THREE-STAGE DUST COLLECTION SYSTEM Russian patent published in 2018 - IPC B01D46/00 

FIELD: dust collection equipment.

SUBSTANCE: invention relates to the dust-collecting technique and can be used in the chemical, textile, food, light and other industries for the cleaning of dusty gases. Three-stage dust extraction system contains an inertial dust collector as the first stage of preliminary cleaning of the gas-air mixture from dust, in series connected to a second stage represented by a cyclone dust collector in series connected to a third stage of fine cleaning, made in the form of a sleeve filter. Inertial dust collector comprises a housing, inside it containment elements, the introduction of a dusty gas stream, at least one dust collector and a cleaned gas outlet, the axial lines of the barrier elements fixed in the upper part of the body coincide with the axes of the hoppers, and the barrier elements located at the joint of the surfaces forming the bunker part are made in the section in the form of a T-shaped profile. Cyclone body of the second stage of cleaning consists of two coaxial conical parts. In the inlet branch pipe, an axial socket is fixed coaxially to the housing, which has inclined blades. Coaxial to the body in its inner part are installed louvered grilles of cylindrical shape, which are made in the form of successively connected sections of different diameters, with the diameters of the sections increasing, starting from the axial outlet to the outlet nozzle formed as a diffuser, and at the end of the last section of the louvred grilles there is a lateral branch pipe at an angle of 90° to the axis of the cyclone body, which is connected to a storage dust collector, and the outlet pipe is connected by a duct to a filter sleeve of the sleeve filter, which is the third stage of the dust collection system. Sleeve filter inlet is connected to the outlet of the exhaust pipe through the flange for the inlet of the gas to be cleaned into the filter of the sleeve filter having the form of a cabinet with a recess through the side doors of vertically arranged filter elements in the form of filter hoses, the flange for the outlet of the purified gas is located in the cleaned gas chamber located above the filter chamber, and has cross-sectional dimensions equal to the flange for the inlet of the gas to be cleaned into the filter, which is additionally provided with a temperature sensor installed in the housing of the filter section. Mounted inside the dust collection bin is an emergency dust level sensor; mounted inside the filtering section outlet box is an automatic thermal annunciator sensor. Above sensors outputs are connected to the governing controller. In the outlet box of the filter section of the filter there is a collector with injectors for connection to the fire extinguishing system, the control unit of which is connected to the control controller, and the dust collecting bin is conical or pyramidal in shape with an angle of inclination of the walls that exceeds the angle of the natural slope of the trapped dust. Filter regeneration system includes valve units in which electromagnetic valves are mounted whose input is connected to the output of the control controller, impulse valves with impulse pipes and nozzles, Venturi nozzles, a differential pressure meter connected through a pressure sensor to the chamber for the outlet of the purified gas and through a pressure sensor to the filter chamber for the input of the gas to be purified, as well as a set of valves for supplying compressed air to the valve blocks, the differential pressure gauge being connected to the control controller. Nozzle of the fire extinguishing system contains a cylindrical hollow body with a channel for supplying liquid, in which a diffuser consisting of three throttling elements is fixed. Atomizer is made in the form of oppositely arranged vertices and axisymmetric hollow conical swirlers: upper and lower, while the conical shell of the lower swirl is fixed by means of at least three spokes fixed at one end on the conical shell of the lower swirler in its upper part, and on the other end – in the annular groove of the nozzle channel, made on its internal surface. Top of the conic surface of the conical shell of the upper swirl is attached to a circular perforated plate installed in the annular groove of the nozzle channel and supported by the top of the lower swirler fixed in the nozzle channel by means of spokes. Through the external surfaces of the hollow cone swirls, through screw threads are made, and the throttling effect of the atomizer is generally determined by the total throughput of the constituent elements, in order to obtain a finely dispersed spray, the total throughput of the upper swirler and the perforated plate is greater than that of the lower swirler, and a diffuser with a circular perforated plate mounted on its cut is fixed to the lower end surface of the cylindrical hollow body.

EFFECT: technical result is an increase in the efficiency and reliability of the dust collection process, as well as a decrease in the metal intensity and vibro-acoustic activity of the apparatus as a whole.

1 cl, 5 dwg