CN101928963A - System and method for reducing temperature of electrolysis flue gas - Google Patents
System and method for reducing temperature of electrolysis flue gas Download PDFInfo
- Publication number
- CN101928963A CN101928963A CN2009100121880A CN200910012188A CN101928963A CN 101928963 A CN101928963 A CN 101928963A CN 2009100121880 A CN2009100121880 A CN 2009100121880A CN 200910012188 A CN200910012188 A CN 200910012188A CN 101928963 A CN101928963 A CN 101928963A
- Authority
- CN
- China
- Prior art keywords
- flue gas
- temperature
- electrolysis
- discharging pipe
- smoke discharging
- 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
Links
Images
Landscapes
- Electrolytic Production Of Metals (AREA)
Abstract
The invention discloses a system and a method for reducing the temperature of flue gas, in particular to a system and a method for reducing the temperature of electrolysis flue gas in a flue gas purification system of an electrolytic aluminium manufacturer. The method for reducing the temperature of the electrolysis flue gas is characterized in that a flue gas cooling device is arranged on a flue gas discharge duct in an electrolysis shop, and temperature detecting devices are arranged before and behind the cooling device. When the temperature detecting device before the cooling device detects that the temperature of the flue gas exceeds a set value, the flue gas cooling device is started to cool the flue gas in the flue gas discharge duct. The invention reduces the temperature of the electrolysis flue gas in the flue gas discharge duct so as to further reduce the flow of the electrolysis flue gas in working conditions, and one-time investment and operating cost are reduced. The reduction of flue gas temperature is beneficial to the absorption of hydrogen fluoride in the electrolysis flue gas of aluminum oxide, and the absorption effect is improved.
Description
Technical field
The present invention relates to a kind of system and method that reduces flue-gas temperature, particularly relate to a kind of system and method that in the electrolytic aluminium factory flue gas purification system, reduces temperature of electrolysis flue gas.
Background technology
In the Aluminium Electrolysis process, electrolyzer can produce the high-temperature electrolysis flue gas based on carbonic acid gas, temperature at electrolyzer smoke discharging pipe outlet flue gas is generally 140～150 ℃, and in summer or the higher relatively area of envrionment temperature, flue-gas temperature may reach 160～170 ℃, even can be higher.When calcination started, because electrolyzer gives out a large amount of heats, tunnel gas also can raise in addition.And,, also needing flue gas to take a large amount of surplus heats out of in order to keep the thermal equilibrium in the groove along with the maximization of electrolyzer, the flue-gas temperature that will cause discharging also has trend of rising.
The rising of flue-gas temperature can cause the increase of exhaust gas volumn, and then increases the smoke discharging pipe sectional area, causes the increase of smoke discharging pipe construction cost and civil engineering support cost; The increase of exhaust gas volumn also can cause the increase of sack cleaner filtration area, the increase of induced draft fan power, the investment and the running cost of increase purification system.On the other hand, the rising of flue-gas temperature has also improved the requirement of sack cleaner filtrate material.High-temperature flue gas not only damages cloth bag easily, also can cause the reduction of alumina adsorption efficient.Studies show that the adsorption efficiency of aluminum oxide reduces along with the rising of flue-gas temperature, when flue-gas temperature was higher than 125 ℃, aluminum oxide will reduce greatly to the adsorption efficiency of fluorine.
Therefore temperature of electrolysis flue gas has great importance to construction investment, operation.
Summary of the invention
The present invention provides a kind of system and method that reduces temperature of electrolysis flue gas in order to solve the problems of the technologies described above, purpose is in order to realize reducing the tunnel gas temperature, and then reduces the tunnel gas amount, reduces once investment and running cost.
For reaching above-mentioned purpose, the present invention realizes like this:
A kind of system that reduces temperature of electrolysis flue gas is provided with flue gas cooling device on the smoke discharging pipe of potroom, on the smoke discharging pipe temperature testing equipment is set before and after refrigerating unit, and temperature testing equipment is connected with the watch-keeping cubicle.
Described flue refrigerating unit is the combination of any one or several persons in spray equipment, serpentine tube, the radiator element.
Described serpentine tube is arranged in the smoke discharging pipe, and serpentine tube is connected with water pump.
Described spray equipment, structure is as follows: water pipe and nozzle are set in flue, and water pipe is connected with water pump.
Described serpentine tube is arranged on outside the smoke discharging pipe, and serpentine tube is connected with water pump.
Described radiator element is welded on outside the smoke discharging pipe.
Described temperature testing equipment is preceding thermopair and the back thermopair that is installed on the smoke discharging pipe.
The method of described reduction temperature of electrolysis flue gas, on the smoke discharging pipe of potroom, flue gas cooling device is set, temperature testing equipment is set before and after refrigerating unit, when the Temperature Detector before the refrigerating unit detects flue-gas temperature above set(ting)value, flue gas cooling device starts, and flue gas in the flue is cooled off.
Advantage of the present invention and effect are as follows:
For one be 2,000 originally, 000m
3The purification system of/h, the electrolysis flue gas of the total head 3800Pa of system purifies, and adopts system and method for the present invention, if flue-gas temperature is dropped to 110 ℃ by 150 ℃, then exhaust gas volumn can reduce about 10%, just 200,000m
3The exhaust gas volumn of/h, direct result are to reduce many tablecloths bag dust collector, and the total power of induced draft fan reduces about 200kw/h, has huge economic benefit.
And the reduction of temperature of electrolysis flue gas also has great importance for the adsorption effect of aluminum oxide, the process of absorption can be improved about 20% under these conditions.If the temperature of flue gas is reduced to about 90 ℃, make the flue gas flow of pipeline maintain a metastable state at any time, for purification system, can significantly reduce the rich coefficient in the system design, and then reduce one-time investment and running cost, also help the steady running of system.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention 1.
Fig. 2 is the side-looking structural representation of Fig. 1.
Fig. 3 is the structural representation of the embodiment of the invention 2.
Fig. 4 is the side-looking structural representation of Fig. 3.
Fig. 5 is that refrigerating unit of the present invention is the structural representation of radiator element.
Fig. 6 is the side-looking structural representation of Fig. 5.
Fig. 7 is that refrigerating unit of the present invention is the structural representation of outside serpentine tube.
Fig. 8 is the side-looking structural representation of Fig. 7.
Among the figure: 1, smoke discharging pipe; 2, radiator element; 3, serpentine tube; 4, preceding thermopair; 5, water pump; 6, water pipe; 7, nozzle; 8, back thermopair; 9, watch-keeping cubicle.
Embodiment
Below in conjunction with accompanying drawing the present invention is described in detail, but protection scope of the present invention is not limit by embodiment.
Embodiment 1:
As depicted in figs. 1 and 2, reduce the system of temperature of electrolysis flue gas, on the smoke discharging pipe 1 of potroom flue gas cooling device is set, on the smoke discharging pipe 1 temperature testing equipment is set before and after refrigerating unit, temperature testing equipment is connected with watch-keeping cubicle 9.Temperature testing equipment is preceding thermopair 4 and the back thermopair 8 that is installed on the smoke discharging pipe 1.Above-mentioned flue gas cooling device is the inner cooling of serpentine tube, serpentine tube 3 is arranged in the smoke discharging pipe 1, serpentine tube 3 is connected with water pump 5, front and back are provided with thermopair 4 and 8, when thermopair 4 detects flue-gas temperature above set(ting)value, in serpentine tube, inject cold water by water pump 5, cold water moves along the direction opposite with air-flow, the water that comes out from serpentine tube injects pond cooling, recycle.Serpentine tube adopts heat conductivility material preferably.The cooled smoke thermopair detects with thermopair 8, when cooling does not reach the flue-gas temperature of setting, increases the flow velocity of water coolant or the length or the progression of increase serpentine tube and realizes.
The method of described reduction temperature of electrolysis flue gas, on the smoke discharging pipe of potroom, flue gas cooling device is set, temperature testing equipment is set before and after refrigerating unit, when the Temperature Detector before the refrigerating unit detects flue-gas temperature above set(ting)value, flue gas cooling device starts, and flue gas in the flue is cooled off.
Embodiment 2:
As shown in Figure 3 and Figure 4, reduce the system of temperature of electrolysis flue gas, on the smoke discharging pipe 1 of potroom flue gas cooling device is set, on the smoke discharging pipe 1 temperature testing equipment is set before and after refrigerating unit, temperature testing equipment is connected with watch-keeping cubicle 9.Temperature testing equipment is preceding thermopair 4 and the back thermopair 8 that is installed in smoke discharging pipe 1.Above-mentioned flue gas cooling device is a spray equipment, and structure is as follows: water pipe 6 and nozzle 7 are set in flue 1, and water pipe 6 is connected with water pump 5, adds pressurized air in case of necessity and water coolant is helped blows, and improves the winding-up effect of water coolant in the nozzle.Determine the size of injection flow rate to provide water former according to the detected result of thermopair 8 by water pump 5.Make in this way, the temperature of flue gas can not be lower than 110 ℃, avoids moisture to deposit in flue gas.
The method of described reduction temperature of electrolysis flue gas, on the smoke discharging pipe of potroom, flue gas cooling device is set, temperature testing equipment is set before and after refrigerating unit, when the Temperature Detector before the refrigerating unit detects flue-gas temperature above set(ting)value, flue gas cooling device starts, and flue gas in the flue is cooled off.
Embodiment 3:
As shown in Figure 5 and Figure 6, reduce the system of temperature of electrolysis flue gas, on the smoke discharging pipe 1 of potroom flue gas cooling device is set, on the smoke discharging pipe 1 temperature testing equipment is set before and after refrigerating unit, temperature testing equipment is connected with watch-keeping cubicle 9.Temperature testing equipment is preceding thermopair 4 and the back thermopair 8 that is installed in smoke discharging pipe 1.Above-mentioned flue gas cooling device is a radiator element 2, just at smoke discharging pipe 1 external welding radiator element, utilizes the heat transfer coefficient senior general heat of iron and steel to distribute.Heat dissipating method is with implementing 1.
Embodiment 4:
As shown in Figure 7 and Figure 8, reduce the system of temperature of electrolysis flue gas, on the smoke discharging pipe 1 of potroom flue gas cooling device is set, on the smoke discharging pipe 1 temperature testing equipment is set before and after refrigerating unit, temperature testing equipment is connected with watch-keeping cubicle 9.Temperature testing equipment is preceding thermopair 4 and the back thermopair 8 that is installed in smoke discharging pipe 1.
Above-mentioned flue gas cooling device is the serpentine tube exterior cooling, at smoke discharging pipe 1 outer setting serpentine tube 3, relies on water pump 5 to carry water coolant that flue gas is lowered the temperature in serpentine tube 3.Back thermopair 8 detects the flue gas downstream temperature, relies on the height of detected temperatures to regulate service discharge.Backwater enters in the pond, recycles behind the naturally cooling.Heat dissipating method is with implementing 1.
Embodiment 5:
Flue gas cooling device can adopt embodiment 1 and 4 bonded modes to cool off.
Embodiment 6:
Flue gas cooling device can adopt embodiment 2 and 3 or 4 bonded modes to cool off.
Claims (8)
1. reduce the system of temperature of electrolysis flue gas, it is characterized in that on the smoke discharging pipe (1) at potroom flue gas cooling device being set, on the smoke discharging pipe (1) temperature testing equipment is set before and after refrigerating unit, temperature testing equipment is connected with watch-keeping cubicle (9).
2. according to the system of the described reduction temperature of electrolysis flue gas of claim 1, it is characterized in that described flue refrigerating unit is the combination of any one or several persons in spray equipment, serpentine tube (3), the radiator element (2).
3. according to the system of the described reduction temperature of electrolysis flue gas of claim 2, it is characterized in that described serpentine tube (3) is arranged in the smoke discharging pipe (1), serpentine tube (3) is connected with water pump (5).
4. according to the system of the described reduction temperature of electrolysis flue gas of claim 2, it is characterized in that described spray equipment structure is as follows: water pipe (6) and nozzle (7) are set in flue (1), and water pipe (6) is connected with water pump (5).
5. according to the system of the described reduction temperature of electrolysis flue gas of claim 2, it is characterized in that described serpentine tube (3) is arranged on outside the smoke discharging pipe (1), serpentine tube (3) is connected with water pump (5).
6. according to the system of the described reduction temperature of electrolysis flue gas of claim 2, it is characterized in that described radiator element (2) is welded on outside the smoke discharging pipe (1).
7. according to the system of the described reduction temperature of electrolysis flue gas of claim 1, it is characterized in that described temperature testing equipment is for being installed in preceding thermopair (4) and the back thermopair (8) on the smoke discharging pipe (1).
8. the method for the described reduction temperature of electrolysis flue gas of claim 1, it is characterized in that on the smoke discharging pipe of potroom, flue gas cooling device being set, temperature testing equipment is set before and after refrigerating unit, when the Temperature Detector before the refrigerating unit detects flue-gas temperature above set(ting)value, flue gas cooling device starts, and flue gas in the flue is cooled off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100121880A CN101928963A (en) | 2009-06-23 | 2009-06-23 | System and method for reducing temperature of electrolysis flue gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100121880A CN101928963A (en) | 2009-06-23 | 2009-06-23 | System and method for reducing temperature of electrolysis flue gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101928963A true CN101928963A (en) | 2010-12-29 |
Family
ID=43368377
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100121880A Pending CN101928963A (en) | 2009-06-23 | 2009-06-23 | System and method for reducing temperature of electrolysis flue gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101928963A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102200499A (en) * | 2011-04-26 | 2011-09-28 | 江苏省电力设计院 | Device for measuring temperature and humidity of flue gas in spraying equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1904539A (en) * | 2006-06-05 | 2007-01-31 | 江苏双良空调设备股份有限公司 | Finned heat exchange tube and manufacturing method thereof |
| CN101226032A (en) * | 2007-08-31 | 2008-07-23 | 烟台众力电力节能有限公司 | Waste steam utilization equipment |
| WO2008113496A1 (en) * | 2007-03-22 | 2008-09-25 | Alstom Technology Ltd. | Flue gas cooling and cleaning system |
| CN201473610U (en) * | 2009-09-10 | 2010-05-19 | 沈阳铝镁设计研究院 | System for lowering temperature of electrolysis smoke |
-
2009
- 2009-06-23 CN CN2009100121880A patent/CN101928963A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1904539A (en) * | 2006-06-05 | 2007-01-31 | 江苏双良空调设备股份有限公司 | Finned heat exchange tube and manufacturing method thereof |
| WO2008113496A1 (en) * | 2007-03-22 | 2008-09-25 | Alstom Technology Ltd. | Flue gas cooling and cleaning system |
| CN101226032A (en) * | 2007-08-31 | 2008-07-23 | 烟台众力电力节能有限公司 | Waste steam utilization equipment |
| CN201473610U (en) * | 2009-09-10 | 2010-05-19 | 沈阳铝镁设计研究院 | System for lowering temperature of electrolysis smoke |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102200499A (en) * | 2011-04-26 | 2011-09-28 | 江苏省电力设计院 | Device for measuring temperature and humidity of flue gas in spraying equipment |
| CN102200499B (en) * | 2011-04-26 | 2012-10-10 | 江苏省电力设计院 | Device for measuring temperature and humidity of flue gas in spraying equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201473610U (en) | System for lowering temperature of electrolysis smoke | |
| CN203420834U (en) | Air cooling device and wind generating set tower cylinder with same | |
| CN202229608U (en) | Waste heat recovery system discharges fume of colliery waste rock brickyard | |
| CN204329043U (en) | Catalytic combustion bed apparatus | |
| CN208804704U (en) | A kind of boiler smoke-gas residual-heat recovering device | |
| CN201448963U (en) | Solar underground ventilation device | |
| CN108844089A (en) | A kind of boiler smoke-gas residual-heat recovering device | |
| CN101928963A (en) | System and method for reducing temperature of electrolysis flue gas | |
| CN104676621A (en) | Directly-heated type boiler | |
| CN204100835U (en) | A kind of scrap steel preheating electric furnace fume residual heat recycle device | |
| CN106638783A (en) | High-efficiency energy-saving air water production device | |
| CN104266499A (en) | Scrap steel preheating electric furnace flue gas waste heat recovery device | |
| CN104893945A (en) | Variable-frequency and constant-temperature cooler with cooling devices | |
| CN211012512U (en) | Waste heat recovery device of industrial kiln | |
| CN203657506U (en) | Kiln waste heat utilization system | |
| CN208075596U (en) | A kind of cooler for mineral hot furnace flue gas cleaning system | |
| CN203561248U (en) | Protective gas-water heat exchanger | |
| CN208124621U (en) | A kind of far infrared hot air furnace | |
| CN101655325B (en) | Temperature reduction method for hot gas and device thereof | |
| CN104946494A (en) | Variable-frequency constant-temperature cooler with heat recovery device | |
| CN201463638U (en) | Heat exchanging device for grain drying tower | |
| CN104329949A (en) | Rotary kin tail gas utilization equipment | |
| CN101792130B (en) | Hot-air blowing method for supporting insulator of electrostatic precipitator in pyrite-based sulfuric acid production | |
| CN216558337U (en) | Heat recovery system of diffusion furnace and plasma enhanced chemical vapor deposition equipment | |
| CN201242361Y (en) | Apparatus for cooling condenser air pipe |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20101229 |