CN112694217A - Power plant industrial wastewater treatment system and treatment method - Google Patents
Power plant industrial wastewater treatment system and treatment method Download PDFInfo
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- CN112694217A CN112694217A CN202011531236.XA CN202011531236A CN112694217A CN 112694217 A CN112694217 A CN 112694217A CN 202011531236 A CN202011531236 A CN 202011531236A CN 112694217 A CN112694217 A CN 112694217A
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/125—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using screw filters
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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
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
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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
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
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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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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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
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
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Abstract
The invention discloses a power plant industrial wastewater treatment system and a treatment method, relates to the technical field of power plant industrial wastewater treatment, and aims to solve the problems that the sludge yield is high when wastewater is treated by the existing activated sludge method, but the generated sludge cannot be reused due to more heavy metal ions and unbalanced pH value in the power plant wastewater. One side of equalizing basin upper end is provided with the industrial waste water import, the internally mounted of industrial waste water import has thick grid, thin grid is installed to the below of thick grid, the scum valve is all installed to one side of thick grid and thin grid upper surface, the lower extreme of equalizing basin is provided with the precipitation tank, and the precipitation tank is provided with two, the valve of wasting discharge is installed to the lower extreme of precipitation tank, the waste material calandria is installed to the lower extreme of wasting discharge valve, one side of equalizing basin is provided with elementary sedimentation tank, first mud valve is installed to the lower extreme of elementary sedimentation tank, mud pipe is installed to the lower extreme of first mud valve.
Description
Technical Field
The invention relates to the technical field of power plant industrial wastewater treatment, in particular to a power plant industrial wastewater treatment system and a power plant industrial wastewater treatment method.
Background
The industrial wastewater comprises production wastewater, production sewage and cooling water, and refers to wastewater and waste liquid generated in the industrial production process, wherein the wastewater and the waste liquid contain industrial production materials, intermediate products, byproducts and pollutants generated in the production process, which are lost along with water. The industrial wastewater has various types and complex components. For example, the waste water from electrolytic salt industry contains mercury, the waste water from heavy metal smelting industry contains various metals such as lead and cadmium, the waste water from electroplating industry contains various heavy metals such as cyanide and chromium, the waste water from petroleum refining industry contains phenol, and the waste water from pesticide manufacturing industry contains various pesticides. Because industrial wastewater contains various toxic substances and pollutes the environment, the environment is harmful to human health, so that the industrial wastewater is developed to be comprehensively utilized and turn the harmful into the beneficial, and can be discharged after being treated by adopting corresponding purification measures according to the components and the concentration of pollutants in the wastewater.
The existing power plant industrial wastewater treatment system usually adopts an activated sludge method to decompose organic matters in water so as to achieve the purification effect, but the method has the defects of large sludge production when treating wastewater, more heavy metal ions in the power plant wastewater and unbalanced pH value, so that the generated sludge cannot be reused; therefore, the existing requirements are not met, and a power plant industrial wastewater treatment system and a treatment method are provided for the existing requirements.
Disclosure of Invention
The invention aims to provide a system and a method for treating industrial wastewater of a power plant, which aim to solve the problems that the existing activated sludge method in the background art has large sludge production when treating wastewater, but the power plant wastewater has more heavy metal ions and unbalanced pH value, so that the generated sludge cannot be reused.
In order to achieve the purpose, the invention provides the following technical scheme: a power plant industrial wastewater treatment system comprises an adjusting tank, wherein one side of the upper end of the adjusting tank is provided with an industrial wastewater inlet, the inner part of the industrial wastewater inlet is provided with a coarse grid, a fine grid is arranged below the coarse grid, a slag discharge valve is arranged on one side of the upper surfaces of the coarse grid and the fine grid, the lower end of the adjusting tank is provided with two settling tanks, the lower end of each settling tank is provided with a waste discharge valve, the lower end of each waste discharge valve is provided with a waste material discharge pipe, one side of the adjusting tank is provided with a primary settling tank, the lower end of the primary settling tank is provided with a first mud valve, the lower end of the first mud valve is provided with a mud discharge pipe, one side of the primary settling tank is provided with a biological treatment tank, the lower surface of the inner part of the biological treatment tank is provided with activated sludge, and the inner part of the, the air-blower is installed to the one end of aeration pipe, one side of biological treatment pond is provided with the second grade sedimentation tank, the second mud valve is installed to the lower extreme of second grade sedimentation tank, first sludge pump is installed to the lower extreme of second mud valve, and the output of first sludge pump is linked together through pipeline and biological treatment pond, the lower extreme of first sludge pump is provided with the second sludge pump, and the output and the mud pipe of second sludge pump are linked together, the mud sieve is installed to the one end of mud pipe, one side of second grade sedimentation tank is provided with the disinfection pond.
Preferably, the adjusting tank is communicated with the primary sedimentation tank through a first pumping device, the primary sedimentation tank is communicated with the biological treatment tank through a second pumping device, the biological treatment tank is communicated with the secondary sedimentation tank through a third pumping device, the secondary sedimentation tank is communicated with the disinfection tank through a fourth pumping device, and a fifth pumping device is arranged in the disinfection tank.
Preferably, the outlet end of the mud screen is provided with a drum concentration integrated belt filter press.
Preferably, the support frame is installed to the upper end of equalizing basin, asynchronous machine is installed to the upper end of support frame, install the shaft coupling on asynchronous machine's the output, asynchronous machine's output passes through the shaft coupling and is connected with the transmission of stirring frame.
Preferably, the lower end of the stirring frame is provided with a bearing seat, and the bearing seat is fixedly connected with the inner wall of the regulating tank.
Preferably, the treatment method of the industrial wastewater treatment system of the power plant comprises the following steps:
the method comprises the following steps: conveying the industrial wastewater to a regulating tank from an inlet, and isolating solid impurities in the wastewater by the synergistic effect of a coarse grid and a fine grid at the inlet of the regulating tank;
step two: adding caustic soda or acid into the regulating tank, and controlling the pH value in the tank to be 7-8.5;
step three: continuously adding a proper amount of ion exchanger into the regulating reservoir, starting the asynchronous motor to drive the stirring frame at the output end to rotate, fully mixing the ion exchanger with the aqueous solution, and stopping to ensure that the heavy metal ions which can be exchanged in the ion exchanger neutralization solution are discharged through a waste discharge valve after the heavy metal ions are precipitated at the bottom;
step four: conveying the wastewater in the regulating tank to a primary sedimentation tank through a first pumping device, so that the wastewater is subjected to primary sedimentation to generate sludge, and discharging the sludge through a first slurry valve;
step five: conveying the wastewater in the primary sedimentation tank to a biological treatment tank through a second pumping device, starting an air blower, maintaining the dissolved oxygen content in the water to be about 4mg/l through an aeration pipe, and carrying out aerobic respiration on activated sludge to decompose organic matters in the wastewater and remove pollutants, wherein the aerobic microorganisms are suitable for growth and propagation;
step six: conveying the wastewater in the biological treatment tank to a secondary sedimentation tank through a third pumping device, after secondary sedimentation, returning a proper amount of sludge to the biological treatment tank through a first sludge pump, and conveying the excessive sludge to a sludge discharge pipe through a second pumping device;
step seven: and conveying the aqueous solution in the secondary sedimentation tank to a disinfection tank through a fourth pumping device, adding a proper amount of disinfectant for treatment, and discharging the aqueous solution by a fifth pumping device.
Preferably, in the first step, after the separation of the coarse grid and the fine grid is completed, the solid impurities are discharged through a slag discharge valve on one side.
Preferably, in the fourth step and the sixth step, the discharged sludge enters a slurry sieve along a sludge discharge pipe, internal impurities are sieved by the slurry sieve, the sludge is conveyed to a drum concentration integrated belt filter press, and the sludge is subjected to gravity dehydration and filter press concentration treatment by the drum concentration integrated belt filter press.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, caustic soda or acid is added into the regulating tank, the pH value in the regulating tank is controlled to be 7-8.5, a proper amount of ion exchanger is continuously added into the regulating tank after the pH value is regulated, the asynchronous motor is used for driving the stirring frame at the output end to rotate, so that the exchanger is fully mixed with the aqueous solution, heavy metal ions which can be exchanged in the exchanger and the solution are neutralized, and after precipitation and discharge, sludge generated in the subsequent activated sludge treatment process is not influenced by the pH value of water and heavy metals, the sludge is conveniently recycled after processing treatment, and the recycling rate of resources is improved.
2. Through setting up mud sieve and the concentrated integrative belt filter press of rotary drum, the impurity in mud can be filtered to the mud sieve, and the concentrated integrative belt filter press of rotary drum adopts CXYT series model, and it combines rotary drum thickener and vertical filter press, relies on the dehydration work that the spiral pivoted mode realized mud by rotary drum thickener, relies on vertical filter press extrusion mud again, realizes concentrating, convenient follow-up being used for the agricultural to macerate fertilizer.
3. Through set up biological treatment pond in wastewater treatment system, install the aeration pipe in the biological treatment pond, the aeration pipe passes through air-blower input air to maintain aquatic dissolved oxygen content about 4mg/l, can adapt to aerobic microorganism and grow and breed, let activated sludge carry out aerobic respiration, decompose the organic matter in the sewage, get rid of the pollutant, reach the effect of purifying waste water.
Drawings
FIG. 1 is a schematic view of the overall structure of an industrial wastewater treatment system according to the present invention;
FIG. 2 is a schematic view of the structure of a conditioning tank of the present invention;
FIG. 3 is a schematic view of the structure of a biological treatment tank according to the present invention;
FIG. 4 is a schematic flow diagram of an industrial wastewater treatment system according to the present invention;
FIG. 5 is a schematic view of the treatment process of the industrial wastewater treatment system of the present invention;
in the figure: 1. a regulating tank; 2. an industrial wastewater inlet; 3. coarse grating; 4. fine grids; 5. a slag discharge valve; 6. a settling tank; 7. a waste valve; 8. a waste racking pipe; 9. a support frame; 10. an asynchronous motor; 11. a coupling; 12. a stirring frame; 13. a bearing seat; 14. a first pumping device; 15. a primary sedimentation tank; 16. a first mud valve; 17. a second pumping device; 18. a biological treatment tank; 19. activated sludge; 20. an aeration pipe; 21. a blower; 22. a third pumping means; 23. a secondary sedimentation tank; 24. a second mud valve; 25. a first sludge pump; 26. a second sludge pump; 27. a sludge discharge pipe; 28. a fourth pumping means; 29. a disinfection tank; 30. a fifth pumping device; 31. screening the slurry; 32. and (4) concentrating by a rotary drum and integrating a belt filter press.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-5, an embodiment of the present invention is shown: a power plant industrial wastewater treatment system comprises an adjusting tank 1, one side of the upper end of the adjusting tank 1 is provided with an industrial wastewater inlet 2, a coarse grid 3 is arranged inside the industrial wastewater inlet 2, the coarse grid 3 can preliminarily filter large-particle solid impurities in wastewater, a fine grid 4 is arranged below the coarse grid 3, the fine grid 4 can further filter fine solid impurities in the wastewater, one side of the upper surfaces of the coarse grid 3 and the fine grid 4 is provided with a slag discharge valve 5, the slag discharge valve 5 is used for discharging isolated impurities to avoid blockage, the lower end of the adjusting tank 1 is provided with two settling tanks 6, the lower ends of the settling tanks 6 are provided with waste discharge valves 7, the lower ends of the waste discharge valves 7 are provided with waste discharge pipes 8, one side of the adjusting tank 1 is provided with a primary settling tank 15, the lower end of the primary settling tank 15 is provided with a first slurry valve 16, the lower end of the first slurry valve 16 is provided with a slurry discharge pipe 27, a biological treatment tank 18 is arranged on one side of the primary sedimentation tank 15, activated sludge 19 is arranged on the lower surface inside the biological treatment tank 18, a plurality of aerobic microorganisms are arranged in the activated sludge 19, organic matters in sewage can be decomposed and pollutants can be removed after aerobic respiration is carried out, an aeration pipe 20 is arranged inside the biological treatment tank 18, the aeration pipe 20 can supply oxygen to the sewage, an air blower 21 is arranged at one end of the aeration pipe 20, a secondary sedimentation tank 23 is arranged on one side of the biological treatment tank 18, a second mud valve 24 is arranged at the lower end of the secondary sedimentation tank 23, a first sludge pump 25 is arranged at the lower end of the second mud valve 24, the output end of the first sludge pump 25 is communicated with the biological treatment tank 18 through a pipeline, a second sludge pump 26 is arranged at the lower end of the first sludge pump 25, the output end of the second sludge pump 26 is communicated with a sludge discharge pipe 27, a sludge screen 31 is arranged at one end of the sludge discharge pipe 27, the mud screen 31 can filter the impurity in the mud, and one side of second grade sedimentation tank 23 is provided with disinfection pond 29, and disinfection pond 29 is used for throwing with disinfectant, carries out germicidal treatment to waste water.
Further, the adjusting tank 1 is communicated with the primary sedimentation tank 15 through the first pumping device 14, the primary sedimentation tank 15 is communicated with the biological treatment tank 18 through the second pumping device 17, the biological treatment tank 18 is communicated with the secondary sedimentation tank 23 through the third pumping device 22, the secondary sedimentation tank 23 is communicated with the disinfection tank 29 through the fourth pumping device 28, the fifth pumping device 30 is installed inside the disinfection tank 29, and wastewater conveying is realized among the adjusting tank 1, the primary sedimentation tank 15, the biological treatment tank 18, the secondary sedimentation tank 23 and the disinfection tank 29 through the pumping devices.
Further, the concentrated integrative belt filter press 32 of rotary drum is installed to the exit end of mud sieve 31, and the impurity in the mud can be filtered to mud sieve 31, and concentrated integrative belt filter press 32 of rotary drum adopts CXYT series model, and it combines rotary drum concentrator and vertical filter press, relies on the dehydration work that the spiral rotated mode realized mud by rotary drum concentrator, relies on vertical filter press extrusion mud again, realizes concentrating to the follow-up agricultural is retted fertile.
Further, support frame 9 is installed to the upper end of equalizing basin 1, asynchronous machine 10 is installed to the upper end of support frame 9, install shaft coupling 11 on asynchronous machine 10's the output, asynchronous machine 10's output passes through shaft coupling 11 and stirs frame 12 transmission and is connected, asynchronous machine 10's output can drive and stir frame 12 and rotate, after adding the ion exchanger in equalizing basin 1, rotatory stirring frame 12 can make waste water and exchanger intensive mixing, thereby make the exchangeable heavy metal ion in the exchanger and the solution, convenient sediment discharge.
Further, the bearing seat 13 is installed to the lower extreme of agitator frame 12, and the inner wall fixed connection of bearing seat 13 and equalizing basin 1 is provided with the bearing in the bearing seat 13, can improve its rotation precision when agitator frame 12 is rotatory, stability when guaranteeing to rotate.
Further, the treatment method of the industrial wastewater treatment system of the power plant comprises the following steps:
the method comprises the following steps: industrial wastewater is conveyed to a regulating tank 1 from an inlet, and solid impurities in the wastewater are isolated by the synergistic effect of a coarse grating 3 and a fine grating 4 at the inlet of the regulating tank 1;
step two: adding caustic soda or acid into the regulating tank 1, and controlling the pH value in the tank to be 7-8.5;
step three: continuously adding a proper amount of ion exchanger into the regulating tank 1, starting the asynchronous motor 10, driving the stirring frame 12 at the output end to rotate, fully mixing the exchanger with the aqueous solution and stopping, neutralizing exchangeable heavy metal ions in the solution by the exchanger, and discharging the heavy metal ions through a waste discharge valve after the heavy metal ions are precipitated at the bottom;
step four: conveying the wastewater in the adjusting tank 1 to a primary sedimentation tank 15 through a first pumping device 14, performing primary sedimentation to generate sludge, and discharging the sludge through a first slurry valve 16;
step five: conveying the wastewater in the primary sedimentation tank 15 to a biological treatment tank 18 through a second pumping device 17, starting an air blower 21, maintaining the dissolved oxygen content in the water to be about 4mg/l through an aeration pipe 20, and carrying out aerobic respiration on activated sludge 19 to decompose organic matters in the wastewater and remove pollutants by using aerobic microorganisms to grow and breed;
step six: the wastewater in the biological treatment tank 18 is conveyed to a secondary sedimentation tank 23 through a third pumping device 22, after secondary sedimentation, a proper amount of sludge is returned to the biological treatment tank 18 through a first sludge pump 25, and the excess sludge is conveyed to a sludge discharge pipe 27 through a second pumping device 17;
step seven: the water solution in the secondary sedimentation tank 23 is conveyed to a disinfection tank 29 through a fourth pumping device 28, and is discharged through a fifth pumping device 30 after being treated by adding a proper amount of disinfectant.
Further, in the first step, after the coarse grating 3 and the fine grating 4 are separated, solid impurities are discharged through the slag discharge valve 5 on one side, and blockage caused by accumulation of waste residues in the gap between the coarse grating 3 and the fine grating 4 is avoided.
Further, in the fourth step and the sixth step, the discharged sludge enters the slurry screen 31 along the sludge discharge pipe 27, internal impurities are screened off by the slurry screen 31, the sludge is conveyed to the drum concentration integrated belt filter press 32, and the sludge is subjected to gravity dehydration and filter press concentration treatment by the drum concentration integrated belt filter press 32, so that the agricultural use is facilitated.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (8)
1. The utility model provides a power plant's industrial waste water treatment system, includes equalizing basin (1), its characterized in that: one side of the upper end of the adjusting tank (1) is provided with an industrial wastewater inlet (2), the internal installation of the industrial wastewater inlet (2) is provided with a coarse grating (3), a fine grating (4) is installed below the coarse grating (3), a residue discharge valve (5) is installed on one side of the upper surfaces of the coarse grating (3) and the fine grating (4), the lower end of the adjusting tank (1) is provided with a settling tank (6), the settling tank (6) is provided with two settling tanks, a waste discharge valve (7) is installed at the lower end of the settling tank (6), a waste material exhaust pipe (8) is installed at the lower end of the waste discharge valve (7), a primary settling tank (15) is arranged on one side of the adjusting tank (1), a first slurry valve (16) is installed at the lower end of the primary settling tank (15), a slurry discharge pipe (27) is installed at the lower end of the first slurry valve (16), a biological treatment tank (18) is arranged on one side of the, the lower surface in the biological treatment tank (18) is provided with activated sludge (19), an aeration pipe (20) is arranged in the biological treatment tank (18), one end of the aeration pipe (20) is provided with a blower (21), a secondary sedimentation tank (23) is arranged on one side of the biological treatment tank (18), a second slurry valve (24) is arranged at the lower end of the secondary sedimentation tank (23), a first sludge pump (25) is arranged at the lower end of the second sludge valve (24), and the output end of the first sludge pump (25) is communicated with the biological treatment tank (18) through a pipeline, the lower end of the first sludge pump (25) is provided with a second sludge pump (26), and the output end of the second sludge pump (26) is communicated with a sludge discharge pipe (27), one end of the sludge discharge pipe (27) is provided with a sludge screen (31), and one side of the secondary sedimentation tank (23) is provided with a disinfection tank (29).
2. A power plant industrial wastewater treatment system and method according to claim 1, characterized in that: the adjusting tank (1) is communicated with a primary sedimentation tank (15) through a first pumping device (14), the primary sedimentation tank (15) is communicated with a biological treatment tank (18) through a second pumping device (17), the biological treatment tank (18) is communicated with a secondary sedimentation tank (23) through a third pumping device (22), the secondary sedimentation tank (23) is communicated with a disinfection tank (29) through a fourth pumping device (28), and a fifth pumping device (30) is installed inside the disinfection tank (29).
3. A power plant industrial wastewater treatment system and method according to claim 1, characterized in that: and a drum concentration integrated belt type filter press (32) is arranged at the outlet end of the mud screen (31).
4. A power plant industrial wastewater treatment system and method according to claim 1, characterized in that: support frame (9) are installed to the upper end of equalizing basin (1), asynchronous machine (10) are installed to the upper end of support frame (9), install shaft coupling (11) on the output of asynchronous machine (10), the output of asynchronous machine (10) is passed through shaft coupling (11) and is connected with stirring frame (12) transmission.
5. The power plant industrial wastewater treatment system and method of claim 4, wherein: and a bearing seat (13) is installed at the lower end of the stirring frame (12), and the bearing seat (13) is fixedly connected with the inner wall of the adjusting tank (1).
6. The treatment method of the industrial wastewater treatment system of the power plant according to any one of the claims 1 to 5, characterized by comprising the following steps:
the method comprises the following steps: industrial wastewater is conveyed to a regulating tank (1) from an inlet, and solid impurities in the wastewater are isolated by the synergistic effect of a coarse grating (3) and a fine grating (4) at the inlet of the regulating tank (1);
step two: adding caustic soda or acid into the regulating tank (1), and controlling the pH value in the tank to be 7-8.5;
step three: continuously adding a proper amount of ion exchanger into the regulating tank (1), starting the asynchronous motor (10), driving the stirring frame (12) at the output end to rotate, fully mixing the exchanger with the aqueous solution, and stopping to ensure that the heavy metal ions which can be exchanged in the exchanger and the solution are discharged through a waste discharge valve after the heavy metal ions are precipitated at the bottom;
step four: conveying the wastewater inside the adjusting tank (1) to a primary sedimentation tank (15) through a first pumping device (14), primarily sedimentating the wastewater to generate sludge, and discharging the sludge through a first slurry valve (16);
step five: conveying the wastewater in the primary sedimentation tank (15) to a biological treatment tank (18) through a second pumping device (17), starting an air blower (21), maintaining the dissolved oxygen content in the water to be about 4mg/l through an aeration pipe (20), so as to be suitable for aerobic microorganisms to grow and reproduce, carrying out aerobic respiration on activated sludge (19), decomposing organic matters in the wastewater, and removing pollutants;
step six: the wastewater in the biological treatment tank (18) is conveyed to a secondary sedimentation tank (23) through a third pumping device (22), after secondary sedimentation, a proper amount of sludge is returned to the biological treatment tank (18) through a first sludge pump (25), and the excess sludge is conveyed to a sludge discharge pipe (27) through a second pumping device (17);
step seven: and the water solution in the secondary sedimentation tank (23) is conveyed to a disinfection tank (29) through a fourth pumping device (28), and is discharged through a fifth pumping device (30) after being treated by adding a proper amount of disinfectant.
7. The treatment method of the power plant industrial wastewater treatment system according to claim 6, characterized in that: in the first step, after the coarse grating (3) and the fine grating (4) are separated, solid impurities are discharged through a slag discharge valve (5) on one side.
8. The treatment method of the power plant industrial wastewater treatment system according to claim 6, characterized in that: in the fourth step and the sixth step, the discharged sludge enters a mud screen (31) along a mud discharge pipe (27), internal impurities are screened off by the mud screen (31), the sludge is conveyed to a drum concentration integrated belt filter press (32), and the sludge is subjected to gravity dehydration and filter press concentration treatment by the drum concentration integrated belt filter press (32).
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114956448A (en) * | 2022-04-26 | 2022-08-30 | 浙江恒加环境工程有限公司 | Sludge cleaning device and industrial sewage regeneration treatment system |
| CN115448551A (en) * | 2022-10-24 | 2022-12-09 | 江苏金茂源生物化工有限责任公司 | Aerobic wastewater recycling treatment device and process |
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