Liquid-liquid homogeneous mixing device

Abstract

The utility model relates to a liquid-liquid homogeneous phase mixing device which comprises a first pipe body, a pipe assembly and a fourth pipe body, a first material inlet is formed in one end of the first pipe body, and the caliber of one end of the first pipe body is larger than that of the other end of the first pipe body; the pipe assembly comprises a second pipe body and a third pipe body, one end of the second pipe body is connected with the other end of the first pipe body, the third pipe body is arranged in the second pipe body to form a material channel between the second pipe body and the third pipe body, a second material inlet is formed in the second pipe body corresponding to the material channel, and one end, close to the first material inlet, of the material channel is blocked; one end of the fourth pipe body is connected with the other end of the second pipe body, the other end of the fourth pipe body forms a mixed material outlet, and the caliber of one end of the fourth pipe body is smaller than that of the other end. According to the utility model, the instantaneous speed of the first material is increased, the feeding mode of the annular second material is matched, and the second material is simultaneously mixed with the first material at the outer ring and the inner ring, so that the mixing time of the two materials can be greatly shortened, and the yield of reactants is improved.

Description

Technical Field

[0001] The utility model relates to a mixing device, in particular to a liquid-liquid homogeneous mixing device. Background Art

[0002] High-temperature reactants and low-temperature reactants are usually unstable substances themselves. High-temperature reactants tend to self-polymerize or decompose when the temperature rises, while low-temperature reactants usually need to be stored at low temperatures. When these two liquid substances need to be mixed, if the residence time required for the mixing of the two materials is too long, the yield and selectivity will be greatly reduced.

[0003] Static mixer is a kind of high-efficiency mixing equipment without moving parts. It can change the flow state of fluid in the tube by using the mixing unit fixed in the tube to achieve good dispersion and sufficient mixing between different fluids. For liquid-liquid homogeneous mixing, static mixer is generally the first choice. However, the residence time required for complete mixing of static mixer is relatively long. For unstable reactants, if they are not completely mixed with another high-temperature substance, they are easy to self-polymerize or decompose, which will produce a large number of by-products, thus affecting the yield.

[0004] Venturi ejectors are widely used in chemical industry and other fields. The principle of Venturi ejectors is to suck gas into the throat through negative pressure, so that gas and liquid mix with each other. Summary of the invention

[0005] The utility model aims to provide a mixing device which can be applied to liquid-liquid homogeneous mixing reactions such as diazotization reactions.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A liquid-liquid homogeneous mixing device, comprising:

[0008] First tube body: one end of the first tube body forms a first material inlet, and the diameter of one end of the first tube body is larger than the diameter of the other end;

[0009] Tube assembly: The tube assembly includes a second tube body and a third tube body, one end of the second tube body is connected to the other end of the first tube body, the third tube body is arranged inside the second tube body to form a material channel therebetween, a second material inlet is provided on the second tube body corresponding to the material channel, and the material channel is blocked at one end close to the first material inlet;

[0010] Fourth tube body: one end of the fourth tube body is connected to the other end of the second tube body, the other end of the fourth tube body forms a mixing outlet, and the caliber of one end of the fourth tube body is smaller than the caliber of the other end.

[0011] Preferably, the third tube body is provided with a plurality of holes, the holes connecting the material channel and the interior of the third tube body, and the diameter D of the holes is 孔 The hole is 1-2 mm, and the material entering from the second material inlet can be diverted to quickly mix the two fluids and improve the mixing efficiency.

[0012] Preferably, the diameter D of the second material inlet is 二进 is the diameter D of the second tube 2 0.1-0.3 times, preferably, D 二进 =0.3D 2 .

[0013] Preferably, the length L of the first tube is 1 is the first material inlet diameter D 1 4-5 times of that.

[0014] Preferably, the diameter D of the second tube is 2 is the first material inlet diameter D 1 0.2-0.4 times, preferably, D 2 =1 / 3D 1 .

[0015] Preferably, the diameter D of the third tube is 3 is the diameter D of the second tube 2 0.3-0.4 times, preferably, D 3 =0.4D 2 .

[0016] Preferably, the diameter D of the first material inlet is 一进 The diameter D of the mixing outlet 出 equal.

[0017] Preferably, in the above technical solution, the diameter of the first tube gradually decreases from one end to the other end.

[0018] Preferably, in the above technical solution, the diameter of the fourth tube gradually increases from one end thereof to the other end thereof.

[0019] Preferably, in the above technical solution, the second tube body and the third tube body are coaxially arranged, that is, the third tube body is located at the center of the second tube body, and the widths of the material channels are consistent.

[0020] Preferably, the above technical solution comprises a first feed pipe, a second feed pipe and a discharge pipe, wherein the first feed pipe is connected to the first feed port; the second feed pipe is connected to the second material inlet, and the second feed pipe is perpendicular to the second tube body; and the discharge pipe is connected to the mixing outlet.

[0021] Preferably, in the above technical solution, the cross-sections of the first tube body, the second tube body, the third tube body and the fourth tube body are circular.

[0022] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:

[0023] The utility model is based on the Venturi ejector principle, and increases the instantaneous speed of the first material by gradually contracting the first tube body. At the same time, in conjunction with the feeding method of the annular second material, the second material can be mixed with the first material at the outer ring as well as the first material at the inner ring, which can greatly shorten the mixing time of the two materials, reduce the risk of the reactant being unstable and affecting the reaction yield, and increase the yield of the reactant. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Attached Figure 1 It is a front view schematic diagram of the liquid-liquid homogeneous mixing device of the utility model;

[0025] Attached Figure 2 It is a cross-sectional schematic diagram of the second tube body and the third tube body of the utility model.

[0026] In the above attached figure:

[0027] 1. First tube body; 10. First material inlet;

[0028] 20, second tube body; 200, second material inlet; 21, third tube body; 210, hole; 22, material channel; 220, plugging;

[0029] 3. The fourth pipe body; 30. Mixing outlet;

[0030] 40. First feed pipe; 41. Second feed pipe; 42. Discharge pipe. DETAILED DESCRIPTION

[0031] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention 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 cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0033] like Figure 1 The liquid-liquid homogeneous mixing device shown comprises a first tube body 1, a tube assembly and a fourth tube body 3, and the two ends of the tube assembly are respectively connected to the first tube body 1 and the fourth tube body 3 to form a whole. Specifically:

[0034] One end of the first tube body 1 forms a first material inlet 10, and the diameter of one end of the first tube body 1 is larger than that of the other end. In this embodiment, the diameter of the first tube body 1 gradually decreases from one end to the other end, and the first tube body 1 is a tapered tube with a circular cross-section.

[0035] In addition, a section of the first feed pipe 40 may be connected to the first material inlet 10 , and the first feed pipe 40 may be a straight pipe.

[0036] The tube assembly includes a second tube body 20 and a third tube body 21. In this embodiment, the second tube body 20 and the third tube body 21 are straight tubes with circular cross-sections. Among them, one end of the second tube body 20 is connected to the other end of the first tube body 1; the third tube body 21 is arranged inside the second tube body 20 to form a material channel 22 between the two. A second material inlet 200 is provided on the second tube body 20 corresponding to the material channel 22. The material channel 22 is blocked 220 at one end close to the first material inlet 10. That is to say, the material entering from the first material inlet 10 passes through one end of the third tube body 21, and the material entering from the second material inlet 200 passes through the material channel 22 between the second tube body 20 and the third tube body 21. The two are mixed at the other end of the third tube body 21, which can greatly shorten the mixing time of the two materials and reduce the self-polymerization or decomposition of the materials due to the long mixing time, thereby affecting the reaction yield.

[0037] In this embodiment, the second tube body 20 and the third tube body 21 are coaxially arranged, that is, the third tube body 21 is located at the center of the second tube body 20, and the width of the material channel 22 is consistent. The third tube body 21 can be arranged near one end of the second tube body 20, and the second material inlet 200 can be opened at the position of the material channel 22 near one end of the plug 220.

[0038] In a preferred implementation of this embodiment: a plurality of holes 210 are provided on the third tube body 21, and the holes 210 connect the material channel 22 and the interior of the third tube body 21. The holes 210 can divert the material entering from the second material inlet 200. A portion of the material enters the second tube body 20 through the holes 210 and is mixed first, and the other portion of the material passes through the material channel 22 and is mixed again, so that the two fluids can be mixed quickly and the mixing efficiency can be improved. The hole 210 can be a circular hole with a diameter D 孔 The plurality of holes 210 may be staggered, for example, 8*3, 24 in total.

[0039] In addition, a second feed pipe 41 may be connected to the second material inlet 200. The second feed pipe 41 is connected to the second material inlet 200. In the figure, the second feed pipe 41 is perpendicular to the second tube body 20. The second feed pipe 41 may be a straight tube.

[0040] One end of the fourth tube body 3 is connected to the other end of the second tube body 20 , and the other end of the fourth tube body 3 forms a mixing outlet 30 . The diameter of one end of the fourth tube body 3 is smaller than that of the other end, and the fourth tube body 3 is a gradually expanding tube with a circular cross section.

[0041] In addition, a section of discharge pipe 42 may be connected to the mixing outlet 30 , and the discharge pipe 42 may be a straight pipe.

[0042] In this embodiment, the following parameters can be set to better mix the materials quickly, specifically:

[0043] The length L of the first tube 1 1 The first material inlet diameter is 10 D 1 4-5 times of that.

[0044] Diameter D of the second tube body 20 2 The first material inlet diameter is 10 D 1 0.2-0.4 times, preferably, D 2 =1 / 3D 1 , to ensure the flow rate of materials passing through.

[0045] Diameter D of the second material inlet 200 二进 is the diameter D of the second tube 20 2 0.1-0.3 times of D 二进 =0.3D 2 .

[0046] Diameter D of the third tube body 21 3 is the diameter D of the second tube 20 2 0.3-0.4 times, preferably, D 3 =0.4D 2 .

[0047] The diameter D of the first material inlet 10 一进 The diameter D of the mixing outlet 30 出 equal.

[0048] Example:

[0049] A liquid-liquid homogeneous mixing device with the following parameters is used:

[0050] The length L of the first tube 1 1 =500mm; diameter D of the first material inlet 10 1 =120mm;

[0051] The length L of the second tube 20 2 =200mm; the diameter D of the second tube 20 2 =40mm, diameter D of the second material inlet 200 二进 =12mm;

[0052] The length L of the third tube 21 2 =60mm; the diameter D of the third tube 21 3 =16mm;

[0053] The first tube body 3 has the same shape as the first tube body 1 and is symmetrical.

[0054] Nitrous acid (high temperature reactant) is introduced into the first material inlet 10, and aniline (low temperature reactant) is introduced into the second material inlet 200, and the yield of the product benzene diazonium salt is 95%.

[0055] Comparative Example:

[0056] A conventional static mixer was used to introduce nitrous acid and aniline separately for mixing, and the final yield of the product was 89%.

[0057] Obviously, the yield of the product after mixing using the liquid-liquid homogeneous mixing device of this embodiment can be increased by 6% compared with that of the conventional static mixer.

[0058] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A liquid-liquid homogeneous mixing device, characterized in that: include: First tube body: one end of the first tube body forms a first material inlet, and the diameter of one end of the first tube body is larger than the diameter of the other end; Tube assembly: The tube assembly includes a second tube body and a third tube body, one end of the second tube body is connected to the other end of the first tube body, the third tube body is arranged inside the second tube body to form a material channel therebetween, a second material inlet is provided on the second tube body corresponding to the material channel, and the material channel is blocked at one end close to the first material inlet; Fourth tube body: one end of the fourth tube body is connected to the other end of the second tube body, the other end of the fourth tube body forms a mixing outlet, and the caliber of one end of the fourth tube body is smaller than the caliber of the other end.

2. The liquid-liquid homogeneous mixing device according to claim 1, characterized in that: The third tube body is provided with a plurality of holes, the holes connecting the material channel and the interior of the third tube body, and the diameter of the holes is D 孔 1-2mm.

3. The liquid-liquid homogeneous mixing device according to claim 1, characterized in that: The diameter D of the second material inlet 二进 It is 0.1-0.3 times the diameter D2 of the second tube.

4. The liquid-liquid homogeneous mixing device according to claim 1, characterized in that: The length L1 of the first tube body is 4-5 times the diameter D1 of the first material inlet.

5. The liquid-liquid homogeneous mixing device according to claim 1, characterized in that: The diameter D2 of the second tube body is 0.2-0.4 times the diameter D1 of the first material inlet.

6. The liquid-liquid homogeneous mixing device according to claim 1, characterized in that: The diameter D3 of the third tube body is 0.3-0.4 times the diameter D2 of the second tube body.

7. The liquid-liquid homogeneous mixing device according to claim 1, characterized in that: The diameter D of the first material inlet 一进 The diameter D of the mixing outlet 出 are equal; and / or The diameter of the first tube gradually decreases from one end to the other end; and / or The diameter of the fourth tube gradually increases from one end to the other end.

8. The liquid-liquid homogeneous mixing device according to claim 1, characterized in that: The second tube body and the third tube body are coaxially arranged.

9. The liquid-liquid homogeneous mixing device according to claim 1, characterized in that: The mixing device also includes a first feed pipe, a second feed pipe and a discharge pipe, the first feed pipe is connected to the first material inlet; the second feed pipe is connected to the second material inlet, and the second feed pipe is perpendicular to the second tube body; the discharge pipe is connected to the mixing outlet.

10. The liquid-liquid homogeneous mixing device according to claim 1, characterized in that: The cross sections of the first tube body, the second tube body, the third tube body and the fourth tube body are circular.

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