RU1827011C - Device for cleaning ventilation exhausts - Google Patents

Abstract

FIELD OF THE INVENTION This invention relates to the purification of ventilation emissions from industrial equipment and containing organic impurities. The goal is to increase the degree of purification by equalizing the velocity and temperature fields of gas flows. The device comprises a heat exchanger, a catalytic element, thermoelectric heaters. Between the heat exchanger and heaters and at the inlet of the contaminated and cleaned air into the heat exchanger there are distribution grilles made in the form of a horizontal row of plates inclined to each other with the formation of flat confusers. Thermoelectric heating elements are arranged in rows with a pitch of 3-4 diameters of the heater and separated by partitions of heat-conducting material with a high degree of blackness. 2 ill.

Description

FIELD OF THE INVENTION This invention relates to the purification of ventilation emissions from industrial equipment and containing organic impurities.

The purpose of the invention is to increase the degree of purification of ventilation emissions by equalizing the velocity and temperature fields of the gas stream.

In FIG. 1 shows a front view of the device; in FIG. 2 is a side view.

The device consists of a rectangular metal housing 1, in the lower part of which there are catalytic baskets 2 located on a frame 3 formed by metal plates welded to the inner sides of the walls of the housing, tilted by the upper parts to each other. For installation of catalytic baskets from two opposite

sides of the frame are windows having perimeter flanges 4. The catalytic baskets also have a flange 5. In the housing 1 there are windows 6 for installing catalytic baskets, from the ends of the catalytic baskets there are compartments of heating elements 7. A heat exchanger 8. is placed above the catalytic baskets 8. Between them there is a distribution grid 9 A grill 10 is located at the entrance to the heating element compartment; the same grill 11 is located in the upper part of the heat exchanger. In the upper part of the housing there is a pipe 12 for input of ventilation emissions and a pipe 13 for outlet of purified gas.

The device operates as follows.

Ventilation emissions through duct 12 and grille 11 feed and heat transfer00

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nickname 8, where they are heated due to the heat of the purified gases and enter through the grate 10, which ensures equalization of the air flow at the entrances to the compartments of the heaters 7, where the gases are heated to the reaction temperature. Gas passes through the catalyst through the air intake surfaces of the catalytic baskets 2, where the process of flameless oxidation of ventilation emissions takes place. The purified gas then passes through the distribution grid 9 to the heat exchanger 8. The purified gas, passing through the heat exchanger 8, gives off part of the heat to the ventilation emissions and is removed through the duct 13 from the installation.

The claimed device has the following technical and economic advantages compared with the prototype:

an increase in the degree of purification of ventilation emissions due to equalization of the velocity and temperature fields of the gas flow, due to the presence of distribution grids and the location of the heating elements, which respectively leads to an increase in the efficiency of heat transfer in the heat exchanger;

increasing the degree of purification of ventilation emissions by eliminating the leakage of crude gas between the frame for

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installation of catalytic baskets and the housing of the device;

increased durability of TE-Nov, easier installation and maintainability of the device;

quick exchange of catalytic baskets.

Claims (1)

The claims A device for cleaning ventilation emissions, comprising a heat exchanger, heat electric heaters and a catalytic element, characterized in that, in order to increase the degree of purification due to equalization of the velocity and temperature fields of the gas flow, distribution grilles are installed at the inlet to the heat exchanger and the compartments of the heat heaters, made in the form of p yes plates, pairwise inclined to each other with the formation of flat confusers with a coefficient of live section of 0.3-0.4, the catalytic element is made in the form of removable baskets which are connected to one another and mounted on the frame, at the ends of which there are arranged rows of heat-electric heating elements with a step of 3-4 element diameters, while the elements in each row are offset by 0.5 steps in each row and are separated by partitions from heat-conducting material. Vt / tf Fig. Ј