Air intake device and combustion furnace

Abstract

The application discloses an air inlet device and a combustion furnace. The air inlet device is configured to supply air to the interior of the combustion furnace. The air inlet device comprises a sleeve, a blocking piece and an air inlet piece. The sleeve is connected to the furnace wall of the combustion furnace and penetrates the furnace wall. One of the blocking piece and the air inlet piece is inserted into the sleeve. The blocking piece is configured to block the sleeve, and the air inlet piece is configured to supply external air to the interior of the combustion furnace. When the blocking piece is inserted into the sleeve, the interior of the combustion furnace is isolated from the outside, the sealing performance of the combustion furnace is ensured, and the reaction effect in the furnace is improved. The air inlet piece is inserted into the sleeve, the air inlet piece is connected to an external air supply device, and the air inlet piece supplies the required air to the interior of the combustion furnace, which is beneficial to the full occurrence of the reaction in the furnace and improves the purity of the reaction product in the furnace. The blocking piece and the air inlet piece are easy to disassemble and assemble, which is beneficial to improving the work efficiency.

Description

Technical Field

[0001] This application relates to the field of combustion furnace technology, and in particular to an air intake device and a combustion furnace. Background Technology

[0002] In smelting production, smelting slag is generated, which is a type of industrial solid waste. With the development of production, solid waste is increasing year by year, and its treatment is an urgent problem to be solved. In existing technologies, smelting slag is mainly added to a combustion furnace after being mixed with other raw materials (such as silica, coke, etc.) in a certain proportion. Under high temperature, the iron and silicon elements in the smelting slag are simultaneously reduced by carbon, and the silicon element in silicon dioxide is also reduced by carbon to produce alloy steel. However, the alloy steel produced by this method has low quality and relatively high production cost.

[0003] Therefore, improvements to existing technologies are necessary. Utility Model Content

[0004] This application aims to solve at least one of the technical problems existing in the prior art by providing an air intake device and a combustion furnace.

[0005] According to one aspect of this application, an air intake device is provided, configured to introduce air into a combustion furnace. The air intake device includes a sleeve, a blocking element, and an air intake element. The sleeve is connected to the furnace wall of the combustion furnace and penetrates the furnace wall. One of the blocking element and the air intake element is inserted into the sleeve. The blocking element is configured to block the sleeve, and the air intake element is configured to deliver external gas into the combustion furnace.

[0006] In one embodiment, the air intake component is provided with an air intake hole, which is divided into a first hole segment, a second hole segment, and a third hole segment along the axial direction of the air intake component. The third hole segment is located at the air intake end of the air intake component. The diameter of the second hole segment is larger than the diameter of the first hole segment and smaller than the diameter of the third hole segment.

[0007] In one embodiment, the diameter of the first hole segment is d, which satisfies: 0.5 mm ≤ d ≤ 1 mm.

[0008] In one embodiment, a transition section is provided between the first hole segment and the second hole segment, and the diameter of the transition section gradually decreases in the direction from the second hole segment to the first hole segment.

[0009] In one embodiment, the air intake component includes a mounting portion and an air intake portion, the air intake portion being disposed at the end of the mounting portion near the interior of the combustion furnace; the mounting portion is screwed to the sleeve, and the air intake portion is detachably connected to the mounting portion.

[0010] In one embodiment, the sleeve is provided with a mounting hole, which is divided into a fourth hole segment and a fifth hole segment along the axial direction of the sleeve. The fourth hole segment is located at the end of the fifth hole segment near the interior of the combustion furnace. The diameter of the fourth hole segment is smaller than the diameter of the fifth hole segment.

[0011] In one embodiment, the plugging member is sequentially divided into a first plugging section, a second plugging section, and a third plugging section along its axial direction. The first plugging section is disposed at one end of the second plugging section near the interior of the combustion furnace. The diameter of the second plugging section is larger than the diameter of the first plugging section, forming a first limiting surface between the first and second plugging sections. The diameter of the second plugging section is smaller than the diameter of the third plugging section, forming a second limiting surface between the second and third plugging sections. The first limiting surface is pressed against the connection between the fourth and fifth hole sections, and the second limiting surface is pressed against the end of the sleeve away from the combustion furnace.

[0012] In one embodiment, a flow meter is also included, the flow meter being configured to measure the flow rate of gas flowing through the inlet.

[0013] In one embodiment, a pressure sensor is further included, which is disposed at the outlet end of the air inlet.

[0014] According to another aspect of this application, a combustion furnace is provided, including any of the aforementioned air intake devices.

[0015] The beneficial effects of this application are as follows: The combustion furnace is connected to the outside world through a sleeve. When the plug is inserted into the sleeve, it can isolate the inside of the combustion furnace from the outside world, ensuring the sealing performance of the combustion furnace and facilitating the smooth progress of the relevant reactions inside the combustion furnace, thus improving the reaction effect inside the furnace. When it is necessary to introduce gas into the combustion furnace, the plug is removed, and the gas inlet is inserted into the sleeve. The gas inlet is connected to an external gas supply device to provide the gas required for the reaction inside the combustion furnace, which is conducive to the full occurrence of the reaction inside the furnace and improves the purity of the substances obtained from the reaction inside the furnace. The structure is simple, and the plug or gas inlet can be selectively used according to the usage requirements. The plug and gas inlet are easy to disassemble and assemble, which helps to improve work efficiency. Attached Figure Description

[0016] The technical solution and other beneficial effects of this application will become apparent from the following detailed description of specific embodiments in conjunction with the accompanying drawings.

[0017] Figure 1 This is a schematic diagram of the usage state of an air intake device provided in an embodiment of this application.

[0018] Figure 2 yes Figure 1A sectional view.

[0019] Figure 3 yes Figure 2 Enlarged view of point A in the middle.

[0020] Figure 4 This is a schematic diagram of another usage state of an air intake device provided in an embodiment of this application.

[0021] Figure 5 yes Figure 4 A sectional view.

[0022] Figure 6 This is a schematic diagram of an air intake component provided in an embodiment of this application.

[0023] Figure 7 This is a partial schematic diagram of a combustion furnace provided in an embodiment of this application.

[0024] In the picture:

[0025] 10. Sleeve; 11. Mounting hole; 111. Fourth hole section; 112. Fifth hole section; 113. Third limiting surface;

[0026] 20. Blocking component; 21. First blocking section; 22. Second blocking section; 23. Third blocking section; 24. First limiting surface; 25. Second limiting surface;

[0027] 30. Air intake component; 31. Air intake port; 311. First hole section; 312. Second hole section; 313. Third hole section; 314. Transition section; 32. Mounting part; 33. Air intake part;

[0028] 40. Combustion furnace; 41. Furnace wall;

[0029] 50. Pipe fittings. Detailed Implementation

[0030] 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 a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0031] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" 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, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0032] The air intake device and combustion furnace of this application will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] In the existing technology, the alloy steel produced by reduction in a combustion furnace has a lower quality and a relatively higher production cost.

[0034] To address the aforementioned technical problems, this application provides an air intake device configured to introduce air into a combustion furnace. The air intake device includes a sleeve, a blocking element, and an air intake component. The sleeve is connected to and penetrates the furnace wall. One of the blocking element and the air intake component is inserted into the sleeve. The blocking element is configured to seal the sleeve, and the air intake component is configured to deliver external gas into the combustion furnace. This will be described in detail below.

[0035] See Figure 1 , Figure 2 , Figure 4 , Figure 5 as well as Figure 7 The air intake device is configured to introduce air into the combustion furnace 40. The air intake device includes a sleeve 10, a plug 20, and an air intake component 30. The sleeve 10 is connected to the furnace wall 41 of the combustion furnace 40 and penetrates the furnace wall 41. One of the plug 20 and the air intake component 30 is inserted into the sleeve 10. The plug 20 is configured to block the sleeve 10, and the air intake component 30 is configured to deliver external gas into the combustion furnace 40.

[0036] The combustion furnace 40 is connected to the outside world (the external space of the combustion furnace 40, the same below) through the sleeve 10. When the plug 20 is inserted into the sleeve 10, it can isolate the inside of the combustion furnace 40 from the outside world, ensuring the sealing performance of the combustion furnace 40, which is conducive to the smooth progress of the relevant reactions of the substances inside the combustion furnace 40 and improves the reaction effect inside the furnace. When it is necessary to introduce gas into the combustion furnace 40, the plug 20 is removed and the gas inlet 30 is inserted into the sleeve 10. The gas inlet 30 is connected to the external gas supply device to provide the gas required for the reaction inside the combustion furnace 40, which is conducive to the full occurrence of the reaction inside the furnace and improves the purity of the substances obtained from the reaction inside the furnace.

[0037] The structure is simple. Depending on the usage requirements, either the blocking component 20 or the air intake component 30 can be used selectively. The blocking component 20 and the air intake component 30 are easy to disassemble and assemble, which helps to improve work efficiency.

[0038] It is worth mentioning that after the gas is supplied to the furnace through the gas inlet 30, the gas inlet 30 is replaced with the blockage part 20 to seal the sleeve. That is, during the reaction in the furnace, the blockage part 20 is in contact with the high temperature inside the furnace, avoiding the gas inlet 30 from being in contact with the high temperature inside the furnace during the reaction. This is beneficial to improving the service life of the gas inlet 30 and preventing the gas inlet 30 (located at the end inside the furnace) from deforming due to excessive temperature or collision with materials inside the furnace. This is also beneficial to the precise control of the gas intake.

[0039] For example, in some embodiments, the combustion furnace 40 is a reduction rotary furnace used for the reduction of copper smelting waste slag. In actual use, copper smelting waste slag is added into the furnace, and the air inlet 30 is connected to the sleeve 10. Hydrogen is supplied to the furnace through the air inlet 30 (utilizing the strong reducing properties of hydrogen at high temperatures to reduce metal ions or other ions into pure metals to form alloys. Specifically, under high-temperature conditions, hydrogen reacts with metal oxides or other compounds to generate the required elemental metals, as well as compounds such as silicon carbide, silicon dioxide, and sodium silicate). Once the hydrogen content reaches the required level, the air inlet 30 is replaced with a blocking element 20, and the reduction rotary furnace is rotated to carry out the reduction reaction. By providing hydrogen to the furnace through the air inlet device, the reduction efficiency is greatly improved. When the reduction rotary furnace rotates, the external gas supply device is separated from the reduction rotary furnace (the sleeve 10 is blocked by the blocking element 20, and the air inlet 30 leaves the reduction rotary furnace), and no interference occurs.

[0040] It should be noted that in some embodiments, the combustion furnace 40 can also be used as a furnace body for other functions (not limited to reduction reaction), and can also be non-rotating. When the combustion furnace 40 is not rotating, although the air inlet 30 will not interfere with the furnace body after the air supply is completed (the air inlet 30 is not removed from the furnace body after the air supply is completed), it will be affected by the high temperature inside the furnace body. Therefore, after the air supply is completed, the air inlet 30 still needs to be removed and replaced with the blockage part 20.

[0041] It should be noted that the safe use of the air intake device is crucial. In some embodiments, safety components can be used to prevent risks such as hydrogen leakage and explosion. For example, a hydrogen leakage detection system can be installed, which includes a concentration sensor, an alarm device, and a shut-off device. The concentration sensor can monitor the hydrogen concentration in the environment in real time, usually with a ppm threshold (parts per million, indicating how many parts of a mixture are of concern). When the concentration exceeds the limit, an audible and visual alarm is triggered (the alarm device is triggered), and it can be linked with the shut-off device to achieve an emergency shutdown, cutting off the gas supply within 0.5 to 2 seconds.

[0042] In some embodiments, the safety components also include a backfire prevention device and a flame suppression system. The backfire prevention device can prevent flames from entering the hydrogen pipeline in reverse and causing an explosion, such as a sintered metal flame arrester or a corrugated plate flame arrester. The flame suppression system includes a flame detector (which detects open flames via infrared or ultraviolet sensors) and a fire extinguishing device. The fire extinguishing device can automatically spray water mist or activate a carbon dioxide fire extinguisher to extinguish open flames, effectively improving the safety of the combustion furnace 40.

[0043] Meanwhile, a pressure relief valve, a rupture disc, and a grounding device can be installed on the combustion furnace 40. The pressure relief valve and the rupture disc are linked with the aforementioned pressure sensor. When overpressure occurs, the pressure relief valve automatically releases hydrogen gas to protect the equipment. Under some extreme pressure conditions, the rupture disc can achieve one-time pressure relief to protect the equipment. The grounding device can eliminate static electricity and prevent the generation of sparks, thus improving the safety of the combustion furnace 40. At the same time, explosion-proof electrical equipment that conforms to IEC standards (international electrotechnical standards formulated by the International Electrotechnical Commission) such as explosion-proof motors and junction boxes can be used to prevent internal sparks from coming into contact with external gas (hydrogen), thereby improving the overall safety of use.

[0044] In some embodiments, the safety components also include a gas purging system that replaces hydrogen in the pipeline with an inert gas (e.g., nitrogen) before the equipment is started or after it is shut down, to prevent the formation of an explosive mixture.

[0045] It is worth mentioning that, in order to ensure the safe use of the combustion furnace 40, the external environment of the combustion furnace 40 can also be arranged, such as setting up a ventilation system to ensure air circulation in the equipment room and reduce the risk of hydrogen accumulation, and setting up an explosion vent on the roof of the equipment room (factory building) to release pressure in a directional manner during an explosion and reduce the damage caused by the explosion.

[0046] Explosion-proof walls and other isolation structures can be installed around the combustion furnace 40 to limit the range of the explosion. Conspicuous signs should be added to the hydrogen pipeline to indicate the direction of hydrogen flow. At the same time, personnel operation training should be carried out, emergency procedures should be standardized, and regular maintenance should be performed.

[0047] In some embodiments, the air intake 30 is provided with an air intake hole 31, which is divided into a first hole section 311, a second hole section 312 and a third hole section 313 along the axial direction of the air intake 30. The third hole section 313 is located at the air intake end of the air intake 30. The diameter of the second hole section 312 is larger than the diameter of the first hole section 311 and smaller than the diameter of the third hole section 313.

[0048] The third hole section 313 is located at the air inlet end of the air inlet component 30, that is, the third hole section 313 is used to connect with the external air supply device to supply gas to the furnace body; correspondingly, the first hole section 311 is located at the air outlet end of the air inlet component 30, that is, the externally supplied gas enters the furnace body after passing through the third hole section 313, the second hole section 312 and the first hole section 311 in sequence.

[0049] In this embodiment, the diameters of the third orifice 313, the second orifice 312, and the first orifice 311 gradually decrease, and the flow rate of the gas (gas supplied by the external gas supply device) gradually increases after passing through the three orifice sections (the third orifice 313, the second orifice 312, and the first orifice 311). This allows the gas entering the furnace to be transported to a farther location (the gas is further away from the gas inlet 30), so that the gas can fill the interior of the furnace, which is conducive to the full occurrence of the reaction inside the furnace.

[0050] It is worth mentioning that by changing the diameter of different orifice sections, the use of air intake devices is reduced, thus lowering production costs. Only one air intake component 30 needs to be installed on the furnace wall 41 (on the same circumference side) to ensure that the furnace is filled with the required gas. In addition, the gas is transported to the side away from the air intake component 30 to prevent the gas from accumulating near the air intake component 30. During the process of replacing the air intake component 30 with the blockage component 20 after the air intake is completed, the gas is less likely to flow out of the combustion furnace 40.

[0051] It should be noted that the smaller diameter of the first orifice 311 facilitates precise control of the gas flow rate into the furnace. The smaller diameter of the first orifice 311 also reduces the amount of gas entering the furnace per unit time, allowing for more precise control of the total amount of gas entering and improving intake accuracy. The outlet end of the intake component 30 is the end closest to the furnace interior, while the intake end is the end where it connects to the external gas supply device.

[0052] In some embodiments, the wall of the third hole section 313 is threaded, and the air inlet 30 is connected to the air supply pipeline of the external air supply device through the threaded pipe connector 50. The structure is simple and easy to use, and the threaded connection can ensure the overall airtightness and prevent gas leakage. In some embodiments, it can also be connected by quick connectors or other means, but is not limited to these.

[0053] See Figure 3 The diameter of the first hole segment 311 is d, which satisfies: 0.5 mm ≤ d ≤ 1 mm, for example, 0.5 mm, 0.8 mm, 1 mm, etc.

[0054] When the value of d is less than 0.5 mm, the diameter of the first orifice 311 is too small, resulting in less air intake per unit time, increasing the air intake time, which is not conducive to improving production efficiency. Moreover, the small diameter makes the first orifice 311 more prone to clogging, affecting the air intake effect. When the value of d is greater than 1 mm, the diameter of the first orifice 311 is too large, which reduces the gas flow rate into the furnace. Under low gas flow rate conditions, the gas cannot flow well to the side opposite to the air intake component 30 (inside the furnace body), meaning that the gas is not easy to fill the inside of the furnace body, which is not conducive to improving reaction efficiency.

[0055] Therefore, when 0.5 mm ≤ d ≤ 1 mm, the first orifice section 311 can ensure that the gas flowing through it has a sufficient flow velocity to fill the interior of the furnace body and ensure the air intake, while also preventing the first orifice section 311 from becoming blocked.

[0056] In some embodiments, a transition section 314 is provided between the first hole section 311 and the second hole section 312, and the diameter of the transition section 314 gradually decreases in the direction from the second hole section 312 toward the first hole section 311.

[0057] In this embodiment, a transition section 314 is provided between the first orifice section 311 and the second orifice section 312, so that the gas in the second orifice section 312 can smoothly enter the first orifice section 311, thereby improving the intake efficiency and intake accuracy; the transition section 314 is equivalent to a guide surface, which can guide the gas to the first orifice section 311 and avoid turbulence.

[0058] When the transition orifice section 314 is not set, due to the diameter difference between the second orifice section 312 and the first orifice section 311, a stepped surface will be formed between them. The gas entering the first orifice section 311 from the second orifice section 312 will collide with the stepped surface and flow in the opposite direction. Turbulence will be formed at the connection between the second orifice section 312 and the first orifice section 311. The diameter of the first orifice section 311 is small, which will affect the intake efficiency and intake accuracy.

[0059] See Figure 2 as well as Figure 6 The air intake component 30 includes a mounting part 32 and an air intake part 33. The air intake part 33 is disposed at the end of the mounting part 32 near the interior of the combustion furnace 40. The mounting part 32 is screwed to the sleeve 10, and the air intake part 33 is detachably connected to the mounting part 32.

[0060] The air inlet 33 is located at the end of the mounting part 32 near the combustion furnace 40. That is, the air inlet 33 is closer to the combustion furnace 40. The operating temperature of the air inlet 33 will be higher, the service life will be shorter, and it will be prone to blockage, which is not conducive to the gas entering the furnace. When the air inlet 33 can no longer meet the requirements, it can be replaced without replacing the mounting part 32, which greatly reduces the cost of consumables.

[0061] In this embodiment, the air intake component 30 is also screwed onto the sleeve 10 via the mounting part 32, which is convenient for installation and can ensure the overall airtightness; in some embodiments, other connection methods may also be used, not limited to this.

[0062] It should be noted that the connection between the mounting part 32 and the air intake part 33 can be a screw connection, a snap-fit ​​connection, or other connection methods, as long as the stability and airtightness of the connection between the mounting part 32 and the air intake part 33 are ensured.

[0063] In some embodiments, the sleeve 10 is provided with a mounting hole 11, which is divided into a fourth hole section 111 and a fifth hole section 112 along the axial direction of the sleeve 10. The fourth hole section 111 is located at the end of the fifth hole section 112 near the interior of the combustion furnace 40. The diameter of the fourth hole section 111 is smaller than the diameter of the fifth hole section 112.

[0064] The diameter of the fourth hole section 111 is smaller than the diameter of the fifth hole section 112. That is, the diameter of the end of the sleeve 10 closest to the inside of the combustion furnace 40 is smaller. During the process of replacing the air inlet 30 with the blockage 20 (to complete the air inlet operation), the smaller diameter can prevent the gas in the furnace from flowing to the outside of the combustion furnace 40 through the sleeve 10, which is beneficial to ensure that the gas content in the furnace meets the usage requirements.

[0065] In some embodiments, the plugging member 20 is sequentially divided into a first plugging section 21, a second plugging section 22, and a third plugging section 23 along the axial direction of the plugging member 20. The first plugging section 21 is disposed at one end of the second plugging section 22 near the interior of the combustion furnace 40. The diameter of the second plugging section 22 is larger than the diameter of the first plugging section 21, so as to form a first limiting surface 24 between the first plugging section 21 and the second plugging section 22. The diameter of the second plugging section 22 is smaller than the diameter of the third plugging section 23, so as to form a second limiting surface 25 between the second plugging section 22 and the third plugging section 23. The first limiting surface 24 is pressed against the connection between the fourth hole section 111 and the fifth hole section 112, and the second limiting surface 25 is pressed against the end of the sleeve 10 away from the combustion furnace 40.

[0066] In this embodiment, when the plugging member 20 is inserted into the sleeve 10, the first limiting surface 24 is pressed against the third limiting surface 113 (for ease of explanation, the connection between the fourth hole segment 111 and the fifth hole segment 112 is referred to as the third limiting surface 113), and the second limiting surface 25 is pressed against the end of the sleeve 10; that is, the plugging member 20 is protected by the first limiting surface 24 and the second limiting surface 25, which ensures the airtightness of the connection between the plugging member 20 and the sleeve 10, thereby ensuring the airtightness of the interior of the combustion furnace 40.

[0067] It should be noted that the plugging component 20 and the sleeve 10 can be connected by threads. In some embodiments, the threads provided on the circumference of the second plugging section 22 are screwed into the threads on the inner wall of the sleeve 10, but this is not the only one.

[0068] In some embodiments, the outer peripheral wall of the sleeve 10 is also threaded to the combustion furnace 40. The direction of the thread on the outer peripheral wall of the sleeve 10 is the same as the direction of the thread on the circumferential side of the second sealing section 22. When the plugging member 20 is screwed onto the sleeve 10, the sleeve 10 can be simultaneously tightened onto the combustion furnace 40, preventing the sleeve 10 from loosening when the plugging member 20 is screwed on.

[0069] In some embodiments, the air intake device further includes a flow meter configured to measure the flow rate of gas flowing through the air intake 30.

[0070] By setting the flow meter, the gas flow rate can be accurately measured. According to the actual production process, a suitable flow rate value can be set, and the controller can automatically adjust the opening of the flow regulating valve to stabilize the gas flow rate near the set value.

[0071] In some embodiments, the air intake device further includes a pressure sensor disposed at the air outlet end of the air intake 30.

[0072] By setting up a pressure sensor, gas pressure can be monitored in real time, and pressure changes can be fed back in a timely and accurate manner, thus improving the safety of use.

[0073] In some embodiments, a data acquisition system may also be set up to collect data acquired by sensors and use data analysis software to analyze the data in real time to understand the flow and pressure fluctuations during the gas supply process.

[0074] On the other hand, this application also relates to a combustion furnace 40, including any of the aforementioned air intake devices.

[0075] Using the technical solution provided in this application embodiment, the combustion furnace 40 is connected to the outside through the sleeve 10. When the plug 20 is inserted into the sleeve 10, it can isolate the inside of the combustion furnace 40 from the outside, ensuring the sealing performance of the combustion furnace 40, which is conducive to the smooth progress of the relevant reactions of the substances inside the combustion furnace 40 and improves the reaction effect inside the furnace. When it is necessary to introduce gas into the combustion furnace 40, the plug 20 is removed, and the gas inlet 30 is inserted into the sleeve 10. The gas inlet 30 is connected to the external gas supply device to provide the gas required for the reaction inside the combustion furnace 40, which is conducive to the full occurrence of the reaction inside the furnace and improves the purity of the substances obtained from the reaction inside the furnace. The structure is simple, and the plug 20 or the gas inlet 30 can be selectively used according to the usage requirements. The plug 20 and the gas inlet 30 are easy to disassemble and assemble, which helps to improve work efficiency.

[0076] In the various embodiments of this application, unless otherwise specified or logically conflicting, the terminology or descriptions between different embodiments are consistent and can be referenced mutually. Technical features in different embodiments can be combined to form new embodiments based on their inherent logical relationships. In this application, "at least one" means one or more, and "more than one" means two or more.

[0077] It is understood that the various numerical designations used in the embodiments of this application are merely for descriptive convenience and are not intended to limit the scope of the embodiments of this application. The order of the process numbers described above does not imply the order of execution; the execution order of each process should be determined by its function and internal logic.

[0078] The air intake device and combustion furnace provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand this application and its core ideas. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. An air intake device, characterized in that, Configured to introduce air into the combustion furnace, the air intake device includes a sleeve, a plug, and an air intake component; The sleeve is connected to the furnace wall of the combustion furnace, and the sleeve penetrates the furnace wall; One of the blocking component and the air inlet component is inserted into the sleeve, the blocking component is configured to block the sleeve, and the air inlet component is configured to deliver external gas into the combustion furnace.

2. The air intake device as described in claim 1, characterized in that, The air intake component is provided with an air intake hole, which is divided into a first hole section, a second hole section and a third hole section along the axial direction of the air intake component. The third hole section is located at the air intake end of the air intake component. The diameter of the second hole segment is larger than the diameter of the first hole segment and smaller than the diameter of the third hole segment.

3. The air intake device as described in claim 2, characterized in that, The diameter of the first hole is d, which satisfies: 0.5 mm ≤ d ≤ 1 mm.

4. The air intake device as described in claim 2, characterized in that, A transition section is provided between the first hole segment and the second hole segment, and the diameter of the transition section gradually decreases in the direction from the second hole segment to the first hole segment.

5. The air intake device as described in claim 1, characterized in that, The air intake component includes a mounting portion and an air intake portion, wherein the air intake portion is disposed at the end of the mounting portion near the interior of the combustion furnace; The mounting part is screwed to the sleeve, and the air intake part is detachably connected to the mounting part.

6. The air intake device as described in claim 1, characterized in that, The sleeve is provided with mounting holes, which are divided into a fourth hole section and a fifth hole section along the axial direction of the sleeve. The fourth hole section is located at the end of the fifth hole section near the interior of the combustion furnace. The diameter of the fourth hole segment is smaller than the diameter of the fifth hole segment.

7. The air intake device as described in claim 6, characterized in that, The blocking component is divided into a first blocking section, a second blocking section and a third blocking section along the axial direction of the blocking component. The first blocking section is located at one end of the second blocking section near the interior of the combustion furnace. The diameter of the second blocking segment is larger than the diameter of the first blocking segment, so as to form a first limiting surface between the first blocking segment and the second blocking segment; the diameter of the second blocking segment is smaller than the diameter of the third blocking segment, so as to form a second limiting surface between the second blocking segment and the third blocking segment. The first limiting surface is pressed against the connection between the fourth hole segment and the fifth hole segment, and the second limiting surface is pressed against the end of the sleeve away from the combustion furnace.

8. The air intake device as claimed in claim 1, characterized in that, It also includes a flow meter configured to measure the flow rate of gas flowing through the inlet.

9. The air intake device as claimed in claim 1, characterized in that, It also includes a pressure sensor, which is disposed at the outlet end of the air inlet.

10. A combustion furnace, characterized in that, Includes the air intake device as described in any one of claims 1 to 9.

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