Hydrofluoric acid CIP cleaning system

Abstract

The utility model discloses a hydrofluoric acid CIP cleaning system, a first waste water tank and a hydrogen fluoride temporary storage tank are connected with a hydrofluoric acid tank pipeline, the hydrofluoric acid tank is connected with a hydrofluoric acid cooler through a first hydrofluoric acid circulating pump and a second hydrofluoric acid circulating pump, and the hydrofluoric acid cooler is connected with the hydrofluoric acid tank. According to the utility model, the recycling of the CIP cleaning fluid is realized, the automation degree is improved, and the loss of the CIP cleaning fluid is reduced, so that the safety is improved.

Description

Technical Field

[0001] This utility model belongs to the field of hydrofluoric acid production technology, specifically relating to a hydrofluoric acid CIP cleaning system. Background Technology

[0002] CIP (Clean-in-Place) systems, also known as cleaning-in-place systems, are widely used in highly mechanized food and beverage production enterprises, such as those producing beverages, dairy products, juices, pulps, jams, and alcoholic beverages. They involve using high-temperature, high-concentration cleaning solutions to powerfully clean equipment and surfaces in contact with products without disassembling or moving the equipment. CIP systems are used for cleaning and purifying production equipment with strict hygiene requirements, typically operating in a closed-loop circulation within the equipment's piping and production line. CIP systems guarantee effective cleaning, improve product safety, save operation time and increase efficiency, save labor and ensure operational safety, conserve water and steam, reduce detergent usage, allow for larger-scale, highly automated production equipment, and extend the lifespan of production equipment.

[0003] Chinese patent CN217474259U discloses a CIP cleaning device, comprising: a cleaning tank containing a cleaning mechanism, the cleaning mechanism including a fixed pipe extending into the cleaning tank, a cleaning guide movably disposed within the fixed pipe, a support frame at the free end of the cleaning guide, a motor on the support frame, a rotating shaft driven by the motor, and a spray nozzle connected to the rotating shaft, the spray nozzle having multiple water outlets circumferentially open, the spray nozzle's height being adjustable by extending and retracting the cleaning guide, and the spray nozzle rotating vertically by the motor-driven rotating shaft; an acid / alkali tank, a clean water tank, and a delivery guide, the delivery guide being connected to the acid / alkali tank and the clean water tank respectively; and a temperature control chamber. After a preset settling time, the detergent is sent to the cleaning guide. This application can thoroughly clean the side and bottom walls of the cleaning tank, and the cleaning mechanism has a simplified structure, small size, and is easy to recycle and use; the temperature control chamber ensures that the prepared detergent achieves optimal cleaning effect, improving cleanliness.

[0004] Chinese patent CN210160106U discloses a CIP cleaning system, including a pipe to be cleaned, a micro-cleaning module, and a power module. The micro-cleaning module contains CIP cleaning fluid, and the power module drives the micro-cleaning module to move inside the pipe to be cleaned. The CIP cleaning fluid cleans the inner wall of the pipe along the movement path of the micro-cleaning module. By utilizing the micro-cleaning module to adapt to changes in pipe diameter and tortuousness, it can perform a comprehensive and thorough cleaning of the inner wall of the pipe, greatly reducing the amount of CIP cleaning fluid used and wastewater discharge, thus reducing environmental pollution.

[0005] However, current CIP cleaning systems are primarily designed for the food industry and have limited adaptability to chemical products. When applied to hydrofluoric acid production, the poor heat exchange capacity of the silver circulation during CIP cleaning solution preparation leads to violent reactions, easily causing hydrofluoric acid leakage and resulting in losses. This exacerbates damage to the rubber lining of equipment, increasing production risks. Furthermore, issues such as mismatched pipeline design specifications and the inability to recycle CIP cleaning solution also exist. Summary of the Invention

[0006] To address the aforementioned technical problems, this utility model provides a hydrofluoric acid CIP cleaning system that enables the recycling of CIP cleaning fluid, improves automation, reduces CIP cleaning fluid loss, and thus enhances safety.

[0007] To achieve the above objectives, this utility model provides a hydrofluoric acid CIP cleaning system, wherein a first wastewater tank and a temporary hydrogen fluoride storage tank are connected to a hydrofluoric acid tank pipeline, the hydrofluoric acid tank is connected to a hydrofluoric acid cooler via a first hydrofluoric acid circulation pump and a second hydrofluoric acid circulation pump, and the hydrofluoric acid cooler is connected to the hydrofluoric acid tank.

[0008] Preferably, the pipeline connecting the temporary hydrogen fluoride storage tank and the hydrofluoric acid tank is equipped with a second solenoid valve, a pneumatic valve, and a drain valve.

[0009] Preferably, a second drain valve is installed on the pipeline connecting the hydrofluoric acid tank and the first hydrofluoric acid circulating pump, and a first pressure gauge is installed on the pipeline connecting the first hydrofluoric acid circulating pump and the hydrofluoric acid cooler; a third drain valve is installed on the pipeline connecting the hydrofluoric acid tank and the second hydrofluoric acid circulating pump, and a second pressure gauge is installed on the pipeline connecting the second hydrofluoric acid circulating pump and the hydrofluoric acid cooler. Preferably, the first and second hydrofluoric acid circulating pumps are connected to the second wastewater tank via a flow meter and a third solenoid valve, and the second wastewater tank is connected to the hydrofluoric acid tank via pipeline.

[0010] More preferably, the third solenoid valve is connected to the washing device, the first fluorosilicic acid storage tank, the washing water tank, the secondary concentration tank, and the second tail washing tower pipeline, respectively.

[0011] More preferably, the third solenoid valve is connected to the pipeline of the primary concentration tank and the filter, and the primary concentration tank and the filter are connected to the hydrofluoric acid tank.

[0012] Preferably, the hydrofluoric acid tank is connected to the tail gas fan and the first tail washing tower pipeline respectively, and a first solenoid valve is provided on the pipeline connecting the hydrofluoric acid tank and the first tail washing tower.

[0013] Preferably, the hydrofluoric acid tank is connected to the temporary fluorosilicic acid storage tank and the second fluorosilicic acid storage tank via pipelines.

[0014] In a further preferred embodiment, a fourth solenoid valve is provided on the pipeline connecting the hydrofluoric acid tank and the second fluorosilicic acid storage tank.

[0015] Preferably, the hydrofluoric acid cooler is circulatedly connected to the chilled water storage tank.

[0016] The beneficial effects of this utility model are as follows:

[0017] 1. The addition of a hydrofluoric acid tank increases the capacity of the CIP cleaning solution containing hydrogen fluoride in the system. The CIP cleaning solution is stored and then the system is used to concentrate and recover the hydrogen fluoride contained in it, reducing waste, realizing recycling, and saving energy and reducing consumption.

[0018] 2. Add solenoid valves or other automatic regulating valves to the hydrofluoric acid pipeline to interlock with the opening degree of the automatic valve of the hydrofluoric acid tank and the chilled water for hydrofluoric acid cooling, as well as the frequency of the hydrofluoric acid circulation pump, to ensure a stable reaction during the preparation process and avoid hydrofluoric acid loss caused by excessively rapid heating. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model. In the figure, 1 is the exhaust gas fan, 2 is the wastewater tank, 3 is the first solenoid valve, 4 is the first tail scrubbing tower, 5 is the second solenoid valve, 6 is the temporary hydrogen fluoride storage tank, 7 is the pneumatic valve, 8 is the first drain valve, 9 is the hydrofluoric acid tank, 10 is the pressure gauge, 11 is the hydrofluoric acid cooler, 12 is the chilled water storage tank, 13 is the second pressure gauge, 14 is the first hydrofluoric acid circulation pump, 15 is the second drain valve, 16 is the flow meter, 17 is the third drain valve, 18 is the third solenoid valve, 19 is the second hydrofluoric acid circulation pump, 20 is the washing device, 21 is the first fluorosilicic acid storage tank, 22 is the washing water tank, 23 is the secondary concentration tank, 24 is the second tail scrubbing tower, 25 is the primary concentration tank, 26 is the filter, 27 is the second wastewater tank, 28 is the temporary fluorosilicic acid storage tank, 29 is the fourth solenoid valve, and 30 is the second fluorosilicic acid storage tank. Detailed Implementation

[0020] The technical solution of this utility model will be further explained below with reference to the accompanying drawings and specific embodiments. It is worth noting that the following embodiments are only preferred embodiments of this utility model and should not be construed as limiting this utility model. The protection scope of this utility model should be determined by the content of the claims. Modifications or substitutions made by those skilled in the art to the technical solution of this utility model without creative effort all fall within the protection scope of this utility model.

[0021] Example 1

[0022] like Figure 1As shown, a hydrofluoric acid CIP cleaning system includes a first wastewater tank 2 and a temporary hydrogen fluoride storage tank 6 connected to a hydrofluoric acid tank 9 via pipelines. This increases the system's capacity to hold the hydrofluoric acid-containing wastewater—the CIP cleaning solution—facilitating subsequent recycling. The hydrofluoric acid tank 9 is connected to a hydrofluoric acid cooler 11 via a first hydrofluoric acid circulation pump 14 and a second hydrofluoric acid circulation pump 19. The hydrofluoric acid cooler 11 is connected to the hydrofluoric acid tank 9 to exchange heat with the hydrofluoric acid-containing CIP cleaning solution stored in the tank, thereby reducing its temperature, preventing hydrogen fluoride from escaping and being lost, reducing damage to the equipment lining, extending the equipment's service life, and improving safety.

[0023] Preferably, the pipeline connecting the temporary hydrogen fluoride storage tank 6 and the hydrofluoric acid tank 9 is equipped with a second solenoid valve 5, a pneumatic valve 7, and a drain valve 8, which can control the amount of liquid in the temporary hydrogen fluoride storage tank 6 entering the hydrogen cyanide tank 9 and realize automated control.

[0024] Preferably, a second drain valve 15 is provided on the pipeline connecting the hydrofluoric acid tank 9 and the first hydrofluoric acid circulation pump 14, and a first pressure gauge 10 is provided on the pipeline connecting the first hydrofluoric acid circulation pump 14 and the hydrofluoric acid cooler 11; a third drain valve 17 is provided on the pipeline connecting the hydrofluoric acid tank 9 and the second hydrofluoric acid circulation pump 19, and a second pressure gauge 13 is provided on the pipeline connecting the second hydrofluoric acid circulation pump 19 and the hydrofluoric acid cooler 11; this allows for periodic discharge of wastewater, preventing excessive wastewater content from causing pressure buildup, and also facilitates maintenance; furthermore, the first pressure gauge 10 and the second pressure gauge 13 can monitor the pressure within the system in real time, preventing excessive pressure from causing safety risks. Preferably, the first hydrofluoric acid circulation pump 14 and the second hydrofluoric acid circulation pump 19 are connected to the second wastewater tank 27 via a flow meter 16 and a third solenoid valve 18, and the second wastewater tank 27 is connected to the hydrofluoric acid tank 9 via a pipeline, for recycling the CIP cleaning solution.

[0025] More preferably, the third solenoid valve 18 is connected to the washing device 20, the first fluorosilicic acid storage tank 21, the washing water tank 22, the secondary concentration tank 23, and the second tail washing tower pipeline, respectively, to output the CIP cleaning solution containing hydrofluoric acid after heat exchange and other treatments for concentration, washing and other processes.

[0026] More preferably, the third solenoid valve 18 is connected to the pipeline of the primary concentration tank 25 and the filter 26, and the primary concentration tank 25 and the filter 26 are connected to the hydrofluoric acid tank 9, so as to concentrate and filter the CIP cleaning solution respectively, which is convenient for recycling.

[0027] Preferably, the hydrofluoric acid tank 9 is connected to the exhaust gas fan 1 and the first tail scrubbing tower 4 pipelines respectively. The pipeline connecting the hydrofluoric acid tank 9 and the first tail scrubbing tower 4 is equipped with a first solenoid valve 3, which discharges and scrubs the exhaust gas generated by the hydrofluoric acid tank 9 respectively, reducing the impact on the environment, while avoiding system pressure buildup and reducing safety risks.

[0028] Preferably, the hydrofluoric acid tank 9 is connected to the temporary fluorosilicic acid storage tank 28 and the second fluorosilicic acid storage tank 30 via pipelines, so that fluorosilicic acid can be added to the hydrofluoric acid tank 9 as needed.

[0029] In a further preferred embodiment, a fourth solenoid valve 29 is provided on the pipeline connecting the hydrofluoric acid tank 9 and the second fluorosilicic acid storage tank 30 to realize automated control during the fluorosilicic acid feeding process.

[0030] Preferably, the hydrofluoric acid cooler 11 is circulatedly connected to the chilled water storage tank 12, which provides chilled water to the hydrofluoric acid cooler 11, thereby achieving efficient heat exchange with the CIP cleaning fluid, reducing the intensity of the reaction and minimizing leakage.

Claims

1. A hydrofluoric acid CIP cleaning system, characterized in that: The first wastewater tank (2) and the temporary hydrogen fluoride storage tank (6) are connected to the hydrofluoric acid tank (9) via pipelines. The hydrofluoric acid tank (9) is connected to the hydrofluoric acid cooler (11) via the first hydrofluoric acid circulation pump (14) and the second hydrofluoric acid circulation pump (19). The hydrofluoric acid cooler (11) is connected to the hydrofluoric acid tank (9).

2. The hydrofluoric acid CIP cleaning system according to claim 1, characterized in that: The pipeline connecting the temporary hydrogen fluoride storage tank (6) and the hydrofluoric acid tank (9) is equipped with a second solenoid valve (5), a pneumatic valve (7) and a drain valve (8).

3. The hydrofluoric acid CIP cleaning system according to claim 1, characterized in that: A second drain valve (15) is provided on the pipeline connecting the hydrofluoric acid tank (9) and the first hydrofluoric acid circulation pump (14), and a first pressure gauge (10) is provided on the pipeline connecting the first hydrofluoric acid circulation pump (14) and the hydrofluoric acid cooler (11); a third drain valve (17) is provided on the pipeline connecting the hydrofluoric acid tank (9) and the second hydrofluoric acid circulation pump (19), and a second pressure gauge (13) is provided on the pipeline connecting the second hydrofluoric acid circulation pump (19) and the hydrofluoric acid cooler (11).

4. The hydrofluoric acid CIP cleaning system according to claim 1, characterized in that: The first hydrofluoric acid circulating pump (14) and the second hydrofluoric acid circulating pump (19) are connected to the second wastewater tank (27) via a flow meter (16) and a third solenoid valve (18), and the second wastewater tank (27) is connected to the hydrofluoric acid tank (9) via a pipeline.

5. The hydrofluoric acid CIP cleaning system according to claim 4, characterized in that: The third solenoid valve (18) is connected to the pipelines of the washing device (20), the first fluorosilicic acid storage tank (21), the washing water tank (22), the secondary concentration tank (23), and the second tail washing tower (24).

6. The hydrofluoric acid CIP cleaning system according to claim 4, characterized in that: The third solenoid valve (18) is connected to the pipeline of the primary concentration tank (25) and the filter (26), and the primary concentration tank (25) and the filter (26) are connected to the hydrofluoric acid tank (9).

7. The hydrofluoric acid CIP cleaning system according to claim 1, characterized in that: The hydrofluoric acid tank (9) is connected to the tail gas fan (1) and the first tail washing tower (4) pipeline respectively, and a first solenoid valve (3) is provided on the pipeline connecting the hydrofluoric acid tank (9) and the first tail washing tower (4).

8. The hydrofluoric acid CIP cleaning system according to claim 1, characterized in that: The hydrofluoric acid tank (9) is connected to the temporary fluorosilicic acid storage tank (28) and the second fluorosilicic acid storage tank (30) via pipelines.

9. A hydrofluoric acid CIP cleaning system according to claim 8, characterized in that: A fourth solenoid valve (29) is provided on the pipeline connecting the hydrofluoric acid tank (9) and the second fluorosilicic acid storage tank (30).

10. A hydrofluoric acid CIP cleaning system according to claim 1, characterized in that: The hydrofluoric acid cooler (11) is circulatedly connected to the chilled water storage tank (12).

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