CN204574016U - The isobaric air compartment of a kind of both sides air inlet - Google Patents
The isobaric air compartment of a kind of both sides air inlet Download PDFInfo
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- CN204574016U CN204574016U CN201520057592.0U CN201520057592U CN204574016U CN 204574016 U CN204574016 U CN 204574016U CN 201520057592 U CN201520057592 U CN 201520057592U CN 204574016 U CN204574016 U CN 204574016U
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Abstract
The utility model discloses the isobaric air compartment of a kind of both sides air inlet, the left and right sides of air compartment is the air inlet protruded, and the left and right sides of air compartment bottom surface is toward middle part inclination, middle part toward indent; Above air inlet, the sidewall of air compartment is toward air compartment inner inclination, forms enlarging; Above enlarging, the sidewall of air compartment is straightway.The isobaric air compartment of the utility model both sides air inlet adopts the shape of falling M structure, both sides air intake, solves and distributes along the air pressure of furnace chamber width, air mass flow the bed temperature deviation and goods fluid problem of non-uniform that inequality brings.
Description
Technical field
The utility model relates to a kind of air compartment, particularly relates to the isobaric air compartment of a kind of both sides air inlet, belongs to Sector of Cfb Boilers.
Background technology
Recirculating fluidized bed (CFB) combustion technology is a kind of novel clean coal combustion technology, and its main feature is fuel burning in fluidisation state in burner hearth.Fuel sends into burner hearth by coal feeder, takes burner hearth bottom out of and carry out Matter Transfer under the First air effect of high pressure, participates in burning and heat transfer in cyclic process.Along with the maximization of CFBB, boiler furnace section also increases thereupon, the uniformity of high pressure First air on air distribution plate cross section can worse and worse, and assignment of traffic difference increases, and has a huge impact the important operation characteristic such as Matter Transfer, air capacity distribution, bed temperature distribution of boiler.
In existing engineer applied, the general employing arrangement of both sides air inlet or the arrangement of rear side air intake, its arrangement of features all respectively has superiority-inferiority.
The air compartment of both sides air inlet is arranged on the both sides of burner hearth, and air compartment and burner hearth form n shape.The mode of this both sides air inlet often all has certain difference along the both sides of furnace chamber width and middle air quantity, wind speed, dynamic pressure etc., certain restrictive function is had to fluidized-bed combustion boiler maximization development, but slag-draining device can be evenly arranged along boiler width direction by this arrangement, avoids the dead band that there is deslagging.
In addition, the mode of rear side air intake is adopted, because one or two air compartment is from rear side air intake, its fluidized wind stroke is shorter, and above-mentioned measures of dispersion can not be obvious especially, but limits due to its structure, can only arrange slag-draining device in the boiler left and right sides, this has considerable influence for boiler slag removal.
Therefore, the needs of structure based layout and actual motion, are necessary to propose the isobaric air compartment of a kind of both sides air inlet, to solve the needs of cloth wind and deslagging simultaneously.
As: the application number of Chinese Academy of Sciences's application is 201010207341.8, denomination of invention is the Chinese invention patent of " a kind of CFBB First air air distribution method ", wherein: boiler hearth of circulating fluidized bed air distribution plate is made up of at least two adjacent, rectangular cloth aerofoil subregions, an air compartment is respectively equipped with below each air distribution plate subregion, not connected between air compartment; Each air compartment is all connected with the air preheater of boiler by airduct, and First air passes into air compartment from air compartment side; The airduct be connected with each air compartment is equipped with air-flow measurement device and adjusting device; During boiler operatiopn, the air flow adjusting apparatus described in adjustment, to control the First air air quantity flowing into each air compartment.Be a kind of by two independently isobaric air compartment form, its essence is a kind of air compartment of single admission.
As: the application number of Shanghai Furnace Factory Co., Ltd's application is 201010272758.2, denomination of invention is the Chinese invention patent of " CFBB First air air intake equipment ", wherein: described primary air intake pipe road has more than two, diverging duct quantity is identical with primary air intake pipe road quantity, described diverging duct is arranged along First air chamber width direction, and described primary air intake pipe is managed along the First air air intake mother that oppositely converges in air intake direction.Be a kind of rear air intake arrangement, its essence is also a kind of air compartment of single admission.
Utility model content
The purpose of this utility model is: provide a kind of both sides air inlet isobaric air compartment, boiler air compartment is composed in parallel by one or more similar isobaric air compartment, solve the problem that both sides air intake cloth wind is uneven, thus overcome exist at existing air compartment bed temperature skewness, goods fluid inequality problem.
The purpose of this utility model is realized by following technical proposals: the isobaric air compartment of a kind of both sides air inlet, and the left and right sides of air compartment is the air inlet protruded, and the left and right sides of air compartment bottom surface is toward middle part inclination, middle part toward indent; Above air inlet, the sidewall of air compartment is toward air compartment inner inclination, forms enlarging; Above enlarging, the sidewall of air compartment is straightway.
As preferred embodiment, the angle of inclination of described air compartment is β, 30 ° >=β >=5 °.
As preferred embodiment, the gradient of described enlarging is α, 80 ° >=α >=10 °.
As preferred embodiment, the length of described straightway is d, d >=0m.
As preferred embodiment, described air compartment comprises symmetrically arranged left air compartment and right air compartment, and left air compartment and right air compartment are interconnected, and left air compartment is provided with left side air inlet, and right air compartment is provided with right side air inlet, toward indent in the middle part of air compartment, forms the shape of falling M structure.
As preferred embodiment, boiler comprises burner hearth, air distribution plate and air compartment, and described burner hearth is arranged at the top of air distribution plate, and air compartment is arranged at the below of air distribution plate, and described air distribution plate comprises blast cap and fin panel casing, and air distribution plate is as the end face of air compartment; Described air distribution plate comprises blast cap and fin panel casing, and air distribution plate is as the end face of air compartment.
As further preferred embodiment, the surrounding of air compartment and bottom form by fin panel casing is bending, and the inner surface of air compartment lays Fire and abrasion resistant material layer.
In the utility model:
Inclination angle: object makes whole air compartment even along the pressure distribution of furnace chamber width, distribute along the air mass flow in furnace chamber width with equilibrium, the scope of β is generally 5 ~ 30 ° time, and whole air compartment is best along the pressure distribution of furnace chamber width, air mass flow distributed uniform.
Inclination enlarging and straightway: isobaric air compartment left and right sides entrance contains inclination enlarging α and straight section d, to weaken the eddy current because entrance section difference causes, make more even near air compartment entrance area flow field, make vortex away from air distribution plate simultaneously, weaken eddy current to the adverse effect of air distribution plate cloth wind.
Compared with prior art, the beneficial effects of the utility model: the isobaric air compartment of the utility model both sides air inlet adopts the shape of falling M structure, both sides air intake, solves and distributes the uneven bed temperature deviation that brings and goods fluid problem of non-uniform along the air pressure of furnace chamber width, air mass flow.
Accompanying drawing explanation
Structural representation when Fig. 1 is single isobaric air compartment application.
Fig. 2 is the top view of Fig. 1.
Fig. 3 is the structure top view of multiple isobaric air compartment parallel connection.
In figure: 1-burner hearth, 2-air distribution plate, 3-air compartment, air inlet on the left of 4-, air inlet on the right side of 5-, 6-enlarging, 7-straightway.
Detailed description of the invention
Below in conjunction with specific embodiment, the utility model is further described.
All features disclosed in this description, or the step in disclosed all methods or process, except the speciality mutually repelled and/or step, all can combine by any way, unless specifically stated otherwise, all can be replaced by other equivalences or the alternative features with similar object, namely, unless specifically stated otherwise, an embodiment in a series of equivalence of each feature or similar characteristics.
As shown in Figure 1, 2, a kind of isobaric air compartment is the CFBB of both sides air intake, it comprises burner hearth 1, air distribution plate 2, air compartment 3, and unshowned cyclone separator, tail vertical well, ignition air duct in Fig. 1, the annex composition of material returning device, dreg removing system, steam-water separator drum, each heating surface and necessity.Described burner hearth 1 is arranged at the top of air distribution plate 2, and air compartment 3 is arranged at the below of air distribution plate 2, and described air distribution plate 2 comprises blast cap and fin panel casing, and air distribution plate 2 is as the end face of air compartment 3; The surrounding of air compartment 3 and bottom form by fin panel casing is bending, and the inner surface of air compartment 3 lays Fire and abrasion resistant material layer.
Wherein: the left and right sides of the isobaric air compartment of the utility model both sides air inlet is the air inlet protruded, the left and right sides of air compartment 3 bottom surface is toward middle part inclination, middle part toward indent; The angle of inclination of described air compartment 3 is β, 30 ° >=β >=5 °, in the present embodiment, and β=15 °.Specifically, described air compartment comprises symmetrically arranged left air compartment and right air compartment, left air compartment and right air compartment are interconnected, left air compartment is provided with left side air inlet 4, right air compartment is provided with right side air inlet 5, and toward indent in the middle part of air compartment, and left side air inlet 4 and right side air inlet 5 are the structure toward both sides projection, therefore, whole air compartment is made to form the structure of the shape of falling M.Above air inlet, the sidewall of air compartment 3 is toward air compartment inner inclination, forms enlarging 6; The gradient of described enlarging 6 is α, 80 ° >=α >=10 °, in the present embodiment, and α=25 °.Above enlarging 6, the sidewall of air compartment 3 is straightway 7; The length of described straightway 7 is d, d=1.5m.
As described in Figure 3, along furnace depth direction, arrange the isobaric air compartment of multiple shape of falling M as required, multiple air compartment 2 adopts parallel connection.The parallel-connection structure of this example 3 isobaric air compartments, each isobaric air compartment two side entrance is equipped with air quantity and reconciles baffle plate, in actual motion, can adjust as required along the allocation of the amount of air ratio before, during and after furnace depth direction.
Workflow of the present utility model:
CFBB adopts the isobaric air compartment of the utility model both sides air intake, and fuel feeds from stokehold, rear wall deslagging.First air pressure-air enters isobaric air compartment by burner hearth bottom both sides after air preheater, because the isobaric air compartment of both sides air inlet adopts the shape of falling M structure, both sides air intake, solves and distributes the uneven bed temperature deviation that brings and goods fluid problem of non-uniform along the air pressure of furnace chamber width, air mass flow.The high-temperature flue gas produced in burner hearth brings the particles such as the fuel in burner hearth into cyclone separator, sends burner hearth back to burn away and circulate after the separated device of larger particle catches by material returning device, and thinner particle enters tail vertical well with flue gas to be continued to participate in heat exchange.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection domain of the present utility model.
Claims (6)
1. the isobaric air compartment of both sides air inlet, is characterized in that: the left and right sides of air compartment (3) is the air inlet protruded, the left and right sides of air compartment (3) bottom surface is toward middle part inclination, middle part toward indent; Above air inlet, the sidewall of air compartment (3) is toward air compartment inner inclination, forms enlarging (6); The sidewall of enlarging (6) top air compartment (3) is straightway (7).
2. the isobaric air compartment of both sides air inlet as claimed in claim 1, is characterized in that: the angle of inclination of described air compartment (3) is β, 30 ° >=β >=5 °.
3. the isobaric air compartment of both sides air inlet as claimed in claim 1, is characterized in that: the gradient of described enlarging (6) is α, 80 ° >=α >=10 °.
4. the isobaric air compartment of both sides air inlet as claimed in claim 1, it is characterized in that: described air compartment comprises symmetrically arranged left air compartment and right air compartment, left air compartment and right air compartment are interconnected, left air compartment is provided with left side air inlet (4), right air compartment is provided with right side air inlet (5), toward indent in the middle part of air compartment, form the shape of falling M structure.
5. the isobaric air compartment of both sides air inlet as claimed in claim 1, it is characterized in that: boiler comprises burner hearth (1), air distribution plate (2) and air compartment (3), described burner hearth (1) is arranged at the top of air distribution plate (2), air compartment (3) is arranged at the below of air distribution plate (2), described air distribution plate (2) comprises blast cap and fin panel casing, and air distribution plate (2) is as the end face of air compartment (3).
6. the isobaric air compartment of both sides air inlet as claimed in claim 5, is characterized in that: the surrounding of air compartment (3) and bottom form by fin panel casing is bending, and the inner surface of air compartment (3) lays Fire and abrasion resistant material layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520057592.0U CN204574016U (en) | 2015-01-28 | 2015-01-28 | The isobaric air compartment of a kind of both sides air inlet |
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| CN201520057592.0U CN204574016U (en) | 2015-01-28 | 2015-01-28 | The isobaric air compartment of a kind of both sides air inlet |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017206430A1 (en) * | 2016-05-30 | 2017-12-07 | 广东工业大学 | Circulating fluidized bed combustion system with uniform air distribution device |
| CN110017463A (en) * | 2019-04-16 | 2019-07-16 | 武汉市新荣锅炉制造有限公司 | A kind of closed isobaric air compartment water pipe steam boiler |
-
2015
- 2015-01-28 CN CN201520057592.0U patent/CN204574016U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017206430A1 (en) * | 2016-05-30 | 2017-12-07 | 广东工业大学 | Circulating fluidized bed combustion system with uniform air distribution device |
| US10174936B2 (en) | 2016-05-30 | 2019-01-08 | Guangdong University Of Technology | Circular fluidizing bed combustion system with uniform airflow distributing device |
| CN110017463A (en) * | 2019-04-16 | 2019-07-16 | 武汉市新荣锅炉制造有限公司 | A kind of closed isobaric air compartment water pipe steam boiler |
| CN110017463B (en) * | 2019-04-16 | 2020-09-01 | 武汉市新荣锅炉制造有限公司 | Water pipe steam boiler with closed isobaric air chamber |
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