Gas-liquid mixing and lifting device

Abstract

The invention belongs to the technical field of gas-liquid mixing, and discloses a gas-liquid mixing lifting device which comprises a lifting pipe, a gas-liquid mixing device and a gas-liquid mixing device, the mixing chamber is connected to the lower end of the lifting pipe; the air distributor is of an annular hollow structure and is connected to the lower end of the mixing chamber, an air inlet hole is formed in the outer annular face of the air distributor and used for being connected with a compressed air source, and a plurality of air outlet holes are formed in the air distributor in the circumferential direction at intervals. According to the gas-liquid mixing and lifting device disclosed by the invention, compressed air can be uniformly dispersed into numerous fine air flows through the air distributor to uniformly enter the mixing chamber, so that the contact with liquid is more comprehensive and uniform, the condition of local non-uniform mixing is avoided, and the overall uniformity of gas-liquid mixing is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of gas-liquid mixing, and in particular relates to a gas-liquid mixing and lifting device. Background Art

[0002] In many industrial application scenarios involving gas-liquid mixing, such as the mixing of reaction materials in chemical production and the aeration of sewage treatment in the environmental protection field, existing gas-liquid mixing and lifting devices often have problems such as poor mixing effect, easy clogging, and lack of convenient and effective maintenance devices. For example, when air enters the liquid, it cannot be evenly dispersed, resulting in uneven mixing and affecting the quality of subsequent processes; or during long-term use, the filter screen at the suction end is easily clogged with impurities without effective cleaning methods, which in turn affects the normal operation efficiency of the entire device.

[0003] In view of this, it is necessary to improve the existing gas-liquid mixing lifting device to solve the above problems. Summary of the Invention

[0004] To solve the above problems, this application organically integrates multiple functional components such as lifting pipes, air distributors, mixing chambers, filters and backwash mechanisms to form an integrated gas-liquid mixing and lifting device. The components cooperate and work together to solve multiple key problems such as gas-liquid mixing, impurity filtration, filter maintenance and gas-liquid mixture lifting in one stop, providing related industries with a more efficient, convenient and practical multi-functional solution.

[0005] A gas-liquid mixing and lifting device, comprising:

[0006] A riser tube, for inserting into the reaction tank;

[0007] a mixing chamber connected to the lower end of the riser;

[0008] The air distributor is an annular hollow structure connected to the lower end of the mixing chamber. An air inlet is provided on the outer ring surface of the air distributor. The air inlet is used to connect to the compressed air source. A plurality of air outlets are provided on the air distributor at intervals along the circumference.

[0009] The air distributor can evenly disperse the air into many small air flows and evenly enter the mixing chamber, so that the contact with the liquid is more comprehensive and uniform, avoiding local uneven mixing, thereby improving the overall uniformity of the gas-liquid mixing.

[0010] Optionally, the mixing chamber is a conical cylinder that is smaller at the top and larger at the bottom.

[0011] The larger space at the bottom can accommodate more gas and liquid, so that the gas and liquid are fully mixed in the mixing chamber and then lifted into the lifting pipe.

[0012] Optionally, the inner side of the mixing chamber is provided with at least one curved guide groove.

[0013] The curved guide groove can extend the time and path of gas-liquid mixing, giving gas and liquid more opportunities to interact and fully blend. Compared with the traditional mixing chamber with a simple cavity structure, it can greatly enhance the degree of gas-liquid mixing.

[0014] Optionally, the guide groove is a spiral guide groove.

[0015] Through the spiral guide groove, the liquid can be guided to form a spiral upward flow path under the action of airflow. The liquid in the mixing chamber rises in a spiral along the guide groove under the action of airflow, which extends the time and path of gas-liquid contact, allowing gas and liquid more opportunities to interact and fully blend. Compared with the traditional mixing chamber with a simple cavity structure, it can greatly enhance the degree of gas-liquid mixing.

[0016] Optionally, a filter screen is further included, and the filter screen is fixedly connected to the inner annular surface of the air distributor.

[0017] The fine structure of the filter can effectively intercept impurities in the liquid, preventing them from entering the riser and subsequent processes at the source, thus ensuring the stable operation of the device.

[0018] Optionally, a backwash mechanism is also included, which includes a backwash pipeline, a second valve, an annular tube and a nozzle. The annular tube is arranged above the filter screen, and multiple nozzles are arranged on the annular tube. One end of the backwash pipeline is connected to the backwash medium, and the other end is connected to the annular tube. The second valve is arranged on the backwash pipeline.

[0019] The backwashing pipeline is connected to the external backwashing medium, and the external backwashing medium is introduced to reversely flush the filter screen, thereby timely and conveniently removing impurities accumulated in the filter screen. There is no need to manually disassemble the filter screen frequently for cleaning, which greatly improves the maintenance convenience of the filter screen, reduces maintenance costs, and ensures that the device can work continuously and stably for a long time.

[0020] Optionally, a first valve is provided on a compressed air pipeline connecting the air inlet and the compressed air source.

[0021] By switching the first valve, the flow of compressed air into the air distributor can be controlled.

[0022] Optionally, adjacent air outlet holes are arranged staggered in the radial direction.

[0023] It can evenly contact and mix with the liquid as much as possible in the circumferential and radial directions, further improving the uniformity of gas-liquid mixing.

[0024] Optionally, a plurality of air outlet holes are provided on the upper annular surface of the air distributor.

[0025] Optionally, a plurality of air outlet holes are also provided on the inner annular surface of the air distributor.

[0026] It can be mixed with the liquid during the liquid entering process to further improve the mixing efficiency, but there should not be too many air holes on the inner ring surface, otherwise the liquid may not be able to enter the air distributor smoothly due to the lateral impact of the airflow.

[0027] Compared with the prior art, this application has the following beneficial effects:

[0028] (1) The gas-liquid mixing and lifting device of the present application can evenly disperse the compressed air into numerous small air flows through the air distributor and evenly enter the mixing chamber, so that the contact with the liquid is more comprehensive and uniform, avoiding the occurrence of local uneven mixing, thereby improving the overall uniformity of the gas-liquid mixing.

[0029] (2) The spiral guide groove on the inner side of the mixing chamber can guide the liquid to form a spiral upward flow path under the action of the airflow. The liquid in the mixing chamber rises along the guide groove under the action of the airflow, which prolongs the time and path of gas-liquid contact, allowing the gas and liquid to have more opportunities to interact and fully blend. Compared with the traditional mixing chamber with a simple cavity structure, it can greatly enhance the degree of gas-liquid mixing.

[0030] (3) A filter screen is installed at the lower end of the lifting pipe. With its fine structure, it can effectively intercept impurities in the liquid, prevent impurities from entering the lifting pipe and subsequent processes from the source, and ensure the stable operation of the device.

[0031] (4) As the filter is used for a longer time, the amount of impurities it intercepts will gradually increase, which will inevitably affect its filtering effect and the normal inhalation of the liquid. By connecting the backwash pipe to the external backwash medium, the external backwash medium is introduced to backwash the filter, which can promptly and conveniently remove the impurities accumulated in the filter. There is no need for manual frequent disassembly of the filter for cleaning, which greatly improves the maintenance convenience of the filter, reduces maintenance costs, and ensures that the device can continue to work stably for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of a gas-liquid mixing and lifting device in the prior art.

[0033] Figure 2 Schematic diagram of the gas-liquid mixing and lifting device according to an embodiment of the present invention.

[0034] Figure 3 This is a schematic diagram of the compressed air pipeline and backwash pipeline according to an embodiment of the present invention.

[0035] Figure 4 This is a schematic diagram of an implementation of the air distributor described in an embodiment of the present invention.

[0036] Figure 5 This is a schematic diagram of another embodiment of the air distributor described in an embodiment of the present invention.

[0037] Figure 6 This is a schematic diagram of another embodiment of the air distributor described in the embodiment of the present invention.

[0038] Figure 7 Schematic diagram of a mixing chamber according to an embodiment of the present invention.

[0039] Figure 8 Schematic diagram of the spiral guide groove according to an embodiment of the present invention.

[0040] Figure 9 Schematic diagram of the annular tube according to an embodiment of the present invention.

[0041] Reference numerals:

[0042] Riser 10, compressed air pipeline 20, first valve 201, reaction tank 30, air distributor 40, air inlet 401, air outlet 402, filter 403, mixing chamber 50, spiral guide groove 501, backwash pipeline 60, second valve 601, annular pipe 602, nozzle 603 DETAILED DESCRIPTION

[0043] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0044] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Among them, "fixed connection" means that the two are connected to each other and the relative position relationship after the connection remains unchanged. "Rotational connection" means that the two are connected to each other and can rotate relative to each other after the connection. The directional terms mentioned in the embodiments of the present application, such as "upper", "lower", "inner", "outer", etc., are only referenced to the directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present application, 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 cannot be understood as a limitation on the embodiments of the present application. Among them, the two components are obtained by an integrated structure through an integrated molding process, which means that in the process of forming one of the two components, the component is connected to the other component, and there is no need to connect the two components together through reprocessing (such as bonding, welding, snap connection, screw connection).

[0045] Currently, gas-liquid mixing and lifting devices are widely used in the industrial fields of toxic liquid treatment, biochemical reactor design, nuclear chemical industry, and wastewater treatment. They are characterized by simple equipment piping structure, no transmission parts, no maintenance parts, good reliability and high efficiency.

[0046] Gas-liquid mixing and lifting is a physical process. According to Henry's law, it is achieved by increasing the partial pressure of one phase to reduce the partial pressure of the other phase. Gas-liquid mixing and lifting device, used in the sewage industry to lift sewage or sludge, is also called air lift pump. It is different from the water pump used in daily life in that it does not consume electricity, but uses high-pressure air as power to lift liquid or sludge. The principle of gas-liquid mixing and lifting device commonly used in industrial production is as follows: Figure 1 As shown, a riser tube 10 is inserted into a reaction tank 30 and connected to the bottom of the riser tube 10 via a compressed air line 20. Once gas is introduced to the bottom of the riser tube 10, bubbles rise due to buoyancy and fill the entire riser tube 10. Inside the tube is a mixture of gas and water, while outside is wastewater, creating a continuous flow between the inside and outside of the tube. Because the density of the water vapor solution is lower than that of water, the lower-density liquid has a higher surface area. Under the pressure of the water column outside the riser tube, the water vapor solution rises from the tube according to liquid equilibrium conditions.

[0047] Typically, compressed air is introduced into the riser through a compressed air line. However, this line and the riser are merely a connecting interface, preventing the air from effectively dispersing within the riser. This prevents the air from evenly dispersing into the liquid, leading to uneven mixing. Furthermore, the filter at the riser's suction end is easily clogged with impurities, and there's no effective way to clean it. This requires disassembly and cleaning, impacting the overall system's efficiency.

[0048] The gas-liquid mixing and lifting device of this embodiment can evenly distribute the compressed air into the mixing chamber through the air distributor, and the air is evenly dispersed into numerous small air flows, so that after entering the mixing chamber, the air can come into contact with the liquid more comprehensively and evenly, avoiding the occurrence of local uneven mixing, thereby improving the overall uniformity of the gas-liquid mixing.

[0049] The gas-liquid mixing and lifting device provided in the embodiments of the present application is described in detail below with reference to the accompanying drawings and specific embodiments.

[0050] Please refer to Figure 2 The gas-liquid mixing and lifting device of this embodiment includes an air distributor 40, which is connected to the lower end of the mixing chamber and is used to evenly disperse the gas input therein into numerous small air flows and then enter the mixing chamber; a mixing chamber 50, which is connected to the lower end of the lifting pipe 10 and is used to transport the gas-liquid mixture after the gas and liquid are mixed into the lifting pipe 10; the lifting pipe 10 is used to be inserted into the reaction tank 1 to lift and transport the gas-liquid mixture to the subsequent process.

[0051] Please refer to Figure 3 The air distributor 40 is an annular hollow structure. Specifically, the air distributor 40 includes an inner annular surface, an outer annular surface, an upper annular surface and a lower annular surface, and the inner annular surface, the outer annular surface, the upper annular surface and the lower annular surface together form an annular airflow channel. An air inlet 401 is provided on the outer annular surface for communicating with the compressed air pipeline 20. The compressed air pipeline 20 can be connected to the air outlet of an external air compressor, or it can also be connected to a centralized compressed air source. A first valve 201 can be provided on the compressed air pipeline 20, and compressed air can enter the annular airflow channel of the air distributor 40 from the compressed air pipeline through the air inlet. The area enclosed by the inner annular surface of the air distributor is used to pass liquid, specifically, the liquid in the reaction tank 30 flows from the inner side of the inner annular surface through the air distributor and enters the mixing chamber 50.

[0052] A plurality of air outlet holes 402 are provided on the upper annular surface of the air distributor 40 at intervals along the circumference, and the air outlet holes 402 are connected to the annular air flow channel. The compressed air entering from the air inlet 401 can flow along the annular air flow channel and flow out from each air outlet hole 402. The size and spacing of the air outlet holes 402 can be set. Since the air outlet holes 402 are evenly distributed in the circumference, the compressed air can be evenly distributed to all parts of the circumference, and evenly dispersed into numerous small air flows through the air distributor, and then evenly enter the mixing chamber 3 to fully contact and mix with the liquid. Due to the buoyancy, the bubbles will rise and fill the entire lifting pipe 10. The pipe contains a mixture of gas and water. Because the density of the water vapor solution is less than that of water, under the action of the water column pressure outside the lifting pipe, according to the liquid equilibrium condition, the water vapor solution rises and is output from the lifting pipe.

[0053] The purpose of this application is to evenly distribute air circumferentially through an annular airflow channel. The air distributor 40 can be circular, square, or other irregularly shaped. The air distributor can match the bottom shape of the riser 10. For example, if the bottom shape of the riser 10 is circular, the air distributor 40 can be circular. If the bottom shape of the riser 10 is square, the air distributor 40 can be square. For ease of description, the following description will only use a circular air distributor as an example. The arrangement of the air inlet and outlet holes is also applicable to air distributors of other shapes.

[0054] In some embodiments, please refer to Figure 4 Adjacent air outlet holes 402 can be staggered in the radial direction. The air outlet holes arranged in this way not only contact the liquid evenly in the circumferential direction, but also contact the liquid as much as possible in the radial direction, which can make the air and liquid mix more evenly.

[0055] In some embodiments, please refer to Figure 5 The air outlet holes 402 can be set to different diameters. When air enters the annular airflow channel from the air inlet hole 401, the pressure of the air flowing out of the air outlet holes 402 is determined by the size of the hole diameter. Therefore, the pressure of the air flowing out of the annular airflow channel through the air outlet holes 402 of different hole diameters is different. The smaller the hole diameter of the air outlet hole 402, the greater the pressure of the ejected air flow, and the larger the hole diameter of the air outlet hole 402, the lower the pressure of the ejected air flow. This makes the pressure of the air flow ejected from the air outlet holes 402 of different diameters different, thereby causing the air to mix with the liquid at different pressures. The air with higher pressure can flow into the inner layer of the liquid to mix with the liquid, while the air with lower pressure can flow into the outer layer of the liquid to mix with the liquid. In this way, the air and liquid are mixed at different levels, achieving a more uniform mixing effect.

[0056] In some embodiments, a plurality of air outlet holes 402 may also be provided on the inner annular surface of the air distributor. The plurality of air outlet holes 402 are evenly distributed along the circumferential intervals of the inner annular surface. The air in the annular air flow channel can also flow out evenly from the inner annular surface and can be further evenly mixed with the liquid.

[0057] Similarly, the air outlet holes on the inner annular surface can also be set to have different apertures, or can be set to be arranged in a staggered manner in the vertical direction with adjacent air outlet holes. The specific principle is the same as above and will not be explained here.

[0058] It should be noted that the above arrangement of the air outlet holes can be adopted in a single manner or in a combination of multiple manners.

[0059] Please refer to Figure 6 The mixing chamber 50 is a conical cylinder with a smaller upper portion and a larger lower portion. Its lower end is fixedly connected to the upper end of the air distributor, either by fasteners or as an integral part. Its upper end is fixedly connected to the lower end of the riser 10, either by fasteners or as an integral part.

[0060] The mixing chamber 50 is used to accommodate the gas ejected from the air outlet 402 of the air distributor and the liquid flowing in from the inner side of the inner annular surface of the air distributor. In some embodiments, the inner side of the mixing chamber 50 has multiple curved guide grooves, such as spiral guide grooves 501, which can guide the liquid to form a spiral upward flow path under the influence of the airflow. The liquid in the mixing chamber spirals upward along the guide grooves under the influence of the airflow, extending the time and path of gas-liquid contact, allowing the gas and liquid more opportunities to interact and fully blend. Compared with traditional mixing chambers with simple cavity structures, this can greatly enhance the degree of gas-liquid mixing.

[0061] Among them, the spiral guide groove can be formed by a single-head spiral line or a multi-head spiral line. The guide groove using a multi-head spiral line can extend the gas-liquid mixing contact time through the spiral structure, and can also have multiple liquids quickly guide into the lifting pipe 10.

[0062] The lower end of the riser 10 is connected to the upper end of the mixing chamber 50, and the mixed gas-liquid mixture enters the riser 10. The liquid outlet end of the riser 10 is located above the liquid surface of the reaction tank 30 and can be connected to the next process to transport the gas-liquid mixture to the next process.

[0063] In some embodiments, a filter screen 403 is provided on the inner side of the air distributor, and the filter screen is fixedly connected to the inner annular surface of the air distributor. The water flow entering the inner side of the air distributor from the reaction tank 30 will be filtered, thereby intercepting impurities.

[0064] During the lifting process of a gas-liquid mixture, the liquid often contains various impurities. If these impurities are drawn into the riser pipe along with the liquid, they can easily accumulate inside the pipe, blocking the riser pipe 10, affecting the normal operation of the entire device and even causing damage to the equipment. This device incorporates a filter at the lower end of the riser pipe 10. Its fine structure effectively intercepts impurities in the liquid, preventing them from entering the riser pipe and subsequent processes at the source, thus ensuring stable operation of the device.

[0065] In some embodiments, a backwash mechanism is further included, comprising a backwash line 60, a second valve 601, an annular pipe 602, and a nozzle 603. The annular pipe 602 is disposed above the filter screen 403. One end of the backwash line 60 is connected to an external backwash medium, which may be a liquid or a gas, and the other end is connected to the annular pipe 602. The backwash line 60 is provided with a second valve 601. By operating and controlling the second valve 601, the liquid or gas can be introduced into the annular pipe 602. Multiple nozzles 603 are connected to the annular pipe 602, which may be evenly arranged along the circumference of the annular pipe 602. The nozzles 603 evenly spray the backwash medium onto the filter screen 403, promptly removing impurities accumulated on the filter screen and ensuring the continuous and stable operation of the device.

[0066] The backwash line 60 can be passed from the upper end of the riser 10 into the riser and then connected to the annular tube 602. A flexible hose is preferably used for the backwash line 60. Alternatively, a through hole may be provided in the mixing chamber 50, through which the backwash line 60 is connected to the annular tube 602. A rigid tube is preferably used for the backwash line 60. The outer wall of the backwash line 60 should be sealed to the through hole to prevent leakage of the gas-liquid mixture.

[0067] As the filter screen is used for a longer time, the amount of impurities it intercepts will gradually increase, inevitably affecting its filtering effect and the normal inhalation of liquid. To solve this problem, a backwash line is connected to an external backwash medium, and a second control valve is set to introduce external backwash medium to backwash the filter screen, promptly and conveniently removing impurities accumulated on the filter screen. This eliminates the need for frequent manual disassembly of the filter screen for cleaning, greatly improving the filter screen's maintenance convenience, reducing maintenance costs, and ensuring the device can continue to work stably for a long time.

[0068] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art may make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications shall fall within the scope of protection of the claims of the present invention.

Claims

1. A gas-liquid mixing and lifting device, characterized in that: include: A riser tube, for inserting into the reaction tank; a mixing chamber connected to the lower end of the riser; The air distributor is an annular hollow structure connected to the lower end of the mixing chamber. An air inlet is provided on the outer ring surface of the air distributor. The air inlet is used to connect to the compressed air source. A plurality of air outlets are provided on the air distributor at intervals along the circumference.

2. The gas-liquid mixing and lifting device according to claim 1, characterized in that: The mixing chamber is a conical cylinder that is smaller at the top and larger at the bottom.

3. The gas-liquid mixing and lifting device according to claim 1 or 2, characterized in that: The inner side of the mixing chamber is provided with at least one curved guide groove.

4. The gas-liquid mixing and lifting device according to claim 3, characterized in that: The guide groove is a spiral guide groove.

5. The gas-liquid mixing and lifting device according to claim 1, characterized in that: It also includes a filter screen, which is fixedly connected to the inner annular surface of the air distributor.

6. The gas-liquid mixing and lifting device according to claim 5, characterized in that: It also includes a backwashing mechanism, which includes a backwashing pipeline, a second valve, an annular tube and a nozzle. The annular tube is arranged above the filter screen, and multiple nozzles are arranged on the annular tube. One end of the backwashing pipeline is connected to the backwashing medium, and the other end is connected to the annular tube. The second valve is arranged on the backwashing pipeline.

7. The gas-liquid mixing and lifting device according to claim 1, characterized in that: A first valve is provided on the compressed air pipeline connecting the air inlet and the compressed air source.

8. The gas-liquid mixing and lifting device according to claim 1, characterized in that: Adjacent air outlet holes are staggered in the radial direction.

9. The gas-liquid mixing and lifting device according to claim 1, characterized in that: A plurality of air outlet holes are arranged on the upper annular surface of the air distributor.

10. The gas-liquid mixing and lifting device according to claim 1, characterized in that: A plurality of air outlet holes are also provided on the inner annular surface of the air distributor.

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