SU1418546A1 - Apparatus for cleaning ventilation effluents - Google Patents

Description

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The invention relates to ventilation emission cleaners J1 can be used in any industry having a varnish. kpaco4Hoe production.

The purpose of the invention is to increase the efficiency of the device, ensure compactness and reduce material-intensiveness, as well as leveling the roton at the entrance to the heat exchanger. FIG. 1 shows a device for cleaning ventilation emissions; FIG. 2 - the effect of the angle of inclination of the grating on the coefficient of irregularity | flow.

: The device consists of an insulating-1st casing 1, in the lower part of which there is a combustion chamber 2. On one side of it there is a burner 3 and a branch pipe for supplying ventilation outlets 4, with the axis of the branch pipe and the burners intersecting on the opposite side of the furnace chambers 2. Above the combustion chamber 2, an afterburner is installed on chamber 5 with two perforated catalytic elements 6, made in the form of two tetrahedral prisms inclined towards each other, which are in contact with the upper faces between them. Above the afterburner is a heat exchanger 7 with three air ducts 8-10. The air duct 9 has a pipe branch 11 for supplying part of the ventilation ducts to the burner 3. Between the heat exchanger 7 and the catalytic elements 6, a distribution grid 12 is installed, made in the form of a perforated V-shaped plate with an apex of 120-140 °, the limits of the living the perforation sections are 20–40% and petals 13 bent from each hole at an angle of 90, while the petals are bent from the top of the distribution grid.

The device works as follows.

The vent emissions go through the duct 8 into the heat exchanger 7 where they are heated by the heat of the cleaned gases and through the duct 9 and the nozzle 4 enter the mixing zone of the vent emissions with the burner 3 gases. Part of the vent emissions through the branch pipe 11 enters the burner 3. Heating After reaching a certain temperature, the vents are passed through the air intake.

the surface of the catalytic element 6 through the catalyst, where the process of flameless oxidation of vent emissions takes place. Further, the cleaning gas passes through the distribution grid 12, which ensures the alignment of the air flow at the entrance to the heat exchanger 7. The cleaned gas passing through the heat exchanger 7 transfers part of the heat to the vent emissions and is discharged through the air duct 10 from the installation.

The supply of the device with a distributor plate allows the air flow to be evenly distributed at the inlet to the heat exchanger with the minimum distance between the afterburning chamber and the heat exchanger. Experimental studies have shown that the uniformity of air flow through the heat exchanger with small hydraulic losses on the distribution grid is achieved by calculating two parameters of the angle of inclination of the grid and the live section of the perforation.

The angle of inclination of the lattice (Fig. 2) is determined by the limits 120-140 °. Outside these angles, the coefficient of uneven air flow begins to increase sharply, determined by the ratio

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The coefficient of uneven air flow at angles of 120-140 ° will be no more than 10%, and hydraulic losses of 10-15 Pa.

The living section of the perforation is determined by the limits of 0.2-0.4. With, 2 the hydraulic losses on the distribution grid up to 50 Pa dramatically increase, with, 5 the grid exerts a small shading to the flow and the unevenness of the air flow reaches 25% or more. Petals are needed to change the direction of flow before entering the heat exchanger.

Installing a distribution grid directly between the heat exchanger and the catalytic element ensures uniform air flow and reduces installation volume, as well as reduces thermal

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Claims (2)

1 . ^ DEVICE FOR CLEANING VENTILATION EMISSIONS, containing a combustion chamber with a burner and a nozzle for supplying ventilation emissions located on one side, and a pipe for supplying ventilation emissions located above the burner ^ afterburner with a catalytic element, heat exchanger, characterized in that in order to increase the efficiency of the device and ensure compactness and reduce material consumption of ty, it is equipped with a V-shaped distribution grid with an angle at the apex of 120-140 °, installed directly between the heat exchanger and the catalytic element, made in the form of two inclined tetrahedral prisms in contact with the upper inner faces, and the pipe for supplying ventilation emissions is located with the possibility of intersecting its axis with the axis of the burner on the opposite side of the combustion chamber. 2. The device according to claim 1, characterized in that, in order to equalize the flow at the inlet to the heat exchanger, perforation with a live cross section of 20-40% and petals bent downward from the top of the distribution grid is made on the surface of the distribution grid.