High efficiency softening flocculator filter

Abstract

The utility model relates to the technical field of water treatment especially relates to a high -efficient softening flocculation filter, including fluidized bed jar body, fluidized bed jar body includes the lower cone, flocculation cylinder and upper end cover connected in proper order from below to top, and the lower cone is equipped with the sludge pipe, and the flocculation cylinder is equipped with flocculating agent inlet pipe and water inlet pipe, and the upper end cover is equipped with the water outlet pipe, fluidized bed jar body sets up sludge concentration area, mixed suspension area, filter separation area and catchment area from below to top, and the lower cone corresponds sludge concentration area, and the flocculation cylinder corresponds mixed suspension area and filter separation area, and the upper end head corresponds catchment area, filter separation area is located in the upper portion of mixed suspension area, and is equipped with water inlet grating between filter separation area and mixed suspension area, and mixed suspension area is used for flocculation agglomeration of suspended solids in the sludge water mixture. The utility model is applicable to fracturing flowback fluid and other various wastewater treatment with high suspended solids concentration, and solves the problem of low treatment efficiency and high cost of prior art.

Description

Technical Field

[0001] This utility model relates to the technical field of water treatment, and in particular to a high-efficiency softening flocculation filter. Background Technology

[0002] Currently, oilfield fracturing flowback fluids contain high concentrations of pollutants such as organic matter, salts, and suspended solids, which can cause serious environmental damage if not properly disposed of. "Flocculation and sedimentation" combined with "crystallization and granulation" is a widely adopted treatment method both domestically and internationally, and water treatment technologies and equipment based on the theory of solid-liquid separation in suspended layers are widely used. However, suspended solids (SS) significantly affect the treatment effect of chemical softening of wastewater. In practical engineering, to achieve the best treatment and crystallization effects of the chemical softening process, the influent SS should be below 50 mg / L. This is because when the influent suspended solids are high, some crystals will crystallize on the suspended solids particles during the subsequent crystallization reaction. These crystals, due to their small size or insufficient strength, will then be discharged from the reactor with the water flow, resulting in high effluent turbidity and reduced crystallization efficiency.

[0003] Existing circulating crystallization softening solid-liquid separation devices typically include a fluidized crystallization zone, a separation zone, and a sludge thickening zone. Although they can effectively reduce the concentration of suspended solids and turbidity in the water in the separation zone, these devices do not have the function of circulating granulation and have a small processing flow rate, resulting in low efficiency.

[0004] Therefore, how to improve flocculation efficiency, develop filters that can effectively treat high influent SS, and save floor space and cost are urgent problems to be solved in this field. Utility Model Content

[0005] This invention addresses the shortcomings of existing technologies by providing a high-efficiency softening and flocculation filter, suitable for situations with high suspended solids concentrations in fracturing flowback fluid, thus solving the problems of low processing efficiency and high cost in existing technologies.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0007] A high-efficiency softening flocculation filter includes a fluidized bed tank, which comprises a lower cone, a flocculation cylinder, and an upper head connected sequentially from bottom to top. The lower cone is equipped with a sludge discharge pipe, the flocculation cylinder is equipped with a flocculant inlet pipe and a water inlet pipe, and the upper head is equipped with a water outlet pipe. The fluidized bed tank is arranged from bottom to top as a sludge thickening zone, a mixing and suspension zone, a filtration and separation zone, and a water collection zone. The lower cone corresponds to the sludge thickening zone, the flocculation cylinder corresponds to the mixing and suspension zone and the filtration and separation zone, and the upper head corresponds to the water collection zone. The filtration and separation zone is located above the mixing and suspension zone, and an inlet grid is provided between the filtration and separation zone and the mixing and suspension zone. The mixing and suspension zone is used to flocculate and agglomerate suspended solids in the sludge-water mixture.

[0008] By adopting the above technical solution, the mud-water mixture enters the mixing and suspension zone of the flocculation cylinder through the inlet pipe, and the flocculant enters the mixing and suspension zone of the flocculation cylinder through the flocculant inlet pipe. The mixing and suspension zone can effectively separate particles of different sizes, which can enhance the formation of floc particles and flocculate and agglomerate the suspended matter in the mud-water mixture. The agglomerated particles and liquid mud-water mixture enter the filtration and separation zone, where small particles and other impurities are removed, and further clean water is obtained. High-density particles fall into the sludge thickening zone under their own gravity, which improves the equipment's processing efficiency and operating effect. The cone-shaped structure of the lower cone increases the bottom flow velocity, allowing small particles to settle smoothly.

[0009] Furthermore, the flocculation cylinder is equipped with a guide tube, and the guide tube is equipped with a stirring device. The water inlet pipe passes through the side wall of the flocculation cylinder and extends into the bottom of the guide tube, and the flocculant inlet pipe passes through the side wall of the flocculation cylinder and extends into the lower part of the guide tube.

[0010] By adopting the above technical solution, the flocculant enters the interior of the guide tube through the flocculant inlet pipe, and the influent water (sewage) enters the interior of the guide tube through the inlet pipe and is transported upward through the guide tube. Under the action of upward flow and mechanical stirring by the stirring device, the flocs agglomerate and form high-density particles.

[0011] Furthermore, the top of the guide tube is provided with a guide plate, and the outside of the guide tube is provided with a baffle tube. The baffle tube is configured to be closed at the top and open at the bottom. The guide plate is used to guide the mixture in the guide tube into the baffle tube.

[0012] By adopting the above technical solution, the inside of the guide tube is the granulation fluidization zone, the area between the baffle and the guide tube is the reflux zone, and the area between the flocculation tube and the baffle and guide tube is the sludge settling zone. Part of the solid-liquid mixture is returned to the granulation fluidization zone, which improves the resistance to hydraulic load impact. After the sewage enters the granulation fluidization zone inside the guide tube through the inlet pipe, it passes through the guide plate and enters the reflux zone between the baffle and the guide tube, which accelerates the particle circulation. The mixed effluent enters the sludge settling zone inside the flocculation tube through the bottom opening of the baffle. Part of it settles after flowing out of the reflux zone, and the other part flows upward with the water flow to the filtration separation zone in the sludge settling zone, realizing settling and reflux.

[0013] Furthermore, the stirring device includes a motor, a stirring shaft, and a stirring impeller. The motor is connected to the fluidized bed tank, the stirring shaft is connected to the output shaft of the motor, and the stirring impeller is connected to the stirring shaft.

[0014] By adopting the above technical solution, the flocculant and the incoming water flow are stirred by the impeller in the guide tube, which promotes the mixing of the incoming water and the flocculant and forms particles.

[0015] Furthermore, the flocculation cylinder, the guide cylinder, the baffle cylinder, and the stirring shaft are arranged coaxially.

[0016] Furthermore, the flocculation cylinder is equipped with a filter partition plate, which is located above the water inlet grid plate, and filter media is provided on the upper part of the filter partition plate.

[0017] By adopting the above technical solution, after the mud-water mixture passes through the mixing and suspension zone, the produced effluent enters the filtration and separation zone, where it is filtered by filter media to further generate purified water.

[0018] Furthermore, the flocculation cylinder is provided with a second manhole, which corresponds to the position of the filter material.

[0019] By adopting the above technical solution, manhole 2 makes it easier for operators to clean the filter media regularly.

[0020] Furthermore, a perforated plate is provided between the filter material and the upper end cap.

[0021] By adopting the above technical solution, the porous plate can block the filter media and prevent the filter media from flowing upward with the purified water.

[0022] Furthermore, the upper end cap is provided with an exhaust port and a hand hole, the flocculation cylinder is provided with a sight glass one and a sight glass two, the sight glass one corresponds to the position of the water inlet pipe, the sight glass two corresponds to the position of the filter partition plate, and the lower cone is provided with a sight glass three and a manhole one.

[0023] By adopting the above technical solutions, the vent is used to discharge waste gas from the fluidized bed tank, ensuring a clean and safe working environment inside the fluidized bed tank; the handhole facilitates cleaning and maintenance of the fluidized bed tank by staff, and can also be used to discharge waste gas from the fluidized bed tank, ensuring a clean and safe working environment inside the fluidized bed tank; sight glass one allows operators to observe the inflow of wastewater, sight glass two allows operators to observe the condition of the filter partition, and sight glass three allows operators to observe the condition of the sludge thickening zone; manhole one allows operators to regularly clean the sludge thickening zone.

[0024] Furthermore, the stirring shaft extends out of the top of the fluidized bed tank and is connected to the motor, and a sealing device is provided between the fluidized bed tank and the stirring shaft.

[0025] By adopting the above technical solution, the sealing device can seal the space between the fluidized bed tank and the stirring shaft.

[0026] In summary, compared with the prior art, the beneficial effects of the above technical solution are:

[0027] (1) In this utility model, the solid-liquid separation device in the mixed suspension zone can effectively separate particles of different sizes, thereby enhancing the formation of flocs; the wastewater in the mixed suspension zone circulates fully in the inner and outer layers of the guide tube, promoting the contact formation of suspended matter in the continuously replenished raw water; the small particles in the influent flocculate and agglomerate in the guide tube, gradually forming high-density particles, ensuring the growth and renewal of particles inside the guide tube; the agglomerated particles and the mud-water mixture of the liquid enter the filtration separation zone, where small particles and other impurities are removed, further resulting in clean effluent; the high-density particles fall into the sludge thickening zone under their own gravity, improving the equipment's processing efficiency and operating effect;

[0028] (2) This utility model achieves circulating granulation by setting a guide tube, a baffle tube and a stirring device, so that small particles circulate in reverse between the flocculation tube and the guide tube in the mixed suspension zone, increasing their volume, and effectively improving the agglomeration efficiency of the flocs by strengthening separation through axial vortex.

[0029] (3) This utility model device can withstand high salinity, high load and large flow rate, and the inlet water upward flow velocity can reach 60-80m / h; the setting of the upward flow and stirring device makes the flocculant and wastewater mix better, and the single motor stirring is used. The system has fewer components, simple operation, small footprint and reduced cost.

[0030] (4) This utility model device can operate continuously and discharge the particles that need to be removed at regular intervals, thus achieving automation. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of a high-efficiency softening flocculation filter according to the present invention;

[0032] Figure 2 This is a schematic diagram of the overall structure of the fluidized bed tank of a high-efficiency softening flocculation filter according to this utility model.

[0033] Explanation of reference numerals in the attached drawings: F1, fluidized bed tank; F11, sludge thickening zone; F12, mixing and suspension zone; F13, filtration and separation zone; F14, water collection zone; 1, motor; 2, sealing device; 3, vent; 4, manhole; 5, outlet pipe; 6, upper end cap; 7, perforated plate; 8, manhole one; 9, filter media; 10, inlet grate; 11, guide plate; 12, fixing plate one; 13, flocculation cylinder; 14. 15. Flow guide tube; 16. Agitator impeller; 17. Flocculant inlet pipe; 18. Water inlet pipe; 19. Sight glass one; 20. Lower cone; 21. Sludge discharge pipe; 22. Support leg; 23. Agitator shaft; 24. Filter partition plate; 25. Sleeve; 26. Manhole two; 27. Baffle tube; 28. Sight glass two; 29. ​​Sight glass three; 20. Fixing plate two; 100. Granulation fluidization zone; 200. Return zone; 300. Sludge settling zone. Detailed Implementation

[0034] The following is in conjunction with the appendix Figure 1-2 The principles and features of this utility model are described, and the examples given are only used to explain this utility model and are not intended to limit the scope of this utility model.

[0035] This utility model discloses a high-efficiency softening flocculation filter.

[0036] Reference Figure 1 and Figure 2 A high-efficiency softening flocculation filter includes a fluidized bed tank F1, which comprises a lower cone 19, a flocculation cylinder 13, and an upper end cap 6 connected sequentially from bottom to top. The fluidized bed tank F1 is provided with a sludge concentration zone F11, a mixing and suspension zone F12, a filtration and separation zone F13, and a water collection zone F14 from bottom to top. The mixing and suspension zone F12 is used to flocculate and agglomerate suspended solids in the sludge-water mixture.

[0037] The lower cone 19 is fixedly equipped with a sludge discharge pipe 20 at its bottom, the flocculation cylinder 13 is fixedly equipped with a flocculant inlet pipe 16 at its lower part, the flocculation cylinder 13 is fixedly equipped with a water inlet pipe 17 at its bottom, and the upper end cap 6 is fixedly equipped with a water outlet pipe 5. The lower cone 19 corresponds to the sludge thickening zone F11, the flocculation cylinder 13 corresponds to the mixed suspension zone F12 and the filtration separation zone F13, and the upper end cap 6 corresponds to the water collection zone F14. The filtration separation zone F13 is located above the mixed suspension zone F12, and a water inlet grid 10 is provided between the filtration separation zone F13 and the mixed suspension zone F12.

[0038] The mud-water mixture enters the mixing and suspension zone F12 of the flocculation cylinder 13 through the inlet pipe 17, and the flocculant enters the mixing and suspension zone F12 of the flocculation cylinder 13 through the flocculant inlet pipe 16. The mixing and suspension zone F12 can effectively separate particles of different sizes, which can enhance the formation of floc particles and flocculate and agglomerate the suspended matter in the mud-water mixture. The agglomerated particles and the mud-water mixture enter the filtration and separation zone F13. After passing through the filtration and separation zone F13, small particles and other impurities are removed, and clean water is obtained. High-density particles fall into the sludge thickening zone F11 under their own gravity, which improves the equipment's processing efficiency and operating effect. The cone-shaped structure of the lower cone 19 increases the bottom flow velocity, allowing small particles to settle smoothly.

[0039] A guide tube 14 is installed inside the flocculation cylinder 13. The upper part and bottom of the guide tube 14 are fixedly connected to the interior of the flocculation cylinder 13 by fixing plate 12 and fixing plate 29, respectively. The water inlet pipe 17 passes through the side wall of the flocculation cylinder 13 and extends into the bottom of the guide tube 14. The flocculant inlet pipe 16 passes through the side wall of the flocculation cylinder 13 and extends into the lower part of the guide tube 14. A stirring device is installed inside the guide tube 14. The flocculant enters the interior of the guide tube 14 through the flocculant inlet pipe 16, and the incoming water (sewage) enters the interior of the guide tube 14 through the water inlet pipe 17 and is conveyed upward through the guide tube 14. Under the action of upward flow and mechanical stirring by the stirring device, the flocs agglomerate and form high-density particles.

[0040] A guide plate 11 is fixedly provided on the top of the guide tube 14, and a baffle tube 26 is fixedly provided on the outside of the guide tube 14. The baffle tube 26 is configured to be closed at the top and open at the bottom. The guide plates 11 are distributed in a circular interval along the guide tube 14. The guide plates 11 are used to guide the mixture in the guide tube 14 to the baffle tube 26.

[0041] Specifically, the positional relationship between the guide plate 11 and the guide cylinder 14 can be as follows: the guide plate 11 is fixed to the inner wall of the guide cylinder 14, and the top ends of the guide plate 11, the guide cylinder 14 and the baffle cylinder 26 are flush. The cylinder wall of the guide cylinder 14 between two adjacent guide plates 11 is cut off to guide the mixture in the guide cylinder 14 to the baffle cylinder 26.

[0042] The guide tube 14 contains the granulation fluidization zone 100, the baffle tube 26 and the guide tube 14 form the reflux zone 200, and the flocculation tube 13 and the baffle tube 26 and guide tube 14 form the sludge settling zone 300. Part of the solid-liquid mixture is returned to the granulation fluidization zone 100, which improves the resistance to hydraulic load impact. After the sewage enters the granulation fluidization zone 100 in the guide tube 14 through the inlet pipe 17, it enters the reflux zone 200 between the baffle tube 26 and the guide tube 14 through the guide plate 11, which accelerates the particle circulation. The mixed effluent enters the sludge settling zone 300 in the flocculation tube 13 through the bottom opening of the baffle tube 26. Part of it settles after flowing out of the reflux zone 200, and the other part flows upward with the water flow in the sludge settling zone 300 to the filtration separation zone F13, realizing settling and reflux.

[0043] The stirring device includes a motor 1, a stirring shaft 22, and a stirring impeller 15. The motor 1 is fixedly connected to the fluidized bed tank F1, the stirring shaft 22 is fixedly connected to the output shaft of the motor 1, and the stirring impeller 15 is fixedly connected to the stirring shaft 22. The flocculation cylinder 13, the guide cylinder 14, the baffle cylinder 26, and the stirring shaft 22 are coaxially arranged. The flocculant and the incoming water flow are stirred by the stirring impeller 15 in the guide cylinder 14, promoting the mixing of the incoming water and the flocculant to form particles.

[0044] The stirring shaft 22 extends out of the top of the fluidized bed tank F1 and is fixedly connected to the motor 1. A sealing device 2 is installed between the fluidized bed tank F1 and the stirring shaft 22. The sealing device 2 is not specifically limited here, but can be used to seal the space between the fluidized bed tank F1 and the stirring shaft 22.

[0045] A filter partition plate 23 is fixedly installed inside the flocculation cylinder 13. The filter partition plate 23 is located above the water inlet grid plate 10, and filter media 9 is provided on the upper part of the filter partition plate 23. After the mud-water mixture passes through the mixing and suspension zone F12, the produced effluent enters the filtration and separation zone F13, where it is filtered by the filter media 9 to further generate purified water.

[0046] A sleeve 24 is provided inside the filter media 9, and the stirring shaft 22 passes through the sleeve 24. A perforated plate 7 is fixed between the filter media 9 and the upper end cap 6. The perforated plate 7 can block the filter media 9 and prevent the filter media 9 from flowing upward with the clean water.

[0047] The flocculation cylinder 13 is provided with a second manhole 25, which corresponds to the position of the filter media 9, making it convenient for the operator to clean the filter media 9 regularly.

[0048] The flocculation cylinder 13 is equipped with a sight glass 18 and a sight glass 27. The sight glass 18 is positioned opposite to the water inlet pipe 17, making it easy for the operator to observe the water intake of the wastewater. The sight glass 27 is positioned opposite to the filter partition plate 23, making it easy for the operator to observe the condition of the filter partition plate 23.

[0049] The upper end cap 6 is provided with an exhaust port 3 and a hand hole 4. The exhaust port 3 is used to discharge the waste gas inside the fluidized bed tank F1 to ensure the cleanliness and safety of the working environment inside the fluidized bed tank F1. The hand hole 4 can facilitate the cleaning and maintenance of the fluidized bed tank F1 by the staff, and can also be used to discharge the waste gas inside the fluidized bed tank F1 to ensure the cleanliness and safety of the working environment inside the fluidized bed tank F1.

[0050] The lower cone 19 is equipped with a sight glass 28 and a manhole 8. The sight glass 28 allows the operator to observe the condition of the sludge thickening zone F11; the manhole 8 allows the operator to clean the sludge thickening zone F11 regularly.

[0051] The lower cone 19 is equipped with a support leg 21 on its side wall. The bottom of the support leg 21 can be detachably fitted with a pulley to facilitate the overall movement of the device.

[0052] The implementation principle of this utility model embodiment of a high-efficiency softening flocculation filter is as follows: A mud-water mixture enters the mixing and suspension zone F12 of the flocculation cylinder 13 through the inlet pipe 17; flocculant enters the interior of the guide cylinder 14 through the flocculant inlet pipe 16; and the incoming water flow (sewage) enters the interior of the guide cylinder 14 through the inlet pipe 17 and is conveyed upwards through the guide cylinder 14. Under the action of upward flow and mechanical stirring by the stirring device, the flocs agglomerate, forming high-density particles; simultaneously, a portion of the solid-liquid mixture is returned to the granulation fluidization zone 100, improving... It enhances the resistance to hydraulic load impact; after the sewage enters the guide tube 14 through the inlet pipe 17, it passes through the guide plate 11 and enters the baffle tube 26 to accelerate particle circulation. The mixed effluent enters the flocculation tube 13 to achieve sedimentation and reflux. Then, the agglomerated particles and the mud-water mixture enter the filtration separation zone F13. After passing through the inlet grid plate 10, the filter partition plate 23, the filter media 9 and the porous plate 7, small particles and other impurities are removed, and further clean effluent is obtained. The high-density particles fall into the sludge thickening zone F11 under their own gravity.

[0053] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-efficiency softening flocculation filter, characterized in that: The fluidized bed tank (F1) includes a lower cone (19), a flocculation cylinder (13), and an upper head (6) connected sequentially from bottom to top. The lower cone (19) is equipped with a sludge discharge pipe (20), the flocculation cylinder (13) is equipped with a flocculant inlet pipe (16) and a water inlet pipe (17), and the upper head (6) is equipped with a water outlet pipe (5). The fluidized bed tank (F1) is provided with a sludge thickening zone (F11), a mixing and suspension zone (F12), a filtration and separation zone (F13), and a water collection zone from bottom to top. The lower cone (19) corresponds to the sludge thickening zone (F11), the flocculation cylinder (13) corresponds to the mixed suspension zone (F12) and the filtration separation zone (F13), and the upper end cap (6) corresponds to the water collection zone (F14). The filtration separation zone (F13) is located above the mixed suspension zone (F12). An inlet grid plate (10) is provided between the filtration separation zone (F13) and the mixed suspension zone (F12). The mixed suspension zone (F12) is used to flocculate and agglomerate suspended solids in the sludge-water mixture.

2. The high-efficiency softening flocculation filter according to claim 1, characterized in that: The flocculation cylinder (13) is provided with a guide cylinder (14), and the guide cylinder (14) is provided with a stirring device. The water inlet pipe (17) passes through the side wall of the flocculation cylinder (13) and extends into the bottom of the guide cylinder (14). The flocculant inlet pipe (16) passes through the side wall of the flocculation cylinder (13) and extends into the lower part of the guide cylinder (14).

3. The high-efficiency softening flocculation filter according to claim 2, characterized in that: The top of the guide tube (14) is provided with a guide plate (11), and the outside of the guide tube (14) is provided with a baffle tube (26). The baffle tube (26) is configured to be closed at the top and open at the bottom. The guide plate (11) is used to guide the mixture in the guide tube (14) into the baffle tube (26).

4. The high-efficiency softening flocculation filter according to claim 3, characterized in that: The stirring device includes a motor (1), a stirring shaft (22) and a stirring impeller (15). The motor (1) is connected to the fluidized bed tank (F1), the stirring shaft (22) is connected to the output shaft of the motor (1), and the stirring impeller (15) is connected to the stirring shaft (22).

5. The high-efficiency softening flocculation filter according to claim 4, characterized in that: The flocculation cylinder (13), the guide cylinder (14), the baffle cylinder (26), and the stirring shaft (22) are arranged coaxially.

6. The high-efficiency softening flocculation filter according to claim 1, characterized in that: The flocculation cylinder (13) is provided with a filter partition plate (23), which is located above the water inlet grid plate (10), and the filter partition plate (23) is provided with filter media (9) on its upper part.

7. A high-efficiency softening flocculation filter according to claim 6, characterized in that: The flocculation cylinder (13) is provided with a second manhole (25), which corresponds to the position of the filter material (9).

8. A high-efficiency softening flocculation filter according to claim 6, characterized in that: A perforated plate (7) is provided between the filter media (9) and the upper end cap (6).

9. A high-efficiency softening flocculation filter according to claim 6, characterized in that: The upper end cap (6) is provided with an exhaust hole (3) and a hand hole (4). The flocculation cylinder (13) is provided with a sight glass one (18) and a sight glass two (27). The sight glass one (18) is positioned opposite to the water inlet pipe (17). The sight glass two (27) is positioned opposite to the filter partition plate (23). The lower cone (19) is provided with a sight glass three (28) and a manhole one (8).

10. A high-efficiency softening flocculation filter according to claim 4, characterized in that: The stirring shaft (22) extends out of the top of the fluidized bed tank (F1) and is connected to the motor (1). A sealing device (2) is provided between the fluidized bed tank (F1) and the stirring shaft (22).

Images