Overhead tank dropwise adding reaction device

Abstract

The utility model discloses a head tank dropwise adding reaction device, and belongs to the technical field of dropwise adding reaction. Comprising a head tank and a reaction kettle, a dispersing device is arranged in the reaction kettle, and a sealed transfer box, a motor and a piston pump are arranged at the upper end of the outer surface; the dispersing device comprises a first disperser and a second disperser, and the second disperser is fixed at the lower end of the first disperser; the head tank is arranged at the upper end of the reaction kettle and is connected with the piston pump through a first discharge control pipe. According to the utility model, the prepolymer enters the reaction kettle from the elevated tank, and is uniformly combined with materials in reaction through multiple dispersion of the dispersion device, so that the phenomenon that the prepolymer is not diffused enough to cause non-uniform reaction, local reaction and further generate solid clusters is avoided, in addition, the reaction efficiency can be greatly improved through multiple dispersion, and the operation is convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of dripping reaction, and in particular relates to a high-level tank dripping reaction device. Background Art

[0002] The reaction mechanism of amino resin and isocyanate is to generate a condensation product (urea, etc.) and a cyclization reaction to produce a quaternary ammonium salt, and finally generate a high molecular weight polyurethane. During the reaction, the double bond of isocyanate reacts with the amino group in the amino resin to form an open-ring complex. This substance can generate polyurethane by providing a catalyst and heating. The product of the reaction of amino resin and isocyanate has high mechanical and chemical properties. They can be used as raw materials for coatings, adhesives, printing inks, polyurethane foams, epoxy resin modifications and other products. Due to its excellent wear resistance, corrosion resistance, high temperature stability and chemical stability, it is widely used in construction, automobiles, electronics, furniture and other industries.

[0003] However, isocyanate prepolymer and amino resin complete an instantaneous reaction in the reactor. Currently, the addition of prepolymer to the reactor is completed by single-channel dripping. The liquid drips into the reactor relatively concentratedly and quickly, and is often reacted before it has time to diffuse, resulting in uneven mixing of the reaction liquid in the reactor. The prepolymer cannot diffuse in time, resulting in uneven reaction, forming a local reaction, and then producing a solid mass phenomenon, affecting product quality.

[0004] Therefore, it is necessary to provide a high-level tank drop reaction device so that the isocyanate prepolymer can be well and evenly dispersed in the reaction kettle, fully and quickly react with the amino resin, improve the reaction efficiency, and reduce losses. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a high-level tank dripping reaction device for dealing with the current problems that isocyanate prepolymer and amino resin react rapidly in the reactor, resulting in uneven mixing, local reaction, and solid agglomeration.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A high-level tank dripping reaction device comprises a high-level tank and a reactor, wherein a dispersion device is arranged inside the reactor, and a sealed transfer box, a motor and a piston pump are arranged at the upper end of the outer surface; the dispersion device comprises a first disperser and a second disperser, and the second disperser is fixed at the lower end of the first disperser; the high-level tank is arranged at the upper end of the reactor and is connected to the piston pump through a first discharge control pipe.

[0008] Furthermore, the first disperser is in a circular shape, a first dripping hole is provided on the surface of the circular ring, and a first hollow tube is fixedly connected to the inside of the circular ring; the first hollow tube is connected to the sealed transfer box through a second hollow tube.

[0009] Furthermore, the second disperser is in a circular ring shape, a second dripping hole is provided on the surface of the ring, and a third hollow tube is fixedly connected to the inside of the ring; the third hollow tube is connected to the first disperser through a fourth hollow tube.

[0010] Furthermore, a first gear is provided at the lower end of the sealed transfer box, and the first gear is fixedly sleeved on the outer surface of the second hollow tube.

[0011] Furthermore, the first gear is provided with an eccentric circular groove on the upper surface with the second hollow tube as the center.

[0012] Furthermore, a second gear is provided at the output end of the motor.

[0013] Furthermore, the second gear is meshingly connected with the first gear.

[0014] Furthermore, the output end of the piston pump is connected to the upper end of the rolling rod; the outlet of the piston pump is connected to the sealed transfer box through a second discharge control pipe.

[0015] Furthermore, a ball corresponding to the eccentric circular groove is arranged on one side of the lower end of the rolling rod.

[0016] Furthermore, a meter and a first one-way valve are provided on the first discharge control pipe.

[0017] Beneficial effects of the utility model:

[0018] (1) Prepolymer is evenly dispersed: The utility model calculates the flow rate through the liquid in the high-level tank through the meter, and the motor drives the second gear to rotate, thereby driving the first gear to rotate. The output end of the piston pump slides inside the eccentric circular groove through the rolling rod, thereby driving the piston pump to extend and retract to extract liquid into the sealed transfer box, and then guide the liquid out through the dripping hole through the dispersion device. At the same time, the second hollow tube drives the stirring shaft to stir the inside of the reactor to avoid uneven reaction caused by insufficient diffusion of the prepolymer, forming a local reaction, and then generating a solid mass phenomenon.

[0019] (2) After multiple dispersions, the reaction efficiency is improved: The dispersion device of the utility model is composed of a first disperser and a second disperser. The second disperser is connected to the first disperser through a fourth hollow tube. The prepolymer in the high-level tank flows from the second hollow tube to the first hollow tube through a sealed transfer box. A portion of the liquid passing through the first hollow tube is evenly dispersed into the reactor from the first dripping hole, while the other portion of the liquid flows into the second disperser through the fourth hollow tube, and is evenly dispersed in the reactor again through the secondary dispersion of the second disperser. After multiple dispersions, the utility model has a more uniform contact with the liquid in the reactor, prevents the solid mass phenomenon, improves the reaction efficiency, and accelerates the reaction process.

[0020] (3) Simple and convenient operation, reducing costs: The utility model uses a motor as a power source to drive the first gear and the second gear to rotate, so that the rolling rod slides inside the eccentric circular groove of the first gear, thereby driving the movable plug to extend and retract to extract the liquid in the high-level tank; at the same time, when the first gear rotates, the second hollow tube will also rotate, thereby driving the stirring shaft to move, stirring the liquid while it is being distributed in the reactor, which is more conducive to the dispersion of the liquid, and only one motor is needed to operate the utility model, which is simple to operate and reduces costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the first disperser of the utility model;

[0023] Figure 3 It is a structural schematic diagram of the first gear of the utility model;

[0024] Figure 4 It is a schematic diagram of the enlarged structure of part A of the utility model;

[0025] Figure 5 It is a schematic diagram of the structure of the dispersion device of the utility model;

[0026] Figure 6 It is a structural schematic diagram of the piston pump and the rolling rod of the utility model.

[0027] In the figure: 1. high-level tank; 2. metering device; 3. first one-way valve; 4. first disperser; 5. stirring shaft; 6. reactor; 7. first dripping hole; 8. first hollow tube; 9. first gear; 10. eccentric circular groove; 11. second hollow tube; 12. piston pump; 13. sealed transfer box; 14. motor; 15. rolling rod; 16. second gear; 17. second one-way valve; 18. fourth hollow tube; 19. second disperser; 20. second dripping hole; 21. third hollow tube; 22. first discharge control tube; 23. second discharge control tube; 24. ball. DETAILED DESCRIPTION

[0028] The technical solution of the present invention will be clearly and completely described below in conjunction with the drawings in the present invention. In addition, the forms of the various structures recorded in the following embodiments are merely illustrative, and the present invention is not limited to the various structures recorded in the following embodiments. All other implementations obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0029] like Figure 1-5 As shown, the utility model provides a high-level tank drop reaction device, including a high-level tank 1 and a reactor 6, wherein a dispersion device is provided inside the reactor 6, and a sealed transfer box 13, a motor 14 and a piston pump 12 are provided at the upper end of the outer surface; the dispersion device includes a first disperser 4 and a second disperser 19, and the second disperser 19 is fixed at the lower end of the first disperser 4; the high-level tank 1 is arranged at the upper end of the reactor 6, and is connected to the piston pump 12 through a first discharge control pipe 22. The first disperser 4 is in the shape of a ring, and a first drop hole 7 is provided on the surface of the ring, and a first hollow tube 8 is fixedly connected inside the ring; the first hollow tube 8 is connected to the sealed transfer box 13 through a second hollow tube 11. The second disperser 19 has the same structure as the first disperser 4, and is in the shape of a ring, and a second drop hole 20 is provided on the surface of the ring, and a third hollow tube 21 is fixedly connected inside the ring; the third hollow tube 21 is connected to the first disperser 4 through a fourth hollow tube 18. The motor 14 is powered on, so that the second gear 16 connected to its output end rotates, driving the first gear 9 to rotate. The rotation of the first gear 9 causes the rolling rod 15 to slide inside the eccentric circular groove 10 of the first gear 9, thereby driving the movable plug of the piston pump 12 to extend and retract to extract the liquid in the high-level tank 1. The liquid enters the sealed transfer box 13 through the outlet of the piston pump 12, and then flows into the first hollow tube 8 from the second hollow tube 11 under the action of gravity, and then flows into the first disperser 4 ring from the first hollow tube 8. A part of the liquid is dispersed into the reactor through the first dripping hole 7, and the other part of the liquid flows into the third hollow tube 21 through the fourth hollow tube 18 under the action of gravity, and then flows into the ring of the second disperser 19, and is dispersed again through the second dripping hole 20 and evenly sprinkled inside the reactor; at the same time, when the first gear 9 rotates, the second hollow tube 11 will also rotate, and the second hollow tube 11 will drive the stirring shaft 5 to rotate, and continuously stir while dripping the liquid to prevent the formation of local reactions and the formation of solid clumps.

[0030] like Figure 1 and Figure 4As shown, the first gear 9 is provided at the lower end of the sealed transfer box 13, and the first gear 9 is fixedly sleeved on the outer surface of the second hollow tube 11. The upper end of the second hollow tube 11 is connected to the sealed transfer box 13, and the lower end passes through the reactor 6 and extends to the inside to be connected and connected to the first hollow tube 8. The liquid entering the sealed transfer box 13 flows through the second hollow tube 11 and the first hollow tube 8 under the action of gravity, and then passes through the first disperser 4 and the second disperser 19 for multiple dispersions and is evenly dispersed inside the reactor.

[0031] The output end of the motor 14 is provided with a second gear 16. After the power is turned on, the motor drives the first gear 9 to rotate by rotating the second gear 16, which can not only allow the liquid in the high-level tank 1 to be extracted into the sealed transfer box 13 through the piston pump 12, but also drive the second hollow tube 11 and the stirring shaft 5 to rotate, so as to achieve stirring of the reaction raw materials while dropping, killing two birds with one stone, saving resources, facilitating operation, and further preventing the prepolymer from being diffused in time to cause uneven reaction, forming a local reaction, and then generating a solid mass phenomenon.

[0032] The first gear 9 is centered on the second hollow tube 11, and an eccentric circular groove 10 is arranged on the upper surface; the lower end of the rolling rod 15 is arranged in the eccentric circular groove 10, and corresponding balls 24 are arranged on either side in contact with the eccentric circular groove 10. When the first gear 9 rotates, the rolling rod 15 moves in the eccentric circular groove 10 driven by the balls 24; and the upper end of the rolling rod 15 is connected to the output end of the piston pump 12, and the movement of the rolling rod 15 will drive the piston pump 12 to extend and retract to extract liquid into the sealed transfer box 13. At the same time, when the first gear 9 rotates, it will drive the second hollow tube 11 to rotate, and the rotation of the second hollow tube 11 will drive the stirring shaft 5 to move, and stirring will be performed while dripping.

[0033] The second gear 16 is meshed and connected with the first gear 9, and the second gear 16 is connected to the output end of the motor 14. The rotation of the motor drives the second gear 16, and the second gear 16 is meshed and connected with the first gear 9, which drives the first gear 9 to rotate, thereby providing power to enable the high-level tank dripping reaction device to operate normally.

[0034] like Figure 1 , Figure 4 and Figure 6 As shown, the output end of the piston pump 12 is connected to the upper end of the rolling rod 15; the outlet of the piston pump 12 is connected to the sealed transfer box 13 through the second discharge control tube 23, and the output end of the piston pump 12 drives the piston pump 12 to extend and retract through the sliding of the rolling rod 15 on the first gear 9, thereby extracting the liquid in the high-level tank 1 and entering the sealed transfer box 13 through the outlet of the piston pump 12, thereby completing the titration.

[0035] A metering device 2 and a first one-way valve 3 are provided on the first discharge control pipe 22. When the liquid in the high-level tank 1 passes through the piston pump 12, the flow rate needs to be calculated by the metering device 2. Titration can be performed only after the first one-way valve 3 is opened. This is to accurately add the titration amount and prevent excessive titration of the prepolymer from causing insufficient diffusion in the reactor, resulting in local reactions and affecting the reaction process and efficiency.

[0036] A second one-way valve 17 is provided on the second discharge control pipe 23 , one end of which is connected to the outlet of the piston pump 12 , and the other end is connected to the inside of the sealed transfer box 13 . When the second one-way valve 17 is opened, the liquid extracted by the piston pump 12 enters the sealed transfer box 13 through the second discharge control pipe 23 .

[0037] like Figure 1 , Figure 2 and Figure 5 As shown, the first disperser 4 is in a circular shape, with a first dripping hole 7 provided on the surface of the circular ring, and a first hollow tube 8 is fixedly connected inside the circular ring; the first hollow tube 8 is connected to the sealed transfer box 13 through the second hollow tube 11, and communicates with the inside of the circular ring of the first disperser 4. The prepolymer flows into the first hollow tube 8 through the second hollow tube 11, and the rotation of the second hollow tube 11 causes the first hollow tube 8 to rotate as well. Under the action of centrifugal force, the liquid flows from the first hollow tube 8 into the circular ring of the first disperser 4, and a part of the liquid is dispersed into the interior of the reactor through the first dripping hole 7, thereby achieving the purpose of dispersing the prepolymer.

[0038] The second disperser 19 has the same structure as the first disperser 4, and is in a circular ring shape. It is evenly fixed at the lower end of the first disperser 4, and at least four are set. The surface of the circular ring is provided with a second dripping hole 20, and the third hollow tube 21 is fixedly connected inside the circular ring; the third hollow tube 21 is connected to the first disperser 4 through the fourth hollow tube 18, and the fourth hollow tube 18 is connected to the third hollow tube 21 and the circular ring of the first disperser 4. If the liquid is dispersed only through the first disperser 4, the dispersion area is too small, and the prepolymer cannot be fully contacted with the raw materials in the reactor. Therefore, after a part of the liquid is dispersed through the first disperser 4, the other part of the liquid flows into the third hollow tube 21 through the fourth hollow tube 18. Under the action of centrifugal force, the liquid flows into the circular ring and is dispersed again inside the reactor through the second dripping hole 20, which increases the dispersion area and makes the prepolymer better contact with the raw materials in the reactor. Furthermore, the liquids passing through the first disperser 4 and the second disperser 19 are titrated into the reaction kettle in batches, and titrated and stirred in steps, which further increases the reaction efficiency and prevents local reactions and the formation of solid agglomerates.

[0039] The method of using the utility model is as follows: the motor 14 is powered on, so that the second gear 16 connected to the output end thereof rotates, driving the first gear 9 to rotate. The rotation of the first gear 9 causes the rolling rod 15 to slide inside the eccentric circular groove 10 of the first gear 9, thereby driving the movable plug of the piston pump 12 to extend and retract to extract the liquid in the high-level tank 1. The liquid enters the sealed transfer box 13 through the outlet of the piston pump 12, and then flows into the first hollow tube 8 from the second hollow tube 11 under the action of gravity, and then flows into the first disperser 4 ring from the first hollow tube 8. A part of the liquid is dispersed into the reactor through the first dripping hole 7, and another part of the liquid flows into the third hollow tube 21 through the fourth hollow tube 18 under the action of gravity, and then flows into the ring of the second disperser 19, and is dispersed again through the second dripping hole 20 and evenly sprinkled inside the reactor; at the same time, when the first gear 9 rotates, the second hollow tube 11 will also rotate, and the second hollow tube 11 will drive the stirring shaft 5 to rotate, and continuously stir while dripping the liquid to prevent the formation of local reactions and the formation of solid mass phenomena. And when operating, it is necessary to first calculate the flow rate through the meter 2 to control the amount of dripping. The liquid passing through the first disperser 4 and the second disperser 19 is titrated into the reactor in batches, and the titration and stirring are performed step by step, which increases the dispersion area, makes the prepolymer better contact with the raw materials in the reactor, further increases the reaction efficiency, prevents local reactions and the formation of solid agglomerates, and is easy to operate.

[0040] The above are only preferred implementations of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A high-level tank dripping reaction device, characterized in that: The invention comprises a high-level tank (1) and a reaction kettle (6), wherein a dispersion device is provided inside the reaction kettle (6), and a sealed transfer box (13), a motor (14) and a piston pump (12) are provided at the upper end of the outer surface; the dispersion device comprises a first disperser (4) and a second disperser (19), and the second disperser (19) is fixed at the lower end of the first disperser (4); the high-level tank (1) is arranged at the upper end of the reaction kettle (6), and is connected to the piston pump (12) through a first discharge control pipe (22).

2. The high-level tank dripping reaction device according to claim 1 is characterized in that: The first disperser (4) is in the shape of a ring, a first dripping hole (7) is provided on the surface of the ring, and a first hollow tube (8) is fixedly connected inside the ring; the first hollow tube (8) is connected to the sealed transfer box (13) via a second hollow tube (11).

3. The high-level tank dripping reaction device according to claim 1 is characterized in that: The second disperser (19) is in the shape of a ring, a second dripping hole (20) is provided on the surface of the ring, and a third hollow tube (21) is fixedly connected to the inside of the ring; the third hollow tube (21) is connected to the first disperser (4) through a fourth hollow tube (18).

4. The high-level tank dripping reaction device according to claim 1 is characterized in that: A first gear (9) is provided at the lower end of the sealed transfer box (13), and the first gear (9) is fixedly sleeved on the outer surface of the second hollow tube (11).

5. The high-level tank dripping reaction device according to claim 4 is characterized in that: The first gear (9) takes the second hollow tube (11) as the center of the circle, and an eccentric circular groove (10) is provided on the upper surface.

6. The high-level tank dripping reaction device according to claim 1 is characterized in that: The output end of the motor (14) is provided with a second gear (16).

7. The high-level tank dripping reaction device according to claim 6 is characterized in that: The second gear (16) is meshingly connected with the first gear (9).

8. The high-level tank dripping reaction device according to claim 1 is characterized in that: The output end of the piston pump (12) is connected to the upper end of the rolling rod (15); the outlet of the piston pump (12) is connected to the sealed transfer box (13) through a second discharge control pipe (23).

9. The high-level tank dripping reaction device according to claim 8, characterized in that: A ball (24) corresponding to the eccentric circular groove (10) is arranged on one side of the lower end of the rolling rod (15).

10. The high-level tank dripping reaction device according to claim 1, characterized in that: The first discharge control pipe (22) is provided with a meter (2) and a first one-way valve (3).

Images