CN116288534A - Aluminum electrolysis cell side wall waste heat recovery device - Google Patents
Aluminum electrolysis cell side wall waste heat recovery device Download PDFInfo
- Publication number
- CN116288534A CN116288534A CN202310291766.9A CN202310291766A CN116288534A CN 116288534 A CN116288534 A CN 116288534A CN 202310291766 A CN202310291766 A CN 202310291766A CN 116288534 A CN116288534 A CN 116288534A
- Authority
- CN
- China
- Prior art keywords
- gas collecting
- side wall
- waste heat
- recovery device
- heat recovery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 37
- 239000002918 waste heat Substances 0.000 title claims abstract description 31
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 238000005868 electrolysis reaction Methods 0.000 title claims abstract description 27
- 238000011084 recovery Methods 0.000 title claims abstract description 20
- 239000007789 gas Substances 0.000 claims abstract description 54
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical compound [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000007789 sealing Methods 0.000 claims description 4
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 3
- 239000011464 hollow brick Substances 0.000 claims description 3
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 3
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 3
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 claims description 2
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000004134 energy conservation Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C3/00—Electrolytic production, recovery or refining of metals by electrolysis of melts
- C25C3/06—Electrolytic production, recovery or refining of metals by electrolysis of melts of aluminium
- C25C3/22—Collecting emitted gases
-
- 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
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Electrolytic Production Of Metals (AREA)
Abstract
The invention provides an aluminum electrolysis cell side wall waste heat recovery device which comprises a heat exchange chamber, an air inlet pipe, exhaust pipes, a gas collecting pipe a, a gas collecting pipe b, a gas collecting pipe c and a high-temperature induced draft fan, wherein the periphery of the heat exchange chamber is formed by an inner lining of the side wall of an electrolysis cell, the two sides of the top of the heat exchange chamber are respectively provided with the communicated air inlet pipe and the exhaust pipes, a butterfly valve is respectively arranged between each exhaust pipe and the gas collecting pipe a, the rear end of each exhaust pipe is sequentially connected with the gas collecting pipe a, the gas collecting pipe b and the gas collecting pipe c, and the rear end of the gas collecting pipe c is connected with the high-temperature induced draft fan. The invention compactly and reasonably arranges the aluminum cell side wall waste heat recovery device under the condition of not influencing the established replacement operation of the aluminum cell, effectively collects the side wall waste heat of the aluminum cell and utilizes the collected high-temperature gas to carry out waste heat utilization, thereby solving the problems of high energy consumption and low energy utilization rate of the existing aluminum cell industry.
Description
Technical Field
The invention relates to an aluminum electrolysis cell side wall waste heat recovery device, and belongs to the technical field of energy conservation and carbon reduction of aluminum electrolysis cells.
Background
At present, the smelting method for producing metallic aluminum worldwide always uses cryolite-alumina fused salt electrolysis method, and main production equipment of the method mainly comprises an aluminum electrolysis cell with higher energy consumption. Currently, the ton aluminum direct current electric energy consumption of the domestic and foreign aluminum electrolytic tanks is generally between 12500 and 14000 kWh/t-Al.
TABLE 1 energy utilization statistics of several prebaked aluminum cells
As shown by analysis in Table 1, the energy utilization rate of the aluminum electrolysis cell is generally between 45% and 48%, the heat dissipation capacity of the side wall of the aluminum electrolysis cell reaches 20% to 43% of heat income, the heat dissipation surface temperature of the side wall can reach 200-400 ℃ (the temperature can reach more than 600 ℃ when the roasting is started), and therefore, the cost of aluminum electrolysis production is increased, and a large amount of heat is wasted. Under the environment that the energy shortage and electricity price are high and the national policy emphasizes energy conservation and emission reduction, the high energy consumption has formed restriction on the development and survival of the electrolytic aluminum industry.
Disclosure of Invention
In order to solve the technical problems, the invention provides the aluminum electrolysis cell side wall waste heat recovery device which effectively collects the aluminum electrolysis cell side wall waste heat and utilizes the waste heat through the waste heat utilization system, thereby solving the problems of high energy consumption and low energy utilization rate in the existing aluminum electrolysis industry.
The invention provides an aluminum electrolysis cell side wall waste heat recovery device which is composed of the following components: the utility model provides an aluminium cell lateral wall waste heat recovery device, includes heat exchange chamber, air-supply line, exhaust column, gas-collecting tube a, gas-collecting tube b, gas-collecting tube c and high temperature draught fan, the heat exchange chamber comprises electrolysis trough lateral wall inside lining, and heat exchange chamber top both sides distribute have air-supply line and the exhaust column of intercommunication, are provided with the butterfly valve respectively between every exhaust column and the gas-collecting tube a, gas-collecting tube b and gas-collecting tube c are connected gradually to the exhaust column rear end, and the high temperature draught fan is connected to gas-collecting tube c rear end.
Further, the side wall lining of the electrolytic tank is an integral wall built by combining silicon nitride with silicon carbide hollow bricks.
Further, the air inlet pipe and the exhaust pipe are arranged between the top of the heat exchange chamber and the groove edge plate, and a gap in the middle is tamped and sealed by sealing paste.
Further, the diameter of the gas collecting tube a is larger than that of the exhaust tube, the diameter of the gas collecting tube b is larger than that of the gas collecting tube a, and the diameter of the gas collecting tube c is larger than that of the gas collecting tube b.
Further, the gas collecting tube b is arranged on the outer side of the cradle frame of the electrolytic cell, and the cradle frame of the electrolytic cell is uniformly distributed at equal intervals along the long axis direction of the heat exchange chamber.
Further, a butterfly valve is arranged between the gas collecting tube a and each exhaust tube.
Further, the rear end of the high-temperature induced draft fan is connected with a waste heat utilization system.
By adopting the technical scheme, the invention has the advantages that: the invention compactly and reasonably arranges the aluminum cell side wall waste heat recovery device under the condition of not influencing the established replacement operation of the aluminum cell, effectively collects the side wall waste heat of the aluminum cell and utilizes the collected high-temperature gas to carry out waste heat utilization, thereby solving the problems of high energy consumption and low energy utilization rate of the existing aluminum cell industry.
Drawings
Figure 1 is a top view of the aluminum electrolysis cell side wall waste heat recovery device of the present invention.
FIG. 2 is an enlarged view of a portion of the aluminum electrolysis cell sidewall heat recovery device of the present invention.
Figure 3 is a front view of the aluminum electrolysis cell side wall waste heat recovery device of the present invention.
Reference numerals illustrate: 1-heat exchange chamber, 102-side lining of the electrolytic cell, 103-air inlet pipe, 104-exhaust pipe, 105-gas collecting pipe a, 106-gas collecting pipe b, 107-gas collecting pipe c, 108-high temperature induced draft fan, 109-waste heat utilization system, 110-butterfly valve, 111-sealing paste, 112-cell edge plate and 113-cell cradle frame.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and examples.
Examples:
referring to fig. 1 and 2, the aluminum electrolysis cell side wall waste heat recovery device according to the embodiment comprises a heat exchange chamber 1, an air inlet pipe 103, an exhaust pipe 104, a gas collecting pipe a105, a gas collecting pipe b106, a gas collecting pipe c107 and a high-temperature induced draft fan 108, wherein the periphery of the heat exchange chamber 1 is composed of an electrolysis cell side wall liner 102, the two sides of the top of the heat exchange chamber 1 are respectively provided with the communicated air inlet pipe 103 and the exhaust pipe 104, a butterfly valve 110 is respectively arranged between each exhaust pipe 104 and the gas collecting pipe a105, the rear end of each exhaust pipe 104 is sequentially connected with the gas collecting pipe a105, the gas collecting pipe b106 and the gas collecting pipe c107, and the rear end of the gas collecting pipe c107 is connected with the high-temperature induced draft fan 108. The side wall lining 102 of the electrolytic cell is an integral wall built by combining silicon nitride with silicon carbide hollow bricks. The air inlet pipe 103 and the exhaust pipe 104 are arranged between the top of the heat exchange chamber 1 and the groove edge plate 112, and the middle gap is tamped and sealed by sealing paste 111. The diameter of the gas collecting tube a105 is larger than that of the exhaust tube 104, the diameter of the gas collecting tube b106 is larger than that of the gas collecting tube a105, and the diameter of the gas collecting tube c107 is larger than that of the gas collecting tube b106, so that gas can be conveniently collected, and the heat exchange efficiency is improved. The gas collecting tube b106 is arranged on the outer side of the cradle frame 113 of the electrolytic cell, and the cradle frame 113 of the electrolytic cell is uniformly and equidistantly distributed along the long axis direction of the heat exchange chamber 1. A butterfly valve 110 is arranged between the gas collecting tube a105 and each exhaust tube 104. The rear end of the high-temperature induced draft fan 108 is connected with a waste heat utilization system 109.
The working principle of the invention is as follows:
firstly, a high-temperature induced draft fan is started, cold air enters a heat exchange chamber from an air inlet pipe 103 under the condition of negative air pressure, the cold air is in contact with a side wall lining 102 of an electrolytic cell and exchanges heat emitted by the electrolytic cell, then the temperature is increased to become heat-carrying air, the hot air sequentially enters a gas collecting pipe a105, a gas collecting pipe b106 and a gas collecting pipe c107 through an exhaust pipe 104, and finally the hot air enters a waste heat utilization system 109 through the high-temperature induced draft fan.
Claims (7)
1. The utility model provides an aluminium cell lateral wall waste heat recovery device, includes heat exchange chamber (1), air-supply line (103), exhaust column (104), gas collecting tube a (105), gas collecting tube b (106), gas collecting tube c (107) and high temperature draught fan (108), its characterized in that: the heat exchange chamber (1) is formed by an inner lining (102) of the side wall of the electrolytic tank, two communicated air inlet pipes (103) and exhaust pipes (104) are distributed on two sides of the top of the heat exchange chamber (1), butterfly valves (110) are respectively arranged between each exhaust pipe (104) and a gas collecting pipe a (105), the rear ends of the exhaust pipes (104) are sequentially connected with the gas collecting pipes a (105), the gas collecting pipes b (106) and the gas collecting pipes c (107), and the rear ends of the gas collecting pipes c (107) are connected with a high-temperature induced draft fan (108).
2. The aluminum electrolysis cell side wall waste heat recovery device according to claim 1, wherein: the side wall lining (102) of the electrolytic tank is an integral wall built by combining silicon nitride with silicon carbide hollow bricks.
3. The aluminum electrolysis cell side wall waste heat recovery device according to claim 1, wherein: the air inlet pipe (103) and the exhaust pipe (104) are arranged between the top of the heat exchange chamber (1) and the groove edge plate (112), and a gap in the middle is tamped and sealed by sealing paste (111).
4. The aluminum electrolysis cell side wall waste heat recovery device according to claim 1, wherein: the diameter of the gas collecting tube a (105) is larger than that of the exhaust tube (104), the diameter of the gas collecting tube b (106) is larger than that of the gas collecting tube a (105), and the diameter of the gas collecting tube c (107) is larger than that of the gas collecting tube b (106).
5. The aluminum electrolysis cell side wall waste heat recovery device according to claim 1, wherein: the gas collecting pipes b (106) are fixed on the outer side of the cradle frame (113) of the electrolytic tank, and the cradle frame (113) of the electrolytic tank is uniformly and equidistantly distributed along the long axis direction of the heat exchange chamber (1).
6. The aluminum electrolysis cell side wall waste heat recovery device according to claim 1, wherein: a butterfly valve (110) is arranged between the gas collecting tube a (105) and each exhaust tube (104).
7. The aluminum electrolysis cell side wall waste heat recovery device according to claim 1, wherein: the rear end of the high-temperature induced draft fan (108) is connected with a waste heat utilization system (109).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310291766.9A CN116288534A (en) | 2023-03-23 | 2023-03-23 | Aluminum electrolysis cell side wall waste heat recovery device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310291766.9A CN116288534A (en) | 2023-03-23 | 2023-03-23 | Aluminum electrolysis cell side wall waste heat recovery device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116288534A true CN116288534A (en) | 2023-06-23 |
Family
ID=86779586
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310291766.9A Pending CN116288534A (en) | 2023-03-23 | 2023-03-23 | Aluminum electrolysis cell side wall waste heat recovery device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116288534A (en) |
-
2023
- 2023-03-23 CN CN202310291766.9A patent/CN116288534A/en active Pending
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