CN202789153U - Gas power generation system and air/gas ratio control system - Google Patents

Gas power generation system and air/gas ratio control system Download PDF

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Publication number
CN202789153U
CN202789153U CN2012203314609U CN201220331460U CN202789153U CN 202789153 U CN202789153 U CN 202789153U CN 2012203314609 U CN2012203314609 U CN 2012203314609U CN 201220331460 U CN201220331460 U CN 201220331460U CN 202789153 U CN202789153 U CN 202789153U
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China
Prior art keywords
gas
control
air
flow
combustion
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CN2012203314609U
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Chinese (zh)
Inventor
何超
冉波
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深圳相控科技股份有限公司
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Priority to CN2012203314609U priority Critical patent/CN202789153U/en
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/10Internal combustion engine [ICE] based vehicles
    • Y02T10/30Use of alternative fuels, e.g. biofuels

Abstract

The utility model discloses a gas power generation system and an air/gas ratio control system. The air/gas ratio control system comprises a flow detector, a gas analyzer, a gas adjusting valve and a control device. The flow detector is used for monitoring the flow of combustible gas and combustion-supporting gas in real time, and monitoring results are reported back by the flow detector to the control device. The gas analyzer is used for analyzing constituents of the combustible gas. Concentration of each constituent is obtained by the gas analyzer and analysis results are sent to the control device by the gas analyzer. Comprehensive calculation of results which are reported back by the flow detector and the gas analyzer is carried out by the control device. Control signals are output by the control device to control the gas adjusting valve. The gas adjusting valve is used for adjusting gas inlet quantity of the combustible gas and the combustion-supporting gas. The gas power generation system and the air/gas ratio control system are used for monitoring parameters such as the constituents and concentration of the constituents of the combustible gas. The constituents and concentration of the constituents of the combustible gas are used as bases of adjustments of the flow of the combustible gas and the combustion-supporting gas. Ratio control of the combustible gas and the combustion-supporting gas is enabled to be reasonable and accurate. Combustion efficiency is improved largely. Running of a cluster engine is stable and efficient.

Description

Fuel gas generation system and air/gas ratio control system
Technical field
The utility model belongs to the fuel gas generation technical field, is specifically related to a kind of air/gas ratio control system for gas engine.
Background technique
Usually, in the fuel gas generation system, the gas engine group is after the mixed gas by combustion gas and air advances people's cylinder, and through plug ignition detonation acting, pushing piston is mobile in cylinder, drives crankshaft rotating, and then drives that motor generates electricity.The burning of mixed gas in motor is an extremely complicated process, its combustion efficiency is subjected to the impact of many factors, wherein, the air fuel ratio of mixed gas is one of very important factor: when only having in air fuel ratio is stabilized in a suitable scope, and the work that motor could be efficient and stable; Simultaneously, air-fuel ratio regulation is not only the adjusting to combustion gas and AIR Proportional, for satisfying under the unit different operating state requirement to rotating speed, must detect rotating speed again, and the air inflow of regulating gas and air, to produce suitable energy for unit operation.And this unit mainly produces biogas with the garbage loading embeading place and acts as a fuel, and the calorific value fluctuation is obvious, and parameter is unstable, and this just regulates the intellectuality of air fuel ratio and has proposed further requirement, works efficiently to realize set steady.
The common extensive adoption rate valve of fuel gas generation system comes adjusting air-fuel ratio at present, and this dull joint method can only be come according to the suction pressure of the combustion-supporting gases such as air, oxygen the regulating gas air inflow.If combustion gas purity or component change, then not only can't improve combustion efficiency by the method, can reduce the combustion gas utilization ratio on the contrary.As, when the inflammable gas suction pressure is constant, when purity reduces, can cause the air quantity that feeds too much, combustion temperature reduces, and causes incomplete combustion.Because the exhaust gas volumn that partial combustion produces is too much, can increase the waste heat loss of smoke evacuation tail gas simultaneously.
Under the specific conditions such as some fuel gases calorific value change, as, marsh gas power generation etc., biogas flow and methane in sewage gas concentration all might can't keep constant in its combustion system.Thereby, for the real-time tracking combustion efficiency achieves optimum state, reach as far as possible desirable level, just need the burning data such as Real-Time Monitoring gas concentration, flow, and according to detecting data simultaneously regulating gas and combustion-supporting gas flow.
The model utility content
The purpose of this utility model is: a kind of fuel gas generation system and air/gas ratio control system thereof are provided,
For achieving the above object, the utility model provides a kind of air/gas ratio control system, comprises flow detector, gas analyzer, gas control valve and control gear; Wherein:
Described flow detector is used for the flow of Real-Time Monitoring inflammable gas and combustion-supporting gas, and monitoring result is fed back to control gear;
Described gas analyzer, the concentration that is used for analyzing the composition of inflammable gas and records each composition sends to described control gear with analysis result;
Described control gear carries out COMPREHENSIVE CALCULATING with the result of described flow detector and gas analyzer feedback, and the output control signal is controlled described gas control valve;
Described gas control valve is regulated respectively inflammable gas and combustion-supporting gas air inflow according to the control signal of described control gear.
Above-mentioned air/gas ratio control system, in the mode of execution wherein, described control gear comprises process control machine or PLC controller.
Above-mentioned air/gas ratio control system, in the mode of execution wherein, described control gear also comprises flow integrator, be used for the testing result according to analysis result and the flow detector of gas analyzer, calculate the inflammable gas mass fraction, and result of calculation is offered described process control machine or PLC controller.
Above-mentioned air/gas ratio control system in the mode of execution wherein, also comprises temperature monitor, is used for the Real-Time Monitoring chamber temperature, and monitoring result is fed back to described control gear.
Above-mentioned air/gas ratio control system in the mode of execution wherein, also comprises the rotating speed detector, is used for detecting in real time the rotating speed of gas engine, and testing result is fed back to control gear.
Above-mentioned air/gas ratio control system, in the mode of execution wherein, described flow detector comprises flowmeter, temperature transducer and pressure transducer; Described temperature transducer is connected with pressure transducer with described control gear and is connected, and compensates calculating in order to the flow information to described flowmeter feedback.
Above-mentioned air/gas ratio control system, in the mode of execution wherein, described flow detector comprises first flow detector and the second flow detector, and described first flow detector is for detection of the inflammable gas flow, and described the second flow detector is for detection of the combustion-supporting gas flow.
Above-mentioned air/gas ratio control system, in the mode of execution wherein, described gas control valve comprises the first gas control valve and the second gas control valve, and described the first gas control valve is used for regulating the inflammable gas flow, and described the second gas control valve is used for regulating the combustion-supporting gas flow.
Simultaneously, the utility model proposes a kind of fuel gas generation system, it adopts above-mentioned air/gas ratio control system.
Compared with prior art, the air/gas ratio control system that the utility model embodiment provides, respectively inflammable gas and combustion-supporting gas are detected, and the parameters such as the composition by gas analyzer Real-Time Monitoring inflammable gas and concentration, offer the mass fraction that control gear calculates inflammable gas in real time, regulate respectively the flow of inflammable gas and combustion-supporting gas, make the ratio adjusting of inflammable gas and combustion-supporting gas more reasonable, accurate, significantly improved combustion efficiency, the operation of cluster engine is more stable and efficient.
Further, among the embodiment, go back simultaneously the comprehensively real-time parameters such as the temperature of engine chamber, engine speed; Operation control effect to cluster engine is more desirable and accurate.
Description of drawings
A kind of air/gas ratio control system block diagram that Fig. 1 provides for the utility model embodiment one;
A kind of air/gas ratio control system block diagram that Fig. 2 provides for the utility model embodiment two;
The air/gas ratio control system working principle block diagram that Fig. 3 provides for the utility model embodiment two.
Embodiment
For making the purpose of this utility model, technological scheme and advantage clearer, below in conjunction with drawings and Examples the utility model is described in further detail.
Embodiment one
The fuel gas generation system that this is routine comprises gas engine, air-fuel ratio regulation system etc.; Gas engine belongs to prior art, and this example does not elaborate; The air/gas ratio control system is used for regulating the ratio of air and combustion gas, improves the combustion efficiency of combustion gas in the firing chamber of gas engine.
See also shown in Figure 1ly, Fig. 1 comprises flow detector, temperature monitor, gas analyzer, gas control valve and control gear for a kind of air/gas ratio control system block diagram that present embodiment provides.Preferably, control gear is process control machine or PLC controller.
Flow detector is for detection of the flow of inflammable gas in the fuel tube and combustion-supporting gas, and testing result is fed back to control gear.Temperature monitor is for detection of the temperature in the firing chamber, and testing result is fed back to control gear.Gas analyzer is analyzed the composition of inflammable gas and is measured the concentration of each composition, and analysis result is sent to control gear.
Control gear carries out comprehensive computing with the testing result of flow detector, temperature monitor and gas analyzer feedback, and compares with desired value, and the output control signal is to gas control valve.Because gas analyzer detects in real time effective component and the content of combustion-supporting gas and feeds back to control gear, gas control valve is according to the control signal of control gear, regulate respectively the flow of inflammable gas and combustion-supporting gas, make the ratio adjusting of inflammable gas and combustion-supporting gas more reasonable, accurate, so that the combustion efficiency of firing chamber reaches re-set target, motor can the output of stability and high efficiency ground.
Wherein, flow detector comprises: for detection of the first flow detector of inflammable gas flow, for detection of the second flow detector of combustion-supporting gas (air) flow; Gas control valve comprises: for the first gas control valve of regulating the inflammable gas flow, for the second gas control valve of regulating combustion-supporting gas (air) flow.
Embodiment two
In the fuel gas generation system of present embodiment, a kind of air/gas ratio control system that wherein provides, the parameters such as the composition by the Real-Time Monitoring inflammable gas and concentration are calculated the mass fraction of inflammable gas, the real-time parameters such as the temperature of simultaneously comprehensive engine chamber, engine speed in real time; Regulate respectively the flow of inflammable gas and combustion-supporting gas, make the ratio adjusting of inflammable gas and combustion-supporting gas more reasonable, accurate, so that the combustion efficiency of firing chamber improves, motor can the output of stability and high efficiency ground.
See also Fig. 2 and shown in Figure 3, a kind of air/gas ratio control system block diagram that Fig. 2 provides for present embodiment, Fig. 3 is the working principle block diagram of Fig. 2 air/gas ratio control system.Present embodiment air/gas ratio control system comprises flow detector, temperature monitor, gas analyzer, gas control valve, rotating speed detector, and control gear; Control gear wherein comprises process control machine and flow integrator; Flow integrator is according to the analysis result of gas analyzer to combustible gas component and content etc., and according to the testing result of flow detector, calculates the inflammable gas mass fraction, obtains the gaseous mass that really can burn, and result of calculation is offered process control machine.The rotating speed detector adopts speed probe, for detection of the rotating speed of motor, and testing result is fed back to process control machine.Process control machine compares testing result and the desired value of flow detector, temperature monitor, gas analyzer, flow integrator and speed probe feedback, and the output control signal is to gas control valve.Gas control valve is regulated respectively the flow of inflammable gas and combustion-supporting gas according to the control signal of process control machine, so that the combustion efficiency of firing chamber reaches re-set target, and the output that motor can stability and high efficiency.
Wherein, flow detector comprises: for detection of the first flow detector of inflammable gas flow, for detection of the second flow detector of combustion-supporting gas (air) flow; Gas control valve comprises: for the first gas control valve of regulating the inflammable gas flow, for the second gas control valve of regulating combustion-supporting gas (air) flow.
Above-mentioned first flow detector or the second flow detector can comprise: flowmeter, temperature transducer and pressure transducer; Temperature transducer wherein is connected with system controller with pressure transducer and is connected, and in order to flow information that flowmeter feeds back is carried out the temperature and pressure compensation, the result of flow detection is more reasonable accurate like this.
Above content is in conjunction with concrete mode of execution further detailed description of the utility model, can not assert that implementation of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, without departing from the concept of the premise utility, can also make some simple deduction or replace, all should be considered as belonging to protection domain of the present utility model.Such as, the function of flow integrator can directly be realized by process control machine or PLC etc.

Claims (10)

1. a gas engine air/gas ratio control system is characterized in that, comprises flow detector, gas analyzer, gas control valve and control gear; Wherein:
Described flow detector is used for the flow of Real-Time Monitoring inflammable gas and combustion-supporting gas, and monitoring result is fed back to control gear;
Described gas analyzer, the concentration that is used for analyzing the composition of inflammable gas and records each composition sends to described control gear with analysis result;
Described control gear carries out COMPREHENSIVE CALCULATING with the result of described flow detector and gas analyzer feedback, and the output control signal is controlled described gas control valve;
Described gas control valve is regulated respectively inflammable gas and combustion-supporting gas air inflow according to the control signal of described control gear.
2. air/gas ratio control system according to claim 1 is characterized in that, described control gear comprises process control machine or PLC controller.
3. air/gas ratio control system according to claim 2, it is characterized in that, described control gear also comprises flow integrator, be used for the testing result according to analysis result and the flow detector of gas analyzer, calculate the inflammable gas mass fraction, and result of calculation is offered described process control machine or PLC controller.
4. each described air/gas ratio control system is characterized in that according to claim 1-3, also comprises temperature monitor, is used for the Real-Time Monitoring chamber temperature, and monitoring result is fed back to described control gear.
5. each described air/gas ratio control system is characterized in that according to claim 1-3, also comprises the rotating speed detector, is used for detecting in real time the rotating speed of gas engine, and testing result is fed back to control gear.
6. each described air/gas ratio control system is characterized in that described flow detector comprises flowmeter, temperature transducer and pressure transducer according to claim 1-3; Described temperature transducer is connected with pressure transducer with described control gear and is connected, and carries out the temperature and pressure compensation in order to the flow information to described flowmeter feedback.
7. each described air/gas ratio control system according to claim 1-3, it is characterized in that, described flow detector comprises first flow detector and the second flow detector, described first flow detector is for detection of the inflammable gas flow, and described the second flow detector is for detection of the combustion-supporting gas flow.
8. each described air/gas ratio control system according to claim 1-3, it is characterized in that, described gas control valve comprises the first gas control valve and the second gas control valve, described the first gas control valve is used for regulating the inflammable gas flow, and described the second gas control valve is used for regulating the combustion-supporting gas flow.
9. air/gas ratio control system according to claim 5 is characterized in that, described rotating speed detector is speed probe.
10. a fuel gas generation system is characterized in that: comprise such as each described air/gas ratio control system among the claim 1-9.
CN2012203314609U 2012-07-10 2012-07-10 Gas power generation system and air/gas ratio control system CN202789153U (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103790725A (en) * 2014-02-20 2014-05-14 贵州振丰燃气发电设备有限公司 Air-fuel ratio automatic control system of gas engine
CN105244844A (en) * 2015-10-23 2016-01-13 河南柴油机重工有限责任公司 Landfill gas pretreatment monitoring device and method
CN105909375A (en) * 2016-05-27 2016-08-31 四川博世德节能环保工程有限公司 Power generation system
CN105909374A (en) * 2016-05-27 2016-08-31 四川博世德节能环保工程有限公司 Gas continuous power generating device
CN106285967A (en) * 2016-08-11 2017-01-04 淄博淄柴新能源有限公司 Jet dynamic control realizes power maximized air-fuel ratio autocontrol method
CN107339159A (en) * 2016-05-02 2017-11-10 曼柴油机欧洲股份公司曼柴油机德国分公司 Internal combustion engine with fuel gas property measurement system
CN108240261A (en) * 2017-12-13 2018-07-03 重庆长安铃木汽车有限公司 A kind of flexible fuel engine Gas Components Self-learning Controller and control method

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103790725A (en) * 2014-02-20 2014-05-14 贵州振丰燃气发电设备有限公司 Air-fuel ratio automatic control system of gas engine
CN105244844A (en) * 2015-10-23 2016-01-13 河南柴油机重工有限责任公司 Landfill gas pretreatment monitoring device and method
CN107339159B (en) * 2016-05-02 2019-11-08 曼能解决方案(曼能解决方案德国股份公司)分公司 Internal combustion engine with fuel gas property measurement system
CN107339159A (en) * 2016-05-02 2017-11-10 曼柴油机欧洲股份公司曼柴油机德国分公司 Internal combustion engine with fuel gas property measurement system
CN105909374A (en) * 2016-05-27 2016-08-31 四川博世德节能环保工程有限公司 Gas continuous power generating device
CN105909375A (en) * 2016-05-27 2016-08-31 四川博世德节能环保工程有限公司 Power generation system
CN106285967A (en) * 2016-08-11 2017-01-04 淄博淄柴新能源有限公司 Jet dynamic control realizes power maximized air-fuel ratio autocontrol method
CN106285967B (en) * 2016-08-11 2019-04-30 淄博淄柴新能源有限公司 Jet dynamic control realizes the maximized air-fuel ratio autocontrol method of power
CN108240261A (en) * 2017-12-13 2018-07-03 重庆长安铃木汽车有限公司 A kind of flexible fuel engine Gas Components Self-learning Controller and control method

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