Diluted phosphoric acid cooling device

Abstract

The utility model discloses a dilute phosphoric acid cooling device, which relates to the technical field of phosphoric acid production and comprises a first shell, the top end of the first shell is fixedly connected with a second shell, the top end of the second shell is fixedly connected with a gas collecting hood, the bottom end of the first shell is fixedly connected with a water collecting cone, and a surface filter is mounted in the first shell. A distributor is fixedly connected to the interior of the second shell, a water inlet pipe is fixedly connected to the top end of the distributor, a plurality of mounting frames are fixedly mounted in the second shell, and anti-scaling heat dissipation pipes are mounted in the mounting frames. Dilute phosphoric acid is distributed on the outer surface of the anti-scaling heat dissipation pipe through the distributor, then the dilute phosphoric acid drips downwards layer by layer along the outer surface of the anti-scaling heat dissipation pipe, the dilute phosphoric acid is spread on the outer surface of the anti-scaling heat dissipation pipe, the contact area between the dilute phosphoric acid and air is increased, the dilute phosphoric acid makes full contact with the air, and heat dissipation of the dilute phosphoric acid is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of phosphoric acid production, in particular to a dilute phosphoric acid cooling device. Background Technique

[0002] At present, in phosphoric acid extraction production, after wet phosphoric acid extraction, the liquid is obtained through preliminary solid-liquid separation by a rotary disk, and further filtered and purified by a surface filter. As clean a dilute phosphoric acid as possible is obtained and enters the subsequent concentration system. The cleaner the dilute phosphoric acid, the higher the efficiency of the concentration system will be, and the scaling and blockage of the system will be prolonged.

[0003] The temperature of the acid after dilute phosphoric acid extraction is in the range of 55 - 60 °C. After passing through the loading tray, sedimentation tank and surface filter, the temperature is still in the range of 53 - 55 °C; the dissolved salts in the liquid do not precipitate, and after entering the concentration system together, a large amount of salts precipitate during the concentration process, resulting in a decrease in the concentration efficiency of the system, generating a large amount of white slag acid, and causing a reduction in direct economic value.

[0004] In order to solve the above problems, we made improvements and proposed a dilute phosphoric acid cooling device. Content of the Utility Model

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] The utility model provides a dilute phosphoric acid cooling device, which includes a first housing. The top of the first housing is fixedly connected with a second housing. The top of the second housing is fixedly connected with a gas collecting hood. The bottom of the first housing is fixedly connected with a water collecting cone. A surface filter is installed inside the first housing. A distributor is fixedly connected inside the second housing. The top of the distributor is fixedly connected with a water inlet pipe, and the water inlet pipe extends to the outside of the second housing. A plurality of installation frames are fixedly installed inside the second housing, and anti-scaling heat dissipation pipes are installed inside the installation frames.

[0007] As a preferred technical solution of the utility model, a motor is fixedly connected to the bottom of the gas collecting hood, and a fan is fixedly connected to the output end of the motor.

[0008] As a preferred technical solution of the utility model, a pneumatic flexible valve is fixedly connected to the bottom of the water collecting cone, and the top of the gas collecting hood is connected to an absorption tower.

[0009] As a preferred technical solution of the utility model, the anti-scaling heat dissipation pipe includes a skeleton and a rubber tube, and the rubber tube is coated on the outside of the skeleton. An inflation chamber is arranged between the skeleton and the rubber tube. A chamber is opened inside the installation frame, and the chamber is communicated with the inflation chamber.

[0010] As a preferred technical solution of the present utility model, first supports are fixedly connected to four corners at the bottom end of the first housing, and first cushion blocks are fixedly connected to the bottom ends of the first supports.

[0011] As a preferred technical solution of the present utility model, three second supports are fixedly connected to the bottom end of the water collecting cone, and second cushion blocks are fixedly connected to the bottom ends of the second supports.

[0012] The beneficial effects of the present utility model are as follows:

[0013] 1. In the present utility model, dilute phosphoric acid is pumped into the water inlet pipe by a pump according to the designed flow rate of the equipment. The dilute phosphoric acid is distributed on the outer surface of the anti-scaling heat dissipation pipe through a distributor, and then the dilute phosphoric acid drips downward layer by layer along the outer surface of the anti-scaling heat dissipation pipe. The dilute phosphoric acid is spread out on the outer surface of the anti-scaling heat dissipation pipe, increasing the contact area with air, enabling the dilute phosphoric acid to fully contact with air, and contributing to the heat dissipation of the dilute phosphoric acid.

[0014] 2. In the present utility model, the rubber hose is in an inflated state for a certain period of time and in an exhaust state for a certain period of time. During the process of inflating and exhausting the anti-scaling heat dissipation pipe, the surface area changes, thereby changing the surface tension. By changing the surface tension, scale cannot adhere to the surface of the anti-scaling heat dissipation pipe, maintaining the heat dissipation effect of the anti-scaling heat dissipation pipe. Description of the Drawings

[0015] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. They are used together with the embodiments of the present utility model to explain the present utility model, and do not constitute a limitation to the present utility model. In the drawings:

[0016] Figure 1 is a perspective view of the present utility model;

[0017] Figure 2 is a cross-sectional view of the present utility model;

[0018] Figure 3 is a cross-sectional view of the anti-scaling heat dissipation pipe of the present utility model;

[0019] In the figures: 1. First housing; 2. Second housing; 3. Air collecting hood; 4. First support; 5. First cushion block; 6. Second support; 7. Second cushion block; 8. Water collecting cone; 9. Pneumatic flexible valve; 10. Water inlet pipe; 11. Distributor; 12. Installation frame; 13. Anti-scaling heat dissipation pipe; 14. Motor; 15. Fan; 16. Skeleton; 17. Rubber hose; 18. Inflation chamber. Detailed Embodiments

[0020] The following describes the preferred embodiments of the present utility model with reference to the drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present utility model, and are not used to limit the present utility model.

[0021] Embodiment: As Figures 1-3 shown, a dilute phosphoric acid cooling device includes a first housing 1. A second housing 2 is fixedly connected to the top end of the first housing 1. A gas collecting hood 3 is fixedly connected to the top end of the second housing 2. A water collecting cone 8 is fixedly connected to the bottom end of the first housing 1. A surface filter is installed inside the first housing 1. A distributor 11 is fixedly connected inside the second housing 2. A water inlet pipe 10 is fixedly connected to the top end of the distributor 11 and extends to the outside of the second housing 2. A plurality of mounting frames 12 are fixedly installed inside the second housing 2. Anti-scaling heat dissipation pipes 13 are installed inside the mounting frames 12. A pneumatic flexible valve 9 is fixedly connected to the bottom end of the water collecting cone 8. The top end of the gas collecting hood 3 is connected to an absorption tower, and the entire device is connected to a PLC control system;

[0022] The dilute phosphoric acid is pumped into the water inlet pipe 10 by a pump according to the designed flow rate of the device. The dilute phosphoric acid is distributed on the outer surface of the anti-scaling heat dissipation pipes 13 through the distributor 11. Then the dilute phosphoric acid drips downward layer by layer along the outer surface of the anti-scaling heat dissipation pipes 13 to dissipate heat from the dilute phosphoric acid. Then the dilute phosphoric acid falls onto the surface filter for filtration. The dilute phosphoric acid passes through the surface filter inside the first housing 1 and is concentrated in the water collecting cone 8. The dilute phosphoric acid is spread out on the outer surface of the anti-scaling heat dissipation pipes 13, increasing the contact area with air and being more conducive to heat dissipation. Since the temperature of the dilute phosphoric acid decreases, fluorine gas in the dilute phosphoric acid is discharged, and a large amount of salts are precipitated in the dilute phosphoric acid. The latter-stage surface filter intercepts and filters, and the clean dilute phosphoric acid enters the concentration system to improve the product quality.

[0023] Specifically, as Figure 2 shown, a motor 14 is fixedly connected to the bottom of the gas collecting hood 3. An output end of the motor 14 is fixedly connected to a fan 15. Since the temperature of the dilute phosphoric acid decreases, fluorine gas in the dilute phosphoric acid is precipitated. The motor 14 drives the fan 15 to rotate, concentrating the fluorine gas in the gas collecting hood 3 and then discharging it into the absorption tower, increasing the concentration of fluorosilicic acid in the absorption tower and improving the economic value for the subsequent workshop to recover hydrofluoric acid.

[0024] Specifically, as Figure 2 and Figure 3As shown in the figure, the anti-scaling heat dissipation tube 13 includes a framework 16 and a rubber tube 17, and the rubber tube 17 is coated on the outer side of the framework 16. An inflation chamber 18 is arranged between the framework 16 and the rubber tube 17. A chamber is provided inside the mounting frame 12, and the chamber is communicated with the inflation chamber 18. An air inlet and an air outlet are respectively arranged at both ends of the mounting frame 12. The air inlet is connected to the main air pipeline (connected to the air compressor), the main air pressure is set at 0.1 Mpa, and the air outlet is connected to the exhaust pipeline. Set the time in the PLC control system. The rubber tube 17 is in an inflated state for a certain period of time and in an exhaust state for a certain period of time, so that the surface area of the anti-scaling heat dissipation tube 13 changes during the inflation and exhaust process, thereby changing the surface tension. Through the change of the surface tension, the scale falls off from the surface of the anti-scaling heat dissipation tube 13, and the heat dissipation effect of the anti-scaling heat dissipation tube 13 is maintained.

[0025] Specifically, as Figure 1 shown in the figure, four corners of the bottom end of the first housing 1 are fixedly connected with first support columns 4, the bottom ends of the first support columns 4 are fixedly connected with first cushion blocks 5, the bottom end of the water collecting cone 8 is fixedly connected with three second support columns 6, and the bottom ends of the second support columns 6 are fixedly connected with second cushion blocks 7. The entire device is supported by the first support columns 4 and the first cushion blocks 5, and the second support columns 6 and the second cushion blocks 7 are added to strengthen the support of the entire device to keep the device stable.

[0026] Working principle: Dilute phosphoric acid is pumped into the water inlet pipe 10 by a pump according to the designed flow rate of the equipment. The dilute phosphoric acid is distributed on the outer surface of the anti-scaling heat dissipation tube 13 through the distributor 11, and then the dilute phosphoric acid drips down layer by layer along the outer surface of the anti-scaling heat dissipation tube 13. The dilute phosphoric acid is spread out on the outer surface of the anti-scaling heat dissipation tube 13, increasing the contact area with the air, dissipating heat from the dilute phosphoric acid, and then the dilute phosphoric acid falls onto the surface filter for filtration. The temperature of the dilute phosphoric acid decreases, the fluorine gas in the dilute phosphoric acid is discharged, and a large amount of salts are precipitated in the dilute phosphoric acid and intercepted by the subsequent surface filter. The motor 14 drives the fan 15 to rotate, concentrating the fluorine gas in the gas collecting hood 3 and then discharging it into the absorption tower;

[0027] The air compressor inputs or discharges air into the chamber inside the mounting frame 12, thereby changing the pressure in the inflation chamber 18, causing the rubber tube 17 to expand or contract, so that the surface area of the anti-scaling heat dissipation tube 13 changes during the inflation and exhaust process, thereby changing the surface tension. Through the change of the surface tension, the scale falls off from the surface of the anti-scaling heat dissipation tube 13, and the heat dissipation effect of the anti-scaling heat dissipation tube 13 is maintained.

[0028] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements on some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A dilute phosphoric acid cooling device, comprising a first housing (1), characterized in that, The top end of the first housing (1) is fixedly connected to a second housing (2), the top end of the second housing (2) is fixedly connected to a gas collecting hood (3), the bottom end of the first housing (1) is fixedly connected to a water collecting cone (8), a surface filter is installed inside the first housing (1), a distributor (11) is fixedly connected inside the second housing (2), a water inlet pipe (10) is fixedly connected to the top end of the distributor (11), and the water inlet pipe (10) extends to the outside of the second housing (2). A plurality of mounting frames (12) are fixedly installed inside the second housing (2), and anti-scaling heat dissipation pipes (13) are installed inside the mounting frames (12).

2. The dilute phosphoric acid cooling device according to claim 1, characterized in that, The bottom of the gas collecting hood (3) is fixedly connected to a motor (14), and the output end of the motor (14) is fixedly connected to a fan (15).

3. The dilute phosphoric acid cooling device according to claim 1, characterized in that, The bottom end of the water collecting cone (8) is fixedly connected to a pneumatic flexible valve (9), and the top end of the gas collecting hood (3) is connected to an absorption tower.

4. A dilute phosphoric acid cooling device according to claim 1, characterized in that, The anti-scaling heat dissipation pipe (13) includes a skeleton (16) and a rubber tube (17), and the rubber tube (17) is coated on the outside of the skeleton (16). An inflation chamber (18) is provided between the skeleton (16) and the rubber tube (17). A chamber is formed inside the mounting frame (12), and the chamber is communicated with the inflation chamber (18).

5. The dilute phosphoric acid cooling device according to claim 1, characterized in that, Four corners of the bottom end of the first housing (1) are fixedly connected to first support columns (4), and the bottom ends of the first support columns (4) are fixedly connected to first cushion blocks (5).

6. The dilute phosphoric acid cooling device according to claim 1, wherein, Three second support columns (6) are fixedly connected to the bottom end of the water collecting cone (8), and the bottom ends of the second support columns (6) are fixedly connected to second cushion blocks (7).

Images