CN205782885U - A kind of big-and-middle-sized Coal Feeding in Circulating Fluidized Bed Furnace mouth - Google Patents
A kind of big-and-middle-sized Coal Feeding in Circulating Fluidized Bed Furnace mouth Download PDFInfo
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- CN205782885U CN205782885U CN201620506997.2U CN201620506997U CN205782885U CN 205782885 U CN205782885 U CN 205782885U CN 201620506997 U CN201620506997 U CN 201620506997U CN 205782885 U CN205782885 U CN 205782885U
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- burner hearth
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- feeding hole
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Abstract
A kind of big-and-middle-sized Coal Feeding in Circulating Fluidized Bed Furnace mouth, including seal box, upper plate and lower shoe, extending the coal feed point forming the wealthyest formula between upper plate and lower shoe outside burner hearth, seal box uses layer-stepping cast structure, is Wear-resistant, high-temperature resistant material for adiabatic heat-insulation castable, inner side outside it；Upper plate and lower shoe are also one-body molded by Wear-resistant, high-temperature resistant alloy cast steel plate+wearing-proof refractory material casting-in.This is the most novel has that simple in construction, material price cheap are easy to get, using effect is good, the advantage of length in service life.
Description
Technical field
This utility model relates to Sector of Cfb Boilers, especially relates to a kind of bigInType CFBB (CFB) coal feeding hole.
Background technology
Circulating fluidized-bed boiler Combustion technology is owing to having that coal adaptability is wide, flameholding, pollutant discharge amount are low and easily controllable and lime-ash such as can comprehensively utilize at the advantage, become the currently the only high-efficiency cleaning realizing commercialization and maximization burning and utilize technology, use gangue, slime, wash the low calorie fuels such as middle coal, bone coal, oil shale, turn waste into wealth.By in by the end of September, 2015,168,92 prefecture-level cities in whole nation distributions Large-scale CFB unit generation factory, 135MW grade CFB unit operation 372, total installation of generating capacity 68490MW；50MW grade CFB unit operation 750,25MW grade CFB unit operation 1400, total installation of generating capacity 62000MW；Chain drive manufacturing enterprise of China has supplied overseas CFB unit 47, total installation of generating capacity 6390MW；CFB unit generation in the accounting of China's fire coal thermal power generation more than 15%；Single-machine capacity 300MW and above fluidized-bed combustion boiler spread thereof, put into operation in the whole nation about 110 of 300MW subcritical CFB, 350MW supercritical CFB has debugged 10, and 600MW supercritical CFB has put into operation 1,4 and built.China has become as the research and development of large-scale fluidized bed boiler technology and makes the country prosperous.
According to investigation, Coal Feeding System for Circulating Fluidized Bed Combustion Boiler chute blockage at present, the faults frequents such as coal feeding hole burns out, wear and leakage occur, perplexing the long-term operation of CFBB, each blowing out of coal feeding hole must be overhauled, and is even replaced always, coal feeding hole is the burning core key device of CFB boiler, once coal feeding hole chute blockage, the serious chute blockage of boiler, easily cause coal feeding hole and burn out and cause unit load down even boiler forced outage.Coal feeding hole chute blockage burns out, a difficult problem of wear and leakage always puzzlement power plant safety economical operation for a long time.
Coal Feeding in Circulating Fluidized Bed Furnace mouth designs at emulsion zone, and general position is away from air distribution plate 1.0-2.0m；Owing to design coal is different, for extending coal supply time of staying in burner hearth further, most big-and-middle-sized Coal Feeding in Circulating Fluidized Bed Furnace mouths design at air distribution plate 1.0m.Considering coal spread wind in coal feeding hole design, one is to carry coal stream to enter burner hearth, and two is to seal cooling coal feeding hole to prevent from burning out, and in reducing stove, material returns burning.Owing to most CFB boiler are to reduce fuel cost to mix and burn washing middle coal, washing mixed coal etc. and easily cause stokehold coal bunker and the fluffy coal of coal spout, coal feeding hole chute blockage problem of high moisture content.Once coal feeding hole chute blockage, coal feeding hole loses the cooling of coal stream and coal spread wind, easily burns red, causes coal feeding hole alloy-steel plate to deform, deteriorate further, ultimately result in coal feeding hole and burn out.Because coal feeding hole is in boiler emulsion zone, environment alternating hot and cold is frequent, alternate stress big, the faults such as coal feeding hole steel plate deformed, coal feeding hole castable come off easily occurs.Coal feeding hole chute blockage majority uses artificial dredging, because being in malleation in properly functioning stove, easily causes high temperature bed ejection in operation during dredging, once deal with improperly, casualty accident easily occurring and burns out coal feeding hole and surrounding equipment thereof, the expansion that causes the accident must process in blowing out, has a strong impact on safe operation of the boiler.
Summary of the invention
The purpose of this utility model is to overcome shortcoming present in the design of existing big-and-middle-sized Coal Feeding in Circulating Fluidized Bed Furnace mouth structure, it is provided that a kind of boiler coal feeding mouth using Wear-resistant, high-temperature resistant castable pouring type to be formed, with the problem solving coal feeding hole chute blockage, burn out.The technical scheme is that a kind of big-and-middle-sized Coal Feeding in Circulating Fluidized Bed Furnace mouth, including seal box, upper plate and lower shoe, extend outside burner hearth between described upper plate and lower shoe and form the wealthyest formula coal feed point, it is characterized in that: described seal box uses layer-stepping cast structure, outside it, pour into a mould adiabatic heat-insulation material, inner side cast wearing-proof refractory material；Described upper plate and lower shoe are cast on Wear-resistant, high-temperature resistant alloy cast steel plate one-body molded by wearing-proof refractory material.
Technical characteristic of the present utility model also has: the wealthyest described formula coal feed point is the wealthyest bucket-shaped formula coal feed point.
Technical characteristic of the present utility model also has: described coal feed point includes coal feeding hole and the outer coal feeding hole of burner hearth in burner hearth, the fin panel casing of described seal box and surrounding is by sealing of tube pin, described seal box nearly burner hearth side cast wearing-proof refractory material, described seal box closely described in the wealthyest formula coal feed point side cast adiabatic heat-insulation castable；It is cast on heat resisting steel reinforced net anchoring piece with coal feeding hole wearing-proof refractory material in described burner hearth, forms integrated molding structure.
Technical characteristic of the present utility model also has: be welded to connect pin on fin panel casing around coal feeding hole in described burner hearth, it is cast on heat resisting steel reinforced net anchoring piece with coal feeding hole wearing-proof refractory material in described burner hearth, forms coal feeding hole surrounding and the casting-in molding structure of burner hearth fin panel casing integrated connection in described burner hearth.
Technical characteristic of the present utility model also has: in seal box, water-cooling wall allows pipe and furnace wall cooling junction carry out welded seal, and at its surface soldered pin, pours into a mould described wearing-proof refractory material.
Technical characteristic of the present utility model also has: described wearing-proof refractory material is zirconium chrome corundum abrasion-proof and refractory pouring material or zirconium chrome corundum abrasion-proof fire-resistant moldable refractory.
Effect of the present utility model is: 1) moldable will not the deformation under 1700 DEG C of high temperature of this coal feeding hole cast, has exceeded the high temperature limit of former coal feeding hole foundry goods steel plate 1200 DEG C, has solved owing to coal feeding hole burns out the chute blockage technical barrier caused；2) integrated molding structure coal feeding hole has good abrasion-proof and refractory, effectively extends the service life of coal feeding hole；3) bonding strength outside the use of connecting pin and steel grid enhances stove, between stove inner segment coal feeding hole and furnace wall cooling, improves the rigidity of coal feeding hole, strengthens its fastness；4) this most novel has that simple in construction, material price cheap are easy to get, using effect is good, the advantage of length in service life.
Accompanying drawing explanation
Accompanying drawing 1 is this utility model structure wearing-proof refractory material casting-in integral type coal feeding hole schematic diagram, wherein 1 is water-cooling wall, 2 is connecting pin, and 3 is 90 degree of turning heat resisting steel reinforced nets, and 4 is seal box, 5 is insulated pouring material, 6 is blast cap, and 7 is that wearing-proof refractory material waters integrator molding coal feeding hole, and 8 is upper plate, 9 is lower shoe, and 10 is coal spread wind air inlet.
Detailed description of the invention
Below in conjunction with the accompanying drawings, detailed description of the invention of the present utility model is illustrated.Present embodiment discloses a kind of big-and-middle-sized Coal Feeding in Circulating Fluidized Bed Furnace mouth, this coal feeding hole includes seal box 4, upper plate 8 and lower shoe 9, stretch out between upper plate 8 and lower shoe 9 the wealthyest formula coal feed point of formation, seal box 4 uses layer-stepping to pour into a mould structure, its outer layer be insulated pouring material 5, internal layer be wearing-proof refractory material, upper plate 8 and lower shoe 9 are watered integrator molding coal feeding hole 7 by Wear-resistant, high-temperature resistant steel-casting and wearing-proof refractory material.
In the present embodiment, needing smoothly to enter coal, upper plate 8 is set to the flat board tilted, lower shoe is connected with coal spread wind air inlet 10, and the coal feed point of this wealthyest formula is the square type the wealthyest formula coal feed point that collar extension is big, internal orifice is little.
In the present embodiment, in order to improve coal feeding hole connectivity robustness, being welded to connect pin 2 on membrane wall around burner hearth, seal box 4 is cast on integrated molding coal feeding hole steel grid, in moving integrated molding coal feeding hole steel grid to burner hearth and make have 90 degree of turnings.
The wearing-proof refractory material used in the present embodiment is zirconium chrome corundum abrasion-proof and refractory pouring material or zirconium chrome corundum abrasion-proof fire-resistant moldable refractory.New-built unit brickwork can use zirconium chrome corundum abrasion-proof and refractory pouring material, preferably uses chrome corundum abrasion-proof fire-resistant moldable refractory；Chrome corundum abrasion-proof fire-resistant moldable refractory should be used during technological transformation.
Construction technology is:
1, use integral cast steel coal feeding hole to undergo technological transformation as original, utilize CUT to remove furnace wall cooling peripheral part coal feeding hole cast steel plate, remove seal box and internal refractory castable thereof and adiabatic heat-insulation castable, and clean out.Abrasion-proof and refractory pouring material on coal feeding hole surrounding burner hearth fin panel casing and bitch thereof or abrasion-proof fire-resistant moldable refractory must be cleaned out simultaneously.
2, coal feeding hole is positioned at burner hearth fin panel casing and allows pipe concentration zones, and water-cooling wall easily causes refractory material to come off as do not welded bitch.Therefore palpus repair welding Y-shaped connecting pin on coal feeding hole surrounding burner hearth fin panel casing, should add inside coal feeding hole surrounding abrasion-proof and refractory pouring material or abrasion-proof fire-resistant moldable refractory heat-resisting bar-mat reinforcement and with repair welding Y-shaped pin anchor connection on surrounding water screen tube, with the both sides alloy cast one-body molded coal feeding hole of steel plate casting-in of upper plate, lower shoe and integrally casting thereof.
3, the selection of high-temperature resistant Y-shaped bitch and heat-resisting bar-mat reinforcement is close with the coefficient of thermal expansion performance of abrasion-proof and refractory pouring material or abrasion-proof fire-resistant moldable refractory, and qualified can use through inspection before use；Abrasion-proof and refractory pouring material or abrasion-proof fire-resistant moldable refractory construction before, it is necessary to carry out sample inspection qualified and according to the prefabricated test block of site operation environment and through inspection qualified, can use.
4, coal feeding hole uses zirconium chrome corundum abrasion-proof and refractory pouring material or the zirconium chrome corundum abrasion-proof fire-resistant moldable refractory of abrasion-proof and refractory, in zirconium chrome corundum abrasion-proof and refractory pouring material or abrasion-proof fire-resistant moldable refractory construction, it is close to burner hearth fin panel casing and steel-casting upper and lower sole plate metal part contact position should be stayed and set dilatation joint, tamp ceramic fiber paper.Coal feeding hole surrounding is connected to become steel grid with increasing weldering Y type bitch in burner hearth fin panel casing and seal box, and steel grid burner hearth to be moved to is interior and makes turning in 90 °, to strengthen the anchoring property of coal feeding hole aperture area surrounding wearing-proof refractory material.
4, the construction mould dimensional requirement at coal feeding hole hole position is very accurate, and construction mould to firmly install, and does not allow hole centrage bias and absolute altitude deviation occur, otherwise appears in the bias run in using and wash away, does not reaches design requirement and cause aggravation of wearing and tearing.Note during construction staying at wearing-proof refractory material and metal pieces into contact setting dilatation joint, coal feeding hole in operation must not be hindered upper and lower and thermal expansion between both sides alloy cast steel plate and wearing-proof refractory material.
5, abrasion-proof and refractory pouring material or abrasion-proof fire-resistant moldable refractory construction, must strictly press design drawing, construction technique normalizing, producer's material property and construction technical requirement, the cross dimensions of coal feeding hole must strictly control, and construction must must not be interrupted continuously, standard construction and maintenance.Necessary smooth, the 90 ° of necessary transitions smooth in corner surface of abrasion-proof and refractory pouring material or abrasion-proof fire-resistant moldable refractory surface, it is to avoid unstable wear.
6, seal box inner lining material wearing-proof refractory material, the construction of insulated pouring material, wearing-proof refractory material of first having constructed construction carries out outer layer insulated pouring material again and pours.Seal box must reserve weep hole after having constructed, the closure of repair welding in time again when seal box inner lining material moisture is thoroughly discharged by boiler operatiopn a period of time, it is to avoid the moisture in hot operation environment lower seal box inner lining material cannot be discharged and be produced vapour pressure and cause seal box leakage or damage.
Certainly; described above is not limitation of the utility model; this utility model is also not limited to the example above, change that those skilled in the art are made in essential scope of the present utility model, retrofits, adds or replaces, and falls within protection domain of the present utility model.
Claims (6)
1. a big-and-middle-sized Coal Feeding in Circulating Fluidized Bed Furnace mouth, including seal box, upper plate and lower shoe, described on
Extend outside burner hearth between base plate and lower shoe and form the wealthyest formula coal feed point, it is characterised in that: described seal box is adopted
Pour into a mould structure with layer-stepping, outside it, pour into a mould adiabatic heat-insulation material, inner side cast wearing-proof refractory material；The described upper end
Plate and lower shoe are cast on Wear-resistant, high-temperature resistant alloy cast steel plate one-body molded by wearing-proof refractory material.
2. according to the boiler coal feeding mouth described in claim 1, it is characterised in that: the wealthyest described formula coal feed point side of being
Bucket shape the wealthyest formula coal feed point.
3. according to the boiler coal feeding mouth described in claim 2, it is characterised in that: in described coal feed point includes burner hearth
Coal feeding hole and the outer coal feeding hole of burner hearth, the fin panel casing of described seal box and surrounding is by sealing of tube pin, described close
Jacket nearly burner hearth side cast wearing-proof refractory material, described seal box closely described in the wealthyest formula coal feed point side cast thermal insulation protect
Temperature castable；It is cast on heat resisting steel reinforced net anchoring piece with coal feeding hole wearing-proof refractory material in described burner hearth, shape
Integralization molding structure.
4. according to the boiler coal feeding mouth described in claim 3, it is characterised in that: in described burner hearth around coal feeding hole
Fin panel casing on be welded to connect pin, be cast in heat resisting steel with coal feeding hole wearing-proof refractory material in described burner hearth
On reinforced net anchoring piece, form coal feeding hole surrounding and the casting-in of burner hearth fin panel casing integrated connection in described burner hearth
Molding structure.
5. according to the boiler coal feeding mouth described in claim 4, it is characterised in that: in seal box water-cooling wall allow pipe with
Furnace wall cooling junction carries out welded seal, and at its surface soldered pin, pours into a mould described wearing-proof refractory material.
6. according to the boiler coal feeding mouth described in claim 5, it is characterised in that: described wearing-proof refractory material is zirconium chromium
Corundum abrasion-proof and refractory pouring material or zirconium chrome corundum abrasion-proof and refractory water moldable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620506997.2U CN205782885U (en) | 2016-05-27 | 2016-05-27 | A kind of big-and-middle-sized Coal Feeding in Circulating Fluidized Bed Furnace mouth |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620506997.2U CN205782885U (en) | 2016-05-27 | 2016-05-27 | A kind of big-and-middle-sized Coal Feeding in Circulating Fluidized Bed Furnace mouth |
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| Publication Number | Publication Date |
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| CN205782885U true CN205782885U (en) | 2016-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620506997.2U Active CN205782885U (en) | 2016-05-27 | 2016-05-27 | A kind of big-and-middle-sized Coal Feeding in Circulating Fluidized Bed Furnace mouth |
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Cited By (2)
| 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 |
| CN109185873A (en) * | 2018-09-29 | 2019-01-11 | 哈尔滨锅炉厂有限责任公司 | A kind of coal feeding hole device for circulating fluidized bed boiler |
-
2016
- 2016-05-27 CN CN201620506997.2U patent/CN205782885U/en active Active
Cited By (3)
| 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 |
| CN109185873A (en) * | 2018-09-29 | 2019-01-11 | 哈尔滨锅炉厂有限责任公司 | A kind of coal feeding hole device for circulating fluidized bed boiler |
| CN109185873B (en) * | 2018-09-29 | 2023-12-12 | 哈尔滨锅炉厂有限责任公司 | Coal feeding port device for circulating fluidized bed boiler |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190701 Address after: 273516 No. 16 Gongjian Road, Beishu Town, Zoucheng City, Jining City, Shandong Province Patentee after: Yankuang Zhongke Clean Energy Technology Co., Ltd. Address before: 273599 No. 298, Fushan South Road, Zoucheng, Jining, Shandong Patentee before: Yanzhou Coal Industry Co., Ltd. |
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| TR01 | Transfer of patent right |