RU20955U1 - BURNER - Google Patents

Abstract

1. The burner device includes a front device and a heat pipe installed in the body of the burner device with the formation of an annular gap in communication with a compressed air source, for example, a fan, the front device includes a gas supply manifold, an annular mixing channel, an ignition-signaling device, while an annular the mixing channel at the inlet is in communication with the air supply cavity of the annular gap, made confuser-diffuser with a central cylindrical section in which are located nozzles in communication with the gas supply manifold, flute-type flame stabilizers and an anti-flaming grid are installed at the outlet of the frontal device, the flame tube is equipped with nozzles arranged in rows and oriented chordally relative to its longitudinal axis. 2. The burner device according to claim 1, characterized in that the axis of the nozzles in communication with the gas supply manifold are oriented chordally and at an angle to the axis of the burner device. The burner device according to claim 1 or 2, characterized in that the ignition-signaling device is installed in a tube located along the axis of the front device and in communication with the air supply cavity of the annular gap.

Description

BURNER

The utility model relates to the field of energy, and in particular, to burner devices for burning gaseous fuels in various heat engineering devices, including in heat exchangers with different heat output.

Known gas burner (and.with. No. 1242684, F 23D14 / 44, publ. 08.03.86) containing a combustion chamber, a gas supply pipe with a nozzle nozzle at the end, having a fuel manifold and a system of radial openings, an air supply pipe, an igniter.

Known gas burner (RF patent No. 2100699, F 23 D 14/02, 14/82, publ. 27.12.97X, which is the closest in technical essence and adopted as a prototype, containing a combustion chamber with a nozzle nozzle in front of it, installed with an annular gap in the air supply pipe, the nozzle nozzle channel is made annular with a tapering inlet, cylindrical central and expanding output parts, a central air supply tube is installed along the axis of the nozzle nozzle, inside of which the ignitor is located, at the outlet of the nozzle channel ovlena grid-angiflamming.

The disadvantage of this gas burner is the high temperature at the outlet of the burner, which reduces the resource and reliability when using the burner in heat exchangers with a close proximity of the burner to the channels of the heat exchanger.

The technical result, which the proposed utility model is aimed at, is to increase the reliability of the burner device when used in heat exchangers, as well as to increase its environmental characteristics.

F 23 D 14/02, 14/82

goo (

The burner device includes a front device and a heat pipe installed in the housing with the formation of an annular gap in communication with a high-pressure air source, front 01806 the device includes a gas supply manifold, an annular mixing channel, an ignition-signaling device, an annular mixing channel at the inlet is in communication with the air supply cavity of the annular the gap is made confuser-diffuser with a central cylindrical section, in which the nozzles are located, communicated with the gas supply manifold, in at the exit of the front-mounted device, flame stabilizers of flame grooves and an anti-flammish mesh are installed, the heat coarse is equipped with nozzles arranged in rows and oriented chordally relative to its longitudinal axis. The ignition-signaling device is installed in a tube located along the axis of the front device and in communication with the air supply cavity of the annular gap. The axis of the nozzles in communication with the gas supply manifold is oriented chordally and at an angle to the axis of the burner device.

In FIG. 1 shows a longitudinal section through a burner device.

The burner device includes a housing 1, a frontal device and a heat pipe 2, The front device and a heat pipe 2 are installed in the housing 1 with the formation of an annular gap 3, in communication with a high pressure air source, for example, a fan. The front-end device includes a gas supply manifold 4, an annular mixing channel 5, an ignition-signaling device 6, while the annular mixing channel 5 at the inlet is in communication with the air supply cavity of the annular gap 3 and is made confuser-diffuser with a central cylindrical section 7 in which nozzles 8 are located communicated with the gas supply manifold 4. The axis of the nozzles 8 are oriented chordally and at an angle to the axis of the burner device, which contributes to the intensification of gas mixing

supplied through nozzles 8 with air passing through an annular mixing channel 5.

At the output of the front-mounted device, flame stabilizers 9 of the same pubic type and anti-flaming grid 10 are installed. The flame tube 2 is equipped with nozzles 11 arranged in rows and oriented chordally relative to its longitudinal axis, which contributes to intensive mixing of the air coming from the annular gap 3 with hot products of combustion of heat pipes 2. The external signaling device 6 is installed in the tube 12 located along the axis of the front device and in communication with the air supply cavity of the annular gap 3, middle holes 13 b tube 12.

The burner operates as follows.

Air from a high-pressure source, for example, a fan, enters the burner device into the air-supply annular gap 3. 13 The burner device supplies fuel - natural gas, which through the gearbox and valve enters the ignition-warning device 6, and at the same time the spark plug is turned on. The air in the ignition device 6 enters through a tube 12 in communication with the air supply cavity of the gap 3. The gas-air mixture from the spark discharge ignites and a flame is formed. The flame sensor sends a signal to start the pilot light and to open the gas supply valve (not shown in FIG.) To the burner device. After the gas enters the frontal device through the annular mixing channel 5, in which the gas is mixed with air, the main air-gas mixture ignites and burns in the flame tube 2. The burner device provides efficient gas combustion with a low output of harmful products of combustion into the atmosphere due to design features burner device. A burner device including a frontal device containing a gas supply manifold 3, an annular mixing

 / fS

channel 5, ignition-signaling device 6, and flame tube 2 with nozzles 11 for supplying air arranged in rows. The air entering the air supply cavity of the annular gap 3 is distributed into three flows. The first flow along the annular gap 3 enters the flame tube 2 through the nozzles 11 into the combustion zone. The second air stream through the annular mixing channel 5 of variable cross-section enters the flame tube 2 through the anti-flaming grid 10. The air stream passing through the narrowing inlet of the channel 5 is accelerated. In the cylindrical, central part 7 of channel 5, where the flow rate is greatest, gaseous fuel is supplied through the supply manifold of gas 4 and the nozzle system 8. The nozzles 8 are chordal, i.e., at an angle to the axis of the burner device, which creates an additional twist of the gas flow, improves the mixing of gas with air in the annular mixing channel 5. Further, the gas-air mixture passing through the expanding part of the channel 5 enters the heat the pipe 2 of the burner device. The gas-air mixture thus prepared is ignited, forming a combustion zone. The decrease in the flow rate of the gas-air mixture in the expanding outlet of the mixing channel 5 and the presence of a flute stabilizer of the flame 9 at the output of the front-end device exclude the ablation of the flame. The third air stream through the central air supply pipe 12 enters the ignition-signaling device 6, and part of it into the heat pipe 2. This air stream, passing through the combustion zone, reduces the maximum flame temperature, which mainly affects the formation of nitrogen oxides during combustion . The supply of secondary air in the center through the air supply tube 12 and to the end of the flame through the annular gap 3 through the nozzles 11 contributes to the complete burning of carbon monoxide. In addition, the air passing through the annular gap 3 cools the walls of the flame tube 2, protecting them from overheating. The presence at the exit of the front of the device flame stabilizers 9 eliminates the possibility

toof / t f

failure and breakthrough of the flame, which increases the reliability of the burner. The nozzles 11 of the flame tube 2 are oriented chordally relative to its longitudinal axis, which contributes to intensive mixing of the air coming from the annular gap 3 with hot products of combustion in the flame tube 2. Through the first row of nozzles 11, air from the channel 3 is fed into the combustion zone, where intensive mixing occurs it with combustion products and depletion of the mixture to an excess air coefficient of 1.3, at which the emission of harmful NOX combustion products. CO and HC is the optimal value. The subsequent rows of nozzles 11 direct air from the channel 3 into the mixing zone of the flame tube 2 to create a short temperature field at the inlet temperature of the inlet to the heat exchanger. The organization of the combustion process in a burner device with a high completeness of combustion and a short length increases the reliability and service life of the burner device and heat exchanger.

Thus, the proposed burner device has high reliability when used in heat exchangers, high environmental performance, due to the high completeness of combustion and reduced output of harmful combustion products into the atmosphere, which expands the possibilities of its use.

Claims (3)

1. The burner device includes a front device and a heat pipe installed in the body of the burner device with the formation of an annular gap in communication with a compressed air source, for example, a fan, the front device includes a gas supply manifold, an annular mixing channel, an ignition-signaling device, while an annular the mixing channel at the inlet is in communication with the air supply cavity of the annular gap, made confuser-diffuser with a central cylindrical section in which are located nozzles in communication with the gas supply manifold, flute-type flame stabilizers and an anti-flaming grid are installed at the outlet of the front-end device, the flame tube is equipped with nozzles arranged in rows and oriented chordally relative to its longitudinal axis.  2. The burner device according to claim 1, characterized in that the axis of the nozzles in communication with the gas supply manifold are oriented chordally and at an angle to the axis of the burner device. 3. The burner device according to claim 1 or 2, characterized in that the ignition-signaling device is installed in a tube located along the axis of the front device and in communication with the air supply cavity of the annular gap.