CN2196636Y - Air-cushion type washing and sizing tower - Google Patents
Air-cushion type washing and sizing tower Download PDFInfo
- Publication number
- CN2196636Y CN2196636Y CN 94216771 CN94216771U CN2196636Y CN 2196636 Y CN2196636 Y CN 2196636Y CN 94216771 CN94216771 CN 94216771 CN 94216771 U CN94216771 U CN 94216771U CN 2196636 Y CN2196636 Y CN 2196636Y
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- China
- Prior art keywords
- pulp
- tower
- black liquor
- air
- accompanying
- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to a washing machine for pulp in a pulp mill, mainly formed by that a tower body, a strainer and support grids are combined. The utility model is mainly used for the pulp mill which produces 10-100 tons of pulp everyday. After the pulp with a large quantity of steaming waste liquor (black liquor) is washed by the tower, both the extraction rate of the black liquor and the concentration of the extracted black liquor are enhanced by leaps and bounds, so the benefits of economy and environment in the recovery of papermaking alkali are improved. After the pulp is washed by the tower, the extraction rate of the black liquor is predicted to reach about 95-98%, and the concentration of the extracted black liquor can reach about Be'(15DEG. C) 10.
Description
The invention relates to the washing device of pulp mill's slurry.
(be commonly called as black liquor) in the slurry waste liquid of pulp mill and contain large amount of organic and inorganic matter (NaOH and Na
2S), must wash slurry, be mingled in organic matter in the slurry waste liquid and inorganic matter as far as possible all or the overwhelming majority extract.The recovery rate of black liquor and the black liquid consistency of extraction thereof are high more, and then alkali recovery is also high more, and economic benefit that alkali reclaims and environmental benefit are also just good more.
The employed washing device of large, medium and small pulp mill both domestic and external mainly contains the vacuum drum washer, horizontal belt vacuum pulp washing machine and pressure wash engine etc. at present.Except that from the pulp washing effect of the expensive pressure wash engine of external introduction better, the pulp washing effect of all the other all kinds of wash engines is not ideal, is difficult to satisfy the best requirement that alkali reclaims.From present domestic actual conditions, introduce the pressure wash engine except having only the big factory of minority to have ready conditions, most factories still adopt traditional common washing device.In general these traditional washing devices, its extraction rate of black liquor is about about 60～85%, and the black liquid consistency of extraction is about Be ' (15 ℃) about 6～8.5.
The purpose of the invention provides a kind of air-cushion type efficiently pulp washing tower to 10～100 ton per day pulp mills, and it is except that can be used as the washing device use, and also the double as slurry spurt the tower use simultaneously.
Slurry enters in the tower from top of tower, thin up is behind finite concentration, just feed low-pressure air, and make and remain certain pressure in the tower, black liquor in the slurry is discharged outside the tower by opening of sieve, so through after the countercurrent washing repeatedly, in the slurry contained organic matter and inorganic matter the overwhelming majority be recovered, estimate that extraction rate of black liquor can be up to about 95～98%.Simultaneously,,, can reach Be ' (15 ℃) about 10, satisfy the high requirement of alkali recovery preferably extraction rate of black liquor and concentration so the black liquid consistency that extracts is higher because in the pulp washing process, dilution gfactor is less.Thereby the cost that alkali is reclaimed descends the bigger raising of economic and environmental benefit acquisition.From investing, the invention is wanted much less than the construction investment of vacuum pulp washing machine and pressure wash engine.
Accompanying drawing 1 is the structure schematic front view of vacuum drum washer of the prior art, and accompanying drawing 2 is vertical views of accompanying drawing 1.
The vacuum drum 2. casings 3. stripping slurry rollers of 1. band filter screens in accompanying drawing 1,2
4. liquid discharging bucket 5. is starched layer 6. slurry
7. filtrate
Accompanying drawing 3 is structure schematic front view of the horizontal belt vacuum pulp washing machine of prior art, and accompanying drawing 4 is vertical views of accompanying drawing 3.
The drive belt of 1. suction flat boxs, 2. band filter openings in accompanying drawing 3,4
3. transmission roller 4. is starched layer
Accompanying drawing 5 is structure schematic front view of the pressure wash engine of prior art, and accompanying drawing 6 is vertical views of accompanying drawing 5.
Rotary drum 3. lower casings of 1. upper casings, 2. band filter screens in accompanying drawing 5,6
4. stripping slurry roller 5. liquid discharging buckets 6. are starched layer
7. low-pressure air 8. slurries 9. filtrates
Accompanying drawing 7 is structure schematic front view of the air-cushion type pulp washing tower of the invention, and accompanying drawing 8 is vertical views of accompanying drawing 7.
1. tower bodies, 2. filter screens, 3. support grids in accompanying drawing 7,8
4. slurry 5. low-pressure airs 6. filtrates
Claims (1)
1, a kind of air-cushion type pulp washing tower that utilizes low-pressure air to carry out the static pressure pulp washing is characterized in that being combined by tower body (1), filter screen (2) and support grid (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94216771 CN2196636Y (en) | 1994-07-06 | 1994-07-06 | Air-cushion type washing and sizing tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94216771 CN2196636Y (en) | 1994-07-06 | 1994-07-06 | Air-cushion type washing and sizing tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2196636Y true CN2196636Y (en) | 1995-05-10 |
Family
ID=33832373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94216771 Expired - Fee Related CN2196636Y (en) | 1994-07-06 | 1994-07-06 | Air-cushion type washing and sizing tower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2196636Y (en) |
-
1994
- 1994-07-06 CN CN 94216771 patent/CN2196636Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |