RU2305600C1 - Dust trapping installation provided with vibration cyclone - Google Patents

Abstract

FIELD: dust trapping processes and equipment.

SUBSTANCE: dust trapping installation includes inlet branch pipe and outlet branch pipe, screw like lid, exhaust pipe, cylindrical and cone portions. Ring is mounted on cylindrical portion for supporting vibration exciter with control unit. The whole cyclone is suspended by means of springs with use of beam joined with outlet branch pipe. Filter is in the form of hose filter with regeneration system.

EFFECT: enhanced efficiency of dust trapping.

2 cl, 1 dwg

Description

The invention relates to techniques for dust collection and can be used in chemical, textile, food, light and other industries for the purification of dusty gases.

The closest technical solution to the claimed object is a dust collection unit according to SU No. 1576458, containing a filter and a cyclone connected to each other by a duct so that the outlet of the cyclone is connected to the inlet of the filter, and the cyclone contains a cylindrical and conical part of the housing, inlet and outlet pipes, exhaust the pipe, and the filter contains a housing with a lid, a filter section, a hopper, inlet and outlet pipes, a pulse regeneration system and a regeneration control unit (prototype).

The disadvantage of the prototype is the relatively low efficiency of dust collection due to the partial return of fine dust to the axial nozzle.

The technical result is an increase in the efficiency of dust collection.

This is achieved by the fact that in a dust collecting unit consisting of a pre-filter and a thin filter interconnected by an air duct so that the outlet of the pre-filter is connected to the input of a thin filter, the pre-filter contains an inlet and an outlet, a screw-shaped cover, an exhaust pipe, a cylindrical part of the housing , the conical part of the body, and on the cylindrical part of the body is fixed a ring on which a vibrator with a control unit is mounted, and the entire cyclone is hung on the springs using a ba ki connected with an outlet, and a fine filter is designed as a bag filter from the regeneration system.

The drawing shows a General view of the dust collector.

The dust collection unit consists of a cyclone 5 and a thin filter 17, interconnected by an air duct 7 with elastic elements in such a way that the cyclone outlet is connected to the inlet of the thin filter 13. The cyclone contains an inlet pipe 1 and an outlet pipe 2, a screw-shaped cover 3, an exhaust pipe 4, a cylindrical part of the housing 5, a conical part 6. A ring 8 is mounted on the cylindrical part 5 of the housing, on which a vibrator 10 with a control unit 11 is mounted. The cyclone is hung on the springs 9 using a beam connected to the outlet pipe 2.

The thin filter 17 is designed as a bag filter with a regeneration system and contains a single housing with a roof, in which a filter block 14 with filter elements 15 of a bag type is placed, a box 13 for entering contaminated air into the unit and a box 16 for leaving clean air from the unit, a hopper storage 12 with a device for continuous discharge of waste, containing a hopper, a lock, a screw discharge mechanism, a regeneration system of filter elements 18 of a sleeve type, made in the form of a shaking frame with a vibrator, as well as a ladder 19 and a flat ku for filter maintenance. The unloading device can be of two types: unloading based on a screw conveyor and unloading based on a chain conveyor. The installation is completed with a control cabinet and a remote control panel for the unloading system and the water supply system in case of fire and a backup powder fire extinguishing system (not shown in the drawing).

A temperature sensor is installed in the filter block housing, an emergency dust level sensor in the dust collection bin, a thermal automatic detector detector in the output box, the outputs of which are connected to a common microprocessor located in the control cabinet (not shown in the drawing), and in the output a box has a collector with nozzles for connection to a fire extinguishing system, the control unit of which is connected to a common microprocessor, and the bag filter regeneration system contains a control unit that is electronically connected to microprocessor, and a remote control panel for the unloading system and the water supply system in case of fire and a backup powder fire extinguishing system (not shown in the drawing).

Housing and fencing parts are made of structural composite or polymeric materials, such as polyethylene, kapron, polyurethane by casting, stamping, welding, molding, and on the surface of the fencing parts a layer of soft vibration-damping material is applied, for example, type of mastic “VD-17” or “ Gerlen-D ”, and the ratio between the thickness of the material and the vibration damping coating is in the optimal range of values: 1 / (2.5 ... 4), and a layer of sound-absorbing material is fixed over the vibration damping layer la, for example the type "vinipor", "akmigran" with acoustically transparent protective film of the type "poviden".

The dust collection bin is made in a conical or pyramidal shape with an angle of inclination of the walls exceeding the angle of repose of the captured dust, and in the filter unit the filter elements of the bag-type are arranged in straight rows or in a checkerboard pattern, with the ratio of the length of the sleeve L to its diameter D being in the optimal range values: L / D = 15 ... 40, and as the material of filtering hose elements are used as woven materials with weaving methods: linen, twill, satin; with the types of fibers in the thread: staple, filament, textured; with surface treatment: smooth and brushed, and non-woven with methods of fixing fibers: needle-punched, canvas-stitched and glued, obtained by the above methods from: natural fibers of animal and vegetable origin, artificial organic fibers (lavsan, nitron, nylon, chlorine, oxalone, polypropylene, polyvinyl chloride, fluoroplastic, teflon, etc.), artificial inorganic fibers (for example, glass fiber).

Dust collector works as follows.

The dusty gas stream is supplied to the installation through the pipe 1, is twisted by a tangential peripheral input and a screw-shaped cover 3. Then it is directed along a downward spiral line along the walls of the apparatus. As a result, dust particles under the action of centrifugal force move from the center of the apparatus to the periphery and, reaching the walls of the apparatus, are transported down to the conical part 6 of the housing to collect the captured dust. The purified air is discharged from the cyclone through the outlet 2. To accelerate the deposition of dust particles, they are vibrotransported by informing the hull parts of the cyclone of the vibration with the specified parameters using a vibrator 10 mounted on the ring 8. The parameters of the emerging vibrodynamic mode are controlled by the control unit 11. At the same time light, finely dispersed fractions of dust particles not trapped in the conical part of the housing are retained on a thin filter 17 connected to it by an elastic air duct m 7.

After preliminary cleaning in the cyclone 5, the gas enters the box 13 for entering the contaminated air of the thin filter 17, then into the filter unit 14 with filter elements 15 bag type. Dust is deposited on the inner surface of the sleeves and periodically discharged from them by the regeneration system 18 of the filter elements, made in the form of a shaking frame with a vibrator. Dust is poured into the hopper 12, from where through the airlock by means of a screw discharge mechanism is removed from the filter. For filter maintenance, a ladder 19 and a platform are provided. The unloading device can be of two types: unloading based on a screw conveyor and unloading based on a chain conveyor. The unit is equipped with a control cabinet with a microprocessor controlled by regeneration, unloading and fire fighting systems. The specific gas load on the filter is selected taking into account the physicochemical properties of the dust and gas stream for each specific process.

In the apparatus there is a decrease in vibro-acoustic energy, since the filtering elements are simultaneously an aerodynamic silencer of active (sorption) type noise. Dust collectors of this type are designed for central aspiration systems.

The hydraulic resistance of the filter element is 15 ... 25% of the hydraulic resistance of the entire apparatus, and the material of the filter element has increased sound absorbing properties.

Claims (2)

1. Installation dust collecting, containing a filter and a cyclone, interconnected by a duct so that the outlet of the cyclone is connected to the inlet of the filter, characterized in that the cyclone contains an inlet and an outlet, a screw-shaped cover, an exhaust pipe, a cylindrical part of the housing, a conical part of the housing moreover, a ring is mounted on the cylindrical part of the housing, on which a vibrator with a control unit is mounted, and the entire cyclone is hung on the springs using a beam connected to the outlet pipe, and the filter is made in e bag filter with a regeneration system containing a single housing with a roof, in which a filter block with filter elements of the bag type, a box for entering contaminated air and a box for leaving clean air, a hopper drive with a continuous dust discharge device containing a hopper, airlock, auger the unloading mechanism, the regeneration system of the filter elements is made in the form of a shaking frame with a vibrator, and a temperature sensor is installed in the housing of the filter unit, an emergency ur sensor is installed in the dust collection bin dust, in the output box - a thermal automatic detector detector, the outputs of which are connected to a common microprocessor located in the control cabinet, and in the output box there is a collector with nozzles for connecting to a fire extinguishing system, the control unit of which is connected to a common microprocessor, and the regeneration system bag filters contains a control unit, which is connected electronically with a common microprocessor and a remote control panel for the discharge system. 2. The dust collecting apparatus according to claim 1, characterized in that the fine filter dust collecting hopper is made conical or pyramidal with an angle of inclination of the walls exceeding the angle of repose of the captured dust, and in the filter block filter elements of the bag-type are arranged in straight rows or in a checkerboard pattern order, and the ratio of the length of the sleeve L to its diameter D is in the optimal range of L / D = 15-40, and as the material of the filtering sleeve elements are used as woven materials with weaving methods : linen, twill, satin, with the types of fibers in the thread: staple, filament, textured, surface treatment: smooth and nap and non-woven with methods for fixing the fibers: needle-punched, canvas-stitched and glued, obtained by the above methods from natural fibers of animal and vegetable origin, artificial organic fibers: lavsan, nitron, nylon, chlorin, oxalon, polypropylene, polyvinyl chloride, fluoroplastic, teflon, artificial inorganic fibers.