CN103322560B - It is a kind of to be intended to eliminate the false cold barrel slag cooler of lime-ash - Google Patents
It is a kind of to be intended to eliminate the false cold barrel slag cooler of lime-ash Download PDFInfo
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- CN103322560B CN103322560B CN201210071541.4A CN201210071541A CN103322560B CN 103322560 B CN103322560 B CN 103322560B CN 201210071541 A CN201210071541 A CN 201210071541A CN 103322560 B CN103322560 B CN 103322560B
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- ash
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Abstract
One kind is intended to eliminate the barrel slag cooler of lime-ash " false cold ", is used for the high-temperature ash cooling procedure of circulating fluidized bed boiler.The device is axially broadly divided into radiation heat transfer section, convection section and heat conduction section along roller.One kind provided by the invention is intended to eliminate heat-transfer mechanism of the barrel slag cooler of lime-ash " false cold " between particle and wall, tissue radiation section respectively, convection section, the cooling procedure of heat conduction section particle overcomes traditional slag cooler the lime-ash low-temperature zone undercapacity the shortcomings that especially by introduction " receiving hot pond " device, can effectively aggrandizement apparatus cooling capacity, it improves barrel slag cooler to contribute, reduces drum length, can be that boiler island concedes the access path occupied by lag cooler.
Description
Technical field
The invention belongs to high-temperature powder cooling fields, provide a kind of high temperature for the discharge of cooling cycle fluidized-bed combustion boiler
The Novel rotary drum lag cooler of lime-ash makes high-temperature ash internal and external temperature reach unanimity by using the measure for eliminating lime-ash " false cold ",
So that it is thoroughly cooled down, greatly improves cooling efficiency.The energy is can also be used as, environmental protection is metallurgical, oil, the industry neck such as chemical industry
The cooling device of the high-temperature powder of the commercial plant discharge in domain.
Background technology
The high-temperature ash of circulating fluidized bed boiler discharge carries a large amount of physical sensible heats, if do not recycle will result in it is huge
Energy dissipation.By taking the circulating fluidized bed boiler of thermal power plant as an example, if 300MW CFB Slag discharge capacitys are
These lime-ash, are cooled to slightly above the temperature of environment by 100t/h by tapping temperature, and boiler efficiency can improve 1%~2%, and
And the conservation of fuel of separate unit stove is up to (2~2.5) ten thousand tons/(5000~6000) hour.Organize returning for high-temperature ash waste heat
Receipts can receive considerable economic benefit.
By technology competition and market, only two kinds of remaining fluidized bed slag cooler and barrel slag cooler at present.The former is
Using fluidized bed principle, the physical sensible heat that pipe laying heating surface absorbs high-temperature ash is set in a fluidized bed, the latter is to utilize roller
The water-cooling wall that rotation makes high-temperature ash periodically contact drum inner surface releases physical sensible heat.
The fluidized bed slag cooler that large circulating fluidized bed boiler uses is very sensitive to particle size, once particle size is super
It crosses design size and will result in slag cooler and collapse bed, and then cause boiler shutdown, economic loss is huge.Therefore, barrel slag cooler obtains
Rapid development is arrived, great advantage is benumbed to particle size, as long as the particle that boiler can be run can be in roller
It is cooled down.The shortcomings that barrel slag cooler is that heat transfer coefficient is low, and cooling capacity is small, is required to meet the cooling of boiler slag removal, must
It must be using the method for increasing heat transfer area, since by a series of technology restrictions, conventional way is to increase drum slag cooling at present
Captain's degree.This not only causes the inconvenience of boiler normal operation and maintenance, it is also possible to occupy boiler island channel, become safe operation
Huge hidden danger, while material consumption can also increase therewith.
Existing barrel slag cooler is such as louvered, multitube, spiral there are many pattern.Chinese patent net shows, mesh
For the preceding patent about fluidized-bed combustion boiler barrel slag cooler there are about 30, these slag coolers are mostly to rely on heat exchange mode
Heat conduction between high-temperature ash and barrel carries out.Part lag cooler is made that improvement in structure, such as the patent of Xu Jie et al.
《Rolling-cylinder type slag-cooler》(patent No. CN 201181175Y), changes the lifting harden structure of outer tube inner wall so that do not contacted with lime-ash
Heat-transfer surface be reduced to about one third；Appoint the patent allowed et al.《Drum-type slag cooling device of material raising》(patent No. CN
201181176Y), the structure for changing lifting blade is made straight panel or lower part bending type, increases stirring for granule materials
Degree；Patent clear et al. Cao Xu《Cylinder cinder cooling device of high-efficient cooling》(patent No. CN 200979169Y), in slag blade
One or more water pipe is set, cooling effect is improved；On the basis of telescopic and water cooling barrel, these patents mainly change
Into lifting harden structure, high-temperature ash is set to be shed downwards as the rotation of roller reaches higher position in roller, or try in cylinder
Interior space increases heat-transfer surface and carrys out enhanced heat exchange.The main problem that these patents solve includes two aspect contents：First, it solves
Lime-ash follows drum movement problem to greatest extent, i.e., effectively extends the time that lime-ash effectively conducts heat；Second, it is cold to solve roller
Slag machine bearing capacity problem.The former is mainly reflected in various lifting blades, and the latter is reflected in the water cooling on the basis of chuck water-cooling structure
Wall construction.
Although being made that various improvement in structure, lime-ash cools down the main or lime-ash particle swarm and barrel relied on
Between heat conduction.Heat conduction is that a kind of diabatic process of substance physical property is depended critically upon in three kinds of diabatic processes.With radiation and convection current phase
Than thermal conduction resistance is mainly apparent in thermal contact resistance, causes the heat-transfer capability of heat conduction very limited.Convection current heat transfer can be by changing
Fluid speed improves heat-transfer effect.When barrel slag cooler works, always there is what part barrel was not covered by grey solid impurity particle
Working condition, therefore try to increase lime-ash to the coverage area of cylinder wall, tissue particles uniformly wash away barrel will be significantly
Improve heat transfer effect.Patent modest Liu Bai《Heat transfer roller slag cooler is washed away in continuous avalanche type convection current》This thinking is namely based on to set
Novel rotary drum lag cooler is counted.Since ash temperature constantly declines, the ability that particle temperature is reduced by radiant force is more and more weaker.
Especially after particle temperature is less than 300 DEG C, the heat that lime-ash carries is difficult recycling, if recycling heat by heat-conducting mode
Amount, is necessarily required to the long enough that very big heat transfer area or roller are done, and extends cooling of the lime-ash in roller as far as possible
Time.
Domestic slag cooler main manufacturer is in related academic conference to the side such as properties of product and corresponding technical research
The introduction in face is consistent with existing patent content, and the relevant report in domestic periodical is also without departing from the technology of above-mentioned patent
Range.Since the birthplace of barrel slag cooler is China, it is believed that there is no relevant technology contents in other language documents.This
One kind that invention provides is intended to eliminate the barrel slag cooler of lime-ash " false cold ", be《Heat transfer roller is washed away in continuous avalanche type convection current
Slag cooler》On the basis of, the shortcomings that introducing " receiving hot pond " device, overcome heat conduction section undercapacity, between particle and wall
Heat-transfer mechanism is set out the cooling procedures of tissue particles, roller is divided into radiation heat transfer section, convection section and heat conduction section, according to heat-transfer machine
Reason strengthens the heat exchange of different phase particle and cooling medium.Heat conduction section particle temperature is relatively low, mainly by heat conduction inside particle and
The dynamic equilibrium gradually reduced is realized by the outside heat transfer of outer surface.Due to the lime-ash grain size being discharged from circulating fluidized bed boiler
Very little, what is usually measured is all the temperature of lime-ash outer surface, and the temperature inside particle is difficult to measure, but be actually discharged to heat conduction section
Although lime-ash particle exterior surface temperature it is very low, grey solid impurity particle internal temperature be significantly larger than outer surface temperature, cause " Pi Leng
Meat is not cold " " false cold " phenomenon.
For " false cold " phenomenon, " receiving hot pond " device is introduced in the heat conduction section of barrel slag cooler, enters heat conduction section in lime-ash
Afterwards, expand the contact area of lime-ash and cylinder wall, extend cooling time of the lime-ash in roller, so that lime-ash is fully cooled, reach
The purpose for making lime-ash internal and external temperature reach unanimity, while stock guide being installed in the exit of barrel slag cooler, by thoroughly cold
But lime-ash discharge, can effectively increase cooling capacity, reduce drum length.Maintenance and passageway for fire apparatus are conceded for workshop simultaneously, is disappeared
Except security risk, production normal operation is ensured.
Invention content
The purpose of the present invention is introducing " receiving hot pond " device by the heat conduction section in barrel slag cooler, enter heat conduction in lime-ash
The heat exchange area for playing a dual role of increasing lime-ash and cylinder wall after section extends cooling time of the lime-ash in roller.Finally
Lime-ash internal and external temperature is set to reach unanimity, lime-ash is adequately cooled, and eliminates " false cold " phenomenon, it is better to provide a kind of cooling effect
Efficient barrel slag cooler.
Technical solution is as follows：
1. roller frame
Along cylinder axis direction, the barrel slag cooler that one kind being intended to eliminate lime-ash " false cold " is divided into radiant heat transfer section, right
Spread hot arc and conduction heat transfer section.One section is seen that the slag cooler is divided into inner barrel and outer barrel.Outer barrel is the film with lifting blade
Formula water-cooling wall, lifting blade coordinate helical duct tissue ash solid impurity particle along the movement of cylinder axis.
" 2. receiving hot pond " structure
For " false cold " phenomenon this patent " receiving hot pond " device is arranged in the heat conduction section of roller.Lime-ash is in spiral stream guidance slot
When moving to heat conduction section under the action of road and lifting blade, roller outer barrel diameter becomes larger suddenly, therefore, the heat-transfer surface that roller can be arranged
Increase, heat convection effect further enhances, and plays increase heat exchange area, extends the work of the time of contact of lime-ash and cylinder wall
With, while lifting harden structure and the roller axial angle of this section of arrangement are smaller, are unfavorable for lime-ash discharge roller, further extend grey
Residence time of the slag in roller eliminates the cold phenomenon of vacation of lime-ash " the cold meat of skin is not cold ".
Described one kind is intended to eliminate the barrel slag cooler of lime-ash " false cold ", and high-temperature particle enters cold slag from feeding mechanism 1
Device, after radiation heat transfer Duan Shiyu fin panel casing radiation heat transfers, lime-ash enters inner/outer tube under the drive of rotating cylinder 2
Between and drums inside exchange heat with convection section fin panel casing then by lifting blade by particle water conservancy diversion to groove 8.In roller
Convection section high-temperature particle constantly washes away inner cylindrical surface, forms the effective right of particle and 9 surface of fin panel casing and light-pipe structure 10
Stream, can enhance overall heat transfer effect.In roller heat conduction section, low temperature lime-ash, which enters, receives hot pool device, and diameter of cylinder increases, lime-ash with
After roller rotates a period of time, lime-ash is promoted below, after reaching particle outlet under the collective effect of stock guide 3 and marker board 6,
Roller is discharged by gravity.Cooling water enters from entrance 4, collects from outlet 5 after roller absorbs heat, and connect by rotation
First cooling water inlet pipe, outlet and rotating cylinder connect.
The barrel slag cooler that one kind provided by the invention is intended to eliminate lime-ash " false cold " is broadly divided into radiation heat transfer section, convection current
Section and heat conduction section.By taking embodiment 1 as an example, for radiant section based on the radiation heat transfer between particle and wall surface, this section of inner cylinder is squirrel-cage
Light-pipe structure 7, outer barrel are film water cold wall structure.Convection section promotes particle by arranging with the lifting blade axially to form an angle
Advance to slag-drip opening, facilitates the heat convection between particle and water-cooled surfaces, cooling capacity can be effectively improved.Heat conduction section, which introduces, to be received
Hot pool device overcomes the shortcomings that traditional slag cooler is by heat-conducting mode cooling lime-ash undercapacity.
Compared with prior art, it is an advantage of the invention that：
1, from high-temperature particle and wall heat transfer mechanism tissue diabatic process, roller is divided into radiation heat transfer section, convection current
Section and heat conduction section.Compared with existing barrel slag cooler, emphasis enhances the heat convection between radiant heat transfer and particle and wall, complete
The shortcomings that being apt to heat conduction section undercapacity takes the measure most beneficial for heat exchange mode for each section of heat transfer mechanism, can
Effectively increase cooling capacity；
2, the ingenious hot pool device of the receipts for arranging heat conduction section, under the premise of drum length is constant, increases the heat exchange of roller
Area extends cooling time of the lime-ash in roller.
3, the best heat transfer boundary condition needed according to the variation of ash temperature and each heat exchange mode, respectively in drum slag cooling
The radiant section of machine, convection section, heat conduction section arrange that different height, variety classes, the lifting blade of at least two patterns enhance cooling effect
Fruit.
4, under the premise of same volume, effective heat transfer area can be dramatically increased, improves the heat absorption capacity of device；
5, in radiation heat transfer section, radiation characteristic and the radiation falloff characteristic of high-temperature powder is made full use of to increase particle and wall
Radiant exothermicity between face；
6, due to enhancing heat-transfer effect, drum length can be reduced under the premise of roller leading portion diameter is constant, saves material.
It can be that workshop concedes access path simultaneously, eliminate safe hidden trouble, ensure production normal operation.
7, due to significantly improving heat transfer coefficient and increasing heat transfer area, the lime-ash residence time is extended, therefore can be with
Effectively improve lime-ash treating capacity.
Description of the drawings
Fig. 1 is the structural schematic diagram of the present invention；
Fig. 2 is the A-A cross-section diagrams (radiant section section) of Fig. 1 middle cylinder bodies；
Fig. 3 is the B-B cross-section diagrams (convection section section) of Fig. 1 middle cylinder bodies；
Fig. 4 is the C-C cross-section diagrams (heat conduction section section) of Fig. 1 middle cylinder bodies；
Fig. 5 is the B direction views (left view) of Fig. 1 middle cylinder bodies；
Fig. 6 is the C direction views (right view) of Fig. 1 middle cylinder bodies；
In figure：1. feeding mechanism, 2. rotating cylinders, 3. stock guides, 4. cooling water inlets, 5. cooling water outlets, 6. discharges
Plate, 7. squirrel-cage light-pipe structures, 8. groove, 9. fin panel casing, 10. light-pipe structures.
Specific implementation mode
With reference to examples illustrate the present invention.
Embodiment 1：Design parameter：850 DEG C of ash temperature, is cooled to 150 DEG C
One kind is intended to eliminate the drum slag cooling captain 4.5m of lime-ash " false cold ", water cooling outer barrel diameter 1.2m, and inner cylinder is effectively straight
Diameter 0.8m；Radiation heat transfer segment length 1.5m, along 45 water cooling tubes of outer barrel circumference, diameter 50mm, two tube hub line angles are 8 °,
And two are welded to form membrane wall with 5mm steel plates between pipe, while 5mm thickness square steel is welded on the water cooling tube of the membrane wall
Plate fin reinforces radiation heat transfer between particle and wall surface, the vertical tube wall in direction；In heat convection section, 48 are arranged altogether along inner cylinder circumference
Root water cooling tube is evenly arranged nine in each groove walls, and welding 5mm steel plates are as heat convection between same every two water cooling tubes
Fin, inner cylinder are equipped with 3 grooves, groove depth 0.3m altogether, and recess edge setting holds grey piece and accepts the particle that outer barrel lifting blade is shed,
Welding 5mm thickness lower part bends steel plate as lifting blade on the outer barrel membrane wall water cooling tube of this section simultaneously, bends towards and roller rotation side
To identical.Heat conduction exchanges heat segment length 1m, outer barrel diameter 1.7m, along 60 water cooling tubes of outer barrel circumference, diameter 50mm, in two pipes
Heart wire clamp angle is 8 °, and welds to form membrane wall with 5mm steel plates between two pipes.
Core of the invention concept is heat conduction section arrangement " receiving hot pond " device in roller, increases the heat exchange of roller and lime-ash
Area strengthens heat convection effect, extends cooling time of the lime-ash in roller.Any embodiment party based on thinking of the present invention
Formula, all belong to the scope of protection of the present invention within.
Claims (1)
1. one kind is intended to eliminate the barrel slag cooler of lime-ash " false cold ", it is characterised in that：Including feeding mechanism (1), rotating cylinder
(2), stock guide (3), cooling water inlet (4), cooling water outlet (5), marker board (6), squirrel-cage light-pipe structure (7), groove (8)
And water cooling tube, along cylinder axis direction, which is divided into radiant heat transfer section, convection current heat transfer segment and conduction heat transfer section, described
Rotating cylinder (2) includes the inner barrel and outer barrel of coaxial arrangement, and the outer barrel includes multiple water cooling tubes circumferentially, adjacent described
It is provided with steel plate between water cooling tube, lifting blade is provided on the multiple water cooling tube, the lifting blade is with axial direction into angle
The steel plate of lower part bending；The feeding mechanism (1) is arranged in one end of the rotating cylinder (2), and the stock guide (3) is set to
The inside of the other end of the rotating cylinder (2)；The cooling water inlet (4), the cooling water outlet (5) and the marker board
(6) on the end face that may be contained within the other end of the rotating cylinder (2), the inner cylinder of the radiant heat transfer section is squirrel-cage light pipe knot
Structure (7) is evenly arranged with multiple grooves (8) on the inner wall of the inner cylinder of the convection current heat transfer segment；In roller conduction heat transfer section, roller
Diameter, which becomes larger to be formed, receives hot pool device, and low temperature lime-ash, which enters, receives hot pool device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210071541.4A CN103322560B (en) | 2012-03-19 | 2012-03-19 | It is a kind of to be intended to eliminate the false cold barrel slag cooler of lime-ash |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210071541.4A CN103322560B (en) | 2012-03-19 | 2012-03-19 | It is a kind of to be intended to eliminate the false cold barrel slag cooler of lime-ash |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103322560A CN103322560A (en) | 2013-09-25 |
| CN103322560B true CN103322560B (en) | 2018-09-04 |
Family
ID=49191479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210071541.4A Expired - Fee Related CN103322560B (en) | 2012-03-19 | 2012-03-19 | It is a kind of to be intended to eliminate the false cold barrel slag cooler of lime-ash |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103322560B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT201600116956A1 (en) | 2016-11-18 | 2018-05-18 | Steb S R L | SYSTEM AND METHOD OF COOLING AND RECOVERY OF WHITE SCORIA USED IN STEEL PROCESSES |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7464669B2 (en) * | 2006-04-19 | 2008-12-16 | Babcock & Wilcox Power Generation Group, Inc. | Integrated fluidized bed ash cooler |
| CN201335630Y (en) * | 2009-01-08 | 2009-10-28 | 南京科臣节能设备有限公司 | Constant-temperature lifting blade roller type slag cooler |
| CN201935617U (en) * | 2011-01-10 | 2011-08-17 | 刘柏谦 | Roller-type high-temperature-powder cooling device |
| CN202561733U (en) * | 2012-03-19 | 2012-11-28 | 刘柏谦 | Roller residue cooler aiming at removing 'false coldness' of ash residue |
-
2012
- 2012-03-19 CN CN201210071541.4A patent/CN103322560B/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN103322560A (en) | 2013-09-25 |
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Granted publication date: 20180904 Termination date: 20200319 |