RU1796841C - Dust-moisture-containing air removal installation - Google Patents

Abstract

SUMMARY OF THE INVENTION: the suction openings of the casing are blocked by an aspiration funnel, to which a exhaust duct with a dust separator and a fan with an exhaust pipe are connected. The hot air manifold is connected to the funnel. The collector is made in the form of an annular pipeline mounted coaxially to the funnel, and is equipped with nozzles located between the pipeline and the funnel and tangentially attached to the funnel. The annular pipe and the exhaust pipe are interconnected by a bypass duct. 1 s P. f-ly, 2 ill.

Description

The invention relates to a ventilation technique and can be used to remove dust and moisture-containing air from its places of emission.

A known installation for removing dust and moisture containing air, comprising a casing with a suction opening blocked by an aspiration funnel, connected to the last exhaust duct with a dust separator and a fan with an exhaust pipe and a hot air manifold.

The disadvantages of this installation are the high energy costs associated with heating the supply air supplied to the suction funnel and the subsequent release of heat into the atmosphere along with the exhaust air. In addition, the hot air supply system by means of supply air ducts diametrically opposed to the walls of the suction funnel does not efficiently mix hot air with dust-containing air, which requires an increase in the temperature of the hot air supplied to the suction funnel, and, as consequence of increased energy costs.

The aim of the invention is to reduce energy consumption.

The goal is achieved in that the hot air collector is made in the form of an annular pipe installed coaxially with an aspiration funnel, and is equipped with nozzles located between the pipe and the suction funnel and tangentially attached to the latter. In this case, the annular pipe and the exhaust pipe are interconnected by a bypass duct.

In FIG. 1 shows the proposed installation, General view; in FIG. 2 - section aa; in FIG. 1.;

The installation includes a casing 1 with a suction opening 2, an aspiration funnel 3. an exhaust duct 4 connected to it with a dust separator 5 and a fan 6. a bypass duct 7 connecting the exhaust pipe 8 of the fan 6 with the collector 9 of hot air inside which is equipped with an electric air heater 10. Collector 9 of hot air

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(Fig. 2) is made in the form of an annular conduit mounted coaxially with an aeration funnel 3, and is equipped with nozzles 11. located between the annular conduit and an aspiration funnel 3 and tangentially attached to the latter. An air damper 12 is installed to adjust the flow rate of recirculated air in the bypass duct 7.

Installation works as follows.

Under the influence of the vacuum created by fan 6, dust-containing air with a relative humidity of 100% is removed from the casing 1 and through the suction hole 2 it enters an aspiration funnel 3, and then through the exhaust duct 4 it enters the dust separator 5, where the air is cleaned of dust. Part of the air purified in the dust separator 5 is discharged by the fan 6 through the exhaust pipe 8 into the atmosphere, and another part, due to the pressure difference in the exhaust pipe 8 and the suction funnel 3, is returned to recirculation through the bypass duct 7. Using the air damper 12 installed in the bypass air duct 7. the recirculation air flow rate is adjusted at which the temperature of the air mixture in the suction funnel 3, measured by a thermometer (not shown) 7, should be 5-10 rC higher than the dew point temperature. This setting eliminates the need for additional supply air, which reduces the heat consumption for heating the air in the collector 9 of hot air and the energy consumption consumed by the fan motor from the network. From the bypass duct 7, the recirculated air enters the hot air collector 9, where the air is additionally heated in the heater 10 and then through the nozzles 11 the hot air enters the suction funnel 3. Thanks to the coaxial placement of the suction funnel 3 and the collector 9 s

nozzles 11 located between the collector 9 and the suction funnel 3 and tangentially attached to the latter, aerodynamic twisting (swirl) in the suction

funnel 3 of dust-containing air clockwise under the action of jets of hot air emerging from the nozzles 11 at a high speed, which enhances heat transfer and accelerates the process of mixing it with

hot air and thereby increases the uniformity of temperature and relative humidity of the resulting aerosol. Further, from the suction funnel 3, an aerosol mixture having a new thermophysical state as compared with dust and moisture-containing air, at which the temperature is higher than the dew point temperature, enters the dust separator 5 through the exhaust duct 4 where dust is deposited. The precipitated dust is discharged from the dust separator 5 to the outside, and the warm, cleaned air by the fan b through the exhaust pipe 8 is discharged into the atmosphere and is partially recycled to the bypass duct 7 and then to the hot air manifold 9, and the cycle is repeated.

The use of the proposed installation will reduce the energy consumption spent on removing dust-containing air (ventilation) by enhancing heat transfer, speeding up the process of mixing dust-containing air with hot air in the suction funnel, and using (utilizing) the heat of purified recirculated air.

Claims (2)

The formula is invented and 1. An apparatus for removing dust and moisture containing air, comprising a casing with a suction opening blocked by an aspiration funnel, connected to a final exhaust duct with a dust separator and a fan with an exhaust pipe, and a hot air manifold connected to an aspiration funnel characterized in that, in order to reduce energy consumption, the hot collector air is made in the form of an annular pipeline installed coaxially with an aspiration funnel, and is equipped with nozzles located between the pipeline and the funnel and tangentially attached to the latter. 2. Installation according to claim 1, with the exception that the annular pipe and the exhaust pipe are interconnected by a bypass duct.