SU385601A1 - DEVICE FOR CLEANING OF EXHAUST GASES - Google Patents

Description

one

The invention relates to a technique for cleaning gas from suspended dust particles.

A device for cleaning waste gases is known, including a venturi with a feed duct. However, in the known device there may be cases of uneven distribution of dust particles over the cross section of the washer, which is especially observed when the flue duct supplying the dusty flow to the Venturi pipe has a turn. In this case, the dust is displaced to the pipe wall, and the conditions for its capture by drops of sprayed water deteriorate. The capture efficiency is reduced.

In addition to this, gas cleaning with high dustiness increases wear on the neck of the Venturi tube, a lot of sludge is formed, which reduces the reliability of the device. The use in this case of the preliminary cleaning stage (cyclones, louvered dust collectors, etc., installed separately from the gas scrubber) increases the dimensions, intensity and hydraulic resistance of the installation.

In order to increase the dust collection efficiency in the proposed device, the feed duct is made in the form of a cochlea, along the axis of which a radial guide device is installed at the entrance to the Venturi tube. In addition to the TOGO, the snail on the periphery is provided with a dust removal slot, connected by a nozzle with an external cyclone, the exhaust pipe of which

communicated with the cochlea and placed coaxially with the guide vane. This ensures the preliminary separation of coarse dust.

The drawing shows the described device with a cut along aa.

The device contains a cochlea (dust collector) / installed above the Venturi tube 2, in the upper part of which there is a radial guide vane 3 with curved blades 4. The cochlea has a slit 5 for removing the collected dust from the cyclone 6.

The device works as follows.

The dusty gas stream enters the inlet section of the Venturi tube - the cochlea / and acquires a curvilinear motion. Dust particles under the influence of inertial forces are thrown to the periphery of the cochlea and, together with a small part of the gas (6-8%) through the slit 5, exit into the external cyclone 6 for final separation. Gas recirculation through a cyclone occurs due to the pressure difference between the periphery of the cochlea and its center. Gas with reduced silencing flows from the cochlea into the venturi tube through the radial guide vanes 3 with curvilinear blades 4. With the aid of the guide vanes, the flow is straightened and an increase in the dust concentration along the axis of the venturi is achieved. At the same time, dust particles located in the central zone of the Venturi pipe fall into more favorable

the conditions of contact with the sprayed water, where there is the greatest density of irrigation (water supply for irrigation of the Venturi pipe in this case occurs through nozzles located but at the periphery of the neck), thereby increasing the efficiency of coagulation. The coagulant dust, together with the water drops after the Venturi tube, enters the drip tray for final capture.

Subject invention

Claims (2)

1. A device for cleaning waste; their gases, including a Venturi pipe with a connection w, a duct, characterized in that, in order to increase the efficiency of dust collection, the inlet duct is made in the form of a cochlea, along the axis of which a radial nanovrachiv apparatus is installed at the entrance to the Venturi tube. 2. A device according to claim 1, characterized in that, for the purpose of preliminary separation of coarse dust, the cochlea on the periphery is provided with a dust removal slot connected by a branch pipe with an external cyclone, the exhaust pipe of which communicates with the cochlea and is placed coaxially with the guide vane.