A process for effectively treating silver paste wastewater

Abstract

The invention belongs to the technical field of silver paste wastewater treatment, and provides a process for effectively treating silver paste wastewater, comprising the following steps: step S1: firstly adjusting acidic silver paste wastewater containing high molecular organic matter to neutral; step S2: passing the silver paste wastewater into a water filter tank through a water inlet pipe; step S3: driving a guide rod to move along a wave guide rail on a guide ring when a filter element revolves; step S4: when the filter element revolves, since the filter element also rotates on its own, a cleaning plate scrapes off the black sludge substances thrown out and sprayed out from the surface of the filter element; through the revolution and rotation of the filter element, the centrifugal force generated by the rotation can be used to throw off the black sludge substances attached to the filter element, thereby effectively preventing the black sludge substances from passing through the filter element into a subsequent ultrafiltration membrane system, preventing the black sludge substances from accumulating on the surface of the ultrafiltration membrane, avoiding affecting the normal operation of the ultrafiltration membrane system and the subsequent reverse osmosis membrane system, and effectively preventing the rapid decrease of the system water production flux.

Description

Technical Field

[0001] The invention belongs to the technical field of silver paste wastewater treatment, and in particular relates to a process for effectively treating silver paste wastewater. Background Art

[0002] Silver powder is an important component of the electronic semiconductor, solar photovoltaic and electrical appliance industries. The current production wastewater of silver powder mainly contains glucose, VC, nitric acid, and macromolecular organic matter (molecular weight of 10,000-30,000) and other substances.

[0003] Membrane method occupies an important position in the water treatment industry. It has the advantages of low cost, small footprint, fast treatment efficiency and easy maintenance. However, the macromolecular organic matter in this type of wastewater is easy to precipitate into black sludge-like substances when the membrane system is running. This black substance is difficult to be intercepted by the filter of the front-end filtering particles, and will slowly pass through the filter element on the filter into the ultrafiltration membrane system and quickly accumulate on the surface of the ultrafiltration membrane, thereby affecting the normal operation of the ultrafiltration membrane system and the subsequent reverse osmosis membrane system, causing the system water production flux to drop rapidly, and causing severe tests on the life of the membrane, thereby limiting its application in silver paste wastewater treatment. Summary of the invention

[0004] The purpose of the present invention is to provide a process for effectively treating silver paste wastewater, aiming to solve the technical problem in the prior art that black sludge substances precipitated from wastewater generated by silver powder production are difficult to be retained by the front-end filter, thereby affecting the normal operation of the ultrafiltration membrane system and the subsequent reverse osmosis membrane system.

[0005] The purpose of the present invention can be achieved through the following technical solutions: A process for effectively treating silver paste wastewater comprises the following steps: Step S1: firstly, the acidic silver paste wastewater containing high molecular organic matter is adjusted to neutral; Step S2: The silver paste wastewater is introduced into the water filter tank through the water inlet pipe. The upward impact of the wastewater causes the driving impeller to rotate, and the driving impeller drives the gear ring to rotate. The gear at the bottom of the filter element rotates along the inner ring of the gear ring. The filter element revolves around the drain pipe and rotates at the same time. The black sludge attached to the filter element is thrown off by the revolution and rotation of the filter element. Step S3: When the filter element revolves, it drives the guide rod to move along the wave guide rail on the guide ring. When the guide rod moves to the lowest point of the wave guide rail, the driving rod moves downward and pushes the sealing cover to seal the movable ring, and at the same time drives the sealing cover and the movable ring to move downward to pressurize the inner cavity of the filter element, so that the black sludge attached to the filter element is sprayed out of the filter element by the pressurization; when the guide rod moves to the highest point of the wave guide rail, the driving rod moves upward to release the restriction on the sealing cover. At this time, the sealing cover is turned over due to the pressure of the water, and the pure water is discharged from the drain pipe; Step S4: When the filter element is in orbit, the filter element contacts the cleaning plate. Since the filter element is also rotating, the cleaning plate scrapes the black sludge material thrown out and sprayed out from the surface of the filter element; Step S5: When the guide rod moves to the lowest point of the wave guide rail, the driving rod 2 moves downward and squeezes the wedge block 2 through the wedge block 1, so that the wedge block 2 drives the cleaning plate to move downward, and the cleaning plate moves downward to brush the surface of the filter element, and the black sludge material scraped and brushed by the cleaning plate enters the cleaning plate through the feed port, and the black sludge material moves downward due to its own weight; Step S6: When the driving rod 2 drives the cleaning plate to move downward, the cleaning plate moves downward to squeeze the sealing plate, and the cleaning plate is inserted into the collecting box. The black sludge material in the cleaning plate flows into the collecting box and is finally discharged to the outside of the water filter tank through the drain pipe.

[0006] A device for effectively treating silver paste wastewater, the device applies the above-mentioned process for effectively treating silver paste wastewater, and the device comprises: A water filter tank, wherein a water inlet pipe is installed at the bottom of the water filter tank, and a drain pipe is rotatably installed at the top of the water filter tank, and the drain pipe is a two-section bent type; A filter element, the top of which is rotatably connected to the bottom of the drain pipe; A driving impeller is rotatably installed in the water filter tank, a gear ring is installed at the output end of the driving impeller, a gear is arranged at the bottom end of the filter element, and the gear is meshed with the gear block part inside the gear ring; A pressure regulating mechanism, wherein the water filter tank and the filter element are connected with a pressure regulating mechanism; Cleaning mechanism: a plurality of cleaning mechanisms are installed on the inner wall of the water filter tank.

[0007] As a preferred embodiment of the above technical solution, the driving impeller and the drain pipe rotate coaxially.

[0008] As a preferred embodiment of the above technical solution, the pressure regulating mechanism includes: A guide ring, wherein a guide ring is fixed on the top of the inner cavity of the water filter tank, and a wave guide rail is provided at the bottom of the guide ring; A guide rod is slidably connected to the wave guide rail, one end of the guide rod is connected to a driving rod 1, the driving rod 1 is L-shaped, and one end of the driving rod 1 passes through the drain pipe and extends into the inner cavity of the filter element; A movable ring, wherein the inner cavity of the filter element is provided with a plurality of slide grooves, and the movable ring is slidably installed in the plurality of slide grooves; The sealing cover is rotatably mounted on the movable ring. When the guide rod moves to the lowest point of the wave guide rail, the driving rod abuts against the sealing cover and drives the sealing cover and the movable ring to move downward.

[0009] As a preferred embodiment of the above technical solution, a step is provided on the inner side of the movable ring, and the sealing cover abuts against the step.

[0010] As a preferred embodiment of the above technical solution, the cleaning mechanism includes: A cleaning plate, a plurality of mounting blocks are fixed on the inner wall of the water filter tank, an elastic telescopic member 1 is arranged on the mounting block, a wedge-shaped block 2 is arranged on the elastic telescopic member 1, and a cleaning plate is fixed on one side of the wedge-shaped block 2; A scraper is arranged on the inner side of the cleaning plate, and a feed port is arranged at the connection between the cleaning plate and the scraper.

[0011] As a preferred embodiment of the above technical solution, a driving rod 2 is fixed on the guide rod, a wedge block 1 is fixed to the bottom end of the driving rod 2, and the inclined surfaces on the wedge block 1 and the wedge block 2 overlap.

[0012] As a preferred embodiment of the above technical solution, a plurality of collecting boxes are arranged on the inner wall of the water filter tank, and the number of the collecting boxes is equal to the number of the cleaning plates. A plurality of sewage pipes are installed through the periphery of the water filter tank, and the sewage pipes are connected with the collecting boxes. A sealing plate is elastically rotatably installed on the collecting box, and the downward projection of the cleaning plate coincides with the sealing plate. An elastic telescopic part 2 is arranged in the collecting box, and the elastic telescopic part 2 passes through the top of the collecting box. A resist plate is arranged on the elastic telescopic part 2, and the resist plate is used to resist the sealing plate. A touch block is arranged on the side of the cleaning plate, and when the cleaning plate moves downward, the touch block contacts and squeezes the elastic telescopic part 2.

[0013] As a preferred embodiment of the above technical solution, a partition net is arranged in the filter element, a plurality of conical holes are opened on the partition net, and the front side of the conical holes is diamond-shaped.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. In the present invention, the filter element revolves and rotates, so that the centrifugal force generated by the rotation can throw off the black sludge attached to the filter element, thereby effectively preventing the black sludge from passing through the filter element and entering the subsequent ultrafiltration membrane system, preventing the black sludge from accumulating on the surface of the ultrafiltration membrane, avoiding affecting the normal operation of the ultrafiltration membrane system and the subsequent reverse osmosis membrane system, and effectively preventing the rapid decrease in the water production flux of the system; 2. In the present invention, the guide rod is driven to move along the wave guide rail by the revolution of the filter element. When the guide rod slowly moves to the lowest point of the wave guide rail, the guide rod drives the driving rod 1 to move slowly downward. The driving rod 1 moves downward and slowly approaches the sealing cover, thereby pushing the sealing plate downward, so that the sealing plate is closed on the movable ring and abuts against the step. At this time, the driving rod 1 will be pushed downward together with the movable ring, so that the movable ring moves along the slide groove. Since the sealing plate seals the movable ring, the movable ring fits the inner wall of the filter element. When the movable ring and the sealing plate move downward, the pressure inside the filter element will increase, so that the water inside the filter element will flow out of the filter element with a large flow rate, so that the black sludge material attached to the surface of the filter element can be sprayed down by water, thereby effectively preventing the black sludge material from passing through the filter element and entering the subsequent ultrafiltration membrane system and accumulating on the surface of the ultrafiltration membrane; 3. In the present invention, the scrapers on the cleaning plates intermittently clean the surface of the filter element, and the driving rod 2 intermittently moves up and down. While cleaning the surface of the filter element, the cleaned black sludge enters the collection box and is finally discharged through the sewage pipe, thereby improving the sewage discharge effect and preventing the black sludge from passing through the filter element. 4. In the present invention, compared with the conventional nitrification + denitrification + A / O biochemical means, the water quality produced by the treatment means of ultrafiltration plus reverse osmosis is stable and the water quality is better, which is better than the local tap water quality. It can be used as cleaning water in production, which can save a lot of tap water fees for enterprises, improve the economic benefits of enterprises, and their production benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the water filter tank structure; Figure 2 This is a schematic diagram of the internal structure of the water filter tank; Figure 3 It is a schematic diagram of the filter element and driving impeller structure; Figure 4 It is a schematic diagram of the cross-sectional structure of the water filter tank; Figure 5 It is a schematic diagram of the structure of the pressure regulating mechanism; Figure 6 It is a schematic diagram of the structure of the movable ring and the sealing cover; Figure 7 It is a schematic diagram of the cleaning mechanism structure; Figure 8 for Figure 7 The enlarged structural diagram at A in the middle; Fig. 9 It is a schematic diagram of the collection box structure; Fig.10 It is a schematic diagram of the structure of the cross section of the partition net; Fig.11 This is an experimental comparison chart for adjusting the parameters of the spacer.

[0016] In the figure: 1. Water filter tank; 2. Water inlet pipe; 3. Drain pipe; 4. Sewage pipe; 5. Filter element; 51. Gear; 52. Spacer; 521. Conical hole; 53. Slide; 6. Driving impeller; 61. Support frame; 7. Gear ring; 8. Pressure regulating mechanism; 81. Guide ring; 811. Wave guide rail; 82. Guide rod; 821. Driving rod one; 83. Movable ring; 831. Step; 84. Sealing cover; 9. Cleaning mechanism; 91. Cleaning plate; 911. Scraper; 912. Feed port; 913. Touch block; 92. Driving rod two; 921. Wedge block one; 93. Mounting block; 94. Elastic telescopic part one; 95. Wedge block two; 96. Collecting box; 961. Sealing plate; 962. Elastic telescopic part two; 963. Baffle plate. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0018] The specific implementation of the present invention is described in detail below in conjunction with specific embodiments.

[0019] like Figure 1-Figure 9 As shown, a process for effectively treating silver paste wastewater comprises the following steps: Step S1: firstly, the acidic silver slurry wastewater containing high molecular organic matter is adjusted to neutrality to prevent the acidic silver slurry wastewater from directly entering the pump body to damage the system components and reduce the silver ions from clogging the membrane system; Step S2: The silver paste wastewater is introduced into the water filter tank 1 through the water inlet pipe 2. The upward impact of the wastewater causes the driving impeller 6 to rotate, and the driving impeller 6 drives the gear ring 7 to rotate. The gear 51 at the bottom of the filter element 5 rotates along the inner ring of the gear ring 7. The filter element 5 revolves around the drain pipe 3 and rotates at the same time. The black sludge attached to the filter element 5 is thrown off by the revolution and rotation of the filter element 5. Step S3: When the filter element 5 revolves, the guide rod 82 is driven to move along the wave guide rail 811 on the guide ring 81. When the guide rod 82 moves to the lowest point of the wave guide rail 811, the driving rod 1 821 moves downward and pushes the sealing cover 84 to seal the movable ring 83, and at the same time drives the sealing cover 84 and the movable ring 83 to move downward to pressurize the inner cavity of the filter element 5, so that the black sludge attached to the filter element 5 is sprayed out from the filter element 5 by the pressurization; when the guide rod 82 moves to the highest point of the wave guide rail 811, the driving rod 1 821 moves upward to release the restriction on the sealing cover 84. At this time, the sealing cover 84 is turned over due to the pressure of the water, and the pure water is discharged from the drain pipe 3; Step S4: When the filter element 5 is in orbit, the filter element 5 contacts the cleaning plate 91. Since the filter element 5 is also rotating, the cleaning plate 91 scrapes the black sludge material thrown out and sprayed out from the surface of the filter element 5; Step S5: When the guide rod 82 moves to the lowest point of the wave guide rail 811, the driving rod 2 92 moves downward and squeezes the wedge block 2 95 through the wedge block 1 921, so that the wedge block 2 95 drives the cleaning plate 91 to move downward, and the cleaning plate 91 moves downward to brush the surface of the filter element 5, and the black sludge material scraped and brushed by the cleaning plate 91 enters the cleaning plate 91 through the feed port 912, and the black sludge material moves downward due to its own weight; Step S6: When the driving rod 2 92 drives the cleaning plate 91 to move downward, the cleaning plate 91 moves downward to squeeze the sealing plate 961, and the cleaning plate 91 is inserted into the collecting box 96. The black sludge material in the cleaning plate 91 flows into the collecting box 96 and is finally discharged to the outside of the water filter tank 1 through the drain pipe 4.

[0020] like Figure 1-Figure 4 As shown, a device for effectively treating silver paste wastewater, the device applies the process for effectively treating silver paste wastewater as described above, and the device comprises: A water filter tank 1, a water inlet pipe 2 is installed at the bottom of the water filter tank 1, and a drain pipe 3 is rotatably installed at the top of the water filter tank 1, and the drain pipe 3 is a two-section bent type; A filter element 5, the top of which is rotatably connected to the bottom of the drain pipe 3; A driving impeller 6 is rotatably installed in the water filter tank 1, a gear ring 7 is installed at the output end of the driving impeller 6, a gear 51 is arranged at the bottom end of the filter element 5, and the gear 51 is meshed with the inner tooth block part of the gear ring 7; A pressure regulating mechanism 8 is connected inside the water filter tank 1 and the filter element 5; Cleaning mechanism 9: Several groups of cleaning mechanisms 9 are installed on the inner wall of the water filter tank 1.

[0021] Furthermore, the impeller 6 and the drain pipe 3 are driven to rotate coaxially.

[0022] In one case of the present embodiment, the drain pipe 3 is in the shape of a letter "ㄣ", and the driving impeller 6 is fixed in the water filter tank 1 through the support frame 61. In actual application of the present embodiment, the silver paste wastewater is introduced into the water filter tank 1 through the water inlet pipe 2, and the driving impeller 6 rotates due to the impact and pressure of the water, and the driving impeller 6 drives the gear ring 7 to rotate. Since the gear 51 and the gear ring 7 are meshed with each other, the gear 51 drives the filter element 5 to move along the gear ring 7, so that the filter element 5 can not only rotate on its own, but also revolve around the drain pipe 3. In this way, due to the centrifugal force generated by the rotation, the black sludge material attached to the filter element 5 can be thrown off, thereby effectively preventing the black sludge material from passing through the filter element 5 and entering the subsequent ultrafiltration membrane system, preventing the black sludge material from accumulating on the surface of the ultrafiltration membrane, avoiding affecting the normal operation of the ultrafiltration membrane system and the subsequent reverse osmosis membrane system, and effectively preventing the rapid decrease of the system water production flux. The wastewater filtered by the filter element 5 is discharged through the drain pipe 3.

[0023] like Figure 4-Figure 6 As shown, the pressure regulating mechanism 8 includes: A guide ring 81 is fixed on the top of the inner cavity of the water filter tank 1, and a wave guide rail 811 is provided at the bottom of the guide ring 81; A guide rod 82 is slidably connected to the wave guide rail 811, and one end of the guide rod 82 is connected to a driving rod 821, which is L-shaped, and one end of the driving rod 821 passes through the drain pipe 3 and extends into the inner cavity of the filter element 5; The movable ring 83, the inner cavity of the filter element 5 is provided with a plurality of slide grooves 53, and the movable ring 83 is slidably installed in the plurality of slide grooves 53; The sealing cover 84 is rotatably mounted on the movable ring 83. When the guide rod 82 moves to the lowest point of the wave guide rail 811, the driving rod 1 821 abuts against the sealing cover 84 and drives the sealing cover 84 and the movable ring 83 to move downward.

[0024] Furthermore, a step 831 is provided on the inner side of the movable ring 83 , and the sealing cover 84 abuts against the step 831 .

[0025] In one case of this embodiment, the portion of the driving rod 821 that passes through the drain pipe 3 is treated to prevent water leakage, while ensuring that the driving rod 821 can move up and down, for example, by adding a sealing ring.

[0026] When the present embodiment is actually used, the filter element 5 revolves around the drain pipe 3, so that the filter element 5 will drive the driving rod 821 and the guide rod 82 to move along the wave guide rail 811. When the guide rod 82 slowly moves to the lowest point of the wave guide rail 811, the guide rod 82 drives the driving rod 821 to slowly move downward. The driving rod 821 moves downward and slowly approaches the sealing cover 84, thereby pushing the sealing cover 84 downward, so that the sealing cover 84 is closed on the movable ring 83 and abuts against the step 831. At this time, the driving rod 821 will push the movable ring 83 downward together with the movable ring 83, so that the movable ring 83 moves along the slide groove 53. Since the sealing cover 84 seals the movable ring 83, the movable ring 83 and the filter element 5 inner wall is fitted, when the movable ring 83 and the sealing cover 84 move downward, the pressure inside the filter element 5 will be increased, so that the water inside the filter element 5 will flow out of the filter element 5, and the flow rate is relatively large, so that the black sludge material attached to the surface of the filter element 5 can be sprayed down by water, thereby effectively preventing the black sludge material from passing through the filter element 5 and entering the subsequent ultrafiltration membrane system to accumulate on the surface of the ultrafiltration membrane. Since the guide rod 82 moves up and down intermittently, it can intermittently pressurize the filter element 5, and intermittently spray the black sludge material attached to the surface of the filter element 5 through water, further preventing the black sludge material from passing through the filter element 5 and entering the subsequent ultrafiltration membrane system to accumulate on the surface of the ultrafiltration membrane; At the same time, the water flowing out of the filter element 5 at a high speed can also flush away the black sludge material near the filter element 5, thereby effectively preventing the black sludge material from approaching the filter element 5 and effectively preventing the black sludge material from passing through the filter element 5 and entering the subsequent ultrafiltration membrane system; In addition, since the driving rod 821 has no direct connection with the sealing cover 84, when the guide rod 82 slowly moves to the highest point of the wave guide rail 811, the guide rod 82 drives the driving rod 821 to slowly move upward. At this time, due to the pressure of the water inside the filter element 5, the sealing cover 84 is flushed open and turned over, so that the treated water is discharged through the drain pipe 3. When the sealing cover 84 turns over, it is flushed open and turned over by the water in the filter element 5, so that no suction will be generated on the inside of the filter element 5, and the sprayed black sludge material will not be adsorbed on the surface of the filter element 5 again.

[0027] like Figure 7-Figure 9 As shown, the cleaning mechanism 9 includes: A cleaning plate 91, a plurality of mounting blocks 93 are fixed on the inner wall of the water filter tank 1, an elastic telescopic member 1 94 is arranged on the mounting block 93, a wedge block 2 95 is arranged on the elastic telescopic member 1 94, and the cleaning plate 91 is fixed on one side of the wedge block 2 95; Scraper 911: A scraper 911 is arranged on the inner side of the cleaning plate 91, and a feed port 912 is opened at the connection between the cleaning plate 91 and the scraper 911.

[0028] In one case of this embodiment, the elastic telescopic member 94 can be an elastic telescopic rod or other elastically telescopic components; wherein the cleaning plate 91 is located directly below the lowest point of the wave guide rail 811.

[0029] In actual application of this embodiment, when the filter element 5 revolves, the surface of the filter element 5 will contact the scraper 911 on the cleaning plate 91, and the black sludge material attached to the surface of the filter element 5 can be scraped off by the scraper 911, and the black sludge material enters the cleaning plate 91 through the feed port 912, effectively preventing the black sludge material from passing through the filter element 5 and entering the subsequent ultrafiltration membrane system; at the same time, the filter element 5 also rotates, so that the scraper 911 scrapes the surface of the filter element 5 while the filter element 5 rotates itself, thereby improving the effect of scraping off the black sludge material, thereby further effectively preventing the black sludge material from passing through the filter element 5 and entering the subsequent ultrafiltration membrane system.

[0030] Furthermore, a second driving rod 92 is fixed on the guide rod 82 , a first wedge block 921 is fixed to the bottom end of the second driving rod 92 , and the inclined surfaces on the first wedge block 921 and the second wedge block 95 overlap.

[0031] In actual application of this embodiment, when the filter element 5 revolves, the guide rod 82 moves along the wave guide rail 811. When the guide rod 82 moves to the lowest point of the wave guide rail 811, the guide rod 82 drives the driving rod 2 92 to move downward and rotate around the drain pipe 3, so that the wedge block 1 921 will slowly move downward and approach the wedge block 2 95, and slowly squeeze the wedge block 2 95, so that the elastic telescopic member 1 94 is compressed, and the wedge block 2 95 will drive the cleaning plate 91 to move downward, thereby cleaning the surface of the filter element 5, thereby further improving the effect of scraping off the black sludge material, and further effectively preventing the black sludge material from penetrating. The filter element 5 enters the subsequent ultrafiltration membrane system; when the guide rod 82 slowly moves to the highest point of the wave guide rail 811, the guide rod 82 drives the driving rod 2 92 to slowly move upward, so that the wedge block 1 921 slowly moves away from the wedge block 2 95. At this time, through the rebound ability of the elastic telescopic member 1 94, the cleaning plate 91 moves upward to clean the surface of the filter element 5 again. With the cooperation of multiple groups of cleaning plates 91, the surface of the filter element 5 can be intermittently cleaned up and down, which further improves the effect of scraping off the black sludge material, and further effectively prevents the black sludge material from passing through the filter element 5 and entering the subsequent ultrafiltration membrane system.

[0032] Furthermore, a plurality of collecting boxes 96 are arranged on the inner wall of the water filter tank 1, and the number of the collecting boxes 96 is equal to the number of the cleaning plates 91. A plurality of sewage pipes 4 are installed through the periphery of the water filter tank 1, and the sewage pipes 4 are connected to the collecting boxes 96. A sealing plate 961 is elastically rotatably installed on the collecting box 96, and the downward projection of the cleaning plate 91 coincides with the sealing plate 961. An elastic telescopic part 962 is arranged in the collecting box 96, and the elastic telescopic part 962 passes through the top of the collecting box 96. A resist plate 963 is arranged on the elastic telescopic part 962, and the resist plate 963 is used to resist the sealing plate 961. A touch block 913 is arranged on the side of the cleaning plate 91. When the cleaning plate 91 moves downward, the touch block 913 contacts and squeezes the elastic telescopic part 962.

[0033] In one case of the present embodiment, the elastic telescopic member 962 may be an elastic telescopic rod or other elastically telescopic member; the elastic rotating part of the sealing plate 961 is provided with a torsion spring, so that the sealing plate 961 has a tendency to always flip upward; the bottom of the inner cavity of the collecting box 96 is inclined, and its inclination direction is toward the sewage pipe 4, which facilitates the discharge of black sludge substances.

[0034] When the cleaning plate 91 is actually used, the bottom of the cleaning plate 91 slowly touches the sealing plate 961 when the cleaning plate 91 moves downward, and the touching block 913 touches the elastic retractable member 2 962, so that the sealing plate 961 slowly rotates into the collecting box 96, so that the elastic retractable member 2 962 is compressed. At the same time, the black sludge material cleaned by the scraper 911 enters the cleaning plate 91 and then enters the collecting box 96 through the cleaning plate 91, and is finally discharged through the sewage pipe 4, thereby improving the cleaning effect of the black sludge material. When the cleaning plate 91 moves upward, the sealing plate 961 slowly returns to its original position due to the rebound ability of the torsion spring, and at the same time, the elastic retractable member 2 962 drives the contact member 2 962 to move back to the original position. The baffle plate 963 moves up to press against the sealing plate 961, so that the sealing plate 961 can still seal the collecting box 96 under water pressure to prevent water from being directly discharged from the collecting box 96; when the cleaning plate 91 moves up, the elastic telescopic member 94 rebounds and drives the cleaning plate 91 to move up, so that the cleaning plate 91 has an up and down shaking action after moving up, and this shaking causes the bottom of the cleaning plate 91 to touch the sealing plate 961, so that the sealing plate 961 flips into the collecting box 96. At this time, the shaking of the cleaning plate 91 will shake down the black sludge material remaining in the cleaning plate 91 and enter the collecting box 96, and finally be discharged through the sewage pipe 4, thereby improving the sewage discharge effect.

[0035] like Figure 5 and Fig.10 As shown, a spacer 52 is provided in the filter element 5, and a plurality of tapered holes 521 are formed on the spacer 52, and the front side of the tapered holes 521 is diamond-shaped.

[0036] In one case of this embodiment, in the filter element 5, the spacer 52 affects the molecular weight of the retained substances of the filter element 5, thereby affecting the anti-pollution performance of the filter element 5. The present invention increases the thickness of the conventional 28mil spacer 52 to 33mil. Since the thickness of the spacer 52 affects the performance of the filter element 5, the thinner the spacer 52 is, the easier it is to obtain a higher flow rate, and the pressure difference becomes higher. Although the thicker the spacer 52 is, the more difficult it is to obtain a higher flow rate, it can effectively prevent black sludge substances from passing through the filter element 5 and entering the subsequent ultrafiltration membrane system. Here, a 33mil spacer 52 and a unique diamond mesh structure are used. After the wastewater enters the diamond mesh, a special hydraulic angle of 90° is formed to form a position that is more conducive to triggering turbulence. The arrangement can effectively prevent black sludge from passing through the filter element 5 while relatively increasing the water flow rate, and because the unique rhombus structure can form an oblique triangular support, it has higher flux stability than the conventional corrugated screen 52; in addition, the cross-section of the rhombus mesh is conical, so when black sludge adheres to the filter element 5, it is difficult for the black sludge to pass through the conical hole 521, and when pressure is applied to the filter element 5, water can be easily discharged from the conical hole 521, and the discharge speed is relatively fast, thereby effectively preventing black sludge from passing through the filter element 5 and entering the subsequent ultrafiltration membrane system.

[0037] In practical application, if Fig.11 (a) shows: at 25 0 Under the C environment and 1 bar pressure, the conventional filter element 5 was used to treat the silver pulp wastewater with a flow rate of 7500µs / cm and a COD content of 5000mg / L. The separator 52 of the conventional filter element 5 was a 28mil corrugated mesh. The operating data showed that its water production flux was rapidly decreasing every day. After 7 days of operation, the flux decreased from 2.2m3 / h to 0.2m3 / h. The membrane was seriously clogged, so this type of filter element 5 was not suitable for this type of wastewater. like Fig.11 (b) shows: the filter element 5 with an open flow channel is made of a 45° angle 28mil diamond mesh spacer. After 7 days of operation, the flux decays from 2.2m3 / h to 1.5m3 / h. The flux decay is much better than that of the conventional filter element 5, but the flux drop is still large. It is still not well suitable for this type of wastewater. like Fig.11 As shown in (c): Similarly, the thickness of the spacer 52 made of a 28 mil diamond-shaped spacer 52 with an open flow channel is adjusted to 33 mil. After 7 days of operation, the stability of the water production flux is greatly improved, but the flux still has a high attenuation, from 2.2 m3 / h to 1.55 m3 / h, and the flux attenuation is 29.5%; like Fig.11As shown in (d), after only changing the shape of the screen 52, after 7 days of operation, the water production flow rate decayed from the initial 2.2 m3 / h to 1.25 m3 / h, a decay of nearly 50%. The flux decay is large and is still not suitable for this scenario. like Fig.11 As shown in (e): the angle of the diamond-shaped spacer 52 with an open flow channel is changed from 45° to 90°, and it can be seen that the flux stability of the filter element 5 is further improved. After 7 days of continuous operation, it can be seen that the water production flux decays from the initial 2.2m3 / h to 1.74m3 / h, and the flux decrease is only 20.9%, which shows that the adjustment of the angle has a greater impact on the flux of the filter element 5; like Fig.11 As shown in (f): After the thickness of the mesh is changed to 33 mil and the angle of the diamond mesh 52 is 90°, the filter element 5 has a flux drop from 2.2 m3 / h to 2.05 m3 / h after 7 days of operation, and the flux attenuation is only 7%, which greatly improves the flux stability of the filter element 5. While being able to relatively increase the water flow rate, it can effectively prevent black sludge from passing through the filter element 5.

[0038] At the same time, this process is compared with a case of a treatment plant using nitrification + denitrification + biochemical treatment. A treatment plant is treating 2000m3 / d of silver powder wastewater. The plant occupies a large area of ​​nearly 800 square meters, and the treated water quality is unstable. Occasionally, the ammonia nitrogen index >35 cannot meet the standard of external discharge, delaying the treatment time and reducing the silver powder production efficiency. The plant can only meet the external discharge treatment of wastewater by stopping production and stopping work, which affects the production efficiency of the enterprise. The membrane method only needs to occupy 200 square meters to solve the treatment volume of 2000m3 / d. In addition, the water quality of the produced water is greatly improved compared with this method. After ultrafiltration + reverse osmosis treatment, the produced water conductivity is <5us / cm, COD <3mg / L, ammonia nitrogen <1mg / L, and total nitrogen <1mg / L. The produced water is far from the discharge standard of the control and can be reused in the production line for cleaning water, which greatly saves the company's tap water fee.

[0039] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A process for effectively treating silver paste wastewater, characterized in that: The following steps are involved: Step S1: firstly, the acidic silver paste wastewater containing high molecular organic matter is adjusted to neutral; Step S2: silver slurry wastewater is introduced into the water filter tank (1) through the water inlet pipe (2), and the upward impact of the wastewater causes the driving impeller (6) to rotate, which in turn drives the gear ring (7) to rotate, and the gear (51) at the bottom end of the filter element (5) rotates along the inner ring of the gear ring (7), and the filter element (5) revolves around the drain pipe (3) and also rotates on its own, and the black sludge attached to the filter element (5) is thrown off by the revolution and rotation of the filter element (5); Step S3: When the filter element (5) revolves, it drives the guide rod (82) to move along the wave guide rail (811) on the guide ring (81); when the guide rod (82) moves to the lowest point of the wave guide rail (811), the driving rod 1 (821) moves downward and pushes the sealing cover (84) to seal the movable ring (83), and at the same time drives the sealing cover (84) and the movable ring (83) to move downward to pressurize the inner cavity of the filter element (5), so that the black sludge material attached to the filter element (5) is sprayed out from the filter element (5); when the guide rod (82) moves to the highest point of the wave guide rail (811), the driving rod 1 (821) moves upward to release the restriction on the sealing cover (84), and at this time, the sealing cover (84) is turned over due to the pressure of the water, and the pure water is discharged from the drain pipe (3); Step S4: When the filter element (5) is in orbital motion, the filter element (5) contacts the cleaning plate (91). Since the filter element (5) is also rotating, the cleaning plate (91) scrapes the black sludge material that is thrown out and sprayed out from the surface of the filter element (5); Step S5: When the guide rod (82) moves to the lowest point of the wave guide rail (811), the driving rod 2 (92) moves downward and squeezes the wedge block 2 (95) through the wedge block 1 (921), so that the wedge block 2 (95) drives the cleaning plate (91) to move downward, and the cleaning plate (91) moves downward to brush the surface of the filter element (5), and the black sludge material scraped and brushed by the cleaning plate (91) enters the cleaning plate (91) through the feed port (912), and the black sludge material moves downward due to its own weight; Step S6: When the driving rod (92) drives the cleaning plate (91) to move downward, the cleaning plate (91) moves downward to squeeze the sealing plate (961), and the cleaning plate (91) is inserted into the collecting box (96). The black sludge in the cleaning plate (91) flows into the collecting box (96) and is finally discharged to the outside of the water filter tank (1) through the sewage discharge pipe (4).

2. An apparatus for effectively treating silver paste wastewater, characterized in that: The device uses the process for effectively treating silver paste wastewater as described in claim 1 above, and the device comprises: A water filter tank (1), wherein a water inlet pipe (2) is installed at the bottom of the water filter tank (1), and a drainage pipe (3) is rotatably installed at the top of the water filter tank (1), wherein the drainage pipe (3) is a two-section bent type; A filter element (5), wherein the top of the filter element (5) is rotatably connected to the bottom of the drain pipe (3); A driving impeller (6), wherein the driving impeller (6) is rotatably mounted in the water filter tank (1), a gear ring (7) is mounted at the output end of the driving impeller (6), a gear (51) is disposed at the bottom end of the filter element (5), and the gear (51) is meshed with the inner tooth block portion of the gear ring (7); A pressure regulating mechanism (8), wherein the water filter tank (1) and the filter element (5) are connected with a pressure regulating mechanism (8); Cleaning mechanism (9), a plurality of groups of cleaning mechanisms (9) are installed on the inner wall of the water filter tank (1).

3. The device for effectively treating silver paste wastewater according to claim 2, characterized in that: The driving impeller (6) and the drainage pipe (3) rotate coaxially.

4. The device for effectively treating silver paste wastewater according to claim 2, characterized in that: The pressure regulating mechanism (8) comprises: A guide ring (81), wherein the guide ring (81) is fixed to the top of the inner cavity of the water filter tank (1), and a wave guide rail (811) is provided at the bottom of the guide ring (81); A guide rod (82), the wave guide rail (811) being slidably connected to the guide rod (82), one end of the guide rod (82) being connected to a driving rod 1 (821), the driving rod 1 (821) being L-shaped, and one end of the driving rod 1 (821) passing through the drain pipe (3) and extending into the inner cavity of the filter element (5); A movable ring (83), wherein the inner cavity of the filter element (5) is provided with a plurality of slide grooves (53), and the movable ring (83) is slidably installed in the plurality of slide grooves (53); A sealing cover (84) is rotatably mounted on the movable ring (83). When the guide rod (82) moves to the lowest point of the wave guide rail (811), the driving rod 1 (821) abuts against the sealing cover (84) and drives the sealing cover (84) and the movable ring (83) to move downward.

5. The device for effectively treating silver paste wastewater according to claim 4, characterized in that: A step (831) is provided on the inner side of the movable ring (83), and the sealing cover (84) abuts against the step (831).

6. The device for effectively treating silver paste wastewater according to claim 4, characterized in that: The cleaning mechanism (9) comprises: A cleaning plate (91), a plurality of mounting blocks (93) being fixed on the inner wall of the water filter tank (1), an elastic telescopic member 1 (94) being provided on the mounting block (93), a wedge-shaped block 2 (95) being provided on the elastic telescopic member 1 (94), and the cleaning plate (91) being fixed on one side of the wedge-shaped block 2 (95); A scraper (911) is provided on the inner side of the cleaning plate (91), and a feed port (912) is provided at the connection between the cleaning plate (91) and the scraper (911).

7. The device for effectively treating silver paste wastewater according to claim 6, characterized in that: A second driving rod (92) is fixed on the guide rod (82), a wedge block (921) is fixed at the bottom end of the second driving rod (92), and the inclined surfaces on the first wedge block (921) and the second wedge block (95) overlap.

8. The device for effectively treating silver paste wastewater according to claim 7, characterized in that: A plurality of collecting boxes (96) are arranged on the inner wall of the water filter tank (1), the number of the collecting boxes (96) being equal to the number of the cleaning plates (91), a plurality of sewage pipes (4) are installed through the periphery of the water filter tank (1), the sewage pipes (4) are connected to the collecting boxes (96), a sealing plate (961) is elastically rotatably installed on the collecting box (96), the downward projection of the cleaning plate (91) coincides with the sealing plate (961), and an elastically retractable The second elastic telescopic member (962) passes through the top of the collecting box (96); a stop plate (963) is provided on the second elastic telescopic member (962); the stop plate (963) is used to abut against the sealing plate (961); a touch block (913) is provided on the side of the cleaning plate (91); when the cleaning plate (91) moves downward, the touch block (913) contacts with the second elastic telescopic member (962) and squeezes the second elastic telescopic member (962).

9. The device for effectively treating silver paste wastewater according to claim 2, characterized in that: A partition net (52) is arranged inside the filter element (5), and a plurality of conical holes (521) are formed on the partition net (52), and the front faces of the conical holes (521) are rhombus-shaped.

Images