Air exhaust, temperature reduction and pressure relief device for hearth
By employing a three-stage cooling method involving a cold water tank, a spray tower, and a gas mixing mechanism, the problem of cooling and depressurizing the furnace exhaust vents was solved, enabling safe gas discharge and stable operation of the test system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGZHOU CHUANGGE AUTOMATION EQUIP CO LTD
- Filing Date
- 2025-04-30
- Publication Date
- 2026-04-24
AI Technical Summary
Existing furnace exhaust vents cannot simultaneously cool the gas to a reasonable temperature and release pressure during high-temperature tests, posing a risk of open flame ejection and failing to meet the stringent requirements of testing equipment.
A three-stage cooling method is adopted, including primary cooling in a cold water tank, secondary cooling in a spray tower, and tertiary cooling in a gas mixing mechanism. Combining the principles of heat conduction, heat exchange, and mixing, the high-temperature gas is cooled and its pressure is released through the cold water tank, spray tower, and gas mixing mechanism.
It effectively reduces the gas temperature to a manageable range, ensures full release of pressure inside the furnace, prevents open flame ejection, and guarantees a safe testing environment and stable system operation.
Smart Images
Figure CN224163030U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of fire resistance performance testing equipment, specifically to a furnace exhaust cooling and pressure relief device. Background Technology
[0002] In various high-temperature testing scenarios, such as RABT-type fire resistance tests conducted according to standards like XF / T714-2007 "Rapid Heating Fire Resistance Test Method for Fire-Resistant Materials for Components" and GB28376-2012 "Tunnel Fire Protection Boards," stringent requirements are placed on the performance of the testing equipment. During the test, the highest temperature inside the furnace can reach 1200 degrees Celsius, and the furnace exhaust temperature can soar to 1200 degrees Celsius within a short time (5 minutes). This undoubtedly poses an extremely high challenge to the thermal shock resistance of the exhaust vent material.
[0003] Meanwhile, the pressure inside the furnace must also be strictly controlled. According to standards, for vertical components, the relative atmospheric pressure must be maintained at 0 Pa at a height of 500 mm above the bottom of the furnace chamber for the furnace to function normally. Furthermore, the pressure at the top of the specimen must not exceed 20 Pa, and the position of the pressure neutral plane should be adjustable. Ideally, the relative atmospheric pressure could be 0 Pa when the furnace exhaust vent is open at the corresponding height, but this would result in flames directly shooting into the laboratory, posing a significant safety hazard and rendering the operation impractical.
[0004] In summary, the current exhaust vents of experimental furnaces face a dual challenge: cooling the exhaust gas to a suitable temperature for direct connection to the environmental treatment system while ensuring sufficient pressure release within the furnace to allow for atmospheric connection and prevent open flame ejection. Existing exhaust vent technologies are insufficient to meet these complex and stringent requirements, necessitating an innovative technical solution to address these issues. Utility Model Content
[0005] The purpose of this invention is to provide a furnace exhaust cooling and pressure relief device to address the technical deficiencies mentioned in the background art.
[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:
[0007] A furnace exhaust cooling and depressurization device includes a test furnace and a cooling and depressurization device installed at the exhaust port of the test furnace. The exhaust port of the test furnace is horizontally provided with a first exhaust pipe. The cooling and depressurization device includes a cold water tank for primary cooling of the middle section of the first exhaust pipe, a spray tower for secondary cooling of the gas output from the end section of the first exhaust pipe, a gas mixing mechanism for tertiary cooling of the gas treated by the spray tower, and a furnace fan installed at the output end of the gas mixing mechanism. The furnace fan discharges the cooled and depressurized gas into an air purification system pipeline.
[0008] Furthermore, the first exhaust duct runs horizontally through the cold water tank, and the cold water in the cold water tank completely covers the middle section of the first exhaust duct; the end section of the exhaust duct extends into the spray tower, and the air outlet of the end section of the first exhaust duct is set downwards.
[0009] Furthermore, the spray tower is horizontally equipped with a spray pipe at the top, a spray overflow outlet and a spray drain outlet at the bottom; the cold water tank is equipped with a water inlet at the top and a tank drain outlet at the bottom.
[0010] Furthermore, it also includes a cooling tower that works in conjunction with the cold water tank and the spray tower. The hot water in the cold water tank is discharged from the tank drain outlet and transported to the cooling tower by a water pump for cooling. After cooling, it is pumped back into the cold water tank through the water inlet. The hot water in the spray tower is discharged from the spray drain outlet and transported to the cooling tower by a water pump for cooling. After cooling, it is pumped back into the spray pipe through the water inlet.
[0011] Furthermore, the top of the spray tower is connected to the furnace blower via a second exhaust duct. The gas mixing mechanism includes a gas mixing pipe installed at the input end of the furnace blower. The end section of the second exhaust duct extends into the gas mixing pipe. The diameter of the gas mixing pipe is larger than that of the second exhaust duct, forming a fresh air inlet.
[0012] Furthermore, both the cold water tank and the spray tower are made of stainless steel.
[0013] Compared with the prior art, the present invention has the following beneficial effects:
[0014] This utility model discloses a furnace exhaust cooling and depressurization device that uses a cold water tank, a spray tower, and a gas mixing mechanism to perform three-stage cooling of the high-temperature gas discharged from the experimental furnace. The cold water tank utilizes the principle of heat conduction for initial cooling, the spray tower further cools the gas through heat exchange, and the gas mixing mechanism achieves final cooling by mixing with room-temperature air. Finally, the furnace fan discharges the cooled and depressurized gas into the air purification system pipeline. This device effectively solves the problem of cooling and depressurizing the exhaust outlet in high-temperature experiments. It not only cools the exhaust gas to a reasonable temperature for connection to the environmental protection system but also ensures that the furnace pressure is fully released without open flame ejection, guaranteeing the safety of the experimental environment and the stable operation of the experimental system. It has significant practical value and economic benefits. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0016] Figure 1 This is a front view structural diagram of the present utility model;
[0017] Figure 2 This is a top view of the structure of this utility model. Detailed Implementation
[0018] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0019] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0020] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0021] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.
[0022] like Figure 1-2As shown, a furnace exhaust cooling and depressurization device includes a test furnace 1 and a cooling and depressurization device installed at the exhaust port of the test furnace 1. A first exhaust pipe 2 is horizontally installed at the exhaust port of the test furnace 1. The cooling and depressurization device includes a cold water tank 3 for primary cooling of the middle section of the first exhaust pipe 2, a spray tower 4 for secondary cooling of the gas output from the end section of the first exhaust pipe 2, a gas mixing mechanism for tertiary cooling of the gas treated by the spray tower 4, and a furnace fan 6 installed at the output end of the gas mixing mechanism. The furnace fan 6 discharges the cooled and depressurized gas into the air purification system pipeline.
[0023] Specifically, as shown in the figure, the first exhaust pipe 2 runs horizontally through the cold water tank 3, and the cold water in the cold water tank 3 completely covers the middle section of the first exhaust pipe 2; the end section of the exhaust pipe 2 extends into the spray tower 4, and the air outlet of the end section of the first exhaust pipe 2 is set downward.
[0024] Specifically, as shown in the figure, the spray tower 4 is horizontally arranged with a spray pipe 41 at the top, a spray overflow outlet 42 at the bottom, and a spray drain outlet 43; the cold water tank 3 is provided with a water inlet at the top and a tank drain outlet at the bottom.
[0025] Specifically, as shown in the figure, it also includes a cooling tower that works in conjunction with the cold water tank 3 and the spray tower 4. The hot water in the cold water tank 3 is discharged from the tank drain outlet and transported to the cooling tower by a water pump for cooling. After cooling, it is pumped back in from the inlet of the cold water tank 3. The hot water in the spray tower 4 is discharged from the spray drain outlet 43 and transported to the cooling tower by a water pump for cooling. After cooling, it is pumped back in from the inlet of the spray pipe 41.
[0026] Specifically, as shown in the figure, the top of the spray tower 4 is connected to the furnace blower 6 via a second exhaust pipe 5. The gas mixing mechanism includes a gas mixing pipe 61 located at the input end of the furnace blower 6. The end section of the second exhaust pipe 5 extends into the gas mixing pipe 61. The diameter of the gas mixing pipe 61 is larger than that of the second exhaust pipe 5, forming a fresh air inlet.
[0027] Specifically, as shown in the figure, both the cold water tank 3 and the spray tower 4 are made of stainless steel.
[0028] The working principle of this utility model is as follows:
[0029] Primary Cooling: High-temperature gas discharged from the experimental furnace 1 enters the horizontally placed first exhaust duct 2. The first exhaust duct 2 crosses the cold water tank 3, and the cold water in the cold water tank 3 completely covers the middle section of the first exhaust duct 2. Based on the principle of heat conduction, the heat of the high-temperature gas is transferred through the wall of the first exhaust duct 2 to the cold water in the cold water tank 3. Due to its high specific heat capacity, the cold water can absorb a large amount of heat, thus initially cooling the high-temperature gas. The cold water tank 3 has an inlet at the top and an outlet at the bottom. When the cold water absorbs heat and its temperature rises, it becomes hot water and is discharged from the outlet, then pumped to the cooling tower for cooling. The cooled cold water is then pumped back into the cold water tank 3 through the inlet for recycling, maintaining the low temperature of the cold water in the cold water tank 3, continuously cooling the gas in the first exhaust duct 2, effectively reducing the burden on subsequent cooling stages.
[0030] Secondary cooling: After primary cooling in the cold water tank 3, the gas flows along the first row of air ducts 2 to the end, then extends into the spray tower 4, with the outlet of the last section of the first row of air ducts 2 facing downwards. The horizontally positioned spray pipes 41 at the top of the spray tower 4 spray a large amount of low-temperature water mist into the tower, while the lower part is equipped with a spray overflow outlet 42 and a spray drain outlet 43. High-temperature gas exits downwards from the outlet of the last section of the first row of air ducts 2, making full contact with the downward-flowing water mist. Utilizing the principle of heat exchange, the heat in the gas is rapidly absorbed by the water mist, achieving secondary cooling and further reducing the gas temperature to a more manageable range. The hot water, heated by the absorbed heat inside the spray tower 4, is discharged from the spray drain outlet 43 and pumped to the cooling tower for further cooling. After cooling, it is pumped back in through the inlet of the spray pipes 41, forming a circulation and ensuring that the spray tower 4 continuously and stably performs its cooling function.
[0031] Three-stage cooling: Although the temperature of the gas treated by spray tower 4 has decreased, it still has not reached the ideal temperature for discharge into the air purification system duct. The top of spray tower 4 connects to the furnace fan 6 via a second exhaust duct 5. The end of the second exhaust duct 5 extends into the mixing duct 61, which is located at the input end of the furnace fan 6. The diameter of the mixing duct 61 is larger than that of the second exhaust duct 5, forming a fresh air inlet. In the mixing mechanism, the gas cooled by the first two stages is discharged from the second exhaust duct 5 and mixed with ambient air entering the mixing duct 61 from the fresh air inlet. By rationally controlling the mixing ratio and based on the principle of heat balance, the gas temperature is further reduced and stabilized within a suitable range, completing the three-stage cooling process.
[0032] Gas Discharge: Furnace blower 6 is located at the output end of the mixing mechanism, and its function is to provide power for gas flow. Furnace blower 6 discharges the gas, which has undergone three stages of cooling and has had its pressure appropriately released, into the air purification system pipeline. Throughout the process, as the gas temperature gradually decreases, its volume shrinks accordingly, and its pressure also decreases, achieving the effect of cooling and depressurization. This meets the requirement of safely discharging the treated gas into the air purification system pipeline, ensuring the safety of the surrounding environment of the experimental furnace 1 and the stable operation of the entire experimental system.
[0033] This utility model discloses a furnace exhaust cooling and depressurization device that uses a cold water tank, a spray tower, and a gas mixing mechanism to perform three-stage cooling of the high-temperature gas discharged from the experimental furnace. The cold water tank utilizes the principle of heat conduction for initial cooling, the spray tower further cools the gas through heat exchange, and the gas mixing mechanism achieves final cooling by mixing with room-temperature air. Finally, the furnace fan discharges the cooled and depressurized gas into the air purification system pipeline. This device effectively solves the problem of cooling and depressurizing the exhaust outlet in high-temperature experiments. It not only cools the exhaust gas to a reasonable temperature for connection to the environmental protection system but also ensures that the furnace pressure is fully released without open flame ejection, guaranteeing the safety of the experimental environment and the stable operation of the experimental system. It has significant practical value and economic benefits.
[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
[0035] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A furnace exhaust cooling and pressure relief device, characterized in that, The system includes a test furnace and a cooling and depressurization device installed at the exhaust port of the test furnace. The exhaust port of the test furnace is horizontally provided with a first exhaust pipe. The cooling and depressurization device includes a cold water tank for primary cooling of the middle section of the first exhaust pipe, a spray tower for secondary cooling of the gas output from the end section of the first exhaust pipe, a gas mixing mechanism for tertiary cooling of the gas treated by the spray tower, and a furnace fan installed at the output end of the gas mixing mechanism. The furnace fan discharges the cooled and depressurized gas into the air purification system pipeline.
2. The furnace exhaust cooling and depressurization device according to claim 1, characterized in that, The first exhaust duct runs horizontally through the cold water tank, and the cold water in the cold water tank completely covers the middle section of the first exhaust duct; the end section of the exhaust duct extends into the spray tower, and the air outlet of the end section of the first exhaust duct is set downward.
3. The furnace exhaust cooling and pressure relief device according to claim 2, characterized in that, The spray tower is equipped with a horizontally placed spray pipe at the top, a spray overflow outlet and a spray drain outlet at the bottom; the cold water tank is equipped with a water inlet at the top and a tank drain outlet at the bottom.
4. The furnace exhaust cooling and depressurization device according to claim 3, characterized in that, It also includes a cooling tower that works in conjunction with the cold water tank and the spray tower. Hot water in the cold water tank is discharged from the tank drain outlet and pumped to the cooling tower for cooling. After cooling, it is pumped back into the cold water tank through the inlet. Hot water in the spray tower is discharged from the spray drain outlet and pumped to the cooling tower for cooling. After cooling, it is pumped back into the spray pipe through the inlet.
5. The furnace exhaust cooling and depressurization device according to claim 4, characterized in that, The top of the spray tower is connected to the furnace blower via a second exhaust duct. The gas mixing mechanism includes a gas mixing pipe installed at the input end of the furnace blower. The end section of the second exhaust duct extends into the gas mixing pipe. The diameter of the gas mixing pipe is larger than that of the second exhaust duct, forming a fresh air inlet.
6. The furnace exhaust cooling and depressurization device according to claim 5, characterized in that, The cold water tank and spray tower are both made of stainless steel.