Rectifying tower for trifluorotoluene reaction

Abstract

The utility model discloses a rectifying tower for trifluorotoluene reaction, which comprises a tower body, a feed inlet is arranged in the middle of the tower body, a liquid phase outlet and a steam reflux inlet are arranged at the bottom end of the tower body, and both the liquid phase outlet and the steam reflux inlet are connected with a reboiler. According to the utility model, the tower body, the feeding hole, the liquid phase outlet, the steam reflux inlet, the gas phase outlet, the condensation reflux pipe and the spraying mechanism are arranged, and the spraying mechanism comprises a middle pipe, a rotating pipe, a spray head, a motor, a worm, a worm gear and a booster pump, condensed liquid-phase raw materials in the condenser can be pressurized and pumped into the rotating pipe again through the booster pump and sprayed into the tower body through the spray head, and meanwhile, the rotating pipe is driven by the motor to rotate in the tower body, so that rising steam in the tower can be in full contact with a liquid phase sprayed by the spray head for heat exchange, light components in the liquid phase are accelerated to enter a gas phase, and the heat exchange efficiency is improved. And heavy components in a gas phase enter a liquid phase, so that the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of trifluorotoluene production, in particular to a rectification tower used for trifluorotoluene reaction. Background Art

[0002] Trifluorotoluene is an important intermediate in fluorine chemistry. It can be used to prepare herbicides such as fluometuron, fluazifop, and diflufenicol. It is also an important intermediate in medicine. The preparation of trifluorotoluene requires the use of a distillation tower, which is a tower-type gas-liquid contact device for distillation. By utilizing the different volatilities of the components in the mixture, that is, the different vapor pressures of the components at the same temperature, the light components (low-boiling substances) in the liquid phase are transferred to the gas phase, and the heavy components (high-boiling substances) in the gas phase are transferred to the liquid phase, thereby achieving the purpose of separation.

[0003] However, in the process of the existing distillation tower, the liquid phase flowing back into the tower body from the condenser does not contact sufficiently with the vapor phase rising from the evaporation, resulting in low production efficiency. Secondly, the vapor phase has a high heat before entering the condenser, and the heat cannot be recycled. Therefore, the utility model proposes a distillation tower for trifluorotoluene reaction. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a distillation tower for trifluorotoluene reaction.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a distillation tower for trifluorotoluene reaction, comprising a tower body, a feed inlet is provided in the middle of the tower body, a liquid phase outlet and a steam reflux port are provided at the bottom of the tower body, and the liquid phase outlet and the steam reflux port are both connected to a reboiler, a gas phase outlet is provided at the top of the tower body, a condensation reflux pipe is fixed to the side wall of the top of the tower body, a spray mechanism is provided at the top of the inner top of the tower body, a motor and a booster pump are respectively fixed on both sides of the outer side wall of the tower body, a rotating shaft is fixedly connected to the driving end of the motor, and the rotating shaft passes through the side wall of the tower body and is fixedly connected to a worm, and a thermal energy power generation mechanism is provided at the top of the tower body.

[0006] Furthermore, a manhole is provided in the middle of the side wall of the tower body, so that workers can enter the tower body through the manhole for maintenance.

[0007] Furthermore, the thermal energy power generation mechanism includes a heat absorbing plate, and a serpentine channel is provided inside the heat absorbing plate, and the two ends of the serpentine channel are respectively an air inlet and an air outlet, the gas phase outlet is connected to the air inlet, and the air outlet is connected to the inlet of the condenser, so that the steam passes through the heat absorbing plate before entering the condenser, and the heat of the steam is absorbed by the heat absorbing plate.

[0008] Furthermore, a semiconductor power generation sheet is fixed to the outer wall of the heat absorbing plate, and a plurality of heat sinks are provided on the heat dissipation side of the semiconductor power generation sheet, so that the semiconductor power generation sheet can absorb the heat of the heat absorbing plate to generate electricity.

[0009] Furthermore, the liquid inlet end of the booster pump is connected to the condenser outlet, and the booster pump outlet is connected to the condensation reflux pipe. The liquid phase condensed in the condenser can be pressurized by the booster pump and pumped into the condensation reflux pipe.

[0010] Furthermore, the spray mechanism includes an intermediate tube, and the top end of the intermediate tube is sealed and rotatably connected to the condensation reflux tube, the bottom end of the intermediate tube is connected to a tee, the other two ends of the tee are connected to a rotating tube, and a plurality of nozzles are provided on the lower surface of the rotating tube, so that the liquid phase in the condensation reflux tube can be sprayed from the nozzle into the inside of the tower body through the rotating tube.

[0011] Furthermore, a worm gear is fixedly sleeved on the surface of the intermediate tube, and the worm is meshed with the worm gear. The motor can drive the rotating tube to rotate inside the tower body, so that the sprayed liquid phase can fully contact with the steam.

[0012] Beneficial effects of the utility model:

[0013] 1. When the utility model is in use, a tower body, a feed port, a liquid phase outlet, a steam reflux port, a gas phase outlet, a condensation reflux pipe and a spray mechanism are arranged, and the spray mechanism includes an intermediate pipe, a rotating pipe, a nozzle, a motor, a worm, a worm gear and a booster pump. The booster pump is connected to the outlet of the condenser, so that the liquid phase raw material condensed in the condenser can be re-pressurized and pumped into the rotating pipe by the booster pump, and sprayed inside the tower body by the nozzle. At the same time, the rotating pipe is driven by the motor to rotate inside the tower body, so that the steam rising in the tower can fully contact and exchange heat with the liquid phase sprayed by the nozzle, accelerate the light components in the liquid phase to enter the gas phase, and the heavy components in the gas phase will enter the liquid phase, thereby improving production efficiency.

[0014] 2. When the utility model is in use, a thermal power generation mechanism is arranged at the top of the tower body, so that the liquid steam enters the thermal power generation mechanism before being discharged into the condenser through the gas phase outlet, thereby utilizing the heat of the steam to generate electricity, so that the heat of the steam can be fully utilized before entering the condenser, thereby achieving the purpose of saving energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an overall schematic diagram of the utility model;

[0016] Figure 2 It is a partial cross-sectional view of the utility model;

[0017] Figure 3 It is a three-dimensional diagram of the thermal energy power generation mechanism of the utility model.

[0018] Legend:

[0019] 1. Tower body; 2. Feed inlet; 3. Liquid phase outlet; 4. Steam reflux port; 5. Gas phase outlet; 6. Condensation reflux pipe; 7. Intermediate pipe; 8. Tee; 9. Rotating pipe; 10. Nozzle; 11. Motor; 12. Rotating shaft; 13. Worm; 14. Worm gear; 15. Booster pump; 16. Thermal power generation mechanism; 161. Heat absorbing plate; 162. Serpentine channel; 163. Air inlet; 164. Air outlet; 165. Semiconductor power generation sheet; 166. Heat sink; 17. Manhole. DETAILED DESCRIPTION

[0020] like Figure 1 and Figure 2 As shown, it relates to a distillation tower for trifluorotoluene reaction, including a tower body 1, a feed inlet 2 is provided in the middle of the tower body 1, a liquid phase outlet 3 and a steam reflux port 4 are provided at the bottom of the tower body 1, and the liquid phase outlet 3 and the steam reflux port 4 are both connected to the reboiler, a gas phase outlet 5 is provided at the top of the tower body 1, a condensation reflux pipe 6 is fixed to the top side wall of the tower body 1, a spray mechanism is provided at the top of the tower body 1, a motor 11 and a booster pump 15 are fixed on both sides of the outer side wall of the tower body 1, a rotating shaft 12 is fixedly connected to the driving end of the motor 11, and the rotating shaft 12 passes through the side wall of the tower body 1 and is fixedly connected to a worm 13, and a thermal energy power generation mechanism 16 is provided at the top of the tower body 1. A manhole 17 is provided in the middle of the side wall of the tower body 1.

[0021] like Figure 2 and Figure 3 As shown, the thermal energy power generation mechanism 16 includes a heat absorbing plate 161, and a serpentine channel 162 is provided inside the heat absorbing plate 161, and the two ends of the serpentine channel 162 are respectively an air inlet 163 and an air outlet 164, the gas phase outlet 5 is connected to the air inlet 163, and the air outlet 164 is connected to the inlet of the condenser. A semiconductor power generation sheet 165 is fixed to the outer wall of the heat absorbing plate 161, and a plurality of heat sinks 166 are provided on the heat dissipation side of the semiconductor power generation sheet 165. The liquid inlet end of the booster pump 15 is connected to the outlet of the condenser, and the outlet of the booster pump 15 is connected to the condensation reflux pipe 6. The spray mechanism includes an intermediate pipe 7, and the top end of the intermediate pipe 7 is sealed and rotatably connected to the condensation reflux pipe 6, the bottom end of the intermediate pipe 7 is connected to a tee 8, and the other two ends of the tee 8 are connected to a rotating pipe 9, and a plurality of nozzles 10 are provided on the lower surface of the rotating pipe 9. A worm gear 14 is fixedly sleeved on the surface of the intermediate pipe 7, and the worm 13 is meshed with the worm gear 14.

[0022] During use: the raw material enters the tower body 1 from the feed port 2, and the liquid raw material enters the reboiler from the liquid phase outlet 3, is heated and evaporated by the reboiler to form steam, and returns to the tower body 1 from the steam reflux port 4 (this part is the prior art). At this time, the steam rises in the tower body 1, and enters the serpentine channel 162 inside the heat absorbing plate 161 from the gas phase outlet 5, and transfers the heat to the heat absorbing plate 161, thereby allowing the semiconductor power generation sheet 165 to absorb the heat of the heat absorbing plate 161 to generate electricity, and then the steam is discharged from the gas outlet 164 and enters the condenser to condense into liquid. A part of the liquid trifluorotoluene flows out as a product, and the other part returns to the condensation reflux pipe 6 under the pressure of the booster pump 15, and then enters the intermediate pipe 7 and the rotating pipe 9, and is finally sprayed out by the nozzle 10. At the same time, the motor 11 will drive the worm 13 to rotate through the rotating shaft 12, and the worm 13 will drive the worm wheel 14 to rotate, thereby driving the intermediate tube 7 and the rotating tube 9 to rotate at the top of the tower body 1, so that the sprayed liquid phase and the steam are fully in contact, so that the light components in the liquid phase enter the vapor phase, and the heavy components in the steam will enter the liquid phase, the rising steam part will condense, and the sprayed liquid part will vaporize, thereby making the concentrations of the heavy components and the light components higher and higher.

[0023] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A distillation tower for trifluorotoluene reaction, comprising a tower body (1), characterized in that: A feed inlet (2) is provided in the middle of the tower body (1), a liquid phase outlet (3) and a steam reflux port (4) are provided at the bottom of the tower body (1), and both the liquid phase outlet (3) and the steam reflux port (4) are connected to a reboiler, a gas phase outlet (5) is provided at the top of the tower body (1), a condensation reflux pipe (6) is fixed to the side wall of the top of the tower body (1), a spray mechanism is provided at the top of the tower body (1), a motor (11) and a booster pump (15) are respectively fixed on both sides of the outer wall of the tower body (1), a rotating shaft (12) is fixedly connected to the driving end of the motor (11), and the rotating shaft (12) passes through the side wall of the tower body (1) and is fixedly connected to a worm (13), and a thermal energy power generation mechanism (16) is provided at the top of the tower body (1).

2. A distillation tower for trifluorotoluene reaction according to claim 1, characterized in that: A manhole (17) is provided in the middle of the side wall of the tower body (1).

3. A distillation tower for trifluorotoluene reaction according to claim 1, characterized in that: The thermal energy power generation mechanism (16) comprises a heat absorbing plate (161), and a serpentine channel (162) is provided inside the heat absorbing plate (161), and two ends of the serpentine channel (162) are respectively an air inlet (163) and an air outlet (164), the gas phase outlet (5) is connected to the air inlet (163), and the air outlet (164) is connected to the inlet of the condenser.

4. A distillation tower for trifluorotoluene reaction according to claim 3, characterized in that: A semiconductor power generation sheet (165) is fixed to the outer side wall of the heat absorption plate (161), and a plurality of heat dissipation sheets (166) are provided on the heat dissipation side of the semiconductor power generation sheet (165).

5. A distillation tower for trifluorotoluene reaction according to claim 4, characterized in that: The liquid inlet end of the booster pump (15) is connected to the outlet of the condenser, and the outlet of the booster pump (15) is connected to the condensation reflux pipe (6).

6. A distillation tower for trifluorotoluene reaction according to claim 1, characterized in that: The spray mechanism comprises an intermediate tube (7), and the top end of the intermediate tube (7) is sealed and rotatably connected to the condensation reflux tube (6), the bottom end of the intermediate tube (7) is connected to a tee (8), the other two ends of the tee (8) are connected to a rotating tube (9), and a plurality of spray heads (10) are provided on the lower surface of the rotating tube (9).

7. A distillation tower for trifluorotoluene reaction according to claim 6, characterized in that: A worm wheel (14) is fixedly sleeved on the surface of the intermediate tube (7), and the worm (13) is meshed with the worm wheel (14).

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