Samoreguliruyuschaya filter cyclone to remove dust from gases

 

The invention is intended for dry gas cleaning from dust and can be used in chemical, food, construction, pharmaceutical, metallurgical and other industries, as well as the ecological processes of flue gas and air emissions. Filter-cyclone comprises a cylindrical body with a conical bottom, tangentially located fitting for entering into the apparatus of the dusty gas stream and fitting for dust removal, the axis of which is a filter of a porous material with an associated structure with blades having the shape of the bucket is deployed toward the dust-gas flow, while performing the functions fitting for clean gas discharge. The filter has the capability of free rotation under the action of the gas flow acting on the blades are attached to the vertices forming the surface of the filter star-shaped along their entire length, thus fitting to enter the dusty gas stream can be performed over the entire height of the cylindrical part of the housing, on the inner surface of which is fixed a curved grooved plate has a cylindrical shape, and the surface elements of a star rotating filter has a shape in each is rnost material. The technical result is to increase the efficiency of the filter-cyclone, increasing its productivity and the degree of cleaning of dusty gas. 4 C.p. f-crystals, 5 Il.

The invention relates to techniques intended for dry gas cleaning from dust, and can be used in chemical, food, construction, pharmaceutical, metallurgical and other industries, as well as the ecological processes of flue gas and air emissions.

The closest in technical essence and the achieved result is a filter-cyclone comprising a housing with a conical bottom, tangentially located fitting for entering into the apparatus of the dusty gas stream and fitting for dust removal, rotating in a bearing unit due to fixed thereto wind wheel of the exhaust pipe for the exhaust of clean gas, made of porous ceramics, and while performing the filter function [RU (11) 2150988 (13) C1, MPK7 01 D 50/00, 04 9/00].

The disadvantage of this device is the difficulty of achieving the required rotation speed of the exhaust pipe due to the fact that it is driven at the expense attached to it in the e in the cylindrical body immediately distributed over the entire height of the cylindrical body, and naturally, will perform a rotational movement with greater speed in cross section, free from wind wheel. In addition, regeneration of the cylindrical porous surface of the rotating filter is possible only in the case when the centrifugal force acting during the rotation on each element of the mass deposited on the surface of a solid material (sludge), will exceed operating on the same element of the pressure force (pressure differential on the filter surface is the driving force of the filtration process), the forces of adhesion, cohesion and hydraulic resistance of this element mass (sludge).

An object of the invention is to increase the efficiency of the filter and its performance.

The technical problem is achieved in the proposed filter-cyclone containing cylindrical tank with conical bottom, tangentially located fitting for entering into the apparatus of the dusty gas stream and fitting for dust removal, the axis of which is a filter of a porous material with an associated structure, and the blades having the shape of a ladle that is deployed toward the dust-gas flow, while performing the functions fitting for clean gas discharge, according to the invention is kreplenie to the vertices forming the surface of the filter star-shaped along their entire length, when this fitting to enter the dusty gas stream can be performed over the entire height of the cylindrical part of the housing, on the inner surface of which is fixed a curved grooved plate has a cylindrical shape, and the surface elements of a star rotating filter may take the form, at each point where the angle between tangent and radius equal to the angle of repose deposited on the surface of the material.

The technical result is to increase the efficiency of the filter-cyclone, increasing its productivity and the degree of cleaning of dusty gas.

In Fig.1 shows a General view Samaraenergo filter-cyclone of Fig. 2 shows the blades of the star-shaped filter (section a-a) of Fig.3 - scan the inner surface of the cylindrical part of the cyclone body mounted on it curved grooved plates of cylindrical shape, and Fig.4 slit plate fixed to the inner surface of the cylindrical part of the housing of Fig.5 is a fragment of the surface of the star-shaped element rotating filter.

Samoreguliruyuschaya filter cyclone includes a vertical cylindrical housing 1 with a conical bottom material with an associated structure with 4 blades 5, having the form of a bucket that is deployed toward the powder-gas stream, attached to the vertices forming the surface of the filter, while performing the functions fitting for clean gas discharge, the axis of which is fixed in the bearing units 6 on the ends of the filter and the upper hollow axle is a continuation fitting for draining purified gas 7, socket 8 for input into the apparatus of the dusty gas stream positioned tangentially to the housing, the cover 9 with the connecting fitting 10. When performing fitting for entering dust-Laden gas flow over the entire height of the cylindrical part of the body on the inner surface of the fixed curved grooved plate has a cylindrical shape 11.

Filter-cyclone operates as follows.

Powder-gas flow through the fitting 8 fixed tangentially to the housing 1 filter-cyclone, enters the apparatus and is rotated with a certain peripheral speed acting on the blades 5 attached to the vertices that form the surface of a star filter 4. Due to the kinetic component of the specific mechanical energy of the gas stream, the filter starts to rotate around its axis in bearing assemblies 6, and the rotation speed of the filter is equal to Okruzhnaya rotating dust and gas flow, that makes it possible to increase the peripheral speed at the same performance on a dusty gas and leads to an increase of the centrifugal force acting on the dust particles. In addition, the rotation of the filter increases the radial component of the velocity of dust particles [Romankov, P., M. Kurochkin I. hydro-mechanical processes of chemical technology. - 3rd ed., Rev. - L. : Chemistry, 1982. - 288 S., ill., S. 161]. Dust particles, rotating together with the dust and gas flow under the action of centrifugal force and the radial velocity component of a moving simultaneously to the inside of the cyclone and, reaching it, spiral for friction forces on the wall down in the conical part 2 to the fitting 3. During execution of stutzer to enter the dusty gas flow over the entire height of the cylindrical part of the body on its inner surface is fixed curved grooved plate 11 has a cylindrical shape made of a material with a low level of adhesion with respect to the solid (dispersed) phase of dust and gas flow (e.g., PTFE). Solid particles that have reached the wall of the body almost immediately get into the groove of the plate 11 and under the action of axial velocity component of a fall on the surface of the plate to zylindrischen to the filter inside the gas flow, freed from the main mass of solid dust particles, passes through the porous side surface of a star filter and simultaneously released from the smallest dust particles, the size of which is determined by the structure of porous filter material. Dust particles deposited on the filter surface and form a layer of sediment, and the cleaned gas stream from the internal cavity of the filter on the upper hollow shaft 7 and the nozzle 10 is removed from the apparatus. With increasing thickness of the sediment layer of solid material on the surface of the rotating filter increases the centrifugal force acting on each element (the unit square) mass of sediment. When reaching a certain value, it will be more of the radial component of the pressure force acting normal to the side surface of the star filter (not coinciding with the direction of the centrifugal force and the friction force element mass on the filter surface, which will lead to disruption of sediment from the surface of the filter, i.e. its regeneration. This process will occur continuously and be done with less thickness (mass element) sediment layer on the side surface of star-shaped filter in comparison with the cylindrical surface of the rotating filtrate elements of star-shaped filter will have the form, at each point where the angle between tangent and radius equal to the angle of repose deposited on the surface of the material. Reducing the thickness of the sediment leads to a reduction of the hydraulic resistance of the filter, and, consequently, to increase the efficiency of the filter-cyclone (increased productivity and degree of cleaning, the reduction of energy consumption in the process).

The use of the proposed filter-cyclone allows: - to ensure the high efficiency of the allocation of dust and gas flow of solid particles both large and small fractions; - to increase the initial concentration of dust; - to ensure the continuous operation of the filter due to the regeneration of its surface without stop filter; - to reduce the resistance of the filtering process, and consequently, improve the performance of the device and to reduce energy consumption of the process; - to increase the surface area of the filter; - improve treatment quality and reliability, to maintain the compactness of the device and ease of manufacture; - to optimize the process of regeneration of the filter by the flow of dust-Laden gas in the apparatus.

Claims

1. Filter-cyclone, containing a cylindrical thread and fitting for dust removal axis of the body is a filter of a porous material with an associated structure with blades, while performing the functions fitting for draining cleaned gas, characterized in that the filter has the capability of free rotation under the action of the gas flow acting on the blades are attached to the vertices forming the surface of the filter star-shaped along their entire length.

2. Filter-cyclone under item 1, characterized in that the fitting for entering dust-Laden gas stream is performed over the entire height of the cylindrical part of the body.

3. Filter-cyclone under item 1, characterized in that the surface elements of a star rotating filter has the shape at each point of which the angle between a tangent and a radius equal to the angle of repose deposited on the surface of the material.

4. Filter-cyclone under item 1, characterized in that on the inner surface of the cylindrical part of the body fixed curved grooved plate has a cylindrical shape.

5. Filter-cyclone under item 1, characterized in that the blades have the shape of the bucket is deployed toward the dust-gas flow.

 

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