Trifluoroacetic acid recovery device and method

Abstract

The invention discloses a trifluoroacetic acid recovery device and method, and relates to the technical field of trifluoroacetic acid recovery devices.The trifluoroacetic acid recovery device comprises a supporting plate, fixing plates and supporting frames, two dehydration tanks are symmetrically installed between the two fixing plates, and the two dehydration tanks are located between the two supporting frames; the supporting plate is provided with a switching mechanism used for switching the dewatering tank without shutdown, and one end of the supporting plate is provided with a storage mechanism used for storing water. Through the switching mechanism, moisture in gaseous trifluoroacetic acid can be adsorbed through the molecular sieves in the inner cavities of the dehydration tanks, so that the moisture in the gaseous trifluoroacetic acid can be removed, and when the molecular sieves are used for a long time and are difficult to efficiently adsorb the moisture, the two dehydration tanks are switched without shutdown, so that the moisture in the gaseous trifluoroacetic acid can be removed. Therefore, the purpose of conveniently replacing the molecular sieve can be achieved, and the recycling efficiency of the trifluoroacetic acid waste liquid is further improved.

Description

Technical Field

[0001] This invention relates to the technical field of trifluoroacetic acid recovery devices, specifically a trifluoroacetic acid recovery device and method. Background Technology

[0002] Trifluoroacetic acid (TFA) is a colorless liquid with a pungent odor and strong acidity. It is mainly used in organic synthesis, as a catalyst, and as a solvent. Due to its high price and environmental hazards, distillation is a popular method to recover trifluoroacetic acid. This not only effectively reduces raw material consumption, lowers costs, and improves economic efficiency, but also reduces the emission of harmful substances and protects the ecological environment.

[0003] Existing trifluoroacetic acid (TCA) recovery devices require a dehydrating agent (e.g., molecular sieve) to adsorb moisture from the gaseous TCA produced by distillation during operation. However, this dehydrating agent needs regeneration via heating after prolonged use to reduce the cost of TCA recovery. During regeneration, the dehydrating agent struggles to adsorb moisture, necessitating replacement. This replacement requires stopping the delivery of gaseous TCA, making dehydration impossible. To address this issue and improve the efficiency of TCA waste recovery by enabling continuous switching of the molecular sieve, a TCA recovery device and method are provided, eliminating the drawbacks of existing devices. Summary of the Invention

[0004] The purpose of this invention is to provide a trifluoroacetic acid recovery device and method to solve the problems in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A trifluoroacetic acid recovery device includes a support plate, two fixed plates symmetrically fixed to the outer wall of the support plate, the two fixed plates being located at the upper and lower ends of the support plate respectively, two support frames symmetrically fixed to the outer wall of one of the fixed plates, the two support frames being located on both sides of the other fixed plate respectively, the two support frames being fixedly connected to the other fixed plate, two dehydration tanks symmetrically installed between the two fixed plates, the two dehydration tanks being located between the two support frames, and a switching mechanism for switching the dehydration tanks without stopping the machine is provided on the support plate;

[0007] One end of the support plate is provided with a storage mechanism for storing water.

[0008] Based on the above technical solutions, the present invention also provides the following optional technical solutions:

[0009] In one alternative embodiment, the switching mechanism includes a first switching component disposed at one end of the support plate;

[0010] The first switching assembly includes: a transmission rod disposed at one end of a support plate, the transmission rod being located between two dehydration tanks; two fixed plates being sleeved on the outer wall of the transmission rod; the transmission rod and the two fixed plates being rotatably connected by bearings; two first switching cylinders being symmetrically fixedly connected to the outer wall of the transmission rod via a connecting shaft; the two first switching cylinders being located at the upper and lower ends of the transmission rod, respectively; the two first switching cylinders being located at the ends of the two fixed plates that are far apart from each other; two first guide grooves being symmetrically formed on the outer wall of each of the two first switching cylinders; the inner cavities of the two first guide grooves being interconnected; and a second guide groove being formed at the end of each of the two first switching cylinders that is far apart from the transmission rod; the inner cavity of the second guide groove being interconnected with the inner cavities of the two first guide grooves.

[0011] The support plate is provided with a drive assembly, which is used to drive the transmission rod to rotate.

[0012] In one alternative embodiment: the drive assembly includes: a motor mounted on the support plate at the end away from the transmission rod, the output end of the motor being fixedly connected to a bevel gear, the bevel gear being located at the end of the support plate away from the motor, the outer wall of the bevel gear being meshed with a bevel gear ring, the bevel gear ring being sleeved on the outer wall of the transmission rod, and the bevel gear ring being fixedly connected to the transmission rod;

[0013] The transmission rod is equipped with a first conveying component.

[0014] In one alternative embodiment: the first conveying assembly includes: two fixed seats symmetrically arranged on the outside of the transmission rod, the two fixed seats being slidably sleeved on the outer walls of the two first switching drums, the two fixed seats being rotatably connected to the transmission rod, the two fixed seats being fixedly connected to the two fixed plates, and an air supply pipe being installed at the end of each of the two fixed seats away from the dehydration tank; two fourth guide grooves are symmetrically opened inside the two fixed seats, and two fifth guide grooves are symmetrically opened at one end of one fixed seat, the two fifth guide grooves being located on the side of the two fourth guide grooves that are far apart from each other;

[0015] A second switching component is provided on the fixed base.

[0016] In one alternative embodiment: the second switching assembly includes two second switching cylinders symmetrically arranged inside the fixed base, both second switching cylinders being rotatably connected to the fixed base, each of the two second switching cylinders having a third guide groove, the inner wall of the third guide groove being L-shaped, the port of the third guide groove on one second switching cylinder being aligned with the port of a fourth guide groove, and the port of the third guide groove on the other second switching cylinder being aligned with the port of a fifth guide groove;

[0017] A transmission assembly is provided on the fixed base.

[0018] In one alternative embodiment: the transmission assembly includes: two spur gears symmetrically arranged at the end of the fixed base away from the dehydration tank; the two spur gears are respectively fixedly connected to two second switching drums via connecting shafts; a transmission gear ring is arranged between the two spur gears; the transmission gear ring meshes with the two spur gears; the transmission gear ring is located outside the air supply pipe; and two connecting sliders are symmetrically fixedly connected at the end of the transmission gear ring near the first switching drum; both connecting sliders pass through the fixed base and are fixedly connected to the first switching drum.

[0019] In one alternative embodiment, the storage mechanism includes a second conveying component disposed at one end of a fixed base;

[0020] The second conveying assembly includes: a second guide tube installed at one end of a fixed base, the two ends of the second guide tube being located at the ends of two fifth guide grooves respectively, a first guide tube being fixedly connected to the end of the second guide tube away from the fixed base, and the inner cavity of the second guide tube communicating with the inner cavities of the fifth guide groove and the first guide tube respectively;

[0021] A condensation assembly is provided at the bottom end of the first guide tube.

[0022] In one alternative embodiment: the condensation assembly is a housing installed at the bottom end of the first guide tube;

[0023] A water storage component is installed at the bottom of the outer casing.

[0024] In one alternative: the water storage component is a water tank installed at the bottom of the casing.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0026] 1. This invention, through a switching mechanism, enables the adsorption of moisture in gaseous trifluoroacetic acid by a molecular sieve within the dehydration tank, thereby removing moisture from the gaseous trifluoroacetic acid. When the molecular sieve becomes inefficient in adsorbing moisture after prolonged use, the two dehydration tanks can be switched without shutting down, allowing for convenient replacement of the molecular sieve and further improving the efficiency of trifluoroacetic acid waste liquid recycling.

[0027] 2. The present invention, through a storage mechanism, enables the water in the molecular sieve to be separated from the molecular sieve by evaporating into water vapor under high temperature through heating. Then, the water vapor is condensed into liquid and stored, thereby achieving the purpose of recycling excess water. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the present invention.

[0029] Figure 2 This is a schematic diagram of the connection structure between the support plate and the drive assembly of the present invention.

[0030] Figure 3 This is a schematic diagram of the switching mechanism structure of the present invention.

[0031] Figure 4 This is a schematic diagram of the internal structure of the first switching drum of the present invention.

[0032] Figure 5 This is a schematic diagram of the connection structure between the fixed base and the storage mechanism of the present invention.

[0033] Figure 6 This is a schematic diagram of the internal structure of the fixing base of the present invention.

[0034] Figure 7 This is a schematic diagram of the connection structure between the support plate and the fixing plate of the present invention.

[0035] Figure reference numerals: 1. Support plate; 201. First guide groove; 202. First switching drum; 203. Transmission rod; 204. Bevel gear ring; 205. Second guide groove; 206. Second switching drum; 207. Third guide groove; 208. Spur gear; 209. Transmission gear ring; 2010. Connecting slider; 2011. Motor; 2012. Bevel gear; 2013. Air supply pipe; 2014. Fixed seat; 2015. Fourth guide groove; 2016. Fifth guide groove; 301. First guide tube; 302. Second guide tube; 303. Outer shell; 304. Water storage tank; 305. Drain pipe; 4. Support frame; 5. Fixed plate; 6. Dehydration tank. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0037] In one embodiment, such as Figures 1-7 As shown, a trifluoroacetic acid recovery device includes a support plate 1. Two fixed plates 5 are symmetrically fixedly connected to the outer wall of the support plate 1. The two fixed plates 5 are located at the upper and lower ends of the support plate 1, respectively. Two support frames 4 are symmetrically fixedly connected to the outer wall of one fixed plate 5. The two support frames 4 are located on both sides of the other fixed plate 5. The two support frames 4 are fixedly connected to the other fixed plate 5. Two dehydration tanks 6 are symmetrically installed between the two fixed plates 5. The two dehydration tanks 6 are located between the two support frames 4. Each of the two dehydration tanks 6 is equipped with an electric heating tube. The electric heating tube is electrically connected to an external controller through a wire. Each of the two dehydration tanks 6 stores molecular sieves inside. The support plate 1 is provided with a switching mechanism for switching the dehydration tanks 6 without stopping the machine.

[0038] The switching mechanism includes: a first switching component disposed at one end of the support plate 1;

[0039] The first switching assembly includes: a transmission rod 203 disposed at one end of a support plate 1, the transmission rod 203 being located between two dehydration tanks 6, two fixing plates 5 being sleeved on the outer wall of the transmission rod 203, the transmission rod 203 being rotatably connected to the two fixing plates 5 via bearings, two first switching cylinders 202 being symmetrically fixedly connected to the outer wall of the transmission rod 203 via connecting shafts, the two first switching cylinders 202 being located at the upper and lower ends of the transmission rod 203 respectively, the two first switching cylinders 202 being located at the ends of the two fixing plates 5 that are far apart from each other, two first guide grooves 201 being symmetrically opened on the outer wall of each of the two first switching cylinders 202, the inner cavities of the two first guide grooves 201 being interconnected, and a second guide groove 205 being opened at the end of each of the two first switching cylinders 202 that is far away from the transmission rod 203, the inner cavity of the second guide groove 205 being interconnected with the inner cavity of the two first guide grooves 201;

[0040] A drive assembly is provided on the support plate 1, which is used to drive the transmission rod 203 to rotate.

[0041] One end of the support plate 1 is provided with a storage mechanism for storing water;

[0042] In this embodiment, during use, gaseous trifluoroacetic acid produced by crude distillation is transported to the inner cavity of a dehydration tank 6 through a switching mechanism. At this time, the water in the gaseous trifluoroacetic acid is adsorbed by the molecular sieve in the inner cavity of the dehydration tank 6, thereby removing the water from the gaseous trifluoroacetic acid. Afterwards, the dehydration tank 6 transports the water-removed gaseous trifluoroacetic acid to subsequent devices for condensation, extraction and other operations through the switching mechanism.

[0043] When the molecular sieve in the inner cavity of a dehydration tank 6 becomes difficult to efficiently adsorb water after long-term use, the drive assembly drives the transmission rod 203 to rotate. At this time, the two first switching drums 202 rotate along the inner wall of the first switching groove under the drive of the transmission rod 203 via the connecting shaft.

[0044] During this process, the molecular sieve in the inner cavity of another dehydration tank 6 can adsorb the water in gaseous trifluoroacetic acid through the switching mechanism, thereby achieving the purpose of switching between the two dehydration tanks 6 without stopping the machine, thereby further improving the efficiency of recycling trifluoroacetic acid waste liquid.

[0045] Then, the heating element is activated by an external controller to heat the molecular sieve in the inner cavity of a dehydration tank 6. At this time, the water in the molecular sieve is separated from the molecular sieve by evaporating into water vapor under high temperature. Then, a second switching drum 206 conveys the water vapor to the inner cavity of the storage mechanism through a conveying pipe, a third guide groove 207 and a fifth guide groove 2016. The water vapor is then condensed and stored by the storage mechanism, so that excess water can be recycled.

[0046] In one embodiment, such as Figures 1-4 As shown, the drive assembly includes: a motor 2011 mounted on the support plate 1 at the end away from the transmission rod 203; a bevel gear 2012 fixedly connected to the output end of the motor 2011; the bevel gear 2012 located at the end of the support plate 1 away from the motor 2011; a bevel gear ring 204 meshing with the outer wall of the bevel gear 2012; the bevel gear ring 204 sleeved on the outer wall of the transmission rod 203; the bevel gear ring 204 fixedly connected to the transmission rod 203; and the drive assembly is used to drive the transmission rod 203 to rotate, thereby providing rotational power to the transmission rod 203.

[0047] The transmission rod 203 is equipped with a first conveying assembly;

[0048] In one embodiment, such as Figures 1-6As shown, the first conveying assembly includes: two fixed seats 2014 symmetrically arranged on the outside of the transmission rod 203; the two fixed seats 2014 are slidably sleeved on the outer walls of the two first switching drums 202; the two fixed seats 2014 are rotatably connected to the transmission rod 203; the two fixed seats 2014 are fixedly connected to the two fixed plates 5; an air supply pipe 2013 is installed at the end of each fixed seat 2014 away from the dehydration tank 6; two fourth guide grooves 2015 are symmetrically opened inside the two fixed seats 2014; and one of the fixed seats 2014 has a... Two fifth guide grooves 2016 are symmetrically opened at the ends. The two fifth guide grooves 2016 are respectively located on the side of the two fourth guide grooves 2015 that are far apart from each other. A first switching groove is opened at the position where the fixed base 2014 connects with the first switching drum 202. Two sealing rings are symmetrically arranged on the outer wall of the first switching drum 202 and connect with the inner wall of the first switching groove. The inner cavity of the two fourth guide grooves 2015 is interconnected with the inner cavity of the first switching groove. The first switching groove is used to allow the fourth guide grooves 2015 to rotate in the inner cavity of the fixed base 2014.

[0049] A second switching component is provided on the mounting base 2014;

[0050] In one embodiment, such as Figures 2-6 As shown, the second switching assembly includes two second switching cylinders 206 symmetrically arranged inside the fixed base 2014. Both second switching cylinders 206 are rotatably connected to the fixed base 2014. Each second switching cylinder 206 has a third guide groove 207, the inner wall of which is L-shaped. The port of the third guide groove 207 on one second switching cylinder 206 is aligned with the port of a fourth guide groove 2015, and the port of the third guide groove 207 on the other second switching cylinder 206 is aligned with the port of a fifth guide groove 2016. The fixed base 2014 and the two second switching cylinders 206 are connected... A second switching groove is provided at the joint position of the switching drum 206. Two sealing rings are symmetrically arranged on the outer wall of the second switching drum 206 at the joint position with the inner wall of the second switching groove. The inner cavities of the two fourth guide grooves 2015 and the two fifth guide grooves 2016 are respectively connected to the inner cavities of the two second switching grooves. The two fixed seats 2014 are formed with conveying pipes fixedly connected to the ports of the dehydration tanks 6 at the joint positions of the two fixed seats 2014 and the two dehydration tanks 6. The inner cavity of the conveying pipe is connected to the inner cavity of the third guide groove 207. The two second switching drums 206 can rotate inside the fixed seat 2014 through the second switching groove.

[0051] A transmission assembly is installed on the fixed base 2014;

[0052] In one embodiment, such as Figures 1-4As shown, the transmission assembly includes: two spur gears 208 symmetrically arranged at the end of the fixed base 2014 away from the dehydration tank 6, the two spur gears 208 being fixedly connected to two second switching drums 206 respectively via connecting shafts, a transmission gear ring 209 being arranged between the two spur gears 208, the transmission gear ring 209 meshing with the two spur gears 208, the transmission gear ring 209 being located on the outside of the air supply pipe 2013, two connecting sliders 2010 being symmetrically fixedly connected at the end of the transmission gear ring 209 near the first switching drum 202, both connecting sliders 2010 passing through the fixed base 2014 and fixedly connected to the first switching drum 202, an arc-shaped groove being provided at the contact position between the fixed base 2014 and the connecting slider 2010 for the connecting slider 2010 to slide, the arc-shaped groove being used to limit the movement of the connecting slider 2010, thereby allowing the transmission gear ring 209 to rotate under the drive of the first switching drum 202;

[0053] In one embodiment, such as Figures 1-6 As shown, the storage mechanism includes: a second conveying assembly disposed at one end of a fixed base 2014;

[0054] The second conveying assembly includes: a second guide tube 302 installed at one end of a fixed base 2014, the two ports of the second guide tube 302 being located at the ends of two fifth guide grooves 2016 respectively, a first guide tube 301 being fixedly connected to the end of the second guide tube 302 away from the fixed base 2014, and the inner cavity of the second guide tube 302 communicating with the inner cavities of the fifth guide grooves 2016 and the first guide tube 301 respectively;

[0055] A condenser assembly is provided at the bottom end of the first guide tube 301;

[0056] The condensation assembly is a housing 303 installed at the bottom of the first guide tube 301. A heat exchanger is installed inside the housing 303, and the heat exchanger is electrically connected to an external controller via wires.

[0057] A water storage component is installed at the bottom of the outer casing 303;

[0058] The water storage component is a water storage tank 304 installed at the bottom of the outer casing 303. A drain pipe 305 is fixedly connected to the bottom of the water storage tank 304. An electric valve is installed inside the drain pipe 305. The electric valve is electrically connected to an external controller through a wire. The storage mechanism is used to condense excess water vapor into liquid and continue to store the liquid water, so that the water can be recycled.

[0059] The above embodiment discloses a trifluoroacetic acid recovery device. In use, gaseous trifluoroacetic acid produced by crude distillation is transported to the interior of a fixed base 2014 through a gas supply pipe 2013. At this time, the fixed base 2014 transports the gaseous trifluoroacetic acid to the inner cavity of a second switching drum 206 through a first guide groove 201 and a second guide groove 205 on a first switching drum 202, and through a fourth guide groove 2015. Then, the second switching drum 206 transports the gaseous trifluoroacetic acid to the inner cavity of a dehydration tank 6 through a third guide groove 207 and a conveying pipe. At this time, the water in the gaseous trifluoroacetic acid is adsorbed by the molecular sieve in the inner cavity of the dehydration tank 6, thereby removing the water in the gaseous trifluoroacetic acid.

[0060] Then, the dehydration tank 6 transports the dehydrated gaseous trifluoroacetic acid to the interior of another fixed base 2014 through a conveying pipe. At this time, a second switching drum 206 in the other fixed base 2014 transports the gaseous trifluoroacetic acid through a third guide groove 207 and a fourth guide groove 2015 to the inner cavity of the first switching drum 202. At the same time, the first switching drum 202 transports the gaseous trifluoroacetic acid to subsequent devices for condensation, extraction and other operations through a first guide groove 201, a second guide groove 205 and another gas conveying pipe 2013.

[0061] When the molecular sieve in the inner cavity of a dehydration tank 6 becomes difficult to efficiently adsorb water after long-term use, the motor 2011 is started to drive the bevel gear 2012 to rotate. At the same time, the bevel gear ring 204, driven by the meshing of the bevel gear 2012, drives the transmission rod 203 to rotate. At this time, the two first switching drums 202 rotate along the inner wall of the first switching groove through the connecting shaft driven by the transmission rod 203. Meanwhile, the port of the first guide groove 201 is misaligned with the port of a fourth guide groove 2015 under the drive of the first switching drum 202, until the port of the other first guide groove 201 is aligned with the port of the other fourth guide groove 2015 under the drive of the first switching drum 202.

[0062] During this process, the transmission gear ring 209 rotates under the drive of the first switching drum 202 via two connecting sliders 2010. At this time, the two spur gears 208 rotate in opposite directions under the meshing drive of the transmission gear ring 209. Simultaneously, the two second switching drums 206 rotate along the inner wall of the second switching groove under the drive of the two spur gears 208 via connecting shafts. At this time, the third guide groove 207 on one second switching drum 206 is misaligned with the port of a fourth guide groove 2015 under the drive of one second switching drum 206. At the same time, the third guide groove 207 on the other second switching drum 206 is aligned with the port of another fourth guide groove 2015 under the drive of the other second switching drum 206. Thus, the water in the gaseous trifluoroacetic acid can be adsorbed by the molecular sieve in the inner cavity of the other dehydration tank 6, thereby achieving the purpose of switching the two dehydration tanks 6 without stopping the machine, thereby further improving the efficiency of trifluoroacetic acid waste liquid recycling.

[0063] Then, the heating element is activated by an external controller to heat the molecular sieve inside a dehydration tank 6. At this time, the water in the molecular sieve evaporates into water vapor under high temperature and separates from the molecular sieve. Then, a second switching drum 206 transports the water vapor to the inner cavity of the second guide pipe 302 through a conveying pipe, a third guide groove 207 and a fifth guide groove 2016. At this time, the second guide pipe 302 transports the water vapor to the inner cavity of the outer shell 303 through the first guide pipe 301. At the same time, the heat exchanger is activated by the external controller to condense the water vapor. Then, the condensed liquid water is transported to the inner cavity of the water storage tank 304 for storage. When water is needed, the electric valve is opened by the external controller, and the water in the inner cavity of the water storage tank 304 is transported through the drain pipe 305. In this way, excess water can be recycled.

[0064] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A trifluoroacetic acid recovery device, comprising a support plate (1), wherein two fixing plates (5) are symmetrically fixedly connected to the outer wall of the support plate (1), the two fixing plates (5) are respectively located at the upper and lower ends of the support plate (1), two support frames (4) are symmetrically fixedly connected to the outer wall of one fixing plate (5), the two support frames (4) are respectively located on both sides of the other fixing plate (5), the two support frames (4) are fixedly connected to the other fixing plate (5), and two dehydration tanks (6) are symmetrically installed between the two fixing plates (5), the two dehydration tanks (6) are located between the two support frames (4), characterized in that, The support plate (1) is provided with a switching mechanism for switching the dehydration tank (6) without stopping the machine; One end of the support plate (1) is provided with a storage mechanism for storing water.

2. The trifluoroacetic acid recovery device according to claim 1, characterized in that, The switching mechanism includes: a first switching component disposed at one end of the support plate (1); The first switching assembly includes: a transmission rod (203) disposed at one end of a support plate (1), the transmission rod (203) being located between two dehydration tanks (6), two fixing plates (5) being sleeved on the outer wall of the transmission rod (203), the transmission rod (203) being rotatably connected to the two fixing plates (5) via bearings, and two first switching cylinders (202) being symmetrically fixedly connected to the outer wall of the transmission rod (203) via connecting shafts, the two first switching cylinders (202) being located at the transmission rod (203) respectively. 3) At the upper and lower ends, the two first switching drums (202) are respectively located at the ends of the two fixed plates (5) that are far apart from each other. The outer walls of the two first switching drums (202) are symmetrically provided with two first guide grooves (201). The inner cavities of the two first guide grooves (201) are interconnected. The ends of the two first switching drums (202) that are far away from the transmission rod (203) are provided with second guide grooves (205). The inner cavity of the second guide groove (205) is interconnected with the inner cavity of the two first guide grooves (201). The support plate (1) is provided with a drive assembly, which is used to drive the transmission rod (203) to rotate.

3. The trifluoroacetic acid recovery device according to claim 2, characterized in that, The drive assembly includes: a motor (2011) installed on the support plate (1) at the end away from the transmission rod (203), a bevel gear (2012) fixedly connected to the output end of the motor (2011), the bevel gear (2012) being located at the end of the support plate (1) away from the motor (2011), a bevel gear ring (204) meshing with the outer wall of the bevel gear (2012), the bevel gear ring (204) being sleeved on the outer wall of the transmission rod (203), and the bevel gear ring (204) being fixedly connected to the transmission rod (203); The transmission rod (203) is provided with a first conveying component.

4. The trifluoroacetic acid recovery device according to claim 3, characterized in that, The first conveying assembly includes: two fixed seats (2014) symmetrically arranged on the outside of the transmission rod (203), the two fixed seats (2014) being slidably sleeved on the outer walls of the two first switching drums (202), the two fixed seats (2014) being rotatably connected to the transmission rod (203), the two fixed seats (2014) being fixedly connected to the two fixed plates (5), and an air supply pipe (2013) being installed at the end of each of the two fixed seats (2014) away from the dehydration tank (6). Two fourth guide grooves (2015) are symmetrically opened inside the two fixed seats (2014), and two fifth guide grooves (2016) are symmetrically opened at one end of one fixed seat (2014). The two fifth guide grooves (2016) are located on the side away from each other of the two fourth guide grooves (2015). A second switching component is provided on the mounting base (2014).

5. A trifluoroacetic acid recovery device according to claim 4, characterized in that, The second switching assembly includes two second switching cylinders (206) symmetrically arranged inside the fixed base (2014). Both second switching cylinders (206) are rotatably connected to the fixed base (2014). Each of the two second switching cylinders (206) is provided with a third guide groove (207). The inner wall of the third guide groove (207) is L-shaped. The port of the third guide groove (207) on one second switching cylinder (206) is aligned with the port of a fourth guide groove (2015). The port of the third guide groove (207) on the other second switching cylinder (206) is aligned with the port of a fifth guide groove (2016). A transmission assembly is provided on the fixed base (2014).

6. A trifluoroacetic acid recovery device according to claim 5, characterized in that, The transmission assembly includes: two spur gears (208) symmetrically arranged at the end of the fixed base (2014) away from the dehydration tank (6), the two spur gears (208) being fixedly connected to two second switching drums (206) respectively via connecting shafts, a transmission gear ring (209) being arranged between the two spur gears (208), the transmission gear ring (209) meshing with the two spur gears (208), the transmission gear ring (209) being located outside the gas supply pipe (2013), and two connecting sliders (2010) symmetrically fixedly connected at the end of the transmission gear ring (209) near the first switching drum (202), both connecting sliders (2010) passing through the fixed base (2014) and fixedly connected to the first switching drum (202).

7. A trifluoroacetic acid recovery device according to claim 1, characterized in that, The storage mechanism includes: A second conveying assembly is disposed at one end of a fixed base (2014); The second conveying assembly includes: a second guide tube (302) installed at one end of a fixed base (2014), the two ports of the second guide tube (302) being located at the ends of two fifth guide grooves (2016) respectively, a first guide tube (301) being fixedly connected to the end of the second guide tube (302) away from the fixed base (2014), and the inner cavity of the second guide tube (302) communicating with the inner cavities of the fifth guide grooves (2016) and the first guide tube (301) respectively; A condensation assembly is provided at the bottom end of the first guide tube (301).

8. A trifluoroacetic acid recovery device according to claim 7, characterized in that, The condensation assembly is a housing (303) installed at the bottom end of the first guide tube (301). A water storage component is installed at the bottom of the outer casing (303).

9. A trifluoroacetic acid recovery device according to claim 8, characterized in that, The water storage component is a water storage tank (304) installed at the bottom of the outer casing (303).

10. A method of using the trifluoroacetic acid recovery device according to any one of claims 1-9, characterized in that, Includes the following steps: Step 1: The trifluoroacetic acid waste liquid is transferred to a distillation tank, where impurities and trifluoroacetic acid are separated from the waste liquid through crude distillation. Step 2: The gaseous trifluoroacetic acid produced by crude distillation is transported to the dehydration tank (6). At this time, the water in the gaseous trifluoroacetic acid is adsorbed by the molecular sieve in the inner cavity of the dehydration tank (6), thereby removing the water in the gaseous trifluoroacetic acid. Step 3: The gaseous trifluoroacetic acid after removing moisture is condensed into liquid through a condenser. The liquid trifluoroacetic acid is then transported to an extraction tank for purification, thereby recovering the trifluoroacetic acid. Step 4: The molecular sieve in the dehydration tank (6) is regenerated by heating. The water in the molecular sieve is evaporated into water vapor at high temperature, and then the water vapor is condensed into liquid and stored through a heat exchanger. Excess water can be recycled.

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