CN108862956A - A kind of sludge dewatering decontamination combined governance method - Google Patents

Abstract

The invention discloses a kind of sludge dewaterings to decontaminate combined governance method, belongs to Polluted Soil and administers field.The electrode group that the not only electrically conductive but also water through electrode of horizontal direction arrangement is constituted alternate with sludge blanket is stacked；Apply direct current by electrode and generate electric field in sludge, while liquid appropriate is injected by the water-filled pipe of electrode, to regulate and control the chemical reaction environment in sludge；Under electric field action, pollutant contained in sludge is taken out of to electrode transfer, and by liquid through the water-filled pipe of electrode, to realize the removing of pollutant in sludge；The moisture in sludge is discharged to electrode transfer and from the water-filled pipe of electrode simultaneously, furthermore it is upper cover gravity under the action of, the water in sludge, which is pressed further by electrode, from water-filled pipe, to be discharged.The implementable big scale of construction sludge dewatering of the present invention and decontamination, can remove multiple pollutant in sludge simultaneously, and the time handled is short, construction area is few.

Description

A kind of sludge dewatering decontamination combined governance method

Technical field

The present invention relates to a kind of sludge dewaterings to decontaminate combined governance technology, belongs to Polluted Soil and administers field.

Background technique

Clear up river, lakebed generates a large amount of mud.These mud water content are high, usually flowable state or stream plastic state；It is dirty Mud is made of tiny particle, permeability is very low, and usual infiltration coefficient is lower than 10^-4cm/s.There is the dirt of high-content in sludge simultaneously Object is contaminated, pollutant kind includes organic pollutant and inorganic matter pollutant two major classes；There are many different again for each pollutant Type, such as：Have heavy metal contaminants in inorganic matter pollutant, heavy metal contaminants again according to the difference of contained heavy metal and It is different.In addition, some industrial processes also have a large amount of sludge to generate.These sludge must be dehydrated and are removed with dirt Object is contaminated, to realize minimizing and innoxious.

Currently, the dehydration of sludge substantially borrows the fast dewatering method of industrial production line, as mechanical presses, centrifugation are de- The methods of water, drying, since sludge permeability is very low, these methods higher cost for the sludge dewatering of the big scale of construction.It is existing All there are at least two defects for the pollutant process technology of various sludge in some：First, being lower than 10 for infiltration coefficient^{- 4}The low-permeability fine grained Polluted Soil poor effect of cm/s.Second, it is only effective to a certain specific pollutant, such as：It is suitable for The technology of organic pollutant processing is generally unsuitable for inorganic matter pollutant process；It is effective to the processing of a certain heavy metal contaminants Technology, may be invalid to another heavy metal contaminants；Furthermore some processing techniques, such as solidification and stabilization technology, not Pollutant is removed, therefore not guaranteed to the stability stored up for a long time after pollutant control.Moreover, consolidating to the scale of construction big in this way Body pollution object is after governance process neutralisation treatment, it usually needs occupies large area place, expends for quite a long time, these conditions It is often difficult to be met.

Summary of the invention

The invention proposes a kind of sludge dewaterings to decontaminate combined governance technology.It can be to the sludge of the low-permeability of the big scale of construction What is be dehydrated and decontaminated simultaneously is effectively treated, and can effectively remove a plurality of types of pollutants.In addition, governance process and Store up that occupied ground is few, short processing time after improvement.It to realize the minimizing and harmless treatment of sludge, and is recycling benefit With laying a good foundation.

When imposing DC electric field to sludge, under electric field action, two kinds of effects are at least generated：1）Moisture in sludge, meeting It can be discharged under the action of electric field to electrode transfer；2）Harmful substance in sludge can be removed to electrode transfer；It is dirty Harmful substance has following mechanism to electrode transfer in mud：1）Charged particle in sludge can be moved to the electrode electrically opposite with it It moves, thus by the pollutant of electrification（Such as：Heavy metal）Clear out of sludge；2）Water in sludge can be to cathodic migration, the flowing of water It can be with small neutral particle to cathodic migration, thus by some non-polar particles（Such as：Greasy dirt etc.）It is removed from sludge； 3）The electrolysis that water occurs at electrode, generates hydrogen ion and hydroxide ion；It can be regulated and controled in sludge by method appropriate Environment is chemically reacted, the desorption of contaminants for being adsorbed in sludge originally is made, or original insoluble pollutant is made to be changed into soluble substance, To be removed out sludge under above two effect.

Under the continuous effect lower than its bearing capacity, moisture therein can gradually be discharged sludge；The rate of draining with The length of its drainage path is in negative exponent correlativity.More drainage channel is such as set in sludge, shortens drainage path just Drainage rates can be increased substantially.Under pressure, with the discharge of dampening, sludge void content reduce, sludge bearing capacity by Step improves.

This technology is exactly using DC electric field while to have both of dehydration and decontamination effects, will be not only electrically conductive but also can It is arranged in sludge with the pipe of water flowing or band electrode, horizontal direction, DC electric field is established in sludge, while passing through electrode injection Liquid appropriate makes to migrate the liquid flowed out in electrode to the pollutant of electrode to regulate and control the chemical reaction environment in sludge It takes out of, realizes the dual purpose for making sludge while dehydration and decontamination.

Meanwhile using having conductive and draining dual function electrode band, row is increased while constructing DC electric field Aquaporin shortens drainage path；Using the busbar water electrode band method successively accumulated alternate with sludge, using sludge from Weight, on the one hand makes sludge continue to be dehydrated under pressure, is superimposed with the Dehydration under the effect of aforementioned DC electric field, so as to To reduce time and the energy consumption of direct current electric dehydration；On the other hand itself bearing capacity for improving sludge, can further increase Sludge weight is covered, and the increase of heap weight further improves the displacement and bearing capacity of lower layer's sludge, so recycles, gradually increases Add sludge high, so as to so that sludge height is significantly promoted.Sludge handling process and stockpiling can so be taken up an area significantly It reduces.

A kind of sludge dewatering of the invention decontaminates combined governance technology, includes the following steps：Electrode used therein is that can both lead Electricity again can be with the pipe of water flowing, band electrode.The electrode group being made of one group of parallel, horizontal direction arrangement at regular intervals electrode It is alternate with certain thickness sludge blanket to stack.In the plane perpendicular to electrode, the pole of any one the connect DC power supply of electrode Property it is opposite with around the polarity of at least one the connect DC power supply of electrode in its electrode.Apply direct current in sludge by electrode Middle generation electric field, while liquid appropriate is injected by the water-filled pipe of the electrode of connection power positive cathode respectively, to regulate and control dirt Chemical environment in dye soil.Under electric field action, on the one hand, contained pollutant is to electrode transfer in sludge, and by liquid through electricity The water-filled pipe of pole is taken out of, to realize the removing of harmful substance in sludge；On the other hand, the moisture in sludge is to electrode transfer And it is discharged from the water-filled pipe of electrode.In addition, it is upper cover sludge gravity under the action of, the water in sludge is pressed further by electricity Pole is discharged from the water-filled pipe of electrode.

The electrode has following several configurations：

1, the section form of the pipe being made of an electrically conducting material, pipe is unlimited；Tube wall is by the interval and aperture of design with water-permeable The geometry of aperture, aperture is unlimited, and the diameter or short side dimension in hole are 0.1 ~ 50mm, and the gross area of aperture accounts for tube wall surface product Ratio be 5% ~ 95%；

2, in conductive material wire rod（Rope, bandlet, muscle etc.）Housing water pipe is constituted, and wherein water pipe tube wall is by the interval and aperture designed With aperture, the geometry of aperture is unlimited, and the diameter or short side dimension in hole are 0.1 ~ 50mm, and the gross area of aperture accounts for tube wall table The ratio of area is 5% ~ 95%；Electrode sections form is unlimited；

3, outsourcing filtering layer is constituted again on the basis of 1 or 2 configuration（Filtering layer is to prevent sludge fine grained from entering electrode）；

4, commercially available conductive plastics drain bar（By being constituted along length direction with the conductive material bands outsourcing filtering layer of concave guiding gutter）；

5, it is further added by a leafing proton exchange on the basis of 1 or 2 or 3 or 4 configuration and constitutes,

Wherein：

1, conductive material is well known various conductive materials, including but not limited to：Carbon fiber, various corrosion resistant metal materials, Graphite, conducting polymer, by carbon fiber, various metal materials, graphite etc. and the compound electric conductor constituted of polymer；

2, water pipe is well known various non-conductive water pipes, including but not limited to：Plastic tube, various non-conductive fibrous materials are woven into Pipe；It can be the pipe for being able to maintain specific cross-sectional shape, be also possible to the unfixed pipe of cross sectional shape；

3, filtering layer is known permeable flexible material, including but not limited to：Non-woven fabrics, cloth that plant fiber is made into, chemical fibre The cloth etc. being made into；

4, amberplex includes the amberplex of well known anionic or cationic or amphoteric ion type, is respectively used to Anode and cathode；Ion exchange membrane type selection is determined according to Polluted Soil property, pollutant kind by design.

The electrode can be the electrode for all using same electrode, being also possible to connect power cathode（Cathode）It adopts With a kind of electrode, the electrode of connection positive pole（Anode）Using another electrode.

The sludge is permeability lower than 10^-4The fine grain of cm/s is in fluidised form or the sludge for flowing plastic state, contained pollution Object may be organic pollutant（It is including but not limited to below one or more：Gasoline, diesel oil, PAH polycyclic aromatic hydrocarbons (PAH), embedding two Naphthalene, carbolic acid, pentachlorophenol, petroleum hydrocarbon, phenanthrene, TCE trichloro ethylene, pentadecane binary acid, PEC haloflex, dyestuff, chlordene Butadiene, BTEX benzene homologues, benzene, toluene, ethylene, dimethylbenzene etc.）, it is also possible to inorganic pollution（It is including but not limited to following It is one or more：The heavy metals such as lead, chromium, cadmium, cobalt, caesium, copper, mercury, nickel, magnesium, molybdenum, zinc, uranium, thorium, radium, strontium, antimony, halide, Arsenic As, phosphorus, phosphate, nitrate, fluorine etc.）.

The liquid can be fresh water；It is also possible to well known acid（It is including but not limited to below one or more：Second The organic acids such as acid, citric acid, the inorganic acids such as hydrochloric acid, sulfuric acid）The solution of composition, for adjusting the pH value of liquid in cathode；It can also To be with well known alkali（It is including but not limited to below one or more：Sodium hydroxide, calcium hydroxide, ammonium hydroxide etc., and The basic salt such as sodium bicarbonate）The solution of composition, for adjusting the pH value of liquid in anode；It is also possible to joined well known surface work Property agent（The including but not limited to anionic surfactant such as SDS lauryl sodium sulfate, DAH dodecyl hypochlorous acid ammonia etc. The nonionic surface active agent such as cationic surface active agent and Bril30 polyethylene glycol oxide）Or complex compound or chelate （It is including but not limited to below one or more：Hydroxypropyl-β-cyclodextrin, ammonium hydroxide, EDTA ethylenediaminetetraacetic acid, NTA times Nitrilotriacetic acid（Rouge）,EGTA（Ethyleneglycol bistetraacetic acid, tetraacethyl, ethylene glycol bis ether tetraacethyl etc.）,DTPA（Diethylenetriamine Pentaacetic acid, diethylenetriamine pentaacetic acid, diethylene-triamine pentaacetic acid, diethylenetriaminepeacidcetic acidcetic）, DCyTA acetic acid etc.）What is constituted is molten Liquid makes it easy to for combining with pollutant with liquid movement.Such as：SDS input cathode is used to repair contaminated by diesel oil soil, hydroxyl Propyl-beta-cyclodextrin repairs luxuriant and rich with fragrance Polluted Soil, and surfactant sodium dodecyl base sulfate is added in the anode can remove chlordene fourth Diene.The selection of kind of liquid is determined according to practical pollution soil characteristics by design.

Specific embodiment

1, the spaced horizontal for determining length sum number purpose pipe or band electrode to design will be designed to parallel arrangement, form one Layer electrode group.To guarantee the voltage provided on whole branch electrode is substantially uniform, on every electrode appropriate intervals extraction wire, and Connection is connected to the same pole of power supply（It is determined through testing by design according to the physics of sludge and chemical property condition at extraction wire interval It is fixed）.By in the electrode group connect the same polar each electrode both ends of power supply respectively with it is same water inlet be in charge of with it is same draining be in charge of Connection；

2, the sludge of paving design thickness on it（The sludge end can use well known method, such as earth bag or earth bank to do Method carries out supporting and retaining system and is unlikely to collapse to maintain the dimensionally stable of the sludge blanket）；

3, one layer of electrode group is arranged in the way of 1 again on the sludge blanket.The electrode of this layer of electrode group and other each layer electrode groups Electrode be parallel to each other；

4, in this layer of electrode group in the way of 2 the sludge of paving design thickness again；

5, above-mentioned 1 ~ 4 repetitive operation is pressed, until reaching the sludge number of plies of design.The increase of every layer of sludge blanket thickness and sludge blanket Rate need to be coordinated with lower layer's sludge drainage rates and gain in strength rate, calculated and determined based on test result by design.It is top It is covered in electrode group with the appropriate pure land, plays guard electrode；

6, the arrangement mode of each layer electrode group connection electric power polarity has following four：

1）Singular layer electrode group connects the same polarity of power supply, and even numbers layer electrode group connects the opposite polarity of power supply（Call electrode A 1 in the following text Connection）；

2）Singular layer electrode group connects the same polarity of power supply, and the adjacent electrode in even numbers layer electrode group connects the opposite of power supply respectively Polarity（Call the connection of electrode A 2 in the following text）；It can also connect the same polarity of power supply with even numbers layer electrode group, and the phase in singular layer electrode group Adjacent electrode connects the opposite polarity of power supply respectively.Following sequence of construction is described by taking the connection of electrode A 2 as an example；

3）During being dehydrated and clearing the pollution off, the lower electrode group of every layer of sludge all connects the same polarity of power supply, and every The upper electrode group of layer sludge all connects the opposite polarity of power supply（Call electrode B connection in the following text）；

4）The adjacent electrode of each layer of electrode group connects the anode and cathode of power supply respectively, and each layer electrode group is in vertical same plane Adjacent electrode be also the anode and cathode for connecing power supply respectively（Call electrode C connection in the following text）,

The arrangement mode that electrode group connects electric power polarity is different, determines different sequences of construction；

7, when the connection of electrode A 1 or A2 connection, sequence of construction is as follows：

1）After the completion of third layer sludge paves, first layer electrode group and third layer electrode group are connect to a certain pole of power supply（Call A in the following text Pole）；Electrode A 1 is connected, second layer electrode group is connect to the opposite pole of power supply（Call the negative pole A in the following text）；Electrode A 2 is connected, by second Layer electrode group adjacent electrode connects the pole A and the negative pole A of power supply respectively.Simultaneously by the water inlet point of the electrode group of each layer connection pole power supply A Pipe（It calls in the following text into water and is in charge of A）Be connected to the water inlet manifold A for leading to feed flow source A, by each layer connection the negative pole A of power supply electrode group into Moisture pipe（It calls in the following text into water and is in charge of negative A）It is connected to the negative A of water inlet manifold for leading to the negative A in feed flow source；The electrode group of the pole power supply A will be connected Draining be in charge of（It calls draining in the following text and is in charge of A）It is connected to the main sewer A for leading to liquid storage pool A；The electrode group of the negative pole A of power supply will be connected Draining be in charge of（It calls draining in the following text and is in charge of negative A）It is connected to the negative A of main sewer for leading to the negative A of liquid storage pool.Apply the voltage of design；Together When intake be in charge of A and the determining suitable particular liquid of negative A supply design is in charge of in water inlet respectively.Start first layer and the second layer The dehydration and pollutant reset procedure of sludge；

2）Continue the 4th layer of setting and layer 5 sludge and the 4th layer and layer 5 electrode at the same time；

3）After the completion of layer 5 sludge paves, layer 5 electrode group is connect to the pole A of power supply, the 4th layer of electrode group is connect into power supply The negative pole A（Electrode A 1 connects）Or adjacent electrode is connect to the pole A and the negative pole A of power supply respectively（Electrode A 2 connects）.Simultaneously by each layer into Moisture pipe A is connected to water inlet manifold A, and negative A is in charge of in the water inlet of each layer and is connected to the negative A of water inlet manifold；A is in charge of in draining and is connected to row Supply mains A；Negative A is in charge of in draining and is connected to the negative A of main sewer.Apply the voltage of design；Simultaneously respectively through water inlet be in charge of A and into The determining suitable particular liquid of the negative A supply design of moisture pipe.Dehydration and the pollutant for starting third layer and the 4th layer of sludge are clear The process removed；

4）By 2）With 3）Identical step repetitive operation, one group of successive of every two layers of sludge complete each layer sludge pave with electrode, The installation and dehydration of water pipe and pollutant remove work；

5）With the discharge of moisture content and pollutant in each layer sludge, hold it when the water content in sludge drops to certain degree After carrying power and can satisfy and pave subsequent sludge blanket on it（The index or bearing capacity index of water content decline are tested to be counted by design It calculates and determines）And in sludge after each pollutant concentration reaches the final index of design code, can successive close power supply and watering, Until the water content and each pollutant concentration of two layers of sludge of highest reach design object, all power and feed flow source can be closed； It is upper cover sludge gravity under, the water in sludge continues through the electrode that can be drained and is discharged through drainpipe, until sludge contains Water reaches design requirement, and the pollutant for completing whole sludge is removed and dehydration construction；

8, when electrode B connects, sequence of construction is as follows：

1）After the completion of second layer sludge paves, first layer electrode group is connect to the pole A of power supply, second layer electrode group is connect into power supply The negative pole A.A is in charge of in water inlet is connected to water inlet manifold A simultaneously, and the negative A of negative A connection water inlet manifold is in charge of in water inlet；A is in charge of in draining It is connected to main sewer A；Negative A is in charge of in draining and is connected to the negative A of main sewer.Apply the voltage of design；It is in charge of A through water inlet simultaneously It is in charge of the determining suitable particular liquid of negative A supply design with water inlet.The dehydration and pollutant for starting first layer sludge were removed Journey；

2）Continue that third layer electrode and third layer sludge is arranged at the same time；

3）When the water content in first layer sludge drop to certain degree make its bearing capacity can satisfy pave on it is subsequent Sludge blanket（The index or bearing capacity index of water content decline are determined by test）And each pollutant concentration reaches design rule in sludge After fixed final index, the power supply of first layer and second layer electrode can be closed, remaining moisture covers sludge from above in sludge Gravity drives discharge；

4）After the completion of third layer sludge paves, and meet 3）Condition after, will by the pole A of second layer electrode group reconfiguration power supply Third layer electrode group connects the negative pole A of power supply.A correspondingly is in charge of in water inlet and is connected to water inlet manifold A, negative A connection is in charge of in water inlet In the negative A of water inlet manifold；A is in charge of in draining and is connected to main sewer A；Negative A is in charge of in draining and is connected to the negative A of main sewer.Apply The voltage of design；It is intake to be in charge of A and intake simultaneously and is in charge of the determining suitable particular liquid of negative A supply design.Start second The dehydration and pollutant reset procedure of layer sludge；

5）By 2）,3）With 4）Paving and electrode, water pipe for each layer sludge thereon is completed in identical step and method repetitive operation Installation steps and pollutant remove and dewatering work.It is set until the water content and each pollutant concentration of top sludge reach Target is counted, all power and feed flow source can be closed；It is upper cover sludge gravity under, the water in sludge, which continues through, to be drained Electrode be discharged through drainpipe, until the water content of sludge reaches, design is final to be required, and the pollutant for completing whole sludge is removed It constructs with dehydration；；

9, when electrode C connection, sequence of construction is as follows：

1）After the completion of first layer sludge paves, the cathode sets of first layer electrode are connect to the cathode of power supply, anode unit electrode is connect The anode of power supply.A is in charge of in the water inlet of each layer connection cathode simultaneously and is connected to water inlet manifold A, the water inlet of jointed anode is in charge of Negative A is connected to the negative A of water inlet manifold；A is in charge of in the draining for being connected to cathode and is connected to main sewer A；The row of anode will be connected to The negative A of moisture pipe is connected to the negative A of main sewer.Apply the voltage of design；It is in charge of A through water inlet simultaneously and water inlet is in charge of negative A supply and is set Count stable suitable particular liquid.Start the dehydration and pollutant reset procedure of first layer sludge；

2）Continue that second layer electrode is arranged at the same time；

3）Water content drops to its bearing capacity and can satisfy thereon after second layer electrode is installed, and in the first layer sludge It paves after next sludge blanket, continues the second layer sludge that paves（At this point, the bearing capacity of first layer sludge may only can satisfy second Layer sludge paves requirements, not necessarily meets the standard that design powers off, so first layer electrode may be powered off not yet）；

4）After the completion of second layer sludge paves, by 1）Identical step and method, carry out second layer electrode and water pipe peace Dress and pollutant removing and dewatering work；

5）By 2）~4）Identical step and method completes each layer sludge thereon and paves and electrode, the installation of water pipe and removing dirt Contaminate object and dewatering work；

6）Its bearing capacity is set to can satisfy the subsequent dirt that paves on it when the water content in each layer sludge drops to certain degree Mud layer（The index or bearing capacity index of water content decline, which are tested to be calculated by design, to be determined）And each pollutant concentration reaches in sludge To after the final index of design code, this layer of power supply and feed flow source can be closed, remaining moisture by covering thereon in this layer of sludge The gravity of sludge drives discharge.Until the water content and each pollutant concentration of top sludge reach design object, can close All power and feed flow source；

7）It is upper cover sludge gravity under, the water in sludge continues through the electrode that can be drained and is discharged through drainpipe, continues dirty The drainage procedure of mud, until the water content of sludge reaches design requirement, the pollutant for completing whole sludge is removed and dehydration is applied Work；；

10, the voltage is 40V ~ 400V, and positive and negative anodes voltage gradient is 0.3V/cm ~ 4V/cm；The voltage applied, which can be, to be held Continue stable voltage, is also possible to the voltage of intermittent entry.It is true by designing through field test according to the physicochemical properties of sludge It is fixed；

11, each segment length of the electrode is determined according to field condition by design, can be between 10m ~ 500m；Electrode gap and dirt Mud thickness is according to the physicochemical properties of sludge through field test by design determination, generally 0.5m ~ 3m；Upper layer and lower layer electrode Vertically it can be can also being misaligned for alignment, such as can translate half interval forms the electrode of upper layer and lower layer identical polar Isosceles triangle arrangement；

12, the liquid component of the liquid supply pipe injection is tested according to pollutant component is determined by design.It can be fresh water, it can also Desired ingredient can be formed by chemical reactions such as acid-base neutralization, complexing, chelating, desorptions with pollutant in sludge Liquid.Water pipe caliber, hydraulic pressure, water are tested to be determined by design, can be given according to the ion concentration content and design of test water outlet Index out adjusts water；The initial time of feed flow and termination time are tested according to sludge characteristics to be determined by design, Ke Nengyu The initial time of power supply is identical, it is also possible to different；

13, condition, time and rate that the high thickness of the heap of every layer of sludge, sludge stack total number of plies, increase next layer of sludge, according to The property of sludge is tested to be calculated by design and be determined；

Technical effect of the invention：

1, the dehydration of sludge and the removing of multiple pollutant can be completed at the same time；

2, it due to the work that the present invention is dehydrated sludge and clears the pollution off by the way of vertically stacking, takes full advantage of Vertical direction spatial, therefore the dehydration and pollutant removing of big scale of construction sludge in limited site area, can be implemented；

3, due to the construction that can be dehydrated and be cleared the pollution off simultaneously with multilayer sludge, and every layer of sludge everywhere can be synchronized substantially It is drained and is cleared the pollution off, therefore for big scale of construction Treatment of Sludge, period total time of dehydration and decontamination is short；

4, the dehydration that DC electric field drives is had complementary advantages in conjunction with the dehydration of gravity drive.Utilize the de- of DC electric field driving Water speed rate is fast, and pulpous state sludge fast dewatering is covered the ability of sludge to allowing to be quickly obtained in carrying；It is dirty using the big scale of construction The characteristics of mud processing is whole, and time-consuming, can satisfy the time cycle required for gravity dehydration, is greatly reduced using gravity dehydration Energy consumption.The dehydration individually driven by DC electric field, because the hole that reason moisture content occupies in dehydrated sludge is not reduced, therefore holds It is limited to carry power raising；The gravity that sludge is covered on and can eliminate hole and increase substantially its bearing capacity, be convenient for subsequent sludge blanket Quick heap build；

5, electrode horizontal direction arrangement has the following advantages：1）Since electrode length can increase considerably and can guarantee that voltage is uniform, Therefore the sludge scale of construction of single treatment can be significantly increased, and total processing time is reduced；2）Each work such as electrode and water guide access arrangements Skill is easy for construction；3）Convenient for the flowing of liquid in electrode, this quality for not only improving liquid in coordination electrode is conducive to control again Electrode temperature rise, it is ensured that chemical environment and electric field quality are more advantageous to the smooth progress that pollutant is removed and is dehydrated in sludge； 4）Due to there is gravity pressure, the seam generated between electrode and sludge because electrode temperature raising makes sludge dewatering can be made up Gap, to reduce resistance, improve working efficiency.

Embodiment

Embodiment one

Certain electroplate factory's sludge：Particle diameter distribution is 50%<13 μm, 98%<25μm；PH=5.2, infiltration coefficient 1.2 × 10^-8 cm/s, Moisture content 220%.Pollutant load：Cr 1464mg/kg, Cu 1088 mg/kg, Ni 1342mg/kg, Zn 344mg/kg；Back Scape value Cr 75mg/kg；Cu 31mg/kg；Ni 115mg/kg, Zn 221mg/kg.

Construction can store up site area 100m × 50m.Every layer of sludge thickness 1.2m amounts to 40 layers of heap.Using conducting polymer Pipe is netted, the commercially available anion-exchange membrane of yin, yang electrode difference housing and cation as electrode, diameter 2cm, tube wall tube wall Exchange membrane, outermost layer cover layer of geotextile.Electrode length 50m.Interval 25m draws a conducting wire on the electrode.Electrode gap 100cm；Voltage gradient between positive and negative electrode is 2.3V/cm.

Removal rate：Cr 60%, Cu 27%, Ni 66%, Zn 22%；

Construction method：

1, after smooth location, first layer is spread（Singular layer）Electrode.Electrode gap 1m.By extraction wire on every strip electrode, parallel connection is even It is connected to positive pole.Each electrode both ends of the electrode group are in charge of A with same water inlet respectively and same draining is in charge of A and is connect；

2, the sludge of paving design thickness is use up for the sludge collapsing for limiting place edge on four side of sludge in this layer of electrode group Head takes the cofferdam 1.5m high using the method base of well known earth bag, maintains the volume stability of sludge blanket；

3, the second layer is arranged on the sludge blanket（Even numbers layer）Electrode group, electrode gap 1m.By extraction wire on every strip electrode, and Connection is connected to the same pole of power supply.The adjacent electrode of this layer of electrode group connects the anode and cathode of power supply respectively.It will connect in the electrode group Each electrode both ends for connecing anode are in charge of A with same water inlet respectively and same draining is in charge of A and is connect.Cathode will be connected in the electrode group Each electrode both ends be in charge of negative A with same water inlet respectively and same draining is in charge of negative A and is connect；

4, pave 20cm sludge in this layer of electrode group.By first layer（Singular layer）A and the second layer are in charge of in the water inlet of electrode（Even numbers Layer）The water inlet manifold A that feed flow source A is led in A connection is in charge of in the water inlet of electrode；Negative A connection is in charge of in the water inlet of second layer electrode to supply The negative A in liquid source.It A is in charge of in the draining for the electrode group for connecting positive pole is connected to and lead to the main sewer A of liquid storage pool A；It will connection The draining of the electrode group of power cathode is in charge of negative A and is connected to the negative A of main sewer for leading to the negative A of liquid storage pool.Apply the voltage of design, Controlling the voltage gradient between positive and negative electrode is 2.3V/cm；Liquid in anode is made by water inlet manifold A instillation sodium hydroxide simultaneously PH=3.4 or so are kept, so that the liquid in cathode is kept pH=6.5 or so by water inlet manifold 0.5% acetic acid of negative A instillation.Two electrodes Liquid supply rate is that drainpipe water flow can be made to keep continuous thread.Start the dehydration of first layer sludge and clears the pollution off Process；

5, when first layer sludge dewatering is to when can support oneself and can bear upper layer sludge weight, earth bag is loaded with this layer of sludge Increase the cofferdam 1.2m on place all around weir；The approximately equivalent sub-layer layer-by-layer casting of point three thickness in second layer electrode group The sludge blanket thickness of thick slurry shape sludge extremely design；

6, after the completion of the casting of second layer sludge paves, by the step of 1 and method installs third layer electrode and water pipe；

7, pave 20cm sludge in this layer of electrode group.By third layer（Singular layer）The water inlet of electrode is in charge of A connection and leads to feed flow The water inlet manifold A of source A；It A is in charge of in draining is connected to and lead to the main sewer A of liquid storage pool A；Apply the voltage of design, control is just Voltage gradient between negative electrode is 2.3V/cm；Liquid in anode is set to keep pH by water inlet manifold A instillation sodium hydroxide simultaneously =3.4 or so.Liquid supply rate is that drainpipe water flow can be made to keep continuous thread.Start the dehydration of second layer sludge and clear Depollution object process；

8, when second layer sludge dewatering is to when can support oneself and can bear upper layer sludge weight, earth bag is loaded with this layer of sludge Increase the cofferdam 1.2m on place all around weir；The approximately equivalent sub-layer layer-by-layer casting of point three thickness in third layer electrode group The sludge blanket thickness of thick slurry shape sludge extremely design；

9, after the completion of the casting of third layer sludge paves, by the step of 3 and method installs the 4th layer of electrode and water pipe；

10, pave in the 4th layer of electrode group after 20cm sludge, apply the voltage of design to this layer of electrode, control positive and negative electrode it Between voltage gradient be 2.3V/cm；Liquid in anode is set to keep pH=3.4 left by water inlet manifold A instillation sodium hydroxide simultaneously The right side makes the liquid in cathode keep pH=6.5 or so by water inlet manifold 0.5% acetic acid of negative A instillation.Two electrode liquid supply rates are energy Drainpipe water flow is enough set to keep continuous thread.Start the dehydration of third layer sludge and the process that clears the pollution off；

11, above-mentioned 5 ~ 10 repetitive operation is pressed, until reaching the sludge number of plies of design.Advancing the speed for sludge blanket need to be with lower layer's sludge Drainage rates and gain in strength rate are coordinated, and are calculated and are determined based on test result by design.With appropriate net in top electrode group Soil covering, plays guard electrode.Each layer electrode is parallel to each other；The electrode of singular layer electrode group and even numbers layer electricity from bottom to top The electrode runs parallel of pole group is staggered 0.5m；

12, tests determined, after every layer of electrode is connected 14 days, with the attenuating of the water content in sludge, its bearing capacity can expire The sufficient subsequent sludge blanket that paves on it connects each pollutant concentration in 24 days sludge in every layer of electrode and reaches the final of design code Index can close this layer of power supply and water source, and remaining moisture drives discharge by the gravity for covering sludge thereon in sludge.Until most The water content and each pollutant concentration of high two layers of sludge reach design object, can close all power and feed flow source；It is covered upper Under sludge gravity, the water in sludge continues through the electrode that can be drained and is discharged through drainpipe, until the last layer electrode power off After 90 days, the water content of sludge reaches the final requirement of design, and the pollutant for completing whole sludge is removed and dehydration is constructed.

Embodiment two

The sludge by chemical plant emission sewage pollution that channel cleanout generates, moisture content 122%, pH=5.0, partial size<2μm 34.65%, 2 ~ 20 μm 51.31%,>20μm14.04%；Infiltration coefficient 1.1510^-7cm/s.Pollutant load：Cd 4.65mg/kg （0.86 mg/kg of available state）, 384.15 mg/kg of Pb（64.17 mg/kg of available state）, 66.24 mg/kg of Cu（Available state 6.73 mg/kg）, 245.28 mg/kg of Zn（98.24 mg/kg of available state）.

Construction can store up 50 × 30m of site area.Every layer of sludge thickness 1.0m amounts to 40 layers of heap.Using commercially available conducting polymer Object drain bar is spaced 15m on the electrode and draws a conducting wire as electrode.The electrode gap of each layer electrode is 1.0m.Positive negative electricity Voltage across poles gradient 1.5V/cm, power supply mode are intermittent power supply, power 15 minutes, rest 15 minutes.Certainly to anode injection Water injects 0.3M citric acid to cathode to control in cathode liquid in pH=7.0 or so.

Elimination effect：Cd 54.2%（Available state 97.5%）, Pb 36.4%（Available state 95.4%）, Cu 35.9%（Available state 98.3%）, Zn 61.7%（Available state 98.6%）.

Construction method：

1, after smooth location, first layer electrode is spread.By extraction wire on every strip electrode, it is connected in parallel in the same pole of power supply.Yin-yang Electrode is spaced.The both ends of cathode electrodes all in this layer of electrode are in charge of A with same water inlet respectively and A is in charge of in same draining Connection；Negative A is in charge of at the both ends of anode electrodes all in this layer of electrode with same water inlet respectively and same draining is in charge of negative A and is connected It connects；

2, the cofferdam 1.5m high is taken at place surrounding earth bag base, it is dirty in the thick slurry shape of this layer of electrode group upper design thickness Mud；

3, after the completion of first layer sludge paves, the cathode sets of first layer electrode are connect to the cathode of power supply, anode unit electrode is connect The anode of power supply.A is in charge of in the water inlet of this layer of electrode cathode group is connected to the water inlet manifold A towards feed flow source A simultaneously, by each layer The water inlet of electrode anode group is in charge of negative A and is connected to the negative A of water inlet manifold towards the negative A in feed flow source；By the draining of electrode cathode group point Pipe A is connected to the main sewer A for leading to liquid storage pool A；It negative A is in charge of in the draining of electrode anode group is connected to and lead to the negative A of liquid storage pool The negative A of main sewer.Apply the voltage of design, starts the dehydration and pollutant reset procedure of first layer sludge；

4, at the same time by the step of 1 and method continue on first layer sludge be arranged second layer electrode；Every layer of electrode group it is each Electrode is aligned one by one with other each layer electrodes, while each layer electrode in same vertical plane being made also to be the alternate row of anodic-cathodic Column；

5, when first layer sludge dewatering is to when can support oneself and can bear upper layer sludge weight, earth bag is loaded with this layer of sludge Increase the cofferdam 1.0m on place all around weir；The approximately equivalent sub-layer layer-by-layer casting of point three thickness in second layer electrode group The sludge blanket thickness of thick slurry shape sludge extremely design.Simultaneously to first layer electrode through water inlet manifold A to cathode instillation 0.3M citric acid, Catholyte is controlled in pH=7.0 or so；Suitable tap water is supplied through the negative A of water inlet manifold；Water is that can make drainpipe water Stream keeps continuous thread；

6, after the completion of the casting of second layer sludge paves, by the step of 3 and method installation second layer electrode and water pipe, apply and design Voltage.Start the dehydration and pollutant reset procedure of second layer sludge；

7,4 are repeated）~6）Identical step and method carries out each layer sludge thereon and paves the installation with electrode and water pipe, and dirty It contaminates object and removes work.Until reaching the sludge number of plies of design.10cm element soil is covered in top electrode group, plays the work of guard electrode With；

8, tests determined, after every layer of electrode is connected 20 days, with the discharge of moisture in sludge, it can support oneself and can hold By upper layer sludge weight, the upper layer sludge that paves can be poured.After every layer of electrode is connected 30 days, each pollutant concentration reaches in sludge To the final index of design code, this layer of power supply and water source can be closed, remaining moisture by covering the weight of sludge thereon in sludge Power drives discharge.Until the water content and each pollutant concentration of top sludge reach design object, all power can be closed With feed flow source；It is upper cover sludge gravity under, the water in sludge continues through the electrode that can be drained and is discharged through drainpipe, until most After later layer electrode power off 70 days, the water content of sludge reaches that design is final to be required, the pollutant for completing whole sludge remove and Dehydration construction.

Embodiment three

The sludge of certain engineering production process discharge is the fine grained mud based on clay mineral kaolinite, and moisture content 260% seeps Saturating coefficient is 1.1 × 10^-8cm/s；Pb²⁺Content 2000mg/kg, Zn²⁺Content 1100mg/kg.

Construction can store up site area 200m × 150m.Every layer of sludge thickness 1m amounts to 40 layers of heap.

The electrode gap of each layer electrode is 1.0m.Cathode uses stainless steel tube, and anode is the titanium with ru oxide coating Compo pipe；Electrode pipe diameter 1.6cm, tube wall are distributed along 30 ° of cross section, along the every 2cm of length directionϕThe hole 2mm；Each segment electrode length 50m is spaced 25m on the electrode and draws a conducting wire.Voltage gradient between positive and negative electrode is 2.5V/cm.

Removal rate： Zn²⁺=94%；And Pb²⁺43%。

Construction method：

1, after smooth location, first layer electrode is spread, plays place mat, covering 5cm sand to prevent sludge from entering electrode tube on the electrode.It will Extraction wire on every strip electrode is connected in parallel in the same pole of power supply.Each electrode both ends of the electrode group are divided with same water inlet respectively Connection is in charge of in pipe and same draining；

2, the cofferdam 1.2m high is done with plain soil in place surrounding, in the thick slurry shape sludge of this layer of electrode group upper design thickness；

3, second layer electrode group is arranged in the way of 1 on the sludge blanket.Each electrode of every layer of electrode group and other each layer electrodes It is aligned one by one；

4,20cm sludge slurry is first poured in second layer electrode group.The cathode that first layer electrode group is connect to power supply, by second layer electricity Pole group connects the anode of power supply.A is in charge of in first layer water inlet simultaneously and is connected to water inlet manifold A, the water inlet of second layer electrode is in charge of The negative A of negative A connection water inlet manifold；By the draining for the electrode group for connecting power cathode be in charge of A be connected to lead to liquid storage pool A draining it is total Pipe A；It negative A is in charge of in the draining for the electrode group for connecting positive pole is connected to and lead to the negative A of main sewer of the negative A of liquid storage pool；Apply The voltage of design；Controlling the voltage gradient between positive and negative electrode is 2.5V/cm.Dehydration and the pollutant for starting first layer sludge are clear Except process；

5, when the water content in first layer sludge drop to its bearing capacity can satisfy pave the second layer sludge after（Water content decline Index or bearing capacity index according to test by design determine）, increase 1.0m on the surrounding element earth cofferdam of place with this layer of sludge Cofferdam；The remaining sludge slurry of the sub-layer layer-by-layer casting second layer for dividing three thickness approximately equivalent.It is in charge of A through first layer water inlet simultaneously Water inlet with second layer electrode is in charge of negative A and supplies suitable tap water, analyzes through the measurement to discharge liquor, and drainpipe is kept to have company Continuous thread can meet design requirement；

6, the step of pressing 1 and method, are laid with third layer electrode and water pipe on second layer sludge；

7,20cm sludge is first poured in third layer electrode group.When pollutant concentration each in first layer sludge reaches design code Final index, and the water content in sludge drops to after its bearing capacity can satisfy and pave subsequent sludge blanket on it（Water content The index or bearing capacity index of decline are determined by test）, power supply and the feed flow source of first layer and second layer electrode can be closed.It is dirty Remaining moisture drives discharge by the gravity for covering sludge thereon in mud.By the cathode of second layer electrode group reconfiguration power supply, by third Layer electrode group connects the anode of power supply.A correspondingly is in charge of in the water inlet of second layer electrode and is connected to water inlet manifold A, A is in charge of in draining It is connected to main sewer A；Negative A is in charge of in the water inlet of third layer electrode group and is connected to the negative A of water inlet manifold, negative A connection is in charge of in draining In the negative A of main sewer.Apply the voltage of design；Start the dehydration of second layer sludge and the process that clears the pollution off；

8,5 ~ 7 identical steps and method repetitive operation are pressed, the installation steps that each layer sludge paves with electrode, water pipe thereon are carried out And pollutant is removed and dewatering work.Until the water content and each pollutant concentration of top sludge reach design object, i.e., All power and feed flow source can be closed；It is upper cover sludge gravity under, force the water in sludge to continue through the electricity that can be drained Pole is discharged through drainpipe, until the moisture content of sludge reaches design requirement, the pollutant for completing whole sludge is removed and dehydration is applied Work；

9, tests determined, after every layer of electrode is connected 23 days, with the discharge of moisture in sludge, it can support oneself and can hold By upper layer sludge weight, the upper layer sludge that paves can be poured.After every layer of electrode is connected 42 days, each target ion concentration in sludge The final index for reaching design code, can close this layer of power supply and water source.Remaining moisture by covering sludge thereon in sludge Gravity drives discharge.Until the water content and each pollutant concentration of top sludge reach design object, whole electricity can be closed Source and feed flow source；It is upper cover sludge gravity under, the water in sludge continues through the electrode that can be drained and is discharged through drainpipe, until After the last layer electrode power off 90 days, the water content of sludge reaches the final requirement of design, and the pollutant for completing whole sludge is removed It constructs with dehydration.

Example IV

Sludge is that kaolin is main pH6.3, density 1.27g/cm³, 5.22 cmol/kg of cation exchange capacity, infiltration coefficient 1.0510^-7cm/s；Moisture content 96.4%.Cd 441.23mg/kg（243.66 mg/kg of available state）.

Construction can store up site area 120m × 300m.Every layer of sludge thickness 1.2m amounts to 50 layers of heap.Anode is：Diameter 1cm The PVC water pipe of Carbon Fiber Cables housing diameter 2cm, tube wall along 30 ° of cross section, along length direction interval 2cm distribution 5mm × 100mm it is narrow Long hole, outermost layer packet layer of non-woven fabric.Cathode is the PVC water pipe of the cm of 1.0cm × 0.5 stainless steel strip housing diameter 2cm, tube wall 5mm × 100mm long and narrow hole, outermost layer packet layer of non-woven fabric are distributed along 30 ° of cross section, along length direction interval 2cm.Between on the electrode A conducting wire is drawn every 25m.The electrode gap of every layer of electrode is 1.0m.Power supply mode is intermittent power supply, powers 30 minutes, stops It has a rest 30 minutes；Voltage gradient between positive and negative electrode is 1.0V/cm.The instillation 0.01M EDTA into catholyte stablizes it PH=8.0 or so；The instillation 0.01M sodium hydroxide in anolyte stablizes it in PH=6.5 or so.

Elimination effect：The full state 87% of Cd, Cd available state 99%.

Construction method：

1, after smooth location, first layer electrode is spread.By extraction wire on every strip electrode, it is connected in parallel in the same pole of power supply.It should Each electrode both ends of electrode group are in charge of to be in charge of with same draining with same water inlet respectively to be connect.The caliber of water inlet pipe and drainpipe is straight Diameter 2cm；

2, the method that earth bag is stacked with well known to using in place surrounding constructs the cofferdam 1.5m；The paving design in this layer of electrode group The sludge of thickness；

3, second layer electrode group is arranged in the way of 1 on the sludge blanket.Each electrode of every layer of electrode group and other each layer electrodes It is aligned one by one；

4,20cm sludge is first poured in second layer electrode group.The cathode that first layer electrode group is connect to power supply, by second layer electrode Group connects the anode of power supply.A is in charge of in first layer water inlet simultaneously and is connected to water inlet manifold A, negative A is in charge of in the water inlet of second layer electrode Connect the negative A of water inlet manifold；It A is in charge of in the draining for the electrode group for connecting power cathode is connected to and lead to the main sewer of liquid storage pool A A；It negative A is in charge of in the draining for the electrode group for connecting positive pole is connected to and lead to the negative A of main sewer of the negative A of liquid storage pool；Application is set The voltage of meter；Controlling the voltage gradient between positive and negative electrode is 1.0V/cm.The dehydration and pollutant for starting first layer sludge are removed Process；

5, when the water content in first layer sludge drop to its bearing capacity can satisfy pave the second layer sludge after（Water content decline Index or bearing capacity index according to test by design determine）, 1.2m will be increased on the sub- cofferdam of earth bag；Divide three thickness about phase Deng the remaining sludge of the sub-layer layer-by-layer casting second layer.It is in charge of A through first layer water inlet simultaneously to instil into catholyte 0.01M EDTA stablizes it in pH=8.0 or so；Negative A instillation 0.01M hydroxide into anolyte is in charge of in water inlet through second layer electrode Sodium stablizes it in PH=6.5 or so.Through the measurement analysis to discharge liquor, liquid supply rate is to keep drainpipe to have continuous thread Meet design requirement；

6, the step of pressing 1 and method, are laid with third layer electrode and water pipe on second layer sludge.Each electrode of every layer of electrode group with Other each layer electrodes are aligned one by one；

7,20cm sludge slurry is first poured in third layer electrode group.Third layer electrode group is connect to the cathode of power supply.Simultaneously by third Layer water inlet is in charge of A and is connected to water inlet manifold A；It A is in charge of in the draining for connecting the electrode group of power cathode is connected to and lead to liquid storage pool A Main sewer A；Apply the voltage of design；Controlling the voltage gradient between positive and negative electrode is 1.0V/cm.Start second layer sludge Dehydration and pollutant reset procedure；

8, when the water content in second layer sludge drop to its bearing capacity can satisfy pave third layer sludge after（Water content decline Index or bearing capacity index according to test by design determine）, 1.2m will be increased on the sub- cofferdam of earth bag；Divide three thickness about phase Deng the remaining sludge of sub-layer layer-by-layer casting third layer.It is in charge of A through third layer water inlet simultaneously to instil into catholyte 0.01M EDTA stablizes it in pH=8.0 or so.Through the measurement analysis to discharge liquor, liquid supply rate is to keep drainpipe to have continuous thread i.e. Design requirement can be met；

9, the step of pressing 1 and method, are laid with the 4th layer of electrode and water pipe on third layer sludge.Each electrode of every layer of electrode group with Other each layer electrodes are aligned one by one；

10,20cm sludge slurry is first poured in the 4th layer of electrode group.4th layer of electrode group is connect to the anode of power supply.Simultaneously by the 4th Layer water inlet is in charge of A and is connected to the negative A of water inlet manifold；It negative A is in charge of in the draining for connecting the electrode group of positive pole is connected to and lead to storage The negative A of main sewer of the negative A of liquid pool；Apply the voltage of design；Controlling the voltage gradient between positive and negative electrode is 1.0V/cm.Start The dehydration and pollutant reset procedure of third layer sludge；

11, when the water content in third layer sludge drop to its bearing capacity can satisfy pave the 4th layer of sludge after（Under water content The index or bearing capacity index of drop are determined according to test by design）, 1.2m will be increased on the sub- cofferdam of earth bag；Divide three thickness about Equal the 4th layer of remaining sludge of sub-layer layer-by-layer casting.Water inlet through the 4th layer of electrode simultaneously is in charge of negative A and is dripped into anolyte 0.01M sodium hydroxide is infused, stablizes it in PH=6.5 or so.Through the measurement analysis to discharge liquor, liquid supply rate is to keep drainpipe There is continuous thread that can meet design requirement；

12, above-mentioned 6 ~ 11 identical steps and method repetitive operation are pressed, the peace that each layer sludge paves with electrode, water pipe thereon is carried out It fills step and pollutant is removed and dewatering work.Until the water content and each pollutant concentration of top sludge reach design mesh Mark, can close all power and feed flow source；It is upper cover sludge gravity under, forcing the water in sludge to continue through can drain Electrode be discharged through drainpipe, until the moisture content of sludge reaches design requirement, the pollutant for completing whole sludge is removed and de- Water construction；

13, tests determined, after every layer of electrode is connected 18 days, with the discharge of moisture in sludge, it can support oneself and can be with Upper layer sludge weight is born, the upper layer sludge that paves can be poured.After every layer of electrode is connected 40 days, each object ion is dense in sludge Degree reaches the final index of design code, can close this layer of power supply and water source.Remaining moisture by covering sludge thereon in sludge Gravity drive discharge.Until the water content and each pollutant concentration of top sludge reach design object, whole can be closed Power supply and feed flow source；It is upper cover sludge gravity under, the water in sludge continues through the electrode that can be drained and is discharged through drainpipe, To after the last layer electrode power off 80 days, the water content of sludge reaches the final requirement of design, and the pollutant for completing whole sludge is clear Remove and be dehydrated construction.

Embodiment five

One Organic Chemical Plant's sludge, moisture content 86.5%, infiltration coefficient 1 × 10^-6cm/s；PH=10, pollutant are factory production A kind of distinctive organic solvent, specific ingredient is unknown, water-soluble；Pollutant concentration 8mg/kg.

Construction can store up site area 80m × 60m.Every layer of sludge thickness 1.2m amounts to 32 layers of heap.Electrode is diameter 1cm's Conducting polymer housing diameter 2cm pvc pipe, tube wall are distributed along 20 ° of cross section, along length direction 3cmϕ2 holes, electrode length 60m.Interval 20m draws a conducting wire on the electrode.Electrode gap 100cm；Voltage gradient between positive and negative electrode is 3V/cm； Power supply mode is intermittent power supply, powers 25 minutes, rests 25 minutes.Limewash is injected to anode, keeps anolyte pH=10； Tap water is injected to cathode.

Construction method：

1, after smooth location, first layer electrode, electrode gap 1.0m are spread；Layer of sand is as filter after playing place mat, covering 5cm on the electrode Layer, to prevent fine grained in sludge from entering electrode tube.A conducting wire is drawn by 20m is spaced on every strip electrode, is connected in parallel in electricity The same pole in source.Each electrode both ends of the electrode group are in charge of to be in charge of with same draining with same water inlet respectively and are connect；

2, the cofferdam 1.5m high is done with plain soil in place surrounding, on the electrode layer the sludge of paving design thickness 1.2m；

3, second layer electrode group is laid with by 1 method on the sludge blanket.Second layer electrode compares first layer electrode in vertical electricity Pole length direction translates 0.6m；

4,20cm sludge is first poured in second layer electrode group.The cathode that first layer electrode group is connect to power supply, by second layer electrode Group connects the anode of power supply.A is in charge of in first layer water inlet simultaneously and is connected to water inlet manifold A, negative A is in charge of in the water inlet of second layer electrode Connect the negative A of water inlet manifold；It A is in charge of in the draining for the electrode group for connecting power cathode is connected to and lead to the main sewer of liquid storage pool A A；It negative A is in charge of in the draining for the electrode group for connecting positive pole is connected to and lead to the negative A of main sewer of the negative A of liquid storage pool；Application is set The voltage of meter；Controlling the voltage gradient between positive and negative electrode is 3V/cm.The dehydration and pollutant for starting first layer sludge were removed Journey；

5, when the water content in first layer sludge drop to its bearing capacity can satisfy pave the second layer sludge after（Water content decline Index or bearing capacity index according to test by design determine）, increase 1.2m on the surrounding element earth cofferdam of place with this layer of sludge Cofferdam；The remaining sludge of the sub-layer layer-by-layer casting second layer for dividing three thickness approximately equivalent.It is in charge of A through first layer water inlet simultaneously to supply To suitable tap water, the water inlet through second layer electrode is in charge of negative A and injects limewash to anode, keeps anolyte pH=10；Through pair The measurement of discharge liquor is analyzed, and drainpipe is kept to have continuous thread that can meet design requirement；

6, the step of pressing 1 and method, are laid with third layer electrode and water pipe on second layer sludge；

7,20cm sludge is first poured in third layer electrode group.When pollutant concentration each in first layer sludge reaches design code Final index, and the water content in sludge drops to after its bearing capacity can satisfy and pave subsequent sludge blanket on it（Water content The index or bearing capacity index of decline are determined by test）, power supply and the feed flow source of first layer and second layer electrode can be closed.It is dirty Remaining moisture drives discharge by the gravity for covering sludge thereon in mud.By the cathode of second layer electrode group reconfiguration power supply, by third Layer electrode group connects the anode of power supply.A correspondingly is in charge of in the water inlet of second layer electrode and is connected to water inlet manifold A, A is in charge of in draining It is connected to main sewer A；Negative A is in charge of in the water inlet of third layer electrode group and is connected to the negative A of water inlet manifold, negative A connection is in charge of in draining In the negative A of main sewer.Apply the voltage of design；Start the dehydration of second layer sludge and the process that clears the pollution off；

8,5 ~ 7 identical steps and method repetitive operation are pressed, the installation steps that each layer sludge paves with electrode, water pipe thereon are carried out And pollutant is removed and dewatering work.Until the water content and each pollutant concentration of top sludge reach design object, i.e., All power and feed flow source can be closed；It is upper cover sludge gravity under, force the water in sludge to continue through the electricity that can be drained Pole is discharged through drainpipe, until the water content of sludge reaches design and finally requires, the pollutant for completing whole sludge is removed and taken off Water construction；

9, tests determined, after every layer of electrode is connected 13 days, with the discharge of moisture in sludge, it can support oneself and can hold By upper layer sludge weight, the upper layer sludge that paves can be poured.After every layer of electrode is connected 32 days, pollutant concentration reaches in sludge The final index of design code, can close this layer of power supply and water source.Remaining moisture by covering the gravity of sludge thereon in sludge Drive discharge.Until top sludge water content and each pollutant concentration reach design object, can close all power and Feed flow source；It is upper cover sludge gravity under, the water in sludge continues through the electrode that can be drained and is discharged through drainpipe, until last One layer after electrode power off 60 days, the water content of sludge reaches design requirement, and the pollutant for completing whole sludge is removed and dehydration is applied Work.

The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain Lid is within protection scope of the present invention.Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. a kind of sludge dewatering decontaminates combined governance method, it is characterized in that：Include the following steps：It incites somebody to action not only electrically conductive but also can lead to Pipe or band electrode the horizontal direction arrangement of water, the electrode group and one that will be made of one group of electrode that is parallel, arranging at regular intervals The sludge blanket for determining thickness alternate stacks；In the plane perpendicular to electrode, to any one electrode, in the electrode around the electrode In at least one the connect DC power supply of electrode polarity it is opposite with the polarity of the connect DC power supply of the electrode；Applied by electrode Direct current generates electric field in sludge, while injecting liquid appropriate by the water-filled pipe of electrode, to regulate and control the change in sludge Learn reaction environment；Under electric field action, pollutant contained in sludge is to electrode transfer, and the water-filled pipe by liquid through electrode It takes out of, to realize the removing of pollutant in sludge；The moisture in sludge is to electrode transfer and from the water-filled pipe of electrode simultaneously Discharge, furthermore it is upper cover gravity under the action of, the water in sludge is pressed further by electrode, from the water-filled pipe of electrode and is arranged Out.

2. according to the method described in claim 1, it is characterized in that：Electrode is one of following five kinds of configurations：

The pipe being made of an electrically conducting material, tube wall have water-permeable aperture by the interval of design and aperture；

It is constituted in conductive material wire rod housing water pipe, wherein water pipe tube wall is by the interval and aperture of design with water-permeable small Hole；

1）Or 2）Outsourcing filtering layer is constituted again on the basis of the configuration；

Conductive plastics drain bar；

It is further added by a leafing proton exchange on the basis of 1 or 2 or 3 or 4 configuration and constitutes；

Wherein, the conductive material is：Carbon fiber, corrosion-resistant metal materials, graphite, conducting polymer, by carbon fiber, metal, The electric conductor of the compound composition of one or more and polymer of graphite；The water pipe is non-conductive water pipe, including plastic tube, is not led The pipe that electric fibrous material is woven into is able to maintain the pipe or the unfixed pipe of cross sectional shape of specific cross-sectional shape；The filtering layer is Permeable flexible material, including non-woven fabrics, the cloth that the cloth or chemical fibre that plant fiber is made into are made into；The amberplex packet Include the amberplex of anionic or cationic or amphoteric ion type；The electrode all using same electrode, or The electrode for connecing DC power anode uses a kind of electrode, connects the electrode of direct current cathode using another electrode.

3. the method according to claim 1, wherein the sludge is permeability lower than 10^-4Thin of cm/s Grain is in fluidised form or the sludge for flowing plastic state；Contained pollutant is the one or more of following substance：Gasoline, diesel oil, the polycyclic virtue of PAH Fragrant hydrocarbon, pyrene, carbolic acid, pentachlorophenol, petroleum hydrocarbon, phenanthrene, TCE trichloro ethylene, pentadecane binary acid, PEC haloflex, Dyestuff, hexachlorobutadiene, BTEX benzene homologues, lead, chromium, cadmium, cobalt, caesium, copper, mercury, nickel, magnesium, molybdenum, zinc, uranium, thorium, radium, strontium, antimony, with And halide, arsenic, phosphorus, phosphate, nitrate, fluorine.

4. the method according to claim 1, wherein the liquid includes fresh water or fresh water and a kind of following substance Or the solution that many kinds of substance is constituted：The organic acids such as acetic acid, citric acid, hydrochloric acid, sulfuric acid, sodium hydroxide, calcium hydroxide, ammonia, little Su It beats, SDS lauryl sodium sulfate, DAH dodecyl hypochlorous acid ammonia and Bril30 polyethylene glycol oxide or hydroxy propyl-Beta-ring paste Essence, ammonium hydroxide, EDTA, NTA, EGTA, DTPA, DCyTA.

5. the method according to claim 1, wherein further comprising the steps：

It will design and determine length, interval sum number purpose electrode horizontal direction parallel arrangement, one layer of electrode group is formed, on every electrode Appropriate intervals extraction wire, be connected in parallel in the same pole of power supply；The same polar each electrode of power supply will be connect in the electrode group Both ends are in charge of to be in charge of with same draining with same water inlet respectively to be connect；

The sludge of paving design thickness in this layer of electrode group, the sludge end carry out supporting and retaining system；

Press 1 again on the sludge blanket）Mode arrange one layer of electrode group, the electrode of this layer of electrode group and other each layer electrode groups Electrode is parallel to each other；

2 are pressed in this layer of electrode group）Mode paving design thickness again sludge；

By above-mentioned 1）~4）Repetitive operation, carries out the installation of each layer sludge thereon to pave with electrode, water pipe, until reaching design The sludge number of plies；Advancing the speed for sludge blanket need to be coordinated with lower layer's sludge drainage rates and gain in strength rate, wherein top It is covered in electrode group with the appropriate pure land, plays guard electrode.

6. according to claim 1 with the method described in claim 5, which is characterized in that each layer electrode group connection electric power polarity Arrangement mode is one of following four：

1）Electrode A 1 connects：Singular layer electrode group connects the same polarity of power supply, and even numbers layer electrode group connects the opposite polarity of power supply；

2）Electrode A 2 connects：Singular layer electrode group connects the same polarity of power supply, and the adjacent electrode difference in even numbers layer electrode group Connect the opposite polarity of power supply；

3）Electrode B connection：During being dehydrated and clearing the pollution off, the lower electrode group of every layer of sludge all connects the same of power supply Polarity, and the upper electrode group of every layer of sludge all connects the opposite polarity of power supply；

4）Electrode C connection：The adjacent electrode of each layer of electrode group connects the anode and cathode of power supply respectively, and each layer electrode group is vertical Adjacent electrode in same plane is also the anode and cathode for connecing power supply respectively.

7. according to claim 1 and method of claim 6, which is characterized in that the arrangement of electrode group connection electric power polarity Mode is different, determines different sequences of construction,

When the connection of electrode A 1 or A2 connection, sequence of construction is as follows：

After the completion of third layer sludge paves, first layer electrode group and third layer electrode group are connect to a certain pole of power supply（Call A in the following text Pole）；Electrode A 1 is connected, second layer electrode group is connect to the opposite pole of power supply（Call the negative pole A in the following text）；Electrode A 2 is connected, by second Layer electrode group adjacent electrode connects the pole A and the negative pole A of power supply respectively；Simultaneously by the water inlet point of the electrode group of each layer connection pole power supply A Pipe（It calls in the following text into water and is in charge of A）Be connected to the water inlet manifold A for leading to feed flow source A, by each layer connection the negative pole A of power supply electrode group into Moisture pipe（It calls in the following text into water and is in charge of negative A）It is connected to the negative A of water inlet manifold for leading to the negative A in feed flow source；The electrode group of the pole power supply A will be connected Draining be in charge of（It calls draining in the following text and is in charge of A）It is connected to the main sewer A for leading to liquid storage pool A；The electrode group of the negative pole A of power supply will be connected Draining be in charge of（It calls draining in the following text and is in charge of negative A）It is connected to the negative A of main sewer for leading to the negative A of liquid storage pool；Apply the voltage of design；Together When be in charge of A through water inlet respectively and water inlet is in charge of negative A and supplies suitable particular liquid；Start the dehydration of first layer and second layer sludge With the process of clearing the pollution off；

Continue the 4th layer of setting and layer 5 sludge and the 4th layer and layer 5 electrode at the same time；

After the completion of layer 5 sludge paves, layer 5 electrode group is connect to the pole A of power supply, the 4th layer of electrode group is connect into the negative of power supply The pole A（Electrode A 1 connects）Or adjacent electrode is connect to the pole A and the negative pole A of power supply respectively（Electrode A 2 connects）；Each layer is intake simultaneously It is in charge of A and is connected to water inlet manifold A, negative A is in charge of in the water inlet of each layer and is connected to the negative A of water inlet manifold；A is in charge of in draining and is connected to draining General pipeline A；Negative A is in charge of in draining and is connected to the negative A of main sewer；Apply the voltage of design；It is in charge of A and water inlet through water inlet respectively simultaneously It is in charge of negative A and supplies suitable particular liquid；Start the process that clears the pollution off of third layer and the 4th layer of sludge；

By 2）With 3）Identical step repetitive operation, one group of successive of every two layers of sludge complete paving and electrode and water for each layer sludge The installation steps of pipe, and dehydration and the work that clears the pollution off；

It with the discharge of moisture and pollutant in each layer sludge, can satisfy its bearing capacity when the water content in sludge drops to Thereon after the paving of one layer of sludge, subsequent sludge blanket can be carried out and paved；When pollutant concentration each in sludge reaches design code Index and water content drop to after so that its bearing capacity is can satisfy and is paved subsequent sludge blanket thereon, can successive close power supply and Feed flow source, until two layers of sludge of highest reaches design object；

It is upper cover sludge gravity under, the water in sludge continues through the electrode that can be drained and is discharged through drainpipe, until sludge Water content reach that design is final to be required, the pollutant for completing whole sludge is removed and dehydration construction；；

When electrode B connection, sequence of construction is as follows：

After the completion of second layer sludge paves, first layer electrode group is connect to the pole A of power supply, second layer electrode group is connect into the negative of power supply The pole A；A is in charge of in water inlet is connected to water inlet manifold A simultaneously, and the negative A of negative A connection water inlet manifold is in charge of in water inlet；A is in charge of in draining to connect It is connected to main sewer A；Negative A is in charge of in draining and is connected to the negative A of main sewer；Apply the voltage of design；Simultaneously through water inlet be in charge of A and Water inlet is in charge of negative A and supplies suitable particular liquid；Start the dehydration and pollutant reset procedure of first layer sludge；

Continue that third layer electrode is arranged at the same time；Its bearing capacity is set to can satisfy it when the water content of first layer sludge drops to After the paving of upper one layer of sludge, paving for third layer sludge can be carried out；

After the completion of third layer sludge paves, and the water content in first layer sludge drops to and can satisfy its bearing capacity thereon After pave subsequent sludge blanket, and each pollutant concentration reaches the index of design, the power supply of first layer and second layer electrode is closed With feed flow source；By the pole A of second layer electrode group reconfiguration power supply, third layer electrode group is connect to the negative pole A of power supply, it correspondingly will water inlet It is in charge of A and is connected to water inlet manifold A, negative A is in charge of in water inlet and is connected to the negative A of water inlet manifold；A is in charge of in draining and is connected to main sewer A；Negative A is in charge of in draining and is connected to the negative A of main sewer；Apply the voltage of design；It is in charge of A through water inlet simultaneously and negative A is in charge of in water inlet Supply suitable particular liquid；Start the dehydration of second layer sludge and the process that clears the pollution off；

Repeat 2）With 3）Identical step and method, complete thereon each layer sludge pave with electrode, water pipe installation steps and Pollutant is removed and dewatering work；Until the water content of top sludge and each target ion concentration reach design object Close all power and feed flow source；

It is upper cover sludge gravity under, the water in sludge continues through the electrode that can be drained and is discharged through drainpipe, until sludge Water content reach design requirement, the pollutant for completing whole sludge is removed and dehydration construction；

When electrode C connection, sequence of construction is as follows：

1）After the completion of first layer sludge paves, the cathode sets of first layer electrode are connect to the cathode of power supply, anode unit electrode is connect The anode of power supply；A is in charge of in the water inlet of each layer connection cathode simultaneously and is connected to water inlet manifold A, the water inlet of jointed anode is in charge of Negative A is connected to the negative A of water inlet manifold；A is in charge of in the draining for being connected to cathode and is connected to main sewer A；The row of anode will be connected to The negative A of moisture pipe is connected to the negative A of main sewer；Apply the voltage of design；It is in charge of A through water inlet simultaneously and water inlet is in charge of negative A supply and is fitted The particular liquid of amount；Start the dehydration of first layer sludge and the process that clears the pollution off；

2）1 is pressed at the same time）The step of and method continue be arranged second layer electrode and water pipe installation；Each electricity of every layer of electrode group Pole is aligned one by one with other each layer electrodes, while each layer electrode in same vertical plane being made also to be the alternate row of anodic-cathodic Column；

3）When the water content in first layer sludge drop to its bearing capacity can satisfy pave subsequent sludge blanket on it after, The sludge of two layers of electrode group upper design thickness；

4）After the completion of the casting of second layer sludge paves, apply the voltage of design to second layer electrode；Simultaneously through water inlet be in charge of A and Water inlet is in charge of negative A and supplies suitable particular liquid；Start the dehydration of second layer sludge and the process that clears the pollution off；

5）Repeat 2）~ 4）Identical step and method completes each layer sludge thereon and paves and electrode, the installation of water pipe and clear Depollution object and dewatering work；

6）With the discharge of moisture content and pollutant in each layer sludge, expire its bearing capacity when the water content in sludge drops to It, can successive after foot paves subsequent sludge blanket thereon, and each target ion concentration reaches the final index of design code in sludge Close power supply and feed flow source；Until the water content of top sludge and each target ion concentration reach design object, can close All power and feed flow source；

7）It is upper cover sludge gravity under, the water in sludge continues through the electrode that can be drained and is discharged through drainpipe, until dirty The water content of mud reaches the final requirement of design, and the pollutant for completing whole sludge is removed and dehydration is constructed.

8. according to claim 1 and method of claim 7, which is characterized in that voltage is 40V ~ 400V, positive and negative pole tension Gradient is 0.3V/cm ~ 4V/cm；The voltage applied is the voltage of continual and steady voltage or intermittent entry, according to dirt Mud physicochemical properties are determined through field test by design.

9. according to claim 1 and method of claim 7, it is characterised in that：Electrode gap and sludge with a thickness of 0.5m ~ 3m, upper layer and lower layer electrode vertical non-alignment or is misaligned, and each segment length of electrode is physico according to sludge between 10m ~ 500m It learns property and is determined through field test by design.

10. according to according to claim 1, according to claim 4 and method of claim 7, it is characterised in that：The confession The ingredient of the liquid of liquid pipe injection is fresh water, or can pass through acid-base neutralization or complex reaction or chelatropic reaction or desorption Reaction forms the liquid of desired ingredient；Liquid component and quantity are true by designing through field test according to sludge physicochemical properties It is fixed.