CN203582982U - Forced heat transfer type aluminum electrolytic tank - Google Patents
Forced heat transfer type aluminum electrolytic tank Download PDFInfo
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- CN203582982U CN203582982U CN201320622941.XU CN201320622941U CN203582982U CN 203582982 U CN203582982 U CN 203582982U CN 201320622941 U CN201320622941 U CN 201320622941U CN 203582982 U CN203582982 U CN 203582982U
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Abstract
The utility model discloses a forced heat transfer type aluminum electrolytic tank comprising an electrolytic tank body. The forced heat transfer type aluminum electrolytic tank is characterized in that a shell of the electrolytic tank body is externally provided with a heat exchanger taking heat conducting oil as a heat exchange medium. According to the utility model, the heat dissipating capacity of the electrolytic tank can be controlled through controlling the inlet/outlet oil temperature of the heat exchanger and the flux of heat conducting oil and the heat balance of the electrolytic tank can be further controlled, so that the electrolytic tank always operates under a stable heat balance condition, a good and stable inner model of the electrolytic tank can be favorably formed while the residual heat resource is effectively recycled, the current efficiency can be increased, and the service life of the electrolytic tank can be prolonged.
Description
Technical field
The utility model relates to Aluminium Electrolysis technology, relates to specifically a kind of pressure heat transfer (energy-conservation) type aluminium cell.
Background technology
Aluminium is to produce with the method for fused salt electrolysis aluminum oxide, the Molten of aluminium need to consume a large amount of electric energy, according to the statistics of relevant department: within 2012, China's electrolytic aluminum output is 1,968 ten thousand tons, the average about 14000kWh/t.Al of aluminium ingot Integrated Exchange power consumption in the whole nation, the electric energy that the aluminium electrolytic industry of China consumes at present accounts for 86% of whole non-ferrous metals industry energy consumption, accounts for 5.5% of national electric power wastage in bulk or weight.Therefore the power consumption that reduces Aluminium Electrolysis has important energy-saving significance, meets the industry policy of national energy-saving consumption reduction.
Over nearly more than 20 years, Aluminium Electrolysis technology has had very large progress both at home and abroad, the capacity of electrolyzer develops into 300 present～400kA from the 60～200kA in last century, the test of WKG working 500kA electrolyzer at present, the automatic control level of designing technique and computer has had qualitative leap, but the direct current consumption of Aluminium Electrolysis is hovered between 12000～13000kWh/t.Al always, and theoretical electric energy efficiency only has 50% left and right.Therefore, Aluminium Industry significantly energy-conserving and emission-cutting technology be domestic and international aluminium industry technology worker's emphasis main goal of attack and industry development trend always.
If China's Aluminium Electrolysis reduces by 1000 kWh/t.Al on existing power consumption basis at present, by the production status of current China electrolysis of aluminum aluminium, year can be saved the electric energy of 20,000,000,000 kWh.Be converted into the energy consumption being produced by coal power generation, by 1kWh, need 350g standard coal consumption to calculate, be equivalent to save 7,000,000 tons/year of standard coals.Reduce significantly the power consumption of Aluminium Electrolysis for this reason, realize China's target for energy-saving and emission-reduction, guarantee that the Sustainable development of national economy is necessary greatly, its meaning and effect are great.
The theoretical power consumption of ton electrolysis of aluminum is approximately 6330kWh, and under current state of the art, it is about 50% that the utilization rate of electrical of electrolysis of aluminum only has, and remaining energy has all fallen by heat lost by radiation.And meanwhile, due to the maximization of aluminium cell, the thermal value of unit area of dissipation is increasing, how more dissipation of heat is gone out, become the important topic of electrolyzer thermal Equilibrium Design.Just there is an antinomy in this, the capacity usage ratio of electrolyzer is very low on the one hand, and large energy all distribution loss has fallen, and on the other hand, can not be incubated to reduce scattering and disappearing of energy by reinforcement again, also will strengthen on the contrary heat radiation to maintain the thermal equilibrium of electrolyzer.The basic reason that occurs this problem is, the resistance of electrolyzer self is larger, electric current by time the pressure drop that produces higher, thermal value is far longer than the actual required energy of thermal material that adds.
Electrolytic aluminum unit of electrical energy consumes
can use following formulate:
In formula:
---effective unit power consumption
;
2.98---the phone equivalent (Ah/kg) of aluminium;
V---bath voltage (V);
η---the mean current efficiency in this time period.
Thereby the approach that improves electrolyzer capacity usage ratio can only be to improve current efficiency, reduces bath voltage, or waste heat is collected to recycling.
The current efficiency of modern large-scale aluminum electrolytic cell has reached 95% left and right, the limited space further improving under prior art condition.Under the prerequisite that guarantees current efficiency, reduce bath voltage and also have great difficulty.The pressure drop of electrolyzer is mainly shared and is formed by bus pressure drop, anode drop, ionogen pressure drop, decomposition voltage, cathode drop and effect.Its median generatrix pressure drop depends mainly on installation quality and cabling design, anode drop depends mainly on quality of anode and each several part quality of connection, ionogen pressure drop depends mainly on electrode distance and electrolyte ingredient and temperature, decomposition pressure is by major decision and temperature and electrode materials, cathode drop depends mainly on negative electrode material and bottom land operating mode, and effect is shared effect coefficient and the effect time of depending mainly on.Visible, reduce the major measure of bath voltage and also will set about from these aspects, as reducing electrolyte voltage, (1) falls; (2) reduce polarizing voltage; (3) strengthen the sectional area of bus bar; (4) improve conductor contact; (5) reduce cathode drop; (6) reduce anode effect etc.In recent years, aspect the pressure drop of reduction electrolyzer, obtaining some important technological achievements, but under prior art condition, further reducing bath voltage difficulty very large.Therefore to further reduce electrolyzer energy consumption, improve energy utilization efficiency, can only make an issue of from UTILIZATION OF VESIDUAL HEAT IN, and the space of UTILIZATION OF VESIDUAL HEAT IN be also very huge.
The main path of electrolyzer heat loss is: trench bottom, and heat dissipation capacity is about total heat dissipation capacity 15%; Groove sidepiece (comprising that groove is along plate), heat dissipation capacity is about 50%; Groove top and flue gas, heat dissipation capacity is about 35%.Visible, the heat of about 65% left and right of electrolyzer loses by electrolyzer box hat from bottom and sidepiece.If install heat-exchanger rig additional on box hat, this part of heat collection is used, just can reduce to a great extent electrolyzer energy consumption.
Summary of the invention
The purpose of this utility model provides a kind of pressure heat transfer (energy-conservation) type aluminium cell just for existing weak point in above-mentioned prior art.
The purpose of this utility model can realize by following technique measures:
Pressure heat transfer type aluminium cell of the present utility model comprises electrolyzer body, is provided with to take the interchanger that thermal oil is heat transferring medium on the body skin of described electrolyzer body.
Interchanger described in the utility model is to form by being coated on jacket structured outside electrolyzer box hat, and with flange, is connected between interchanger and external pipeline, and junction is provided with for making the insulating element of interchanger and external pipeline insulation.
More specifically, the interchanger described in the utility model comprises that groove forms along interchanger, bottom land interchanger and sidewall interchanger; Described heat conduction oil outlet temperature is controlled at 200-300 ℃, and deep fat sends into waste heat boiler or other heat-exchange equipments carry out UTILIZATION OF VESIDUAL HEAT IN, and recycles.
The beneficial effects of the utility model are as follows:
The utility model is imported and exported oil temperature and thermal oil flow control by heat exchanger, control the heat dissipation capacity of electrolyzer, can realize the thermally equilibrated control of electrolyzer, electrolyzer is operated under stable thermal equilibrium condition all the time, in efficient recovery residual heat resources, contribute to form type in good stable electrolyzer, improve current efficiency and bath life.
Accompanying drawing explanation
Fig. 1 is the structural representation of prior art.
Fig. 2 is structural representation of the present utility model.
Sequence number in figure: the 1st, groove is along plate, and the 2nd, lateral mass, the 3rd, artificial stretching one's legs, the 4th, body skin, the 5th, impervious barrier, the 6th, cathode steel bar, the 7th, negative electrode, the 8th, groove is along interchanger, and the 9th, sidewall interchanger, the 10th, bottom land interchanger.
Embodiment
The utility model is further described below with reference to embodiment (accompanying drawing):
As shown in Figure 2, pressure heat transfer type aluminium cell of the present utility model comprises electrolyzer body, is provided with to take the interchanger that thermal oil is heat transferring medium on the body skin 6 of described electrolyzer body; Described interchanger is to form by being coated on jacket structured outside electrolyzer box hat, and with flange, is connected between interchanger and external pipeline, and junction is provided with for making the insulating element of interchanger and external pipeline insulation.Wherein said insulating element is to consist of ceramic insulation packing ring or ceramic insulating tube; At described interchanger and external pipeline (oil pipe), be outside equipped with adiabator layer.
More specifically, the interchanger described in the utility model comprises that groove forms along interchanger 8, bottom land interchanger 10 and sidewall interchanger 9; Described heat conduction oil outlet temperature is controlled at 200-300 ℃, and deep fat sends into waste heat boiler or other heat-exchange equipments carry out UTILIZATION OF VESIDUAL HEAT IN, and recycles.
In addition, the utility model can arrange short circuit arm and valve at thermal oil circulation line, part or all of deep fat short circuit directly can be back to electrolyzer without UTILIZATION OF VESIDUAL HEAT IN where necessary, with regulating electrolytic tank interchanger import oil temperature; By heat exchanger, import and export oil temperature and thermal oil flow control, control the heat dissipation capacity of electrolyzer, can realize the thermally equilibrated control of electrolyzer, electrolyzer is operated under stable thermal equilibrium condition all the time, in efficient recovery residual heat resources, contribute to form type in good stable electrolyzer, improve current efficiency and bath life.
Specific experiment data instance of the present utility model is as follows:
Experimental example 1.
These routine reference technique data are: 400kA electrolyzer, pot shell is of a size of 22.0 * 4.5 * 1.5m bath voltage 4.0V, current efficiency 94%.As only installed interchanger additional at sidepiece: heat dissipation power 320kW, thermal oil flow 2.4m
3/ h, 50 ℃ of thermal oil temperature ins, 250 ℃ of temperature outs.As deep fat capacity usage ratio 50%, ton aluminium economize on electricity 1280kWh, reduces energy consumption 10%.
Experimental example 2.
These routine reference technique data are: 300kA electrolyzer, pot shell is of a size of 15.5 * 4.5 * 1.5m, bath voltage 4.0V, current efficiency 94%.As whole box hat all installs interchanger additional: heat radiation power 390kW, thermal oil flow 2.9m
3/ h, 40 ℃ of thermal oil temperature ins, 240 ℃ of temperature outs.As deep fat capacity usage ratio 50%, ton aluminium economize on electricity 2062kWh, reduces energy consumption 16%.
Experimental example 3.
These routine reference technique data are: a serial 300kA electrolyzer, and 100 of groove number of units, pot shell is of a size of 15.5 * 4.5 * 1.5m, bath voltage 4.0V, current efficiency 94%.As whole box hat all installs interchanger additional: heat radiation power 39000kW, thermal oil flow 290m
3/ h, 40 ℃ of thermal oil temperature ins, 240 ℃ of temperature outs.As deep fat capacity usage ratio 50%, ton aluminium economize on electricity 2062kWh, year economize on electricity total amount 1.685 * 10
8kWh, is equivalent to 60,000 tons of mark coals.
Claims (1)
1. force a heat transfer type aluminium cell, comprise electrolyzer body, it is characterized in that: at the body skin of described electrolyzer body, be outside equipped with and take the interchanger that thermal oil is heat transferring medium; Described interchanger is to form by being coated on jacket structured outside electrolyzer box hat, and with flange, is connected between interchanger and external pipeline, and junction is provided with for making the insulating element of interchanger and external pipeline insulation; Described interchanger comprises that groove forms along interchanger, bottom land interchanger and sidewall interchanger; Described heat conduction oil outlet temperature is controlled at 200-300 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320622941.XU CN203582982U (en) | 2013-10-10 | 2013-10-10 | Forced heat transfer type aluminum electrolytic tank |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320622941.XU CN203582982U (en) | 2013-10-10 | 2013-10-10 | Forced heat transfer type aluminum electrolytic tank |
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| Publication Number | Publication Date |
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| CN203582982U true CN203582982U (en) | 2014-05-07 |
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| CN201320622941.XU Expired - Fee Related CN203582982U (en) | 2013-10-10 | 2013-10-10 | Forced heat transfer type aluminum electrolytic tank |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108411341A (en) * | 2018-02-12 | 2018-08-17 | 中国电力科学研究院有限公司 | A method of the thermal balance regulating system of the unstable new energy of consumption and realization |
| CN112210794A (en) * | 2019-07-10 | 2021-01-12 | 郑州轻冶科技股份有限公司 | Aluminum electrolysis energy balance adjusting method and system based on molecular ratio and aluminum electrolysis cell |
| CN112210793A (en) * | 2020-10-19 | 2021-01-12 | 郑州轻冶科技股份有限公司 | Aluminum electrolytic cell with heat pipe heat exchanger on side part |
-
2013
- 2013-10-10 CN CN201320622941.XU patent/CN203582982U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108411341A (en) * | 2018-02-12 | 2018-08-17 | 中国电力科学研究院有限公司 | A method of the thermal balance regulating system of the unstable new energy of consumption and realization |
| CN108411341B (en) * | 2018-02-12 | 2022-05-31 | 中国电力科学研究院有限公司 | Heat balance adjusting system for absorbing unstable new energy and implementation method |
| CN112210794A (en) * | 2019-07-10 | 2021-01-12 | 郑州轻冶科技股份有限公司 | Aluminum electrolysis energy balance adjusting method and system based on molecular ratio and aluminum electrolysis cell |
| CN112210794B (en) * | 2019-07-10 | 2021-12-21 | 郑州轻冶科技股份有限公司 | Aluminum electrolysis energy balance adjusting method and system based on molecular ratio and aluminum electrolysis cell |
| CN112210793A (en) * | 2020-10-19 | 2021-01-12 | 郑州轻冶科技股份有限公司 | Aluminum electrolytic cell with heat pipe heat exchanger on side part |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140507 Termination date: 20151010 |
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| EXPY | Termination of patent right or utility model |