Condenser for recycling diisopropylamine

Abstract

A cooling medium inlet is formed in an upper cover, a cooling medium outlet is formed in one side of the lower portion of a tank body, a steam inlet is formed in one side of the upper portion of the tank body, a material outlet is formed in the lower surface of a lower cover, and a plurality of heat exchange plates are arranged in the tank body. Every two adjacent heat exchange plates are connected through a plurality of supporting rods and a connecting pipe, the interiors of the heat exchange plates are each of a hollow structure, every two adjacent heat exchange plates communicate with each other through the connecting pipe, flow channels are formed in the heat exchange plates in the axial direction, and a straight pipe is arranged in the center of the heat exchange plate located at the top end. And the top end of the straight pipe is inserted and welded with the cooling medium inlet, a bent pipe is arranged at the central position of the heat exchange plate positioned at the bottom end, and the outer end of the bent pipe is welded with the cooling medium outlet. Therefore, the heat exchange effect with diisopropylamine steam is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of condensation equipment technology, specifically a condenser for diisopropylamine recovery. Background Technology

[0002] Diisopropylamine is an organic compound with the chemical formula C6H15N and a molecular weight of approximately 101.19. It is usually a colorless, volatile liquid with an ammonia odor; its relative density is 0.72 (20℃), freezing point is -96.3℃, boiling point is 83~84℃, flash point is -1.1℃ (open cup), autoignition point is 402.2℃, and refractive index is 1.3924; it is slightly soluble in water and soluble in organic solvents.

[0003] In the production process of atorvastatin calcium intermediate A8, diisopropylamine vapor is obtained through a distillation column. In order to recover diisopropylamine, it is generally condensed by a condenser. Currently, the condensers used for diisopropylamine recovery generally adopt a coil structure. The coil path is relatively short, which affects the condensation effect. Therefore, there is an urgent need for an improved technology to solve this problem in the existing technology. Utility Model Content

[0004] The purpose of this invention is to provide a condenser for diisopropylamine recovery to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a condenser for diisopropylamine recovery, comprising a tank, a lower cover, an upper cover, heat exchange plates, connecting pipes, support rods, straight pipes, and bent pipes. The upper cover is provided at the top of the tank, and the lower cover is provided at the bottom of the tank. The upper cover is provided with a cooling medium inlet, and the lower side of the tank is provided with a cooling medium outlet. The upper side of the tank is provided with a steam inlet, and the lower surface of the lower cover is provided with a material outlet. Several heat exchange plates are provided inside the tank. Adjacent heat exchange plates are connected by several support rods and a connecting pipe. The heat exchange plates are all hollow. Adjacent heat exchange plates are interconnected by connecting pipes. Two adjacent connecting pipes in the height direction are alternately arranged left and right. The heat exchange plates have flow channels along the axial direction. A straight pipe is provided at the center of the heat exchange plate at the top. The top end of the straight pipe is inserted into and welded to the cooling medium inlet. A bent pipe is provided at the center of the heat exchange plate at the bottom. The outer end of the bent pipe is welded to the cooling medium outlet.

[0006] Preferably, the present invention provides a condenser for diisopropylamine recovery, wherein a support ring is provided on the inner wall of the lower part of the tank, and the heat exchange plate at the bottom end is supported on the upper surface of the support ring.

[0007] Preferably, the present invention provides a condenser for diisopropylamine recovery, wherein the outer surface of the tank is provided with several support seats.

[0008] Preferably, the condenser for diisopropylamine recovery provided by this utility model has flow channels on two adjacent heat exchange plates arranged alternately.

[0009] Compared with the prior art, the beneficial effects of this utility model are:

[0010] The tank is equipped with several hollow heat exchange plates, and adjacent heat exchange plates are interconnected by connecting pipes. The cooling medium fills each heat exchange plate sequentially through the left and right alternately arranged connecting pipes. After diisopropylamine vapor enters the tank, it exchanges heat with the cooling medium inside the heat exchange plates and condenses to obtain diisopropylamine liquid. The tank is uniformly equipped with multiple layers of heat exchange plates, and the left and right alternately arranged connecting pipes can ensure that the cooling medium completely fills each heat exchange plate, thereby greatly improving the heat exchange effect with diisopropylamine vapor. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the cross-sectional structure of the present invention;

[0012] Figure 2 This is a top view of the heat exchanger structure.

[0013] Figure 3 This is a schematic diagram of the appearance and structure of this utility model.

[0014] In the diagram: 1. Tank body; 2. Lower cover; 3. Upper cover; 4. Heat exchange plate; 5. Connecting pipe; 6. Support rod; 7. Straight pipe; 8. Bend; 9. Cooling medium inlet; 10. Cooling medium outlet; 11. Steam inlet; 12. Material outlet; 13. Flow channel; 14. Support ring; 15. Support base. Detailed Implementation

[0015] The technical solution of this 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 this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0016] It should be noted that in the description of this utility model, the terms "inner", "outer", "upper", "lower", "both sides", "one end", "the other end", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0017] Please see Figure 1-3 This utility model provides a technical solution: a condenser for diisopropylamine recovery, comprising a tank 1, a lower cover 2, an upper cover 3, heat exchange plates 4, a connecting pipe 5, support rods 6, a straight pipe 7, and a bent pipe 8. The upper cover 3 is located at the top of the tank 1, and the lower cover 2 is located at the bottom of the tank 1. The upper cover 3 has a cooling medium inlet 9, and a cooling medium outlet 10 is located on one side of the lower part of the tank 1. The cooling medium inlet 9 and the cooling medium outlet 10 are used for the entry and exit of the cooling medium, respectively. A steam inlet 11 is located on one side of the upper part of the tank 1, for the entry of diisopropylamine vapor after distillation. A material outlet 12 is located on the lower surface of the lower cover 2 for the discharge of liquid material after the diisopropylamine vapor condenses. Several heat exchange plates 4 are arranged inside the tank 1, and adjacent heat exchange plates 4 are connected by several support rods 6 and a connecting pipe 5. The heat exchange plates 4 are all hollow, and the hollow structure is used to achieve cooling medium... The heat exchanger 4 flows inside the heat exchanger plate 4. Two adjacent heat exchanger plates 4 are connected to each other by connecting pipes 5. Two adjacent connecting pipes 5 in the height direction are alternately arranged on the left and right. The heat exchanger plate 4 has flow channels 13 opened along the axial direction. The flow channels 13 opened by two adjacent heat exchanger plates 4 are staggered to improve the movement path of diisopropylamine vapor, thereby ensuring the heat exchange effect with the cooling medium. A straight pipe 7 is set at the center of the heat exchanger plate 4 at the top. The top end of the straight pipe 7 is inserted and welded to the cooling medium inlet 9. A bent pipe 8 is set at the center of the heat exchanger plate 4 at the bottom. The outer end of the bent pipe 8 is welded to the cooling medium outlet 10. A support ring 14 is set on the inner wall of the lower part of the tank body 1. The bottom heat exchanger plate 4 is supported on the upper surface of the support ring 14. The support ring 14 is used to support the heat exchanger plate 4. Several support seats 15 are set on the outer surface of the tank body 1 to realize the installation and fixation of the tank body 1.

[0018] Processing method and operating principle: First, connect two heat exchange plates 4 together with several support rods 6 and a connecting pipe 5. Adjacent heat exchange plates 4 are interconnected through the connecting pipe 5, and the upper and lower adjacent connecting pipes 5 are arranged alternately left and right to improve the path of the cooling medium. Simultaneously, the flow channels 13 of adjacent heat exchange plates 4 are located on the left and right sides of the axis, similarly improving the flow path of diisopropylamine vapor and thus enhancing the heat exchange effect. Next, insert the assembled heat exchange plate 4 assembly into the tank body 1, with the bottom heat exchange plate 4 supported on the support ring 14. Then, weld the straight pipe 7 to the center of the top heat exchange plate 4, weld the bent pipe 8 to the center of the bottom heat exchange plate 4, and weld the outer end of the bent pipe 8 to the cooling medium outlet 10. Connect and weld the lower cover 2 to the bottom of the tank body 1, connect the upper cover 3 to the top of the tank body 1, and allow the straight pipe 7 to pass through the cooling medium inlet 9. Simultaneously, weld the straight pipe 7 to the cooling medium inlet 9, and weld the upper cover 3 to the tank body 1, completing the assembly and processing. In operation, the steam inlet 11 is connected to the distillation tower via a pipeline, the material outlet 12 is connected to the discharge pipeline, and the cooling medium inlet 9 and cooling medium outlet 10 are respectively connected to the cooling medium circulation pipeline, which can be a refrigeration system. Diisopropylamine vapor enters the tank 1 through the steam inlet 11, and the cooling medium enters through the cooling medium inlet 9, and then enters the inner cavity of the heat exchange plate 4 through the straight pipe 7. Subsequently, it enters the inner cavity of each heat exchange plate 4 through the connecting pipe 5, and finally exits from the bottom bend pipe 8 and the cooling medium outlet 10. The diisopropylamine vapor exchanges heat with the cooling medium in each heat exchange plate 4 inside the tank 1. After condensing into water, it moves downward through the flow channel 13 of each heat exchange plate 4, and finally exits and is collected from the material outlet 12 of the lower cover 2. This utility model has a reasonable structure. The tank body 1 is equipped with several hollow heat exchange plates 4, and adjacent heat exchange plates 4 are interconnected by connecting pipes 5. The cooling medium fills each heat exchange plate 4 sequentially through the left and right alternately arranged connecting pipes 5. After diisopropylamine vapor enters the tank body 1, it exchanges heat with the cooling medium inside the heat exchange plate 4 and condenses to obtain diisopropylamine liquid. The tank body 1 is uniformly equipped with multiple layers of heat exchange plates 4, and the left and right alternately arranged connecting pipes 5 can make the cooling medium completely fill each heat exchange plate 4, thereby greatly improving the heat exchange effect with diisopropylamine vapor.

[0019] Any aspects of this utility model not described in detail are well-known technologies to those skilled in the art.

[0020] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to the embodiments, those skilled in the art should understand that modifications and equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A condenser for diisopropylamine recovery, characterized in that: The tank includes a tank body (1), a lower cover (2), an upper cover (3), heat exchange plates (4), connecting pipes (5), support rods (6), straight pipes (7), and bent pipes (8). The upper cover (3) is provided at the top of the tank body (1), and the lower cover (2) is provided at the bottom of the tank body (1). The upper cover (3) is provided with a cooling medium inlet (9). The lower side of the tank body (1) is provided with a cooling medium outlet (10), and the upper side of the tank body (1) is provided with a steam inlet (11). The lower surface of the lower cover (2) is provided with a material outlet (12). Several heat exchange plates (4) are provided inside the tank body (1). Between two adjacent heat exchange plates (4) The heat exchange plates (4) are connected by several support rods (6) and a connecting pipe (5). The interior of each heat exchange plate (4) is hollow. Two adjacent heat exchange plates (4) are connected to each other by a connecting pipe (5). Two adjacent connecting pipes (5) are alternately arranged on the left and right sides in the height direction. The heat exchange plates (4) have flow channels (13) along the axial direction. A straight pipe (7) is provided at the center of the heat exchange plate (4) at the top. The top of the straight pipe (7) is inserted into and welded to the cooling medium inlet (9). A bent pipe (8) is provided at the center of the heat exchange plate (4) at the bottom. The outer end of the bent pipe (8) is welded to the cooling medium outlet (10).

2. A condenser for diisopropylamine recovery according to claim 1, characterized in that: The inner wall of the lower part of the tank (1) is provided with a support ring (14), and the heat exchange plate (4) at the bottom is supported on the upper surface of the support ring (14).

3. A condenser for diisopropylamine recovery according to claim 1, characterized in that: The outer surface of the tank (1) is provided with several support seats (15).

4. A condenser for diisopropylamine recovery according to claim 1, characterized in that: The flow channels (13) of the two adjacent heat exchange plates (4) are staggered from left to right.

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