CN216591708U

CN216591708U - Instant mixing type combustor

Info

Publication number: CN216591708U
Application number: CN202220066653.XU
Authority: CN
Inventors: 付超; 张虎; 任志恒
Original assignee: Zhongke Zhuoyi Environmental Technology Dongguan Co ltd; Songshan Lake Materials Laboratory
Current assignee: Zhongke Zhuoyi Environmental Technology Dongguan Co ltd; Songshan Lake Materials Laboratory
Priority date: 2022-01-11
Filing date: 2022-01-11
Publication date: 2022-05-24
Anticipated expiration: 2032-01-11

Abstract

The application provides a mix formula combustor promptly belongs to combustor technical field. This formula combustor mixes promptly is including helping gas pipe, combustion tube and spoiler, and the gas pipe that helps is equipped with air intlet, and the gas pipe is equipped with the gas import, and the gas pipe has the end of giving vent to anger that extends to in the gas pipe that helps, and the end of giving vent to anger is formed with the gas nozzle that is located the gas pipe that helps, and the spoiler sets up in the gas pipe that helps, lies in to be formed with the hybrid chamber between nozzle and the spoiler in the gas pipe that helps. The instant mixing type combustor can improve the mixing effect of air and fuel gas and improve the combustion effect of combustible mixed gas.

Description

Instant mixing type combustor

Technical Field

The application relates to the field of combustors, in particular to an instant mixing combustor.

Background

The burner is an important component of the industrial boiler, and the burner burns to provide heat for the industrial boiler so as to meet the requirement of the output steam load of the industrial boiler. At present, the mixing effect of air and gas in a combustor is general, the combustion effect of combustible mixed gas is poor, and the thermal efficiency of an industrial boiler is influenced.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a mix formula combustor promptly to it is relatively poor with the gas mixed effect, the relatively poor problem of combustible mixture gas combustion effect in the combustor to improve.

The embodiment of the application provides a mix formula combustor promptly, mix formula combustor promptly and including helping gas pipe and gas pipe, the gas pipe is equipped with the gas import, and the gas pipe is equipped with air intlet, and the gas pipe has the end of giving vent to anger that extends to in the gas pipe, and the gas outlet end is formed with the gas nozzle that is located in the gas pipe that helps, follows the direction of giving vent to anger of gas nozzle, and the rear side that lies in the gas nozzle in the gas pipe that helps forms there is the hybrid chamber.

In above-mentioned technical scheme, the gas pipe has the end of giving vent to anger that extends to in the combustion-supporting trachea, the gas gets into in the gas pipe by the gas import, the gas sprays the gas in the combustion-supporting trachea via the gas nozzle that the gas pipe was given vent to anger the end, the gas that sprays mixes in the gas cavity of the combustion-supporting trachea that lies in gas nozzle rear side with the air in the combustion-supporting trachea, the gas gets into in the gas pipe from the gas air inlet, because the internal diameter of gas nozzle is less than the gas pipe, lead to the pressure increase of gas in the gas nozzle, gas velocity of motion reduces gradually, when the gas is spouting from the gas nozzle, gas velocity of motion is the highest, gas pressure is minimum.

The gas sprayed from the gas nozzle forms low pressure in the mixing cavity at high speed, so that air is sucked from the air inlet, and the air and the gas form vortex in the mixing cavity to generate combustible mixed gas, thereby improving the mixing effect of the gas and the air.

In some embodiments, the combustion-supporting gas tube has a gas feeding section sleeved on the gas tube, and the gas feeding section is arranged coaxially with the nozzle.

In the technical scheme, the mode of coaxial arrangement is favorable for more uniform mixing of air and fuel gas.

In some embodiments, the combustion-supporting gas pipe is internally provided with a spoiler, the spoiler is arranged in the mixing cavity, and the air inlet is farther away from the spoiler than the gas nozzle along the extension direction of the combustion-supporting gas pipe.

In the technical scheme, the spoiler is arranged in the mixing cavity in the combustion-supporting air pipe, and because the air and the fuel gas form vortex in the mixing cavity, the mixing speed of the air and the fuel gas is gradually reduced, the pressure of the combustible mixed gas generated by the air and the fuel gas is gradually increased, the combustible mixed gas is in a high-pressure state at the moment, the combustible mixed gas is outwards diffused through the spoiler, and the air and the fuel gas can be mixed again through the spoiler, so that the air and the fuel gas are mixed more uniformly.

The position of the air inlet in the extending direction of the combustion-supporting gas pipe is farther away from the mixing cavity than the gas nozzle, so that the mixing cavity at the rear side of the gas nozzle in the combustion-supporting gas pipe is a relatively closed space, and the combustible mixed gas can be conveniently diffused outwards.

In some embodiments, the hybrid combustor further includes a multi-hole air distribution plate connected to the combustion-supporting gas pipe, and the spoiler is located between the gas nozzle and the multi-hole air distribution plate along an extending direction of the combustion-supporting gas pipe.

In the technical scheme, when the combustible mixed gas is gathered to a certain degree near the porous air distribution plate, the combustible mixed gas can be sprayed out from the holes of the porous air distribution plate, the pressure intensity of the combustible mixed gas is lowest, the movement speed is highest, the gas sprayed out from the porous air distribution plate forms low pressure in the rear side of the air distribution plate at high speed, so as to suck the newly mixed combustible mixed gas from the mixing cavity, the previously formed combustible mixed gas forms vortex with the newly formed combustible mixed gas, the previously formed combustible mixed gas is further mixed with the newly formed combustible mixed gas, the previously formed combustible mixed gas and the newly formed combustible mixed gas can be uniformly mixed, and the porous air distribution plate is provided with a plurality of holes, and the combustible mixed gas formed previously and the newly formed combustible mixed gas can form a plurality of vortexes, so that the mixing effect of the air and the fuel gas is improved.

In some embodiments, the porous grid plate includes a first region corresponding to the oxidant gas pipe and a second region located at the periphery of the first region, the first region having a greater concentration of pores than the second region.

In above-mentioned technical scheme, porous air distribution plate has the hole degree of concentration that is greater than the hole degree of concentration that is located the second district of the periphery in porous air distribution plate first district corresponding with the hole degree of concentration in the first district of combustion-supporting trachea, the position department combustible gas gathering degree that first district corresponds in the mixing chamber is greater than the position department combustible gas gathering degree that the second district corresponds in the mixing chamber, the first district of porous air distribution plate is greater than the second district of porous air distribution plate to combustible gas diffusion effect to a certain extent, can make the combustible gas mixture via first district gathering spout with the majority of combustible gas mixture via the second district gathering. The amount of the combustible mixed gas ejected through the first area is larger than that of the combustible mixed gas ejected through the second area, and the combustible mixed gas ejected through the first area is diffused to the combustible mixed gas ejected through the second area, so that the combustible mixed gas ejected through the first area and the combustible mixed gas ejected through the second area can be uniformly mixed.

In some embodiments, the front end of the combustion-supporting gas pipe is provided with a bell mouth, and the porous air distribution plate is arranged at the large end of the bell mouth.

In the above technical scheme, the front end of the combustion-supporting gas pipe is provided with the horn mouth, and the porous air distribution plate is arranged at the large end of the horn mouth, so that the combustible mixed gas can be conveniently diffused to the porous air distribution plate.

In some embodiments, the hybrid combustor comprises a heat-insulating shell, and a gas distribution combustion chamber is formed in the heat-insulating shell; the air supply end of the combustion assisting gas pipe penetrates through the heat-insulating shell, so that a mixing cavity is formed in the heat-insulating shell, and the mixing cavity is communicated with the gas distribution combustion cavity and is positioned on the front side of the gas distribution combustion cavity.

In the technical scheme, the air supply end of the combustion assisting gas pipe is arranged in the heat-insulating shell in a penetrating mode, the mixing cavity and the air distribution combustion cavity are formed in the heat-insulating shell, in other words, the heat-insulating shell is sequentially coated on the air supply end, the mixing cavity and the air distribution combustion cavity in the circumferential direction, so that when combustion is carried out, the heat-insulating shell prevents heat generated by smoke from being conducted into the combustion assisting gas pipe to a certain extent, the overhigh temperature of preheated air in the combustion assisting gas pipe is avoided, and the phenomenon that the porous medium combustor is tempered after the combustion assisting gas is preheated is reduced.

In some embodiments, the gas distribution combustion chamber is provided with an upstream sheet and a downstream sheet in sequence along the flow direction of the gas flow.

In some embodiments, the upstream sheet is a ceramic fiber material and the downstream sheet is a silicon carbide ceramic foam.

In the technical scheme, the downstream sheet is the silicon carbide foam ceramic which is a porous material with a three-dimensional net structure, the material has high thermal conductivity and good thermal conduction effect, partial heat generated by combustion of the combustible mixed gas can be transferred to the non-preheated combustible mixed gas in the low-temperature zone from the high-temperature zone, the combustion rate is improved, and the fuel gas can be completely combusted. The ceramic fiber material is a fibrous light refractory material, is high temperature resistant, has good thermal stability and low thermal conductivity, can isolate the heat generated by the combustible mixed gas in the air distribution cavity, reduces the heat dissipation generated by the combustible mixed gas, and supplies most of the heat generated by the combustible mixed gas to the outside.

In some embodiments, the heat insulation shell comprises a heat insulation layer and a metal shell body, the metal shell body wraps the outer surface of the heat insulation layer, and the metal shell body is arranged in a hollow manner.

In above-mentioned technical scheme, the setting of metal casing body is used for fixed heat preservation insulating layer, simultaneously, utilizes metal casing body fretwork setting simultaneously, reduces heat-conducting efficiency on the one hand, and on the other hand also can utilize the setting of fretwork to dispel the heat fast to effectively avoid the heat to transmit to the combustion-supporting trachea in a large number through the metal casing body, the temperature of the combustion-supporting gas after the influence preheats, the probability that takes place the tempering when can further reducing the burning.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

FIG. 1 is a schematic block diagram of a hybrid combustor provided in accordance with certain embodiments of the present application;

FIG. 2 is a schematic structural view of a porous air distribution plate;

fig. 3 is a schematic structural view of the end plate.

Icon: 100-hybrid burners; 10-a gas pipe; 11-a gas inlet; 12-an air outlet end; 121-a gas nozzle; 20-a combustion-supporting gas pipe; 21-a first tube; 211-air inlet; 22-a second tube; 221-a mixing chamber; 30-spoilers; 40-porous air distribution plate; 41-a first zone; 42-a second zone; 43-well; 50-bell mouth; 60-downstream slice; 70-an upstream sheet; 81-a first housing; 82-a second housing; 83-heat insulation layer; 84-an end plate; 841-strip shaped holes.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present application, it should be noted that the indication of orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship which is usually placed when the product of the application is used, or the orientation or positional relationship which is conventionally understood by those skilled in the art, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," and "connected" are to be construed broadly, and may for example be fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Referring to fig. 1, fig. 1 is a schematic structural view of a hybrid burner 100 according to some embodiments of the present disclosure, that is, the hybrid burner 100 includes a gas pipe 10 and a combustion-supporting gas pipe 20, the gas pipe 10 is provided with a gas inlet 11, the combustion-supporting gas pipe 20 is provided with an air inlet 211, the gas pipe 10 has an air outlet end 12 extending into the combustion-supporting gas pipe 20, the air outlet end 12 is formed with a gas nozzle 121 located in the combustion-supporting gas pipe 20, and a mixing cavity 221 is formed in the combustion-supporting gas pipe 20 at a rear side of the gas nozzle 121 along an air outlet direction of the gas nozzle 121.

The gas pipe 10 has the end 12 of giving vent to anger that extends to in helping the gas pipe 20, and the gas gets into in the gas pipe 10 by gas import 11, and the gas sprays the gas in the combustion-supporting gas pipe 20 via the gas nozzle 121 of the end 12 is given vent to anger in the gas pipe 10, and the gas that sprays mixes in the mixing chamber 221 of the combustion-supporting gas pipe 20 that is located the gas nozzle 121 rear side with the air in the combustion-supporting gas pipe 20, and the gas gets into in the gas pipe 10 from the gas air inlet.

As shown in fig. 1, in the present embodiment, the inner diameter of the gas nozzle 121 is gradually reduced, and at this time, the gas nozzle 121 has a tapered structure, and the inner diameter of the gas nozzle 121 is gradually reduced. According to the bernoulli principle, the pressure of the gas in the gas nozzle 121 is gradually increased, the moving speed of the gas is gradually reduced, and when the gas is sprayed out of the gas nozzle 121, the moving speed of the gas is the highest, and the pressure of the gas is the lowest.

In some alternative embodiments, the inner diameter of the gas nozzle 121 may not be limited, and the gas nozzle 121 is provided with a plurality of gas outlets arranged in an array, wherein the gas outlet direction of each gas outlet is towards the mixing chamber 221, and the diameter of the gas outlet is smaller than that of the gas pipe 10.

The rear side refers to the injection direction of the combustible mixture gas injected through the gas nozzle 121.

Swirl refers to the flow phenomenon in which a fluid makes a circular motion.

The gas-assisted pipe 20 comprises a first pipe 21 and a second pipe 22 as a gas feeding section, an air inlet 211 is arranged on the first pipe 21, the first pipe 21 is sleeved outside the second pipe 22, a mixing cavity 221 is arranged in the second pipe 22, and the gas outlet end 12 of the gas pipe 10 penetrates through the first pipe 21 and extends into the second pipe 22.

Wherein, the second pipe 22 is sleeved on the gas pipe 10, and the second pipe 22 is arranged coaxially with the nozzle.

In some embodiments, with continued reference to fig. 1, the spoiler 30 is disposed inside the combustion supporting air pipe 20, and the spoiler 30 is disposed inside the mixing chamber 221, and the air inlet 211 is further away from the spoiler 30 than the gas nozzle 121 along the extending direction of the combustion supporting air pipe 20.

The spoiler 30 is arranged in the mixing cavity 221 in the gas-assisted pipe 20, because the air and the gas form a vortex in the mixing cavity 221, the mixing speed of the air and the gas is gradually reduced, the pressure of the combustible mixed gas generated by the air and the gas is gradually increased, the combustible mixed gas is in a high-pressure state at the moment, the combustible mixed gas is outwards diffused through the spoiler 30, the spoiler 30 can mix the air and the gas again, and therefore the air and the gas are mixed more uniformly.

The position of the air inlet 211 along the extending direction of the combustion-supporting gas pipe 20 is farther away from the mixing cavity 221 than the gas nozzle 121, so that the mixing cavity 221 in the combustion-supporting gas pipe 20 behind the gas nozzle 121 is a relatively closed space, and the combustible mixed gas can be conveniently diffused outwards.

The spoiler 30 can be of various structures, for example, the spoiler 30 is of a fan structure, in the actual working process, the gas inlet 11 of the gas pipe 10 is filled with high-temperature and high-pressure gas, and the air inlet 211 of the air pipe is filled with high-temperature and high-pressure air, so that the fan rotates relative to the mixing cavity 221, and the air and the gas are uniformly mixed in a stirring manner.

In some embodiments, referring to fig. 1 and fig. 2, fig. 2 is a schematic structural view of the porous air distribution plate 40 shown in fig. 1, the porous air distribution plate 40 is connected to the combustion-supporting gas pipe 20, and the spoiler 30 is located between the gas nozzle 121 and the porous air distribution plate 40 along the extending direction of the combustion-supporting gas pipe 20.

When the combustible mixed gas is gathered to a certain degree near the air distribution plate, the combustible mixed gas can be sprayed out from the holes 43 of the porous air distribution plate 40, the pressure intensity of the combustible mixed gas is the lowest, the movement speed is the highest, the gas sprayed out from the porous air distribution plate 40 forms low pressure in the rear side of the air distribution plate at high speed, so that the newly mixed combustible mixed gas is sucked from the mixing cavity 221, the previously formed combustible mixed gas forms a vortex with the newly formed combustible mixed gas, the previously formed combustible mixed gas is further mixed with the newly formed combustible mixed gas, the previously formed combustible mixed gas and the newly formed combustible mixed gas can be uniformly mixed, and the porous air distribution plate 40 has a plurality of holes 43, the previously formed combustible mixed gas and the newly formed combustible mixed gas can form a plurality of swirls, thereby improving the mixing effect of the air and the fuel gas.

The holes 43 of the perforated grid 40 may be of various shapes, such as elongated through holes 43 or circular holes 43.

The perforated air distribution plate 40 may have various structures, such as the holes 43 in different areas of the perforated air distribution plate 40 are distributed in a uniform density, or the holes 43 in different areas of the perforated air distribution plate 40 are distributed in a non-uniform density.

In some embodiments, with continued reference to fig. 2, the perforated grid 40 includes a first section 41 corresponding to the oxidant gas pipe 20 and a second section 42 located at the periphery of the first section 41, and the density of the holes 43 of the first section 41 is greater than the density of the holes 43 of the second section 42.

The porous air distribution plate 40 has a structure that the density of holes 43 of the first area 41 corresponding to the combustion-supporting gas pipe 20 is greater than that of holes 43 of the second area 42 located at the periphery of the first area 41 of the porous air distribution plate 40, the concentration degree of the combustible mixed gas at the position corresponding to the first area 41 in the mixing cavity 221 is greater than that at the position corresponding to the second area 42 in the mixing cavity 221, the diffusion effect of the first area 41 of the porous air distribution plate 40 on the combustible mixed gas is greater than that of the second area 42 of the porous air distribution plate 40 to some extent, and most of the combustible mixed gas collected through the first area 41 and the combustible mixed gas collected through the second area 42 can be sprayed out. The amount of the combustible mixed gas ejected through the first zone 41 is larger than the amount of the combustible mixed gas ejected through the second zone 42, and the combustible mixed gas ejected through the first zone 41 is diffused into the combustible mixed gas ejected through the second zone 42, so that the combustible mixed gas ejected through the first zone 41 and the combustible mixed gas ejected through the second zone 42 can be uniformly mixed.

In some embodiments, referring to fig. 1, the front end of the combustion-supporting air tube 20 is provided with a bell mouth 50, and the porous air distribution plate 40 is disposed at the large end of the bell mouth 50.

The front end of the combustion-supporting gas pipe 20 is provided with a bell mouth 50, and the porous air distribution plate 40 is arranged at the large end of the bell mouth 50, so that the combustible mixed gas can be conveniently diffused to the porous air distribution plate 40.

Illustratively, the grid plate is welded to the large end of the bell mouth 50.

In other embodiments, the flare 50 of the front end of the oxidant gas pipe 20 may be replaced by a cylindrical port, a square port, or the like, which is not limited herein.

In some embodiments, referring to fig. 1, the hybrid combustor 100 further includes a heat insulating casing, an upstream sheet 70 and a downstream sheet 60.

A gas distribution combustion chamber is formed in the heat-preservation and heat-insulation shell, the gas feeding end of the combustion-supporting gas pipe 20 penetrates through the heat-preservation and heat-insulation shell, so that a mixing chamber 221 is formed in the heat-preservation and heat-insulation shell, and the mixing chamber 221 is communicated with the gas distribution combustion chamber and is positioned on the front side of the gas distribution combustion chamber. Along the extending direction of the combustion-supporting air pipe 20, the air distribution combustion chamber is provided with an upstream sheet 70 and a downstream sheet 60 in sequence along the airflow flowing direction.

The porous air distribution plate 40 is located between the spoiler 30 and the downstream sheet 60, an air distribution cavity is formed between the porous air distribution plate 40 and the downstream sheet 60, and the upstream sheet 70 is located in the air distribution cavity.

Along the extending direction of the combustion-supporting gas pipe 20, the porous air distribution plate 40 is positioned between the spoiler 30 and the downstream sheet 60, an air distribution cavity is formed between the porous air distribution plate 40 and the downstream sheet 60, air and fuel gas are mixed in the mixing cavity 221, the air and the fuel gas are mixed again through the spoiler 30 to form combustible mixed gas, the combustible mixed gas is sprayed into the air distribution cavity through the porous air distribution plate 40, the combustible mixed gas is scattered and mixed through the upstream sheet 70 and then is ignited at the downstream sheet 60, and blue flame combustion or infrared combustion occurs.

The upstream sheet 70 is arranged in the air distribution chamber, and is ignited in the downstream sheet 60, and under the condition that flameless combustion occurs in the downstream sheet 60, the upstream sheet 70 can play a role in through-flow heat insulation and backfire prevention, so that heat generated by infrared combustion of the combustible mixed gas in the downstream sheet 60 is prevented from being dissipated, and the heat efficiency is improved.

Blue flame combustion refers to combustion of a gas with sufficient oxygen content.

The infrared combustion refers to a combustion method in which the infrared combustion is completely premixed combustion, i.e., fuel gas is completely mixed with required air, and combustible mixed gas instantaneously completes a combustion process in cooperation with a flame stabilizer, the combustion reaction is performed in a fire hole and on the outer surface, and the flame on the outer surface of the fire hole is short, which is also called flameless combustion. In the actual working process, the downstream sheet 60 needs to be heated first, then infrared rays with a certain wavelength are released secondarily through the heated downstream sheet 60 at a high temperature, and heat energy is transferred to the outside through infrared radiation.

The downstream sheet 60 may be of various configurations, such as a metallic mesh or a porous ceramic for the downstream sheet 60.

In some embodiments, the downstream sheet 60 is a silicon carbide ceramic foam.

The downstream sheet 60 is made of silicon carbide ceramic foam, which is a porous ceramic material with a three-dimensional network structure, and the material has high thermal conductivity and good thermal conduction effect, and can transfer part of heat generated by the combustion of combustible mixed gas from a high-temperature area to the combustible mixed gas which is not preheated in a low-temperature area, improve the combustion rate and enable the gas to be completely combusted.

It should be noted that the technology for generating infrared combustion in the downstream sheet 60 by the combustible mixed gas is a porous medium combustion technology, and due to three heat exchange modes of convection, heat conduction and radiation in the porous medium combustion technology, the temperature of a combustion area tends to be uniform, and a relatively stable temperature gradient is maintained. The high-temperature-resistant high-temperature-resistant high-temperature-resistant high-temperature-resistant high-temperature-resistant high-temperature-resistant high-temperature-resistant high-temperature-resistant high-temperature-resistant high-pressure resistant high-temperature-resistant high-temperature-resistant high-temperature-resistant high-temperature-resistant high-pressure gas.

In some embodiments, the upstream sheet 70 is a ceramic fiber material.

The upstream sheet 70 is made of a ceramic fiber material, the ceramic fiber material is a fibrous light refractory material, the high temperature resistance, the thermal stability and the thermal conductivity are good, heat generated by the combustible mixed gas can be isolated in the air distribution cavity, and the heat dissipation generated by the combustible mixed gas is reduced, so that most of the heat generated by the combustible mixed gas is supplied to the outside.

In some embodiments, the thermal insulation casing includes a thermal insulation layer 83 and a metal casing body, the metal casing body wraps the outer surface of the thermal insulation layer 83, and the metal casing body is hollow.

Specifically, the metal shell body includes a first shell 81 and a second shell 82, the second shell 82 is connected to one end of the first shell 81 in the extending direction of the combustion-supporting air pipe 20, and heat insulating layers 83 are disposed in the first shell 81 and the second shell 82.

Illustratively, the diameter of the first housing 81 is larger than that of the second housing 82, and the first housing 81 and the second housing 82 are stepped to cut off heat radiation in the burner.

Illustratively, the material of the thermal insulation layer 83 is ceramic fiber material.

The types of the materials of the thermal insulation layer 83 corresponding to the first shell 81 and the thermal insulation layer 83 corresponding to the second shell 82 may be the same or different, and reference may be made to related technologies, which is not described herein again.

The metal shell body is hollowed out, for example, the first shell 81 and the second shell 82 are both long slotted hole meshed structures, so that on one hand, the efficiency of heat conduction is reduced, on the other hand, the hollowed-out structures can be utilized to quickly dissipate heat, and therefore the situation that the temperature of the preheated combustion-supporting gas is influenced by effectively avoiding the heat from being transmitted to the combustion-supporting gas pipe 20 through the metal shell body in a large amount and the probability of backfire during combustion can be further reduced.

Optionally, referring to fig. 1 and fig. 3, the metal shell body has an end plate 84 far away from the gas distribution combustion chamber, the end plate 84 is sleeved around the combustion assisting gas pipe 20, and the end plate 84 is hollow.

Referring to fig. 3, the end plate 84 is provided with a plurality of slit holes 841, the slit holes 841 being arranged in a circumferential array, each slit hole 841 penetrating the end plate 84 in the axial direction of the nozzle, each slit hole 841 extending in the radial direction of the end plate 84. By utilizing the arrangement, the temperature rise of the combustion-supporting gas in the combustion-supporting gas pipe 20 can be uniformly limited, and the phenomenon that the local temperature is too high to influence the anti-backfire effect is avoided.

Optionally, the end plate 84 is provided with a plurality of orifice layers in the radial direction, each orifice layer includes a plurality of strip-shaped holes 841 arranged in a circumferential array, wherein, in any adjacent two orifice layers, the strip-shaped holes 841 of one orifice layer and the strip-shaped holes 841 of the other orifice layer may be arranged correspondingly or alternatively, and are not limited herein.

As shown in fig. 3, endplate 84 is provided with a layer of orifices in the radial direction.

In summary, the present application provides a hybrid burner, which can improve the mixing effect of air and gas and improve the combustion effect of combustible mixed gas.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A hybrid combustor, comprising:

the combustion-supporting gas pipe is provided with an air inlet; and

the gas pipe is provided with a gas inlet, the gas pipe is provided with a gas outlet end extending into the combustion-supporting gas pipe, the gas outlet end is provided with a gas nozzle located in the combustion-supporting gas pipe, and a mixing cavity is formed in the combustion-supporting gas pipe at the rear side of the gas nozzle along the gas outlet direction of the gas nozzle.

2. The instant mixing burner as claimed in claim 1, wherein the combustion-supporting gas pipe has a gas feeding section sleeved on the gas pipe, the gas feeding section being arranged coaxially with the nozzle.

3. The instant mixing burner as claimed in claim 1, wherein a spoiler is provided in the combustion-supporting gas tube, the spoiler being located in the mixing chamber, the air inlet being further from the mixing chamber than the gas nozzle in an extending direction of the combustion-supporting gas tube.

4. The hybrid combustor as claimed in claim 3, further comprising a perforated air distribution plate connected to the combustion-supporting gas pipe, wherein the spoiler is located between the gas nozzle and the perforated air distribution plate along an extending direction of the combustion-supporting gas pipe.

5. The instant mixing burner of claim 4, wherein the porous air distribution plate includes a first region corresponding to the oxidant gas pipe and a second region located at an outer periphery of the first region, and a density of holes of the first region is greater than a density of holes of the second region.

6. The instant mixing burner as claimed in claim 4, wherein the front end of the combustion-supporting gas pipe is provided with a bell mouth, and the porous air distribution plate is arranged at the large end of the bell mouth.

7. The mixing burner of claim 2, wherein the mixing burner comprises a heat-insulating housing, and a gas distribution combustion chamber is formed in the heat-insulating housing;

the gas supply end of the combustion assisting gas pipe penetrates through the heat-insulating shell, so that the mixing cavity is formed in the heat-insulating shell, and the mixing cavity is communicated with the gas distribution combustion cavity and is positioned on the front side of the gas distribution combustion cavity.

8. The instant mixing burner of claim 7, wherein the gas distribution combustion chamber is provided with an upstream piece and a downstream piece in sequence along the flow direction of the gas flow.

9. The hybrid combustor as in claim 8, wherein the upstream sheet is a ceramic fiber material and the downstream sheet is a silicon carbide ceramic foam.

10. The instant mixing burner as claimed in claim 7, wherein the heat insulation housing comprises a heat insulation layer and a metal shell body, the metal shell body wraps the outer surface of the heat insulation layer, and the metal shell body is hollowed out.