CN112830603B - Multi-medium sewage advanced treatment system - Google Patents
Multi-medium sewage advanced treatment system Download PDFInfo
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- CN112830603B CN112830603B CN202110078318.1A CN202110078318A CN112830603B CN 112830603 B CN112830603 B CN 112830603B CN 202110078318 A CN202110078318 A CN 202110078318A CN 112830603 B CN112830603 B CN 112830603B
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- 239000010865 sewage Substances 0.000 title claims abstract description 128
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 148
- 238000004062 sedimentation Methods 0.000 claims abstract description 97
- 239000010802 sludge Substances 0.000 claims abstract description 73
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 69
- 239000004576 sand Substances 0.000 claims abstract description 57
- 238000005189 flocculation Methods 0.000 claims abstract description 42
- 230000016615 flocculation Effects 0.000 claims abstract description 42
- 238000010992 reflux Methods 0.000 claims abstract description 37
- 239000007788 liquid Substances 0.000 claims abstract description 34
- 239000000701 coagulant Substances 0.000 claims abstract description 24
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 claims abstract description 13
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 10
- 238000005345 coagulation Methods 0.000 claims description 48
- 230000015271 coagulation Effects 0.000 claims description 48
- 238000002156 mixing Methods 0.000 claims description 35
- 238000006115 defluorination reaction Methods 0.000 claims description 34
- 239000003795 chemical substances by application Substances 0.000 claims description 33
- 239000003344 environmental pollutant Substances 0.000 claims description 27
- 231100000719 pollutant Toxicity 0.000 claims description 27
- 238000000926 separation method Methods 0.000 claims description 20
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical group [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 8
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 3
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 3
- 239000004571 lime Substances 0.000 claims description 3
- 239000008267 milk Substances 0.000 claims description 3
- 210000004080 milk Anatomy 0.000 claims description 3
- 235000013336 milk Nutrition 0.000 claims description 3
- 239000002351 wastewater Substances 0.000 claims description 3
- 230000001112 coagulating effect Effects 0.000 claims description 2
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 claims description 2
- 229910000360 iron(III) sulfate Inorganic materials 0.000 claims description 2
- 239000000395 magnesium oxide Substances 0.000 claims description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical group [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 2
- 239000003814 drug Substances 0.000 claims 2
- 238000001556 precipitation Methods 0.000 abstract description 25
- 229910052710 silicon Inorganic materials 0.000 abstract description 14
- 239000010703 silicon Substances 0.000 abstract description 14
- -1 flocculant Substances 0.000 abstract description 2
- 229910052799 carbon Inorganic materials 0.000 description 15
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 13
- 238000006243 chemical reaction Methods 0.000 description 11
- 230000009471 action Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 229910052731 fluorine Inorganic materials 0.000 description 7
- 239000011737 fluorine Substances 0.000 description 7
- 239000008394 flocculating agent Substances 0.000 description 6
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 238000001179 sorption measurement Methods 0.000 description 5
- 238000003756 stirring Methods 0.000 description 5
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 4
- 238000002306 biochemical method Methods 0.000 description 4
- 239000000356 contaminant Substances 0.000 description 4
- 239000012528 membrane Substances 0.000 description 4
- 229920002401 polyacrylamide Polymers 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 229910001385 heavy metal Inorganic materials 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000969 carrier Substances 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 125000001153 fluoro group Chemical group F* 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000012372 quality testing Methods 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 238000009303 advanced oxidation process reaction Methods 0.000 description 1
- 229940037003 alum Drugs 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 150000004763 sulfides Chemical class 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Classifications
-
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- 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
- C02F2303/06—Sludge reduction, e.g. by lysis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
- C02F5/02—Softening water by precipitation of the hardness
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The application relates to the technical field of sewage treatment, and particularly discloses a multi-medium sewage advanced treatment system. The device comprises an upstream sedimentation system I, a downstream sedimentation system II and a hydraulic cyclone device; the hydraulic cyclone separating device is connected with a sludge reflux pump, a cyclone separating liquid reflux pipe and a micro sand reflux pipe; the water inlet end of the sludge reflux pump is communicated with the downstream of the precipitation system II, and the water outlet end of the sludge reflux pump is communicated with the water inlet end of the hydraulic cyclone separating device; the water inlet end of the cyclone liquid return pipe is communicated with the water outlet end of the hydraulic cyclone device, and the water inlet end is connected with the upstream of the precipitation system I; the sand inlet end of the micro sand return pipe is communicated with the sand outlet end of the hydraulic cyclone separating device, and the sand outlet end is communicated with the precipitation system II. The sedimentation system I and the sedimentation system II are combined and used, and the related coagulant, flocculant, activated carbon, micro sand and other mediums are added into the sewage to remove silicon, hardness, fluoride, COD and the like in the sewage, and can overcome flocculation difficulty caused by low temperature and low turbidity.
Description
Technical Field
The application relates to the technical field of sewage treatment, in particular to a multi-medium sewage advanced treatment system.
Background
In order to prevent and treat water pollution, protect and improve water environment, ensure human health, promote sustainable development of environment, economy and society, china goes out of national sewage discharge standards and sewage discharge standards of various places, and along with the strengthening of people's environmental awareness, the sewage discharge standards are higher and higher, so that sewage is required to be subjected to advanced treatment.
In general, the sewage advanced treatment method includes an activated carbon adsorption method, a membrane separation method, a high-grade oxidation method, an ozone method, a biochemical method, and the like. The activated carbon adsorption method utilizes the characteristic adsorption capacity of the activated carbon, can effectively adsorb organic pollutants in wastewater, but has low utilization rate of the activated carbon in the activated carbon adsorption method. The membrane separation method is a novel separation technology for separating, purifying and concentrating the mixture by utilizing a membrane with selective permeability under the pushing of external force, and the membrane separation technology is generally suitable for separating the mixture with larger difference of physical properties. Advanced oxidation processes utilize extremely strong oxidants such as ozone to remove color, turbidity, odor and other contaminants such as phenols, cyanides, sulfides, pesticides and petroleum from wastewater. The combination of the ozone method and the biochemical method is a technology for degrading macromolecular refractory organic matters into micromolecular organic matters by using an advanced oxidation technology and removing the micromolecular organic matters by using the biochemical method, and the technology of combining the ozone method and the biochemical method is adopted for treating sewage, so that the treatment cost is high, and the occupied area of a biochemical treatment system is large.
Therefore, for those organic sewage which is low in temperature and low in turbidity and contains more pollutants and is difficult to degrade, there is a need to develop an advanced treatment system for treating the sewage so as to enable the sewage to reach the standard for discharge.
Disclosure of Invention
The application provides a multi-medium sewage advanced treatment system for discharging organic sewage which is low in temperature and turbidity and contains difficult degradation in water up to the standard.
The application provides a multi-medium sewage advanced treatment system, which adopts the following technical scheme:
A multi-medium sewage advanced treatment system comprises an upstream sedimentation system I, a downstream sedimentation system II and a hydraulic cyclone separation device; the hydraulic cyclone separation device is connected with a sludge reflux pump, a cyclone liquid return pipe and a micro sand return pipe;
The water inlet end of the sludge reflux pump is communicated with the downstream of the precipitation system II, and the water outlet end of the sludge reflux pump is communicated with the water inlet end of the hydraulic cyclone separating device; the water inlet end of the cyclone liquid return pipe is communicated with the water outlet end of the hydraulic cyclone device, and the water inlet end is connected to the upstream of the precipitation system I; the sand inlet end of the micro-sand return pipe is communicated with the sand outlet end of the hydraulic cyclone separating device, and the sand outlet end is communicated with the downstream of the precipitation system II.
By adopting the technical scheme, the precipitation system I and the precipitation system II are combined, and the silicon, hardness, fluoride, nondegradable COD, chromaticity, heavy metal, fine suspended matters and the like in the sewage are removed by adding related mediums such as the treating agent, the activated carbon, the micro sand and the like into the sewage. The sludge in the precipitation system II is sent into a hydraulic cyclone separating device for separation treatment, and the separated cyclone separating liquid flows back to the upstream of the precipitation system I, so that various agents put in the sewage can be reused, the cost is saved, and the sewage treatment efficiency can be improved; the separated micro sand flows back to the precipitation unit of the precipitation system II, so that the precipitation speed of pollutants in the precipitation unit is accelerated, the mud-water separation is facilitated, and in addition, the addition of the micro sand can increase the surface area of reaction contact, and the flocculation difficulty caused by low temperature and low turbidity is overcome.
Preferably, the precipitation system I comprises a mixing coagulation unit, a flocculation tank I and a precipitation tank I which are sequentially connected, and the water outlet end of the cyclone separating liquid return pipe is communicated with the mixing coagulation unit.
Through adopting above-mentioned technical scheme, precipitation system I adopts high-efficient precipitation system, and high-efficient precipitation system can remove hard, desilication, defluorination and remove heavy metal etc. be favorable to going out the difficult degradation organic matter in the sewage.
Preferably, the mixing coagulation unit comprises a mixing tank I and a coagulation tank I which are sequentially communicated, the water outlet end of the rotary liquid separating return pipe is communicated with the mixing tank I, and the coagulation tank I is connected with a coagulant adding device I.
Through adopting above-mentioned technical scheme, the whirl liquid that comes out from the water conservancy whirl divides in the device directly flows back to mixing tank I in, mixes with original sewage directly, contains various dosing agents and a small amount of micro sand etc. in the whirl liquid to be favorable to the pollutant intensive mixing and the reaction in agent and the sewage, be favorable to reducing the flocculation degree of difficulty of low temperature, low turbid sewage simultaneously. In the application, the cyclone separating liquid and the original sewage are uniformly mixed in the mixing tank I, then flow into the coagulation tank I, and the coagulant is added into the coagulation tank I through the coagulant adding device I, so that a technician can select the type of the coagulant and control the adding amount of the coagulant according to the sewage condition in the mixing tank I, thereby being beneficial to accurately and efficiently treating the sewage.
Preferably, the sedimentation system I further comprises a target pollutant removal unit I, which is connected upstream of the flocculation basin I.
By adopting the technical scheme, different raw sewage contains different pollutants, and the upstream of the precipitation system I is connected with the target pollutant removal unit I, so that the treatment of sewage containing specific pollutants, such as sewage with high fluorine content or silicon content, sewage with high hardness and the like, is facilitated. One sewage treatment system can be used for treating various sewage, and the sewage treatment system has wide application range and high treatment efficiency.
Preferably, the sedimentation system II comprises a target pollutant removal unit II, a coagulation tank II, a flocculation tank II and a sedimentation tank II which are connected in sequence;
The water inlet end of the sludge reflux pump is connected to the bottom of the sedimentation tank II, and the sand outlet end of the micro sand reflux pipe is connected to the flocculation tank II;
And the flocculation tank II is connected with a micro sand feeding device.
By adopting the technical scheme, the target pollutant removing unit II can deeply remove target pollutants in sewage, in addition, the sludge reflux pump reflux part of sludge in the sedimentation tank II to the hydraulic cyclone separating device, and the micro sand is refluxed to the flocculation tank II after being treated by the hydraulic cyclone separating device, so that flocculation is facilitated; the cyclone separating liquid flows back to the mixing pool I to be mixed with the original sewage, and the cyclone separating liquid in the application is mud-water mixed liquid. In addition, in the application, part of sludge from the sedimentation tank II is completely conveyed into the hydraulic cyclone device, a sludge discharge pump is not required to discharge the sludge, the cyclone liquid separated from the hydraulic cyclone device is not required to be additionally added with a sludge tank for storage or treatment, and the sludge of the whole system is finally discharged from the bottom of the sedimentation tank I.
Preferably, the target pollutant removing unit I comprises a silicon removing tank and a hard removing tank which are sequentially connected, wherein the water inlet end of the silicon removing tank is connected with the water outlet end of the coagulation tank I, and the water outlet end of the hard removing tank is communicated with the water inlet end of the flocculation tank I.
Preferably, the target pollutant removing unit II comprises an activated carbon treatment tank, wherein the water inlet end of the activated carbon treatment tank is connected with the water outlet end of the sedimentation tank I, and the water outlet end is communicated with the coagulation tank II.
Through adopting above-mentioned technical scheme, target pollutant removal unit I includes except that silicon pond and removes hard pond, that is to say, upstream adopts behind the improvement sedimentation system I (high-efficient sedimentation system) to carry out special processing to the sewage that the silicon content is higher or hardness exceeds standard, simultaneously, enables this sewage discharge up to standard. The downstream adopts various medium carriers such as active carbon, micro sand, coagulant, flocculant and the like to treat sewage, so that the solid-liquid separation speed of a separation area of a sedimentation tank II is greatly improved, the hydraulic load of the separation area can reach more than 30m 3/(m2 & h), and the COD which is difficult to degrade in the water can be effectively removed. In addition, the active carbon is refluxed into the mixing tank I through the hydraulic cyclone separating device, the active carbon which is not adsorbed and saturated is recycled, the utilization rate of the active carbon is improved, and the adding amount of the active carbon is reduced.
Preferably, the target pollutant removing unit I comprises a primary defluorination pond, the water inlet end of the primary defluorination pond is connected with a sewage water inlet unit, and the water outlet end of the primary defluorination pond is communicated with the water inlet end of the mixing pond I.
Preferably, the target pollutant removing unit II comprises a secondary defluorination pond, the water inlet end of the secondary defluorination pond is communicated with the sedimentation pond I, and the water outlet end of the secondary defluorination pond is communicated with the coagulation pond II.
By adopting the technical scheme, sewage with higher fluoride can be treated, the defluorination effect is better, and the sewage can be discharged up to the standard.
In summary, the application has the following beneficial effects:
1. The sedimentation system I and the sedimentation system II are combined, and the related coagulant, flocculant, activated carbon, micro sand and other mediums are added into the sewage to remove silicon, hardness, fluoride, nondegradable COD, chromaticity, heavy metal, fine suspended matters and the like in the sewage, so that flocculation difficulty caused by low temperature and low turbidity can be overcome;
2. Because of adopting various medium carriers such as active carbon, micro sand, coagulant, flocculant and the like, the solid-liquid separation speed of a separation area of a sedimentation tank II is greatly improved, and the hydraulic load of the separation area can reach more than 30m 3/(m2 & h);
3. The active carbon or the defluorinating agent and the like are returned into the mixing tank I through the hydraulic cyclone separating device, so that the utilization rate of the active carbon or the defluorinating agent is improved, and the addition amount of the active carbon or the defluorinating agent is reduced;
4. the cyclone separating liquid from the hydraulic cyclone separating device is completely returned to the mixing tank I to be mixed with the original sewage, the sludge concentration in the cyclone separating liquid reaches 30-50g/L by utilizing the sludge concentration function of the sedimentation tank I, the sludge tank is not required to be additionally increased for storage or treatment, the sludge tank of a conventional sand adding sedimentation tank is omitted, the sludge return quantity of the sedimentation tank I can be effectively reduced, and the energy consumption is reduced.
Drawings
Fig. 1 is a schematic structural view of the overall structure of the multi-medium sewage deep treatment system of the present application.
Fig. 2 is a schematic structural implementation of the overall structure of the multi-medium sewage deep treatment system of embodiment 1 of the present application.
Fig. 3 is a schematic structural implementation of the overall structure of the multi-medium sewage deep treatment system of embodiment 2 of the present application.
Reference numerals: 1. a precipitation system I; 11. a mixing and coagulating unit; 111. a mixing tank I; 112. a coagulation tank I; 1121. coagulant adding device I; 12. a target pollutant removal unit I; 121. a silicon removing pool; 1211. a silicon removing agent adding device; 122. removing a hard pool; 1221. a hard removing agent adding device; 13. flocculation tank I; 131. a guide cylinder I; 1311. an upward-lifting axial flow stirrer; 1312. adding a flocculating agent into the ring I; 14. a sedimentation tank I; 141. a mud scraper; 142. a sludge discharge pump; 143. a sludge reflux pump I; 144. inclined tube sedimentation area I; 145. a water outlet tank I; 146. a water outlet channel; 2. a precipitation system II; 21. a target pollutant removal unit II; 211. an active carbon treatment tank; 2111. an active carbon adding device; 22. a coagulation tank II; 221. coagulant adding device II; 23. flocculation tank II; 231. a guide cylinder II; 232. a micro sand adding device; 233. adding a flocculating agent into the ring II; 24. a sedimentation tank II; 241. inclined tube sedimentation zone II; 242. a water outlet tank II; 243. clear water is discharged from the ditch; 3. a hydraulic cyclone separating device; 31. a sludge reflux pump; 32. a cyclone liquid-separating return pipe; 33. a micro sand return pipe; 4. an original sewage inlet pipe; 5. a water passing channel; 6. a plug flow area; 7. a stirrer; 8. a first-stage defluorination pool; 81. a defluorinating agent adding device I; 82. a fluoride on-line detector; 9. a second-stage defluorination tank; 91. and a defluorinating agent adding device II.
Detailed Description
The application is described in further detail below with reference to figures 1-3 and examples.
Example 1
As shown in fig. 1 and 2, a multi-medium sewage advanced treatment system comprises an upstream sedimentation system I1, a downstream sedimentation system II 2 and a hydraulic cyclone device 3;
The sedimentation system I1 comprises a mixing coagulation unit 11, a target pollutant removal unit I12, a flocculation tank I13 and a sedimentation tank I14; the mixing coagulation unit 11 comprises a mixing tank I111 and a coagulation tank I112; the target contaminant removal unit i 12 includes a desilication tank 121 and a hardness removal tank 122;
The sedimentation system II 2 comprises a target pollutant removal unit II 21, a coagulation tank II 22, a flocculation tank II 23 and a sedimentation tank II 24 which are connected in sequence; the target pollutant removal unit ii 21 includes an activated carbon treatment tank 211;
The hydraulic cyclone separating device 3 is connected with a sludge reflux pump 31, a cyclone separating liquid reflux pipe 32 and a micro sand reflux pipe 33.
As shown in fig. 2, along the water inflow direction of the sewage, a mixing tank I111, a coagulation tank I112, a desilication tank 121, a hardness removal tank 122, a flocculation tank I13, a sedimentation tank I14, an activated carbon treatment tank 211, a coagulation tank II 22, a flocculation tank II 23 and a sedimentation tank II 24 are sequentially communicated; the water inlet end of the sludge reflux pump 31 is communicated with the sedimentation tank II 24, and the water outlet end of the sludge reflux pump 31 is communicated with the water inlet end of the hydraulic cyclone device 3; the water inlet end of the cyclone liquid return pipe 32 is communicated with the water outlet end of the hydraulic cyclone device 3, and the water inlet end of the cyclone liquid return pipe 32 is communicated with the mixing tank I111; the sand inlet end of the micro sand return pipe 33 is communicated with the sand outlet end of the hydraulic cyclone device 3, and the sand outlet end of the micro sand return pipe 33 is communicated with the flocculation tank II 23.
As shown in fig. 2, the mixing tank i 111 is connected with an original sewage inlet pipe 4, the original sewage enters the mixing tank i 111, and the separated cyclone liquid is conveyed into the mixing tank i 111 through a hydraulic cyclone device 3 and a cyclone liquid return pipe 32; the mixer 7 is arranged in the mixing tank I111, so that the raw sewage and the cyclone separating liquid are fully mixed, the cyclone separating liquid contains activated carbon, and COD in the sewage can be adsorbed by utilizing the adsorption characteristic of the activated carbon.
As shown in FIG. 2, a coagulant adding device I1121 is connected to the coagulation tank I112, mixed sewage enters the coagulation tank I112, and coagulant can be added to the sewage in the coagulation tank I112 through the coagulant adding device I1121; the mixer 7 is arranged in the coagulation tank I112, and under the action of the mixer 7, sewage and coagulant are rapidly mixed, so that colloid in the sewage is rapidly destabilized to form fine alum blossom.
As shown in fig. 2, a desilicator adding device 1211 is connected to the desilicator tank 121, and desilicator can be added into the desilicator tank 121 through the desilicator adding device 1211; the silicon removing tank 121 is internally provided with a stirrer 7, sewage is rapidly mixed with a silicon removing agent under the action of the stirrer 7, and silicon in the sewage rapidly reacts with the silicon removing agent to generate complex silicate precipitation.
As shown in fig. 2, a hard removing agent adding device 1221 is connected to the hard removing tank 122, and a hard removing agent (sodium carbonate) can be added to the hard removing tank 122 by the hard removing agent adding device 1221; the mixer 7 is installed in the hardness removal tank 122, and sewage and a hardness removal agent (sodium carbonate) are rapidly mixed under the action of the mixer 7 to generate magnesium hydroxide sediment and/or calcium carbonate sediment, so that the hardness of the sewage can be reduced.
As shown in FIG. 2, a guide cylinder I131 is installed in the flocculation tank I13, a water passing channel 5 is connected between the hardness removal tank 122 and the flocculation tank I13, the water inlet end of the water passing channel 5 is communicated with the bottom of the hardness removal tank 122, the water outlet end of the water passing channel 5 is communicated with the bottom of the guide cylinder I131, sewage in the hardness removal tank 122 can be conveyed to the bottom of the guide cylinder I131 by utilizing the water passing channel 5, and sewage in the guide cylinder I131 enters and exits under water, so that the formation of flocs is facilitated. The lifting type axial flow stirrer 1311 is arranged in the guide cylinder I131, the lifting type axial flow stirrer 1311 comprises a variable frequency motor, a stirring shaft fixedly connected with an output shaft of the variable frequency motor is vertically arranged in the guide cylinder I131, and stirring blades are connected to the bottom of the stirring shaft. The guide cylinder I131 is positioned above the stirring blades, and a flocculating agent feeding ring I1312 is connected with the inner wall surrounding the guide cylinder I131. The guide cylinder I131 is matched with the lifting axial flow stirrer 1311 arranged in the guide cylinder I131 to form an internal circulation flow state, so that the growth and uniformity of the flocs are facilitated, a certain flow rate is maintained in the flocculation tank I13 by utilizing a hydraulic condition, and the formed flocs are not broken.
As shown in FIG. 2, as shown in the drawing, a flocculation tank I13 and a sedimentation tank I14 are separated by a retaining wall, the top of the retaining wall is provided with a notch, a mounting frame I is mounted on the flocculation tank I13, one side, close to the retaining wall, of the mounting frame I is fixedly provided with a water diversion plate, the top of the water diversion plate prevents water flow from passing through, a gap for sewage to flow through is formed in the bottom of the water diversion plate, a plug flow area 6 is formed between the water diversion plate and the retaining wall, sewage in the flocculation tank I13 flows out from the bottom of the flocculation tank I13, and enters the sedimentation tank I14 from the top of the sedimentation tank I14 through the plug flow area 6.
As shown in fig. 2, a sludge scraper 141 is installed in the sedimentation tank i 14, a sludge discharge pump 142 is connected to the bottom of the sedimentation tank i 14, an input end of the sludge discharge pump 142 is communicated with the sedimentation tank i 14, and an output end of the sludge discharge pump 142 is connected with a sludge treatment unit. Sludge at the bottom of the sedimentation tank I14 is scraped to a sludge discharge port by the sludge scraper 141, so that the sludge is discharged into a sludge treatment unit by the sludge discharge pump 142, and the sludge is subjected to centralized treatment. The bottom of the sedimentation tank I14 is connected with a sludge reflux pump I143, the water inlet end of the sludge reflux pump I143 is communicated with the bottom of the sedimentation tank I14, the water outlet end of the sludge reflux pump I143 is communicated with the water passage 5, and part of sludge is refluxed to the flocculation tank I13, so that the flocculation difficulty of low-turbidity and low-temperature sewage is reduced.
As shown in FIG. 2, a plurality of inclined pipes are arranged at the upper part of the tank body in the sedimentation tank I14 to form an inclined pipe sedimentation zone I144, a water outlet tank I145 is arranged above the inclined pipe sedimentation zone I144, the water outlet tank I145 is arranged on the tank wall of the sedimentation tank I14, and a water outlet channel 146 is connected with the top of the sedimentation tank I14 and surrounds the peripheral wall of the sedimentation tank I14. The sewage in the sedimentation tank I14 passes through the inclined tube sedimentation zone I144, enters the water outlet tank I145, and overflows from the water outlet tank I145 to the water outlet channel 146.
As shown in FIG. 2, the water inlet end of the activated carbon treatment tank 211 is communicated with the water outlet channel 146, and the sewage treated by the precipitation system I1 enters the precipitation system II 2 for advanced treatment.
As shown in fig. 2, an activated carbon adding device 2111 is connected to the activated carbon treatment tank 211, and activated carbon can be added to the activated carbon treatment tank 211 by the activated carbon adding device 2111; the activated carbon treatment tank 211 is internally provided with a stirrer 7, sewage and activated carbon are rapidly mixed under the action of the stirrer 7, and the activated carbon can adsorb COD in water and the like.
As shown in fig. 2, a coagulant adding device II 221 is connected to the coagulation tank II 22, sewage enters the coagulation tank II 22, and coagulant can be added into the coagulation tank II 22 through the coagulant adding device II 221; the mixer 7 is arranged in the coagulation tank II 22, and sewage and coagulant are rapidly mixed under the action of the mixer 7, so that the formation of flocs is facilitated.
As shown in fig. 2, a guide cylinder II 231 and two baffles are arranged in the flocculation tank II 23, the guide cylinder II 231 is positioned between the two baffles, a mounting frame II is arranged on the flocculation tank II 23, the top end of the baffle is connected with the mounting frame II, the bottom end of the baffle is suspended, and the baffle close to the coagulation tank II 22 can prevent sewage from the top of the coagulation tank II 22 from entering from the top of the guide cylinder II 231; the baffle close to the sedimentation tank II 24 can prevent the sewage from the top of the guide cylinder II 231 from completely entering the sedimentation tank II 24, so that the sewage from the coagulation tank II 22 can enter from the bottom of the guide cylinder II 231, and the sewage in the guide cylinder II 231 enters and exits from the bottom of the guide cylinder II, so that internal circulation is formed, and the formation of flocs is facilitated. An upward-lifting type axial flow stirrer II is arranged in the guide cylinder II 231. The guide cylinder II 231 is positioned above the stirring blades of the lifting type axial flow stirrer II, and a flocculating agent adding ring II 233 is connected to the inner wall surrounding the guide cylinder II 231. The guide cylinder II 231 is matched with the lifting type axial flow stirrer II arranged in the guide cylinder II 231, so that the growth and uniformity of flocs are facilitated.
As shown in fig. 2, the flocculation tank ii 23 is connected with a micro sand adding device 232, and micro sand can be added into the flocculation tank ii 23 through the micro sand adding device 232 or the micro sand return pipe 33. The generated precipitate and the floccule formed by the activated carbon are slowly gathered under the action of the flocculating agent and the micro sand, and the floccule formed by the activated carbon is slowly enlarged and compacted by matching with the internal circulation of the guide cylinder II 231.
As shown in FIG. 2, a plurality of inclined pipes are arranged at the upper part of the tank body in the sedimentation tank II 24 to form an inclined pipe sedimentation zone II 241, a water outlet tank II 242 is arranged above the inclined pipe sedimentation zone II 241, the water outlet tank II 242 is arranged on the tank wall of the sedimentation tank II 24, and a clear water outlet channel 243 is connected with the peripheral wall of the sedimentation tank II 24 at the top of the sedimentation tank II 24. The sewage in the sedimentation tank II 24 passes through the inclined tube sedimentation zone II 241, enters the water outlet tank II 242, overflows into the clean water outlet channel 243 from the water outlet tank II 242, and the clean water in the clean water outlet channel 243 is discharged.
Application example 1
The multi-medium sewage advanced treatment system of example 1 was used to treat sewage of a certain project, and the total water amount of the RO system of a certain project was 100m 3/h.
Raw sewage enters a mixing tank I111 through a raw sewage inlet pipe 4, is mixed with the cyclone liquid from a cyclone liquid return pipe 32, then the mixed sewage enters a coagulation tank I112, and 50mg/LFeCl 3 of the sewage in the coagulation tank I112 can be added through a coagulant adding device I1121 for reaction for 3min;
Then the sewage enters a desilication tank 121, and 450mg/L magnesium oxide can be added into the desilication tank 121 through a desilication agent adding device 1211 for reaction for 6min; then the sewage enters the hardness removal tank 122, 850mg/L sodium carbonate can be added into the hardness removal tank 122 through a hardness removal agent adding device 1221, and the reaction is carried out for 12min; then sewage is mixed with the sludge reflowing in the sedimentation tank I14 through the water channel 5, then enters the guide cylinder I131 from the bottom of the guide cylinder I131, and is added with 1mg/L polyacrylamide through the flocculant adding ring I1312, and reacts for 12min; then sewage enters the sedimentation tank I14 from the top of the sedimentation tank I14 through the plug flow area 6, mud-water separation of the sedimentation tank I14 is carried out, sludge is accumulated at the bottom of the sedimentation tank I14, part of sludge flows back to the water channel 5 through the sludge return pump I143, the return flow of the sludge return pump I143 is 3% of the water inflow, the residual sludge is discharged into the sludge treatment unit through the sludge discharge pump 142, the separated sewage enters the water outlet tank I145 through the inclined tube sedimentation area I144, and then overflows into the water outlet channel 146 from the water outlet tank I145.
Then, the sewage from the water outlet channel 146 enters an active carbon treatment tank 211, 200mg/L active carbon can be added into the active carbon treatment tank 211 through an active carbon adding device 2111, and the reaction is carried out for 15min; then, the sewage enters a coagulation tank II 22, and 30mg/L FeCl 3 can be added into the sewage in the coagulation tank II 22 through a coagulant adding device II 221 for 3min; then the sewage enters from the bottom of a guide cylinder II 231 in the flocculation tank II 23 in the sewage machine to form an internal circulation flow state, micro sand (the micro sand input amount is 5g/L for the first time and 3mg/L for the later time and the micro sand continuously is added) can be input into the flocculation tank II 23 through a micro sand input device 232 or a micro sand return pipe 33, and 1mg/L polyacrylamide is input into the guide cylinder II 231 through a flocculant input ring II 233 for reaction for 12min; then enters a sedimentation tank II 24, mud and water are separated, sludge is precipitated at the bottom of the sedimentation tank II 24, the sludge is conveyed to a hydraulic cyclone separation device 3 through a sludge reflux pump 31 II, the reflux amount of the sludge reflux pump 31 is 6% of the water inflow, separated clean water passes through an inclined tube sedimentation zone II 241, enters a water outlet tank II 242, overflows into a clean water outlet channel 243 from the water outlet tank II 242, and clean water in the clean water outlet channel 243 is discharged.
The water quality in the raw sewage inlet pipe 4 and the clean water outlet channel 243 was measured, and the specific measurement results are shown in table 1 below.
Table 1 water quality testing table
Example 2
As shown in fig. 1 and 3, a multi-medium sewage deep treatment system, example 2 differs from example 1 only in that in example 2, the target contaminant removal unit i 12 includes a primary fluorine removal tank 8; the target pollutant removal unit II 21 comprises a secondary defluorination tank 9; along the water inlet direction of sewage, the first-stage defluorination tank 8, the mixing tank I111, the coagulation tank I112, the flocculation tank I13, the sedimentation tank I14, the second-stage defluorination tank 9, the coagulation tank II 22, the flocculation tank II 23 and the sedimentation tank II 24 are sequentially communicated; the water inlet end of the sludge reflux pump 31 is communicated with the sedimentation tank II 24, and the water outlet end of the sludge reflux pump 31 is communicated with the water inlet end of the hydraulic cyclone device 3; the water inlet end of the cyclone liquid return pipe 32 is communicated with the water outlet end of the hydraulic cyclone device 3, and the water inlet end of the cyclone liquid return pipe 32 is communicated with the mixing tank I111; the sand inlet end of the micro sand return pipe 33 is communicated with the sand outlet end of the hydraulic cyclone device 3, and the sand outlet end of the micro sand return pipe 33 is communicated with the sedimentation tank II 24.
As shown in fig. 3, a defluorinating agent adding device I81 is connected to the first-stage defluorinating tank 8, and defluorinating agent (lime milk) can be added into the first-stage defluorinating tank 8 through the defluorinating agent adding device I81; the mixer 7 is arranged in the defluorination tank, under the action of the mixer 7, the sewage is rapidly mixed with the defluorination agent, and the fluoride in the sewage is rapidly reacted with the defluorination agent, so that the fluoride in the sewage can be removed. The fluoride on-line detector 82 is installed in the first-stage defluorination tank 8, and can detect the fluoride content in the first-stage defluorination tank 8.
As shown in fig. 3, a fluorine removal agent adding device II 91 is connected to the secondary fluorine removal tank 9, and fluorine removal agent can be added into the secondary fluorine removal tank through the fluorine removal agent adding device II 91; the mixer 7 is arranged in the defluorination tank, under the action of the mixer 7, the sewage is rapidly mixed with the defluorination agent, and the fluoride in the sewage is rapidly reacted with the defluorination agent, so that the fluoride in the sewage can be removed.
Application example 2
The gasified water system of a certain project in Henan was treated by the multi-medium sewage advanced treatment system of example 2, and the total water amount of the project was 180m 3/h.
Raw sewage enters a primary defluorination tank 8 through a raw sewage water inlet pipe 4, 250mg/L lime milk is added into the primary defluorination tank 8 through a defluorination agent adding device I81, and the raw sewage reacts for 10min; then the sewage enters a mixing tank I111 to be mixed with the cyclone liquid from the cyclone liquid return pipe 32, the mixed sewage then enters a coagulation tank I112, and 100mg/L polyaluminum chloride can be added into the sewage in the coagulation tank I112 through a coagulant adding device I1121 to react for 3min; then sewage is mixed with the sludge reflowing in the sedimentation tank I14 through the water channel 5, then enters the guide cylinder I131 from the bottom of the guide cylinder I131, and is added with 1mg/L polyacrylamide through the flocculant adding ring I1312 for reaction for 12min. Then sewage enters the sedimentation tank I14 from the top of the sedimentation tank I14 through the plug flow area 6, mud-water separation of the sedimentation tank I14 is carried out, sludge is accumulated at the bottom of the sedimentation tank I14, part of sludge flows back to the water channel 5 through the sludge return pump I143, the return flow of the sludge return pump I143 is 5% of the inflow, the residual sludge is discharged into the sludge treatment unit through the sludge discharge pump 142, the separated sewage enters the water outlet tank I145 through the inclined tube sedimentation area I144, and then overflows into the water outlet channel 146 from the water outlet tank I145.
Then, the sewage from the water outlet channel 146 enters a secondary defluorination tank 9, and 2200mg/L of polyaluminum ferric sulfate is added into the secondary defluorination tank 9 through a defluorination agent adding device II 91 for reaction for 6min; then the sewage enters a coagulation tank II 22, 100mg/L polyaluminium chloride can be added into the sewage in the coagulation tank II 22 through a coagulant adding device II 221, and the reaction is carried out for 3min; then the sewage enters from the bottom of a guide cylinder II 231 in the flocculation tank II 23 in the sewage machine to form an internal circulation flow state, micro sand (the micro sand input amount is 3g/L for the first time and the micro sand input amount is 3mg/L for the later time and the micro sand continuously is supplemented) can be input into the flocculation tank II 23 through a micro sand input device 232 or a micro sand return pipe 33, and 1mg/L polyacrylamide is input into the guide cylinder II 231 through a flocculating agent input ring II 233 for reaction for 12min; then enters a sedimentation tank II 24, mud and water are separated, sludge is precipitated at the bottom of the sedimentation tank II 24, the sludge is conveyed to a hydraulic cyclone separation device 3 through a sludge reflux pump 31 II, the reflux amount of the sludge reflux pump 31 II is 6% of the inflow water flow, separated clean water passes through an inclined tube sedimentation zone II 241, enters a water outlet tank II 242, overflows into a clean water outlet channel 243 from the water outlet tank II 242, and clean water in the clean water outlet channel 243 is discharged.
The water quality in the raw sewage inlet pipe 4 and the clean water outlet channel 243 was measured, and the specific measurement results are shown in table 2 below.
Table 2 water quality testing table
| Contaminant project | Sewage inlet pipe water quality | Water quality of clear water outlet channel |
| SS/mg/L | 100 | ≤10 |
| Fluoride/mg/L | 90-120 | ≤2 |
The present embodiment is only for explanation of the present application and is not to be construed as limiting the present application, and modifications to the present embodiment, which may not creatively contribute to the present application as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present application.
Claims (2)
1. The multi-medium sewage advanced treatment system is characterized by comprising an upstream sedimentation system I (1), a downstream sedimentation system II (2) and a hydraulic cyclone separation device (3);
The sedimentation system I (1) comprises a mixing coagulation unit (11), a target pollutant removal unit I (12), a flocculation tank I (13) and a sedimentation tank I (14) which are connected in sequence; the bottom of the sedimentation tank I (14) is connected with a sludge reflux pump I (143), the water inlet end of the sludge reflux pump I (143) is communicated with the bottom of the sedimentation tank I (14), and the water outlet end of the sludge reflux pump I (143) is communicated with the water passing channel (5);
the sedimentation system II (2) comprises a target pollutant removal unit II (21), a coagulation tank II (22), a flocculation tank II (23) and a sedimentation tank II (24) which are connected in sequence;
The hydraulic cyclone separating device (3) is connected with a sludge reflux pump (31), a cyclone separating liquid reflux pipe (32) and a micro sand reflux pipe (33); the water inlet end of the sludge reflux pump (31) is connected to the bottom of the sedimentation tank II (24), and the water outlet end is communicated with the water inlet end of the hydraulic cyclone separation device (3); the water inlet end of the cyclone liquid return pipe (32) is communicated with the water outlet end of the hydraulic cyclone device (3), and the water outlet end is communicated with the mixing and coagulating unit (11); the sand inlet end of the micro sand return pipe (33) is communicated with the sand outlet end of the hydraulic cyclone separating device (3), and the sand outlet end is connected to the flocculation tank II (23);
The target pollutant removing unit I (12) comprises a desilication tank (121) and a hardness removing tank (122) which are sequentially connected, wherein the water inlet end of the desilication tank (121) is connected with the water outlet end of the coagulation tank I (112), the water outlet end of the hardness removing tank (122) is communicated with the water inlet end of the flocculation tank I (13), the medicament put in the desilication tank is magnesium oxide, and the medicament put in the hardness removing tank is sodium carbonate; the target pollutant removing unit II (21) comprises an activated carbon treatment tank (211), wherein the water inlet end of the activated carbon treatment tank (211) is connected with the water outlet end of the sedimentation tank I (14), and the water outlet end is connected with the coagulation tank II (22);
When fluoride in the sewage is removed, the target pollutant removing unit I (12) further comprises a first-stage defluorination pool (8), the water inlet end of the first-stage defluorination pool (8) is connected with a sewage water inlet unit, and the water outlet end of the first-stage defluorination pool (8) is communicated with the water inlet end of the mixing pool I (111); the target pollutant removing unit II (21) comprises a secondary defluorination tank (9), the water inlet end of the secondary defluorination tank (9) is communicated with the sedimentation tank I (14), and the water outlet end is communicated with the coagulation tank II (22); the agent put in the first-stage defluorination pool (8) is lime milk, and the agent put in the second-stage defluorination pool (9) is polyaluminium ferric sulfate.
2. The multi-media wastewater deep treatment system of claim 1, wherein: the mixing coagulation unit (11) comprises a mixing tank I (111) and a coagulation tank I (112) which are sequentially communicated, the water outlet end of the rotary liquid separating return pipe (32) is communicated with the mixing tank I (111), and the coagulation tank I (112) is connected with a coagulant adding device I (1121).
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