Cyclopropylamine stripping tower

Abstract

The utility model discloses a cyclopropylamine stripping tower which comprises a stripping tower main body, a plurality of packing layers arranged at intervals are arranged in the stripping tower main body, a liquid inlet pipe is arranged above the packing layer positioned at the topmost part, the liquid inlet pipe is divided into an inlet and an outlet, the inlet is positioned outside the stripping tower, the outlet is positioned inside the stripping tower, and the liquid inlet pipe is connected with the stripping tower main body. A gas inlet pipe is arranged below the filler layer located at the bottommost part, a liquid outlet pipe is arranged at the bottom of the stripping tower, a gas outlet pipe is arranged at the top of the stripping tower, and an exhaust plate is arranged between every two filler layers; each exhaust plate comprises a rotating disc rotationally mounted in the stripping tower, a fixed disc fixedly arranged in the stripping tower and a driving part, the rotating disc is rotationally arranged on the fixed disc, and corresponding through holes are formed in the rotating disc and the fixed disc. And the size of the vent hole is changed in a rotating manner, so that the use flexibility is improved.

Description

Technical Field

[0001] This utility model relates to the field of stripping tower technology, specifically to a cyclopropylamine stripping tower. Background Technology

[0002] Currently, cyclopropylamine stripping towers are important equipment for the separation and purification of cyclopropylamine. Their main function is to separate and recover cyclopropylamine through contact between the gas and liquid phases. In the design of stripping towers, the exhaust plate is a key component, which regulates the gas flow and ensures that the gas-liquid mass transfer process in the tower can proceed efficiently. The exhaust plates used in the existing technology usually have a fixed vent size. Although this design can ensure the gas flow in the tower to a certain extent, it also has some significant limitations, which may negatively affect the efficiency and stability of the entire separation process.

[0003] A search revealed a Chinese utility model patent with authorization announcement number CN209885277U, which discloses a stripping tower. This patent features exhaust assemblies made of high-strength steel plates at the top and bottom of multiple packing chambers. The assemblies include exhaust plates and support grids. The exhaust plates have evenly distributed exhaust holes, replacing the previously easily damaged wire mesh, thus improving strength and durability and reducing maintenance costs. However, this patent uses a fixed orifice diameter. The fixed orifice diameter exhaust plates cannot adaptively adjust the gas flow rate under different operating conditions. When the feed composition changes, the flow rate fluctuates, or the operating conditions change, the fixed vent holes lead to insufficient gas-liquid contact, affecting the separation effect. The fixed orifice diameter also leads to pressure buildup within the tower. Instability can occur when the gas flow rate is too high, resulting in a significant pressure drop that further affects liquid distribution and flow, thereby reducing the overall efficiency of the equipment. Fixed orifice diameters, under varying operating conditions, lead to suboptimal fluid dynamics within the tower, causing liquid short-circuiting or stagnation, which in turn affects mass transfer efficiency and operational stability. In actual production, the composition of raw materials and the gas-liquid ratio often change, and the fixed orifice design lacks flexibility, failing to adjust itself according to real-time operating conditions, thus limiting the equipment's adaptability. Over time, fixed orifices can become clogged due to the accumulation of dirt or other deposits, increasing the frequency and difficulty of maintenance and impacting equipment reliability. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to overcome the defects in the prior art. By setting up two exhaust plates, the size of the vent holes can be changed by rotation, thereby improving the flexibility of use.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is a cyclopropylamine stripping tower, comprising:

[0006] The stripping tower body has several spaced packing layers inside. A liquid inlet pipe is provided above the topmost packing layer. The liquid inlet pipe is divided into an inlet and an outlet. The inlet is located outside the stripping tower, and the outlet is located inside the stripping tower. An air inlet pipe is provided below the bottommost packing layer. A liquid outlet pipe is provided at the bottom of the stripping tower, and an air outlet pipe is provided at the top of the stripping tower.

[0007] An exhaust plate is provided between every two packing layers. The exhaust plate includes a turntable rotatably installed in the stripping tower, a fixed plate fixedly installed in the stripping tower, and a driving component.

[0008] The turntable is rotatably mounted on the fixed disk. Both the turntable and the fixed disk have corresponding through holes. The through slots on the turntable and the fixed disk are connected to form an airflow channel. The driving component is adapted to be connected to the turntable to drive the turntable to rotate on the fixed disk, so that the positions of the corresponding through slots on the turntable and the fixed disk are staggered, thereby changing the size of the airflow channel.

[0009] Furthermore, the exhaust plate also includes a fixing sleeve, the outer peripheral surface of which is connected to the inner wall of the stripping tower, the fixing plate is fixedly connected inside the fixing sleeve, and the turntable is rotatably installed inside the fixing sleeve.

[0010] Furthermore, a rotating sleeve is connected to the outer circumferential surface of the turntable, and a rotating groove is formed on the inner wall of the fixed sleeve at a position corresponding to the rotating sleeve, and the rotating sleeve is rotatably connected in the rotating groove.

[0011] Furthermore, the driving component includes a driving device, a driven bevel gear and a driving bevel gear, and an annular groove is provided on the side of the turntable that contacts the fixed plate, and the driven bevel gear is fixedly connected in the annular groove;

[0012] A rotating cavity is formed on the side of the fixed disk that contacts the turntable. The driving bevel gear is rotatably installed in the rotating cavity. The rotating cavity communicates with the annular groove. The driving bevel gear meshes with the driven bevel gear.

[0013] The output shaft of the drive device is connected to the driving bevel gear to drive the driving bevel gear to rotate, thereby driving the driven bevel gear to rotate, and in turn driving the turntable to rotate.

[0014] Furthermore, the exhaust plate also includes a sealing sleeve, which is fixedly sleeved on the outer circumferential surface of the stripping tower. The drive device is installed on one side of the sealing sleeve, and the output shaft of the drive device passes through the sealing sleeve, the stripping tower, and the fixed sleeve to the rotating cavity and is connected to the driving bevel gear.

[0015] The output shaft of the drive device is connected to the sealing sleeve via a rotary seal.

[0016] Furthermore, the outlet of the air inlet pipe is a straight pipe extending into the stripping tower. The straight pipe is connected to an inlet located outside the stripping tower. A straight liquid outlet hole is provided at the bottom of the straight pipe, and the straight liquid outlet hole communicates with the inner cavity of the straight pipe.

[0017] Furthermore, both sides of the straight pipe are connected to bends, the inner cavity of the bends is connected to the inner cavity of the straight pipe, and a side outlet is provided on the side of the bend facing the straight pipe, the side outlet being connected to the inner cavity of the bend.

[0018] Furthermore, the side outlet is divided into two parts: a narrow channel and a wide channel. The narrow channel is connected to the inside of the bend, and the wide channel is connected to the narrow channel. The wide channel communicates with the internal space of the stripping tower.

[0019] Furthermore, several spaced-apart diversion plates are provided on the surface of the channel that communicates with the internal space of the stripping tower.

[0020] Furthermore, the packing layers are divided into thick packing layers and sparse packing layers with the middle position of the stripping tower body as the boundary. The packing layer located at the top is the thick packing layer, and the packing layer located at the bottom is the sparse packing layer.

[0021] By adopting the above technical solution, this utility model has the following beneficial effects:

[0022] By using a structure consisting of a turntable and a fixed plate, when it is necessary to change the size of the airflow channel, the turntable is controlled to rotate on the fixed plate. This causes the originally aligned slots on the turntable and the fixed plate to shift in position, resulting in an overlapping pattern. The size of the airflow channel is changed by the partial overlap of the two slots, thereby controlling the speed of airflow.

[0023] By using straight and bent pipes, when cyclopropylamine liquid is introduced into the stripping tower body through the inlet pipe, it will be discharged into the stripping tower body through the straight outlet of the straight pipe and the side outlet of the bent pipe, respectively. This allows the cyclopropylamine liquid to be more evenly distributed on the packing layer and come into contact with the steam.

[0024] By setting up structures such as thick packing layers and sparse packing layers, the packing layer located in the upper part of the stripping tower body is set as a thick packing layer, and the packing layer located in the lower part of the stripping tower body is set as a sparse packing layer. This is to avoid the phenomenon of reaction by-products accumulating and clogging the packing layer in the lower packing layer. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model from the left side;

[0026] Figure 2 This is a schematic diagram of the overall structure of this utility model on the right side;

[0027] Figure 3 This is a schematic diagram of the internal structure of the stripping tower body of this utility model;

[0028] Figure 4 This is a schematic diagram of the exhaust plate structure of this utility model;

[0029] Figure 5 This is a cross-sectional view of the exhaust plate of this utility model;

[0030] Figure 6 This is a schematic diagram of the top surface of the liquid inlet pipe of this utility model;

[0031] Figure 7 This is a schematic diagram of the bottom surface of the liquid inlet pipe of this utility model;

[0032] Figure 8 This is a schematic diagram of the internal structure of the bent pipe of this utility model.

[0033] In the diagram: 1. Main body of the stripping tower; 2. Inlet pipe;

[0034] 3. Inlet pipe; 31. Inlet; 32. Outlet; 33. Straight pipe; 34. Bend; 35. Straight outlet hole; 36. Side outlet; 37. Narrow channel; 38. Wide channel; 39. Diverter plate;

[0035] 4. Gas outlet pipe; 5. Liquid outlet pipe;

[0036] 6. Exhaust plate; 61. Turntable; 62. Fixed plate; 63. Rotating sleeve; 64. Fixed sleeve; 65. Sealing sleeve; 66. Driven bevel gear; 67. Driving bevel gear; 68. Drive unit;

[0037] 7. Thick filler layer; 8. Sparse filler layer. Detailed Implementation

[0038] To make the contents of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0039] Example 1: As Figure 1-4 As shown, the cyclopropylamine stripping tower includes:

[0040] The stripping tower body 1 has several spaced packing layers inside. A liquid feed pipe 3 is installed above the top packing layer. The liquid feed pipe 3 is divided into an inlet 31 and an outlet 32. The inlet 31 is located outside the stripping tower, and the outlet 32 ​​is located inside the stripping tower. An air inlet pipe 2 is installed below the bottom packing layer. A liquid outlet pipe 5 is installed at the bottom of the stripping tower, and an air outlet pipe 4 is installed at the top of the stripping tower.

[0041] An exhaust plate 6 is provided between every two packing layers. The exhaust plate 6 includes a turntable 61 rotatably installed in the stripping tower, a fixed plate 62 fixedly installed in the stripping tower, and a driving component.

[0042] The turntable 61 is rotatably mounted on the fixed disk 62. Both the turntable 61 and the fixed disk 62 have corresponding through holes. The through slots on the turntable 61 and the fixed disk 62 are connected to form an airflow channel. The driving component is adapted to be connected to the turntable 61 to drive the turntable 61 to rotate on the fixed disk 62, so that the positions of the corresponding through slots on the turntable 61 and the fixed disk 62 are staggered, thereby changing the size of the airflow channel.

[0043] like Figure 4 As shown, the exhaust plate 6 also includes a fixing sleeve 64, the outer peripheral surface of the fixing sleeve 64 is connected to the inner wall of the stripping tower, the fixing plate 62 is fixedly connected inside the fixing sleeve 64, and the turntable 61 is rotatably installed inside the fixing sleeve 64.

[0044] like Figure 4 As shown, a rotating sleeve 63 is connected to the outer circumferential surface of the turntable 61, and a rotating groove is provided on the inner wall of the fixed sleeve 64 at a position corresponding to the rotating sleeve 63. The rotating sleeve 63 is rotatably connected in the rotating groove.

[0045] like Figure 5 As shown, the driving component includes a driving device 68, a driven bevel gear 66 and a driving bevel gear 67. An annular groove is provided on the side of the turntable 61 that contacts the fixed plate 62, and the driven bevel gear 66 is fixedly connected in the annular groove.

[0046] A rotating cavity is provided on the side of the fixed disk 62 that contacts the turntable 61. The driving bevel gear 67 is rotatably installed in the rotating cavity. The rotating cavity communicates with the annular groove. The driving bevel gear 67 meshes with the driven bevel gear 66.

[0047] The output shaft of the drive device 68 is connected to the drive bevel gear 67 to drive the drive bevel gear 67 to rotate, thereby driving the driven bevel gear 66 to rotate, and then driving the turntable 61 to rotate.

[0048] like Figure 4-5As shown, the exhaust plate 6 also includes a sealing sleeve 65, a fixing sleeve 64 of the sealing sleeve 65 is provided on the outer peripheral surface of the stripping tower, a drive device 68 is installed on one side of the sealing sleeve 65, and the output shaft of the drive device 68 passes through the sealing sleeve 65, the stripping tower and the fixing sleeve 64 to the rotating cavity and is connected to the drive bevel gear 67.

[0049] The output shaft of the drive unit 68 is connected to the sealing sleeve 65 via a rotary seal.

[0050] The working principle of this embodiment is as follows:

[0051] Cyclopropylamine liquid is introduced into the top of the stripping tower through inlet pipe 3 and distributed on the topmost packing layer. Heating steam is introduced into the bottom of the tower through inlet pipe 2, flowing upwards and counter-currently contacting the falling cyclopropylamine liquid. The packing layer provides ample contact surface area, making the mass and heat transfer process between the liquid and gas more efficient. The packing layer is fixed and limited by upper and lower support plates. The airflow is regulated by exhaust plates 6 between each packing layer. Exhaust plates 6 consist of a rotating disk 61 and a fixed disk 62. The rotation of the rotating disk 61 changes the degree of overlap of the channels, thereby adjusting the size of the airflow channel and the airflow speed. Throughout the process, cyclopropylamine liquid and steam exchange heat, evaporating unwanted volatile components. The volatile components carried by the steam are discharged from the exhaust pipe 4 at the top of the tower. After further treatment or condensation, the residual liquid is discharged from the liquid outlet pipe 5 at the bottom of the tower for further production or processing.

[0052] The specific process for adjusting the exhaust plate 6 is as follows: First, start the drive device 68. The drive device 68 can be a motor. The output shaft of the drive device 68 passes through the sealing sleeve 65, the stripping tower body 1, and the fixed sleeve 64, and is connected to the driving bevel gear 67, which drives the driving bevel gear 67 to rotate. The driving bevel gear 67 drives the driven bevel gear 66 to rotate through meshing. The driven bevel gear 66 drives the entire turntable 61 to rotate. The rotation of the turntable 61 is controlled by the rotating sleeve 63 set on the outer circumference, which rotates inside the fixed sleeve 64. The rotating sleeve 63 makes the rotation of the turntable 61 more stable. The fixed sleeve 64 can enclose both the fixed plate 62 and the turntable 61 inside, preventing steam from passing through any part other than the through slots on the turntable 61 and the fixed plate 62. However, one side of the turntable 61 and the fixed plate 62 are in contact. When the driven bevel gear 66 rotates, it will rotate on the fixed plate 62. In the initial state, the through slots on the turntable 61 and the fixed plate 62 are aligned and the same size. The through slots of the two are combined to form an airflow channel. The airflow channel is the largest when aligned. The rotation amplitude of the turntable 61 can be adjusted by the drive device 68. The rotation amplitude determines the degree of position offset of the through slots on the turntable 61. Different degrees of offset result in different degrees of overlap between the two through slots. Different degrees of overlap result in different sizes of the airflow channel. Therefore, by rotating the turntable 61, the size of the airflow channel can be changed, thereby changing the speed of the airflow.

[0053] Meanwhile, the rotation of the turntable 61 causes the relative position of the channel to change continuously. This dynamic movement can prevent materials or particles from staying in a fixed position for a long time, thereby reducing the possibility of blockage. The contact and friction generated by the relative movement between the turntable 61 and the fixed plate 62 can help remove particles or deposits attached to the edge of the channel. When the opening position of the channel changes, the airflow path will change. The changing airflow direction and speed can help flush away the attached materials. Overall, a certain degree of self-cleaning and blockage prevention effect is achieved.

[0054] It should be noted that the drive unit 68 is located outside the stripping tower body 1 and its output shaft needs to be inserted into the fixed sleeve 64. To ensure the sealing of the stripping tower body 1, it can be connected by a rotary seal. The rotary seal can be mechanical. Mechanical seals are commonly used for sealing rotating shafts. They prevent leakage through the tight contact between the stationary ring and the rotating ring. Mechanical seals can effectively cope with the rotation and vibration of the shaft and are suitable for high pressure and high temperature environments.

[0055] Example 2: Figure 6-7As shown, this embodiment further includes the following structure based on embodiment one: the outlet 32 ​​of the liquid inlet pipe is a straight pipe 33 extending into the stripping tower. The straight pipe 33 is connected to the inlet 31 located outside the stripping tower. A straight liquid outlet hole 35 is opened at the bottom of the straight pipe 33, and the straight liquid outlet hole 35 communicates with the inner cavity of the straight pipe 33.

[0056] like Figure 6-7 As shown, both sides of the straight pipe 33 are connected to a bend pipe 34. The inner cavity of the bend pipe 34 is connected to the inner cavity of the straight pipe 33. A side outlet 36 is provided on the side of the bend pipe 34 facing the straight pipe 33. The side outlet 36 is connected to the inner cavity of the bend pipe 34.

[0057] like Figure 8 As shown, the side outlet 36 is divided into two parts: a narrow channel 37 and a wide channel 38. The narrow channel 37 is connected to the inside of the bend 34, and the wide channel 38 is connected to the narrow channel 37. The wide channel 38 communicates with the internal space of the stripping tower.

[0058] like Figure 8 As shown, several spaced-apart flow dividers 39 are provided on the surface of the wide channel 38 that communicates with the internal space of the stripping tower.

[0059] like Figure 3 As shown, several packing layers are divided into a thick packing layer 7 and a sparse packing layer 8 with the middle position of the stripping tower body 1 as the boundary. The packing layer located at the top is the thick packing layer 7, and the packing layer located at the bottom is the sparse packing layer 8.

[0060] The working principle of this embodiment is as follows:

[0061] Cyclopropylamine liquid is introduced into the top of the stripping tower through the inlet pipe 3, and then distributed on the top packing layer through the straight pipe 33 and the bend pipe 34 system. The straight outlet hole 35 of the straight pipe 33 and the side outlet 36 of the bend pipe 34 ensure uniform liquid distribution.

[0062] After the cyclopropylamine liquid is introduced into the interior of the stripping tower body 1, since the path of the straight pipe 33 is relatively shorter than that of the bent pipe 34, the liquid output of the straight outlet 35 on the straight pipe 33 needs to be less than that of the side outlet 36 on the bent pipe 34, so as to avoid too much cyclopropylamine liquid distributed in the middle part of the packing layer.

[0063] The cyclopropylamine liquid flowing into the bend 34 is discharged through the side outlet 36. In the bend 34, the cyclopropylamine liquid first fills the inner cavity of the bend 34, and then passes through the narrow channel 37. In the narrow channel 37, it is squeezed by the inner wall of the narrow channel 37. After passing through the narrow channel 37, it enters the wide channel 38. The space of the wide channel 38 is larger than that of the narrow channel 37. When it enters the stripping tower body 1 through the wide channel 38, it can be in a jet state. The narrow channel 37 can accelerate the liquid flow and generate a higher flow rate. This acceleration effect is similar to a nozzle. When the liquid enters the wide channel 38 from the narrow channel 37, a jet effect is formed. After the liquid sprays out from the narrow channel 37, it enters the wide channel 38, the flow rate decreases, the fluid spreads out, and the sprayed liquid covers a larger area.

[0064] Based on the cyclopropylamine liquid being sprayed from the side outlet 36, multiple spaced-apart flow dividers 39 are also provided at the outlet 32 ​​of the side outlet 36. The gap between every two flow dividers 39 is used to discharge the cyclopropylamine liquid. By setting the flow dividers 39, the sprayed liquid is further dispersed and dispersed, making the liquid flow more uniform, which helps to achieve a more uniform distribution on the packing layer. The flow dividers 39 can adjust the flow direction and distribution pattern of the liquid, thereby improving the contact efficiency between the liquid and the steam and optimizing the mass transfer and heat transfer process.

[0065] In addition, the multiple packing layers inside the stripping tower body 1 are divided into two parts, with the center of the stripping tower body 1 as the boundary. The packing layer above the center is set as a thick packing layer 7, and the packing layer below the center is set as a sparse packing layer 8. The upper half of the packing layer is thicker, providing a larger contact area, which helps with the initial separation of materials. The lower half of the packing layer is sparser, preventing accumulation and blockage, and ensuring the smooth operation of the entire system. The thick packing layer can be stainless steel wire mesh packing, and the sparse packing layer can be metal corrugated packing. However, the packing layer used is not limited to these, as long as the packing layer at the bottom is sparser than the packing layer at the top.

[0066] The specific embodiments described above further illustrate the technical problems, technical solutions, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A cyclopropylamine stripping tower, characterized in that: include: The stripping tower body (1) is provided with several spaced packing layers. A liquid inlet pipe (3) is provided above the top packing layer. The liquid inlet pipe (3) is divided into an inlet (31) and an outlet (32). The inlet (31) is located outside the stripping tower, and the outlet (32) is located inside the stripping tower. An air inlet pipe (2) is provided below the bottom packing layer. A liquid outlet pipe (5) is provided at the bottom of the stripping tower, and an air outlet pipe (4) is provided at the top of the stripping tower. An exhaust plate (6) is provided between each two packing layers. The exhaust plate (6) includes a turntable (61) rotatably installed in the stripping tower, a fixed plate (62) fixedly installed in the stripping tower, and a driving component. The turntable (61) is rotatably mounted on the fixed disk (62). Both the turntable (61) and the fixed disk (62) have corresponding through holes. The through slots on the turntable (61) and the fixed disk (62) are connected to form an airflow channel. The driving component is adapted to be connected to the turntable (61) to drive the turntable (61) to rotate on the fixed disk (62), so that the positions of the corresponding through slots on the turntable (61) and the fixed disk (62) are staggered, thereby changing the size of the airflow channel.

2. The cyclopropylamine stripping tower according to claim 1, characterized in that, The exhaust plate (6) also includes a fixing sleeve (64), the outer peripheral surface of which is connected to the inner wall of the stripping tower, the fixing plate (62) is fixedly connected inside the fixing sleeve (64), and the turntable (61) is rotatably installed inside the fixing sleeve (64).

3. The cyclopropylamine stripping tower according to claim 2, characterized in that, A rotating sleeve (63) is connected to the outer circumferential surface of the turntable (61). A rotating groove is provided on the inner wall of the fixed sleeve (64) at a position corresponding to the rotating sleeve (63). The rotating sleeve (63) is rotatably connected in the rotating groove.

4. The cyclopropylamine stripping tower according to claim 3, characterized in that, The driving component includes a driving device (68), a driven bevel gear (66) and a driving bevel gear (67). An annular groove is provided on the side of the turntable (61) that contacts the fixed disc (62). The driven bevel gear (66) is fixedly connected in the annular groove. A rotating cavity is provided on the side of the fixed disk (62) that contacts the turntable (61). The driving bevel gear (67) is rotatably installed in the rotating cavity. The rotating cavity is connected to the annular groove. The driving bevel gear (67) meshes with the driven bevel gear (66). The output shaft of the drive device (68) is connected to the active bevel gear (67) to drive the active bevel gear (67) to rotate, thereby driving the driven bevel gear (66) to rotate, and then driving the turntable (61) to rotate.

5. The cyclopropylamine stripping tower according to claim 4, characterized in that, The exhaust plate (6) also includes a sealing sleeve (65), the sealing sleeve (65) and the fixing sleeve (64) are provided on the outer peripheral surface of the stripping tower, the driving device (68) is installed on one side of the sealing sleeve (65), the output shaft of the driving device (68) passes through the sealing sleeve (65), the stripping tower and the fixing sleeve (64) to the rotating cavity, and is connected to the driving bevel gear (67); The output shaft of the drive device (68) is connected to the sealing sleeve (65) by a rotary seal.

6. The cyclopropylamine stripping tower according to claim 1, characterized in that, The outlet (32) of the liquid inlet pipe (3) is a straight pipe (33) extending into the stripping tower. The straight pipe (33) is connected to the inlet (31) located outside the stripping tower. A straight outlet hole (35) is opened at the bottom of the straight pipe (33), and the straight outlet hole (35) communicates with the inner cavity of the straight pipe (33).

7. The cyclopropylamine stripping tower according to claim 6, characterized in that, Both sides of the straight pipe (33) are connected to bends (34). The inner cavity of the bend (34) is in communication with the inner cavity of the straight pipe (33). A side outlet (36) is provided on the side of the bend (34) facing the straight pipe (33). The side outlet (36) is in communication with the inner cavity of the bend (34).

8. The cyclopropylamine stripping tower according to claim 7, characterized in that, The side outlet (36) is divided into two parts: a narrow channel (37) and a wide channel (38). The narrow channel (37) is connected to the inner cavity of the bend (34), and the wide channel (38) is connected to the narrow channel (37). The wide channel (38) communicates with the internal space of the stripping tower.

9. The cyclopropylamine stripping tower according to claim 8, characterized in that, Several spaced diversion plates (39) are provided on the surface of the channel (38) that communicates with the internal space of the stripping tower.

10. The cyclopropylamine stripping tower according to any one of claims 1-9, characterized in that, The packing layers are divided into a thick packing layer (7) and a sparse packing layer (8) with the middle position of the stripping tower body (1) as the boundary. The packing layer located above is the thick packing layer (7), and the packing layer located below is the sparse packing layer (8).

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