Phosphoric acid filtering and purifying device

Abstract

The utility model is suitable for phosphoric acid processing and handling technical field provides a kind of phosphoric acid filtration and purification device, including the treatment box for carrying out filtration and purification processing to wet-process phosphoric acid slurry;First filter screen and second filter screen for carrying out filtration treatment to the size impurity in wet-process phosphoric acid slurry are assembled in the treatment box, and the treatment box, the first filter screen and the second filter screen are provided with the material cleaning mechanism for cleaning and discharging the impurity filtered on the first filter screen and the second filter screen;Stirring frame is assembled in the treatment box, and the treatment box and the stirring frame are provided with stirring mechanism for driving the stirring frame rotation to stir phosphoric acid liquid and additive after impurity removal.The phosphoric acid filtration and purification device provided in the scheme can filter and purify wet-process phosphoric acid slurry, and the filtered impurities can be discharged and subjected to corresponding cleaning treatment, reducing the subsequent cleaning burden of workers.

Description

Technical Field

[0001] This utility model belongs to the field of phosphoric acid processing technology, and in particular relates to a phosphoric acid filtration and purification device. Background Technology

[0002] The wet process for producing phosphoric acid involves using phosphate rock as raw material and extracting phosphoric acid through an acid hydrolysis reaction.

[0003] After acid hydrolysis, a reaction slurry containing phosphoric acid, gypsum, and other impurities is obtained. When processing this slurry, a suitable filtration and purification device is needed. The gypsum solids in the slurry are separated through the filter screen to obtain phosphoric acid liquid. Then, appropriate additives are added to the phosphoric acid liquid to purify it. However, some existing filtration and purification devices are inconvenient for processing impurities filtered through the filter screen and for cleaning the filter screen, making them rather cumbersome to use. Utility Model Content

[0004] This invention provides a phosphoric acid filtration and purification device, which aims to solve the problems mentioned in the background art regarding the inconvenience of processing impurities filtered on the filter screen and cleaning the filter screen in the currently used phosphoric acid filtration and purification devices.

[0005] To solve the above problems, this utility model is implemented as follows: a phosphoric acid filtration and purification device includes: a processing box for filtering and purifying wet-process phosphoric acid slurry; a first filter screen and a second filter screen installed in the processing box for filtering impurities of various sizes in the wet-process phosphoric acid slurry, and a cleaning mechanism provided in the processing box for cleaning and unloading the impurities filtered on the first filter screen and the second filter screen; a stirring rack installed in the processing box and located below the first filter screen and the second filter screen, and a stirring mechanism provided on the processing box and the stirring rack for driving the stirring rack to rotate and stir the purified phosphoric acid solution and additives; and a cleaning mechanism installed on the processing box for cleaning the first filter screen and the second filter screen.

[0006] Preferably, the cleaning mechanism includes: two horizontally rotatably mounted on the processing box, the two mounting shafts being fixedly connected to a first filter screen and a second filter screen respectively; a first servo motor fixedly mounted on one side outer wall of the processing box, the output shaft of the first servo motor being fixedly connected to one end of one of the mounting shafts; and two first synchronous pulleys fixedly sleeved on the two mounting shafts respectively, with a first synchronous belt sleeved on the two first synchronous pulleys.

[0007] Preferably, the stirring mechanism includes: a second servo motor fixedly installed on the outer wall of one side of the processing tank; a connecting shaft rotatably installed on the processing tank, one end of the connecting shaft being fixedly connected to the output shaft of the second servo motor, and the other end of the connecting shaft and the stirring frame being fixedly fitted with mutually meshing bevel gears.

[0008] Preferably, the cleaning mechanism includes: a placement tube that is vertically fixedly installed on the outer wall of one side of the treatment box, with two hoses connected to both ends of the placement tube; and two cleaning tubes that are horizontally rotatably installed inside the treatment box and located above the first filter screen and the second filter screen, respectively. The cleaning tubes have multiple water outlets, and the two cleaning tubes are respectively connected to the two hoses. The water sprayed from the two cleaning tubes is used to clean the first filter screen and the second filter screen, respectively.

[0009] Preferably, the treatment box is provided with an adjustment mechanism for adjusting the angle of water spray from the cleaning pipe. The adjustment mechanism includes: a third servo motor fixedly installed on the outer wall of one side of the treatment box, the output shaft of the third servo motor being fixedly connected to one end of one of the cleaning pipes; and two second synchronous pulleys respectively fixedly sleeved on the two cleaning pipes, with a second synchronous belt sleeved on the two second synchronous pulleys.

[0010] Preferably, the treatment box is equipped with a booster pump, and a bent pipe located above the first filter screen is fixedly installed on the treatment box. The bent pipe is connected to the booster pump, and the booster pump is used to pressurize the treatment box during the filtration of wet phosphate slurry.

[0011] Preferably, a feeding pipe is fixedly installed on the treatment box below the second filter screen. The feeding pipe puts the additive into the treatment box to react and purify with the phosphoric acid solution. A protective cover that accommodates multiple water outlets is fixedly installed on the cleaning pipe. An inlet pipe and a outlet pipe are respectively provided at the top and bottom of the treatment box.

[0012] Compared with related technologies, the phosphoric acid filtration and purification device provided by this utility model has the following beneficial effects: Compared with existing technologies, the phosphoric acid filtration and purification device provided in this solution can filter and purify wet phosphoric acid slurry, and can also unload the filtered impurities and clean the first and second filter screens, reducing the subsequent cleaning burden on workers. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the main structure of a phosphoric acid filtration and purification device provided by this utility model; Figure 2 This is a schematic diagram of the front sectional view of the present invention; Figure 3 for Figure 2 An enlarged structural diagram of part A shown in the figure; Figure 4 for Figure 2 The diagram shows an enlarged view of part B.

[0014] Reference numerals: 1. Processing box; 2. First filter screen; 3. Second filter screen; 4. Stirring rack; 5. Mounting shaft; 6. First servo motor; 7. First synchronous pulley; 8. First synchronous belt; 9. Second servo motor; 10. Connecting shaft; 11. Placement tube; 12. Hose; 13. Cleaning tube; 14. Third servo motor; 15. Second synchronous pulley; 16. Second synchronous belt; 17. Booster pump; 18. Bend; 19. Feeding tube; 20. Protective cover. Detailed Implementation

[0015] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings are used to distinguish different objects, not to describe a particular order; the terms "inner," "outer," "left," and "right" indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0016] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0017] This utility model embodiment provides a phosphoric acid filtration and purification device, such as... Figure 1-4As shown, the phosphoric acid filtration and purification device includes: a processing tank 1 for filtering and purifying wet-process phosphoric acid slurry; a first filter screen 2 and a second filter screen 3 installed in the processing tank 1 for filtering impurities of various sizes in the wet-process phosphoric acid slurry, and a cleaning mechanism for cleaning and unloading the impurities filtered on the first filter screen 2 and the second filter screen 3; a stirring rack 4 installed in the processing tank 1 and located below the first filter screen and the second filter screen, and a stirring mechanism for driving the stirring rack 4 to rotate and stir the purified phosphoric acid solution and additives; and a cleaning mechanism installed on the processing tank 1 for cleaning the first filter screen 2 and the second filter screen 3.

[0018] In this embodiment, a controller of model OMRON E5CC-QX2ASM-800 is first installed on one side of the device. The controller can control the entire device. The working principle of the controller is existing technology and will not be described in detail here. When filtering and purifying the wet phosphoric acid slurry, the wet phosphoric acid slurry is placed into the treatment tank 1. The solid gypsum and impurities of various sizes in the wet phosphoric acid slurry can be filtered through the first filter screen 2 and the second filter screen 3 to obtain phosphoric acid solution. The phosphoric acid solution falls to the bottom of the treatment tank 1. Then, the corresponding additives are put into the treatment tank 1. The controller starts the stirring mechanism to drive the stirring frame 4 to rotate, mixing and reacting the phosphoric acid solution and the reactant, thereby purifying the phosphoric acid solution. The liquid is purified, and then the purified phosphoric acid solution is discharged from the treatment tank 1 for further processing. When it is necessary to clean the impurities filtered on the first filter screen 2 and the second filter screen 3, the cleaning mechanism is activated by the controller to rotate the first filter screen 2 and the second filter screen 3, thereby unloading the filtered impurities. After unloading, the first filter screen 2 and the second filter screen 3 can be cleaned by the cleaning mechanism. This device can filter and purify wet phosphoric acid slurry, unload the filtered impurities, and clean the first filter screen 2 and the second filter screen 3, reducing the subsequent cleaning burden on the staff.

[0019] In a further preferred embodiment of the present invention, the cleaning mechanism includes: two mounting shafts 5 horizontally rotatably mounted on the processing box 1, the two mounting shafts 5 being fixedly connected to the first filter screen 2 and the second filter screen 3 respectively; a first servo motor 6 fixedly mounted on the outer wall of one side of the processing box 1, the output shaft of the first servo motor 6 being fixedly connected to one end of one of the mounting shafts 5; and two first synchronous pulleys 7 respectively fixedly sleeved on the two mounting shafts 5, the two first synchronous pulleys 7 being sleeved with a first synchronous belt 8.

[0020] In this embodiment, when using the cleaning mechanism, the controller starts the first servo motor 6 to rotate at a certain angle. The first servo motor 6 drives one of the mounting shafts 5 to rotate. Then, the transmission action of the first synchronous pulley 7 and the first synchronous belt 8 is used to make the two mounting shafts 5 rotate synchronously, thereby driving the first filter screen 2 and the second filter screen 3 to rotate synchronously at a certain angle, so as to unload the impurities that can be filtered on the first filter screen 2 and the second filter screen 3. The cleaning is convenient and simple, providing convenience for the staff.

[0021] In a further preferred embodiment of the present invention, the stirring mechanism includes: a second servo motor 9 fixedly installed on the outer wall of one side of the processing tank 1; a connecting shaft 10 rotatably installed on the processing tank 1, one end of the connecting shaft 10 being fixedly connected to the output shaft of the second servo motor 9, and the other end of the connecting shaft 10 and the stirring frame 4 being fixedly fitted with mutually meshing bevel gears.

[0022] In this embodiment, when using the stirring mechanism, the second servo motor 9 is activated by the controller to drive the connecting shaft 10 to rotate. The power is then transmitted to the stirring frame 4 via meshing bevel gears. The rotating stirring frame 4 stirs the purified phosphoric acid solution and additives, helping to fully mix the additives and phosphoric acid solution, thereby purifying the phosphoric acid solution. To prevent the bevel gears from being contaminated by the phosphoric acid solution and additives, a protective shell can be installed on the top of the stirring frame. The connecting shaft extends into the protective shell, allowing the bevel gears on the connecting shaft to mesh with the bevel gears on the stirring frame.

[0023] In a further preferred embodiment of this utility model, the cleaning mechanism includes: a placement pipe 11 vertically fixedly installed on the outer wall of one side of the treatment box 1, with two hoses 12 connected to both ends of the placement pipe 11; and two cleaning pipes 13 horizontally rotatably installed inside the treatment box 1 and respectively located above the first filter screen and the second filter screen, with multiple water outlets on the cleaning pipes 13, and the two cleaning pipes 13 respectively connected to the two hoses 12, and the water sprayed from the two cleaning pipes 13 is used to clean the first filter screen 2 and the second filter screen 3 respectively.

[0024] In this embodiment, when using the cleaning mechanism, the placement pipe 11 and the corresponding pump source pipe are connected. The cleaning water is transported to the cleaning pipe 13 through the placement pipe 11 and the hose 12, and then sprayed out from multiple outlets on the cleaning pipe 13 to clean the first filter screen 2 and the second filter screen 3, and also to clean the inside of the treatment box 1.

[0025] In a further preferred embodiment of the present invention, the processing box 1 is provided with an adjustment mechanism for adjusting the angle of water spraying from the cleaning pipe 13. The adjustment mechanism includes: a third servo motor 14 fixedly installed on the outer wall of one side of the processing box 1, the output shaft of the third servo motor 14 being fixedly connected to one end of one of the cleaning pipes 13; and two second synchronous pulleys 15 respectively fixedly sleeved on the two cleaning pipes 13, with a second synchronous belt 16 sleeved on the two second synchronous pulleys 15.

[0026] In this embodiment, when using the adjustment mechanism, the controller starts the third servo motor 14 to rotate forward and backward at a certain angle. The third servo motor 14 drives one of the cleaning pipes 13 to rotate. Then, by utilizing the transmission action of the second synchronous pulley 15 and the second synchronous belt 16, the two cleaning pipes 13 rotate back and forth synchronously at a certain angle. The deformability of the hose ensures the normal delivery of water spray, thereby realizing the adjustment of the water spray angle of the cleaning pipe 13. This allows the cleaning pipe 13 to perform comprehensive and effective cleaning of the first filter screen 2 and the second filter screen 3, improving the cleaning effect.

[0027] In a further preferred embodiment of the present invention, a booster pump 17 is provided on the processing tank 1, and a bent pipe 18 located above the first filter screen is fixedly installed on the processing tank 1. The bent pipe 18 is connected to the booster pump 17, and the booster pump 17 is used to pressurize the processing tank 1 when filtering wet phosphate slurry.

[0028] In this embodiment, when filtering wet phosphate slurry, the booster pump 17 is started by the controller. With the cooperation of the bend pipe 18, the processing tank 1 is pressurized. Under the pressure, the wet phosphate slurry can pass through the first filter screen 2 and the second filter screen 3 more quickly, reducing the filtration time and improving the filtration efficiency.

[0029] In a further preferred embodiment of this utility model, a feeding pipe 19 located below the second filter screen is fixedly installed on the treatment box 1. The feeding pipe 19 puts the additive into the treatment box 1 to react and purify with the phosphoric acid solution. A protective cover 20 that accommodates multiple water outlets is fixedly installed on the cleaning pipe 13. The protective cover 20 is used to protect the water outlets on the cleaning pipe 13. An inlet pipe and a discharge pipe are respectively provided at the top and bottom of the treatment box 1.

[0030] In this embodiment, the additive is conveniently placed into the treatment tank 1 through the feeding pipe 19. At the same time, when pressurizing the treatment tank 1, the feeding pipe 19 needs to be opened. The outlet of the cleaning pipe 13 can be protected by the protective cover 20. When filtering wet phosphoric acid slurry, the outlet faces downward. The protective cover 20 can protect the outlet to prevent impurities from entering the outlet during filtration. The feed pipe and discharge pipe are respectively set at the top and bottom of the treatment tank 1, which facilitates the input of slurry and the output of purified phosphoric acid solution.

[0031] In summary, compared with related technologies, this device can filter and purify wet-process phosphoric acid slurry, unload the filtered impurities, and clean the first filter screen 2 and the second filter screen 3, reducing the subsequent cleaning burden on workers.

[0032] It should be understood, in the several embodiments provided in this application, that the disclosed apparatus may be implemented in other ways.

[0033] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Although this utility model has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of this utility model according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of this utility model. These technical solutions are also within the scope of protection of this utility model.

Claims

1. A phosphoric acid filtration and purification apparatus, characterized by, include: A processing tank for filtering and purifying wet-process phosphoric acid slurry; a first filter screen and a second filter screen installed inside the processing tank for filtering impurities of various sizes in the wet-process phosphoric acid slurry; a cleaning mechanism inside the processing tank for cleaning and unloading the impurities filtered on the first and second filter screens; a stirring rack installed inside the processing tank and located below the first and second filter screens; a stirring mechanism on the processing tank and the stirring rack for driving the stirring rack to rotate and stir the purified phosphoric acid solution and additives; and a cleaning mechanism installed on the processing tank for cleaning the first and second filter screens.

2. The phosphoric acid filter purification device of claim 1, wherein, The cleaning mechanism includes: two horizontally rotatably mounted on the processing box, the two mounting shafts being fixedly connected to a first filter screen and a second filter screen respectively; a first servo motor fixedly mounted on one side of the outer wall of the processing box, the output shaft of the first servo motor being fixedly connected to one end of one of the mounting shafts; and two first synchronous pulleys fixedly sleeved on the two mounting shafts respectively, with a first synchronous belt sleeved on the two first synchronous pulleys.

3. The phosphoric acid filter purification device of claim 1, wherein, The stirring mechanism includes: a second servo motor fixedly installed on the outer wall of one side of the processing tank; and a connecting shaft rotatably installed on the processing tank, one end of the connecting shaft being fixedly connected to the output shaft of the second servo motor, and the other end of the connecting shaft and the stirring frame being fixedly fitted with mutually meshing bevel gears.

4. The phosphoric acid filter purification device of claim 1, wherein, The cleaning mechanism includes: a placement tube that is vertically fixedly installed on the outer wall of one side of the treatment box, with two hoses connected to both ends of the placement tube; and two cleaning tubes that are horizontally rotatably installed inside the treatment box and located above the first filter screen and the second filter screen, respectively. The cleaning tubes have multiple water outlets, and the two cleaning tubes are respectively connected to the two hoses. The water sprayed from the two cleaning tubes is used to clean the first filter screen and the second filter screen, respectively.

5. The phosphoric acid filter purification device of claim 4, wherein, The treatment box is equipped with an adjustment mechanism for adjusting the angle of water spray from the cleaning pipes. The adjustment mechanism includes: a third servo motor fixedly installed on the outer wall of one side of the treatment box, the output shaft of the third servo motor being fixedly connected to one end of one of the cleaning pipes; and two second synchronous pulleys respectively fixedly sleeved on the two cleaning pipes, with a second synchronous belt sleeved on the two second synchronous pulleys.

6. The phosphoric acid filter purification device of claim 1, wherein, The processing tank is equipped with a booster pump, and a bent pipe is fixedly installed on the processing tank above the first filter screen. The bent pipe is connected to the booster pump, which is used to pressurize the processing tank when filtering wet phosphate slurry.

7. The phosphoric acid filter purification device of claim 4, wherein, The treatment box is fixedly equipped with a feeding pipe located below the second filter screen. The feeding pipe puts the additive into the treatment box to react and purify with the phosphoric acid solution. The cleaning pipe is fixedly equipped with a protective cover that accommodates multiple water outlets. The top and bottom of the treatment box are respectively provided with a feed pipe and a discharge pipe.

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