CN214095683U - High-efficiency long-life low-coking low-blockage regenerator - Google Patents
High-efficiency long-life low-coking low-blockage regenerator Download PDFInfo
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- CN214095683U CN214095683U CN202021200973.7U CN202021200973U CN214095683U CN 214095683 U CN214095683 U CN 214095683U CN 202021200973 U CN202021200973 U CN 202021200973U CN 214095683 U CN214095683 U CN 214095683U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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Abstract
The utility model belongs to the technical field of regenerators, in particular to a high-efficiency long-life low-coking low-blockage regenerator, which comprises a flue gas inlet pipeline, a regenerator wall and a flue gas outlet pipeline which are arranged in the same direction, wherein a container formed by the regenerator wall comprises a large number of regenerator balls, the flue gas inlet area and the smoke outlet area adopt regenerator balls with large particle size, and the particle size of the regenerator balls in the middle section of the regenerator is gradually reduced along the flow direction of flue gas; the design scheme that the particle size of the heat storage ball is gradually reduced along the flow direction of the flue gas is adopted in the middle section of the heat storage chamber, so that the fragmentation probability of the heat storage ball caused by thermal stress can be greatly reduced, the service life of the heat storage ball is obviously prolonged, and the period of replacing the heat storage ball in the service of the heat storage chamber is prolonged; the flue gas inlet pipeline, the wall of the heat storage chamber and the flue gas outlet pipeline can be arranged in the same direction; and above-mentioned technical scheme need not inject and intake and exhaust vertically stagger, the staff's operation and use of being more convenient for.
Description
Technical Field
The utility model belongs to the technical field of the regenerator, concretely relates to low coking low-blocking regenerator of high-efficient long-life.
Background
The heat accumulating type high temperature air combustion technology is used for remarkably improving the combustion efficiency and saving a large amount of energy by recovering the energy of the waste gas discharged by combustion and preheating combustion elements (fuel and air) by the aid of the energy of the waste gas discharged by combustion because the temperature of the discharged waste gas is very high. The data show that the output of the furnace can be improved by 2% and the fuel can be saved by 5% when the air preheating temperature is improved by 100 ℃. The heat accumulating type combustion has the advantages that the preheating temperature of air is up to more than 1000 ℃, the output of the furnace can be improved by more than 20% compared with the direct combustion, and the fuel is saved by more than 50%. In addition, the heat accumulating type combustion can adopt low-heat-value fuel, so that the fuel cost is obviously reduced; can be combined with the oxygen-deficient combustion technology, and the emission of nitrogen oxides is obviously reduced; the burning loss of the materials can be reduced, and the burning noise is reduced; the temperature distribution of the hearth can be more uniform, and the heating quality is higher; the dust emission in the exhaust gas can be remarkably reduced. Therefore, the heat accumulating type high-temperature air combustion technology is widely popularized in industrial kilns in China at present.
However, the prior advanced heat accumulating type high-temperature air combustion technical patents are mastered in European and American multinational enterprises in a large quantity, and the independent innovation of scientific and technical personnel in China is urgently needed in the field; the existing heat storage chamber is mainly filled with heat storage balls with a single size, and the following problems often occur in use:
the flue gas inlet area is easily blocked by soot. The flue gas generated by combustion contains certain solid particles, and when the solid particles enter the regenerator from the flue gas inlet, the pores among the regenerator balls are very small, so that blockage is easily formed.
② the smoke outlet area is easy to coke. Contain certain sulphide in the flue gas that the burning produced, when the heat transfer of flue gas is for the heat accumulation ball, the temperature of flue gas can continuously descend, and regional flue gas temperature of exhaust port drops to minimumly, and if the temperature is low then the sulphide can condense this moment, forms the coke-shaped object of high viscosity, blocks up the passageway.
Thirdly, the heat storage ball is easy to crack and needs to be replaced regularly. When the heat storage chamber works, high-temperature waste gas and low-temperature air periodically and alternately enter the heat storage chamber, so that the fatigue failure of the heat storage ball is caused under the thermal stress. The broken heat accumulating ball will block the passage seriously and deteriorate the working performance of the heat accumulating chamber, so that the heat accumulating ball needs to be replaced regularly.
Fourthly, the channel in the heat storage chamber is not fully utilized, and the efficiency is lower. The pores formed by the accumulation of the heat accumulation balls form a large number of channels in the heat accumulation chamber, but the channels in the heat accumulation chamber are not fully utilized and the efficiency is low because only one air inlet channel and one air exhaust channel are provided.
In order to solve the above 4 problems, the patent with patent number CN 106133470 a, which was filed by siemens 2016 in 2016, is a technology that a regenerator is divided into an upper section and a lower section, the lower section is used for air intake, uniform large-particle-size heat storage balls are used, the upper section is used for heat exchange and exhaust, and uniform small-particle-size heat storage balls are used. However, the patent still fails to completely improve the above problems, and some problems are exposed, for example, in the technical scheme: firstly, horizontal air intake and exhaust are required; secondly, air inlet and exhaust need to be vertically staggered; resulting in the use of the regenerator that remains inconvenient.
The present invention aims to improve the above 4 problems.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems in the prior art, the utility model provides a regenerator with high efficiency, long service life, low coking and low obstruction, which is characterized in that.
In order to achieve the above object, the utility model provides a following technical scheme: a high-efficiency long-life low-coking low-blockage regenerator comprises a flue gas inlet pipeline, regenerator walls, a flue gas outlet pipeline, a flue gas inlet area, a regenerator middle section and a flue gas outlet area which are arranged in the same direction, wherein a container formed by the regenerator walls comprises a large number of regenerator balls, the flue gas inlet area and the flue gas outlet area adopt regenerator balls with large particle sizes, and the particle sizes of the regenerator balls in the regenerator middle section are gradually reduced along the flow direction of flue gas; according to the technical scheme, the heat storage chamber is designed into at least three sections, not only the flue gas inlet section adopts heat storage balls with large particle size, but also the middle section of the heat storage chamber adopts heat storage balls with small particle size, and further, the smoke outlet area also adopts heat storage balls with large particle size; the particle size of the heat storage balls at the middle section of the heat storage chamber further changes along the flowing direction of the flue gas.
As the utility model discloses a preferred technical scheme of low coking low-blocking regenerator of high-efficient long-life, flue gas inlet pipeline links to each other with the combustion chamber, and places with regenerator axis parallel.
As the utility model discloses a preferred technical scheme of low coking low blockage regenerator of high-efficient long-life, the exhanst gas outlet pipeline communicates with each other with the atmosphere, and places with regenerator axis parallel.
As the utility model discloses a preferred technical scheme of low coking low-blocking regenerator of high-efficient long-life, the regenerator wall is the vertical cylindrical section of thick bamboo wall of placing.
As the utility model discloses a preferred technical scheme of low coking low blockage regenerator of high-efficient long-life, the inner chamber that the regenerator wall formed is filled to the heat accumulation ball, and is ceramic heat accumulation ball, and ceramic heat accumulation ball's particle diameter is 10mm-30 mm.
As the utility model discloses a preferred technical scheme of low coking low-blockage regenerator of high-efficient long-life, there are corundum, mullite, carborundum, or clay in the ceramic heat accumulation ball.
As the utility model discloses a preferred technical scheme of low coking low blockage regenerator of high-efficient long-life, big particle size is for regenerator ball particle size that regenerator middle section corresponds for being big.
As the utility model discloses a preferred technical scheme of low coking low-blocking regenerator of high-efficient long-life, flue gas flow direction is from flue gas entry to exhanst gas outlet, flows along regenerator axis direction.
As the utility model discloses a preferred technical scheme of low coking low-blockage regenerator of high-efficient long-life, can adopt the metal mesh to be separated by between regenerator wall section and the section, adopt flange joint.
Aiming at the problem that the smoke inlet area of the regenerator is easily blocked by the soot, through fluid mechanics analysis, when the heat storage ball with large particle diameter is adopted, although the number of pore channels formed by stacking the heat storage ball is reduced, the overflowing area of a single pore channel is obviously increased, so that the smoke particles can conveniently pass through, and the risk of blocking the smoke inlet is obviously reduced. Therefore, the invention adopts the heat storage ball with large particle size in the flue gas inlet area. When the smoke dust leaves the smoke inlet and enters the middle section of the regenerator, the smoke dust is captured due to the reduction of the particle size of the heat storage balls, so that a part of pore channels are blocked, but the number of the pore channels is greatly increased after the smoke dust enters the middle section of the regenerator, and a part of channels are blocked, so that the influence is not caused. Therefore, the invention adopts the heat storage ball with large particle diameter in the flue gas inlet area, and essentially transfers the soot blockage from the high-risk flue gas inlet area to the low-risk middle section area of the heat storage chamber. This risk transfer improves the safety and reliability of the system operation.
Aiming at the problem that the area of the smoke outlet is easy to coke, physical and hydrodynamic analysis shows that the viscosity of sulfur-containing smoke is obviously increased at low temperature, the flow loss is obviously increased when the sulfur-containing smoke passes through small pores, and the sulfur-containing smoke is easy to adhere to the pore walls to form coke and block the channels. Therefore, the scheme of adopting the heat storage balls with large particle size in the smoke exhaust port area is adopted, so that the surface area of the channel is reduced, the attachment area is reduced, the diameter of the channel is increased, the overflowing speed is increased, and the sulfur-containing smoke can smoothly pass through the heat storage balls.
Aiming at the problems that the heat storage balls are easy to crack and need to be replaced regularly, through heat transfer analysis, if the heat storage balls filled in the heat storage chamber adopt the same particle size in the conventional technology, the heat storage balls closer to a flue gas inlet pipeline heat up faster due to larger temperature difference, and only when the heat storage balls in the flue gas inlet area heat up to be close to saturation, the heat storage balls far away from the flue gas inlet are heated up quickly, so the temperature rise of the heat storage balls in the heat storage chamber in the conventional technology is not synchronous, the efficiency of the heat storage chamber is lower, and the temperature gradient born by a single heat storage ball is large. The invention adopts large particle size near the smoke discharge port, and integrally reduces the particle size of the heat storage ball along the smoke flowing direction, thereby achieving the effect of synchronous temperature rise of the heat storage ball, increasing the efficiency of the heat storage chamber, and obviously reducing the temperature gradient of a single heat storage ball in the smoke discharging stage, thereby obviously reducing the problem of heat storage ball fragmentation caused by rapid temperature rise and expansion of the heat storage ball. However, when the reversing valve works after a period of time, the flow is reversed, cold air enters the heat storage chamber, and the heat of the heat storage balls is absorbed, the heat storage balls with small particle sizes in the middle section of the heat storage chamber are closer to the flue gas outlet pipeline, and can bear larger temperature gradient than the design of uniform particle sizes, but because the heat storage balls are cooled at the moment, the thermal stress is compressive stress, and structural mechanics analysis shows that the compressive stress can obviously reduce the probability of the heat storage balls in cracking.
Aiming at the problems that the channels in the heat storage chamber are not fully utilized and the efficiency is low, the invention adopts the heat storage balls with large particle size in the flue gas inlet area and the smoke outlet area, and adopts the heat storage balls with relatively small particle size in the middle section of the heat storage chamber, and the flue gas inlet pipeline and the flue gas outlet pipeline are arranged in the same direction with the wall of the heat storage chamber.
Compared with the prior art, the beneficial effects of the utility model are that: the invention adopts the design scheme that the particle size of the heat storage ball is gradually reduced along the flow direction of the flue gas in the middle section of the heat storage chamber, and the fracture probability of the heat storage ball caused by thermal stress can be greatly reduced, so that the service life of the heat storage ball is obviously prolonged, and the period of replacing the heat storage ball in the service of the heat storage chamber is prolonged.
According to the technical scheme, the flue gas inlet pipeline, the heat storage chamber wall and the flue gas outlet pipeline can be arranged in the same direction; and above-mentioned technical scheme need not inject and intake and exhaust vertically stagger, the staff's operation and use of being more convenient for.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic view of a regenerator in a fume extraction stage
FIG. 2 is a schematic view of a regenerator in the intake phase
FIG. 3 is a schematic view of a segmented combined regenerator in a fume extraction stage
FIG. 4 is a top view of each section of the modular regenerator
FIG. 5 is a side view of a modular thermal storage vault roof unit
FIG. 6 is a side view of a combined regenerator thermal storage unit
FIG. 7 is a side view of a modular thermal storage chamber end cap unit
In the figure: 1. a regenerator; 10. a flue gas inlet region; 11. the middle section of the regenerative chamber; 12. a smoke exhaust port area; 13. a pore; 14. a small pore; 2. a flue gas inlet duct; 20. cooling the air; 21. a channel; 22. an exhaust passage; 3. a thermal storage chamber wall; 31. a flue gas inlet section; 32. a regenerator first middle section; 33. a regenerator second middle section; 34. a regenerator third mid-section; 35. a flue gas outlet section; 36. a flange; 37. a metal mesh; 38. a top cover; 39. an end cap; 4. a flue gas outlet duct; 40. bolt holes; 41. a steel plate; 42. a refractory castable material; 43. lining with a heat-insulating fiber felt; 44. reinforcing ribs; 5. a heat storage ball; 50. a top cover unit; 51. a heat storage unit; 52. an end cap unit; 6. the central axis of the regenerator; 7. a flue gas inlet; 8. the direction of the flue gas flow; 9. and a flue gas outlet.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Examples
Referring to fig. 1-7, the present invention provides the following technical solutions: the utility model provides a high-efficient low coking low blockage regenerator of long-life, including the flue gas inlet pipeline 2 that the syntropy arranged, regenerator wall 3, flue gas outlet pipeline 4, flue gas inlet region 10, regenerator middle section 11 and exhaust port are regional 12, wherein the container that the regenerator wall formed contains a large amount of heat storage balls 5, flue gas inlet region 10 and exhaust port are regional 12 to adopt large particle size heat storage balls, 11 heat storage ball particle sizes reduce along flue gas flow direction 8 in regenerator middle section gradually, in this embodiment, be convenient for absorb the heat accumulation to the heat.
Specifically, the flue gas inlet pipeline 2 is connected with the combustion chamber and is arranged in parallel with the central axis 6 of the regenerator.
Specifically, the flue gas outlet pipeline 4 is communicated with the atmosphere and is arranged in parallel with the central axis 6 of the regenerator.
Specifically, the thermal storage chamber wall 3 is a vertically-arranged cylindrical barrel wall, and gas can pass through the thermal storage chamber wall conveniently in the embodiment.
Specifically, the heat storage balls 5 are filled in the inner cavity formed by the heat storage chamber wall 3, and are ceramic heat storage balls, and the particle size of the ceramic heat storage balls is 10mm-30mm, which is convenient for absorbing heat in the embodiment.
Specifically, the ceramic heat storage ball contains corundum, mullite, silicon carbide or clay.
Specifically, the large particle size is larger than the particle size of the regenerative balls corresponding to the regenerator middle stage 11.
Specifically, the flow direction of the flue gas is from the flue gas inlet 7 to the flue gas outlet 9, and the flue gas flows along the direction of the central axis 6 of the regenerator.
Specifically, the heat storage chamber wall 3 and the segments can be separated by a metal mesh 37 and connected by a flange 36, so that the structural stability of the equipment is improved in the embodiment.
Referring to fig. 1-7, the present invention provides the following technical solutions: the utility model provides a high-efficient low coking low blockage regenerator of long-life, including the flue gas inlet pipeline 2 that the syntropy arranged, regenerator wall 3, flue gas outlet pipeline 4, flue gas inlet region 10, regenerator middle section 11 and exhaust port are regional 12, wherein the container that the regenerator wall formed contains a large amount of heat storage balls 5, flue gas inlet region 10 and exhaust port are regional 12 to adopt large particle size heat storage balls, 11 heat storage ball particle sizes reduce along flue gas flow direction 8 in regenerator middle section gradually, in this embodiment, be convenient for absorb the heat accumulation to the heat.
Specifically, the flue gas inlet pipeline 2 is connected with the combustion chamber and is arranged in parallel with the central axis 6 of the regenerator.
Specifically, the flue gas outlet pipeline 4 is communicated with the atmosphere and is arranged in parallel with the central axis 6 of the regenerator.
Specifically, the thermal storage chamber wall 3 is a vertically-arranged cylindrical barrel wall, and gas can pass through the thermal storage chamber wall conveniently in the embodiment.
Specifically, the heat storage balls 5 are filled in the inner cavity formed by the heat storage chamber wall 3, and are ceramic heat storage balls, and the particle size of the ceramic heat storage balls is 10mm-30mm, which is convenient for absorbing heat in the embodiment.
Specifically, the ceramic heat storage ball contains corundum, mullite, silicon carbide or clay.
Specifically, the large particle size is larger than the particle size of the regenerative balls corresponding to the regenerator middle stage 11.
Specifically, the flow direction of the flue gas is from the flue gas inlet 7 to the flue gas outlet 9, and the flue gas flows along the direction of the central axis 6 of the regenerator.
Specifically, the sections of the heat storage chamber wall 3 can be separated by metal meshes 37 and connected by flanges 36, so that the structural stability of the equipment is improved in the embodiment.
During the implementation of the device, the top cover unit 50 is firstly constructed: the flue gas inlet pipeline 2 is connected to a disc-shaped top cover 38, a flange 36 is welded to the periphery of the top cover 38, and bolt holes 40 are formed in the flange 36.
The heat storage unit 51 is constructed: a metal net 37 containing reinforcing ribs 44 is laid at the bottom of the cylindrical heat storage chamber wall 3 to form a cavity with an opening at the upper part; the cavity can be filled with heat storage balls with equal grain diameter; a flange 36 is welded on the periphery of the wall of the heat storage chamber, and bolt holes 40 are formed in the flange 36.
Constructing the end cap unit 52: the flue gas outlet pipeline 4 is connected to a disc-shaped end cover 39, a flange 36 is welded around the end cover 39, and bolt holes 40 are formed in the flange 36.
Then a flue gas outlet section 35 is constructed: a heat storage unit 51 is arranged above the end cover unit 52 and connected through a flange 36; the connected heat storage units 51 were filled with ceramic heat storage balls having a particle size of 30 mm.
Build regenerator third middle section 34: a heat storage unit 51 is arranged above the flue gas outlet section 35 and connected through a flange 36; the connected heat storage units 51 were filled with ceramic heat storage balls having a particle size of 10 mm.
Build regenerator second middle section 33: a heat storage unit 51 is arranged above the middle flue gas section 34 and connected through a flange 36; the newly taken out heat storage unit 51 was filled with ceramic heat storage balls having a particle size of 15 mm.
Build regenerator first midsection 32: a heat storage unit 51 is arranged above the flue gas middle section 33 and connected through a flange 36; the newly taken out heat storage unit 51 was filled with ceramic heat storage balls having a particle size of 20 mm.
Finally, a flue gas inlet section 31 is constructed: a heat storage unit 51 is arranged above the flue gas middle section 32 and connected through a flange 36; filling ceramic heat storage balls with the grain diameter of 30mm into the newly taken out heat storage unit 51; the top cover unit 50 is then placed on the top and connected by the flange 36 to assemble the segmented combined regenerator 30.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides a high-efficient low coking low blockage regenerator of long-life, includes flue gas inlet pipeline (2), regenerator wall (3), flue gas outlet pipeline (4), flue gas inlet region (10), regenerator middle section (11) and the exhaust port region (12) of equidirectional arrangement, and wherein the container that the regenerator wall formed contains a large amount of heat accumulation balls (5), its characterized in that: the flue gas inlet area (10) and the smoke outlet area (12) adopt heat storage balls with large particle sizes, and the particle sizes of the heat storage balls in the middle section (11) of the heat storage chamber are gradually reduced along the flow direction (8) of flue gas.
2. The high efficiency, long life, low coking, low blockage regenerator of claim 1 further comprising: the flue gas inlet pipeline (2) is connected with the combustion chamber and is arranged in parallel with the central axis (6) of the regenerative chamber.
3. The high efficiency, long life, low coking, low blockage regenerator of claim 1 further comprising: the flue gas outlet pipeline (4) is communicated with the atmosphere and is arranged in parallel with the central axis (6) of the regenerator.
4. The high efficiency, long life, low coking, low blockage regenerator of claim 1 further comprising: the wall (3) of the heat storage chamber is a cylindrical wall which is vertically arranged.
5. The high efficiency, long life, low coking, low blockage regenerator of claim 1 further comprising: the heat storage balls (5) are filled in an inner cavity formed by the wall (3) of the heat storage chamber and are ceramic heat storage balls, and the particle size of the ceramic heat storage balls is 10-30 mm.
6. The high efficiency long life low coking low blockage regenerator of claim 5 further comprising: corundum, mullite, silicon carbide or clay is arranged in the ceramic heat storage ball (5).
7. The high efficiency, long life, low coking, low blockage regenerator of claim 1 further comprising: the large particle size is larger than the particle size of the heat storage ball corresponding to the middle section (11) of the heat storage chamber.
8. The high efficiency, long life, low coking, low blockage regenerator of claim 1 further comprising: the flow direction of the flue gas is from the flue gas inlet (7) to the flue gas outlet (9), and the flue gas flows along the direction of the central axis (6) of the regenerator.
9. The high efficiency, long life, low coking, low blockage regenerator of claim 1 further comprising: the sections of the heat storage chamber wall (3) can be separated by a metal net (37) and connected by a flange (36).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021200973.7U CN214095683U (en) | 2020-06-26 | 2020-06-26 | High-efficiency long-life low-coking low-blockage regenerator |
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| CN202021200973.7U CN214095683U (en) | 2020-06-26 | 2020-06-26 | High-efficiency long-life low-coking low-blockage regenerator |
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| CN202021200973.7U Active CN214095683U (en) | 2020-06-26 | 2020-06-26 | High-efficiency long-life low-coking low-blockage regenerator |
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