CS231359B1 - High-speed gas-fired burner with two-stage combustion air supply - Google Patents

Abstract

The invention falls into the field of thermal engineering devices and relates to a burner for gaseous fuels with a two-stage supply of combustion air. The purpose of the invention is to achieve a more uniform distribution of the secondary combustion air by placing partitions in the supply chamber and thereby eliminating pressure fluctuations. This achieves noiseless operation of the burners without transmitting vibrations to the surrounding structure of the unit. The above purpose is achieved by a two-stage supply of combustion air to the combustion chamber of the burner* where the primary combustion air is supplied from the rear together with the gaseous fuel and the secondary combustion air is supplied from the side through channels from the supply chamber.

Description

231 3S9

BACKGROUND OF THE INVENTION The present invention relates to a high-speed burner for gaseous fuel with a two-stage combustion air supply to the combustion chamber.

The previously used high speed burners with separate combustion air and fuel gas supply to the combustion chamber suitable for the use of preheated air show considerable noise. Noise is due to pressure fluctuations in the combustion chamber. It has an irregular character, i.e. the observer shouts as a series of muted detonations accompanied by the formation of shake, which is transmitted to the surrounding structure of the aggregate.

This drawback is avoided by the high-speed gas-fired burner with a two-stage combustion air intake of the invention, which consists of a combustion chamber enclosed by a wall in the front of which passes into a nozzle into which a supply pipe is provided primary combustion air in which gaseous fuel feed pipes are located. In the combustion chamber, the secondary combustion air supply ducts exiting the inlet chamber with a partition located upstream of the inlet ducts and with an inlet opening resulting in a tangential inlet chamber extend into the combustion chamber. The combustion chamber wall and the casing wrapper. The oven is equipped with a fuel inlet port and a primary combustion air inlet neck ·

By placing the baffles in the inlet chamber upstream of the channels of the secondary combustion air, a more even distribution of the air flow into the channels is achieved. By supplying secondary combustion air to the combustion chamber from the side, a more uniform combustion of the fuel reaches δο, resulting in the removal of pressure fluctuations. In this way, sufficient quiet operation of the burners is achieved without transmitting vibrations on the occluded structure and aggregate.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an exemplary embodiment of a high speed burner according to the invention, wherein FIG. 1 shows a cross section through the burner and FIG. 2 shows a cross section through the combustion chamber;

The high-speed burner consists of a combustion chamber 1 ©, bordering a wall 4, which passes into the nozzle 8 in the front part. In the rear part of the combustion chamber 1 an oven 6 flows out of the primary combustion air in which the gaseous fuel feed pipes 2 are located. From the side into the combustion chamber 1, the secondary combustion air supply ducts emanate from the supply chamber 2. The inlet chamber 2 is provided with a partition 10 at the inlet of the ducts and at the inlet opening 11 for supplying secondary combustion air at the inlet. tangential direction. The combustion chamber wall 1, and the inlet chamber 2 are wrapped in a casing The tubing is equipped with an inlet port 2 for supplying a secondary combustion air and a supply port 12 for supplying gaseous fuel.

The gaseous fuel is fed through the inlet port 12 into the tubes 2 from which it flows into the combustion chamber 1. Here, it is mixed with the primary combustion air supplied by the inlet port 2 through the passage 2. The secondary combustion air is fed through the inlet port 11 into the inlet chamber 2, in which enters the combustion chamber 1, where it mixes with the combustion mixture of the primary combustion air and the fuel gas. The partition 10 provides an even distribution of air through the channel. The flue gas formed by the mixture of combustion gases emits at high speed from the combustion chamber JL through the nozzle 8.

The high-speed burner of the present invention is useful for preheating furnaces in the metallurgical and engineering industries and for firing furnaces in the ceramic industry.

Claims (1)

High-speed gaseous fuel burner with two-stage combustion air supply, characterized in that it consists of a combustion chamber (1) delimited by a wall (4) in the front part passing into the nozzle (8) into which the inlet pipe (6) primary combustion air, in which the stoves (3) for supplying the gaseous stump and laterally exit the ducts (5) for supplying the secondary combustion air, exiting from the supply chamber (2) with a partition (10) located in front of the inlets to the ducts (5); an inlet opening (11) resulting tangentially into the inlet chamber (2), the wall (4) and the inlet chamber (2) being encased by a jacket (9), the tube (6) being equipped with an inlet throat (7) for supplying primary combustion air; inlet (12) for gaseous fuel supply ·