An ethylene oxide stripping process feed temperature precision control assembly

Abstract

This application relates to the field of ethylene oxide preparation technology, and in particular to a precise control component for the feed temperature in an ethylene oxide stripping process. The precise control component for the feed temperature in an ethylene oxide stripping process includes a first detection inlet pipe section, a temperature regulating pipe section, a second detection inlet pipe section, a liquid-to-liquid temperature regulating combination pipe, a first detection outlet pipe section, and a second detection outlet pipe section. The temperature regulating pipe section is connected to the first and second detection inlet pipe sections; the liquid-to-liquid temperature regulating combination pipe is connected to the second detection inlet pipe section and the first detection outlet pipe section; the liquid-to-liquid temperature regulating combination pipe is connected to a liquid-to-liquid temperature balancing device. The precise feed temperature control component in this application can effectively reduce the fluctuation of the feed temperature in the stripping tower, thereby ensuring the yield and quality of the stripping product—ethylene oxide, further optimizing the overall production cost of the preparation process, and enhancing the product's market competitiveness.

Description

Technical Field

[0001] This application relates to the field of ethylene oxide preparation technology, and in particular to a component for precise control of feed temperature in the ethylene oxide stripping process. Background Technology

[0002] In the ethylene oxide / ethylene glycol production unit, the feed gas ethylene, oxygen, and inhibitor EDC are added to the circulating mixed gas at the inlet of reactor R-110. Under high temperature and high pressure conditions, part of the reaction produces ethylene oxide (primary), carbon dioxide (secondary), acetaldehyde (secondary), and formaldehyde (secondary). The ethylene oxide-rich circulating gas after the reaction enters the ethylene oxide absorption section of the scrubbing tower after heat exchange. Here, the ethylene oxide-rich circulating gas comes into countercurrent contact with the lean ethylene oxide circulating water from unit 300#, causing the ethylene oxide to be absorbed. The ethylene oxide-rich circulating water then enters the E-342 (absorption water heat exchanger) after passing through a rich absorption water flash tank. It exchanges heat with the lean circulating water from the bottom of the stripping tower, and then enters the stripping tower to strip the ethylene oxide. The stripping tower is a unit operation used to recover the absorbed solute and separate the absorbent from the solute for regeneration. In actual production, it was found that the feed temperature of the stripping tower fluctuated significantly, leading to large fluctuations in the yield of the final target product, ethylene oxide, and affecting the overall quality stability of the production process. When the feed temperature of the stripping tower was too high, some ethylene oxide would react with water to form ethylene glycol, thus affecting the final yield and quality of ethylene oxide. Summary of the Invention

[0003] To address the aforementioned technical problems, this application provides a component for precise control of feed temperature in the ethylene oxide stripping process.

[0004] The feed temperature precision control component for the ethylene oxide stripping process provided in this application is achieved through the following scheme:

[0005] A precise temperature control component for the feed of an ethylene oxide stripping process includes a first detection inlet pipe section, a temperature regulating pipe section, a second detection inlet pipe section, a liquid-feed temperature regulating combination pipe, a first detection outlet pipe section, and a second detection outlet pipe section. The temperature regulating pipe section is connected to the first and second detection inlet pipe sections. The liquid-feed temperature regulating combination pipe is connected to the second detection inlet pipe section and the first detection outlet pipe section. The liquid-feed temperature regulating combination pipe is connected to a liquid-feed temperature balancing device. One end of the liquid-feed temperature balancing device is connected to the temperature regulating pipe section, and the other end is connected between the first and second detection outlet pipe sections. One end of the first detection inlet pipe section is connected to a pipeline carrying ethylene oxide-rich circulating water that has absorbed ethylene oxide after heat exchange in an absorption water heat exchanger, and the other end is connected to the temperature regulating pipe section. The second detection outlet pipe section is connected to the feed pipe of the stripping tower.

[0006] The feed temperature control component in this application can effectively reduce the fluctuation of feed temperature in the stripping tower, thereby ensuring the yield and quality of the stripping product - ethylene oxide, further optimizing the overall production cost of the preparation process, and enhancing the market competitiveness of the product.

[0007] Preferably, the temperature balancing device includes a feed pipe assembly, a storage tank, and a discharge pipe assembly. One end of the feed pipe assembly is connected between the first detection discharge pipe section and the second detection discharge pipe section, and the other end is connected to the top of the storage tank. One end of the discharge pipe assembly is connected to the bottom of the storage tank, and the other end is connected to the temperature regulating pipe section.

[0008] Preferably, the feed pipe assembly includes a feed pipe, which is sequentially connected to a first solenoid valve and a first centrifugal pump along the material flow direction; a first temperature detector is installed on the first solenoid valve; the discharge pipe assembly includes a discharge pipe, which is sequentially connected to a second solenoid valve, a second centrifugal pump, and a third solenoid valve along the material flow direction; the third solenoid valve is connected between the second centrifugal pump and the temperature regulating pipe section; a second temperature detector is installed on the third solenoid valve; the first temperature detector displays the temperature T1 when the material is input into the liquid material temperature balancing device; the second temperature detector displays the temperature T2 when the material is output from the liquid material temperature balancing device; the difference between temperature T1 and temperature T2 is the heat loss value ΔT of the liquid material temperature balancing device, and the temperature of the liquid material flowing through the first detection discharge pipe section can be controlled and adjusted by the heat loss value ΔT to avoid the feed temperature being too high and affecting the yield and quality of ethylene oxide.

[0009] By adopting the above technical solution, the temperature control accuracy of the liquid material entering the stripping tower feed pipe can be effectively improved.

[0010] Preferably, the temperature balancing device further includes a heat balancer, which is disposed inside the storage tank and is used to perform thermal balancing on the liquid stored in the storage tank, thereby controlling the temperature T when the material is output from the liquid temperature balancing device. The significance of controlling the temperature T when the material is output from the liquid temperature balancing device is to adjust the temperature of the liquid input to the liquid temperature regulating assembly, thereby improving the temperature control accuracy of the liquid temperature regulating assembly.

[0011] By adopting the above technical solutions, the accuracy of feed temperature control in the stripping tower can be effectively improved, thereby ensuring the yield and quality of the stripping product - ethylene oxide, optimizing the overall production cost of the preparation process, and enhancing the market competitiveness of the product.

[0012] Preferably, the temperature control pipe section includes a temperature control tank, which is equipped with a mechanical stirrer; the first detection inlet pipe section is connected to the bottom of the temperature control tank; the discharge pipe is connected to the bottom of the side wall of the temperature control tank; and the second detection inlet pipe section is connected to the upper part of the side wall of the temperature control tank.

[0013] By adopting the above technical solution, it is beneficial to reduce the ideal temperature T of the material and liquid entering the stripping tower feed temperature pipe after being controlled by the feed temperature precision control component of this application. 标 The difference helps improve the overall precision of regulation.

[0014] Preferably, the liquid temperature regulating assembly includes a first adapter pipe and a second adapter pipe, wherein the first adapter pipe and the second adapter pipe are a one-to-three adapter pipe; the three adapters between the first adapter pipe and the second adapter pipe are respectively connected to a temperature regulating unit pipe A, a temperature regulating unit pipe B, and a temperature regulating unit pipe C for adjusting the liquid temperature.

[0015] By adopting the above technical solution, it is beneficial to reduce the ideal temperature T of the material and liquid entering the stripping tower feed temperature pipe after being controlled by the feed temperature precision control component of this application. 标 The difference helps improve the overall precision of regulation.

[0016] Preferably, a third temperature detector is installed on the first detection inlet pipe section; the third temperature detector displays the temperature of the liquid material entering the first detection inlet pipe section after the ethylene oxide-rich circulating water has absorbed heat through the absorption water heat exchanger; a fourth temperature detector is installed on the second detection inlet pipe section; the fourth temperature detector displays the temperature of the liquid material after temperature adjustment by the temperature-adjusting pipe section; a fifth temperature detector is installed on the first detection outlet pipe section; the fifth temperature detector displays the temperature of the liquid material entering the first detection outlet pipe section after temperature control by the liquid material temperature-adjusting combination pipe fitting; a sixth temperature detector is installed on the second detection outlet pipe section; the sixth temperature detector displays the temperature of the liquid material entering the feed pipe of the stripping tower.

[0017] Preferably, a fourth solenoid valve is connected to each end of the temperature control unit tube A; a fifth solenoid valve is connected to each end of the temperature control unit tube B; a sixth solenoid valve is connected to each end of the temperature control unit tube C; and the ideal temperature of the liquid entering the feed pipe of the stripping tower is calibrated as T. 标 When the fourth temperature sensor displays a temperature similar to T 标 If the temperature difference is within ±0.1℃, the fourth and sixth solenoid valves will close, while the fifth and third solenoid valves will open. The liquid material, after being insulated by the temperature control unit tube B, will be fed into the feed pipe of the stripping tower. When the fourth temperature detector displays a temperature greater than T... 标 Furthermore, the fourth temperature detector showed a temperature higher than T. 标 If the temperature is greater than 0.1℃, the fifth and sixth solenoid valves will close, and the fourth solenoid valve will open. After temperature adjustment by the temperature control unit tube A, if the temperature displayed by the fifth temperature sensor is consistent with T... 标If the temperature difference is within ±0.1℃, the third solenoid valve will open the feed pipe into the stripping tower. If the fifth temperature sensor still shows a temperature greater than T... 标 Furthermore, the fifth temperature detector showed a temperature higher than T. 标 If the temperature exceeds 0.1℃, the third solenoid valve is closed, and the first solenoid valve and the first centrifugal pump are activated, transporting the liquid to the storage tank; the fourth temperature detector displays a temperature ratio T. 标 If the temperature is below 0.1℃, the fourth and fifth solenoid valves close, and the sixth solenoid valve opens. After temperature adjustment by the temperature control unit tube C, the fifth temperature detector displays the temperature and T. 标 If the temperature difference is within ±0.1℃, the third solenoid valve will open the feed pipe into the stripping tower. If the fifth temperature sensor displays a temperature difference of T... 标 If the temperature exceeds 0.1℃, the third solenoid valve is closed, and the first solenoid valve and the first centrifugal pump are opened, transporting the liquid to the storage tank. The material stored in the storage tank will eventually be fed into the temperature control tank and mixed with the ethylene oxide-rich circulating water that has absorbed heat through the absorption water heat exchanger. The temperature of the liquid in the second detection inlet pipe section is then adjusted. The temperature ratio of the circulating heat exchange medium in the heat balancer to T is... 标 The temperature of the liquid material entering the temperature control tank is controlled by adjusting the flow rate of the circulating heat exchange medium in the heat balancer, which is 4-6℃ lower than the temperature of the heat balancer.

[0018] By adopting the above technical solutions, the accuracy of feed temperature control in the stripping tower can be effectively improved, thereby ensuring the yield and quality of the stripping product - ethylene oxide, optimizing the overall production cost of the preparation process, and enhancing the market competitiveness of the product.

[0019] Preferably, the temperature regulating unit tube A, temperature regulating unit tube B, and temperature regulating unit tube C have the same structure; taking temperature regulating unit tube A as an example, temperature regulating unit tube A includes a temperature regulating tube body, and the temperature regulating tube body is integrally formed with a jacket layer; a heat exchange medium is circulated in the jacket layer; a heat insulation coating is sprayed onto the outer wall of the temperature regulating tube body; a heat insulation cotton layer is spirally wrapped around the outer wall of the temperature regulating tube body using flexible mica tape; the heat insulation cotton layer is in contact with the heat insulation coating; a protective sleeve is detachably connected to the temperature regulating tube body; the heat insulation cotton layer is disposed between the protective sleeve and the temperature regulating tube body; the temperature of the heat exchange medium circulated in the jacket layer of temperature regulating unit tube A is equal to T. 标 -0.4~T 标 -0.2℃; the temperature of the heat exchange medium circulating in the jacket layer of the temperature regulating unit tube B is equal to T. 标 +0.1~T 标 +0.2℃; the temperature of the heat exchange medium circulating in the jacket layer of the temperature regulating unit tube C is equal to T. 标 +0.2~T 标 +0.4℃.

[0020] By adopting the above technical solutions, the accuracy of feed temperature control in the stripping tower can be effectively improved, thereby ensuring the yield and quality of the stripping product - ethylene oxide, optimizing the overall production cost of the preparation process, and enhancing the market competitiveness of the product.

[0021] In summary, this application has the following advantages:

[0022] 1. The feed temperature control component in this application can effectively reduce the fluctuation of feed temperature in the stripping tower, thereby ensuring the yield and quality of the stripping product - ethylene oxide, optimizing the overall production cost of the preparation process, and enhancing the market competitiveness of the product.

[0023] 2. The feed temperature precision control component in this application is easy to install and disassemble, and is easy to maintain and service regularly. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 in this application.

[0025] Figure 2 This is a schematic diagram of the thermal balancer in Embodiment 1 of this application.

[0026] Figure 3 This is a schematic diagram of the temperature control unit tube A in Embodiment 1 of this application.

[0027] In the diagram, 1. First detection inlet pipe section; 11. Third temperature detector; 2. Temperature control pipe section; 21. Temperature control tank; 22. Mechanical stirrer; 3. Second detection inlet pipe section; 31. Fourth temperature detector; 4. Liquid temperature control combination pipe fitting; 41. First adapter pipe; 42. Second adapter pipe; 43. Temperature control unit pipe A; 430. Temperature control pipe body; 431. Fourth solenoid valve; 432. Jacket layer; 433. Thermal insulation coating; 434. Thermal insulation layer; 435. Protective sleeve; 44. Temperature control unit pipe B; 441. Fifth solenoid valve; 45. Temperature control unit pipe C; 451. Sixth solenoid valve; 5. First detection outlet pipe section. 51. Fifth temperature detector; 6. Second liquid outlet pipe section; 61. Sixth temperature detector; 7. Liquid temperature balancing device; 71. Feed pipe assembly; 711. Feed pipe; 712. First solenoid valve; 713. First centrifugal pump; 714. First temperature detector; 72. Storage tank; 73. Discharge pipe assembly; 731. Discharge pipe; 732. Second solenoid valve; 733. Second centrifugal pump; 734. Third solenoid valve; 735. Second temperature detector; 74. Thermal balancer; 741. Heat exchange medium storage tank; 742. First extraction pump; 743. Second extraction pump; 744. U-shaped heat exchange tube; 745. Heat dissipation fins. Implementation

[0028] To further understand the inventiveness of this application, the technical description of this application is provided below in conjunction with embodiments and comparative examples. Example

[0029] refer to Figure 1 A precise temperature control component for the feed of an ethylene oxide stripping process includes a first detection inlet pipe section 1, a temperature regulating pipe section 2, a second detection inlet pipe section 3, a liquid-material temperature regulating combination pipe 4, a first detection outlet pipe section 5, a second detection outlet pipe section 6, and a liquid-material temperature balancing device 7. The inlet end of the temperature regulating pipe section 2 is connected to the first detection inlet pipe section 1, and the outlet end of the temperature regulating pipe section 2 is connected to the second detection inlet pipe section 3. The inlet end of the temperature regulating pipe section 2 is connected to the liquid-material temperature balancing device 7. The inlet end of the liquid-material temperature regulating combination pipe 4 is connected to the second detection inlet pipe section 3, and the outlet end of the liquid-material temperature regulating combination pipe 4 is connected to the first detection outlet pipe section 5. One end of the liquid-material temperature balancing device 7 is fixedly connected to the inlet end of the temperature regulating pipe section 2 via a flange, and the other end of the liquid-material temperature balancing device 7 is connected to a tee connector connecting the first detection outlet pipe section 5 and the second detection outlet pipe section 6. One end of the first detection inlet pipe section 1 is connected to the circulating water pipeline that has absorbed ethylene oxide after heat exchange in the absorption water heat exchanger, and the other end of the first detection inlet pipe section 1 is fixedly connected to the feed end of the temperature control pipe section 2 via a flange. The second detection outlet pipe section 6 is connected to the feed pipeline of the stripping tower.

[0030] refer to Figure 1 A third temperature sensor 11 is installed on the first detection inlet pipe section 1. The third temperature sensor 11 displays the temperature of the ethylene oxide-rich circulating water entering the first detection inlet pipe section 1 after heat exchange in the absorption water heat exchanger. A fourth temperature sensor 31 is installed on the second detection inlet pipe section 3. The fourth temperature sensor 31 displays the temperature of the liquid after temperature adjustment by the temperature-adjusting pipe section 2. A fifth temperature sensor 51 is installed on the first detection outlet pipe section 5. The fifth temperature sensor 51 displays the temperature of the liquid entering the first detection outlet pipe section 5 after temperature control by the liquid temperature-adjusting assembly pipe 4. A sixth temperature sensor 61 is installed on the second detection outlet pipe section 6. The sixth temperature sensor 61 displays the temperature of the liquid entering the feed pipe of the stripping tower.

[0031] refer to Figure 1 The temperature balancing device 7 includes an inlet pipe assembly 71, a storage tank 72, and an outlet pipe assembly 73. One end of the inlet pipe assembly 71 is fixedly connected via a flange to a tee connector between the first detection outlet pipe section 5 and the second detection outlet pipe section 6, and the other end of the inlet pipe assembly 71 is fixedly connected via a flange to the top of the storage tank 72. One end of the outlet pipe assembly 73 is fixedly connected via a flange to the bottom of the storage tank 72, and the other end of the outlet pipe assembly 73 is fixedly connected via a flange to the temperature regulating pipe section 2.

[0032] refer to Figure 1 The temperature-regulating pipe section 2 includes a temperature-regulating tank 21. A mechanical stirrer 22 is coaxially mounted on the top of the temperature-regulating tank 21. The mechanical stirrer 22 can quickly mix the liquid input from the first detection inlet pipe section 1 and the liquid input from the liquid temperature balancing device 7, thereby ensuring the temperature stability of the liquid input to the second detection inlet pipe section 3. The first detection inlet pipe section 1 is fixedly connected to the bottom of the temperature-regulating tank 21 via a flange. The discharge pipe 731 of the liquid temperature balancing device 7 is fixedly connected to the bottom of the side wall of the temperature-regulating tank 21 via a flange. The second detection inlet pipe section 3 is fixedly connected to the upper part of the side wall of the temperature-regulating tank 21 via a flange.

[0033] refer to Figure 1 The feed pipe assembly 71 includes a feed pipe 711, a first solenoid valve 712, a first centrifugal pump 713, and a first temperature detector 714. The feed pipe 711 is sequentially connected to the first solenoid valve 712 and the first centrifugal pump 713 along the material flow direction. The first temperature detector 714 is installed on the first solenoid valve 712 to detect the liquid temperature T1 of the input liquid temperature balancing device 7.

[0034] refer to Figure 1 The discharge pipe assembly 73 includes a discharge pipe 731, a second solenoid valve 732, a second centrifugal pump 733, a third solenoid valve 734, and a second temperature sensor 735. The discharge pipe 731 is sequentially connected to the second solenoid valve 732, the second centrifugal pump 733, and the third solenoid valve 734 along the material flow direction. The third solenoid valve 734 is located near the temperature regulating tank 21 and is fixedly connected to the second centrifugal pump 733 and the temperature regulating pipe section 2 via a flange. The second temperature sensor 735 is installed on the third solenoid valve 734 to detect the temperature T2 of the liquid entering the temperature regulating tank 21 from the output liquid temperature balancing device 7.

[0035] refer to Figure 1 and Figure 2The temperature difference between T1 and T2 is the heat loss value ΔT of the liquid material temperature balancing device 7. The heat loss value ΔT allows for temperature control of the liquid material flowing through the first detection outlet pipe section 5, preventing excessively high feed temperatures from affecting the ethylene oxide yield and quality, optimizing the overall production cost of the preparation process, and enhancing the product's market competitiveness. To better control the liquid material temperature T2 entering the temperature regulating tank 21 from the output liquid material temperature balancing device 7, the temperature balancing device 7 also includes a heat balancer 74. The heat balancer 74 is fixedly connected inside the storage tank 72 and is used to perform heat balancing on the liquid material stored in the storage tank 72, thereby controlling the temperature T2 when the material is output from the liquid material temperature balancing device 7, and thus improving the temperature control accuracy of the liquid material temperature regulating assembly pipe 4. The heat balancer 74 includes a heat exchange medium storage tank 741, a first extraction pump 742, a second extraction pump 743, a U-shaped heat exchange tube 744, and heat dissipation fins 745. The heat exchange medium storage tank 741 is fixedly placed on the upper surface of the storage tank 72. The first extraction pump 742 is fixedly connected at one end to the outlet of the heat exchange medium storage tank 741 via a pipe, and at the other end to the inlet of the U-shaped heat exchange tube 744. The second extraction pump 743 is fixedly connected at one end to the return end of the heat exchange medium storage tank 741 via a pipe, and at the other end to the outlet of the U-shaped heat exchange tube 744. The heat dissipation fins 745 are welded to the outer wall of the U-shaped heat exchange tube 744 at intervals.

[0036] refer to Figure 2 The liquid temperature-regulating assembly pipe fitting 4 includes a first adapter pipe 41, a second adapter pipe 42, a temperature-regulating unit pipe A43, a temperature-regulating unit pipe B44, and a temperature-regulating unit pipe C45. Specifically, the first adapter pipe 41 and the second adapter pipe 42 are three-connector pipes, with the three connectors between them respectively connected to the temperature-regulating unit pipes A43, B44, and C45 for adjusting the liquid temperature. Both ends of the temperature-regulating unit pipe A43 are fixedly connected to a fourth solenoid valve 431 via flanges. Both ends of the temperature-regulating unit pipe B44 are fixedly connected to a fifth solenoid valve 441 via flanges, and both ends of the temperature-regulating unit pipe C45 are fixedly connected to a sixth solenoid valve 451 via flanges.

[0037] refer to Figure 1 and Figure 3Temperature-regulating unit tubes A43, B44, and C45 have the same structure. Taking temperature-regulating unit tube A43 as an example, it includes a temperature-regulating tube body 430, which has an integrally formed jacket layer 432. A heat exchange medium circulates within the jacket layer 432, and the temperature of the heat exchange medium varies in different temperature-regulating unit tubes. The outer wall of the temperature-regulating tube body 430 is sprayed with a heat-insulating coating, which is then cured to form a heat-insulating coating 433. The outer wall of the temperature-regulating tube body 430 is covered with a flexible mica tape spirally wound around an insulation cotton layer 434, which is in contact with the heat-insulating coating 433. A protective sleeve 435 is detachably and fixedly connected to the temperature-regulating tube body 430; that is, the protective sleeve 435 covers the outer wall of the insulation cotton layer 434, and the insulation cotton layer 434 fills the space between the protective sleeve 435 and the temperature-regulating tube body 430. The protective sleeve 435 is composed of two half-tubes that are detachably and securely connected by fasteners.

[0038] The temperature of the heat exchange medium circulating in the jacket layer 432 of the temperature control unit tube A43 is equal to T. 标 -0.4~T 标 -0.2℃. Preferably, the temperature of the heat exchange medium circulating in the jacket layer 432 of the temperature control unit tube A43 is equal to T. 标 -0.4℃.

[0039] The temperature of the heat exchange medium circulating in the jacket layer 432 of the temperature control unit tube B44 is equal to T. 标 +0.1~T 标 +0.2℃. Preferably, the temperature of the heat exchange medium circulating in the jacket layer 432 of the temperature control unit tube B44 is equal to T. 标 +0.1℃.

[0040] The temperature of the heat exchange medium circulating inside the jacket layer 432 of the temperature control unit tube C45 is equal to T. 标 +0.2~T 标 +0.4℃. Preferably, the temperature of the heat exchange medium circulating in the jacket layer 432 of the temperature control unit tube B44 is equal to T. 标 +0.4℃.

[0041] refer to Figure 2 Temperature control unit tube A43 is fixedly connected to a fourth solenoid valve 431 at both ends via flanges. Temperature control unit tube B44 is fixedly connected to a fifth solenoid valve 441 at both ends via flanges. Temperature control unit tube C45 is fixedly connected to a sixth solenoid valve 451 at both ends via flanges.

[0042] The ideal temperature for liquid entering the feed pipe of the stripping tower is calibrated as T. 标 .

[0043] When the fourth temperature sensor 31 displays the temperature and T 标If the difference is within ±0.1℃, the fourth solenoid valve 431 and the sixth solenoid valve 451 will be closed, and the fifth solenoid valve 441 and the third solenoid valve 734 will be opened. The liquid material will be fed into the feed pipe of the stripping tower after being insulated by the temperature control unit pipe B44.

[0044] When the fourth temperature sensor 31 displays a temperature greater than T 标 Furthermore, the fourth temperature detector 31 displays a temperature ratio T. 标 If the temperature is greater than 0.1℃, the fifth solenoid valve 441 and the sixth solenoid valve 451 will close, and the fourth solenoid valve 431 will open. After temperature adjustment by the temperature control unit tube A43, if the temperature displayed by the fifth temperature detector 51 is consistent with T... 标 If the temperature difference is within ±0.1℃, the third solenoid valve 734 will open the feed pipe into the stripping tower. If the fifth temperature sensor 51 still shows a temperature greater than T... 标 Furthermore, the fifth temperature detector 51 displays a temperature ratio T. 标 If the temperature is above 0.1℃, the third solenoid valve 734 is closed, the first solenoid valve 712 and the first centrifugal pump 713 are opened, and the liquid is transported to the storage tank 72. The temperature of the liquid entering the temperature regulating tank 21 is controlled by the thermal balancer 74.

[0045] When the fourth temperature detector 31 displays a temperature ratio T 标 If the temperature is below 0.1℃, the fourth solenoid valve 431 and the fifth solenoid valve 441 will close, and the sixth solenoid valve 451 will open. After temperature adjustment by the temperature control unit tube C45, the fifth temperature detector 51 will display the temperature and T. 标 If the temperature difference is within ±0.1℃, the third solenoid valve 734 will open the feed pipe into the stripping tower. If the fifth temperature detector 51 displays a temperature difference T... 标 The temperature is 0.1℃ or higher, or the temperature displayed by the fifth temperature detector (51) is higher than T. 标 If the temperature is more than 0.1℃ lower, the third solenoid valve 734 will be closed, and the first solenoid valve 712 and the first centrifugal pump 713 will be opened. The liquid will be transported to the storage tank 72, and the temperature of the liquid entering the temperature regulating tank 21 will be controlled by the thermal balancer 74.

[0046] refer to Figure 1 The material stored in storage tank 72, after being thermally balanced by heat balancer 74, is finally input into temperature-controlled tank 21. The liquid temperature is constant. The output liquid is mixed and blended with the ethylene oxide-rich circulating water that has absorbed heat through the absorption water heat exchanger before being input into the second detection inlet pipe section 3. It should be noted that the temperature of the circulating heat exchange medium inside heat balancer 74 is higher than T. 标The actual temperature needs to be adjusted in a timely manner based on the temperature information displayed by the first temperature detector 714. The temperature of the circulating heat exchange medium is controlled by controlling the flow rate of the circulating heat exchange medium in the heat balancer 74 and controlling the liquid temperature T2 input to the temperature control tank 21 through the temperature balancing device 7.

[0047] In summary, the feed temperature control component in this application can effectively reduce the fluctuation of feed temperature in the stripping tower, thereby ensuring the yield and quality of the stripping product - ethylene oxide, optimizing the overall production cost of the preparation process, and enhancing the product's market competitiveness.

[0048] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A precise temperature control component for the feed in an ethylene oxide stripping process, characterized in that: The system includes a first detection inlet pipe section (1), a temperature regulating pipe section (2), a second detection inlet pipe section (3), a liquid temperature regulating assembly pipe section (4), a first detection outlet pipe section (5), and a second detection outlet pipe section (6). The temperature regulating pipe section (2) is connected to the first detection inlet pipe section (1) and the second detection inlet pipe section (3). The liquid temperature regulating assembly pipe section (4) is connected to the second detection inlet pipe section (3) and the first detection outlet pipe section (5). The liquid temperature regulating assembly pipe section (4) is connected to a liquid temperature balancing device (7). One end of the liquid temperature balancing device (7) is connected to the temperature regulating pipe section (2), and the other end is connected to the first detection outlet pipe section (5). The first detection inlet pipe section (1) is connected to the first detection outlet pipe section (5) and the second detection outlet pipe section (6) at one end and to the temperature regulating pipe section (2) at the other end. The second detection outlet pipe section (6) is connected to the feed pipe of the stripping tower. The temperature balancing device (7) includes a feed pipe group (71), a storage tank (72), and a discharge pipe group (73). One end of the feed pipe group (71) is connected between the first detection outlet pipe section (5) and the second detection outlet pipe section (6) and the other end is connected to the top of the storage tank (72). One end of the discharge pipe group (73) is connected to the top of the storage tank (72). The bottom of the storage tank (72) and the other end are connected to the temperature control pipe section (2); the feed pipe group (71) includes a feed pipe (711), which is connected in sequence to a first solenoid valve (712) and a first centrifugal pump (713) along the material flow direction; a first temperature detector (714) is installed on the first solenoid valve (712); the discharge pipe group (73) includes a discharge pipe (731), which is connected in sequence to a second solenoid valve (732), a second centrifugal pump (733), and a third solenoid valve (734) along the material flow direction; the third solenoid valve (734) is connected to the second centrifugal pump. Between the pump (733) and the temperature regulating pipe section (2); a second temperature detector (735) is installed on the third solenoid valve (734); the first temperature detector (714) displays the temperature T1 when the material is input into the liquid material temperature balancing device (7); the second temperature detector (735) displays the temperature T2 when the material is output from the liquid material temperature balancing device (7); the difference between the temperature T1 and the temperature T2 is the heat loss value △T of the liquid material temperature balancing device (7). The temperature of the liquid flowing through the first detection outlet pipe section (5) can be controlled and adjusted by the heat loss value △T to avoid the feed temperature being too high and affecting the yield and quality of ethylene oxide;The temperature balancing device (7) also includes a heat balancer (74), which is located inside the storage tank (72) and is used to perform heat balancing on the liquid stored in the storage tank (72), thereby controlling the temperature T2 when the material is output from the liquid temperature balancing device (7). The significance of controlling the temperature T2 when the material is output from the liquid temperature balancing device (7) is to adjust the temperature of the liquid entering the liquid temperature regulating assembly (4), thereby improving the temperature control accuracy of the liquid temperature regulating assembly (4).

2. The feed temperature precision control component for the ethylene oxide stripping process according to claim 1, characterized in that: The temperature control pipe section (2) includes a temperature control tank (21), which is equipped with a mechanical stirrer (22); the first detection inlet pipe section (1) is connected to the bottom of the temperature control tank (21); the discharge pipe (731) is connected to the bottom of the side wall of the temperature control tank (21); and the second detection inlet pipe section (3) is connected to the upper part of the side wall of the temperature control tank (21).

3. The feed temperature precision control component for the ethylene oxide stripping process according to claim 1, characterized in that: The liquid temperature control assembly (4) includes a first adapter pipe (41) and a second adapter pipe (42). The first adapter pipe (41) and the second adapter pipe (42) are a one-to-three adapter pipe. The three adapters between the first adapter pipe (41) and the second adapter pipe (42) are respectively connected to temperature control unit pipe A (43), temperature control unit pipe B (44), and temperature control unit pipe C (45) for adjusting the liquid temperature.

4. The feed temperature precision control component for the ethylene oxide stripping process according to claim 3, characterized in that: A third temperature detector (11) is installed on the first detection inlet pipe section (1); the third temperature detector (11) displays the temperature of the liquid material entering the first detection inlet pipe section (1) after the ethylene oxide-rich circulating water has absorbed heat through the absorption water heat exchanger; a fourth temperature detector (31) is installed on the second detection inlet pipe section (3); the fourth temperature detector (31) displays the temperature of the liquid material after temperature adjustment by the temperature adjustment pipe section (2); a fifth temperature detector (51) is installed on the first detection outlet pipe section (5); the fifth temperature detector (51) displays the temperature of the liquid material entering the first detection outlet pipe section (5) after temperature control by the liquid material temperature adjustment combination pipe fitting (4); a sixth temperature detector (61) is installed on the second detection outlet pipe section (6); the sixth temperature detector (61) displays the temperature of the liquid material entering the feed pipe of the stripping tower.

5. The feed temperature precision control component for the ethylene oxide stripping process according to claim 4, characterized in that: The temperature control unit tube A (43) is connected to a fourth solenoid valve (431) at both ends; the temperature control unit tube B (44) is connected to a fifth solenoid valve (441) at both ends; the temperature control unit tube C (45) is connected to a sixth solenoid valve (451) at both ends; the ideal temperature of the liquid entering the feed pipe of the stripping tower is calibrated as T. 标 When the fourth temperature detector (31) displays the temperature and T 标 If the difference is within ±0.1℃, the fourth solenoid valve (431) and the sixth solenoid valve (451) will be closed, and the fifth solenoid valve (441) and the third solenoid valve (734) will be opened. The liquid material will be fed into the feed pipe of the stripping tower after being kept warm by the temperature regulating unit pipe B (44). When the fourth temperature detector (31) displays a temperature greater than T 标 And the fourth temperature detector (31) shows a temperature higher than T. 标 If the temperature is greater than 0.1℃, the fifth solenoid valve (441) and the sixth solenoid valve (451) will close, and the fourth solenoid valve (431) will open. After temperature adjustment by the temperature control unit tube A (43), if the temperature displayed by the fifth temperature detector (51) is greater than T, the temperature will be adjusted accordingly. 标 If the difference is within ±0.1℃, the third solenoid valve (734) will open the feed pipe into the stripping tower. If the fifth temperature detector (51) still shows a temperature greater than T... 标 Furthermore, the fifth temperature detector (51) displays a temperature ratio T. 标 If the temperature exceeds 0.1℃, the third solenoid valve (734) is closed, and the first solenoid valve (712) and the first centrifugal pump (713) are opened, and the liquid is transported to the storage tank (72); the fourth temperature detector (31) displays the temperature ratio T. 标 If the temperature is below 0.1℃, the fourth solenoid valve (431) and the fifth solenoid valve (441) will close, and the sixth solenoid valve (451) will open. After temperature adjustment by the temperature control unit tube C (45), the fifth temperature detector (51) will display the temperature and T. 标 If the difference is within ±0.1℃, the third solenoid valve (734) opens the feed pipe into the stripping tower. If the fifth temperature detector (51) displays a temperature ratio T... 标 If the temperature exceeds 0.1℃, the third solenoid valve (734) is closed, and the first solenoid valve (712) and the first centrifugal pump (713) are opened, and the liquid is transported to the storage tank (72). The material stored in the storage tank (72) will eventually be input into the temperature regulating tank (21) and mixed with the ethylene oxide-rich circulating water that has absorbed heat after heat exchange in the absorption water heat exchanger. The temperature of the liquid is then input into the second detection inlet pipe section (3). The temperature ratio of the circulating heat exchange medium in the heat balancer (74) to T 标 The temperature of the liquid material T2 entering the temperature regulating tank (21) is controlled by controlling the flow rate of the circulating heat exchange medium in the heat balancer (74) at a lower temperature of 4-6℃.

6. The feed temperature precision control component for the ethylene oxide stripping process according to claim 5, characterized in that: The temperature regulating unit tubes A (43), B (44), and C (45) have the same structure; taking the temperature regulating unit tube A (43) as an example, the temperature regulating unit tube A (43) includes a temperature regulating tube body (430), and the temperature regulating tube body (430) is integrally formed with a jacket layer (432); a heat exchange medium is circulated in the jacket layer (432); a heat insulation coating (433) is sprayed on the outer wall of the temperature regulating tube body (430); the temperature regulating unit tube A (430) is formed by the temperature regulating unit tube A (430) and the temperature regulating unit tube B (44) is formed by the temperature regulating unit tube B (45) and the temperature regulating unit tube C (45) is formed by the temperature regulating unit tube A (430) and the temperature regulating unit tube B (430) is formed by the temperature regulating unit tube A (430) and the temperature regulating unit tube B (430) is formed by the temperature regulating unit tube A (430) and the temperature regulating unit tube B (430) is formed by the temperature regulating unit tube A (430) and the temperature regulating unit tube C (45) is formed by the temperature regulating unit tube A (430) and the temperature regulating unit tube B (4 ... The outer wall of the tube body (430) is covered with a flexible mica tape spirally wound with a heat insulation cotton layer (434); the heat insulation cotton layer (434) is in contact with the heat insulation coating (433); the temperature regulating tube body (430) is detachably connected to a protective sleeve (435); the heat insulation cotton layer (434) is disposed between the protective sleeve (435) and the temperature regulating tube body (430); the temperature of the heat exchange medium circulating in the jacket layer (432) of the temperature regulating unit tube A (43) is equal to T. 标 -0.4~T 标 -0.2℃; the temperature of the heat exchange medium circulating in the jacket layer (432) of the temperature regulating unit tube B (44) is equal to T. 标 +0.1~T 标 +0.2℃; the temperature of the heat exchange medium circulating in the jacket layer (432) of the temperature regulating unit tube C (45) is equal to T. 标 +0.2~T 标 +0.4℃.

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