CN114321897A - Extract type torch combustion system and method - Google Patents
Extract type torch combustion system and method Download PDFInfo
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- CN114321897A CN114321897A CN202011081933.XA CN202011081933A CN114321897A CN 114321897 A CN114321897 A CN 114321897A CN 202011081933 A CN202011081933 A CN 202011081933A CN 114321897 A CN114321897 A CN 114321897A
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 193
- 239000000284 extract Substances 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title abstract description 7
- 239000000446 fuel Substances 0.000 claims abstract description 156
- 238000010438 heat treatment Methods 0.000 claims abstract description 34
- 238000007084 catalytic combustion reaction Methods 0.000 claims abstract description 13
- 238000002156 mixing Methods 0.000 claims abstract description 13
- 238000005338 heat storage Methods 0.000 claims abstract description 10
- 239000007788 liquid Substances 0.000 claims description 42
- 238000002347 injection Methods 0.000 claims description 31
- 239000007924 injection Substances 0.000 claims description 31
- 239000003054 catalyst Substances 0.000 claims description 20
- 238000005336 cracking Methods 0.000 claims description 7
- 238000009841 combustion method Methods 0.000 claims description 6
- 239000007921 spray Substances 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 238000004804 winding Methods 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims 2
- 230000003197 catalytic effect Effects 0.000 claims 1
- 229910010293 ceramic material Inorganic materials 0.000 claims 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 7
- 229910052799 carbon Inorganic materials 0.000 abstract description 7
- 230000003749 cleanliness Effects 0.000 abstract description 6
- 230000009977 dual effect Effects 0.000 abstract description 4
- 239000004071 soot Substances 0.000 abstract description 4
- 230000008021 deposition Effects 0.000 abstract description 3
- 239000003344 environmental pollutant Substances 0.000 abstract description 3
- 231100000719 pollutant Toxicity 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 25
- 230000000694 effects Effects 0.000 description 9
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 6
- 238000000605 extraction Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 239000001294 propane Substances 0.000 description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 238000002309 gasification Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 238000004523 catalytic cracking Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
- -1 etc.) Chemical compound 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
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- 229910052739 hydrogen Inorganic materials 0.000 description 1
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- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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- Combustion Of Fluid Fuel (AREA)
Abstract
The invention provides an extract type torch combustion system and method, which comprises a combustor and a fuel supply system, wherein the fuel supply system comprises a fuel bottle and an extract device, and the combustor 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. The invention adopts the reburning structure with dual functions of catalytic combustion and heat storage-assisted reburning, on one hand, the reburning structure accumulates heat and performs flameless combustion on the passing mixed gas, thereby further improving the reliability of the reburning, on the other hand, the mixed gas is subjected to catalytic combustion, thereby improving the combustion efficiency and cleanliness, reducing the emission of pollutants such as soot and the like, and partially eliminating the problem of carbon deposition.
Description
Technical Field
The invention relates to an extract type torch combustion system and method, and belongs to the technical field of handheld torches.
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 invention aims to overcome the defects of the prior art and provide the extract type torch combustion system and the extract type torch combustion method which can be used at low temperature, have simple structure and good flame stabilizing effect, are not easy to extinguish and can effectively reburn.
The technical solution of the invention 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 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, 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 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, a plurality of injection holes are uniformly distributed in the circumferential direction of the lower part of the premixing chamber, fuel sprayed from the premixing chamber inlet fuel nozzle and air entering the injection holes are mixed in the premixing chamber and then sprayed from the premixing chamber outlet gas mixing nozzle, the flame of the main combustion chamber is ignited by the afterburning structure and is sprayed out of the mixed gas of the premixing chamber to form pre-combustion flame;
the secondary combustion structure is densely distributed with a plurality of flame transfer channels, the secondary combustion structure is fixedly arranged below the main fuel pipeline and is positioned between the flame of the main combustion chamber and the pre-combustion flame, a combustion catalyst is attached to the surface of the secondary combustion structure and the inner wall of the flame transfer channel, the pre-combustion flame heats the secondary combustion structure for heat storage, and flameless combustion is carried out on the secondary combustion structure
An extract type torch combustion method comprises the following steps:
extracting liquid fuel;
burning in the main combustion chamber;
heating and gasifying the liquid fuel;
the air is injected in a first stage, the fuel which is heated and gasified is injected into the premixing chamber, and the injected fuel injects the air into the premixing chamber through the injection hole to form first stage injection;
premixing fuel, wherein the fuel sprayed into the premixing chamber is mixed with air injected into an injection hole of the premixing chamber;
the fuel is pre-combusted, the main flame combusted in the main combustion chamber is conducted through a flame transfer passage on the re-combustion structure and a gap reserved on the periphery of the flame transfer passage, mixed gas sprayed from the pre-mixing chamber is ignited to form pre-combustion flame, the pre-combustion flame continuously heats the re-combustion structure for heat storage, and flameless combustion is carried out on the flame transfer passage and the periphery of the flame transfer passage;
after the main combustion chamber is combusted, the flame of the main combustion chamber injects air into the main combustion chamber through a gap between the main combustion chamber and the precombustion chamber and an air hole on the main combustion chamber to form secondary injection;
and the main flame extinguishes and reburns, when the main flame burnt in the main combustion chamber is extinguished, the reburning structure accumulates heat and carries out flameless combustion on the passing mixed gas, the main combustion chamber is reignited, and the main combustion chamber is burnt again.
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention adopts the reburning structure with dual functions of catalytic combustion and heat storage-assisted reburning, on one hand, the reburning structure accumulates heat and performs flameless combustion on the passing mixed gas, thereby further improving the reliability of the reburning, on the other hand, the mixed gas is subjected to catalytic combustion, thereby improving the combustion efficiency and cleanliness, reducing the emission of pollutants such as soot and the like, and partially eliminating the problem of carbon deposition;
(2) the installation position of the re-combustion structure of the invention ensures that the re-combustion structure is easier to store heat and combust without flame, further ensures the re-combustion reliability, and ensures that the torch still works reliably and re-combusts under the working conditions of overturning, leveling, inverting, falling and the like;
(3) according to the invention, the premixing chamber provided with the injection holes is adopted, and fuel injection is carried out on air entering from the injection holes, so that the fuel is fully mixed, the flame above the premixing chamber has better rigidity, is not easy to blow out, and has better wind resistance;
(4) the invention 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 invention 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 compensates the heat absorbed by the fuel evaporation by the flame heat, thereby avoiding a regenerative system required by the gaseous fuel and simplifying the structure of the burner;
(6) according to the invention, the air inlet hole group is processed on the main combustion chamber, so that the exhaust effect under the wind condition is improved, and the flameout rate is reduced.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention (the post-combustion structure is located in the main combustion chamber);
FIG. 2 is a schematic view of a burner of the present invention (with a post-combustion configuration 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 a post-combustion structure of the present invention (end faces are circumferentially densely covered with channels, the channel cross-section is circular);
FIG. 6 is a schematic cross-sectional view of a post-combustion structure of the present invention (end faces are circumferentially densely covered with channels, the channel cross-section is square);
FIG. 7 is a cross-sectional view (in the form of a grid) of a post-combustion structure according to the present invention.
Detailed Description
The present invention will be described in detail with reference to the following examples and accompanying drawings.
The present invention, as shown in FIG. 1, provides an extract flare combustion system including a burner and a 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 combustor is shown in fig. 1 and 2 and comprises a main combustion chamber 10, a premixing chamber 8, a afterburning structure 9, a heating pipeline 12, a main fuel pipeline 7, a premixing chamber inlet fuel nozzle 13, a premixing chamber outlet gas mixing nozzle and a fuel distributor 6. After being connected with the switch valve 5, the heating pipeline 12 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 premixing chamber 8 through a premixing chamber inlet fuel nozzle 13.
The main fuel pipeline 7 extends upwards to the inside of the main combustion chamber 10, a plurality of fuel spray holes are uniformly distributed on the main fuel pipeline 7 in the main combustion chamber 10, fuel is sprayed to the main combustion chamber 10, 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 13 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 in full premixing, as shown in fig. 1 and 2, a plurality of injection holes 81 are uniformly distributed in the circumferential direction of the lower portion of the premixing chamber 8, fuel heated in the heating and reheating pipeline is injected into the premixing chamber 8 from a premixing chamber inlet fuel nozzle 11, and is mixed with air entering from the injection holes 81 to form combustible premixed gas, and then the combustible premixed gas is injected from a premixing chamber outlet gas mixing nozzle at the upper end of the premixing chamber at a relatively high speed.
According to the invention, through the arrangement and size of the injection holes and the size design of the premixing chamber (the specific design can obtain an optimal scheme through simulation optimization), under the action of the fuel injected into the premixing chamber, the air entering the premixing chamber through the injection holes is subjected to injection action, so that the fuel can be fully mixed in the premixing chamber, and the subsequent combustion is facilitated.
The premixing chamber can be in a cylindrical structure with the same diameter or variable diameter, and is divided into a lower injection area and an upper mixing area as shown in figures 1 and 2, wherein the diameter of the lower injection area is preferably smaller than that of the upper mixing area.
The fuel 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 mixed gas sprayed out of the premixing chamber is high in speed, flame rigidity is good after the combustible mixed gas is ignited, the combustible mixed gas is not easy to blow out, and wind resistance is good.
After burn structure 9 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 11, if be located main combustion chamber in, after burn structure 9 and main combustion chamber wall have certain clearance. The re-burning structure fixing seat 11 can be fixedly connected with the main burning chamber and also can be fixedly connected with a heat return pipeline through a main fuel pipeline or heating.
Fig. 1 and 2 show an installation manner of the reburning structure 9, the heating and recuperating pipeline 12 is located below the main fuel pipeline 7, the reburning structure 9 is installed in the main combustion chamber 10 and located between the main fuel pipeline 7 (main flame) and the heating and recuperating pipeline 12 (upper end), and a certain gap is formed between the periphery of the reburning structure and the wall surface of the main combustion chamber. Another installation manner of the reburning structure 9 is that the heating and heat return pipeline 12 is located below the main fuel pipeline 7, the reburning structure 9 is located below the heating and heat return pipeline 12 (upper end) and above the premixing chamber, and a certain gap is formed between the periphery of the reburning structure and the wall surface of the main combustion chamber. The after-burning structure 9 has other installation modes as long as the after-burning structure is ensured to be positioned between the flame of the main combustion chamber and the pre-burning flame.
The reburning structure 9 is a three-dimensional structure with a certain thickness, and comprises a reburning structure main body and a plurality of flame transfer channels densely distributed on the reburning structure main body, wherein a combustion catalyst is attached to the surface of the reburning structure and the inner wall of the flame transfer channel, so that the reburning structure has dual functions of catalytic combustion and heat storage-assisted reburning (better reburning effect).
The afterburning structure accumulates heat and performs flameless combustion on the mixed gas passing through, so that the reliability of afterburning is further improved, and 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 be ensured to work reliably and reburning under the working conditions of overturning, leveling, inversion, falling and the like.
As shown in FIG. 5, a re-ignition structure is provided, which comprises a re-ignition structure main body 71 and a flame transmission channel 72 densely distributed on the re-ignition structure main 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 afterburning structure 9 can be made of metal or ceramic, but is not limited thereto, as long as the afterburning structure can play a role in heat storage, and the design of specific materials, sizes and the like can be realized through 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 12 is connected with the switch valve 5, 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 pipeline 12 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 11, the other path is connected with the premixed combustion pipeline, the premixed combustion pipeline extends to the upper part of the premixing chamber 8, a plurality of fuel spray holes are uniformly distributed on the premixed combustion pipeline above the premixing chamber 8, fuel is sprayed to the pre-burning flame, and the premixed combustion pipeline is arranged below the re-burning structure.
Furthermore, the invention can add a rain-shielding structure at the outlet of the extract type torch combustion system, thereby improving the rain resistance of the torch combustion system.
The invention further provides a combustion method adopting the liquid extraction type combustor, which comprises the steps of liquid fuel extraction, main combustion chamber combustion, liquid fuel heating and gasification, primary air injection, fuel premixing, fuel pre-combustion, secondary air injection, main combustion chamber extinguishing and reburning and the like.
Liquid fuel is extracted, and liquid fuel in the fuel bottle is extracted through the liquid extracting device.
The main combustion chamber is used for combustion, and the step is prior art, and can be seen by those skilled in the art. Further, the part (heating part) of the heating pipeline wound above or below the main fuel pipeline is coated with a cracking catalyst on the inner wall of the pipe, and is coated with a combustion catalyst on the outer wall, and main flame catalytic combustion is performed in the main combustion chamber combustion step.
The liquid fuel is heated and gasified, the extracted liquid fuel is heated and gasified in the heating pipeline, and then the gasified fuel is divided into at least two paths through the outlet end of the fuel distributor, wherein one path is distributed to the premixing chamber, and the other path is distributed to the main combustion chamber. Further, the part (heating part) of the heating pipeline wound above or below the main fuel pipeline is coated with a cracking catalyst on the inner wall of the pipe and a combustion catalyst on the outer wall, and the fuel is heated and cracked in the step of heating and gasifying the liquid fuel.
And air is injected in a primary stage, the heated and gasified fuel is injected into the premixing chamber through a premixing chamber inlet fuel nozzle connected with the outlet end of the fuel distributor, and the injected fuel injects the air into the premixing chamber through the injection hole to form primary injection.
The fuel is premixed in the first stage, and the fuel sprayed into the premixing chamber is mixed with air injected into the injection hole of the premixing chamber in the premixing chamber.
The fuel pre-burns, the main flame of the main combustion chamber burns passes through the flame transfer passage on the re-burning structure and the clearance reserved on the periphery of the flame transfer passage, the mixed gas sprayed from the pre-mixing chamber is ignited, the pre-burning flame is formed, the pre-burning flame continuously heats the re-burning structure for heat storage, and flameless combustion is carried out on the flame transfer passage and the periphery of the flame transfer passage.
In the step, the surface of the re-combustion structure and the inner wall of the flame transfer channel are adhered with combustion catalysts for catalytic combustion of the fuel, and the re-combustion structure stores heat and simultaneously carries out flameless combustion.
And after the main combustion chamber is combusted, the flame of the main combustion chamber injects air into the main combustion chamber through a gap between the main combustion chamber and the precombustion chamber and an air hole on the main combustion chamber to form secondary injection.
The main flame extinguishes and reburns, when the main flame burnt in the main combustion chamber is extinguished, the reburning structure accumulates heat and carries out flameless combustion on the passing mixed gas, the main combustion chamber is re-ignited, and the main combustion chamber is burnt again.
In the step, if the surface of the re-combustion structure and the inner wall of the flame transfer channel are attached with combustion catalysts, the re-combustion structure accumulates heat and simultaneously carries out flameless combustion, the main combustion chamber is re-ignited, and the re-combustion reliability is further improved.
The principle of the invention is as follows:
when the fuel injection device starts to work, the bottle valve and the switch valve are opened, the liquid fuel in the bottle is extracted by the liquid extracting pipe and enters the heating pipe, the heated fuel enters the fuel distributor after flowing through the combustion area and is divided into two paths, one path of the heated fuel is sprayed into the premixing chamber and is fully mixed in the premixing chamber, and the mixed gas is combusted outside the premixing chamber (or is partially combusted through the catalytic combustion of 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 outer flame (main flame) of the torch is extinguished, the afterburning structure can utilize accumulated heat and simultaneously carry out flameless combustion to ignite the outer flame again so as to ensure the afterburning after flameout.
The invention has not been described in detail and is in part known to those of skill in the art.
Claims (10)
1. An extract formula torch combustion system which characterized in that: the fuel supply system comprises a fuel bottle and a liquid extracting device, the burner 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, 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 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, a plurality of injection holes are uniformly distributed in the circumferential direction of the lower part of the premixing chamber, fuel sprayed by the premixing chamber inlet fuel nozzle and air entering the injection holes are mixed in the premixing chamber and then are sprayed out from the premixing chamber outlet gas mixing nozzle, the flame of the main combustion chamber is ignited by the afterburning structure and is sprayed out of the mixed gas of the premixing chamber to form pre-combustion flame;
the secondary combustion structure is densely distributed with a plurality of flame transfer channels, the secondary combustion structure is fixedly arranged below the main fuel pipeline and is positioned between the flame of the main combustion chamber and the pre-combustion flame, a combustion catalyst is attached to the surface of the secondary combustion structure and the inner wall of the flame transfer channels, the pre-combustion flame heats the secondary combustion structure for heat storage, and flameless combustion is carried out on the secondary combustion structure.
2. The extract flare combustion system of claim 1, 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.
3. The extract flare combustion system of claim 1, 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.
4. The extract flare combustion system of claim 1, 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.
5. The extract flare combustion system of claim 1, wherein: the inner wall of the upper winding part of the heating pipeline is coated with a cracking catalyst, and the outer wall of the heating pipeline is coated with a combustion catalyst; and a plurality of air holes are processed on the side wall surface of the main combustion chamber.
6. The extract flare combustion system of claim 1, wherein: the outlet end of the fuel distributor 4 further comprises a path of outlet end connected with the premixed combustion pipeline, the premixed combustion pipeline extends to the upper part of the premixing chamber, a plurality of fuel spray holes are uniformly distributed on the premixed combustion pipeline above the premixing chamber, fuel is sprayed to the pre-combustion flame, and the outlet end is arranged below the re-combustion structure.
7. The extract flare combustion system of claim 1, 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.
8. A combustion method using the extract flare combustion system of claim 1, comprising the steps of:
extracting liquid fuel;
burning in the main combustion chamber;
heating and gasifying the liquid fuel;
the air is injected in a first stage, the fuel which is heated and gasified is injected into the premixing chamber, and the injected fuel injects the air into the premixing chamber through the injection hole to form first stage injection;
premixing fuel, wherein the fuel sprayed into the premixing chamber is mixed with air injected into an injection hole of the premixing chamber;
the fuel is pre-combusted, the main flame combusted in the main combustion chamber is conducted through a flame transfer passage on the re-combustion structure and a gap reserved on the periphery of the flame transfer passage, mixed gas sprayed from the pre-mixing chamber is ignited to form pre-combustion flame, the pre-combustion flame continuously heats the re-combustion structure for heat storage, and flameless combustion is carried out on the flame transfer passage and the periphery of the flame transfer passage;
after the main combustion chamber is combusted, the flame of the main combustion chamber injects air into the main combustion chamber through a gap between the main combustion chamber and the precombustion chamber and an air hole on the main combustion chamber to form secondary injection;
and the main flame extinguishes and reburns, when the main flame burnt in the main combustion chamber is extinguished, the reburning structure accumulates heat and carries out flameless combustion on the passing mixed gas, the main combustion chamber is reignited, and the main combustion chamber is burnt again.
9. The extract-type flare combustion method as set forth in claim 8, wherein: in the fuel pre-burning step, a burning catalyst is attached to the surface of the re-burning structure and the inner wall of the flame transfer passage, and the main flame is subjected to catalytic combustion when being ignited by the re-burning structure.
10. The extract-type flare combustion method as set forth in claim 8, wherein: in the step of heating and gasifying the liquid fuel, the fuel is heated and catalytically cracked; and the fuel is combusted in a catalytic mode in the combustion step of the main combustion chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011081933.XA CN114321897A (en) | 2020-10-12 | 2020-10-12 | Extract type torch combustion system and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011081933.XA CN114321897A (en) | 2020-10-12 | 2020-10-12 | Extract type torch combustion system and method |
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| CN114321897A true CN114321897A (en) | 2022-04-12 |
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