Distillation device for producing tert-butyl isocyanate

Abstract

A distillation device for production of tert-butyl isocyanate relates to the technical field of production of tert-butyl isocyanate and comprises a distillation box, an electromagnetic heater is mounted at the bottom of the distillation box, a material distribution unit is mounted at the bottom of the inner side of the distillation box, a heat exchange plate is fixed to the position, close to the top, of the inner side of the distillation box, and the heat exchange plate is a ceramic plate. A heat exchange plate is arranged in the distillation box, honeycomb holes are uniformly formed in the heat exchange plate, a feeding pipe is arranged in the heat exchange plate, the feeding pipe is communicated with the material distribution unit through a guide pipe, a condenser is arranged on the side surface of the distillation box, and the condenser is communicated with the interior of the distillation box through a steam conveying pipe. According to the steam preheating device, a material body in the feeding pipe can be preheated through steam, so that the steam is prevented from being directly discharged to a cooling part to increase the subsequent workload, meanwhile, the energy consumption of the electromagnetic heater is reduced through steam preheating, the utilization rate of resources is increased, and the production cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to tertiary butyl isocyanate production technical field especially is a kind of distillation device for tertiary butyl isocyanate production. BACKGROUND

[0002] Tertiary butyl isocyanate is the important intermediate of synthetic herbicide amicarbazone, and can also be used in other pesticide and pharmaceutical intermediates, and its production process is: sodium carbonate solution and tertiary butylamine are put into reaction kettle, and stirred and cooled down.Then solid paraxylene solution is slowly added into the kettle, and after reaction is completed, liquid separation is carried out, water phase is discharged, anhydrous magnesium sulfate is put into organic phase, after stirring and drying, the material is discharged and filtered, the filtrate is pumped into organic phase transfer tank, and the organic phase transfer tank is transferred to distillation kettle for crude distillation, to obtain crude tertiary butyl isocyanate, and the crude product is transferred to rectification kettle for rectification, to obtain finished product tertiary butyl isocyanate, and after the receiving tank is cooled to normal temperature, it is packaged and stored in warehouse.

[0003] In the prior art, the patent with authorized publication number CN 217139253 U discloses a distillation column for extracting pharmaceutical intermediates, a heating pipe is arranged in the middle of the left side panel of the distillation column, and an electromagnetic heating coil is arranged outside the heating pipe, the electromagnetic heating coil arranged on the heating pipe can preheat the pharmaceutical intermediates in the heating pipe, so that the pharmaceutical intermediates maintain a high temperature when entering the distillation column, the steam generated by heating directly enters the cooling part for cooling, and the steam contains a lot of heat, which directly enters the cooling part and easily increases the burden of the part, and at the same time, resources are wasted. UTILITY MODEL CONTENT

[0004] The utility model solves the technical problems of overcoming the defects of the prior art, and provides a distillation device for tertiary butyl isocyanate production, which can preheat the material in the feed pipe by steam, so as to avoid the direct discharge of steam to the cooling part and increase the subsequent work burden, at the same time, the steam preheating reduces the energy consumption of the electromagnetic heater, improves the utilization rate of resources, and reduces the production cost, which can effectively solve the problems in the background art.

[0005] In order to achieve the purpose of the utility model, the utility model adopts the following technical solutions:

[0006] The utility model provides a distillation device for tertiary butyl isocyanate production, including the distillation tank, the bottom of distillation tank is equipped with electromagnetic heater, and the inside bottom of distillation tank is equipped with cloth unit, and the inside of distillation tank is fixed with heat exchange plate near the top position, and the heat exchange plate is ceramic plate, and the heat exchange plate is uniformly provided with honeycomb hole, and the heat exchange plate is built -in with feed pipe, and the feed pipe is communicated with cloth unit through the guide pipe, the side of distillation tank is equipped with condenser, and the condenser is communicated with the inside of distillation tank through steam delivery pipe, the connecting place of steam delivery pipe and distillation tank is equipped with fan, and the steam delivery pipe is assembled with filter, the side of distillation tank is equipped with PLC controller, and the PLC controller is electrically connected with external power supply, and the electromagnetic heater and fan are all electrically connected with PLC controller.

[0007] Further, the feed pipe in the heat exchange plate is arranged in a circuitous structure.

[0008] Further, the cloth unit comprises a rotating shaft and a bearing, and the rotating shaft is rotatably connected to the bottom of the distillation tank through the bearing.

[0009] Further, the cloth unit further comprises a cloth pipe and a storage box, the top of the storage box is rotatably connected to the end of the guide pipe through a rotary joint, the cloth pipe is communicated and fixed to the side of the storage box, and the storage box is fixed to the top of the rotating shaft and arranged inside the rotating shaft.

[0010] Further, the cloth pipe is arranged in a radial structure.

[0011] Further, the cloth unit further comprises a servo motor, a worm and a worm gear, the worm gear is sleeved and fixed to the bottom of the rotating shaft, the servo motor is installed on the side of the support part of the distillation tank, the worm is rotatably installed inside the support part of the distillation tank, the output shaft of the servo motor is fixedly connected to the end of the worm, the worm is engaged with the worm gear, and the servo motor is electrically connected with the PLC controller.

[0012] Compared with the prior art, the distillation device for tertiary butyl isocyanate production has the following advantages:

[0013] 1. The steam preheats the material in the feed pipe through the heat exchange plate, the honeycomb holes increase the heat exchange area, the material in the feed pipe can be preheated by the steam, thereby avoiding the direct discharge of steam to the cooling part and increasing the subsequent work burden, the preheating by the steam reduces the energy consumption of the electromagnetic heater, improves the resource utilization rate, and reduces the production cost.

[0014] 2. The cloth unit uniformly distributes the material, the material can be uniformly heated and evaporated, thereby avoiding slow evaporation caused by excessive single feeding, and improving the efficiency of tertiary butyl isocyanate production. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a schematic diagram of the three-dimensional structure of the utility model;

[0016] Figure 2 is a schematic diagram of the three-dimensional bottom structure of the utility model;

[0017] Figure 3 is a schematic diagram of the three-dimensional first cross-sectional structure of the utility model;

[0018] Figure 4 is a schematic diagram of the three-dimensional second cross-sectional structure of the utility model.

[0019] In the figure: 1-distillation tank, 2-PLC controller, 3-feeding pipe, 4-distributing unit, 41-servo motor, 42-worm, 43-rotating shaft, 44-worm wheel, 45-bearing, 46-distributing pipe, 47-storage box, 48-rotary joint, 5-heat exchange plate, 6-honeycomb hole, 7-electromagnetic heater, 8-condenser, 9-steam conveying pipe, 10-fan, 11-filter, 12-conduit. DETAILED DESCRIPTION

[0020] The utility model can be explained in detail through the following examples, the purpose of the utility model is disclosed to protect all technical improvements within the scope of the utility model.

[0021] Please refer to Figures 1-4The embodiment provides a technical scheme: a distillation device for t-butyl isocyanate production, which comprises a distillation tank 1, an electromagnetic heater 7 is installed at the bottom of the distillation tank 1, a distribution unit 4 is installed at the inner bottom of the distillation tank 1, a heat exchange plate 5 is fixed at the inner side of the distillation tank 1 and close to the top position, the heat exchange plate 5 is a ceramic plate, and the heat exchange plate 5 is uniformly provided with honeycomb holes 6, and the heat exchange plate 5 is internally provided with a feeding pipe 3, the feeding pipe 3 is communicated with the distribution unit 4 through a conduit 12, a condenser 8 is installed at the side of the distillation tank 1, the condenser 8 is communicated with the inside of the distillation tank 1 through a steam conveying pipe 9, a fan 10 is installed at the connection position of the steam conveying pipe 9 and the distillation tank 1, a filter 11 is assembled on the steam conveying pipe 9, a PLC controller 2 is installed at the side of the distillation tank 1, the PLC controller 2 is electrically connected with an external power supply, the electromagnetic heater 7 and the fan 10 are electrically connected with the PLC controller 2, the material in the distillation tank 1 is heated through the electromagnetic heater 7, so that the material is evaporated, the steam preheats the material in the feeding pipe 3 through the heat exchange plate 5, the honeycomb holes 6 are used for increasing the heat exchange area, after the heat exchange is completed, the fan 10 conveys the steam to the condenser 8 through the steam conveying pipe 9, the condenser 8 condenses the steam and conveys the steam to a collection area, the filter 11 filters the steam in the process of conveying the steam through the steam conveying pipe 9, the steam can preheat the material in the feeding pipe 3, so that the steam is avoided to be directly discharged to the cooling part and the subsequent work burden is increased, meanwhile, the steam preheating reduces the energy consumption of the electromagnetic heater 7, improves the resource utilization rate and reduces the production cost.

[0022] The feeding pipe 3 in the heat exchange plate 5 is arranged in a circuitous structure, so that the passing path of the material is increased, and then the material can be fully preheated.

[0023] The cloth unit 4 includes a rotating shaft 43 and a bearing 45, the rotating shaft 43 is rotatably connected with the bottom of the distillation box 1 through the bearing 45, the cloth unit 4 further includes a cloth pipe 46 and a storage box 47, the top of the storage box 47 is rotatably communicated with the end of the guide pipe 12 through a rotary joint 48, the cloth pipe 46 is provided with a plurality of cloth pipes and is communicated and fixed on the side of the storage box 47, the storage box 47 is fixed on the top of the rotating shaft 43 and is arranged on the inner side of the rotating shaft 43, the plurality of cloth pipes 46 are arranged in a radial structure, the cloth unit 4 further includes a servo motor 41, a worm 42 and a worm gear 44, the worm gear 44 is sleeved and fixed on the bottom of the rotating shaft 43, the servo motor 41 is installed on the side of the supporting part of the distillation box 1, the worm 42 is rotatably installed on the inner side of the supporting part of the distillation box 1, the output shaft of the servo motor 41 is fixedly connected with the end of the worm 42, the worm 42 is engaged with the worm gear 44, the servo motor 41 is electrically connected with the PLC controller 2, the material in the feeding pipe 3 is transported into the storage box 47 through the guide pipe 12, the material in the storage box 47 is dispersed to the inner bottom of the distillation box 1 through the cloth pipe 46, simultaneously, the output shaft of the servo motor 41 drives the worm 42 to rotate, the worm 42 is engaged with the worm gear 44, the worm gear 44 drives the storage box 47 to rotate through the rotating shaft 43, the storage box 47 drives the cloth pipe 46 to rotate, so that the cloth pipe 46 is uniformly distributed, the storage box 47 relatively rotates with the end of the guide pipe 12 through the rotary joint 48 in the rotating process, so that the material can be uniformly heated and evaporated, so that the slow evaporation caused by too much single feeding is avoided, and the production efficiency of the tert-butyl isocyanate is improved.

[0024] The working principle of the distillation device for producing tert-butyl isocyanate is as follows: the material in the distillation box 1 is heated by the electromagnetic heater 7, so that it is evaporated, the steam preheats the material in the feeding pipe 3 through the heat exchange plate 5, the honeycomb hole 6 is used for increasing the area of heat exchange, after heat exchange is completed, the fan 10 transports the steam to the condenser 8 through the steam conveying pipe 9, the condenser 8 condenses the steam and transports it to the collection area, the filter 11 filters the steam in the process of conveying the steam, the material in the feeding pipe 3 is transported into the storage box 47 through the guide pipe 12, the material in the storage box 47 is dispersed to the inner bottom of the distillation box 1 through the cloth pipe 46, simultaneously, the output shaft of the servo motor 41 drives the worm 42 to rotate, the worm 42 is engaged with the worm gear 44, the worm gear 44 drives the storage box 47 to rotate through the rotating shaft 43, the storage box 47 drives the cloth pipe 46 to rotate, so that the cloth pipe 46 is uniformly distributed, the storage box 47 relatively rotates with the end of the guide pipe 12 in the rotating process.

[0025] It is worth noting that the components disclosed in the above embodiments are all general standard components or components known to those skilled in the art, the structure and principle of which can be known by the technical personnel through technical manual or through conventional experimental method, and the model of the PLC controller 2 is selected as FPΣ.

[0026] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on should do the broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can pass through the indirect connection of intermediate medium, can be the communication or the interaction relationship of two elements of two elements inside, unless another definite limitation. For the ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances, for example, rotating connection can be rotating connection through bearing.

[0027] The part not described in the utility model is prior art, although the utility model is specifically demonstrated and introduced in combination with preferred implementation scheme, there are many specific implementation technical scheme methods and approaches, the above-mentioned is only the preferred implementation mode of the utility model, but the skilled in the art should understand that various changes can be made to the utility model in form and detail without departing from the spirit and scope of the utility model defined by the appended claims, and all are within the protection scope of the utility model.

Claims

1. A distillation apparatus for the production of tert-butyl isocyanate comprising a distillation tank (1), characterized in that: The bottom of the distillation tank (1) is provided with an electromagnetic heater (7), the inner bottom of the distillation tank (1) is provided with a distributing unit (4), the inner side of the distillation tank (1) is fixed with a heat exchange plate (5) near the top, the heat exchange plate (5) is a ceramic plate, and the heat exchange plate (5) is uniformly provided with honeycomb holes (6), the heat exchange plate (5) is internally provided with a feeding pipe (3), the feeding pipe (3) is communicated with the distributing unit (4) through a conduit (12), the side of the distillation tank (1) is provided with a condenser (8), the condenser (8) is communicated with the inside of the distillation tank (1) through a steam conveying pipe (9), the connection part of the steam conveying pipe (9) and the distillation tank (1) is provided with a fan (10), the steam conveying pipe (9) is provided with a filter (11), the side of the distillation tank (1) is provided with a PLC controller (2), the PLC controller (2) is electrically connected with an external power supply, and the electromagnetic heater (7) and the fan (10) are electrically connected with the PLC controller (2).

2. The distillation apparatus for producing tert-butyl isocyanate according to claim 1, characterized by: The feeding pipe (3) in the heat exchange plate (5) is arranged in a circuitous structure.

3. The distillation apparatus for producing tert-butyl isocyanate according to claim 1, characterized by: The distributing unit (4) comprises a rotating shaft (43) and a bearing (45), and the rotating shaft (43) is rotatably connected with the bottom of the distillation tank (1) through the bearing (45).

4. The distillation apparatus for producing tert-butyl isocyanate according to claim 1 or 3, characterized by: The distributing unit (4) further comprises a distributing pipe (46) and a storage box (47), the top of the storage box (47) is rotatably communicated with the end of the conduit (12) through a rotary joint (48), the distributing pipe (46) is provided with a plurality of pipes and is fixed on the side of the storage box (47), and the storage box (47) is fixed on the top of the rotating shaft (43) and arranged on the inner side of the rotating shaft (43).

5. The distillation apparatus for producing tert-butyl isocyanate according to claim 4, characterized by: The plurality of distributing pipes (46) are arranged in a radial structure.

6. The distillation apparatus for producing tert-butyl isocyanate according to claim 1 or 3, characterized by: The distributing unit (4) further comprises a servo motor (41), a worm (42) and a worm wheel (44), the worm wheel (44) is sleeved and fixed on the bottom of the rotating shaft (43), the servo motor (41) is arranged on the side of the supporting part of the distillation tank (1), the worm (42) is rotatably arranged on the inner side of the supporting part of the distillation tank (1), the output shaft of the servo motor (41) is fixedly connected with the end of the worm (42), the worm (42) is engaged with the worm wheel (44), and the servo motor (41) is electrically connected with the PLC controller (2).

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