Impregnation equipment

Abstract

The utility model relates to dipping equipment which comprises a dipping tank, a blending tank, an outer circulation mechanism, a liquid supplementing system and an online concentration meter. The online concentration meter can detect the current concentration of the impregnation liquid in the impregnation tank in real time, when the concentration of the impregnation liquid is too low, the liquid supplementing system conveys supplementing liquid with the concentration higher than the target concentration to the blending tank, and then the outer circulation mechanism drives the impregnation liquid to circulate so that the concentration of the impregnation liquid in the blending tank and the impregnation tank can rapidly rise and reach the target concentration. And when the concentration of the impregnation liquid is too high, the solvent is supplemented to the blending tank by the liquid supplementing system, and then is circulated by the outer circulating mechanism, so that the concentration of the impregnation liquid in the blending tank and the impregnation tank is rapidly reduced and reaches the target concentration. The weight of the replenisher or the solvent conveyed each time can be obtained according to the current concentration, the target concentration, the total weight of the impregnation liquid in the impregnation tank and the blending tank and the concentration of the replenisher. Therefore, under the cooperation of the liquid supplementing system and the online concentration meter, the concentration of the impregnation liquid in the impregnation tank can be accurately controlled.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel cell equipment, in particular to an impregnation device. Background Art

[0002] The carbon paper of fuel cells is generally formed by impregnation and curing of carbon felt sheets. The carbon felt is fully impregnated with an impregnation solution made of a mixture of phenolic resin and ethanol. The concentration of the impregnation solution has a key influence on the performance of the subsequent carbon paper. At present, the common way to control the concentration of the impregnation solution is to first take offline samples to detect the concentration of the impregnation solution, and then add the appropriate concentration of impregnation solution or ethanol according to the concentration, so as to achieve the purpose of controlling the concentration deviation. However, due to the time difference in offline detection, the requirement of precise concentration control cannot be achieved. Utility Model Content

[0003] Based on this, it is necessary to provide an impregnation device that can accurately control the concentration of the impregnation liquid to address the above problems.

[0004] An impregnation device comprises an impregnation tank, a mixing tank, an external circulation mechanism and a liquid replenishment system, wherein at least one of the impregnation tank and the mixing tank is equipped with an online concentration meter for detecting the current concentration of the impregnation liquid, the impregnation tank and the mixing tank are connected through the external circulation mechanism, and the external circulation mechanism can drive the impregnation liquid to circulate between the impregnation tank and the mixing tank;

[0005] The liquid replenishing system is in communication with the mixing tank, and can deliver a solvent or a replenishing liquid with a concentration higher than a target concentration into the mixing tank, so as to adjust the concentration of the impregnation liquid in the mixing tank and the impregnation tank to the target concentration.

[0006] In one embodiment, a first stirring mechanism and an ultrasonic disperser are provided in the immersion tank.

[0007] In one embodiment, the impregnation tank includes an outlet and an inlet connected to the external circulation mechanism, the outlet is located at the top of the impregnation tank, and the inlet is located at the bottom of the impregnation tank.

[0008] In one of the embodiments, a liquid level meter and a density sensor are provided on the mixing tank, wherein the liquid level meter can detect the liquid level of the impregnating liquid in the mixing tank, and the density sensor can detect the density of the impregnating liquid in the mixing tank.

[0009] In one of the embodiments, a second stirring mechanism is provided on the mixing tank.

[0010] In one embodiment, the liquid replenishment system includes a first storage tank, a second storage tank, a glue tank and a premixing tank; the first storage tank is used to store the solvent constituting the impregnation liquid and is connected to the glue tank, the premixing tank and the mixing tank, and the solvent stored in the first storage tank can be quantitatively transported to the glue tank, the premixing tank and the mixing tank respectively; the second storage tank is used to store the solute constituting the impregnation liquid and is connected to the glue tank, and the solute stored in the second storage tank can be quantitatively transported to the glue tank and mixed with the solvent to obtain a high-concentration solution;

[0011] The gelling tank is connected with the premixing tank, which is connected with the blending tank. The high-concentration solution in the gelling tank can be quantitatively transported to the premixing tank and mixed with the solvent to obtain a replenishing liquid. The replenishing liquid in the premixing tank can be transported to the blending tank.

[0012] In one embodiment, the first storage tank is connected to a delivery pump and a flow meter, and the delivery pump can quantitatively deliver the solvent in the first storage tank to the glue tank, the premixing tank and the preparation tank respectively.

[0013] In one embodiment, a first weighing component and a second weighing component are respectively disposed at the bottom of the second storage tank and the glue tank, and the first weighing component and the second weighing component can respectively detect the weight of the second storage tank and the glue tank.

[0014] In one of the embodiments, a third stirring mechanism and a fourth stirring mechanism are respectively disposed in the glue tank and the premixing tank.

[0015] In one of the embodiments, a concentration meter is provided on the premixing tank, and the concentration meter is used to detect the concentration of the supplementary liquid in the premixing tank.

[0016] In the above-mentioned impregnation equipment, the online concentration meter can detect the current concentration of the impregnation liquid in the impregnation tank in real time. When the concentration of the impregnation liquid is too low, the replenishing system will transport the replenishing liquid with a concentration higher than the target concentration to the mixing tank, and then the external circulation mechanism will drive the impregnation liquid to circulate so that the concentration of the impregnation liquid in the mixing tank and the impregnation tank will increase rapidly and reach the target concentration. When the concentration of the impregnation liquid is too high, the replenishing system will replenish the solvent to the mixing tank, and then the external circulation mechanism will circulate so that the concentration of the impregnation liquid in the mixing tank and the impregnation tank will decrease rapidly and reach the target concentration. The weight of the replenishing liquid or solvent transported each time can be obtained according to the current concentration, the target concentration, the total weight of the impregnation liquid in the impregnation tank and the mixing tank, and the concentration of the replenishing liquid. It can be seen that with the cooperation of the replenishing system and the online concentration meter, the concentration of the impregnation liquid in the impregnation tank can be accurately controlled. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is a schematic diagram of the structure of the impregnation equipment in a preferred embodiment of the utility model;

[0019] Figure 2 for Figure 1 A simplified module diagram of the impregnation equipment shown;

[0020] Figure 3 for Figure 1 Schematic diagram of the structure of the liquid replenishment system in the immersion equipment shown. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0022] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0024] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0026] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0027] See also Figure 1 and Figure 2 The impregnation device 10 in the preferred embodiment of the utility model includes an impregnation tank 100, a mixing tank 200, an external circulation mechanism 300, a liquid replenishing system 400 and an online concentration meter 500.

[0028] The impregnation tank 100 is used to contain the impregnation liquid, which is prepared by the corresponding solvent and solute in proportion. Specifically, the solvent can be ethanol and the solute can be resin. The carbon paper can be continuously conveyed in the impregnation tank 100 and is impregnated and solidified by the impregnation liquid. A guide wheel (not shown) can be set in the impregnation tank 100 in the conveying direction of the carbon paper, and the carbon paper passes through the guide wheel smoothly through the impregnation tank 100.

[0029] In this embodiment, a first stirring mechanism 110 and an ultrasonic disperser 120 are provided in the immersion tank 100. The first stirring mechanism 110 may be a pneumatic slow stirring device or a mechanical stirring device. The first stirring mechanism 110 and the ultrasonic disperser 120 can mix the immersion liquid in the immersion tank 100 evenly and prevent the solute from settling.

[0030] The preparation tank 200 is also used to contain the impregnation liquid. The impregnation tank 100 and the preparation tank 200 are connected through the external circulation mechanism 300. The external circulation mechanism 300 can drive the impregnation liquid to circulate between the impregnation tank 100 and the preparation tank 200. Specifically, the external circulation mechanism 300 generally includes a circulation pump and a pipeline connecting the impregnation tank 100 and the preparation tank 200. The circulation pump can drive the impregnation liquid to flow in the pipeline, thereby realizing circulation between the impregnation tank 100 and the preparation tank 200. Under the action of the external circulation mechanism 300, the impregnation liquid in the impregnation tank 100 and the preparation tank 200 can be dynamically mixed and uniform, and the concentration consistency between the two is high.

[0031] In this embodiment, the impregnation tank 100 includes an outlet 101 and an inlet 102 connected to the external circulation mechanism 300, the outlet 101 is located at the top of the impregnation tank 100, and the inlet 102 is located at the bottom of the impregnation tank 100. It can be seen that when the external circulation mechanism 300 drives the impregnation liquid to circulate, the impregnation liquid on the upper layer of the impregnation tank 100 overflows into the external circulation mechanism 300, and the impregnation liquid entering the external circulation mechanism 300 from the mixing tank 200 enters the impregnation tank 100 from the bottom of the impregnation tank 100. In this way, the impregnation liquid in the impregnation tank 100 can generate convection in the up and down directions, so that the concentration consistency of each place in the impregnation tank 100 is better.

[0032] In this embodiment, a second stirring mechanism 210 is provided on the mixing tank 200. The second stirring mechanism 210 can make the impregnation liquid in the mixing tank 200 mix more evenly and prevent the solute from settling. The second stirring mechanism 210 can adopt a structure in which a motor drives a stirring blade, and the stirring blade is located inside the mixing tank 200.

[0033] In addition, the mixing tank 200 is provided with a liquid level meter 220 and a density sensor (not shown), the liquid level meter 220 can detect the liquid level of the impregnation liquid in the mixing tank 200, and the density sensor can detect the density of the impregnation liquid in the mixing tank 200. According to the liquid level and density of the impregnation liquid, combined with the cross-sectional radius of the mixing tank 200, the total weight of the impregnation liquid in the mixing tank 200 can be obtained.

[0034] Of course, in other embodiments, the total weight of the impregnation liquid in the mixing tank 200 can also be obtained by setting a weighing instrument at the bottom of the mixing tank 200 .

[0035] An online concentration meter 500 is installed on at least one of the impregnation tank 100 and the mixing tank 200. The online concentration meter 500 is used to detect the current concentration of the impregnation liquid. Specifically, in this embodiment, the online concentration meter 500 is arranged in the impregnation tank 100 and can detect the concentration of the impregnation liquid in the impregnation tank 100. The continuous running of the carbon paper in the impregnation tank 100 will take away the solvent and solute of the impregnation liquid at the same time, thereby causing the concentration of the impregnation liquid in the impregnation tank 100 to fluctuate and deviate from the target concentration. By detecting the concentration of the impregnation liquid with the online concentration meter 500, it can be known whether the current concentration of the impregnation liquid deviates from the target concentration.

[0036] The replenishing system 400 is connected to the mixing tank 200, and the replenishing system 400 can transport a solvent or a replenishing liquid with a concentration higher than the target concentration into the mixing tank 200 to adjust the concentration of the impregnation liquid in the mixing tank 200 and the impregnation tank 100 to the target concentration. The solvent is the solvent constituting the impregnation liquid, and the replenishing liquid has the same composition as the impregnation liquid, but the concentration of the solute is higher.

[0037] When the online concentration meter 500 detects that the concentration of the impregnation liquid in the impregnation tank 100 is lower than a certain range of the target concentration (generally 0.15%), the replenishing liquid with a concentration higher than the target concentration is transported to the mixing tank 200 by the replenishing system 400, and then the external circulation mechanism 300 drives the impregnation liquid circulation to rapidly increase the concentration of the impregnation liquid in the mixing tank 200 and the impregnation tank 100 and reach the target concentration.

[0038] Specifically, the weight G1 of the required supplementary liquid can be obtained according to the current concentration of the impregnation liquid, the target concentration, the total weight of the impregnation liquid in the impregnation tank 100 and the mixing tank 200, and the concentration of the supplementary liquid. Wherein, G1 = (A + B) * (N - N2) / (MN), A is the weight of the impregnation liquid in the impregnation tank 100, B is the weight of the impregnation liquid in the mixing tank 200, N is the target concentration, N1 is the current concentration, and M is the concentration of the supplementary liquid.

[0039] When the online concentration meter 500 detects that the concentration of the impregnation liquid in the impregnation tank 100 is higher than a certain range of the target concentration, the liquid replenishing system 400 replenishes the solvent to the preparation tank 200, thereby diluting the impregnation liquid, and then the external circulation mechanism 300 circulates so that the concentration of the impregnation liquid in the preparation tank 200 and the impregnation tank 100 is quickly reduced and reaches the target concentration. Specifically, the weight G2 of the required solvent can be obtained according to the current concentration of the impregnation liquid, the target concentration, and the total weight of the impregnation liquid in the impregnation tank 100 and the preparation tank 200. Wherein, G2 = (A + B) * N1 / N-(A + B).

[0040] The online concentration meter 500 can be connected to the host computer system (not shown) for communication, and can feed back the detected current concentration to the host computer system. When the current concentration of the impregnation liquid is too low or too high, the host computer system can calculate the weight of the supplementary liquid or solvent to be added based on the weight of the impregnation liquid in the impregnation tank 100, the weight of the impregnation liquid in the preparation tank 200, the current concentration of the target concentration, and the concentration of the supplementary liquid, and then control the liquid replenishment system 400 to deliver the corresponding weight of the supplementary liquid or solvent to the preparation tank 200. It can be seen that with the cooperation of the liquid replenishment system 400 and the online concentration meter 500, the concentration of the impregnation liquid can be accurately controlled.

[0041] Moreover, since the replenishing liquid and solvent transported by the replenishing system 400 are transitioned through the mixing tank 200 and are not directly added to the immersion tank 100, it is possible to avoid a sudden increase or decrease in the local concentration in the immersion tank 100, so as to ensure that the concentration of the immersion liquid in the immersion tank 100 can be evenly increased or decreased, thereby improving the consistency of the concentration of the immersion liquid in various locations in the immersion tank 100.

[0042] Please also read Figure 3 In this embodiment, the liquid replenishing system 400 includes a first storage tank 410, a second storage tank 420, a glue tank 430 and a premixing tank 440. The first storage tank 410 is used to store the solvent constituting the impregnation liquid and is connected to the glue tank 430, the premixing tank 440 and the mixing tank 200. The solvent stored in the first storage tank 410 can be quantitatively transported to the glue tank 430, the premixing tank 440 and the mixing tank 200.

[0043] Furthermore, the second storage tank 420 is used to store the solute constituting the impregnation solution and is connected to the gelling tank 430. The solute stored in the second storage tank 420 can be quantitatively transported to the gelling tank 430 and mixed with the solvent to obtain a high-concentration solution. The gelling tank 430 is connected to the premixing tank 440, and the premixing tank 440 is connected to the preparation tank 200. The high-concentration solution in the gelling tank 430 can be quantitatively transported to the premixing tank 440 and mixed with the solvent to obtain a replenishing solution, and the replenishing solution in the premixing tank 440 can be transported to the preparation tank 200.

[0044] When the online concentration meter 500 detects that the concentration of the impregnation liquid in the impregnation tank 100 is too high, the solvent stored in the first storage tank 410 can be directly transported to the mixing tank 200 according to the required weight, so that the impregnation liquid in the impregnation tank 100 can be restored to the target concentration.

[0045] When the online concentration meter 500 detects that the concentration of the impregnation liquid in the impregnation tank 100 is too low, the liquid replenishment system 400 first prepares the required weight and concentration of the replenishment liquid in the premixing tank 440, and then transports the prepared replenishment liquid from the premixing tank 440 to the mixing tank 200. Specifically, since the colloidal solute is difficult to dissolve in a short time, the solute is first transported from the second storage tank 420 to the gelling tank 430, and a certain amount of solvent is transported to the gelling tank 430 to dilute the solute for the first time, thereby obtaining a high-concentration solution. Then, a certain amount of the high-concentration solution is transported to the premixing tank 440, and the solvent is transported to the premixing tank 440 for a second dilution, until a replenishment liquid with a concentration and weight that meets the requirements is obtained.

[0046] Pumping components may be provided between the second storage tank 42 and the gelling tank 430, between the gelling tank 430 and the premixing tank 440, and between the premixing tank 440 and the blending tank 200, so as to respectively realize the transportation of the solute, the high concentration solution and the supplementary liquid. At this time, the height difference may also be provided so as to realize the transportation of the solute, the high concentration solution and the supplementary liquid under the action of gravity.

[0047] It should be noted that, in other embodiments, if the solute is easily soluble, the gelling tank 430 may be omitted, so that the solute is directly transported from the second storage tank 420 to the premixing tank 440 and the replenishing liquid is prepared.

[0048] Specifically, in this embodiment, the first storage tank 410 is connected to a delivery pump 450 and a flow meter 460, and the delivery pump 460 can quantitatively deliver the solvent in the first storage tank 410 to the glue tank 430, the premix tank 440 and the blending tank 200. The flow meter 460 can be a weight flow meter, which is arranged on the output main pipeline of the first storage tank 410, so the solvent delivered to the glue tank 430, the premix tank 440 and the blending tank 200 flows through the flow meter 460. Therefore, the flow meter 460 can monitor the solvent entering the glue tank 430, the premix tank 440 and the blending tank 200 in real time, so as to facilitate the quantitative delivery of the solvent.

[0049] In addition, in this embodiment, a first weighing assembly 470 and a second weighing assembly 480 are respectively disposed at the bottom of the second storage tank 420 and the glue tank 430 , and the first weighing assembly 470 and the second weighing assembly 480 can respectively detect the weight of the second storage tank 420 and the glue tank 430 .

[0050] The first weighing component 470 can obtain the weight of the solute delivered to the degumming tank 430 by detecting the weight change of the second storage tank 420, thereby facilitating the quantitative delivery of the solute; and the second weighing component 480 can obtain the weight of the high-concentration solution entering the premixing tank 440 by detecting the weight change of the degumming tank 430, thereby facilitating the quantitative delivery of the high-concentration solution.

[0051] In this embodiment, the third stirring mechanism 431 and the fourth stirring mechanism 441 are respectively provided in the gelling tank 430 and the premixing tank 440. The third stirring mechanism 431 and the fourth stirring mechanism 441 can adopt the same structure as the second stirring mechanism 210. Under the stirring of the third stirring mechanism 431, the speed of the first dilution of the solute can be accelerated and the uniformity of the high-concentration solution can be improved. Similarly, the fourth stirring mechanism 441 can accelerate the speed of the second dilution and improve the uniformity of the supplementary solution.

[0052] In this embodiment, a concentration meter 442 is provided on the premixing tank 440, and the concentration meter 442 is used to detect the concentration of the supplementary liquid in the premixing tank 440. The concentration meter 442 monitors the concentration of the supplementary liquid in the premixing tank 440 in real time, and it can be determined whether the prepared supplementary liquid meets the requirements.

[0053] The above-mentioned impregnation equipment 100 and the online concentration meter 500 can detect the current concentration of the impregnation liquid in the impregnation tank 100 in real time. When the concentration of the impregnation liquid is too low, the replenishing system 400 delivers the replenishing liquid with a concentration higher than the target concentration to the mixing tank 200, and then the external circulation mechanism 300 drives the impregnation liquid to circulate so that the concentration of the impregnation liquid in the mixing tank 200 and the impregnation tank 100 increases rapidly and reaches the target concentration. When the concentration of the impregnation liquid is too high, the replenishing system 400 replenishes the solvent to the mixing tank 200, and then the external circulation mechanism 300 circulates so that the concentration of the impregnation liquid in the mixing tank 200 and the impregnation tank 100 decreases rapidly and reaches the target concentration. The weight of the replenishing liquid or solvent delivered each time can be obtained according to the current concentration, the target concentration, the total weight of the impregnation liquid in the impregnation tank 100 and the mixing tank 200, and the concentration of the replenishing liquid. It can be seen that with the cooperation of the liquid replenishing system 400 and the online concentration meter 500 , the concentration of the impregnation liquid in the impregnation tank 100 can be accurately controlled.

[0054] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0055] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. An impregnation device, characterized in that: It includes an immersion tank, a mixing tank, an external circulation mechanism and a liquid replenishment system. At least one of the immersion tank and the mixing tank is equipped with an online concentration meter for detecting the current concentration of the immersion liquid. The immersion tank and the mixing tank are connected through the external circulation mechanism, and the external circulation mechanism can drive the immersion liquid to circulate between the immersion tank and the mixing tank. The liquid replenishing system is in communication with the mixing tank, and can deliver a solvent or a replenishing liquid with a concentration higher than a target concentration into the mixing tank, so as to adjust the concentration of the impregnation liquid in the mixing tank and the impregnation tank to the target concentration.

2. The impregnation device according to claim 1, characterized in that The immersion tank is provided with a first stirring mechanism and an ultrasonic disperser.

3. The impregnation device according to claim 1, characterized in that The impregnation tank comprises an outlet and an inlet which are connected to the external circulation mechanism, the outlet is located at the top of the impregnation tank, and the inlet is located at the bottom of the impregnation tank.

4. The impregnation device according to claim 1, characterized in that The mixing tank is provided with a liquid level meter and a density sensor. The liquid level meter can detect the liquid level of the impregnating liquid in the mixing tank, and the density sensor can detect the density of the impregnating liquid in the mixing tank.

5. The impregnation device according to claim 1, characterized in that The mixing tank is provided with a second stirring mechanism.

6. The impregnation device according to claim 1, characterized in that The liquid replenishment system includes a first storage tank, a second storage tank, a glue tank and a premixing tank; the first storage tank is used to store the solvent constituting the impregnation liquid and is connected to the glue tank, the premixing tank and the mixing tank, and the solvent stored in the first storage tank can be quantitatively transported to the glue tank, the premixing tank and the mixing tank respectively; the second storage tank is used to store the solute constituting the impregnation liquid and is connected to the glue tank, and the solute stored in the second storage tank can be quantitatively transported to the glue tank and mixed with the solvent to obtain a high-concentration solution; The gelling tank is connected with the premixing tank, which is connected with the blending tank. The high-concentration solution in the gelling tank can be quantitatively transported to the premixing tank and mixed with the solvent to obtain a replenishing liquid. The replenishing liquid in the premixing tank can be transported to the blending tank.

7. The impregnation device according to claim 6, characterized in that The first storage tank is connected to a delivery pump and a flow meter, and the delivery pump can quantitatively deliver the solvent in the first storage tank to the glue tank, the premixing tank and the preparation tank respectively.

8. The impregnation device according to claim 6, characterized in that The bottoms of the second storage tank and the glue tank are respectively provided with a first weighing component and a second weighing component, and the first weighing component and the second weighing component can respectively detect the weight of the second storage tank and the glue tank.

9. The impregnation device according to claim 6, characterized in that The third stirring mechanism and the fourth stirring mechanism are respectively arranged in the glue tank and the premixing tank.

10. The impregnation device according to claim 6, characterized in that The premixing tank is provided with a concentration meter, and the concentration meter is used to detect the concentration of the supplementary liquid in the premixing tank.

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