CN106224945A - Supercritical circulating fluidized bed boiler hearth square waveform mid-board - Google Patents
Supercritical circulating fluidized bed boiler hearth square waveform mid-board Download PDFInfo
- Publication number
- CN106224945A CN106224945A CN201610770006.6A CN201610770006A CN106224945A CN 106224945 A CN106224945 A CN 106224945A CN 201610770006 A CN201610770006 A CN 201610770006A CN 106224945 A CN106224945 A CN 106224945A
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- Prior art keywords
- board
- mid
- tube
- panelized
- wall
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/18—Details; Accessories
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
- F23M5/00—Casings; Linings; Walls
- F23M5/08—Cooling thereof; Tube walls
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The present invention relates to a kind of supercritical circulating fluidized bed boiler hearth square waveform mid-board.This mid-board includes mid-board panelized-tube-wall section, upper collecting chamber and lower header, and mid-board panelized-tube-wall section is made up of some mono-layer tube, and some mid-board panelized-tube-wall sections become square waveform to arrange；Mid-board panelized-tube-wall section upper end is connected with upper collecting chamber, and lower end is connected with upper collecting chamber, and upper collecting chamber both sides connect with furnace roof water-cooling wall respectively, and upper collecting chamber and lower header two ends are connected with both sides furnace wall respectively.The present invention can be greatly increased its heating surface area, and reduces furnace height.
Description
Technical field
The present invention relates to a kind of circulating fluid bed boiler burner hearth middle partition wall structure, particularly a kind of supercritical steam cycle stream
Fluidized bed boiler burner hearth square waveform mid-board.
Background technology
Supercritical circulating fluidized bed boiler has had supercritical steam circulation and the spy of circulating fluidized-bed boiler Combustion technology concurrently
Point, is a kind of high-efficiency cleaning coal-fired power generator set, and in the stove of CFBB, heatflow characteristics makes it suitableeer than coal-powder boiler
Closing and combine with supercritical steam circulating technology, therefore, CFBB develops into inexorable trend towards supercritical.
Along with CFBB capacity constantly increases, parameter improves constantly, and causes burner hearth internal heating surface to be continuously increased,
Furnace height is continuously increased, and arranges boiler structure and manufacturing cost all brings problem, therefore, rationally arrange recirculating fluidized bed pot
After stove supercritical, stove internal heating surface is the problem that have to solve.
Current Sector of Cfb Boilers typically all arranges the method for mid-board heating surface in burner hearth and solves
The certainly stove internal heating surface Layout Problem of large circulating fluidized bed boiler.But, the design of current existing mid-board is flat-shaped water
Cold wall tube panel, it can extend stove internal heating surface to a certain extent and arrange, but for especially big extra-high super critical boiler, flat-shaped
In the range of the mid-board that panelized-tube-wall section is constituted still is limited in a certain degree for the extension of stove internal heating surface.
Arrange therefore, it is necessary to open one can increase stove internal heating surface to a greater extent, and furnace height can be reduced, suitable
Mid-board device for supercritical circulating fluidized bed boiler.
Summary of the invention
The technical problem to be solved is to provide a kind of stove internal heating surface that can increase and arranges, reduces furnace height
Supercritical circulating fluidized bed boiler hearth square waveform mid-board.
It is as follows that the present invention solves the technical scheme that above-mentioned technical problem used:
Supercritical circulating fluidized bed boiler hearth square waveform mid-board, including mid-board panelized-tube-wall section, upper collecting chamber and under
Header, mid-board panelized-tube-wall section is made up of some mono-layer tube, and some mid-board panelized-tube-wall sections become square waveform to arrange；In every
Wall panelized-tube-wall section upper end is connected with upper collecting chamber, and lower end is connected with upper collecting chamber, and upper collecting chamber both sides connect with furnace roof water-cooling wall respectively,
And upper collecting chamber and lower header two ends are connected with both sides furnace wall respectively.
The present invention is by being set to square waveform by mid-board panelized-tube-wall section such that it is able to be greatly increased its heating surface area,
And reduce furnace height.
As preferably, it is provided with split burner hearth both sides flue gas between adjacent two mid-board panelized-tube-wall sections, material balance is led to
Road.Have an advantage in that, it is possible to make material good mixing in stove, thus material concentration, temperature and heat transfer equal in ensure that stove
Even property.
As preferably, mid-board Waterwall Tube Panel Width L is 2/3-1 with the ratio of tube panel spacing M, 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, increasing mid-board panelized-tube-wall section 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.
As preferably, mid-board panelized-tube-wall section is made up of membrane wall or light pipe, is connected with working medium, membrane type in pipe from bottom to top
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 heat exchange needs, from
And control mid-board water-cooling wall pipe spacing；Additionally membrane wall can increase the caloric receptivity of mid-board heating surface, strengthens heat transfer effect
Rate.
As 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, fin width b is 0.001-0.25 with the ratio of tube outer diameter d.Having an advantage in that, the setting of fin can increase
Add mid-board heating surface caloric receptivity, strengthen mid-board heating surface heat transfer efficiency, solid in fin structure can also alleviate stove simultaneously
Grain is to the impact of mid-board and abrasion.
Membrane wall of the present invention refers to that the furnace wall of boiler is in blocks with pipe and fin welding, has simple, saving steel
The advantages such as material.
The present invention compared with the existing technology has the following advantages and effect:
1, the square waveform mid-board of the present invention can be greatly increased its heating surface area, it is possible to decrease furnace height.
2, material good mixing in the present invention enables to stove, thus material concentration, temperature and heat transfer in ensure that stove
Uniformity.
3, the fin type structural pipe wall of the present invention increases mid-board by welding Longitudinal Extension fin on tube wall side
Heating surface recepts the caloric, and strengthens mid-board heating surface heat transfer efficiency, solid particle centering in fin type structure can also alleviate stove simultaneously
The impact of partition wall and abrasion.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
In having technology to describe, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to
Other accompanying drawing is obtained according to these accompanying drawings.
Fig. 1 is mid-board panelized-tube-wall section three dimensional structure schematic diagram of the present invention.
Fig. 2 is the upper header structure schematic diagram of the present invention.
Fig. 3 is the lower header structural representation of the present invention
Fig. 4 is the mid-board arrangement form schematic diagram of the present invention.
Fig. 5 is the arrangement form schematic diagram of tradition mid-board.
Fig. 6 is the structural pipe wall schematic diagram of the present invention.
Label declaration:
1, mid-board panelized-tube-wall section 2, upper collecting chamber
3, lower header 4, light pipe
5, membrane wall 6, fin
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail, following example be explanation of the invention and
The invention is not limited in following example.
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, and some mid-board panelized-tube-wall sections 1 become square waveform to arrange, mid-board water-cooling wall
Tube panel 1 upper end is connected with upper collecting chamber 2, and lower end is connected with upper collecting chamber 2.
In split type lower furnace portion, side wall is after mid-board bottom comes together in lower header 3, lower header 3 draw upwards
Mono-layer tube form some mid-board panelized-tube-wall sections 1, and come together in upper collecting chamber 2 in upper furnace.Upper collecting chamber 2 both sides and stove
Top water-cooling wall connection, upper collecting chamber 2 and lower header 3 two ends are all fastenedly connected with both sides furnace wall.
Mid-board panelized-tube-wall section 1 quantity is more than a piece of.
Some mid-board panelized-tube-wall sections 1 become square waveform to arrange, and are provided with between adjacent two mid-board panelized-tube-wall sections 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 mid-board panelized-tube-wall section 1 width L and tube panel
Ratio away from M is 2/3-1, and square waveform mid-board panelized-tube-wall section 1 amplitude a is 0.5-with the ratio of mid-board panelized-tube-wall section 1 width L
1。
From fig. 4, it can be seen that compared with the mid-board (as shown in Figure 5) of screen sheet flat-shaped with tradition layout, square waveform mid-board
Structure can be greatly increased its heating surface area, it is possible to decrease furnace height.
Mid-board panelized-tube-wall section 1 is made up of membrane wall 5 or the light pipe 4 of band fin 6, is connected with working medium in pipe from bottom to top.
As shown in fig. 6a-6c, tube pitch s of membrane wall 5 or light pipe 4 is 1.0-3 with the ratio of pipe outside diameter d, membrane wall 5 or light
Pipe 4 outer surface is provided with the fin 6 of Longitudinal Extension, and the ratio of fin 6 height h and tube outer diameter d is 0.25-2, fin 6 width b 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, strengthens mid-board and is subject to
Hot side heat transfer efficiency, in fin 6 structure can also alleviate stove simultaneously, solid particle is to the impact of mid-board and abrasion.
Furthermore, it is necessary to explanation, the specific embodiment described in this specification, the shape of its parts and components, it is named
Titles etc. can be different.All equivalences done according to structure, feature and the principle described in inventional idea of the present invention or simple change, all wrap
Include in the protection domain of patent of the present invention.Described can be embodied as by those skilled in the art
Example is made various amendment or supplements or use similar mode to substitute, without departing from the structure of the present invention or surmount this
Scope as defined in the claims, all should belong to protection scope of the present invention.
Claims (5)
1. a supercritical circulating fluidized bed boiler hearth square waveform mid-board, is characterized in that: include 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
Square waveform is become to arrange；Mid-board panelized-tube-wall section upper end is connected with upper collecting chamber, and lower end is connected with upper collecting chamber, and upper collecting chamber both sides are respectively
Connect with furnace roof water-cooling wall, and upper collecting chamber and lower header two ends are connected with both sides furnace wall respectively.
Supercritical circulating fluidized bed boiler hearth square waveform mid-board the most according to claim 1, is characterized in that: adjacent two
Split burner hearth both sides flue gas, material balance passage it is provided with between individual septum wall panelized-tube-wall section.
Supercritical circulating fluidized bed boiler hearth square waveform mid-board the most according to claim 1, is characterized in that: mid-board
Waterwall Tube Panel Width L is 2/3-1 with the ratio of tube panel spacing M, and mid-board panelized-tube-wall section amplitude a and mid-board water screen tube
The ratio of screen width L is 0.5-1.
Supercritical circulating fluidized bed boiler hearth square waveform mid-board the most according to claim 1, is characterized in that: described
Mid-board panelized-tube-wall section is made up of membrane wall or light pipe, is connected with from bottom to top between working medium, and the pipe of membrane wall or light pipe in pipe
Ratio away from s with pipe outside diameter d is 1.0-3.
Supercritical circulating fluidized bed boiler hearth square waveform mid-board the most according to claim 4, is characterized in that: described
Membrane wall or light tube outer surface are provided with the fin of Longitudinal Extension, and the ratio of fin height h and tube outer diameter d is 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 |
|---|---|---|---|
| CN201610770006.6A CN106224945A (en) | 2016-08-30 | 2016-08-30 | Supercritical circulating fluidized bed boiler hearth square waveform mid-board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610770006.6A CN106224945A (en) | 2016-08-30 | 2016-08-30 | Supercritical circulating fluidized bed boiler hearth square waveform mid-board |
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| CN106224945A true CN106224945A (en) | 2016-12-14 |
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| CN201610770006.6A Pending CN106224945A (en) | 2016-08-30 | 2016-08-30 | Supercritical circulating fluidized bed boiler hearth square waveform mid-board |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107883368A (en) * | 2017-10-11 | 2018-04-06 | 华中科技大学 | A kind of more tangential boiler systems of supercritical carbon dioxide reheating coal fired power generation |
| CN107883365A (en) * | 2017-10-11 | 2018-04-06 | 华中科技大学 | A kind of supercritical carbon dioxide reheating coal fired power generation face-fired boiler system |
| CN114939384A (en) * | 2022-04-13 | 2022-08-26 | 东方电气集团东方锅炉股份有限公司 | Fluidized bed with cooling type partition wall |
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| AU2007253231B2 (en) * | 2006-05-18 | 2010-08-19 | Foster Wheeler Energia Oy | Evaporator surface structure of a circulating fluidized bed boiler and a circulating fluidized bed boiler with such an evaporator surface structure |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107883368A (en) * | 2017-10-11 | 2018-04-06 | 华中科技大学 | A kind of more tangential boiler systems of supercritical carbon dioxide reheating coal fired power generation |
| CN107883365A (en) * | 2017-10-11 | 2018-04-06 | 华中科技大学 | A kind of supercritical carbon dioxide reheating coal fired power generation face-fired boiler system |
| CN114939384A (en) * | 2022-04-13 | 2022-08-26 | 东方电气集团东方锅炉股份有限公司 | Fluidized bed with cooling type partition wall |
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Application publication date: 20161214 |