A distillation and dehydration apparatus and method for the preparation of trimethyl borate

Abstract

This invention relates to the field of trimethyl borate processing technology, specifically to a distillation and dehydration apparatus and method for the preparation of trimethyl borate. The dehydration apparatus includes a support plate, a distillation tank, and a dehydration chamber. A gas guide box connects the distillation tank and the dehydration chamber, and a condensing plate is installed on the inner wall of the gas guide box. Inside the dehydration chamber, there is a collection chamber and a dehydration chamber connected to the original liquid chamber. During the liquid storage stage, a pushing mechanism is installed inside the dehydration chamber, and a reciprocating mechanism is installed below the pushing mechanism. The static pressure from the increased liquid level in the original liquid chamber drives the pushing plate downwards. The downward movement of the pushing plate forces the two peeling plates to separate relative to each other. The peeling plates then peel off the upper layer of solution and transfer it to the collection chamber, achieving initial peeling. Simultaneously, the support plate presses air into the air cushion and forces the air cushion to expand, raising the liquid level of the upper layer of solution in the dehydration chamber and placing it on the peeling path of the peeling plates, thereby improving the peeling effect of the upper layer of solution and reducing waste.

Description

Technical Field

[0001] This invention relates to the field of trimethyl borate processing technology, and more specifically, to a distillation and dehydration apparatus and method for the preparation of trimethyl borate. Background Technology

[0002] Trimethyl borate is produced by the reaction of boric acid and methanol. It can be used as a solvent, a fire retardant for plastics, paints, and spray paints, and a fumigant for citrus fruits.

[0003] Chinese Patent Publication No. CN212119098U discloses a dehydration device for the production of trimethyl borate, comprising a cylinder, with support columns fixedly connected to the four lower corners of the cylinder, and anti-slip pads fixedly connected to the lower ends of the support columns. A stirring chamber is located inside the cylinder, and a fixed frame is fixedly connected to the upper side of the cylinder. A motor is fixedly mounted on the fixed frame, and the output end of the motor passes through the cylinder and is fixedly connected to a rotating rod. Several stirring rods are fixedly connected to the outer wall of the rotating rod. A discharge pipe is located on one side of the motor and is fixedly connected to the upper side of the cylinder. This dehydration device for the production of trimethyl borate uses a water pump to draw liquid from the lower end of the stirring chamber into a liquid extraction pipe, which is then sprayed by several nozzles on a spray head. Several connecting pipes are provided to allow the dehydrating agent to more effectively remove water from the trimethyl borate.

[0004] Secondly, existing trimethyl borate dehydration processes also utilize the difference in solubility between trimethyl borate and water in a certain extractant to achieve separation. By selecting a suitable extractant, trimethyl borate is preferentially dissolved, while water remains in the original phase, thus achieving the separation objective.

[0005] To prevent the scraper from penetrating the lower layer of water, it is usually kept at a distance from the water surface. This avoids the upper layer of solution being stripped from containing a large amount of water. At the same time, during the stripping process, a layer of upper layer solution will remain on the water surface. As a result, each stripping operation will cause some of the upper layer solution to be discharged with the water and cannot be effectively collected, resulting in a waste of resources. Summary of the Invention

[0006] This invention provides a distillation and dehydration apparatus for the preparation of trimethyl borate. It utilizes the static pressure from the increased liquid level in the raw material tank as a driving force to move a pusher plate downwards. This downward movement forces the two stripping plates on either side to separate relative to each other. The stripping plates then peel off the upper layer of solution and transfer it to a collection tank, thereby solving the problems mentioned in the background art.

[0007] To achieve the above objectives, the distillation and dehydration apparatus for the preparation of trimethyl borate includes a support plate, a distillation tank, and a dehydration tank. A gas guide box is connected between the distillation tank and the dehydration tank. A condenser plate is provided on the inner wall of the gas guide box, and the end of the gas guide box extends into the original liquid chamber formed inside the dehydration tank.

[0008] The dehydration tank also includes a liquid collection chamber and a dehydration chamber connected to the original liquid chamber. The liquid collection chamber is used to collect the upper liquid from the dehydration chamber.

[0009] During the liquid storage stage, a pushing mechanism is installed inside the dehydration chamber. Below the pushing mechanism is a reciprocating mechanism, which includes a peeling plate that moves laterally inside the dehydration chamber directly below the pushing mechanism and a carrying plate that moves longitudinally inside the liquid collection chamber. The carrying plate is connected to an air cushion installed at the bottom of the dehydration chamber. During the peeling stage, the pushing mechanism uses buoyancy to drive the peeling plates on both sides to move relative to each other. The peeling plates are responsible for peeling off the upper layer of solution and transferring it to the liquid collection chamber according to a preset trajectory. During the peeling stage, the upper layer of solution puts pressure on the carrying plate, forcing the air cushion to expand, so that the liquid level of the upper layer of solution rises and appears on the peeling path of the peeling plate.

[0010] The pushing mechanism includes a pushing plate located inside the dehydration chamber. The bottom of the pushing plate is conical and is used to drive the two peeling plates on both sides to move relative to each other along the inclined surface of the pushing plate. A guide block is fixedly installed on the peeling plate corresponding to the bottom of the pushing plate. The guide blocks on both sides are inclined outward to form an angle to receive the bottom of the pushing plate.

[0011] The stripping plate is L-shaped, with its vertical end penetrating the side plate of the dehydration chamber and a tension spring elastically connecting the vertical end to the side plate. The other end extends downward into the upper solution to strip the upper solution from the dehydration chamber.

[0012] A float is installed inside the raw liquid tank. One end of a rocker arm is rotatably mounted on the top of the float, and the other end of the rocker arm abuts against a vertical pole. The rocker arm rests on a side plate and is rotatably connected to the side plate.

[0013] The specific dehydration process is as follows: The downward movement of the support plate forces an increase in pressure within the collection chamber below it. As the upper layer of solution in the dehydration chamber is gradually peeled off, the weight of the liquid in the dehydration chamber decreases, and the pressure of the liquid on the air cushion weakens. The expansion of the air cushion raises the liquid level in the dehydration chamber. Thus, the upper layer of liquid that was not previously touched by the peeling plate rises and is placed on the lateral path of the peeling plate, thereby being peeled off by the peeling plate, improving the peeling effect on the upper layer of solution and reducing the water content of the solution.

[0014] The second objective of this invention is to provide a dehydration method for a distillation dehydration apparatus used in the preparation of trimethyl borate, comprising the following steps:

[0015] S1. When the mixture in the original liquid tank is injected into the dehydration tank, the extractant is injected into the dehydration tank and allowed to react and stand for a period of time, so that the mixture can be separated into layers, that is, the upper layer is trimethyl borate and the lower layer is water.

[0016] S2. The static pressure caused by the rise in the liquid level in the original liquid tank is used as a driving force to move the pusher plate downward. The downward movement of the pusher plate forces the two peeling plates to move relative to each other and separate. The peeling plates peel off the upper layer of solution and transfer it to the collection tank, thus achieving the initial peeling.

[0017] S3. The support plate presses air into the air cushion and forces the air cushion to expand, causing the liquid level of the upper solution in the dehydration chamber to rise and appear on the peeling path of the peeling plate, so as to achieve the peeling of the upper solution.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] During the liquid storage stage, the static pressure from the increased liquid level in the raw liquid tank is used as the driving force to move the pusher plate downward. The downward movement of the pusher plate forces the two peeling plates on both sides to separate relative to each other. The peeling plates then peel off the upper layer of solution and transfer it to the collection tank, achieving initial peeling. At the same time, the support plate presses air into the air cushion and forces the air cushion to expand, causing the liquid level of the upper layer of solution in the dehydration tank to rise and appear on the peeling path of the peeling plate, thereby improving the peeling effect of the upper layer of solution and reducing waste. Attached Figure Description

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

[0021] Figure 2 This is a front view of the internal structure of the dehydration tank of the present invention (cut section).

[0022] Figure 3 This is an exploded view of the movable plate and the peeling plate of the present invention;

[0023] Figure 4 This is a schematic diagram illustrating the relative motion principle of the two peeling plates of the present invention.

[0024] Figure 5 This is a right view of the connection structure between the peeling plate, the stop plate, and the side plate of the present invention.

[0025] Figure 6 For the present invention Figure 4 Enlarged structural diagram at point A in the diagram;

[0026] Figure 7 This is a schematic diagram illustrating the principle of the original liquid chamber supplying the mixed liquid into the dehydration chamber according to the present invention.

[0027] The meanings of the labels in the diagram are as follows:

[0028] 100. Support plate; 101. Distillation tank; 102. Gas guide box; 103. Condensing plate; 104. Drain pipe; 105. Liquid drain pipe;

[0029] 110. Dehydration tank; 111. Raw liquid tank; 111a. Water guide pipe; 112. Dehydration chamber; 112a. Injection channel; 112b. Drainage chamber; 113. Collection tank;

[0030] 120. Pushing mechanism; 121. Pushing plate; 122. Movable plate; 123. Tilter; 124. Float;

[0031] 130. Stripping plate; 130a. Guide block; 130b. Tension spring; 131. Bearing plate; 132. Stop plate;

[0032] 140. Air cushion; 141. Liquid guide plate; 142. Compression spring. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] To prevent the scraper from penetrating the lower water layer, it is usually kept at a distance from the water surface. This avoids the upper solution being stripped containing a large amount of water. However, during stripping, a layer of upper solution remains on the water surface. Consequently, each stripping operation causes some of this upper solution to be discharged with the water, making it impossible to collect effectively and resulting in resource waste. This invention provides a distillation and dehydration apparatus for the preparation of trimethyl borate. See [link to apparatus]. Figures 1-3 As shown, it includes a support plate 100, a distillation tank 101, and a dehydration tank 110. A gas guide box 102 is connected between the distillation tank 101 and the dehydration tank 110. A condenser plate 103 is provided on the inner wall of the gas guide box 102. The end of the gas guide box 102 extends into the original liquid chamber 111 formed inside the dehydration tank 110, so that the gas evaporated in the distillation tank 101 is condensed by the condenser plate 103 and the condensed liquid is collected for later use.

[0035] Inside the dehydration tank 110, there is also a collection chamber 113 and a dehydration chamber 112 connected to the original liquid chamber 111. When the mixed liquid in the original liquid chamber 111 is injected into the dehydration chamber 112, it is discharged through the injection port (see reference). Figure 2 As shown, the extractant is injected into the dehydration chamber 112, and after a period of reaction and settling, the mixture is allowed to separate into layers, with the upper layer being trimethyl borate and the lower layer being water (as shown). Figure 2 As shown), the liquid collection chamber 113 is used to collect the upper liquid from the dehydration chamber 112. The specific dehydration process is shown below:

[0036] First, after the mixture in the dehydration chamber 112 has achieved stratification, the original liquid chamber 111 is in the liquid storage stage, which continues. During this process, a pushing mechanism 120 is installed inside the dehydration chamber 112, and a reciprocating mechanism is equipped below the pushing mechanism 120. The reciprocating mechanism includes a stripping plate 130 that moves laterally inside the dehydration chamber 112 directly below the pushing mechanism 120, and a support plate 131 that moves longitudinally inside the collection chamber 113. The support plate 131 is connected to an air cushion 140 installed at the bottom of the dehydration chamber 112. During the upper solution stripping stage, the pushing mechanism 120 uses buoyancy to drive the stripping plates 130 on both sides to move relative to each other. Based on the above diagram and combined with... Figure 4 As shown, the stripping plate 130 is responsible for stripping the upper solution according to the preset trajectory and transferring it into the collection tank 113. During the stripping stage, the upper solution applies pressure to the support plate 131, forcing the air cushion 140 to expand, so as to raise the liquid level of the upper solution and appear on the stripping path of the stripping plate 130, thereby improving the stripping effect of the upper solution and reducing waste.

[0037] When the raw liquid tank 111 is in the liquid storage stage, the pushing mechanism 120 includes a pushing plate 121 located in the dehydration tank 112. The bottom of the pushing plate 121 is conical and is used to drive the two side peeling plates 130 to move relative to each other against the inclined surface of the pushing plate 121. A guide block 130a is fixedly provided on the peeling plate 130 corresponding to the bottom of the pushing plate 121. The two side guide blocks 130a are inclined outward to form an angle to receive the bottom of the pushing plate 121. The purpose of this is that when the pushing plate 121 moves downward, the inclined surface of the pushing plate 121 guides the guide block 130a. When pressure is applied at 30a, the guide block 130a introduces the inclined surface of the push plate 121 into the tilt angle. As the push plate 121 is pressed down, the two peeling plates 130 on both sides move laterally and separate from each other. In this process, since the peeling plate 130 is "L" shaped, its vertical end penetrates the side plate of the dehydration chamber 112, and a tension spring 130b is elastically connected between the vertical end and the side plate. When the peeling plate 130 moves laterally, it needs to overcome the elastic potential energy of the tension spring 130b, while the other end extends downward into the upper solution to peel the upper solution from the dehydration chamber 112.

[0038] Secondly, the power source for the push plate 121 comes from: a float plate 124 installed inside the raw liquid tank 111, with one end of a rocker arm 123 rotatably mounted on the top of the float plate 124. The other end of the rocker arm 123 abuts against a vertical rod, and the rocker arm 123 rests on a side plate and is rotatably connected to the side plate, thus forming a lever. When the raw liquid tank 111 is in the liquid storage stage, the liquid level in the raw liquid tank 111 rises, driving the float plate 124 to float upwards, and the rocker arm 123 exhibits a state where one end is raised and the other end is lowered (see reference). Figure 4As shown in the figure, since a movable plate 122 is fixed between the bottom of the upright and the push plate 121, and the movable plate 122 is movably set in the dehydration chamber 112, the sinking end applies pressure to the upright, driving the push plate 121 to move downward and separate the two peeling plates 130, thereby realizing the peeling of the upper solution.

[0039] In other words, during the liquid storage stage, the static pressure from the increased liquid level in the original liquid tank 111 is used as the driving force to move the pusher plate 121 downward. The downward movement of the pusher plate 121 forces the two peeling plates 130 to move relative to each other and separate. The peeling plates 130 then peel off the upper layer of solution and transfer it to the collection tank 113, achieving initial peeling. At the same time, the support plate 131 presses air into the air cushion 140 and forces the air cushion 140 to expand, causing the liquid level of the upper layer of solution in the dehydration tank 112 to rise and appear on the peeling path of the peeling plate 130, thereby improving the peeling effect of the upper layer of solution and reducing waste.

[0040] Return to Figure 4 and combined Figure 6 As shown, a liquid guide plate 141 is attached to the inner side of the side plate to intercept the upper layer solution. A compression spring 142 supporting the bearing plate 131 is elastically connected between the bottom of the liquid guide plate 141 and the side plate. The top of the liquid guide plate 141 has a stop plate 132 fixed to the peeling plate 130. The end of the stop plate 132 is rounded to allow the liquid guide plate 141 to slide smoothly onto the stop plate 132. It should be noted that: Reference Figure 5 As shown, the wide end of the stop plate 132 is smaller than that of the peeling plate 130, and a channel for the stop plate 132 to slide is reserved on the side plate. In this way, in the initial state, the peeling plates 130 on both sides are in a closed state, while the stop plate 132 is separated from the channel, and the two ends of the peeling plate 130 rest on the side plate to provide support for the stop plate 132.

[0041] Secondly, because trimethyl borate has a certain degree of volatility, it will gradually evaporate into the air if it is not kept sealed during the reaction process, resulting in a reduction in the amount of raw materials. The peeling plate 130 remains in contact in the initial state, forming a seal to restrict the trimethyl borate and reduce evaporation.

[0042] On the other hand, the liquid guide plate 141 has several guide grooves, and the side plate has a drain groove of the same size as the guide grooves. In the initial stage, the guide grooves and the drain grooves are offset from each other. In the peeling stage, the guide grooves and the drain grooves are aligned. Specifically, during operation:

[0043] Initially, the baffle 132 separates from the top of the liquid guide plate 141. As the peeling plate 130 expands outward, the liquid guide plate 141 gradually slides onto the baffle 132. During this process, a drainage cavity 112b is formed between the peeling plate 130 and the side plate. The drainage cavity 112b is used to accommodate the upper solution to be peeled off by the peeling plate 130. As the distance between the peeling plates 130 increases, the drainage cavity 112b gradually shrinks. When the guide channel and the drainage channel change from a deviated state to an aligned state, the upper solution in the drainage cavity 112b is discharged into the collection tank 113 through the guide channel and the drainage channel. The support plate 131 supports the upper solution, causing the liquid level on the support plate 131 to gradually rise and the weight to increase.

[0044] The support plate 131 is sleeved with the inner wall of the collection tank 113. A drain pipe 105 connecting the collection tank 113 and a drain pipe 104 connecting the dehydration tank 112 are provided on the side wall of the support plate 100. The downward movement of the support plate 131 forces the pressure in the collection tank 113 below it to increase. As a result, the upper layer of solution in the dehydration tank 112 is gradually peeled off, resulting in a decrease in the weight of the liquid in the dehydration tank 112. The pressure of the liquid in the dehydration tank 112 on the air cushion 140 is weakened. The expansion of the air cushion 140 raises the liquid level in the dehydration tank 112. Thus, the upper layer of liquid that was not originally touched by the peeling plate 130 rises and is on the lateral movement path of the peeling plate 130, and is therefore peeled off by the peeling plate 130, improving the peeling effect on the upper layer of solution and reducing the water content of the solution.

[0045] Furthermore, when the stripping stage ends, the water in the dehydration chamber 112 is drained, and the solution on the support plate 131 is drained. At this point, the binding... Figure 7 As shown, due to the separation of the two peeling plates 130, an injection channel 112a is formed between the two peeling plates 130 to receive the mixed solution from the original liquid tank 111. A water guide pipe 111a is connected between the original liquid tank 111 and the dehydration tank 112 to guide the mixed solution into the dehydration tank 112. The water guide pipe 111a has an electric valve (which is prior art and is not shown in the figure). When the water in the dehydration tank 112 is discharged, the electric valve opens and the drain pipe 104 closes. The mixed solution collected in the original liquid tank 111 is discharged through the water guide pipe 111a. The solution is placed into the dehydration chamber 112. During this process, as the mixed solution in the original liquid chamber 111 decreases, the buoyancy of the float 124 decreases, which in turn weakens the downward pressure of the rocker arm 123 on the movable plate 122. At the same time, under the elastic potential energy of the tension spring 130b, the peeling plate 130 is pulled back to its original position. When the liquid guide plate 141 is disengaged from the stop plate 132, the liquid guide plate 141 moves upward to its original position under the action of the compression spring 142. The guide channel and the drain channel are once again in a deviated state, and the peeling plates 130 on both sides re-fit. Then the above process is repeated.

[0046] It should be noted that before the two stripping plates 130 are aligned, the mixed liquid in the original liquid chamber 111 has been completely discharged into the dehydration chamber 112, in order to prevent the original liquid in the original liquid chamber 111 from being discharged onto the stripping plate 130 when the stripping plates 130 are aligned, which would affect the dehydration effect.

[0047] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A distillation and dehydration apparatus for the preparation of trimethyl borate, characterized in that: It includes a support plate (100), a distillation tank (101) and a dehydration tank (110). A gas guide box (102) is connected between the distillation tank (101) and the dehydration tank (110). A condenser plate (103) is provided on the inner wall of the gas guide box (102). The end of the gas guide box (102) extends into the original liquid chamber (111) formed inside the dehydration tank (110). The dehydration tank (110) also has a liquid collection chamber (113) and a dehydration chamber (112) connected to the original liquid chamber (111). The liquid collection chamber (113) is used to collect the upper liquid from the dehydration chamber (112). During the liquid storage stage, a pushing mechanism (120) is provided inside the dehydration chamber (112). A reciprocating mechanism is provided below the pushing mechanism (120). The reciprocating mechanism includes a peeling plate (130) that moves laterally inside the dehydration chamber (112) directly below the pushing mechanism (120), and a carrying plate (131) that moves longitudinally inside the collection chamber (113). The carrying plate (131) is connected to an air cushion (140) at the bottom of the dehydration chamber (112). During the peeling stage, the pushing mechanism (120) uses buoyancy to drive the peeling plates (130) on both sides to move relative to each other. The peeling plate (130) is responsible for peeling off the upper layer solution according to a preset trajectory and transferring it to the collection chamber (113). During the peeling stage, the upper layer solution puts pressure on the carrying plate (131), forcing the air cushion (140) to expand, so as to raise the liquid level of the upper layer solution and appear on the peeling path of the peeling plate (130). The pushing mechanism (120) includes a pushing plate (121) located in the dehydration chamber (112). The bottom of the pushing plate (121) is conical and is used to drive the two peeling plates (130) on both sides to move relative to each other against the inclined surface of the pushing plate (121). A guide block (130a) is fixedly provided on the peeling plate (130) corresponding to the bottom of the pushing plate (121). The guide blocks (130a) on both sides are inclined outward to form an angle to receive the bottom of the pushing plate (121). The stripping plate (130) is "L" shaped, with its vertical end penetrating the side plate of the dehydration chamber (112), and a tension spring (130b) elastically connecting the vertical end and the side plate, while the other end extends downward into the upper solution to strip the upper solution from the dehydration chamber (112); A float plate (124) is provided in the original liquid tank (111). One end of a rocker arm (123) is rotatably mounted on the top of the float plate (124). The other end of the rocker arm (123) abuts against the upright. The rocker arm (123) rests on the side plate and is rotatably connected to the side plate. A movable plate (122) is fixed between the bottom of the upright and the push plate (121). The movable plate (122) is movably mounted in the dehydration tank (112).

2. The distillation and dehydration apparatus for the preparation of trimethyl borate according to claim 1, characterized in that: A liquid guide plate (141) is attached to the inside of the side plate to intercept the upper layer solution. A compression spring (142) supporting the bearing plate (131) is elastically connected between the bottom of the liquid guide plate (141) and the side plate. The top of the liquid guide plate (141) has a stop plate (132) fixed to the peeling plate (130). The end of the stop plate (132) is rounded so that the liquid guide plate (141) can slide smoothly into the stop plate (132).

3. The distillation and dehydration apparatus for the preparation of trimethyl borate according to claim 2, characterized in that: The liquid guide plate (141) has several guide grooves, and the side plate has a drain groove of the same size as the guide grooves. In the initial stage, the guide grooves and the drain grooves are in a deviated state. In the peeling stage, the guide grooves and the drain grooves are in an aligned state.

4. The distillation and dehydration apparatus for the preparation of trimethyl borate according to claim 1, characterized in that: A drainage cavity (112b) is formed between the peeling plate (130) and the side plate, the drainage cavity (112b) being used to contain the upper layer solution to be peeled off by the peeling plate (130); An injection channel (112a) is formed between the two peeling plates (130) to receive the mixed solution from the original liquid tank (111). A water guide pipe (111a) is connected between the original liquid tank (111) and the dehydration tank (112) to guide the mixed solution into the dehydration tank (112).

5. The distillation and dehydration apparatus for the preparation of trimethyl borate according to claim 2, characterized in that: The support plate (131) is sleeved with the inner wall of the liquid collection chamber (113). A drain pipe (105) connecting the liquid collection chamber (113) and a drain pipe (104) connecting the dehydration chamber (112) are provided on the side wall of the support plate (100).

6. A dehydration method according to the distillation and dehydration apparatus for the preparation of trimethyl borate as described in claim 1, characterized in that, The methods and steps include the following: S1. When the mixture in the original liquid tank (111) is injected into the dehydration tank (112), the extractant is injected into the dehydration tank (112) and allowed to react and stand for a period of time, so that the mixture can be separated into layers, that is, the upper layer is trimethyl borate and the lower layer is water. S2. The static pressure caused by the increase in liquid level in the original liquid tank (111) is used as the driving force to push the push plate (121) downward. The downward movement of the push plate (121) forces the two peeling plates (130) to move relative to each other and separate. The peeling plates (130) then peel off the upper layer of solution and transfer it to the collection tank (113) to achieve preliminary peeling. S3, and the support plate (131) presses air into the air cushion (140) and forces the air cushion (140) to expand, so that the liquid level of the upper solution in the dehydration chamber (112) rises and appears on the peeling path of the peeling plate (130) to achieve the peeling of the upper solution.

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