CN206488272U - A kind of continual and steady coal feeder in stokehold - Google Patents
A kind of continual and steady coal feeder in stokehold Download PDFInfo
- Publication number
- CN206488272U CN206488272U CN201621262647.2U CN201621262647U CN206488272U CN 206488272 U CN206488272 U CN 206488272U CN 201621262647 U CN201621262647 U CN 201621262647U CN 206488272 U CN206488272 U CN 206488272U
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- Prior art keywords
- coal
- chassis
- level control
- hot
- control storehouse
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- 239000003245 coal Substances 0.000 title claims abstract description 135
- 229910052751 metal Inorganic materials 0.000 claims abstract description 18
- 239000002184 metal Substances 0.000 claims abstract description 18
- 238000010438 heat treatment Methods 0.000 claims abstract description 17
- 239000011229 interlayer Substances 0.000 claims abstract description 15
- 230000003139 buffering effect Effects 0.000 claims abstract description 10
- 239000010687 lubricating oil Substances 0.000 claims abstract description 9
- 238000007790 scraping Methods 0.000 claims abstract description 4
- 238000003780 insertion Methods 0.000 claims abstract description 3
- 230000037431 insertion Effects 0.000 claims abstract description 3
- 239000000872 buffer Substances 0.000 claims abstract 2
- 238000007599 discharging Methods 0.000 claims description 17
- 238000007789 sealing Methods 0.000 claims description 5
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000010626 work up procedure Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 2
- 238000002485 combustion reaction Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910052755 nonmetal Inorganic materials 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 239000003250 coal slurry Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000006392 deoxygenation reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Feeding And Controlling Fuel (AREA)
Abstract
A kind of continual and steady coal feeder in stokehold, including to coal bunker buffering cone, crank scraper, motor, chassis, middle Level control storehouse, lubricating oil supplies, level-sensing device, Gravimetric Coal Feeders, pneumatic lock gate hatch, circular metal expansion joint, distinguished and admirable compensator, heating interlayer and hot-blast pipe line.Steam coal is initially entered to buffer to coal bunker and bored, coal charge bores the crank scraper scraping delivery in the connecting base plate of bottom to the middle Level control storehouse of bottom by buffering, wherein motor driving of the crank scraper immediately below chassis, lubricating oil supplies are located between chassis and motor；In the middle of level-sensing device insertion in Level control storehouse；After Gravimetric Coal Feeders of the coal charge via middle Level control storehouse bottom, pneumatic lock gate hatch, circular metal expansion joint and heating interlayer are passed downwardly through successively and enters burner hearth；Distinguished and admirable compensator is installed in the bypass of heating interlayer, hot-blast pipe line is connected in distinguished and admirable compensator lower end, hot blast is directly entered burner hearth via the pipeline.Its is simple in construction, safe and efficient, and stability is strong, and emission reduction consumption reduction effect is obvious.
Description
Technical field
The utility model is related to coal feeder before a kind of Boiler Furnace, especially a kind of to be applied to power plant cycle fluidized-bed combustion boiler
The continual and steady coal feeder in stokehold.
Background technology
At present, domestic and international front coal feeding system of CFB boiler principal mode has two kinds, and the first is one-level to coal
System, idiographic flow is：Coal bunker → stokehold belt coal-feeding machine → coal spout → burner hearth；Another is two grades of coal supply systems, specifically
Flow is：Coal bunker → stokehold belt coal-feeding machine → coal spout → Scraper → give coal inclined tube → burner hearth.Meet coal moisture
When big or coal slurry content is high there is coal bunker canopy coal in both front coal feeding systems, and coal pipe coal blockage is thick to coal seam on coal belt
Degree is uneven, and coal-supplying amount fluctuates the phenomenon such as big, it is impossible to reach the continual and steady requirement for sparing to coal, very big shadow is produced to boiler combustion
Ring, put into a large amount of manpowers and dredged, needing load down to run or throw when serious, oil is combustion-supporting, the operational ton increase of operations staff, stove
Interior coking, SO2 and NOx emission fluctuation are big easily exceeded.
With the development of circulating fluidized bed technique, continual and steady operation of the high parameter large sized unit to front coal feeding system
It is required that more and more stricter, especially supercritical circulating fluidized bed boiler is higher to the reliability requirement of coal supply system, and frequently break coal
Very big puzzlement is brought to Boiler Stable Combustion, lifting load, SO2 and NOx emission.
The content of the invention
The purpose of this utility model be overcome the shortcomings of the prior art there is provided one kind it is simple in construction, to coal
Uniformly, the continual and steady coal feeder in stokehold that reliability is high, effect is good.
To achieve the above object, the continual and steady coal feeder in stokehold of the present utility model, including to coal bunker buffering cone, crank
Scraper, motor, chassis, middle Level control storehouse, lubricating oil supplies, level-sensing device, Gravimetric Coal Feeders, pneumatic flashboard
Door, circular metal expansion joint, distinguished and admirable compensator, heating interlayer and hot-blast pipe line；Described is in back taper to coal bunker buffering cone, if
Coal bunker people bottom is given in bucket shape, coal bunker buffering cone bottom chassis is provided with, chassis bottom is provided with middle Level control storehouse, chassis
It is provided with the crank scraper in the middle Level control storehouse of coal charge scraping delivery to bottom, crank scraper is by being located at immediately below chassis
Motor drives, and described lubricating oil supplies are located between chassis and motor；In the middle of described level-sensing device insertion
In Level control storehouse；The bottom in described middle Level control storehouse is provided with Gravimetric Coal Feeders, and the discharge outlet of Gravimetric Coal Feeders connects
There is discharging standpipe, the bottom of discharging standpipe is connected with the charging inclined tube for leading to connection burner hearth entrance, the discharging of the Gravimetric Coal Feeders
Pneumatic lock gate hatch and circular metal expansion joint are sequentially provided with pipeline, coal charge is weighed to coal via middle Level control storehouse bottom
After machine, pneumatic lock gate hatch, circular metal expansion joint and pan feeding inclined tube are passed downwardly through successively along the discharging standpipe of coal machine and enters burner hearth；
Discharging standpipe below described circular metal expansion joint is provided with the bypass line being connected with hot-blast pipe line, bypass line and set
There is distinguished and admirable compensator, the front end of the hot-blast pipe line is connected with the entrance of burner hearth, and hot blast enters burner hearth through hot-blast pipe line.
The crank scraper and the shell on chassis are tongue and groove fastening structure, and the bottom of chassis case is goed deep into crank scraper front portion
Portion.
Described distinguished and admirable compensator is 1-3.
The discharging standpipe of the Gravimetric Coal Feeders is cylindrical stainless steel wear-resistant pipe.
Described charging inclined tube is provided with the heating interlayer through Hot-blast Heating.
Set between described charging inclined tube and heating interlayer facilitate work-up and block clearing operation disc type flexible sealing inspection
Repair door.
Beneficial effect：The utility model solves the problem of coal bunker canopy coal, coal pipe coal blockage and big coal-supplying amount fluctuation, it is ensured that
Boiler combustion is stable, and temperature field in furnace is evenly distributed, discharge that is stable and reducing SO2 and NOx furnace outlets.According to stokehold
Disconnected coal position and mechanism, take segmented to suit the remedy to the case, the problem of solving coal bunker canopy coal and coal pipe coal blockage, so as to ensure that
Coal seam thickness on feeder belt is consistent, is accurately measured beneficial to feeder weighing system, realizes the peace of front coal feeding system
Full stable operation, has reached the purpose continued precisely to coal.Compared with prior art, coal bunker canopy coal is efficiently solved, to coal
Inclined tube chute blockage, to coal is uneven, expansion joint drawing crack the problems such as, main advantage is as follows：
(1) using vertical crank conveyer and middle Level control storehouse as the connection equipment between coal bunker and feeder,
The coal in coal bunker farthest can be burnt empty, thoroughly solve the problems such as bulkhead hangs coal, canopy coal in storehouse, put up a bridge, the side of improving
The dischargeable capacity of shape coal bunker, it is possible to decrease the construction costs of coal bunker and deoxygenation bunker bay civil engineering structure；
(2) vertical crank conveyer and matching for Gravimetric Coal Feeders coal-supplying amount are good, equal to the coal seam thickness on coal belt
Even, the tracking of feeder weighing system is good, and the adjustment of coal amount is accurate timely, improves the varying duty regulating power of boiler.It is steady to coal
It is fixed uniformly to ensure that flameholding in bed temperature uniformity and stove, improve the burn-off rate of fuel, control SO2 and NOx fluctuations, drop
Low SO2 and NOx discharge capacity, reduce the input cost of auxiliary environmental protection facility；
(3) circular standpipe and expansion joint are used, standpipe abrasion and type metal expansion joint stress drawing crack is solved the problems, such as, extends
The service life of equipment；
(4) Hot-blast Heating interlayer is set to coal inclined tube, strengthens drying functions of the hot blast to coal stream, prevent the bottom plate of inclined tube
It is stained with coal, it is to avoid inner product coal causes chute blockage failure；
(5) coal spread wind pipe optimization design, improves the compensation ability of non-metal expansion joint, solves non-metal expansion joint frequency
The problem of numerous drawing crack, improve the operation stability of as-fired coal system.
Brief description of the drawings
Fig. 1 is the continual and steady coal feeder schematic diagram in stokehold of the present utility model.
In figure：1- is to Level control storehouse, 6- in the middle of coal bunker buffering cone, 2- cranks scraper, 3- motors, 4- chassis, 5-
Lubricating oil supplies, 7- level-sensing devices, 8- Gravimetric Coal Feeders, the pneumatic lock gate hatches of 9-, 10- circular metals expansion joint, 11- are distinguished and admirable to be mended
Repay device, 12- heating interlayers, 13- hot-blast pipe lines, 14- burner hearths.
Embodiment
One embodiment of the present utility model is further described below in conjunction with the accompanying drawings：
The continual and steady coal feeder in stokehold of the present utility model, mainly by coal bunker buffering cone 1, crank scraper 2, motor
3rd, chassis 4, middle Level control storehouse 5, lubricating oil supplies 6, level-sensing device 7, Gravimetric Coal Feeders 8, pneumatic lock gate hatch 9, circle
Type metal expansion joint 10, distinguished and admirable compensator 11, heating interlayer 12 and hot-blast pipe line 13；Described is in back taper to coal bunker buffering cone 1,
It is located at bucket shape and gives coal bunker people bottom, 1 bottom of coal bunker buffering cone is provided with chassis 4, the bottom of chassis 4 is provided with middle Level control storehouse
5, middle Level control storehouse 5 one is can be with co- controlling coal-supplying amount with level-sensing device 7, and two be that middle control storehouse 5 is deposited and is provided with after coal
Sealing function, can prevent following burner hearth heat smoke and feeder sealing air anti-channeling to top coal bunker, to prevent coal dust of coal feeding machine
Particle runs out of pollution environment.The chassis 4 is provided with the crank scraper in the middle Level control storehouse 5 of coal charge scraping delivery to bottom
2, crank scraper 2 is driven by being located at the motor 3 immediately below chassis 4, and the shell on the crank scraper 2 and chassis 4 is bumps
The bottom of the shell of chassis 4 is goed deep into groove fastening structure, the front portion of crank scraper 2, can prevent scraper from operationally deforming.The chassis 4
For the frustum cone structure of coal bunker bottom, the dischargeable capacity of coal bunker can be improved, the ratio of raw coal bucket upper and lower opening size, equal coal is reduced
Under the height of storehouse, dischargeable capacity is greatly increased；Under equal coal bunker volume, coal bunker layer building height can be reduced, building cost is saved.
Described lubricating oil supplies 6 are located between chassis 4 and motor 3；Described level-sensing device 7 inserts middle Level control storehouse
In 5；The bottom in described middle Level control storehouse 5 is provided with Gravimetric Coal Feeders 8, and the discharge outlet of Gravimetric Coal Feeders 8 is connected with discharging
Standpipe, the discharging standpipe of the Gravimetric Coal Feeders 8 is cylindrical stainless steel wear-resistant pipe.The bottom of discharging standpipe, which is connected with, leads to connection
The charging inclined tube of the entrance of burner hearth 14, described charging inclined tube is provided with the heating interlayer 12 through Hot-blast Heating, and charging inclined tube is with adding
Set between hot interlayer 12 facilitate work-up and block clearing operation disc type flexible sealing maintenance door.The Gravimetric Coal Feeders 8 go out
Pneumatic lock gate hatch 9 and circular metal expansion joint 10 are sequentially provided with expects pipe road, because boiler can be produced downwards in shutdown process
Or upward expansion, by circular metal expansion joint come supplement boiler swell increment, the thermal stretching of pipeline is compensated, so as to reduce tube wall
Stress, while being conducive to being heated when passing through quickly through, coal from heating interlayer 12 for coal charge, it is ensured that enter the coal of burner hearth
Temperature, reduce coal water content, it is to avoid bonded at coal spout, the efficiency of burner hearth can be improved by reducing the temperature difference of coal and burner hearth.
After Gravimetric Coal Feeders 8 of the coal charge via the middle bottom of Level control storehouse 5, passed downwardly through successively along the discharging standpipe of coal machine 8 pneumatic
Lock gate hatch 9, circular metal expansion joint 10 and pan feeding inclined tube enter burner hearth 14；The discharging of the described lower section of circular metal expansion joint 10
Standpipe is provided with the bypass line being connected with hot-blast pipe line 13, and bypass line is provided with 1-3 distinguished and admirable compensators 11, described wind
Flow compensator 11 to constitute for multiple circular metal expansion joints, the displacement that coal spread wind pipeline where compensation is produced with burner hearth, because this
Place's pipeline thermal expansion amount is needed to detect or be connected into monitoring system, and the premise of hot displacement can be being compensated by distinguished and admirable compensator 11
Under, reduce the trunking loss of coal spread wind.The front end of the hot-blast pipe line 13 is connected with the entrance of burner hearth 14, and hot blast is through hot-blast pipe line
13 enter burner hearth 14.
Claims (6)
1. a kind of continual and steady coal feeder in stokehold, it is characterised in that：It, which includes buffering to coal bunker, bores（1）, crank scraper（2）,
Motor（3）, chassis（4）, middle Level control storehouse（5）, lubricating oil supplies（6）, level-sensing device（7）, Gravimetric Coal Feeders
（8）, pneumatic lock gate hatch（9）, circular metal expansion joint（10）, distinguished and admirable compensator（11）, heating interlayer（12）And hot-blast pipe line
（13）；Described being buffered to coal bunker is bored（1）In back taper, it is located at bucket shape and gives coal bunker people bottom, buffers and bore to coal bunker（1）Bottom is set
It is equipped with chassis（4）, chassis（4）Bottom is provided with middle Level control storehouse（5）, chassis（4）It is provided with coal charge scraping delivery to bottom
Middle Level control storehouse（5）Interior crank scraper（2）, crank scraper（2）By being located at chassis（4）The motor of underface（3）
Driving, described lubricating oil supplies（6）Positioned at chassis（4）With motor（3）Between；Described level-sensing device（7）Insertion
Middle Level control storehouse（5）It is interior；Described middle Level control storehouse（5）Bottom be provided with Gravimetric Coal Feeders（8）, Gravimetric Coal Feeders
（8）Discharge outlet be connected with discharging standpipe, the bottom of discharging standpipe, which is connected with, leads to connection burner hearth（14）The charging inclined tube of entrance, institute
State Gravimetric Coal Feeders（8）Discharging pipeline on be sequentially provided with pneumatic lock gate hatch（9）With circular metal expansion joint（10）, coal charge via
Middle Level control storehouse（5）The Gravimetric Coal Feeders of bottom（8）Afterwards, along coal machine（8）Discharging standpipe pass downwardly through pneumatic brake successively
Plate door（9）, circular metal expansion joint（10）Enter burner hearth with pan feeding inclined tube（14）；Described circular metal expansion joint（10）Lower section
Discharging standpipe be provided with and hot-blast pipe line（13）Connected bypass line, bypass line is provided with distinguished and admirable compensator（11）, institute
State hot-blast pipe line（13）Front end and burner hearth（14）Entrance be connected, hot blast is through hot-blast pipe line（13）Into burner hearth（14）.
2. the continual and steady coal feeder in a kind of stokehold according to claim 1, it is characterised in that：The crank scraper（2）
With chassis（4）Shell be tongue and groove fastening structure, crank scraper（2）Chassis is goed deep into front portion（4）The bottom of shell.
3. the continual and steady coal feeder in a kind of stokehold according to claim 1, it is characterised in that：Described distinguished and admirable compensator
（11）For 1-3.
4. the continual and steady coal feeder in a kind of stokehold according to claim 1, it is characterised in that：The Gravimetric Coal Feeders
（8）Discharging standpipe be cylindrical stainless steel wear-resistant pipe.
5. the continual and steady coal feeder in a kind of stokehold according to claim 1, it is characterised in that：On described charging inclined tube
Provided with the heating interlayer through Hot-blast Heating（12）.
6. the continual and steady coal feeder in a kind of stokehold according to claim 1 or 5, it is characterised in that：Described charging is oblique
Pipe and heating interlayer（12）Between set facilitate work-up and block clearing operation disc type flexible sealing maintenance door.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621262647.2U CN206488272U (en) | 2016-11-22 | 2016-11-22 | A kind of continual and steady coal feeder in stokehold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621262647.2U CN206488272U (en) | 2016-11-22 | 2016-11-22 | A kind of continual and steady coal feeder in stokehold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206488272U true CN206488272U (en) | 2017-09-12 |
Family
ID=59768483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621262647.2U Expired - Fee Related CN206488272U (en) | 2016-11-22 | 2016-11-22 | A kind of continual and steady coal feeder in stokehold |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206488272U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108085068A (en) * | 2018-01-24 | 2018-05-29 | 山西潞安煤基清洁能源有限责任公司 | A kind of mixture coal method and device suitable for coal gasification apparatus |
| CN113776616A (en) * | 2021-09-23 | 2021-12-10 | 华能伊春热电有限公司 | Method for improving capacity of raw coal hopper |
| CN114560230A (en) * | 2022-01-25 | 2022-05-31 | 华能国际电力股份有限公司上安电厂 | Secondary coal feeding device suitable for narrow space |
-
2016
- 2016-11-22 CN CN201621262647.2U patent/CN206488272U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108085068A (en) * | 2018-01-24 | 2018-05-29 | 山西潞安煤基清洁能源有限责任公司 | A kind of mixture coal method and device suitable for coal gasification apparatus |
| CN113776616A (en) * | 2021-09-23 | 2021-12-10 | 华能伊春热电有限公司 | Method for improving capacity of raw coal hopper |
| CN114560230A (en) * | 2022-01-25 | 2022-05-31 | 华能国际电力股份有限公司上安电厂 | Secondary coal feeding device suitable for narrow space |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170912 Termination date: 20181122 |
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| CF01 | Termination of patent right due to non-payment of annual fee |