CN1055807A - The method of burning sludge with circulating fluidized-bed boiler - Google Patents
The method of burning sludge with circulating fluidized-bed boiler Download PDFInfo
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- CN1055807A CN1055807A CN 91103602 CN91103602A CN1055807A CN 1055807 A CN1055807 A CN 1055807A CN 91103602 CN91103602 CN 91103602 CN 91103602 A CN91103602 A CN 91103602A CN 1055807 A CN1055807 A CN 1055807A
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Abstract
The invention discloses a kind of method of burning sludge with circulating fluidized-bed boiler.This method different coal slime of various moisture content of can burning.CFBB must any processing in advance before coal slime is sent into coal slurry feeder.Its main feature is separator to be set loose unburnt fuel particle with higher temperature is separated from coal ash with coal slime mixed, become not conglomeration and be granular fuel, send into the burner hearth burning again.This method has high economic benefit and social benefit.
Description
The present invention relates to the method for the ciculation fluidized burning coal slime of a kind of Industrial Boiler.
Because coal slime moisture content instability, it is low easily to form clod, ash content height, calorific value; Therefore transporting, in the feed, drying, combustion process, corresponding apparatus had special requirement.Though coal slime is being had some designs and practice both at home and abroad aspect the boiler main fuel at present, is not having very good technical method to come out so far as yet.The power plant boiler system of domestic come into operation recently one burning coal slime, its method characteristics after the coal slime with moisture content 25%～30% is processed into the bulky grain of 8～50 millimeters of diameters, drop into bubbling type fluidized bed boiler internal combustion again.Its weak point is: must be processed into bulky grain to coal slime before a, the burning, increase workload; B, coal slime are stored up and are transported moisture content is fallen below 25%, at this moment will add water to coal slime; C, the bubbling type fluidized bed boiler thermal efficiency are generally 60%～70%, not as the height of fluidized-bed combustion boiler.The coal-fired mud boiler technology method of France Alstom is to add the coal slurry that additive is made moisture content 33% in coal slime, sprays into the stove internal combustion, and its weak point is: a, pipeline must be processed into coal slurry to coal slime, the technical process more complicated before carrying; B, coal slurry moisture content are higher, can not burn immediately after spraying in the stove; C, need with a set of tubes conveying equipment; D, palpus improve furnace height, increase capital expenditure.
The invention provides a kind of can dry in advance coal slime, the fuel that drops into burner hearth is not lumpd, before sending into coal slurry feeder, the method that does not need any processing in advance just can carry out ciculation fluidized burning.
Method principle of the present invention is as follows: a separator is set fuel particle unburnt and that be in high temperature or middle temperature is separated from coal ash, be delivered to stirring and even drying device by pipeline, simultaneously coal slime also is delivered to by coal mud feeding device and stirs and even drying device and unburnt fuel particle stirring and even, will be returned to the burner hearth internal combustion with the fuel after even then.
In stirring and even drying device, unburnt fuel particle and coal slime are mixed into not conglomeration, are the fuel of graininess, and are the condition of high temperature, are convenient to burning.
Enter in separator and the coal mud feeding device for fear of the steam that when stirring and spare drying, produces, influence the operate as normal and the service life of separator and coal mud feeding device, between separator and stirring and even drying device, realize the lock airway dysfunction by automatic control air-lock device, prevent that steam from entering separator, simultaneously also between coal mud feeding device and stirring and even drying device, air-lock device is set, prevents that steam from entering coal mud feeding device.
Method of the present invention is applicable to the coal slime that various moisture content are different, has eliminated the operating procedure link that adds water in coal slime; Coal slime did not need any processing before entering coal mud feeding device, simplified process greatly; Utilize the laxity of isolated unburnt fuel particle to overcome the bonding conglomeration of coal slime; Effectively prevent the coal slime conglomeration; Utilize the middle and high temperature of an isolated unburnt fuel material to come dry coal slime, make fuel combination near burning-point or reach ignition temperature; Improve burner hearth usefulness to greatest extent, improve the Control for Kiln Temperature ability,,, can significantly reduce the waste of the energy until after-flame because unburnt fuel particle can carry out circulating combustion.
According to this method a plurality of specific embodiments can be arranged, below will list three embodiment this method is narrated.
Below in conjunction with accompanying drawing this method is further described in detail.
Fig. 1 is the ciculation fluidized burning process block diagram of coal slime of the present invention.
Fig. 2, Fig. 3 are that the stove of the embodiment of the invention one descends the coal-fired mud CFBB of warm divergence type schematic diagram in the exhaust outward.
Fig. 4, Fig. 5 are the coal-fired mud CFBB of the outer horizontal divergence type of the stove of the embodiment of the invention two schematic diagrames.
Fig. 6, Fig. 7 are the coal-fired mud CFBB of the interior vortex divergence type of the stove of the embodiment of the invention three schematic diagrames.
With reference to Fig. 1.The method of burning sludge with circulating fluidized-bed boiler is: newly increased separator, stirring and even drying device, foldback device and attached lock gas system on the basis of common CFBB.Coal slime is separated unburnt fuel particle by separator in combustion process from coal ash, and sends into stirring and even drying device along pipeline.Separator has two outlets, one is the ash discharge cinder notch, another is unburnt fuel particle delivery outlet, and an inlet of unburnt fuel particle delivery outlet and stirring and even drying device joins, and another inlet of stirring and even drying device joins with coal mud feeding device.In having temperature become the unburnt fuel particle of high temperature to enter to stir and even drying device in together stir with the coal slime of sending here from coal mud feeding device and spare, make unburnt fuel particle wrap coal slime, become the graininess fuel of not conglomeration, make fuel before sending into burner hearth, just be in burning-point and become near the burning-point state.The delivery outlet of stirring and even drying device connects the inlet of foldback device.The outlet of foldback device and the charging aperture of burner hearth join.Stir and even after fuel send into burner hearth by the foldback device.One lock gas system is arranged between separator and stirring and even drying device.Its purpose is exactly to prevent to stir and the steam of even drying device inside enters separator, thereby influences the life-span of separator work and separator.One lock gas system is arranged between coal mud feeding device and stirring and even drying device, and it mainly is to prevent to stir and the steam of even drying device inside enters coal mud feeding device, thereby influences the life-span of coal mud feeding device.
With reference to Fig. 2, Fig. 3.This is that the embodiment of the invention one-stove descends the coal-fired mud CFBB of warm divergence type in the exhaust outward.The coal slime of as fired fuel hopper dredger (1) enters by coal mud feeding device (2) and scratch board conveyor (3) and stirs and even drying device (4); and mix with the isolated unburnt fuel particle of separator (stove descends warm divergence type in the exhaust outward) (5); make unburnt fuel particle wrap coal slime; become not conglomeration and be the fuel of graininess, that utilizes then that foldback device (6) will mix has burning-point or is returned to burner hearth (7) internal combustion near the fuel of the graininess of ignition temperature.Promptly finish a ciculation fluidized combustion process.Be characterized in: 1, middle temperature is separated, and does not burn in the separator.Separator is easily processed, and cost is low, and the life-span is long; 2, the fuel temperature of sending in the burner hearth is favourable to Control for Kiln Temperature under the underload situation; 3, isolated unburnt fuel particle be transmitted back to stir and the distance of even drying device far away.
With reference to Fig. 4, Fig. 5.This is the coal-fired mud CFBB of the outer horizontal divergence type of the embodiment of the invention two-stove.The coal slime of as fired fuel hopper dredger (1) enters by coal mud feeding device (2) and stirs and even drying machine (4) and mixes with the isolated unburnt and fuel particle that be in the condition of high temperature of separator (the outer horizontal divergence type of stove) (5) stirs and spares; make it to become not conglomeration and be the fuel with ignition temperature of graininess, then mixed fuel is returned to burner hearth (7) internal combustion by foldback device (6).Promptly finish a ciculation fluidized combustion process.Be characterized in: 1, separator is above burner hearth; 2, isolated unburnt fuel particle temperature drift; 3, isolated fuel particle loopback distance is shorter; 4, the manufacture difficulty of separator is bigger.
With reference to Fig. 6, Fig. 7.This is the coal-fired mud CFBB of vortex divergence type in the embodiment of the invention three-stove.The handy coal mud feeding device of coal slime (2) of as fired fuel hopper dredger (1) and scratch board conveyor (3) are sent into it and are stirred and even drying device (4); and with after the isolated unburnt and fuel particle that be in the condition of high temperature of separator (stove in vortex divergence type) (5) mixes stirring; utilize foldback device (6) to stir and spare the fuel that is graininess to be returned to burner hearth (7) internal combustion, promptly finish a ciculation fluidized combustion process with ignition temperature.Be characterized in: 1, separator influences furnace height in burner hearth; 2, the life-span of separator is longer; 3, the particle size range of Fen Liing is bigger; 4, can alleviate the burden of dust collector behind the stove.
Because isolated fuel particle has higher temperature, with must produce a large amount of steam after coal slime is mixed, thereby influence the operate as normal and the service life of separator and coal mud feeding device, so between separator (5) and stirring and even drying device (4), utilize automatic control system to form lock gas system, prevent that steam from entering separator; Utilize enclosed construction to realize a lock gas system between stirring and even drying device (4) and coal mud feeding device (2), its purpose prevents that steam from entering coal mud feeding device.
Be respectively equipped with on coal mud feeding device (2) and the foldback device (6) and can regulate the device of feeding coal and foldback amount according to payload.
Claims (1)
1, a kind of method of burning sludge with circulating fluidized-bed boiler, its characteristics are: newly increased separator on common recirculating fluidized bed basis, stir and even drying device, foldback device and attached lock gas system, separator has two outlets, one is slag-drip opening, another is unburnt fuel particle delivery outlet, an inlet of unburnt fuel particle delivery outlet and stirring and even drying device joins, another inlet of stirring and even drying device joins with coal mud feeding device, the delivery outlet of stirring and even drying device connects the inlet of foldback device, the outlet of foldback device and the charging aperture of burner hearth join, one lock gas system is arranged between separator and stirring and even drying device, a lock gas system is arranged between coal mud feeding device and stirring and even drying device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91103602 CN1055807A (en) | 1991-05-31 | 1991-05-31 | The method of burning sludge with circulating fluidized-bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91103602 CN1055807A (en) | 1991-05-31 | 1991-05-31 | The method of burning sludge with circulating fluidized-bed boiler |
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| Publication Number | Publication Date |
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| CN1055807A true CN1055807A (en) | 1991-10-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 91103602 Pending CN1055807A (en) | 1991-05-31 | 1991-05-31 | The method of burning sludge with circulating fluidized-bed boiler |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102032557B (en) * | 2009-09-29 | 2012-06-27 | 哈尔滨锅炉厂有限责任公司 | Method and device for burning coal slime in circulating fluidized bed boiler |
| CN103557518A (en) * | 2013-10-14 | 2014-02-05 | 上海交通大学 | Organic working medium boiler for coal washery sludge combustion |
| CN113531521A (en) * | 2021-08-25 | 2021-10-22 | 温州宏泽热电股份有限公司 | Combustion control system of circulating fluidized bed boiler |
-
1991
- 1991-05-31 CN CN 91103602 patent/CN1055807A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102032557B (en) * | 2009-09-29 | 2012-06-27 | 哈尔滨锅炉厂有限责任公司 | Method and device for burning coal slime in circulating fluidized bed boiler |
| CN103557518A (en) * | 2013-10-14 | 2014-02-05 | 上海交通大学 | Organic working medium boiler for coal washery sludge combustion |
| CN103557518B (en) * | 2013-10-14 | 2016-02-10 | 上海交通大学 | The organic working medium boiler of slime burning |
| CN113531521A (en) * | 2021-08-25 | 2021-10-22 | 温州宏泽热电股份有限公司 | Combustion control system of circulating fluidized bed boiler |
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| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |