CN104787926B - Sewage treatment system and sewage treatment method - Google Patents
Sewage treatment system and sewage treatment method Download PDFInfo
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- CN104787926B CN104787926B CN201510145436.4A CN201510145436A CN104787926B CN 104787926 B CN104787926 B CN 104787926B CN 201510145436 A CN201510145436 A CN 201510145436A CN 104787926 B CN104787926 B CN 104787926B
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Abstract
The invention creatively relates to a sewage treatment system and a sewage treatment method. According to the adopted technical scheme, the sewage treatment system is composed of a flocculation tank and a sedimentation tank. According to the flocculation tank, a sewage inlet and a reaction water outlet are formed in a tank body I, and three baffle plates I are arranged in the tank body I to sequentially divide the interior of the tank body I into a cavity I, a cavity II, a cavity III and a cavity IV. According to the sedimentation tank, a reaction water inlet is formed in a tank body II, and three baffle plates II are arranged in the tank body II to divide the interior of the tank body II into a baffling area and a sedimentation area; a polyacrylamide inlet is formed in the baffling area, a sludge hopper is arranged at the lower end of the sedimentation area, a sludge discharging pipe is arranged at the lower end of the sludge hopper, a water distribution plate with a great number of water distribution holes is mounted at the upper end of the sludge hopper, a plurality of inclined plates are mounted on the water distribution plate, and a water drainage outlet is formed in the tank body II. According to the sewage treatment system and the sewage treatment method, the principle of sedimentation and air floatation is adopted, the efficiency of solid-liquid separation is improved to the greatest extent, and the final quality of drained water which is treated is guaranteed.
Description
Technical field
The invention belongs to sewage treatment area, more particularly to a kind of sewage disposal system and processing method.
Background technology
In mechanical processing industry, especially during surface treatment, substantial amounts of industrial wastewater can be produced, these industrial wastewaters
If processed not in time, environment is caused with serious pollution.In prior art, mostly adopt chemical treatment method, exist asks
Topic is：1. because chemical feeding quantity can not possibly be absolute suitable, the heavy metallic salt having fraction will not be flocculated or coacervation, so also
Suspend in water in small granule, be difficult to overcome buoyancy of water and precipitate.Although 2. a part of slaine be flocculated or
Coacervation, but granule is less, less with respect to the difference in specific gravity of water, and the speed of precipitation is slow downwards, the impact on whole current direction
Under, also can be suspended in water during solid-liquid separation and be discharged.
Content of the invention
In order to solve problem above, the purpose of the invention is to provide a kind of structure simple, at the high sewage of wastewater purification efficiency
Reason system.
The another object of the invention provides a kind of sewage water treatment method.
The invention employed technical scheme comprise that：Sewage disposal system, is made up of flocculation basin and sedimentation tank.
Described flocculation basin is：The upper end of cell body I is provided with wastewater inlet and reaction water out, and in cell body I, wastewater inlet one end sets
There are 3 pieces of deflection plates I that chamber I, chamber II, chamber III and chamber IV in cell body I, will be divided into successively, the upper end in chamber I is provided with sodium hydroxide and enters
Mouth, chamber II or chamber III upper end are provided with calcium chloride entrance, and chamber IV upper end is provided with aluminum chloride entrance, is provided with agitating device in the IV of chamber.
Described sedimentation tank is：The upper end of cell body II is provided with reaction water inlet, and in cell body II, reaction water inlet one end is provided with 3 pieces of foldings
Stream plate II is divided into baffling area and settling zone by cell body II；Baffling area upper end is provided with polyacrylamide entrance, and the lower end of settling zone sets
There is sludge bucket, sludge bucket lower end is provided with discharge pipeline, the water dispensing board being formed with some distributing holes is installed in sludge bucket upper end, water dispensing board is pacified
Fill some swash plates, cell body II is provided with discharge outlet.
Above-mentioned sewage disposal system, in cell body II, the upper end of swash plate is by L-type baffle plate I and L-type baffle plate II by upper end in cell body
Be divided into two independent water legs, one end of each water leg is provided with sewage routeway, be located at dissolved air water entrance outside cell body II and
It is located at the corresponding with sewage routeway with the dissolved air water liberation port that dissolved air water entrance is connected of inner side, set at the middle part of each water leg
There is discharge outlet, one mud-collecting slot be set in cell body II upper end outward flange each water leg corresponding, the end of mud-collecting slot is mud discharging mouth,
A corresponding Slag Scraping Device on each water leg, the end of Slag Scraping Device is corresponding with the entrance of mud-collecting slot.
A kind of sewage water treatment method, using above-mentioned sewage disposal system, method is as follows：
1) flocculation treatment：Sewage enters flocculation basin by wastewater inlet, enters in the IV of chamber through chamber I, chamber II and chamber III successively,
Sodium hydroxide is sent into by sodium hydroxide entrance and adjusts pH, send into calcium chloride through calcium chloride entrance and produce cystose,
In the IV of chamber, send into aluminum chloride, stirring through aluminum chloride entrance, produce substantial amounts of flocculence material, containing flocculence thing
The reacted water out of reaction water of matter sends into sedimentation tank；
2) precipitation process：The reacted water inlet of reaction water containing flocculence material enters in cell body II, enters through deflection plate II
Baffling area, adds polyacrylamide in baffling area, enters settling zone after mixing, and partial flocculation shape material sinks to mud
In bucket, sewage continues on through the distributing hole on water dispensing board, along the swash plate on water dispensing board to up, partial sludge or flocculation
Shape material, slides in sludge bucket along under swash plate, continues up sewage and enters in water leg along sewage routeway, with
When, the dissolved air water dissolved with a large amount of microbubbles enters in cell body II through dissolved air water entrance and dissolved air water liberation port, in sewage
Mix with up sewage at passage, bubble is mixed with the little particle impurity in sewage, continue to be up to cell body II's
Upper end, is scraped impurity in mud-collecting slot by Slag Scraping Device, is discharged by mud discharging mouth, and the sewage of purification is discharged through discharge outlet.
Preferably, above-mentioned sewage water treatment method, adds the pH that sodium hydroxide adjusts sewage to be 8-9.Described calcium chloride is
Percentage by weight is the calcium chloride water of 10-30%.Described aluminum chloride is weight percentage water-soluble for 5-15% aluminum chloride
Liquid.Described polyacrylamide is the polyacrylamide solution of 2-10% for concentration expressed in percentage by weight.
The beneficial effect of the invention is：
1) pass through flocculation basin, sewage is fully flocculated and condenses.
2) due to being provided with swash plate in sedimentation tank so that entering flocculence material and the mud not having in the sewage in settling zone to precipitate
When flowing through swash plate, the effect due to gravity is glided further, enters in sludge bucket, reaches secondary precipitation.
3) due to being provided with the dissolved air water entrance corresponding with sewage routeway and dissolved air water liberation port, therefore can discharge big in water leg
The water dissolved with fine gas bubbles of amount, these molten alveolate water can be not have the suspension of flocculation or coacervation in active adsorption sewage
Thing and the less flocculence material not having to precipitate and glide of granule, and carry the upper end floating to cell body II, through scraping slag
Machine is scraped in mud-collecting slot and is discharged, and reaches the effect of three blowdowns, thus effectively having purified sewage.
4) the invention is mainly characterized by the sewage after coagulating and flocculate through helping, in the link of solid-liquid separation, using comprehensive
Design principle, on the premise of not increasing floor space and space, employs precipitation and pneumatically supported principle, to greatest extent
Improve the efficiency of solid-liquid separation it is ensured that process after outer draining final water quality.
5) the invention carries out breakdown of emulsion by adding calcium chloride, produces macroscopic float in water, by adding polymerization chlorine
Change aluminum, make float coacervation.
Brief description
Fig. 1 is the structural representation of the invention.
Fig. 2 is the structural representation of water dispensing board.
Specific embodiment
Embodiment 1 sewage disposal system
As shown in figure 1, sewage disposal system, it is made up of flocculation basin and sedimentation tank.
Described flocculation basin is：The upper end of cell body I (1) is provided with wastewater inlet (2) and reaction water out (3), cell body I
(1) interior wastewater inlet (2) one end is provided with 3 pieces of deflection plates I (4) and is divided into chamber I (5), chamber II by cell body (1) successively
(6), chamber III (7) and chamber IV (8), the upper end in chamber I (5) is provided with sodium hydroxide entrance (9), chamber II (6) or chamber III
(7) upper end is provided with calcium chloride entrance (10), and chamber IV (8) upper end is provided with aluminum chloride entrance (11), and chamber IV is provided with (8)
Agitating device (12).
Described sedimentation tank is：The upper end of cell body II (13) is provided with reaction water inlet (14), the interior reaction water of cell body II (13)
Entrance (14) one end is provided with 3 pieces of deflection plate II (15) and is divided into baffling area (16) and settling zone by cell body II (13)
(17)；Baffling area (16) upper end is provided with polyacrylamide entrance (18), and the lower end of settling zone (17) is provided with sludge bucket
(19), sludge bucket (19) lower end is provided with discharge pipeline (26), and sludge bucket (19) upper end is installed and is formed with some distributing holes (21)
Water dispensing board (20), water dispensing board (20) is upper to install some swash plates (22), and cell body II (13) is provided with discharge outlet (30).
In cell body II (13), the upper end of swash plate (22) is by L-type baffle plate I (23) and L-type baffle plate II (24) by cell body
Upper end is divided into two independent water legs (25), and one end of each water leg (25) is provided with sewage routeway (27), is located at cell body
Dissolved air water entrance (28) outside II (13) and the dissolved air water liberation port being connected with dissolved air water entrance (28) being located at inner side
(29) corresponding with sewage routeway (27), it is provided with discharge outlet (30) at the middle part of each water leg (25), in cell body II
(13) (31, the end of mud-collecting slot (31) is spoil disposal to upper end outward flange corresponding each water leg (25) one mud-collecting slot of setting
Mouth (32), the upper corresponding Slag Scraping Device (33) of each water leg (25), the end of Slag Scraping Device (33) and mud-collecting slot (31)
Entrance correspond to.
Embodiment 2 sewage water treatment method
Using the sewage disposal system of embodiment 1, method is as follows：
1. flocculation treatment：Sewage enters flocculation basin by wastewater inlet (2), successively through chamber I (5), chamber II (6) and chamber III
(7) enter in chamber IV (8), send into sodium hydroxide to adjust pH by sodium hydroxide entrance (9) is 8-9, through chlorination
Calcium entrance (10) sends into the calcium chloride water that percentage by weight is 20%, produces cystose, in chamber IV (8),
Send into the aluminum chloride aqueous solution that percentage by weight is 10%, stirring through aluminum chloride entrance (11), produce substantial amounts of flocculence
Material, the reacted water out of the reaction water containing flocculence material (3) sends into sedimentation tank.
2. precipitation process：The reacted water inlet of reaction water containing flocculence material (14) enters in cell body II (13), through baffling
Plate II (15) enters baffling area (16), adds, in baffling area (16), the polyacrylamide that concentration expressed in percentage by weight is 5%,
Settling zone (17) is entered, partial flocculation shape material sinks in sludge bucket (19), and sewage continues on through water dispensing board after mixing
(20) distributing hole (21) on, along the swash plate (22) on water dispensing board (20) to up, partial sludge or flocculence
Material, slides in sludge bucket along under swash plate, continues up sewage and enters water leg (25) along sewage routeway (27)
In, meanwhile, the dissolved air water dissolved with a large amount of microbubbles enters pond through dissolved air water entrance (28) and dissolved air water liberation port (29)
In body II (13), mix with up sewage at sewage routeway (27) place, bubble is mixed with the little particle impurity in sewage
Close, continue to be up to the upper end of cell body II (13), scraped impurity in mud-collecting slot (31) by Slag Scraping Device (33), by
Mud discharging mouth (32) is discharged, and the sewage of purification is discharged through discharge outlet (30).
Treatment effect：After adopting above-mentioned sewage disposal system to process in the sewage containing Organic substance (COD3000mg/l), to discharge
After water sampling, standing, supernatant is analyzed, the COD of final water is 150-180mg/l, by the change to final water sample
Test analysis, finally the content of the float in discharge water substantially reduces, and final water quality can meet the requirement of environmental protection.
Claims (6)
1. sewage disposal system it is characterised in that：It is made up of flocculation basin and sedimentation tank；
Described flocculation basin is：The upper end of cell body I (1) is provided with wastewater inlet (2) and reaction water out (3), cell body I
(1) interior wastewater inlet (2) one end be provided with 3 pieces of deflection plates I (4) successively by be divided in cell body (1) chamber I (5),
Chamber II (6), chamber III (7) and chamber IV (8), the upper end in chamber I (5) is provided with sodium hydroxide entrance (9), chamber II (6)
Or chamber III (7) upper end is provided with calcium chloride entrance (10), chamber IV (8) upper end is provided with aluminum chloride entrance (11), chamber IV
(8) it is provided with agitating device (12) in；
Described sedimentation tank is：The upper end of cell body II (13) is provided with reaction water inlet (14), and the interior reaction water of cell body II (13) enters
Mouth (14) one end is provided with 3 pieces of deflection plates II (15) and is divided into baffling area (16) and settling zone by cell body II (13)
(17)；Baffling area (16) upper end is provided with polyacrylamide entrance (18), and the lower end of settling zone (17) is provided with sludge bucket
(19), sludge bucket (19) lower end is provided with discharge pipeline (26), and sludge bucket (19) upper end is installed and is formed with some distributing holes
(21) water dispensing board (20), water dispensing board (20) is upper to install some swash plates (22), and cell body II (13) is provided with draining
Mouth (30)；
In cell body II (13), the upper end of swash plate (22) is by L-type baffle plate I (23) and L-type baffle plate II (24) by cell body
Upper end is divided into two independent water legs (25), and one end of each water leg (25) is provided with sewage routeway (27), is located at
Dissolved air water entrance (28) outside cell body II (13) and the molten gas being connected with dissolved air water entrance (28) being located at inner side
Water liberation port (29) is corresponding with sewage routeway (27), is provided with discharge outlet at the middle part of each water leg (25)
(30), a mud-collecting slot (31) is set in cell body II (13) upper end outward flange corresponding each water leg (25), collects mud
The end of groove (31) is mud discharging mouth (32), the upper corresponding Slag Scraping Device (33) of each water leg (25), Slag Scraping Device
(33) end is corresponding with the entrance of mud-collecting slot (31).
2. sewage water treatment method is it is characterised in that using the sewage disposal system described in claim 1, method is as follows：
1) flocculation treatment：Sewage enters flocculation basin by wastewater inlet (2), successively through chamber I (5), chamber II (6) and chamber
III (7) enters in chamber IV (8), sends into sodium hydroxide by sodium hydroxide entrance (9) and adjusts pH, through chlorination
Calcium entrance (10) is sent into calcium chloride and is produced cystose, in chamber IV (8), sends into chlorine through aluminum chloride entrance (11)
Change aluminum, stirring, produce substantial amounts of flocculence material, the reacted water out of the reaction water containing flocculence material (3)
Send into sedimentation tank；
2) precipitation process：The reacted water inlet of reaction water containing flocculence material (14) enters in cell body II (13), warp
Deflection plate II (15) enters baffling area (16), adds polyacrylamide in baffling area (16), and it is heavy to enter after mixing
Shallow lake area (17), partial flocculation shape material sinks in sludge bucket (19), and sewage continues on through joining on water dispensing board (20)
Water hole (21), along the swash plate (22) on water dispensing board (20) to up, partial sludge or flocculence material, along tiltedly
Slide under plate in sludge bucket, continue up sewage and enter in water leg (25) along sewage routeway (27), with
When, the dissolved air water dissolved with a large amount of microbubbles enters cell body through dissolved air water entrance (28) and dissolved air water liberation port (29)
In II (13), mix with up sewage at sewage routeway (27) place, the little particle impurity in bubble and sewage
Mixing, continues to be up to the upper end of cell body II (13), is scraped impurity into mud-collecting slot (31) by Slag Scraping Device (33)
In, discharged by mud discharging mouth (32), the sewage of purification is discharged through discharge outlet (30).
3. sewage water treatment method according to claim 2 it is characterised in that：The pH that sodium hydroxide adjusts sewage is added to be 8-
9.
4. sewage water treatment method according to claim 2 it is characterised in that：Described calcium chloride is weight percentage as 10-
30% calcium chloride water.
5. sewage water treatment method according to claim 2 it is characterised in that：Described aluminum chloride is weight percentage as 5-
15% aluminum chloride aqueous solution.
6. sewage water treatment method according to claim 2 it is characterised in that：Described polyacrylamide is concentration expressed in percentage by weight
Polyacrylamide solution for 2-10%.
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| CN106045120A (en) * | 2016-07-12 | 2016-10-26 | 佛山杰致信息科技有限公司 | Sewage treatment method |
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| CN107188344B (en) * | 2017-05-10 | 2020-10-23 | 安阳工学院 | Sewage treatment device and sewage treatment method |
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| CN110092504A (en) * | 2019-05-20 | 2019-08-06 | 浙江天行健水务有限公司 | A kind of sludge desliming water post-processing approach |
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Inventor after: Zhao Lijun Inventor after: Xu Shanwen Inventor before: Chen Yingxin Inventor before: Zhang Yanyan Inventor before: Cui Duo Inventor before: Sun Bojun |
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Effective date of registration: 20161117 Address after: 100094, No. 3, building, No. 3, Feng Xiu Middle Road, Beijing, Haidian District Applicant after: SHENGDA ENVIRONMENT ENGIEERING CO., LTD. Address before: Ling Bei Jie Huanggu District of Shenyang City, Liaoning Province, No. 1 110034 Applicant before: Shenyang aircraft industry (Group) Co., Ltd. |
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