A waste gas cooling receiving device for ethylene glycol production

Abstract

The utility model discloses a kind of waste gas cooling receiving devices for ethylene glycol production, comprising: first turbulence block and second turbulence block in the heat exchange pipe inside, for conveying waste gas mixture in heat exchange pipe;The utility model is through the design of heat exchange pipe, boss, first turbulence block and second turbulence block and other structures, boss on heat exchange pipe deeply enters pipe center area, substantially increase the contact area of waste gas and pipe wall, prolong the contact time of pipe center waste gas, another first turbulence block breaks the stable flow state of laminar flow or turbulent flow to the shunt effect of waste gas, let high-temperature waste gas uniform contact heat exchange pipe inner wall, second turbulence block realizes the secondary confluence and mixing of waste gas after shunt, not only significantly reduce waste gas outlet temperature, make it more easily reach design index, and by improving cooling stability, effectively guarantee the operation safety and efficiency of subsequent processing equipment, overall solve the energy efficiency and operation hidden danger problem caused by insufficient gas-solid contact of traditional heat exchange pipe.

Description

Technical Field

[0001] This utility model relates to the field of waste gas cooling technology for ethylene glycol production, specifically a waste gas cooling and receiving device for ethylene glycol production. Background Technology

[0002] Ethylene glycol, as an important chemical raw material, generates high-temperature waste gas containing various organic components and trace impurities during its production process. This waste gas must be cooled before it can be recycled or discharged. The current mainstream cooling method uses heat exchange tube assemblies to achieve gas-liquid heat exchange, and cooling is achieved by the temperature difference between the coolant outside the tube and the waste gas inside the tube.

[0003] However, in practical applications, the exhaust gas often flows in turbulent or laminar flow within the heat exchange tubes. The exhaust gas in the central region of the tube is affected by the velocity distribution, resulting in a limited contact area and short contact time with the inner wall of the heat exchange tube, leading to insufficient heat exchange. This not only reduces the cooling efficiency but also makes it difficult for the exhaust gas outlet temperature to meet the design requirements. Therefore, we need to propose an exhaust gas cooling and receiving device for ethylene glycol production. Utility Model Content

[0004] The purpose of this utility model is to provide a waste gas cooling and receiving device for ethylene glycol production, so as to solve the problem mentioned in the background art that the waste gas in the central area of ​​the tube is affected by the flow velocity distribution, resulting in a limited contact area and short contact time with the inner wall of the heat exchange tube, which leads to insufficient heat exchange, reduced cooling efficiency, and difficulty in achieving the design requirements for the waste gas outlet temperature.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A waste gas cooling and receiving device for ethylene glycol production includes: a cooling box with a first conveying channel and a second conveying channel inside, connected by a through hole; two sets of heat exchange tubes, each set located within the first and second conveying channels, with a connecting pipe connected to the end of the heat exchange tube in the second conveying channel, and a conveying pipe connected to the connecting pipe; the heat exchange tube in the first conveying channel connected to the heat exchange tube in the second conveying channel via the connecting pipe and the conveying pipe; multiple sets of protrusions, all integrally formed on the heat exchange tubes and extending deep into the central region of the heat exchange tubes; and multiple sets of first and second turbulence blocks located inside the heat exchange tubes for mixing the waste gas conveyed within the heat exchange tubes, ensuring uniform contact between the high-temperature waste gas and the inner wall of the heat exchange tubes.

[0006] Preferably, the inner wall of the heat exchange tube is uniformly and fixedly connected with multiple sets of extension blocks for heat exchange, which are used to increase the contact area between the exhaust gas and the heat exchange tube.

[0007] Preferably, the first turbulence block includes a first conical block and a flow divider. The first conical block is fixedly connected to the inner wall of the heat exchange tube. Multiple sets of the diversion grooves are provided, and the multiple sets of diversion grooves are evenly distributed along the side of the first conical block. The protrusion is provided inside the diversion groove, and a conveying channel is left between the protrusion and the diversion groove.

[0008] Preferably, the second turbulence block includes a second conical block and a water collection hole; The second conical block is fixedly connected to the inner wall of the heat exchange tube. The water collection hole is opened at the center of the second conical block. Multiple sets of grooves adapted to the protrusions are opened on the second conical block, and the protrusions are located in the grooves.

[0009] Preferably, the second conveying channel and its internal heat exchange tubes are both inclined.

[0010] Preferably, it also includes a water storage tank for collecting condensate inside the heat exchange tube, the water storage tank being connected to a water delivery pipe, the upper end of the water delivery pipe being connected to a connecting pipe.

[0011] Preferably, the inner wall of the heat exchange tube is provided with a water collection tank, and the upper end of the water delivery pipe is located in the water collection tank.

[0012] Preferably, the end of the heat exchange tube located in the first conveying channel is connected to an air inlet pipe, and the end of the heat exchange tube located in the second conveying channel is connected to an air outlet pipe.

[0013] Compared with the prior art, the beneficial effects of this utility model are: This invention utilizes a design incorporating heat exchange tubes, protrusions, a first turbulence block, and a second turbulence block. By placing protrusions on the heat exchange tubes, extending deep into the central region of the tube, the contact area between the exhaust gas and the tube wall is significantly increased, extending the contact time of the exhaust gas in the tube center. Furthermore, the first turbulence block's diversion effect disrupts the stable laminar or turbulent flow, promoting mixing and ensuring uniform contact between the high-temperature exhaust gas and the inner wall of the heat exchange tube. The second turbulence block facilitates secondary merging and mixing of the diverted exhaust gas, further enhancing the turbulence effect and resulting in a more uniform temperature distribution. This avoids the formation of localized high-temperature points, significantly reducing the exhaust gas outlet temperature and making it easier to meet design specifications. Moreover, by improving cooling stability, it effectively ensures the operational safety and efficiency of subsequent treatment equipment. Overall, this invention solves the problems of low energy efficiency and operational risks caused by insufficient gas-solid contact in traditional heat exchange tubes. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional structural schematic diagram of the cooling box of this utility model; Figure 3 This is a cross-sectional structural schematic diagram of the heat exchange tube of this utility model; Figure 4 This is a schematic diagram of the structure of the first turbulence block and the second turbulence block of this utility model; Figure 5 This is a schematic diagram of the structure of the heat exchange tube, connecting tube, and conveying tube of this utility model; Figure 6 This utility model Figure 3 Enlarged structural diagram of area A in the middle.

[0015] In the diagram: 1. Cooling tank; 2. First conveying channel; 3. Second conveying channel; 4. Liquid inlet pipe; 5. Liquid outlet pipe; 6. Heat exchanger pipe; 61. Extension block; 62. First turbulence block; 621. First conical block; 622. Diverter groove; 63. Second turbulence block; 631. Second conical block; 632. Water collection hole; 7. Protrusion; 8. Connecting pipe; 9. Conveying pipe; 10. Water conveying pipe; 11. Water storage tank; 12. Drain pipe; 13. Drain valve; 14. Air inlet pipe; 15. Air outlet pipe; 16. Water collection trough. Detailed Implementation

[0016] 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.

[0017] Please see Figure 1-6 This utility model provides a technical solution: A waste gas cooling and receiving device for ethylene glycol production includes: a cooling box 1, which has a first conveying channel 2 and a second conveying channel 3 inside, and the first conveying channel 2 and the second conveying channel 3 are connected by a through hole; two sets of heat exchange tubes 6, which are respectively located in the first conveying channel 2 and the second conveying channel 3, and the ends of the heat exchange tubes 6 in the second conveying channel 3 are connected to the connecting pipes 8 and the conveying pipes 9, and the heat exchange tubes 6 in the first conveying channel 2 are connected to the heat exchange tubes 6 in the second conveying channel 3 through the connecting pipes 8 and the conveying pipes 9; multiple sets of protrusions 7, which are integrally formed on the heat exchange tubes 6 and the protrusions 7 penetrate into the central region of the heat exchange tubes 6; and multiple sets of first turbulence blocks 62 and second turbulence blocks 63 are provided inside the heat exchange tubes 6 for mixing the waste gas conveyed in the heat exchange tubes 6, so that the high-temperature waste gas is evenly contacted with the inner wall of the heat exchange tubes 6.

[0018] In an optional embodiment: such as Figure 3 , Figure 5 and Figure 6As shown, multiple sets of extension blocks 61 for heat exchange are uniformly fixedly connected to the inner wall of the heat exchange tube 6 to increase the contact area between the exhaust gas and the heat exchange tube 6.

[0019] It should be noted that by setting the extension block 61, the contact area between the exhaust gas and the heat exchange tube 6 can be increased, the heat exchange time between the exhaust gas and the heat exchange tube 6 can be increased, and the cooling effect of the exhaust gas can be improved.

[0020] In an optional embodiment: such as Figure 3 and Figure 4 As shown, the first turbulence block 62 includes a first conical block 621 and a flow divider 622; The first conical block 621 is fixedly connected to the inner wall of the heat exchange tube 6. Multiple sets of diversion channels 622 are provided. The multiple sets of diversion channels 622 are evenly distributed along the side of the first conical block 621. The protrusion 7 is provided inside the diversion channel 622. A conveying channel is left between the protrusion 7 and the diversion channel 622.

[0021] It should be noted that when the exhaust gas is transported in the heat exchange tube 6, it comes into contact with the first conical block 621. The conical part of the first conical block 621 facilitates the flow of the exhaust gas, making the exhaust gas evenly dispersed. After being dispersed, the exhaust gas passes through the conveying channel after being diverted by the diversion groove 622. When the exhaust gas is diverted by the diversion groove 622, it promotes the mixing of the exhaust gas, allowing the high-temperature exhaust gas to evenly contact the inner wall of the heat exchange tube 6 and the protrusion 7, thereby improving the heat exchange effect of the exhaust gas.

[0022] In an optional embodiment: such as Figure 3 and Figure 4 As shown, the second turbulence block 63 includes a second conical block 631 and a water collection hole 632; The second conical block 631 is fixedly connected to the inner wall of the heat exchange tube 6. The water collection hole 632 is opened at the center of the second conical block 631. Multiple sets of grooves adapted to the protrusions 7 are opened on the second conical block 631. The protrusions 7 are located in the grooves.

[0023] It should be noted that by setting the water collection hole 632, the secondary merging and mixing of the diverted exhaust gas is realized, which further enhances the turbulence effect, makes the temperature distribution more uniform, and avoids the generation of local high temperature points.

[0024] In an optional embodiment: such as Figure 2 As shown, the second conveying channel 3 and its internal heat exchange tube 6 are both set at an inclination.

[0025] It should be noted that the inclined heat exchange tube 6 facilitates the drainage of condensate from the heat exchange tube 6 to the connecting pipe 8, allowing the condensate to enter the water storage tank 11 for collection via the water delivery pipe 10.

[0026] In an optional embodiment: such as Figure 1As shown, it also includes a water storage tank 11 for collecting condensate in the heat exchange tube 6. A water delivery pipe 10 is connected to the water storage tank 11, and the upper end of the water delivery pipe 10 is connected to the connecting pipe 8.

[0027] It should be noted that a drain pipe 12 is connected to the side of the water storage tank 11, and a drain valve 13 is provided on the drain pipe 12. In addition, an observation window for observing the liquid level inside the water storage tank 11 is provided on the side of the water storage tank 11. The liquid level inside the water storage tank 11 can be observed through the observation window. When it is necessary to drain the condensate inside the water storage tank 11, the drain valve 13 is opened to allow the condensate inside the water storage tank 11 to be discharged through the drain pipe 12.

[0028] In an optional embodiment: such as Figure 5 As shown, a water collection tank 16 is provided on the inner wall of the heat exchange tube 6, and the upper end of the water delivery pipe 10 is located in the water collection tank 16.

[0029] It should be noted that by setting up the water collection tank 16, it is convenient to collect the condensate entering the connecting pipe 8 and then transport it to the water delivery pipe 10 and then discharge it from the connecting pipe 8. Additionally, a sealing valve is provided on the water delivery pipe 10 to prevent exhaust gas from the heat exchange tube 6 from being discharged through the water delivery pipe 10, the water storage tank 11, and the drain pipe 12 when the cooling water in the water storage tank 11 is discharged.

[0030] In an optional embodiment: such as Figures 1 to 3 As shown, the end of the heat exchange tube 6 located in the first conveying channel 2 is connected to the air inlet pipe 14, and the end of the heat exchange tube 6 located in the second conveying channel 3 is connected to the air outlet pipe 15.

[0031] It should be noted that the exhaust gas to be cooled is delivered into the heat exchange tube 6 through the inlet pipe 14, and the cooled exhaust gas is discharged through the outlet pipe 15 after being delivered through the heat exchange tube 6. The top of the cooling tank 1 is connected to the liquid inlet pipe 4, and the bottom is connected to the liquid outlet pipe 5. The liquid inlet pipe 4 is connected to the first conveying channel 2, and the liquid outlet pipe 5 is connected to the second conveying channel 3. Cooling water can be conveyed into the first conveying channel 2 through the liquid inlet pipe 4. When the cooling water is conveyed through the first conveying channel 2, the through hole and the second conveying channel 3, it exchanges heat with the heat exchange tube 6. The water after heat exchange can be discharged through the liquid outlet pipe 5.

[0032] The usage process of this utility model is as follows: Cooling water enters the first conveying channel 2 through the liquid inlet pipe 4 and then flows through the first conveying channel 2, the through hole, the second conveying channel 3 and the liquid outlet pipe 5. Exhaust gas enters the heat exchange tube 6 through the air inlet pipe 14 and is then conveyed along the heat exchange tube 6 in the first conveying channel 2 to the conveying pipe 9 and the connecting pipe 8. After entering the heat exchange tube 6 in the second conveying channel 3, it is conveyed through the heat exchange tube 6 and then discharged through the air outlet pipe 15. When the exhaust gas is transported through the heat exchange tube 6, the protrusion 7 and the extension block 61 increase the contact area between the exhaust gas and the inner wall of the heat exchange tube 6, and prolong the contact time of the exhaust gas in the center of the heat exchange tube 6, thereby improving the cooling effect on the exhaust gas. In addition, when the exhaust gas passes through the first turbulence block 62 and the second turbulence block 63, the exhaust gas contacts the first conical block 621 while being transported in the heat exchange tube 6. The conical part of the first conical block 621 facilitates the guidance of the exhaust gas, making the exhaust gas evenly dispersed. After being dispersed, the exhaust gas is diverted by the diversion groove 622 and then passes through the conveyor belt. The waste gas is fed through a distribution channel. When the waste gas is diverted through the diversion channel 622, it promotes mixing and allows the high-temperature waste gas to evenly contact the inner wall of the heat exchange tube 6 and the protrusion 7, thereby improving the heat exchange effect of the waste gas. After the first merging and mixing, the waste gas passes through the second turbulence block 63 and then through the water collection hole 632 to achieve a second merging and mixing of the diverted waste gas, further enhancing the turbulence effect, making the temperature distribution more uniform, and avoiding the generation of local high temperature points. After cooling, the waste gas is transported through the outlet pipe 15 to the next equipment for treatment.

[0033] 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 waste gas cooling and receiving device for ethylene glycol production, characterized in that, include: The cooling box (1) has a first conveying channel (2) and a second conveying channel (3) inside, and the first conveying channel (2) and the second conveying channel (3) are connected by a through hole; The heat exchange tube (6) is provided in two sets. The two sets of heat exchange tubes (6) are respectively located in the first conveying channel (2) and the second conveying channel (3). The end of the heat exchange tube (6) located in the second conveying channel (3) is connected to the connecting pipe (8). The connecting pipe (8) is connected to the conveying pipe (9). The heat exchange tube (6) in the first conveying channel (2) is connected to the heat exchange tube (6) in the second conveying channel (3) through the connecting pipe (8) and the conveying pipe (9). The protrusion (7) is provided in multiple sets, and the multiple sets of protrusion (7) are integrally formed on the heat exchange tube (6), and the protrusion (7) extends into the central area inside the heat exchange tube (6); The first turbulence block (62) and the second turbulence block (63) are provided inside the heat exchange tube (6), and multiple sets of the first turbulence block (62) and the second turbulence block (63) are provided to mix the waste gas transported inside the heat exchange tube (6) so that the high temperature waste gas can be evenly contacted to the inner wall of the heat exchange tube (6).

2. The waste gas cooling and receiving device for ethylene glycol production according to claim 1, characterized in that: The inner wall of the heat exchange tube (6) is uniformly and fixedly connected with multiple sets of extension blocks (61) for heat exchange, which are used to increase the contact area between the exhaust gas and the heat exchange tube (6).

3. The waste gas cooling and receiving device for ethylene glycol production according to claim 1, characterized in that: The first turbulence block (62) includes a first conical block (621) and a flow divider (622); The first conical block (621) is fixedly connected to the inner wall of the heat exchange tube (6). Multiple sets of the diversion groove (622) are provided. The multiple sets of the diversion groove (622) are evenly distributed along the side of the first conical block (621). The protrusion (7) is provided inside the diversion groove (622). A conveying channel is left between the protrusion (7) and the diversion groove (622).

4. The waste gas cooling and receiving device for ethylene glycol production according to claim 1, characterized in that: The second turbulence block (63) includes a second conical block (631) and a water collection hole (632); The second conical block (631) is fixedly connected to the inner wall of the heat exchange tube (6). The water collection hole (632) is opened at the center of the second conical block (631). The second conical block (631) has multiple sets of grooves that are adapted to the protrusions (7). The protrusions (7) are located in the grooves.

5. The waste gas cooling and receiving device for ethylene glycol production according to claim 1, characterized in that: The second conveying channel (3) and its internal heat exchange tube (6) are both inclined.

6. The waste gas cooling and receiving device for ethylene glycol production according to claim 1, characterized in that: It also includes a water storage tank (11) for collecting condensate in the heat exchange tube (6), and a water delivery pipe (10) is connected to the water storage tank (11), the upper end of which is connected to the connecting pipe (8).

7. The waste gas cooling and receiving device for ethylene glycol production according to claim 6, characterized in that: The inner wall of the heat exchange tube (6) is provided with a water collection tank (16), and the upper end of the water delivery pipe (10) is located in the water collection tank (16).

8. The waste gas cooling and receiving device for ethylene glycol production according to claim 1, characterized in that: An air inlet pipe (14) is connected to the end of the heat exchange tube (6) located in the first conveying channel (2), and an air outlet pipe (15) is connected to the end of the heat exchange tube (6) located in the second conveying channel (3).

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