A wastewater-resistant polyurethane dispersion emulsifier

Abstract

This invention provides a wastewater-resistant polyurethane dispersion emulsifier, comprising an emulsifier body with several support legs fixed at the bottom. These support legs are arranged in a circular array, providing stable support. The emulsifier body contains an emulsification chamber, within which a rotor rotates. An input shaft is rotatably mounted at the bottom of the emulsification chamber. This design utilizes a circular array of bent rods that continuously abut against the inner wall of the emulsification chamber bottom, achieving a high-speed scraping effect. This completely solves the problem of material accumulation at the bottom of traditional equipment, ensuring all material is drawn into the shear flow field and improving material utilization. The bending structure of the bent rods, combined with high-speed rotation, generates extremely high shear force and turbulence near the contact point, particularly effective for strongly tearing and breaking high-viscosity polyurethane prepolymers, significantly reducing the particle size of the dispersion and narrowing the particle size distribution.

Description

Technical Field

[0001] This utility model relates to the field of emulsifier technology, specifically to a wastewater-resistant polyurethane dispersion emulsifier. Background Technology

[0002] In existing technologies, polyurethane dispersion emulsifiers are the core equipment for preparing waterborne polyurethane. Traditional emulsifiers often employ low-speed designs and rely on batch operations, resulting in problems such as material escape and uneven dispersion, leading to a wide particle size distribution and poor stability in the final product. Furthermore, when processing high-viscosity prepolymers, traditional equipment often suffers from insufficient shear force, leading to inadequate dispersion and affecting the material's resistance to wastewater.

[0003] Meanwhile, existing emulsifiers have problems such as uneven dispersion and low particle size control accuracy. Furthermore, if the internal rotor assembly cannot shear and stir the dead corners in the chamber, it will lead to a reduction in polyurethane dispersion efficiency and the problem of corner accumulation. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a wastewater-resistant polyurethane dispersion and emulsification machine, which solves the problems mentioned in the background section.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a wastewater-resistant polyurethane dispersion emulsifier, comprising an emulsifier body, wherein a plurality of body support legs are fixedly provided at the bottom of the emulsifier body, the body support legs being arranged in a circular array, the body support legs providing stable support; an emulsification chamber is provided inside the emulsifier body, a rotor is rotatably provided inside the emulsification chamber, an input shaft is rotatably provided at the bottom of the emulsification chamber, the input shaft being fixedly connected to the bottom of the rotor; a drive motor is installed at the bottom of the emulsifier body, the bottom of the input shaft being poweredly connected to the drive motor; a disc-shaped rotating top plate is fixedly provided on the outer end face of the top of the rotor; a plurality of bent rods are fixedly provided at the bottom of the rotating top plate, the bent rods being arranged in a circular array.

[0008] Preferably, the rotor has a plurality of through-holes that are connected vertically, and the through-holes are arranged in a ring array.

[0009] Preferably, a connecting sleeve cover is fitted onto the top of the rotor, and a sealing cavity is provided inside the connecting sleeve cover.

[0010] Preferably, a top sealing plate is installed at the center of the top of the emulsifying body, and a connecting pipe is provided at the top of the top sealing plate, with the bottom of the connecting pipe extending into the connecting sleeve cover.

[0011] Preferably, the connecting pipe is connected to an input pipe, and the bottom of the input pipe has a plurality of outward-facing input holes, which are arranged in a circular array.

[0012] Preferably, the top end of the input pipe extends outward and is connected to a material input port.

[0013] Preferably, an output valve is installed on one side of the bottom of the emulsifier body, and the output valve is connected to the bottom of the emulsification chamber.

[0014] (III) Beneficial Effects

[0015] This invention provides a wastewater-resistant polyurethane dispersion and emulsification machine. It has the following beneficial effects:

[0016] 1. This solution uses a ring-shaped array of bent rods that continuously abut against the inner wall of the bottom of the emulsification chamber to achieve a high-speed scraping effect, completely solving the problem of material accumulation at the bottom of the chamber in traditional equipment, ensuring that all materials are drawn into the shear flow field, and improving material utilization.

[0017] 2. This solution uses the bending structure of the bent rod combined with high-speed rotation to generate extremely high shear force and turbulence near the contact point, which is particularly effective for strong tearing and breaking of high-viscosity polyurethane prepolymers, significantly reducing the particle size of the dispersion and narrowing the particle size distribution.

[0018] 3. This solution achieves forced material pumping through the discharge through-holes of the annular array inside the rotor, forming a "suction-strong shearing-projection-mixing" cycle process. Secondary shearing and extrusion are completed in the narrow channel. Combined with the uniform material distribution through the top input hole, multiple efficient dispersions are achieved in a short time. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the external structure of this utility model;

[0020] Figure 2 This is a bottom view of the external structure of this utility model;

[0021] Figure 3 This is a top view of the structure of this utility model;

[0022] Figure 4 This utility model Figure 3 A cross-sectional view along the AA direction.

[0023] In the diagram: 101, Emulsifier body; 102, Body support legs; 103, Drive motor; 104, Material inlet; 105, Input pipe; 106, Connecting pipe; 107, Top sealing plate; 108, Input hole; 109, Sealed cavity; 110, Connecting sleeve cover; 111, Rotating top plate; 112, Discharge through hole; 113, Bending rod; 114, Input shaft; 115, Emulsifying chamber; 116, Rotor; 118, Output valve. Detailed Implementation

[0024] This utility model embodiment provides a wastewater-resistant polyurethane dispersion emulsifier, such as... Figure 1-4 As shown, the device includes an emulsifying body 101. Several body support legs 102 are fixedly arranged at the bottom of the emulsifying body 101, and these legs are arranged in a circular array to provide stable support. An emulsifying chamber 115 is provided inside the emulsifying body 101. A rotor 116 is rotatably mounted inside the emulsifying chamber 115. An input shaft 114 is rotatably mounted at the bottom of the emulsifying chamber 115 and is fixedly connected to the bottom of the rotor 116. A drive motor 103 is installed at the bottom of the emulsifying body 101, and the bottom of the input shaft 114 is poweredly connected to the drive motor 103. A disc-shaped rotating top plate 111 is fixedly mounted on the outer end face of the rotor 116. Several bent rods 113 are fixedly mounted at the bottom of the rotating top plate 111, and these bent rods are arranged in a circular array.

[0025] It should be further explained that the bottom of the bent rod 113 is curved, and the tail end of the bent rod 113 abuts against the inner wall of the bottom of the emulsification chamber 115.

[0026] It is worth further explaining that when the drive motor 103 starts, it can drive the input shaft 114 to rotate through the power connection, and then drive the rotor 116 to rotate through the mounting connection.

[0027] Furthermore, the rotor 116 is provided with a number of through-holes 112 that are connected vertically, and the positions of the through-holes 112 are distributed in a ring array.

[0028] Furthermore, a connecting sleeve cover 110 is fitted onto the top of the rotor 116, and a sealing cavity 109 is provided inside the connecting sleeve cover 110.

[0029] Furthermore, a top sealing plate 107 is installed at the center of the top of the emulsifying body 101, and a connecting pipe 106 is provided at the top of the top sealing plate 107. The bottom of the connecting pipe 106 extends into the connecting sleeve cover 110.

[0030] It should be further noted that a bearing washer is installed between the connecting sleeve cover 110 and the connecting pipe 106 to provide a sealing effect.

[0031] Furthermore, the connecting pipe 106 is connected to an input pipe 105, and the bottom of the input pipe 105 is provided with a number of outward-facing input holes 108, which are arranged in a ring array.

[0032] Furthermore, the top of the input pipe 105 extends outward and is connected to a material input port 104.

[0033] It should be further explained that the material input port 104 serves the function of material input.

[0034] Furthermore, an output valve 118 is installed on one side of the bottom of the emulsifying body 101, and the output valve 118 is connected to the bottom of the emulsifying chamber 115.

[0035] The usage method of this solution is as follows:

[0036] S1. Before starting the equipment, ensure that the emulsifier 101 is placed securely in the operating area, the power supply of the drive motor 103 is connected normally, and the output valve 118 is in the closed state.

[0037] The high-viscosity polyurethane prepolymer to be dispersed and other necessary components, such as deionized water, chain extender, neutralizer, etc., are introduced through the material inlet 104, and the material flows downward through the inlet pipe 105.

[0038] When the material flows through the input pipe 105, it flows out evenly and in multiple directions from the input holes 108 distributed in a ring array at its bottom, and enters the sealed cavity 109 of the connecting sleeve cover 110, thereby ensuring the initial dispersion and uniform entry of the material into the subsequent dispersion area, and reducing excessively high local concentrations.

[0039] S2. Start the drive motor 103. The drive motor 103 drives the input shaft 114 to rotate at high speed through the power connection.

[0040] The input shaft 114 drives the rotor 116, which is fixedly connected to it, to rotate at high speed in the emulsification chamber 115. At the same time, the rotating top plate 111 at the top of the rotor 116 also rotates at high speed.

[0041] The bent rods 113, which are fixedly arranged in a ring array at the bottom of the rotating top plate 111, rotate at high speed with the rotor 116.

[0042] At this time, because the bottom of the bent rod 113 is bent and its tail end is always in contact with the bottom inner wall of the emulsification chamber 115, they continuously and tightly scrape the bottom wall of the emulsification chamber 115 during high-speed rotation, completely eliminating the problem of material accumulation in the dead corner of the chamber bottom in traditional equipment, and ensuring that all materials are drawn into the shear flow field.

[0043] At the same time, the bending structure combined with high-speed rotation generates extremely high shear force and turbulence near the contact point and along the process, which is especially effective for strong tearing and breaking of high-viscosity prepolymers;

[0044] It pushes the bottom material upward and towards the main body area of ​​rotor 116.

[0045] S3. The material entering the emulsification chamber 115 is first subjected to severe shearing action on the surface of the rotor 116 and in the narrow gap between it and the chamber wall.

[0046] Under the action of centrifugal force, the material is thrown towards the outer edge of the rotor 116, and part of it is forced to be pumped or sucked from inside the rotor 116 to the area above it through the discharge through holes 112 distributed in a ring array. The design of the discharge through holes 112 realizes the forced internal circulation and multi-stage dispersion of the material.

[0047] The material is drawn in at high speed or pumped through the discharge port 112, where it undergoes a strong shearing and extrusion action within this narrow channel.

[0048] The material that passes through the discharge hole 112 is thrown back into the area below the rotating top plate 111, where it mixes again with the material that flows in from the connecting sleeve cover 110 and the material that is scraped up by the bending rod 113.

[0049] This enables a "suction-strong shear-projection-mixing" cycle, allowing for multiple and efficient dispersion and emulsification of materials in a very short time, significantly improving dispersion uniformity and effectively controlling the particle size and distribution width of the final dispersion.

[0050] S4. The bearing gasket between the connecting sleeve cover 110 and the connecting pipe 106 ensures the dynamic seal between the rotor 116, the rotating top plate 111, the connecting sleeve cover 110, the connecting pipe 106, and the top sealing plate 107, effectively preventing materials from escaping from the top under high pressure and high shear conditions, ensuring a clean working environment, and maintaining a stable operating pressure in the emulsification chamber 115.

[0051] S5. After undergoing high-speed shearing, circulating dispersion and emulsification for a set time in the emulsification chamber 115, the material reaches the required particle size distribution and stability requirements.

[0052] Turn off drive motor 103 to stop shearing.

[0053] When the output valve 118 is opened, the uniformly dispersed, narrowly distributed wastewater-resistant polyurethane dispersion is smoothly discharged from the bottom of the emulsification chamber 115 through the output valve 118 under the action of gravity or slight system pressure, and enters the subsequent storage tank or application stage.

[0054] Because the bending rod 113 completely eliminates the bottom dead corner, there is no residual material accumulation at the bottom of the cavity, the discharge is complete and thorough, and the material utilization rate is high.

[0055] S6. After discharge, an appropriate amount of cleaning solvent can be introduced, and the drive motor 103 can be started briefly. The high-speed rotating rotor 116, the bending rod 113, and the internal circulation will efficiently clean the emulsification chamber 115. The continuous scraping of the bottom by the bending rod 113 ensures that there are no dead corners in the cleaning. The cleaning liquid is also discharged from the output valve 118.

[0056] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wastewater-resistant polyurethane dispersion emulsifier, comprising an emulsifier body (101), characterized in that: The emulsifying body (101) is fixedly provided with several body support legs (102) at its bottom. The body support legs (102) are arranged in a circular array and provide stable support. The emulsifying body (101) is provided with an emulsifying chamber (115). A rotor (116) is rotatably provided in the emulsifying chamber (115). An input shaft (114) is rotatably provided at the bottom of the emulsifying chamber (115). The input shaft (114) is fixedly connected to the bottom of the rotor (116). A drive motor (103) is installed at the bottom of the emulsifying body (101). The bottom of the input shaft (114) is poweredly connected to the drive motor (103). A rotating top plate (111) is fixedly provided on the outer end face of the top of the rotor (116). Several bent rods (113) are fixedly provided at the bottom of the rotating top plate (111). The bent rods (113) are arranged in a circular array.

2. The wastewater-resistant polyurethane dispersion and emulsifier according to claim 1, characterized in that: The rotor (116) is provided with a number of through holes (112) that are connected vertically, and the through holes (112) are arranged in a ring array.

3. The wastewater-resistant polyurethane dispersion and emulsifier according to claim 1, characterized in that: The rotor (116) is fitted with a connecting sleeve cover (110) at its top end, and the connecting sleeve cover (110) has a sealed cavity (109) inside.

4. The wastewater-resistant polyurethane dispersion and emulsifier according to claim 3, characterized in that: The emulsifying body (101) is provided with a top sealing plate (107) at the center of the top, and a connecting pipe (106) is provided at the top of the top sealing plate (107). The bottom of the connecting pipe (106) extends into the connecting sleeve (110).

5. The wastewater-resistant polyurethane dispersion and emulsifier according to claim 4, characterized in that: The connecting pipe (106) is connected to an input pipe (105). The bottom of the input pipe (105) is provided with a number of input holes (108) with outward openings. The input holes (108) are arranged in a ring array.

6. The wastewater-resistant polyurethane dispersion and emulsifier according to claim 5, characterized in that: The top end of the input pipe (105) extends outward and is connected to a material input port (104).

7. The wastewater-resistant polyurethane dispersion and emulsifier according to claim 1, characterized in that: An output valve (118) is installed on one side of the bottom of the emulsifying body (101), and the output valve (118) is connected to the bottom of the emulsifying chamber (115).

Images