A device for deep arsenic removal from phosphoric acid and its arsenic removal process

Abstract

The present invention discloses a device for deep arsenic removal from phosphoric acid and its arsenic removal process, which relates to the technical field of efficient arsenic removal from phosphoric acid. It includes an automatic feeding continuous arsenic removal reactor. Through the cooperation of a temperature control heating component, an arsenic biosensor, a discharging drive motor, a rotating rod, a drying rake blade and a heat conducting rod, the position adjustment of the microwave heating source and the intelligent control of the microwave power are realized. This makes the microwave heating more accurate, and the combination of microwave heating and the internal drying rake blade stirring system not only improves the heating efficiency of the material, but also promotes the uniform mixing of the material, can adapt to the temperature changes in different areas of the automatic feeding continuous arsenic removal reactor, ensures the consistency and controllability of the reaction conditions, and the heat conducting rods arranged in an array can quickly respond to temperature changes, realize the uniform distribution of heat, avoid local overheating, and at the same time can flexibly adjust the heat conduction path according to needs to ensure the temperature uniformity in the automatic feeding continuous arsenic removal reactor.

Description

Technical Field

[0001] The present invention relates to the technical field of efficient arsenic removal in phosphoric acid, and specifically to a device and process for deep arsenic removal from phosphoric acid. Background Technique

[0002] Arsenic and phosphorus are in the same group. It is a key impurity that is commonly present and difficult to remove in various phosphochemical products. Deep arsenic removal is of great significance for improving the refinement level of wet-process phosphoric acid and making more effective use of low-grade phosphorus resources. In wet-process phosphoric acid, arsenic mainly exists in the forms of arsenic acid and arsenous acid. In the laboratory, methods such as chemical precipitation, crystallization, ion exchange resin, and electrodialysis are mainly used for arsenic removal; while in actual industrial production, chemical precipitation is mainly used for arsenic removal.

[0003] However, in the prior art, during the deep arsenic removal operation of phosphoric acid, although an appropriate temperature can accelerate the precipitation or adsorption process of arsenic compounds, too high or too low a temperature will reduce the arsenic removal efficiency, and the gases generated during arsenic removal cannot be well utilized, resulting in low purity of subsequent arsenic removal and easy influence on the quantity. Therefore, it is necessary to propose a device and process for deep arsenic removal from phosphoric acid. Summary of the Invention

[0004] The purpose of the present invention is to provide a device and process for deep arsenic removal from phosphoric acid to solve the problems raised in the above background technique, that is, during the deep arsenic removal operation of phosphoric acid, although an appropriate temperature can accelerate the precipitation or adsorption process of arsenic compounds, too high or too low a temperature will reduce the arsenic removal efficiency, and the gases generated during arsenic removal cannot be well utilized, resulting in low purity of subsequent arsenic removal and easy influence on the quantity.

[0005] To achieve the above object, the present invention provides the following technical solutions: A deep arsenic removal device for phosphoric acid and its arsenic removal process, including an automatic feeding continuous arsenic removal reactor. A precipitation area is installed at the bottom of the automatic feeding continuous arsenic removal reactor. A top sealing flange is installed at the top of the automatic feeding continuous arsenic removal reactor. A temperature control heating component is installed on the outer peripheral side of the automatic feeding continuous arsenic removal reactor. A metering feeder is installed on the top surface of the automatic feeding continuous arsenic removal reactor. Three dosing metering pipes are respectively connected to the side end of the metering feeder. The side ends of the three dosing metering pipes are connected to a feeding valve port. A feeding end is connected to the side end of the metering feeder. The bottom ends of the feeding end and the feeding valve port are both connected to the top wall surface of the automatic feeding continuous arsenic removal reactor. An exhaust pipe is connected to the side end of the automatic feeding continuous arsenic removal reactor. A gas collector is installed outside the exhaust pipe. A discharge pipe is connected to the bottom end of the precipitation area. A control valve is installed outside the side end of the discharge pipe. An arsenic biosensor is installed at the bottom side of the discharge pipe. A circulator is connected to the side end of the discharge pipe. The bottom end of the exhaust pipe and the top end of the circulator are connected and arranged. A Tesla valve pipe is connected to the side end of the exhaust pipe. The bottom of the Tesla valve pipe is connected to a continuous flow reactor. Four reaction pipes are connected to the peripheral side of the continuous flow reactor. One-way check valves are installed outside the side ends of the four reaction pipes. A pressure reaction control end is installed on the outer surface of the four reaction pipes. A guiding filter air pipe is connected to the side end of the circulator. The guiding filter air pipe is connected to a stripping tower. A clean delivery air pipe is connected to the bottom side of the stripping tower. A treatment discharge pipe is connected to the side of the stripping tower. An automatic adder is installed outside the guiding filter air pipe.

[0006] Preferably, the temperature control heating component includes an outer gear ring. A connecting ring frame track is slidably connected to the top of the outer gear ring. A side frame is fixedly connected to the side end of the connecting ring frame track. A main support structure is fixedly connected to the side end of the side frame. The other side end of the side frame is fixedly connected to the side wall of the automatic feeding continuous arsenic removal reactor. A driving motor is installed inside the side frame.

[0007] Preferably, a main driving gear is connected to the top output end of the driving motor. The side end of the main driving gear is meshed with the outer gear ring. A connecting rod column is fixedly connected to the inner wall surface of the outer gear ring. A vertical wire track is fixedly connected to the top of the connecting rod column. A sliding groove block is fixedly connected to the top of the vertical wire track. A servo motor is installed inside the sliding groove block. An annular sliding track is slidably connected to the top of the sliding groove block. The left and right sides of the annular sliding track are fixedly connected to the surface of the main support structure.

[0008] Preferably, a sliding saddle is slidably connected inside the vertical rail. A microwave generation controller is installed at the side end of the sliding saddle, and a microwave heating generator is arranged at the side end of the microwave generation controller.

[0009] Preferably, a discharging drive motor is installed at the top of the automatic feeding continuous arsenic removal reactor. The bottom output end of the discharging drive motor penetrates through the automatic feeding continuous arsenic removal reactor and is connected with a rotating rod, and drying rake blades are installed outside the rotating rod.

[0010] Preferably, an automatic iris valve is installed inside the precipitation area. An ion exchange membrane is installed at the bottom of the automatic iris valve. Arrayed multiple groups of heat conducting rods are arranged around the inside of the automatic feeding continuous arsenic removal reactor. The generating end direction of the microwave heating generator and the arrayed multiple groups of heat conducting rods are arranged corresponding to the detection of the built-in temperature sensor.

[0011] Preferably, four reaction tubes are communicated with a guiding reaction tube at the side end. The guiding reaction tube is communicated with a catalytic oxidizer at the side end, and the catalytic oxidizer is communicated with a circulating two-way tube at the side end.

[0012] Preferably, the circulating two-way tube is communicated with a washing adsorption tower at the side end, and a washing circulation pump is arranged at the bottom of the washing adsorption tower.

[0013] Preferably, a detection sampling end and a discharging end are respectively arranged on the side surface of the washing adsorption tower. The three dosing metering tubes are respectively an acid solution dropping metering tube, an alkali solution dropping metering tube and an arsenic removal liquid agent metering tube.

[0014] A phosphoric acid deep arsenic removal device and its arsenic removal process include the following steps:

[0015] S1. First, the raw materials can be added into the automatic feeding continuous arsenic removal reactor through a metering feeder. Then, under the cooperation of the temperature control heating component, it can be automatically adjusted according to the reaction rate monitored by the arsenic biosensor and the change amount of the arsenic material. After the raw materials enter, the discharging drive motor drives the rotating rod and the drying rake blades to rotate the raw materials. At the same time, under the cooperation of the three dosing metering tubes and the injection valve ports, the acid solution dropping metering, the alkali solution dropping metering and the arsenic removal liquid agent metering are added in sequence according to the requirements.

[0016] S2. Then, during the reaction operation inside the automatic feeding continuous arsenic removal reactor, the gas collector is used to adsorb and guide the gas containing arsenic medium generated during the reaction to the circulator, and under the cooperation of the circulator, it is transported to the stripping tower through the guiding filter gas pipe. After treatment, it is then communicated with the circulator through the clean guiding gas pipe.

[0017] S3. Subsequently, use a Tesla valve tube to guide the processed material from the discharge pipe into a continuous flow reactor, and with the cooperation of four groups of reaction tubes and one-way check valves, it is convenient to improve the processing efficiency;

[0018] S4. Then, through the connection of the guiding reaction tube and the four groups of reaction tubes, the material to be processed again is transported to the catalytic oxidizer, and then guided to the washing and adsorption tower for operation through the circulating two-way tube.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. In the present invention, through the cooperation of the temperature control heating component, arsenic biosensor, discharging drive motor, rotating rod, drying rake blade and heat conduction rod, the position adjustment of the microwave heating source and the intelligent control of the microwave power are realized. This makes the microwave heating more accurate, can adapt to the temperature changes in different areas of the automatic feeding continuous arsenic removal reactor, ensures the consistency and controllability of the reaction conditions, and the arrayed heat conduction rods can quickly respond to temperature changes, realize uniform heat distribution, avoid local overheating, and at the same time can flexibly adjust the heat conduction path according to needs to ensure the temperature uniformity in the automatic feeding continuous arsenic removal reactor. At the same time, the combination of microwave heating and the internal drying rake blade stirring system not only improves the heating efficiency of the material, but also promotes the uniform mixing of the material. This combination effectively improves the overall efficiency and effect of the arsenic removal operation. Especially through the synergistic effect of the flow control valves of the acid solution, alkali solution and arsenic removal liquid agent, and the microwave heating controller, a closed-loop control system is formed, which can be adjusted in real time according to the reaction variables to ensure the stability of the process and the product quality.

[0021] 2. In the present invention, through the cooperation of the exhaust pipe, gas collector, circulator, air stripping tower, clean guiding air pipe and guiding filter air pipe, the exhaust pipe is used to discharge the gas containing arsenic medium generated in the above reaction process, so that the gas collector adsorbs and guides the gas containing arsenic medium generated in the reaction to the circulator, and with the cooperation of the circulator, it is transported to the air stripping tower through the guiding filter air pipe. After treatment, then use the clean guiding air pipe to connect with the circulator, and then use the Tesla valve tube to guide the processed material from the discharge pipe into the continuous flow reactor, and with the cooperation of four groups of reaction tubes and one-way check valves, it is convenient to improve the processing efficiency.

[0022] 3. In the present invention, with the cooperation of a Tesla valve tube, a continuous flow reactor, a reaction tube, a one-way check valve, and a catalytic oxidizer, the treated material is guided from the discharge pipe to the continuous flow reactor by the Tesla valve tube. With the cooperation of four groups of reaction tubes and the one-way check valve, the treatment efficiency is facilitated. With the cooperation of the four groups of reaction tubes, the treated material is transported to the guiding reaction tube and then to the catalytic oxidizer through the guiding reaction tube. Under the action of the catalyst, a specific oxidation reaction will occur with the treated arsenic ion material, reducing the activation energy required for the reaction, accelerating the reaction rate, and possibly improving the selectivity and efficiency of the reaction. Also, under the action of the circulating bidirectional tube, when it is detected that the catalytic change amount is not reached when the catalytic arsenic ion material is subsequently transported to the washing and adsorption tower, the circulating bidirectional tube allows some of the treated arsenic ion material to return to the catalytic oxidizer again, which is beneficial to improving the utilization rate of raw materials and recovering arsenic ion materials with high catalytic purity. Then, when the arsenic ion material is guided from the circulating bidirectional tube to the washing and adsorption tower, the arsenic ion material will contact the washing liquid or adsorbent, and the unnecessary components will be separated through chemical or physical actions, thereby improving the purity of the final product. Moreover, the operation of the washing circulation pump promotes the washing liquid to rise in the washing and adsorption tower and contact the descending arsenic ion material in a countercurrent manner, enhancing the mass transfer efficiency and improving the washing or adsorption effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a front view structural schematic diagram of a phosphoric acid deep arsenic removal device of the present invention;

[0024] Figure 2 is a side view structural schematic diagram of a phosphoric acid deep arsenic removal device of the present invention;

[0025] Figure 3 is a partial structural schematic diagram of the main body of a phosphoric acid deep arsenic removal device of the present invention;

[0026] Figure 4 is a structural schematic diagram of the installation position of a temperature control heating component in a phosphoric acid deep arsenic removal device of the present invention;

[0027] Figure 5 is an internal sectional view structural schematic diagram of an automatic feeding continuous arsenic removal reactor in a phosphoric acid deep arsenic removal device of the present invention;

[0028] Figure 6 In a phosphoric acid deep arsenic removal device of the present invention Figure 5 is an enlarged structural schematic diagram of part A;

[0029] Figure 7 is a structural schematic diagram of the installation positions of a control valve and an arsenic biosensor in a phosphoric acid deep arsenic removal device of the present invention;

[0030] Figure 8Schematic diagram of the temperature control heating component in a device for deep arsenic removal from phosphoric acid according to the present invention;

[0031] Figure 9 In a device for deep arsenic removal from phosphoric acid according to the present invention Figure 8 Enlarged structural diagram at position B.

[0032] In the figure: 1. Automatic feeding continuous arsenic removal reactor; 2. Top sealing flange; 3. Temperature control heating component; 301. Outer gear ring; 302. Connecting ring frame track; 303. Side frame; 304. Driving motor; 305. Main driving gear; 306. Connecting rod column; 307. Vertical linear track; 308. Servo motor; 309. Annular sliding track; 3010. Sliding groove block; 3011. Sliding saddle; 3012. Microwave generation controller; 3013. Microwave heating generator; 4. Discharging driving motor; 5. Feeding metering pipe; 6. Injection valve port; 7. Metering feeder; 8. Precipitation area; 9. Main support structure; 10. Discharge pipe; 11. Exhaust pipe; 12. Gas collector; 13. Circulator; 14. Tesla valve pipe; 15. Continuous flow reactor; 16. Reaction pipe; 17. One-way check valve; 18. Guiding reaction pipe; 19. Catalytic oxidizer; 20. Circulation two-way pipe; 21. Washing adsorption tower; 22. Discharge end; 23. Washing circulation pump; 24. Automatic adder; 25. Stripping tower; 26. Cleaning guiding gas pipe; 27. Guiding filter gas pipe; 28. Feeding end; 29. Treatment discharge pipe; 30. Rotating rod; 31. Drying rake blade; 32. Heat conducting rod; 33. Automatic iris valve; 34. Ion exchange membrane; 35. Control valve; 36. Arsenic biosensor. Specific embodiments

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0034] Refer to Figures 1-9As shown: A deep arsenic removal device for phosphoric acid, including an automatic feeding continuous arsenic removal reactor 1. A precipitation area 8 is installed at the bottom of the automatic feeding continuous arsenic removal reactor 1. A top sealing flange 2 is installed at the top of the automatic feeding continuous arsenic removal reactor 1. A temperature control heating component 3 is installed on the outer peripheral side of the automatic feeding continuous arsenic removal reactor 1. A metering feeder 7 is installed on the top surface of the automatic feeding continuous arsenic removal reactor 1. Three dosing metering pipes 5 are respectively connected to the side end of the metering feeder 7. The side ends of the three dosing metering pipes 5 are connected to a dosing valve port 6. The side end of the metering feeder 7 is connected to a feeding end 28. The bottom ends of the feeding end 28 and the dosing valve port 6 are both connected to the top wall surface of the automatic feeding continuous arsenic removal reactor 1. An exhaust pipe 11 is connected to the side end of the automatic feeding continuous arsenic removal reactor 1. A gas collector 12 is installed outside the exhaust pipe 11. A discharge pipe 10 is connected to the bottom end of the precipitation area 8. A control valve 35 is installed outside the side end of the discharge pipe 10. An arsenic biosensor 36 is installed at the bottom side of the discharge pipe 10. A circulator 13 is connected to the side end of the discharge pipe 10. The bottom end of the exhaust pipe 11 and the top end of the circulator 13 are connected and set. A Tesla valve pipe 14 is connected to the side end of the exhaust pipe 11. The bottom of the Tesla valve pipe 14 is connected to a continuous flow reactor 15. Four reaction pipes 16 are connected to the peripheral side of the continuous flow reactor 15. One-way check valves 17 are installed outside the side ends of the four reaction pipes 16. A pressure reaction control end is installed on the outer surface of the four reaction pipes 16. A guiding filter gas pipe 27 is connected to the side end of the circulator 13. A stripping tower 25 is connected to the side end of the guiding filter gas pipe 27. A clean delivery gas pipe 26 is connected to the bottom side of the stripping tower 25. A treatment discharge pipe 29 is connected to the side of the stripping tower 25. An automatic adder 24 is installed outside the guiding filter gas pipe 27.

[0035] According to Figures 1-5 、 Figure 7 、 Figure 8 and Figure 9 As shown, the temperature control heating component 3 includes an outer toothed ring 301. A connecting ring frame track 302 is slidably connected to the top of the outer toothed ring 301. A side frame 303 is fixedly connected to the side end of the connecting ring frame track 302. A main support structure 9 is fixedly connected to the side end of the side frame 303. The other side end of the side frame 303 is fixedly connected to the side wall of the automatic feeding continuous arsenic removal reactor 1. A driving motor 304 is installed inside the side frame 303. When according to the change amount of the arsenic removal treatment of the automatic feeding continuous arsenic removal reactor 1, the driving motor 304 is used to drive the main driving gear 305 to rotate, and by the rotation of the main driving gear 305, the outer toothed ring 301 rotates inside the connecting ring frame track 302, thereby driving the connecting rod column 306, the vertical wire track 307, the sliding groove block 3010 and the servo motor 308 to rotate and adjust inside the annular sliding track 309.

[0036] According to Figures 1-5 、Figure 7 , Figure 8 and Figure 9 As shown in Figure 7 , Figure 8 and Figure 9 , the top output end of the drive motor 304 is connected with the main drive gear 305. The side end of the main drive gear 305 is meshed and connected with the external gear ring 301. The inner wall surface of the external gear ring 301 is fixedly connected with a connecting rod column 306. The top of the connecting rod column 306 is fixedly connected with a vertical line rail 307. The top of the vertical line rail 307 is fixedly connected with a sliding groove block 3010. A servo motor 308 is installed inside the sliding groove block 3010. The top end of the sliding groove block 3010 is slidably connected with an annular sliding rail 309. The left and right sides of the annular sliding rail 309 are fixedly connected with the surface of the main support structure 9. When the vertical line rail 307 reaches the array of multiple heat conducting rods 32 and stops, the servo motor 308 is started, so that the servo motor 308 drives the sliding saddle 3011, the microwave generation controller 3012 and the microwave heating generator 3013. Under the monitoring of the built-in temperature sensor, the microwave heating generator 3013 drives the microwave generation controller 3012 and the microwave heating generator 3013 to stop outside the generated change area. Then, the microwave generation controller 3012 adjusts the power intensity of the microwave heating generator 3013 in real time according to the reaction variables of the raw materials in the automatic feeding continuous dearsenication reactor 1, so as to generate a heat source point outside, which is convenient to cooperate with the de-materialization stirring temperature formed by the internal drying rake blades 31, distribute heat more evenly, improve the heating efficiency of the material and the reaction uniformity, help to accelerate the removal process of harmful elements in the dearsenication operation, and protect the beneficial components from damage at the same time.

[0037] According to Figures 1-5 , Figure 7 , Figure 8 and Figure 9 As shown in ,

[0037] , Figures 1-5 , Figure 7 , Figure 8 and Figure 9 , a sliding saddle 3011 is slidably connected inside the vertical line rail 307. The side end of the sliding saddle 3011 is installed with a microwave generation controller 3012. The side end of the microwave generation controller 3012 is provided with a microwave heating generator 3013. The heat source points generated by the microwave generation controller 3012 and the microwave heating generator 3013 are heat-conducted according to the distribution of the array of multiple heat conducting rods 32. When it is detected that the reaction heat changes in a certain area position, the heat conducting rods 32 can quickly conduct the heat energy to the required position according to the demand, or adjust when local heat accumulation is detected to maintain the uniform adjustment of the temperature in the reactor. When no reaction heat change is detected, it forms a uniform rotation as a whole and cooperates with the de-materialization stirring temperature formed by the drying rake blades 31 outside the automatic feeding continuous dearsenication reactor 1 for operation.

[0038] According to Figure 1 , Figure 2 , Figure 4 , Figure 5 and Figure 6As shown in the figure, a discharging drive motor 4 is installed at the top of the automatic feeding continuous dearsenification reactor 1. The bottom output end of the discharging drive motor 4 penetrates through the automatic feeding continuous dearsenification reactor 1 and is connected with a rotating rod 30. A drying rake blade 31 is installed outside the rotating rod 30. After the materials, acid solution, alkali solution, and dearsenification agent are added appropriately, start the discharging drive motor 4, and use the discharging drive motor 4 to drive the rotating rod 30 and the drying rake blade 31 to strengthen the reaction inside the automatic feeding continuous dearsenification reactor 1, increase the contact area between the materials, promote the uniform distribution of heat and reaction substances, ensure the full mixing and reaction of the materials, and improve the dearsenification efficiency.

[0039] According to Figure 6 As shown in the figure, an automatic iris valve 33 is installed inside the precipitation zone 8. An ion exchange membrane 34 is installed at the bottom of the automatic iris valve 33. An array of multiple heat conduction rods 32 is arranged around the inside of the automatic feeding continuous dearsenification reactor 1. The direction of the generating end of the microwave heating generator 3013 and the array of multiple heat conduction rods 32 are set according to the detection of the built-in temperature sensor. After the materials are processed by the precipitation zone 8, the insoluble substances are allowed to settle. By installing the automatic iris valve 33 inside the precipitation zone 8 and then installing the ion exchange membrane 34 at the bottom of the automatic iris valve 33, the ion exchange membrane 34 can effectively remove the arsenic ions in the materials discharged through the automatic iris valve 33, while reducing the loss of useful components and improving the product purity.

[0040] According to Figures 1-3 As shown in the figure, a guiding reaction tube 18 is connected to the side end of the four reaction tubes 16. A catalytic oxidizer 19 is connected to the side end of the guiding reaction tube 18. A circulating two-way tube 20 is connected to the side end of the catalytic oxidizer 19. With the cooperation of the four reaction tubes 16, the processed materials are transported to the guiding reaction tube 18 and then transported to the catalytic oxidizer 19 through the guiding reaction tube 18. Under the action of the catalyst, it will undergo a specific oxidation reaction with the processed arsenic ion materials, reducing the activation energy required for the reaction, accelerating the reaction rate, and possibly improving the selectivity and efficiency of the reaction. And under the action of the circulating two-way tube 20, when it is detected that the catalytic change amount is not reached when the catalytic arsenic ion materials are subsequently transported to the washing and adsorption tower 21, the circulating two-way tube 20 allows some of the processed arsenic ion materials to return to the catalytic oxidizer 19 again, which is beneficial to improving the utilization rate of raw materials and recovering arsenic ion materials with high catalytic purity.

[0041] According to Figure 1 and Figure 2As shown, a washing and adsorption tower 21 is connected to the side end of the circulating bidirectional pipe 20. A washing circulation pump 23 is arranged at the bottom of the washing and adsorption tower 21. Then, when the arsenic ion material is conveyed from the circulating bidirectional pipe 20 to the washing and adsorption tower 21, the arsenic ion material will contact the washing liquid or adsorbent, and separate unnecessary components through chemical or physical actions, thereby improving the purity of the final product. Moreover, the operation of the washing circulation pump 23 promotes the washing liquid to rise inside the washing and adsorption tower 21, making countercurrent contact with the descending arsenic ion material, enhancing the mass transfer efficiency, and improving the washing or adsorption effect.

[0042] According to Figure 1 and Figure 2 As shown, a detection sampling end and a discharging end 22 are respectively arranged on the side end surface of the washing and adsorption tower 21. The three dosing metering pipes 5 are respectively an acid solution dropping metering pipe, an alkali solution dropping metering pipe, and a dearsenicating agent metering pipe. The detection sampling end on the side end of the washing and adsorption tower 21 allows technicians to regularly or continuously monitor the state of the arsenic ion material in the washing and adsorption tower 21, including but not limited to key indicators such as pH value, concentration, purity, etc. Through the analysis of the sample by the built-in pH sensor, the process parameters can be adjusted in a timely manner to ensure that the treatment process meets the expected goals. The discharging end 22 discharges the treated material from the washing and adsorption tower 21 and enters the subsequent treatment or storage stage. In the overall operation, flow control valves are installed on the outer circumferences of the acid solution dropping metering pipe, the alkali solution dropping metering pipe, and the dearsenicating agent metering pipe, which is convenient to form consistency with the internal dearsenicating reaction of the above-mentioned automatic feeding continuous dearsenicating reactor 1 and the temperature control of the discharging stirring formed by the microwave heating generator 3013 and the drying rake blade 31.

[0043] The wiring diagrams of the automatic feeding continuous dearsenicating reactor 1, the driving motor 304, the microwave generation controller 3012, the microwave heating generator 3013, the discharging driving motor 4, the gas collector 12, the continuous flow reactor 15, the catalytic oxidizer 19, the washing and adsorption tower 21, the stripping tower 25, the ion exchange membrane 34, the arsenic biosensor 36, the pH sensor, and the temperature sensor in the present invention belong to the common knowledge in the art. Their working principles are already known technologies, and their models are selected according to actual use. Therefore, the control methods and wiring arrangements of the automatic feeding continuous dearsenicating reactor 1, the driving motor 304, the microwave generation controller 3012, the microwave heating generator 3013, the discharging driving motor 4, the gas collector 12, the continuous flow reactor 15, the catalytic oxidizer 19, the washing and adsorption tower 21, the stripping tower 25, the ion exchange membrane 34, the arsenic biosensor 36, the pH sensor, and the temperature sensor will not be explained in detail.

[0044] Usage method and working principle of this device: First, when performing deep arsenic removal on phosphoric acid, raw materials can be added into the automatic feeding continuous arsenic removal reactor 1 through the metering feeder 7. When based on the change amount of arsenic removal treatment in the automatic feeding continuous arsenic removal reactor 1, the driving motor 304 is used to drive the main driving gear 305 to rotate, and by using the rotation of the main driving gear 305, the outer tooth ring 301 rotates inside the connecting ring frame track 302, thereby driving the connecting rod column 306, the vertical wire rail 307, the sliding groove block 3010, and the servo motor 308 to rotate and adjust inside the annular sliding rail 309. When the vertical wire rail 307 reaches the array of multiple heat conduction rods 32 and stops, the servo motor 308 is started, so that the servo motor 308 drives the sliding saddle 3011, the microwave generation controller 3012, and the microwave heating generator 3013 to stop outside the generated change area according to the monitoring of the built-in temperature sensor. Then, the microwave generation controller 3012 adjusts the power intensity of the microwave heating generator 3013 in real time according to the reaction variable of the raw materials in the automatic feeding continuous arsenic removal reactor 1, so as to generate a heat source point outside, which is convenient to cooperate with the de-materialization stirring temperature formed by the internal drying rake blade 31, distribute heat more evenly, improve the heating efficiency of the material and the reaction uniformity, help to accelerate the removal process of harmful elements in the arsenic removal operation, and at the same time protect the beneficial components from damage. The heat source points generated by the microwave generation controller 3012 and the microwave heating generator 3013 are subjected to heat conduction treatment according to the distribution of the array of multiple heat conduction rods 32. When it is detected that the reaction heat changes in a certain area position, the heat conduction rod 32 can quickly conduct the heat energy to the required position according to the demand, or make adjustments when local heat accumulation is detected to maintain the uniform adjustment of the temperature inside the reactor. When no reaction heat change is detected, it rotates uniformly as a whole outside the automatic feeding continuous arsenic removal reactor 1 to cooperate with the de-materialization stirring temperature formed by the drying rake blade 31 for collaborative operation. Flow control valves are installed on the outer circumferences of the acid liquid dropping metering tube, the alkali liquid dropping metering tube, and the arsenic removal liquid agent metering tube, which is convenient to form consistency with the internal arsenic removal reaction in the above-mentioned automatic feeding continuous arsenic removal reactor 1 and the de-materialization stirring temperature control formed by the microwave heating generator 3013 and the drying rake blade 31. After the materials, acid liquid, alkali liquid, and arsenic removal liquid agent are added appropriately, the de-materialization driving motor 4 is started, and the de-materialization driving motor 4 drives the rotating rod 30 and the drying rake blade 31 to strengthen the reaction inside the automatic feeding continuous arsenic removal reactor 1, increase the contact area between the materials, promote the uniform distribution of heat and reaction substances, ensure the full mixing and reaction of the materials, and improve the arsenic removal efficiency. The precipitation area 8 is used to allow the insoluble substances to settle after the materials are processed. The automatic iris valve 33 is installed inside the precipitation area 8, and then the ion exchange membrane 34 is installed at the bottom of the automatic iris valve 33,The ion exchange membrane 34 effectively removes arsenic ions from the material discharged through the automatic iris valve 33, while reducing the loss of useful components and improving the product purity. Among them, the installed arsenic biosensor 36 uses the series-connected detection sensor chips to penetrate and adhere to the inner wall surface of the precipitation area 8 to the inner wall surface of the automatic feeding continuous dearsenification reactor 1, facilitating real-time monitoring of the arsenic content in the generated product. At the same time, the exhaust pipe 11 is used to discharge the gas containing arsenic medium generated during the above reaction process, so that the gas collector 12 adsorbs and guides the gas containing arsenic medium generated during the reaction to the circulator 13, and under the cooperation of the circulator 13, it is transported to the stripping tower 25 through the guiding filter gas pipe 27. Under the action of the internal ultrafiltration membrane in the stripping tower 25, the arsenic medium in the gas is processed. After processing, it is then connected to the circulator 13 through the clean guiding gas pipe 26. Then, the processed material is guided from the discharge pipe 10 to the continuous flow reactor 15 through the Tesla valve pipe 14, and according to the cooperation of the four groups of reaction tubes 16 and the one-way check valve 17, the processing efficiency is improved. With the cooperation of the four groups of reaction tubes 16, the processed material is transported to the guiding reaction tube 18 and then transported to the catalytic oxidizer 19 through the guiding reaction tube 18. Under the action of the catalyst, it will undergo a specific oxidation reaction with the processed arsenic ion material, reducing the activation energy required for the reaction, accelerating the reaction rate, and possibly improving the selectivity and efficiency of the reaction. And under the action of the circulating bidirectional pipe 20, when it is detected that the catalytic change amount is not reached when the subsequent catalytic arsenic ion material is transported to the washing and adsorption tower 21, the circulating bidirectional pipe 20 allows some of the processed arsenic ion material to return to the catalytic oxidizer 19 again, which is beneficial to improving the utilization rate of raw materials and recovering the arsenic ion material with high catalytic purity. Then, when the arsenic ion material is guided from the circulating bidirectional pipe 20 to the washing and adsorption tower 21, the arsenic ion material will contact the washing liquid or adsorbent, and the unnecessary components are separated through chemical or physical actions, thereby improving the purity of the final product. And the operation of the washing circulation pump 23 promotes the washing liquid to rise in the washing and adsorption tower 21, countercurrently contacting the descending arsenic ion material, enhancing the mass transfer efficiency, and improving the washing or adsorption effect.,

[0045] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A deep arsenic removal device for phosphoric acid, characterized in that: It includes an automatic feeding continuous dearsenication reactor (1). A precipitation area (8) is installed at the bottom of the automatic feeding continuous dearsenication reactor (1). A top sealing flange (2) is installed at the top of the automatic feeding continuous dearsenication reactor (1). A temperature control heating component (3) is installed on the outer peripheral side of the automatic feeding continuous dearsenication reactor (1). A metering feeder (7) is installed on the top surface of the automatic feeding continuous dearsenication reactor (1). Three dosing metering pipes (5) are respectively connected to the side end of the metering feeder (7). The side ends of the three dosing metering pipes (5) are connected to a dosing valve port (6). The side end of the metering feeder (7) is connected to a feeding end (28). The bottom ends of the feeding end (28) and the dosing valve port (6) are both connected to the top wall surface of the automatic feeding continuous dearsenication reactor (1). An exhaust pipe (11) is connected to the side end of the automatic feeding continuous dearsenication reactor (1). A gas collector (12) is installed outside the exhaust pipe (11). A discharge pipe (10) is connected to the bottom end of the precipitation area (8). A control valve (35) is installed outside the side end of the discharge pipe (10). An arsenic biosensor (36) is installed at the bottom side of the discharge pipe (10). A circulator (13) is connected to the side end of the discharge pipe (10). The bottom end of the exhaust pipe (11) and the top end of the circulator (13) are connected and arranged. A Tesla valve pipe (14) is connected to the side end of the exhaust pipe (11). The bottom of the Tesla valve pipe (14) is connected to a continuous flow reactor (15). Four reaction pipes (16) are connected to the periphery of the continuous flow reactor (15). One-way check valves (17) are installed outside the side ends of the four reaction pipes (16). A pressure reaction control end is installed on the outer surface of the four reaction pipes (16). A guiding filter air pipe (27) is connected to the side end of the circulator (13). The side end of the guiding filter air pipe (27) is connected to an air stripping tower (25). A clean guiding air pipe (26) is connected to the bottom side of the side end of the air stripping tower (25). A treatment discharge pipe (29) is connected to the side of the air stripping tower (25). An automatic adder (24) is installed outside the guiding filter air pipe (27); The temperature control heating component (3) includes an outer toothed ring (301). A connecting ring frame track (302) is slidably connected to the top of the outer toothed ring (301). A side frame (303) is fixedly connected to the side end of the connecting ring frame track (302). A main support structure (9) is fixedly connected to the side end of the side frame (303). The other side end of the side frame (303) is fixedly connected to the side wall of the automatic feeding continuous dearsenication reactor (1). A driving motor (304) is installed inside the side frame (303); The top output end of the driving motor (304) is connected with a main driving gear (305) arranged thereon. The side end of the main driving gear (305) is meshed and connected with an external toothed ring (301). A connecting rod column (306) is fixedly connected to the inner wall surface of the external toothed ring (301). The top of the connecting rod column (306) is fixedly connected with a vertical linear guide (307). The top of the vertical linear guide (307) is fixedly connected with a sliding groove block (3010). A servo motor (308) is installed inside the sliding groove block (3010). The top end of the sliding groove block (3010) is slidably connected with an annular sliding rail (309). The left and right sides of the annular sliding rail (309) are fixedly connected to the surface of the main support structure (9). A sliding saddle (3011) is slidably connected inside the vertical linear guide (307). A microwave generation controller (3012) is installed at the side end of the sliding saddle (3011). A microwave heating generator (3013) is arranged at the side end of the microwave generation controller (3012).

2. The deep arsenic removal device for phosphoric acid according to claim 1, wherein: A discharging driving motor (4) is installed at the top of the automatic feeding continuous arsenic removal reactor (1). The bottom output end of the discharging driving motor (4) penetrates through the automatic feeding continuous arsenic removal reactor (1) and is connected with a rotating rod (30). A drying rake blade (31) is installed on the outside of the rotating rod (30).

3. The deep arsenic removal device for phosphoric acid according to claim 2, wherein: An automatic iris valve (33) is installed inside the precipitation area (8). An ion exchange membrane (34) is installed at the bottom of the automatic iris valve (33). An array of multiple groups of heat conducting rods (32) is arranged around the inside of the automatic feeding continuous arsenic removal reactor (1). The direction of the generating end of the microwave heating generator (3013) and the array of multiple groups of heat conducting rods (32) are arranged according to the detection of the built-in temperature sensor.

4. The deep arsenic removal device for phosphoric acid according to claim 3, characterized in that: Four reaction tubes (16) are communicated with a guiding reaction tube (18) at the side end. The guiding reaction tube (18) is communicated with a catalytic oxidizer (19) at the side end. The catalytic oxidizer (19) is communicated with a circulating two-way tube (20) at the side end.

5. The deep arsenic removal device for phosphoric acid according to claim 4, characterized in that: The circulating two-way tube (20) is communicated with a washing adsorption tower (21) at the side end. A washing circulating pump (23) is arranged at the bottom of the washing adsorption tower (21).

6. The deep arsenic removal device for phosphoric acid according to claim 5, characterized in that: A detection sampling end and a discharging end (22) are respectively arranged on the side surface of the washing adsorption tower (21). The three dosing metering tubes (5) are respectively an acid solution dropping metering tube, an alkali solution dropping metering tube and an arsenic removal liquid agent metering tube.

7. The arsenic removal process of a deep arsenic removal device for phosphoric acid, characterized in that, Using the phosphoric acid deep arsenic removal device according to claim 6, comprising the following steps: S1. First, raw materials are added into the automatic feeding continuous arsenic removal reactor (1) through a metering feeder (7). Then, with the cooperation of the temperature control heating component (3), it can be automatically adjusted according to the reaction rate monitored by the arsenic biosensor (36) and the change amount of arsenic materials. After the raw materials enter, the feeding drive motor (4) drives the rotating rod (30) and the drying rake blades (31) to rotate the raw materials. At the same time, with the cooperation of the three dosing metering tubes (5) and the injection valve ports (6), the acid liquid dosing, the alkali liquid dosing, and the arsenic removal liquid agent dosing are added sequentially according to requirements. S2. Next, during the internal reaction operation of the automatic feeding continuous arsenic removal reactor (1), the gas collector (12) adsorbs and guides the gas containing arsenic medium generated during the reaction to the circulator (13). With the cooperation of the circulator (13), it is transported to the stripping tower (25) through the guiding and filtering gas pipe (27). After treatment, it is then connected to the circulator (13) through the clean guiding gas pipe (26). S3. After that, the treated material is guided from the discharge pipe (10) to the continuous flow reactor (15) through the Tesla valve pipe (14). With the cooperation of the four reaction tubes (16) and the one-way check valve (17), it is convenient to improve the treatment efficiency. S4. Then, through the connection of the guiding reaction tube (18) and the four reaction tubes (16), the material to be treated again is transported to the catalytic oxidizer (19) and is guided to the washing and adsorption tower (21) through the circulating two-way pipe (20) for operation.

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