SU1733646A1 - Method of neutralizing toxical combustion products - Google Patents

Abstract

This invention relates to a technique for treating exhaust gases and can be used in internal combustion engines and gas turbines. The method consists in supplying a neutral non-combustible reagent to the hot neutralized products of combustion and spraying it with gasified fuel. 2 Il.

Description

This invention relates to a technique for treating exhaust gases in internal combustion engines and gas turbine engines.

There is a known method of neutralizing toxic combustion products by passing these products through a catalyst bed.

The disadvantages of this method are the high cost of the catalyst, as well as the fact that it can destroy only a limited number of toxic products and is ineffective in absorbing nitrogen oxides.

A known method of suppressing toxic substances, in particular the release of nitrogen oxides, by injecting a non-combustible substance, in particular water, into the combustion zone. The disadvantage of this method is that when uncontrolled water is introduced into the combustion zone, the completeness of combustion is reduced, the engine's efficiency and the release of other toxic products - CO and products of incomplete combustion of hydrocarbons.

A known method of neutralizing toxic products of combustion, consisting in

that the neutralizing non-combustible component is injected into the combustion products, which represents aqueous solutions of ammonia, hydrazine and other chemically active products that react with oxides of nitrogen in a narrow temperature range, converting them to non-toxic compounds.

The disadvantage of the prototype is low suppression efficiency, large dimensions of neutralizers.

The aim of the invention is to increase the efficiency of neutralization.

This goal is achieved by additionally introducing a gasified combustible substance into the combustion products, and the input of a neutralizing noncombustible reagent is carried out by spraying it with a gasified combustible substance.

Figure 1 presents a diagram of the device that implements the proposed method; Fig. 2 shows an example of the design of a spray atomizer nozzle.

A device for implementing the proposed method comprises a housing 1 with a nozzle 6

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2 and 3 supply and removal of the neutralized combustion products from the power plant, in which the swirler 4 of the neutralized combustion products is fixed, with the nozzle 5 coaxially installed in it, to which the fuel supply and supply tubes 6 and 7 are connected. The latter is connected via heat exchanger-evaporator 8 to a fuel supply system (not shown).

The nozzle contains a hollow body 9 with a groove 10, in which a porous liner 11 permeable to liquid and gas and an adjoining membrane 12 with nozzles 13 are installed. The liner 11 and membrane 12 are fixed in the housing by fitting 14 with a lock nut 15 and sealed with seals 16 and 17. The groove 10 forms with the walls of the porous liner an annular cavity 18 connected by a hole 19 to the tube 6 welded to the body 9. The tube 6 is connected to the nozzle fitting 14.

When neutralizing low-temperature combustion products, case 1 can be equipped with an igniter 20, and with low oxygen content in neutralized gases it can have additional means for supplying air into case 1 (not shown).

When supplying neutralized combustion products through the pipe 2, they pass through the swirler 4 and form in the housing 1 a recirculation zone 21. When serving through

the fuel tube 7 is vaporized in the heat exchanger 8 and flows through the opening 19 into the porous liner 11 and then through the nozzle 13 of the membrane 12 exhausts into the recirculation zone 21 in the form of jets, which either ignite in the combustible combustion products, or ignite by the igniter 20 and form stable afterburning zone. If there is not enough oxygen in the products to be neutralized for stable afterburning, a pre-mixed combustible mixture can be supplied through the tube 7.

When fed through the tube 6 of the liquid neutralizer, it enters through the nozzle 14 into the nozzle, wets the porous liner, in which a two-phase mixture forms in the flow of pores with gaseous fuel, which expires from the nozzles 13 of the membrane 12 into the recirculation zone 21.

Claims (1)

Invention Formula A method of neutralizing toxic combustion products by introducing a neutralizing nonflammable reagent into the combustion products, characterized in that, in order to increase efficiency, a gasified combustible substance is introduced into the combustion products, and the neutralizing nonflammable reagent is introduced by spraying it with a gasified combustible substance. 2 i Jo FIG. 2 12 eleven