A new treatment system for high turbidity surface water

Abstract

The present invention discloses a novel high-turbidity surface water treatment system, which belongs to the field of water treatment technology. The system comprises an equipment room, a clear water tank, a membrane frame tank and a membrane sedimentation channel. One side of the membrane sedimentation channel is connected to a water source, and the bottom of the membrane sedimentation channel is in a 5° slope. A membrane frame tank and an equipment room are arranged on the other side of the membrane sedimentation channel. The membrane sedimentation channel and the clear water tank are connected through a pipeline. Gate valves are arranged at both ends of the membrane sedimentation channel, a retaining wall is arranged on one side of a gate valve, and a mud flushing hole is opened at the bottom of the retaining wall. A high-flux membrane is arranged inside the membrane sedimentation channel through a membrane frame, and gravity flow is driven as the main energy to operate at ultra-low pressure and high flux, thereby effectively reducing water production energy consumption; the chemical dosing process is omitted and the physical process is simplified, thereby avoiding secondary pollution caused by chemical agents; and there is a higher concentration of suspended sediment in the membrane sedimentation channel 3, which has a good removal effect on micro-polluted organic matter; the equipment integration is significantly improved, unmanned operation is achieved and labor costs are reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of water treatment, and in particular relates to a novel high-turbidity surface water treatment system. Background Art

[0002] Conventional treatment processes for high-turbidity surface water use coagulation, sedimentation, and filtration to achieve target water quality. This process requires the addition of large amounts of chemicals, and the dosage of coagulants and flocculants must be adjusted based on the sand content of the incoming water. Existing technologies, in particular, cannot monitor the constantly changing sand content online, making fully automated, unmanned operation impossible. Single-stage sedimentation alone is insufficient, necessitating a multi-stage process.

[0003] Based on the application of ultrafiltration membranes in drinking water purification, surface water treatment, sewage treatment and reclaimed water reuse, we will develop the HTSUF-Ⅰ high-turbidity surface water membrane treatment sedimentation tank based on the GZ-BT-30A high-quality high-flux membrane product jointly developed by the State Key Laboratory and Gansu Langqian Environmental Science Research Co., Ltd., and use it for the direct filtration of high-turbidity surface water, realizing a short-process and high-efficiency replacement of the multi-stage sedimentation and filtration process, and realizing efficient membrane integrated purification of high-turbidity surface water. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to address the problem raised in the background technology.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A novel high-turbidity surface water treatment system comprises an equipment room, a clear water tank, a membrane frame tank and a membrane sedimentation channel, one side of the membrane sedimentation channel is connected to a water source, the bottom of the membrane sedimentation channel is sloped at 5°, a membrane frame tank and an equipment room are provided on the other side of the membrane sedimentation channel, the membrane sedimentation channel and the clear water tank are connected by a pipeline, gate valves are provided at both ends of the membrane sedimentation channel, a retaining wall is provided on one side of one gate valve, a mud flushing hole is provided at the bottom of the retaining wall, and a high-flux membrane is provided inside the membrane sedimentation channel through a membrane frame.

[0007] A recoil blower, a medicine storage tank, a dosing pump and an electric control cabinet are arranged inside the equipment room, and the electric control cabinet is electrically connected to the recoil blower and the dosing pump.

[0008] The backwash fan is connected to the membrane precipitation channel through a pipeline, and the dosing pump is connected to the medicine storage tank and the membrane precipitation channel through a pipeline.

[0009] A hollow cavity is provided in the middle of the high-flux membrane, and the hollow cavity is connected to a negative pressure pump through a membrane frame. The negative pressure pump is provided inside the clear water tank and is electrically connected to an electric control cabinet.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] The present invention is mainly driven by gravity flow and can operate at ultra-low pressure and high throughput, effectively reducing the energy consumption of water production; eliminating the chemical dosing process and simplifying the physical process, avoiding secondary pollution caused by chemical agents. Since no coagulant is added, the bottom sludge is discharged smoothly and the sludge accumulation commonly seen in general sedimentation tanks will not occur; and there is a high concentration of suspended sediment in the membrane sedimentation channel 3, which has a good removal effect on micro-polluting organic matter; the equipment integration is significantly improved, reducing the water consumption for sludge discharge and improving water production efficiency, which can ensure the water quality of produced water and shorten the treatment process, realize unmanned operation and reduce labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the layout structure of an embodiment of the present invention.

[0013] Figure 2 It is a structural schematic diagram of a water retaining wall according to an embodiment of the present invention.

[0014] Figure 3 Schematic diagram of static pressure water production according to an embodiment of the present invention.

[0015] Figure 4 Schematic diagram of water production from pumping according to an embodiment of the present invention.

[0016] Figure 5 This is a statistical diagram of the produced water turbidity according to an embodiment of the present invention.

[0017] Figure 6 Schematic diagram of the change of sediment content in raw water according to an embodiment of the present invention.

[0018] Serial number and name of the attached drawings: equipment room 1, clear water tank 2, membrane sedimentation channel 3, gate valve 4, retaining wall 5, mud flushing hole 6, backwash fan 7, drug storage tank 8, dosing pump 9, electric control cabinet 10. DETAILED DESCRIPTION

[0019] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention but are not intended to limit the present invention.

[0020] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0021] Example 1

[0022] like Figure 1-6 As shown, a novel high-turbidity surface water treatment system according to the present invention comprises an equipment room 1, a clear water tank 2, a membrane rack tank and a membrane sedimentation channel 3. One side of the membrane sedimentation channel 3 is connected to a water source, and the bottom of the membrane sedimentation channel 3 is in a 5° slope. A membrane rack tank and an equipment room 1 are provided on the other side of the membrane sedimentation channel 3. The membrane sedimentation channel 3 and the clear water tank 2 are connected by a pipeline. Gate valves 4 are provided at both ends of the membrane sedimentation channel 3. A retaining wall 5 is provided on one side of the gate valve 4. The retaining wall 5 A mud flushing hole 6 is provided at the bottom, and a high-flux membrane is arranged inside the membrane sedimentation channel 3 through a membrane frame 6. A backwash fan 7, a medicine storage tank 8, a dosing pump 9 and an electric control cabinet 10 are arranged inside the equipment room 1. The electric control cabinet 10 is electrically connected to the backwash fan 7 and the dosing pump 9. The backwash fan 7 is connected to the membrane sedimentation channel 3 through a pipeline. The dosing pump 9 is connected to the medicine storage tank 8 and the membrane sedimentation channel 3 through a pipeline. A hollow cavity is provided in the middle of the high-flux membrane, and the hollow cavity is connected to the negative pressure pump through the membrane frame 6. The negative pressure pump is arranged inside the clear water tank 2, and the negative pressure pump is electrically connected to the electric control cabinet 10.

[0023] The GZ-BT-30A high-flux membrane, jointly developed by the State Key Laboratory and Gansu Langqian Environmental Science Research Co., Ltd., has a uniformly distributed separation pore size of ≤0.08 microns and a curtain-like appearance that is easy to disassemble and assemble. It can use a water pump to pump out negative pressure water, or use gravity flow to drive water production, and can efficiently achieve high-quality and high-flux treatment of high-turbidity surface water.

[0024] The project treatment scale is 100m3 / h; the water production pressure of the membrane component during operation is 0.005~0.05MPa, and the transmembrane pressure difference during operation is ≤0.035MPa, which can maintain low operating power consumption; the membrane system adopts micro-bubble scrubbing combined with low-pressure backwashing to eliminate membrane pollution online and restore membrane flux; the operation process is automatically controllable. Under the current working conditions, the average water production flux of the membrane operation can reach 30L / M2H using gravity flow drive and 65L / M2H using negative pressure pump suction; the promised service life is more than 5 years.

[0025] The membrane sedimentation channel 3 is parallel to the water flow direction of the water source, and the water inlet of the membrane sedimentation channel 3 is downstream of the water flow direction. When the gate valve 4 is opened, the water will flow into the interior of the membrane sedimentation channel 3 along the slope at the bottom of the membrane sedimentation channel 3, and the negative pressure pump will be started to make the hollow cavity inside the high-flux membrane negative pressure. When water passes through the high-flux membrane, it will be filtered by the high-flux membrane, and the filtered clean water will enter the hollow cavity of the high-flux membrane. Due to the dual effects of negative pressure and siphon, the clean water will enter the clean water tank 2 along the pipeline.

[0026] When the turbidity of the water in the water source is very high and the filtration efficiency of the high-flux membrane is reduced, the negative pressure is continuously increased by the negative pressure pump inside the clear water tank to improve the water production efficiency. At the same time, ventilation is performed by the backwash fan 7, which can cause the high-flux membrane to shake and, with the force of the water flow, clean the surface of the high-flux membrane and maintain the filtration efficiency of the high-flux membrane.

[0027] After the system has been running for a period of time, when there is a lot of sediment deposited in the membrane sedimentation channel 3, open the gate valve 4 upstream of the water flow, and the water will be pressurized into the membrane sedimentation channel 3 through the mud flushing hole 6. At the same time, turn on the backwash fan 7 to prevent the sediment from settling, and flush the accumulated sediment out of the membrane sedimentation channel 3. The negative pressure pump can act as a backwash pump to enhance the backwash force and better clean the membrane sedimentation channel 3.

[0028] Debugging preliminary data

[0029] Design scale: 100m 3 / h; designed water turbidity ≤30NTU.

[0030] Start the equipment and start debugging: one front-end water pump is working (Q=65m3 / h), and the equipment uses static pressure to produce water to meet the water supply requirements. After the equipment is started, it has been running continuously for 168 hours, with a total water production of 10107.29 tons and an average water production of 60.16m3. 3 / h.

[0031] The debugging is divided into two ways of producing water: static pressure water production and suction pump negative pressure suction;

[0032] Debug data such as Figure 3-6 As shown:

[0033] Static pressure water production: water production volume 44--60m 3 / h; average water turbidity <0.5NTU;

[0034] Pumping water production: water production volume 100--130m 3 / h; average water turbidity <0.5NTU;

[0035] Backflush and drain mud once every 6-8 hours.

[0036] The present invention is mainly driven by gravity flow and can operate at ultra-low pressure and high throughput, effectively reducing the energy consumption of water production; eliminating the chemical dosing process and simplifying the physical process, avoiding secondary pollution caused by chemical agents. Since no coagulant is added, the bottom sludge is discharged smoothly and the sludge accumulation commonly seen in general sedimentation tanks will not occur; and there is a high concentration of suspended sediment in the membrane sedimentation channel 3, which has a good removal effect on micro-polluting organic matter; the equipment integration is significantly improved, reducing the water consumption for sludge discharge and improving water production efficiency, which can ensure the water quality of produced water and shorten the treatment process, realize unmanned operation and reduce labor costs.

[0037] The technical solutions provided by the embodiments of the present invention are introduced in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the embodiments of the present invention. The description of the above embodiments is only intended to help understand the principles of the embodiments of the present invention.

Claims

1. A new type of high turbidity surface water treatment system, comprising an equipment room (1), a clear water tank (2), a membrane rack Pool and membrane sedimentation channel (3), characterized by: One side of the membrane sedimentation channel (3) is connected to a water source, and the membrane sedimentation The bottom of the sedimentation channel (3) is in a 5° slope shape. A membrane frame pool and an equipment room (1) are provided on the other side of the membrane sedimentation channel (3). The membrane sedimentation channel (3) and the clear water pool (2) are connected through a pipeline. Gate valves (4) are provided at both ends of the membrane sedimentation channel (3). A water retaining wall (5) is provided on one side of one of the gate valves (4). A mud flushing hole (6) is provided at the bottom of the water retaining wall (5). A high-flux membrane is provided inside the membrane sedimentation channel (3) through a membrane frame. A backwash fan (7), a drug storage tank (8), a dosing pump (9) and an electric control cabinet (10) are provided inside the equipment room (1), and the electric control cabinet (10) is electrically connected to the backwash fan (7) and the dosing pump (9); the backwash fan (7) is connected to the membrane precipitation channel (3) through a pipeline, and the dosing pump (9) is connected to the drug storage tank (8) and the membrane precipitation channel (3) through a pipeline; a hollow cavity is provided in the middle of the high-flux membrane, and the hollow cavity is connected to a negative pressure pump through a membrane frame. The negative pressure pump is provided inside the clear water tank (2), and the negative pressure pump is electrically connected to the electric control cabinet (10).

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