Ultrafiltration broken wire protection device

Abstract

The utility model discloses an ultrafiltration broken wire protection device, which comprises an ultrafiltration unit formed by a plurality of ultrafiltration membranes, a water inlet pipeline, a backwashing air-entrapping component and a water outlet pipeline, the water inlet pipeline is connected with the bottom of the ultrafiltration unit, and the water outlet pipeline is connected with the top of the ultrafiltration unit. The backwashing gas filling assembly comprises a gas inlet pipeline, a gas storage tank, a pressure reducing valve, a second pressure transmitter and a gas inlet valve, the gas storage tank, the pressure reducing valve, the second pressure transmitter and the gas inlet valve are arranged on the gas inlet pipeline, the gas inlet pipeline is further connected with an electric valve, the electric valve is electrically connected with the second pressure transmitter, and the gas inlet valve is located on one side of the second pressure transmitter. The second pressure transmitter is arranged on the gas inlet pipeline, the electrically operated valve is further connected to the gas inlet pipeline, and the electrically operated valve is electrically connected with the second pressure transmitter, so that the pressure in the gas inlet pipeline can be kept at 0.1 MPa and then is conveyed into the ultrafiltration unit to perform gas washing on the ultrafiltration membrane; therefore, the ultrafiltration membrane cannot be damaged due to excessive pressure of the gas, and the ultrafiltration membrane is protected.

Description

Technical Field

[0001] The utility model relates to the technical field of ultrapure water treatment systems, in particular to an ultrafiltration broken wire protection device. Background Art

[0002] In recent years, ultrafiltration has played an increasingly important role in surface water purification, water reuse, zero wastewater discharge, and desalination water treatment processes. Ultrafiltration membranes are essential in ultrafiltration treatment systems. They can intercept particles larger than 10nm and remove organic matter and other pollutants. Ultrafiltration can also reduce the SDI value of seawater and wastewater to below 1.0, effectively eliminating pathogens and microorganisms in the water.

[0003] The working principle of hollow fiber ultrafiltration membrane is mainly based on filtration. The filtration accuracy is within the range of 0.005-0.1μm. When working, it uses asymmetric microporous structure and semi-permeable membrane medium, relying on the pressure difference on both sides of the membrane as the driving force to filter in a cross-flow manner, so that water flows into the membrane assembly and impurities are filtered outside the membrane assembly. Hollow fiber ultrafiltration membrane can effectively remove impurities such as particles, high molecular organic matter, colloids and bacterial mats in water, but it is more prone to clogging. Therefore, the ultrafiltration membrane needs to be cleaned regularly. Cleaning methods can be roughly divided into physical cleaning, chemical cleaning and backwashing, etc., which can effectively extend the service life of the membrane assembly.

[0004] In the existing technology, when backwashing, the ultrafiltration membrane needs to be scrubbed with compressed air alone or with a mixture of air and water. Because the membrane filaments of the ultrafiltration membrane can withstand very low pressure and the backwash air inlet pressure is less than 0.1 MPa, the compressed air inlet pressure is often not well controlled, resulting in the membrane filaments being broken and the entire membrane assembly being directly scrapped. Utility Model Content

[0005] Based on this, it is necessary to provide an ultrafiltration membrane wire breakage protection device in which the membrane wire is not easily broken.

[0006] The technical solution adopted by the utility model to solve its technical problems is: an ultrafiltration broken wire protection device, the ultrafiltration broken wire protection device includes an ultrafiltration unit composed of multiple ultrafiltration membranes and an inlet pipe, a backwashing aeration component and a water outlet pipe connected to the ultrafiltration unit, the water inlet pipe is connected to the bottom of the ultrafiltration unit, the water outlet pipe is connected to the top of the ultrafiltration unit, the backwashing aeration component includes an air inlet pipe connected to the bottom of the ultrafiltration membrane and an air storage tank, a pressure reducing valve, a second pressure transmitter and an air inlet valve arranged on the air inlet pipe, the air inlet pipe is also connected to an electric valve, the electric valve is electrically connected to the second pressure transmitter, and the air inlet valve is located on one side of the second pressure transmitter.

[0007] Furthermore, the intake pipe includes an intake main pipe and an intake branch pipe, one end of the intake branch pipe is fixedly connected to the intake main pipe, and the other end of the intake branch pipe is fixedly connected to the bottom of the ultrafiltration membrane, and the gas storage tank, the pressure reducing valve, the second pressure transmitter, the electric valve and the intake valve are all arranged on the intake main pipe.

[0008] Furthermore, the water inlet pipeline includes a water inlet main pipe and multiple water inlet branch pipes, one end of the water inlet branch pipe is fixedly connected to the water inlet main pipe, and the other end of the water inlet branch pipe is fixedly connected to the lower end of the ultrafiltration membrane.

[0009] Furthermore, the water outlet pipe includes a main water outlet pipe and a plurality of branch water outlet pipes, one end of each branch water outlet pipe is connected to the upper end of the ultrafiltration membrane, and the other end of each branch water outlet pipe is connected to the main water outlet pipe.

[0010] Furthermore, the ultrafiltration broken wire protection device also includes a backwash water adding assembly, which includes a backwash water inlet pipe, a backwash upper discharge pipe and a backwash lower discharge pipe. The backwash water inlet pipe is connected to the ultrafiltration membrane unit, the backwash upper discharge pipe is arranged on the backwash water inlet pipe, and the backwash lower discharge pipe is arranged on the water inlet pipe.

[0011] Furthermore, the backwash water inlet pipe includes a backwash water inlet main pipe and multiple backwash water inlet branches, one end of the backwash water inlet branch pipe is fixedly connected to the backwash water inlet main pipe, and the other end of the backwash water inlet branch pipe is fixedly connected to the upper end of the ultrafiltration membrane, the backwash upper discharge pipe is arranged on the backwash water inlet main pipe, and the backwash lower discharge pipe is arranged on the water inlet main pipe.

[0012] Furthermore, the ultrafiltration broken wire protection device also includes a chemical cleaning component, which includes a dosing water inlet pipe and a dosing water return pipe. The dosing water inlet pipe is connected and communicated with the water inlet main pipe, and the dosing water return pipe is connected and communicated with the backwash water inlet main pipe.

[0013] Furthermore, a water inlet valve is provided on the water inlet main pipe, and the water inlet valve is used to control the on-off of the water inlet main pipe.

[0014] Furthermore, the water inlet main pipe is also connected to a first pressure transmitter, which reduces the pressure in the water inlet main pipe.

[0015] The beneficial effect of the present invention is that the ultrafiltration broken wire protection device provided by the present invention provides a second pressure transmitter on the air intake pipe, and the air intake pipe is also connected to an electric valve, which is electrically connected to the second pressure transmitter, so that the pressure in the air intake pipe can be maintained at 0.1MPa before being transported to the ultrafiltration unit to perform air washing on the ultrafiltration membrane, thereby preventing the ultrafiltration membrane from being damaged due to excessive gas pressure, thereby protecting the ultrafiltration membrane. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 It is a structural diagram of the ultrafiltration broken wire protection device of the utility model.

[0018] The names and numbers of the parts in the figure are: 1. Ultrafiltration unit; 2. Water inlet pipe; 2. Water inlet main pipe; 22. Water inlet branch pipe; 23. Water inlet valve; 24. First pressure transmitter; 3. Backwash water adding assembly; 31. Backwash water inlet pipe; 311. Backwash water inlet main pipe; 312. Backwash water inlet branch pipe; 32. Backwash upper discharge pipe; 33. Backwash lower discharge pipe; 4. Backwash aeration assembly; 41. Air inlet pipe; 411. Air inlet main pipe; 412. Air inlet branch pipe; 42. Air storage tank; 43. Pressure reducing valve; 44. Second pressure transmitter; 45. Electric valve; 46. Air inlet valve; 5. Chemical cleaning assembly; 51. Dosing water inlet pipe; 52. Dosing return pipe; 6. Water outlet pipe; 61. Water outlet main pipe; 62. Water outlet branch pipe. DETAILED DESCRIPTION

[0019] The present invention will now be described in detail with reference to the accompanying drawings. This drawing is a simplified schematic diagram, which only illustrates the basic structure of the present invention in a schematic manner, and therefore only shows the components related to the present invention.

[0020] See also Figure 1 The utility model provides an ultrafiltration broken wire protection device, which includes an ultrafiltration unit 1, a water inlet pipe 2, a backwash water adding component 3, a backwash aeration component 4, a chemical cleaning component 5 and a water outlet pipe 6. The water inlet pipe 2, the backwash water adding component 3, the backwash aeration component 4, the chemical cleaning component 5 and the water outlet pipe 6 are all connected to the ultrafiltration unit 1, the water inlet pipe 2 is connected to the bottom of the ultrafiltration unit 1, and the water outlet pipe 6 is connected to the top of the ultrafiltration unit 1.

[0021] The ultrafiltration unit 1 is composed of a plurality of ultrafiltration membranes, and the ultrafiltration membrane is formed by integrating a plurality of fine membrane filaments.

[0022] The water inlet pipe 2 includes a main water inlet pipe 21 and a branch water inlet pipe 22. One end of the branch water inlet pipe 22 is fixedly connected to the main water inlet pipe 21, and the other end of the branch water inlet pipe 22 is fixedly connected to the lower end of the ultrafiltration membrane. Furthermore, there are multiple branch water inlet pipes 22, and the number of branch water inlet pipes 22 is the same as the number of ultrafiltration membranes, with one branch water inlet pipe 22 corresponding to one ultrafiltration membrane. In this embodiment, the water inlet pipe 2 is a DN250 pipe. During use, raw water enters the main water inlet pipe 21, enters the branch water inlet pipe 22, and then enters the ultrafiltration unit 1, where the raw water is filtered and processed.

[0023] The water inlet main pipe 21 is provided with a water inlet valve 23 for controlling the on-off of the water inlet main pipe 21. The water inlet main pipe 21 is also connected to a first pressure transmitter 24, which can reduce the pressure in the water inlet main pipe 21.

[0024] The backwash water adding assembly 3 includes a backwash water inlet pipe 31, a backwash upper discharge pipe 32 and a backwash lower discharge pipe 33. The backwash water inlet pipe 31 is connected to the ultrafiltration membrane unit 1, the backwash upper discharge pipe 32 is arranged on the backwash water inlet pipe 31, and the backwash lower discharge pipe 33 is arranged on the water inlet pipe 2.

[0025] The backwash water inlet pipe 31 includes a backwash water inlet main pipe 311 and a backwash water inlet branch pipe 312. One end of the backwash water inlet branch pipe 312 is fixedly connected to the backwash water inlet main pipe 311, and the other end of the backwash water inlet branch pipe 312 is fixedly connected to the upper end of the ultrafiltration membrane. The backwash upper discharge pipe 32 is disposed on the backwash water inlet main pipe 311, and the backwash lower discharge pipe 33 is disposed on the water inlet main pipe 21. Furthermore, there are multiple backwash water inlet branch pipes 312, and the number of backwash water inlet branch pipes 312 is the same as the number of ultrafiltration membranes, with one backwash water inlet branch pipe 312 corresponding to each ultrafiltration membrane. In this embodiment, the backwash water inlet pipe 31, the backwash upper discharge pipe 32, and the backwash lower discharge pipe 33 are all DN300 pipes. During use, water enters the ultrafiltration membrane through the backwash water inlet main pipe 311 and the backwash water inlet branch pipe 312 to clean the ultrafiltration membrane. The cleaned sewage and dirt are discharged into the ditch through the backwash upper discharge pipe 32 and the backwash lower discharge pipe 33.

[0026] The backwash aeration assembly 4 includes an air inlet pipe 41, an air storage tank 42, a pressure reducing valve 43, and a second pressure transmitter 44. The air inlet pipe 41 is connected to the ultrafiltration unit 1. The air storage tank 42, the pressure reducing valve 43, and the second pressure transmitter 44 are all arranged on the air inlet pipe 41. The pressure reducing valve 43 is used to reduce the pressure at the outlet of the air storage tank 42, and the second pressure transmitter 44 is used to detect the pressure on the air inlet pipe 41. Furthermore, an electric valve 45 is connected to the air inlet pipe 41. The electric valve 45 is electrically connected to the second pressure transmitter 44 and is used to control the opening or stopping of the second pressure transmitter 44. Before backwashing, the pressure on the second pressure transmitter 44 is first tested. When the pressure on the second pressure transmitter 44 exceeds 0.1 MPa, the electric valve 45 is activated, and the second pressure transmitter 44 begins to operate. The second pressure transmitter 44 reduces the pressure in the air inlet pipe 41 to 0.1 MPa. The electric valve 45 is then closed, and the second pressure transmitter 44 stops operating. If the pressure on the second pressure transmitter 44 fails to drop for a long time after the electric valve 45 is opened, it is confirmed that the pressure reducing valve 43 is faulty, an alarm is issued, and the next process is terminated, thereby ensuring the safety of the ultrafiltration membrane.

[0027] Furthermore, the backwash aeration assembly 4 also includes an air inlet valve 46, which is disposed on the air inlet pipe 41 and located on one side of the second pressure transmitter 44. The air inlet valve 46 is used to control the on / off state of the air inlet pipe 41. During operation, the gas in the air storage tank 42 is decompressed to 0.1 MPa by the pressure reducing valve 43 and then delivered to the air inlet pipe 41. After the second pressure transmitter 44 detects that the pressure in the air inlet pipe 41 is 0.1 MPa, the air inlet valve 46 is activated, and the gas is again delivered to the ultrafiltration unit 1, thereby air-washing the ultrafiltration membrane.

[0028] Furthermore, the air intake pipe 41 includes an air intake main pipe 411 and an air intake branch pipe 412, one end of the air intake branch pipe 412 is fixedly connected to the air intake main pipe 411, and the other end of the air intake branch pipe 412 is fixedly connected to the bottom of the ultrafiltration membrane, and the air storage tank 42, the pressure reducing valve 43, the second pressure transmitter 44, the electric valve 45 and the air intake valve 46 are all arranged on the air intake main pipe 411.

[0029] The chemical cleaning assembly 5 includes a dosing water inlet pipe 51 and a dosing water return pipe 52. The dosing water inlet pipe 51 is connected to and communicates with the water inlet main pipe 21, while the dosing water return pipe 52 is connected to and communicates with the backwash water inlet main pipe 311. During use, chemical solution enters the ultrafiltration unit 1 through the dosing water inlet pipe 51 and the water inlet main pipe 21, cleans the ultrafiltration unit 1, and then flows out through the backwash water inlet main pipe 311 and the dosing water return pipe 52.

[0030] The water outlet pipe 6 includes a main water outlet pipe 61 and a branch water outlet pipe 62. One end of the branch water outlet pipe 62 is connected to the upper end of the ultrafiltration membrane, and the other end of the branch water outlet pipe 62 is connected to the main water outlet pipe 61. When in use, the ultrafiltered water flows into the main water outlet pipe 61 through the branch water outlet pipe 62 and then flows out of the device.

[0031] During use, the raw water enters the water inlet branch pipe 22 through the water inlet main pipe 21 and then enters the ultrafiltration unit 1, and the raw water is filtered and processed by the ultrafiltration unit 1. After the ultrafiltration unit 1 has been running continuously for a period of time, the suspended matter, colloids, organic matter, etc. intercepted by filtration will slowly accumulate on the water inlet side of the ultrafiltration membrane. The ultrafiltered water flows into the water outlet main pipe 61 through the water outlet branch pipe 62 and then flows out of the device.

[0032] When the ultrafiltration unit 1 needs to be cleaned, water first enters the ultrafiltration membrane through the backwash water inlet main pipe 311 and the backwash water inlet branch pipe 312, and cleans the ultrafiltration membrane. The cleaned sewage and dirt are discharged into the ditch through the backwash upper discharge pipe 32 and the backwash lower discharge pipe 33. Then, the medicine enters the ultrafiltration unit 1 through the dosing water inlet pipe 51 and the water inlet main pipe 21, and cleans the ultrafiltration unit 1. Then, the water is discharged from the backwash water inlet main pipe 311 and the dosing return water pipe 5 2 outflow, finally, first detect the pressure on the second pressure transmitter 44. When the pressure on the second pressure transmitter 44 is greater than 0.1 MPa, start the electric valve 45, the second pressure transmitter 44 starts to work, and the second pressure transmitter 44 reduces the pressure in the air inlet pipe 41 to 0.1 MPa. Then close the electric valve 45, the second pressure transmitter 44 stops working, and start the air inlet valve 46. The gas in the air inlet pipe 41 is transported to the ultrafiltration unit 1, so that the ultrafiltration membrane can be air-washed.

[0033] The ultrafiltration broken wire protection device provided by the present invention is configured such that a second pressure transmitter 44 is provided on the air intake pipe 41, and an electric valve 45 is also connected to the air intake pipe 41. The electric valve 45 is electrically connected to the second pressure transmitter 44, so that the pressure in the air intake pipe 41 can be maintained at 0.1 MPa before the air is transported into the ultrafiltration unit 1 to perform air washing on the ultrafiltration membrane, thereby preventing the ultrafiltration membrane from being damaged due to excessive gas pressure, thereby protecting the ultrafiltration membrane.

[0034] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the scope of the present invention. The technical scope of this utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An ultrafiltration broken wire protection device, characterized by: The ultrafiltration broken wire protection device includes an ultrafiltration unit composed of multiple ultrafiltration membranes and an inlet pipe, a backwash aeration assembly and a water outlet pipe connected to the ultrafiltration unit, the water inlet pipe is connected to the bottom of the ultrafiltration unit, and the water outlet pipe is connected to the top of the ultrafiltration unit. The backwash aeration assembly includes an inlet pipe connected to the bottom of the ultrafiltration membrane and an air storage tank, a pressure reducing valve, a second pressure transmitter and an inlet valve arranged on the inlet pipe. An electric valve is also connected to the inlet pipe, and the electric valve is electrically connected to the second pressure transmitter. The inlet valve is located on one side of the second pressure transmitter.

2. The ultrafiltration broken wire protection device according to claim 1, characterized in that: The air intake pipe includes an air intake main pipe and an air intake branch pipe, one end of the air intake branch pipe is fixedly connected to the air intake main pipe, and the other end of the air intake branch pipe is fixedly connected to the bottom of the ultrafiltration membrane, and the air storage tank, the pressure reducing valve, the second pressure transmitter, the electric valve and the air intake valve are all arranged on the air intake main pipe.

3. The ultrafiltration broken wire protection device according to claim 1, characterized in that: The water inlet pipeline includes a water inlet main pipe and a plurality of water inlet branch pipes, one end of each water inlet branch pipe is fixedly connected to the water inlet main pipe, and the other end of each water inlet branch pipe is fixedly connected to the lower end of the ultrafiltration membrane.

4. The ultrafiltration broken wire protection device according to claim 1, characterized in that: The water outlet pipeline includes a water outlet main pipe and a plurality of water outlet branch pipes, one end of each water outlet branch pipe is connected to the upper end of the ultrafiltration membrane, and the other end of each water outlet branch pipe is connected to the water outlet main pipe.

5. The ultrafiltration broken wire protection device according to claim 3, characterized in that: The ultrafiltration broken wire protection device also includes a backwash water adding assembly, which includes a backwash water inlet pipe, a backwash upper discharge pipe and a backwash lower discharge pipe. The backwash water inlet pipe is connected to the ultrafiltration membrane unit, the backwash upper discharge pipe is arranged on the backwash water inlet pipe, and the backwash lower discharge pipe is arranged on the water inlet pipe.

6. The ultrafiltration broken wire protection device according to claim 5, characterized in that: The backwash water inlet pipeline includes a backwash water inlet main pipe and multiple backwash water inlet branches, one end of the backwash water inlet branch pipe is fixedly connected to the backwash water inlet main pipe, and the other end of the backwash water inlet branch pipe is fixedly connected to the upper end of the ultrafiltration membrane, the backwash upper discharge pipe is arranged on the backwash water inlet main pipe, and the backwash lower discharge pipe is arranged on the water inlet main pipe.

7. The ultrafiltration broken wire protection device according to claim 6, characterized in that: The ultrafiltration broken wire protection device also includes a chemical cleaning component, which includes a dosing water inlet pipe and a dosing water return pipe. The dosing water inlet pipe is connected and communicated with the water inlet main pipe, and the dosing water return pipe is connected and communicated with the backwash water inlet main pipe.

8. The ultrafiltration broken wire protection device according to claim 3, characterized in that: The water inlet main pipe is provided with a water inlet valve, and the water inlet valve is used to control the on-off of the water inlet main pipe.

9. The ultrafiltration broken wire protection device according to claim 3, characterized in that: The water inlet main pipe is also connected to a first pressure transmitter, which reduces the pressure in the water inlet main pipe.

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