Combined wastewater pretreatment adjusting device

Abstract

The utility model belongs to the technical field of water pollution treatment, and discloses a combined wastewater pretreatment adjusting device. Comprising a primary precipitation facility, a sludge removal pump room, a scum collection facility and a secondary precipitation and water quality and water quantity regulation facility, an effluent collecting tank and a scum collecting hopper are arranged at the top of the primary precipitation facility, and a first sludge hopper is arranged at the bottom of the primary precipitation facility; the scum collecting facility is connected with the scum collecting hopper through a fifth pipeline; an inlet water distribution system of the secondary precipitation and water quality and water quantity adjusting facility is connected with an outlet water collecting tank of the primary precipitation facility through a pipeline; according to the utility model, the removal of suspended matters, floating oil and scum in wastewater and the regulation of water quantity and water quality are realized, and the problem that sludge conveying system equipment and pipelines are easy to block is solved.

Description

Technical Field

[0001] This utility model belongs to the field of water pollution control technology, specifically a combined wastewater pretreatment and regulation device. Background Technology

[0002] Coal mining and other industrial processes generate wastewater characterized by high suspended solids (SS up to 2000 mg / L), high scum and oil content, and significant fluctuations in water quality and quantity. Research on this type of wastewater treatment shows that without pretreatment, subsequent wastewater treatment systems suffer from high scum content, sludge discharge systems are prone to clogging or even failure, effluent quality is poor, the entire wastewater treatment system is highly unstable, and maintenance costs are high. Therefore, pretreatment is necessary to reduce the load on subsequent treatment processes and ensure system effectiveness. Furthermore, the significant fluctuations in water quality and quantity necessitate the installation of water flow regulation facilities to ensure stable system operation. Utility Model Content

[0003] This invention overcomes the shortcomings of the prior art by proposing a combined wastewater pretreatment and regulation device to remove suspended solids, floating oil, and scum from wastewater and to regulate the quantity and quality of water, thus solving the problem of easy blockage in sludge conveying system equipment and pipelines.

[0004] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0005] A combined wastewater pretreatment and regulation device includes a primary sedimentation facility, a sludge discharge pump station, a scum collection facility, a secondary sedimentation facility, and a water quality and quantity regulation facility; the primary sedimentation facility is equipped with an effluent collection tank and a scum collection hopper at the top, a first sludge hopper at the bottom, and a central drive bottom sludge scraper and surface scum scraper at the central axis of the primary sedimentation facility.

[0006] The scum collection facility includes a scum mixing facility; the scum collection facility is connected to the scum collection hopper via a fifth pipeline; the secondary sedimentation and water quality and quantity adjustment facility includes a second sludge hopper, a sludge scraping system, a sewage lift pump, and an inlet water distribution system; the inlet water distribution system of the secondary sedimentation and water quality and quantity adjustment facility is connected to the effluent collection tank of the primary sedimentation facility via a seventh pipeline;

[0007] The sludge discharge pump station includes a first sludge pump and a second sludge pump; the first sludge pump is connected to the first sludge hopper of the primary sedimentation facility through a second pipeline; the second sludge pump is connected to the second sludge hopper of the secondary sedimentation and water quality and quantity adjustment facility through a third pipeline; the first sludge pump and the second sludge pump respectively discharge sludge to the sludge treatment system through a fourth pipeline.

[0008] Furthermore, an outlet weir plate is installed in the outlet collection tank, and a scum baffle is installed on one side of the scum collection hopper.

[0009] Furthermore, the central drive sludge and slag scraping device includes a central drive electric device installed at the top. The drive shaft of the central drive electric device is fixedly connected to a rotating shaft, which extends to the bottom of the primary sedimentation facility. A slag scraper is connected to the top of the rotating shaft, and a sludge scraper is connected to the bottom of the rotating shaft.

[0010] Furthermore, the primary sedimentation facility is connected to the wastewater discharge facility via a first pipeline, which is equipped with a flow metering device and a chemical mixing device.

[0011] Furthermore, the secondary sedimentation and water quality and quantity regulation facilities also include liquid level monitoring facilities, gates, and overflow facilities.

[0012] Furthermore, the seventh pipeline is equipped with an electrically controlled valve.

[0013] Furthermore, the wastewater lift pump of the secondary sedimentation and water quality and quantity adjustment facility lifts the wastewater to the subsequent treatment system;

[0014] Furthermore, the second, third, and fourth pipelines are all equipped with pipeline flushing systems.

[0015] Furthermore, the primary sedimentation facility is equipped with sludge level monitoring facilities.

[0016] Furthermore, the primary sedimentation facility has a square layout and a slope at the bottom.

[0017] The beneficial effects of this utility model compared to the prior art are as follows:

[0018] 1. This utility model utilizes a primary sedimentation facility to remove suspended solids, floating oil, and scum from wastewater, as well as to thicken sludge, reducing the load on subsequent treatment systems and ensuring the stable operation of the wastewater treatment system. The primary sedimentation facility adopts a square layout, which facilitates combination with subsequent facilities, and the top can be covered with an insulated building and heating facilities for use in cold seasons.

[0019] 2. This utility model utilizes a two-stage sedimentation and water volume regulation facility to further remove suspended solids and regulate water quality and quantity in wastewater, ensuring the stable operation of subsequent wastewater treatment systems. The top of the two-stage sedimentation and water volume regulation facility can be covered with a plant building and insulated heating facilities, and subsequent water treatment facilities can be arranged, improving space utilization efficiency.

[0020] 3. This utility model's sludge removal and scum collection facility effectively removes sludge from primary and secondary sedimentation facilities. The adoption of a backwashing system for equipment and pipelines reduces the failure rate of the sludge removal system and improves its operational stability. Simultaneously, a scum and oil collection system is installed to minimize its impact on the quality of the effluent.

[0021] 4. This utility model adopts a highly integrated layout, which improves space utilization efficiency and reduces the floor area. It is particularly suitable for projects with limited usable land area and poor wastewater quality. It has good prospects for promotion and application and can lay the foundation for achieving wastewater effluent quality standards and stable system operation.

[0022] In summary, this invention combines wastewater pretreatment, water quantity and quality regulation, and sludge discharge systems, enabling the removal of suspended solids, floating oil, and scum from wastewater, as well as the regulation of water quantity and quality. The use of mechanical sludge scraping equipment, dry sludge discharge equipment, and flushing facilities solves the problem of easy clogging in sludge conveying systems and pipelines. The secondary sedimentation facility is an underground or semi-underground enclosed structure with mechanical sludge scraping equipment at the bottom, improving the utilization efficiency of the overhead space. This invention offers advantages such as compact layout, small footprint, simple operation and management, and high efficiency and stability. Attached Figure Description

[0023] Figure 1 This is a bottom plan view of the combined wastewater pretreatment and adjustment device proposed in this utility model;

[0024] Figure 2 for Figure 1 Sectional view of AA in the middle;

[0025] Figure 3 for Figure 1 Cross-sectional view of the middle section (BB).

[0026] In the picture:

[0027] 1. Primary sedimentation facility; 2. Sludge removal pump station; 3. Scum collection facility; 4. Secondary sedimentation and water quality and quantity adjustment facility; 5. Center-driven bottom sludge scraper and surface scum scraper; 6. Scum baffle; 7. Scum collection hopper; 8. First sludge hopper; 9. Effluent collection trough; 10. Effluent weir; 11. Sludge level monitoring facility; 12. Center-driven electric equipment; 13. Sludge scraper; 14. Scum scraper; 15. Flow metering device; 16. Chemical mixing device; 17. Sludge pump A; 18. Sludge pump B; 19. Upper enclosure system; 20. Second sludge hopper; 21. Pipeline flushing system; 22. Scum mixing equipment; 23. Sludge scraping system; 24. Sewage lift pump; 25. Liquid level monitoring equipment; 26. Gate; 27. Overflow equipment; 28. Inlet water distribution system; 29. ​​Electric control valve; 31. First pipeline; 32. Second pipeline; 33. Third pipeline; 34. Fourth pipeline; 35. Fifth pipeline; 36. Sixth pipeline; 37. Seventh pipeline. Detailed Implementation

[0028] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, this utility model will be further described in detail with reference to the embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of this utility model and are not intended to limit it. The technical solution of this utility model will be described in detail below with reference to the embodiments and accompanying drawings, but the scope of protection is not limited thereto.

[0029] See Figures 1 to 3 This embodiment proposes a combined wastewater pretreatment and regulation device, including a primary sedimentation facility 1, a sludge removal pump station 2, a scum collection facility 3, and a secondary sedimentation and water quality and quantity regulation facility 4.

[0030] The primary sedimentation facility 1 adopts a square layout for easy integrated arrangement. The primary sedimentation facility 1 has two main purposes: primary sedimentation of suspended solids in wastewater and removal of scum and oil from the wastewater, reducing the load on subsequent wastewater treatment facilities. A centrally driven bottom scraper and surface scraper 5 is installed at the central axis of the primary sedimentation facility 1; an effluent collection tank 9 and a scum collection hopper 7 are installed on one side of the top of the primary sedimentation facility 1, with an effluent weir plate 10 inside the effluent collection tank 9 and a scum baffle 6 on one side of the scum collection hopper 7; a first sludge hopper 8 is installed at the bottom of the primary sedimentation facility 1, and a sludge level monitoring device 11 is installed inside the primary sedimentation facility 1; the centrally driven scraper and scum scraper 5 includes a centrally driven electric device 12 installed at the top, with a drive shaft fixedly connected to a rotating shaft extending to the bottom of the primary sedimentation facility 1, a scraper plate 14 connected to the top of the rotating shaft, and a scraper plate 13 connected to the bottom of the rotating shaft.

[0031] The primary sedimentation facility 1 is connected to the wastewater discharge via the first pipeline 31, which is equipped with a flow metering device 15. A dosing and mixing device 16 is connected to the first pipeline 31 for adding PAC and PAM.

[0032] The scum collection facility 3 includes a scum stirring facility 22; the scum collection facility 3 is connected to the scum collection hopper 7 via a fifth pipeline 35.

[0033] The secondary sedimentation and water quality and quantity regulation facility 4 includes a second sludge hopper 20, a sludge scraping system 23, a wastewater lift pump 24, a liquid level monitoring facility 25, a gate 26, an overflow facility 27, and an inlet water distribution system 28. The inlet water distribution system 28 of the secondary sedimentation and water quality and quantity regulation facility 4 is connected to the effluent collection tank 9 of the primary sedimentation facility 1 through a sixth pipeline 36 and a seventh pipeline 37. An electrically controlled valve 29 is installed on the seventh pipeline 37 to realize the water quantity regulation function of the primary sedimentation facility 1. The wastewater lift pump 24 of the secondary sedimentation and water quality and quantity regulation facility 4 lifts the wastewater to the subsequent treatment system. The secondary sedimentation and water quality and quantity regulation facility 4 is equipped with a sludge scraping system 23 at the bottom to collect sludge into the second sludge hopper 20, and discharge the sludge to the subsequent sludge treatment system through a third pipeline 33 and a second sludge pump 18.

[0034] The sludge discharge pump station 2 includes a first sludge pump 17 and a second sludge pump 18. The first sludge pump 17 is connected to the first sludge hopper 8 of the primary sedimentation facility 1 via a second pipeline 32; the second sludge pump 18 is connected to the second sludge hopper 20 of the secondary sedimentation and water quality and quantity adjustment facility 4 via a third pipeline 33, and discharges the sludge to the sludge treatment system via a fourth pipeline 34; the second pipeline 32, the third pipeline 33, and the fourth pipeline 34 are all equipped with a pipeline flushing system 21.

[0035] The setting parameters and specific implementation process of each component in this embodiment are as follows:

[0036] (a) Primary sedimentation facilities

[0037] a. Primary sedimentation facility 1 is set up according to the maximum influent flow rate of the system, with a surface loading range of 3.6-4.5m. 3 / m 2 The .h. structure is arranged in a square shape with a sloped bottom to facilitate the collection and removal of sludge.

[0038] b. The center-driven bottom sludge scraping and surface sludge scraping equipment 5 is equipped with a supporting center-driven electric device 12 and a steel-framed working bridge for easy maintenance. A sludge level monitoring facility 11 is installed to control the timely discharge of sludge from the sludge pump.

[0039] A connecting pipe can be installed at the sludge level of the primary sedimentation facility 1, 0.5m above the sludge surface, to connect it to the secondary sedimentation and water flow regulation facility 4. The primary sedimentation structure's sedimentation treatment and some water flow regulation functions can be freely switched by controlling the opening and closing of the electric or pneumatic valves on the connecting pipe. The underwater components of the centrally driven bottom sludge scraper 13 and sludge scraper 14, the scum baffle 6, and the effluent weir 10 of the bottom sludge scraper and surface sludge scraper 5 should all be made of SS304 material.

[0040] c. The angle of the bottom sludge hopper should be no less than 55 degrees. The four corners of the square primary sedimentation facility should be filled to ensure that the settled sludge can slide to the bottom for discharge.

[0041] d. The load of the triangular outlet weir plate should not exceed 1.7 L / s·m, and the width of the outlet trough should not be less than 300 mm.

[0042] (ii) Sludge removal pump room

[0043] a. The first sludge pump 17 and the second sludge pump 18 should preferably be dry slurry pumps, and sludge screw pumps can be used. The flow rate and pressure should meet the sludge discharge requirements.

[0044] b. The diameter of the sludge pump suction pipe in the secondary sedimentation facility should not be less than 200mm. Each sludge hopper should preferably be equipped with one suction pipe and a corresponding discharge pump; the discharge pump should preferably have a backup pump. The primary sedimentation system should preferably have two discharge pipes with a diameter not less than 200mm; this can be reduced to one pipe if a backwashing system is installed. The sludge pressure piping system should have a diameter not less than 150mm. The sludge pump and piping system should be equipped with a high-pressure water flushing system to prevent pipe blockage.

[0045] (iii) Scum Collection Facilities

[0046] Scum collection facility 3 should be equipped with a stirring device to prevent settling. The stirring device can be a perforated pipe air agitator or a mechanical agitator. The mechanical agitator power should be no less than 8W / m. 3 .

[0047] (iv) Secondary sedimentation and water volume regulation facility 4 adopts a horizontal flow sedimentation tank, equipped with an inlet water distribution system, sludge hopper, built-in sludge scraping system, liquid level metering system, sewage lift pump, and manual gate. Specific implementation is as follows:

[0048] a. Two sets of secondary sedimentation and water volume regulation facilities 4 are adopted. The effective water volume regulation time of the horizontal flow secondary sedimentation and water volume regulation structure should be determined by calculation based on the drainage system, hourly drainage volume and surface wastewater treatment facilities. In the absence of a clear drainage system and hourly drainage volume, the effective regulation volume is determined according to the design average hourly water volume that can be stored for 6-8 hours.

[0049] b. To improve the sedimentation effect, the length-to-width ratio should be 4:1 and the length-to-depth ratio should be 16:1.

[0050] c. Secondary sedimentation and water volume regulation facilities: Each group at the bottom should be equipped with at least one sludge hopper and one set of built-in sludge scraping system. The bottom of the sludge hopper should preferably be square, and the angle of the hopper should not be less than 55 degrees. The underwater part of the built-in sludge scraping system should be made of SS304 stainless steel, and the above-water part should preferably be installed indoors. If installed outdoors, rainproof and winter antifreeze measures should be provided. The built-in sludge scraping system should be automatically operated, using interval operation, and the interval between each operation should not exceed 30 minutes.

[0051] d. Secondary sedimentation and water flow regulation facilities: A water distribution system should be installed at the inlet end to improve water distribution and sedimentation effects. The flow velocity at the water distribution hole should not exceed 0.3 m / s. A built-in sludge scraper system and necessary installation and lifting holes should be provided at the top; lifting holes should be provided at the pump installation location, with dimensions suitable for pump lifting and maintenance.

[0052] e. Wastewater lift pumps should be configured according to the average hourly treatment capacity of wastewater and take into account a certain variation coefficient. At least one backup pump should be provided, and a liquid level metering device should be installed for automated control of pump start-up and shutdown based on the liquid level.

[0053] f. The top of the secondary sedimentation and water volume regulation facility 4 can be used to install subsequent wastewater treatment facilities. The top setting should take into account the load requirements of the equipment above.

[0054] The contents not described in detail in this specification are existing technologies known to those skilled in the art. The mechanical equipment and standard parts used in this embodiment can all be purchased from the market, and the circuit connections adopt conventional connection methods in the prior art, which will not be described in detail here.

[0055] This embodiment can remove suspended solids, floating oil, and scum from wastewater, and regulate water quantity and quality. The secondary sedimentation facility is an underground or semi-underground enclosed structure, equipped with mechanical sludge and scum scraping equipment at the bottom. This arrangement improves the utilization efficiency of the overhead space. The dry sludge discharge equipment is equipped with flushing facilities, solving the problem of easy clogging of sludge conveying system equipment and pipelines. This combined treatment facility has the advantages of compact layout, small footprint, simple operation and management, and high efficiency and stability.

[0056] The above description is a further detailed explanation of the present invention in conjunction with specific preferred embodiments. It should not be considered that the specific embodiments of the present invention are limited to this. For those skilled in the art, several simple deductions or substitutions can be made without departing from the present invention, and all such deductions or substitutions should be considered to fall within the scope of patent protection determined by the submitted claims.

Claims

1. A combined wastewater pretreatment and conditioning device, characterized in that, It includes a primary sedimentation facility (1), a sludge discharge pump station (2), a scum collection facility (3), a secondary sedimentation and water quality and quantity adjustment facility (4); the primary sedimentation facility (1) is equipped with an effluent collection tank (9) and a scum collection hopper (7) at the top, a first sludge hopper (8) at the bottom, and a central drive bottom sludge scraping and water surface scum scraping device (5) at the central axis of the primary sedimentation facility (1); The scum collection facility (3) includes a scum stirring facility (22); the scum collection facility (3) is connected to the scum collection hopper (7) through a fifth pipeline (35); the secondary sedimentation and water quality and quantity adjustment facility (4) includes a second sludge hopper (20), a sludge scraping system (23), a sewage lifting pump (24), and an inlet water distribution system (28); the inlet water distribution system (28) of the secondary sedimentation and water quality and quantity adjustment facility (4) is connected to the effluent collection tank (9) of the primary sedimentation facility (1) through a seventh pipeline (37); The sludge discharge pump station (2) includes a first sludge pump (17) and a second sludge pump (18). The first sludge pump (17) is connected to the first sludge hopper (8) of the primary sedimentation facility (1) through a second pipeline (32). The second sludge pump (18) is connected to the second sludge hopper (20) of the secondary sedimentation and water quality and quantity adjustment facility (4) through a third pipeline (33). The first sludge pump (17) and the second sludge pump (18) respectively discharge sludge to the sludge treatment system through a fourth pipeline (34).

2. The combined wastewater pretreatment and regulating device according to claim 1, characterized in that, An outlet weir plate (10) is installed in the outlet collection tank (9), and a scum baffle plate (6) is installed on one side of the scum collection hopper (7).

3. The combined wastewater pretreatment and regulating device according to claim 1, characterized in that, The central drive sludge scraping and slag scraping equipment (5) includes a central drive electric device (12) set at the top. The drive shaft of the central drive electric device (12) is fixedly connected to a rotating shaft. The rotating shaft is connected to the bottom of the primary sedimentation facility (1). A slag scraper (14) is connected to the top of the rotating shaft, and a sludge scraper (13) is connected to the bottom of the rotating shaft.

4. The combined wastewater pretreatment and regulating device according to claim 1, characterized in that, The primary sedimentation facility (1) is connected to the wastewater discharge facility through the first pipeline (31), and the first pipeline (31) is equipped with a flow metering device (15); a dosing and mixing device (16) is connected to the first pipeline (31).

5. The combined wastewater pretreatment and regulating device according to claim 1, characterized in that, The secondary sedimentation and water quality and quantity regulation facility (4) also includes a liquid level monitoring facility (25), a gate (26) and an overflow facility (27).

6. The combined wastewater pretreatment and regulating device according to claim 1, characterized in that, The seventh pipeline (37) is equipped with an electrically controlled valve (29).

7. The combined wastewater pretreatment and conditioning device according to claim 1, characterized in that, The wastewater lift pump (24) of the secondary sedimentation and water quality and quantity adjustment facility (4) lifts the wastewater to the subsequent treatment system.

8. The combined wastewater pretreatment and regulating device according to claim 1, characterized in that, The second pipeline (32), the third pipeline (33), and the fourth pipeline (34) are all equipped with a pipeline flushing system (21).

9. A combined wastewater pretreatment and regulating device according to claim 1, characterized in that, The primary sedimentation facility (1) is equipped with a sludge level monitoring facility (11).

10. A combined wastewater pretreatment and conditioning device according to claim 1, characterized in that, The primary sedimentation facility (1) has a square layout and a slope at the bottom.

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