Mixing system, application thereof and liquid material mixing method

Abstract

The invention belongs to the technical field of liquid-liquid mixing, and particularly relates to a mixing system, application thereof and a liquid material mixing method. The mixing system comprises a small-flow material conveying unit, a large-flow material conveying pipeline and a mixing pipeline, wherein the large-flow material conveying pipeline is connected with the small-flow material conveying unit in parallel; the small-flow material conveying unit comprises a conveying pump 1 and an atomizer 2 which are sequentially connected in series; and the small-flow material conveying unit and the large-flow material conveying pipeline are respectively connected with the mixing pipeline in series. According to the invention, the small-flow material is atomized to form tiny liquid drops, and then the small liquid drops are uniformly dispersed into one phase of the large-flow material, so that the two materials which are not easy to mutually dissolve are uniformly mixed in a short time, and the mixing method is simple and easy to operate and has relatively high mixing efficiency.

Description

Technical Field

[0001] The present invention belongs to the technical field of liquid-liquid mixing, and particularly relates to a mixing system and its application, and a method for mixing two immiscible liquid materials. Background Art

[0002] Proper mixtures of fluids or reagents have many applications. In industrial, agricultural, food safety, pharmaceutical, and chemical applications, it may be necessary to mix two fluids in a given amount before application. Most existing fluid mixing is carried out using static mixers or dynamic mixers, and currently, when mixing two fluid materials, they are mostly mixed in a manner where the volume flow ratios are similar, or the volume flow ratio of the material with a large flow rate to the material with a small flow rate is less than 20:1. However, when the volume flow rates of the two-phase materials to be mixed differ greatly (more than 20:1) during the actual production process, it is difficult to mix the two materials evenly. Summary of the Invention

[0003] In view of this, the present invention provides a mixing system and its application, and a method for mixing liquid materials. The mixing system provided by the present invention can evenly mix two liquid materials with a volume flow ratio of 20 - 6720:1.

[0004] To solve the above technical problems, the present invention provides a mixing system, including a small-flow material conveying unit, a large-flow material conveying pipeline parallel to the small-flow material conveying unit, and a mixing pipeline;

[0005] The small-flow material conveying unit includes a conveying pump 1 and an atomizer 2 connected in series in sequence;

[0006] The small-flow material conveying unit and the large-flow material conveying pipeline are respectively connected in series with the mixing pipeline.

[0007] Preferably, a static mixer 3 is provided in the mixing pipeline.

[0008] Preferably, a large-flow material storage tank 6 is provided at the inlet of the large-flow material conveying pipeline.

[0009] Preferably, a mixed material storage tank 7 is provided at the outlet of the static mixer 3.

[0010] Preferably, a filter 4 is provided at the inlet of the conveying pump 1, and a small-flow material storage tank 5 is provided at the inlet of the filter 4.

[0011] The present invention also provides the application of the above technical solution of the mixing system in mixing large-flow materials and small-flow materials, and the volume flow ratio of the large-flow materials and the small-flow materials is 20 - 6720:1.

[0012] The present invention also provides a method for mixing liquid materials using the mixing system described in the above technical solution, including the following steps:

[0013] Pressurize the small-flow material through the delivery pump 1 and atomize it using the atomizer 2 to obtain an atomized small-flow material;

[0014] Mix the atomized small-flow material and the large-flow material in the mixing pipeline to obtain a mixed material;

[0015] The volume flow rate of the small-flow material is above 2.5 L / h, and the volume flow rate ratio of the small-flow material to the large-flow material is 1:20 to 6720.

[0016] Preferably, when a static mixer 3 is provided in the mixing pipeline, the atomized small-flow material and the large-flow material are mixed in the static mixer 3.

[0017] Preferably, the droplet diameter of the atomized small-flow material is 1 to 50 μm.

[0018] Preferably, the pressure difference of the atomizer after being pressurized by the delivery pump 1 is above 0.1 MPa;

[0019] The atomized coverage area is conical. When the atomizer is installed perpendicular to the pipeline, the atomization height is greater than the diameter of the installed pipeline. When the atomizer is installed horizontally with the pipeline, the atomization diameter is greater than the diameter of the installed pipeline, and the spray angle is 70 to 90°.

[0020] The present invention provides a mixing system, including a small-flow material delivery unit, a large-flow material delivery pipeline parallel to the small-flow material delivery unit, and a mixing pipeline; the small-flow material delivery unit includes a delivery pump 1 and an atomizer 2 connected in series in sequence; the small-flow material delivery unit and the large-flow material delivery pipeline are respectively connected in series with the mixing pipeline. The present invention atomizes the small-flow material to form tiny droplets, and then evenly disperses the small droplets into a large-flow material phase, thereby mixing two immiscible materials evenly in a short time. The mixing method is simple and easy to operate and has a high mixing efficiency. Description of the Drawings

[0021] Figure 1 It is a schematic structural diagram of the mixing system provided by the present invention; where 1 is the delivery pump and 2 is the atomizer;

[0022] Figure 2 It is a schematic structural diagram of the mixing system provided by the present invention; where 1 is the delivery pump, 2 is the atomizer, and 3 is the static mixer;

[0023] Figure 3Schematic structural diagram of the hybrid system used in the embodiment; where 1 is a transfer pump, 2 is an atomizer, 3 is a static mixer, 4 is a filter, 5 is a small-flow material storage tank, 6 is a large-flow material storage tank, and 7 is a mixed material storage tank. Detailed implementation mode

[0024] The present invention provides a hybrid system, including a small-flow material transfer unit, a large-flow material transfer pipeline parallel to the small-flow material transfer unit, and a mixing pipeline;

[0025] The small-flow material transfer unit includes a transfer pump 1 and an atomizer 2 connected in series in sequence;

[0026] The small-flow material transfer unit and the large-flow material transfer pipeline are respectively connected in series with the mixing pipeline.

[0027] As a specific implementation mode of the present invention, the hybrid system includes a small-flow material transfer unit, and the small-flow material transfer unit includes a transfer pump 1 and an atomizer 2 connected in series in sequence; the transfer pump 1 can be a positive displacement pump; a filter 4 is provided at the inlet of the transfer pump 1, and a small-flow material storage tank 5 is provided at the inlet of the filter 4. The present invention has no special limitation on the diameter of the spray holes of the atomizer, and it can be selected according to the flow rate of the small-flow material.

[0028] As a specific implementation mode of the present invention, a large-flow material storage tank 6 is provided at the inlet of the large-flow material transfer pipeline, and a transfer pump can be provided at the inlet or outlet of the large-flow material storage tank 6.

[0029] As a specific implementation mode of the present invention, a static mixer 3 is provided in the mixing pipeline; a mixed material storage tank 7 is provided at the outlet of the static mixer 3. As a specific implementation mode of the present invention, the mixer 3 can be a static mixer; the present invention has no special requirements for the static mixer, and a conventional static mixer in the art can be used. Figure 1 and Figure 2 is a schematic structural diagram of the hybrid system provided by the present invention, where 1 is a transfer pump, 2 is an atomizer, and 3 is a static mixer.

[0030] The present invention also provides the application of the hybrid system described in the above technical solution in mixing large-flow materials and small-flow materials, and the volume flow ratio of the large-flow material and the small-flow material is 20-6720:1, which can be 50-500:1, can also be 100-400:1, and can further be 200-300:1.

[0031] The present invention also provides a method for mixing liquid materials using the hybrid system described in the above technical solution, including the following steps:

[0032] Pressurize the small-flow material through the transfer pump 1 and atomize it using the atomizer 2 to obtain the atomized small-flow material;

[0033] Mix the atomized small-flow material and the large-flow material in the mixing pipeline to obtain the mixed material;

[0034] The volume flow rate of the small-flow material is 2.5 L / h or more, and the volume flow rate ratio of the small-flow material to the large-flow material is 1:20 to 6720.

[0035] In the present invention, the small-flow material is pressurized through the transfer pump 1 and then atomized using the atomizer 2 to obtain the atomized small-flow material. As a specific embodiment of the present invention, the small-flow material may include an alkali solution, and the alkali solution may include an aqueous NaOH solution, an aqueous Na2CO3 solution, or an aqueous NaHCO3 solution; the mass concentration of the alkali solution may be 10% or more, and may also be 10 to 20%. As a specific embodiment of the present invention, the flow rate of the small-flow material is 2.5 L / h or more, and may be 3 to 10 L / h; the volume flow rate ratio of the small-flow material to the large-flow material is 1:20 to 6720, and may be 1:50 to 500, may also be 1:100 to 400, and may further be 1:200 to 300.

[0036] As a specific embodiment of the present invention, before the small-flow material enters the transfer pump, it may further include: filtering the small-flow material through the filter 4. The present invention can remove impurities in the small-flow material through filtration to avoid clogging the atomizer 2.

[0037] As a specific embodiment of the present invention, the pressure difference of the atomizer after pressurization by the transfer pump 1 may be 0.1 MPa or more, may also be 1.0 to 3.0 MPa, and may further be 2.0 to 3.0 MPa; the present invention adjusts the pressure of the small-flow material transfer and the pressure of the large-flow material transfer to control the pressure difference of the atomizer. As a specific embodiment of the present invention, the coverage area of the atomization may be conical. When the atomizer is installed perpendicular to the pipeline, the atomization height may be greater than the diameter of the installation pipeline. The present invention has no special requirements for the range where the atomization height is larger than the diameter of the large-flow material transfer pipeline, as long as it is larger than the diameter of the large-flow material transfer pipeline; when the atomizer is installed horizontally with the pipeline, the atomization diameter may be greater than the diameter of the installation pipeline. The present invention has no special requirements for the range where the atomization diameter is larger than the diameter of the large-flow material transfer pipeline, as long as it is larger than the diameter of the large-flow material transfer pipeline; the spray angle of the atomization may be 70 to 90°, and may specifically be 70°, 75°, 80°, 85°, or 90°. As a specific embodiment of the present invention, the droplet diameter of the atomized small-flow material may be 1 to 50 μm, and may also be 10 to 40 μm.

[0038] After obtaining the atomized small flow material, the present invention mixes the atomized small flow material and the large flow material in a mixing pipe to obtain a mixed material. As a specific embodiment of the present invention, the large flow material may include an organic acid solution, and the organic acid solution may include isopropylbenzene, acetic acid solution or propionic acid solution containing formic acid; the mass concentration of the organic acid solution may be 20 to 6500 mg / kg, or 100 to 500 mg / kg, and may specifically be 6.5 g / kg, 20 mg / kg or 400 mg / kg. As a specific embodiment of the present invention, when a static mixer 3 is provided in the mixing pipe, the atomized small flow material and the large flow material are mixed in the static mixer 3. As a specific embodiment of the present invention, the mixed material obtained by the mixing can be stored in a mixed material storage tank 7.

[0039] The mixing method provided by the present invention has high mixing efficiency and can evenly mix two-phase materials with a large volume flow ratio. This method uses a combination of pressurized injection and a static mixer to mix the two phases. The pressurized liquid flow with a small volume flow is atomized and sprayed into a fluid with a large volume flow, which is then atomized and dispersed into the stream with a large volume flow. The stream is then further mixed in the static mixer to obtain a uniformly mixed material. Because atomization is performed before mixing, two phases with a large volume flow ratio can still be fully mixed, and the mixing efficiency is high.

[0040] In order to further illustrate the present invention, the technical solutions provided by the present invention are described in detail below in conjunction with the embodiments, but they should not be construed as limiting the scope of protection of the present invention.

[0041] Example 1 (volume flow ratio of low flow material to high flow material is 1:336)

[0042] use Figure 3 The mixing system of the structure shown is used to mix cumene containing formic acid with a mass concentration of 400 mg / kg and a NaOH aqueous solution with a mass concentration of 10%. The specific steps are as follows:

[0043] A NaOH aqueous solution having a mass concentration of 10% is conveyed from a small flow material storage tank 5 at a flow rate of 2.53 L / h via a delivery pump 1 (positive displacement pump) at 40° C. and 2.0 MPa to a filter 4 for filtration, and then conveyed to an atomizer 2 for atomization (the pressure difference of the atomizer is 1.0 MPa, the atomized coverage area can be conical, the coverage area diameter is greater than 100 mm, the height is greater than 100 mm, and the spray angle is 90°) to obtain an atomized small flow material; and the atomized small flow material is conveyed to a static mixer 3;

[0044] Cumene formate with a mass concentration of 400 mg / kg is transported from the large-flow material storage tank 6 through a conveying pipeline (with a diameter of 20 mm) at a flow rate of 850 L / h under the conditions of 40 °C and 1.0 MPa (transported under pressure from the front-end pipeline) and enters the static mixer 3 to be mixed with the atomized small-flow material. The obtained mixed material is stored in the mixed material storage tank 7.

[0045] Example 2 (the volume flow ratio of the small-flow material to the large-flow material is 1:6719)

[0046] Using Figure 3 The mixing system with the structure shown is used to mix cumene formate with a mass concentration of 20 mg / kg and an aqueous NaOH solution with a mass concentration of 10%. The specific steps are as follows:

[0047] The small-flow material aqueous NaOH solution with a mass concentration of 10% is transported from the small-flow material storage tank 5 at a flow rate of 2.53 L / h via a delivery pump 1 (positive displacement pump) under the conditions of 40 °C and 2.0 MPa, enters the filter 4 for filtration, and then is transported to the atomizer 2 for atomization (the pressure difference of the atomizer is 1.0 MPa. The atomized coverage area can be conical, with a coverage area diameter greater than 100 mm, a height greater than 100 mm, and a spray angle of 90°), obtaining the atomized small-flow material; the atomized small-flow material is transported to the static mixer 3;

[0048] Cumene formate with a mass concentration of 20 mg / kg is transported from the large-flow material storage tank 6 through a conveying pipeline (with a diameter of 100 mm) at a flow rate of 17000 L / h under the conditions of 40 °C and 1.0 MPa (transported under pressure from the front-end pipeline) and enters the static mixer 3 to be mixed with the atomized small-flow material. The obtained mixed material is stored in the mixed material storage tank 7.

[0049] Example 3 (the volume flow ratio of the small-flow material to the large-flow material is 1:21)

[0050] Using Figure 3 The mixing system with the structure shown is used to mix cumene formate with a mass concentration of 6.5 g / kg and an aqueous NaOH solution with a mass concentration of 10%. The specific steps are as follows:

[0051] The small-flow material NaOH aqueous solution with a mass concentration of 10% is pumped from the small-flow material storage tank 5 at a flow rate of 2.53 L / h through a delivery pump 1 (positive displacement pump) at 40 °C and 2.0 MPa, and then filtered through a filter 4 and transported to an atomizer 2 for atomization (the pressure difference of the atomizer is 1.0 MPa, the coverage area of the atomization can be conical, the diameter of the coverage area is greater than 100 mm, the height is greater than 100 mm, and the spray angle is 90°) to obtain atomized small-flow material; the atomized small-flow material is transported to a static mixer 3;

[0052] Cumene formate with a mass concentration of 6.5 g / kg is transported from a large-flow material storage tank 6 through a delivery pipeline (with a diameter of 10 mm) at a flow rate of 52.3 L / h at 40 °C and 1.0 MPa (transported with pressure in the front pipeline) and enters the static mixer 3 to be mixed with the atomized small-flow material, and the obtained mixed material is stored in a mixed material storage tank 7.

[0053] Example 4 (the volume flow ratio of the small-flow material to the large-flow material is 1:336)

[0054] Using Figure 3 a mixing system with the shown structure to mix cumene formate with a mass concentration of 400 mg / kg and a NaOH aqueous solution with a mass concentration of 10%, and the specific steps are as follows:

[0055] The small-flow material NaOH aqueous solution with a mass concentration of 10% is pumped from the small-flow material storage tank 5 at a flow rate of 2.53 Lg / h through a delivery pump 1 (positive displacement pump) at 40 °C and 1.1 MPa, and then filtered through a filter 4 and transported to an atomizer 2 for atomization (the pressure difference of the atomizer is 0.1 MPa, the coverage area of the atomization can be conical, the diameter of the coverage area is greater than 100 mm, the height is greater than 100 mm, and the spray angle is 90°) to obtain atomized small-flow material; the atomized small-flow material is transported to a static mixer 3;

[0056] Cumene formate with a mass concentration of 400 mg / kg is transported from a large-flow material storage tank 6 through a delivery pipeline (with a diameter of 20 mm) at a flow rate of 850 L / h at 40 °C and 1.0 MPa (transported with pressure in the front pipeline) and enters the static mixer 3 to be mixed with the atomized small-flow material, and the obtained mixed material is stored in a mixed material storage tank 7.

[0057] Example 5 (the volume flow ratio of the small-flow material to the large-flow material is 1:336)

[0058] Using Figure 3The hybrid system with the shown structure mixes cumene formate with a mass concentration of 400 mg / kg and an aqueous NaOH solution with a mass concentration of 10%, and the specific steps are as follows:

[0059] The small-flow material aqueous NaOH solution with a mass concentration of 10% is transported from the small-flow material storage tank 5 at a flow rate of 2.53 L / h via the delivery pump 1 (positive displacement pump) under the conditions of 40 °C and 4.0 MPa, filtered in the filter 4, and then transported to the atomizer 2 for atomization (the pressure difference of the atomizer is 3.0 MPa, the coverage area of the atomization can be conical, the diameter of the coverage area is greater than 100 mm, the height is greater than 100 mm, and the spray angle is 90°) to obtain the atomized small-flow material; the atomized small-flow material is transported to the static mixer 3;

[0060] Cumene formate with a mass concentration of 400 mg / kg is transported from the large-flow material storage tank 6 at a flow rate of 850 L / h via the delivery pipeline (diameter: 20 mm) under the conditions of 40 °C and 1.0 MPa (transported under pressure in the front pipeline) and enters the static mixer 3 to be mixed with the atomized small-flow material, and the obtained mixed material is stored in the mixed material storage tank 7.

[0061] Example 6

[0062] Mix cumene formate containing formic acid and 10% aqueous NaOH solution according to the method of Example 1, except that there is no static mixer in the hybrid system, and the aqueous NaOH solution directly enters the atomizer 2 to be mixed with cumene formate containing formic acid after filtration during the mixing process.

[0063] Comparative Example 1

[0064] Mix cumene formate containing formic acid and 10% aqueous NaOH solution according to the method of Example 1, except that there is no atomizer in the hybrid system, and the aqueous NaOH solution directly enters the static mixer 3 to be mixed with cumene formate containing formic acid after filtration during the mixing process.

[0065] Comparative Example 2 (increased flow rate ratio)

[0066] Mix cumene formate containing formic acid and 10% aqueous NaOH solution according to the method of Example 1, except that cumene formate with a mass concentration of 10 mg / kg is transported from the large-flow material storage tank 6 at a flow rate of 34000 L / h via the delivery pipeline under the conditions of 40 °C and 1.0 MPa (transported under pressure in the front pipeline) and enters the static mixer 3 to be mixed with the atomized small-flow material.

[0067] Comparative Example 3 (low atomizer pressure difference)

[0068] Mix cumene containing formic acid and 10% NaOH aqueous solution according to the method of Example 1, except that the 10% small-flow material NaOH aqueous solution with a mass concentration is fed from the small-flow material storage tank 5 into the filter 4 for filtration at a flow rate of 2.53 L / h via the delivery pump 1 (positive displacement pump) under the conditions of 40°C and 1.05 MPa, and then transported to the atomizer 2 for atomization (the pressure difference of the atomizer is 0.05 MPa).

[0069] Comparative Example 4 (small spray angle)

[0070] Mix cumene containing formic acid and 10% NaOH aqueous solution according to the method of Example 1, except that the 10% small-flow material NaOH aqueous solution with a mass concentration is fed from the small-flow material storage tank 5 into the filter 4 for filtration at a flow rate of 2.53 L / h via the delivery pump 1 (positive displacement pump) under the conditions of 40°C and 2.0 MPa, and then transported to the atomizer 2 for atomization (the spray angle is 30°).

[0071] Comparative Example 5 (small spray angle)

[0072] Mix cumene containing formic acid and 10% NaOH aqueous solution according to the method of Example 1, except that the 10% small-flow material NaOH aqueous solution with a mass concentration is fed from the small-flow material storage tank 5 into the filter 4 for filtration at a flow rate of 2.53 L / h via the delivery pump 1 (positive displacement pump) under the conditions of 40°C and 2.0 MPa, and then transported to the atomizer 2 for atomization (the spray angle is 0°).

[0073] Use the titration method to detect the content of organic acids in the mixed materials obtained in Examples 1, 2, 3, 4, 5, 6 and Comparative Examples 1, 2, 3, 4, 5. No organic acids were detected in the mixed materials of Examples 1, 2, 3, 5; the content of organic acids in Examples 4 and 6 was 1 mg / kg, and the content of organic acids in the mixed material of Comparative Example 1 was 20 mg / kg ； The content of organic acids in the mixed material of Comparative Example 2 was 1 mg / kg; the content of organic acids in the mixed material of Comparative Example 3 was 10 mg / kg; the content of organic acids in the mixed material of Comparative Example 4 was 11 mg / kg; the content of organic acids in the mixed material of Comparative Example 5 was 98 mg / kg. The mixed and uniform acid-base materials are more likely to come into contact, which is conducive to the full acid-base neutralization reaction and less remaining organic acids. If the mixing is uneven and the reaction is not sufficient, more remaining organic acids will be present. According to the results of the content of organic acids in the mixed materials of the examples and comparative examples, it can be proved that the mixing system provided by the present invention can uniformly mix two materials with a large volume flow ratio.

[0074] Although the above embodiments have described the present invention in detail, they are only a part of the embodiments of the present invention, rather than all of them. People can also obtain other embodiments based on this embodiment without creative efforts, and these embodiments all fall within the protection scope of the present invention.

Claims

1. A hybrid system, characterized in that, It includes a small-flow material conveying unit, a large-flow material conveying pipeline parallel to the small-flow material conveying unit, and a mixing pipeline; The small-flow material conveying unit includes a conveying pump (1) and an atomizer (2) connected in series in sequence; The small-flow material conveying unit and the large-flow material conveying pipeline are respectively connected in series with the mixing pipeline.

2. The hybrid system according to claim 1, wherein A static mixer (3) is arranged in the mixing pipeline.

3. The hybrid system according to claim 1, wherein A large-flow material storage tank (6) is arranged at the inlet of the large-flow material conveying pipeline.

4. The hybrid system according to claim 1, wherein A mixed material storage tank (7) is arranged at the outlet of the static mixer (3).

5. The hybrid system according to claim 1, wherein A filter (4) is arranged at the inlet of the conveying pump (1), and a small-flow material storage tank (5) is arranged at the inlet of the filter (4).

6. Use of the hybrid system according to any one of claims 1 to 5 in hybridizing a large-flow material and a small-flow material, characterized in that, The volume flow ratio of the large-flow material to the small-flow material is 20 - 6720:

1.

7. A method for mixing liquid materials using the mixing system according to claim 1, characterized in that, It includes the following steps: Pressurize the small-flow material through the conveying pump (1) and atomize it using the atomizer (2) to obtain atomized small-flow material; Mix the atomized small-flow material and the large-flow material in the mixing pipeline to obtain mixed material; The volume flow rate of the small-flow material is above 2.5 L / h, and the volume flow ratio of the small-flow material to the large-flow material is 1:20 - 6720.

8. The liquid material mixing method according to claim 7, characterized in that, When a static mixer (3) is arranged in the mixing pipeline, the atomized small-flow material and the large-flow material are mixed in the static mixer (3).

9. The liquid material mixing method according to claim 7, characterized in that, The droplet diameter of the atomized small-flow material is 1 - 50 μm.

10. The liquid material mixing method according to claim 7 or 9, characterized in that, The pressure difference of the atomizer after being pressurized by the conveying pump (1) is above 0.1 MPa; The atomization coverage area is conical. When the atomizer and the pipeline are installed vertically intersecting, the atomization height is greater than the diameter of the installed pipeline. When the atomizer and the pipeline are installed horizontally, the atomization diameter is greater than the diameter of the installed pipeline, and the spray angle is 70 - 90°.

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