Alcohol compound mixed solvent time domain dynamic evaporation equipment and process

Abstract

The application discloses an alcohol compound mixed solvent time domain dynamic evaporation device and process, and relates to the technical field of alcohol component fractionation and purification. The application is characterized in that an inner liquid cavity is arranged in the alcohol compound mixed distillation device, an appropriate amount of mixed liquid is injected into the bottom layer of the evaporation cavity through a liquid pump, an evaporation fret is arranged at the bottom of the evaporation cavity, the heating degree of the first electric heating change region and the second electric heating change region which are distributed in the evaporation fret is periodically and alternately controlled, the surrounding liquid is evenly heated by the electric heater, the excessive heating degree of the surrounding liquid caused by the real-time heat production of the adjacent electric heater is reduced, the liquid near the evaporation liquid surface is evenly heated, the heating distillation temperature of the alcohol mixture with close boiling points is controlled, and thus the purification efficiency and purity of the distillation component are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of alcohol component fractionation purification, and particularly relates to an alcohol compound mixed solvent time domain dynamic evaporation device and process. BACKGROUND

[0002] When alcohol compounds are mixed together, because most of the alcohol substances can be mutually soluble, generally, a fractionation method is used to purify and separate the alcohol substances. However, the fractionation boiling points of some alcohol mixtures are very close. For example, when ethanol and isopropanol are mixed and separated, isopropanol and ethanol can also be mutually soluble, the boiling point of ethanol is 79 DEG C, and the boiling point of isopropanol is 82 DEG C. When the two are fractionated and purified by conventional heating to the boiling point, the purification effect is often poor.

[0003] The main reason for the low purity of the fractionation and purification by the conventional heating fractionation method in the past is that, in the heating process, the heating of the whole mixed liquid is directly performed by a single whole heater. If the temperature of the heater is relatively high, the proportion of the high-boiling-point component in the fractionation gas flow is increased. For example, the temperature of the whole mixed liquid is heated to 79 DEG C by the heater, although the rapid boiling evaporation of ethanol is ensured, the temperature of the surrounding mixed liquid directly contacting the heater may have been far higher than 79 DEG C, so that the isopropanol in the mixed liquid around the heater also boils and evaporates. The boiling mixed components are separated from the mixed liquid together with other ethanol boiling evaporation gas flow, resulting in poor fractionation purity. If the temperature of the heater is relatively low, for example, the temperature of the heater is controlled at 79 DEG C, it is easy to cause only the liquid temperature around the heater to reach the ethanol boiling point of 79 DEG C, and the temperature of most of the liquid regions does not reach the ethanol boiling point, thereby affecting the fractionation and purification efficiency of ethanol.

[0004] In summary, how to improve the fractionation and purification purity and the fractionation and purification efficiency of the alcohol mixture with close boiling points by heating and evaporation has become a problem to be solved. SUMMARY

[0005] The technical problem to be solved by the present application is to provide an alcohol compound mixed solvent time domain dynamic evaporation device and process, so that the liquid near the evaporation liquid surface is subjected to relatively balanced heating heat distribution, which is beneficial to control the heating distillation temperature of the alcohol mixture with close boiling points of components, thereby improving the purification efficiency and purity of the distillation components.

[0006] To solve the above technical problems, the present application is realized by the following technical scheme:

[0007] The present invention provides a time-domain dynamic evaporation device for a mixed solvent of an alcohol compound. The evaporation device is provided with a circle of side ring bins at the bottom, a ring bin top plate is provided at the top of the inner periphery of the side ring bins, an inner liquid cavity is formed between the side ring bins and the ring bin top plate, the evaporation device is provided with an evaporation cavity located above the side ring bins and the ring bin top plate, and a plurality of liquid pumps for introducing liquid in the inner liquid cavity into the evaporation cavity are arranged at the bottom of the side ring bins.

[0008] An evaporation frame is fixedly installed horizontally at the bottom of the evaporation chamber. The inner periphery of the evaporation frame is provided with a plurality of diagonal strips arranged along the diagonal parallel direction. The diagonal strips are made of metal. Among them, the diagonal strip in the middle position is the longest, and the length of the diagonal strips on both sides gradually decreases. Electric heating elements are evenly arranged on the diagonal strips, and the spacing between adjacent electric heating elements is the same.

[0009] Assume that the positions of the diagonal strips along the diagonal parallel direction are [A1, A2, A3, ..., A n ], where n is an odd number, then [A1, A3, A5, ..., A n ] is the first electrothermal change area, [A2, A4, A6, ..., A n-1 ] is the second electrothermal change area, wherein all the electric heating elements in the first electrothermal change area are connected in series, and all the electric heating elements in the second electrothermal change area are connected in series.

[0010] The electric heating element includes a heating plate, a plug-in screw located below the heating plate, and a lower cone located below the plug-in screw. The top side of the heating plate serves as the heating surface, and the top side of the lower cone is larger than its bottom side. Multiple electric heating rings are embedded in the cone surface of the lower cone, with the heating resistance of the multiple electric heating rings decreasing from top to bottom. The evaporation chamber is equipped with a liquid level sensor for monitoring the evaporation liquid level, which is higher than the top side of the evaporation frame.

[0011] As a preferred technical solution of the time-domain dynamic evaporation equipment of the present invention: the liquid inlet of the liquid pump is connected to the bottom of the inner liquid chamber, the liquid outlet of the liquid pump is provided with a liquid guide tube, the upper end of the liquid guide tube is connected to a one-way valve, wherein the flow direction of the one-way valve points to the evaporation chamber.

[0012] As a preferred technical solution of the time-domain dynamic evaporation equipment of the present invention, the spacing between adjacent diagonal strips is the same, and the outer frame of the evaporation frame is made of plastic material.

[0013] As a preferred technical solution for the time-domain dynamic evaporation device of the present invention, the diagonal strips are provided with mounting portions for mounting the electric heating element, wherein the mounting portions define a disc slot and a rod slot located below the disc slot. The heating disc is mounted in the disc slot, and a plug screw is inserted into the rod slot. The plug screw is longer than the longitudinal depth of the rod slot, and a nut located below the mounting portion is threadedly connected to the plug screw.

[0014] As a preferred technical solution for the time-domain dynamic evaporation device of the present invention, a set of electrical sockets is provided within the disc slot, and a set of electrical connection protrusions are provided on the bottom side of the heating disc, which plug into the electrical sockets. An inner sealing ring and an outer sealing ring are placed within the disc slot, with the electrical sockets located between them. The inner diameter of the inner sealing ring matches the diameter of the rod slot.

[0015] As a preferred technical solution for the time-domain dynamic evaporation device of the present invention, the height difference between the evaporating liquid level in the evaporation chamber and the top side of the heating plate of the electric heater is 10 to 30 mm. A gap of 20 to 50 mm is provided between the bottom side of the lower cone and the top side of the annular silo top plate.

[0016] The present invention adopts a time-domain dynamic evaporation process of a mixed solvent of alcohol compounds, which includes the following contents:

[0017] S1. After the electric heating elements are installed at all installation positions of the evaporation frame, the liquid pump is started, and the mixed liquid in the inner liquid cavity enters the evaporation cavity. The liquid level sensor monitors the liquid level in the evaporation cavity.

[0018] S2. When the liquid level sensor detects that the liquid level reaches the maximum liquid level value preset by the system, the liquid pump stops and the system controls all the electric heating elements in the first electric heating change area and the second electric heating change area to start heating at the same time.

[0019] S3. The system controls the heating current change of the first electrothermal change area to be f(t)=λ|sin t|+I O , the system controls the heating current change of the second electrothermal change area to be f(t)=λ|cost|+I O , where λ is the dynamic heating coefficient, dynamic heating coefficient λ∝ the liquid level height h in the evaporation chamber, t is the heating time, I O is the basic heating current.

[0020] S4. When the liquid level sensor detects that the liquid level drops to the system preset minimum liquid level value, the liquid pump starts until the liquid level sensor detects that the liquid level returns to the system preset maximum liquid level value, at which time the liquid pump stops.

[0021] Compared with the existing technology, the beneficial effects of the present invention are:

[0022] The present invention provides an inner liquid chamber in alcohol compound mixed distillation equipment, injects an appropriate amount of mixed liquid into the bottom layer of the evaporation chamber through a liquid pump, and arranges an evaporation frame at the bottom of the evaporation chamber. By controlling the heating degree of first and second electrothermal change regions that are staggered and distributed in the evaporation frame, the electric heating body can achieve balanced heat regulation of the surrounding liquid, reduce the degree of excessive heat generation of the surrounding liquid by the real-time heat generation of adjacent electric heating bodies, and make the liquid near the evaporation liquid surface receive a more balanced heating heat distribution, which is beneficial to controlling the heating distillation temperature of the alcohol mixture with components having similar boiling points, thereby improving the purification efficiency and purity of the distillation components. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is an overall schematic diagram of the device of the present invention.

[0024] Figure 2 It is a schematic diagram (top view) of the cooperation between the evaporation frame and the electric heating element in the present invention.

[0025] Figure 3 Schematic diagram of two different electrothermal change areas in the present invention.

[0026] Figure 4 It is a schematic structural diagram of the cooperation between the evaporation frame and the electric heating element in the present invention.

[0027] Figure 5 It is a (partial) structural diagram of the cooperation between the evaporation frame and the electric heating element in the present invention.

[0028] Figure 6 It is a structural schematic diagram of the electric heating element in the present invention.

[0029] Figure 7 Schematic diagram of the heating current variation relationship between the first electrothermal variation region and the second electrothermal variation region in the present invention.

[0030] Among them: 1-evaporation equipment, 101-side ring chamber, 102-ring chamber top plate, 103-inner liquid chamber, 104-liquid pump, 1041-liquid inlet, 1042-liquid guide tube, 105-check valve, 106-evaporation chamber, 107-evaporation liquid level; 2-evaporation frame, 201-diagonal strips, 202-mounting part, 203-disc slot, 204-rod slot, 205-electric slot, 206-fixing frame; 3-electric heating element, 301-heating disk, 302-plug screw, 303-lower cone, 304-electric heating ring, 305-electric connecting protrusion, 306-inner sealing ring, 307-outer sealing ring; 4-nut plate; 5-liquid level sensor; Q-electrical heating diffusion area. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below with reference to the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0032] Embodiment one, the present application relates to a kind of alcohol compound mixed solvent time domain dynamic evaporation equipment, its main structural features are as follows:

[0033] Please refer to Figure 1 , side ring storehouse 101 surrounds in the bottom of evaporation equipment 1, ring storehouse top plate 102 is located in the inner wall top position of side ring storehouse 101, and is equipped with, form inner liquid cavity 103 between side ring storehouse 101, ring storehouse top plate 102, evaporation cavity 106 is arranged in the inside of evaporation equipment 1, evaporation cavity 106 is located above side ring storehouse 101, ring storehouse top plate 102. Liquid pump 104 is installed in the bottom of side ring storehouse 101, and liquid pump 104 has multiple, and liquid pump 104 guides liquid in inner liquid cavity 103 into evaporation cavity 106. The inlet 1041 of liquid pump 104 is connected with the bottom of inner liquid cavity 103, and the outlet of liquid pump 104 is configured with liquid guide pipe 1042, and the liquid guide pipe 1042 is vertically arranged, and one-way valve 105 is installed on the upper side end of liquid guide pipe 1042, and the flow direction of one-way valve 105 points to evaporation cavity 106.

[0034] Evaporation rabbet 2 is horizontally installed in the bottom area of evaporation cavity 106, and fixed frame 206 is arranged around evaporation rabbet 2. Liquid level sensor 5 is built in evaporation cavity 106, and liquid level sensor 5 is used to sense and monitor the position of evaporation liquid level 107, and evaporation liquid level 107 is higher than the top side of evaporation rabbet 2, and evaporation liquid level 107 is higher than the top side of heating disc 301 of electric heater 3 by 10-30 mm. There is a gap between the bottom side end of lower conical table 303 and the top side of ring storehouse top plate 102, and the size of the gap is 20-50 mm.

[0035] Please refer to Figure 2 , Figure 3 , Figure 4 , evaporation rabbet 2 is surrounded by a plurality of diagonal strip plates 201 arranged in diagonal parallel direction, and the diagonal strip plates 201 are made of metal material, for example, copper alloy, and the diagonal strip plates 201 can absorb excessive heat released by electric heater, as a temporary heat storage part, when the heat released by electric heater 3 periodically and in real time is reduced, the metal material of diagonal strip plate 201 carries out timely heat "gain", maintains the evaporation temperature of surrounding liquid, and avoids excessive fluctuation of liquid temperature. The length of the diagonal strip plate 201 in the middle position is the longest, and the length of the diagonal strip plate 201 on both sides gradually decreases, which can be understood as follows: according to the distance from the diagonal strip plate 201 in the middle position, the farther the distance, the shorter the length of the diagonal strip plate 201. The electric heater 3 is uniformly arranged on the diagonal strip plate 201, and the spacing between adjacent electric heaters 3 is the same, for example Figure 2 , Figure 3、 Figure 4 In the embodiment, the electric heating elements 3 are evenly distributed on the diagonal strips 201, and the spacing between adjacent electric heating elements 3 is the same. From a diagonal perspective, the electric heating elements 3 on adjacent diagonal strips 201 are staggered. The electric heating elements 3 on the same diagonal strip 201 are spaced farther apart, resulting in less cross-heat interference. The electric heating elements 301 closest to the adjacent diagonal strips 201 are closer, resulting in greater cross-heat interference.

[0036] The spacing between adjacent diagonal strips 201 is the same, and the outer frame of the evaporation frame 2 is made of plastic material. The evaporation frame 2 made of plastic material has good thermal insulation, which reduces the heat diffusion of the diagonal strips 201 inside the evaporation frame 2 to the outside through the solid structure.

[0037] Assume that the positions of the diagonal strips 201 arranged along the diagonal parallel direction are [A1, A2, A3, ..., A n ], where n is an odd number, then [A1, A3, A5, ..., A n ] is the first electrothermal change area, [A2, A4, A6, ..., A n-1 ] is the second electrothermal change area, all the electric heating elements 3 in the first electrothermal change area are connected in series, and all the electric heating elements 3 in the second electrothermal change area are connected in series. When each electric heating element 3 is heated, it will form an electrothermal diffusion area Q with a greater degree of its own heat influence. If all the electric heating elements 3 maintain a constant heating degree, adjacent electric heating elements 3 will produce thermal crosses. The greater the heating degree, the larger the thermal cross area. In fact, it can be understood that if the same area is heated by multiple electric heating elements 3 at the same time, the temperature may "exceed the standard". Therefore, the heating degrees of the electric heating elements 3 at different positions need to be coordinated and regulated.

[0038] See also Figure 1 、 Figure 6The electric heating body 3 includes a heating plate 301 and a plug-in screw 302. The plug-in screw 302 is located on the lower side of the heating plate 301. A thread is set on the ring side of the plug-in screw 302. The lower cone 303 is located on the lower side of the plug-in screw 302. The top side of the heating plate 301 is the heating surface. The top side area of ​​the lower cone 303 is larger than the bottom side area, that is, the upper part is larger and the lower part is smaller. A plurality of electric heating rings 304 are embedded in the cone ring surface of the lower cone 303. The heating resistance of the plurality of electric heating rings 304 decreases from top to bottom. The lower it is, the lower the heating degree is, and the higher it is. The higher the heating degree is, the closer it is to the heating plate 301, and the heating plate 301 needs to heat the area near the evaporation liquid surface. The heating degree of the electric heating ring 304 at the upper side is close to the distillation temperature. It is a kind of "isolation" protection for the evaporation liquid surface to reach the distillation boiling point, reducing the excessive heat transfer downward during the heating process of the evaporation liquid surface 107 area, and ensuring that the heating plate 301 outputs a heating degree that just reaches the distillation boiling point of the required purified component, and can effectively heat and distill the mixed liquid near the evaporation liquid surface.

[0039] See also Figure 4 、 Figure 5 、 Figure 6 The diagonal strip 201 is provided with a mounting portion 202, and the electric heating element 3 is mounted on the mounting portion 202. The mounting portion 202 is provided with: a disc slot 203, a rod slot 204 located at the lower side of the disc slot 203, and a group of electrical slots 205, and the electrical slots 205 are located in the disc slot 203.

[0040] The heating plate 301 is installed in the plate groove 203, and the plug screw 302 is inserted in the rod groove 204. The length of the plug screw 302 is greater than the longitudinal depth of the rod groove 204, and the nut piece 4 is screwed on the plug screw 302 and the nut piece 4 is located on the lower side of the mounting portion 202.

[0041] Two electrical connection protrusions 305 are provided on the bottom side of the heating plate 301 . The two electrical connection protrusions 305 are plugged into the electrical slots 205 to form a series circuit of the electrical connection protrusions 305 , the electrical slots 205 , the heating plate 301 and the electric heating ring 306 .

[0042] An inner sealing ring 306 and an outer sealing ring 307 are placed in the disk slot 203, and the electrical slot 205 is located between the inner sealing ring 306 and the outer sealing ring 307. After the electrical connection protrusion 305 is inserted into the electrical slot 205, the inner sealing ring 306 and the outer sealing ring 307 seal the connection structure between the electrical connection protrusion 305 and the electrical slot 205 from the inner and outer peripheries.

[0043] Example 2: The present invention relates to a time-domain dynamic evaporation process of a mixed solvent of alcohol compounds, comprising the following steps:

[0044] First, after the electric heating element 3 is installed at all the mounting parts 202 of the evaporation frame 2, the liquid pump 104 is started, and the liquid pumps 104 in multiple directions are started and stopped synchronously. The mixed liquid in the inner liquid cavity 103 enters the evaporation cavity 106, and the liquid level sensor 5 senses and monitors the liquid level in the evaporation cavity 106. A large amount of mixed liquid is stored in the inner liquid cavity 103, and only a small amount of mixed liquid in the evaporation cavity 106 is heated, thereby reducing the heat absorption effect of a large amount of liquid on the liquid in the upper evaporation area being heated, so that the "large" area of ​​liquid can be boiled and distilled as soon as it reaches the boiling point, thereby improving heat utilization.

[0045] Then, when the liquid level sensor 5 detects that the liquid level reaches the maximum liquid level value preset by the system, the liquid pump 104 stops, and the system controls all the electric heating bodies 3 in the first and second electric heating change areas to start heating at the same time.

[0046] When the control system is controlling the heating current: Figure 7 , the system controls the heating current change of the first electrothermal change area to be f(t)=λ|sint|+I O , the system controls the heating current change of the second electrothermal change area to be f(t)=λ|cost|+I O , where λ is the dynamic heating coefficient, and the dynamic heating coefficient λ is equal to the liquid level height h in the evaporation chamber. That is, the higher the liquid level in the evaporation chamber 106, the larger the dynamic heating coefficient λ. (In addition, if the temperature of the liquid just introduced from the inner liquid chamber into the evaporation chamber has a significant impact on the heating and distillation process, the dynamic heating coefficient λ also needs to consider factors such as the difference between the temperature of the "new liquid" and the boiling point. Generally, the larger the temperature difference, the larger the dynamic heating coefficient λ.) t is the heating time, I O As the basic heating current. When the electric heating elements 3 in two adjacent electric heating change areas are heated, the electric heating element 3 in one of the electric heating change areas is performing high heat release, while the electric heating element 3 in the other electric heating change area is performing low heat release. Of course, no matter whether the electric heating element 3 is performing low heat release or high heat release, the temperature change in the liquid range very close to the electric heating element 3 will not be too large. The real-time thermal impact of the electric heating element 3 with low heat release on the liquid at a distance is reduced, while the real-time thermal impact of the electric heating element 3 with high heat release on the liquid at a distance is enhanced.

[0047] In addition, when the liquid level sensor 5 detects that the liquid level has dropped to the lowest liquid level value preset by the system, the liquid pump 104 is started, and the liquid pump 104 slowly injects the mixed liquid into the bottom of the evaporation chamber 106. In addition, the "intervention" of the electric heating ring 304 with the lower cone 303 greatly reduces the boiling distillation interference of the evaporation liquid surface 107. Until the liquid level sensor 5 detects that the liquid level has returned to the highest liquid level value preset by the system, the liquid pump 104 is shut down.

[0048] When the present application carries out heating distillation, the electric heating body 3 is heated by a certain voltage and current, the surface temperature of the electric heating body 3 reaches 80℃, the temperature of the liquid area slightly far from the electric heating body 3 may be 79.5℃, but when the electric heating body 3 continuously maintains the heating degree of the current voltage and current, the temperature of the surface of the electric heating body 3 may quickly rise to 81℃, 82℃... Through the periodic electric heating degree control, the surface temperature of the electric heating body 3 is maintained in the region of 79-81℃ and linearly changes, the temperature of the liquid area far from the electric heating body 3 is reduced along with the reduction of the electric heating degree of the electric heating body 3, but the electric heating degree of the adjacent electric heating body 3 is continuously rising, the thermal influence on the liquid area with temperature reduction quickly increases, so that the temperature of the surface and the surrounding liquid of the electric heating body 3 can be maintained in a relatively stable state, and the heating distillation efficiency and the purification degree are improved.

[0049] The above merely describes the preferred embodiments of the present application, and is not intended to limit the present application, and any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A time-domain dynamic evaporation device for a mixed solvent of alcohol compounds, characterized by: The evaporation device (1) is provided with a circle of side ring bins (101) at the bottom, a ring bin top plate (102) is provided at the top of the inner periphery of the side ring bin (101), an inner liquid cavity (103) is formed between the side ring bin (101) and the ring bin top plate (102), the evaporation device (1) is provided with an evaporation cavity (106) located above the side ring bin (101) and the ring bin top plate (102), and a plurality of liquid pumps (104) for introducing liquid in the inner liquid cavity (103) into the evaporation cavity (106) are arranged at the bottom of the side ring bin (101); An evaporation frame (2) is fixedly installed horizontally at the bottom of the evaporation chamber (106), and a plurality of diagonal strips (201) arranged along a diagonal parallel direction are provided inside the evaporation frame (2), wherein the diagonal strips (201) are made of metal, wherein the diagonal strips (201) at the middle position are the longest, and the lengths of the diagonal strips (201) on both sides gradually decrease, and electric heating bodies (3) are evenly arranged on the diagonal strips (201), and the spacing between adjacent electric heating bodies (3) is the same; Assume that the positions of the diagonal strips (201) arranged in the direction parallel to the diagonal line are [A1, A2, A3, ..., A n ], where n is an odd number, then [A1, A3, A5, ..., A n ] is the first electrothermal change area, [A2, A4, A6, ..., A n-1 ] is the second electrothermal change area; wherein all the electric heating elements (3) in the first electrothermal change region are connected in series, and all the electric heating elements (3) in the second electrothermal change region are connected in series; The electric heating element (3) comprises a heating disk (301), a plug-in screw (302) located on the lower side of the heating disk (301), and a lower frustum (303) located on the lower side of the plug-in screw (302), wherein the top side of the heating disk (301) is a heating surface, the top side area of ​​the lower frustum (303) is larger than the bottom side area, and a plurality of electric heating rings (304) are embedded in the conical ring surface of the lower frustum (303), and the heating resistance values ​​of the plurality of electric heating rings (304) decrease from top to bottom; The evaporation chamber (106) is equipped with a liquid level sensor (5) for sensing and monitoring the position of the evaporation liquid level (107), and the evaporation liquid level (107) is higher than the top side of the evaporation frame (2).

2. The time-domain dynamic evaporation device for a mixed solvent of alcohol compounds according to claim 1, characterized in that: The liquid inlet (1041) of the liquid pump (104) is connected to the bottom of the inner liquid chamber (103), and the liquid outlet of the liquid pump (104) is provided with a liquid guide tube (1042). The upper end of the liquid guide tube (1042) is connected to a one-way valve (105), wherein the flow direction of the one-way valve (105) points to the evaporation chamber (106).

3. The time-domain dynamic evaporation device for a mixed solvent of alcohol compounds according to claim 1, characterized in that: The spacing between adjacent diagonal strips (201) is the same, and the outer frame of the evaporation frame (2) is made of plastic material.

4. The time-domain dynamic evaporation device for a mixed solvent of alcohol compounds according to claim 1, characterized in that: The diagonal strip (201) is provided with a mounting portion (202) for mounting the electric heating element (3), wherein the mounting portion (202) is provided with a disc groove (203) and a rod groove (204) located below the disc groove (203); The heating plate (301) is installed at the plate slot (203), and the plug-in screw (302) is inserted at the rod slot (204); The length of the plug-in screw (302) is greater than the longitudinal depth of the rod groove (204), and the plug-in screw (302) is threadedly connected to a nut plate (4) located at the lower side of the mounting portion (202).

5. The time-domain dynamic evaporation device for a mixed solvent of alcohol compounds according to claim 4, characterized in that: A group of electrical slots (205) are provided in the disc slot (203), and a group of electrical connection protrusions (305) are provided on the bottom side of the heating disc (301), and the electrical connection protrusions (305) are plugged into the electrical slots (205); An inner sealing ring (306) and an outer sealing ring (307) are placed in the disc slot (203), and the electrical slot (205) is located between the inner sealing ring (306) and the outer sealing ring (307). The inner diameter of the inner sealing ring (306) matches the diameter of the rod slot (204).

6. The time-domain dynamic evaporation device for a mixed solvent of alcohol compounds according to claim 1, characterized in that: The height difference between the evaporation liquid surface (107) in the evaporation chamber (106) and the top side surface of the heating plate of the electric heating element (3) is 10 to 30 mm; There is a gap between the bottom side end of the lower cone (303) and the top side surface of the ring silo top plate (102), and the gap size is 20 to 50 mm.

7. A time-domain dynamic evaporation process for a mixed solvent of alcohol compounds, characterized in that: The time-domain dynamic evaporation device for a mixed solvent of an alcohol compound according to any one of claims 1 to 6 comprises the following steps: S1. After the electric heating element (3) is installed at all the mounting portions (202) of the evaporation frame (2), the liquid pump (104) is started, and the mixed liquid in the inner liquid chamber (103) enters the evaporation chamber (106). The liquid level sensor (5) senses and monitors the liquid level in the evaporation chamber (106); S2. When the liquid level sensor (5) detects that the liquid level reaches the maximum liquid level value preset by the system, the liquid pump (104) stops, and the system controls all the electric heating elements (3) in the first and second electric heating change areas to start heating at the same time; S3. The system controls the heating current change of the first electrothermal change area to be f(t)=λ|sin t|+I O , the system controls the heating current change of the second electrothermal change area to be f(t)=λ|cos t|+I O , where λ is the dynamic heating coefficient, dynamic heating coefficient λ∝ the liquid level height h in the evaporation chamber, t is the heating time, I O is the basic heating current; S4. When the liquid level sensor (5) detects that the liquid level has dropped to the lowest liquid level value preset by the system, the liquid pump (104) starts, and when the liquid level sensor (5) detects that the liquid level has returned to the highest liquid level value preset by the system, the liquid pump (104) stops.

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