A regenerator for esterification reaction catalyst

Abstract

The utility model discloses a regenerator for esterification reaction catalyst, which relates to the technical field of catalyst regeneration, and comprises a bracket, a reaction vessel arranged on the bracket, and a steam heating jacket sleeved on the outside of a sealing groove, wherein a sampling port is arranged on the reaction vessel, a gate valve is arranged on the sampling port, a feed port of the gate valve is connected with the reaction vessel through the sampling port, a connecting pipe is arranged on the gate valve, a sampling tank is threadedly connected on the connecting pipe, the sampling tank is connected with the discharge port of the gate valve through the connecting pipe, and a sealing component is arranged between the sampling tank and the connecting pipe. The utility model can make it unnecessary to increase the pressure in the reaction vessel or to cool down the steam heating jacket during sampling, and at the same time, the closing of the gate valve can ensure the sealing between the reaction vessel and the outside world, so that sampling can be made more convenient, quick and easy to operate, and the purpose of multiple sealing between the sampling tank and the reaction vessel is achieved, so as to ensure the normal and orderly progress of the regeneration work.

Description

Technical Field

[0001] The utility model relates to the technical field of catalyst regeneration, in particular to a regenerator for an esterification reaction catalyst. Background Art

[0002] Esterification is a type of organic chemical reaction, mainly the reaction of alcohol with carboxylic acid or inorganic oxygen-containing acid to generate ester and water. It is divided into three categories: the reaction of carboxylic acid with alcohol, the reaction of inorganic oxygen-containing acid with alcohol, and the reaction of inorganic strong acid with alcohol. The esterification reaction of carboxylic acid with alcohol is reversible and generally reacts very slowly, so a catalyst is used in the reaction. Among them, zeolite molecular sieve is a commonly used catalyst in esterification reaction. Zeolite molecular sieve is insoluble in the reaction system during the reaction and belongs to a multiphase catalytic reaction. After the reaction is completed, the catalyst can be recovered and a clean liquid reaction product can be obtained by simple treatment and regeneration, which can greatly simplify the post-treatment and refining operation of the product, and there is no waste liquid to pollute the environment. On the other hand, the recovered solid catalyst can be directly reused or reused in the same organic reaction after proper treatment, which can reduce costs, avoid side reactions, obtain highly selective target products, and there is no corrosion to equipment and chemical pipelines. Obviously, the combined effect of the many advantages of zeolite molecular sieves not only reduces the cost of the product and improves economic benefits, but also avoids environmental pollution. Therefore, zeolite molecular sieves are also called environmentally friendly catalysts.

[0003] The molecular sieve regeneration reactor disclosed in the prior art CN 218012776 U includes a container body, a steam heating jacket, a rotating shaft, a supporting frame, a rotating device, an inlet and outlet, a vacuum port, a steam inlet, and a steam outlet. Although the regeneration reactor can make the molecular sieve reusable, the qualified rate of the regenerated molecular sieve is high, it is not easy to pollute the environment, and the operation is simple, and the molecular sieve regeneration can be completed in batches, which effectively reduces the production cost. However, the utility model samples the internal molecular sieve through the inlet and outlet, so the inlet and outlet need to be opened when sampling, and therefore the reactor needs to be cooled and the pressure restored to a certain extent. When it is unqualified after analysis, it needs to be reheated and vacuumed before continuing the regeneration process. This will not only make the sampling work very cumbersome and complicated, but also cause a significant impact on the efficiency of the regeneration reaction, which is not conducive to the regeneration processing of the molecular sieve. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies of the prior art, the utility model provides a regenerator for an esterification reaction catalyst, which solves the problems raised in the above background technology.

[0006] (II) Technical solution

[0007] To achieve the above objectives, the utility model is implemented through the following technical solutions: a regenerator for an esterification reaction catalyst, comprising a bracket, a reaction vessel arranged on the bracket and a steam heating jacket sleeved on the outside of a sealing groove, the reaction vessel is provided with a sampling port, the sampling port is provided with a gate valve, the feed port of the gate valve is connected with the reaction vessel through the sampling port, the gate valve is provided with a connecting pipe, the connecting pipe is threadedly connected with a sampling tank, the sampling tank is connected with the discharge port of the gate valve through the connecting pipe, and a sealing component is provided between the sampling tank and the connecting pipe.

[0008] Optionally, the sealing assembly includes a sealing gasket, an end sealing ring and an outer sealing ring, the sealing gasket is arranged at one end of the connecting tube close to the sampling tank, and the sealing gasket abuts the sampling tank, the end sealing ring and the outer sealing ring are both arranged inside the connecting tube, and the end sealing ring abuts the open end of the sampling tank, and the outer sealing ring is sleeved on the outside of the open end of the sampling tank.

[0009] Optionally, an annular sealing groove is formed on the outer surface of the end sealing ring, the sealing groove is matched with the open end of the sampling tank, and the open end of the sampling tank is inserted into the sealing groove.

[0010] Optionally, one side of the steam heating jacket is connected to a steam inlet pipe and a steam outlet pipe through dynamic and static ring mechanical seals, respectively, and the steam inlet pipe and the steam outlet pipe are connected to an external pipeline.

[0011] Optionally, a vacuum tube is installed on one side of the reaction container through a dynamic and static ring mechanical seal.

[0012] Optionally, the reaction container is provided with an inlet and outlet, a pressure monitoring device and a temperature monitoring device respectively.

[0013] Optionally, a rotating shaft is provided on both sides of the reaction container, and the rotating shaft is mounted on the bracket through a bearing.

[0014] Optionally, a driving device is also included, and a transmission device is provided between the driving device and the rotating shaft for driving the rotating shaft to rotate.

[0015] (III) Beneficial effects

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. The purpose of sampling molecular sieve can be achieved. Moreover, through the setting of gate valve, it is not necessary to increase the pressure in the reaction vessel or cool down the steam heating jacket during sampling. At the same time, the closing of the gate valve can ensure the sealing between the reaction vessel and the outside world. When the analysis finds that the regeneration is unqualified, it is only necessary to put the sampling tank back on the connecting pipe to continue the stirring and heating regeneration work. Therefore, the sampling can be made more convenient, fast and easy to operate, thereby ensuring the processing efficiency of the regeneration reaction and facilitating the regeneration processing of the molecular sieve.

[0018] 2. Moreover, the purpose of multiple sealing between the sampling tank and the reaction container can be achieved through the sealing gasket, the outer sealing ring, the end sealing ring and the sealing groove, thereby ensuring the sealing between the two and ensuring the normal and orderly progress of the regeneration work. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the front view structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the front view structure of the sampling assembly of the utility model;

[0021] Figure 3 It is a schematic diagram of the three-dimensional structure of the local explosion of the sampling component of the utility model;

[0022] Figure 4 It is a schematic diagram of the partial structure of the sampling assembly of the utility model in cross section;

[0023] Figure 5 It is a bottom-up three-dimensional structural schematic diagram of the end sealing ring of the utility model.

[0024] In the figure: 1. reaction vessel; 2. steam heating jacket; 3. inlet and outlet; 4. pressure monitoring device; 5. rotating shaft; 6. bracket; 7. steam inlet pipe; 8. steam outlet pipe; 9. vacuum tube; 10. driving device; 11. transmission device; 12. gate valve; 13. connecting pipe; 14. sampling tank; 15. sampling port; 16. sealing gasket; 17. end sealing ring; 1701, sealing groove; 18. outer sealing ring; 19. temperature monitoring device. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] The utility model provides Figures 1 to 5 An embodiment of a regenerator for an esterification reaction catalyst is shown: it comprises a support 6, a reaction vessel 1 arranged on the support 6, and a steam heating jacket 2 sleeved on the outside of a sealing groove 1701, one side of the steam heating jacket 2 is connected to a steam inlet pipe 7 and a steam outlet pipe 8 through dynamic and static ring mechanical seals, and the steam inlet pipe 7 and the steam outlet pipe 8 are connected to an external steam system;

[0027] A vacuum tube 9 is installed on one side of the reaction container 1 through a dynamic and static ring mechanical seal, and the vacuum tube 9 is connected to the vacuum system. The reaction container 1 is provided with an inlet and outlet 3, a pressure monitoring device 4 and a temperature monitoring device 19;

[0028] A rotating shaft 5 is provided on both sides of the reaction vessel 1, and the rotating shaft 5 is installed on a bracket 6 through a bearing. The regenerator for the esterification reaction catalyst also includes a driving device 10. A transmission device 11 is provided between the driving device 10 and the rotating shaft 5 for driving the rotating shaft 5 to rotate. The driving device 10 is a driving motor, and the transmission device 11 is a belt transmission system.

[0029] The molecular sieve is added into the reaction vessel 1 through the inlet and outlet 3, and the inlet and outlet 3 is sealed through the sealing end cover, and then the pressure in the reaction vessel 1 is reduced through the vacuum system and the vacuum pipe 9, and steam is added into the steam heating jacket 2 through the steam system and the steam introduction pipe 7, and the reaction vessel 1 is heated to heat the molecular sieve, and then the motor is started, and the motor can drive the rotating shaft 5 and the reaction vessel 1 to rotate through the belt transmission system, so as to achieve stirring of the molecular sieve and make it heated more evenly.

[0030] The reaction vessel 1 is provided with a sampling port 15, and the sampling port 15 is provided with a gate valve 12, the feed port of the gate valve 12 is connected with the reaction vessel 1 through the sampling port 15, the gate valve 12 is provided with a connecting pipe 13, the connecting pipe 13 is threadedly connected with a sampling tank 14, the sampling tank 14 is connected with the discharge port of the gate valve 12 through the connecting pipe 13, and a sealing component is provided between the sampling tank 14 and the connecting pipe 13;

[0031] When sampling is required, first stop the stirring of the reaction vessel 1, and ensure that the sampling tank 14 stops below the reaction vessel 1, and then open the gate valve 12. At this time, the molecular sieve in the reaction vessel 1 will enter the interior of the sampling tank 14 through the sampling port 15, the gate valve 12 and the connecting pipe 13 in turn, and then close the gate valve 12. Finally, the sampling tank 14 can be unscrewed from the connecting pipe 13, and the purpose of sampling the molecular sieve is achieved. Moreover, through the setting of the gate valve 12, it is not necessary to increase the pressure in the reaction vessel 1 or to cool the steam heating jacket 2 during sampling, and at the same time, the sealing between the reaction vessel 1 and the outside world is guaranteed. When the analysis finds that the regeneration is unqualified, only the sampling tank 14 needs to be installed back on the connecting pipe 13 to continue the stirring, heating and regeneration work. Therefore, sampling can be made more convenient, fast and easy to operate, thereby ensuring the processing efficiency of the regeneration reaction, which is beneficial to the regeneration processing of the molecular sieve.

[0032] The sealing assembly includes a sealing gasket 16, an end sealing ring 17 and an outer sealing ring 18. The sealing gasket 16 is arranged at one end of the connecting tube 13 close to the sampling tank 14, and the sealing gasket 16 abuts against the sampling tank 14. The end sealing ring 17 and the outer sealing ring 18 are both arranged inside the connecting tube 13, and the end sealing ring 17 abuts against the open end of the sampling tank 14, and the outer sealing ring 18 is sleeved outside the open end of the sampling tank 14.

[0033] An annular sealing groove 1701 is formed on the outer surface of the end sealing ring 17 . The sealing groove 1701 is matched with the open end of the sampling tank 14 , and the open end of the sampling tank 14 is inserted into the sealing groove 1701 .

[0034] After the sampling tank 14 is screwed onto the connecting tube 13, the sealing gasket 16 can first seal the outer end of the sampling tank 14 and the connecting tube 13, and then the outer sealing ring 18 will seal the outer cylindrical surface of the open end of the sampling tank 14 and the inner hole of the connecting tube 13, and the rear end sealing ring 17 and the sealing groove 1701 will seal the open end of the sampling tank 14 and the inner hole of the connecting tube 13, thereby achieving the purpose of multiple sealing between the sampling tank 14 and the reaction vessel 1.

[0035] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A regenerator for an esterification reaction catalyst, comprising a support (6), a reaction vessel (1) arranged on the support (6), and a steam heating jacket (2) sleeved on the outside of a sealing groove (1701), characterized in that: The reaction container (1) is provided with a sampling port (15), the sampling port (15) is provided with a gate valve (12), the feed port of the gate valve (12) is connected with the reaction container (1) through the sampling port (15), the gate valve (12) is provided with a connecting pipe (13), the connecting pipe (13) is threadedly connected with a sampling tank (14), the sampling tank (14) is connected with the discharge port of the gate valve (12) through the connecting pipe (13), and a sealing component is provided between the sampling tank (14) and the connecting pipe (13).

2. The regenerator for esterification catalyst according to claim 1, characterized in that: The sealing assembly comprises a sealing gasket (16), an end sealing ring (17) and an outer sealing ring (18); the sealing gasket (16) is arranged at one end of the connecting pipe (13) close to the sampling tank (14), and the sealing gasket (16) abuts against the sampling tank (14); the end sealing ring (17) and the outer sealing ring (18) are both arranged inside the connecting pipe (13), and the end sealing ring (17) abuts against the open end of the sampling tank (14), and the outer sealing ring (18) is sleeved outside the open end of the sampling tank (14).

3. The regenerator for esterification catalyst according to claim 2, characterized in that: The outer surface of the end sealing ring (17) is provided with an annular sealing groove (1701), the sealing groove (1701) is adapted to the open end of the sampling tank (14), and the open end of the sampling tank (14) is inserted into the sealing groove (1701).

4. The regenerator for esterification catalyst according to claim 1, characterized in that: One side of the steam heating jacket (2) is connected to a steam inlet pipe (7) and a steam outlet pipe (8) through dynamic and static ring mechanical seals, respectively; the steam inlet pipe (7) and the steam outlet pipe (8) are in communication with an external pipeline.

5. The regenerator for esterification catalyst according to claim 1, characterized in that: A vacuum tube (9) is installed on one side of the reaction container (1) through a dynamic and static ring mechanical seal.

6. The regenerator for esterification catalyst according to claim 1, characterized in that: The reaction container (1) is respectively provided with an inlet and outlet port (3), a pressure monitoring device (4) and a temperature monitoring device (19).

7. The regenerator for esterification catalyst according to claim 1, characterized in that: A rotating shaft (5) is provided on both sides of the reaction container (1), and the rotating shaft (5) is mounted on a bracket (6) via a bearing.

8. The regenerator for esterification catalyst according to claim 7, characterized in that: It also comprises a driving device (10), wherein a transmission device (11) is provided between the driving device (10) and the rotating shaft (5) for driving the rotating shaft (5) to rotate.

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