RU1813985C - Burner - Google Patents

Abstract

Usage: for burning gaseous fuels in various thermal units. The inventive diameter of the nozzle 3d and the angle between the axis of the nozzle and the radius of the housing vary in the circumferential direction, but the condition d (cos ty + + Vcos2V -2 hr + h const. 4 il.

Description

The invention relates to burners and can be used in thermal furnaces and combustion chambers of boiler and gas turbine plants.

The purpose of the invention is to increase the efficiency of the combustion process by improving the quality of the blend.

This goal is achieved in that the burner, comprising a housing with an annular gas supply pipe around it, having annular rows inclined with respect to the radius of the nozzle body, in each row of the nozzle is made with a different diameter and at a different angle to the radius of the housing, in each section, the condition

dfcostp} - v cos V 2 hr + hr const;

hV hr / A where d is the diameter of the nozzle;

1 / - angle of inclination of the nozzle to the radius of the housing;

A is the characteristic flow size;

hr radial penetration depth. It is known that

... (1); I-; h h / A.

 - h2r

It is also known that

hs2 - 2hs costf + (1- {1-hr) 23 O

or

hs cos V + V cos2 V 2 hr + h (2)

ate

with

00

oo oo

Joint venture

since hs an

yp-n ae

(3)

The condition for the implementation of 0 const, taking into account the specifics of the problem, can be obtained from equations (1-3) by a relation of the form

d (cos V + v cos tp - 2 hr + b const.

In the above formulas: 0 - mixing quality parameter; h is the penetration depth of the jets; A is the characteristic flow size; t /; is the angle between the axis and the radius.

cores to the radius of the nozzle body 3, moreover, in each row the nozzles are made with different diameters and at different angles of inclination to the radius of the body, while the condition is satisfied in each section

G1 Axis

AM

  d rfT;

G is the mass flow rate;

p is the density;

an is the shape coefficient of the jet;

l is the number of holes;

d is the diameter;

/ I flow coefficient;

indices: s - and the plane of the trajectory of the jet axis, g - along the radius (normal); 2 - restriction on the front edge of the jet; 3 - restriction on convective mass transfer; 1 - transverse component; cm is a mixture.

Thus, a uniform distribution of the transverse component over the angle is possible due to a change in the nozzle diameter along the distributor. Moreover, the diameter of the nozzle decreases from the point of supply and the collector to a diametrically opposite section (under the condition of one-sided supply). To ensure uniform distribution of the transverse component along the radius of the housing from equations (1-3), taking into account the specifics of the problem, it is necessary to additionally meet the condition

th (co $ t /) + cos2tp2 hr -f hr - const,

those. increase the angle from the point of supply to the distributor to the diametrically opposite section. To ensure that geometric and true match. values of the angle ty, the height of the nozzle must be at least 1.5 diameters.

An analysis of the scientific, technical and patent literature showed that well-known technical solutions having features similar to those distinguishing the present invention from the prototype were not found. The proposed technical solution has significant differences.

In Fig, 1 shows a longitudinal section of a device; FIG. 2 is a section AA in FIG. 1; in FIG. 3 - node In figure 2; in FIG. 4 - node C in figure 2.

The burner comprises a housing 1 with an annular gas supply pipe 2 around it, having annular rows obliquely located

d (cosgr + VCQS tr - 2bg + h-const.

The burner operates as follows.

Air enters directly into the housing 1, and the fuel from the annular gas supply pipe flows through the nozzles 3 into the housing 1, where it is effectively mixed due to the uniform distribution of fuel in the circumferential direction and radius due to the fact that the nozzles in each row are made with different diameters and at different angles to the radius of the body.

Studies conducted in the Hydrogasdynamics laboratory in a wide range of changes in the geometric and operational parameters: G 0 -U, 70; / Y 1.0 + 2.65; 5 0.098-U.785, showed that the highest results

by efficiency can be obtained provided:

1) condition d (cos ip +

+ VCOs2 -2hr + hr; const;

2) Ng Exz 0.59 + 0.61;

3) n- 1 35GCM H PCM

. S 0 A1 b A

Claims (1)

SUMMARY OF THE INVENTION A burner comprising a housing with an annular gas supply pipe around it, having annular rows of nozzles inclined with respect to the radius of the housing, characterized in that, in order to increase combustion efficiency by improving mixing, each a number of nozzles are made with different diameters and at different angles of inclination to the radius of the casing, while in each section the condition d (cos mp + vCos2 -2 hr + hf const, where d is the diameter of the nozzle; ty is the angle of inclination of the nozzle to the radius of the housing; hr hr / A is the penetration depth of the jets along the radius of the body; A is the characteristic flow size.