CN101279812A - Circular press dewatering method - Google Patents
Circular press dewatering method Download PDFInfo
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- CN101279812A CN101279812A CNA2008100616639A CN200810061663A CN101279812A CN 101279812 A CN101279812 A CN 101279812A CN A2008100616639 A CNA2008100616639 A CN A2008100616639A CN 200810061663 A CN200810061663 A CN 200810061663A CN 101279812 A CN101279812 A CN 101279812A
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- press dewatering
- band
- dehydration
- transition band
- unloader knife
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Abstract
The invention discloses a circulating compression dehydration method applied to the dewatering treatment of rarefied sludge. The dehydration method dehydrates partial dehydrating materials by means of circulating compression and utilizes the dehydrated materials to adjust the water content of materials without dehydration and improve the dehydration environment, an unloader knife with a dentate gap is arranged beside an upper filtering belt at the discharging part of a compression dehydration area, the gap face of the unloader knife contacts with the upper filtering belt, when the upper filtering belt and a lower filtering belt wrapped with dehydrating materials are rotated to the discharging part of the compression dehydration area under the driving of a driving unit of a compression dehydration device, partial dehydrating materials under the upper filtering belt are scraped away through the unloader knife with the dentate gap, and a concave-convex material layer stayed on the surface of the upper filtering belt enters into the next compression dehydration following the circulation of the upper filtering belt. The dehydration method overcomes the defects of the prior art without changing the properties of materials themselves, and adjusts the water content and improves the dehydration environment of the materials through the circulating compression dehydration of partial materials, thereby effectively reducing the sludge flow and increasing the material dehydration dryness and output.
Description
Technical field
The present invention relates to a kind of solid-liquid separating method, particularly a kind of circular press dewatering method that is applicable to the thin class mud of processed.
Background technology
The prior art press dewatering method is to carry out mechanical expression dehydration in the press dewatering district of press dewatering equipment, wraps the dehydrated material in upper and lower two transition bands outside being wound in press dewatering district squeeze roll, is subjected to the squeezing of squeeze roll and transition band and dewaters.Disclose in the Chinese patent application 200710068654.8 " a kind of solid-liquid separating method and equipment " a kind of employing independently transition band carry out the above squeezing of two-stage or the two-stage pressure method of continuous band press dewatering from low to high.Adopt the method for classification press dewatering, the solid-liquid separation efficiency height, the solid content of final dewatering material can be brought up to more than 40%, reaches the semicure level.Yet, this method is to adopt the high-pressure compressing dehydration method, when being used to handle the thin material of moisture content height, quality, material is serious to the race mud phenomenon on transition band both sides in the expressing process, make the inventory that enters the press dewatering district reduce, cause processed output to descend, influence dewatering efficiency.The thin more race mud of material phenomenon is serious more.
Summary of the invention
Technical problem to be solved by this invention is, overcomes the defective that prior art exists, and a kind of character of material that do not change own is provided, and by improving the material dewatering environment, effectively reduces the circular press dewatering method that runs mud, improves material dewatering mass dryness fraction and output.
The present invention addresses the above problem the technical scheme that is adopted: this circular press dewatering method, dehydrated material carries out the mechanical expression dehydration in the press dewatering district of press dewatering equipment, wrap outside being wound in press dewatering district squeeze roll on, dehydrated material in following two transition bands, be subjected to the press dewatering of squeeze roll and transition band, be characterized in: described press dewatering method is with partial dehydration material circular press dewatering, utilize material moisture and the improvement dehydration environment of dehydrated material adjusting without dehydration, the other unloader knife that band dentation breach is housed of transition band in described press dewatering district's discharging place, the breach face of this unloader knife contacts with last transition band, when wrap dehydrated material on, following transition band drives discharging place that forwards the press dewatering district to by the drive unit of press dewatering equipment, the dehydrated material that to go up under the transition band by the unloader knife of band dentation breach partly scrapes, and stays the concavo-convex material bed of transition band surface and enters the next round press dewatering with last transition band circulation.The circular press dewatering of material changes the water ratio of thin material, improves the dehydration environment, can effectively reduce the race mud in the press dewatering process.
The described press dewatering of circular press dewatering method of the present invention is taked the subregion press dewatering method, described press dewatering is taked the subregion press dewatering method, described subregion press dewatering method adopts independently, and transition band carries out two-stage or the above press dewatering continuously of two-stage, the discharging of prime squeezing faces toward the charging of follow-up squeezing respectively, the other unloader knife that band dentation breach all is housed of the last transition band of discharging place of each grade squeezing, the unloader knife of the band dentation breach by separately partly scrapes the dehydrated material under the last transition band of correspondence, stays the concavo-convex material bed of transition band surface and enters the next round press dewatering of this grade squeezing with last transition band circulation.The subregion press dewatering is beneficial to the raising squeeze pressure, improves the solid content of dehydrated material.
The dentation breach of the unloader knife of the described band dentation of circular press dewatering method of the present invention breach is square or trapezoidal or trilateral, after the unloader knife discharging by band dentation breach, concavo-convex material bed protruding corresponding being square or trapezoidal or trilateral of staying the transition band surface.Can select the dentation breach according to the characteristic of material handling.
The equidistant arrangement of dentation breach of the unloader knife of the described band dentation of circular press dewatering method of the present invention breach, after the unloader knife discharging by band dentation breach, the concavo-convex material bed protruding equidistant arrangement of staying the transition band surface.
Apart from not waiting, after the unloader knife discharging by band dentation breach, stay that distance does not wait between the concavo-convex material bed projection on transition band surface between the dentation breach of the unloader knife of the described band dentation of circular press dewatering method of the present invention breach.The projection that stays according to needs on the last transition band requires the dentation breach of design unloader knife to arrange.
The present invention compared with prior art has the following advantages: circular press dewatering makes the last transition band of press dewatering equipment keep concavo-convex material bed of one deck all the time, last transition band surface concavo-convex material bed has three effects, the one,, similar the applicant is provided with the effect of boss or groove on squeeze roll roll body surface in Chinese patent application 200810059637.2 " a kind of belt filter-press dehydration technique and equipment ", prevent that dehydrated material is at the dehydration mud that goes back and forth between two places during pressurized; The 2nd,, the concavo-convex material bed moisture that can absorb wet stock that this mass dryness fraction is higher changes the higher water ratio of thin material, the material mass dryness fraction after the raising dehydration discharging; The 3rd,, what keep on the last transition band is material bed by the filter-press dehydration that circulates repeatedly, and bossing material mass dryness fraction height, hardness are also high, when press dewatering squeeze roll are played a supporting role, make things convenient for wet stock to enter the press dewatering district smoothly, guarantee dehydration discharging output.The present invention adopts the method for circular press dewatering, utilizes moisture difference before and after the material dewatering to regulate the water ratio of material, improves the material dewatering environment, has greatly improved press dewatering effect and output, and is economical, reasonable, practical.
Description of drawings
Fig. 1 is a circular press dewatering method embodiment unloader knife scheme of installation of the present invention.
Fig. 2 is the unloader knife dentation breach structural representation of embodiment band dentation breach.
Fig. 3 is the concavo-convex material bed synoptic diagram that transition band keeps on the embodiment.
Embodiment
Below by embodiment, the invention will be further elaborated in conjunction with the accompanying drawings.
Embodiment:
This circular press dewatering method is a kind of mechanical expression dewatering, and dehydrated material wraps in upper and lower two transition bands outside being wound in press dewatering district squeeze roll in the press dewatering district of press dewatering equipment, is subjected to squeeze roll and transition band press dewatering.This press dewatering method carries out circular press dewatering with the partial dehydration material, utilizes dehydrated material to regulate without the material moisture of dehydration and improves the dehydration environment, solves the race mud problem of prior art, improves press dewatering effect and output.Adopt discharging place in the press dewatering district of circular press dewatering method of the present invention that two unloader knives are housed, wherein one the unloader knife for band dentation breach, this unloader knife is contained in by the transition band, the breach face of unloader knife contacts with last transition band, when wrap dehydrated material on, following transition band drives discharging place that forwards the press dewatering district to by the drive unit of press dewatering equipment, the dehydrated material that to go up under the transition band by the unloader knife of band dentation breach partly scrapes, and stays the concavo-convex material bed of transition band surface and enters the next round press dewatering with last transition band circulation.
Referring to Fig. 1, the present embodiment press dewatering is the subregion press dewatering method, adopting independently, transition band carries out two-stage or the above press dewatering continuously of two-stage, the discharging of prime squeezing faces toward the charging of follow-up squeezing respectively, the other unloader knife that band dentation breach all is housed of the last transition band of discharging place of each grade squeezing, unloader knife by separately partly scrapes the dehydrated material under the last transition band of correspondence, stays the concavo-convex material bed of transition band surface and enters the next round press dewatering of this grade squeezing with last transition band circulation.Be illustrated as the two-stage press dewatering, the discharging of low pressure squeezing is facing to the charging of high-pressure compressing, the discharging place 1# live roll 2 of low pressure squeezing and 1# carrying roller 3 other 12# unloader knife 12 and the 11# unloader knives 4 adorned respectively, 11# unloader knife 4 is the unloader knife of band dentation breach as shown in Figure 2, the breach face of 11# unloader knife 4 is gone up transition band 1 with 1# and is contacted, and the edge of a knife face of 12# unloader knife 12 contacts with transition band 14 under the 1#; The 2# live roll 9 of the discharging place b of high-pressure compressing and 2# carrying roller 9 other 22# unloader knife 8 and the 21# unloader knives 7 adorned respectively, 21# unloader knife 7 is the unloader knife of band dentation breach as shown in Figure 2, the breach face of 21# unloader knife 7 is gone up transition band 5 with 2# and is contacted, and the edge of a knife face of 22# unloader knife 8 contacts with transition band 11 under the 2#.The material that present embodiment is handled is a domestic sludge, after entering from opening for feed a, mud by 12# unloader knife 12 mud on the transition band under the 1# 14 is all scraped under the 2# of high-pressure compressing on the transition band 11 through low pressure squeezing back, mud under the last transition band 1 of 1# is scraped by 11# unloader knife 4 parts under the 2# of high-pressure compressing on the transition band 11, as shown in Figure 3 concavo-convex material bed that stays on the last transition band 1 of 1# carries out the low pressure press dewatering once more along with 1# goes up transition band 1 circulation.Equally, mud under the 2# of high-pressure compressing discharging place on the transition band 11 is all scraped discharging by 22# unloader knife 8, mud under the last transition band 5 of 2# is scraped discharging by 21# unloader knife 7 parts, as shown in Figure 3 concavo-convex material bed that stays on the last transition band 5 of 2# is along with 2# goes up the dehydration of transition band 5 circulations carrying out once more high-pressure compressing.Stay last transition band 1 of 1# and 2# and go up the concavo-convex material bed of transition band 5 surfaces, can regulate the material water ratio that enters squeezings at different levels, improve the material dewatering environment, work preventing to run mud, improve the effect of press dewatering effect and output.Among Fig. 1,13 is the low pressure squeeze roll, and 10 is the high-pressure compressing roller; Among Fig. 2,15 is unloader knife dentation breach; Among Fig. 3,16 is concavo-convex material bed.
The dentation breach of the unloader knife of band dentation breach of the present invention is selected according to the characteristic of material handling, can be square or trapezoidal or trilateral, after making the unloader knife discharging by band dentation breach, the concavo-convex material bed projection of staying the transition band surface should be square or trapezoidal or trilateral mutually.Present embodiment 11# unloader knife 4 and 21# unloader knife 7 are all selected square as shown in Figure 2 breach.The projection that stays according to needs on the last transition band requires the dentation breach of the unloader knife of design band dentation breach to arrange, it can be equidistant arrangement, it also can be not equidistant arrangement, like this after the unloader knife discharging by band dentation breach, staying the concavo-convex material bed protruding corresponding of transition band surface is equidistant or not equidistant arrangement.Present embodiment 11# unloader knife 4 and 21# unloader knife 7 all adopt equidistant arrangement design as shown in Figure 2.The width of unloader knife and transition band width are complementary.
Other structure of unloader knife of the present invention and use are installed and are all adopted industry known technology.
Claims (5)
1, a kind of circular press dewatering method, dehydrated material carries out the mechanical expression dehydration in the press dewatering district of press dewatering equipment, wrap outside being wound in press dewatering district squeeze roll on, dehydrated material in following two transition bands, be subjected to the press dewatering of squeeze roll and transition band, it is characterized in that: described press dewatering method is with partial dehydration material circular press dewatering, utilize material moisture and the improvement dehydration environment of dehydrated material adjusting without dehydration, the other unloader knife that band dentation breach is housed of transition band in described press dewatering district's discharging place, the breach face of this unloader knife contacts with last transition band, when wrap dehydrated material on, following transition band drives discharging place that forwards the press dewatering district to by the drive unit of press dewatering equipment, the dehydrated material that to go up under the transition band by the unloader knife of band dentation breach partly scrapes, and stays the concavo-convex material bed of transition band surface and enters the next round press dewatering with last transition band circulation.
2, circular press dewatering method according to claim 1, it is characterized in that: described press dewatering is taked the subregion press dewatering method, described subregion press dewatering method adopts independently, and transition band carries out two-stage or the above press dewatering continuously of two-stage, the discharging of prime squeezing faces toward the charging of follow-up squeezing respectively, the other unloader knife that band dentation breach all is housed of the last transition band of discharging place of each grade squeezing, the unloader knife of the band dentation breach by separately partly scrapes the dehydrated material under the last transition band of correspondence, stays the concavo-convex material bed of transition band surface and enters the next round press dewatering of this grade squeezing with last transition band circulation.
3, circular press dewatering method according to claim 1 and 2, it is characterized in that: the dentation breach of the unloader knife of described band dentation breach is square or trapezoidal or trilateral, after the unloader knife discharging by band dentation breach, concavo-convex material bed protruding corresponding being square or trapezoidal or trilateral of staying the transition band surface.
4, circular press dewatering method according to claim 3, it is characterized in that: the equidistant arrangement of dentation breach of the unloader knife of described band dentation breach, after the unloader knife discharging by band dentation breach, the concavo-convex material bed protruding equidistant arrangement of staying the transition band surface.
5, circular press dewatering method according to claim 3, it is characterized in that: distance does not wait between the dentation breach of the unloader knife of described band dentation breach, after the unloader knife discharging by band dentation breach, stay that distance does not wait between the concavo-convex material bed projection on transition band surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100616639A CN101279812B (en) | 2008-05-21 | 2008-05-21 | Circular press dewatering method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100616639A CN101279812B (en) | 2008-05-21 | 2008-05-21 | Circular press dewatering method |
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| Publication Number | Publication Date |
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| CN101279812A true CN101279812A (en) | 2008-10-08 |
| CN101279812B CN101279812B (en) | 2010-06-02 |
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| CN2008100616639A Active CN101279812B (en) | 2008-05-21 | 2008-05-21 | Circular press dewatering method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102701562A (en) * | 2012-06-13 | 2012-10-03 | 广西来宾市天仁生物有机肥有限责任公司 | Belt-type household garbage sludge dewatering machine |
| CN110540351A (en) * | 2019-08-18 | 2019-12-06 | 山东鹤见红旗环境科技有限公司 | sludge dewatering machine |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2844716C2 (en) * | 1978-10-13 | 1985-01-31 | Albert 6680 Neunkirchen Bähr | Pre-drainage device for draining sludge and similar substances |
| CH666626A5 (en) * | 1985-03-26 | 1988-08-15 | Bucher Guyer Ag Masch | Endless belt filter press - with elastic scraper plates contacting belt on return pulley |
| CN2916536Y (en) * | 2006-02-28 | 2007-06-27 | 胡杭虎 | Belt-type filter press |
| CN100558440C (en) * | 2007-05-18 | 2009-11-11 | 华章电气（桐乡）有限公司 | A kind of solid-liquid separating method and equipment |
| CN201061738Y (en) * | 2007-05-18 | 2008-05-21 | 华章电气（桐乡）有限公司 | Solid-liquid separation equipment |
-
2008
- 2008-05-21 CN CN2008100616639A patent/CN101279812B/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102701562A (en) * | 2012-06-13 | 2012-10-03 | 广西来宾市天仁生物有机肥有限责任公司 | Belt-type household garbage sludge dewatering machine |
| CN110540351A (en) * | 2019-08-18 | 2019-12-06 | 山东鹤见红旗环境科技有限公司 | sludge dewatering machine |
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| CN101279812B (en) | 2010-06-02 |
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Denomination of invention: Circular press dewatering method Effective date of registration: 20180802 Granted publication date: 20100602 Pledgee: Bank of Hangzhou Limited by Share Ltd Tongxiang branch Pledgor: Zhejiang Huazhang Technology Co., Ltd. Registration number: 2018330000216 |