Waterborne polyurethane continuous film evaporation dehydration equipment

Abstract

The utility model relates to the technical field of film evaporation dehydration, and discloses waterborne polyurethane continuous film evaporation dehydration equipment which comprises a heat preservation mechanism, the heat preservation mechanism is arranged in an evaporation tank, the heat preservation mechanism comprises a collection box arranged below the evaporation tank, and the heat preservation mechanism is used for preserving heat when evaporation is needed. The heat absorbed by the evaporation tank is uniform, and the evaporation quality is improved; and the scraping mechanism is arranged in the evaporation tank. As steam entering the evaporation box is more and more, the air pressure in the evaporation box is continuously increased, the T-shaped mounting block is pushed by the air to rise, at the moment, the limiting spring is stretched, and after the rectangular groove in the T-shaped mounting block leaves the evaporation box, the steam in the evaporation box is discharged, so that not only can the pressure be released, but also the air pressure in the evaporation box is reduced. The stable air pressure in the evaporation tank can be ensured, so that the steam can uniformly conduct heat on the inner wall of the evaporation tank, and the waterborne polyurethane can be uniformly heated and evaporated.

Description

Waterborne polyurethane continuous thin film evaporation dehydration equipment Technical Field

[0001] This utility model relates to the field of thin film evaporation and dehydration technology, specifically to a water-based polyurethane continuous thin film evaporation and dehydration device. Background Technology

[0002] The continuous thin-film evaporation dehydration equipment for waterborne polyurethane (WPU) is a highly efficient dehydration and concentration device specifically designed for the production of waterborne polyurethane (WPU). Its core principle is to achieve rapid solvent removal and material concentration through forced film formation by a rotating scraper and low-temperature vacuum evaporation. This equipment is widely used in chemical, coating, and adhesive industries, and is particularly suitable for the industrial production of heat-sensitive waterborne polyurethane.

[0003] In existing thin-film evaporation equipment, when steam conducts heat through the outer wall, the lack of a dynamic pressure regulation mechanism can easily lead to pressure accumulation inside the evaporation chamber. Uneven pressure can cause unstable heat transfer, and uneven steam distribution can cause uneven heating of the inner wall, resulting in local overheating or incomplete evaporation of the waterborne polyurethane liquid film. Summary of the Invention

[0004] The purpose of this invention is to provide a waterborne polyurethane continuous thin-film evaporation and dehydration device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a water-based polyurethane continuous thin-film evaporation and dehydration device, including a heat preservation mechanism, which is installed inside the evaporation tank. The heat preservation mechanism includes a collection box installed below the evaporation tank. The heat preservation mechanism is used to preserve the heat required for evaporation, ensuring that the heat absorbed by the evaporation tank is uniform and improving the quality of evaporation.

[0006] A scraping mechanism is provided inside the evaporator. The scraping mechanism includes a conical circular plate disposed inside the evaporator. The scraping mechanism is used to uniformly flow the water-based polyurethane to be evaporated along the inner wall of the evaporator, so that the water-based polyurethane can be evaporated evenly and fully.

[0007] Preferably, the heat preservation mechanism includes a collection box fixedly installed at the bottom of the evaporator, the evaporator is connected to the collection box, an evaporation box is fixedly installed on the outer wall of the evaporator, and an air inlet pipe is fixedly installed on the outer wall of the evaporation box.

[0008] Preferably, the heat preservation mechanism further includes an annular plate fixedly installed on the inner wall of the evaporator, the inner side of which does not contact the outer wall of the evaporator.

[0009] Preferably, a plurality of limiting springs are fixedly installed on the top of the annular plate, and a T-shaped mounting block is fixedly installed on the top of the plurality of limiting springs.

[0010] Preferably, the top ends of the plurality of T-shaped mounting blocks all slide to the outside of the evaporator, and rectangular grooves are respectively formed on the outer walls of the plurality of T-shaped mounting blocks.

[0011] Preferably, the scraping mechanism includes a conical plate rotatably mounted on the inner wall of the top of the evaporator, the conical plate having a plurality of liquid outlet grooves, and an inlet pipe fixedly mounted on the top of the evaporator, the inlet pipe communicating with the plurality of liquid outlet grooves.

[0012] Preferably, a transmission rod is fixedly installed at the bottom of the liquid outlet tank, the bottom end of the transmission rod rotatably passes through the collection box, and a plurality of scrapers are fixedly installed on the outer wall of the transmission rod, all of which are inclined.

[0013] Preferably, a drive motor is fixedly installed on the bottom inner wall of the collection box, the output shaft of the drive motor is fixedly connected to the bottom end of the transmission rod, and an exhaust pipe is fixedly installed on the top of the evaporator.

[0014] Compared with the prior art, the beneficial effects of this utility model are: this water-based polyurethane continuous thin-film evaporation dehydration equipment,

[0015] 1. Steam is introduced into the evaporator through the inlet pipe. The steam entering the evaporator will come into contact with the outer wall of the evaporator. The steam will transfer heat to the inner wall of the evaporator through the outer wall, evaporating the water-based polyurethane on the inner wall of the evaporator. As more and more steam enters the evaporator, the gas pressure inside the evaporator will continue to increase. The gas will push the T-shaped mounting block to rise. At this time, the limiting spring will undergo tensile deformation. When the rectangular groove on the T-shaped mounting block leaves the evaporator, the steam inside the evaporator will be discharged. This not only relieves pressure but also ensures that the gas pressure inside the evaporator is stable, so that the steam can conduct heat evenly to the inner wall of the evaporator, allowing the water-based polyurethane to be heated and evaporated evenly.

[0016] 2. During the evaporation of waterborne polyurethane, the waterborne polyurethane is introduced into the conical plate through the inlet pipe. The waterborne polyurethane will be discharged from several outlet channels. The drive motor is started, which drives the transmission rod to rotate. The transmission rod drives the conical plate to rotate. When the waterborne polyurethane is discharged from the outlet channels, it is thrown onto the inner wall of the evaporator by the centrifugal force of the rotating conical plate. The transmission rod drives several scrapers to rotate. The scrapers, under the action of their inclined surfaces, throw the waterborne polyurethane that falls onto them, so that the waterborne polyurethane always sticks to the inner wall of the evaporator. In addition, the scraping action of the scrapers makes the waterborne polyurethane evenly adhere to the inner wall of the evaporator, thereby ensuring that the waterborne polyurethane can evaporate quickly and improving the evaporation efficiency. Attached Figure Description

[0017] Figure 1 is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 is a side sectional view of the present invention;

[0019] Figure 3 is a partial cross-sectional structural schematic diagram of this utility model;

[0020] Figure 4 is an enlarged structural schematic diagram of A in Figure 3 of this utility model;

[0021] Figure 5 is an enlarged structural schematic diagram of B in Figure 2 of this utility model.

[0022] In the diagram: 1. Evaporator; 101. Collection box; 102. Evaporator; 103. Inlet pipe; 104. Annular plate; 105. Limiting spring; 106. T-shaped mounting block; 107. Rectangular groove; 2. Conical plate; 201. Liquid outlet groove; 202. Liquid inlet pipe; 203. Transmission rod; 204. Scraper; 205. Drive motor; 206. Exhaust pipe. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please refer to Figures 1-5. This utility model provides a technical solution: a continuous thin-film evaporation and dehydration device for water-based polyurethane, including a heat preservation mechanism disposed inside an evaporation tank 1. The heat preservation mechanism includes a collection box 101 disposed below the evaporation tank 1. The heat preservation mechanism is used to preserve the heat required for evaporation, ensuring that the heat absorbed by the evaporation tank 1 is uniform and improving the quality of evaporation. A scraping mechanism is also provided inside the evaporation tank 1. The scraping mechanism includes a conical circular plate 2 disposed inside the evaporation tank 1. The scraping mechanism is used to uniformly flow the water-based polyurethane to be evaporated along the inner wall of the evaporation tank 1, thereby enabling the water-based polyurethane to evaporate evenly and fully. The heat preservation mechanism includes a collection box 101 fixedly installed at the bottom of the evaporation tank 1, and the evaporation tank 1 communicates with the collection box 101. An evaporation chamber 102 is fixedly installed on the outer wall of the evaporation tank 1, and an air inlet pipe 103 is fixedly installed on the outer wall of the evaporation chamber 102. The heat preservation mechanism also includes an annular plate 104 fixedly installed on the inner wall of the evaporation chamber 102, the inner side of which does not contact the outer wall of the evaporation tank 1. A number of limiting springs 105 are fixedly installed on the top of the annular plate 104, and T-shaped mounting blocks 106 are fixedly installed on the top of the limiting springs 105. The top ends of the T-shaped mounting blocks 106 all slide to the outside of the evaporator 1, and rectangular grooves 107 are respectively opened on the outer wall of the T-shaped mounting blocks 106.

[0025] Steam is introduced into the evaporator 102 through the inlet pipe 103. The steam entering the evaporator 102 comes into contact with the outer wall of the evaporator 1 and transfers heat to the inner wall of the evaporator 1, evaporating the water-based polyurethane on the inner wall of the evaporator 1. As more and more steam enters the evaporator 102, the air pressure inside the evaporator 102 will continuously increase, and the gas will push the T-shaped mounting block 106 to rise. At this time, the limiting spring 105 will undergo tensile deformation. When the rectangular groove 107 on the T-shaped mounting block 106 leaves the evaporator 102, the steam inside the evaporator 102 will be discharged. This not only relieves pressure but also ensures that the air pressure inside the evaporator 102 is stable, so that the steam can conduct heat evenly to the inner wall of the evaporator 1, allowing the water-based polyurethane to be heated and evaporated evenly.

[0026] The scraping mechanism includes a conical plate 2 rotatably mounted on the inner wall of the top of the evaporator 1. Several liquid outlet grooves 201 are formed on the conical plate 2. An inlet pipe 202 is fixedly installed on the top of the evaporator 1, communicating with the liquid outlet grooves 201. A transmission rod 203 is fixedly installed at the bottom of the liquid outlet grooves 201, with its bottom end rotatably penetrating through a collection box 101. Several scrapers 204 are fixedly installed on the outer wall of the transmission rod 203, all arranged at an angle. A drive motor 205 is fixedly installed on the inner wall of the bottom of the collection box 101, with its output shaft fixedly connected to the bottom end of the transmission rod 203. An exhaust pipe 206 is fixedly installed on the top of the evaporator 1.

[0027] When evaporating waterborne polyurethane, the waterborne polyurethane is fed into the conical plate 2 through the inlet pipe 202. The waterborne polyurethane will be discharged from several outlet tanks 201. The drive motor 205 is started, which drives the transmission rod 203 to rotate. The transmission rod 203 drives the conical plate 2 to rotate. When the waterborne polyurethane is discharged from the outlet tanks 201, it will be thrown onto the inner wall of the evaporator 1 by the centrifugal force of the rotation of the conical plate 2. The transmission rod 203 will drive several scrapers 204 to rotate. The scrapers 204 will be thrown by the waterborne polyurethane falling on them under the action of their inclined surfaces, so that the waterborne polyurethane will always stick to the inner wall of the evaporator 1. In addition, the scraping of the scrapers 204 will make the waterborne polyurethane evenly adhere to the inner wall of the evaporator 1, thereby ensuring that the waterborne polyurethane can evaporate quickly and improving the evaporation efficiency of the waterborne polyurethane.

[0028] When using the waterborne polyurethane continuous thin-film evaporation and dehydration equipment, steam is input into the evaporation chamber 102 through the air inlet pipe 103. The steam entering the evaporation chamber 102 will contact the outer wall of the evaporation tank 1. The steam will transfer heat to the inner wall of the evaporation tank 1 through the outer wall of the evaporation tank 1, evaporating the waterborne polyurethane on the inner wall of the evaporation tank 1. As more and more steam enters the evaporation chamber 102, the air pressure in the evaporation chamber 102 will continuously increase. The gas will push the T-shaped mounting block 106 to rise. At this time, the limiting spring 105 will undergo tensile deformation. When the rectangular groove 107 on the T-shaped mounting block 106 leaves the evaporation chamber 102, the steam in the evaporation chamber 102 will be discharged. This not only relieves pressure but also ensures that the air pressure in the evaporation chamber 102 is stable, so that the steam can conduct heat evenly to the inner wall of the evaporation tank 1, allowing the waterborne polyurethane to be heated and evaporated evenly.

[0029] When evaporating waterborne polyurethane, the waterborne polyurethane is fed into the conical plate 2 through the inlet pipe 202. The waterborne polyurethane will be discharged from several outlet tanks 201. The drive motor 205 is started, which drives the transmission rod 203 to rotate. The transmission rod 203 drives the conical plate 2 to rotate. When the waterborne polyurethane is discharged from the outlet tanks 201, it will be thrown onto the inner wall of the evaporator 1 by the centrifugal force of the rotation of the conical plate 2. The transmission rod 203 will drive several scrapers 204 to rotate. The scrapers 204 will be thrown by the waterborne polyurethane falling on them under the action of their inclined surfaces, so that the waterborne polyurethane will always stick to the inner wall of the evaporator 1. In addition, the scraping of the scrapers 204 will make the waterborne polyurethane evenly adhere to the inner wall of the evaporator 1, thereby ensuring that the waterborne polyurethane can evaporate quickly and improving the evaporation efficiency of the waterborne polyurethane.

[0030] 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 waterborne polyurethane continuous thin-film evaporation and dehydration equipment, characterized in that, Also includes: The heat preservation mechanism is installed inside the evaporator (1). The heat preservation mechanism includes a collection box (101) installed below the evaporator (1). The heat preservation mechanism is used to keep the heat that needs to be evaporated, so as to ensure that the heat absorbed by the evaporator (1) is uniform and improve the quality of evaporation. The scraping mechanism is installed inside the evaporator (1). The scraping mechanism includes a conical circular plate (2) installed inside the evaporator (1). The scraping mechanism is used to make the water-based polyurethane that needs to be evaporated flow evenly along the inner wall of the evaporator (1), so that the water-based polyurethane can evaporate evenly and fully.

2. The waterborne polyurethane continuous thin-film evaporation and dehydration equipment according to claim 1, characterized in that: The heat preservation mechanism includes a collection box (101) fixedly installed at the bottom of the evaporator (1), the evaporator (1) is connected to the collection box (101), an evaporator (102) is fixedly installed on the outer wall of the evaporator (1), and an air inlet pipe (103) is fixedly installed on the outer wall of the evaporator (102).

3. The waterborne polyurethane continuous thin-film evaporation and dehydration equipment according to claim 2, characterized in that: The heat preservation mechanism also includes an annular plate (104) fixedly installed on the inner wall of the evaporator (102), and the inner side of the annular plate (104) does not contact the outer wall of the evaporator (1).

4. The waterborne polyurethane continuous thin-film evaporation and dehydration equipment according to claim 3, characterized in that: A plurality of limiting springs (105) are fixedly installed on the top of the annular plate (104), and a T-shaped mounting block (106) is fixedly installed on the top of the plurality of limiting springs (105).

5. The waterborne polyurethane continuous thin-film evaporation and dehydration equipment according to claim 4, characterized in that: The top ends of several T-shaped mounting blocks (106) slide to the outside of the evaporator (1), and rectangular grooves (107) are respectively opened on the outer walls of several T-shaped mounting blocks (106).

6. The waterborne polyurethane continuous thin-film evaporation and dehydration equipment according to claim 1, characterized in that: The scraping mechanism includes a conical plate (2) rotatably mounted on the inner wall of the top of the evaporator (1). The conical plate (2) has several liquid outlet grooves (201). An inlet pipe (202) is fixedly installed on the top of the evaporator (1). The inlet pipe (202) is connected to the several liquid outlet grooves (201).

7. The waterborne polyurethane continuous thin-film evaporation and dehydration equipment according to claim 6, characterized in that: A transmission rod (203) is fixedly installed at the bottom of the liquid outlet tank (201). The bottom end of the transmission rod (203) rotates through the collection box (101). Several scrapers (204) are fixedly installed on the outer wall of the transmission rod (203). All of the scrapers (204) are inclined.

8. The waterborne polyurethane continuous thin-film evaporation and dehydration equipment according to claim 7, characterized in that: A drive motor (205) is fixedly installed on the bottom inner wall of the collection box (101). The output shaft of the drive motor (205) is fixedly connected to the bottom end of the transmission rod (203). An exhaust pipe (206) is fixedly installed on the top of the evaporator (1).

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