Nano-silver particle waste liquid recovery treatment device and recovery method

Abstract

The invention relates to the field of waste liquid recovery, and discloses a nano-silver particle waste liquid recovery treatment device and a recovery method.The nano-silver particle waste liquid recovery treatment device comprises a freeze-drying bin, a feeding assembly is installed at the top end of one side of the freeze-drying bin, the feeding assembly can crush and stir nano-silver particle waste liquid multiple times, and a blowing fan is installed on the other side of the freeze-drying bin; a discharging assembly is installed on the side, away from the freeze-drying bin, of the blowing fan, and a side base plate is installed between the bottom end of the discharging assembly and the working table face. A dust raising prevention assembly is arranged at the end, away from the blowing fan, of the discharging assembly and can control the dried nano-silver particles. The device has the beneficial effects that the molecular weight of nano-silver particles is reduced through the freeze-drying technology of the feeding assembly and the freeze-drying bin, the preset molecular weight is achieved, the mesh number of the nano-silver particles is increased through multiple times of smashing and grinding, and raw materials can be more uniformly frozen on the premise that the characters and stability of nano-silver are kept through the freeze-drying technology of the freeze-drying bin.

Description

Technical Field

[0001] The invention relates to the field of waste liquid recovery, in particular to a nano silver particle waste liquid recovery and treatment device and a recovery method. Background Art

[0002] There are many products made of nanosilver in our daily life. Analysis shows that nanosilver will be released from the products. Some of the nanosilver will be deposited in the sewer system, but most of it will flow into the urban sewage treatment plant with the sewage. Nanosilver has certain toxicity to microorganisms, aquatic organisms, plants and mammals, and shows a transmission effect in the food chain. Biological treatment of sewage is a key process in urban sewage treatment plants. Nanosilver in sewage may affect its efficiency and thus affect the treatment effect of sewage. Therefore, it is necessary to pre-treat the sewage before the nanosilver is discharged so that the nanosilver sewage will not affect the food chain.

[0003] The existing Chinese patent with publication number CN108480647B discloses a method for recycling nanosilver particle waste liquid, including: collecting waste liquid step: centrifuging the nanosilver particle stock liquid, pouring out the upper clear liquid, collecting the turbid liquid in the middle and bottom layers to obtain waste liquid; stirring step: stirring the waste liquid evenly, and calculating the silver content in the waste liquid; reaction step: placing the waste liquid in a fume hood, adding ammonia water with a concentration of 5% while stirring: stirring after adding ammonia water, and then standing to obtain a reaction liquid; centrifugation step: centrifuging the reaction liquid to obtain a centrifuge liquid; drying step: drying the centrifuge liquid to obtain a silver block; grinding step: grinding and crushing the silver block to obtain micron silver particles. The present invention can simply and effectively recycle the silver in the nanosilver particle waste liquid, reduce the waste of silver, avoid pollution to the environment, and greatly reduce the use of oxidants such as hydrogen peroxide, and has the characteristics of high recovery rate, low cost and convenient operation. ;

[0004] In response to the above issues:

[0005] 1. First of all, nanosilver is a very small molecular weight object. The traditional crushing method cannot achieve the expected grinding and crushing effect. In addition, the waste liquid of nanosilver particles needs to be dried. Drying and heating will cause its denaturation and produce greater toxicity.

[0006] 2. The molecular weight of the ground micron silver particles is smaller. Because the amount of waste liquid to be recovered is limited, the powder is raised during the transmission process, and the final amount of silver recovered is even less, resulting in a lower recovery efficiency in actual use. Summary of the invention

[0007] The purpose of the present invention is to provide a nanosilver particle waste liquid recovery and treatment device and a recovery method to solve the problem of insufficient crushing effect and recovery efficiency of small molecule nanosilver particles proposed in the above background technology.

[0008] The technical solution of the present invention is: a nanosilver particle waste liquid recovery and treatment device and recovery method, comprising a freeze-drying chamber, a control panel is installed on one side of the freeze-drying chamber, and the freeze-drying chamber can freeze the nanosilver particle waste liquid:

[0009] A feeding assembly is installed at the top of one side of the freeze-drying chamber, the feeding assembly can crush and stir the nano silver particle waste liquid multiple times, and the feeding assembly includes a cutting blade, and the cutting blade is arranged at the top of one side of the freeze-drying chamber;

[0010] A discharging assembly, wherein a blowing fan is installed on the other side of the freeze-drying bin, and a discharging assembly is installed on the side of the blowing fan away from the freeze-drying bin, the discharging assembly comprises a movable discharging port, and the movable discharging port is arranged at the outlet of the blowing fan, and a side pad is installed between the bottom end of the discharging assembly and the work surface;

[0011] An anti-dust component is provided at one end of the discharging component away from the blowing fan, the anti-dust component can control the nano silver particles after drying, and the anti-dust component includes a powder pressing plate, which is arranged at the top of the outlet of the discharging component.

[0012] Furthermore, the feed assembly also includes a feed port, the bottom end of the feed port is fixed to the freeze-drying chamber and is internally connected, and the bottom of the feed port has a shape with a convex middle and a concave edge.

[0013] Furthermore, a discharge chute is provided in the recessed area at the bottom of the feed inlet, and a control panel is provided at one end of the feed inlet, and the discharge chute is controlled by the control panel.

[0014] Furthermore, a transmission motor is installed at the bottom end of the feed port, and the output end of the transmission motor is connected to a transmission gear, a stirring rod is provided on one side of the transmission gear, and the stirring rod and the transmission gear are driven by meshing, the top end of the stirring rod is fixedly connected to the cutting blade, and the cutting blade has an inclined shape, and a buffer ring is provided at the connection between the stirring rod and the bottom end of the feed port.

[0015] Furthermore, one side of the freeze-drying chamber is equipped with a temperature control plate that can control the internal temperature of the freeze-drying chamber.

[0016] Furthermore, the discharge port of the blowing fan is equipped with a fixed discharge port, and the fixed discharge port is sleeved on the outside of the movable discharge port. The movable discharge port is provided with two groups. The top of the fixed discharge port is equipped with a rotating motor, and the output end of the rotating motor is connected to the top of the movable discharge port through a second hinged rod.

[0017] Furthermore, a material guide trough is provided at one end of the fixed discharge port away from the blowing fan, and two groups of material guide troughs are provided inside the material guide trough, and the material guide trough is provided at the bottom end of the movable discharge port, and the end of the movable discharge port away from the fixed discharge port is hinged to the material guide trough through a first hinge rod, and an anti-backflow roller is provided at one end of the material guide trough away from the anti-dust assembly.

[0018] Furthermore, the side pad has an inclined shape with different heights on both sides, and the height of the side pad close to the blowing fan is higher than the height of the side pad close to the anti-dust assembly. Three groups of buffers are installed on the top of the side pad, and the top of the buffer is fixed to the material guide trough.

[0019] Furthermore, the anti-dust assembly also includes a support frame, and the bottom end of the support frame is fixed to the work surface, a first screw lift is installed at one end of the support frame close to the discharge assembly, and a second screw lift is installed at the output end of the first screw lift, the output end of the second screw lift is fixed to a powder pressing plate, and the powder pressing plates are provided in two groups, and the two groups of powder pressing plates are connected by parallel rods.

[0020] A nano silver particle waste liquid recovery and treatment device and recovery method, comprising the following steps:

[0021] S1 Recovers waste liquid of nanosilver particles from pharmaceutical, textile, detergent and children's toy products;

[0022] S2: the waste liquid of nano-silver particles is put into the feeding assembly of the waste liquid of nano-silver particles recycling and processing device, the power is turned on first, and then the control panel is operated to start the transmission motor to drive the stirring rod to rotate through the transmission gear, and the stirring rod drives the cutting blade to rotate and crush the waste liquid of nano-silver particles in the feeding port, so as to reduce the molecular weight of the waste liquid of nano-silver particles. When the effect of preliminary crushing is achieved, it is convenient to open the discharge trough so that the waste liquid of nano-silver particles falls into the freeze-drying chamber;

[0023] S3 controls the control panel and the temperature control board to make the nanosilver particle waste liquid undergo a freezing process inside the freeze-drying chamber, specifically by utilizing the three-phase change of water; firstly, the nanosilver particle waste liquid containing a large amount of water is cooled and frozen into a solid in advance, and then the solid water is directly sublimated into a gaseous state under vacuum conditions, while the nanosilver particles themselves remain in the ice shelf when frozen, so their volume remains unchanged after drying, because solid water absorbs heat when sublimating, causing the temperature of the product itself to drop and slowing down the sublimation speed. In order to increase the sublimation speed and shorten the drying time, the nanosilver particle waste is appropriately heated at the same time;

[0024] After preliminary drying in the freeze-drying chamber, S4 introduces the nanosilver particles into the blowing fan, which blows the powder away to prevent the powder from agglomerating and facilitate water evaporation;

[0025] After passing through the blowing fan, the S5 nano-silver particles continue to fall due to gravity. The buffer component buffers the falling force during material discharge to suppress the lifting of the dried powder. The control panel starts the rotating motor to drive the movable discharge ports on both sides of the fixed discharge port to move back and forth, so that the powdered nano-silver particle waste can be discharged more quickly. After discharge, the material is restricted inside the feed trough. Due to the height difference on both sides of the side pad, the powder automatically flows to the side away from the outlet of the movable discharge port.

[0026] The S6 operation control panel controls the movement of the first screw lift and the second screw lift. The second screw lift moves up and down to drive the powder pressing plate to press down and drive the airflow in the air, blowing the processed nano silver particle waste out of the discharge hole:

[0027] Firstly, the nanosilver particle waste liquid is mixed before the waste liquid is frozen by the feeding component, so as to initially reduce the molecular weight of the nanosilver particles and improve the uniformity of the waste liquid. In addition, in order to improve the crushing effect and achieve the preset molecular weight, the mesh size of the nanosilver particles can be increased by multiple crushing and grinding to make it finer, because a single grinding to achieve the expected molecular weight requires the use of a precision grinding machine, which requires a lot of power and cost. In addition, the freeze-drying operation of the freeze-drying chamber is convenient for assisting the crushing of the nanosilver particle waste liquid. The traditional drying and heating methods will cause the nanosilver to denature and produce greater toxicity, affect the health of the operator, and increase the difficulty of subsequent purification. The freeze-drying technology of the freeze-drying chamber can freeze the raw materials more evenly while maintaining the properties and stability of the nanosilver, and cooperate with the crushing effect for better; the reason for pursuing a small molecular weight is that the smaller the molecular weight of the nanosilver particle waste liquid, the better the purification of the nanosilver waste can be carried out.

[0028] Secondly, the blowing fan can be used to disperse the nano-silver particle powder to prevent it from agglomerating. There are many reasons for the agglomeration of nano-silver particle powder, including excessive moisture and viscosity between molecules. The blowing fan can disperse the powder to a certain extent, facilitating the evaporation of moisture, thereby obtaining a purer silver substance.

[0029] The discharge component is used to assist in the discharge of materials. The powdered silver material after drying is solid and its fluidity is not as good as that of liquid nanosilver particle waste liquid. In addition to using gravity to discharge it, it also requires external intervention. Shaking and vibrating can make the powdered solid silver material be discharged more quickly. The beneficial effect of the discharge component is that shaking the active discharge port can make the powdered solid silver material be discharged more quickly. In addition, the height difference on both sides of the side pad makes the solid silver material automatically flow to the side away from the outlet of the active discharge port due to gravity. The function of the buffer is to buffer the pressure during material discharge and play a role in suppressing the lifting of solid silver material powder. Finally, the anti-dust component is used to assist in the discharge of materials from the discharge hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention will be further explained below in conjunction with the accompanying drawings and Examples:

[0031] Figure 1 It is a schematic diagram of the first three-dimensional appearance structure of the present invention;

[0032] Figure 2 For the present invention Figure 1 The enlarged structural diagram at A in the middle;

[0033] Figure 3 It is a schematic diagram of a second three-dimensional appearance structure of the present invention;

[0034] Figure 4 It is a schematic diagram of a third three-dimensional appearance structure of the present invention;

[0035] Figure 5 For the present invention Figure 4 The enlarged structural diagram at B in the middle;

[0036] Figure 6 For the present invention Figure 4 The enlarged structural diagram at C in the middle;

[0037] Figure 7 It is a three-dimensional enlarged schematic diagram of the side pad of the present invention;

[0038] Figure 8 It is a front cross-sectional structural schematic diagram of the present invention;

[0039] Fig. 9 For the present invention Figure 8 Enlarged structural diagram at D in the middle.

[0040] Explanation of the reference numerals: 1. freeze-drying chamber; 2. feeding assembly; 201. feeding port; 202. discharging chute; 203. transmission motor; 204. transmission gear; 205. stirring rod; 206. buffer ring; 207. cutting blade; 3. control panel; 4. blowing fan; 5. discharging assembly; 501. fixed discharging port; 502. movable discharging port; 503. first hinged rod; 504. first feed chute; 505. second hinged rod; 506. rotating motor; 507. anti-backflow roller; 508. second feed chute; 6. anti-dust assembly; 601. support frame; 602. first screw lift; 603. second screw lift; 604. powder pressing plate; 605. parallel rod; 7. side pad; 8. buffer; 9. discharging hole; 10. temperature control plate. DETAILED DESCRIPTION

[0041] The following will be combined with the attached Figures 1 to 9The present invention is described in detail, and the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] The present invention provides a nanosilver particle waste liquid recovery and treatment device and recovery method by improvement. The device and recovery method include a freeze drying chamber 1, a control panel 3 is installed on one side of the freeze drying chamber 1, the freeze drying chamber 1 can freeze the nanosilver particle waste liquid, the freeze drying technology of the freeze drying chamber 1 is convenient for assisting in crushing the nanosilver particle waste liquid, the traditional drying and heating method will cause the nanosilver to denature and produce greater toxicity, affect the health of the operator, and increase the difficulty of later purification, the freeze drying technology of the freeze drying chamber 1 can freeze the raw materials more evenly under the premise of maintaining the properties and stability of the nanosilver, and the crushing effect is better; the reason for pursuing a small molecular weight is that the smaller the molecular weight of the nanosilver particle waste liquid, the better the purification treatment of the nanosilver waste can be performed, and one side of the freeze drying chamber 1 is equipped with a temperature control plate 10 that can control the internal temperature of the freeze drying chamber 1:

[0043] The control panel 3 and the temperature control board 10 are operated to make the nanosilver particle waste liquid undergo a freezing process inside the freeze-drying chamber 1, specifically by utilizing the three-phase change of water; firstly, the nanosilver particle waste liquid containing a large amount of water is cooled and frozen into a solid in advance, and then the solid water is directly sublimated into a gaseous state under vacuum conditions, while the nanosilver particles themselves remain in the ice shelf when frozen, so their volume remains unchanged after drying, because the solid water absorbs heat when sublimating, causing the temperature of the product itself to drop and slowing down the sublimation speed. In order to increase the sublimation speed and shorten the drying time, the nanosilver particle waste is appropriately heated at the same time;

[0044] like Fig. 9 As shown: a feed component 2 is installed at the top of one side of the freeze-drying chamber 1. The feed component 2 is used to mix the nanosilver particles and the waste liquid before freezing the waste liquid, so as to initially reduce the molecular weight of the nanosilver particles and improve the uniformity of the waste liquid. In addition, in order to improve the effect of pulverization and achieve a preset molecular weight, the mesh size of the nanosilver particles can be increased by multiple pulverization and grinding to make it finer, because a single grinding to achieve the expected molecular weight requires the use of a precision grinding machine, which requires a lot of power and cost;

[0045] The feeding component 2 can crush and stir the nano silver particle waste liquid for multiple times. When in use, the nano silver particle waste liquid is put into the feeding component 2 in the nano silver particle waste liquid recovery and treatment device, and the feeding component 2 includes a cutting blade 207, and the cutting blade 207 is arranged at the top of one side of the freeze drying chamber 1;

[0046] The feed assembly 2 further includes a feed port 201, the bottom end of the feed port 201 is fixed to the freeze-drying chamber 1 and is internally connected, and the bottom of the feed port 201 is convex in the middle and concave at the edge;

[0047] The concave portion at the bottom of the feed inlet 201 is provided with a discharge trough 202. When the initial crushing effect is achieved, the discharge trough 202 is conveniently opened to allow the nanosilver particle waste liquid to fall into the freeze-drying chamber 1. A control panel 3 is provided at one end of the feed inlet 201, and the discharge trough 202 is controlled by the control panel 3.

[0048] A transmission motor 203 is installed at the bottom end of the feed port 201, and a transmission gear 204 is connected to the output end of the transmission motor 203. A stirring rod 205 is arranged on one side of the transmission gear 204. Power is first turned on and then the control panel is operated to start the transmission motor 203, which drives the stirring rod 205 to rotate through the transmission gear 204. The stirring rod 205 and the transmission gear 204 are driven by meshing. The top of the stirring rod 205 is fixedly connected to a cutting blade 207, and the cutting blade 207 is inclined. The stirring rod 205 drives the cutting blade 207 to rotate and crush the nano silver particle waste liquid in the feed port 201, so as to reduce the molecular weight of the nano silver particle waste liquid. A buffer ring 206 is arranged at the connection between the stirring rod 205 and the bottom end of the feed port 201.

[0049] like Figure 1 As shown: a blowing fan 4 is installed on the other side of the freeze-drying chamber 1, and the blowing fan 4 is used to disperse the nano silver particle powder to prevent the nano silver particle powder from condensing. There are many reasons for the agglomeration of nano silver particle powder, and excessive water content and viscosity between molecules are certain factors. The blowing fan 4 can disperse the powder to a certain extent, which is convenient for water evaporation, thereby obtaining a purer silver substance;

[0050] like Figure 2 As shown: a discharging assembly 5 is installed on the side of the blowing fan 4 away from the freeze-drying chamber 1. The discharging assembly 5 is used to assist the discharging. The dried powdered silver substance is solid, and its fluidity is not as good as that of the liquid nanosilver particle waste liquid. In addition to using gravity to discharge it, it also requires external intervention. Shaking and vibrating can make the powdered solid silver substance discharge faster.

[0051] The discharging assembly 5 includes a movable discharging port 502, and the movable discharging port 502 is arranged at the outlet of the blowing fan 4. The beneficial effect of the discharging assembly 5 is that the movable discharging port 502 is shaken to make the powdered solid silver material discharge more quickly;

[0052] A side pad 7 is installed between the bottom end of the discharge assembly 5 and the work surface; the side pad 7 is in an inclined shape with different heights on both sides, and the height difference on both sides of the side pad 7 makes the solid silver material automatically flow to the side away from the outlet of the movable discharge port 502 due to gravity, and the height of the side pad 7 close to the blowing fan 4 is higher than the height of the side pad 7 close to the anti-dust assembly 6. Three groups of buffers 8 are installed on the top of the side pad 7. The function of the buffer 8 is to buffer the pressure during material discharge and play a role in suppressing the solid silver material powder from being lifted up, and the top of the buffer 8 is fixed to the guide trough 508;

[0053] The discharge place of the blowing fan 4 is equipped with a fixed discharge port 501, and the fixed discharge port 501 is sleeved on the outside of the movable discharge port 502. The movable discharge port 502 is provided with two groups. The top of the fixed discharge port 501 is equipped with a rotating motor 506, and the output end of the rotating motor 506 is connected to the top of the movable discharge port 502 through the second hinge rod 505. The control panel 3 starts the rotating motor 506 to drive the movable discharge ports 502 on both sides of the fixed discharge port 501 to move forward and backward, so that the powdered nano silver particle waste can be discharged more quickly.

[0054] A feed trough 508 is provided at one end of the fixed discharge port 501 away from the blowing fan 4, and two groups of feed troughs 504 are provided inside the feed trough 508. After discharge, the materials are confined inside the feed trough 504, and the feed trough 504 is provided at the bottom end of the movable discharge port 502. One end of the movable discharge port 502 away from the fixed discharge port 501 is hinged to the feed trough 508 through a first hinge rod 503, and one end of the feed trough 508 away from the anti-dust assembly 6 is provided with an anti-backflow roller 507;

[0055] like Figure 5 As shown: an anti-dust component 6, an end of the discharge component 5 away from the blowing fan 4 is provided with an anti-dust component 6, and the anti-dust component 6 is used to assist the material to be discharged from the discharge hole 9, and the anti-dust component 6 can control the nano silver particles after drying, and the anti-dust component 6 includes a powder pressing plate 604, and the powder pressing plate 604 is arranged at the top of the outlet of the discharge component 5;

[0056] The anti-dust component 6 also includes a support frame 601, and the bottom end of the support frame 601 is fixed to the work table. A first screw lift 602 is installed at one end of the support frame 601 close to the discharge component 5, and a second screw lift 603 is installed at the output end of the first screw lift 602. The operation control panel 3 controls the movement of the first screw lift 602 and the second screw lift 603. The second screw lift 603 moves up and down to drive the powder pressing plate 604 to press down and drive the airflow in the air, blowing the processed nano silver particle waste out of the discharge hole 9. The output end of the second screw lift 603 is fixed to the powder pressing plate 604, and the powder pressing plate 604 is provided with two groups, and the two groups of powder pressing plates 604 are connected by parallel rods 605.

[0057] If the degree of the initial grinding of the raw material does not meet the requirements, the nano silver particles can be led out from the discharge hole 9 and then put in again from the feed assembly 2, and the waste nano silver particles that have been dried once can be broken again. At this time, the frozen nano silver particle waste liquid is converted into nano silver particle waste. The frozen nano silver particles have increased brittleness and are easier to crush; the pre-freezing process is not only to protect the main properties of the material unchanged, but also to ensure that the product has a reasonable structure after freezing to facilitate the sublimation of water; multiple equalization operations make the molecular weight of the obtained nano silver particles more uniform;

[0058] Through the freeze-drying technology used in the freeze-drying chamber, the entire drying of the nanosilver particle waste liquid is carried out at a lower temperature. The freeze-drying technology of the freeze-drying chamber has many advantages, such as maintaining the properties, structure and composition of the substance, reducing the denaturation of the substance, and increasing the dissolution rate of the substance, so that the purification treatment effect of the nanosilver particle waste liquid is better.

[0059] A method for recovering and treating waste liquid of nano silver particles comprises the following steps:

[0060] S1 Recovers waste liquid of nanosilver particles from pharmaceutical, textile, detergent and children's toy products;

[0061] S2: the waste liquid of nano-silver particles is put into the feeding assembly 2 in the waste liquid of nano-silver particles recycling and processing device, the power is turned on first, and then the control panel 3 is operated to start the transmission motor 203 and drive the stirring rod 205 to rotate through the transmission gear 204, and the stirring rod 205 drives the cutting blade 207 to rotate and crush the waste liquid of nano-silver particles in the feeding port 201, so as to reduce the molecular weight of the waste liquid of nano-silver particles. When the effect of preliminary crushing is achieved, it is convenient to open the discharge trough 202, so that the waste liquid of nano-silver particles falls into the freeze-drying chamber 1;

[0062] S3 controls the control panel 3 and the temperature control board 10 so that the nanosilver particle waste liquid undergoes a freezing process inside the freeze-drying chamber 1, specifically by utilizing the three-phase change of water; firstly, the nanosilver particle waste liquid containing a large amount of water is cooled and frozen into a solid in advance, and then the solid water is directly sublimated into a gaseous state under vacuum conditions, while the nanosilver particles themselves remain in the ice shelf during freezing, so that their volume remains unchanged after drying, because the solid water absorbs heat during sublimation, causing the temperature of the product itself to drop and slowing down the sublimation speed. In order to increase the sublimation speed and shorten the drying time, the nanosilver particle waste is appropriately heated at the same time;

[0063] S4 After preliminary drying in the freeze-drying chamber 1, the nano silver particles are introduced into the blowing fan 4, and the powder is blown away by the blowing fan 4 to prevent the powder from agglomerating and facilitate the evaporation of water;

[0064] S5 After passing through the blowing fan 4, the nano silver particles continue to fall due to gravity. The buffer 8 buffers the falling force during material discharge to suppress the powder after drying from being lifted up. The control panel 3 starts the rotating motor 506 to drive the movable material discharge ports 502 on both sides of the fixed material discharge port 501 to move forward and backward, so that the powdered nano silver particle waste material can be discharged more quickly. After the material is discharged, the material is restricted in the inside of the guide trough 504. Due to the height difference on both sides of the side pad 7, the powder automatically flows to the side away from the outlet of the movable material discharge port 502.

[0065] S6: operate the control panel 3 to control the movement of the first screw lift 602 and the second screw lift 603; the second screw lift 603 moves up and down to drive the powder pressing plate 604 to press down and drive the airflow in the air, so as to blow the processed nano silver particle waste out of the discharge hole 9.

[0066] Working principle: First, recover the nanosilver particle waste liquid from medicine, textiles, detergents and children's toys, put the nanosilver particle waste liquid into the feeding component 2 in the nanosilver particle waste liquid recovery and treatment device, first turn on the power and then operate the control panel 3 to start the transmission motor 203 to drive the stirring rod 205 to rotate through the transmission gear 204, and the stirring rod 205 drives the cutting blade 207 to rotate and crush the nanosilver particle waste liquid in the feeding port 201, so as to reduce the molecular weight of the nanosilver particle waste liquid. When the initial crushing effect is achieved, it is convenient to open the discharge trough 202 so that the nanosilver particle waste liquid falls into the freeze-drying chamber 1.

[0067] Then, the control panel 3 and the temperature control plate 10 are controlled so that the nanosilver particle waste liquid undergoes a freezing process inside the freeze-drying chamber 1, specifically by utilizing the three-phase change of water; the nanosilver particle waste liquid containing a large amount of water is first cooled and frozen into a solid in advance, and then the solid water is directly sublimated into a gas under vacuum conditions, while the nanosilver particles themselves remain in the ice shelf during freezing, so their volume remains unchanged after drying, because solid water absorbs heat during sublimation, causing the temperature of the product itself to drop and slowing down the sublimation speed. In order to increase the sublimation speed and shorten the drying time, the nanosilver particle waste is appropriately heated at the same time.

[0068] After preliminary drying in the freeze-drying chamber 1, the nano silver particles are introduced into the blowing fan 4, and the powder is blown away by the blowing fan 4 to prevent the powder from agglomerating and facilitate water evaporation. After passing through the blowing fan 4, the nano silver particles continue to fall due to gravity. The buffer 8 buffers the falling force during material discharge to suppress the powder after drying from being lifted up. The control panel 3 starts the rotating motor 506 to drive the movable discharge ports 502 on both sides of the fixed discharge port 501 to move forward and backward, so that the powdered nano silver particle waste can be discharged more quickly. After discharge, the material is limited to the inside of the guide trough 504. Due to the height difference on both sides of the side pad 7, the powder automatically flows to the side away from the outlet of the movable discharge port 502.

[0069] Finally, the control panel 3 is operated to control the first screw lift 602 and the second screw lift 603 to move. The second screw lift 603 moves up and down to drive the powder pressing plate 604 to press down and drive the airflow in the air to blow the processed nano silver particle waste out of the discharge hole 9.

[0070] If the degree of the initial grinding of the raw material is not high at this time, it can be led out from the discharge hole 9 and then put into the feed assembly 2 again to break the nano silver particle waste that has been dried once again. At this time, the frozen nano silver particle waste liquid is converted into nano silver particle waste. The frozen nano silver particles have increased brittleness and are easier to crush; the pre-freezing process is not only to protect the main properties of the material unchanged, but also to have a reasonable structure of the frozen product to facilitate the sublimation of water; multiple equalization operations make the molecular weight of the obtained nano silver particles more uniform, and the freeze drying technology used in the freeze drying chamber makes the entire drying of the nano silver particle waste liquid be carried out at a lower temperature. The freeze drying technology of the freeze drying chamber has many advantages, such as maintaining the properties, structure and composition of the material, reducing the denaturation of the material, and increasing the dissolution rate of the material, so that the purification treatment effect of the nano silver particle waste liquid is better.

[0071] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A nanosilver particle waste liquid recovery and treatment device and recovery method, comprising a freeze drying chamber (1), a control panel (3) is installed on one side of the freeze drying chamber (1), and the freeze drying chamber (1) is capable of freezing the nanosilver particle waste liquid, characterized in that: A feed component (2), the feed component (2) being installed at the top of one side of the freeze-drying chamber (1), the feed component (2) being capable of crushing and stirring the nano silver particle waste liquid multiple times, and the feed component (2) comprising a cutting blade (207), the cutting blade (207) being arranged at the top of one side of the freeze-drying chamber (1); A discharge assembly (5), wherein a blowing fan (4) is installed on the other side of the freeze-drying bin (1), and a discharge assembly (5) is installed on the side of the blowing fan (4) away from the freeze-drying bin (1), wherein the discharge assembly (5) comprises a movable discharge port (502), and the movable discharge port (502) is arranged at the outlet of the blowing fan (4), and a side pad (7) is installed between the bottom end of the discharge assembly (5) and the work surface; An anti-dust component (6) is provided at one end of the discharging component (5) away from the blowing fan (4), the anti-dust component (6) is capable of controlling the nano silver particles after drying, and the anti-dust component (6) includes a powder pressing plate (604), and the powder pressing plate (604) is provided at the top end of the outlet of the discharging component (5).

2. The nano silver particle waste liquid recovery and treatment device according to claim 1, characterized in that: The feed assembly (2) further comprises a feed port (201), the bottom end of the feed port (201) being fixed to the freeze-drying chamber (1) and internally connected, and the bottom of the feed port (201) presents a shape with a convex middle and a concave edge.

3. The nano silver particle waste liquid recovery and treatment device according to claim 2, characterized in that: A discharge chute (202) is provided in the recessed area at the bottom of the feed inlet (201), and a control panel (3) is provided at one end of the feed inlet (201), and the discharge chute (202) is controlled by the control panel (3).

4. The nano silver particle waste liquid recovery and treatment device according to claim 2, characterized in that: A transmission motor (203) is installed at the bottom end of the feed inlet (201), and the output end of the transmission motor (203) is connected to a transmission gear (204). A stirring rod (205) is provided on one side of the transmission gear (204), and the stirring rod (205) and the transmission gear (204) are driven by meshing. The top end of the stirring rod (205) is fixedly connected to a cutting blade (207), and the cutting blade (207) is in an inclined shape. A buffer ring (206) is provided at the connection between the stirring rod (205) and the bottom end of the feed inlet (201).

5. The nano silver particle waste liquid recovery and treatment device according to claim 1, characterized in that: One side of the freeze-drying chamber (1) is equipped with a temperature control plate (10) capable of controlling the internal temperature of the freeze-drying chamber (1).

6. The nano silver particle waste liquid recovery and treatment device according to claim 1, characterized in that: The discharge port of the blowing fan (4) is equipped with a fixed discharge port (501), and the fixed discharge port (501) is sleeved on the outside of the movable discharge port (502). The movable discharge port (502) is provided with two groups. The top of the fixed discharge port (501) is equipped with a rotating motor (506), and the output end of the rotating motor (506) is connected to the top of the movable discharge port (502) through a second hinge rod (505).

7. The nano silver particle waste liquid recovery and treatment device according to claim 6, characterized in that: The fixed discharge port (501) is provided with a material introduction trough (508) at one end away from the blowing fan (4), and two groups of material introduction troughs (504) are provided inside the material introduction trough (508), and the material introduction trough (504) is provided at the bottom end of the movable discharge port (502), and the end of the movable discharge port (502) away from the fixed discharge port (501) is hinged to the material introduction trough (508) through a first hinge rod (503), and the end of the material introduction trough (508) away from the anti-dust assembly (6) is provided with an anti-backflow roller (507).

8. The nano silver particle waste liquid recovery and treatment device according to claim 7, characterized in that: The side pad (7) is in an inclined shape with different heights on both sides, and the height of the side pad (7) close to the blowing fan (4) is higher than the height of the side pad (7) close to the anti-dust assembly (6). Three groups of buffers (8) are installed at the top of the side pad (7), and the top of the buffer (8) is fixed to the material guide trough (508).

9. The nanosilver particle waste liquid recovery and treatment device according to claim 1, characterized in that: The anti-dust assembly (6) also includes a support frame (601), and the bottom end of the support frame (601) is fixed to the work surface, and a first screw lift (602) is installed at one end of the support frame (601) close to the discharge assembly (5), and a second screw lift (603) is installed at the output end of the first screw lift (602), and the output end of the second screw lift (603) is fixed to a powder pressing plate (604), and the powder pressing plates (604) are provided with two groups, and the two groups of powder pressing plates (604) are connected by parallel rods (605).

10. A method for recovering waste liquid of nano-silver particles, comprising a nano-silver particle waste liquid recovery and treatment device as claimed in any one of claims 1 to 9, characterized in that , including the following steps: S1 Recovers waste liquid of nanosilver particles from pharmaceutical, textile, detergent and children's toy products; S2: the nano silver particle waste liquid is put into the feeding assembly (2) in the nano silver particle waste liquid recovery and treatment device, the power is first turned on and then the control panel (3) is operated to start the transmission motor (203) to drive the stirring rod (205) to rotate through the transmission gear (204), and the stirring rod (205) drives the cutting blade (207) to rotate and crush the nano silver particle waste liquid in the feeding port (201), so as to reduce the molecular weight of the nano silver particle waste liquid. When the effect of preliminary crushing is achieved, it is convenient to open the discharge trough (202) so that the nano silver particle waste liquid falls into the freeze drying chamber (1); S3 controls the control panel (3) and the temperature control board (10) so that the nanosilver particle waste liquid undergoes a freezing process inside the freeze-drying chamber (1), specifically by utilizing the three-phase change of water; firstly, the nanosilver particle waste liquid containing a large amount of water is cooled and frozen into a solid in advance, and then the solid water is directly sublimated into a gaseous state under vacuum conditions, while the nanosilver particles themselves remain in the ice shelf during freezing, so that their volume remains unchanged after drying, because the solid water absorbs heat during sublimation, causing the temperature of the product itself to drop and slowing down the sublimation speed. In order to increase the sublimation speed and shorten the drying time, the nanosilver particle waste is appropriately heated at the same time; S4 After preliminary drying in the freeze drying chamber (1), the nano silver particles are introduced into the blowing fan (4), and the powder is blown away by the blowing fan (4) to prevent the powder from agglomerating and facilitate the evaporation of water; After passing through the blowing fan (4), the S5 nano-silver particles continue to fall due to gravity. The buffer (8) buffers the falling force during material discharge to suppress the powder after drying from being lifted up. The control panel (3) starts the rotating motor (506) to drive the movable material discharge ports (502) on both sides of the fixed material discharge port (501) to move forward and backward, so that the powdered nano-silver particle waste material can be discharged more quickly. After the material is discharged, the material is restricted inside the guide trough (504). Due to the height difference on both sides of the side pad (7), the powder automatically flows to the side away from the outlet of the movable material discharge port (502); S6 operates the control panel (3) to control the movement of the first screw lift (602) and the second screw lift (603). The second screw lift (603) moves up and down to drive the powder pressing plate (604) to press down and drive the air flow in the air, thereby blowing the processed nano silver particle waste out of the discharge hole (9).

Images