Pressure relief pipeline device for reducing operating pressure of deisobutanizer

Abstract

The utility model relates to the technical field of petrochemical engineering, and discloses a pressure relief pipeline device for reducing the operating pressure of a deisobutanizer, which comprises a deisobutanizer return tank and a compressor liquid separation tank, and further comprises a tank body internally provided with a mounting area; the bearing frame is arranged on the inner side of the tank body and located in the mounting area of the tank body; the spiral cooling component is arranged on the bearing frame and located in the mounting area of the tank body, a feeding pipe is further arranged on the spiral cooling component, the other end of the feeding pipe is communicated with the deisobutanizer return tank, and an isobutane gas-liquid mixture output by the deisobutanizer return tank can enter the spiral cooling component through the feeding pipe and is cooled through the spiral cooling component. And gaseous isobutane is converted into liquid isobutane under the cooling action of the spiral cooling component. The pressure relief pipeline device for reducing the operating pressure of the deisobutanizer aims at solving the problems that a deisobutanizer in an existing alkylation device is too high in operating pressure, large in energy consumption and limited in flexibility.

Description

Technical Field

[0001] This utility model relates to the field of petrochemical technology, specifically to a pressure relief pipeline device for reducing the operating pressure of an isobutane removal tower. Background Technology

[0002] In the prior art, for alkylation units using propylene, butene, pentene and isobutane as raw materials, the operating pressure of the isobutane removal tower is usually maintained in the range of 550 to 650 kPa. This pressure range ensures the effective progress of the alkylation reaction and the stable separation of products. At the same time, the compressor separator in the unit operates in a relatively low pressure environment, with an operating pressure of approximately 10 to 20 kPa.

[0003] In current alkylation units, isobutane in the deisobutane reflux tank is circulated to the alkylation reactor in liquid form. While this operation method ensures the continuity and stability of the process to some extent, it fails to effectively utilize the pressure difference between the deisobutane tower and subsequent process units, resulting in wasted potential energy recovery opportunities. Since isobutane is transported in liquid state, the required pumping energy is relatively high, which undoubtedly increases the energy consumption of the entire system. At the same time, this operation method has no positive impact on the operating pressure of the deisobutane tower. The stability of the tower pressure mainly depends on external adjustment methods rather than optimization of internal material circulation, which limits the flexibility of the unit in dealing with different operating conditions. Utility Model Content

[0004] The purpose of this invention is to solve the problems of excessively high operating pressure, high energy consumption, and limited flexibility of the isobutane removal tower in existing alkylation units, and to propose a pressure relief pipeline device for reducing the operating pressure of the isobutane removal tower.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0006] A pressure relief pipeline device for reducing the operating pressure of an isobutane removal tower includes: an isobutane removal tower reflux tank and a compressor separator tank, and further includes:

[0007] The tank body has an installation area inside;

[0008] The receiving frame is located inside the tank and within the installation area of ​​the tank.

[0009] A spiral cooling component is installed on the receiving frame and located within the installation area of ​​the tank. The spiral cooling component is also equipped with a feed pipe, the other end of which is connected to the reflux tank of the isobutane removal tower. The isobutane gas-liquid mixture output from the reflux tank of the isobutane removal tower can enter the spiral cooling component through the feed pipe, so that the gaseous isobutane is converted into liquid under the cooling effect of the spiral cooling component. The liquid isobutane can be collected by the receiving frame.

[0010] The storage tank is fixedly installed on the side wall of the tank body. The storage tank is connected to the tank body. An output pipe is provided between the storage tank and the compressor separator. A flow regulating valve is installed on the output pipe. The flow regulating valve is adjusted to control the flow rate of gaseous isobutane, thereby reducing tower pressure and energy consumption.

[0011] Based on the above technical solution, the present invention can be further improved as follows.

[0012] Furthermore, the receiving frame has a V-shaped cross-section, and at least four supports are fixedly installed on the outer side of the receiving frame. The other end of the supports is fixedly connected to the inner wall of the tank. The inner side of the receiving frame is also connected to a conveying pipe that extends through and out of the tank, through which liquid isobutane can flow out of the tank.

[0013] Furthermore, a defoaming screen is fixedly installed at the end of the receiving frame away from the support. The defoaming screen is arranged in a ring shape and is fitted onto the outside of the spiral cooling component.

[0014] Furthermore, the spiral cooling component includes:

[0015] The spiral square tube is fixedly installed on the inner side of the receiving frame. Its overall shape is spiral, and its interior has a cooling and fixing area.

[0016] Spiral heat exchange tubes are fixedly installed in the cooling fixed area of ​​the spiral square tube. There are no fewer than five spiral heat exchange tubes, which are arranged at equal intervals. Both ends of the spiral heat exchange tubes pass through and extend to the outside of both ends of the spiral square tube. The end of the spiral heat exchange tube away from the receiving frame is connected to the feed pipe.

[0017] The connecting pipe has one end penetrating the tank body and extending to the inside of the spiral square tube, and the other end located on the outside of the tank body. There are two connecting pipes, which are arranged one above the other.

[0018] Furthermore, a mounting bracket is fixedly installed on the surface of the tank away from the ground, and a drive motor is fixedly installed on the surface of the mounting bracket. A rotating blade with one end penetrating through and extending into the inside of the tank is fixedly installed at the output end of the drive motor. The rotating blade is located at the center of the spiral square tube, and the position of the rotating blade is adapted to the position of the end of the spiral heat exchange tube away from the feed pipe.

[0019] Furthermore, a connecting pipe is fixedly installed on the surface of the tank, with one end penetrating and extending to the inside of the tank body, and the other end of the connecting pipe penetrating and extending to the inside of the storage tank. The tank body and the storage tank are connected by the connecting pipe, and a one-way valve is also provided on the outside of the connecting pipe.

[0020] Furthermore, an air compressor is fixedly installed on the surface of the tank away from the ground. The output end of the air compressor is connected to a first pipe that extends through and into the inside of the storage tank, and the suction end of the air compressor is connected to a second pipe that extends through and into the inside of the tank.

[0021] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0022] The spiral cooling component in this invention can receive the isobutane gas-liquid mixture output from the isobutane removal tower reflux tank. Under cooling, it converts the gaseous isobutane into a liquid state. This process not only improves the utilization efficiency of isobutane but also reduces the content of gaseous components in the tower through condensation, thereby helping to reduce the operating pressure of the isobutane removal tower. The receiving frame can collect the converted liquid isobutane in the spiral cooling component, while the storage tank is used to temporarily store this liquid isobutane, realizing continuous and stable delivery of isobutane and avoiding operational instability that may be caused by pressure fluctuations. It is also equipped with an output pipe and a flow regulating valve. By adjusting the flow regulating valve, the flow rate of isobutane from the storage tank to the compressor separator can be controlled, thereby achieving precise regulation of the operating pressure of the isobutane removal tower, improving the flexibility of the device, and reducing energy consumption by making reasonable use of pressure differences. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall connection structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the connection structure between the tank body and the receiving frame of this utility model;

[0025] Figure 3 This is a schematic diagram of the connection structure between the tank body and the conveying pipe of this utility model;

[0026] Figure 4 This is a schematic diagram of the connection structure between part of the spiral cooling component and the feed pipe of this utility model;

[0027] Figure 5 This is a schematic diagram of the connection structure between the spiral cooling component and the feed pipe of this utility model.

[0028] In the diagram: 1. Isobutane removal tower reflux tank; 2. Compressor separator; 3. Tank body; 4. Receiving frame; 5. Spiral cooling component; 51. Spiral square tube; 52. Spiral heat exchange tube; 53. Connecting pipe; 6. Feed pipe; 7. Storage tank; 8. Output pipe; 9. Flow regulating valve; 10. Support; 11. Conveying pipe; 12. Defoaming screen; 13. Fixing frame; 14. Drive motor; 15. Rotating blades; 16. Connecting pipe; 17. Check valve; 18. Air compressor; 19. First pipe body; 20. Second pipe body. Detailed Implementation

[0029] 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.

[0030] Combination Figures 1-5 As shown, this utility model discloses a pressure relief pipeline device for reducing the operating pressure of an isobutane removal tower, comprising: an isobutane removal tower reflux tank 1 and a compressor separator tank 2, and further comprising:

[0031] Tank 3, with an installation area inside;

[0032] The receiving frame 4 is located inside the tank body 3 and within the installation area of ​​the tank body 3;

[0033] The spiral cooling component 5 is installed on the receiving frame 4 and located within the installation area of ​​the tank body 3. The spiral cooling component 5 is also equipped with a feed pipe 6. The other end of the feed pipe 6 is connected to the isobutane removal tower reflux tank 1. The isobutane gas-liquid mixture output from the isobutane removal tower reflux tank 1 can enter the spiral cooling component 5 through the feed pipe 6, so that the gaseous isobutane is converted into liquid under the cooling effect of the spiral cooling component 5. The liquid isobutane can be collected by the receiving frame 4.

[0034] Storage tank 7 is fixedly installed on the side wall of tank body 3. Storage tank 7 is interconnected with tank body 3. An output pipe 8 is provided between storage tank 7 and compressor separator 2. A flow regulating valve 9 is provided on the output pipe 8. The flow regulating valve 9 is adjusted to control the flow rate of gaseous isobutane, thereby reducing tower pressure and energy consumption.

[0035] The tank 3 has a dedicated installation area inside to accommodate and support other key components. A receiving frame 4 is located within this installation area, primarily serving as a platform or support structure for installing the spiral cooling component 5. The spiral cooling component 5 utilizes a unique spiral structure to increase the contact area and time between the isobutane gas-liquid mixture and the cooling medium, thereby improving cooling efficiency. The spiral cooling component 5 also features a feed pipe 6, the other end of which is connected to the isobutane removal tower reflux tank 1, ensuring that the isobutane gas-liquid mixture can smoothly enter the spiral cooling component 5 for cooling. Under the cooling action of the spiral cooling component 5, the gaseous isobutane is gradually converted into a liquid state. This liquid isobutane is then collected by the receiving frame 4. The design of the receiving frame 4 not only facilitates the collection of liquid isobutane... The collection of isobutane also ensures its effective separation from gaseous isobutane. Meanwhile, storage tank 7 is fixedly installed on the side wall of tank body 3 and interconnected with it. The main function of storage tank 7 is to temporarily store the gaseous isobutane separated from tank body 3. To send the gaseous isobutane in storage tank 7 to compressor separator 2 for further processing, the device is also designed with an output pipe 8 and a flow regulating valve 9. The output pipe 8 connects storage tank 7 and compressor separator 2, while the flow regulating valve 9 is installed on the output pipe 8. By adjusting the opening of the flow regulating valve 9, operators can precisely control the flow rate of isobutane, thereby achieving precise adjustment of the operating pressure of the isobutane removal tower. This adjustment method not only helps reduce tower pressure and energy consumption but also ensures a stable supply and efficient utilization of isobutane.

[0036] In a preferred embodiment, this utility model can be further configured as follows: Figure 2 , Figure 3As shown; the cross-section of the receiving frame 4 is V-shaped. At least four supports 10 are fixedly installed on the outer side of the receiving frame 4. The other end of each support 10 is fixedly connected to the inner wall of the tank 3. The inner side of the receiving frame 4 is also connected to a feed pipe 11 that extends through and out of the tank 3. Liquid isobutane can flow out of the tank 3 through the feed pipe 11. During the operation of the alkylation unit, the isobutane gas-liquid mixture output from the isobutane removal tower reflux tank 1 is cooled by the spiral cooling component 5. The liquid isobutane then falls into the specially designed receiving frame 4, whose cross-section is V-shaped. This design allows the liquid isobutane to flow more smoothly to its bottom and effectively avoids liquid accumulation and stagnation. Simultaneously, the V... The structure also increases the surface area of ​​the receiving frame 4, improving the collection efficiency of liquid isobutane. To ensure the stability and reliability of the receiving frame 4, at least four supports 10 are fixedly installed on its outer side. The other end of these supports 10 is fixedly connected to the inner wall of the tank 3, forming a stable support structure. This design not only enhances the load-bearing capacity of the receiving frame 4, but also ensures its stability and positional accuracy inside the tank 3. When the liquid isobutane in the receiving frame 4 accumulates to a certain amount, it can be discharged to the outside of the tank 3 through the feed pipe 11 connected to its inner side. After the liquid isobutane in the tank 3 is output through the feed pipe 11, it can be further extracted by the isobutane circulation pump and participate in the process of the entire alkylation unit.

[0037] In a preferred embodiment, this utility model can be further configured as follows: Figure 1 , Figure 2As shown; a defoaming screen 12 is fixedly installed on the end of the receiving frame 4 away from the support 10. The defoaming screen 12 is arranged in a ring and is fitted onto the outside of the spiral cooling component 5. During the operation of the alkylation unit, the isobutane gas-liquid mixture output from the isobutane removal tower reflux tank 1 first enters the spiral cooling component 5 through the feed pipe 6. The spiral cooling component 5, through its cooling effect, converts the gaseous isobutane in the mixture into liquid. At the same time, the liquid isobutane falls into the receiving frame 4 for collection under the action of gravity. In order to further optimize the gas-liquid separation effect, a defoaming screen 12 is fixedly installed on the end of the receiving frame 4 away from the support 10. The defoaming screen 12 is arranged in a ring and is tightly fitted onto the outside of the spiral cooling component 5. This design makes the gas-liquid mixture from the spiral cooling component... The mixture of liquid and gaseous isobutane in component 5 can impact the defoaming screen 12. The function of the defoaming screen 12 is to further separate the gas and liquid isobutane. When the mixture impacts the defoaming screen 12, the liquid isobutane is blocked on the inside of the defoaming screen 12 and flows down along the screen surface, eventually falling into the receiving frame 4. The gaseous isobutane can pass through the fine mesh of the defoaming screen 12 and continue to flow upward until it is processed by subsequent process equipment. Through the function of the defoaming screen 12, not only is the efficiency of gas-liquid separation improved, but the purity and collection quality of liquid isobutane are also ensured. At the same time, the design of the defoaming screen 12 also increases the stability and reliability of the device, avoiding operational instability that may be caused by the accumulation of gas-liquid mixture around the spiral cooling component 5.

[0038] In a preferred embodiment, this utility model can be further configured as follows: Figure 2 , Figure 4 and Figure 5 As shown; the spiral cooling component 5 includes:

[0039] The spiral square tube 51 is fixedly installed on the inner side of the receiving frame 4. Its whole body is spiral-shaped and has a cooling and fixing area inside.

[0040] Spiral heat exchange tube 52 is fixedly installed in the cooling fixed area of ​​spiral square tube 51. There are no fewer than five spiral heat exchange tubes 52, which are arranged at equal intervals. The two ends of the spiral heat exchange tube 52 pass through and extend to the outside of the two ends of the spiral square tube 51. The end of the spiral heat exchange tube 52 away from the receiving frame 4 is connected to the feed pipe 6.

[0041] The connecting pipe 53 has one end penetrating the tank body 3 and extending to the inner side of the spiral square tube 51, and the other end located on the outer side of the tank body 3. There are two connecting pipes 53, arranged vertically. The spiral square tube 51 is fixedly installed on the inner side of the receiving frame 4, and its overall shape is spiral, providing a stable support and cooling fixation area for the spiral heat exchange tube 52. The spiral heat exchange tubes 52 are fixedly installed in the cooling fixation area of ​​the spiral square tube 51, and there are no fewer than five of them, arranged at equal intervals. This design ensures that the isobutane gas-liquid mixture can be evenly distributed in each spiral heat exchange tube 52, thereby improving the cooling efficiency. When the isobutane gas-liquid mixture enters the spiral heat exchange tube 52 through the feed pipe 6, it will move along the spiral heat exchange tube 52. During this process, due to the special shape of the spiral heat exchange tube 52, the liquid isobutane in the isobutane gas-liquid mixture will be subjected to release force and thrown towards the spiral heat exchange tube. On the inner wall of heat pipe 52, under the action of gravity, liquid isobutane moves downward along the spiral heat exchange tube 52 and gradually merges to form large particles of liquid isobutane, which eventually fall into the receiving frame 4 for collection. In order to further improve the cooling efficiency, the device is also equipped with two connecting pipes 53. One end of the two connecting pipes 53 passes through the tank 3 and extends to the inner side of the spiral square tube 51, while the other end is located on the outer side of the tank 3 and is arranged vertically. In use, the cooler refrigerant enters the gap between the spiral square tube 51 and the spiral heat exchange tube 52 through the lower connecting pipe 53 to cool the spiral heat exchange tube 52. Then, the refrigerant flows into the cooling circulation system through the upper connecting pipe 53 to complete a complete cooling cycle. Through this design, the spiral cooling component 5 not only achieves effective cooling and gas-liquid separation of the isobutane gas-liquid mixture, but also accelerates the liquefaction process of gaseous isobutane through the operation of the cooling circulation system.

[0042] In a preferred embodiment, this utility model can be further configured as follows: Figure 1 , Figure 4As shown; a mounting bracket 13 is fixedly installed on the surface of the tank body 3 away from the ground, and a drive motor 14 is fixedly installed on the surface of the mounting bracket 13. A rotating blade 15 with one end penetrating through and extending into the inside of the tank body 3 is fixedly installed at the output end of the drive motor 14. The rotating blade 15 is located at the center of the spiral square tube 51, and the position of the rotating blade 15 is adapted to the position of the end of the spiral heat exchange tube 52 away from the feed pipe 6. During the operation of the alkylation unit, the isobutane gas-liquid mixture output from the isobutane removal tower reflux tank 1 is first introduced through the feed pipe 6. The mixture flows into the spiral cooling component 5, which consists of a spiral square tube 51 and a spiral heat exchange tube 52 fixedly installed inside it. Together, they cool the isobutane gas-liquid mixture. After cooling, some of the liquid isobutane falls into the receiving frame 4 under the action of gravity, while the remaining liquid isobutane and gaseous isobutane mixture continue to flow along the spiral heat exchange tube 52 until it is output from the end away from the feed pipe 6. At this time, the drive motor 14 on the fixed frame 13 on the surface of the tank body 3 away from the ground starts to function, driving... A rotating blade 15, with one end penetrating and extending into the inner side of the tank 3, is fixedly installed at the output end of the motor 14. The rotating blade 15 is located at the center of the spiral square tube 51, and its position is adapted to the position of the end of the spiral heat exchange tube 52 away from the feed pipe 6. This means that the liquid isobutane and gaseous isobutane mixture output from the end of the spiral heat exchange tube 52 will directly pass through the rotating blade 15. When the drive motor 14 is started, it will drive the rotating blade 15 to start rotating. The rotation of the rotating blade 15 causes the liquid isobutane and gaseous isobutane mixture passing over its surface to pass through it. The mixture is thrown outwards. Since the defoaming screen 12 is fixedly installed on the side of the receiving frame 4 away from the support 10, and is arranged in a ring and fitted on the outside of the spiral cooling component 5, the mixture thrown out will directly hit the defoaming screen 12. When the mixture hits the defoaming screen 12, due to the inertia of the liquid, the liquid isobutane will be blocked on the inside of the defoaming screen 12 and flow down along the screen surface, eventually falling into the receiving frame 4, while the gaseous isobutane can pass through the small mesh of the defoaming screen 12 and continue to flow upwards until it is processed by the subsequent process equipment.

[0043] In a preferred embodiment, this utility model can be further configured as follows: Figure 1 , Figure 2As shown; a connecting pipe 16 is fixedly installed on the surface of tank 3, with one end penetrating and extending to the inside of tank 3, and the other end penetrating and extending to the inside of storage tank 7. Tank 3 and storage tank 7 are connected by the connecting pipe 16. A one-way valve 17 is also provided on the outside of the connecting pipe 16. The design of the connecting pipe 16 allows gaseous isobutane, after cooling and gas-liquid separation inside tank 3, to flow smoothly into storage tank 7 for storage through the connecting pipe 16. To ensure the one-way flow of gaseous isobutane... In addition, a one-way valve 17 is installed on the outside of the connecting pipe 16. When gaseous isobutane flows from the tank 3 to the storage tank 7, the one-way valve 17 is configured to allow gaseous isobutane to pass through smoothly. When the gaseous isobutane inside the tank 3 accumulates to a certain amount, it will flow smoothly into the storage tank 7 for storage through the flow action of the connecting pipe 16 and the one-way valve 17. During this process, the reliable operation of the one-way valve 17 ensures the purity and storage quality of the gaseous isobutane, and also provides convenience for subsequent process operations.

[0044] In a preferred embodiment, this utility model can be further configured as follows: Figure 1 , Figure 2 As shown; an air compressor 18 is fixedly installed on the surface of tank 3 away from the ground. The output end of the air compressor 18 is connected to a first pipe 19 that extends through and into the inside of storage tank 7, and the suction end of the air compressor 18 is connected to a second pipe 20 that extends through and into the inside of tank 3. During the operation of the alkylation unit, when the amount of isobutane output from the isobutane deisobutane tower reflux tank 1 is large, this isobutane gas-liquid mixture will undergo a series of processing steps, and finally be cooled and separated into gas and liquid in tank 3. However, as the amount of isobutane increases, the gas pressure in tank 3 will gradually rise. At the same time, a corresponding pressure gauge is also installed on tank 3 to detect the pressure inside tank 3. In order to maintain the stable operation of the unit and avoid the safety hazards caused by excessive gas pressure, the unit is designed with an air compressor 18 and... The related pipe connection structure requires that when the gas pressure in tank 3 rises to a certain level, the switch of air compressor 18 needs to be turned on to start its operation. After air compressor 18 starts working, its suction end extracts isobutane gas from tank 3 through the second pipe 20. These gases may include gaseous isobutane that has not been completely liquefied from spiral heat exchange tube 52, as well as gaseous isobutane separated from defoaming screen 12. Then, air compressor 18 compresses these gases and delivers them to storage tank 7 through its output end and the first pipe 19. In storage tank 7, these compressed isobutane gases are stored and maintained at a high pressure. This design not only helps to maintain the gas pressure in tank 3 and prevent it from being too high and causing safety hazards, but also provides a reserve of high-pressure isobutane gas for subsequent process operations.

[0045] The specific working principle of the pressure relief pipeline device for reducing the operating pressure of the isobutane removal tower according to this utility model is as follows:

[0046] In use, the isobutane gas-liquid mixture output from the isobutane removal tower reflux tank 1 enters each spiral heat exchange tube 52 through the feed pipe 6 and moves through the spiral heat exchange tube 52 in a spiral state. During this process, the liquid isobutane in the isobutane gas-liquid mixture is thrown against the inner wall of the spiral heat exchange tube 52 under the action of release force, and moves downward along the spiral heat exchange tube 52 under the action of gravity. As the liquid isobutane moves along the spiral heat exchange tube 52, it gradually merges and forms large particles of liquid isobutane that fall down.

[0047] When a mixture of liquid and gaseous isobutane is output through the end of the spiral heat exchange tube 52, it passes through the rotating blade 15. The rotating blade 15 is driven by the drive motor 14. During the rotation of the rotating blade 15, the mixture of liquid and gaseous isobutane output from the end of the spiral heat exchange tube 52 is thrown towards the defoaming screen 12. The defoaming screen 12 further separates the gas and liquid of isobutane.

[0048] The two connecting pipes 53 are connected to the cooling circulation system. The cooler refrigerant enters the gap between the spiral square tube 51 and the spiral heat exchange tube 52 through the lower connecting pipe 53, and then flows into the cooling circulation system through the upper connecting pipe 53, so that the gaseous isobutane can be liquefied more quickly.

[0049] The gaseous isobutane between tank 3 and defoaming screen 12 enters storage tank 7 through connecting pipe 16 and one-way valve 17, and then enters compressor separator tank 2 through flow regulating valve 9 and output pipe 8 on storage tank 7;

[0050] When the amount of isobutane output from the isobutane removal tower reflux tank 1 is large, the gas pressure in the tank 3 rises. At this time, the air compressor 18 needs to be switched on. When the air compressor 18 is working, the isobutane gas between the tank 3 and the defoaming screen 12 is input into the storage tank 7 through the second pipe 20 and the first pipe 19, so that the storage tank 7 stores high-pressure isobutane gas.

[0051] The liquid isobutane in tank 3 is output through conveying pipe 11 and participates in the entire process through isobutane circulation pump;

[0052] It should also be noted that the function of the flow regulating valve 9 is to regulate the output speed of isobutane gas in the storage tank 7. When the gas output from the flash tank is insufficient, isobutane gas can be replenished in time to ensure the working efficiency of the compressor. At the same time, it can also prevent a large amount of gas from entering the gas-liquid separator when the gas pressure in the storage tank 7 is too high, so as to ensure that the isobutane gas in the flash tank can be discharged in time.

[0053] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0054] 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 pressure relief pipeline device for reducing the operating pressure of an isobutane removal tower, comprising: The isobutane removal tower reflux tank (1) and compressor separator (2) are characterized in that they further include: The tank body (3) has an installation area inside; The receiving frame (4) is located inside the tank body (3) and within the installation area of ​​the tank body (3); A spiral cooling component (5) is installed on the receiving frame (4) and located in the installation area of ​​the tank body (3). The spiral cooling component (5) is also provided with a feed pipe (6). The other end of the feed pipe (6) is connected to the isobutane stripping tower reflux tank (1). The isobutane gas-liquid mixture output from the isobutane stripping tower reflux tank (1) can enter the spiral cooling component (5) through the feed pipe (6) so that the gaseous isobutane is converted into liquid under the cooling effect of the spiral cooling component (5). The liquid isobutane can be collected by the receiving frame (4). Storage tank (7) is fixedly installed on the side wall of tank body (3). Storage tank (7) is connected to tank body (3). An output pipe (8) is provided between storage tank (7) and compressor separator (2). A flow regulating valve (9) is provided on the output pipe (8). The flow regulating valve (9) is adjusted to control the flow rate of gaseous isobutane, thereby reducing tower pressure and energy consumption.

2. A pressure relief pipeline device for reducing the operating pressure of an isobutane removal tower according to claim 1, characterized in that, The cross-section of the receiving frame (4) is V-shaped. At least four supports (10) are fixedly installed on the outside of the receiving frame (4). The other end of the supports (10) is fixedly connected to the inner wall of the tank (3). The inside of the receiving frame (4) is also connected to a conveying pipe (11) that extends through and to the outside of the tank (3). Liquid isobutane can flow out of the tank (3) through the conveying pipe (11).

3. A pressure relief pipeline device for reducing the operating pressure of an isobutane removal tower according to claim 2, characterized in that, A defoaming mesh (12) is fixedly installed on the side of the receiving frame (4) away from the support (10). The defoaming mesh (12) is arranged in a ring shape and is fitted on the outside of the spiral cooling component (5).

4. A pressure relief pipeline device for reducing the operating pressure of an isobutane removal tower according to claim 1, characterized in that, The spiral cooling component (5) includes: The spiral square tube (51) is fixedly installed on the inner side of the receiving frame (4). Its whole body is spiral-shaped and has a cooling and fixing area inside. Spiral heat exchange tubes (52) are fixedly installed in the cooling fixed area of ​​the spiral square tube (51). There are no fewer than five spiral heat exchange tubes (52) arranged at equal intervals. The two ends of the spiral heat exchange tubes (52) pass through and extend to the outside of the two ends of the spiral square tube (51). The end of the spiral heat exchange tube (52) away from the receiving frame (4) is connected to the feed pipe (6). The connecting pipe (53) has one end that passes through the tank body (3) and extends to the inside of the spiral square tube (51), and the other end that is located on the outside of the tank body (3). There are two connecting pipes (53), and the two connecting pipes (53) are arranged vertically.

5. A pressure relief pipeline device for reducing the operating pressure of an isobutane removal tower according to claim 4, characterized in that, A mounting bracket (13) is fixedly installed on the side of the tank (3) away from the ground. A drive motor (14) is fixedly installed on the surface of the mounting bracket (13). A rotating blade (15) with one end penetrating through and extending to the inside of the tank (3) is fixedly installed at the output end of the drive motor (14). The rotating blade (15) is located at the center of the spiral square tube (51). The position of the rotating blade (15) is adapted to the position of the end of the spiral heat exchange tube (52) away from the feed pipe (6).

6. A pressure relief pipeline device for reducing the operating pressure of an isobutane removal tower according to claim 1, characterized in that, A connecting pipe (16) is fixedly installed on the surface of the tank (3), with one end penetrating and extending to the inside of the tank (3). The other end of the connecting pipe (16) penetrates and extends to the inside of the storage tank (7). The tank (3) and the storage tank (7) are connected by the connecting pipe (16). A one-way valve (17) is also provided on the outside of the connecting pipe (16).

7. A pressure relief pipeline device for reducing the operating pressure of an isobutane removal tower according to claim 1, characterized in that, An air compressor (18) is fixedly installed on the surface of the tank (3) away from the ground. The output end of the air compressor (18) is connected to a first pipe (19) that extends through and into the inside of the storage tank (7). The suction end of the air compressor (18) is connected to a second pipe (20) that extends through and into the inside of the tank (3).

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