CN102134727A - Method for recycling waste heat of electrolytic cell and device thereof - Google Patents
Method for recycling waste heat of electrolytic cell and device thereof Download PDFInfo
- Publication number
- CN102134727A CN102134727A CN 201110057263 CN201110057263A CN102134727A CN 102134727 A CN102134727 A CN 102134727A CN 201110057263 CN201110057263 CN 201110057263 CN 201110057263 A CN201110057263 A CN 201110057263A CN 102134727 A CN102134727 A CN 102134727A
- Authority
- CN
- China
- Prior art keywords
- heat
- electrolyzer
- waste heat
- heat exchanger
- hot
- 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.)
- Granted
Links
Images
Landscapes
- Electrolytic Production Of Metals (AREA)
Abstract
The invention discloses a method for recycling waste heat of an electrolytic cell, and relates to the technical field of the production of electrolytic aluminum. The method comprises the steps of: collecting the waste heat of the electrolytic cell; heating aluminum oxide powder by the heat energy of the waste heat; and collecting the primarily used waste heat for comprehensive utilization. The invention further discloses a device for recycling the waste heat of the electrolytic cell. Due to the devices such as a heat collector, a heat radiator, a heat exchanger and the like, the assembled utilization of a system, and the simple adjustment of the primary electrolysis working procedure and technology, the method can be used for returning the heat energy lost by the electrolytic cell to the electrolytic cell for recycling, thereby achieving the aim of improving the energy use ratio.
Description
Technical field
The present invention relates to the Aluminum Electrolysis Production technical field, particularly relate to the method and the device of electrolyzer heat recovery.
Background technology
Under technical qualification now, the industrialized process for preparing of aluminium is a fused salt electrolysis process, promptly in the electrolyzer of building by laying bricks or stones by refractory materials, alumina powder is dissolved in the fused ionogen (normally under the temperature about 950 ℃), utilize carbon materials to carry out electrolysis, the aluminium element in the aluminum oxide is prepared as pure aluminum as electrode.In order to keep normally carrying out of electrolysis production, electrolyzer must be in a kind of thermal equilibrium state.As the solid-state electrolyte crust of one deck must be set on the sidepiece in electrolyzer, be commonly called as stove group, be not etched damage with the inner lining refractory of protecting electrolyzer, thereby guarantee the long-term operation of electrolyzer; This just requires a big chunk heat of electrolyzer to distribute from the sidepiece of electrolyzer.The high temperature difference of the fire box temperature of electrolyzer and surrounding environment in addition, also must cause a large amount of heats towards periphery environment scatter and disappear.According to measuring and calculating, even utilize modern state-of-the-art electrolyzer and electrolysis process, in the Aluminum Electrolysis Production process, the energy that is scattered and disappeared with the heat energy form almost is 50% of an Aluminum Electrolysis Production total energy consumption.
For energy recovery and the utilization that electrolyzer is scattered and disappeared, the researchist has done a lot of trials by all means, but can not get practical application all the time, trace it to its cause or cost too high, or it is too big to implement difficulty, so far also do not have the heat recovery example of success, the waste heat that is produced in the Aluminum Electrolysis Production process just can only slattern so in vain.
Summary of the invention
The purpose of this invention is to provide a kind of simple and easy to do recovery and utilize the method for residual heat of aluminum reduction cell, and provide residual heat of aluminum reduction cell recovery system and device, the heat energy that aluminium cell is distributed can turn back in the Aluminum Electrolysis Production system, improve the capacity usage ratio of Aluminum Electrolysis Production, improve the economic benefit of Aluminum Electrolysis Production simultaneously.
For achieving the above object, the present invention implements by the following technical programs:
The method of electrolyzer heat recovery of the present invention comprises the step of collecting the electrolyzer waste heat, utilizes the step of waste heat heat energy heated oxide aluminium powder and the waste heat after the elementary utilization is gathered the step that collection fully utilizes again;
Wherein, the step of described collection electrolyzer waste heat is that the waste heat that scatters and disappears in waste heat that separate unit electrolyzer sidepiece is scattered and disappeared and the groove is collected in the electrolyzer cover plate by heat collector A respectively;
The described step of utilizing waste heat heat energy heated oxide aluminium powder is that the waste heat heat energy in the electrolyzer cover plate gathers to heat exchanger A hot-zone by flue, the cold reduction air heating that to pass through from heat exchanger A cold-zone is a hot compressed air, described hot compressed air enters the chute powered compressor air line of upper part of the electrolytic cell, the heated oxide aluminium powder makes aluminum oxide powder improve certain temperature before going into groove;
It is described that waste heat after the elementary utilization is gathered the step that collection fully utilizes again is that heat energy in the heat exchanger A is aggregated into heat exchanger B by the waste heat heat energy after replacing by heat collector B.
The method of implementing above-mentioned electrolyzer heat recovery is specifically related to lower device:
Described device comprises heat collector and heat exchanger;
Wherein, adiabatic baffle plate is established in the coaming plate outer of electrolyzer circle downwards, and on the coaming plate of electrolyzer, electrolyzer side plate and electrolyzer cover plate open several ventilating pits between stretching one's legs, the heat energy of adiabatic baffle plate locking is entered in the space that the electrolyzer cover plate sealed as collecting the electrolyzer sidepiece heat collector A of waste heat of scattering and disappearing in waste heat and the groove that scatters and disappears by ventilating pit;
The vertical permutation and combination of the heat pipe of heat exchanger A places in the casing of heat exchanger A, is provided with the dividing plate that is obliquely installed in the described casing, and the interchanger casing is divided into interchanger cold junction and interchanger hot junction; Described hot junction is provided with hot smoke inlet and exhanst gas outlet; Described cold junction is provided with cold reduction gas inlet and cold side outlet;
The hot smoke inlet of heat exchanger A links to each other with the electrolyzer exhanst gas outlet by flue; The cold side outlet of heat exchanger A is connected to the powered compressor air line of chute; The exhanst gas outlet of heat exchanger A is connected to heat collector B.
Described device, described heat collector B is set to the thermal-insulating type flue.
Described device, the top of described electrolyzer cover plate adds lagging material.
Described device, the height that circle is established adiabatic baffle plate is 18-40cm.
Described device also comprises the scatterer that is arranged on the electrolyzer side, and described scatterer is in the groove or the outer two kinds of forms of groove.
Described device, described heat exchanger B is a hot tube heat exchanger.
The residual heat collection that the present invention is produced the separate unit electrolyzer is in the electrolyzer cover plate, by heat exchanger A the aluminum oxide powder of going into before the groove is heated nearby, this main raw material is improved certain temperature, and minimizing is warmed up to the temperature required energy expenditure of electrolysis after going into groove; And the waste heat of the separate unit electrolyzer of process Preliminary Exploitation gathers by the thermal-insulating type flue and fully utilizes after heat exchanger B swaps out heat energy.
It is the waste heat that collection electrolyzer that the method for electrolytic aluminum UTILIZATION OF VESIDUAL HEAT IN provided by the present invention can either system is produced, can make part of waste heat directly turn back to recycle in the electrolyzer by simple method again by the mode of preheating material, remaining waste heat can also be concentrated and migrate out electrolytic system, for next step comprehensive utilization lays the first stone.
In addition, the temperature that method provided by the invention can be gone into electrolyzer the main raw material aluminum oxide of groove like a cork improves more than 50 ℃, is folded to aluminium per ton and can saves more than original intensification power consumption 60kw.h.
Description of drawings
Fig. 1 is an electrolytic aluminum UTILIZATION OF VESIDUAL HEAT IN method systematic schematic diagram;
Fig. 2 is for collecting the configuration structure of the heat collector A of waste heat in electrolyzer sidepiece waste heat and the groove;
Fig. 3 is connected to the configuration structure of heat exchanger A for the electrolyzer exhanst gas outlet;
Fig. 4 is the configuration structure that utilizes waste heat heat energy heated oxide aluminium powder;
Among the figure: 1, electrolyzer cover plate; 2, ventilating pit; 3, adiabatic baffle plate; 4, coaming plate; 5, side plate; 6, cold reduction gas inlet; 7, heat exchanger A; 8, cold side outlet; 9, exhanst gas outlet; 10, hot smoke inlet; 11, dividing plate; 12, electrolyzer; 13, chute; 14, aluminum oxide powder.
Embodiment
The present invention is by devices such as heat collector, scatterer, heat exchangers, combination utilization by system, and electrowinning process, the technology of former usefulness simply adjusted, the heat energy that electrolyzer scattered and disappeared turned back to again carry out recycle in the electrolyzer, thereby reach the purpose that improves capacity usage ratio.
In conjunction with Fig. 2, based on system design scheme of the present invention, inking device is as follows: circle is established adiabatic baffle plate 3 more than the height 20cm downwards in coaming plate 4 outers of electrolyzer 12, and on the coaming plate 4 of electrolyzer, electrolyzer side plate 5 and electrolyzer cover plate 1 open several ventilating pits 2 between stretching one's legs; The electrolyzer cover plate is being kept adding one deck lagging material at an upper portion thereof under the constant situation of original grown form; The heat energy of adiabatic baffle plate 3 lockings is entered in the space that the electrolyzer cover plate sealed as collecting the electrolyzer sidepiece heat collector A of waste heat of scattering and disappearing in waste heat and the groove that scatters and disappears by ventilating pit 2.
In conjunction with Fig. 3, Fig. 4, the vertical permutation and combination of the heat pipe of heat exchanger A7 places in the casing of heat exchanger A, is provided with the dividing plate 11 that is obliquely installed in the described casing, and the interchanger casing is divided into interchanger cold junction and interchanger hot junction; Described hot junction is provided with hot smoke inlet 10 and exhanst gas outlet 9; Described cold junction is provided with cold reduction gas inlet 6 and cold side outlet 8; The hot smoke inlet of heat exchanger A links to each other with the electrolyzer exhanst gas outlet by flue; The cold side outlet 8 of heat exchanger A is connected to the powered compressor air line of chute 13; The exhanst gas outlet of heat exchanger A is connected to heat collector B, and heat collector B is connected to heat exchanger B.
In conjunction with Fig. 1, when the invention is implemented, when collecting the electrolyzer waste heat, at first be to be locked in the electrolyzer cover focus utilization from electrolyzer cover plate institute dispersed heat originally; Next waste heat and hot fume afterheat that is separate unit electrolyzer sidepiece scatters and disappears is collected in the electrolyzer cover plate by heat collector A, collect heat energy that waste heat that sidepiece scatters and disappears is specially adiabatic baffle plate locking and enter in the space that the electrolyzer cover plate sealed focus utilization by ventilating pit.
Heat collector A collect waste heat heat energy enter the hot smoke inlet of heat exchanger A by flue, the cold reduction air heating that will enter from heat exchanger A cold reduction gas inlet is a hot compressed air, hot compressed air enters chute powered compressor air line from cold side outlet, in the process of chute 13 transmission aluminum oxide powders 14, with the heat exchange of aluminum oxide powder thorough mixing, make aluminum oxide powder before going into groove, improve certain temperature, reduce the energy expenditure that is elevated to electrolysis temperature behind the groove.
The collected heat energy of separate unit electrolyzer cover plate is after elementary utilization on the spot, remaining most of heat energy is medium with the high-temperature flue gas, high-temperature flue gas enters heat collector B by the exhanst gas outlet of heat exchanger A, is aggregated into comprehensive utilization after the displacement among the heat exchanger B through thermal-insulating type flue heat collector B.
Since heat collector with the residual heat collection of electrolyzer under the electrolyzer cover plate, the temperature of electrolytic bath shell face increases, can reduce to some extent from electrolytic bath shell face dispersed heat, want to keep the thermal equilibrium of electrolyzer, just must strengthen heat dissipation capacity from the electrolyzer sidepiece, so the sidepiece at electrolyzer is provided with scatterer, be beneficial to the discharge of heat in the groove, keep the thermal equilibrium of electrolyzer.Described scatterer divides in the groove and the outer two kinds of forms of groove, installs as required.
Claims (7)
1. the method for an electrolyzer heat recovery is characterized in that: comprise the step of collecting the electrolyzer waste heat, utilize the step of waste heat heat energy heated oxide aluminium powder and the waste heat after the elementary utilization is gathered the step that collection fully utilizes again;
Wherein, the step of described collection electrolyzer waste heat is that the waste heat that scatters and disappears in waste heat that separate unit electrolyzer sidepiece is scattered and disappeared and the groove is collected in the electrolyzer cover plate (1) by heat collector A respectively;
The described step of utilizing waste heat heat energy heated oxide aluminium powder is that the waste heat heat energy in the electrolyzer cover plate gathers to heat exchanger A (7) hot-zone by flue, the cold reduction air heating that to pass through from heat exchanger A cold-zone is a hot compressed air, described hot compressed air enters chute (13) the powered compressor air line of upper part of the electrolytic cell, the heated oxide aluminium powder makes aluminum oxide powder improve certain temperature before going into groove;
It is described that waste heat after the elementary utilization is gathered the step that collection fully utilizes again is that heat energy in the heat exchanger A is aggregated into heat exchanger B by the waste heat heat energy after replacing by heat collector B.
2. implement the method for the described electrolyzer heat recovery of claim 1, it is characterized in that: relate to lower device:
Described device comprises heat collector and heat exchanger;
Wherein, adiabatic baffle plate (3) is established in the coaming plate of electrolyzer (4) outer circle downwards, and go up at the coaming plate (4) of electrolyzer, electrolyzer side plate (5) and electrolyzer cover plate (1) open several ventilating pits (2) between stretching one's legs, and the heat energy of adiabatic baffle plate (3) locking is entered in the space that electrolyzer cover plate (1) sealed heat collector A as lost waste heat of collection electrolyzer sidepiece and the interior lost waste heat of groove by ventilating pit (2);
The vertical permutation and combination of heat pipe of heat exchanger A (7) places in the casing of heat exchanger A, is provided with the dividing plate (11) that is obliquely installed in the described casing, and the interchanger casing is divided into interchanger cold junction and interchanger hot junction; Described hot junction is provided with hot smoke inlet (10) and exhanst gas outlet (9); Described cold junction is provided with cold reduction gas inlet (6) and cold side outlet (8);
The hot smoke inlet of heat exchanger A links to each other with the electrolyzer exhanst gas outlet by flue; The cold side outlet of heat exchanger A is connected to the powered compressor air line of chute; The exhanst gas outlet of heat exchanger A is connected to heat collector B.
3. device according to claim 2 is characterized in that: described heat collector B is set to the thermal-insulating type flue.
4. device according to claim 2 is characterized in that: the top of described electrolyzer cover plate (1) adds lagging material.
5. device according to claim 2 is characterized in that: the height that circle is established adiabatic baffle plate (3) is 18-40cm.
6. device according to claim 2 is characterized in that: also comprise the scatterer that is arranged on the electrolyzer side, described scatterer is in the groove or the outer two kinds of forms of groove.
7. device according to claim 2 is characterized in that: described heat exchanger B is a hot tube heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100572632A CN102134727B (en) | 2011-03-10 | 2011-03-10 | Method for recycling waste heat of electrolytic cell and device thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100572632A CN102134727B (en) | 2011-03-10 | 2011-03-10 | Method for recycling waste heat of electrolytic cell and device thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102134727A true CN102134727A (en) | 2011-07-27 |
| CN102134727B CN102134727B (en) | 2012-10-31 |
Family
ID=44294644
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100572632A Expired - Fee Related CN102134727B (en) | 2011-03-10 | 2011-03-10 | Method for recycling waste heat of electrolytic cell and device thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102134727B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102943287A (en) * | 2012-11-12 | 2013-02-27 | 东南大学 | Wind and solar aluminium electrolysis device |
| CN105803491A (en) * | 2014-12-30 | 2016-07-27 | 贵阳铝镁设计研究院有限公司 | Heat reclamation device for sidewall of aluminium reduction cell |
| CN107858705A (en) * | 2017-12-06 | 2018-03-30 | 中国铝业股份有限公司 | A kind of heat preserving method of aluminium cell |
| CN108233772A (en) * | 2017-12-07 | 2018-06-29 | 中国铝业股份有限公司 | A kind of method of aluminium electrolytic flue cogeneration |
| CN110894614A (en) * | 2018-09-13 | 2020-03-20 | 沈阳铝镁设计研究院有限公司 | Device for preheating and conveying aluminum oxide by forced ventilation of electrolytic cell |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2558813C1 (en) * | 2014-03-28 | 2015-08-10 | Федеральное Государственное Автономное Образовательное Учреждение Высшего Профессионального Образования "Сибирский Федеральный Университет" | Method and device for utilisation of heat of anode gases of aluminium electrolyser |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4160809A (en) * | 1978-07-24 | 1979-07-10 | Kaiser Aluminum & Chemical Corporation | Modified pyrohydrolysis process for spent aluminum reduction cell linings |
| EP1395529A1 (en) * | 2001-05-30 | 2004-03-10 | MOLTECH Invent S.A. | Carbon tiles with refractory coating for use at elevated temperature |
| CN101031673A (en) * | 2004-07-23 | 2007-09-05 | 诺尔斯海德公司 | A method and equipment for heat recovery |
| CN101305114A (en) * | 2005-11-14 | 2008-11-12 | 普基铝业 | Electrolytic cell with a heat exchanger |
| CN101435089A (en) * | 2008-12-03 | 2009-05-20 | 北京佰能电气技术有限公司 | System and method for utilizing residual heat of electrolyzer low temperature flue gas |
| CN101880898A (en) * | 2009-05-04 | 2010-11-10 | 厦门热工环保系统工程有限公司 | Method for recovering flue gas waste heat of aluminum electrolysis cell |
-
2011
- 2011-03-10 CN CN2011100572632A patent/CN102134727B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4160809A (en) * | 1978-07-24 | 1979-07-10 | Kaiser Aluminum & Chemical Corporation | Modified pyrohydrolysis process for spent aluminum reduction cell linings |
| EP1395529A1 (en) * | 2001-05-30 | 2004-03-10 | MOLTECH Invent S.A. | Carbon tiles with refractory coating for use at elevated temperature |
| CN101031673A (en) * | 2004-07-23 | 2007-09-05 | 诺尔斯海德公司 | A method and equipment for heat recovery |
| CN101305114A (en) * | 2005-11-14 | 2008-11-12 | 普基铝业 | Electrolytic cell with a heat exchanger |
| CN101435089A (en) * | 2008-12-03 | 2009-05-20 | 北京佰能电气技术有限公司 | System and method for utilizing residual heat of electrolyzer low temperature flue gas |
| CN101880898A (en) * | 2009-05-04 | 2010-11-10 | 厦门热工环保系统工程有限公司 | Method for recovering flue gas waste heat of aluminum electrolysis cell |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102943287A (en) * | 2012-11-12 | 2013-02-27 | 东南大学 | Wind and solar aluminium electrolysis device |
| CN105803491A (en) * | 2014-12-30 | 2016-07-27 | 贵阳铝镁设计研究院有限公司 | Heat reclamation device for sidewall of aluminium reduction cell |
| CN107858705A (en) * | 2017-12-06 | 2018-03-30 | 中国铝业股份有限公司 | A kind of heat preserving method of aluminium cell |
| CN108233772A (en) * | 2017-12-07 | 2018-06-29 | 中国铝业股份有限公司 | A kind of method of aluminium electrolytic flue cogeneration |
| CN110894614A (en) * | 2018-09-13 | 2020-03-20 | 沈阳铝镁设计研究院有限公司 | Device for preheating and conveying aluminum oxide by forced ventilation of electrolytic cell |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102134727B (en) | 2012-10-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102134727B (en) | Method for recycling waste heat of electrolytic cell and device thereof | |
| CN102748955B (en) | Heat-energy recovery system of high-temperature material | |
| CN102154663A (en) | Method for preheating alumina by using smoke afterheat from aluminium electrolysis production | |
| CN107445156A (en) | A kind of graphitizing furnace with quick cooling and function of recovering waste heat | |
| CN206177055U (en) | Electric stove high temperature smoke and dust utilizes and dust collector | |
| CN100453944C (en) | Method for smoke gas residual heat utilization and device therefor | |
| CN203768043U (en) | Roasting transformation, distributing and cooling-recovery production device of spodumene | |
| CN203731438U (en) | Resourceful treatment system for electrolytic aluminium waste cathode blocks | |
| CN202692089U (en) | Light type membrane-wall water-cooling air hopper | |
| CN201724382U (en) | Energy-saving hot blast stove | |
| CN204661791U (en) | Two-stage calcination method ore reduction volatilization interlock production system | |
| CN207635819U (en) | A kind of solar energy heating conduction oil dry kiln heating system | |
| CN206037406U (en) | Biomass hot blast stove | |
| CN201697472U (en) | Submerged-arc furnace cover afterheat boiler | |
| CN104087690A (en) | Thermal energy recovery device and thermal energy recovery method of high-temperature slag | |
| CN205774823U (en) | Aluminum cell side cooling system | |
| CN203421981U (en) | Heat exchanger for kiln flue gas waste heat recovery | |
| CN208588250U (en) | A kind of manufacture of cement low-carbon type preheater | |
| CN203231568U (en) | Flat-plate efficient heat absorber combining solar energy with air-energy heat pump | |
| CN202770227U (en) | Heat recovery system for high-temperature materials | |
| CN204594260U (en) | A kind of central cooler Low Temperature Thermal waste gas utilize system | |
| CN206345823U (en) | Coke dry quenching furnace structure and red burnt sensible heat power generation system | |
| CN205237273U (en) | Novel high temperature stove of brazing | |
| CN206033672U (en) | Improve ramp's poor gas heating coke oven | |
| Lang et al. | Study on the Energy-Saving Technology of Chinese Shaft Calciners |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121031 Termination date: 20130310 |