CN206112911U - Supercritical cycle fluidized bed boiler furnace square waveform mid -board - Google Patents
Supercritical cycle fluidized bed boiler furnace square waveform mid -board Download PDFInfo
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- CN206112911U CN206112911U CN201620995755.4U CN201620995755U CN206112911U CN 206112911 U CN206112911 U CN 206112911U CN 201620995755 U CN201620995755 U CN 201620995755U CN 206112911 U CN206112911 U CN 206112911U
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Abstract
The utility model relates to a supercritical cycle fluidized bed boiler furnace square waveform mid -board. This mid -board includes mid -board water cold wall pipe screen, first part case and next part case, and mid -board water cold wall pipe screen comprises a plurality of individual layer pipes, and a plurality of mid -board water cold wall pipe are shielded into square waveform and are arranged, mid -board water cold wall pipe is connected with the first part case screen upper end, and the lower extreme is connected with first part case, and first part case both sides communicate with the furnace roof water -cooling wall respectively, and first part case and next part case both ends are connected with the both sides brickwork respectively. The utility model discloses can its heating area of greatly increased to reduce the furnace height.
Description
Technical field
This utility model is related to a kind of circulating fluid bed boiler burner hearth middle partition wall structure, and particularly a kind of supercritical is followed
Ring fluid bed boiler furnace square waveform mid-board.
Background technology
Supercritical circulating fluidized bed boiler has had the spy of supercritical steam circulation and circulating fluidized-bed boiler Combustion technology concurrently
Point, is a kind of high-efficiency cleaning coal-fired power generator set, and heatflow characteristics make it more suitable than coal-powder boiler in the stove of CFBB
Close in combination with supercritical steam circulating technology, therefore, CFBB develops into inexorable trend towards supercritical.
As CFBB capacity constantly increases, parameter is improved constantly, and causes burner hearth internal heating surface to be continuously increased,
Furnace height is continuously increased, and to boiler structure arrangement and manufacturing cost problem is brought, therefore, recirculating fluidized bed pot is rationally set
Stove internal heating surface is the problem for having to solve after stove supercritical.
At present Sector of Cfb Boilers is typically all to arrange the method for mid-board heating surface in burner hearth to solve
The certainly stove internal heating surface Layout Problem of large circulating fluidized bed boiler.However, at present existing mid-board design is flat-shaped water
Cold wall tube panel, it can extend to a certain extent stove internal heating surface arrangement, but for especially big extra-high super critical boiler, it is flat-shaped
The mid-board that panelized-tube-wall section is constituted still is limited in the range of to a certain degree for the extension of stove internal heating surface.
Therefore, it is necessary to open one kind can to a greater extent increase stove internal heating surface arrangement, and furnace height can be reduced, be fitted
For the mid-board device of supercritical circulating fluidized bed boiler.
Utility model content
Technical problem to be solved in the utility model is to provide one kind can be increased stove internal heating surface arrangement, reduce burner hearth height
The supercritical circulating fluidized bed boiler hearth square waveform mid-board of degree.
The technical scheme that this utility model solution above-mentioned technical problem is adopted is as follows：
A kind of supercritical circulating fluidized bed boiler hearth square waveform mid-board, including mid-board panelized-tube-wall section, upper collecting chamber
And lower header, mid-board panelized-tube-wall section is made up of some mono-layer tube, and some mid-board panelized-tube-wall sections are arranged into square waveform；
Mid-board panelized-tube-wall section upper end is connected with upper collecting chamber, and lower end is connected with upper collecting chamber, upper collecting chamber both sides respectively with furnace roof water-cooling wall
Connect, and upper collecting chamber and lower header two ends are connected respectively with both sides furnace wall.
This utility model by mid-board panelized-tube-wall section by being set to square waveform such that it is able to greatly increases its heating surface
Product, and reduce furnace height.
Preferably, split burner hearth both sides flue gas, material balance are provided between two neighboring mid-board panelized-tube-wall section leading to
Road.Have an advantage in that, enable to material good mixing in stove, so as to ensure that the equal of material concentration in stove, temperature and heat transfer
Even property.
Preferably, the ratio of mid-board Waterwall Tube Panel Width L and tube panel spacing M is 2/3-1, mid-board panelized-tube-wall section
Amplitude a is 0.5-1 with the ratio of mid-board Waterwall Tube Panel Width L.Have an advantage in that, mid-board panelized-tube-wall section is being increased as far as possible
On the premise of quantity, it is ensured that spacing between tube panel, so that it is guaranteed that the material balance of split burner hearth both sides.
Preferably, mid-board panelized-tube-wall section is made up of membrane wall or light pipe, working medium, membrane type are connected with from bottom to top in pipe
Tube pitch s of wall or light pipe is 1.0-3 with the ratio of pipe outside diameter d.Have an advantage in that, according to mid-board water-cooling wall exchange heat needs, from
And control mid-board water-cooling wall pipe spacing；In addition membrane wall can increase the caloric receptivity of mid-board heating surface, strengthen heat transfer effect
Rate.
Preferably, membrane wall or light tube outer surface are provided with the fin of Longitudinal Extension, and fin height h and tube outer diameter d
Ratio be 0.25-2, the ratio of fin width b and tube outer diameter d is 0.001-0.25.Have an advantage in that, the setting of fin can increase
Plus mid-board heating surface caloric receptivity, strengthen mid-board heating surface heat transfer efficiency, while fin structure can also mitigate solid in stove
Impact and abrasion of the grain to mid-board.
Membrane wall described in the utility model refers to that the furnace wall of boiler is in blocks with pipe and fin welding, with simple, section
The advantages of saving steel.
This utility model compared with the existing technology has advantages below and effect：
1st, square waveform mid-board of the present utility model can greatly increase its heating surface area, it is possible to decrease furnace height.
2nd, this utility model enables to material good mixing in stove, so as to ensure that material concentration in stove, temperature and biography
The uniformity of heat.
3rd, fin type structural pipe wall of the present utility model on tube wall side by welding Longitudinal Extension fin come in increasing
Partition wall heating surface recepts the caloric, and strengthens mid-board heating surface heat transfer efficiency, while fin type structure can also mitigate solid particle in stove
Impact and abrasion to mid-board.
Description of the drawings
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will be to embodiment
Or the accompanying drawing to be used needed for description of the prior art is briefly described, it should be apparent that, drawings in the following description are only
It is some embodiments of the present utility model, for those of ordinary skill in the art, in the premise for not paying creative work
Under, can be with according to these other accompanying drawings of accompanying drawings acquisition.
Fig. 1 is this utility model mid-board panelized-tube-wall section three dimensional structure diagram.
Fig. 2 is upper header structure schematic diagram of the present utility model.
Fig. 3 is lower header structural representation of the present utility model
Fig. 4 is mid-board arrangement form schematic diagram of the present utility model.
Fig. 5 is the arrangement form schematic diagram of traditional mid-board.
Fig. 6 is structural pipe wall schematic diagram of the present utility model.
Label declaration：
1st, mid-board panelized-tube-wall section 2, upper collecting chamber
3rd, lower header 4, light pipe
5th, membrane wall 6, fin
Specific embodiment
This utility model is described in further detail with reference to embodiment, following examples are to this utility model
Explanation and this utility model is not limited to following examples.
As shown in Figures 1 to 3, the present embodiment is made up of mid-board panelized-tube-wall section 1, upper collecting chamber 2 and lower header 3.Mid-board
Panelized-tube-wall section 1 is made up of some mono-layer tube, 1 one-tenth square waveform arrangement of some mid-board panelized-tube-wall sections, mid-board water-cooling wall
The upper end of tube panel 1 is connected with upper collecting chamber 2, and lower end is connected with upper collecting chamber 2.
Side wall is drawn upwards after mid-board bottom comes together in lower header 3 by lower header 3 in split type lower furnace portion
The mono-layer tube some mid-board panelized-tube-wall sections 1 of composition, and come together in upper collecting chamber 2 in upper furnace.The both sides of upper collecting chamber 2 and stove
Top water-cooling wall connection, upper collecting chamber 2 and the two ends of lower header 3 are fastenedly connected with both sides furnace wall.
The quantity of mid-board panelized-tube-wall section 1 is more than a piece of.
1 one-tenth square waveform arrangement of some mid-board panelized-tube-wall sections, and be provided between two neighboring mid-board panelized-tube-wall section 1
Split burner hearth both sides flue gas, material balance passage.
In the present embodiment, the arrangement form of mid-board as illustrated in figures 4-5, between the width L of mid-board panelized-tube-wall section 1 and tube panel
Ratio away from M is 2/3-1, and amplitude a of square waveform mid-board panelized-tube-wall section 1 is 0.5- with the ratio of the width L of mid-board panelized-tube-wall section 1
1。
From fig. 4, it can be seen that compared with the mid-board (as shown in Figure 5) of traditional flat-shaped screen piece arrangement, square waveform mid-board
Structure can greatly increase its heating surface area, it is possible to decrease furnace height.
Mid-board panelized-tube-wall section 1 is made up of the membrane wall 5 with fin 6 or light pipe 4, and in pipe working medium is connected with from bottom to top.
As shown in fig. 6a-6c, tube pitch s of membrane wall 5 or light pipe 4 and the ratio of pipe outside diameter d are 1.0-3, membrane wall 5 or light
The outer surface of pipe 4 is provided with the fin 6 of Longitudinal Extension, and the height h of fin 6 and the ratio of tube outer diameter d are 0.25-2, the width b of fin 6 with
The ratio of tube outer diameter d is 0.001-0.25.The setting of fin 6 can increase mid-board heating surface caloric receptivity, strengthen mid-board and receive
Hot face heat transfer efficiency, while the structure of fin 6 can also mitigate impact and abrasion of the solid particle to mid-board in stove.
Furthermore, it is necessary to explanation, the specific embodiment described in this specification, is named the shape of its parts and components
Title etc. can be with difference.The equivalent or simple change that all constructions according to described in this utility model inventional idea, feature and principle are done,
It is included in the protection domain of this utility model patent.This utility model person of ordinary skill in the field can be to being retouched
The specific embodiment stated is made various modifications or supplements or substituted using similar mode, without departing from this utility model
Structure or surmount scope defined in the claims, protection domain of the present utility model all should be belonged to.
Claims (5)
1. a kind of supercritical circulating fluidized bed boiler hearth square waveform mid-board, is characterized in that：Including mid-board panelized-tube-wall section,
Upper collecting chamber and lower header, described mid-board panelized-tube-wall section is made up of some mono-layer tube, some mid-board panelized-tube-wall sections
Into square waveform arrangement；Mid-board panelized-tube-wall section upper end is connected with upper collecting chamber, and lower end is connected with upper collecting chamber, upper collecting chamber both sides difference
Connect with furnace roof water-cooling wall, and upper collecting chamber and lower header two ends are connected respectively with both sides furnace wall.
2. a kind of supercritical circulating fluidized bed boiler hearth square waveform mid-board according to claim 1, is characterized in that：Phase
Split burner hearth both sides flue gas, material balance passage are provided between adjacent two septum wall panelized-tube-wall sections.
3. a kind of supercritical circulating fluidized bed boiler hearth square waveform mid-board according to claim 1, is characterized in that：In
The ratio of partition wall Waterwall Tube Panel Width L and tube panel spacing M is 2/3-1, and mid-board panelized-tube-wall section amplitude a and mid-board water-cooled
The ratio of wall tube panel width L is 0.5-1.
4. a kind of supercritical circulating fluidized bed boiler hearth square waveform mid-board according to claim 1, is characterized in that：Institute
The mid-board panelized-tube-wall section stated is made up of membrane wall or light pipe, and in pipe working medium is connected with from bottom to top, and membrane wall or light pipe
Tube pitch s is 1.0-3 with the ratio of pipe outside diameter d.
5. a kind of supercritical circulating fluidized bed boiler hearth square waveform mid-board according to claim 4, is characterized in that：Institute
The membrane wall or light tube outer surface stated are provided with the fin of Longitudinal Extension, and fin height h and the ratio of tube outer diameter d are 0.25-2,
Fin width b is 0.001-0.25 with the ratio of tube outer diameter d.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620995755.4U CN206112911U (en) | 2016-08-30 | 2016-08-30 | Supercritical cycle fluidized bed boiler furnace square waveform mid -board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620995755.4U CN206112911U (en) | 2016-08-30 | 2016-08-30 | Supercritical cycle fluidized bed boiler furnace square waveform mid -board |
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| Publication Number | Publication Date |
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| CN206112911U true CN206112911U (en) | 2017-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201620995755.4U Active CN206112911U (en) | 2016-08-30 | 2016-08-30 | Supercritical cycle fluidized bed boiler furnace square waveform mid -board |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106224945A (en) * | 2016-08-30 | 2016-12-14 | 华电电力科学研究院 | Supercritical circulating fluidized bed boiler hearth square waveform mid-board |
| CN112902220A (en) * | 2020-12-22 | 2021-06-04 | 中国天辰工程有限公司 | Y-shaped pipe and water-cooled wall |
-
2016
- 2016-08-30 CN CN201620995755.4U patent/CN206112911U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106224945A (en) * | 2016-08-30 | 2016-12-14 | 华电电力科学研究院 | Supercritical circulating fluidized bed boiler hearth square waveform mid-board |
| CN112902220A (en) * | 2020-12-22 | 2021-06-04 | 中国天辰工程有限公司 | Y-shaped pipe and water-cooled wall |
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