CN111322153A - Method and system for generating power by utilizing methane - Google Patents
Method and system for generating power by utilizing methane Download PDFInfo
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- CN111322153A CN111322153A CN201911391407.0A CN201911391407A CN111322153A CN 111322153 A CN111322153 A CN 111322153A CN 201911391407 A CN201911391407 A CN 201911391407A CN 111322153 A CN111322153 A CN 111322153A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B43/00—Engines characterised by operating on gaseous fuels; Plants including such engines
- F02B43/10—Engines or plants characterised by use of other specific gases, e.g. acetylene, oxyhydrogen
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B63/00—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices
- F02B63/04—Adaptations of engines for driving pumps, hand-held tools or electric generators; Portable combinations of engines with engine-driven devices for electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D29/00—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto
- F02D29/06—Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential to engine operation, e.g. controlling of engines by signals external thereto peculiar to engines driving electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0002—Controlling intake air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/0025—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D41/0027—Controlling engines characterised by use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures the fuel being gaseous
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D41/00—Electrical control of supply of combustible mixture or its constituents
- F02D41/02—Circuit arrangements for generating control signals
- F02D41/14—Introducing closed-loop corrections
- F02D41/1438—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor
- F02D41/1473—Introducing closed-loop corrections using means for determining characteristics of the combustion gases; Sensors therefor characterised by the regulation method
- F02D41/1475—Regulating the air fuel ratio at a value other than stoichiometry
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/0203—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels characterised by the type of gaseous fuel
- F02M21/0215—Mixtures of gaseous fuels; Natural gas; Biogas; Mine gas; Landfill gas
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M21/00—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form
- F02M21/02—Apparatus for supplying engines with non-liquid fuels, e.g. gaseous fuels stored in liquid form for gaseous fuels
- F02M21/04—Gas-air mixing apparatus
- F02M21/045—Vortex mixer
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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- Engineering & Computer Science (AREA)
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
The invention discloses a method and a system for generating power by utilizing marsh gas, which are characterized by comprising a step for controlling air-fuel ratio parameters of mixed fuel gas according to externally input information. According to the method and the system for generating power by utilizing methane, provided by the invention, the parameter of the required combustible ratio is obtained by detecting the external equipment, and the parameter of the current combustible ratio is obtained by detecting the system by the sensor, so that the mixing of the methane and the air is controlled according to the comparison result of the parameter of the required combustible ratio and the parameter of the current combustible ratio, thereby realizing thin combustion, ensuring sufficient energy input, avoiding the phenomena of tempering, blasting and the like, and improving the economic efficiency and the safety performance of the power generation system.
Description
Technical Field
The invention relates to the technical field of new energy environmental protection, in particular to a method and a system for generating power by utilizing methane.
Background
The methane is a high-quality energy source and a greenhouse gas, and if the methane is not utilized, the energy source is wasted, and the environment is seriously polluted. Various technologies for comprehensively utilizing biogas exist in the prior art, and the utilization of biogas for power generation is also a technical problem which is solved in the prior art. For example, the patent office of the intellectual property office discloses a biogas power generation method in 2019, 6, month and 11, with the publication number of 109868167A; the biogas power generation method comprises two steps of biogas purification and power generation, and the specific method of biogas purification comprises the following steps: (1) mixing potassium carbonate, sodium metaborate tetrahydrate and water to prepare a first mixed solution, impregnating activated volcanic rock powder by using the first mixed solution, and filtering to obtain a first treating agent for later use; (2) mixing N-methyldiethanolamine, sodium metavanadate dihydrate and water to prepare a second mixed solution, impregnating activated volcanic rock powder with the second mixed solution, and filtering to obtain a second treating agent for later use; (3) mixing gamma-aminopropyltriethoxysilane, ethanol, hydroxyl modified activated carbon and nano-scale carboxyl polystyrene microspheres, performing silanization reaction, adding 2-bromobutyric acid after the reaction is finished, continuing the reaction, drying for the first time, washing with toluene to remove the nano-scale carboxyl polystyrene microspheres, and drying for the second time to obtain a third treating agent for later use; (4) the method comprises the following steps that biogas firstly passes through a pretreatment pipeline filled with silica gel, then passes through a first pipeline, a second pipeline and a third pipeline which are respectively filled with a first treating agent, a second treating agent and a third treating agent in sequence, and finally passes through a tail pipeline filled with silica gel to be led out to be purified; the flow velocity of the water passing through the pretreatment pipeline and the flow velocity of the water passing through the tail pipeline are respectively 12-15 m/s and 6-8 m/s, and the flow velocity of the water passing through the first pipeline, the second pipeline and the third pipeline is 0.5-1 m/s. In the method for generating electricity by using the biogas in the prior art, on one hand, the concentration of the biogas in the mixed gas is high, the utilization rate of the biogas is not high, and the production efficiency is low; on the other hand, the control of the gas quantity of the biogas is not accurate enough, and the optimal air-fuel ratio cannot be realized, thereby further reducing the production efficiency.
Disclosure of Invention
The invention aims to provide a method and a system for generating power by utilizing methane.
The method for generating power by utilizing methane provided by the invention comprises the following steps: s1, collecting biogas; s2, mixing the marsh gas and the air to form mixed gas; s3, igniting the mixed gas by using a spark plug to expand or contract the mixed gas, and pushing the piston to reciprocate; s4, connecting the piston with the generator to drive the generator to work and output electric energy; s5, connecting the output end of the generator with the input end of the distribution equipment, so as to configure the electric energy output by the generator by the distribution equipment and then transmit the electric energy to the electric equipment; s6, connecting the output end of the power distribution equipment with the electric equipment circuit so as to realize the step of providing the adaptive power supply for the electric equipment; the step S2 of mixing the marsh gas and the air to form mixed gas further includes: and S21 is used for controlling the air-fuel ratio parameter of the mixed gas according to the information input from the outside.
The S21 is a step for controlling an air-fuel ratio parameter of the mixed gas based on externally input information, and includes: s211, detecting the electric equipment to obtain a required electric parameter; s212, calculating a required air-fuel ratio parameter according to the required electricity utilization parameter analysis; s213, detecting the current methane concentration, the engine rotating speed, the engine power, the engine torque and the oxygen content of the engine tail gas of the system so as to obtain a current methane concentration parameter, a current engine rotating speed parameter, a current engine torque parameter and a current oxygen content parameter of the engine tail gas; s214, analyzing and calculating a current air-fuel ratio parameter according to the current methane concentration parameter, the current engine rotating speed parameter, the current engine torque parameter and the current engine tail gas oxygen content parameter; s215 is used for comparing the required air-fuel ratio parameter with the current air-fuel ratio parameter and producing an air-fuel ratio control signal according to the difference between the required air-fuel ratio parameter and the current air-fuel ratio parameter; s216, generating a methane concentration adjusting signal, an air flow adjusting signal and a methane flow adjusting signal according to the air-fuel ratio control signal; s217 is used for adjusting the concentration of the biogas input by the system according to the biogas concentration adjusting signal, adjusting the air flow input by the system according to the air flow adjusting signal, and adjusting the biogas flow input by the system according to the biogas flow adjusting signal, so that the current air-fuel ratio of the mixed gas is adjusted to be matched with the current electric equipment. And S3, igniting the mixed gas by using a spark plug, so that the mixed gas expands or contracts, and the piston is pushed to reciprocate, wherein the ignition voltage of the spark plug is 5 ten thousand volts.
The system for generating power by utilizing the marsh gas comprises marsh gas collecting equipment, gas mixing equipment, an engine, a generator and power distribution equipment, wherein the marsh gas collecting equipment is connected with the engine; the method is characterized in that: the gas mixing equipment comprises a biogas input pipe, an air input pipe, a gas mixing pipeline and an air-fuel ratio control device; the air-fuel ratio control device comprises a first electromagnetic valve (31) arranged in the methane input pipe, a second electromagnetic valve (32) arranged in the air input pipe, a first microprocessor controller (1), an external signal input device (21) and a current air-fuel ratio detection device (22); the external signal input device (21) and the current air-fuel ratio detection device (22) are both connected with a signal input port of the first micro-processing controller (1); and the control ends of the first electromagnetic valve (31) and the second electromagnetic valve (32) are connected with a control signal output port of the first microprocessor controller (1).
The current air-fuel ratio detection device (22) comprises a methane concentration sensor (222) arranged in a methane input pipe, a rotating speed sensor (223) arranged in an engine, a power sensor (224) arranged on the engine, a torque sensor (225) arranged on the engine, an exhaust gas oxygen content sensor (226) arranged in an exhaust gas output pipeline of the engine and a second micro-processing controller (221); the output end of the biogas concentration sensor (222), the output end of the rotating speed sensor (223), the output end of the power sensor (224), the output end of the torque sensor (225) and the output end of the tail gas oxygen content sensor (226) are connected with the second micro-processing controller (221). The gas mixing pipeline comprises a first pipeline cavity and a second pipeline cavity; an air input port is formed in the end part of the first pipeline cavity, and the air input pipe is connected with the gas mixing pipeline through the air input port and communicated with the gas mixing pipeline; a biogas input port is arranged on the side wall of the second pipeline cavity, and the biogas input pipe is connected with the gas mixing pipeline through the biogas input port and communicated with the gas mixing pipeline; and the first pipeline cavity is internally provided with a rotating blade which is coaxially arranged with the first pipeline cavity.
According to the method and the system for generating power by utilizing methane, provided by the invention, the parameter of the required combustible ratio is obtained by detecting the external equipment, and the parameter of the current combustible ratio is obtained by detecting the system by the sensor, so that the mixing of the methane and the air is controlled according to the comparison result of the parameter of the required combustible ratio and the parameter of the current combustible ratio, thereby realizing thin combustion, ensuring sufficient energy input, avoiding the phenomena of tempering, blasting and the like, and improving the economic efficiency and the safety performance of the power generation system.
Drawings
FIG. 1 is a schematic flow chart of a method for generating power by using biogas according to a first embodiment of the present invention;
fig. 2 is a schematic diagram illustrating a step for controlling an air-fuel ratio parameter of the mixed fuel gas according to externally input information in the method for generating power by using biogas according to the first embodiment of the present invention;
fig. 3 is a schematic circuit diagram of an air-fuel ratio control device in a system for generating power by using biogas according to a second embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
As shown in fig. 1, the present embodiment provides a method for generating power by using biogas, including the following steps:
s1, collecting biogas;
s2, mixing the marsh gas and the air to form mixed gas;
s3, igniting the mixed gas by using a spark plug to expand or contract the mixed gas, and pushing the piston to reciprocate;
s4, connecting the piston with the generator to drive the generator to work and output electric energy;
s5, connecting the output end of the generator with the input end of the distribution equipment, so as to configure the electric energy output by the generator by the distribution equipment and then transmit the electric energy to the electric equipment;
s6 is for electrically connecting the output of the power distribution device to the powered device to implement the step of providing the adapted power to the powered device.
It can be understood by those skilled in the art that the steps from S1 to S6 are the basic method for generating electricity by using biogas to convert chemical energy into electric energy, which has been implemented in the prior art, and the implementation principle and detailed steps thereof are not described herein again. However, in the method for generating power by using biogas provided by the present embodiment, the step S2 of mixing the biogas and air to form a mixed gas further includes: and S21 is used for controlling the air-fuel ratio parameter of the mixed gas according to the information input from the outside. As can be understood by those skilled in the art, the air-fuel ratio refers to the ratio of the air quality parameter to the methane quality parameter in the mixed gas, and the air-fuel ratio parameter is too high, which results in insufficient combustion energy; the air-fuel ratio parameter is too low, so that the mixed gas is insufficiently combusted, and the common phenomena of backfire and blasting in the prior art are caused. Those skilled in the art can understand that the method for generating power by using biogas provided by the embodiment accurately controls the air-fuel ratio of the mixed gas on the basis of the prior art, ensures sufficient energy input on the basis of realizing lean combustion, avoids the phenomena of backfire, blasting and the like, and improves the economic efficiency and safety performance of the power generation system.
As shown in fig. 2, the S21 is a step for controlling an air-fuel ratio parameter of the mixed gas based on externally input information, and includes:
s211, detecting the electric equipment to obtain a required electric parameter;
s212, calculating a required air-fuel ratio parameter according to the required electricity utilization parameter analysis;
s213, detecting the current methane concentration, the engine rotating speed, the engine power, the engine torque and the oxygen content of the engine tail gas of the system so as to obtain a current methane concentration parameter, a current engine rotating speed parameter, a current engine torque parameter and a current oxygen content parameter of the engine tail gas;
s214, analyzing and calculating a current air-fuel ratio parameter according to the current methane concentration parameter, the current engine rotating speed parameter, the current engine torque parameter and the current engine tail gas oxygen content parameter;
s215 is used for comparing the required air-fuel ratio parameter with the current air-fuel ratio parameter and producing an air-fuel ratio control signal according to the difference between the required air-fuel ratio parameter and the current air-fuel ratio parameter;
s216, generating a methane concentration adjusting signal, an air flow adjusting signal and a methane flow adjusting signal according to the air-fuel ratio control signal;
s217 is used for adjusting the concentration of the biogas input by the system according to the biogas concentration adjusting signal, adjusting the air flow input by the system according to the air flow adjusting signal, and adjusting the biogas flow input by the system according to the biogas flow adjusting signal, so that the current air-fuel ratio of the mixed gas is adjusted to be matched with the current electric equipment.
Those skilled in the art can understand that through the steps from S211 to S217, the air-fuel ratio parameter of the mixed gas can be precisely controlled according to the requirement of the electric equipment, and lean combustion is achieved.
And S3, igniting the mixed gas by using a spark plug, so that the mixed gas expands or contracts, and the piston is pushed to reciprocate, wherein the ignition voltage of the spark plug is 5 ten thousand volts. As can be understood by those skilled in the art, the ultrahigh pressure of 5 ten thousand volts is utilized to realize high-energy ignition, and the mixed fuel gas can be smoothly ignited under the condition of high fuel-air ratio.
Example two
The embodiment provides a system for generating power by utilizing biogas, which comprises biogas collecting equipment, gas mixing equipment, an engine, a generator and power distribution equipment, wherein the biogas collecting equipment is connected with the gas mixing equipment; the biogas collecting equipment, the engine, the generator and the power distribution equipment are all the equipment which is used conventionally in the prior art, and the preparation of the biogas collecting equipment, the engine, the generator and the power distribution equipment can be realized by a person skilled in the art according to the disclosed content of the prior art, so the detailed technical content is not repeated; the gas mixing equipment comprises a biogas input pipe, an air input pipe, a gas mixing pipeline and an air-fuel ratio control device; the air-fuel ratio control device comprises a first electromagnetic valve 31 arranged in the methane input pipe, a second electromagnetic valve 32 arranged in the air input pipe, a first microprocessor controller 1, an external signal input device 21 and a current air-fuel ratio detection device 22; the external signal input device 21 and the current air-fuel ratio detection device 22 are both connected with a signal input port of the first microprocessor controller 1; the control ends of the first electromagnetic valve 31 and the second electromagnetic valve 32 are both connected with the control signal output port of the first microprocessor controller 1. As can be understood by those skilled in the art, the external signal input device 21 is used for detecting electric equipment so as to obtain a required air-fuel ratio parameter; the current air-fuel ratio detection device 22 is used for acquiring current air-fuel ratio parameters; the first micro-processing controller 1 compares the required air-fuel ratio parameter with the current air-fuel ratio parameter, generates an air-fuel ratio control signal according to the difference between the required air-fuel ratio parameter and the current air-fuel ratio parameter, and further generates a biogas flow adjusting signal for controlling the first electromagnetic valve 31 and an air flow adjusting signal for controlling the second electromagnetic valve 32 according to the air-fuel ratio control signal, so that the biogas flow in the biogas input pipe is adjusted through the first electromagnetic valve 31, the air flow in the air input pipe is adjusted through the second electromagnetic valve 32, and further the air-fuel ratio of mixed gas in the gas mixing pipeline is adjusted.
As shown in fig. 3, the current air-fuel ratio detection device 22 includes a biogas concentration sensor 222 disposed in the biogas input pipe, a rotational speed sensor 223 disposed in the engine, a power sensor 224 disposed on the engine, a torque sensor 225 disposed on the engine, an exhaust gas oxygen content sensor 226 disposed in an exhaust gas output pipe of the engine, and a second micro-processing controller 221; the output end of the biogas concentration sensor 222, the output end of the rotation speed sensor 223, the output end of the power sensor 224, the output end of the torque sensor 225 and the output end of the tail gas oxygen content sensor 226 are all connected with the second micro-processing controller 221. As will be understood by those skilled in the art, the biogas concentration sensor 222 is used for converting the biogas concentration parameter into an electrical signal and sending the electrical signal to the second micro-processing controller 221; the rotating speed sensor 223 is used for converting the rotating speed parameter into an electric signal and sending the electric signal to the second micro-processing controller 221; the power sensor 224 is used for converting the power parameter into an electric signal and sending the electric signal to the second micro-processing controller 221; the torque sensor 225 is used for converting the torque parameter into an electric signal and sending the electric signal to the second microprocessor controller 221; the tail gas oxygen content sensor 226 is used for converting the tail gas oxygen content parameter into an electric signal and sending the electric signal to the second micro-processing controller 221; the second micro-processing controller 221 is configured to calculate a current air-fuel ratio parameter according to the received biogas concentration parameter electrical signal, rotation speed parameter electrical signal, power parameter electrical signal, torque parameter electrical signal, and tail gas oxygen content parameter electrical signal, convert the current air-fuel ratio parameter into an electrical signal, and send the electrical signal to the first micro-processing controller 1.
Further, the gas mixing duct comprises a first duct cavity and a second duct cavity; an air input port is formed in the end part of the first pipeline cavity, and the air input pipe is connected with the gas mixing pipeline through the air input port and communicated with the gas mixing pipeline; a biogas input port is arranged on the side wall of the second pipeline cavity, and the biogas input pipe is connected with the gas mixing pipeline through the biogas input port and communicated with the gas mixing pipeline; and the first pipeline cavity is internally provided with a rotating blade which is coaxially arranged with the first pipeline cavity. As will be appreciated by those skilled in the art, air from the air inlet duct enters the first duct chamber through the air inlet, and as a result of the rotating vanes in the first duct chamber, the air entering the second duct chamber through the first duct chamber forms a strong vortex; the biogas is scattered by the vortex formed by the air when entering the second pipeline cavity from the biogas input pipe through the biogas input port, so that more fully mixed gas is formed, and lean combustion is better realized.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (6)
1. A method for generating power by utilizing marsh gas comprises the following steps:
s1, collecting biogas;
s2, mixing the marsh gas and the air to form mixed gas;
s3, igniting the mixed gas by using a spark plug to expand or contract the mixed gas, and pushing the piston to reciprocate;
s4, connecting the piston with the generator to drive the generator to work and output electric energy;
s5, connecting the output end of the generator with the input end of the distribution equipment, so as to configure the electric energy output by the generator by the distribution equipment and then transmit the electric energy to the electric equipment;
s6, connecting the output end of the power distribution equipment with the electric equipment circuit so as to realize the step of providing the adaptive power supply for the electric equipment;
the method is characterized in that: the step S2 of mixing the marsh gas and the air to form mixed gas further includes: and S21 is used for controlling the air-fuel ratio parameter of the mixed gas according to the information input from the outside.
2. A method of generating electricity with biogas as claimed in claim 1, characterized in that: the S21 is a step for controlling an air-fuel ratio parameter of the mixed gas based on externally input information, and includes:
s211, detecting the electric equipment to obtain a required electric parameter;
s212, calculating a required air-fuel ratio parameter according to the required electricity utilization parameter analysis;
s213, detecting the current methane concentration, the engine rotating speed, the engine power, the engine torque and the oxygen content of the engine tail gas of the system so as to obtain a current methane concentration parameter, a current engine rotating speed parameter, a current engine torque parameter and a current oxygen content parameter of the engine tail gas;
s214, analyzing and calculating a current air-fuel ratio parameter according to the current methane concentration parameter, the current engine rotating speed parameter, the current engine torque parameter and the current engine tail gas oxygen content parameter;
s215 is used for comparing the required air-fuel ratio parameter with the current air-fuel ratio parameter and producing an air-fuel ratio control signal according to the difference between the required air-fuel ratio parameter and the current air-fuel ratio parameter;
s216, generating a methane concentration adjusting signal, an air flow adjusting signal and a methane flow adjusting signal according to the air-fuel ratio control signal;
s217 is used for adjusting the concentration of the biogas input by the system according to the biogas concentration adjusting signal, adjusting the air flow input by the system according to the air flow adjusting signal, and adjusting the biogas flow input by the system according to the biogas flow adjusting signal, so that the current air-fuel ratio of the mixed gas is adjusted to be matched with the current electric equipment.
3. A method for generating electricity using biogas as claimed in claim 2, characterized in that: and S3, igniting the mixed gas by using a spark plug, so that the mixed gas expands or contracts, and the piston is pushed to reciprocate, wherein the ignition voltage of the spark plug is 5 ten thousand volts.
4. A system for generating power by utilizing marsh gas comprises marsh gas collecting equipment, gas mixing equipment, an engine, a generator and power distribution equipment; the method is characterized in that: the gas mixing equipment comprises a biogas input pipe, an air input pipe, a gas mixing pipeline and an air-fuel ratio control device; the air-fuel ratio control device comprises a first electromagnetic valve (31) arranged in the methane input pipe, a second electromagnetic valve (32) arranged in the air input pipe, a first microprocessor controller (1), an external signal input device (21) and a current air-fuel ratio detection device (22); the external signal input device (21) and the current air-fuel ratio detection device (22) are both connected with a signal input port of the first micro-processing controller (1); and the control ends of the first electromagnetic valve (31) and the second electromagnetic valve (32) are connected with a control signal output port of the first microprocessor controller (1).
5. The system for generating electricity using biogas according to claim 4, wherein: the current air-fuel ratio detection device (22) comprises a methane concentration sensor (222) arranged in a methane input pipe, a rotating speed sensor (223) arranged in an engine, a power sensor (224) arranged on the engine, a torque sensor (225) arranged on the engine, an exhaust gas oxygen content sensor (226) arranged in an exhaust gas output pipeline of the engine and a second micro-processing controller (221); the output end of the biogas concentration sensor (222), the output end of the rotating speed sensor (223), the output end of the power sensor (224), the output end of the torque sensor (225) and the output end of the tail gas oxygen content sensor (226) are connected with the second micro-processing controller (221).
6. The system for generating electricity using biogas according to claim 5, wherein: the gas mixing pipeline comprises a first pipeline cavity and a second pipeline cavity; an air input port is formed in the end part of the first pipeline cavity, and the air input pipe is connected with the gas mixing pipeline through the air input port and communicated with the gas mixing pipeline; a biogas input port is arranged on the side wall of the second pipeline cavity, and the biogas input pipe is connected with the gas mixing pipeline through the biogas input port and communicated with the gas mixing pipeline; and the first pipeline cavity is internally provided with a rotating blade which is coaxially arranged with the first pipeline cavity.
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Citations (7)
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