CN114321896A - Torch combustion system and combustion method - Google Patents
Torch combustion system and combustion method Download PDFInfo
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- CN114321896A CN114321896A CN202011081920.2A CN202011081920A CN114321896A CN 114321896 A CN114321896 A CN 114321896A CN 202011081920 A CN202011081920 A CN 202011081920A CN 114321896 A CN114321896 A CN 114321896A
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 207
- 238000009841 combustion method Methods 0.000 title claims abstract description 10
- 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 12
- 238000005338 heat storage Methods 0.000 claims abstract description 10
- 238000002347 injection Methods 0.000 claims description 39
- 239000007924 injection Substances 0.000 claims description 39
- 239000003054 catalyst Substances 0.000 claims description 19
- 238000002156 mixing Methods 0.000 claims description 11
- 238000005336 cracking Methods 0.000 claims description 7
- 230000000087 stabilizing effect Effects 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 230000003197 catalytic effect Effects 0.000 claims 1
- 229910010293 ceramic material Inorganic materials 0.000 claims 1
- 230000008929 regeneration Effects 0.000 claims 1
- 238000011069 regeneration method Methods 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
- 230000008021 deposition Effects 0.000 abstract description 3
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- 239000007789 gas Substances 0.000 description 34
- 230000000694 effects Effects 0.000 description 12
- 239000012071 phase Substances 0.000 description 11
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 8
- 239000003381 stabilizer Substances 0.000 description 6
- 230000001172 regenerating effect Effects 0.000 description 5
- 239000007921 spray Substances 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 239000001294 propane Substances 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000005457 optimization Methods 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
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- 239000000779 smoke 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
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- 239000003546 flue gas Substances 0.000 description 1
- 239000007792 gaseous phase Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 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
Abstract
The invention provides a torch combustion system and a combustion method, which comprise a combustor and a fuel supply system, wherein the combustor comprises a main combustion chamber, a pre-combustion chamber, a premixing chamber, a re-combustion structure, a heating and heat return pipeline, a main fuel pipeline, a premixing chamber inlet fuel 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 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 a torch combustion system and a combustion 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.
ZL200710087037.2 provides a gas flame ware that stabilizes, adopts gaseous fuel, has structurally adopted the scheme of main combustion chamber and precombustion chamber, has played flame stabilization's effect to a certain extent, nevertheless can not effectively reburn after main burning flame extinguishes, and combustion efficiency is not high simultaneously, can cause carbon deposit and soot to discharge, influences burning and polluted environment.
ZL201320016728.4 provides a prevent handheld torch of stifling, and ZL201220614046.9 provides a torch with the combustion-supporting device of oxygen supply, has all increased the apparatus of oxygen supply in the torch, can increase extra device on the one hand, and oxygen and gaseous fuel supply cooperation are difficult to be controlled, and on the other hand these two structures all do not have the effect of stable flame, easily extinguish and can't effectively reburn, and combustion efficiency is not high simultaneously.
ZL200620055362.1 provides prevent wind-proof rain-proof torch combustor, and ZL200620056314.4 provides the super steady state combustor for the torch, all adopts the burning of interior outer lane to prevent that flame from extinguishing, but the effect of outer lane also does not have stable flame in these two structures equally, extinguishes and can not effectively after burning, and the not high existence carbon deposit of combustion efficiency simultaneously.
The metal windproof sheet is additionally arranged above the combustion port of the torch, when the torch is normally combusted, the windproof sheet is heated, and when flame is extinguished by wind, the windproof sheet is utilized to keep high temperature to ignite fuel again, so that the recombustion effect is achieved. For example, CN201020280148.2 provides a combustion device for a torch, in which a high melting point metal member (such as a tungsten wire) is disposed at a combustion port, the torch heats the tungsten wire after ignition, and when the flame is extinguished by wind, the fuel is re-ignited by the high temperature tungsten wire. The re-burning mode is not easy to maintain high temperature to re-ignite the fuel, and if the torch is in the working conditions of turning, leveling, inversion, falling and the like, the re-burning effect is not good. Still some torches install the purpose that the relight igniter reached the relight torch additional, but torch structure is complicated, and the ignition effect is not good.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a torch combustion system and a torch combustion method which are simple in structure, good in flame stabilizing effect, high in combustion efficiency, not easy to extinguish and capable of effectively reburning.
The technical solution of the invention is as follows: a torch combustion system comprises a combustor and a fuel supply system, wherein the fuel supply system comprises a fuel bottle and a gas-phase pressure stabilizing device, the combustor comprises a main combustion chamber, a precombustion chamber, a premixing chamber, a re-combustion structure, a heating and heat-returning pipeline, a main fuel pipeline, a premixing chamber inlet fuel nozzle and a fuel distributor, the heating and heat-returning pipeline is connected with the fuel supply system, extends to the upper part or the lower part of the main fuel pipeline after being wound for a plurality of circles and then extends to the outer side of the fuel bottle, the main fuel pipeline 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, the upper end of the premixing chamber is connected with the precombustion chamber, a plurality of pre-combustion holes are uniformly distributed at the circumference 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 sprayed into the injection hole The flame of the main combustion chamber is ignited by the secondary combustion structure and sprayed into the mixed gas in the pre-combustion chamber to form the flame of the pre-combustion chamber;
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 flame of the pre-combustion chamber, a combustion catalyst is attached to the surface of the secondary combustion structure and the inner wall of the flame transfer channel, the flame of the pre-combustion chamber heats the secondary combustion structure for heat storage, and flameless combustion is carried out on the secondary combustion structure.
A flare combustion method comprising the steps of:
a supply of gaseous fuel;
burning in the main combustion chamber;
heating and backheating fuel;
injecting air in a primary injection mode, injecting fuel into the premixing chamber, and injecting the injected fuel into the premixing chamber through the injection holes to form primary injection;
the fuel is premixed in a first stage, and the fuel sprayed into the premixing chamber is mixed with air injected into the injection hole of the premixing chamber;
the air is injected into the precombustion chamber in a secondary injection mode, the fuel is injected into the precombustion chamber from the premixing chamber after the primary premixing, and the injected mixed gas injects the air into the precombustion chamber through an air inlet hole of the precombustion chamber to form secondary injection;
the fuel is subjected to secondary premixing/precombustion, the mixed gas sprayed into the precombustion chamber from the premixing chamber and the air injected into the precombustion chamber are subjected to secondary premixing, main flames combusted in the main combustion chamber are subjected to fire transfer through a flame transfer passage on the reburning structure and a clearance reserved at the periphery of the flame transfer passage, the secondary premixed fuel in the precombustion chamber is ignited, precombustion flames are formed in the precombustion chamber, the precombustion flames continuously heat the reburning structure for heat storage, and flameless combustion is carried out at the flame transfer passage and the periphery of the flame transfer passage;
after the main combustion chamber is combusted, 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 air holes on the main combustion chamber to form three-stage 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 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 structural form of 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 invention adopts the heating and heat-returning pipeline with dual functions of catalytic combustion and catalytic cracking, thereby further improving the combustion efficiency and the combustion cleanliness;
(5) according to the invention, the hole group is processed on the main combustion chamber, so that the air intake and exhaust effects under the windy working condition are 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 gas flame stabilizer according to the present invention (a reburning structure is located in a 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 a flare combustion system including a burner and a fuel supply system.
The fuel supply system comprises a fuel bottle 1 and a gas phase pressure stabilizer 3, a bottle valve 2 is fixed at the mouth of the fuel bottle 1, the gas phase pressure stabilizer 3 is connected with the bottle valve 2, when the burner just works, the gas phase pressure stabilizer 3 and the bottle valve 2 are opened, high-pressure gas phase fuel steam (such as propane and the like) in the bottle is decompressed in the gas phase pressure stabilizer 3 through the bottle valve 2 and is maintained near a certain relatively stable pressure value, and then enters a heating and heat return pipe 10. Specific fuel supply system designs are known in the art.
The burner is shown in fig. 1 and 2 and comprises a main combustion chamber 9, a pre-combustion chamber 7, a premixing chamber 6, a re-combustion structure 8, a heating and regenerative pipeline 11, a main fuel pipeline 5, a premixing chamber inlet fuel nozzle 13 and a fuel distributor 4. The heating and heat-returning pipeline 11 is connected with the gas-phase pressure stabilizer 3, extends upwards to the upper part or the lower part of the main fuel pipeline 5, winds a plurality of circles and then extends to the outer side of the fuel bottle 1, winds a plurality of circles and then is connected with the inlet end of the fuel distributor 4, the outlet end of the fuel distributor 4 is divided into at least two paths, one path is connected with the main fuel pipeline 5, and the other path is connected with the bottom of the premixing chamber 6 through a premixing chamber inlet fuel nozzle 13.
The main fuel pipeline 5 extends upwards to the inside of the main combustion chamber 9, a plurality of fuel spray holes are uniformly distributed on the main fuel pipeline in the main combustion chamber 9, fuel is sprayed to the main combustion chamber 9, and combustion in the main combustion chamber is carried out to form main flame. The side wall surface of the main combustion chamber is provided with a plurality of air holes, so that the discharge speed of the flue gas flowing back into the torch under the windy condition is increased, and the flame-out of the torch is avoided. Meanwhile, under the normal working condition, the air entering from the hole groups under the injection action of the main flame increases the air quantity participating in torch combustion, and is beneficial to improving the combustion efficiency and reducing the pollution emission.
The premixing chamber inlet fuel nozzle 13 is connected with the bottom of the precombustion chamber 6, 1 (center) or more than 2 (circumferentially and uniformly distributed) spray holes can be arranged at the connection part, and fuel is sprayed from the bottom of the premixing chamber 6.
The premixing chamber 6 plays a role of primary premixing, and the flame stabilizing performance of the precombustion chamber can be further improved. As shown in fig. 1 and 2, a plurality of injection holes 61 are uniformly distributed in the circumferential direction at the lower part of the premixing chamber 6, the fuel heated in the heating and heat-returning pipeline is injected into the premixing chamber 6 from the premixing chamber inlet fuel nozzle 13, and is mixed with the air entering from the injection holes 61 to form a first-stage combustible premixed gas, and then the first-stage combustible premixed gas is injected into the precombustion chamber from the premixing chamber outlet gas mixing nozzle at the upper end of the premixing chamber at a relatively high speed and is further mixed with the air entering the precombustion chamber, so that the first-stage premixing of the precombustion chamber is increased into two-stage premixing.
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 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, a secondary injection effect is formed in the precombustion chamber, the increase of the air flow entering the precombustion chamber is facilitated, and the mixing of the high-speed combustible mixed gas and fuel is enhanced. Meanwhile, the pre-combustion flame after pre-mixing has high energy density and better heating effect on a re-combustion structure.
And an air inlet is formed on the side wall surface at the bottom or the lower part of the precombustion chamber, and air enters the precombustion chamber through the air inlet and is subjected to secondary mixing with the primary mixed fuel sprayed by the premixing chamber at the lower part of the precombustion chamber.
The re-combustion structure 8 is fixedly arranged at the lower part of the main combustion chamber or the middle upper part of the pre-combustion chamber, is positioned between the flame of the main combustion chamber and the flame of the pre-combustion chamber, and is fixed by a re-combustion structure fixing seat 10, and a certain gap is reserved between the re-combustion structure 8 and the wall surface of the main combustion chamber or the pre-combustion chamber. The re-combustion structure fixing seat 10 can be fixedly connected with the pre-combustion chamber or the main combustion chamber, and can also be fixedly connected with a heat return pipeline through a main fuel pipeline or heating.
Fig. 1 and 2 show an installation manner of the afterburning structure 8, the heating and backheating pipeline 11 is located below the main fuel pipeline 5, the afterburning structure 8 is installed in the main combustion chamber 9 and located between the main fuel pipeline 5 (main flame) and the heating and backheating pipeline 11 (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 mode of the reburning structure 8 is that the heating and heat return pipeline 11 is located below the main fuel pipeline 5, the reburning structure 8 is installed at the middle upper part of the precombustion chamber 7 and is located between the heating and heat return pipeline 11 (lower end part) and the precombustion flame, and a certain gap is formed between the periphery of the reburning structure and the wall surface of the precombustion chamber. The afterburner structure 8 can be mounted in other ways as long as it is located between the main and prechamber flames.
The reburning structure 8 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 post-combustion structure 8 may be made of metal or ceramic, but is not limited thereto, as long as it can perform the functions of heat storage and adhesion of a combustion catalyst, 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 and heat return pipeline 11 is connected with the gas-phase pressure stabilizing device 3, extends upwards to the upper part or the lower part of the main fuel pipeline 5, winds a plurality of circles and then extends to the outer side of the fuel bottle 1, and winds a plurality of circles and then is connected with the inlet end of the fuel distributor 4. Further optimization, the part (heating part) of the heating and regenerative pipeline 11 wound above or below the main fuel pipeline 5 is coated with a cracking catalyst on the inner wall of the pipe, and a combustion catalyst on the outer wall of the pipe, 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 winding part (regenerative part) of the heating and regenerative tube 11 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. 1, or may be spiral or other forms.
The cracking catalyst is used for catalytically cracking fuel, and the combustion catalyst is used for catalytically combusting the fuel, and the type of the combustion catalyst is determined according to the type of the fuel and is a well-known technology in the field.
Furthermore, the outlet end of the fuel distributor 4 is divided into at least three paths, one path is connected with the main fuel pipeline 5, the other path is connected with the premixing chamber inlet fuel nozzle, the other path is connected with the precombustion chamber fuel pipeline 12, the precombustion chamber fuel pipeline extends into the precombustion chamber 7, a plurality of fuel spray holes are uniformly distributed on the precombustion chamber fuel pipeline in the precombustion chamber to spray fuel to the precombustion chamber 7, and the precombustion chamber fuel pipeline is arranged below the re-combustion structure.
Furthermore, the wind and rain resistant structure can be added at the outlet of the torch combustion system, so that the wind and rain resistant capability of the torch combustion system is improved.
The invention further provides a combustion method adopting the torch combustion system, which comprises the steps of gas fuel supply, main combustion chamber combustion, fuel heating and back heating, air primary injection, fuel primary premixing, air secondary injection, fuel secondary premixing/pre-combustion, air tertiary injection, main combustion chamber extinguishment and re-combustion and the like.
The steps of gas fuel supply, main combustion chamber combustion, fuel heating and recuperation are prior art and will be apparent to those skilled in the art. Further, at the wound part (heating part) of the fuel heating and heat return pipeline above or below the main fuel pipeline, the inner wall of the pipe is coated with a cracking catalyst, the outer wall is coated with a combustion catalyst, main flame catalytic combustion is performed in the combustion step of the main combustion chamber, and fuel heating and cracking are performed in the fuel heating and heat return step.
And air is injected in a primary injection mode, 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 holes 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.
And air is injected into the precombustion chamber in a secondary injection mode, the fuel is injected into the precombustion chamber from the premixing chamber after the primary premixing, and the injected mixed gas injects the air into the precombustion chamber through an air inlet hole of the precombustion chamber to form secondary injection.
And (2) performing secondary premixing/precombustion on fuel, wherein the mixed gas sprayed into the precombustion chamber from the premixing chamber and the air injected into the precombustion chamber are subjected to secondary premixing, main flame combusted in the main combustion chamber is ignited through a flame transfer passage on the afterburning structure and a clearance reserved at the periphery of the flame transfer passage to ignite the fuel subjected to secondary premixing in the precombustion chamber, precombustion flame is formed in the precombustion chamber, the precombustion flame continuously heats the afterburning structure for heat storage, and flameless combustion is performed at 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 three-stage 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 reignited, and the main combustion chamber is burnt again.
The surface of the re-burning structure and the inner wall of the flame transfer channel are attached with a combustion catalyst, the re-burning structure accumulates heat and simultaneously carries out flameless combustion, the main combustion chamber is re-ignited, and the re-burning reliability is further improved.
The principle of the invention is as follows:
when the device starts to work, a cylinder valve and a gas-phase pressure stabilizing device are opened, high-pressure gas-phase fuel steam in a cylinder is decompressed by the gas-phase pressure stabilizing device and is maintained near a certain relatively stable pressure value, the steam enters a heating and regenerative pipeline, the heated fuel enters a fuel distributor to be divided into two paths or three paths after flowing through a pre-combustion chamber and a fuel cylinder, one path of the heated fuel is sprayed into the pre-combustion chamber to carry out primary mixing, and then is sprayed into the pre-combustion chamber to carry out secondary mixing with air in the pre-combustion chamber (and the other path of the heated fuel is sprayed into the pre-combustion chamber through a fuel pipeline of the pre-combustion chamber), and mixed gas is combusted in the pre-combustion 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 outer flame (main flame) of the torch is extinguished, the afterburning structure can ignite the outer flame again by using the accumulated heat to perform flameless combustion so as to ensure the 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 invention has not been described in detail and is in part known to those of skill in the art.
Claims (10)
1. A flare combustion system, characterized by: the fuel supply system comprises a fuel bottle and a gas phase pressure stabilizing device, the burner comprises a main combustion chamber, a precombustion chamber, a premixing chamber, a reburning structure, a heating and heat return pipeline, a main fuel pipeline, a premixing chamber inlet fuel nozzle and a fuel distributor, the heating and heat return pipeline is connected with the fuel supply system, extends to the upper part or the lower part of the main fuel pipeline after being wound for a plurality of circles and then extends to the outer side of the fuel bottle, the heating and heat return pipeline is connected with the inlet end of the fuel distributor after being wound for a plurality of circles, 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, a plurality of injection holes are uniformly distributed on the circumference of the lower part, fuel sprayed by the premixing chamber inlet fuel nozzle and air entering the injection holes are mixed in the precombustion chamber, the flame of the main combustion chamber is ignited by the secondary combustion structure and sprayed into the mixed gas in the pre-combustion chamber to form the flame of the pre-combustion chamber;
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 flame of the pre-combustion chamber, a combustion catalyst is attached to the surface of the secondary combustion structure and the inner wall of the flame transfer channel, the flame of the pre-combustion chamber heats the secondary combustion structure for heat storage, and flameless combustion is carried out on the secondary combustion structure.
2. A flare combustion system as defined in 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. A flare combustion system as 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. A flare combustion system as 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.
5. A flare combustion system as in claim 1 or 2, wherein: the inner wall of the heating and heat return pipeline is coated with a cracking catalyst, and the outer wall of the heating and heat return pipeline is coated with a combustion catalyst.
6. A flare combustion system as 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.
7. A flare combustion system as 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.
8. A combustion method using the flare combustion system of claim 1, comprising the steps of:
a supply of gaseous fuel;
burning in the main combustion chamber;
heating and backheating fuel;
injecting air in a primary injection mode, injecting fuel into the premixing chamber, and injecting the injected fuel into the premixing chamber through the injection holes to form primary injection;
the fuel is premixed in a first stage, and the fuel sprayed into the premixing chamber is mixed with air injected into the injection hole of the premixing chamber;
the air is injected into the precombustion chamber in a secondary injection mode, the fuel is injected into the precombustion chamber from the premixing chamber after the primary premixing, and the injected mixed gas injects the air into the precombustion chamber through an air inlet hole of the precombustion chamber to form secondary injection;
the fuel is subjected to secondary premixing/precombustion, the mixed gas sprayed into the precombustion chamber from the premixing chamber and the air injected into the precombustion chamber are subjected to secondary premixing, main flames combusted in the main combustion chamber are subjected to fire transfer through a flame transfer passage on the reburning structure and a clearance reserved at the periphery of the flame transfer passage, the secondary premixed fuel in the precombustion chamber is ignited, precombustion flames are formed in the precombustion chamber, the precombustion flames continuously heat the reburning structure for heat storage, and flameless combustion is carried out at the flame transfer passage and the periphery of the flame transfer passage;
after the main combustion chamber is combusted, 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 air holes on the main combustion chamber to form three-stage 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. A flare combustion method as defined in claim 8, wherein: in the fuel secondary premixing/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; in the fuel heating and heat regeneration step, 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.
10. A flare combustion method as defined in claim 8, wherein: and the fuel secondary premixing/precombustion step is to carry out secondary premixing on the mixed gas sprayed into the precombustion chamber from the premixing chamber and the fuel sprayed into the precombustion chamber and the air injected into the precombustion chamber.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011081920.2A CN114321896A (en) | 2020-10-12 | 2020-10-12 | Torch combustion system and combustion method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011081920.2A CN114321896A (en) | 2020-10-12 | 2020-10-12 | Torch combustion system and combustion method |
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| DE4220862A1 (en) * | 1991-06-29 | 1993-01-07 | Nakajima Copper Works Inc | METHOD FOR BURNING GAS AND DEVICE FOR CARRYING OUT THE METHOD |
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| CN202598520U (en) * | 2012-03-20 | 2012-12-12 | 永康市博一炉具有限公司 | Double-section high fire energy-saving and environment-friendly burner |
| CN204494388U (en) * | 2014-01-22 | 2015-07-22 | 山西佳新能源化工实业有限公司 | A kind of methanol fuel catalytic pyrolysis stove reactor |
| CN210861090U (en) * | 2019-06-19 | 2020-06-26 | 华帝股份有限公司 | Gas torch |
| CN111656086A (en) * | 2017-12-01 | 2020-09-11 | 新富士燃烧器株式会社 | Torch |
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2020
- 2020-10-12 CN CN202011081920.2A patent/CN114321896A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4220862A1 (en) * | 1991-06-29 | 1993-01-07 | Nakajima Copper Works Inc | METHOD FOR BURNING GAS AND DEVICE FOR CARRYING OUT THE METHOD |
| CN101201165A (en) * | 2007-03-15 | 2008-06-18 | 中国航天科工集团公司第三研究院第三十一研究所 | Device for combusting stably of gas flame torch |
| CN202598520U (en) * | 2012-03-20 | 2012-12-12 | 永康市博一炉具有限公司 | Double-section high fire energy-saving and environment-friendly burner |
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| CN111656086A (en) * | 2017-12-01 | 2020-09-11 | 新富士燃烧器株式会社 | Torch |
| CN210861090U (en) * | 2019-06-19 | 2020-06-26 | 华帝股份有限公司 | Gas torch |
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