CN213930914U

CN213930914U - Combustion apparatus

Info

Publication number: CN213930914U
Application number: CN202022261550.2U
Authority: CN
Inventors: 汪旭; 张波; 费立群; 李春光; 李志永; 胡申林
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 combustion apparatus, including main combustion chamber, mix the chamber in advance, after burn structure, heating line, main fuel line, mix chamber entry fuel nozzle in advance, mix chamber export in advance and mix gas nozzle and fuel distributor. 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

Combustion apparatus

Technical Field

The utility model relates to a combustion apparatus 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 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 does not also have stable flame in these two structures equally, easily extinguishes and can't effective 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

The utility model aims to overcome the prior art not enough, provide a simple structure, steady flame is effectual, be difficult for flame-out and can effectively reburn burner.

The technical solution of the utility model is as follows: the combustion device comprises a main combustion chamber, a premixing chamber, a re-combustion structure, a heating pipeline, a main fuel pipeline, a premixing chamber inlet fuel nozzle, a premixing chamber outlet gas mixing 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 by a plurality of circles and 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 is connected with the main fuel pipeline, the main fuel pipeline extends upwards to the inside of the main combustion chamber, the other path is connected with the bottom of the premixing chamber through the premixing chamber inlet fuel nozzle, fuel is mixed in the premixing chamber and then is sprayed out from the premixing chamber outlet gas mixing nozzle, the re-combustion structure is fixedly arranged below the main fuel pipeline, a plurality of flame transfer channels are densely distributed on the re-combustion structure, the flame of the main combustion chamber is transferred to the gas mixture sprayed out of the premixing chamber through the flame transfer channels, the pre-burning flame heats the re-burning 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 utility model adopts the premixing chamber with the injection holes, the fuel injection performs the injection effect on the air entering from the injection holes, so that the fuel is fully mixed, the flame rigidity above the premixing chamber is better, the flame is not easy to blow out, and the wind resistance is better;

(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 air inlet group on main combustion chamber improves the effect of exhausting 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 8, mix chamber 6 in advance, after burn structure 7, heating line 10, main fuel pipeline 5, mix chamber entry fuel nozzle 11 in advance, mix chamber export in advance and mix gas nozzle and fuel distributor 4. One end of the heating pipeline 10 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 premixing chamber 6 through a premixing chamber inlet fuel nozzle 11.

The main fuel pipeline 5 extends upwards to the inside of the main combustion chamber 8, a plurality of fuel spray holes are uniformly distributed on the main fuel pipeline 5 in the main combustion chamber 8, fuel is sprayed to the main combustion chamber 8, 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 11 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 in full premixing, as shown in fig. 1 and 2, a plurality of injection holes 61 are uniformly distributed in the circumferential direction of the lower portion of the premixing chamber 6, fuel heated in the heating pipeline is injected into the premixing chamber 6 from a premixing chamber inlet fuel nozzle 11, is mixed with air entering from the injection holes 61 to form combustible premixed gas, and then is injected from a premixing chamber outlet gas mixing nozzle at the upper end of the premixing chamber at a relatively high speed.

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, divide into the lower part as shown in fig. 1 and draw district and upper portion and mix the district, and the diameter that the lower part draws the district is preferred to be less than upper portion and mixes the district 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 is high in speed, flame rigidity is good after the combustible gas mixture is ignited, the combustible gas mixture is not easy to blow out, and wind resistance is good.

After burn structure 7 fixed mounting in advance the combustion chamber top, can be located main combustion chamber in, also can not be located main combustion chamber, as long as be located main combustion chamber flame and the precombustion flame between, it is fixed through after burning structure fixing base 9, if be located main combustion chamber in, after burn structure 7 and main combustion chamber wall have certain clearance. The re-burning structure fixing seat 9 can be fixedly connected with the main burning chamber and also can be fixedly connected with the main fuel pipeline or the heating pipeline.

Fig. 1 shows an installation manner of the afterburning structure 7, in which the heating pipeline 10 is located below the main fuel pipeline 5, and the afterburning structure 7 is installed in the main combustion chamber 8 and located between the main fuel pipeline 5 (main flame) and the heating pipeline 10 (upper end), and a certain gap is formed between the periphery of the afterburning structure and the wall surface of the main combustion chamber. Another installation manner of the afterburning structure 7 is that the heating pipeline 10 is located below the main fuel pipeline 5, and the afterburning structure 7 is located below the heating pipeline 10 (upper end) and above the premixing chamber, and a certain gap is formed between the periphery of the afterburning structure and the wall surface of the main combustion chamber. The afterburning structure 7 can be installed in other ways as long as it is located between the main combustion chamber flame and the precombustion flame.

The re-burning structure 7 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 torch ignition starts, main district's flame (main flame) passes fire through the structural flame transfer passageway of after combustion and periphery headspace, lights and mixes room spun mixing fuel in advance, forms stable flame in advance the room top, 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 7 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 10 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 10 is extended several further turns outside the fuel bottles before connecting to the inlet end of the fuel dispenser 4. The winding part (regenerative part) of the heating pipeline 10 on the outer side of the fuel bottle 1 is designed according to the need, 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 11, the other path is connected with the premixed combustion pipeline, the premixed combustion pipeline extends to the upper part of the premixing chamber 6, a plurality of fuel spray holes are uniformly distributed on the premixed combustion pipeline above the premixing chamber 6, fuel is sprayed to the pre-burning flame, and the premixed combustion pipeline is arranged below the re-burning structure.

The utility model discloses the principle:

when the combustion chamber starts to work, fuel enters the heating pipeline, the heated fuel enters the fuel distributor and is divided into two paths or three paths after flowing through the combustion area, one path is sprayed into the premixing chamber and is fully mixed in the premixing chamber, and mixed gas is combusted outside the premixing chamber (or is partially catalyzed and combusted through the reburning structure); the other path is sprayed into the main combustion chamber through a main fuel pipeline for combustion; the flame of the main combustion zone (the flame of the main combustion chamber) is used for transferring fire to the mixed fuel sprayed out of the premixing chamber through the flame transfer channel on the afterburning structure and the peripheral reserved space of the afterburning structure, so that stable flame is formed above the premixing chamber, and then the flame continuously heats the afterburning 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. Part of the heat generated by the combustion is transferred to the fuel bottle through the heat return pipe to maintain the energy required by the fuel in the fuel bottle for evaporation.

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

Claims

1. A combustion apparatus, characterized in that: the secondary combustion structure is fixedly arranged below the main fuel pipeline, a plurality of flame transfer channels are densely distributed on the secondary combustion structure, the flame of the main combustion chamber is transferred to the mixed gas sprayed out of the premixing chamber through the flame transfer channels on the secondary combustion structure and the reserved space on the periphery of the flame transfer channels, and the mixed gas is ignited to form pre-combustion flame, the pre-burning flame heats the re-burning structure to store heat.

2. The combustion apparatus of 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. The combustion apparatus as set forth 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. The combustion apparatus of 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 combustion apparatus of claim 4, wherein: the outlet gas mixing nozzle of the premixing chamber is 1 central spray hole or more than 2 spray holes which are uniformly distributed in the circumferential direction.

6. The combustion apparatus as set forth in claim 1 or 2, wherein: the secondary combustion structure is arranged in the main combustion chamber and is positioned below the main flame, and a certain gap is formed between the periphery of the secondary combustion structure and the wall surface of the main combustion chamber; or above the premix chamber, below the main flame.

7. The combustion apparatus as set forth 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. The combustion apparatus as set forth in claim 1 or 2, wherein: the inner wall of the winding part at the upper part of the heating pipeline is coated with cracking catalyst, and the outer wall of the winding part is coated with combustion catalyst.

9. The combustion apparatus as set forth in claim 1 or 2, wherein: and a plurality of air holes are processed on the side wall surface of the main combustion chamber.

10. The combustion apparatus as set forth in claim 1 or 2, wherein: the outlet end of the fuel distributor is connected with a premixed post-combustion pipeline, the premixed post-combustion pipeline extends to the upper part of the premixing chamber, a plurality of fuel spray holes are uniformly distributed on the premixed post-combustion pipeline positioned above the premixing chamber, fuel is sprayed to the pre-combustion flame, and the fuel spray holes are arranged below the re-combustion structure.