CN205299503U - Circulating fluidized bed boiler coal supply mouth structure - Google Patents
Circulating fluidized bed boiler coal supply mouth structure Download PDFInfo
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- CN205299503U CN205299503U CN201521112585.2U CN201521112585U CN205299503U CN 205299503 U CN205299503 U CN 205299503U CN 201521112585 U CN201521112585 U CN 201521112585U CN 205299503 U CN205299503 U CN 205299503U
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- coal feeding
- feeding hole
- steel plate
- fluidized bed
- seal box
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Abstract
The utility model discloses a circulating fluidized bed boiler coal supply mouth structure, including the furnace tube panel, but the wear -resisting plastics of furnace tube panel inner wall, and the seal box of furnace tube panel outer wall stretches into the coal supply mouth steel sheet in the seal box, packs the heat preservation pouring material in the seal box, its characterized in that: coal supply mouth steel sheet tip is located the seal box, and coal supply mouth steel sheet tip to the space between furnace tube panel entry to reaching coal supply mouth steel sheet and keeping warm between the pouring material, the shaping is the coal supply mouth by the packing of the wear -resisting pouring of corundum mullite material. The utility model provides a yielding, the problem that burns out and exchange wearing and tearing of steel sheet coal supply mouth, guarantee normal, continuous, the safe operation of boiler.
Description
Technical field
This utility model relates to the coal feeding hole structure of recirculating fluidized bed (CFB) boiler.
Background technology
In prior art, often there is gross distortion, warpage and wear problem in boiler coal feeding mouth, has a strong impact on the operation that boiler is normal, continuous, permanent. it have been investigated that, this is due in the coal feeding hole structure of recirculating fluidized bed (CFB) boiler, the coal feeding hole of prior art all adopts cast steel integral plate structure, owing to coal feeding hole distance burner hearth is close, when boiler is properly functioning, fire box temperature is high, generally reach about 850 DEG C, therefore coal feeding hole steel plate is subject to hyperthermia radiation and baking for a long time, add boiler owing to running reason, frequent start and stop, and the washing away of furnace high-temperature flue gas and low temperature coal spread wind, cause that coal feeding hole steel plate is subject to the stress influence parcel with peripheral wear-resistant castable that colds and heat succeed each other for a long time, cause coal feeding hole steel plate deformed warpage and burn out, simultaneously because temperature is high, steel plate materials decrease in strength, abrasive resistance is greatly reduced, also lead to coal feeding hole steel plate easy to wear, this phenomenon can have a strong impact on the properly functioning of boiler.
Utility model content
The purpose of this utility model is in that: propose a kind of Coal Feeding in Circulating Fluidized Bed Furnace mouth structure, solves that steel plate coal feeding hole is yielding, burns out and problem easy to wear, it is ensured that normal, continuous, the safe operation of boiler.
The purpose of this utility model is realized by following technical proposals:
A kind of Coal Feeding in Circulating Fluidized Bed Furnace mouth structure, including burner hearth tube panel, the corrosive-proof plastic material of burner hearth tube panel inwall, the seal box of burner hearth tube panel outer wall, stretches into the coal feeding hole steel plate in seal box, is filled in the insulated pouring material in seal box, coal feeding hole steel plate end is positioned at seal box, and coal feeding hole steel plate end is to the space between burner hearth tube panel entrance, and between coal feeding hole steel plate and insulated pouring material, fills by corundum-mullite wear-resistant castable and be shaped to coal feeding hole.
As selection, between coal feeding hole steel plate and corundum-mullite wear-resistant castable, it is additionally provided with aluminium silicate blanket or aluminium silicate felt cladding coal feeding hole.
As selection, the corrosive-proof plastic material of coal feeding hole exit surrounding forms abrasionproof boss to stove internal projection.As selection, heat-resisting bar-mat reinforcement prepared by the corrosive-proof plastic material abrasionproof boss in coal feeding hole exit and is fixed.
As selection, corundum-mullite wear-resistant castable is prepared heat-resisting bar-mat reinforcement and is fixed.
Expansion gap is left as between further selection, heat-resisting bar-mat reinforcement and corrosive-proof plastic material or corundum-mullite wear-resistant castable.
Aforementioned this utility model main formula case and each further selection scheme thereof can independent assortment to form multiple scheme; it is the scheme that this utility model can adopt and claim: such as this utility model; each selection can select combination in any with other; those skilled in the art can understand there is multiple combination according to prior art and known general knowledge after understanding the present invention program; it is the claimed technical scheme of this utility model, does not do exhaustive at this.
Generally it is in boiler furnace emulsion zone in recirculating fluidized bed (CFB) boiler coal feeding port area, working environment is reducing atmosphere, running temperature is at about 850 DEG C, here bed density is high, coal ash particle diameter is big, serious wear, and concentrated secondary wind, coal spread wind, the various perforate such as torch oil gun, these partially perforations can make material produce disturbance, eddy current, easily cause local heavy wear, original, the coal feeding hole steel plate that tradition uses inserts burner hearth, when boiler operatiopn, by the radiation of high-temperature flue gas in burner hearth, and the high-temperature flue gas that flue gas flow at high speed produces washes away, can cause that coal feeding hole steel plate is heated sharply to expand, but original steel plate structure coal feeding hole, by high temperature-proof, heat conductivity is low, the castable that wear-resisting intensity is high is coated with, owing to the coefficient of expansion of both steel plate and wear-resistant castable is inconsistent, the steel plate hot coefficient of expansion is big, castable thermal coefficient of expansion is little, and difference is big especially, thus it is limited to cause that coal feeding hole steel plate expands, coal feeding hole steel plate deformed warpage and the problem that burns out is caused to occur.
The CFBB castable coal feeding hole structure of this patent, for coal mouth Deformation Reasons, is puted forth effort to solve steel plate and castable expansion inconsistence problems, is also utilized high-abrasive material high temperature resistant, the feature that wearability is strong. Solution problem is just started with from these aspects, first former coal feeding hole steel plate is shortened in seal box, to reduce the high-temperature flue gas radiation to coal feeding hole steel plate in burner hearth, reduce steel plate because of thermal expansion institute limited degree, then pass through the problem using castable structure to solve to expand and wear and tear.
This patent coal feeding hole is mainly characterized in that:
1. shortening in the seal box outside furnace wall by former coal feeding hole steel plate, high-temperature flue gas time not directly by boiler operatiopn radiates and washes away, and reduces the expansion after coal supply steel plate is heated.
2., by after in coal feeding hole steel plate retraction seal box, coal feeding hole steel plate end, to the distance between burner hearth tube panel entrance, replaces steel plate coal feeding hole after using corundum-mullite wear-resistant castable molding. Preparing heat-resisting bar-mat reinforcement in corundum-mullite wear-resistant castable to be fixed, this fixing reinforcing bar has high temperature resistant, antiwear characteristic, can guarantee that its fixing intensity.
3. it is coated with coal feeding hole with aluminium silicate blanket (felt), reserve coal feeding hole steel plate expansion clearance, then corundum-mullite wear-resistant castable is laid again in the above, molding together with the corundum-mullite wear-resistant castable of porch, formed have wear-resisting, be unlikely to deform damage give coal channel, instead of the steel plate used before to coal channel.
4. in coal feeding hole exit surrounding, in order to reduce the abrasion that coal feeding hole is exported by bed, corrosive-proof plastic material thickeies and forms abrasionproof boss, reduces in boiler operatiopn, circulates the bed abrasion to coal feeding hole.
5. in order to ensure the fixing of the abrasionproof boss of the corrosive-proof plastic material in corundum-mullite wear-resistant castable and coal mouth exit, heat-resisting bar-mat reinforcement is laid in castable, simultaneously in order to reduce the impact on castable structure of the bar-mat reinforcement expanded by heating, gap is reserved between bar-mat reinforcement and castable, to absorb the thermal expansion difference between bar-mat reinforcement and castable, it is ensured that molding castable is not destroyed.
The beneficial effects of the utility model: by coal feeding hole to fire part, castable is used to replace steel plate, thoroughly solve that coal feeding hole steel plate expanded by heating is limited, buckling deformation, the problem that burns out, wear and tear, make coal feeding hole in boiler running process, steady quality, reliable, thus ensure that the operation that boiler is normal, continuous, safe.
Accompanying drawing explanation
Fig. 1 is the structural representation of this utility model embodiment;
Fig. 2 is the A-A revolved section schematic diagram of Fig. 1;
In figure, 1-coal feeding hole steel plate 2-corundum-mullite wear-resistant castable 3-aluminium silicate blanket (felt) 4-heat-resisting bar-mat reinforcement 5-insulated pouring material 6-corrosive-proof plastic material abrasionproof boss 7-burner hearth tube panel 8-seal box.
Detailed description of the invention
Below in conjunction with specific embodiments and the drawings, this utility model is further described.
With reference to Fig. 1, shown in 2, a kind of Coal Feeding in Circulating Fluidized Bed Furnace mouth structure, including burner hearth tube panel 7, the corrosive-proof plastic material of burner hearth tube panel 7 inwall, the seal box 8 of burner hearth tube panel 7 outer wall, stretches into the coal feeding hole steel plate 1 in seal box 8, and is filled in the insulated pouring material 5 in seal box 8, in this coal feeding hole structure, coal feeding hole steel plate 1 end is positioned at seal box 8. Being retracted by coal feeding hole steel plate 1 after in seal box 8, steel plate end, to the distance between burner hearth tube panel 7 entrance, uses replacement steel plate coal feeding hole after corundum-mullite wear-resistant castable 2 molding of 66mm left and right thickness. In addition, calculate the swell increment of coal feeding hole steel plate 1 in working environment lower seal box 8 further, it is coated with coal feeding hole with aluminium silicate blanket (felt) 3, reserve coal feeding hole steel plate 1 expansion clearance, then the corundum-mullite wear-resistant castable 2 of 60mm thickness is laid again in the above, molding together with the corundum-mullite wear-resistant castable 2 of porch 66mm, formed have wear-resisting, be unlikely to deform damage give coal channel, instead of the steel plate used before to coal channel. In coal feeding hole exit surrounding, in order to reduce the abrasion that coal feeding hole is exported by bed, corrosive-proof plastic material thickeies high about about 100mm, forms corrosive-proof plastic material abrasionproof boss 6, reduces in boiler operatiopn, circulates the bed abrasion to coal feeding hole. Corundum-mullite wear-resistant castable 2 and corrosive-proof plastic material abrasionproof boss 6 are prepared the heat-resisting bar-mat reinforcement 4 of �� 6 fixed, material is SA-479GR309S, reinforcing bar mesh is 100 �� 100mm, and this fixing reinforcing bar has high temperature resistant, antiwear characteristic, can guarantee that its fixing intensity. And in order to ensure the fixing of corundum-mullite wear-resistant castable 2 and corrosive-proof plastic material abrasionproof boss 6, heat-resisting bar-mat reinforcement 4 is laid in castable, simultaneously in order to reduce the impact on castable structure of the bar-mat reinforcement expanded by heating, before castable construction, the Colophonium of 1��2mm should be brushed on bar-mat reinforcement, then pour into a mould wear-resistant castable. Colophonium, after high/low temperature baker, by burning-off, will reserve gap, to absorb the thermal expansion difference between bar-mat reinforcement and castable, it is ensured that molding castable is not destroyed.
The foregoing is only preferred embodiment of the present utility model; not in order to limit this utility model; all any amendment, equivalent replacement and improvement etc. made within spirit of the present utility model and principle, should be included within protection domain of the present utility model.
Claims (6)
1. a Coal Feeding in Circulating Fluidized Bed Furnace mouth structure, including burner hearth tube panel, the corrosive-proof plastic material of burner hearth tube panel inwall, the seal box of burner hearth tube panel outer wall, stretches into the coal feeding hole steel plate in seal box, is filled in the insulated pouring material in seal box, it is characterized in that: coal feeding hole steel plate end is positioned at seal box, and coal feeding hole steel plate end is to the space between burner hearth tube panel entrance, and between coal feeding hole steel plate and insulated pouring material, fills by corundum-mullite wear-resistant castable and be shaped to coal feeding hole.
2. Coal Feeding in Circulating Fluidized Bed Furnace mouth structure as claimed in claim 1, it is characterised in that: it is additionally provided with aluminium silicate blanket or aluminium silicate felt cladding coal feeding hole between coal feeding hole steel plate and corundum-mullite wear-resistant castable.
3. Coal Feeding in Circulating Fluidized Bed Furnace mouth structure as claimed in claim 1, it is characterised in that: the corrosive-proof plastic material of coal feeding hole exit surrounding forms abrasionproof boss to stove internal projection.
4. Coal Feeding in Circulating Fluidized Bed Furnace mouth structure as claimed in claim 3, it is characterised in that: heat-resisting bar-mat reinforcement prepared by the corrosive-proof plastic material abrasionproof boss in coal feeding hole exit and is fixed.
5. Coal Feeding in Circulating Fluidized Bed Furnace mouth structure as claimed in claim 1, it is characterised in that: corundum-mullite wear-resistant castable is prepared heat-resisting bar-mat reinforcement and is fixed.
6. the Coal Feeding in Circulating Fluidized Bed Furnace mouth structure as described in claim 4 or 5, it is characterised in that: leave expansion gap between heat-resisting bar-mat reinforcement and corrosive-proof plastic material or corundum-mullite wear-resistant castable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521112585.2U CN205299503U (en) | 2015-12-29 | 2015-12-29 | Circulating fluidized bed boiler coal supply mouth structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521112585.2U CN205299503U (en) | 2015-12-29 | 2015-12-29 | Circulating fluidized bed boiler coal supply mouth structure |
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| CN205299503U true CN205299503U (en) | 2016-06-08 |
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| CN201521112585.2U Active CN205299503U (en) | 2015-12-29 | 2015-12-29 | Circulating fluidized bed boiler coal supply mouth structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107191730A (en) * | 2017-06-30 | 2017-09-22 | 陕西陕煤黄陵矿业有限公司 | A kind of non-metal expansion joint expands gap kuppe |
-
2015
- 2015-12-29 CN CN201521112585.2U patent/CN205299503U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107191730A (en) * | 2017-06-30 | 2017-09-22 | 陕西陕煤黄陵矿业有限公司 | A kind of non-metal expansion joint expands gap kuppe |
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