RU95106546A - Catalytic converter for diesel engine - Google Patents

Abstract

FIELD: mechanical engineering, diesel engines; cleaning exhaust gases from harmful components and soot. SUBSTANCE: proposed catalytic converter has housing with double walls and thermal insulation in between, inner and outer cross partitions, end face covers, inlet and outlet branch pipes, flanges, catalytic filters, temperature compensators, and reactor. Reactor inner space is divided by partitions into several spaces one of which is designed for distribution of gas flow, the other, for cleaning gases by filters and the third one, for uniting flow of cleaned gases. Tube is fitted in partition between gas distribution spaces which is extension of intake branch pipe. Spring-loaded valve opening into pass-trough branch pipe is installed in end face portion of tube. Pass-through branch pipe is arranged in longitudinal partition between spaces of where gases are cleaned by filters, between cross partitions dividing gas flow distribution spaces, gas cleaning spaces and gas flow uniting spaces. Moreover, catalytic converter has houses on which cermet filters are secured. One part of filters contains high temperature catalysts, and other part, low temperature catalysts. Cermet filters can be made also in form of hollow cups with segment-shaped bottoms in cross section. Rotary tubular sector with port, measuring 0.48-0.50 of tube cross section and port, measuring 0.70-0.75 of tube cross section are located over entire length of tube installed in partition between gas flow distribution spaces. EFFECT: increased service life of catalytic converter, improved quality of exhaust gas cleaning from nitrogen oxides and decreased smoking and toxicity.

Claims (1)

Usage: in the engine industry for cleaning exhaust gases of diesel engines from harmful components and soot. The inventive catalyst contains a housing with double walls and thermal insulation between them, internal and transverse partitions, end caps, inlet and outlet pipes, flanges, catalytic filters, temperature compensators, a reactor, the inner surface of which is divided by partitions into several cavities, one part of which it is intended for distribution of the gas flow, the other part of the cavities - for the purification of gases through filters and the third part - for combining the flow cleaned gases, moreover, a pipe is installed in the partition between the gas flow distribution cavities, which is a continuation of the inlet pipe, in the end part of which there is a spring-loaded valve with an outlet in the through pipe, located in the longitudinal partition between the gas cleaning cavities through the filters, between the transverse partitions separating the cavities distributing gas flows, purifying gases through filters, and combining the flow. In addition, the converter is equipped with bonnets on which ceramic-metal filters are fixed, one part of which is made with high-temperature catalysts and the other part with low-temperature ones. Ceramic-metal filters can be made in the form of hollow glasses with bottoms, representing segments in section. On the pipe installed in the partition between the gas flow distribution cavities, a rotary tubular sector with a window of 0.48 - 0.50 of the cross section of the pipe and a window of 0.70 - 0.75 of the cross section are placed along the entire length. Effect: allows to increase the catalyst resource by 1.50 - 1.75 times, the quality of purification of exhaust gases from nitrogen oxides by 25 - 30%, and also reduce the smoke and toxicity of diesel engines by 65 - 68%.