CN112901337B - High-power low-concentration gas engine and gas supply method thereof - Google Patents

High-power low-concentration gas engine and gas supply method thereof Download PDF

Info

Publication number
CN112901337B
CN112901337B CN202110362771.5A CN202110362771A CN112901337B CN 112901337 B CN112901337 B CN 112901337B CN 202110362771 A CN202110362771 A CN 202110362771A CN 112901337 B CN112901337 B CN 112901337B
Authority
CN
China
Prior art keywords
combustion chamber
valve
gas
preheating zone
low
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202110362771.5A
Other languages
Chinese (zh)
Other versions
CN112901337A (en
Inventor
王晖龙
狄光灿
殷立波
王瑞祺
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sichuan Huayuan Aerodynamic Power Co ltd
Original Assignee
Guizhou Huaqi Power Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guizhou Huaqi Power Co ltd filed Critical Guizhou Huaqi Power Co ltd
Priority to CN202110362771.5A priority Critical patent/CN112901337B/en
Publication of CN112901337A publication Critical patent/CN112901337A/en
Application granted granted Critical
Publication of CN112901337B publication Critical patent/CN112901337B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • 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
    • F02B19/00—Engines characterised by precombustion chambers
    • F02B19/10—Engines characterised by precombustion chambers with fuel introduced partly into pre-combustion chamber, and partly into cylinder
    • F02B19/1019—Engines characterised by precombustion chambers with fuel introduced partly into pre-combustion chamber, and partly into cylinder with only one pre-combustion chamber
    • F02B19/108—Engines characterised by precombustion chambers with fuel introduced partly into pre-combustion chamber, and partly into cylinder with only one pre-combustion chamber with fuel injection at least into pre-combustion chamber, i.e. injector mounted directly in the pre-combustion chamber
    • 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
    • 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
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • 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
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02M21/023—Valves; Pressure or flow regulators in the fuel supply or return system
    • 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
    • F02M21/0218—Details on the gaseous fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
    • F02M21/0284—Arrangement of multiple injectors or fuel-air mixers per combustion chamber
    • 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
    • F02M21/06—Apparatus for de-liquefying, e.g. by heating
    • 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
    • F02B2043/103—Natural gas, e.g. methane or LNG used as a fuel
    • 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
    • Y02T10/12—Improving ICE efficiencies
    • 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

Abstract

The invention provides a high-power low-concentration gas engine and a gas supply method thereof, wherein the gas engine comprises a main combustion chamber, a pre-combustion chamber, a preheating zone, a first valve, a second valve, a third valve and a first supercharger; the preheating zone is used for preheating low-concentration gas and transmitting the preheated low-concentration gas to the main combustion chamber for combustion; the flue gas outlet of the main combustion chamber is connected in parallel with the preheating zone and the first valve through a pipeline and is used for providing high-temperature flue gas for the preheating zone, and the first valve is opened to discharge the flue gas of the preheating zone and the main combustion chamber; an air inlet channel is formed in the combustion chamber of the pre-combustion chamber, the air inlet channel is connected with a second valve through a pipeline, and the second valve is opened to transmit pure natural gas into the combustion chamber of the pre-combustion chamber; this scheme of adoption can introduce dry gas to fully preheat low concentration gas, with this gas of burning lower concentration, its minimum concentration limit of low concentration gas of burning can reach about 5.5%.

Description

High-power low-concentration gas engine and gas supply method thereof
Technical Field
The invention relates to the technical field of engine combustion, in particular to a high-power low-concentration gas engine and a gas supply method thereof.
Background
Gas is an important source of serious natural disasters of coal mines. The existence of gas can suffocate people and explode when meeting fire sources, and the gas explosion also easily causes coal dust explosion. More than 70% of serious coal mine disaster accidents in China are gas accidents. The gas is harmful gas and clean energy, and the gas can be drained and comprehensively utilized to turn the harm into the benefit, so that the waste is changed into the valuable. At present, foreign power generation sets have strict limits on gas utilization, and are generally only suitable for high-concentration gas with the concentration of more than 25%, and individual manufacturers are suitable for gas with the concentration of more than 15%; as a plurality of manufacturers make a great deal of research and development work in China in the early years, the method lays a foundation for the utilization of low-concentration gas in a gas engine in China, and the utilization concentration of the gas reaches the level of 8.5 percent. The main component of the gas is methane, and the greenhouse effect of the methane is generally considered to be 24.5 times that of carbon dioxide, so that the pollution of the atmosphere caused by the direct emission of the gas is greatly reduced by utilizing the low-concentration gas.
In the prior art, many engines capable of using low-concentration gas have been developed, but the minimum concentration limit of the developed engines such as a spark plug and a gas engine for the low-concentration gas is about 8.5%, and the low-concentration gas with the concentration limit of 8.5% or less is combusted to generate power or exhausted under the condition that the low-concentration gas cannot be used, so that the utilization efficiency is low, and the environmental pollution is caused.
The main problem of using the gas with lower concentration is difficult ignition, the gas mixture with concentration below 8.5% is difficult to ignite by using a common spark plug, and the gas with lower concentration also contains a large amount of water in the conveying process, so that the ignition is more difficult.
Disclosure of Invention
The invention aims to solve the problems and provides a pre-combustion chamber utilizing low-concentration gas. Because dry natural gas with high heat value is introduced into the precombustion chamber, the concentration requirement of combustible gas on fire in the precombustion chamber is ensured, and the influence of moisture in the precombustion chamber is effectively prevented. Dry and clean natural gas is introduced into the combustion chamber of the pre-combustion chamber, so that the ignition environment of the ignition spark plug is greatly improved, and the ignition reliability is greatly improved; the mixed gas with the theoretical air-fuel ratio can be formed in the precombustion chamber and is easy to ignite, the flame sprayed out from the nozzle of the precombustion chamber is equivalent to the improvement of ignition energy, lean combustion in a cylinder can be realized, the combustion heat efficiency is greatly improved, the fuel economy is better, the combustion temperature is lower, and the emission of nitrogen oxides is lower; by the device, lean combustion can be realized, and the utilization concentration of 8.5 percent of gas is further reduced to 5.5 percent.
The technical scheme adopted by the invention is as follows: a high-power low-concentration gas engine comprises a main combustion chamber, a pre-combustion chamber, a preheating zone, a first valve, a second valve, a third valve and a first supercharger;
the preheating zone is communicated with the main combustion chamber and is used for preheating low-concentration gas and transmitting the preheated low-concentration gas to the main combustion chamber for combustion;
the flue gas outlet of the main combustion chamber is connected in parallel with the preheating zone and the first valve through a pipeline, and is used for providing high-temperature flue gas for the preheating zone, and the first valve is opened and is used for discharging the flue gas of the preheating zone and the main combustion chamber;
an air inlet channel is formed in the combustion chamber of the pre-combustion chamber, the air inlet channel is connected with a second valve through a pipeline, and the second valve is opened to transmit pure natural gas into the combustion chamber of the pre-combustion chamber;
the air inlet of the main combustion chamber is connected with a first supercharger through a pipeline, the first supercharger is connected with a third valve through a pipeline, the third valve is opened, the third valve is used for filling air into the main combustion chamber, and the first supercharger is started and used for increasing the air quantity entering the main combustion chamber.
When the scheme is operated, in order to enable gas with lower concentration to be combusted in the main combustion chamber, the cylinder sleeve and the spark plug jacket are respectively provided with an air inlet channel, a precombustion chamber air inlet is arranged outside the air inlet channel, high-concentration liquefied natural gas is gasified and adjusted to certain pressure, then is introduced into the precombustion chamber air inlet and enters the air inlet channel, finally enters the precombustion chamber combustion chamber along the air inlet channel to be mixed with low-concentration gas in the precombustion chamber combustion chamber, the introduced gasified natural gas is dry pure gas, after the low-concentration gas is mixed, the integral water content is reduced, the concentration is increased, the prior art is that a spark plug directly ignites the gas in the main combustion chamber, the mixed gas in the precombustion chamber combustion chamber can be ignited by the spark plug, after the mixed gas is ignited, a nozzle of the precombustion chamber can spray flame in the precombustion chamber combustion chamber into the main combustion chamber, thereby igniting the low-concentration gas in the main combustion chamber; the scheme is that the mixed gas is ignited firstly, and then the low-concentration gas is combusted, so that the gas with lower concentration can be ignited; the one-way control valve is arranged in the air inlet channel, when the one-way control valve is in a certain period of an air inlet stroke, air supplied by the pre-combustion chamber with certain pressure overcomes the combined action of the spring and the pressure in the air cylinder, the one-way control valve is opened, and high-concentration natural gas can effectively enter the combustion chamber of the pre-combustion chamber; when the cylinder is in a power stroke, the pressure in the cylinder is extremely high, and the one-way control valve can prevent the burnt working medium in the cylinder from returning to the pre-combustion chamber gas supply pipe at the moment, so that the working safety of the system is ensured;
when the scheme is operated, the preheating zone is also arranged, has a certain temperature and can preheat low-concentration gas in advance, so that the low-concentration gas can further improve the combustion possibility of the low-concentration gas; the preheating zone and the first valve are connected in parallel through a pipeline, the high-temperature smoke in the main combustion chamber can only enter the preheating zone to provide preheating temperature when the first valve is closed, and the smoke in the preheating zone and the main combustion chamber can be discharged from the first valve when the first valve is opened; the gas inlet of the main combustion chamber is connected with a second valve through a pipeline, and the second valve is opened to transmit high-concentration pure natural gas into the combustion chamber of the precombustion chamber; the air inlet of the main combustion chamber is connected with a first supercharger through a pipeline, the first supercharger is connected with a third valve through a pipeline, the third valve is opened and used for filling air into the main combustion chamber, the first supercharger is started, the air quantity entering the main combustion chamber can be increased, so that the oxygen inlet amount is improved, the air-fuel ratio is changed, and low-concentration gas can be fully combusted; wherein the main combustion chamber is communicated with the combustion chamber of the precombustion chamber, and the low-concentration gas and the air are communicated.
Further optimization, the device also comprises a drying zone, wherein the drying zone is connected with the preheating zone and is used for drying the low-concentration gas and transmitting the dried low-concentration gas to the preheating zone.
Further optimize, still include explosion-proof fan, explosion-proof fan connects the drying zone for transmit low concentration gas to the drying zone.
Further optimizing, still include the second booster, the second booster is connected the drying zone, is used for increasing the income volume of low concentration gas.
Further optimization, the gas pumping device further comprises a gas pumping area, and the gas pumping area is used for pumping low-concentration gas preheated by the preheating area into the main combustion chamber.
Further optimizing, still include the smoking device, the smoking device passes through pipeline and first valve exit linkage, the smoking device is used for taking out the flue gas of preheating zone and main combustion chamber or blows in the flue gas to the preheating zone, the smoking device can be used to save flue gas and heat.
The preheating zone is arranged in the shell; be equipped with carousel and first pivot in the preheating zone, the carousel rotates through first pivot and the inboard rotation of casing to be connected: the turntable can rotate around the axis of the turntable;
the rotary table is internally provided with a plurality of fan blades, the first rotary shaft and the fan blades are hollow, the fan blades are communicated with the inside of the first rotary shaft, one end of the flue gas pipeline is connected with the main combustion chamber and used for receiving flue gas, the other end of the flue gas pipeline is rotatably connected with the first rotary shaft and communicated with the inside of the first rotary shaft, and the fan blades are provided with a plurality of first through holes;
the region between two adjacent flabellums is the heat transfer district, carousel end is opened has air inlet and gas outlet, the air inlet is used for transmitting gas to the heat transfer district.
Further optimizing, the air supply method of the high-power low-concentration gas engine comprises the following steps:
s1: opening a first valve, and inputting the smoke with heat stored in the smoking device into a preheating zone;
s2: when the temperature of the preheating zone reaches a set threshold value, opening a fourth valve and a second booster, and inputting low-concentration gas into the preheating zone;
s3: opening the second valve and the third valve, starting the engine and the first supercharger, rotating the turntable, inputting air and low-concentration gas into the main combustion chamber, and inputting pure natural gas into the combustion chamber of the precombustion chamber;
s4: and repeatedly opening and closing the first valve to keep the temperature in the preheating chamber at the set threshold value.
Further optimize, still include remote monitoring device, remote monitoring device is used for monitoring this device's real-time running state, controls the switching of first valve, second valve, third valve, fourth valve, explosion-proof fan, first booster and second booster.
Further optimize, still include temperature-detecting device, temperature-detecting device is used for detecting the inside temperature in preheating zone to transmit temperature data for remote monitoring device, remote monitoring device opens or closes first valve and smoking device according to the temperature data of transmission.
The working principle of the scheme is as follows: the method comprises the steps that a first valve is opened under the control of a remote monitoring device, smoke with heat stored in a smoking device is input into a preheating zone, the temperature of the preheating zone is detected in real time by a temperature detection device, real-time temperature data are fed back to the remote monitoring device, when the temperature in the preheating zone reaches a set threshold value, a fourth valve is opened, an explosion-proof fan is started, low-concentration gas begins to be filled into a drying zone, the smoking device absorbs high-temperature smoke in the preheating zone and a main combustion chamber, when the temperature of the preheating zone detected in real time by the temperature detection device is reduced to a certain temperature, the first valve is closed, the preheating zone continues to be filled with high-temperature smoke for preheating, and the steps are repeated, so that the preheating zone is always kept in a certain temperature range; wherein the low-concentration gas can sequentially pass through the drying zone and the preheating zone and finally enter the main combustion chamber; then the second valve and the third valve are opened, the engine and the first supercharger are started, the rotary plate is rotated, air and low-concentration gas are input into the main combustion chamber, pure natural gas is input into the combustion chamber of the precombustion chamber, the low-concentration gas is mixed and ignited in advance, the air quantity entering the main combustion chamber is increased, and the gas with lower concentration can be combusted.
The invention has the following beneficial effects:
this scheme provides a high-power low concentration gas engine and air feed method, adopt this scheme, use single liquefied natural gas all the way, liquefied natural gas lets in the inlet channel of precombustion chamber after gasification and adjustment to certain pressure, spout into the precombustion chamber combustion chamber through the one-way control valve, mix with the low concentration gas of impressing in the precombustion chamber combustion chamber and form high concentration gas mixture, this gas mixture is again through spark plug ignition burning, the precombustion chamber flame is through precombustion chamber spout jet to main combustion chamber, light burning to the low concentration gas in the main combustion chamber. Because the dry natural gas with high heat value is introduced into the precombustion chamber, the concentration requirement of the combustible gas on fire in the precombustion chamber is ensured, and the influence of the moisture in the precombustion chamber is effectively prevented;
the low-concentration gas can be fully preheated, the low-concentration gas inlet amount is increased, the air-fuel ratio is improved, and therefore gas with lower concentration is combusted, the minimum concentration limit of the combusted low-concentration gas can reach about 5.5%, the utilization efficiency is improved, meanwhile, the combustion reliability of the engine is greatly improved, and the stable operation of the engine is ensured;
the output power of the engine is 1500KW at most, and the engine provided by the invention is used, and high-concentration pure natural gas is introduced to be ignited in advance by improving the air-fuel ratio, preheating and drying low-concentration gas, so that the output power of the engine is greatly increased and can reach about 2000KW-3000KW at most.
Drawings
FIG. 1 is a flow chart of a gas supply method for a high-power low-concentration gas engine according to the present invention;
FIG. 2 is a partial schematic view of a high power low concentration gas engine according to the present invention;
FIG. 3 is a schematic structural view of a high-power low-concentration gas engine according to the present invention;
FIG. 4 is a schematic structural diagram of a high-power low-concentration gas engine-rotating disk provided by the invention;
FIG. 5 is a schematic structural diagram of an extraction region of a high-power low-concentration gas engine provided by the invention;
FIG. 6 is a side cross-sectional view of a high power, low concentration gas engine-preheat section provided by the present invention;
FIG. 7 is a schematic structural view of a high-power low-concentration gas engine-drying zone according to the present invention;
FIG. 8 is a front view of a high power low concentration gas engine-disk according to the present invention.
The reference numbers in the figures are: 1-main combustion chamber, 2-housing, 201-straight flow channel, 3-preheating zone, 31-rotary table, 311-fan blades, 312-heat transfer zone, 313-air inlet, 314-air outlet, 315-first through hole, 32-first rotary shaft, 4-flue gas pipe, 5-precombustion chamber, 6-spark plug, 7-first connecting rod, 8-second connecting rod, 81-annular groove, 9-precombustion chamber air inlet, 10-air extraction zone, 101-cylinder, 102-sliding plate, 103-annular closing plate, 104-elastic member, 105-second through hole, 106-third through hole, 11-exhaust pipe, 12-first valve, 13-second rotary shaft, 14-air inlet pipe, 15-drying zone, 151-shell, 152-disc, 153-stirring rod, 154-solid desiccant, 155-first filter screen, 156-second filter screen, 16-air pipe, 17-explosion-proof fan, 18-smoking device, 19-air inlet channel, 20-one-way control valve, 21-pre-combustion chamber nozzle, 22-flame jet orifice, 23-cylinder cover, 24-spark plug sheath, 25-second valve, 26-third valve, 27-first supercharger, 28-temperature detection device, 29-fourth valve and 30-second supercharger.
Detailed Description
The present invention will be described in further detail with reference to examples.
The first embodiment is as follows: as shown in fig. 1, a high-power low-concentration gas engine comprises a main combustion chamber 1 and a pre-combustion chamber 5, and further comprises a preheating zone 3, a first valve 12, a second valve 25, a third valve 26 and a first supercharger 27;
the preheating zone 3 is communicated with the main combustion chamber 1, the preheating zone 3 is used for preheating low-concentration gas and transmitting the preheated low-concentration gas to the main combustion chamber 1 for combustion;
a flue gas outlet of the main combustion chamber 1 is connected in parallel with the preheating zone 3 and the first valve 12 through a pipeline, and is used for providing high-temperature flue gas to the preheating zone 3, and the first valve 12 is opened and is used for discharging the flue gas of the preheating zone 3 and the main combustion chamber 1;
an air inlet channel 19 is formed in the pre-combustion chamber 5, the air inlet channel 19 is connected with a second valve 25 through a pipeline, and the second valve 25 is opened to transmit pure natural gas into the pre-combustion chamber 5;
the air inlet of the main combustion chamber 1 is connected with a first supercharger 27 through a pipeline, the first supercharger 27 is connected with a third valve 26 through a pipeline, the third valve 26 is opened, and the first supercharger 27 is started for increasing the air quantity entering the main combustion chamber 1 by filling air into the main combustion chamber 1.
In the embodiment, in order to make the gas with lower concentration burn in the main combustion chamber 1, the cylinder liner and the spark plug sheath 24 are both provided with an air inlet channel 19, the outside of the air inlet channel 19 is provided with a prechamber air inlet 9, the liquefied natural gas with high concentration is gasified and adjusted to a certain pressure, then is introduced into the prechamber air inlet 9, and then enters the air inlet channel 19, finally enters the prechamber combustion chamber 5 along the air inlet channel 19 to be mixed with the gas with low concentration in the prechamber combustion chamber 5, and the introduced gasified natural gas is dry pure gas, after the gas with low concentration is mixed, the whole water content is reduced, and the concentration is increased, the prior art is that the spark plug directly ignites the gas in the combustion chamber 1 by main combustion, the scheme can ignite the mixed gas in the prechamber combustion chamber 5 by the spark plug, after ignition, the prechamber nozzle 21 can spray the flame in the combustion chamber 5 into the main combustion chamber 1, thereby igniting the low-concentration gas in the main combustion chamber 1; the scheme is that the mixed gas is ignited firstly, and then the low-concentration gas is combusted, so that the gas with lower concentration can be ignited; a one-way control valve 20 is further arranged in the air inlet channel 19, when the one-way control valve 20 is in a certain period of an air inlet stroke, the air supply of the precombustion chamber with certain pressure overcomes the combined action of a spring and the pressure in the air cylinder, the one-way control valve 20 is opened, and high-concentration natural gas can effectively enter the precombustion chamber 5; when the cylinder is in a power stroke, the pressure in the cylinder is extremely high, the one-way control valve 20 can prevent the burnt working medium in the cylinder from returning to the pre-combustion chamber gas supply pipe at the moment, and the working safety of the system is ensured;
in the embodiment, a preheating zone 3 is further arranged, and the preheating zone 3 has a certain temperature, so that low-concentration gas can be preheated in advance, and the combustion possibility of the low-concentration gas is further improved; the preheating zone 3, the first valve 12, the second valve 25, the third valve 26 and the first booster 27 are further arranged, a flue gas outlet of the main combustion chamber 1 is connected in parallel with the preheating zone 3 and the first valve 12 through a pipeline and is used for providing high-temperature flue gas for the preheating zone 3, when the first valve 12 is closed, the high-temperature flue gas in the main combustion chamber 1 can only enter the preheating zone 3 to provide preheating temperature, and when the first valve 12 is opened, the flue gas in the preheating zone 3 and the main combustion chamber 1 can be discharged from the first valve 12; the gas inlet of the main combustion chamber 1 is connected with a second valve 25 through a pipeline, and the second valve 25 is opened for transmitting high-concentration pure natural gas into the combustion chamber 5 of the precombustion chamber; the air inlet of the main combustion chamber 1 is connected with a first supercharger 27 through a pipeline, the first supercharger 27 is connected with a third valve 26 through a pipeline, the third valve 26 is opened for filling air into the main combustion chamber 1, the first supercharger 27 is started, the air quantity entering the main combustion chamber 1 can be increased, so that the oxygen inlet quantity is increased, the air-fuel ratio is changed, and low-concentration gas can be fully combusted; wherein the main combustion chamber 1 is communicated with the combustion chamber 5 of the precombustion chamber, and the low-concentration gas and the air are communicated.
In this embodiment, a drying zone 15 is further included, and the drying zone 15 is connected to the preheating zone 3 for drying the low-concentration gas and transmitting the dried low-concentration gas to the preheating zone 3.
In this embodiment, the gas drying device further comprises an explosion-proof fan 17, wherein the explosion-proof fan 17 is connected with the drying area 15 and is used for transmitting low-concentration gas to the drying area 15.
In the embodiment, the gas drying device further comprises a second pressure booster 30, and the second pressure booster 30 is connected with the drying area 15 and is used for increasing the entering amount of the low-concentration gas.
In this embodiment, an air pumping region 10 is further included, and the air pumping region 10 is used for pumping the low-concentration gas preheated in the preheating region 3 into the main combustion chamber 1.
In this embodiment, the device further comprises a smoking device 18, the smoking device 18 is connected with the outlet of the first valve 12 through a pipeline, the smoking device 18 is used for extracting smoke from the preheating zone 3 and the main combustion chamber 1 or blowing smoke into the preheating zone 3, and the smoking device 18 can be used for storing smoke and heat.
In the embodiment, the device comprises a shell 2 and a flue gas pipeline 4, wherein the preheating zone 3 is arranged in the shell 2; a rotary disc 31 and a first rotating shaft 32 are arranged in the preheating zone 3, the rotary disc 31 is rotatably connected with the inner side of the shell 2 through the first rotating shaft 32: the rotating disc 31 can rotate around the axis thereof;
a plurality of fan blades 311 are arranged in the rotary disc 31, the first rotary shaft 32 and the plurality of fan blades 311 are hollow, the plurality of fan blades 311 are communicated with the inside of the first rotary shaft 32, one end of the flue gas pipeline 4 is connected with the main combustion chamber 1 and used for receiving flue gas, the other end of the flue gas pipeline 4 is rotatably connected with the first rotary shaft 32 and communicated with the inside of the first rotary shaft 32, and a plurality of first through holes 315 are formed in the fan blades 311;
the area between two adjacent fan blades 311 is a heat transfer area 312, the end of the turntable 31 is provided with an air inlet 313 and an air outlet 314, and the air inlet 313 is used for conveying air to the heat transfer area 312.
In this embodiment, a gas supply method for a high-power low-concentration gas engine includes the following steps:
s1: opening the first valve 12 and feeding the smoke with heat stored by the smoking device 18 into the preheating zone 3;
s2: when the temperature of the preheating zone 3 reaches a set threshold value, opening a fourth valve 29 and a second booster 30, and inputting low-concentration gas into the preheating zone 3;
s3: opening the second valve 25 and the third valve 26, starting the engine and the first supercharger 27, rotating the rotary disc 31, inputting air and low-concentration gas into the main combustion chamber 1, and inputting pure natural gas into the pre-combustion chamber 5;
s4: the first valve 12 is repeatedly opened and closed to maintain the temperature in the preheating chamber at a set threshold.
In this embodiment, the system further comprises a remote monitoring device, wherein the remote monitoring device is used for monitoring the real-time operation state of the system and controlling the opening and closing of the first valve 12, the second valve 25, the third valve 26, the fourth valve 29, the explosion-proof fan 17, the first supercharger 27 and the second supercharger 30.
In this embodiment, the device further comprises a temperature detection device 28, wherein the temperature detection device 28 is used for detecting the temperature inside the preheating zone 3 and transmitting the temperature data to a remote monitoring device, and the remote monitoring device opens or closes the first valve 12 and the smoking device 18 according to the transmitted temperature data.
The working principle of the scheme is as follows: the remote monitoring device controls to open the first valve 12, smoke with heat stored in the smoking device 18 is input into the preheating zone 3, the temperature of the preheating zone 3 is detected in real time by the temperature detection device 28, real-time temperature data is fed back to the remote monitoring device, when the temperature in the preheating zone 3 reaches a set threshold value, the fourth valve 29 is opened, the explosion-proof fan 17 is started, low-concentration gas is filled into the drying zone 15, the smoking device 18 absorbs high-temperature smoke in the preheating zone 3 and the main combustion chamber 1, when the temperature of the preheating zone 3 detected in real time by the temperature detection device 28 is reduced to a certain temperature, the first valve 12 is closed, the high-temperature smoke continues to be filled into the preheating zone 3 for preheating, and the steps are repeated, so that the preheating zone 3 is always kept in a certain temperature range; wherein, the low-concentration gas can sequentially pass through the drying zone 15 and the preheating zone 3 and finally enter the main combustion chamber 1; then, the second valve 25 and the third valve 26 are opened, the engine and the first supercharger 27 are started, the rotary table 31 is rotated, air and low-concentration gas are fed into the main combustion chamber 1, pure natural gas is fed into the pre-combustion chamber 5, the low-concentration gas is mixed and ignited in advance, the amount of air fed into the main combustion chamber 1 is increased, and gas with lower concentration can be combusted.
Example two: as shown in fig. 2 to 8, a prechamber using low-concentration gas comprises a prechamber combustion chamber 5 and a spark plug, and further comprises an intake passage 19 and a check valve 20;
said intake passage 19 communicates with prechamber combustion chamber 5 via a one-way control valve 20, said spark plug being adapted to ignite the gases inside prechamber combustion chamber 5.
In this embodiment, in order to ignite the low-concentration gas in the main combustion chamber 1, the cylinder liner and the spark plug sheath 24 are both provided with an air inlet channel 19, the exterior of the air inlet channel 19 is provided with a prechamber air inlet 9, the high-concentration liquefied natural gas is gasified and adjusted to a certain pressure, then introduced into the prechamber air inlet 9, and then enters the air inlet channel 19, and finally enters the prechamber combustion chamber 5 along the air inlet channel 19 to be mixed with the low-concentration gas in the prechamber combustion chamber 5, and the introduced gasified natural gas is dry and pure gas, after the low-concentration gas is mixed, the whole water content is reduced, and the concentration is increased, in the prior art, the spark plug directly ignites the gas in the main combustion chamber 1, while the scheme can ignite the mixed gas in the prechamber combustion chamber 5 first through the spark plug, after ignition, the prechamber nozzle 21 can spray the flame in the prechamber combustion chamber 5 into the main combustion chamber 1, thereby igniting the low-concentration gas in the main combustion chamber 1; the scheme is that the mixed gas is ignited firstly, and then the low-concentration gas is combusted, so that the gas with lower concentration can be ignited;
a one-way control valve 20 is further arranged in the air inlet channel 19, when the one-way control valve 20 is in a certain period of an air inlet stroke, the air supply of the precombustion chamber with certain pressure overcomes the combined action of a spring and the pressure in the air cylinder, the one-way control valve 20 is opened, and high-concentration natural gas can effectively enter the precombustion chamber 5; when the cylinder is in a power stroke, the pressure in the cylinder is extremely high, the one-way control valve 20 can prevent the burnt working medium in the cylinder from returning to the pre-combustion chamber gas supply pipe at the moment, and the working safety of the system is ensured.
In this embodiment, the prechamber nozzle 21 is provided with a plurality of flame injection ports 22, the plurality of flame injection ports 22 are uniformly distributed along the radial direction of the prechamber nozzle 21, the plurality of flame injection ports 22 can also be distributed along the axial direction of the prechamber nozzle 21, and the flame injection ports 22 with a certain angle, diameter and number are arranged, so that the combustion flame can be uniformly sprayed out, and the ignition energy of the main combustion chamber 1 can be increased.
In this embodiment, a preheating zone 3 is provided inside a housing 2, and the interior of the housing 2 is communicated with a main combustion chamber 1, wherein a turntable 31 and a rotating shaft are provided in the preheating zone 3, the center of the turntable 31 is rotatably connected with the inner side of the housing 2 through the rotating shaft, the turntable 31 can rotate around its own axis under the control of an external motor, a plurality of fan blades 311 are provided inside the turntable 31, the plurality of fan blades 311 are hollow inside, the rotating shaft is also hollow inside, a plurality of holes are provided on a portion of one end of the rotating shaft inserted into the turntable 31, so that the interiors of the plurality of fan blades 311 are all communicated with the interior of the rotating shaft; the gas-liquid separation device is further provided with a flue gas pipeline 4, one end of the flue gas pipeline 4 is connected with the main combustion chamber 1, the other end of the flue gas pipeline is connected with the first rotating shaft 32 through a rolling bearing and is communicated with the inside of the first rotating shaft 32, the rolling bearing is preferably arranged on the side surface of the shell 2, a sealing ring is further arranged at the connecting position of the rolling bearing and the side surface of the shell 2 and is used for preventing gas leakage, the flue gas pipeline 4 cannot be driven when the first rotating shaft 32 rotates, high-temperature flue gas generated by combustion in the main combustion chamber 1 can enter the first rotating shaft 32 through the flue gas pipeline 4 and is finally introduced into each fan blade 311, the area between every two adjacent fan blades 311 is a heat transfer area 312, and the fan blades 311 transfer heat to enable the heat transfer area 312 in the rotating disc 31 to generate high temperature; each fan blade 311 is provided with a plurality of first through holes 315, the end of the rotating disc 31 is provided with an air inlet 313 and an air outlet 314, wherein low-concentration gas enters the rotating disc 31 from the air inlet 313 and is positioned in the heat transfer area 312, in the process of continuously filling the low-concentration gas into the rotating disc 31, the low-concentration gas passes through the first through holes 315 on the fan blades 311 and passes through the heat transfer areas 312, and is finally discharged from the air outlet 314, and the discharged low-concentration gas enters the main combustion chamber 1 for combustion; the heat of the heat transfer areas 312 can increase the temperature of the low-concentration gas through heat transfer again to preheat the low-concentration gas, and the low-concentration gas in the rotary plate 31 can be fully stirred in the continuous rotation process of the rotary plate 31, so that the low-concentration gas can quickly increase the temperature of the low-concentration gas and is uniformly heated; when this scheme is specifically operated, when preheating low concentration gas, can adopt the flue gas of reserving earlier to preheat.
In this embodiment, the air inlet 313 and the air outlet 314 are respectively disposed at two ends of the rotating disc 31 and are disposed along the same radial direction of the rotating disc 31, so that the low-concentration gas inside the rotating disc 31 can pass through the fan blades 311 and the heat transfer area 312 as many as possible under the continuous rotation of the rotating disc 31, thereby increasing the heat transfer time.
In this embodiment, in order to improve the heat conductivity of the fan blade 311 and improve the heat transfer efficiency, the fan blade 311 is made of a super heat conductive material.
In this embodiment, a direct current channel 201 is further disposed in the housing 2, the direct current channel 201 is linearly disposed and is used for conveying the low-concentration gas discharged from the preheating zone 3 to the main combustion chamber 1, and a first connecting rod 7 and a second connecting rod 8 are further disposed, wherein the rotary table 31, the first connecting rod 7 and the second connecting rod 8 form a crank rocker mechanism, and the second connecting rod 8 can be driven to reciprocate along the length direction of the direct current channel 201 under the rotation of the rotary table 31; in order to make the low-concentration gas in the preheating zone 3 enter the main combustion chamber 1 quickly, an air extraction zone 10 is further arranged in the straight-flow channel 201, wherein the air extraction zone 10 comprises a cylinder body 101, a sliding plate 102, an annular closing plate 103 and an elastic piece 104, the outer side of the cylinder body 101 and the inner side of the shell 2 are fixedly connected, one end of the cylinder body 101 faces the preheating zone 3, one end of the cylinder body 101 is open, the sliding plate 102 and the inner side of the cylinder body 101 are connected in a sliding mode and can slide along the length direction of the cylinder body 101, the cylinder body 101 and the sliding plate 102 are both made of antistatic materials, a second through hole 105 is formed in the other end of the cylinder body 101, a second connecting rod 8 penetrates through the middle of the sliding plate 102 and the second through hole 105, the sliding plate 102 and the second connecting rod 8 are fixedly connected, and the sliding plate 102 is further provided with a plurality of third through holes 106; be equipped with annular groove 81 on second connecting rod 8, be equipped with annular shrouding 103 in annular groove 81, annular shrouding 103 bottom and annular groove 81 bottom sliding connection, annular shrouding 103 can slide along 8 length direction on the second connecting rod, and annular shrouding 103 is located cylinder body 101 other end direction, still is equipped with a plurality of elastic components 104 in annular groove 81, and elastic component 104 one end and annular shrouding 103 are connected, and the annular groove 81 lateral wall is connected to the other end.
When the second connecting rod 8 reciprocates, the low-concentration gas in the preheating zone 3 can be driven to enter the air extraction zone 10 to be transmitted; under the high-speed rotation of the rotary disc 31, the low-concentration gas can be rapidly transmitted into the main combustion chamber 1 for combustion.
The working principle is as follows: the rotating disc 31 rotates to drive the second connecting rod 8 to do linear reciprocating motion, when the second connecting rod 8 moves leftwards, the sliding plate 102 is driven to slide leftwards, and the annular sealing plate 103 is driven to move leftwards, because the diameter of the annular sealing plate 103 is larger than that of the second through hole 105, when the second connecting rod 8 moves leftwards to a certain distance, the annular sealing plate 103 abuts against the second through hole 105 and is sealed, due to the action of the elastic piece 104, the second connecting rod 8 can continuously move leftwards, because the sliding plate 102 is fixedly connected with the second connecting rod 8, the sliding plate 102 can continuously move along with the second connecting rod 8, at the moment, the space inside the cylinder body 101 is gradually enlarged, the internal pressure is increased, and because the right end is sealed by the annular sealing plate 103, low-concentration gas in the preheating area 3 can enter the cylinder body 101 through the third through hole 106; in the process that the second rod body moves rightwards, the annular sealing plate 103 is driven to move rightwards, so that the second through hole 105 is opened, in the process that the sliding plate 102 moves rightwards, low-concentration gas in the cylinder body 101 is extruded out of the second through hole 105, the low-concentration gas can rapidly enter the spiral blade, in the process that the rotary disc 31 rotates at a high speed, the pumping work is repeatedly carried out, and therefore the efficiency is improved.
In this embodiment, the structure of the preheating chamber is made of antistatic material, so as to avoid the generation of sparks due to heat generated by friction, such as the interaction between the crank and rocker mechanisms, the interaction when the first rotating shaft 32 drives the rotating disc 31 to rotate, the sliding plate 102 sliding, and the like.
In this embodiment, since the high-temperature flue gas generated in the main combustion chamber 1 has a higher temperature as the work of the engine is larger, when the temperature is too high, the flue gas recovery is not facilitated, and the waste heat is utilized, the temperature of the high-temperature flue gas needs to be reduced first; consequently be equipped with cooling device 42 in flue gas pipeline 4 middle part, wherein the winding has coil pipe 41 on cooling device 42, wherein coil pipe 41 adopts heat transfer material, coil pipe 41 both ends all communicate with flue gas pipeline 4, high temperature flue gas in the main combustion chamber 1 enters into coil pipe 41 through flue gas pipeline 4, finally go out from coil pipe 41 and enter into preheating zone 3, because cooling device 42 circular telegram back, the top layer has very low temperature, used the heat transfer, with this temperature that reduces high temperature flue gas, the last temperature of high temperature flue gas is fixed to accessible adjustment cooling device 42 top layer temperature or coil pipe 41 length.
In this embodiment, a branch pipe is arranged on the flue gas pipeline 4, the high-temperature flue gas conveyed by the flue gas pipeline 4 can be divided into two paths, one path enters the turntable 31, the other path enters the branch pipe, the branch pipe is also provided with a valve 12 and a smoking device 18, when the valve 12 is closed, the high-temperature flue gas conveyed by the flue gas pipeline 4 can only enter the turntable 31, and through preheating for a certain time, when the temperature in the turntable 31 reaches a preset temperature, the valve 12 is opened, and the smoking device 18 is opened, so that the smoking device 18 can suck out the flue gas in the turntable 31 and the high-temperature flue gas continuously conveyed by the flue gas pipeline 4, and when the temperature in the turntable 31 is reduced, the valve 12 is closed again; wherein the smoking device 18 is also capable of conveying the smoke in the opposite direction, conveying the reserved smoke at a certain temperature to the preheating zone 3 for initial preheating.
In this embodiment, a drying device 15, a second rotating shaft 13 and an air inlet pipe 14 are further provided, wherein the other end of the second rotating shaft 13 is connected with an air inlet 313 of the rotating disc 31, the second rotating shaft 13 is bent to prevent the second rotating shaft 13 from affecting the operation of the first connecting rod 7, the other end of the second rotating shaft 13 penetrates through the shell 2 and is connected with the other end of the air inlet pipe 14, the other end of the second rotating shaft 13 and the rotating disc 31 are arranged on the same axis, the air inlet pipe 14 is driven to rotate together when the second rotating shaft 13 rotates, wherein the second rotating shaft 13 is hollow and is communicated with the air inlet pipe 14, the drying device 15 is arranged at one end of the air inlet pipe 14, low-concentration gas firstly enters the drying device 15, the drying device 15 absorbs saturated moisture in the drying device to obtain dry low-concentration gas, and then the dry low-concentration gas sequentially passes through the air inlet pipe 14 and the second rotating shaft 13 and enters the rotating disc 31 for preheating, the dry low-concentration gas can improve the combustion degree.
In this embodiment, the drying device 15 includes a housing 151, a disc 152, a first filter 155 and a second filter 156, one end of the housing 151 is open, the disc 152 is disposed at the opening at one end of the housing 151, the circumferential side of the disc 152 is rotatably connected to the inner side of the housing 151, four through holes are disposed at the center of the disc 152, the air inlet pipe 14 is connected to the middle of the disc 152 and is communicated with the inside of the housing 151 through the fourth through hole, the disc 152 can rotate around its axis under the rotation of the air inlet pipe 14, and a plurality of stirring rods 153 are disposed on the inner side of the disc 152, so that the solid desiccant 154 in the housing 151 can be stirred when the disc 152 rotates, so that the solid desiccant 154 can fully absorb the saturated moisture in the low-concentration gas, thereby improving the absorption efficiency; the other end of the shell 151 is also provided with a fifth through hole, the gas pipe 16 is connected with the other end of the shell 151 and is communicated with the inside of the shell 151 through the fifth through hole, the gas pipe 16 is also provided with an explosion-proof fan 17, the explosion-proof fan 17 can blow gas in the gas pipe 16 into the shell 151, the gas absorbs saturated moisture under the action of the solid desiccant 154 and then enters the gas inlet pipe 14 through the fourth through hole, the fourth through hole is provided with a first filter screen 155, the fifth through hole is provided with a second filter screen 156, the solid desiccant 154 in the shell 151 can be prevented from leaking, and the solid desiccant 154 is preferably a molecular sieve.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (7)

1. A high-power low-concentration gas engine comprises a main combustion chamber (1) and a pre-combustion chamber (5), and is characterized by also comprising a preheating zone (3), a first valve (12), a second valve (25), a third valve (26) and a first supercharger (27);
the preheating zone (3) is communicated with the main combustion chamber (1), and the preheating zone (3) is used for preheating low-concentration gas and transmitting the preheated low-concentration gas to the main combustion chamber (1) for combustion;
a flue gas outlet of the main combustion chamber (1) is connected in parallel with the preheating zone (3) and the first valve (12) through a flue gas pipeline (4) and is used for providing high-temperature flue gas for the preheating zone (3), and the first valve (12) is opened and is used for discharging the flue gas of the preheating zone (3) and the main combustion chamber (1);
an air inlet channel (19) is formed in the combustion chamber (5) of the pre-combustion chamber, the air inlet channel (19) is connected with a second valve (25) through a pipeline, and the second valve (25) is opened to transmit pure natural gas into the combustion chamber (5) of the pre-combustion chamber;
the air inlet of the main combustion chamber (1) is connected with a first supercharger (27) through a pipeline, the first supercharger (27) is connected with a third valve (26) through a pipeline, the third valve (26) is opened and used for filling air into the main combustion chamber (1), and the first supercharger (27) is started and used for increasing the air amount entering the main combustion chamber (1);
the device also comprises a shell (2), wherein the preheating zone (3) is arranged in the shell (2);
a rotary disc (31) and a first rotating shaft (32) are arranged in the preheating zone (3), the rotary disc (31) is rotatably connected with the inner side of the shell (2) through the first rotating shaft (32): the rotary disc (31) can rotate around the axis thereof;
a plurality of fan blades (311) are arranged in the rotary disc (31), the first rotary shaft (32) and the plurality of fan blades (311) are hollow, the plurality of fan blades (311) are communicated with the inside of the first rotary shaft (32), one end of the flue gas pipeline (4) is connected with the main combustion chamber (1) and used for receiving flue gas, the other end of the flue gas pipeline (4) is rotatably connected with the first rotary shaft (32) and communicated with the inside of the first rotary shaft (32), and a plurality of first through holes (315) are formed in the fan blades (311);
the area between two adjacent fan blades (311) is a heat transfer area (312), the end part of the rotating disc (31) is provided with an air inlet (313) and an air outlet (314), and the air inlet (313) is used for transmitting low-concentration gas to the heat transfer area (312);
the device is characterized by further comprising a smoking device (18), wherein the smoking device (18) is connected with an outlet of the first valve (12) through a pipeline, the smoking device (18) is used for extracting smoke in the preheating zone (3) and the main combustion chamber (1) or blowing the smoke into the preheating zone (3), and the smoking device (18) can be used for storing the smoke and heat;
the gas drying device further comprises a second pressure booster (30), wherein the second pressure booster (30) is connected with the drying area (15) and is used for increasing the entering amount of low-concentration gas.
2. A high power low concentration gas engine according to claim 1, further comprising a drying zone (15), said drying zone (15) being connected to the preheating zone (3) for drying the low concentration gas and transferring the dried low concentration gas to the preheating zone (3).
3. A high power low concentration gas engine according to claim 2, characterized in that, it further comprises an explosion-proof blower (17), said explosion-proof blower (17) is connected with the drying zone (15) for transmitting low concentration gas to the drying zone (15).
4. A high power low concentration gas engine according to claim 1, characterized by further comprising an air extraction zone (10), said air extraction zone (10) being used for extracting the low concentration gas preheated in the preheating zone (3) into the main combustion chamber (1).
5. A gas supply method for a high-power low-concentration gas engine according to any one of claims 1 to 4, characterized by comprising the following steps:
s1: opening a first valve (12) and inputting the smoke with heat stored in the smoking device (18) into the preheating zone (3);
s2: when the temperature of the preheating zone (3) reaches a set threshold value, closing the first valve (12), opening a fourth valve (29) and a second booster (30) on an air inlet pipeline of the second booster (30), and inputting low-concentration gas into the preheating zone (3);
s3: opening a second valve (25) and a third valve (26), starting an engine and a first supercharger (27), rotating a rotary disc (31), inputting air and low-concentration gas into a main combustion chamber (1), and inputting pure natural gas into a combustion chamber (5) of a pre-combustion chamber;
s4: the first valve (12) is repeatedly opened and closed to maintain the temperature in the preheating zone (3) at a set threshold.
6. The gas supply method for the high-power low-concentration gas engine is characterized by further comprising a remote monitoring device, wherein the remote monitoring device is used for monitoring the real-time running state of the high-power low-concentration gas engine and controlling the opening and closing of the first valve (12), the second valve (25), the third valve (26), the fourth valve (29), the explosion-proof fan (17), the first supercharger (27) and the second supercharger (30).
7. The gas supply method for a high power low concentration gas engine according to claim 6, further comprising a temperature detecting means (28), wherein the temperature detecting means (28) is used for detecting the temperature inside the preheating zone (3) and transmitting the temperature data to a remote monitoring device, and the remote monitoring device opens or closes the first valve (12) and the smoking device (18) according to the transmitted temperature data.
CN202110362771.5A 2021-04-02 2021-04-02 High-power low-concentration gas engine and gas supply method thereof Active CN112901337B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110362771.5A CN112901337B (en) 2021-04-02 2021-04-02 High-power low-concentration gas engine and gas supply method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110362771.5A CN112901337B (en) 2021-04-02 2021-04-02 High-power low-concentration gas engine and gas supply method thereof

Publications (2)

Publication Number Publication Date
CN112901337A CN112901337A (en) 2021-06-04
CN112901337B true CN112901337B (en) 2022-03-22

Family

ID=76109923

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110362771.5A Active CN112901337B (en) 2021-04-02 2021-04-02 High-power low-concentration gas engine and gas supply method thereof

Country Status (1)

Country Link
CN (1) CN112901337B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113532102B (en) * 2021-06-29 2023-07-25 山东莱钢永锋钢铁有限公司 Automatic air-fuel ratio device of rotary kiln

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2403659A1 (en) * 2000-03-31 2001-10-11 Michael Willoughby Essex Coney A two stroke internal combustion engine
CN105756772A (en) * 2015-01-02 2016-07-13 卡特彼勒公司 Stable combustion in spark-ignited lean-burn engine
DE102018132469B3 (en) * 2018-12-17 2019-11-07 Green Gas Germany Gmbh Method for operating a gas engine with a lean gas containing less than 20% by volume methane and gas engine arrangement

Family Cites Families (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05321670A (en) * 1992-05-18 1993-12-07 Yanmar Diesel Engine Co Ltd Auxiliary chamber type lean combustion gas engine
JPH09256850A (en) * 1996-03-25 1997-09-30 Isuzu Ceramics Kenkyusho:Kk Gas engine of divideo combustion chamber type
JP3695085B2 (en) * 1997-09-08 2005-09-14 いすゞ自動車株式会社 Gas engine combustion chamber structure
US7040281B2 (en) * 2000-10-22 2006-05-09 Westport Research Inc. Method of injecting a gaseous fuel into an internal combustion engine
JP4739906B2 (en) * 2005-10-19 2011-08-03 財団法人シップ・アンド・オーシャン財団 Gas engine with improved fuel ignitability
US8944014B2 (en) * 2006-07-12 2015-02-03 Ksd Enterprises, Llc System and method for control of a gas
CN201180580Y (en) * 2008-03-20 2009-01-14 胜利油田胜利动力机械集团有限公司 Pre-combustion chamber
JP2010090860A (en) * 2008-10-10 2010-04-22 Mitsubishi Heavy Ind Ltd Gas engine using low calory gaseous fuel
CN101748230B (en) * 2010-01-26 2012-06-27 北京首钢国际工程技术有限公司 High-temperature low-oxygen external combustion stove
CN201963341U (en) * 2010-12-24 2011-09-07 上海攀极投资有限公司 Comprehensive application system of coalmine gas
CN102322332B (en) * 2011-06-20 2013-03-27 奇瑞汽车股份有限公司 Combustion chamber structure of CNG (Compressed Natural Gas) engine and fuel injection method thereof
EP2644992A1 (en) * 2012-03-26 2013-10-02 Siemens Aktiengesellschaft Burner arrangement, combustor, gas turbine engine and method for determining a rate of soot deposition in gas turbine combustors
EP2904230A1 (en) * 2012-10-02 2015-08-12 Caterpillar Energy Solutions GmbH Hydrogen flushed prechamber
CN104919154A (en) * 2013-01-16 2015-09-16 卡特彼勒能源方案有限公司 Hydrogen flushed combustion chamber
US9567939B2 (en) * 2013-01-28 2017-02-14 Sonex Research, Inc. Thermally stratified regenerative combustion chamber
US9567896B2 (en) * 2013-01-28 2017-02-14 Sonex Research, Inc. Method for modifying combustion chamber in a reciprocating piston internal combustion engine and resulting engine
WO2015195091A2 (en) * 2014-06-17 2015-12-23 Fuelina Technologies, Llc Hybrid fuel and method of making the same
CN105258385A (en) * 2014-07-16 2016-01-20 钟伟昌 Cooling and heating machine and applications thereof
US9828905B2 (en) * 2015-01-02 2017-11-28 Caterpillar Inc. Combustion pre-chamber and method for operating same
CN106468213B (en) * 2015-08-17 2021-04-16 聂百胜 Technology and method for generating electricity by explosion of coal dust, gas and air mixture
US9890690B2 (en) * 2015-10-06 2018-02-13 Woodward, Inc. Passive prechamber direct injection combustion
US11174163B2 (en) * 2017-04-28 2021-11-16 University Of Southern California Biogas upgrading technology for power generation
CN109209656B (en) * 2018-09-29 2020-11-03 哈尔滨工程大学 Combustion organization method for natural gas engine
CN109184982B (en) * 2018-09-29 2020-12-04 哈尔滨工程大学 Combustion organization method of natural gas engine with low-pressure gas supply and diesel micro-injection ignition in pre-combustion chamber
CN110318859A (en) * 2019-06-26 2019-10-11 哈尔滨工程大学 A kind of engine layering jet quick-burning method of multi-injection natural gas
CN111237092A (en) * 2020-03-10 2020-06-05 中科环能(天津)动力科技有限公司 Ultra-low concentration gas engine combustion system and control method thereof
CN111878155B (en) * 2020-07-31 2022-08-12 山西兰能煤层气开发有限公司 Coal mine low-concentration gas power generation device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2403659A1 (en) * 2000-03-31 2001-10-11 Michael Willoughby Essex Coney A two stroke internal combustion engine
CN105756772A (en) * 2015-01-02 2016-07-13 卡特彼勒公司 Stable combustion in spark-ignited lean-burn engine
DE102018132469B3 (en) * 2018-12-17 2019-11-07 Green Gas Germany Gmbh Method for operating a gas engine with a lean gas containing less than 20% by volume methane and gas engine arrangement

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
蓄热式低浓度瓦斯发电系统设计与试验研究;马云龙等;《煤炭科学技术》;20140826;第79-82页 *

Also Published As

Publication number Publication date
CN112901337A (en) 2021-06-04

Similar Documents

Publication Publication Date Title
CN106285945B (en) Continuous rotation pinking generator
CN112901337B (en) High-power low-concentration gas engine and gas supply method thereof
CN106170616A (en) Electromotor, biomass powder energy conversion and/or generate system, hybrid engine, and production and preparation method thereof
US3805747A (en) Combustion chamber device for a rotary piston internal combustion engine
US20080000215A1 (en) Engine systems and methods
CN108954302B (en) Combustion device
CN206205999U (en) Continuous rotation pinking generator
CN113047940B (en) Pre-combustion chamber using low-concentration gas
CN107120648B (en) A kind of high-temperature biomass gas dedicated burner
CN109611869B (en) Incinerator gas circuit structure
WO2020147583A1 (en) Intercooled heat-insulated internal combustion engine
US5511525A (en) Sliding-blade heat engine with vortex combustion chamber
US3976035A (en) Rotary engine and method of operation
CN101672469A (en) Method and device for igniting coal gas in heat storage chamber and flue during kiln reversing
CN110206524A (en) The combustion-supporting material injected system of coal underground gasifying furnace and method
CN217464408U (en) Ignition control system of circulating fluidized bed boiler
US4112877A (en) Internal combustion engine
CN211502792U (en) Rural garbage innocent treatment device
CN214424582U (en) Independent air inlet pre-combustion chamber of large-cylinder-diameter low-calorific-value gas internal combustion engine
CN115673617B (en) Welding device for maintaining underground coal mining equipment
CN103557070A (en) Heat-absorption type dry ice engine
CN102767428B (en) Heat absorption type dry ice engine
CN220685019U (en) Self-heating pyrolysis carbonization device
JPH0598989A (en) Engine utilizing gas formed from industrial waste matters
EP0605576B1 (en) Two stroke internal combustion engine

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
TR01 Transfer of patent right
TR01 Transfer of patent right

Effective date of registration: 20230908

Address after: 620000 No. 7, Section 2, Tengfei Avenue, Shigao Economic Development Zone, Renshou County, Meishan, Sichuan Province

Patentee after: Sichuan Huayuan Aerodynamic Power Co.,Ltd.

Address before: 553000 scientific research building 8, Shuiyue Industrial Park, yuezhao street, Zhongshan District, Liupanshui City, Guizhou Province

Patentee before: Guizhou Huaqi Power Co.,Ltd.