CN108793676A - A kind of the composite highly effective dewatering and system of sludge - Google Patents
A kind of the composite highly effective dewatering and system of sludge Download PDFInfo
- Publication number
- CN108793676A CN108793676A CN201810415011.4A CN201810415011A CN108793676A CN 108793676 A CN108793676 A CN 108793676A CN 201810415011 A CN201810415011 A CN 201810415011A CN 108793676 A CN108793676 A CN 108793676A
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- China
- Prior art keywords
- sludge
- highly effective
- composite highly
- membranes
- vacuum
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Classifications
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/14—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
Abstract
The invention discloses a kind of composite highly effective dewaterings of sludge, sludge is handled in such a way that the rupture of membranes method of physics and vacuum dehydration are combined, not only there is higher dehydration efficiency compared with the techniques such as existing plate compression, belt press filtration or centrifugal dehydration, and without adding chemical reagent, non-secondary pollution；Because having rupture of membranes pretreatment process, dehydration efficiency higher compared with single vacuum is dehydrated；Simultaneously compared with the techniques such as pyrohydrolysis, without heating, energy consumption is relatively low, has preferable application prospect in environmental protection or municipal field.
Description
Technical field
The present invention relates to environmental protection or municipal fields, more particularly, to a kind of composite highly effective dewatering of sludge.
Background technology
The processing of sludge and the treatment technology for lagging far behind sewage itself using technology, become restriction Environmental Development
Major issue.Sludge can bring heavy economy and environmental pressure, while the sludge generated after treated sewage exists once generating
Fail final process after dehydration to 80% moisture content, just stacked temporarily in various regions refuse landfill, easily causes occupancy soil
The serious secondary environment problem such as ground, polluted surface and underground water, it is therefore desirable to which sludge is carried out dehydrating to meet environment
Requirement.
Traditional mechanical dehydration method, including plate compression, belt press filtration and centrifugal dehydration can only be by sludge dewaterings extremely
80% moisture content or so, if entering and burning by further dehydration, needing a large amount of coal dust is added just can make its suitable
The centres such as profit is burnt, that is, needs the combustion-supporting of coal, this just considerably increases the cost of Treatment of Sludge, and produces sulfide
Pollutant is unfavorable for environmental protection, therefore needs further to be dehydrated before final process.China's municipal wastewater sludge is final at present
Mainly there are two directions for whereabouts：Blended landfill and burning, the two are required for moisture content being further decreased to 60% hereinafter, other
System of such as fermenting fertilizer or brickmaking technology not yet maturation or utilization rate be not high.Although the technologies such as sludge incineration are constantly ripe, various regions are emerging
Many sludge incineration plants or desiccation factory project are built, but since sludge storage and quantity increment are huge, sludge dewatering facility still has
A large amount of notches, therefore be badly in need of that the effective dehydrating method of dewatering rate can be further increased.
Moisture in sludge is divided into four kinds, i.e. interstitial water, capillary water, surface adsorption water and internal combustion by its existence
Water, wherein internal junction Heshui is primarily present in the microbial cell in sludge, and the technical difficulty that sludge is further dehydrated
It is that the microbial bacteria micelle network generated in biochemical processing procedure of sewage plays the stabilization of water lock in sludge.This is slightly
Biological zoogloea is difficult to be mechanically destruction, and the rigid structure of microbial cell film hinders intracellular moisture in sludge
Release.If concentrating and being further dehydrated after mechanism filter-pressing, or improving dehydration efficiency, then need to break sludge
Film pre-processes.The pretreated conventional method of rupture of membranes is addition chemical reagent at present, but there are larger secondary pollutions for chemical reagent.
If the applying date is on November 11st, 2015, application No. is disclose a kind of dirt in the Chinese patent application of 201510763808.X
The technique of mud deep dehydration, using the technique of hydro-thermal reaction+flocculation conditioning+mechanical dehydration, but process need to add surfactant,
And it need to be heated to 120-160 DEG C, for relative pressure in 0.5-1.2Mpa, integrated artistic is complicated and easily causes secondary pollution.China
Patent CN101255000A, which relates generally to high-pressure pulse electric and the synergistic effect for agent of perforating, can just go to destroy the cell of microorganism
Then membrane structure reuses drying agent and condensation agent cohesion macromolecular substances, to the moisture that dissociates, in its entire technique middle arteries
It is an auxiliary to rush electric field, and also needs to add a large amount of chemical substance, equally easily causes secondary pollution.
Invention content
In view of the deficiencies of the prior art, it is de- that technical problem to be solved by the invention is to provide a kind of composite highly effectives of sludge
Water method avoids and introduces the problem of chemical reagent brings secondary pollution.
The technical solution used in the present invention is：
The present invention provides a kind of composite highly effective dewatering of sludge, includes the following steps：
(1) the rupture of membranes method of physics is used to pre-process sludge；
(2) vacuum dehydration is carried out to step (1) treated sludge.
Preferably, vacuum dehydration uses continuous feed mode, vacuum degree >=-0.09MPa in step (2).
Preferably, the rupture of membranes method of physics is mechanical rupture of membranes in step (1)
Further, the mechanical rupture of membranes is specially：Mechanical agitation is carried out after sludge is mixed with aggregate, the aggregate is
Mohs' hardness is not less than 6 material.Aggregate in the present invention refers to the material that Mohs' hardness is not less than 6, can be mixed with sludge
It closes and realizes rupture of membranes processing.It is preferred that aggregate is the material that graininess and Mohs' hardness are not less than 6.In order to improve the processing effect of sludge
The mass values that rate, preferably sludge are mixed with aggregate are not higher than 1.
Mechanical rupture of membranes realizes rupture of membranes, and then improve by the mixing of sludge and aggregate under the action of stirring in the present invention
Dehydration efficiency.
Further, the aggregate is clinker or the building waste of crushing.
Further, the material generated after vacuum dehydration in step (2) is mixed as aggregate with sludge, after return to step
(1).I.e. after step (2) dehydration obtained material can with reuse, wherein some or all of material can regard aggregate again
It is mixed with sludge, is then handled using step (1) and step (2).
Preferably, step (1) at least carries out once, i.e., sludge is after multiple rupture of membranes pretreatment, then carries out vacuum and take off
Water.
Preferably, step (1) and step (2) at least circulation primary, i.e. sludge are handled by step (1) and step (2)
Afterwards, to improve the dehydration efficiency of sludge, step (1) and (2) processing are again passed by.
The present invention also provides a kind of composite highly effective dewatering systems of sludge, including sequentially connected sludge stirring machine and vacuum
Dewaterer is connected between the sludge stirring machine and the vacuum hydroextractor by conveyer, the sludge stirring machine for pair
Sludge carries out mechanical rupture of membranes.
Preferably, the sludge stirring machine and vacuum hydroextractor are a dewatering unit, and the dewatering unit is at least one
It is a.
The beneficial effects of the invention are as follows：
The present invention provides a kind of composite highly effective dewatering for sludge, this method is pre-processed using the rupture of membranes of physics
Sludge is handled with the mode that vacuum dehydration is combined, chemical reagent need not be additionally added and high-efficient automatic dehydration can be realized,
It is reduced using the saturated vapour pressure of water under vacuum condition, moisture evaporation can be realized under conditions of without heating, is not required to volume
The outer water collector that increases can be obtained relatively dry recyclable sludge.It is de- with existing plate compression, belt press filtration or centrifugation
The techniques such as water, which are compared, not only has higher dehydration efficiency, but also without adding chemical reagent, non-secondary pollution；With single vacuum
Dehydration is compared to because have rupture of membranes pretreatment process, dehydration efficiency higher；Simultaneously compared with the techniques such as pyrohydrolysis, without heating,
Energy consumption is relatively low.The composite highly effective dewatering system of sludge provided by the invention, can realize the continuous processing of sludge, dehydration efficiency
Height is suitable for industrialized continuous operation.
Description of the drawings
Fig. 1 is the process flow chart in embodiment 1 and embodiment 2.
Specific implementation mode
The technique effect of design and the generation of the present invention is clearly and completely described below with reference to embodiment, with
It is completely understood by the purpose of the present invention, feature and effect.Obviously, described embodiment is that the part of the present invention is implemented
Example, rather than whole embodiments, based on the embodiment of the present invention, those skilled in the art is not before making the creative labor
Obtained other embodiment is put, the scope of protection of the invention is belonged to.
Embodiment 1
The present embodiment is process object with municipal sludge, provides a kind of composite highly effective dewatering of sludge, includes
Secondary mechanical rupture of membranes and vacuum dehydration.Referring to Fig. 1, technological process is as follows：The sludge that moisture content is 80% is pumped by machinery
Enter to mix feeder, as aggregate, mixed proportion is the building waste of moisture content 30% after input crushes in mixing feeder
Sludge 680kg, aggregate 670kg, gross weight 1350kg.Batch mixing is added to sludge stirring machine (level-one sludge stirring machine), by twin shaft
After stirring extruding progress first time mechanical rupture of membranes second sludge stirring machine (sludge stirring machine) progress second is sent into through conveyer belt
Secondary machinery rupture of membranes, enters back into vacuum hydroextractor and is dehydrated, and vacuum degree is -0.092MPa, batch mixing gross weight 1160kg after dehydration, is taken off
Water 190kg is 47.8% through calculating dewatered batch mixing moisture content, is 46.14% through the practical moisture content of inspection, and heavy metal contains
Figureofmerit is all qualified, and standard of landfill is fully achieved.
The sludge treating system that the present embodiment uses, including sequentially connected sludge stirring machine, sludge stirring machine and vacuum
Dewaterer is connected by conveyer between each equipment, and sludge by two sludge stirring machines after carrying out mechanical rupture of membranes, through passing
Machine is sent to be transmitted in vacuum hydroextractor, the material after vacuum dehydration, which can be filled directly, can also be used as aggregate and be added to sludge
It is recycled in blender, does not cause secondary pollution.The present embodiment in order to improve the dehydration efficiency of sludge use it is secondary
Mechanical rupture of membranes can increase or decrease the quantity of sludge stirring machine and vacuum off line according to actual demand.
The aggregate used in machinery rupture of membranes of the invention can be clinker, can also be the building waste the like waste of crushing,
Waste recycling is realized, solves the problems, such as building waste removing, while the present invention also provides one kind being directed to sludge machine
The aggregate reuse method of tool rupture of membranes, i.e., dewatered batch mixing can be recycled partly or entirely as aggregate, Jin Ertong
Step realizes that raw material recycles the target with sludge reduction.
Embodiment 2
With reference to figure 1, picks and places dewatered batch mixing 425kg in the embodiment 1 after setting one day and (steamed naturally through one day as aggregate
40%) moisture content is reduced to after hair is mixed with the sludge of 240kg moisture content 90%, gross weight 665kg, and it is mechanical twice to again pass by
Rupture of membranes and vacuum dehydration processing, batch mixing actual weight 445kg after dehydration are dehydrated 220kg, through calculating dewatered batch mixing moisture content
37%, it is 37.9% through the practical moisture content of inspection, and heavy metal content index is all qualified, and standard of landfill is fully achieved.
It is mixed again with the sludge of 695kg moisture content 90% using dewatered batch mixing 695kg as aggregate, gross weight
1390kg is sent into for the third time in secondary rupture of membranes and vacuum dewatering technique, batch mixing actual weight 1185kg after dehydration, is dehydrated 205kg,
Through calculating the dewatered practical moisture content 57% of batch mixing, with recycling for aggregate, the content of clinker is reduced in batch mixing, dehydration
Efficiency is declined, and practical aggregate can also continue to reuse 14 times, therefore preferably the mass ratio of sludge and aggregate is not higher than 1.Through
The sludge moisture content of the dewatering processing of the present invention is low, can transport outward and fill or utilize again.
Rupture of membranes pretreatment may be used by the present invention and vacuum dehydration is used in combination and the mode of circular treatment carries out sludge
Dehydration rupture of membranes pretreatment can also be unfolded simultaneously to sludge and vacuum dehydration is combined and made in batches to improve the efficiency of sludge dewatering
Sludge is dehydrated with the mode of processing, to improve the treating capacity of unit interval sludge.
Claims (10)
1. a kind of composite highly effective dewatering of sludge, which is characterized in that include the following steps：
(1) the rupture of membranes method of physics is used to pre-process sludge；
(2) vacuum dehydration is carried out to step (1) treated sludge.
2. the composite highly effective dewatering of sludge according to claim 1, which is characterized in that vacuum dehydration in step (2)
Using continuous feed mode, vacuum degree >=-0.09MPa.
3. the composite highly effective dewatering of sludge according to claim 1, which is characterized in that physics is broken in step (1)
Film method is mechanical rupture of membranes.
4. the composite highly effective dewatering of sludge according to claim 3, which is characterized in that the machinery rupture of membranes is specific
For：Mechanical agitation is carried out after sludge is mixed with aggregate, the aggregate is the material that Mohs' hardness is not less than 6.
5. the composite highly effective dewatering of sludge according to claim 4, which is characterized in that the aggregate is clinker or powder
Broken building waste.
6. the composite highly effective dewatering of sludge according to claim 4, which is characterized in that vacuum dehydration in step (2)
The material generated afterwards is mixed as aggregate with sludge, after return to step (1).
7. according to the composite highly effective dewatering of claim 1-6 any one of them sludge, which is characterized in that step (1) is extremely
It is few to carry out once.
8. according to the composite highly effective dewatering of claim 1-6 any one of them sludge, which is characterized in that step (1) and
Step (2) at least circulation primary.
9. a kind of composite highly effective dewatering system of sludge, which is characterized in that de- including sequentially connected sludge stirring machine and vacuum
Water dispenser is connected between the sludge stirring machine and the vacuum hydroextractor by conveyer, and the sludge stirring machine is used for dirt
Mud carries out mechanical rupture of membranes.
10. the composite highly effective dewatering system of sludge according to claim 9, which is characterized in that the sludge stirring machine and
Vacuum hydroextractor is a dewatering unit, and the dewatering unit is at least one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810415011.4A CN108793676A (en) | 2018-05-03 | 2018-05-03 | A kind of the composite highly effective dewatering and system of sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810415011.4A CN108793676A (en) | 2018-05-03 | 2018-05-03 | A kind of the composite highly effective dewatering and system of sludge |
Publications (1)
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| CN108793676A true CN108793676A (en) | 2018-11-13 |
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| CN201810415011.4A Pending CN108793676A (en) | 2018-05-03 | 2018-05-03 | A kind of the composite highly effective dewatering and system of sludge |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1128499A (en) * | 1997-05-16 | 1999-02-02 | Hymo Corp | Method for dehydrating sludge |
| CN102153266A (en) * | 2011-02-24 | 2011-08-17 | 韩承宏 | Method for treating sewage sludge with diatom |
| CN102557362A (en) * | 2010-12-27 | 2012-07-11 | 四川环能德美科技股份有限公司 | Residual sludge cell wall breaking system and method |
| CN204265618U (en) * | 2014-10-30 | 2015-04-15 | 四川环能德美科技股份有限公司 | Waterpower two phase flow sludge cell wall breakage system |
| CN104556620A (en) * | 2014-12-23 | 2015-04-29 | 常熟市添源环保科技有限公司 | Dehydration method of sludge |
-
2018
- 2018-05-03 CN CN201810415011.4A patent/CN108793676A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1128499A (en) * | 1997-05-16 | 1999-02-02 | Hymo Corp | Method for dehydrating sludge |
| CN102557362A (en) * | 2010-12-27 | 2012-07-11 | 四川环能德美科技股份有限公司 | Residual sludge cell wall breaking system and method |
| CN102153266A (en) * | 2011-02-24 | 2011-08-17 | 韩承宏 | Method for treating sewage sludge with diatom |
| CN204265618U (en) * | 2014-10-30 | 2015-04-15 | 四川环能德美科技股份有限公司 | Waterpower two phase flow sludge cell wall breakage system |
| CN104556620A (en) * | 2014-12-23 | 2015-04-29 | 常熟市添源环保科技有限公司 | Dehydration method of sludge |
Non-Patent Citations (3)
| Title |
|---|
| 丁启圣等: "《新型实用过滤技术（第4版）》", 31 December 2017, 冶金工业出版社 * |
| 顾莹莹等: "《废水是如何变清的 倾听地球的脉搏》", 30 April 2012, 冶金工业出版社 * |
| 高慎琴等: "《化工机器》", 31 October 1995, 化学工业出版社 * |
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Application publication date: 20181113 |
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