Ultrafiltration buffer system

Abstract

The utility model relates to the technical field of filtration, in particular to an ultrafiltration buffer system which comprises a buffer tank, and a spraying ball is arranged at the top of the inner side of the buffer tank; the first liquid inlet pipe is connected to the buffer tank; the second liquid inlet pipe is connected to the buffer tank; one end of the liquid outlet pipe is connected with the bottom of the buffer tank, and the other end of the liquid outlet pipe is connected with an ultrafiltration system; one end of the return pipe is communicated with the bottom of the buffer tank, the other end of the return pipe is connected with the spraying ball, a liquid inlet nozzle is mounted on the return pipe, and the liquid inlet nozzle is used for being connected with an ultrafiltration system; the alkali liquor preparation pipe is connected to the buffer tank; the cleaning water return pipe is connected with the bottom of the buffer tank, and the cleaning water return pipe is connected with an ultrafiltration system. By arranging the alkali liquor preparation pipe, the backflow pipe and the second liquid inlet pipe, self-cleaning of the buffer tank can be achieved, the buffer tank does not need to be manually cleaned, and manpower is effectively saved.

Description

Technical Field

[0001] This application relates to the field of filtration technology, and particularly to an ultrafiltration buffer system. Background Art

[0002] Ultrafiltration technology, as an efficient membrane separation method, has been widely used in fields such as water treatment, food processing, and biopharmaceuticals. During the ultrafiltration process, in order to cope with fluctuations in the influent water volume and quality, a buffer tank is usually required to stabilize the system operation.

[0003] In an ultrafiltration system, the buffer tank is an important component, and its cleaning and maintenance issues have always been the main challenges faced by the industry. Traditional ultrafiltration buffer tanks often neglect the convenience of cleaning and maintenance in design, resulting in many problems during long-term operation:

[0004] Firstly, the internal structure of a conventional buffer tank is simple and lacks a self-cleaning mechanism. Dirt, sediment, and biofilms are likely to accumulate on the inner wall and bottom of the tank, which not only affects the effluent water quality but may also become a breeding ground for microorganisms. Secondly, the design of the cleaning ports is often unreasonable, with insufficient quantity or improper position, making it difficult to thoroughly clean manually. Especially in large buffer tanks, it is difficult for cleaning personnel to reach all internal areas, leaving cleaning dead spots. In addition, many buffer tanks lack an effective sewage discharge device, making it difficult to discharge the sewage in a timely manner during the cleaning process and affecting the cleaning effect.

[0005] More importantly, the cleaning of traditional buffer tanks usually requires shutdown operations, which directly affects production efficiency and increases operating costs. For some continuously operating industrial processes, frequent shutdowns for cleaning are even more unacceptable. Summary of the Invention

[0006] This application aims to at least partly solve one of the above technical problems in the prior art. To this end, an embodiment of this application provides an ultrafiltration buffer system that can achieve self-cleaning of the buffer tank, eliminating the need for manual cleaning of the buffer tank and effectively saving labor.

[0007] An ultrafiltration buffer system includes:

[0008] A buffer tank, with a spray ball provided at the top inside the buffer tank;

[0009] A first inlet pipe connected to the buffer tank;

[0010] A second inlet pipe connected to the buffer tank;

[0011] An outlet pipe, one end of which is connected to the bottom of the buffer tank and the other end is used to connect to an ultrafiltration system;

[0012] A reflux pipe, one end of the reflux pipe communicates with the bottom of the buffer tank, the other end is connected to the spray ball, and a liquid inlet nozzle is installed on the reflux pipe, and the liquid inlet nozzle is used to connect to the ultrafiltration system;

[0013] An alkali solution preparation pipe, the alkali solution preparation pipe is connected to the buffer tank;

[0014] A cleaning return pipe, the cleaning return pipe is connected to the reflux pipe through a first connecting pipe, and the cleaning return pipe is connected to the ultrafiltration system.

[0015] In an optional or preferred embodiment, the first liquid inlet pipe communicates with the reflux pipe through a second connecting pipe, and the second liquid inlet pipe is connected to the second connecting pipe.

[0016] In an optional or preferred embodiment, a magnetic stirrer is installed at the bottom of the buffer tank.

[0017] In an optional or preferred embodiment, a heating device is installed on the buffer tank. The heating device includes a sandwich surrounding the buffer tank, a first temperature control pipe and a second temperature control pipe. The first temperature control pipe is connected to the bottom of the sandwich, and the second temperature control pipe is connected to the top of the sandwich.

[0018] In an optional or preferred embodiment, the ultrafiltration buffer system further includes a ventilation pipe, the ventilation pipe is connected to the buffer tank, and a compressed air pipe and an exhaust pipe are connected to the ventilation pipe.

[0019] In an optional or preferred embodiment, a plurality of gas filters are connected in series on the ventilation pipe.

[0020] In an optional or preferred embodiment, a liquid filter is installed on the alkali solution preparation pipe.

[0021] In an optional or preferred embodiment, a conductivity sensor is installed on the cleaning return pipe.

[0022] In an optional or preferred embodiment, the ultrafiltration buffer system further includes a condensate drain pipe, and the condensate drain pipe is connected to the first connecting pipe through a third connecting pipe.

[0023] In an optional or preferred embodiment, the ultrafiltration buffer system further includes a sewage drain pipe, the cleaning return pipe is connected to the sewage drain pipe, and the ultrafiltration system is connected to the sewage drain pipe.

[0024] Based on the above technical solution, the embodiments of the present application have at least the following beneficial effects: In the above technical solution, when ultrafiltration work needs to be carried out, the production feed liquid enters the buffer tank through the first liquid inlet pipe, and then flows out through the liquid outlet pipe and passes through the ultrafiltration system for ultrafiltration work. When cleaning is required, the clean water passes through the second liquid inlet pipe and is sprayed inside the buffer tank through the spray ball to initially clean the buffer tank. The water after cleaning will pass through the return pipe and then be discharged from the cleaning return pipe. Alkali liquid is introduced into the buffer tank through the alkali liquid preparation pipe, and clean water is introduced into the buffer tank through the second liquid inlet pipe. The clean water and the alkali liquid are mixed in the buffer tank to form an alkaline cleaning liquid. The alkaline cleaning liquid flows out through the liquid outlet pipe, passes through the ultrafiltration system, and then flows back into the return pipe from the liquid inlet nozzle, and is sprayed from the spray ball into the buffer tank through the return pipe, so as to deeply clean the inside of the buffer tank with the alkaline cleaning liquid. The alkaline cleaning liquid after cleaning is discharged from the cleaning return pipe through the return pipe and the first connecting pipe. The present application can realize self-cleaning of the buffer tank, eliminating the need for manual cleaning of the buffer tank and effectively saving manpower. Description of the Drawings

[0025] The following further describes the present application in conjunction with the drawings and embodiments;

[0026] Figure 1 It is a schematic structural diagram of the ultrafiltration buffer system provided by the embodiments of the present application. Detailed Embodiments

[0027] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0028] The following further describes the implementation manners of the present application in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present application, but cannot be used to limit the scope of the present application.

[0029] In the description of the embodiments of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the embodiments of the present application. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0030] In the description of the embodiments of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0031] In the embodiments of the present application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower horizontal height than the second feature.

[0032] Ultrafiltration technology, as an efficient membrane separation method, has been widely used in the fields of water treatment, food processing, biopharmaceuticals, etc. During the ultrafiltration process, in order to cope with the fluctuations in the influent water volume and quality, it is usually necessary to use a buffer tank to stabilize the system operation.

[0033] In the ultrafiltration system, as an important component, the cleaning and maintenance of the buffer tank have always been the main challenges faced by the industry. Traditional ultrafiltration buffer tanks often neglect the convenience of cleaning and maintenance in design, resulting in many problems during long-term operation:

[0034] Currently, the internal structure of a conventional buffer tank is simple and lacks a self-cleaning mechanism. Dirt, sediment, and biofilms are likely to accumulate on the inner wall and bottom of the tank, which not only affects the quality of the effluent but may also become a breeding ground for microorganisms. Manual cleaning is usually required, but the design of the cleaning ports is often unreasonable, with insufficient quantity or improper location, making it difficult to thoroughly clean manually and resulting in a high cost for manual cleaning. Especially in large buffer tanks, it is difficult for cleaning personnel to reach all internal areas, leaving cleaning dead spots.

[0035] Referring to Figure 1 , this application provides an ultrafiltration buffer system, including a buffer tank 1, a first liquid inlet pipe 2, a second liquid inlet pipe 3, a liquid outlet pipe 4, a return pipe 5, an alkali solution preparation pipe 6, and a cleaning return water pipe 7.

[0036] A spray ball 8 is arranged at the inner top of the buffer tank 1. The first liquid inlet pipe 2 is connected to the buffer tank 1, the second liquid inlet pipe 3 is connected to the buffer tank 1, one end of the liquid outlet pipe 4 is connected to the bottom of the buffer tank 1, and the other end is used to connect to the ultrafiltration system. One end of the return pipe 5 communicates with the bottom of the buffer tank 1, and the other end is connected to the spray ball 8. A liquid inlet nozzle 9 is installed on the return pipe 5, and the liquid inlet nozzle 9 is used to communicate with the ultrafiltration system. The alkali solution preparation pipe 6 is connected to the buffer tank 1, and the cleaning return water pipe 7 is connected to the return pipe 5 through a first connecting pipe 21, and the cleaning return water pipe 7 is connected to the ultrafiltration system.

[0037] When ultrafiltration work needs to be carried out, the production feed liquid enters the buffer tank 1 through the first liquid inlet pipe 2 and then flows out from the liquid outlet pipe 4 to undergo ultrafiltration work through the ultrafiltration system. When cleaning is required, clean water passes through the second liquid inlet pipe 3 and is sprayed inside the buffer tank 1 through the spray ball 8 to conduct a primary cleaning of the buffer tank 1. During the cleaning process, the water will pass through the return pipe 5 and then be discharged from the cleaning return water pipe 7. Alkali solution is introduced into the buffer tank 1 through the alkali solution preparation pipe 6, and clean water is introduced into the buffer tank 1 through the second liquid inlet pipe 3. The clean water and the alkali solution are mixed inside the buffer tank 1 to form an alkaline cleaning solution. The alkaline cleaning solution flows out from the liquid outlet pipe 4 and enters the ultrafiltration system, and then returns to the return pipe 5 from the liquid inlet nozzle 9, and is sprayed onto the inside of the buffer tank 1 from the spray ball 8 through the return pipe 5, so as to conduct a deep cleaning of the inside of the buffer tank 1 with the alkaline cleaning solution. The used alkaline cleaning solution is discharged from the cleaning return water pipe 7 after passing through the return pipe 5 and the first connecting pipe 21. This application can achieve self-cleaning of the buffer tank 1 without the need for manual cleaning of the buffer tank 1, effectively saving manpower.

[0038] In order to monitor the cleaning situation, in some embodiments, a conductivity sensor 10 is installed on the cleaning return water pipe 7, and the conductivity of the discharged water is monitored through the conductivity sensor 10 to determine the cleaning status.

[0039] In some embodiments, the first liquid inlet pipe 2 and the reflux pipe 5 are connected and communicated through a second connecting pipe 11, and the second liquid inlet pipe 3 is connected to the second connecting pipe 11. When ultrafiltration work needs to be carried out, the production feed liquid can directly enter the buffer tank 1 through the first liquid inlet pipe 2, or can enter the buffer tank 1 through the first liquid inlet pipe 2 and the second connecting pipe 11 and then through the spray ball 8. In this way, the way for the production feed liquid to enter the buffer tank 1 is more diversified. The production feed liquid is sprayed more evenly during the process of entering the buffer tank 1 through the spray ball 8.

[0040] In some embodiments, a magnetic stirrer 12 is installed at the bottom of the buffer tank 1. During the preparation process of the alkaline cleaning solution, starting the magnetic stirrer 12 for stirring can make the preparation of the alkaline cleaning solution more uniform.

[0041] In some embodiments, a heating device 13 is installed on the buffer tank 1. When it is necessary to heat the production feed liquid, heating the buffer tank 1 through the heating device 13 can increase the temperature of the production feed liquid.

[0042] Specifically, the heating device 13 includes a sandwich layer 130 surrounding the buffer tank 1, a first temperature control pipe 131 and a second temperature control pipe 132. The first temperature control pipe 131 is connected to the bottom of the sandwich layer 130, and the second temperature control pipe 132 is connected to the top of the sandwich layer 130. During the heating process, hot water enters the sandwich layer 130 from the first temperature control pipe 131, exchanges heat with the buffer tank 1, and then flows out from the second temperature control pipe 132.

[0043] In some embodiments, the ultrafiltration buffer system further includes a ventilation pipe 14. The ventilation pipe 14 is connected to the buffer tank 1, and a compressed air pipe 15 and an exhaust pipe 16 are connected to the ventilation pipe 14.

[0044] When it is necessary to inflate and pressurize the inside of the buffer tank 1 and the ultrafiltration system, compressed air is introduced into the compressed air pipe 15. The compressed air enters the inside of the buffer tank 1 after passing through the compressed air pipe 15 and the ventilation pipe 14, and then enters the ultrafiltration system through the liquid outlet pipe 4. After the pressure inside the buffer tank 1 and the ultrafiltration system is stable, the compressed air pipe 15 is closed. At this time, the inside of the buffer tank 1 and the ultrafiltration system can be pressurized. When it is necessary to release the pressure, the gas can be directly discharged through the exhaust pipe 16.

[0045] In addition, when it is necessary to perform high-temperature sterilization on the buffer tank 1, the liquid outlet pipe 4 and the ultrafiltration system, high-temperature steam can be introduced from the compressed air pipe 15. The steam enters the buffer tank 1 through the ventilation pipe 14 and then flows out from the liquid outlet pipe 4 and enters the ultrafiltration system, so as to perform high-temperature sterilization on the buffer tank 1, the liquid outlet pipe 4 and the ultrafiltration system.

[0046] In some embodiments, a plurality of gas filters 17 are connected in series on the ventilation pipe 14. The gas filters 17 are used to filter the compressed air to reduce the pollutants carried in the air from entering the buffer tank 1 or the ultrafiltration system.

[0047] In some embodiments, a liquid filter 18 is installed on the lye preparation pipe 6. It is used to filter the incoming lye.

[0048] In some embodiments, the ultrafiltration buffer system further includes a condensate drain pipe 19. The condensate drain pipe 19 is connected to the first connecting pipe 21 through a third connecting pipe 22. After the buffer tank 1 is sterilized by high-temperature steam, the condensate in the buffer tank 1 will be discharged from the condensate drain pipe 19 after passing through the return pipe 5, the first connecting pipe 21, and the third connecting pipe 22.

[0049] In some embodiments, the ultrafiltration buffer system further includes a sewage drain pipe 20. The cleaning return pipe 7 is connected to the sewage drain pipe 20, and the ultrafiltration system is connected to the sewage drain pipe 20. The water in the cleaning return pipe 7 and the water after the ultrafiltration system is cleaned can be discharged through the sewage drain pipe 20.

[0050] In the description of this specification, the descriptions with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, without conflict, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0051] The above has described the embodiments of the present application in detail with reference to the drawings, but the present application is not limited to the above embodiments. Within the scope of knowledge possessed by those of ordinary skill in the art in the technical field, various changes can be made without departing from the purpose of the present application.

Claims

1. An ultrafiltration buffer system, characterized in that: include: A buffer tank, wherein a spray ball is arranged on the inner top of the buffer tank; a first liquid inlet pipe, the first liquid inlet pipe being connected to the buffer tank; a second liquid inlet pipe, the second liquid inlet pipe being connected to the buffer tank; A liquid outlet pipe, one end of which is connected to the bottom of the buffer tank, and the other end of which is used to connect to the ultrafiltration system; A reflux pipe, one end of which is connected to the bottom of the buffer tank, and the other end of which is connected to the spray ball. A liquid inlet nozzle is installed on the reflux pipe, and the liquid inlet nozzle is used to connect to the ultrafiltration system; an alkali solution preparation pipe connected to the buffer tank; A cleaning water return pipe is connected to the reflux pipe through a first connecting pipe, and the cleaning water return pipe is connected to an ultrafiltration system.

2. The ultrafiltration buffer system according to claim 1, characterized in that: The first liquid inlet pipe is communicated with the reflux pipe through a second connecting pipe, and the second liquid inlet pipe is connected to the second connecting pipe.

3. The ultrafiltration buffer system according to claim 1, characterized in that: A magnetic stirrer is installed at the bottom of the buffer tank.

4. The ultrafiltration buffer system according to claim 1, characterized in that: A heating device is installed on the buffer tank, and the heating device includes an interlayer surrounding the buffer tank and a first temperature control pipe and a second temperature control pipe, wherein the first temperature control pipe is connected to the bottom of the interlayer, and the second temperature control pipe is connected to the top of the interlayer.

5. The ultrafiltration buffer system according to claim 1, characterized in that: The ultrafiltration buffer system also includes a ventilation pipeline, which is connected to the buffer tank, and the ventilation pipeline is connected to a compressed air pipeline and an exhaust pipeline.

6. The ultrafiltration buffer system according to claim 5, characterized in that: A plurality of gas filters are arranged in series on the ventilation pipeline.

7. The ultrafiltration buffer system according to claim 1, characterized in that: A liquid filter is installed on the alkali solution preparation pipe.

8. The ultrafiltration buffer system according to claim 1, characterized in that: A conductivity sensor is installed on the cleaning return water pipe.

9. The ultrafiltration buffer system according to claim 1, characterized in that: The ultrafiltration buffer system further comprises a condensate discharge pipe, and the condensate discharge pipe is connected to the first connecting pipe via a third connecting pipe.

10. The ultrafiltration buffer system according to claim 1, characterized in that: The ultrafiltration buffer system also includes a sewage discharge pipe, the cleaning return pipe is connected to the sewage discharge pipe, and the ultrafiltration system is connected to the sewage discharge pipe.

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