Phosphoric acid purification device with filter screen scraper

Abstract

The utility model belongs to the technical field of phosphoric acid preparation, and particularly relates to a phosphoric acid purification device with a filter screen scraper. Comprising a body; the main body comprises a shell and a stirring device; the shell is provided with an inner cavity, and a feeding port and a discharging port are formed in the shell. A filter screen is arranged in the inner cavity; the inner cavity is divided into a reaction area and a filtering area by the filter screen; the feeding hole corresponds to the reaction area; the stirring device comprises a stirring motor, a stirring shaft and a stirring paddle assembly; the stirring paddle assembly is arranged in the reaction area; during use, phosphoric acid mixed raw materials enter the reaction area from the feed port, filtrate penetrates through the filter holes and enters the filter-out area, and filter residues are blocked by the filter screen and accumulated on the surface of the filter screen; the stirring motor drives the stirring shaft to rotate, the stirring shaft rotates to drive the stirring paddle assembly to rotate together, and the stirring paddle assembly scrapes the surface of the filter screen in the rotating process, so that the surface of the filter screen is cleaned in time, accumulation of filter residues is reduced, the filtering efficiency is kept, and a good filtering effect is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of phosphoric acid preparation, and in particular relates to a phosphoric acid purification device with a filter scraper. Background Art

[0002] Phosphoric acid is an important chemical raw material, widely used in fertilizers, food, detergents, metallurgy and other fields. However, phosphoric acid often contains a variety of impurities, such as metal ions, silicates, fluorides, etc. These impurities will affect the quality and performance of phosphoric acid, so it needs to be purified. Existing phosphoric acid purification methods include precipitation, adsorption, ion exchange, extraction, etc. Among them, the precipitation method uses precipitants such as barium chloride, calcium chloride, and calcium hydroxide to separate impurities and phosphoric acid into solid-liquid phases, and then removes impurities by filtering.

[0003] Among other purification methods, filtering operations are also common. For example, Chinese invention patent application CN116354321A discloses an industrial device for crystallization purification of electronic-grade phosphoric acid, including a crystallization tank, a suction filtration tank, a buffer tank, a finished product tank, a dilute acid tank, and a raw material tank; a sieve plate is provided in the crystallization tank, the sieve plate has openings and is inlaid with a filter cloth, and the filter cloth is used to filter the phosphoric acid solution in the crystallization tank. However, the invention patent application and the filtering structure in the existing phosphoric acid purification device are prone to reduce the filtering efficiency due to the accumulation of filter residues during the filtering process, and the filtering effect is not good. Utility Model Content

[0004] The utility model aims to provide a phosphoric acid purification device with a filter scraper, aiming to solve the technical problem that the filter structure in the prior art is prone to accumulation of filter residues during use, resulting in reduced filtering efficiency and poor filtering effect.

[0005] To achieve the above-mentioned purpose, an embodiment of the utility model provides a phosphoric acid purification device with a filter scraper, comprising a main body; the main body comprises a shell and a stirring device; the shell is provided with an inner cavity, and a feed port and a discharge port are provided on the shell; the inner cavity is provided with a filter; the filter divides the inner cavity into a reaction zone and a filtration zone; the feed port corresponds to the reaction zone; the stirring device comprises a stirring motor, a stirring shaft, and a stirring paddle assembly; the stirring paddle assembly is arranged in the reaction zone; the stirring motor is used to drive the stirring shaft to rotate, and the rotation of the stirring shaft can drive the stirring paddle assembly to scrape the surface of the filter to scrape off impurities accumulated on the surface of the filter.

[0006] Optionally, the stirring paddle assembly includes a first connecting rod and a first scraper; one end of the first connecting rod is connected to the stirring shaft, and the other end of the first connecting rod is connected to the first scraper; the first scraper is used to scrape the surface of the filter screen.

[0007] Optionally, the first scraper is provided with a plurality of perforations, and the perforations are used to allow liquid to pass through.

[0008] Optionally, a brush layer is provided on the side of the first scraper, and the brush layer contacts the surface of the filter screen.

[0009] Optionally, the stirring paddle assembly includes a second connecting rod and a second scraper; the left and right ends of the second connecting rod are respectively connected to the stirring shaft and the second scraper; and the bottom edge of the second scraper contacts the bottom surface of the reaction zone.

[0010] Optionally, end plates are provided at both left and right ends of the second scraper, and a flow-pushing groove is provided between the two end plates; the length of the flow-pushing groove gradually increases from the side close to the second scraper to the side away from the second scraper.

[0011] Optionally, the discharge port includes a filter residue outlet; the filter residue outlet is arranged at the bottom of the reaction zone; and the size of the filter residue outlet is greater than or equal to the size of the push flow trough.

[0012] Optionally, the filter screen is arranged longitudinally; the top and the bottom of the filter screen are fixedly connected to the inner wall of the inner cavity through fixing parts; and reinforcing ribs are provided on the filter screen.

[0013] Optionally, a maintenance port is provided on the top of the shell; a top cover is provided on the maintenance port of the shell; a connecting hole is provided from the top surface of the top cover to its bottom surface; the top end of the stirring shaft passes through the connecting hole to be transmission-connected to the output end of the stirring motor; a support frame is provided on the top of the top cover, and the stirring motor is arranged on the support frame.

[0014] Optionally, a soft rubber pad is provided at the bottom of the support frame, and the bottom of the soft rubber pad is connected to the top of the top cover.

[0015] Compared with the prior art, the above one or more technical solutions in the phosphoric acid purification device with filter scraper provided by the embodiment of the utility model have at least one of the following technical effects:

[0016] The filter screen divides the inner cavity into a reaction zone and a filtration zone; when in use, the phosphoric acid mixed raw material enters the reaction zone from the feed inlet, wherein the filtrate passes through the filter hole and enters the filtration zone to be discharged, and the filter residue is blocked by the filter screen and accumulates on the surface of the filter screen; the stirring motor drives the stirring shaft to rotate, and the rotation of the stirring shaft drives the stirring paddle assembly to rotate together; the stirring paddle assembly scrapes the surface of the filter screen during the rotation process, so that the surface is cleaned in time to reduce the accumulation of filter residue, so as to maintain the filtration efficiency and have a better filtration effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 It is a cross-sectional view of the utility model.

[0019] Figure 2 for Figure 1 Enlarged schematic diagram of circle A in the middle.

[0020] Figure 3 for Figure 1 Enlarged schematic diagram of circle B in the middle.

[0021] Figure 4 It is a schematic diagram of the structure of the stirring paddle assembly.

[0022] Figure 5 It is a schematic diagram of the structure of the second scraper.

[0023] Figure 6 Schematic diagram of the structure of the filter.

[0024] Among them, the reference numerals in the figure are:

[0025] 1. Shell; 2. Stirring device;

[0026] 11. Inner cavity; 111. Reaction zone; 112. Filtration zone; 12. Feed inlet; 13. Discharge outlet; 131. Filter residue outlet; 132. Filtrate outlet; 14. Maintenance port; 15. Top cover; 151. Connection hole; 16. Support frame; 161. Soft rubber pad; 17. Filter screen; 171. Fixing piece; 172. Reinforcement rib;

[0027] 21. stirring motor; 22. stirring shaft; 23. stirring paddle assembly; 231. first connecting rod; 232. first scraper; 2321. perforation; 2322. brush layer; 233. second connecting rod; 234. second scraper; 2341. end plate; 2342. push flow trough. DETAILED DESCRIPTION

[0028] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0029] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention 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 cannot be understood as a limitation on the present invention.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0031] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0032] In one embodiment of the present invention, a phosphoric acid purification device with a filter scraper is provided for purifying a phosphoric acid mixed solution, referring to Figure 1 and Figure 2 , including a main body; the main body includes a shell 1 for supporting and protecting and a stirring device 2 for stirring the phosphoric acid mixed solution; the shell 1 is provided with an inner cavity 11, and a feed port 12 and a discharge port 13 are provided on the shell 1. The feed port 12 and the discharge port 13 are used to connect the inner cavity 11 with the outside to facilitate the feeding of the phosphoric acid mixed solution, the discharge of the filter residue, and the discharge of the filtrate.

[0033] Furthermore, the inner cavity 11 is provided with a filter screen 17 for solid-liquid separation, and the filter screen 17 divides the inner cavity 11 into a reaction zone 111 and a filtration zone 112; the phosphoric acid mixed solution generates solid matter in the reaction zone 111, and the filtrate passes through the filter screen 17 from the reaction zone 111 to enter the filtration zone 112; the feed port 12 corresponds to the reaction zone 111, so that the phosphoric acid mixed solution passes through the feed port 12 and directly enters the reaction zone 111 for reaction.

[0034] Furthermore, the stirring device 2 includes a stirring motor 21, a stirring shaft 22, and a stirring paddle assembly 23; the stirring paddle assembly 23 is arranged in the reaction zone 111; the stirring motor 21 is used to drive the stirring shaft 22 to rotate, and the rotation of the stirring shaft 22 can drive the stirring paddle assembly 23 to sweep the surface of the filter screen 17 to scrape off the impurities accumulated on the surface of the filter screen 17. In addition, the rotation of the stirring paddle assembly 23 can stir the solution to promote the reaction of the solution.

[0035] Compared with the prior art, the above one or more technical solutions in the phosphoric acid purification device with filter scraper provided by the embodiment of the utility model have at least one of the following technical effects:

[0036] When in use, the phosphoric acid mixed raw material enters the reaction zone 111 from the feed inlet 12, wherein the filtrate passes through the filter hole and enters the filtration zone 112 to be discharged, and the filter residue is blocked by the filter screen 17 and accumulates on the surface of the filter screen 17; the stirring motor 21 drives the stirring shaft 22 to rotate, and the rotation of the stirring shaft 22 drives the stirring paddle assembly 23 to rotate together; the stirring paddle assembly 23 scrapes the surface of the filter screen 17 during the rotation process, so that the surface is cleaned in time to reduce the accumulation of filter residue, so as to maintain the filtration efficiency and have a better filtration effect.

[0037] In another embodiment of the present invention, reference Figure 4 and Figure 5 The stirring paddle assembly 23 includes a first connecting rod 231 and a first scraper 232; one end of the first connecting rod 231 is connected to the stirring shaft 22, and the other end of the first connecting rod 231 is connected to the first scraper 232. The connection method between the two can be set to one or more of plug-in, bolt connection, and clip-on, and can also be connected with the help of a connecting piece; the first scraper 232 is used to scrape the surface of the filter screen 17.

[0038] Furthermore, a plurality of through holes 2321 are provided on the first scraper 232 , and the through holes 2321 are used to allow liquid to pass through so as to reduce the resistance encountered by the first scraper 232 during the rotation process.

[0039] Furthermore, a brush layer 2322 is provided on the side of the first scraper 232, and the brush layer 2322 is in contact with the surface of the filter screen 17; the brush layer 2322 is made of a soft bristle material, such as nylon, to reduce damage to the filter screen 17 during the scraping process; of course, in other embodiments, the side of the first scraper 232 can be set to a straight plate structure to simplify the structure and facilitate production; it should be noted that the filter residue is a solid structure, and its size is larger than the filter hole size of the filter screen 17, so that the filter residue will not enter the filter hole to form accumulation, and the first scraper 232 can sweep the filter residue away from the surface of the filter screen 17, and the accumulation of some small-sized filter residue on the filter screen can be ignored.

[0040] In another embodiment of the present invention, reference Figure 4 and Figure 5 The stirring paddle assembly 23 includes a second connecting rod 233 and a second scraper 234; the left and right ends of the second connecting rod 233 are respectively connected to the stirring shaft 22 and the second scraper 234, and the connection method between the two can be set to one or more of plug-in, bolt connection, and clip connection, or can be connected with the help of a connecting piece; the bottom edge of the second scraper 234 contacts the bottom surface of the reaction zone 111, and the second scraper 234 is used to sweep the filter residue accumulated on the bottom surface of the reaction zone 111 to facilitate the cleaning of the filter residue.

[0041] Furthermore, end plates 2341 are provided at both left and right ends of the second scraper 234, and a push flow groove 2342 is provided between the two end plates 2341; the size of the push flow groove 2342 gradually increases from the side close to the second scraper 234 to the side away from the second scraper 234. When the second scraper 234 is used to scrape the filter residue, the filter residue is gathered in the push flow groove 2342 under the guidance of the end plate 2341, so that the filter residue is concentrated and easy to handle.

[0042] Specifically, refer to Figure 1 and Figure 3 The discharge port 13 and the feed port 12 are both provided with valves (not shown in the figure), which are used to control the entry, discharge, and flow rate of materials; the discharge port 13 includes a residue outlet 131 and a residue outlet 131; the residue outlet 131 is provided at the bottom of the reaction zone 111, and the second scraper 234 can sweep the residue to the residue outlet 131, so that the residue is discharged from the reaction zone 111; the size of the residue outlet 131 is greater than or equal to the size of the push flow groove 2342; the filtrate outlet 132 is provided on the side wall of the filtration zone 112 to facilitate the discharge of the filtrate.

[0043] In another embodiment of the present invention, reference Figure 1 , Figure 3 , Figure 6 The filter screen 17 is arranged longitudinally; the top and bottom of the filter screen 17 are fixedly connected to the inner wall of the inner cavity 11 by a fixing member 171; the filter screen 17 is provided with a reinforcing rib 172, and the reinforcing rib 172 is used to improve the structural stability of the filter screen 17.

[0044] In another embodiment of the present invention, reference Figure 1 and Figure 2 A maintenance port 14 is provided on the top of the shell 1; a top cover 15 is provided on the maintenance port 14 of the shell 1, and the top cover 15 can cover the maintenance port 14 to prevent dust and water; a connecting hole 151 is penetrated from the top surface to the bottom surface of the top cover 15; the top end of the stirring shaft 22 passes through the connecting hole 151 to be transmission-connected with the output end of the stirring motor 21; a waterproof ring is provided on the inner side wall of the connecting hole 151, and the inner side wall of the waterproof ring abuts against the outer side wall of the stirring shaft 22; a supporting frame 16 is provided on the top of the top cover 15, and the stirring motor 21 is arranged on the supporting frame 16.

[0045] Furthermore, a soft rubber pad 161 is provided at the bottom of the support frame 16, and the bottom of the soft rubber pad 161 is connected to the top of the top cover 15. The soft rubber pad 161 is used for shock absorption to reduce the vibration generated by the stirring motor 21 when it is started, which is transmitted to the shell 1 through the support frame 16 to reduce the shaking of the shell 1 and improve the stability of use.

[0046] The rest of this embodiment is the same as the first embodiment. The features not explained in this embodiment are all based on the explanations in the first embodiment and will not be described in detail here.

[0047] The above content is a further detailed description of the utility model in combination with specific preferred implementation methods, and it cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, without departing from the concept of the utility model, its architecture can be flexible and can derive a series of products. Just making a few simple deductions or substitutions should be regarded as belonging to the patent protection scope of the utility model determined by the submitted claims.

Claims

1. A phosphoric acid purification device with a filter scraper, comprising a main body; the main body comprises a shell (1) and a stirring device (2); the shell (1) is provided with an inner cavity (11), and the shell (1) is provided with a feed port (12) and a discharge port (13); characterized in that: The inner cavity (11) is provided with a filter screen (17); the filter screen (17) divides the inner cavity (11) into a reaction zone (111) and a filtration zone (112); the feed port (12) corresponds to the reaction zone (111); the stirring device (2) comprises a stirring motor (21), a stirring shaft (22), and a stirring paddle assembly (23); the stirring paddle assembly (23) is arranged in the reaction zone (111); the stirring motor (21) is used to drive the stirring shaft (22) to rotate, and the rotation of the stirring shaft (22) can drive the stirring paddle assembly (23) to sweep the surface of the filter screen (17) to scrape off impurities accumulated on the surface of the filter screen (17).

2. The phosphoric acid purification device with a filter scraper according to claim 1, characterized in that: The stirring paddle assembly (23) comprises a first connecting rod (231) and a first scraper (232); one end of the first connecting rod (231) is connected to the stirring shaft (22), and the other end of the first connecting rod (231) is connected to the first scraper (232); the first scraper (232) is used to scrape the surface of the filter screen (17).

3. The phosphoric acid purification device with a filter scraper according to claim 2, characterized in that: The first scraper (232) is provided with a plurality of perforations (2321), and the perforations (2321) are used to allow liquid to pass through.

4. The phosphoric acid purification device with a filter scraper according to claim 2, characterized in that: A brush layer (2322) is provided on the side of the first scraper (232), and the brush layer (2322) is in contact with the surface of the filter screen (17).

5. The phosphoric acid purification device with a filter scraper according to any one of claims 1 to 4, characterized in that: The stirring paddle assembly (23) comprises a second connecting rod (233) and a second scraper (234); the left and right ends of the second connecting rod (233) are respectively connected to the stirring shaft (22) and the second scraper (234); the bottom edge of the second scraper (234) is in contact with the bottom surface of the reaction zone (111).

6. The phosphoric acid purification device with a filter scraper according to claim 5, characterized in that: The left and right ends of the second scraper (234) are both provided with end plates (2341), and a flow-pushing groove (2342) is provided between the two end plates (2341); the size of the flow-pushing groove (2342) gradually increases from a side close to the second scraper (234) to a side away from the second scraper (234).

7. The phosphoric acid purification device with a filter scraper according to claim 6, characterized in that: The discharge port (13) comprises a filter residue outlet (131); the filter residue outlet (131) is arranged at the bottom of the reaction zone (111); the size of the filter residue outlet (131) is greater than or equal to the size of the push flow groove (2342).

8. The phosphoric acid purification device with a filter scraper according to any one of claims 1 to 4, characterized in that: The filter screen (17) is arranged longitudinally; the top and bottom of the filter screen (17) are fixedly connected to the inner wall of the inner cavity (11) via a fixing member (171); and a reinforcing rib (172) is provided on the filter screen (17).

9. The phosphoric acid purification device with a filter scraper according to any one of claims 1 to 4, characterized in that: The shell (1) is provided with a maintenance opening (14) at the top; the shell (1) is provided with a top cover (15) on the maintenance opening (14); a connecting hole (151) is provided from the top surface to the bottom surface of the top cover (15); the top end of the stirring shaft (22) passes through the connecting hole (151) to be transmission-connected with the output end of the stirring motor (21); a support frame (16) is provided at the top of the top cover (15), and the stirring motor (21) is arranged on the support frame (16).

10. The phosphoric acid purification device with a filter scraper according to claim 9, characterized in that: A soft rubber pad (161) is provided at the bottom of the support frame (16), and the bottom of the soft rubber pad (161) is connected to the top of the top cover (15).

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