SU1508050A1 - Burner - Google Patents

Abstract

The invention allows to expand the range of regulation of the heat output of the burner. For this, the character of the interaction of the flow of the spraying agent with the annular flow of fuel is affected by changing the intensity of the twist of the flow of the spraying agent, giving it a value inversely proportional to the heat output of the burner. The burner for the implementation of the method contains an air channel 5 with a blade swirl 6, a fuel oil pipe 1 with a confusing nozzle 2 and a central pipe 3, in the output section of which is placed a swirl 4. The burner is equipped with a confuser-diffuser insert 7. The fuel enters through the fuel oil pipe 1 into the confusion nozzle 2. By moving the swirler 4, the intensity of the twist of the spraying agent is affected. 1 il.

Description

ate

about

00

about ate

The invention relates to energy and can be used in burners for burning sprayed liquids.

The purpose of the invention is to expand the range of control of the heat output of the burner.

The drawing shows the burner. lengthwise cut.

The burner contains a fuel oil pipe 1 with a confused outlet nozzle 2, a central pipe 3 placed therein for supplying a spraying agent with a regulating device 4 movable in axial direction and a peripheral air channel 5 with a blade swirler 6. The burner also has a confusor-diffuser insert 7. In this case, the fuel oil pipe 1 with its output nozzle 2 is inserted into the confusing section of the insert 7. The output section 9 at the central pipe 3 is made confused, and the regulating device 4 is in the form of a swirler.

The burner works as follows.

Fuel with a pressure much lower than the pressure of the spraying agent flowing through the central pipe 3 is fed to the confuser nozzles 2 of the fuel oil pipe 1. Through the movement of the swirler 4, the intensity of the twist of the spraying agent is affected. With a minimum intensity of twist, the narrow jet of the spraying agent intensively ejects fuel from confused nozzle 2 of the fuel oil pipe 1, ensuring its maximum consumption. If necessary, the reduction in heat output of the burner is increased, for example, by moving the swirler 4 to the confluent 8 section 9 of the pipe 3, 9. Moreover, due to the narrowing of the bore section as the swirler moves, a smaller part of the air passes by the flow channels on the swirler 4, which leads to an increase in the intensity of the twist.

With an increase in the intensity of the twist, the angle of jet opening increases, and the velocity profile is converted with a shift of the maximum velocity to the periphery, as well as the pressure maxima in the jet. Since the output section of the central pipe 3 is located in the confusing nozzle 2 from the fuel oil pipe 1, as the intensity of the twist increases, the ejecting capacity of the jet decreases and eventually the burner is closed until the fuel is completely turned off.

Offset with spraying agent

 the fuel from the confuser nozzle 2 enters the confused part of the insert 7. In this area the mixture of fuel with the atomizing air actively interacts with the primary air, ejecting it.

5 In the case of a continuous flow mode of outflow of spraying air, the ejection coefficient is maximum; as the twist increases, the degree of ejection decreases to complete blockage of the flow.

The intensity of mixing the air-fuel mixture with the primary air also decreases with increasing twist and the mixture formation is transferred to the furnace. The presence of the diffuser section in the insert 7 allows the hydraulic resistance of the burner to be reduced by the fan air, which contributes to the expansion of the range of thermal power control at lower energy costs.

0

thirty

Claims (1)

Invention Formula A burner containing a fuel oil pipe with a confused outlet nozzle, a central pipe located therein for supplying a spraying agent with an axially movable regulating device and a peripheral annular air channel with a blade swirler, so as to extend the range regulating the heat power of the goorlki, it additionally contains a confused-diffuser insert, with the fuel oil pipe being its output nozzle inserted into the confusing part of the insert, the output section th pipe is made confused, and the regulating device is in the form of a swirler.