Heat accumulating type oxidation furnace with high thermal shock resistance
By optimizing the design and material selection of the three-stage regenerative section of the regenerative oxidizer, the problems of cracking and collapse of the regenerative bricks at high temperatures were solved, improving the heat storage capacity and equipment stability, extending the service life, and increasing the efficiency of heat storage and release.
Patent Information
- Application Number
- CN202520263153.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-19
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2035-02-19
AI Technical Summary
The regenerative bricks in existing regenerative oxidizers are prone to cracking and collapse under operating conditions above 900℃, resulting in insufficient heat storage capacity or overload.
The heat storage section adopts a three-stage heat storage section design. The first heat storage section uses a single-layer matrix arrangement of small-sized first heat storage bricks, the second heat storage section uses a three-layer stacked matrix arrangement of medium-sized second heat storage bricks, and the third heat storage section uses a three-layer stacked matrix arrangement of large-sized third heat storage bricks. By combining ceramic materials and honeycomb ceramic heat storage bodies, the size and arrangement of the heat storage bricks are optimized to improve stability.
It effectively reduces high-temperature cracking and collapse of heat storage bricks, improves heat storage capacity, extends service life, and improves heat storage and release efficiency through the use of ceramic materials and honeycomb ceramic heat storage bodies, ensuring the stability of oxidation reaction and product quality.
Smart Images
Figure CN223782873U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of incinerators for treating waste gas, and relates to a regenerative oxidizer with high thermal shock resistance. Background Technology
[0002] "RTO" is short for "Regenerative Thermal Oxidizer". This technology heats organic waste gas to a high temperature and then directly oxidizes and decomposes it into CO2 and H2O, thereby treating the waste gas pollutants and recovering the heat generated during decomposition. It is an energy-saving and environmentally friendly device for treating medium- to high-concentration organic waste gas.
[0003] The heat storage capacity of an RTO (Regenerative Thermal Oxidizer) is primarily achieved through heat storage bricks. During the heat storage phase, exhaust gas is burned in the RTO combustion chamber and then discharged through the heat storage bricks, with the heat absorbed by the bricks. During the cooling phase, exhaust gas enters the RTO heat storage bricks and absorbs the heat stored within them. Combustion in the combustion chamber reduces energy consumption. Therefore, the heat storage bricks directly contact the high-temperature furnace where the exhaust gas is burned, undergoing intermittent cooling and heat absorption processes. Currently, the typical RTO combustion chamber temperature is 800–900℃. There are three common arrangements of heat storage bricks: the first uses entirely random packing such as ceramic rectangular saddle rings; the second uses entirely multi-layer plate-combined ceramic heat storage bricks; and the third uses entirely honeycomb ceramic heat storage bricks. However, under operating conditions above 900℃, all three arrangements present problems. The first and second arrangements have low heat storage capacity, and the RTO outlet is prone to overheating. The third arrangement offers increased heat storage capacity, but the heat storage bricks are susceptible to cracking and collapse under high temperatures. Utility Model Content
[0004] The purpose of this invention is to provide a regenerative oxidation furnace with high thermal shock resistance, which solves the problem of regenerative bricks easily cracking and collapsing due to high temperatures in the prior art.
[0005] The technical solution adopted by this utility model includes a furnace body, with a burner installed on the top of the furnace body. The combustion port of the burner is located inside the furnace body. Three heat storage sections are provided inside the furnace body along the direction away from the combustion port towards the bottom of the furnace. The three heat storage sections are respectively a first heat storage section, a second heat storage section, and a third heat storage section along the direction away from the combustion port. The first heat storage section includes multiple first heat storage bricks of the same size, the second heat storage section includes multiple second heat storage bricks of the same size, and the third heat storage section includes multiple third heat storage bricks of the same size. The size of the first heat storage brick is not greater than the size of the second heat storage brick, and the size of the second heat storage brick is not greater than the size of the third heat storage brick.
[0006] The features of this utility model also include:
[0007] In the first heat storage section, the first heat storage bricks are arranged in a single layer in a matrix arrangement. In the second heat storage section, the second heat storage bricks are stacked in three layers along the direction away from the combustion port, and the second heat storage bricks in each layer are arranged in a matrix. In the third heat storage section, the third heat storage bricks are stacked in three layers along the direction away from the combustion port, and the third heat storage bricks in each layer are arranged in a matrix.
[0008] The first heat storage brick in the first heat storage section is a single layer, the second heat storage brick in the second heat storage section has three layers, and the third heat storage brick in the third heat storage section has three layers.
[0009] The third heat storage brick is a cuboid, 100-200mm long, 100-200mm wide, and 200-400mm high. The size of the second heat storage brick is 0.25-0.5 times that of the third heat storage brick, and the size of the first heat storage brick is 0.25-0.5 times that of the second heat storage brick.
[0010] The first, second, and third heat storage bricks are all ceramic heat storage materials.
[0011] The third type of heat storage brick is a honeycomb ceramic heat storage body.
[0012] Random packing material is installed on the upper surface of the first heat storage brick.
[0013] The random packing material is made of ceramic rectangular saddle rings or ceramic balls.
[0014] The bottom of the furnace body is equipped with a support plate.
[0015] The beneficial effects of this utility model are:
[0016] This invention can reduce the possibility of cracking and collapse of heat storage bricks under ultra-high temperature conditions, thereby improving the product's service life. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of the regenerative oxidation furnace with high thermal shock resistance of this utility model;
[0018] In the diagram: 1. Furnace body; 101. Furnace top; 102. Furnace bottom; 2. Support plate; 301. First regenerator brick; 302. Second regenerator brick; 303. Third regenerator brick; 4. Burner; 401. Combustion port; 5. Random packing; 601. First regenerator section; 602. Second regenerator section; 603. Third regenerator section. Detailed Implementation
[0019] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.
[0020] This utility model relates to a regenerative oxidation furnace with high thermal shock resistance, such as... Figure 1As shown, the furnace includes a furnace body 1. A burner 4 is installed through the top 101 of the furnace body 1. The combustion port 401 of the burner 4 is located inside the furnace body 1. Three heat storage sections are provided inside the furnace body 1 along the direction away from the combustion port 401 towards the bottom 102. The three heat storage sections along the direction away from the combustion port 401 are a first heat storage section 601, a second heat storage section 602, and a third heat storage section 603, respectively. The first heat storage section 601 includes multiple first heat storage bricks 301 of the same size. The second heat storage section 602 includes multiple second heat storage bricks 302 of the same size. The third heat storage section 603 includes multiple third heat storage bricks 303 of the same size. The size of the first heat storage brick 301 is not greater than the size of the second heat storage brick 302, and the size of the second heat storage brick 302 is not greater than the size of the third heat storage brick 303.
[0021] In the first heat storage section 601, the first heat storage bricks 301 are arranged in a single layer in a matrix arrangement. In the second heat storage section 602, the second heat storage bricks 302 are stacked in three layers along the direction away from the combustion port 401, and the second heat storage bricks 302 in each layer are arranged in a matrix. In the third heat storage section 603, the third heat storage bricks 303 are stacked in three layers along the direction away from the combustion port 401, and the third heat storage bricks 303 in each layer are arranged in a matrix.
[0022] The third heat storage brick 303 is a cuboid with a length of 100-200mm, a width of 100-200mm, and a height of 200-400mm. The size of the second heat storage brick 302 is 0.25-0.5 times the size of the third heat storage brick 303, and the size of the first heat storage brick 301 is 0.25-0.5 times the size of the second heat storage brick 302.
[0023] The first heat storage brick 301, the second heat storage brick 302, and the third heat storage brick 303 are all ceramic heat storage bodies.
[0024] The third heat storage brick 303 is a honeycomb ceramic heat storage body.
[0025] Random packing 5 is installed on the upper surface of the first heat storage section 601.
[0026] The bottom of the furnace body 1 is equipped with a support plate 2.
[0027] Example 1
[0028] A regenerative oxidizer with high thermal shock resistance includes a furnace body 1. A burner 4 is installed through the furnace top 101 of the furnace body 1. The combustion port 401 of the burner 4 is located inside the furnace body 1. Three regenerative sections are provided inside the furnace body 1 along the direction away from the combustion port 401 towards the furnace bottom 102. The three regenerative sections along the direction away from the combustion port 401 are a first regenerative section 601, a second regenerative section 602, and a third regenerative section 603, respectively. The first regenerative section 601 includes multiple first regenerative bricks 301 of the same size. The second regenerative section 602 includes multiple second regenerative bricks 302 of the same size. The third regenerative section 603 includes multiple third regenerative bricks 303 of the same size. The size of the first regenerative brick 301 is not larger than the size of the second regenerative brick 302, and the size of the second regenerative brick 302 is not larger than the size of the third regenerative brick 303.
[0029] Because the first heat storage brick 301 in the first heat storage section 601 is small in size, its deformation will not change drastically. Also, due to its small size, its structure is more stable. On the other hand, the small size of the first heat storage brick 301 results in more gaps between the first heat storage bricks 301 in the first heat storage section 601, which can accommodate more of the deformation part of the first heat storage brick 301 after being heated. After the heat continues to be transferred downward, it enters the second heat storage brick 302 in the second heat storage section 602. The heat is stored in the second heat storage brick 302. Due to its small size, the deformation will not be large. The third heat storage brick 303 realizes the final accumulation of heat. At this time, the temperature has dropped to below 100°C. The third heat storage brick 303 can normally store heat and undergo deformation within the effective range of the third heat storage brick 303.
[0030] Example 2
[0031] A regenerative oxidizer with high thermal shock resistance includes a furnace body 1. A burner 4 is installed through the top 101 of the furnace body 1. The combustion port 401 of the burner 4 is located inside the furnace body 1. Three regenerative sections are arranged inside the furnace body 1 from the direction away from the combustion port 401 towards the bottom 102. The three regenerative sections are designated as a first regenerative section 601, a second regenerative section 602, and a third regenerative section 603, respectively. The first regenerative section 601 includes multiple first regenerative bricks 301 of the same size, arranged in a matrix in a single layer. The second regenerative section 602 includes... Multiple second heat storage bricks 302 of the same size are stacked in three layers along the direction away from the combustion port 401, and the second heat storage bricks 302 in each layer are arranged in a matrix. The third heat storage section 603 includes multiple third heat storage bricks 303 of the same size, which are stacked in three layers along the direction away from the combustion port 401, and the third heat storage bricks 303 in each layer are arranged in a matrix. The size of the first heat storage brick 301 is not greater than the size of the second heat storage brick 302, and the size of the second heat storage brick 302 is not greater than the size of the third heat storage brick 303.
[0032] Because the first heat storage brick 301 in the first heat storage section 601 is small in size, its deformation will not change drastically. Also, due to its small size, its structure is more stable. On the other hand, the small size of the first heat storage brick 301 results in more gaps between the first heat storage bricks 301 in the first heat storage section 601, which can accommodate more of the deformation part of the first heat storage brick 301 after being heated. After the heat continues to be transferred downward, it enters the second heat storage brick 302 in the second heat storage section 602. The heat is stored in the second heat storage brick 302. Due to its small size, the deformation will not be large. The third heat storage brick 303 realizes the final accumulation of heat. At this time, the temperature has dropped to below 100°C. The third heat storage brick 303 can normally store heat and undergo deformation within the effective range of the third heat storage brick 303.
[0033] The first heat storage brick 301 in the first heat storage section 601 is a single layer, the second heat storage brick 302 in the second heat storage section 602 has three layers, and the third heat storage brick 303 in the third heat storage section 603 has three layers. This is because the temperature change and heat concentration are most drastic in the first heat storage section 601 near the burner 4. The single-layer first heat storage brick 301 can quickly absorb and release a large amount of heat due to its high specific surface area and relatively small heat capacity, effectively coping with high-temperature shocks. However, the second and third heat storage sections 602 and 603 are farther from the burner and have relatively lower heat, but they need to store more heat to maintain the thermal stability of the system. The three-layer heat storage brick design increases the total amount of heat storage material, enabling it to store more heat in these two areas, thereby better meeting the different heat storage and release needs at different locations throughout the heat storage process.
[0034] Example 3
[0035] A regenerative oxidizer with high thermal shock resistance includes a furnace body 1. A burner 4 is installed through the furnace top 101 of the furnace body 1. The combustion port 401 of the burner 4 is located inside the furnace body 1. Three regenerative sections are arranged inside the furnace body 1 from the direction away from the combustion port 401 towards the furnace bottom 102. The three regenerative sections are designated as a first regenerative section 601, a second regenerative section 602, and a third regenerative section 603, respectively. The first regenerative section 601 includes multiple first regenerative bricks 301 of the same size, arranged in a single layer in a matrix. The second regenerative section 602 includes multiple second regenerative bricks 302 of the same size, arranged in a matrix from the combustion port 401 towards the furnace bottom 102. The combustion chamber 401 is stacked in three layers, with the second heat storage bricks 302 in each layer arranged in a matrix. The third heat storage section 603 includes multiple third heat storage bricks 303 of the same size. The third heat storage bricks 303 are stacked in three layers along the direction away from the combustion chamber 401, with the third heat storage bricks 303 in each layer arranged in a matrix. The third heat storage brick 303 is a cuboid with a length of 100-200mm, a width of 100-200mm, and a height of 200-400mm. The size of the second heat storage brick 302 is 0.25-0.5 times the size of the third heat storage brick 303, and the size of the first heat storage brick 301 is 0.25-0.5 times the size of the second heat storage brick 302.
[0036] Because the first heat storage brick 301 in the first heat storage section 601 is small in size, its deformation will not change drastically. Also, due to its small size, its structure is more stable. On the other hand, the small size of the first heat storage brick 301 results in more gaps between the first heat storage bricks 301 in the first heat storage section 601, which can accommodate more of the deformation part of the first heat storage brick 301 after being heated. After the heat continues to be transferred downward, it enters the second heat storage brick 302 in the second heat storage section 602. The heat is stored in the second heat storage brick 302. Due to its small size, the deformation will not be large. The third heat storage brick 303 realizes the final accumulation of heat. At this time, the temperature has dropped to below 100°C. The third heat storage brick 303 can normally store heat and undergo deformation within the effective range of the third heat storage brick 303.
[0037] The first heat storage brick 301 in the first heat storage section 601 is a single layer, the second heat storage brick 302 in the second heat storage section 602 has three layers, and the third heat storage brick 303 in the third heat storage section 603 has three layers. This is because the temperature change and heat concentration are most drastic in the first heat storage section 601 near the burner 4. The single-layer first heat storage brick 301 can quickly absorb and release a large amount of heat due to its high specific surface area and relatively small heat capacity, effectively coping with high-temperature shocks. However, the second and third heat storage sections 602 and 603 are farther from the burner and have relatively lower heat, but they need to store more heat to maintain the thermal stability of the system. The three-layer heat storage brick design increases the total amount of heat storage material, enabling it to store more heat in these two areas, thereby better meeting the different heat storage and release needs at different locations throughout the heat storage process.
[0038] Example 4
[0039] A regenerative oxidizer with high thermal shock resistance includes a furnace body 1. A burner 4 is installed through the furnace top 101 of the furnace body 1. The combustion port 401 of the burner 4 is located inside the furnace body 1. Three regenerative sections are arranged inside the furnace body 1 from the direction away from the combustion port 401 towards the furnace bottom 102. The three regenerative sections are designated as a first regenerative section 601, a second regenerative section 602, and a third regenerative section 603, respectively. The first regenerative section 601 includes multiple first regenerative bricks 301 of the same size, arranged in a single layer in a matrix. The second regenerative section 602 includes multiple second regenerative bricks 302 of the same size, arranged in a matrix from the combustion port 401 towards the furnace bottom 102. The combustion chamber 401 is stacked in three layers, with the second heat storage bricks 302 in each layer arranged in a matrix. The third heat storage section 603 includes multiple third heat storage bricks 303 of the same size. The third heat storage bricks 303 are stacked in three layers along the direction away from the combustion chamber 401, with the third heat storage bricks 303 in each layer arranged in a matrix. The third heat storage brick 303 is a cuboid with a length of 100-200mm, a width of 100-200mm, and a height of 200-400mm. The size of the second heat storage brick 302 is 0.25-0.5 times the size of the third heat storage brick 303, and the size of the first heat storage brick 301 is 0.25-0.5 times the size of the second heat storage brick 302.
[0040] Because the first heat storage brick 301 in the first heat storage section 601 is small in size, its deformation will not change drastically. Also, due to its small size, its structure is more stable. On the other hand, the small size of the first heat storage brick 301 results in more gaps between the first heat storage bricks 301 in the first heat storage section 601, which can accommodate more of the deformation part of the first heat storage brick 301 after being heated. After the heat continues to be transferred downward, it enters the second heat storage brick 302 in the second heat storage section 602. The heat is stored in the second heat storage brick 302. Due to its small size, the deformation will not be large. The third heat storage brick 303 realizes the final accumulation of heat. At this time, the temperature has dropped to below 100°C. The third heat storage brick 303 can normally store heat and undergo deformation within the effective range of the third heat storage brick 303.
[0041] The first heat storage brick 301 in the first heat storage section 601 is a single layer, the second heat storage brick 302 in the second heat storage section 602 has three layers, and the third heat storage brick 303 in the third heat storage section 603 has three layers. This is because the temperature change and heat concentration are most drastic in the first heat storage section 601 near the burner 4. The single-layer first heat storage brick 301 can quickly absorb and release a large amount of heat due to its high specific surface area and relatively small heat capacity, effectively coping with high-temperature shocks. However, the second and third heat storage sections 602 and 603 are farther from the burner and have relatively lower heat, but they need to store more heat to maintain the thermal stability of the system. The three-layer heat storage brick design increases the total amount of heat storage material, enabling it to store more heat in these two areas, thereby better meeting the different heat storage and release needs at different locations throughout the heat storage process.
[0042] The first heat storage brick 301, the second heat storage brick 302, and the third heat storage brick 303 are all ceramic heat storage bodies. Ceramic materials have high specific heat capacity and thermal conductivity, which can absorb and store a large amount of heat during the heating process and slowly release heat during the cooling stage. This helps to maintain the stability of the temperature inside the oxidation furnace, ensure that the oxidation reaction is carried out under suitable temperature conditions, and improve the reaction efficiency and product quality.
[0043] Example 5
[0044] A regenerative oxidizer with high thermal shock resistance includes a furnace body 1. A burner 4 is installed through the furnace top 101 of the furnace body 1. The combustion port 401 of the burner 4 is located inside the furnace body 1. Three regenerative sections are arranged inside the furnace body 1 from the direction away from the combustion port 401 towards the furnace bottom 102. The three regenerative sections are designated as a first regenerative section 601, a second regenerative section 602, and a third regenerative section 603, respectively. The first regenerative section 601 includes multiple first regenerative bricks 301 of the same size, arranged in a single layer in a matrix. The second regenerative section 602 includes multiple second regenerative bricks 302 of the same size, arranged in a matrix from the combustion port 401 towards the furnace bottom 102. The combustion chamber 401 is stacked in three layers, with the second heat storage bricks 302 in each layer arranged in a matrix. The third heat storage section 603 includes multiple third heat storage bricks 303 of the same size. The third heat storage bricks 303 are stacked in three layers along the direction away from the combustion chamber 401, with the third heat storage bricks 303 in each layer arranged in a matrix. The third heat storage brick 303 is a cuboid with a length of 100-200mm, a width of 100-200mm, and a height of 200-400mm. The size of the second heat storage brick 302 is 0.25-0.5 times the size of the third heat storage brick 303, and the size of the first heat storage brick 301 is 0.25-0.5 times the size of the second heat storage brick 302.
[0045] Because the first heat storage brick 301 in the first heat storage section 601 is small in size, its deformation will not change drastically. Also, due to its small size, its structure is more stable. On the other hand, the small size of the first heat storage brick 301 results in more gaps between the first heat storage bricks 301 in the first heat storage section 601, which can accommodate more of the deformation part of the first heat storage brick 301 after being heated. After the heat continues to be transferred downward, it enters the second heat storage brick 302 in the second heat storage section 602. The heat is stored in the second heat storage brick 302. Due to its small size, the deformation will not be large. The third heat storage brick 303 realizes the final accumulation of heat. At this time, the temperature has dropped to below 100°C. The third heat storage brick 303 can normally store heat and undergo deformation within the effective range of the third heat storage brick 303.
[0046] The first heat storage brick 301 in the first heat storage section 601 is a single layer, the second heat storage brick 302 in the second heat storage section 602 has three layers, and the third heat storage brick 303 in the third heat storage section 603 has three layers. This is because the temperature change and heat concentration are most drastic in the first heat storage section 601 near the burner 4. The single-layer first heat storage brick 301 can quickly absorb and release a large amount of heat due to its high specific surface area and relatively small heat capacity, effectively coping with high-temperature shocks. However, the second and third heat storage sections 602 and 603 are farther from the burner and have relatively lower heat, but they need to store more heat to maintain the thermal stability of the system. The three-layer heat storage brick design increases the total amount of heat storage material, enabling it to store more heat in these two areas, thereby better meeting the different heat storage and release needs at different locations throughout the heat storage process.
[0047] The first regenerator brick 301, the second regenerator brick 302, and the third regenerator brick 303 are all ceramic regenerators. Ceramic materials have high specific heat capacity and thermal conductivity, enabling them to absorb and store a large amount of heat during heating and slowly release heat during cooling. This helps maintain a stable temperature inside the oxidation furnace, ensuring the oxidation reaction proceeds under suitable temperature conditions, thus improving reaction efficiency and product quality. The third regenerator brick 303 is a honeycomb ceramic regenerator. Firstly, its unique honeycomb structure and large specific surface area greatly increase the contact area with the hot airflow. When the hot airflow passes through the honeycomb channels, heat is transferred to the regenerator more quickly and fully, allowing it to store a large amount of heat in a shorter time, improving heat storage efficiency and helping to continuously provide stable heat energy to the oxidation furnace. Secondly, honeycomb ceramic regenerators typically have high strength and good structural stability, capable of withstanding external forces such as the scouring effect of airflow and mechanical vibration within the oxidation furnace. However, the manufacturing of honeycomb ceramic regenerators usually involves complex processes and specific materials, resulting in relatively high costs. Using honeycomb ceramic regenerators only in the lower layer can reduce the amount of honeycomb ceramic regenerators used while ensuring the key performance of the oxidation furnace, thereby effectively controlling the overall manufacturing cost of the equipment.
[0048] Example 6
[0049] A regenerative oxidizer with high thermal shock resistance includes a furnace body 1. A burner 4 is installed through the furnace top 101 of the furnace body 1. The combustion port 401 of the burner 4 is located inside the furnace body 1. Three regenerative sections are arranged inside the furnace body 1 from the direction away from the combustion port 401 towards the furnace bottom 102. The three regenerative sections are designated as a first regenerative section 601, a second regenerative section 602, and a third regenerative section 603, respectively. The first regenerative section 601 includes multiple first regenerative bricks 301 of the same size, arranged in a single layer in a matrix. The second regenerative section 602 includes multiple second regenerative bricks 302 of the same size, arranged in a matrix from the combustion port 401 towards the furnace bottom 102. The combustion chamber 401 is stacked in three layers, with the second heat storage bricks 302 in each layer arranged in a matrix. The third heat storage section 603 includes multiple third heat storage bricks 303 of the same size. The third heat storage bricks 303 are stacked in three layers along the direction away from the combustion chamber 401, with the third heat storage bricks 303 in each layer arranged in a matrix. The third heat storage brick 303 is a cuboid with a length of 100-200mm, a width of 100-200mm, and a height of 200-400mm. The size of the second heat storage brick 302 is 0.25-0.5 times the size of the third heat storage brick 303, and the size of the first heat storage brick 301 is 0.25-0.5 times the size of the second heat storage brick 302.
[0050] Because the first heat storage brick 301 in the first heat storage section 601 is small in size, its deformation will not change drastically. Also, due to its small size, its structure is more stable. On the other hand, the small size of the first heat storage brick 301 results in more gaps between the first heat storage bricks 301 in the first heat storage section 601, which can accommodate more of the deformation part of the first heat storage brick 301 after being heated. After the heat continues to be transferred downward, it enters the second heat storage brick 302 in the second heat storage section 602. The heat is stored in the second heat storage brick 302. Due to its small size, the deformation will not be large. The third heat storage brick 303 realizes the final accumulation of heat. At this time, the temperature has dropped to below 100°C. The third heat storage brick 303 can normally store heat and undergo deformation within the effective range of the third heat storage brick 303.
[0051] The first heat storage brick 301 in the first heat storage section 601 is a single layer, the second heat storage brick 302 in the second heat storage section 602 has three layers, and the third heat storage brick 303 in the third heat storage section 603 has three layers. This is because the temperature change and heat concentration are most drastic in the first heat storage section 601 near the burner 4. The single-layer first heat storage brick 301 can quickly absorb and release a large amount of heat due to its high specific surface area and relatively small heat capacity, effectively coping with high-temperature shocks. However, the second and third heat storage sections 602 and 603 are farther from the burner and have relatively lower heat, but they need to store more heat to maintain the thermal stability of the system. The three-layer heat storage brick design increases the total amount of heat storage material, enabling it to store more heat in these two areas, thereby better meeting the different heat storage and release needs at different locations throughout the heat storage process.
[0052] The first regenerator brick 301, the second regenerator brick 302, and the third regenerator brick 303 are all ceramic regenerators. Ceramic materials have high specific heat capacity and thermal conductivity, enabling them to absorb and store a large amount of heat during heating and slowly release heat during cooling. This helps maintain a stable temperature inside the oxidation furnace, ensuring the oxidation reaction proceeds under suitable temperature conditions, thus improving reaction efficiency and product quality. The third regenerator brick 303 is a honeycomb ceramic regenerator. Firstly, its unique honeycomb structure and large specific surface area greatly increase the contact area with the hot airflow. When the hot airflow passes through the honeycomb channels, heat is transferred to the regenerator more quickly and fully, allowing it to store a large amount of heat in a shorter time, improving heat storage efficiency and helping to continuously provide stable heat energy to the oxidation furnace. Secondly, honeycomb ceramic regenerators typically have high strength and good structural stability, capable of withstanding external forces such as the scouring effect of airflow and mechanical vibration within the oxidation furnace. However, the manufacturing of honeycomb ceramic regenerators usually involves complex processes and specific materials, resulting in relatively high costs. Using honeycomb ceramic regenerators only in the lower layer can reduce the amount of honeycomb ceramic regenerators used while ensuring the key performance of the oxidation furnace, thereby effectively controlling the overall manufacturing cost of the equipment.
[0053] The first heat storage section 601 is provided with random packing 5 on the side near the burner 4. The random packing 5 can further disperse and homogenize the airflow before it enters the first heat storage section 601. When the airflow reaches the upper surface of the first heat storage section 601, there may be uneven airflow distribution. The random packing 5 can play a role in buffering and equalizing the flow, so that the airflow enters all parts of the first heat storage section 601 more evenly, thereby improving the overall heat exchange efficiency of the heat storage furnace and avoiding local overheating or overcooling caused by uneven airflow.
[0054] Example 7
[0055] A regenerative oxidizer with high thermal shock resistance includes a furnace body 1. A burner 4 is installed through the furnace top 101 of the furnace body 1. The combustion port 401 of the burner 4 is located inside the furnace body 1. Three regenerative sections are arranged inside the furnace body 1 from the direction away from the combustion port 401 towards the furnace bottom 102. The three regenerative sections are designated as a first regenerative section 601, a second regenerative section 602, and a third regenerative section 603, respectively. The first regenerative section 601 includes multiple first regenerative bricks 301 of the same size, arranged in a single layer in a matrix. The second regenerative section 602 includes multiple second regenerative bricks 302 of the same size, arranged in a matrix from the combustion port 401 towards the furnace bottom 102. The combustion chamber 401 is stacked in three layers, with the second heat storage bricks 302 in each layer arranged in a matrix. The third heat storage section 603 includes multiple third heat storage bricks 303 of the same size. The third heat storage bricks 303 are stacked in three layers along the direction away from the combustion chamber 401, with the third heat storage bricks 303 in each layer arranged in a matrix. The third heat storage brick 303 is a cuboid with a length of 100-200mm, a width of 100-200mm, and a height of 200-400mm. The size of the second heat storage brick 302 is 0.25-0.5 times the size of the third heat storage brick 303, and the size of the first heat storage brick 301 is 0.25-0.5 times the size of the second heat storage brick 302.
[0056] Because the first heat storage brick 301 in the first heat storage section 601 is small in size, its deformation will not change drastically. Also, due to its small size, its structure is more stable. On the other hand, the small size of the first heat storage brick 301 results in more gaps between the first heat storage bricks 301 in the first heat storage section 601, which can accommodate more of the deformation part of the first heat storage brick 301 after being heated. After the heat continues to be transferred downward, it enters the second heat storage brick 302 in the second heat storage section 602. The heat is stored in the second heat storage brick 302. Due to its small size, the deformation will not be large. The third heat storage brick 303 realizes the final accumulation of heat. At this time, the temperature has dropped to below 100°C. The third heat storage brick 303 can normally store heat and undergo deformation within the effective range of the third heat storage brick 303.
[0057] The first heat storage brick 301 in the first heat storage section 601 is a single layer, the second heat storage brick 302 in the second heat storage section 602 has three layers, and the third heat storage brick 303 in the third heat storage section 603 has three layers. This is because the temperature change and heat concentration are most drastic in the first heat storage section 601 near the burner 4. The single-layer first heat storage brick 301 can quickly absorb and release a large amount of heat due to its high specific surface area and relatively small heat capacity, effectively coping with high-temperature shocks. However, the second and third heat storage sections 602 and 603 are farther from the burner and have relatively lower heat, but they need to store more heat to maintain the thermal stability of the system. The three-layer heat storage brick design increases the total amount of heat storage material, enabling it to store more heat in these two areas, thereby better meeting the different heat storage and release needs at different locations throughout the heat storage process.
[0058] The first regenerator brick 301, the second regenerator brick 302, and the third regenerator brick 303 are all ceramic regenerators. Ceramic materials have high specific heat capacity and thermal conductivity, enabling them to absorb and store a large amount of heat during heating and slowly release heat during cooling. This helps maintain a stable temperature inside the oxidation furnace, ensuring the oxidation reaction proceeds under suitable temperature conditions, thus improving reaction efficiency and product quality. The third regenerator brick 303 is a honeycomb ceramic regenerator. Firstly, its unique honeycomb structure and large specific surface area greatly increase the contact area with the hot airflow. When the hot airflow passes through the honeycomb channels, heat is transferred to the regenerator more quickly and fully, allowing it to store a large amount of heat in a shorter time, improving heat storage efficiency and helping to continuously provide stable heat energy to the oxidation furnace. Secondly, honeycomb ceramic regenerators typically have high strength and good structural stability, capable of withstanding external forces such as the scouring effect of airflow and mechanical vibration within the oxidation furnace. However, the manufacturing of honeycomb ceramic regenerators usually involves complex processes and specific materials, resulting in relatively high costs. Using honeycomb ceramic regenerators only in the lower layer can reduce the amount of honeycomb ceramic regenerators used while ensuring the key performance of the oxidation furnace, thereby effectively controlling the overall manufacturing cost of the equipment.
[0059] The first heat storage section 601 is provided with random packing 5 on the side near the burner 4. The random packing 5 can further disperse and homogenize the airflow before it enters the first heat storage section 601. When the airflow reaches the upper surface of the first heat storage section 601, there may be uneven airflow distribution. The random packing 5 can play a role in buffering and equalizing the flow, so that the airflow enters all parts of the first heat storage section 601 more evenly, thereby improving the overall heat exchange efficiency of the heat storage furnace and avoiding local overheating or overcooling caused by uneven airflow.
[0060] The random packing 5 is made of ceramic rectangular saddle rings or ceramic balls. Ceramic rectangular saddle rings possess excellent hydrodynamic properties, enabling the formation of favorable turbulence and promoting sufficient contact and heat exchange between the airflow and the packing material. Simultaneously, they ensure low airflow resistance, facilitating smooth airflow and improving system operating efficiency. Ceramic balls, with their perfect spherical structure, create a more complex and tortuous flow path when passing through the packing layer composed of ceramic balls. This increases the contact time and area between the airflow and the packing, thereby improving heat exchange efficiency. Furthermore, the spherical structure exhibits good self-adaptability, automatically adjusting its position to a certain extent, resulting in a denser and more uniform packing layer, which is beneficial for uniform airflow distribution.
[0061] Example 8
[0062] The regenerative oxidizer with high thermal shock resistance includes a furnace body 1. A burner 4 is installed on the top 101 of the furnace body 1, and a support plate 2 is provided at the bottom 102 of the furnace body 1. Since the furnace body 1 contains multiple layers of regenerative bricks 6, the overall mass is relatively large. The support plate 2 can bear the weight of the entire furnace body and distribute it evenly to the ground, preventing uneven settlement of the foundation due to excessive local stress. The combustion port 401 of the burner 4 is located inside the furnace body 1. Three regenerative sections are provided inside the furnace body 1 along the direction away from the combustion port 401 towards the bottom 102. The three regenerative sections along the direction away from the combustion port 401 are the first regenerative section 601, the second regenerative section 602, and the third regenerative section 603, respectively. The first regenerative section 601 includes multiple first regenerative bricks 301 of the same size, arranged in a matrix. The second heat storage section 602 consists of multiple second heat storage bricks 302 of the same size, stacked in three layers along the direction away from the combustion port 401. The second heat storage bricks 302 in each layer are arranged in a matrix. The third heat storage section 603 consists of multiple third heat storage bricks 303 of the same size, stacked in three layers along the direction away from the combustion port 401. The third heat storage bricks 303 in each layer are arranged in a matrix. The third heat storage bricks 303 are cuboids with a length of 100-200mm, a width of 100-200mm, and a height of 200-400mm. The size of the second heat storage bricks 302 is 0.25-0.5 times the size of the third heat storage bricks 303, and the size of the first heat storage bricks 301 is 0.25-0.5 times the size of the second heat storage bricks 302.
[0063] Because the first heat storage brick 301 in the first heat storage section 601 is small in size, its deformation will not change drastically. Also, due to its small size, its structure is more stable. On the other hand, the small size of the first heat storage brick 301 results in more gaps between the first heat storage bricks 301 in the first heat storage section 601, which can accommodate more of the deformation part of the first heat storage brick 301 after being heated. After the heat continues to be transferred downward, it enters the second heat storage brick 302 in the second heat storage section 602. The heat is stored in the second heat storage brick 302. Due to its small size, the deformation will not be large. The third heat storage brick 303 realizes the final accumulation of heat. At this time, the temperature has dropped to below 100°C. The third heat storage brick 303 can normally store heat and undergo deformation within the effective range of the third heat storage brick 303.
[0064] The first heat storage brick 301 in the first heat storage section 601 is a single layer, the second heat storage brick 302 in the second heat storage section 602 has three layers, and the third heat storage brick 303 in the third heat storage section 603 has three layers. This is because the temperature change and heat concentration are most drastic in the first heat storage section 601 near the burner 4. The single-layer first heat storage brick 301 can quickly absorb and release a large amount of heat due to its high specific surface area and relatively small heat capacity, effectively coping with high-temperature shocks. However, the second and third heat storage sections 602 and 603 are farther from the burner and have relatively lower heat, but they need to store more heat to maintain the thermal stability of the system. The three-layer heat storage brick design increases the total amount of heat storage material, enabling it to store more heat in these two areas, thereby better meeting the different heat storage and release needs at different locations throughout the heat storage process.
[0065] The first regenerator brick 301, the second regenerator brick 302, and the third regenerator brick 303 are all ceramic regenerators. Ceramic materials have high specific heat capacity and thermal conductivity, enabling them to absorb and store a large amount of heat during heating and slowly release heat during cooling. This helps maintain a stable temperature inside the oxidation furnace, ensuring the oxidation reaction proceeds under suitable temperature conditions, thus improving reaction efficiency and product quality. The third regenerator brick 303 is a honeycomb ceramic regenerator. Firstly, its unique honeycomb structure and large specific surface area greatly increase the contact area with the hot airflow. When the hot airflow passes through the honeycomb channels, heat is transferred to the regenerator more quickly and fully, allowing it to store a large amount of heat in a shorter time, improving heat storage efficiency and helping to continuously provide stable heat energy to the oxidation furnace. Secondly, honeycomb ceramic regenerators typically have high strength and good structural stability, capable of withstanding external forces such as the scouring effect of airflow and mechanical vibration within the oxidation furnace. However, the manufacturing of honeycomb ceramic regenerators usually involves complex processes and specific materials, resulting in relatively high costs. Using honeycomb ceramic regenerators only in the lower layer can reduce the amount of honeycomb ceramic regenerators used while ensuring the key performance of the oxidation furnace, thereby effectively controlling the overall manufacturing cost of the equipment.
[0066] The first heat storage section 601 is provided with random packing 5 on the side near the burner 4. The random packing 5 can further disperse and homogenize the airflow before it enters the first heat storage section 601. When the airflow reaches the upper surface of the first heat storage section 601, there may be uneven airflow distribution. The random packing 5 can play a role in buffering and equalizing the flow, so that the airflow enters all parts of the first heat storage section 601 more evenly, thereby improving the overall heat exchange efficiency of the heat storage furnace and avoiding local overheating or overcooling caused by uneven airflow.
[0067] The random packing 5 is made of ceramic rectangular saddle rings or ceramic balls. Ceramic rectangular saddle rings possess excellent hydrodynamic properties, enabling the formation of favorable turbulence and promoting sufficient contact and heat exchange between the airflow and the packing material. Simultaneously, they ensure low airflow resistance, facilitating smooth airflow and improving system operating efficiency. Ceramic balls, with their perfect spherical structure, create a more complex and tortuous flow path when passing through the packing layer composed of ceramic balls. This increases the contact time and area between the airflow and the packing, thereby improving heat exchange efficiency. Furthermore, the spherical structure exhibits good self-adaptability, automatically adjusting its position to a certain extent, resulting in a denser and more uniform packing layer, which is beneficial for uniform airflow distribution.
Claims
1. A regenerative oxidation furnace with high thermal shock resistance, characterized in that, The furnace includes a furnace body (1), and a burner (4) is installed through the furnace top (101) of the furnace body (1). The combustion port (401) of the burner (4) is located inside the furnace body (1). Three heat storage sections are provided inside the furnace body (1) along the direction away from the combustion port (401) toward the furnace bottom (102). The three heat storage sections are respectively the first heat storage section (601), the second heat storage section (602), and the third heat storage section (603) along the direction away from the combustion port (401). The first heat storage section (601) includes multiple first heat storage bricks (301) of the same size. The second heat storage section (602) includes multiple second heat storage bricks (302) of the same size. The third heat storage section (603) includes multiple third heat storage bricks (303) of the same size. The size of the first heat storage brick (301) is not greater than the size of the second heat storage brick (302). The size of the second heat storage brick (302) is not greater than the size of the third heat storage brick (303).
2. The regenerative oxidation furnace with high thermal shock resistance according to claim 1, characterized in that, In the first heat storage section (601), the first heat storage bricks (301) are arranged in a single layer in a matrix arrangement. In the second heat storage section (602), the second heat storage bricks (302) are stacked in three layers along the direction away from the combustion port (401), and the second heat storage bricks (302) in each layer are arranged in a matrix. In the third heat storage section (603), the third heat storage bricks (303) are stacked in three layers along the direction away from the combustion port (401), and the third heat storage bricks (303) in each layer are arranged in a matrix.
3. The regenerative oxidation furnace with high thermal shock resistance according to claim 2, characterized in that, The third heat storage brick (303) is a cuboid with a length of 100-200mm, a width of 100-200mm, and a height of 200-400mm. The size of the second heat storage brick (302) is 0.25-0.5 times the size of the third heat storage brick (303), and the size of the first heat storage brick (301) is 0.25-0.5 times the size of the second heat storage brick (302).
4. The regenerative oxidation furnace with high thermal shock resistance according to claim 3, characterized in that, The first heat storage brick (301), the second heat storage brick (302), and the third heat storage brick (303) are all ceramic heat storage bodies.
5. The regenerative oxidation furnace with high thermal shock resistance according to claim 4, characterized in that, The third heat storage brick (303) is a honeycomb ceramic heat storage body.
6. The regenerative oxidation furnace with high thermal shock resistance according to claim 5, characterized in that, The first heat storage section (601) is provided with random packing (5) on the side close to the burner (4).
7. The regenerative oxidation furnace with high thermal shock resistance according to claim 6, characterized in that, The random packing (5) is made of ceramic rectangular saddle rings or ceramic balls.
8. The regenerative oxidation furnace with high thermal shock resistance according to claim 7, characterized in that, The furnace body (1) has a support plate at the bottom of the furnace bottom (102).