CN106093285A - A kind of multicomponent gas diffusion combustion and combustion monitoring device - Google Patents

A kind of multicomponent gas diffusion combustion and combustion monitoring device Download PDF

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Publication number
CN106093285A
CN106093285A CN201610730457.7A CN201610730457A CN106093285A CN 106093285 A CN106093285 A CN 106093285A CN 201610730457 A CN201610730457 A CN 201610730457A CN 106093285 A CN106093285 A CN 106093285A
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CN
China
Prior art keywords
pipe
combustion
oxidant
combustor
fuel
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CN201610730457.7A
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Chinese (zh)
Inventor
席剑飞
安海洋
顾中铸
Original Assignee
南京师范大学
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Application filed by 南京师范大学 filed Critical 南京师范大学
Priority to CN201610730457.7A priority Critical patent/CN106093285A/en
Publication of CN106093285A publication Critical patent/CN106093285A/en

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N31/00Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
    • G01N31/12Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using combustion

Abstract

The invention discloses a kind of multicomponent gas diffusion combustion and combustion monitoring device.Its burner is arranged on the bottom of combustor, and ignition electrode is placed in above combustor fuel nozzle.Air supply system is made up of mixed fuel pipe, oxidant pipe and diluent pipe.The fuel nozzle that mixed fuel pipe is burner provides air mixture, and the cylindricality oxidant nozzle that oxidant pipe is burner provides oxidant, diluent pipe and mixed fuel pipe and oxidant pipe threeway.Diluent selects to add between fuel-side and oxidant side.The flue gas that burning produces is extracted out by axial flow blower in real time, it is ensured that the flame stable burning in combustor.High-speed camera instrument can be observed gas combustion phenomenon by quartz window and flame is carried out Taking Pictures recording, and the composition of combustion product gases can be monitored by flue gas analyzer in real time.Apparatus of the present invention not only compact conformation, the suitability are wide, easy to operate, and can produce stable diffusion flame, and combustion phenomena is carried out on-line monitoring.

Description

A kind of multicomponent gas diffusion combustion and combustion monitoring device
Technical field
The present invention relates to a kind of gaseous diffusion combustion experimental provision, a kind of multicomponent gas diffusion combustion Burn experiment and combustion monitoring device, for the study on monitoring of multicomponent gas diffusion combustion phenomenon.
Background technology
For solid fuel, gaseous fuel because having that ignition temperature is low, can easily be accommodated, without ash, can long distance Have a wide range of applications from advantages such as conveyings.Diffusion combustion is the common combustion system of one of gaseous fuel, has burner Simple in construction, calory burning are high, without plurality of advantages such as tempering danger.But for some fuel, use diffusion combustion mode easily to produce Raw localized hyperthermia phenomenon, generates the atmosphere pollutions such as more nitrogen oxides and soot.Accordingly, it would be desirable to gas with various fuel The generation of diffusion combustion characteristic and pollutant is furtherd investigate with control.
But existing diffusion combustion device is when carrying out the big flow combustion experiment of multicomponent gas, flame is unstable Fixed.Lack corresponding method simultaneously and the pollutant in combustion flame and flue gas are carried out on-line monitoring, it is impossible to obtain easily Combustion characteristics under different condition and Pollutant Formation.
Summary of the invention
Unstable in order to solve prior art Flame, the problem that combustion position cannot monitor in real time and regulate, the present invention Provide a kind of multicomponent gas diffusion combustion and combustion monitoring device.This device can for multicomponent gas diffusion combustion To produce stable diffusion flame, and combustion phenomena is carried out on-line monitoring.Experiment for multicomponent gas diffusion combustion is ground Study carefully.
The invention provides a kind of multicomponent gas diffusion combustion and combustion monitoring device, including air supply system, combustion Burn room, burner, ignition system and monitoring system.
Described combustor is a hermetic container, pref. cylindrical rustless steel hermetic container.Aim to provide a stable closing Burning situation.Burner is arranged on the bottom of combustor.The ignition electrode of ignition system is located on sidewall of combustion chamber, presses close to burning Above device fuel nozzle.
Burner is made up of fuel nozzle and cylindricality oxidant nozzle.Wherein fuel nozzle is positioned at cylindricality oxidant nozzle Central authorities, filler metal foam in the cylinder of cylindricality oxidant nozzle, it is possible to provide stable, uniform oxidant.On this basis, combustion Burner can make fuel realize stable diffusion combustion.
Air supply system is made up of mixed fuel pipe, oxidant pipe and diluent pipe.Described mixed fuel pipe one The fuel nozzle of termination burner, the other end is divided into some gas bomb interfaces, and oxidant pipe is connected on the cylindricality oxidation of burner On agent nozzle.Diluent pipe connecting tee valve, two other valve port of three-way valve connects mixed fuel pipe and oxygen respectively Agent pipe.Various diluent is allowed to select to add end and adding proportion between fuel-side and oxidant side.
Each gas bomb interface, oxidant pipe and the diluent Guan Jun of mixed fuel pipe are with mass flow Meter, for each gas component of accurate measurement, controls the gas mixture ratio example of mixed fuel, metering/control oxidant and dilute Release the addition of agent.
Bleeding point is had, by pipeline connecting shaft flow fan on the top of combustor.By regulating the flow of axial flow blower, The flue gas that burning can be made to produce is extracted out in real time, it is ensured that the flame stable burning in combustor.
Monitoring system is made up of high-speed camera instrument and flue gas analyzer.Flue gas analyzer is connected on combustor bleeding point to axial flow On the pipeline of blower fan.Setting quartz window on sidewall of combustion chamber, the pick-up lens of high-speed camera instrument is at quartz window window Mouthful.High-speed camera instrument can be observed gas combustion phenomenon by quartz window and flame is carried out Taking Pictures recording, flue gas analyzer The composition of combustion product gases can be monitored in real time.
Ignition system is made up of ignition electrode, ignition switch, electric spark igniter high voltage package bag concatenation, can produce high-tension electricity Spark realizes the IGNITION CONTROL of gaseous fuel.
Further, apparatus of the present invention are additionally provided with multifunctional gas alarm, are placed near combustor and air supply system.Can examine Measuring the fuel gas such as hydrogen, carbon monoxide, methane, gas leakage once occurs, alarm will send alarm and block gas confession Give, to ensure the safety of experiment and personnel.
Compared with existing gaseous diffusion combustion device, apparatus of the present invention, compact conformation, easy to operate.Multicomponent gas mixes It is convenient to close, and allows various diluent to select to add end and adding proportion between fuel-side and oxidant side simultaneously, can be greatly Stable diffusion combustion flame is produced under gas flow.Can be used for the diffusion combustion of different component, different proportion mixed fuel Burn the research of characteristic.
Accompanying drawing explanation
Fig. 1 is multicomponent gas diffusion combustion of the present invention and combustion monitoring apparatus structure schematic diagram.
In figure, reference is: 1-gas fuel source (can select according to needs), 2-mass flowmenter, 3-three-way valve, 4- Fuel nozzle, 5-cylindricality oxidant nozzle, 6-electric spark igniter high voltage package, 7-ignition switch, 8-combustor is (cylindrical stainless Steel hermetic container), 9-burner, 10-metal foam, 11-high-speed camera instrument, 12-flue gas analyzer, 13-quartz window, 14-flame, 15-ignition electrode, 17-multifunction alarm device, 18-infinitely variable speeds axial flow blower, 19-valve.
Detailed description of the invention
With reference to accompanying drawing, describe the present invention below.
Fig. 1 is multicomponent gas diffusion combustion of the present invention and combustion monitoring apparatus structure schematic diagram.Including supply system System, ignition system, burner, combustor, detecting system and warning system.
Described combustor 8 is cylindrical rustless steel hermetic container, it is desirable to provide a resistant-walled burning situation.Burning Device 9 is arranged on the bottom of combustor 8.
Burner 9 is made up of fuel nozzle 4 and cylindricality oxidant nozzle 5.Wherein fuel nozzle 4 is positioned at the spray of cylindricality oxidant The central authorities of mouth 5, filler metal foam 10 in the cylinder of cylindricality oxidant nozzle, it is possible to provide stable, uniform oxidant.Fuel sprays Mouth 4 provides multicomponent gas fuel, oxidant nozzle 5 to provide oxidant, metal foam 10 that oxidizer flow is risen rectified action, Stable oxidant flow field can be provided in the certain border circular areas centered by fuel nozzle.On this basis, burner can Fuel is made to realize stable diffusion combustion.
Air supply system is made up of mixed fuel pipe 20, oxidant pipe 21 and diluent pipe 22.Described mixed gas is fired Material pipe one terminates the fuel nozzle 4 of burner 9, and the other end is divided into some gas bomb interfaces, connects the gas steel of gas with various Bottle.Oxidant pipe 21 is connected on the cylindricality oxidant nozzle 5 of burner, and another terminates oxidant steel cylinder.Diluent pipe 22 connects Three-way valve 3, two other valve port of three-way valve 3 connects mixed fuel pipe 20 and oxidant pipe 21 respectively.Allow various Diluent selects to add end and adding proportion between fuel-side and oxidant side.
Each gas bomb interface, oxidant pipe 21 and the diluent pipe 22 of mixed fuel pipe 20 are all with quality Effusion meter 2, for each gas component of accurate measurement, controls the gas mixture ratio example of mixed fuel, metering/control oxidant Addition with diluent.
Ignition system is wrapped concatenation constituted by ignition electrode 15, ignition switch 7, electric spark igniter high voltage package 6, can produce height Piezo spark realizes the IGNITION CONTROL of gaseous fuel.The ignition electrode 15 of ignition system is located on sidewall of combustion chamber, presses close to burner Above fuel nozzle.Wherein, electric spark igniter high voltage package 6 is connected with 220V alternating current power supply, in order to provide ignition voltage.Switch 7 control the duration of ignition.Ignition electrode 15 is placed in appropriate position above fuel nozzle, and its electric spark produced can realize gaseous fuel Fast and stable catch fire.
Bleeding point is had, by pipeline connecting shaft flow fan 18 respectively on the top of combustor 8.By regulation axial flow blower Flow, the flue gas that burning can be made to produce is extracted out in real time, it is ensured that the flame stable burning in combustor.
Monitoring system is made up of high-speed camera instrument 11 and flue gas analyzer 12.Flue gas analyzer 12 is connected on combustor bleeding point To the pipeline of axial flow blower.Setting quartz window 13 on sidewall of combustion chamber, the pick-up lens of high-speed camera instrument 11 is at stone English windowpane 13 window.High-speed camera instrument can observe gas combustion phenomenon note of taking pictures flame by quartz window Record, the composition of combustion product gases can be monitored by flue gas analyzer in real time.
Multifunctional gas alarm 17, is placed near combustor and air supply system.Can detect that hydrogen, carbon monoxide, first , once there is gas leakage in the fuel gas such as alkane, alarm will send alarm and block gas supply, to ensure experiment and personnel's Safety.
The present invention to realize process as follows:
In Fig. 1, in air supply system, by regulation mass flowmenter 2 can produce different component, ratio and flow fuel gas, Oxidant and diluent.The interpolation position (fuel-side or oxidant side) of diluent is determined by regulating three-way valve door 3.Fuel Nozzle 4, cylindricality oxidant nozzle 5 are respectively to providing multicomponent gas fuel and oxidant, at the high-tension electricity that ignition electrode 15 produces Realize catching fire of gaseous fuel under the effect of spark, in cylindrical rustless steel hermetic container 8, produce stable diffusion combustion fire Flame 14;Flame is taken pictures and record by high-speed camera instrument 11 in real time, and the tail gas that burning is produced by flue gas analyzer 12 carries out reality Time monitoring analyze, experiment gases used is monitored by multifunction alarm device 17 in real time, it is ensured that equipment and the safety of personnel.
The present invention to implement example as follows:
Example Incendiary type Diluent kind Diluent adds side The emission index of NOx is with the variation tendency of diluent The emission index of CO is with the variation tendency of diluent
Methane/air laminar flow diffusion combustion Nitrogen (N<sub>2</sub>) Fuel-side First increase and subtract afterwards First increase and subtract afterwards
Methane/air laminar flow diffusion combustion Nitrogen (N<sub>2</sub>) Oxidant side Monotone decreasing Monotone decreasing
Methane/air laminar flow diffusion combustion Carbon dioxide (CO<sub>2</sub>) Fuel-side Monotone decreasing Monotone decreasing
Methane/air laminar flow diffusion combustion Carbon dioxide (CO<sub>2</sub>) Oxidant side Monotone decreasing Monotone decreasing

Claims (4)

1. multicomponent gas diffusion combustion and a combustion monitoring device, including air supply system, combustor, burner, point Fire system and monitoring system;It is characterized in that:
Described combustor is a hermetic container;Burner is arranged on the bottom of combustor, and the ignition electrode of ignition system is located at burning On the sidewall of room, press close to above combustor fuel nozzle;
Described burner, is made up of fuel nozzle and cylindricality oxidant nozzle, and wherein, fuel nozzle is positioned at cylindricality oxidant nozzle Central authorities, filler metal foam in the cylinder of cylindricality oxidant nozzle;
Described air supply system, is made up of mixed fuel pipe, oxidant pipe and diluent pipe;Described mixed fuel pipe one The fuel nozzle of termination burner, the other end is divided into some gas bomb interfaces;Oxidant pipe is connected on the cylindricality oxidation of burner On agent nozzle;Diluent pipe connecting tee valve, two other valve port of three-way valve connects mixed fuel pipe and oxygen respectively Agent pipe;
Bleeding point is had, by pipeline connecting shaft flow fan on the top of combustor;
Described monitoring system, is made up of high-speed camera instrument and flue gas analyzer;Flue gas analyzer is connected on combustor bleeding point to axle On the pipeline of flow fan;Setting quartz window on sidewall of combustion chamber, the pick-up lens of high-speed camera instrument is at quartz window Window.
The most according to claim 1, multicomponent gas diffusion combustion and combustion monitoring device, is characterized in that: described burning Room is cylindrical rustless steel hermetic container.
The most according to claim 1, multicomponent gas diffusion combustion and combustion monitoring device, is characterized in that: mixed gas Each gas bomb interface, oxidant pipe and the diluent Guan Jun of cartridge are with mass flowmenter.
The most according to claim 1, multicomponent gas diffusion combustion and combustion monitoring device, is characterized in that: be provided with many merits Energy gas alarm, multifunctional gas alarm is placed at combustor and air supply system.
CN201610730457.7A 2016-08-26 2016-08-26 A kind of multicomponent gas diffusion combustion and combustion monitoring device CN106093285A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106404988A (en) * 2016-11-29 2017-02-15 吉林大学 Fuel,air and diluted gas mixed gas spontaneous combustion and ignition on-fire test device
CN107677764A (en) * 2017-10-24 2018-02-09 江苏大学 A kind of motor fluid fuel combustion characteristics test device and method
CN108169407A (en) * 2017-12-28 2018-06-15 中国矿业大学 A kind of vertical combustion characteristics experimental provision of controllable gas environment, abutment wall structure
CN109682854A (en) * 2018-12-29 2019-04-26 燕山大学 A kind of combustion experiment platform

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CN101876655A (en) * 2009-12-01 2010-11-03 中国检验检疫科学研究院 Gas inflammability tester
CN102375046A (en) * 2010-08-18 2012-03-14 中国科学技术大学 Simulation experiment box
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106404988A (en) * 2016-11-29 2017-02-15 吉林大学 Fuel,air and diluted gas mixed gas spontaneous combustion and ignition on-fire test device
CN106404988B (en) * 2016-11-29 2018-06-01 吉林大学 Fuel-air-diluent gas gaseous mixture spontaneous combustion and light test device of catching fire
CN107677764A (en) * 2017-10-24 2018-02-09 江苏大学 A kind of motor fluid fuel combustion characteristics test device and method
CN107677764B (en) * 2017-10-24 2019-12-03 江苏大学 A kind of motor fluid fuel combustion characteristics test device and method
CN108169407A (en) * 2017-12-28 2018-06-15 中国矿业大学 A kind of vertical combustion characteristics experimental provision of controllable gas environment, abutment wall structure
CN109682854A (en) * 2018-12-29 2019-04-26 燕山大学 A kind of combustion experiment platform

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Application publication date: 20161109