Water supply plant production wastewater resource recycling device

Abstract

The utility model discloses a water supply plant production wastewater resource recycling device, which relates to the technical field of wastewater treatment devices and comprises a PH regulating tank, a water inlet pipe is mounted at the side end of the PH regulating tank, a tank sealing cover is mounted at the upper end of the PH regulating tank, an acid feeding pipe is arranged at the upper end of the tank sealing cover, a rotation hole is formed in the middle end of the tank sealing cover, and a water inlet pipe is mounted at the side end of the PH regulating tank. A stirring shaft blade is mounted at the middle end of the rotating hole, and a first mixing stirrer is mounted at the upper end of the stirring shaft blade. Through the arrangement of the PH regulating tank, the sedimentation tank, the sludge collecting hopper, the sludge concentration area, the sludge discharge pipe, the sludge scraper, the sludge scraping frame, the sedimentation inclined pipe, the water outlet and water collecting tank and the water outlet pipe, the sludge scraper drives the sludge scraping frame to rotate and scrape to the sludge collecting hopper, clear water is collected and collected to the upper end of the sedimentation tank through the water outlet and water collecting tank, and the turbidity of the clear water is stabilized below 3NTU at the moment; and most of the 2-methylisoborneol is removed, so that the environmental protection effect of the device is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to wastewater treatment device technical field, concretely is a water supply plant production wastewater resource recycling device. BACKGROUND

[0002] The water purification process commonly used in the current water supply plant is coagulation-sedimentation-filtration-disinfection process flow, and the production wastewater generated in the water purification production process mainly consists of two parts of sludge water discharged by the sedimentation tank and backwash water of the filter tank, and the water quantity can account for 5% to 10% of the total water production quantity of the water plant. Taking a water supply plant with a treatment scale of 100,000 cubic meters per day as an example, the production wastewater quantity generated per day is as high as 5,000 to 10,000 cubic meters. If this part of water is directly discharged, not only environmental pollution is caused, but also a great waste of water resources. Therefore, it is very necessary to resource recycle this part of water. According to the newly issued "Drinking Water Health Standards" (GB 5749-2022) in China, more attention is paid to sensory indicators, and 2-methyl isopinocamphor and geosmin, two odor substance indicators, are newly added. 2-methyl isopinocamphor is mainly derived from algal metabolites dominated by anabaena, phormidium, and oscillatory algae. Therefore, the phenomenon of exceeding the standard is common in water supply plants with surface water as the water source. The sludge discharge of the sedimentation tank and the backwash water of the filter tank are concentrated and enriched with 2-methyl isopinocamphor. If they are not treated and directly returned to the main treatment process section, they will have a serious impact on water quality. 2-methyl isopinocamphor is difficult to be oxidized by conventional water treatment oxidizing agents such as liquid chlorine, sodium hypochlorite, chlorine dioxide, and potassium permanganate, and the ozone oxidation effect is also not good. Therefore, a water supply plant production wastewater resource recycling device is needed.

[0003] The existing water supply plant production wastewater resource recycling device cannot effectively and efficiently treat and recycle the production wastewater of the water supply plant to improve the environmental protection effect of the device, and cannot effectively improve the efficiency of removing 2-methyl isopinocamphor. Therefore, a water supply plant production wastewater resource recycling device is urgently needed. UTILITY MODEL CONTENT

[0004] Therefore, the utility model aims to provide a water supply plant production wastewater resource recycling device to solve the problem that the existing water supply plant production wastewater resource recycling device cannot effectively and efficiently treat and recycle the production wastewater of the water supply plant to improve the environmental protection effect of the device, and cannot effectively improve the efficiency of removing 2-methyl isopinocamphor.

[0005] In order to achieve the above object, the utility model provides the following technical scheme: a water supply plant production wastewater resource recycling device, including PH adjusting pool, the water inlet pipe is installed to the side end of PH adjusting pool, the pool cover is installed to the upper end of PH adjusting pool, the acid adding pipe is opened to the upper end of pool cover, the transition hole is opened to the middle end of pool cover, the stirring axle leaf is installed to the middle end of transition hole, the first mixing stirrer is installed to the upper end of stirring axle leaf, the clamping groove is opened to the inner end of PH adjusting pool, the upper baffle is installed to the inner end of clamping groove, the oxidation reaction pool is installed to the rear end of PH adjusting pool, the lower baffle is installed to the inner end of oxidation reaction pool, the catalyst adding pipe is installed to the upper end of oxidation reaction pool, the second mixing stirrer is installed to the middle end of oxidation reaction pool, the oxidant adding pipe is installed to the upper end of oxidation reaction pool, the neutralization pool is installed to the rear end of oxidation reaction pool, the calcium hydroxide adding pipe is installed to the upper end of neutralization pool, the third mixing stirrer is installed to the middle end of neutralization pool, the coagulation pool is installed to the rear end of neutralization pool, the flocculating agent adding pipe is installed to the upper end of coagulation pool, the flocculation reaction stirrer is installed to the upper end of coagulation pool.

[0006] The water inlet area is installed to the rear end of coagulation pool, the sedimentation tank is installed to the rear end of water inlet area, the sludge collecting hopper is installed to the lower end of sedimentation tank, the sludge concentration area is installed to the lower end of sludge collecting hopper, the sludge discharge pipe is installed to the side end of sludge collecting hopper, the sludge scraper is installed to the upper end of sedimentation tank, the sludge scraping frame is installed to the lower end of sludge scraper, the sludge driving plate is installed to the lower end of sludge scraping frame, the sedimentation inclined pipe is installed to the middle end of sedimentation tank, the water outlet collecting tank is installed to the upper end of sedimentation inclined pipe, and the water outlet pipe is installed to the side end of water outlet collecting tank.

[0007] Preferably, the pool cover is threadedly connected with the PH adjusting pool, and the stirring axle leaf is rotatably connected with the pool cover through the transition hole.

[0008] Preferably, the upper baffle is clamped and connected with the PH adjusting pool through the clamping groove, and the clamping groove is symmetrically arranged along the central axis of the PH adjusting pool.

[0009] Preferably, the lower baffle is clamped and connected with the oxidation reaction pool through the clamping groove, and the lower baffle is open at the upper end.

[0010] Preferably, the sludge scraping frame is rotatably connected with the sludge collecting hopper through the sludge scraper, and the lower end surface of the sludge scraping frame is tightly attached to the inner end surface of the sludge collecting hopper.

[0011] Preferably, the sludge driving plate is rotatably connected with the sludge concentration area through the sludge scraper, and the sedimentation inclined pipe is clamped and connected with the sedimentation tank.

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] 1. The utility model discloses a PH adjusting pool, sedimentation tank, sludge collecting hopper, sludge concentration area, sludge discharge pipe, mud scraper, mud scraper frame, sedimentation inclined pipe, water outlet water collecting tank and water outlet pipe are set up through setting, and the sludge concentration area is concentrated to sludge concentration area through the sedimentation inclined pipe deposition, and then the mud scraper frame is rotated to the sludge collecting hopper through the mud scraper, and the mud is discharged to the water supply plant sludge treatment system dehydration treatment through the mud driving plate regularly, and the clear water is collected to the upper end of the sedimentation tank out through the water outlet water collecting tank, at this time, the turbidity of the clear water is stabilized below 3NTU, and most of 2-methyl isochromanols are removed, and the clear water can be used after further filtration and disinfection through the water outlet pipe and the water supply plant filter, so that the production wastewater of the water supply plant is treated and recycled efficiently, the environmental protection problem caused by direct discharge is solved, the water resource is fully utilized, and the environmental protection effect of the device is improved.

[0014] 2. The utility model discloses a PH adjusting pool, inlet pipe, acid adding pipe, stirring shaft blade, first mixing stirrer, oxidation reaction tank, upper baffle, catalyst adding pipe, neutralization tank, calcium hydroxide adding pipe and oxidant adding pipe are set up, and the production wastewater collected by the drainage pool is sent into the inlet pipe continuously through the pump, and sulfuric acid or hydrochloric acid is added through the acid adding pipe, and after the PH of the wastewater is reduced to three to five under the stirring of the first mixing stirrer and the stirring shaft blade, enters the oxidation reaction tank from the lower end of the upper baffle, and the catalyst and oxidant H2O2 are added from the catalyst adding pipe and the oxidant adding pipe respectively, under the acidic environment, H2O2 reacts with Fe2+ in the catalyst to generate the oxidizing power extremely strong hydroxyl radical (·OH), superoxide radical (·O2-) and the like, and the oxidation of the free radical is much stronger than that of potassium permanganate, sodium hypochlorite and other conventional water treatment oxidizing agents, can directly oxidize and remove 2-methyl isochromanols in water, and Fe3+ generated by the reaction of Fe2+ in the catalyst can also be used as a coagulant to react with suspended solids in water, in the neutralization tank, calcium hydroxide is added through the calcium hydroxide adding pipe, the PH of the water is neutralized and improved to neutral, and the calcium ion concentration in the water can also be increased, the 2-methyl isochromanols in the production wastewater are removed by the advanced oxidation technology, the influence on water quality caused by direct reuse is avoided, and the efficiency of the device in removing 2-methyl isochromanols is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the front view three-dimensional structure schematic diagram of the utility model;

[0016] Figure 2 It is the sectional view structure schematic diagram of the utility model;

[0017] Figure 3 It is the enlarged structure schematic diagram of the lower baffle of the utility model;

[0018] Figure 4 It is the structure schematic diagram of the utility model Figure 2 A place of the utility model.

[0019] In the diagram: 1. pH adjustment tank; 2. Inlet pipe; 3. Tank cover; 4. Acid dosing pipe; 5. Receiver / rotor hole; 6. Agitator shaft blades; 7. First mixing mixer; 8. Oxidation reaction tank; 9. Slot; 10. Upper baffle; 11. Catalyst dosing pipe; 12. Second mixing mixer; 13. Neutralization tank; 14. Calcium hydroxide dosing pipe; 15. Third mixing mixer; 16. Lower baffle; 17. Coagulation tank; 18. Flocculant dosing pipe; 19. Flocculation reaction mixer; 20. Inlet area; 21. Sedimentation tank; 22. Sludge hopper; 23. Sludge thickening area; 24. Sludge discharge pipe; 25. Sludge scraper; 26. Sludge scraper frame; 27. Sedimentation inclined tube; 28. Effluent collection trough; 29. ​​Effluent pipe; 30. Oxidant dosing pipe; 31. Sludge removal plate. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0021] The embodiments of this utility model will be described below based on its overall structure.

[0022] Please see Figures 1-4A wastewater recycling device for a water treatment plant includes a pH adjustment tank 1, an inlet pipe 2 installed on the side of the pH adjustment tank 1, a sealing cover 3 installed on the upper end of the pH adjustment tank 1, an acid dosing pipe 4 opened on the upper end of the sealing cover 3, a receiving hole 5 opened in the middle of the sealing cover 3, a stirring shaft 6 installed in the middle of the receiving hole 5, a first mixing mixer 7 installed on the upper end of the stirring shaft 6, a slot 9 opened in the inner end of the pH adjustment tank 1, an upper baffle 10 installed in the inner end of the slot 9, an oxidation reaction tank 8 installed at the rear end of the pH adjustment tank 1, a lower baffle 16 installed in the inner end of the oxidation reaction tank 8, a catalyst dosing pipe 11 installed on the upper end of the oxidation reaction tank 8, and a catalyst dosing pipe 11 installed in the oxidation reaction tank 8. A second mixing mixer 12 is installed at one end of the oxidation reaction tank 8. An oxidant dosing pipe 30 is installed at the upper end of the oxidation reaction tank 8. A neutralization tank 13 is installed at the rear end of the oxidation reaction tank 8. A calcium hydroxide dosing pipe 14 is installed at the upper end of the neutralization tank 13. A third mixing mixer 15 is installed in the middle of the neutralization tank 13. A coagulation tank 17 is installed at the rear end of the neutralization tank 13. A flocculant dosing pipe 18 is installed at the upper end of the coagulation tank 17. A flocculation reaction mixer 19 is installed at the upper end of the coagulation tank 17. The tank cover 3 is threadedly connected to the pH adjustment tank 1, and the stirring shaft blade 6 forms a rotating structure with the tank cover 3 through the bearing hole 5. The upper partition plate 10 is engaged with the pH adjustment tank 1 through the slot 9, and the slot 9 is... The pH adjustment tank 1 is symmetrically arranged along its central axis. The lower baffle 16 is connected to the oxidation reaction tank 8 via a slot 9, and the upper end of the lower baffle 16 is open. Wastewater collected from the drainage tank is continuously pumped into the inlet pipe 2. Sulfuric acid or hydrochloric acid is added through the acid dosing pipe 4. Under the stirring of the first mixing mixer 7 and the stirring shaft blades 6, the pH of the wastewater is lowered to three to five, and then it enters the oxidation reaction tank 8 from the lower end of the upper baffle 10. Catalyst and oxidant H2O2 are added through the catalyst dosing pipe 11 and oxidant dosing pipe 30, respectively. In an acidic environment, H2O2 reacts with Fe2+ in the catalyst to generate highly oxidizing hydroxyl radicals (…). The oxidizing power of free radicals such as ·OH and superoxide radicals (·O2-) is much stronger than that of conventional water treatment oxidants such as potassium permanganate and sodium hypochlorite. It can directly oxidize and remove 2-methylisoborneol from water. The Fe3+ generated by the reaction of Fe2+ in the catalyst can also act as a coagulant to react with suspended solids in the water. In the neutralization tank 13, calcium hydroxide is added through the calcium hydroxide dosing pipe 14 to neutralize and raise the pH of the water to neutral, and also increase the concentration of calcium ions in the water. By using advanced oxidation technology to oxidize and remove 2-methylisoborneol from the production wastewater, the direct reuse of the wastewater is avoided and the impact on water quality is prevented, thereby improving the efficiency of the device in removing 2-methylisoborneol.

[0023] Please see Figures 1-4A wastewater recycling device for a water treatment plant includes an inlet zone 20 at the rear end of a coagulation tank 17, a sedimentation tank 21 at the rear end of the inlet zone 20, a sludge collection hopper 22 at the lower end of the sedimentation tank 21, a sludge thickening zone 23 at the lower end of the sludge collection hopper 22, a sludge discharge pipe 24 at the side end of the sludge collection hopper 22, a sludge scraper 25 at the upper end of the sedimentation tank 21, a sludge scraper frame 26 at the lower end of the sludge scraper 25, a sludge driving plate 31 at the lower end of the sludge scraper frame 26, a sedimentation inclined tube 27 in the middle of the sedimentation tank 21, an effluent collection trough 28 at the upper end of the sedimentation inclined tube 27, an effluent collection pipe 29 at the side end of the effluent collection trough 28, and a sludge scraper frame 26 forming a rotating structure with the sludge scraper 25 and the sludge collection hopper 22, with the lower surface of the sludge scraper frame 26 in close contact with the inner surface of the sludge collection hopper 22. The sludge driving plate 31... The sludge scraper 25 and the sludge thickening zone 23 form a rotating structure. The sedimentation inclined tube 27 is engaged with the sedimentation tank 21. The sludge settles and thickens through the sedimentation inclined tube 27 and is concentrated in the sludge thickening zone 23. Then, the sludge scraper 25 drives the scraper frame 26 to rotate and scrape the sludge to the sludge collection hopper 22. The sludge is periodically discharged from the sludge discharge pipe 24 through the sludge drive plate 31 to the sludge treatment system of the water supply plant for dewatering. The clean water is collected through the effluent collection tank 28 and flows to the upper end of the sedimentation tank 21. At this time, the turbidity of the clean water is stable below 3 NTU, and most of the 2-methylisoborneol is also removed. The water is then connected to the filter tank of the water supply plant through the effluent pipe 29 for further filtration and disinfection before use. This method can efficiently treat and recycle the production wastewater of the water supply plant, which not only solves the environmental problems caused by direct discharge, but also makes full use of water resources and improves the environmental protection effect of the device.

[0024] Working principle: During operation, the production wastewater collected from the drainage pond is first continuously pumped into the inlet pipe 2. Sulfuric acid or hydrochloric acid is added through the acid dosing pipe 4. Under the stirring of the first mixing mixer 7 and the stirring shaft blades 6, the pH of the wastewater is reduced to three to five, and then it enters the oxidation reaction tank 8 from the lower end of the upper baffle 10. The catalyst and oxidant H2O2 are added through the catalyst dosing pipe 11 and the oxidant dosing pipe 30, respectively. In an acidic environment, H2O2 reacts with Fe2+ in the catalyst to generate highly oxidizing hydroxyl radicals (·OH) and superoxide radicals (·OH). O2- and other free radicals have a much stronger oxidizing power than conventional water treatment oxidants such as potassium permanganate and sodium hypochlorite. They can directly oxidize and remove 2-methylisoborneol from water. The Fe3+ generated from the reaction of Fe2+ in the catalyst can also act as a coagulant to react with suspended solids in the water. In the neutralization tank 13, calcium hydroxide is added through the calcium hydroxide dosing pipe 14 to neutralize and raise the pH of the water to neutral, and also increase the concentration of calcium ions in the water. By using advanced oxidation technology to oxidize and remove 2-methylisoborneol from the production wastewater, the negative impact on water quality caused by direct reuse is avoided. To improve the efficiency of the device in removing 2-methylisoborneol, flocculant PAM is added through the flocculant dosing pipe 18 in the coagulation tank 17. Under the stirring of the flocculation reaction mixer 19, it reacts with the suspended solids in the water to form coarse and dense granular flocs, which enter the sedimentation tank 21 through the inlet zone 20. The flocs are then settled and concentrated in the sludge concentration zone 23 through the sedimentation inclined tube 27. The sludge is then scraped to the sludge collection hopper 22 by the sludge scraper 25 driving the scraper frame 26 to rotate. The sludge is periodically discharged from the sludge discharge pipe 24 through the sludge drive plate 31 to the sludge treatment system of the water supply plant for dewatering treatment. The clean water is discharged through the effluent. The water collected in the collection tank 28 flows to the top of the sedimentation tank 21. At this point, the turbidity of the clear water is stable below 3 NTU, and most of the 2-methylisoborneol is also removed. The water is then connected to the filter tank of the water supply plant through the outlet pipe 29 for further filtration and disinfection before it can be used. This method efficiently treats and recycles the production wastewater of the water supply plant, which not only solves the environmental problems caused by direct discharge, but also makes full use of water resources and improves the environmental protection effect of the device. This completes the use of the device. The contents not described in detail in this manual are existing technologies known to those skilled in the art.

[0025] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for the resource recovery and reuse of industrial wastewater from a water treatment plant, comprising a pH adjustment tank (1), characterized in that: A water inlet pipe (2) is installed on the side of the pH adjustment tank (1). A tank cover (3) is installed on the upper end of the pH adjustment tank (1). An acid dosing pipe (4) is opened on the upper end of the tank cover (3). A rotating hole (5) is opened in the middle of the tank cover (3). A stirring shaft (6) is installed in the middle of the rotating hole (5). A first mixing mixer (7) is installed on the upper end of the stirring shaft (6). A slot (9) is opened in the inner end of the pH adjustment tank (1). An upper baffle (10) is installed in the inner end of the slot (9). An oxidation reaction tank (8) is installed at the rear end of the pH adjustment tank (1). A lower baffle (16) is installed in the inner end of the oxidation reaction tank (8). A catalyst dosing pipe (11) is installed at the upper end of the reaction tank (8), a second mixing mixer (12) is installed in the middle of the oxidation reaction tank (8), an oxidant dosing pipe (30) is installed at the upper end of the oxidation reaction tank (8), a neutralization tank (13) is installed at the rear end of the oxidation reaction tank (8), a calcium hydroxide dosing pipe (14) is installed at the upper end of the neutralization tank (13), a third mixing mixer (15) is installed in the middle of the neutralization tank (13), a coagulation tank (17) is installed at the rear end of the neutralization tank (13), a flocculant dosing pipe (18) is installed at the upper end of the coagulation tank (17), and a flocculation reaction mixer (19) is installed at the upper end of the coagulation tank (17). The coagulation tank (17) is equipped with an inlet area (20) at its rear end. The inlet area (20) is equipped with a sedimentation tank (21) at its rear end. The sedimentation tank (21) is equipped with a sludge collection hopper (22) at its lower end. The sludge collection hopper (22) is equipped with a sludge thickening area (23) at its lower end. The sludge collection hopper (22) is equipped with a sludge discharge pipe (24) at its side end. The sedimentation tank (21) is equipped with a sludge scraper (25) at its upper end. The sludge scraper (25) is equipped with a sludge scraper frame (26) at its lower end. The sludge scraper frame (26) is equipped with a sludge driving plate (31) at its lower end. The sedimentation tank (21) is equipped with a sedimentation inclined tube (27) at its middle end. The sedimentation inclined tube (27) is equipped with an outlet water collection trough (28) at its upper end. The outlet water collection trough (28) is equipped with an outlet pipe (29) at its side end.

2. The device for resource recovery and reuse of industrial wastewater from a water supply plant according to claim 1, characterized in that: The sealing cover (3) is threadedly connected to the pH adjustment tank (1), and the stirring shaft blade (6) forms a rotating structure with the sealing cover (3) through the bearing hole (5).

3. The device for resource recovery and reuse of industrial wastewater from a water supply plant according to claim 1, characterized in that: The upper partition (10) is engaged with the pH adjustment tank (1) through a slot (9), and the slot (9) is symmetrically arranged with respect to the central axis of the pH adjustment tank (1).

4. The device for resource recovery and reuse of wastewater from a water treatment plant according to claim 1, characterized in that: The lower partition (16) is engaged with the oxidation reaction tank (8) through a slot (9), and the upper end of the lower partition (16) is open.

5. A device for resource recovery and reuse of industrial wastewater from a water treatment plant according to claim 1, characterized in that: The scraper frame (26) forms a rotating structure with the scraper (25) and the mud collection hopper (22), and the lower end surface of the scraper frame (26) is in close contact with the inner end surface of the mud collection hopper (22).

6. The device for resource recovery and reuse of wastewater from a water treatment plant according to claim 1, characterized in that: The sludge-driving plate (31) forms a rotating structure with the sludge thickening zone (23) via the sludge scraper (25), and the sedimentation inclined tube (27) is engaged with the sedimentation tank (21).

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