Convenient-to-clean extraction device for preparing industrial-grade phosphoric acid

Abstract

The utility model discloses a convenient-to-clean extraction device for industrial grade phosphoric acid preparation, which comprises an extraction tank, a vertically arranged filter plate is arranged in the extraction tank, the extraction tank is divided into a liquid inlet cavity and a liquid outlet cavity by the filter plate, the liquid inlet cavity and the liquid outlet cavity are communicated through the filter plate, and the liquid inlet cavity is communicated with the liquid outlet cavity through the filter plate. A mixed liquid inlet valve is arranged on the side, away from the filter plate, of the liquid inlet cavity, an upper-layer liquid taking valve is arranged on the side, away from the filter plate, of the liquid outlet cavity, a lower-layer liquid discharging valve is arranged at the bottom of the liquid outlet cavity, a cleaning module is arranged on the side, close to the liquid inlet cavity, of the filter plate, and the cleaning module cleans the filter plate. The quality of phosphoric acid is controlled through the filter plate, and meanwhile, the filter plate can be cleaned through the cleaning module, so that the filtering efficiency is ensured, and the quality of phosphoric acid is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial phosphoric acid production equipment, in particular to an easy-to-clean extraction device for preparing industrial-grade phosphoric acid. Background Art

[0002] Currently, domestic wet-process phosphoric acid purification all adopts solvent extraction. Solvent extraction is also called liquid-liquid extraction or extraction. It is based on the fact that phosphoric acid can be extracted by organic solvents, while other impurities are not extracted, thereby separating phosphoric acid from impurities and achieving purification.

[0003] The advantages of this method are high purity of the product, relatively simple production process and equipment, low energy consumption, low raw material consumption, large production capacity, good separation effect, high recovery rate, less environmental pollution, easy automation and continuity of the production process, and conducive to the comprehensive utilization of resources.

[0004] In the existing extraction purification process, an extraction tank is generally used. After the mixed solution is mixed with an organic solvent, it is passed into the extraction tank and allowed to stand for extraction. However, the process has the following problems:

[0005] 1. In actual production, there are scale blocks in the extraction tank. If they are not blocked, the scale blocks may block subsequent valves or pump equipment, causing adverse effects on subsequent production;

[0006] 2. In the prior art, scale blocks are usually blocked by filter screens or filter plates. However, the filter screens and filter plates are difficult to clean and will become clogged after use, affecting the filtration efficiency during the extraction process. Utility Model Content

[0007] The utility model provides an easy-to-clean extraction device for preparing industrial-grade phosphoric acid, aiming to solve the problem that scale in the extraction process easily affects subsequent processes and blocks filtering equipment, affecting the filtration efficiency of the extraction.

[0008] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0009] An easy-to-clean extraction device for preparing industrial-grade phosphoric acid includes an extraction tank, wherein a vertically arranged filter plate is provided in the extraction tank, wherein the filter plate divides the extraction tank into a liquid inlet cavity and a liquid outlet cavity, and the liquid inlet cavity and the liquid outlet cavity are connected through the filter plate, a mixed liquid inlet valve is provided on the side of the liquid inlet cavity away from the filter plate, an upper liquid extraction valve is provided on the side of the liquid outlet cavity away from the filter plate, and a lower liquid discharge valve is provided at the bottom of the liquid outlet cavity, and a cleaning module is provided on the side of the filter plate close to the liquid inlet cavity, and the cleaning module cleans the filter plate.

[0010] Preferably, the cleaning module includes a mounting bracket arranged on the top of the liquid inlet cavity, and a plurality of equally spaced electric telescopic mechanisms are provided at the bottom of the mounting bracket in a direction parallel to the filter plate. The output end of each electric telescopic mechanism is arranged vertically downward, and the output ends of the plurality of electric telescopic mechanisms are fixed on the same brush roller articulated bracket. The brush roller articulated bracket forms a telescopic fit with the mounting bracket through the electric telescopic mechanism. A cleaning roller is rotatably installed in the brush roller articulated bracket, and the cleaning roller forms a linkage fit with the electric telescopic mechanism on the filter plate.

[0011] More preferably, there are at least two electric telescopic mechanisms, and the electric telescopic mechanisms are symmetrical about the middle position of the mounting frame.

[0012] Furthermore, the electric telescopic mechanisms are parallel to each other and output synchronously, the fixed end of the electric telescopic mechanism is detachably fixedly matched with the mounting frame, and the output end of the electric telescopic mechanism is detachably fixedly matched with the brush roller hinge frame.

[0013] Furthermore, the mounting frame is in the shape of a "door", the bottoms of the vertical parts on both sides of the mounting frame are fixedly mounted on both sides of the liquid inlet cavity respectively, and the horizontal part of the mounting frame is parallel to the filter plate.

[0014] Specifically, the cleaning roller is a brush roller, and the bristles of the cleaning roller are movably embedded in the filter holes of the filter plate.

[0015] Preferably, a backwash module is provided on the extraction tank, and the flushing direction of the backwash module is from the liquid outlet cavity to the liquid inlet cavity.

[0016] More preferably, the backwash module includes a backwash solvent inlet valve and a backwash solvent outlet valve, the backwash solvent inlet valve is arranged on the side of the liquid outlet cavity away from the filter plate, and the backwash solvent outlet valve is arranged on the side of the liquid inlet cavity away from the filter plate and a mixed liquid inlet valve is provided.

[0017] Furthermore, the backwash solvent inlet valve is located above the upper liquid extraction valve, and the backwash solvent outlet valve is located below the mixed liquid inlet valve.

[0018] Beneficial effects of the utility model:

[0019] The utility model filters the scale through the filter plate to prevent the scale from clogging the subsequent valves and pumps, and performs preliminary purification of phosphoric acid;

[0020] Secondly, the electric telescopic mechanism of the cleaning module can push the cleaning roller to roll along the filter plate. During the rolling process, the cleaning roller scrubs the filter plate, leaving the scale as much as possible in the liquid inlet cavity, automatically cleaning it, ensuring the filtration efficiency and thus the purification effect of phosphoric acid;

[0021] Finally, a backwash module is provided to clean the extraction tank by backwashing operation, and to flush out the scale remaining on the filter plate together with the cleaned scale, so as to facilitate the cleaning of the extraction tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional schematic diagram of the top of one side of the utility model;

[0023] Figure 2 It is a three-dimensional schematic diagram of the top of the other side of the utility model;

[0024] Figure 3 It is a three-dimensional schematic diagram of the bottom of the utility model;

[0025] Figure 4 This is an enlarged schematic diagram of the cleaning module of the present invention;

[0026] In the figure: 1, extraction tank; 2, filter plate; 3, liquid inlet cavity; 4, liquid outlet cavity; 5, mixed liquid inlet valve; 6, upper layer liquid extraction valve; 7, lower layer liquid discharge valve;

[0027] 8. Cleaning module; 801. Mounting frame; 802. Electric telescopic mechanism; 803. Brush roller articulated frame; 804. Cleaning roller;

[0028] 9. Backwash module; 901. Backwash solvent inlet valve; 902. Backwash solvent outlet valve. DETAILED DESCRIPTION

[0029] As follows, embodiments are further described with reference to the accompanying drawings.

[0030] like Figures 1 to 4 As shown, as a preferred embodiment 1, an extraction device that is easy to clean for preparing industrial-grade phosphoric acid includes an extraction tank 1, wherein a vertically arranged filter plate 2 is provided in the extraction tank 1, and the filter plate 2 divides the extraction tank 1 into a liquid inlet cavity 3 and a liquid outlet cavity 4, and the liquid inlet cavity 3 and the liquid outlet cavity 4 are connected through the filter plate 2, and the liquid inlet cavity 3 is provided with a mixed liquid inlet valve 5 on the side away from the filter plate 2, and the mixed liquid inlet valve 5 is used to be connected to the pre-mixing mechanism to pass the mixed liquid into the extraction tank 1 for static extraction, and the liquid outlet cavity 4 is provided with an upper liquid intake valve 6 on the side away from the filter plate 2, and the upper liquid intake valve 6 is used to discharge the phosphoric acid and organic solvent in the upper layer, and the bottom of the liquid outlet cavity 4 is provided with a lower drain valve 7, and the lower drain valve 7 is used to discharge the aqueous phase and impurities, and the filter plate 2 is provided with a cleaning module 8 on the side close to the liquid inlet cavity 3, and the cleaning module 8 cleans the filter plate 2. The filter plate 2 is used to block the scale in the liquid inlet cavity 3 in the extraction tank 1, thereby minimizing the subsequent scale from entering the subsequent links. At the same time, the filter plate 2 can be automatically cleaned by the cleaning module 8 to ensure the filtering effect of the filter plate 2.

[0031] As a preferred embodiment 2, the cleaning module 8 includes a mounting frame 801 disposed at the top of the liquid inlet chamber 3. The bottom of the mounting frame 801 is provided with a plurality of equally spaced electric telescopic mechanisms 802 in a direction parallel to the filter plate 2. The output end of each electric telescopic mechanism 802 is arranged vertically downward, and the output ends of the plurality of electric telescopic mechanisms 802 are all fixed to the same brush roller articulated frame 803. The brush roller articulated frame 803 forms a telescopic fit with the mounting frame 801 through the electric telescopic mechanism 802. A cleaning roller 804 is rotatably mounted within the brush roller articulated frame 803, and the cleaning roller 804 forms a linkage fit with the electric telescopic mechanism 802 on the filter plate 2. The electric telescopic mechanism 802 provides driving force, causing the brush roller articulated frame 803 to reciprocate in a vertical direction relative to the mounting frame 801. During this movement, the cleaning roller 804, which rotates in the brush roller articulated frame 803, rotates on the filter plate 2, thereby scrubbing the filter plate 2 during the reciprocating movement, preventing the filter plate 2 from being clogged and affecting the extraction and filtration effect.

[0032] Preferably, the electric telescopic mechanism 802 can be an electric cylinder or an electric telescopic rod.

[0033] There are at least two electric telescopic mechanisms 802 , and the electric telescopic mechanisms 802 are symmetrical about the middle position of the mounting frame 801 to ensure the stability of the scrubbing process.

[0034] The electric telescopic mechanisms 802 are parallel to each other and output synchronously. The fixed end of the electric telescopic mechanism 802 is detachably fixed to the mounting frame 801, and the output end of the electric telescopic mechanism 802 is detachably fixed to the brush roller articulated frame 803 to ensure the stability of the brushing process.

[0035] The mounting frame 801 is in the shape of a "door", and the bottoms of the vertical parts on both sides of the mounting frame 801 are fixedly installed on both sides of the liquid inlet cavity 3 respectively, and the horizontal part of the mounting frame 801 is parallel to the filter plate 2 to ensure the stability of the scrubbing process.

[0036] The cleaning roller 804 is a brush roller, and the bristles of the cleaning roller 804 are movably embedded in the filter holes of the filter plate 2 to ensure a brushing effect and prevent the filter holes of the filter plate 2 from being blocked as much as possible.

[0037] As a preferred embodiment 3, a backwash module 9 is provided on the extraction tank 1, and the flushing direction of the backwash module 9 flows from the liquid outlet cavity 4 to the liquid inlet cavity 3, which can backwash the extraction tank 1 to ensure the cleanliness of the extraction tank 1, and at the same time, the filter plate 2 can be backwashed to facilitate cleaning of the filter plate 2.

[0038] The backwash module 9 includes a backwash solvent inlet valve 901 and a backwash solvent outlet valve 902. The backwash solvent inlet valve 901 is located on the side of the liquid outlet chamber 4 away from the filter plate 2, and the backwash solvent outlet valve 902 is located on the side of the liquid inlet chamber 3 away from the filter plate 2. A mixed liquid inlet valve 5 is also provided. The backwash solvent enters through the backwash solvent inlet valve 901 and exits through the backwash solvent outlet valve 902 to ensure the backwash process.

[0039] The backwash solvent inlet valve 901 is located above the upper liquid extraction valve 6, and the backwash solvent outlet valve 902 is located below the mixed liquid inlet valve 5, to ensure the effects of backwashing and extraction, which can be opened separately without affecting each other.

[0040] The working principle of this utility model:

[0041] The utility model filters the scale through the filter plate 2 to prevent the scale from clogging the subsequent valves and pumps, and performs preliminary purification of phosphoric acid;

[0042] Secondly, the electric telescopic mechanism 802 of the cleaning module 8 can push the cleaning roller 804 to roll along the filter plate 2. During the rolling process, the cleaning roller 804 scrubs the filter plate 2, leaving the scale as much as possible in the liquid inlet cavity 3, automatically cleaning, ensuring the filtration efficiency, and thus ensuring the purification effect of phosphoric acid;

[0043] Finally, a backwash module 9 is provided to clean the extraction tank 1 by backwashing operation. The backwash solvent enters through the backwash solvent inlet valve 901 and exits through the backwash solvent outlet valve 902. The scale remaining on the filter plate 2 and the cleaned scale are flushed out together, making it easier to clean the extraction tank.

Claims

1. An easy-to-clean extraction device for preparing industrial-grade phosphoric acid, comprising an extraction tank (1), characterized in that: A vertically arranged filter plate (2) is provided in the extraction tank (1), and the filter plate (2) divides the extraction tank (1) into a liquid inlet cavity (3) and a liquid outlet cavity (4), and the liquid inlet cavity (3) and the liquid outlet cavity (4) are connected through the filter plate (2); a mixed liquid inlet valve (5) is provided on the side of the liquid inlet cavity (3) away from the filter plate (2); an upper liquid extraction valve (6) is provided on the side of the liquid outlet cavity (4) away from the filter plate (2); a lower liquid discharge valve (7) is provided at the bottom of the liquid outlet cavity (4); a cleaning module (8) is provided on the side of the filter plate (2) close to the liquid inlet cavity (3), and the cleaning module (8) cleans the filter plate (2); The cleaning module (8) comprises a mounting frame (801) arranged at the top of the liquid inlet cavity (3); a plurality of equally spaced electric telescopic mechanisms (802) are provided at the bottom of the mounting frame (801) in a direction parallel to the filter plate (2); the output end of each electric telescopic mechanism (802) is arranged vertically downward, and the output ends of the plurality of electric telescopic mechanisms (802) are all fixed to the same brush roller articulated frame (803); the brush roller articulated frame (803) forms a telescopic fit with the mounting frame (801) via the electric telescopic mechanism (802); a cleaning roller (804) is rotatably mounted in the brush roller articulated frame (803); the cleaning roller (804) forms a linkage fit with the electric telescopic mechanism (802) on the filter plate (2).

2. The easy-to-clean extraction device for preparing industrial-grade phosphoric acid according to claim 1, characterized in that: There are at least two electric telescopic mechanisms (802), and the electric telescopic mechanisms (802) are symmetrical about the middle position of the mounting frame (801).

3. The easy-to-clean extraction device for preparing industrial-grade phosphoric acid according to claim 2, characterized in that: The electric telescopic mechanisms (802) are parallel to each other and output synchronously; the fixed end of the electric telescopic mechanism (802) is detachably fixedly matched with the mounting frame (801); and the output end of the electric telescopic mechanism (802) is detachably fixedly matched with the brush roller hinge frame (803).

4. The easy-to-clean extraction device for preparing industrial-grade phosphoric acid according to claim 3, characterized in that: The mounting frame (801) is in the shape of a "door", and the bottoms of the vertical portions on both sides of the mounting frame (801) are fixedly mounted on both sides of the liquid inlet cavity (3), respectively, and the horizontal portion of the mounting frame (801) is parallel to the filter plate (2).

5. The easy-to-clean extraction device for the preparation of industrial-grade phosphoric acid according to claim 4, characterized in that: The cleaning roller (804) is a brush roller, and the bristles of the cleaning roller (804) are movably embedded in the filter holes of the filter plate (2).

6. The easy-to-clean extraction device for preparing industrial-grade phosphoric acid according to any one of claims 1 to 5, characterized in that: The extraction tank (1) is provided with a backwash module (9), and the backwash module (9) flushes in a direction from the liquid outlet cavity (4) to the liquid inlet cavity (3).

7. The easy-to-clean extraction device for preparing industrial-grade phosphoric acid according to claim 6, characterized in that: The backwash module (9) comprises a backwash solvent inlet valve (901) and a backwash solvent outlet valve (902), wherein the backwash solvent inlet valve (901) is arranged on a side of the liquid outlet cavity (4) away from the filter plate (2), and the backwash solvent outlet valve (902) is arranged on a side of the liquid inlet cavity (3) away from the filter plate (2), and a mixed liquid inlet valve (5) is provided.

8. The easy-to-clean extraction device for preparing industrial-grade phosphoric acid according to claim 7, characterized in that: The backwash solvent inlet valve (901) is located above the upper liquid extraction valve (6), and the backwash solvent outlet valve (902) is located below the mixed liquid inlet valve (5).

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