainless steel filter screen inside the dust suction pipe. At the same time, the stainless steel filter screen, guide fins, and water collection tank work together to ensure that the moisture evaporated by the waste heat is discharged in an orderly manner, avoiding clogging of the dust collector's dust discharge and dust collection filter pipe, further reducing the moisture content of the raw coal and improving economic efficiency. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure of a lignite drying, conveying, and dust collection device according to the present invention.

[0029] Figure 2 This is a partially enlarged schematic diagram of the present invention;

[0030] Figure 3 for Figure 2 Schematic diagram of AA cross section in the middle;

[0031] Figure 4 This is a schematic diagram of the exhaust pipe and cleaning pipe of this utility model.

[0032] In the diagram: 1. Lignite drying unit; 2. Conveyor belt; 3. Support wheel; 4. Dust cover; 5. Exhaust pipe; 6. Dust suction pipe body; 7. Water suction plate; 8. Baffle; 9. Guide pipe; 10. Cleaning pipe; 11. Water collection trough; 12. Venturi tube; 13. Stainless steel filter screen; 14. Guide fins; 15. Coal bunker; 16. Dust collector; 17. Slide valve; 18. Granulator; 19. Fan; 20. Exhaust pipe; 21. Heater; 22. Drain outlet. Detailed Implementation

[0033] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0034] Example 1

[0035] refer to Figures 1 to 4 A lignite drying, conveying, and dust collection device, comprising:

[0036] Conveyor belt 2 is located downstream of lignite drying unit 1 and is used to receive and transport lignite dried by lignite drying unit 1.

[0037] In practice, multiple support wheels 3 are installed at the lower end of the conveyor belt 2.

[0038] Coal bunker 15 is located downstream of conveyor belt 2 and is used to collect lignite;

[0039] Dust cover 4 is set on the upper side of conveyor belt 2 for fully enclosed protection of conveyor belt 2. Dust cover 4 has guide fins 14 and water collection troughs 11 are detachably connected to the bottom two sides of dust cover 4.

[0040] In this embodiment, the dust cover 4 has guide fins 14 to break the attraction between water droplets and the cover.

[0041] The dust extraction and dehydration mechanism is used to extract and dehydrate the dust gas containing water vapor inside the dust cover 4.

[0042] This invention utilizes the guide fins on the dust cover to ensure that steam encounters water droplets on the dust cover during its ascent, and then flows along the guide fins into the water collection tank before finally flowing out from the drain outlet, effectively reducing the secondary fall of water droplets hanging at the top into the material.

[0043] In this embodiment, the dust extraction and dehydration mechanism includes:

[0044] Multiple suction pipes are spaced apart on the upper side of the dust cover 4, and the first end of each suction pipe is connected to the dust cover 4.

[0045] The suction pipe 5 is located on the upper side of the dust cover 4 and is connected to the second end of the suction pipe. Multiple water-absorbing plates 7 are detachably connected to the upper part of the suction pipe 5. The multiple water-absorbing plates 7 are spaced apart along the length of the suction pipe 5 and extend into the pipe of the suction pipe 5.

[0046] Dust collector 16 is located at the lowest point of conveyor belt 2, and the inlet of dust collector 16 is connected to the exhaust pipe 5 for dust collection.

[0047] Granulator 18 is located below dust collector 16, and the inlet of granulator 18 is connected to the outlet of dust collector 16. The outlet of granulator 18 is located inside dust cover 4.

[0048] In this embodiment, the granulator 18 ensures that the collected dust does not generate secondary dust.

[0049] In practice, the exhaust pipe 5 before entering the dust collector 16 is set with a low point and a drain outlet 22.

[0050] In this embodiment, the dust cover 4 and the water collection tank 11 are connected by bolts, which makes it convenient to disassemble and wash the water collection tank 11 after coal slime has settled.

[0051] Example 2

[0052] To improve practicality, this embodiment has been further modified based on embodiment 1.

[0053] In this embodiment, the suction pipe includes:

[0054] The first end of the suction pipe body 6 is connected to the dust cover 4;

[0055] Venturi tube 12 is fixed inside the first end of the vacuum tube body 6. The tapered section of the Venturi tube 12 is connected to the dust cover 4. The diameter of the vacuum tube body 6 is larger than the straight diameter of the Venturi tube 12.

[0056] Multi-stage stainless steel filter screen 13; The multi-stage stainless steel filter screen 13 is arranged at intervals along the height direction of the suction pipe body 6 and is located on the upper side of the venturi tube 12. The multi-stage stainless steel filter screen 13 and the suction pipe body 6 can be detachably connected.

[0057] This invention reduces the moisture content entering the dust collector by installing a stainless steel filter screen inside the dust suction pipe. At the same time, the stainless steel filter screen, guide fins, and water collection tank work together to ensure that the moisture evaporated by the waste heat is discharged in an orderly manner, avoiding clogging of the dust collector's dust discharge and dust collection filter pipe, further reducing the moisture content of the raw coal and improving economic efficiency.

[0058] In this embodiment, the number of stages of the multi-stage stainless steel filter 13 is not less than 3, and the distance between two adjacent stages of stainless steel filter 13 is not less than twice the diameter of the suction pipe body 6. The mesh size of the stainless steel filter 13 is not less than 5mm to prevent the formation of a water film.

[0059] In this embodiment, a heater 21 is provided between the dust collector 16 and the exhaust pipe 5, and the dust collector 16 is connected to the fan 19 through the exhaust pipe 20.

[0060] In this embodiment, the moisture in the airflow containing dust and water vapor is fully captured during the cooling process, and the airflow is further heated by 3-5°C before entering the dust collector 16 to ensure that the airflow temperature is above the dew point temperature and to ensure the operating temperature of the dust collector.

[0061] In this embodiment, a plurality of baffles 8 are provided in the lower part of the air extraction pipe 5. The plurality of baffles 8 are correspondingly provided with a plurality of water absorption plates 7, and the baffles 8 are located downstream of the corresponding water absorption plates 7.

[0062] In this embodiment, a cleaning pipe 10 is also included. The cleaning pipe 10 is disposed below the air extraction pipe 5, and the cleaning pipe 10 and the air extraction pipe 5 are connected by multiple guide pipes 9. The guide pipes 9 are located between the baffle 8 and the water absorption plate 7 correspondingly disposed on the baffle 8.

[0063] In this embodiment, the water-absorbing plate 7 works similarly to a mop. The water absorbed can be squeezed out by pulling it out, and the water is blocked by the lower baffle 8 and flows into the cleaning pipe 10 through the guide pipe 9. The cleaning pipe 10 is used to collect the wastewater condensed from the suction pipe 5. The water-absorbing plate 7 can be periodically removed for cleaning, and the cleaning pipe 10 is periodically rinsed with water. In this embodiment, the dust cover 4 is an inverted U-shape or an inverted V-shape.

[0064] In this embodiment, a gate valve 17 is provided at the lower end of the dust collector 16.

[0065] Working principle: During its ascent, steam encounters the dust baffle 4, causing water droplets to precipitate. The water then flows along the guide fins 14 into the water collection tank 11 and finally exits from the drain outlet 22. High-dust gas containing a large amount of water vapor is drawn in by the suction pipe. When the high-humidity gas passes through the venturi tube 12 throat, moisture is released. This moisture is captured by the multi-stage stainless steel filter 13 and flows downwards along the outer cylinder of the suction pipe to the guide fins 14, ultimately entering the water collection tank 11. The dust-laden gas stream exiting the suction pipe, as its temperature decreases during flow, is further dehydrated by the water suction plate 7 inside the extraction pipe 5. Finally, at the inlet of the dust collector 16, it is heated by the heater 21 to 3-5°C, becoming dry gas that enters the dust collector. After dust collection, it falls into the granulator 18 below, and after granulation, it falls onto the conveyor belt for further transport. The heater's heat source comes from the condensate after steam drying of lignite; after heat exchange, the condensate returns to the original system.

[0066] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model are included within the protection scope of this utility model.

Claims

1. A lignite drying, conveying, and dust collection device, characterized in that, include: A conveyor belt is located downstream of the lignite drying unit and is used to receive and transport the lignite dried by the lignite drying unit. A coal bunker, located downstream of the conveyor belt, is used to collect lignite; A dust cover is installed on the upper side of the conveyor belt to provide full enclosed protection for the conveyor belt. The dust cover has guide fins and water collection troughs are detachably connected to both sides of the bottom of the dust cover. A dust extraction and dehydration mechanism is used to extract and dehydrate the dust gas containing water vapor inside the dust cover.

2. The lignite drying, conveying, and dust collection device according to claim 1, characterized in that, The dust extraction and dehydration mechanism includes: Multiple suction pipes are spaced apart on the upper side of the dust cover, and the first end of each suction pipe is connected to the dust cover. An air extraction pipe is provided on the upper side of the dust cover and is connected to the second end of the dust suction pipe. Multiple water suction plates are detachably connected to the upper part of the air extraction pipe. The multiple water suction plates are spaced apart along the length of the air extraction pipe and extend into the pipe of the air extraction pipe. A dust collector is located at the lowest point of the conveyor belt, and the inlet of the dust collector is connected to the exhaust pipe for dust collection. A granulator is provided below the dust collector, with its inlet connected to the outlet of the dust collector and its outlet located inside the dust cover.

3. The lignite drying, conveying, and dust collection device according to claim 1, characterized in that, The dust cover and the water collection trough are connected by bolts.

4. The lignite drying, conveying, and dust collection device according to claim 2, characterized in that, The vacuum tube includes: The vacuum cleaner hose body, the first end of which is connected to the dust cover; A venturi tube is fixed inside the first end of the suction tube body. The tapered section of the venturi tube is connected to the dust cover. The diameter of the suction tube body is larger than the straight diameter of the venturi tube. Multi-stage stainless steel filter screens; the multi-stage stainless steel filter screens are spaced apart along the height direction of the suction pipe body and are all located on the upper side of the venturi tube. The multi-stage stainless steel filter screens and the suction pipe body are detachably connected.

5. A lignite drying, conveying, and dust collection device according to claim 4, characterized in that, The stainless steel filter screen has no fewer than 3 levels, and the distance between two adjacent stainless steel filter screens is no less than twice the diameter of the suction pipe body. The mesh size of the stainless steel filter screen is no less than 5mm.

6. A lignite drying, conveying, and dust collection device according to claim 2, characterized in that, A heater is provided between the dust collector and the exhaust pipe, and the dust collector is connected to the fan through the exhaust pipe.

7. A lignite drying, conveying, and dust collection device according to claim 2, characterized in that, The lower part of the air extraction pipe is provided with multiple baffles, which are correspondingly arranged with multiple water absorption plates, and the baffles are located downstream of the corresponding water absorption plates.

8. A lignite drying, conveying, and dust collection device according to claim 7, characterized in that, It also includes a cleaning pipe, which is located below the air extraction pipe and is connected to the air extraction pipe through multiple guide pipes. The guide pipes are located between the baffle and the water absorption plate corresponding to the baffle.

9. A lignite drying, conveying, and dust collection device according to claim 2, characterized in that, The dust cover is inverted U-shaped or inverted V-shaped.

10. A lignite drying, conveying, and dust collection device according to claim 2, characterized in that, A gate valve is installed at the lower end of the dust collector.

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