Ultrafiltration system protection device

Abstract

The utility model relates to the technical field of ultrafiltration systems, in particular to an ultrafiltration system protection device which comprises an ultrafiltration membrane, a first metal braided hose connected with the ultrafiltration membrane and a second metal braided hose connected with the ultrafiltration membrane, a water inlet adjusting valve is fixedly arranged on the first metal braided hose through a connecting valve, and a water outlet adjusting valve is fixedly arranged on the second metal braided hose through a connecting valve. A chemical washing water inlet regulating valve is fixedly arranged on the first metal braided hose through a connecting valve, a chemical washing water production backflow regulating valve is fixedly arranged on the second metal braided hose through a connecting valve, and a backwashing water inlet regulating valve is fixedly arranged on the second metal braided hose through a connecting valve; and a pressure transmitter is fixedly arranged on the first metal braided hose through a connecting valve. According to the utility model, the water inlet regulating valve and the backwashing water inlet regulating valve of the ultrafiltration membrane are connected through the first metal braided hose and the second metal braided hose, so that the vibration of pipelines and valves in the processes of normal operation, conventional washing, gas washing, backwashing and chemical cleaning of ultrafiltration is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of ultrafiltration systems, and in particular to an ultrafiltration system protection device. Background Art

[0002] Ultrafiltration is a screening process related to the membrane pore size. It is a membrane separation technology that uses the pressure difference on both sides of the membrane as the driving force and ultrafiltration membrane as the filtration medium. The typical pore size of the ultrafiltration membrane is between 0.005 and 0.1 microns, and the retention molecular weight is about 1000 to 500,000 Daltons. It has a very high interception effect on organic pollutants, colloidal pollutants, suspended pollutants, bacteria and most viruses in raw water.

[0003] Under a certain pressure, when the raw liquid flows through the membrane surface, the many tiny micropores densely distributed on the surface of the ultrafiltration membrane only allow water and small molecules to pass through and become permeate, while the substances in the raw liquid whose volume is larger than the micropore diameter of the membrane surface are retained on the liquid inlet side of the membrane and become concentrated liquid, thereby achieving the purpose of purifying, separating and concentrating the raw liquid.

[0004] During the filtration process, the membrane needs to be cleaned regularly to avoid clogging of the membrane pores; ultrafiltration cleaning methods include forward washing, air washing, backwashing and chemical cleaning, among which forward washing, air washing and backwashing can remove the filter cake layer on the membrane surface, and chemical cleaning uses chemical agents to remove the fouling formed on the surface and inside of the ultrafiltration membrane by colloids, organic matter, inorganic salts, etc.

[0005] The original design of the water inlet pipes of some ultrafiltration systems are all made of PVC, and the operating valves are all fully open or fully closed pneumatic butterfly valves. During daily operation, the ultrafiltration pipelines vibrate greatly, resulting in frequent leakage at the pipeline flanges and tees, which requires shutdown and maintenance, affecting the water treatment volume of the reclaimed water reuse system. At the same time, the original design did not have an ultrafiltration backwash inlet pressure interlock protection system. If the air source pressure increases abnormally, it will cause the ultrafiltration membrane fibers to break, thus affecting the ultrafiltration filtration effect. Utility Model Content

[0006] In order to solve the above technical problems or at least partially solve the above technical problems, the present application provides an ultrafiltration system protection device to solve the problems of large vibration of the ultrafiltration pipeline and breakage of ultrafiltration membrane fibers.

[0007] An embodiment of the present application provides an ultrafiltration system protection device, including an ultrafiltration membrane, a first metal braided hose connected to the ultrafiltration membrane, and a second metal braided hose connected to the ultrafiltration membrane, wherein the first metal braided hose is fixedly provided with an inlet regulating valve at the inlet of ultrafiltration water via a connecting valve, and the first metal braided hose is fixedly provided with a chemical washing water inlet regulating valve at the inlet of chemical washing water via a connecting valve; the second metal braided hose is fixedly provided with a chemical washing produced water reflux regulating valve between the outlet of chemical washing return water and the ultrafiltration membrane via a connecting valve, and the second metal braided hose is fixedly provided with a backwash water inlet regulating valve at the inlet of backwash air via a connecting valve.

[0008] In some embodiments, the pressure transmitter is disposed between the backwash air inlet valve and the backwash air inlet, and the air inlet of the pressure transmitter is connected to the central control for controlling the switch of the backwash air inlet valve through a pressure interlock.

[0009] In some embodiments, the central control is provided with a pressure threshold value of 0.15MPa. When the intake pressure is ≥0.15MPa, the backwash intake valve cannot be opened, thereby protecting the membrane filaments of the ultrafiltration membrane from breaking due to excessive intake pressure.

[0010] In some embodiments, the water inlet regulating valve is controlled by a pneumatic regulating valve.

[0011] In some embodiments, the chemical washing water inlet regulating valve is controlled by a pneumatic regulating valve.

[0012] In some embodiments, the backwash water inlet regulating valve is controlled by a pneumatic regulating valve.

[0013] In some embodiments, the chemical washing water return regulating valve is controlled by a pneumatic regulating valve, thereby reducing the vibration of the corresponding pipeline during normal operation of ultrafiltration, forward washing, air washing, backwashing and chemical cleaning.

[0014] In some embodiments, a lower discharge valve is fixedly provided on the first metal braided hose between the water inlet regulating valve and the ultrafiltration membrane via a connecting valve, a backwash air inlet valve is fixedly provided on the first metal braided hose via a connecting valve, a pressure transmitter is fixedly provided on the first metal braided hose via a connecting valve, and the backwash air inlet valve is located between the ultrafiltration membrane and the pressure transmitter.

[0015] In some embodiments, a concentrate discharge valve is fixedly provided on the second metal braided hose via a connecting valve, an upper discharge valve is fixedly provided on the second metal braided hose between the concentrate discharge valve and the ultrafiltration membrane via a connecting valve, a chemical washing concentrate reflux valve is fixedly provided on the second metal braided hose via a connecting valve, the chemical washing concentrate reflux valve is connected in parallel with the ultrafiltration membrane and the chemical washing produced water reflux regulating valve, a production and discharge valve is fixedly provided on the second metal braided hose between the chemical washing produced water reflux regulating valve and the outlet of the ultrafiltration produced water via a connecting valve, and a water production valve is fixedly provided on the second metal braided hose between the production and discharge valve and the outlet of the ultrafiltration produced water via a connecting valve.

[0016] Beneficial effects of the present application: Different from the prior art, the embodiment of the present application provides an ultrafiltration system protection device, in which the water inlet regulating valve of the ultrafiltration membrane and the backwash water inlet regulating valve are connected through a first metal braided hose and a second metal braided hose to reduce the vibration of the pipelines and valves during the normal operation, forward washing, air washing, backwashing and chemical cleaning of the ultrafiltration;

[0017] The inlet and outlet water of the ultrafiltration membrane are regulated by the inlet regulating valve, chemical washing inlet regulating valve, backwashing inlet regulating valve, and chemical washing produced water return regulating valve to reduce the vibration of the pipelines and valves during the normal operation of ultrafiltration, forward washing, backwashing and chemical cleaning;

[0018] During air washing, the ultrafiltration membrane transmits the intake pressure to the central control through the pressure transmitter, which is used to control the switch of the backwash intake valve through pressure interlock. That is, when the intake pressure is ≥0.15MPa, the backwash intake valve cannot be opened, thereby protecting the ultrafiltration membrane wire from breaking due to excessive intake pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 It is a schematic diagram of the overall structure provided in the embodiment of the present application.

[0022] Figure markings: 1-first metal braided hose, 2-second metal braided hose, 3-water inlet regulating valve, 4-chemical washing water inlet regulating valve, 5-backwash water inlet regulating valve, 6-chemical washing produced water reflux regulating valve, 7-pressure transmitter, 8-lower drain valve, 9-backwash air inlet valve, 10-chemical washing concentrated water reflux valve, 11-upper drain valve, 12-concentrate drain valve, 13-water production valve, 14-production and discharge valve, 15-ultrafiltration membrane. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0024] In the following description, for the purpose of explanation rather than limitation, specific details such as specific system structures, interfaces, and technologies are provided to facilitate a thorough understanding of the present application.

[0025] The terms "first", "second", and "third" in this application are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, the features defined as "first", "second", and "third" can explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. All directional indications in the embodiments of this application (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. The terms "including" and "having" in the embodiments of this application and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or components inherent to these processes, methods, products, or devices.

[0026] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0027] The present application is described in detail below with reference to the accompanying drawings and embodiments.

[0028] See also Figure 1 , Figure 1 It is a structural schematic diagram of an ultrafiltration system protection device provided in an embodiment of the present application.

[0029] The embodiment of the present application provides an ultrafiltration system protection device. The ultrafiltration system protection device includes an ultrafiltration membrane 15, a first metal braided hose 1 connected to the ultrafiltration membrane 15, and a second metal braided hose 2 connected to the ultrafiltration membrane 15, a water inlet regulating valve 3 is fixed to the first metal braided hose 1 at the inlet of ultrafiltration water through a connecting valve, a chemical washing water inlet regulating valve 4 is fixed to the first metal braided hose 1 at the inlet of chemical washing water through a connecting valve, a lower discharge valve 8 is fixed to the first metal braided hose 1 between the water inlet regulating valve 3 and the ultrafiltration membrane 15 through a connecting valve, and a backwash valve 8 is fixed to the first metal braided hose 1 through a connecting valve. The air inlet valve 9 is fixed to the first metal braided hose 1 through a connecting valve with a pressure transmitter 7, the backwash air inlet valve 9 is located between the ultrafiltration membrane 15 and the pressure transmitter 7, the second metal braided hose 2 is fixed to a concentrated discharge valve 12 through a connecting valve, the second metal braided hose 2 is fixed to an upper discharge valve 11 through a connecting valve between the concentrated discharge valve 12 and the ultrafiltration membrane 15, the second metal braided hose 2 is fixed to a chemical washing concentrated water return valve 10 through a connecting valve, and the second metal braided hose 2 is fixed to a chemical washing produced water return valve 11 through a connecting valve between the outlet of the chemical washing return water and the ultrafiltration membrane 15. The throttle valve 6, the chemical washing concentrated water reflux valve 10 is connected in parallel with the ultrafiltration membrane 15 and the chemical washing produced water reflux regulating valve 6, the second metal braided hose 2 is fixed with a production and discharge valve 14 through a connecting valve between the chemical washing produced water reflux regulating valve 6 and the outlet of the ultrafiltration produced water, the second metal braided hose 2 is fixed with a water production valve 13 through a connecting valve at the outlet of the ultrafiltration produced water, the second metal braided hose 2 is fixed with a backwash water inlet regulating valve 5 through a connecting valve at the inlet of the backwash air intake, the pressure transmitter 7 is between the backwash air intake valve 9 and the backwash air intake, and the air inlet of the pressure transmitter 7 is connected to the middle The control connection transmits the intake pressure to the central control, and the pressure interlock is used to control the switch of the backwash intake valve 9. The central control has a pressure threshold of 0.15MPa. When the intake pressure is ≥0.15MPa, the backwash intake valve 9 cannot be opened, thereby protecting the membrane fibers of the ultrafiltration membrane 15 from breaking due to excessive intake pressure. The water inlet regulating valve 3, the chemical washing water inlet regulating valve 4, the backwash water inlet regulating valve 5, and the chemical washing produced water reflux regulating valve 6 are all controlled by pneumatic regulating valves, thereby reducing the vibration of the pipelines during normal operation of the ultrafiltration, forward washing, air washing, backwashing and chemical cleaning.

[0030] In summary, the present invention provides an ultrafiltration system protection device, which can be used to

[0031] 1. The water inlet regulating valve 3 of the ultrafiltration membrane 15 and the backwash water inlet regulating valve 5 are connected through the first metal braided hose 1 and the second metal braided hose 2 to reduce the vibration of the pipelines and valves during the normal operation of ultrafiltration, forward washing, air washing, backwashing and chemical cleaning;

[0032] 2. The water inlet and outlet of the ultrafiltration membrane 15 are regulated by replacing the pneumatic fully open or fully closed butterfly valves of the water inlet regulating valve 3, the chemical washing water inlet regulating valve 4, the backwash water inlet regulating valve 5, and the chemical washing produced water return regulating valve 6 with pneumatic regulating valves to reduce the vibration of the pipelines and valves during the normal operation of the ultrafiltration, forward washing, backwashing and chemical cleaning;

[0033] 3. During air washing, the ultrafiltration membrane 15 transmits the intake pressure to the central control through the pressure transmitter 7, and controls the switch of the backwash intake valve 9 through the pressure interlock. That is, when the intake pressure is ≥0.15MPa, the backwash intake valve 9 cannot be opened, thereby protecting the ultrafiltration membrane from being broken due to excessive intake pressure;

[0034] 4. The effluent from the ultrafiltration membrane 15 is adjusted and operated through the lower discharge valve 8, the concentrated water return valve 10, the upper discharge valve 11, the concentrated water discharge valve 12, the water production valve 13, and the production and discharge valve 14 to control the water intake and recovery rate.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An ultrafiltration system protection device, characterized in that: It includes an ultrafiltration membrane, a first metal braided hose connected to the ultrafiltration membrane, a second metal braided hose connected to the ultrafiltration membrane, and a pressure transmitter connected to the ultrafiltration membrane, wherein: A water inlet regulating valve is fixedly provided on the first metal braided hose at the inlet of ultrafiltration water through a connecting valve, and a chemical washing water inlet regulating valve is fixedly provided on the first metal braided hose at the inlet of chemical washing water through a connecting valve; A chemical washing produced water reflux regulating valve is fixedly provided on the second metal braided hose between the chemical washing return water outlet and the ultrafiltration membrane through a connecting valve, and a backwash water inlet regulating valve is fixedly provided on the second metal braided hose at the backwash air inlet inlet through a connecting valve.

2. The ultrafiltration system protection device according to claim 1, characterized in that: The pressure transmitter is arranged between the backwash air inlet valve and the backwash air inlet, and the air inlet of the pressure transmitter is connected to the central control for controlling the switch of the backwash air inlet valve through the pressure interlock.

3. The ultrafiltration system protection device according to claim 2, characterized in that: The central control is provided with a pressure threshold value, which is 0.15 MPa.

4. The ultrafiltration system protection device according to claim 1, characterized in that: The water inlet regulating valve is controlled by a pneumatic regulating valve.

5. The ultrafiltration system protection device according to claim 1, characterized in that: The chemical washing water inlet regulating valve is controlled by a pneumatic regulating valve.

6. The ultrafiltration system protection device according to claim 1, characterized in that: The backwash water inlet regulating valve is controlled by a pneumatic regulating valve.

7. The ultrafiltration system protection device according to claim 1, characterized in that: The chemical washing water return regulating valve is controlled by a pneumatic regulating valve.

8. The ultrafiltration system protection device according to claim 1, characterized in that: A lower discharge valve is fixedly provided on the first metal braided hose between the water inlet regulating valve and the ultrafiltration membrane via a connecting valve, a backwash air inlet valve is fixedly provided on the first metal braided hose via a connecting valve, a pressure transmitter is fixedly provided on the first metal braided hose via a connecting valve, and the backwash air inlet valve is located between the ultrafiltration membrane and the pressure transmitter.

9. The ultrafiltration system protection device according to claim 1, characterized in that: A concentrate discharge valve is fixedly provided on the second metal braided hose via a connecting valve, an upper discharge valve is fixedly provided on the second metal braided hose between the concentrate discharge valve and the ultrafiltration membrane via a connecting valve, a chemical washing concentrate reflux valve is fixedly provided on the second metal braided hose via a connecting valve, the chemical washing concentrate reflux valve is connected in parallel with the ultrafiltration membrane and the chemical washing produced water reflux regulating valve, a production and discharge valve is fixedly provided on the second metal braided hose between the chemical washing produced water reflux regulating valve and the outlet of the ultrafiltration produced water via a connecting valve, and a water production valve is fixedly provided on the second metal braided hose between the production and discharge valve and the outlet of the ultrafiltration produced water via a connecting valve.

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