CN213930926U - Extract formula torch combustion system - Google Patents

Abstract

The utility model provides a liquid formula torch combustion system, including combustor and fuel supply system, fuel supply system includes fuel bottle and liquid device, and the combustor includes main combustion chamber, precombustion chamber, mixes the chamber in advance, after combustion structure, heating line, main fuel pipeline, mixes 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

Extract formula torch combustion system

Technical Field

The utility model relates to an extract formula torch combustion system 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. Particularly at low temperatures, the gaseous fuel may not be injected due to the pressure difference, making the torch difficult to start and not able to ignite smoothly.

ZL201520064425.9 provides a drawing liquid formula combustor, directly draw liquid fuel from the fuel bottle, convert liquid fuel into gaseous fuel through heating pipe and gasification chamber again, gaseous fuel is through fire hole blowout burning, though the gaseous fuel difficulty of igniting under the low temperature has been solved to a certain extent to the liquid formula of drawing, but its liquid gas conversion back, fuel directly burns, the poor very easy flame-out of steady flame effect, fuel combustion efficiency is not high simultaneously, can cause carbon deposit and soot to discharge, influence burning and polluted environment, and can't effectively after the torch is flamed out.

ZL200710087037.2 provides a gas flame ware that stabilizes, adopts gaseous fuel, and at the lower temperature, the fuel exists and probably interrupts the supply, has adopted the scheme of main combustion chamber and antechamber structurally, has played the effect of stable flame to a certain extent, but can not effectively reburn after main combustion flame extinguishes, and combustion efficiency is not high, can cause carbon deposit and soot to discharge, influences burning and polluted environment.

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 can use at low temperature, simple structure, steady flame is effectual, difficult flame-out and can effectively recombuste extract formula torch combustion system.

The technical solution of the utility model is as follows: a liquid extracting type torch combustion system comprises a combustor and a fuel supply system, wherein the fuel supply system comprises a fuel bottle and a liquid extracting device, the combustor 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, the heating pipeline is connected with the liquid extracting device of the fuel supply system and then extends to the upper part or the lower part of the main fuel pipeline to be 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 fuel distributor 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 fuel distributor 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 afterburning structure is fixedly arranged below the main fuel pipeline, and is densely distributed with a plurality of flame transmission channels, the flame of the main combustion chamber is transferred to the pre-combustion chamber through the flame transfer passage on the re-combustion structure and the reserved space on the periphery of the flame transfer passage, 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 directly extracts the liquid fuel, solves the problem of difficult starting of the torch at low temperature, arranges the evaporation phase change process of the liquid fuel at the fuel heating pipeline (the winding part of the heating pipeline) in the main flame area, and the heat absorbed by the fuel evaporation is compensated by the flame heat, thereby avoiding the need of a heat return system required by the gaseous fuel and simplifying the structure of the burner;

(6) 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 view of the burner of the present invention (the after-burning structure is located in the main combustion chamber);

FIG. 3 is a schematic view of a fuel bottle according to the present invention;

FIG. 4 is an enlarged view of FIG. 3I;

FIG. 5 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. 6 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. 7 is a schematic cross-sectional view (grid shape) of the re-combustion structure of the present invention.

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, provides an extract formula torch combustion system, including combustor and fuel supply system.

The fuel supply system is shown in fig. 3 and 4, and includes a fuel bottle 3 and a chemical solution supply device including a filter 1, a liquid extraction tube 2, a bottle valve 4, and an on-off valve 5. The liquid extracting pipe 2 is inserted into the fuel bottle 3, the lower end of the liquid extracting pipe 2 is connected with the filter body 1, the upper end of the liquid extracting pipe 2 is connected to the cylinder valve 4, the cylinder valve 4 is connected with the switch valve 5, when the combustor just works, the switch valve 5 is opened, and the liquid fuel extracted from the fuel bottle 1 by the liquid extracting pipe 2 enters the heating pipe 13 through the switch valve 5. The fuel supply system can be referred to in the prior art, such as ZL201520064425.9 liquid extraction method, and related liquid extraction method.

The burner is shown in fig. 1 and 2 and comprises a main combustion chamber 11, a pre-combustion chamber 9, a premixing chamber 8, a re-combustion structure 10, a heating pipeline 13, a main fuel pipeline 7, a premixing chamber inlet fuel nozzle 15 and a fuel distributor 6. After being connected with the switch valve 5, the heating pipeline 13 extends upwards to the upper part or the lower part of the main fuel pipeline 7 and is wound for a plurality of circles and then is connected with the inlet end of the fuel distributor 6, the outlet end of the fuel distributor 6 is divided into at least two paths, one path is connected with the main fuel pipeline 7, and the other path is connected with the bottom of the premixing chamber 8 through a premixing chamber inlet fuel nozzle 15.

The main fuel pipeline 7 extends upwards to the inside of the main combustion chamber 11, a plurality of fuel spray holes are uniformly distributed on the main fuel pipeline in the main combustion chamber 11, fuel is sprayed to the main combustion chamber 11, 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 inlet fuel nozzle 15 of the premixing chamber is connected with the bottom of the premixing chamber 8, 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 8.

The premixing chamber 8 plays a role of primary premixing, and the flame stabilizing performance of the precombustion chamber can be further improved. As shown in fig. 1 and 2, a plurality of injection holes 81 are uniformly distributed in the circumferential direction at the lower part of the premixing chamber 8, the fuel heated in the heating pipeline is injected into the premixing chamber 8 from the premixing chamber inlet fuel nozzle 15, and is mixed with the air entering from the injection holes 81 to form a first-stage combustible premixed gas, and then is injected into the precombustion chamber 9 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 9, 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, utilize 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 reburning structure 10 is fixedly arranged at the lower part of the main combustion chamber or the middle upper part of the precombustion chamber, is positioned between the flame of the main combustion chamber and the flame of the precombustion chamber, and is fixed by a reburning structure fixing seat 12, and a certain gap is reserved between the reburning structure 8 and the wall surface of the main combustion chamber or the precombustion chamber. The re-combustion structure fixing seat 12 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 and 2 show an installation mode of the afterburning structure 10, in which the heating pipeline 13 is located below the main fuel pipeline 7, and the afterburning structure 10 is installed in the main combustion chamber 11 and located between the main fuel pipeline 7 (main flame) and the heating pipeline 13 (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 re-combustion structure 10 is that the heating pipeline 13 is located below the main fuel pipeline 7, the re-combustion structure 10 is installed at the middle upper part of the pre-combustion chamber 9, and is located between the heating pipeline 13 (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. 5, 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. 5), square (as shown in FIG. 6), or other shapes. As shown in FIG. 7, 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 13 is connected with the switch valve 5, and then extends upwards to the upper part or the lower part of the main fuel pipeline 7 and is connected with the inlet end of the fuel distributor 6 after being wound for a plurality of circles. Further optimize, the heating line 13 is at the winding position (heating part) of main fuel pipeline 7 top or below, and the cracking catalyst is coated to the inner wall, and the burning catalyst is coated to the outer wall, can further improve combustion efficiency and burning cleanliness factor. 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 6 is divided into at least three paths, one path is connected with the main fuel pipeline 7, the other path is connected with the premixing chamber inlet fuel nozzle 15, the other path is connected with the precombustion chamber fuel pipeline 14, the precombustion chamber fuel pipeline extends into the precombustion chamber 9, a plurality of fuel spray holes are uniformly distributed on the precombustion chamber fuel pipeline in the precombustion chamber, fuel is sprayed to the precombustion chamber 9, and the fuel spray holes are arranged below the re-combustion structure.

Furthermore, the utility model discloses can increase the structure of keeping off the rain in the export of extract formula torch combustion system, improve torch combustion system's anti rain ability.

The utility model discloses the principle:

when the device starts to work, a bottle valve and a switch valve are opened, a liquid extracting pipe extracts liquid fuel in a bottle, the liquid fuel enters a heating pipeline, the heated fuel enters a fuel distributor to be divided into two paths or three paths after flowing through a combustion area, one path of the heated fuel is sprayed into a premixing chamber to be mixed for the first time, then the mixed fuel is sprayed into a 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 a precombustion chamber fuel pipeline), and mixed gas is combusted in the precombustion chamber (or part of the mixed gas is catalyzed and combusted through a re-combustion 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 (10)

1. An extract formula torch combustion system which characterized in that: the burner comprises a main combustion chamber, a precombustion chamber, a premixing chamber, a re-combustion structure, a heating pipeline, a main fuel pipeline, a premixing chamber inlet fuel nozzle and a fuel distributor, wherein the heating pipeline is connected with the liquid extracting device of the fuel supply system, 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 is connected with the main fuel pipeline, the main fuel pipeline extends upwards into the main combustion chamber, the other path 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 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, and flames of the main combustion chamber transfer to the precombustion chamber through the flame transfer channels on the re-combustion structure and the reserved space, and igniting the flame in the pre-combustion chamber, and heating the re-combustion structure by the flame in the pre-combustion chamber to store heat.

2. The extract flare combustion system 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. An extract flare combustion system as defined 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.

4. An extract flare combustion system as defined in claim 1 or 2, wherein: the premixing chamber is of a cylindrical structure with the same diameter or variable diameter and comprises an injection area and a mixing area, and a plurality of injection holes are uniformly distributed at the lower part of the injection area of the premixing chamber in the circumferential direction.

5. An extract flare combustion system as defined 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.

6. An extract flare combustion system as defined 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.

7. An extract flare combustion system as defined 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.

8. An extract flare combustion system as defined 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.

9. An extract flare combustion system as defined in claim 1 or 2, wherein: the liquid extracting device comprises a filtering body, a liquid extracting pipe, a bottle valve and a switch valve, wherein the liquid extracting pipe is inserted into the fuel bottle, the lower end of the liquid extracting pipe is connected with the filtering body, the upper end of the liquid extracting pipe is connected to the bottle valve, and the bottle valve is connected with the switch valve.

10. An extract flare combustion system as defined in claim 1 or 2, 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.

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