CN105731081A - Air knife rotary cutting type coal falling pipe cleaning-up device - Google Patents
Air knife rotary cutting type coal falling pipe cleaning-up device Download PDFInfo
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- CN105731081A CN105731081A CN201610206247.8A CN201610206247A CN105731081A CN 105731081 A CN105731081 A CN 105731081A CN 201610206247 A CN201610206247 A CN 201610206247A CN 105731081 A CN105731081 A CN 105731081A
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- fluidizer
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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
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/66—Use of indicator or control devices, e.g. for controlling gas pressure, for controlling proportions of material and gas, for indicating or preventing jamming of material
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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
- B65G2201/00—Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
- B65G2201/04—Bulk
- B65G2201/045—Sand, soil and mineral ore
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- Mechanical Engineering (AREA)
- Air Transport Of Granular Materials (AREA)
Abstract
The invention discloses an air knife rotary cutting type coal falling pipe cleaning-up device, and belongs to the technical field of coal conveying of thermal power plants. The cleaning-up device comprises a coal falling pipe assembly, an air source system, a flowing aid system, a signal acquisition system and a control system, wherein the air source system comprises a thermal power plant air supply pipeline, a first manual ball valve serving as an air source main valve, a check valve, a lowest pressure retaining valve, an air intake pipe, air storage tanks and a first electric control pneumatic butterfly valve serving as an air outlet main valve; the flowing aid system comprises a main control pipeline, a master control pipeline, a main flowing aid pipeline, a master flowing aid pipeline, slave flowing aid pipelines, second electric control pneumatic butterfly valves, annular flowing aid pipelines, flowing aid nozzles, an electromagnetic valve serving as an electric air source switch and a second electric control pneumatic actuator; the master flowing aid pipeline is longitudinally arranged on a pipe body of a coal falling pipe; the flowing aid nozzles are respectively arranged in the annular flowing aid pipelines. The air knife rotary cutting type coal falling pipe cleaning-up device has the characteristics of simple structure, small vibration, convenience in operation, high automation degree, low cost, quickness and thoroughness in cleaning up and the like.
Description
Technical field:
The invention belongs to the defeated coal technical field in thermal power plant, relate to the device of run coal bin coal spout blocking dredging, particularly relate to a kind of air knife rotary-cutting type dropping coal tube blockage-clearing device.
Background technology:
In heat power plant boiler system, the normal operation of powder manufacturing apparatus is the key of boiler normal combustion, and the whether normal key being to directly affect pulverized coal preparation system of coal supply, it is to ensure that the key of Boiler Stable Combustion.Thus in boiler normal operation, hyperbola run coal bin normal feed it is critical that.But in actual coal supply process, owing to the ashes of coal is high, viscosity is big, time have foreign material to be mixed into, particularly rainy season raw coal moisture content significantly high, humidity is very big, increase raw coal with the frictional force between coal bunker wall, raw coal can not flow to discharging opening by deadweight and enter feeder, result in blockage scaffold, again owing to coal humidity is very big, the coefficient of internal friction causing coal increases, cohesiveness strengthens, cause arcuation scaffold, discharging opening is unsettled, cause delay or cutout, cause that the coal amount entering coal pulverizer is unstable, affect the operation of coal pulverizer and follow-up equipment, further result in boiler combustion shakiness, unit load shedding, reduce the safety and economic operation efficiency of boiler.
The cyclone type thermal power plant coal bunker block clearing equipment of Chinese patent CN104773478A offer and using method, the method overcomes air bubble and vibration hammer block clearing method in block clearing process, owing to not knowing the particular location of blocking point, when blowing out a little or do not blow out in blocking point position or vibrate in oscillation point, and produce more serious blocking, overcome machinery peeling knife block clearing method and rotate coal bunker block clearing method and can only remove the blocking of a bit of coal bunker, it is helpless when but the method occurs at the position of block clearing section above and below to block, block clearing scope is less, additionally the method has mechanical transmissioning piece, easy material leakage easy to wear, and it is not thorough to there is block clearing, self easy putty, the problems such as maintenance load is big.Cyclone type thermal power plant coal bunker block clearing equipment and using method that Chinese patent CN104773478A provides solve only in coal handling system feeder with the coal bunker blocking problem of upper bit, and at feeder with the dropping coal tube position down to coal pulverizer, blocking also often occurs, solve the blocking of dropping coal tube, be that current urgent need solves the technical problem that.The method that the blocking of currently processed dropping coal tube adopts also is air bubble or vibration hammer, and the drawback of its existence is identical with above-mentioned coal bunker block clearing.
Summary of the invention:
The present invention is directed to prior art and there are the problems referred to above, a kind of air knife rotary-cutting type dropping coal tube blockage-clearing device is provided, it is thus possible to fundamentally thoroughly solve the dropping coal tube chute blockage fault owing to a variety of causes causes, ensure that coal pulverizer runs well, also it is supplementing and perfect Chinese patent CN104773478A simultaneously, making generating set coal-supply system by coal bunker through feeder, dropping coal tube obtains effective block clearing to coal pulverizer, defeated coal whole process.
The present invention is the reason that dropping coal tube blocking scaffold occurs in analyzing in detail, the internal friction resistance that the main cause of dropping coal tube generation blocking is coal is very big, although dropping coal tube is vertical placement, deadweight is not had to be pressed on tube wall, but coal spout diameter is relatively small, coal can produce very large lateral pressure power in downglide motion in pipe when flow increases, it is pressed on tube wall, and produce coal with the frictional resistance between tube wall, this resistance is the basic resistance producing arcuation scaffold, add the cohesiveness of coal self very big, thus what produce in coal spout is arcuation scaffold.The broken arch principle of the present invention is: spray high pressure draught in dropping coal tube, makes this air-flow along tube wall high speed rotating, forms rotary-cutting type air knife, and this air knife can scrape coal charge on Pipe Cutting wall so as to coal is with tube wall separation of short duration, removes the basic resistance of arcuation scaffold.It is simultaneously based on cyclonic principle what high pressure draught rotated, the air pressure of pipe inner rim is higher than central pressure in pipe, thus the air-flow of periphery can flow to tube hub, forms upset ascending air upwards, this air-flow can produce axial shearing force, and this shearing force can effectively abolish the scaffold arch in pipe.The present invention and cyclone type block clearing, the difference is that the shearing force being strengthened ascending air by change structure parameter and running parameter, increase the dynamics of broken arch.
A kind of air knife rotary-cutting type dropping coal tube blockage-clearing device provided by the present invention includes dropping coal tube assembly 17, air supply system, fluidizer system, signal acquiring system and control system；Described dropping coal tube assembly 17 includes feeder outlet material-falling hopper 29, gate 30, dropping coal tube 31 and adjustable joint 33, and described dropping coal tube assembly 17 is positioned at the bottom of feeder 28 discharging opening；Described air supply system includes power plant supply air line 1, keeps valve 4, air inlet pipeline 5, air accumulator 10 and the first ecp butterfly valve 7 as fluidizer total valve as the first manual ball valve 2 of source of the gas total valve, non-return valve 3, minimum pressure, and described first ecp butterfly valve 7 is connected with the first ecp executor 6；The compression air of described air supply system is divided into two tunnels by described power plant supply air line 1 after described first manual ball valve 2 accesses fluidizer system, one tunnel keeps valve 4 to enter described air accumulator 10 through described non-return valve 3 and minimum pressure successively, enters main fluidizer pipeline 12 then through total fluidizer pipeline the 11, second manual ball valve 9 and described first ecp butterfly valve 7；Another road enters main control pipeline 13 through the 4th manual ball valve 27, source of the gas process three linked piece 25 and electromagnetic valve 23 successively.
Described fluidizer system include master control pipeline 26, main control pipeline 13, total fluidizer pipeline 11, main fluidizer pipeline 12, point fluidizer pipeline the 14, second ecp butterfly valve 15, annular fluidizer pipeline 18, fluidizer nozzle 20, as the Pressure gauge 8, second with signal transmitter of the electromagnetic valve 23, first of the automatically controlled gas source switch Pressure gauge 24 with signal transmitter and the second ecp executor 16；Described second Pressure gauge 24 with signal transmitter is arranged on described master control pipeline 26, described first Pressure gauge 8 with signal transmitter is arranged on described total fluidizer pipeline 11, and described second ecp executor the 16, second ecp butterfly valve 15 is arranged on point fluidizer pipeline 14.
Described main fluidizer pipeline 12 is disposed longitudinally on the body of described dropping coal tube 31, described main fluidizer pipeline 12 carries fluidizer gas to described point of fluidizer pipeline 14, and point fluidizer pipeline 14 is supplied to described annular fluidizer pipeline 18 and fluidizer nozzle 20 by described second ecp butterfly valve 15；Described annular fluidizer pipeline 18 is provided with four groups altogether, one group of described annular fluidizer pipeline 18 is fixed in the external wall of upper portion of feeder outlet coal breakage bucket 29 by support, on other three groups of outer walls being distributed on dropping coal tube 31 of described annular fluidizer pipeline 18, described annular fluidizer pipeline 18 is respectively equipped with described fluidizer nozzle 20, often organize uniform four described fluidizer nozzles 20 in described annular fluidizer pipeline 18, described fluidizer nozzle 20 is fixed by screws on nozzle carrier, described nozzle carrier is welded on described dropping coal tube tube wall 22, one end of described fluidizer nozzle 20 is led in the body of described dropping coal tube 31 by the through hole arranged on described dropping coal tube tube wall 22, the other end of described fluidizer nozzle 20 is connected with annular fluidizer pipeline 18 by connecting hose；One end of annular fluidizer pipeline 18 is equipped with dismountable boring cover 21, and the other end of annular fluidizer pipeline 18 is equipped with the 3rd manual ball valve 19.
Described signal acquiring system includes coal breakage signal transducer 32, and described coal breakage signal transducer 32 is arranged on described dropping coal tube 31 and enters the porch of coal pulverizer 34, and described coal breakage signal transducer 32 is connected with described control system by holding wire；Described control system includes electric cabinet 35, and electric cabinet 35 is fixed on the right side of the control chamber of feeder 28, and described electric cabinet 35 is with the original control system grid connection in power plant, it is possible to realization is manual, automatic, scene, remotely control and transfer function.
The present invention compared with block clearing equipment as manually beaten, the method such as air bubble, vibration hammer compares, there is simple in construction, vibrate little, simple to operation, automaticity is high, the low block clearing of cost quickly thoroughly and the technical characterstic such as safety and environmental protection, be one of best at present dropping coal tube blockage-clearing device.
Accompanying drawing illustrates:
Fig. 1: air knife rotary-cutting type dropping coal tube blockage-clearing device pipe-line system schematic diagram of the present invention；
Fig. 2: air knife rotary-cutting type dropping coal tube blockage-clearing device structural representation of the present invention.
In figure: 1: power plant supply air line；2: the first manual ball valves；3: non-return valve；4: minimum pressure keeps valve；5: air inlet pipeline；6: the first ecp executors；7: the first ecp butterfly valves；8: the first Pressure gauges with signal transmitter；9: the second manual ball valves；10: air accumulator；11: total fluidizer pipeline；12: main fluidizer pipeline；13: main control pipeline；14: point fluidizer pipeline；15: the second ecp butterfly valves；16: the second ecp executors；17: dropping coal tube assembly；18: annular fluidizer pipeline；19: the three manual ball valves；20: fluidizer nozzle；21: boring cover；22: dropping coal tube tube wall；23: electromagnetic valve；24: the second Pressure gauges with signal transmitter；25: source of the gas processes three linked piece；26: master control pipeline；27: the four manual ball valves；28: feeder；29: coal machine outlet material-falling hopper；30: gate；31: dropping coal tube；32: coal breakage signal transducer；33: adjustable joint；34: coal pulverizer；35: electric cabinet.
Detailed description of the invention:
As shown in Figures 1 and 2: power plant supply air line 1, being the total air supply source as the present invention, from the total compression air station in power plant, its total air demand is not less than 40M3/ min, pressure is not less than 0.6Mpa.First manual ball valve 2, as manually total gas source switch of this device, its latus rectum is 20mm, under meet three way cock, a-road-through is to the 4th manual ball valve 27 controlled in gas circuit, and the non-return valve 3 of fluidizer system is led on another road, and non-return valve 3 is to prevent the reverse flowing of air flows of air accumulator 10 in fluidizer system.Minimum pressure maintenance valve 4 is the protection device of gas grid; being fluidizer system separated with gas grid, when fluidizer system uses gas in a large number in moment, pressure declines does not affect gas net pressure oscillation; other uses gas point gas safety to ensure gas net, and minimum pressure keeps the unlatching pressure of valve 4 to be arranged on 0.4Mpa.
Air inlet pipeline 5 supplies to air accumulator 10 through three way cock, the exhaustor parallel connection of air accumulator leads to the first ecp butterfly valve 7 through total fluidizer pipeline the 11, second manual ball valve 9 and the first Pressure gauge 8 with signal transmitter, first ecp executor 6 is connected on the first ecp butterfly valve 7, and the first ecp butterfly valve 7 is the total ecp source of the gas total valve as fluidizer system.The latus rectum 50mm of main fluidizer pipeline 12, it is be longitudinally arranged on the body of coal spout along dropping coal tube, fluidizer pipeline 14 is divided to supply to each layer, and supply to the second ecp butterfly valve 15 of each layer, (totally four layers) second ecp butterfly valve 15 of each layer supplies to respective annular fluidizer pipeline 18 and respective fluidizer nozzle 20 thereof, (every layer sets 4 four nozzles) totally 16 nozzles.The latus rectum of the second ecp butterfly valve 15 is 50mm, the latus rectum 50mm of annular fluidizer pipeline 18, and the area of fluidizer jet mouth lower than the 1/4 of the drift diameter area of annular fluidizer pipeline 18, its objective is to ensure that fluidizer nozzle 20 can have higher jet velocity.Annulus line 18, it is fixed on the outer wall of coal spout by support, fluidizer nozzle 20 is connected with annulus line 18 by connecting hose, fluidizer nozzle 20 is fixed by screws on nozzle carrier, nozzle carrier is welded on dropping coal tube tube wall 22, one end of fluidizer nozzle 20 is led in the body of dropping coal tube 31 by the through hole arranged on dropping coal tube tube wall 22, and the other end of fluidizer nozzle 20 is connected with annular fluidizer pipeline 18.One end of annular fluidizer pipeline 18 is equipped with dismountable boring cover 21, and the other end of annular fluidizer pipeline 18 is equipped with the 3rd manual ball valve 19.The area of passage of fluidizer nozzle 20 lower than described annular fluidizer pipeline 18 area of passage 1/4, between described fluidizer nozzle 20 and horizontal plane formed jet angle be 25 °-30 °, make air-flow be close to coal spout inwall and spray clockwise.
4th manual ball valve 27 is total manually-operated gate of pneumatic control system, process the three linked piece 25, second air gauge 24 with signal transmitter and electromagnetic valve 23 by master control pipeline 26, source of the gas to be connected composition control pipe-line system with main control pipeline 13, its pipeline trend is arranged in juxtaposition with fluidizer piping, control piper latus rectum 20mm.Main control pipeline 13 has four tunnels to lead to the second ecp executor 16 of respective butterfly valve, dropping coal tube assembly 17 is positioned at the discharging opening bottom of feeder 28, dropping coal tube assembly 17 includes feeder outlet material-falling hopper 29, gate 30, dropping coal tube 31 and adjustable joint 33, and the bottom of dropping coal tube assembly 17 is inserted in coal pulverizer 34.
Signal acquiring system is arranged on dropping coal tube 31 and enters the porch of coal pulverizer 34, and when the disconnected coal of coal spout, first-selection to determine the whether disconnected coal of feeder, when coal signal do not sent out disconnected by feeder, and coal spout sends disconnected coal signal, explanation is coal breakage blocking, and this signal could control the work of coal spout blockage removal system.When feeder sends disconnected coal signal, although coal spout is disconnected coal also, but coal breakage does not start blockage-clearing device.Control chamber of the present invention is with the original control system grid connection in power plant, it may be achieved manually, automatically, scene, remotely control and transfer function.
Claims (2)
1. air knife rotary-cutting type dropping coal tube blockage-clearing device, it is characterised in that this block clearing equipment includes dropping coal tube assembly (17), air supply system, fluidizer system, signal acquiring system and controls system；Described dropping coal tube assembly (17) includes feeder outlet material-falling hopper (29), gate (30), dropping coal tube (31) and adjustable joint (33), and described dropping coal tube assembly (17) is positioned at the bottom of feeder (28) discharging opening；Described air supply system includes power plant supply air line (1), keeps valve (4), air inlet pipeline (5), air accumulator (10) and the first ecp butterfly valve (7) as fluidizer total valve as first manual ball valve (2) of source of the gas total valve, non-return valve (3), minimum pressure, and described first ecp butterfly valve (7) is connected with the first ecp executor (6)；The compression air of described air supply system is divided into two tunnels by described power plant supply air line (1) after described first manual ball valve (2) access fluidizer system, one tunnel keeps valve (4) to enter described air accumulator (10) through described non-return valve (3) and minimum pressure successively, enters main fluidizer pipeline (12) then through total fluidizer pipeline (11), the second manual ball valve (9) and described first ecp butterfly valve (7)；Another road processes three linked piece (25) and electromagnetic valve (23) entrance main control pipeline (13) through the 4th manual ball valve (27), source of the gas successively；Described fluidizer system includes master control pipeline (26), main control pipeline (13), total fluidizer pipeline (11), main fluidizer pipeline (12), divide fluidizer pipeline (14), second ecp butterfly valve (15), annular fluidizer pipeline (18), fluidizer nozzle (20), described electromagnetic valve (23) as automatically controlled gas source switch, first Pressure gauge (8) with signal transmitter, second Pressure gauge (24) with signal transmitter and the second ecp executor (16)；Described second Pressure gauge (24) with signal transmitter is arranged on described master control pipeline (26), described first Pressure gauge (8) with signal transmitter is arranged on described total fluidizer pipeline (11), and described second ecp executor (16), the second ecp butterfly valve (15) are arranged on point fluidizer pipeline (14)；Described main fluidizer pipeline (12) is disposed longitudinally on the body of described dropping coal tube (31), described main fluidizer pipeline (12) carries fluidizer gas to described point of fluidizer pipeline (14), and described point of fluidizer pipeline (14) is supplied to described annular fluidizer pipeline (18) and described fluidizer nozzle (20) by described second ecp butterfly valve (15)；nullDescribed annular fluidizer pipeline (18) is provided with four groups altogether，One group of described annular fluidizer pipeline (18) is fixed in the external wall of upper portion of described feeder outlet material-falling hopper (29) by support，On other three groups of outer walls being distributed on described dropping coal tube (31) of described annular fluidizer pipeline (18)，Described annular fluidizer pipeline (18) is provided with described fluidizer nozzle (20)，Often organize uniform four described fluidizer nozzles (20) in described annular fluidizer pipeline (18)，Described fluidizer nozzle (20) is fixed by screws on nozzle carrier，Described nozzle carrier is welded on described dropping coal tube tube wall (22)，One end of described fluidizer nozzle (20) is led in the body of described dropping coal tube (31) by the upper through hole arranged of described dropping coal tube tube wall (22)，The other end of described fluidizer nozzle (20) is connected with described annular fluidizer pipeline (18) by connecting hose，One end of described annular fluidizer pipeline (18) is equipped with dismountable boring cover (21),The other end of described annular fluidizer pipeline (18) is equipped with the 3rd manual ball valve (19)；Described signal acquiring system includes coal breakage signal transducer (32), described coal breakage signal transducer (32) is arranged on described dropping coal tube (31) and enters the porch of coal pulverizer (34), and described coal breakage signal transducer (32) is connected with described control system by holding wire；Described control system includes electric cabinet (35), described electric cabinet (35) is fixed on the right side of the control chamber of described feeder (28), described electric cabinet (35) is with the original control system grid connection in power plant, it is capable of manual, automatic, scene, remotely control and transfer function.
2. a kind of air knife rotary-cutting type dropping coal tube blockage-clearing device according to claim 1, it is characterized in that the 1/4 of the area of passage of described fluidizer nozzle (20) area of passage lower than described annular fluidizer pipeline (18), the jet angle formed between described fluidizer nozzle (20) and horizontal plane is 25 °-30 °, makes air-flow be close to coal spout inwall and sprays clockwise.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610206247.8A CN105731081A (en) | 2016-04-01 | 2016-04-01 | Air knife rotary cutting type coal falling pipe cleaning-up device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610206247.8A CN105731081A (en) | 2016-04-01 | 2016-04-01 | Air knife rotary cutting type coal falling pipe cleaning-up device |
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| CN105731081A true CN105731081A (en) | 2016-07-06 |
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| CN201610206247.8A Pending CN105731081A (en) | 2016-04-01 | 2016-04-01 | Air knife rotary cutting type coal falling pipe cleaning-up device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106829229A (en) * | 2017-04-18 | 2017-06-13 | 马鞍山市天工科技股份有限公司 | Integrated module type double-curve coal hopper block clearing equipment and application method |
| CN107054912A (en) * | 2017-04-18 | 2017-08-18 | 马鞍山市天工科技股份有限公司 | Integrated module type dropping coal tube blockage-clearing device |
| CN112224890A (en) * | 2020-08-28 | 2021-01-15 | 苏州科舵工程技术有限公司 | Full-automatic powder conveying system |
| CN113617505A (en) * | 2021-08-06 | 2021-11-09 | 西安热工研究院有限公司 | System and method for early warning deflagration inside medium-speed coal mill |
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| CN205471659U (en) * | 2016-04-01 | 2016-08-17 | 马鞍山市天工科技股份有限公司 | Clear stifled device of coal breakage pipe under air knife rotary -cut formula |
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| DE3716047A1 (en) * | 1987-05-14 | 1988-12-01 | Behn Maschf | Method and device for operating a filling apparatus for dust-like or granular material |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106829229A (en) * | 2017-04-18 | 2017-06-13 | 马鞍山市天工科技股份有限公司 | Integrated module type double-curve coal hopper block clearing equipment and application method |
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| CN112224890A (en) * | 2020-08-28 | 2021-01-15 | 苏州科舵工程技术有限公司 | Full-automatic powder conveying system |
| CN112224890B (en) * | 2020-08-28 | 2022-07-05 | 苏州科舵工程技术有限公司 | Full-automatic powder conveying system |
| CN113617505A (en) * | 2021-08-06 | 2021-11-09 | 西安热工研究院有限公司 | System and method for early warning deflagration inside medium-speed coal mill |
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Application publication date: 20160706 |