A porous media combustion heating apparatus

Abstract

The utility model provides a kind of porous medium combustion heating device, including the combustion cylinder body with central air-fuel gas mixing cavity, central air distribution pipe with bottom sealing is equipped, its part in combustion cylinder body is evenly distributed air injection hole, its part exposed combustion cylinder body top is surrounded gas distribution chamber, its side portion is equipped with gas connector, the cavity between combustion cylinder body combustion surrounding wall and air distribution pipe is evenly spaced with gas distribution pipe along circumference, it is connected with gas distribution chamber, its lateral wall is evenly spaced with gas lance along axial direction, it is coaxially arranged corresponding with the mixed gas hole on combustion surrounding wall, air-fuel mixture enters annular silicon carbide porous panel in combustion cylinder body, and high-temperature radiation surface is formed by ignition, the utility model forms uniform high-temperature radiation surface by silicon carbide annular porous panel surface, combustion process is more rapid, uniform, stable, with very high combustion efficiency and very low pollutant emission.

Description

Technical Field

[0001] This application relates to the technical field of gas combustion, and more specifically, to a porous medium combustion heating device. Background Technology

[0002] Porous media combustion technology is a brand-new third-generation gas combustion technology. It is a gas combustion technology in which fuel and combustion air are rapidly and evenly combusted on the surface of a porous media panel and within the disordered pores to form a uniform high-temperature radiation surface and maximize enthalpy. It has outstanding features such as ultra-enthalpy flameless combustion, outstanding energy-saving and environmental protection benefits, and small equipment size. It is known as the revolutionary gas combustion technology of the 21st century.

[0003] Porous media combustion heating devices offer advantages such as a large combustion surface area, balanced air-fuel mixture distribution, and rapid combustion speed. The gas flow within the porous media panel generates intense disturbances such as vortices, splitting, and merging, resulting in more complete and uniform combustion. The high-temperature rear of the porous media panel heats the low-temperature front, accelerating the combustion speed and increasing the combustion rate. It has wide applications and excellent baking effects for refractory linings in dry pots, ladles (intermediate ladles), and tanks, as well as for drying strip coatings and baking planar layers in light industry and chemical industries such as food, papermaking, and printing and dyeing. Baking is characterized by rapid temperature rise, good temperature uniformity, and extremely low pollutant generation. Porous media combustion heating devices represent a crucial entry point for related industries to achieve industrial technology upgrades, optimize product structures, develop high-end products, and improve quality and efficiency. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a porous medium combustion heating device that rapidly burns on the surface and in the pores of a silicon carbide annular porous panel and forms a uniform high-temperature radiation surface.

[0005] The embodiments of this application are implemented as follows: This application provides a porous medium combustion heating device, characterized in that it includes a combustion cylinder with a central air-fuel mixing chamber. The combustion cylinder includes a top plate, a bottom plate, and a combustion enclosure wall. A bottom-sealed air distribution pipe is provided through the center. The portion of the air distribution pipe inside the combustion cylinder has evenly distributed air injection holes. The portion of the air distribution pipe exposed at the top of the combustion cylinder surrounds a gas distribution chamber. A gas pipe is provided on the side of the gas distribution chamber. Gas distribution pipes are evenly spaced circumferentially in the cavity between the combustion enclosure wall and the air distribution pipe. The top end of the gas distribution pipe is connected to the gas distribution chamber. Gas injection pipes are evenly spaced axially on the side wall of the gas distribution pipe, and are coaxially arranged corresponding to the mixing holes provided on the combustion enclosure wall. The mixing holes are connected to the central air-fuel mixing chamber.

[0006] In some alternative embodiments, the combustion enclosure includes an inner wall and an outer shell that are fitted together, wherein the inner wall is cast from a refractory material and the outer shell is an annular porous silicon carbide panel.

[0007] In some alternative implementations, one end of the gas nozzle is provided with an external thread, which is configured to be threaded into the threaded hole of the gas distribution pipe, and the other end is a square tube structure with a gas nozzle at the center of the four sides of the end.

[0008] In some alternative embodiments, the mixing pore is a radially extending circular hole with a tapered hole at the outer end that gradually widens in inner diameter.

[0009] In some alternative implementations, the base plate is a disc structure with openings corresponding to the positions of the air distribution pipe and the gas distribution pipe, and is sealed to the air distribution pipe and the gas distribution pipe.

[0010] In some alternative implementations, the gas distribution pipe has a throttling orifice plate at the top end and a pipe plug at the bottom end.

[0011] In some alternative implementations, the annular silicon carbide porous panel is formed by splicing together multiple arc-shaped silicon carbide porous panels, and the outer edge of the base plate is provided with an upward convex ring to limit and stop the annular silicon carbide porous panel.

[0012] In some alternative implementations, the base plate is provided with an arc-shaped opening, the arc-shaped opening being configured with the size of the arc-shaped silicon carbide porous panel, and a sealing component is provided on the bottom surface of the base plate corresponding to the position of the arc-shaped opening.

[0013] In some alternative embodiments, the sealing assembly includes a sealing plate and connecting screws. The sealing plate includes a base plate and an arc-shaped protrusion. The arc-shaped protrusion is located at the center of the top surface of the base plate and is configured to engage with the arc-shaped opening. The connecting screws are arranged along the portion of the base plate that is in contact with the bottom plate to connect the base plate and the bottom plate.

[0014] The beneficial effects of this application are as follows: 1. The porous medium combustion heating device provided by this application achieves preliminary uniform distribution of air and gas through the setting of air distribution pipe and circumferentially surrounding gas distribution pipe. Then, through the full mixing of air and gas in the mixing holes, and the uniform distribution through the annular silicon carbide porous panel, the combustion process of the mixed gas is faster, more uniform, and more stable, with extremely high combustion efficiency and extremely low pollutant emissions; 2. The annular silicon carbide porous panel is a multi-piece splicing structure, which matches the arc-shaped opening on the base plate to realize the replacement and installation of the arc-shaped silicon carbide porous panel, which facilitates the daily maintenance of the combustion heating device and reduces maintenance costs. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a cross-sectional view of the porous medium combustion heating device according to an embodiment of this application; Figure 2 This is a schematic diagram of the structure of the gas nozzle according to an embodiment of this application; Figures 3-5 This is a schematic diagram of the structure of the base plate in an embodiment of this application; Figure 6 This is a schematic diagram of the structure of the combustion enclosure according to an embodiment of this application. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0018] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0019] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0020] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] The features and performance of this application will be further described in detail below with reference to the embodiments.

[0022] like Figure 1 As shown, this application proposes a porous medium combustion heating device, including a combustion cylinder with a central air-fuel mixing chamber. The combustion cylinder includes a top plate 1, a bottom plate 2, and a combustion enclosure 3. A bottom-sealed air distribution pipe 4 is provided through the center. The portion of the air distribution pipe inside the combustion cylinder is evenly distributed with air injection holes 5, the hole diameter of which is preferably 6-10 mm. The portion of the air distribution pipe protruding from the top of the combustion cylinder surrounds a gas distribution chamber 6. A gas connection pipe 7 is provided on the side of the gas distribution chamber. Gas distribution pipes 8 are evenly spaced circumferentially in the cavity between the combustion enclosure and the air distribution pipe. The top end of the gas distribution pipe is connected to the gas distribution chamber. Gas injection pipes 9 are evenly spaced axially on the side wall of the gas distribution pipe, which, together with the mixing holes 10 provided on the combustion enclosure (see... Figure 6 Correspondingly, the mixing pores are coaxially arranged and connected to the central air-fuel mixing chamber.

[0023] The combustion enclosure includes an inner wall 301 and an outer shell 302, which are fitted together. The inner wall is made of cast refractory material, and the outer shell is an annular porous silicon carbide panel. The inner wall is provided with mixing pores, which are radially extending circular holes with tapered holes at the outer ends that gradually widen in inner diameter. The diameter of the straight holes is 12-20 mm, and the diameter of the tapered holes is 1.8-2.2 times the diameter of the straight holes.

[0024] The air-fuel mixture is ejected from the mixing holes and evenly distributed throughout the annular silicon carbide porous panel via multi-layered disordered pores. An ignition device located on the outside of the annular silicon carbide porous panel ignites the premixed air-fuel mixture, resulting in rapid and complete combustion on the surface and within the pores of the panel, forming a uniform high-temperature radiant surface. The presence of the annular silicon carbide porous panel makes the combustion process faster, more uniform, and more stable, resulting in extremely high combustion efficiency and extremely low pollutant emissions.

[0025] like Figure 2 As shown, one end of the gas nozzle has an external thread 901, which is threaded to the threaded hole of the gas distribution pipe. The other end has a square tube structure 902, with a gas nozzle 903 at the center of each of the four sides. The nozzle diameter is 0.8–2.0 mm. Gas is ejected from the gas distribution pipe through the gas nozzle, mixes with the air entering the mixing hole, and then enters the annular silicon carbide porous panel.

[0026] Example 1 like Figures 3-5 As shown, the annular silicon carbide porous panel is formed by splicing together multiple arc-shaped silicon carbide porous panels. The outer edge of the base plate is provided with an upward-facing convex ring 201, which forms a limiting stop for the annular silicon carbide porous panel.

[0027] The base plate has an arc-shaped opening 202, the size of which is matched to the arc-shaped silicon carbide porous panel. A sealing component is located on the bottom surface of the base plate corresponding to the position of the arc-shaped opening. When a piece of arc-shaped silicon carbide porous panel is damaged, the annular silicon carbide porous panel can be rotated so that the arc-shaped silicon carbide porous panel to be replaced is facing the arc-shaped opening. The sealing component is opened, and the arc-shaped silicon carbide porous panel to be replaced is removed from the bottom of the arc-shaped opening. The new arc-shaped silicon carbide porous panel is inserted from the bottom of the arc-shaped opening, and then the arc-shaped silicon carbide porous panel is rotated to offset its position from the arc-shaped opening. Finally, the sealing component is connected and sealed to complete the replacement.

[0028] Furthermore, the sealing assembly includes a sealing support plate 203 and connecting screws 204. The sealing support plate includes a base plate and an arc-shaped protrusion. The arc-shaped protrusion is located at the center of the top surface of the base plate and engages with the arc-shaped opening. The connecting screws are arranged along the contact portion between the base plate and the bottom plate, connecting the base plate and the bottom plate. The connecting screws enable a detachable sealing assembly, facilitating the replacement of the annular silicon carbide porous panel.

[0029] Example 2 In this embodiment, the base plate is a disc structure, with openings corresponding to the positions of the air distribution pipe and the gas distribution pipe, and is sealed to the air distribution pipe and the gas distribution pipe.

[0030] Furthermore, the top end of the gas distribution pipe is provided with a throttling orifice plate 205, and the bottom end is provided with a pipe plug 206.

[0031] The gas flow rate entering each branch gas distribution pipe is balanced by a throttling orifice plate, and the bottom pipe plug can be pulled out for drainage and purging.

[0032] When this heating device is in use, the gas enters the gas distribution chamber through the gas pipe, is evenly distributed into the gas distribution pipe through the throttling orifice plate, and is then further distributed into the gas nozzle and ejected from the gas nozzle. Air enters the air distribution pipe, is evenly distributed to the combustion cylinder through the air injection holes, and the gas ejected from the gas nozzle is evenly mixed with the air distributed from the mixing holes and evenly distributed into the annular silicon carbide porous panel. It is then evenly distributed throughout the entire porous panel through multiple layers of disordered holes. The premixed air-gas mixture is ignited by an ignition device located outside the annular silicon carbide porous panel, and the mixture burns rapidly on the surface and within the pores of the annular silicon carbide porous panel, forming a uniform high-temperature radiant surface.

Claims

1. A porous medium combustion heating device, characterized in that, The combustion chamber includes a combustion cylinder with a central air-fuel mixing chamber. The combustion cylinder includes a top plate, a bottom plate, and a combustion wall. A bottom-sealed air distribution pipe runs through the center. Air injection holes are evenly distributed on the portion of the air distribution pipe inside the combustion cylinder. A gas distribution chamber is enclosed on the portion of the air distribution pipe protruding from the top of the combustion cylinder. A gas pipe is provided on the side of the gas distribution chamber. Gas distribution pipes are evenly spaced circumferentially in the cavity between the combustion wall and the air distribution pipe. The top end of the gas distribution pipe is connected to the gas distribution chamber. Gas injection pipes are evenly spaced axially on the side wall of the gas distribution pipe and are coaxially arranged corresponding to the mixing holes provided on the combustion wall. The mixing holes are connected to the central air-fuel mixing chamber.

2. The porous medium combustion heating device according to claim 1, characterized in that, The combustion enclosure includes an inner wall and an outer shell that are fitted together. The inner wall is made of refractory material and the outer shell is a ring-shaped porous silicon carbide panel.

3. The porous medium combustion heating device according to claim 2, characterized in that, One end of the gas injection pipe is provided with an external thread, which is configured to be screwed into the threaded hole of the gas distribution pipe. The other end is a square tube structure, and a gas nozzle is provided at the center of the four sides of the end.

4. A porous medium combustion heating device according to claim 2 or 3, characterized in that, The mixing pores are radially extending circular holes with tapered holes at the outer ends that gradually increase in inner diameter.

5. The porous medium combustion heating device according to claim 4, characterized in that, The base plate is a disc structure, with openings corresponding to the positions of the air distribution pipe and the gas distribution pipe, and is sealed to the air distribution pipe and the gas distribution pipe.

6. A porous medium combustion heating device according to claim 1 or 5, characterized in that, The gas distribution pipe is equipped with a throttling orifice plate at the top end and a pipe plug at the bottom end.

7. The porous medium combustion heating device according to claim 5, characterized in that, The annular silicon carbide porous panel is formed by splicing together multiple arc-shaped silicon carbide porous panels. The outer edge of the base plate is provided with an upward convex ring, which forms a limiting stop for the annular silicon carbide porous panel.

8. The porous medium combustion heating device according to claim 7, characterized in that, The base plate is provided with an arc-shaped opening, the arc-shaped opening is configured with the size of the arc-shaped silicon carbide porous panel, and a sealing component is provided on the bottom surface of the base plate corresponding to the position of the arc-shaped opening.

9. A porous medium combustion heating device according to claim 8, characterized in that, The sealing assembly includes a sealing plate and connecting screws. The sealing plate includes a base plate and an arc-shaped protrusion. The arc-shaped protrusion is located at the center of the top surface of the base plate and is configured to engage with the arc-shaped opening. The connecting screws are arranged along the part of the base plate that is in contact with the bottom plate to connect the base plate and the bottom plate.

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