CN201281345Y - Fluidized bed incinerator, circulating fluidized bed incinerator and incineration system - Google Patents
Fluidized bed incinerator, circulating fluidized bed incinerator and incineration system Download PDFInfo
- Publication number
- CN201281345Y CN201281345Y CNU2008201089826U CN200820108982U CN201281345Y CN 201281345 Y CN201281345 Y CN 201281345Y CN U2008201089826 U CNU2008201089826 U CN U2008201089826U CN 200820108982 U CN200820108982 U CN 200820108982U CN 201281345 Y CN201281345 Y CN 201281345Y
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- Prior art keywords
- fluidized bed
- bed incinerator
- burner hearth
- incinerator
- structural portion
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Abstract
The utility model provides a fluidized bed incinerator, a circulating fluidized bed incinerator and a corresponding incineration system which can effectively promote the waste burnout and improve the combustion efficiency in the incinerator. In order to achieve this goal, the bottom of a furnace of the fluidized bed incinerator is provided with an air distribution plate (3); wherein, the lower side of the air distribution plate is provided with a primary air inlet (1) and a slag discharging outlet (2); the middle part of the furnace is a waist structure part (5), and a secondary air inlet (6) is symmetrically arranged above the waist structure part; the top of the furnace is provided with an outlet; wherein, the lower part of the furnace which is connected with the bottom is a divergent structure part (4); the circulating fluidized bed incinerator also comprises a gas-solid separator (7) and a recycle system (8) which are connected with the circulating fluidized bed incinerator. The incineration system is that: a flue gas pipeline (9) is provided sequentially with a tail-heating surface (10), a flue gas purification part (11) and a flue gas dust removing part (12) which are connected with the fluidized bed incinerator or the circulating fluidized bed incinerator.
Description
Technical field
The utility model relates to the burning of house refuse to be handled, and is specifically related to a kind of fluidized bed incinerator, circulating fluidized bed incinerator and CIU.
Background technology
Along with expanding economy, China's domestic waste year generation is increasing rapidly, and a large amount of sanitary fills has brought great harm to environment.Waste incineration is to reduce combustible waste by high-temp combustion, and rubbish is become inert residue.Can realize that subtracting rapidly of rubbish hold the decrement effect, and realize the harmless treatment of rubbish.At present, the main flow equipment of the large-scale domestic waste incineration of most countries is stoker fired grate formula incinerator and fluidized bed incinerator in the world.In general, the former is suitable for incinerating combustion value than higher house refuse, and efficiency of combustion is lower, steam production is low, involve great expense, the maintenance cost height; The latter is good to low-calorie rubbish adaptability, and efficiency of combustion is higher.
Notification number is that the Chinese utility model patent (patent documentation 1) of CN200993367 has provided a kind of circulating fluid bed garbage furnace, lean forward air distribution plate and after wind type water cooled wind chamber are adopted in the combustion chamber, and this design helps the smooth discharge of bulk furnace charge and the layout in an airduct road.The superheater and the sour gas that are arranged in the heat exchange type material returning device are isolated, have avoided the high temperature corrosion of sour gas to the superheater pipe.
Notification number is that the Chinese utility model patent (patent documentation 2) of CN201028533 has provided a kind of surface bed fluidization incinerator, comprises the hot-air mouth of body of heater, air port, top, charging aperture and bottom.The height H of the interior fluosolids of stove and the ratio H:D of the inner diameter D of body of heater〉1:2, the charging aperture on the body of heater top is 3-9, and evenly distributes along the section at body of heater top.
Publication number is that the Chinese patent (patent documentation 3) of CN1865775 has provided a kind of composite circulating fluidized bed system that is used for high performance clean burning of urban domestic garbage, wherein, employing is intensive with the edge, the sparse mode in center is arranged the taper air distribution plate of blast cap, furnace wall water-cooling wall middle part is 27-33 ° isosceles triangular structure waisting water-cooling wall for the base angle, waisting water-cooling wall top is provided with the circulation of concave shape material particles and strengthens plate, above plate is strengthened in the circulation of concave shape material particles, adopt the mode of corner tangential firing to arrange secondary wind, the High Temperature Gas solid separator is set the exit topmost at the fluid bed burner hearth.
What the recirculating fluidized bed of patent documentation 1 adopted is the rectangle furnace structure, what the bubbling fluidized bed of patent documentation 2 adopted is the spherical hearth structure, furnace diameter is constant in the above-below direction gamut, because refuse thermal value is generally lower, so these two kinds of chamber structures are unfavorable for the accumulation of heat of emulsion zone bed and the after-flame of bulky grain rubbish.
At this point, in the system of patent documentation 3, utilize waisting water-cooling wall, taper air distribution plate and material particles circulation to strengthen the effect of plate, form the interior circulation of particle, and, the secondary wind that utilizes the quadrangle tangential circle mode to arrange strengthens the turbulent flow in the stove, prolongs the time of contact of particle and oxygen.But the problem that this technology exists is that the waisting water-cooling wall of isosceles triangular structure causes easily the furnace wall being produced wearing and tearing.Simultaneously, in order to circulate in the particle of realizing optimum efficiency, needing the waisting water-cooling wall to cooperate with the taper air distribution plate, is that the special blast cap that the edge is intensive, the center is sparse is arranged and the taper air distribution plate adopts, and this has increased the difficulty that air distribution plate is made.
The utility model content
The purpose of this utility model is to overcome above-mentioned deficiency of the prior art, in the incinerator and CIU that adopt structure burner hearth with a tight waist, promotes the after-flame of rubbish, improves stove internal combustion efficient, reduces the generation and the discharging of pollutant.
And then the purpose of this utility model also is, in the incinerator and CIU of the burner hearth that adopts structure with a tight waist, reduces the wearing and tearing to burner hearth limit wall.
Above-mentioned purpose is achieved through the following technical solutions.
First aspect of the present utility model is a kind of fluidized bed incinerator, bottom at burner hearth is provided with air distribution plate, be provided with wind inlet and slag-drip opening at the downside of this air distribution plate, the middle part of burner hearth is structural portion with a tight waist, top at burner hearth is provided with outlet, it is characterized in that the lower furnace portion that links to each other with described bottom is the flaring structural portion.
According to this technical scheme, by the burner hearth structural portion three's with a tight waist of the burner hearth flaring structural portion of the air distribution plate of burner hearth bottom, emulsion zone and transition region comprehensive function, circulation in emulsion zone forms two.On the one hand, material particles rises along section of burner hearth under the drive of air distribution plate air, and the particle of close flaring burner hearth limit wall is fallen along the limit wall by the influence of cross sectional shape, forms a particle inner cyclic process.Rising particle is influenced by cross sectional shape after arriving structure with a tight waist, a large amount of particles compile at this, and bump, the particle that a part is bigger falls along the limit wall after colliding because speed is less, also participate in the circulation, in emulsion zone has formed a bigger particle, circulate like this.The existence of two interior circulations of particle helps strengthening the accumulation of heat of burner hearth emulsion zone, thereby helps the after-flame of bulky grain and difficult combustion particle, the generation and the discharging of minimizing pollutant.
Preferably, the flaring angle of described flaring structural portion is in the scope of 70 to 80 degree.
Reach best by choosing the angle in this scope, can make the effect of utilizing the flaring inwall that particle is fallen.
Preferably, described air distribution plate is made of the even air distribution plate of arranging of blast cap.
Like this, needn't adopt patent documentation 3 described such special air distribution plates, can reduce the manufacture difficulty of air distribution plate, and then reduce the manufacturing cost of incinerator integral body.
Preferably, described structural portion with a tight waist is a circular arc.
By adopting the structural portion with a tight waist of circular arc, compare with the waisting water-cooling wall of the such isosceles triangular structure of patent documentation 3, can reduce the wearing and tearing of this structural portion with a tight waist.
Preferably, adopt between described structural portion with a tight waist and the adjacent burner hearth wall and seamlessly transit.
Like this, can reduce the limit wall wearing and tearing of intersection between structural portion with a tight waist and the adjacent burner hearth wall.
Preferably, above described structural portion with a tight waist, be provided with overfiren air port.
Secondary wind has been brought sufficient oxygen into, the completing combustion of the particle that helps rising.
Preferably, be provided with a plurality of described overfiren air ports, a plurality of overfiren air ports are arranged on the front-back wall of burner hearth symmetrically, and towards burner hearth inside with the equal angular tiltedly opening that dips down.
Like this, this layout of overfiren air port can be strengthened the turbulent flow in the stove, helps improving the time of staying of rubbish in stove, promotes the after-flame of firing-difficult matter.And then, because overfiren air port is towards oblique lower opening, so can prevent to pour into the air port along the particle that burner hearth limit wall falls.
Second aspect of the present utility model is a kind of circulating fluidized bed incinerator, comprising: the returning charge mechanism of above-mentioned fluidized bed incinerator, the gas-solid separator that links to each other with the furnace outlet of this fluidized bed incinerator and bottom that links this gas-solid separator and burner hearth.
The third aspect of the present utility model is an a kind of fluidized combustion system, comprise: above-mentioned fluidized bed incinerator and the flue that links to each other with the outlet of fluidized bed incinerator are disposed with afterbody heat-transfer surface, gas cleaning part and flue gas ash removal part from the upstream in this flue.
Fourth aspect of the present utility model is a kind of recirculating fluidized bed CIU, comprising: above-mentioned circulating fluidized bed incinerator and the flue that links to each other with the top of described gas-solid separator, be disposed with afterbody heat-transfer surface, gas cleaning part and flue gas ash removal part from the upstream in flue.
These circulating fluidized bed incinerators, fluidized combustion system and recirculating fluidized bed CIU also can obtain the technique effect same with above-mentioned fluidized bed incinerator.
Description of drawings
Fig. 1 is the summary construction diagram of recirculating fluidized bed CIU of the present utility model.
The specific embodiment
Below, in conjunction with the accompanying drawings the utility model is described in detail.
Fig. 1 integral body shows the recirculating fluidized bed CIU.The left part of system is a fluidized bed incinerator.
This fluidized bed incinerator is provided with the air distribution plate 3 that blast cap is evenly arranged in the bottom of burner hearth, be provided with wind inlet 1 and slag-drip opening 2 at the downside of this air distribution plate 3, is provided with outlet at the top of burner hearth.
And the lower furnace portion that links to each other with this bottom partly is made as flaring structural portion 4, and the flaring angle is in the scope of 70 to 80 degree.The middle part of burner hearth makes structural portion 5 with a tight waist, and this structural portion 5 with a tight waist is circular arc, and arc angle can be determined according to the burner hearth situation.And, adopt between this structural portion 5 with a tight waist and the adjacent burner hearth wall to seamlessly transit, for example with arc transition.
And then, above structural portion 5 with a tight waist, be provided with overfiren air port 6.Be provided with a plurality of overfiren air ports 6 in the present embodiment, and each overfiren air port 6 is arranged in symmetrically on the front-back wall of burner hearth, so can be called the overfiren air port that liquidates again.In the present embodiment, each overfiren air port 6 tiltedly opening that dips down a little in the burner hearth prevents to pour in the air port along the particle that burner hearth limit wall falls thus.The angle of inclination of each overfiren air port 6 can be set as basic identical.
When burning, be blown into air from wind inlet 1 of air distribution plate 3 downsides, air is evenly guided by the blast cap of air distribution plate 3.The updraft that passes air distribution plate 3 drives particle and rises, and in uphill process, a part of material particles can fall at the effect lower edge of gravity and wall effect wall and burn once more.In addition, because lower furnace portion is designed to flaring structural portion 4, so can promote the whereabouts of thick particle along burner hearth limit wall.All the other particles further rise to structural portion 5 with a tight waist, because the cross sectional shape effect of structural portion 5 with a tight waist, medium size particles falls along inwall after this gathers and bumps.Tiny particle then passes structural portion 5 with a tight waist and further rises.Above this structural portion 5 with a tight waist, be provided with overfiren air port 6, the air-flow that is blown into from this overfiren air port 6 drives the particle rising, brings sufficient oxygen simultaneously, has strengthened the oxygen concentration of burner hearth middle and upper part, and strengthened the interior turbulent flow of stove and mixed, thereby promote the particle after-flame.
By the gas-solid separator 7 and the returning charge mechanism 8 of mating with above-mentioned fluidized bed incinerator is set, just can constitute circulating fluidized bed incinerator.Wherein, gas-solid separator 7 links to each other with the furnace outlet of this fluidized bed incinerator, for example can adopt high temperature or water-cooled/vapour cold junction structure cyclone separator.Returning charge mechanism 8 is communicated to burner hearth with the bottom of gas-solid separator 7.
Particle after fully burning in burner hearth enters gas-solid separator 7 from the outlet of roof of the furnace.In this gas-solid separator 7, the particle that carries in the air-flow overwhelming majority is separated and collect the bottom, and turns back in the burner hearth stove through returning charge mechanism 8 and to burn once more.The high-temperature flue gas of isolating behind most particles then is discharged in the flue 9 that is connected gas-solid separator 7 tops.
Be provided with afterbody heat-transfer surface 10 in flue 9, this afterbody heat-transfer surface 10 is made up of waste heat boiler or high temperature superheater, low temperature superheater, economizer, air preheater etc.High-temperature flue gas obtains cooling from these afterbody heat-transfer surface 10 processes.Cooled smoke is flowed through and is arranged on the gas cleaning part 11 in afterbody heat-transfer surface 10 downstreams, accepts purified treatment such as desulfurization, denitration in this gas cleaning part 11.Flue gas after being purified further by the flue gas ash removal part 12 in downstream, is discharged into atmosphere through after the dedusting.
On the other hand, in burner hearth, discharge by slag-drip opening 2 through the remaining noncombustibles in the back of fully burning.
Situation to the recirculating fluidized bed CIU is illustrated above, but also can save gas-solid separator 7 and returning charge mechanism 8 and formation fluidized combustion system from said system.That is, directly connect flue 9 at the top exit of fluidized bed incinerator, and in this flue 9, back-end surfaces 10 is set, gas cleaning part 11, flue gas ash removal part 12.
Claims (10)
1. a fluidized bed incinerator is provided with air distribution plate (3) in the bottom of burner hearth, is provided with wind inlet (1) and slag-drip opening (2) one time at the downside of this air distribution plate (3), the middle part of burner hearth is structural portion (5) with a tight waist, top at burner hearth is provided with outlet, it is characterized in that
The lower furnace portion that links to each other with described bottom is flaring structural portion (4).
2. fluidized bed incinerator as claimed in claim 1 is characterized in that, the flaring angle of described flaring structural portion (4) is in the scope of 70 to 80 degree.
3. fluidized bed incinerator as claimed in claim 1 is characterized in that, the air distribution plate that described air distribution plate (3) is evenly arranged by blast cap constitutes.
4. fluidized bed incinerator as claimed in claim 1 is characterized in that, described structural portion with a tight waist (5) is a circular arc.
5. fluidized bed incinerator as claimed in claim 1 is characterized in that, adopts between described structural portion with a tight waist (5) and the adjacent burner hearth wall to seamlessly transit.
6. fluidized bed incinerator as claimed in claim 1 is characterized in that, is provided with overfiren air port (6) in the top of described structural portion with a tight waist (5).
7. fluidized bed incinerator as claimed in claim 6 is characterized in that, is provided with a plurality of described overfiren air ports (6), and a plurality of overfiren air ports (6) are arranged on the front-back wall of burner hearth symmetrically, and towards burner hearth inside with the equal angular tiltedly opening that dips down.
8. a circulating fluidized bed incinerator comprises: the returning charge mechanism (8) of each described fluidized bed incinerator, the gas-solid separator (7) that links to each other with the furnace outlet of this fluidized bed incinerator and bottom that links this gas-solid separator (7) and burner hearth in the claim 1 to 7.
9. fluidized combustion system, comprise: each described fluidized bed incinerator and the flue (9) that links to each other with the furnace outlet of fluidized bed incinerator in the claim 1 to 7 are disposed with afterbody heat-transfer surface (10), gas cleaning part (11) and flue gas ash removal part (12) from the upstream in this flue (9).
10. recirculating fluidized bed CIU comprises: described circulating fluidized bed incinerator of claim 8 and the flue (9) that links to each other with the top of described gas-solid separator (7), be disposed with afterbody heat-transfer surface (10), gas cleaning part (11) and flue gas ash removal part (12) from the upstream in flue (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201089826U CN201281345Y (en) | 2008-07-01 | 2008-07-01 | Fluidized bed incinerator, circulating fluidized bed incinerator and incineration system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201089826U CN201281345Y (en) | 2008-07-01 | 2008-07-01 | Fluidized bed incinerator, circulating fluidized bed incinerator and incineration system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201281345Y true CN201281345Y (en) | 2009-07-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201089826U Expired - Lifetime CN201281345Y (en) | 2008-07-01 | 2008-07-01 | Fluidized bed incinerator, circulating fluidized bed incinerator and incineration system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201281345Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102022723A (en) * | 2010-12-31 | 2011-04-20 | 东莞理文造纸厂有限公司 | Circulating fluidized bed boiler for papermaking thermal power plant |
| CN107860025A (en) * | 2017-10-20 | 2018-03-30 | 周琼 | High-efficiency biomass burning furnace |
-
2008
- 2008-07-01 CN CNU2008201089826U patent/CN201281345Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102022723A (en) * | 2010-12-31 | 2011-04-20 | 东莞理文造纸厂有限公司 | Circulating fluidized bed boiler for papermaking thermal power plant |
| CN107860025A (en) * | 2017-10-20 | 2018-03-30 | 周琼 | High-efficiency biomass burning furnace |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090729 |