Distillation tower for furfural production

Abstract

The utility model discloses a distillation tower for furfural production, which comprises a heat exchange condensation mechanism arranged at the upper end in a tower body, a purification mechanism arranged at the upper end outside the tower body, a temperature sensor and a pressure sensor distributed in the tower body, a pneumatic pump arranged on one side of the tower body, a main control computer arranged below the side surface of the tower body, and an extension cylinder arranged at the bottom end in the tower body, laminate mechanisms are distributed between the side face of the extending cylinder and the inner side wall of the tower body, a rotating shaft frame is arranged in the extending cylinder, a driving motor is arranged on the bottom face of the tower body, annular grooves are formed in the laminate mechanisms, and stirring rods are arranged on the side face of the upper end of the rotating shaft frame and correspond to the annular grooves. According to the utility model, the electric heating pipes are arranged on the plurality of layers of division laminates, so that the heating temperature of each layer can be controlled at different temperatures, and furfural liquid entering the tower body can be uniformly and fully heated by arranging the stirring rods in a matched manner; and meanwhile, multiple sets of inclined plates of the heat exchange condensation mechanism are matched with a heat exchange coil pipe, so that steam heat energy can be fully recycled, and heat energy loss is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of distillation towers, in particular to a distillation tower for furfural production. Background Art

[0002] The production process of furfural, also known as 2-furanaldehyde, is an important organic compound that was originally produced from rice bran by heating it with dilute acid. The distillation tower used in modern furfural production usually includes a tower body, a base frame, a heating zone, a furfural distillation zone and a waste gas treatment emission zone. The tower body is the main part of the distillation tower and is used to separate substances. The base frame supports the entire tower body and ensures its stability. The heating zone is usually located at the bottom of the tower body and is responsible for providing heat to evaporate the liquid. The furfural distillation zone is the area where the actual separation of substances occurs. The waste gas treatment emission zone is responsible for treating the waste gas generated during the distillation process.

[0003] The existing distillation tower does not have a stirring mechanism. For example, a distillation tower for furfural production disclosed in application number 202221575083.3 does not have a uniform heating and stirring structure inside. The heating structure only has a low tower and poor heating effect. The heating of the furfural liquid suffers from uneven heating. At the same time, the heat of the evaporated vapor cannot be completely recovered, resulting in a waste of heat energy. Therefore, the utility model proposes a distillation tower for furfural production to solve the problems existing in the prior art. Utility Model Content

[0004] In view of the above problems, the purpose of the utility model is to propose a distillation tower for furfural production, which arranges electric heating tubes on the multi-layer dividing plates so that the heating temperature of each layer can be controlled at different temperatures, and the stirring rod is arranged so that the furfural liquid entering the tower body can be evenly and fully heated, thereby avoiding the problem of uneven heating of the furfural liquid in the bottom heating of the traditional distillation tower. At the same time, the steam heat energy can be fully recovered and utilized through the multiple groups of inclined plates of the heat exchange condensation mechanism in combination with the heat exchange coils, thereby avoiding the loss of heat energy.

[0005] To achieve the purpose of the utility model, the utility model is implemented through the following technical solutions: a distillation tower for furfural production, including a tower body, a distillation mechanism, a heat exchange condensation mechanism, a purification mechanism, a temperature sensor, a pressure sensor, an air pressure pump and a main control machine, wherein the lower end of the tower body is provided with a distillation mechanism, the upper end is provided with a heat exchange condensation mechanism, the upper end of the tower body is provided with a purification mechanism, the tower body is distributed with temperature sensors and pressure sensors, an air pressure pump is provided on one side of the tower body, and a main control machine is provided below the side of the tower body for intelligent and automatic control of the entire tower body, the The distillation mechanism includes an extension cylinder, a layer plate mechanism, a rotating shaft frame, a driving motor, an annular groove and a stirring rod. The extension cylinder is fixedly arranged at the bottom end of the tower body, and a layer plate mechanism is distributed between the side of the extension cylinder and the inner wall of the tower body. The layer plate mechanism is detachably distributed in multiple groups. A rotating shaft frame is arranged in the extension cylinder, and the rotating shaft frame and the extension cylinder are rotatably connected by a bearing seal. The bottom surface of the tower body is arranged with a driving motor, and an annular groove is arranged on the layer plate mechanism. A stirring rod is arranged on the side surface of the upper end of the rotating shaft frame corresponding to the position of the annular groove, and an extension rod is arranged on the side of the stirring rod above each layer of the layer plate mechanism.

[0006] Further improvements are: the output end of the driving motor is connected to the rotating shaft frame for transmission, the layer plate mechanism includes a separation layer plate, a packing layer, a through hole and an electric heating tube, separation layers are evenly distributed between the side of the extension tube and the inner wall of the tower body, the separation layer plate is detachably arranged in the tower body, a packing layer is arranged on the upper side of the separation layer plate, through holes are arranged through the separation layer plate and the packing layer for overflow of furfural liquid, electric heating tubes are arranged on the separation layer plates, and each layer of the separation layer plates is provided with a disc-shaped electric heating tube, and the heating temperature can be controlled separately, the annular groove is arranged on the separation layer plate, and the electric heating tube is electrically connected to the main control machine.

[0007] Further improvements are as follows: the heat exchange condensation mechanism includes inclined baffles, heat exchange coils, a liquid collecting tank and a liquid outlet pipe. The inclined baffles are symmetrically distributed on the upper inner part of the tower body. The inclined baffles are arranged in multiple layers, which can buffer the rising steam and increase the heat exchange efficiency. The heat exchange coils are distributed in the inclined baffles, and the liquid collecting tank is distributed below the inclined baffles. The outer side of the tower body is connected to the liquid collecting tank at a horizontal position. The liquid collecting tank is provided with a liquid outlet pipe, and the heat exchange coil is connected to an external water pipe.

[0008] Further improvements are: the purification mechanism includes a pressure relief valve, a purification bin, a purification material box and an exhaust port, the upper end of the tower body is provided with a purification bin through the pressure relief valve, a purification material box is provided in the purification bin, an exhaust port is provided above the purification bin, the pressure relief valve is electrically connected to the main control machine, and cooperates with the air pressure pump to realize the regulation and control of the internal pressure of the tower body.

[0009] A further improvement is that: the side of the purification bin is an open structure, the purification material box is installed in the purification bin through the opening seal, and a protective top cover is provided above the exhaust port.

[0010] A further improvement is that a feeding port and an alkali adding port are arranged at the bottom of the tower body, and electric control valves are arranged on the outer sides of the feeding port and the alkali adding port. The electric control valve, drive motor, temperature sensor, pressure sensor and air pressure pump are all electrically connected to the main control machine, and the air pressure pump is connected to the inside of the tower body.

[0011] The beneficial effects of the utility model are as follows: the utility model arranges electric heating tubes on the multi-layer dividing plates, so that the heating temperature of each layer can be controlled at different temperatures, and the stirring rod is arranged in combination so that the furfural liquid entering the tower body can be evenly and fully heated, avoiding the problem of uneven heating of the furfural liquid in the bottom heating of the traditional distillation tower. At the same time, the steam heat energy can be fully recovered and utilized through the multiple groups of inclined plates of the heat exchange condensation mechanism in combination with the heat exchange coil, avoiding the loss of heat energy, and greatly improving the practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is the front view of the utility model.

[0013] Figure 2 It is the main sectional structural diagram of the utility model.

[0014] Figure 3 This is an enlarged structural diagram of point A of the utility model.

[0015] Among them: 1. tower body; 2. temperature sensor; 3. pressure sensor; 4. air pressure pump; 5. main control machine; 6. extension tube; 7. rotating shaft frame; 8. driving motor; 9. annular groove; 10. stirring rod; 11. partition plate; 12. packing layer; 13. through hole; 14. electric heating tube; 15. inclined baffle; 16. heat exchange coil; 17. liquid collecting tank; 18. liquid outlet pipe; 19. pressure relief valve; 20. purification chamber; 21. purification material box; 22. exhaust port; 23. protective top cover; 24. feeding port; 25. alkali adding port; 26. electric control valve. DETAILED DESCRIPTION

[0016] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with an embodiment. The embodiment is only used to explain the present invention and does not constitute a limitation on the protection scope of the present invention.

[0017] according to Figure 1 , Figure 2 and Figure 3As shown, this embodiment provides a distillation tower for furfural production, including a tower body 1, a distillation mechanism, a heat exchange condensation mechanism, a purification mechanism, a temperature sensor 2, a pressure sensor 3, an air pressure pump 4 and a main control machine 5. The lower end of the tower body 1 is provided with a distillation mechanism, the upper end is provided with a heat exchange condensation mechanism, the upper end of the tower body 1 is provided with a purification mechanism, the tower body 1 is distributed with a temperature sensor 2 and a pressure sensor 3, an air pressure pump 4 is provided on one side of the tower body 1, and a main control machine 5 is provided below the side of the tower body 1 for intelligent automatic control of the entire tower body. The distillation mechanism includes an extension cylinder 6, a layer plate mechanism , a rotating shaft frame 7, a driving motor 8, an annular groove 9 and a stirring rod 10, an extension cylinder 6 is fixedly arranged at the bottom end of the tower body 1, a layer plate mechanism is distributed between the side of the extension cylinder 6 and the inner wall of the tower body 1, and the layer plate mechanism is detachable and distributed in multiple groups, a rotating shaft frame 7 is arranged in the extension cylinder 6, and the rotating shaft frame and the extension cylinder are rotatably connected with the bearing seal, a driving motor 8 is arranged on the bottom surface of the tower body 1, an annular groove 9 is arranged on the layer plate mechanism, a stirring rod 10 is arranged on the side surface of the upper end of the rotating shaft frame 7 corresponding to the position of the annular groove 9, and an extension rod is arranged on the side of the stirring rod above each layer of the layer plate mechanism for uniform stirring.

[0018] The output end of the driving motor 8 is connected to the rotating shaft frame 7 for transmission. The layer plate mechanism includes a separation layer plate 11, a packing layer 12, a through hole 13 and an electric heating tube 14. The separation layer plates 11 are evenly distributed between the side of the extension tube 6 and the inner wall of the tower body 1. The separation layer plates are detachably arranged in the tower body. The packing layer 12 is arranged on the upper side of the separation layer plate 11. The through hole 13 is arranged through the separation layer plate 11 and the packing layer 12 for overflow of furfural liquid. The electric heating tube 14 is arranged on the separation layer plate 11. The electric heating tube is arranged in a disc shape on each separation layer plate, and the heating temperature can be controlled separately. The annular groove 9 is arranged on the separation layer plate 11, and the electric heating tube 14 is electrically connected to the main control machine 5.

[0019] The heat exchange condensation mechanism includes an inclined baffle 15, a heat exchange coil 16, a liquid collecting tank 17 and a liquid outlet pipe 18. The inclined baffles 15 are symmetrically distributed on the upper part of the tower body 1. The inclined baffles are provided with multiple layers, which can buffer the rising steam and increase the heat exchange efficiency. The heat exchange coil 16 is distributed in the inclined baffle 15 to achieve full recovery of heat energy. The liquid collecting tank 17 is distributed below the inclined baffle 15 to collect and output the condensed furfural fine liquid. The outer side of the tower body 1 is horizontally connected to the liquid collecting tank 17. The liquid collecting tank 17 is provided with a liquid outlet pipe 18, and the heat exchange coil 16 is connected to an external water pipe.

[0020] The purification mechanism includes a pressure relief valve 19, a purification bin 20, a purification material box 21 and an exhaust port 22. The upper end of the tower body 1 is provided with a purification bin 20 through the pressure relief valve 19. The purification bin 20 is provided with a purification material box 21. The exhaust port 22 is provided above the purification bin 20. The pressure relief valve 19 is electrically connected to the main control machine 5, and cooperates with the air pressure pump to realize the regulation and control of the internal pressure of the tower body.

[0021] The side of the purification bin 20 is an open structure, the purification material box 21 is installed in the purification bin 20 through the opening seal, and a protective top cover 23 is provided above the exhaust port 22.

[0022] A feeding port 24 and an alkali adding port 25 are provided at the bottom of the tower body 1, and an electric control valve 26 is provided on the outer side of the feeding port 24 and the alkali adding port 25. The electric control valve 26, the driving motor 8, the temperature sensor 2, the pressure sensor 3 and the air pressure pump 4 are all electrically connected to the main control machine 5, and the air pressure pump 4 is connected to the inner part of the tower body.

[0023] When the furfural production distillation tower is used, the furfural stock solution is injected into the tower body through the feed port, and then the electric heating tube and the driving motor are started at the same time. The driving motor drives the stirring rod to rotate to stir the furfural stock solution, and the electric heating tubes on the multi-layer separation plate are used to achieve uniform and sufficient heating. After heating, the evaporated furfural steam is blocked by the inclined baffle plate and fully exchanges heat with the heat exchange tube, and the heat energy is fully recovered. The condensed furfural refined liquid flows down along the inclined baffle plate and drips into the liquid collecting tank below, and flows through the liquid collecting tank to the outer liquid outlet pipe for output. During refined extraction, the neutralizing alkali is added through the alkali adding port to promote the reaction.

[0024] The entire distillation tower is intelligently controlled by the main control machine, and the electronically controlled valves, temperature sensors and pressure sensors make the internal distillation conditions more precisely controlled.

[0025] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A distillation tower for furfural production, characterized in that: The tower body (1) comprises a tower body (1), a distillation mechanism, a heat exchange condensation mechanism, a purification mechanism, a temperature sensor (2), a pressure sensor (3), an air pressure pump (4) and a main control machine (5); the tower body (1) has a distillation mechanism at the lower end, a heat exchange condensation mechanism at the upper end, a purification mechanism at the upper end of the tower body (1), a temperature sensor (2) and a pressure sensor (3) distributed inside the tower body (1), an air pressure pump (4) on one side of the tower body (1), a main control machine (5) at the lower side of the tower body (1), and the distillation mechanism The tower body (1) comprises an extension tube (6), a layer plate mechanism, a rotating shaft frame (7), a driving motor (8), an annular groove (9) and a stirring rod (10); the extension tube (6) is provided at the bottom end of the inner side of the tower body (1); the layer plate mechanism is distributed between the side of the extension tube (6) and the inner wall of the tower body (1); the rotating shaft frame (7) is provided in the extension tube (6); the bottom surface of the tower body (1) is provided with a driving motor (8); the layer plate mechanism is provided with an annular groove (9); and a stirring rod (10) is provided on the side surface of the upper end of the rotating shaft frame (7) corresponding to the position of the annular groove (9).

2. A distillation tower for furfural production according to claim 1, characterized in that: The output end of the driving motor (8) is connected to the rotating shaft frame (7) for transmission, and the layer plate mechanism comprises a separation layer plate (11), a packing layer (12), a through hole (13) and an electric heating tube (14). The separation layer plate (11) is evenly distributed between the side of the extension tube (6) and the inner wall of the tower body (1), and the packing layer (12) is provided on the upper side of the separation layer plate (11). The separation layer plate (11) and the packing layer (12) are provided with a through hole (13). The separation layer plate (11) is provided with an electric heating tube (14), and the annular groove (9) is provided on the separation layer plate (11). The electric heating tube (14) is electrically connected to the main control machine (5).

3. A distillation tower for furfural production according to claim 1, characterized in that: The heat exchange condensation mechanism comprises an inclined baffle (15), a heat exchange coil (16), a liquid collecting tank (17) and a liquid outlet pipe (18); the inclined baffles (15) are symmetrically distributed on the upper part of the tower body (1), the heat exchange coil (16) is distributed in the inclined baffles (15), the liquid collecting tank (17) is distributed below the inclined baffles (15), the outer side of the tower body (1) is connected to the liquid collecting tank (17) at a horizontal position, the liquid collecting tank (17) is provided with a liquid outlet pipe (18), and the heat exchange coil (16) is connected to an external water pipe.

4. A distillation tower for furfural production according to claim 1, characterized in that: The purification mechanism comprises a pressure relief valve (19), a purification chamber (20), a purification material box (21) and an exhaust port (22); the upper end of the tower body (1) is provided with a purification chamber (20) through the pressure relief valve (19); the purification material box (21) is provided in the purification chamber (20); the exhaust port (22) is provided above the purification chamber (20); and the pressure relief valve (19) is electrically connected to a main control machine (5).

5. A distillation tower for furfural production according to claim 4, characterized in that: The side of the purification bin (20) is an open structure, the purification material box (21) is installed in the purification bin (20) through the opening seal, and a protective top cover (23) is provided above the exhaust port (22).

6. A distillation tower for furfural production according to claim 1, characterized in that: The bottom end of the tower body (1) is provided with a feeding port (24) and an alkali feeding port (25); the outer sides of the feeding port (24) and the alkali feeding port (25) are both provided with an electric control valve (26); the electric control valve (26), the drive motor (8), the temperature sensor (2), the pressure sensor (3) and the air pressure pump (4) are all electrically connected to the main control machine (5); and the air pressure pump (4) is communicated with the interior of the tower body (1).

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