RU1793155C - Hearth burner - Google Patents

Abstract

Use: on boilers of small and medium capacity. SUMMARY OF THE INVENTION: the axis of the holes in two rows of one collector has their own angle of inclination, and counter-directed holes with the same angle of inclination of the axis are offset by the step between them. 5 ill.

Description

The acquisition relates to energy and can be used in boilers of small and medium capacity.

A hearth burner is known, comprising a tubular body with outlet openings of an o / n type 1.

A significant drawback of the burner is its low mixing efficiency, overestimated excess air ratio.

I- The closest technical solution is a hearth burner with staggered openings of opposing distributors 2.

0: a new disadvantage of the device is insufficient mixing efficiency, and as a result, cost-effectiveness.

An object of the invention is to increase fuel economy by increasing the completeness of combustion of fuel.

This goal is achieved due to the fact that the hearth burner contains gas manifolds installed in the air supply channel at the entrance to the tunnel and made in the form of pipes with two rows of alternating and opposite holes on their generators, and the axis of the holes in the rows of one collector have their angle of inclination, and the axes that are counter-directed with the same angle of inclination are shifted by the step between them.

The correct alternation of openings of two types within the collector and the affiliation of opposite openings of different collectors to opposite types allows increasing the efficiency and uniformity of heat release along the length due to the integration of convective flows behind openings of various types and a significant increase in the turbulent component of mass transfer due to the significant increasing velocity gradient across the width and depth of the tunnel.

The analysis of scientific, technical and patent literature showed that well-known technical solutions having features

VI

u with

ate with

similar to the features that distinguish the proposed solution from the prototype, not found. The proposed technical solution has significant differences.

Figure 1 shows a cross section of a device; figure 2 is a section aa in figure 1; in Fig.3 is a section bB in Fig.2; figure 4 is a section bb in figure 2; figure 5 is a view along arrow G in figure 1.

The hearth burner contains a tunnel 1, an air supply channel 2, and gas manifolds 3 with openings of two kinds on the side surface. Holes 4 of the first type, for example (aa), and holes 5 of the second type (aa). The openings of two types are made in a correctly alternating order within the collector, and the opposite holes of the various collectors belong to different types.

Such a solution makes it possible to significantly intensify the displacement process and, therefore, to increase the completeness of combustion in the diffusion process.

Research conducted in the Laboratory of Gas and Gas Dynamics and Combustion, in

a wide range of changes in geometric and operating parameters, 30, p 1.0-2.65, 01-0.1, t-0.098.-1.5, a - ± (40-90 °) and a ± (40- 90 °) showed that with increasing (aa), the mixing efficiency increases.

Here g

Gi

. - Pi -a-d. Gi + G2 P / b, and A

N

where a is the angle of attack of the jets; G is the mass flow rate; p is the density; d is the diameter; t is the step;

A is the characteristic flow size. Indices: 1 - transverse jets; 2 - carrying flow; cm is a mixture;

I - the first view;

II - the second type;

+ - towards the exit from the tunnel;

- - towards the entrance to the tunnel.

Claims (1)

SUMMARY OF THE INVENTION A hearth burner comprising gas manifolds installed in an air supply channel at the entrance to the tunnel and made in the form of pipes with two rows of alternating and opposite openings on their generators, characterized in that, in order to increase economy by increasing the completeness of fuel combustion, the axis of the holes in the rows of one collector has its own angle of inclination, and counter-directed holes with the same angle of inclination of the axis are offset by the step between them. Fig. G ФЦГЗ St / df fig4 %