An overview of precision filters, how precision filters work

1) High filtration accuracy and uniform pore size of the filter element.

2) Low filtration resistance, large flux, strong sewage interception capacity and long service life.

3) The filter material is highly clean, and there is no pollution to the filter medium.

4) Resistant to chemical solvents such as acid and alkali.

5) High strength, high temperature resistance, and the filter element is not easy to deform.

6) Low cost, low operating cost, easy to clean, filter element replaceable. It is used for solid-liquid separation of various suspensions, with relatively high environmental requirements and high filtration accuracy, with a wide range of applications and suitable for medicine. Foodstuff.

Chemical industry. Environmental protection. water treatment and other industrial fields

The tank material can be divided into FRP tank, carbon steel tank, stainless steel tank, and can also be made according to user requirements.

Precision filters.

Also known as security filter), the shell of the cylinder is made of stainless steel, and the tubular filter elements such as PP meltblowing, wire burning, folding, titanium filter element, activated carbon filter element are generally used as filter elements, and different filter elements are selected according to different filter media and different design processes, so as to meet the demand for effluent quality. Now with the continuous development of the filtration industry, more and more industries and enterprises will use precision filters, and more and more enterprises have joined the ranks of precision filters.

How the precision filter works:

Precision filter (also known as security filter), the filter shell is generally made of stainless steel, and the internal use of wire burning, folding, titanium filter element, activated carbon filter element, PP meltblown and so on as the components of filtration, according to different filter media requirements using different filter components, in order to meet the requirements of effluent quality, the body can also be selected for quick assembly, which can easily and quickly replace the filter element and replacement.

This equipment is widely used in pharmaceutical, chemical, material, food, water treatment, petroleum, environmental protection, printing and other industries, and is an ideal equipment for filtration, purification and clarification treatment of various liquids.

Structural features of precision filters.

DPC precision filter has the characteristics of temperature resistance, large flow rate, long service life, simple operation, strong dirt holding capacity and good corrosion resistance. All kinds of coating equipment top cotton filtration and frame type, bag filter, used in food and medicine, chemical industry, water treatment and other occasions.

Precision filter product features:

1. High filtration efficiency: for liquid-solid filtration, the minimum can filter about the particles, for gas-solid filtration, the minimum can filter the particles about the left, the filtration rate is low.

2. High efficiency of draining the filter cake: the filter cake attached to the outer surface of the microporous tube can be removed quickly, effectively and safely by using the compressed gas rapid backflushing method.

3. High regeneration efficiency: the simple gas-liquid rapid backflush backflushing method can be used to regenerate the blocked microporous tube efficiently and quickly, and when the filter tube is used for a period of time, it can be regenerated by chemical methods to make the service life of the filter tube longer.

4. Superior chemical corrosion resistance: microporous tubes are resistant to various acids, alkalis, salts and most organic solvents, non-toxic, tasteless, and non-dissolved foreign substances, and are very suitable for applications in pharmaceutical, food, chemical, environmental protection and other industries.

How the precision filter works:

Precision filters are also known as security filters. The shell is made of high-quality stainless steel, and the filter element is made of formed filter material PP meltblown filter element, polypropylene filter element, wire-wound filter element, etc., under the action of pressure, the original liquid passes through the filter material, the filter residue is left on the filter material, and the filtrate flows out through the filter material, which can effectively remove impurities, sediments, suspended solids and bacteria in the water, so as to achieve the purpose of filtration.

The precision filter housing is made of stainless steel, and the filter uses a molded cartridge. Due to the action of pressure, the original liquid passes through the filter element, the filter residue remains on the filter element, and the filtrate flows out of the filter element, which effectively removes impurities and sediments in the water, and achieves the purpose of filtration, suspended solids, bacteria. The formed filter elements are filter cloth, filter screen, filter sheet, sintered filter tube, wirewound filter element, meltblown filter element, microporous filter element and multi-functional filter element.

Since the material of the filter is different, the pore size of the filter is also different. Precision filter is a type of filtration between sand filtration (coarse filtration) and ultrafiltration, and the pore size of the filter is usually in the range of 120um. The specifications of the same type of filter material depend on the external dimensions.

Commonly used high-efficiency precision filters, including precision filters, bag filters, etc.

Precision filters.

Bag filter.

Precision filters are generally more accurate than bag filters, here take precision filters as an example, the working principle of precision filters:

The precision filter, also known as the filter element filter and the security filter, is composed of two parts: the filter and the filter element, and the principle is to use the 5 m pore of the PP filter element for mechanical filtration. Trace suspended particles, colloids, microorganisms, etc. remaining in the water are trapped or adsorbed on the surface and pores of the filter element.

Under the action of pressure, the original liquid passes through the filter material, the filter residue remains on the filter material, and the filtrate flows out through the filter material, which can effectively remove impurities, sediments, suspended solids and bacteria in the water, so as to achieve the purpose of filtration. With the increase of water production time, the operating resistance of the filter element gradually rises due to the pollution of the retentate, and the filter element should be replaced when the water pressure difference between the inlet and outlet reaches the point of operation.

High-efficiency precision filters are an essential part of compressed air systems. These filters reliably remove liquid water, oil molecules, solid particles and other impurities from compressed air. Choosing the right filter can ensure that the compressed air from the oil-free or lubricated compressor can safely come into contact with food or medicine, ensuring the quality of the gas used and the quality of the product.

How High Efficiency Precision Filters Work:

The filter element of DPC high-efficiency precision filter adopts a straight-through open design, so that the filtered impurities can go directly to the reservoir cavity, without penetrating through the filter element, and are discharged through the automatic drain valve; The middle filter element is made of high-quality polymer filter material, which has a certain adsorption capacity for impurities such as oil mist, which fully guarantees the filtration effect; Part of the compressed air pours the inner wall of the filter element from top to bottom, so that the filtered impurities can be effectively removed, and at the same time reduce the resistance of the filter element to the compressed air.

High-efficiency precision filters are divided into Q-level primary filters, P-level pre-filters, S-class pre-filters and C-class precision filters.

Q-level primary filter: filtration accuracy 3, residual oil content 1ppm, filtration efficiency, can remove solid particles, water and oil.

P-class pre-filter: filtration accuracy 1, residual oil, filtration efficiency, can remove solid particles, water and oil.

Class S pre-filter: filtration accuracy, residual oil, filtration efficiency, can remove solid particles, water and oil.

Class C post-filter: precise filtration, residual oil, filtration efficiency, can remove solid particles, water and oil.

Cartridge replacement cycle for high-efficiency precision filters:

When it comes to filter efficiency, it's important to focus on filter replacement intervals, and many users believe that extending the operating life of the filter can reduce costs. On the contrary, the particle-laden filter element increases the pressure in the different parts of the compressor and increases the energy consumption of the entire compressed air station. Therefore, unless some new solution is applied, such as a filter environment monitor with a web help function, it is important to keep an eye on filter pressure changes.

When the combined cost of energy and filter costs are minimized, it is the best time to replace these filters. In other words, if the cost of the filter material is lower than the energy cost expected from the old filter, this is the best time to replace the filter.

It is mainly used to capture the following particulate dust and various suspended solids, and is used as the end filter of various filtration systems. Ultra-fine glass fiber paper is used as filter material, glue paper, aluminum foil board and other materials are folded as dividing boards, sealed with new polyurethane sealant, and made of galvanized sheet, stainless steel plate and aluminum alloy profile as the outer frame. Scope of use 1. Aquaculture circulating water treatment; 2. Cooling circulating water and industrial circulating water treatment; 3. Treatment of eutrophic water bodies such as rivers, lakes and household waterscapes; 4. Reclaimed water reuse; 5. Precision Electronic Instrument Factory;

Characteristics of precision filters.

1.The accuracy of filtering impurities, the pore size of the filter element and the filter hole is uniform;

2.The resistance during filtration is small, the flux is large, the filter has strong dirt interception ability, and the service life is long;

3.The cleanliness of the filter element material is high, and the filtered medium will not be polluted;

4.It can resist acid, alkali and other chemical solvents;

5.The strength of the structure is large, it can withstand high temperature, and the filter element is not easy to deform;

6.**Relatively low, low cost during operation, easy to clean, filter element can be replaced.

1) High filtration accuracy and uniform pore size of the filter element.

2) Low filtration resistance, large flux, strong sewage interception capacity and long service life.

3) The filter material is highly clean, and there is no pollution to the filter medium.

4) Resistant to chemical solvents such as acid and alkali.

5) High strength, high temperature resistance, and the filter element is not easy to deform.

6) Low cost, low operating cost, easy to clean, filter element replaceable.

You can go to us to see the specifics!

The main features of precision filters are:1.Due to the different filter media, the filter pore size is also different, 2The filter pore size is generally between the ranges, the filtration accuracy is high, and the pore size of the filter element is uniform.

3. Small filtration resistance, large flux, strong sewage interception ability and long service life.

4. The filter material has high cleanliness and no pollution to the filter medium.

5. Some types of materials such as 316 stainless steel are resistant to acid, alkali and other chemical solvents.

6. The filtration strength is large, the high temperature resistance, and the filter element is not easy to deform.

7. Low cost, low operating cost, easy to clean, and the filter element can be replaced.

8. It has a wide range of applications, suitable for pharmaceutical, food, chemical, environmental protection and other industries.

How to choose a precision filter

Precision filters can be used to remove oil, water and dust for the chemical industry, for the paint industry, for civil engineering dust removal, etc., because of the different requirements for compressed air in different industries, the selection of precision filter grades is generally not the same. Then the selection process of precision filter should not only consider the model and brand of precision filter, but also consider the grade of precision filter, whether the grade is qualified or not will directly affect the quality of the filter, quality is the lifeline of a company, so we should pay special attention to the selection of precision filter grade.

1. The core part of the precision filter is the filter element, which is composed of special materials, which is a suitable part and needs special protection;

2. When the precision filter works for a period of time, the filter element is loaded with a certain amount of impurities, then the pressure drop increases, the flow rate will decrease, and the impurities in the filter need to be removed in time, and the filter element should be cleaned at the same time;

3. When removing impurities, Xinxiang Haite filter specially reminds to pay attention to the precision filter element, which shall not be deformed or damaged, otherwise, the purity of the filtered medium after filtering the filter element will not meet the design requirements;

4. Some precision filter elements cannot be used repeatedly for many times, such as bag filter elements, polypropylene filter elements, etc.;

5. If the filter element is found to be deformed or damaged, it needs to be replaced immediately.

The material used in the precision filter element

The material of the filter element is divided into: paper, chemical fiber, metal mesh, metal powder sintering, PP filter element, line gap, activated carbon, etc. According to the use of the medium, the filter element is divided into: air filter element, water filter element, oil filter element.

The following mainly introduces several mainstream filter materials.

1. Pleated filter element. Polypropylene composite membrane is used as the main filter material, which is an advanced fixed depth filter element with a nominal filtration accuracy range from 60 m

2. Stainless steel filter element. The main filter material is made of multi-layer stainless steel sintered mesh, which can exert uniform surface filtration performance for the filter particle size of 2-200um. The stainless steel filter element is very strong, but its filtration accuracy and filtration efficiency are average, and it is often used in the filter element of the pre-filter.

3. Activated carbon filter element. The activated carbon filter element is made of activated carbon particles added to the binder and heated and sintered, which has the dual functions of filtration and purification, and the filter element has a nominal filtration accuracy of 10 microns. The pressure bearing capacity of the activated carbon filter element is not good enough, and it can only be used for low-pressure air filtration, but it has the advantages of decolorization and odor removal.

1. Shell: aluminum alloy;

2. Protective cover: plastic cup, polycarbonate, metal cup, aluminum alloy;

3. Filter element material: B and C series environmentally friendly special fibers, non-woven fabrics; D series, activated carbon;

Level indicator, metal cup, PV.

The shell of the precision filter cylinder is generally made of stainless steel, and the tubular filter elements such as PP meltblown, wire burning, folding, titanium filter element, activated carbon filter element are used as filter elements, and different filter elements are selected according to different filter media and design processes to meet the requirements of effluent water quality.

The precision filter is made of 304 or 316L stainless steel to remove solid particles, bacteria and other impurities from the fluid. The equipment has the characteristics of high pressure resistance, convenient replacement of filter element, large amount of water to be treated, small footprint, and good filtration effect.

Precision filters.

1.Filter Name: Precision Filter.

2.Number of cartridges (cartridges

3.Size of the filter element (mm)

4.Accuracy of the filter element (m):

5.Category of filter element: pleated (222 insert, 226 insert), titanium rod, ceramic.

6.Filter material: SUS304 SUS316 SUS316L

7.Operating pressure of the filter (lmpa): |

8.The size, construction, and size of the filter element depend on the design.

9.Material: Stainless steel (SUS) 304, SUS316, SUS316L

10.Filter element form: snap-in type 226, plug-in type 222 filter element.

11.Filter size: 10 inches, 20 inches, 30 inches, 40 inches.

12.Surface treatment: mirror polishing of the cylinder, mechanical or electrolytic polishing of the surface, matte sandblasting.

13.Working Pressure:

14.Housing material: stainless steel (SUS304, SUS304L, SUS316, SUS316L).

15.Operating temperature: 5 40 (more than 60 to be advised).

16.Design temperature: 5 -100 °C

18.Replace the differential pressure:

19.Filter element interface: flat pressure type, plug-in type.

20.Connection mode between cylinder and base: quick opening type, flange type.

21.Filtration accuracy:

22.Sealing form: O-ring or flat gasket.

23.Surface treatment: matte bead spraying, mirror electrolytic polishing.

24.Sealing material: rubber, silicone, fluoroelastomer, standard configuration is silicone seal.

25.Interface form: GB, HG, DIN, ANSI, JIS standard flange, tooth mouth, clamp, etc.

26.Flange standard: GB, HG, SH, HGJ, JB, ANSL, JIS and other standards. User specified, please indicate the pressure level.

27.Manufacturing and testing standards: implement GB150 standards, or user-specified standards.

Precision filters are widely used in the electronics industry, pharmaceutical industry, household drinking water, food and beverage, wine, beer, mineral water industry as pretreatment and terminal filtration.