CN202561733U - Roller residue cooler aiming at removing 'false coldness' of ash residue - Google Patents
Roller residue cooler aiming at removing 'false coldness' of ash residue Download PDFInfo
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- CN202561733U CN202561733U CN2012201019834U CN201220101983U CN202561733U CN 202561733 U CN202561733 U CN 202561733U CN 2012201019834 U CN2012201019834 U CN 2012201019834U CN 201220101983 U CN201220101983 U CN 201220101983U CN 202561733 U CN202561733 U CN 202561733U
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Abstract
A roller residue cooler aiming at removing 'false coldness' of ash residue is used for the cooling process of high temperature ash residue of a circulating fluidized bed boiler. A radiation heat exchanging section, a convection section and a heat conducting section are mainly arranged on the device along the axial direction of a roller. The roller residue cooler aiming at removing the 'false coldness' of the ash residue considers a heat conducting principle, the particle cooling process of the radiation section, the convection section and the heat conducting section is respectively organized, particularly, a 'heat collecting pond' device is introduced, the shortcoming that a traditional residue cooler is insufficient in capacity output at the ash residue low temperature section is overcome, cooling capacity of the device can be effectively enlarged, capacity output of the roller residue cooler is improved, length of the roller is reduced, and a room for an overhaul channel occupied by the residue cooler is made for a boiler island.
Description
Technical field
The utility model belongs to high-temperature powder cooling field; A kind of novel barrel slag cooler that is used for the high-temperature ash of cool cycles fluidized-bed combustion boiler discharge is provided; Through adopting the measure of eliminating lime-ash " false cold "; The high-temperature ash internal and external temperature is reached unanimity, it is cooled off completely, improve cooling effect greatly.Also can be used as the energy, environmental protection, metallurgy, oil, the cooling device of the high-temperature powder that the commercial plant of industrial circles such as chemical industry is discharged.
Background technology
The high-temperature ash that CFBB is discharged is carried a large amount of physics sensible heats, will cause huge energy dissipation as not recycling.With the thermal power plant CFBB is example; If the slag discharge capacity is 100t/h at the bottom of the 300MW CFBB; These lime-ash are cooled to the temperature a little more than environment by tapping temperature, and boiler efficiency can improve 1%～2%, as the temperature when establishing lime-ash and leaving boiler is 1000 ℃; Final deslagging temperature is 150 ℃, and the lime-ash physics sensible heat that then reclaims is amounted to 18190.37 tons of mark coal/a.Organize the recovery of high-temperature ash used heat and can receive considerable economic benefit.
Eliminate two kinds of only remaining at present fluidized bed slag cooler and barrel slag coolers through technology competition and market.The former utilizes the fluid bed principle, and the physics sensible heat that the pipe laying heating surface absorbs high-temperature ash is set in fluid bed, the latter be utilize the cylinder rotation make high-temperature ash periodically the water-cooling wall of contact roller tube inner surface emit the physics sensible heat.
The fluidized bed slag cooler that large circulating fluidized bed boiler uses is very responsive to particle size, will cause the slag cooler bed that collapses in case particle size surpasses design size, and then cause boiler shutdown, and economic loss is huge.Therefore, barrel slag cooler has obtained development rapidly, and its great advantage is to the particle size paralysis, as long as the particle that boiler can move can cool off in cylinder.The shortcoming of barrel slag cooler is that heat transfer coefficient is low, and cooling capacity is little, for satisfying the cooling requirement of boiler slag removal, must adopt the method that increases heat transfer area, owing to receive a series of technical limitations, conventional at present way is to strengthen barrel slag cooler length.The inconvenience that this has not only caused normal operation of boiler and maintenance also possibly take the boiler island passage, becomes the great hidden of safe operation, and the material consumption also can increase thereupon simultaneously.
Existing barrel slag cooler has multiple pattern, like louvered, multitube, spiral etc.The Chinese patent net shows that the patent about the fluidized-bed combustion boiler barrel slag cooler has about 30 approximately at present, and these slag coolers are to rely on the heat conduction between high-temperature ash and barrel to carry out in the overwhelming majority on the heat exchange mode.The cold slag machine of part has structurally been made improvement, like people's such as Xu Jie patent " rolling-cylinder type slag-cooler " (patent No. CN 201181175Y), changes the lifting blade structure of outer tube inner wall, makes the heat-transfer surface that does not contact with lime-ash be reduced to about 1/3rd; The patent " lifting blade drum slag cooling device " (patent No. CN 201181176Y) of appointing people such as letting has changed the structure of lifting blade, and it is made straight plate or bottom bending type, has strengthened the degree of stirring of granule materials; People's such as Cao Xucheng patent " efficient chilling roll formula slag cooler " (patent No. CN 200979169Y) leading the water pipe that is provided with on the slag blade more than, has improved cooling effect; On the basis of telescopic and water-cooled barrel, these patents mainly are to improve the lifting blade structure, and high-temperature ash is shed downwards along with the rotation of cylinder arrives in the cylinder higher position, and perhaps managing in tube the space increases heat-transfer surface and come enhanced heat exchange.The subject matter that these patents solve comprises two aspect contents: the first, and solve lime-ash and followed the drum movement problem to greatest extent, promptly effectively prolonged the time that lime-ash effectively conducts heat; The second, solved barrel slag cooler bearing capacity problem.The former mainly is reflected in various lifting blades, and the latter is reflected in the water wall structure on the chuck water-cooling structure basis.
Though structurally made various improvement, main still lime-ash particle swarm that the lime-ash cooling is relied on and the heat conduction between barrel.Heat conduction is a kind of diabatic process that depends critically upon the material rerum natura in three kinds of diabatic processes.Compare with convection current with radiation, thermal conduction resistance mainly is apparent on the thermal contact resistance, causes the heat-transfer capability of heat conduction very limited.Convection heat transfer' heat-transfer by convection can improve heat-transfer effect through changing fluid velocity.During barrel slag cooler work, therefore the duty that always exists the part barrel not covered by grey solid impurity particle manages to increase the coverage of lime-ash to cylinder wall, and tissue particles is washed away barrel uniformly will improve the heat exchange effect greatly.The patent of Liu Baiqian " the heat transfer roller slag cooler is washed away in the avalanche type convection current continuously " just is based on this thinking and has designed novel barrel slag cooler.Because ash temperature constantly descends, rely on ability that radiant force reduces particle temperature more and more a little less than.Particularly be lower than after 400 ℃ when particle temperature, the heat that lime-ash carries is difficult to reclaim, if reclaim heat by heat-conducting mode, must the very large heat transfer area of needs, and the perhaps long enough done of cylinder prolongs the cool time of lime-ash in cylinder as much as possible.
The introduction to aspects such as properties of product and corresponding techniques researchs in relevant academic conference of domestic slag cooler main manufacturer is consistent with existing patent content, and the relevant report in the domestic periodical does not exceed the technical scope of above-mentioned patent yet.Because the birthplace of barrel slag cooler is a China, can think does not have relevant technology contents in other language documents.A kind of barrel slag cooler that is intended to eliminate lime-ash " false cold " that the utility model provides; Be on the basis of patent " the heat transfer roller slag cooler is washed away in the avalanche type convection current continuously " (application number 20112059376.3); Introduce " receiving hot pond " device; Overcome the shortcoming of heat conduction section undercapacity; From the cooling procedure of the heat-transfer mechanism tissue particles between particle and wall, cylinder is divided into radiation heat transfer section, convection section and heat conduction section, strengthen the heat exchange of different phase particle and cooling medium according to heat-transfer mechanism.Heat conduction section particle temperature is lower, mainly realizes the dynamic equilibrium that progressively reduces by granule interior heat conduction and the outside heat transfer through outer surface.Because the lime-ash particle diameter of discharging from CFBB is very little; What measure usually all is the temperature of lime-ash outer surface; The temperature of granule interior is difficult to measure; Though but the grey solid impurity particle hull-skin temperature that in fact is discharged to the heat conduction section is very low, lime-ash granule interior temperature is higher than the temperature of outer surface far away, causes " false cold " phenomenon of " the cold meat of skin is not cold ".
To " false cold " phenomenon, introduce " receiving hot pond " device in the heat conduction section of barrel slag cooler, after lime-ash gets into the heat conduction section; Enlarge the contact area of lime-ash and cylinder wall, the cool time of prolongation lime-ash in cylinder, lime-ash is fully cooled off; Reach the purpose that the lime-ash internal and external temperature is reached unanimity, in the exit of barrel slag cooler stock guide is installed simultaneously, discharge lime-ash through thoroughly cooling; Can effectively increase cooling capacity, dwindle drum length.Abdicate maintenance and passageway for fire apparatus for factory building simultaneously, eliminate safe hidden trouble, ensure and produce normal operation.
Summary of the invention
The purpose of the utility model is through introducing " receiving hot pond " device in the heat conduction section of barrel slag cooler, after lime-ash gets into the heat conduction section, play the heat exchange area that increases lime-ash and cylinder wall, prolonging the lime-ash double action of the cool time in cylinder.The lime-ash internal and external temperature is reached unanimity, and lime-ash is fully cooled off, and eliminates " false cold " phenomenon, provides a kind of cooling effect better efficient barrel slag cooler.
Technical scheme is following:
1. roller frame
Along the cylinder axis direction, a kind of barrel slag cooler that is intended to eliminate lime-ash " false cold " is divided into radiant heat transfer section, convection heat transfer' heat-transfer by convection section and conduction heat transfer section.See that with regard to a cross section this slag cooler is divided into inner core and urceolus.Urceolus is the fin panel casing that has lifting blade, and lifting blade cooperates helical duct to organize grey solid impurity particle moving along cylinder axis.
2. the structure of " receiving hot pond "
Arranged " receiving hot pond " device to " false cold " phenomenon this patent in the heat conduction section of cylinder.When lime-ash moved to the heat conduction section under the effect of spiral stream guidance conduit and lifting blade, cylinder urceolus diameter became greatly suddenly, therefore; The heat-transfer surface that cylinder can be arranged increases; The heat convection effect further strengthens, and has played the increase heat exchange area, the effect that prolongs the time of contact of lime-ash and cylinder wall; The lifting blade structure and the drum shaft of this section layout are less to angle simultaneously; Be unfavorable for lime-ash discharge cylinder, further prolong the time of staying of lime-ash in cylinder, eliminate the false cold phenomenon of lime-ash " the cold meat of skin is not cold ".
Described a kind of barrel slag cooler that is intended to eliminate lime-ash " false cold "; High-temperature particle gets into slag cooler from feeding mechanism 1; Behind radiation heat transfer Duan Shiyu fin panel casing radiation heat transfer; Lime-ash enters between inner/outer tube and drum under the drive of swing roller 2, then by lifting blade with the particle water conservancy diversion to groove 8, with convection section fin panel casing heat-shift.Constantly wash away the inner core surface at cylinder convection section high-temperature particle, form effective convection current of particle and fin panel casing 9 surfaces and light-pipe structure 10, can strengthen overall heat exchange effect.In cylinder heat conduction section, the low temperature lime-ash gets into receives hot pool device, and diameter of cylinder increases, and lime-ash advances lime-ash after rotating a period of time with cylinder in the back, and the acting in conjunction of stock guide 3 and marker board 6 relies on gravity to discharge cylinder after arriving particle outlet down.Cooling water 4 gets into from entering the mouth, compile from exporting 5 after absorbing heat through cylinder, and rely on swivel joint the cooling water inlet manage, outlet and swing roller couple together.
The utility model provides, and a kind of barrel slag cooler that is intended to eliminate lime-ash " false cold " mainly is divided into radiation heat transfer section, convection section and heat conduction section.With embodiment 1 is example, and radiant section is main with the radiation heat transfer between particle and wall, and this section inner core is a squirrel-cage light-pipe structure 7, and urceolus is a film water cold wall structure.Convection section advances particle to advance to slag-drip opening through arranging with the lifting blade that axially forms an angle, and facilitates the heat convection between particle and the water-cooled surface, can effectively improve cooling capacity.The heat conduction section is introduced and is received hot pool device, overcomes the shortcoming that traditional slag cooler leans on heat-conducting mode cooling lime-ash undercapacity.
Compared with prior art, the utility model has the advantages that:
1, organizes diabatic process from high-temperature particle and wall heat-transfer mechanism, cylinder is divided into radiation heat transfer section, convection section and heat conduction section.Compare with existing barrel slag cooler; Emphasis has been strengthened the heat convection between radiant heat transfer and particle and wall, and the perfect shortcoming of heat conduction section undercapacity is to the heat transfer mechanism of each section; Take to help most the measure of heat exchange mode, can effectively increase cooling capacity;
2, the ingenious hot pool device of receipts of having arranged the heat conduction section under the constant prerequisite of drum length, has increased the heat exchange area of cylinder, prolongs the cool time of lime-ash in cylinder.
3, according to the variation of ash temperature and every kind of best heat transfer boundary condition that heat exchange mode needs, respectively at the radiant section of barrel slag cooler, convection section, the heat conduction section is arranged differing heights, variety classes, the lifting blade of at least two kinds of patterns, enhanced cooling.
4, under the equal volume prerequisite, can significantly increase effective heat transfer area, improve the heat absorption capacity of device;
5, in the radiation heat transfer section, the radiation characteristic and the radiation falloff characteristic that make full use of high-temperature powder increase the radiation heat transfer amount between particle and the wall;
6,, can dwindle drum length, economical with materials under the constant prerequisite of cylinder leading portion diameter owing to strengthened heat-transfer effect.Can be factory building simultaneously and abdicate access path, eliminate safe hidden trouble, ensure and produce normal operation.
7, owing to obviously improved heat transfer coefficient and increased heat transfer area, prolong the lime-ash time of staying, therefore can effectively improve the lime-ash treating capacity.
Description of drawings
Fig. 1 is the structural representation of the utility model;
Fig. 2 is the A-A sectional drawing (radiant section section) of Fig. 1 middle cylinder body;
Fig. 3 is the B-B sectional drawing (convection section section) of Fig. 1 middle cylinder body;
Fig. 4 is the C-C sectional drawing (heat conduction section section) of Fig. 1 middle cylinder body;
Fig. 5 is that the B of Fig. 1 middle cylinder body is to view (left view);
Fig. 6 is that the C of Fig. 1 middle cylinder body is to view (right view);
Among the figure: 1. feeding mechanism, 2. swing roller, 3. stock guide, 4. cooling water population, 5. coolant outlet, 6. marker board, 7. squirrel-cage light-pipe structure, 8. groove 9. fin panel casings, 10. light-pipe structure.
The specific embodiment
Below in conjunction with embodiment the utility model is described.
Embodiment 1: design parameter: 850 ℃ of ash temperature are cooled to 150 ℃
A kind of drum slag cooling captain 4.5m that is intended to eliminate lime-ash " false cold ", water-cooled urceolus diameter 1.2m, inner core effective diameter 0.8m; Radiation heat transfer segment length 1.5m; Along 45 water cooling tubes of urceolus circumference; Diameter 50mm, two tube hub wire clamp angles are 8 °, and form membrane wall with the welding of 5mm steel plate between two pipes; Strengthen radiation heat exchange between particle and wall, the vertical tube wall of direction at the thick square steel plate of welding 5mm fin on the water cooling tube of this membrane wall simultaneously; In the heat convection section, arrange 48 water cooling tubes altogether along the inner core circumference, evenly arrange nine on each groove walls; Welding 5mm steel plate is as the heat convection fin between same per two water cooling tubes; Inner core is provided with 3 grooves altogether, the dark 0.3m of groove, and the recess edge setting is held grey sheet and is accepted the particle that the urceolus lifting blade is shed; The thick bottom bending of welding 5mm steel plate bends towards identical with the cylinder direction of rotation as lifting blade on the urceolus membrane wall water cooling tube of this section simultaneously.Heat conduction heat exchange segment length 1m,, urceolus diameter 1.7m, along 60 water cooling tubes of urceolus circumference, diameter 50mm, two tube hub wire clamp angles are 8 °, and form membrane wall with the welding of 5mm steel plate between two pipes.
The key concept of the utility model is to arrange " receiving hot pond " device in the heat conduction section of cylinder, increases the heat exchange area of cylinder and lime-ash, strengthens the heat convection effect, the cool time of prolongation lime-ash in cylinder.Any embodiment based on the utility model thinking all belongs within the protection domain of the utility model.
Claims (4)
1. barrel slag cooler that is intended to eliminate lime-ash " false cold ", it is characterized in that: barrel slag cooler is divided into radiation heat transfer section, convection section and heat conduction section vertically.
2. according to the said a kind of barrel slag cooler that is intended to eliminate lime-ash " false cold " of claim 1, it is characterized in that: the heat conduction section is introduced and is received hot pool device, promptly increases heat conduction section urceolus diameter, and interior stock guide (3) and the marker board (6) arranged of tube assisted discharge.
3. according to the said a kind of barrel slag cooler that is intended to eliminate lime-ash " false cold " of claim 1, it is characterized in that: respectively at the radiant section of roller slag cooler, convection section, the heat conduction section is arranged differing heights, variety classes, the lifting blade of at least two kinds of patterns.
4. according to the said a kind of barrel slag cooler that is intended to eliminate lime-ash " false cold " of claim 1, it is characterized in that: see that with regard to a cross section barrel slag cooler is divided into inner core and urceolus, urceolus is the fin panel casing that has lifting blade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201019834U CN202561733U (en) | 2012-03-19 | 2012-03-19 | Roller residue cooler aiming at removing 'false coldness' of ash residue |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201019834U CN202561733U (en) | 2012-03-19 | 2012-03-19 | Roller residue cooler aiming at removing 'false coldness' of ash residue |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202561733U true CN202561733U (en) | 2012-11-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201019834U Expired - Fee Related CN202561733U (en) | 2012-03-19 | 2012-03-19 | Roller residue cooler aiming at removing 'false coldness' of ash residue |
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| Country | Link |
|---|---|
| CN (1) | CN202561733U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103322560A (en) * | 2012-03-19 | 2013-09-25 | 刘柏谦 | Roller type slag cooler for eliminating false cooling of ash slag |
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2012
- 2012-03-19 CN CN2012201019834U patent/CN202561733U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103322560A (en) * | 2012-03-19 | 2013-09-25 | 刘柏谦 | Roller type slag cooler for eliminating false cooling of ash slag |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121128 Termination date: 20190319 |