An acetonitrile recovery reaction apparatus

Abstract

The utility model relates to acetonitrile recovery technical field, and disclose a kind of acetonitrile recovery reaction device, reaction tank assembly, including reaction tank body, the cover of being arranged at the top of the reaction tank body, the cover inside the cover of being arranged, and the recovery assembly of being arranged at the top of the cover and reaction tank body intercommunication;Condensing component, including being arranged at the top of the reaction tank body one side cooling box, the filter screen of being arranged at the inside of the cooling box, and spiral pipe of being fixedly installed in the inside of the recovery assembly, the condensing component further includes fixed in the bottom of the spiral pipe water outlet pipe, fixed in the top of the spiral pipe water inlet pipe.This acetonitrile recovery reaction device, by setting filter screen in the inside of cooling box, cooling water can be filtered, to avoid the impurity in cooling water and block spiral pipe, cause cooling water to be unable to pass through spiral pipe normally, influence the condensation recovery of acetonitrile.

Description

Technical Field

[0001] This utility model relates to the field of acetonitrile recovery technology, specifically an acetonitrile recovery reaction device. Background Technology

[0002] In the preparation of perfluorobutyryl fluoride, acetonitrile is used as a solvent to heat the raw materials to 60–80°C. Since the boiling point of acetonitrile is near the heating temperature, acetonitrile vapor is generated, which increases the pressure inside the reaction vessel. In order to work normally, the reaction vessel will depressurize, and some acetonitrile vapor will be discharged, which can easily affect the reaction process.

[0003] In the field of perfluorobutyryl fluoride preparation, existing reaction tanks use condensation devices to condense and recover acetonitrile vapor and then reintroduce it into the reaction tank to achieve acetonitrile recycling. However, the cooling water used during condensation circulates within the condenser tubes. If the cooling water is not filtered in time, the impurities contained in the cooling water will eventually cause blockage of the condenser tubes, affecting their normal use. Utility Model Content

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0005] Given that existing reaction vessels recover acetonitrile through condenser tubes, and the cooling water used during condensation circulates within the condenser tubes, if the cooling water is not filtered in time, the impurities contained in the cooling water will eventually clog the condenser tubes, affecting their normal use.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An acetonitrile recovery reaction device, characterized in that it comprises:

[0008] The reaction vessel assembly includes a reaction vessel body, a cover disposed on the top of the reaction vessel body, a shroud disposed inside the cover body, and a recovery assembly disposed on the top of the shroud body and communicating with the reaction vessel body.

[0009] The condensation assembly includes a cooling box disposed on one side of the top of the reaction vessel, a filter screen disposed inside the cooling box, and a spiral tube fixedly installed inside the recovery assembly.

[0010] As a further embodiment of this utility model: the condensation assembly also includes a water outlet pipe fixed to the bottom of the spiral tube, a water inlet pipe fixed to the top of the spiral tube, and a water pump installed in the middle of the water inlet pipe via a flange, the water pump being fixed to the side of the cooling box.

[0011] As a further improvement of this utility model: the interior of the cooling box is also provided with a guide plate with a zigzag structure, the middle part of the guide plate is higher than the periphery of the guide plate, the guide plate is located above the filter screen, and the water outlet of the water inlet pipe is located above the center of the guide plate.

[0012] As a further embodiment of this utility model: the recycling assembly includes a recycling pipe fixed to the top of the cover, a top cover fixed to the top of the recycling pipe, and a plurality of barrier plates disposed on the inner wall of the recycling pipe.

[0013] As a further embodiment of this utility model: the end of the barrier plate near the vertical center line of the recovery pipe is higher than the end of the barrier plate away from the vertical center line of the recovery pipe, and the spiral tube is located in the middle of the recovery pipe.

[0014] As a further embodiment of this utility model: the recycling pipe extends through the top of the cover, the cooling box is connected to the spiral pipe through the water outlet pipe, and the spiral pipe is connected to the cooling box through the water inlet pipe and the water pump.

[0015] As a further improvement of this utility model: heat dissipation components are provided on the front and rear sides of the cooling box. The heat dissipation components include heat dissipation fins fixed on the front and rear sides of the cooling box, a support frame disposed above the heat dissipation fins, and multiple heat dissipation fans installed inside the support frame.

[0016] As a further improvement of this utility model: the air blowing direction of the cooling fan is towards the cooling fins, the bottom of the cooling box is fixed with a bottom support, and the top of the reaction vessel is also fixed with a feed pipe for feeding materials.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] This invention filters the cooling water by installing a filter screen inside the cooling box, thereby preventing impurities in the cooling water from clogging the spiral tube and causing the cooling water to be unable to pass through the spiral tube normally, thus affecting the condensation and recovery of acetonitrile.

[0019] This invention, by installing a heat dissipation component on the outside of the cooling box, can cool the heat-absorbing cooling water under the action of the heat dissipation fan and heat dissipation fins, thus satisfying the requirement of circulating cooling water. Attached Figure Description

[0020] Figure 1This is a schematic diagram of an acetonitrile recovery reaction device;

[0021] Figure 2 This is a partial cross-sectional schematic diagram of the recovery pipe in an acetonitrile recovery reaction device;

[0022] Figure 3 This is a schematic diagram of a condensation component in an acetonitrile recovery reactor.

[0023] Figure 4 This is a half-sectional schematic diagram of a reaction vessel assembly in an acetonitrile recovery reaction device;

[0024] Figure 5 This is a half-sectional schematic diagram of a cooling box in an acetonitrile recovery reaction device.

[0025] In the diagram: 1. Reaction vessel assembly; 101. Reaction vessel body; 102. Cover; 103. Feed pipe; 104. Cover; 2. Recovery assembly; 201. Recovery pipe; 202. Top cover; 203. Baffle plate; 3. Condensation assembly; 301. Cooling box; 302. Bottom support; 303. Water outlet pipe; 304. Spiral tube; 305. Water inlet pipe; 306. Water pump; 307. Guide plate; 308. Filter screen; 4. Heat dissipation assembly; 401. Heat dissipation fins; 402. Support frame; 403. Heat dissipation fan. Detailed Implementation

[0026] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0027] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0029] Example 1

[0030] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4 This is the first embodiment of the present invention, which provides an acetonitrile recovery reaction device, comprising:

[0031] The reaction vessel assembly 1 includes a reaction vessel body 101, a cover 102 disposed on the top of the reaction vessel body 101, a cover 104 disposed inside the cover 102, and a recovery assembly 2 disposed on the top of the cover 104 and communicating with the reaction vessel body 101.

[0032] The condensation assembly 3 includes a cooling box 301 disposed on one side of the top of the reaction vessel 101, a filter screen 308 disposed inside the cooling box 301, and a spiral tube 304 fixedly installed inside the recovery assembly 2.

[0033] Specifically, the condenser assembly 3 also includes a water outlet pipe 303 fixed to the bottom of the spiral tube 304, a water inlet pipe 305 fixed to the top of the spiral tube 304, and a water pump 306 installed in the middle of the water inlet pipe 305 via a flange. The water pump 306 is fixed to the side of the cooling box 301.

[0034] Furthermore, after the water pump 306 starts, the cooling water in the cooling box 301 can enter the spiral tube 304 through the outlet pipe 303, and then be discharged back into the cooling box 301 through the inlet pipe 305 at the top of the spiral tube 304. The water is then filtered by the filter screen 308 in the cooling box 301, thereby preventing impurities in the cooling water from clogging the spiral tube 304, which would prevent the cooling water from passing through the spiral tube 304 normally and affect the condensation and recovery of acetonitrile.

[0035] Specifically, the interior of the cooling box 301 is also equipped with a zigzag-shaped guide plate 307. The middle part of the guide plate 307 is higher than the periphery of the guide plate 307. The guide plate 307 is located above the filter screen 308, and the outlet end of the water inlet pipe 305 is located above the center of the guide plate 307.

[0036] Furthermore, when the cooled water that has absorbed heat re-enters the cooling box 301 through the inlet pipe 305, it can be guided by the guide plate 307 and sprayed towards the inner wall of the cooling box 301. The water then collects on the filter screen 308 and, after cooling, can re-enter the spiral tube 304 through the outlet pipe 303 to achieve circulating condensation.

[0037] In use, reactants are placed inside the reaction vessel 101. A solenoid valve is installed at the connection between the reaction vessel 101 and the recovery pipe 201, along with a suitable pressure sensor. The pressure sensor detects the gas pressure inside the reaction vessel 101. When the pressure increases, the solenoid valve opens, allowing gas to rise into the recovery pipe 201. At this time, the water pump 306 starts, and the cooling water in the cooling box 301 enters the spiral tube 304 through the outlet pipe 303, and is then discharged back into the cooling box 301 through the inlet pipe 305 at the top of the spiral tube 304. The filter screen 308 filters the water to prevent impurities in the cooling water from clogging the spiral tube 304, which would prevent the cooling water from passing through the spiral tube 304 normally and affect the condensation and recovery of acetonitrile. At the same time, when the cooling water that has absorbed heat re-enters the cooling box 301 through the inlet pipe 305, it can be guided by the guide plate 307 and sprayed towards the inner wall of the cooling box 301. After cooling, it can re-enter the spiral tube 304 through the outlet pipe 303 to achieve circulating condensation. After condensation, the acetonitrile condenses into liquid and can flow back into the reaction tank 101.

[0038] In summary, the acetonitrile recovery reactor can filter the cooling water by installing a filter screen 308 inside the cooling box 301, thereby preventing impurities in the cooling water from clogging the spiral tube 304, which would prevent the cooling water from passing through the spiral tube 304 normally and affect the condensation and recovery of acetonitrile.

[0039] Example 2

[0040] Please see Figure 1 , Figure 3 and Figure 5 This is the second embodiment of the present invention, which provides an improved design for an acetonitrile recovery reaction device.

[0041] Specifically, the recycling component 2 includes a recycling pipe 201 fixed to the top of the cover 104, a top cover 202 fixed to the top of the recycling pipe 201, and a plurality of barrier plates 203 disposed on the inner wall of the recycling pipe 201.

[0042] Furthermore, the baffle plate 203 can block the upward velocity of the gas, thereby prolonging the contact time between the gas and the spiral tube 304.

[0043] Specifically, the end of the baffle plate 203 closest to the vertical center line of the recovery pipe 201 is higher than the end of the baffle plate 203 furthest from the vertical center line of the recovery pipe 201, and the spiral pipe 304 is located in the middle of the recovery pipe 201.

[0044] Furthermore, when the gas comes into contact with the spiral tube 304, the cooling water inside the spiral tube 304 passes through, which can absorb the heat of the gas, and the acetonitrile gas can be reliquefied and flow back into the recovery tube 201.

[0045] Specifically, the recycling pipe 201 runs through the top of the cover 102, the cooling box 301 is connected to the spiral pipe 304 through the water outlet pipe 303, and the spiral pipe 304 is connected to the cooling box 301 through the water inlet pipe 305 and the water pump 306.

[0046] Furthermore, the recovery pipe 201 penetrates the cover 102 and is fixedly connected to the shroud 104, which is in communication with it. The shroud 104 guides the gas, allowing it to rise smoothly.

[0047] Specifically, the cooling box 301 is provided with heat dissipation components 4 on the front and rear sides. The heat dissipation components 4 include heat dissipation fins 401 fixed on the front and rear sides of the cooling box 301, a support frame 402 set above the heat dissipation fins 401, and multiple heat dissipation fans 403 installed inside the support frame 402.

[0048] Furthermore, the heat dissipation component 4 can blow air between the heat dissipation fins 401 under the action of the heat dissipation fan 403, thereby cooling the heat dissipation fins 401. The heat dissipation fins 401 can quickly dissipate the heat from the cooling box 301, thereby cooling the cooling box 301.

[0049] Specifically, the airflow direction of the cooling fan 403 is towards the cooling fins 401, the bottom of the cooling box 301 is fixed with a bottom support 302, and the top of the reaction vessel 101 is also fixed with a feed pipe 103 for feeding materials.

[0050] Furthermore, the feed pipe 103 is used to feed materials into the reaction vessel 101.

[0051] During use, in the condensation process, the cooling fan 403 is started, and the cooling fan 403 blows air onto the cooling fins 401, which allows the air to circulate quickly on the surface of the cooling fins 401, thereby achieving rapid cooling of the cooling box 301 through the cooling fins 401, and thus cooling the internal cooling water.

[0052] In summary, by installing a heat dissipation component 4 on the outside of the cooling box 301, the cooling water after absorbing heat can be cooled by the action of the cooling fan 403 and the heat dissipation fins 401, thus satisfying the requirement of circulating cooling water.

[0053] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0054] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0055] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0056] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or 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 or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An acetonitrile recovery reaction device, characterized in that: include: The reaction vessel assembly (1) includes a reaction vessel body (101), a cover (102) disposed on the top of the reaction vessel body (101), a cover (104) disposed inside the cover (102), and a recovery assembly (2) disposed on the top of the cover (104) and communicating with the reaction vessel body (101). The condensation assembly (3) includes a cooling box (301) disposed on one side of the top of the reaction vessel (101), a filter screen (308) disposed inside the cooling box (301), and a spiral tube (304) fixedly installed inside the recovery assembly (2).

2. The acetonitrile recovery reaction device according to claim 1, characterized in that: The condensation assembly (3) also includes an outlet pipe (303) fixed to the bottom of the spiral tube (304), an inlet pipe (305) fixed to the top of the spiral tube (304), and a water pump (306) installed in the middle of the inlet pipe (305) via a flange. The water pump (306) is fixed to the side of the cooling box (301).

3. The acetonitrile recovery reaction device according to claim 2, characterized in that: The cooling box (301) is also equipped with a zigzag-shaped guide plate (307) inside. The middle part of the guide plate (307) is higher than the periphery of the guide plate (307). The guide plate (307) is located above the filter screen (308). The water outlet of the water inlet pipe (305) is located above the center of the guide plate (307).

4. The acetonitrile recovery reaction device according to claim 3, characterized in that: The recycling assembly (2) includes a recycling tube (201) fixed to the top of the cover (104), a top cover (202) fixed to the top of the recycling tube (201), and a plurality of baffles (203) disposed on the inner wall of the recycling tube (201).

5. The acetonitrile recovery reaction device according to claim 4, characterized in that: The end of the barrier plate (203) near the vertical center line of the recovery pipe (201) is higher than the end of the barrier plate (203) away from the vertical center line of the recovery pipe (201), and the spiral pipe (304) is located in the middle of the recovery pipe (201).

6. The acetonitrile recovery reaction device according to claim 5, characterized in that: The recycling pipe (201) extends through the top of the cover (102), the cooling box (301) is connected to the spiral pipe (304) through the water outlet pipe (303), and the spiral pipe (304) is connected to the cooling box (301) through the water inlet pipe (305) and the water pump (306).

7. The acetonitrile recovery reaction apparatus according to claim 6, characterized in that: The cooling box (301) is provided with heat dissipation components (4) on the front and rear sides. The heat dissipation components (4) include heat dissipation fins (401) fixed on the front and rear sides of the cooling box (301), a support frame (402) provided above the heat dissipation fins (401), and multiple heat dissipation fans (403) installed inside the support frame (402).

8. The acetonitrile recovery reaction apparatus according to claim 7, characterized in that: The airflow direction of the cooling fan (403) is towards the cooling fins (401), the bottom of the cooling box (301) is fixed with a bottom bracket (302), and the top of the reaction tank (101) is also fixed with a feed pipe (103) for feeding materials.

Images