An etching acid circulation system

Abstract

The present application relates to an etching acid circulation system, and relates to the technical field of glass panel processing, which includes a sedimentation mechanism and a precision filtering mechanism, wherein the sedimentation mechanism includes a primary sedimentation component, multiple groups of secondary sedimentation components, and a tertiary sedimentation component, wherein the tertiary sedimentation component is connected to the primary sedimentation component through any of the secondary sedimentation components, and the precision filtering mechanism is connected to the tertiary sedimentation component. The present application has the effect of improving the processing efficiency of etching acid.

Description

Technical Field

[0001] The present application relates to the technical field of glass panel processing, and in particular to an etching acid circulation system. Background Art

[0002] In the process of display glass screen processing, etching liquid is needed to etch and thin the 0.6mm-1.1mm thick glass to prepare ultra-thin glass for display glass panels. Glass thinning etching liquid mainly includes HF-H 2 SO 4 During the etching process, the hydrofluoric acid in the etching solution is continuously consumed and the content decreases, while the content of the etching product fluorosilicic acid gradually increases; when the fluorosilicic acid content reaches a certain concentration, the viscosity of the etching solution system increases significantly, forming orthosilicic acid flocs or crystals, which not only affect the subsequent etching rate, but also adhere to the surface of the glass substrate, affecting product quality.

[0003] At present, the main treatment method for glass thinning etching waste liquid is: first physically settle the glass thinning etching waste liquid, then add a neutralizer to the etching waste liquid, convert fluorosilicic acid into calcium fluorosilicate, sodium fluorosilicate or potassium fluorosilicate precipitate, perform chemical sedimentation, and finally filter the sediment and recycle the treated etching liquid.

[0004] However, in order to ensure a better treatment effect, the time required for physical sedimentation and chemical reaction sedimentation is relatively long, resulting in a slow etching acid circulation efficiency. Therefore, it is necessary to develop an etching acid circulation system with high treatment efficiency and better effect. Summary of the invention

[0005] In order to improve the treatment efficiency of etching acid waste liquid, the present application provides an etching acid circulation system.

[0006] The present application provides an etching acid circulation system adopting the following technical solution:

[0007] An etching acid circulation system includes a sedimentation mechanism and a precision filtering mechanism, wherein the sedimentation mechanism includes a primary sedimentation component, multiple groups of secondary sedimentation components and a tertiary sedimentation component, wherein one group of the secondary sedimentation components is connected to the primary sedimentation component, and another group of the secondary sedimentation components is connected to the tertiary sedimentation component, and multiple groups of the secondary sedimentation components operate alternately; the precision filtering mechanism is connected to the tertiary sedimentation component.

[0008] By adopting the above technical scheme, the etching acid waste liquid is completely treated and recovered by passing through the first-stage sedimentation component, any second-stage sedimentation component, the third-stage sedimentation component and the precision filtering mechanism in sequence, so that the etching acid can be recycled; multiple groups of second-stage sedimentation components can operate alternately, while ensuring that the etching acid sedimentation time is sufficient, the entire system can operate uninterruptedly, ensuring the treatment effect of the waste liquid and improving the treatment efficiency of the etching acid.

[0009] In a specific feasible implementation scheme, the primary sedimentation component includes a primary sedimentation piece, a solid-liquid separation piece and a liquid conveying piece. The primary sedimentation piece includes a primary sedimentation tank. A liquid inlet and an overflow port are respectively provided on the side walls of the primary sedimentation tank. A primary filter screen is provided inside the side wall of the primary sedimentation tank and at a place of the overflow port; the liquid conveying piece is provided at a place of the overflow port, and the primary sedimentation tank is connected to any of the secondary sedimentation components through the liquid conveying piece; the solid-liquid separation piece is provided inside the side wall of the primary sedimentation tank.

[0010] By adopting the above technical scheme, the etching acid waste liquid flows into the primary sedimentation tank from the liquid inlet, and waste solids such as glass fragments and orthosilicic acid crystals are deposited at the bottom of the primary sedimentation tank and are removed by the solid-liquid separation component. The liquid continues to accumulate and enters any secondary sedimentation component from the overflow port through the primary filter screen and the liquid conveying component. The primary filter screen preliminarily removes the solids, reducing the possibility of waste solids entering the secondary sedimentation component. The solid-liquid separation component reduces the possibility of excessive waste solid deposition in the primary sedimentation tank affecting the sedimentation effect.

[0011] In a specific feasible implementation scheme, the liquid conveying component 1 includes a fixed liquid outlet pipe, a steering liquid outlet pipe, a steering motor, a steering screw, a movable seat, a mounting seat and a fixed seat, the steering motor and the mounting seat are both arranged on the outer wall of the primary sedimentation tank, one end of the steering screw is connected to the output end of the steering motor, and the other end of the steering screw is rotatably connected to the mounting seat; the movable seat is threadedly sleeved on the steering screw; one end of the steering liquid outlet pipe is connected to the movable seat, and the other end of the steering liquid outlet pipe faces any of the secondary sedimentation components; the fixed seat is arranged on any of the secondary sedimentation components, and a connecting groove for the fixed seat to slide is provided on the outer wall of the steering liquid outlet pipe; one end of the fixed liquid outlet pipe is connected to the overflow port 1, and the other end of the fixed liquid outlet pipe is located above the fixed seat and connected to the steering liquid outlet pipe.

[0012] By adopting the above technical scheme, the etching acid waste liquid after preliminary sedimentation flows from the fixed liquid outlet pipe into the steering liquid outlet pipe, and then into any secondary sedimentation component; the steering motor drives the steering screw to rotate, thereby driving the moving seat to move in the length direction of the steering screw, and then drives the steering liquid outlet pipe to rotate, so that the steering liquid outlet pipe can introduce the etching acid waste liquid into different secondary sedimentation components, which can facilitate the alternating operation of different secondary sedimentation components.

[0013] In a specific feasible implementation mode, the solid-liquid separation element includes a solid conveying pipe, a conveying motor, a guide rod, conveying blades and a solid storage box, the solid storage box is arranged on one side of the primary sedimentation tank, one end of the solid conveying pipe is connected to the primary sedimentation tank, and the end of the solid conveying pipe away from the primary sedimentation tank is connected to the solid storage box and is higher than the overflow port one in the height direction; the conveying motor is arranged on the solid conveying pipe, the guide rod is rotatably arranged in the side wall of the solid conveying pipe, and one end of the guide rod is connected to the output end of the conveying motor, and the conveying blade is arranged on the guide rod.

[0014] By adopting the above technical scheme, under the drive of the conveying motor, the guide rod drives the conveying blades to rotate continuously, and the waste solids in the primary sedimentation tank are gradually sent into the solid temporary storage box, thereby reducing the possibility of excessive deposition of waste solids in the primary sedimentation tank and affecting the sedimentation effect. At the same time, the waste solids in the primary sedimentation tank can be cleared while the cycle operation is uninterrupted, ensuring work efficiency.

[0015] In a specific possible implementation mode, each group of the secondary sedimentation components includes a saturated sedimentation component, a cooling crystallization component and a second liquid conveying component, the saturated sedimentation component includes a saturated sedimentation tank, and each of the saturated sedimentation tanks is arranged in sequence; the cooling crystallization component is arranged in the side wall of the saturated sedimentation tank, the second liquid conveying component is arranged on the side wall of the saturated sedimentation tank away from the fixed seat, and the saturated sedimentation tank is communicated with the tertiary sedimentation component through the second liquid conveying component.

[0016] By adopting the above technical scheme, after the etching acid waste liquid enters the saturated sedimentation tank, the cooling crystallization component reduces the temperature of the etching acid waste liquid, thereby reducing the saturation of fluorosilicic acid and the like, promoting the precipitation of orthosilicic acid, and further removing the fluorosilicic acid in the etching acid waste liquid; the treated etching acid waste liquid then enters the tertiary sedimentation component through the liquid conveying component; before chemical sedimentation, the saturation of the etching acid waste liquid is reduced to further remove orthosilicic acid crystals, which can reduce the concentration of fluorosilicic acid and the like participating in the chemical reaction, thereby reducing the amount of neutralizer used, which is beneficial to reducing costs and improving the treatment effect at the same time.

[0017] In a specific possible implementation manner, each group of the cooling crystallization parts includes a crystallization rack, a support rack, an elevator and a connecting rope. The elevator is arranged above the saturated sedimentation tank through the support rack, and the output end of the elevator is connected to the crystallization rack through the connecting rope. The crystallization rack is located in the side wall of the saturated sedimentation tank.

[0018] By adopting the above technical scheme, orthosilicic acid such as fluorosilicic acid in the etching acid waste liquid precipitates and adheres to the crystallization rack. When there are too many orthosilicic acid crystals attached to the crystallization rack, the elevator drives the crystallization rack to rise by connecting the suspension rope, and the staff can remove the crystals attached to the crystallization rack, thereby reducing the possibility of reducing the crystal precipitation efficiency due to too many crystals attached to the crystallization rack.

[0019] In a specific feasible implementation scheme, the liquid conveying component 2 includes a liquid extraction pipe 1, a connecting hose, a liquid extraction pipe 2, a liquid extraction pump and a telescopic cylinder. The liquid extraction pump is arranged on the saturated sedimentation tank and is located at one end of the saturated sedimentation tank close to the three-stage sedimentation component. One end of the liquid extraction pipe 2 is connected to the liquid extraction pump, and the other end of the liquid extraction pipe 2 is connected to the three-stage sedimentation component; the end of the liquid extraction pump away from the liquid extraction pipe 2 is connected to the liquid extraction pipe 1 through the connecting hose; the end of the liquid extraction pipe 1 away from the connecting hose is provided with a secondary filter; the telescopic cylinder is arranged on the saturated sedimentation tank, and a connecting frame is provided on the liquid extraction pipe 1, and the end of the connecting frame away from the liquid extraction pipe 1 is connected to the output end of the telescopic cylinder.

[0020] By adopting the above technical scheme, the telescopic cylinder contracts and drives the liquid extraction pipe 1 to enter the side wall of the saturated sedimentation tank and immerse it in the etching acid waste liquid. Under the action of the liquid extraction pump, the etching acid waste liquid after crystallization treatment enters the third-stage sedimentation component through the liquid extraction pipe 1, the connecting hose and the liquid extraction pipe 2; the secondary filter screen allows the precipitated etching acid crystals to remain in the saturated sedimentation tank; the telescopic cylinder is used to reduce the time that the liquid extraction pipe 1 stays in the saturated sedimentation tank, and the possibility that the original silicic acid crystals are precipitated and attached to the pipe wall of the liquid extraction pipe 1 and the connecting hose or attached to the secondary filter screen is reduced, thereby ensuring the application effect of the secondary filter screen, the liquid extraction pipe 1 and the connecting hose.

[0021] In a specific possible implementation mode, the three-stage sedimentation component includes a chemical sedimentation element, a stirring element and a solid-liquid separation element. The chemical sedimentation element includes a chemical sedimentation tank, and one side of the chemical sedimentation tank is connected to any one of the liquid extraction pipes 2; the stirring element includes a stirring motor and a stirring rod, and the stirring motor is arranged on the chemical sedimentation tank, the stirring rod is connected to the output end of the stirring motor, and the stirring rod is located in the side wall of the chemical sedimentation tank; an overflow port 2 is also arranged on the side wall of the chemical sedimentation tank, and the chemical sedimentation tank is connected to the precision filtering mechanism through the overflow port 2; a three-stage filter screen is also arranged in the side wall of the chemical sedimentation tank and located at the overflow port 2; a sedimentation outlet 1 is arranged on the bottom wall of the chemical sedimentation tank, and the chemical sedimentation tank is connected to the solid-liquid separation element 2 through the sedimentation outlet 1.

[0022] By adopting the above technical scheme, the staff puts the neutralizer into the chemical sedimentation tank, and the etching acid waste liquid reacts chemically with the neutralizer after entering the chemical sedimentation tank to generate precipitation; the stirring motor drives the stirring rod to rotate, thereby accelerating the rate of chemical reaction in the chemical sedimentation tank, thereby accelerating the treatment efficiency of the etching acid waste liquid; the precipitation is deposited at the bottom of the chemical sedimentation tank, and enters the solid-liquid separation component 2 through the precipitation outlet 1; the liquid after the reaction is filtered through the three-stage filter screen, and enters the precision filtration mechanism through the overflow port 2.

[0023] In a specific feasible implementation scheme, the second solid-liquid separation component includes a separation tank, a guide pipe, a control valve, a separation net, a drainage pipe and a drainage pump. The separation tank facility is located below the chemical sedimentation tank. The guide pipe is connected to the chemical sedimentation tank through the sedimentation outlet one, and the control valve is arranged at one end of the guide pipe close to the sedimentation outlet one; a sedimentation outlet two is penetrated through the side wall of the separation tank, a sedimentation temporary storage box is arranged on the outer wall of the separation tank and located at the sedimentation outlet two, the separation net is arranged in the side wall of the separation tank, and the separation net is inclined toward the sedimentation outlet two; a reflux channel is penetrated between the end of the sedimentation temporary storage box away from the sedimentation outlet two and the separation tank, and a reflux filter net is arranged in the side wall of the reflux channel; one end of the drainage pipe is connected to the end of the separation tank away from the guide pipe, and the other end of the drainage pipe is connected to the precision filtration mechanism through the drainage pump.

[0024] By adopting the above technical scheme, when there is too much sediment accumulated in the saturated sedimentation tank, the control valve is opened, and the solid-liquid mixture flows into the separation tank from the guide pipe, the solid is intercepted by the separation net, and falls into the sedimentation temporary storage box along the inclination direction of the separation net, and the liquid passes through the separation net and, under the action of the drainage pump, enters the precision filter element through the drainage pipe; a small amount of liquid in the sedimentation temporary storage box enters the separation tank again through the reflux channel, and the reflux filter intercepts the solid sediment in the solid temporary storage box, which is beneficial to reduce the waste of etching acid.

[0025] In a specific feasible implementation scheme, the precision filtering mechanism includes a filter barrel, a first high filter screen, a second high filter screen and a high-efficiency filter element, a liquid inlet pipe 1 is connected between the filter barrel and the overflow port 2, and a liquid inlet pipe 2 is connected between the filter barrel and the drainage pump, so that the first high filter screen, the second high filter screen and the high-efficiency filter element are arranged in the side wall of the filter barrel in sequence, and are all located on the same side of the liquid inlet pipe 1 and the liquid inlet pipe 2.

[0026] By adopting the above technical solution, the treated etching acid liquid is fully filtered in the filter barrel, further reducing the solid particles carried in the etching acid liquid, ensuring the treatment effect of the etching acid recovery liquid, and facilitating the reuse of the etching acid recovery liquid.

[0027] In summary, this application has the following beneficial technical effects:

[0028] 1. The etching acid waste liquid is processed and recovered in sequence through a primary sedimentation component, any secondary sedimentation component, a tertiary sedimentation component and a precision filtering mechanism, so that the etching acid can be recycled; multiple groups of secondary sedimentation components can work alternately, and when one group of secondary sedimentation components is in a sedimentation state, another group of secondary sedimentation components is connected to the tertiary sedimentation component to input the etching acid waste liquid that has been completely precipitated into the secondary sedimentation component, thereby ensuring the continuity of the liquid inlet of the tertiary sedimentation component, that is, while ensuring that the etching acid sedimentation time is sufficient, the entire system can be operated uninterruptedly, so that the etching acid waste liquid can achieve a better treatment effect, and the treatment efficiency of the etching acid waste liquid is improved;

[0029] 2. After the etching acid waste liquid enters the saturated sedimentation tank, the cooling crystallization component reduces the liquid temperature, thereby reducing the saturation of fluorosilicic acid and the like, promoting the crystallization of orthosilicic acid, and further removing the fluorosilicic acid in the etching acid waste liquid; the treated etching acid waste liquid then enters the tertiary sedimentation component through the second liquid conveying component; before chemical sedimentation, the saturation of the etching acid waste liquid is reduced to further remove the orthosilicic acid crystals, which can reduce the concentration of fluorosilicic acid and the like participating in the chemical reaction, thereby reducing the amount of neutralizer used, which is beneficial to reducing costs, while improving the treatment effect of the etching acid waste liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of an etching acid circulation system in an embodiment of the present application;

[0031] Figure 2 is a schematic cross-sectional view in the vertical direction for illustrating a liquid conveying member 1 in an embodiment of the present application;

[0032] Figure 3 is a schematic cross-sectional view in the vertical direction for illustrating a solid-liquid separation element 1 in an embodiment of the present application;

[0033] Figure 4 yes Figure 3 A magnified schematic diagram of part A;

[0034] Figure 5 yes Figure 2 A magnified schematic diagram of part B;

[0035] Figure 6 It is a cross-sectional schematic diagram in the vertical direction for showing the secondary sedimentation assembly in the embodiment of the present application;

[0036] Figure 7 is a schematic cross-sectional view in the vertical direction for illustrating the second liquid conveying member in the embodiment of the present application;

[0037] Figure 8 It is a vertical cross-sectional schematic diagram used to illustrate the three-stage separation component in the embodiment of the present application;

[0038] Fig. 9 It is a vertical cross-sectional schematic diagram used to demonstrate the precision filtering mechanism in the embodiment of the present application.

[0039] Description of reference numerals:

[0040] 1. Precision filtration mechanism; 11. Filter barrel; 111. Liquid inlet pipe 1; 112. Liquid inlet pipe 2; 113. Liquid outlet pipe 1; 114. Output pump; 115. Liquid outlet pipe 2; 12. First high filter screen; 13. Second high filter screen; 14. High-efficiency filter element; 141. Filter element mounting plate; 2. Primary sedimentation component; 21. Primary sedimentation component; 211. Primary sedimentation tank; 212. Liquid inlet; 213. Overflow port 1; 214. Primary filter screen; 215. Mounting ring 1; 216. Mounting slot 1; 22. Solid-liquid separation component 1; 221, solid conveying pipe; 222, conveying motor; 223, guide rod; 224, conveying blade; 225, solid temporary storage box; 226, solid guide pipe; 23, liquid conveying component 1; 231, fixed liquid outlet pipe; 232, steering liquid outlet pipe; 233, steering motor; 234, steering screw; 235, moving seat; 236, mounting seat; 237, fixed seat; 238, ball head connecting rod; 3, secondary sedimentation component; 31, saturated sedimentation component; 311, saturated sedimentation tank; 32. Cooling crystallization part; 321. Support frame; 322. Crystallization frame; 323. Lift; 324. Connecting rope; 325. Inlet pipe; 326. Outlet pipe; 33. Liquid conveying part 2; 331. Extraction pipe 1; 332. Connecting hose; 333. Extraction pipe 2; 334. Extraction pump; 335. Secondary filter screen; 336. Telescopic cylinder; 337. Connecting frame; 4. Three-stage sedimentation assembly; 41. Three-stage sedimentation tank; 411. Partition plate 2; 412. Sedimentation outlet 1; 42. Chemical sedimentation Components; 421, chemical sedimentation tank; 422, overflow port 2; 423, tertiary filter; 43, solid-liquid separation component 2; 431, separation tank; 432, guide pipe; 433, control valve; 434, separation net; 435, sedimentation temporary storage box; 436, sedimentation outlet 2; 437, reflux filter; 438, drainage pipe; 439, drainage pump; 44, stirring element; 441, support plate; 442, stirring motor; 443, stirring rod; 5, secondary sedimentation tank; 51, partition plate 1; 6, acid addition tank. DETAILED DESCRIPTION

[0041] The embodiment of the present application discloses an etching acid circulation system.

[0042] The following is combined with Figure 1-9 This application is described in further detail.

[0043] Reference Figure 1 The etching acid circulation system includes a sedimentation mechanism and a precision filtering mechanism 1. The sedimentation mechanism includes a primary sedimentation component 2, a secondary sedimentation component 3 and a tertiary sedimentation component 4 which are sequentially connected. The precision filtering mechanism 1 is connected to the tertiary sedimentation component 4. After three sedimentations in sequence, the etching acid waste liquid enters the precision filtering mechanism 1 to be fully filtered and the solid matter in the liquid is removed.

[0044] Reference Figure 2 The first-stage sedimentation component 2 includes a primary sedimentation piece 21, and the primary sedimentation piece 21 includes a primary sedimentation tank 211. The top of the side wall of the primary sedimentation tank 211 is respectively provided with a liquid inlet 212 and an overflow port 213. The overflow port 213 is located on the side wall of the primary sedimentation tank 211 close to the secondary sedimentation component 3. In the vertical direction, the liquid inlet 212 is higher than the overflow port 213.

[0045] Reference Figure 3 and Figure 4 A primary filter screen 214 is disposed in the side wall of the primary sedimentation tank 211 and at the overflow port 213. A mounting ring strip 215 is disposed in the side wall of the primary sedimentation tank 211 and around the overflow port 213. A mounting groove 216 for mounting the primary filter screen 214 is disposed in the side wall of the mounting ring strip 215, and the upper end of the mounting ring strip 215 is open. The primary filter screen 214 is plugged into the mounting ring strip 215 through the mounting groove 216, so that the primary filter screen 214 can be easily disassembled, cleaned or replaced.

[0046] Reference Figure 2 The primary sedimentation component 2 also includes a solid-liquid separation component 22 and a liquid conveying component 23. The solid-liquid separation component 22 is arranged on one side of the primary sedimentation tank 211, and the liquid conveying component 23 is arranged on the side wall of the primary sedimentation tank 211 facing the secondary sedimentation component 3, and the liquid conveying component 23 is connected to the primary sedimentation tank 211 through an overflow port 213.

[0047] Reference Figure 3 The solid-liquid separation element 22 includes a solid conveying pipe 221, a conveying motor 222, a guide rod 223, a conveying blade 224 and a solid temporary storage box 225. The solid conveying pipe 221 is obliquely arranged on one side of the primary sedimentation tank 211, and the lower end of the solid conveying pipe 221 in the height direction is connected to the bottom wall of the primary sedimentation tank 211. The solid temporary storage box 225 is arranged on one side of the primary sedimentation tank 211, and the top of the solid temporary storage box 225 is open and located below the end of the solid conveying pipe 221 away from the primary sedimentation tank 211. The end of the solid conveying pipe 221 away from the primary sedimentation tank 211 is connected to a solid guide pipe 226, and the end of the solid guide pipe 226 away from the solid conveying pipe 221 faces the solid temporary storage box 225 and is higher than the overflow port 213 in the vertical direction. The conveying motor 222 is fixedly mounted at one end of the solid conveying pipe 221 away from the primary settling tank 211, and the guide rod 223 is rotatably mounted in the side wall of the solid conveying pipe 221, and one end of the guide rod 223 is connected to the output end of the conveying motor 222. The conveying blades 224 are evenly arranged on the guide rod 223 along the length direction of the guide rod 223. In this embodiment, the conveying blades 224 are spiral blades evenly spirally arranged on the guide rod 223.

[0048] Reference Figure 2 and Figure 3 , the etching acid waste liquid enters the primary sedimentation tank 211 from the liquid inlet 212, and the waste solids such as glass fragments and orthosilicic acid crystals in the etching acid waste liquid are continuously deposited at the bottom of the primary sedimentation tank 211. Driven by the conveying motor 222, the guide rod 223 drives the conveying blade 224 to rotate continuously, and the waste solids move along the conveying blade 224 in the solid conveying pipe 221, and fall into the solid temporary storage box 225 through the solid guide pipe 226. The etching acid waste liquid is transported from the overflow port 213 through the liquid conveying member 23 to the secondary sedimentation component 3. The primary filter 214 intercepts the waste solids in the primary sedimentation tank 211, which is convenient for cleaning the waste solids.

[0049] Reference Figure 5 and Figure 6 The liquid delivery assembly 1 includes a fixed liquid outlet pipe 231, a steering liquid outlet pipe 232, a steering motor 233, a steering screw rod 234, a moving seat 235, a mounting seat 236 and a fixed seat 237. The fixed liquid outlet pipe 231 is arranged on the outer wall of the primary sedimentation tank 211 and is connected to the overflow port 1 213. A secondary sedimentation tank 5 is arranged on one side of the primary sedimentation tank 211. The fixed seat 237 is arranged on the secondary sedimentation tank 5. The steering liquid outlet pipe 232 is arranged on the secondary sedimentation tank 5 through the fixed seat 237. The upper end of the steering liquid outlet pipe 232 is open, and the end of the fixed liquid outlet pipe 231 away from the overflow port 1 213 is arranged toward the steering liquid outlet pipe 232.

[0050] Reference Figure 5 and Figure 6 The steering motor 233 and the mounting seat 236 are arranged on the side wall of the primary sedimentation tank 211 facing the secondary sedimentation tank 5, and are respectively located on both sides of the overflow port 213. One end of the steering screw 234 is connected to the output end of the steering motor 233, and the other end of the steering screw 234 is rotatably connected to the mounting seat 236, and the steering screw 234 is located below the fixed liquid outlet pipe 231. The moving seat 235 is threadedly sleeved on the steering screw 234, and a ball head connecting rod 238 is rotatably hinged on the moving seat 235. The other end of the ball head connecting rod 238 is rotatably connected to the steering liquid outlet pipe 232. The moving seat 235 drives the steering liquid outlet pipe 232 to turn through the ball head connecting rod 238. The bottom wall of the steering liquid outlet pipe 232 is provided with a connecting groove for the fixed seat 237 to move.

[0051] Reference Figure 6 and Figure 7 At least one partition plate 1 51 is vertically arranged in the side wall of the secondary sedimentation tank 5, and the two ends of the partition plate 1 51 in the length direction are respectively facing the primary sedimentation tank 211 or the tertiary sedimentation assembly 4, and the partition plate 1 51 evenly divides the secondary sedimentation tank 5 into multiple groups of secondary sedimentation assemblies 3. In this embodiment, the partition plate 1 51 is one piece, and the secondary sedimentation assemblies 3 have two groups.

[0052] Reference Figure 6 and Figure 7 Each set of secondary sedimentation components 3 includes a saturated sedimentation component 31, a cooling crystallization component 32 and a second liquid conveying component 33. Each saturated sedimentation component 31 includes a saturated sedimentation tank 311 formed by dividing the secondary sedimentation tank 5 by a partition plate 51. The cooling crystallization component 32 is arranged in the side wall of the saturated sedimentation tank 311, and the saturated sedimentation tank 311 is connected to the tertiary sedimentation component 4 through the second liquid conveying component 33.

[0053] Reference Figure 6 and Figure 7 Each group of cooling crystallization parts 32 includes a support frame 321, a crystallization frame 322, a lift 323 and a connecting rope 324. The support frame 321 is arranged on the saturated sedimentation tank 311, and the lift 323 is set above the saturated sedimentation tank 311 through the support frame 321. In this embodiment, the lift is a winch. The output end of the lift 323 is connected to the crystallization frame 322 through the connecting rope 324, and the crystallization frame 322 is located in the side wall of the saturated sedimentation tank 311. In this embodiment, the crystallization frame 322 is hollow inside and condensed water flows, and the crystallization frame 322 is respectively provided with a condensed water inlet pipe 325 and a condensed water outlet pipe 326.

[0054] Reference Figure 6 and Figure 7 The condensed water enters the crystallization rack 322 from the condensed water inlet pipe 325, and then circulates out from the condensed water outlet pipe 326. The temperature of the liquid in the saturated sedimentation tank 311 is reduced through the crystallization rack 322, thereby reducing the saturation of fluorosilicic acid and the like, promoting the precipitation of orthosilicic acid flocs or crystals. The temperature of the liquid near the crystallization rack 322 is relatively low, so that orthosilicic acid is precipitated and attached to the crystallization rack 322. When there are too many orthosilicic acid crystals on the crystallization rack 322, the elevator 323 drives the crystallization rack 322 to rise and move it above the saturated sedimentation tank 311, and the staff can clean the orthosilicic acid crystals on the crystallization rack 322, thereby ensuring the effect of cooling crystallization.

[0055] Reference Figure 7The second liquid conveying member 33 includes a first liquid pumping pipe 331, a connecting hose 332, a second liquid pumping pipe 333, a liquid pump 334, a secondary filter 335, a telescopic cylinder 336 and a connecting frame 337. The first liquid pumping pipe 331 is located in the side wall of the saturated sedimentation tank 311, the secondary filter 335 is arranged in the side wall of one end of the first liquid pumping pipe 331 in the length direction, the other end of the first liquid pumping pipe 331 in the length direction is connected to the connecting hose 332, the end of the connecting hose 332 away from the first liquid pumping pipe 331 is connected to the input end of the liquid pump 334, the liquid pump 334 is arranged at the top of the side wall of the saturated sedimentation tank 311, and the output end of the liquid pump 334 is connected to the third-stage sedimentation component 4 through the second liquid pumping pipe 333. The telescopic cylinder 336 is fixedly installed outside the side wall of the saturated sedimentation tank 311, and the output end of the telescopic cylinder 336 is connected to the connecting frame 337, and the end of the connecting frame 337 away from the telescopic cylinder 336 is connected to the liquid extraction pipe 331.

[0056] Reference Figure 7 The telescopic cylinder 336 contracts to drive the liquid extraction pipe 331 to descend and immerse it in the etching acid waste liquid. Under the action of the liquid extraction pump 334, the etching acid waste liquid after crystallization treatment enters the third-stage sedimentation component 4 through the liquid extraction pipe 331, the connecting hose 332, and the liquid extraction pipe 333; the secondary filter 335 allows the precipitated etching acid crystals to remain in the saturated sedimentation tank 311.

[0057] Reference Figure 8 The third-stage sedimentation assembly 4 includes a third-stage sedimentation tank 41. A partition plate 2 411 is arranged in the side wall of the third-stage sedimentation tank 41. The partition plate 2 411 divides the third-stage sedimentation tank 41 into two parts, an upper part and an lower part. A chemical sedimentation component 42 is arranged above the partition plate 2 411, and a solid-liquid separation component 2 43 is arranged below the partition plate 2 411.

[0058] Reference Figure 8 and Fig. 9 The chemical precipitation part 42 includes a chemical precipitation tank 421 formed by dividing the three-stage precipitation tank 41 by a second partition plate 411. The side wall of the chemical precipitation tank 421 close to the saturated precipitation tank 311 is connected to the second liquid extraction pipe 333. The side wall of the chemical precipitation tank 421 close to the precision filtering mechanism 1 is penetrated by a second overflow port 422. The chemical precipitation tank 421 is connected to the precision filtering mechanism 1 through the second overflow port 422. A three-stage filter screen 423 is provided in the side wall of the chemical precipitation tank 421 and located at the second overflow port 422. A second mounting ring is provided in the side wall of the chemical sedimentation tank 421 and around the second overflow port 422. A second mounting groove for mounting a third-stage filter 423 is provided in the side wall of the second mounting ring, and the upper end of the second mounting ring is open. The third-stage filter 423 is plugged into the second mounting ring through the second mounting groove, which facilitates the disassembly, cleaning or replacement of the second-stage filter 335.

[0059] Reference Figure 8The third-stage sedimentation assembly 4 further includes a stirring member 44, which includes a support plate 441, a stirring motor 442 and a stirring rod 443. The support plate 441 is disposed on the chemical sedimentation tank 421, and the stirring motor 442 is disposed on the support plate 441. The output end of the stirring motor 442 penetrates the support plate 441 to connect the stirring rod 443, and the stirring rod 443 is located in the side wall of the chemical sedimentation tank 421. Driven by the stirring motor 442, the stirring rod 443 stirs the liquid in the chemical sedimentation tank 421 to accelerate the reaction rate, thereby accelerating the circulation efficiency.

[0060] Reference Figure 8 and Fig. 9 , a sedimentation outlet 1 412 is vertically penetrated on the partition plate 2 411. The solid-liquid separation part 2 43 includes a separation tank 431 formed by dividing the three-stage sedimentation tank 41 by the partition plate 2 411, as well as a guide pipe 432, a control valve 433, a separation net 434, a sedimentation temporary storage box 435, a drainage pipe 438, and a drainage pump 439. The guide pipe 432 is connected to the chemical sedimentation tank 421 through the sedimentation outlet 1 412, and the control valve 433 is arranged at one end of the guide pipe 432 close to the partition plate 2 411. The separation net 434 is obliquely arranged in the side wall of the separation tank 431 and is located below the guide pipe 432. A sedimentation outlet 2 436 is penetrated on the side wall of the separation tank 431 and at the lower end of the separation net 434 in the vertical direction. The sedimentation temporary storage box 435 is arranged on the outer wall of the separation tank 431 and is connected to the separation tank 431 through the sedimentation outlet 2 436. A reflux channel is also provided between the temporary sediment storage box 435 and the separation tank 431, and the reflux channel is located on the side of the separation net 434 away from the second sedimentation outlet 436, and a reflux filter net 437 is provided in the side wall of the reflux channel. A drainage pipe 438 is provided between the separation tank 431 and the precision filtering mechanism 1, one end of the drainage pipe 438 is connected to the bottom of the side wall of the separation tank 431, and the other end of the drainage pipe 438 is connected to the input end of the drainage pump 439, and is connected to the precision filtering mechanism 1 through the drainage pump 439.

[0061] Reference Figure 8 and Fig. 9 When there is too much sediment deposited in the chemical sedimentation tank 421, the control valve 433 is opened, and the solid-liquid mixture flows into the separation tank 431 from the guide pipe 432. The solid is intercepted by the separation net 434 and falls into the sedimentation temporary storage box 435 along the inclined direction of the separation net 434. The liquid passes through the separation net 434 and enters the precision filtration mechanism 1 through the drainage pipe 438 under the action of the drainage pump 439; a small amount of liquid in the sedimentation temporary storage box 435 enters the separation tank 431 again through the reflux channel, and enters the precision filtration mechanism 1 through the drainage pipe 438, and the reflux filter net 437 intercepts the solid sediment in the sedimentation temporary storage box 435.

[0062] Reference Fig. 9 , the precision filtering mechanism 1 includes a filter barrel 11, a first high filter screen 12, a second high filter screen 13 and a high-efficiency filter element 14. A liquid inlet pipe 111 is connected between the filter barrel 11 and the overflow port 2 422, and a liquid inlet pipe 2 112 is connected between the filter barrel 11 and the drainage pump 439. The first high filter screen 12 and the second high filter screen 13 are sequentially arranged in the side wall of the filter barrel 11 in the height direction, and the second high filter screen 13 is located on the side of the first high filter screen 12 away from the liquid inlet pipe 1 111 and the liquid inlet pipe 2 112. A filter element mounting plate 141 is arranged in the side wall of the filter barrel 11 and on the side of the second high filter screen 13 away from the first high filter screen 12, and a plurality of high-efficiency filter elements 14 are fixedly mounted on the filter element mounting plate 141. In the present embodiment, the number of high-efficiency filter elements 14 is three, and the aperture sizes of the first high filter screen 12, the second high filter screen 13, and any high-efficiency filter element 14 decrease in sequence.

[0063] Reference Fig. 9 On the side wall of the filter barrel 11 and located on the filter element mounting plate 141, one end away from the second high filter screen 13 is connected with a liquid outlet pipe 113, and one end of the liquid outlet pipe 113 away from the filter barrel 11 is connected with an output pump 114, and the output end of the output pump 114 is connected with a liquid outlet pipe 2 115, and one end of the liquid outlet pipe 2 115 away from the output pump 114 is connected with an acid addition tank 6.

[0064] The implementation principle of an etching acid circulation system in the embodiment of the present application is:

[0065] The etching acid waste liquid enters the primary sedimentation tank 211 from the liquid inlet 212, and the waste solids such as glass fragments and orthosilicic acid crystals are gradually deposited at the bottom of the primary sedimentation tank 211. The conveying motor 222 drives the guide rod 223 and the conveying blade 224 to rotate, so that the waste solids are conveyed to the solid temporary storage box 225 along the conveying blade 224; the etching acid waste liquid passes through the primary filter screen 214, and flows into one of the saturated sedimentation tanks 311 from the overflow port 213 through the fixed liquid outlet pipe 231 and the steering liquid outlet pipe 232;

[0066] When the liquid in one of the saturated sedimentation tanks 311 reaches a certain amount, the steering motor 233 drives the steering screw 234 to rotate, and the moving seat 235 drives the steering liquid outlet pipe 232 to rotate through the ball head connecting rod 238, so that the steering liquid outlet pipe 232 is directed to the other saturated sedimentation tank 311, so that the etching acid waste liquid flows into the other saturated sedimentation tank 311;

[0067] Condensed water flows into the crystallization rack 322 from the water inlet, lowering the temperature of the liquid in the saturated sedimentation tank 311, causing the orthosilicic acid to precipitate and adhere to the crystallization rack 322. When there are too many crystals attached to the crystallization rack 322, the elevator 323 drives the crystallization rack 322 to rise, and the staff cleans the orthosilicic acid crystals on the crystallization rack 322.

[0068] The telescopic cylinder 336 drives the liquid extraction pipe 1 331 to immerse in the etching acid waste liquid through the connecting frame 337. Under the action of the liquid extraction pump 334, the saturated etching acid waste liquid passes through the secondary filter 335, the liquid extraction pipe 1 331, the connecting hose 332, and the liquid extraction pipe 2 333 into the chemical sedimentation tank 421; the liquid inflow or liquid outflow of the two saturated sedimentation tanks 311 is carried out alternately;

[0069] The staff adds the neutralizer into the chemical sedimentation tank 421, and the neutralizer reacts with the etching acid waste liquid to generate precipitation, which is continuously accumulated at the bottom of the chemical sedimentation tank 421; the liquid after the reaction enters the filter barrel 11 through the three-stage filter screen 423 and the liquid inlet pipe 111; when too much precipitation is accumulated at the bottom of the chemical sedimentation tank 421, the control valve 433 is opened, and the solid-liquid mixture falls into the separation tank 431 from the guide pipe 432, and the precipitation falls into the precipitation temporary storage box 435 along the inclined direction of the separation screen 434, and the liquid passes through the separation screen 434, and under the action of the drainage pump 439, enters the filter barrel 11 through the drainage pipe 438 and the liquid inlet pipe 2 112;

[0070] After the treated etching acid liquid enters the filter barrel 11, the etching acid liquid passes through the first high filter 12, the second high filter 13 and any high-efficiency filter element 14 in sequence, and then enters the acid adding tank 6 through the liquid outlet pipe 1 13 and the liquid outlet pipe 2 115 under the action of the output pump 114. The staff can add acid to the etching acid liquid in the acid adding tank 6, and the etching acid after acid addition can be used again to etch the glass panel.

[0071] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An etching acid circulation system, characterized in that: The invention comprises a sedimentation mechanism and a precision filtering mechanism (1), wherein the sedimentation mechanism comprises a primary sedimentation component (2), a plurality of secondary sedimentation components (3) and a tertiary sedimentation component (4) which are arranged in sequence, wherein one group of the secondary sedimentation components (3) is connected to the primary sedimentation component (2), and another group of the secondary sedimentation components (3) is connected to the tertiary sedimentation component (4), and the plurality of groups of the secondary sedimentation components (3) operate alternately; the precision filtering mechanism (1) is connected to the tertiary sedimentation component (4), the primary sedimentation component (2) comprises a primary sedimentation element (21), a solid-liquid separation element (22) and a liquid conveying element (23), and the The primary sedimentation element (21) comprises a primary sedimentation tank (211), the side walls of the primary sedimentation tank (211) are respectively provided with a liquid inlet (212) and an overflow port (213), a primary filter screen (214) is provided in the side wall of the primary sedimentation tank (211) and located at the overflow port (213); the liquid conveying element (23) is provided at the overflow port (213), and the primary sedimentation tank (211) is communicated with any of the secondary sedimentation components (3) through the liquid conveying element (23); the solid-liquid separation element (22) is provided in the side wall of the primary sedimentation tank (211). The liquid conveying member (23) comprises a fixed liquid outlet pipe (231), a steering liquid outlet pipe (232), a steering motor (233), a steering screw rod (234), a movable seat (235), a mounting seat (236) and a fixed seat (237); the steering motor (233) and the mounting seat (236) are both arranged on the outer wall of the primary sedimentation tank (211); one end of the steering screw rod (234) is connected to the output end of the steering motor (233); the other end of the steering screw rod (234) is rotatably connected to the mounting seat (236); the movable seat (235) is threadedly sleeved on the steering screw rod (234); one end of the diverting liquid outlet pipe (232) is connected to the movable seat (235), and the other end of the diverting liquid outlet pipe (232) faces any one of the secondary sedimentation components (3); the fixed seat (237) is arranged on any one of the secondary sedimentation components (3), and a connecting groove for sliding of the fixed seat (237) is arranged on the outer wall of the diverting liquid outlet pipe (232); one end of the fixed liquid outlet pipe (231) is connected to the overflow port 1 (213), and the other end of the fixed liquid outlet pipe (231) is located above the fixed seat (237) and is connected to the diverting liquid outlet pipe (232).

2. The etching acid circulation system according to claim 1, characterized in that: The solid-liquid separation element (22) comprises a solid conveying pipe (221), a conveying motor (222), a guide rod (223), a conveying blade (224) and a solid temporary storage box (225); the solid temporary storage box (225) is arranged on one side of the primary sedimentation tank (211); one end of the solid conveying pipe (221) is connected to the primary sedimentation tank (211); one end of the solid conveying pipe (221) away from the primary sedimentation tank (211) is connected to the solid temporary storage box (225) and is higher than the overflow port (213) in the height direction; the conveying motor (222) is arranged on the solid conveying pipe (221); the guide rod (223) is rotatably arranged in the side wall of the solid conveying pipe (221); one end of the guide rod (223) is connected to the output end of the conveying motor (222); and the conveying blade (224) is arranged on the guide rod (223).

3. The etching acid circulation system according to claim 2, characterized in that: Each group of the secondary sedimentation components (3) comprises a saturated sedimentation component (31), a cooling crystallization component (32) and a second liquid conveying component (33); the saturated sedimentation component (31) comprises a saturated sedimentation tank (311), and each of the saturated sedimentation tanks (311) is sequentially connected and arranged; the cooling crystallization component (32) is arranged in the side wall of the saturated sedimentation tank (311); the second liquid conveying component (33) is arranged on the side wall of the saturated sedimentation tank (311) close to the third sedimentation component (4); the saturated sedimentation tank (311) is communicated with the third sedimentation component (4) through the second liquid conveying component (33).

4. The etching acid circulation system according to claim 3, characterized in that: Each group of the cooling crystallization parts (32) includes a crystallization frame (322), a support frame (321), an elevator (323) and a connecting rope (324); the elevator (323) is arranged above the saturated sedimentation tank (311) through the support frame (321); the output end of the elevator (323) is connected to the crystallization frame (322) through the connecting rope (324); and the crystallization frame (322) is located inside the side wall of the saturated sedimentation tank (311).

5. The etching acid circulation system according to claim 3, characterized in that: The second liquid conveying member (33) comprises a first liquid extraction pipe (331), a connecting hose (332), a second liquid extraction pipe (333), a liquid extraction pump (334) and a telescopic cylinder (336); the liquid extraction pump (334) is arranged on the saturated sedimentation tank (311) and is located at one end of the saturated sedimentation tank (311) close to the third-stage sedimentation assembly (4); one end of the second liquid extraction pipe (333) is connected to the liquid extraction pump (334), and the other end of the second liquid extraction pipe (333) is connected to the third-stage sedimentation assembly (4); the liquid extraction pump The end of the second liquid extraction pipe (334) away from the second liquid extraction pipe (333) is connected to the first liquid extraction pipe (331) through the connecting hose (332); the end of the first liquid extraction pipe (331) away from the connecting hose (332) is provided with a secondary filter (335); the telescopic cylinder (336) is arranged on the saturated sedimentation tank (311), and the first liquid extraction pipe (331) is provided with a connecting frame (337); the end of the connecting frame (337) away from the first liquid extraction pipe (331) is connected to the output end of the telescopic cylinder (336).

6. The etching acid circulation system according to claim 5, characterized in that: The three-stage sedimentation assembly (4) comprises a chemical sedimentation element (42), a stirring element (44) and a second solid-liquid separation element (43); the chemical sedimentation element (42) comprises a chemical sedimentation tank (421); one side of the chemical sedimentation tank (421) is connected to any one of the second liquid extraction pipes (333); the stirring element (44) comprises a stirring motor (442) and a stirring rod (443); the stirring motor (442) is arranged on the chemical sedimentation tank (421); the stirring rod (443) is connected to the output end of the stirring motor (442); and the stirring rod (443) is located at the chemical sedimentation tank (421). The chemical sedimentation tank (421) is provided with a second overflow port (422) on the side wall, and the chemical sedimentation tank (421) is connected to the precision filtering mechanism (1) through the second overflow port (422); a third-stage filter screen (423) is provided in the side wall of the chemical sedimentation tank (421) and located at the second overflow port (422); the bottom wall of the chemical sedimentation tank (421) is provided with a first sedimentation outlet (412), and the chemical sedimentation tank (421) is connected to the second solid-liquid separation element (43) through the first sedimentation outlet (412).

7. The etching acid circulation system according to claim 6, characterized in that: The second solid-liquid separation element (43) comprises a separation tank (431), a guide pipe (432), a control valve (433), a separation net (434), a drainage pipe (438) and a drainage pump (439); the separation tank (431) is provided below the chemical sedimentation tank (421); the guide pipe (432) is connected to the chemical sedimentation tank (421) through the first sedimentation outlet (412); the control valve (433) is arranged at one end of the guide pipe (432) close to the first sedimentation outlet (412); a second sedimentation outlet (436) is provided through the side wall of the separation tank (431); a second sedimentation outlet (436) is provided on the outer side wall of the separation tank (431) and is located at the second sedimentation outlet (412); A sedimentation temporary storage box (435) is provided at the separation tank (431) at the bottom of the separation tank (431), the separation net (434) is provided in the side wall of the separation tank (431), and the separation net (434) is inclined toward the second sedimentation outlet (436); a reflux channel is provided between the end of the sedimentation temporary storage box (435) away from the second sedimentation outlet (436) and the separation tank (431), and a reflux filter net (437) is provided in the side wall of the reflux channel; one end of the drainage pipe (438) is connected to the end of the separation tank (431) away from the guide pipe (432), and the other end of the drainage pipe (438) is connected to the precision filtering mechanism (1) through the drainage pump (439).

8. The etching acid circulation system according to claim 7, characterized in that: The precision filtering mechanism (1) comprises a filter barrel (11), a first high-filter screen (12), a second high-filter screen (13) and a high-efficiency filter element (14); a first liquid inlet pipe (111) is connected between the filter barrel (11) and the second overflow port (422); a second liquid inlet pipe (112) is connected between the filter barrel (11) and the drainage pump (439); the first high-filter screen (12), the second high-filter screen (13) and the high-efficiency filter element (14) are sequentially arranged in the side wall of the filter barrel (11), and are all located on the same side of the first liquid inlet pipe (111) and the second liquid inlet pipe (112).

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