CN213736768U - Stifled pull throughs is prevented in former coal bunker of thermal power factory - Google Patents
Stifled pull throughs is prevented in former coal bunker of thermal power factory Download PDFInfo
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- CN213736768U CN213736768U CN202022781214.0U CN202022781214U CN213736768U CN 213736768 U CN213736768 U CN 213736768U CN 202022781214 U CN202022781214 U CN 202022781214U CN 213736768 U CN213736768 U CN 213736768U
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Abstract
The utility model discloses a stifled pull throughs is prevented to former coal bunker of thermal power factory, including jet-propelled layer and pneumatic hammering layer, the jet-propelled layer is equipped with a plurality of layers and jet-propelled layer and is arranged in spraying high-pressure draught to the inner chamber of former coal bunker, the pneumatic hammering layer is provided with a plurality of layers and pneumatic hammering layer and sets up on the lateral wall of former coal bunker, all be provided with jet-propelled layer and or pneumatic hammering layer between the pan feeding mouth and the discharge gate of former coal bunker. The utility model discloses can dredge the whole of former coal bunker, guarantee that the coal stream of every section of former coal bunker is unobstructed, ensure the defeated coal normal operating work of feeder, whole scheme constitutes simply, and is less to former anti-blocking dredging system change, and is rational in infrastructure, and the cost is saved to the reliable operation, maintains the convenience and the on-the-spot installation of being convenient for is reformed transform, and very big widening coal type adaptability improves coal utilization level.
Description
Technical Field
The utility model belongs to the technical field of coal fired power plant's coal bunker, specifically belong to a stifled pull throughs is prevented in former coal bunker of thermal power factory.
Background
The raw coal bunker of traditional coal fired power plant essential element is cylindrical storehouse body and lower part toper blanking fill, receives weather influences such as rainfall or when joining in marriage high moisture coal kind, and the stickness of coal is strong, blocks up in raw coal bunker exit easily, influences the boiler steady operation.
The existing raw coal bunker prevents the defect and deficiency of dredging technique:
(1) the motor vibration method comprises the following steps: the method can only work when there is a gap under the rapping point, otherwise the more and more the rapping; the position of the vibration hammer on the coal bunker is unchanged, and the vibration hammer is only suitable for the condition of slow flow or suspension under a vibration point; the vibration motor vibrates greatly and has noise, sometimes causes the liner plate on the wall of the bin to loosen, causes the vibration motor to fall off, and cannot run for a long time.
(2) An air blasting method: the air cannon can play a role when the cannon discharging point is just near the blocking position, and the positions of all the air cannons on the storage bin are fixed at present; if the blasting point is above the plugging point, the lower plugging point is compacted; when the material is very wet, the internal friction coefficient and the viscosity are high, only one hole can be drilled after blasting, the coal blockage condition still exists, and the blockage removal efficiency is not high.
(3) A spiral dredging method: the spiral dredging machine is essentially a scraping type dredging device (shown in the figure), and is driven by a motor and drives a scraper to rotate through the transmission of a speed reducer. The rotary cutter and the rotary cone form a spiral forced material conveying system, and the flowing state of the materials in the bin body is changed to be recovered from the central flow to the integral flow. The method can only remove the blockage problem of a small section of the blanking section, does not work on the upper fluffy coal, has a small blockage removal range and has poor blockage removal effect on the whole storage bin; when the lower part is blocked, the blockage dredging effect is poor; the long-time rotation, the part wearing and tearing are big, and the maintenance work load is big.
(4) The manual dredging method comprises the following steps: when the coal blockage is serious, the mechanical dredging method does not work, and the large hammer is forced to be used manually to knock the coal blockage part or the poking strip is forced to break the arch. There is serious potential safety hazard in artifical mediation method, if the coal blockage position is higher, need set up the scaffold frame, personnel high altitude construction uses to disclose the strip and exists very big safety risk when breaking the arch by the lower part, still can cause the raw coal to expose and pile up, pollutes the feeder platform, and the mediation effect is limited, wastes time and power.
In conclusion, in the existing anti-blocking dredging technology, the mechanical anti-blocking dredging technology can only dredge the local part of the raw coal bin, the whole bin is poor in blockage clearing effect, and the manual anti-blocking dredging technology has the problem of potential safety hazard.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that exists among the prior art, the utility model provides a stifled pull throughs is prevented to former coal bunker of thermal power factory solves the stifled pull throughs that prevents of present former coal bunker to the clear stifled effect of whole feed bin not good and the artifical problem that prevents stifled pull throughs and exist the potential safety hazard of technical existence.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a stifled pull throughs is prevented in former coal bunker of thermal power factory, includes that the air current sprays layer and pneumatic hammering layer, the air current sprays the layer and is equipped with a plurality of layers and air current and sprays the layer and be arranged in spraying high-pressure draught to the inner chamber in former coal bunker, pneumatic hammering layer is provided with a plurality of layers and pneumatic hammering layer setting on the lateral wall in former coal bunker, all be provided with air current between the pan feeding mouth and the discharge gate in former coal bunker and spray layer and/or pneumatic hammering layer.
Further, still include the suspension pipe, the discharge gate cover of raw coal storehouse is established in the suspension pipe, still the cover is equipped with the pan feeding mouth of coal feeder in the suspension pipe, all carry out sealing connection through soft sealing member between suspension pipe and the raw coal storehouse and between suspension pipe and the coal feeder.
Furthermore, the airflow jet layer is arranged at a position close to a raw coal bin feeding port, and the pneumatic hammering layer is arranged at a position close to a raw coal bin discharging port.
Furthermore, the air flow injection layer comprises a high-pressure air flow nozzle, an air nozzle of the high-pressure air flow nozzle is arranged in an inner cavity of the raw coal bin, and an air inlet of the high-pressure air flow nozzle is connected with a first air storage tank.
Furthermore, the air inlet of the high-pressure airflow nozzle penetrates through the side wall of the raw coal bin through a branch pipeline and is connected with an air outlet main pipeline of the same air storage tank arranged on the outer wall of the raw coal bin, control valves are arranged on the branch pipelines, and an air inlet valve is arranged on the main pipeline.
Furthermore, the air nozzle of the high-pressure air flow nozzle is inclined towards the discharge hole of the raw coal bunker.
Furthermore, the pneumatic hammering layer includes that the pneumatics shakes and beats the hammer, the power input end that the pneumatic hammer that shakes is connected the second gas holder, and the pneumatic hammer that shakes that is located the same layer is provided with four at least, and four pneumatics are shaken and are beaten the hammer and be located four directions in former coal bunker respectively.
Furthermore, the side wall of the raw coal bin is curved, the side wall of the raw coal bin is bent towards the inner cavity of the raw coal bin, and the inner diameter of the raw coal bin close to the feed inlet of the raw coal bin is larger than that of the raw coal bin close to the discharge outlet of the raw coal bin.
Furthermore, a plurality of observation holes are further formed in the side wall of the raw coal bunker, and when the observation holes are not used, the observation holes are sealed and blocked.
Furthermore, a raw coal bunker gate for opening or closing the inner cavity of the raw coal bunker is arranged at the position close to the discharge outlet of the raw coal bunker.
Compared with the prior art, the utility model discloses following beneficial effect has at least:
the utility model provides a raw coal bunker anti-blocking dredging device of a thermal power plant, which is characterized in that an air flow injection layer and a pneumatic hammering layer are arranged between a feeding port and a discharging port of the raw coal bunker to evenly distribute the anti-blocking dredging device on the path from the feeding port to the discharging port of the raw coal bunker, so that the raw coal bunker is not locally provided with the anti-blocking dredging device any more, and only local anti-blocking dredging can be satisfied, thereby leading the problem that the coal blockage is not smooth in the area of the raw coal bunker without the anti-blocking dredging device, the utility model can dredge the whole raw coal bunker, ensure the smooth coal flow of each section of the raw coal bunker, ensure the normal operation of the coal conveying of the coal feeder, has simple integral scheme, the change to former anti-blocking dredging system is less, and is rational in infrastructure, and reliable operation saves the cost, and the maintenance is convenient and the on-the-spot installation transformation of being convenient for, very big widening coal type adaptability improves coal utilization level.
Further, all carry out sealing connection through soft sealing member between suspension pipe and the former bunker and between suspension pipe and the feeder, let the former bunker have certain transverse displacement volume when guaranteeing that the coal stream in the former bunker can not get into external environment, coal blocking phenomenon takes place for the discharge gate of former bunker, discharge gate through strikeing the former bunker, thereby it can take place micro displacement to make the former bunker can not cause the former bunker's damage of former bunker and the former bunker of micro displacement also dredges the coal stream and plays certain additional role, it is unobstructed to ensure the coal stream of discharge gate from the pan feeding mouth of former bunker.
Further, the air current sprays the layer and establishes and be close to former coal bunker pan feeding mouth department, pneumatic hammering layer is established and is close to former coal bunker discharge gate department, wide self structure narrow down on the fully considered former coal bunker, the bottom in former coal bunker is the coal pile more easily and the pile intensity is higher with long-pending coal, the coal pile on former coal bunker upper portion is comparatively fluffy, the air current that former coal bunker upper portion was blown to the air current sprays the layer and blows former coal bunker upper portion flows, glutinous wall fluffy coal has been eliminated, pneumatic hammering layer beats former coal bunker bottom, promotes the coal pile dispersion, mediation raw coal bunker, the utility model discloses an air current sprays layer and pneumatic hammering layer reasonable in distribution, the unobstructed chute blockage phenomenon of raw coal bunker reduces.
Furthermore, high-pressure airflow is sprayed to the inner cavity of the raw coal bin through the high-pressure airflow nozzle, so that the coal flow in the raw coal bin generates pulse oscillation, and the generation of air holes can be prevented.
Furthermore, the air jet of the high-pressure airflow nozzle is inclined towards the discharge hole of the raw coal bin, and cyclone-type rotating airflow is formed between the wall of the raw coal bin and the materials. The airflow separates the material from the bin wall temporarily, reduces the friction coefficient between the material and the bin wall, increases the sliding force and eliminates the wall-sticking and shed coal.
Furthermore, the side wall of the raw coal bin is in a curve shape and is in a shape of rapidly contracting from top to bottom, so that the stress condition between the coal flow and the bulkhead is greatly optimized, and the falling of the coal flow is promoted.
Furthermore, the observation hole of seting up on the lateral wall of raw coal storehouse can observe the condition in the raw coal storehouse inner chamber thereby to adjust and control air current injection layer and pneumatic hammering layer, makes the raw coal storehouse clear stifled fast.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the high-pressure air flow nozzle of the present invention on a raw coal bunker;
in the drawings: the method comprises the following steps of 1-an airflow injection layer, 2-an observation hole, 3-a first gas storage tank, 4-a pneumatic rapping hammer, 5-a raw coal bin gate, 6-a gas supply pipeline, 7-a suspension pipe, 8-a raw coal bin discharge hole, 9-a coal feeder, 10-a high-pressure airflow nozzle, 11-a control valve, 12-an air inlet valve and 13-a raw coal bin.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description.
As shown in fig. 1, the utility model provides a stifled pull throughs is prevented to former coal bunker of thermal power factory, including jet-propelled layer 1 and pneumatic hammering layer, jet-propelled layer 1 is equipped with a plurality of layers and jet-propelled layer 1 and is arranged in jetting high-pressure draught to the inner chamber of former coal bunker 13, pneumatic hammering layer is provided with a plurality of layers and pneumatic hammering layer setting on the lateral wall of former coal bunker 13, all be provided with jet-propelled layer 1 and or pneumatic hammering layer between the pan feeding mouth and the discharge gate of former coal bunker 13.
Specifically, the airflow jet layer 1 includes a high-pressure airflow nozzle 10, an air jet of the high-pressure airflow nozzle 10 is installed in an inner cavity of a raw coal bunker 13, an air inlet of the high-pressure airflow nozzle 10 passes through a branch pipeline and is connected with an air outlet main pipeline on a first air storage tank 3 arranged on the side wall of the raw coal bunker 13 and the outer wall of the raw coal bunker 13, in this embodiment, an air inlet valve 12 is arranged on the air outlet main pipeline, control valves 11 are arranged on the branch pipelines, and an air inlet pipeline of the first air storage tank 3 is connected with an air supply pipeline 6 for supplementing air; preferably, the air jet of the high-pressure air flow nozzle 10 is inclined towards the raw coal bin outlet 8, and forms a cyclone-type rotating air flow between the bin wall and the materials. The airflow separates the materials from the bin wall for a short time, so that the friction coefficient between the materials and the bin wall is reduced, the downward sliding force is increased, and the wall-sticking fluffy coal is eliminated; and the air injection time, time interval and cycle period of the high-pressure air flow nozzle 10 are adjustable, and the air injection energy and impulse force of the nozzle are basically kept unchanged in the injection process and can be kept at the highest values. Because the volume of the first air storage tank 3 is dozens of times larger than that of the largest air cannon, multiple times of injection can be realized in a short time, so that the materials in the bin generate pulse oscillation, and air holes can be prevented from being generated.
Specifically, the pneumatic hammering layer adopts the pneumatic rapping hammer 4 that shakes, and the pneumatic power input end of rapping hammer 4 that shakes connects the second gas holder, and the pneumatic rapping hammer 4 that shakes that is located the same layer is provided with four at least, and four pneumatic rapping hammers 4 that shake are located four directions of former bunker 13 respectively, and the pneumatic rapping hammer 4 in this embodiment is provided with 3-4 layers, and every layer is four and is arranged in four directions of former bunker 13.
The discharge hole of the raw coal bunker 13 is connected with the feeding hole of the coal feeder through the suspension pipe 7, the discharge hole 8 of the raw coal bunker is sleeved in the inner cavity of the suspension pipe 7, the feeding hole of the coal feeder is sleeved in the inner cavity of the suspension pipe 7, the suspension pipe 7 and the discharge hole 8 of the raw coal bunker as well as the suspension pipe 7 and the feeding hole of the coal feeder are connected through soft sealing pieces, in the embodiment, the soft sealing pieces adopt soft rubber, so that trace displacement can occur between the raw coal bunker 13 and the suspension pipe 7, when the coal blockage phenomenon occurs at the discharge hole 9 of the raw coal bunker, the discharge hole 8 of the raw coal bunker can be knocked to dredge the raw coal bunker 13, the existence of the soft rubber enables the raw coal bunker 13 to generate trace displacement, thereby not only ensuring that coal flow in the raw coal bunker 13 cannot be emitted to the outside, but also assisting the raw coal bunker 13 to dredge.
In this embodiment, the side wall of the raw coal bunker 13 is curved, and the side wall of the raw coal bunker 13 is curved toward the inner cavity of the raw coal bunker 13, the inner diameter of the raw coal bunker 13 near the raw coal bunker feed inlet 8 is larger than the inner diameter of the raw coal bunker near the raw coal bunker discharge outlet 8, and the shrinkage of the cross section from the feed inlet to the discharge outlet of the curved raw coal bunker changes into a curve which is downward and is curved with a wide top and a narrow bottom, so that the stress condition between the coal flow and the bunker wall is greatly optimized, and the coal flow is promoted to fall.
In this embodiment, seted up a plurality of observation hole 2 on the lateral wall of former coal bunker 13, thereby can observe the condition in the 13 inner chambers of former coal bunker and regulate and control high-pressure draught nozzle 10 and pneumatic rapping hammer 4, when need not observe hole 2 to carry out sealed shutoff to observation hole 2 can.
In this embodiment, be provided with raw coal bunker flashboard door 5 near raw coal bunker discharge gate 8 department, open or close raw coal bunker 13 through control raw coal bunker flashboard door 5, can overhaul or other works after closing raw coal bunker 13.
In this embodiment, the utility model discloses a prevent stifled pull throughs can control through independent controller, and operating personnel shakes the working parameter of beating hammer 4 and the working parameter of high-pressure air flow nozzle 10 through operating panel direct control pneumatics in the other embodiment of the utility model, prevent the direct belt weigher interlocking with the feeder of stifled pull throughs, gather the weighing value of belt weigher through collection system, will weigh numerical value transmission to controller, be provided with coal flow weight threshold value in the controller, when weighing value and being less than this threshold value, directly start through the controller and prevent stifled pull throughs, pneumatic shake and beat hammer and high-pressure air flow nozzle synchronous working, realize full automation operation, convenient and fast more, guarantee boiler steady operation.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the technical solution of the present invention, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: those skilled in the art can still modify or easily conceive of changes in the technical solutions described in the foregoing embodiments or make equivalent substitutions for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides a stifled pull throughs is prevented in former coal bunker of thermal power factory, a serial communication port, including jet stream layer (1) and pneumatic hammering layer, jet stream layer (1) is equipped with a plurality of layers and jet stream layer (1) and is arranged in spraying high-pressure draught to the inner chamber of former coal bunker (13), pneumatic hammering layer is provided with a plurality of layers and pneumatic hammering layer and sets up on the lateral wall of former coal bunker (13), all be provided with jet stream layer (1) and/or pneumatic hammering layer between the pan feeding mouth and the discharge gate of former coal bunker (13).
2. The raw coal bunker blockage prevention and dredging device of the thermal power plant as claimed in claim 1, further comprising a suspension pipe (7), wherein a discharge hole of the raw coal bunker (13) is sleeved in the suspension pipe (7), a feeding hole of a coal feeder (9) is further sleeved in the suspension pipe (7), and the suspension pipe (7) and the raw coal bunker (13) and the suspension pipe (7) and the coal feeder (9) are hermetically connected through soft sealing members.
3. The raw coal bunker blockage prevention and dredging device of the thermal power plant as claimed in claim 1, wherein the airflow injection layer (1) is arranged close to a raw coal bunker inlet, and the pneumatic hammering layer is arranged close to a raw coal bunker outlet.
4. The raw coal bunker blockage prevention and dredging device of the thermal power plant as claimed in claim 1, wherein the airflow injection layer (1) comprises a high-pressure airflow nozzle (10), an air injection port of the high-pressure airflow nozzle (10) is installed in an inner cavity of the raw coal bunker (13), and an air inlet of the high-pressure airflow nozzle (10) is connected with the first air storage tank (3).
5. The raw coal bunker blockage prevention and dredging device of the thermal power plant as claimed in claim 4, wherein an air inlet of the high-pressure air flow nozzle (10) passes through a side wall of the raw coal bunker (13) through a branch pipeline and is connected with an air outlet main pipeline of the same air storage tank arranged on the outer wall of the raw coal bunker (13), control valves (11) are arranged on the branch pipelines, and an air inlet valve (12) is arranged on the main pipeline.
6. The raw coal bunker blockage prevention and dredging device of the thermal power plant as claimed in claim 4, wherein the gas nozzle of the high-pressure gas flow nozzle (10) is inclined towards the discharge hole of the raw coal bunker (13).
7. The raw coal bunker blockage prevention and dredging device of the thermal power plant as claimed in claim 1, wherein the pneumatic hammering layer comprises pneumatic rapping hammers (4), the power input end of each pneumatic rapping hammer (4) is connected with a second air storage tank, at least four pneumatic rapping hammers (4) are arranged on the same layer, and the four pneumatic rapping hammers (4) are respectively arranged in four directions of the raw coal bunker (13).
8. The raw coal bunker blockage prevention and dredging device of the thermal power plant as claimed in claim 1, wherein the side wall of the raw coal bunker (13) is curved, the side wall of the raw coal bunker (13) is bent towards the inner cavity of the raw coal bunker (13), and the inner diameter of the raw coal bunker (13) close to the raw coal bunker feeding hole is larger than the inner diameter of the raw coal bunker (13) close to the raw coal bunker discharging hole (8).
9. The raw coal bunker blockage prevention and dredging device for the thermal power plant as claimed in claim 1, wherein a plurality of observation holes (2) are further formed in the side wall of the raw coal bunker (13), and when the observation holes (2) are not used, the observation holes (2) are sealed and blocked.
10. The raw coal bunker blockage prevention and dredging device of the thermal power plant as claimed in claim 1, wherein a raw coal bunker gate (5) for opening or closing an inner cavity of a raw coal bunker (13) is arranged close to a raw coal bunker discharge hole (8).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022781214.0U CN213736768U (en) | 2020-11-25 | 2020-11-25 | Stifled pull throughs is prevented in former coal bunker of thermal power factory |
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| CN202022781214.0U CN213736768U (en) | 2020-11-25 | 2020-11-25 | Stifled pull throughs is prevented in former coal bunker of thermal power factory |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113928743A (en) * | 2021-09-17 | 2022-01-14 | 华能营口热电有限责任公司 | Resonance type raw coal bucket vibration beating mechanism applied to thermal power coal supply system |
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2020
- 2020-11-25 CN CN202022781214.0U patent/CN213736768U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113928743A (en) * | 2021-09-17 | 2022-01-14 | 华能营口热电有限责任公司 | Resonance type raw coal bucket vibration beating mechanism applied to thermal power coal supply system |
| CN113928743B (en) * | 2021-09-17 | 2022-11-08 | 华能营口热电有限责任公司 | Resonance type raw coal bucket vibration beating mechanism applied to thermal power coal supply system |
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