Preheating type reaction device for preparing dispersing agent

Abstract

The preheating type reaction device comprises a reaction kettle, a first jacket, a second jacket, a third jacket and a fourth jacket are sequentially arranged on the periphery of the reaction kettle from inside to outside, a first interlayer is formed between the first jacket and the reaction kettle, and a second interlayer is formed between the second jacket and the first jacket. A third interlayer is formed between the third jacket and the second jacket, and a fourth interlayer is formed between the fourth jacket and the third jacket; a normal-temperature cavity and a heating cavity are formed in the fourth interlayer; a first heating coil is mounted in the first interlayer; and a second heating coil is mounted in the heating cavity. During preheating, heating media in the first interlayer and the second interlayer are heated through the first heating coil, so that the reaction kettle is heated; meanwhile, a second heating coil heats a heating medium B in the heating cavity; after preheating is completed, during reaction heating, the heating medium B is conveyed into the first interlayer, so that the temperature of the reaction kettle is rapidly increased to the reaction temperature, and the preparation efficiency of the dispersing agent is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of dispersant preparation, in particular to a preheating reaction device for preparing dispersant. Background Art

[0002] Dispersant is a chemical that is added to water to increase its ability to remove particles. The role of dispersants is to use wetting dispersants to reduce the time and energy required to complete the dispersion process, stabilize the dispersed pigment dispersion, modify the surface properties of pigment particles, and adjust the mobility of pigment particles. It is specifically reflected in the following aspects: shorten the dispersion time, improve gloss, improve tinting power and hiding power, improve color development and color matching, prevent floating color, prevent flocculation, and prevent sedimentation. In our paint production process, pigment dispersion is a very important production link. It is directly related to the storage, construction, appearance and performance of the paint film, so the reasonable selection of dispersants is a very important production link. However, the quality of paint slurry dispersion is not only related to the dispersant, but also to the formulation of the paint formula and the selection of raw materials. Dispersants, as the name implies, are to reasonably disperse various powders in the solvent, and through a certain charge repulsion principle or polymer steric effect, various solids are stably suspended in the solvent (or dispersion).

[0003] The preparation of most dispersants requires preheating of the raw materials. For example, the patent with announcement number CN111499824B discloses a structured dispersant for UV inkjet and color paste and its preparation method steps. The preparation method includes the following steps: (1) under protective atmosphere conditions, the monomer B, the chain extender, the catalyst and the solvent are mixed, preheated, and then the monomer A is added to carry out polymerization reaction to obtain a polymer product liquid; (2) the end-capping agent is added to the polymer product liquid to carry out an end-capping reaction to obtain the dispersant. The preheating process is to preheat the material to 60-80°C; after the monomer B, chain extender, catalyst and solvent are mixed, preheating first can make the polymerization reaction more stable. The temperature of the polymerization reaction is 80-110°C; carrying out the polymerization reaction at a higher temperature can accelerate the reaction of residual monomers, which is beneficial to reducing the amount of residual monomers.

[0004] The preparation of existing dispersants is mostly done by heating the raw materials in a jacketed reactor. Since the preheating temperature is lower than the reaction temperature, the temperature needs to be raised to the reaction temperature after the preheating is completed, which takes a long time. The existing reaction device cannot quickly raise the preheating temperature to the reaction temperature, so it is necessary to improve it to improve the preparation efficiency of the dispersant.

[0005] It should be noted that the above contents belong to the technical knowledge of the inventor and do not necessarily constitute prior art. Utility Model Content

[0006] Based on this, it is necessary to provide a preheating reaction device for preparing a dispersant in order to solve the above technical problems.

[0007] In order to achieve the above-mentioned purpose, the utility model provides a preheating reaction device for preparing a dispersant, comprising a reactor, a discharge port is arranged at the bottom of the reactor, a discharge valve is installed at the lower end of the discharge port, a first jacket, a second jacket, a third jacket and a fourth jacket are arranged in sequence from the inside to the outside of the reactor, a first interlayer is formed between the first jacket and the reactor, a second interlayer is formed between the second jacket and the first jacket, a third interlayer is formed between the third jacket and the second jacket, and a fourth interlayer is formed between the fourth jacket and the third jacket; an opening is arranged at the upper end of the first jacket, The first interlayer is connected to the second interlayer through an opening; a partition is provided in the fourth interlayer, which divides the fourth interlayer into a normal temperature chamber located at the top and a heating chamber located at the bottom, a heat medium inlet is provided at the top of the normal temperature chamber, and the upper part of the heating chamber is connected to the upper part of the normal temperature chamber through a first connecting pipe; the bottom of the first interlayer is connected to the bottom of the fourth interlayer through a second connecting pipe, and a power pump is installed on the second connecting pipe; the bottom of the second interlayer is connected to the upper part of the normal temperature chamber through a third connecting pipe; a first heating coil is installed in the first interlayer; and a second heating coil is installed in the heating chamber.

[0008] Preferably, the lower portion of the normal temperature chamber is connected to the upper portion of the heating chamber via a fourth connecting pipe, and a fourth valve is installed on the fourth connecting pipe.

[0009] Preferably, a driving motor is installed on the top of the reactor, a stirring shaft is rotatably installed in the reactor, the upper end of the stirring shaft extends out of the reactor and is transmission-connected to the driving motor, a stirring blade and a spiral blade are sequentially installed on the lower part of the stirring shaft, and the spiral blade moves in the discharge port.

[0010] Preferably, a first valve and a second valve are installed on the second connecting pipe.

[0011] Preferably, a third valve and a temperature sensor are installed on the third connecting pipe.

[0012] Preferably, a liquid level meter is installed in the normal temperature chamber.

[0013] Preferably, the third interlayer is in a vacuum environment.

[0014] Preferably, the third interlayer is filled with heat insulating material.

[0015] The beneficial effects of the technical solution are as follows: during preheating, the heat medium A in the first interlayer and the second interlayer is heated by the first heating coil, and then the reactor is heated; at the same time, the second heating coil heats the heat medium B in the heating chamber, and the temperature of the heat medium A is higher than that of the heat medium B; after the preheating is completed, during reaction heating, the temperature of the heat medium in the first interlayer is rapidly increased by transporting the heat medium B into the first interlayer, and the temperature of the reactor is rapidly heated to the reaction temperature, thereby improving the preparation efficiency of the dispersant. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of an embodiment of the utility model;

[0017] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0018] In the figure, 1, reactor; 2, discharge port; 3, discharge valve; 4, first jacket; 5, second jacket; 6, third jacket; 7, fourth jacket; 8, first interlayer; 9, second interlayer; 10, third interlayer; 11, fourth interlayer; 12, opening; 13, partition; 14, normal temperature chamber; 15, heating chamber; 16, heat medium addition port; 17, first connecting pipe; 18, second connecting pipe; 19, power pump; 20, third connecting pipe; 21, first heating coil; 22, second heating coil; 23, fourth connecting pipe; 24, fourth valve; 25, drive motor; 26, stirring shaft; 27, stirring blade; 28, spiral blade; 29, first valve; 30, second valve; 31, third valve; 32, temperature sensor; 33, liquid level meter. DETAILED DESCRIPTION

[0019] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0020] See also Figure 1 and Figure 2The embodiment of the present application provides a preheating reaction device for preparing a dispersant, comprising a reactor 1, a feed port is provided at the top of the reactor 1, raw materials are added to the reactor 1 through the feed port, a discharge port 2 is provided at the bottom of the reactor 1, a discharge valve 3 is installed at the lower end of the discharge port 2, and the material in the reactor 1 is discharged through the discharge port 2 by opening the discharge valve 3; a driving motor 25 is installed at the top of the reactor 1, a stirring shaft 26 is rotatably installed in the reactor 1, the upper end of the stirring shaft 26 extends out of the reactor 1 and is connected to the driving motor 25 through a coupling, a stirring blade 27 and a spiral blade 28 are sequentially installed at the lower part of the stirring shaft 26, and the spiral blade 28 moves in the discharge port 2; the stirring shaft 26 is driven to rotate by the driving motor 25, and the material in the reactor 1 is stirred by the stirring blade 27 and the spiral blade 28, and the spiral blade 28 can stir the material in the feed port, drive the material in the feed port to move upward, avoid precipitation, and improve the reaction effect;

[0021] The first jacket 4, the second jacket 5, the third jacket 6 and the fourth jacket 7 are arranged in sequence from the inside to the outside of the reactor 1. The first jacket 4 and the reactor 1 form a first interlayer 8, the second jacket 5 and the first jacket 4 form a second interlayer 9, the third jacket 6 and the second jacket 5 form a third interlayer 10, and the fourth jacket 7 and the third jacket 6 form a fourth interlayer 11; the first jacket 4 has an opening 12 at the upper end, and the first interlayer 8 and the second interlayer 9 are connected through the opening 12; the fourth interlayer 11 is provided with a partition 13, and the partition 13 separates the fourth interlayer 1 1 is divided into a normal temperature chamber 14 at the top and a heating chamber 15 at the bottom. A heat medium inlet 16 is provided at the top of the normal temperature chamber 14. The upper part of the heating chamber 15 is connected to the upper part of the normal temperature chamber 14 through a first connecting pipe 17. The bottom of the first interlayer 8 is connected to the bottom of the fourth interlayer 11 through a second connecting pipe 18. A power pump 19 is installed on the second connecting pipe 18. The bottom of the second interlayer 9 is connected to the upper part of the normal temperature chamber 14 through a third connecting pipe 20. A first heating coil 21 is installed in the first interlayer 8. A second heating coil 22 is installed in the heating chamber 15. The lower part of the normal temperature chamber 14 is connected to the upper part of the heating chamber 15 through a fourth connecting pipe 23. A fourth valve 24 is installed on the fourth connecting pipe 23. A first valve 29 and a second valve 30 are installed on the second connecting pipe 18. A third valve 31 and a temperature sensor 32 are installed on the third connecting pipe 20.

[0022] The first interlayer 8, the second interlayer 9, and the heating chamber 15 are all filled with heat medium, which can be water or heat transfer oil. The heat medium in the first interlayer 8 and the second interlayer 9 is set to be heat medium A, and the heat medium in the heating chamber 15 is set to be heat medium B. The normal temperature chamber 14 initially stores less heat medium, which is convenient for the subsequent heat medium in the second interlayer 9 to enter.

[0023] The third interlayer 10 is a heat-insulating layer, which can keep the second interlayer 9 and the first interlayer 8 warm, thereby reducing the influence of the temperature of the fourth interlayer 11 on the temperatures of the second interlayer 9 and the first interlayer 8.

[0024] During preheating, the first heating coil 21 heats the heat medium A in the first interlayer 8 and the second interlayer 9, thereby heating the reactor 1; at the same time, the second heating coil 22 heats the heat medium B in the heating chamber 15, and the temperature of the heat medium A is higher than that of the heat medium B;

[0025] After the preheating is completed, when the reaction heating is carried out, the first valve 29, the second valve 30, the power pump 19 and the third valve 31 are opened, and the power pump 19 transports the heat medium B in the heating chamber 15 to the first interlayer 8 through the second connecting pipe 18. The volume of the first interlayer 8 is set to be small, so that the heat medium B can quickly fill the first interlayer 8, thereby quickly increasing the temperature of the heat medium in the first interlayer 8, and quickly heating the temperature of the reactor 1 to the reaction temperature; the heat medium in the first interlayer 8 enters the second interlayer 9 through the opening 12, and the heat medium at the bottom of the second interlayer 9 is relatively low, and can be pressed into the normal temperature chamber 14 through the third connecting pipe 20, and the temperature of the heat medium discharged from the second interlayer 9 is detected in real time by the temperature sensor 32. When the temperature detected by the temperature sensor 32 reaches the reaction temperature, it proves that the heat medium in the second interlayer 9 and the first interlayer 8 has reached the preset reaction temperature; then, the first valve 29, the second valve 30, the power pump 19 and the third valve 31 are closed and opened; the heat medium A in the first interlayer 8 and the second interlayer 9 is kept warm and heated by the first heating coil 21. Thus, the reactor 1 can be stably and quickly raised to the reaction temperature, thereby improving the preparation efficiency of the dispersant; through the heat medium addition port 16 and the first connecting pipe 17, the heating chamber 15 is connected to the atmosphere, which facilitates the transportation of the heat medium B.

[0026] After the reaction is completed, when the material in the reactor 1 needs to be cooled, the fourth valve 24 can be opened to introduce the heat medium in the normal temperature chamber 14 into the heating chamber 15. Since the temperature of the heat medium in the normal temperature chamber 14 is relatively low, the same as the principle of rapid heating mentioned above, the heat medium with a relatively low temperature in the heating chamber 15 can be transported to the first interlayer 8 through the power pump 19, and the reactor 1 can be cooled quickly.

[0027] In a preferred embodiment, in order to facilitate the detection of the liquid level in the normal temperature chamber 14, please refer to Figure 1 A liquid level meter 33 is installed in the normal temperature chamber 14. The liquid level in the normal temperature chamber 14 is detected by the liquid level meter 33 to prevent the liquid level in the normal temperature chamber 14 from being too high or too low.

[0028] In a preferred embodiment, to improve the heat insulation effect of the third interlayer 10, please refer to Figure 1In this embodiment, the third interlayer 10 is in a vacuum environment, which is achieved by evacuating. In other embodiments, the third interlayer 10 can also be filled with heat insulation materials to achieve the heat insulation function.

[0029] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0030] The above embodiments only express several implementation methods of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0033] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A preheating reaction device for preparing a dispersant, comprising a reaction kettle (1), a discharge port (2) being provided at the bottom of the reaction kettle (1), a discharge valve (3) being installed at the lower end of the discharge port (2), and characterized in that: The outer periphery of the reaction kettle (1) is provided with a first jacket (4), a second jacket (5), a third jacket (6) and a fourth jacket (7) in order from the inside to the outside; a first interlayer (8) is formed between the first jacket (4) and the reaction kettle (1); a second interlayer (9) is formed between the second jacket (5) and the first jacket (4); a third interlayer (10) is formed between the third jacket (6) and the second jacket (5); and a fourth interlayer (11) is formed between the fourth jacket (7) and the third jacket (6); an opening (12) is provided at the upper end of the first jacket (4); the first interlayer (8) and the second interlayer (9) are connected via the opening (12); a partition (13) is provided in the fourth interlayer (11); the partition (13) The fourth interlayer (11) is divided into a normal temperature chamber (14) located at the top and a heating chamber (15) located at the bottom. A heat medium inlet (16) is provided at the top of the normal temperature chamber (14). The upper part of the heating chamber (15) is connected to the upper part of the normal temperature chamber (14) via a first connecting pipe (17). The bottom of the first interlayer (8) is connected to the bottom of the fourth interlayer (11) via a second connecting pipe (18). A power pump (19) is installed on the second connecting pipe (18). The bottom of the second interlayer (9) is connected to the upper part of the normal temperature chamber (14) via a third connecting pipe (20). A first heating coil (21) is installed in the first interlayer (8). A second heating coil (22) is installed in the heating chamber (15).

2. The preheating reaction device for preparing a dispersant according to claim 1, characterized in that: The lower part of the normal temperature chamber (14) is connected to the upper part of the heating chamber (15) via a fourth connecting pipe (23), and a fourth valve (24) is installed on the fourth connecting pipe (23).

3. The preheating reaction device for preparing a dispersant according to claim 1, characterized in that: A driving motor (25) is installed on the top of the reactor (1), and a stirring shaft (26) is rotatably installed in the reactor (1). The upper end of the stirring shaft (26) extends out of the reactor (1) and is transmission-connected to the driving motor (25). A stirring blade (27) and a spiral blade (28) are installed in sequence on the lower part of the stirring shaft (26), and the spiral blade (28) moves in the discharge port (2).

4. The preheating reaction device for preparing a dispersant according to claim 1, characterized in that: A first valve (29) and a second valve (30) are installed on the second connecting pipe (18).

5. The preheating reaction device for preparing a dispersant according to claim 1, characterized in that: A third valve (31) and a temperature sensor (32) are installed on the third connecting pipe (20).

6. The preheating reaction device for preparing a dispersant according to claim 1, characterized in that: A liquid level meter (33) is installed in the normal temperature chamber (14).

7. The preheating reaction device for preparing a dispersant according to claim 1, characterized in that: The third interlayer (10) is in a vacuum environment.

8. The preheating reaction device for preparing a dispersant according to claim 1, characterized in that: The third interlayer (10) is filled with heat insulation material.

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