CN215489691U

CN215489691U - Air staged combustion heat accumulating type low-nitrogen high-speed burner device

Info

Publication number: CN215489691U
Application number: CN202121283249.XU
Authority: CN
Inventors: 林燕强; 林士洪; 陈洪海; 林益志; 郁喜祥
Original assignee: Jiangyin Lantian Kiln Co ltd
Current assignee: Jiangyin Lantian Kiln Co ltd
Priority date: 2021-06-09
Filing date: 2021-06-09
Publication date: 2022-01-11
Anticipated expiration: 2031-06-09

Abstract

The utility modelThe air staged combustion heat accumulating type low-nitrogen high-speed burner device comprises a heat accumulating box body, a primary gas nozzle, an air-fuel mixed split fluid, a front burner block, a combustion chamber and a secondary combustion chamber; a primary gas nozzle is arranged at the lower part in the heat storage box body, a combustion chamber and a secondary combustion chamber are sequentially arranged in the front burner block, the combustion chamber is communicated with the primary gas nozzle, and the secondary combustion chamber is communicated with the combustion chamber; the combustion chamber is arranged in the air-fuel mixture split-flow body, and a plurality of primary air channels are arranged in the air-fuel mixture split-flow body and are connected with the combustion chamber and the heat storage box body; the inner wall of the secondary combustion chamber is provided with a plurality of gas channels which are uniformly distributed in a circle, one end of each gas channel is communicated with the combustion chamber, and the other end of each gas channel forms a plurality of small nozzles. The utility model effectively reduces NO_XThe discharge of the high-speed burner and the shape of the flame of the high-speed burner are ensured to be unchanged, the heating quality is obviously improved, the production rate is improved, the fuel consumption is reduced, and the highest temperature of the flame is reduced.

Description

Air staged combustion heat accumulating type low-nitrogen high-speed burner device

Technical Field

The utility model relates to the technical field of heat accumulating type combustion, in particular to an air staged combustion heat accumulating type low-nitrogen high-speed burner device.

Background

The regenerative burner is a combustion device which takes a ceramic honeycomb body or ceramic balls as a heat accumulator to efficiently recover the waste heat of flue gas (the temperature of the flue gas is reduced to about 150 ℃), preheat the combustion air or coal gas to about 1000 ℃, and has the functions of supplying, igniting, burning, organizing flame and the like to the coal gas and the combustion air. Although the burner has certain advantages in energy conservation, environmental protection and control, the burner also has a plurality of problems: due to flame temperature and NO_XThe amount of generated is exponential, and the conventional regenerative combustion greatly promotes NO_XGeneration of NO_XAs the combustion waste gas, ozone layer can be destroyed, acid rain is caused, strong stimulation is generated to human body, lung diseases are caused, and the like, and the environmental pollution is greatly controlled.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects and provide an air staged combustion heat accumulating type low-nitrogen high-speed burner device for effectively reducing NO_XThe discharge of the high-speed burner and the shape of the flame of the high-speed burner are ensured to be unchanged.

The purpose of the utility model is realized as follows:

an air staged combustion heat accumulating type low-nitrogen high-speed burner device comprises a heat accumulating box body, a primary gas nozzle, an air-fuel mixture split-flow body, a front burner block, a combustion chamber and a secondary combustion chamber; one end of the heat storage box body is connected with an air inlet, a primary gas nozzle is arranged at the lower part in the heat storage box body and connected with a gas pipe, one end of the gas pipe is a gas inlet, the other end of the gas pipe is arranged in a front burner block, a combustion chamber and a secondary combustion chamber are sequentially arranged in the front burner block, the combustion chamber is communicated with the primary gas nozzle, and the secondary combustion chamber is communicated with the combustion chamber; the combustion chamber is arranged in the air-fuel mixture split-flow body, and a plurality of primary air channels are arranged in the air-fuel mixture split-flow body and are connected with the combustion chamber and the heat storage box body; the inner wall of the secondary combustion chamber is provided with a plurality of gas channels which are uniformly distributed in a circle, and one end of each gas channel is communicated with the combustion chamber.

The utility model provides an air staged combustion heat accumulation formula low nitrogen high speed burner device, still be equipped with the secondary wind channel in the air-fuel mixture reposition of redundant personnel, the secondary wind channel sets up the marginal round at the air-fuel mixture reposition of redundant personnel, cup joints between empty box and preceding burner block.

The utility model provides an air staged combustion heat accumulation formula low nitrogen high-speed burner device, the outer fringe at secondary air duct both ends evenly is provided with a plurality of wind groove, and the one end and the heat accumulation box intercommunication of wind groove, the other end and postcombustion room intercommunication.

The utility model provides an air staged combustion heat accumulation formula low nitrogen high-speed burner device, the afterburner is the toper horn mouth structure.

Compared with the prior art, the utility model has the beneficial effects that:

according to the utility model, the primary air channel and the secondary air channel are arranged in the air-fuel mixture split-flow body, so that air is supplied to the combustion chamber and the secondary combustion chamber in a grading manner, part of air and fuel gas are mixed in the combustion chamber to form low-oxygen combustion, the flame temperature of the fuel in the initial combustion process can be effectively reduced, the formation of nitrogen oxides is inhibited, and the emission of NOx is greatly reduced; the gas nozzle of the secondary combustion chamber is changed into the centerThe nozzle and a group of small nozzles surrounding the central nozzle enlarge the contact area of the air jet flow and the smoke in the furnace, increase the entrainment of the air jet flow to the smoke in the furnace, reduce the oxygen concentration in the air jet flow, and delay the mixing of the air and the fuel gas by enlarging the distance between the air nozzles, thereby reducing the highest temperature of flame, and effectively reducing NO_XThe discharge of the high-speed burner and the shape of the flame of the high-speed burner are ensured to be unchanged.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic cross-sectional view of an air-fuel mixture split fluid of the present invention;

FIG. 3 is a schematic cross-sectional view of a combustor of the present invention.

In the figure:

the device comprises a heat storage box body 1, a primary gas nozzle 2, an air-fuel mixture split-flow body 3, a front burner block 4, a combustion chamber 5, a secondary combustion chamber 6, an air inlet 7, a gas inlet 8, a primary air channel 9 and a secondary air channel 10.

Detailed Description

For a better understanding of the technical aspects of the present invention, reference will now be made in detail to the accompanying drawings. It should be understood that the following specific examples are not intended to limit the embodiments of the present invention, but are merely exemplary embodiments of the present invention. It should be noted that the description of the positional relationship of the components, such as the component a is located above the component B, is based on the description of the relative positions of the components in the drawings, and is not intended to limit the actual positional relationship of the components.

Example 1:

referring to fig. 1-3, fig. 1 is a schematic structural diagram of an air staged combustion heat accumulating type low-nitrogen high-speed burner device. As shown in the figure, the utility model relates to an air staged combustion heat accumulating type low-nitrogen high-speed burner device, which comprises a heat accumulating box body 1, a primary gas nozzle 2, an air-fuel mixture split-flow body 3, a front burner block 4, a combustion chamber 5 and a secondary combustion chamber 6;

the one end of heat accumulation box 1 is connected with air inlet 7, lower part in the heat accumulation box 1 is equipped with one-level gas nozzle 2, gas pipe is connected to one-level gas nozzle 2, and the one end of gas pipe is gas import 8, and the other end setting is in preceding burner block 4, be equipped with combustion chamber 5 and postcombustion chamber 6 in the preceding burner block 4 in proper order, combustion chamber 5 and one-level gas nozzle 2 intercommunication, postcombustion chamber 6 and combustion chamber 5 intercommunication.

The combustion chamber 5 is arranged in the air-fuel mixture split-flow body 3, and a plurality of primary air channels 9 are arranged in the air-fuel mixture split-flow body 3 and connected with the combustion chamber 5 and the heat storage box body 1 to introduce air.

Still be equipped with secondary air duct 10 in the air-fuel mixture reposition of redundant personnel body 3, secondary air duct 10 sets up the marginal round at air-fuel mixture reposition of redundant personnel body 3, cup joints between empty box and preceding burner block 4, the outer fringe at secondary air duct 10 both ends evenly is provided with a plurality of wind groove, the one end and the thermal storage box 1 intercommunication of wind groove, the other end and postcombustion chamber 6 intercommunication, postcombustion chamber 6 is the toper horn mouth structure.

The inner wall of the secondary combustion chamber 6 is provided with a plurality of gas channels which are uniformly distributed in a circle, one end of each gas channel is communicated with the combustion chamber 5, and one end of the other end, which is close to the furnace body, forms a plurality of small nozzles to form a high-speed combustion nozzle.

The working principle is as follows:

through set up air flue and secondary air flue in the mixed reposition of redundant personnel of air-fuel, realized supplying with air to combustion chamber and postcombustion room in grades, make partial air mix with the gas and form the low oxygen combustion in the combustion chamber, can effectual reduction fuel initial stage flame temperature in the combustion process, restrain nitrogen oxide's formation, greatly reduce NOx's emission, simultaneously through being provided with the secondary air flue, partial air gets into the postcombustion room through the secondary air flue, carry out the postcombustion with the flue gas of incomplete combustion in the combustion chamber, the air passes through the back and forms the secondary air flue and gets into in the postcombustion room of flat flame baked brick, with the postcombustion room cooperation of tubaeform helical structure, make flame keep hugging closely the disc shape of oven to evenly stretching all around, show and improve heating quality, productivity ratio and reduction fuel consumption.

The gas nozzle of the secondary combustion chamber is changed into a central nozzle and a group of small nozzles surrounding the central nozzle, so that the contact area between the air jet and the smoke in the furnace is enlarged, the entrainment of the air jet to the smoke in the furnace is increased, the oxygen concentration in the air jet is reduced, and the mixing of the air and the gas is delayed by increasing the distance between the air nozzles, so that the highest temperature of flame is reduced; the air is preheated to 750 ℃, the flame highest temperature of a common high-speed burner is higher than 2000 ℃, and the flame highest temperature of the heat accumulating type burner after staged combustion is only about 1400 ℃.

The characteristics of above structure are:

air is directly sprayed out from the central area of the burner at high speed, so that the flue gas in the furnace is promoted to be recycled; the primary gas is sprayed out along the inner surface of the burner block channel, the secondary gas is directly sprayed into the furnace at the end surface of the burner block channel, and the flame shape can be adapted to the inner shape of the furnace by adjusting the proportion of the primary gas and the secondary gas.

In conclusion, the heat accumulating type high-speed burner comprehensively adopts the technical means of staged combustion and flue gas recirculation, and compared with the traditional low-NOx burner, the low-NOx high-temperature air burner has basically similar nozzle structure, but has higher jet speed and larger nozzle distance so as to ensure that the position of a mixing point of gas and air is in a lower oxygen concentration range, because the temperature of preheated air is far higher than the temperature of ignited gas, the stability of ignition and combustion of the gas is ensured.

The above is only a specific application example of the present invention, and the protection scope of the present invention is not limited in any way. All the technical solutions formed by equivalent transformation or equivalent replacement fall within the protection scope of the present invention.

Claims

1. The utility model provides an air staged combustion heat accumulation formula low nitrogen high-speed burner device which characterized in that: the device comprises a heat storage box body (1), a primary gas nozzle (2), an air-fuel mixture flow-splitting body (3), a front burner block (4), a combustion chamber (5) and a secondary combustion chamber (6); one end of the heat storage box body (1) is connected with an air inlet (7), a primary gas nozzle (2) is arranged at the lower part in the heat storage box body (1), the primary gas nozzle (2) is connected with a gas pipe, one end of the gas pipe is a gas inlet (8), the other end of the gas pipe is arranged in a front burner block (4), a combustion chamber (5) and a secondary combustion chamber (6) are sequentially arranged in the front burner block (4), the combustion chamber (5) is communicated with the primary gas nozzle (2), and the secondary combustion chamber (6) is communicated with the combustion chamber (5); the combustion chamber (5) is arranged in the air-fuel mixture split-flow body (3), and a plurality of primary air channels (9) are arranged in the air-fuel mixture split-flow body (3) and are connected with the combustion chamber (5) and the heat storage box body (1); the inner wall of the secondary combustion chamber (6) is provided with a plurality of gas channels which are uniformly distributed in a circle, and one end of each gas channel is communicated with the combustion chamber (5).

2. The air staged combustion regenerative low-nitrogen high-speed burner device as claimed in claim 1, wherein: the air-fuel mixture split-flow body (3) is also internally provided with a secondary air duct (10), and the secondary air duct (10) is arranged at the edge of the air-fuel mixture split-flow body (3) in a circle and is sleeved between the empty box body and the front burner block (4).

3. The air staged combustion regenerative low-nitrogen high-speed burner device as claimed in claim 2, wherein: the outer edges of two ends of the secondary air duct (10) are uniformly provided with a plurality of air grooves, one ends of the air grooves are communicated with the heat storage box body (1), and the other ends of the air grooves are communicated with the secondary combustion chamber (6).

4. The air staged combustion regenerative low-nitrogen high-speed burner device as claimed in claim 1, wherein: the secondary combustion chamber (6) is of a conical bell mouth structure.