CN104634922B - A kind of detachable solid fuel suspension combustion experiment proving installation and method of testing - Google Patents
A kind of detachable solid fuel suspension combustion experiment proving installation and method of testing Download PDFInfo
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Abstract
The invention discloses a kind of detachable solid fuel suspension combustion experiment proving installation and method of testing, belong to solid fuel ignition experimental technique field.Proving installation of the present invention comprises suspension combustion mechanism, burning data collecting mechanism, gas organization of supply and ignition mechanism.Base is placed on base support, single-stage combustion infratubal port is connected with pipe upper port in base and removably connects, secondary firing infratubal port is connected with single-stage combustion pipe upper port and removably connects, and in base, pipe upper port, single-stage combustion pipe upper port are respectively equipped with expanded metal.Method of testing of the present invention, the steps include: the placement of fuel; The suspension of fuel; Burning is carried out; Burning data gathers; Complete experiment.Main application of the present invention be achieve that fired state is visual, suspended state homogenous combustion, once combustion testing is carried out to several samples, function that bulky grain sample is easily lighted.
Description
Technical field
The invention belongs to solid fuel ignition experimental technique field, more particularly, relate to a kind of detachable solid fuel suspension combustion experiment proving installation and method of testing.
Background technology
At present, existing combustion experiment proving installation has many on the market, such as thermal analyzer, tubular furnace etc.But these combustion experiment proving installations have following shortcoming mostly: (1) visibility occlusions.Sample cell due to these burners is placed in the inside of instrument, therefore can only be analyzed by the combustion characteristics of some concrete numerical parameters to sample when testing, but cannot observe the fired state of sample intuitively; (2) burn uneven.In these apparatus, sample is many is placed in sample cell in stack, and remain static down and burn, although igniting and the burning of sample can be realized like this, but because sample is that the heating being subject to hot environment just ignition can occur, and sample heap outside contacts more abundant with hot environment, therefore the outside burning of sample heap is also more abundant, and the sample of inside is owing to being subject to the obstruction of external sample, combustion efficiency reduces; (3) sample unicity.Simple sample groove in apparatus determines each experiment can only carry out combustion testing to a kind of sample, and therefore carrying out test to different samples needs to carry out many experiments test.(4) bulky grain pressed powder is not easily lighted.Experiment test finds, the kindling point of powdered fuel improves along with the increase of solid particle, especially metal fuel, and when particle diameter reaches micron order, igniting is difficulty particularly.Therefore, realize " visual " of sample combustion, combustion efficiency " fully change ", burning sample " variation " and bulky grain sample and easily light and be extremely necessary, but, do not have a kind of combustion experiment proving installation meeting above-mentioned condition on the market at present.
Chinese Patent Application No. 200620132374.X, the applying date is on August 17th, 2006, invention and created name is: transparent vision glass combustion chamber of high pressure, this application case relates to a kind of high compression combustion chamber with transparent window, and it is made up of burning chamber shell, transparent window forms, transparent window forms gland, the firing chamber top cover with many binding posts, firing chamber top cover gland, gas inlet and outlet and powder column Frame lamp.This application case by the propellant flame that burn under high pressure is derived high compression combustion chamber, the movement of tracing flame and the burning rate of change detection propellant and Temperature Distribution.Sample in this application case needs to carry out heat treatment before combustion, is namely made into powder column.Although and for the ignition experiment of fuel can be realized the high-energy fuel with certain agglutination phenomenon, the high-energy fuel combustion phenomena of disperse state but cannot be studied, also cannot obtain the situation such as the burning rate of sample, flame pattern in addition.Further, once experiment is merely able to a kind of sample that burns, and cost drops into higher, and the tool that operates acquires a certain degree of difficulty.
Chinese Patent Application No. 200920250410.6, the applying date is on November 17th, 2009, invention and created name is: a kind of test unit for the combustion characteristics of studying coal powder under suspended state, this application case relates to a kind of test unit for the combustion characteristics of studying coal powder under suspended state, this test unit connects back taper cylinder downwards by right cylinder type tube, connect to form at reducing place of back taper cylinder and gas pipeline, in right cylinder type tube upper end, gas outlet also arranges inverted Y-shaped charge pipe, and this inverted Y-shaped charge pipe is deep into the middle part of right cylinder type tube, inverted Y-shaped charge pipe is made up of quartz.The advantage of this application case is simple structure, and coal dust extended residence time contributes to the formation of suspended state.The shortcoming of this application case is, coal dust enters right cylinder type tube by inverted Y-shaped charge pipe, and coal dust has just entered right cylinder type tube just to be needed to be in suspended state, is therefore not easy the gas flow controlling to enter right cylinder type tube, coal dust is easily directly blown away or is fallen in gas pipeline, and it is very inconvenient to operate.
Summary of the invention
1. invent the technical matters that will solve
The present invention is directed to that current combustion experiment test device cannot observe fired state, sample combustion weak effect, each experiment can only carry out to a kind of sample the shortcoming that combustion testing and bulky grain sample not easily light, provide a kind of detachable solid fuel suspension combustion experiment proving installation and method of testing, achieve that fired state is visual, suspended state homogenous combustion, once combustion testing is carried out to several samples, function that bulky grain sample is easily lighted.
2. technical scheme
For achieving the above object, technical scheme provided by the invention is:
One of the present invention detachable solid fuel suspension combustion experiment proving installation, comprises suspension combustion mechanism, burning data collecting mechanism, gas organization of supply and ignition mechanism;
Described suspension combustion mechanism comprises gas access, base, single-stage combustion pipe, expanded metal, gas vent, secondary firing pipe and base support; Described base is placed on base support, and described chassis interior is provided with pipe in base, and in described base, pipe is through hole; Described gas access is pipe, and gas access upper port is connected with non-corrodible steel conical pipe lower port, and non-corrodible steel conical pipe upper port is connected with infratubal port in base; Described single-stage combustion pipe is pipe, and single-stage combustion infratubal port is connected with pipe upper port in base and removably connects; Described secondary firing pipe is the pipe that upper port equals envelope, and secondary firing pipe upper side is provided with a pair gas vent, and described secondary firing infratubal port is connected with single-stage combustion pipe upper port and removably connects; In described base, pipe upper port, single-stage combustion pipe upper port are respectively equipped with expanded metal;
Described burning data collecting mechanism comprises thermometer hole, thermopair, data collecting instrument, computing machine and high-speed camera, and be provided with some to thermometer hole, thermometer hole equidistantly distributes in the height direction described single-stage combustion pipe, secondary firing pipe Side symmetrical; Insert thermopair respectively in described thermometer hole, the output terminal of thermopair is connected with the input end of data collecting instrument, and the output terminal of data collecting instrument is connected with computing machine; Described high-speed camera is just to single-stage combustion pipe, secondary firing pipe, and the output terminal of high-speed camera is connected with computing machine;
Described gas organization of supply comprises gas bomb, flowmeter controller and mass flowmeter, and described gas bomb outlet is connected with mass flowmeter entrance, and mass flowmeter outlet is connected with gas access lower port; Described mass flowmeter is also connected with flowmeter controller, and flowmeter controller is connected with computing machine;
Described ignition mechanism comprises lighter, ignition electrode and pressure regulator, and described output voltage regulator is connected with lighter input end, and lighter output terminal is connected with a pair ignition electrode respectively; Above-mentioned a pair ignition electrode inserts in two thermometer holes of single-stage combustion infratubal port symmetry respectively.
As a further improvement on the present invention, described single-stage combustion pipe, secondary firing pipe are made up of transparency silica glass.
As a further improvement on the present invention, described expanded metal is made up of foam metal.
As a further improvement on the present invention, described single-stage combustion pipe, secondary firing pipe are stepped pipe, this stepped pipe is made up of the pipe of upper and lower different inner diameters, the internal diameter of upper pipe is 18-22mm, be highly 10mm, the internal diameter of lower pipe is 14-18mm, is highly 60-80mm, and wherein the wall thickness of upper and lower pipe is 2-3mm.
As a further improvement on the present invention, described base is stainless steel round steel, and the external diameter of this stainless steel round steel is 40-50mm, is highly 60-100mm; In described base, pipe is stepped throughhole, and this stepped throughhole is made up of the through hole of upper and lower different pore size, and the aperture of upper through hole is 18-22mm, is highly 10mm, and the aperture of lower through-hole is 14-18mm.
As a further improvement on the present invention, described non-corrodible steel conical pipe upper port aperture is 15-20mm, and lower port aperture is 6-8mm; Described thermometer hole is circular port, and the aperture of thermometer hole is 2-3mm; Described gas vent is circular port, and the aperture of gas vent is 5-10mm, and gas vent is 5mm apart from the distance of secondary firing pipe upper port.
As a further improvement on the present invention, described base support is a channel-section steel, and the upper and lower leg middle part of this channel-section steel offers rectangular channel respectively, and described base is embedded on the rectangular channel of base support.
As a further improvement on the present invention, described base support height is 100 ~ 150mm, and wide is 80 ~ 120mm, and the width of described rectangular channel is 30 ~ 40mm.
As a further improvement on the present invention, described ignition electrode is right cylinder, and this cylindrical diameter is 2-3mm, and its end is tip-like.
One of the present invention detachable solid fuel suspension combustion experiment method of testing, the steps include:
The placement of step one, fuel:
Connect detachable solid fuel suspension combustion experiment proving installation, powdered solid fuel is put in respectively on the expanded metal of pipe upper port in base, single-stage combustion pipe upper port;
The suspension of step 2, fuel:
Open the valve on gas bomb, the gas flow entering gas access is set on computers, the powdered solid fuel on expanded metal is suspended;
Step 3, burning are carried out:
Turn-on data Acquisition Instrument and high-speed camera, then open pressure regulator, and the powdered solid fuel of pipe upper port suspended state in base is lighted in ignition electrode point discharge, in single-stage combustion pipe, produce combustion flame; Increase the gas flow entering gas access, the flame in single-stage combustion pipe is upwards propagated, lights the powdered solid fuel of single-stage combustion pipe upper port suspended state;
Step 4, burning data collection:
Pass to data collecting instrument by temperature data during thermopair collection pulverized solid fuel combustion, temperature data is transferred to computing machine by data collecting instrument, obtains the temperature data of not different point for measuring temperature in the same time on computers; In addition by high-speed camera, the fired state in single-stage combustion pipe, secondary firing pipe is monitored, captured image is stored;
Step 5, complete experiment:
The valve on gas bomb is closed in end to be combusted afterwards, closes data collecting instrument and high-speed camera, takes off single-stage combustion pipe, secondary firing pipe successively, collects the solid combustion residue fallen within expanded metal.
3. beneficial effect
Adopt technical scheme provided by the invention, compared with prior art, there is following remarkable result:
(1) one of the present invention detachable solid fuel suspension combustion experiment method of testing, the bulky grain solid fuel not easily lighted is placed in single-stage combustion pipe upper port, in base, pipe upper port places solid small particles fuel, solid small particles fuel is very easily lighted by ignition electrode, flame after lighting upwards is propagated with the air-flow risen, and goes as new incendiary source to light the bulky grain solid fuel placed in single-stage combustion pipe upper port; In solid fuel suspension combustion experiment process, although bulky grain solid fuel is not easily directly lighted, but flame temperature during solid small particles fuel combustion is enough to light bulky grain solid fuel, one of the present invention detachable solid fuel suspension combustion experiment method of testing, adopt the mode of single-stage combustion pipe, secondary firing pipe combined burning, solving the problem that bulky grain solid fuel is not easily lighted dexterously, providing new solution for lighting bulky grain solid fuel in combustion experiment.
(2) one of the present invention detachable solid fuel suspension combustion experiment proving installation, by regulating the gas flow entering gas access, make the solid fuel be placed on expanded metal be held up by the gas risen and be in the state of suspension, optimize solid-fuelled disperse state; The state burning that solid fuel is suspending, improves the homogeneity of solid fuel ignition, obviously improves solid-fuelled combustion efficiency, be conducive to studying solid-fuelled fired state better.
(3) one of the present invention detachable solid fuel suspension combustion experiment proving installation, two kinds of solid fuels can be positioned over respectively on the expanded metal of pipe upper port in base, single-stage combustion pipe upper port, realize the function of once two kinds of solid fuels being carried out to combustion experiment; Can between single-stage combustion pipe, secondary firing pipe, set up multiple flame tube and expanded metal is set on corresponding flame tube simultaneously, many kinds of solids fuel is positioned over respectively on different expanded metals and burns, so just can reach the function of once many kinds of solids fuel being carried out to combustion experiment.
(4) one of the present invention detachable solid fuel suspension combustion experiment proving installation, single-stage combustion pipe, secondary firing pipe are made by transparency silica glass, achieve the visual of fired state in single-stage combustion pipe, secondary firing pipe, can be observed easily by high-speed camera and record solid-fuelled fired state, and subsequent treatment and analysis are carried out to the image of shooting, be conducive to studying solid-fuelled fired state better.
(5) one of the present invention detachable solid fuel suspension combustion experiment proving installation, the expanded metal of single-stage combustion pipe upper port can be experimentally needed to remove, solid fuel is directly put on the expanded metal of pipe upper port in base, when solid fuel carries out suspension combustion experiment, add the space of solid fuel ignition; For different types of solid fuel, the size of combustion space can be regulated adaptably simultaneously, be conducive to the research of variety classes solid fuel ignition state.
(6) one of the present invention detachable solid fuel suspension combustion experiment proving installation, single-stage combustion pipe, secondary firing pipe are provided with thermometer hole, the temperature data of each thermometer hole is gathered by thermopair, to obtain on single-stage combustion pipe, secondary firing pipe the temperature data of not different point for measuring temperature in the same time, and compare on time and position with the burning image that high-speed camera is taken, be conducive to fired state and the combustion mechanism of furtheing investigate solid fuel suspension burning.
(7) one of the present invention detachable solid fuel suspension combustion experiment proving installation, reasonable in design, cost of manufacture are low, easily manufactured, are convenient to promote the use of.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of detachable solid fuel suspension combustion experiment proving installation of the present invention;
Fig. 2 is the structural representation that in the present invention, base is placed;
Fig. 3 is the structural representation of single-stage combustion pipe and secondary firing pipe in the present invention.
Label declaration in schematic diagram:
1, gas bomb; 2, flowmeter controller; 3, mass flowmeter; 4, gas access; 5, pipe in base; 6, base; 7, lighter; 8, ignition electrode; 9, single-stage combustion pipe; 10, expanded metal; 11, thermometer hole; 12, gas vent; 13, secondary firing pipe; 14, thermopair; 15, data collecting instrument; 16, computing machine; 17, high-speed camera; 18, pressure regulator; 19, base support.
Embodiment
For understanding content of the present invention further, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.
Embodiment 1
As shown in Figure 1, Figure 2 and Figure 3, the one detachable solid fuel suspension combustion experiment proving installation of the present embodiment, comprises suspension combustion mechanism, burning data collecting mechanism, gas organization of supply and ignition mechanism.
Suspension combustion mechanism comprises gas access 4, base 6, single-stage combustion pipe 9, expanded metal 10, gas vent 12, secondary firing pipe 13 and base support 19.Base 6 is stainless steel round steel, and the external diameter of this stainless steel round steel is 40mm, is highly 60mm.For the ease of the clamping of both hands to base 6, be provided with aduncate annular groove in base 6 middle part.Base support 19 is a channel-section steel, and the upper and lower leg middle part of this channel-section steel offers rectangular channel respectively, and base support 19 is highly 100mm, and wide is 80mm, and the width of rectangular channel is 30mm.Base 6 is embedded on the rectangular channel of base support 19.Base 6 inside is provided with pipe 5 in base, and in base, pipe 5 is stepped throughhole, and this stepped throughhole is made up of the through hole of upper and lower different pore size, and the aperture of upper through hole is 18mm, is highly 10mm, and the aperture of lower through-hole is 15mm.Gas access 4 is pipe, gas access 4 upper port welds together with non-corrodible steel conical pipe lower port and communicates, non-corrodible steel conical pipe upper port welds together with pipe in base 5 lower port and communicates, and non-corrodible steel conical pipe upper port aperture is 15mm, and lower port aperture is 6mm.
As shown in Figure 3, (a) in Fig. 3 is single-stage combustion pipe 9 structural representation, and (b) in Fig. 3 is secondary firing pipe 13 structural representation.Single-stage combustion pipe 9 is stepped pipe, and single-stage combustion pipe 9 is made up of the pipe of upper and lower different inner diameters, and the internal diameter of upper pipe is 20mm, is highly 10mm, and the internal diameter of lower pipe is 18mm, and be highly 60mm, wherein the wall thickness of upper and lower pipe is 2mm.Single-stage combustion pipe 9 lower port is connected with pipe in base 5 upper port and is threaded.Secondary firing pipe 13 puts down the stepped pipe of envelope for upper port, and secondary firing pipe 13 is made up of the pipe of upper and lower different inner diameters, and the internal diameter of upper pipe is 20mm, be highly 10mm, the internal diameter of lower pipe is 18mm, is highly 60mm, and wherein the wall thickness of upper and lower pipe is 2mm.Secondary firing pipe 13 upper side is provided with a pair gas vent 12, and gas vent 12 is circular port, and the aperture of gas vent 12 is 5mm, and gas vent 12 is 5mm apart from the distance of secondary firing pipe 13 upper port.Secondary firing pipe 13 lower port is connected with single-stage combustion pipe 9 upper port and is threaded.Single-stage combustion pipe 9, secondary firing pipe 13 are made up of transparency silica glass, therefore can pass through single-stage combustion pipe 9, secondary firing pipe 13 pairs of burned flames carry out observed and recorded.In base, pipe 5 upper port, single-stage combustion pipe 9 upper port are respectively equipped with expanded metal 10, the thin plate that expanded metal 10 makes for foam metal, and foam metal is the porous metals with some strength and rigidity, and foam metal can adopt nickel foam, foamed aluminium etc.
Burning data collecting mechanism comprises thermometer hole 11, thermopair 14, data collecting instrument 15, computing machine 16 and high-speed camera 17, being provided with of single-stage combustion pipe 9, secondary firing pipe 13 Side symmetrical is some to thermometer hole 11, thermometer hole 11 equidistantly distributes in the height direction, thermometer hole 11 is circular port, and the aperture of thermometer hole 11 is 2mm.Thermopair 14 is standard K type thermopair, and length is adjustable according to experiment.Thermopair 14 is inserted respectively in thermometer hole 11, the output terminal of thermopair 14 is connected with the input end of data collecting instrument 15, the output terminal of data collecting instrument 15 is connected with computing machine 16, data collecting instrument 15 adopts multichannel data acquisition system, can be connected with computing machine 16, the temperature data that thermopair 14 records is transferred to computing machine 16 by data collecting instrument 15, the temperature at each thermometer hole 11 place when therefore can obtain burning on computing machine 16.High-speed camera 17 is just to single-stage combustion pipe 9, secondary firing pipe 13, and high-speed camera 17 can be taken the combustion flame in single-stage combustion pipe 9, secondary firing pipe 13.The output terminal of high-speed camera 17 is connected with computing machine 16, carries out storing and process to captured image by computing machine 16.High-speed camera 17 will meet writing speed more than 1000 frames per second.Computing machine 16 adopts standard configuration, and what data collecting instrument 15 and high-speed camera 17 were housed supports the use software.
Gas organization of supply comprises gas bomb 1, flowmeter controller 2 and mass flowmeter 3, and gas bomb 1 is standard steel cylinder, and internal gas can experimentally need to change.Gas bomb 1 outlet is connected with mass flowmeter 3 entrance, and mass flowmeter 3 outlet is connected with gas access 4 lower port.Mass flowmeter 3 is connected with flowmeter controller 2, and flowmeter controller 2 is connected with computing machine 16.Gas in gas bomb 1 enters gas access 4 by mass flowmeter 3, and mass flowmeter 3 gas that can control in gas bomb 1 enters the gas flow of gas access 4.Flow quantity control instrument 2 controls by Mass Control flowmeter 3 gas flow entering gas access 4, because flowmeter controller 2 is connected with computing machine 16, therefore the parameter entering gas access 4 gas flow can be directly set at computing machine 16, reach the control to the gas flow entering gas access 4.
Ignition mechanism comprises lighter 7, ignition electrode 8 and pressure regulator 18, and lighter 7 is high-energy igniter, and pressure regulator 18 input end is 220V alternating current, and 220V AC conversion can be the direct current of 0-250V by pressure regulator 18.Pressure regulator 18 output terminal is connected with lighter 7 input end, and lighter 7 output terminal is connected with a pair ignition electrode 8 respectively, and ignition electrode 8 is right cylinder heat-resisting steel structure, and this cylindrical diameter is 2mm, and its end is tip-like, makes it easily produce point discharge.Above-mentioned a pair ignition electrode 8 inserts in two thermometer holes 11 of single-stage combustion pipe 9 lower port symmetry respectively, and a pair ignition electrode 8 is discharged by the end of its tip-like, and ionization surrounding air produces electric spark, release amount of heat.
The one detachable solid fuel suspension combustion experiment proving installation of the present embodiment, the expanded metal 10 of single-stage combustion pipe 9 upper port can be experimentally needed to remove, solid fuel is directly put on the expanded metal 10 of pipe 5 upper port in base, when solid fuel carries out suspension combustion experiment, increase the space of solid fuel ignition.
The one detachable solid fuel suspension combustion experiment proving installation of the present embodiment, multiple flame tube can be set up between single-stage combustion pipe 9, secondary firing pipe 13, be still between multiple flame tube and removably connect, the upper port of multiple flame tube is respectively equipped with expanded metal 10, dissimilar solid fuel can be positioned on different expanded metals 10 respectively, above-mentioned setting can reach the function of once many kinds of solids fuel being carried out to suspension combustion experiment.
The one detachable solid fuel suspension combustion experiment method of testing of the present embodiment, the steps include:
The placement of step one, fuel:
Connect the detachable solid fuel suspension combustion experiment proving installation of the present embodiment, the utility appliance such as gas pipeline, thermopair 14 and high-speed camera 17 are all ready to.Taking certain mass particle diameter is that the aluminium powder of 50nm is positioned on the expanded metal 10 of pipe 5 upper port in base, install single-stage combustion pipe 9 additional, be that the aluminium powder of 100nm is positioned on the expanded metal 10 of single-stage combustion pipe 9 upper port by certain mass particle diameter, install secondary firing pipe 13 additional;
The suspension of step 2, fuel:
Open the valve on gas bomb 1, computing machine 16 arranges the gas flow entering gas access 4, gas from gas entrance 4 in gas bomb 1 enters pipe 5 in base, discharged by gas vent 12, the rising of gas makes particle diameter on expanded metal 10 be the aluminium powder of 50nm and particle diameter to be the aluminium powder of 100nm all to suspend;
Step 3, burning are carried out:
Turn-on data Acquisition Instrument 15 and high-speed camera 17, then open pressure regulator 18, the particle diameter that in base, the suspension of pipe 5 upper port is got up is the aluminium powder of 50nm, under ignition electrode 8 point discharge, because the heating of high-temperature electric spark is lighted, in single-stage combustion pipe 9, produce combustion flame; Slow increase enters the gas flow of gas access 4, single-stage combustion pipe 9 Flame is upwards propagated, the amount of heat of releasing during the burning of single-stage combustion pipe 9 Flame passes to single-stage combustion pipe 9 upper port and is in the aluminium powder that suspended state particle diameter is 100nm, and the aluminium powder being 100nm by this amount particle diameter is lighted;
Step 4, burning data collection:
The temperature data gathered when aluminium powder burns by thermopair 14 is transferred to data collecting instrument 15, and simulating signal is converted to digital data transmission to computing machine 16 by data collecting instrument 15, and computing machine 16 obtains the temperature data of not different point for measuring temperature in the same time; In addition monitored by the fired state in high-speed camera 17 pairs of single-stage combustion pipes 9, secondary firing pipe 13, captured image is stored and successive image process;
Step 5, complete experiment:
The valve on gas bomb 1 is closed in end to be combusted afterwards, closes data collecting instrument 15 and high-speed camera 17, takes off single-stage combustion pipe 9, secondary firing pipe 13 successively, collects the solid combustion residue falling within expanded metal 10.
Embodiment 2
The one detachable solid fuel suspension combustion experiment proving installation of the present embodiment, its basic structure is identical with embodiment 1, and its difference is, the external diameter of base 6 is 50mm, is highly 100mm; Base support 19 is highly 150mm, and wide is 120mm, and on base support 19, the width of rectangular channel is 40mm; The aperture of gas vent 12 is 10mm; The aperture of thermometer hole 11 is 3mm.
Embodiment 3
The one detachable solid fuel suspension combustion experiment proving installation of the present embodiment, its basic structure is identical with embodiment 1, and its difference is, the external diameter of base 6 is 45mm, is highly 80mm; Base support 19 is highly 125mm, and wide is 100mm, and on base support 19, the width of rectangular channel is 25mm; The aperture of gas vent 12 is 8mm.
Schematically above be described the present invention and embodiment thereof, this description does not have restricted, and also just one of the embodiments of the present invention shown in accompanying drawing, actual structure is not limited thereto.So, if those of ordinary skill in the art enlightens by it, when not departing from the invention aim, designing the frame mode similar to this technical scheme and embodiment without creationary, all should protection scope of the present invention be belonged to.
Claims (10)
1. a detachable solid fuel suspension combustion experiment proving installation, is characterized in that, comprises suspension combustion mechanism, burning data collecting mechanism, gas organization of supply and ignition mechanism;
Described suspension combustion mechanism comprises gas access (4), base (6), single-stage combustion pipe (9), expanded metal (10), gas vent (12), secondary firing pipe (13) and base support (19); Described base (6) is placed on base support (19), and described base (6) inside is provided with pipe (5) in base, and in described base, pipe (5) is through hole; Described gas access (4) is pipe, and gas access (4) upper port is connected with non-corrodible steel conical pipe lower port, manages (5) lower port and be connected in non-corrodible steel conical pipe upper port and base; Described single-stage combustion pipe (9) is pipe, manages (5) upper port and be connected and removably connect in single-stage combustion pipe (9) lower port and base; Described secondary firing pipe (13) puts down the pipe of envelope for upper port, secondary firing pipe (13) upper side is provided with a pair gas vent (12), and described secondary firing pipe (13) lower port is connected with single-stage combustion pipe (9) upper port and removably connects; In described base, pipe (5) upper port, single-stage combustion pipe (9) upper port are respectively equipped with expanded metal (10);
Described burning data collecting mechanism comprises thermometer hole (11), thermopair (14), data collecting instrument (15), computing machine (16) and high-speed camera (17), be provided with some to thermometer hole (11), thermometer hole (11) equidistantly distributes in the height direction described single-stage combustion pipe (9), secondary firing pipe (13) Side symmetrical; Thermopair (14) is inserted respectively in described thermometer hole (11), the output terminal of thermopair (14) is connected with the input end of data collecting instrument (15), and the output terminal of data collecting instrument (15) is connected with computing machine (16); Described high-speed camera (17) is just to single-stage combustion pipe (9), secondary firing pipe (13), and the output terminal of high-speed camera (17) is connected with computing machine (16);
Described gas organization of supply comprises gas bomb (1), flowmeter controller (2) and mass flowmeter (3), described gas bomb (1) outlet is connected with mass flowmeter (3) entrance, and mass flowmeter (3) outlet is connected with gas access (4) lower port; Described mass flowmeter (3) is also connected with flowmeter controller (2), and flowmeter controller (2) is connected with computing machine (16);
Described ignition mechanism comprises lighter (7), ignition electrode (8) and pressure regulator (18), described pressure regulator (18) output terminal is connected with lighter (7) input end, and lighter (7) output terminal is connected with a pair ignition electrode (8) respectively; Above-mentioned a pair ignition electrode (8) is inserted in two thermometer holes (11) of single-stage combustion pipe (9) lower port symmetry respectively.
2. one according to claim 1 detachable solid fuel suspension combustion experiment proving installation, is characterized in that, described single-stage combustion pipe (9), secondary firing pipe (13) are made up of transparency silica glass.
3. one according to claim 1 detachable solid fuel suspension combustion experiment proving installation, is characterized in that, described expanded metal (10) is made up of foam metal.
4. one according to claim 1 detachable solid fuel suspension combustion experiment proving installation, it is characterized in that, described single-stage combustion pipe (9), secondary firing pipe (13) are stepped pipe, this stepped pipe is made up of the pipe of upper and lower different inner diameters, the internal diameter of upper pipe is 18-22mm, is highly 10mm, and the internal diameter of lower pipe is 14-18mm, be highly 60-80mm, wherein the wall thickness of upper and lower pipe is 2-3mm.
5. one according to claim 1 detachable solid fuel suspension combustion experiment proving installation, is characterized in that, described base (6) is stainless steel round steel, and the external diameter of this stainless steel round steel is 40-50mm, is highly 60-100mm; In described base, pipe (5) is stepped throughhole, and this stepped throughhole is made up of the through hole of upper and lower different pore size, and the aperture of upper through hole is 18-22mm, is highly 10mm, and the aperture of lower through-hole is 14-18mm.
6. one according to claim 1 detachable solid fuel suspension combustion experiment proving installation, is characterized in that, described non-corrodible steel conical pipe upper port aperture is 15-20mm, and lower port aperture is 6-8mm; Described thermometer hole (11) is circular port, and the aperture of thermometer hole (11) is 2-3mm; Described gas vent (12) is circular port, and the aperture of gas vent (12) is 5-10mm, and gas vent (12) is 5mm apart from the distance of secondary firing pipe (13) upper port.
7. one according to claim 1 detachable solid fuel suspension combustion experiment proving installation, it is characterized in that, described base support (19) is a channel-section steel, the upper and lower leg middle part of this channel-section steel offers rectangular channel respectively, and described base (6) is embedded on the rectangular channel of base support (19).
8. one according to claim 7 detachable solid fuel suspension combustion experiment proving installation, it is characterized in that, described base support (19) is highly 100 ~ 150mm, and wide is 80 ~ 120mm, and the width of described rectangular channel is 30 ~ 40mm.
9. one according to claim 2 detachable solid fuel suspension combustion experiment proving installation, is characterized in that, described ignition electrode (8) is right cylinder, and this cylindrical diameter is 2-3mm, and its end is tip-like.
10. the detachable solid fuel suspension combustion experiment method of testing utilizing detachable solid fuel suspension combustion experiment proving installation as claimed in any one of claims 1 to 9 wherein to carry out, is characterized in that, the steps include:
The placement of step one, fuel:
Connect detachable solid fuel suspension combustion experiment proving installation, powdered solid fuel is put in respectively on the expanded metal (10) of pipe (5) upper port, single-stage combustion pipe (9) upper port in base;
The suspension of step 2, fuel:
Open the valve on gas bomb (1), enter the gas flow of gas access (4) in the upper setting of computing machine (16), the powdered solid fuel on expanded metal (10) is suspended;
Step 3, burning are carried out:
Turn-on data Acquisition Instrument (15) and high-speed camera (17), then pressure regulator (18) is opened, the powdered solid fuel of pipe (5) upper port suspended state in base is lighted in ignition electrode (8) point discharge, in single-stage combustion pipe (9), produce combustion flame; Increase the gas flow entering gas access (4), the flame in single-stage combustion pipe (9) is upwards propagated, lights the powdered solid fuel of single-stage combustion pipe (9) upper port suspended state;
Step 4, burning data collection:
Data collecting instrument (15) is passed to by temperature data during thermopair (14) collection pulverized solid fuel combustion, temperature data is transferred to computing machine (16) by data collecting instrument (15), and computing machine (16) obtains the temperature data of not different point for measuring temperature in the same time; In addition by high-speed camera (17), the fired state in single-stage combustion pipe (9), secondary firing pipe (13) is monitored, captured image is stored;
Step 5, complete experiment:
The valve on gas bomb (1) is closed in end to be combusted afterwards, close data collecting instrument (15) and high-speed camera (17), take off single-stage combustion pipe (9), secondary firing pipe (13) successively, collect the solid combustion residue fallen within expanded metal (10).
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| CN111751486B (en) * | 2020-06-28 | 2021-09-21 | 西北工业大学 | Diagnosis method and device for ignition combustion process and details of metal particles along with flow |
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