How to choose a suitable smoke filter?

If you want to buy a smoke filter, in the face of a variety of different appearance, material, use method of smoke filter, dazzling you are not very distressed, exactly should buy which kind of smoke filter?

There are many kinds of smoke filters, which can be classified according to the mechanism, shape, function, filter material, main body material, filter precision applicable scope and so on. Let's have a look at the basis for selecting suitable smoke filters.

Tips for choosing smoke filters

1. Filter material for smoke filter

According to the chemical name of the fluid to be filtered, find the available filter material according to the chemical combination taboo, and then evaluate one by one according to the operating temperature, operating pressure, PH value, operating conditions (such as whether to tolerate steam, hot water or chemical sterilization, etc.), and eliminate the inappropriate filter material.

Use is also an important consideration. For example, the filter material for a drug, food, or cosmetic must be an FDA-approved material. Ultrapure water should be selected as pure filter material without release which will affect the specific impedance. The filter gas should be made of hydrophobic material and whether a "sanitary filtration" design is required.

2. Accuracy of smoke filter

There are two filtration precision units, one is absolute precision, the other is nominal precision.

The definition and algorithm of the two kinds of precision are different. The filter precision of smoke filter is the minimum particle size that the filter medium can hold back on a certain filter equipment, the maximum particle size that enters filtrate, or the filter medium or filter (filter) can filter out particles of different size.

Nominal accuracy is not a standard that an industry can jointly identify and adhere to. The filtration accuracy of different products varies from company to company, and the fundamental solution is "trial".

3. Design of smoke filter

Which pressure source should be selected, what pressure is required, whether two sets of smoke filters should be installed in parallel to suit the continuous operation of the system, how to match coarse and fine filtration for the occasion of wide particle size distribution, whether the system should be equipped with a check valve or other devices... These all require working closely with the smoke filter supplier to find the most appropriate design.

4. How to use the smoke filter

Airtight filter: the filter bag is used together with the auxiliary smoke filter. The liquid is squeezed through the filter bag by using the system fluid pressure to achieve the purpose of filtration. It has the advantages of fast flow rate, large processing capacity and long service life of the filter bag, especially suitable for the occasions of large flow and closed filtration.

Artesian open filtration: the filter bag is directly connected to the pipe through the fitting joint and must be filtered by a fluid gravity differential. It is characterized by no equipment investment, simple and feasible filtration, especially suitable for economical liquid filtration of small size, multiple varieties and intermittent type.

5. The filtering degree of smoke filter

Surface filtration mainly adopts screen material:

Screen material (nylon monofilament, metal monofilament) will directly intercept the impurities in the filtration on the surface of the material. The advantages are that the single filament structure can be cleaned repeatedly and the consumption cost is low. The disadvantage is that the surface filtration mode, easy to cause the surface of the filter bag plug, this type of product is most suitable for low precision coarse filtration, filtration accuracy 25-1200 m.

6. The deep filtration of smoke filter is made of felt material:

Felt material (needled cloth, dissolved blown non-woven cloth) is a common deep THREE-DIMENSIONAL filtering material, characterized by loose fibrous tissue and high voidage, which increases the volume of impurities. This kind of fiber material belongs to the mode of compound interception, with high filtration efficiency. In addition, the high temperature surface heat treatment, namely the application of instant sintering technology, can effectively prevent the fiber from being dissipated by high-speed fluid belt during filtration. Felt material is disposable (disposable), filtration accuracy of 1-200 m.

Smoke filter product features

◆ The purification efficiency is over 99%, which can be directly discharged indoors;

◆ Generally used in single and double welding stations;

◆ Advanced program control, automatic ash cleaning;

◆ High air intake, good smoking effect and low noise;

◆ The equipment can carry out 360-degree free positioning;

◆ Easy to use and easy to maintain;

◆ Long service life of the filter element.

Daily maintenance of smoke filter

In the process of using industrial smoke filter, the collection plate will produce stain accumulation, which will increase the load of high voltage electric field and produce high voltage arc tension, and the purification effect will become worse or even completely lose the purification function. Therefore, regular inspection and cleaning is very important maintenance work.

1. Periodic inspection of industrial smoke filters

<1) Check the front and rear filter screens for mechanical damage or damage, as well as blockage by pollutants.

<2J check ionization and collector for mechanical damage, oil adhesion degree and plate deformation.

<3) Check whether the ionized wire is mechanically damaged, deformed and covered by oil.

<4) Check whether the electrical cabinet door, side panel, tuyere, back cover and other connections with the housing seal is good or not.

<5) Check whether all electrical components are normal.

<6) Check the high/low pressure and discharge terminals for stains and damage.

Note: The voltage of the ionized plate is very high. The above inspection should be carried out after the smoke filter is disconnected for l min.

2. Cleaning of industrial smoke filters

After the machine tool smoke filter is used for a period of time, some oil and stains will be attached to the ionization and collector assembly and the front and rear filter screen, which need to be cleaned. When the cleaning light on the smoke filter product panel comes on, it is indicated that the machine must be stopped for cleaning (the note label on the product is also specified). Cleaning smoke filter often use the general specifications of ultrasonic cleaning machine, although can remove oily dirt, but not completely, and the cleaned place will cause secondary pollution, and inconvenient.

That's all you need to know about smoke filters. I hope you find them useful.