Double-membrane chemical wastewater treatment equipment

Abstract

The utility model relates to the technical field of wastewater treatment, and discloses double-membrane chemical wastewater treatment equipment which comprises a flocculation and sedimentation tank, a double-membrane system and a filtering and sedimentation tank, a partition plate is fixedly connected to the inner wall of the filtering and sedimentation tank in the circumferential direction, and the interior of the filtering and sedimentation tank is divided into a clear overflow area and a sewage area by the partition plate; the overflow pipe penetrates through and is fixedly connected to the partition plate, the two ends of the overflow pipe extend into the clear water overflowing area and the sewage area respectively, and a detachable filtering assembly is arranged in the overflow pipe. According to the utility model, the detachable filtering assembly is arranged in the overflow pipe, so that water overflowing to the clear water overflowing area through the overflow pipe can be filtered, the quality of water entering the double-membrane system is improved, and when the water enters the overflow pipe, the water enters the perforated steel pipe after being filtered by the filter element, and overflows to the clear water overflowing area, so that the water quality is improved. The pollution and blockage risks of the membrane are reduced, and the service life of the double-membrane system is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment, in particular to double-membrane chemical wastewater treatment equipment. Background Art

[0002] Industrial wastewater treatment equipment is an industrial equipment that can effectively treat urban domestic sewage, industrial wastewater, etc., and prevent sewage and pollutants from directly flowing into water areas. It is of great significance to improving the ecological environment, enhancing the quality of the city and promoting economic development.

[0003] Dual membrane treatment usually refers to the combination of two membrane technologies with different functions, such as the combination of ultrafiltration (UF) and reverse osmosis (RO). Dual membrane treatment of industrial wastewater has significant advantages such as good treatment effect, high efficiency, wastewater resource utilization, energy saving, small footprint, low maintenance cost and environmental friendliness.

[0004] Industrial wastewater usually contains suspended solids, grease, heavy metals and other pollutants, which can damage the membrane fibers and impair the performance of the membrane. Therefore, before entering the double membrane system, the wastewater needs to go through appropriate pretreatment steps to remove these pollutants.

[0005] The existing pretreatment before double membrane treatment mostly adopts a combination of chemical and physical methods, adding flocculants into the flocculation sedimentation tank and performing sedimentation to reduce the risk of membrane pollution and clogging.

[0006] However, in the process of sewage pretreatment, not only is the sewage treatment effect poor, but the treatment efficiency is also low, which affects the service life of the double membrane system. In order to solve the above problems, we propose a double membrane chemical wastewater treatment equipment. Utility Model Content

[0007] The utility model aims to provide a double-membrane chemical wastewater treatment device to solve the problem that in the process of sewage pretreatment, the sewage treatment effect is not good, the treatment efficiency is low, and the service life of the double-membrane system is affected.

[0008] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0009] A double-membrane chemical wastewater treatment equipment, comprising a flocculation sedimentation tank and a double-membrane system, and also comprising a filter sedimentation box, wherein a partition plate is fixedly connected to the inner wall of the filter sedimentation box in a circumferential direction, and the partition plate divides the filter sedimentation box into an overflow clean area and a sewage area;

[0010] An overflow pipe, the overflow pipe passes through and is fixed to the partition plate, and two ends of the overflow pipe extend to the overflow clean area and the sewage area respectively;

[0011] A filter assembly, wherein a detachable filter assembly is provided in the overflow pipe;

[0012] The flocculation sedimentation tank is connected to the sewage area, and the double membrane system is connected to the overflow cleaning area.

[0013] According to the above technical solution, the outer wall of the filtering and sedimentation box is provided with a liquid outlet pipe extending into the overflow area, and the partition plate is arranged inclined toward the direction of the liquid outlet pipe.

[0014] According to the above technical solution, a liquid collecting trough is provided on one side of the partition plate close to the liquid outlet pipe, and the liquid outlet pipe extends into the liquid collecting trough.

[0015] According to the above technical solution, the filter assembly includes an upper cover threadedly connected to the upper end of the overflow pipe, the lower side wall of the upper cover is fixedly connected to a perforated steel pipe, the outer wall of the perforated steel pipe is sleeved with a filter element extending into the overflow pipe, and the outer wall of the upper cover is provided with a water outlet pipe connected to the perforated steel pipe.

[0016] According to the above technical solution, a locking piece that abuts against the filter element is threadedly connected to the bottom of the perforated steel pipe.

[0017] According to the above technical solution, the lower side wall of the upper cover is provided with a sealing ring abutting against the overflow pipe.

[0018] According to the above technical solution, a liquid inlet box is provided in the sewage area, the upper end of the liquid inlet box passes through the partition plate and extends into the overflow area, a water inlet channel is formed in the liquid inlet box, a water inlet pipe is provided on the outer wall of the filter sedimentation box, the water inlet pipe extends to the upper part of the water inlet channel, and an inclined guide plate is fixedly connected between the inner walls of the liquid inlet box.

[0019] According to the above technical solution, a water baffle is fixedly connected between the inner walls of the liquid inlet box, and the water baffle is aligned with the water inlet pipe.

[0020] According to the above technical solution, the upper end of the liquid inlet box extends to the outside of the filtration and sedimentation box.

[0021] Compared with the prior art, the beneficial effects of the utility model are:

[0022] The utility model divides the filtering sedimentation box into an upper overflow clear area and a lower sewage area by means of a partition plate, and an overflow pipe is arranged through the partition plate, so that the wastewater entering the sewage area will undergo secondary sedimentation in the sewage area, and the precipitated particles and suspended matter will fall into the sludge hopper. As the wastewater in the sewage area increases, the secondary precipitated water will overflow into the overflow clear area through the overflow pipe, and then be transported to the double membrane system through a water pump, thereby improving the quality of water entering the double membrane system.

[0023] The utility model provides a detachable filter assembly in the overflow pipe, which can filter the water that overflows through the overflow pipe to the overflow cleaning area, thereby improving the quality of water entering the double membrane system. When the water enters the overflow pipe, the water will enter the perforated steel pipe after being filtered by the filter element. The water that enters the perforated steel pipe will overflow to the overflow cleaning area through the outlet pipe, and enter the liquid collecting tank under the guidance of the inclined partition plate, and enter the double membrane system through the outlet pipe, thereby reducing the risk of membrane pollution and clogging and increasing the service life of the double membrane system. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of the utility model double-membrane chemical wastewater treatment equipment;

[0025] Figure 2 It is a schematic diagram of the flocculation sedimentation tank and the filtration sedimentation box of the utility model;

[0026] Figure 3 It is a cross-sectional view inside the filter sedimentation box of the utility model;

[0027] Figure 4 It is a top view of the filter sedimentation box of the utility model;

[0028] Figure 5 It is a side sectional view of the filter sedimentation box of the utility model;

[0029] Figure 6 It is a cross-sectional view of the filter assembly of the utility model;

[0030] In the figure: 1. flocculation sedimentation tank; 2. double membrane system; 3. filter sedimentation box; 31. overflow area; 32. sewage area; 4. partition plate; 41. liquid collecting tank; 5. overflow pipe; 6. filter assembly; 61. upper cover; 62. perforated steel pipe; 63. filter element; 64. water outlet pipe; 65. locking piece; 66. sealing ring; 7. liquid outlet pipe; 8. liquid inlet box; 9. water inlet pipe; 11. guide plate; 12. water retaining plate; 13. sludge hopper. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] See also Figure 1-6 , the utility model provides a technical solution:

[0033] A double-membrane chemical wastewater treatment equipment comprises a flocculation sedimentation tank 1 and a double-membrane system 2. A flocculant is added into the flocculation sedimentation tank and sedimentation is performed to reduce the risk of membrane pollution and clogging. The double-membrane system 2 comprises an ultrafiltration column membrane (UF) and a reverse osmosis membrane (RO). The ultrafiltration membrane is a membrane with a pore size between 0.01 and 0.1 microns, which separates macromolecular substances and colloidal particles in water, can remove bacteria, viruses, organic matter, microorganisms and some high-molecular substances, reduce the pollution load of the reverse osmosis membrane, and extend the life of the reverse osmosis membrane. The reverse osmosis membrane excludes inorganic salts, inorganic matter, organic matter, bacteria, and virus plasma through diffusion, and can further filter the ultrafiltration membrane to remove tiny particles and ions that are not easily separated. The combined use of the double membranes can improve the efficiency of sewage treatment and the improvement of water quality.

[0034] It also includes a filter sedimentation box 3, the inner wall of which is circumferentially fixed with a partition plate 4, the partition plate 4 is sealed with the four inner walls of the filter sedimentation box 3, the partition plate 4 divides the filter sedimentation box 3 into an upper overflow area 31 and a lower sewage area 32, and a sludge hopper 13 is provided at the bottom of the filter sedimentation box 3 for collecting the sludge settled in the filter sedimentation box 3 and discharging it through a sludge discharge valve at the bottom of the sludge hopper 13.

[0035] The flocculation sedimentation tank 1 is connected to the sewage area 32, and a water pump is provided between the flocculation sedimentation tank 1 and the filtration sedimentation tank 3, which is used to send the wastewater preliminarily precipitated in the flocculation sedimentation tank 1 into the sewage area 32. The water inlet end of the ultrafiltration column membrane on the double membrane system 2 is connected to the overflow area 31, and a water pump is also provided between the double membrane system 2 and the filtration sedimentation tank 3, which is used to send the water in the overflow area 31 into the double membrane system 2 and can provide pressure to the ultrafiltration column membrane on the double membrane system 2.

[0036] An overflow pipe 5 is fixedly connected to the partition plate 4. The overflow pipe 5 passes through the partition plate 4. Both ends of the overflow pipe 5 extend to the overflow and clean area 31 and the sewage area 32 respectively. The wastewater entering the sewage area 32 will undergo secondary sedimentation, and the precipitated particles and suspended matter will fall into the sludge hopper 13. As the amount of wastewater in the sewage area 32 increases, the secondary precipitated water will overflow into the overflow and clean area 31 through the overflow pipe 5, and then be transported to the double membrane system 2 through a water pump.

[0037] By providing a detachable filter assembly 6 in the overflow pipe 5, the water overflowing from the overflow pipe 5 to the overflow cleaning area 31 can be filtered, thereby improving the quality of water entering the double membrane system 2, reducing the risk of membrane contamination and clogging, and increasing the service life of the double membrane system.

[0038] Specifically, the outer wall of the filtration sedimentation box 3 is provided with a liquid outlet pipe 7 extending into the overflow area 31. The double membrane system 2 is connected to the overflow area 31 through the liquid outlet pipe 7. The partition plate 4 is inclined toward the direction of the liquid outlet pipe 7 to guide the water entering the overflow area 31, making it convenient for the water in the overflow area 31 to enter the double membrane system 2 through the liquid outlet pipe 7.

[0039] Specifically, a liquid collecting tank 41 is provided on one side of the partition plate 4 close to the liquid outlet pipe 7 , and the liquid outlet pipe 7 extends into the liquid collecting tank 41 , further facilitating the water in the overflow area 31 to enter the double membrane system 2 through the liquid outlet pipe 7 .

[0040] Specifically, the filter assembly 6 includes an upper cover 61 threadedly connected to the upper end of the overflow pipe 5, so that the upper cover 61 can be removed conveniently to replace the filter element 63. A perforated steel pipe 62 is fixedly connected to the lower side wall of the upper cover 61. The outer wall of the perforated steel pipe 62 is sleeved with a filter element 63 extending into the overflow pipe 5. By arranging the filter element 63 in the overflow pipe 5, the water entering the overflow cleaning area 31 through the overflow pipe 5 can be filtered. The outer wall of the perforated steel pipe 62 is provided with a plurality of through holes for the water filtered by the filter element 63 to pass through. The bottom of the perforated steel pipe 62 is closed (i.e., the bottom is not open). The outer wall of the upper cover 61 is provided with a water outlet pipe 64 connected to the perforated steel pipe 62. The water entering the perforated steel pipe 62 can overflow to the overflow cleaning area 31 through the water outlet pipe 64.

[0041] Specifically, the bottom of the perforated steel pipe 62 is threaded with a locking piece 65 that abuts against the filter element 63. The bottom of the perforated steel pipe 62 is integrally formed with a threaded column. The locking piece 65 is a pressure plate with a screw. By screwing the screw into the screw hole of the threaded column, the pressure plate can press and lock the filter element 63.

[0042] Specifically, a sealing ring 66 abutting against the overflow pipe 5 is provided on the lower side wall of the upper cover 61 to prevent waste water from entering the perforated steel pipe 62 through the gap between the upper cover 61 and the overflow pipe 5 .

[0043] Specifically, a liquid inlet box 8 is provided in the sewage area 32, and the upper and lower ends of the liquid inlet box 8 are opened to form a water inlet channel in the liquid inlet box 8. The upper end of the liquid inlet box 8 passes through the partition plate 4 and extends to the overflow area 31. The bottom of the liquid inlet box 8 is lower than the lower end of the overflow pipe 5. The outer wall of the filtration sedimentation box 3 is provided with an inlet pipe 9, which extends to the upper part of the water inlet channel. An inclined guide plate 11 is fixed between the inner walls of the liquid inlet box 8, and the guide plate 11 can buffer the wastewater pumped in by the water pump.

[0044] Compared with opening the water inlet pipe 9 at the lower part of the filter sedimentation box 3 or on the sludge hopper 13, when the water pump transports the wastewater in the flocculation sedimentation tank 1 to the filter sedimentation box 3, the impact force of the wastewater pumped out by the water pump will not impact the sediment deposited at the bottom of the filter sedimentation box 3 and in the sludge hopper 13, thereby reducing the pollution to the filter element 63, increasing the service life of the filter element 63, and saving costs.

[0045] Specifically, a water baffle 12 is fixedly connected between the inner walls of the liquid inlet box 8, and the water baffle 12 is arranged in an L shape. A downstream channel is formed between the vertical plate of the water baffle 12 and the guide plate 11. The water baffle 12 is aligned with the water inlet pipe 9, which can block the wastewater pumped out by the water pump to prevent excessive impact force from stirring up the sediment at the bottom of the filter sedimentation box 3 and the sludge hopper 13. The horizontal plate of the water baffle 12 can prevent the wastewater entering the water inlet channel from overflowing.

[0046] Specifically, the upper end of the liquid inlet box 8 extends to the outside of the filter sedimentation box 3 to prevent the wastewater in the water inlet channel from overflowing after the water level in the filter sedimentation box 3 rises.

[0047] Working principle:

[0048] When pre-treating the wastewater before entering the double membrane system, the wastewater in the flocculation sedimentation tank 1 will enter the upper part of the water inlet channel through the water inlet pipe 9, and enter the sewage area 32 under the buffering guidance of the guide plate 11. The wastewater entering the sewage area 32 will undergo secondary sedimentation, and the precipitated particles and suspended matter will fall into the sludge hopper 13. As the amount of wastewater in the sewage area 32 increases, the secondary precipitated water will overflow through the overflow pipe 5 into the overflow cleaning area 31, and then be transported to the double membrane system 2 through the water pump.

[0049] When water enters the overflow pipe 5, the water will enter the perforated steel pipe 62 through the filter element 63. By arranging the filter element 63 in the overflow pipe 5, the water entering the overflow area 31 through the overflow pipe 5 can be filtered. The water entering the perforated steel pipe 62 will overflow to the overflow area 31 through the outlet pipe 64, and enter the liquid collecting tank 41 under the guidance of the inclined partition plate 4, and enter the double membrane system 2 through the outlet pipe 7.

[0050] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0051] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A double membrane chemical wastewater treatment equipment, comprising a flocculation sedimentation tank (1) and a double membrane system (2), characterized in that: Also includes: A filtering and settling box (3), wherein a partition plate (4) is fixedly connected to the inner wall of the filtering and settling box (3) in a circumferential direction, and the partition plate (4) divides the inside of the filtering and settling box (3) into an overflow clean area (31) and a sewage area (32); An overflow pipe (5), the overflow pipe (5) passes through and is fixedly connected to the partition plate (4), and two ends of the overflow pipe (5) extend into the overflow clean area (31) and the sewage area (32) respectively; A filter assembly (6), wherein a detachable filter assembly (6) is arranged in the overflow pipe (5); The flocculation sedimentation tank (1) is connected to the sewage area (32), and the double membrane system (2) is connected to the overflow cleaning area (31).

2. A double membrane chemical wastewater treatment equipment according to claim 1, characterized in that: The outer wall of the filtering sedimentation box (3) is provided with a liquid outlet pipe (7) extending into the overflow area (31), and the partition plate (4) is arranged to be inclined in the direction of the liquid outlet pipe (7).

3. A double membrane chemical wastewater treatment equipment according to claim 2, characterized in that: A liquid collecting trough (41) is provided on one side of the partition plate (4) close to the liquid outlet pipe (7), and the liquid outlet pipe (7) extends into the liquid collecting trough (41).

4. A double membrane chemical wastewater treatment equipment according to claim 1, characterized in that: The filter assembly (6) comprises an upper cover (61) threadedly connected to the upper end of the overflow pipe (5); a perforated steel pipe (62) is fixedly connected to the lower side wall of the upper cover (61); a filter element (63) extending into the overflow pipe (5) is sleeved on the outer wall of the perforated steel pipe (62); and a water outlet pipe (64) connected to the perforated steel pipe (62) is provided on the outer wall of the upper cover (61).

5. A double membrane chemical wastewater treatment equipment according to claim 4, characterized in that: A locking piece (65) is threadedly connected to the bottom of the perforated steel pipe (62) and abuts against the filter element (63).

6. A double membrane chemical wastewater treatment equipment according to claim 4, characterized in that: The lower side wall of the upper cover (61) is provided with a sealing ring (66) abutting against the overflow pipe (5).

7. A double membrane chemical wastewater treatment equipment according to claim 1, characterized in that: A liquid inlet box (8) is provided in the sewage area (32), the upper end of the liquid inlet box (8) passes through the partition plate (4) and extends into the overflow area (31), a water inlet channel is formed in the liquid inlet box (8), an outer wall of the filtering sedimentation box (3) is provided with a water inlet pipe (9), the water inlet pipe (9) extends to the upper part of the water inlet channel, and an inclined guide plate (11) is fixedly connected between the inner walls of the liquid inlet box (8).

8. A double membrane chemical wastewater treatment equipment according to claim 7, characterized in that: A water baffle (12) is fixedly connected between the inner walls of the liquid inlet box (8), and the water baffle (12) is aligned with the water inlet pipe (9).

9. A double membrane chemical wastewater treatment equipment according to claim 7, characterized in that: The upper end of the liquid inlet box (8) extends to the outside of the filtering and sedimentation box (3).

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