A gas phase octanol waste heat recovery heat exchange device for DOTP production

Abstract

The utility model discloses a kind of gas phase octanol waste heat recovery heat exchange devices for DOTP production, including production tank, filter tank and cooling tank, the side of production tank is equipped with conveying pump, conveying pump one end is connected with gas pipe and the other end of gas pipe is connected in the side of filter tank, cooling pipe is fixedly connected between the side of filter tank and cooling tank, high-temperature gas phase octanol gas generated in production tank is conveyed to filter tank by gas pipe under the action of conveying pump, after impurity in gas is filtered by filter component, gas enters cooling pipe, cooling pipe is installed in cooling tank interior in inclined mode, gas in pipe and cooling water in cooling tank are fully heat exchanged, gas phase octanol condenses into liquid state and flows to low place along inclined cooling pipe when cooling, finally, from the end of cooling pipe that extends cooling tank, waste heat recovery and gas phase octanol recycling are realized.

Description

Technical Field

[0001] This utility model relates to the field of DOTP production technology, specifically to a gas-phase octanol waste heat recovery heat exchanger for DOTP production. Background Technology

[0002] DOTP (dioctyl terephthalate) is a high-performance, environmentally friendly plasticizer widely used in the plastics, rubber, and cable industries. With increasingly stringent environmental requirements and the rapid development of downstream industries, its market demand continues to grow. In the industrial production of DOTP, it is usually prepared by esterification reaction of terephthalic acid and octanol. During the reaction, a large amount of high-temperature gaseous octanol gas is generated. Octanol is one of the key raw materials for DOTP production and has high economic value. At the same time, the large amount of waste heat carried by the gaseous octanol also has the potential for recycling.

[0003] In the industry, the gaseous octanol generated during DOTP production is mostly recovered through direct condensation or treated by simple emission. In the direct condensation recovery scheme, the commonly used cooling device is a straight-tube condenser. The heat exchange efficiency between the gaseous octanol and the cooling water is low, resulting in insufficient condensation. Some octanol gas is not effectively recovered, resulting in raw material waste and a large amount of heat energy contained in the gas phase. On the other hand, simple emission treatment not only causes serious resource waste, but also pollutes the surrounding environment due to the volatility of octanol gas, which does not meet environmental protection policy requirements. Therefore, it is necessary to design a gaseous octanol waste heat recovery heat exchange device for DOTP production to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a heat exchange device for recovering waste heat of gas-phase octanol in DOTP production, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a heat exchange device for waste heat recovery of gas phase octanol in DOTP production, comprising a production tank, a filter tank and a cooling tank, wherein a delivery pump is installed on one side of the production tank, one end of the delivery pump is connected to a gas delivery pipe and the other end of the gas delivery pipe is connected to one side of the filter tank, and a cooling pipe is fixedly connected between one side of the filter tank and the cooling tank. The cooling pipe is inclined and located inside the cooling box. One end of the cooling pipe passes through the cooling box and is located on the outside of the cooling box. The filter box is detachably connected to a filter assembly to filter the delivered gas.

[0006] Preferably, the filter assembly includes a top plate, a support frame, and a filter layer. Two sets of the support frames are fixedly connected to the bottom ends of the top plate, and two sets of the filter layers are respectively disposed inside the two sets of support frames. When the top plate moves to the top of the filter box, the support frames are located inside the filter box.

[0007] Preferably, the top of the filter box has a locking groove at the middle, and the top plate is locked inside the locking groove.

[0008] Preferably, magnetic suction grooves are provided at both ends of the inner cavity of the locking groove, and magnetic suction blocks are fixedly connected to both ends of the bottom of the top plate.

[0009] Preferably, a sealing strip is adhered to the bottom of the top plate, and a pull rod is screwed to the top of the top plate.

[0010] Preferably, the bottom of the cooling box is provided with an inclined plate, and a drain pipe is fixedly connected to the outside of the cooling box at the lowest end of the inclined plate. A manual valve is installed on the outside of the drain pipe.

[0011] Compared with the prior art, the beneficial effects of this utility model are: 1. The high-temperature gaseous octanol generated in the production chamber is transported to the filter chamber through the gas delivery pipe by the delivery pump. After the impurities in the gas are filtered out by the filter components, the gas enters the cooling pipe. The cooling pipe is installed at an angle inside the cooling chamber. The gas in the pipe exchanges heat fully with the cooling water in the cooling chamber. The gaseous octanol condenses into a liquid upon contact with the cold water and flows down the angled cooling pipe. Finally, it is discharged from the end of the cooling pipe that extends out of the cooling chamber, thus realizing the recovery of waste heat and the recycling of gaseous octanol.

[0012] 2. The top plate moves the support frame and filter layer out of the filter box. At this time, the filter layer can be cleaned or replaced. After that, align the support frame with the opening of the filter box and push the top plate down so that the support frame and filter layer are completely inserted into the filter box. The filtration operation can then be restarted. The magnetic block at the bottom of the top plate will attract each other with the magnetic groove in the locking slot, further enhancing the connection stability between the top plate and the filter box and preventing gas leakage. Attached Figure Description

[0013] Figure 1 This is a first-view structural diagram of the present invention; Figure 2 This is a schematic diagram of the second-view structure of the present invention; Figure 3 This utility model Figure 1 Enlarged view of point A; Figure 4 This utility model Figure 2 Enlarged diagram of point B.

[0014] In the diagram: 1. Production box, 2. Filter box, 3. Cooling box, 4. Delivery pump, 5. Gas supply pipe, 6. Cooling pipe, 7. Top plate, 8. Support frame, 9. Filter layer, 10. Locking groove, 11. Sealing strip, 12. Magnetic groove, 13. Magnetic block, 14. Pull rod, 15. Inclined plate, 16. Drain pipe, 17. Manual valve. Detailed Implementation

[0015] 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.

[0016] Example 1 Please refer to Figure 1-4 As shown, this utility model provides a gas phase octanol waste heat recovery heat exchange device for DOTP production, including a production tank 1, a filter tank 2 and a cooling tank 3. A delivery pump 4 is installed on one side of the production tank 1. One end of the delivery pump 4 is connected to a gas delivery pipe 5 and the other end of the gas delivery pipe 5 is connected to one side of the filter tank 2. A cooling pipe 6 is fixedly connected between one side of the filter tank 2 and the cooling tank 3. The cooling pipe 6 is located at an angle inside the cooling box 3. One end of the cooling pipe 6 passes through the cooling box 3 and is located on the outside of the cooling box 3. The filter box 2 is detachably connected to a filter assembly to filter the delivered gas.

[0017] Specifically, the high-temperature gaseous octanol gas generated in the production chamber 1 is transported to the filter chamber 2 through the gas delivery pipe 5 by the delivery pump 4. After the impurities in the gas are filtered out by the filter components, the gas enters the cooling pipe 6. The cooling pipe 6 is installed at an angle inside the cooling chamber 3. The gas in the pipe exchanges heat fully with the cooling water in the cooling chamber 3. The gaseous octanol condenses into a liquid upon contact with the cold and flows down the angled cooling pipe 6. Finally, it is discharged from one end of the cooling pipe 6 that extends out of the cooling chamber 3, thus realizing the recovery of waste heat and the recycling of gaseous octanol.

[0018] The filter assembly includes a top plate 7, a support frame 8, and a filter layer 9. Two sets of support frames 8 are fixedly connected to the bottom ends of the top plate 7, and two sets of filter layers 9 are respectively set inside the two sets of support frames 8. When the top plate 7 moves to the top of the filter box 2, the support frames 8 are located inside the filter box 2. The top plate 7 drives the support frames 8 and filter layers 9 to move out of the filter box 2. At this time, the filter layers 9 can be cleaned or replaced. After completion, the support frames 8 are aligned with the opening of the filter box 2, and the top plate 7 is pushed down so that the support frames 8 and filter layers 9 are completely inserted into the filter box 2, and the filtration operation can be restarted.

[0019] The filter box 2 has a locking groove 10 at the top center. The top plate 7 is locked inside the locking groove 10. By aligning the top plate 7 with the locking groove 10 on the top of the filter box 2 and pressing the top plate 7 down to lock it into the locking groove 10, the positioning and installation of the filter assembly can be completed quickly, ensuring that the filter assembly will not be displaced during operation.

[0020] Wherein: magnetic suction grooves 12 are provided at both ends of the inner side of the locking groove 10, and magnetic suction blocks 13 are fixedly connected at both ends of the bottom of the top plate 7. When the top plate 7 is locked into the locking groove 10, the magnetic suction blocks 13 at the bottom of the top plate 7 will attract each other to the magnetic suction grooves 12 in the locking groove 10, further enhancing the connection stability between the top plate 7 and the filter box 2 and preventing gas leakage.

[0021] The top plate 7 has a sealing strip 11 attached to its bottom, and a pull rod 14 is fixed to the top of the top plate 7 with screws. After the top plate 7 is inserted into the locking groove 10, the sealing strip 11 at the bottom of the top plate 7 will fit tightly against the inner wall of the locking groove 10, effectively improving the sealing performance of the filter box 2 and preventing unfiltered gas from escaping. When it is necessary to disassemble the filter assembly, simply pull the pull rod 14 to easily remove the top plate 7 and the filter structure below it, making the operation convenient.

[0022] The cooling box 3 has an inclined plate 15 at its bottom. A drain pipe 16 is fixedly connected to the lowest end of the inclined plate 15 on the outside of the cooling box 3. A manual valve 17 is installed on the outside of the drain pipe 16. The condensate is naturally collected at the lowest end of the inclined plate 15 inside the cooling box 3. When the manual valve 17 is opened, the condensate can be quickly discharged from the cooling box 3 through the drain pipe 16 for water replacement.

[0023] Working Principle: This utility model provides a waste heat recovery heat exchange device for DOTP production of vapor phase octanol. The high-temperature vapor phase octanol gas generated in the production tank 1 is transported to the filter tank 2 through the gas delivery pipe 5 by the delivery pump 4. After the impurities in the gas are filtered out by the filter layer 9, the gas enters the cooling pipe 6. The cooling pipe 6 is installed at an inclination inside the cooling tank 3. The gas in the pipe exchanges heat fully with the cooling water in the cooling tank 3. The vapor phase octanol condenses into a liquid state upon contact with the cold and flows down the inclined cooling pipe 6. Finally, it is discharged from one end of the cooling pipe 6 that extends out of the cooling tank 3, thus realizing the recovery of waste heat and the recycling of vapor phase octanol. The contents not described in detail in this description are existing technologies known to those skilled in the art.

[0024] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A heat exchange device for recovering waste heat from octanol in the production of DOTP, comprising a production chamber (1), a filter chamber (2), and a cooling chamber (3), characterized in that: A delivery pump (4) is installed on one side of the production box (1). One end of the delivery pump (4) is connected to a gas delivery pipe (5), and the other end of the gas delivery pipe (5) is connected to one side of the filter box (2). A cooling pipe (6) is fixedly connected between one side of the filter box (2) and the cooling box (3). The cooling pipe (6) is located at an angle inside the cooling box (3). One end of the cooling pipe (6) passes through the cooling box (3) and is located outside the cooling box (3). The filter box (2) is detachably connected to a filter assembly to filter the delivered gas.

2. The gas-phase octanol waste heat recovery heat exchanger for DOTP production according to claim 1, characterized in that: The filter assembly includes a top plate (7), a support frame (8) and a filter layer (9). Two sets of support frames (8) are fixedly connected to the bottom ends of the top plate (7). Two sets of filter layers (9) are respectively disposed inside the two sets of support frames (8). When the top plate (7) moves to the top of the filter box (2), the support frame (8) is located inside the filter box (2).

3. A waste heat recovery heat exchanger for octanol in DOTP production according to claim 2, characterized in that: The filter box (2) has a locking groove (10) at the top center, and the top plate (7) is locked inside the locking groove (10).

4. A waste heat recovery heat exchanger for DOTP production of vapor-phase octanol according to claim 3, characterized in that: The inner ends of the locking groove (10) are respectively provided with magnetic suction grooves (12), and the bottom ends of the top plate (7) are respectively fixedly connected with magnetic suction blocks (13).

5. A waste heat recovery heat exchanger for DOTP production of vapor-phase octanol according to claim 4, characterized in that: A sealing strip (11) is glued to the bottom of the top plate (7), and a pull rod (14) is screwed to the top of the top plate (7).

6. A waste heat recovery heat exchanger for volumetric octanol production according to claim 1, characterized in that: The bottom of the cooling box (3) is provided with an inclined plate (15), and a drain pipe (16) is fixedly connected to the lowest end of the inclined plate (15) on the outside of the cooling box (3). A manual valve (17) is installed on the outside of the drain pipe (16).

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