An experimental ordered porous media combustor

Abstract

The application discloses an experimental ordered porous medium combustor, which comprises a body, an ordered porous medium body, optical detection instruments and a plurality of thermocouple rods, the body is provided with a premixing chamber and a combustion chamber which are sequentially communicated, the premixing chamber is provided with an air inlet, one of opposite two side walls of the combustion chamber is provided with a detection window, and the other of opposite two side walls of the combustion chamber is uniformly provided with a plurality of detection holes; the ordered porous medium body is filled in the combustion chamber; the optical detection instruments comprise a detection emitter and a detection receiver which are arranged outside two detection windows in opposition; and the thermocouple rods are inserted into the ordered porous medium body through the detection holes. The ordered porous medium is used as the filling material, better gas flowability and combustion effect can be provided, the combustion condition in the ordered porous medium body can be monitored in real time, and accurate combustion data can be provided.

Description

Technical Field

[0001] This invention relates to the field of burner technology, and in particular to an experimental ordered porous medium burner. Background Technology

[0002] Porous media combustion is a combustion method that utilizes porous media materials. Compared to free-space combustion, porous media combustion has advantages such as high power density, wide adjustment range, low pollutant emissions, and compact structure.

[0003] Due to the excellent combustion properties of porous media, numerous research projects on burners based on porous media materials are currently underway in the laboratory. Traditional porous media burners are mostly filled with disordered foam ceramics or randomly stacked spherical structures. This makes it impossible to place probes inside the burner during experiments; data can only be obtained from the surface region of the porous media, making it difficult to obtain data from the internal regions. However, obtaining information on the temperature field and contaminant generation within the porous media region in the laboratory is crucial for analyzing the combustion characteristics of various fuels.

[0004] Therefore, it is necessary to redesign porous media burners to allow for probe placement and data acquisition of internal regions without damaging the porous media material. This will facilitate in-depth research into temperature and contaminant distribution during porous media combustion, leading to a better understanding of the combustion characteristics of various fuels. Summary of the Invention

[0005] The purpose of this invention is to provide an experimental ordered porous media burner to solve one or more technical problems existing in the prior art, and at least provide a beneficial option or create conditions.

[0006] The technical solution adopted to solve the above-mentioned technical problems is as follows:

[0007] This invention provides an experimental ordered porous media burner, comprising: a body having a premixing chamber and a combustion chamber connected in sequence, the premixing chamber having an air inlet, one of the opposite side walls of the combustion chamber having a detection window, and the other opposite side walls of the combustion chamber having a plurality of detection holes; an ordered porous media filling the combustion chamber; an optical detection instrument including a detection transmitter and a detection receiver disposed opposite to each other outside the two detection windows; and multiple thermocouple rods, the thermocouple rods extending into the ordered porous media through the detection holes.

[0008] The beneficial effects of this invention are as follows: In use, the gas required for the experiment enters the premixing chamber through the air inlet and is mixed. Then, the mixed gas enters the ordered porous medium in the combustion chamber for combustion. The thermocouple rod extends into any desired position inside the ordered porous medium through the corresponding detection hole to detect the temperature. The setting of detection windows on both sides allows the ordered porous medium inside the combustion chamber to be detected by the corresponding detection transmitter and detection receiver. The detection light can pass through the pores inside the ordered porous medium without blocking the connection of the light path.

[0009] Using ordered porous media as the filler in porous media burners allows for more convenient design and manufacturing of corresponding porous media according to different application requirements (such as PPI, porosity, etc.). The overall structure makes the PPI, porosity, and other properties of the porous media material more uniformly distributed, making it easier to predict and control the airflow distribution inside the combustion chamber. Combined with temperature and pollutant distribution data, the combustion mechanism of fuel inside the porous media can be better explained. Measurement points can be arranged in any space inside the porous media, making it more convenient to use contact temperature measurement methods such as thermocouples and resistance thermometers.

[0010] As a further improvement to the above technical solution, the premixing chamber includes a primary premixing chamber and a secondary premixing chamber connected in sequence, and the primary premixing chamber, the secondary premixing chamber, and the combustion chamber are arranged sequentially from bottom to top.

[0011] The gas first enters the primary premixing chamber for primary mixing, then enters the secondary premixing chamber for secondary mixing, and finally enters the combustion chamber.

[0012] As a further improvement to the above technical solution, several air inlets are evenly distributed around the primary premixing chamber.

[0013] Gas enters the primary premixing chamber through multiple inlets to achieve counter-mixing.

[0014] As a further improvement to the above technical solution, a first perforated plate is provided between the primary premixing chamber and the secondary premixing chamber, and a second perforated plate is provided between the secondary premixing chamber and the combustion chamber.

[0015] As a further improvement to the above technical solution, a number of steel balls are filled in the secondary premixing chamber. The steel balls increase the spatial complexity and further mix the gases.

[0016] As a further improvement to the above technical solution, a support frame is also included. The support frame is installed on the outside of the combustion chamber and has several insertion holes corresponding to the detection holes. The thermocouple rod is inserted into the insertion holes.

[0017] This solution uses a support frame to hold and install the thermocouple rod.

[0018] As a further improvement to the above technical solution, the body includes a combustion shell, a premixed shell, and a support plate disposed between the combustion shell and the premixed shell. The combustion chamber is disposed inside the combustion shell, and the premixed chamber is disposed inside the premixed shell.

[0019] As a further improvement to the above technical solution, the combustion shell includes two opposite perforated side plates and two viewing window side plates disposed between the two perforated side plates, and the detection viewing window is disposed on the viewing window side plate.

[0020] As a further improvement to the above technical solution, the detection window extends vertically and is located in the middle of the side panel of the window, and the detection window is covered by sapphire glass. This results in a larger detection range.

[0021] As a further improvement to the above technical solution, the ordered porous medium has a matrix arrangement structure. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0023] Figure 1 This is a schematic diagram of an embodiment of the experimental ordered porous media burner provided by the present invention;

[0024] Figure 2 This is a schematic diagram of an embodiment of the ordered porous medium provided by the present invention. Detailed Implementation

[0025] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0026] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0027] In the description of this invention, if there are words such as "several", they mean one or more, "multiple" means two or more, "greater than", "less than", "exceeding" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself.

[0028] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0029] Reference Figures 1-2 The experimental ordered porous media burner of the present invention is illustrated in the following embodiments:

[0030] The experimental ordered porous media burner of this embodiment includes a body 100, an ordered porous media body 200, an optical detection instrument, and a thermocouple rod 400.

[0031] The main body 100 includes a combustion shell 160 and a premix shell 170 arranged vertically, and a support plate 180 is provided between the combustion shell 160 and the premix shell 170.

[0032] A combustion chamber 120 is provided inside the combustion shell 160, and a premixing chamber is provided inside the premixing shell 170. The premixing chamber is connected to the combustion chamber 120, and an air inlet 130 is provided on the side wall of the premixing chamber.

[0033] The combustion shell 160 has detection windows 140 on one of its opposite side walls, and the combustion chamber 120 has a plurality of detection holes 150 evenly distributed on the other opposite side walls. In this embodiment, the plurality of detection holes 150 are arranged vertically at intervals.

[0034] The ordered porous medium 200 is filled in the combustion chamber 120, and a regular porous structure is formed inside the ordered porous medium 200. In this embodiment, the ordered porous medium 200 is arranged in a matrix structure. In other embodiments, other regular structural arrangements can also be selected.

[0035] The porous media material can be ceramic, composite material or metal material, etc. The pore size and porosity of the porous media are adjusted according to different needs to provide different combustion effects.

[0036] In this embodiment, multiple thermocouple rods 400 are provided, and the thermocouple rods 400 can extend into the interior of the ordered porous medium 200 through the detection hole 150.

[0037] The optical inspection instrument includes a detection transmitter 300 and a detection receiver 310, which are positioned opposite each other on the outside of two detection windows 140.

[0038] In use, the gas required for the experiment enters the premixing chamber through the inlet 130 for mixing. The mixed gas then enters the ordered porous medium 200 in the combustion chamber 120 for combustion. Thermocouple rod 400 extends through the corresponding detection hole 150 to any desired position inside the ordered porous medium 200 for temperature detection. The setting of detection windows 140 on both sides allows the ordered porous medium 200 inside the combustion chamber 120 to be detected by the corresponding detection transmitter 300 and detection receiver 310. The detection light can pass through the pores inside the ordered porous medium 200 without obstructing the connection of the light path.

[0039] Using ordered porous media 200 as the filler for porous media burners allows for more convenient design and manufacturing of corresponding porous media according to different usage requirements such as PPI and porosity. In terms of overall structure, the PPI and porosity of the porous media material are more uniformly distributed, making it easier to predict and control the airflow distribution inside the combustion chamber 120. Combined with temperature distribution and pollutant distribution data, the combustion mechanism of fuel inside the porous media can be better explained. Measurement points can be arranged in any space inside the porous media, making it more convenient to use contact temperature measurement methods such as thermocouples and resistance thermometers.

[0040] Specifically, the combustion shell 160 includes two perforated side plates 161 disposed opposite to each other and two viewing window side plates 162 disposed between the two perforated side plates 161, wherein the detection viewing window 140 is disposed on the viewing window side plate 162.

[0041] The detection window 140 extends vertically and is located in the middle of the window side panel 162. The detection window 140 covers the sapphire glass 141, thus expanding the detection range.

[0042] The window side panel 162 includes two spliced ​​side panels, which are connected to the sapphire glass 141 through a concave-convex structure to form a whole.

[0043] The premixing chamber of this embodiment includes a primary premixing chamber 500 and a secondary premixing chamber 600 connected in sequence. The primary premixing chamber 500, the secondary premixing chamber 600, and the combustion chamber 120 are arranged sequentially from bottom to top. The gas first enters the primary premixing chamber 500 for primary mixing, then enters the secondary premixing chamber 600 for secondary mixing, and then enters the combustion chamber 120.

[0044] Several air inlets 130 are evenly distributed around the primary premixing chamber 500. Gas enters the primary premixing chamber 500 through multiple air inlets 130 to achieve counter-mixing.

[0045] Furthermore, a first perforated plate 510 is provided between the primary premixing chamber 500 and the secondary premixing chamber 600, and a second perforated plate 610 is provided between the secondary premixing chamber 600 and the combustion chamber 120. The secondary premixing chamber 600 is filled with a plurality of steel balls. The steel balls increase the spatial complexity and further mix the gases.

[0046] This embodiment also includes a support frame 700, which is installed on the outside of the combustion chamber 120. The support frame 700 is provided with a plurality of insertion holes 710 corresponding to the detection hole 150. The thermocouple rod 400 is inserted into the insertion holes 710, and the thermocouple rod 400 is supported and installed by the support frame 700.

[0047] By using the detection window 140 with sapphire glass on both sides, it is easier to use an infrared thermal imager to photograph the side of the porous medium material in the combustion chamber 120 and obtain a temperature distribution cloud map of the side of the porous medium material.

[0048] This invention uses an ordered porous medium as the filling material, which provides better prediction of gas flow and combustion performance. The combustion status inside the porous medium is monitored in real time through the perforated side plate 161 and the viewing window side plate 162, providing accurate combustion data. The size of the side detection hole 150 and the size of the detection window 140 can be changed according to different measurement requirements.

[0049] This invention has the advantages of simple structure, stability and reliability, and ease of use, and can be widely used in laboratory combustion reaction research and industrial combustion device design.

[0050] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. An experimental ordered porous media burner, characterized in that: include: The main body (100) is provided with a premixing chamber and a combustion chamber (120) connected in sequence. The premixing chamber is provided with an air inlet (130). The combustion chamber (120) is provided with detection windows (140) on one of its opposite side walls. The other opposite side walls of the combustion chamber (120) are provided with a number of detection holes (150). An ordered porous medium (200) is filled in the combustion chamber (120); An optical inspection instrument comprising an inspection transmitter (300) and an inspection receiver (310) disposed opposite to each other outside the two inspection windows (140). Multiple thermocouple rods (400) are provided, and the thermocouple rods (400) extend into the interior of the ordered porous medium (200) through the detection hole (150); It also includes a support frame (700), which is installed on the outside of the combustion chamber (120). The support frame (700) is provided with a plurality of insertion holes (710) corresponding to the detection hole (150), and the thermocouple rod (400) is inserted into the insertion hole (710). The main body (100) includes a combustion shell (160), a premix shell (170), and a support plate (180) disposed between the combustion shell (160) and the premix shell (170). The combustion chamber (120) is disposed inside the combustion shell (160), and the premix chamber is disposed inside the premix shell (170). The combustion shell (160) includes two opposite perforated side plates (161) and two window side plates (162) disposed between the two perforated side plates (161), and the detection window (140) is disposed on the window side plate (162). The detection window (140) extends vertically and is located in the middle of the window side panel (162), and the detection window (140) is covered by sapphire glass (141). The ordered porous medium (200) has a matrix arrangement structure.

2. The experimental ordered porous media burner according to claim 1, characterized in that: The premixing chamber includes a primary premixing chamber (500) and a secondary premixing chamber (600) connected in sequence, and the primary premixing chamber (500), the secondary premixing chamber (600), and the combustion chamber (120) are arranged from bottom to top.

3. The experimental ordered porous media burner according to claim 2, characterized in that: Several air inlets (130) are evenly distributed around the primary premix chamber (500).

4. The experimental ordered porous media burner according to claim 2, characterized in that: A first perforated plate (510) is provided between the primary premixing chamber (500) and the secondary premixing chamber (600), and a second perforated plate (610) is provided between the secondary premixing chamber (600) and the combustion chamber (120).

5. The experimental ordered porous media burner according to claim 4, characterized in that: The secondary premixing chamber (600) is filled with a number of steel balls.

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