Dust collecting installations pfts. Dust collectors Dry mechanical separators

Units for ventilation dust collecting UVP (Individual chip extractors of the UVP-IN series) designed to remove and purify air from chips and sawdust and collect waste in storage bags. Chip blowers are designed for use in small enterprises with a small amount of waste generated. The degree of air purification by the installations is 99.9%. The units are used to remove polluted air from individual machines or groups of machines and have an air capacity of up to 7000 m 3 /h. Due to the design features, the distance from the machine to the chip extractor, as a rule, should not exceed 2 m. The unit consists of a housing with a built-in dust fan, filters and waste collectors are attached to the housing using easily removable clamps.

CHARACTERISTICS OF CHIP BLOWERS UVP:

Productivity, m3 / hour
Air flow rate at the inlet, not less than m/sec.
Created vacuum, Pa
Degree of air purification, %
Number and diameter of air ducts, pcs/mm
Number and total volume of accumulators, pcs/m3
Unit overall dimensions, mm (length x width x height)					2450x1050x2500	Z090x1050x2540
Weight no more than, kg
Electric power / engine, kW

Execution options.

• For air purification from sawdust, shavings, chipboard chips, plastics, etc.
• To clean the air from sawdust, dust generated as a result of processing on milling machines MDF and similar materials with increased filtering area.
  When using the IN series units for air purification from chips, sawdust, dust resulting from the processing of MDF, chipboard, fiberboard and other materials in which the proportion of light fine fraction in the waste composition is relatively high, it is recommended to use filters with an increased filtration area. An increase in the area is necessary to reduce the gas-dust load on the filter material. This prevents deep penetration of dust particles into the material and increases the life of the filter. The units are designed for indoor use.

Dust Collector Model	Performance, m 3 / h	Installed power of electric motor, with frequency controller, kW	The volume of the dust collector m 3	Quantity suctions up to, pcs.	Weight, kg
Dust collecting unit PFC-1250	1250	1,1	0,3	1-2	83
Dust collecting unit PFC-1500	1500	1,5	0,3	1-3	86
Dust collecting unit PFC-2000	2000	2,2	0,3	1-4	91
Dust collecting unit PFC-3000	3000	4	2x0.3	1-4	153
Dust collection unit PFC-4000	4000	5,5	2x0.3	1-4	163
Dust collecting unit PFC-5000	5000	7,5	2x0.3	1-4	177
Dust collecting unit PFC-8000	8000	11/15	2x0.9	1-4	366

Overall dimensions of PFC dust collection units

Model	H	H*	h	d	A	B	c
Dust collecting unit PFC-1250	2430	2580	1305	140	1300	890	255
Dust collecting unit PFC-1500	2450	2600	1305	160	1300	890	255
Dust collecting unit PFC-2000	2500	2650	1310	180	1300	890	255
Dust collecting unit PFC-3000	2460	2610	1260	225	1980	835	-
Dust collection unit PFC-4000	2520	2670	1260	250	1980	835	-
Dust collecting unit PFC-5000	2580	2730	1260	280	1980	835	-
Dust collecting unit PFC-8000	2970	3120	2190	355	2470	1060	-

Payment Methods:

• By bank transfer for legal entities VAT included.

Delivery in Moscow and Moscow region:

• Transport company Business lines or PEK, others by agreement.
• Goods "in stock" can be picked up from the warehouse on the day of enrollment Money to our checking account.
• Delivery is carried out within 1-2 business days from the moment your order is ready.

Delivery across Russia:

• Transport company (TK) Business lines or PEK, others by agreement. Delivery to the terminal TK - FREE OF CHARGE. (3 times a week).
• The cost of delivery of shopping malls depends on the region. Our managers will calculate all the options and offer the most convenient and profitable delivery method for you.
• Our vehicles in the shortest possible time. Shipping costs are calculated based on the volume and weight of the shipment.

Guarantees

• Our company sells exclusively new goods, which are covered by a factory warranty from 12 months to 36 months.

PFC dust collection units are designed for fine air purification inside small and medium-sized industrial and agricultural premises. They can be used to clean the air from wood dust and suspended chips in the woodworking industry. The highest dust content of the working environment is 15/5 g/m.cub. (in the ratio of large suspended fractions / dust).

The minimum air purity at the outlet of the PFC dust collector is 0.5 mg/m3.

Design features

PFC dust collection units are mobile, produced in the form of a monoblock, delivered to the customer assembled in the manufacturer's packaging.

The main components of the dust collecting unit of the PFC series include the following structural elements:

The body is a load-bearing steel element of a welded structure, on which the rest of the components and parts of the equipment are located. A cyclone element is located in the housing, in which primary gravitational air purification from large suspended particles (the first purification stage) is performed. In the cyclone, the air swirls, due to which the particles, under the action of centrifugal force, are pressed against the walls of the cyclone and settle in the dust collector.

At the bottom of the case is a dust bag, which is removed as it fills to clean and dispose of the collected dust and debris. In the upper part of the housing there is a cassette filter made of class F9 filter paper, where fine air purification takes place (the second stage of purification). In comparison with the filter sleeve (as, for example, in dust collectors and chip extractors PUA-M), the cassette paper filter provides finer cleaning and has a longer resource.

In the basic version, together with the cassette, the unit is equipped with a manual regeneration system inner surface, but at the request of the customer, it is possible to retrofit the PFC dust collector with an automatic regeneration system.

Emission of purified air is made directly into the atmosphere of the room. The air is forced to move by a low-noise dust fan mounted on the case. An asynchronous electric motor is used as a drive. The inlet pipe of the fan has a circular cross section and is directed downwards (it is possible to connect an air sleeve or a non-extended air duct).

Manufacturing options

The standard size range of PFC dust installations includes 7 standard models.

Installations for dust and chips PFTs-1250, PFTs-1500 and PFTs-2000 are produced in a single version. The remaining models of PFC dust-collecting units are made in a group version (two cassettes and two dust collectors each).

The choice of the required model is carried out according to the nominal capacity, taking into account the actual operating conditions.

terms of Use

PFC dust collectors are subject to operation indoors under U2 conditions in accordance with GOST 15150.

If special measures are not taken to remove mechanical waste and dusty air from working area woodworking machine, the surrounding space soon after the start of work becomes unsuitable for a person who is not equipped with personal protective equipment, and is extremely fire hazardous. Dust collecting (aspiration) installations are intended to clean the atmosphere production premises to make the work of the staff comfortable and safe.

APPLICATION AREA

Autonomous dust-collecting (aspiration) devices are used in industrial premises, which it seems impossible or impractical to equip with a centralized air purification and waste disposal system. Such installations are mainly used in areas for the processing of wood and similar materials of small enterprises in the furniture, construction and other industries.

DESIGN FEATURES

Structurally, the cleaning scheme of the mixture of air with chips and sawdust removed from the zone machining creating a vacuum with an exhaust fan, is filtering it by passing it through a layer of fabric from which the receiving container is made. The solid component of the mixture separated by the filter is deposited in the lower part of the device, which acts as a waste collector.

A high degree of air purification, reaching 99.9%, makes it possible to free workers from the need to use personal protective devices (respirators, etc.) and reduce the level fire hazard up to the standard level.

The design of most modern woodworking machines provides for the possibility of connecting them to a shop aspiration system or to a dust collection unit.

Dust collecting devices are equipped with both one and several filtering units, consisting of fabric bags located one above the other: a filter and an accumulator. Depending on the volume of waste emitted by the equipment, it is possible to select an installation of the appropriate capacity. As a rule, several emission sources can be connected to one unit.

Many models of dust collectors can be used in vacuum cleaner mode when cleaning the production area.

MAIN ADVANTAGES

Dust collecting installations have become an indispensable element in the organization of woodworking production. Without such devices, it is impossible to fulfill the requirements for working conditions established by sanitary standards and ensure compliance with fire safety standards.

In the process of manufacturing a variety of furniture products, a significant amount of fine dust and particles of the original blanks is produced. Such dust not only worsens the working conditions of production personnel, but also contributes to possible failures of moving parts of equipment. That is why in mass woodworking processes provide for the presence of dust-collecting installations.

Principle of operation and device

The systems under consideration perform the function of collecting and removing dust and small industrial waste, which includes such unsafe components as resins, alkaloids, toxic organic and inorganic particles. When inhaled as dust, they can cause a wide range of allergic reactions, skin problems, and respiratory problems. Often used in woodworking, plywood, MDF, and chipboard are especially problematic because of the adhesive resins needed to make them. The sequence of operation of modern dust-collecting ventilation systems consists of the following steps:

1. Capturing dust at sources of its occurrence.
2. Extraction of small wood particles with suction fans.
3. Fraction filtering.
4. Disposal in special dust collectors.

   To implement the tasks set, the dust collection plant includes an air duct system, a set of coarse and fine filters, supply and exhaust fans, waste collection containers. Appropriate areas are necessarily provided for when designing production sites, and the balance of energy costs includes the consumption of electricity to drive the moving parts of the equipment in question.

   In order to reduce the noise level, the installation of engines and prefabricated blocks is usually carried out outside the production area. At the same time, it simplifies access for cleaning and maintenance of all components of the dedusting ventilation units.

   How operating parameters are selected

   The initial indicators for choosing the size and power of the dust collection plant are:

   • Volume of air (in m3/min) to be moved/removed;
   • The maximum possible concentration of dust (MAC) in the room;
   • The complexity of the duct system.

To remove fine wood dust in the branches for adequate extraction of dust into the main duct, a capacity of at least 110 ... 130 m3 / min is usually required. Depending on how many pieces of production equipment are connected to the system and how long the ductwork is, one or more ventilation units may be required.

In accordance with the hygiene standards established by Rospotrebnadzor (GN 2.1.6.1125-2002), the MPC of dust in woodworking areas is 0.5 mg/m3, while the MPC of harmful components should not exceed 30% of the specified norm. Proper installation and grounding of the collection system (and especially ductwork) is important to prevent accumulation static electricity and development of negative pressure levels provided by air ventilation.

Brief description of the components of the dust collection system

The choice of the type, number and performance of filters is decisive. Modern filtration filtration units contain washable pre-filters. They trap dust particles as small as 3 microns (smaller particles are caught by smoke filters).

Inside the filtration unit is a disposable bag, the dimensions of which depend on the performance of the unit. In woodworking industries, it is recommended to install combined filters that allow you to purify the air, both in the area of ​​\u200b\u200bthe machine and in the general room.

Some of the dust extractor units are supplied with local task lighting, making them good choice for installation directly at technological equipment. Preference is given to equipment, which includes a remote control.

The main requirement for the ventilation unit is the ability to capture toxic aerosols, fog, gases, vapors, smoke and dust while effectively filtering the air entering the air ducts.

The MDM-TECHNO company offers design, supply, installation supervision and field supervision services for the operation of dust collection systems. Upon conclusion of an agreement qualified specialists companies will fulfill technical justification of the project, will select the appropriate equipment, install and connect it with high quality. Customers are provided with a certificate of quality. Possibility of post-warranty maintenance of equipment.

Centrifugal dust collectors

Centrifugal dust collector is the most common type of mechanical dust collector, which is applied in food, chemical, mining and many other industries. The main advantage of such dust collectors is their low cost, high performance, simplicity of the mechanism, as well as fairly simple and inexpensive operation. Compared with other types, centrifugal dust collectors have the advantages of reliable operation at high temperature and pressure, no moving parts, easy repair and manufacture, and can be used to capture abrasive particles.

Centrifugal dust collectors use centrifugal force to capture dust. The most popular centrifugal dust collectors are wet film cyclones. In such devices, the deposition of particles occurs through the action of a centrifugal and inert mechanism. Consequently, the efficiency of such apparatuses is much higher than that of cyclones, because dust re-entrainment does not occur due to the presence of a wet film. In addition, such devices are more efficient than scrubbers due to the fact that the speed of droplets and gas flow in them is much higher due to centrifugal force.

In wet cyclones, liquid is supplied along the inner walls of the apparatus and into its axial zone.

The most efficient wet dust collector is the Venturi scrubber, which is a high-speed scrubber. Such installations can be divided according to the area of ​​\u200b\u200buse into:

• Low-pressure, used to concentrate and purify aspiration air. The hydraulic resistance of such devices ranges from 3000 to 500 Pa.
• High-pressure devices are used to purify gases from submicron and micron dust. Their resistance reaches 20000-30000 Pa.

The operation of such devices is based on a high-velocity gas flow, which performs intensive crushing of the liquid that irrigates it. And due to the turbulence of the gas flow, as well as a rather large difference between the speed of liquid drops and particles, dust particles are deposited on the liquid drops that irrigate it.

In order to reduce hydraulic resistance, the main part of the scrubber is made in the form of a Venturi tube, which smoothly narrows at the inlet of gases and expands at their outlet. The inlet and outlet of gases are connected by means of a nozzle.

For the stable operation of the apparatus, it is very important that there is a complete and uniform irrigation of the section of the liquid neck. That is why the choice of irrigation method is very important and affects the design of the apparatus.

Most often, three methods of irrigating the neck are used:

1. Peripheral. With this method of irrigation, nozzles or nozzles are mounted around the perimeter of the neck or confuser.
2. Central. Irrigating liquid enters the neck from nozzles that are installed in the confuser or in front of it.
3. Film. It is used most often in order to prevent the formation of deposits on the walls.

To calculate the hydraulic resistance, the expression is used:

Δp = Δp g + Δp f

In which Δp g is the hydraulic resistance of a dry pipe, which is due to the movement of gas:

Δp g = (ξ c ν g ² ρ g)/2

Where ξ c is the coefficient of hydraulic resistance of a dry pipe,
and ν g is the speed of the gases that are in the neck.

The efficiency of dust capture depends most of all on the specific irrigation and gas velocity. The optimal ratio of dust flow rate and specific irrigation primarily depends on the disperse composition of the dust. While the specific value of irrigation is in the range of 0.5-1.5 l/m 3 gases.

In addition, the efficiency of dust collection depends on the dispersion of the droplets of the atomized liquid. At the same time, the smaller the drops, the better the gas is cleaned.

To determine the average droplet diameter, an empirical formula is used:

d k \u003d 4870 / ν² + 28.18 m 1.5

Centrifugal dust collectors (cyclones) received active use in industry. Polluted gas at a speed of 20 to 25 m/s enters the cyclone body. The gas flow moves tangentially, as a result of which it acquires a rotational motion. Dust particles are thrown back by centrifugal force and fall into the extreme layers of polluted gas, which move in a spiral down along the walls of the cyclone. Suspended dust particles are removed from the unit through a special outlet pipe. The mixture of gas and dust rotates and rises, resulting in a vortex. This vortex moves in the direction of the installation axis to the exhaust pipe and captures with it part of the gas moving down from the inner layers. This layer of gas is characterized by a low content of dust particles. It moves along the conical part of the body to the lower edge of the exhaust pipe. Upon reaching the lower edge of the exhaust pipe, the flow turns towards the axis of the cyclone.

Vortex dust collectors. Specifications

Vortex dust collectors are used more and more in industry. Such an apparatus resembles a cyclone, but its feature is the presence of an additional swirling gas flow in it. Produced in the world various models such dust collectors, having a capacity of 300-40000 m 3 /hour. The performance of vortex dust collectors increases with a decrease in diameter.

In vortex dust collectors atmospheric air, dusty gases, as well as the peripheral part of the pure gas flow are used as a secondary gas.

When comparing swirl dust collectors with countercurrent cyclones, the former have such advantages as working with gases high temperature, good degree of purification, adjustment of the gas purification process from dust by adjusting the secondary air flow. Among the disadvantages of vortex dust collectors, high hydraulic resistance, the need for a powerful draft device, as well as complex operation and installation should be highlighted.

d cr \u003d √ (ν² / H) (18μ g ln) / ([ρ h -ρ z] ω²)

in which H - is the high working area,
D tr - diameter of the conductive pipe,
D 1 is the diameter of the device itself,
ω - angular velocity of the purified gas.

Vortex dust collector

The design of the vortex dust collector can be seen in the figure. In such an apparatus, the untreated gas flow enters the apparatus through the nozzles, twists, and then enters the working area of ​​the vortex dust collector. Under the influence of centrifugal force, dust particles from the gas are sent to the walls of the apparatus. And under the influence of gravity, they go down. After that, they fall into a special bunker. In this case, the purified air escapes through the exhaust pipe.

The efficiency of such a dust collector depends on the ratio of the amount of upper Q 2 and lower Q 1 gas flow. In order for the swirl dust collector to work at its maximum efficiency, Q 2 / Q 1 must be in the range from 1.5 to 2.2.

1. Determination of the diameter of the working area. To do this, in the calculations, the speed of the dusty flow is taken as ν g \u003d 5-10 (m / s):

D 1 \u003d √4 G / Π ν g

1. Determining the size of the dust collector depending on its diameter.
2. Calculation of the hydraulic resistance of the vortex dust collector according to the formula:

Δp = (ξ ρ ν g ²) / 2

in which ξ is the coefficient of hydraulic resistance. In this case, the coefficients of resistance of the upper and lower flows must be taken into account.

Dynamic dust collectors. Peculiarities

A feature of dynamic dust collectors is that in such devices the purification of gases from dust occurs not only with the help of centrifugal force, but also due to the Coriolis force, which occurs during the rotation of the impeller. In such dust collectors, in addition to settling particles, the function of a draft device is also performed.

This type of dust collector uses more electricity than a fan with the same pressure and performance. However, this energy consumption is still less than the required consumption for separate operation of the centrifugal dust collector and fan.

The design of the simplest dynamic dust collectors consists of a casing and an impeller. In this case, the impeller drives the raw gas. And under the influence of the Coriolis force and centrifugal force, dust particles are released from the gas.

Dynamic dust collectors are divided into two groups. The devices of the first group operate in such a way that the gas flow with dust is fed to the central part of the wheel, and the dust particles that are separated during the purification process move in the direction of the gas supply. Dust collectors of the second group of dust particles move in the opposite direction to the movement of gas. In this case, the crude gas is sucked into the holes of the drums, which are located on its side surface.

The most popular dynamic dust collectors are dust extractors (see fig.). Such apparatuses are used for initial purification of gases for asphalt concrete plants, linear production. Such dynamic dust collectors are capable of retaining dust particles with a size of at least 15 microns. The impeller on the shaft creates a pressure difference, with the help of which the movement of gases is carried out. And under the influence of centrifugal forces, dust particles are discarded in the periphery, and after that they are removed from the apparatus with a certain amount of gas.