CN203944225U - Anti-oxidant high temperature resistant gradient filtration felt for coal-fired boiler tail gas dedusting - Google Patents
Anti-oxidant high temperature resistant gradient filtration felt for coal-fired boiler tail gas dedusting Download PDFInfo
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- CN203944225U CN203944225U CN201420412157.0U CN201420412157U CN203944225U CN 203944225 U CN203944225 U CN 203944225U CN 201420412157 U CN201420412157 U CN 201420412157U CN 203944225 U CN203944225 U CN 203944225U
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- coal
- composite fibre
- felt
- high temperature
- tail gas
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Abstract
The utility model discloses anti-oxidant high temperature resistant gradient filtration felt for a kind of coal-fired boiler tail gas dedusting, this filter felt is that the symmetrical puncture of needing machine composite fibre layer is passed through on the two sides of intermediate layer PTFE long filament base cloth, the composite fibre layer of both sides thrusts intermediate layer PTFE long filament base cloth and mutually tangles and be formed with the filter felt of gradient-structure, is coated with the ultra-fine reticulated film of one deck on the composite fibre layer of windward side.The utility model has the advantages that heat resistance is high, oxidation resistent susceptibility good and filtering accuracy is high.
Description
Technical field
The utility model relates to the field of administering coal-fired boiler tail gas, particularly anti-oxidant high temperature resistant gradient filtration felt for a kind of coal-fired boiler tail gas dedusting.
Background technology
According to the requirement of coal-burning boiler recirculating fluidized bed flue gas ash removal, the compound dust collection method of general employing electricity bag is controlled the concentration of emission of flue gas at present, and according to the requirement of national environmental protection department, the dust emission concentration of tail gas should be controlled at 20mg/m
3below.General employing was PPS acid and alkali-resistance filter felt in the past, but according to actual conditions, owing to can produce large ozone and the nitrogen oxide of oxidation susceptibility in electric precipitation process, these gases at a certain temperature, can react with PPS acid and alkali-resistance filtrate, cause its structural damage, the indices loss of filtrate is larger, cannot meet the requirement of dedusting, require and dust emission requirement the service life that does not reach design.
Utility model content
Technical problem to be solved in the utility model is that anti-oxidant high temperature resistant gradient filtration felt for high, high temperature resistant, the oxidation resistant coal-fired boiler tail gas dedusting of a kind of filtering accuracy will be provided.
In order to solve above technical problem, the utility model provides anti-oxidant high temperature resistant gradient filtration felt for a kind of coal-fired boiler tail gas dedusting, this filter felt is that the symmetrical puncture of needing machine composite fibre layer is passed through on the two sides of intermediate layer PTFE long filament base cloth, the composite fibre layer of both sides thrusts intermediate layer PTFE long filament base cloth and mutually tangles and be formed with the filter felt of gradient-structure, is coated with the ultra-fine reticulated film of one deck on the composite fibre layer of windward side.
Between described ultra-fine reticulated film and the composite fibre layer of windward side, be provided with at least one deck adhesive layer.
Described ultra-fine reticulated film is PTFE coating layer.
The composite fibre layer of described windward side is ultra-fine PPS and PTFE fibrage, and wherein, ultra-fine PPS specification is 1.1dtex * 51mm.
The grammes per square metre of described filter felt is not less than 580 grams/square meter.
Superior effect of the present utility model is:
1) heat resistance is high: in fibrous face layer, added the PTFE fiber of resistance to 250 ℃ of high temperature, and base cloth adopted the PTFE long filament base cloth of resistance to 250 ℃ of high temperature, normal serviceability temperature is at 165 degree, and moment is 200 degree, can adapt to applied at elevated temperature occasion;
2) oxidation resistent susceptibility is good: because PTFE fiber and PTFE long filament base cloth have good oxidation resistent susceptibility, and the post processing of filtrate is that PTFE processes, and this oxidation resistent susceptibility has obtained good raising;
3) filtering accuracy is high, running resistance is little: filter felt surface has formed the reticular membrane being comprised of PTFE, make filter felt smooth surface and closely knit, the filter felt of gradient-structure has reached the effect that surface filtration adds repeatedly in-depth filtration, dust and flue gas etc. stick in the fibre structure of gradient, have increased the filter effect of filtrate;
4) reduced the running resistance of filtrate and whole cleaner, in the situation that filtration load is no more than 1.1m/min, initial resistance≤200Pa; Use 1 year internal resistance≤750Pa; Use resistance≤1200Pa after a year; Resistance≤1500Pa while using 4 years, the concentration of emission of dust is lower than 20mg/m
3;
5) use the coal-burning boiler tail flue gas dust removal life-span can reach 4 years, more than 30000 hours, and concentration of emission is lower than 20mg/m
3, can guarantee the emission matching standard of dust in length of life.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model cross section;
Fig. 2 is the utility model performance parameter table;
Number in the figure explanation
1-ultra-fine reticulated film; 2-adhesive layer;
3-PTFE long filament base cloth; 4-superfine fibre layer;
5-composite fibre layer.
The specific embodiment
Refer to shown in accompanying drawing, the utility model will be further described.
As shown in Figure 1, the utility model provides anti-oxidant high temperature resistant gradient filtration felt for a kind of coal-fired boiler tail gas dedusting, this filter felt is that the symmetrical puncture of needing machine composite fibre layer is passed through on the two sides of intermediate layer PTFE long filament base cloth, the composite fibre layer of both sides thrusts intermediate layer PTFE long filament base cloth and mutually tangles and be formed with the filter felt of gradient-structure, is coated with the ultra-fine reticulated film of one deck on the composite fibre layer of windward side.
Between described ultra-fine reticulated film and the composite fibre layer of windward side, be provided with at least one deck adhesive layer.
Described ultra-fine reticulated film is PTFE coating layer.
The composite fibre layer of described windward side is ultra-fine PPS and PTFE fibrage, and wherein, ultra-fine PPS specification is 1.1dtex * 51mm.
In order to ensure dust emission lower than 20mg/m
3requirement, the grammes per square metre of filter felt is>=580 grams/square meter, and filtering accuracy is further improved.
The utility model is dropped into coal-fired plant boiler afterbody master gas, and result of use is as follows:
1) running resistance is lower than 1500pa, generally at 1200pa;
2) required energy consumption is lower;
3) life-span long, be not less than 30000 hours running time;
4) filtering accuracy is high, and concentration of emission is lower than 20mg/m3.
Performance indications of the present utility model as shown in Figure 2, reach 30000 hours service life, and filtering accuracy reach 99.999%.
Finally be necessary described herein: above embodiment, only for the technical solution of the utility model is described in more detail, can not be interpreted as the restriction to the utility model protection domain; Some nonessential improvement that those skilled in the art makes according to foregoing of the present utility model and adjustment all belong to protection domain of the present utility model.
Claims (4)
1. an anti-oxidant high temperature resistant gradient filtration felt for coal-fired boiler tail gas dedusting, it is characterized in that: this filter felt is that the symmetrical puncture of needing machine composite fibre layer is passed through on the two sides of intermediate layer PTFE long filament base cloth, the composite fibre layer of both sides thrusts intermediate layer PTFE long filament base cloth and mutually tangles and be formed with the filter felt of gradient-structure, is coated with the ultra-fine reticulated film of one deck on the composite fibre layer of windward side.
2. anti-oxidant high temperature resistant gradient filtration felt for coal-fired boiler tail gas dedusting according to claim 1, is characterized in that: between described ultra-fine reticulated film and the composite fibre layer of windward side, be provided with at least one deck adhesive layer.
3. anti-oxidant high temperature resistant gradient filtration felt for coal-fired boiler tail gas dedusting according to claim 1, is characterized in that: the composite fibre layer of described windward side is ultra-fine PPS and PTFE fibrage, and wherein, ultra-fine PPS specification is 1.1dtex * 51mm.
4. anti-oxidant high temperature resistant gradient filtration felt for coal-fired boiler tail gas dedusting according to claim 1, is characterized in that: the grammes per square metre of described filter felt is not less than 580 grams/square meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420412157.0U CN203944225U (en) | 2014-07-24 | 2014-07-24 | Anti-oxidant high temperature resistant gradient filtration felt for coal-fired boiler tail gas dedusting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420412157.0U CN203944225U (en) | 2014-07-24 | 2014-07-24 | Anti-oxidant high temperature resistant gradient filtration felt for coal-fired boiler tail gas dedusting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203944225U true CN203944225U (en) | 2014-11-19 |
Family
ID=51886287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420412157.0U Expired - Fee Related CN203944225U (en) | 2014-07-24 | 2014-07-24 | Anti-oxidant high temperature resistant gradient filtration felt for coal-fired boiler tail gas dedusting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203944225U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111714977A (en) * | 2020-06-18 | 2020-09-29 | 安徽中电环保材料股份有限公司 | Polyester fiber filter bag and processing equipment thereof |
-
2014
- 2014-07-24 CN CN201420412157.0U patent/CN203944225U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111714977A (en) * | 2020-06-18 | 2020-09-29 | 安徽中电环保材料股份有限公司 | Polyester fiber filter bag and processing equipment thereof |
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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: 20141119 Termination date: 20190724 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |