CN108443896A - One kind being suitable for using the anti-slag structure of modification method of accurate eastern coal burning boiler dry bottom hopper - Google Patents
One kind being suitable for using the anti-slag structure of modification method of accurate eastern coal burning boiler dry bottom hopper Download PDFInfo
- Publication number
- CN108443896A CN108443896A CN201810345797.7A CN201810345797A CN108443896A CN 108443896 A CN108443896 A CN 108443896A CN 201810345797 A CN201810345797 A CN 201810345797A CN 108443896 A CN108443896 A CN 108443896A
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- China
- Prior art keywords
- wall
- slag
- refracto
- bottom hopper
- refractory lining
- 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.)
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- 239000002893 slag Substances 0.000 title claims abstract description 49
- 239000003245 coal Substances 0.000 title claims abstract description 21
- 238000002715 modification method Methods 0.000 title claims abstract description 13
- 238000001816 cooling Methods 0.000 claims abstract description 19
- 230000009466 transformation Effects 0.000 claims description 7
- 239000000919 ceramic Substances 0.000 claims description 4
- 229910052593 corundum Inorganic materials 0.000 claims description 4
- 239000010431 corundum Substances 0.000 claims description 4
- 230000006978 adaptation Effects 0.000 claims description 3
- 238000004458 analytical method Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- 238000007634 remodeling Methods 0.000 abstract description 5
- 239000003513 alkali Substances 0.000 abstract description 3
- 230000006872 improvement Effects 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 239000010882 bottom ash Substances 0.000 abstract 1
- 239000000155 melt Substances 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000004927 fusion Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 210000000038 chest Anatomy 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 230000005619 thermoelectricity Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J1/00—Removing ash, clinker, or slag from combustion chambers
Abstract
The invention discloses one kind being suitable for using the anti-slag structure of modification method of accurate eastern coal burning boiler dry bottom hopper, and this method includes：Wall with refractory lining, refracto is laid on dry bottom hopper surface, the slag that melts for preventing from guttering down from vertical water wall is water cooled wall cooling and solidifies and pile up the big clinker that cannot be smoothly discharged in dry bottom hopper formation.Thickness reduces the wall with refractory lining, refracto thickness of laying from high to low, to ensure to be formed the steeper gradient of more former dry bottom hopper without influencing slag-drip opening size, to promote to melt the smooth discharge of slag.Remodeling method of the present invention is simple, and cost is relatively low, it can be achieved that use the smooth discharge of the quasi- high-alkali coal pulverized-coal fired boiler bottom ash in east, can be not only used for new boiler design, it can also be used to which active service boiler improvement avoids the inconvenience manually to remove the gred and security risk.
Description
Technical field
The present invention relates to a kind of deslagging methods, more specifically a kind of to be suitable for using the anti-heap of accurate eastern coal burning boiler dry bottom hopper
Slag structure of modification method.
Background technology
The quasi- high-alkali coal volatile matter content in east is high, and Kazakhstan can grind index and be more than 80, which has good grindability, catches fire
Property and burnout rate, but also there is strong slagging and bonding characteristic simultaneously, and ash fusion point is relatively low, about 1130 ~ 1190 DEG C.It is firing
In pulverized-coal fired boiler operation with the quasi- high-alkali coal in east, due to being rich in alkali metal in coal, water cooling wall surface almost all is by slag in burner hearth
Layer covering, flow to dry bottom hopper, and the cooling solidification at dry bottom hopper along water-cooling wall in molten condition, piles up and form blocking.Certain
Boiler of power plant forms the fluidised form slag of 2 ~ 5 cm when using the coal, in water cooling wall surface, trickles to the inflection point of dry bottom hopper upper end
It is cooled to be piled into bulk slag, it cannot be smoothly discharged to slag well, be forced to open using on piling up place's water-cooling wall fin in operation
Hole is manually removed the gred, and the safe operation of unit and the personal safety of worker are seriously affected.
So developing one kind being suitable for using the anti-slag structure of modification method of accurate eastern coal burning boiler dry bottom hopper, become as industry
The problem of interior personage's urgent need to resolve.
Invention content
1. technical problems to be solved by the inivention
It is an object of the invention to overcome boiler of power plant when using the lower coal quality of ash fusion point, fluidised form is formed in water cooling wall surface
Layer and at the inflection point of dry bottom hopper upper end condensation pile up the problem of forming blocking, provide that a kind of to be suitable for using accurate eastern coal burning boiler cold
The anti-slag structure of modification method of ash bucket, the present invention are suitable for any boiler of power plant for using the relatively low coal quality of ash fusion point, can be in difference
It is adjusted under boiler load and ensures that surface temperature is more than lime-ash stream temperature FT at dry bottom hopper, to enable slag smoothly to slide to slag
Well avoids inconvenience and the security risk of the band that manually removes the gred.
2. technical solution
In order to achieve the above objectives, technical solution provided by the invention is：
One kind of the present invention being suitable for using the anti-slag structure of modification method of accurate eastern coal burning boiler dry bottom hopper, and transformation device is mainly by water
The compositions such as cold wall, burner hearth and dry bottom hopper, the water-cooling wall are cladded with insulating layer, and dry bottom hopper is covered with wall with refractory lining, refracto to fiery side surface,
The lower disposed of burner hearth front wall and rear wall has bottom burner, dry bottom hopper lower end to be equipped with slag well.Specifically adaptation step is：
1）The thickness and the gradient of wall with refractory lining, refracto are established：
The solid slag piled up at the inflection point of boiler dry bottom hopper upper end is sampled before transformation every time, its flowing is surveyed using grey melt analysis instrument
Temperature FT analyzes boiler Temperature Distribution on the water-cooling wall of each load lower hearth lower part, so that it is determined that defending by numerical simulation software
Fire the thickness and the gradient of band；
2）Construction requirement：
Pin is welded with 5 cm of spacing by the gradient and thickness of calculating, lay wall with refractory lining, refracto, while thermocouple monitoring wall with refractory lining, refracto is set
Surface real time temperature；
3）It is monitored in operation：
When load changes boiler during being incorporated into the power networks, if thermocouple detects that wall with refractory lining, refracto surface temperature is less than the stream of slag
When changing temperature FT, then the Coal-fired capacity of bottom burner is increased, is that lower furnace portion temperature increases, the surface temperature of wall with refractory lining, refracto on dry bottom hopper
Stream temperature FT of the degree more than slag.
As further improvement of the present invention, the wall with refractory lining, refracto is with a point B, cold ash on the water-cooling wall of bottom burner lower part
Bucket three points of one point A of lower end and dry bottom hopper upper end inflection point are triangularly arranged for vertex, and the glide slope at the dry bottom hopper of slag has
Originally dry bottom hopper angle with horizontal plane α（About 55 °）Wall with refractory lining, refracto is increased in horizontal plane angle β（About 70 °）, flow slag and flow to wall with refractory lining, refracto
When, slag well can be slided to along angle of inclination.
As further improvement of the present invention, the wall with refractory lining, refracto is using the smooth corundum ceramics in surface.
3. advantageous effect
Using technical solution provided by the invention, compared with the prior art is, have the advantages that：
（1）The remodeling method of the present invention, makes its surface temperature be more than with wall with refractory lining, refracto after transformation to being kept the temperature near dry bottom hopper
Flow slag stream temperature, to make stream slag smoothly slide to dry bottom hopper, avoid at the inflection point of dry bottom hopper top condensation pile up to be formed it is stifled
Plug, enables slag to be successfully discharged to slag well incessantly, has both ensured the steady and continuous operation of unit, has also avoided artificial scarfing cinder
Arduous work, ensured the safety of personnel；
（2）The present invention remodeling method, using triangle arrange wall with refractory lining, refracto, original stream slag flow at the inflection point of dry bottom hopper top have it is cold
Ash bucket angle with horizontal plane is the resistance of α, and angle is increased to wall with refractory lining, refracto surface angle with horizontal plane β after transformation, reduces stream slag
Local resistance during the fall；
（3）The remodeling method of the present invention, wall with refractory lining, refracto use wear-resisting and high temperature resistant corundum ceramics so that the faces AB surface light
It is sliding, and vertical stress component of the slag at dry bottom hopper is increased, reduce on-way resistance of stream slag during wall with refractory lining, refracto surface slides；
（4）The remodeling method of the present invention, application range is wider, can be directed to the boiler of power plant with stream slag phenomenon and quickly be changed
It makes, the transformation period is short, and quantities is smaller, does not change the size d and furnace depth b of slag-drip opening, does not change water-cooled wall.
Description of the drawings
Fig. 1 is anti-slag structure of modification dimensional structure diagram in the present invention；
Fig. 2 is anti-slag structure of modification planar structure schematic diagram in the present invention；
Label declaration in schematic diagram：1, insulating layer；2, water-cooling wall；3, bottom burner；4, wall with refractory lining, refracto；5, slag well；6, thermoelectricity
It is even；7, dry bottom hopper；8, burner hearth.
Specific implementation mode
In order to make structure of modification method, technological means, reached purpose and effect of the present invention be easy to understand, tie below
Conjunction is specifically illustrating, and the present invention is further explained.
Such as Fig. 1, one kind being suitable for using the anti-slag structure of modification method of accurate eastern coal burning boiler dry bottom hopper, including water-cooling wall 2, stove
Thorax 8 and dry bottom hopper 7, insulating layer 1 is cladded in water-cooling wall 2, wall with refractory lining, refracto 4 is covered with to fiery side surface in dry bottom hopper 7, in burner hearth 8
The lower disposed of front wall and rear wall has bottom burner 3,7 lower end of dry bottom hopper to be equipped with slag well 5；Its specific adaptation step is：
1）The thickness and the gradient of wall with refractory lining, refracto are established：
The solid slag piled up at 7 upper end inflection point of boiler dry bottom hopper is sampled before transformation every time, its stream is surveyed using grey melt analysis instrument
Dynamic temperature FT analyzes boiler Temperature Distribution on 8 lower part water-cooling wall of each load lower hearth by numerical simulation software, so that it is determined that
The thickness and the gradient of wall with refractory lining, refracto 4；
2）Construction requirement：
Pin is welded with 5 cm of spacing by the gradient and thickness of calculating, lays wall with refractory lining, refracto 4, while the monitoring of thermocouple 6 is set and defends combustion
4 surface real time temperature of band；
3）It is monitored in operation：
When load changes boiler during being incorporated into the power networks, if thermocouple 6 detects that 4 surface temperature of wall with refractory lining, refracto is less than slag
When stream temperature FT, then the Coal-fired capacity of bottom burner 3 is increased.
Wall with refractory lining, refracto 4 is with a point B, one point A of dry bottom hopper lower end and dry bottom hopper upper end inflection point on 3 lower part water-cooling wall of bottom burner
Three points are triangularly arranged for vertex.
Wall with refractory lining, refracto 4 is designed with certain angle of inclination beta can slide to slag well 5 when stream slag flow to wall with refractory lining, refracto 4 along angle of inclination.
Wall with refractory lining, refracto 4 uses corundum ceramics.
Claims (4)
1. one kind being suitable for using the anti-slag structure of modification method of accurate eastern coal burning boiler dry bottom hopper, including water-cooling wall（2）, burner hearth（8）
And dry bottom hopper（7）, it is characterised in that：The water-cooling wall（2）It is cladded with insulating layer（1）, dry bottom hopper（7）Be covered with to fiery side surface
Wall with refractory lining, refracto（4）, burner hearth（8）The lower disposed of front wall and rear wall has bottom burner（3）, dry bottom hopper lower end is equipped with slag well（5）；Its
Specifically adaptation step is：
1）The thickness and the gradient of wall with refractory lining, refracto are established：
Every time to boiler dry bottom hopper before transformation（7）The solid slag sampling piled up at the inflection point of upper end, it is surveyed using grey melt analysis instrument
Flowing temperature FT analyzes boiler in each load lower hearth by numerical simulation software（8）Temperature Distribution on the water-cooling wall of lower part, to
Determine wall with refractory lining, refracto（4）Thickness and the gradient；
2）Construction requirement：
Pin is welded with 5 cm of spacing by the gradient and thickness of calculating, lays wall with refractory lining, refracto（4）, while thermocouple is set（6）Monitoring
Wall with refractory lining, refracto（4）Surface real time temperature；
3）It is monitored in operation：
When load changes boiler during being incorporated into the power networks, if thermocouple（6）Detect wall with refractory lining, refracto（4）Surface temperature is less than
When the stream temperature FT of slag, then bottom burner is increased（3）Coal-fired capacity.
2. it is suitable for using the anti-slag structure of modification method of accurate eastern coal burning boiler dry bottom hopper according to a kind of described in claims 1,
It is characterized in that：The wall with refractory lining, refracto（4）With bottom burner（3）A point B, one point A of dry bottom hopper lower end and cold ash on the water-cooling wall of lower part
Bucket three points of upper end inflection point are triangularly arranged for vertex.
3. it is suitable for using the anti-slag structure of modification method of accurate eastern coal burning boiler dry bottom hopper according to a kind of described in claims 2,
It is characterized in that：The wall with refractory lining, refracto（4）It is designed with certain angle of inclination beta, stream slag flow to wall with refractory lining, refracto（4）When, it can be slided to along angle of inclination
Slag well（5）.
4. it is suitable for using the anti-slag structure of modification method of accurate eastern coal burning boiler dry bottom hopper according to a kind of described in claims 2,
It is characterized in that：The wall with refractory lining, refracto（4）Using corundum ceramics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810345797.7A CN108443896A (en) | 2018-04-18 | 2018-04-18 | One kind being suitable for using the anti-slag structure of modification method of accurate eastern coal burning boiler dry bottom hopper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810345797.7A CN108443896A (en) | 2018-04-18 | 2018-04-18 | One kind being suitable for using the anti-slag structure of modification method of accurate eastern coal burning boiler dry bottom hopper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108443896A true CN108443896A (en) | 2018-08-24 |
Family
ID=63200113
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810345797.7A Pending CN108443896A (en) | 2018-04-18 | 2018-04-18 | One kind being suitable for using the anti-slag structure of modification method of accurate eastern coal burning boiler dry bottom hopper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108443896A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109958989A (en) * | 2019-04-03 | 2019-07-02 | 李剑 | A kind of boiler evaporating device for steam power plant |
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| CN203836991U (en) * | 2014-03-20 | 2014-09-17 | 刘小英 | Slag removing device for boiler cold ash hopper |
| CN105091320A (en) * | 2014-05-11 | 2015-11-25 | 南通万达锅炉有限公司 | CWS (Coal Water Slurry) hot water boiler system |
| CN205482378U (en) * | 2016-03-21 | 2016-08-17 | 衡南扬钢冶金技术有限公司 | Smelting furnace slag discharging device |
-
2018
- 2018-04-18 CN CN201810345797.7A patent/CN108443896A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101230978A (en) * | 2007-11-30 | 2008-07-30 | 河南中孚实业股份有限公司 | Mode for laying boiler furnace burning guarding belt |
| CN201225611Y (en) * | 2008-04-18 | 2009-04-22 | 四川东方锅炉工业锅炉集团有限公司 | Anti-wear structure of circulating fluid bed boiler water-cooled wall |
| CN203836991U (en) * | 2014-03-20 | 2014-09-17 | 刘小英 | Slag removing device for boiler cold ash hopper |
| CN105091320A (en) * | 2014-05-11 | 2015-11-25 | 南通万达锅炉有限公司 | CWS (Coal Water Slurry) hot water boiler system |
| CN205482378U (en) * | 2016-03-21 | 2016-08-17 | 衡南扬钢冶金技术有限公司 | Smelting furnace slag discharging device |
Non-Patent Citations (1)
| Title |
|---|
| 王文飚: "《单元机组集控技术1000问》", 30 April 2005, 中国电力出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109958989A (en) * | 2019-04-03 | 2019-07-02 | 李剑 | A kind of boiler evaporating device for steam power plant |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
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Application publication date: 20180824 |