CN110304688A - A kind of high-efficient treatment method and its device of steel wastewater - Google Patents
A kind of high-efficient treatment method and its device of steel wastewater Download PDFInfo
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- CN110304688A CN110304688A CN201810227280.8A CN201810227280A CN110304688A CN 110304688 A CN110304688 A CN 110304688A CN 201810227280 A CN201810227280 A CN 201810227280A CN 110304688 A CN110304688 A CN 110304688A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/14—Ultrafiltration; Microfiltration
- B01D61/145—Ultrafiltration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/14—Ultrafiltration; Microfiltration
- B01D61/18—Apparatus therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
- B01D63/02—Hollow fibre modules
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D65/00—Accessories or auxiliary operations, in general, for separation processes or apparatus using semi-permeable membranes
- B01D65/02—Membrane cleaning or sterilisation ; Membrane regeneration
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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
- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2321/00—Details relating to membrane cleaning, regeneration, sterilization or to the prevention of fouling
- B01D2321/16—Use of chemical agents
- B01D2321/162—Use of acids
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
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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
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
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- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The present invention, which discloses, provides the high-efficient treatment method and its device of a kind of steel wastewater, including former pond, raw water pump, film reaction pond, vacuum pump, vacuum electric valve, production water pump, production water motor-driven valve, production pond, backwashing pump, accurate filter, backwash motor-driven valve, roots blower, air inlet motor-driven valve and maintainability cleaning system.Steel wastewater is delivered in film reaction pond, the ultrafiltration membrane in reaction tank is the hollow-fibre membrane of PTFE material.It is complete to produce the water period including producing water, air purge, air water backwash, producing water.Device empties membrane cisterna concentrate every 6~15h, and is automatically replenished into normal filtration program.The period of maintainability chemical cleaning can be determined in operational process according to transmembrane pressure ascendant trend；As transmembrane pressure Cha≤- 0.05Mpa, restorative chemical cleaning need to be carried out to PTFE hollow-fibre membrane.Due to using PTFE hollow-fibre membrane, effluent quality and processed in units water is not only increased, and reduce steel wastewater processing operating cost, haved the function that energy-saving and production-increase.
Description
Technical field
The present invention relates to water treatment field, in particular to the high-efficient treatment method and its device of a kind of steel wastewater.
Background technique
Wastewater of steel industry is mainly derived from production process water, equipment and product cooling water, fume washing water, if
Standby and place ejected wash water etc..Wherein cooling water 70% or so is various cooling waters, in waste water containing thermal pollution, SS, organic matter,
Chemical toxicant, heavy metal, soda acid pollution etc..
Steel and iron industry is with water and to drain rich and influential family, therefore improvement, the raising of reinforcement wastewater of steel industry recycle, for
It protects environment, improve Enterprise Integrated competitiveness, realize that industrial upgrading has great significance.
At present both at home and abroad the general processing method of steel wastewater be based on physico-chemical process, bioanalysis, physical sedimentation method, by with
Upper processing, most of waste water can repeat to recycle.
Physico-chemical process is a kind of method of commonly used processing steel wastewater, especially in processing oil-containing or dilute oily waste water
When.Flocculated method is used to put into flocculant in waste water to remove the metal ion in waste water, to reach processing waste water
Effect.
Li Zhitong is handled using pollution discharge water of the physical-chemical process to ironmaking area and steel rolling area, dominating process route
Enter high efficiency clarification tank after removing most suspended substances for Wastewater Pretreatment, is quickly mixed into after PAC, Ca (OH) 2 is added
Flocculation tank, and mixed with the partial reflux body refuse of clarifying basin enrichment region, PAM is added in two times in flocculation basin, removes micro-
Oil, COD, coloration, heavy metal etc. are measured, so that iron and steel enterprise is always arranged mouth sewage and keeps water quality as clear as crystal.
In most cases, high and right using equipment cost needed for the metal in physical-chemical method processing waste water
The low water treatment effect of starting metals concentration is undesirable, and bioanalysis has the characteristics that processing cost is low.Xu Wei etc. is using life
Object reinforcement technique is thrown BP type effectively compound microbial into activated Sludge System, is achieved preferably to the processing of cold rolling wastewater
Effect.
Currently, the work of reusing sewage has been carried out in many iron and steel enterprises, it is largely to use traditional processing technique,
Such as biochemical degradation, coagulating sedimentation, air bearing, filtering, but because of wastewater of steel industry complicated component, through traditional handicraft treated water
It cannot be removed effectively pollutant therein, be unable to meet production with new water requirement, and embrane method advanced treating solves this and asks
Topic.But at present hollow-fibre membrane on the market there are fracture of wires serious, anti acid alkali performance can it is poor, that cleaning is frequent, the service life is short etc. is a series of
Problem constrains application of the embrane method on steel wastewater.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of high-efficient treatment method of steel wastewater and its device, the party
Method overcomes the deficiencies in the prior art, improves effluent quality and processed in units water, reduces steel wastewater processing running cost
With easy to operate.
A kind of high-efficient treatment method of steel wastewater of the invention, comprising:
Steel wastewater is delivered in film reaction pond, the ultrafiltration membrane in film reaction pond is the hollow-fibre membrane of PTFE material；
One production water period includes producing water, air purge, air water backwash；Film reaction pond concentrate is emptied every 6~15h, and is automatically replenished
Into normal filtration program；The period of maintainability chemical cleaning can be determined in operational process according to transmembrane pressure ascendant trend；When
When transmembrane pressure Cha≤- 0.05Mpa, restorative chemical cleaning need to be carried out to ultrafiltration membrane.
The steel wastewater be pass through pretreated steel wastewater, SS be≤200mg/L, COD be≤150mg/L,
Containing mineral oil≤10mg/L, total iron≤5mg/L, conductivity≤3500 μ S/cm.
Ultrafiltration membrane in the film reaction pond is PTFE hollow-fibre membrane, and the aperture of ultrafiltration membrane is 0.05~0.2 μm, and pH makes
It is 0~14 with range.
The production water period is 20~100min, and the production water time is 19~99min, and the air purge time is 0.5~2min, air water
The backwash time is 0.5~2min；For inflow temperature at 1~80 DEG C, maximum backwash pressure is 0.16Mpa, produces water turbidity < 0.2NTU.
It is 20~60 (L/m2/h) that the ultrafiltration membrane, which produces moisture film flux, and backwash flux is 30~120 (L/m2/h).
The air quantity that the ultrafiltration membrane gas is cleaned is 40~100Nm3/m2h。
The maintainability chemical cleaning are as follows: NaClO solution is sent into inside the film wire of ultrafiltration membrane, stands 5~30min, clearly
Film reaction pond solution emptying after washing；Then citric acid solution is sent into inside the film wire of ultrafiltration membrane, stands 5~30min, cleaning
Film reaction pond solution emptying afterwards；Wherein, concentration of the NaClO solution in film reaction pond is 300~1000ppm；Film reaction pond
The concentration of interior citric acid is 1000~3000ppm.
The restorative chemical cleaning are as follows: NaClO solution is sent into film reaction pond, 1~2min is aerated, stands 4~8h,
Film reaction pond solution emptying after cleaning；Then citric acid solution is sent into film reaction pond, 1~2min of aeration, standing 2~
4h, the film reaction pond solution emptying after cleaning；Wherein, concentration of the NaClO solution in film reaction pond is 1500~3000ppm；
The concentration of citric acid is 5000~20000ppm in film reaction pond.
The processing method is after restorative chemical cleaning, the flux recovery of film to 100%.
Ultrafiltration membrane water-out manners are unilateral water outlet in the processing method.
When the PTFE doughnut film process steel wastewater, can by increase backwash water or reconcile gas scouring amount come
Alleviate transmembrane pressure ascendant trend, it is ensured that continuous and steady operation when wastewater treatment.
A kind of high-efficient treatment device of steel wastewater of the invention, including former pond, raw water pump, film reaction pond, in PTFE
Empty fiber membrane and film frame produce water motor-driven valve, produce water pump, produce pond, backwashing pump, accurate filter, backwash motor-driven valve, Luo Cifeng
Machine, air inlet motor-driven valve, vacuum pump, vacuum valve, sodium hypochlorite dosing tank, sodium hypochlorite metering pump, citric acid dosing tank, citric acid
Metering pump, sodium hypochlorite medicament delivery pump, sodium hypochlorite medicine storing pot, lemon acid treatment delivery pump, citric acid medicine storing pot, electronic row
Empty valve, it is characterised in that: the water inlet end in the film reaction pond is connected to by water inlet line and raw water pump with former pond, the PTFE
Hollow-fibre membrane and film frame are installed in film reaction pond, and the film reaction bottom of pond portion is equipped with electric atmospheric relief valve, and the PTFE is hollow
Tunica fibrosa and film frame are connected by admission line with roots blower, and air inlet motor-driven valve, the film are equipped on admission line
The production water side of reaction tank is connected to by water production pipeline and production water pump with is produced from pond, and is equipped with and is produced between the production water pump and film reaction pond
Water motor-driven valve, the vacuum pump and vacuum valve are connected by vacuum pipe with water production pipeline, and the production pond passes through backwash tube
Road and backwashing pump are connected with film reaction pond, and backwash motor-driven valve and secondary filter are equipped between the backwashing pump and film reaction pond
Device；It is equipped with maintainability between the backwashing pump and accurate filter and cleans chemical feeding points, the sodium hypochlorite dosing tank and hypochlorous acid
Sodium metering pump cleans chemical feeding points with maintainability by pipeline and is connected, and the citric acid dosing tank and citric acid metering pump pass through pipe
Road is connected with maintainability cleaning chemical feeding points；The sodium hypochlorite medicine storing pot and sodium hypochlorite medicament delivery pump pass through pipeline
To film reaction pond, the citric acid medicine storing pot and lemon acid treatment delivery pump pass through pipeline to film reaction pond.
The backwash pipe end and the water production pipeline for producing water motor-driven valve front end form the first connection point, first connection
Point forms to the pipeline between PTFE hollow-fibre membrane and film frame and produces water, backwash common conduit.
The vacuum pipe and water production pipeline connection point are located at water production pipeline highest point, water production pipeline produce water motor-driven valve and
Pipeline between PTFE hollow-fibre membrane and film frame and backwash pipeline backwash motor-driven valve forms vacuum, produces water common conduit.
Steel wastewater treatment process device of the present invention is integrated apparatus.
Protrusion achievement of the invention is: the technological core handled using PTFE hollow-fibre membrane as steel wastewater is passed through
Negative-pressure ward filters off depollution substance, improves effluent quality and processed in units water, reduces steel wastewater processing operation
Expense, it is easy to operate.
In conclusion the invention has the following advantages:
1, it uses PTFE hollow-fibre membrane for the method for core, has membrane flux high, resistance tocrocking is strong, no fracture of wire, energy consumption
It saves, the advantages that service life is long；
2, using PTFE doughnut film process steel wastewater, the rate of recovery is high, effluent quality is good and stablizes；
3, device is easy to operate, stable and reliable operation.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of apparatus of the present invention；
Fig. 2 is the relational graph of PTFE doughnut membrane flux and transmembrane pressure with runing time；
Fig. 3 is the relational graph using the production water turbidity and runing time of PTFE doughnut film process steel wastewater.
In figure, 1, former pond；2, raw water pump；3, film reaction pond；4, PTFE hollow-fibre membrane and mould bases；5, it is dynamic to produce water power
Valve；6, water pump is produced；7, pond is produced；8, backwashing pump；9, accurate filter；10, backwash motor-driven valve；11, roots blower；12, air inlet
Motor-driven valve；13, vacuum pump；14, vacuum valve；15, sodium hypochlorite dosing tank；16, sodium hypochlorite metering pump；17, citric acid dosing
Case；18, citric acid metering pump；19, sodium hypochlorite medicament delivery pump；20, sodium hypochlorite medicine storing pot；21, lemon acid treatment conveys
Pump；22, citric acid medicine storing pot；23, electric atmospheric relief valve；24, the first connection point；25, the second connection point.
Specific embodiment
Present invention will be further explained below with reference to specific examples.It should be understood that these embodiments are merely to illustrate the present invention
Rather than it limits the scope of the invention.In addition, it should also be understood that, after reading the content taught by the present invention, those skilled in the art
Member can make various changes or modifications the present invention, and such equivalent forms equally fall within the application the appended claims and limited
Range.
Embodiment:
Referring to Fig. 1, a kind of high-efficient treatment device of steel wastewater, including former pond 1, raw water pump 2, film reaction pond 3, PTFE
Hollow-fibre membrane and film frame 4 produce water motor-driven valve 5, produce water pump 6, produce pond 7, backwashing pump 8, accurate filter 9, backwash motor-driven valve
10, roots blower 11, air inlet motor-driven valve 12, vacuum pump 13, vacuum valve 14, sodium hypochlorite dosing tank 15, sodium hypochlorite metering pump
16, citric acid dosing tank 17, citric acid metering pump 18, sodium hypochlorite medicament delivery pump 19, sodium hypochlorite medicine storing pot 20, citric acid
Medicament delivery pump 21, citric acid medicine storing pot 22 and electric atmospheric relief valve 23.
The water inlet end in film reaction pond 3 is connected to by water inlet line and raw water pump 2 with former pond 1, PTFE hollow-fibre membrane and
Film frame 4 is installed in film reaction pond 3, and 3 bottom of film reaction pond is equipped with electric atmospheric relief valve 23, and PTFE hollow-fibre membrane and film frame 4 are logical
It crosses admission line to be connected with roots blower 11, and is equipped with air inlet motor-driven valve 12, the production water side in film reaction pond 3 on admission line
It is connected to by water production pipeline and production water pump 6 with is produced from pond 7, produces the water production pipeline between water pump 6 and film reaction pond 3 and be equipped with production water
Motor-driven valve 5, vacuum pump 13 and vacuum valve 14 are connected by vacuum pipe with water production pipeline, produce pond 7 by backwash pipeline and
Backwashing pump 8 is connected with film reaction pond 3, the backwash pipeline between backwashing pump 8 and film reaction pond 3 be equipped with backwash motor-driven valve 10 and
Accurate filter 9；Between backwashing pump 8 and accurate filter 9 be equipped with maintainability clean chemical feeding points, sodium hypochlorite dosing tank 15 and time
Sodium chlorate metering pump 16 cleans chemical feeding points with maintainability by pipeline and is connected, citric acid dosing tank 17 and citric acid metering pump 18
Chemical feeding points are cleaned with maintainability by pipeline to be connected；Sodium hypochlorite medicine storing pot 20 and sodium hypochlorite medicament delivery pump 19 pass through pipe
Road is delivered to film reaction pond 3, citric acid medicine storing pot 22 and lemon acid treatment delivery pump 21 and passes through pipeline to film reaction pond 3.
Backwash pipe end and the water production pipeline for producing 5 front end of water motor-driven valve form the first connection point 24, the first connection point 24
It is formed to the pipeline between PTFE hollow-fibre membrane and film frame 4 and produces water, backwash common conduit.Between vacuum pipe and water production pipeline
The the second connection point 25 formed is located at water production pipeline highest point, between the second connection point and PTFE hollow-fibre membrane and film frame 4
Pipeline forms vacuum, produces water common conduit.
Will pass through pretreated steel wastewater, steel wastewater coolant-temperature gage between 25~40 DEG C, SS be≤200mg/L,
COD is≤150mg/L, contain mineral oil≤10mg/L, total iron≤5mg/L, conductivity≤3500 μ S/cm, by raw water pump 2 from original
It is delivered in pond 1 in film reaction pond 3, is first turned on vacuum valve 14 when water level reaches predetermined position and starts vacuum pump 13,
It is opened after operation 1 minute and produces water pump 6 and close vacuum pump 13 and vacuum valve 14, start normally to produce water.Membrane flux is set in 36L/
M2/h, backwash flux 80L/m2/h, aeration quantity 65Nm3/m2H normally aspirates 39min, air purge 0.5min, air water backwash
1min empties in film reaction pond 3 once every 8h, and every 10 days progress full maintenance chemical cleanings record permeant flux daily,
Transmembrane pressure produces water turbidity.Wherein maintainability chemical cleaning are as follows: NaClO solution sodium hypochlorite metering pump 16 is passed through into backwash
Pipeline is sent into inside the film wire of PTFE hollow-fibre membrane, continuously into medicine 5min, stands 15min, the solution emptying after cleaning；Then
Citric acid solution is sent into inside the film wire of PTFE hollow-fibre membrane with citric acid metering pump 18 by backwash pipeline, continuously into medicine
5min stands 15min, the solution emptying after cleaning；Wherein, concentration of the NaClO solution in film reaction pond 3 is 400ppm；Film
The concentration of citric acid is 800ppm in reaction tank 3.
In the present embodiment, ultrafiltration membrane is PTFE hollow-fibre membrane.
PTFE doughnut film process steel wastewater is utilized in the present embodiment, transmembrane pressure (TMP) absolute value is steady for a long time
Be scheduled on 0.02Mpa hereinafter, and without obvious ascendant trend in operational process, and flux stabilized maintains 36L/m2h.The hollow fibre of PTFE
It ties up membrane flux and transmembrane pressure relationship is as shown in Figure 2.
PTFE doughnut film process steel wastewater is utilized in the present embodiment, production water turbidity value is very low, stablizes and exists
0.03~0.07NTU, and in operational process turbidity without bright fluctuation.The relationship of PTFE hollow-fibre membrane production water turbidity and runing time
As shown in Figure 3.
As transmembrane pressure Cha≤- 0.05Mpa in processing method, restorative chemical cleaning need to be carried out to ultrafiltration membrane, it is restorative
Chemical cleaning are as follows: NaClO solution is sent into film reaction pond 3 by sodium hypochlorite medicament delivery pump 19,1min is aerated, stands
4h, 3 solution of the film reaction pond emptying after cleaning；Then citric acid solution is sent into film reaction by lemon acid treatment delivery pump 21
In pond 3, it is aerated 1min, stands 2h, 3 solution of the film reaction pond emptying after cleaning；Wherein, NaClO solution is in film reaction pond 3
Concentration is 2000ppm；In film reaction pond 3 concentration of citric acid be 10000ppm, processing method after restorative chemical cleaning,
The flux recovery of film is to 100%.
Claims (10)
1. a kind of high-efficient treatment method of steel wastewater, comprising:
Steel wastewater is delivered in film reaction pond, the ultrafiltration membrane in film reaction pond is the hollow-fibre membrane of PTFE material；One
Producing the water period includes producing water, air purge, air water backwash；Film reaction pond concentrate is emptied every 6~15h, and is automatically replenished entrance
Normal filtration program；The period of maintainability chemical cleaning can be determined in operational process according to transmembrane pressure ascendant trend.
2. a kind of high-efficient treatment method of steel wastewater according to claim 1, which is characterized in that the steel wastewater is
By pretreated steel wastewater, SS be≤200mg/L, COD be≤150mg/L, containing mineral oil≤10mg/L, total iron≤
5mg/L, conductivity≤3500 μ S/cm.
3. a kind of high-efficient treatment method of steel wastewater according to claim 1, which is characterized in that the film reaction pond is
Immersed ultrafiltration membrane pond；The aperture of ultrafiltration membrane is 0.05~0.2 μm, and pH use scope is 0~14.
4. a kind of high-efficient treatment method of steel wastewater according to claim 1, which is characterized in that the production water period is
20~100min, production water time are 19~99min, and the air purge time is 0.5~2min, and the air water backwash time is 0.5~2min；Into
For coolant-temperature gage at 1~80 DEG C, maximum backwash pressure is 0.16Mpa；It is 20~60 (L/m2/h) that the ultrafiltration membrane, which produces moisture film flux, instead
Washing flux is 30~120 (L/m2/h).
5. a kind of high-efficient treatment method of steel wastewater according to claim 1, which is characterized in that the maintainability chemistry
Cleaning are as follows: NaClO solution is sent into inside the film wire of ultrafiltration membrane, stands 5~30min, the film reaction pond solution emptying after cleaning；
Then citric acid solution is sent into inside the film wire of ultrafiltration membrane, stands 5~30min, the film reaction pond solution emptying after cleaning；Its
In, concentration of the NaClO solution in film reaction pond is 300~1000ppm；In film reaction pond the concentration of citric acid be 1000~
3000ppm。
6. a kind of high-efficient treatment method of steel wastewater according to claim 1, which is characterized in that in the processing method
As transmembrane pressure Cha≤- 0.05Mpa, restorative chemical cleaning, the restorative chemical cleaning are as follows: by NaClO are carried out to ultrafiltration membrane
Solution is sent into film reaction pond, and 1~2min is aerated, and stands 4~8h, the film reaction pond solution emptying after cleaning；Then by lemon
Acid solution is sent into film reaction pond, and 1~2min is aerated, and stands 2~4h, the film reaction pond solution emptying after cleaning；Wherein,
Concentration of the NaClO solution in film reaction pond is 1500~3000ppm；In film reaction pond the concentration of citric acid be 5000~
20000ppm。
7. a kind of high-efficient treatment method of steel wastewater according to claim 1, which is characterized in that the gas of the ultrafiltration membrane
Scouring air quantity is 40~100Nm3/㎡h。
8. a kind of high-efficient treatment device of steel wastewater, including former pond (1), raw water pump (2), film reaction pond (3), PTFE hollow
Tunica fibrosa and film frame (4) produce water motor-driven valve (5), produce water pump (6), produce pond (7), is backwashing pump (8), accurate filter (9), anti-
Wash motor-driven valve (10), roots blower (11), air inlet motor-driven valve (12), vacuum pump (13), vacuum valve (14), sodium hypochlorite dosing tank
(15), sodium hypochlorite metering pump (16), citric acid dosing tank (17), citric acid metering pump (18), sodium hypochlorite medicament delivery pump
(19), sodium hypochlorite medicine storing pot (20), lemon acid treatment delivery pump (21), citric acid medicine storing pot (22), electric atmospheric relief valve (23),
It is characterized by: the water inlet end of the film reaction pond (3) is connected to by water inlet line and raw water pump (2) with former pond (1), it is described
PTFE hollow-fibre membrane and film frame (4) are installed in film reaction pond (3), and film reaction pond (3) bottom is equipped with electric atmospheric relief valve
(23), the PTFE hollow-fibre membrane and film frame (4) are connected by admission line with roots blower (11), and in admission line
It is equipped with air inlet motor-driven valve (12), the production water side of the film reaction pond (3) is by water production pipeline and produces water pump (6) and produces pond
(7) it is connected to, is equipped between the production water pump (6) and film reaction pond (3) and produces water motor-driven valve (5), the vacuum pump (13) and vacuum
Valve (14) is connected by vacuum pipe with water production pipeline, and the production pond (7) is anti-by backwash pipeline and backwashing pump (8) and film
Ying Chi (3) is connected, and backwash motor-driven valve (10) and accurate filter are equipped between the backwashing pump (8) and film reaction pond (3)
(9)；It is equipped with maintainability between the backwashing pump (8) and accurate filter (9) and cleans chemical feeding points, the sodium hypochlorite dosing tank
(15) chemical feeding points are cleaned with maintainability by pipeline and are connected with sodium hypochlorite metering pump (16), the citric acid dosing tank (17)
Chemical feeding points are cleaned with maintainability by pipeline with citric acid metering pump (18) to be connected；The sodium hypochlorite medicine storing pot (20) and time
Sodium chlorate medicament delivery pump (19) passes through pipeline to film reaction pond (3), the citric acid medicine storing pot (22) and citric acid medicine
Agent delivery pump (21) passes through pipeline to film reaction pond (3).
9. a kind of high-efficient treatment device of steel wastewater according to claim 8, which is characterized in that the backwash pipeline end
End forms the first connection point (24) with the water production pipeline for producing water motor-driven valve (5) front end, and the first connection point (24) is into PTFE
Pipeline between empty fiber membrane and film frame (4), which is formed, produces water, backwash common conduit.
10. a kind of high-efficient treatment device of steel wastewater according to claim 8, which is characterized in that the vacuum pipe
The the second connection point (25) formed between water production pipeline is located at water production pipeline highest point, the second connection point (25) and PTFE
Pipeline between hollow-fibre membrane and film frame (4) forms vacuum, produces water common conduit.
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| CN201810227280.8A CN110304688A (en) | 2018-03-20 | 2018-03-20 | A kind of high-efficient treatment method and its device of steel wastewater |
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| CN201810227280.8A CN110304688A (en) | 2018-03-20 | 2018-03-20 | A kind of high-efficient treatment method and its device of steel wastewater |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110981001A (en) * | 2019-11-26 | 2020-04-10 | 浙江津膜环境科技有限公司 | Immersed high-strength membrane filtration process and system for pretreatment of printing and dyeing wastewater |
| CN112321027A (en) * | 2020-11-21 | 2021-02-05 | 西安西热水务环保有限公司 | Side-stream filtering system and method with multiple cleaning modes |
| CN113926313A (en) * | 2021-11-05 | 2022-01-14 | 广东蓝月环境工程有限公司 | MBR membrane cleaning method for sewage treatment |
| CN116161771A (en) * | 2023-01-03 | 2023-05-26 | 中国石油化工股份有限公司 | Method for improving MBR water yield |
-
2018
- 2018-03-20 CN CN201810227280.8A patent/CN110304688A/en not_active Withdrawn
Cited By (4)
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| CN110981001A (en) * | 2019-11-26 | 2020-04-10 | 浙江津膜环境科技有限公司 | Immersed high-strength membrane filtration process and system for pretreatment of printing and dyeing wastewater |
| CN112321027A (en) * | 2020-11-21 | 2021-02-05 | 西安西热水务环保有限公司 | Side-stream filtering system and method with multiple cleaning modes |
| CN113926313A (en) * | 2021-11-05 | 2022-01-14 | 广东蓝月环境工程有限公司 | MBR membrane cleaning method for sewage treatment |
| CN116161771A (en) * | 2023-01-03 | 2023-05-26 | 中国石油化工股份有限公司 | Method for improving MBR water yield |
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Application publication date: 20191008 |