CN202070270U - Tail gas dust-removing device for alumina circulation roasting furnace - Google Patents
Tail gas dust-removing device for alumina circulation roasting furnace Download PDFInfo
- Publication number
- CN202070270U CN202070270U CN 201120029704 CN201120029704U CN202070270U CN 202070270 U CN202070270 U CN 202070270U CN 201120029704 CN201120029704 CN 201120029704 CN 201120029704 U CN201120029704 U CN 201120029704U CN 202070270 U CN202070270 U CN 202070270U
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- dust
- removing device
- tail gas
- roasting furnace
- gas dust
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Abstract
The utility model relates to a tail gas dust-removing device for an alumina circulation roasting furnace. The tail gas dust-removing device comprises an electric dust collector connected with a smoke discharge pipe. The dust-removing device is also provided with a bag dust remover connected in series with the electric dust collector, and a filter bag of the bag dust remover is made of high-temperature-resistant permeable membrane composite filter needled felt. The high-temperature-resistant permeable membrane composite filter needled felt is provided with a polyimide surface layer or a polytetrafluoroethylene surface layer. The electric dust collector runs with half power or low power. The tail gas dust-removing device for the alumina circulation roasting furnace has the following advantages: the filter bag is made of high-temperature-resistant permeable membrane composite filter needled felt, so that the tail gas dust-removing device can resist corrosion, dust on the surface can easily be peeled off, and the filtering precision is high due to the pore structure on the surface; and moisture condensation resistance and chemical resistance are improved, and the surface can resist flames, etc. The gas dust-removing device for the alumina circulation roasting furnace can well applied to the tail gas dust removal for the alumina circulation roasting furnace.
Description
[technical field]
The utility model relates to a kind of aluminium oxide circulating roaster tails dedusting device.
[background technology]
What the aluminium oxide calcining treating tail gas used at present all is electric cleaner.The operation principle of electric cleaner is a flue gas when passing through flue before the electric cleaner agent structure, makes its flue dust positively charged, and flue gas enters the electric cleaner passage that the multilayer cathode plate is set then.Because the mutual suction-operated of positively charged flue dust and negative electrode electroplax, particle flue dust in the flue gas is adsorbed on the negative electrode, regularly hit minus plate, make to have in the ash bucket of certain thickness flue dust below the double action drop of conducting oneself with dignity and vibrating drops on the electric cleaner structure, thereby reach the purpose of removing the flue dust in the flue gas.
The characteristics of the efficiency of dust collection of electric cleaner and the structural shape of electric field, electric supply installation etc. are relevant, and are bigger with the character relation of flue gas and dust.As the composition of flue gas and dust, temperature, humidity, concentration, granularity and than resistance etc.Wherein the influence of the ratio resistance of dust is the most outstanding: when dust is constantly long-pending thick, dust layer produces a highfield, this electric field has not only weakened interelectrode electric-field intensity, repelling other dust continues to move to dust collector pole, can between the dust layer space partial breakdown take place also, produce the anion neutralization in a large amount of cations and the electric field, consequently corona current increases.Voltage reduces, and flashover is frequent in the electric field, and the secondary fly-up of dust is serious, and Here it is so-called back corona phenomenon can cause the electricity consumption power consumption to increase, and dust removal performance worsens, even can't work.
If boiler fuel flow increases, exhaust gas temperature raises, dust contained flue gas concentration increases, the operating condition of electric cleaner will worsen, and efficiency of dust collection is reduced.When the long-time underrun of boiler, be smooth combustion, necessary input heavy oil or diesel oil are combustion-supporting, cause the dope in flue-gas temperature and the flue gas to increase.These dopes cause the cathode line hypertrophy, and the positive plate dust stratification causes the efficiency of dust collection of electric field to descend.If steam is revealed in the boiler, to increase smoke moisture, though at utmost point short time internal cause flue gas by modified and reduced coal ash and compared resistance, efficiency of dust collection can raise, but the time is long slightly, and electric cleaner is with serious dust stratification, especially when amount of leakage is big, pole plate even fouling, the service life that can reduce deduster.
If variation has taken place the boiler combustion coal, its calorific value is low than design coal, and ash content then can strengthen the wearing and tearing to defeated coal, powder process, dedusting, defeated grey equipment than the design coal height, shortens the time between overhauls(TBO) of equipment.Use low heat value fire coal can make the actual Coal-fired capacity of boiler increase, and the dust burdening of flue gas is increased.Can make electric cleaner smoke treatment dust content surpass design load like this, efficiency of dust collection will be had a strong impact on.
In sum, the efficiency of dust collection of cottrell is difficult to lifting owing to be subjected to the extraneous factor restriction, and current environmental emission standard is brought up to≤30mg/m
3, only rely on cottrell not reach environmental requirement.And industrial smoke dedusting sack cleaner commonly used is because the aluminium oxide circulating roaster is to contain a certain amount of SO in its composition
2, work as SO
2When dewfall, will corrode the metal shell of filter bag and equipment, therefore still sack cleaner is not applied at present the precedent of aluminium oxide calcining dust collecting process at home.
[utility model content]
Technical problem to be solved in the utility model is to provide a kind of dust removing effects to reach existing environmental protection standard and resistive connection reveals, corrosion resistant aluminium oxide circulating roaster tails dedusting device.
The technical solution of the utility model is: aluminium oxide circulating roaster tails dedusting device, comprise a cottrell that is connected with smoke exhaust pipe, described dust arrester does not also have a sack cleaner of connecting with described cottrell, and the filter bag of described sack cleaner adopts the high temperature resistant film composite acupuncture filter felt that oozes to make.
As the further improvement of such scheme, the high temperature resistant film composite acupuncture filter felt that oozes is high temperature resistant film combined filtration felt or the high temperature resistant film combined filtration felt that oozes of polytetrafluoroethylene (PTFE) surface layer of oozing of polyimides surface layer.
Advantage of the present utility model is: the high temperature resistant film that oozes meets the needled filtering felt surface and has the polyimide fiber layer or scribble one deck polytetrafluoroethylene (PTFE), and to ooze the filter bag that film composite acupuncture filter felt makes corrosion-resistant by high temperature resistant, and the dust on surface easily peels off; There is microcellular structure on the surface, the filtering accuracy height; Resistive connection reveals, chemical-resistance strengthens; And the anti-naked light in surface, anti-Mars can be advantageously applied in the tails dedusting of aluminium oxide circulating roaster.
[description of drawings]
The utility model will be further described in conjunction with the embodiments with reference to the accompanying drawings.
Fig. 1 is the structural representation of an embodiment of the utility model,
Fig. 2 is the structural representation of another embodiment of the utility model.
[specific embodiment]
Embodiment 1: referring to Fig. 1, aluminium oxide circulating roaster tails dedusting device, comprise a cottrell that is connected with smoke exhaust pipe 1, dust arrester also is provided with a sack cleaner 2 of connecting with cottrell 1, the filter bag 4 of sack cleaner 2 adopts the high temperature resistant film composite acupuncture filter felt that oozes to make, and high temperature resistant what ooze that film composite acupuncture filter felt adopts is high temperature resistant film combined filtration felt or the high temperature resistant film combined filtration felt that oozes of polytetrafluoroethylene (PTFE) surface layer of oozing of polyimides surface layer.Cottrell 1 is taked the half-power method of operation or is adopted the low-power cottrell, take the full power operation or adopt large-sized cottrell if its reason is a cottrell 1, the smoke dust content that is transported to sack cleaner 2 so is low excessively, can cause sack cleaner 2 gas leakage, thereby negative pressure is bad when causing driving, influences the efficiency of dust collection of whole device.
Among Fig. 1, be provided with bypass valve 3 in the bypass duct of sack cleaner 2, the below of filter bag 4 is chain making machines 6, and the exhaust opening of sack cleaner 2 links to each other with chimney by air exhauster 5, and at this moment, sack cleaner 2 carries out dedusting under negative pressure.
Embodiment 2: referring to Fig. 2, the sack cleaner 2 among Fig. 2 is directly by smoke pipe and the outside exhaust of chimney, and at this moment, sack cleaner 2 carries out dedusting under positive pressure.Link to each other or the high temperature resistant film combined filtration felt that oozes of polytetrafluoroethylene (PTFE) surface layer.Remainder is identical with embodiment 1.
Although illustrated and described embodiment of the present utility model, for the ordinary skill in the art, be appreciated that under the situation that does not break away from principle of the present utility model and spirit and can carry out multiple variation, modification, replacement and modification to these embodiment, scope of the present utility model is limited by claims and equivalent thereof.
Claims (3)
1. aluminium oxide circulating roaster tails dedusting device, comprise a cottrell that is connected with smoke exhaust pipe, it is characterized in that: described dust arrester also is provided with a sack cleaner of connecting with described cottrell, and the filter bag of described sack cleaner adopts the high temperature resistant film composite acupuncture filter felt that oozes to make.
2. according to the described aluminium oxide circulating roaster of claim 1 tails dedusting device, it is characterized in that: the described high temperature resistant film composite acupuncture filter felt that oozes is high temperature resistant film combined filtration felt or the high temperature resistant film combined filtration felt that oozes of polytetrafluoroethylene (PTFE) surface layer of oozing of polyimides surface layer.
3. according to the described aluminium oxide circulating roaster of claim 1 tails dedusting device, it is characterized in that: described cottrell adopts the low-power cottrell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120029704 CN202070270U (en) | 2011-01-28 | 2011-01-28 | Tail gas dust-removing device for alumina circulation roasting furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120029704 CN202070270U (en) | 2011-01-28 | 2011-01-28 | Tail gas dust-removing device for alumina circulation roasting furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202070270U true CN202070270U (en) | 2011-12-14 |
Family
ID=45108386
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120029704 Expired - Fee Related CN202070270U (en) | 2011-01-28 | 2011-01-28 | Tail gas dust-removing device for alumina circulation roasting furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202070270U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102743946A (en) * | 2012-07-10 | 2012-10-24 | 中国铝业股份有限公司 | Alumina calcination dust collecting system |
| CN105797527A (en) * | 2016-05-18 | 2016-07-27 | 山东电力建设第工程公司 | Device for preventing induced draft fan from being abraded in oil-coal co-combustion stage and operation method thereof |
| CN106621677A (en) * | 2017-02-23 | 2017-05-10 | 贾海亮 | Efficient combined dust collector |
| CN110094986A (en) * | 2018-01-31 | 2019-08-06 | 沈阳铝镁设计研究院有限公司 | Reduce the device of aluminum oxide roasting furnace flue gas dust concentration |
-
2011
- 2011-01-28 CN CN 201120029704 patent/CN202070270U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102743946A (en) * | 2012-07-10 | 2012-10-24 | 中国铝业股份有限公司 | Alumina calcination dust collecting system |
| CN102743946B (en) * | 2012-07-10 | 2015-03-11 | 中国铝业股份有限公司 | Alumina calcination dust collecting system |
| CN105797527A (en) * | 2016-05-18 | 2016-07-27 | 山东电力建设第工程公司 | Device for preventing induced draft fan from being abraded in oil-coal co-combustion stage and operation method thereof |
| CN106621677A (en) * | 2017-02-23 | 2017-05-10 | 贾海亮 | Efficient combined dust collector |
| CN110094986A (en) * | 2018-01-31 | 2019-08-06 | 沈阳铝镁设计研究院有限公司 | Reduce the device of aluminum oxide roasting furnace flue gas dust concentration |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20111214 Termination date: 20160128 |
|
| EXPY | Termination of patent right or utility model |