CN101832871B - Method for determining combustion adaptive domain of gas appliance - Google Patents
Method for determining combustion adaptive domain of gas appliance Download PDFInfo
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- CN101832871B CN101832871B CN 200910068118 CN200910068118A CN101832871B CN 101832871 B CN101832871 B CN 101832871B CN 200910068118 CN200910068118 CN 200910068118 CN 200910068118 A CN200910068118 A CN 200910068118A CN 101832871 B CN101832871 B CN 101832871B
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Abstract
The invention discloses a method for determining a combustion adaptive domain of a gas appliance, which comprises the following steps of: preparing different test gases of multiple kinds of gas by adopting various pure gas components or various multi-gas components, performing combustion condition test on the same gas appliance, and performing corresponding gas preparing component adjustment according to different gas component ratios corresponding to yellow tip or incomplete combustion, backfire, flame-lift limit combustion phenomenon so as to respectively prepare a plurality of groups of gas preparing test gas corresponding to the limit working conditions; calculating combustion characteristic indexes of gas preparing reference gas and test gas corresponding to the limit working conditions, and selecting representative two or three combustion characteristic indexes of the reference gas and test gas to establish a two-dimensional or three-dimensional coordinate system; and enclosing a closed region (body) by a curve connected by coordinates corresponding to the selected combustion characteristic indexes, wherein the closed region is the stable combustion adaptive domain of the gas appliance. The invention provides a practical and feasible technical method for quantitative evaluation of the stability of the gas appliance.
Description
Technical field:
The invention belongs to the gas field, relate to a kind of different distributions test gas with combustion gas, when determining the gas utensil normal combustion, gas utensil adapts to the method for the scope (adaptive domain of gas utensil) that gas component changes.
Background technology:
At present, the gas source of the gas adopts rock gas (NG), liquefied petroleum gas (LPG) (LPG) or artificial coal gas mostly.Accounting for most domestic gas tools in cities and towns is the atmospheric gas apparatus.The ability that each gas utensil has certain adaptation Gas Components to change.During the exploitation gas utensil, at first to determine to use certain class combustion gas as the reference gas of this gas utensil, according to this reference gas design, typing or production.Also need before dispatching from the factory according to the requirement (comprising pressure) of combustion gas reference gas and boundary test gas, it to be carried out examination and adjustment.If the reference gas of the combustion gas of city supply during for this gas utensil design and typing, gas utensil duty the best.
When Gas Components and character changed, its duty must change.If Gas Components changes in a certain compass, gas utensil still can guarantee normal operation, this be gas utensil to the adaptive faculty of gas component, be called the adaptability of gas utensil; The scope that adapts to the gas component variation is called the adaptive domain of gas utensil.The scope of adaptive domain is wider, and the ability that the expression gas utensil adapts to the gas component variation is stronger.
Gas utensil is manufactured enterprise and supplier, the gas utensil of each pattern of production, the especially new gas utensil of design, carry out type inspection, when determining the burning performance of gas utensil, can by measuring the adaptive domain of this burner, determine its adaptive domain figure, its combustion characteristics of explication.The gas utensil of manufacturing is satisfied outside the request for utilization of combustion gas Specification, through its adaptive domain of precise positioning, can also expand the scope of application of gas utensil, increase the degree of accuracy that the applicable Gas Components of gas utensil changes, carry out quantitatively evaluating for the stability to gas utensil, practical, feasible technical method is provided.
Summary of the invention:
The object of the invention is to determine to guarantee the adaptive domain that each limit gas of gas utensil normal combustion surrounds, and a kind of solution that proposes, the method is that the test gas that will prepare carries out combustion testing on gas utensil, according to rough burning, tempering occurring, taking off the corresponding combustibility index of combustion gas during operating mode such as fire, choose certain two or three combustibility indexes of representative reference gas and test gas, set up two dimension or three-dimensional system of coordinate; The closed region that the Curves that corresponding test operating mode coordinate points forms surrounds just consists of the smooth combustion adaptive domain of gas utensil.
Technical scheme of the present invention is: a kind of method for determining combustion adaptive domain of gas appliance is characterized in that: carry out according to the following step:
(1) according to the type of test gas utensil, select suitable reference gas; Calculate each corresponding combustibility index corresponding to this reference gas, according to the burning performance parameter of reference gas, determine that gas utensil is normal, the optimum condition point during steady operation;
(2) according to GB/T 13611 regulations, component and combustibility index with reference to the yellow flame under this reference gas classification or rough burning limit gas, prepare the test gas of yellow flame or rough burning limit gas, and limit gas component and the corresponding burning performance parameter of confirmed test gas when yellow flame or rough burning occur;
(3) adjust the component ratio of distribution unstripped gas, reduce gradually inert composition content or the slow gas composition of increase burning rate in the distribution unstripped gas, new distribution test pneumatic transmission is entered the gas utensil burning, until yellow flame or rough burning occur, obtain new many groups of yellow flames or rough burning boundary state point, should obtain at least 4～5 yellow flames or rough burning state point during test;
(4) according to the combustibility index of reference gas and yellow flame or rough burning boundary test gas, choose representative certain two or three combustibility indexes, set up two dimension or three-dimensional system of coordinate; The curve that the yellow flame that the combustibility index of these selections is corresponding or rough burning boundary state coordinate point are linked to be is yellow flame or the rough burning curve of testing gas;
(5) according to step (2), (3), (4), in the same coordinate system, take same method, the test gas tempering combustion curve when determining tempering and taking off fiery ultimate limit state, take off fiery combustion curve.When determining tempering curve, for obtaining tempering ultimate limit state point, can increase gradually fast gas composition or the slow gas composition of minimizing burning rate of burning rate in unstripped gas; When determining to take off fiery curve, for obtaining taking off fiery ultimate limit state point, can increase gradually inert composition or the fast gas composition of minimizing burning rate in unstripped gas;
The curve that coordinate points corresponding to the suitable combustibility index of choosing like this forms is three: the yellow flame of test gas or rough burning curve, test gas tempering combustion curve, take off fiery combustion curve; Article three, the closed region that surrounds of curve, with calorific value, C3 and above component concentration, relative density, fuel gas buring speed, yellow flame index, knot carbon index, above-mentioned different index is combined to form the closed region, has consisted of the adaptive domain of gas utensil smooth combustion or has adapted to body.
Advantage of the present invention is: the test gas of the various combustion conditions that can form according to multiple distribution unstripped gas, accurately locate the scope of application and the adaptive domain of gas utensil; Adopt the various gas burning performance parameter, set up coordinate system clear, multidimensional, the state point of gas utensil under the otherwise limit combustion conditions defined.Solved current method for determining combustion adaptive domain of gas appliance disappearance problem, carried out quantitatively evaluating for the stability to gas utensil, practical, feasible technical method is provided.
Description of drawings:
Fig. 1 is the method schematic diagram of determining gas utensil normal combustion adaptive domain, wherein: the 1st, yellow flame or rough burning curve; The 2nd, tempering curve; The 3rd, take off fiery curve; The B point is the reference gas working point.
Embodiment:
A kind of method of definite gas utensil normal combustion adaptive domain, as shown in Figure 1, carry out according to the following step:
(1) according to the type of test gas utensil, select suitable reference gas.As for the gas utensil take certain class natural gas as reference gas, determine at first that gas utensil is normal, the optimum condition point during steady operation, calculate each corresponding combustibility index corresponding to this reference gas.
Fig. 1 selects respectively to test gas firing gesture, test gas Wobbe index, three combustibility indexes of reference gas calorific value, as the X, Y, Z axis of the three-dimensional coordinate of setting up adaptive domain.And the optimum Working point B that keeps reference gas is constant, carries out following test.
(2) according to GB/T 13611 regulations, with reference to component and the combustibility index of the yellow flame limit gas under this reference gas classification, prepare the test gas of yellow flame limit gas.Under 1.5 times of specified oven former pressures, determine to carry out on device combustion testing at combustion adaptive domain of gas appliance, observation burning test result; When flame deliquescing and elongation, slightly there is yellow point at its flame top or local yellow flame occurs, even produce uncombined carbon, during incomplete combustion, this state is yellow flame boundary state, record Gas Components and the burning performance parameter value of test gas under this state, limit gas component and the corresponding burning performance parameter of yellow flame for occuring in this.If yellow flame does not appear in this test gas, finely tune some inflammable gas component, until yellow flame boundary state occurs.
(3) adjust the component ratio of distribution unstripped gas, the proportioning of other inflammable gass in feed change gas reduces in the distribution unstripped gas gradually as N
2Etc. inert composition content, or reduce H in unstripped gas
2, the fast gas composition of burning rate such as CO, or increase burning rate in unstripped gas slow as C
3H
8, C
4H
10Deng heavy hydrocarbon components content, under same oven former pressure, new distribution test pneumatic transmission is entered the gas utensil burning, until yellow flame occurs, in the two dimensional surface coordinate system of test gas Wobbe index (Y-axis), test gas firing gesture (X-axis), obtain many groups of new yellow flame boundary state points.Should obtain at least 4～5 yellow flame state points during test.
(4) at the two-dimensional coordinate system of setting up, according to the Wobbe index of yellow flame boundary test gas, the calculated value of combustion potential, the yellow flame boundary state coordinate point of correspondence is linked obtain curve 1, be yellow flame or the rough burning curve of testing gas.
(5) according to GB/T 13611 regulations, with reference to component and the burning performance parameter of the tempering limit gas under this reference gas classification, the test gas of preparation tempering limit gas.Under 0.5 times of specified oven former pressure, determine to carry out on device combustion testing at combustion adaptive domain of gas appliance, observation burning result, when flame height reduces gradually, flame is scurried into the burning fire hole, and when tempering phenomenon occuring or tempering trend being arranged (sound of shouting before tempering), this state is tempering boundary state, record Gas Components and the burning performance parameter value of test gas under this state, limit gas component and the corresponding burning performance parameter of tempering for occuring in this.If tempering does not appear in this test gas, finely tune the fastest inflammable gas component of some burning rate, until tempering boundary state occurs.
(6) change the component ratio of distribution unstripped gas, reduce in the distribution unstripped gas as C
3H
8, C
4H
10Etc. the burning rate content of slow combustible component, or increase as H gradually
2, the fast gas composition of burning rate in the unstripped gas such as CO, new test pneumatic transmission is entered the gas utensil burning under same oven former pressure, until the generation tempering in the two-dimensional coordinate system of test gas Wobbe index (Y-axis), combustion potential (X-axis), obtains new many groups Annealed Strip point.Should obtain at least 4～5 Annealed Strip points during test.
(7) fasten at the two-dimensional coordinate of setting up, according to the Wobbe index of tempering boundary test gas, the calculated value of combustion potential, link corresponding tempering boundary state coordinate point, obtain curve 2, be the tempering curve of test gas.
(8) for from flame or take off fire test gas, with reference to the component of taking off fiery limit gas and the burning performance parameter under this reference gas classification, the test gas of fiery limit gas is taken off in preparation.Under 1.5 times of specified oven former pressures, determine to carry out on device combustion testing at combustion adaptive domain of gas appliance, observation burning result, when flame leaves fire hole, formation is during from flame, this state records Gas Components and the burning performance parameter value of test gas under this state for taking off pyrosphere limit state, and this is for taking off limit gas component and the corresponding burning performance parameter of fire.If fire does not appear taking off in this test gas, finely tune the slowest inflammable gas component of some burning rate, until pyrosphere limit state occurs taking off.
(9) change the component ratio of distribution unstripped gas, reduce in the distribution unstripped gas as H
2Etc. the burning rate content of fast combustible component, or increase gradually in unstripped gas as N
2, CO
2Etc. inert composition, under same oven former pressure, new test pneumatic transmission is being entered the gas utensil burning, until take off fire, in the two-dimensional coordinate system of testing gas Wobbe index (Y-axis), combustion potential (X-axis), obtain new many groups and take off fiery state point.Should obtain at least 4～5 during test and take off fiery state point.
(10) according to the Wobbe index, the combustion potential combustibility index that take off fire test gas, same two-dimensional coordinate is fastened in the above, marks the corresponding fiery state coordinate point that takes off, and gets curve 3 continuously, is the fiery curve that takes off of test gas.
Fasten at the two-dimensional coordinate of setting up, according to yellow flame or rough burning, tempering, take off the fire three kinds of limiting conditions, choose and respectively test the closed region that curve 1,2,3 that gas Wobbe index, coordinate points that test gas firing gesture two combustibility indexes are corresponding form surrounds, consisted of the two-dimensional adaptation territory of gas utensil smooth combustion.
As Fig. 1, according to the fuel gases calorific value of reference gas, choose the fuel gases calorific value H of reference gas
0As the reference point of Z axis coordinate, it is H that the two-dimensional closed interval that obtains on X, Y-axis is projected to vertical coordinate
0The plane on, formed reference gas calorific value H
0The time the combustion gas adaptive domain.Select (0%～60%) H
0The wave zone between calorific value constant interval for allowing, H in figure
1Be H
0+ (0%～60%) H
0Coordinate points, H
2Be H
0-(0%～60%) H
0Coordinate points.Cross some H
1With H
2And with the perpendicular plane Z of z axis
1=H
1, Z
2=H
2, intersect with curved surface 1,2,3 regions the sealing solid zone that forms respectively, be exactly the three-dimensional adaptive domain of gas utensil smooth combustion.See Fig. 1 part that heavy line encloses.
In like manner, test gas calorific value and test gas Wobbe index respectively as X-axis and the Y-axis of coordinate system, during as the coordinate Z axis, also can be obtained a new combustion gas adaptive domain with all the other parameters such as test gas firing gesture or yellow flame indexes.What form on the two dimensional surface coordinate system at this moment, is that fuel gases calorific value and Wobbe index are the gas utensil adaptive domain of equivalency index.
Claims (1)
1. method for determining combustion adaptive domain of gas appliance is characterized in that: carry out according to the following step:
(1) according to the type of test gas utensil, select suitable reference gas; Calculate each corresponding combustibility index corresponding to this reference gas, according to the burning performance parameter of reference gas, determine that gas utensil is normal, the optimum condition point during steady operation;
(2) according to GB/T 13611 regulations, component and combustibility index with reference to the yellow flame under this reference gas classification or rough burning limit gas, prepare the test gas of yellow flame or rough burning limit gas, and limit gas component and the corresponding burning performance parameter of confirmed test gas when yellow flame or rough burning occur;
(3) adjust the component ratio of distribution unstripped gas, reduce gradually inert composition content or the slow gas composition of increase burning rate in the distribution unstripped gas, new distribution test pneumatic transmission is entered the gas utensil burning, until yellow flame or rough burning occur, obtain new many groups of yellow flames or rough burning boundary state point, should obtain at least 4～5 yellow flames or rough burning state point during test;
(4) according to the combustibility index of reference gas and yellow flame or rough burning boundary test gas, choose representative certain two or three combustibility indexes, set up two dimension or three-dimensional system of coordinate; The curve that the yellow flame that the combustibility index of these selections is corresponding or rough burning boundary state coordinate point are linked to be is yellow flame or the rough burning curve of testing gas;
(5) according to step (2), (3), (4), in the same coordinate system, take same method, the test gas tempering combustion curve when determining tempering and taking off fiery ultimate limit state, take off fiery combustion curve.When determining tempering curve, for obtaining tempering ultimate limit state point, can increase gradually fast gas composition or the slow gas composition of minimizing burning rate of burning rate in unstripped gas; When determining to take off fiery curve, for obtaining taking off fiery ultimate limit state point, can increase gradually inert composition or the fast gas composition of minimizing burning rate in unstripped gas;
The curve that coordinate points corresponding to the suitable combustibility index of choosing like this forms is three: the yellow flame of test gas or rough burning curve, test gas tempering combustion curve, take off fiery combustion curve; Article three, the closed region that surrounds of curve, with calorific value, C3 and above component concentration, relative density, fuel gas buring speed, yellow flame index, knot carbon index, above-mentioned different index is combined to form the closed region, has consisted of the adaptive domain of gas utensil smooth combustion or has adapted to body.
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| CN102353551B (en) * | 2011-06-27 | 2015-12-16 | 中国市政工程华北设计研究总院 | A kind of method and used test device measuring gas utensil makings adaptive domain or combustion conditions |
| CN105181370B (en) * | 2015-09-02 | 2019-09-10 | 中国市政工程华北设计研究总院有限公司 | Gas burner adaptive testing method |
| CN106439821A (en) * | 2016-08-29 | 2017-02-22 | 宁波方太厨具有限公司 | Civil combustor test device and combustor test method applying same |
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| JP2007100619A (en) * | 2005-10-05 | 2007-04-19 | Mitsubishi Motors Corp | Fuel injection control device of direct injection type internal combustion engine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07301424A (en) * | 1994-04-30 | 1995-11-14 | Sanyo Electric Co Ltd | Gas burning device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1560517A (en) * | 2004-02-26 | 2005-01-05 | 罗东晓 | Urban gas step replacing method |
| JP2007100619A (en) * | 2005-10-05 | 2007-04-19 | Mitsubishi Motors Corp | Fuel injection control device of direct injection type internal combustion engine |
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