SU661189A1 - Pneumatic burner - Google Patents

Description

one

The invention relates to combustion nozzles, preferably liquid smelting, and can be used in glass melting and heating furnaces.

A known nozzle containing a flat-nozzle fuel nozzle, a metal mesh embedded in a nozzle for aligning the fuel flow across the width of the fuel nozzle, an outer casing with a rectangular cavity and end flat-winged jaws forming a slotted exit nozzle with a longitudinal axis parallel to the longitudinal axis of the flat-bodied fuel nozzle openings. The outer casing forms with the fuel nozzle a cavity for supplying the atomizer with section 1 increasing towards the exit.

A disadvantage of the known nozzle is the absence of a channel for supplying the atomizer to the root of the fuel jet, which leads to a decrease in the quality of atomization.

Also known is a pneumatic nozzle, the closest to the technical essence of the invention, containing a cylindrical displacement valve located in front of the nozzle and coaxially with the latter, which is communicated

With a fuel line hole in the end, and with a duct - tangential channels located at least two rows in the side wall of the chamber 2.

However, the known nozzle does not provide a sufficiently high displacement efficiency.

The aim of the invention is to improve the efficiency of mixing.

This goal is achieved by the fact that the channels of neighboring rows have the opposite spin. In addition, the diameter of the hole in the end of the chamber is 0.5-1.0 times the diameter of the displacement chamber.

FIG. 1 shows a nozzle, a longitudinal section; in fig. 2 is a section A-A in FIG. one; in fig. 3 is a section BB in FIG. one; .on FIG. 4 shows a section B-B in FIG. one.

Claims (2)

The nozzle contains a nozzle L coaxially with a cylindrical displacement chamber 2 connected to the fuel line 3 with an opening 4 in the end face with a diameter d of 0.5-1.0 diameters do of the mixing chamber 2. For supplying the atomizer chamber 2, an air pipe 5 is located in the nozzle, connected to chamber 2 by tangential channels 6, 7, which are located on the side wall of the mixing chamber 2, at least in two rows, so that channels 6 have opposite channels 7 twist. The nozzle works as follows. Fuel through the fuel line 3 enters through the opening 4 into the mixing chamber 2. The sprayer is lifted, the duct 5 is fed into the channels 6, 7, from where the swirling flow enters the mixing chamber 2. The direction of the twist of the atomizer by the channels 6 is opposite to the direction of its twisting by the channels 7. When the fuel reaches the portion of the chamber 2 in which the channels 6 are located, the first stage of spraying is carried out. Under the action of a high-speed VHF nebulizer, the fuel is crushed, entrained in the nebulizer flow and squeezed to the periphery of the mixing chamber 2 (to its side walls). An emulsion of fuel and a sprayer, formed in this section, and having a tangential and axial velocity component, goes to the section of the chamber 2 in which the guide channels 7 are located, where the flow of the emulsion collides with the flow in the opposite direction. channels 7 to chamber 2 mix. The vortex flow in this section is also enriched with particles of the top pour. When two high-velocity flows collide, an intensive process of splitting the fuel into the smallest droplets occurs, mixing them with the sprayer flow and distribution over the jet section. The tangential velocity components here are extinguished and the mixture of fuel and atomizer formed with it has basically an axial velocity component. However, local vortices are retained in the jet, therefore, the processes of mixing and crushing the fuel continue as the jets flow through nozzle 1. Such an implementation of the pneumatic nozzle allows the burning of contaminated fuel oil to burn with a low kinematic energy and high combustion efficiency, which increases reliability. Claims 1. A pneumatic nozzle comprising a cylindrical mixing chamber located in front of the nozzle and coaxially with the latter, which is connected to the fuel line by a hole in the end, and with an air line - by tangential channels arranged in at least two rows in the side wall of the chamber, characterized by By the fact that, in order to increase the efficiency of mixing, the channels of adjacent rows have the opposite spin. 2. The nozzle according to claim 1, wherein the diameter of the opening in the end of the chamber is 0.5-1.0 of the diameter of the mixing chamber. Sources of information taken into account in the examination 1. German Patent N 264045, cl. 24 V 8/02, 1912. 2. The author's certificate N ° 338748, cl. F 23 d 17/00, 1970. Aa Wed. Fig.Z Rig.