CN-121977209-A - Multi-channel low-nitrogen sectional combustion radiant tube burner

CN121977209ACN 121977209 ACN121977209 ACN 121977209ACN-121977209-A

Abstract

A multi-channel low-nitrogen sectional combustion radiant tube burner comprises a burner shell, a radiant tube, a flame inner tube, a primary heat exchanger, a secondary heat exchanger, a front end fixing piece, a smoke outlet, a combustion air inlet, a fuel gas supply mechanism and an ignition device, wherein the front end fixing piece and the rear end fixing piece are respectively fixed at openings of the front side and the rear side of the burner shell, the secondary heat exchanger is arranged in the burner shell, a primary heat exchanger air conduit is embedded in the secondary heat exchanger, the primary heat exchanger air conduit extends outwards from the rear end fixing piece, the primary heat exchanger is wrapped outside the primary heat exchanger air conduit, the outwards extending end of the primary heat exchanger is communicated with the flame inner tube, one end of the radiant tube is fixed on one side of the front end fixing piece, and the primary heat exchanger, the primary heat exchanger air conduit and the flame inner tube are respectively arranged in the radiant tube.

Inventors

Hu Jiashuang

Assignees

佛山市精燃机电设备有限公司

Dates

Publication Date: 20260505
Application Date: 20260402

Claims (10)

1. The multi-channel low-nitrogen sectional combustion radiant tube burner comprises a burner shell, a radiant tube, a flame inner tube, a primary heat exchanger, a secondary heat exchanger, a front end fixing piece, a smoke outlet, a combustion air inlet, a fuel gas supply mechanism and an ignition device, and is characterized in that the front end fixing piece and the rear end fixing piece are fixedly arranged at openings of the front side and the rear side of the burner shell respectively, the secondary heat exchanger is arranged in the burner shell, the primary heat exchanger air conduit is embedded in the secondary heat exchanger, the primary heat exchanger air conduit extends outwards from the rear end fixing piece, the primary heat exchanger is wrapped outside the primary heat exchanger air conduit, the outwards extending end of the primary heat exchanger is communicated with the flame inner tube, one end of the radiant tube is fixed at one side of the front end fixing piece, and the primary heat exchanger air conduit and the flame inner tube are respectively arranged in the radiant tube; The other end of the front end fixing piece is provided with a rear end fixing piece, one end of the gas supply mechanism is fixed on the rear end fixing piece, one side adjacent to the gas supply mechanism is provided with the ignition device, the gas supply mechanism extends to the end of the primary heat exchanger, the ignition device is arranged in parallel with the gas supply mechanism, and one end of the ignition device is fixed on the rear end fixing piece; The smoke outlet and the combustion air inlet are respectively arranged outside the burner housing, and are communicated with the secondary heat exchanger, and the combustion air inlet is communicated with the burner housing.
2. A multi-channel low nitrogen staged combustion radiant tube burner as in claim 1, wherein: The front end fixing piece and the rear end fixing piece are arranged on two sides of the burner shell; The front end fixing piece is used for fixing the radiant tube. The rear end fixing piece is used for fixing the gas supply mechanism and the ignition device.
3. A multi-channel low nitrogen staged combustion radiant tube burner as in claim 1, wherein: the primary heat exchanger air conduit is fixed in the primary heat exchanger; The inside and outside both sides of one-level heat exchanger are equipped with a plurality of heat transfer fin respectively, a plurality of heat transfer fin outside the one-level heat exchanger is towards the radiant tube, a plurality of heat transfer fin of measuring in the one-level heat exchanger is towards one-level heat exchanger air duct.
4. A multi-channel low nitrogen staged combustion radiant tube burner as in claim 1, wherein: the secondary heat exchanger is formed by combining a plurality of baffle plates and a plurality of heat exchange tubes, and the heat exchange tubes of the secondary heat exchanger are sequentially arranged along a plurality of circular rings and traverse the whole secondary heat exchanger; And a gap is arranged between the secondary heat exchanger and the primary heat exchanger.
5. A multi-channel low nitrogen staged combustion radiant tube burner as in claim 1, wherein: a gap is arranged between the air conduit of the primary heat exchanger and the primary heat exchanger.
6. A multi-channel low nitrogen staged combustion radiant tube burner as in claim 1, wherein: The smoke outlet is embedded into one end of the burner shell and is communicated with the secondary heat exchanger; the combustion air inlet is arranged at the other end of the burner shell and is communicated with a gap between the burner shell and the secondary heat exchanger.
7. A multi-channel low nitrogen staged combustion radiant tube burner as in claim 1, wherein: The gas supply mechanism comprises a gas distribution device, a gas inner pipe, a gas outer pipe, a mixed combustion chamber and a guide flame cone; one end of the fuel gas supply mechanism penetrates through the rear end fixing piece to extend outwards.
8. A multi-channel low nitrogen staged combustion radiant tube burner as in claim 7, wherein: the ignition electrodes of the ignition device extend across the lead flame cone and into the mixing combustion chamber.
9. A multi-channel low nitrogen staged combustion radiant tube burner as in claim 1, wherein: The radiation pipe transmits heat generated by the burner to an external space in a radiation mode; The flue gas is sprayed out of the mixing combustion chamber and enters the flame inner pipe; Under the guidance of the flame inner pipe, the flue gas is deflected to enter the radiant tube, the high-temperature flue gas after radiation heat transfer enters the burner from the first gap between the radiant tube and the primary heat exchanger, and the high-temperature flue gas transfers heat to combustion air through the pipe wall of the primary heat exchanger, so that the temperature of the flue gas is reduced; And flue gas coming out of the first gap between the radiant tube and the primary heat exchanger enters the secondary heat exchanger, heat is transferred to combustion air through the heat exchange tube wall, and finally, the flue gas is discharged into the atmosphere through the smoke outlet.
10. A multi-channel low nitrogen staged combustion radiant tube burner as in claim 1, wherein: Combustion air enters a second gap between the burner shell and the secondary heat exchanger, heat from the secondary heat exchanger is absorbed in the second gap, and the temperature rises; combustion air coming out of a second gap between the burner shell and the second heat exchanger sequentially enters the second heat exchanger and the first heat exchanger, absorbs heat transferred from high-temperature flue gas, and further rises in temperature, and enters the mixed combustion chamber to provide combustion supporting for fuel gas.

Description

Multi-channel low-nitrogen sectional combustion radiant tube burner Technical Field The invention relates to a burner, in particular to a multi-channel low-nitrogen sectional combustion radiant tube burner. Background The burner is a common equipment component in the industrial field, particularly has wide application in combustion technology, heating equipment or industrial furnaces, and the core component of the combustion device is used for mixing fuel (such as natural gas, liquefied gas, diesel oil, heavy oil and the like) and air according to a certain proportion, and initiating combustion through the ignition device to generate high-temperature flame or heat energy for heating, smelting, drying and other technological processes. NOx is a collection of various nitrogen oxides, and is an important factor for causing acid rain and haze. Along with the improvement of the national requirements on energy conservation and environmental protection, the energy conservation and environmental protection technology is continuously developed, the atmospheric environmental pollution is continuously and deeply treated, the NOx emission requirements of various burners are increasingly strict, so that the combustion performance requirements of the burners are also continuously improved, and the comprehensive requirements of combustion efficiency, index energy consumption, low nitrogen environmental protection and the like are improved from the simple combustion efficiency requirements. The radiant tube burner integrates the burner and the heat exchanger, the combustion air enters the burner and then exchanges heat with high-temperature flue gas through the heat exchanger matched with the burner, and the preheated combustion air is mixed with fuel gas and ignited for combustion, so that heat recovery is realized, the energy consumption of a system index can be effectively reduced, but the temperature of the combustion air rises after the combustion air is preheated, so that the combustion temperature of the burner rises, and the emission concentration of nitrogen oxides in the flue gas is greatly increased. Disclosure of Invention Aiming at the technical defects in the background technology, the invention provides a multi-channel low-nitrogen sectional combustion radiant tube burner, which solves the technical problems and meets the actual requirements, and the specific technical scheme is as follows: A multi-channel low-nitrogen sectional combustion radiant tube burner comprises a burner shell, a radiant tube, a flame inner tube, a primary heat exchanger, a secondary heat exchanger, a front end fixing piece, a smoke outlet, a combustion air inlet, a gas supply mechanism and a gas supply mechanism, wherein the front end fixing piece and the rear end fixing piece are respectively fixed at openings on the front side and the rear side of the burner shell, the secondary heat exchanger is arranged in the burner shell, an air conduit of the primary heat exchanger is embedded in the secondary heat exchanger, the air conduit of the primary heat exchanger extends outwards from the rear end fixing piece, the first heat exchanger is wrapped outside the air conduit of the primary heat exchanger, the outwards extending end of the primary heat exchanger is communicated with the flame inner tube, one end of the radiant tube is fixed at one side of the front end fixing piece, the air conduit of the primary heat exchanger and the flame inner tube are respectively arranged in the radiant tube, the other end of the front end fixing piece is provided with the rear end fixing piece, one end of the gas supply mechanism is fixed at the rear end fixing piece, the gas supply mechanism is arranged adjacent to the gas supply mechanism, the side of the gas supply mechanism is arranged at one side of the combustion air inlet and the combustion air supply mechanism is arranged at the other side of the burner shell, the combustion air inlet is communicated with the combustion air inlet, the combustion air supply mechanism is arranged at the end of the combustion air inlet, and the combustion air supply mechanism is communicated with the combustion air inlet, and the combustion air supply mechanism is arranged at the combustion air inlet respectively. The front end fixing piece and the rear end fixing piece are arranged on two sides of the burner shell, and the radiation tube is fixed by the front end fixing piece. The rear end fixing piece is used for fixing the gas supply mechanism and the ignition device. The air guide pipe of the primary heat exchanger is fixed in the primary heat exchanger, a plurality of heat exchange fins are respectively arranged on the inner side and the outer side of the primary heat exchanger, the plurality of heat exchange fins on the outer side of the primary heat exchanger face the radiant tube, and the plurality of heat exchange fins measured in the primary heat exchanger face the air guide pipe of the primary heat exc