Separation and purification apparatus for epoxy resin curing agent

Abstract

The present application belongs to the technical field of separation and purification, and particularly relates to a kind of separation and purification equipment of epoxy resin curing agent, including equipment frame and distillation tank, and the distillation tank includes primary distillation chamber and secondary distillation chamber, the inside of primary distillation chamber includes storage barrel, lifting mechanism and heating stirring mechanism, the lifting mechanism includes spring pull rod, the spring pull rod is connected with annular connecting table, and the annular connecting table is connected with connecting rod;When primary distillation, a plurality of sliding plates are opened strip through groove, and each liquid leakage hole is arranged on the circumferential lower side of the storage barrel, the distance between the strip through groove and the liquid leakage hole is used as the distillation standard of preliminary distillation, after the impurities are distilled and discharged in gaseous state during the preliminary distillation process, the liquid leakage hole of the storage barrel rises to correspond with the strip through groove, the epoxy resin in the storage barrel flows out, the preliminary distillation is completed, and there is no lag in observing the completion time of the first distillation, which ensures the purification efficiency.

Description

Technical Field

[0001] This invention belongs to the field of separation and purification technology, and specifically relates to a separation and purification device for epoxy resin curing agents. Background Technology

[0002] Epoxy resin curing agent is a thermosetting plastic with high chemical resistance and strength. It is composed of epoxy resin monomers and curing agents, which react under certain conditions to form a polymer compound. In the industrial production process, the purity of epoxy resin has a crucial impact on the performance of epoxy resin curing agent. Therefore, it is necessary to improve the purity of epoxy resin to obtain high-purity epoxy resin curing agent.

[0003] Existing purification methods mostly involve distillation. This involves heating and stirring the epoxy resin in a distillation vessel to convert the impurities into a gaseous state, which is then condensed and separated to improve the purity of the epoxy resin. In actual purification processes, to further enhance purity, the impurities in the epoxy resin often need to be distilled twice. The first distillation separates most of the impurities, and the second distillation separates the remaining small portion. During the first distillation, the completion of the first distillation is often determined by observing whether condensate of gaseous impurities flows out. However, the condensation of gaseous impurities into a liquid state requires time, which undoubtedly leads to a lag in the observed completion time of the first distillation, affecting purification efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a separation and purification device for epoxy resin curing agents, in order to solve the problems existing in the background art.

[0005] To achieve the above-mentioned technical objectives, the technical solution adopted by the present invention is as follows:

[0006] A separation and purification device for epoxy resin curing agent includes a frame and a distillation tank fixed to the frame. The distillation tank includes a primary distillation chamber and a secondary distillation chamber from top to bottom.

[0007] The primary distillation chamber includes a storage tank, a lifting mechanism, and a heating and stirring mechanism. A bottom platform is installed at the bottom of the storage tank, and there is a gap between the bottom platform and the inner wall of the primary distillation chamber. A weight measuring sensor is built into the bottom platform to measure the weight of the material inside the storage tank. Several evenly arranged leakage holes are opened on the circumference of the storage tank. A first electric switch valve is installed inside each leakage hole. Several through grooves are opened on the bottom platform, each corresponding to the position of the leakage hole. Each through groove is slidably connected to a vertically arranged sliding plate. Each sliding plate is slidably sealed to the outer wall of the storage tank and has a strip-shaped through groove corresponding to the leakage hole. The strip-shaped through groove extends from the middle of the sliding plate to the upper and lower sides. A ring plate is connected to the upper end of each sliding plate. The ring plate is mounted inside the primary distillation chamber.

[0008] The lifting mechanism includes several spring rods fixedly connected to the top of the equipment frame. The telescopic ends of each spring rod face downward and are connected to an annular connecting platform. Several connecting rods are fixedly connected to the bottom of the annular connecting platform. Each connecting rod slides through the primary distillation chamber and is fixedly connected to the top of the storage tank.

[0009] The heating and stirring mechanism is fixedly installed with the equipment frame and extends into the storage tank. The equipment frame is provided with a first distillation pipeline corresponding to the primary distillation chamber. The equipment frame is also provided with a feed pipe extending to the top of the storage tank.

[0010] The heating and stirring mechanism includes a motor, a hollow telescopic rod, and several heating rods. The output shaft of the motor is fixedly connected to the hollow telescopic rod via a flange. All heating rods are installed on the movable end of the hollow telescopic rod. The wires of each heating rod are led out of the hollow telescopic rod to the outside of the primary distillation chamber. An electric slip ring for connecting to electricity is also installed on the fixed end of the hollow telescopic rod. The lower side of the movable end of the hollow telescopic rod is rotatably connected to the middle of the bottom platform.

[0011] When the weight measuring sensor detects that the weight of the material in the storage hopper is 0, each of the first electric switch valves is in the closed state. When the weight measuring sensor detects that the weight of the material in the storage hopper reaches a specified value, each of the first electric switch valves switches from the closed state to the open state.

[0012] The ring plate is movably mounted to the interior of the primary distillation chamber. The ring plate is also provided with a mounting platform, a positioning rod, and an adjusting screw. There are two mounting platforms, which are fixedly mounted on both sides of the ring plate. The positioning rod is fixedly connected to the inner wall of the primary distillation chamber and slides through one of the mounting platforms. The adjusting screw is threadedly connected to the primary distillation chamber and its lower end extends into the interior of the primary distillation chamber and is rotatably connected to the other mounting platform.

[0013] The outer wall of the primary distillation chamber is also equipped with a pointer, the outer wall of the adjusting screw is machined with an indicator line corresponding to the pointer, the top of the adjusting screw is equipped with an operating handle, and the equipment rack is also equipped with a ladder corresponding to the adjusting screw.

[0014] A storage chamber is provided between the primary distillation chamber and the secondary distillation chamber. The upper end of the storage chamber is connected to the primary distillation chamber. An arched bottom plate is machined at the bottom of the storage chamber. The arched bottom plate arches upward from the edge of the storage chamber to the center of the storage chamber. Multiple second electric switching valves are also evenly installed on the edge of the arched bottom plate.

[0015] When the weight measuring sensor detects that the weight of the material in the storage hopper is 0, each of the second electric switch valves is in the open state. When the weight measuring sensor detects that the weight of the material in the storage hopper reaches a specified value, each of the second electric switch valves switches from the open state to the closed state.

[0016] The circumferential wall of the secondary distillation chamber is heated by electric heating, and each of the second electric switching valves faces the inner wall of the secondary distillation chamber. The inner wall of the secondary distillation chamber is also processed with several wavy annular protrusions.

[0017] The top of the arched base plate is connected to a second distillation pipe, which is connected to the secondary distillation chamber and extends outward to be fixed to the equipment frame. A discharge pipe is provided at the bottom of the second distillation pipe.

[0018] In the primary distillation process, this invention utilizes multiple sliding plates to create strip-shaped channels and various drain holes on the lower side of the storage tank. The distance between the strip-shaped channels and the drain holes serves as the distillation standard for the primary distillation. During the primary distillation, after impurities are distilled into gaseous state and discharged, the drain holes in the storage tank will rise to align with the strip-shaped channels, allowing the epoxy resin in the storage tank to flow out, thus completing the primary distillation. This eliminates the lag inherent in manually observing the completion time of the primary distillation, ensuring purification efficiency. Attached Figure Description

[0019] The present invention can be further illustrated by the non-limiting embodiments given in the accompanying drawings.

[0020] Figure 1 This is a schematic diagram of the structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the internal structure of the primary distillation chamber of the present invention;

[0022] Figure 3 for Figure 2 Enlarged schematic diagram of the structure at point A;

[0023] Figure 4 for Figure 2 Enlarged schematic diagram of the structure at point B;

[0024] Figure 5 for Figure 2 Enlarged schematic diagram of the structure at point C;

[0025] Figure 6 This is a schematic diagram of the internal structure of the primary distillation chamber, the storage chamber, and the secondary distillation chamber of the present invention.

[0026] The symbols for the main components are explained below:

[0027] Equipment frame 100, distillation tank 101, first distillation pipeline 102, feed pipe 103, primary distillation chamber 110, storage tank 111, first electric switch valve 1111, bottom platform 112, slide plate 113, strip groove 1131, ring plate 1132, spring rod 114, annular connecting platform 1141, connecting rod 1142, motor 115, hollow telescopic rod 1151, heating rod 1152, electric slip ring 1153, secondary distillation chamber 120;

[0028] Mounting platform 1133, positioning rod 1134, adjusting screw 1135, pointer 1136, indicator line 1137, operating handle 1138, ladder 1139;

[0029] Storage chamber 116, arched bottom plate 1161, second electric switch valve 1162, annular protrusion 1201, second distillation pipeline 1202, and discharge pipe 1203. Detailed Implementation

[0030] To enable those skilled in the art to better understand the present invention, the technical solution of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0031] Example 1, as Figures 1 to 3The device shown is a separation and purification apparatus for epoxy resin curing agent, including an equipment frame 100 and a distillation tank 101 fixedly mounted on the equipment frame 100. The distillation tank 101 includes a primary distillation chamber 110 and a secondary distillation chamber 120 from top to bottom. The equipment frame 100 is used to mount the distillation tank 101. The epoxy resin is initially distilled through the primary distillation chamber 110 on the upper side of the distillation tank 101 to distill most of the impurities. Then, the epoxy resin is distilled a second time through the secondary distillation chamber 120 to obtain purified epoxy resin.

[0032] The primary distillation chamber 110 includes a storage tank 111, a lifting mechanism, and a heating and stirring mechanism. A bottom platform 112 is installed at the bottom of the storage tank 111, and there is a gap between the bottom platform 112 and the inner wall of the primary distillation chamber 110. A weight measuring sensor is built into the bottom platform 112 to measure the weight of the material inside the storage tank 111. Several evenly arranged leakage holes are opened on the circumference of the storage tank 111. A first electric switch valve 1111 is installed inside each leakage hole. Several through grooves are opened on the bottom platform 112, which are respectively corresponding to the positions of the leakage holes. Each through groove is slidably connected to a vertically arranged slide plate 113. Each slide plate 113 is slidably sealed to the outer wall of the storage tank 111 and has a strip-shaped through groove 1131 corresponding to the leakage hole. The strip-shaped through groove 1131 extends from the middle of the slide plate 113 to the upper and lower sides. The upper end of each slide plate 113 is connected to a ring plate 1132, which is mounted inside the primary distillation chamber 110.

[0033] The lifting mechanism includes several spring rods 114 fixedly connected to the top of the equipment frame 100. The telescopic ends of each spring rod 114 face downward and are connected to an annular connecting platform 1141. Several connecting rods 1142 are fixedly connected to the bottom of the annular connecting platform 1141. Each connecting rod 1142 slides through the primary distillation chamber 110 and is fixedly connected to the top of the storage tank 111.

[0034] The heating and stirring mechanism is fixedly installed on the equipment frame 100 and extends into the storage tank 111. The equipment frame 100 is provided with a first distillation pipeline 102 corresponding to the primary distillation chamber 110. The equipment frame 100 is also provided with a feed pipe 103 extending to the top of the storage tank 111.

[0035] The heating and stirring mechanism includes a motor 115, a hollow telescopic rod 1151, and several heating rods 1152. The output shaft of the motor 115 is fixedly connected to the hollow telescopic rod 1151 via a flange. The heating rods 1152 are all installed on the movable end of the hollow telescopic rod 1151. The wires of each heating rod 1152 are led out from the hollow telescopic rod 1151 to the outside of the primary distillation chamber 110. The fixed end of the hollow telescopic rod 1151 is also equipped with an electric slip ring 1153 for connecting to electricity. The lower side of the movable end of the hollow telescopic rod 1151 is rotatably connected to the middle of the bottom platform 112.

[0036] When the weight sensor detects that the weight of the material in the storage bin 111 is 0, each of the first electric switch valves 1111 is in the closed state. When the weight sensor detects that the weight of the material in the storage bin 111 reaches a specified value, each of the first electric switch valves 1111 switches from the closed state to the open state.

[0037] When the storage tank 111 of the device is not filled with epoxy resin that needs to be purified, the spring rod 114 uses elastic force to lift the storage tank 111, the movable end of the hollow telescopic rod 1151 that extends into the storage tank 111, and each heating rod 1152 to the maximum lifting height. This causes the bottom platform 112 of the storage tank 111 to move upward relative to each sliding plate 113 connected to the lower side of the ring plate 1132 mounted inside the storage tank 111. As a result, each drain hole on the lower side of the storage tank 111 corresponds to the strip groove 1131 of each sliding plate 113. The hollow telescopic rod 1151 is at its minimum length. At the same time, since the storage tank 111 is not filled with epoxy resin that needs to be purified, the weight measurement sensor built into the bottom platform 112 of the storage tank 111 detects that the weight of the material in the storage tank 111 is 0, so that the first electric switch valve 1111 in each drain hole is in the closed state.

[0038] During the initial distillation of epoxy resin, the epoxy resin to be purified is injected into the storage tank 111 through the feed pipe 103. The weight sensor built into the bottom platform 112 of the storage tank 111 detects that the weight of the material inside the storage tank 111 is gradually increasing, causing each spring rod 114 to gradually extend until the weight sensor detects that the weight of the material inside the storage tank 111 has reached a specified value. At this point, the feed pipe 103 stops injecting the epoxy resin to be purified. Figures 1 to 3 As shown, the storage tank 111 is at its lowest height, the hollow telescopic rod 1151 is at its maximum extension length, and each leakage hole of the storage tank 111 is located below the strip groove 1131 of each slide plate 113, so that each leakage hole is sealed by the lower side of each slide plate 113 to prevent epoxy resin from leaking out. At the same time, when the weight of the material in the storage tank 111 is detected by the weight metering sensor to reach the specified value, each first electric switch valve 1111 switches from the closed state to the open state, and preliminary distillation can be carried out.

[0039] During the initial distillation, the motor 115 starts, and the output shaft of the motor 115 drives the hollow telescopic rod 1151 to rotate, so that each heating rod 1152 can stir and heat the epoxy resin in the storage tank 111. The electric slip ring 1153 can effectively prevent the wires from getting tangled when the hollow telescopic rod 1151 rotates. Under the heating and stirring of the heating rod 1152, the impurities of the epoxy resin can be initially distilled, changing from liquid to gas, and then discharged to the outside of the primary distillation chamber 110 through the first distillation pipeline 102 for condensation and collection.

[0040] During the initial distillation process, as liquid impurities are converted into gaseous substances and discharged, the weight of the material in the storage tank 111 decreases. As the weight of the material decreases, the spring lever 114 simultaneously pulls the storage tank 111 upwards, causing the various leakage holes on the lower side of the storage tank 111 to gradually move to the strip grooves 1131 of each slide plate 113. Since each of the first electric switch valves 1111 is in the open state, the epoxy resin in the storage tank 111 can flow out through each of the first switch valves 1111 and the strip grooves 1131, and flow down along the gap between the bottom platform 112 and the inner wall of the primary distillation chamber 110, so that the epoxy resin that has undergone initial distillation can enter the secondary distillation chamber 120 for secondary distillation.

[0041] In this embodiment, through the strip-shaped channels 1131 opened by multiple sliding plates 113, and the various drain holes on the lower side of the storage tank 111, the distance between the strip-shaped channels 1131 and the drain holes is used as the distillation standard for the initial distillation. During the initial distillation process, after the impurities are distilled into gaseous state and discharged, the drain holes of the storage tank 111 will rise to correspond to the strip-shaped channels 1131, and the epoxy resin in the storage tank 111 will flow out, and the initial distillation is completed. There is no lag in the completion time of the initial distillation due to human observation, which ensures the purification efficiency.

[0042] Because the weight ratio of impurities varies between different batches of epoxy resin, the following improvements are made in this embodiment to control the degree of initial distillation: Figure 2 , Figure 4 and Figure 5As shown, the ring plate 1132 and the interior of the primary distillation chamber 110 are movably connected. The ring plate 1132 is also provided with a mounting platform 1133, a positioning rod 1134 and an adjusting screw 1135. There are two mounting platforms 1133, which are fixedly installed on both sides of the ring plate 1132 respectively. The positioning rod 1134 is fixedly connected to the inner wall of the primary distillation chamber 110 and slides through one of the mounting platforms 1133. The adjusting screw 1135 is threadedly connected to the primary distillation chamber 110 and its lower end extends into the primary distillation chamber 110 and is rotatably connected to the other mounting platform 1133.

[0043] The outer wall of the primary distillation chamber 110 is also equipped with a pointer 1136, the outer wall of the adjusting screw 1135 is machined with an indicator line 1137 corresponding to the pointer 1136, the top of the adjusting screw 1135 is equipped with an operating handle 1138, and the equipment rack 100 is also equipped with a ladder 1139 corresponding to the adjusting screw 1135.

[0044] Before making adjustments, a sample is taken from the batch currently being distilled to obtain the weight percentage of the impurities.

[0045] During adjustment, based on the known weight and specific gravity of the impurities, the device ascends via ladder 1139 to the position of adjusting screw 1135. Since the mounting platform 1133 on one side of the ring plate 1132 is positioned by positioning rod 1134, and the mounting platform 1133 on the other side is rotatably connected to the lower end of adjusting screw 1135, the operator can rotate the operating handle 1138 to move the adjusting screw 1135 up and down relative to the primary distillation chamber 110. Based on the indications of pointer 1136 and indicator line 1137, the up and down positions of the ring plate 1132 and each slide plate 113 are adjusted, thereby controlling the distance between the strip groove 1131 of each slide plate 113 and each leakage hole of the storage tank 111. This achieves an adjustable degree of preliminary distillation, as detailed below:

[0046] The total weight of the epoxy resin sample is M. After distillation and purification of the sampled epoxy resin, the weight of the resulting epoxy resin becomes m. Therefore, the specific gravity of the epoxy resin is... Therefore, during the initial distillation, based on the linear relationship between the elongation of the spring rod 114 and the elastic force, when the weight sensor detects that the weight of the material in the storage tank 111 reaches a specified value, the elongation of the spring rod 114 is L (a fixed value). After distilling impurities, the elongation of the spring rod 114 should be... Therefore, the distance between the strip groove 1131 of each slide plate 113 and each leakage hole of the storage tank 111 should be adjusted to the difference in the elongation of the spring rod 114, that is... In actual control, the distance between the strip groove 1131 of each adjustable slide plate 113 and each leakage hole of the storage tank 111 is slightly less than Meanwhile, in order to perform the initial distillation more accurately, multiple samples can be taken and the average weight ratio of the epoxy resin from the multiple samples can be calculated, and the adjustment can be made according to the average weight ratio of the epoxy resin from the multiple samples.

[0047]

[0048] in, The weight percentages of epoxy resin samples from multiple samplings are the average, m1, m2, ..., m n The weights of epoxy resin obtained after each sampling distillation purification are M1, M2, ..., M. n These represent the total weight for each sampling.

[0049] Therefore, this embodiment also provides a method for controlling the degree of distillation during the initial distillation using this equipment, the specific steps of which are as follows:

[0050] Step ①: Before distilling the epoxy resin, the batch of epoxy resin is sampled and purified multiple times. The weight ratio of the epoxy resin after each sampling and purification is calculated to obtain the average weight ratio of the batch of epoxy resin.

[0051] Step 2: When distilling epoxy resin, the epoxy resin to be distilled and purified is introduced into the storage tank 111 until the weight of the material in the storage tank 111 reaches the specified value, and the spring rod 114 is at the fixed maximum extension L.

[0052] Step 3: Based on the average weight ratio of the epoxy resin in this batch, the distance between the strip groove 1131 of each slide plate 113 and each leakage hole of the storage tank 111 is obtained. Finally, by rotating the operating handle 1138, the adjusting screw 1135 moves up and down relative to the primary distillation chamber 110. According to the indication of the pointer 1136 and the indicator line 1137, the ring plate 1132 and each slide plate 113 are adjusted to the corresponding position.

[0053] Step 4: As impurities are discharged during the initial distillation, the weight of the material in the storage tank 111 decreases. The spring lever 114 will gradually pull the storage tank 111 upward, so that each leakage hole of the storage tank 111 corresponds to the strip groove 1131 of each slide plate 113. The epoxy resin in the storage tank 111 after the initial distillation will leak out through each of the first electric switch valves 1111 of each leakage hole, thereby completing the initial distillation.

[0054] Example 2 is a further explanation of the secondary distillation chamber based on Example 1, such as... Figure 6As shown, a storage chamber 116 is also provided between the primary distillation chamber 110 and the secondary distillation chamber 120. The upper end of the storage chamber 116 is connected to the primary distillation chamber 110. An arched bottom plate 1161 is machined at the bottom of the storage chamber 116. The arched bottom plate 1161 arches upward from the edge of the storage chamber 116 to the middle of the storage chamber 116. A plurality of second electric switching valves 1162 are also evenly installed on the edge of the arched bottom plate 1161.

[0055] When the weight sensor detects that the weight of the material in the storage bin 111 is 0, each of the second electric switch valves 1162 is in the open state. When the weight sensor detects that the weight of the material in the storage bin 111 reaches the specified value, each of the second electric switch valves 1162 switches from the open state to the closed state.

[0056] The circumferential walls of the secondary distillation chamber 120 are heated by electric heating. Each of the second electric switch valves 1162 faces the inner wall of the secondary distillation chamber 120. The inner wall of the secondary distillation chamber 120 is also machined with several wavy annular protrusions 1201.

[0057] When the storage tank 111 of the device is not filled with epoxy resin that needs to be purified, the weight measurement sensor detects that the weight of the material in the storage tank 111 is 0, so that the first electric switch valve 1111 in each leakage hole is closed, and at the same time, each second electric switch valve 1162 on the edge of the arched bottom plate 1161 is open.

[0058] When the epoxy resin to be purified is injected into the storage tank 111, when the weight of the material in the storage tank 111 reaches the specified value, each of the first electric switch valves 1111 switches from the closed state to the open state. At the same time, each of the second electric switch valves 1162 on the edge of the arched bottom plate 1161 switches from the open state to the closed state.

[0059] Therefore, during the initial distillation process, since the weight of the material in the storage tank 111 reaches the specified vertical position, the second electric switch valve 1162 is in the closed state until the initial distillation is completed. The material inside the storage tank 111 leaks into the storage chamber 116 through the first electric switch valve 1111 in each leakage hole and the strip groove 1131. Thus, under the closure of each second electric switch valve 1162, the epoxy resin of the initial distillation can be temporarily stored in the storage chamber 116. At this time, the inner wall of the secondary distillation chamber 120 can be heated to the required distillation temperature.

[0060] After all the material that has undergone preliminary distillation has flowed out of the storage tank 111, the weight sensor detects that the weight of the material in the storage tank 111 is 0. The first electric valves 1111 in each leakage hole are closed, and the second electric valves 1162 on the edge of the arched bottom plate 1161 are open. Therefore, the feed pipe 103 can reintroduce the epoxy resin to be distilled, while the pre-distilled epoxy resin temporarily stored in the storage chamber 116 will flow out through the second electric valves 1162. In practice, the feed rate of the feed pipe 103 is adjusted to be similar to the discharge rate of the storage chamber 116, so that most of the pre-distilled epoxy resin in the storage chamber 116 is discharged. Furthermore, due to the arched bottom plate 1161... The base plate 1161 arches upward from the edge of the storage chamber 116 towards the center of the storage chamber 116, and each of the second electric switch valves 1162 faces the inner wall of the secondary distillation chamber 120. Therefore, the epoxy resin temporarily stored in the storage chamber 116 and initially distilled can be completely and evenly dispersed through each of the second electric switch valves 1162 and discharged to the inner wall of the secondary distillation chamber 120. The epoxy resin flowing on the wall surface is subjected to secondary distillation by the high temperature of the inner wall of the secondary distillation chamber 120, which further separates and purifies the epoxy resin. In addition, several wavy annular protrusions 1201 are processed on the inner wall of the secondary distillation chamber 120 to increase the contact area of ​​the epoxy resin on the high temperature inner wall of the secondary distillation chamber 120 and ensure the distillation effect.

[0061] The epoxy resin to be purified is introduced into the feed pipe 103 until the weight of the material in the storage tank 111 reaches the specified value. At this time, each of the first electric switch valves 1111 switches from the closed state to the open state, and the first distillation can be carried out. At the same time, each of the second electric switch valves 1162 on the edge of the arched bottom plate 1161 switches from the open state to the closed state, and the inside of the storage chamber 116 is resealed to temporarily store the epoxy resin for the next initial distillation.

[0062] As a further optimization and explanation of this embodiment, such as Figure 6 As shown, the top of the arched base plate 1161 is connected to the second distillation pipe 1202, which is connected to the secondary distillation chamber 120 and extends outward to be fixed to the equipment frame 100. The bottom of the second distillation pipe 1202 is provided with a discharge pipe 1203.

[0063] The gaseous impurities formed during distillation can be discharged to the outside of the secondary distillation chamber 120 for condensation and collection through the second distillation pipeline 1202. The epoxy resin that has undergone secondary distillation and flows down the inner wall of the secondary distillation chamber 120 can be discharged and collected through the bottom discharge pipe 1203.

[0064] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A separation and purification device for epoxy resin curing agents, comprising a frame and a distillation tank fixedly mounted to the frame, characterized in that: The distillation tank, from top to bottom, includes a primary distillation chamber and a secondary distillation chamber; The primary distillation chamber includes a storage tank, a lifting mechanism, and a heating and stirring mechanism. A bottom platform is installed at the bottom of the storage tank, and there is a gap between the bottom platform and the inner wall of the primary distillation chamber. A weight measuring sensor is built into the bottom platform to measure the weight of the material inside the storage tank. Several evenly arranged leakage holes are opened on the circumference of the storage tank. A first electric switch valve is installed inside each leakage hole. Several through grooves are opened on the bottom platform, each corresponding to the position of the leakage hole. Each through groove is slidably connected to a vertically arranged sliding plate. Each sliding plate is slidably sealed to the outer wall of the storage tank and has a strip-shaped through groove corresponding to the leakage hole. The strip-shaped through groove extends from the middle of the sliding plate to the upper and lower sides. A ring plate is connected to the upper end of each sliding plate. The ring plate is mounted inside the primary distillation chamber. The lifting mechanism includes several spring rods fixedly connected to the top of the equipment frame. The telescopic ends of each spring rod face downward and are connected to an annular connecting platform. Several connecting rods are fixedly connected to the bottom of the annular connecting platform. Each connecting rod slides through the primary distillation chamber and is fixedly connected to the top of the storage tank. The heating and stirring mechanism is fixedly installed with the equipment frame and extends into the storage tank. The equipment frame is provided with a first distillation pipeline corresponding to the primary distillation chamber. The equipment frame is also provided with a feed pipe extending to the top of the storage tank.

2. The separation and purification equipment for epoxy resin curing agent according to claim 1, characterized in that: The heating and stirring mechanism includes a motor, a hollow telescopic rod, and several heating rods. The output shaft of the motor is fixedly connected to the hollow telescopic rod via a flange. All heating rods are installed on the movable end of the hollow telescopic rod. The wires of each heating rod are led out of the hollow telescopic rod to the outside of the primary distillation chamber. An electric slip ring for connecting to electricity is also installed on the fixed end of the hollow telescopic rod. The lower side of the movable end of the hollow telescopic rod is rotatably connected to the middle of the bottom platform.

3. The separation and purification equipment for epoxy resin curing agent according to claim 2, characterized in that: When the weight measuring sensor detects that the weight of the material in the storage hopper is 0, each of the first electric switch valves is in the closed state. When the weight measuring sensor detects that the weight of the material in the storage hopper reaches a specified value, each of the first electric switch valves switches from the closed state to the open state.

4. The separation and purification equipment for epoxy resin curing agent according to claim 3, characterized in that: The ring plate is movably mounted to the interior of the primary distillation chamber. The ring plate is also provided with a mounting platform, a positioning rod, and an adjusting screw. There are two mounting platforms, which are fixedly mounted on both sides of the ring plate. The positioning rod is fixedly connected to the inner wall of the primary distillation chamber and slides through one of the mounting platforms. The adjusting screw is threadedly connected to the primary distillation chamber and its lower end extends into the interior of the primary distillation chamber and is rotatably connected to the other mounting platform.

5. The separation and purification equipment for epoxy resin curing agent according to claim 4, characterized in that: The outer wall of the primary distillation chamber is also equipped with a pointer, the outer wall of the adjusting screw is machined with an indicator line corresponding to the pointer, the top of the adjusting screw is equipped with an operating handle, and the equipment rack is also equipped with a ladder corresponding to the adjusting screw.

6. The separation and purification equipment for epoxy resin curing agent according to claim 5, characterized in that: A storage chamber is provided between the primary distillation chamber and the secondary distillation chamber. The upper end of the storage chamber is connected to the primary distillation chamber. An arched bottom plate is machined at the bottom of the storage chamber. The arched bottom plate arches upward from the edge of the storage chamber to the center of the storage chamber. Multiple second electric switching valves are also evenly installed on the edge of the arched bottom plate.

7. The separation and purification equipment for epoxy resin curing agent according to claim 6, characterized in that: When the weight measuring sensor detects that the weight of the material in the storage hopper is 0, each of the second electric switch valves is in the open state. When the weight measuring sensor detects that the weight of the material in the storage hopper reaches a specified value, each of the second electric switch valves switches from the open state to the closed state.

8. The separation and purification equipment for epoxy resin curing agent according to claim 7, characterized in that: The circumferential wall of the secondary distillation chamber is heated by electric heating, and each of the second electric switching valves faces the inner wall of the secondary distillation chamber. The inner wall of the secondary distillation chamber is also processed with several wavy annular protrusions.

9. The separation and purification equipment for epoxy resin curing agent according to claim 8, characterized in that: The top of the arched base plate is connected to a second distillation pipe, which is connected to the secondary distillation chamber and extends outward to be fixed to the equipment frame. A discharge pipe is provided at the bottom of the second distillation pipe.

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