Backflow separation tower for petrochemical engineering

Abstract

The utility model relates to the technical field of petrochemical production equipment, in particular to a reflux separation tower for petrochemical engineering, which comprises a placing box body, a connecting pipe, an end cover, a partition plate A, a middle partition plate, a partition plate B, a heating device, a gas guide pipe, a cooling water pipe A, a cooling water pipe B, a gas return pipe, a cooling module, a flow guide branch pipe, a valve, a discharge pipe and a control switch, the connecting pipe is fixedly connected to the middle position of the upper end of the placing box body, the partition plate A is fixedly connected to the inner wall, close to the lower end, of the connecting pipe, the middle partition plate is fixedly connected to the inner wall, close to the lower middle position, of the connecting pipe, and the partition plate B is fixedly connected to the inner wall, close to the upper end, of the connecting pipe; the heating device is fixedly connected to the bottom of the interior of the placement box body. The device has the effects that the operation flexibility is high, separated components are convenient to control, the equipment debugging time is short, and the separation effect is good.

Description

Technical Field

[0001] This application relates to the technical field of petrochemical production equipment, and in particular to a reflux separation tower for petrochemical engineering. Background Art

[0002] In the petrochemical production process, various fractionation methods such as distillation and dry distillation are required to separate certain heavy substances. The extraction waste liquid or other combined liquids produced during production will also contain a certain amount of target components. The existing distillation equipment is large in volume, and continuous liquid supply is required for each production or fractionation. Moreover, the time required to adjust the fractionation temperature is relatively long, which does not meet the flexible requirements for temporarily fractionating a certain product. Therefore, to solve this problem, various forms of reflux separation tower structures have been set up, which can meet the needs of fractionating a certain substance to some extent. However, in the adopted cooling form, most of the condensed water is introduced into the volatile gas in a coiled manner through a pipeline to generate condensate beads. During the separation and collection process, there are more impurities, and multiple devices are required to operate in batches. Therefore, it is necessary to improve the existing reflux fractionation structure to solve these problems. Summary of the Invention

[0003] Aiming at the deficiencies existing in the prior art, the purpose of this application is to provide a reflux separation tower for petrochemical engineering with high operation flexibility, easy control of separated components, short equipment debugging time, and good separation effect.

[0004] The above application purpose of this application is achieved through the following technical solutions:

[0005] A reflux separation tower for petrochemical engineering, comprising a placement box body, a connecting pipe, an end cover, partition plate A, a middle partition plate, partition plate B, a heating device, a gas guide pipe, a cooling water pipe A, a cooling water pipe B, a return air pipe, a cooling module, a diversion branch pipe, a valve, a discharge pipe and a control switch. The connecting pipe is fixedly connected to the middle position at the upper end of the placement box body. The partition plate A is fixedly connected to the inner wall of the connecting pipe near the lower end. The middle partition plate is fixedly connected to the inner wall of the connecting pipe at a position slightly below the middle. The partition plate B is fixedly connected to the inner wall of the connecting pipe near the upper end. The heating device is fixedly connected to the bottom inside the placement box body. One end of the gas guide pipe sequentially passes through the upper surfaces of the partition plate A, the middle partition plate and the partition plate B from bottom to top, and after passing through the upper surface of the partition plate B, this end bends downward and passes through the lower surface of the middle partition plate. The part of the pipe body of the gas guide pipe between the partition plate B and the middle partition plate is spiral. One end of the cooling water pipe A is connected in a through manner to the connecting pipe corresponding to the upper surface of the middle partition plate. One end of the cooling water pipe B is connected in a through manner to the connecting pipe corresponding to the lower surface of the partition plate B. One end of the return air pipe is connected in a through manner to the connecting pipe corresponding to the lower surface of the middle partition plate. The cooling module is arranged on the outer surface of the return air pipe. There are two diversion branch pipes arranged on the return air pipe corresponding to the lower end of the cooling module. One of the diversion branch pipes extends into the position slightly below the middle of the placement box body. The valves are respectively connected in cooperation with the diversion branch pipes. One end of the discharge pipe is connected in a through manner to the connecting pipe corresponding to the upper surface of the partition plate A. The control switch is fixedly connected to the outer surface of one side of the placement box body. The input end of the control switch is electrically connected to the output end of an external power supply. The output end of the control switch is electrically connected to the input ends of the heating device and the cooling module respectively.

[0006] Optionally, it further includes a heater A and a heating pipe B. The heater A is connected to the outer surface of the cooling water pipe A. The heating pipe B is connected to the outer surface of the cooling water pipe A near the end connected to the connecting pipe.

[0007] Optionally, it further includes a circulating water pump. The circulating water pump is connected to the pipe body of the cooling water pipe B near the connecting pipe.

[0008] Optionally, it further includes a pressure relief pipe, a pressure valve A and a pressure valve B. One end of the pressure relief pipe is connected in a through manner to the connecting pipe corresponding to the lower surface of the partition plate A. The pressure valve A is connected to the pipe body of the pressure relief pipe near the lower end. The pressure valve B is fixedly connected to the middle position of the end cover. The upper end of the pressure relief pipe is connected in a through manner to the connecting pipe corresponding to the upper surface of the partition plate B.

[0009] Optionally, it further includes a liquid inlet pipe and a liquid discharge pipe. The liquid inlet pipe is connected to the middle position on one side of the placement box body. The liquid discharge pipe is arranged on the lower surface on one side of the placement box body.

[0010] Optionally, it further includes a baffle. The baffle is fixedly connected to the inner wall of the placement box body at equal intervals. The lower end of the baffle is higher than the upper surface of the heating device.

[0011] Optionally, it further includes a heat insulation cylinder, and the heat insulation cylinder is fixedly connected to the outer surface of the vertical part of the air guide pipe.

[0012] Optionally, it further includes support blocks, and the support blocks are fixedly connected to the lower surface of the placement box body in a rectangular array.

[0013] In summary, the present application includes at least one of the following beneficial technical effects:

[0014] The reflux separation tower for petrochemical engineering can condense volatile substances at a certain temperature in raw materials or other collected liquids, has the effects of more stable temperature control and shortening the consumption time of commissioning equipment, and has strong practicability;

[0015] The reflux separation tower for petrochemical engineering has a more reasonable structure. After the flow directions of liquid and gas are spatially distributed, precise reflux and separation can be achieved. The remaining gas can be separated after being condensed again or recycled after being heated, further improving the separation effect of the extract;

[0016] The reflux separation tower for petrochemical engineering has raw materials required for production that are relatively easy to purchase, reduces the setting of structures such as sieves, reduces the occurrence of internal blockage, is not prone to failure during use, reduces the use cost, and is more easily accepted by people. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic cross-sectional structure diagram of an embodiment of the present application;

[0018] Figure 2 is a schematic side cross-sectional structure diagram of an embodiment of the present application;

[0019] Figure 3 is a schematic rear structure diagram of an embodiment of the present application.

[0020] Reference numerals: 1. Placement box body; 2. Connecting pipe; 3. End cover; 4. Partition A; 5. Middle partition; 6. Partition B; 7. Heating device; 8. Air guide pipe; 9. Cooling water pipe A; 10. Cooling water pipe B; 11. Return air pipe; 12. Cooling module; 13. Diversion branch pipe; 14. Valve; 15. Discharge pipe; 16. Heater A; 17. Heating pipe B; 18. Circulation water pump; 19. Pressure relief pipe; 20. Pressure valve A; 21. Pressure valve B; 22. Liquid inlet pipe; 23. Liquid discharge pipe; 24. Baffle; 25. Heat insulation cylinder; 26. Support block; 27. Control switch. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following further describes the present application in detail with reference to the drawings.

[0022] To more clearly understand the technical solutions presented in the embodiments of this application, first, the operation of an existing reflux separation tower for petrochemical engineering will be introduced.

[0023] There is an existing reflux separation tower for petrochemical engineering. By heating with a bottom boiler, the internal substances are vaporized and cooled sequentially during the upward process to obtain different substances. However, in this operation mode, the purity of each obtained substance component is relatively low. Subsequently, multiple separation towers need to be connected in series to work simultaneously, resulting in significant energy waste for the separation process that sometimes only requires separating one substance in the middle. It is also necessary to remix other substances into the original solution. Therefore, a reflux separation tower dedicated to separating a single substance needs to be set up to solve these problems.

[0024] Please refer to Figure 1 , a reflux separation tower for petrochemical engineering disclosed in the embodiments of this application, includes a placement box body 1, a connecting pipe 2, an end cover 3, a partition A 4, a middle partition 5, a partition B 6, a heating device 7, a gas guide pipe 8, a cooling water pipe A 9, a cooling water pipe B 10, a return air pipe 11, a cooling module 12, a diversion branch pipe 13, a valve 14, a discharge pipe 15, and a control switch 27. The connecting pipe 2 is fixedly connected to the middle position at the upper end of the placement box body 1. The partition A 4 is fixedly connected to the inner wall of the connecting pipe 2 near the lower end. The middle partition 5 is fixedly connected to the inner wall of the connecting pipe 2 at a position slightly below the middle. The partition B 6 is fixedly connected to the inner wall of the connecting pipe 2 near the upper end. The heating device 7 is fixedly connected to the bottom inside the placement box body 1. One end of the gas guide pipe 8 sequentially passes through the upper surfaces of the partition A 4, the middle partition 5, and the partition B 6 from bottom to top, and after passing through the upper surface of the partition B 6, this end bends downward and passes through the lower surface of the middle partition 5. The part of the gas guide pipe 8 between the partition B 6 and the middle partition 5 is in a spiral shape. One end of the cooling water pipe A 9 is connected to the connecting pipe 2 corresponding to the upper surface of the middle partition 5 in a through manner. One end of the cooling water pipe B 10 is connected to the connecting pipe 2 corresponding to the lower surface of the partition B 6 in a through manner. One end of the return air pipe 11 is connected to the connecting pipe 2 corresponding to the lower surface of the middle partition 5 in a through manner. The cooling module 12 is arranged on the outer surface of the return air pipe 11. Two diversion branch pipes 13 are provided on the return air pipe 11 corresponding to the lower end of the cooling module 12. One of the diversion branch pipes 13 extends into the position slightly below the middle of the placement box body 1. Valves 14 are respectively connected to the diversion branch pipes 13 in a matching manner. One end of the discharge pipe 15 is connected to the connecting pipe 2 corresponding to the upper surface of the partition A 4 in a through manner. The control switch 27 is fixedly connected to the outer surface of one side of the placement box body 1. The input end of the control switch 27 is electrically connected to the output end of an external power supply. The output end of the control switch 27 is electrically connected to the input ends of the heating device 7 and the cooling module 12 respectively.

[0025] Specifically, the provided placement box 1 is used to hold the mixed solution that needs to separate a certain substance, which can meet the small-batch temporary separation requirements. When in use, the liquid is added into the interior of the placement box 1. Then, under the operation of the heating device 7, volatilization of the target and other substances can occur. Subsequently, the volatile gas rises to the lower end of the connecting pipe 2, then moves upward through the lower end of the air guide pipe 8, and after passing through the highest end, it moves downward. When the mixed gas enters the spiral section between the middle partition 5 and the partition B6, a condensing liquid at a certain temperature is introduced into the cooling water pipe A9, and the temperature in the cooling water pipe A9 is adjusted in real time and discharged through the cooling water pipe B10. At this time, the liquid in the spiral pipe part can fully contact the condensing liquid at a certain temperature, and then liquefy and gather in the space between the partition A4 and the middle partition 5. The gathered liquid is the target substance, and the remaining gases with different condensation points are discharged through the return air pipe 11. The provided partition A4, middle partition 5, and partition B6 respectively have heat insulation functions, which can avoid heat conduction between the upper and lower sides. Thus, the discharged gas can be completely liquefied when passing through the cooling module 12 and discharged through the provided diversion branch pipe 13. A valve 14 is provided on the diversion branch pipe 13, which can realize the operations of reflux or re-separation, enabling the condensing liquid to be separated again, further improving the separation efficiency, contributing to the complete separation of the target substance, and having good practicability. It can better solve the existing practical problems of inability to separate single substances, high cost, and low efficiency.

[0026] Please refer to Figure 1 , as another specific implementation manner disclosed in the embodiment of the present application, it further includes a heater A16 and a heating pipe B17. The heater A16 is connected to the outer surface of the cooling water pipe A9, and the heating pipe B17 is connected to the outer surface of the cooling water pipe A9 near the connecting pipe 2.

[0027] Specifically, the provided heater A16 can increase the temperature of the cooling water pipe A9. By adding a set of heating pipe B17, the temperature of the condensing liquid can be better controlled, avoiding an increase in the content of other substances caused by too low a temperature of the condensing liquid. The temperature control is more rapid, shortening the debugging time of the equipment. The input ends of the heater A16 and the heating pipe B17 are respectively electrically connected to the output end of the control switch 27.

[0028] Please refer to Figure 1 , as another specific implementation manner disclosed in the embodiment of the present application, it further includes a circulating water pump 18. The circulating water pump 18 is connected to the pipe body of the cooling water pipe B10 near the connecting pipe 2.

[0029] Specifically, the setting of the circulating water pump 18 can extract the internal condensing liquid. Since the high-temperature gas enters from above, by extracting the upper liquid, the condensing liquid at an appropriate temperature can be quickly replenished, improving the condensing effect.

[0030] Please refer to Figure 3 , as another specific implementation manner disclosed in the embodiments of the present application, it further includes a pressure relief pipe 19, a pressure valve A 20, and a pressure valve B 21. One end of the pressure relief pipe 19 is connected to the connecting pipe 2 corresponding to the lower surface of the partition A through connection. The pressure valve A 20 is connected to the pipe body of the pressure relief pipe 19 near the lower end. The pressure valve B 21 is fixedly connected to the middle position of the end cover 3. The upper end of the pressure relief pipe 19 is connected to the connecting pipe 2 corresponding to the upper surface of the partition B through connection.

[0031] Specifically, the setting of the pressure relief pipe 19 can introduce gas into the space formed between the end cover and the partition B through the pressure valve A 20 when the internal pressure exceeds the set safety pressure, realizing a certain amount of pressure release and avoiding the direct discharge of the gas to the outside. The set pressure value of the pressure valve B 21 is greater than that of the pressure valve A 20, which can relieve pressure in time when the pressure exceeds the maximum safety range, ensuring the safety during the separation process.

[0032] Please refer to Figure 2 , as another specific implementation manner disclosed in the embodiments of the present application, it further includes a liquid inlet pipe 22 and a liquid discharge pipe 23. The liquid inlet pipe 22 is connected to the middle position on one side of the placement box body 1, and the liquid discharge pipe 23 is arranged on the lower surface of one side of the placement box body 1.

[0033] Specifically, the settings of the liquid inlet pipe 22 and the liquid discharge pipe 23 can realize the timely replenishment of liquid or the discharge of the participating liquid and the cleaning liquid, and can also realize dynamic separation through transformation, improving the scope of application.

[0034] Please refer to Figure 2 , as another specific implementation manner disclosed in the embodiments of the present application, it further includes a baffle 24. The baffle 24 is fixedly connected to the inner wall of the placement box body 1 at equal intervals, and the lower end of the baffle 24 is higher than the upper surface of the heating device 7.

[0035] Specifically, the setting of the baffle 24 can divide the space inside the placement box body 1, thereby forming multiple spaces, reducing the fluidity between them, and improving the stability during the working process.

[0036] Please refer to Figure 1 , as another specific implementation manner disclosed in the embodiments of the present application, it further includes a heat insulation cylinder 25. The heat insulation cylinder 25 is fixedly connected to the outer surface of the vertical part of the air guide pipe 8.

[0037] Specifically, the setting of the heat insulation cylinder 25 can avoid the influence of gases at different temperatures on the surrounding space when passing through, and improve the separation effect.

[0038] Please refer to Figure 3, as another specific implementation manner disclosed in the embodiments of the present application, it further includes a support block 26, and the support blocks 26 are fixedly connected to the lower surface of the placement box body 1 in a rectangular array.

[0039] Specifically, the setting of the support block 26 can support the placement box body 1 to a position away from the ground, improve the flow of the gas at the lower end, help reduce rust, extend the service life, and reduce the special requirements for the use site.

[0040] The embodiments of this specific implementation manner are all preferred embodiments of the present application, and do not limit the protection scope of the present application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A reflux separation column for petrochemical engineering, characterized in that: It includes a placement box (1), a connecting pipe (2), an end cover (3), a partition A (4), a middle partition (5), a partition B (6), a heating device (7), a gas guide pipe (8), a cooling water pipe A (9), a cooling water pipe B (10), a return air pipe (11), a cooling module (12), a diversion branch pipe (13), a valve (14), a discharge pipe (15) and a control switch (27). The connecting pipe (2) is fixedly connected to the middle position at the upper end of the placement box (1). The partition A (4) is fixedly connected to the inner wall of the connecting pipe (2) near the lower end. The middle partition (5) is fixedly connected to the inner wall of the connecting pipe (2) at a position slightly below the middle. The partition B (6) is fixedly connected to the inner wall of the connecting pipe (2) near the upper end. The heating device (7) is fixedly connected to the bottom inside the placement box (1). One end of the gas guide pipe (8) sequentially passes through the upper surfaces of the partition A (4), the middle partition (5) and the partition B (6) from bottom to top, and after passing through the upper surface of the partition B (6), this end bends downward and passes through the lower surface of the middle partition (5). The part of the gas guide pipe (8) between the partition B (6) and the middle partition (5) is spiral. One end of the cooling water pipe A (9) is connected in a through manner to the connecting pipe (2) corresponding to the upper surface of the middle partition (5). One end of the cooling water pipe B (10) is connected in a through manner to the connecting pipe (2) corresponding to the lower surface of the partition B (6). One end of the return air pipe (11) is connected in a through manner to the connecting pipe (2) corresponding to the lower surface of the middle partition (5). The cooling module (12) is arranged on the outer surface of the return air pipe (11). Two diversion branch pipes (13) are arranged on the return air pipe (11) corresponding to the lower end of the cooling module (12). One of the diversion branch pipes (13) extends into the position slightly below the middle of the placement box (1). The valves (14) are respectively connected in cooperation with the diversion branch pipes (13). One end of the discharge pipe (15) is connected in a through manner to the connecting pipe (2) corresponding to the upper surface of the partition A (4). The control switch (27) is fixedly connected to the outer surface of one side of the placement box (1). The input end of the control switch (27) is electrically connected to the output end of an external power supply. The output end of the control switch (27) is electrically connected to the input ends of the heating device (7) and the cooling module (12) respectively.

2. The reflux separation column for petrochemical engineering according to claim 1, characterized in that: It further includes a heater A (16) and a heating pipe B (17). The heater A (16) is connected to the outer surface of the cooling water pipe A (9). The heating pipe B (17) is connected to the outer surface of the cooling water pipe A (9) near the end close to the connecting pipe (2).

3. The reflux separation column for petrochemical engineering according to claim 1, characterized in that: It further includes a circulating water pump (18). The circulating water pump (18) is connected to the pipe body of the cooling water pipe B (10) near the connecting pipe (2).

4. A reflux separation column for petrochemical engineering according to claim 1, characterized in that: It further includes a pressure relief pipe (19), a pressure valve A (20) and a pressure valve B (21). One end of the pressure relief pipe (19) is connected in a through manner to a connecting pipe (2) corresponding to the lower surface of partition A (4). The pressure valve A (20) is connected to the pipe body of the pressure relief pipe (19) near the lower end. The pressure valve B (21) is fixedly connected to the middle position of the end cover (3). The upper end of the pressure relief pipe (19) is connected in a through manner to a connecting pipe (2) corresponding to the upper surface of partition B (6).

5. A reflux separation column for petrochemical engineering according to claim 1, characterized in that: It further includes a liquid inlet pipe (22) and a liquid discharge pipe (23). The liquid inlet pipe (22) is connected to the middle position on one side of the placement box body (1). The liquid discharge pipe (23) is arranged on the lower surface of one side of the placement box body (1).

6. The reflux separation column for petrochemical engineering according to claim 4, characterized in that: It further includes a baffle (24). The baffle (24) is fixedly connected to the inner wall of the placement box body (1) at equal intervals. The lower end of the baffle (24) is higher than the upper surface of the heating device (7).

7. A reflux separation column for petrochemical engineering according to claim 1, characterized in that: It further includes a heat insulation cylinder (25). The heat insulation cylinder (25) is fixedly connected to the outer surface of the vertical part of the air guide pipe (8).

8. The reflux separation column for petrochemical engineering according to claim 1, wherein: It further includes a support block (26). The support blocks (26) are fixedly connected to the lower surface of the placement box body (1) in a rectangular array.

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