CN202675302U - Pure firing garbage circulating fluidized bed boiler - Google Patents
Pure firing garbage circulating fluidized bed boiler Download PDFInfo
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- CN202675302U CN202675302U CN 201220336956 CN201220336956U CN202675302U CN 202675302 U CN202675302 U CN 202675302U CN 201220336956 CN201220336956 CN 201220336956 CN 201220336956 U CN201220336956 U CN 201220336956U CN 202675302 U CN202675302 U CN 202675302U
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Abstract
The utility model relates to a pure firing garbage circulating fluidized bed boiler which comprises a fully-adiabatic water-cooled wall hearth, a separator, a descending flue, an ascending flue, a convection heated surface, air pre-heaters and a coal economizer; the fully-adiabatic water-cooled wall hearth and the separator are connected through a pipeline, and the descending flue and the ascending flue are arranged behind the separator; the convection heated surface is arranged in the ascending flue, and the air pre-heaters and the coal economizer are arranged in a vertical shaft flue behind the ascending flue; and the air pre-heaters are arranged on and under the coal economizer in two stages. The pure firing garbage circulating fluidized bed boiler has the advantages that (1) garbage can be stably lighted and burned under the working conditions of the pure firing garbage; (2) fire-proof and wear-resistant casting is laid in a full-hearth, and the service life is prolonged; (3) the air pre-heaters are arranged in two stages, so that the temperature of hot air which enters the boiler is increased, and the pure firing of the garbage is ensured; (4) the horizontal pitch of the convection heated surface is increased, the flow rate of flue gas is reduced, and the wear of the heated surface is reduced; and (5) due to a multi-channel structure, the wear of the heated surface at the tail is reduced.
Description
Technical field
The utility model is a kind of novel refuse incinerator of circulating fluid bed, belongs to the CFBB field.
Background technology
Along with improving constantly of growth, expanding economy and the resident living level of China's urban population, Municipal Domestic Garbage Output increases rapidly year by year.According to statistics, the annual production of China's domestic waste is up to more than 1.7 hundred million tons, and every year is with about 10% speed increase.But the handling rate less than 1/3 of present China domestic waste, the ratio that really reaches harmless treatment and recycling is lower, and the house refuse that grows with each passing day has become the significant problem of puzzlement economic development and environmental improvement.
At present, domestic the most effective and most economical rational trash processing way is waste incineration and generating electricity.At present China's be used for burning away the refuse boiler of generating mainly contains grate furnace and CFBB.Because technical reason, present stage the fire grate technology of grate furnace be foreign technology, investment cost and operating cost are high, general city is difficult to bear.And Technology of Circulating Fluidized Bed Boiler develops rapidly these years, and, low NOx combustion wide with its suitability of fuel and efficient desulfuration in furnace are applied to widely field.
Because China's domestic waste has the characteristics such as water content is high, calorific value is low, complicated component is changeable.Therefore, in order to guarantee the smooth combustion of boiler, generally all need to mix the coal that burns a part of high heating value.In today of coal resources growing tension, mix and burn the reduction that coal namely means economic benefit.The art of this patent just is being based on that this develops a kind of novel CFBB that can pure combustion rubbish.
Chinese utility model patent 2010201473870 is used for the CFBB of waste incineration, and this patent not combustion chamber described in this patent is not full insulated design, can not improve the burning indoor temperature, thereby can not guarantee garbage energy stable ignition and burning; Described air preheater does not divide two stage arrangement, only is provided with air preheater below economizer, can not further improve into the stove hot blast temperature, can not guarantee that garbage pure burns; The transverse pitch of described superheater does not increase, and does not reduce flue gas flow rate, can not alleviate the wearing and tearing of heating surface.
Summary of the invention
The purpose of this utility model is to provide a kind of reasonable in design, heated face structure and boiler wind speed adjustment connection and reasonable arrangement, the boiler continuous operating time prolongs, operating cost is low pure combustion recycle fluidized-bed combustion boiler of according with.
It is that this pure combustion recycle fluidized-bed combustion boiler comprises complete adiabatic water-evaporating furnace, separator, downward-flow flue, uptake flue, convection heating surface, air preheater and economizer that the utility model solves the problems of the technologies described above the technical scheme that adopts; Complete adiabatic water-evaporating furnace is connected pipeline with separator and connects, and is provided with downward-flow flue and uptake flue behind the separator; Be provided with convection heating surface in the uptake flue, be provided with air preheater and economizer in the vertical well gas flue behind the uptake flue; Described air preheater divides two stage arrangement about economizer.Full adiabatic furnace improves fire box temperature, and air preheater divides two stage arrangement, improves to enter the stove hot blast temperature, guarantees that garbage pure burns.
Be laid with the fire-resistant abrasion-proof castable in the complete adiabatic water-evaporating furnace described in the utility model.Isolated water-cooling wall pipe of burner hearth directly contacts with flue gas.
The transverse pitch of convection heating surface described in the utility model is 20 centimetres.Strengthen the convection heating surface transverse pitch, reduce flue gas flow rate, the wearing and tearing that alleviate heating surface.
Downward-flow flue described in the utility model and uptake flue are comprised of fin panel casing.
The utility model is compared with original technology, has the following advantage that has: 1, garbage energy stable ignition and burning under the pure combustion rubbish operating mode, and 2, full burner hearth lays the fire-resistant abrasion-proof castable, avoids transducer wall ' s abrasion, increase the service life; 3, air preheater divides two stage arrangement, improves to enter the stove hot blast temperature, guarantees that garbage pure burns; 4, strengthen the convection heating surface transverse pitch, reduce flue gas flow rate, the wearing and tearing that alleviate heating surface; 5, multi-channel type structure, the dust in the further sedimentation flue gas, the wearing and tearing that alleviate back-end surfaces; 6, the utility model can day disposal of refuse amount more than 600 tons.
Description of drawings
Fig. 1 is the utility model overall structure schematic diagram.
Label declaration: complete adiabatic water-evaporating furnace 1, separator 2, downward-flow flue 3, uptake flue 4, convection heating surface 5, air preheater 6, economizer 7.
The specific embodiment
Below in conjunction with embodiment the utility model is described in further detail, following examples are to explanation of the present utility model and the utility model is not limited to following examples.
Embodiment 1: as shown in Figure 1, the utility model comprises complete adiabatic water-evaporating furnace 1, separator 2, downward-flow flue 3, uptake flue 4, convection heating surface 5, air preheater 6, economizer 7.
In the present embodiment, boiler is medium temperature and medium pressure parameter boiler (nominal steam pressure 3.82MPa, nominal steam temperature 450 degree), feed temperature 150 degree, and rubbish is that calorific value is the pure combustion rubbish of 950 kcal/kg.The transverse pitch of described convection heating surface 5 is increased to 20 centimetres, and described convection heating surface 5 is by being successively from the bottom up one group of high temperature superheater, one group of medium temperature overheater, two groups of low temperature superheaters and one group of evaporimeter; The bobbin carriage backhaul number of air preheater 6 is respectively four backhauls and three backhauls up and down, and economizer 7 is provided with three.
During operation, fuel rubbish at first in complete adiabatic water-evaporating furnace 1 burning generate high-temperature flue gas, adiabatic furnace wall cooling helps catching fire of rubbish and smooth combustion, in the fire-resistant abrasion-proof castable protection water-cooling wall pipe that lays be not worn.Carrying secretly and entering into separator 2 after the high-temperature flue gas of dust granules leaves complete adiabatic water-evaporating furnace 1 in a large number, flue gas is separated with dust granule in separator 2, flue gas after the separation enters into downward-flow flue 3, dust in downward-flow flue 3 in the flue gas is further settled down, enter into uptake flue 4 than clean flue gas after the sedimentation, and by being arranged in convection heating surface 5 in the uptake flue 4 to its heat release.Air preheater 6 and economizer 7 that flue gas enters afterbody at last carry out heat exchange, and air preheater 6 adopts two stage arrangement, thereby the hot blast that produces higher temperature burns to offer rubbish.
Technical characteristics of the present utility model is that complete adiabatic water-evaporating furnace 1, air preheater 6 minutes two stage arrangement, convection heating surface 5 transverse pitches strengthen and the multi-channel type structure.The utility model can day disposal of refuse amount more than 600 tons.
The complete adiabatic water-evaporating furnace 1 of the utility model improves fire box temperature, garbage energy stable ignition and burning under the pure combustion rubbish operating mode; Full burner hearth lays the fire-resistant abrasion-proof castable, and isolated water-cooling wall pipe of burner hearth directly contacts with flue gas, avoids transducer wall ' s abrasion, prolongs physical life; 6 minutes two stage arrangement of air preheater, raising enters the stove hot blast temperature, guarantees that garbage pure burns; Strengthen convection heating surface horizontal stroke 5 to pitch, reduce flue gas flow rate, the wearing and tearing that alleviate heating surface.
Boiler forms first passage by complete adiabatic water-evaporating furnace 1, and separator 2 forms second channel, and downward-flow flue 3 forms third channel, and uptake flue 4 and the convection heating surface 5 that is arranged in wherein form four-way, and air preheater 6 and economizer 7 form Five-channel.The multi-channel type structure, the dust in the further sedimentation flue gas, the wearing and tearing that alleviate back-end surfaces.
In addition, need to prove, the specific embodiment described in this specification, the shape of its parts and components, institute's title of being named etc. can be different.Allly conceive equivalence or the simple change that described structure, feature and principle are done according to the utility model patent, be included in the protection domain of the utility model patent.The utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment; only otherwise depart from structure of the present utility model or surmount this scope as defined in the claims, all should belong to protection domain of the present utility model.
Claims (4)
1. a pure combustion recycle fluidized-bed combustion boiler is characterized in that: comprise complete adiabatic water-evaporating furnace, separator, downward-flow flue, uptake flue, convection heating surface, air preheater and economizer; Complete adiabatic water-evaporating furnace is connected pipeline with separator and connects, and is provided with downward-flow flue and uptake flue behind the separator; Be provided with convection heating surface in the uptake flue, be provided with air preheater and economizer in the vertical well gas flue behind the uptake flue; Described air preheater divides two stage arrangement about economizer.
2. pure combustion recycle fluidized-bed combustion boiler according to claim 1 is characterized in that: be laid with the fire-resistant abrasion-proof castable in the described complete adiabatic water-evaporating furnace.
3. pure combustion recycle fluidized-bed combustion boiler according to claim 1 and 2, it is characterized in that: the transverse pitch of described convection heating surface is 20 centimetres.
4. pure combustion recycle fluidized-bed combustion boiler according to claim 3, it is characterized in that: described downward-flow flue and uptake flue are comprised of fin panel casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220336956 CN202675302U (en) | 2012-07-12 | 2012-07-12 | Pure firing garbage circulating fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220336956 CN202675302U (en) | 2012-07-12 | 2012-07-12 | Pure firing garbage circulating fluidized bed boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202675302U true CN202675302U (en) | 2013-01-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220336956 Expired - Fee Related CN202675302U (en) | 2012-07-12 | 2012-07-12 | Pure firing garbage circulating fluidized bed boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202675302U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748762A (en) * | 2012-07-12 | 2012-10-24 | 杭州海陆重工有限公司 | Post-ignition garbage circulating fluidized bed boiler |
| CN109185892A (en) * | 2018-10-11 | 2019-01-11 | 无锡华光锅炉股份有限公司 | A kind of recirculating fluidized bed garbage fired boiler structure |
-
2012
- 2012-07-12 CN CN 201220336956 patent/CN202675302U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748762A (en) * | 2012-07-12 | 2012-10-24 | 杭州海陆重工有限公司 | Post-ignition garbage circulating fluidized bed boiler |
| CN109185892A (en) * | 2018-10-11 | 2019-01-11 | 无锡华光锅炉股份有限公司 | A kind of recirculating fluidized bed garbage fired boiler structure |
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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: 20130116 Termination date: 20150712 |
|
| EXPY | Termination of patent right or utility model |