CN213930912U

CN213930912U - A kind of burner

Info

Publication number: CN213930912U
Application number: CN202022261316.XU
Authority: CN
Inventors: 覃正; 刘小勇; 王延文; 李春光; 李志永; 高麟
Original assignee: Beijing Power Machinery Institute
Current assignee: Beijing Power Machinery Institute
Priority date: 2020-10-12
Filing date: 2020-10-12
Publication date: 2021-08-10
Anticipated expiration: 2030-10-12

Abstract

The utility model provides a combustor, including main combustion chamber, precombustion chamber, mix the chamber in advance, after fire the structure, heating pipeline, main fuel pipeline, mix chamber entry fuel nozzle and fuel distributor in advance. The utility model discloses a recombustion structure that has the heat accumulation and help the recombustion can accumulate the heat after the flame heating through precombustion, and when torch outer flame (main flame) extinguish, recombustion structure utilizes the heat accumulation to ignite torch outer flame (main flame) again to effective recombustion after guaranteeing to extinguish.

Description

A kind of burner

Technical Field

The utility model relates to a combustor belongs to hand-held type torch technical field.

Background

In various large-scale sports meetings and celebration activities, a handheld torch is often required to be used for transferring the fire seeds, and the process of transferring the fire seeds is carried out outdoors, so that the external environment has great influence on the combustion of the torch. At present, the domestic torch generally adopts gaseous fuel (such as propane, etc.), propane liquid gasifies in the gas cylinder, and gaseous phase propane steam provides the torch combustor, and the gas cylinder pressure can take place great change in the gas supply process, and the gas feed is unstable to cause the torch and can not stably burn, in addition weather is like effects such as wind and rain, temperature, very easily causes the torch to flame out, can't reburn.

ZL200710087037.2 provides a gas flame ware that stabilizes, adopts gaseous fuel, has structurally adopted the scheme of main combustion chamber and precombustion chamber, has played flame stabilization's effect to a certain extent, nevertheless can not effectively reburn after main burning flame extinguishes, and combustion efficiency is not high simultaneously, can cause carbon deposit and soot to discharge, influences burning and polluted environment.

ZL201320016728.4 provides a prevent handheld torch of stifling, and ZL201220614046.9 provides a torch with the combustion-supporting device of oxygen supply, has all increased the apparatus of oxygen supply in the torch, can increase extra device on the one hand, and oxygen and gaseous fuel supply cooperation are difficult to be controlled, and on the other hand these two structures all do not have the effect of stable flame, easily extinguish and can't effectively reburn, and combustion efficiency is not high simultaneously.

ZL200620055362.1 provides prevent wind-proof rain-proof torch combustor, and ZL200620056314.4 provides the super steady state combustor for the torch, all adopts the burning of interior outer lane to prevent that flame from extinguishing, but the effect of outer lane also does not have stable flame in these two structures equally, extinguishes and can not effectively after burning, and the not high existence carbon deposit of combustion efficiency simultaneously.

The metal windproof sheet is additionally arranged above the combustion port of the torch, when the torch is normally combusted, the windproof sheet is heated, and when flame is extinguished by wind, the windproof sheet is utilized to keep high temperature to ignite fuel again, so that the recombustion effect is achieved. For example, CN201020280148.2 provides a combustion device for a torch, in which a high melting point metal member (such as a tungsten wire) is disposed at a combustion port, the torch heats the tungsten wire after ignition, and when the flame is extinguished by wind, the fuel is re-ignited by the high temperature tungsten wire. The re-burning mode is not easy to maintain high temperature to re-ignite the fuel, and if the torch is in the working conditions of turning, leveling, inversion, falling and the like, the re-burning effect is not good. Still some torches install the purpose that the relight igniter reached the relight torch additional, but torch structure is complicated, and the ignition effect is not good.

Disclosure of Invention

An object of the utility model is to overcome prior art not enough, provide a simple structure, steady flame is effectual, combustion efficiency is high, be difficult for flame-out and can effectively reburn the combustor.

The technical solution of the utility model is as follows: a burner comprises a main combustion chamber, a precombustion chamber, a premixing chamber, a afterburning structure, a heating pipeline, a main fuel pipeline, a premixing chamber inlet fuel nozzle and a fuel distributor, wherein one end of the heating pipeline extends to the upper part or the lower part of the main fuel pipeline and is wound for a plurality of circles and then is connected with the inlet end of the fuel distributor, the outlet end of the fuel distributor is divided into at least two paths, one path of the main fuel pipeline is connected with the main fuel pipeline, the main fuel pipeline extends upwards into the main combustion chamber, the other path of the main fuel pipeline is connected with the bottom of the premixing chamber through a premixing chamber inlet fuel nozzle, the upper end of the premixing chamber is connected with the pre-combustion chamber, the re-combustion structure is fixedly arranged below the main fuel pipeline, the flame of the main combustion chamber is transferred to the pre-combustion chamber through the flame transfer channels on the re-combustion structure and the reserved space on the periphery of the flame transfer channels, the flame of the pre-combustion chamber is ignited, and the flame of the pre-combustion chamber heats the re-combustion structure to store heat.

The utility model has the advantages of compared with the prior art:

(1) the utility model adopts the recombustion structure with heat accumulation and recombustion assistance, heat can be accumulated after the heating of the precombustion flame, and when the torch outer flame (main flame) is extinguished, the recombustion structure utilizes the accumulated heat to reignite the torch outer flame (main flame) so as to ensure the effective recombustion after the flameout;

(2) the utility model adopts the reburning structure with dual functions of catalytic combustion and heat storage-assisted reburning, on one hand, the reburning structure accumulates heat and carries out flameless combustion on the mixed gas passing through, further improving the reliability of reburning, on the other hand, carries out catalytic combustion on the mixed gas, improves the combustion efficiency and cleanliness, reduces the emission of pollutants such as soot and the like, and partially eliminates the problem of carbon deposition;

(3) the structure form of the utility model combining the premixing chamber, the precombustion chamber and the main combustion chamber forms a two-stage mixing and three-stage injection tissue combustion mode, so that the torch can be stably and efficiently combusted, and the wind and rain resistance is enhanced;

(4) the utility model adopts the heating pipeline with dual functions of catalytic combustion and catalytic cracking, thereby further improving the combustion efficiency and the combustion cleanliness;

(5) the utility model discloses a processing hole crowd on main combustion chamber improves the intake and exhaust effect under the windy operating mode, reduces the flame-out rate.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention (the after-combustion structure is located in the main combustion chamber);

FIG. 2 is a schematic cross-sectional view of the re-combustion structure of the present invention (the end face is annularly and densely distributed with channels, the channel cross-section is circular);

FIG. 3 is a schematic cross-sectional view of the re-combustion structure of the present invention (the end face is annularly and densely distributed with channels, the channel cross-section is square);

FIG. 4 is a schematic cross-sectional view (grid-like) of the re-combustion structure of the present invention;

FIG. 5 shows a gas torch combustion system using the present invention, in which 1 is a fuel bottle and 3 is a pressure stabilizer.

Detailed Description

The present invention will be described in detail with reference to the following specific examples and accompanying drawings.

The utility model discloses as shown in fig. 1, a combustor is provided, including main combustion chamber 9, precombustion chamber 7, mix chamber 6 in advance, after burn structure 8, heating line 11, main fuel pipeline 5, mix chamber entry fuel nozzle 13 and fuel distributor 4 in advance. After being connected with a fuel supply system, the heating pipeline 11 extends upwards to the upper part or the lower part of the main fuel pipeline 5 and is wound for a plurality of circles and then is connected with the inlet end of the fuel distributor 4, the outlet end of the fuel distributor 4 is divided into at least two paths, one path is connected with the main fuel pipeline 5, and the other path is connected with the bottom of the premixing chamber 6 through a premixing chamber inlet fuel nozzle 13.

The main fuel pipeline 5 extends upwards to the inside of the main combustion chamber 9, a plurality of fuel spray holes are uniformly distributed on the main fuel pipeline in the main combustion chamber 9, fuel is sprayed to the main combustion chamber 9, and combustion in the main combustion chamber is carried out to form main flame. The side wall surface of the main combustion chamber is provided with a plurality of air holes, so that the discharge speed of the flue gas flowing back into the torch under the windy condition is increased, and the flame-out of the torch is avoided. Meanwhile, under the normal working condition, the air entering from the hole groups under the injection action of the main flame increases the air quantity participating in torch combustion, and is beneficial to improving the combustion efficiency and reducing the pollution emission.

The premixing chamber inlet fuel nozzle 13 is connected with the bottom of the precombustion chamber 6, 1 (center) or more than 2 (circumferentially and uniformly distributed) spray holes can be arranged at the connection part, and fuel is sprayed from the bottom of the premixing chamber 6.

The premixing chamber 6 plays a role of primary premixing, and the flame stabilizing performance of the precombustion chamber can be further improved. As shown in fig. 1, a plurality of injection holes 61 are uniformly distributed in the circumferential direction at the lower part of the premixing chamber 6, the fuel heated in the heating pipeline is injected into the premixing chamber 6 from the premixing chamber inlet fuel nozzle 13, and is mixed with the air entering from the injection holes 61 to form a first-stage combustible premixed gas, and then is injected into the precombustion chamber from the premixing chamber outlet gas mixing nozzle at the upper end of the premixing chamber at a relatively high speed, and is further mixed with the air entering the precombustion chamber, so that the first-stage premixing of the precombustion chamber is increased into two-stage premixing.

The utility model discloses can arrange through the injection hole, the size reaches and mix the chamber size design in advance (concrete design can obtain the optimal scheme through emulation optimization), spout under the fuel effect of mixing the chamber in advance, make the air that gets into through the injection hole and mix the chamber in advance take place to draw the effect, make fuel can fully mix in mixing the chamber in advance, do benefit to follow-up burning.

The utility model discloses the premixing chamber can be the equal diameter or the drum type structure of variable diameter, is divided into the lower part and draws district and upper portion blending zone as shown in fig. 1, 2, and the diameter that the lower part was drawn the district is preferred to be less than upper portion blending zone diameter.

The gas mixing nozzle at the outlet of the premixing chamber can be provided with 1 (center) or more than 2 (circumferentially and uniformly distributed) spray holes, the combustible gas mixture sprayed out of the premixing chamber has high speed, the flame has good rigidity after being ignited, the flame is not easy to blow out, and the wind resistance is good; meanwhile, after the high-speed combustible mixed gas enters the precombustion chamber, an injection effect is formed in the precombustion chamber, the increase of the air flow entering the precombustion chamber is facilitated, and the mixing of the high-speed combustible mixed gas and fuel is enhanced. Meanwhile, the pre-combustion flame after pre-mixing has high energy density and better heating effect on a re-combustion structure.

And an air inlet is formed on the side wall surface at the bottom or the lower part of the precombustion chamber, and air enters the precombustion chamber through the air inlet and is subjected to secondary mixing with the primary mixed fuel sprayed by the premixing chamber at the lower part of the precombustion chamber.

The re-combustion structure 8 is fixedly arranged at the lower part of the main combustion chamber or the middle upper part of the pre-combustion chamber, is positioned between the flame of the main combustion chamber and the flame of the pre-combustion chamber, and is fixed by a re-combustion structure fixing seat 10, and a certain gap is reserved between the re-combustion structure 8 and the wall surface of the main combustion chamber or the pre-combustion chamber. The re-combustion structure fixing seat 10 can be fixedly connected with the pre-combustion chamber or the main combustion chamber, and can also be fixedly connected with the pre-combustion chamber or the main combustion chamber through a main fuel pipeline or a heating pipeline.

Fig. 1 shows an installation mode of the afterburning structure 8, wherein the heating pipeline 11 is positioned below the main fuel pipeline 5, and the afterburning structure 8 is installed in the main combustion chamber 9 and positioned between the main fuel pipeline 5 (main flame) and the heating pipeline 11 (upper end part), and a certain gap is formed between the periphery of the afterburning structure and the wall surface of the main combustion chamber. Another installation mode of the re-combustion structure 8 is that the heating pipeline 11 is positioned below the main fuel pipeline 5, the re-combustion structure 8 is installed at the middle upper part of the pre-combustion chamber 7 and positioned between the heating pipeline 11 (lower end part) and the pre-combustion flame, and a certain gap is formed between the periphery of the re-combustion structure and the wall surface of the pre-combustion chamber. The afterburner structure 8 can be mounted in other ways as long as it is located between the main and prechamber flames.

The re-burning structure 8 is a three-dimensional structure with a certain thickness, and comprises a re-burning structure main body and a plurality of flame transmission channels densely distributed on the re-burning structure main body. The utility model discloses the after combustion structure has the function that the heat accumulation helps the after combustion, when the torch ignition starts, main combustion area flame (main flame) gives the precombustion chamber through the flame transfer passage of after combustion structural and periphery headspace fire transfer, ignites the fuel of second grade mixing in the precombustion chamber, forms stable precombustion flame in the precombustion chamber, and later flame is to after combustion structure sustained heating, plays its heat accumulation effect. When the outer flame (main flame) of the torch is extinguished, the afterburning structure can utilize the accumulated heat and ignite the fuel gas, so that the outer flame of the torch is combusted again, and the effective afterburning of the flame-out torch is ensured.

Preferably, a combustion catalyst is attached to the surface of the re-combustion structure and the inner wall of the flame transfer channel, so that the re-combustion structure has dual functions of catalytic combustion and heat storage-assisted re-combustion (better re-combustion effect), on one hand, the re-combustion structure accumulates heat and performs flameless combustion on the passing mixed gas, so that the re-combustion reliability is further improved, on the other hand, the flame transfer channel performs catalytic combustion on the mixed gas, so that the combustion efficiency and cleanliness are improved, the emission of pollutants such as carbon smoke and the like is reduced, and the problem of carbon deposition is partially eliminated; in addition, the torch can still reliably work under the working conditions of overturning, leveling, inverting, falling and the like.

As shown in FIG. 2, a re-ignition structure is provided, which comprises a re-ignition structure body 71 and a flame transmission channel 72 densely distributed on the re-ignition structure body. The cross-section of the flame transfer passages 72 of the afterburner structure can be circular (as shown in FIG. 2), square (as shown in FIG. 3), or other shapes. As shown in FIG. 4, the flame transmission channel of the afterburning structure can also be a honeycomb structure or a grid structure.

The post-combustion structure 8 may be made of metal or ceramic, but is not limited thereto, as long as it can perform a heat storage function, and the design of specific material, size, etc. may be realized by optimization design. The combustion catalyst is used for catalytic combustion of fuel, and its kind is determined according to the kind of fuel, and is well known in the art.

One end of the heating pipeline 11 is connected with the fuel supply system, extends upwards to the upper part or the lower part of the main fuel pipeline 5 and is connected with the inlet end of the fuel distributor 4 after being wound for a plurality of circles. If it is desired to heat the fuel bottles of the fuel supply system, the heating line 11 is extended to the outside of the fuel bottles for several turns before being connected to the inlet end of the fuel dispenser 4. The winding portion (regenerative portion) of the heating line 11 on the outer side of the fuel bottle 1 is designed as needed, and may be U-shaped winding as shown in fig. 5, or may be spiral or other forms.

Further optimization, the inner wall of the pipe is coated with a cracking catalyst, and the outer wall of the pipe is coated with a combustion catalyst at the wound part (heating part) of the heating pipeline 10 above or below the main fuel pipeline 5, so that the combustion efficiency and the combustion cleanliness can be further improved. The fuel on the inner wall of the pipe at the winding part is decomposed into components such as hydrogen which is easier to burn under the action of the cracking catalyst, so that the improvement of the combustion efficiency and the combustion reliability are facilitated, the carbon smoke emission is reduced, the combustion catalyst on the outer wall of the pipe carries out catalytic combustion on the flame of the main combustion area, and the combustion efficiency and the cleanliness are improved.

The cracking catalyst is used for catalytically cracking fuel, and the combustion catalyst is used for catalytically combusting the fuel, and the type of the combustion catalyst is determined according to the type of the fuel and is a well-known technology in the field.

Furthermore, the outlet end of the fuel distributor 4 is divided into at least three paths, one path is connected with the main fuel pipeline 5, the other path is connected with the premixing chamber inlet fuel nozzle, the other path is connected with the precombustion chamber fuel pipeline 12, the precombustion chamber fuel pipeline extends into the precombustion chamber 7, a plurality of fuel spray holes are uniformly distributed on the precombustion chamber fuel pipeline in the precombustion chamber to spray fuel to the precombustion chamber 7, and the precombustion chamber fuel pipeline is arranged below the re-combustion structure.

The utility model discloses the principle:

when the device starts to work, fuel enters the heating pipeline, the heated fuel enters the fuel distributor to be divided into two or three paths after flowing through the combustion area, one path of the heated fuel is sprayed into the premixing chamber to be mixed for the first time, then is sprayed into the precombustion chamber to be mixed for the second time with air in the precombustion chamber (and the other path of the heated fuel is sprayed into the precombustion chamber through the fuel pipeline of the precombustion chamber), and the mixed gas is combusted in the precombustion chamber (or part of the mixed gas is combusted through the catalytic combustion of the reburning structure); one path is sprayed into the main combustion chamber through the main fuel pipeline for combustion, when a torch is ignited, the main combustion chamber is ignited, flame combusted in the main combustion chamber is ignited through a flame transfer passage on the reburning structure and a gap reserved at the periphery of the flame transfer passage, secondary mixed gas in the precombusting chamber is ignited to form stable precombusting flame, and then the flame continuously heats the reburning structure to play a heat storage role. When the flare outer flame (main flame) is extinguished, the afterburning structure can utilize accumulated heat (or simultaneously carry out flameless combustion) to ignite the outer flame again so as to ensure afterburning after flameout.

The detailed description of the present invention is the technology known to those skilled in the art.

Claims

1. A burner, characterized by: the main combustion chamber comprises a main combustion chamber, a precombustion chamber, a premixing chamber, a reburning structure, a heating pipeline, a main fuel pipeline, a premixing chamber inlet fuel nozzle and a fuel distributor, wherein one end of the heating pipeline extends to the position above or below the main fuel pipeline and is wound for a plurality of circles and then is connected with the inlet end of the fuel distributor, the outlet end of the fuel distributor is at least divided into two paths, one path of the heating pipeline is connected with the main fuel pipeline, the main fuel pipeline extends upwards to the inside of the main combustion chamber, the other path of the heating pipeline is connected with the bottom of the premixing chamber through the premixing chamber inlet fuel nozzle, the upper end of the premixing chamber is connected with the precombustion chamber, the reburning structure is fixedly installed below the main fuel pipeline and is densely distributed with a plurality of flame transfer channels, the flame of the main combustion chamber is transferred to the precombustion chamber through the flame transfer channels on the reburning structure and the reserved space at the periphery of the flame transfer channels, the precombustion chamber is ignited, and the flame heating reburning structure of the precombustion chamber carries out heat storage.

2. A burner as claimed in claim 1, wherein: and a combustion catalyst is attached to the surface of the re-combustion structure and the inner wall of the flame transfer channel.

3. A burner as claimed in claim 1 or 2, wherein: the premixing chamber is in a cylindrical structure with the same diameter or variable diameter and consists of an injection area and a mixing area.

4. A burner as claimed in claim 3, wherein: and a plurality of injection holes are uniformly distributed at the lower part of the premixing chamber in the circumferential direction.

5. The burner of claim 4, wherein: and the joint of the premixing chamber and the precombustion chamber is provided with a premixing chamber outlet gas mixing nozzle which is 1 central spray hole or more than 2 spray holes uniformly distributed in the circumferential direction.

6. A burner as claimed in claim 1 or 2, wherein: the secondary combustion structure is arranged in the main combustion chamber and is positioned below the flame of the main combustion chamber, and a certain gap is formed between the periphery of the secondary combustion structure and the wall surface of the main combustion chamber; or the re-combustion structure is arranged at the middle upper part of the pre-combustion chamber and is positioned above the flame of the pre-combustion chamber, and a certain gap is formed between the periphery of the re-combustion structure and the wall surface of the pre-combustion chamber.

7. A burner as claimed in claim 1 or 2, wherein: the afterburning structure is made of metal or ceramic materials, and the cross section of the flame transfer channel is of a square, circular, honeycomb or grid structure.

8. A burner as claimed in claim 1 or 2, wherein: the inner wall of the heating pipeline is coated with cracking catalyst, and the outer wall of the heating pipeline is coated with combustion catalyst.

9. A burner as claimed in claim 1 or 2, wherein: the side wall surface of the main combustion chamber is provided with a plurality of air holes, and the bottom or the side wall surface of the precombustion chamber is provided with an air inlet hole.

10. A burner as claimed in claim 1 or 2, wherein: the outlet end of the fuel distributor also comprises a path of fuel pipeline connected with the precombustion chamber, the precombustion chamber fuel pipeline extends into the precombustion chamber, is uniformly provided with a plurality of fuel jet holes and jets fuel to the precombustion chamber, and is arranged at the middle lower part of the precombustion chamber.