POP exhaust condensation trapping device

Abstract

The utility model belongs to the technical field of chemical equipment, and particularly relates to a POP exhaust condensation trapping device. Comprising a condenser body, an inner cavity of the condenser body is a communicated heat exchange cavity, and a circulating water pipeline and a saline water pipeline are sequentially arranged in the heat exchange cavity; the air inlet is communicated with the heat exchange cavity area where the circulating water pipeline is located; the exhaust port is communicated with the heat exchange cavity area where the saline water pipeline is located; solvent inlets are formed in the positions, corresponding to the heat exchange cavity areas where the circulating water pipeline and the saline water pipeline are located, of the bottom of the condenser body. Solvent outlets are formed in the positions, corresponding to the two heat exchange cavity areas, of the top of the condenser body. The first thermometer and the second thermometer penetrate through the side wall of the condenser body, and the temperature measuring ends of the first thermometer and the second thermometer extend into heat exchange cavity areas corresponding to the circulating water pipeline and the saline water pipeline correspondingly. According to the device, due to the design of a gradient cooling and dense heat exchange structure, tar can be efficiently condensed, pipeline blockage is avoided from the source, the maintenance cost is reduced, and stable operation of the device is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of chemical equipment technology, specifically relating to a POP exhaust condensation and collection device. Background Technology

[0002] Polymer polyols (POPs) are functional materials modified from polyether polyols. By introducing vinyl polymer monomers such as styrene and acrylonitrile into polyether polyols and stabilizing polymer particles with special polyether dispersants, they are widely used in the production of flexible polyurethane foam. They can significantly improve the load-bearing capacity, resilience and cell uniformity of the products, and thus have been widely used in automobiles, furniture, mattresses and other fields.

[0003] In the industrial production of POP (Polymer Producer), monomers such as styrene, acrylonitrile, and isopropanol undergo high-temperature polymerization, requiring the removal of unreacted residual monomers. This process generates tar-like byproducts, which easily solidify and adhere to the surface of condensing devices, leading to decreased heat exchange efficiency. Current technologies often use propylene carbonate to clean the solidified tar, but this process generates white particulate impurities. These impurities easily clog the exhaust gas pipeline in the pre-cooling section, causing poor venting of the vacuum pipeline and necessitating frequent pipeline replacements. This not only increases equipment maintenance costs and production downtime but also affects production continuity and product quality stability. Currently, conventional condensation and collection devices mostly use a single heat exchange medium, making it difficult to balance tar condensation efficiency with convenient subsequent cleaning. They cannot effectively solve the dual problems of tar adhesion and white particulate clogging. Therefore, there is an urgent need for a dedicated condensation and collection device that can efficiently condense tar, facilitate online cleaning, and avoid pipeline clogging. Utility Model Content

[0004] To address the shortcomings of existing technologies, the present invention aims to provide a POP exhaust gas condensation and collection device. Through a gradient cooling design, the device efficiently cools the POP production exhaust gas to the target temperature, allowing tar to fully solidify and adhere, preventing it from entering subsequent pipelines and reducing the risk of white particle generation and pipeline blockage from the source. Simultaneously, the densely arranged pipeline design significantly increases the contact area between the exhaust gas and the heat exchange pipelines, improving condensation efficiency and tar collection effect. Furthermore, it features real-time temperature monitoring to accurately determine the cleaning timing. Combined with an integrated online cleaning and solvent recycling design, it eliminates the need for frequent equipment disassembly or pipeline replacement, effectively reducing maintenance costs and downtime, and ensuring continuous and efficient operation of the device.

[0005] This utility model is achieved using the following technical solution:

[0006] The POP exhaust condensation and capture device includes a condenser body, a circulating water pipeline, a brine pipeline, an air inlet, an exhaust outlet, a first thermometer, and a second thermometer. The condenser body is a horizontal shell structure with a connected heat exchange chamber inside. The circulating water pipeline and the brine pipeline are arranged sequentially in the heat exchange chamber along the gas flow direction, forming a continuous exhaust gas flow channel on the outside of the circulating water pipeline and the brine pipeline. The air inlet is located on the side wall of the condenser body and is connected to the heat exchange chamber area where the circulating water pipeline is located. The exhaust outlet is located on the top of the side wall of the opposite side of the condenser body and is connected to the heat exchange chamber area where the brine pipeline is located. At the bottom of the condenser body, solvent inlets are provided corresponding to the heat exchange chamber areas where the circulating water pipeline and the brine pipeline are located. At the top of the condenser body, solvent outlets are provided corresponding to the heat exchange chamber areas where the circulating water pipeline and the brine pipeline are located. The first thermometer and the second thermometer penetrate the side wall of the condenser body, and their measuring ends extend into the heat exchange chamber areas corresponding to the circulating water pipeline and the brine pipeline, respectively.

[0007] The bottom inlet and top outlet of the circulating water pipeline are respectively connected to a circulating water inlet and a circulating water outlet; the bottom inlet and top outlet of the brine pipeline are respectively connected to a brine inlet and a brine outlet.

[0008] The solvent inlet and solvent outlet are connected to the outlet and inlet of the solvent storage tank, respectively, to achieve the recycling of the cleaning solvent.

[0009] The circulating water pipeline and brine pipeline are arranged in a dense pattern to fill their respective heat exchange chamber areas, thereby increasing the contact area between the exhaust gas and the outer wall of the pipeline.

[0010] The top of the condenser body is also equipped with a solvent backup outlet and a safety valve.

[0011] The end cap of the condenser body is provided with a manhole, which is a quick-opening structure and equipped with a sealing cover.

[0012] The working principle of the POP exhaust condensate collection device is as follows:

[0013] This POP exhaust gas condensation and capture device uses a condenser body as its carrier. Inside its interconnected heat exchange chamber, circulating water pipes and brine pipes are arranged sequentially along the gas flow direction. Together, they form a continuous exhaust gas flow channel. During operation, 28°C circulating water enters the circulating water pipes through the inlet, undergoes heat exchange, and exits through the outlet. -10°C low-temperature brine enters the brine pipes through the inlet, undergoes heat exchange, and exits through the outlet. The two heat exchange media circulate independently within their respective pipes, providing a gradient cooling environment for the heat exchange chamber. Simultaneously, 50-60°C POP production exhaust gas enters the heat exchange chamber area containing the circulating water pipes through the inlet. It first undergoes initial cooling through heat exchange with the outer wall of the circulating water pipes, then flows through the heat exchange chamber area containing the brine pipes for further cooling to approximately 0°C, and finally exits through the exhaust port. During the exhaust gas cooling process, the tar contained within solidifies and adheres to the outer walls of the circulating water and brine pipelines. At this time, the first and second thermometers monitor the temperature of the two heat exchange chamber areas in real time. When the exhaust gas cooling rate falls below a preset threshold, it is determined that the amount of tar adhering to the pipeline outer walls has affected heat exchange efficiency, and the cleaning process is initiated. During cleaning, propylene carbonate in the solvent storage tank enters the heat exchange chambers through the solvent inlets corresponding to the two heat exchange chamber areas at the bottom of the condenser body. It remains in the chambers and fully wets the outer walls of the circulating water and brine pipelines, dissolving the solidified tar. After cleaning, the tar-containing solvent flows back to the solvent storage tank for recycling through the solvent outlets corresponding to the two heat exchange chamber areas at the top of the condenser body. If the exhaust gas temperature drop after cleaning still does not reach the expected level, it indicates that the solvent is saturated and new propylene carbonate needs to be replaced for cleaning again. Furthermore, a backup solvent outlet at the top of the condenser body can handle solvent discharge needs under special operating conditions, a safety valve ensures safe operating pressure, and a quick-opening manhole at the end facilitates daily inspection and maintenance of the equipment.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] (1) The POP exhaust gas condensation and collection device described in this utility model can efficiently cool the POP production exhaust gas to the target temperature through gradient cooling design, so that the tar can be fully solidified and attached to the outer wall of the pipeline, preventing it from entering the subsequent pipeline, thus reducing the risk of white particle generation and blockage from the source.

[0016] (2) The POP exhaust gas condensation and collection device described in this utility model adopts a densely arranged pipeline design, which greatly increases the contact area between the exhaust gas and the heat exchange pipeline, and improves the condensation efficiency and tar collection effect.

[0017] (3) The POP exhaust condensation capture device described in this utility model has a real-time temperature monitoring function, which can accurately determine the cleaning time and ensure that the device is always in a high-efficiency operating state; at the same time, the integrated online cleaning and solvent recycling design eliminates the need for frequent disassembly of equipment or replacement of pipelines, effectively reducing maintenance costs and downtime. Attached Figure Description

[0018] Figure 1 This is a front view of the POP exhaust condensate collection device described in this utility model;

[0019] Figure 2 This is a top view of the POP exhaust condensation collection device described in this utility model;

[0020] Figure 3 This is a left view of the POP exhaust condensation collection device described in this utility model;

[0021] In the diagram: 1. Condenser body; 2. Air inlet; 3. Exhaust outlet; 4. Circulating water pipeline; 5. Brine pipeline; 6. Circulating water inlet; 7. Circulating water outlet; 8. Brine inlet; 9. Brine outlet; 10. Solvent inlet; 11. Solvent outlet; 12. Solvent backup outlet; 13. First thermometer; 14. Second thermometer; 15. Safety valve; 16. Manhole. Detailed Implementation

[0022] To make the objectives and technical solutions of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0023] Example 1

[0024] like Figure 1-3As shown, the POP exhaust condensation and capture device includes a condenser body 1, a circulating water pipeline 4, a brine pipeline 5, an air inlet 2, an exhaust outlet 3, a first thermometer 13, and a second thermometer 14. The condenser body 1 is a horizontal shell structure, and its internal cavity is a connected heat exchange chamber. The circulating water pipeline 4 and the brine pipeline 5 are arranged sequentially in the heat exchange chamber along the gas flow direction, forming a continuous exhaust gas flow channel on the outside of the circulating water pipeline 4 and the brine pipeline 5. The air inlet 2 is located on the side wall of the condenser body 1 and is connected to the heat exchange chamber area where the circulating water pipeline 4 is located. The exhaust port 3 is located on the top of the side wall of the condenser body 1 on the opposite side and is connected to the heat exchange chamber area where the brine pipe 5 is located. At the bottom of the condenser body 1, a solvent inlet 10 is provided for each heat exchange chamber area where the circulating water pipe 4 and the brine pipe 5 are located. At the top of the condenser body 1, a solvent outlet 11 is provided for each heat exchange chamber area where the circulating water pipe 4 and the brine pipe 5 are located. The first thermometer 13 and the second thermometer 14 pass through the side wall of the condenser body 1 respectively, and their measuring ends extend into the heat exchange chamber areas corresponding to the circulating water pipe 4 and the brine pipe 5 respectively.

[0025] The bottom inlet of the circulating water pipeline 4 and the top outlet are respectively connected to a circulating water inlet 6 and a circulating water outlet 7; the bottom inlet of the brine pipeline 5 and the top outlet are respectively connected to a brine inlet 8 and a brine outlet 9.

[0026] The solvent inlet 10 and solvent outlet 11 are respectively connected to the outlet and inlet of the solvent storage tank.

[0027] The circulating water pipeline 4 and the brine pipeline 5 are arranged in a dense manner to fill their respective heat exchange chamber areas.

[0028] The top of the condenser body 1 is also provided with a solvent backup outlet 12 and a safety valve 15.

[0029] The end cap of the condenser body 1 is provided with a manhole 16, which is a quick-opening structure and equipped with a sealing cover.

[0030] The specific steps for doing this are as follows:

[0031] First, a heat exchange medium is introduced into the device. 28°C circulating water enters the circulating water pipeline 4 through the circulating water inlet 6, and after heat exchange, it is discharged from the circulating water outlet 7 to form a circulation. -10°C low-temperature brine enters the brine pipeline 5 through the brine inlet 8, and after heat exchange, it is discharged from the brine outlet 9 to form a circulation, so that the heat exchange chamber in the condenser body 1 forms a gradient cooling heat exchange environment. After the heat exchange medium circulation stabilizes, 55°C POP production tail gas is introduced into the heat exchange chamber area corresponding to the circulating water pipeline 4 in the condenser body 1 through the air inlet 2. The tail gas flows along the outside of the pipeline and exchanges heat with the circulating water pipeline 4 to achieve initial cooling. Then the tail gas continues to flow to the heat exchange chamber area corresponding to the brine pipeline 5, and after further heat exchange with the brine pipeline 5, it is cooled to about 0°C. The tar contained in the tail gas is fully solidified during the heat exchange process and adheres to the outer wall of the circulating water pipeline 4 and the brine pipeline 5. The tail gas that has completed cooling and tar capture is finally discharged through the exhaust port 3 into the subsequent vacuum pipeline. During device operation, the first thermometer 13 and the second thermometer 14 continuously monitor the temperature of the heat exchange chamber area corresponding to the circulating water pipeline 4 and the brine pipeline 5. When the monitoring data shows that the tail gas cooling rate is lower than the preset threshold, the tar cleaning process is started. At this time, propylene carbonate in the solvent storage tank enters the heat exchange chamber through the solvent inlet 10 at the bottom of the condenser body 1, stays in the chamber and fully wets the outer walls of the circulating water pipeline 4 and the brine pipeline 5, dissolving the attached tar. After the tar-containing solvent is dissolved, it flows back to the solvent storage tank through the solvent outlet 11 at the top of the condenser body 1, realizing the recycling of the solvent. If the tail gas cooling effect is not as expected after cleaning, it indicates that the solvent has reached saturation. After replacing with new propylene carbonate, the cleaning process can be repeated according to the above steps. During operation, the safety valve 15 on the top of the condenser body 1 can automatically release pressure when the internal pressure of the equipment is abnormal, ensuring the safe operation of the equipment. The solvent backup outlet 12 can meet various special discharge requirements during the cleaning process. The quick-opening manhole 16 on the end cap of the condenser body 1 can be opened periodically to inspect, check and maintain the inside of the equipment, ensuring the continuous and stable operation of the equipment.

Claims

1. A POP exhaust gas condensation trap apparatus, characterized by, The condenser includes a condenser body (1), a circulating water pipe (4), a brine pipe (5), an air inlet (2), an exhaust outlet (3), a first thermometer (13), and a second thermometer (14). The condenser body (1) is a horizontal shell structure with a connected heat exchange chamber inside. The circulating water pipe (4) and the brine pipe (5) are arranged sequentially in the heat exchange chamber along the gas flow direction, forming a continuous exhaust gas flow channel on the outside of the circulating water pipe (4) and the brine pipe (5). The air inlet (2) is located on the side wall of the condenser body (1) and is connected to the heat exchange chamber area where the circulating water pipe (4) is located. The exhaust outlet (3) is provided with... The top of the side wall on the opposite side of the condenser body (1) is connected to the heat exchange chamber area where the brine pipe (5) is located; at the bottom of the condenser body (1), a solvent inlet (10) is provided for the heat exchange chamber areas where the circulating water pipe (4) and the brine pipe (5) are located; at the top of the condenser body (1), a solvent outlet (11) is provided for the heat exchange chamber areas where the circulating water pipe (4) and the brine pipe (5) are located; the first thermometer (13) and the second thermometer (14) penetrate the side wall of the condenser body (1) respectively, and the measuring ends extend into the heat exchange chamber areas corresponding to the circulating water pipe (4) and the brine pipe (5) respectively.

2. The POP vent condensable capture device of claim 1, wherein, The bottom inlet and top outlet of the circulating water pipeline (4) are respectively connected to the circulating water inlet (6) and the circulating water outlet (7); the bottom inlet and top outlet of the brine pipeline (5) are respectively connected to the brine inlet (8) and the brine outlet (9).

3. The POP vent condensable capture device of claim 1, wherein, The solvent inlet (10) and solvent outlet (11) are respectively connected to the outlet and inlet of the solvent storage tank.

4. The POP vent condensable capture device of claim 1, wherein, The circulating water pipeline (4) and the brine pipeline (5) are arranged in a dense manner to fill their respective heat exchange chamber areas.

5. The POP vent condensable capture device of claim 1, wherein, The top of the condenser body (1) is also provided with a solvent backup outlet (12) and a safety valve (15).

6. The POP vent condensable capture device of claim 1, wherein, The condenser body (1) has a manhole (16) on its end cap. The manhole (16) is a quick-opening structure and is equipped with a sealing cap.

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