A device for separating free Tdi monomers from curing agents

Abstract

This utility model discloses a device for separating free TDI monomers from curing agents, relating to the field of free TDI separation technology. The utility model includes a heating tank and a condensing tank fixed to the top of a frame, and a first recovery tank and a second recovery tank fixed to the bottom of the frame. A first discharge pipe is fixedly connected between the heating tank and the first recovery tank. A heat exchange cylinder is fixedly connected between the tops of the heating tank and the condensing tank. A feed pipe is fixedly connected to the top of the heat exchange cylinder. A connecting pipe is fixedly connected between the bottom of the heat exchange cylinder and the heating tank. An intermediate pipe is fixedly connected between the top of the heating tank and the top of the condensing tank, passing through the heat exchange cylinder to exchange heat with the raw material. In this utility model, when TDI vapor passes through the heat exchange cylinder, it can exchange heat with the incoming material, reducing the difficulty of TDI condensation and raw material heating, saving energy and costs, and also preheating the air to prevent affecting the evaporation effect.

Description

Technical Field

[0001] This utility model belongs to the field of curing agent free Tdi separation technology, and in particular relates to a curing agent free Tdi monomer separation device. Background Technology

[0002] Free TDI separation technology for curing agents is a key environmentally friendly process in the production of polyurethane materials. TDI (toluene diisocyanate), as the core component of curing agents, has toxic free monomers that need to be removed by a separation device. The separated curing agent retains excellent crosslinking properties, improves operational safety, and reduces the release of volatile harmful substances. It is widely used in coatings, adhesives, and elastomers.

[0003] While existing separation devices can effectively separate TDI, the heat in the steam is wasted when the evaporated TDI is directly condensed through the pipeline, which increases the difficulty of cooling and heating, thus wasting energy. Therefore, a free TDI monomer separation device for curing agent is proposed. Utility Model Content

[0004] The purpose of this invention is to provide a device for separating free TDI monomers from curing agents. When TDI vapor passes through the heat exchange cylinder, it can exchange heat with the incoming material, reducing the difficulty of TDI condensation and raw material heating, saving energy and costs. At the same time, it can also preheat the air to prevent affecting the evaporation effect, thus solving the existing technical problems.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] A device for separating free Tdi monomers of curing agent includes: a heating tank and a condensing tank fixed on the top of a frame, and a first recovery tank and a second recovery tank fixed on the bottom of the frame, wherein a first discharge pipe is fixedly connected between the heating tank and the first recovery tank;

[0007] A heat exchange cylinder is fixedly connected between the top of the heating tank and the top of the condensing tank. A feeding pipe is fixedly connected to the top of the heat exchange cylinder. A connecting pipe is fixedly connected between the bottom of the heat exchange cylinder and the heating tank. An intermediate pipe is fixedly connected between the top of the heating tank and the top of the condensing tank. The intermediate pipe passes through the heat exchange cylinder to exchange heat with the raw material. When TDI vapor passes through the heat exchange cylinder, it can exchange heat with the incoming material, reducing the difficulty of TDI condensation and the difficulty of heating the raw material, and saving energy and costs.

[0008] An evaporation mechanism, which is disposed inside a heating tank, is used to evaporate TDI;

[0009] A condensation mechanism is installed inside a condensation tank for condensing TDI.

[0010] As a further embodiment of this utility model, the evaporation mechanism includes a drive shaft, which is hollow and rotatably connected to the top of the heating tank. Multiple paddles for spreading raw materials are fixedly connected to the circumference of the drive shaft. A gap for the raw materials to pass through is provided between the paddles and the heating tank. A trumpet-shaped distributing plate for dispersing raw materials is fixedly connected between the tops of the multiple paddles.

[0011] As a further embodiment of this invention, a motor is fixedly connected to the top of the heating tank, and one end of the motor output shaft is connected to the drive shaft via a belt and pulley.

[0012] As a further embodiment of this utility model, a fan is fixedly connected to the top of the frame, and an air pipe is fixedly connected to the air outlet of the fan. The air pipe passes through the heat exchange cylinder, and a rotary joint is installed between the air pipe and the drive shaft. When the air pipe passes through the heat exchange cylinder, it can also preheat the air to prevent affecting the evaporation effect.

[0013] As a further embodiment of this utility model, a filter box is fixedly connected to the top of the frame, a filter screen is fixedly fixed to one side of the filter box, and the exhaust end of the fan is fixedly connected to the filter box.

[0014] As a further embodiment of this invention, a heating wire is fixedly installed on the outer wall of the heating tank.

[0015] As a further embodiment of this utility model, the outer wall of the heating tank and the outer wall of the condensing tank are both fixedly connected with heat insulation sleeves, and the heating wire is located between the heating tank and the heat insulation sleeves on its outer wall.

[0016] As a further embodiment of this utility model, the condensation mechanism includes a spiral tube, the top of which is fixedly connected to the middle tube, and the bottom of which is fixedly connected to the second recovery tank via a second discharge pipe. A water pipe connected to a cooling water circulation pipeline is fixedly connected to one side of the bottom and one side of the top of the condensation tank.

[0017] In this application, during use, the heating wire is activated to preheat the heating tank. Then, the curing agent is injected into the heat exchange cylinder through the feeding pipe and then enters the heating tank through the connecting pipe. At the same time, the motor and fan are activated. The motor drives the drive shaft, the distribution plate, and the deflector to rotate, thereby pushing the falling raw material towards the side wall of the heating tank, forming a thin layer on the inner wall of the heating tank. Combined with heating, the TDI in it vaporizes and evaporates. The raw material separated from TDI falls into the first recovery tank for collection, while the fan blows air into the heating tank, causing the evaporated TDI to enter the spiral tube along the middle pipe for condensation. During condensation, cooling water is injected into the condensation tank, so that the evaporated TDI is recovered to the second recovery tank. When the TDI vapor passes through the heat exchange cylinder, it can exchange heat with the incoming material, reducing the difficulty of TDI condensation and raw material heating, saving energy and costs. At the same time, the air pipe passing through the heat exchange cylinder can also preheat the air, preventing it from affecting the evaporation effect.

[0018] The embodiments of this utility model have the following beneficial effects:

[0019] In this invention, by installing a heat exchange cylinder between the heating tank and the condensing tank, TDI vapor can exchange heat with the incoming material when passing through the heat exchange cylinder, reducing the difficulty of TDI condensation and the difficulty of heating the raw materials, and saving energy and costs.

[0020] In this invention, by setting the air pipe to pass through the heat exchange cylinder, the air can be preheated as the air pipe passes through the heat exchange cylinder, thus preventing any impact on the evaporation effect.

[0021] In this invention, when TDI vapor passes through the heat exchange cylinder, it can exchange heat with the incoming material, reducing the difficulty of TDI condensation and raw material heating, saving energy and costs, and also preheating the air to prevent affecting the evaporation effect.

[0022] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a three-dimensional structural schematic diagram from a first perspective of an embodiment of the present invention.

[0025] Figure 2 This is a three-dimensional structural schematic diagram from a second perspective of an embodiment of the present invention.

[0026] Figure 3 This is a cross-sectional structural diagram of an embodiment of the present invention.

[0027] Figure 4 This is an embodiment of the present utility model. Figure 3 A magnified structural diagram of point A in the middle.

[0028] In the diagram: 1. Frame; 2. Heating tank; 3. Condensation tank; 4. First recovery tank; 5. Second recovery tank; 6. Fan; 7. Air pipe; 8. Filter box; 9. Drive shaft; 10. Distributor plate; 11. Dial plate; 12. Heating wire; 13. First discharge pipe; 14. Intermediate pipe; 15. Spiral pipe; 16. Second discharge pipe; 17. Heat insulation jacket; 18. Motor; 19. Rotary joint; 20. Heat exchange cylinder; 21. Feeding pipe; 22. Connecting pipe. Detailed Implementation

[0029] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0030] To keep the following description of the embodiments of this utility model clear and concise, detailed descriptions of known functions and known components are omitted.

[0031] Example 1

[0032] Please see Figures 1-4 As shown, this embodiment provides a separation device, including: a heating tank 2 and a condensing tank 3 fixed on the top of the frame 1, and a first recovery tank 4 and a second recovery tank 5 fixed on the bottom of the frame 1. A first discharge pipe 13 is fixedly connected between the heating tank 2 and the first recovery tank 4. The raw material for separating TDI will fall into the first recovery tank 4 for collection.

[0033] A heat exchange cylinder 20 is fixedly connected between the top of the heating tank 2 and the top of the condensing tank 3. A feeding pipe 21 is fixedly connected to the top of the heat exchange cylinder 20. A connecting pipe 22 is fixedly connected between the bottom of the heat exchange cylinder 20 and the heating tank 2. An intermediate pipe 14 is fixedly connected between the top of the heating tank 2 and the top of the condensing tank 3. The intermediate pipe 14 passes through the heat exchange cylinder 20 and exchanges heat with the raw material. When TDI vapor passes through the heat exchange cylinder 20, it can exchange heat with the incoming material, reducing the difficulty of TDI condensation and the difficulty of heating the raw material, and saving energy and cost.

[0034] Evaporation mechanism, which is installed inside heating tank 2, is used to evaporate TDI;

[0035] The condensing mechanism is installed inside the condensing tank 3 for condensing TDI.

[0036] In this invention, the evaporation mechanism includes a drive shaft 9, which is hollow and rotatably connected to the top of the heating tank 2. Multiple paddles 11 for spreading raw materials are fixedly connected to the circumference of the drive shaft 9. A gap is provided between the paddles 11 and the heating tank 2 for the raw materials to pass through. A trumpet-shaped distributing plate 10 for dispersing raw materials is fixedly connected between the tops of the multiple paddles 11. A motor 18 is fixedly connected to the top of the heating tank 2. One end of the output shaft of the motor 18 is connected to the drive shaft 9 via a belt and pulley. When the motor 18 starts, it drives the drive shaft 9, the distributing plate 10 and the paddles 11 to rotate, thereby pushing the falling raw materials toward the side wall of the heating tank 2, so that they form a thin layer on the inner wall of the heating tank 2, and cooperate with heating to vaporize and evaporate the TDI therein.

[0037] This application can be used in the field of separating free Tdi from curing agents, or in other fields applicable to this application.

[0038] Example 2

[0039] Improvements based on Example 1: See Appendix Figures 1-4 A device for separating free Tdi monomers of curing agent includes: its application in the field of separating free Tdi of curing agent.

[0040] In this invention, a fan 6 is fixedly connected to the top of the frame 1, and an air pipe 7 is fixedly connected to the outlet of the fan 6. The air pipe 7 passes through the heat exchange cylinder 20, and a rotary joint 19 is installed between the air pipe 7 and the drive shaft 9. The fan 6 blows air into the heating tank 2, thereby causing the evaporated TDI to enter the spiral tube 15 along the intermediate tube 14 for condensation. The fan 6 can be replaced by a vacuum pump, which draws air from the second recovery tank 5, thereby causing the TDI vapor to enter the spiral tube 15 for condensation.

[0041] In particular, a filter box 8 is fixedly connected to the top of the frame 1, and a filter screen is fixed to one side of the filter box 8. The exhaust end of the fan 6 is fixedly connected to the filter box 8, and dust contamination is prevented from entering the heating tank 2 through the filter screen.

[0042] It should be noted that a heating wire 12 is fixedly installed on the outer wall of the heating tank 2. The heating wire 12 is used to heat the heating tank 2 to facilitate TDI evaporation.

[0043] In this invention, the outer wall of the heating tank 2 and the outer wall of the condensing tank 3 are both fixedly connected with heat insulation sleeves 17. The heating wire 12 is located between the heating tank 2 and the heat insulation sleeve 17 on its outer wall. The heat insulation sleeve 17 is made of heat insulation cotton to reduce heat loss.

[0044] In particular, the condensation mechanism includes a spiral tube 15, the top of which is fixedly connected to the intermediate tube 14, and the bottom of which is fixedly connected to the second recovery tank 5 via a second discharge pipe 16. Water pipes connected to the cooling water circulation pipeline are fixedly connected to one side of the bottom and one side of the top of the condensation tank 3. The evaporated TDI enters the spiral tube 15 along the intermediate tube 14 for condensation, and then enters the second recovery tank 5 for temporary storage.

[0045] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0046] It should be noted that in the description of this specification, descriptions such as "first" and "second" are only used to distinguish the features and do not have any actual order or directional meaning. This application is not limited to this.

[0047] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0048] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A curing agent free Tdi monomer separation device characterized by, include: A heating tank (2) and a condensing tank (3) are fixed on the top of the frame (1), and a first recovery tank (4) and a second recovery tank (5) are fixed on the bottom of the frame (1). A first discharge pipe (13) is fixedly connected between the heating tank (2) and the first recovery tank (4). A heat exchange cylinder (20) is fixedly connected between the top of the heating tank (2) and the condensing tank (3). A feeding pipe (21) is fixedly connected to the top of the heat exchange cylinder (20). A connecting pipe (22) is fixedly connected between the bottom of the heat exchange cylinder (20) and the heating tank (2). An intermediate pipe (14) is fixedly connected between the top of the heating tank (2) and the top of the condensing tank (3). The intermediate pipe (14) passes through the heat exchange cylinder (20) and exchanges heat with the raw material. An evaporation mechanism is provided inside a heating tank (2) for evaporating TDI; A condensing mechanism is installed inside a condensing tank (3) for condensing TDI.

2. The curing agent free Tdi monomer separation device as described in claim 1, characterized in that, The evaporation mechanism includes a drive shaft (9), which is hollow and rotatably connected to the top of the heating tank (2). Multiple paddles (11) for spreading raw materials are fixedly connected to the circumference of the drive shaft (9). A gap for raw materials to pass through is provided between the paddles (11) and the heating tank (2). A trumpet-shaped distributing plate (10) for dispersing raw materials is fixedly connected between the tops of the multiple paddles (11).

3. The curing agent free Tdi monomer separation device as described in claim 2, characterized in that, The top of the heating tank (2) is fixedly connected to a motor (18), and one end of the output shaft of the motor (18) is connected to the drive shaft (9) via a belt and pulley.

4. The curing agent free Tdi monomer separation device as described in claim 2, characterized in that, A fan (6) is fixedly connected to the top of the frame (1), and an air pipe (7) is fixedly connected to the air outlet of the fan (6). The air pipe (7) passes through the heat exchange cylinder (20), and a rotary joint (19) is installed between the air pipe (7) and the drive shaft (9).

5. The curing agent free Tdi monomer separation device as described in claim 4, characterized in that, A filter box (8) is fixedly connected to the top of the frame (1), and a filter screen is fixed to one side of the filter box (8). The exhaust end of the fan (6) is fixedly connected to the filter box (8).

6. The curing agent free Tdi monomer separation device as described in claim 2, characterized in that, A heating wire (12) is fixedly installed on the outer wall of the heating tank (2).

7. The curing agent free Tdi monomer separation device as described in claim 6, characterized in that, The outer wall of the heating tank (2) and the outer wall of the condensing tank (3) are both fixedly connected with heat insulation sleeves (17), and the heating wire (12) is located between the heating tank (2) and the heat insulation sleeves (17) on its outer wall.

8. The curing agent free Tdi monomer separation device as described in claim 1, characterized in that, The condensation mechanism includes a spiral tube (15), the top of the spiral tube (15) is fixedly connected to the middle tube (14), the bottom of the spiral tube (15) is fixedly connected to the second recovery tank (5) and a second discharge pipe (16) is fixedly connected, and the bottom side and the top side of the condensation tank (3) are both fixedly connected to water pipes that are connected to the cooling water circulation pipeline.

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