CN102853458A - Gasification methane high-efficiency energy-saving smokeless stove - Google Patents

Gasification methane high-efficiency energy-saving smokeless stove Download PDF

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Publication number
CN102853458A
CN102853458A CN2012103433392A CN201210343339A CN102853458A CN 102853458 A CN102853458 A CN 102853458A CN 2012103433392 A CN2012103433392 A CN 2012103433392A CN 201210343339 A CN201210343339 A CN 201210343339A CN 102853458 A CN102853458 A CN 102853458A
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stove
interior
gasification
valve
air collector
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CN2012103433392A
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CN102853458B (en
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韦战
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Liuzhou Jingyang Energy Conservation Technology Research and Development Ltd Co
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Liuzhou Jingyang Energy Conservation Technology Research and Development Ltd Co
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Abstract

The invention discloses a gasification methane high-efficiency energy-saving smokeless stove, comprising a combustion chamber, a ventilation barrel, an outer stove, an inner stove, a coke filtering barrel, a feeding cover, a gas collection tank, a hot water tank, a gas burner, a combustion head, a strong heat net, a methane valve, a gasification valve and a hot water valve which are all included in a stove body, a tank body and a burner, wherein the combustion chamber is arranged in an ash collection tank, the ventilation barrel is arranged in an inner stove frame, the outer stove is arranged at the outer side of the inner stove, and the inner stove is arranged at the inner side of the outer stove; the coke filtering barrel is arranged at one side of the upper end of the inner stove, and the feeding cover is arranged in a feeding port of the inner stove; the gas collection tank is arranged at the upper end of the inner stove, the hot water tank is arranged between the outer stove and the inner stove, and the gas burner is arranged at the upper end of the gas collection tank; and the combustion head is arranged at the center of the gas burner, the strong heat net is arranged on the gas burner, and the methane valve, the gasification valve and the hot water valve are arranged on the side edge of the outer stove. The gasification methane high-efficiency energy-saving smokeless stove has excellent design performance and remarkable comprehensive economic benefit and social benefit, also can use gasified methane, and is high-efficiency, energy-saving, environment-friendly, safe, convenient and durable; and the manufacture cost and the use cost are extremely low.

Description

Gasification biogas efficient energy-saving smokeless stove
Technical field
The present invention relates to a kind of energy-saving free of smoke stove, particularly a kind of gasification biogas efficient energy-saving smokeless stove.
Background technology
At present, in exhausting institute, the advocate thriftiness energy and the development and use inexpensive clean energy have become everybody common recognition and conscious action.Yet, the gasification furnace of promoting the use of in town and country at present and marsh gas stove mostly be respectively do for oneself usefulness, function singleness, gasification is impure, burning is insufficient, the thermal efficiency is not high, energy-conserving and environment-protective are low, practicality is relatively poor, system is with the high hysteresis technical products of cost, affect largely and restricted to gasify in town and country and further the popularizing and develop of biogas energy-saving work.Therefore, be necessary to invent that a kind of comprehensive technical performance is higher, gasification, and combustion fully and the utilization benefit biogas efficient energy-saving smokeless stove that more significantly gasifies.
Summary of the invention
The objective of the invention is for existing gasification furnace and marsh gas stove complex art drawback and society need, provide that a kind of project organization is exquisite, technical performance is superior, gasification biogas dual-purpose, practicality and high efficiency are convenient, safety energy-conserving environment protection, system are extremely low with cost, the extensive gasification biogas efficient energy-saving smokeless stove safeguarded of cheap, service free of the energy.
The technical scheme that the present invention adopts for achieving the above object is: a kind of gasification biogas efficient energy-saving smokeless stove, it is characterized in that, and this energy-saving free of smoke stove comprises body of heater, tank body, burner, four parts of accessory.
Described body of heater comprises the combustion chamber, ventilation tube, outer stove, interior stove, the burnt cylinder of filter, lid feeds intake, interior grate, described combustion chamber is arranged in the collection ash can and the upper end is connected with interior grate bottom side with the interior bottom side of bottom and collection ash can and is connected, described ventilation tube is arranged in the interior grate and the bottom is communicated with on passing interior grate and combustion chamber, described outer stove is arranged at the interior stove outside, and and the upper end is connected with air collector upper end outer rim and the bottom is connected with hot-water cylinder bottom side outer rim and on collecting ash can, described interior stove is arranged at that outer stove is inboard to be connected with the air collector bottom with the upper end and the bottom is connected with interior grate upside, the burnt cylinder of described filter is arranged at interior furnace upper end one side and air collector bottom side and with it inboard connection are passed in the upper end, the described lid that feeds intake is arranged in the interior stove dog-house, described interior grate is arranged at interior furnace bottom end inboard and the outside, ventilation tube bottom, and has ash-falling hole on the interior grate.
Described tank body comprises air collector, hot-water cylinder, the collection ash can, described air collector is to be connected with interior furnace upper end by inboard the connection with the lower end of upper end, bottom side and outer furnace upper end, and inboard the connection with the bottom of upper end and outer furnace upper end is connected and the formed space of interior stove upside with dog-house outer rim on the interior stove, described hot-water cylinder serve as reasons outer furnace upper end inboard with the air collector bottom side on be connected and be connected furnace upper end and be connected with lower end, air collector bottom side, and inboard with outer furnace bottom end and be connected the formed space, bottom side that is connected outside the furnace bottom end, described collection ash can is served as reasons and is connected and is connected with the outside, combustion chamber with outer stove is inboard, and hot-water cylinder bottom side and the formed space of interior grate.
Described burner comprises gas apparatus, combustion head, heat-flash net, described gas apparatus is arranged at the air collector upper end and outer rim links closely airtight with outer furnace upper end outer rim and intermediate throughholes cooperates with combustion head, described combustion head is arranged at gas apparatus center inside and bottom side and is provided with the spray combustion and chews with gasification valve one end and be communicated with, and described heat-flash net is arranged on the gas apparatus.
Described accessory comprises the biogas valve, gasification valve, hot water valve, multi-purpose cover, described biogas valve is arranged at outer stove lower end one side and wireway inner and that be communicated with the combustion chamber is communicated with, described gasification valve be arranged at outer furnace upper end one side and an end with pass that the wireway of outer stove with the air collector inboard is communicated with and the other end with pass the wireway that outer stove and the air collector air nozzle with the combustion head bottom is communicated with and be communicated with, described hot water valve is arranged at outer stove downside and the inner is communicated with hot-water cylinder, described multi-purpose cover is arranged on the ash disposal mouth of collection ash can front side, and multi-purpose cover is provided with the igniting button and air-vent is communicated with the combustion chamber is inboard.
Wherein said combustion chamber side respectively with multi-purpose cover on built-in ignitron inner be connected with the biogas valve be connected.
Wherein said ventilation tube side has air-vent.
Wherein said interior furnace upper end has dog-house and feeds intake airtight joining of lid, and the dog-house upside is connected with air collector upper end inner edge.
Wherein said heat-flash net side is closed shape such as spider reticulation, and longitude and latitude can be convex or concavity.
Wherein said gasification valve lower end is provided with external flow divider and is communicated with it.
Wherein said gas apparatus, combustion head, heat-flash net, air collector upside are concavity.
Owing to taking above-mentioned technical pattern scheme, the present invention has following beneficial effect:
The present invention's biogas efficient energy-saving smokeless stove that gasifies, because with body of heater, tank body, burner, four parts of accessory are carried out organic setting, wherein the igniting button on the assistance multi-purpose cover of combustion chamber utilizes biogas or the igniting of other ignition substance, the logical fire of ventilation tube is ventilative combustion-supporting, the support of outer stove, placement fuel and the gasification of interior stove, gasifying gas and the harmful substance isolated by filtration of the burnt cylinder of filter, support fuel and the leaching of interior grate, the collection of air collector is deposited available gas and by filtering the burnt cylinder heavy material that stays that refluxes, hot-water cylinder be filled with water and utilize interior stove and the collection ash can heat water body is carried out energy-saving heating and utilization, collect the collection ash of ash can and multi-purpose cover and biogas valve are set, the sealing air collector of gas apparatus and combustion head and support heat-flash net, combustion head gasifying gas and biogas etc. is carried out active combustion and heating, the stagnant energy heat-flash of heat-flash net, except flue gas and energy-conservation, the switching biogas of biogas valve igniting or allow biogas and gasifying gas mutually replenish and exchange use, the switching gas of gasification valve and in good time regulation and control tolerance, the cold water injection of hot water valve and open hot water, the sealing of multi-purpose cover, ash discharge, ventilative and the effect that comprehensively arranges of the new technologies such as igniting button is set, in this external gasification and the various gas-heated processes of use, because the solidifying gas of hot-water cylinder heat absorption, the anxiety cylinder is filtered gas repeatedly, the air collector gas collection is let out useless flue gas with heavy, little spray optical waves type of gas apparatus bottom side gap smoking gas and combustion head wherein fully burn and heat-flash net stagnant can heat-flash etc. the comprehensive function effect, the flue gas that impels gas apparatus can stop self and cooker produces.Overcome effectively that prior art design lags behind, comprehensively lacks, function singleness, poor practicability, the drawback such as the thermal efficiency is low, energy-conserving and environment-protective are poor and life of product is short.Impel that the present invention has that novel in design exquisite, technical performance superiorly, multi-functional can extensively use, the biogas dual-purpose that gasifies, high-efficient energy-saving environment friendly, safety convenient are durable, it is high with extremely low, the comprehensive cost performance of cost to make, the normal synthesis energy saving rate of using can reach more than 90%, and relatively reduce pollution and decrease drain synergy more than 90%.It promotes the use of economic benefit and social benefit is particularly evident.
Below in conjunction with drawings and Examples the present invention's biogas efficient energy-saving smokeless stove that gasifies is described further.
Description of drawings
Fig. 1 is the gasify structural representation of biogas efficient energy-saving smokeless stove of the present invention;
The main element label declaration:
1-biogas valve, 2-combustion chamber, 3-ventilation tube, the outer stove of 4-, stove in the 5-, the 6-gasification valve, 7-gas apparatus, 8-combustion head, 9-heat-flash net, 10-air collector, the burnt cylinder of 11-filter, the 12-lid that feeds intake, 13-hot-water cylinder, 14-hot water valve, the interior grate of 15-, 16-collection ash can, 17-multi-purpose cover.
Embodiment
As shown in Figure 1, the present invention's biogas efficient energy-saving smokeless stove that gasifies, it comprises body of heater, tank body, burner, four parts of accessory.
Described body of heater comprises combustion chamber 2, ventilation tube 3, outer stove 4, interior stove 5, the burnt cylinder 11 of filter, feed intake and cover 12, interior grate 15, described combustion chamber 2 is arranged to be connected with interior grate 15 bottom sides with the bottom with the upper end in the collection ash can 16 and is connected with collection ash can 16 interior bottom sides, its effect is to assist the igniting button on the multi-purpose cover 17 to utilize biogas or the igniting of other ignition substance, described ventilation tube 3 is arranged in the interior grate 15 and the bottom is passed interior grate 15 and is communicated with 2 upper ends, combustion chamber, its effect is that logical fire is ventilative combustion-supporting, described outer stove 4 is arranged at that interior stove 5 outsides are connected with air collector 10 upper end outer rims with the upper end and the bottom is connected with hot-water cylinder 13 bottom side outer rims and collection ash can 16 upper ends, its effect be support body of heater and with interior stove 5 and, air collector 10 sides, hot-water cylinder 13 bases form hot-water cylinder 13 to take full advantage of heat energy, and related accessory is set, described interior stove 5 is arranged at that outer stove 5 is inboard to be connected with air collector 10 bottoms with the upper end and the bottom is connected with interior grate 15 upsides, its effect is to place fuel and impel fuel gasification, the burnt cylinder 11 of described filter is arranged at interior stove 5 upper ends, one side and air collector 10 bottom sides and with it inboard connection are passed in the upper end, its effect is that gasify available gas and useless and harmful substance are carried out isolated by filtration, namely allow harmless, fuel gas pure and that proportion is lighter goes upward in the air collector 10 for subsequent use and with steam, carbon monoxide and cokeability etc. are useless, harmful substance filter is stayed and is repeatedly processed in the interior stove 5 and gasify and utilize, described feeding intake covered 12 and is arranged in interior stove 5 dog-houses, its effect is the dog-house on the stove 5 in the sealing, described interior grate 15 is arranged at inboard, interior stove 5 bottoms and the outside, ventilation tube 3 bottoms, and have ash-falling hole on the interior grate 15, its effect is to support fuel and leaching.
Described tank body comprises air collector 10, hot-water cylinder 13, collection ash can 16, described air collector 10 is to be connected with interior stove 5 upper ends by inboard the connection with the lower end of upper end, bottom side and outer stove 4 upper ends, and inboard the connection with the bottom of upper end and outer stove 4 upper ends is connected and the formed space of interior stove 5 upsides with dog-house outer rim on the interior stove 5, its effect is that collection is deposited available gas and stayed material by filtering to reflux to sink for burnt 11, described hot-water cylinder 13 serve as reasons outer stove 4 upper ends inboard with air collector 10 bottom sides on be connected and be connected stove 5 upper ends and be connected with lower end, air collector 10 bottom side, and inboard with outer stove 4 bottoms and be connected the formed space, bottom side that is connected outside stove 5 bottoms, its effect is to be filled with water and to utilize the heat of interior stove 5 and collection ash can 16 that water body is carried out energy-saving heating and utilization, described collection ash can 16 is served as reasons and is connected and is connected with 2 outsides, combustion chamber with outer stove 4 inboards, and hot-water cylinder 13 bottom sides and interior grate 15 formed spaces, its effect is the collection ash and multi-purpose cover 1 and biogas valve 2 is set.
Described burner comprises gas apparatus 7, combustion head 8, heat-flash net 9, described gas apparatus 7 is arranged at air collector 10 upper ends and outer rim links closely airtight with outer stove 4 upper end outer rims and intermediate throughholes cooperates with combustion head 8, its effect is sealing air collector 10 and combustion head 8 and supports heat-flash net 9, described combustion head 8 is arranged at gas apparatus 7 center inside and bottom side and is provided with the spray combustion and chews with gasification valve 6 one ends and be communicated with, its effect is that gasifying gas and biogas etc. is carried out active combustion and heating, described heat-flash net 9 is arranged on the gas apparatus, and its effect is stagnant energy heat-flash, removes flue gas and energy-conservation.
Described accessory comprises biogas valve 1, gasification valve 6, hot water valve 14, multi-purpose cover 17, described biogas valve is arranged at outer stove 4 lower ends, one side and wireway inner and that be communicated with combustion chamber 2 is communicated with, its effect is to open and close the biogas igniting or allow biogas and gasifying gas mutually replenish and exchange use, described gasification valve 6 be arranged at outer furnace upper end one side and an end with pass that the wireway of outer stove 4 with air collector 10 inboards is communicated with and the other end with pass the wireway that outer stove 4 and air collector 10 air nozzle with combustion head 8 bottoms is communicated with and be communicated with, its effect is to open and close gas and regulate and control tolerance in good time, described hot water valve 14 is arranged at outer stove downside and the inner is communicated with hot-water cylinder 13, its effect is to add cold water injection and open hot water, described multi-purpose cover 17 is arranged on the ash disposal mouth of collection ash can 16 front sides, and multi-purpose cover 7 is provided with igniting button and air-vent and 2 inboard connections of combustion chamber, and its effect is sealing, ash discharge, ventilative and the igniting button is set.
Wherein said combustion chamber 2 sides respectively with multi-purpose cover 17 on built-in ignitron innerly is connected the inner with the biogas valve and is connected.
Wherein said ventilation tube 3 sides have air-vent.
Wherein said interior stove 5 upper ends have dog-house and feed intake covered for 12 airtight joining, and the dog-house upside is connected with air collector 10 upper end inner edges.
Wherein said heat-flash net 9 sides are closed shape such as spider reticulation, and longitude and latitude can be convex or concavity.
Wherein said gasification valve 6 lower ends are provided with external flow divider and are communicated with it.
Wherein said gas apparatus 7, combustion head 8, heat-flash net 9, air collector 10 upsides are concavity.
Working example:
Open the gasify hot water valve 14 of biogas efficient energy-saving smokeless stove of the present invention cold water is injected hot-water cylinder 13, and with biogas valve 1 and outside biogas pipe connection, open again gas apparatus 7 and open to feed intake and cover 12 faggots that will put in order in advance, branches and leaves, the stalk stem, the combustible gas compounds such as wood health drop in the interior stove 5, then opening biogas valve 1(is about to it as having lighted a fire without biogas and closes) and simultaneously turn multi-purpose cover 17 on the igniting button light a fire (can be in igniting front opening multi-purpose cover 17 such as not have biogas, place 2 li of combustion chambers to light with igniting button or naked light in a little fuel oil or combustibles), then fire rises to from combustion chamber 2 ventilation tube 3 and the air-vent by side progressively draws the fuel of 5 bottoms of stove in the outside from bottom to top and burns gasification again, the steam that has gasified or do not gasified, carbonizing matters etc. are after filtering burnt cylinder 11 filtrations, lighter and the available gasifying gas of proportion rises in the air collector 10 collection and deposits, and the part carbonizing matter of retrogradation and moisture being back to and again being subject to gasification in the interior stove 5 and purifying and realize energy-saving and cost-reducing and remove more environmental protection of harmful smoke through filtering burnt cylinder 11 more simultaneously.At this moment, open gasification valve 6 and light the air nozzle of combustion gas 8 bottom in the gas apparatus 7 and can effectively heat cooker, heat-flash net 9 can be realized further energy-conservation by heat-flash by stagnating in the heating process.The collection ash waste heat of the partial heat energy in interior stove 5 gasifications and collection ash can 16 constantly heats the cold water in the hot-water cylinder 13 simultaneously, can obtain if need to open hot water valve 14 with hot water.The ignition knob and the stomatal closure that are about to when stopping with gas on gasification valve and the multiplex valve 17 can keep flare several days, treated to open when use next time only need open knob and pore gets final product.The situation such as visual gasification and biogas amount is carried out individual event usefulness gas or is used simultaneously gas in the use procedure, if ash amount too much can be opened multi-purpose cover 17 and manages to get rid of in the collection ash can 16.In addition, in gasification and the various gas-heated processes of use, because the solidifying gas of hot-water cylinder 13 heat absorption, anxiety cylinder 11 filter repeatedly that gas, air collector 10 gas collections fully burn with heavy little spray optical waves type of letting out useless flue gas, gas apparatus 7 bottom side gap smoking gas and combustion head wherein 8 and heat-flash net 9 stagnant can heat-flash etc. comprehensive the setting and function, the flue gas that impels gas apparatus 7 can stop self and cooker produces.Namely use gasification biogas efficient energy-saving smokeless stove, can fully realize overall economic efficiency and the social benefits such as multi-functional, energy-efficient and protection of the environment resource.
Above embodiment only is concise and to the point embodiment of the present invention; structure of the present invention is not limited to the cited form of above-described embodiment; all any modifications of doing in spirit of the present invention and principle and technology category and similar and be equal to replacement etc. all should be included in the resist technology category of the present invention.

Claims (7)

1. gasification biogas efficient energy-saving smokeless stove, it is characterized in that: described gasification biogas efficient energy-saving smokeless stove comprises body of heater, tank body, burner, four parts of accessory;
Described body of heater comprises combustion chamber (2), ventilation tube (3), outer stove (4), interior stove (5), the burnt cylinder of filter (11), lid (12) feeds intake, interior grate (15), described combustion chamber (2) is arranged at collection ash can (16) neutralization upper end and is connected with the bottom with interior grate (15) bottom side and is connected with the interior bottom side of collection ash can (16), described ventilation tube (3) is arranged in the interior grate (15) and the bottom is communicated with on passing interior grate (15) and combustion chamber (2), described outer stove (4) is arranged at interior stove (5) outside, and and the upper end is connected with air collector (10) upper end outer rim and the bottom is connected with hot-water cylinder (13) bottom side outer rim and on collecting ash can (16), described interior stove (5) is arranged at that outer stove (5) is inboard to be connected with air collector (10) bottom with the upper end and the bottom is connected with interior grate (15) upside, described filter Jiao's cylinder (11) is arranged at interior stove (5) upper end one side and air collector (10) bottom side and with it inboard connection are passed in the upper end, the described lid (12) that feeds intake is arranged in interior stove (5) dog-house, described interior grate (15) is arranged at inboard, interior stove (5) bottom and the outside, ventilation tube (3) bottom, and has ash-falling hole on the interior grate (15);
Described tank body comprises air collector (10), hot-water cylinder (13), collection ash can (16), described air collector (10) is to be connected with interior stove (5) upper end by inboard the connection with the lower end of upper end, bottom side and outer stove (4) upper end, and inboard the connection with the bottom of upper end and outer stove (4) upper end is connected and the formed space of interior stove (5) upside with dog-house outer rim on the interior stove (5), described hot-water cylinder (13) is served as reasons and is connected with air collector (10) lower end, bottom side on the stove (5) the inboard connection with upper end, air collector (10) bottom side with being connected of outer stove (4) upper end, and inboard with outer stove (4) bottom and be connected the formed space, bottom side that is connected outside stove (5) bottom, described collection ash can (16) is served as reasons and is connected and is connected with combustion chamber (2) outside with outer stove (4) is inboard, and hot-water cylinder (13) bottom side and the formed space of interior grate (15);
Described burner comprises gas apparatus (7), combustion head (8), heat-flash net (9), described gas apparatus (7) is arranged at air collector (10) upper end and outer rim links closely airtight with outer stove (4) upper end outer rim and intermediate throughholes cooperates with combustion head (8), described combustion head (8) is arranged at gas apparatus (7) center inside and bottom side and is provided with the spray combustion and chews with gasification valve (6) one ends and be communicated with, and described heat-flash net (9) is arranged on the gas apparatus;
Described accessory comprises biogas valve (1), gasification valve (6), hot water valve (14), multi-purpose cover (17), described biogas valve is arranged at outer stove (4) lower end one side and wireway inner and that be communicated with combustion chamber (2) is communicated with, described gasification valve (6) is arranged at that outer furnace upper end one side and the end wireway inboard with passing outer stove (4) and air collector (10) is communicated with and the other end and the wireway connection of passing outer stove (4) and air collector (10) air nozzle with combustion head (8) bottom and being communicated with, described hot water valve (14) is arranged at outer stove downside and the inner is communicated with hot-water cylinder (13), described multi-purpose cover (17) is arranged on the ash disposal mouth of collection ash can (16) front side, and multi-purpose cover (7) is provided with the igniting button and air-vent is communicated with combustion chamber (2) are inboard.
2. gasification biogas efficient energy-saving smokeless stove as claimed in claim 1 is characterized in that: described combustion chamber (2) side respectively with multi-purpose cover (17) on built-in ignitron innerly be connected 1 with the biogas valve) the inner is connected.
3. gasification biogas efficient energy-saving smokeless stove as claimed in claim 1, it is characterized in that: described ventilation tube (3) side has air-vent.
4. gasification biogas efficient energy-saving smokeless stove as claimed in claim 1 is characterized in that: have dog-house on the described interior stove (5) and feed intake airtight joining of lid (12), and the dog-house upside is connected with air collector (10) upper end inner edge.
5. gasification biogas efficient energy-saving smokeless stove as claimed in claim 1, it is characterized in that: described heat-flash net (9) side is closed shape such as spider reticulation, and longitude and latitude can be convex or concavity.
6. gasification biogas efficient energy-saving smokeless stove as claimed in claim 1, it is characterized in that: described gasification valve (6) lower end is provided with external flow divider and is communicated with it.
7. gasification biogas efficient energy-saving smokeless stove as claimed in claim 1, it is characterized in that: described gas apparatus (7), combustion head (8), heat-flash net (9), air collector (10) upside are concavity.
CN201210343339.2A 2012-09-17 2012-09-17 Gasification methane high-efficiency energy-saving smokeless stove Active CN102853458B (en)

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CN102853458B CN102853458B (en) 2014-10-22

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Publication number Priority date Publication date Assignee Title
CN104748157A (en) * 2013-12-25 2015-07-01 柳州市京阳节能科技研发有限公司 Multi-functional gasification biogas environment-friendly energy-saving furnace
CN105674335A (en) * 2015-12-09 2016-06-15 柳州市京阳节能科技研发有限公司 Multipurpose dual-gas environment-friendly energy-saving furnace

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US3530847A (en) * 1968-04-02 1970-09-29 Caloric Corp Gas-fueled self-cleaning oven
CN2400711Y (en) * 1999-12-01 2000-10-11 迟建科 Domestic forced-exhausting efficient three-purpose gas stove
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Publication number Priority date Publication date Assignee Title
CN104748157A (en) * 2013-12-25 2015-07-01 柳州市京阳节能科技研发有限公司 Multi-functional gasification biogas environment-friendly energy-saving furnace
CN105674335A (en) * 2015-12-09 2016-06-15 柳州市京阳节能科技研发有限公司 Multipurpose dual-gas environment-friendly energy-saving furnace

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