CN202008136U - Circulating fluidized bed boiler - Google Patents
Circulating fluidized bed boiler Download PDFInfo
- Publication number
- CN202008136U CN202008136U CN201120089153XU CN201120089153U CN202008136U CN 202008136 U CN202008136 U CN 202008136U CN 201120089153X U CN201120089153X U CN 201120089153XU CN 201120089153 U CN201120089153 U CN 201120089153U CN 202008136 U CN202008136 U CN 202008136U
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- China
- Prior art keywords
- bed
- hearth
- leg
- legs
- fluidized
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- Expired - Lifetime
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Abstract
A circulating fluidized bed boiler comprises a double-leg hearth with two bottom fluidized air chambers. A fluidized air distribution board is disposed in each fluidized air chamber, separators are disposed on two sides of the double-leg hearth, the top and the bottom of each separator are both communicated with the hearth, and two legs at the bottom of the hearth are communicated with each other through at least one communication pipe. Fluidized bed materials are similar to fluid in property, so that the bed materials in the leg on the higher bed pressure side automatically 'flow' into the left on the lower bed pressure side, the effect is similar to that of a bottom communicating vessel of the fluid, bed material balance of the two legs is achieved, bed pressure difference of the two legs is reduced, situations caused by bed turning are eliminated, and operational accidents and economic loss are avoided. The communication pipe 8 is simple in structure, a bent clearance pipe structure is adopted if an opening on a water cooling wall of the hearth is needed, and affection on the integral design and manufacture of the hearth is low.
Description
Technical field
The utility model relates to a kind of CFBB that prevents tilting table.
Background technology
Being meant from coal exploitation to the overall process of utilizing, clean coal technology is intended to reduce disposal of pollutants and new technologies such as the processing that improves utilization ratio, burning, conversion and pollution control, being one of dominant technology of our times various countries solution environmental problem, also is a key areas of international high-tech competition.The circulating fluidized bed combustion coal boiler is as one of clean coal technology, it is a kind of commercialization technology that has dropped into generating operation, comparative maturity, since have coal adapt to wide, efficiency of combustion is high and characteristics such as in-furnace desulfurization, denitration, make jumbo in recent years circulating fluidized bed combustion coal boiler make and application technology aspect obtaining than quantum jump and progress.
CFBB adopts fluidised combustion system, is a kind of combustion system between coal-powder boiler suspension combustion and chain furnace fixed combustion.So-called fluidization is meant that solid particle is in flow regime under the effect of fluidized wind 5 air, thereby has the state of many fluid properties.Exist a large amount of bed material (material) in circulating fluid bed boiler, these material are in fluidized state under wind of boiler, secondary wind action, can realize the interior circulation in the burner hearth; Compare with other boilers in addition, CFBB has increased high-temperature material closed circuit part, and promptly separator 3; Its role is to realize that gas-solid two is separated, most solid particles of carrying secretly in the flue gas are separated, realized the outer circulation of bed material outside burner hearth, thereby make boiler reciprocation cycle burning constantly by returning charge leg 4; Therefore, CFBB has very high efficiency of combustion, and is also better to the adaptability of fuel.
In the process of large scale development, produced the CFBB of two supporting legs (being commonly called as " pants leg ") type chamber structure, as shown in Figure 1 at the CFBB capacity.Because this type of furnace makes it to become the main selection scheme that CFBB develops to big capacity, high parameter direction in the advantage of amplifying design aspect.
But two supporting leg type structure burner hearths 1 are because the bottom bifurcated causes so-called bed material " tilting table " phenomenon easily.This is because when boiler operatiopn, the bed material on the two supporting leg fluidisation air distribution plates 7 can not reach absolute equilibrium, certainly exists certain bed pressure reduction.If occur bigger bed pressure reduction between two supporting legs, supporting leg one side that the bed material is forced down from bed, be blown to bed and press high supporting leg one side, make the continuous increasing of this side bed pressure holding, air quantity reduces gradually, and opposite side is then just opposite, unbalanced state will further aggravate, can cause the interior most of bed material of stove to gather in the side leg at short notice, and the opposite side supporting leg almost there is not bed to expect, as " turning over " past.
The tilting table phenomenon can make a side leg bed material too much, bed is pressed too high, even thoroughly destroy fluidization, the bed material is killed on fluidisation air distribution plate 7 (be commonly called as " bed collapses "), bring very big harm for the operation of CFBB, control the bad load that will cause and reduce even the blowing out accident, cause interruption of service and economic loss.
Present generation for fear of the tilting table phenomenon, adopt mostly fluidized wind 5 air quantity are distributed the reinforcement adjusting or increase barrier structure etc. between burner hearth two supporting legs, but it is limited to regulate limit, the complex structure degree increases more, nor can eliminate the bed pressure reduction of both sides fully, still have certain tilting table risk.
The utility model content
The purpose of this utility model provides a kind of CFBB that can prevent effectively that the tilting table phenomenon from occurring.
For achieving the above object, the utility model is by the following technical solutions:
The utility model comprises that the bottom is provided with two supporting leg type burner hearths of two fluidisation air compartments, all is provided with the fluidisation air distribution plate in each fluidisation air compartment; The both sides of described pair of supporting leg type burner hearth are provided with separator, and the separator upper and lower all communicates with burner hearth, between two supporting legs of described burner hearth bottom by communicating at least one communicating pipe.
Described communicating pipe is at least two siphunculus that intersection communicates.
Described communicating pipe is at least two staggered siphunculus that are obliquely installed.
At least one fluidized wind nozzle was set below described communicating pipe.
Adopt the utility model of technique scheme, be similar to the character of fluid after the utilization bed materials flowization, make bed press the bed of a higher side leg to expect that " stream " presses low side leg to bed automatically, its effect is similar to the bottom linker that liquid is housed, thereby reach the balance of bed material between two supporting legs, reduce bed pressure reduction between two supporting legs, thereby eliminate the condition that the tilting table phenomenon produces, avoid interruption of service and economic loss.Structure is very simple communicating pipes 8 in the utility model, and the perforate on furnace wall cooling is if desired then adopted to bend to allow tubular construction, to the global design of burner hearth with to make influence little.
Description of drawings
Fig. 1 is the structure chart of two supporting leg type CFBBs in the prior art.
Fig. 2 is a structure chart of the present utility model.
The specific embodiment
As shown in Figure 2, CFBB comprises that the bottom is provided with two supporting leg type burner hearths 1 of two fluidisation air compartments 6, all is provided with fluidisation air distribution plate 7 in each fluidisation air compartment 6; Both sides at two supporting leg type burner hearths 1 are provided with separator 3, and separator 3 tops communicate with burner hearth, and its underpart communicates with burner hearth by returning charge leg 4, and connect flue 2 at the top of separator 3.
The utility model is in order to stop the generation of tilting table phenomenon, between two supporting legs of burner hearth 1 bottom by communicating communicating pipe 8.When fluidisation air distribution plate 7 was set in the supporting leg, communicating pipe 8 was positioned at the top of fluidisation air distribution plate 7.Above-mentioned communicating pipe 8 is meant inclination between adjacent communicating pipe but does not communicate at least two staggered siphunculus that are obliquely installed, above-mentioned staggered inclination.In addition, communicating pipe 8 is at least two siphunculus that intersection communicates, and this technical scheme is meant and communicates two adjacent communicating pipe, can be " ten " font of tiltedly putting.Need to prove that the quantity of communicating pipe 8 is decided according to the burner hearth concrete condition, they are distributed as a row, can be two, three, four or more.Communicating pipes 8, structure was very simple, and perforate on furnace wall cooling is if desired then adopted to bend to allow tubular construction, to the global design of burner hearth with to make influence little.
Communicating pipe between the set supporting leg of the utility model, adopt adiabatic or air-cooled pattern, set up fluidized wind 5 nozzles of some in case of necessity in its underpart, to guarantee the fluidized state of bed material, avoid the bed material to stagnate or be blocked in communicating pipe.
Claims (4)
1. CFBB, it comprises that the bottom is provided with two supporting leg type burner hearths (1) of two fluidisation air compartments (6), all is provided with fluidisation air distribution plate (7) in each fluidisation air compartment (6); The both sides of described pair of supporting leg type burner hearth (1) are provided with separator (3), and separator (3) upper and lower all communicates with burner hearth, it is characterized in that: between two supporting legs of described burner hearth (1) bottom by communicating at least one communicating pipe (8).
2. CFBB according to claim 1 is characterized in that: described communicating pipe (8) is at least two siphunculus that intersection communicates.
3. CFBB according to claim 1 is characterized in that: described communicating pipe (8) is at least two staggered siphunculus that are obliquely installed.
4. according to claim 2 or 3 described CFBBs, it is characterized in that: at least one fluidized wind nozzle is set in the below of described communicating pipe (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120089153XU CN202008136U (en) | 2011-03-30 | 2011-03-30 | Circulating fluidized bed boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120089153XU CN202008136U (en) | 2011-03-30 | 2011-03-30 | Circulating fluidized bed boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202008136U true CN202008136U (en) | 2011-10-12 |
Family
ID=44749793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120089153XU Expired - Lifetime CN202008136U (en) | 2011-03-30 | 2011-03-30 | Circulating fluidized bed boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202008136U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102635854A (en) * | 2012-04-24 | 2012-08-15 | 清华大学 | Large-scale circulating fluid bed boiler with buffering bed |
| CN102721045A (en) * | 2011-03-30 | 2012-10-10 | 河南省电力勘测设计院 | Circulating fluidized bed boiler |
| CN114811576A (en) * | 2022-05-03 | 2022-07-29 | 浙江大学 | Large-scale CFB double-hearth boiler communication equipment |
-
2011
- 2011-03-30 CN CN201120089153XU patent/CN202008136U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102721045A (en) * | 2011-03-30 | 2012-10-10 | 河南省电力勘测设计院 | Circulating fluidized bed boiler |
| CN102721045B (en) * | 2011-03-30 | 2016-04-06 | 河南省电力勘测设计院 | A kind of CFBB |
| CN102635854A (en) * | 2012-04-24 | 2012-08-15 | 清华大学 | Large-scale circulating fluid bed boiler with buffering bed |
| CN102635854B (en) * | 2012-04-24 | 2014-11-26 | 清华大学 | Large-scale circulating fluid bed boiler with buffering bed |
| CN114811576A (en) * | 2022-05-03 | 2022-07-29 | 浙江大学 | Large-scale CFB double-hearth boiler communication equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20111012 Effective date of abandoning: 20160406 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |