A gas-liquid mixing filter element and a gas-liquid mixing method

Abstract

This invention discloses a gas-liquid mixing filter element and a gas-liquid mixing method, comprising an upper cover, a lower cover, a filter element shell, a central tube, and a central connector. The upper and lower covers are detachably connected to the upper and lower ends of the filter element shell, respectively. The central tube is located inside the filter element shell, and multiple hollow fiber membrane filaments are arranged circumferentially on the outer side of the central tube. The sidewalls of the hollow fiber membrane filaments have multiple small holes. This invention enables simple and quick assembly and disassembly of the gas-liquid mixing filter element, solving the problem that it is difficult for users to replace hollow fiber gas-liquid mixers when they are clogged. The filter element of this invention is highly integrated, small in size, and occupies little space, effectively reducing the size of equipment using the gas-liquid mixing filter element; moreover, it is low in cost and highly reliable.

Description

Technical Field

[0001] The invention belongs to the technical field of mixing devices, and in particular relates to a gas-liquid mixing filter element and a gas-liquid mixing method. Background Art

[0002] Gas-liquid mixing technology and gas-liquid mixing devices are widely used in food and beverage industry, cleaning industry, medical industry, health industry, bathing industry and so on.

[0003] Generally speaking, the main technologies for gas-liquid mixing are dissolved gas release method and gas-liquid two-phase flow method. The corresponding device for dissolved gas release technology is mainly composed of an ejector (Venturi tube) and a water pump. The ejector sucks the gas to be dissolved into the pipeline for simple mixing with the liquid. The roughly mixed gas and liquid enter the pipeline and pump head of the water pump and are pressurized and rotary cut. In a high-pressure environment, the saturated solubility of the gas in the liquid increases proportionally, and the rotary cutting in the water pump accelerates the dissolution rate of the gas in the liquid, thereby achieving the gas-liquid mixing effect of the device. This technology and the corresponding device are widely used in river pollution control, agricultural irrigation and other large-flow dissolved gas needs. Its advantages are large processing capacity and low requirements for liquid purity and viscosity. Its disadvantages are high power consumption, high noise, low quality of the generated micro-nano bubbles, and short dissolution time in the liquid. The device corresponding to the gas-liquid two-phase flow technology is mainly a hollow fiber membrane. The corresponding gas-liquid mixing device has multiple hollow fiber membranes built in. The liquid flows inside the membrane and the gas is outside the membrane. By applying a certain pressure to the gas, the gas enters the liquid path inside the hollow fiber membrane from the tiny holes on the side of the hollow fiber membrane. Under the scouring and shearing of the liquid, a large number of micro-nano bubbles are formed, thereby achieving gas-liquid mixing. This technology and the corresponding devices are mostly used in the fields of health industry, carbonated water plants, high-end nano bubble applications, etc. Its advantages are that the micro-nano bubbles produced are of high quality, the gas has a long dissolution time in the liquid, low noise and low power consumption. The disadvantage is that due to the small pore size characteristics of the hollow fiber membrane, it is not suitable for liquids with high viscosity or high impurity content. If there are many impurities or small particles in the water, the hollow fiber membrane will be blocked.

[0004] In summary, dissolved air release technology and gas-liquid two-phase flow technology each have their own advantages and disadvantages, and their applicable scenarios and fields are also different. In the field of health, the gas-liquid two-phase flow method has many applications, such as the preparation of hydrogen-rich water and oxygen-rich water. Due to the narrow passage of the hollow fiber membrane, it is easy to be blocked by impurities or particulate matter, and the high air pressure outside the membrane easily causes the membrane to be squeezed and fitted, etc., resulting in the problem that the built-in hollow fiber membrane filter element needs to be replaced frequently. The built-in hollow fiber membrane filter element has a water inlet connection port, an air inlet connection port, and a water outlet connection port. These interfaces are connected to the water and air circuits of the equipment respectively, resulting in very complicated operations when the gas-liquid mixed filter element needs to be replaced. Usually, professional personnel are required to replace it on site or the equipment needs to be returned to the factory to complete the replacement of the gas-liquid mixed filter element. Summary of the invention

[0005] The purpose of this application is to propose a gas-liquid mixing filter element to solve the technical problem that during the use and replacement of the existing gas-liquid mixer with built-in hollow fiber membrane, the disassembly and assembly is very inconvenient due to the complex connecting pipelines, and the users are often unable to complete the replacement by themselves and must be operated by professionals.

[0006] In order to solve the above problems, the present invention provides the following solutions:

[0007] A gas-liquid mixing filter element, which includes an upper cover, a lower cover, a filter element shell, a center tube and a center joint. The upper cover and the lower cover are respectively detachably connected to the upper and lower ends of the filter element shell. The center tube is arranged in the filter element shell. A plurality of hollow fiber membranes are circumferentially arranged on the outer side of the center tube. The side walls of the hollow fiber membranes are provided with a plurality of small holes. The center joint is installed on the upper cover. An air inlet and a water inlet are arranged at the upper end of the center joint, and a water outlet and an air outlet are arranged at the lower end. The water outlet is connected to the upper end of the center tube, and the air outlet is connected to the inside of the filter element shell. The lower end of the center tube is connected to the lower end of the hollow fiber membrane through the bottom cover space of the lower cover, and the upper end of the hollow fiber membrane is connected to the top cover space of the upper cover.

[0008] Preferably, a water inlet channel and an air inlet channel are provided in the central joint, the water inlet channel is communicated with the water inlet and the water outlet respectively, and the air inlet channel is communicated with the air inlet and the air outlet respectively.

[0009] Preferably, a plurality of protruding positioning ribs are provided on the outer side of the central joint, and the positioning ribs and the inner side wall of the upper cover form a water outlet channel, and the water outlet channel is communicated with the cover top space of the upper cover.

[0010] Preferably, the number of the hollow fiber membranes is greater than 100, the diameter of the hollow fiber membranes is 100 μm to 500 μm, and the pore size is 1 to 20 μm.

[0011] Preferably, the upper end of the filter element housing is connected to the upper cover by threads, and a first sealing ring is provided at the connection between the upper end of the filter element housing and the upper cover, and the lower end of the filter element housing is connected to the lower cover by threads, and a second sealing ring is provided at the connection between the lower end of the filter element housing and the lower cover.

[0012] Preferably, the upper end of the filter element housing is filled with water outlet sealant, and the lower end of the filter element housing is filled with water inlet sealant.

[0013] Preferably, a filter cartridge seat is installed on the top of the upper cover, and a water outlet pipe, an air inlet pipe and a water inlet pipe are provided on the filter cartridge seat. The water outlet pipe is connected to the top space of the upper cover through a water outlet channel, the air inlet pipe is connected to the air inlet, and the water inlet pipe is connected to the water inlet.

[0014] Preferably, the central tube and the filter element housing are an integrated structure, and the central tube is arranged on the inner wall of the filter element housing.

[0015] A gas-liquid mixing method comprises the following steps:

[0016] (1) Firmly connect the gas-liquid mixture filter element to the filter element seat;

[0017] (2) Turn on the external water pump to supply water to the water inlet pipe of the filter element seat, turn on the external air source to supply air to the air inlet pipe of the filter element seat, and ensure that the air pressure in the air inlet pipe is greater than the water pressure in the water inlet pipe;

[0018] (3) Water enters the water inlet channel of the center joint from the water inlet pipe of the filter element seat, flows through the center pipe, and reaches the bottom space of the lower cover. Under the pressure provided by the water pump, the water is pressurized from the bottom space of the lower cover into the hollow fiber membrane;

[0019] (4) The gas fills the internal space of the filter element housing. Under the action of pressure, the gas enters the hollow fiber membrane through the small holes on the hollow fiber membrane;

[0020] (5) Under the action of flowing water, the gas entering the hollow fiber membrane is continuously cut by the water to form tiny bubbles with a diameter of nanometers;

[0021] (6) The water in each hollow fiber membrane filament, together with tiny bubbles, gathers from the space on the top of the cover and enters the water outlet pipe of the filter element seat through the water outlet channel outside the center joint;

[0022] (7) Complete the preparation of gas-liquid mixture.

[0023] Compared with the prior art, this application has at least the following obvious advantages and effects:

[0024] 1. The present invention can realize simple and rapid disassembly and assembly of the gas-liquid mixing filter element, solving the problem that it is difficult for users to replace the hollow fiber gas-liquid mixer when it is blocked;

[0025] 2. The filter element of the present invention is highly integrated, small in size, occupies little space, and can effectively reduce the volume of equipment using the gas-mixing filter element; it also has low cost and high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a structural cross-sectional view of the present application;

[0027] Figure 2 is a front view of the present application;

[0028] Figure 3 It is a structural stereogram of the center joint in this application;

[0029] Figure 4 is a structural cross-sectional view of the center joint in this application;

[0030] Figure 5 yes Figure 2 AA section view in;

[0031] Figure 6 It is the installation structure diagram of the filter element seat in this application;

[0032] Figure 7 It is a structural stereogram of the filter element seat in this application;

[0033] List of parts in this application

[0034] 1-upper cover; 2-lower cover; 3-filter housing; 4-center tube; 5-center joint; 6-hollow fiber membrane; 7-water outlet sealant; 8-water inlet sealant; 9-filter seat; 11-cover top space; 21-cover bottom space; 31-first sealing ring; 32-first sealing ring; 51-air inlet; 52-water inlet; 53-water outlet; 54-air outlet; 55-water inlet channel; 56-air inlet channel; 57-positioning ribs; 58-water outlet channel; 61-small holes; 91-water outlet pipe; 92-air inlet pipe; 93-water inlet pipe. DETAILED DESCRIPTION

[0035] Specific embodiments of the present application are described in conjunction with the accompanying drawings and the following description to teach those skilled in the art how to make and use the best mode of the present application. In order to teach the principles of the application, the following conventional aspects have been simplified or omitted. Those skilled in the art should understand that variations from these embodiments fall within the scope of the present application. Those skilled in the art should understand that the following features can be combined in various ways to form multiple variations of the present application. Terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this application are only for the convenience of description, and are not intended to limit the scope of the present invention. Changes or adjustments in their relative relationships should also be regarded as the scope of the present invention without substantial changes in the technical content. Therefore, the present application is not limited to the following specific embodiments, but is only limited by the claims and their equivalents.

[0036] like Figure 1As shown, the present embodiment relates to a gas-liquid mixing filter element, which comprises an upper cover 1, a lower cover 2, a filter element housing 3, a center tube 4 and a center joint 5, wherein the upper cover 1 and the lower cover 2 are detachably connected to the upper and lower ends of the filter element housing 3, respectively, the center tube 4 is arranged in the filter element housing 3, a plurality of hollow fiber membranes 6 are circumferentially arranged on the outer side of the center tube 4, a large number of small holes are arranged on the side walls of the hollow fiber membranes 6, the center joint 5 is installed on the upper cover 1, an air inlet 51 and a water inlet 52 are arranged at the upper end of the center joint 5, a water outlet 53 and an air outlet 54 are arranged at the lower end, the water outlet 53 is connected to the upper end of the center tube 4, the air outlet 54 is connected to the inside of the filter element housing 3, the lower end of the center tube 4 is connected to the lower end of the hollow fiber membrane 6 through the bottom cover space 21 of the lower cover 2, and the upper end of the hollow fiber membrane 6 is connected to the top cover space 11 of the upper cover 1. The main function of the gas-liquid mixing filter element in this embodiment is to instantly generate a large number of nanobubbles from the insoluble gas, thereby dissolving a large amount of gas in the liquid. Applicable gases include but are not limited to hydrogen, oxygen and other gases that are insoluble in water (the saturated solubility at room temperature and pressure is less than 100PPM), and applicable liquids include but are not limited to water, glucose solution, medical saline and other low-viscosity liquids.

[0037] like Figures 2 to 4 As shown, it should be specifically explained that, in the embodiment of the present application, the center joint 5 is provided with a water inlet channel 55 and an air inlet channel 56, the water inlet channel 55 is respectively connected with the water inlet 52 and the water outlet 53, the inner diameter of the water inlet channel 55 close to the water inlet 52 is smaller than the inner diameter of the water inlet channel 55 close to the water outlet 53, the air inlet channel 56 is respectively connected with the air inlet 51 and the air outlet 54, the inner diameter of the air inlet channel 56 close to the air inlet 51 is larger than the inner diameter close to the air outlet 5, a plurality of protruding positioning ribs 57 are provided on the outer side of the center joint 5, when the center joint 5 is installed in the upper cover 1, the positioning ribs 57 and the inner side wall of the upper cover 1 form a water outlet channel 58, and the water outlet channel 58 is connected with the top cover space 11 of the upper cover 1.

[0038] It should be noted that the number of hollow fiber membranes 6 in the filter element housing 3 exceeds 100, the diameter of the hollow fiber membranes is 200 μm, and the pore size is 12 μm.

[0039] like Figure 1As shown, it should be noted that the upper end of the filter element housing 3 is connected to the upper cover 1 by threads, and a first sealing ring 31 is provided at the connection between the upper end 3 of the filter element housing and the upper cover 1, and the lower end of the filter element housing 3 is connected to the lower cover 2 by threads, and a second sealing ring 32 is provided at the connection between the lower end of the filter element housing 3 and the lower cover 2. The upper end of the filter element housing 3 is filled with the water outlet sealant 7, which can improve the sealing performance of the upper end of the hollow fiber membrane 6 and the center joint 5 at the water outlet, and at the same time, the upper end of the hollow fiber membrane 6 and the lower end of the center joint 5 are fixedly packaged in the filter element housing 3, and the lower end of the filter element housing 3 is filled with the water inlet sealant 8, which can improve the sealing performance of the lower end of the hollow fiber membrane 6 and the lower end of the center tube 4, and at the same time, the lower end of the hollow fiber membrane 6 and the lower end of the center tube 4 are packaged in the filter element housing 3. The center tube 4 and the filter element housing 3 are an integrated structure, and the center tube 4 is arranged on the inner wall of the filter element housing 3, that is, the center tube 4 can be a part of the filter element housing 3, that is, a closed space is formed on the filter element housing 3 for water inlet.

[0040] like Figure 6 and Figure 7 As shown, it should be specifically explained that, in the embodiment of the present application, a filter cartridge seat 9 is installed on the top of the upper cover 1, and a water outlet pipe 91, an air inlet pipe 92 and a water inlet pipe 93 are provided on the filter cartridge seat 9. The water outlet pipe 91 is connected to the cover top space 11 of the upper cover 1 through the water outlet channel 58, the air inlet pipe 92 is connected to the air inlet 51, and the water inlet pipe 93 is connected to the water inlet 52.

[0041] In the embodiment of the present application, the upper cover 1 and the inner side of the filter cartridge seat 9 have corresponding threads. After the filter cartridge is inserted into the filter cartridge seat 9, the filter cartridge can be firmly connected to the filter cartridge seat 9 by rotating the filter cartridge at a certain angle. When replacing, rotate the old filter cartridge counterclockwise; separate the old filter cartridge from the filter cartridge seat 9; insert the new filter cartridge into the filter cartridge seat 9; rotate the filter cartridge clockwise to complete the replacement.

[0042] The principle of using the present invention to prepare a hydrogen-containing aqueous solution:

[0043] 1. Firmly connect the gas-liquid mixture filter element to the filter element seat;

[0044] 2. Turn on the external water pump to supply water to the water inlet pipe 93 of the filter element seat 9, turn on the air source to supply air to the air inlet pipe 92 of the filter element seat 9, and ensure that the air pressure of the air inlet pipe 92 is greater than the water pressure in the water inlet pipe 93;

[0045] 3. Water enters the water inlet channel 55 of the central joint 5 from the water inlet pipe 93 of the filter element seat 9, flows through the central tube 4, and reaches the bottom space 21 of the lower cover 2. Under the pressure provided by the water pump, the water is pressurized from the bottom space 21 of the lower cover 2 into the hollow fiber membrane 6;

[0046] 4. The hydrogen fills the inner space of the filter element housing 3. Under the action of pressure, the hydrogen enters the hollow fiber membrane 5 through the small holes 51 on the hollow fiber membrane 5;

[0047] 5. Under the action of flowing water, the gas entering the hollow fiber membrane 5 is continuously cut by the water to form tiny bubbles with nanometer diameter;

[0048] 6. The water in each hollow fiber membrane 5 is gathered from the cover top space 11 together with the tiny hydrogen bubbles, and enters the water outlet pipe 91 of the filter element seat 9 through the water outlet channel 58 outside the center joint 5;

[0049] 7. Complete the preparation of hydrogen-rich water.

[0050] Since it is easy for those skilled in the art to think of it, any modification, equivalent substitution, improvement, etc. made within the concept and principle of the application should be included in the scope of the claims of this application.

Claims

1. A gas-liquid mixing filter element, characterized in that: The filter element comprises an upper cover, a lower cover, a filter element housing, a central tube and a central joint. The upper cover and the lower cover are detachably connected to the upper and lower ends of the filter element housing respectively. The central tube is arranged in the filter element housing. A plurality of hollow fiber membranes are arranged circumferentially on the outer side of the central tube. A plurality of small holes are arranged on the side walls of the hollow fiber membranes. The central joint is installed on the upper cover. An air inlet and a water inlet are arranged at the upper end of the central joint. A water outlet and an air outlet are arranged at the lower end. The water outlet is communicated with the upper end of the central tube. The air outlet is communicated with the inside of the filter element housing. The lower end of the central tube is connected to the lower end of the hollow fiber membrane through the cover bottom space of the lower cover. The ends are connected, and the upper ends of the hollow fiber membrane fibers are connected to the top space of the upper cover; a water inlet channel and an air inlet channel are arranged in the central joint, the water inlet channel is connected to the water inlet and the water outlet respectively, and the air inlet channel is connected to the air inlet and the air outlet respectively; a plurality of protruding positioning ribs are arranged on the outer side of the central joint, and the positioning ribs and the inner side wall of the upper cover form a water outlet channel, and the water outlet channel is connected to the top space of the upper cover; the inner diameter of the water inlet channel near the water inlet end is smaller than the inner diameter of the water inlet channel near the water outlet end, and the inner diameter of the air inlet channel near the air inlet end is larger than the inner diameter near the air outlet end.

2. The gas-liquid mixing filter element according to claim 1, characterized in that: The number of the hollow fiber membranes is greater than 100, the diameter of the hollow fiber membranes is 100 μm to 500 μm, and the aperture of the small holes is 1 to 20 μm.

3. The gas-liquid mixing filter element according to claim 1, characterized in that: The upper end of the filter housing is connected to the upper cover by threads, and a first sealing ring is provided at the connection between the upper end of the filter housing and the upper cover. The lower end of the filter housing is connected to the lower cover by threads, and a second sealing ring is provided at the connection between the lower end of the filter housing and the lower cover.

4. The gas-liquid mixing filter element according to claim 1, characterized in that: The upper end of the filter element shell is filled with water outlet sealant, and the lower end of the filter element shell is filled with water inlet sealant.

5. The gas-liquid mixing filter element according to claim 1, characterized in that: A filter element seat is installed on the top of the upper cover, and a water outlet pipe, an air inlet pipe and a water inlet pipe are arranged on the filter element seat. The water outlet pipe is connected with the cover top space of the upper cover through the water outlet channel, the air inlet pipe is connected with the air inlet, and the water inlet pipe is connected with the water inlet.

6. The gas-liquid mixing filter element according to claim 1, characterized in that: The central tube and the filter element shell are an integrated structure, and the central tube is arranged on the inner wall of the filter element shell.

7. A gas-liquid mixing method based on the gas-liquid mixing filter element according to any one of claims 1 to 6, characterized in that: The following steps are involved: (1) Firmly connect the gas-liquid mixture filter element to the filter element seat; (2) Turn on the external water pump to supply water to the water inlet pipe of the filter element seat, turn on the external air source to supply air to the air inlet pipe of the filter element seat, and ensure that the air pressure in the air inlet pipe is greater than the water pressure in the water inlet pipe; (3) Water enters the water inlet channel of the center joint from the water inlet pipe of the filter element seat, flows through the center pipe, and reaches the bottom space of the lower cover. Under the pressure provided by the water pump, the water is pressed from the bottom space of the lower cover into the hollow fiber membrane; (4) The gas fills the internal space of the filter element shell. Under the action of pressure, the gas enters the hollow fiber membrane through the small holes on the hollow fiber membrane; (5) Under the action of flowing water, the gas entering the hollow fiber membrane is continuously cut by the water to form tiny bubbles with a diameter of nanometers; (6) The water in each hollow fiber membrane filament, together with tiny bubbles, gathers from the space on the top of the cover and enters the water outlet pipe of the filter element seat through the water outlet channel outside the center joint; (7) Complete the preparation of gas-liquid mixture.

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