A dual-fire source combustion experimental device capable of mixing aerated fluid

Abstract

The present invention discloses a dual-fire source combustion experimental device capable of mixing with a gasified fluid. The device is composed of two sets of fire source combustion experimental devices, the fire source combustion experimental devices comprising: a first gas device, comprising a gas storage cylinder, a gas cylinder valve, a pressure gauge, a gas flow meter, and a first gas transport pipeline connected in sequence; a second gas device, comprising a peristaltic pump, a liquid collecting pipe, a liquid flow meter, and a second gas transport pipeline connected in sequence; a gas mixing device, comprising a mixed gas transport pipeline and a burner nozzle connected in sequence, a temperature sensor being installed on the lower side of the burner nozzle; and a burner box device, comprising a box and a burner holder installed on the outside of the box. The present invention provides a flame experimental device with adjustable dual-fire source spacing and capable of mixing with a certain gasified fluid. The dual-fire source spacing, fire source power, and gasified fluid type can be changed, facilitating dual-fire source combustion experiments with different spacings and different gas mixtures.

Description

Technical Field

[0001] The invention belongs to the technical field of dual-fire source combustion and fire, and in particular relates to a dual-fire source combustion experimental device capable of mixing aerated fluid. Background Art

[0002] With the development of industry, combustion gases, such as natural gas and biogas, are increasingly being used as clean energy sources. Non-combustible gases such as water vapor and carbon dioxide are also important components of these gases, and their content can influence flame combustion characteristics. During a fire, factors such as the combustion behavior of the fire source, smoke diffusion, temperature distribution, and ventilation conditions have a significant impact on fire development and the safe evacuation of personnel. In specialized locations such as laboratories, certain reagents or fluids can evaporate and support combustion, thus affecting flame combustion. Therefore, studying the effects of liquid evaporation on flame combustion is of great significance. For example, the addition of water vapor to flame combustion can modulate the temperature and oxygen concentration during a fire, thereby slowing the spread of a fire, improving the efficiency of evaporation and firefighting, and reducing fire losses. Furthermore, in some industrial production and energy conversion processes, the addition of water vapor can improve the combustion process and enhance energy efficiency. For example, in coal-fired power plants, the addition of water vapor can lower the combustion temperature of coal, reduce flue gas emissions, and improve power generation efficiency. Adding water vapor during the combustion process can lower the combustion temperature and oxygen concentration, reduce the generation of harmful gases such as nitrogen oxides and carbon monoxide, and thus reduce the impact on the atmospheric environment. Studying the effect of water vapor on combustion is conducive to the development of new fire suppressants. By deeply understanding the mechanism of action of water vapor in fire, more efficient and environmentally friendly fire extinguishing agents can be designed to improve the effect of fire suppression and reduce fire losses.

[0003] Multi-source combustion refers to the simultaneous ignition of two or more adjacent fire sources. Compared to a single fire, the interaction between multiple fire sources will lead to different combustion behaviors. The interaction between fire sources, smoke flow, and temperature field changes are more complex, which places higher demands on fire simulation, prevention measures, and emergency response. When the distance between adjacent fire sources is relatively short, the flames may merge to form a larger flame, which will amplify the danger of the fire. At the same time, studying the dual-source combustion phenomenon can help scientists and engineers better understand the propagation mechanism of fire, optimize fire detection and alarm systems, design effective ventilation and smoke exhaust strategies, and formulate personnel evacuation and emergency rescue plans. Therefore, it is very necessary to study the flame characteristics of multiple fire sources.

[0004] Research on dual-source mixed-gas fires has made progress both theoretically and practically, but challenges remain. Previous devices often suffer from unstable evaporation of liquid into gas, long pipelines transporting the vaporized gas to the combustion site, and a lack of insulation, leading to condensation of the vaporized vapor and a reduction in the post-evaporation gas content. Furthermore, insufficient mixing of the two gases can lead to unstable combustion, resulting in significant experimental errors. Summary of the Invention

[0005] The purpose of the present invention is to overcome the above problems existing in the prior art and to provide a dual-fire source combustion experimental device capable of mixing aerated fluid.

[0006] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0007] A dual-fire source combustion experimental device capable of mixing aerated fluids is composed of two sets of fire source combustion experimental devices, the fire source combustion experimental devices including:

[0008] The first gas device includes a gas cylinder, a gas cylinder valve, a pressure gauge, a gas flow meter, and a first gas transportation pipeline that are connected in sequence, wherein the gas cylinder is used to store the first gas;

[0009] The second gas device includes a peristaltic pump, a liquid collecting pipe, a liquid flow meter, and a second gas transport pipeline connected in sequence. An electromagnetic heater is distributed in the front section of the second gas transport pipeline. The peristaltic pump is used to transport fluid, and the electromagnetic heater is used to heat and evaporate the fluid in the second gas transport pipeline to form a second gas.

[0010] The gas mixing device includes a mixed gas transport pipeline and a burner nozzle connected in sequence, wherein the mixed gas transport pipeline is connected to the second gas transport pipeline and the first gas transport pipeline respectively, and a temperature sensor is installed on the lower side of the burner nozzle, and the temperature sensor is used to detect whether the temperature of the mixed gas in the mixed gas transport pipeline is lower than the condensation temperature of the second gas;

[0011] The burner box device comprises a box and a burner holder installed on the outside of the box. The box is used to accommodate a mixed gas transport pipeline, and the burner holder is used to fix the burner nozzle.

[0012] Furthermore, the outer side of the rear section of the second gas transport pipeline is wrapped with an insulation layer.

[0013] Furthermore, the inner surface of the box is wrapped with heating and insulation wire.

[0014] Furthermore, a displacement platform is provided on the upper surface of the box body, and the burner holder is adjustably mounted on the displacement platform.

[0015] Furthermore, the burner holder includes a roller support shaft and sliding rollers installed at both ends of the roller support shaft.

[0016] Furthermore, the burner holder further includes bolts and nuts for fixing the position of the burner holder.

[0017] Furthermore, a spiral fan blade is installed at the front section of the mixed gas transportation pipeline to fully mix the first gas and the second gas.

[0018] Furthermore, the spiral fan blade includes a spiral fan blade motor and a spiral fan blade connection port arranged at the output end of the spiral fan blade motor. The spiral fan blade connection port is connected to the fan blade, and a hollow part is provided in the middle of the fan blade.

[0019] Furthermore, a scale parallel to the displacement platform is installed on the upper surface of the displacement platform.

[0020] Further, the operation method is as follows:

[0021] Step 1: Complete the installation of the dual-fire source combustion experimental device and fix the burner nozzle;

[0022] Step 2: Turn off the liquid flow meter, turn on the peristaltic pump to transport the liquid into the collecting pipe, and after reaching the predetermined scale, turn on the liquid flow meter and turn on the electromagnetic heater to heat and evaporate the liquid to form a second gas;

[0023] Step 3: Turn off the gas flow meter, open the gas cylinder valve of the gas storage cylinder, set the output pressure using the pressure gauge, then turn on the gas flow meter to deliver the gas to the first gas transportation pipeline as the first gas;

[0024] Step 4: Observe the temperature of the mixed gas through the temperature sensor. When the temperature of the mixed gas is higher than that of the second gas, water vapor, start recording experimental data.

[0025] The beneficial effects of the present invention are:

[0026] (1) The present invention meets the actual research needs by setting up dual fire sources and dual gas mixed combustion.

[0027] (2) The present invention uses a peristaltic pump to transport liquid to a liquid collecting pipe for heating and evaporation, and controls the flow rate of the evaporating fluid through a liquid flow meter to avoid the intermittent phenomenon of direct evaporation of the liquid flowing out of the peristaltic pump, which causes unstable delivery of the second gas.

[0028] (3) The present invention heats the liquid to evaporate and form a second gas by using an electromagnetic heater. The electromagnetic heater has high heating efficiency. At the same time, a heating insulation wire is arranged on the inner wall of the combustion box and an insulation layer is wrapped around the second gas transport pipeline behind the electromagnetic heater to achieve the purpose of insulation, prevent condensation of the fluid after vaporization, and reduce experimental errors.

[0029] (4) The present invention provides a spiral fan with hollow blades to fully mix the two gases while minimizing the influence of blade rotation on the flow rate, thereby avoiding unstable combustion.

[0030] (5) The present invention provides a burner displacement sliding device between the mixed gas transport pipeline and the displacement platform. The sliding device realizes the sliding between the burner and the displacement platform through a sliding roller. At the same time, the other end of the central axis of the sliding roller is fixed on the outside of the gas mixing pipeline. The synchronous movement of the experimental burner and the gas pipeline can reduce the friction caused by adjusting the distance between the two fire sources, making it more convenient to adjust the distance between the fire sources. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0032] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0033] Figure 2 It is a schematic diagram of the front view structure of the present invention;

[0034] Figure 3 It is a top view of the upper surface of the box;

[0035] Figure 4 It is the front view of the burner moving and fixing device;

[0036] Figure 5 It is the left side view of the burner moving and fixing device;

[0037] Figure 6 It is a schematic diagram of a spiral fan blade;

[0038] In the figure: 1. first gas device; 11. gas storage cylinder; 12. gas cylinder valve; 13. pressure gauge; 14. gas flow meter; 15. first gas transport pipeline; 2. second gas device; 21. peristaltic pump; 22. liquid collecting pipe; 23. liquid flow meter; 24. electromagnetic heater; 25. second gas transport pipeline; 26. thermal insulation layer; 3. burner box device; 31. box; 32. heating insulation wire; 33. displacement platform; 34. burner fixing device; 341. screw and nut; 35. scale; 36. sliding roller; 37. roller support shaft; 4. gas mixing device; 41. mixed gas transport pipeline; 42. spiral fan blade; 421. spiral fan blade motor; 422. spiral fan blade connection port; 423. fan blade; 424. hollow part; 43. temperature sensor; 44. burner nozzle. DETAILED DESCRIPTION

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0040] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0041] like Figure 1 The dual-fire source combustion experimental device for aerated fluid is shown, which is composed of two sets of fire source combustion experimental devices. The fire source combustion experimental devices include:

[0042] The first gas device 1 includes a gas cylinder 11, a gas cylinder valve 12, a pressure gauge 13, a gas flow meter 14, and a first gas transportation pipeline 15 connected in sequence. The gas cylinder 11 is used to store the first gas; the gas cylinder valve 12 and the gas flow meter 14 are opened and adjusted according to the reading of the pressure gauge 13, thereby controlling and adjusting the flow rate of the first gas output.

[0043] The second gas device 2 includes a peristaltic pump 21, a liquid collecting pipe 22, a liquid flow meter 23, and a second gas transport pipeline 25 connected in sequence. An electromagnetic heater 24 is distributed in the front section of the second gas transport pipeline 25. The peristaltic pump 21 is used to transport fluid, and the electromagnetic heater 24 is used to heat and evaporate the fluid in the second gas transport pipeline 25 at a set power to form a second gas; the peristaltic pump 21 transports the fluid to the liquid collecting pipe 22 for storage at the set power, and controls the fluid output flow rate through the liquid flow meter 23, and the flow rate output by the liquid flow meter remains stable.

[0044] The gas mixing device 4 includes a mixed gas transport pipeline 41 and a burner nozzle 44 connected in sequence. The mixed gas transport pipeline 41 is respectively connected to the second gas transport pipeline 25 and the first gas transport pipeline 15. A temperature sensor 43 is installed on the lower side of the burner nozzle 44. The temperature sensor 43 is used to detect whether the mixed gas temperature in the mixed gas transport pipeline 41 is lower than the condensation temperature of the second gas, so as to avoid the reduction of the second gas content due to condensation of the second gas during the experiment, thereby increasing the experimental error.

[0045] The burner box device 3 includes a box 31 and a burner holder 34 installed outside the box 31. The box 31 is used to accommodate the mixed gas transportation pipeline 41, and the burner holder 34 is used to fix the burner nozzle 44.

[0046] In order to keep warm, the outer side of the rear section of the second gas transport pipeline 25 is wrapped with an insulation layer 26, and the inner surface of the box 31 is wrapped with a heating insulation wire 32, so as to maintain the internal temperature of the box 31 stable and avoid condensation after gas evaporation, which leads to a decrease in the second gas content and an increase in experimental errors.

[0047] In order to adjust the position of the burner nozzle 44, a displacement platform 33 is provided on the upper surface of the box body 31, and the burner holder 34 is adjustably installed on the displacement platform 33. The burner holder 34 includes a roller support shaft 37 and sliding rollers 36 installed at both ends of the roller support shaft 37. The burner holder 34 also includes bolts and nuts 341 for fixing the position of the burner holder 34; the grooves provided inside the displacement platform 33 can control the distance between the two fire sources by adjusting the sliding roller 36 to meet the experimental conditions. The fixation of the bolts and nuts 341 can avoid changes in the distance between the two fire sources and irregular vibration of the fire sources during the experiment.

[0048] In order to fully mix, a spiral fan blade 42 is installed at the front end of the mixed gas transport pipeline 41, which is used to fully mix the first gas and the second gas to reduce experimental errors; the spiral fan blade 42 includes a spiral fan blade motor 421 and a spiral fan blade connection port 422 arranged at the output end of the spiral fan blade motor 421, the spiral fan blade connection port 422 is connected to the fan blade 423, and a hollow part 424 is provided in the middle of the fan blade 423.

[0049] For precise adjustment, a scale 35 parallel to the displacement platform 33 is mounted on the upper surface of the displacement platform 33 .

[0050] The following is a detailed description of the dual-fire source propane mixed with water vapor combustion experiment. The operation method is as follows:

[0051] Step 1: Complete the installation of the dual-fire source combustion experimental device and fix the burner nozzle 44. Install the burner nozzle 44 on the mixed gas transport pipeline 41. Move the sliding roller 36 within the displacement platform 33, refer to the scale 35 to determine the distance between the dual fire sources, and then fix it with the bolts and nuts 341 on the burner holder 34.

[0052] Step 2: Close the liquid flow meter 23, open the peristaltic pump 21 to deliver pure water to the liquid collection pipe 22, and after reaching a predetermined scale, open the liquid flow meter 23 and simultaneously turn on the electromagnetic heater 24 to heat and evaporate the liquid to form a second gas;

[0053] Step 3: Close the gas flow meter 14, open the cylinder valve 12 of the propane cylinder 11, set a suitable propane output pressure using the pressure gauge 13, then open the gas flow meter 14 and deliver the propane to the first gas transportation pipeline 15 as the first gas;

[0054] Step 4: Turn on the spiral fan blades 42 to fully mix the first gas propane and the second gas water vapor. At the same time, turn on the heating insulation wire 32 inside the box to maintain a constant temperature inside the box to prevent the second gas water vapor from condensing and causing the second gas content to decrease, resulting in a large experimental error. The temperature of the mixed gas is observed by the temperature sensor 43. When the temperature of the mixed gas is higher than that of the second gas water vapor, the second gas water vapor does not condense, and the experimental data is recorded. Different test conditions can be set by adjusting the sliding roller 36 to set the distance between the two fire sources, adjusting the size of the gas flowmeter to set the flow rate of the first gas propane, and adjusting the size of the liquid flowmeter to set the flow rate of the second gas water vapor.

[0055] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0056] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the invention as claimed.

Claims

1. A dual-fire source combustion experimental device capable of mixing aerated fluid, characterized in that: It consists of two sets of fire source combustion experimental devices, which include: A first gas device (1) comprises a gas storage cylinder (11), a gas cylinder valve (12), a pressure gauge (13), a gas flow meter (14), and a first gas transport pipeline (15) which are connected in sequence, wherein the gas storage cylinder (11) is used to store the first gas; The second gas device (2) comprises a peristaltic pump (21), a liquid collecting pipe (22), a liquid flow meter (23), and a second gas transport pipeline (25) which are connected in sequence. An electromagnetic heater (24) is distributed at the front section of the second gas transport pipeline (25). The peristaltic pump (21) is used to transport the fluid. The electromagnetic heater (24) is used to heat and evaporate the fluid in the second gas transport pipeline (25) to form a second gas. The rear section of the second gas transport pipeline (25) is wrapped with an insulation layer (26). A gas mixing device (4) comprises a mixed gas transport pipeline (41) and a burner nozzle (44) connected in sequence, wherein the mixed gas transport pipeline (41) is connected to the second gas transport pipeline (25) and the first gas transport pipeline (15) respectively, and a temperature sensor (43) is installed on the lower side of the burner nozzle (44), and the temperature sensor (43) is used to detect whether the temperature of the mixed gas in the mixed gas transport pipeline (41) is lower than the condensation temperature of the second gas; a spiral fan blade (42) is installed at the front section of the mixed gas transport pipeline (41) for fully mixing the first gas and the second gas; A burner box device (3) comprises a box (31) and a burner holder (34) mounted on the outside of the box (31), wherein the box (31) is used to accommodate a mixed gas transport pipeline (41), and the burner holder (34) is used to fix a burner nozzle (44); a heating and heat-insulating wire (32) is wound around the inner surface of the box (31); a displacement platform (33) is provided on the upper surface of the box (31), and the burner holder (34) is adjustably mounted on the displacement platform (33).

2. The dual-fire source combustion experimental device for aerated fluid according to claim 1, characterized in that: The burner holder (34) includes a roller support shaft (37) and sliding rollers (36) installed at both ends of the roller support shaft (37).

3. The dual-fire source combustion experimental device for aerated fluid according to claim 2, characterized in that: The burner holder (34) further includes a bolt nut (341) for fixing the position of the burner holder (34).

4. The dual-fire source combustion experimental device for aerated fluid according to claim 3, characterized in that: The spiral fan blade (42) comprises a spiral fan blade motor (421) and a spiral fan blade connection port (422) arranged at the output end of the spiral fan blade motor (421); the spiral fan blade connection port (422) is connected to a fan blade (423); and a hollow portion (424) is provided in the middle of the fan blade (423).

5. The dual-fire source combustion experimental device for aerated fluid according to claim 4, characterized in that: A scale (35) parallel to the displacement platform (33) is installed on the upper surface of the displacement platform (33).

6. A dual-fire source combustion experimental device for aerated fluid according to any one of claims 1 to 5, characterized in that: Here’s how to do it: Step 1: Complete the installation of the dual-fire source combustion experimental device and fix the burner nozzle (44); Step 2: Close the liquid flow meter (23), open the peristaltic pump (21) to transport the liquid into the liquid collecting pipe (22), and after reaching a predetermined scale, open the liquid flow meter (23) and simultaneously turn on the electromagnetic heater (24) to heat and evaporate the liquid to form a second gas; Step 3: Turn off the gas flow meter (14), open the gas cylinder valve (12) of the gas storage cylinder (11), set the output pressure through the pressure gauge (13), and then turn on the gas flow meter (14) to transport the gas to the first gas transportation pipeline (15) as the first gas; Step 4: Observe the temperature of the mixed gas through the temperature sensor (43), and start recording experimental data when the temperature of the mixed gas is higher than the second gas water vapor.

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