RU1813977C - Furnace - Google Patents

Abstract

Use: for burning fuel in thermal power plants. SUMMARY OF THE INVENTION: A furnace contains coaxially located combustion and afterburners coupled by a funnel, and a gas manifold with a distribution unit. The funnel is perforated, and the dispensing unit in the form of ring distributors equipped with nozzles located in several horizontal channels and with axes tangential to their conditional circumference, and the projections of the nozzle axes located in different channels on the cross-section plane of the furnace the shape of the polygon, and the axis of the nozzles of each channel are located in the same plane and, for the two closest nozzles lie on one straight line, and for the two closest nozzles in different Russes are differently directed lg 4 ill. & Ј

Description

The invention relates to the field of energy and can be used in the development of advanced equipment.

The purpose of the invention is to increase the intensive characteristics of the process in variable modes.

In FIG. 1 shows a schematic diagram of a furnace; on fi. 2 is a section AA in FIG. 1; in FIG. 3 - section bb in figure 1; in FIG. 4 is a section CC in FIG.

The furnace contains a coaxially located combustion chamber 1 and a afterburner 2, a perforated funnel 3, a gas manifold 4, and annular distributors 5 provided with nozzles 6. The axis of the nozzles 6 of each of the distributors touch their nominal circumference. The projections of the axes of the nozzles 6, located in different beds, onto the plane of the cross section of the furnace are the sides of the described polygon (Fig. 2), the axis of the nozzles 6 of each channel are located in the same plane and for the two closest nozzles lie on one straight line, and for two the closest nozzles are in different directions in different directions (Fig. 3.4).

The furnace works as follows.

Air enters the combustion chamber 1 and through the perforated funnel 3 into the afterburning chamber 2. Gas enters the combustion chamber 1 and through the manifold 4 into the annular distributors 5 and through nozzles 6 into the afterburning chamber 2, where it is effectively mixed with air and provides high efficiency in the diffusion process.

Changing the operation mode of the furnace leads to a change in the penetration depth of the jets in the plane of the trajectory and. trace00

S o h VI

However, the impact efficiency, but does not lead to a change in the penetration depth along the normal to the current lines and, therefore, the quality of mixing, since

N

p-I2 pz - P2

n

where1

- bias quality parameter;

h is the penetration depth of the jets normal to the current lines;

A is a characteristic geometric parameter;

indexes 2 - restriction on the front boundary of the jets; 3 - restriction on convective mass transfer ..

Studies conducted in the laboratory of gas and gas dynamics and combustion in a wide range of changes in geometric and operational parameters: G 0 -U, 80; p 1., 65; d 0.01 -J.10; t 0, 784; dy 0,, 85 .;

-

61

Gi + g2

 pi.

, ST -s ----

rem

 h

- T

d. AND

 -.

.

Ok

A uk

where G is the mass flow rate; d is the diameter; t is the step; p is the density; A - characteristic size

flow; indices: 1 - transverse jets; 2 - carrying flow; see - mixture, y - conditional; k is the camera

showed that the proposed device allows to obtain a stable value of the quality of mixing in variable modes in the layout of the chamber with annular distributors.

Claims (1)

The claims A furnace containing coaxially located combustion and afterburning chambers is interconnected by a funnel, and a gas manifold with a distribution unit, which means that, in order to increase the intensive characteristics of the process in variable modes, the funnel is made in the form of annular distribution lines equipped with nozzles located in several horizontal channels and with axes tangential to their conditional circumference, and the projections of the axes of nozzles located in different channels on the plane of the cross section of the top ki have the shape of a polygon, circumscribed around, a conditional circle, and the axis of the nozzles of each channel are located in the same plane and for the two closest nozzles lie on one straight line, and for the two nearest nozzles in different Russes they are multidirectional. 6- in Figz Cabbage soup Mr. Ts