CN102603151A - Method for sludge dewatering by reinforcement Geotech-bag - Google Patents
Method for sludge dewatering by reinforcement Geotech-bag Download PDFInfo
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- CN102603151A CN102603151A CN2012100384727A CN201210038472A CN102603151A CN 102603151 A CN102603151 A CN 102603151A CN 2012100384727 A CN2012100384727 A CN 2012100384727A CN 201210038472 A CN201210038472 A CN 201210038472A CN 102603151 A CN102603151 A CN 102603151A
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Abstract
The invention provides a method for sludge dewatering by a reinforcement Geotech-bag. According to the method, sludge flocculation, electroosmosis and dewatering by the Geotech-bag are systematically combined together. The method comprises the steps of: adding a flocculating agent, injecting sludge into the Geotech-bag and dewatering through electroosmosis, wherein the implementing steps of an electroosmosis and the Geotech-bag combined device comprises: (1) laying a drainage layer, (2) combining the Geotech-bag and laying electrodes, (3) detaching the Geotech-bag, and (4) removing sludge solid. According to the invention, the dewatering efficiency of the Geotech-bag is effectively improved in a way that the flocculating agent is added and the electroosmosis is adopted, in addition, the vertical Geotech-bag is adopted to reduce the field occupation, and the Geotech-bag can be recycled, therefore, the cost for dewatering is saved.
Description
Technical field
The invention belongs to the sludge reduction processing technology field, relate to a kind of employing geotextile tube bag with municipal sludge or storehouse, lake riverway sludge dehydration method, relate in particular to adopt and add flocculation agent, the method for geotextile tube bag dehydrating effect is strengthened in osmosis.
Background technology
The quantity of wastewater treatment in China factory and sewage works increases year by year; The sludge quantity of supervening also increases severely with day; Except that the excess sludge that WWT produces; How the amount of sludge that China's city river, the annual dredging desilting engineering in lake are produced handles the problem that these mud that produce become needs urgently to solve fast and effectively up to more than 7,000 ten thousand tons.The investigator has done a large amount of research to the sludge dewatering minimizing both at home and abroad; Geotextile tube bag dehydration technique is low with its cost; Treatment capacity is big, and easy-operating advantage receives the very big attention of environment protection circle; Many successful application cases are also arranged at home, and for example middle nascent state city sewage reservoir is administered engineering, engineering etc. is administered in the Shahu Lake, Wuhan.But the liquid Seepage flow time is long during the dehydration of geotextile tube bag, and moisture percentage in sewage sludge will reach below 60% in the pipe bag, needs the time of dehydrating and curing longer, and minimum needs are more than ten days.If the pressure that improves in the pipe bag increases filtration velocity, pipe bag ultimate compression strength need increase a lot of, must select the higher starting material of cost for use, causes the raising of pipe bag cost.
Realize sludge dewatering through modes such as mechanical dehydration, the dehydrations of gravity cf-, can only remove the free water in the mud, but mud still has very high water cut; Mainly be made up of planar water, volume is still bigger, and transportation is disposed inconvenient; Electroosmotic dewatering is combined with the dehydration of geotextile tube bag; Can remedy the deficiency of geotextile tube bag dehydration, accelerate its dewatering efficiency, the planar water in the mud kapillary can be effectively removed in osmosis; And the electric osmose coefficient of mud is far above hydraulic permeability coefficient, and osmosis is a kind of dewatering efficiently.Electric osmose dehydration at present often combines with mechanical dehydration, can improve the dehydrating effect of mechanical dehydration, but treatment capacity is less, and facility investment is big, and processing cost is high.Osmosis is combined with the geotextile tube bag; And in mud, add the dewatering that flocculation agent improves mud earlier; Increase the conductivity of mud; Can shorten the dewatering time of geotextile tube bag dehydration greatly, improve dewatering efficiency, make electroosmotic dewatering can be applied to the dehydration of large area high moisture percentage mud simultaneously.
Summary of the invention
It is high to the purpose of this invention is to provide a kind of dewatering efficiency, the mud dewatering method that processing cost is low, and it is consuming time to have solved the dehydration of geotextile tube bag, the shortcoming that the geotextile tube bag can not reuse.
For achieving the above object, the present invention combines mud flocculation, osmosis and the dehydration of geotextile tube bag, and concrete step is:
(1) add flocculation agent, adopt volume pump in transfer line, to add flocculation agent, and mix through the line mixer that is right after thereafter, flocculation agent not only can be assembled dehydration by accelerate sludge, and follow-up mud conductivity is increased.
(2) inject mud, inject by geotextile tube bag top opening through mixed mud, when liquid level reaches the top of geotextile tube bag; Stop to inject; Liquid level rises gradually geotextile tube bag internal pressure is increased gradually, and the moisture in the mud is by after flowing out in the geotextile tube bag, and the liquid level in the geotextile tube bag can reduce gradually; Repeat to inject mud this moment in the geotextile tube bag, repeat to inject 3～5 times and get final product.
(3) electroosmotic dewatering after 1～3h is accomplished in last injection, is opened osmosis equipment; Mud in the geotextile tube bag is carried out the electric osmose dehydration, and the positive and negative electrode in the osmosis connects adjustable DC power supply, and the reduction with mud moisture content in the treating processes increases voltage; Continue outage after 15～20 hours conduction time, power-off time is less than 15 hours, positive and negative electrode short circuit during outage; With the electric charge of releasing; The artificial geotextile tube bag of patting when outage quickens dehydration and makes negative electrode mud loosening, and follow-up energising dehydration is carried out easily.
The implementation step of osmosis and geotextile tube bag associated plant comprises:
(1) lay layer of displacement: on smooth ground, lay an impermeable layer, vertical pillar is set on impermeable layer, lay layer of displacement then, layer of displacement is installed horizontal strut after laying and accomplishing.
(2) combination geotextile tube bag and laying electrode: on layer of displacement, lay a rectangle geotextile; And graphite anode and the pvc pipe negative electrode that twines copper wire be set on geotextile; Have aperture on the pvc pipe uniformly, and, prevent to stop up aperture and protection copper electrode at pipe outsourcing last layer filtration fabrics.Whenever at a distance from 80～200cm a Graphite Electrodes is set on the rectangular centre line, alignment rectangle two ends are every at a distance from 80～200cm anodic-cathodic arranged in a crossed manner from the center, and the electrode bottom is passed horizontal geotextile and is fixed on the layer of displacement.After laying electrode; The upright geotextile tube bag of rectangle that five faces are sewed it up places in the support with vertical naturally mode; The top is fixed on the hook on the support; Upright geotextile tube bag bottom contact with the geotextile that level is laid and lap is arranged, and lap is rolled over two roll over and step up with mechanical clamp, make its close with become rectangle.
(3) dismounting geotextile tube bag, dehydration subtracts to hold and is solidified into solid under osmosis and natural gravity effect, reach to expect behind the dehydrating effect, the release mechanism anchor clamps, and utilize facility with upright geotextile tube bag pull-up disengaging sewage sludge solid.
(4) remove solid, utilize facility that solid is removed, note not damaging electrode, electrode, geotextile tube bag water can reuse after rinsing well.
In said electrode and geotextile tube bag associated plant; Be that layer of displacement is arranged to the rectangle of area greater than horizontal geotextile tube bag; Adopt the good and hard grating PM for particulate matter of water-permeable to constitute; On the rectangle layer of displacement, lay horizontal soil worker cloth, be provided with water that drainage pipeline will deviate from around the layer of displacement and compile and enter river course or sewage work.
In said electrode and geotextile tube bag associated plant, the negative electrode pvc pipe has the water shoot effect, and worker's cloth is flatly passed in negative electrode and anodic bottom; Be fixed on the layer of displacement; Vertical geotextile is passed on the top, the anode negative electrode is connected in parallel respectively, and identical with the anode and cathode of direct supply.
In said electrode and geotextile tube bag associated plant, need repeat to inject mud, after moisture flows out from the rectangular pipe bag; Liquid level can descend, and repeat to inject mud this moment, repeats to inject 3～5 times and get final product;, the geotextile tube bag do not need energising before not filling with; After last injection mud is accomplished 1～3h, the beginning energized, the regulation range of voltage is at 20～60V.
Because geotextile tube bag of the present invention is a vertical type, the pressure that mud bore in the geotextile tube bag is bigger, quickens oozing out the time of the interior liquid of geotextile tube bag; Add electro-osmotic effects simultaneously; Negative electrode also has drainage, has shortened the dewatering time of geotextile tube bag greatly, and treatment capacity does not reduce when raising the efficiency; The place that vertical type geotextile tube bag takies is less, has saved the space.
Description of drawings
Fig. 1 is the schematic flow sheet of sludge dewatering
Fig. 2 is the synoptic diagram of electric osmose and geotextile tube bag associated plant
Fig. 3 is the layout n. of electrode in the geotextile tube bag
Embodiment
A kind of device of strengthening the sludge dewatering of geotextile tube bag comprises steam piano 1, volume pump 2, flocculation agent storage tank 3, line mixer 4, osmosis and geotextile tube bag associated plant 5, and the step of this osmosis and geotextile tube bag associated plant comprises:
1, lay layer of displacement: on smooth closely knit ground, lay a waterproof membrane 6, support 9 is fixed on the ground, the set-up mode of support is four jiaos of orthogonal four vertical pillars to be set; Four limits are every then evenly is provided with plumb post at a distance from 50cm, and every separated 50cm evenly is provided with buckle on the pillar, after vertical pillar configures; On waterproof membrane, lay the good and solid PM for particulate matter of water-permeable as layer of displacement 7, thickness is 40～60cm, has laid layer of displacement; Horizontal geotextile is laid on the waterproof layer; Horizontal strut evenly is fixed on the plumb post through buckle, and horizontal strut is spaced apart 50cm, after pillar sets; Thrust-augmenting nozzle and water shoot are set around the waterproof membrane, and the sewage discharge that mud is deviate from is to sewage work or directly discharge.
2, combination geotextile tube bag and laying electrode: on the horizontal geotextile that lays, evenly arrange negative electrode 11 and positive electrode 12; Arrangement mode is seen Fig. 3; Every electrode space 100cm; The lower end of anodic-cathodic superscribes hard insulating material, and the bottom is passed horizontal geotextile and is fixed on layer of displacement 7, and wrapped with insulation length is advisable for just exposing horizontal geotextile tube bag.After electrode fixes; The geotextile tube bag 10 that to make with mechanical implement vertically puts down, and the top is fixed through the hook of evenly arranging on the plumb post, makes the pipe bag can keep vertical flattened state; Bottom and level geotechnique are furnished with lap roll over two foldings, with mechanical clamp 8 along arround fixing.Electrode tip is fixed with a bit of insulating hollow tubule, and passes geotextile tube bag top, and electric wire is communicated with electrode through the insulation tubule, and with negative electrode 11 and anode 12 respectively and be connected to the positive and negative electrode of adjustable direct supply 14.Geotextile tube bag top is provided with the mud import, can combine with the sludge carrier pipe road is airtight.
3, inject mud: through steam piano 1 transmission, volume pump 2 adds flocculation agent, and behind line mixer 4, is injected in the geotextile tube bag with the mud slurries; After pipe bag is filled with, stop filling, treat that moisture in the mud flows out after; The space can be vacated in geotextile tube bag top, continues filling this moment.Repeat filling 3～5 times, accomplish filling.
4, electric osmose dehydration: the filling completion was connected adjustable direct supply 14 after one hour, and the regulation range of voltage increases along with managing the interior mud resistance of bag after the employing low voltage earlier during beginning at 20～60 volts, increases voltage gradually.After energising 18 hours, cut off the power supply 14 hours, when cutting off the power supply with the anode and cathode short circuit under; Drain charges accumulated, and pat the geotextile tube bag, quicken the dehydration of geotextile tube bag; Moisture in the mud is discharged under the dual function of gravity and osmosis fast, and water ratio can drop to below 60% after 7 days.
5, dismounting geotextile tube bag: after moisture percentage in sewage sludge reaches requirement, mechanical clamp 8 is unclamped, with drawing on the geotextile tube bag of mechanical implement with five closures in top; Make it break away from the soil body, then the support frame is removed, after support is removed; Carefully remove dewatered solid with utensil, electrode is taken out.Can repeat aforementioned combination step, recycling vertical type geotextile tube bag and electric osmose dewatering unit.
Claims (8)
1. strengthen geotextile tube bag dehydration method for one kind, it is characterized in that comprising following operation steps: add flocculation agent and warp and mix, repeat to inject mud, osmosis and the combined dehydration of geotextile tube bag.
2. a kind of reinforcement geotextile tube bag dehydration method according to claim 1 is characterized in that: the reduction with mud moisture content in the combined processed process of osmosis and geotextile tube bag increases voltage, and the scope of voltage is at 20～60V.
3. a kind of reinforcement geotextile tube bag dehydration method according to claim 1; It is characterized in that: continue outage after 15～20 hours the conduction time of osmosis and the combined dehydration of geotextile tube bag; Power-off time was less than 15 hours, and positive and negative electrode short circuit during outage is with the electric charge of releasing.
4. a kind of reinforcement geotextile tube bag dehydration method according to claim 1 is characterized in that: adopt the artificial geotextile tube bag of patting during the electroosmotic dewatering outage.
5. strengthen geotextile tube bag dehydration method for one kind, it is characterized in that the implementation step of osmosis and geotextile tube bag associated plant comprises:
(1) lay layer of displacement: on smooth ground, lay an impermeable layer, vertical pillar is set on impermeable layer, lay layer of displacement then, layer of displacement is installed horizontal strut after laying and accomplishing.
(2) combination geotextile tube bag and laying electrode: on layer of displacement, lay a rectangle geotextile, and anodic-cathodic is set on geotextile, the electrode bottom is passed horizontal geotextile and is fixed on the layer of displacement.After laying electrode; The upright geotextile tube bag of rectangle that five faces are sewed it up places in the support with vertical naturally mode; The top is fixed on the hook on the support; Upright geotextile tube bag bottom contact with the geotextile that level is laid and lap is arranged, and lap is rolled over two roll over and step up with mechanical clamp, make its close with become rectangle.
(3) dismounting geotextile tube bag, dehydration subtracts to hold and is solidified into solid under osmosis and natural gravity effect, reach to expect behind the dehydrating effect, the release mechanism anchor clamps, and utilize facility with upright geotextile tube bag pull-up disengaging sewage sludge solid.
(4) remove solid, utilize facility that solid is removed, note not damaging electrode, electrode, geotextile tube bag water can reuse after rinsing well.
6. a kind of reinforcement geotextile tube bag dehydration method according to claim 5; The set-up mode that it is characterized in that anodic-cathodic is whenever at a distance from 80～200cm a Graphite Electrodes to be set on the rectangular centre line, and alignment rectangle two ends are every at a distance from 80～200cm anodic-cathodic arranged in a crossed manner from the center.
7. in osmosis according to claim 5 and the geotextile tube bag associated plant; It is characterized in that: said support; Be by being fixed in the plumb post on the ground and constituting through the horizontal stand of snap fit on vertical support frame; The spacing of plumb post and horizontal strut does not have 50cm, and the top of vertical support frame is provided with hook, is used for fixing the geotextile tube bag.
8. in osmosis according to claim 5 and the geotextile tube bag associated plant, it is characterized in that: said anode is a graphite material, and negative electrode is for twining the pvc pipe of copper wire; And on pvc pipe, evenly have aperture; And at pipe external parcel last layer filtration fabrics, anode and negative electrode lower end are enclosed with hard insulating material, and pass horizontal geotextile tube bag and be fixed on the layer of displacement; Wrapped with insulation length is advisable for just exposing horizontal geotextile tube bag; The top of anode and negative electrode is fixed with a bit of insulating hollow tubule, and passes geotextile tube bag top, and electric wire is communicated with electrode through the insulation tubule.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201210038472 CN102603151B (en) | 2012-02-21 | 2012-02-21 | Method for sludge dewatering by reinforcement Geotech-bag |
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| CN 201210038472 CN102603151B (en) | 2012-02-21 | 2012-02-21 | Method for sludge dewatering by reinforcement Geotech-bag |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103613266A (en) * | 2013-12-11 | 2014-03-05 | 哈尔滨北方环保工程有限公司 | Electroosmosis sludge modifying and drying device |
| CN104445860A (en) * | 2014-11-02 | 2015-03-25 | 北京工业大学 | Mud and water separation method for waste drilling sludge of cast-in-situ bored pile |
| CN105668981A (en) * | 2016-03-10 | 2016-06-15 | 江苏圣意达自控科技有限公司 | Electroosmosis sludge dewatering treating system |
| CN109502934A (en) * | 2018-11-01 | 2019-03-22 | 中国电建集团华东勘测设计研究院有限公司 | A kind of electric osmose filter bag depth of mud dewatering |
| CN111101887A (en) * | 2018-10-29 | 2020-05-05 | 中国石油天然气股份有限公司 | Comprehensive utilization device and method for recycling well cementation waste cement slurry |
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| JPS58122085A (en) * | 1982-01-13 | 1983-07-20 | Mitsubishi Heavy Ind Ltd | Dehydrating method |
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| JPS58122085A (en) * | 1982-01-13 | 1983-07-20 | Mitsubishi Heavy Ind Ltd | Dehydrating method |
| CN102249515A (en) * | 2011-07-14 | 2011-11-23 | 中交天津港航勘察设计研究院有限公司 | Dredged mud dewatering method for small suction cutter dredger |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103613266A (en) * | 2013-12-11 | 2014-03-05 | 哈尔滨北方环保工程有限公司 | Electroosmosis sludge modifying and drying device |
| CN103613266B (en) * | 2013-12-11 | 2015-11-18 | 哈尔滨北方环保工程有限公司 | Osmosis sludge modification desiccation apparatus |
| CN104445860A (en) * | 2014-11-02 | 2015-03-25 | 北京工业大学 | Mud and water separation method for waste drilling sludge of cast-in-situ bored pile |
| CN105668981A (en) * | 2016-03-10 | 2016-06-15 | 江苏圣意达自控科技有限公司 | Electroosmosis sludge dewatering treating system |
| CN111101887A (en) * | 2018-10-29 | 2020-05-05 | 中国石油天然气股份有限公司 | Comprehensive utilization device and method for recycling well cementation waste cement slurry |
| CN111101887B (en) * | 2018-10-29 | 2022-03-29 | 中国石油天然气股份有限公司 | Comprehensive utilization device and method for recycling well cementation waste cement slurry |
| CN109502934A (en) * | 2018-11-01 | 2019-03-22 | 中国电建集团华东勘测设计研究院有限公司 | A kind of electric osmose filter bag depth of mud dewatering |
| US11008242B2 (en) | 2018-11-01 | 2021-05-18 | Powerchina Huadong Engineering Corporation Limited | Deep sludge dewatering method using electroosmosis with filter bags |
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Address after: 300467, Tianjin, Tianjin new eco city road, creative building, building 5, seven floor Patentee after: Tianjin Ecology City Environmental Protection Co., Ltd. Patentee after: TIANJIN XINSHENG ENVIRONMENT DEVELOPMENT CO., LTD. Address before: 300467, Tianjin, Tianjin new eco city road, creative building, building 5, seven floor Patentee before: Tianjin Ecology City Environmental Protection Co., Ltd. Patentee before: Tianjin Ecology City Water Co.,Ltd. |