CN202041241U - Solid powder flow monitoring device - Google Patents
Solid powder flow monitoring device Download PDFInfo
- Publication number
- CN202041241U CN202041241U CN2011200581069U CN201120058106U CN202041241U CN 202041241 U CN202041241 U CN 202041241U CN 2011200581069 U CN2011200581069 U CN 2011200581069U CN 201120058106 U CN201120058106 U CN 201120058106U CN 202041241 U CN202041241 U CN 202041241U
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- China
- Prior art keywords
- ash
- monitoring device
- solid powder
- flow monitoring
- powder flow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- 239000000843 powder Substances 0.000 title claims abstract description 34
- 239000007787 solid Substances 0.000 title claims abstract description 19
- 238000012806 monitoring device Methods 0.000 title claims abstract description 14
- 230000005484 gravity Effects 0.000 claims description 13
- 238000005259 measurement Methods 0.000 claims description 6
- 238000007689 inspection Methods 0.000 claims description 3
- 239000002956 ash Substances 0.000 abstract description 32
- 238000012544 monitoring process Methods 0.000 abstract description 9
- 239000003245 coal Substances 0.000 abstract description 6
- 239000000463 material Substances 0.000 abstract description 5
- 239000010883 coal ash Substances 0.000 abstract 2
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 230000007547 defect Effects 0.000 abstract 1
- 239000010881 fly ash Substances 0.000 description 21
- 239000012717 electrostatic precipitator Substances 0.000 description 6
- 238000007789 sealing Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000005243 fluidization Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Landscapes
- Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
Abstract
The utility model relates to a solid powder flow monitoring device used in fire coal power plants. The coal ashes generated from the boiler of a fire coal power plant have to be transported to ash storage warehouse as standby. Currently, a positive-pressure dense-phase pneumatic ash conveying system is adopted by most fire coal power plants for transporting coal ashes generated by boilers, which, proved by practices, has many defects. Particularly, when the quality of the fire coal deteriorates and the ash-carrying distribution of the flue inside the deduster differs a lot, the ash conveying system is far from meeting requirement. Conveying obstruction and high-material-level alarm of the ash storage bucket under the electrostatic deduster frequently occur, thereby forcing the fire coal power plants to reduce load operation or discharge ash on the spot from the ash storage bucket, which severely pollutes the environment. The utility model employs a solid powder flow monitoring device, gives up the discontinuous conveying mode of the cabin pump ash storage, and replaces the discontinuous positive-pressure dense-phase pneumatic ash conveying system with a digital continuous ash conveying system capable of monitoring ash-conveying quantity and ash-gas ratio, thereby thoroughly reversing the passive situation that the high-material-level alarm of the ash storage bucket frequently occurs and load operation is forced to be decreased.
Description
Technical field
A kind of solid powder flow monitoring device relates to the monitoring technology of the solid powder flow of coal-burning power plant.
Background technology
The solid powder of coal-burning power plant, mainly be meant the flyash that produces after coal dust that boiler uses and the boiler combustion, so far the device that does not still have monitoring solid powder flow, therefore, the safety and economy operation of storage formula powder process and combustion system and boiler pneumatic ash removal system during the coal-burning power plant just is difficult to guarantee, especially the Pneumatic ash conveying system of boiler, China builds the high capacity unit, boiler ash discharge amount is big, the flue gas dust-carrying capacity deviation of coal-fired in addition ature of coal variation and each road flue is big, often causing fly-ash separator storage ash bucket high charge level to occur reports to the police, power plant is forced to reduce the unit generation load, to sacrifice economy is the safe operation that cost is guaranteed the coal-burning power plant, this passive situation developed into leave no choice but to solve can not stage.For this reason, the appearance of solid powder flow monitoring device, can monitor the gravity flow of conveying solid powder and the grey gas ratio of boiler Pneumatic ash conveying system in real time, solid powder flow monitoring device can thoroughly change the passive situation of coal-burning power plant aspect safety and economy.
Summary of the invention
The purpose of research and development solid powder flow monitoring device, mainly be the serious problems that exist at boiler Pneumatic ash conveying system, current coal-burning power plant generally adopts the storehouse pump to store up grey discontinuous ash-transmission system, adopts solid powder flow monitoring technology, can overcome some drawbacks of discontinuous induction system.After defeated grey transmission system changes, not only can save the pressurized air of multiple annexes such as program control pneumatic charging and discharging valve, storehouse pump, fluidisation blower fan, pneumatic breather valve, safety valve and the required use of pneumatic instrument and topworks, avoid the issuable fault of various annexes also to reduce the heat dissipation capacity of flyash, keep carrying flyash that higher temperature is arranged, the flyash viscosity is low, the good fluidity of ash is carried more unobstructed.
The present invention solves the technical scheme that is adopted that has problems in the ash transfer: coal-burning power plant's electrostatic precipitator is the negative pressure operation, and malleation concentrated phase Pneumatic ash conveying is an operation under positive pressure, need in the conveying two different pressure zones are kept apart, to ensure the safe operation of electrostatic precipitator.The way that original malleation concentrated phase pneumatic ash removal system is isolated two different pressures districts is between electrostatic precipitator storage ash bucket and storehouse pump the pneumatic inlet valve of programmed switch to be set to separate two different pressures districts, control charging and discharge make induction system become discontinuous ground and carry flyash.The present invention adopts the defeated ash amount of solid powder flow monitoring device monitoring, the flyash that will store up in the ash bucket according to the jet pipe aspirator is drawn into ash conveying pipe according to its deadweight, and powder can be carried continuously, the defeated ash amount of monitoring simultaneously, and can control grey gas ratio, make defeated ash be in stable concentrated phase and carry.The principle of work of finishing above function is on the round box (2) that has inspection door (13) ash tube (1) to be installed, the measurement plate (3) that links to each other with door bar axle (4) is equipped with in its lower end, end by sectional wheel piece connecting link (6) with door bar axle (4) but the end coaxial rotation that is fixed together, the other end of sectional wheel piece connecting link is connected with sectional wheel piece (7), on the wheel rim of sectional wheel piece, twine a seizing wire (8), it is serial connection equilibrate counterweight (9) down, extension spring (10) and tensile force type sensor (11), seizing wire can be passed to extension spring and tensile force type sensor with acting on the powder gravity of measuring on the plate, make extension spring generation stretcher strain, acting force is passed to tensile force type sensor (11), sensor produces and the proportional 4-20mA standard analog magnitude of current of acting force according to stressed size, export to the scattered control system DCS of powerplant control room by shielded cable, can correspondingly demonstrate the instantaneous gravity flow of powder.
Before solid powder flow monitoring device comes into operation,, make and measure plate and be in closed condition, and maintain pretightning force with sealing powder post gravity by adjustment to equilibrate counterweight (9).When putting into operation, there is flyash to fall and measures on the plate, as long as its acting force equals sealing powder post gravity, to measure plate and just be in closed condition, the dynamic seal (packing) powder steric hindrance that will maintain certain altitude in the powder sinking tube is ended the pressurized air channelling that makes progress.When flyash continues to fall to surpassing sealing powder position height, the equilibrium state that this part flyash gravity can be broken both sides presses off the measurement plate, this part powder amount is output, the aperture of the big measurement plate of flow is big, the aperture of the little measurement plate of flow is little, but dynamic seal (packing) powder post always is present in the material blanking tube, stops pressurized air to enter the effect that electrostatic precipitator plays lock gas.
Beneficial effect of the present invention
Carry flyash continuouslyly and unobstructedly, can reduce the radiation loss of flyash, make flyash maintain higher temperature, the good fluidity of the low flyash of the viscosity of high temperature flyash, thereby can blockage phenomenon.The defeated ash load of original ash-transmission system discontinuity is big, causes electrostatic precipitator storage ash bucket to overstock flyash easily material level is raise, and forces until high charge level and promptly puts ash.And improved continuity is carried, and has disperseed concentrated load, and transporting resistance is little, thereby the overstocked phenomenon of flyash can not take place.Even if the increase at double of quality decline dust burdening, defeated grey ability also can satisfy, and the storage ash bucket can not produce high charge level and promptly put grey phenomenon, makes the coal-burning power plant thoroughly break away from passive situation.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples.
The accompanying drawing of solid powder flow monitoring device is a structural map of the present invention, and wherein Fig. 1 is a front elevation; Fig. 2 is a vertical view; Fig. 3 is A to view:
1. ash tube 2. round box 3. are measured entad adjustable bearing split bearing 6. sectional wheel piece connecting links 7. sectional wheel pieces 8. seizing wires 9. equilibrate counterweights 10. extension springs 11. tensile force type sensors 12. supports 13. inspection doors of 4. bar axles 5. of plate, 14. case, 15. sealing shroud, above parts have constituted solid powder flow monitoring device.
Embodiment
When flyash is fallen on the measurement plate (3) through material blanking tube (1), the gravity opposite house bar axle (4) of the flyash moment that rotates is delivered to extension spring (10) and produces stretcher strain, its pulling force balances each other with the moment of measuring the generation of plate side powder post, the arm of force equal in length of both sides is set, and the pulling force that its extension spring tension distortion produces tensile force type sensor (11) just equals to measure the gravity that plate is subjected to generation under the flyash action of gravity.Realize that monitoring carries the monitoring of powder gravity flow, this device can stop on the air-flow scurries, and ensures the safe operation of electrostatic precipitator, but on-line real time monitoring is carried the instantaneous gravity flow of flyash again.
Claims (1)
1. solid powder flow monitoring device, the feature of described solid powder flow monitoring device is: have on the round box (2) of inspection door (13) ash tube (1) is installed, the measurement plate (3) that is connected with door bar axle (4) is equipped with in its lower end, end by sectional wheel piece connecting link (6) with door bar axle (4) but the end coaxial rotation that is fixed together, the other end of sectional wheel piece connecting link is connected with sectional wheel piece (7), on the wheel rim of sectional wheel piece, twine a seizing wire (8), be connected in series extension spring (10) and tensile force type sensor (11) under it, seizing wire can be passed to extension spring and tensile force type sensor with acting on the powder gravity of measuring on the plate, make extension spring generation stretcher strain, acting force is passed to tensile force type sensor (11), sensor produces and the proportional 4-20mA standard analog magnitude of current of acting force according to stressed size, export to the scattered control system DCS of powerplant control room by shielded cable, can correspondingly demonstrate the instantaneous gravity flow of powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200581069U CN202041241U (en) | 2011-03-08 | 2011-03-08 | Solid powder flow monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200581069U CN202041241U (en) | 2011-03-08 | 2011-03-08 | Solid powder flow monitoring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202041241U true CN202041241U (en) | 2011-11-16 |
Family
ID=44968679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200581069U Expired - Lifetime CN202041241U (en) | 2011-03-08 | 2011-03-08 | Solid powder flow monitoring device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202041241U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102778322A (en) * | 2012-07-12 | 2012-11-14 | 中国矿业大学 | Device and method for measuring stress of coal particle in concentrated phase gas-solid fluidized bed |
| CN109900405A (en) * | 2019-03-14 | 2019-06-18 | 胡琴 | A kind of pressure prompting four-way union |
| CN110354980A (en) * | 2019-08-20 | 2019-10-22 | 中粮工程装备（张家口）有限公司 | A kind of flour mill feeding altitude measurement system |
| CN112461311A (en) * | 2020-10-23 | 2021-03-09 | 智远物联技术金湖有限公司 | Novel multi-functional mass flow device |
-
2011
- 2011-03-08 CN CN2011200581069U patent/CN202041241U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102778322A (en) * | 2012-07-12 | 2012-11-14 | 中国矿业大学 | Device and method for measuring stress of coal particle in concentrated phase gas-solid fluidized bed |
| CN102778322B (en) * | 2012-07-12 | 2014-04-16 | 中国矿业大学 | Device and method for measuring stress of coal particle in concentrated phase gas-solid fluidized bed |
| CN109900405A (en) * | 2019-03-14 | 2019-06-18 | 胡琴 | A kind of pressure prompting four-way union |
| CN109900405B (en) * | 2019-03-14 | 2020-12-11 | 阜阳知麓信息科技有限公司 | Pressure reminding four-way pipe joint |
| CN110354980A (en) * | 2019-08-20 | 2019-10-22 | 中粮工程装备（张家口）有限公司 | A kind of flour mill feeding altitude measurement system |
| CN112461311A (en) * | 2020-10-23 | 2021-03-09 | 智远物联技术金湖有限公司 | Novel multi-functional mass flow device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: BEIJING HUATAI MEIJING TECHNOLOGY DEVELOPMENT CO., Free format text: FORMER OWNER: SUN JIADING Effective date: 20120924 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20120924 Address after: Beijing City, Chaoyang District Qingnian Road 100025, No. 2 Building No. 11 hospital business 01 3 storey 315 Patentee after: Beijing Huatai Vision Technology Development Co., Ltd. Address before: 100025 Beijing city Chaoyang District Ciyunsi Ocean International Center, A block 21 layer 2109 Patentee before: Sun Jiading |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111116 |
|
| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: Beijing Huatai Meijing Technology Development Co.,Ltd. The person in charge Document name: Notice of termination of patent right |