CN104961323B - A kind of dredging mud dewatering based on mud transdermally water - Google Patents
A kind of dredging mud dewatering based on mud transdermally water Download PDFInfo
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- CN104961323B CN104961323B CN201510391789.2A CN201510391789A CN104961323B CN 104961323 B CN104961323 B CN 104961323B CN 201510391789 A CN201510391789 A CN 201510391789A CN 104961323 B CN104961323 B CN 104961323B
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- mud
- suction filtration
- dredging
- transdermally
- water
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 238000000967 suction filtration Methods 0.000 claims abstract description 64
- 239000004746 geotextile Substances 0.000 claims abstract description 23
- 230000007704 transition Effects 0.000 claims abstract description 19
- 238000004062 sedimentation Methods 0.000 claims abstract description 11
- 230000035515 penetration Effects 0.000 claims abstract description 7
- 238000000926 separation method Methods 0.000 claims abstract description 7
- 238000003828 vacuum filtration Methods 0.000 claims description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 9
- 230000008595 infiltration Effects 0.000 claims description 8
- 238000001764 infiltration Methods 0.000 claims description 8
- 229910052742 iron Inorganic materials 0.000 claims description 8
- -1 iron ion Chemical class 0.000 claims description 8
- REDXJYDRNCIFBQ-UHFFFAOYSA-N aluminium(3+) Chemical compound [Al+3] REDXJYDRNCIFBQ-UHFFFAOYSA-N 0.000 claims description 7
- 229920002401 polyacrylamide Polymers 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 239000004743 Polypropylene Substances 0.000 claims 1
- 150000001408 amides Chemical class 0.000 claims 1
- 229920001155 polypropylene Polymers 0.000 claims 1
- 238000009738 saturating Methods 0.000 claims 1
- 230000003750 conditioning effect Effects 0.000 abstract description 7
- 230000018044 dehydration Effects 0.000 abstract description 4
- 238000006297 dehydration reaction Methods 0.000 abstract description 4
- 230000000903 blocking effect Effects 0.000 abstract description 3
- 230000002045 lasting effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 5
- 239000004744 fabric Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000005189 flocculation Methods 0.000 description 2
- 230000016615 flocculation Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000008394 flocculating agent Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Classifications
-
- 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
- C02F11/143—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents using inorganic substances
-
- 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
- C02F11/147—Treatment of sludge; Devices therefor by de-watering, drying or thickening with addition of chemical agents using organic substances
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
Abstract
The present invention relates to a kind of dredging mud dewatering based on mud transdermally water, it is comprised the following steps successively：（a）The transition mud containing floc sedimentation is formed to flocculant is added in dredging mud；（b）With geotextiles as filter medium, suction filtration is carried out to the transition mud so that forming mud skin in the Geotextile and continuing suction filtration and make the transition mud mud-water separation.Dredging mud dewatering of the present invention based on mud transdermally water, the mud leatherware produced during suction filtration by the floc sedimentation for being formed has good water penetration, can persistently be drawn water, can prevent geotextiles from blocking and moisture can be allowed by realizing lasting dehydration, reach the quick decrement of mud, the place of needs is small, improves mud conditioning efficiency, reduces mud conditioning cost.
Description
Technical field
The present invention relates to a kind of mud dewaterion method, and in particular to a kind of dredging mud vacuum filtration based on mud transdermally water
Dewatering.
Background technology
In order to improve river and lake water quality, ensure the normal flood carrying capacity in river course and and Navigation capacity, the lake, river course of China are all
Carrying out large-scale dredging and desilting engineering.These dredging mud moisture content are high, and density is low, it is difficult to directly utilize.
Existing processing method has by cyclonic separation, the mud-water separation technology of plate compression, or is carried out in stockyard
Precipitation, storing technology.These technologies there are problems that a series of when dredging silt is processed：1st, cyclonic separation is small for containing particle diameter
It is poor in the more mud conditioning effect of 45 microns of particles；2nd, plate compression processed in units amount is low, and equipment investment is big, with desilting
Amount is mismatched；Stockyard precipitation floor space is big, and the time cycle is long.Accordingly, it would be desirable to seek fast and efficiently dewatering, to carry
The efficiency of high disposal, reduces mud conditioning cost.
Utilize the vacuum filtration method of geotextiles treatment high-moisture percentage mud at present, but because fine grained is very in mud
It is many, the blocking of filter cloth can be immediately caused in suction filtration, dewatering efficiency is reduced rapidly, it is difficult to for persistently taking off for a large amount of dredging muds
Water.Therefore need to seek a kind of fast and efficiently dewatering.
The content of the invention
A kind of dredging mud based on mud transdermally water is provided and is taken off the invention aims to overcome the deficiencies in the prior art
Water method.
To reach above-mentioned purpose, the technical solution adopted by the present invention is：A kind of dredging mud dehydration based on mud transdermally water
Method, it is comprised the following steps successively：
（a）The transition mud containing floc sedimentation is formed to flocculant is added in dredging mud；
（b）With geotextiles as filter medium, suction filtration is carried out to the transition mud so that being formed in the Geotextile
Mud skin simultaneously continues suction filtration and makes the transition mud mud-water separation.
Optimally, step（b）In, the geotextiles are 150 ~ 400 mesh.
Optimally, step（b）In, the geotextiles are covered in the surface of vacuum filtration pipe, then the vacuum is taken out
Chimney filter carries out suction filtration in inserting the transition mud.
Further, step（b）In, the negative pressure of vacuum of 75 ~ 105Kpa is provided by vavuum pump to the vacuum filtration pipe
Carry out suction filtration.
Further, step（b）In, with the carrying out of suction filtration, the thickness of mud skin gradually increased before this, finally substantially permanent
Fixed, in the process, the infiltration coefficient of mud skin is also change, specifically, in the starting stage of suction filtration, the infiltration coefficient of mud skin
About 1*10-3cm/s~9*10-3Cm/s, after 1 ~ 3 hour, the infiltration coefficient of mud skin is about 1*10 to suction filtration-4cm/s~9*10-4cm/s。
Therefore, whole suction filtration process, remains water penetration very high.
Further, step（b）In, the starting velocity of the suction filtration is 0.2 ~ 0.5g/cm2S, dropped after 1 ~ 3 hour
To 0.1 ~ 0.15g/cm2S, continues moisture content≤254% of suction filtration to mud.
Optimally, step（a）In, the size of the floc sedimentation is 0.1mm ~ 2mm.
Further, step（a）In, the flocculant is polyacrylamide, iron ion flocculant and aluminium ion flocculant
In one or more of combination.
Further, the addition weight of the polyacrylamide is the 0.1% ~ 0.5% of the dredging mud dry weight, the iron
The addition weight of ionic flocculant or the aluminium ion flocculant is the 10% ~ 15% of the dredging mud dry weight.
Further, step（a）In, the moisture content of the dredging mud is 570% ~ 1150%.
Because above-mentioned technical proposal is used, the present invention has following advantages compared with prior art：The present invention is based on mud skin
Permeable dredging mud dewatering, the mud leatherware produced during suction filtration by the floc sedimentation for being formed has good water penetration,
Can persistently be drawn water, can prevent geotextiles from blocking and moisture can be allowed by realizing lasting dehydration, be reached mud fast
Fast decrement, it is necessary to place it is small, improve mud conditioning efficiency, reduce mud conditioning cost.
Specific embodiment
Dredging mud dewatering of the present invention based on mud transdermally water, it is comprised the following steps successively：（a）To dredging mud
Middle addition flocculant forms the transition mud containing floc sedimentation；（b）With geotextiles as filter medium, the transition mud is taken out
Filter causes to form mud skin and continue suction filtration in the Geotextile to make the transition mud mud-water separation.By adding flocculant
The mud skin of generation has good water penetration（The mud skin infiltration coefficient formed after addition flocculant is probably initially 10-3Cm/s grades,
As the guild of entering of suction filtration drops to 10-4/ s grades, this process has water penetration very high always）, can so prevent geotechnique
Cloth block again can allow moisture pass through realize can continue dehydration, reach the quick decrement of mud, it is necessary to place it is small, improve mud
Slurry treatment effeciency, simplifies construction technology, reduces mud conditioning cost.
Step（b）In, geotextiles are preferably 150 ~ 400 mesh, and geotextiles mesh number is easily caused sludge blockage very much greatly, and
Filter effect is bad if geotextiles mesh number is too small；And the thickness of mud skin be with the suction filtration time increase thicken, it is most thick can be extremely
4cm.The application mode of suction filtration mode and geotextiles has various, in order to improve the treatment effeciency of dredging mud in the present invention, will
Geotextiles are covered in the surface of vacuum filtration pipe, and suction filtration is carried out during vacuum filtration pipe then is inserted into transition mud；Again by true
Empty pump carries out suction filtration to the negative pressure of vacuum that vacuum filtration pipe provides 75 ~ 105Kpa.With the carrying out of vacuum filtration, due to dredged mud
The moisture content of slurry is gradually reduced and the mud skin that is formed gradually is consolidated, and suction filtration becomes more and more difficult, therefore, in the condition of negative pressure
Under, the starting velocity about 0.2 ~ 0.5g/cm of suction filtration2S, was about 0.1 ~ 0.15g/cm after 1 ~ 3 hour2S, continues suction filtration extremely
Moisture content≤254% of mud can terminate suction filtration.When certain moisture content reaches 254%, can still continue suction filtration, only suction filtration
Efficiency step-down, so from the point of view of cost-effective, preferably stopping suction filtration when moisture content reaches about 254%.
In order that obtaining mud leatherware has good infiltration coefficient, the size of flocculate for being formed is controlled（Maximum length or width）For
0.1mm ~ 2mm, flocculant is preferably the group of one or more in polyacrylamide, iron ion flocculant and aluminium ion flocculant
Close.The addition of flocculant is critically important parameter, and different flocculants needs to add different weight, such as polyacrylamide
It is the 0.1% ~ 0.5% of dredging mud dry weight to add weight, and the addition weight of iron ion flocculant or the aluminium ion flocculant is
The 10% ~ 15% of dredging mud dry weight.Generally, step（a）In, the moisture content of dredging mud（Moisture content is equal to（Weight in wet base-
Dry weight）/ dry weight × 100%）It is 570% ~ 1150%.
The preferred embodiment of the invention will be described in detail below：
Embodiment 1
The present embodiment provides a kind of dredging mud dewatering based on mud transdermally water, and wherein dredging mud is from Taihu Lake
Dredging silt, moisture content is 900%, and the method is comprised the following steps successively：
（a）Take the Taihu Lake dredging mud that 15.4kg moisture content is 900%（Dry weight 1.54kg）, it is added thereto to 7.7g flocculations
Agent PAM, stirs, and forms the floc sedimentation for being about 0.1 ~ 0.5mm（Size herein refers to average-size, similarly hereinafter）；
（b）To transition mud（Transition mud is that dredging silt, by the title after treatment flocculation treatment, is herein above
In order to from being nominally distinguished with dredging mud above）Middle placement surface product is 7.07cm2Suction filtration head, suction filtration head surface
The geotextiles of 400 mesh are cased with, apply the negative pressure of 75Kpa to suction filtration head using vavuum pump（Suction filtration pressure keeps during suction filtration
It is constant）, start suction filtration, mud skin is formed in Geotextile, the starting stage infiltration coefficient of mud skin is higher, and suction filtration speed is reachable
0.3g/cm2S, mud skin is gradually thickening afterwards, and suction filtration speed slowly declines, and after 2 hours, infiltration coefficient decreases suction filtration, but
Still there are water penetration very high, suction filtration speed about 0.1g/cm2S, after 1 hour, mud moisture content drops to 230%.
Embodiment 2
The present embodiment provides a kind of dredging mud dewatering based on mud transdermally water, and wherein dredging mud is from Taihu Lake
Dredging silt, moisture content is 1150%, and the method is comprised the following steps successively：
（a）Take the Taihu Lake dredging mud that 25kg moisture content is 1150%（Dry weight 2kg）, it is added thereto to 0.2kg iron ions wadding
Solidifying agent, stirs, and forms the floc sedimentation for being about 1.0 ~ 1.5mm；
（b）It is 7.07cm to placement surface product in transition mud2Suction filtration head, suction filtration head surface is cased with the geotechnique of 150 mesh
Cloth, the negative pressure of 105Kpa is applied using vavuum pump to suction filtration head, starts suction filtration, and the starting stage, suction filtration speed was up to 0.2g/cm2·
S, afterwards suction filtration speed slowly decline, after 1 hour, suction filtration speed is down to 0.1g/cm to suction filtration2S, after 4 hours, mud moisture content
Drop to 250%.
Embodiment 3
The present embodiment provides a kind of dredging mud dewatering based on mud transdermally water, and wherein dredging mud is from Taihu Lake
Dredging silt, moisture content is 570%, and the method is comprised the following steps successively：
（a）Take the Taihu Lake dredging mud that 20kg moisture content is 570%（Dry weight 3kg）, it is added thereto to 0.45kg iron ions wadding
Solidifying agent and the mixture of aluminium ion flocculant, stir, and form the floc sedimentation of 1.5 ~ 2mm（Size herein refers to average-size）；
（b）It is 7.07cm to placement surface product in transition mud2Suction filtration head, suction filtration head surface is cased with the geotechnique of 300 mesh
Cloth, the negative pressure of 80Kpa is applied using vavuum pump to suction filtration head, starts suction filtration, and the starting stage, suction filtration speed was up to 0.5g/cm2·
S, afterwards suction filtration speed slowly decline, after 3 hours, suction filtration speed is down to 0.15g/cm to suction filtration2S, after 3 hours, mud is aqueous
Rate drops to 254%.
Comparative example 1
This comparative example is essentially identical with step in embodiment 1, unlike do not add flocculant in the comparative example, specifically
For：
（a）Take the Taihu Lake dredging mud that 15.4kg moisture content is 900%（Dry weight 1.54kg）；
（b）It is 7.07cm to placement surface product in mud2Suction filtration head, suction filtration head surface is cased with the geotextiles of 400 mesh, profit
Apply the negative pressure of 75Kpa to suction filtration head with vavuum pump, blocked at once after suction filtration.
The above embodiments merely illustrate the technical concept and features of the present invention, its object is to allow person skilled in the art
Scholar will appreciate that present disclosure and implement according to this that it is not intended to limit the scope of the present invention, all according to the present invention
The equivalent change or modification that Spirit Essence is made, should all be included within the scope of the present invention.
Claims (7)
1. a kind of dredging mud dewatering based on mud transdermally water, it is characterised in that it is comprised the following steps successively：
（a）The transition mud containing floc sedimentation is formed to flocculant is added in dredging mud；The size of the floc sedimentation be 0.1mm ~
2mm；
（b）Geotextiles are covered in the surface of vacuum filtration pipe, during the vacuum filtration pipe then inserted into the transition mud,
With geotextiles as filter medium, the transition mud is carried out suction filtration cause the Geotextile formed water penetration it is good
Mud skin can continue suction filtration makes the transition mud mud-water separation, wherein by vavuum pump to the vacuum filtration pipe provide 75 ~
The negative pressure of vacuum of 105kPa carries out suction filtration.
2. the dredging mud dewatering based on mud transdermally water according to claim 1, it is characterised in that：Step（b）In,
The geotextiles are 150 ~ 400 mesh.
3. the dredging mud dewatering based on mud transdermally water according to claim 1, it is characterised in that：Step（b）In,
With the carrying out of suction filtration, the thickness of mud skin gradually increased before this, last substantially constant, and in the starting stage of suction filtration, mud skin oozes
Saturating coefficient is 1*10-3cm/s~9*10-3Cm/s, after 1 ~ 3 hour, the infiltration coefficient of mud skin is 1*10 to suction filtration-4cm/s~9*10-4cm/
s。
4. the dredging mud dewatering based on mud transdermally water according to claim 1, it is characterised in that：The step
（b）In, the starting velocity of the suction filtration is 0.2 ~ 0.5g/cm2S, 0.1 ~ 0.15g/cm was down to after 1 ~ 3 hour2S, continues
Suction filtration to mud moisture content≤254%.
5. the dredging mud dewatering based on mud transdermally water according to claim 1, it is characterised in that：Step（a）In,
The flocculant is the combination of one or more in polyacrylamide, iron ion flocculant and aluminium ion flocculant.
6. the dredging mud dewatering based on mud transdermally water according to claim 5, it is characterised in that：The polypropylene
The addition weight of acid amides is the 0.1% ~ 0.5% of the dredging mud dry weight, and the iron ion flocculant or the aluminium ion flocculate
The addition weight of agent is the 10% ~ 15% of the dredging mud dry weight.
7. the dredging mud dewatering based on mud transdermally water according to claim 1, it is characterised in that：Step（a）In,
The moisture content of the dredging mud is 570% ~ 1150%.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510391789.2A CN104961323B (en) | 2015-07-07 | 2015-07-07 | A kind of dredging mud dewatering based on mud transdermally water |
| PCT/CN2016/070031 WO2017004968A1 (en) | 2015-07-07 | 2016-01-04 | Mud cake water permeability-based dredged slurry dehydration method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510391789.2A CN104961323B (en) | 2015-07-07 | 2015-07-07 | A kind of dredging mud dewatering based on mud transdermally water |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104961323A CN104961323A (en) | 2015-10-07 |
| CN104961323B true CN104961323B (en) | 2017-06-09 |
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| CN201510391789.2A Expired - Fee Related CN104961323B (en) | 2015-07-07 | 2015-07-07 | A kind of dredging mud dewatering based on mud transdermally water |
Country Status (2)
| Country | Link |
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| CN (1) | CN104961323B (en) |
| WO (1) | WO2017004968A1 (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104961323B (en) * | 2015-07-07 | 2017-06-09 | 河海大学 | A kind of dredging mud dewatering based on mud transdermally water |
| CN107505245A (en) * | 2017-08-29 | 2017-12-22 | 上海市基础工程集团有限公司 | Flocculant and chain cloth performance detection test method |
| CN107607467A (en) * | 2017-08-29 | 2018-01-19 | 上海市基础工程集团有限公司 | Fluid loss and mudcake thickness rapid assay methods |
| CN109734272B (en) * | 2019-01-09 | 2021-12-17 | 西安容达环保有限公司 | Vehicle-mounted cast-in-place pile slurry treatment device and method |
| CN111559846A (en) * | 2020-05-12 | 2020-08-21 | 中建六局水利水电建设集团有限公司 | River channel high-water-content sludge dewatering method |
| CN113582505B (en) * | 2021-08-04 | 2023-03-21 | 江苏科技大学 | Continuous type high-water-content mud decrement hardening system and method |
| CN114134972A (en) * | 2021-10-09 | 2022-03-04 | 江苏盐城水利建设有限公司 | Movable horizontal drainage system and dynamic consolidation dewatering process for dredging sludge storage yard based on same |
| CN114105552A (en) * | 2021-10-31 | 2022-03-01 | 中交隧道工程局有限公司 | High-water-content sludge curing agent and application method thereof |
| CN114436496A (en) * | 2022-01-27 | 2022-05-06 | 浙大城市学院 | Microwave heating vacuum preloading sludge dewatering device and construction method |
| CN114506996B (en) * | 2022-02-08 | 2023-07-18 | 中国一冶集团有限公司 | Engineering slurry rapid dehydration system and dehydration method |
| CN115124204A (en) * | 2022-06-16 | 2022-09-30 | 安徽省交通航务工程有限公司 | Processing method for realizing rapid mud-water separation of dredged mud |
| CN115159811B (en) * | 2022-06-23 | 2024-06-11 | 肇庆市建筑工程有限公司 | Zero-emission underground engineering slurry treatment construction method |
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| CN104961323B (en) * | 2015-07-07 | 2017-06-09 | 河海大学 | A kind of dredging mud dewatering based on mud transdermally water |
-
2015
- 2015-07-07 CN CN201510391789.2A patent/CN104961323B/en not_active Expired - Fee Related
-
2016
- 2016-01-04 WO PCT/CN2016/070031 patent/WO2017004968A1/en active Application Filing
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| CN102358680A (en) * | 2011-10-14 | 2012-02-22 | 安徽山鹰纸业股份有限公司 | Dehydration method for papermaking waste water sludge |
| CN102701567A (en) * | 2012-06-05 | 2012-10-03 | 江苏杰成凯新材料科技有限公司 | Rapid dewatering treatment method for high-water-content dredged silt |
| CN102814079A (en) * | 2012-08-31 | 2012-12-12 | 河海大学 | Concentration system for rapidly concentrating slurry |
| CN104496149A (en) * | 2014-12-22 | 2015-04-08 | 河海大学 | Vacuum electroosmosis curing water supply plant sludge device and use method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104961323A (en) | 2015-10-07 |
| WO2017004968A1 (en) | 2017-01-12 |
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