CN207483528U - Garbage percolation liquid treating system - Google Patents

Garbage percolation liquid treating system Download PDF

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Publication number
CN207483528U
CN207483528U CN201721500060.5U CN201721500060U CN207483528U CN 207483528 U CN207483528 U CN 207483528U CN 201721500060 U CN201721500060 U CN 201721500060U CN 207483528 U CN207483528 U CN 207483528U
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electrodialysis
filter
concentrated water
water
liquid treating
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张泉
兰建伟
赵剑锋
徐文军
江晶
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SHENZHEN ENERGY RESOURCE COMPREHENSIVE DEVELOPMENT Co Ltd
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SHENZHEN ENERGY RESOURCE COMPREHENSIVE DEVELOPMENT Co Ltd
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Abstract

The utility model discloses a kind of garbage percolation liquid treating system, including landfill leachate is pre-processed pretreatment pool, the clarified solution obtained will be pre-processed be filtered the filter of processing, the filter liquor obtained will be filtered carry out the electrodialysis plant of electrodialysis process, the electrodialysis fresh water that electrodialysis obtains be subjected to the biochemical treatment apparatus of biochemical treatment and membrane filtration processing successively and film filter and the membrane filtration concentrated water and the electrodialysis concentrated water of electrodialysis acquisition that obtain membrane filtration processing are evaporated the evaporator of crystallization treatment;The pretreatment tank, filter, electrodialysis plant, biochemical treatment apparatus, film filter and evaporator are sequentially connected.The utility model be combined by pretreatment+filtering+electrodialysis+biochemistry+evaporative crystallization landfill leachate is concentrated, the processing such as separation of solid and liquid, obtain recycling crystal salt and recycle-water, realize wastewater zero discharge and resource reutilization, it is environmentally friendly, it is with a wide range of applications.

Description

Garbage percolation liquid treating system
Technical field
The utility model is related to technical field of waste water processing more particularly to a kind of realization zero-emission and crystal salt recycling profits Garbage percolation liquid treating system.
Background technology
Now with the raising of discharging standards, landfill leachate zero discharge treatment also gradually spreads out implementation.It is existing Landfill leachate Zero-discharge treating process generally comprise anaerobic digestion (reduce organic concentration), biochemical treatment (removal ammonia nitrogen), Film thickening filtration (with various types of films, carry out concentration, obtain concentrate with high salt) and evaporating, concentrating and crystallizing processing, crystallization Concentrate afterwards carries out separation of solid and liquid with crystal grain, and mother liquor returns to liquid pool or continues evaporative crystallization, and it is dry that crystal carries out dehydration It is dry, it finally obtains purified water and meets the product salt of industrial salt standard.The characteristics of above-mentioned technique, is:Pass through biochemical treatment Journey organics removal and ammonia nitrogen by pollutants such as membrane filtration processes heavy-metal ion removal, hardness, silicon ions, pass through evaporation Salinity based on sodium chloride and potassium chloride is converted into solid by crystallization, and discharge is detached from waste water, reaches following effect:Make to give up Water qualified discharge realizes the recycling of waste water.
However, above-mentioned technique has the following disadvantages:(1) realizing the biochemical system of biochemical treatment has clearly water inlet salinity It is required that for high saliferous landfill leachate, biochemical system cannot be effectively treated so that waste water treatment system cannot be transported steadily in the long term Row;The methods of passing through dilution, which reduces biochemical water inlet salt content, can then greatly improve the operating cost of subsequent technique.(2) reverse osmosis membrane Concentration systems operating pressure is high, salt content (TDS) can only be concentrated into 50000mg/L or so, the rate of recovery of water is low, and energy consumption is big. (3) COD removal efficiency is low, and organic matter is contained in vaporizing raw liquor, influences product salt quality
Utility model content
The technical problem to be solved by the present invention is to provide a kind of zero-emission and crystal salt recycling realized Garbage percolation liquid treating system.
Technical solution is used by the utility model solves its technical problem:A kind of landfill leachate treatment system is provided System, including landfill leachate is pre-processed pretreatment pool, the clarified solution obtained will be pre-processed be filtered the mistake of processing Filter will filter the electrodialysis plant of filter liquor progress electrodialysis process obtained, is successively that the electrodialysis of electrodialysis acquisition is light The biochemical treatment apparatus and film filter of water progress biochemical treatment and membrane filtration processing and the film for obtaining membrane filtration processing The electrodialysis concentrated water that filtering concentrated water and electrodialysis obtain is evaporated the evaporator of crystallization treatment;
The pretreatment tank, filter, electrodialysis plant, biochemical treatment apparatus, film filter and evaporator are successively Connection.
Preferably, the garbage percolation liquid treating system further includes reuse tank;
The evaporator connects the reuse tank, and the recycle-water that evaporative crystallization processing obtains is back to the reuse tank.
Preferably, the film filter connects the reuse tank, and membrane filtration production water is delivered to the reuse tank.
Preferably, the filter is tubular type membrane filter.
Preferably, the electrodialysis plant includes homogeneous membrane electric dialyzator.
Preferably, the biochemical treatment apparatus is me.mbrane bioreactor, including the de-nitrification unit to connect and denitrification unit.
Preferably, the garbage percolation liquid treating system further includes pH regulating reservoirs;The pH regulating reservoirs are connected to described pre- Between processing pond and filter or it is connected between the filter and electrodialysis plant.
Preferably, electrodialysis plant tool is there are two exporting, and respectively exports the first outlet of electrodialysis concentrated water and defeated Go out the second outlet of electrodialysis fresh water;
The garbage percolation liquid treating system further includes electrodialysis concentrated water pond and electrodialysis fresh water pond;The electrodialysis concentrated water Pond is connect with the first outlet, and the electrodialysis fresh water pond is connect with the second outlet.
Preferably, the electrodialysis concentrated water pond is also connected with oxidation filter device, electrodialysis concentrated water is carried out at oxidation filtering Reason.
Preferably, the garbage percolation liquid treating system further includes evaporation former pond;The import point of the evaporation former pond The electrodialysis plant and film filter are not connected, receive electrodialysis concentrated water from the electrodialysis plant and from described The membrane filtration concentrated water of film filter;The outlet of the evaporation former pond connects the evaporator, by the electrodialysis concentrated water of reception The evaporator is delivered to membrane filtration concentrated water.
The beneficial effects of the utility model:The technique being combined by pretreatment+filtering+electrodialysis+biochemistry+evaporative crystallization Landfill leachate is concentrated, the processing such as separation of solid and liquid, obtain recycling crystal salt and recycle-water, realize waste water zero-emission It puts and resource reutilization, it is environmentally friendly, it is with a wide range of applications.
It in garbage percolation liquid treating system, is combined using electrodialysis+biochemical process, reduces biochemical water inlet salinity, no Increase the processing water of biochemical treatment, the stability of biochemical treatment operation is improved, at the salt for reducing biochemical treatment on the whole Manage load;Increase the raw water salinity into evaporator, improve evaporation efficiency, reduce Load Evaporator and overall operation into This.
Description of the drawings
Below in conjunction with accompanying drawings and embodiments, the utility model is described in further detail, in attached drawing:
Fig. 1 is the structure diagram of the garbage percolation liquid treating system of one embodiment of the utility model;
Fig. 2 is the landfill leachate treatment flow diagram of one embodiment of the utility model.
Specific embodiment
For a clearer understanding of the technical features, objectives and effects of the utility model, now control attached drawing is detailed Illustrate specific embodiment of the present utility model.
As shown in Figure 1, the garbage percolation liquid treating system of one embodiment of the utility model, including sequentially connected pretreatment Pond 10, filter 20, electrodialysis plant 30, biochemical treatment apparatus 40, film filter 50 and evaporator 60.Above-mentioned each device Between can pass through pipeline realize connection.
Wherein, for pretreatment pool 10 for accommodating landfill leachate and landfill leachate being pre-processed, removal is therein Suspended matter, heavy metal, sulfate ion, calcium ion and magnesium ion etc., and the clarified solution obtained after processing is delivered to filter 20.Clarified solution is filtered processing by filter 20, removes wherein remaining suspended matter, and the filter liquor obtained after filtering is defeated It send to electrodialysis plant 30.Filter liquor is carried out electrodialysis process by electrodialysis plant 40, obtains electrodialysis concentrated water and electrodialysis is light Water, and electrodialysis fresh water is delivered to biochemical treatment apparatus 40, electrodialysis concentrated water can be delivered to evaporator 60.Biochemical treatment apparatus 40 and film filter 50 biochemical, membrane filtration processing is carried out to electrodialysis concentrated water successively, remove the organic matter in electrodialysis fresh water And ammonia nitrogen, the membrane filtration concentrated water of acquisition are delivered to evaporator 60, the membrane filtration production water of acquisition can be used as recycle-water to recycle.Evaporation Device 60 is evaporated crystallization treatment to electrodialysis concentrated water and membrane filtration concentrated water, and obtaining can the crystal salt that utilizes of renewable resources and reuse Water.
Specifically, pretreatment pool 10 may include pond body and the chemicals dosing plant of alkaline agent added toward pond body;Chemicals dosing plant can be set It puts above pond body, appropriate alkaline agent can be added in pond body by Automatic Dosing mode;Alkaline agent includes sodium hydroxide, carbonic acid Sodium.The water outlet connection filter 20 of pond body, the water inlet end of pond body can connect collecting pit 70;Collecting pit 70 receives landfill leachate And it is delivered to predetermined flow of inlet water in the pond body of pretreatment pool 10.
20 preferred tubular type membrane filter of filter carries out refined filtration processing to clarified solution, further removes calcium ion, magnesium ion Deng filter liquors of the output SDI below 3, to meet the inflow requirement of follow-up electrodialysis process.
Due to adding in alkaline agent in pretreatment, obtained clarified solution is in strong basicity, therefore is also needed before filtration or after filtering Carry out pH readjustments.In this regard, garbage percolation liquid treating system may also include pH regulating reservoirs 80, it is attached to pretreatment pool 10 and mistake Between filter 20 or the output terminal of filter 20, the clarified solution that pretreatment pool 10 exports first are adjusted back in pH regulating reservoirs 80 through pH After enter back into filter 20.PH regulating reservoirs 80 are equipped with chemicals dosing plant, and acid solution (hydrochloric acid) is added into clarified solution or filter liquor to adjust Save its pH to 8-8.5.
In the present embodiment, one first force (forcing) pump 21 is equipped between the input end of filter 20 and pretreatment pool 10, first adds Clarified solution is pressurizeed and is sent into filter 20 by press pump 21.PH regulating reservoirs 80 are connected between filter 20 and electrodialysis plant 30, The input end with the port of export of filter 20 and electrodialysis plant 30 connects respectively.The filtrate collection that filter 20 exports is in pH In regulating reservoir 80, electrodialysis plant 30 is delivered to after pH is adjusted back.
PH regulating reservoirs 80 and electrodialysis plant 30 can be equipped with one second force (forcing) pump 81, and filter liquor is pressurizeed and is sent into electrodialysis dress Put 30.
Electrodialysis plant 30 receives the filter liquor from pH regulating reservoirs 80, and salt concentration desalt processing is carried out to filter liquor, with Obtain the electrodialysis fresh water of electrodialysis concentrated water of the salinity higher than 18% and salinity less than 1.2%.In electrodialysis plant 30, adopt Desalt processing module is concentrated by the use of homogeneous membrane electric dialyzator as salt, is carried out by one section of intermittent circular treatment of level-one, makes electric osmose The conductivity of analysis concentrated water reaches 150-170mS/cm, electrodialysis fresh water conductivity ﹤ 10mS/cm.
There are two the tools of electrodialysis plant 30 exports, respectively first outlet and second outlet, first outlet and second outlet Electrodialysis concentrated water and electrodialysis fresh water are exported respectively.The first outlet connection evaporator 60 of electrodialysis concentrated water is exported, by electrodialysis Concentrated water is sent to evaporator 60 and carries out subsequent evaporation crystallization treatment.Export the second outlet connection biochemical treatment apparatus of electrodialysis fresh water 40, electrodialysis fresh water enters film filter 50 after biochemical treatment apparatus 40 carries out biochemical treatment, is removed by membrane filtration Organic matter and ammonia nitrogen in electrodialysis fresh water obtain membrane filtration concentrated water and membrane filtration production water.
Wherein, the salinity of membrane filtration concentrated water is higher than 5%, and membrane filtration production water meets recycle-water requirement, collects and is used as back It is recycled with water.Membrane filtration concentrated water is sent to evaporator 60 and carries out subsequent evaporation crystallization treatment by film filter 50.
Further, garbage percolation liquid treating system may also include electrodialysis concentrated water pond 31 and electrodialysis fresh water pond 32.Electricity Dialysis concentrated water pond 31 is connect with the first outlet of electrodialysis plant 30, collects the electrodialysis concentrated water from electrodialysis plant 30;Electricity Dialysis fresh-water pool 32 is connect with the second outlet of electrodialysis plant 30, collects the electrodialysis fresh water from electrodialysis plant 30.
Specifically, the first outlet of the input end connection electrodialysis plant 30 in electrodialysis concentrated water pond 31, port of export connection are steamed Send out device 60.The second outlet of the input end connection electrodialysis plant 30 in electrodialysis fresh water pond 32, port of export connection biochemical treatment dress Put 40 input end.The port of export of biochemical treatment apparatus 40 then connects the input end of film filter 50, film filter 50 The port of export connects evaporator 60, and membrane filtration concentrated water is delivered to evaporator 60.
In addition, it can also add between the port of export of biochemical treatment apparatus 40 and the input end of film filter 50 equipped with a third Press pump 41 send the electrodialysis fresh water pressurization after biochemical treatment to film filter 50.
Alternatively, biochemical treatment apparatus 40 uses me.mbrane bioreactor, including the de-nitrification unit and denitrification to connect Unit.Aerobic microbiological (high activity) is equipped in de-nitrification unit makes the organic pollution of the bio-degradable in electrodialysis fresh water exist It almost degrades in de-nitrification unit, ammonia nitrogen and organic nitrogen is oxidized to nitrate;In denitrification unit by nitrate reduction into Nitrogen is discharged.Membrane filtration is dense wherein by the sodium chloride retention in the electrodialysis fresh water Jing Guo biochemical treatment for film filter 50 Water exports membrane filtration concentrated water and membrane filtration production water.
Evaporator 60 receives the electrodialysis concentrated water from electrodialysis concentrated water pond 31 and the membrane filtration from film filter 50 Concentrated water is evaporated crystallization treatment to it so that salinity therein is precipitated with crystalline salt form, obtains crystal salt and recycle-water.
Further, garbage percolation liquid treating system may also include evaporation former pond 90, the import point of evaporation former pond 90 Not Lian Jie electrodialysis plant 30 and film filter 50, by the electrodialysis concentrated water from electrodialysis plant 30 and from membrane filtration fill 50 membrane filtration concentrated water is put to be collected in wherein, then be delivered to evaporator 60.In the present embodiment, evaporation former pond 90 passes through electrodialysis Concentrated water pond 31 connects electrodialysis plant 30.Electrodialysis concentrated water and membrane filtration concentrated water are mixed to form mixing in former pond 90 is evaporated Liquid.The outlet connection evaporator 60 of former pond 90 is evaporated, one the 4th force (forcing) pump 91 can be equipped between the two, after mixed liquor is pressurizeed It is sent into evaporator 60.
According to processing needs, electrodialysis concentrated water pond 31 can also connect oxidation filter device, electrodialysis concentrated water is aoxidized Filtration treatment.Oxidation filter device is specifically connected between electrodialysis concentrated water pond 31 and evaporation former pond 90, and oxidation filtering is obtained The production water obtained is delivered in evaporation former pond 90.COD in the production water of acquisition<500mg/L, ammonia nitrogen concentration<10mg/L.Oxidation filtering Device mainly using the oxidisability of the oxidants such as sodium hypochlorite, destroys the dense Organic substance in water of electrodialysis;Using micro-filtrate membrane filtration oxygen Electrodialysis concentrated water after change, retains suspended matter therein.
Further, garbage percolation liquid treating system may also include reuse tank 100.Evaporator 60 connects reuse tank 100, will The recycle-water (condensed water) that evaporative crystallization processing obtains is back to reuse tank 80.
In addition, film filter 50 also connects reuse tank 100, membrane filtration production water is delivered to reuse tank 100, so as to rubbish In percolation liquid treating system, the production water for meeting recycle-water requirement for handling acquisition is collected in reuse tank 100, is concentrated again sharp With.
With reference to Fig. 1, Fig. 2, the garbage percolation liquid treating system of the utility model handles landfill leachate and can implement It is as follows:
The landfill leachate of collecting pit 70 is with flow of inlet water 50-200m3/ d flow in pretreatment pool 10 and is pre-processed certainly. The pH of NaON adjusting landfill leachates is added in pretreatment pool 10 to 11.5, then adds sodium carbonate, continuously stirring makes it fully Reaction generates precipitation of calcium carbonate, fully quiet heavy, and sediment is made to be sufficiently separated with supernatant, and acquisition meets follow-up refined filtration processing will The clarified solution asked.
Clarified solution pressurization is entered in tubular type membrane filter 20, in the filtrate collection pH regulating reservoirs 80 of acquisition, adds salt The pH of filtrate is pulled back to 8.5 by acid.
Filter liquor again by pressurization be sent into electrodialysis plant 30 carry out salt concentrate desalt processing, and export electrodialysis concentrated water and Electrodialysis fresh water.Electrodialysis concentrated water is collected in electrodialysis concentrated water pond 31, and electrodialysis fresh water is collected in electrodialysis fresh water pond 32.
Electrodialysis concentrated water direct current in electrodialysis concentrated water pond 31 extremely evaporates former pond 90;Electric osmose in electrodialysis fresh water pond 32 It analyses fresh water direct current to biochemical treatment apparatus 40 and carries out biochemical treatment;The bio-chemical effluent of biochemical treatment apparatus 40 enters film by pressurization Filter device 50 is filtered, and the membrane filtration production water that film filter 50 exports enters the storage of reuse tank 80 and recycles, output Membrane filtration concentrated water is delivered to evaporation former pond 90 and electrodialysis concentrated water is mixed to form mixed liquor wherein.
Mixed liquor in evaporation former pond 90 is evaporated crystallization as the evaporation pressurized evaporator 60 that is lifted into of raw water Processing.The product (crystal salt) of evaporative crystallization processing carries out recycling, and condensate return to reuse tank 80, which stores, to be recycled.
The above description is only the embodiments of the present invention, and it does not limit the scope of the patent of the present invention, every Equivalent structure or equivalent flow shift made based on the specification and figures of the utility model, is directly or indirectly used in Other related technical areas are equally included in the patent within the scope of the utility model.

Claims (10)

1. a kind of garbage percolation liquid treating system, which is characterized in that including landfill leachate is pre-processed pretreatment pool, The electricity of filter liquor progress electrodialysis process that the clarified solution for pre-processing acquisition is filtered the filter of processing, obtained to for filtering Electrodialysis apparatus, successively by electrodialysis obtain electrodialysis fresh water carry out biochemical treatment and membrane filtration processing biochemical treatment apparatus and The electrodialysis concentrated water that film filter and the membrane filtration concentrated water for obtaining membrane filtration processing and electrodialysis obtain is evaporated knot The evaporator of crystalline substance processing;
The pretreatment tank, filter, electrodialysis plant, biochemical treatment apparatus, film filter and evaporator are sequentially connected.
2. garbage percolation liquid treating system according to claim 1, which is characterized in that the garbage percolation liquid treating system Further include reuse tank;The evaporator connects the reuse tank, and the recycle-water that evaporative crystallization processing obtains is back to described return Use pond.
3. garbage percolation liquid treating system according to claim 2, which is characterized in that described in the film filter connection Membrane filtration production water is delivered to the reuse tank by reuse tank.
4. garbage percolation liquid treating system according to claim 1, which is characterized in that the filter is tubular type membrane filtration Device.
5. garbage percolation liquid treating system according to claim 1, which is characterized in that the electrodialysis plant includes homogeneous Membrane electrodialysis device.
6. garbage percolation liquid treating system according to claim 1, which is characterized in that the biochemical treatment apparatus is given birth to for film Change reactor, including the de-nitrification unit to connect and denitrification unit.
7. according to claim 1-6 any one of them garbage percolation liquid treating systems, which is characterized in that the landfill leachate Processing system further includes pH regulating reservoirs;The pH regulating reservoirs are connected between the pretreatment tank and filter or are connected to Between the filter and electrodialysis plant.
8. according to claim 1-6 any one of them garbage percolation liquid treating systems, which is characterized in that the electrodialysis plant Tool respectively exports the first outlet of electrodialysis concentrated water and the second outlet of output electrodialysis fresh water there are two exporting;
The garbage percolation liquid treating system further includes electrodialysis concentrated water pond and electrodialysis fresh water pond;The electrodialysis concentrated water pond with The first outlet connection, the electrodialysis fresh water pond is connect with the second outlet.
9. garbage percolation liquid treating system according to claim 8, which is characterized in that the electrodialysis concentrated water pond is also connected with Filter device is aoxidized, oxidation filtration treatment is carried out to electrodialysis concentrated water.
10. according to claim 1-6 any one of them garbage percolation liquid treating systems, which is characterized in that the garbage filter Liquid treating system further includes evaporation former pond;The import of the evaporation former pond connects the electrodialysis plant and membrane filtration respectively Device receives the electrodialysis concentrated water from the electrodialysis plant and the membrane filtration concentrated water from the film filter;It is described The outlet for evaporating former pond connects the evaporator, and the electrodialysis concentrated water of reception and membrane filtration concentrated water are delivered to the evaporation Device.
CN201721500060.5U 2017-11-10 2017-11-10 Garbage percolation liquid treating system Active CN207483528U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111423033A (en) * 2020-04-02 2020-07-17 上海海事大学 Wastewater treatment system and method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111423033A (en) * 2020-04-02 2020-07-17 上海海事大学 Wastewater treatment system and method

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