CN117644576A - Calcium carbide forming, cooling and waste heat recycling integrated system and working method - Google Patents
Calcium carbide forming, cooling and waste heat recycling integrated system and working method Download PDFInfo
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- CN117644576A CN117644576A CN202311373054.8A CN202311373054A CN117644576A CN 117644576 A CN117644576 A CN 117644576A CN 202311373054 A CN202311373054 A CN 202311373054A CN 117644576 A CN117644576 A CN 117644576A
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- calcium carbide
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- cooling
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- 239000005997 Calcium carbide Substances 0.000 title claims abstract description 164
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 title claims abstract description 164
- 239000002918 waste heat Substances 0.000 title claims abstract description 95
- 238000001816 cooling Methods 0.000 title claims abstract description 79
- 238000004064 recycling Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000007789 gas Substances 0.000 claims description 44
- 238000011084 recovery Methods 0.000 claims description 44
- 239000007788 liquid Substances 0.000 claims description 34
- 230000005855 radiation Effects 0.000 claims description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 238000003860 storage Methods 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 9
- 239000000428 dust Substances 0.000 claims description 9
- 238000000465 moulding Methods 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 239000012071 phase Substances 0.000 description 32
- 238000007599 discharging Methods 0.000 description 7
- 239000007791 liquid phase Substances 0.000 description 7
- 238000012546 transfer Methods 0.000 description 4
- 238000007493 shaping process Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 235000011837 pasties Nutrition 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B15/00—General arrangement or layout of plant ; Industrial outlines or plant installations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/14—Producing shaped prefabricated articles from the material by simple casting, the material being neither forcibly fed nor positively compacted
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/54—Producing shaped prefabricated articles from the material specially adapted for producing articles from molten material, e.g. slag refractory ceramic materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/24—Apparatus or processes for treating or working the shaped or preshaped articles for curing, setting or hardening
- B28B11/243—Setting, e.g. drying, dehydrating or firing ceramic articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
- B28B13/04—Discharging the shaped articles
- B28B13/06—Removing the shaped articles from moulds
- B28B13/067—Removing the shaped articles from moulds by applying blows or vibrations followed by, or during, the removal of a mould part
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B17/00—Details of, or accessories for, apparatus for shaping the material; Auxiliary measures taken in connection with such shaping
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D31/00—Other cooling or freezing apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D21/0001—Recuperative heat exchangers
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Landscapes
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Combustion & Propulsion (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The invention discloses an integrated system for calcium carbide forming, cooling and waste heat recycling, which comprises a forming cooling unit, a waste heat recycling unit, a waste heat utilization unit and a circulation unit, wherein the circulation unit is communicated with the waste heat recycling unit through the forming cooling unit, and the waste heat utilization unit is communicated with the circulation unit. The calcium carbide forming, cooling and waste heat recycling integrated system and the working method adopting the structure are integrated with the cooling unit, the waste heat recycling unit, the waste heat utilization unit and the circulating unit to obtain the integrated system, so that small-sized and solid-state calcium carbide blocks can be directly obtained by one-time production, the process flow can be greatly reduced, the production efficiency is improved, and the occupied area is reduced.
Description
Technical Field
The invention relates to the technical field of calcium carbide production waste heat utilization, in particular to a calcium carbide forming, cooling and waste heat recycling integrated system and a working method.
Background
Liquid slag is commonly used in metallurgical building material industry, including coking, sintering, calcining and other technological processes, and can generate over 45 hundred million tons of high-temperature solid bulk materials each year, and the liquid slag can release heat to about 1 hundred million tons of standard coal when cooled to an application scene state. Particularly in the calcium carbide production process, when the calcium carbide leaves the calcium carbide furnace, the calcium carbide is in a liquid pasty state at about 2200 ℃. In most conventional production processes, the calcium carbide is naturally cooled to 80 ℃ in a calcium carbide pot and then crushed into usable small blocks. During the cooling period of the calcium carbide block, a large amount of heat is released, which accounts for about 20% of the energy consumption in the production process, so that great energy loss is caused; and the cooling period is as long as 36 hours, and a larger space is needed for natural cooling. Therefore, the method has the dual significance of saving energy and improving productivity by carrying out accelerated cooling and waste heat recycling on the calcium carbide.
In recent years, there have been a great deal of researches and achievements in the related fields for calcium carbide cooling and waste heat recovery, and in CN201510556376.5, hot air performs convection and radiation heat exchange on the surface of the heat exchange tube wall, so as to achieve the purpose of forced cooling of calcium carbide. The device can realize forced convection heat exchange of the closed space, but still can not improve the cooling rate of the center part of the calcium carbide.
The difficulties in the calcium carbide cooling and waste heat utilization process include the following aspects: the existing calcium carbide pot body is naturally ventilated and cooled in a large space, the heat exchange coefficient of air serving as a heat transfer medium is low, and the cooling rate of calcium carbide is low; the calcium carbide pot is naturally ventilated and cooled in a large space, the temperature rise of air is low, and heat carried in the calcium carbide pot cannot be collected; the central position of the calcium carbide block is limited by the heat capacity and the heat conductivity coefficient of the calcium carbide, so that the heat transfer rate to the outside is low, and the cooling is extremely difficult; the liquid calcium carbide is contained in the calcium carbide pot for cooling, the heat exchange surface area is extremely small, and the natural convection heat exchange efficiency is extremely low.
Disclosure of Invention
The invention aims to provide an integrated system for calcium carbide forming, cooling and waste heat recycling and a working method thereof, wherein an integrated system is obtained by integrating a cooling unit, a waste heat recycling unit, a waste heat utilization unit and a circulating unit, and small-sized and solid-state calcium carbide blocks can be directly obtained by one-time production, so that the process flow can be greatly reduced, the production efficiency is improved, and the occupied area is reduced.
In order to achieve the above purpose, the invention provides an integrated system for calcium carbide forming, cooling and waste heat recycling, which comprises a forming cooling unit, a waste heat recycling unit, a waste heat utilization unit and a circulation unit, wherein the circulation unit is communicated with the waste heat recycling unit through the forming cooling unit, and the waste heat utilization unit is communicated with the circulation unit;
the forming cooling unit comprises a storage bin, a flow equalizing module, a forming die, a die conveying mechanism, a cooling bellows, a radiation heat exchange wall, a gas distributor and a vibrator, wherein the storage bin is communicated with the forming box, the forming die is arranged below the flow equalizing module and is positioned on a conveying chain of the die conveying mechanism, the cooling bellows is arranged between the upper side and the lower side of the conveying chain, the radiation heat exchange wall is arranged on the outer side of the forming die in a surrounding mode, one side, away from the flow equalizing module, of the forming cooling unit is provided with a forming discharge hole, and the vibrator is arranged at the forming discharge hole.
Preferably, the waste heat recovery unit comprises a waste heat recovery box, a calcium carbide conveying mechanism and a calcium carbide feeding conveyor belt, the forming discharge port is connected with the calcium carbide conveying belt of the calcium carbide conveying mechanism through the calcium carbide feeding conveyor belt, the waste heat recovery box is hinged with a calcium carbide feeding door at the calcium carbide feeding conveyor belt, a gas phase inlet of the waste heat recovery box is communicated with an air outlet of the cooling air box, and a gas phase outlet of the waste heat recovery box is communicated with the gas distributor.
Preferably, the circulation unit comprises a first circulation fan, a second circulation fan, a first-stage heat exchanger, a second-stage heat exchanger, a drying module, a circulation water pump and a dust removal module, wherein the first circulation fan is communicated with the cooling bellows through the drying module, a circulation air outlet of the radiation heat exchange wall is communicated with a circulation air inlet of the radiation heat exchange wall through the second-stage heat exchanger and the second circulation fan in sequence, and the first-stage heat exchanger is communicated with a heat exchange air outlet of the forming box through the dust removal module.
Preferably, the waste heat utilization device of the waste heat utilization unit is sequentially in circulation communication with the circulating water pump, the primary heat exchanger and the secondary heat exchanger.
Preferably, the waste heat recovery box is provided with a calcium carbide discharge port at a bottom plate of the calcium carbide conveyer belt, which is far away from the lower part of one end of the calcium carbide feeding door.
Preferably, one end of the calcium carbide feeding conveyor belt is positioned below the die conveying mechanism, the other end of the calcium carbide feeding conveyor belt is positioned above the calcium carbide conveying belt, and a plurality of forming dies are uniformly arranged on the die conveying belt.
Preferably, the gas distributor is located below the forming box, the heat exchange air outlet is located at the center of the top of the forming box, and a relative sealing cavity is formed inside the forming box.
Preferably, the size of the forming die can be designed according to the final required size of the original calcium carbide crushing process, so that the original crushing process is replaced, and the productivity and the efficiency are further improved.
Preferably, the gas-phase circulating working medium is diatomic gas with three atoms, multiple atoms and asymmetric molecular structure, and water vapor is avoided as the gas-phase circulating working medium.
The working method of the calcium carbide forming, cooling and waste heat recycling integrated system comprises the following steps:
s1, calcium carbide liquid in a storage bin is uniformly distributed in a forming die through a flow equalizing module, and after the forming die is filled, a conveying chain starts to inject the calcium carbide liquid into the next forming die;
s2, absorbing radiant heat of calcium carbide liquid by the radiation heat exchange wall, exchanging heat by the circulation unit, discharging gas heat exchange working substance by the gas distributor, performing contact convection heat exchange on the calcium carbide liquid, and solidifying the calcium carbide liquid in the forming die after performing contact heat exchange by the radiation heat exchange wall and the gas distributor to obtain a calcium carbide block;
s3, the vibrator knocks the forming die to separate the calcium carbide blocks from the forming die, the conveying chain drops the calcium carbide block discharge onto a calcium carbide feeding conveyor belt, and then the calcium carbide block discharge is conveyed onto the calcium carbide conveying belt to be discharged from a calcium carbide discharge port, and the gas phase heat exchange working medium circulated in the waste heat recovery box exchanges heat with the calcium carbide blocks;
s4, the gas phase heat exchange working medium in the waste heat recovery box enters the forming box through the gas phase outlet to the gas distributor, and then enters the circulating unit through the heat exchange air outlet.
Therefore, the calcium carbide forming, cooling and waste heat recycling integrated system adopting the structure and the working method have the beneficial effects that:
1. according to the integrated cooling system, the waste heat recovery unit, the waste heat utilization unit and the circulating unit are integrated to obtain the integrated system, the units are of modularized design, can be flexibly arranged according to the field space, can directly obtain small-sized and solid-state carbide blocks through one-time production, can greatly reduce the process flow, improve the production efficiency and reduce the occupied area;
2. the temperature of the liquid-phase calcium carbide liquid is extremely high, the calcium carbide liquid is scattered in each forming die, the specific heat exchange surface area is increased, the contact area between the calcium carbide liquid and a cooling medium can be effectively increased by using an injection molding process, and the stable and continuous operation of the integrated system in a high-temperature state is ensured;
3. the radiation heat exchange wall carries out high-temperature heat recovery on the calcium carbide liquid, the gas-phase circulation working medium in the radiation heat exchange wall has higher temperature rise and better heat quality, the gas-phase circulation working medium enters the secondary heat exchanger to heat the liquid-phase circulation working medium, and the gas-phase heat exchange working medium and the calcium carbide liquid in the forming die can obtain a large amount of heat and simultaneously cool the internal structure of the integrated system;
4. the integrated system provided by the invention can control the temperature of the calcium carbide leaving the system according to the production process, the minimum temperature can be reduced to 300 ℃, the time is about 2 hours, about 85% of waste heat of the calcium carbide is effectively recovered, and the cooling time is reduced by about 90%;
5. according to the drying module, the dried gas-phase heat exchange working medium is used for carrying out contact heat exchange with the calcium carbide, so that the loss caused by contact of water vapor and the calcium carbide in the process is greatly reduced, and the quality and the productivity of the calcium carbide are effectively ensured.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Drawings
FIG. 1 is a flow chart of an integrated calcium carbide forming, cooling and waste heat recycling system;
FIG. 2 is a flow chart of a forming and cooling unit of the calcium carbide forming, cooling and waste heat recycling integrated system;
FIG. 3 is a flow chart of a waste heat recovery unit of the calcium carbide forming, cooling and waste heat recovery integrated system.
Reference numerals
1. A molding cooling unit; 11. a forming box; 12. a storage bin; 13. a current equalizing module; 14. a forming die; 15. a radiant heat exchange wall; 16. a gas distributor; 17. a vibrator; 18. cooling the bellows; 19. a die conveying mechanism; 2. a waste heat recovery unit; 21. a waste heat recovery box; 22. a calcium carbide conveying mechanism; 23. calcium carbide feeding conveyor belt; 24. a calcium carbide feeding door; 25. a gas phase inlet; 26. a gas phase outlet; 27. a calcium carbide discharge port; 3. a waste heat utilization unit; 4. a circulation unit; 41. a first circulating fan; 42. a second circulating fan; 43. a primary heat exchanger; 44. a secondary heat exchanger; 45. a drying module; 46. a circulating water pump; 47. and a dust removal module.
Detailed Description
The technical scheme of the invention is further described below through the attached drawings and the embodiments.
Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.
Example 1
FIG. 1 is a flow chart of an integrated calcium carbide forming, cooling and waste heat recycling system; FIG. 2 is a flow chart of a forming and cooling unit of the calcium carbide forming, cooling and waste heat recycling integrated system;
fig. 3 is a flow chart of a waste heat recovery unit of the calcium carbide forming, cooling and waste heat recovery integrated system, as shown in fig. 1-3. The device comprises a molding cooling unit 1, a waste heat recovery unit 2, a waste heat utilization unit 3 and a circulation unit 4, wherein the circulation unit 4 is communicated with the waste heat recovery unit 2 through the molding cooling unit 1, and the waste heat utilization unit 3 is communicated with the circulation unit 4. The shaping cooling unit 1 is used for turning into the carbide liquid and cooling solidification to obtain the carbide piece in shaping mould 14, and waste heat recovery unit 2 is to the further degree of depth heat transfer and ejection of compact of carbide piece, and waste heat utilization unit 3 utilizes the heat that shaping cooling unit 1 and waste heat recovery unit 2 retrieved to heat liquid phase circulation working medium temperature and realizes heat utilization, and circulation unit 4 carries out cyclic treatment to each working medium.
The forming cooling unit 1 comprises a storage bin 12, a flow equalizing module 13, a forming die 14, a die conveying mechanism 19, a cooling bellows 18, a radiation heat exchange wall 15, a gas distributor 16 and a vibrator 17. The storage bin 12 is communicated with a forming die 14 arranged below a flow equalizing module 13 of the forming box 11, the forming die 14 is positioned on a conveying chain of a die conveying mechanism 19, and a cooling bellows 18 is arranged between the upper side and the lower side of the conveying chain. The outside of the forming die 14 is surrounded by a radiation heat exchange wall 15, one side of the forming cooling unit 1 far away from the flow equalizing module 13 is provided with a forming discharge port, and the forming discharge port is provided with a vibrator 17.
The forming die 14 is connected with and evenly distributed on the conveying chain, a main conveying sprocket of the conveying chain is positioned below the vibrator 17, a secondary conveying sprocket is positioned below the flow equalizing module 13, and the main conveying sprocket and the secondary conveying sprocket are both in meshed connection with the conveying chain. The cooling bellows 18 is located between the upper side and the lower side of the conveying chain, so that heat exchange is realized on the structures such as the master-slave conveying chain wheel, the conveying chain, the forming die 14 and the like in the forming box 11, and the influence of thermal erosion is avoided. The vibrator 17 separates the calcium carbide blocks from the inner wall of the forming die 14, and the conveying chain continues to drive the forming die 14 to move to incline the forming die 14, wherein the calcium carbide blocks fall onto the calcium carbide feeding conveyor belt 23 and enter the waste heat recovery box 21. The width of the calcium carbide feeding conveyor belt 23 is smaller than that of the forming discharge hole, so that the calcium carbide feeding conveyor belt 23 can work normally.
Three heat exchange modes exist in the forming cooling unit 1, so that the cascade recovery of the calcium carbide waste heat is realized. First, the radiation heat exchange wall 15 performs radiation heat exchange for the carbide liquid. At this time, the carbide liquid is in a high temperature state, and because of the abundant radiant heat existing due to the higher temperature of the carbide liquid, the gas phase flowing direction in the radiation heat exchange wall 15 arranged in a surrounding manner is opposite to the carbide liquid conveying direction, so that a better heat exchange effect is realized. Secondly, the gas phase heat exchange working medium output by the gas distributor 16 carries out contact convection heat exchange on calcium carbide liquid in the forming box 11. At this time, the calcium carbide is in a molding state, the specific surface area is increased, and the gas-phase heat exchange working medium and the calcium carbide liquid are in contact heat exchange, so that the calcium carbide liquid is effectively cooled. Finally, the cooling bellows 18 cools the structure in the forming box 11, thereby realizing indirect convection heat exchange.
The waste heat recovery unit 2 comprises a waste heat recovery box 21, a calcium carbide conveying mechanism 22 and a calcium carbide feeding conveyor belt 23, and a forming discharge port is connected with the calcium carbide conveying belt of the calcium carbide conveying mechanism 22 through the calcium carbide feeding conveyor belt 23. The waste heat recovery box 21 is hinged with a calcium carbide feeding door 24 at a calcium carbide feeding conveyor belt 23, a gas phase inlet 25 of the waste heat recovery box 21 is communicated with an air outlet of the cooling air box 18, and a gas phase outlet 26 of the waste heat recovery box 21 is communicated with the gas distributor 16.
After the calcium carbide block moves to the calcium carbide feeding door 24 on the calcium carbide feeding conveyor belt 23, the calcium carbide feeding door 24 is jacked up to continue to move and drop to one end of the calcium carbide conveyor belt, and the calcium carbide block moves to the other end of the calcium carbide conveyor belt and then drops to the calcium carbide discharging hole 27 for discharging. The arrangement of the calcium carbide feeding door 24 avoids the overflow of the gas-phase heat exchange working medium in the waste heat recovery box 21.
The circulation unit 4 includes a first circulation fan 41, a second circulation fan 42, a primary heat exchanger 43, a secondary heat exchanger 44, a drying module 45, a circulation water pump 46, and a dust removal module 47. The first circulating fan 41 is communicated with the cooling air box 18 through the drying module 45, the circulating air outlet of the radiation heat exchange wall 15 is communicated with the circulating air inlet of the radiation heat exchange wall 15 through the second-stage heat exchanger 44 and the second circulating fan 42 in sequence, and the first-stage heat exchanger 43 is communicated with the heat exchange air outlet of the forming box 11 through the dust removal module 47.
After entering the first circulating fan 41 from the outside, the gas-phase heat exchange working medium is firstly dried and conveyed to the cooling bellows 18 through the drying module 45, and enters from the gas inlet of the cooling bellows 18. After the gas-phase heat exchange working medium cools the internal structure of the forming box 11, the gas-phase heat exchange working medium leaves the cooling air box 18 from the air outlet of the cooling air box 18 to the gas-phase inlet 25 of the waste heat recovery box 21. The calcium carbide blocks in the waste heat recovery box 21 are subjected to heat exchange, enter the forming box 11 through the gas phase outlet 26 into the gas distributor 16, are subjected to contact heat exchange with calcium carbide liquid in the forming die 14, and leave the forming box 11 through the heat exchange air outlet to the dust removal module 47. The gas-phase heat exchange working medium is selectively separated from the system or returned to the first circulating fan 41 for circulation after being heated in the primary heat exchanger 43 through the dust removal module 47.
The gas-phase circulating working medium is pressurized and conveyed into the radiation heat exchange wall 15 by the second circulating fan 42, and enters the second heat exchanger 44 after absorbing the radiation heat of the calcium carbide liquid, and enters the second circulating fan 42 for continuous circulation after further heating the liquid-phase circulating working medium. The gas-phase circulating working medium has stronger radiation and absorption capacity, can effectively ensure the radiation heat exchange effect, and avoids water vapor as the gas-phase circulating working medium so as to ensure the safety of system operation.
The waste heat utilization device of the waste heat utilization unit 3 is in circulation communication with the circulating water pump 46, the primary heat exchanger 43 and the secondary heat exchanger 44 in sequence. After being pressurized by the circulating water pump 46, the liquid-phase circulating working medium is heated by the primary heat exchanger 43 and the secondary heat exchanger 44 in sequence, and the liquid-phase circulating working medium can be selected to directly output heat utilization, generate superheated steam in the waste heat utilization unit 3 or enter a heat utilization mode such as generating set power generation and the like according to the temperature value of the liquid-phase circulating working medium.
The waste heat recovery box 21 is provided with a calcium carbide discharge port 27 at the bottom plate of the calcium carbide conveyer belt, which is far away from the lower part of one end of the calcium carbide feeding door 24, and the transfer trolley is stopped below the calcium carbide discharge port 27, so that the unified collection and transportation of calcium carbide blocks can be realized.
One end of the calcium carbide feeding conveyor belt 23 is positioned below the die conveying mechanism 19, the other end of the calcium carbide feeding conveyor belt is positioned above the calcium carbide conveying belt, and a plurality of forming dies 14 are uniformly arranged on the die conveying belt.
The gas distributor 16 is located below the forming box 11, and the heat exchange air outlet is located at the center of the top of the forming box 11. Inside the forming box 11 is a relatively sealed cavity which is used as a contact heat exchange flow channel for flowing and exchanging heat of gas-phase heat exchange working media.
Example 2
The working method of the calcium carbide forming, cooling and waste heat recycling integrated system comprises the following steps:
s1, calcium carbide liquid in a storage bin 12 is uniformly distributed in a forming die 14 through a flow equalizing module 13, and after the forming die 14 is filled, a conveying chain is started to inject calcium carbide liquid into the next forming die 14.
S2, the radiation heat exchange wall 15 absorbs the radiation heat of the calcium carbide liquid and exchanges heat through the circulation unit 4, the gas distributor 16 discharges the gas heat exchange medium to perform contact convection heat exchange on the calcium carbide liquid, and the calcium carbide liquid in the forming die 14 is solidified to obtain a calcium carbide block after contact heat exchange is performed through the radiation heat exchange wall 15 and the gas distributor 16.
S3, the vibrator 17 strikes the forming die 14 to separate the calcium carbide blocks from the forming die 14, the conveying chain drops calcium carbide block discharging onto the calcium carbide feeding conveyor belt 23, and then the calcium carbide block discharging is conveyed onto the calcium carbide conveying belt to the calcium carbide discharging port 27 for discharging, and the circulating gas-phase heat exchange working medium in the waste heat recovery box 21 exchanges heat with the calcium carbide blocks.
S4, the gas phase heat exchange working medium in the waste heat recovery box 21 enters the forming box 11 through the gas phase outlet 26 to the gas distributor 16, and then enters the circulation unit 4 through the heat exchange air outlet.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention and not for limiting it, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that: the technical scheme of the invention can be modified or replaced by the same, and the modified technical scheme cannot deviate from the spirit and scope of the technical scheme of the invention.
Claims (8)
1. Calcium carbide forming, cooling and waste heat recycling integrated system is characterized in that: the device comprises a molding cooling unit, a waste heat recovery unit, a waste heat utilization unit and a circulation unit, wherein the circulation unit is communicated with the waste heat recovery unit through the molding cooling unit, and the waste heat utilization unit is communicated with the circulation unit;
the forming cooling unit comprises a storage bin, a flow equalizing module, a forming die, a die conveying mechanism, a cooling bellows, a radiation heat exchange wall, a gas distributor and a vibrator, wherein the storage bin is communicated with the forming box, the forming die is arranged below the flow equalizing module and is positioned on a conveying chain of the die conveying mechanism, the cooling bellows is arranged between the upper side and the lower side of the conveying chain, the radiation heat exchange wall is arranged on the outer side of the forming die in a surrounding mode, one side, away from the flow equalizing module, of the forming cooling unit is provided with a forming discharge hole, and the vibrator is arranged at the forming discharge hole.
2. The calcium carbide forming, cooling and waste heat recycling integrated system according to claim 1, wherein: the waste heat recovery unit comprises a waste heat recovery box, a calcium carbide conveying mechanism and a calcium carbide feeding conveyor belt, wherein the forming discharge port is connected with the calcium carbide conveying belt of the calcium carbide conveying mechanism through the calcium carbide feeding conveyor belt, the waste heat recovery box is hinged with a calcium carbide feeding door at the calcium carbide feeding conveyor belt, a gas phase inlet of the waste heat recovery box is communicated with an air outlet of the cooling bellows, and a gas phase outlet of the waste heat recovery box is communicated with the gas distributor.
3. The calcium carbide forming, cooling and waste heat recycling integrated system according to claim 1, wherein: the circulating unit comprises a first circulating fan, a second circulating fan, a primary heat exchanger, a secondary heat exchanger, a drying module, a circulating water pump and a dust removal module, wherein the first circulating fan is communicated with the cooling bellows through the drying module, a circulating air outlet of the radiation heat exchange wall is communicated with a circulating air inlet of the radiation heat exchange wall through the secondary heat exchanger and the second circulating fan in sequence, and the primary heat exchanger is communicated with a heat exchange air outlet of the forming box through the dust removal module.
4. The calcium carbide forming, cooling and waste heat recycling integrated system according to claim 3, wherein: and the waste heat utilization equipment of the waste heat utilization unit is sequentially communicated with the circulating water pump, the primary heat exchanger and the secondary heat exchanger in a circulating way.
5. The calcium carbide forming, cooling and waste heat recycling integrated system according to claim 2, wherein: and a calcium carbide discharge port is arranged at the bottom plate of the waste heat recovery box, which is far away from the lower part of one end of the calcium carbide feeding door, of the calcium carbide conveying belt.
6. The calcium carbide forming, cooling and waste heat recycling integrated system according to claim 2, wherein: and one end of the calcium carbide feeding conveyor belt is positioned below the die conveying mechanism, the other end of the calcium carbide feeding conveyor belt is positioned above the calcium carbide conveying belt, and a plurality of forming dies are uniformly arranged on the die conveying belt.
7. The calcium carbide forming, cooling and waste heat recycling integrated system according to claim 1, wherein: the gas distributor is positioned below the forming box, the heat exchange air outlet is positioned at the center of the top of the forming box, and a relative sealing cavity is arranged inside the forming box.
8. The method for operating the calcium carbide forming, cooling and waste heat recycling integrated system according to any one of claims 1 to 7, wherein the method comprises the following steps:
s1, calcium carbide liquid in a storage bin is uniformly distributed in a forming die through a flow equalizing module, and after the forming die is filled, a conveying chain starts to inject the calcium carbide liquid into the next forming die;
s2, absorbing radiant heat of calcium carbide liquid by the radiation heat exchange wall, then carrying out heat exchange by the circulation unit, carrying out contact convection heat exchange on the calcium carbide liquid by the gas heat exchange working medium, and solidifying the calcium carbide liquid in the forming die after carrying out contact heat exchange by the radiation heat exchange wall and the gas distributor to obtain a calcium carbide block;
s3, the vibrator knocks the forming die to separate the calcium carbide blocks from the forming die, the conveying chain drops the calcium carbide block discharge onto a calcium carbide feeding conveyor belt, and then the calcium carbide block discharge is conveyed onto the calcium carbide conveying belt to be discharged from a calcium carbide discharge port, and the gas phase heat exchange working medium circulated in the waste heat recovery box exchanges heat with the calcium carbide blocks;
s4, the gas phase heat exchange working medium in the waste heat recovery box enters the forming box through the gas phase outlet to the gas distributor, and then enters the circulating unit through the heat exchange air outlet.
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| CN117621241A (en) * | 2023-10-20 | 2024-03-01 | 山东大学 | Novel carbide shaping device |
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| US20040007307A1 (en) * | 2000-11-08 | 2004-01-15 | Charles Falinower | Method for hydrating sheets of plasterboard and device for implementing it |
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