A silver-containing wastewater treatment device

Abstract

The invention discloses a silver-containing wastewater treatment equipment, comprising a negative pressure pump, an air inlet of the negative pressure pump is connected to the inner cavity of a negative pressure container, a conductive annular shell and a conductive arc plate are arranged in the negative pressure container, a horizontally arranged and rotating inner tube is arranged in the negative pressure container, an evaporation belt is arranged on the inner tube, the evaporation belt is located in the conductive annular shell, and an annular cover is extended inwardly at both ends of the conductive annular shell, an inlet pipe is installed on the negative pressure container, one end of the inlet pipe located in the negative pressure container is connected to the inner cavity of the inner tube through a rotary joint, a plurality of spray holes are opened at the inner tube corresponding to the evaporation belt or a plurality of nozzles are installed, an insulating partition is installed on the inner side of the conductive arc plate, and the insulating partition, the conductive arc plate and the conductive annular shell form a tortuous liquid flow path. The silver-containing wastewater treatment equipment first concentrates the silver-containing wastewater with low energy consumption, and then performs electrolysis, thereby reducing the volume of the wastewater and shortening the silver recovery time.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater treatment, in particular to a silver-containing wastewater treatment device. Background Art

[0002] Radiographic flaw detection technology can record the test results directly on the film. It is a detection method with true records and good traceability. It can detect defects such as cracks, cavitation, pinholes, segregation, and doping in materials.

[0003] The film needs to be washed to remove the unexposed photosensitizer, which will produce wastewater containing silver ions. The recovery of silver ions in the wastewater can achieve the recovery and reuse of silver, reduce environmental pollution, and save silver resources. The recovery of silver in wastewater mainly has the following directions:

[0004] Chemical precipitation method: by adding chemical agents, the silver ions in the wastewater are precipitated into solids, thereby realizing the recovery of silver. However, the residual agents in the wastewater will cause secondary pollution to the environment.

[0005] Electrochemical method: This method uses direct current electrolysis equipment to reduce silver ions in wastewater into metallic silver, thereby achieving silver recovery. However, this method produces a large amount of wastewater and takes a long time to recover. Summary of the invention

[0006] The technical problem to be solved by the present invention is to overcome the existing defects and provide a silver-containing wastewater treatment device, which first concentrates the silver-containing wastewater with low energy consumption and then electrolyzes it, thereby reducing the volume of the wastewater and shortening the silver recovery time, and can effectively solve the problems in the background technology.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a silver-containing wastewater treatment device, comprising a negative pressure pump and a negative pressure container, wherein the air inlet of the negative pressure pump is connected to the inner cavity of the negative pressure container, and the negative pressure container is provided with a conductive annular shell and a conductive arc plate located below the conductive annular shell.

[0008] A horizontally arranged and rotating inner tube is provided in the negative pressure container, an evaporation belt is provided on the inner tube, the evaporation belt is located in a conductive annular shell, and annular covers are extended inwardly at both ends of the conductive annular shell, an inside and outside liquid inlet pipe is installed on the negative pressure container, one end of the liquid inlet pipe located in the negative pressure container is connected to the inner cavity of the inner tube through a rotating joint, and a plurality of spray holes are opened or a plurality of nozzles are installed at the inner tube corresponding to the evaporation belt.

[0009] A plurality of insulating partitions are installed on the inner side of the arc of the conductive arc plate, and the insulating partitions, the conductive arc plate and the conductive annular shell form a tortuous liquid flow path. The conductive annular shell is provided with a plurality of annular liquid permeable holes at a position corresponding to one end of the liquid flow path. The position of the liquid flow path away from the liquid permeable holes is connected to one end of the conduit, and the other end of the conduit passes through and extends to the outside of the negative pressure container.

[0010] The portion of the liquid inlet pipe located outside the negative pressure container one is installed with a valve one, and the portion of the conduit located outside the negative pressure container one is installed with a valve two.

[0011] The negative pressure container 1 is provided with a driving assembly for driving the inner tube to rotate.

[0012] The negative pressure container is provided with an electrolytic DC power supply device for supplying power to the conductive annular shell and the conductive arc plate.

[0013] As a preferred technical solution of the present invention, the drive assembly includes a cylindrical shell with an opening at one end, a sealed sliding piston is provided in the cylindrical shell, the outer side of the piston is connected to one end of a pressure rod, the other end of the pressure rod extends out of the opening of the cylindrical shell, a coaxial one-way bearing is installed on the inner tube, the outer ring of the one-way bearing is in contact with the side of the pressure rod, and a limit block is provided on the bottom side of the inner cavity of the cylindrical shell.

[0014] When the air pressure inside and outside the negative pressure container is equal, the inner side of the piston slides toward the inner cavity of the cylinder shell and there is a gap between the inner side of the piston and the cylinder shell.

[0015] As a preferred technical solution of the present invention, a threaded hole connecting the inside and the outside of the cylinder shell is opened on the bottom side of the inner cavity, and a bolt is installed on the threaded hole.

[0016] As a preferred technical solution of the present invention, it also includes a shell and a push switch that is pressed to close, a first magnet is fixed to the bottom side of the inner cavity of the shell, a second magnet is installed in the inner cavity of the shell for sealing and sliding, a through hole is opened in the shell at a position away from the first magnet, a push switch is installed at the position of the first magnet corresponding to the second magnet, and the push switch and the negative pressure pump are connected in series.

[0017] When the air pressure inside and outside the negative pressure container 1 is equal, the second magnet presses the push switch to put the push switch into a conducting state.

[0018] As a preferred technical solution of the present invention, it also includes a scraping member installed on an inner wall of the negative pressure container, wherein the scraping member is a scraper, and the blade of the scraper is attached to the outer side of the conductive annular shell.

[0019] As a preferred technical solution of the present invention, an inner wall of the negative pressure container and the side surface of the scraper are connected by an elastic rod.

[0020] As a preferred technical solution of the present invention, the conductive annular shell includes a cylindrical inner support layer, annular covers extend inward at both ends of the inner support layer, an elastic cushion layer is provided on the outside of the inner support layer, a soft metal layer is provided on the outside of the elastic cushion layer, and a rotating rod is installed in the negative pressure container, and the rotating rod presses the soft metal layer toward the inner support layer.

[0021] As a preferred technical solution of the present invention, the evaporation belt comprises a breathable support pad, a liquid adsorption pad is provided on one side of the breathable support pad, and an electric heating component is installed on the liquid adsorption pad.

[0022] As a preferred technical solution of the present invention, the negative pressure container 1 is made of a transparent material or an observation window is installed on the negative pressure container 1.

[0023] As a preferred technical solution of the present invention, one end of the conduit located outside the negative pressure container one is connected to the inner cavity of the negative pressure container two, and the height of the negative pressure container two is lower than the height of the insulating partition.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. In the silver-containing wastewater treatment equipment exemplified by the present invention, a negative pressure pump extracts air from a negative pressure container to reduce the air pressure in the negative pressure container. On the one hand, the silver-containing wastewater soaks the evaporation zone, thereby increasing the evaporation area of ​​the silver-containing wastewater, and the boiling point of the silver-containing wastewater in the negative pressure container is reduced, thereby reducing the energy required for the evaporation of the silver-containing wastewater. The water in the silver-containing wastewater evaporates to achieve the concentration of the silver-containing wastewater, thereby improving the electrolysis efficiency and reducing the energy consumption; on the other hand, the evaporation of the water content of the silver-containing wastewater in the negative pressure container causes the air pressure in the negative pressure container to fluctuate and drives the inner tube to rotate unidirectionally, so that the silver-containing wastewater flowing from the inner tube to the evaporation zone is evenly distributed, thereby increasing the evaporation rate of the water content in the silver-containing wastewater; on the other hand, when the silver-containing wastewater is electrolyzed to completely recover the silver and then continue to electrolyze the wastewater, the cathode of the electrolysis will produce hydrogen bubbles, which will expand in volume under the negative pressure environment compared with the standard air pressure and are easy to be observed, making it convenient to determine the degree of electrolysis of the silver-containing wastewater.

[0026] 2. The silver-containing wastewater treatment equipment of the present invention is used to adjust the distance between the inner side of the piston and the bottom side of the inner cavity of the cylinder shell, and then screw the bolt into the threaded hole. The air volume between the inner side of the piston and the bottom side of the inner cavity of the cylinder shell is easy to adjust, and the moving distance of the pressure rod during the air pressure fluctuation in the negative pressure container is easy to adjust, that is, the single rotation angle of the evaporation belt is easy to adjust.

[0027] 3. In the silver-containing wastewater treatment equipment exemplified in the present invention, during the rotation of the conductive annular shell, the rotating rod presses the soft metal layer toward the inner supporting layer. When the silver attached to the soft metal layer passes through the soft metal layer at the deformation position, the adhesion between the attached silver and the soft metal layer becomes smaller, and the attached silver falls off the soft metal layer, thereby achieving the cleaning of the silver attached to the conductive annular shell.

[0028] 4. In the silver-containing wastewater treatment equipment of the example of the present invention, the evaporation of water in the silver-containing wastewater in the negative pressure container causes the air pressure in the negative pressure container to fluctuate. The first magnet, the second magnet and the push switch constitute the start-stop control component of the negative pressure pump, thereby maintaining the negative pressure environment in the negative pressure container. The intermittent start-stop of the negative pressure pump consumes less energy than the long-term start-up of the negative pressure pump, and the fluctuating air pressure in the negative pressure container provides power for the rotation of the conductive annular shell.

[0029] 5. In the silver-containing wastewater treatment equipment exemplified in the present invention, the water content of the silver-containing wastewater in the negative pressure container evaporates, causing the air pressure in the negative pressure container to fluctuate, and the air in the gap between the inner side of the piston and the bottom side of the inner cavity of the cylinder shell expands or compresses periodically. The periodically expanded or compressed air drives the inner tube to rotate in one direction through the piston, the pressure rod and the one-way bearing, so that the silver-containing wastewater flowing from the inner tube to the evaporation zone is evenly distributed, thereby increasing the evaporation rate of the water content in the silver-containing wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of one viewing angle of the present invention;

[0031] Figure 2 It is a partial cross-sectional structural schematic diagram of the present invention;

[0032] Figure 3 for Figure 2 A schematic diagram of the structure at A;

[0033] Figure 4 for Figure 2 A schematic diagram of the structure at B;

[0034] Figure 5 It is a schematic diagram of the structure of the conductive annular housing and the conductive arc plate of the present invention;

[0035] Figure 6 It is a schematic diagram of the liquid flow channel structure of the present invention;

[0036] Figure 7 It is a schematic diagram of the conductive annular housing structure of the present invention;

[0037] Figure 8 It is a schematic diagram of the evaporation zone structure of the present invention.

[0038] In the figure: 1 negative pressure pump, 2 negative pressure container 1, 3 valve 1, 4 valve 2, 5 negative pressure container 2, 6 conductive annular shell, 61 soft metal layer, 62 elastic cushion layer, 63 inner support layer, 7 evaporation belt, 71 breathable support pad, 72 electric heating component, 73 liquid adsorption pad, 8 scraper, 9 inner tube, 10 conductive arc plate, 11 push switch, 12 first magnet, 13 second magnet, 14 shell, 15 one-way bearing, 16 pressure rod, 17 cylinder shell, 18 piston, 19 limit block, 20 rotary joint, 21 liquid permeable hole, 22 insulating partition, 23 catheter, 24 rotating rod. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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.

[0040] Embodiment 1:

[0041] See also Figure 1-6 The present embodiment discloses a silver-containing wastewater treatment device, comprising a negative pressure pump 1 and a negative pressure container 2, wherein the air inlet of the negative pressure pump 1 is connected to the inner cavity of the negative pressure container 2, the negative pressure pump 1 extracts air from the negative pressure container 2 to reduce the air pressure in the negative pressure container 2, and a conductive annular shell 6 and a conductive arc plate 10 located below the conductive annular shell 6 are provided in the negative pressure container 2.

[0042] A rotating inner tube 9 is installed in the negative pressure container 2 through a bearing or a rotating pin, and an evaporation belt 7 is arranged on the inner tube 9. The evaporation belt 7 is located in the conductive annular shell 6, and an annular cover is extended inward at both ends of the conductive annular shell 6. A liquid inlet pipe that penetrates inside and outside is installed on the negative pressure container 2. One end of the liquid inlet pipe located in the negative pressure container 2 is connected to the inner cavity of the inner tube 9 through a rotating joint 20. The inner tube 9 is provided with a plurality of spray holes or a plurality of nozzles at the position corresponding to the evaporation belt 7. After the air pressure in the negative pressure container 2 is reduced, the silver-containing wastewater is arranged on the evaporation belt 7 through the liquid inlet pipe and the inner tube 9 under the action of the air pressure difference between the inside and outside of the negative pressure container 2. The silver-containing wastewater on the evaporation belt 7 flows downward to soak the evaporation belt 7, and the silver-containing wastewater falls on the inner wall of the conductive annular shell 6. The annular cover causes the silver-containing wastewater to gather at the bottom of the inner wall of the silver-containing wastewater.

[0043] Specific as Figure 5 and Figure 6As shown, a plurality of fan-shaped insulating partitions 22 are installed on the inner side of the arc of the conductive arc plate 10, and the inner side of the insulating partition 22 is in sliding contact with the outer side of the conductive annular shell 6. The insulating partition 22, the inner side of the arc of the conductive arc plate 10 and the outer peripheral side of the conductive annular shell 6 form a tortuous liquid flow path. The conductive annular shell 6 is provided with a plurality of annular liquid permeable holes 21 at the position corresponding to one end of the liquid flow path. The position of the liquid flow path away from the liquid permeable holes 21 is connected to one end of a conduit 23, and the other end of the conduit 23 passes through and extends to the outside of the negative pressure container 2.

[0044] A valve 3 is installed on the portion of the liquid inlet pipe located outside the negative pressure container 2, and a valve 2 4 is installed on the portion of the conduit 23 located outside the negative pressure container 2.

[0045] A driving assembly for driving the inner tube 9 to rotate is arranged in the negative pressure container 1 2 .

[0046] Preferably, the negative pressure container 2 is provided with an electrolysis DC power supply device for supplying power to the conductive annular shell 6 and the conductive arc plate 10, wherein the conductive annular shell 6 is the cathode and the conductive arc plate 10 is the anode.

[0047] Preferably, the evaporation belt 7 is wound on the inner tube 9, and the driving component is an electric motor or a hydraulic motor installed in the negative pressure container 2.

[0048] Preferably, a connecting bracket for connecting the conductive annular shell 6 and the evaporation belt 7 is installed on the inner tube 9 .

[0049] The working process and principle of this embodiment are:

[0050] The negative pressure pump 1 draws air from the negative pressure container 2 to reduce the air pressure in the negative pressure container 2, and the driving component drives the conductive annular shell 6 and the evaporation belt 7 to rotate through the inner tube 9. Under the action of the pressure difference between the inside and outside of the negative pressure container 2, the silver-containing wastewater flows to the evaporation belt 7 through the liquid inlet pipe, the inner tube 9 and the nozzle. The silver-containing wastewater on the evaporation belt 7 flows downward and soaks the evaporation belt 7, and the silver-containing wastewater falls on the inner wall of the conductive annular shell 6. The annular cover causes the silver-containing wastewater to gather at the bottom of the inner wall of the silver-containing wastewater and the silver-containing wastewater flows into the liquid flow channel through the liquid permeable hole 21. The air pressure in the negative pressure container 2 is reduced, which reduces the boiling point of the silver-containing wastewater. The evaporation belt 7 increases the evaporation area of ​​the silver-containing wastewater. The water in the silver-containing wastewater evaporates to achieve the concentration of the silver-containing wastewater, thereby improving the electrolysis efficiency.

[0051] The concentrated silver-containing wastewater that flows to the inner wall of the conductive annular shell 6 falls into one end of the liquid flow channel through the liquid permeable hole 21, and the silver-containing wastewater flows along the liquid flow channel and then flows out through the conduit 23. During the silver-containing wastewater flowing through the liquid flow channel, the electrolytic DC power supply equipment electrolytically separates silver through the conductive annular shell 6 and the conductive arc plate 10, and the silver adheres to the conductive annular shell 6, thereby realizing the recovery of silver in the silver-containing wastewater.

[0052] The flow rate of the silver-containing wastewater entering the negative pressure container 2 is adjusted by adjusting the opening of the valve 3.

[0053] Preferably, a conductive slip ring is installed on the inner tube 9, and the conductive slip ring electrically connects the conductive annular shell 6 and the electrolysis DC power supply equipment.

[0054] Preferably, the silver-containing wastewater entering the negative pressure container 2 is heated in advance, and the temperature of the silver-containing wastewater when entering the negative pressure container 2 exceeds the boiling point of water after the air pressure in the negative pressure container 2 is reduced.

[0055] Preferably, the conductive annular shell 6 is made of stainless steel, graphite or titanium, and the conductive arc plate 10 is made of metal, graphite plate or conductive rubber.

[0056] Embodiment 2:

[0057] like Figure 2 and Figure 4 As shown, this embodiment discloses a silver-containing wastewater treatment device, and its structure is roughly the same as that of the first embodiment, except that the driving assembly of this embodiment includes a cylindrical shell 17 with an opening at one end, and a sealed sliding piston 18 is arranged in the cylindrical shell 17. The outer side of the piston 18 is connected to one end of a pressure rod 16, and the other end of the pressure rod 16 extends out of the opening of the cylindrical shell 17. A coaxial one-way bearing 15 is installed on the inner tube 9, and the outer ring of the one-way bearing 15 is fitted with the side of the pressure rod 16. The friction between the pressure rod 16 and the outer ring of the one-way bearing 15 can drive the inner tube 9 to rotate in one direction, and the inner ring of the one-way bearing 15 is fixed on the inner tube 9.

[0058] When the air pressure inside and outside the negative pressure container 2 is equal, the inner side of the piston 18 slides toward the inner cavity of the cylinder shell 17 and there is a gap between the inner side of the piston 18 and the cylinder shell 17.

[0059] Preferably, the negative pressure pump 1 is provided with a pressure gauge or the negative pressure container 2 is provided with an air pressure detection device to facilitate monitoring of the air pressure in the negative pressure container 2.

[0060] In this embodiment, the one-way bearing 15 is an existing bearing that can rotate freely in one direction and is locked in the other direction. It is commonly used in textile machinery, printing machinery, automobile industry, and household appliances. Preferably, the pressure rod 16 and the outer ring of the one-way bearing 15 are both provided with teeth.

[0061] The working process and principle of this embodiment are:

[0062] The negative pressure pump 1 stops working after pumping the negative pressure container 2 to the lower limit of the set air pressure range, and the water content of the silver-containing wastewater adhering to the evaporation belt 7 evaporates to increase the air pressure in the negative pressure container 2. When the air pressure in the negative pressure container 2 rises to the upper limit of the set air pressure range, the negative pressure pump 1 pumps the air pressure in the negative pressure container 2 to the lower limit of the set air pressure range.

[0063] As the water content of the silver-containing wastewater in the negative pressure container 2 evaporates and is extracted, the air pressure in the negative pressure container 2 fluctuates, and the air in the gap between the inner side of the piston 18 and the bottom side of the inner cavity of the cylinder shell 17 expands or compresses periodically. The periodically expanded or compressed air drives the inner tube 9 to rotate in one direction through the piston 18, the pressure rod 16 and the one-way bearing 15, so that the silver-containing wastewater flowing from the inner tube 9 to the evaporation zone 7 is evenly distributed, thereby improving the evaporation rate of the water content in the silver-containing wastewater.

[0064] A limit block 19 is provided at the bottom of the inner cavity of the cylinder shell 17 to prevent the inner side of the piston 18 from fitting against the bottom of the inner cavity of the cylinder shell 17, thereby ensuring that there is air between the inner side of the piston 18 and the bottom of the inner cavity of the cylinder shell 17. The pressure difference between the inside and outside of the piston 18 can push the piston 18 to move.

[0065] Embodiment three:

[0066] like Figure 4 As shown, this embodiment discloses a silver-containing wastewater treatment device, and its structure is substantially the same as that of the first embodiment, except that a threaded hole connecting the inside and the outside of the cylinder shell 17 is provided on the bottom side of the inner cavity of the cylinder shell 17 of this embodiment, and a bolt is installed on the threaded hole.

[0067] Under normal pressure, unscrew the bolt from the threaded hole, adjust the distance between the inner side of the piston 18 and the bottom side of the inner cavity of the cylinder shell 17, and then screw the bolt into the threaded hole. The air volume between the inner side of the piston 18 and the bottom side of the inner cavity of the cylinder shell 17 is convenient to adjust, and the moving distance of the pressure rod 16 during the air pressure fluctuation in the negative pressure container 2 is convenient to adjust, that is, the single rotation angle of the evaporation belt 7 is convenient to adjust.

[0068] Embodiment 4:

[0069] like Figure 2 and Figure 3 As shown, this embodiment discloses a silver-containing wastewater treatment device, and its structure is roughly the same as that of the first embodiment, except that this embodiment also includes a shell 14 and a push switch 11 that is pressed closed, a first magnet 12 is fixed to the bottom side of the inner cavity of the shell 14, a sealed and sliding second magnet 13 is installed in the inner cavity of the shell 14, a through hole is opened in the shell 14 away from the first magnet 12, and the push switch 11 is installed at the position of the first magnet 12 corresponding to the second magnet 13, the push switch 11 and the negative pressure pump 1 are connected in series, and the push switch 11 allows air to exist between the first magnet 12 and the second magnet 13.

[0070] When the air pressure inside and outside the negative pressure container 2 is equal, the second magnet 13 presses the push switch 11 to put the push switch 11 into a conducting state.

[0071] Preferably, an elastic rod or a spring is installed on the side of the second magnet 13 away from the first magnet 12 .

[0072] The negative pressure pump 1, the push switch 11 and the electrolytic DC power supply device used in the present invention are all commonly used electronic components in the prior art. Their working methods and circuit structures are well-known technologies and will not be described in detail here.

[0073] The working process and principle of this embodiment are:

[0074] The evaporation of water in the silver-containing wastewater in the negative pressure container 2 causes the air pressure in the negative pressure container 2 to fluctuate. When the negative pressure pump 1 pumps the negative pressure container 2 to a level close to the lower limit of the set air pressure range, the sum of the magnetic attraction between the first magnet 12 and the second magnet 13 and the friction between the second magnet 13 and the shell 14 is less than the air pressure difference inside and outside the second magnet 13. The second magnet 13 slides away from the first magnet 12, and the push switch 11 changes from a pressed closed state to a non-pressed open state, and the negative pressure pump 1 stops working.

[0075] The evaporation of water in the silver-containing wastewater in the negative pressure container 2 increases the air pressure in the negative pressure container 2, and the air pressure in the negative pressure container 2 approaches the upper limit of the set air pressure range. At this time, the magnetic attraction between the first magnet 12 and the second magnet 13 is greater than the sum of the friction between the second magnet 13 and the shell 14 and the air pressure difference inside and outside the second magnet 13. The second magnet 13 slides toward the first magnet 12 and the push switch 11 is pressed. The push switch 11 changes from a non-pressed disconnected state to a pressed closed state. The negative pressure pump 1 works to extract the gas in the negative pressure container 2 so that the air pressure in the negative pressure container 2 approaches the lower limit of the set air pressure range.

[0076] The silver-containing wastewater treatment equipment realizes the maintenance of a negative pressure environment in a negative pressure container 2. The upper limit of the pressure setting range of the air pressure in the negative pressure container 2 is 30-80 kPa, the lower limit of the pressure setting range of the air pressure in the negative pressure container 2 is 20-70 kPa, and the upper limit of the pressure setting range of the air pressure in the negative pressure container 2 is greater than the lower limit of the pressure setting range of the air pressure in the negative pressure container 2.

[0077] Embodiment five:

[0078] like Figure 2 and Figure 5 As shown, this embodiment discloses a silver-containing wastewater treatment equipment, and its structure is roughly the same as that of the first embodiment, except that this embodiment also includes a scraper 8 installed on the inner wall of the negative pressure container 2, and the scraper 8 is a scraper, and the blade of the scraper is attached to the outer side of the conductive annular shell 6. The silver generated by electrolysis accumulates on the conductive annular shell 6. During the rotation of the conductive annular shell 6, the scraper scrapes off the silver attached to the conductive annular shell 6, and the scraped silver falls on the bottom side of the inner cavity of the negative pressure container 2, thereby improving the continuous working time of the silver-containing wastewater treatment equipment and improving the efficiency of the silver-containing wastewater treatment equipment.

[0079] Embodiment six:

[0080] like Figure 5 As shown, this embodiment discloses a silver-containing wastewater treatment device, and its structure is roughly the same as that of the fifth embodiment, except that, in this embodiment, the inner wall of the negative pressure container 2 and the side of the scraper are connected by an elastic rod, and when part of the silver on the conductive annular shell 6 is attached and fixed and difficult to scrape off, this part of the silver drives the elastic rod to bend through the scraper, and the scraper and this part of the silver are staggered to ensure the normal rotation of the conductive annular shell 6.

[0081] Embodiment seven:

[0082] like Figure 7 As shown, this embodiment discloses a silver-containing wastewater treatment equipment, and its structure is roughly the same as that of the first embodiment, except that the conductive annular shell 6 of this embodiment includes a cylindrical inner support layer 63, annular covers are extended inward at both ends of the inner support layer 63, an elastic cushion layer 62 is provided on the outer side of the inner support layer 63, a soft metal layer 61 is provided on the outer side of the elastic cushion layer 62, a rotating rod 24 is installed in the negative pressure container 2 through a bearing or a rotating pin, and the rotating rod 24 presses the soft metal layer 61 toward the inner support layer 63, the soft metal layer 61 is stainless steel precision strip or aluminum sheet, and the elastic cushion layer 62 is made of rubber or silicone.

[0083] The working process and principle of this embodiment are:

[0084] During the rotation of the conductive annular shell 6, the rotating rod 24 presses the soft metal layer 61 toward the inner supporting layer 63. When the silver attached to the soft metal layer 61 passes through the soft metal layer 61 at the deformed position, the adhesion between the attached silver and the soft metal layer 61 becomes smaller, and the attached silver falls off the soft metal layer 61, thereby cleaning the silver attached to the conductive annular shell 6.

[0085] Embodiment eight:

[0086] like Figure 8 As shown, this embodiment discloses a silver-containing wastewater treatment device, and its structure is substantially the same as that of the first embodiment, except that the evaporation belt 7 of this embodiment includes a breathable support pad 71, a liquid adsorption pad 73 is provided on one side of the breathable support pad 71, an electric heating component 72 is installed on the liquid adsorption pad 73, the electric heating component 72 is electrically connected to an external power supply through a conductive slip ring, the electric heating component 72 is an electric heating wire or an electric heating tape, the breathable support pad 71 is a metal wire pad, a plastic wire pad or a blind pipe, the liquid adsorption pad 73 is an absorbent cloth or a sponge, and the breathable support pad 71 isolates adjacent liquid adsorption pads 73 so that both sides of the liquid adsorption pad 73 can evaporate, thereby increasing the evaporation area of ​​the liquid adsorption pad 73.

[0087] Embodiment nine:

[0088] like Figure 1 and Figure 2As shown, this embodiment discloses a silver-containing wastewater treatment device, and its structure is roughly the same as that of the first embodiment, except that the negative pressure container 2 of this embodiment is made of transparent material or an observation window is installed on the negative pressure container 2, which is convenient for observing the recovery of silver ions in the silver-containing wastewater near the position of the conduit 23 in the liquid flow channel.

[0089] When the silver is completely recovered by electrolysis of the silver-containing wastewater and the wastewater is further electrolyzed, hydrogen bubbles will be produced at the cathode of the electrolysis, the air pressure in the negative pressure container 2 is lower than the ambient pressure, and the volume of the hydrogen bubbles increases for easy observation; when bubbles appear in the liquid flow channel near the catheter 23, it indicates that the silver ions in the silver-containing wastewater are completely electrolyzed; when bubbles do not appear in the liquid flow channel near the catheter 23, it indicates that the silver ions in the silver-containing wastewater are not completely electrolyzed.

[0090] When the length of bubbles in the liquid flow channel accounts for a large proportion, increasing the opening of valve 3 will increase the flow rate of the silver-containing wastewater entering the negative pressure container 2 and reduce energy consumption.

[0091] Embodiment ten:

[0092] like Figure 1 As shown, this embodiment discloses a silver-containing wastewater treatment equipment, and its structure is roughly the same as that of the embodiment 1, except that, in this embodiment, one end of the conduit 23 located outside the negative pressure container 2 is connected to the inner cavity of the negative pressure container 25, and the height of the negative pressure container 25 is lower than the height of the insulating partition 22, and the valve 24 is in the open state. The negative pressure container 25 is connected to the negative pressure container 2, which facilitates the electrolyzed wastewater on the conductive arc plate 10 to flow into the negative pressure container 25, and the electrolyzed wastewater flows into the negative pressure container 25 through the conduit 23 and the valve 24. When the negative pressure container 25 needs to be replaced, the valve 24 is closed to replace the new negative pressure container 25 and the new negative pressure container 25 is connected to the conduit 23.

[0093] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A silver-containing wastewater treatment device, characterized in that: It comprises a negative pressure pump (1) and a negative pressure container (2), wherein the air inlet of the negative pressure pump (1) is connected to the inner cavity of the negative pressure container (2), and the negative pressure container (2) is provided with a conductive annular shell (6) and a conductive arc plate (10) located below the conductive annular shell (6); The negative pressure container (2) is provided with a horizontally arranged and rotatable inner tube (9), the negative pressure container (2) is provided with a driving assembly for driving the inner tube (9), the inner tube (9) is provided with an evaporation belt (7), the evaporation belt (7) is located in a conductive annular shell (6), and an annular cover is extended inwardly at both ends of the conductive annular shell (6), the negative pressure container (2) is provided with a liquid inlet pipe penetrating inside and outside, one end of the liquid inlet pipe located in the negative pressure container (2) is connected to the inner cavity of the inner tube (9) through a rotating joint (20), and the inner tube (9) is provided with a plurality of spray holes or a plurality of nozzles corresponding to the evaporation belt (7); A plurality of insulating baffles (22) are installed on the inner side of the arc of the conductive arc plate (10), and the insulating baffles (22), the inner side of the arc of the conductive arc plate (10) and the outer peripheral side of the conductive annular shell (6) form a tortuous liquid flow channel. The conductive annular shell (6) is provided with a plurality of annular liquid permeable holes (21) at positions corresponding to one end of the liquid flow channel. The position of the liquid flow channel away from the liquid permeable holes (21) is connected to one end of a conduit (23), and the other end of the conduit (23) passes through and extends to the outside of the negative pressure container (2); The portion of the liquid inlet pipe located outside the negative pressure container one (2) is installed with a valve one (3), and the portion of the conduit (23) located outside the negative pressure container one (2) is installed with a valve two (4); The negative pressure container (2) is provided with an electrolytic DC power supply device outside for supplying power to the conductive annular shell (6) and the conductive arc plate (10).

2. The silver-containing wastewater treatment equipment according to claim 1, characterized in that: The drive assembly comprises a cylindrical shell (17) with an opening at one end, a sealed sliding piston (18) is arranged in the cylindrical shell (17), the outer side of the piston (18) is connected to one end of a pressure rod (16), the other end of the pressure rod (16) extends out of the opening of the cylindrical shell (17), a coaxial one-way bearing (15) is installed on the inner tube (9), the outer ring of the one-way bearing (15) is in contact with the side of the pressure rod (16), and a limit block (19) is arranged on the bottom side of the inner cavity of the cylindrical shell (17); When the air pressure inside and outside the negative pressure container (2) is equal, the inner side of the piston (18) slides toward the inner cavity of the cylinder shell (17) and a gap exists between the inner side of the piston (18) and the cylinder shell (17).

3. The silver-containing wastewater treatment equipment according to claim 2, characterized in that: A threaded hole communicating with the inside and outside of the cylindrical shell (17) is provided at the bottom side of the inner cavity, and a bolt is installed on the threaded hole.

4. The silver-containing wastewater treatment equipment according to claim 1, characterized in that: It also comprises a shell (14) and a push switch (11) that is closed by being pressed, wherein a first magnet (12) is fixed to the bottom side of the inner cavity of the shell (14), a second magnet (13) is installed in the inner cavity of the shell (14) in a sealed and slidable manner, a through hole connecting the inside and outside of the shell (14) is opened at a position away from the first magnet (12), and a push switch (11) is installed at a position of the first magnet (12) corresponding to the second magnet (13), and the push switch (11) and the negative pressure pump (1) are connected in series; When the air pressure inside and outside the negative pressure container 1 (2) is equal, the second magnet (13) presses the push switch (11) to put the push switch (11) into an on state.

5. The silver-containing wastewater treatment equipment according to claim 1, characterized in that: It also includes a scraping member (8) installed on the inner wall of the negative pressure container (2), wherein the scraping member (8) is a scraper, and the blade of the scraper is attached to the outside of the conductive annular shell (6).

6. The silver-containing wastewater treatment equipment according to claim 5, characterized in that: The inner wall of the negative pressure container 1 (2) and the side surface of the scraper are connected by an elastic rod.

7. The silver-containing wastewater treatment equipment according to claim 1, characterized in that: The conductive annular shell (6) comprises a cylindrical inner support layer (63), annular covers extending inwardly at both ends of the inner support layer (63), an elastic cushion layer (62) is provided on the outer side of the inner support layer (63), a soft metal layer (61) is provided on the outer side of the elastic cushion layer (62), and a rotating rod (24) is installed in the negative pressure container (2), and the rotating rod (24) presses the soft metal layer (61) toward the inner support layer (63).

8. The silver-containing wastewater treatment equipment according to claim 1, characterized in that: The evaporation belt (7) comprises a breathable support pad (71), a liquid absorption pad (73) is provided on one side of the breathable support pad (71), and an electric heating component (72) is installed on the liquid absorption pad (73).

9. The silver-containing wastewater treatment equipment according to claim 1, characterized in that: The negative pressure container 1 (2) is made of a transparent material or an observation window is installed on the negative pressure container 1 (2).

10. The silver-containing wastewater treatment equipment according to claim 1, characterized in that: One end of the conduit (23) located outside the negative pressure container one (2) is connected to the inner cavity of the negative pressure container two (5), and the height of the negative pressure container two (5) is lower than the height of the insulating partition (22).

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