RU2150988C1 - Cyclone-filter for cleaning dust-laden gases - Google Patents

Abstract

FIELD: chemical, food, and metal-working industries. SUBSTANCE: cyclone- filter has case with conical bottom, tangential pipe union for admitting dust-laden gas flow, dust outlet pipe union, exhaust pipe, and filter. Exhaust pipe functions as filter and at the same time as clean gas outlet pipe union; it is, essentially, welded structure partially made of porous cermet that rotates in bearing assembly by means of its windwheel thereby affording additional gas filtering by passing it through side surface and bottom end. Proposed device ensures continuous reconditioning of exhaust-pipe filtering surface, effective separation of gas-dust systems due to increasing radial component of dust particle speed, rather low resistance due to relatively large filtering surface area, reduced space requirement due to using working volume of cyclone for dust-laden gas treatment. EFFECT: facilitated manufacture, improved reliability. 3 dwg

Description

 The invention relates to techniques for cleaning dusty gases and can be used in the chemical, food and metallurgical industries.

 Known filter cyclone FCGN, the closest in technical essence and the achieved effect, in which a dusty gas stream passes two stages of purification. A cyclone is used as the first stage for preliminary separation of large dust particles, and as a second, a separately located filter, in which bulk granular layers act as a filter material.

 The disadvantage of this design of the filter cyclone is the high frequency of regeneration due to a significant increase in the hydraulic resistance of bulk granular layers, the appearance of a significant breakthrough of dust particles through the filter layer for a sufficiently small interval of operation time, relative structural complexity, large overall dimensions [Mazus M. G., Malgin A.D., Morgulis M.L. Filters for trapping industrial dust. - M.: Engineering, 1985. - 240 p., Ill.].

 The objective of the invention is to increase the efficiency of the cyclone filter.

 The technical problem is solved in that in the proposed cyclone filter, the exhaust pipe simultaneously serves as a filter and a fitting for the removal of purified gas and is a welded structure, partially made of porous cermet and rotating in the bearing unit due to the mounted wind wheel, providing additional cleaning gas by filtering it through the side surface and the bottom end.

 The technical result is to increase the efficiency of the cyclone filter.

 In FIG. 1 shows a general view of a cyclone filter; in FIG. 2 shows the blades of a wind wheel (section along AA); in FIG. 3 - remote element I (bearing assembly).

 The cyclone filter includes a vertical cylindrical housing 1 with a conical bottom 2 provided with a nozzle 3 for removing dust, a rotating exhaust pipe, which is a filter element made of porous cermet 4, and a nozzle for removing purified gas 5, a wind wheel fixed in the bearing unit 6 7, a fitting 8 for supplying a dusty gas stream to the apparatus located tangentially to the housing, a cover 9 with a connecting fitting 10.

 The cyclone filter works as follows.

 The dust and gas stream through the nozzle 8, which is installed tangentially to the cyclone filter housing 1, enters the apparatus and, due to its specific mechanical energy, drives the exhaust pipe into rotation through the wind wheel 7. The dusty gas stream flows around the circumference around the exhaust pipe 4 and spirals downward, ensuring the separation of large particles of the dispersed phase from the dispersion medium (gas), and is simultaneously filtered through a porous side surface and the lower end of the exhaust pipe. The rotation of the exhaust pipe provides continuous regeneration of its filtering surface and an increase in the radial component of the velocity of dust particles, which increases the efficiency of the cyclone filter [Romanov PG, Kurochkina MI Hydromechanical processes of chemical technology. - 3rd ed., Revised. - L .: Chemistry, 1982. - 288 p., Ill., P. 161].

The proposed cyclone filter provides:
- continuous regeneration of the filter surface of the exhaust pipe;
- increasing the efficiency of the separation process of dust and gas systems by increasing the radial component of the velocity of the dust particles;
- a sufficiently low resistance due to the relatively large filtering surface;
- the compactness of the apparatus as a result of using the working volume of the cyclone for cyclonation and filtering of dusty gas;
- ease of manufacture and reliability.

Claims (1)

 A cyclone filter, including a housing with a conical bottom, a tangentially located fitting for introducing a dusty gas stream into the apparatus and a fitting for removing dust, an exhaust pipe and a filter, characterized in that the exhaust pipe simultaneously functions as a filter and a fitting for removing purified gas and represents a welded structure partially made of porous cermets and rotating in the bearing assembly due to the wind wheel mounted on it.

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