CN113929259B - A sewage treatment system for simultaneous removal of COD, SS and TP - Google Patents
A sewage treatment system for simultaneous removal of COD, SS and TP Download PDFInfo
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- CN113929259B CN113929259B CN202111409180.5A CN202111409180A CN113929259B CN 113929259 B CN113929259 B CN 113929259B CN 202111409180 A CN202111409180 A CN 202111409180A CN 113929259 B CN113929259 B CN 113929259B
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- 239000010865 sewage Substances 0.000 title claims abstract description 26
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 104
- 238000006243 chemical reaction Methods 0.000 claims abstract description 98
- 239000006247 magnetic powder Substances 0.000 claims abstract description 55
- 238000011068 loading method Methods 0.000 claims abstract description 46
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 42
- 238000004062 sedimentation Methods 0.000 claims abstract description 38
- 238000005189 flocculation Methods 0.000 claims abstract description 37
- 230000016615 flocculation Effects 0.000 claims abstract description 37
- 238000005345 coagulation Methods 0.000 claims abstract description 35
- 230000015271 coagulation Effects 0.000 claims abstract description 35
- 239000010802 sludge Substances 0.000 claims description 61
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 28
- 239000000701 coagulant Substances 0.000 claims description 12
- 239000006148 magnetic separator Substances 0.000 claims description 11
- 238000003756 stirring Methods 0.000 claims description 10
- 238000004064 recycling Methods 0.000 claims description 9
- 238000011084 recovery Methods 0.000 claims description 3
- 239000003610 charcoal Substances 0.000 claims 5
- 239000000843 powder Substances 0.000 claims 5
- 230000008719 thickening Effects 0.000 claims 1
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 4
- 230000001360 synchronised effect Effects 0.000 abstract description 2
- 239000002245 particle Substances 0.000 description 19
- 238000010992 reflux Methods 0.000 description 10
- 238000001179 sorption measurement Methods 0.000 description 8
- 238000002156 mixing Methods 0.000 description 6
- 229910019142 PO4 Inorganic materials 0.000 description 5
- 230000005484 gravity Effects 0.000 description 5
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 5
- 239000010452 phosphate Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000010419 fine particle Substances 0.000 description 4
- 238000010008 shearing Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000013049 sediment Substances 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000008394 flocculating agent Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 230000001502 supplementing effect Effects 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
- C02F1/008—Control or steering systems not provided for elsewhere in subclass C02F
-
- 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
- C02F1/48—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
- C02F1/5281—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
- C02F1/56—Macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
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
本发明公开了一种实现同步去除COD、SS和TP的污水处理系统，包括：炭粉反应池，炭粉反应池的内侧安装有潜水搅拌机；加载反应池，加载反应池与炭粉反应池连通，炭粉反应池的上方安装有加载搅拌机；絮凝反应池，絮凝反应池与加载反应池连通，絮凝反应池的上方安装有絮凝搅拌机；磁混凝沉淀池，磁混凝沉淀池与絮凝反应池连通，磁混凝沉淀池的上方安装有刮泥机，磁混凝沉淀池的上方和絮凝反应池的上方均固定有SV在线检测仪；含磁粉的炭泥回流系统，含磁粉的炭泥回流系统连接在磁混凝沉淀池与加载反应池之间。该发明节省了炭粉的投加量和电机能耗，减轻了维护的劳动强度，还实现了更稳定运行。
The invention discloses a sewage treatment system for realizing synchronous removal of COD, SS and TP, including: a carbon powder reaction tank, a submersible mixer is installed inside the carbon powder reaction tank; a loading reaction tank, the loading reaction tank is connected with the carbon powder reaction tank, and a loading mixer is installed above the carbon powder reaction tank; a flocculation reaction tank, the flocculation reaction tank is connected with the loading reaction tank, and a flocculation mixer is installed above the flocculation reaction tank; a magnetic coagulation sedimentation tank, the magnetic coagulation sedimentation tank is connected with the flocculation reaction tank, a mud scraper is installed above the magnetic coagulation sedimentation tank, and an SV online detector is fixed above the magnetic coagulation sedimentation tank and the flocculation reaction tank; a carbon mud return system containing magnetic powder, the carbon mud return system containing magnetic powder is connected between the magnetic coagulation sedimentation tank and the loading reaction tank. The invention saves the amount of carbon powder added and the energy consumption of the motor, reduces the labor intensity of maintenance, and also realizes more stable operation.
Description
Technical Field
The invention relates to the field of sewage treatment, in particular to a sewage treatment system for synchronously removing COD, SS and TP.
Background
In the field of industrial sewage treatment, a process flow of primary pretreatment, secondary biochemical treatment and tertiary advanced treatment is generally adopted. Wherein, the primary pretreatment mainly removes suspended matters and adjusts the water quality and the water quantity, and the secondary biological treatment mainly realizes the removal of biochemical COD, ammonia nitrogen and total nitrogen; the three-stage advanced treatment mainly realizes the ultra-clean emission of COD, SS and TP which are difficult to biochemically treat. In the field of three-stage advanced treatment of industrial sewage, in order to realize synchronous removal of COD, SS and TP difficult to biochemically treat, a sewage advanced treatment technology of carbon powder adsorption and magnetic coagulation sedimentation technology is widely adopted, and effluent can reach the water body emission standard of I V types. The sewage treatment technology comprises the following technical processes: firstly adding powdered carbon into a powdered carbon reaction tank, and adsorbing difficult biochemical COD in sewage into micropores of the powdered carbon; then the wastewater enters a coagulation reaction tank, a coagulant (polyaluminium or polyiron and the like) is added to destabilize and separate out colloid substances in the wastewater to form small flocs, and the coagulant can react with phosphate to generate phosphate small flocs to separate out from the water body; then the magnetic powder enters a loading reaction tank, and the magnetic powder in the loading reaction tank can collide and adhere with various particles and separated small flocs, so that the purpose of loading the particles and the small flocs on the surface of the magnetic powder is realized; then the mixture enters a flocculation reaction tank, and the magnetic powder of the loaded particles and the small flocs is coagulated into magnetic flocs with larger particle size by adding flocculating agent (such as PAM); the magnetic floccule has large specific gravity and larger particle size, so that the magnetic floccule can be easily subjected to high-speed precipitation separation in a magnetic coagulation sedimentation tank.
Although the above process achieves the purpose of small occupied area and simultaneously can efficiently remove the difficult biochemical COD, SS and TP, the following problems need to be further optimally solved:
(1) The adsorption efficiency of the carbon powder to COD is low, the unit consumption of the carbon powder is high, and the operation cost is high.
(2) The power consumption of the stirrer of the carbon powder reaction tank (the common hydraulic retention time is 15-60 min) is higher.
(3) The fluid channels of the abrasion-resistant residual sludge pump and the abrasion-resistant return sludge pump adopting the centrifugal pump principle are narrower, the pump is easy to be blocked frequently due to sundries, and the maintenance strength is high.
(4) The ultrasonic sludge interface instrument is adopted for discharging the surplus sludge, and the failure rate is high and the accuracy is insufficient, so that the system is unstable in operation and the effluent quality is unstable.
Disclosure of Invention
In view of the above-mentioned drawbacks or shortcomings in the prior art, it is desirable to provide a sewage treatment system for synchronously removing COD, SS and TP, which saves the amount of carbon powder added and the energy consumption of the motor, reduces the labor intensity of maintenance, and also realizes more stable operation.
According to the technical scheme provided by the embodiment of the invention, the sewage treatment system for synchronously removing COD, SS and TP comprises: the inner side of the carbon powder reaction tank is provided with a submersible mixer; the left side of the carbon powder reaction tank is connected with a water inlet pipe, and a new carbon powder feeding pipe and a coagulant feeding pipe are connected above the carbon powder reaction tank; the loading reaction tank is communicated with the carbon powder reaction tank, and a loading stirrer is arranged above the loading reaction tank; a new magnetic powder feeding pipe is connected above the loading reaction tank, and a stirring shaft a of the loading stirrer stretches into the inner side of the loading reaction tank; the flocculation reaction tank is communicated with the loading reaction tank, and a flocculation stirrer is arranged above the flocculation reaction tank; a PAM feeding pipe is connected above the flocculation reaction tank, and a stirring shaft b of the flocculation stirrer stretches into the inner side of the flocculation reaction tank; the magnetic coagulation sedimentation tank is communicated with the flocculation reaction tank, a mud scraper is arranged above the magnetic coagulation sedimentation tank, and SV on-line detectors are fixed above the magnetic coagulation sedimentation tank and above the flocculation reaction tank; the right side of the magnetic coagulation sedimentation tank is connected with a water outlet pipe, and a scraper is connected below the mud scraper; the magnetic powder-containing carbon mud reflux system is connected between the magnetic coagulation sedimentation tank and the loading reaction tank; the carbon mud reflux system containing the magnetic powder comprises a reflux pipeline and an anti-blocking wear-resistant reflux sludge pump; the magnetic powder-containing carbon sludge discharge system is connected between the magnetic coagulation sedimentation tank and the sludge concentration tank; the carbon sludge discharge system containing the magnetic powder comprises a discharge pipeline, an anti-blocking and wear-resistant residual sludge pump, a high shearing machine and a magnetic separator, a magnetic powder recycling pipe is connected between the magnetic separator and the loading reaction tank, and a residual carbon mud control valve is arranged on the discharge pipeline; the carbon mud recycling pipeline is connected between the carbon mud discharging system containing magnetic powder and the carbon powder reaction tank; the side wall of the carbon powder reaction tank, the side wall of the loading reaction tank, the side wall of the flocculation reaction tank and the side wall of the magnetic coagulation sedimentation tank are all provided with water holes.
In summary, the invention has the following beneficial effects:
(1) The adsorption efficiency of the carbon powder to COD is improved from 15% to more than 30%, and the addition amount of the carbon powder is saved by more than 50%.
(2) The vertical blade stirrer is replaced by the energy-saving submersible stirrer in the carbon powder reaction tank, so that the energy consumption of a motor is reduced by about 70%; the vertical shaft blade stirrer is omitted, stirring energy consumption is saved, and the energy-saving effect is obvious.
(3) The large-channel wear-resistant sludge pump is used for replacing the small-channel centrifugal wear-resistant sludge pump, the blocking frequency of the sludge pump is reduced from 1 day to 1 month to 1 time, and the labor intensity of maintenance is greatly reduced.
(4) The SV on-line detector is adopted to replace an ultrasonic sludge interface instrument, the system operation stability is enhanced, and the effluent of the magnetic coagulation sedimentation tank can realize stable standard discharge without arranging a filtering system.
Drawings
Other features, objects and advantages of the present invention will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the accompanying drawings in which:
Fig. 1 is a schematic diagram of a system structure according to the present invention.
Reference numerals in the drawings: 1. a carbon powder reaction tank; 2. a submersible mixer; 3. loading a reaction tank; 4. loading a stirrer; 5. a flocculation reaction tank; 6. a flocculation mixer; 7. a magnetic coagulation sedimentation tank; 8. a mud scraper; 9. an SV on-line detector; 10. a carbon mud reflux system containing magnetic powder; 11. a carbon sludge discharge system containing magnetic powder; 12. high shearing machine; 13. a char recovery pipeline; 14. a sludge concentration tank; 16. a water inlet pipe; 17. a new carbon powder adding pipe; 18. coagulant adding pipe; 19. a new magnetic powder feeding pipe; 20. PAM adding pipe; 21. a water outlet pipe; 22. anti-blocking wear-resisting backflow sludge pump; 23. anti-blocking wear-resistant residual sludge pump; 24. a magnetic separator; 25. a magnetic powder recycling pipe; 26. and a residual char control valve.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be noted that, for convenience of description, only the portions related to the invention are shown in the drawings.
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
A sewage treatment system for synchronously removing COD, SS and TP is shown in figure 1, the left side of a carbon powder reaction tank 1 is connected with a water inlet pipe 16, and the upper side of the carbon powder reaction tank 1 is connected with a new carbon powder adding pipe 17 and a coagulant adding pipe 18, so that the feeding is facilitated. The novel magnetic powder feeding pipe 19 is connected above the loading reaction tank 3, and the stirring shaft a of the loading stirrer 4 stretches into the inner side of the loading reaction tank 3 to play a role in stirring and mixing.
As shown in fig. 1, a PAM feeding pipe 20 is connected above the flocculation reaction tank 5, and a stirring shaft b of the flocculation stirrer 6 extends into the flocculation reaction tank 5. The right side of the magnetic coagulation sedimentation tank 7 is connected with a water outlet pipe 21, and a scraper is connected with the lower part of the mud scraper 8, so that the sediment sludge at the bottom of the magnetic coagulation sedimentation tank 7 can be collected to a mud bucket.
As shown in fig. 1, the magnetic powder-containing carbon sludge recirculation system 10 comprises a recirculation line and the anti-blocking and wear-resistant recirculation sludge pump 22 adopts a large-channel wear-resistant impeller, so that the problem of frequent blockage of the pump is effectively alleviated. The magnetic powder-containing carbon sludge discharge system 11 comprises a discharge pipeline, an anti-blocking and wear-resistant residual sludge pump 23, a high shear 12 and a magnetic separator 24, wherein a magnetic powder recycling pipe 25 is connected between the magnetic separator 24 and the loading reaction tank 3, and a residual carbon sludge control valve 26 is installed on the discharge pipeline and can control the size of the carbon sludge reflux quantity.
As shown in fig. 1, the side wall of the carbon powder reaction tank 1, the side wall of the loading reaction tank 3, the side wall of the flocculation reaction tank 5 and the side wall of the magnetic coagulation sedimentation tank 7 are all provided with water holes.
When in use, the utility model is characterized in that: the sewage to be deeply treated (generally, the effluent of a sedimentation tank of a secondary biochemical treatment system) enters the carbon powder reaction tank 1 through a sewage pump for pressurization or gravity flow and enters the carbon powder reaction tank 1 through a water inlet pipe 16, a traditional vertical shaft blade stirrer is replaced by a submersible stirrer 2, stirring power is greatly saved, carbon powder is continuously added into the carbon powder reaction tank 1 through a new carbon powder adding pipe 17, suspension flow of the carbon powder in a water body is realized under the mixing effect of the submersible stirrer 2, the carbon powder is contacted with soluble COD in the sewage and adsorbed in active carbon micropores, simultaneously, a coagulant is continuously added into the carbon powder reaction tank 1 through a coagulant adding pipe 18, so that colloidal substances are destabilized and separated out, phosphate particles are produced by phosphate in the water body, the aim of converting soluble TP into insoluble TP particles is fulfilled, the mesh number of the carbon powder is 100-300 mesh, the mesh size is preferably 200 mesh, the adding amount of the carbon powder is determined according to the total amount of COD to be removed, the weight ratio of the general carbon powder to the removal coagulant is 1-10:1, the weight ratio of the coagulant is preferably 5:1, the adding amount of the coagulant is required to be removed, the total water power is preferably 1:1, the weight ratio of the coagulant to be removed is preferably 1:1, the total water power is required to be removed, the water power is preferably 1:1, the weight ratio is required to be removed is 1:1, and the total water power is required to be removed is 1, the total time is 1 to be removed, and the total time is 1 is required to be removed, and the total time is 1;
Then the effluent of the carbon powder reaction tank 1 automatically flows into the loading reaction tank 3, new magnetic powder is added through a new magnetic powder adding pipe 19, meanwhile, the magnetic powder recovered by the magnetic separator 24 continuously flows into the loading reaction tank 3 through a magnetic powder recycling pipe 25, the suspension mixing state of the magnetic powder, the carbon powder and the particulate matters is realized under the stirring and mixing effects of the loading stirrer 4, the magnetic powder and various fine particles in sewage are fully collided, the fine particles are adhered to the surface of the magnetic powder into larger large particles with high specific gravity, the mesh number of the magnetic powder is 100-300 meshes, preferably 150 meshes, the supplementing amount of the magnetic powder is 1-20 mg/L, preferably 5mg/L, and the hydraulic retention time of the loading reaction tank 3 is 1-5 min, preferably 2min;
Then the water discharged from the loading reaction tank 3 automatically flows into the flocculation reaction tank 5, the dissolved PAM is added into the flocculation reaction tank 5 through a PAM adding pipe 20, the suspension mixing state of magnetic powder, carbon powder and particles is realized under the mixing action of a flocculation mixer 6, the particle size of large particles with high specific gravity containing the magnetic powder, the carbon powder and the particles is further increased through the adsorption bridging and the net capturing action of the PAM so as to realize the purpose of rapid precipitation in a magnetic coagulation sedimentation tank 7, the adding amount of the PAM is 0.5-2 mg/L, preferably 1mg/L, and the hydraulic retention time of the flocculation reaction tank 5 is 1-5 min, preferably 4min;
Then the effluent of the flocculation reaction tank 5 automatically flows into the magnetic coagulation sedimentation tank 7, the magnetic coagulation sedimentation tank 7 generally adopts one of a central transmission radial sedimentation tank (recommended preferentially) or a horizontal sedimentation tank or a vertical sedimentation tank, the high-specific gravity large particles containing magnetic powder, carbon powder and particles are precipitated at high speed to realize mud-water separation, the bottom sediment sludge contains carbon powder, magnetic powder, insoluble phosphate particles and various SSs adsorbed with soluble COD, so that the aim of synchronously and efficiently removing COD, TP and SS is realized, the bottom sediment sludge of the magnetic coagulation sedimentation tank 7 is continuously collected to a mud bucket by a mud scraper 8, after the supernatant fluid on the magnetic coagulation sedimentation tank 7 is collected by an effluent weir, the effluent is synchronously removed COD, TP and SS to reach the I V class discharge standard, the standard is discharged or recycled, and the surface load of the magnetic coagulation sedimentation tank 7 is 6-30 m/h, preferably 15m/h;
The anti-blocking and wear-resistant backflow sludge pump 22 of the magnetic powder-containing carbon sludge backflow system 10 backflows magnetic powder, powdered carbon, various particles and the like to the loading reaction tank 3, so that the concentration of the particles in the loading reaction tank 3 is increased, the collision probability of the fine particles is increased, the generation of large-particle particles is facilitated, the capture efficiency of the fine particles is improved, and the adsorption efficiency of the carbon powder to COD is also improved; the anti-blocking wear-resistant backflow sludge pump 22 adopts a large-channel wear-resistant impeller, so that the problem of frequent blockage of the pump is effectively solved, and the sludge backflow ratio is 1-10%, preferably 5%; continuously refluxing the carbon sludge containing magnetic powder at the bottom of the magnetic coagulation sedimentation tank 7 to the loading reaction tank 3 through an anti-blocking wear-resistant reflux sludge pump 22, so as to realize the repeated recycling of the carbon sludge;
When the SV value measured by the SV on-line detector 9 reaches the set upper limit value, the residual sludge quantity is up to the upper limit value, an anti-blocking and wear-resistant residual sludge pump 23 is required to be started, the sludge containing magnetic powder, carbon powder and various particulate matters is lifted to a high shear 12, the magnetic powder, the carbon powder and various particulate matters are stripped through the high-speed shearing action of the high shear 12, the effluent of the high shear 12 automatically flows into a magnetic separator 24, the magnetic powder, the carbon powder and various particulate matters are efficiently separated and recycled through a strong magnetic attraction effect, the recycled magnetic powder flows into a loading reaction tank 3 through a magnetic powder recycling pipe 25 for recycling, when the SV value measured by the SV on-line detector 9 is in the set lower limit value, the anti-blocking and wear-resistant residual sludge pump 23, the high shear 12 and the magnetic separator 24 are automatically stopped, the anti-blocking and wear-resistant residual sludge pump 23 adopts a large-channel wear-resistant impeller, the problem of pump frequency blocking is effectively relieved, the automatic control of discharging residual sludge is realized through the SV on-line detector 9, the problem of purifying sewage treatment system is avoided, and the whole set of water quality system is stable because the residual sludge is degraded due to excessive or too little; the anti-blocking wear-resistant excess sludge pump 23 is used for lifting the carbon sludge containing magnetic powder to the high shearing machine 12 and the magnetic separator 24, so that the magnetic powder is recovered and then automatically flows to the loading reaction tank 3 for repeated use, most of the carbon sludge without the magnetic powder flows back to the carbon powder reaction tank 1, the repeated cyclic utilization of the carbon powder is realized, the adsorption efficiency of the powdered carbon to COD is improved, and the carbon sludge with partial adsorption saturation is discharged to the sludge concentration tank 14;
The opening degree of the residual carbon sludge control valve 26 is controlled to control the size of the carbon sludge reflux quantity, the carbon sludge without the magnetic powder is refluxed to the carbon powder reaction tank 1 to prolong the contact time of the carbon powder and sewage, so that the underutilized micropores continuously adsorb the dissolved COD in the water body, the adsorption rate of the carbon powder adsorbed COD is improved, the consumption of the carbon powder is reduced, the obvious economic value is generated, the ratio of the reflux quantity of the carbon sludge to the residual carbon sludge is 1-4:1, preferably 3:1, the industrial park sewage treatment plant with 4 ten thousand tons/day is taken as an example, the average removal of 30mg/L of difficult biochemical COD is taken as an example, the original system consumes 8 tons of the carbon powder every day, the system of the carbon powder consumes about 4 tons of the carbon powder per day according to the sewage treatment system, the ton water running cost of the carbon powder is about 0.4 yuan/ton of water, the carbon powder is saved by about 4000 yuan per ton per day, the unit price of the carbon powder is saved, and the annual cost is saved about 4000 ten thousand yuan per year.
The above description is only illustrative of the preferred embodiments of the invention and the technical principles employed. Meanwhile, the scope of the present invention is not limited to the technical solutions of the specific combinations of the above technical features, and other technical solutions formed by any combination of the above technical features or the equivalent features thereof without departing from the inventive concept should be covered. Such as the above-mentioned features and the technical features disclosed in the present invention (but not limited to) having similar functions are replaced with each other.
Claims (5)
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| CN202111409180.5A CN113929259B (en) | 2021-11-25 | 2021-11-25 | A sewage treatment system for simultaneous removal of COD, SS and TP |
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| CN114560592B (en) * | 2022-03-17 | 2025-09-19 | 北京沃尔德斯水务科技有限公司 | Granular carbon magnetic coagulation sedimentation tank |
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| CN216236533U (en) * | 2021-11-25 | 2022-04-08 | 天津大拇指环保科技有限公司 | Sewage treatment system for synchronously removing COD (chemical oxygen demand), SS (suspended solid) and TP (thermal transfer protocol) |
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| CN103708594A (en) * | 2013-12-28 | 2014-04-09 | 太平洋水处理工程有限公司 | High-efficiency dense-medium coagulating sedimentation water treatment process |
| CN110386713B (en) * | 2019-07-24 | 2024-05-07 | 青岛思普润水处理股份有限公司 | Super-efficient separation system and method based on magnetic coagulation precipitation and activated carbon adsorption |
| CN213388209U (en) * | 2020-09-03 | 2021-06-08 | 北控水务(中国)投资有限公司 | Compact adds charcoal and adds magnetic medium coagulating sedimentation advanced treatment system |
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| CN216236533U (en) * | 2021-11-25 | 2022-04-08 | 天津大拇指环保科技有限公司 | Sewage treatment system for synchronously removing COD (chemical oxygen demand), SS (suspended solid) and TP (thermal transfer protocol) |
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