Multi-stage treatment equipment and process for the reaction of a boric acid compound

Abstract

The present invention provides a multi-stage treatment device and process for the reaction of boric acid compounds, which relates to the technical field of boric acid preparation. It includes a metal ion precipitation kettle and an acid-base adjustment kettle. A precipitation mechanism for facilitating the removal of metal ions from boric acid wastewater is provided on the metal ion precipitation kettle. An adjustment mechanism for facilitating the adjustment of the pH value of boric acid wastewater is provided on the acid-base adjustment kettle. A filtration mechanism for facilitating the transfer of boric acid waste liquid is provided on the acid-base adjustment kettle. The precipitation mechanism includes a first feed inlet and a first motor. The adjustment mechanism includes a second motor, a second feed inlet, and a pH value detector. The filtration mechanism includes a first sealing door, an L-shaped fixing rod, a third motor, a filter screen, and a movable rod. By setting the third motor, the threaded rod, the movable rod, and the cleaning brush in cooperation, the filter screen intercepts the possibly incompletely dissolved solid impurities, flocculants, etc. that may exist in the acid-base adjustment kettle, preventing these substances from entering the metal ion precipitation kettle.

Description

Technical Field

[0001] The present invention belongs to the technical field of boric acid preparation, and more specifically, particularly relates to a multi-stage treatment device and process for the reaction of boric acid compounds. Background Art

[0002] During the preparation of boric acid compounds, waste liquid and waste materials will inevitably be generated. For example, when preparing boric acid by reacting borax with acid, there will be remaining acid solution and salt solution generated after the reaction. If boric acid is extracted from ore, after the ore is treated by acid leaching and the like, acidic waste liquid containing impurity metal ions will be generated. Moreover, some mother liquors will also be generated during processes such as filtration and crystallization. These mother liquors may contain boric acid that is not completely crystallized, impurity ions, and substances such as acids or alkalis used to adjust the pH value. Therefore, in the production of boric acid compounds, it is necessary to recycle the waste materials of the reactants.

[0003] The Chinese patent publication number is: CN118164642B, a chemical waste liquid treatment device. This invention can concentrate the flocs accumulated on the top surface of the first filter screen through an aggregation column and a cleaning block, reducing the situation where a large amount of flocs cover the top surface of the first filter screen and cause the first filter screen to be blocked.

[0004] The existing treatment of boric acid compounds has the following drawbacks:

[0005] 1. When treating the waste liquid of existing boric acid compounds, it is necessary to adjust the pH value before proceeding to the next step of treatment. When adjusting the pH value of the existing acid and alkali, generally after a period of temperature and stirring, the liquid is directly transferred, or after manually collecting and detecting the pH value of the waste liquid sample, the waste liquid is transferred and the next step of treatment is carried out. The above methods may cause the pH value to be not suitable for the next step of treatment and be transferred in advance, or the efficiency is low due to repeated detection, and then the best transfer time is missed, affecting the treatment efficiency of boric acid waste liquid;

[0006] 2. When treating the waste liquid of existing boric acid compounds, a cleaning mechanism is often set to clean the filter screen during liquid transfer. However, in actual use, this cleaning mechanism needs to be manually started separately. In the treatment of boric acid waste liquid, the equipment coordination is low and manual intervention is required. And manual intervention has certain errors or delays, resulting in low stability of the coordinated operation of the multi-stage treatment equipment.

[0007] In view of this, research and improvement are carried out on the existing structure and deficiencies, and a multi-stage treatment device and process for the reaction of boric acid compounds are provided, with the expectation of achieving a more practical value. Summary of the Invention

[0008] To solve the above technical problems, the present invention provides a multi-stage treatment device and process for the reaction of boric acid compounds to solve the above problems.

[0009] A multi-stage treatment device for the reaction of boric acid compounds includes a metal ion precipitation kettle and an acid-base adjustment kettle. A precipitation mechanism for facilitating the removal of metal ions from boric acid wastewater is provided on the metal ion precipitation kettle. An adjustment mechanism for facilitating the adjustment of the pH value of boric acid wastewater is provided on the acid-base adjustment kettle. A filtration mechanism for facilitating the transfer of boric acid waste liquid is provided on the acid-base adjustment kettle. The precipitation mechanism includes a first feed inlet and a first motor. The adjustment mechanism includes a second motor, a second feed inlet, and a pH value detector. The filtration mechanism includes a first sealing door, an L-shaped fixing rod, a third motor, a filter screen, and a movable rod. The first feed inlet is fixedly installed at the upper end of the metal ion precipitation kettle. The first motor is fixedly installed at the side end of the metal ion precipitation kettle. The second motor is fixedly installed at the side end of the acid-base adjustment kettle. The second feed inlet is fixedly installed at the upper end of the acid-base adjustment kettle. The pH value detector is fixedly installed at the upper end of the acid-base adjustment kettle. A chute is opened at the lower end of the acid-base adjustment kettle. A second sealing door is provided at the side end of the first sealing door. Slide rods are fixedly installed at the upper ends of the first sealing door and the second sealing door. The two slide rods are respectively slidably installed on the inner side wall of the chute. The L-shaped fixing rod is fixedly installed at the side end of the acid-base adjustment kettle. A relay is fixedly installed at the lower end of the L-shaped fixing rod. The filter screen is fixedly installed on the inner side wall of the acid-base adjustment kettle. A bracket is fixedly installed at the circumferential end of the metal ion precipitation kettle. A C-shaped support rod is fixedly installed between the acid-base adjustment kettle and the metal ion precipitation kettle. Stirring rods are fixedly installed at the output ends of the first motor and the second motor. The two stirring rods respectively penetrate and are rotatably installed at the side ends of the metal ion precipitation kettle and the acid-base adjustment kettle. A pH value detection probe is fixedly installed at the lower end of the pH value detector. The end of the pH value detection probe contacts the solution in the acid-base adjustment kettle. A sealing bearing is further provided at the side end of the acid-base adjustment kettle. A round shaft is fixedly installed at the side end of the acid-base adjustment kettle. A gear is rotatably installed at the circumferential end of the round shaft. A side rod is fixedly installed at the side end of the first sealing door. A first rack is fixedly installed at the side end of the side rod. A second rack is fixedly installed at the side end of the second sealing door. A push block is fixedly installed at the lower end of the second sealing door. The same C-shaped push rod is fixedly installed at both side ends of the push block. The C-shaped push rod is located at the upper end of the L-shaped fixing rod. A cylinder is electrically connected to the side end of the relay. The push block is fixedly installed at the side end of the cylinder. A sealing box is fixedly installed at the upper end of the L-shaped fixing rod. The third motor is fixedly installed on the inner side wall of the sealing box. A pressing switch is provided at the side end of the third motor. A round rod is fixedly installed at the output end of the third motor. The round rod is located on the inner side wall of the sealing bearing.

[0010] Preferably, a threaded rod is fixedly installed at the side end of the round rod. The movable rod is located on the inner side wall of the acid-base mixing kettle. A threaded groove is formed through the side end of the movable rod, and the threaded rod is rotationally installed on the inner side wall of the threaded groove by threading.

[0011] Preferably, a cleaning brush is provided at the lower end of the movable rod. Two springs are fixedly installed between the cleaning brush and the movable rod. Two telescopic rods are also fixedly installed between the cleaning brush and the movable rod, and the two telescopic rods are respectively located on the inner side wall of the springs.

[0012] A multi-stage treatment process for the reaction of boric acid compounds is as follows:

[0013] S1: Add the preliminarily filtered boric acid waste liquid into the acid-base mixing kettle through the second feed port, and add alkaline substances such as calcium hydroxide or sodium hydroxide to neutralize the boric acid waste liquid first.

[0014] S2: The pH detection probe on the pH value detector can detect the acidity and alkalinity of the solution in the acid-base mixing kettle in real time. After the acidity and alkalinity of the solution in the acid-base mixing kettle are adjusted to balance, a signal is transmitted to the relay. After the relay receives the signal, it will drive the cylinder to contract and open the first sealing door and the second sealing door.

[0015] S3: When the boric acid waste liquid in the acid-base mixing kettle is transferred to the metal ion precipitation kettle, the liquid in the acid-base mixing kettle will pass through the filter screen for filtration.

[0016] S4: The movable rod moves reciprocally, thereby realizing the cleaning of the filter screen and avoiding the blockage of the filter screen.

[0017] S5: After the boric acid waste liquid in the acid-base mixing kettle is transferred to the metal ion precipitation kettle, the user can add a specific precipitant into the metal ion precipitation kettle through the first feed port, so that the heavy metal ions in the waste liquid form insoluble precipitates, realizing multi-stage treatment.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] In the present invention, by providing a pH value detector, a pH detection probe, a relay and a cylinder in cooperation, when the boric acid waste liquid after the acidity and alkalinity are adjusted is professionally processed in the next step, the acidity and alkalinity can be monitored in real time through the pH detection probe on the pH value detector, and after the adjustment is completed, the relay is used to drive the cylinder to open the second sealing door and the first sealing door. There is no need for operators to regularly take samples from the reaction kettle and then use a pH meter for detection, which improves the detection efficiency of the boric acid waste liquid and avoids the disadvantage of the time delay of manual detection.

[0020] In the present invention, after detection by the pH detection probe on the pH detector, the boric acid waste liquid is transferred, which improves the accuracy and stability of the boric acid waste liquid during treatment. The pH value detected by the pH detector is relatively accurate, and its measurement is continuous and real-time, which can more accurately judge whether the acidity and alkalinity reach the level suitable for the next treatment, avoiding inaccurate judgment of the acidity and alkalinity, thus affecting the timing of liquid transfer. It may cause the liquid with incompletely adjusted acidity and alkalinity to be transferred, or miss the best transfer time.

[0021] In the present invention, by providing a pH detector and a pH detection probe to automatically detect the liquid in the acid-base mixing kettle, it reduces the manual contact with the dangerous environment. Manual detection requires the operator to frequently approach the reaction kettle for sampling, while the boric acid waste liquid in the reaction kettle may have dangerous characteristics such as corrosiveness and volatility. The pH detector can automatically detect and realize the transfer of the liquid, reducing the chance of the operator directly contacting dangerous chemicals and reducing the safety risk.

[0022] In the present invention, through the cooperation of a third motor, a threaded rod, a movable rod and a cleaning brush, the filter screen intercepts possible incompletely dissolved solid impurities, flocculants, etc. in the acid-base mixing kettle, preventing these substances from entering the metal ion precipitation kettle and affecting the heavy metal ion precipitation reaction. And the reciprocating movement of the cleaning brush can timely remove the impurities accumulated on the filter screen, maintaining the good permeability of the filter screen, avoiding the low transfer efficiency of the boric acid waste liquid caused by the blockage of the filter screen, and thus improving the operation efficiency of the entire boric acid waste liquid treatment system.

[0023] In the present invention, through the cooperation of a cylinder, a C-shaped push rod, a third motor and a push switch, the opening and closing of the second sealing door are synchronized with the start and stop of the third motor, and the opening and closing of the second sealing door and the cleaning of the cleaning brush are synchronized, ensuring the automation and coordination during the use of the equipment, reducing the manual intervention link. When the first sealing door and the second sealing door are closed, the operation of the cleaning brush also stops, avoiding the ineffective work of the cleaning brush when there is no liquid passing through or unnecessary damage to the filter screen. At the same time, when the first sealing door and the second sealing door are opened, it drives the cleaning brush to operate, ensuring the filtering efficiency of the filter screen.

[0024] In the present invention, by providing an acid-base mixing kettle and a metal ion precipitation kettle, the acid-base mixing of the boric acid waste liquid and the precipitation of heavy metal ions are respectively realized, achieving multi-stage treatment, which can better ensure the quality and efficiency of the boric acid waste liquid treatment, avoiding the situation that it is difficult to control the control parameters and monitoring indicators and the precipitation waste cannot be classified and recycled when a single reaction kettle is used for treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of the metal ion precipitation kettle of the present invention;

[0026] Figure 2 is a schematic structural diagram of the acid-base mixing kettle of the present invention;

[0027] Figure 3 is an exploded schematic structural diagram of the metal ion precipitation kettle of the present invention;

[0028] Figure 4 is a schematic structural diagram of the pH detector of the present invention;

[0029] Figure 5 is a schematic structural diagram of the first sealing door of the present invention;

[0030] Figure 6 is a schematic structural diagram of the second sealing door of the present invention;

[0031] Figure 7 is a schematic structural diagram of the filter screen of the present invention;

[0032] Figure 8 is an exploded schematic structural diagram of the cleaning brush of the present invention.

[0033] In the figure, the corresponding relationship between the component names and the drawing reference numerals is as follows: 1, metal ion precipitation kettle; 11, bracket; 12, C-shaped support rod; 13, first feed inlet; 14, first motor; 15, stirring rod; 2, acid-base mixing kettle; 21, second motor; 22, second feed inlet; 23, pH detector; 24, pH detection probe; 25, sealing bearing; 26, round shaft; 27, gear; 28, sliding groove; 3, first sealing door; 31, side rod; 32, first rack; 33, second sealing door; 34, second rack; 35, sliding rod; 36, push block; 37, C-shaped push rod; 4, L-shaped fixing rod; 41, relay; 42, cylinder; 43, sealing box; 5, third motor; 51, pressing switch; 52, round rod; 53, threaded rod; 6, filter screen; 7, movable rod; 71, threaded groove; 72, cleaning brush; 73, spring; 74, telescopic rod. Detailed implementation manners

[0034] The following further describes the implementation manners of the present invention in detail with reference to the drawings and embodiments. The following embodiments are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0035] Please refer to Figure 1 - Figure 8, the present invention provides a multi-stage treatment device for the reaction of boric acid compounds, including a metal ion precipitation kettle 1 and an acid-base adjustment kettle 2. The metal ion precipitation kettle 1 is provided with a precipitation mechanism for facilitating the removal of metal ions from boric acid wastewater. The acid-base adjustment kettle 2 is provided with an adjustment mechanism for facilitating the adjustment of the pH value of boric acid wastewater. The acid-base adjustment kettle 2 is provided with a filtration mechanism for facilitating the transfer of boric acid waste liquid. The precipitation mechanism includes a first feed inlet 13 and a first motor 14. The adjustment mechanism includes a second motor 21, a second feed inlet 22, and a pH value detector 23. The filtration mechanism includes a first sealing door 3, an L-shaped fixing rod 4, a third motor 5, a filter screen 6, and a movable rod 7. The first feed inlet 13 is fixedly installed at the upper end of the metal ion precipitation kettle 1. The first motor 14 is fixedly installed at the side end of the metal ion precipitation kettle 1. The second motor 21 is fixedly installed at the side end of the acid-base adjustment kettle 2. The second feed inlet 22 is fixedly installed at the upper end of the acid-base adjustment kettle 2. The pH value detector 23 is fixedly installed at the upper end of the acid-base adjustment kettle 2. When initially treating boric acid waste liquid, the preliminarily filtered boric acid waste liquid can be added into the acid-base adjustment kettle 2 through the second feed inlet 22. During the preparation process of boric acid compounds, it is inevitable to generate waste liquid and waste materials, and these waste liquids are mostly acidic waste liquids. Therefore, alkaline substances such as calcium hydroxide or sodium hydroxide need to be added to neutralize the boric acid waste liquid first. The user can add the corresponding amount of alkaline substances through the second feed inlet 22. After the addition is completed, the second motor 21 can be started. The second motor 21 will drive the stirring rod 15 on the second motor 21 to rotate, and stir the boric acid waste liquid and the alkaline substances;

[0036] A chute 28 is provided at the lower end of the acid-base mixing kettle 2. A second sealing door 33 is provided at the side end of the first sealing door 3. Slide rods 35 are fixedly installed at the upper ends of the first sealing door 3 and the second sealing door 33. The two slide rods 35 are respectively slidably installed on the inner side walls of the chute 28. An L-shaped fixing rod 4 is fixedly installed at the side end of the acid-base mixing kettle 2. A relay 41 is fixedly installed at the lower end of the L-shaped fixing rod 4. A filter screen 6 is fixedly installed on the inner side wall of the acid-base mixing kettle 2. A support 11 is fixedly installed at the circumferential end of the metal ion precipitation kettle 1. A C-shaped support rod 12 is fixedly installed between the acid-base mixing kettle 2 and the metal ion precipitation kettle 1. Stirring rods 15 are fixedly installed at the output ends of the first motor 14 and the second motor 21. The two stirring rods 15 respectively penetrate and are rotatably installed at the side ends of the metal ion precipitation kettle 1 and the acid-base mixing kettle 2. A pH value detection probe 24 is fixedly installed at the lower end of the pH value detector 23. The end of the pH value detection probe 24 is in contact with the solution in the acid-base mixing kettle 2. A pH value detector 23 is provided on the acid-base mixing kettle 2. The pH value detection probe 24 on the pH value detector 23 can detect the acidity and alkalinity of the solution in the acid-base mixing kettle 2 in real time. After the acidity and alkalinity of the solution in the acid-base mixing kettle 2 are adjusted to balance, the pH value detector 23 will detect through the pH value detection probe 24. The pH value detector 23 is connected to the relay 41 through a wireless module. The pH value detector 23 usually has the function of outputting signals. These signals can be analog signals or digital signals. Through a wireless communication module such as Bluetooth, WiFi, etc., these signals can be transmitted to the relay 41;

[0037] A sealing bearing 25 is also provided at the side end of the acid-base mixing kettle 2. A round shaft 26 is fixedly installed at the side end of the acid-base mixing kettle 2. A gear 27 is rotatably installed at the circumferential end of the round shaft 26. A side rod 31 is fixedly installed at the side end of the first sealing door 3. A first rack 32 is fixedly installed at the side end of the side rod 31. A second rack 34 is fixedly installed at the side end of the second sealing door 33. A push block 36 is fixedly installed at the lower end of the second sealing door 33. The same C-shaped push rod 37 is fixedly installed at both side ends of the push block 36. The C-shaped push rod 37 is located at the upper end of the L-shaped fixing rod 4. The side end of the relay 41 is electrically connected to a cylinder 42. The push block 36 is fixedly installed at the side end of the cylinder 42. A sealing box 43 is fixedly installed at the upper end of the L-shaped fixing rod 4. The third motor 5 is fixedly installed on the inner side wall of the sealing box 43. After the relay 41 receives a signal, it will drive the cylinder 42 to contract. When the cylinder 42 contracts, it will drive the second sealing door 33 to move. When the second sealing door 33 moves, it will drive the second rack 34 to move. When the second rack 34 moves, it will drive the gear 27 to rotate. When the gear 27 rotates, it will drive the first rack 32 to move. The second rack 34 and the first rack 32 will move in opposite directions. Furthermore, the first sealing door 3 and the second sealing door 33 are driven to move in opposite directions and open through the second rack 34 and the first rack 32. The solution in the acid-base mixing kettle 2 will flow from the lower part of the acid-base mixing kettle 2 into the metal ion precipitation kettle 1;

[0038] A pressing switch 51 is provided at the side end of the third motor 5. A round rod 52 is fixedly installed at the output end of the third motor 5. The round rod 52 is located on the inner side wall of the sealed bearing 25. A threaded rod 53 is fixedly installed at the side end of the round rod 52. The movable rod 7 is located on the inner side wall of the acid-base mixing kettle 2. A threaded groove 71 is formed through the side end of the movable rod 7. The threaded rod 53 is threadedly rotatably installed on the inner side wall of the threaded groove 71. A cleaning brush 72 is provided at the lower end of the movable rod 7. Two springs 73 are fixedly installed between the cleaning brush 72 and the movable rod 7. Two telescopic rods 74 are also fixedly installed between the cleaning brush 72 and the movable rod 7. The two telescopic rods 74 are respectively located on the inner side wall of the spring 73. When the boric acid waste liquid in the acid-base mixing kettle 2 is transferred into the metal ion precipitation kettle 1, the liquid in the acid-base mixing kettle 2 will pass through the filter screen 6 for filtration, and the impurities after the mixing reaction in the acid-base mixing kettle 2 will be filtered out. When the second sealing door 33 moves, it will also drive the C-shaped push rod 37 at the side end of the push block 36 to move. After the C-shaped push rod 37 moves completely open, the C-shaped push rod 37 will contact the pressing switch 51 at the side end of the third motor 5 and press the pressing switch 51, thereby starting the third motor 5. After the third motor 5 is started, it will drive the round rod 52 to rotate. The rotation of the round rod 52 will drive the threaded rod 53 to rotate. The rotation of the threaded rod 53 will drive the movable rod 7 to reciprocate through the threaded groove 71. The movement of the movable rod 7 will drive the cleaning brush 72 to move through the telescopic rod 74 and the spring 73, thereby realizing the cleaning of the filter screen 6 and avoiding the situation that the filter screen 6 may be blocked when the filter screen 6 filters the boric acid waste liquid in the acid-base mixing kettle 2.

[0039] Working principle:

[0040] First step, during the preparation of boric acid compounds, it is inevitable to generate waste liquid and waste materials. When preparing boric acid by reacting borax with acid, there will be remaining acid solution and salt solution generated after the reaction; when extracting boric acid from ore, after the ore is treated by acid leaching, etc., acidic waste liquid containing impurity metal ions will be generated, and some mother liquors will also be generated during the processes of filtration, crystallization, etc. These mother liquors may contain substances such as boric acid that is not completely crystallized and impurity ions. Therefore, during the preparation of boric acid compounds, it is necessary to recycle these waste liquids. The user can inject the waste liquid into the acid-base mixing kettle 2 from the second feed port 22. Since most of the boric acid preparation waste liquid is acidic waste liquid, after preliminary filtration, it is necessary to carry out acid-base adjustment treatment. After injecting the waste liquid into the acid-base mixing kettle 2, alkaline substances such as calcium hydroxide or sodium hydroxide can be added for neutralization. After neutralization, the liquid can be transferred to the metal ion precipitation kettle 1 to remove heavy metal ions or other harmful ions in the waste liquid. The boric acid waste liquid may contain metal ions such as iron and magnesium, and precipitants can be added to form insoluble precipitates, thereby realizing the multi-stage treatment of the boric acid waste liquid.

[0041] In the second step, when initially treating the boric acid waste liquid, the preliminarily filtered boric acid waste liquid can be added into the acid-base conditioning kettle 2 through the second feed port 22. During the preparation process of boric acid compounds, waste liquid and waste materials will inevitably be generated, and most of these waste liquids are acidic waste liquids. Therefore, alkaline substances such as calcium hydroxide or sodium hydroxide need to be added to neutralize the boric acid waste liquid first. The user can add the corresponding amount of alkaline substances through the second feed port 22. After the addition is completed, the second motor 21 can be started. The second motor 21 will drive the stirring rod 15 on the second motor 21 to rotate, stirring the boric acid waste liquid and the alkaline substances, thereby improving the efficiency of pH adjustment. A pH detector 23 is installed on the acid-base conditioning kettle 2. The pH detection probe 24 on the pH detector 23 can detect the pH value of the solution in the acid-base conditioning kettle 2 in real time. After the pH value of the solution in the acid-base conditioning kettle 2 is adjusted to balance, the pH detector 23 will detect it through the pH detection probe 24. The pH detector 23 is connected to the relay 41 through a wireless module. The pH detector 23 usually has the function of outputting signals, and these signals can be analog signals or digital signals. Through wireless communication modules such as Bluetooth and WiFi, these signals can be transmitted to the relay 41. After the relay 41 receives the signal, it will drive the cylinder 42 to contract. When the cylinder 42 contracts, it will drive the second sealing door 33 to move. The movement of the second sealing door 33 will drive the second rack 34 to move. The movement of the second rack 34 will drive the gear 27 to rotate. The rotation of the gear 27 will drive the first rack 32 to move. The second rack 34 and the first rack 32 will move in opposite directions. Thus, the first sealing door 3 and the second sealing door 33 are driven to move and open in opposite directions, and the solution in the acid-base conditioning kettle 2 will flow from the lower part of the acid-base conditioning kettle 2 into the metal ion precipitation kettle 1;

[0042] By setting up the pH detector 23, the pH detection probe 24, the relay 41 and the cylinder 42 in cooperation, when the boric acid waste liquid with adjusted pH value is to be professionally processed in the next step, the pH value can be monitored in real time through the pH detection probe 24 on the pH detector 23, and after the adjustment is completed, the relay 41 is used to drive the cylinder 42, so that the second sealing door 33 and the first sealing door 3 are opened. There is no need for operators to regularly take samples from the reaction kettle and then use a pH meter for detection, which improves the detection efficiency of the boric acid waste liquid and avoids the drawback of the time delay in manual detection;

[0043] The device transfers the boric acid waste liquid after detection by a pH detection probe 24 on a pH detector 23, thereby improving the accuracy and stability of the boric acid waste liquid during treatment. The pH value detected by the pH detector 23 is relatively accurate, and its measurement is continuous and real-time, which can more accurately determine whether the pH has reached a level suitable for the next step of treatment, avoiding inaccurate judgment of the pH, which may affect the timing of liquid transfer, and may cause the liquid with incomplete pH to be transferred, or miss the optimal transfer time;

[0044] The device automatically detects the liquid in the acid-base blending kettle 2 by providing a pH detector 23 and a pH detection probe 24, thereby reducing manual contact with hazardous environments. Manual detection requires operators to frequently approach the reactor to take samples. The boric acid waste liquid in the reactor may have corrosive, volatile and other hazardous properties. The pH detector 23 can automatically detect and transfer the liquid, reducing the operator's chance of direct contact with hazardous chemicals and reducing safety risks.

[0045] After the second sealing door 33 moves, it will also drive the C-shaped push rod 37 at the side end of the push block 36 to move. After the C-shaped push rod 37 moves and is fully opened, the C-shaped push rod 37 will contact the pressing switch 51 at the side end of the third motor 5 and press the pressing switch 51 to start the third motor 5. After the third motor 5 is started, it will drive the round rod 52 to rotate. The rotation of the round rod 52 will drive the threaded rod 53 to rotate. The rotation of the threaded rod 53 will drive the movable rod 7 to move back and forth through the thread groove 71. The movement of the movable rod 7 will drive the cleaning brush 72 to move through the telescopic rod 74 and the spring 73, thereby realizing the cleaning of the filter screen 6, avoiding the situation that the filter screen 6 may be blocked when the filter screen 6 filters the boric acid waste liquid in the acid-base blending kettle 2;

[0046] The present device is provided with a third motor 5, a threaded rod 53, a movable rod 7 and a cleaning brush 72, which cooperate to intercept incompletely dissolved solid impurities, flocculants, etc. that may be present in the acid-base blending kettle 2 through the filter 6, thereby preventing these substances from entering the metal ion precipitation kettle 1 and affecting the heavy metal ion precipitation reaction. The reciprocating movement of the cleaning brush 72 can timely remove impurities accumulated on the filter 6, maintain good permeability of the filter 6, avoid low boric acid waste liquid transfer efficiency due to clogging of the filter 6, and thus improve the operating efficiency of the entire boric acid waste liquid treatment system;

[0047] By arranging the air cylinder 42, C-shaped push rod 37, third motor 5 and push switch 51 in cooperation, the opening and closing of the second sealing door 33 are synchronized with the start and stop of the third motor 5, so that the opening and closing of the second sealing door 33 and the cleaning of the cleaning brush 72 are synchronized, ensuring the automation and coordination during the use of the equipment, reducing the manual intervention links. When the first sealing door 3 and the second sealing door 33 are closed, the operation of the cleaning brush 72 also stops, avoiding the ineffective work of the cleaning brush 72 when there is no liquid passing through or unnecessary damage to the filter screen 6. At the same time, when the first sealing door 3 and the second sealing door 33 are opened, the cleaning brush 72 is driven to operate, ensuring the filtering efficiency of the filter screen 6.

[0048] Fourth step, after the boric acid waste liquid in the acid-base mixing kettle 2 is transferred to the metal ion precipitation kettle 1, the user can add a specific precipitant into the metal ion precipitation kettle 1 through the first feed port 13, so that the heavy metal ions in the waste liquid form insoluble precipitates. At the same time, the first motor 14 on the metal ion precipitation kettle 1 can be started to drive the stirring rod 15 to rotate, realizing the efficient mixing of the precipitant and the boric acid waste liquid, ensuring sufficient contact between the precipitant and the boric acid waste liquid, and thus realizing the secondary treatment of the boric acid waste liquid.

[0049] By arranging the acid-base mixing kettle 2 and the metal ion precipitation kettle 1, the acid-base mixing of the boric acid waste liquid and the precipitation of heavy metal ions are respectively realized, achieving multi-stage treatment, which can better ensure the quality and efficiency of the boric acid waste liquid treatment, and avoiding the situations such as difficult control of control parameters and monitoring indicators and inability to classify and recycle precipitation waste caused by using a single reaction kettle for treatment.

[0050] The embodiments of the present invention are given for purposes of illustration and description, and are not exhaustive or limit the invention to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are chosen and described in order to better explain the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and design various embodiments with various modifications suitable for specific purposes.

Claims

1. A multi-stage treatment device for the reaction of a boric acid compound, comprising a metal ion precipitation kettle (1) and an acid-base adjustment kettle (2), characterized in that: The metal ion precipitation kettle (1) is provided with a precipitation mechanism for facilitating the removal of metal ions from boric acid wastewater, the acid-base adjustment kettle (2) is provided with an adjustment mechanism for facilitating the adjustment of the pH value of boric acid wastewater, and the acid-base adjustment kettle (2) is provided with a filtering mechanism for facilitating the transfer of boric acid waste liquid; Among them, the precipitation mechanism includes a first feed inlet (13) and a first motor (14), the adjustment mechanism includes a second motor (21), a second feed inlet (22) and a pH detector (23), the filtering mechanism includes a first sealing door (3), an L-shaped fixing rod (4), a third motor (5), a filter screen (6) and a movable rod (7). The first feed inlet (13) is fixedly installed at the upper end of the metal ion precipitation kettle (1), the first motor (14) is fixedly installed at the side end of the metal ion precipitation kettle (1), the second motor (21) is fixedly installed at the side end of the acid-base adjustment kettle (2), the second feed inlet (22) is fixedly installed at the upper end of the acid-base adjustment kettle (2), the pH detector (23) is fixedly installed at the upper end of the acid-base adjustment kettle (2). A chute (28) is opened at the lower end of the acid-base adjustment kettle (2). A second sealing door (33) is provided at the side end of the first sealing door (3). Sliding rods (35) are fixedly installed at the upper ends of the first sealing door (3) and the second sealing door (33). The two sliding rods (35) are respectively slidably installed on the inner side wall of the chute (28). The L-shaped fixing rod (4) is fixedly installed at the side end of the acid-base adjustment kettle (2). A relay (41) is fixedly installed at the lower end of the L-shaped fixing rod (4). The filter screen (6) is fixedly installed on the inner side wall of the acid-base adjustment kettle (2); A side rod (31) is fixedly installed at the side end of the first sealing door (3). A first rack (32) is fixedly installed at the side end of the side rod (31). A second rack (34) is fixedly installed at the side end of the second sealing door (33). A push block (36) is fixedly installed at the lower end of the second sealing door (33). The two side ends of the push block (36) are fixedly installed with the same C-shaped push rod (37); Among them, the C-shaped push rod (37) is located at the upper end of the L-shaped fixing rod (4). A cylinder (42) is electrically connected to the side end of the relay (41). The push block (36) is fixedly installed at the side end of the cylinder (42). A sealing box (43) is fixedly installed at the upper end of the L-shaped fixing rod (4). The third motor (5) is fixedly installed on the inner side wall of the sealing box (43). A pressing switch (51) is provided at the side end of the third motor (5). A round rod (52) is fixedly installed at the output end of the third motor (5). The round rod (52) is located on the inner side wall of the sealing bearing (25). A threaded rod (53) is fixedly installed at the side end of the round rod (52). The movable rod (7) is located on the inner side wall of the acid-base adjustment kettle (2). A threaded groove (71) is opened through the side end of the movable rod (7); Wherein, the threaded rod (53) is rotationally installed on the inner side wall of the threaded groove (71). A cleaning brush (72) is provided at the lower end of the movable rod (7). Two springs (73) are fixedly installed between the cleaning brush (72) and the movable rod (7). Two telescopic rods (74) are also fixedly installed between the cleaning brush (72) and the movable rod (7). The two telescopic rods (74) are respectively located on the inner side walls of the springs (73).

2. The multi-stage treatment device for the reaction of a boric acid compound as described in claim 1, wherein A bracket (11) is fixedly installed at the circumferential end of the metal ion precipitation kettle (1). A C-shaped support rod (12) is fixedly installed between the acid-base mixing kettle (2) and the metal ion precipitation kettle (1). Stirring rods (15) are fixedly installed at the output ends of the first motor (14) and the second motor (21). The two stirring rods (15) respectively penetrate and are rotationally installed at the side ends of the metal ion precipitation kettle (1) and the acid-base mixing kettle (2).

3. The multi-stage treatment device for the reaction of a boric acid compound as described in claim 2, characterized in that, A pH value detection probe (24) is fixedly installed at the lower end of the pH value detector (23). The end of the pH value detection probe (24) is in contact with the solution in the acid-base mixing kettle (2). A sealing bearing (25) is also provided at the side end of the acid-base mixing kettle (2). A round shaft (26) is fixedly installed at the side end of the acid-base mixing kettle (2); Wherein, a gear (27) is rotationally installed at the circumferential end of the round shaft (26).

4. A multi-stage treatment process for the reaction of a boric acid compound, characterized in that, Using the multi-stage treatment equipment for the reaction of the boric acid compound described in any one of claims 1-3, the steps are as follows: S1: Add the preliminarily filtered boric acid waste liquid into the acid-base mixing kettle (2) through the second feed port (22), and add calcium hydroxide or sodium hydroxide to neutralize the boric acid waste liquid first; S2: The pH value detection probe (24) on the pH value detector (23) can detect the acidity and alkalinity of the solution in the acid-base mixing kettle (2) in real time. After the acidity and alkalinity of the solution in the acid-base mixing kettle (2) are adjusted to balance, a signal is transmitted to the relay (41). After the relay (41) receives the signal, it will drive the cylinder (42) to contract, and open the first sealing door (3) and the second sealing door (33); S3: When the boric acid waste liquid in the acid-base mixing kettle (2) is transferred into the metal ion precipitation kettle (1), the liquid in the acid-base mixing kettle (2) will pass through the filter screen (6) for filtration; S4: The movable rod (7) moves reciprocally, thereby realizing the cleaning of the filter screen (6) and avoiding the blockage of the filter screen (6); S5: After the boric acid waste liquid in the acid-base mixing kettle (2) is transferred into the metal ion precipitation kettle (1), the user adds a precipitant into the metal ion precipitation kettle (1) through the first feed port (13), so that the heavy metal ions in the waste liquid form insoluble precipitates, realizing multi-stage treatment.

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