Device for purifying wet-process phosphoric acid by extraction method

Abstract

The utility model is applicable to the technical field of wet-process phosphoric acid processing, and provides a device for purifying wet-process phosphoric acid by an extraction method, which comprises an extraction tank, the extraction tank is used for extracting and purifying wet-process phosphoric acid, the wet-process phosphoric acid is provided with a heating plate, the heating plate is used for heating the inside of the extraction tank, and the heating plate is used for heating the inside of the extraction tank. A sealing cover is arranged on the extraction tank; the extraction and purification cavity is formed in the extraction tank and is used for extracting and purifying wet-process phosphoric acid; the guide hopper is fixedly mounted in the extraction tank, the guide hopper is communicated with the extraction and purification cavity, and the guide hopper is used for guiding the raw materials in the extraction and purification cavity. According to the device for purifying the wet-process phosphoric acid through the extraction method, the wet-process phosphoric acid can be subjected to extraction and purification operation, impurities in the extracted and purified wet-process phosphoric acid solution can be rapidly filtered, subsequent operation steps are reduced, and the overall processing efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of wet-process phosphoric acid processing, and particularly relates to a device for purifying wet-process phosphoric acid by an extraction method. Background Art

[0002] Wet-process phosphoric acid generally refers to phosphoric acid obtained by decomposing phosphate rock with sulfuric acid, nitric acid or hydrochloric acid, and the method of decomposing phosphate rock with sulfuric acid is the most basic method in the production of wet-process phosphoric acid.

[0003] In the process of processing wet-process phosphoric acid, some impurities doped in wet-process phosphoric acid, such as iron, aluminum, etc., need to be extracted and purified with a solvent to improve the purity of wet-process phosphoric acid. Therefore, a corresponding device for purifying wet-process phosphoric acid by an extraction method is required. However, some existing devices for purifying wet-process phosphoric acid by an extraction method cannot filter the impurities generated during the extraction process after extracting and purifying wet-process phosphoric acid, so subsequent separate operations are still required, which reduces the overall processing efficiency. Summary of the Utility Model

[0004] The utility model provides a device for purifying wet-process phosphoric acid by an extraction method, aiming to solve the problem that the existing device for purifying wet-process phosphoric acid by an extraction method cannot filter the impurities generated during the extraction process as proposed in the above background art.

[0005] To solve the above problems, the utility model is realized as follows: A device for purifying wet-process phosphoric acid by an extraction method includes: an extraction tank for performing extraction and purification treatment on wet-process phosphoric acid; a heating plate arranged on the upper part of the inner wall of the extraction tank for heating the inside of the extraction tank; a sealing cover arranged on the top of the extraction tank; an extraction and purification chamber opened in the upper part of the extraction tank for performing extraction and purification operations on wet-process phosphoric acid; a filtering chamber opened in the lower part of the extraction tank; a material guiding hopper fixedly installed in the extraction tank for communicating the extraction and purification chamber and the filtering chamber, and the material guiding hopper is used for guiding the raw materials in the extraction and purification chamber to the filtering chamber; a filtering plate arranged in the filtering chamber for filtering the wet-process phosphoric acid after extraction and purification in the extraction and purification chamber; a flipping mechanism arranged on the filtering chamber and the filtering plate for driving the filtering plate to flip; a discharging mechanism assembled on the extraction tank for discharging the raw materials in the extraction tank.

[0006] Preferably, the flipping mechanism includes: a servo motor fixedly installed on the outer wall of one side of the extraction tank; a mounting shaft rotatably installed on the extraction tank, one end of the mounting shaft is fixedly connected with the output shaft of the servo motor, and the other end of the mounting shaft is fixedly connected with the filtering plate.

[0007] Preferably, the discharging mechanism includes: a booster pump fixedly installed on the top of the sealing cover, a horizontal pipe fixedly installed on the booster pump; a vertical pipe fixedly installed on the sealing cover, the vertical pipe communicating with the horizontal pipe; a connecting pipe fixedly installed on the inner wall of the sealing cover, the connecting pipe communicating with the vertical pipe, and a plurality of through holes facing the extraction and purification chamber are formed in the connecting pipe.

[0008] Preferably, an installation pipe is fixedly installed on the vertical pipe, and control valves are arranged on both the installation pipe and the horizontal pipe, and the control valves are used to control the installation pipe and the horizontal pipe.

[0009] Preferably, a mixing mechanism is arranged in the extraction tank, and the mixing mechanism is used to mix the wet-process phosphoric acid solution and the corresponding extraction solvent in the extraction tank. The mixing mechanism includes: a stirring frame rotatably installed in the extraction and purification chamber; a driving motor fixedly installed on the outer wall of one side of the extraction tank; a connecting shaft rotatably installed on the extraction tank, one end of the connecting shaft being fixedly connected to the output shaft of the driving motor; and two bevel gears fixedly sleeved on the connecting shaft and the stirring frame respectively, and the two bevel gears mesh with each other.

[0010] Preferably, a material turning frame is fixedly installed at the bottom of the stirring frame, and the material turning frame is used to turn the raw materials at the bottom of the extraction and purification chamber. An installation cavity is formed on the inner wall of the extraction tank, and a heat dissipation pipe is arranged in the installation cavity.

[0011] Preferably, a discharging pipe is arranged at the bottom of the extraction tank, the discharging pipe communicates with the filtering chamber, and operation valves are arranged on both the discharging pipe and the guiding hopper. The operation valves are used to control the discharging pipe and the guiding hopper. A feeding pipe is arranged on one side of the extraction tank.

[0012] Compared with the related art, the device for purifying wet-process phosphoric acid by extraction provided by the present invention has the following beneficial effects:

[0013] Compared with the prior art, the device for purifying wet-process phosphoric acid by extraction provided by this solution:

[0014] The device for purifying wet-process phosphoric acid by extraction is formed by an extraction tank, a heating plate, a sealing cover, an extraction and purification chamber, a guiding hopper, a filtering chamber, a filtering plate, a turning mechanism, a discharging mechanism, an installation pipe, a mixing mechanism, a material turning frame, an installation cavity and a heat dissipation pipe, which can perform extraction and purification operations on wet-process phosphoric acid, and can quickly filter the impurities in the wet-process phosphoric acid solution after extraction and purification, reduce subsequent operation steps, and improve the overall processing efficiency. Description of the Drawings

[0015] Figure 1It is the front view structural schematic diagram of a device for purifying wet-process phosphoric acid by extraction method provided by the present utility model;

[0016] Figure 2 It is the front view sectional structural schematic diagram of the present utility model;

[0017] Figure 3 It is Figure 2 the enlarged structural schematic diagram of part A shown in

[0018] Figure 4 It is Figure 2 the enlarged structural schematic diagram of part B shown in

[0019] Figure 5 It is Figure 2 the enlarged structural schematic diagram of part C shown in

[0020] Reference numerals: 1, extraction tank; 101, heating plate; 102, sealing cover; 2, extraction and purification chamber; 3, feeding hopper; 4, filtration chamber; 5, filter plate; 6, flipping mechanism; 601, servo motor; 602, mounting shaft; 7, discharging mechanism; 701, booster pump; 702, horizontal pipe; 703, vertical pipe; 704, connecting pipe; 8, mounting pipe; 9, stirring frame; 10, driving motor; 11, connecting shaft; 12, bevel gear; 13, material turning frame; 14, mounting cavity; 15, heat dissipation pipe. Detailed implementation manners

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs; the terms used in the description of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the description and claims of this application and the above accompanying drawings are intended to cover non-exclusive inclusion. The terms "first", "second", etc. in the description and claims of this application or the above accompanying drawings are used to distinguish different objects and are not used to describe a specific order; the terms "inside", "outside", "left", "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0022] References to "embodiments" in this document mean that the specific features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0023] An embodiment of the present utility model provides a device for purifying wet-process phosphoric acid by an extraction method, as Figures 1-5 shown. The device for purifying wet-process phosphoric acid by an extraction method includes: an extraction tank 1 for performing extraction and purification treatment on wet-process phosphoric acid. A heating plate 101 is provided on the upper part of the inner wall of the extraction tank 1 for heating the inside of the extraction tank 1. A sealing cover 102 is provided at the top of the extraction tank 1; an extraction and purification chamber 2 is provided in the upper part of the extraction tank 1 for performing extraction and purification operations on wet-process phosphoric acid; a filtration chamber 4 is provided in the lower part of the extraction tank 1, and a material guiding hopper 3 is fixedly installed in the extraction tank 1. The material guiding hopper 3 connects the extraction and purification chamber 2 and the filtration chamber, and is used for guiding the raw materials in the extraction and purification chamber 2 into the filtration chamber; a filter plate 5 is provided in the filtration chamber 4 for filtering the wet-process phosphoric acid after extraction and purification in the extraction and purification chamber 2; a flipping mechanism 6 is provided on the filtration chamber 4 and the filter plate 5 for driving the filter plate 5 to flip; a discharging mechanism 7 is assembled on the extraction tank 1 for discharging the raw materials in the extraction tank 1.

[0024] In this embodiment, the wet-process phosphoric acid solution to be extracted and purified and the corresponding extraction solvent (for example, a mixture of tributyl phosphate and kerosene) are placed into the extraction tank 1. According to the actual usage situation, the extraction tank 1 is heated by the heating plate 101. When extracting and purifying the wet-process phosphoric acid, the mixing mechanism is started through the controller (a controller is arranged on one side of the extraction tank 1 for control operations) to fully mix the wet-process phosphoric acid and the extraction solvent. After the wet-process phosphoric acid is extracted and purified, since phosphoric acid is soluble in the solvent while other impurities such as iron and aluminum are not extracted. When treating the impurities in the extracted and purified wet-process phosphoric acid, the guide hopper 3 is opened, and the extracted and purified wet-process phosphoric acid is discharged into the filtration chamber 4. Under the action of the filter plate 5, the impurities in the extracted wet-process phosphoric acid solution can be filtered. During filtration, the discharging mechanism 7 is started through the controller, so that the extracted wet-process phosphoric acid solution can be pressurized, thereby improving the filtration efficiency. When the filtration is completed and the impurities filtered on the filter plate 5 need to be cleaned, the turnover mechanism 6 is started through the controller to drive the filter plate 5 to turn by a certain angle, so that the filtered impurities can be quickly cleaned. During the whole operation process, the wet-process phosphoric acid can be extracted and purified, and the impurities in the extracted and purified wet-process phosphoric acid solution can be quickly filtered, reducing subsequent operation steps and improving the overall processing efficiency.

[0025] In a further preferred embodiment of the present utility model, the turnover mechanism 6 includes: a servo motor 601 fixedly installed on the outer wall of one side of the extraction tank 1; a mounting shaft 602 rotatably installed on the extraction tank 1, one end of the mounting shaft 602 is fixedly connected to the output shaft of the servo motor 601, and the other end of the mounting shaft 602 is fixedly connected to the filter plate 5.

[0026] In this embodiment, when using the turnover mechanism 6, the servo motor 601 is started through the controller to drive the mounting shaft 602 to rotate, thereby driving the filter plate 5 to turn by a certain angle, so that the filtered impurities can be quickly cleaned, and the material cleaning efficiency is high.

[0027] In a further preferred embodiment of the present utility model, the discharging mechanism 7 includes: a booster pump 701 fixedly installed on the top of the sealing cover 102, a horizontal pipe 702 fixedly installed on the booster pump 701; a vertical pipe 703 fixedly installed on the sealing cover 102, the vertical pipe 703 is communicated with the horizontal pipe 702; a connecting pipe 704 fixedly installed on the inner wall of the sealing cover 102, the connecting pipe 704 is communicated with the vertical pipe 703, and a plurality of through holes facing the extraction and purification chamber are formed on the connecting pipe 704.

[0028] In this embodiment, when using the discharging mechanism 7, the booster pump 701 is started through the controller, and the control valve on the horizontal pipe 702 is opened. The pressurized gas enters the vertical pipe 703 through the horizontal pipe 702, and then enters the extraction tank 1 through the connecting pipe 704, so as to pressurize the wet-process phosphoric acid solution after extraction and purification, and thus improve the filtration efficiency.

[0029] In a further preferred embodiment of the present utility model, an installation pipe 8 is fixedly installed on the vertical pipe 703. Control valves are provided on both the installation pipe 8 and the horizontal pipe 702, and the control valves are used to control the installation pipe 8 and the horizontal pipe 702.

[0030] In this embodiment, the control valve is used to control the installation pipe 8 and the horizontal pipe 702. The installation pipe 8 is convenient for connecting with the corresponding water source pump pipeline, so as to facilitate the subsequent cleaning operation of the extraction tank 1.

[0031] In a further preferred embodiment of the present utility model, a mixing mechanism is provided in the extraction tank 1. The mixing mechanism is used to mix the wet-process phosphoric acid solution and the corresponding extraction solvent in the extraction tank 1. The mixing mechanism includes: a stirring frame 9 rotatably installed in the extraction and purification cavity; a driving motor 10 fixedly installed on the outer wall of one side of the extraction tank 1; a connecting shaft 11 rotatably installed on the extraction tank 1, and one end of the connecting shaft 11 is fixedly connected to the output shaft of the driving motor 10; two bevel gears 12 respectively fixedly sleeved on the connecting shaft 11 and the stirring frame 9, and the two bevel gears 12 are meshed with each other.

[0032] In this embodiment, when using the mixing mechanism, the driving motor 10 is started through the controller to drive the connecting shaft 11 to rotate. Under the action of the bevel gears 12, the stirring frame 9 is driven to rotate, so as to fully mix and contact the wet-process phosphoric acid solution and the corresponding extraction solvent, and improve the effect of extracting and purifying the wet-process phosphoric acid solution.

[0033] In a further preferred embodiment of the present utility model, a material turning frame 13 is fixedly installed at the bottom of the stirring frame 9. The material turning frame 13 is used to turn the raw materials at the bottom of the extraction and purification cavity 2. An installation cavity 14 is opened on the inner wall of the extraction tank 1, and a heat dissipation pipe 15 is arranged in the installation cavity 14.

[0034] In this embodiment, when the stirring frame 9 rotates, it will drive the material turning frame 13 to rotate to turn the raw materials at the bottom of the extraction and purification cavity 2, improving the mixing effect of the wet-process phosphoric acid solution and the corresponding extraction solvent. When it is necessary to cool the extraction tank 1, continuously circulate cooling water in the heat dissipation pipe 15 (a temperature sensor is provided on the extraction tank 1, and the temperature sensor is used to monitor the temperature in the extraction tank 1).

[0035] In a further preferred embodiment of the present utility model, a discharge pipe is provided at the bottom of the extraction tank 1. The discharge pipe is communicated with the filtration chamber 4. Operation valves are provided on both the discharge pipe and the material guiding hopper 3. The operation valves are used to control the discharge pipe and the material guiding hopper 3. A feeding pipe is provided on one side of the extraction tank 1.

[0036] In this embodiment, the discharge pipe is used to discharge the filtered wet-process phosphoric acid solution and the filtered impurities. The operation valve is used to control the discharge pipe and the material guiding hopper 3. The feeding pipe facilitates feeding into the extraction tank 1.

[0037] In summary, compared with the related art, the device for purifying wet-process phosphoric acid by the extraction method formed by the extraction tank 1, the heating plate 101, the sealing cover 102, the extraction and purification chamber 2, the material guiding hopper 3, the filtration chamber 4, the filter plate 5, the flipping mechanism 6, the discharging mechanism 7, the installation pipe 8, the mixing mechanism, the material turning frame 13, the installation cavity 14 and the heat dissipation pipe 15 can perform extraction and purification operations on wet-process phosphoric acid, and can quickly filter the impurities in the wet-process phosphoric acid solution after extraction and purification, reducing subsequent operation steps and improving the overall processing efficiency.

[0038] In several embodiments provided by the present application, it should be understood that the disclosed device can be implemented in other ways.

[0039] The above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit the protection scope of the utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all embodiments. Based on these embodiments, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model. Although the present utility model has been described in detail with reference to the above embodiments, those of ordinary skill in the art can still, without conflict, make combinations, additions, deletions or other adjustments to the features in the embodiments of the present utility model according to the situation without creative efforts, so as to obtain different technical solutions that essentially do not deviate from the concept of the present utility model, and these technical solutions also belong to the scope of protection of the present utility model.

Claims

1. An apparatus for purifying wet-process phosphoric acid by an extraction method, characterized in that, It includes: an extraction tank for extracting and purifying wet-process phosphoric acid. A heating plate is provided on the upper part of the inner wall of the extraction tank for heating the inside of the extraction tank. A sealing cover is provided on the top of the extraction tank; an extraction and purification chamber opened in the upper part of the extraction tank for performing extraction and purification operations on wet-process phosphoric acid; a filtration chamber opened in the lower part of the extraction tank, a material guiding hopper fixedly installed in the extraction tank, the material guiding hopper connecting the extraction and purification chamber and the filtration chamber for guiding the raw materials in the extraction and purification chamber to the filtration chamber; a filter plate provided in the filtration chamber for filtering the wet-process phosphoric acid after extraction and purification in the extraction and purification chamber; a flipping mechanism provided on the filtration chamber and the filter plate for driving the filter plate to flip; a discharging mechanism assembled on the extraction tank for discharging the raw materials in the extraction tank.

2. The device for purifying wet-process phosphoric acid by extraction method according to claim 1, characterized in that, The flipping mechanism includes: a servo motor fixedly installed on the outer wall of one side of the extraction tank; a mounting shaft rotatably installed on the extraction tank, one end of the mounting shaft being fixedly connected to the output shaft of the servo motor, and the other end of the mounting shaft being fixedly connected to the filter plate.

3. The apparatus for purifying wet-process phosphoric acid by the extraction method according to claim 1, wherein The discharging mechanism includes: a booster pump fixedly installed on the top of the sealing cover, a horizontal pipe fixedly installed on the booster pump; a vertical pipe fixedly installed on the sealing cover, the vertical pipe being communicated with the horizontal pipe; a connecting pipe fixedly installed on the inner wall of the sealing cover, the connecting pipe being communicated with the vertical pipe, and a plurality of through holes facing the extraction and purification chamber being opened on the connecting pipe.

4. The apparatus for purifying wet-process phosphoric acid by extraction method according to claim 3, wherein A mounting pipe is fixedly installed on the vertical pipe, and control valves are provided on both the mounting pipe and the horizontal pipe for controlling the mounting pipe and the horizontal pipe.

5. The device for purifying wet-process phosphoric acid by extraction method as claimed in claim 1, wherein, A mixing mechanism is provided in the extraction tank for mixing the wet-process phosphoric acid solution and the corresponding extraction solvent in the extraction tank. The mixing mechanism includes: a stirring frame rotatably installed in the extraction and purification chamber; a driving motor fixedly installed on the outer wall of one side of the extraction tank; a connecting shaft rotatably installed on the extraction tank, one end of the connecting shaft being fixedly connected to the output shaft of the driving motor; two bevel gears respectively fixedly sleeved on the connecting shaft and the stirring frame, the two bevel gears meshing with each other.

6. The device for purifying wet-process phosphoric acid by extraction method as described in claim 1, wherein, A material turning frame is fixedly installed at the bottom of the stirring frame for turning the raw materials at the bottom of the extraction and purification chamber. An installation cavity is opened on the inner wall of the extraction tank, and a heat dissipation pipe is provided in the installation cavity.

7. The device for purifying wet-process phosphoric acid by extraction method according to claim 1, characterized in that, A discharge pipe is provided at the bottom of the extraction tank, the discharge pipe being communicated with the filtration chamber. Operation valves are provided on both the discharge pipe and the material guiding hopper for controlling the discharge pipe and the material guiding hopper. A feeding pipe is provided on one side of the extraction tank.

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