CN109387542B - Multi-point source pool fire combustion simulation experiment platform and experiment method - Google Patents
Multi-point source pool fire combustion simulation experiment platform and experiment method Download PDFInfo
- Publication number
- CN109387542B CN109387542B CN201811627482.8A CN201811627482A CN109387542B CN 109387542 B CN109387542 B CN 109387542B CN 201811627482 A CN201811627482 A CN 201811627482A CN 109387542 B CN109387542 B CN 109387542B
- Authority
- CN
- China
- Prior art keywords
- burner
- liquid supplementing
- pressure sensor
- liquid
- container
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
- G01N25/22—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity on combustion or catalytic oxidation, e.g. of components of gas mixtures
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/12—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods using combustion
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Combustion & Propulsion (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Molecular Biology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The invention provides a multi-point source pool fire combustion simulation experiment platform which comprises an experiment table main body, a plurality of combustors, a liquid supplementing system and a control system, wherein the upper surface of the experiment table main body is provided with a spacing adjusting structure for adjusting the spacing of the combustors, and the combustors are arranged on the spacing adjusting structure through a first pressure sensor; the liquid supplementing system comprises a supporting frame, a liquid supplementing container and a lifting table structure for lifting the liquid supplementing container; and each liquid supplementing pipe is communicated with a liquid supplementing container through a connecting pipeline, and an electromagnetic valve is arranged on the connecting pipeline. Aiming at the characteristics of the fire chain accident of the multi-point source pool, the invention meets the comprehensive experimental requirements of measurement of the combustion characteristic parameters under the fire coupling effect of the multi-point source pool under the conditions of different liquid fuels, different fire source distances and different fire source sizes.
Description
Technical Field
The invention belongs to the technical field of combustion test equipment, relates to the field of fire protection, and particularly relates to a multi-point source pool fire combustion simulation experiment platform and an experiment method, which are used for simulating accident scenes of simultaneous combustion of multiple fire points in real conditions and developing multi-fire source combustion experiment researches of different liquid combustibles under different working conditions.
Background
Numerous oil tanks of different sizes and crisscrossed pipelines are characteristics of petrochemical enterprises, such as chemical plants, refineries and the like. Petrochemical materials and products are affected by complex internal and external factors in the production and storage processes, and fire accidents are extremely easy to occur. Because of numerous combustible materials and complex distribution of petrochemical enterprises, the multi-point source pool fire chain accident is a common disaster accident type in industrial places such as petrochemical enterprises, and the like, such as a multi-storage tank burning accident. The research on the evolution law of the fire coupling combustion dynamics of the multi-point source pool is a research hot spot in the current fire prevention and control technical field.
At present, the fuel adopted in the related experimental study of the multi-fire-source pool fire evolution law is mainly gas and liquid fuel, and the study is mainly focused on the aspects of multi-flame fusion law, flame temperature, flame height and the like, and has certain defects in the aspects of combustion rate, flow field measurement and the like. The experimental device can monitor the flow of the gas to calculate the combustion rate, but the reaction of the flame form change to the combustion rate during the multi-fire-source combustion cannot be considered, and the obtained result has certain limitation. The method is characterized in that a multi-fire-source combustion experiment is carried out by taking liquid as fuel, the average combustion rate of each fire source is estimated macroscopically according to the combustion time by using a video monitoring device, and the combustion rate of each fire source cannot be accurately monitored in real time at the same time; in addition, the conventional experimental device cannot simultaneously supplement fuel to each fire source in the experimental process so as to maintain the stability of the liquid level of each fire source.
In summary, in view of the limitations of the prior art, the present invention provides a new experimental platform and method for simulating multi-point source fire combustion.
Disclosure of Invention
In view of the above, the invention aims to provide a multi-point source pool fire combustion simulation experiment platform which can simulate the coupling condition of multiple fire sources during combustion and can meet the comprehensive experiment requirements of combustion characteristic parameter measurement under the coupling action of multiple fire sources under the conditions of different liquid fuels, different fire source distances and different fire source sizes. Based on the experimental platform, the multi-fire-source pool fire combustion experiment under different working conditions can be simulated and developed to obtain parameters such as combustion rate, temperature, multi-flame fusion height, radiant heat flow density, speed field and the like, so that the dynamics rule and the internal mechanism of multi-fire-source pool fire combustion are analyzed and revealed, the understanding of multi-fire-source pool fire accidents is deepened, and technical guidance is provided for formulating reasonable fire prevention and extinguishing measures.
In order to achieve the above purpose, the technical scheme of the invention is realized as follows:
the multi-point source pool fire combustion simulation experiment platform comprises an experiment table main body, a plurality of combustors, a workbench surface, a liquid supplementing system and a control system, wherein the upper surface of the experiment table main body is provided with a spacing adjusting structure for adjusting the spacing of the combustors, and the combustors are arranged on the spacing adjusting structure through a first pressure sensor; the liquid supplementing system comprises a supporting frame, a liquid supplementing container and a lifting table structure for lifting the liquid supplementing container, wherein the lifting table structure is fixed on the supporting frame, and the bottom of the liquid supplementing container is arranged on the lifting table structure through a second pressure sensor; each burner is provided with a fluid infusion tube, each fluid infusion tube is communicated with a fluid infusion container through a connecting pipeline, and the connecting pipeline is provided with an electromagnetic valve; the workbench surface is provided with a round hole matched with the burner in position, and the diameter of the round hole is larger than that of the burner; the workbench surface is fixed on the upper surface of the experiment table main body; the control system is in signal connection with the first pressure sensor, the second pressure sensor and the electromagnetic valve.
Further, the interval adjusting structure comprises a rectangular frame fixed on the upper surface of the experiment table main body, a pair of parallel sliding rails and a plurality of sliding rods, wherein the pair of parallel sliding rails are fixed on two sides of the rectangular frame, two ends of each sliding rod are respectively and slidably connected to the two sliding rails, the sliding rods are provided with a plurality of sliding blocks in a sliding manner, and each sliding block is provided with a locking device; and graduated scales are arranged on the periphery of the rectangular frame, so that the distance between the sliding blocks can be conveniently determined.
Further, the first pressure sensor is fixed on the sliding block through the gasket, and a concave tray bowl is installed above the first pressure sensor and used for being matched with a tray with a convex structure at the bottom, and meanwhile, a pin is arranged at the upper edge of the tray bowl and used for penetrating through a hole at the bottom of the tray to fix the tray.
Further, the upper surface of the tray is provided with grooves matched with the sizes of the burners, so that the burners are placed in a matched mode, and the burners with each size correspond to the matched tray.
Further, the workbench surface is of a square structure, is fixed on the upper surface of the main body of the experiment table through the supporting block of the workbench surface, is arranged in a gap with the burner and is not in contact with the burner.
Further, the experiment table main body is of a frame structure and comprises an upper rectangular supporting structure, lifting legs and a lower rectangular supporting structure, four corners of the upper rectangular supporting structure are connected with the lower rectangular supporting structure through the four lifting legs, and universal wheels are arranged at the bottom of the lower rectangular supporting structure;
further, the temperature measuring device also comprises a temperature measuring bracket, wherein the temperature measuring bracket comprises an inverted U-shaped frame formed by two vertical square steels and one horizontal square steel, a plurality of round holes are respectively formed in the two vertical square steels, a plurality of thin steel wires transversely penetrate through the corresponding round holes in the two vertical square steels, thermocouples are fixed on the thin steel wires, and the thermocouple is in signal connection with a control system; the upper surface of laboratory bench main part sets up the base of fixed vertical square steel.
Furthermore, the combustor is a circular oil pan, and the side wall of the oil pan is provided with an L-shaped metal extension pipeline so as to facilitate the communication between the connecting hose and the liquid supplementing container.
Further, the support frame is a two-layer frame structure, the middle partition plate used for layering is used for fixing the lifting platform structure, the upper space accommodates the liquid supplementing container, the lower layer is provided with an integrated frame body pipeline communicated with the liquid supplementing container, and the integrated frame body pipeline is communicated with the liquid supplementing pipe of the combustor.
Further, the lifting table structure comprises a lifting table surface, a screw lifting structure and a supporting rod, wherein the screw lifting structure is a turbine screw lifter or a screw lifter, the bottom of the lifting table surface is fixedly connected with the top of the screw lifting structure, and the box body of the screw lifting structure is fixedly connected with the supporting frame; the support rods are longitudinally fixed on the support frame, and the lifting table tops are respectively arranged on the support rods in a sliding manner through holes formed in the lifting table tops; the liquid replenishing container is placed on a second pressure sensor through a liquid replenishing container tray, and the second pressure sensor is fixed on the lifting table top.
Further, the liquid replenishing container is of a tank structure, a liquid outlet pipeline is arranged at the bottom of the side wall of the liquid replenishing container, and a switch is arranged on the liquid outlet pipeline.
Compared with the prior art, the invention has the following advantages:
(1) The liquid supplementing container, the burner, the pressure sensor, the electromagnetic valve and the connecting pipeline form a liquid supplementing loop, so that fuel can be added into the burning burner in real time, and the constant liquid level in the burner is realized;
(2) Through adjusting the distance between the sliding blocks and the sliding rods and replacing the burners with different diameters, experimental simulation of multi-point source fires under different fire source distances and different fire source sizes can be realized;
(3) The loss rate of fuel can be recorded in real time through the pressure sensor below the liquid supplementing container, so that the combustion rate of each fire source can be monitored in real time;
(4) The invention can simulate and develop multi-fire-source pool fire combustion experiments of different liquid fuels under different working conditions, obtain characteristic parameters such as combustion rate, temperature, radiant heat flow density, speed field and the like, has wide research range and large obtained data volume, and is favorable for deep analysis of the multi-fire-source pool fire combustion process.
The invention further aims to provide an experimental method based on the multi-point source pool fire combustion simulation experimental platform, which comprises the following steps:
(1) Determining the number of fire sources and the distance between the fire sources, and adjusting the distance between the sliding blocks of the distance adjusting structure;
(2) Installing a burner and a workbench surface with corresponding dimensions on an experimental device;
(3) Setting an initial fuel value M in a combustor;
(4) The control system controls the electromagnetic valve to be opened for initial fluid replacement;
(5) When the first pressure sensor monitors that the fluid replacement quantity reaches an initial value M, the electromagnetic valve does not act, and fuel in the combustor is ignited;
(6) Collecting real-time record data of the first pressure sensor until combustion is exhausted;
(7) Estimating the combustion rate of each fire source, and finding out the maximum combustion rate;
(8) Comparing whether the liquid supplementing rate is greater than the maximum combustion rate;
(9) If the liquid supplementing rate is smaller than the maximum combustion rate, the height difference between the burner and the liquid supplementing container is increased, and the steps are repeated again until the liquid supplementing rate is larger than the maximum combustion rate;
(10) If the rate of fluid replacement is greater than the maximum burn rate, then the experiment is started.
(11) In the experimental process, the electromagnetic valve is in an action state;
(12) Performing initial fluid infusion until the initial value M is reached;
(13) Igniting the fuel in the burner;
(14) The method comprises the steps that the quality of fuel in a combustor is monitored in real time through a first pressure sensor, once the fuel in the combustor is less than an initial value M, an electromagnetic valve is opened, then the fuel in a fluid infusion container is used for conducting fluid infusion on the combustor in real time through a pipeline, once the fuel in the combustor is equal to the initial value M, the electromagnetic valve is closed, the fuel in the combustor is circulated and reciprocated in this way, the liquid level is stable, and in the process, a second pressure sensor records the quality change condition of the fuel in the fluid infusion container in real time, so that the combustion rate is calculated;
(15) In the real-time fluid infusion process, thermocouples, particle image velocimetry systems, radiant heat flux meters, cameras and other testing systems can be arranged around the experimental platform to conduct temperature measurement experiments, flow field measurement experiments, radiant heat flux density measurement experiments and flame fusion experiments, and data acquisition is conducted on various parameters in the experimental process;
(16) After the recorded data meet the data acquisition requirement, the electromagnetic valve does not act;
(17) Waiting for fuel in the burner to burn out;
(18) The experiment was ended.
The method has the same advantages as the experimental platform compared with the prior art, and is not repeated here.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
FIG. 1 is a schematic perspective view of an experimental platform according to an embodiment of the present invention;
FIG. 2 is a side view of a three-dimensional structure of an experimental platform according to an embodiment of the invention;
FIG. 3 is a state diagram of the installation of the working surface of the experimental platform according to the embodiment of the invention;
FIG. 4 is a schematic view of a burner according to an embodiment of the present invention;
FIG. 5 is a schematic view of a spacing adjustment structure according to an embodiment of the present invention;
FIG. 6 is a perspective view of a mounting structure of a burner and a slider according to an embodiment of the present invention;
FIG. 7 is a side view of a burner and slider mounting structure according to an embodiment of the present invention;
FIG. 8 is a schematic view of a temperature measurement stand according to an embodiment of the present invention;
FIG. 9 is a schematic view of a table top according to an embodiment of the present invention;
FIG. 10 is a perspective view of a fluid replacement system according to an embodiment of the present invention;
FIG. 11 is a front view of a fluid replacement system according to an embodiment of the present invention;
FIG. 12 is a side view of a fluid replacement system according to an embodiment of the present invention;
FIG. 13 is a block diagram of a fluid replacement vessel and a second pressure sensor mounting portion according to an embodiment of the present invention;
fig. 14 a and b are a perspective view and a side view, respectively, of a tray according to an embodiment of the present invention.
Reference numerals illustrate:
the device comprises a 1-experiment table main body, a 2-burner, a 3-working table, a 4-temperature measuring bracket, a 5-table supporting block, a 6-sliding rail, a 7-sliding bar, an 8-sliding block, a 9-first pressure sensor, a 10-tray, an 11-vertical square steel, a 12-horizontal square steel, a 13-thin steel wire, a 14-supporting frame, a 15-fluid infusion container, a 16-lifting table, a 17-lifting handle, a 18-lead screw lifting structure, a 19-fluid infusion outlet, a 20-metal connecting pipeline, a 21-electromagnetic valve, a 22-connecting port, a 23-fluid outlet, a 24-fluid infusion groove, a 25-universal wheel, a 26-second pressure sensor, a 27-locking device, a 28-graduated scale, a 29-tray bowl, a 30-lifting leg, a 31-gasket, a 32-pin, a 33-groove, a 34-bulge and a 35-fluid infusion container tray.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in a specific case.
The invention will be described in detail below with reference to the drawings in connection with embodiments.
The multi-point source pool fire combustion simulation experiment platform of the embodiment, as shown in figures 1 to 12, comprises an experiment table main body 1, a burner 2, a working table surface 3, a liquid supplementing system and a control system,
the upper surface of the experiment table main body 1 is provided with a spacing adjusting structure for adjusting the spacing of the burners 2, and the burners 2 are arranged on the spacing adjusting structure through a first pressure sensor 9 at the bottom;
the liquid supplementing system comprises a supporting frame 14, a liquid supplementing container 15 and a lifting platform structure for lifting the liquid supplementing container 15, wherein the lifting platform structure is fixed on the supporting frame 14, and the bottom of the liquid supplementing container 15 is arranged on the lifting platform structure through a second pressure sensor 26;
each burner 2 is provided with a fluid infusion tube, each fluid infusion tube is communicated with a fluid infusion container through a connecting pipeline, and the connecting pipeline is provided with an electromagnetic valve 21;
the workbench surface 3 is provided with a round hole matched with the burner 2 in position, the diameter of the round hole is larger than that of the burner 2, and the round hole is arranged in a clearance way with the burner and is not in contact with the burner; the workbench surface 3 is fixed on the upper surface of the experiment table main body 1;
the control system controls and connects the first pressure sensor 9, the second pressure sensor 26 and the solenoid valve 21.
Specifically, the laboratory bench main part is frame construction, including last rectangle bearing structure, lift leg, lower rectangle bearing structure, goes up rectangle bearing structure's four angles and passes through four lift legs 30 and connect lower rectangle bearing structure, universal wheel 25 is installed to lower rectangle bearing structure's bottom, convenient removal.
Specifically, as shown in fig. 5, the interval adjusting structure includes a rectangular frame fixed on the upper surface of the main body of the experiment table, a pair of parallel sliding rails 6, 3 rows of sliding rails 7, a pair of parallel sliding rails 6 are fixed on two sides of the rectangular frame, two ends of each row of sliding rails 7 are respectively and slidably connected to two sliding rails 6, a plurality of sliding blocks 8 are slidably arranged on each row of sliding rails 7, a locking device 27 is arranged on each sliding block 8, the locking device 27 is a screw, the screw is screwed into a threaded hole on the sliding block, and the bottom of the locking device contacts the sliding rails 7 to lock; and graduated scales 28 are arranged on the periphery of the rectangular frame, so that the distance between the sliding blocks 8 can be conveniently determined.
As shown in fig. 14, the first pressure sensor 9 is fixed on the sliding block 8 through a gasket, a concave tray bowl 29 is installed above the first pressure sensor 9 and is used for being matched with a tray 10 with a bulge 34 at the bottom, and a pin 32 is arranged at the upper edge of the tray bowl 29 and is used for penetrating through an opening at the bottom of the tray 10 to fix the tray 10.
The upper surface of the tray 10 has grooves 33 sized to fit the burners 2 for the placement of the burners 2, each size of burner 2 corresponding to its cooperating tray 10.
The burner 2 can move on the transversely arranged slide bars 7 along with the slide blocks 8, and meanwhile, two ends of the transversely arranged slide bars 7 can move along the longitudinally arranged slide rails 6, so that the position of the burner 2 is changed.
As shown in fig. 1 to 3, the experiment table main body 1 is a rectangular frame structure, the heights of four supporting legs of the frame structure are adjustable, and universal wheels with braking devices are arranged at the bottoms of the frame structure, so that the movement is convenient.
The experiment platform also comprises a workbench surface 3 which is mainly used for simulating the actual conditions such as the ground and the like, and side stream wind is prevented from being formed from the bottom of the burner; the workbench surface 3 is of a square structure, and is provided with a round hole matched with the burner 2 in position; 4 table top supporting blocks 5 are arranged on the upper surface of the experiment table main body 1, two small holes are respectively arranged on two sides of the working table top 3, and the small holes penetrate through pins on the table top supporting blocks 5 to fix and support the working table top 3; the height of the table support block 5 is higher than that of the liquid supplementing pipe on the side wall of the combustor 2, so that the table 3 is prevented from contacting the relevant part of the combustor 2.
As shown in fig. 9, the working table 3 is square, the length dimension is 1.5m, a circular hole of 3×3 array is formed by taking the geometric center position as the center, the size of the opening of the circular hole is larger than the size of the burner 2 by 1cm, that is, the diameter of the circular hole is larger than the diameter of the circular burner 2 by 1cm, so that the working table 3 is not contacted with the burner 2. The opening size is different for different sized burners 2, and at the same time, the spacing of the circular holes is also different for different burner 2 spacing.
The experiment platform also comprises a temperature measurement bracket 4 for fixing a thermocouple, and the thermocouple signal is connected with a control system and used for collecting a combustion temperature signal. As shown in fig. 8, the temperature measurement bracket 4 comprises an inverted U-shaped frame formed by two vertical square steels 11 and one horizontal square steel 12, wherein a round hole is formed in each 5cm of the two vertical square steels 11, a plurality of thin steel wires 13 transversely penetrate through corresponding round holes in the two vertical square steels 11, and thermocouples are fixed on the thin steel wires 13; four corner positions of the upper surface of the frame structure of the experiment table main body 1 are provided with bases matched with the vertical square steels 11, and the two vertical square steels 11 are respectively inserted into the bases at any diagonal positions, so that the temperature measuring bracket 4 can be fixed.
As shown in FIG. 4, the burner 2 is a circular oil pan, and this embodiment includes three kinds of circular oil pans each having a diameter of 10cm, 7.5cm, and 5cm, the wall of the circular oil pan is 5cm, and the side wall of the oil pan is provided with an L-shaped metal extension pipe, so as to facilitate communication between the connection hose and the fluid infusion container.
The fluid infusion system mainly achieves the function of initial fluid infusion of the combustor 2 and real-time fluid infusion in the combustion process.
The supporting frame 14 is a two-layer frame structure, and is used for fixing the lifting platform structure by a layered middle partition plate, the upper-layer space accommodates the liquid replenishing container 15, and the lower layer is provided with an integrated frame pipeline communicated with the liquid replenishing container 15.
Specifically, the lifting platform structure comprises a lifting platform surface 16, a screw lifting structure 18 and a supporting rod, wherein the screw lifting structure 18 can select a turbine screw lifter or a screw lifter, and the lifting platform structure belongs to the prior art; the bottom of the lifting table top 16 is fixedly connected with the top of the screw lifting structure 18, and the lifting handle 17 of the turbine screw lifting structure 18 extends to the side surface of the supporting frame 14; the 4 support rods are longitudinally fixed between the upper layers of the support frame 14, and the four corners of the lifting table top 16 are respectively arranged on the 4 support rods in a sliding manner through holes formed in the four corners of the lifting table top, so that the lifting table top is stable. As shown in fig. 13, the fluid replacement container 15 is disposed on the second pressure sensor 26 through the fluid replacement container tray 35, and the second pressure sensor 26 is fixed on the lifting table 16, so as to monitor the quality of the fuel in the fluid replacement container 15.
Specifically, in this embodiment, the number of the fluid infusion containers 15 is 9, and the fluid infusion containers are tank bodies with a diameter of 15cm and a height of 25 cm. A liquid outlet pipeline is arranged at the bottom of the side wall of the liquid supplementing container 15, and a manually opened and closed switch is arranged on the liquid outlet pipeline. The liquid level of the fuel in the liquid replenishing container 15 can be adjusted along with the lifting table top 16.
The integrated frame body pipeline comprises a plurality of metal connecting pipelines 20 which are arranged in parallel, and the upper ends of the metal connecting pipelines 20 are connected with a liquid outlet pipeline on the side wall of the liquid supplementing container 15 through hoses; the bottom end of the metal connecting pipeline 20 is sequentially provided with an electromagnetic valve 21, a connecting port 22 and a liquid outlet 23, and the connecting port 22 is connected with a liquid supplementing pipe of the combustor 2 through a hose so as to form a closed pipeline for supplementing liquid to the combustor 2. The liquid discharge port 23 and the pipeline of the connecting port 22 are provided with manual switches, and the switches are always closed when liquid supplementing is carried out. The drain tank 24 is placed under the drain port 23, and after the experiment is completed, the switch between the connection port 22 and the drain port 23 is opened, so that the residual fuel in the pipeline can be discharged to the drain tank 24.
The lower layer of the supporting frame 14 has a horizontal dimension of 150cm x 80cm and a height of 100cm, and the bottom of the lower layer is provided with a universal wheel 25 with a braking device, so that the lower layer is convenient to move.
The control system comprises a computer master control device, wherein the computer master control device is used for collecting temperature data of thermocouples, collecting pressure data of the first pressure sensor 9 and the second pressure sensor 26 and controlling on-off of the electromagnetic valve 21, so that stable value setting of fuel in the combustor 2, zero clearing of the weights of the combustor 2 and the fluid infusion container 15 and multipath data collection can be realized.
The function of this embodiment is realized:
determining the number of fire sources and the interval between the fire sources, placing the corresponding size and number of burners 2 on a tray 10, and setting the interval between the burners 2 by utilizing a slide bar 7 and a slide rail 6; after the position of the burner 2 is determined, the corresponding working table 3 is placed on the experiment table main body 1 and is fixed through the table support block 5; each burner 2 is communicated with a pipeline of the corresponding liquid supplementing container 15, and the on-off of the pipeline is controlled through an electromagnetic valve 21;
opening a control system, and setting readings of the first pressure sensor 9 and the second pressure sensor 26 below the combustor 2 and the fluid replacement container 15 to zero; adding fuel required by experiments to the liquid supplementing container 15, and then lifting the liquid supplementing container 15 by using a lead screw lifting structure 18 to ensure that the liquid supplementing container has a certain height difference with the burner 2;
setting parameters such as initial mass M, tolerance and the like of fuel in the combustor 2 through a control system; the control system controls the electromagnetic valve 21 to be opened for initial fluid replacement of the combustor 2, and when the fuel mass in the combustor 2 is detected to reach M, the control system controls the fluid replacement to be stopped; then manually igniting the fuel in the burner 2, when the mass of the fuel in the burner 2 is lower than M due to combustion, the first pressure sensor 9 transmits a signal to the control system to control the electromagnetic valve 21 to be opened, the fuel in the liquid supplementing container 15 is automatically supplemented into the burner 2, and when the mass of the fuel in the burner 2 is equal to M, the electromagnetic valve 21 is automatically closed to stop liquid supplementing; so reciprocating, the fuel in the combustor 2 can be always maintained at M, and the stability of the fuel liquid level is ensured;
in the process of the real-time fluid infusion, the second pressure sensor 26 records the reduction amount of the fuel in the fluid infusion container 15 in real time, so as to calculate the loss rate of the fuel in the combustor 2, and in the process of the real-time fluid infusion, thermocouples, radiant heat flux meters, particle image velocimeters, cameras and other testing instruments can be arranged around the experimental platform to perform data acquisition on parameters such as temperature, radiant heat flux density, flow field, flame form and the like;
after the data acquisition in the real-time liquid supplementing process is finished, the electromagnetic valve 21 is controlled to be in a closed state by the control system, the liquid supplementing container 15 does not supplement fuel to the burner 2, the fuel in the burner 2 is combusted slowly, and the experiment is finished.
The specific experimental procedure of this example is as follows:
(1) Determining the number of fire sources and the distance between the fire sources, and adjusting the distance between the sliding blocks of the distance adjusting structure;
(2) Installing a burner and a workbench surface with corresponding dimensions on an experimental device;
(3) Setting an initial fuel value M in the combustor 2;
(4) The control system controls the solenoid valve 21 to be opened for initial fluid replacement;
(5) When the first pressure sensor 9 detects that the fluid replacement amount reaches an initial value M, the electromagnetic valve 21 does not act, and fuel in the combustor 2 is ignited;
(6) Collecting real-time recorded data of the first pressure sensor 9 until the combustion is exhausted;
(7) Estimating the combustion rate of each fire source, and finding out the maximum combustion rate;
(8) Comparing whether the liquid supplementing rate is greater than the maximum combustion rate;
(9) If the make-up rate is less than the maximum burn rate, the height difference between the burner 2 and the make-up vessel 15 is increased and the above steps are repeated until the make-up rate is greater than the maximum burn rate.
(10) If the rate of fluid replacement is greater than the maximum burn rate, then the experiment is started.
(11) During the experiment, the solenoid valve 21 was in an actuated state;
(12) Performing initial fluid infusion until the initial value M is reached;
(13) Igniting the fuel in the burner 2;
(14) At this moment, the liquid level stabilizing system starts to work, the quality of fuel in the burner is monitored in real time through the first pressure sensor 9, once the fuel in the burner 2 is less than an initial value M, the electromagnetic valve 21 is opened, then the fuel in the liquid supplementing container 15 supplements the fuel in the burner 2 in real time through a pipeline, once the fuel in the burner 2 is equal to the initial value M, the electromagnetic valve 21 is closed, the circulation is performed in this way, the effect of stabilizing the liquid level is achieved, and in the process, the second pressure sensor 26 records the quality change condition of the fuel in the liquid supplementing container 15 in real time, so that the combustion rate is calculated;
(15) In the real-time fluid infusion process, other testing systems such as thermocouples, particle image velocimetry systems, radiant heat flux meters, cameras and the like can be arranged around the experimental platform to carry out temperature measurement experiments, flow field measurement experiments, radiant heat flux density measurement experiments, flame fusion experiments and the like, and data acquisition is carried out on various parameters in the experimental process;
(16) After recording the data for several minutes (after the data acquisition requirement is reached), the solenoid valve 21 does not act;
(17) Waiting for fuel in the burner 2 to burn out;
(18) The experiment was ended.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (7)
1. The multi-point source pool fire combustion simulation experiment platform is characterized in that: comprises a laboratory table main body, a plurality of burners, a working table surface, a liquid supplementing system and a control system,
the upper surface of the experiment table main body is provided with a distance adjusting structure for adjusting the distance between the burners, and the burners are arranged on the distance adjusting structure through a first pressure sensor;
the liquid supplementing system comprises a supporting frame, a liquid supplementing container and a lifting table structure for lifting the liquid supplementing container, wherein the lifting table structure is fixed on the supporting frame, and the bottom of the liquid supplementing container is arranged on the lifting table structure through a second pressure sensor;
each burner is provided with a liquid supplementing pipe, each liquid supplementing pipe is communicated with a liquid supplementing container through a connecting pipeline, and the connecting pipeline is provided with an electromagnetic valve;
the workbench surface is provided with a round hole matched with the burner in position, the diameter of the round hole is larger than that of the burner, and the round hole is arranged in a clearance with the burner; the workbench surface is fixed on the upper surface of the experiment table main body;
the control system is in signal connection with the first pressure sensor, the second pressure sensor and the electromagnetic valve;
the interval adjusting structure comprises a rectangular frame fixed on the upper surface of the experiment table main body, a pair of parallel sliding rails and a plurality of sliding rods, wherein the pair of parallel sliding rails are fixed on two sides of the rectangular frame, two ends of each sliding rod are respectively connected to the two sliding rails in a sliding manner, the sliding rods are provided with a plurality of sliding blocks in a sliding manner, and each sliding block is provided with a locking device; a graduated scale is arranged around the rectangular frame;
the first pressure sensor is fixed on the sliding block through a gasket, a concave tray bowl is arranged above the first pressure sensor and used for being matched with a tray with a convex structure at the bottom, and meanwhile, pins are arranged at the upper edge of the tray bowl and used for penetrating through holes at the bottom of the tray to fix the tray; the upper surface of the tray is provided with a groove matched with the size of the burner, so that the burner is placed in a matched mode, and the burner with each size corresponds to the tray matched with the burner;
the multi-point source pool fire combustion simulation experiment platform further comprises a temperature measurement bracket, wherein the temperature measurement bracket comprises an inverted U-shaped frame formed by two vertical square steels and one horizontal square steel, a plurality of round holes are respectively formed in the two vertical square steels, a plurality of thin steel wires transversely penetrate through the corresponding round holes in the two vertical square steels, thermocouples are fixed on the thin steel wires, and the thermocouple signals are connected with a control system; the upper surface of laboratory bench main part sets up the base of fixed vertical square steel.
2. The multi-point source pool fire combustion simulation experiment platform according to claim 1, wherein: the experiment table main body is of a frame structure and comprises an upper rectangular supporting structure, lifting legs and a lower rectangular supporting structure, wherein four corners of the upper rectangular supporting structure are connected with the lower rectangular supporting structure through four lifting legs, and universal wheels are arranged at the bottom of the lower rectangular supporting structure.
3. The multi-point source pool fire combustion simulation experiment platform according to claim 1, wherein: the combustor is a circular oil pan, an L-shaped metal extension pipeline is arranged on the side wall of the oil pan, and the combustor is communicated with the liquid supplementing container through a connecting hose.
4. The multi-point source pool fire combustion simulation experiment platform according to claim 1, wherein: the support frame is a two-layer frame structure, the middle partition plate used for layering is used for fixing the lifting platform structure, the upper space accommodates the liquid replenishing container, the lower layer is provided with an integrated frame body pipeline communicated with the liquid replenishing container, and the integrated frame body pipeline is communicated with the liquid replenishing pipe of the combustor.
5. The multi-point source pool fire combustion simulation experiment platform according to claim 1, wherein: the lifting table structure comprises a lifting table surface, a screw lifting structure and a supporting rod, wherein the screw lifting structure is a turbine screw lifter or a screw lifter, the bottom of the lifting table surface is fixedly connected with the top of the screw lifting structure, and a box body of the screw lifting structure is fixedly connected with the supporting frame; the support rods are longitudinally fixed on the support frame, and the lifting table tops are respectively arranged on the support rods in a sliding manner through holes formed in the lifting table tops; the liquid replenishing container is placed on a second pressure sensor through a liquid replenishing container tray, and the second pressure sensor is fixed on the lifting table top.
6. The multi-point source pool fire combustion simulation experiment platform according to claim 1, wherein: the liquid replenishing container is of a tank structure, a liquid outlet pipeline is arranged at the bottom of the side wall of the liquid replenishing container, and a switch is arranged on the liquid outlet pipeline.
7. An experimental method based on the multi-point source pool fire combustion simulation experiment platform as claimed in any one of claims 1 to 6, which is characterized by comprising the following steps:
(1) Determining the number of fire sources and the distance between the fire sources, and adjusting the distance between the sliding blocks of the distance adjusting structure;
(2) Installing a burner and a workbench surface with corresponding dimensions on an experimental device;
(3) Setting an initial fuel value M in a combustor;
(4) The control system controls the electromagnetic valve to be opened for initial fluid replacement;
(5) When the first pressure sensor monitors that the fluid replacement quantity reaches an initial value M, the electromagnetic valve does not act, and fuel in the combustor is ignited;
(6) Collecting real-time record data of the first pressure sensor until combustion is exhausted;
(7) Estimating the combustion rate of each fire source, and finding out the maximum combustion rate;
(8) Comparing whether the liquid supplementing rate is greater than the maximum combustion rate;
(9) If the liquid supplementing rate is smaller than the maximum combustion rate, the height difference between the burner and the liquid supplementing container is increased, and the steps are repeated again until the liquid supplementing rate is larger than the maximum combustion rate;
(10) If the rate of fluid replacement is greater than the maximum burn rate, then the experiment is started;
(11) In the experimental process, the electromagnetic valve is in an action state;
(12) Performing initial fluid infusion until the initial value M is reached;
(13) Igniting the fuel in the burner;
(14) The method comprises the steps that the quality of fuel in a combustor is monitored in real time through a first pressure sensor, once the fuel in the combustor is less than an initial value M, an electromagnetic valve is opened, then the fuel in a fluid infusion container is used for conducting fluid infusion on the combustor in real time through a pipeline, once the fuel in the combustor is equal to the initial value M, the electromagnetic valve is closed, the fuel in the combustor is circulated and reciprocated in this way, the liquid level is stable, and in the process, a second pressure sensor records the quality change condition of the fuel in the fluid infusion container in real time, so that the combustion rate is calculated;
(15) In the real-time fluid infusion process, a thermocouple, a particle image velocimetry system, a radiation heat flow meter and a camera are arranged around an experimental platform to perform temperature measurement experiments, flow field measurement experiments, radiation heat flow density measurement experiments and flame fusion experiments, and data acquisition is performed on various parameters in the experimental process;
(16) After the recorded data meet the data acquisition requirement, the electromagnetic valve does not act;
(17) Waiting for fuel in the burner to burn out;
(18) The experiment was ended.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811627482.8A CN109387542B (en) | 2018-12-28 | 2018-12-28 | Multi-point source pool fire combustion simulation experiment platform and experiment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811627482.8A CN109387542B (en) | 2018-12-28 | 2018-12-28 | Multi-point source pool fire combustion simulation experiment platform and experiment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109387542A CN109387542A (en) | 2019-02-26 |
| CN109387542B true CN109387542B (en) | 2023-09-29 |
Family
ID=65430792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811627482.8A Active CN109387542B (en) | 2018-12-28 | 2018-12-28 | Multi-point source pool fire combustion simulation experiment platform and experiment method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109387542B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111024432A (en) * | 2019-12-26 | 2020-04-17 | 华南理工大学 | Device capable of measuring influence of multi-pool fire of any size on target equipment |
| CN111257369B (en) * | 2020-01-21 | 2023-09-29 | 上海海事大学 | Marine oil spill burning simulation test bed |
| CN113077673B (en) * | 2021-03-10 | 2022-12-23 | 西南交通大学 | Asymmetric double-gas fire source flame fusion experiment simulation device |
| CN113899579A (en) * | 2021-11-15 | 2022-01-07 | 应急管理部天津消防研究所 | Heat-driven fire cyclone simulation experiment device |
| CN115683920A (en) * | 2022-12-21 | 2023-02-03 | 中国科学技术大学 | Large-scale Chi Huo multipoint type mass loss rate measuring system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3367384A (en) * | 1966-05-09 | 1968-02-06 | James T. Voorheis | Methods for burning fuel, burners and systems for burning fuels and apparatus in which said burners and/or systems are parts thereof |
| KR100977618B1 (en) * | 2009-09-07 | 2010-08-24 | 주식회사 페스텍인터내셔날 | Single burning items system for testing and estimating fire property by burning of a object |
| CN102879292A (en) * | 2012-09-25 | 2013-01-16 | 中国科学技术大学 | Combustion experimental facility capable of realizing continuousness and stability of liquid level |
| CN104749315A (en) * | 2015-02-13 | 2015-07-01 | 华中科技大学 | Carbon-containing solid fuel mixed combustion test device and method |
| CN106198849A (en) * | 2016-09-14 | 2016-12-07 | 中国科学技术大学 | A kind of test device for solid propellant combustion rate/combustion temperature and method of testing thereof |
| CN106872638A (en) * | 2017-02-13 | 2017-06-20 | 武汉理工大学 | A kind of pond fire dimensional effect heat transfer modes measuring system based on size continuous variable oil sump device |
| CN209486024U (en) * | 2018-12-28 | 2019-10-11 | 公安部天津消防研究所 | Multiple sources pond fire combustion simulation experiment porch |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8967997B2 (en) * | 2012-02-13 | 2015-03-03 | Factory Mutual Insurance Company | System and components for evaluating the performance of fire safety protection devices |
-
2018
- 2018-12-28 CN CN201811627482.8A patent/CN109387542B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3367384A (en) * | 1966-05-09 | 1968-02-06 | James T. Voorheis | Methods for burning fuel, burners and systems for burning fuels and apparatus in which said burners and/or systems are parts thereof |
| KR100977618B1 (en) * | 2009-09-07 | 2010-08-24 | 주식회사 페스텍인터내셔날 | Single burning items system for testing and estimating fire property by burning of a object |
| CN102879292A (en) * | 2012-09-25 | 2013-01-16 | 中国科学技术大学 | Combustion experimental facility capable of realizing continuousness and stability of liquid level |
| CN104749315A (en) * | 2015-02-13 | 2015-07-01 | 华中科技大学 | Carbon-containing solid fuel mixed combustion test device and method |
| CN106198849A (en) * | 2016-09-14 | 2016-12-07 | 中国科学技术大学 | A kind of test device for solid propellant combustion rate/combustion temperature and method of testing thereof |
| CN106872638A (en) * | 2017-02-13 | 2017-06-20 | 武汉理工大学 | A kind of pond fire dimensional effect heat transfer modes measuring system based on size continuous variable oil sump device |
| CN209486024U (en) * | 2018-12-28 | 2019-10-11 | 公安部天津消防研究所 | Multiple sources pond fire combustion simulation experiment porch |
Non-Patent Citations (3)
| Title |
|---|
| A multi-point source thermal radiation model of pool fire;Jianfeng Zhou;Applied Mechanics and Materials;第380-384卷;第1685-1688页 * |
| 庚烷池火多火源燃烧特性的实验研究;李政;刘乃安;;火灾科学(第03期);第109-116页 * |
| 离散分布多火源燃烧速率计算模型研究;林圣泽 等;燃烧科学与技术;第23卷(第3期);第274-279页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109387542A (en) | 2019-02-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109387542B (en) | Multi-point source pool fire combustion simulation experiment platform and experiment method | |
| Hu et al. | Soot measurements at the axis of an ethylene/air non-premixed turbulent jet flame | |
| Boïarciuc et al. | Soot volume fractions and primary particle size estimate by means of the simultaneous two-color-time-resolved and 2D laser-induced incandescence | |
| Chunmiao et al. | Ignition behavior of magnesium powder layers on a plate heated at constant temperature | |
| Walsh et al. | Experimental and computational study of temperature, species, and soot in buoyant and non-buoyant coflow laminar diffusion flames | |
| CN110567833A (en) | Multi-scale circular oil pool fire array experimental device capable of maintaining stable combustion | |
| CN112485295A (en) | Integrated test platform for fire resistance of external heat source of oil-immersed transformer | |
| CN108732058B (en) | Large-scale oil pool fire burning rate measuring device and measuring method | |
| CN110068763A (en) | A kind of battery thermal safety and fire extinguishing system comprehensive detection platform | |
| CN209486024U (en) | Multiple sources pond fire combustion simulation experiment porch | |
| Santoni et al. | Dynamic modelling of upslope fire growth | |
| Babrauskas | Temperatures in flames and fires | |
| Benfer | Spill and burning behavior of flammable liquids | |
| Georges et al. | Burning rate of elevated pool fire in a well-ventilated compartment: Effects of radiative heat fluxes | |
| CN110059347A (en) | The experiment research platform and method of fire incident in a kind of simulation reprocessing facility | |
| CN207763746U (en) | Tank for liquefied gas thermal response simulation experimental provision | |
| CN106501312A (en) | A kind of tunnel fire hazard burning HRR test system | |
| Gomez | Experiments for the measurement of LNG mass burning rates | |
| CN112083046A (en) | Platform and method for detecting hydrogen monitoring device | |
| KR20190044081A (en) | Jet Fuel Fire Simulator | |
| Madrzykowski et al. | Fire pattern repeatability: a study in uncertainty | |
| Sung et al. | Velocity and temperature structure of medium-scale pool fires | |
| CN210268705U (en) | Comprehensive detection platform for battery fire extinguishing system | |
| CN210270098U (en) | Battery thermal safety performance and fire extinguishing system comprehensive detection platform | |
| Shen et al. | Analysis for fire plume temperature in developing area and radiation heat flux distribution in small-scale Pool fire |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 300381 No. 110 South Jin Wei Road, Tianjin, Nankai District Applicant after: TIANJIN FIRE Research Institute OF MEM Address before: 300381 No. 110 South Jin Wei Road, Tianjin, Nankai District Applicant before: TIANJIN FIRE Research Institute |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |