An esterification kettle condenser

Abstract

The utility model relates to an esterification kettle condenser belongs to the technical field of condensing equipment, including condenser shell, raw material storage tank, the outside of raw material storage tank is equipped with preheating jacket, and the condenser shell includes two end head boards, and the both end head boards are connected with condensing cylinder through flange, and the upper and lower end inner walls of condensing cylinder are fixed with upper hole plate and lower hole plate respectively, and the lower part of upper hole plate is equipped with middle hole plate, and the upper hole plate is equipped with condensing pipe, and condensing pipe is covered with condensing outer sleeve pipe, and the bottom of lower part's end head board is equipped with condensing liquid outlet pipe, and the middle of lower hole plate is equipped with exhaust pipe, and the upper end head board is equipped with cloth gas pipe of connecting exhaust pipe, and the condensing cylinder is equipped with cooling water inlet pipe, and the condensing cylinder below middle hole plate is equipped with cooling water outlet pipe of connecting preheating import. The utility model increases the retention time of steam in the condenser, increases the condensing effect, and the heat recovery use of the heat energy of the cooling water after heat exchange can be carried out through the cooling water outlet pipe and be input into the preheating import of preheating jacket, saves the energy source.

Description

Technical Field

[0001] This utility model belongs to the field of condensation equipment technology, specifically relating to an esterification kettle condenser. Background Technology

[0002] During the esterification reaction, the vapor generated in the esterification reactor needs to be condensed into a liquid by a condenser for subsequent processing and separation. For example, during the esterification reaction of methyl anthranilate, unreacted methanol vapor is produced. The condenser uses a shell-and-tube structure to achieve heat exchange, condensing the gaseous substance into a liquid state for easy collection and separation. The uncondensed gas is discharged through a top pipe to avoid pressure buildup. Existing esterification reactor condensers have several problems in use: firstly, the gas stays in the condenser for a short time, affecting the condensation effect; secondly, the large amount of heat energy released during steam condensation is not effectively utilized, resulting in energy waste and increased production costs. Utility Model Content

[0003] Therefore, it is necessary to provide an esterification reactor condenser to address the problems of the existing technology.

[0004] To solve the problems of the existing technology, the technical solution adopted by this utility model is as follows: A condenser for an esterification reactor includes a condenser shell connected to a top outlet pipe of the esterification reactor. A raw material storage tank is located beside the esterification reactor. A preheating jacket is provided outside the raw material storage tank. A preheating inlet is provided at the bottom of the preheating jacket, and a preheating outlet is provided at the top of the preheating jacket. The condenser shell includes upper and lower end plates, and a condensing cylinder is connected between the two end plates by a flange. An upper orifice plate and a lower orifice plate are respectively fixed on the inner walls of the upper and lower ends of the condensing cylinder. A middle orifice plate is provided at the bottom of the upper orifice plate. A plurality of condensing tubes are evenly arranged on the upper orifice plate, and the bottom of the condensing tubes is connected to the lower orifice plate. Each condenser tube is fixed with a condenser outer sleeve. The top of the condenser outer sleeve is fixed to the middle orifice plate, and the lower part of the condenser outer sleeve extends to the upper area of ​​the lower orifice plate. The bottom of the lower end plate is provided with a condensate outlet pipe, and the middle of the lower orifice plate is provided with an exhaust pipe. The upper end of the exhaust pipe passes through the middle orifice plate and the upper orifice plate and exits from the upper end plate. The upper end plate is provided with a gas distribution pipe connected to the exhaust pipe. The condenser cylinder between the upper orifice plate and the middle orifice plate is provided with a cooling water inlet pipe, and the condenser cylinder below the middle orifice plate is provided with a cooling water outlet pipe connected to the preheating inlet.

[0005] As a preferred embodiment, the bottom of the gas distribution pipe is connected to the top center of the upper end plate. The exhaust pipe passes through the center of the gas distribution pipe and then exits from the elbow. A conical gas distribution plate is provided directly below the outlet of the gas distribution pipe. The gas distribution plate is evenly provided with gas distribution holes. The gas distribution plate can evenly distribute the steam entering the gas distribution pipe and increase the effect of condensation heat exchange.

[0006] As a preferred embodiment, a gap is provided between the middle of the air distribution plate and the exhaust pipe to facilitate the installation of the air distribution plate and the exhaust pipe. A supporting flange is provided on the outer side of the air distribution plate, and a supporting groove is provided at the bottom of the upper end plate to cooperate with the supporting flange. A pressing boss is provided on the top of the condenser cylinder to press the supporting flange into the supporting groove, which can facilitate pressing the air distribution plate.

[0007] As a preferred embodiment, a sealing recess is provided on the outer side of the pressing boss, and a sealing gasket is provided inside the sealing recess. A sealing boss is provided on the upper end plate corresponding to the sealing gasket, thereby increasing the sealing effect between the upper end plate and the condenser cylinder.

[0008] As a preferred option, a corrugated section is provided at the end of the air outlet pipe near the air distribution pipe to facilitate the installation and removal of the upper end plate.

[0009] As a preferred embodiment, the condenser body includes an upper condenser body and a lower condenser body connected by a flange. An upper orifice plate is fixed on the upper inner wall of the upper condenser body, and a middle orifice plate is fixed on the upper inner wall of the lower condenser body, which facilitates the installation and fixing of the condenser pipe and the condenser jacket pipe.

[0010] As a preferred embodiment, guide plates are staggered vertically on the lower condenser cylinder between the middle and lower orifice plates, with the bottom end of the condenser jacket tube located below the lowest guide plate, which can guide the cooling water and increase the condensation effect.

[0011] As a preferred option, a reinforcing ring plate is welded and fixed to the outer wall of the condenser cylinder, and multiple support legs are evenly fixed to the outer side of the reinforcing ring plate, making the structure more stable. The preheating inlet is connected to a cold water inlet pipe, and a temperature sensor is installed inside the raw material storage tank, which can better control the temperature inside the raw material storage tank.

[0012] The advantages of this utility model compared with the prior art are: The steam discharged from the outlet pipe passes through the upper end plate and then enters the condenser tube. Inside the condenser tube, it exchanges heat with the cooling water entering the condenser jacket through the cooling water inlet pipe. Then, the gas and condensate enter the lower end plate, where the condensate remains. The gas then passes through the exhaust pipe and exchanges heat with the cooling water again before being discharged. This increases the residence time of the steam in the condenser, improving the condensation effect. Furthermore, the cooled water after heat exchange can be fed into the preheating inlet of the preheating jacket through the cooling water outlet pipe for heat recovery and reuse, saving energy. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 yes Figure 1 Partial structural diagram; Figure 3 yes Figure 2Partial structural diagram Figure 1 ; Figure 4 yes Figure 2 Partial structural diagram Figure 2 ; Figure 5 yes Figure 2 Partial structural diagram Figure 3 ; The numbers on the map are: 1. Esterification reactor; 2. Gas outlet pipe; 3. Raw material storage tank; 4. Preheating jacket; 5. Cold water inlet pipe; 6. Cooling water outlet pipe; 7. Gas distribution pipe; 8. Exhaust pipe; 9. End plate; 10. Upper orifice plate; 11. Middle orifice plate; 12. Condenser pipe; 13. Condenser outer jacket pipe; 14. Lower orifice plate; 15. Condensate outlet pipe; 16. Lower condenser cylinder; 17. Guide plate; 18. Upper condenser cylinder; 19. Bellows; 20. Gas distribution plate; 21. Support flange; 22. Cooling water inlet pipe; 23. Support leg; 24. Reinforcing ring plate; 25. Sealing gasket. Detailed Implementation

[0014] To further understand the features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments.

[0015] Example 1, Reference Figures 1 to 5 A condenser for an esterification reactor includes a condenser shell connected to a top outlet pipe 2 of an esterification reactor 1. A raw material storage tank 3 is located beside the esterification reactor 1. A preheating jacket 4 is located outside the raw material storage tank 3. A preheating inlet is located at the bottom of the preheating jacket 4, and a preheating outlet is located at the top of the preheating jacket 4. The condenser shell includes upper and lower end plates 9. A condensing cylinder is connected between the two end plates 9 by a flange. An upper perforated plate 10 and a lower perforated plate 14 are respectively fixed on the inner walls of the upper and lower ends of the condensing cylinder. A middle perforated plate 11 is located at the lower part of the upper perforated plate 10. A plurality of condensing tubes 12 are evenly arranged on the upper perforated plate 10. The bottom of the condensing tubes 12 is fixed to the lower perforated plate 14. Each condenser tube 12 is covered with a condenser outer sleeve 13. The top of the condenser outer sleeve 13 is fixed to the middle perforated plate 11. The lower part of the condenser outer sleeve 13 extends to the upper area of ​​the lower perforated plate 14. The bottom of the lower end plate 9 is provided with a condensate outlet pipe 15. The middle of the lower perforated plate 14 is provided with an exhaust pipe 8. The upper end of the exhaust pipe 8 passes through the middle perforated plate 11 and the upper perforated plate 10 and exits from the upper end plate 9. The upper end plate 9 is provided with a gas distribution pipe 7 connected to the exhaust pipe 2. The condenser cylinder between the upper perforated plate 10 and the middle perforated plate 11 is provided with a cooling water inlet pipe 22. The condenser cylinder below the middle perforated plate 11 is provided with a cooling water outlet pipe 6 connected to the preheating inlet.

[0016] During operation, the steam generated by the esterification reactor 1 enters the condenser shell through the outlet pipe 2, and is then distributed in multiple condenser pipes 12 within the upper end plate 9. During the transport process, it first undergoes heat exchange and condensation with the cooling water entering the area between the upper orifice plate 10 and the middle orifice plate 11 through the cooling water inlet pipe 22. Then, it undergoes a second heat exchange and condensation with the cooling water entering the condenser jacket 13 when passing through a section covered by the condenser jacket 13. In the lower area, it undergoes heat exchange and condensation with the cooling water above the lower orifice plate 14. The steam and the condensed liquid then enter the lower end plate 9, where the condensate remains. The uncondensed gas enters the exhaust pipe 8, and as it flows upward through the exhaust pipe 8, it undergoes four heat exchange and condensation processes with the cooling water before being discharged from the condenser shell. The cooled water after heat exchange enters the preheating jacket 4 through the cooling water outlet pipe 6 to preheat the raw materials in the raw material storage tank 3. The valve on the condensate outlet pipe 15 can be opened periodically to discharge the condensate.

[0017] In Example 2, based on Example 1, the bottom of the gas distribution pipe 7 is connected to the top center of the upper end plate 9. The exhaust pipe 8 passes through the center of the gas distribution pipe 7 and exits from the bend. A conical gas distribution plate 20 is provided directly below the outlet of the gas distribution pipe 7, and the gas distribution plate 20 has evenly distributed gas distribution holes. The steam generated by the esterification reactor 1 enters the gas distribution pipe 7 through the exhaust pipe 2, and then is blown to the top center of the gas distribution plate 20. The gas distribution plate 20 evenly distributes the incoming steam, and then it enters the multiple condenser tubes 12 more evenly.

[0018] A gap is provided between the middle of the air distribution plate 20 and the exhaust pipe 8. A support flange 21 is provided on the outer side of the air distribution plate 20. The bottom of the upper end plate 9 is provided with a support groove that mates with the support flange 21. The top of the condenser cylinder is provided with a pressing boss that presses the support flange 21 into the support groove. During installation, the support flange 21 of the air distribution plate 20 is inserted into the support groove. When the upper end plate 9 is closed, the pressing boss presses the support flange 21 into the support groove.

[0019] A sealing recess is provided on the outer side of the pressing boss, and a sealing gasket 25 is provided inside the sealing recess. A sealing boss is provided on the upper end plate 9 corresponding to the sealing gasket 25.

[0020] A section of corrugated pipe 19 is provided at one end of the air outlet pipe 2 near the air distribution pipe 7. The upper orifice plate 10, the middle orifice plate 11 and the lower orifice plate 14 are all provided with through holes to support the exhaust pipe 8. The inner wall of the through hole is provided with an annular sealing groove, and a sealing ring is provided in the sealing groove.

[0021] The condenser body includes an upper condenser body 18 and a lower condenser body 16 connected by flanges. An upper orifice plate 10 is fixed to the upper inner wall of the upper condenser body 18, and a middle orifice plate 11 is fixed to the upper inner wall of the lower condenser body 16. The entire condenser body can be manufactured in sections and then connected by flanges.

[0022] A guide plate 17 is staggered vertically along the lower condenser cylinder 16 between the middle orifice plate 11 and the lower orifice plate 14. The bottom end of the condenser outer jacket 13 is located below the lowermost guide plate 17. Cooling water is pumped in from the cooling water inlet pipe 22 by the cooling water pump, and then flows through the gap between the condenser outer jacket 13 and the condenser pipe 12 to the lower part of the lowermost guide plate 17. As the amount of cooling water increases, the cooling water flows in a serpentine pattern between the middle orifice plate 11 and the lower orifice plate 14, and then is discharged through the cooling water outlet pipe 6.

[0023] A reinforcing ring plate 24 is welded and fixed on the outer wall of the condenser cylinder. Multiple support legs 23 are evenly fixed on the outer side of the reinforcing ring plate 24. A cold water inlet pipe 5 is connected to the preheating inlet. A temperature sensor is installed inside the raw material storage tank 3. The temperature sensor is connected to a controller. Flow regulating valves connected to the controller are installed on both the cold water inlet pipe 5 and the cooling water outlet pipe 6, which can control the temperature inside the raw material storage tank 3.

[0024] The above embodiments only illustrate one or more implementations of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A condenser for an esterification reactor, comprising a condenser shell connected to a top outlet pipe (2) of an esterification reactor (1), and a raw material storage tank (3) provided beside the esterification reactor (1), characterized in that: The raw material storage tank (3) is provided with a preheating jacket (4) on the outside. The preheating jacket (4) is provided with a preheating inlet at the bottom and a preheating outlet at the top. The condenser shell includes two end plates (9) and a condensing cylinder is connected between the two end plates (9) by a flange. An upper orifice plate (10) and a lower orifice plate (14) are fixed on the inner walls of the upper and lower ends of the condensing cylinder, respectively. A middle orifice plate (11) is provided at the bottom of the upper orifice plate (10). Multiple condensing tubes (12) are evenly arranged on the upper orifice plate (10). The bottom of the condensing tubes (12) is fixed to the lower orifice plate (14). Each condensing tube (12) is fitted with a condensing outer sleeve (13). 3) The top is fixed to the middle perforated plate (11). The lower part of the condenser jacket (13) extends to the upper area of ​​the lower perforated plate (14). The bottom of the lower end plate (9) is provided with a condensate outlet pipe (15). The middle of the lower perforated plate (14) is provided with an exhaust pipe (8). The upper end of the exhaust pipe (8) passes through the middle perforated plate (11) and the upper perforated plate (10) and exits from the upper end plate (9). The upper end plate (9) is provided with a gas distribution pipe (7) connected to the gas outlet pipe (2). The condenser cylinder between the upper perforated plate (10) and the middle perforated plate (11) is provided with a cooling water inlet pipe (22). The condenser cylinder below the middle perforated plate (11) is provided with a cooling water outlet pipe (6) connected to the preheating inlet.

2. The condenser for an esterification reactor according to claim 1, characterized in that, The bottom of the air distribution pipe (7) is connected to the top middle position of the upper end plate (9). The exhaust pipe (8) passes through the center of the air distribution pipe (7) and then exits from the bend. A conical air distribution plate (20) is provided directly below the outlet of the air distribution pipe (7). Air distribution holes are evenly distributed on the air distribution plate (20).

3. The condenser for an esterification reactor according to claim 2, characterized in that, A gap is provided between the middle of the air distribution plate (20) and the exhaust pipe (8). A support flange (21) is provided on the outer side of the air distribution plate (20). The bottom of the upper end plate (9) is provided with a support groove that cooperates with the support flange (21). The top of the condenser cylinder is provided with a pressing boss that presses the support flange (21) into the support groove.

4. The condenser for an esterification reactor according to claim 3, characterized in that, A sealing recess is provided on the outside of the pressing boss, and a sealing gasket (25) is provided inside the sealing recess. A sealing boss is provided on the upper end plate (9) corresponding to the sealing gasket (25).

5. The condenser for an esterification reactor according to claim 2, characterized in that, A section of corrugated pipe (19) is provided at one end of the air outlet pipe (2) near the air distribution pipe (7).

6. The condenser for an esterification reactor according to claim 3, characterized in that, The condenser body includes an upper condenser body (18) and a lower condenser body (16) connected by a flange. An upper orifice plate (10) is fixed on the upper inner wall of the upper condenser body (18), and a middle orifice plate (11) is fixed on the upper inner wall of the lower condenser body (16).

7. The condenser for an esterification reactor according to claim 6, characterized in that, The lower condenser cylinder (16) between the middle orifice plate (11) and the lower orifice plate (14) is provided with guide plates (17) staggered in the vertical direction, and the bottom end of the condenser outer tube (13) is below the lowest guide plate (17).

8. The condenser for an esterification reactor according to claim 1, characterized in that, A reinforcing ring plate (24) is welded and fixed on the outer wall of the condenser cylinder. Multiple support legs (23) are evenly fixed on the outer side of the reinforcing ring plate (24). A cold water inlet pipe (5) is connected to the preheating inlet. A temperature sensor is installed inside the raw material storage tank (3).

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