Emulsion reaction kettle for producing waterborne polyurethane dispersoid

Abstract

The utility model discloses an emulsification reaction kettle for producing waterborne polyurethane dispersoid, which relates to the technical field of polyurethane dispersoid synthesis equipment and comprises a kettle body, a heating jacket is mounted on the outer surface of the kettle body, a kettle cover is fixedly mounted at the top of the kettle body, a stirring and scraping component is mounted at the upper end of the kettle cover, and a stirring and scraping component is mounted at the lower end of the kettle cover. The kettle body is heated through the heating jacket, the first motor is started to drive the mounting ring to rotate, then the mounting ring drives the stirring rod to stir and emulsify the dispersion in the kettle body, and when acetone in the dispersion is heated and vaporized, due to upward movement of hot air, the vaporized acetone can be adhered to the adhesion plate, so that the acetone in the dispersion can be emulsified. Meanwhile, when a first motor drives a stirring rod to stir, a fixed ring is driven to rotate, then the fixed ring drives a scraper to rotate, and the scraper scrapes acetone adhered to an adhesion plate, so that the acetone enters the dispersion again, the emulsification quality is improved, and the situation that the acetone cannot be fully liquefied, and the emulsification procedure is affected is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of polyurethane dispersion synthesis equipment, in particular to an emulsification reaction kettle for producing waterborne polyurethane dispersion. Background Art

[0002] A reactor is broadly understood as a container for physical or chemical reactions. The heating, evaporation, cooling and low-speed mixing functions required by the process are achieved through the structural design and parameter configuration of the container. During the production process of water-based dispersions, the dispersion production quality needs to be improved by mixing and proportioning in the reactor. When producing water-based polyurethane dispersions, a prepolymer containing terminal NCO groups is first prepared; then a small molecule diol chain extender containing a hydrophilic group is added to extend the chain, and a certain amount of acetone is added for dilution; then a neutralizing agent is added for neutralization, and water is added for dispersion and emulsification under high-speed dispersion. After emulsification is completed, the solvent is removed to finally obtain a water-based polyurethane dispersion.

[0003] Chinese patent CN219744828U discloses an aqueous polyurethane emulsion reactor, comprising: a reactor body, a reactor cover, a discharge port, a feed port, a heating jacket, a stirrer, a first stirring body, a second stirring body and a third stirring body; the first stirring body is a frame stirring structure, the second stirring body is an axis stirring structure, the third stirring body is movably arranged between two upper and lower adjacent stirring paddles of the second stirring body, and the stirring paddle of the first stirring body is attached to the side of the stirring paddle of the third stirring body, so that it can be suitable for the reaction production of aqueous polyurethane emulsion, ensuring that the aqueous polyurethane dispersion is fully stirred and reacted in the reactor, and avoiding gelation during the production process.

[0004] When the device heats the kettle body through the heating jacket, when the temperature exceeds the boiling point of acetone in the aqueous polyurethane dispersion, the acetone vaporizes and rises with the hot air to separate from the aqueous polyurethane dispersion raw material. Due to the rise of the hot air, the temperature of the upper part of the closed kettle body is always relatively high, and the acetone cannot be fully liquefied, resulting in a continuous increase in material viscosity and low material fluidity, which affects the emulsification process. Utility Model Content

[0005] Based on this, it is necessary to provide an emulsification reactor for the production of water-based polyurethane dispersions in response to the existing technical problems. The acetone on the top wall inside the reactor can be scraped off by a rotating scraper, thereby solving the technical problem that the acetone on the top wall inside the reactor cannot be fully liquefied.

[0006] In order to solve the problems of the prior art, the utility model provides an emulsification reaction kettle for producing waterborne polyurethane dispersion, comprising a kettle body, a heating jacket is installed on the outer surface of the kettle body, a kettle cover is fixedly installed on the top of the kettle body, a stirring and scraping assembly is installed on the upper end of the kettle cover, a filtering and collecting assembly is installed on the upper end of the kettle cover located on one side of the stirring and scraping assembly, a discharge port is installed at the center of the lower end of the kettle body, and a discharge valve is installed at the lower end of the discharge port;

[0007] The stirring and scraping assembly includes a first motor fixedly installed on the upper end of the kettle cover, a first rotating rod is fixedly installed on the lower end of the first motor passing through the kettle cover, a fixing ring is fixedly installed on the outer surface of the first rotating rod, a scraper is fixedly installed on one side of the fixing ring, a mounting ring is fixedly installed on the outer surface of the first rotating rod below the fixing ring, stirring rods are fixedly installed on both sides of the mounting ring, an adhesive plate is fixedly installed on the bottom of the kettle cover, and an insulating block is installed at the contact position between the adhesive plate and the bottom of the kettle cover.

[0008] Preferably, the inner surface of the kettle body is rotatably connected with a rotating ring, a gear ring is fixedly installed on the upper end of the rotating ring, a bevel gear is meshingly connected to the upper end of the gear ring, a second rotating rod is fixedly installed on one side of the bevel gear, one side of the second rotating rod extends to the outside of the kettle body and a rotating disk is fixedly installed, a fixed block is fixedly installed on the inner side of the rotating ring, a connecting rod is fixedly installed under the fixed block, a fixed seat is fixedly installed on the outer surface of the connecting rod, and a scraper is fixedly installed on one side of the fixed seat.

[0009] Preferably, two groups of connecting pipes are installed on a side of the upper surface of the kettle cover away from the processing box, and the two groups of connecting pipes are both connected to the adhesive plate.

[0010] Preferably, the filtering and collecting assembly includes a processing box fixedly mounted on the upper end of the kettle cover and located on one side of the first motor, a feed port is fixedly mounted on the top of the processing box, a fixed frame is embedded in the outer surface of one side of the processing box, a sliding rod is fixedly mounted on the inner surface of the fixed frame, a movable plate is slidably connected to the outer surface of the sliding rod, a spring is fixedly mounted on the lower surface of the movable plate, one end of the movable plate extends to the outside of the fixed frame, the other end of the movable plate extends to the processing box where a filter plate is fixedly mounted, the other side of the filter plate is rotatably connected to the inside of the processing box, and a collecting box is fixedly mounted on one side of the processing box.

[0011] Preferably, a second motor is fixedly mounted on the upper end of the kettle cover located on the other side of the processing box, a turntable is fixedly mounted on the output end of the second motor, and a fixing column is fixedly mounted on the outer surface of the turntable.

[0012] Preferably, one end of the spring is fixedly connected to the lower surface of the movable plate, the other end of the spring is fixedly connected to the inner wall of the fixed frame, and the spring is sleeved on the outer surface of the sliding rod.

[0013] Preferably, support feet are fixedly installed on the lower end of the kettle body at both sides of the discharge port, and the outer surfaces of the support feet are bonded with rubber material.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. The present invention can scrape off the acetone on the top wall of the kettle body by a rotating scraper, thereby solving the technical problem that the acetone on the top wall of the kettle body cannot be fully liquefied;

[0016] 2. This application uses a scraper that rotates along the inner wall of the kettle to clean the inner wall of the kettle to prevent adhesion;

[0017] 3. The present application filters impurities in the dispersion by means of a shaking filter plate in the treatment box, thereby improving the purity of the emulsification. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a stereoscopic view of an emulsifying reactor for producing waterborne polyurethane dispersion in the first perspective;

[0019] Figure 2 It is a cross-sectional view of an emulsifying reactor for producing waterborne polyurethane dispersions from a frontal perspective;

[0020] Figure 3 It is an emulsification reactor for the production of waterborne polyurethane dispersions. Figure 2 Enlarged view of point A in the middle;

[0021] Figure 4 It is a stereoscopic diagram of a first rotating rod, a fixed ring, a scraper and a stirring rod in an emulsifying reaction kettle for producing waterborne polyurethane dispersion;

[0022] Figure 5 It is a stereoscopic diagram of a rotating ring, a gear ring, a fixed seat and a scraper in an emulsification reaction kettle for producing waterborne polyurethane dispersion;

[0023] Figure 6 It is a stereoscopic view of a kettle cover in an emulsification reactor for producing waterborne polyurethane dispersion;

[0024] Figure 7 The present invention is a cross-sectional view of a treatment box in an emulsification reactor for producing waterborne polyurethane dispersions, viewed from a side perspective.

[0025] The numbers in the figure are: 1, kettle body; 2, heating jacket; 3, supporting foot; 4, kettle cover; 5, discharge port; 6, discharge valve; 7, stirring and scraping assembly; 71, first motor; 711, first rotating rod; 712, fixing ring; 713, scraper; 714, mounting ring; 715, stirring rod; 72, adhesion plate; 721, insulation block; 73, rotating ring; 731, gear ring; 732, bevel gear; 733, second rotating rod; 734, rotating disk; 735, fixing block; 736, connecting rod; 737, fixing seat; 738, scraper; 8, filtering and collecting assembly; 81, second motor; 82, turntable; 83, fixing column; 84, processing box; 85, feed port; 86, fixing frame; 87, moving plate; 88, sliding rod; 89, spring; 810, filter plate; 811, collecting box. DETAILED DESCRIPTION

[0026] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0027] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the utility model provides: an emulsification reaction kettle for producing waterborne polyurethane dispersion, comprising a kettle body 1, a heating jacket 2 is installed on the outer surface of the kettle body 1, a kettle cover 4 is fixedly installed on the top of the kettle body 1, a stirring and scraping assembly 7 is installed on the upper end of the kettle cover 4, a filtering and collecting assembly 8 is installed on the upper end of the kettle cover 4 located on one side of the stirring and scraping assembly 7, a discharge port 5 is installed at the center of the lower end of the kettle body 1, and a discharge valve 6 is installed at the lower end of the discharge port 5; the stirring and scraping assembly 7 includes a first motor 71 fixedly installed on the upper end of the kettle cover 4, and the lower end of the first motor 71 passes through the kettle cover 4 and is fixedly installed with a A first rotating rod 711, a fixing ring 712 is fixedly installed on the outer surface of the first rotating rod 711, a scraper 713 is fixedly installed on one side of the fixing ring 712, a mounting ring 714 is fixedly installed on the outer surface of the first rotating rod 711 below the fixing ring 712, stirring rods 715 are fixedly installed on both sides of the mounting ring 714, an adhesive plate 72 is fixedly installed on the bottom of the kettle cover 4, an insulating block 721 is installed at the contact position between the adhesive plate 72 and the bottom of the kettle cover 4, two groups of connecting pipes are installed on the side of the upper surface of the kettle cover 4 away from the processing box 84, and the two groups of connecting pipes are connected to the adhesive plate 72.

[0028] When in use, the kettle body 1 is heated by the heating jacket 2, and the first motor 71 is started to drive the mounting ring 714 to rotate, and the mounting ring 714 drives the stirring rod 715 to stir and emulsify the dispersion in the kettle body 1. When the acetone in the dispersion is heated and vaporized, the vaporized acetone will adhere to the adhesion plate 72 due to the upward movement of the hot air. Then, by connecting the connecting pipe on one side of the kettle cover 4 to the water inlet of the water source and the connecting pipe on the other side to the water outlet of the water source, the temperature of the outer surface of the adhesion plate 72 is reduced by the action of the water pump, so that the vaporized acetone is liquefied when it contacts the adhesion plate 72. At the same time, when the stirring rod 715 is driven by the first motor 71 to stir, the fixing ring 712 is driven to rotate, and the fixing ring 712 drives the scraper 713 to rotate, and the scraper 713 scrapes off the acetone adhered to the adhesion plate 72, so that the acetone re-enters the dispersion, thereby improving the emulsification quality and preventing the acetone from being unable to be fully liquefied, which affects the emulsification process.

[0029] like Figure 2 , Figure 5 As shown, the inner surface of the kettle body 1 is rotatably connected with a rotating ring 73, the upper end of the rotating ring 73 is fixedly installed with a gear ring 731, the upper end of the gear ring 731 is meshingly connected with a bevel gear 732, a second rotating rod 733 is fixedly installed on one side of the bevel gear 732, one side of the second rotating rod 733 extends to the outside of the kettle body 1 and is fixedly installed with a rotating disk 734, a fixed block 735 is fixedly installed on the inner side of the rotating ring 73, a connecting rod 736 is fixedly installed below the fixed block 735, a fixed seat 737 is fixedly installed on the outer surface of the connecting rod 736, and a scraper 738 is fixedly installed on one side of the fixed seat 737.

[0030] When the emulsified dispersion is discharged, the rotating disk 734 is rotated to drive the second rotating rod 733 to rotate, and the second rotating rod 733 drives the bevel gear 732 to rotate, and the bevel gear 732 is meshed with the ring gear 731 to drive the rotating ring 73 to rotate in the kettle body 1, and the rotating ring 73 drives the scraper 738 to rotate along the inner wall of the kettle body 1 through the connecting rod 736 and the fixed seat 737 below, so as to clean the inner wall of the kettle body 1 and prevent adhesion.

[0031] like Figure 6 , Figure 7As shown, the filtering and collecting assembly 8 includes a processing box 84 fixedly mounted on the upper end of the kettle cover 4 and located on one side of the first motor 71, a feed port 85 is fixedly mounted on the top of the processing box 84, a fixed frame 86 is embedded in the outer surface of one side of the processing box 84, a slide bar 88 is fixedly mounted on the inner surface of the fixed frame 86, a movable plate 87 is slidably connected to the outer surface of the slide bar 88, a spring 89 is fixedly mounted on the lower surface of the movable plate 87, one end of the movable plate 87 extends to the outside of the fixed frame 86, and the other end of the movable plate 87 extends to the processing box 84 and a filter plate 810 is fixedly mounted therein, the other side of the filter plate 810 is rotatably connected to the inside of the processing box 84, a collecting box 811 is fixedly mounted on one side of the processing box 84, a second motor 81 is fixedly mounted on the upper end of the kettle cover 4 and located on the other side of the processing box 84, a turntable 82 is fixedly mounted on the output end of the second motor 81, and a fixed column 83 is fixedly mounted on the outer surface of the turntable 82.

[0032] When the dispersion enters from the feed port 85, the second motor 81 is started, the second motor 81 drives the turntable 82 to rotate, and the turntable 82 drives the fixed column 83 to rotate. When the fixed column 83 rotates, it contacts the movable plate 87, drives the movable plate 87 to slide along the slide rod 88, and stretches the spring 89, so that the filter plate 810 is driven to shake through the movable plate 87, so that impurities in the dispersion are filtered, and the filtered impurities will fall into the collection box 811 along the filter plate 810, thereby preventing the dispersion from mixing with impurities and improving the purity of the emulsification.

[0033] like Figure 7 As shown, one end of the spring 89 is fixedly connected to the lower surface of the moving plate 87, and the other end of the spring 89 is fixedly connected to the inner wall of the fixed frame 86, and the spring 89 is sleeved on the outer surface of the slide bar 88. Through the elastic deformation of the spring 89, when the fixed column 83 rotates and contacts the moving plate 87, the spring 89 is compressed, and when the fixed column 83 does not contact the moving plate 87, the spring 89 is stretched, thereby achieving a shaking effect.

[0034] like Figure 2 As shown, the lower end of the kettle body 1 is fixedly mounted with support feet 3 on both sides of the discharge port 5, and the outer surface of the support feet 3 is bonded with rubber material. The rubber material on the lower surface of the support feet 3 increases the friction force to prevent shaking during operation, and the buffering performance of the rubber material buffers the kettle body 1 to reduce the vibration generated in the studio.

[0035] The above embodiments only express one or several implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. 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 present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the attached claims.

Claims

1. An emulsification reactor for producing waterborne polyurethane dispersion, comprising a reactor body (1), characterized in that: A heating jacket (2) is installed on the outer surface of the kettle body (1); a kettle cover (4) is fixedly installed on the top of the kettle body (1); a stirring and scraping assembly (7) is installed on the upper end of the kettle cover (4); a filtering and collecting assembly (8) is installed on the upper end of the kettle cover (4) located on one side of the stirring and scraping assembly (7); a discharge port (5) is installed at the center of the lower end of the kettle body (1); and a discharge valve (6) is installed at the lower end of the discharge port (5); The stirring and scraping assembly (7) comprises a scraper (713) that can rotate along the center of the top wall inside the kettle body (1).

2. The emulsifying reactor for producing an aqueous polyurethane dispersion according to claim 1, characterized in that: A first motor (71) is fixedly mounted at the center position of the upper end of the kettle cover (4); a first rotating rod (711) is fixedly mounted at the lower end of the first motor (71) passing through the kettle cover (4); a fixing ring (712) is fixedly mounted on the outer surface of the first rotating rod (711); a scraper (713) is fixedly mounted on one side of the fixing ring (712); a mounting ring (714) is fixedly mounted on the outer surface of the first rotating rod (711) below the fixing ring (712); stirring rods (715) are fixedly mounted on both sides of the mounting ring (714); an adhesive plate (72) is fixedly mounted on the bottom of the kettle cover (4); and a heat insulating block (721) is mounted at a contact position between the adhesive plate (72) and the bottom of the kettle cover (4).

3. The emulsifying reactor for producing an aqueous polyurethane dispersion according to claim 1, characterized in that: A rotating ring (73) is rotatably connected to the inner surface of the kettle body (1), a gear ring (731) is fixedly mounted on the upper end of the rotating ring (73), a bevel gear (732) is meshedly connected to the upper end of the gear ring (731), a second rotating rod (733) is fixedly mounted on one side of the bevel gear (732), one side of the second rotating rod (733) extends to the outer side of the kettle body (1) and is fixedly mounted with a rotating disk (734), a fixed block (735) is fixedly mounted on the inner side of the rotating ring (73), a connecting rod (736) is fixedly mounted below the fixing block (735), a fixing seat (737) is fixedly mounted on the outer surface of the connecting rod (736), and a scraper (738) is fixedly mounted on one side of the fixing seat (737).

4. The emulsification reactor for producing an aqueous polyurethane dispersion according to claim 1, characterized in that: Two groups of connecting pipes are installed on the side of the upper surface of the kettle cover (4) away from the processing box (84), and the two groups of connecting pipes are both connected to the adhesive plate (72).

5. The emulsifying reactor for producing waterborne polyurethane dispersion according to claim 1, characterized in that: The filtering and collecting assembly (8) comprises a processing box (84) fixedly mounted on the upper end of the kettle cover (4) and located on one side of the first motor (71); a feed port (85) is fixedly mounted on the top of the processing box (84); a fixing frame (86) is embedded in the outer surface of one side of the processing box (84); a sliding rod (88) is fixedly mounted on the inner surface of the fixing frame (86); a moving plate (87) is slidably connected to the outer surface of the sliding rod (88); a spring (89) is fixedly mounted on the lower surface of the moving plate (87); one end of the moving plate (87) extends to the outside of the fixing frame (86); the other end of the moving plate (87) extends to the inside of the processing box (84) where a filter plate (810) is fixedly mounted; the other side of the filter plate (810) is rotatably connected to the inside of the processing box (84); and a collecting box (811) is fixedly mounted on one side of the processing box (84).

6. The emulsification reactor for producing waterborne polyurethane dispersion according to claim 1, characterized in that: A second motor (81) is fixedly mounted on the upper end of the kettle cover (4) located on the other side of the processing box (84), a rotating disk (82) is fixedly mounted on the output end of the second motor (81), and a fixing column (83) is fixedly mounted on the outer surface of the rotating disk (82).

7. The emulsification reactor for producing waterborne polyurethane dispersion according to claim 5, characterized in that: One end of the spring (89) is fixedly connected to the lower surface of the movable plate (87), the other end of the spring (89) is fixedly connected to the inner wall of the fixed frame (86), and the spring (89) is sleeved on the outer surface of the sliding rod (88).

8. The emulsification reactor for producing waterborne polyurethane dispersion according to claim 1, characterized in that: The lower end of the kettle body (1) is fixedly provided with support legs (3) on both sides of the discharge port (5), and the outer surfaces of the support legs (3) are bonded with rubber material.

Images