CN111115986A - Integrated equipment for treating power station wastewater - Google Patents
Integrated equipment for treating power station wastewater Download PDFInfo
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- CN111115986A CN111115986A CN202010094411.7A CN202010094411A CN111115986A CN 111115986 A CN111115986 A CN 111115986A CN 202010094411 A CN202010094411 A CN 202010094411A CN 111115986 A CN111115986 A CN 111115986A
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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
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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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
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
- C02F2201/007—Modular design
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
Abstract
The invention belongs to the field of sewage treatment equipment manufacturing, and particularly relates to integrated equipment for treating power station wastewater, which is used for carrying out material research and development and equipment design aiming at the problems of high requirement on recycling of power station wastewater and high treatment difficulty in the operation process of a power plant/power station. The equipment integrates the regulating water tank, the mixing tank, the flocculation tank, the sedimentation tank, the main reaction tank, the secondary sedimentation tank, the filtering tank and the water outlet tank, effectively combines all units, saves the occupied area, reduces the investment of the equipment and civil engineering, reduces the hydraulic loss, can be arranged on the ground and also can be buried underground, is easy to finish automatic control, and has simple management and operation; the construction period and the cost of the design are greatly reduced; has the advantages of strong pertinence of the wastewater, good treatment effect, low sludge production, low investment and operation cost, and the like.
Description
Technical Field
The invention belongs to the field of sewage treatment equipment manufacturing, and particularly relates to integrated equipment for treating power station wastewater, which is used for carrying out material research and development and equipment design aiming at the problems of high requirement on recycling of power station wastewater and high treatment difficulty in the operation process of a power plant/power station.
Background
A power plant, also called a power station, is a plant that converts various primary energy sources stored in nature into electric energy. The transformer substation is a place for converting voltage and current, receiving electric energy and distributing electric energy in an electric power system. In the process of working and operating of a power station or a transformer substation, a certain amount of waste water is generated, and if the part of waste water is directly discharged without being treated, serious pollution is generated to the environment. Meanwhile, the national requirements for the wastewater discharge of power stations are becoming stricter, and more power stations require the realization of 'zero discharge' of the whole plant. Therefore, the treatment of power station wastewater is increasingly difficult.
The sources of the power station wastewater include wastewater containing petroleum product pollutants, cleaning water of a coal conveying system and a coal yard, ash flushing and deslagging water, flue gas desulfurization wastewater, chemical water treatment equipment drainage, cooling tower drainage and overflow water, filter backwashing drainage, turbine air cooler drainage, oil cooler cooling water, boiler drainage, jet box drainage and the like. The waste water composition is also very different because of different types of power stations and different raw materials.
The pollutant composition of the power station wastewater mainly comprises ash, oil compounds, salt compounds, scale inhibitor for preventing scaling and SiO2、Al2O3、Fe2O3、CaO、MgO、Na2O、K2Oxides such as O and the like and a small amount of compounds such as germanium, arsenic, mercury and lead generally have black or dark brown appearance, change of suspended solids and COD is large, and a certain amount of tar components and a small amount of heavy metals are contained. The indexes of the power station wastewater quality are represented by high concentration of suspended matters, high conductivity, high content of chloride ions, high hardness, high content of oil pollutants and high chroma.
The characteristics of the power station wastewater:
(1) the power station wastewater contains a large amount of suspended solids and various soluble pollutants, and part of the water quality index is high, so that the treatment difficulty is high;
(2) the change of suspended solids and COD in the wastewater is large, and high requirements are put forward on the impact resistance of the treatment process;
(3) zero discharge of wastewater is required, effluent is recycled completely, and the effluent requirement of the process is high.
Because the waste water has high conductivity, high concentration change of organic pollutants and strict effluent requirement, the waste water is generally not suitable to be treated by a biological method, and the waste water of the power station is mainly treated by ultrafiltration and reverse osmosis treatment at present. Because the waste water contains a large amount of suspended substances and organic matters, a series of pretreatment processes including grating, air flotation, coagulating sedimentation, filtration and the like are required to be arranged before the ultrafiltration and reverse osmosis treatment processes, the process line is long, the investment and operation cost is high, and the ultrafiltration and reverse osmosis processes also have the problems of high investment, repeated chemical cleaning, difficult treatment of the generated concentrated water and the like.
Disclosure of Invention
In order to solve the problems, the invention particularly relates to integrated equipment for treating power station wastewater, and material development and equipment design are carried out aiming at the problems that power station wastewater generated in the production process of a power station is extremely complex in constituent substances and high in water outlet requirement.
An integrated plant for treating power station wastewater, characterized in that the reactor comprises a, a conditioning zone; B. a mixing zone; C. a flocculation zone; D. a settling zone; E. a primary reaction zone; F. a secondary sedimentation zone; G. a filtration zone; H. a water outlet area; c1, a first flocculation zone; c2, a second flocculation zone; c3, a third flocculation zone; e1, anaerobic reaction zone; e2, an aerobic reaction zone; e3, anoxic reaction zone; e4, an aerobic reaction zone; 1. an equipment housing; 2. a water inlet; 3. an overflow port; 4. a mobile box-type grid; 5. a grid guide bar; 6. a removable cover plate; 7. lifting the water pump; 8. a water inlet pipe; 9. a water passing hole; 10. a stirrer; 11. a water passing hole a; 12. a water passing hole b; 13. a water passing hole c; 14. a water passing hole d; 15. an inlet channel a; 16. a guide wall a; 17. an inclined tube a; 18. a water outlet channel a; 19. a mud suction pipe a; 20. a water passing hole e; 21. anaerobic filler; 22. a water passing hole f; 23. aerobic filler a; 24. an aeration disc a; 25. a water passing hole g; 26. anoxic filler; 27. a water passing hole h; 28. aerobic filler b; 29. an aeration disc b; 30. an aeration pipe; 31. a blower; 32. a water passing hole i; 33. an exhaust hole a; 34. an exhaust hole b; 35. a water inlet channel b; 36. a guide wall b; 37. an inclined tube b; 38. a water outlet channel b; 39. a mud suction pipe b; 40. a water passing hole j; 41. a V-shaped water distribution tank; 42. a water passing hole k; 43. filtering the material; 44. a support layer; 45. filtering the plate; 46. filtering the beam; 47. a backwash system; 48. a sewage draining groove; 49. a water outlet channel; 50. a water passing hole m; 51. discharging the water pump; 52. a water outlet pipe; 53 water outlet; 54. a medicine feeding pipe; 55. a dosing machine; 56. a return pipe; 57. a reflux pump.
The adjusting zone A, the mixing zone B, the flocculation zone C, the sedimentation zone D, the main reaction zone E, the secondary sedimentation zone F, the filtering zone G and the water outlet zone H are sequentially arranged in the equipment shell 1 according to the water flow direction; wherein the flocculation area C comprises a first flocculation area C1, a second flocculation area C2 and a third flocculation area C3 which are arranged in sequence according to the water flow direction; the main reaction zone E comprises the anaerobic reaction zone E1, the pre-aerobic reaction zone E2, the anoxic reaction zone E3 and the aerobic reaction zone E4 which are sequentially arranged according to the water flow direction; the upper part of one side of the equipment shell 1 is provided with a water inlet 2 and a water outlet 53; the adjusting area A comprises the movable box-type grating 4, the grating guide rod 5, the movable cover plate 6, the lifting water pump 7 and the water inlet pipe 8; the water inlet 2 is connected with the movable box-type grating 4, and the movable box-type grating 4 is connected with the grating guide rod 5; the movable cover plate 6 is arranged on the equipment shell 1 and is positioned right above the movable box-type grating 4; the lifting water pump 7 is connected with the water inlet pipe 8; the adjusting area A and the mixing area B are connected through the water passing hole 9; the mixing zone B comprises the stirrer 10; the mixing zone B is connected with the flocculation zone C1 through the water passing hole a 11; the flocculation zone C1 is connected with the flocculation zone C2 through the water passing hole b 12; the flocculation zone C2 is connected with the flocculation zone C3 through the water passing hole C13; the flocculation zone C3 is connected with the sedimentation zone D through the water passing hole D14; the settling zone D comprises the water inlet channel a15, the guide wall a16, the inclined pipe a17, the water outlet channel a18 and the sludge suction pipe a 19; the settling zone D is connected with the anaerobic reaction zone E1 through a water passing hole E20; the anaerobic packing 21 is arranged in the anaerobic reaction zone E1; the anaerobic reaction zone E1 is connected with the pre-aerobic reaction zone E2 through the water through hole f 22; the aerobic filler a23, the aeration disc a24 and the air exhaust holes a33 are arranged in the pre-aerobic reaction zone E2; the aeration disc a24 is connected with the aeration pipe 30; the aeration disc a24 is positioned at the lower part of the aerobic filler a 23; the exhaust hole a33 is positioned at the upper part of the aerobic filler a 24; the pre-aerobic reaction zone E2 is connected with the anoxic reaction zone E3 through the water passing hole g 25; the anoxic packing 26 is arranged in the anoxic reaction zone E3; the anoxic reaction zone E3 is connected with the aerobic reaction zone E4 through the water passing hole h 27; the aerobic filler b28, the aeration disc b29 and the air exhaust holes b34 are arranged in the aerobic reaction zone E4; the aeration disc b29 is positioned at the lower part of the aerobic filler b 28; the exhaust hole b34 is positioned at the upper part of the aerobic filler b 28; the aeration disc b29 is connected with the aeration pipe 30; the aeration pipe 30 is connected with the blower 31; the aerobic reaction zone E4 is connected with the secondary sedimentation zone F through the water passing hole i 32; the secondary sedimentation zone F comprises the water inlet channel b35, the guide wall b36, the inclined pipe b37, the water outlet channel b38 and the sludge suction pipe b 39; the secondary sedimentation region F is connected with the filtering region G through a water passing hole j 40; the filtering area G comprises the V-shaped water distribution tank 41, the filtering material 43, the supporting layer 44, the filtering plate 45, the filtering beam 46, the backwashing system 47, the sewage draining tank 48 and the water outlet channel 49; the water passing hole k42 is arranged on the V-shaped water distribution tank 41; the V-shaped water distribution tank 41 is positioned at the upper part of the filter material 43; the filter material 43 is positioned on the upper part of the supporting layer 44; the supporting layer 44 is positioned on the upper part of the filter plate 45; the filter plate 45 is positioned at the upper part of the filter beam 46; the filter beam 46 is positioned at the upper part of the back washing system 47; the back-flushing system 47 is positioned at the upper part of the water outlet channel 49; the filtering area G is connected with the water outlet area H through the water passing hole m 50; the water outlet pump 51 and the water outlet pipe 52 are arranged in the water outlet area H; the water outlet pump 51 is connected with the water outlet pipe 52; the water outlet pipe is connected with the water outlet 53; the dosing pipe 54 is connected with the dosing machine 55; the return pipe 56 is connected to the return pump 57.
Further, the designed residence time of the adjusting area A is 8-24 h;
the equipment shell 1 is cubic, and is made of stainless steel, glass fiber reinforced plastic, carbon steel corrosion-resistant or steel-lined plastic;
the water inlet 2 is a total water inlet of the equipment, and the designed flow rate is 0.9-2.0 m/s;
the overflow port 3 is an overflow water port of the equipment and is connected with an inspection well or an accident water pool outside the system, the ratio of the designed pipe diameter to the diameter of the water inlet is (0.7-1): 1, a large value is selected when the design retention time of the regulating area A is small, and a small value is selected when the design retention time of the regulating area A is large;
the movable box-type grating 4 is a grid-shaped grating, the gap of the designed grating bars is 0.02m, the width of the designed grating bars is 0.01m, manual slag removal is carried out, and during slag removal, the movable box-type grating 4 is lifted out of the equipment shell 1 along a grating guide rod 5 through a movable cover plate 6 and then slag removal is carried out;
the number of the lifting water pumps 7 is more than 2, and at least 1 is reserved;
the designed flow rate of the water inlet pipe 8 is 0.9-1.2 m/s;
the water passing hole 9 is round or rectangular, the designed water passing area is 1.5-2 times of the area of the water inlet pipe, and the designed elevation of the top of the hole is lower than the elevation of the bottom of the overflow port 3;
the mixing zone B is designed to have hydraulic retention time of 1min, the stirrer 10 is arranged in the mixing zone B, the stirrer is a double-layer paddle stirrer, and the shaft power of a stirring motor in unit volume is designed to be 500-600W/m3；
The water passing holes a11 are rectangular, and the designed water passing flow rate is 0.1-0.2 m/s;
the residence time of the first flocculation zone C1 is designed to be 3-4 min;
the water passing holes b12 are rectangular, and the designed water passing flow rate is 0.1-0.2 m/s;
the residence time of the first flocculation zone C2 is designed to be 4-5 min;
the water passing holes c13 are rectangular, and the designed water passing flow rate is 0.1-0.2 m/s;
the residence time of the first flocculation zone C3 is designed to be 5-6 min;
the water passing holes d14 are rectangular, and the designed water passing flow rate is 0.1-0.2 m/s;
the design residence time of the settling zone D is 20min, and the designed rising flow rate of the clear water zone is 1.2-1.5 mm/s;
the designed flow rate of the water inlet channel a15 is 0.5-0.6 m/s;
the design length of the guide wall a16 is 1.0-1.5 m, the included angle between the guide wall a16 and the horizontal plane is 45-60 degrees, and the distance between the guide wall a16 and the bottom of the pool is 1.0-1.2 m;
the inclined tube a17 is a hexagonal honeycomb inclined tube, the horizontal inclination angle is 60 degrees, and the height of the inclined tube is 1.0-1.5 m;
the designed flow rate of the water outlet channel a18 is 0.2-0.3 m/s;
the designed sludge discharge flow rate of the sludge suction pipe a19 is 0.04-0.06 m/s;
the water passing holes e20 are rectangular, and the designed water passing flow rate is 0.08-0.1 m/s;
the residence time of the anaerobic reaction zone E1 is designed to be 1-2 h;
the anaerobic filler 21, the anoxic filler 26, the aerobic filler a23 and the anoxic filler b28 are all composed of graphite oxide, activated carbon and bamboo charcoal fiber non-woven fabrics;
the water passing holes f22 are rectangular, and the designed water passing flow rate is 0.06-0.08 m/s;
the designed retention time of the pre-aerobic reaction zone E2 is 1-2 h;
the aeration discs a24 are microporous aeration discs, a group of aeration discs are arranged under each group of fillers, and the included angle between the disc surface and the plane is 10-15 degrees;
the exhaust holes a33 are positioned right above the filler;
the water passing holes g25 are rectangular, and the designed water passing flow rate is 0.08-0.1 m/s;
the residence time of the anoxic reaction zone E3 is designed to be 1-2 h;
the water passing holes h27 are rectangular, and the designed water passing flow rate is 0.06-0.08 m/s;
the residence time of the aerobic reaction zone E4 is designed to be 6-12 h;
the aeration discs a29 are microporous aeration discs, a group of aeration discs are arranged under each group of fillers, and the included angle between the disc surface and the plane is 10-15 degrees;
the exhaust holes b34 are positioned right above the filler;
the water passing holes i32 are rectangular, and the designed water passing flow rate is 0.2-0.3 m/s;
the residence time of the secondary sedimentation zone F is designed to be 30min, and the rising flow rate of the clear water zone is designed to be 1.1-1.4 mm/s;
the designed flow rate of the water inlet channel b35 is 0.5-0.6 m/s;
the design length of the guide wall b36 is 1.0-1.5 m, the included angle between the guide wall b36 and the horizontal plane is 45-60 degrees, and the distance between the guide wall b36 and the bottom of the pool is 1.0-1.2 m;
the inclined tube b37 is a hexagonal honeycomb inclined tube, the horizontal inclination angle is 60 degrees, and the height of the inclined tube is 1.0-1.5 m;
the designed flow rate of the water outlet channel b38 is 0.2-0.3 m/s;
the designed sludge discharge flow rate of the sludge suction pipe b39 is 0.04-0.06 m/s;
the water passing holes j40 are rectangular, and the designed water passing flow rate is 0.1-0.2 m/s;
the filtering speed of the filtering area G is designed to be 10-15 m/h;
the designed flow rate of the V-shaped water distribution tank 41 is 0.6-0.8 m/s;
the flow rate of the water passing hole k42 is designed to be 0.3-0.5 m/s;
the filter material 43 is a comet type fiber filter material, and the thickness of the filter material layer is 0.3-0.5 m;
the design height of the supporting layer 44 is 0.06-0.10 m;
the design height of the filter plate 45 is 0.03-0.06 m;
the backwashing strength of the backwashing system 47 is 25-28L/(m) when the backwashing strength is independent air blast2S) water flush strength of 6-8L/(m) when flushed with water alone2·s)；
The hydraulic retention time of the sewage discharge tank 48 is designed to be 0.5-1 h;
the designed flow rate of the water outlet channel 49 is 0.3-0.5 m/s;
the flow rate of the water passing hole m50 is designed to be 0.5-0.7 m/s;
the designed retention time of the water outlet zone H is 0.5-2H;
the number of the water outlet pumps 51 is more than 2, and at least 1 is reserved;
the designed flow rate of the water outlet pipe 52 is 0.9-1.2 m/s;
the designed flow rate of the water outlet 53 is 0.9-1.2 m/s;
the drug adding type of the drug adding machine 55 is PAC, and the drug adding amount is 50-200 g/m3；
The reflux ratio of the reflux pump 57 is 50 to 100%.
Further, the specific preparation method of the anaerobic filler 21 and the anoxic filler 26 is as follows:
(1) uniformly mixing sulfuric acid and phosphoric acid according to the volume ratio of 9:1, putting the mixture into an ice-water bath as a mixed solution for later use, adding graphite powder, keeping the ratio of the mass (g) of the graphite powder to the volume (L) of the mixed solution to be (12-15): 1, uniformly mixing, slowly adding potassium permanganate, keeping the ratio of the mass (g) of the potassium permanganate to the volume (L) of the mixed solution to be 50:1, reacting for 1.5h, putting the mixture into a warm water bath, keeping the temperature to be 50 +/-1 ℃, continuously stirring for 8h, putting the mixture into the ice-water bath again, cooling the mixture to 0 ℃, adding deionized water and a hydrogen peroxide solution, keeping the ratio of the volume (L) of the deionized water to the volume (L) of the mixed solution to be (0.5-0.55): 1, keeping the ratio of the volume (L) of the hydrogen peroxide solution (mass fraction of 30%) to the volume (L) of the mixed solution to be (0.5-0.55): 1, finally adding a proper amount of water, transferring the mixture into a dialysis, dialyzing for 72h to obtain graphite oxide for later use;
(2) selecting granular activated carbon, crushing to prepare activated carbon granules with the length of about 2-4mm, soaking the activated carbon granules in 1mol/L hydrochloric acid solution for 24 hours, taking out the activated carbon granules, repeatedly washing the activated carbon granules with deionized water, soaking the activated carbon granules in 1mol/L sodium hydroxide solution for 24 hours, taking out the activated carbon granules, and repeatedly washing the activated carbon granules with deionized water until the activated carbon granules are neutral;
(3) uniformly mixing the graphite oxide prepared in the step (1) and the granular activated carbon treated in the step (2) according to the volume (L) to mass (g) ratio of 1 (2.6-4.2) to obtain a mixture for later use;
(4) a stainless steel wire mesh is selected to be made into a spiral shape and fixed on a central column, the central column is a titanium column, the diameter of the cross section of the titanium column is 0.3-0.5 m, the central column is required to be extended to the outside of the equipment shell 1 when being installed, the length of the part outside the equipment shell 1 is about 10-20 mm, the diameter of the excircle of the tangent plane of the spiral filler is 1-3 m, the number of rings is 3-10, and the included angle between the spiral gradient plane and the plane is 30-45 degrees; the surface density is 200-250 g/m2The bamboo charcoal fiber non-woven fabric is fixed on the front and back surfaces of the spiral net;
(5) coating the mixture on one side, placing the non-woven fabric in an oven, drying at 120 ℃ for 10min, taking out, cooling the surface temperature to 20 ℃, coating the mixture on the non-woven fabric for the second time, placing the non-woven fabric in the oven, drying at 120 ℃ for 10min, taking out, cooling the surface temperature to 20 ℃, coating the mixture on the non-woven fabric for the third time, placing the non-woven fabric in the oven, drying at 120 ℃ for 10min, taking out, cooling the surface temperature to 20 ℃, and repeating the coating-drying steps on the other side for 3 times.
The aerobic filler a23 and the aerobic filler b28 are both composed of graphite oxide, activated carbon and bamboo charcoal fiber non-woven fabrics, and the preparation method comprises the following steps:
(1) the step (1) of anaerobic/anoxic filling;
(2) the step (2) of anaerobic/anoxic filling;
(3) uniformly mixing the graphite oxide prepared in the step (1) and the granular activated carbon treated in the step (2) according to the volume (L) to mass (g) ratio of 1 (3.4-5) to obtain a mixture for later use;
(4) a stainless steel wire mesh is selected to be made into a spiral shape and fixed on a central column, the central column is a titanium column, the diameter of the cross section of the titanium column is 0.3-0.5 m, the central column is required to be extended to the outside of the equipment shell 1 when being installed, the length of the part outside the equipment shell 1 is about 10-20 mm, the diameter of the excircle of the tangent plane of the spiral filler is 1-3 m, the number of rings is 4-12, and the included angle between the spiral gradient plane and the plane is 25-35 degrees; the selected surface density is 150-200 g/m2The bamboo charcoal fiber non-woven fabric is fixed on the front and back surfaces of the spiral net;
(5) the step (5) of anaerobic/anoxic filling.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention is an integrated sewage treatment device, the regulating water tank, the mixing tank, the flocculation tank, the sedimentation tank, the main reaction tank, the secondary sedimentation tank, the filtering tank and the water outlet tank are integrated, and all units are effectively combined, so that the device has the advantages of saving land occupation, reducing equipment and civil engineering investment and reducing hydraulic loss, can be arranged on the ground or buried underground, is easy to finish automatic control, and is simple in management and operation;
2. the invention is a modularized integrated sewage treatment device, and design parameters can be directly selected according to the quality and quantity of the wastewater to be treated, so that the construction period and the cost of the design are greatly reduced;
3. the invention designs and researches fillers aiming at the characteristics of the power station wastewater, and has the advantages of strong wastewater pertinence, good treatment effect, low sludge production, low investment and operation cost and the like.
Drawings
FIG. 1 is a schematic plan view of the apparatus of the present invention.
FIG. 2 is a schematic cross-sectional view of the apparatus of the present invention.
Wherein: A. a conditioning water zone; B. a mixing zone; C. a flocculation zone; D. a settling zone; E. a primary reaction zone; F. a secondary sedimentation zone; G. a filtration zone; H. a water outlet area; c1, a first flocculation zone; c2, a second flocculation zone; c3, a third flocculation zone; e1, anaerobic reaction zone; e2, an aerobic reaction zone; e3, anoxic reaction zone; e4, an aerobic reaction zone; 1. an equipment housing; 2. a water inlet; 3. an overflow port; 4. a mobile box-type grid; 5. a grid guide bar; 6. a grid; 7. lifting the water pump; 8. a water inlet pipe; 9. a water passing hole; 10. a stirrer; 11. a water passing hole 1; 12. a water passing hole 2; 13. a water passing hole 3; 14. a water passing hole 4; 15. an inlet channel 1; 16. a guide wall 1; 17. an inclined tube 1; 18. a water outlet channel 1; 19. a mud suction pipe 1; 20. a water passing hole 5; 21. anaerobic filler; 22. a water passing hole 6; 23. aerobic filler 1; 24. an aeration disc 1; 25. a water passing hole 7; 26. anoxic filler; 27. a water passing hole 8; 28. aerobic filler 2; 29. an aeration disc 2; 30. an aeration pipe; 31. a blower; 32. a water passing hole 9; 33. an exhaust hole 1; 34. an exhaust hole 2; 35. an inlet channel 2; 36. a guide wall 2; 37. an inclined tube 2; 38. a water outlet channel 2; 39. a mud suction pipe 2; 40. a water passing hole 10; 41. a V-shaped water distribution tank; 42. a water passing hole 11; 43. filtering the material; 44. a support layer; 45. filtering the plate; 46. filtering the beam; 47. a backwash system; 48. a sewage draining groove; 49. a water outlet channel; 50. a water passing hole 12; 51. discharging the water pump; 52. a water outlet pipe; 53 water outlet; 54. a medicine feeding pipe; 55. a dosing machine; 56. a return pipe; 57. a reflux pump.
The arrow direction is the water flow direction.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention are described in more detail, the described embodiments are a part of embodiments of the present invention, but not all embodiments, and the present invention is further described below with reference to the embodiments and the accompanying drawings.
As shown in figure 1, the invention particularly relates to integrated equipment for treating power station wastewater, and aims at solving the problems of extremely complex constituent substances and high water outlet requirement of the power station wastewater generated in the production process of a power station, and performing material development and equipment design.
According to the characteristics of the power station wastewater, the investment and the operation cost are considered at the same time, and biochemical treatment is required, but the combination of a general biochemical process and a coagulation method cannot enable the chroma in the power station wastewater to reach a higher effluent standard.
An integrated plant for treating power station wastewater, characterized in that the reactor comprises a, a conditioning zone; B. a mixing zone; C. a flocculation zone; D. a settling zone; E. a primary reaction zone; F. a secondary sedimentation zone; G. a filtration zone; H. a water outlet area; c1, a first flocculation zone; c2, a second flocculation zone; c3, a third flocculation zone; e1, anaerobic reaction zone; e2, an aerobic reaction zone; e3, anoxic reaction zone; e4, an aerobic reaction zone; 1. an equipment housing; 2. a water inlet; 3. an overflow port; 4. a mobile box-type grid; 5. a grid guide bar; 6. a removable cover plate; 7. lifting the water pump; 8. a water inlet pipe; 9. a water passing hole; 10. a stirrer; 11. a water passing hole a; 12. a water passing hole b; 13. a water passing hole c; 14. a water passing hole d; 15. an inlet channel a; 16. a guide wall a; 17. an inclined tube a; 18. a water outlet channel a; 19. a mud suction pipe a; 20. a water passing hole e; 21. anaerobic filler; 22. a water passing hole f; 23. aerobic filler a; 24. an aeration disc a; 25. a water passing hole g; 26. anoxic filler; 27. a water passing hole h; 28. aerobic filler b; 29. an aeration disc b; 30. an aeration pipe; 31. a blower; 32. a water passing hole i; 33. an exhaust hole a; 34. an exhaust hole b; 35. a water inlet channel b; 36. a guide wall b; 37. an inclined tube b; 38. a water outlet channel b; 39. a mud suction pipe b; 40. a water passing hole j; 41. a V-shaped water distribution tank; 42. a water passing hole k; 43. filtering the material; 44. a support layer; 45. filtering the plate; 46. filtering the beam; 47. a backwash system; 48. a sewage draining groove; 49. a water outlet channel; 50. a water passing hole m; 51. discharging the water pump; 52. a water outlet pipe; 53. a water outlet; 54. a medicine feeding pipe; 55. a dosing machine; 56. a return pipe; 57. a reflux pump.
The adjusting zone A, the mixing zone B, the flocculation zone C, the sedimentation zone D, the main reaction zone E, the secondary sedimentation zone F, the filtering zone G and the water outlet zone H are sequentially arranged in the equipment shell 1 according to the water flow direction; wherein the flocculation area C comprises a first flocculation area C1, a second flocculation area C2 and a third flocculation area C3 which are arranged in sequence according to the water flow direction; the main reaction zone E comprises the anaerobic reaction zone E1, the pre-aerobic reaction zone E2, the anoxic reaction zone E3 and the aerobic reaction zone E4 which are sequentially arranged according to the water flow direction; the upper part of one side of the equipment shell 1 is provided with a water inlet 2 and a water outlet 53; the adjusting area A comprises the movable box-type grating 4, the grating guide rod 5, the movable cover plate 6, the lifting water pump 7 and the water inlet pipe 8; the water inlet 2 is connected with the movable box-type grating 4, and the movable box-type grating 4 is connected with the grating guide rod 5; the movable cover plate 6 is arranged on the equipment shell 1 and is positioned right above the movable box-type grating 4; the lifting water pump 7 is connected with the water inlet pipe 8; the adjusting area A and the mixing area B are connected through the water passing hole 9; the mixing zone B comprises the stirrer 10; the mixing zone B is connected with the flocculation zone C1 through the water passing hole a 11; the flocculation zone C1 is connected with the flocculation zone C2 through the water passing hole b 12; the flocculation zone C2 is connected with the flocculation zone C3 through the water passing hole C13; the flocculation zone C3 is connected with the sedimentation zone D through the water passing hole D14; the settling zone D comprises the water inlet channel a15, the guide wall a16, the inclined pipe a17, the water outlet channel a18 and the sludge suction pipe a 19; the settling zone D is connected with the anaerobic reaction zone E1 through a water passing hole E20; the anaerobic packing 21 is arranged in the anaerobic reaction zone E1; the anaerobic reaction zone E1 is connected with the pre-aerobic reaction zone E2 through the water through hole f 22; the aerobic filler a23, the aeration disc a24 and the air exhaust holes a33 are arranged in the pre-aerobic reaction zone E2; the aeration disc a24 is connected with the aeration pipe 30; the aeration disc a24 is positioned at the lower part of the aerobic filler a 23; the exhaust hole a33 is positioned at the upper part of the aerobic filler a 24; the pre-aerobic reaction zone E2 is connected with the anoxic reaction zone E3 through the water passing hole g 25; the anoxic packing 26 is arranged in the anoxic reaction zone E3; the anoxic reaction zone E3 is connected with the aerobic reaction zone E4 through the water passing hole h 27; the aerobic filler b28, the aeration disc b29 and the air exhaust holes b34 are arranged in the aerobic reaction zone E4; the aeration disc b29 is positioned at the lower part of the aerobic filler b 28; the exhaust hole b34 is positioned at the upper part of the aerobic filler b 28; the aeration disc b29 is connected with the aeration pipe 30; the aeration pipe 30 is connected with the blower 31; the aerobic reaction zone E4 is connected with the secondary sedimentation zone F through the water passing hole i 32; the secondary sedimentation zone F comprises the water inlet channel b35, the guide wall b36, the inclined pipe b37, the water outlet channel b38 and the sludge suction pipe b 39; the secondary sedimentation region F is connected with the filtering region G through a water passing hole j 40; the filtering area G comprises the V-shaped water distribution tank 41, the filtering material 43, the supporting layer 44, the filtering plate 45, the filtering beam 46, the backwashing system 47, the sewage draining tank 48 and the water outlet channel 49; the water passing hole k42 is arranged on the V-shaped water distribution tank 41; the V-shaped water distribution tank 41 is positioned at the upper part of the filter material 43; the filter material 43 is positioned on the upper part of the supporting layer 44; the supporting layer 44 is positioned on the upper part of the filter plate 45; the filter plate 45 is positioned at the upper part of the filter beam 46; the filter beam 46 is positioned at the upper part of the back washing system 47; the back-flushing system 47 is positioned at the upper part of the water outlet channel 49; the filtering area G is connected with the water outlet area H through the water passing hole m 50; the water outlet pump 51 and the water outlet pipe 52 are arranged in the water outlet area H; the water outlet pump 51 is connected with the water outlet pipe 52; the water outlet pipe is connected with the water outlet 53; the dosing tube 54 is connected to the dosing machine 55.
Further, the purpose that the regulatory region set up is to adjust quality of water yield, because power station waste water has the waste water and changes greatly, the characteristics that aquatic suspended solid and COD change greatly, consequently sets up the equalizing basin in order to alleviate the change of quality of water yield.
Overflow 3 is the overflow water mouth of equipment, the outer inspection shaft of connected system or accident pond, and the purpose of design is that power station waste water has the unstable characteristics of water yield, and when the condition of the waste water volume increase suddenly appeared, behind the volume that excess waste water surpassed regulation pond, waste water overflow goes out equipment and can cause the pollution, consequently utilizes the overflow mouth to discharge waste water into accident pond or inspection shaft and alleviate water pressure and prevent overflow pollution.
Cross water hole 9 and be circular or rectangle, design the water area and be 1.5-2 times of inlet tube area, the purpose that its set up has threely, firstly makes the inlet tube pass through from the hole, secondly when the water yield exceeds standard, overflow partly waste water to the water yield of follow-up processing unit in order to reduce the overflow to outer system, the third is when the water elevation that comes of pending waste water is higher, but the water pump of deactivation, directly adopt gravity operation mode, reduce the working costs, also be simultaneously that hole top design elevation is less than the reason of the bottom elevation of overflow mouth 3.
The purpose that mixing zone B, flocculation district C and settling zone D set up is that ash content, heavy metal and the suspended substance in the utilization coagulating sedimentation principle gets rid of aquatic, because contain more ash content, heavy metal and suspended substance in the power station waste water, in order to alleviate the pressure of follow-up processing unit, prevents simultaneously that ash content and suspended substance from covering the modified filler that blocks up main reaction zone, sets up the coagulating sedimentation technology.
Further, the design parameters of the mixing zone B, the flocculation zone C and the sedimentation zone D are determined by repeated tests aiming at the water quality characteristics and the water quality variation range of the power station wastewater, including the retention time of the mixing zone B, the motor shaft power of the stirrer 10, the designed water flow rate of the water passing hole a11, the designed retention time of the first flocculation zone C1, the designed water flow rate of the water passing hole B12, the designed retention time of the first flocculation zone C2, the designed water flow rate of the water passing hole C13, the designed retention time of the first flocculation zone C3, the designed water flow rate of the water passing hole D14, the designed retention time of the sedimentation zone D, the rising flow rate of the clean water zone, the designed flow rate of the water inlet channel a15, the designed length of the flow guide wall a16, the included angle with the horizontal plane, the distance from the bottom of the pool, the type selection of the inclined pipe a17, and the water quality variation, The horizontal inclination angle, the design height of the inclined pipe, the design flow rate of the water outlet channel a18, the design sludge discharge flow rate of the sludge suction pipe a19 and the design water flow rate of the water passing hole e20 are all specific to the power station wastewater.
The anaerobic reaction zone E1 adopts the anaerobic filler 21, the anaerobic filler 21 is a modified filler, the anaerobic filler is developed according to power station wastewater, and the anaerobic filler is composed of graphite oxide, activated carbon and bamboo charcoal fiber non-woven fabric, the bamboo charcoal fiber non-woven fabric has permeability and adsorptivity, the filler can be shaped and fixed on an iron net, and the permeability of the filler is not influenced; the graphite oxide is characterized by having micro-conductivity and oxidability, wherein micro-electricity is introduced into the soil environment through the filler and the middle column of the spiral body so as to reduce the conductivity of the wastewater, the activated carbon has adsorptivity and porosity, can adsorb partial pollutants in the wastewater of the power station and also can attach partial anaerobic microorganisms, and the micro-electrolysis, the oxidability, the anaerobic biochemistry, the adsorptivity and the filtration simultaneously play roles in reducing the salinity, the COD value and the chromaticity in the wastewater.
The pre-aerobic reaction zone E2 adopts the aerobic filler a23, and the difference between the aerobic filler a23 and the anaerobic filler 21 is that the content of granular activated carbon is more, the number of loops of a spiral body is more, the included angle between a spiral gradient surface and a plane becomes smaller, and the surface density of the bamboo charcoal fiber non-woven fabric is smaller; the increment of aeration and granular activated carbon is increased to increase biomass, firstly, an anaerobic-aerobic environment is formed with the front part to remove total phosphorus, and secondly, an aerobic-anoxic-aerobic environment is formed with the rear part to remove total nitrogen; the design of the number of the loops of the spiral body and the included angle between the spiral gradient surface and the plane is to increase the retention time of oxygen in the filler while reducing the hydraulic loss; the aeration discs a24 are arranged below each group of fillers and are designed at an angle with the plane, so that the oxygen flow path is improved, the treatment effect is enhanced, and the energy consumption is reduced.
The main reaction zone E is provided with the anaerobic reaction zone E1, the pre-aerobic reaction zone E2, the anoxic reaction zone E3 and the aerobic reaction zone E4, and different modified fillers are selected according to the characteristics of each reaction zone. The research and development of the filler, the design of the reaction area and the design of each component are determined by aiming at the water quality characteristics and the water quality change range of the power station wastewater through repeated tests, firstly, the concentration of COD, total phosphorus and total nitrogen in the wastewater is not high, but the effluent needs to be recycled, therefore, the effluent standard is higher, an anaerobic-preaerobic-anoxic-aerobic sequential unit is arranged, and activated carbon is selected to attach a small part of microorganisms to remove the COD, the total phosphorus and the total nitrogen; secondly, the conductivity in the wastewater is high, and the modified filler is selected to reduce the conductivity and remove part of pollutants by utilizing micro-electrolysis; and thirdly, the types of pollutants in the wastewater are complex, and various pollutants are removed simultaneously by utilizing multiple characteristics of the modified filler.
The secondary sedimentation zone F and the filtration zone G are provided for removing microorganisms, suspended matters and the like.
In conclusion, the performance characteristics of the integrated modified filler treatment equipment designed by the invention are especially developed aiming at the characteristics of treating various pollutants in the power station wastewater, the design parameters are verified and selected for numerous times, and all treatment units are mutually paved but cannot be matched.
Example 1
The water quality of inlet and outlet water of a wastewater treatment system of a certain power station, which adopts the integrated equipment, is shown in the table 1.
TABLE 1 water quality List of inlet and outlet water
| Index (I) | Unit of | Inflow waterQuality of water | Quality of effluent water |
| COD | mg/L | 150 | <30 |
| Electrical conductivity of | μS/cm | 1500 | <450 |
| Total hardness | mg/L | 300 | <250 |
| Chloride compound | mg/L | 55 | <40 |
| Iron | mg/L | 0.4 | <0.1 |
| SS | mg/L | 200 | <10 |
| Total nitrogen | mg/ |
15 | <5 |
| Color intensity | Multiple times | 60 | <30 |
As can be seen from Table 1, the effluent meets the water quality standard of the reclaimed water used as the circulating cooling water in China.
Example 2
The water quality of inlet and outlet water of a certain power station wastewater treatment system adopting the integrated equipment is shown in the table 2.
TABLE 2 water quality List of inlet and outlet water
| Index (I) | Unit of | Quality of inlet water | Quality of effluent water |
| COD | mg/ |
30 | <1 |
| Electrical conductivity of | μS/cm | 1200 | <300 |
| Total hardness | mg/L | 250 | <100 |
| Chloride compound | mg/L | 65 | <50 |
| Iron | mg/L | 0.8 | <0.5 |
| SS | mg/L | 50 | <10 |
| Total phosphorus | mg/L | 5 | <4 |
| Ammonia nitrogen | mg/ |
10 | <1 |
As can be seen from Table 2, the effluent water is higher than the water quality standard of the reclaimed water used as the circulating cooling water in China, and the water quality requirement of the Japan Industrial Water Association for the cooling reuse water is met.
Claims (5)
1. An integrated apparatus for treating power station wastewater, characterized in that: the reactor comprises a, a regulating area; B. a mixing zone; C. a flocculation zone; D. a settling zone; E. a primary reaction zone; F. a secondary sedimentation zone; G. a filtration zone; H. a water outlet area; c1, a first flocculation zone; c2, a second flocculation zone; c3, a third flocculation zone; e1, anaerobic reaction zone; e2, an aerobic reaction zone; e3, anoxic reaction zone; e4, an aerobic reaction zone; 1. an equipment housing; 2. a water inlet; 3. an overflow port; 4. a mobile box-type grid; 5. a grid guide bar; 6. a removable cover plate; 7. lifting the water pump; 8. a water inlet pipe; 9. a water passing hole; 10. a stirrer; 11. a water passing hole a; 12. a water passing hole b; 13. a water passing hole c; 14. a water passing hole d; 15. an inlet channel a; 16. a guide wall a; 17. an inclined tube a; 18. a water outlet channel a; 19. a mud suction pipe a; 20. a water passing hole e; 21. anaerobic filler; 22. a water passing hole f; 23. aerobic filler a; 24. an aeration disc a; 25. a water passing hole g; 26. anoxic filler; 27. a water passing hole h; 28. aerobic filler b; 29. an aeration disc b; 30. an aeration pipe; 31. a blower; 32. a water passing hole i; 33. an exhaust hole a; 34. an exhaust hole b; 35. a water inlet channel b; 36. a guide wall b; 37. an inclined tube b; 38. a water outlet channel b; 39. a mud suction pipe b; 40. a water passing hole j; 41. a V-shaped water distribution tank; 42. a water passing hole k; 43. filtering the material; 44. a support layer; 45. filtering the plate; 46. filtering the beam; 47. a backwash system; 48. a sewage draining groove; 49. a water outlet channel; 50. a water passing hole m; 51. discharging the water pump; 52. a water outlet pipe; 53 water outlet; 54. a medicine feeding pipe; 55. a dosing machine; 56. a return pipe; 57. a reflux pump.
2. The integrated plant for the treatment of power plant wastewater of claim 1, characterized in that: the adjusting zone A, the mixing zone B, the flocculation zone C, the sedimentation zone D, the main reaction zone E, the secondary sedimentation zone F, the filtering zone G and the water outlet zone H are sequentially arranged in the equipment shell 1 according to the water flow direction; wherein the flocculation area C comprises a first flocculation area C1, a second flocculation area C2 and a third flocculation area C3 which are arranged in sequence according to the water flow direction; the main reaction zone E comprises the anaerobic reaction zone E1, the pre-aerobic reaction zone E2, the anoxic reaction zone E3 and the aerobic reaction zone E4 which are sequentially arranged according to the water flow direction; the upper part of one side of the equipment shell 1 is provided with a water inlet 2 and a water outlet 53; the adjusting area A comprises the movable box-type grating 4, the grating guide rod 5, the movable cover plate 6, the lifting water pump 7 and the water inlet pipe 8; the water inlet 2 is connected with the movable box-type grating 4, and the movable box-type grating 4 is connected with the grating guide rod 5; the movable cover plate 6 is arranged on the equipment shell 1 and is positioned right above the movable box-type grating 4; the lifting water pump 7 is connected with the water inlet pipe 8; the adjusting area A and the mixing area B are connected through the water passing hole 9; the mixing zone B comprises the stirrer 10; the mixing zone B is connected with the flocculation zone C1 through the water passing hole a 11; the flocculation zone C1 is connected with the flocculation zone C2 through the water passing hole b 12; the flocculation zone C2 is connected with the flocculation zone C3 through the water passing hole C13; the flocculation zone C3 is connected with the sedimentation zone D through the water passing hole D14; the settling zone D comprises the water inlet channel a15, the guide wall a16, the inclined pipe a17, the water outlet channel a18 and the sludge suction pipe a 19; the settling zone D is connected with the anaerobic reaction zone E1 through a water passing hole E20; the anaerobic packing 21 is arranged in the anaerobic reaction zone E1; the anaerobic reaction zone E1 is connected with the pre-aerobic reaction zone E2 through the water through hole f 22; the aerobic filler a23, the aeration disc a24 and the air exhaust holes a33 are arranged in the pre-aerobic reaction zone E2; the aeration disc a24 is connected with the aeration pipe 30; the aeration disc a24 is positioned at the lower part of the aerobic filler a 23; the exhaust hole a33 is positioned at the upper part of the aerobic filler a 24; the pre-aerobic reaction zone E2 is connected with the anoxic reaction zone E3 through the water passing hole g 25; the anoxic packing 26 is arranged in the anoxic reaction zone E3; the anoxic reaction zone E3 is connected with the aerobic reaction zone E4 through the water passing hole h 27; the aerobic filler b28, the aeration disc b29 and the air exhaust holes b34 are arranged in the aerobic reaction zone E4; the aeration disc b29 is positioned at the lower part of the aerobic filler b 28; the exhaust hole b34 is positioned at the upper part of the aerobic filler b 28; the aeration disc b29 is connected with the aeration pipe 30; the aeration pipe 30 is connected with the blower 31; the aerobic reaction zone E4 is connected with the secondary sedimentation zone F through the water passing hole i 32; the secondary sedimentation zone F comprises the water inlet channel b35, the guide wall b36, the inclined pipe b37, the water outlet channel b38 and the sludge suction pipe b 39; the secondary sedimentation region F is connected with the filtering region G through a water passing hole j 40; the filtering area G comprises the V-shaped water distribution tank 41, the filtering material 43, the supporting layer 44, the filtering plate 45, the filtering beam 46, the backwashing system 47, the sewage draining tank 48 and the water outlet channel 49; the water passing hole k42 is arranged on the V-shaped water distribution tank 41; the V-shaped water distribution tank 41 is positioned at the upper part of the filter material 43; the filter material 43 is positioned on the upper part of the supporting layer 44; the supporting layer 44 is positioned on the upper part of the filter plate 45; the filter plate 45 is positioned at the upper part of the filter beam 46; the filter beam 46 is positioned at the upper part of the back washing system 47; the back-flushing system 47 is positioned at the upper part of the water outlet channel 49; the filtering area G is connected with the water outlet area H through the water passing hole m 50; the water outlet pump 51 and the water outlet pipe 52 are arranged in the water outlet area H; the water outlet pump 51 is connected with the water outlet pipe 52; the water outlet pipe is connected with the water outlet 53; the dosing pipe 54 is connected with the dosing machine 55; the return pipe 56 is connected to the return pump 57.
3. The integrated plant for the treatment of power plant wastewater of claim 1, characterized in that: the designed residence time of the regulating area A is 8-24 h;
the equipment shell 1 is cubic, and is made of stainless steel, glass fiber reinforced plastic, carbon steel corrosion-resistant or steel-lined plastic;
the water inlet 2 is a total water inlet of the equipment, and the designed flow rate is 0.9-2.0 m/s;
the overflow port 3 is an overflow water port of the equipment and is connected with an inspection well or an accident water pool outside the system, the ratio of the designed pipe diameter to the diameter of the water inlet is (0.7-1): 1, a large value is selected when the design retention time of the regulating area A is small, and a small value is selected when the design retention time of the regulating area A is large;
the movable box-type grating 4 is a grid-shaped grating, the gap of the designed grating bars is 0.02m, the width of the designed grating bars is 0.01m, manual slag removal is carried out, and during slag removal, the movable box-type grating 4 is lifted out of the equipment shell 1 along a grating guide rod 5 through a movable cover plate 6 and then slag removal is carried out;
the number of the lifting water pumps 7 is more than 2, and at least 1 is reserved;
the designed flow rate of the water inlet pipe 8 is 0.9-1.2 m/s;
the water passing hole 9 is round or rectangular, the designed water passing area is 1.5-2 times of the area of the water inlet pipe, and the designed elevation of the top of the hole is lower than the elevation of the bottom of the overflow port 3;
the mixing zone B is designed to have hydraulic retention time of 1min, the stirrer 10 is arranged in the mixing zone B, the stirrer is a double-layer paddle stirrer, and the shaft power of a stirring motor in unit volume is designed to be 500-600W/m3；
The water passing holes a11 are rectangular, and the designed water passing flow rate is 0.1-0.2 m/s;
the residence time of the first flocculation zone C1 is designed to be 3-4 min;
the water passing holes b12 are rectangular, and the designed water passing flow rate is 0.1-0.2 m/s;
the residence time of the first flocculation zone C2 is designed to be 4-5 min;
the water passing holes c13 are rectangular, and the designed water passing flow rate is 0.1-0.2 m/s;
the residence time of the first flocculation zone C3 is designed to be 5-6 min;
the water passing holes d14 are rectangular, and the designed water passing flow rate is 0.1-0.2 m/s;
the design residence time of the settling zone D is 20min, and the designed rising flow rate of the clear water zone is 1.2-1.5 mm/s;
the designed flow rate of the water inlet channel a15 is 0.5-0.6 m/s;
the design length of the guide wall a16 is 1.0-1.5 m, the included angle between the guide wall a16 and the horizontal plane is 45-60 degrees, and the distance between the guide wall a16 and the bottom of the pool is 1.0-1.2 m;
the inclined tube a17 is a hexagonal honeycomb inclined tube, the horizontal inclination angle is 60 degrees, and the height of the inclined tube is 1.0-1.5 m;
the designed flow rate of the water outlet channel a18 is 0.2-0.3 m/s;
the designed sludge discharge flow rate of the sludge suction pipe a19 is 0.04-0.06 m/s;
the water passing holes e20 are rectangular, and the designed water passing flow rate is 0.08-0.1 m/s;
the residence time of the anaerobic reaction zone E1 is designed to be 1-2 h;
the anaerobic filler 21, the anoxic filler 26, the aerobic filler a23 and the anoxic filler b28 are all composed of graphite oxide, activated carbon and bamboo charcoal fiber non-woven fabrics;
the water passing holes f22 are rectangular, and the designed water passing flow rate is 0.06-0.08 m/s;
the designed retention time of the pre-aerobic reaction zone E2 is 1-2 h;
the aeration discs a24 are microporous aeration discs, a group of aeration discs are arranged under each group of fillers, and the included angle between the disc surface and the plane is 10-15 degrees;
the exhaust holes a33 are positioned right above the filler;
the water passing holes g25 are rectangular, and the designed water passing flow rate is 0.08-0.1 m/s;
the residence time of the anoxic reaction zone E3 is designed to be 1-2 h;
the water passing holes h27 are rectangular, and the designed water passing flow rate is 0.06-0.08 m/s;
the residence time of the aerobic reaction zone E4 is designed to be 6-12 h;
the aeration discs a29 are microporous aeration discs, a group of aeration discs are arranged under each group of fillers, and the included angle between the disc surface and the plane is 10-15 degrees;
the exhaust holes b34 are positioned right above the filler;
the water passing holes i32 are rectangular, and the designed water passing flow rate is 0.2-0.3 m/s;
the residence time of the secondary sedimentation zone F is designed to be 30min, and the rising flow rate of the clear water zone is designed to be 1.1-1.4 mm/s;
the designed flow rate of the water inlet channel b35 is 0.5-0.6 m/s;
the design length of the guide wall b36 is 1.0-1.5 m, the included angle between the guide wall b36 and the horizontal plane is 45-60 degrees, and the distance between the guide wall b36 and the bottom of the pool is 1.0-1.2 m;
the inclined tube b37 is a hexagonal honeycomb inclined tube, the horizontal inclination angle is 60 degrees, and the height of the inclined tube is 1.0-1.5 m;
the designed flow rate of the water outlet channel b38 is 0.2-0.3 m/s;
the designed sludge discharge flow rate of the sludge suction pipe b39 is 0.04-0.06 m/s;
the water passing holes j40 are rectangular, and the designed water passing flow rate is 0.1-0.2 m/s;
the filtering speed of the filtering area G is designed to be 10-15 m/h;
the designed flow rate of the V-shaped water distribution tank 41 is 0.6-0.8 m/s;
the flow rate of the water passing hole k42 is designed to be 0.3-0.5 m/s;
the filter material 43 is a comet type fiber filter material, and the thickness of the filter material layer is 0.3-0.5 m;
the design height of the supporting layer 44 is 0.06-0.10 m;
the design height of the filter plate 45 is 0.03-0.06 m;
the backwashing strength of the backwashing system 47 is 25-28L/(m) when the backwashing strength is independent air blast2S) water flush strength of 6-8L/(m) when flushed with water alone2·s)；
The hydraulic retention time of the sewage discharge tank 48 is designed to be 0.5-1 h;
the designed flow rate of the water outlet channel 49 is 0.3-0.5 m/s;
the flow rate of the water passing hole m50 is designed to be 0.5-0.7 m/s;
the designed retention time of the water outlet zone H is 0.5-2H;
the number of the water outlet pumps 51 is more than 2, and at least 1 is reserved;
the designed flow rate of the water outlet pipe 52 is 0.9-1.2 m/s;
the designed flow rate of the water outlet 53 is 0.9-1.2 m/s;
the drug adding type of the drug adding machine 55 is PAC, and the drug adding amount is 50-200 g/m3；
The reflux ratio of the reflux pump 57 is 50 to 100%.
4. The integrated plant for the treatment of power plant wastewater of claim 1, characterized in that: the specific preparation method of the anaerobic filler and the anoxic filler comprises the following steps:
(1) uniformly mixing sulfuric acid and phosphoric acid according to the volume ratio of 9:1, putting the mixture into an ice-water bath as a mixed solution for later use, adding graphite powder, keeping the ratio of the mass (g) of the graphite powder to the volume (L) of the mixed solution to be (12-15): 1, uniformly mixing, slowly adding potassium permanganate, keeping the ratio of the mass (g) of the potassium permanganate to the volume (L) of the mixed solution to be 50:1, reacting for 1.5h, putting the mixture into a warm water bath, keeping the temperature to be 50 +/-1 ℃, continuously stirring for 8h, putting the mixture into the ice-water bath again, cooling the mixture to 0 ℃, adding deionized water and a hydrogen peroxide solution, keeping the ratio of the volume (L) of the deionized water to the volume (L) of the mixed solution to be (0.5-0.55): 1, keeping the ratio of the volume (L) of the hydrogen peroxide solution (mass fraction of 30%) to the volume (L) of the mixed solution to be (0.5-0.55): 1, finally adding a proper amount of water, transferring the mixture into a dialysis, dialyzing for 72h to obtain graphite oxide for later use;
(2) selecting granular activated carbon, crushing to prepare activated carbon granules with the length of about 2-4mm, soaking the activated carbon granules in 1mol/L hydrochloric acid solution for 24 hours, taking out the activated carbon granules, repeatedly washing the activated carbon granules with deionized water, soaking the activated carbon granules in 1mol/L sodium hydroxide solution for 24 hours, taking out the activated carbon granules, and repeatedly washing the activated carbon granules with deionized water until the activated carbon granules are neutral;
(3) uniformly mixing the graphite oxide prepared in the step (1) and the granular activated carbon treated in the step (2) according to the volume (L) to mass (g) ratio of 1 (2.6-4.2) to obtain a mixture for later use;
(4) a stainless steel wire mesh is selected to be made into a spiral shape and fixed on a central column, the central column is a titanium column, the diameter of the cross section of the titanium column is 0.3-0.5 m, the central column is required to be extended to the outside of the equipment shell 1 when being installed, the length of the part outside the equipment shell 1 is about 10-20 mm, the diameter of the excircle of the tangent plane of the spiral filler is 1-3 m, the number of rings is 3-10, and the included angle between the spiral gradient plane and the plane is 30-45 degrees; the surface density is 200-250 g/m2The bamboo charcoal fiber non-woven fabric is fixed on the front and back surfaces of the spiral net;
(5) coating the mixture on one side, placing the non-woven fabric in an oven, drying at 120 ℃ for 10min, taking out, cooling the surface temperature to 20 ℃, coating the mixture on the non-woven fabric for the second time, placing the non-woven fabric in the oven, drying at 120 ℃ for 10min, taking out, cooling the surface temperature to 20 ℃, coating the mixture on the non-woven fabric for the third time, placing the non-woven fabric in the oven, drying at 120 ℃ for 10min, taking out, cooling the surface temperature to 20 ℃, and repeating the coating-drying steps on the other side for 3 times.
5. The integrated plant for the treatment of power plant wastewater of claim 1, characterized in that: the aerobic filler is composed of graphite oxide, activated carbon and bamboo charcoal fiber non-woven fabrics, and the preparation method comprises the following steps:
(1) uniformly mixing sulfuric acid and phosphoric acid according to the volume ratio of 9:1, putting the mixture into an ice-water bath as a mixed solution for later use, adding graphite powder, keeping the ratio of the mass (g) of the graphite powder to the volume (L) of the mixed solution to be (12-15): 1, uniformly mixing, slowly adding potassium permanganate, keeping the ratio of the mass (g) of the potassium permanganate to the volume (L) of the mixed solution to be 50:1, reacting for 1.5h, putting the mixture into a warm water bath, keeping the temperature to be 50 +/-1 ℃, continuously stirring for 8h, putting the mixture into the ice-water bath again, cooling the mixture to 0 ℃, adding deionized water and a hydrogen peroxide solution, keeping the ratio of the volume (L) of the deionized water to the volume (L) of the mixed solution to be (0.5-0.55): 1, keeping the ratio of the volume (L) of the hydrogen peroxide solution (mass fraction of 30%) to the volume (L) of the mixed solution to be (0.5-0.55): 1, finally adding a proper amount of water, transferring the mixture into a dialysis, dialyzing for 72h to obtain graphite oxide for later use;
(2) selecting granular activated carbon, crushing to prepare activated carbon granules with the length of about 2-4mm, soaking the activated carbon granules in 1mol/L hydrochloric acid solution for 24 hours, taking out the activated carbon granules, repeatedly washing the activated carbon granules with deionized water, soaking the activated carbon granules in 1mol/L sodium hydroxide solution for 24 hours, taking out the activated carbon granules, and repeatedly washing the activated carbon granules with deionized water until the activated carbon granules are neutral;
(3) uniformly mixing the graphite oxide prepared in the step (1) and the granular activated carbon treated in the step (2) according to the volume (L) to mass (g) ratio of 1 (3.4-5) to obtain a mixture for later use;
(4) the method is characterized in that a stainless steel wire mesh is selected to be made into a spiral shape and fixed on a central column, the central column is a titanium column, the diameter of the cross section of the titanium column is 0.3-0.5 m, the central column is extended to the outside of an equipment shell 1 when being installed, the partial length outside the equipment shell 1 is about 10-20 mm, the diameter of the excircle of a spiral filler section is 1-3 m, the number of rings is 4-12, and the included angle between a spiral gradient surface and a plane is formed25-35 °; the selected surface density is 150-200 g/m2The bamboo charcoal fiber non-woven fabric is fixed on the front and back surfaces of the spiral net;
(5) coating the mixture on one side, placing the non-woven fabric in an oven, drying at 120 ℃ for 10min, taking out, cooling the surface temperature to 20 ℃, coating the mixture on the non-woven fabric for the second time, placing the non-woven fabric in the oven, drying at 120 ℃ for 10min, taking out, cooling the surface temperature to 20 ℃, coating the mixture on the non-woven fabric for the third time, placing the non-woven fabric in the oven, drying at 120 ℃ for 10min, taking out, cooling the surface temperature to 20 ℃, and repeating the coating-drying steps on the other side for 3 times.
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| CN110615531A (en) * | 2019-09-16 | 2019-12-27 | 北京工业大学 | DEAMOX sludge double-reflux AOAO sewage-based deep nitrogen and phosphorus removal device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US5213681A (en) * | 1991-09-09 | 1993-05-25 | T. Kruger, Inc. | Method for biologically removing nitrogen from wastewater |
| CN104355504A (en) * | 2014-11-24 | 2015-02-18 | 富阳鸿祥技术服务有限公司 | Industrial wastewater treatment system |
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| CN106477573A (en) * | 2016-09-22 | 2017-03-08 | 西北师范大学 | A kind of preparation method with colored fascicular texture graphite oxide |
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