Multi-frequency ultrasonic water treatment device with self-cleaning function

Abstract

The invention provides a multi-frequency ultrasonic water treatment device with a self-cleaning function, which achieves the purpose of reducing the hardness of water by matching a multi-frequency ultrasonic treatment technology with centrifugal separation, precipitation and filtration effects. The device is composed of a water inlet pipeline, a water outlet pipeline, a blow-off pipeline, an electromagnetic valve, a separation and purification area, a filter, a dirt cleaning area and a visible area. The ultrasonic generating device is arranged at the top of the ultrasonic treatment section; a rotational flow plate is arranged between the inner cylinder and the outer cylinder of the ultrasonic treatment section, a water outlet is formed in the upper part of the separation and purification area, a filter screen is additionally arranged at a pipeline of the water outlet, an ultrasonic vibrator is arranged on the outer wall surface of the dirt cleaning area for self-cleaning, and a visible area and a blow-off pipeline are arranged at the bottom of the dirt cleaning area. The multi-frequency ultrasonic water treatment technology is used for treating impurities in water, operation is easy, cleaning is convenient, and the effect is remarkable. The industrial water scale inhibitor can be widely applied to the industry, the hardness of industrial water is reduced, the influence caused by scaling in water equipment is eliminated, and effective operation of the industrial equipment is kept.

Description

Technical Field

[0001] The present invention relates to the purification process of industrial production water, in particular to a multi-frequency ultrasonic water treatment device with a self-cleaning function. Background Art

[0002] During the industrial production process, scaling problems of varying degrees generally exist, especially in various heat transfer processes. Due to the presence of dirt, the heat transfer capacity of heat exchange equipment will be reduced, the medium flow resistance will increase, and the performance will also decline accordingly, resulting in a series of economic losses. Removing scale from heat exchange equipment can improve heat transfer efficiency, reduce losses, and reduce waste of resources. Therefore, if technical pretreatment is carried out on water with a certain hardness to remove scale-forming components and effectively reduce the hardness of water, the impact of dirt on heat exchange equipment can be minimized as much as possible, which has great practical significance for the safe and stable production of industry, promoting energy conservation and emission reduction in China, improving energy utilization efficiency, and developing a green circular economy.

[0003] This device uses advanced ultrasonic treatment technology. Due to its advantages such as remarkable effect, pollution-free, low cost, and convenient use, it has been widely used in industry. During the propagation of ultrasonic waves in a liquid, various effects will be generated, including cavitation effect, mechanical effect, thermal effect, activation effect, etc., which will affect the microscopic properties of various molecules and ions in hard water, and then affect the crystallization process of scale-forming components. The ultrasonic scale inhibition technology uses an ultrasonic sound field to treat fluids to inhibit the formation of dirt and achieve the effect of cleaning the wall surface. However, the currently common single-frequency ultrasonic water treatment device has certain limitations in practical applications. The sound field of single-frequency ultrasonic is not uniform, prone to standing waves, and attenuates quickly when propagating in a solution, affecting the treatment effect. While multi-frequency composite ultrasonic uses multiple ultrasonic beams to propagate in the liquid simultaneously, which can increase the vibration amplitude, increase the mass transfer area, and make the sound field uniform. At the same time, multi-frequency composite ultrasonic can significantly enhance the cavitation effect and reduce the dead angle caused by standing waves. The mechanical disturbance of the liquid by multi-frequency ultrasonic acting simultaneously is greater than that of single-frequency ultrasonic. When multi-frequency ultrasonic acts simultaneously, more cavitation nuclei will be generated, making the cavitation effect of the multi-frequency system further improved compared with single-frequency action.

[0004] Under the action of multi-frequency ultrasound, the nucleation induction period of scale-forming components is shortened, the formation of tiny crystal nuclei in hard water is promoted, and the nucleation and growth of wall fouling crystals are inhibited. Furthermore, by separating the scale crystals precipitated in water, the purpose of purifying water quality can be achieved. There are many existing patents on single-frequency and multi-frequency ultrasonic treatment, but there are problems such as unclear working principles and unclear treatment effects, which have an adverse impact on the practical application of ultrasonic water treatment technology. Therefore, based on existing research, this patent application analyzes the combined action principle of multi-frequency ultrasound, clarifies the working range of ultrasonic waves in different frequency ranges and different treatment effects, and comprehensively treats the common scale-forming components (such as carbonate ions, sulfate ions, silicate ions, calcium ions, magnesium ions, etc.) in industrial cooling water. Through the water quality separation and purification area (including the lower frequency area and the higher frequency area), the scale-forming ions in hard water are completely separated, so that the cooling water is purified and discharged. At the same time, the fouling crystals precipitated from the separation and purification area are further treated in the fouling cleaning area and discharged through the sewage outlet. In this way, not only is the cooling water with a certain hardness effectively purified, but also the generated fouling is reliably treated, avoiding secondary pollution to the system equipment. Summary of the Invention

[0005] The purpose of this patent application is to provide a multi-frequency ultrasonic water treatment device with self-cleaning function to reduce the hardness of industrial water, eliminate the scaling problem in water-using equipment, improve the utilization efficiency of industrial water-using equipment and heat exchange equipment, and achieve the purpose of saving water and energy.

[0006] To achieve the above purpose, the technical solution adopted in this patent application is: a multi-frequency ultrasonic water treatment device with self-cleaning function, including a separation and purification area, a fouling cleaning area and a filter. Among them, an inner cylinder is provided in the separation and purification area, and a swirl plate is provided between the inner cylinder and the outer cylinder; the bottom of the separation and purification area is the fouling cleaning area, ultrasonic vibrators are arranged on the outer wall surface of the fouling cleaning area, the visual area is below the fouling cleaning area, and a sewage pipe is provided at the center of the bottom of the visual area, and the fouling is discharged from the sewage pipe of the fouling cleaning area; a water outlet pipe is provided at the center of the top cylinder cover, and the water after ultrasonic treatment flows out from the water outlet pipe after passing through the filter screen. The cylinder cover of the separation and purification area is respectively connected to the first ultrasonic transducer, the second transducer, the third transducer, the fourth transducer, the fifth transducer, the sixth transducer, the seventh transducer and the eighth transducer by flanges, and the transducer and the amplitude rod form an ultrasonic treatment device.

[0007] In the above ultrasonic water treatment device, the water in the separation and purification area is treated by ultrasonic waves, the fouling enters the fouling cleaning area from the lower part of the separation and purification area, and the water after ultrasonic treatment flows out at the upper water outlet pipe.

[0008] In the above ultrasonic water treatment device, the swirl plate between the inner and outer cylinder walls causes the water to flow in a spiral after entering the cylinder. After passing through ultrasonic treatment at four different frequencies in sequence, it enters the inner cylinder from below the separation and purification area for the second part of multi-frequency ultrasonic treatment, making the ultrasonic treatment more sufficient.

[0009] In the above ultrasonic water treatment device, the ultrasonic treatment device is connected to the cylinder cover through a flange, and the amplitude rod extends into the cylinder interior. The amplitude rods have the same size and shape but different frequencies, and are evenly distributed between the inner cylinder and between the inner and outer cylinders, working together to improve the efficiency of ultrasonic water treatment.

[0010] In the above ultrasonic water treatment device, the cross-sectional shape of the amplitude rod is stepped, and can be regarded as composed of a frustum of a cone and a cylinder spliced together. The splicing order from top to bottom is the frustum of a cone, a large cylinder, a frustum of a cone, and a small cylinder. The large cylinder is connected to the large bottom surface of the frustum of a cone, and the small cylinder is connected to the small bottom surface of the frustum of a cone. The diameter of the large bottom surface of the frustum of a cone is twice that of the small bottom surface. The height of the frustum of a cone is equal to the height of the large cylinder. The bottom area of the large cylinder is equal to the large bottom surface area of the frustum of a cone, and the bottom area of the small cylinder is equal to the small bottom surface area of the frustum of a cone. Splicing is repeated according to this rule. The tool head is made of titanium alloy. The stepped tool head can utilize the refraction effect of the inclined surface of the frustum of a cone on ultrasonic waves to strengthen the sound intensity of the ultrasonics propagating radially, making the ultrasonic field distribution in the cylinder more uniform.

[0011] In the above ultrasonic water treatment device, four ultrasonic rods are evenly arranged in the first part of the separation and purification area between the inner and outer cylinders of the separation and purification area. The four ultrasonic rods are set in sequence from low frequency to high frequency in the clockwise direction as 20 kHz, 28 kHz, 35 kHz, and 40 kHz. Four ultrasonic rods are also evenly arranged in the second part of the separation and purification area inside the inner cylinder, and their frequencies are 50 kHz, 60 kHz, 70 kHz, and 80 kHz from low frequency to high frequency in the clockwise direction. The common action of ultrasonic waves with different frequencies gives full play to the synergistic effect of multi-frequency ultrasonics, effectively strengthening the cavitation effect and improving the effect of ultrasonic water treatment. And for different water qualities, ultrasonic treatment is carried out through two different frequency bands respectively, and the comprehensive scale inhibition performance is improved through synergy to adapt to complex water quality conditions.

[0012] In the above ultrasonic water treatment device, the swirl plate enables the water flow to come into full contact with the ultrasonic treatment device multiple times, prolongs the time of ultrasonic treatment, enhances the effect of ultrasonic waves, greatly reduces the hardness of water, and enhances the water purification effect. And under the centrifugal action of the swirl, the separation effect of scale particles is enhanced, and there is a certain scouring effect on the wall surface so that dirt is not easily accumulated on the wall surface.

[0013] In the above ultrasonic water treatment device, the separation and purification area and the dirt cleaning area are connected up and down through a set of flanges.

[0014] In the above ultrasonic water treatment device, four ultrasonic oscillators with a frequency of 20 kHz are circumferentially and uniformly arranged on the outer wall surface of the dirt cleaning area to achieve self-cleaning of the wall surface of the dirt cleaning area, avoid scale deposition on the wall surface, and at the same time, the vibration effect will cause the precipitated dirt to concentrate downward for easy discharge.

[0015] In the above ultrasonic water treatment device, the dirt cleaning area and the visual area below are connected up and down through a set of flange plates. The material of the visual area is selected as transparent plexiglass, and the deposition of scale precipitated after being treated in the separation and purification area in the dirt cleaning area can be observed in real time, and the scale can be discharged in time.

[0016] In the above ultrasonic water treatment device, the visual area and the sewage discharge pipe are connected up and down through a set of flange plates for easy disassembly.

[0017] In the above ultrasonic water treatment device, a first solenoid valve, a second solenoid valve, and a third solenoid valve are respectively provided on the water inlet pipe, the sewage discharge pipe, and the water outlet pipe.

[0018] In the above ultrasonic water treatment device, the filter is equipped with a filter screen. The water treated in the separation and purification area is filtered by the filter screen above and then flows out from the water outlet. The filter screen of the filter can further purify the water quality to ensure that relatively clean water flows out.

[0019] The beneficial effects of the present invention are as follows: The present invention provides a multi-frequency ultrasonic water treatment device with a self-cleaning function. Under ultrasonic treatment, scale-forming ions in hard water are precipitated to form a large number of scale particles, which can effectively reduce the water hardness. The water flows through the lower-frequency area and the higher-frequency area of the separation and purification area in sequence, extending the time of ultrasonic treatment and enhancing the effect of ultrasonic waves. In the first part of the separation and purification area, that is, the lower-frequency area, the power is relatively high, which helps to promote the formation of easily crystallizable substances, causing most of the ions in the water to start to precipitate and aggregate into larger particles. Subsequently, the water enters the higher-frequency area for further refined treatment of the water with a lower concentration of scale-forming ions after preliminary treatment. The swirl plate in the first part enables the water flow to come into full contact with the ultrasonic treatment device multiple times, and under the centrifugal force of the swirl, the separation effect of scale particles is enhanced, and there is a certain scouring effect on the wall surface, making it difficult for dirt to accumulate on the wall surface. Under the synergistic effect of multi-frequency ultrasonic waves, the effect of ultrasonic water treatment is enhanced, the water hardness is greatly reduced, and the water purification effect is enhanced. And for different water qualities, ultrasonic treatment is carried out through two different frequency bands respectively, and the comprehensive scale inhibition performance is improved through the synergistic effect to adapt to complex water quality conditions. The filter screen of the outlet pipe can further purify the water quality to ensure that relatively clean water flows out. The self-cleaning device regularly cleans the wall surface of the dirt cleaning area to prevent scale from depositing on the wall surface. At the same time, the vibration effect will cause the precipitated dirt to concentrate downward, and the accumulation of dirt can be observed in real time through the visual area to ensure that the dirt precipitate is discharged in time. Under the given control parameters, the device operates stably, the water treatment effect is remarkable, and it is safe to use, simple to operate, and does not pollute the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings:

[0021] Figure 1 It is a schematic diagram of the present invention.

[0022] Figure 2 It is a schematic diagram of the top of the cylinder of the present invention.

[0023] In the figure: 1. cylinder cover; 2. first solenoid valve; 3. inlet pipe; 4. separation and purification area; 5. first amplitude rod; 6. swirl plate; 7. second amplitude rod; 8. ultrasonic vibrator; 9. sewage pipe; 10. second solenoid valve; 11. first transducer; 12. second transducer; 13. outlet pipe; 14. third solenoid valve; 15. third transducer; 16. fourth transducer; 17. flange; 18. filter screen; 19. third amplitude rod; 20. fourth amplitude rod; 21. inner cylinder; 22. dirt cleaning area; 23. visual area; 24. fifth transducer; 25. sixth transducer; 26. seventh transducer; 27. eighth transducer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The present invention will be described in detail below with reference to the accompanying drawings:

[0025] As shown Figure 1 in the figure, the present invention is composed of a separation and purification area, a filter, a dirt cleaning area and a visual area. Industrial water flows into the cylinder through the water inlet pipe 3, and first passes through the first part of the separation and purification area 4. Under the guiding action of the swirl plate 6, the inflowing water forms a right-handed flow and is processed by the ultrasonic rods in the lower frequency band for multiple times. Then it flows into the second part of the separation and purification area 4 from below the inner cylinder 21 and is fully processed by the multi-frequency ultrasonic waves of the ultrasonic rods in the higher frequency band in the inner cylinder 21. After the ultrasonic treatment, scale is precipitated from the hard water, and the scale enters the dirt cleaning area 22. The water in the separation and purification area 4 flows into the filter. A filter screen 18 is provided at the water outlet pipe 13 of the filter. Under the action of the filter screen 18 in the filter, through the filtering effect of the filter screen 18, relatively clean water flows out from the water outlet pipe 13. The dirt cleaning area 22 is below the separation and purification area 4. Ultrasonic vibrators 8 are provided on the outer wall surface of the dirt cleaning area 22 and are regularly turned on to perform self-cleaning on the dirt cleaning area 22 to prevent a large amount of dirt from accumulating on the wall surface. At the same time, the vibration effect will cause the precipitated dirt to concentrate downward. The dirt cleaning area 22 is connected to the visual area 23 below. The precipitation situation in the dirt cleaning area 22 is observed through the visual area 23. When necessary, the second valve can be opened to discharge the scale from the sewage pipe 9.

[0026] Among them, the ultrasonic treatment device includes a first transducer 11, a second transducer 12, a third transducer 15, a fourth transducer 16, a fifth transducer 24, a sixth transducer 25, a seventh transducer 26 and an eighth transducer 27. The ultrasonic transducers are connected to the amplitude rods to form ultrasonic rods. The ultrasonic rods are connected to the cylinder cover 1 at the top of the separation and purification area 4 through flanges 17, and the amplitude rods extend into the cylinder interior.

[0027] As shown Figure 2 in the figure, the ultrasonic transducers are connected to the cylinder cover 1 through flanges 17, and four ultrasonic transducers with different frequencies are evenly arranged in the first part of the separation and purification area 4 between the inner and outer cylinders and the second part in the inner cylinder 21 respectively.

[0028] The above two areas are both multi-frequency ultrasonic treatments, which enhance the cavitation effect compared with single-frequency ultrasonic waves and improve the water purification effect; the lower frequency area and the higher frequency area are used for zoning treatment of different scale-forming components in industrial cooling water, adapting to complex water quality conditions and prolonging the ultrasonic treatment time; the swirl plate in the lower frequency area enables the water flow to come into full contact with the ultrasonic treatment device multiple times. Under the centrifugal action of the swirl, the separation effect of scale particles is enhanced, and there is a certain scouring effect on the wall surface to prevent dirt from accumulating on the wall surface easily; the wall surface of the dirt cleaning area is regularly cleaned by the self-cleaning device to prevent scale from depositing on the wall surface. At the same time, the vibration effect will cause the precipitated dirt to concentrate downward. The accumulation situation of dirt is observed in real time through the visual area to ensure that the dirt precipitate is discharged in time.

Claims

1. A multi-frequency ultrasonic water treatment device with a self-cleaning function, characterized in that: It includes a water inlet pipe (3), a water outlet pipe (13), a sewage discharge pipe (9), a separation and purification area (4), a filter, a dirt cleaning area (22), a visual area (23) and an ultrasonic treatment device; wherein the water inlet pipe (3) is provided with a first solenoid valve (2), and the pipe extends into the separation and purification area (4); an inner cylinder (21) is provided in the separation and purification area (4), and a swirl plate (6) is provided between the inner and outer cylinders; the cylinder cover (1) at the top of the separation and purification area (4) is connected to a first transducer (11), a second transducer (12), a third transducer (15), a fourth transducer (16), a fifth transducer (24), a sixth transducer (25), a seventh transducer (26) and an eighth transducer (27) respectively by flanges (17), and the transducer and the amplitude rod form an ultrasonic treatment device; the ultrasonic transducer is connected to the cylinder cover (1) at the top position of the separation and purification area (4) through a flange (17), and the amplitude rod extends into the separation and purification area (4); a water outlet pipe (13) is provided at the central position of the top cylinder cover (1), and a filter screen (18) and a third solenoid valve (14) are provided on the water outlet pipe (13); the bottom of the separation and purification area (4) is a dirt cleaning area (22), and an ultrasonic vibrator (8) is provided on the outer wall surface of the dirt cleaning area (22); a visual area (23), a sewage discharge pipe (9) and a second solenoid valve (10) are connected below the dirt cleaning area (22).

2. The multi-frequency ultrasonic water treatment device with a self-cleaning function according to claim 1, characterized in that: The first transducer (11), the second transducer (12), the third transducer (15), the fourth transducer (16), the fifth transducer (24), the sixth transducer (25), the seventh transducer (26) and the eighth transducer (27) are respectively connected to the cylinder cover (1) through flanges (17).

3. The multi-frequency ultrasonic water treatment device with self-cleaning function according to claim 1, characterized in that: The amplitude rod is formed by sequentially splicing a plurality of frustums and cylinders; the specific splicing method is that the splicing order is a frustum, a large cylinder, a frustum, a small cylinder from top to bottom in sequence. The large cylinder is connected to the large bottom surface of the frustum, the small cylinder is connected to the small bottom surface of the frustum. The diameter of the large bottom surface of the frustum is 2 times that of the small bottom surface. The height of the frustum is equal to the height of the large cylinder. The bottom area of the large cylinder is equal to the area of the large bottom surface of the frustum, and the bottom area of the small cylinder is equal to the area of the small bottom surface of the frustum; and it is spliced repeatedly according to this rule.

4. The multi-frequency ultrasonic water treatment device with self-cleaning function according to claim 1, characterized in that: The separation and purification area (4) is connected to the cylinder cover (1) at the top through a flange. An inner cylinder (21) is provided inside the separation and purification area (4). The inner cylinder (21) is connected to the top cylinder cover (1) to divide the separation and purification area (4) into two parts: a lower frequency separation and purification area and a higher frequency separation and purification area. A swirl plate (6) is provided between the inner and outer cylinders.

5. The multi-frequency ultrasonic water treatment device with self-cleaning function according to claim 1, characterized in that: Four ultrasonic rods are evenly arranged in the first part of the separation and purification area between the inner and outer cylinders of the separation and purification area (4); the four ultrasonic rods are set to 20 kHz, 28 kHz, 35 kHz and 40 kHz in sequence from low frequency to high frequency in the clockwise direction; four ultrasonic rods are also evenly arranged in the second part of the separation and purification area inside the inner cylinder, and their frequencies are 50 kHz, 60 kHz, 70 kHz and 80 kHz respectively from low frequency to high frequency in the clockwise direction.

6. The multi-frequency ultrasonic water treatment device with self-cleaning function according to claim 1, characterized in that: A water outlet pipe (13) is provided at the central position of the top cylinder cover (1), and a filter screen (18) and a third solenoid valve (14) are provided on the water outlet pipe (13).

7. The multi-frequency ultrasonic water treatment device with a self-cleaning function according to claim 1, characterized in that: A dirt cleaning area (22) is provided below the separation and purification area (4) and is connected by a flange.

8. The multi-frequency ultrasonic water treatment device with self-cleaning function according to claim 1, characterized in that: Four ultrasonic vibrators (8) with a frequency of 20 kHz are evenly arranged circumferentially on the outer wall surface of the dirt cleaning area (22).

9. The multi-frequency ultrasonic water treatment device with self-cleaning function according to claim 1, wherein: A visual area (23) is provided below the dirt cleaning area (22) and is connected by a flange.

10. The multi-frequency ultrasonic water treatment device with self-cleaning function according to claim 1, characterized in that: A sewage discharge pipe (9) is provided below the visual area (23) and is connected by a flange. A second solenoid valve (10) is provided on the sewage discharge pipe (9).

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