Distillation equipment for malononitrile production

Abstract

The utility model discloses distillation equipment for malononitrile production. The distillation equipment comprises a rack, the right side of the upper surface of the rack is provided with an evaporation chamber, the upper end of the evaporation chamber is provided with a steam pipe, the left end of the steam pipe is connected with a condensation chamber, a spiral pipe is arranged in the condensation chamber, the two ends of the spiral pipe extend out of the condensation chamber, the right end of the spiral pipe is connected with a first liquid inlet pipe, and the right end of the first liquid inlet pipe extends to the lower end in the evaporation chamber. A shell is fixedly arranged outside the condensation chamber in a sleeving mode, the left end of the spiral pipe is communicated with the interior of the shell, a liquid supply pipe is arranged at a liquid inlet hole in the right end of the outer arc face of the shell, a spiral piece is arranged between the inner arc wall of the shell and the outer arc face of the condensation chamber, a controller is arranged on the front side face of the rack, and a heating disc is arranged on the lower surface of the evaporation chamber. According to the distillation equipment for malononitrile production, a solution to be evaporated can be preheated while steam is cooled, the heat exchange effect is good, energy waste is reduced, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of malononitrile production, in particular to a distillation device for malononitrile production. Background Technique

[0002] Malononitrile has a wide range of applications in the fields of chemical engineering and organic synthesis. It can be used as a solvent, intermediate, and catalyst in organic synthesis, participating in various chemical reactions. At the same time, malononitrile is also used in the pesticide industry. It can be used to manufacture various pesticides, such as oxadiazon and thiazopyr. During the production of malononitrile, a distillation device is used for purification. The distillation device heats the liquid mixture to evaporate the volatile components therein, and then condenses these vapors back into a liquid state, thereby achieving the separation of different components. The steam of the existing distillation device generally uses water cooling, which has a good cooling and distillation effect. However, the heated water flow will dissipate heat into the environment, and thus the thermal energy of the steam cannot be utilized, resulting in heat loss and insufficient energy conservation. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide a distillation device for malononitrile production, which can preheat the solution to be evaporated while cooling the steam, has a good heat exchange effect, reduces energy waste, and lowers production costs, and can effectively solve the problems in the background technique.

[0004] To achieve the above purpose, the utility model provides the following technical solution: A distillation device for malononitrile production, including a frame;

[0005] Frame: On the right side of its upper surface, there is an evaporation chamber. At the upper end of the evaporation chamber, there is a steam pipe. The left end of the steam pipe is connected to a condensation chamber. Inside the condensation chamber, there is a spiral pipe. Both ends of the spiral pipe extend out of the external of the condensation chamber. The right end of the spiral pipe is connected to a first liquid inlet pipe. The right end of the first liquid inlet pipe extends to the lower end inside the evaporation chamber. The external of the condensation chamber is fixedly sleeved with a housing. The left end of the spiral pipe communicates with the inside of the housing. At the liquid inlet hole on the right outer arc surface of the housing, there is a liquid supply pipe. While cooling the steam, it can preheat the solution to be evaporated, realizing the recovery of thermal energy. At the same time, the solution flows back and forth and spirally inside and outside the condensation chamber, thus having a good heat exchange effect, reducing energy waste, and saving the production cost of malononitrile.

[0006] Further, between the inner arc wall of the housing and the outer arc surface of the condensation chamber, there are spiral fins, which facilitate controlling the spiral flow of the solution.

[0007] Further, on the front side of the frame, there is a controller. On the lower surface of the evaporation chamber, there is a heating plate. The input end of the heating plate is electrically connected to the output end of the controller. The input end of the controller is electrically connected to an external power source, which is convenient for heating the solution.

[0008] Furthermore, a liquid injection pump is provided in the middle of the upper surface of the frame. The liquid outlet end of the liquid injection pump is communicated with the lower end of the liquid supply pipe, and the input end of the liquid injection pump is electrically connected to the output end of the controller, which facilitates the control of the flow of the solution.

[0009] Furthermore, a condensate pipe is provided at the liquid discharge hole at the left end of the outer arc surface of the condensation chamber. A solution tank is provided on the left side of the upper surface of the frame. The middle part of the condensate pipe penetrates through the solution tank. The condensate pipe is a spiral condensate pipe. A second liquid inlet pipe is provided at the round hole on the upper surface of the solution tank. The liquid suction pipe of the liquid injection pump extends into the interior of the solution tank, which can further cool the solution.

[0010] Furthermore, a planar spiral guide plate is provided on the bottom wall of the evaporation chamber, and a drain pipe is provided at the round hole on the outer arc surface of the evaporation chamber, which can promote the circulating flow of the heated solution.

[0011] Furthermore, the condensation chamber is inclined downward from right to left, which facilitates the discharge of the condensate.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows: The distillation equipment for malononitrile production of the present utility model has the following advantages:

[0013] Steam enters the interior of the condensation chamber through the steam pipe. The outer shell and the spiral pipe cool the steam with the solution inside. While cooling the steam, the solution to be evaporated can be preheated, realizing the recovery of heat energy. At the same time, the solution flows back and forth and spirally both outside and inside the condensation chamber, thus having a good heat exchange effect, reducing energy waste, and saving the production cost of malononitrile. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic structural diagram of the present utility model;

[0015] Figure 2 It is a front view of the present utility model.

[0016] In the figure: 1 frame, 2 evaporation chamber, 3 steam pipe, 4 condensation chamber, 5 spiral pipe, 6 first liquid inlet pipe, 7 heating plate, 8 planar spiral guide plate, 9 outer shell, 10 spiral fin, 11 solution tank, 12 condensate pipe, 13 liquid injection pump, 14 liquid supply pipe, 15 controller, 16 drain pipe, 17 second liquid inlet pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0018] Please refer to Figure 1-2 , this embodiment provides a technical solution: a distillation device for the production of malononitrile, including a frame 1;

[0019] Frame 1: An evaporation chamber 2 is provided on the right side of its upper surface. A steam pipe 3 is provided at the upper end of the evaporation chamber 2. The left end of the steam pipe 3 is connected to a condensation chamber 4. A spiral pipe 5 is provided inside the condensation chamber 4. Both ends of the spiral pipe 5 extend outside the condensation chamber 4. The right end of the spiral pipe 5 is connected to a first liquid inlet pipe 6. The right end of the first liquid inlet pipe 6 extends to the lower end inside the evaporation chamber 2. The solution inside the spiral pipe 5 enters the inside of the evaporation chamber 2 through the first liquid inlet pipe 6. An outer shell 9 is fixedly sleeved outside the condensation chamber 4. The left end of the spiral pipe 5 communicates with the inside of the outer shell 9. A liquid supply pipe 14 is provided at the liquid inlet hole on the right outer arc surface of the outer shell 9. Steam enters the inside of the condensation chamber 4 through the steam pipe 3. The outer shell 9 and the spiral pipe 5 cool the steam with the solution inside. At the same time, the waste heat of the steam can be used to preheat the malononitrile solution. A spiral fin 10 is provided between the inner arc wall of the outer shell 9 and the outer arc surface of the condensation chamber 4. Under the action of the spiral fin 10, the malononitrile solution spirally flows around the condensation chamber 4 and then is injected into the inside of the spiral pipe 5. A controller 15 is provided on the front side of the frame 1. A heating plate 7 is provided on the lower surface of the evaporation chamber 2. The input end of the heating plate 7 is electrically connected to the output end of the controller 15. The input end of the controller 15 is electrically connected to an external power supply. The heating plate 7 works to heat and evaporate the solution inside the evaporation chamber 2. An outer shell 9 is fixedly sleeved outside the condensation chamber 4. The left end of the spiral pipe 5 communicates with the inside of the outer shell 9. A liquid supply pipe 14 is provided at the liquid inlet hole on the right outer arc surface of the outer shell 9. A liquid injection pump 13 is provided in the middle of the upper surface of the frame 1. The liquid outlet end of the liquid injection pump 13 is communicated with the lower end of the liquid supply pipe 14. The input end of the liquid injection pump 13 is electrically connected to the output end of the controller 15. A condensate pipe 12 is provided at the liquid discharge hole on the left outer arc surface of the condensation chamber 4. A solution tank 11 is provided on the left side of the upper surface of the frame 1. The middle of the condensate pipe 12 penetrates through the solution tank 11. The condensate pipe 12 is a spiral condensate pipe. A second liquid inlet pipe 17 is provided at the round hole on the upper surface of the solution tank 11. The liquid suction pipe of the liquid injection pump 13 extends into the inside of the solution tank 11. The external malononitrile solution is added to the inside of the solution tank 11 through the second liquid inlet pipe 17. The liquid injection pump 13 pumps the solution inside the solution tank 11 into the inside of the outer shell 9. The cooled liquid flows into the inside of the condensate pipe 12. The liquid inside the condensate pipe 12 exchanges heat with the malononitrile solution inside the solution tank 11 through its own wall body, can preheat the malononitrile solution, and cool the malononitrile solution again. A planar spiral deflector 8 is provided on the bottom wall of the evaporation chamber 2. A drain pipe 16 is provided at the round hole on the outer arc surface of the evaporation chamber 2. The planar spiral deflector 8 deflects the liquid, causing the solution to spiral outward from the center and then be discharged through the first liquid inlet pipe 6. The condensation chamber 4 is inclined downward from right to left to facilitate the discharge of condensate to the left.

[0020] The working principle of a distillation device for malononitrile production provided by the present utility model is as follows: During use, the external malononitrile solution is added to the interior of the solution tank 11 through the second liquid inlet pipe 17. By adjusting the controller 15, the liquid injection pump 13 pumps the solution inside the solution tank 11 into the interior of the outer shell 9. The malononitrile solution spirally flows around the condensation chamber 4 under the action of the spiral fins 10, and then is injected into the interior of the spiral tube 5, and then enters the interior of the evaporation chamber 2 through the first liquid inlet pipe 6. The heating plate 7 operates to heat and evaporate the solution inside the evaporation chamber 2, and the planar spiral deflector 8 deflects the liquid, causing the solution to spiral outward from the center and then be discharged through the first liquid inlet pipe 6. The steam enters the interior of the condensation chamber 4 through the steam pipe 3. The outer shell 9 and the spiral tube 5 cool the steam with the solution inside. At the same time, the waste heat of the steam can be used to preheat the malononitrile solution. Then, the cooled liquid flows into the interior of the condensate pipe 12. The liquid inside the condensate pipe 12 exchanges heat with the malononitrile solution inside the solution tank 11 through its own wall body, which can preheat the malononitrile solution and cool the malononitrile solution again.

[0021] It should be noted that the heating plate 7, the liquid injection pump 13, and the controller 15 disclosed in the above embodiments can all be freely configured according to the actual application scenarios. The heating plate 7 can be selected as a cast aluminum electric heating plate, the liquid injection pump 13 can be selected as a chemical standard magnetic pump of the AMC series, and the core chip of the controller 15 can be selected as a single-chip microcomputer with the model number STM32H743. The controller 15 controls the heating plate 7 and the liquid injection pump 13 to work using common methods in the prior art.

[0022] The above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structural or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present utility model.

Claims

1. A distillation device for the production of malononitrile, characterized in that: Including a frame (1); Frame (1): An evaporation chamber (2) is provided on the right side of its upper surface. A steam pipe (3) is provided at the upper end of the evaporation chamber (2). The left end of the steam pipe (3) is connected to a condensation chamber (4). A spiral pipe (5) is provided inside the condensation chamber (4). Both ends of the spiral pipe (5) extend outside the condensation chamber (4). The right end of the spiral pipe (5) is connected to a first liquid inlet pipe (6). The right end of the first liquid inlet pipe (6) extends to the lower end inside the evaporation chamber (2). An outer shell (9) is fixedly sleeved outside the condensation chamber (4). The left end of the spiral pipe (5) communicates with the inside of the outer shell (9). A liquid supply pipe (14) is provided at the liquid inlet hole on the right outer arc surface of the outer shell (9).

2. The distillation equipment for producing malononitrile according to claim 1, characterized in that: A spiral fin (10) is provided between the inner arc wall of the outer shell (9) and the outer arc surface of the condensation chamber (4).

3. The distillation equipment for malononitrile production according to claim 1, characterized in that: A controller (15) is provided on the front side of the frame (1). A heating plate (7) is provided on the lower surface of the evaporation chamber (2). The input end of the heating plate (7) is electrically connected to the output end of the controller (15). The input end of the controller (15) is electrically connected to an external power supply.

4. A distillation apparatus for the production of malononitrile according to claim 3, characterized in that: A liquid injection pump (13) is provided in the middle of the upper surface of the frame (1). The liquid outlet end of the liquid injection pump (13) communicates with the lower end of the liquid supply pipe (14). The input end of the liquid injection pump (13) is electrically connected to the output end of the controller (15).

5. The distillation equipment for producing malononitrile according to claim 4, characterized in that: A condensate pipe (12) is provided at the liquid discharge hole on the left outer arc surface of the condensation chamber (4). A solution tank (11) is provided on the left side of the upper surface of the frame (1). The middle of the condensate pipe (12) penetrates through the solution tank (11). The condensate pipe (12) is a spiral condensate pipe. A second liquid inlet pipe (17) is provided at the round hole on the upper surface of the solution tank (11). The liquid suction pipe of the liquid injection pump (13) extends into the solution tank (11).

6. The distillation equipment for malononitrile production according to claim 1, characterized in that: A planar spiral guide plate (8) is provided on the bottom wall of the evaporation chamber (2). A drain pipe (16) is provided at the round hole on the outer arc surface of the evaporation chamber (2).

7. A distillation device for the production of malononitrile according to claim 1, characterized in that: The condensation chamber (4) is inclined downward from right to left.

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