RU180421U1 - CATALYTIC NEUTRALIZER WITH AIR SUPPLY - Google Patents

Abstract

The catalytic converter with an air supply comprises a housing (1) with an inlet pipe (2) and an outlet pipe (3), sensors (4). The inlet and outlet pipes (2) and (3) are made in the form of a truncated cone and provided with flanges for fastening to the output system. The catalytic units are installed in the housing (1), one of which is the primary processing unit (5), the second is the secondary processing unit (6), and a mixer (7) is installed between them. The housing (1) is equipped with a fitting (8) for supplying additional air. To control the amount of oxygen after the catalytic unit (5) of the primary processing, a sensor (4) is installed, which is connected to the engine control system. The problem of increasing the efficiency of an element acting on exhaust gases was solved in order to reduce their toxicity.

Description

This utility model relates to the automotive industry, namely to exhaust gas treatment devices for automotive engines with positive ignition.

Known catalytic converter, comprising a housing with inlet and outlet nozzles, ceramic-metal porous oxidizing catalytic units installed in the housing with a gap that is simultaneously thermal insulation between their outer surface and the inner surface of the wall of the housing, coaxially mounted hollow carbon black metal-ceramic porous block, simultaneously being a filter, and a ceramic-metal porous reduction catalytic unit, which, in turn, it has been installed coaxially with metallic porous oxidizing catalytic blocks, a nozzle for supplying auxiliary gas, the cavity of which is divided into channels, one of which is intended for supplying an oxidizing agent to the oxidation zone between the inner surface of the ceramic-metal porous oxidizing catalyst block and the outer surface of the carbon black porcelain ceramic block, and the other for supply of auxiliary gas to the recovery zone between the inner surface of the porcelain cermet continuous catalytic block and the outer surface of the cermet porous reduction catalytic block, the outer surfaces of the carbon black cermet porous block and the cermet porous reducing catalytic block formed by longitudinal solid or hollow ribs (patent RU No. 2163675, IPC F01N 3/28, publ. 02/27/2001).

The closest device of the same purpose to the claimed utility model in terms of a set of essential features and taken as a prototype is an engine exhaust gas converter comprising a detachable housing with cylindrical catalytic units located inside, provided with inlet and outlet nozzles, in which the detachable housing includes a central cylindrical part and two side cylindrical parts, one of which is connected to the inlet and the other to the outlet nozzles having the shape of a truncated cone and equipped with flanges for fastening to the exhaust system, the central and side parts being connected in a single housing using studs fixed in stops and tightened by nuts, two catalytic units are located at a distance from each other, each of them protruding from the central part for at least 50 mm from the plane of the connector and is isolated from the walls of the housing by a thermally insulating gasket of thermoelastic material, and temperature sensors are installed between the catalytic blocks in the inlet and outlet pipes (patent RU No. 130629, MP F01N 3/00, publ. 07/27/2013).

Known solutions in most cases have insufficient impact on exhaust gases in terms of reducing emissions, namely, nitrogen oxides.

The task to which the claimed technical solution is directed is to increase the efficiency of the element acting on the exhaust gases in order to reduce their toxicity.

The problem is achieved in that in a catalytic converter with an air supply containing a housing with inlet and outlet nozzles made in the form of a truncated cone and provided with flanges for fastening to the output system, the catalytic units installed in the housing, one of which is a primary processing unit, and the second secondary processing unit, sensors, while a mixer is installed between the catalytic units, and the housing is equipped with a nozzle for supplying additional air.

The combination of distinctive features, namely, that a mixer is installed between the catalytic blocks, and the housing is equipped with a nozzle for supplying additional air, which makes it possible to increase the efficiency of the element acting on the exhaust gases in order to reduce their toxicity.

The claimed technical solution is illustrated by the images:

FIG. 1 is a structural diagram of a catalytic converter with air supply;

FIG. 2 is a schematic illustration of a catalytic converter with air supply.

The catalytic converter with an air supply comprises a housing 1 with an inlet pipe 2 and an outlet pipe 3, sensors 4.

The inlet and outlet pipes 2 and 3 are made in the form of a truncated cone and provided with flanges for fastening to the output system.

The catalytic units are installed in the housing 1, one of which is a primary processing unit 5, the second is a secondary processing unit 6, and a mixer 7 is installed between them.

The housing 1 is equipped with a fitting 8 for supplying additional air.

To control the amount of oxygen after the primary processing unit 5, a sensor 4 is installed, which is connected to the engine control system.

The device operates as follows.

The exhaust gases from the engine through the exhaust system through the inlet pipe 2 fall into the catalytic unit 5 of the primary processing, where the redox reaction occurs, aimed at reducing nitrogen oxides to preliminary reduce the toxicity of the exhaust gases. Next, the exhaust gases enter the mixer 7 to change the flow parameters and mix with heated in the internal cavities of the catalytic converter air coming in through the nozzle 8 for supplying additional air. The source of air can be any external device that allows you to receive it under pressure. A prerequisite for the operation of the secondary processing catalyst unit 6 is the presence of an oxidizing agent, while the oxygen of the atmosphere is the most accessible. After the mixer 7, the mixed stream enters the secondary processing unit 6, where a hydrocarbon oxidation reaction takes place to further reduce exhaust toxicity. For an optimal reaction, it is necessary that the air supplied to the device has a temperature close to the temperature of the exhaust gases, i.e. air must be pre-prepared before being fed into mixer 7. To this end, air after being directed to the catalytic converter through the air supply nozzle 8 passes through specially organized internal cavities between the catalytic units and the outer casing 1 of the catalytic converter. After the interaction of the mixture of exhaust gases with air in the catalytic unit 6 of the secondary processing, the neutralized exhaust gases are removed through the exhaust pipe 3 in the exhaust system of the car. The feedback sensor 4 allows you to maintain the optimality of the neutralization process in the catalytic block 6 of the secondary exhaust gas treatment.

The claimed technical solution allows to reduce the toxicity of exhaust gases, and also helps to reduce the fire hazard of the element affecting the exhaust gases.

The advantage of the proposed device is the ability to achieve the environmental class of the car and engine to Euro-5 and Euro-6, without making changes to the engine design.

The claimed technical solution meets the requirement of industrial applicability and is possible for implementation on standard processing equipment.

Claims (1)

A catalytic converter with air supply, comprising a housing with inlet and outlet nozzles made in the form of a truncated cone and provided with flanges for attaching to the output system, catalytic units installed in the housing, one of which is a primary processing unit, and the second secondary processing unit, sensors characterized in that a mixer is installed between the catalytic blocks, and the housing is equipped with a nozzle for supplying additional air.

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