Distillation device for preparing polyurethane resin

Abstract

The utility model relates to the technical field of polyurethane production, and discloses a distillation device for preparing polyurethane resin, which comprises a base, and a stirring tank and a condensing tank are respectively arranged at the top of the base; a motor is arranged at the top of the stirring tank, and a motor shaft of the motor penetrates through the stirring tank downwards and is connected with a stirring rod; the tank wall of the stirring tank is of a double-layer structure, an interlayer is a heating cavity, and the heating cavity is provided with a heating rod of a spiral structure; a connecting pipe is arranged at the top of the stirring tank and connected with an exhaust fan arranged at the top of the condensation tank, the exhaust fan is connected with an input pipe, the input pipe penetrates into the condensation tank and is connected with an upper flow dividing cavity, a plurality of spiral pipes are evenly arranged at the bottom of the upper flow dividing cavity, and the bottom ends of the spiral pipes are connected with a lower flow converging cavity. And the bottom of the lower confluence cavity is connected with a distillate discharge port. According to the utility model, materials in the stirring tank can be uniformly heated, the liquefying speed can be greatly improved, and the occupied area is small.

Description

Technical Field

[0001] The utility model relates to the technical field of polyurethane production, in particular to a distillation device for preparing polyurethane resin. Background Art

[0002] Distillation is a thermodynamic separation process that utilizes the different boiling points of components in a mixed liquid or liquid-solid system to evaporate the low-boiling-point component and then condense it to separate the entire component. It is a unit operation process that combines the two unit operations of evaporation and condensation.

[0003] The Chinese patent with the publication number CN208031946U discloses a distillation device for polyurethane production, which is provided with a condensate, a protective layer and a heat preservation layer. The condensate is used to wrap three thin tubes, and is used to reduce the temperature of the gas in the thin tubes so that it liquefies and flows into the collector along the inclined thin tubes. The protective layer is used for heat conduction to heat the polyurethane, so that the polyurethane boils and becomes gas. The second is to isolate the oxidation reaction so that the oxidation reaction is carried out inside the distiller, which reduces the loss of heat and increases the utilization rate of energy. The heat preservation layer is used for heat preservation, which greatly reduces the loss of heat inside the distiller and further accelerates the distillation rate. The combination of multiple structures enables the device to better distill polyurethane. On the one hand, the patent uses an oxygen tank for heating, which is relatively unsafe, and is not an integrated structure, occupying a large area. On the other hand, the heating position is concentrated at the bottom, and the heating is uneven. Moreover, the distilled gas is divided into three parts only by three thin tubes, so that the contact surface between it and the condensate is greatly increased, and the liquefaction rate is limited. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide a distillation device for preparing polyurethane resin, which can evenly heat the materials in the stirring tank, greatly improve the liquefaction rate, and occupy a small area, so as to solve the problems mentioned in the above background technology.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts such a technical scheme: a distillation device for preparing polyurethane resin, characterized in that it includes a base, and a stirring tank and a condensing tank are respectively arranged on the top of the base; a motor is arranged on the top of the stirring tank, and the motor shaft of the motor passes through the stirring tank downward and is connected to a stirring rod; the tank wall of the stirring tank is a double-layer structure, and its interlayer is a heating chamber, and the heating chamber is provided with a heating rod with a spiral structure; a connecting pipe is arranged on the top of the stirring tank, and the connecting pipe is connected to an exhaust fan arranged on the top of the condensing tank, and the exhaust fan is connected to an input pipe, and the input pipe passes through the inside of the condensing tank and is connected to an upper diversion chamber, and a plurality of spiral tubes are evenly arranged on the bottom of the upper diversion chamber, and the bottom ends of the plurality of spiral tubes are connected to a lower confluence chamber, and the bottom of the lower confluence chamber is connected to a distillate discharge port; a liquid inlet is arranged on the top of the condensing tank, and a liquid outlet is arranged at the bottom.

[0006] Furthermore, a plurality of annular heat sinks are provided on the outer side of the condensation tank from top to bottom.

[0007] Furthermore, a distillate receiving cylinder is provided at the bottom of the base below the distillate discharge port.

[0008] Furthermore, a feed pipe is provided on one side of the top of the stirring tank, and a discharge pipe is provided at the center of the bottom of the stirring tank.

[0009] Furthermore, the bottom of the stirring tank is a conical bottom.

[0010] Furthermore, a tank cover is arranged on the top of the stirring tank, an inner ring is arranged on the bottom of the tank cover, and a sealing ring is arranged on the outer side of the inner ring.

[0011] Furthermore, a plurality of contact rings are arranged at intervals on the outer side wall of the spiral tube.

[0012] Furthermore, a heating controller is provided at the bottom of the base.

[0013] Beneficial Effects

[0014] Compared with the prior art, the utility model has at least the following advantages: the material to be distilled enters the stirring tank from the feed inlet, the heating controller controls the heating rod to heat the material, and the motor drives the stirring rod to stir the material, so that the material is quickly heated evenly. Under the action of the exhaust fan, the distillate enters the upper diversion chamber through the connecting pipe and the input pipe, and enters multiple spiral tubes through the diversion. The spiral tubes are immersed in the condensate in the condensation tank and exchange heat with the condensate. The structure of the multi-way spiral tube improves the condensation efficiency. The spiral tube with a spiral structure lengthens the condensation path of the distillate and accelerates the condensation speed of the distillate. Multiple contact rings are arranged at intervals on the outer wall of the spiral tube to increase the contact area between the spiral tube and the condensate, further improving the condensation speed of the distillate. Multiple annular heat sinks are arranged on the side of the condensation tank from top to bottom to dissipate the heat of the condensate that absorbs the heat of the distillate, further improving the condensation speed of the distillate. The heating method of the spiral heating rod, and the arrangement of the stirring tank and the condensation tank on the base make the equipment highly integrated and reduce the floor space. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model.

[0016] Figure 2 It is a schematic diagram of the bottom structure of the upper diversion chamber of the utility model.

[0017] Figure 3 It is a structural schematic diagram of the spiral tube of the utility model.

[0018] Markings in the figure: 1-base; 2-heating tank; 3-heating rod; 4-feeding pipe; 5-tank cover; 50-inner ring; 51-sealing ring; 6-motor; 7-stirring rod; 8-connecting pipe; 9-exhaust fan; 10-input pipe; 11-temperature sensor; 12-liquid inlet pipe; 13-heat sink; 14-upper diversion chamber; 15-spiral tube; 150-contact ring; 16-lower confluence chamber; 17-liquid outlet pipe; 18-distillate outlet; 19-distillate receiving tube; 20-heating chamber; 21-heating controller; 22-discharge pipe; 23-conical bottom; 24-condensation tank. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the utility model clearer, a detailed description is given below in conjunction with the accompanying drawings and specific implementation methods. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model. Therefore, the utility model is not limited by the specific implementation disclosed below.

[0020] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to an element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0022] See also Figure 1-Figure 3 The present embodiment provides a distillation device for preparing polyurethane resin, comprising a base 1, and a stirring tank 2 and a condensing tank 24 are respectively arranged on the top of the base 1. A tank cover 5 is arranged on the top of the stirring tank 2, and an inner ring 50 is arranged on the bottom of the tank cover 5. A sealing ring 51 is arranged on the outer side of the inner ring 50, and the sealing ring 51 is in close contact with the side wall of the stirring tank 2. The tank cover 5 is locked on the top of the stirring tank 2 by bolts, and maintenance and cleaning are convenient by opening the tank cover 5. A feed pipe 4 is arranged on one side of the top of the stirring tank 2, and a discharge pipe 22 is arranged at the bottom center of the stirring tank 2. Preferably, the bottom of the stirring tank 2 is a conical bottom, which is conducive to the discharge of materials.

[0023] A motor 6 is arranged on the top of the tank cover 5 of the stirring tank 2, and the motor shaft of the motor 6 passes through the tank cover 5 of the stirring tank 2 downward and is connected to a stirring rod 7. The tank wall of the stirring tank 7 is a double-layer structure, and the interlayer is a heating chamber 20, and the heating chamber 20 is provided with a heating rod 3 with a spiral structure. A heating controller 21 is arranged at the bottom of the base 1, and the heating rod 7 is electrically connected to the heating controller 21.

[0024] A connecting pipe 8 is provided on the top of the tank cover 5 of the stirring tank 2, and the connecting pipe 8 is connected to an exhaust fan 9 provided on the top of the condensing tank 24. The exhaust fan 9 is also connected to an input pipe 10, and the input pipe 10 penetrates into the interior of the condensing tank 24 and is connected to an upper diversion chamber 14. A plurality of spiral tubes 15 are evenly provided at the bottom of the upper diversion chamber 14, and the bottom ends of the plurality of spiral tubes 15 are connected to a lower confluence chamber 16, and the bottom of the lower confluence chamber 16 is connected to a distillate discharge port 18. A liquid inlet 12 is provided on the top of the condensing tank 24, and a liquid outlet 17 is provided at the bottom. Condensate or cold water flows into the interior of the condensing tank through the liquid inlet 12, and flows out of the condensing tank 24 through the liquid outlet 17, and the distillate passing through the spiral tube 15 is condensed. In this embodiment, the spiral tube 15 with a spiral structure lengthens the condensation path of the distillate and accelerates the condensation speed of the distillate. Preferably, the outer wall of the spiral tube 15 is provided with a plurality of contact rings 150 at intervals to increase the contact area between the spiral tube and the condensate, thereby further increasing the condensation rate of the distillate. The outer side surface of the condensation tank 24 is provided with a plurality of annular heat sinks 13 from top to bottom to dissipate the heat of the condensate that absorbs the heat of the distillate, thereby further increasing the condensation rate of the distillate.

[0025] A distillate receiving cylinder 19 is disposed at the bottom of the base 1 below the distillate discharge port 17 .

[0026] In this embodiment, the discharge pipe 22 and the distillate outlet 18 are respectively provided with valves.

[0027] In the specific implementation, the material to be distilled enters the stirring tank from the feed port 14, the heating controller 21 controls the heating rod to heat the material, and the motor drives the stirring rod to stir the material, so that the material is quickly heated and evenly. Under the action of the exhaust fan, the distillate enters the upper diversion chamber 14 through the connecting pipe 8 and the input pipe 10, and is diverted into multiple spiral tubes 15. The spiral tubes are immersed in the condensate in the condensation tank and exchange heat with the condensate. The contact ring and the heat sink are used to greatly improve the condensation speed of the distillate. After the equipment is finished working, the condensed liquid distillate is discharged into the distillate receiving cylinder 19 through the distillate discharge port, and the remaining material in the stirring tank is discharged through the discharge port 22.

[0028] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A distillation apparatus for preparing a polyurethane resin, characterized in that: It comprises a base, and a stirring tank and a condensing tank are respectively arranged on the top of the base; a motor is arranged on the top of the stirring tank, and the motor shaft of the motor passes through the stirring tank downward and is connected to a stirring rod; the tank wall of the stirring tank is a double-layer structure, and its interlayer is a heating chamber, and the heating chamber is provided with a heating rod with a spiral structure; a connecting pipe is arranged on the top of the stirring tank, and the connecting pipe is connected to an exhaust fan arranged on the top of the condensing tank, and the exhaust fan is connected to an input pipe, and the input pipe passes through the inside of the condensing tank and is connected to an upper diversion chamber, and a plurality of spiral tubes are evenly arranged on the bottom of the upper diversion chamber, and the bottom ends of the plurality of spiral tubes are connected to a lower confluence chamber, and the bottom of the lower confluence chamber is connected to a distillate discharge port; a liquid inlet is arranged on the top of the condensing tank, and a liquid outlet is arranged at the bottom.

2. A distillation apparatus for preparing a polyurethane resin according to claim 1, characterized in that: A plurality of annular heat sinks are arranged on the outer side of the condensation tank from top to bottom.

3. A distillation apparatus for preparing a polyurethane resin according to claim 1, characterized in that: A distillate receiving cylinder is arranged at the bottom of the base below the distillate discharge port.

4. A distillation apparatus for preparing a polyurethane resin according to claim 1, characterized in that: A feeding pipe is arranged on one side of the top of the stirring tank, and a discharging pipe is arranged at the center of the bottom of the stirring tank.

5. A distillation apparatus for preparing a polyurethane resin according to claim 1, characterized in that: The bottom of the stirring tank is a conical bottom.

6. A distillation apparatus for preparing a polyurethane resin according to claim 1, characterized in that: The top of the stirring tank is provided with a tank cover, the bottom of the tank cover is provided with an inner ring, and the outer side of the inner ring is provided with a sealing ring.

7. A distillation apparatus for preparing a polyurethane resin according to claim 1, characterized in that: A plurality of contact rings are arranged at intervals on the outer side wall of the spiral tube.

8. A distillation apparatus for preparing a polyurethane resin according to claim 1, characterized in that: A heating controller is arranged at the bottom of the base.

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