CN205065706U - A tubular injector set that is used for fluidized bed boiler coal supply mouth - Google Patents
A tubular injector set that is used for fluidized bed boiler coal supply mouth Download PDFInfo
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- CN205065706U CN205065706U CN201520706345.9U CN201520706345U CN205065706U CN 205065706 U CN205065706 U CN 205065706U CN 201520706345 U CN201520706345 U CN 201520706345U CN 205065706 U CN205065706 U CN 205065706U
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- coal
- tubular
- tube nozzle
- spread wind
- arc
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Abstract
The utility model discloses a tubular injector set that is used for fluidized bed boiler coal supply mouth, it includes the coal supply pipeline, broadcasts the coal tuber pipe, coal wind gap, tubular nozzle are broadcast to brickwork, coal supply mouth, arc, broadcast the coal bellows, the bed of material, tubular injector set, characterized by: set up the tubular nozzle below the coal supply mouth, 9 tubular nozzle tubular injector sets, tubular injector set are the arc form, and the tubular injector set embeds in broadcasting the coal bellows, and the volume of broadcasting the coal bellows is 8 times former of broadcasting the coal tuber pipe. Broadcast the coal wind gap at the former arc of current fluidized bed boiler coal supply mouth below and set up the tubular nozzle, the long 300mm of tubular nozzle, diameter 32mm, wall thickness 5mm, the material adopts heat -resisting wear resistant steel 1Cr20Ni14Si2. The tubular injector set forms the strong arc efflux of one will go into the stove coal and blow and let go in circular coal supply mouth below, prevent that a large amount of income stove coal pile from amassing in being close to the bed of material of brickwork, prevents further that the water -cooling wall from receiving the lime -ash abrasion of high concentration.
Description
Technical field
The utility model relates to CFBB, especially relates to a kind of tube nozzle group for fluidized-bed combustion boiler coal feeding hole.
Background technology
China uses in power plant the country that CFBB (CFB boiler) is maximum in the world, the large and small cycles fluid bed station boiler run has 3000 multiple stage, wherein the large-size circulating fluidized bed station boiler of more than 410t/h has 300 multiple stage, and the large-size circulating fluidized bed station boiler of more than 1025t/h has 100 multiple stage (also having 100 multiple stage to build).
Circulating fluidized bed boiler of power station burner hearth is as same cuboid, and four sides furnace wall is arranged by water screen tube and band steel is welded, and " water-cooling wall " just becomes the synonym of " furnace wall ".Coal feeding hole is generally opened at lower furnace portion (bottom bed about 1.6 meters), and then coal-fired being entered in the bed material of lower furnace portion by coal supply pipeline burnt.The angle of coal supply pipeline and horizontal direction is generally at about 60 °; angle steep like this make coal-fired concentrate to drop in bed material and form stack be unfavorable for conflagration; also cause the lime-ash skewness in flue gas after burning; lime-ash after burning receives inner flue gas of the stove pressure thus the furnace wall (water-cooling wall) at deflection coal feeding hole place; this side wall is caused to be subject to the lime-ash erosive wear of high concentration further; there will be wear and leakage then maintenance down time serious, have a strong impact on normal production.
Existing Coal Feeding in Circulating Fluidized Bed Furnace pipeline and the purging wind of coal feeding hole and coal spread wind effect all very poor, the phenomenon that coal is deposited in the bed of material often occurs, and it is too weak that reason is that coal spread wind does not have air compartment and nozzle to show as intensity.Now conventional way forms an arc air port to strengthen purging but effect is bad at coal feeding hole.Coal spread wind is broadcast coal effect cause the thick coal gangue particle Fire and abrasion resistant material clashed into for a long time in coal feeding hole stove to make it come off because it is not had, after Fire and abrasion resistant material comes off, water-cooling wall is just out exposed, exposed water screen tube is shortly revealed by coal gangue particle brinelling, must shutdown maintenance after leakage.
So, be necessary to design a kind of nozzle below coal feeding hole, to form one stronger arc jet as-fired coal is blown let go, in the bed of material preventing a large amount of as-fired coal to be deposited near furnace wall, prevent the skewness thus prevent water-cooling wall to be subject to the lime-ash erosive wear of high concentration in flue gas of the lime-ash after coal combustion further.
Summary of the invention
The utility model object is to provide a kind of tube nozzle group for fluidized-bed combustion boiler coal feeding hole.
For achieving the above object, the utility model takes following technical proposals:
A kind of tube nozzle group for fluidized-bed combustion boiler coal feeding hole described in the utility model, its Bao Kuo Give coal pipeline, former coal spread wind pipe, furnace wall, coal feeding hole, former arc coal spread wind mouth, tube nozzle, coal spread wind case, the bed of material, tube nozzle group, it is characterized in that: below coal feeding hole, tube nozzle is set, 9 tube nozzle composition tube nozzle groups, the curved shape of tube nozzle group, tube nozzle group is built in coal spread wind case, and the volume of coal spread wind case is 8 times of former coal spread wind pipe.
A kind of tube nozzle group technique feature for fluidized-bed combustion boiler coal feeding hole described in the utility model has:
1, former for existing fluidized-bed combustion boiler coal spread wind pipe volume expansion is become coal spread wind case, the volume of coal spread wind case is 8 times of the volume of former coal spread wind pipe.The coal spread wind of high flow rate flowing velocity in the coal spread wind case that volume is larger of the wind comes from can diminish, and the static pressure of coal spread wind can become large, and the pressure differential of such tube nozzle both sides can become large thus gas jet can strengthen.
2, the former arc coal spread wind mouth below existing fluidized-bed combustion boiler coal feeding hole arranges tube nozzle, transforms, become wide arc air port to former arc coal spread wind mouth both sides.The long 300mm of tube nozzle, diameter 32mm, wall thickness 5mm, material adopts heat-resistance and wear-resistance steel 1Cr20Ni14Si2.
3,9 tube nozzles form tube nozzle group.
4, the curved shape of tube nozzle group, tube nozzle group forms one stronger arc jet and is blown by as-fired coal and let go, in the bed of material preventing a large amount of as-fired coal to be deposited near furnace wall below circular coal feeding hole.
5, tube nozzle group is built in coal spread wind case.
Accompanying drawing explanation
Fig. 1 is existing Liuization bed Guo Lu Give coal pipeline and former coal spread wind pipe diagram.
Fig. 2 is existing Liuization bed Guo Lu Give coal mouth and coal spread wind mouth diagram.
The tube nozzle of the utility model fluidized-bed combustion boiler coal feeding hole that Fig. 3 is and coal spread wind case diagram.
The tube nozzle group diagram of the utility model fluidized-bed combustion boiler coal feeding hole that Fig. 4 is.
Detailed description of the invention
As shown in Figure 1, Figure 2, Figure 3, Figure 4, a kind of tube nozzle group for fluidized-bed combustion boiler coal feeding hole described in the utility model, its Bao Kuo Give coal pipeline 1, former coal spread wind pipe 2, furnace wall 3, coal feeding hole 4, former arc coal spread wind mouth 5, tube nozzle 6, coal spread wind case 7, the bed of material 8, tube nozzle group 9.
Former for existing fluidized-bed combustion boiler coal spread wind pipe 2 volume expansion is become coal spread wind case 7, and the volume of coal spread wind case 7 is 8 times of the volume of coal spread wind pipe 2.
Below existing fluidized-bed combustion boiler coal feeding hole 4, arrange tube nozzle 6,9 tube nozzles 6 form tube nozzle group 9, the curved shape of tube nozzle group 9, and tube nozzle group 9 is built in 7 li, coal spread wind case.Former arc coal spread wind mouth 5 below existing fluidized-bed combustion boiler coal feeding hole 4 arranges tube nozzle, transforms, become wide arc air port to former arc coal spread wind mouth 5 both sides.
The various embodiments described above can not depart from some changes in addition under scope of the present utility model, thus above explanation to comprise and the structure shown in accompanying drawing should be considered as exemplary, and be not used to limit claim of the present utility model.
Claims (3)
1. the tube nozzle group for fluidized-bed combustion boiler coal feeding hole, comprise coal supply pipeline (1), former coal spread wind pipe (2), furnace wall (3), coal feeding hole (4), former arc coal spread wind mouth (5), tube nozzle (6), coal spread wind case (7), the bed of material (8), tube nozzle group (9), it is characterized in that: the former arc coal spread wind mouth (5) of fluidized-bed combustion boiler coal feeding hole (4) below arranges tube nozzle (6).
2. a kind of tube nozzle group for fluidized-bed combustion boiler coal feeding hole according to claim 1, it is characterized in that, 9 tube nozzles (6) form tube nozzle group (9), tube nozzle group (9) curved shape, it is inner that tube nozzle group (9) is built in coal spread wind case (7).
3. a kind of tube nozzle group for fluidized-bed combustion boiler coal feeding hole according to claim 1, it is characterized in that, former arc coal spread wind mouth (5) both sides are transformed, become wide arc air port, after fluidized-bed combustion boiler former coal spread wind pipe (2) volume expansion 8 times, become coal spread wind case (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520706345.9U CN205065706U (en) | 2015-09-14 | 2015-09-14 | A tubular injector set that is used for fluidized bed boiler coal supply mouth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520706345.9U CN205065706U (en) | 2015-09-14 | 2015-09-14 | A tubular injector set that is used for fluidized bed boiler coal supply mouth |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205065706U true CN205065706U (en) | 2016-03-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520706345.9U Expired - Fee Related CN205065706U (en) | 2015-09-14 | 2015-09-14 | A tubular injector set that is used for fluidized bed boiler coal supply mouth |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205065706U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112325277A (en) * | 2020-12-16 | 2021-02-05 | 无锡华光环保能源集团股份有限公司 | Coal-spreading air arrangement structure for boiler spiral coal feeder |
-
2015
- 2015-09-14 CN CN201520706345.9U patent/CN205065706U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112325277A (en) * | 2020-12-16 | 2021-02-05 | 无锡华光环保能源集团股份有限公司 | Coal-spreading air arrangement structure for boiler spiral coal feeder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160302 Termination date: 20160914 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |