Gas-liquid mixing device

Abstract

The utility model provides a gas-liquid mixing device which comprises a liquid path pipeline, a gas path pipeline and a gas-liquid mixer, the liquid path pipeline is used for providing liquid raw materials, the gas path pipeline is used for providing gas raw materials, and the gas-liquid mixer is used for mixing the gas raw materials. The gas-liquid mixer is used for fully mixing a liquid raw material provided by a liquid path pipeline and a gas raw material provided by a gas path pipeline in the gas-liquid mixer, and comprises a gas-liquid mixer main body, a first diverging element, a second diverging element, a gas-liquid mixture inlet and a gas-liquid mixture outlet, the first diverging element and the second diverging element are respectively arranged at two ends of the gas-liquid mixer main body, and the gas-liquid mixer main body is internally filled with a filler; a gas-liquid mixture entering the gas-liquid mixer through the gas-liquid mixture inlet sequentially passes through the first diverging element, the gas-liquid mixer main body and the second diverging element to be mixed and then flows out of the gas-liquid mixture outlet.

Description

Technical Field

[0001] The utility model relates to a gas-liquid mixing device, more specifically, to a gas-liquid mixing device for continuous flow reaction. Technical Background

[0002] As the country's safety requirements for the chemical and pharmaceutical industries continue to increase, more and more companies are developing continuous flow reaction processes to improve operational safety and reaction quality stability. For continuous flow reaction processes involving gas, one of the biggest problems currently is how to fully mix the gaseous and liquid raw materials. Although there are many types of gas-liquid mixing devices on the market, the overall volume of these gas-liquid mixing devices is relatively large. For medium and small-scale laboratory continuous flow reaction processes, these commercially available gas-liquid mixing devices are prone to material residue and large feeding deviation. However, the existing small and simple gas-liquid mixing devices, for example, gas-liquid mixing devices that only include a liquid pipeline (providing liquid raw material) and a gas pipeline (providing gas raw material), and gas-liquid mixing devices that include a liquid pipeline, a gas pipeline and a simple diverging element, all have poor final mixing effects on the liquid and gas raw materials. Or when a large amount of heat is released during the mixing process of the liquid and gas raw materials, such simple devices cannot effectively remove the generated heat, resulting in poor mixing effect and even loss of gas raw materials.

[0003] Therefore, there is a need for a gas-liquid mixing device that can be applied to continuous flow reaction processes of different scales. Utility Model Content

[0004] The purpose of this utility model is to provide a gas-liquid mixing device, which significantly improves the mixing effect of gas raw materials and liquid raw materials by mixing the gas raw materials and liquid raw materials multiple times. To achieve the purpose of this utility model, this utility model adopts the following technical solutions:

[0005] A gas-liquid mixing device comprises a liquid pipeline, an air pipeline and a gas-liquid mixer, wherein the liquid pipeline is used to provide liquid raw materials, the air pipeline is used to provide gas raw materials, and the gas-liquid mixer is used to fully mix the liquid raw materials provided by the liquid pipeline and the gas raw materials provided by the air pipeline. The gas-liquid mixer comprises a gas-liquid mixer body, a first diverging element, a second diverging element, a gas-liquid mixture inlet and a gas-liquid mixture outlet, wherein the first diverging element and the second diverging element are respectively arranged at both ends of the gas-liquid mixer body, and the gas-liquid mixer body is filled with filler. The gas-liquid mixture entering the gas-liquid mixer through the gas-liquid mixture inlet is mixed in turn by passing through the first diverging element, the gas-liquid mixer body and the second diverging element, and then flows out from the gas-liquid mixture outlet.

[0006] In a preferred embodiment, the gas-liquid mixing device further comprises a tee, and the tee is used to connect the liquid pipeline, the gas pipeline and the gas-liquid mixer.

[0007] In a preferred embodiment, the tee is T-shaped.

[0008] In a preferred embodiment, the tee and the gas-liquid mixture inlet are integrally formed.

[0009] In a preferred embodiment, the first diverging element and the second diverging element are each independently selected from one of foam nickel, microporous filter element, filter cotton, and filter mesh.

[0010] In a preferred embodiment, the apertures of the first and second diverging elements are between 100 mesh and 250 mesh.

[0011] In a preferred embodiment, a heat exchange interlayer is further provided on the outside of the gas-liquid mixer body for absorbing heat released during the mixing of the liquid raw material and the gas raw material or cooling the gas-liquid mixture.

[0012] In a preferred embodiment, the cross section of the heat exchange interlayer is annular, a heat exchange medium is filled in the interior thereof, and the heat exchange interlayer is provided with a heat exchange liquid inlet and a heat exchange liquid outlet.

[0013] In a preferred embodiment, the gas-liquid mixer body is cylindrical.

[0014] In a preferred embodiment, the filler is selected from glass ball fillers, spring fillers, and spherical molecular sieve fillers.

[0015] In a preferred embodiment, the size of the filler is 1 mm to 15 mm.

[0016] In a preferred embodiment, the first diverging element and the second diverging element are fixedly mounted at opposite ends of the gas-liquid mixer body, and a first cover integrally formed with the gas-liquid mixture inlet and a second cover integrally formed with the gas-liquid mixture outlet are detachably mounted at opposite ends of the gas-liquid mixer body to cover the first diverging element and the second diverging element, respectively. For example, the first cover and the second cover are threadedly mounted at opposite ends of the gas-liquid mixer body.

[0017] In a preferred embodiment, the diameters of the first diverging element and the second diverging element are the same as the outer diameter of the gas-liquid mixer body, and they are fixed to the ends of the gas-liquid mixer body via first and second flanges, respectively. A first cover integrally formed with the gas-liquid mixture inlet and a second cover integrally formed with the gas-liquid mixture outlet cover the first and second flanges, respectively, and are detachably mounted on the ends of the gas-liquid mixer body. For example, the first and second covers are mounted on the ends of the gas-liquid mixer body via conventional connection methods such as clamps and bolts. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a gas-liquid mixing device in an installed state according to a specific embodiment of the utility model.

[0019] Figure 2 It is a structural schematic diagram of a gas-liquid mixing device in an installed state according to another specific embodiment of the present invention.

[0020] Figure 3 is similar Figure 2 Schematic diagram of the structure of the gas-liquid mixing device in an uninstalled state.

[0021] Figure 4 It is a structural schematic diagram of a gas-liquid mixing device in an uninstalled state according to another specific embodiment of the present invention.

[0022] Figure 5 It is a structural schematic diagram of the first diverging element or the second diverging element of a specific embodiment of the utility model.

[0023] Figures 1 to 3 In the figure, 1 is a liquid pipeline, 2 is a gas pipeline, 3 is a gas-liquid mixer, 4 is a tee, 31 is a gas-liquid mixer body, 32-1 is a first diverging element, 32-2 is a second diverging element, 33 is a gas-liquid mixture inlet, 34 is a gas-liquid mixture outlet, 35 is a first cover, 36 is a second cover, 37 is a packing, 38 is a heat exchange interlayer, 39 is a heat exchange medium inlet, and 40 is a heat exchange medium outlet.

[0024] Figure 4 In the figure, 1 is a liquid pipeline, 2 is a gas pipeline, 3 is a gas-liquid mixer, 4 is a tee, 31 is a gas-liquid mixer body, 32-1 is a first diverging element, 32-2 is a second diverging element, 33 is a gas-liquid mixture inlet, 34 is a gas-liquid mixture outlet, 35 is a first cover, 36 is a second cover, 37 is a packing, 38 is a heat exchange interlayer, 39 is a heat exchange medium inlet, 40 is a heat exchange medium outlet, 41 is a first flange, and 42 is a first flange. DETAILED DESCRIPTION

[0025] After extensive and in-depth research, the inventors of the present application found that a packed column can be used to mix gaseous raw materials and liquid raw materials in a continuous flow reaction process on a small laboratory scale. Adding diverging elements with a porous structure at the front and rear ends of the packed column can further improve the mixing effect of the gaseous raw materials and liquid raw materials in the continuous flow reaction. Moreover, the temperature of the gas-liquid mixture can be conveniently adjusted by providing a heat exchange interlayer on the outside of the mixer body. In particular, when the mixing of the gas raw materials and the liquid raw materials releases heat, the utilization rate of the gas raw material and the mixing effect of the gas raw materials and the liquid raw materials can be improved by lowering the temperature of the mixture.

[0026] In a specific embodiment of the present invention, the liquid pipeline and the gas pipeline of the gas-liquid mixing device are connected to the gas-liquid mixer body through a tee, that is, the liquid material provided by the liquid pipeline and the gas material provided by the gas pipeline are mixed after first contacting in the tee. Preferably, the gas-liquid mixture inlet of the liquid pipeline, the gas pipeline, the tee and the gas-liquid mixer body have the same size, for example, the inner diameter is 3mm to 10mm. In a specific embodiment, the inner diameter of the liquid pipeline and the gas pipeline is 6mm, the inner diameter of each pipeline of the tee is 6mm, and the length of each pipeline is 0.25m. In another specific embodiment, the inner diameter of the liquid pipeline and the gas pipeline is 10mm, the inner diameter of each pipeline of the T-shaped tee (tees of other shapes can also be used in the present invention) is 10mm, and the length of each pipeline is 0.5m.

[0027] The diverging element is a porous material, including but not limited to nickel foam, microporous filter elements, filter cotton, filter screens, etc. Preferably, the pore size of the diverging element is 100 to 250 mesh. The diverging element can be fixed to both ends of the mixer body by conventional means in the art. For example, the diverging element can be embedded in the interior of the gas-liquid mixer body and then covered with a lid or flange, or the diverging element can be located at both ends of the gas-liquid mixer body and fixed with a lid or flange to prevent the diverging element from falling off, thereby ensuring stable operation of the gas-liquid mixing process.

[0028] The first diverging element is used for performing a second mixing of the gas material and the liquid material flowing therethrough through its own micropores.

[0029] The gas-liquid mixer body can be made of metal materials such as SS316L, HC276, titanium, and tantalum. Suitable liquid raw materials for such metal-based gas-liquid mixer bodies include, but are not limited to, lower alcohols, tetrahydrofuran, ethyl acetate, n-heptane, acetonitrile, and dichloromethane. Suitable gas raw materials include, but are not limited to, oxygen, nitrogen, hydrogen, ammonia, ethylene, and carbon dioxide. The gas-liquid mixer body is used to perform a third mixing of the gaseous and liquid materials. The gas-liquid mixer body is preferably cylindrical. The inner diameter of the gas-liquid mixer body can be adjusted according to actual needs, for example, between 2 cm and 10 cm.

[0030] The main body of the gas-liquid mixer is filled with fillers, and there are many gaps between the fillers. When the liquid material and the gas material pass through the gaps of these fillers, there is a large enough surface area for full contact, thereby increasing the mixing uniformity of the gas material and the liquid material, and avoiding problems such as low yield due to poor gas-liquid mixing during continuous flow reactions. Fillers suitable for the present invention include but are not limited to glass ball fillers, glass spring fillers, spherical molecular sieve fillers, etc. The maximum size of the filler is 1mm to 15mm, and the size here refers to the maximum length of the filler. For spherical fillers such as glass ball fillers and spherical molecular sieve fillers, the maximum size is the diameter, and for cylindrical fillers such as glass spring fillers, the maximum size is generally its height.

[0031] The second diverging element is similar to the first diverging element and is used to mix the gaseous material and the liquid material flowing through it for the fourth time through its own micropores. The material of the second diverging element can be the same as that of the first diverging element or different.

[0032] The outer wall of the mixer is provided with a heat exchange interlayer with an annular cross section. In a specific embodiment of the present invention, the equivalent diameter of the annular cavity interface is 1.5 cm to 2.5 cm.

[0033] The gas-liquid mixing device of the present utility model has at least the following beneficial effects:

[0034] 1. The gas-liquid mixing device of the present invention performs the first mixing of the gas-liquid mixture through the tee, the second mixing of the gas-liquid mixture through the first diverging element, the third mixing of the gas-liquid mixture through the gas-liquid mixer body, and the fourth mixing of the gas-liquid mixture through the first diverging element, so that the gas raw material and the liquid raw material are fully mixed.

[0035] 2. The utility model can meet the different requirements of continuous flow reaction on raw material temperature by providing a heat exchange interlayer on the main body of the gas-liquid mixer. Moreover, in the case of heat release during the mixing process of gas raw materials and liquid raw materials, the temperature of the raw materials can be reduced to improve the utilization rate of the gas raw materials and the mixing effect of the gas raw materials and liquid raw materials.

[0036] 3. The gas-liquid mixing device of the present invention has a simple structure and can be sized accordingly according to the scale of the continuous flow reaction, thereby meeting the simultaneous use of small-scale, pilot-scale and industrial-scale continuous flow reaction processes.

[0037] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the selected technologies, the following briefly introduces the drawings required for the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without inventive work. The various devices described in the present invention (including components whose specific structures are not described) are all universal standard accessories, and their structures and principles are known to those skilled in the art through technical manuals or conventional experimental methods.

[0038] Example 1

[0039] like Figure 1 As shown, the gas-liquid mixing device of this embodiment includes a liquid pipeline 1, a gas pipeline 2, a gas-liquid mixer 3, and a tee 4. The liquid pipeline 1 is used to provide a liquid raw material, the gas pipeline 2 is used to provide a gas raw material, and the gas-liquid mixer 3 is used to thoroughly mix the liquid raw material provided by the liquid pipeline and the gas raw material provided by the gas pipeline. The tee 4 is used to connect the liquid pipeline 1, the gas pipeline 2, and the gas-liquid mixer 3.

[0040] The gas-liquid mixer 3 includes a gas-liquid mixer body 31, a first diverging element 32-1, a second diverging element 32-2, a gas-liquid mixture inlet 33 and a gas-liquid mixture outlet 34. The first diverging element 32-1 and the second diverging element 32-2 are respectively embedded in the interior of the gas-liquid mixer body 31 and are located at both ends. A first cover 35 and a second cover 36 are also installed at both ends of the gas-liquid mixer body 31 (sealing gaskets can be provided inside the first cover 35 and the second cover 36 to enhance the sealing effect). The first cover 35 and the second cover 36 can be installed on the gas-liquid mixer body 31 by threads. The gas-liquid mixture inlet 33 is integrally formed with the first cover 35, and the gas-liquid mixture outlet 34 is integrally formed with the second cover 36. The gas-liquid mixture inlet 33 can also be formed together with the tee 4. Glass ball filler is installed inside the gas-liquid mixer body 31 to increase the contact area and contact time of the gas raw material and the liquid raw material flowing through the gas-liquid mixer body 31, thereby improving the mass transfer effect. A heat exchange layer 38 is provided on the outside of the gas-liquid mixer body 31. The heat exchange layer 38 has a circular cross-section and is filled with a heat exchange medium. The heat exchange layer 38 is provided with a heat exchange medium inlet 39 and a heat exchange medium outlet 41. Depending on actual needs, the heat exchange medium can be tap water or coolant.

[0041] During use, the liquid raw material and the gas raw material enter the tee 4 through the liquid pipeline 1 and the gas pipeline 2 respectively, undergo the first mixing in the tee 4, then enter the first diverging element 32-1 through the gas-liquid mixture inlet 33, and then enter the interior of the gas-liquid mixer body 31. When the gas-liquid mixture passes through the first diverging element 32-1, the pores inside the dispersion element fully disperse the gas raw material and the liquid raw material, allowing the two to mix for a second time. The gas-liquid mixture mixed by the first diverging element 32-1 enters the filler gaps inside the gas-liquid mixer body 31. During the flow process, the gas raw material and the liquid raw material are fully mixed for a third time due to the sufficient disturbance of these fillers. The gas-liquid mixture flowing out of the gas-liquid mixer body 31 passes through the second diverging element 32-2 for the fourth mixing, and finally flows out from the gas-liquid mixture outlet 34, enters the continuous flow reactor, and participates in the continuous flow reaction.

[0042] As the gaseous and liquid feedstocks flow through the gas-liquid mixer body 31, the temperature of the gas-liquid mixture can be adjusted by setting the temperature of the heat exchange medium within the heat exchange interlayer 38 to meet the temperature requirements of the reactants for the continuous flow reaction. If significant heat release occurs during the mixing of the gaseous and liquid feedstocks, the heat exchange medium within the heat exchange interlayer 38 can be used to lower their temperatures, thereby improving mixing.

[0043] Example 2

[0044] See also Figure 2 The structure of the gas-liquid mixing device shown in this figure is basically the same as Figure 1 The devices shown are similar in construction and like parts are numbered likewise, differing only in that the internal packing of the gas-liquid mixer body is a glass spring.

[0045] Figure 3 The gas-liquid mixing device shown is similar to Figure 2 The internal filler of the gas-liquid mixer body is also a glass spring.

[0046] Example 3

[0047] See also Figure 4 The structure of the gas-liquid mixing device shown in this figure is basically the same as Figure 1 The structures of the devices shown are similar, with like components being numbered the same. The only difference is that in this embodiment, the first diverging element 32-1 and the second diverging element 32-2 are fixedly mounted on both ends of the gas-liquid mixer body 31 using first and second flanges 41, 42, respectively. The first and second covers 35, 36 respectively cover the first and second flanges 41, 42 and are secured to the gas-liquid mixer 3 using screws and nuts. The first and second covers 35, 36 can also be secured to the gas-liquid mixer 3 using other common mechanical connection methods, such as clamps.

[0048] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the scope of the technical concept of this new invention. The technical scope of this utility model is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. A gas-liquid mixing device, characterized in that: The gas-liquid mixing device includes a liquid pipeline, a gas pipeline and a gas-liquid mixer. The liquid pipeline is used to provide liquid raw materials, the gas pipeline is used to provide gas raw materials, and the gas-liquid mixer is used to fully mix the liquid raw materials provided by the liquid pipeline and the gas raw materials provided by the gas pipeline. The gas-liquid mixer includes a gas-liquid mixer body, a first diverging element, a second diverging element, a gas-liquid mixture inlet and a gas-liquid mixture outlet. The first diverging element and the second diverging element are respectively arranged at both ends of the gas-liquid mixer body. The gas-liquid mixer body is filled with fillers. The gas-liquid mixture entering the gas-liquid mixer through the gas-liquid mixture inlet passes through the first diverging element, the gas-liquid mixer body and the second diverging element in sequence for mixing, and then flows out from the gas-liquid mixture outlet.

2. The gas-liquid mixing device according to claim 1, characterized in that: The gas-liquid mixing device further comprises a tee, and the tee is used to connect the liquid pipeline, the gas pipeline and the gas-liquid mixer.

3. The gas-liquid mixing device according to claim 2, characterized in that: The tee is T-shaped.

4. The gas-liquid mixing device according to claim 1, characterized in that: The first diverging element and the second diverging element are each independently selected from one of foam nickel, microporous filter element, filter cotton, and filter mesh.

5. The gas-liquid mixing device according to claim 4, characterized in that: The apertures of the first diverging element and the second diverging element are 100-250 meshes.

6. The gas-liquid mixing device according to claim 1 or 2, characterized in that: A heat exchange interlayer is provided on the outside of the gas-liquid mixer body for absorbing heat released during the mixing of the liquid raw material and the gas raw material or cooling the gas-liquid mixture.

7. The gas-liquid mixing device according to claim 6, characterized in that: The cross section of the heat exchange interlayer is annular, and heat exchange medium is filled inside. The heat exchange interlayer is provided with a heat exchange liquid inlet and a heat exchange liquid outlet.

8. The gas-liquid mixing device according to claim 1 or 2, characterized in that: The gas-liquid mixer body is cylindrical.

9. The gas-liquid mixing device according to claim 1 or 2, characterized in that: The filler is selected from glass ball filler, glass spring filler or spherical molecular sieve filler, and the maximum size of the filler is 1mm to 15mm.

10. The gas-liquid mixing device according to claim 1 or 2, characterized in that: The first diverging element and the second diverging element are fixedly mounted at both ends of the gas-liquid mixer body, and a first cover integrally formed with the gas-liquid mixture inlet and a second cover integrally formed with the gas-liquid mixture outlet are detachably mounted at both ends of the gas-liquid mixer body and cover the first diverging element and the second diverging element, respectively; or The diameters of the first diverging element and the second diverging element are the same as the outer diameter of the gas-liquid mixer body, and they are fixed to the two ends of the gas-liquid mixer body through a first flange and a second flange respectively. A first cover integrally formed with the gas-liquid mixture inlet and a second cover integrally formed with the gas-liquid mixture outlet cover the first flange and the second flange respectively and are detachably mounted on both ends of the gas-liquid mixer body.

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