CN108361734A - Biogas natural gas is mixed and burned electricity generation system - Google Patents
Biogas natural gas is mixed and burned electricity generation system Download PDFInfo
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- CN108361734A CN108361734A CN201810137897.0A CN201810137897A CN108361734A CN 108361734 A CN108361734 A CN 108361734A CN 201810137897 A CN201810137897 A CN 201810137897A CN 108361734 A CN108361734 A CN 108361734A
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- inner sleeve
- gas
- mixed
- biogas
- burned
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/02—Continuous combustion chambers using liquid or gaseous fuel characterised by the air-flow or gas-flow configuration
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas- turbine plants for special use
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/28—Continuous combustion chambers using liquid or gaseous fuel characterised by the fuel supply
- F23R3/36—Supply of different fuels
Abstract
Biogas natural gas is mixed and burned electricity generation system, including desulfurizing and purifying tank, surge tank, booster fan, gas electricity generator and sequentially connected conveyance conduit, and gas electricity generator includes engine block and burner, and the burner front, which is equipped with, is mixed and burned head；It includes that outer sleeve, inner sleeve and the fixing bracket for being mounted on inner sleeve on the inside of outer sleeve, outer sleeve are connected to the second fuel gas inlet to be mixed and burned head, and inner sleeve is connected to the first fuel gas inlet；Outer sleeve front end outer side is stretched out in inner sleeve front end, and inner sleeve is the tightening tube structure that front end open area is less than rear end open area, and a gas outlet and secondary gas outlet are provided on the barrel of inner sleeve front；Gas outlet, secondary gas outlet are made of multiple vertical through hole, tangential through-hole respectively.The present invention can at least improve by experiment detection 5% or more burning utilization ratio compared to existing methane utilizing system, under the conditions of identical biogas volumetric usage, preferably improve heat to electricity conversion effect.
Description
Technical field
The present invention relates to a kind of combustion gas to mix combustion using device more particularly to a kind of biogas natural gas improving efficiency of combustion
Burn electricity generation system.
Background technology
Biomass refers to the various organisms formed by photosynthesis, including all animals and plants and microorganism, according to
According to the difference in source, the biomass for being suitable for using energy source can be divided into forest resourceies, agricultural resource, sanitary sewage and industry
Five major class such as organic wastewater, municipal solid waste and feces of livestock and poultry.Wherein, the natural pond of the generations such as wastewater treatment and stalk fermentation
Gas, is a kind of extraordinary fuel gas, and combustion heat value is about 5000~5500kcal/m3, mainly by 60%~70% first
Alkane, 25%~40% carbon dioxide and a small amount of nitrogen sulfide and hydrogen sulfide composition.
To the process that biogas is utilized, the processing steps such as dehydration, desulfurization, drying are generally comprised, are then burnt again
Power generation or production hot water, steam, but since biogas calorific value is relatively low, composition is unstable, need to be passed through combustion gas when biogas is lighted a fire
It carries out combustion-supporting；On the other hand, it is easy to occur to stop working or burn during biogas combustion insufficient, leads to existing biogas
Combustion gas utilization ratio is relatively low in power generation or boiler system.
If Chinese patent (Authorization Notice No. CN205332205U) discloses " a kind of burner using air mixture ", packet
Include air intake duct, the first gas inlet pipe, the second gas inlet pipe, mixture output tube, ring-shaped connecting pipe and refractory brick；
First gas inlet pipe and the second gas inlet pipe are connected to the top and bottom of ring-shaped connecting pipe, air intake duct connection
At the middle part of ring-shaped connecting pipe between the first gas inlet pipe and the second gas inlet pipe；First gas inlet pipe, second
Gas inlet pipe and air intake duct are respectively positioned on the same side of ring-shaped connecting pipe, and mixture output tube is connected to ring-shaped connecting pipe
The other side；Mixture output tube is equipped with fixed bit, and refractory brick is fixed on fixed bit, and refractory brick is enough at a horn-like fire
Road.Compared to the prior art, the burner using air mixture which provides, can input two kinds of combustion gas simultaneously,
By the rectified action of circulating line, it is uniform to mix gas.
For another example Chinese patent (Authorization Notice No. CN202125351U) discloses a kind of " double fuel driving miniature gas thermoelectricity
Co-generation system ", including fuel gas generation subsystem and flue gas waste heat recovery subsystem, the fuel gas generation subsystem includes in combustion gas
Combustion engine, generator, three-way valve, regulating valve and connecting pipe；The flue gas waste heat recovery subsystem includes air-water heat exchange
Device, water storage water tank, water pump, three-way valve, flue gas by-pass line and connecting pipe, the combustion gas sent from air source enter combustion gas
Internal combustion engine generator group send the electric power of output to electricity consumption user；The high-temperature flue gas come out from gas internal-combustion engine is exchanged heat by air-water
Device carries out energy exchange with the water in water tank, and heat storage is got up, realizes the recycling of waste heat.The step of the system energy resources
It utilizes, under the insufficient rough sledding of methane gas producing, can guarantee the normal operation of system, focus on regenerative resource and combustion gas thermoelectricity
Coproduction integrated optimization uses, and regenerative resource, waste heat are combined with conventional energy resource and realize that the unified of energy resource system configures.
Above-mentioned and existing biogas electricity generation apparatus and system are still focused on only in technical concept from one or more
Improved or innovated on the mixed effect of combustion gas, but to limited in the improvement effect of efficiency of combustion, leads to final heat to electricity conversion
Effect is poor.
Invention content
The present invention provides a kind of biogas natural gas mixed firinor fuel burning electricity generation system, for solving individual biogas in the prior art
The problem of combustion efficiency deficiency, by combined with natural gas and layer and section burning to improve the utilization ratio of the energy.
In order to achieve the object of the present invention, using following technical scheme：
Biogas natural gas is mixed and burned electricity generation system, including desulfurizing and purifying tank, surge tank, booster fan, gas electricity generator
And sequentially connected conveyance conduit, the gas electricity generator include engine block and burner, the burner is provided with
The gas outlet of first fuel gas inlet and the second fuel gas inlet, the first fuel gas inlet and booster fan is connected by conveyance conduit, the
Two fuel gas inlets are connected to external natural gas air source；The burner front, which is equipped with, is mixed and burned head, the setting of burner rear portion
There is pressure fan, is mixed and burned head and stretches into the combustion chamber of engine block；The mixed firinor fuel burning head include outer sleeve, inner sleeve with
And the fixing bracket for being mounted on inner sleeve on the inside of outer sleeve, outer sleeve is connected to the second fuel gas inlet, inner sleeve and the
One fuel gas inlet is connected to；Outer sleeve front end outer side is stretched out in the inner sleeve front end, and inner sleeve is that front end open area is less than rear port
The tightening tube structure of area is provided with a gas outlet and secondary gas outlet on the barrel of inner sleeve front；Gas outlet,
Secondary gas outlet is made of multiple vertical through hole, tangential through-hole respectively, and a gas outlet is located at outer sleeve leading inside, it is secondary go out
Gas port is located at outer sleeve front end outer side；The vertical through hole and inner sleeve barrel are at an angle of a, the airflow direction of vertical through hole with it is outer
The airflow direction of sleeve is identical, and the angle between center line and tangent line of the tangential through-hole on inner sleeve section is b.
In order to further realize the purpose of the present invention, following technical scheme can also be used：
Biogas natural gas mixed firinor fuel burning electricity generation system as described above, ranging from 10 °~30 ° of the angle a.
Biogas natural gas mixed firinor fuel burning electricity generation system as described above, ranging from 120 °~135 ° of the angle b.
Biogas natural gas as described above is mixed and burned electricity generation system, structure of the vertical through hole on interior sleeve wall
It is more than import lateral area for outlet lateral area.
Biogas natural gas as described above is mixed and burned electricity generation system, structure of the tangential through-hole on interior sleeve wall
It is less than import lateral area for outlet lateral area.
Biogas natural gas as described above is mixed and burned electricity generation system, and the front port of the inner sleeve blocks.
Beneficial effects of the present invention：
1, the mixing burner being arranged in the present invention improves biogas by layer and section burning and utilizing for natural gas is imitated
Rate can at least improve 5% under the conditions of identical biogas volumetric usage compared to existing methane utilizing system by experiment detection
Above burning utilization ratio, preferably improves heat to electricity conversion effect.
2, biogas and natural gas are mixed and burned, in biogas production system or normal biomass ferment system aerogenesis, it is only necessary to
Want less amount of natural gas that biogas can be realized preferably to burn utilization, improve steady fuel efficiency fruit, at this point, biogas and natural gas with
Volume ratio is with 1：4~6, therefore, can it is preferential and it is larger amount of realize biogas recycling power generation；On the other hand,
When biogas production is insufficient or system production is abnormal, the present invention can facilitate the adjusting or switching for carrying out gas utilization amount,
Easy to use and management.
3, the present invention in layer and section burning by be mixed and burned head is achieved, mixed firinor fuel burning head include outer sleeve,
Inner sleeve and fixing bracket, outer sleeve are connected to the second fuel gas inlet to provide natural gas, inner sleeve and the first fuel gas inlet
Connection is to provide biogas；Inner sleeve front end is long compared with outer sleeve front end, and inner sleeve is to tighten tube structure, on the barrel of inner sleeve front
It is provided with a gas outlet and secondary gas outlet, a gas outlet, secondary gas outlet are respectively by multiple vertical through hole, tangential through-hole structure
At a gas outlet is located at outer sleeve leading inside, and secondary gas outlet is located at outer sleeve front end outer side, therefore, with inner sleeve
Become smaller from rear to the gradual internal diameter in front end, i.e. the flow area of biogas is smaller, but can still keep the biogas pressure in inner sleeve；Directly
It is at an angle of a to through-hole and inner sleeve barrel, the airflow direction of vertical through hole is identical as the airflow direction of outer sleeve, from an outlet
Mouthful outflow biogas pass through vertical through hole, therefore, can be formed between inner sleeve and housing for the first time disturb, realize with naturally
Gas air-flow preferably mixes, and is ignited after outer sleeve outflow, at this point, since biogas is mixed with portion of natural gas gas, biogas
In methane composition and calorific value improve, outside secondary gas outlet realize burning；By the marsh gas flow of a gas outlet from two
Secondary gas outlet continues to outflow, and biogas is acted on by tangential through-hole at this time, on the one hand biogas and burned flame mixing utilize interior
Sleeve, which conducts heat, improves the temperature of biogas, on the other hand, using tangentially by turning effort extend biogas mixing and burning
The path of process and time improve biogas combustion efficiency, the final preferable effect for improving heat to electricity conversion.
Description of the drawings
Fig. 1 is the structural schematic diagram of the present invention；
Fig. 2 is the structural schematic diagram that head is mixed and burned described in Fig. 1；
Fig. 3 is the structural schematic diagram of outer sleeve described in Fig. 2；
Fig. 4 is the structural schematic diagram of inner sleeve described in Fig. 2；
Fig. 5 is the A-A of Fig. 4 to enlarged cross-sectional view；
Fig. 6 is the B-B of Fig. 4 to enlarged cross-sectional view；
Fig. 7 is I close-up schematic views in Fig. 6.
Reference numeral：1- desulfurizing and purifying tanks, 2- surge tanks, 3- booster fans, 4- gas electricity generators, the first combustion gas of 5- into
Mouthful, the second fuel gas inlets of 6-, 7- outer sleeves, 8- inner sleeves, the gas outlet 81-, 811- vertical through hole, bis- gas outlets 82-,
The tangential through-holes of 821-.
Specific implementation mode
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
The every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
As shown in figs. 1-7, a kind of biogas natural gas of the present embodiment is mixed and burned electricity generation system, including desulfurizing and purifying tank, slow
Rush tank, booster fan, gas electricity generator and sequentially connected conveyance conduit.
Gas electricity generator includes engine block and burner, burner be provided with the first fuel gas inlet and the second combustion gas into
Mouthful, the gas outlet of the first fuel gas inlet and booster fan is connected by conveyance conduit, the second fuel gas inlet and external natural gas
Air source is connected to；Burner front, which is equipped with, is mixed and burned head, and burner rear portion is provided with pressure fan, is mixed and burned head and stretches into generator
In the combustion chamber of ontology.
It includes outer sleeve 7, inner sleeve 8 and the fixed branch for being mounted on inner sleeve on the inside of outer sleeve to be mixed and burned head
Frame, outer sleeve 7 are connected to the second fuel gas inlet 6, and inner sleeve 8 is connected to the first fuel gas inlet 5；Housing is stretched out in 8 front end of inner sleeve
7 front end outer sides of cylinder, inner sleeve 7 is the tightening tube structure that front end open area is less than rear end open area, on the barrel of inner sleeve front
It is provided with a gas outlet 81 and secondary gas outlet 82；Gas outlet 81, secondary gas outlet 82 are respectively by multiple vertical through hole
811, tangential through-hole 821 is constituted, and a gas outlet 81 is located at 7 leading inside of outer sleeve, before secondary gas outlet 82 is located at outer sleeve 7
End outside；Vertical through hole 811 is at an angle of a, the air-flow side of the airflow direction and outer sleeve 7 of vertical through hole 811 with inner sleeve barrel
To identical, the angle between center line and tangent line of the tangential through-hole 821 on 8 section of inner sleeve is b.
Specifically, biogas natural gas disclosed in the present embodiment is mixed and burned electricity generation system, biogas is from sewage disposal or life
After the aerogenesis apparatus such as fermentation of materials are drawn, by desulfurizing and purifying tank 1, then using 2 steady pressure of surge tank and flow velocity, through increasing
Pressure fan 3 mentions suitable gaseous-pressure, and the burner for being sent into gas electricity generator 4 burns, and thermal energy is converted non-mechanical energy
External output power.It is equipped with purification dewatering station and desulfurization chamber in desulfurizing and purifying tank 1, the net of bending is equipped in purification dewatering station
Change pipe, purification inside pipe wall is equipped with multiple radial cylinders.It is respectively equipped with air inlet and outlet in the both sides of purification dewatering station, profit
The temperature that marsh gas flow in purification pipe can be reduced with cooling blower, the moisture contained in biogas is precipitated, meanwhile, using net
Change the cylinder being arranged in pipe, makes marsh gas flow when passing through, the impurity contained in biogas and water can further be removed, and with
The inner wall for purification pipe bending is rejected to the bottom of desulfurizing and purifying tank and drains into outside tank body.Then biogas in desulfurization chamber by carrying out
Hydrogen sulfide adsorption removes.Wherein, desulfurizing and purifying tank 1, surge tank 2 size can be configured according to the rate of methane gas producing,
The setting of surge tank 2 is mainly used for steady pressure, is controlled convenient for gas electricity generator 4.The volume size of usual surge tank 2 can guarantee
Gas electricity generator 4 stablizes 5~10 minutes flows when using, to ensure that the anti-biogas output wave zone of system comes unstable
Property.
In addition natural air-air source all the way can directly connect the extra coal gas etc. of municipal gas distributing system or enterprise
Remaining combustion gas.Biogas and natural gas are mixed and burned, in biogas production system or normal biomass ferment system aerogenesis, it is only necessary to
Less amount of natural gas can be realized biogas and preferably burn utilization, improve steady fuel efficiency fruit, at this point, biogas and natural gas with body
Product ratio is with 1：4~6, therefore, can it is preferential and it is larger amount of realize biogas recycling power generation；On the other hand, when
When biogas production is insufficient or system production is abnormal, can quickly carry out the adjusting or switching of gas utilization amount, it is easy to use and
Management.
Mixed firinor fuel burning head on the present embodiment gas apparatus, including outer sleeve, inner sleeve and fixing bracket, outer sleeve and
Two fuel gas inlets are connected to provide natural gas, and inner sleeve is connected to the first fuel gas inlet to provide biogas；Inner sleeve front end is relatively outer
Barrel forward end is long, and inner sleeve is tightening tube structure, is provided with a gas outlet and secondary gas outlet on the barrel of inner sleeve front, and one
Secondary gas outlet, secondary gas outlet are made of multiple vertical through hole, tangential through-hole respectively, and one time gas outlet is located in outer sleeve front end
Side, secondary gas outlet are located at outer sleeve front end outer side, therefore, as inner sleeve becomes smaller from rear to the gradual internal diameter in front end, i.e. biogas
Flow area it is smaller, but can still keep the biogas pressure in inner sleeve；Vertical through hole is at an angle of a with inner sleeve barrel, directly
Identical to the airflow direction of through-hole and the airflow direction of outer sleeve, the biogas flowed out from a gas outlet passes through vertical through hole, because
This, can form between inner sleeve and housing and disturb for the first time, and realization is preferably mixed with gas flow, from outer sleeve stream
It is ignited after going out, at this point, since biogas is mixed with portion of natural gas gas, methane composition and calorific value in biogas improve, two
Burning is realized outside secondary gas outlet；Continue to outflow from secondary gas outlet by the marsh gas flow of a gas outlet, at this time biogas
It is acted on by tangential through-hole, on the one hand biogas and burned flame mixing improve the temperature of biogas, separately using inner sleeve heat transfer
On the one hand, using tangentially by turning effort, extend path and the time of biogas mixing and burning process.
In conjunction with a gas outlet of inner sleeve and secondary gas outlet, mutual position, structure and burning time are utilized
With the difference of effect, realizes biogas and adequately mix with natural gas, more completely burn, improve biogas combustion efficiency, most
The preferable effect for improving heat to electricity conversion eventually.
Further, as shown in Fig. 5, Fig. 6, Fig. 7, the angle a of vertical through hole is 30 ° in the present embodiment, is provided with 3 altogether
Row, the spacing between often arranging are 3~5cm, due to the tightening barrel structure that inner sleeve is taper, the flow area of all vertical through hole
Product is the 70%~80% of inner sleeve horizontal direction maximum actual internal area, so that the methane quantity of major part, it can be preferential
It is flowed out between inner sleeve and outer sleeve from a gas outlet, due to being limited by outer sleeve after the marsh gas flow outflow in vertical through hole
System, therefore under the action of the blocking of outer sleeve and itself air-flow are washed away, biogas is capable of the natural of sufficient and outer sleeve conveying
Gas mixes, and is then combusted to realize preferable burning.
The angle b of tangential through-hole is 135 °, and 10 tangential through-holes are provided on the inner sleeve section at same position, is arranged altogether
There are 5 rows, the spacing between often arranging is 2~3cm, to ensure that marsh gas flow has preferable turning effort, is flowed from secondary gas outlet
The biogas gone out is fully flowed by rotation force effect in flame, and the path of burning increases, therefore biogas may be implemented cmpletely
Burning, the actual internal areas of all vertical through hole is the 20%~40% of inner sleeve horizontal direction maximum actual internal area.
The gross area of gas outlet and secondary gas outlet is more than inner sleeve sectional area, the advantageous flowing resistance for mitigating biogas
Power realizes that better layer and section burning utilizes.
Further, in the present embodiment, structure of the vertical through hole on interior sleeve wall is that outlet lateral area is more than import
Lateral area；Structure of the tangential through-hole on interior sleeve wall is that outlet lateral area is less than import lateral area.To improve marsh gas flow
The abundant combustion of rotation in the immixture of vertical through hole, tangential through-hole.In addition, the front port of inner sleeve blocks, it is interior
The mould taper control of sleeve facilitates mixed firinor fuel burning head to be manufactured and installed at 5 °.
The present invention improves the utilization ratio of biogas and natural gas by layer and section burning, compared to existing biogas profit
The burning utilization ratio that 5% or more can be at least improved by experiment detection with system, under the conditions of identical biogas volumetric usage, compared with
Good improves heat to electricity conversion effect.
The technology contents of the not detailed description of the present invention are known technology.
Claims (5)
1. biogas natural gas be mixed and burned electricity generation system, including desulfurizing and purifying tank, surge tank, booster fan, gas electricity generator with
And sequentially connected conveyance conduit, the gas electricity generator include engine block and burner, which is characterized in that the burning
Device is provided with the first fuel gas inlet and the second fuel gas inlet, and the gas outlet of the first fuel gas inlet and booster fan passes through conveyance conduit
Connection, the second fuel gas inlet are connected to external natural gas air source；The burner front, which is equipped with, is mixed and burned head, after burner
Portion is provided with pressure fan, is mixed and burned head and stretches into the combustion chamber of engine block；The mixed firinor fuel burning head includes outer sleeve, interior
Sleeve and fixing bracket for being mounted on inner sleeve on the inside of outer sleeve, outer sleeve is connected to the second fuel gas inlet, inner sleeve
Cylinder is connected to the first fuel gas inlet；Outer sleeve front end outer side is stretched out in the inner sleeve front end, and inner sleeve is that front end open area is less than
The tightening tube structure of rear end open area is provided with a gas outlet and secondary gas outlet on the barrel of inner sleeve front；It is described primary
Gas outlet, secondary gas outlet are made of multiple vertical through hole, tangential through-hole respectively, and one time gas outlet is located in outer sleeve front end
Side, secondary gas outlet are located at outer sleeve front end outer side；The vertical through hole is at an angle of a, the gas of vertical through hole with inner sleeve barrel
It is identical as the airflow direction of outer sleeve to flow direction, the angle between center line and tangent line of the tangential through-hole on inner sleeve section
Degree is b.
2. biogas natural gas according to claim 1 is mixed and burned electricity generation system, which is characterized in that the model of the angle a
Enclose is 10 °~30 °.
3. biogas natural gas according to claim 1 is mixed and burned electricity generation system, which is characterized in that the model of the angle b
Enclose is 120 °~135 °.
4. biogas natural gas according to claim 1 is mixed and burned electricity generation system, which is characterized in that the vertical through hole exists
Structure on inner sleeve barrel is that outlet lateral area is more than import lateral area.
5. biogas natural gas according to claim 1 is mixed and burned electricity generation system, which is characterized in that the tangential through-hole exists
Structure on inner sleeve barrel is that outlet lateral area is less than import lateral area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810137897.0A CN108361734A (en) | 2018-02-10 | 2018-02-10 | Biogas natural gas is mixed and burned electricity generation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810137897.0A CN108361734A (en) | 2018-02-10 | 2018-02-10 | Biogas natural gas is mixed and burned electricity generation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108361734A true CN108361734A (en) | 2018-08-03 |
Family
ID=63005950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810137897.0A Pending CN108361734A (en) | 2018-02-10 | 2018-02-10 | Biogas natural gas is mixed and burned electricity generation system |
Country Status (1)
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110030549A (en) * | 2019-05-14 | 2019-07-19 | 江苏蓝创环保科技有限公司 | A kind of biological fuel gas mingled burning installation and technique for coal-burning boiler |
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| CN102504898A (en) * | 2011-11-21 | 2012-06-20 | 窦观一 | Poly-generation combined-type fuel comprising branches of fast-growing forests, coal and natural gas |
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