Boric acid cleaning device

Abstract

The utility model relates to a boric acid cleaning device which comprises a cleaning tank, a stirring paddle is arranged in the middle of the cleaning tank, an output port is formed in the bottom of the cleaning tank and is in butt joint with an automatic centrifugal machine, and a discharging port is formed in one end of the bottom of the automatic centrifugal machine. A pump is arranged at one end of the cleaning tank, one end of the pump is connected with a first steam condensate pipe, the first steam condensate pipe is connected with a steam condensate water source, and the other end of the pump is communicated with the cleaning tank through a second steam condensate pipe. An elevator is arranged at the other end of the cleaning tank, the bottom of the elevator is a feeding port, and the top of the elevator is in butt joint with the top face of the cleaning tank. The cleaning tank is provided with a heat preservation function, waste heat of steam condensate is used for cleaning boric acid containing potassium iodide, and the cleaning and removing efficiency of potassium iodide in boric acid can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of solid material cleaning devices, in particular to a boric acid cleaning device. Background Art

[0002] Polarizers are a core component in the LCD panel industry. Iodine-based polarizers, made from a combination of iodine molecules and polyvinyl alcohol (PVA), have the highest market share in the polarizer production process. To prepare these polarizers, the PVA film is dyed in an iodine-containing solution. The main components of this solution are elemental iodine, potassium iodide, and boric acid. As the iodine solution is consumed during the dyeing process, the resulting iodine-containing waste liquid needs to be treated.

[0003] The common treatment method for iodine-containing wastewater involves pretreatment, distillation, and separation. By leveraging solubility differences and controlling the concentration ratio, a high content of boric acid can be obtained. However, the boric acid at this stage contains 1% to 5% potassium iodide, making it unsuitable for commercial use and requiring further purification. Currently, acidification is the most common method for purifying boric acid. Because boric acid is a weak acid, strong acids can be used to convert borates into boric acid. While this method is simple, the resulting salty filtrate is high in yield and difficult to process. Utility Model Content

[0004] In response to the shortcomings of the above-mentioned existing production technology, the applicant provides a boric acid cleaning device with a rational structure, which utilizes the waste heat of steam condensate to clean boric acid containing potassium iodide, thereby improving the cleaning and removal efficiency of potassium iodide in boric acid.

[0005] The technical solutions adopted in this utility model are as follows:

[0006] A boric acid cleaning device comprises a cleaning tank, wherein a stirring paddle is provided in the middle of the cleaning tank, an output port is provided at the bottom of the cleaning tank, the output port is connected to an automatic centrifuge, and a discharge port is provided at one end of the bottom of the automatic centrifuge; a pump is provided at one end of the cleaning tank, one end of the pump is connected to a No. 1 steam condensate pipe, the No. 1 steam condensate pipe is connected to a steam condensate water source, and the other end of the pump is connected to the cleaning tank through a No. 2 steam condensate pipe, and the steam pipeline is also included, and the steam pipeline extends to the bottom position of the cleaning tank. An elevator is provided at the other end of the cleaning tank, the bottom of the elevator is a feed port, and the top of the elevator is connected to the top surface of the cleaning tank.

[0007] As a further improvement of the above technical solution:

[0008] The outer wall surface of the cleaning tank is provided with a heat-insulating layer.

[0009] The insulation material of the insulation layer is high temperature resistant rock wool covered with aluminum plate.

[0010] A thermometer and a radar level gauge are installed on the top surface of the cleaning tank.

[0011] The stirring paddles adopt two pairs of triangular blades.

[0012] An on-off valve is installed on the No. 2 steam condensate pipe.

[0013] The No. 2 steam condensate pipe is connected to the top surface of the cleaning tank.

[0014] The pump is a stainless steel multi-stage centrifugal pump.

[0015] The beneficial effects of the utility model are as follows:

[0016] The utility model has a compact and reasonable structure and is easy to operate. Through the mutual cooperation between steam condensate, a pump, a cleaning tank, a hoist, an automatic centrifuge and various pipelines, it is convenient to utilize the waste heat of steam condensate to clean boric acid containing potassium iodide, and the cleaning and removal efficiency of potassium iodide in boric acid can be improved.

[0017] The utility model does not require the addition of acid for purification when cleaning boric acid. Because the concentration ratio of the iodine-containing waste liquid is controlled in the previous process, the obtained boric acid contains only 1% to 5% of potassium iodide. Since the solubility of potassium iodide is greater than that of boric acid, the small amount of potassium iodide contained in the boric acid can be fully dissolved in the cleaning water during the cleaning process at a temperature greater than 50°C. Finally, the potassium iodide content in the boric acid is less than 0.1%, and the boric acid content is greater than 99%.

[0018] The main facility cleaning tank of the utility model uses the steam condensed water of the distillation of the previous iodine-containing waste liquid as cleaning water, and an insulation layer is provided on the outside of the cleaning tank to ensure that the water temperature is maintained above 50°C during the cleaning process. The temperature is monitored by a set temperature sensor. If the temperature is lower than the set temperature, steam can be turned on for heating to ensure that the water temperature is within a reasonable range during the entire cleaning process. That is, the waste heat of the steam condensed water is fully utilized and the thermal insulation performance of the cleaning system is guaranteed to ensure the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of the present utility model.

[0020] Figure 2 It is a partial view of the present utility model.

[0021] Among them: 1. Steam condensate pipe No. 1; 2. On-off valve; 3. Steam condensate pipe No. 2; 4. Steam pipeline; 5. Pump; 6. Thermometer; 7. Radar level gauge; 8. Insulation layer; 9. Cleaning tank; 10. Hoist; 11. Output port; 12. Automatic centrifuge; 13. Discharge port; 14. Feed port. DETAILED DESCRIPTION

[0022] The specific implementation of the present utility model will be described below with reference to the accompanying drawings.

[0023] like Figure 1 and Figure 2 As shown, the boric acid cleaning device of this embodiment includes a cleaning tank 9, a stirring paddle is provided in the middle of the cleaning tank 9, an output port 11 is provided at the bottom of the cleaning tank 9, the output port 11 is connected to the automatic centrifuge 12, and a discharge port 13 is provided at one end of the bottom of the automatic centrifuge 12; a pump 5 is provided at one end of the cleaning tank 9, one end of the pump 5 is connected to the No. 1 steam condensate pipe 1, the No. 1 steam condensate pipe 1 is connected to the steam condensate water source, and the other end of the pump 5 is connected to the cleaning tank 9 through the No. 2 steam condensate pipe 3, and also includes a steam pipeline 4, which extends into the bottom position of the cleaning tank 9, and a hoist 10 is provided at the other end of the cleaning tank 9, the bottom of the hoist 10 is a feed port 14, and the top of the hoist 10 is connected to the top surface of the cleaning tank 9.

[0024] The outer wall surface of the cleaning tank 9 is provided with a heat-insulating layer 8 .

[0025] The insulation material of the insulation layer 8 is high temperature resistant rock wool covered with aluminum plate.

[0026] A thermometer 6 and a radar level gauge 7 are installed on the top surface of the cleaning tank 9 .

[0027] The stirring paddle adopts two pairs of triangular blades.

[0028] A switch valve 2 is installed on the No. 2 steam condensate pipe 3.

[0029] The No. 2 steam condensate pipe 3 is connected to the top surface of the cleaning tank 9 .

[0030] Pump 5 is a stainless steel multi-stage centrifugal pump.

[0031] The cleaning tank 9 is connected to the No. 2 steam condensate pipe 3 and the steam pipeline 4. The bottom of the stirring paddle in the cleaning tank 9 is two pairs of triangular blades. The bottom of the blade fits with the bottom of the cleaning tank 9, and the gap with the bottom body of the cleaning tank 9 is 0.5 cm. During the cleaning process, the blade setting can prevent boric acid from depositing at the bottom of the cleaning tank 9.

[0032] The design of the radar level gauge 7 and the thermometer 6 of the present invention can monitor the level and temperature of the cleaning water. In order to ensure the cleaning effect, the cleaning water needs to be kept at a certain temperature. The thermometer 6 can better monitor the temperature.

[0033] Pump 5 is a multi-stage centrifugal pump that can withstand temperatures up to 100°C. The material of the No. 2 steam condensate pipe 3 is 304 stainless steel, and the steam pipeline 4 is a DN25 carbon steel seamless pipe.

[0034] Steam condensate is used as cleaning water. The initial temperature of steam condensate reaches above 80℃, which has great potential for waste heat utilization. This device can make full use of the temperature of steam condensate to achieve better cleaning effect on materials.

[0035] In actual work process:

[0036] The pump 5 works to transport the steam condensate in the previous process to the interior of the cleaning tank 9 through the pump 5. Since the outside of the cleaning tank 9 is provided with a heat-insulating layer 8, the water temperature can be maintained above 50°C during the cleaning process and is detected by the thermometer 6; the boric acid material enters at the feed port 14, is lifted and transported to the interior of the cleaning tank 9 by the elevator 10, and the stirring paddle is started. The cleaning is carried out during the continuous stirring process, that is, the waste heat of the steam condensate is used to clean the boric acid containing potassium iodide, which greatly improves the cleaning and removal efficiency of potassium iodide in the boric acid, has good working reliability, is easy to operate, and is low in cost.

[0037] The above description is an explanation of the utility model, not a limitation of the utility model. The scope of the utility model is defined by the claims. Any form of modification can be made within the scope of protection of the utility model.

Claims

1. A boric acid cleaning device, characterized in that: The invention comprises a cleaning tank (9), wherein a stirring paddle is provided in the middle of the cleaning tank (9), an output port (11) is provided at the bottom of the cleaning tank (9), the output port (11) is connected to an automatic centrifuge (12), and a discharge port (13) is provided at one end of the bottom of the automatic centrifuge (12); a pump (5) is provided at one end of the cleaning tank (9), one end of the pump (5) is connected to a No. 1 steam condensate pipe (1), the No. 1 steam condensate pipe (1) is connected to a steam condensate source, and the other end of the pump (5) is connected to the cleaning tank (9) through a No. 2 steam condensate pipe (3); and the invention also comprises a steam pipeline (4), the steam pipeline (4) extends to the bottom position of the cleaning tank (9), and an elevator (10) is provided at the other end of the cleaning tank (9), the bottom of the elevator (10) is a feed port (14), and the top of the elevator (10) is connected to the top surface of the cleaning tank (9).

2. A boric acid cleaning device according to claim 1, characterized in that: The outer wall surface of the cleaning tank (9) is provided with a heat-insulating layer (8).

3. A boric acid cleaning device according to claim 2, characterized in that: The insulation material of the insulation layer (8) is high-temperature resistant rock wool covered with an aluminum plate.

4. The boric acid cleaning device according to claim 1, wherein: A thermometer (6) and a radar level gauge (7) are installed on the top surface of the cleaning tank (9).

5. The boric acid cleaning device according to claim 1, wherein: The stirring paddles adopt two pairs of triangular blades.

6. The boric acid cleaning device according to claim 1, wherein: An on-off valve (2) is installed on the No. 2 steam condensate pipe (3).

7. The boric acid cleaning device according to claim 1, wherein: The No. 2 steam condensate pipe (3) is connected to the top surface of the cleaning tank (9).

8. The boric acid cleaning device according to claim 1, wherein: The pump (5) is a stainless steel multi-stage centrifugal pump.

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