CN107399885B - Purification system with backwash coagulation cyclone filtration and method thereof - Google Patents
Purification system with backwash coagulation cyclone filtration and method thereof Download PDFInfo
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- CN107399885B CN107399885B CN201710859448.2A CN201710859448A CN107399885B CN 107399885 B CN107399885 B CN 107399885B CN 201710859448 A CN201710859448 A CN 201710859448A CN 107399885 B CN107399885 B CN 107399885B
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- 238000001914 filtration Methods 0.000 title claims abstract description 74
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000000746 purification Methods 0.000 title claims abstract description 33
- 238000005345 coagulation Methods 0.000 title claims abstract description 13
- 230000015271 coagulation Effects 0.000 title claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 185
- 238000005189 flocculation Methods 0.000 claims abstract description 98
- 230000016615 flocculation Effects 0.000 claims abstract description 95
- 239000006247 magnetic powder Substances 0.000 claims abstract description 91
- 238000000926 separation method Methods 0.000 claims abstract description 59
- 239000000463 material Substances 0.000 claims abstract description 44
- 238000011010 flushing procedure Methods 0.000 claims abstract description 42
- 230000008021 deposition Effects 0.000 claims abstract description 40
- 239000000701 coagulant Substances 0.000 claims abstract description 33
- 238000005728 strengthening Methods 0.000 claims abstract description 30
- 239000010865 sewage Substances 0.000 claims abstract description 29
- 239000003344 environmental pollutant Substances 0.000 claims abstract description 28
- 231100000719 pollutant Toxicity 0.000 claims abstract description 28
- 238000004064 recycling Methods 0.000 claims description 35
- 239000002893 slag Substances 0.000 claims description 29
- 239000002245 particle Substances 0.000 claims description 22
- 238000007599 discharging Methods 0.000 claims description 21
- 239000010802 sludge Substances 0.000 claims description 20
- 239000003814 drug Substances 0.000 claims description 16
- 238000011084 recovery Methods 0.000 claims description 16
- 239000013049 sediment Substances 0.000 claims description 16
- 239000006148 magnetic separator Substances 0.000 claims description 13
- 239000000356 contaminant Substances 0.000 claims description 10
- 239000000945 filler Substances 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 230000005484 gravity Effects 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 9
- 230000015556 catabolic process Effects 0.000 claims description 7
- 238000006731 degradation reaction Methods 0.000 claims description 7
- 238000001179 sorption measurement Methods 0.000 claims description 7
- 239000000919 ceramic Substances 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 3
- 239000006004 Quartz sand Substances 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 229910021536 Zeolite Inorganic materials 0.000 claims description 3
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims description 3
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 3
- 239000001110 calcium chloride Substances 0.000 claims description 3
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 3
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 229920002401 polyacrylamide Polymers 0.000 claims description 3
- 239000011435 rock Substances 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 claims description 3
- 239000010457 zeolite Substances 0.000 claims description 3
- 208000034699 Vitreous floaters Diseases 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 14
- 238000004062 sedimentation Methods 0.000 description 12
- 239000000470 constituent Substances 0.000 description 4
- 230000003311 flocculating effect Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- 230000000813 microbial effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 206010017472 Fumbling Diseases 0.000 description 1
- 241000282414 Homo sapiens Species 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000011001 backwashing Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000010840 domestic wastewater Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
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- 239000010842 industrial wastewater Substances 0.000 description 1
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- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
Classifications
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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
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
-
- 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
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
- C02F1/488—Treatment of water, waste water, or sewage with magnetic or electric fields for separation of magnetic materials, e.g. magnetic flocculation
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
-
- 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
- C02F2303/16—Regeneration of sorbents, filters
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
Abstract
The invention provides a purification system and a purification method for coagulation cyclone filtration with back flushing, wherein the purification system comprises a magnetic strengthening flocculation device and a vortex deposition separation device with back flushing; the water inlet of the magnetic reinforced flocculation device is arranged on the side wall of the flocculation main body, and magnetic powder, an inorganic coagulant and an organic flocculant are sequentially added, so that pollutants in water can be coagulated one by one in stages to form floccules; the water outlet pipeline of the flocculation device is inserted into the inner wall of the biological filter material layer in a tangential manner with the circumferential body of the biological filter material layer; the vortex deposition separation device with the back flushing function divides the separation device body into a back flushing water inlet area and a cyclone filtering area through the biological filter material layer. The invention can remove suspended matters, greasy dirt, floaters and other matters in the sewage greatly, and simultaneously the process method greatly reduces the occupation of land.
Description
Technical Field
The invention belongs to the technical field of water treatment equipment, relates to a high-efficiency purification system for continuously treating sewage and a method thereof, and particularly relates to a purification system with backwash coagulation cyclone filtration for magnetic enhanced flocculation and vortex deposition separation and a method thereof.
Background
With the rapid development of human beings, forests, wetlands, grasslands and the like in natural areas are continuously replaced by roads, squares, buildings and the like, and the scale of cities is continuously expanding, so that the problems of urban hydrology, water quality, water resources and the like are increasingly prominent. The sewage mainly comprises domestic sewage, industrial wastewater and initial rainwater. A large number of researches show that the particles are main carriers of various pollutants in the sewage, play roles in early stage pollutant adsorption, middle stage pollutant transportation and later stage pollutant sedimentation release in the sewage, and meanwhile, the particles are important water quality indexes for influencing the transparency and turbidity of the water body.
While domestic wastewater treatment is being put into progress in developed countries, further fumbling and attempts are needed. Domestic sewage treatment measures mainly comprise two types: a filtration interception method and a natural sedimentation method. The filtering interception method is to construct a plurality of filtering systems manually, introduce the sewage into the filtering systems for simple filtering treatment, such as adopting different stages of stone-matched blind ditches or perforated concrete filter plates, and the like for simple filtering of the sewage. The filtering interception method has the defects that a filtering interception system is easy to block and lose efficacy, cleaning service is difficult after losing efficacy, and the like. The natural sedimentation method is to construct a sewage regulating and accumulating tank, discharge sewage into the regulating and accumulating tank and remove pollutants in the sewage through gravity sedimentation. But has the problems of large occupied area of the sewage regulating and accumulating tank, large manual cleaning difficulty, incapability of continuous operation and the like.
Disclosure of Invention
In order to solve the problem of separating pollutants in sewage containing suspended matters, greasy dirt or floating matters and the like, the invention provides a purification system with back flushing and coagulation cyclone filtration and a method thereof. The flocculation, vortex, filtration and microbial degradation technology is combined to be applied to the sewage treatment device, the separation of pollutants in the sewage is enhanced through the flocculation, vortex and filtration technology, the separated pollutants are further degraded and removed through the microbial technology, suspended matters, greasy dirt, floaters and other substances in the sewage can be removed greatly through the process, and meanwhile, the occupation of land is greatly reduced through the process. The technical scheme adopted for solving the technical problems is as follows:
a purification system with back flushing coagulation cyclone filtration comprises a magnetic strengthening flocculation device and a vortex deposition separation device with a back flushing function; the magnetic strengthening flocculation device comprises a water inlet 1, a flocculation main body and a medicament supply device, wherein the water inlet 1 is positioned on the side wall of the flocculation main body, the medicament supply device comprises 3 medicament adding ports arranged on the top of the flocculation main body, and the 3 medicament adding ports are a magnetic powder adding port 2, an inorganic coagulant adding port 3 and an organic flocculant adding port 4 respectively; the magnetic powder adding inlet 2, the inorganic coagulant adding inlet 3 and the organic flocculant adding inlet 4 are sequentially arranged on the flocculation main body according to the water flow direction; the water outlet pipeline is positioned on the side wall of the flocculation main body opposite to the water inlet 1; the vortex deposition separation device with the back flushing function comprises a shell 5, a biological filter material layer 16, a vortex water outlet 10 and a slag discharge port 15; the biological filter material layers 16 are arranged in the shell 5 at intervals and divide the main body of the separation device into two areas, the area between the biological filter material layers 16 and the shell 5 is a back flushing water inlet area, and a rotational flow filtering area is arranged inside the biological filter material layers 16; the backwash water inlet 21 is arranged at the top of the backwash water inlet region; the water outlet pipeline of the flocculation device is inserted into the inner wall of the biological filter layer 16 to be fixed in a tangential manner with the circumferential body of the biological filter layer 16; a guide cylinder 6 is also arranged in the cyclone filtering area, water flow forms vortex between the biological filter material layer 16 and the outer cylinder of the guide cylinder 6, and a vortex water outlet 10 is arranged at the upper part of the guide cylinder 6; the bottom of the vortex deposition separation device is provided with a slag discharging port 15.
Preferably, the bottom of the side wall of the magnetic strengthening flocculation device opposite to the water inlet 1 is also provided with a magnetic powder recovery port 25; the purification system also comprises magnetic powder recycling equipment, the magnetic powder recycling equipment comprises a magnetic separator 17 and a recycling pipeline 18, the magnetic powder recycling port 25 of the magnetic strengthening flocculation device is communicated with the magnetic separator 17 through the slag discharging port 15 of the vortex deposition separation device, and the magnetic powder outlet of the magnetic separator 17 is communicated with the magnetic powder feeding port 2 through the recycling pipeline 18 for recycling; the preferred magnetic powder recycling device can be directly connected with the magnetic powder recycling port 25 and the slag discharging port 15, and the sludge discharged from the magnetic powder recycling port 25 and the slag discharging port 15 can be conveyed to the magnetic powder recycling device for operation through the conveying device.
Preferably, the guide cylinder 6 further comprises an inner cylinder 8 and an outer cylinder 9, the guide cylinder outer cylinder 9 is in a shape of a truncated cone with a small upper part and a big lower part, an included angle between a truncated cone bus formed by the guide cylinder outer cylinder 9 and a high line of the truncated cone bus is smaller than 10 degrees, and preferably, the included angle is 3 degrees or 5 degrees; the guide cylinder inner cylinder 8 is cylindrical.
Preferably, a deflector 12 is further disposed inside the vortex deposition separation device, and the deflector 12 is located below the guide cylinder 6, so as to form a deposit collecting region 13 below the deflector 12; the bottom of the guide plate 12 is provided with a downward surface, and a sludge collecting opening 14 is arranged at the bottom of the guide plate, and the pollutants deposited on the inner wall of the shell 5 are guided to the sludge collecting opening 14 along the downward surface of the guide plate 12, and enter a sediment collecting area 13 through the sludge collecting opening 14.
Preferably, the magnetic powder adding port 2 extends into the upper part of the flocculation main body, the inorganic coagulant adding port 3 extends into the lower part of the flocculation main body, and a straight baffle plate 23 extending downwards from the top of the flocculation main body is arranged between the magnetic powder adding port 2 and the inorganic coagulant adding port 3; the organic flocculant adding port 4 extends into the upper part of the flocculation main body; the magnetically enhanced flocculation device further includes an L-shaped baffle 24, the vertical section of the L-shaped baffle 24 being located between the inorganic coagulant addition port and the organic coagulant addition port.
Preferably, the vortex deposition separation device further comprises a total water outlet pipeline 11, wherein the total water outlet pipeline 11 is respectively communicated with the vortex water outlet 10 and the filtering water outlet 7, so that sewage for removing pollutants and water after back flushing and filtering are discharged outwards through the total water outlet pipeline 11; the bottom parts of the magnetic strengthening flocculation device and the vortex deposition separation device are respectively provided with surfaces which are inclined downwards towards the slag discharging port 15 and the magnetic powder recovery port 25.
Preferably, the biological filter layer 16 comprises an inner layer and an outer layer, the inner layer is a small-particle biological filter layer 19, and the outer layer is a large-particle biological filter layer 20; preferably, the small-particle biological filter layer 19 is composed of any one or two of quartz sand and microporous ceramic grains, and the large-particle biological filter layer 20 is formed by mixing any one or more of zeolite, volcanic rock and macroporous ceramic grains.
Preferably, the biological filter material layer 16 is further provided with a filter water outlet 7, the filter water outlet 7 is positioned below the vortex water outlet 10, the inner wall of the biological filter material layer 16 at the opposite side of the backwash water inlet 21 extends outside the separation device, and preferably a filter water outlet valve 22 is further arranged at the filter water outlet 7.
Preferably, the medicament supply apparatus further comprises an automatic feeding device; the addition amounts of the magnetic powder, the inorganic coagulant and the organic flocculant are automatically controlled according to the flow of water; and/or the adding proportion of the magnetic powder, the inorganic coagulant and the organic flocculant is automatically adjusted according to the water flow;
preferably, the magnetic powder is, for example, a magnetic powder including ferroferric oxide; the inorganic coagulant can be one or a mixture of more of aluminum salt, ferric salt and calcium chloride; the organic flocculant can be high molecular organic matters such as polyacrylamide, derivatives thereof and the like.
Preferably, the vortex deposition separation device is a cylindrical barrel, and the height of the cylindrical barrel is 1.5-3 times of the diameter of the bottom surface of the cylindrical barrel; preferably, the height of the cylindrical barrel is 2 times or 2.5 times the diameter of its bottom surface.
Preferably, the water outlet pipeline of the flocculation device is obliquely downwards arranged on the shell (5) of the vortex deposition separation device; preferably, the included angle between the water outlet pipeline of the flocculation device and the horizontal plane is smaller than 30 degrees; more preferably, the angle between the water outlet pipe and the horizontal plane is 5 °,10 ° or 15 °.
In addition, the invention also provides a purification method of the coagulation cyclone filtration with back flushing, which comprises a magnetic strengthening flocculation step, a cyclone strengthening filtration step and a back flushing step; the magnetic strengthening flocculation step comprises the following steps: introducing water into a flocculation device from a water inlet 1 of a flocculation main body, mixing the water with added magnetic powder, an inorganic flocculant and an organic flocculant in the flocculation main body in sequence, and carrying out flocculation reaction, wherein the mixing positions and stages of different agents and sewage are different; the water body subjected to the magnetic strengthening flocculation process is tangentially guided to the vortex deposition separation device, so that the water body enters the separation device main body along a mode tangential to the circumference of the vortex deposition separation device; the cyclone reinforced filtering step comprises the following steps: the water tangentially enters a cyclone filtering area defined by the biological filter material layer 16, a vortex is formed in the cyclone filtering area, and a guide cylinder 6 is arranged in the cyclone filtering area to strengthen the vortex rotation; contaminants collected near the inner wall of the biological filter layer 16 are deposited to the deposit collecting area 13 by gravity and discharged from the slag discharging port 15; the water body with the pollutants removed enters the guide cylinder 6 and is discharged from the vortex water outlet 10 of the guide cylinder 6; when the bio-filler layer is clogged or when it is operated for a certain time, a back flushing step is performed to flush away contaminants deposited in the bio-filter layer 16, thereby improving adsorption degradation efficiency.
Preferably, the back flushing step comprises: clean water is introduced into the back flush water inlet area from the back flush water inlet 21, flows through the biological filter layer 16, washes away dirt in the biological filter layer 16, enters the cyclone filter area, and sediments such as sludge are settled in the sediment collecting area and discharged through the slag discharging port, and clean water on the upper layer is discharged from the filter water outlet 7 after back flushing.
Preferably, the purifying method may further include a magnetic powder recovery step of transferring the contaminants discharged from the magnetic powder recovery port 25 provided at the bottom of the magnetic strengthening flocculation device and the slag discharge port 15 of the vortex deposition separation device to the magnetic powder recovery apparatus, and separating the magnetic powder from the contaminants by the magnetic separator 17 and returning the separated magnetic powder to the magnetic powder inlet 2 for recycling.
Compared with the prior art, the invention has the following beneficial effects:
(1) The system can remove most pollutants (including tiny particles and dissolved substances) in the water body due to the addition of flocculation, and the water quality of the effluent is good;
(2) Due to the addition of the magnetic powder, flocculation is enhanced, so that flocculation sedimentation time is greatly reduced, and treatment efficiency is improved;
(3) The flocculation reagent is added automatically, so that the operation and running process of the system is greatly simplified;
(4) Due to the effect of vortex sedimentation, the separation effect of particles in the water body is stronger than that of general gravity sedimentation, and the purification effect and the treatment efficiency of the water body are further improved; the vortex deposition separation device is arranged above the sediment collection area, and the vortex and gravity sedimentation are arranged up and down, so that the overall height of the water purification system is increased, the purification treatment capacity of the water body is increased, and the occupied area of the purification system is greatly reduced;
(5) The inner wall of the cyclone part is provided with a layer of biological filter material layer, so that the adsorption and capture effect of the filter material layer can greatly improve the purification effect of water, and meanwhile, the biological degradation effect of the biological filter material layer can further improve the quality of effluent;
(6) The biological filler layer is not easy to be blocked due to the scouring effect of vortex flow, so that the backwashing process of the biological filler layer is greatly reduced;
(7) The oxygen content in the water body is increased by the vortex effect of the biological filler layer, so that the degradation effect of the biological film on the biological filler layer is greatly enhanced, and the water body purifying effect is further improved;
(8) The process has a back flushing system, which can greatly prolong the service life of the biological filler layer, and the back flushing is a uniform flushing process, so that the biological film on the biological filler layer can be maximally reserved in the flushing filler process, and simultaneously the flushed sludge passes through a vortex system, so that the flushed sewage is further purified, and the final sludge is deposited at the bottom of the equipment and is discharged through cleaning or other modes.
(9) The magnetic powder is separated and recycled, so that the system has good environmental and economic benefits.
Drawings
The present invention will be described in detail below with reference to the drawings and examples.
FIG. 1 is a schematic front view of a purification system with back flush, coagulated cyclone filtration
FIG. 2 is a schematic cross-sectional view of a purification system with back-flush, coagulated cyclone filtration
In the figure: 1 water inlet, 2 magnetic powder inlet, 3 inorganic coagulant inlet, 4 organic flocculant inlet, 5 shell, 6 guide cylinder, 7 filtering water outlet, 8 inner cylinder, 9 outer cylinder, 10 vortex water outlet, 11 total water outlet pipeline, 12 guide plate, 13 sediment collecting area, 14 mud collecting port, 15 slag discharging port, 16 biological filter layer, 17 magnetic separator, 18 recycling pipeline, 19 small particle biological filter layer, 20 large particle biological filter layer, 21 back flushing water inlet, 22 filtering water outlet valve, 23 straight baffle plate, 24L baffle plate, 25 magnetic powder recovery port.
Detailed Description
The technical scheme of the invention is further described in detail below with reference to the accompanying drawings and examples.
As shown in fig. 1 and 2, a purification system for coagulation cyclone filtration with back flushing comprises a magnetic strengthening flocculation device and a vortex deposition separation device with back flushing function.
The magnetic strengthening flocculation device comprises a water inlet 1, a flocculation main body and a medicament supply device, wherein the water inlet 1 is positioned on the side wall of the flocculation main body, the medicament supply device comprises 3 medicament adding ports arranged on the top of the flocculation main body, and the 3 medicament adding ports are a magnetic powder adding port 2, an inorganic coagulant adding port 3 and an organic flocculant adding port 4 respectively. The magnetic powder inlet 2, the inorganic coagulant inlet 3 and the organic flocculant inlet 4 are arranged on the flocculation main body in the water flow direction sequence. The magnetic powder adding port 2 extends into the upper part of the flocculation main body, the inorganic coagulant adding port 3 extends into the lower part of the flocculation main body, a straight baffle plate 23 extending downwards from the top of the flocculation main body is arranged between the magnetic powder adding port 2 and the inorganic coagulant adding port 3, and the height of the straight baffle plate 23 is larger than the height of the inorganic coagulant extending into the flocculation main body. The organic flocculant adding port 4 extends into the upper part of the flocculation main body. The magnetically enhanced flocculation device further comprises an L-shaped baffle plate 24, wherein the vertical section of the L-shaped baffle plate 24 is positioned between the inorganic coagulant adding port and the organic coagulant adding port, the top end of the vertical section is at a certain distance from the top of the flocculation main body so as to enable water to flow to a water outlet pipeline, the water outlet pipeline is positioned on the side wall of the flocculation main body opposite to the water inlet, and the horizontal section of the L-shaped baffle plate 24 is positioned below the water outlet pipeline so as to limit water to flow out through the water outlet pipeline. The straight baffles 23 and the L-shaped baffles serve to define the passage and direction of the water flow, provide adequate path and time for mixing the water flow and the agent, are more evenly mixed, and have more complete flocculation reaction. Firstly, magnetic powder is added into water flow to provide favorable reaction conditions for subsequent flocculation reaction. Then, an inorganic coagulant and an organic coagulant are sequentially added, so that pollutants in water can be coagulated one by one in stages to form floccules. The magnetic powder is, for example, a magnetic powder including ferroferric oxide. The inorganic coagulant may be one or a mixture of several of aluminum salt, ferric salt and calcium chloride. The organic flocculant can be high molecular organic matters such as polyacrylamide, derivatives thereof and the like. The coagulant and the flocculant are added into the water to polymerize the particles which are difficult to precipitate in the water to form a floccule. The flocculating constituent has strong adsorption capacity, can adsorb suspended matters, and can adsorb partial bacteria and soluble substances, and the flocculating constituent is combined with impurities in the water body to form larger flocculating constituent. The flocculating constituent is increased in volume and is sunk through adsorption, so that the pollutants in the water are primarily removed. The magnetic powder can strengthen the reaction inside flocculation, and greatly improves the sedimentation rate of pollutants.
The medicament supply device also comprises automatic feeding equipment, and the addition amounts of the magnetic powder, the inorganic coagulant and the organic flocculant are automatically controlled according to the flow of water. In addition, considering the influence of the water flow speed on the flocculation sedimentation action time, the adding proportion of the magnetic powder, the inorganic coagulant and the organic flocculant is automatically adjusted according to the water flow, so that the intelligent agent adding is realized, the operation and running steps of the magnetic strengthening flocculation device are greatly simplified, and not only is the labor cost saved, but also the running cost is saved.
Further, the water outlet pipeline of the magnetic strengthening flocculation device is obliquely downwards arranged on the shell 5 of the vortex deposition separation device, so that water flow and formed floccules can smoothly flow to the vortex deposition separation device, and blockage is avoided. Preferably, the outlet conduit is at an angle of less than 30 ° to the horizontal, more preferably the angle may be 5 °,10 °, or 15 °. As shown in fig. 2, the water outlet pipeline is tangential to the main body of the vortex deposition separation device in the circumferential direction and is inserted into the main body, and sewage enters the main body in the tangential direction of the separation device shell 5 to form vortex flow.
The vortex deposition separation device with the back flushing function comprises a shell 5, a biological filter material layer 16, a vortex water outlet 10 and a slag discharge port 15. The biological filter material layer 16 is arranged in the shell 5 at intervals and divides the main body of the separation device into two areas, the area between the biological filter material layer 16 and the shell 5 is a back flushing water inlet area, and the inside of the biological filter material layer 16 is a cyclone filtering area. A backwash water inlet 21 is provided at the top of the backwash water inlet zone. The water outlet pipeline of the flocculation device is connected to the biological filter material layer 16 obliquely downwards and is communicated with the cyclone filtering area. The backwash water inlet port 21 and the water outlet conduit are on the same side of the separation device. The water outlet pipeline is inserted into the inner wall of the biological filter material layer 16 in a tangential manner with the circumferential body of the biological filter material layer 16 and is fixed, so that water flows into a rotational flow filtering area in the biological filter material layer 16 to form a vortex state. A guide cylinder 6 is also arranged in the cyclone filtering area, the guide cylinder 6 is positioned at the upper part of the cyclone filtering area, and the corresponding position of the water outlet pipeline. The cartridge 6 is mounted inside the bio-filter layer 16 by a support means (not shown). The guide cylinder 6 comprises an inner cylinder 8, an outer cylinder 9 and a vortex water outlet 10. Annular spaces are respectively formed among the biological filter material layer 16, the guide cylinder outer cylinder 9 and the inner cylinder 8, water enters the cyclone filtering area along the tangential direction of the biological filter material layer 16, a vortex state is formed between the biological filter material layer 16 and the guide cylinder outer cylinder 9 and between the guide cylinder outer cylinder 9 and the inner cylinder 8, and the centrifugal effect of the water in the separation device main body is further increased due to the arrangement of the guide cylinder 6. Under the action of centrifugal force, sludge in the water body is separated, firstly, the sludge is gathered near the inner wall of the biological filter layer 16, and is deposited downwards along the inner wall of the biological filter layer 16 under the action of gravity; the water body with the pollutants removed enters an annular space between the guide cylinder outer cylinder 9 and the guide cylinder inner cylinder 8 from the opening at the lower part of the guide cylinder 6, and moves to the vortex water outlet 10 to be discharged after ascending spirally. The vortex water outlet 10 is positioned at one side of the upper part of the guide cylinder outer cylinder 9, which is far away from the water outlet pipeline. The guide cylinder outer cylinder 9 is in a round table shape with a small upper part and a large lower part, so that water body can perform spiral descending movement in a cyclone filtering area of the vortex deposition separation device, and separated water can enter a space between the guide cylinder outer cylinder and the inner cylinder through the lower part of the guide cylinder 6. Preferably, the included angle between the truncated cone generatrix formed by the guide cylinder outer cylinder 9 and the altitude line is smaller than 10 degrees, more preferably, the included angle can be 3 degrees or 5 degrees. The guide cylinder inner cylinder 8 is cylindrical, so that water body spirally ascends between the guide cylinder inner cylinder 8 and the outer cylinder 9 and is discharged from the vortex water outlet 10.
A deflector 12 is also arranged in the cyclone filtering area, and the deflector 12 is positioned at the lower part of the main body below the guide cylinder 6, so that a sediment collecting area 13 is further formed in the cyclone filtering area below the deflector 12. The bottom of the baffle 12 has a downward surface, and a sludge collection port 14 is formed in the bottom of the baffle, and contaminants deposited on the inner wall of the biological filter layer 16 are guided to the sludge collection port 14 along the downward surface of the baffle 12, and enter the sediment collection area 13 through the sludge collection port 14. A slag discharge port 15 is also provided on the sidewall of the biological filter layer 16 in the sediment collection area 13, and the contaminants deposited in the sediment collection area 13 are discharged from the slag discharge port 15.
Under the centrifugal effect, the pollutants gathered near the inner wall of the biological filter layer 16 are adsorbed in the porous structure of the biological filter layer 16, and in addition, the microorganisms in the biological filter layer 16 have degradation effect, do not release toxic and harmful substances to the water body, and can greatly strengthen the purifying effect of the water body. The biological filter layer 16 is also provided with a filtering water outlet 7, the filtering water outlet 7 is positioned below the vortex water outlet 10, and the inner wall of the biological filter layer 16 at the opposite side of the backwash water inlet 21 extends out of the separation device. A filter water outlet valve 22 is also arranged at the filter water outlet 7.
The vortex deposition separation device further comprises a total water outlet pipeline 11, wherein the total water outlet pipeline 11 is respectively communicated with the vortex water outlet 10 and the filtering water outlet 7, so that sewage for removing pollutants and water after back flushing and filtering are discharged outwards through the total water outlet pipeline 11.
The vortex deposition separation device is a cylindrical cylinder with a height of 1.5 to 3 times, preferably 2 times or 2.5 times the diameter of the bottom surface thereof. The long cylindrical structure enables the guide cylinder with vortex separation to be arranged above the sediment collecting area, and the vortex separation and gravity sedimentation areas are arranged up and down, so that the purifying treatment capacity of the water body is increased, and the occupied area of the purifying system is greatly reduced.
The biological filter layer 16 comprises an inner layer and an outer layer, wherein the inner layer is a small-particle biological filter layer 19, and the outer layer is a large-particle biological filter layer 20. The small-particle biological filter layer 19 is formed by any one or two of quartz sand and microporous ceramic grains, and the large-particle biological filter layer 20 is formed by mixing any one or more of zeolite, volcanic rock and macroporous ceramic grains.
The bottom of the side wall of the magnetic reinforced flocculation device opposite to the water inlet 1 is also provided with a magnetic powder recovery port 25. The bottom parts of the magnetic strengthening flocculation device and the vortex deposition separation device are respectively provided with surfaces which are inclined downwards towards the slag discharging port 15 and the magnetic powder recovery port 25, so that the sludge can flow out under the action of gravity.
In addition, the purification system with back flushing coagulation cyclone filtration also comprises magnetic powder recycling equipment. The magnetic powder recycling equipment comprises a magnetic separator 17 and a recycling pipeline 18, wherein the magnetic powder recycling port 25 of the magnetic strengthening flocculation device and sludge discharged from the slag discharge port 15 of the vortex deposition separation device are used for separating magnetic powder through the magnetic separator 17. The magnetic powder outlet of the magnetic separator 17 is communicated with the magnetic powder inlet 2 through a recycling pipeline 18, and the separated magnetic powder is returned to the magnetic powder inlet 2 through the recycling pipeline 18 for recycling. The magnetic powder recycling device can be directly connected with the magnetic powder recycling port 25 and the slag discharging port 15, and sludge discharged from the magnetic powder recycling port 25 and the slag discharging port 15 can be conveyed to the magnetic powder recycling device for operation through the conveying device. The magnetic powder is recycled, so that the consumption of the magnetic powder is greatly reduced, and the method has good economic and environmental effects.
The invention also provides a purification method of the coagulation cyclone filtration with back flushing, which comprises a magnetic strengthening flocculation step, a cyclone strengthening filtration step and a back flushing step.
The magnetic strengthening flocculation step comprises the following steps: the flocculation reaction is carried out by the magnetic strengthening flocculation device, water is introduced into the flocculation device from the water inlet 1 of the flocculation main body, and sewage is sequentially mixed with added magnetic powder, inorganic flocculant and organic flocculant in the flocculation main body to carry out the flocculation reaction, so that particles which are difficult to precipitate in the water are mutually polymerized to form floccules. The mixing positions and stages of different medicaments and sewage are different. The magnetic powder can strengthen the reaction inside flocculation, and greatly improves the sedimentation rate of pollutants. The water body subjected to the magnetically enhanced flocculation process is tangentially guided to the vortex deposition separation device, so that the water body enters the separation device body along a mode tangential to the circumference of the vortex deposition separation device. The cyclone reinforced filtering step comprises the following steps: the sewage enters the cyclone filtering area defined by the biological filtering material layer 16 tangentially through the water outlet pipeline of the flocculation device, and forms vortex in the cyclone filtering area. A guide cylinder 6 is also arranged in the cyclone filtering area to strengthen the vortex rotation; due to the centrifugal separation, pollutants carried in the water body are separated, accumulated near the inner wall of the biological filter material layer 16, deposited in the sediment collecting area 13 under the action of gravity and discharged from the slag discharging port 15; the water body with the pollutants removed enters the guide cylinder 6 from the opening at the lower part of the guide cylinder 6 and is discharged through the vortex water outlet 10 of the guide cylinder 6. When the biological filler layer is blocked or after a certain time of operation, a back flushing step is performed to flush away dirt deposited in the biological filter layer 16, so that the adsorption and degradation efficiency is improved; the back flushing step comprises the following steps: clean water is introduced into the back flush water inlet area from the back flush water inlet 21, flows through the biological filter layer 16, washes away dirt in the biological filter layer 16, enters the cyclone filtering area, and then the dirt-carrying water is subjected to cyclone separation by the guide cylinder 6, so that pollutants such as sludge are settled in the sediment collecting area and discharged through the slag discharging port. And after back flushing, the clean water on the upper layer is discharged from the filtering water outlet 7.
The purification method may further include a magnetic powder recovery step in which the contaminants discharged from the magnetic powder recovery port 25 and the slag discharge port 15 are transferred to a magnetic powder recovery apparatus, and the magnetic separator 17 separates the magnetic powder from the contaminants and returns the separated magnetic powder to the magnetic powder addition port 2 for recycling.
The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the scope of the technical concept of the present invention, and all the simple modifications belong to the protection scope of the present invention.
In addition, the specific features described in the above embodiments may be combined in any suitable manner without contradiction. The various possible combinations of the invention are not described in detail in order to avoid unnecessary repetition.
Claims (10)
1. A purification system for coagulation cyclone filtration with backwash, characterized by: comprises a magnetic strengthening flocculation device and an eddy deposition separation device with a back flushing function;
the magnetic strengthening flocculation device comprises a water inlet (1), a flocculation main body and a medicament supply device, wherein the water inlet (1) is positioned on the side wall of the flocculation main body, the medicament supply device comprises 3 medicament adding ports arranged on the top of the flocculation main body, and the 3 medicament adding ports are a magnetic powder adding port (2), an inorganic coagulant adding port (3) and an organic flocculant adding port (4) respectively; the magnetic powder adding inlet (2), the inorganic coagulant adding inlet (3) and the organic flocculant adding inlet (4) are sequentially arranged on the flocculation main body according to the water flow direction; the water outlet pipeline is positioned on the side wall of the flocculation main body opposite to the water inlet (1); the magnetic powder adding port (2) stretches into the upper part of the flocculation main body, the inorganic coagulant adding port (3) stretches into the lower part of the flocculation main body, and a straight baffle plate (23) which extends downwards from the top of the flocculation main body is arranged between the magnetic powder adding port (2) and the inorganic coagulant adding port (3); an organic flocculant adding port (4) extends into the upper part of the flocculation main body; the magnetic strengthening flocculation device also comprises an L-shaped baffle plate (24), wherein the vertical section of the L-shaped baffle plate (24) is positioned between the inorganic coagulant adding port and the organic coagulant adding port;
the vortex deposition separation device with the back flushing function comprises a shell (5), a biological filter material layer (16), a vortex water outlet (10) and a slag discharge port (15); the biological filter material layers (16) are arranged in the shell (5) at intervals, the separation device main body is divided into two areas, a back flushing water inlet area is arranged in the area between the biological filter material layers (16) and the shell (5), and a cyclone filtering area is arranged in the biological filter material layers (16); the backwash water inlet (21) is arranged at the top of the backwash water inlet region; the water outlet pipeline of the flocculation device is inserted into the inner wall of the biological filter material layer (16) to be fixed in a tangential mode with the circumference of the biological filter material layer (16); a guide cylinder (6) is also arranged in the cyclone filtering area, water flow forms vortex between the biological filter material layer (16) and the outer cylinder of the guide cylinder (6), and a vortex water outlet (10) is arranged at the upper part of the guide cylinder (6); the bottom of the vortex deposition separation device is provided with a slag discharge port (15); the guide cylinder (6) further comprises an inner cylinder (8) and an outer cylinder (9), the guide cylinder outer cylinder (9) is in a round table shape with a small upper part and a large lower part, an included angle between a round table bus formed by the guide cylinder outer cylinder (9) and a high line of the guide cylinder bus is smaller than 10 degrees, and the guide cylinder inner cylinder (8) is cylindrical.
2. A purification system with backwash, coagulated cyclone filtration as claimed in claim 1,
the method is characterized in that: the bottom of the side wall of the magnetic strengthening flocculation device opposite to the water inlet (1) is also provided with a magnetic powder recovery port (25); the purifying system further comprises magnetic powder recycling equipment, the magnetic powder recycling equipment comprises a magnetic separator (17) and a recycling pipeline (18), a magnetic powder recycling port (25) of the magnetic strengthening flocculation device and a slag discharging port (15) of the vortex deposition separation device are communicated with the magnetic separator (17), and a magnetic powder outlet of the magnetic separator (17) is communicated with the magnetic powder adding port (2) through the recycling pipeline (18) for recycling; the magnetic powder recycling device is directly connected with the magnetic powder recycling port (25) and the slag discharging port (15), or the sludge discharged from the magnetic powder recycling port (25) and the slag discharging port (15) is conveyed to the magnetic powder recycling device for operation through the conveying device.
3. A purification system with backwash, coagulated cyclone filtration as claimed in claim 2,
the method is characterized in that: the included angle between the round table generatrix formed by the guide cylinder outer cylinder (9) and the high line is 3 degrees or 5 degrees.
4. A purification system with backwash, coagulated cyclone filtration as claimed in claim 3,
the method is characterized in that: a deflector (12) is arranged in the vortex deposition separation device, and the deflector (12) is positioned below the guide cylinder (6) so as to form a sediment collection area (13) below the deflector (12); the bottom of the guide plate (12) is provided with a downward surface, and the bottom of the guide plate is provided with a sludge collecting opening (14), and pollutants deposited on the inner wall of the shell (5) are guided to the sludge collecting opening (14) along the downward surface of the guide plate (12) and enter a sediment collecting area (13) through the sludge collecting opening (14).
5. A purification system with backwash, coagulated cyclone filtration as recited in claim 4,
the method is characterized in that: the medicament supply device further comprises an automatic feeding device; the addition amounts of the magnetic powder, the inorganic coagulant and the organic flocculant are automatically controlled according to the flow of water; and/or the adding proportion of the magnetic powder, the inorganic coagulant and the organic flocculant is automatically adjusted according to the water flow; the magnetic powder is magnetic powder comprising ferroferric oxide; the inorganic coagulant is one or a mixture of more of aluminum salt, ferric salt and calcium chloride; the organic flocculant is polyacrylamide and derivatives thereof.
6. A purification system with backwash, coagulated cyclone filtration as recited in claim 5,
the method is characterized in that: the vortex deposition separation device also comprises a total water outlet pipeline (11), wherein the total water outlet pipeline (11) is respectively communicated with the vortex water outlet (10) and the filtering water outlet (7), so that the sewage for removing pollutants and the water after back flushing and filtering are discharged outwards through the total water outlet pipeline (11); the bottoms of the magnetic strengthening flocculation device and the vortex deposition separation device are provided with surfaces which incline downwards towards the slag discharging port (15) and the magnetic powder recovery port (25) respectively; the vortex deposition separation device is a cylindrical barrel, and the height of the cylindrical barrel is 1.5-3 times of the diameter of the bottom surface of the cylindrical barrel.
7. A purification system with backwash, coagulated cyclone filtration as recited in claim 6,
the method is characterized in that: the biological filter material layer (16) comprises an inner layer and an outer layer, the inner layer is a small-particle biological filter material layer (19), and the outer layer is a large-particle biological filter material layer (20); the small-particle biological filter material layer (19) is formed by any one or two of quartz sand and microporous ceramic particles, and the large-particle biological filter material layer (20) is formed by mixing any one or more of zeolite, volcanic rock and macroporous ceramic particles; the biological filter material layer (16) is also provided with a filter water outlet (7), the filter water outlet (7) is positioned below the vortex water outlet (10), the inner wall of the biological filter material layer (16) at the opposite side of the backwash water inlet (21) extends out of the separation device, and the filter water outlet (7) is also provided with a filter water outlet valve (22).
8. A purification system with backwash, coagulated cyclone filtration as recited in claim 7,
the method is characterized in that: the water outlet pipeline of the flocculation device is obliquely downwards arranged on the shell (5) of the vortex deposition separation device; the included angle between the water outlet pipeline of the flocculation device and the horizontal plane is smaller than 30 degrees.
9. A purification method of coagulation cyclone filtration with back flush, which adopts the purification system of coagulation cyclone filtration with back flush of claim 8, comprising a magnetically enhanced flocculation step, a cyclone enhanced filtration step and a back flush step; the magnetic strengthening flocculation step comprises the following steps: introducing water into a flocculation device from a water inlet (1) of a flocculation main body, mixing sewage in the flocculation main body with added magnetic powder, inorganic flocculant and organic flocculant in sequence, and carrying out flocculation reaction, wherein the mixing positions and stages of different agents and sewage are different; the water body subjected to the magnetic strengthening flocculation process is tangentially guided to the vortex deposition separation device, so that the water body enters the separation device main body along a mode tangential to the circumference of the vortex deposition separation device;
the cyclone reinforced filtering step comprises the following steps: the sewage enters a cyclone filtering area defined by the biological filter material layer (16) tangentially, a vortex is formed in the cyclone filtering area, and a guide cylinder (6) is arranged in the cyclone filtering area to strengthen the vortex rotation; contaminants collected near the inner wall of the biological filter layer (16) are deposited to the sediment collecting area (13) under the action of gravity and discharged from the slag discharging port (15); the water body with the pollutants removed enters the guide cylinder (6) and is discharged from a vortex water outlet (10) of the guide cylinder (6);
when the bio-filler layer is blocked or after a certain time of operation, a back flushing step is performed to flush away contaminants deposited in the bio-filter layer (16), improving the adsorption degradation efficiency.
10. A method of purifying a coagulated cyclone filter having back flushing according to claim 9, wherein: the back flushing step comprises the following steps: introducing clean water into a back flushing water inlet area from a back flushing water inlet port (21), flushing away dirt in the biological filter material layer (16) by the water flowing through the biological filter material layer (16), allowing the dirt to enter a cyclone filter area, settling the dirt into a sediment collecting area, discharging the dirt through a slag discharging port, and discharging clean water at the upper layer after back flushing from a filter water outlet (7); and/or
The purification method can further comprise a magnetic powder recovery step, wherein pollutants discharged from a magnetic powder recovery port (25) arranged at the bottom of the magnetic strengthening flocculation device and a slag discharge port (15) of the vortex deposition separation device are conveyed to magnetic powder recovery equipment, and the magnetic separator (17) separates magnetic powder from the pollutants and returns the magnetic powder to the magnetic powder inlet (2) for recycling.
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