The best dedusting: review, specifications and operating rules

Aspiration – the process of ventilation of production premises with high dustiness. These areas are equipped with special filtration equipment. In particular, it uses Gas treatment and dust removal installation. This equipment is equipped with the facilities of different companies, from industrial plants for the production of bricks to grain processing plants. Consider next, what are the dust removal installation (UVP).

Classifications

Ventilation dust (UVP) is an equipment designed to filter the air. Separation of impurities is carried out in special filters.

Depending on the mechanism of action of these elements is divided na:

1. Gravitatsionnye.
2. Mokrie.
3. Elektricheskie.
4. Melanie.
5. Inertsionno.
6. Poristye.
7. Kombinirovannye.
8. Akusticheskie.
9. Cloth, etc.

The Main types of equipment

Depending on the degree of filter settings can be:

1. Coarse. The effectiveness of the detention of particles in such equipment is 40-70%. Such units include large cyclones, sedimentary camera.
2. The Average cleaning. They provide particle retention by 70-90%. This category include louvered, rotating assemblies, cyclones, etc.
3. Fine cleaning. In rates of detention of particles can achieve a 90-99.9%. This group includes the hose, electric, roll, rotary, foam units, etc.

Depending on the applications, the devices are divided into 2 categories. Included in the first units, used to filter ventilation and industrial emissions, second – devices for purification of running streams, and air masses returned to the shop for recycling. Enterprises can simultaneously use different dust removal installation. The price of the equipment ranges from 36 to 400 thousand rubles.

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Technical and economic indicators

It is determined By how effective Operation dust-collecting units of a specific enterprise. Key technical-economic indicators include:

1. Dust capacity.
2. Hydraulic resistance.
3. Performance.
4. The Efficiency of dust collection (total and fractional).
5. Power Consumption.
6. The value of the filter.
7. Maintenance Costs.

Comparative characteristics

The simplest is considered the Dedusting, mechanism of action which is based on gravity. Usually it is coarse filtration. The efficiency of particle collection is not more than 50%. Are absorbed while elements larger than 50 microns. Cyclone – more effective Dedusting. It filtering is based on the application of centrifugal force. During rotation, particles of the substances are discarded to the walls of the unit, and then crumble in a special tank. The purified air, spinning, coming out of the fitting through the pipe. The filtration efficiency of the cyclones is now 80-90%.

Currently these units have very different designs. If you need to clean a large amount of air flow several devices are combined in groups or used battery cyclones. They are represented by large numbers of small units installed in a single housing and placed in one bunker. The most popular today, however, are wet scrubbers. By contact with a liquid medium, the particles are wetted and become larger, and then removed from the apparatus in the form of sludge. Such aggregates can have very different structure. For example, it can be motociclon, disintegrator and so on.

The class wet installations include foam units. They are supplying water to the perforated grille. It passes through and filtered air. On the grid threshold is provided (the drain bulkhead). It allows you to keep a certain thickness of the foam layer. So Dedusting is highly efficient – up to 99%. The unit is capable of filtering particles greater than 15 microns. In the industry of manufactured devices has a GWP of LTI and PGS-TRL performance 3-50 thousand m/h.

Schemas

Foam Dedusting includes:

1. Reception box.
2. The Case.
3. Bars.
4. The Threshold.
5. Drain the box.

The Bag filter has the following syntax:

1. Inlet.
2. Sleeve.
3. Pendant.
4. Tapping mechanism.
5. An outlet.
6. Hopper.

The electrostatic Precipitator consists of:

1. Inlet.
2. Corona electrode.
3. Filter Housing (receiving electrode).
4. Outlet.
5. Hopper.
6. Rectifier.

Mechanism of action

The Bag mouth of theCommand ventilation dust Filters the air through the fabric. It is sewn in a special way and placed in the hermetic housing of the apparatus. The air is subjected to cleaning, sucked by the fan from the filter andemitted to the atmosphere. Periodically cleaning of the sleeves with the help of shaking mechanism with reverse scavenging. Filters can be pressurized and suction type. Is used in their production of dense synthetic or natural fabric. The effectiveness of the sleeves – 95-99%. In practice, the most common are filters FTNS, FRM, CCF.

The Devices are widely used in the purification of industrial and ventilation emissions. The mechanism of their work is based on the following: when you pass gas between two plates raznonapravlennymi ionization of the air environment. Ions and dust particles collide, the last to receive electric charges. Under their action, they begin to move towards the electrode of opposite sign and are deposited there. The filtration efficiency of such devices is 99.9%. Electrical installations are considered to be economical to operate. They can be filtered flows at a temperature up to 450 degrees. However, the installations cannot be used to capture explosive particles.

Specifics of aspiration

This process involves not just the elimination of dust from the air, and additional cleaning. The system operates so that it prevents the accumulation of particles and the creation of "tubes". It ensures uninterrupted operation of personnel and equipment in the room. Considering the huge amount of waste in industrial plants, it can be concluded that the aspiration becomes even more relevant in connection with the established standards and safety for the staff that work in harmful conditions.

This method differs from other methods of cleaning indoor air the fact that the systems are located at a certain angle. This prevents the formation of stagnant zones and locates the areas of maximum allocation of pollution. The outcome is a multiplier effect of filtering. The concentration of harmful compounds does not exceed the permissible limits.

Struzhkootsosy

The Aspiration system are used not only in the chemical and metallurgical industry, but also in woodworking, mills and crushing plants. In such areas the installation of filtering equipment requires special knowledge, so to install it invited professionals. Design of vacuum systems begins with examination of the premises. It on the basis of preliminary power calculations and equipment sizes. In the furniture industry there is a huge volume of fine waste. You must delete them from the workspace mandatory. This applies to a system struzhkootsosy. Equipment is considered to be a kind of suction apparatus.

Struzhkootsosy to remove particles whose diameter is 5 microns. In the cyclone of equipment, a special fan and filtered bags. A separate machine connected to struzhkootsosy through a system of flexible air duct of reinforced or corrugated pipe. The operating principle is quite simple. The fan sucks polluted air, which is filtered. Dust particles collected in the bag. From there they are sent to a special filter for the final cleaning. At maximum filling of the bag is removed and cleaned or replaced. Struzhkootsosy easy to connect, easy to transport.

Requirements

Devices should function smoothly, safely, with indicators corresponding to the project or received in the course of commissioning activities and agreed with the developer. Installation for purification of gas shall be equipped with auxiliary devices and equipment. When using these units, the responsible persons conduct documentation. It reflects the main indicators, which characterize the regime of operation of the equipment. In particular, we are talking about deviation from the optimal scheme of work, identified failures, failure of individual devices or of the entire complex as a whole, etc. All units must be registered in the state Inspectorate for gas cleaning. At least 1 time in six months should be carried out inspection units to assess the technical condition. This procedure is performed by a Commission appointed by the head of the company.

General rules of operation of gas-purifying and dust-collecting units

Do Not use technological equipment when you turn off the filtering apparatus. In each case, deactivate the cleaning device when functioning machine manual the organization must notify the state Inspectorate. It is necessary to obtain a consistent Supervisory authorities in the discharge permit.

During operation dust-collecting units for filtration of gas with high content of explosive (combustible) items to be especially careful to maintain the target pressure and the tightness of the structures, proper purging equipment and communications to avoid ignition and explosion.