Concentrating tower for wet-process phosphoric acid purification method

Abstract

The utility model is applicable to the technical field of concentration towers, and provides a concentration tower for a wet-process phosphoric acid purification method. The supporting columns are fixedly mounted on the bottom plate; the lower tower body is fixedly mounted at the top ends of the supporting columns; the upper tower body is arranged at the top of the lower tower body; the exhaust port is formed in the top of the upper tower body; the atomizing and spraying mechanism is mounted on the inner wall of the top of the upper tower body and is used for atomizing and spraying phosphoric acid liquid; the steam injection mechanism is mounted on the upper tower body and is used for injecting saturated steam into the upper tower body. According to the concentration tower for the wet-process phosphoric acid purification method provided by the scheme, efficient purification and concentration of phosphoric acid liquid are realized by integrating various mechanisms such as atomization spraying, steam spraying, filtering and lifting, and the upper tower body and the lower tower body can be conveniently combined and separated; furthermore, the filter element can be conveniently detached, and impurities filtered and collected in the filter element can be cleaned.

Description

Technical Field

[0001] The utility model belongs to the technical field of concentration towers, in particular to a concentration tower used in a wet phosphoric acid purification method. Background Art

[0002] The main impurities that need to be removed from wet-process phosphoric acid are fluorine, sulfate, iron, aluminum, magnesium, silicon, calcium, etc. Some wet-process phosphoric acid also contains trace amounts of harmful heavy metals such as arsenic, lead, cadmium, etc. For these impurities, the wet-process phosphoric acid should be purified accordingly according to the different requirements of feed or food-grade phosphate. After the wet-process phosphoric acid is heated to a certain degree, most of the fluorine escapes in the form of gaseous fluoride (SiF4, HF). If active silicon is added and saturated steam is introduced, the amount of fluorine escape will increase. Impurities are mostly precipitated in the form of pyrophosphate or metaphosphate.

[0003] However, the existing concentration tower used for the wet phosphoric acid purification method is not convenient for disassembling the filter element, so it is not convenient to clean the impurities filtered out of the filter element, which is relatively inconvenient. Utility Model Content

[0004] The utility model provides a concentration tower for wet phosphoric acid purification, aiming to solve the problem that the existing concentration tower for wet phosphoric acid purification is not convenient for disassembling the filter element and cleaning the impurities filtered out of the filter element.

[0005] To solve the above problems, the utility model is implemented as follows: a concentration tower for wet phosphoric acid purification method, comprising: a bottom plate; a plurality of pillars fixedly mounted on the bottom plate; a lower tower body fixedly mounted on the top ends of the plurality of pillars; an upper tower body arranged on the top of the lower tower body; an exhaust port arranged on the top of the upper tower body; an atomizing injection mechanism installed on the inner wall of the top of the upper tower body, the atomizing injection mechanism being used to atomize and inject phosphoric acid liquid; a steam injection mechanism installed on the upper tower body, the steam injection mechanism being used to spray saturated steam into the interior of the upper tower body; a filtering mechanism arranged on the inner wall of the lower tower body, the filtering mechanism being used to filter impurities; and a lifting mechanism installed on the bottom plate, the lifting mechanism being used to control the lifting of the upper tower body.

[0006] Preferably, the atomizing spray mechanism comprises: an annular tube fixedly mounted on the inner wall of the top of the upper tower body and provided with a plurality of atomizing nozzles; and a liquid inlet pipe arranged on the annular tube and extending to the outside of the upper tower body.

[0007] Preferably, the steam injection mechanism comprises: a spiral tube fixedly mounted on the inner wall of the upper tower body and having a plurality of steam nozzles; a steam generator fixedly mounted on the bottom plate; and a steam hose disposed on the steam generator and connected to the spiral tube.

[0008] Preferably, the filtering mechanism comprises: an annular frame fixedly mounted on the inner wall of the lower tower body; a filter element disposed in the annular frame; and a plurality of pull rings fixedly mounted on the filter element.

[0009] Preferably, the lifting mechanism includes: a fixed sleeve plate fixedly mounted on the lower tower body; a sliding sleeve plate fixedly mounted on the upper tower body; a plurality of screw rods rotatably mounted on the bottom plate and rotatably connected to the fixed sleeve plate, and the plurality of screw rods are all threadedly connected to the sliding sleeve plate.

[0010] Preferably, a servo motor is fixedly mounted on the base plate, a plurality of active synchronous wheels are fixedly sleeved on the output shaft of the servo motor, a plurality of screw rods are fixedly sleeved with driven synchronous wheels, a plurality of active synchronous wheels and a plurality of driven synchronous wheels are sleeved with a plurality of synchronous belts, and a limiting block is fixedly mounted on the top of the plurality of screw rods.

[0011] Preferably, a liquid extraction pipe is provided at the bottom of the lower tower body, and a liquid extraction valve is provided on the liquid extraction pipe.

[0012] Compared with the related art, the concentration tower for wet phosphoric acid purification provided by the utility model has the following beneficial effects:

[0013] Compared with the prior art, the present invention provides a concentration tower for wet phosphoric acid purification, in which the bottom plate serves as the basic support of the entire concentration tower, ensuring the stability of the tower structure and providing a solid foundation for the installation of other components. The pillars are fixedly installed on the bottom plate and support the lower tower body, effectively dispersing and bearing the weight of the tower body, ensuring the stability and safety of the structure. The lower tower body is one of the main parts of the concentration tower, and its internal space is used to accommodate phosphoric acid liquid and perform preliminary filtration treatment, providing a necessary place for the subsequent purification process. The upper tower body is arranged on the top of the lower tower body, and together with the lower tower body, it constitutes a complete concentration tower structure. The upper tower body realizes efficient atomization of phosphoric acid liquid and sufficient contact with steam through the synergistic effect of the atomizing injection mechanism and the steam injection mechanism, thereby promoting the purification and concentration process of the phosphoric acid liquid. The exhaust port is arranged on the top of the upper tower body for discharge. The waste gas generated during the treatment process is kept clean and the operation is safe. The atomizing spray mechanism is installed on the inner wall of the upper tower body. The phosphoric acid liquid is refined into tiny droplets through the atomizing spray technology, which increases the contact area between the phosphoric acid liquid and the steam and improves the purification efficiency. The steam spray mechanism is installed on the upper tower body to spray saturated steam into the upper tower body and fully mix it with the atomized phosphoric acid liquid. The heat and power of the steam are used to promote the evaporation of the phosphoric acid liquid and the removal of impurities, so as to achieve the dual effects of purification and concentration. The filtering mechanism is set on the inner wall of the lower tower body to perform preliminary filtration on the phosphoric acid liquid entering the lower tower body and remove the large particles of impurities therein, laying the foundation for the subsequent purification process. The lifting mechanism is installed on the bottom plate. By controlling the lifting of the upper tower body, the filter element can be easily removed, so that it is convenient for the staff to clean up the impurities collected by the filter element.

[0014] In summary, the wet phosphoric acid purification and concentration tower described in the present invention realizes efficient purification and concentration of phosphoric acid liquid by integrating multiple mechanisms such as atomization injection, steam injection, filtration and lifting, and has significant advantages such as compact structure, simple operation and good purification effect, which is of great significance for improving the quality and production efficiency of phosphoric acid products. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the main structure of a concentration tower used in a wet phosphoric acid purification method provided by the utility model;

[0016] Figure 2 for Figure 1 Schematic diagram of the three-dimensional structure of the middle and upper tower;

[0017] Figure 3 for Figure 1 Schematic diagram of the enlarged structure of part A shown in FIG.

[0018] Figure numerals: 1, bottom plate; 2, support; 3, lower tower body; 4, upper tower body; 5, exhaust port; 6, annular pipe; 7, atomizing nozzle; 8, liquid inlet pipe; 9, spiral pipe; 10, steam nozzle; 11, steam generator; 12, steam hose; 13, annular frame; 14, filter element; 15, pull ring; 16, fixed sleeve; 17, sliding sleeve; 18, screw; 19, servo motor; 20, active synchronous wheel; 21, driven synchronous wheel; 22, limit block; 23, liquid extraction pipe; 24, liquid extraction valve. DETAILED DESCRIPTION

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field of the present application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "including" and "having" in the specification and claims of the present application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the present application or the above-mentioned figures are used to distinguish different objects, rather than to describe a specific order; the terms "inside", "outside", "left", and "right" indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which 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 direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0020] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0021] The utility model embodiment provides a concentration tower for wet phosphoric acid purification method, such as Figure 1-3As shown, the concentration tower used for the wet phosphoric acid purification method includes: a bottom plate 1; a plurality of pillars 2 fixedly mounted on the bottom plate 1; a lower tower body 3 fixedly mounted on the top of the plurality of pillars 2; an upper tower body 4 arranged on the top of the lower tower body 3; an exhaust port 5 arranged on the top of the upper tower body 4; an atomizing injection mechanism installed on the inner wall of the top of the upper tower body 4, the atomizing injection mechanism is used to atomize and inject phosphoric acid liquid; a steam injection mechanism installed on the upper tower body 4, the steam injection mechanism is used to spray saturated steam into the interior of the upper tower body 4; a filtering mechanism arranged on the inner wall of the lower tower body 3, the filtering mechanism is used to filter impurities; a lifting mechanism installed on the bottom plate 1, the lifting mechanism is used to control the lifting of the upper tower body 4.

[0022] In this embodiment, the bottom plate 1 serves as the basic support of the entire concentration tower, ensuring the stability of the tower structure and providing a solid foundation for the installation of other components. The pillar 2 is fixedly installed on the bottom plate 1 and supports the lower tower body 3, effectively dispersing and bearing the weight of the tower body, ensuring the stability and safety of the structure. The lower tower body 3 is one of the main parts of the concentration tower, and its internal space is used to accommodate phosphoric acid liquid and perform preliminary filtration treatment, providing a necessary place for the subsequent purification process. The upper tower body 4 is arranged on the top of the lower tower body 3, and together with the lower tower body, it constitutes a complete concentration tower structure. The upper tower body achieves efficient atomization of the phosphoric acid liquid and sufficient contact with the steam through the synergistic effect of the atomizing injection mechanism and the steam injection mechanism, thereby promoting the purification and concentration process of the phosphoric acid liquid. The exhaust port 5 is arranged on the top of the upper tower body 4 to discharge the waste gas generated during the treatment process. , keep the environment in the tower clean and the operation safe, the atomizing spray mechanism is installed on the top inner wall of the upper tower body 4, and the phosphoric acid liquid is refined into tiny droplets through the atomizing spray technology, which increases the contact area between the phosphoric acid liquid and the steam and improves the purification efficiency. The steam spray mechanism is installed on the upper tower body 4, which is used to spray saturated steam into the upper tower body, fully mix it with the atomized phosphoric acid liquid, and use the heat and power of the steam to promote the evaporation of the phosphoric acid liquid and the removal of impurities, so as to achieve the dual effects of purification and concentration. The filtering mechanism is arranged on the inner wall of the lower tower body 3, which is used to perform preliminary filtration on the phosphoric acid liquid entering the lower tower body, remove the large particles of impurities therein, and lay the foundation for the subsequent purification process. The lifting mechanism is installed on the bottom plate 1, and the filter element 14 can be easily removed by controlling the lifting of the upper tower body 4, so that it is convenient for the staff to clean the impurities filtered and collected in the filter element 14;

[0023] In summary, the wet phosphoric acid purification and concentration tower described in the present invention realizes efficient purification and concentration of phosphoric acid liquid by integrating multiple mechanisms such as atomization injection, steam injection, filtration and lifting, and has significant advantages such as compact structure, simple operation and good purification effect, which is of great significance for improving the quality and production efficiency of phosphoric acid products.

[0024] In a further preferred embodiment of the utility model, the atomizing injection mechanism includes: an annular tube 6 fixedly mounted on the inner wall of the top of the upper tower body 4 and having a plurality of atomizing nozzles 7; and a liquid inlet pipe 8 arranged on the annular tube 6 and extending to the outside of the upper tower body 4.

[0025] In this embodiment, the phosphoric acid liquid is introduced into the annular tube 6 through the liquid inlet pipe 8 , and the phosphoric acid liquid is atomized and sprayed into the interior of the upper tower body 4 through a plurality of atomizing nozzles 7 .

[0026] In a further preferred embodiment of the utility model, the steam injection mechanism includes: a spiral tube 9 fixedly mounted on the inner wall of the upper tower body 4 and having a plurality of steam nozzles 10; a steam generator 11 fixedly mounted on the base plate 1; and a steam hose 12 arranged on the steam generator 11 and connected to the spiral tube 9.

[0027] In this embodiment, saturated steam is injected into the spiral tube 9 through the steam generator 11 and the steam hose 12 , and the saturated steam is uniformly sprayed into the interior of the upper tower body 4 through the plurality of steam nozzles 10 .

[0028] In a further preferred embodiment of the utility model, the filtering mechanism includes: an annular frame 13 fixedly mounted on the inner wall of the lower tower body 3 ; a filter element 14 disposed in the annular frame 13 ; and a plurality of pull rings 15 fixedly mounted on the filter element 14 .

[0029] In this embodiment, the filter element 14 can be supported by the annular frame 13, and the filter element 14 can filter impurities generated during the phosphoric acid purification process.

[0030] In a further preferred embodiment of the utility model, the lifting mechanism includes: a fixed sleeve 16 fixedly mounted on the lower tower body 3; a sliding sleeve 17 fixedly mounted on the upper tower body 4; and a plurality of screws 18 rotatably mounted on the base plate 1 and rotatably connected to the fixed sleeve 16, wherein the plurality of screws 18 are all threadedly connected to the sliding sleeve 17.

[0031] In this embodiment, the upper tower body 4 can be driven to move upward by the multiple screws 18 rotating on the sliding sleeve 17, so that the upper tower body 4 is separated from the lower tower body 3, thereby facilitating the staff to disassemble the filter element 14 and clean the impurities therein.

[0032] In a further preferred embodiment of the utility model, a servo motor 19 is fixedly mounted on the base plate 1, a plurality of active synchronous wheels 20 are fixedly sleeved on the output shaft of the servo motor 19, a plurality of screw rods 18 are fixedly sleeved with driven synchronous wheels 21, a plurality of synchronous belts are sleeved on the plurality of active synchronous wheels 20 and the plurality of driven synchronous wheels 21, and a limiting block 22 is fixedly mounted on the top of the plurality of screw rods 18.

[0033] In this embodiment, the plurality of screw rods 18 can be driven to rotate synchronously by means of the servo motor 19 , a plurality of driving synchronous wheels 20 , a plurality of driven synchronous wheels 21 and a plurality of synchronous belts.

[0034] In a further preferred embodiment of the present invention, a liquid taking pipe 23 is provided at the bottom of the lower tower body 3 , and a liquid taking valve 24 is provided on the liquid taking pipe 23 .

[0035] In this embodiment, pure concentrated phosphoric acid can be taken through the liquid taking pipe 23 and the liquid taking valve 24 .

[0036] In summary, compared with the relevant technology, the present device not only realizes the efficient purification and concentration of phosphoric acid liquid by integrating multiple mechanisms such as atomization injection, steam injection, filtration and lifting, but also facilitates the combination and separation of the upper tower body and the lower tower body, thereby facilitating the disassembly of the filter element and the cleaning of the impurities filtered and collected therein.

[0037] In the several embodiments provided in this application, it should be understood that the disclosed device can be implemented in other ways.

[0038] The above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit the protection scope of the utility model. Obviously, the described embodiments are only some embodiments of the utility model, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model. Although the utility model has been described in detail with reference to the above embodiments, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the utility model according to the circumstances without conflict, without making creative work, so as to obtain different other technical solutions that do not deviate from the concept of the utility model in essence, and these technical solutions also belong to the scope of protection of the utility model.

Claims

1. A concentration tower for wet phosphoric acid purification method, characterized in that: include: Base plate; A plurality of pillars fixedly mounted on the base plate; A lower tower body fixedly mounted on the top of the plurality of pillars; An upper tower body disposed on the top of the lower tower body; An exhaust port is arranged at the top of the upper tower body; an atomizing spray mechanism installed on the inner wall of the top of the upper tower body, the atomizing spray mechanism is used to spray the phosphoric acid liquid; a steam spray mechanism installed on the upper tower body, the steam spray mechanism is used to spray saturated steam into the interior of the upper tower body; a filtering mechanism is arranged on the inner wall of the lower tower body, the filtering mechanism is used to filter impurities; a lifting mechanism installed on the bottom plate, the lifting mechanism is used to control the lifting of the upper tower body.

2. The concentrating tower for wet phosphoric acid purification method according to claim 1, characterized in that: The atomizing spray mechanism comprises: an annular tube fixedly mounted on the inner wall of the top of the upper tower body and provided with a plurality of atomizing nozzles; and a liquid inlet pipe arranged on the annular tube and extending to the outside of the upper tower body.

3. The concentrating tower for wet phosphoric acid purification method according to claim 1, characterized in that: The steam injection mechanism comprises: a spiral tube fixedly mounted on the inner wall of the upper tower body and having a plurality of steam nozzles; a steam generator fixedly mounted on the bottom plate; and a steam hose arranged on the steam generator and connected to the spiral tube.

4. The concentrating tower for wet phosphoric acid purification method according to claim 1, characterized in that: The filtering mechanism comprises: an annular frame fixedly mounted on the inner wall of the lower tower body; a filter element arranged in the annular frame; and a plurality of pull rings fixedly mounted on the filter element.

5. The concentrating tower for wet phosphoric acid purification method according to claim 4, characterized in that: The lifting mechanism comprises: a fixed sleeve plate fixedly sleeved on the lower tower body; a sliding sleeve plate fixedly sleeved on the upper tower body; a plurality of screw rods rotatably mounted on the bottom plate and rotatably connected to the fixed sleeve plate, wherein the plurality of screw rods are all threadedly connected to the sliding sleeve plate.

6. The concentrating tower for wet phosphoric acid purification method according to claim 5, characterized in that: A servo motor is fixedly mounted on the base plate, a plurality of active synchronous wheels are fixedly sleeved on the output shaft of the servo motor, a plurality of driven synchronous wheels are fixedly sleeved on the plurality of screw rods, a plurality of synchronous belts are sleeved on the plurality of active synchronous wheels and the plurality of driven synchronous wheels, and a limiting block is fixedly mounted on the top end of the plurality of screw rods.

7. The concentrating tower for wet phosphoric acid purification method according to claim 1, characterized in that: A liquid taking pipe is arranged at the bottom of the lower tower body, and a liquid taking valve is arranged on the liquid taking pipe.

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