A fully enclosed seed addition device for a pressurized crystallization tank

Abstract

The utility model provides a kind of for the full-closed seed adding device of pressure crystallizing tank, its structure includes seed storage container, first valve, second valve, breather pipeline, exhaust pipeline and balance pipeline;Seed storage container upper and lower two ends are open, the lower port of seed storage container is connected with the feeding pipe of crystallizing tank by first valve, and the upper port of seed storage container is connected with seed adding pipeline by second valve;Breather pipeline, exhaust pipeline are set on the lateral wall of seed storage container, and communicate with the cavity of seed storage container;Balance pipeline one end communicates with the cavity of seed storage container, and the other end communicates with the cavity of crystallizing tank, for balancing the pressure of the cavity of seed storage container and the cavity of crystallizing tank.The utility model can realize the full-closed addition of seed, can avoid the direct contact of gas inside and outside crystallizing tank, effectively solve material pollution, organic solvent leakage and other problems, improve the convenience, security of seed adding process.

Description

Technical Field

[0001] This utility model belongs to the field of industrial crystallization technology, specifically relating to a fully enclosed seed crystal addition device for pressurized crystallization tanks. Background Technology

[0002] In chemical production, the traditional method of adding seed crystals to a crystallizer is to pour the seed crystals directly into the crystallizer through the material inlet or handhole. This method exposes the crystallizer to contact with the external environment, allowing outside air or impurities to enter the tank, increasing the risk of product contamination. Furthermore, organic solvents inside the crystallizer can easily spill into the outside air, posing a potential safety hazard to operators and increasing environmental risks. In addition, adding seed crystals to a pressurized crystallizer requires depressurization, which often disrupts the crystallization process balance, directly impacting product quality and significantly affecting the crystallization process. Therefore, there is an urgent need to find a convenient, safe method for adding seed crystals that does not interfere with the reaction process within the crystallizer. Utility Model Content

[0003] The purpose of this invention is to provide a fully enclosed seed crystal addition device for pressurized crystallizers, so as to achieve safe, fast and convenient addition of seed crystals and solve problems such as material in the crystallizer being contaminated by the outside air and the overflow of organic gas and solvent in the crystallizer during the seed crystal addition process.

[0004] This utility model is implemented as follows: A fully enclosed seed crystal addition device for a pressurized crystallizer includes a seed crystal storage container, a first valve, a second valve, a venting pipeline, an exhaust pipeline, and a balancing pipeline. The seed crystal storage container has openings at both the top and bottom. The lower port of the seed crystal storage container is connected to the feeding pipe of the crystallization tank through a first valve, and the upper port of the seed crystal storage container is connected to the seed crystal addition pipe through a second valve. The venting pipe and the exhaust pipe are located on the side wall of the seed crystal storage container and communicate with the cavity of the seed crystal storage container. The venting pipe is used to introduce inert gas into the seed crystal storage container, and the exhaust pipe is used to discharge the gas in the seed crystal storage container. One end of the balancing pipe is connected to the cavity of the seed crystal storage container, and the other end is connected to the cavity of the crystallization tank, which is used to balance the pressure between the cavity of the seed crystal storage container and the cavity of the crystallization tank.

[0005] As a further improvement, a venting valve is provided on the venting pipe and a venting valve is provided on the exhaust pipe, the exhaust pipe being located at the top of the seed crystal storage container.

[0006] As a further improvement, a balancing valve and a pressure gauge are provided on the balancing pipeline.

[0007] As a further improvement, a cleaning pipeline is also included, which is disposed on the side wall of the seed storage container and communicates with the cavity of the seed storage container, and a cleaning valve is provided on the cleaning pipeline.

[0008] As a further improvement, the first valve and the second valve are automatic valves.

[0009] As a further improvement, the seed storage container includes a cylindrical body and a conical body located at the lower part of the cylindrical body.

[0010] As a further improvement, the seed crystal addition channel is a funnel-shaped channel that is wider at the top and narrower at the bottom.

[0011] This utility model has the following beneficial effects: This invention relates to a fully enclosed seed crystal addition device for pressurized crystallizers, which enables fully enclosed seed crystal addition, avoids direct contact between gases inside and outside the crystallizer, effectively prevents material contamination and organic solvent leakage, and improves the convenience and safety of the seed crystal addition process.

[0012] This invention relates to a fully enclosed seed crystal addition device for a pressurized crystallizer, equipped with a venting pipeline, an exhaust pipeline, a balancing pipeline, and a cleaning pipeline. When seed crystals are loaded into the seed storage container and the first and second valves are closed to form a sealed space, the venting and exhaust pipelines can be used to replace the air inside the seed storage container, ensuring an inert gas environment and effectively preventing outside air from entering the crystallizer. The balancing pipeline ensures pressure balance between the seed crystal adder and the crystallizer, preventing the leakage of gas and organic solvents due to high internal pressure in the crystallizer. The cleaning medium pipeline allows for cleaning of the container's interior after the reaction is complete. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the fully enclosed seed crystal addition device for pressurized crystallizers according to this utility model.

[0014] In the diagram: 1. Seed storage container; 2. First valve; 3. Second valve; 4. Seed addition pipeline; 5. Venting pipeline; 6. Cleaning pipeline; 7. Exhaust pipeline; 8. Balancing pipeline; 9. Venting valve; 10. Cleaning valve; 11. Air venting valve; 12. Balancing valve; 13. Pressure gauge; 14. Crystallization tank. Detailed Implementation

[0015] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0016] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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. In addition, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0017] like Figure 1 As shown, this utility model provides a fully enclosed seed crystal addition device for a pressurized crystallizer 14. Its structure mainly includes a seed crystal storage container 1, a first valve 2, a second valve 3, a venting pipe 5, an exhaust pipe 7, and a balance pipe 8.

[0018] The seed storage container 1 has openings at both the top and bottom. The lower port of the seed storage container 1 is connected to the feeding pipe of the crystallization tank 14 via a first valve 2, and the upper port of the seed storage container 1 is connected to the seed addition pipe 4 via a second valve 3. The second valve 3 controls the entry of the seed from the seed addition pipe 4 into the seed storage container 1, and the first valve 2 controls the entry of the seed from the seed storage container 1 into the crystallization tank 14.

[0019] The first valve 2 and the second valve 3 are automatic valves. Specifically, both the first valve 2 and the second valve 3 can be pneumatic butterfly valves.

[0020] The seed storage container 1 has flange structures at both the top and bottom. The first valve 2 and the second valve 3 are connected to the port of the seed storage container 1 through their own flange structures.

[0021] The seed storage container 1 is generally a structure that is larger at the top and smaller at the bottom. Specifically, it can be composed of a cylindrical body and a conical body located at the bottom of the cylindrical body. The upper cylindrical body has a large diameter and a large internal space, which facilitates the entry and storage of the seed crystals, while the lower conical body facilitates the output of the seed crystals.

[0022] A vent pipe 5 and an exhaust pipe 7 are provided on the side wall of the seed storage container 1. Both the vent pipe 5 and the exhaust pipe 7 are connected to the cavity of the seed storage container 1. The vent pipe 5 is used to introduce inert gas into the seed storage container 1, and the exhaust pipe 7 is used to exhaust the gas in the seed storage container 1.

[0023] A venting valve 9 is installed on the venting pipe 5, and a venting valve 11 is installed on the exhaust pipe 7. The exhaust pipe 7 is generally located at the top of the seed storage container 1. When the venting pipe 5 introduces inert gas into the seed storage container 1, the gas pressure inside the seed storage container 1 increases. After reaching the preset value, the venting valve 11 opens to discharge the gas inside the seed storage container 1, thereby realizing the replacement of air with inert gas inside the seed storage container 1.

[0024] One end of the balancing pipe 8 is connected to the cavity of the seed storage container 1, and the other end is connected to the cavity of the crystallization tank 14. The balancing pipe 8 is used to balance the pressure in the cavity of the seed storage container 1 and the cavity of the crystallization tank 14.

[0025] A balancing valve 12 and a pressure gauge 13 are installed on the balancing pipeline 8. The pressure gauge 13 detects whether the internal pressure of the seed storage container 1 and the crystallization tank 14 is balanced. Opening the balancing valve 12 can connect the seed storage container 1 and the crystallization tank 14 to achieve pressure balance between the two. Pressure balance between the seed storage container 1 and the crystallization tank 14 facilitates the output of seed crystals from the seed storage container 1 to the crystallization tank 14.

[0026] This utility model also includes a cleaning pipeline 6, which is disposed on the side wall of the seed storage container 1 and is connected to the cavity of the seed storage container 1. A cleaning valve 10 is provided on the cleaning pipeline 6. After the cleaning valve 10 is opened, cleaning liquid can be introduced into the seed storage container 1 to clean the seed storage container 1.

[0027] The seed crystal adding channel 4 can be a funnel-shaped channel that is wider at the top and narrower at the bottom, which facilitates the tilting of the seed crystal.

[0028] Pneumatic valves can be selected for cleaning valve 10, vent valve 9 and balancing valve 12.

[0029] The method of using the fully enclosed seed crystal addition device of this utility model for pressurized crystallizer 14 is as follows: (1) Confirm that the first valve 2, cleaning valve 10, vent valve 9, venting valve 11, and balancing valve 12 are closed. Open the second valve 3 and add the weighed seed crystals into the seed crystal storage container 1 through the seed crystal addition pipe 4. Then close the second valve 3. At this time, a sealed space is formed inside the seed crystal adder.

[0030] (2) Open the vent valve 9 to introduce inert gas (such as nitrogen) into the seed storage container 1, and at the same time open the vent valve 11 to discharge the gas. After a period of ventilation, the air in the seed storage container 1 will be replaced with inert gas. The combined use of the vent pipe 5 and the exhaust pipe 7 can ensure that the seed storage container 1 is inert gas environment, effectively preventing outside air from entering the crystallization tank 14.

[0031] (3) Open the balance valve 12, and close the balance valve 12 after the pressure inside the seed storage container 1 and the crystallization tank 14 reaches equilibrium. The equilibrium of the internal pressure of the seed storage container 1 and the crystallization tank 14 can ensure that the seed crystal falls smoothly into the crystallization tank 14 in the next step.

[0032] (4) Open the first valve 2, and the seed crystals will fall into the crystallization tank 14 through the feeding pipe. When the seed crystals have poor fluidity, the vent valve 9 can be opened to purge with inert gas to improve the fluidity of the seed crystals. After the seed crystals have been added, close the first valve 2.

[0033] (5) After the reaction in the crystallization tank 14 is completed and emptied, open the first valve 2 and the cleaning valve 10, and introduce the cleaning medium (such as ethanol) to rinse the seed crystal storage container 1. The waste liquid flows into the crystallization tank 14 and is combined with the cleaning liquid in the crystallization tank 14 before being processed.

[0034] This invention relates to a fully enclosed seed crystal addition device for a pressurized crystallizer 14. Utilizing a seed crystal storage container 1, valves, a venting pipe 5, an exhaust pipe 7, and a balancing pipe 8, it enables the addition of seed crystals in a fully enclosed manner, effectively preventing outside air from entering the crystallizer 14 and reducing the risk of material contamination. Simultaneously, it prevents the spillage of organic solvents from the crystallizer 14, reducing environmental pollution risks and improving operational safety. Furthermore, this invention includes a cleaning pipe 6, which allows for effective cleaning of the container's interior after the reaction is complete.

[0035] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A fully enclosed seed crystal addition device for a pressurized crystallizer, characterized in that, It includes a seed storage container, a first valve, a second valve, a venting pipe, an exhaust pipe, and a balancing pipe; The seed crystal storage container has openings at both the top and bottom. The lower port of the seed crystal storage container is connected to the feeding pipe of the crystallization tank through a first valve, and the upper port of the seed crystal storage container is connected to the seed crystal addition pipe through a second valve. The venting pipe and the exhaust pipe are located on the side wall of the seed crystal storage container and communicate with the cavity of the seed crystal storage container. The venting pipe is used to introduce inert gas into the seed crystal storage container, and the exhaust pipe is used to discharge the gas in the seed crystal storage container. One end of the balancing pipe is connected to the cavity of the seed crystal storage container, and the other end is connected to the cavity of the crystallization tank, which is used to balance the pressure between the cavity of the seed crystal storage container and the cavity of the crystallization tank.

2. The fully enclosed seed crystal addition device for a pressurized crystallizer according to claim 1, characterized in that, A venting valve is installed on the venting pipe, and a venting valve is installed on the exhaust pipe. The exhaust pipe is located at the top of the seed crystal storage container.

3. The fully enclosed seed crystal addition device for a pressurized crystallizer according to claim 1, characterized in that, A balancing valve and a pressure gauge are installed on the balancing pipeline.

4. The fully enclosed seed crystal addition device for a pressurized crystallizer according to claim 1, characterized in that, It also includes a cleaning pipeline, which is disposed on the side wall of the seed storage container and communicates with the cavity of the seed storage container. A cleaning valve is provided on the cleaning pipeline.

5. The fully enclosed seed crystal addition device for a pressurized crystallizer according to claim 1, characterized in that, The first valve and the second valve are automatic valves.

6. The fully enclosed seed crystal addition device for a pressurized crystallizer according to claim 1, characterized in that, The seed storage container includes a cylindrical body and a conical body located at the bottom of the cylindrical body.

7. The fully enclosed seed crystal addition device for a pressurized crystallizer according to claim 1, characterized in that, The seed crystal addition channel is a funnel-shaped channel that is wider at the top and narrower at the bottom.

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