SU883530A2 - Waste gas neutralizer - Google Patents

Description

(54) EXHAUST GAS NEUTRALIZER

The invention relates to exhaust systems equipped with means and purification of spent g-elements, in particular to catalytic converters from internal combustion engines. According to the main author. St. No. 794233 is known for an exhaust gas neutralizer, comprising a housing with an inlet and a continuous tube, in which is placed a flat reactor, which restricts & ample the cavity of the granulated catalyst. The main reactor is made in a bidet of a set of strips bent along the radius in one direction, mounted on the ribs and fixed fixed on the side stacks of the framework. A set of strips can be installed across or along the longitudinal axis of the reactor, as well as radially to the center of the re, actor. The distance between the strips in the set is 0, 3 - 0.5 of the diameter of the catalyst granules, and the strips themselves are made in the form of equal strength beams. Making gas permeable grids from a set of strips eliminates warping of the reactor and its destruction due to the uneven temperature field. The shape of the reactor allows each of the entire lane to change its position independent of the other, since each of them is a separate element. To reduce the defformacine bands from internal thermal stresses, they have a curvilinear network in plan. This makes them moveable during heating and cooling. In order to perceive vertical loads on the weight of the catalyst, bands are placed on the Cll edge. The disadvantages of the known neutralizer include the decrease in the packing density of the catcher during heating of the reactor due to the difference in temperature coefficient of linear expansion of the metal of the reactor core and catcher. This leads to the formation of voids in the cavity of the reactor and accordingly increases the abrasion and rest of the granular catalyst.

The purpose of the invention is to reduce attrition and generation of the catalyst by maintaining a constant packing density of the latter.

The goal is achieved by the fact that the strips are installed with an angle of inclination to the catalyst bed so that the radius of their curvature is directed towards this layer. The angle of the radially curved bands to the catalyst bed is; 5-20. The strips of the upper gas-permeable grille are directed by a convexity towards the inlet nozzle, and the strips of the lower gas-permeable lattice are directed towards the outlet nozzle.

On (}, 1, 1 shows an exhaust gas neutralizer, general view; in Fig. 2 - section A-A in Fig. 1; in Fig. 3 - section in Fig. 2; in Fig. 4 - section B-B in Fig 2

An exhaust gas neutralizer for an internal combustion engine consists of body 1 inlet 2 and outlet 3 inlets.

Inside the casing 1 a flat reactor 4 is mounted with a granular catalyst 5. The cage of a flat reactor 4 is made of side walls 6 and strips 7 representing gas permeable lattices. Diarrhea 7 limit the cavity of the granular catalyst from the bottom and top.

The strips 7 in the gas-permeable lattice are installed with an equal angle of inclination to the horizontal axis of symmetry of the reactor 4, the strips being inclined so that their radius of curvature is directed towards the catalyst bed.

Fixed mounting of the ends of the strips on the side walls eliminates their change in the transverse direction; lines in the points of support. The granular catalyst 5 is poured into the floor of the reactor core through the filling neck 8.

The exhaust gas neutralizer for internal frigging engines works as follows.

The spent gas from the engine enters through the inlet pipe 2 into the internal cavity of the neutralizer under the reactor 4 and passes between the upper bands 7 and enters the catalyst bed 5, where acidification of harmful components occurs. Then, the purified gases through the lower row of strips 7 enter the cavity under the reactor 4 and are thrown out through the outlet 3. Install the strips 7 at an angle to the cavity of the reactor 4 so that their radius of curvature is directed to the catalyst bed. With increasing thermal stresses, the strip 7 lengthens along the radius of curvature.

This creates a biasing force directed from the top towards the bottom grid of the reactor towards each other. The pressing force that occurs during the operation of the neutralizer helps to eliminate cavities in the catalyst bed and ensures a constant packing density of the catalyst. Preserving the packing density of the catalyst reduces attrition and generation of the catalyst due to the absence of free cavities in the reactor.

Such a design of the reactor allows to reduce the operating costs associated with the necessity of periodically feeding the catalyst.

Claims (4)

1. Exhaust gas neutralizer according to ed. St. No. 794233, characterized in that, in order to reduce attrition and generation of the catalyst by maintaining a constant packing density of the latter, the stripes bent along the radius are inclined to the catalyst layer so that the radius of curvature is directed towards this layer. 2. The neutralizer according to claim 1, characterized in that the angle of inclination of the bands curved to the catalyst bed to the catalyst bed is 5-2O. 3. The neutralizer according to claim 1, in accordance with claim 1, that the strips of the upper gas-permeable lattice are located. bulge in the direction of the inlet. , 4. The neutralizer according to claim 1, about tons of l and the fact that the strips of the lower gas-permeable lattice are located i convex in the direction of the outlet pipe. Sources of information taken into account in the examination 1. USSR author's certificate number 794233, cl. 01N 3/15, 1979. Th