Methanol distillation kettle with preheating and heat preservation functions

Abstract

The utility model discloses a methanol distillation kettle with preheating and heat preservation functions, which comprises a distillation retort shell, an inner distillation retort is fixedly mounted in the distillation retort shell, and a spiral heating pipe is fixedly mounted outside the inner distillation retort; a circulating assembly is arranged at the top of the distillation retort shell and comprises a mounting pad, the top of the mounting pad is fixedly connected with an exhaust fan and an arch frame, the middle of the mounting pad is rotatably connected with a central shaft tube, the top of the arch frame is fixedly connected with a driving motor, and the output end of the driving motor is fixedly connected with a second gear. A plurality of pairs of stirring rods are fixedly connected to the exterior of the central shaft tube, air holes are formed in the exteriors of the stirring rods and the central shaft tube, and a first gear is fixedly connected to the top of the central shaft tube; the mixed liquid can be in full contact with hot air, and the low-temperature mixed liquid is accelerated to heat up due to heat conduction, so that the preheating and heating efficiency of the device is improved, and the distillation efficiency is further improved.

Description

Technical Field

[0001] This utility model relates to the field of chemical production technology, specifically to a methanol distillation kettle with preheating and heat preservation functions. Background Technology

[0002] A methanol distillation system consists of a distillation vessel, a distillation column, and a cooling system. In chemical production applications, methanol distillation systems are frequently required to distill methanol solutions. Currently, the distillation vessel in methanol distillation systems is mainly heated by steam, which suffers from high energy consumption and low heating efficiency. This is because the vessel wall is made of metal, and the steam entering the steam jacket is absorbed by the outer vessel wall and then dissipated. Therefore, improvements to the traditional methanol distillation vessel are necessary.

[0003] Publication No. CN206444220U discloses a preheating methanol distillation kettle, comprising an inner kettle body and an outer kettle body. The upper end of the inner kettle body is equipped with a feed pipe, a discharge pipe, a thermometer, and a pressure gauge. A spiral heating tube is located on the side, connected to a steam inlet pipe and a steam outlet pipe. The spiral heating tube has a semi-circular cross-section. An electric heating block is located on the lower outer side of the inner kettle body. The shapes of the two sides of the electric heating block respectively match the outer end face of the inner kettle body and the inner end face of the outer kettle body. The electric heating block is connected to a power cord. This invention, by setting a spiral heating tube that fits tightly against the side of the inner kettle body, prevents direct contact between the steam and the outer kettle body, reducing heat loss. By setting an electric heating block at the bottom of the inner kettle body, which works in conjunction with the spiral heating tube to preheat the inner kettle body, it helps to improve the distillation efficiency of methanol. However, this patent still has the following problems in practical use:

[0004] The above-mentioned device achieves the function of preheating and heat preservation by setting up inner and outer vessels. However, during heating, the liquid near the outer wall of the inner vessel heats up first, and the liquid near the center of the inner vessel heats up poorly, resulting in a temperature decrease, which affects the distillation efficiency. In particular, during methanol distillation, the temperature of the mixed liquid is lower than the boiling point of water, which leads to slow heating efficiency and distillation efficiency of the device.

[0005] A methanol distillation vessel with preheating and heat preservation functions is proposed to solve the problems mentioned above. Utility Model Content

[0006] The purpose of this invention is to provide a methanol distillation kettle with preheating and heat preservation function, in order to solve the problem mentioned in the background art that the above-mentioned device achieves the function of preheating and heat preservation by setting up inner and outer kettle bodies. However, during heating, the liquid near the outer wall of the inner kettle body heats up first, and the liquid near the center of the inner body heats up poorly, resulting in a temperature decrease, which affects the distillation efficiency. In particular, during methanol distillation, the temperature of the mixed liquid is lower than the boiling point of water, resulting in slow heating efficiency and distillation efficiency of the device.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a methanol distillation kettle with preheating and heat preservation function, comprising a distillation tank shell, an inner distillation tank fixedly installed inside the distillation tank shell, and a spiral heating tube fixedly installed outside the inner distillation tank;

[0008] A circulation assembly is provided on the top of the distillation tank shell. The circulation assembly includes a mounting pad, a blower and an arch frame are fixedly connected to the top of the mounting pad, an air outlet pipe is fixedly connected to the air outlet of the blower, a central shaft tube is rotatably connected to the middle of the mounting pad, the central shaft tube passes through the distillation tank shell and extends into the interior of the distillation tank, a drive motor is fixedly connected to the top of the arch frame, a second gear is fixedly connected to the output end of the drive motor, several pairs of stirring rods are fixedly connected to the outside of the central shaft tube, air holes are opened on the outside of the stirring rods and the central shaft tube, and a first gear is fixedly connected to the top of the central shaft tube.

[0009] The pre-coagulation assembly is provided on the outer side of the distillation tank shell. The pre-coagulation assembly includes a slow-flow tank. A pre-cooling tank is fixedly connected to the top of the slow-flow tank. An exhaust pipe is fixedly connected to the top of the pre-cooling tank. A connecting shell is fixedly connected to the end of the exhaust pipe away from the pre-cooling tank. A support pipe is fixedly connected to the bottom of the connecting shell. A spiral tube is provided inside the pre-cooling tank. A drain pipe is fixedly connected to the bottom of the slow-flow tank.

[0010] Preferably, the mounting pad is fixed to the top of the distillation tank shell, the first gear and the second gear are meshed and connected, the end of the air outlet pipe away from the exhaust fan is rotatably connected to the top of the central shaft tube, and the slow-flow tank is fixed to the top of the outer side of the distillation tank shell.

[0011] Preferably, the air inlet of the exhaust fan is fixedly connected to an air inlet pipe, which passes through the mounting pad and extends into the distillation tank shell.

[0012] Preferably, two circulation pipes are fixedly connected to one side of the precooling tank, the circulation pipes are connected to an external heat pump, and the precooling tank is filled with coolant.

[0013] Preferably, the top end of the spiral tube is fixedly connected to the exhaust pipe, and the bottom end of the spiral tube extends into the slow-flow tank.

[0014] Preferably, a cross-shaped fixing plate is fixedly connected inside the connecting shell, a second motor is fixedly connected to the top of the cross-shaped fixing plate, and a fan blade is fixedly connected to the output end of the second motor.

[0015] Preferably, the support tube passes through the top of the distillation tank shell and is fixedly connected.

[0016] Compared with the prior art, the beneficial effects of this utility model are: This methanol distillation kettle with preheating and heat preservation function allows the mixed liquid to fully contact with hot air, and the low-temperature mixed liquid will accelerate its temperature rise due to heat conduction, resulting in improved preheating and heating efficiency of the device, thereby increasing distillation efficiency. The specific details are as follows:

[0017] 1. The hot air is drawn in through the air inlet pipe by the exhaust fan, then sprayed out through the air outlet pipe and blown into the central shaft tube. Finally, it is blown out from the air holes on the central shaft tube and the stirring rod, so that the mixture can fully contact the hot air. The low temperature mixture will heat up faster due to heat conduction, which will improve the preheating and heating efficiency of the device, thereby improving the distillation efficiency. Furthermore, by starting the drive motor, the second gear drives the first gear to rotate, which in turn causes the central shaft tube to move the stirring rod, ultimately making the temperature of the mixture more uniform and the distillation more complete.

[0018] 2. The second motor rotates the fan blades, which causes the distilled methanol gas to be quickly drawn out of the distillation tank shell. The coolant will cool the gaseous methanol that enters the spiral tube through heat conduction, resulting in partial liquefaction. This reduces the workload of subsequent equipment and improves the efficiency of gaseous methanol liquefaction and collection. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the front structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the front cross-section structure of this utility model;

[0021] Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle;

[0022] Figure 4 for Figure 2 Enlarged structural diagram at point B;

[0023] Figure 5 This is a schematic diagram of the installation structure of the central shaft tube and the stirring rod.

[0024] In the diagram: 1. Distillation tank shell; 101. Distillation inner tank; 102. Spiral heating tube; 2. Circulation assembly; 201. Mounting pad; 202. Exhaust fan; 203. Arch frame; 204. Air inlet pipe; 205. Central shaft pipe; 206. Air outlet pipe; 207. First gear; 208. Drive motor; 209. Second gear; 210. Stirring rod; 211. Vent; 3. Pre-condensation assembly; 301. Slow-flow tank; 302. Pre-cooling tank; 303. Drain pipe; 304. Exhaust pipe; 305. Connecting shell; 306. Support pipe; 307. Spiral tube; 308. Circulation pipe; 309. Cross fixing plate; 310. Second motor; 311. Fan blade. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1 - Figure 5 The present invention provides a technical solution: a methanol distillation kettle with preheating and heat preservation function, including a distillation tank shell 1, an inner distillation tank 101 fixedly installed inside the distillation tank shell 1, and a spiral heating tube 102 fixedly installed outside the inner distillation tank 101.

[0027] A circulation assembly 2 is provided on the top of the distillation tank shell 1. The circulation assembly 2 includes a mounting pad 201. A blower 202 and an arch frame 203 are fixedly connected to the top of the mounting pad 201. An air outlet pipe 206 is fixedly connected to the air outlet of the blower 202. A central shaft tube 205 is rotatably connected to the middle of the mounting pad 201. The central shaft tube 205 passes through the distillation tank shell 1 and extends into the interior of the inner distillation tank 101. A drive motor 208 is fixedly connected to the top of the arch frame 203. A second gear 209 is fixedly connected to the output end of the drive motor 208. Several pairs of stirring rods 210 are fixedly connected to the outside of the central shaft tube 205. Air holes 211 are opened on the outside of the stirring rods 210 and the central shaft tube 205. A first gear 207 is fixedly connected to the top of the central shaft tube 205.

[0028] The distillation tank shell 1 is equipped with a pre-condensing component 3 on its outer side. The pre-condensing component 3 includes a slow-flow tank 301. A pre-cooling tank 302 is fixedly connected to the top of the slow-flow tank 301. An exhaust pipe 304 is fixedly connected to the top of the pre-cooling tank 302. A connecting shell 305 is fixedly connected to the end of the exhaust pipe 304 away from the pre-cooling tank 302. A support pipe 306 is fixedly connected to the bottom of the connecting shell 305. A spiral pipe 307 is provided inside the pre-cooling tank 302. A drain pipe 303 is fixedly connected to the bottom of the slow-flow tank 301. The drain pipe 303 is connected to the subsequent cooling equipment. A valve is installed on the exhaust pipe 304 to prevent heat loss during preheating. A valve pipe is also installed at the bottom of the distillation tank shell 1. When opened, it can provide fresh air to the inside of the distillation tank shell 1 to achieve air pressure balance. The narrow and downward-facing valve pipe can reduce heat loss.

[0029] Mounting pad 201 is fixed to the top of the distillation tank shell 1. The first gear 207 and the second gear 209 are meshed and connected. The end of the air outlet pipe 206 away from the exhaust fan 202 is rotatably connected to the top of the central shaft tube 205. The slow flow tank 301 is fixed to the top of the outer side of the distillation tank shell 1.

[0030] The air inlet of the exhaust fan 202 is fixedly connected to an air inlet pipe 204, which passes through the mounting pad 201 and extends into the distillation tank shell 1.

[0031] Two circulation pipes 308 are fixedly connected to one side of the precooling tank 302. The circulation pipes 308 are connected to an external heat pump. The precooling tank 302 is filled with coolant. The top end of the spiral tube 307 is fixedly connected to the exhaust pipe 304, and the bottom end of the spiral tube 307 extends into the slow-flow tank 301. The external heat pump can realize the circulation and cooling of the coolant. The coolant will cool the gaseous methanol entering the spiral tube 307 through heat conduction, thus causing partial liquefaction.

[0032] A cross-shaped fixing plate 309 is fixedly connected inside the connecting shell 305. A second motor 310 is fixedly connected to the top of the cross-shaped fixing plate 309. A fan blade 311 is fixedly connected to the output end of the second motor 310. The second motor 310 causes the fan blade 311 to rotate, which enables the distilled methanol gas to be quickly drawn out from the distillation tank shell 1.

[0033] The support tube 306 passes through the top of the distillation tank shell 1 and is fixedly connected.

[0034] Working principle: Before using this methanol distillation kettle with preheating and heat preservation function, it is necessary to check the overall condition of the device to ensure that it can operate normally. Figure 1 - Figure 5 As shown, during the preheating process, the spiral heating tube 102 heats the air between the distillation tank shell 1 and the inner distillation tank 101, while the inner distillation tank 101 heats up, thus heating the internal mixture. During this process, the exhaust fan 202 is activated, drawing the heated air in through the air inlet pipe 204, then spraying it out through the air outlet pipe 206 and blowing it into the central shaft tube 205. Finally, the air is blown out from the air holes 211 on the central shaft tube 205 and the stirring rod 210, allowing the mixture to fully contact the hot air. The low-temperature mixture heats up faster due to heat conduction, resulting in improved preheating and heating efficiency of the device, thereby increasing the distillation efficiency. Furthermore, by activating the drive motor 208, the second gear 209 drives the first gear 207 to rotate, which in turn causes the central shaft tube 205 to move the stirring rod 210, ultimately making the temperature of the mixture more uniform and the distillation more complete.

[0035] By starting the second motor 310, the fan blades 311 rotate, causing the distilled methanol gas to be quickly drawn out from the distillation tank shell 1. It then enters the spiral tube 307 through the support pipe 306 and the exhaust pipe 304. The coolant cools the gaseous methanol entering the spiral tube 307 through heat conduction, resulting in partial liquefaction. The methanol then falls into the slow-flow tank 301 and is finally cooled and liquefied again by the subsequent condensation device, reducing the workload of the subsequent equipment and improving the efficiency of gaseous methanol liquefaction and collection.

[0036] Furthermore, the heat pump uses the circulation pipe 308 to cool and rotate the coolant, thus recovering and utilizing waste heat.

[0037] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A methanol distillation kettle with preheating and heat preservation functions, comprising a distillation tank shell (1), a distillation inner tank (101) is fixedly installed inside the distillation tank shell (1), and a spiral heating pipe (102) is fixedly installed outside the distillation inner tank (101); characterized in that Further comprising: A circulating assembly (2) is arranged at the top of the distillation tank shell (1), the circulating assembly (2) comprises a mounting pad (201), an air extractor (202) and an arch (203) are fixedly connected to the top of the mounting pad (201), an air outlet pipe (206) is fixedly connected to the air outlet of the air extractor (202), a central shaft pipe (205) is rotatably connected to the middle of the mounting pad (201), the central shaft pipe (205) penetrates through the distillation tank shell (1) and extends into the inside of the distillation inner tank (101), a driving motor (208) is fixedly connected to the top of the arch (203), a second gear (209) is fixedly connected to the output end of the driving motor (208), a plurality of pairs of stirring rods (210) are fixedly connected to the outside of the central shaft pipe (205), air holes (211) are arranged on the outside of the stirring rods (210) and the central shaft pipe (205), and a first gear (207) is fixedly connected to the top of the central shaft pipe (205); Wherein, a pre-condensation assembly (3) is arranged on the outside of the distillation tank shell (1), the pre-condensation assembly (3) comprises a buffer tank (301), a pre-cooling tank (302) is fixedly connected to the top of the buffer tank (301), an exhaust pipe (304) is fixedly connected to the top of the pre-cooling tank (302), a connecting shell (305) is fixedly connected to the end of the exhaust pipe (304) away from the pre-cooling tank (302), a support pipe (306) is fixedly connected to the bottom of the connecting shell (305), and a spiral pipe (307) is arranged in the inside of the pre-cooling tank (302), and a liquid discharge pipe (303) is fixedly connected to the bottom of the buffer tank (301).

2. The methanol distillation kettle with preheating and heat preservation function according to claim 1, characterized in that: The mounting pad (201) is fixed to the top of the distillation tank shell (1), the first gear (207) is meshingly connected with the second gear (209), the end of the air outlet pipe (206) away from the air extractor (202) is rotatably connected with the top end of the central shaft pipe (205), and the buffer tank (301) is fixed to the top of the outside of the distillation tank shell (1).

3. The methanol distillation kettle with preheating and heat preservation function according to claim 1, characterized in that: An air inlet pipe (204) is fixedly connected to the air inlet of the air extractor (202), and the air inlet pipe (204) penetrates through the mounting pad (201) and extends into the distillation tank shell (1).

4. The methanol distillation kettle with preheating and heat preservation function according to claim 1, characterized in that: Two circulating pipes (308) are fixedly connected to one side of the pre-cooling tank (302), the circulating pipes (308) are connected with an external heat pump, and the pre-cooling tank (302) is filled with cooling liquid.

5. The methanol distillation kettle with preheating and heat preservation function according to claim 1, characterized in that: The top end of the spiral pipe (307) is fixedly connected with the exhaust pipe (304), and the bottom end of the spiral pipe (307) extends into the buffer tank (301).

6. The methanol distillation kettle with preheating and heat preservation function according to claim 1, characterized in that: The inside of the connecting shell (305) is fixedly connected with a cross fixed plate (309), the top of the cross fixed plate (309) is fixedly connected with a second motor (310), and the output end of the second motor (310) is fixedly connected with a fan blade (311).

7. The methanol distillation kettle with preheating and heat preservation function according to claim 5, characterized in that: The support pipe (306) penetrates the top of the distillation tank shell (1) and is fixedly connected.

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