CN210514213U - Gas-solid mixture fire injection device - Google Patents
Gas-solid mixture fire injection device Download PDFInfo
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- CN210514213U CN210514213U CN201921306151.4U CN201921306151U CN210514213U CN 210514213 U CN210514213 U CN 210514213U CN 201921306151 U CN201921306151 U CN 201921306151U CN 210514213 U CN210514213 U CN 210514213U
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Abstract
The gas-solid mixture fire injection device comprises a combustible gas cylinder, a pressure reducing valve, a metal hose, an adapter, a stainless steel pipe, a gas flow controller and a fire arrester which are connected in sequence, wherein the lower part of a combustor is connected with the fire arrester through a gas transmission metal hose after penetrating through a feeder; the top end of the burner is provided with an igniter; the electronic balance is provided with a supporting device for fixing the feeder, and the upper part of the burner is sleeved with a sand collecting and weighing device. The utility model utilizes the Venturi effect to automatically suck the sand accumulated on the side opening of the burner and spray the sand together with the gas, the suction amount of the sand can be controlled by the flow rate of the gaseous fuel, the aperture size, the area of the side opening of the burner and the accumulation height of the sand in the feeder, and the accumulation height of the sand in the feeder is supplemented and controlled by the conveyor belt, so that a continuous and stable gas-solid mixture can be formed to spray and flow; the size of the pipe wall opening can be adjusted according to the specific size of the burner, and the gas-solid jet burner is suitable for gas-solid jet experiments of solid particles with different magnitude sizes such as micron and millimeter.
Description
Technical Field
The utility model belongs to natural gas long distance pipeline safe operation field, concretely relates to gas-solid mixture sprays fiery device.
Background
The jet fire is also called high-speed jet diffusion flame, such as jet flame caused by leakage of a chemical storage tank, combustion flame of a torch system for treating waste gas and jet combustion caused by breakage and leakage of a gas pipeline, and heat radiation generated by the jet fire causes great threat to surrounding personnel and buildings. When a buried natural gas pipeline passes through a desertification area, a forest land or in the oil and gas exploitation process, the phenomenon of carrying a large amount of sand dust is often accompanied by the jet fire induced by leakage in the propagation, the heat radiation of the flame at the moment is the outward radiation of combustion products of gaseous fuel and the sand dust, and the sand dust can influence the combustion characteristics of the jet flame, such as the form, the temperature, the speed and the like.
The existing pilot fire experimental device only considers the jet flow of the gaseous fuel, for example, chinese patent CN109682924A discloses a test device for forming the pilot fire by the leakage ignition of a high-pressure gas pipeline, which studies the combustion dynamics process of the pilot fire formed by the ignition of the gaseous fuel through an air source system, a burner, a data acquisition system and a flame characteristic characterization and expansion module, but the device can only study the gaseous pilot fire without considering the condition that the sand and dust are carried into the flame, so the experiment of the gas-solid mixture pilot fire cannot be performed on the experimental device.
At present, the research on the combustion phenomenon of gas-solid mixture mainly relates to the coal dust gas explosion in coal mining and the flame propagation and explosion in the combustion process of dust cloud. The gas-solid two-phase generating devices built by the people all aim at gas-solid premixed flame, and like the device for continuously burning dust cloud in an open space designed by the former people according to the spiral feeding principle, the burning medium is zirconium powder and air, belongs to the gas-solid premixed flame, and is not suitable for diffusion jet flame.
The feeding mode of the existing gas-solid injection device can be divided into an active mode and a passive mode. An active spiral vibrating feeder (refer to experimental research on characteristics of King autumn red zirconium powder cloud transient flame and continuous jet flame [ D ]. Chinese university of science and technology, 2012) mainly comprises an A-01 motor reducer, an A-02 feeding bin and an A-03 spiral, particles generate relative displacement under the action of gravity and external spiral thrust to feed, and the specific structure is shown in figure 1; an active gas-solid injection feeder (refer to Shuwei, coal powder particle group jet ignition characteristic experimental study [ D ]. Qinghua university.2013) mainly comprises an A-04 motor base, an A-05 stepping motor and an A-06 injector, wherein solid particles are placed in the injector and are pushed by the stepping motor to feed, and the specific structure is shown in figure 2. In the two active feeding devices, solid particles are required to be mixed with a gas-solid mixture in a mixing cavity through airflow, and the solid is carried out of the combustor through secondary airflow, so that the continuous feeding amount of the devices cannot be accurately controlled, the repeatability of experimental tests is poor, and the economic cost is high if precision is required. The passive fluidized feeder, which mainly consists of an A-07 feeding pipe, an A-08 fine powder pipe and an A-09 air supply pipe, the feeding amount is mainly adjusted by changing the height of the feeding pipe and the air flow rate, the structure is shown in figure 3, and obviously, the device can not form a lasting and continuous gas-solid mixture jet fire.
Disclosure of Invention
To above-mentioned current injection fire experimental apparatus can only study the injection fire that gaseous fuel formed, and the gas-solid sprays thing and produces the device and have shortcomings such as discontinuity, test repeatability difference, the utility model provides a gas-solid mixture injection fire device can realize that continuous gas-solid mixture sprays and flows for research desertification area buries ground natural gas pipeline and leaks and spray fire combustion characteristic and thermal disaster under the condition of sand smuggleing secretly.
A gas-solid mixture sprays fire device, the technical scheme of its adoption is: comprises a gas-solid mixture jet fire simulation device, a sand collecting and weighing device, a transmission device, a supporting device, a gas alarm, an electronic balance and a computer;
the gas-solid mixture jet fire simulation device comprises a combustible gas cylinder, a pressure reducing valve, a metal hose, an adapter, a stainless steel pipe, a gas mass flow controller, a flame arrester, a burner, a feeder and an igniter;
the outlet end of the combustible gas cylinder is provided with a pressure reducing valve which is connected with the gas inlet end of the stainless steel pipe through a metal hose and an adapter; the middle section of the stainless steel pipe is provided with a gas mass flow controller, and the tail end of the stainless steel pipe is provided with a flame arrester;
the lower part of the burner vertically penetrates through the feeder and is connected with the flame arrester through a gas transmission metal hose;
a conveying device for conveying sand is arranged at an inlet at the upper end of the feeder;
the top end of the combustor is provided with an igniter;
the supporting device is arranged below the feeder and positioned on the electronic balance, and the upper part of the combustor is sleeved with the sand collecting and weighing device;
a gas alarm for detecting the air tightness is also arranged at the outlet of the combustible gas bottle;
the gas mass flow controller, the electronic balance and the sand collecting and weighing device are respectively connected with a computer through data lines.
The feeder is fed continuously through the conveying device, so that the sand accumulation height in the feeder is kept relatively stable, and the influence of the change of the sand accumulation amount in the feeder on the sand entrainment speed is reduced. The feeder is replenished with sand, and the continuity of gas-solid jet flow is also ensured.
Further, the combustor is vertical tubular structure, and it includes combustor main part, external screw thread pipe and orifice plate, the lower extreme of combustor main part is connected with external screw thread pipe, gas transmission metal collapsible tube with external screw thread pipe threaded connection, the orifice plate is established at the inside hypomere of combustor main part and perpendicular rather than the axis, the centre bore has been seted up at the orifice plate center, set up more than three pipe wall mouth around its central axis on the pipe wall of the combustor main part of orifice plate top.
Further, the length of the burner is L, the inner diameter is D, and the outer diameter is D1The distance from the bottom of the pore plate to the top end of the burner main body is
The distance from the top end of the pore plate to the top of the pipe wall opening is D, and the thickness of the pore plate and the diameter of the central hole of the pore plate are D
The opening of the rectangular pipe wall is as long as
Further, the feeder is frustum funnel-shaped structure, and its bottom is the level form, and the tip has been seted up at feeder bottom center, the vertical downwardly extending of tip has a connecting portion, the combustor passes the tip of below from feeder upper portion and makes the centre bore bottom of orifice plate flushes with the bottom of feeder, is equipped with penetrating screw hole on the lateral wall of connecting portion, withstands the pipe wall of combustor main part through the bolt bottom with screw hole threaded connection to make the tip compress tightly the combustor or separate with the combustor.
Further, the height of the feeder is 6D1The upper inlet diameter is 10D1Bottom diameter of 3D1Diameter of discharge spout D1。
Further, strutting arrangement includes horizontal pole, flexible vertical pole, reinforcement disc, the feeder bilateral symmetry has set firmly the horizontal pole, two flexible vertical poles of adjustable length are installed to the symmetry on the reinforcement disc, and two horizontal poles correspond with two flexible vertical poles through the bolt respectively and are connected fixedly.
Furthermore, the sand collecting and weighing device comprises a tray, a vertical support and a pressure sensor, the tray is sleeved on the upper portion of the combustor and is in contact with the outer wall of the combustor in a gap-free mode, the tray is supported by a telescopic rod support with the length adjustable below the tray, the pressure sensor is installed at the bottom of the telescopic rod support, and the pressure sensor is connected with a computer.
The experimental procedure using the above apparatus was:
1) filling the feeder with sand;
2) turning on a gas alarm to detect the gas tightness of the device, and adjusting a gas mass flow controller;
3) opening the pressure reducing valve of the combustible gas bottle to make the combustible gas flow through the device pipeline and be sprayed out from the top of the burner, and immediately igniting the top of the burner by an igniter when the gas mass flow controller is stable.
The utility model discloses based on the venturi principle, an utilize gaseous fuel to flow through the convergent section and form high velocity air, make solid particle follow combustor side opening under "negative pressure" and roll up the suction air current automatically, and the accessible changes gaseous fuel flow, the aperture size, the control to sand feed rate is highly realized to the interior sand pile of combustor side opening area and feeder, carry out continuous feed through the conveyer belt simultaneously, finally realize that continuous gas-solid mixture sprays and flows, it is lighted and is gas-solid mixture sprays the fire promptly.
Compare with current injection fire experimental apparatus and gas-solid injection production device, the beneficial effects of the utility model are that:
firstly, the burning characteristics of the gas-solid mixture injection fire can be researched;
secondly, the gas-solid injection generating device generates a Venturi effect by utilizing a pore plate inside the combustor, the sand accumulated on the side port of the combustor is automatically sucked by the negative pressure generated by the Venturi effect and is sprayed out together with gas, the feeding quantity of the sand can be controlled by the size of the pore plate, the area of the side port (namely a pipe wall port) of the combustor and the sand accumulation height in the feeder, the device is simple, convenient and low in cost, the material is supplemented to the feeder by using a conveying device to control the sand accumulation height, and continuous and stable gas-solid mixture injection flow can be formed;
and the size of the side opening of the burner can be adjusted according to the specific size of the burner, and the gas-solid jet burner is suitable for gas-solid jet experiments of solid particles with different magnitudes such as microns and millimeters.
Drawings
In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is provided in connection with the accompanying drawings.
FIG. 1 is a schematic structural diagram of an active screw vibration feeder;
FIG. 2 is a schematic structural diagram of an active gas-solid injection type feeder;
FIG. 3 is a schematic view of a passive fluidized feeder configuration;
FIG. 4 is a schematic view of the structure of the present invention;
FIG. 5 is a schematic view of the structure of the burner;
FIG. 6 is a schematic view of the feeder sand feed configuration;
FIG. 7 is a diagram showing the effect of the gas-solid mixture on the fire.
The device comprises an A-01 motor reducer, an A-02 feeding bin, an A-03 spiral, an A-04 motor base, an A-05 stepping motor, an A-06 injector, an A-07 feeding pipe, an A-08 fine powder pipe and an A-09 air supply pipe, wherein the A-01 motor reducer is connected with the A-04 motor base through a screw;
1-gas-solid mixture injection fire simulation device, 101-combustible gas cylinder, 102-pressure reducing valve, 103-metal hose, 104-stainless steel pipe, 105-gas mass flow controller, 106-flame arrester, 107-burner, 1071-burner body, 1072-external thread pipe, 1073-orifice plate, 1074-pipe wall opening, 108-feeder, 1081 connecting part, 1082-sand, 1083-bolt, 109-igniter, 110-gas transmission metal hose, 111-adapter, 2-sand collection weighing device, 21-tray, 22-telescopic rod support, 23-pressure sensor, 3-transmission device, 4-support device, 41-cross rod, 42-telescopic vertical rod, 43-reinforced disc, 5-electronic balance, 6-computer, 7-gas alarm.
Detailed Description
As shown in fig. 4, a gas-solid mixture fire-spraying structure device comprises a gas-solid mixture fire-spraying simulation device 1, a sand collecting and weighing device 2, a conveying device 3, a supporting device 4, an electronic balance 5, a computer 6 and a gas alarm 7; the gas-solid mixture flame injection simulation device 1 comprises a combustible gas cylinder 101, a pressure reducing valve 102, a metal hose 103, a stainless steel pipe 104, a gas mass flow controller 105, a flame arrester 106, a burner 107, a feeder 108 and an igniter 109, wherein the pressure reducing valve 102 is arranged at an outlet of the combustible gas cylinder 101, one end of the metal hose 103 is connected with the pressure reducing valve 102, the other end of the metal hose is connected with a gas inlet end of the stainless steel pipe 104 through an adapter, the gas mass flow controller 105 is installed in the middle section of the stainless steel pipe 104, and the flame arrester 106 is installed at the tail end of the; the lower part of the burner 107 vertically penetrates through the feeder 108 and is connected with a flame arrester 106 through a gas transmission metal hose 110; an igniter 109 is arranged at the top end of the burner 107; a conveying device 3 for conveying sand is arranged at an inlet at the upper end of the feeder; a supporting device 4 for fixedly supporting the feeder 108 is installed below the feeder 108, the supporting device 4 comprises a cross rod 41, telescopic vertical rods 42 and a reinforcing disc 43, the cross rods 41 are arranged at the symmetrical ends of the two sides of the feeder 108, the two cross rods are preferably welded with the feeder in a connecting mode and are respectively and correspondingly connected with the two telescopic vertical rods 42 below the cross rods through bolts, the lower parts of the two telescopic vertical rods are fixed on the reinforcing disc 43, the influence of the shaking of the feeder on an experimental result in the experimental process can be prevented, the whole supporting device 4 is placed on an electronic balance 5 for weighing, and a sand collecting and weighing device 2 is sleeved at the upper part of a combustor 107; the gas mass flow control 105, the electronic balance 5 and the sand collecting and weighing device 2 are respectively connected with a computer 6 through data lines; and a gas alarm 7 for detecting the air tightness is also arranged at the outlet of the combustible gas cylinder.
In the embodiment, the combustible gas cylinder is filled with 30kg of standard high-purity (more than 99.9%) propane, and the pressure reducing valve is connected with the gas cylinder to keep the stable pressure of the gas in use. The middle section of the stainless steel pipe is provided with a gas mass flow controller for regulating the gas flow and accurately measuring the gas volume flow, the pressure and the temperature in the pipeline. The flame arrester adopted in the embodiment is a ferrule type flame arrester which is arranged at the tail end of the stainless steel pipe and can prevent backfire from spreading in the pipeline; the igniter is an electronic pulse ignition gun which can generate continuous electric sparks, and the length of the ignition gun is adjustable and can be bent, so that the ignition safety is ensured; the electronic balance is QuinTIXQ5102, the maximum load is 5Kg, and the precision is 0.01 g. And recording a data point every second, putting the fully loaded feeder, the combustor and the support frame on an electronic balance together, and measuring the real-time data value of the residual mass of the sand in the funnel after the experiment begins.
The conveying device adopted in the embodiment is a linear feeder in the prior art and is placed on a workbench, the linear feeder mainly comprises a linear rail, an electromagnet, a spring piece and a controller, the principle is that the electromagnet is connected with 220v alternating current to vibrate the electromagnet, and the electromagnet drives the linear rail to move through the spring piece, so that the purpose of linear feeding is achieved. The controller of the feeder is started, and the frequency can realize the speed and the stable transmission of the direct vibration device by adjusting half wave, full wave or voltage. The tail end of the linear track is arranged right above the center of the feeder, manual feeding is carried out from the other end of the feeder track, the transmission speed and the manual feeding speed can be optimally matched through debugging, so that the sand accumulation height in the feeder is kept relatively stable, and the influence of the change of the sand accumulation amount in the feeder on the sand suction speed is reduced. The feeder is replenished with sand, and the continuity of gas-solid jet flow is also ensured. Other structures of conveying devices can be adopted as long as the purpose of conveying the sand can be achieved. In different experiments, coal powder, metal dust, flour and the like can be used for replacing sand.
As shown in fig. 5, the burner 107 is preferably a vertical tubular structure including a burner body 1071, an externally threaded pipe 1072 and an orifice plate 1073, and preferably, the burner body 1071 is integrally formed with the externally threaded pipe 1072 at a lower end thereof to be seamlessly connected to the gas transmission metal hose 111 through the externally threaded pipe; the orifice plate 1073 is arranged inside the burner main body 1071 and positioned at the lower section thereof, a central hole is arranged at the center of the orifice plate 1073, and the orifice plate is vertical to the central axis of the burner main body; at least three pipe wall openings 1074 are symmetrically formed on the pipe wall of the burner main body 1071 above the orifice plate around the central axis thereof.
Preferably, the burner 107 has a length L, an inner diameter D and an outer diameter D1(ii) a The distance from the bottom of the pore plate to the top end of the burner main body is
The distance from the bottom end of the orifice plate 1073 to the top of the pipe wall port 1074 is D, and the thickness of the orifice plate and the diameter of the central hole of the orifice plate are both D for reducing the resistance brought by the thickness of the orifice plate
The length of the tube wall opening is
The width of the tube wall opening is determined by the inner diameter D of the burner and the number of the tube wall openings; and under the negative pressure generated when the high-speed airflow passes through the center of the orifice plate, the accumulated solid particles are automatically sucked into the high-speed airflow in the combustor from the pipe wall opening on the side surface.
The pipe wall opening is designed to be rectangular due to the limitation of the shape and size of the burner, and the area of the pipe wall opening can be optimized compared with other shapes, and of course, the pipe wall opening can also be in other shapes; when the opening areas of the pipe wall ports 1074 are the same, 3 pipe wall ports are arranged at equal intervals along the central axis of the combustor, and the local resistance is optimal; the cross sections of the central holes of the burner, the pore plate and the pore plate can also be deformed into other polygonal structures from a circle; the relative positions of the burner tube wall ports and the orifice plate may also vary.
As shown in fig. 6, the feeder 108 is of a truncated funnel-shaped structure, the bottom of the feeder is horizontal, a discharge spout is formed in the center of the bottom of the feeder, the discharge spout extends vertically downward to form a connecting portion 1081, the burner penetrates through the discharge spout below the upper portion of the funnel and enables the bottom end of a central hole of the hole plate 1073 to be flush with the bottom of the feeder 108, a through threaded hole is formed in the side wall of the connecting portion 1081, a bolt 1083 matched with the threaded hole penetrates through the threaded hole and then abuts against the wall of the burner body, the bolt is screwed inwards to enable the discharge spout to compress the burner, and the bolt is unscrewed outwards to enable the burner to move up and down, so that sand filling and collection in.
The height of the feeder is 6D1The upper inlet diameter is 10D1Bottom diameter of 3D1Diameter of discharge spout D1. The feeder adopts 304 stainless steel, and the welding position is polished to ensure that the inner wall is smooth and reduce friction.
The sand collecting and weighing device 2 comprises a tray 21, telescopic rod supports 22 and pressure sensors 23, the tray is sleeved on the upper portion of the combustor and is in non-contact with the outer wall of the combustor, the tray 21 is prevented from being in contact with the combustor to affect weighing, the tray is fixedly supported through the telescopic rod supports with the length adjustable in the 3 lower portions of the tray, and the three pressure sensors connected with a computer are respectively placed below each telescopic rod support and used for measuring the real-time data value of the sand mass sprayed from the combustor in the experimental process.
The design principle of the device is as follows: according to the continuity equation and Bernoulli equation
S1V1＝S2V2＝Q (1)
Wherein S is1、V1、P1、Z1The cross-sectional area, the wind speed, the pressure and the height of the combustor inlet are respectively; s2、V2、P2、Z2Respectively the cross-sectional area, the wind speed, the pressure and the height of the outlet of the central hole of the pore plate; g is the gas constant, ρ is the gas density, and Q is the volumetric flow of gas through the interior of the burner, assuming constant.
The density of propane is small, the distance between the burner inlet and the orifice plate is small, the bit pressure is ignored, and the equation (1) shows that the same flow gas passes through the center S of the orifice plate with a small cross section2Velocity V thereof2Will increase and, from equation (2), P can be derived2And then a vacuum is generated at the central outlet of the orifice plate.
The gas-solid mixture flame injection device utilizes the Venturi effect. The burner is provided with an orifice plate inside, the center of the orifice plate is provided with a central hole for generating Venturi effect, and the ratio of the diameter of the central hole to the nozzle diameter of the burner is 1/10. The venturi effect means that flowing gas enters from the inlet of the venturi tube, after passing through a section with a small cross section, the flow rate of the gas is increased, the pressure is suddenly reduced, and then a vacuum degree is generated in the inlet of the adsorption cavity, so that sand accumulated around the feeder is sucked into the burner, and is ejected from the outlet of the burner along with the high-speed flowing gas to form the effect of ejecting a gas-solid mixture upwards. If the gas is combustible, a gas-solid mixture jet fire is formed after encountering an ignition source.
The utility model relates to a gas-solid mixture sprays constructional device of fire when moving, fill up the feeder with sand 1082 earlier, open the gas alarm and carry out the gaseous detection of device, adjust gaseous mass flow controller according to the required requirement of experiment, then open the relief pressure valve of propane gas cylinder, make propane follow metal collapsible tube 103 in proper order, stainless steel pipe 104, gaseous mass flow controller 105, spark arrester 106, the soft 111 of gas transmission metal flows through, reachs combustor top export behind the orifice plate again, propane forms the negative pressure in the centre bore of orifice plate, sand gets into in the combustor main part from the pipe wall mouth department of side under the entrainment effect of negative pressure, and along with the propane air current is carried the combustor top export together, when gaseous mass flow controller is steady, ignite with some firearm to the export of combustor immediately; the conveyor 3 is started to replenish the sand 1082 in the feeder to ensure a stable continuous gas-solid mixture fire. The pipe wall openings arranged on the burner can change the area and the number according to the experimental working conditions so as to form different sand feeding speeds.
The method for measuring the sand ejection quality comprises the following steps:
after the feeder was filled with sand, the tray position was adjusted (so that it was not in contact with the burner), and the readings on the electronic balance and pressure sensor at this time were zeroed.
The conveying quality of the conveyor belt is recorded as m1The reading displayed on the electronic balance is recorded as m2The reading on the pressure sensor is recorded as m3。
① the conveyor belt is not activated and the electronic balance reads negative, when m2＝m3；
② the conveyor belt is started, m if the conveyor belt conveying quality is equal to the sand ejection quality2Is zero, then m1＝m3. (ensuring that the sand in the hopper is in a relatively stable condition) and using the reading from the sensor as the sand discharge quality.
The following application examples are the generation of a gas-solid mixture jet fire, and the parameters during the experiment are set as follows: the total length of the burner is 250mm, the inner diameter is 10mm, the thickness of the pore plate is 1mm, the diameter of the central hole is 1mm, the distance between the pore plate and the top of the burner is 120mm, and 3 axisymmetric rectangular openings (9 mm in length and 7mm in width) are arranged on the side surface of the burner. FIG. 7(a) shows a flow rate of 13slpm for propane gas and 120 mesh white quartz sand for sand; FIG. 7(b) shows a flow rate of 15slpm for propane gas and 80 mesh white quartz sand for sand.
Fig. 7(a) and 7(b) are jet flame diagrams of propane gas carrying sand sprayed out of the burner and ignited by an electronic pulse ignition gun, which show that the device can generate a gas-solid mixture jet fire. The flame shape is changed correspondingly by the propane gas with different flow rates and different sand meshes, fig. 7(a) selects 13slpm of propane gas flow rate, white quartz sand with the sand grain size of 120 meshes (125 micrometers), a section of strip-shaped sand column can be clearly seen to appear above the burner, flame with red color is arranged above the sand column, under the working condition, the sand grain size is small, the entrainment amount is large, the sand concentration is large, the jetting distance is small under the influence of gravity, the high-concentration sand in the sand column section isolates the propane gas from contacting with air, so that the section has no flame, and the flame body is red after no sand influence exists above the sand column; FIG. 7(b) selects propane gas flow 15slpm, the sand particle size is 80 mesh (175 micron) white quartz sand, a section of blue flame appears above the burner, under the working condition, the flow is large, the sand jet distance is large, the sand particle size is large, the entrainment amount is small, the concentration is low, the propane concentration is large, the sand isolates partial air again, the propane is insufficiently combusted, the blue flame appears, the upper part is sufficiently combusted, and the flame main body is yellow.
The above mentioned is only the preferred embodiment of the present invention, not as the further limitation of the present invention, and all the equivalent changes made by the contents of the specification and the drawings are within the protection scope of the present invention.
Claims (7)
1. A gas-solid mixture fire spraying device is characterized by comprising a gas-solid mixture fire spraying simulation device, a sand collecting and weighing device, a conveying device, a supporting device, a gas alarm, an electronic balance and a computer;
wherein, the gas-solid mixture jet fire simulation device comprises a combustible gas cylinder, a pressure reducing valve, a metal hose, a stainless steel pipe, a gas mass flow controller, a flame arrester, a burner, a feeder and an igniter;
the outlet end of the combustible gas cylinder is provided with a pressure reducing valve which is connected with the gas inlet end of the stainless steel pipe through a metal hose and an adapter in sequence; the middle section of the stainless steel pipe is provided with a gas mass flow controller, and the tail end of the stainless steel pipe is provided with a flame arrester;
the lower part of the burner vertically penetrates through the feeder and is connected with the flame arrester through a gas transmission metal hose;
a conveying device for conveying sand is arranged at an inlet at the upper end of the feeder;
the top end of the combustor is provided with an igniter;
the supporting device is arranged below the feeder and positioned on the electronic balance, and the upper part of the combustor is sleeved with the sand collecting and weighing device;
a gas alarm for detecting the air tightness is also arranged at the outlet of the combustible gas bottle;
the gas mass flow controller, the electronic balance and the sand collecting and weighing device are respectively connected with a computer through data lines.
2. The gas-solid mixture flaming device according to claim 1, wherein the burner is of a vertical tubular structure and comprises a burner body, an external threaded pipe and a perforated plate, the external threaded pipe is fixedly arranged at the lower end of the burner body, the gas transmission metal hose is in threaded connection with the external threaded pipe, the perforated plate is arranged at the lower section inside the burner body and is perpendicular to the central axis of the perforated plate, a central hole is formed in the center of the perforated plate, and more than three pipe wall ports are formed in the pipe wall of the burner body above the perforated plate around the central axis of the perforated plate.
3. A gas-solid mixture flaming device according to claim 2, wherein the burner has a length L, an inner diameter D and an outer diameter D1The distance from the bottom of the pore plate to the top end of the burner main body is
The distance from the top end of the pore plate to the top of the pipe wall opening is D, and the thickness of the pore plate and the diameter of the central hole of the pore plate are D
The pipe wall opening is as long as
4. A gas-solid mixture flaming device according to claim 3, wherein the feeder is of a frustum funnel-shaped structure, the bottom of the feeder is horizontal, a nozzle is arranged in the center of the bottom of the feeder, the nozzle extends vertically downwards to form a connecting part, the burner penetrates through the nozzle below the feeder from the upper part of the feeder, the bottom end of the central hole of the hole plate is flush with the bottom of the feeder, the side wall of the connecting part is provided with a through threaded hole, and the bottom of a bolt in threaded connection with the threaded hole abuts against the pipe wall of the burner body, so that the nozzle is pressed against the burner or separated from the burner.
5. A gas-solid mixture flaming device according to claim 4, wherein the feeder has a height of 6D1The upper inlet diameter is 10D1Bottom diameter of 3D1Diameter of discharge spout D1。
6. A gas-solid mixture fire injection device according to claim 1, wherein the support device comprises a cross rod, a telescopic vertical rod and a reinforcing disc, the cross rod is symmetrically and fixedly arranged on two sides of the feeder, the two telescopic vertical rods are symmetrically arranged on the reinforcing disc, and the two cross rods are respectively and correspondingly connected and fixed with the two telescopic vertical rods through bolts.
7. The gas-solid mixture fire spraying device according to claim 1, wherein the sand collecting and weighing device comprises a tray, a telescopic rod support and a pressure sensor, the tray is sleeved on the upper portion of the combustor, a gap is reserved between the tray and the outer wall of the combustor, the tray is supported by the telescopic rod support below the tray, the pressure sensor is mounted at the bottom of the telescopic rod support, and the pressure sensor is connected with a computer.
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| CN201921306151.4U CN210514213U (en) | 2019-08-13 | 2019-08-13 | Gas-solid mixture fire injection device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110346506A (en) * | 2019-08-13 | 2019-10-18 | 南京工业大学 | A kind of gas-solid mixture jet bubble reactor device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110346506A (en) * | 2019-08-13 | 2019-10-18 | 南京工业大学 | A kind of gas-solid mixture jet bubble reactor device |
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