Separating device for purifying n-heptane

Abstract

The utility model relates to a separation device for purifying n-heptane, which comprises a vertical tank body, a stirring mechanism and a heating element, and is characterized in that an upper cover and a bottom plate of the vertical tank body are led out from the upper end and the lower end of a central shaft of the stirring mechanism, the upper end of the central shaft is connected with an upper right-angle connecting pipe through a rotary joint, and the upper right-angle connecting pipe is fixedly connected with the upper cover through an upper bracket; the lower end of the central shaft is connected with a lower right-angle connecting pipe through a rotary joint, the lower right-angle connecting pipe is fixedly connected with the bottom plate through a lower bracket, a transmission part is fixed on the shaft section of the central shaft led out of the vertical tank body, and the central shaft is a hollow shaft and is communicated with the upper right-angle connecting pipe and the lower right-angle connecting pipe; a three-way pipe is connected to the discharge port, one discharge port of the three-way pipe is connected with an inlet pipeline of a lifting pump, the other discharge port of the three-way pipe is a discharge port, an annular buffer cavity is formed in the upper cover, the tail end of an outlet pipeline of the lifting pump is communicated with the annular buffer cavity, and a plurality of nozzles are uniformly arranged on the bottom surface of the annular buffer cavity. According to the device, rapid distillation separation is realized, and the separation efficiency is remarkably improved.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical equipment, in particular to a separation device for purifying normal heptane. Background Art

[0002] n-Heptane is a colorless, volatile organic compound liquid. A separation device is required in the process of low-temperature de-isomerization of n-heptane.

[0003] CN 214512735 U discloses a separation device for low-temperature de-isomerization of n-heptane, comprising a tank body, a feed port provided at the top of the tank body, a motor provided at the bottom of the tank body, a rotating shaft driven to rotate by the motor symmetrically provided at the bottom of the tank body, and stirring blades connected to both sides of the rotating shaft through stirring rods. The device heats and evaporates isoalkanes in the raw material through a heating plate, and drives the stirring rods and stirring blades to rotate by the symmetrically distributed rotating shafts driven by the motor to stir the raw material, so that the raw material is heated more evenly, and is intended to increase the evaporation rate of isoalkanes in the raw material, and to improve the purification efficiency of n-heptane to a certain extent. However, the following problems still exist during its use: even if the double-paddle drive improves the stirring capacity, the evaporation area of ​​the liquid surface is limited, which limits the rapid distillation separation speed. Utility Model Content

[0004] The purpose of the utility model is to provide a separation device for purifying n-heptane with a reasonable structure and reliable use to solve the above problems, realize rapid distillation separation and significantly improve separation efficiency.

[0005] The technical solution of the utility model is:

[0006] A separation device for purifying n-heptane comprises a vertical tank body, a stirring mechanism arranged in the vertical tank body, and a heating element arranged in the side wall and bottom plate of the vertical tank body, wherein the stirring mechanism comprises a central axis and a stirring blade arranged on the central axis, a negative pressure pipeline is arranged on the upper cover of the vertical tank body, and a discharge port is arranged on the bottom plate of the vertical tank body. The technical key points are as follows: the upper and lower ends of the central axis are respectively connected to a rotating joint after being led out of the upper cover and the bottom plate of the vertical tank body, the top surface and the bottom surface of the vertical tank body are respectively provided with a sealing bearing seat matched with the central axis, the upper end of the central axis is connected to an upper right-angle connecting pipe by a rotating joint, and the upper right-angle connecting pipe is connected to the upper right-angle connecting pipe by a rotating joint. The tube is connected and fixed to the upper cover by an upper bracket, the lower end of the central axis is connected to the lower right-angle connecting pipe by a rotating joint, the lower right-angle connecting pipe is connected and fixed to the bottom plate by a lower bracket, a transmission part is fixed on the shaft section of the central axis leading out of the vertical tank body, the central axis is a hollow shaft and is connected to the upper right-angle connecting pipe and the lower right-angle connecting pipe; a three-way pipe is connected to the discharge port, one discharge port of the three-way pipe is connected to the inlet pipeline of the lifting pump, and the other discharge port is a discharge port, an annular buffer chamber is built in the upper cover, the end of the outlet pipeline of the lifting pump is connected to the annular buffer chamber, and a plurality of nozzles are evenly arranged on the bottom surface of the annular buffer chamber.

[0007] In the above-mentioned separation device for purifying n-heptane, the inner bottom surface of the vertical tank body is a conical surface, and the inner end of the discharge port is higher than the lower end of the conical surface and is fixed with a filter screen.

[0008] In the above-mentioned separation device for purifying n-heptane, a heating medium circulation device is connected between the upper right-angle connecting pipe and the lower right-angle connecting pipe.

[0009] In the above-mentioned separation device for purifying n-heptane, the transmission member is a driven sprocket, a motor reducer is fixed to the bottom surface of the base plate, a driving sprocket corresponding to the driven sprocket is fixed on the output shaft of the motor reducer, and a chain is connected between the driving sprocket and the driven sprocket.

[0010] In the above-mentioned separation device for purifying n-heptane, the center line of the annular buffer chamber coincides with the center line of the vertical tank body, and the upper cover is formed by buckling an upper cover body and a lower cover body, so as to facilitate the production of the annular buffer chamber.

[0011] The beneficial effects of the utility model are:

[0012] 1. The liquid at the bottom of the vertical tank is extracted by the lifting pump and sprayed into the upper cavity of the vertical tank through the nozzle of the annular buffer chamber. Due to the heating effect of the heating element, the temperature in the upper cavity of the vertical tank is relatively high, and the evaporation efficiency of the fine mist material is high, so that steam is not only generated on the surface of the liquid in the entire tank, breaking through the limiting factor of the liquid surface size and increasing the distillation separation speed.

[0013] 2. The heating medium is introduced into the central axis through the lower right-angle connecting pipe and then led out through the upper right-angle connecting pipe. The heating medium can be heated back and forth through the heating medium circulation device, so that the central axis and the stirring blades also dissipate heat to the material. The dual effect of the heating element improves the evaporation efficiency, thereby increasing the distillation separation speed. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0015] In the figure: 1. upper right-angle connecting pipe, 2. upper bracket, 3. upper cover, 4. vertical tank body, 5. heating element, 6. stirring blade, 7. central axis, 8. outlet pipeline, 9. lifting pump, 10. discharge port, 11. three-way pipe, 12. lower bracket, 13. driven sprocket, 14. rotary joint, 15. lower right-angle connecting pipe, 16. filter screen, 17. nozzle, 18. negative pressure pipeline, 19. annular buffer chamber, 20. rotary joint. DETAILED DESCRIPTION

[0016] The utility model is described in detail according to the accompanying drawings of the specification.

[0017] like Figure 1 As shown, the separation device for purifying n-heptane comprises a vertical tank body 4, a stirring mechanism arranged in the vertical tank body 4, and a heating element 5 arranged in the side wall and the bottom plate of the vertical tank body 4. The stirring mechanism comprises a central axis 7 and a stirring blade 6 arranged on the central axis 7. An injection pipeline (omitted in the figure) and a negative pressure pipeline 18 are arranged on the upper cover 3 of the vertical tank body 4, and a discharge port 10 is arranged on the bottom plate of the vertical tank body 4.

[0018] Among them, the upper and lower ends of the central axis 7 are respectively connected to the rotary joints 20 and 14 after being led out of the upper cover 3 and the bottom plate of the vertical tank body 4. The top and bottom surfaces of the vertical tank body 4 are respectively provided with sealing bearing seats matched with the central axis 7. The upper end of the central axis 7 is connected to the upper right-angle connecting pipe 1 by means of a rotary joint 20, and the upper right-angle connecting pipe 1 is connected and fixed to the upper cover 3 by means of an upper bracket 2. The lower end of the central axis 7 is connected to the lower right-angle connecting pipe 15 by means of a rotary joint 14, and the lower right-angle connecting pipe 15 is connected and fixed to the bottom plate by means of a lower bracket 12. A transmission part is fixed on the shaft section of the central axis 7 leading out of the vertical tank body 4. The central axis 7 is a hollow shaft and is communicated with the upper right-angle connecting pipe 1 and the lower right-angle connecting pipe 15. A heating medium circulation device (omitted in the figure) is connected between the upper right-angle connecting pipe 1 and the lower right-angle connecting pipe 15.

[0019] The discharge port 10 is connected to a three-way pipe 11, one of the discharge ports of the three-way pipe 11 is connected to the inlet pipeline of the lifting pump 9, and the other discharge port is a discharge port, and control valves are respectively provided at the two discharge ports. An annular buffer chamber 19 is built into the upper cover 3, and the end of the outlet pipeline 8 of the lifting pump 9 is connected to the annular buffer chamber 19, and a plurality of nozzles 17 are evenly arranged on the bottom surface of the annular buffer chamber 19. In this embodiment, the center line of the annular buffer chamber 19 coincides with the center line of the vertical tank body 4, and the upper cover 3 is formed by buckling the upper cover body and the lower cover body, so as to facilitate the production of the annular buffer chamber 19.

[0020] The inner cavity bottom surface of the vertical tank body 4 is a conical surface, and the inner end of the discharge port 10 is higher than the lower end of the conical surface and is fixed with a filter screen 16. The transmission member is a driven sprocket 13, and a motor reducer (omitted in the figure) is fixed to the bottom surface of the bottom plate. A driving sprocket corresponding to the driven sprocket 13 is fixed on the output shaft of the motor reducer, and a chain is connected between the driving sprocket and the driven sprocket.

[0021] Working principle:

[0022] When in use, the heating element 5 is pre-heated with electricity, and the material to be separated is added to the vertical tank body 4 through the injection pipeline. At the same time, the heating medium is injected into the central shaft 7 and the motor reducer is started to drive the central shaft 7 and the stirring blade 6 to rotate. The material entering the vertical tank body 4 is quickly and evenly heated by the heating element 5, the central shaft 7 and the stirring blade 6. The generated steam is sent to the cooler and the cooling tank through the negative pressure pipeline 18 to collect the separated material. In this process, the lifting pump 9 is started, and the lifting pump 9 sends the material at the bottom of the vertical tank body 4 to the annular buffer chamber 19, and then the mist material is formed through each nozzle 17 and evaporates rapidly in the upper cavity of the vertical tank body 4, and is sucked into the negative pressure pipeline 18 together with the steam evaporated from the liquid surface, thereby improving the separation efficiency.

[0023] The above is a detailed description of the embodiments of the utility model, but the above contents are only preferred embodiments of the utility model and cannot be considered to limit the scope of implementation of the utility model. All equivalent changes and improvements made within the scope of the invention of the utility model should still fall within the scope of this patent.

Claims

1. A separation device for purifying n-heptane, comprising a vertical tank body, a stirring mechanism arranged in the vertical tank body, and a heating element arranged in the side wall and bottom plate of the vertical tank body, wherein the stirring mechanism comprises a central axis and a stirring blade arranged on the central axis, a negative pressure pipeline is arranged on the upper cover of the vertical tank body, and a discharge port is arranged on the bottom plate of the vertical tank body, characterized in that: The upper and lower ends of the central axis are respectively connected to the upper cover and the bottom plate of the vertical tank body after being led out, and the top and bottom surfaces of the vertical tank body are respectively provided with sealing bearing seats matching the central axis, the upper end of the central axis is connected with the upper right-angle connecting pipe by a rotating joint, and the upper right-angle connecting pipe is connected and fixed to the upper cover by an upper bracket, and the lower end of the central axis is connected with the lower right-angle connecting pipe by a rotating joint, and the lower right-angle connecting pipe is connected and fixed to the bottom plate by a lower bracket, and a transmission part is fixed on the shaft section where the central axis leads out of the vertical tank body, and the central axis is a hollow shaft and is communicated with the upper right-angle connecting pipe and the lower right-angle connecting pipe; a three-way pipe is connected at the discharge port, one discharge port of the three-way pipe is connected to the inlet pipeline of the lifting pump, and the other discharge port is a discharge port, an annular buffer chamber is built in the upper cover, and the end of the outlet pipeline of the lifting pump is communicated with the annular buffer chamber, and a plurality of nozzles are evenly arranged on the bottom surface of the annular buffer chamber.

2. The separation device for purifying n-heptane according to claim 1, characterized in that: The bottom surface of the inner cavity of the vertical tank body is a conical surface, and the inner end of the discharge port is higher than the lower end of the conical surface and is fixed with a filter screen.

3. The separation device for purifying n-heptane according to claim 1, characterized in that: A heating medium circulation device is connected between the upper right-angle connecting pipe and the lower right-angle connecting pipe.

4. The separation device for purifying n-heptane according to claim 1, characterized in that: The transmission member is a driven sprocket, a motor reducer is fixed to the bottom surface of the base plate, a driving sprocket corresponding to the driven sprocket is fixed to the output shaft of the motor reducer, and a chain is connected between the driving sprocket and the driven sprocket.

5. The separation device for purifying n-heptane according to claim 1, characterized in that: The center line of the annular buffer cavity coincides with the center line of the vertical tank body, and the upper cover is formed by buckling an upper cover body and a lower cover body.

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