RU2342183C1 - Bag filter with regeneration system - Google Patents

Abstract

FIELD: technological processes.

SUBSTANCE: filter contains single casing with cover, in which unit of filters is installed with filtering elements of bag type and system of filtering elements regeneration arranged in the form of shaking frame with vibrator. Filter is additionally equipped with boxes for inlet of contaminated air into installation and outlet of clean air from installation, and also bunker feeder with device for continuous discharge of wastes, which contains bunker, lock and auger discharge mechanism. Temperature detector is installed in filter casing, emergency detector of dust level is provided in bunker for dust collection, thermal automatic detector-annunciator is available in outlet box of filtering section, at that outlets of detectors are connected to common microprocessor. In outlet box of filtering section collector with nozzles is also installed for connection to fire-fighting system, control unit of which is connected by electronic connection to common microprocessor.

EFFECT: higher efficiency and reliability of dust collecting process with reduction of metal intensity and vibroacoustic activity of device as a whole.

2 cl, 3 dwg

Description

The invention relates to techniques for dust collection and can be used in chemical, textile, food, light and other industries for cleaning dusty gases, and is intended for central aspiration systems.

The closest technical solution to the claimed object is a filter containing a housing with a lid, a filter section, a hopper, inlet and outlet pipes, a regeneration system and a regeneration control unit, known from the book: Morgulis M.L. etc. Bag filters. Moscow, Engineering, 1977, p.104 - (prototype).

The disadvantage of the prototype is the relatively low efficiency of the dust collection process due to the small area of the filter element.

The technical result is an increase in the efficiency and reliability of the dust collection process, as well as a decrease in the metal consumption and vibroacoustic activity of the apparatus as a whole.

This is achieved by the fact that in a bag filter with a regeneration system containing a single housing with a cover, in which a filter block with filter elements of a bag type is placed, a box for the entry of contaminated air into the unit and a box for the outlet of clean air from the unit, a hopper with a continuous device waste discharge containing a hopper, a lock, a screw discharge mechanism, a regeneration system of filter elements, made in the form of a shaking frame with a vibrator, a temperature sensor is installed in the housing, in the hopper for dust collection - an emergency dust level sensor, in the outlet box of the filter section - a thermal automatic detector detector, the outputs of which are connected to a common microprocessor located in the control cabinet, and a collector with nozzles for connecting to the fire extinguishing system is installed in the outlet box of the filter section, the control unit of which is electronically connected to a common microprocessor, a bag filter regeneration system with a pulse purge mechanism or a vibro-shake mechanism is installed in the housing Ia, wherein the control unit is also connected electronic communication with a common microprocessor, disposed in the cabinet.

Figure 1 shows the frontal projection of the filter bag, figure 2 - its profile projection, figure 3 is a functional diagram of fire and explosion safety of the device.

A bag filter with a regeneration system contains a single housing with a cover 7, in which a filter unit 3 (Figs. 1-2) with filter elements 6 of a bag type, a box 10 for entering contaminated air into the unit, and a box 11 for leaving clean air from the unit, a bunker drive with a continuous waste discharge device, comprising a hopper 2, a lock 4, a screw discharge mechanism 1, a bag-type filter element 6 regeneration system made in the form of a shaking frame 5 with a vibrator (not shown in the drawing), as well as a ladder 9 and pl schadku 8 for filter maintenance. The unloading device can be of two types: unloading based on a screw conveyor and unloading based on a chain conveyor.

To optimize the dust collection process and for its safe operation, a temperature sensor 20 is installed in the filter unit 3, an emergency dust level sensor 13 is installed in the dust collection bin, and a thermal automatic detector-detector 12 is installed in the duct 11 for clean air outlet (Fig. 3), the outputs from which are connected to a common microprocessor 14. In the box 11, a collector 15 with nozzles 16 is installed for connection to a fire extinguishing system, the control unit 17 of which is connected to a common microprocessor 14. A regeneration system 18 is also installed in the housing bag filters with a pulse blowing mechanism (not shown in the drawing) or vibration shaking mechanism, the control unit 19 of which is also electronically coupled to a common microprocessor 14 located in the cabinet 21.

A heat detector-detector 12 and a collector 15 with nozzles 16 of the fire extinguishing system are installed in the output box 11 of the filter in order to prevent the spread of flame in case of fire further along the ventilation ducts, which improves the reliability and safety of the entire complex containing this device.

The collector 15 with nozzles 16 operates on the principle of opening an emergency electromagnetic water supply valve when a control signal is supplied to the valve from a common microprocessor 14, which processes the signal from a heat detector 12, which in turn responds to an increase in temperature in the outlet box, up to self-ignition dust aerosols and filter materials.

The operation of the powder fire extinguishing system occurs in a duplicate version, if, for example, the water supply solenoid valve fails or the water supply system is disconnected, then the powder fire extinguishing system will work, and the operation of these systems will be controlled from the microprocessor 14 so that in the event of an accident, it was possible to control the fire extinguishing process, while stopping the spread of fire, which as a whole would increase the safety of the entire dust cleaning air system.

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, chlorin, oxalone, polypropylene, polyvinyl chloride , ftoroplast, teflon, etc., artificial inorganic fibers, for example glass fiber.

The filter works as follows.

The raw gas enters the box 10 for the entry of contaminated air, then into the filter unit 3 with filter elements 6 bag type. Dust is deposited on the inner surface of the sleeves and periodically discharged from them by a system of regeneration of filter elements, made in the form of a frame 5 vibration shaking with a vibrator. Dust is poured into the hopper 2, from where through the airlock 4 through the auger discharge mechanism 1 is removed from the filter. A ladder 9 and platform 8 are provided for filter maintenance. The unloading device can be of two types: unloading on the basis of a screw conveyor and unloading on the basis of a chain conveyor. The installation is completed 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 filter elements are simultaneously an aerodynamic silencer of active (sorption) type noise. Dust collectors of this type are designed for central aspiration systems.

Claims (2)

1. A bag filter with a regeneration system, comprising a single housing with a cover, in which a filter block with filter elements of a bag type and a regeneration system of filter elements made in the form of a shaking frame with a vibrator are located, characterized in that the filter further comprises a box for the entry of polluted air into the installation and the box for the release of clean air from the installation, a bunker drive with a device for continuous discharge of waste containing a hopper, a lock and auger discharge mechanism, and in the housing The temperature sensor has been updated, in the dust collection hopper there is an emergency dust level sensor, in the output box of the filter section is a heat automatic sensor-detector, the sensor outputs are connected to a common microprocessor located in the control cabinet, and a collector with nozzles is also installed in the output box of the filter section connection to a fire extinguishing system, the control unit of which is electronically connected to a common microprocessor, and a bag filter regeneration system with a pulse mechanism is installed in the housing or by a shaking mechanism, the control unit of which is also electronically connected to a common microprocessor located in the cabinet. 2. The bag filter according to claim 1, characterized in that the dust collection hopper is conical or pyramidal with an angle of inclination of the walls greater than the angle of repose of the collected dust, and in the filter unit, the filter elements of the bag type are arranged in straight rows or in a checkerboard pattern, moreover, the ratio of the length of the sleeve L to its diameter D is in the optimal range of values: L / D = 15 - 40, and as the material of the filtering sleeve elements are used as woven materials with weaving methods: linen, twill, satin marketing; 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, chlorin, oxalone, polypropylene, polyvinyl chloride, fluoroplastic, teflon, artificial inorganic fibers, for example, glass fiber.

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