CN109607921A - A kind of efficient percolate treating process - Google Patents

A kind of efficient percolate treating process Download PDF

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Publication number
CN109607921A
CN109607921A CN201811637276.5A CN201811637276A CN109607921A CN 109607921 A CN109607921 A CN 109607921A CN 201811637276 A CN201811637276 A CN 201811637276A CN 109607921 A CN109607921 A CN 109607921A
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water
membrane module
level
sand filtration
pond
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谢军英
李方越
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Jiangsu Kunyi Environmental Engineering Co Ltd
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Jiangsu Kunyi Environmental Engineering Co Ltd
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Priority to CN201811637276.5A priority Critical patent/CN109607921A/en
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/02—Treatment of water, waste water, or sewage by heating
    • C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/24—Treatment of water, waste water, or sewage by flotation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/06—Contaminated groundwater or leachate
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions

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  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

The present invention relates to a kind of efficient percolate treating process, belong to technical field of sewage.Landfill leachate is introduced conditioning tank to collect into raw water row；Water outlet enters air bearing pond after into air flotation cell, the water outlet of air bearing pond enters sand filtration unit and then leads to membrane module water inlet end, concentrated water enters coagulating sedimentation unit through level-one membrane module concentrated water end, it produces water and leads to second membrane module water inlet end through membrane module production water end (W.E.), membrane module concentrated water leads to progress circulating filtration in sand filtration pond；Medicament is added in coagulating sedimentation unit, water outlet flow to tube microfiltration membrane component, then leads to three-level membrane module and be filtered；It produces water and enters sand filtration unit, concentrated water enters evaporation element；The production water of evaporation element leads to air flotation cell circulating filtration, and concentrated water is then concentrated by evaporation.The present invention is the qualified discharge that can guarantee output water water quality, and can guarantee the processing requirement of concentrate zero-emission, and system recycled in its entirety rate is close to 96.4%.

Description

A kind of efficient percolate treating process
Technical field
The present invention relates to a kind of efficient percolate treating process, belong to technical field of sewage.
Background technique
In recent years, with the continuous development of Urbanization in China, municipal refuse is also with every year on average 8%~10% speed Degree increases；And the growth rate of megalopolis is then up to 15%~20%.China's domestic waste reaches 2.64 hundred million tons within 2010, It is expected that the year two thousand thirty is 4.09 hundred million tons, the year two thousand fifty is 5.28 hundred million tons.Currently, due to the restriction of the factors such as economic technology, China's rubbish Processing is still by the way of sanitary landfills.For big city, there are more innoxious waste treatment facilities in each city, fills out It buries and accounts for 91%.However, rubbish during landfill, can generate the landfill leachate for threatening surrounding water source and public health, formed Secondary pollution, even if filling in the several years after envelope factory, this phenomenon can still continue.Some researches show that, until 1997, the U.S. 18500 refuse landfills are shared, almost have half landfill yard to produce different degrees of pollution to water body.It is adjusted according to 2010 years Look into report display: the percolate that China's city refuse landfill is discharged generates 32.46 ten thousand tons of COD, ammonia nitrogen 3.22 ten thousand Ton.Therefore, landfill leachate has become scientific research hot spot as a kind of seriously polluted its processing of waste water.
Landfill leachate is product of the liquid in landfill yard gravity flowing, is mainly derived from including for precipitation and rubbish itself Water.It is with BOD5With COD concentration is high, tenor is higher, water quality and quantity variation greatly, the content of ammonia nitrogen is higher, microorganism battalion The features such as supporting element ratio imbalance, if not being pocessed direct emission, will lead to ecological degeneration, serious environmental pollution is caused to ask Topic.Traditional method for treating garbage percolation liquid has both at home and abroad: aeration stabilization pond, anaerobic biofilter, upward flowing type anaerobic sludge Bed, anaerobism-oxidation ditch-facultative lagoon technique, UASB- oxidation ditch-stabilization pond, soil irrigation method etc..China's publication in 2008 is implemented The GB 16889-2008 of new revision " household refuse landfill sites contamination control standard ", to BOD in landfill leachate5、CODcr、 The indexs such as ammonia nitrogen, total nitrogen, heavy metal propose tightened up discharge standard.Traditional biological treatment, which is difficult to reach discharge, to be wanted It asks.
The major way of existing country's landfill leachate is as follows: percolate is concentrated in collecting pit, after coagulating sedimentation Sludge enters concentration basin, and liquid portion carries out Anaerobic Treatment, and the sludge of generation enters back into concentration basin, and the firedamp drainage of generation produces Raw liquid portion enters back at the biochemical membranous system of aerobic/anaerobic (A/O) technique combination membrane bioreactor (MBR) Reason generates mud and enters back into concentration basin, and water outlet is handled by rolling NF/RO, produces water qualified discharge, and concentrated water can be sprayed onto incinerator.Sludge To the sludge condensation of collection in concentration basin, filtrate returns to collecting pit, and the sludge after concentration forms mud after sludge filter press is handled Cake landfill, the filtrate that filters pressing generates also return to collecting pit.The stability being discharged in the technique is difficult to control；Biochemical system occupies face Product is big, and cost of investment is high；It is relatively low that practical rolling RO/NF system produces the water rate of recovery.
Summary of the invention
The technical problem to be solved by the present invention is to provide a kind of efficient percolate treating process for the above-mentioned prior art, Not only process flow is simple, and land occupation is few, guarantees the discharge of output water water quality reaching standard, concentrate zero-emission；And produce water rate of recovery pole It is high.
The present invention solves the above problems used technical solution are as follows: a kind of efficient percolate treating process, including it is as follows Step:
Step 1: landfill leachate is introduced into conditioning tank and is collected into raw water row and to raw water progress Ph value adjusting；
Step 2: the raw water after adjusting enters air flotation cell and carries out removing dross processing, and air flotation cell water outlet enters air-float water Pond buffer and does further adjustment to raw water Ph, and dross then enters dross collecting pit, is dehydrated to form filter cake by dewaterer It sends outside；
Step 3: the water outlet of air bearing pond enters sand filtration unit and carries out particulate matter filtering, and filtering accuracy about 50um introduces sand afterwards Filter pool carries out homogeneous average processing to water quality；
Step 4: level-one membrane module water inlet end is transported in the water outlet of sand filtration pond, and after the filtering of level-one membrane module, concentrated water is through level-one Membrane module concentrated water end enters coagulating sedimentation unit, produces water through level-one membrane module production water end (W.E.) and leads to second membrane module water inlet end, to water Matter does further filtration treatment, and the concentrated water of second membrane module leads to progress circulating filtration in sand filtration pond, repeats this step；And two Production water outlet in grade membrane module；
Step 5: being added medicament in coagulating sedimentation unit, and calcium, magnesium plasma are formed sediment sedimentation and remove non-carbonic acid Carbonate hardness, coagulating sedimentation unit discharge water to the buffering pressurization of the first intermediate pool, and sediment is squeezed into filter after entering dewaterer dehydration Cake is sent outside；
Step 6: the water outlet of the first intermediate pool flow to tube microfiltration membrane component, it is brilliant to its tiny calcium carbonate and other Solid particle is removed；Filtered water quality flow to the second intermediate pool；
Step 7: the water outlet of the second intermediate pool leads to three-level membrane module and is filtered, and the production water of three-level membrane module flow to sand Filter pool internal circulation filtering, starts the cycle over from step 4；The concentrated water of three-level membrane module enters evaporation element；
Step 8: the production water of evaporation element leads to air flotation cell circulating filtration, starts the cycle over from step 2, concentrated water is then evaporated Concentration.
The filtering accuracy of the sand filtration unit is 50um.
The tube microfiltration membrane component filters are greater than the particulate matter of 0.2um.
The medicament is NaOH, Ca (OH)2And Na2CO3。
Ph value is 6-8 in the membrane module system.
The processing system for implementing the above-mentioned technique includes conditioning tank, air flotation cell, sand filtration unit, level-one membrane module, second level Membrane module, coagulating sedimentation unit, tube microfiltration membrane component, three-level membrane module and evaporation element, the conditioning tank by pipeline according to Secondary connection air flotation cell, air bearing pond, sand filtration unit, sand filtration pond and level-one membrane module water inlet end, the level-one membrane module produce Water end (W.E.) connects second membrane module water inlet end, and the level-one membrane module concentrated water end is sequentially connected coagulating sedimentation unit, the first intermediate water Pond, tube microfiltration membrane component, the second intermediate pool and three-level membrane module water inlet end, the three-level membrane module produce water end (W.E.) and sand leaching water Pond connection；The three-level membrane module concentrated water end connects evaporation element, and the evaporation element produces water end (W.E.) and air flotation cell input end connects It is logical；The concentrated water end of the second membrane module is connected to sand filtration pond input end；The outer scheduled production water of the production water end (W.E.) of the second membrane module.
The level-one membrane module is constituted more by covering 90Bar DTRO membranous system, and the second membrane module by covering 75Bar more DTRO membranous system is constituted, and the three-level membrane module is that more set 120Bar DTRO membranous systems are constituted.
Compared with the prior art, the advantages of the present invention are as follows a kind of efficient percolate treating process, using shallow-layer coagulation from Sub- air bearing+quartz sand mechanical filter+level-one DTRO+ second level RO+ stripping+coagulating sedimentation+tubular type PP+120barDTRO+ evaporation knot It is brilliant " as main process processing landfill leachate, that is, it can guarantee the qualified discharge of output water water quality, and can guarantee concentrate zero The processing requirement of discharge, system recycled in its entirety rate is close to 96.4%.Most province, operating cost are invested under the premise of meeting emission request It is minimum, treatment effect is best.
Detailed description of the invention
Fig. 1 is a kind of flow diagram of efficient percolate treating process of the embodiment of the present invention；
1 conditioning tank, 2 air flotation cells, 3 air bearing ponds, 4 sand filtration units, 5 sand filtration ponds, 6 level-one membrane modules, 7 second levels in figure Membrane module, 8 coagulating sedimentation units, 9 first intermediate pools, 10 tube microfiltration membrane components, 11 second intermediate pools, 12 three-level film groups Part, 14 evaporation elements.
Specific embodiment
The present invention will be described in further detail below with reference to the embodiments of the drawings.
As shown in Figure 1, the efficient percolate treating process of one of the present embodiment, the corresponding processing system of the technique include Conditioning tank 1, air flotation cell 2, sand filtration unit 4, level-one membrane module 6, second membrane module 7, coagulating sedimentation unit 8, tube microfiltration membrane Component 10, three-level membrane module 12 and evaporation element 14, conditioning tank 1 are sequentially connected air flotation cell 2, air bearing pond 3, sand by pipeline Unit 4,6 water inlet end of sand filtration pond 5 and level-one membrane module are filtered, level-one membrane module 6 produces water end (W.E.) and connects 7 water inlet end of second membrane module, 6 concentrated water end of level-one membrane module is sequentially connected coagulating sedimentation unit 8, the first intermediate pool 9, tube microfiltration membrane component by pipeline 10,12 water inlet end of the second intermediate pool 11 and three-level membrane module, three-level membrane module 12 produce water end (W.E.) and are connected to sand filtration pond 5；It carries out Recycling, 12 concentrated water end of three-level membrane module connection evaporation element 14 are evaporated, and evaporation element 14 produces water end (W.E.) and air bearing Unit 2 is connected to, and carries out recycling；7 concentrated water end of second membrane module is connected to sand filtration pond 5；So that in second membrane module 7 Concentrated water is recycled through level-one membrane module 7 again, the production water qualified discharge in second membrane module 7.
Above-mentioned level-one membrane module 6 includes 6 sets of 90Bar DTRO film cascade compositions, and second membrane module 7 includes 6 sets of 75Bar DTRO film cascade composition, three-level membrane module 12 include 2 sets of 120Bar DTRO film cascade compositions.
The technical parameter of above-mentioned air flotation cell 2 is as shown in Table 1:
Table one
Serial number Project Design value Unit
1 Flotation tank quantity 1 Set
2 Carry out water flow 120 m3/hr
3 Air bearing pool size Φ7000*H1200
4 Flotation tank surface loading 3.2 m3/m2.hr
5 Dissolved air water amount 50 m3/hr
The technical parameter of above-mentioned sand filtration unit 4 is as shown in Table 2:
Table two
Serial number Project Design value Unit
1 Sandfiltration pot quantity 2
2 Carry out water flow 85 m3/hr
3 Sandfiltration pot diameter Dia2500*2
4 Sandfiltration pot flow velocity 8.7 m/hr
5 Air blower flow 7.7 m3/min
6 Air backwash intensity 26 L/(m2·s)
7 Backwash water pump flow 250 m3/hr
8 Backwash water pump backwash intensity 13 L/(m2·s)
9 Quartz sand filling rate 70 %
Above-mentioned 8 design parameter of coagulating sedimentation unit is as shown in Table 3:
Table three
Serial number Project Design value Unit
1 Pond body size L14*W5*H4.8 m
2 Handle water 30 m3/h
3 The coagulating time 16 min
4 The flocculation reaction time 16 min
5 Soften the reaction time 20 min
6 Surface loading 0.55 m3/㎡.h
7 Residence time 4.2 Hour
8 Bucket total measurement (volume) 50 Cubic meter
9 Spoil disposal frequency 1 Day/time
Above-mentioned PP-MF tube microfiltration membrane component 10 (needing 5 sets altogether) design parameter is as shown in Table 4:
Table four
Serial number Project Design value Unit
1 Film type PP-MF-16
2 Material PP
3 Internal diameter 5.5 mm
4 Film wire quantity 324 Root
5 Rate of circulating flow 4 m/s
6 Quantity of circulating water 110 m3/h
7 Calculate inflow 6 m3/h
8 Practical inflow 40 m3/h
9 Pore size 0.2 Micron
10 Maximum feed pressure 3 bar
11 Film cylinder product 16 m2
12 Membrane module quantity 5 Only
13 Temperature 5-50 ℃
14 PH value 1~14
15 Average flux 22.89 LMH
Above-mentioned 90bar DTRO (needing 6 sets altogether) design parameter is as shown in Table 5:
Table five
Serial number Project Design value Unit
1 Film type 90bar DTRO
2 Calculate inflow 18.71 m3/h
3 The rate of recovery 72% %
4 Cycles of concentration 3.57
5 Feed pressure 55 bar
6 Film cylinder product 9.5 m2
7 Film column quantity 120 Only
8 Temperature 25.00 ℃
9 PH value 6~8
10 Average flux 12 LMH
Above-mentioned 75bar DTRO (needing 6 sets altogether) design parameter is as shown in Table 5:
Table six
Serial number Project Design value Unit
1 Film type 75bar DTRO
2 Calculate inflow 13.47 m3/h
3 The rate of recovery 92% %
4 Cycles of concentration 12.5
5 Feed pressure 25 bar
6 Film cylinder product 9.405 m2
7 Film column quantity 40 Only
8 Temperature 25.00 ℃
9 PH value 6~8
10 Average flux 33 LMH
Above-mentioned 120bar DTRO (needing 2 sets altogether) design parameter is as shown in Table 5:
Table seven
Serial number Project Design value Unit
1 Film type 120bar DTRO
2 Calculate inflow 14.81 m3/h
3 The rate of recovery 55% %
4 Cycles of concentration 2.22
5 Feed pressure 80 bar
6 Film cylinder product 9.405 m2
7 Film column quantity 10 Only
8 Temperature 25.00 ℃
9 PH value 6~8
10 Average flux 9 LMH
Percolate treating process based on above-mentioned processing system the following steps are included:
(1) 1600m3/d landfill leachate introducing conditioning tank 1 is collected and the adjusting of Ph value is carried out to raw water, be adjusted to Ph6.5 effectively prevent carbonate inorganic salts fouling；
(2) conditioning tank 1 discharges water to air flotation cell 2, carries out removing dross processing to suspended matter, the water outlet of air flotation cell 2 enters gas Swim pond 3 carry out buffer and further adjustment is done to water quality Ph, dross then enters dross collecting pit and is dehydrated to be formed by dewaterer Filter cake is sent outside；
(3) water outlet of air bearing pond 3 enters the progress particulate matter filtering of sand filtration unit 4, and filtering accuracy about 50um can will be greater than The particulate matter of 50um filters, and the water outlet of sand filtration unit 4 enters sand filtration pond 5, carries out homogeneous average processing to water quality；
(4) water outlet of sand filtration pond 5 is delivered to 90bar DTRO membranous system by elevator pump, and 90bar DTRO membranous system is sledge dress Structure, raw water initially enter cartridge filter, and cartridge filter precision is 10 μm, for removing suspended matter and may be due to sand filtration The small sand grains of bring, for permeated liquid system, since the easily scale-forming ion and silicate content such as calcium, magnesium, barium is high in raw water, warp These salt are easy hypersaturated state occur in concentrate side after the concentration of 90bar DTRO membrane module high power, so according to practical water quality A certain amount of antisludging agent, which is added, in situation before cartridge filter prevents the generation of silicon dirt and sulfate scale phenomenon, specific additive amount Depending on live water quality situation, antisludging agent extension rate is no more than 10 times.Cartridge filter provides last pipe protection for film column Barrier.It flow to 90bar DTRO membranous system by the percolate of cartridge filter to be filtered, the concentrated water of 652m3/d flow to coagulation Precipitation unit 8,1676m3/d produce water and lead to 75bar DTRO membranous system water inlet end through the production water end (W.E.) of 90bar DTRO membranous system, do Further filtration treatment, the concentrated water for generating 134m3/d, which is led to, carries out circulating filtration in sand filtration pond 5, and generates 1542m3/d production Water flow to water producing tank, produces water and reaches emission request；
(5) concentrated water of 652m3/d is introduced into coagulating sedimentation unit 8, is added NaOH/Ca (OH)2Calcium, magnesium plasma are formed Sediment sedimentation, is added Na2CO3Non-carbonate hardness is removed, will not be changed by the salt content in this agent-feeding treatment water, but Most of divalent salts can be precipitated, largely mixed for monovalent salt in supernatant, coagulating sedimentation unit 8 is discharged the first intermediate pool 9 Buffering pressurization, sediment are squeezed into filter cake and send outside after entering dewaterer dehydration；
The water outlet of (6) first intermediate pools 9 flow to PP-MF tube microfiltration membrane component 10, and tube microfiltration membrane component 10 being capable of mistake Filter is greater than the particulate matter of 0.2um, is removed to its tiny calcium carbonate crystalline substance and other solid particles；Ensure next procedure Safe operation；Filtered water quality leads to the second intermediate pool 11；
(7) second intermediate pools 11 discharge water to 120bar DTRO membranous system and are filtered, and generate the production water flow of 359m3/d To sand filtration pond 5, repeatedly step (4) starts the cycle over filtering again,
(8) concentrated water for generating 293m3/d enters the evaporation of evaporation element 13, and the concentrated water after evaporation is 58m3/d, produces water and is 235m3/d, and lead to air flotation cell 2 and recycled, it is started the cycle over from step (2).
It is 1600m3/d that raw water, which is passed through water, and after being handled by above-mentioned treatment process, production water water up to standard is 1542m3/d, Concentrate after evaporation is 58m3/d, and system recycled in its entirety rate is close to 96.4%.Guarantee the qualified discharge of producing water water quality, and can Guarantee the processing requirement of concentrate zero-emission；And processing system is stable, and it is easy to operate, in the premise for meeting emission request Lower investment most saves, the lowest coursing cost, and treatment effect is best.
In addition to the implementation, all to use equivalent transformation or equivalent replacement the invention also includes there is an other embodiments The technical solution that mode is formed should all be fallen within the scope of the hereto appended claims.

Claims (7)

1. a kind of efficient percolate treating process, it is characterised in that: the following steps are included:
Step 1: landfill leachate is introduced into conditioning tank (1) and is collected into raw water row and to raw water progress pH adjusting；
Step 2: the raw water after adjusting enters air flotation cell (2) and carries out removing dross processing, and air flotation cell water outlet enters air bearing pond (3) it carries out buffering and further adjustment is done to raw water pH, dross then enters dross collecting pit, is dehydrated to form filter cake by dewaterer It sends outside；
Step 3: air bearing pond (3) water outlet enters sand filtration unit (4) and carries out particulate matter filtering, filters out 50um or more partial size Particulate matter introduces sand filtration pond (5) later, carries out homogeneous average processing to water quality；
Step 4: level-one membrane module (6) water inlet end is transported in sand filtration pond (5) water outlet, after level-one membrane module (6) filtering, concentrated water Enter coagulating sedimentation unit (8) through level-one membrane module (6) concentrated water end, produces water through level-one membrane module (6) production water end (W.E.) and lead to secondary membrane Component (7) water inlet end does further filtration treatment to water quality, and the concentrated water of second membrane module (7) leads in sand filtration pond (5) and carries out Circulating filtration repeats this step；And the production water outlet in second membrane module (7)；
Step 5: being added medicament in coagulating sedimentation unit (8), calcium, magnesium plasma are formed sediment sedimentation and remove non-carbonic acid Carbonate hardness, coagulating sedimentation unit (8) discharge water to the pressurization of the first intermediate pool (9) buffering, and sediment squeezes after entering dewaterer dehydration Filter cake is pressed into send outside；
Step 6: the first intermediate pool (9) water outlet flow to tube microfiltration membrane component (10), it is brilliant to its tiny calcium carbonate and its He is removed solid particle；Filtered water quality flow to the second intermediate pool (11)；
Step 7: the second intermediate pool (11) water outlet leads to three-level membrane module (12) and is filtered, the production of three-level membrane module (12) Water flow to sand filtration pond (5) internal circulation filtering, starts the cycle over from step 4；The concentrated water of three-level membrane module (12) enters evaporation element (13)；
Step 8: the production water of evaporation element (13) leads to air flotation cell (2) circulating filtration, starts the cycle over from step 2, concentrated water is then It is concentrated by evaporation.
2. a kind of efficient percolate treating process according to claim 1, it is characterised in that: the sand filtration unit (4) Filtering accuracy is 50um.
3. a kind of efficient percolate treating process according to claim 1, it is characterised in that: the tube microfiltration membrane component (10) filtering is greater than the particulate matter of 0.2um.
4. a kind of efficient percolate treating process according to claim 1, it is characterised in that: the medicament is NaOH, Ca (OH)2And Na2CO3Arbitrarily compare mixture.
5. a kind of efficient percolate treating process according to claim 1, it is characterised in that: pH in the membrane module system Value is 6-8.
6. a kind of efficient percolate treating process according to claim 1, it is characterised in that: implement the processing system of the technique System includes conditioning tank (1), air flotation cell (2), sand filtration unit (4), level-one membrane module (6), second membrane module (7), coagulating sedimentation Unit (8), tube microfiltration membrane component (10), three-level membrane module (12) and evaporation element (13), the conditioning tank (1) pass through pipeline It is sequentially connected air flotation cell (2), air bearing pond (3), sand filtration unit (4), sand filtration pond (5) and level-one membrane module (6) water inlet end, The level-one membrane module (6) produces water end (W.E.) and connects second membrane module (7) water inlet end, and level-one membrane module (6) the concentrated water end successively connects Connect coagulating sedimentation unit (8), the first intermediate pool (9), tube microfiltration membrane component (10), the second intermediate pool (11) and three-level film Component (12) water inlet end, the three-level membrane module (12) produce water end (W.E.) and are connected to sand filtration pond (5)；The three-level membrane module (12) is dense Water end (W.E.) connects evaporation element (13), and the evaporation element (13) produces water end (W.E.) and is connected to air flotation cell (2) input end；The secondary membrane The concentrated water end of component (7) is connected to sand filtration pond (5) input end；The outer scheduled production water of the production water end (W.E.) of the second membrane module (7).
7. a kind of efficient percolate treating process according to claim 6, it is characterised in that: the level-one membrane module (6) It being constituted by covering 90Bar DTRO membranous system more, the second membrane module (7) is constituted more by covering 75Bar DTRO membranous system, and described three Grade membrane module (12) is that more set 120Bar DTRO membranous systems are constituted.
CN201811637276.5A 2018-12-29 2018-12-29 A kind of efficient percolate treating process Pending CN109607921A (en)

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