Solar-driven two-stage regulating reservoir and two-stage coagulating sedimentation device and method thereof

Abstract

The invention discloses a solar-driven two-stage regulating reservoir and two-stage coagulating sedimentation device and a method thereof, and belongs to the technical field of water treatment. The device comprises a first-stage regulating tank, the output end of the first-stage regulating tank is connected with a first-stage coagulating tank, and the output end of the first-stage coagulating tank is connected with a first-stage sedimentation tank; the output end of the primary sedimentation tank is provided with a secondary regulating tank, the output end of the secondary regulating tank is connected with a secondary coagulating tank, the output end of the secondary coagulating tank is connected with a secondary sedimentation tank, and the output end of the secondary sedimentation tank is connected with a water outlet tank. According to the invention, two-stage regulation and two-stage coagulation devices are integrated, pollutants such as SS, hardness, fluorine-containing wastewater and the like are removed at the same time, the solar driving system completely provides electric energy for the regulation and coagulation sedimentation system, and the operation cost is reduced. The problems that in the prior art, an adjusting tank and a two-stage coagulating sedimentation process are large in occupied area and large in electric energy consumption can be solved, and the sewage treatment efficiency is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of water treatment, and more specifically to a solar-driven two-stage regulating tank and a two-stage coagulation and sedimentation device and a method thereof. Background Art

[0002] In recent years, with the rise of the new energy industry and the increasing requirements for reclaimed water reuse, the requirements for fluoride removal in the new energy industry and hardness removal in reclaimed water reuse all use two-stage regulating tanks and two-stage coagulation and sedimentation processes. Most of the pre-regulation uses a mixer to completely mix and adjust the water volume and water quality, which consumes a lot of electricity. The two-stage coagulation and sedimentation process uses a three-stage mixing method, and the sludge return uses a pump return method, which not only occupies a large area, but also consumes a lot of electricity and has high operating costs. Summary of the invention

[0003] 1. Technical problem to be solved by the invention

[0004] In view of the defects and deficiencies in the prior art, the present invention provides a solar-driven two-stage regulating tank and a two-stage coagulation sedimentation device and a method thereof. The present invention integrates a two-stage regulating and two-stage coagulation device, and simultaneously removes pollutants such as SS, hardness, and fluoride-containing wastewater. The solar-driven system completely provides electrical energy for the regulating and coagulation sedimentation system, thereby reducing operating costs. It can solve the problems of large floor space and high power consumption of regulating tanks and two-stage coagulation sedimentation processes in the prior art, improve the application of two-stage regulating tanks and two-stage coagulation sedimentation technologies, and further improve the efficiency of sewage treatment.

[0005] 2. Technical solution

[0006] In order to achieve the above object, the technical solution provided by the present invention is:

[0007] The present invention discloses a solar-powered two-stage regulating tank and a two-stage coagulation and sedimentation device, comprising a first-stage regulating tank, wherein the output end of the first-stage regulating tank is connected to a first-stage coagulation tank, and the output end of the first-stage coagulation tank is connected to a first-stage sedimentation tank; a second-stage regulating tank is arranged at the output end of the first-stage sedimentation tank, and the output end of the second-stage regulating tank is connected to a second-stage coagulation tank, and the output end of the second-stage coagulation tank is connected to a second-stage sedimentation tank, and the output end of the second-stage sedimentation tank is connected to a water outlet tank.

[0008] Furthermore, the input end of the first-level regulating pool is connected to a water inlet pipe 1, a solar fountain machine is arranged at intervals in the first-level regulating pool, and an adjusting partition is also arranged in the first-level regulating pool.

[0009] Furthermore, the input end of the first-stage coagulation tank is provided with a water inlet pipe 2, and the tank body of the first-stage coagulation tank is provided with an integrated third-stage coagulator;

[0010] The integrated three-stage coagulator is in the form of a three-layer cylinder and is located in the middle of the first-stage coagulation tank;

[0011] The integrated three-stage coagulator is composed of a fast mixing cylinder, a medium mixing cylinder, a flocculation cylinder, and a fast mixing agitator. The fast mixing agitator is arranged in the fast mixing cylinder, and the medium mixing cylinder is arranged between the fast mixing cylinder and the flocculation cylinder.

[0012] The quick mixing cylinder, the medium mixing cylinder and the flocculation cylinder are separated into water flow channels by a circular partition. The upper part of the circular partition between the quick mixing cylinder and the medium mixing cylinder is communicated, and the lower part of the circular partition between the medium mixing cylinder and the flocculation cylinder is communicated.

[0013] Furthermore, one end of the water inlet pipe 2 is connected to the primary regulating tank, and the other end of the water inlet pipe 2 extends into the quick mixing cylinder. The water inlet pipe 2 receives wastewater from the upper part of the primary regulating tank and enters the bottom of the quick mixing cylinder. The wastewater is quickly mixed with the flocculant under the action of the quick mixing agitator. After mixing, the wastewater enters the middle mixing cylinder from top to bottom, and the alum flocs gradually grow in the middle mixing cylinder and flow into the flocculation cylinder from bottom to top.

[0014] The flow velocity of the mixing tube flow channel is 0.8~1.2m / s, and the flow velocity of the flocculation tube flow channel is 0.4~0.7m / s.

[0015] Furthermore, the primary sedimentation tank is composed of a guide plate, an inclined pipe, a water outlet weir, a mud bucket, and a sludge pipe;

[0016] A guide plate 1 is arranged between the primary sedimentation tank and the primary coagulation tank, and water distribution holes are arranged at intervals at the bottom of the guide plate 1. A water flow channel is formed between the guide plate 1 and the primary sedimentation tank, and the flow channel flow velocity is 0.4-0.5m / s, and the water flows into the flow channel from top to bottom;

[0017] The flow rate of each water distribution hole is 0.4m / s;

[0018] The first-level sedimentation tank is provided with an inclined pipe, a water outlet weir is provided at the top of the first-level sedimentation tank, a mud hopper is provided at the bottom of the first-level sedimentation tank, one end of the mud hopper is connected to a sludge pipe, and the angle of the mud hopper is set to 55-60 degrees; the output end of the first-level sedimentation tank is connected to the second-level regulating tank;

[0019] The water flows from the water distribution hole evenly from bottom to top into the inclined pipe 1, the supernatant enters the secondary regulating tank through the outlet weir 1, and the sludge falls into the mud hopper 1.

[0020] Furthermore, the output end of the secondary regulating tank is connected to the input end of the secondary coagulation tank and is provided with a water inlet pipe three, the input end of the water inlet pipe three extends into the secondary regulating tank, the secondary coagulation tank is also provided with an integrated three-stage coagulant, and the output end of the water inlet pipe three extends into the fast mixing cylinder in the secondary coagulation tank.

[0021] Furthermore, a second guide plate is provided between the secondary coagulation tank and the secondary sedimentation tank, and a water distribution hole is also provided at the bottom interval of the second guide plate;

[0022] The secondary sedimentation tank is provided with an inclined pipe 2, a water outlet weir 2 is provided at the top of the secondary sedimentation tank, a mud hopper 2 is provided at the bottom of the secondary sedimentation tank, one end of the mud hopper 2 is connected to a sludge pipe 2, and the output end of the secondary sedimentation tank is connected to a water outlet tank; the output end of the water outlet tank is connected to a water outlet pipe.

[0023] Furthermore, the sludge in the primary sedimentation tank and the secondary sedimentation tank is discharged into the sludge tank by static pressure unpowered sludge discharge, and the static pressure sludge discharge pressure difference is maintained at 1.1 to 1.5 m through the sleeve valve;

[0024] The sludge in the sludge tank flows back to the fast mixing cylinder from bottom to top through the air lift micro-power method;

[0025] The sludge pool is composed of a sludge hopper, a sludge return pipe, and a sleeve valve;

[0026] A sludge hopper three is provided in the sludge pool, and a sleeve valve is provided at the top of the sludge hopper three. The input end of the sleeve valve is connected to the primary sedimentation tank and the secondary sedimentation tank through the sludge pipe one and the sludge pipe two respectively, and the output end of the sludge hopper three is extended to the quick mixing cylinder through the sludge return pipe.

[0027] Furthermore, the first-level regulating pool and the second-level regulating pool regulate water quality and quantity by combining solar fountain machine and hydraulic regulation, the water inflow: solar fountain machine spraying ratio is 1:1-2:1, and the hydraulic regulation form is set with regulating baffles according to the water volume and the pool body, and the channel flow rate between the regulating baffles is 0.2-0.4m / s;

[0028] The primary sedimentation tank, the secondary sedimentation tank and the sludge tank are respectively provided with solar photovoltaic panels, and the variable DC voltage generated by the photovoltaic solar panels is converted into AC power with a mains frequency by a photovoltaic inverter to provide power for the solar fountain machine and the fast mixing mixer;

[0029] The first-level regulating tank, the second-level regulating tank, the first-level coagulation tank and the second-level coagulation tank are all provided with pH online detectors.

[0030] A method for solar-driven two-stage regulating tanks and two-stage coagulation and sedimentation devices, wherein the wastewater has its water quantity and quality regulated in a first-stage regulating tank, a flocculant is added in a first-stage coagulation tank, and after mixing and stirring, it enters a first-stage sedimentation tank; after most of the pollutants in the wastewater are removed, it enters a second-stage regulating tank to regulate the water quality, a flocculant is added in a second-stage coagulation tank, and after mixing and stirring, it enters a second-stage sedimentation tank; the wastewater that meets the standards finally enters an outlet tank; the sludge generated by the first-stage and second-stage sedimentation enters a sludge tank by static pressure.

[0031] 3. Beneficial effects

[0032] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0033] The present invention integrates two-stage regulation and two-stage coagulation devices, and simultaneously removes pollutants such as SS, hardness, and fluoride-containing wastewater. The solar drive system completely provides power for the regulation and coagulation sedimentation system, reducing operating costs. It can solve the problems of large floor space and high power consumption of the regulating tank and two-stage coagulation sedimentation process in the prior art, improve the application of the two-stage regulating tank and two-stage coagulation sedimentation technology, and further improve the sewage treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is the upper plane intention of the present invention;

[0035] Figure 2 It is a schematic diagram of the middle layer plane of the present invention;

[0036] Figure 3 It is a schematic diagram of the lower plane of the present invention;

[0037] Figure 4 The cross-sectional view of the present invention is shown in FIG. Figure 1 ;

[0038] Figure 5 The cross-sectional view of the present invention is shown in FIG. Figure 2 ;

[0039] Figure 6 This is a water distribution hole distribution effect diagram of the present invention;

[0040] Figure 7 It is a local structural diagram of the sleeve valve of the present invention.

[0041] In the figure: 1. Primary regulating tank; 11. Water inlet pipe 1; 12. Solar fountain machine; 13. Adjusting baffle; 2. Primary coagulation tank; 21. Water inlet pipe 2; 22. Integrated three-stage coagulator; 221. Fast mixing cylinder; 222. Medium mixing cylinder; 223. Flocculation cylinder; 224. Fast mixing mixer; 3. Primary sedimentation tank; 31. Guide plate 1; 311. Water distribution hole; 32. Inclined pipe 1; 33. Water outlet weir 1 ; 34. Mud hopper one; 35. Sludge pipe one; 4. Secondary regulating tank; 5. Secondary coagulation tank; 51. Water inlet pipe three; 6. Secondary sedimentation tank; 61. Guide plate two; 62. Inclined pipe two; 63. Outlet weir two; 64. Mud hopper two; 65. Sludge pipe two; 7. Outlet tank; 71. Outlet pipe; 8. Sludge tank; 81. Mud hopper three; 82. Sludge return pipe; 83. Sleeve valve; 9. Solar photovoltaic panel. DETAILED DESCRIPTION

[0042] The present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0043] Example 1

[0044] from Figure 1-7 It can be seen that the solar-powered two-stage regulating tank and two-stage coagulation and sedimentation device of the present embodiment include a first-stage regulating tank 1, the output end of the first-stage regulating tank 1 is connected to a first-stage coagulation tank 2, and the output end of the first-stage coagulation tank 2 is connected to a first-stage sedimentation tank 3; the output end of the first-stage sedimentation tank 3 is provided with a second-stage regulating tank 4, the output end of the second-stage regulating tank 4 is connected to a second-stage coagulation tank 5, the output end of the second-stage coagulation tank 5 is connected to a second-stage sedimentation tank 6, and the output end of the second-stage sedimentation tank 6 is connected to a water outlet tank 7.

[0045] The input end of the first-stage regulating pool 1 is connected to a water inlet pipe 11 , a solar fountain machine 12 is arranged at intervals in the first-stage regulating pool 1 , and a regulating partition 13 is also arranged in the first-stage regulating pool 1 .

[0046] The input end of the primary coagulation tank 2 is provided with a water inlet pipe 21, and the tank body of the primary coagulation tank 2 is provided with an integrated three-stage coagulator 22;

[0047] The integrated three-stage coagulator 22 is in the form of a three-layer cylinder and is located in the middle of the first-stage coagulation tank 2;

[0048] The integrated three-stage coagulator 22 is composed of a quick mixing cylinder 221, a medium mixing cylinder 222, a flocculation cylinder 223, and a quick mixing agitator 224. The quick mixing agitator 224 is arranged in the quick mixing cylinder 221, and the medium mixing cylinder 222 is arranged between the quick mixing cylinder 221 and the flocculation cylinder 223.

[0049] The quick mixing cylinder 221 , the middle mixing cylinder 222 , and the flocculation cylinder 223 are separated into water flow channels by circular partitions. The upper part of the circular partition between the quick mixing cylinder 221 and the middle mixing cylinder 222 is connected, and the lower part of the circular partition between the middle mixing cylinder 222 and the flocculation cylinder 223 is connected.

[0050] One end of the second water inlet pipe 21 is connected to the primary regulating tank 1, and the other end of the second water inlet pipe 21 extends into the quick mixing cylinder 221. The second water inlet pipe 21 receives the wastewater from the upper part of the primary regulating tank 1 and enters the bottom of the quick mixing cylinder 221. The wastewater is quickly mixed with the flocculant under the action of the quick mixing agitator 224. After mixing, the wastewater enters the middle mixing cylinder 222 from top to bottom. The alum flocs gradually grow in the middle mixing cylinder 222 and flow into the flocculation cylinder 223 from bottom to top.

[0051] The flow velocity of the flow channel of the intermediate mixing drum 222 is 0.8-1.2 m / s, and the flow velocity of the flow channel of the flocculation drum 223 is 0.4-0.7 m / s.

[0052] The primary sedimentation tank 3 is composed of a guide plate 31, an inclined pipe 32, a water outlet weir 33, a mud bucket 34, and a sludge pipe 35;

[0053] A guide plate 31 is provided between the primary sedimentation tank 3 and the primary coagulation tank 2. Water distribution holes 311 are provided at intervals at the bottom of the guide plate 31 to allow water to flow evenly into the sedimentation tank. A water flow channel is formed between the guide plate 31 and the primary sedimentation tank 3. The flow velocity of the flow channel is 0.4-0.5 m / s, and the water flows into the flow channel from top to bottom.

[0054] The flow rate of each water distribution hole 311 is 0.4m / s;

[0055] An inclined pipe 32 is arranged in the primary sedimentation tank 3, a water outlet weir 33 is arranged at the top of the primary sedimentation tank 3, a mud hopper 34 is arranged at the bottom of the primary sedimentation tank 3, one end of the mud hopper 34 is connected to a sludge pipe 35, and the angle of the mud hopper 34 is set to 55-60 degrees; the output end of the primary sedimentation tank 3 is connected to the secondary regulating tank 4;

[0056] The water flows through the water distribution hole 311 from bottom to top and evenly enters the inclined pipe 32, the supernatant enters the secondary regulating tank 4 through the outlet weir 33, and the sludge falls into the mud hopper 34.

[0057] The output end of the secondary regulating tank 4 is connected to the input end of the secondary coagulation tank 5, and an inlet pipe 3 51 is provided. The input end of the inlet pipe 3 51 extends into the secondary regulating tank 4. An integrated three-stage coagulator 22 is also provided in the secondary coagulation tank 5. The output end of the inlet pipe 3 51 extends into the fast mixing cylinder 221 in the secondary coagulation tank 5.

[0058] A second guide plate 61 is provided between the secondary coagulation tank 5 and the secondary sedimentation tank 6, and a water distribution hole 311 is also provided at the bottom interval of the second guide plate 61;

[0059] An inclined pipe 62 is arranged in the secondary sedimentation tank 6, an outlet weir 63 is arranged at the top of the secondary sedimentation tank 6, a mud hopper 64 is arranged at the bottom of the secondary sedimentation tank 6, one end of the mud hopper 64 is connected to a sludge pipe 65, the output end of the secondary sedimentation tank 6 is connected to the outlet tank 7; the output end of the outlet tank 7 is connected to the outlet pipe 71.

[0060] The sludge in the primary sedimentation tank 3 and the secondary sedimentation tank 6 is discharged into the sludge tank 8 by static pressure unpowered sludge discharge, and the static pressure sludge discharge pressure difference is maintained at 1.1-1.5m through the sleeve valve 83;

[0061] Maintain the water level of the primary sedimentation tank 3 and the secondary sedimentation tank 6 to be always 1.1 to 1.5 meters higher than the water level of the sludge tank 8;

[0062] The sludge in the sludge tank 8 flows back to the fast mixing drum 221 from bottom to top by air lift micro-power;

[0063] The sludge tank 8 is composed of a sludge hopper 81, a sludge return pipe 82, and a sleeve valve 83;

[0064] A mud hopper 3 81 is provided in the sludge pool 8, and a sleeve valve 83 is provided at the top of the mud hopper 3 81. The input end of the sleeve valve 83 is connected to the primary sedimentation tank 3 and the secondary sedimentation tank 6 through the sludge pipe 1 35 and the sludge pipe 2 65 respectively, and the output end of the mud hopper 3 81 extends to the quick mixing cylinder 221 through the sludge return pipe 82.

[0065] The first-level regulating pool 1 and the second-level regulating pool 4 regulate water quality and quantity by combining a solar fountain machine 12 and hydraulic regulation. The water inflow: water spraying volume ratio of the solar fountain machine 12 is 1:1-2:1. The hydraulic regulation form is provided with an adjusting baffle 13 according to the water volume and the pool body. The flow velocity of the channel between the adjusting baffles 13 is 0.2-0.4 m / s.

[0066] Solar photovoltaic panels 9 are respectively arranged on the primary sedimentation tank 3, the secondary sedimentation tank 6 and the sludge tank 8, and the variable DC voltage generated by the photovoltaic solar panels is converted into AC power of the mains frequency by the photovoltaic inverter to provide power for the solar fountain machine 12 and the fast mixing mixer 224;

[0067] The primary regulating tank 1, the secondary regulating tank 4, the primary coagulation tank 2, and the secondary coagulation tank 5 are all provided with pH online detectors.

[0068] Example 2

[0069] from Figure 1-7 It can be seen that in the method of a solar-powered two-stage regulating tank and a two-stage coagulation and sedimentation device of this embodiment, the water volume and water quality of wastewater are adjusted in the first regulating tank 1, and flocculants are added in the first coagulation tank 2. After mixing and stirring, the wastewater enters the first sedimentation tank 3. After most of the pollutants in the wastewater are removed, the wastewater enters the second regulating tank 4 to adjust the water quality, and flocculants are added in the second coagulation tank 5. After mixing and stirring, the wastewater enters the second sedimentation tank 6. The qualified wastewater finally enters the effluent tank 7; the sludge produced by the first sedimentation 3 and the second sedimentation 6 enters the sludge tank 8 by static pressure.

[0070] The sludge pool 8 is returned to the primary coagulation tank 2 and the secondary coagulation tank 5 by air lift reflux, the primary regulating tank 1 and the secondary regulating tank 4 are regulated by a solar fountain machine 12, and the primary coagulation tank 2 and the secondary coagulation tank 5 are equipped with an integrated three-stage coagulant, and the electricity required by the solar fountain machine 12 and the quick mix mixer 224 is provided by the solar photovoltaic panel 9.

[0071] The present invention integrates two-stage regulation and two-stage coagulation devices, and simultaneously removes pollutants such as SS, hardness, and fluoride-containing wastewater. The solar drive system completely provides power for the regulation and coagulation sedimentation system, reducing operating costs. It can solve the problems of large floor space and high power consumption of the regulating tank and two-stage coagulation sedimentation process in the prior art, improve the application of the two-stage regulating tank and two-stage coagulation sedimentation technology, and further improve the sewage treatment efficiency.

[0072] Example 3

[0073] A solar-driven two-stage regulating tank and a two-stage coagulation sedimentation device according to the present invention include the following steps: treating fluorine-containing wastewater from a factory in southern Jiangsu, with a water volume of 5 tons per hour, setting the regulating time of the first-stage regulating tank 1 to 20 hours, setting the ratio of the solar fountain machine 12 to the water inlet volume to be 1:1, setting four regulating baffles 13, adjusting the flow velocity of the flow channel between the baffles 13 to be 0.3 m / s, setting a pH meter in the regulating tank, adjusting the pH value to 6.5-7.5, adding CaCl2 and PAC to a quick mixing drum 221, and mixing them rapidly with the fluorine-containing wastewater under stirring by a quick mixing agitator 224, and adding PAM to a flocculation drum 223. The generated alum flowers etc. enter the primary sedimentation tank 3, the surface load is 1.0m / s, and the fluorine-containing sludge enters the mud bucket 34 through the inclined tube 32. The treated supernatant enters the effluent weir 33 and flows into the secondary regulating tank 4. The retention time of the regulating tank is 4 hours, and the pH value is adjusted to 6.5-7.5. The sewage undergoes secondary coagulation and sedimentation. The sludge in the primary sedimentation tank 3 and the secondary sedimentation tank 6 is discharged to the sludge tank 8 through the sludge pipe 35 and the sludge pipe 65 respectively. The electricity used by the solar fountain machine 12 and the fast mixing mixer 224 is provided by the solar photovoltaic panel 9, and the average sunshine time of the solar drive system is 9-10 hours. Through two-stage regulation and two-stage coagulation, the removal rate of fluorine-containing wastewater reaches 95%, reducing from 100mg / l to 5mg / l, and the cost of electricity consumption is zero.

[0074] Example 4

[0075] A solar-driven two-stage regulating tank and a two-stage coagulation sedimentation device according to the present invention include the following steps: treating high-hardness wastewater from a factory in Xinjiang, with a water volume of 100 tons per hour, setting the regulating time of the first-stage regulating tank 1 to 5 hours, setting the water volume to a solar fountain machine 12 at a ratio of 1:2, setting 6 regulating baffles 13, adjusting the flow velocity of the flow channel between the baffles 13 to 0.4 m / s, setting a pH meter in the regulating tank, adjusting the pH value to 8-10, adding CaOH2 and lime to a quick mixing drum 221, and mixing them rapidly with water under stirring by a quick mixing agitator 224, and adding PA to a flocculation drum 223. M, the alum flowers etc. produced enter the primary sedimentation tank 3, the surface load is 2.0m / s, and the fluorine-containing sludge enters the mud bucket 34 through the inclined tube 32. The treated supernatant enters the effluent weir 33 and flows into the secondary regulating tank 4. The retention time of the regulating tank is 2 hours, and the pH value is adjusted to 8-10. The sewage is subjected to secondary coagulation and sedimentation. The sludge in the primary sedimentation tank 3 and the secondary sedimentation tank 6 passes through the sludge pipe 35 and the sludge pipe 65 respectively; the electricity used by the solar fountain machine 12 and the fast mixing mixer 224 is provided by the solar photovoltaic panel 9, and the average sunshine time of the solar drive system is 13-16 hours. Through two-stage regulation and two-stage coagulation, the hardness wastewater removal rate reaches 90%, which is reduced from 300mg / l to 30mg / l, and the electricity consumption cost is zero.

[0076] The present invention and its embodiments are described schematically above, and the description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. Therefore, if a person skilled in the art is inspired by it and designs a structural method and an embodiment similar to the technical solution without creativity without departing from the purpose of the invention, they shall all fall within the protection scope of the present invention.

Claims

1. A solar-driven two-stage regulating tank and two-stage coagulation and sedimentation device, comprising a first-stage regulating tank (1), characterized in that: The output end of the primary regulating tank (1) is connected to the primary coagulation tank (2), and the output end of the primary coagulation tank (2) is connected to the primary sedimentation tank (3); the output end of the primary sedimentation tank (3) is provided with a secondary regulating tank (4), the output end of the secondary regulating tank (4) is connected to the secondary coagulation tank (5), the output end of the secondary coagulation tank (5) is connected to the secondary sedimentation tank (6), and the output end of the secondary sedimentation tank (6) is connected to a water outlet tank (7).

2. A solar-driven two-stage regulating tank and two-stage coagulation sedimentation device according to claim 1, characterized in that: The input end of the first-level regulating pool (1) is connected to a water inlet pipe (11), a solar fountain machine (12) is arranged at intervals in the first-level regulating pool (1), and a regulating partition (13) is also arranged in the first-level regulating pool (1).

3. A solar-driven two-stage regulating tank and two-stage coagulation sedimentation device according to claim 2, characterized in that: The input end of the primary coagulation tank (2) is provided with a water inlet pipe 2 (21), and the tank body of the primary coagulation tank (2) is provided with an integrated three-stage coagulator (22); The integrated three-stage coagulator (22) is in the form of a three-layer cylinder and is located in the middle of the first-stage coagulation tank (2); The integrated three-stage coagulator (22) is composed of a fast mixing cylinder (221), a medium mixing cylinder (222), a flocculation cylinder (223), and a fast mixing agitator (224). The fast mixing agitator (224) is arranged in the fast mixing cylinder (221), and the medium mixing cylinder (222) is arranged between the fast mixing cylinder (221) and the flocculation cylinder (223). The quick mixing cylinder (221), the middle mixing cylinder (222) and the flocculation cylinder (223) are separated into water flow channels by a circular partition; the upper part of the circular partition between the quick mixing cylinder (221) and the middle mixing cylinder (222) is connected, and the lower part of the circular partition between the middle mixing cylinder (222) and the flocculation cylinder (223) is connected.

4. A solar-driven two-stage regulating tank and two-stage coagulation sedimentation device according to claim 3, characterized in that: One end of the second water inlet pipe (21) is connected to the primary regulating tank (1), and the other end of the second water inlet pipe (21) extends into the quick mixing cylinder (221). The second water inlet pipe (21) receives wastewater from the upper part of the primary regulating tank (1) and enters the bottom of the quick mixing cylinder (221). The wastewater is rapidly mixed with the flocculant under the action of the quick mixing agitator (224). After mixing, the wastewater enters the middle mixing cylinder (222) from top to bottom, and the alum flocs gradually grow in the middle mixing cylinder (222) and flow from bottom to top into the flocculation cylinder (223). The flow velocity of the flow channel of the intermediate mixing cylinder (222) is 0.8 to 1.2 m / s, and the flow velocity of the flow channel of the flocculation cylinder (223) is 0.4 to 0.7 m / s.

5. A solar-driven two-stage regulating tank and two-stage coagulation sedimentation device according to claim 4, characterized in that: The primary sedimentation tank (3) is composed of a guide plate (31), an inclined pipe (32), a water outlet weir (33), a mud bucket (34), and a sludge pipe (35); A guide plate 1 (31) is arranged between the primary sedimentation tank (3) and the primary coagulation tank (2), and water distribution holes (311) are arranged at intervals at the bottom of the guide plate 1 (31). A water flow channel is formed between the guide plate 1 (31) and the primary sedimentation tank (3), and the flow velocity of the flow channel is 0.4-0.5 m / s, and the water flows into the flow channel from top to bottom; The flow rate of each water distribution hole (311) is 0.4 m / s; The first-level sedimentation tank (3) is provided with an inclined pipe (32), the top of the first-level sedimentation tank (3) is provided with a water outlet weir (33), the bottom of the first-level sedimentation tank (3) is provided with a mud hopper (34), one end of the mud hopper (34) is connected to a sludge pipe (35), and the angle of the mud hopper (34) is set to 55-60 degrees; the output end of the first-level sedimentation tank (3) is connected to a second-level regulating tank (4); The water flows from the water distribution hole (311) uniformly from bottom to top into the inclined pipe 1 (32), the supernatant enters the secondary regulating tank (4) through the outlet weir 1 (33), and the sludge falls into the mud hopper 1 (34).

6. A solar-driven two-stage regulating tank and two-stage coagulation sedimentation device according to claim 5, characterized in that: The output end of the secondary regulating tank (4) is connected to the input end of the secondary coagulation tank (5) and is provided with a water inlet pipe three (51). The input end of the water inlet pipe three (51) extends into the secondary regulating tank (4). An integrated three-stage coagulator (22) is also provided in the secondary coagulation tank (5). The output end of the water inlet pipe three (51) extends into the fast mixing cylinder (221) in the secondary coagulation tank (5).

7. A solar-driven two-stage regulating tank and two-stage coagulation sedimentation device according to claim 6, characterized in that: A second guide plate (61) is provided between the secondary coagulation tank (5) and the secondary sedimentation tank (6), and a water distribution hole (311) is also provided at the bottom interval of the second guide plate (61); The secondary sedimentation tank (6) is provided with a second inclined pipe (62), the top of the secondary sedimentation tank (6) is provided with a second water outlet weir (63), the bottom of the secondary sedimentation tank (6) is provided with a second mud hopper (64), one end of the second mud hopper (64) is connected to a second sludge pipe (65), the output end of the secondary sedimentation tank (6) is connected to a water outlet tank (7); the output end of the water outlet tank (7) is connected to a water outlet pipe (71).

8. A solar-driven two-stage regulating tank and two-stage coagulation sedimentation device according to claim 7, characterized in that: The sludge in the primary sedimentation tank (3) and the secondary sedimentation tank (6) is discharged into the sludge tank (8) by static pressure unpowered sludge discharge, and the static pressure sludge discharge pressure difference is maintained at 1.1 to 1.5 m through the sleeve valve (83); The sludge in the sludge tank (8) flows back to the quick mixing drum (221) from bottom to top by means of air lift micro-power; The sludge pool (8) is composed of a sludge hopper (81), a sludge return pipe (82), and a sleeve valve (83); A mud hopper (81) is provided in the sludge pool (8), a sleeve valve (83) is provided at the top of the mud hopper (81), an input end of the sleeve valve (83) is connected to the primary sedimentation tank (3) and the secondary sedimentation tank (6) through a sludge pipe (35) and a sludge pipe (65) respectively, and an output end of the mud hopper (81) is extended to the quick mixing cylinder (221) through a sludge return pipe (82).

9. A solar-driven two-stage regulating tank and two-stage coagulation sedimentation device according to claim 8, characterized in that: The first-level regulating pool (1) and the second-level regulating pool (4) regulate water quality and quantity by combining a solar fountain machine (12) and hydraulic regulation, the water inflow: water spraying volume ratio of the solar fountain machine (12) is 1:1-2:1, and the hydraulic regulation form is provided with regulating baffles (13) according to the water volume and the pool body, and the flow velocity of the channel between the regulating baffles (13) is 0.2-0.4 m / s; The primary sedimentation tank (3), the secondary sedimentation tank (6) and the sludge tank (8) are respectively provided with solar photovoltaic panels (9), and the variable direct current voltage generated by the photovoltaic solar panels is converted into alternating current with a mains frequency through a photovoltaic inverter to provide electric energy for the solar fountain machine (12) and the fast mixing mixer (224); The first-level regulating tank (1), the second-level regulating tank (4), the first-level coagulation tank (2), and the second-level coagulation tank (5) are all provided with a pH online detector.

10. The method of solar-driven two-stage regulating tank and two-stage coagulation sedimentation device according to claim 9, characterized in that: The wastewater is regulated in the primary regulating tank (1) for water quantity and water quality. A flocculant is added to the primary coagulation tank (2), and after mixing and stirring, the wastewater enters the primary sedimentation tank (3). After most of the pollutants in the wastewater are removed, the wastewater enters the secondary regulating tank (4) for water quality regulation. A flocculant is added to the secondary coagulation tank (5), and after mixing and stirring, the wastewater enters the secondary sedimentation tank (6). The wastewater that meets the standards finally enters the effluent tank (7). The sludge generated by the primary sedimentation (3) and the secondary sedimentation (6) enters the sludge tank (8) by static pressure.

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