Method for deep removal of EDTA-Ca from solutions and device therefor

Abstract

The application provides a method and device for deeply removing EDTA-Ca in a solution. The method for deeply removing EDTA-Ca in the solution comprises the following steps: S1, mixing and dispersing soluble iron salt and soluble copper salt in deionized water according to a certain molar ratio to obtain solution A. The method and device for deeply removing EDTA-Ca in the solution provided by the application can deeply remove EDTA-Ca in the solution by using a copper ferrite (CuFe2O4) and hydrogen peroxide compound system, without additional light, heating or adding other reagents. The system itself can generate free radicals with strong oxidizing ability, can realize efficient oxidative breakage, and can decompose the complex into small molecules such as CO2, H2O and NH3. The removal rate is fast, and the removal rate of EDTA-Ca can reach more than 99% within 0.5 hours at room temperature. The used material can be easily recycled from the solution by using the strong magnetic property of copper ferrite, and secondary pollution to the environment can be effectively avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of industrial wastewater treatment, in particular to a method and device for deep removal of EDTA-Ca in solution. BACKGROUND

[0002] In the process of preparing lithium carbonate by extracting lithium from lepidolite in the lithium battery industry, the presence of divalent metal ions (such as Ca2+, Mg2+ and the like) has a great hidden danger to the performance of the lithium carbonate product, and needs to be removed before the lithium precipitation process. At present, the method for removing divalent metal ions in the lepidolite leaching solution purification and impurity removal process in the lithium salt industry is mostly EDTA complexation masking method, that is, by adding EDTA complexing agent, the complexing agent reacts with Ca2+ to form a complex (EDTA-Ca), and the soluble complex is retained in the solution and does not participate in chemical precipitation.

[0003] However, the complex will affect the product crystallization process, and the final product will have poor flowability. In the subsequent production and recovery of lithium precipitation mother liquor process, when ion exchange resin is used to remove calcium and magnesium ions, the organic matter causes resin pollution or aging, the service life is short, the regeneration exchange cost of the resin is high, the concentration of calcium and magnesium and other divalent metal ions cannot be effectively reduced, the organic complex exists in the production circulation system, affects the recycling, the complex is also entrained into the finished product, causes the product to be dark, causes customer complaints and rework, and increases the time cost.

[0004] Therefore, it is necessary to provide a method and device for deep removal of EDTA-Ca in solution to solve the above technical problems. SUMMARY

[0005] The present application provides a method and device for deep removal of EDTA-Ca in solution, which solves the problem that the organic complex exists in the production circulation system, affects the recycling, and the complex is also entrained into the finished product, causing the product to be dark.

[0006] To solve the above technical problems, the method for deep removal of EDTA-Ca in solution provided by the present application comprises the following steps:

[0007] S1, mixing and dispersing soluble iron salt and soluble copper salt in deionized water in a certain molar ratio to obtain solution A;

[0008] S2, adding a precipitating agent to solution A, adjusting the pH of solution A, and heating and stirring for a period of time, and then performing aging reaction;

[0009] S3, after filtration, washing the obtained precipitate with deionized water and anhydrous ethanol to neutral, drying and grinding to 200 mesh to obtain copper ferrite;

[0010] S4, copper ferrite and hydrogen peroxide are added into the EDTA-Ca solution, and stirring reaction is carried out.

[0011] Preferably, the soluble iron salt is one or more combinations of ferric chloride, ferric sulfate, ferric nitrate, and the soluble copper salt is one or more combinations of cupric chloride, cupric sulfate, cupric nitrate.

[0012] Preferably, the mass ratio of copper ferrite to hydrogen peroxide in S4 is (1-10):(10-100).

[0013] Preferably, the copper ferrite and hydrogen peroxide are directly added into the EDTA-Ca solution, the reaction time is 0.1-10h, and the dosage of the copper ferrite is 0.5-10g / L based on the volume of the EDTA-Ca solution.

[0014] Preferably, the molar ratio of the soluble iron salt to the soluble copper salt is (2-10):(1-5).

[0015] Preferably, the precipitant comprises at least one of NaOH, triethanolamine and ammonia water, the pH of the solution A is adjusted to 7-14, the heating temperature of the solution A is 20-90℃, the stirring time is 0.5-4h, the aging temperature is 20-90℃, and the aging time is 4-24h.

[0016] The application also provides a device for deeply removing EDTA-Ca in a solution, which comprises a shell, a reaction barrel is arranged in the shell, a discharge chute is arranged at the top of the reaction barrel, a feeding chute is arranged at the bottom of the reaction barrel, a stirring rod is rotatably connected to the inside of the reaction barrel, a mounting frame is arranged at the top of the shell, a driving piece is arranged at the top of the mounting frame, a sleeve rod is arranged on the output shaft of the driving piece, a sliding rod is slidably connected to the inside of the sleeve rod, a pushing piece is arranged on the mounting frame, a connecting plate is fixedly connected to the bottom of the pushing piece, the sliding rod is rotatably connected with the connecting plate, the sliding rod penetrates through the stirring rod and is sleeved with the stirring rod, a locking assembly is arranged between the sliding rod and the stirring rod, a sealing plate is rotatably connected to the outer surface of the sliding rod, movable plates are fixedly connected to the two sides of the sealing plate, limiting pieces are arranged on the movable plates, one end of the limiting pieces is slidably connected to the side wall of the shell, blocking assemblies are arranged on the two sides of the shell, opening grooves are arranged on the two sides of the shell, the blocking assemblies are used for blocking the opening grooves, a filtering assembly is arranged on the bottom of the inner wall of the shell, and a docking assembly is arranged on the side of the sliding rod opposite to the filtering assembly.

[0017] Preferably, the locking assembly comprises at least one locking block and a locking groove, the locking block is fixedly connected to the outer surface of the sliding rod, the locking groove is arranged on the inner surface of the sleeve rod, and the locking block is inserted into the locking groove to realize the mutual locking of the sliding rod and the stirring rod.

[0018] Preferably, the plugging assembly comprises a fixed frame, a sliding block is slidably connected to the inside of the fixed frame, a spring is arranged between the sliding block and the side wall of the fixed frame, a plugging plate is fixedly connected to the bottom of the sliding block, an auxiliary rod is fixedly connected to one side of the sliding block, one end of the auxiliary rod penetrates through the shell and extends into the inside of the shell, and a triangular inclined block is fixedly connected to the end of the auxiliary rod extending into the inside of the shell.

[0019] Preferably, the filtering assembly comprises a rotating rod, a filtering plate is fixedly connected to the top of the rotating rod, the filtering plate is umbrella-shaped, and the outer surface of the filtering plate is close to the inner surface of the shell; the butt joint assembly comprises a butt joint block and a butt joint groove, the butt joint block is fixedly connected to the bottom of the sealing plate, the butt joint groove is fixedly connected to the top of the filtering plate, and the front surface of the shell is provided with a liquid discharge port.

[0020] Compared with the related art, the method and device for deeply removing EDTA-Ca in a solution provided by the application have the following beneficial effects:

[0021] The application provides a method and device for deeply removing EDTA-Ca in a solution, and the application adopts a copper ferrite (CuFe2O4) and hydrogen peroxide composite system to deeply remove EDTA-Ca in a solution, without the need of additional light, heating or the addition of other reagents, the system itself can generate free radicals with strong oxidation capacity, high-efficiency oxidation can be realized, and the complex can be decomposed into small molecules such as CO2, H2O and NH3; the removal rate is fast, and the removal rate of EDTA-Ca can reach more than 99% within 0.5 h at room temperature; the strong magnetic property of copper ferrite is utilized, the used material is easily recycled from the solution by a magnet, and secondary pollution to the environment is effectively avoided. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 A flowchart of a preferred embodiment of the method for deeply removing EDTA-Ca in a solution provided by the application is shown in the figure;

[0023] Figure 2 A structural diagram of a preferred embodiment of the device for deeply removing EDTA-Ca in a solution provided by the application is shown in the figure;

[0024] Figure 3 A sectional view of the shell is shown in the figure; Figure 2 A sectional view of the shell is shown in the figure;

[0025] Figure 4 As shown in the enlarged view of A part of FIG. 1; Figure 3 As shown in the enlarged view of A part of FIG. 1;

[0026] Figure 5 As shown in the enlarged view of A part of FIG. 1; Figure 2 As shown in the sleeve connection diagram of the stirring rod and the sliding rod;

[0027] Figure 6 As shown in the initial stirring state diagram of the device for deeply removing EDTA-Ca in solution provided by the application;

[0028] Figure 7 As shown in the solid-liquid separation state diagram of the device for deeply removing EDTA-Ca in solution provided by the application;

[0029] Figure 8 As shown in the precipitation and discharge state diagram of the device for deeply removing EDTA-Ca in solution provided by the application;

[0030] Figure 9 As shown in the structure diagram of another embodiment of the plugging assembly. Figure 4 As shown in the structure diagram of another embodiment of the plugging assembly.

[0031] In the drawings: 1, outer shell, 2, reaction bucket, 3, feeding groove, 4, stirring rod, 5, mounting frame, 6, driving piece, 7, sleeve rod, 8, sliding rod, 9, pushing piece, 10, connecting plate, 11, locking assembly, 111, locking block, 112, locking groove, 12, sealing plate, 13, moving plate, 14, limiting piece, 15, plugging assembly, 151, fixed frame, 152, sliding block, 153, spring, 154, plugging plate, 155, auxiliary rod, 156, triangular inclined block, 16, opening groove, 17, filtering assembly, 171, rotating rod, 172, filtering plate, 18, butt joint assembly, 181, butt joint block, 182, butt joint groove, 19, liquid discharge port, 20, discharging groove, 21, shielding assembly, 211, fixed block, 212, moving block, 213, elastic piece, 214, mounting rod, 215, shielding plate, 216, auxiliary plate. DETAILED DESCRIPTION

[0032] The application will be further described below in conjunction with the drawings and embodiments. Embodiment one

[0033] Please refer to Figure 1 , wherein, Figure 1 As shown in the flow diagram of a preferred embodiment of the method for deeply removing EDTA-Ca in solution provided by the application.

[0034] The application provides a method for deeply removing EDTA-Ca in solution, comprising the following steps:

[0035] S1, a soluble iron salt, a soluble copper salt are mixed and dispersed in deionized water according to a molar ratio of 2:1 to obtain solution A; the soluble iron salt is one or more of ferric chloride, ferric sulfate, ferric nitrate; the soluble copper salt is one or more of copper chloride, copper sulfate, copper nitrate;

[0036] S2, a sodium hydroxide solution is added to solution A, the pH is adjusted to 10, and after stirring at 25°C for 1 h, the reaction is aged at 25°C for 4 h;

[0037] S3, after filtration, the obtained precipitate is washed with deionized water and anhydrous ethanol until neutral, dried and ground to 200 mesh to obtain copper ferrite;

[0038] S4, copper ferrite and hydrogen peroxide are added to an EDTA-Ca containing solution and stirred for reaction; the addition amount of copper ferrite is 2 g / L based on the volume of the EDTA-Ca containing solution, and the mass ratio of copper ferrite to hydrogen peroxide is 2:11.2; the stirring time is 0.5 h. Example two

[0039] Compared with example one, the difference of this example two is that after adding copper ferrite and hydrogen peroxide to the EDTA-Ca containing solution, the stirring reaction time is 0.1 h, and other conditions remain unchanged.

[0040] Example three

[0041] Compared with example one, the difference of this example three is that the mass ratio of copper ferrite to hydrogen peroxide is 2:0, and other conditions remain unchanged. Example four

[0042] Compared with example one, the difference of this example four is that the addition amount of copper ferrite is 0 g / L, the mass ratio of copper ferrite to hydrogen peroxide is 0:11.2, and other conditions remain unchanged. Example five

[0043] Compared with example one, the difference of this example five is that the addition amount of copper ferrite is 1 g / L, the mass ratio of copper ferrite to hydrogen peroxide is 1:11.2, and other conditions remain unchanged. Example six

[0044] Compared with example one, the difference of this example six is that the addition amount of copper ferrite is 3 g / L, the mass ratio of copper ferrite to hydrogen peroxide is 3:11.2, and other conditions remain unchanged. Example seven

[0045] Compared with example one, the difference of this example seven is that the mass ratio of copper ferrite to hydrogen peroxide is 2:22.4, and other conditions remain unchanged. Example eight

[0046] The embodiment eight is compared with the embodiment one, the difference is that the mass ratio of copper ferrite and hydrogen peroxide is 2:33.6, and other conditions remain unchanged.

[0047] Table 1 shows the treatment effect of EDTA-containing solution in different embodiments:

[0048] From table 1, it can be seen that

[0049] The application uses copper ferrite and hydrogen peroxide to form a composite system, which shows a significant removal effect on EDTA-Ca in the solution, and more than 99% of EDTA-Ca can be removed in 0.5h. When the mass ratio of copper ferrite and hydrogen peroxide is changed, the ability to remove EDTA-Ca in the solution is almost unchanged; when the stirring reaction time is reduced, the removal rate slightly decreases due to insufficient reaction time. When copper ferrite or hydrogen peroxide is added alone, the effective removal effect cannot be achieved, which highlights the importance of the synergistic effect between copper ferrite and hydrogen peroxide in improving the efficiency of removing EDTA-Ca.

[0050] Compared with the related art, the method for deeply removing EDTA-Ca in the solution provided by the application has the following beneficial effects:

[0051] The application uses copper ferrite (CuFe2O4) and hydrogen peroxide to form a composite system to deeply remove EDTA-Ca in the solution, without the need for additional light, heating or adding other reagents. The system itself can generate free radicals with strong oxidation ability, which can realize efficient oxidation and break the complex into small molecules such as CO2, H2O and NH3. The removal rate is fast, and the removal rate of EDTA-Ca can reach more than 99% in 0.5h at room temperature. The strong magnetic properties of copper ferrite are used to easily recover the used material from the solution by a magnet, effectively avoiding secondary pollution to the environment. Embodiment nine

[0052] Please refer to Figures 2-9 , wherein, Figure 2 is a structural schematic diagram of a preferred embodiment of the device for deeply removing EDTA-Ca in the solution provided by the application; Figure 3 is Figure 2 is a cross-sectional schematic diagram of the shell shown; Figure 4 is Figure 3 is an enlarged schematic diagram of part A shown; Figure 5 is Figure 2 is a sleeve connection diagram of the stirring rod and the sliding rod shown; Figure 6 is a diagram of the initial stirring state of the device for deeply removing EDTA-Ca in the solution provided by the application; Figure 7 is a diagram of the solid-liquid separation state of the device for deeply removing EDTA-Ca in the solution provided by the application; Figure 8The precipitation discharge state diagram of the device for deeply removing EDTA-Ca in solution provided by the application; Figure 9 For Figure 4 The structural schematic diagram of another embodiment of the plugging assembly.

[0053] The application further provides a device for deeply removing EDTA-Ca in solution, which comprises an outer shell 1, a reaction bucket 2 is arranged in the inner part of the outer shell 1, a feeding groove 3 is arranged at the top of the reaction bucket 2, a discharging groove 20 is arranged at the bottom of the reaction bucket, a stirring rod 4 is rotatably connected to the inner part of the reaction bucket 2, a mounting rack 5 is arranged at the top of the outer shell 1, a driving piece 6 is arranged at the top of the mounting rack 5, a sleeve rod 7 is arranged on the output shaft of the driving piece 6, a sliding rod 8 is slidably connected to the inner part of the sleeve rod 7, a pushing piece 9 is arranged on the mounting rack 5, a connecting plate 10 is fixedly connected to the bottom of the pushing piece 9, the sliding rod 8 is rotatably connected with the connecting plate 10, the sliding rod 8 penetrates through the stirring rod 4 and is sleeved with the stirring rod 4, a locking assembly 11 is arranged between the sliding rod 8 and the stirring rod 4, a sealing plate 12 is rotatably connected to the outer surface of the sliding rod 8, moving plates 13 are fixedly connected to the two sides of the sealing plate 12, limiting pieces 14 are arranged on the moving plates 13, one end of the limiting pieces 14 is slidably connected to the side wall of the outer shell 1, plugging assemblies 15 are arranged on the two sides of the outer shell 1, opening grooves 16 are arranged on the two sides of the outer shell 1, the plugging assemblies 15 are used for plugging the opening grooves 16, a filtering assembly 17 is arranged at the bottom of the inner wall of the outer shell 1, a butt joint assembly 18 is arranged on the side of the sliding rod 8 opposite to the filtering assembly 17, and a liquid discharge port 19 is arranged on the front face of the outer shell 1.

[0054] It can be understood that, in other embodiments, the driving piece 6 can also be a motor, a pneumatic motor, a hydraulic motor or the like, as long as it can drive the sleeve rod 7 to rotate;

[0055] It can be understood that, in other embodiments, the pushing piece 9 can also be a gas pushing rod, a pneumatic cylinder, a hydraulic rod or the like, as long as it can drive the connecting plate 10 to move linearly upwards or downwards;

[0056] In the embodiment, one end of the limiting piece 14 is fixed to the moving plate 13, and the other end is slidably connected to the side wall of the outer shell 1, so that the sliding rod 8 is prevented from rotating and driving the sealing plate 12 to rotate, and the moving plate 13 is prevented from moving, thereby ensuring that the moving plate 13 can touch the plugging assembly 15 when the moving plate 13 moves downwards.

[0057] In the embodiment, a cover is detachably arranged at the top of the feeding groove 3, so as to prevent materials from splashing during stirring.

[0058] In the embodiment, the inner wall of the reaction barrel 2 is also provided with an electric heating wire for heating during stirring reaction.

[0059] In the embodiment, the sealing plate 12 is provided with a sealing gasket on the opposite side of the discharge groove 20, which can ensure the sealing property when the sealing plate 12 is tightly attached to the discharge groove 20.

[0060] In the embodiment, the application has three working states, which are as follows:

[0061] Please refer to Figure 6 , which is the stirring state (i.e. initial state). In this state, the material is sent into the inside of the reaction barrel 2 through the feeding groove 3, the driving member 6 is started to rotate the sleeve rod 7, and then the sliding rod 8 is rotated. Due to the locking of the locking assembly 11, the stirring rod 4 rotates with the sliding rod 8, so that the material can be stirred and reacted, and the reaction temperature can be controlled by the electric heating wire.

[0062] Please refer to Figure 7 , which is the solid-liquid separation state. When the stirring reaction is finished, the extension of the pushing member 9 drives the connecting plate 10 to move downward, and then the sliding rod 8 moves downward, which drives the sealing plate 12 to move downward, so that the discharge groove 20 is opened, and the solution is discharged downward. The solution is subjected to solid-liquid separation through the filter plate 172, the filtered liquid is discharged through the liquid discharge port 19, and the sediment is left above the filter plate 172.

[0063] Please refer to Figure 8 , which is the sediment discharge state. When the solid-liquid separation is finished, the further extension of the pushing member 9 drives the connecting plate 10 to continue moving downward, and then the sliding rod 8 moves downward, which drives the sealing plate 12 to continue moving downward, drives the moving plate 13 to move downward, and then opens the blocking assembly 15, so that the opening groove 16 is opened, and the butt joint block 181 moves downward and is butt jointed with the butt joint groove 182. Then, with the rotation of the driving member 6, the sliding rod 8 rotates to drive the butt joint block 181 to rotate, so that the butt joint groove 182 rotates to drive the filter plate 172 to rotate, and the sediment is discharged from the opening groove 16 through the centrifugal force.

[0064] Please refer to Figure 5 , the locking assembly 11 includes at least one locking block 111 and a locking groove 112. The locking block 111 is fixedly connected to the outer surface of the sliding rod 8, the locking groove 112 is opened in the inner surface of the sleeve rod 7, and the locking block 111 is inserted into the locking groove 112 to realize the mutual locking of the sliding rod 8 and the stirring rod 4.

[0065] In the embodiment, the locking block 111 and the locking groove 112 are matched, when the locking block 111 and the locking groove 112 are inserted, the stirring rod 4 is relatively stationary with the sliding rod 8, when the driving part 6 drives the sleeve rod 7 to rotate, the sliding rod 8 is rotated, and then the stirring rod 4 is rotated, when the sliding rod 8 is moved downward, the locking block 111 and the locking groove 112 are separated, the rotation of the sliding rod 8 does not affect the stirring rod 4, therefore, when the sliding rod 8 drives the filtering assembly 17 to rotate, the stirring rod 4 is not rotated, and the power is not reduced.

[0066] In an embodiment, a magnetic attraction structure is further arranged between the locking block 111 and the locking groove 112, the magnetic attraction structure comprises a magnetic attraction block and an attracted block, the magnetic attraction block is installed in the locking groove 112, and the attracted block is installed at the top of the locking block 111, when the locking block 111 is at the slot of the locking groove 112, the magnetic attraction block can attract the attracted block, so that the two are more easily positioned and connected.

[0067] Please refer to Figure 4 , the sealing assembly 15 comprises a fixed frame 151, a sliding block 152 is slidably connected in the fixed frame 151, a spring 153 is arranged between the sliding block 152 and the side wall of the fixed frame 151, a sealing plate 154 is fixedly connected to the bottom of the sliding block 152, an auxiliary rod 155 is fixedly connected to one side of the sliding block 152, one end of the auxiliary rod 155 penetrates through the shell 1 and extends into the shell 1, and a triangular inclined block 156 is fixedly connected to the end of the auxiliary rod 155 extending into the shell 1.

[0068] In the embodiment, the sealing plate 154 and the opposite side of the shell 1 are provided with sealing pads, so as to ensure the sealing performance when the sealing plate 154 tightly seals the opening groove 16.

[0069] In the embodiment, when the moving plate 13 moves downward, it gradually contacts the triangular inclined block 156, when the moving plate 13 continues to move downward after contacting the inclined surface of the triangular inclined block 156, the triangular inclined block 156 is moved toward the auxiliary rod 155 by the force applied to the inclined surface of the triangular inclined block 156, and then the auxiliary rod 155 slides outwardly of the shell, and then the sealing plate 154 is separated from the opening groove 16 by the sliding block 152, so as to realize the discharging.

[0070] In the embodiment, when the sliding block 152 moves away from the auxiliary rod 155, the spring 153 is compressed, when the moving plate 13 is reset upwardly, the pressure on the triangular inclined block 156 is removed, at this time, the spring 153 is reset, and then the sliding block 152 moves toward the auxiliary rod 155, and then the sealing plate 154 seals the opening groove 16.

[0071] Please refer to Figure 4A limiting block is further arranged at the bottom of the inclined surface of the triangular inclined block 156, which extends out of the inclined surface of the triangular inclined block 156 and limits the movement of the moving plate 13 when the moving plate 13 slides on the inclined surface of the triangular inclined block 156, so as to ensure that the moving plate 13 will not be at the bottom of the triangular inclined block 156, thereby avoiding the situation that the moving plate 13 is stuck by the triangular inclined block 156.

[0072] Please refer to Figure 9 In another embodiment, the plugging assembly 15 can be replaced by a shielding assembly 21, which comprises a fixed block 211 and a moving block 212, and an elastic member 213 is arranged between the fixed block 211 and the moving block 212. The bottom of the moving block 212 is provided with a mounting rod 214, the bottom of the mounting rod 214 is provided with a shielding plate 215, the opening slot 16 is plugged by the shielding plate 215, one side of the mounting rod 214 is provided with an auxiliary plate 216, the auxiliary plate 216 penetrates through the shell 1 and extends into the inside of the shell 1, a slot is formed on the shell 1 for the up-and-down sliding of the auxiliary plate 216, and an adapter plate is arranged in the slot, which can ensure the up-and-down sliding of the auxiliary plate 216 and also can close the slot.

[0073] In use, when the moving plate 13 moves downward, the auxiliary plate 216 is contacted and moved downward, and then the mounting rod 214 is moved downward, and then the shielding plate 215 is moved downward, so as to open the opening slot 16 and discharge the material. When the moving plate 13 moves upward, no force is applied to the auxiliary plate 216, at this time, the elastic member 213 rebounds, drives the mounting rod 214 to move upward, and then the shielding plate 215 moves upward to plug the opening slot 16.

[0074] Please refer to Figure 3 The filtering assembly 17 comprises a rotating rod 171, the top of the rotating rod 171 is fixedly connected with a filtering plate 172, the filtering plate 172 is umbrella-shaped, and the outer surface of the filtering plate 172 is close to the inner surface of the shell 1. The docking assembly 18 comprises a docking block 181 and a docking slot 182, the docking block 181 is fixedly connected to the bottom end of the sliding rod 8, and the docking slot 182 is fixedly connected to the top of the filtering plate 172.

[0075] Please refer to Figure 3 The rotating rod 171 is rotatably connected to the bottom of the inner wall of the shell 1, the umbrella-shaped filtering plate 172 is fixed to the top of the rotating rod 171, the cutting surface from the axis to the outer edge of the filtering plate 172 is inclined, the filtering plate 172 can filter the sediment, and the sediment slides to both sides, and when the opening slot 16 is opened, the sediment can be discharged.

[0076] In the embodiment, at least one scraper is installed on the outer circular edge of the filter plate 172, and the outer wall of the scraper is tightly attached to the inner wall of the shell 1, so that the scraper can be driven to move in a circular motion when the filter plate 172 rotates, thereby scraping off the precipitate on the side wall of the shell 1.

[0077] In the embodiment, the butt joint block 181 is adapted to the butt joint groove 182, and the cross-sectional shape of the butt joint block 181 is any shape other than a cylindrical shape, so that the butt joint block 181 can be clamped to the butt joint groove 182 after butt joint, and the rotation of the butt joint block 181 can drive the rotation of the butt joint groove 182, thereby controlling the rotation of the filter plate 172.

[0078] Please refer again to Figure 3 The butt joint block 181 and the butt joint groove 182 are in the same straight line, and the butt joint groove 182 and the filter plate 172 are in the same axis.

[0079] The working principle of the device for deeply removing EDTA-Ca in a solution provided by the application is as follows:

[0080] The materials are added from the feeding groove 3 into the reaction barrel 2, and then the sleeve rod 7 is driven to rotate by the driving member 6, so that the stirring rod 4 is driven to rotate by the sliding rod 8, and the stirring reaction is carried out, then the connecting plate 10 is driven to move downward by the pushing of the pushing member 9, and then the sliding rod 8 is driven to move downward, and then the sealing plate 12 is driven to move downward, so that the discharge groove 20 is opened, and the solution flows down and is filtered by the filtering assembly 17, the filtrate is discharged through the liquid outlet 19, and the precipitate is left above the filtering assembly 17, and with the continuous pushing of the pushing member 9, the sliding rod 8 is continuously driven to move downward, and then the sealing plate 12 is continuously driven to move downward, and the moving plate 13 is driven to move downward to unblock the blocking assembly 15, so that the opening groove 16 is opened, and with the downward movement of the sliding rod 8, the butt joint assembly 18 is butt jointed, and in cooperation with the rotation of the driving member 6, the filtering assembly 17 can be driven to rotate, so that the precipitate is discharged by centrifugal force.

[0081] Compared with the related art, the device for deeply removing EDTA-Ca in a solution provided by the application has the following beneficial effects:

[0082] The application drives the sleeve rod 7 to rotate through the driving piece 6, so that the sliding rod 8 drives the stirring rod 4 to rotate, stirring reaction is carried out, then the connecting plate 10 is driven to move downwards through the pushing of the pushing piece 9, so that the discharge slot 20 is indirectly opened, the solution is filtered through the filtering assembly 17 after discharge, solid-liquid separation is facilitated, and with the continuous pushing of the pushing piece 9, the opening slot 16 is indirectly opened, and the filtering assembly 17 is driven to rotate, so that the precipitate is discharged through centrifugal force, the discharge of the precipitate is facilitated, the filtering effect of the filtering assembly 17 is avoided from being affected, the labor amount of workers is reduced, the sliding plate 10 is linearly moved through the pushing of the pushing piece 9, the switching between three states can be realized, the operation is simple and fast, and the flexibility of use is increased.

[0083] The above description is only an embodiment of the application, and does not limit the patent range of the application, and any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields, which is based on the content of the specification and drawings of the application, is also included in the patent protection range of the application.

Claims

1. A device for deeply removing EDTA-Ca from a solution, characterized in that: Including the shell; The top of described outer shell is provided with a feed chute, and the bottom of described outer shell is provided with a discharge chute, and the interior of described outer shell is rotatably connected with a stirring rod, and a mounting frame is mounted on the top of described mounting frame, and a driving member is mounted on the top of described mounting frame, and the output shaft of described driving member is provided with a sleeve rod, and the sliding rod is slidably connected to the sliding rod of described sleeve rod, and a pushing member is installed on the mounting frame, and the bottom of described pushing member is fixedly connected with the connecting plate, and the sliding rod is rotatably connected with the connecting plate, and the sliding rod passes through the stirring rod and is sleeved with the stirring rod, and a locking assembly is provided between the sliding rod and the stirring rod, and the outer surface of the sliding rod is rotatably connected with the sealing plate, and both sides of the sealing plate are fixedly connected with the movable plate, and a limiting member is installed on the movable plate, and one end of the limiting member is slidably connected to the side wall of the shell, and both sides of described outer shell are provided with a blocking assembly, and both sides of described outer shell are provided with an open groove, and the blocking assembly is used for blocking the open groove, and the bottom of described inner wall of described outer shell is provided with a filter assembly, and the side of described sliding rod opposite to the filter assembly is provided with a docking assembly; The locking assembly includes at least one locking block and a locking groove, wherein the locking block is fixedly connected to the outer surface of the sliding rod, the locking groove is formed on the inner surface of the sleeve rod, and the locking block is inserted into the locking groove to achieve mutual locking between the sliding rod and the stirring rod; The blocking assembly includes a fixed frame, a sliding block is slidably connected to the interior of the fixed frame, a spring is provided between the sliding block and the side wall of the fixed frame, a blocking plate is fixedly connected to the bottom of the sliding block, an auxiliary rod is fixedly connected to one side of the sliding block, one end of the auxiliary rod passes through the shell and extends to the interior of the shell, and the end of the auxiliary rod extending to the interior of the shell is fixedly connected to a triangular oblique block; The filter assembly includes a rotating rod, the top of which is fixedly connected to a filter plate, the filter plate is umbrella-shaped, and the outer surface of the filter plate is tightly attached to the inner surface of the shell; the docking assembly includes a docking block and a docking groove, the docking block is fixedly connected to the bottom of the sealing plate, the docking groove is fixedly connected to the top of the filter plate, and a drain port is provided on the front of the shell.

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