CN2398510Y - Coaling ejector for fluidized furnace - Google Patents
Coaling ejector for fluidized furnace Download PDFInfo
- Publication number
- CN2398510Y CN2398510Y CN 99255763 CN99255763U CN2398510Y CN 2398510 Y CN2398510 Y CN 2398510Y CN 99255763 CN99255763 CN 99255763 CN 99255763 U CN99255763 U CN 99255763U CN 2398510 Y CN2398510 Y CN 2398510Y
- Authority
- CN
- China
- Prior art keywords
- coal
- pipe
- fluidized
- air
- air 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 - Fee Related
Links
Landscapes
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
The utility model relates to a coaling ejector for fluidized-bed boilers. The utility model is provided with an air flow contracted section. The center of the air flow contracted section is provided with a coaling pipe. The upper part of the air flow contracted section is provided with an air inlet pipe, and the lower part of the air flow contracted section is provided with a spray pipe. The lower part of the spray pipe is provided with a diffusion pipe. The air flow enters the air flow contracted section, forms high-speed circular injection air on the throat part of the spray pipe, and simultaneously carries with the coal on the exit part of the coaling pipe to enter the diffusion pipe. The coal easily enters the fluidized-bed boiler. The utility model has the advantages that the structure is simple, the installation and the operation are convenient, the injection effect of the coal is good, and the normal operation of the fluidized-bed boiler is guaranteed.
Description
The utility model relates to coal feeder of boiler, relates in particular to a kind of fluidized-bed combustion boiler feeder.
It is wide that fluidized-bed combustion boiler has coal adaptability, and advantages such as desulfurization, low NOx are arranged.But under the fluid bed boiler furnace barotropic condition, the burner hearth hot blast often blows out the coal that adds from belt feeder from the coal dropping port back, causes the boiler coal cisco unity malfunction that breaks.The at present domestic wind that returns that also has the way that adopts airflow injection to deliver coal to suppress burner hearth.But owing to do not set up a stronger negative pressuren zone at the coal mouthful place that falls, so be subjected to the influence of furnace pressure fluctuation easily.
The purpose of this utility model is the problems referred to above that exist at present CFBB coal, and a kind of simple structure, easy for installation, practical and reliable fluidized-bed combustion boiler coal injector are provided, and guarantees the continuous coal supply of belt feeder to fluidized-bed combustion boiler.
The technical solution of the utility model is: fluidized-bed combustion boiler coal injector comprises: air-flow contraction section, coal feeding pipe, jet pipe and diffuser pipe.Top at the air-flow contraction section is provided with air inlet pipe, is provided with coal feeding pipe at the center of air-flow contraction section; The coal feeding pipe bottom has formed an annular spray mouth with nozzle throat.The annular spray mouth place high velocity jet that air-flow is formed with nozzle throat in the coal feeding pipe bottom behind contraction section goes out, and forms a stronger negative pressuren zone.Under the ejector action of injection air, guaranteed that the coal that belt coal-feeding machine adds can successfully enter in the boiler.In the bottom of annular spray mouth is diffuser pipe, and the effect of diffuser pipe is a principle of utilizing injection air deceleration supercharging, sets up a stronger static pressure distribution district in the exit of diffuser pipe, is used for overcoming when malleation is higher in the stove back string wind to the influence of feeder.
The utlity model has simple structure, install, easy to operate, characteristics such as injection is effective; When the incoming-flow pressure of injection air-flow is 1300 millimeters of water,, all can guarantee the continuous coal supply of boiler as long as furnace pressure is no more than 200 millimeters of water.
The utility model is described in further detail below in conjunction with accompanying drawing.
Accompanying drawing is the assembly drawing of fluidized-bed combustion boiler coal injector.
Fluidized-bed combustion boiler of the present utility model coal injector comprises air-flow contraction section 2, coal feeding pipe 1, jet pipe 3 and diffuser pipe 4.Be provided with air inlet pipe 5 on the top of air-flow contraction section 2; Be provided with coal feeding pipe 1 in the centre of air-flow contraction section 2, coal adds from the coal feeding pipe top.Coal feeding pipe 1 bottom and jet pipe 3 throats form annular spray mouth 6, the air-flow that is blown into from air inlet pipe 5 behind air-flow contraction section 2, from annular spray mouth 6 ejection at a high speed, the coal of coal feeding pipe bottom then by the high velocity air injection in following diffuser pipe 4.
In the such scheme, the circumferential weld gap size of the annular spray mouth 6 that coal feeding pipe 1 bottom and jet pipe 3 throats form should be controlled in the 6-9 millimeter scope according to boiler coal amount size.And the gap of circumferential weld is uniformity substantially, and preferably error is in ± 0.5 millimeter scope.Complete equipment can all be made of general steel plate.
Claims (3)
1, a kind of fluidized-bed combustion boiler coal injector is characterized in that it comprises: air-flow contraction section, coal feeding pipe, jet pipe and diffuser pipe; Top at the air-flow contraction section is provided with air inlet pipe; Center at the air-flow contraction section is provided with coal feeding pipe; The coal feeding pipe bottom has formed an annular spray mouth with nozzle throat.
2, fluidized-bed combustion boiler according to claim 1 coal injector is characterized in that the circumferential weld gap size of the annular spray mouth that coal feeding pipe and jet pipe are formed should be controlled in the 6-9 millimeter scope according to boiler coal amount size.
3, fluidized-bed combustion boiler according to claim 1 and 2 coal injector, the circumferential weld gap that it is characterized in that the annular spray mouth that coal feeding pipe and jet pipe are formed is uniformity substantially.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99255763 CN2398510Y (en) | 1999-12-07 | 1999-12-07 | Coaling ejector for fluidized furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99255763 CN2398510Y (en) | 1999-12-07 | 1999-12-07 | Coaling ejector for fluidized furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2398510Y true CN2398510Y (en) | 2000-09-27 |
Family
ID=34039056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99255763 Expired - Fee Related CN2398510Y (en) | 1999-12-07 | 1999-12-07 | Coaling ejector for fluidized furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2398510Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102607021A (en) * | 2012-03-09 | 2012-07-25 | 中国神华能源股份有限公司 | Coal feeder, coal feeding system and circulating fluidized bed boiler |
-
1999
- 1999-12-07 CN CN 99255763 patent/CN2398510Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102607021A (en) * | 2012-03-09 | 2012-07-25 | 中国神华能源股份有限公司 | Coal feeder, coal feeding system and circulating fluidized bed boiler |
| CN102607021B (en) * | 2012-03-09 | 2014-09-17 | 中国神华能源股份有限公司 | Coal feeder, coal feeding system and circulating fluidized bed boiler |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202056861U (en) | Biomass particle combustor | |
| CN204554801U (en) | Circulating fluid bed boiler secondary air hierarchical arrangement system | |
| CN201344535Y (en) | Multi-nozzle, high-flow and fully-upper-inlet-air embedded household gas stove burner | |
| CN2398510Y (en) | Coaling ejector for fluidized furnace | |
| CN201343523Y (en) | Multi-wind-distribution fixed bed biomass gasification furnace | |
| CN200949812Y (en) | Environment-protective energy-saved stream boiler | |
| CN201396761Y (en) | Gas and air nozzle double-row staggered arranged external premixed burner in pre-combustion chamber | |
| CN108397767B (en) | Low-bed-pressure low-air-volume combustion operation method for circulating fluidized bed boiler | |
| CN206919000U (en) | A kind of differential fluidized-bed boiler system | |
| CN207514901U (en) | A kind of boiler revert system | |
| CN201007484Y (en) | Ceramic combustor with ring shaped nozzle disposed vertically and upwardly | |
| CN211372393U (en) | Arrangement structure for adjusting circulating material quantity | |
| CN216667660U (en) | Coal feeding air structure | |
| CN209816043U (en) | Fluidized bed gasification furnace capable of improving coal gasification efficiency | |
| CN209909893U (en) | Smoke-air flow field pressure and power balance regulating and controlling system of double fluidized bed boiler | |
| CN220229127U (en) | Novel energy-saving spray tower hot-blast furnace | |
| CN207471566U (en) | Biomass combustion boiler nozzle and ashes cooling system | |
| CN217329772U (en) | Air distribution device of fluidized bed boiler with forced slag discharge pipe | |
| CN2279363Y (en) | Swirl preheating spray gun for blowing coal dust of blast furnace | |
| CN202328224U (en) | Self-adaptive air-distribution combustion device for instantaneous gasification of liquid fuel | |
| CN206572516U (en) | Biological fuel gas low nitrogen burning mouth | |
| CN205919312U (en) | A whirlwind supplemental oxygen system of living beings granule burning aircraft nose | |
| CN101319780A (en) | Sorting type slag cooler | |
| CN208186373U (en) | A kind of disturbance device of circulating fluidized bed boiler | |
| CN213955291U (en) | Biomass solid fuel combustion furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |