RU66009U1 - TWO-FLOW GAS BURNER - Google Patents

Abstract

A double-stream gas burner refers to devices for burning gases in the furnaces of heat-stressed technological installations and can be used in the petrochemical, energy, metallurgical industries and other sectors of the national economy.

The technical result is to reduce the level of emission of nitrogen oxides in the environment by lowering the temperature of combustion in the furnace space.

To achieve a technical result, the burner comprises a housing with a gas supply pipe made in the form of a truncated cone oriented with a smaller base towards the outlet, an air supply pipe located tangentially to the body, an injection chamber with an output toroidal embrasure, a cylindrical nozzle located inside the body, muffled from the outlet side connected to the gas supply pipe, a water supply pipe connected to the injection chamber. Holes are made in the walls of the cylindrical nozzle, with screw channels located inside. The axis of the holes is directed at an acute angle to the radial planes and to the nozzle generatrix towards the exit and in the direction of rotation of the air flow in the housing.

Description

The utility model relates to devices for burning gases in the furnaces of heat-stressed technological installations and can be used in the petrochemical, energy, metallurgical industries and other sectors of the economy.

The problem is that the known burner devices do not have the necessary environmental excellence combined with reliable operation. All gas burners have high reliability in operation, but are characterized by high levels of nitrogen oxide emissions into the environment, since they do not allow controlling the thermal reaction of combustion in the furnace space.

Known vortex gas burner [1], containing a confuser mixer with holes, connected at the inlet to the housing, and at the outlet to a cylindrical nozzle with an outlet toroidal embrasure, an annular manifold with a gas supply pipe, the mixer being connected to the collector by rows of holes.

Known burner provides high efficiency combustion of fuel gas by obtaining a homogeneous mixture as a result of dispersed interaction of jets of gas and air in the volume of the mixer confuser.

A disadvantage of the known vortex gas burner is a decrease in the efficiency of burning gas fuel when changing its performance over a wide range.

This is due to the fact that the known burner has two independent mixing chambers, which does not allow you to precisely control the flow of the fuel mixture. As a result, gas overruns, which

leads to the emission of nitrogen oxides into the atmosphere.

The closest to the claimed technical essence and the achieved effect is a two-stream gas burner [2], comprising a housing with a gas supply pipe made in the form of a truncated cone oriented with a smaller base to the outlet, an air supply pipe located tangentially to the body, an annular collector with a pipe gas supply, a confuser mixer with holes in the walls made in the form of conical swirling chambers with central jet openings and screw screw channels, cylindrical with A hole located inside the casing, suppressed from the outlet side, connected to the gas supply pipe, holes are made in the nozzle walls, the axes of which are directed at an acute angle to the radial planes and to the nozzle generators towards the exit side and in the direction of rotation of the air flow in the casing, inside the openings nozzles are located helical channels.

A dual-stream gas burner operates as follows.

Fuel gas is supplied through the nozzle to the central nozzle, passes through openings with screw channels into the housing, into which air is supplied through the air supply nozzle, as a result of which gas is mixed with air during tangential interactions of gas vortices exiting the nozzle through the holes with screw channels.

At the same time, fuel gas is supplied through the pipe into the cavity of the annular manifold, which passes through the conical swirl chambers in the walls of the confuser mixer with central jet openings and screw screw channels. As a result, swirling gas vortices are introduced dispersed into the confuser mixer in tangential directions, which interact with the gas-air mixture coming from the housing,

forming a swirling gas-air flow in a confuser mixer, in which small-scale mixing of gas in the form of vortices with air occurs. Next, the rotating gas-air flow enters the combustion chamber for combustion.

Known burner allows you to get a homogeneous gas mixture, to reduce the coefficient of excess air for combustion, which ensures complete combustion of the fuel and increase the temperature level in the combustion volume and reduce the specific consumption of gas fuel.

The disadvantage of this known burner is the high level of emission of nitrogen oxides in the environment.

This is due to the high combustion temperature in the furnace space, which leads to an increase in the level of emission of nitrogen oxides into the environment.

The problem solved by the utility model is to create such a dual-stream gas burner, which allows to reduce the level of nitrogen oxide emission into the environment by lowering the combustion temperature in the furnace space.

To solve the problem in a known two-burner gas burner containing a housing with a gas supply nozzle made in the form of a truncated cone oriented with a smaller base to the outlet, the air nozzle is located tangentially to the housing, an annular manifold, a cylindrical nozzle located inside the housing are muffled from the outlet side connected to the gas supply pipe, in the walls of which holes are made, with screw channels located inside, the axis of the holes are directed at an acute angle to the radial to the planes and to the nozzle generators in the direction of exit and in the direction of rotation of the air flow in the housing, the annular collector is made in the form of a chamber

injection with an outlet toroidal embrasure and the gas supply pipe is replaced by a water supply pipe connected to the injection chamber.

The features distinguishing the claimed burner from the known one adopted as a prototype are: the execution of the annular manifold in the form of an injection chamber with an output toroidal embrasure and supplying the burner with a water supply pipe connected to the injection chamber.

Thanks to the distinguishing features, the emission of nitrogen oxides into the environment is reduced. This is due to the fact that a rotating air-gas stream with impurities of gaseous pollutants formed in the body enters the combustion along with clean, or contaminated with oil products or household wastewater, water entering the injection chamber through the water supply pipe. As a result, the combustion temperature in the furnace space decreases, which leads to a decrease in the level of nitrogen oxide emissions into the environment.

The proposed gas burner is illustrated by the drawings shown in figures 1-3

Figure 1 shows the proposed gas burner, a longitudinal section; figure 2 section aa.

The burner comprises a housing 1 in the form of a truncated cone, a nozzle for supplying air 2, a cylindrical nozzle 3 located inside the housing 1, suppressed from the outlet side and connected to the gas supply pipe 4, an injection chamber 5, with an output toroidal embrasure 6, a water supply pipe 7.

Holes 8 are made in the walls of the cylindrical nozzle, the axes of which are directed at an acute angle to the radial planes and to the nozzle generatrix towards the exit and in the direction of rotation of the air flow in the housing. Inside the holes are made screw channels

9.

The burner operates as follows.

Fuel gas is supplied through a nozzle 4 to a central nozzle 3, passes through holes with screw channels 8 into a housing 1, into which clean or pollutant air is supplied through a nozzle 2. As a result, gas is mixed with air and a swirling gas flow occurs. Rotating gas flow from the housing 1 enters the injection chamber 4.

At the same time, water or oil-containing or household wastewater pre-emulsified to a homogeneous mixture of the required dispersion is supplied to the injection chamber 5 through the pipe 7.

Then the gas-air flow and water through the toroidal embrasure of the injection chamber enters the combustion chamber for combustion.

The inventive two-burner gas burner allows to lower the combustion temperature in the furnace space, since the air-gas mixture enters the combustion along with water and, therefore, to reduce the emission of nitrogen oxides into the environment.

Sources of information taken into account:

1. A.S. No. 1186895, MKI ⁴ F23D 14/02. Gas burner / I.P. Slobodyanik, V.M. Klzhzhin, AMOrlov, V.I. Butin, V.A. Rudnev and V.A. Kruglov (USSR) Krasnodar Polytechnic Institute and Togliatti Production Association “Synthesis of Rubber” (USSR ) - No. 3677079/24 - 06, declared 10.11.83, publ. 10.23.85, bull. Number 39.

2. P. No. 2115064 of the Russian Federation, MKI ⁶ F23D 14/02. Double-flow gas burner / I.P. Slobodianik (RF) - No. 96116186/06; declared 08/08/96; publ. 10.07.98., Bull. No. 19.

Claims (1)

A two-stream gas burner containing a housing with a gas supply pipe made in the form of a truncated cone oriented with a smaller base towards the outlet, an air supply pipe located tangentially to the body, an annular manifold, a cylindrical nozzle located inside the body, muffled from the outlet side, connected to the supply pipe gas, in the walls of which holes are made, with screw channels located inside, while the axis of the holes are directed at an acute angle to the radial planes and to the nozzle generators the exit and in the direction of airflow rotation in the housing, characterized in that the annular manifold is formed as a injection chamber with an output toroidal porthole, and is further provided with a water supply pipe connected to the injection chamber.