Silver nitrate inner bag cleaning method, device and system

Abstract

The application provides a silver nitrate inner bag cleaning method, device and system, the method comprising: adding a cleaning solution containing a reducing agent into a preset cleaning tank; placing a silver nitrate inner bag to be cleaned in the cleaning solution, and controlling the silver nitrate inner bag to perform tumbling cleaning in the cleaning solution; after cleaning for a preset time, cleaning the deposited impurities in the cleaning tank, and centrifugally drying the cleaned reaction solution to obtain residual silver powder. The application provides a silver nitrate inner bag cleaning device and method, which can realize automatic cleaning of the silver nitrate inner bag, does not need manual cleaning, saves labor cost, improves cleaning efficiency and reduces the risk of manual cleaning.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of silver powder preparation, and particularly relates to a silver nitrate inner bag cleaning method, device and system. BACKGROUND

[0002] Ultrafine silver powder is one of important raw materials for preparing conductive paste. A conventional silver powder preparation method usually uses silver nitrate to prepare silver powder. The conventional silver nitrate is usually placed in a silver nitrate inner bag. After use, there is a small amount of residue in the silver nitrate inner bag, which is difficult to clean completely at one time, causing certain loss. In the prior art, the residue in the inner bag is usually cleaned out by manual cleaning. The cleaning process is relatively cumbersome, the efficiency is low, and there is a certain safety risk. SUMMARY

[0003] Embodiments of the present application provide a silver nitrate inner bag cleaning method, which aims to solve the problem of low cleaning efficiency and high safety risk of cleaning the silver nitrate inner bag in the prior art.

[0004] In one aspect, the present application provides a silver nitrate inner bag cleaning method, which comprises:

[0005] adding a cleaning solution containing a reducing agent into a preset cleaning tank;

[0006] placing the silver nitrate inner bag to be cleaned in the cleaning solution, and controlling the silver nitrate inner bag to roll and clean in the cleaning solution;

[0007] after cleaning for a preset time, cleaning the deposited impurities in the cleaning tank and centrifuging and drying the cleaned reaction solution to obtain residual silver powder.

[0008] In some possible embodiments, the placing the silver nitrate inner bag to be cleaned in the cleaning solution, and controlling the silver nitrate inner bag to roll and clean in the cleaning solution comprises:

[0009] starting a rolling frame motor to control the silver nitrate inner bag to roll in the cleaning solution;

[0010] starting a bubbling motor to control the cleaning solution to impact the silver nitrate inner bag, so that the silver nitrate is dissolved in the cleaning solution and continuously reacts with the reducing agent in the cleaning solution.

[0011] In some possible embodiments, the placing the silver nitrate inner bag to be cleaned in the cleaning solution, and controlling the silver nitrate inner bag to roll and clean in the cleaning solution further comprises:

[0012] starting a filter device arranged on the side of the cleaning tank to connect the filter device and the cleaning tank;

[0013] During the cleaning process of the silver nitrate inner bag, the cleaning liquid is circulated between the cleaning tank and the filtering device.

[0014] In some possible embodiments, the placing of the silver nitrate inner bag to be cleaned in the cleaning liquid and the control of the silver nitrate inner bag to be cleaned in the cleaning liquid for rolling cleaning further include:

[0015] The preset cleaning liquid inlet is opened, and the cleaning liquid is continuously added to adjust the concentration of the reducing agent in the cleaning liquid.

[0016] In some possible embodiments, after the preset cleaning time, the deposited impurities in the cleaning tank are cleaned, and the cleaned reaction liquid is centrifuged to obtain residual silver powder.

[0017] After the preset cleaning time, the bubble motor and the frame rolling motor are turned off, and the cleaned silver nitrate inner bag is taken out.

[0018] The discharge pump on the cleaning tank is opened to discharge the cleaned reaction liquid into a preset concentrated water tank.

[0019] The reaction liquid in the concentrated water tank is centrifuged to obtain silver powder remaining in the centrifuge.

[0020] In some possible embodiments, after the discharge pump on the cleaning tank is opened to discharge the cleaned reaction liquid into a preset concentrated water tank, the method further includes:

[0021] The floating impurities in the filtering device are cleaned, and the deposited impurities in the cleaning tank are cleaned.

[0022] In some possible embodiments, the placing of the silver nitrate inner bag to be cleaned in the cleaning liquid and the control of the silver nitrate inner bag to be cleaned in the cleaning liquid for rolling cleaning include:

[0023] The frame rolling motor is started to control the silver nitrate inner bag to roll in the cleaning liquid.

[0024] The ultrasonic device is started to clean the silver nitrate inner bag by using ultrasonic waves, so that the silver nitrate is dissolved in the cleaning liquid and continuously reacts with the reducing agent in the cleaning liquid.

[0025] In some possible embodiments, the reducing agent is one or a mixture of several of ascorbic acid, hydrogen peroxide aqueous solution, and hydroquinone.

[0026] In the second aspect, the embodiments of the present application provide a silver nitrate inner bag cleaning device, which includes:

[0027] The cleaning tank is used to place the silver nitrate inner bag to be cleaned and the cleaning liquid.

[0028] A bubble motor is arranged on the outer side of the cleaning tank, and is used to generate high-pressure bubbles to clean the silver nitrate inner bag.

[0029] A frame turning motor is arranged on the outer side of the cleaning tank and on the same side as the bubble motor, and is used to control the cleaning liquid and the silver nitrate inner bag to tumble.

[0030] A filtering device is arranged on the outer side of the cleaning tank, and is arranged on the opposite side of the cleaning tank from the bubble motor and the frame turning motor, respectively, and is used to filter floating impurities in the cleaning liquid.

[0031] In a third aspect, the embodiments of the present application provide a silver nitrate inner bag cleaning system, which comprises the silver nitrate inner bag cleaning device described above, and further comprises a concentrated water tank and a centrifugal machine, the concentrated water tank is connected to the silver nitrate inner bag cleaning device and the centrifugal machine, respectively, and is used to load the cleaned reaction liquid, and the centrifugal machine is used to centrifugally clean the reaction liquid.

[0032] The embodiments of the present application provide a silver nitrate inner bag cleaning method, device and system, which comprises: adding a cleaning liquid containing a reducing agent into a preset cleaning tank; placing a silver nitrate inner bag to be cleaned in the cleaning liquid, and controlling the silver nitrate inner bag to tumble and clean in the cleaning liquid; after cleaning for a preset time, cleaning the deposited impurities in the cleaning tank and centrifugally drying the cleaned reaction liquid to obtain residual silver powder. The present application provides a silver nitrate inner bag cleaning device and cleaning method, which can realize automatic cleaning of the silver nitrate inner bag, without manual cleaning, saving labor cost, improving cleaning efficiency and reducing the risk of manual cleaning. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0034] Figure 1 An embodiment flowchart of a silver nitrate inner bag cleaning method provided by the embodiments of the present application;

[0035] Figure 2 An embodiment front view of a silver nitrate inner bag cleaning device provided by the embodiments of the present application. DETAILED DESCRIPTION

[0036] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0037] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0038] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0039] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0040] The following disclosure provides many different embodiments, or examples, for implementing different structures of the present application. For the purpose of simplifying the present application, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to numbers and / or letters in different examples, and such repetition is for the purpose of simplification and clarity, which does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those of ordinary skill in the art can realize the application of other processes and / or the use of other materials.

[0041] Specifically, as Figure 1 shown, it is an embodiment flow diagram of the silver nitrate inner bag cleaning method provided by the embodiment of the present application, which is applied to the process of preparing silver powder by using silver nitrate, and is applied to the silver nitrate inner bag cleaning device to clean the residual silver nitrate in the silver nitrate inner bag. Specifically, it can include the following steps:

[0042] 101. Add a cleaning solution containing a reducing agent to a preset cleaning tank.

[0043] 102. Place the silver nitrate inner bag to be cleaned in the cleaning solution, and control the silver nitrate inner bag to roll in the cleaning solution for cleaning.

[0044] 103. After cleaning for a preset time, clean the deposited impurities in the cleaning tank and centrifugally dry the cleaned reaction solution to obtain residual silver powder.

[0045] The silver nitrate inner bag cleaning method provided by the present application is mainly suitable for cleaning the packaging containing silver nitrate. In the actual process of preparing silver powder by using silver nitrate, there will be a small amount of residual silver nitrate in the packaging containing silver nitrate, which is difficult to clean. The silver nitrate inner bag cleaning method provided by the present application is mainly to clean the silver nitrate inner bag, which can reduce the residual silver nitrate, simplify the cleaning process and reduce the risk of the cleaning process.

[0046] As Figure 2 shown, it is an embodiment front view of the silver nitrate inner bag cleaning device provided by the embodiment of the present application. The following will explain in detail how to clean the silver nitrate inner bag by combining Figure 1 and Figure 2 As Figure 2 shown, the silver nitrate inner bag cleaning device 20 includes a semi-cylindrical cleaning tank 201, which is mainly used to place the silver nitrate inner bag to be cleaned and carry the cleaning solution. The size and shape of the cleaning tank are usually not limited. In Figure 2In the shown embodiment, the front view of the cleaning tank 201 can be a rectangular structure as a whole, and the silver nitrate inner bag cleaning device 20 further comprises a bubbling motor 202, which is arranged on the outer side of the cleaning tank 201; wherein the bubbling motor 202 can comprise a bubbling pipe for compressed air, and the compressed air can be sprayed out through the small holes of the bubbling pipe to generate high-pressure bubbles, so that the cleaning liquid in the cleaning tank is in a rolling state, and then the residual impurities on the silver nitrate inner bag are cleaned.

[0047] In Figure 2 , the silver nitrate inner bag cleaning device further comprises a frame turning motor 203, which is also arranged on the side of the cleaning tank 201; and the frame turning motor 203 and the bubbling motor 202 can be arranged on the same side of the cleaning tank 201, for example, both are arranged on the right side of the cleaning tank 201. The frame turning motor 203 in the present application is mainly used to control the rolling of the contents in the cleaning tank 201, for example, to control the rolling of the silver nitrate inner bag and the cleaning liquid, and then to clean the silver nitrate inner bag. While the frame turning motor 203 is used to control the rolling of the silver nitrate inner bag and the cleaning liquid, the bubbling motor 202 can also be used to generate high-pressure bubbles to further clean the silver nitrate inner bag, so that the impurities in the silver nitrate inner bag are more easily removed under strong air pressure.

[0048] In Figure 2 , the silver nitrate inner bag cleaning device further comprises a filtering device 204, which is also arranged on the side of the cleaning tank 201. Generally, the frame turning motor 203 and the bubbling motor 202 are arranged on the same side of the cleaning tank 201, such as being arranged on the right side of the cleaning tank 201; and the filtering device 204 is arranged on the other side of the cleaning tank 201, such as being arranged on the left side of the cleaning tank 201. The filtering device 204 is mainly used to filter out floating impurities during the cleaning process of the silver nitrate inner bag. In Figure 2 , the silver nitrate inner bag cleaning device further comprises a water outlet arranged on the same side as the filtering device 204, which is mainly used to drain the cleaning liquid in the cleaning tank after cleaning is completed.

[0049] The cleaning process of the silver nitrate inner bag cleaning method provided by the present application will be described in detail below. Figure 1 and Figure 2 First, a certain amount of cleaning liquid containing a reducing agent needs to be added to the cleaning tank 201, wherein the reducing agent can react with silver nitrate to obtain silver powder; that is, the silver nitrate inner bag residual cleaning method provided by the present application can not only effectively remove the residual silver nitrate in the silver nitrate inner bag, but also further prepare silver powder from silver nitrate.

[0050] In the embodiment of the present application, the silver nitrate inner bag to be cleaned is placed in the cleaning liquid, and the rolling cleaning of the silver nitrate inner bag in the cleaning liquid is controlled, comprising:

[0051] The frame turning motor is started to control the silver nitrate inner bag to tumble in the cleaning liquid; the bubbling motor is started to control the cleaning liquid to impact the silver nitrate inner bag, so that the silver nitrate is dissolved in the cleaning liquid and continuously reacts with the reducing agent in the cleaning liquid.

[0052] Specifically, after the silver nitrate inner bag to be cleaned and the cleaning liquid are placed in the cleaning tank, the motor can be started to clean the silver nitrate inner bag. In some embodiments, the frame turning motor 203 can be started, which drives the silver nitrate inner bag and the cleaning liquid to tumble, so as to clean the silver nitrate inner bag with the tumbling cleaning liquid. At the same time, the bubbling motor 202 can also be determined, which can generate compressed air and spray the compressed air into the cleaning liquid, thereby generating high-pressure bubbles in the cleaning liquid; the high-pressure bubbles can carry away the residues in the silver nitrate inner bag, achieving the purpose of cleaning the silver nitrate inner bag. While cleaning the residues in the silver nitrate inner bag, since the silver nitrate inner bag is soaked in the cleaning liquid, the remaining silver nitrate also reacts with the reducing agent in the cleaning liquid to obtain silver particles, thereby further reducing the loss rate of silver powder prepared from silver nitrate and obtaining more silver powder.

[0053] In the foregoing embodiments, the bubbling motor can generate high-pressure bubbles to clean the silver nitrate inner bag, and in other embodiments, a frame turning motor and an ultrasonic device can be provided on the cleaning tank, and at this time, the method of cleaning the silver nitrate inner bag can include: starting the frame turning motor to control the silver nitrate inner bag to tumble in the cleaning liquid; starting the ultrasonic device to clean the silver nitrate inner bag with ultrasonic waves, so that the silver nitrate is dissolved in the cleaning liquid and continuously reacts with the reducing agent in the cleaning liquid. That is, in other embodiments, ultrasonic waves can be used for cleaning.

[0054] In other embodiments, a brush roller can also be provided in the cleaning tank, and the brush roller can be arranged inside the cleaning tank; when the silver nitrate inner bag is controlled to tumble in the cleaning liquid, the brush roller can also be controlled to rotate to clean the silver nitrate inner bag, thereby improving the cleaning efficiency and cleaning effect.

[0055] In the embodiments of the present application, the silver nitrate inner bag cleaning device further comprises a control module 206, which further comprises a frame turning motor control unit, a bubbling motor control unit, etc. The operator can adjust the power of the frame turning motor and the bubbling motor according to actual needs, thereby controlling the cleaning efficiency of the silver nitrate inner bag. In the present application, the cleaning tank 201 is further provided with a filtering device 204, which is mainly used to remove floating impurities floating on the cleaning liquid. In some embodiments, the filtering device 204 can include a liquid storage groove protruding from the side of the cleaning tank, and the filtering device 204 further includes a filter screen fixed on the liquid storage groove and can be inclined with the liquid storage groove. When not cleaning, the cleaning tank 201 is generally not communicated with the liquid storage groove; when cleaning the silver nitrate inner bag, the filtering device provided on the side of the cleaning tank can be started to communicate the cleaning tank and the liquid storage groove. At this time, in the process of cleaning the silver nitrate inner bag, the cleaning liquid flows under the control of the frame turning motor and the bubbling motor, and the cleaning liquid can flow from the cleaning tank to the liquid storage groove; when flowing through the inclined filter screen, the floating impurities will be blocked by the filter screen and will not flow into the cleaning tank. That is, by controlling the cleaning liquid to flow and circulate between the cleaning tank and the filtering device, the filter screen in the filtering device can be used to filter out the floating impurities in the cleaning liquid, achieving the purpose of removing impurities. At the same time, the reaction liquid for removing floating impurities is recycled, which can save water and cost.

[0056] After cleaning for a certain period of time, the cleaning can be stopped and the impurities in the cleaning tank can be further removed. Specifically, it can include the following steps:

[0057] After cleaning for a predetermined period of time, the bubbling motor and the frame turning motor are turned off, and the cleaned silver nitrate inner bag is taken out; the discharge pump on the cleaning tank is opened to discharge the cleaned reaction liquid to a predetermined concentrated water tank; the reaction liquid in the concentrated water tank is centrifuged to obtain silver powder remaining in the centrifuge.

[0058] Specifically, after cleaning for a certain period of time, the bubble motor and the frame turning motor need to be turned off to stop the rolling of the cleaning liquid and the silver nitrate inner bag; then the cleaned silver nitrate inner bag needs to be removed, and the cleaning liquid in the silver nitrate inner bag needs to be drained as much as possible, that is, the silver nitrate inner bag needs to be dried. At this time, the cleaning tank 201 still contains the cleaned cleaning liquid, and the reducing agent in the cleaning liquid has reacted with the residual silver nitrate in the silver nitrate inner bag to obtain a reaction product such as silver powder. At this time, the discharge pump 205 provided on the cleaning tank 201 can be opened, wherein the discharge pump 205 can be provided on the same side of the cleaning tank 201 as the filter device 204, and the discharge pump 205 is provided at a position close to the ground of the cleaning tank 201. When the discharge pump 205 is opened, the reaction liquid in the cleaning tank 201 can be discharged; since the reaction liquid contains reaction products such as silver powder, the reaction liquid needs to be transported to a pre-set concentrated water tank for further treatment. After all the reaction liquid is discharged, the collected floating impurities in the filter device 204 need to be cleaned, and the deposited impurities in the cleaning tank need to be cleaned.

[0059] In the above embodiment, after the reaction liquid is transported to the concentrated water tank via the discharge pump, the concentrated water tank needs to be connected to the centrifuge to use the centrifuge to centrifuge the reaction liquid, thereby obtaining silver powder remaining in the centrifuge. That is, the silver nitrate inner bag cleaning method provided by the present application not only can clean the residual silver nitrate in the silver nitrate inner bag, but also can further obtain silver powder, thereby improving the yield of silver powder. When the silver powder is obtained by centrifugation, the obtained silver powder usually contains impurities, and the silver powder containing impurities needs to be washed to obtain the required silver powder. In a specific embodiment, the silver powder containing impurities can be washed with anhydrous ethanol for 3 times, and then washed with hot water for 3 times. The washed silver powder containing impurities is placed in a drying oven for drying for 6 hours, and finally the silver powder is obtained. The temperature of the hot water is between 60°C and 90°C, and the drying temperature of the drying oven is 70°C.

[0060] In some embodiments, the reducing agent that chemically reacts with silver nitrate can be: ascorbic acid, hydrogen peroxide aqueous solution, a mixture of one or more of hydroquinone. And in the embodiments of the present application, the power of structures such as bubble motor, frame motor, ultrasonic device, wool roller, etc. can be dynamically adjusted according to the cleaning time and cleaning effect; the concentration of the reducing agent in the cleaning solution can also be continuously adjusted according to the actual needs to achieve the optimal cleaning effect. It should be noted that the present application also provides a silver nitrate inner bag cleaning system, which comprises the silver nitrate inner bag cleaning device as described in any one of the preceding embodiments; and the thick water tank and centrifuge described in the foregoing embodiments are generally not structures in the silver nitrate inner bag cleaning device, but devices in the silver nitrate inner bag cleaning system. Among them. The thick water tank is connected with the silver nitrate inner bag cleaning device and the centrifuge respectively, the thick water tank is used to load the cleaned reaction liquid, and the centrifuge is used to centrifugally clean the cleaned reaction liquid.

[0061] In the above embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0062] The above describes in detail a silver nitrate inner bag cleaning method, device and system provided by the embodiments of the present application. This paper applies specific examples to explain the principles and implementation modes of the present application. The above description of the embodiments is only used to help understand the technical solutions and core ideas of the present application; those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A silver nitrate inner bag cleaning method characterized by, The method comprises: adding a cleaning solution containing a reducing agent into a preset cleaning tank; placing a silver nitrate inner bag to be cleaned in the cleaning solution, and controlling the silver nitrate inner bag to roll in the cleaning solution for cleaning; after cleaning for a preset time, cleaning the deposited impurities in the cleaning tank and centrifuging the cleaned reaction solution to obtain residual silver powder; the step of placing the silver nitrate inner bag to be cleaned in the cleaning solution and controlling the silver nitrate inner bag to roll in the cleaning solution for cleaning comprises: starting a rolling motor to control the silver nitrate inner bag to roll in the cleaning solution; starting a bubbling motor to control the cleaning solution to impact the silver nitrate inner bag, so that the silver nitrate is dissolved in the cleaning solution and continuously reacts with the reducing agent in the cleaning solution; the bubbling motor is used to generate high-pressure bubbles to impact the silver nitrate inner bag, so that the impurities in the silver nitrate inner bag fall off.

2. The silver nitrate inner bag cleaning method according to claim 1, characterized by, the step of placing the silver nitrate inner bag to be cleaned in the cleaning solution and controlling the silver nitrate inner bag to roll in the cleaning solution for cleaning further comprises: starting a filter device arranged on the side of the cleaning tank to connect the filter device and the cleaning tank; controlling the cleaning solution to flow and circulate between the cleaning tank and the filter device during the cleaning of the silver nitrate inner bag.

3. The silver nitrate inner bag cleaning method according to claim 1, characterized by, the step of placing the silver nitrate inner bag to be cleaned in the cleaning solution and controlling the silver nitrate inner bag to roll in the cleaning solution for cleaning further comprises: opening a preset cleaning solution inlet to continuously add the cleaning solution to adjust the concentration of the reducing agent in the cleaning solution.

4. The silver nitrate inner bag cleaning method according to claim 1, characterized by, the step of cleaning the deposited impurities in the cleaning tank and centrifuging the cleaned reaction solution to obtain residual silver powder after cleaning for a preset time comprises: after cleaning for a preset time, closing the bubbling motor and the rolling motor, and taking out the cleaned silver nitrate inner bag; opening a discharge pump on the cleaning tank to discharge the cleaned reaction solution into a preset concentrated water tank; centrifuging the reaction solution in the concentrated water tank to obtain silver powder remaining in the centrifuge.

5. The silver nitrate inner bag cleaning method according to claim 4, characterized by, after opening the discharge pump on the cleaning tank to discharge the cleaned reaction solution into the preset concentrated water tank, the method further comprises: cleaning the floating impurities in the filter device and the deposited impurities in the cleaning tank.

6. The silver nitrate inner bag cleaning method according to claim 1, characterized by, the step of placing the silver nitrate inner bag to be cleaned in the cleaning solution and controlling the silver nitrate inner bag to roll in the cleaning solution for cleaning comprises: starting a rolling motor to control the silver nitrate inner bag to roll in the cleaning solution; starting an ultrasonic device to clean the silver nitrate inner bag with ultrasonic waves, so that the silver nitrate is dissolved in the cleaning solution and continuously reacts with the reducing agent in the cleaning solution.

7. The silver nitrate inner bag cleaning method according to claim 1, characterized by, the reducing agent is one or a mixture of several of ascorbic acid, hydrogen peroxide aqueous solution, and hydroquinone.

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