CN207815303U - CFB Slag cooling structure - Google Patents
CFB Slag cooling structure Download PDFInfo
- Publication number
- CN207815303U CN207815303U CN201721480858.8U CN201721480858U CN207815303U CN 207815303 U CN207815303 U CN 207815303U CN 201721480858 U CN201721480858 U CN 201721480858U CN 207815303 U CN207815303 U CN 207815303U
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- China
- Prior art keywords
- water
- cooling
- chamber
- cooling wall
- dreg
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 173
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 78
- 239000002893 slag Substances 0.000 claims abstract description 22
- 239000000203 mixture Substances 0.000 claims description 5
- 239000010882 bottom ash Substances 0.000 abstract description 15
- 239000012530 fluid Substances 0.000 abstract description 6
- 239000002826 coolant Substances 0.000 abstract description 5
- 238000000034 method Methods 0.000 abstract description 4
- 230000003134 recirculating effect Effects 0.000 abstract description 4
- 239000002245 particle Substances 0.000 abstract description 3
- 238000009825 accumulation Methods 0.000 abstract description 2
- 239000003570 air Substances 0.000 description 12
- 238000002485 combustion reaction Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 239000000446 fuel Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 241000270295 Serpentes Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010884 boiler slag Substances 0.000 description 1
- 210000000038 chest Anatomy 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Landscapes
- Gasification And Melting Of Waste (AREA)
Abstract
The utility model discloses a kind of CFB Slag cooling structure and methods.The cooling structure includes the water cooled wind chamber set on burner hearth bottom, and the outside of burner hearth is equipped with dreg cooling chamber's water-cooling wall, and dreg cooling chamber's water-cooling wall extends downwardly outside to the bottom of water cooled wind chamber along water cooled wind chamber, and dreg cooling chamber is constituted with water cooled wind chamber water-cooling wall.The high temperature bottom slag that the bottom ash particle that recirculating fluidized bed is formed is discharged from the slag inlet of burner hearth bottom slowly flows across, and contacts and exchanges heat with dreg cooling chamber's water-cooling wall and water cooled wind chamber water-cooling wall, fluid bed high temperature bottom slag is made to be cooled down；After cooling medium in dreg cooling chamber's water-cooling wall is heated, water cooled air compartment lower header enters water cooled wind chamber water-cooling wall, and the bottom ash heat that dreg cooling chamber absorbs enters boiler steam-water circulation system immediately.The utility model makes bottom ash accumulation of heat that can directly be recycled by boiler, improves boiler thermal efficiency；Dreg cooling chamber is directly cooled down with boiler water, is reduced or is not had to other water sources, save power plant water.
Description
Technical field
The utility model is related to a kind of CFB Slag cooling structures, and in particular to a kind of to use furnace wall cooling
The structure and method of cooling bed boiler high temperature bottom ash are used for cooling cycle bottom dregs at fluid bed boiler, belong to recirculating fluidized bed
Boiler technology field.
Background technology
The bottom ash of circulating fluidized bed boiler discharge is a kind of wide-size distribution（0~30mm）, high-temperature（~900 DEG C）Solid
Grain belongs to the material of more difficult operation and control, especially large capacity（Or the big quantity of slag）CFB boiler, both at home and abroad all without good
Solution.Therefore, dreg cooling chamber belongs to one of technological difficulties the most intractable in fluidized-bed combustion boiler auxiliary system.It introduces the country
Fluidized bed type dreg cooling chamber due to cooling down the factors such as heating surface wear there are slagging, boiler slag removal control failure and dreg cooling chamber and cause
The problems such as expected cooling effect is not achieved in the dreg cooling chamber causes prodigious economic loss to power plant.And some mechanical cold slags
Room, such as water cooling auger, water cold drum, since there is poorly sealed, cooling capacity is poor, repair and maintenance heavy workload etc. is asked
Topic, application prospect is not very optimistic at home.
Method and apparatus currently on the market about recirculating fluidized bed bottom slag cooling is more, the cooling original of cylinder type cold grit chamber
Reason is that CFB bottom ash is introduced by pipeline in the roller of rotation, and arrangement heating surface has medium in the interlayer or cylinder of roller
Water cools down, since there are mechanical rotations for the device so that the pressure of water cooling medium cannot be excessively high, general to require to be less than
4.0MPa, additionally, due to there are the sealings of rotatable parts, slag inlet to be also very difficult to handle, comercial operation shows that the equipment is frequent
There is leak, leakage slag, bottom ash heat can not be recycled effectively.
The dreg cooling chamber of wind and water combined circulating fluid bed type, design principle are that a class is added outside circulating fluidized bed boiler
It is similar to be bubbled the dreg cooling chamber of bed type, be usually made of several rooms separated by weir wall, the bottom ash of fluidized-bed combustion boiler is drawn by pipeline
To the empty room part of the device, bottom is fluidized by being passed through air dielectric in dreg cooling chamber's bottom air distribution plate of circulating fluid bed type
Slag realizes flowing and conveying of the bottom ash between each room, and according to cooling required, snake heating surface of tubes is arranged in dreg cooling chamber.This
The dreg cooling chamber of kind form shows the unsmooth flowing between each room of bottom ash and leads in operation, will often find that stifled slag etc. is asked
Topic.
Invention content
Problem to be solved in the utility model is：Existing wind and water combined circulating fluid bed type dreg cooling chamber block up slag, abrasion,
Heating surface is not easy the problems such as replacing, and provides a kind of bottom ash being suitable for the fuel such as the high ash content of circulating fluidized bed combustion, low heat value
Cooling means and the device and corresponding system for realizing this method, and how to utilize the cold slag of furnace wall cooling surface pipe composition
The cavity of room cools down bottom ash using the cavity as heating surface using the stove water of boiler, realizes the heat recovery of bottom ash, reduces cold
The usage quantity and floor space of grit chamber.
In order to solve the above-mentioned technical problem, the utility model provides a kind of CFB Slag cooling structure,
Include the water cooled wind chamber set on burner hearth bottom, the side of water cooled wind chamber is equipped with air inlet, and the water-cooling wall one of lower furnace portion is equipped with
Slag inlet, which is characterized in that the outside of the burner hearth is equipped with dreg cooling chamber's water-cooling wall, and dreg cooling chamber's water-cooling wall is extended downwardly along water cooling
The outside of air compartment to the bottom of water cooled wind chamber constitutes dreg cooling chamber with water cooled wind chamber water-cooling wall, and slag inlet is located in dreg cooling chamber, cold
The bottom of grit chamber is equipped with slag-drip opening, and slag-drip opening is made of water-cooling wall six.
Preferably, the junction of the water cooled wind chamber and dreg cooling chamber be equipped with water cooled wind chamber lower header, water cooled wind chamber water-cooling wall,
Dreg cooling chamber's water-cooling wall is connected to water cooled wind chamber lower header；Burner hearth, water cooled wind chamber, dreg cooling chamber three junction be equipped with water cooled wind chamber
Upper collecting chamber, water-cooling wall one, water cooled wind chamber water-cooling wall are connected to water cooled wind chamber upper collecting chamber.
Preferably, dreg cooling chamber's water-cooling wall is by sequentially connected oblique outer downward water-cooling wall two, water straight down
Cold wall three, in the diagonal downward water-cooling wall four, horizontal direction water-cooling wall five and extend to the water cooling of water cooled wind chamber straight up
Wall seven forms, and slag-drip opening is set to five downside of water-cooling wall；Water cooled wind chamber water-cooling wall by sequentially connected water-cooling wall eight straight down,
In the diagonal downward water-cooling wall nine, horizontal direction water-cooling wall ten and extend to the water-cooling wall ten of two bottom of water-cooling wall straight up
One composition.
It is highly preferred that the water-cooling wall four and the angle of water-cooling wall five are 135 ° ~ 180 °.
Preferably, dreg cooling chamber's water-cooling wall uses fin panel casing.
Preferably, the burner hearth bottom is located at the lower section of slag-drip opening equipped with burner hearth air distribution plate.
Preferably, the cooling medium of all water-cooling walls is stove water.
Compared with prior art, the beneficial effects of the utility model are：
1. bottom ash accumulation of heat can be recycled directly by boiler, boiler thermal efficiency is improved；
2. dreg cooling chamber's surrounding is directly formed using water wall surface, keep dreg cooling chamber safe and reliable, is convenient for INSULATION DESIGN；
3. dreg cooling chamber is arranged in the lower part of water-cooling wall cone section, arrangement is convenient, saves space；
4. dreg cooling chamber is directly cooled down with boiler water, other water sources are reduced or do not had to, power plant water is saved.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of CFB Slag cooling structure provided by the utility model.
Specific implementation mode
To make the utility model be clearer and more comprehensible, hereby with preferred embodiment, and attached drawing is coordinated to be described in detail below.
Embodiment
As shown in Figure 1, being a kind of CFB Slag cooling structure provided by the utility model, including it is set to stove
The side of the water cooled wind chamber 2 of 1 bottom of thorax, water cooled wind chamber 2 is equipped with air inlet B, and the water-cooling wall 1 of 1 lower part of burner hearth is equipped with slag input
The outside of mouth A, the burner hearth 1 are equipped with dreg cooling chamber's water-cooling wall 7, and dreg cooling chamber's water-cooling wall 7 uses fin panel casing.Dreg cooling chamber's water-cooling wall
7 extend downwardly outside to the bottom of water cooled wind chamber 2 along water cooled wind chamber, and dreg cooling chamber 4 is constituted with water cooled wind chamber water-cooling wall, into
Cinder notch A is located in dreg cooling chamber 4, and the bottom of dreg cooling chamber 4 is equipped with slag-drip opening 5, and slag-drip opening 5 is made of water-cooling wall 6 26.1 bottom of burner hearth
It is equipped with burner hearth air distribution plate 9 positioned at the lower section of slag inlet A.Water cooled wind chamber 2 and the junction of dreg cooling chamber 4 are equipped with water cooled wind chamber lower header
3, water cooled wind chamber water-cooling wall, dreg cooling chamber's water-cooling wall 7 are connected to water cooled wind chamber lower header 3；Burner hearth 1, water cooled wind chamber 2, dreg cooling chamber 4 three
The junction of person is equipped with water cooled wind chamber upper collecting chamber 6, and water-cooling wall 1, water cooled wind chamber water-cooling wall are connected to water cooled wind chamber upper collecting chamber 6.
Dreg cooling chamber's water-cooling wall 7 is by sequentially connected oblique outer downward water-cooling wall 2 22, water-cooling wall 3 23 straight down, oblique introversion
Under water-cooling wall 4 24, horizontal direction water-cooling wall 5 25 and extend to straight up water cooled wind chamber 2 water-cooling wall 7 27 form,
Slag-drip opening 5 is set to 5 25 downside of water-cooling wall；Water cooled wind chamber water-cooling wall is by sequentially connected water-cooling wall 8 28 straight down, oblique
Interior downward water-cooling wall 9 29, horizontal direction water-cooling wall 10 and extend to the water-cooling wall of 2 22 bottom of water-cooling wall straight up
11 compositions.Water-cooling wall 4 24 and the angle of water-cooling wall 5 25 are 135 ° ~ 180 °.The cooling medium of all water-cooling walls is stove
Water.
A kind of CFB Slag cooling means：
The bed material of fuel and composition recirculating fluidized bed completes burning in the burner hearth 1, required portion of air by into
Air port B enters water cooled wind chamber 2, then big by the flue gas entrainment that air distribution plate fluidized bed material and fuel, air and fuel combustion generate
The particle of amount enters cyclone separator, and coarse granule carries out circulating combustion back to burner hearth 1 by material returning device by cyclonic separation, do not have
The fine grained detached then forms flying dust and is discharged into tail portion convection pass by the top of cyclone separator with flue gas, ciculation fluidized
The high temperature bottom slag that the bottom ash particle that bed is formed is discharged from the slag inlet A of 1 bottom of burner hearth slowly flows across, with dreg cooling chamber water-cooling wall 7 and
The contact of water cooled wind chamber water-cooling wall exchanges heat, and fluid bed high temperature bottom slag is made to be cooled down, and is then discharged from slag-drip opening 5；Dreg cooling chamber
After cooling medium in water-cooling wall 7 is heated, water cooled air compartment lower header 3 enters water cooled wind chamber water-cooling wall, the bottom that dreg cooling chamber 4 absorbs
Slag heat enters boiler steam-water circulation system immediately.
Claims (7)
1. a kind of CFB Slag cooling structure, including it is set to burner hearth（1）The water cooled wind chamber of bottom（2）, water cooling wind
Room（2）Side be equipped with air inlet（B）, burner hearth（1）The water-cooling wall one of lower part（21）It is equipped with slag inlet（A）, which is characterized in that
The burner hearth（1）Outside be equipped with dreg cooling chamber's water-cooling wall（7）, dreg cooling chamber's water-cooling wall（7）It extends downwardly along the outer of water cooled wind chamber
Side is to water cooled wind chamber（2）Bottom, with water cooled wind chamber water-cooling wall constitute dreg cooling chamber（4）, slag inlet（A）Positioned at dreg cooling chamber（4）
It is interior, dreg cooling chamber（4）Bottom be equipped with slag-drip opening（5）, slag-drip opening（5）By water-cooling wall six（26）It constitutes.
2. CFB Slag cooling structure as described in claim 1, which is characterized in that the water cooled wind chamber（2）
With dreg cooling chamber（4）Junction be equipped with water cooled wind chamber lower header（3）, water cooled wind chamber water-cooling wall, dreg cooling chamber's water-cooling wall（7）With water cooling
Air compartment lower header（3）Connection；Burner hearth（1）, water cooled wind chamber（2）, dreg cooling chamber（4）The junction of three is equipped with water cooled wind chamber upper collecting chamber
（6）, water-cooling wall one（21）, water cooled wind chamber water-cooling wall and water cooled wind chamber upper collecting chamber（6）Connection.
3. CFB Slag cooling structure as described in claim 1, which is characterized in that dreg cooling chamber's water-cooling wall
（7）By sequentially connected oblique outer downward water-cooling wall two（22）, water-cooling wall three straight down（23）, downward water in the diagonal
Cold wall four（24）, horizontal direction water-cooling wall five（25）And water cooled wind chamber is extended to straight up（2）Water-cooling wall seven（27）Group
At slag-drip opening（5）Set on water-cooling wall five（25）Downside；Water cooled wind chamber water-cooling wall is by sequentially connected water-cooling wall eight straight down
（28）, downward water-cooling wall nine in the diagonal（29）, horizontal direction water-cooling wall ten（30）And water-cooling wall two is extended to straight up
（22）The water-cooling wall 11 of bottom（31）Composition.
4. CFB Slag cooling structure as claimed in claim 3, which is characterized in that the water-cooling wall four（24）
With water-cooling wall five（25）Angle be 135 ° ~ 180 °.
5. CFB Slag cooling structure as described in claim 1, which is characterized in that dreg cooling chamber's water-cooling wall
（7）Using fin panel casing.
6. CFB Slag cooling structure as described in claim 1, which is characterized in that the burner hearth（1）Bottom
Positioned at slag-drip opening（5）Lower section be equipped with burner hearth air distribution plate（9）.
7. CFB Slag cooling structure as described in claim 1, which is characterized in that the cooling of all water-cooling walls
Medium is stove water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721480858.8U CN207815303U (en) | 2017-11-08 | 2017-11-08 | CFB Slag cooling structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721480858.8U CN207815303U (en) | 2017-11-08 | 2017-11-08 | CFB Slag cooling structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207815303U true CN207815303U (en) | 2018-09-04 |
Family
ID=63334477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721480858.8U Withdrawn - After Issue CN207815303U (en) | 2017-11-08 | 2017-11-08 | CFB Slag cooling structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207815303U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107859993A (en) * | 2017-11-08 | 2018-03-30 | 上海锅炉厂有限公司 | A kind of CFB Slag cooling structure and method |
-
2017
- 2017-11-08 CN CN201721480858.8U patent/CN207815303U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107859993A (en) * | 2017-11-08 | 2018-03-30 | 上海锅炉厂有限公司 | A kind of CFB Slag cooling structure and method |
| CN107859993B (en) * | 2017-11-08 | 2023-12-01 | 上海锅炉厂有限公司 | Bottom slag cooling structure and method for circulating fluidized bed boiler |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20180904 Effective date of abandoning: 20231201 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20180904 Effective date of abandoning: 20231201 |