Ultrafiltration deep sewage treatment system

Abstract

This utility model discloses an ultrafiltration deep wastewater treatment system, relating to the field of wastewater treatment technology. The utility model includes an assembly base and connecting water pipes. A system control cabinet is installed on one side of the upper end of the assembly base. A membrane tank and a membrane permeate tank are respectively opened on both sides of the middle of the upper end of the assembly base. A water inlet structure is provided on one side of the membrane tank. A submerged ultrafiltration membrane is detachably installed inside the membrane tank. The wastewater treatment system can be manufactured as an integrated skid-mounted device and fixed by a steel frame. The main equipment of the system includes a submerged ultrafiltration membrane, a membrane tank, a membrane permeate tank, a membrane self-priming pump, a membrane backwash pump, and an aeration blower. This equipment can operate in indoor and outdoor environments and requires a 380V power supply. Wastewater treated by the biological treatment system is coarsely filtered through a basket filter by the inlet pump before entering the membrane tank, which consists of a submerged ultrafiltration membrane and a steel membrane tank.

Description

Technical Field

[0001] This utility model belongs to the field of wastewater treatment technology, and in particular relates to an ultrafiltration deep wastewater treatment system. Background Technology

[0002] Wastewater refers to polluted water bodies, which usually contain harmful substances and may come from domestic, industrial, agricultural or natural runoff. Wastewater treatment refers to the process of removing pollutants from wastewater through physical, chemical or biological methods to make it meet discharge standards or reuse requirements.

[0003] Existing advanced wastewater treatment technologies, such as coagulation sedimentation and high-efficiency sedimentation tanks, suffer from problems such as large equipment size, large footprint, complex treatment process, and sensitivity to suspended solids concentration. These often lead to unstable effluent quality and difficulties in operation and management. In recent years, membrane separation technology has attracted attention due to its high efficiency in interception and effluent stability. However, traditional split-type membrane systems are complex to install and not conducive to standardized promotion.

[0004] To address these issues, we provide an ultrafiltration-based deep wastewater treatment system. Utility Model Content

[0005] The purpose of this invention is to provide an ultrafiltration deep wastewater treatment system that can be combined with traditional biological treatment systems for deep wastewater treatment, and can also be applied to oil removal processes in industries such as petroleum and chemical manufacturing.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] This utility model relates to an ultrafiltration deep wastewater treatment system, comprising an assembly base and connecting water pipes. A system control cabinet is installed on one side of the upper end of the assembly base. A membrane tank and a membrane permeate tank are respectively opened on both sides of the middle of the upper end of the assembly base. A water inlet structure is provided on one side of the membrane tank. A submerged ultrafiltration membrane is detachably installed inside the membrane tank. A water pump is provided at the upper end of the submerged ultrafiltration membrane. A membrane self-priming pump is installed on one side of the upper end of the assembly base. The input end of the membrane self-priming pump is connected to the water pump, and the output end of the membrane self-priming pump is connected to the membrane permeate tank through the connecting water pipe. A backwashing structure is provided inside the membrane tank.

[0008] The present invention is further configured such that the water inlet structure includes a water inlet pump, the water inlet pump is fixedly installed on the upper end of the assembly base, a basket filter is installed on one side of the upper end of the assembly base, the basket filter is located on one side of the water inlet pump, the input end of the basket filter is connected to the output end of the water inlet pump through a connecting water pipe, and the output end of the basket filter is connected to the membrane tank through a connecting water pipe.

[0009] The present invention is further configured such that an aeration disc is installed inside the membrane tank, the aeration disc is located below the submerged ultrafiltration membrane, an aeration pipe is installed on one side of the aeration disc, an aeration blower is installed at the upper end of the mounting base, and the output end of the aeration blower is connected to the aeration pipe.

[0010] The present invention is further configured such that a drain pipe is provided at the lower end of one side of the membrane tank, a water outlet pipe is provided at the lower end of one side of the membrane water production tank, an overflow trough is provided at the upper end of one side of the inner wall of the membrane tank, and an overflow pipe is installed at the lower end of the overflow trough.

[0011] The present invention is further configured such that an mounting bracket is installed on the upper end of the assembly base, the mounting bracket is T-shaped, the mounting bracket is located between the membrane tank and the membrane permeate tank, and ultrasonic liquid level sensors are fixedly installed on both sides of the mounting bracket.

[0012] The present invention is further configured such that a sodium hypochlorite mixing tank and a citric acid mixing tank are fixedly installed on one side of the upper end of the assembly base, and a mixing pipe is provided at the lower end of one side of both the sodium hypochlorite mixing tank and the citric acid mixing tank, with the output end of the mixing pipe extending into the interior of the membrane tank.

[0013] The present invention is further configured such that an online pH meter is fixedly installed on one side of the upper end of the membrane tank, and the online pH meter is used in conjunction with the sodium hypochlorite preparation tank and the citric acid preparation tank.

[0014] The present invention is further configured such that the backwashing structure includes a membrane backwashing pump, the membrane backwashing pump is fixedly installed on the upper end of the assembly base, the input end of the membrane backwashing pump is connected to the membrane product water tank through a connecting water pipe, the output end of the membrane backwashing pump is equipped with a flushing pipe connected to a pumping pipe, and control valves are provided on the surface of both the flushing pipe and the pumping pipe.

[0015] This utility model has the following beneficial effects:

[0016] 1. In this utility model, the wastewater treatment system can be made into an integrated skid-mounted device and fixed by a steel frame. The main equipment of the system includes a submerged ultrafiltration membrane, a membrane tank, a membrane permeate tank, a membrane self-priming pump, a membrane backwash pump, and an aeration blower. The equipment can operate in indoor and outdoor environments and requires a 380V power supply. The wastewater treated by the biological treatment system is coarsely filtered by a basket filter through an influent pump and then enters the membrane tank. The membrane tank consists of a submerged ultrafiltration membrane and a steel membrane tank. When the equipment is running, the membrane is submerged in the wastewater. The submerged ultrafiltration membrane is a spiral wound flat sheet membrane with an open internal flow channel, which occupies a small area and has a large membrane area. The pore size of the ultrafiltration membrane is between 0.03 micrometers and 0.06 micrometers, which can filter out pollutants with a molecular weight of more than 300,000 Daltons and can tolerate a suspended solids concentration of up to 1,000 mg / L.

[0017] 2. In this utility model, the ultrafiltration deep wastewater treatment system uses a membrane backwash pump to use part of the ultrafiltration membrane product water inside the product water tank as backwash water. The working cycle of the backwash structure is 30 to 40 seconds of backwashing every 15 to 30 minutes of operation to ensure the stable operation of the submerged ultrafiltration membrane.

[0018] 3. This utility model has a wide range of applications, and can be combined with biological treatment technology as well as with degreasing processes in industrial, petrochemical and other fields.

[0019] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a three-dimensional structural diagram of the device of this utility model;

[0022] Figure 2 This is a side view of the device of this utility model;

[0023] Figure 3 This is a half-sectional side view of the membrane tank inside the device of this utility model;

[0024] Figure 4 For the present utility model Figure 3 Enlarged structural diagram at point A in the middle.

[0025] The attached diagram lists the components represented by each number as follows:

[0026] 100. Assembly base; 110. System control cabinet; 200. Aeration blower; 201. Aeration pipe; 300. Inlet pump; 301. Connecting water pipe; 310. Basket filter; 400. Membrane tank; 401. Sewage pipe; 402. Overflow pipe; 403. Overflow tank; 410. Submerged ultrafiltration membrane; 411. Pumping pipe; 412. Control valve; 420. Online pH meter; 430. Mounting bracket; 431. Ultrasonic level sensor; 440. Aeration disc; 500. Membrane permeate tank; 501. Outlet pipe; 600. Sodium hypochlorite dosing tank; 610. Dosing pipe; 700. Citric acid dosing tank; 800. Membrane self-priming pump; 900. Membrane backwash pump; 910. Flushing pipe. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0028] like Figures 1 to 3 As shown, this embodiment provides an ultrafiltration deep wastewater treatment system, including an assembly base 100 and a connecting water pipe 301. A system control cabinet 110 is installed on one side of the upper end of the assembly base 100. A membrane tank 400 and a membrane permeate tank 500 are respectively opened on both sides of the middle of the upper end of the assembly base 100. A water inlet structure is provided on one side of the membrane tank 400. A submerged ultrafiltration membrane 410 is detachably installed inside the membrane tank 400. A water pump 411 is provided at the upper end of the submerged ultrafiltration membrane 410. A membrane self-priming pump 800 is installed on one side of the upper end of the assembly base 100. The input end is connected to the water pump 411, and the output end of the membrane self-priming pump 800 is connected to the membrane product water tank 500 through the connecting water pipe 301. The water inlet structure includes a water inlet pump 300, which is fixedly installed on the upper end of the mounting base 100. A basket filter 310 is installed on one side of the upper end of the mounting base 100. The basket filter 310 is located on one side of the water inlet pump 300. The input end of the basket filter 310 is connected to the output end of the water inlet pump 300 through the connecting water pipe 301, and the output end of the basket filter 310 is connected to the membrane tank 400 through the connecting water pipe 301.

[0029] In this embodiment, the system can be designed as a standardized skid-mounted module, suitable for municipal sewage treatment plants, biochemical effluent upgrading projects, industrial park drainage system renovation, and deep treatment systems integrated with existing or newly built oil removal processes. The main equipment of the system includes a submerged ultrafiltration membrane 410, a membrane tank 400, a membrane permeate tank 500, a membrane self-priming pump 800, a membrane backwash pump 900, and an aeration blower 200. The equipment can operate in indoor and outdoor environments and requires a 380V power supply.

[0030] Wastewater treated by the biological treatment system is coarsely filtered by basket filter 310 through inlet pump 300 and then enters membrane tank 400. Membrane tank 400 consists of submerged ultrafiltration membrane 410 and steel membrane tank 400. When the equipment is running, the membrane is submerged in wastewater. Submerged ultrafiltration membrane 410 is a spiral wound flat sheet membrane with an open flow channel inside. It has a small footprint and a large membrane area. The pore size of the ultrafiltration membrane is between 0.03 micrometers and 0.06 micrometers. It can filter out pollutants with a molecular weight of more than 300,000 Daltons and can tolerate a suspended solids concentration of up to 1,000 mg / L and oily pollutants up to 100 mg / L.

[0031] Wastewater treatment capacity can be increased by increasing the number of ultrafiltration membranes in the membrane tank 400. Each membrane has an area of ​​27.4 square meters and can treat 1 to 1.5 tons of wastewater per hour. Each square meter of the membrane tank 400 can accommodate 8 membranes, meaning each square meter can treat 8 to 12 tons of wastewater per hour.

[0032] like Figure 2 and Figure 3 As shown, this embodiment provides an ultrafiltration deep wastewater treatment system. An aeration disc 440 is installed inside the membrane tank 400. The aeration disc 440 is located below the submerged ultrafiltration membrane 410. An aeration pipe 201 is installed on one side of the aeration disc 440. An aeration blower 200 is installed on the upper end of the mounting base 100. The output end of the aeration blower 200 is connected to the aeration pipe 201.

[0033] In this embodiment, after the wastewater enters the submerged ultrafiltration membrane 410 tank 400, the membrane permeate tank 500 generates negative pressure, drawing water from the membrane surface into the permeate channel inside the membrane, while pollutants are trapped outside the membrane. While the membrane permeate tank 500 is operating, the aeration blower 200 continuously aerates the membrane, creating a rubbing effect on the membrane surface. The aeration and rubbing intensity of each membrane is 5.6-6 m³ / h, effectively preventing suspended solids from accumulating on the membrane surface, thereby avoiding affecting the membrane flux.

[0034] like Figures 2 to 4 As shown, this embodiment provides an ultrafiltration deep wastewater treatment system. A drain pipe 401 is provided at the lower end of one side of the membrane tank 400, and an outlet pipe 501 is provided at the lower end of one side of the membrane product tank 500. An overflow tank 403 is provided at the upper end of one side of the inner wall of the membrane tank 400, and an overflow pipe 402 is installed at the lower end of the overflow tank 403. An mounting bracket 430 is installed at the upper end of the mounting base 100. The mounting bracket 430 is T-shaped and is located between the membrane tank 400 and the membrane product tank 500. Ultrasonic liquid level sensors 431 are fixedly installed on both sides of the mounting bracket 430.

[0035] In this embodiment, impurities remaining inside the membrane tank 400 can be discharged through the drain pipe 401, and floating objects floating on the water surface of the membrane tank 400 can be discharged through the overflow tank 403 and the overflow pipe 402. The ultrasonic level sensor 431 facilitates the monitoring of the water level inside the membrane production tank 500 and the membrane tank 400.

[0036] like Figure 1 and Figure 2As shown, this embodiment provides an ultrafiltration deep wastewater treatment system. A sodium hypochlorite mixing tank 600 and a citric acid mixing tank 700 are fixedly installed on one side of the upper end of the mounting base 100. A mixing pipe 610 is provided at the lower end of one side of both the sodium hypochlorite mixing tank 600 and the citric acid mixing tank 700. The output end of the mixing pipe 610 extends into the interior of the membrane tank 400. An online pH meter 420 is fixedly installed on one side of the upper end of the membrane tank 400. The online pH meter 420 cooperates with the sodium hypochlorite mixing tank 600 and the citric acid mixing tank 700.

[0037] In this embodiment, the entire system operates fully automatically without the need for personnel on duty. After several days of operation, the ultrafiltration membrane is cleaned by adding chemicals through an online enhanced cleaning system. The cleaning agents include 30% citric acid and 10% sodium hypochlorite, which are used to clean inorganic and organic pollutants, respectively. The pH value of acid washing is 2-3, and the pH value of sodium hypochlorite cleaning is 10-11. The amount of cleaning chemicals is controlled by a pH meter to prevent excessive use of chemicals.

[0038] like Figure 2 and Figure 3 As shown, this embodiment provides an ultrafiltration deep wastewater treatment system. The membrane tank 400 is equipped with a backwashing structure. The backwashing structure includes a membrane backwash pump 900, which is fixedly installed on the upper end of the mounting base 100. The input end of the membrane backwash pump 900 is connected to the membrane product water tank 500 through a connecting water pipe 301. The output end of the membrane backwash pump 900 is equipped with a flushing pipe 910 connected to a pumping pipe 411. Both the flushing pipe 910 and the pumping pipe 411 are equipped with control valves 412.

[0039] In this embodiment, the ultrafiltration deep wastewater treatment system uses a membrane backwash pump 900 to use a portion of the ultrafiltration membrane permeate inside the permeate tank as backwash water. The backwash structure operates for 30 to 40 seconds every 15 to 30 minutes to ensure the stable operation of the submerged ultrafiltration membrane 410.

[0040] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0041] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. An ultrafiltration deep wastewater treatment system, comprising an assembly base (100) and a connecting water pipe (301), characterized in that: A system control cabinet (110) is provided on one side of the upper end of the assembly base (100). A membrane tank (400) and a membrane product water tank (500) are respectively opened on both sides of the middle of the upper end of the assembly base (100). A water inlet structure is provided on one side of the membrane tank (400). An immersion ultrafiltration membrane (410) is detachably installed inside the membrane tank (400). A water pump (411) is provided at the upper end of the immersion ultrafiltration membrane (410). A membrane self-priming pump (800) is installed on one side of the upper end of the assembly base (100). The input end of the membrane self-priming pump (800) is connected to the water pump (411). The output end of the membrane self-priming pump (800) is connected to the membrane product water tank (500) through a connecting water pipe (301). A backwashing structure is provided inside the membrane tank (400).

2. The ultrafiltration deep wastewater treatment system according to claim 1, characterized in that: The water inlet structure includes a water inlet pump (300), which is fixedly installed on the upper end of the mounting base (100). A basket filter (310) is installed on one side of the upper end of the mounting base (100). The basket filter (310) is located on one side of the water inlet pump (300). The input end of the basket filter (310) is connected to the output end of the water inlet pump (300) through a connecting water pipe (301). The output end of the basket filter (310) is connected to the membrane tank (400) through a connecting water pipe (301).

3. The ultrafiltration deep wastewater treatment system according to claim 1, characterized in that: An aeration disc (440) is installed inside the membrane tank (400). The aeration disc (440) is located below the submerged ultrafiltration membrane (410). An aeration pipe (201) is installed on one side of the aeration disc (440). An aeration blower (200) is installed at the upper end of the mounting base (100). The output end of the aeration blower (200) is connected to the aeration pipe (201).

4. The ultrafiltration deep wastewater treatment system according to claim 3, characterized in that: A drain pipe (401) is provided at the lower end of one side of the membrane tank (400), a water outlet pipe (501) is provided at the lower end of one side of the membrane water production tank (500), an overflow tank (403) is provided at the upper end of one side of the inner wall of the membrane tank (400), and an overflow pipe (402) is installed at the lower end of the overflow tank (403).

5. The ultrafiltration deep wastewater treatment system according to claim 4, characterized in that: An mounting bracket (430) is installed on the upper end of the assembly base (100). The mounting bracket (430) is T-shaped and is located between the membrane tank (400) and the membrane permeate tank (500). Ultrasonic liquid level sensors (431) are fixedly installed on both sides of the mounting bracket (430).

6. The ultrafiltration deep wastewater treatment system according to claim 1, characterized in that: A sodium hypochlorite mixing tank (600) and a citric acid mixing tank (700) are fixedly installed on one side of the upper end of the assembly base (100). A mixing tube (610) is provided at the lower end of one side of both the sodium hypochlorite mixing tank (600) and the citric acid mixing tank (700). The output end of the mixing tube (610) extends into the interior of the membrane tank (400).

7. The ultrafiltration deep wastewater treatment system according to claim 6, characterized in that: An online pH meter (420) is fixedly installed on one side of the upper end of the membrane tank (400). The online pH meter (420) is used in conjunction with the sodium hypochlorite preparation tank (600) and the citric acid preparation tank (700).

8. The ultrafiltration deep wastewater treatment system according to claim 1, characterized in that: The backwashing structure includes a membrane backwash pump (900), which is fixedly installed on the upper end of the mounting base (100). The input end of the membrane backwash pump (900) is connected to the membrane product tank (500) through a connecting water pipe (301). The output end of the membrane backwash pump (900) is equipped with a flushing pipe (910) connected to a pumping pipe (411). Both the flushing pipe (910) and the pumping pipe (411) are equipped with control valves (412).

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