CN104258613A - Backwashing ultrasonic filter - Google Patents

Abstract

The invention discloses a backwash type ultrasonic filter, which comprises a filter core and a filter cloth. The porous filter core plays a supporting role, the filter cloth is fixed on the outer surface of the filter core, an outer cylinder is arranged on the periphery of the filter cloth, and the outer cylinder and the filter cloth form a filter chamber; There is an ultrasonic generator on the outer cylinder to shake off the filter residue on the filter cloth; there is a cover on the top of the outer cylinder, which is sealed by pressing the sealing ring; the outer cylinder is connected to the inlet, and the inlet is equipped with a sewage valve, an inlet valve and a pressure gauge; The cover is connected to the outlet, and the outlet is provided with an exhaust valve, an outlet valve and a pressure gauge. The structure design of the present invention is ingenious and simple, reasonable use of ultrasonic vibration combined with back rinsing, so that the impurities on the filter cloth can be effectively and thoroughly removed, and the washing water is very little; the device is simple and reliable, automatic and efficient operation, and the cleaning can be judged by the pressure gauge without opening the filter The level and working conditions can greatly reduce the labor intensity of the operator, and can also achieve short-term and quick cleaning, with broad application prospects.

Description

Backwash Ultrasonic Filter

technical field

The invention relates to a backwash type ultrasonic filter, which is especially suitable for water filtration.

Background technique

Filtration is a unit operation often used in food, chemical, pharmaceutical and other fields. In industrial production practice, many process links need to filter and purify water, especially the role of circulating water cooling system is particularly important. In the cooling water circulation system Among them, the cooling water is often affected by factors such as dust, water pipe corrosion, rust, and water impurities, making the cooling water dirty. There are many suspended particles in the water, and such cooling water is easy to pile up when passing through the interior of the equipment. Therefore, it is easy to block the water-cooling circulation pipeline, reduce the total heat transfer coefficient of the heat exchange surface, and deteriorate the cooling effect. Frequent cleaning of the water-cooling device or replacement of cooling water will bring great inconvenience to production.

Cloth filter is a very common filter, which is reliable, durable, low cost, and easy to maintain. However, the existing filter cloth filter has impurities on the filter cloth that are not easy to remove. , It is also difficult to achieve a more ideal effect, and it needs to be dismantled and cleaned frequently to ensure the effect, which has more inconveniences and seriously affects work efficiency.

Therefore, the existing filters cannot meet the requirements of production, especially the filtration of circulating water, and need to be improved.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, and provide a backwash ultrasonic filter with simple and reliable structure, which can automatically remove the filter residue on the filter cloth.

In order to overcome the deficiencies in the prior art, the present invention takes the following technical solutions:

A backwash type ultrasonic filter, comprising a filter element and a filter cloth, the filter element is porous to support, and the outer surface of the filter element is fixed with a filter cloth, characterized in that: an outer cylinder is arranged on the periphery of the filter cloth, and the outer cylinder and the filter cloth form a filter cavity; There is an ultrasonic generator on the outer cylinder to shake off the filter residue on the filter cloth; there is a cover on the top of the outer cylinder, which is sealed by pressing the sealing ring; the outer cylinder is connected to the inlet, and the inlet is equipped with a sewage valve, an inlet valve and a pressure gauge; The cover is connected to the outlet, and the outlet is provided with an exhaust valve, an outlet valve and a pressure gauge.

The cover is provided with a hand hole, which is convenient for manual cleaning of the filter cloth.

This design strives to realize the automatic removal of trapped impurities on the filter cloth and ease the work intensity of the operators. The pressure difference display can be used to judge the working status at any time, and prevent the normal operation of the equipment due to accidental work mistakes, thereby increasing the ideological pressure of the operators. The device can quickly complete the automatic cleaning of the filter cloth by taking advantage of the production interval, so as to realize the regeneration of the filtering effect.

The device adopts upper and lower cover structure, the cover surface has an upper sealing ring and a lower sealing ring, the upper and lower fixing and sealing are realized by tightening the sealing ring with fastening bolts, the porous filter core acts as a support, and the outer surface fixes the filter cloth.

When the filter starts to work, the water flow enters the filter cavity through the inlet valve, and passes through the filter cloth and filter element to filter impurities in the water to achieve the purpose of purification, and the filtered clean water enters the follow-up equipment through the outlet valve.

When there are many impurities on the filter cloth and the increase of fluid resistance affects the filtering effect, the counts of the inlet pressure gauge and the outlet pressure gauge will have a large difference. Clean and remove impurities on the filter cloth. At this time, close the inlet valve, slightly open the outlet valve, open the exhaust valve to discharge the air in the filter, and then close it. Turn on the ultrasonic generator. The ultrasonic generator can be arranged in multiple ways or controlled by a program. Realize the optimization of the vibration effect. At this time, the water in the filter is very different from the vibration characteristics of the structural components, and the filter residue on the filter cloth can be quickly shaken off. The filter residue can be discharged by opening the drain valve in the gap, and the slightly opened outlet valve will discharge the filter residue of the system. The water is poured back to achieve a certain degree of backwashing of the filter cloth and removal of filter residues. Ultrasonic vibration is combined with backwashing and slag discharge to achieve a good cleaning effect of ultrasonic vibration slag removal and backwashing to thoroughly clean the filter, which is conducive to the complete removal of filter residues, thereby To achieve the purpose of efficiently cleaning the filter cloth.

Due to the ultrasonic cavitation effect, the effect of shaking off the filter residue is remarkable but the amplitude is very small, so it will not cause adverse effects on the overall stability of the equipment. If there are some stubborn residues on the filter cloth, you can open the hand hole and use a high-pressure water gun to enter it. The filter cloth is backwashed under high pressure to make the effect reach the standard.

After the cleaning is completed, the operation of the valve is restored and the working state is restored, and the cleaning effect is judged by the readings of the inlet and outlet pressure gauges. The whole process is efficient, reliable and convenient.

Compared with prior art, the beneficial effect of the present invention also lies in:

The structural design is particularly ingenious and simple, and the reasonable use of ultrasonic vibration combined with back rinsing enables the impurities on the filter cloth to be effectively and thoroughly removed, with very little washing water; the device is simple and reliable, and operates automatically and efficiently, and the cleaning degree can be judged by the pressure gauge without opening the filter and working conditions, can greatly reduce the labor intensity of operators, and can also achieve short-term and quick cleaning, with broad application prospects.

Description of drawings

Fig. 1 is a schematic plan view of the present invention.

Each label in the figure means:

1. Outlet pressure gauge; 2. Outlet valve; 3. Hand hole; 4. Exhaust valve; 5. Cover; 6. Upper sealing ring; 7. Lower sealing ring; 8. Ultrasonic generator; 9. Outer cylinder; 10. Sewage valve; 11. Import pressure gauge; 12. Filter element; 13. Filter cloth; 14. Import valve. the

Detailed ways

Now in conjunction with accompanying drawing, the present invention is described in further detail.

As shown in Figure 1, the backwash ultrasonic filter includes a filter core 12 and a filter cloth 13, the filter core 12 is porous and plays a supporting role, the outer surface of the filter core 12 is fixed with a filter cloth 13, and the periphery of the filter cloth 13 is provided with an outer cylinder 9, and the outer cylinder 9 and The filter cloth 13 forms a filter cavity; the outer cylinder 9 is provided with an ultrasonic generator 8 to shake off the filter residue on the filter cloth 13; the outer cylinder 9 is provided with a cover 5, which is sealed by pressing the sealing rings 6 and 7; The cylinder 9 is connected to the inlet, and the inlet is provided with a blowdown valve 10, an inlet valve 14 and a pressure gauge 11;

The cover 5 is provided with a hand hole 3 to facilitate manual cleaning of the filter cloth 13 .

This design strives to realize the automatic removal of the trapped impurities on the filter cloth 13 and ease the work intensity of the operators. The pressure difference display can be used to judge the working status at any time, and prevent the normal operation of the equipment due to accidental work mistakes, thereby increasing the ideological pressure of the operators. , This device can quickly complete the automatic cleaning of the filter cloth during the production interval, and realize the regeneration of the filtering effect.

The device is an upper and lower cover structure, and the cover surface has an upper sealing ring 6 and a lower sealing ring 7, which are fixed and sealed up and down by tightening the sealing rings with fastening bolts. The filter element 12 is porous for support, and the outer surface is fixed with a filter cloth 13.

When the filter starts to work, the water flows into the filter cavity through the inlet valve 14, passes through the filter cloth 13 and the filter element 12 to filter impurities in the water, and achieves the purpose of purification. The filtered clean water enters the follow-up equipment through the outlet valve 2.

When there are many impurities on the filter cloth 13 and the fluid resistance increases to affect the filtering effect, the counts of the inlet pressure gauge 11 and the outlet pressure gauge 1 will have a large difference. 1. Anti-bleach cleaning removes the impurities on the filter cloth 13. Now close the inlet valve 14, slightly open the outlet valve 2, open the exhaust valve 4 to discharge the air in the filter and then close it, open the ultrasonic generator 8, and the ultrasonic generator 8 can be more A reasonable arrangement can also use program control to optimize the vibration effect. At this time, the water in the filter and the vibration characteristics of the structural components are very different, and the filter residue on the filter cloth 13 can be quickly shaken off. The gap can be opened. The filter residue is discharged, and the slightly opened outlet valve 2 pours back the water in the system to achieve a certain degree of filter cloth 13 backwash and filter residue removal. Ultrasonic vibration is combined with backwash and slag discharge to achieve ultrasonic vibration slag removal and backwashing to thoroughly clean the filter The good cleaning effect is conducive to the complete shedding of the filter residue, so as to achieve the purpose of efficiently cleaning the filter cloth 13.

Due to the ultrasonic cavitation effect, the effect of shaking off the filter residue is remarkable but the amplitude is very small, so it will not cause adverse effects on the overall stability of the equipment. If there are some stubborn residues on the filter cloth 13, you can open the hand hole 3 and use a high-pressure water gun Enter the filter cloth for high-pressure backwashing to make the effect up to standard.

After the cleaning is completed, the operation of the valve is restored and the working state is restored, and the cleaning effect is judged by the readings of the inlet and outlet pressure gauges 1 and 11. The whole process is efficient, reliable and convenient.

The above are only preferred embodiments of the present invention, and do not limit the present invention in any form. Any person familiar with the art, without departing from the scope of the technical solution of the present invention, can use the technical content disclosed above to make many possible changes and modifications to the technical solution of the present invention, or modify it into an equivalent implementation of equivalent changes example. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims (2)

1. A backwash type ultrasonic filter, comprising a filter core and a filter cloth, the porous filter core plays a supporting role, and the filter cloth is fixed on the outer surface of the filter core, it is characterized in that: an outer cylinder is arranged on the periphery of the filter cloth, and the outer cylinder and the filter cloth form a filter cavity body; the outer cylinder is equipped with an ultrasonic generator to shake off the filter residue on the filter cloth; the outer cylinder is provided with a cover, which is sealed by pressing the sealing ring; the outer cylinder is connected to the inlet, and the inlet is equipped with a sewage valve, an inlet valve and a pressure Table; the cover is connected to the outlet, and the outlet is provided with an exhaust valve, an outlet valve and a pressure gauge. 2. The backwashing ultrasonic filter according to claim 1, characterized in that: the cover is provided with a hand hole.