Tundish system and control method thereof

Abstract

The application discloses a tundish system and a control method thereof. The tundish system comprises a tundish body, a first main pipeline, a first branch pipeline and a second branch pipeline. By opening the first control valve and the fourth control valve, closing the second control valve and the third control valve, the high-temperature flue gas in the working space is forced to be drawn out from the upper water gap area, and is discharged through the fourth control valve. Meanwhile, part of the flue gas is discharged through the discharge valve. The directional suction effect increases the flue gas flow at the upper water gap, overcomes the hindering effect of the original tundish inner baffle and dam on the flue gas flow, greatly improves the initial heating rate of the upper water gap area, and forms a directional flue gas circulation loop by opening the second control valve and operating the power pump to reverse. The high-temperature flue gas directly washes the refractory surface at the upper water gap, rapidly improves the temperature of the area, prolongs the service life of the upper water gap refractory, and eliminates the production accident risks such as water gap erosion, slab quality decline and steel penetration caused by poor baking.

Description

Technical Field

[0001] This application relates to the field of continuous casting tundish technology, and in particular to a tundish system and its control method. Background Technology

[0002] In continuous casting, the tundish, as a crucial refractory container connecting the ladle and the crystallizer, plays a vital role in controlling the temperature of the molten steel, improving its flow conditions, and removing impurities. Before use, the tundish must be thoroughly baked to preheat the refractory material and remove moisture and residual gases, thus preventing production and quality accidents caused by inadequate baking. However, in existing tundish baking technologies, the baffle walls and dams within the ladle severely obstruct the normal flow path of high-temperature flue gas. Combined with limitations in the location and size of the flue gas outlet, this results in significantly insufficient flue gas flow in the upper nozzle area, preventing the actual temperature rise curve of the refractory material at that location from reaching the preset target. This inadequate baking not only drastically shortens the service life of the refractory material but also exacerbates nozzle erosion and reduces slab quality during subsequent steel casting. In severe cases, it can even lead to major production accidents such as steel seepage, posing a serious threat to the continuity of continuous casting production and product quality.

[0003] To address this technical challenge, the first existing solution involves adding a downward suction device at the top of the tundish inlet. This forced suction increases the flow rate of flue gas discharged from the inlet, thereby improving the heating rate of the refractory material in that area. However, this method only improves the flue gas emission at the inlet to a limited extent and cannot fundamentally solve the problem of temperature curve deviation, resulting in significantly insufficient baking effect. The second solution optimizes the bottom structure of the tundish to improve the flow field distribution within the ladle, thereby increasing the flue gas flow rate at the top of the inlet. While this method has some effect from a flow field optimization perspective, structural modifications directly affect the flow state of molten steel during casting, requiring extensive experimental verification and parameter adjustments for the entire casting process. This leads to a lengthy development cycle, high costs, and risks to process stability. The desired innovative technical solution is one that effectively solves the problem of insufficient baking at the top of the inlet, does not interfere with existing casting processes, and has controllable implementation costs. Summary of the Invention

[0004] In view of the deficiencies in the prior art, this application provides an intermediate package system and its control method to solve the problem of insufficient baking of the water inlet in the prior art.

[0005] The above-mentioned objectives of this application are mainly achieved through the following technical solutions: An intermediate package system, the intermediate package system comprising: The package body has a lid on top, a working space inside, a slag discharge port on the upper side wall, and a water inlet at the bottom. The first main pipeline has two ends connected between the slag discharge port and the water inlet, respectively. A power pump is provided on the first main pipeline. The power pump is used to drive air to flow in the forward or reverse direction. A first control valve is provided on the first main pipeline near the water inlet. A second control valve is provided on the first main pipeline near the slag discharge port. A discharge valve is provided on the first main pipeline between the slag discharge port and the second control valve. The first branch is connected to the first main pipeline between the first control valve and the power pump, and the first branch is equipped with a third control valve. The second branch is connected to the first main branch located between the second control valve and the power pump, and the second branch is equipped with a fourth control valve.

[0006] In an optional embodiment, the discharge valve, the third control valve, and the fourth control valve are one-way control valves.

[0007] In an optional embodiment, the water inlet includes a primary water inlet and a secondary water inlet, the first main pipeline is connected to both the primary water inlet and the secondary water inlet, and a first control valve is respectively provided between the first main pipeline and the primary water inlet and the secondary water inlet.

[0008] Based on the same inventive concept, this application also provides a control method applied to the intermediate package system as described above, the control method comprising: During the intermediate baking operation, the first control valve and the fourth control valve are opened simultaneously, the second control valve and the third control valve are closed, and the power pump is operated to drive the flue gas in the working space to be discharged from the fourth control valve through the water inlet and from the exhaust valve. After the baking time is completed, the second control valve is opened, the power pump is reversed, and a portion of the flue gas in the working space is driven to enter the working space through the slag discharge port, the first main pipeline and the water inlet. The flue gas bakes the refractory material at the water inlet. After the refractory material at the water inlet reaches the set temperature, the power pump is stopped, the second control valve and the fourth control valve are closed, and the third control valve is opened. The flue gas in the working space is discharged from the water inlet through the third control valve and from the discharge valve until the baking operation is completed.

[0009] In an optional implementation, after opening the second control valve, the flow rate of the fourth control valve is adjusted until the amount of flue gas flowing through the power pump is 5%-60% of the amount of flue gas flowing through the second control valve.

[0010] In an optional implementation, when the power pump is operated to drive the flue gas in the working space to be discharged from the fourth control valve through the water inlet, the amount of flue gas discharged from the water inlet is 10%-30% of the total flue gas volume.

[0011] In an optional implementation, the first set time is set to 20-45 minutes.

[0012] In an optional embodiment, the first main pipeline is made of a heat-resistant material.

[0013] In an optional embodiment, a temperature sensor is arranged at the water inlet to collect the temperature of the refractory material at the water inlet in real time. When the measured temperature reaches a preset target value, it is determined that the refractory material at the water inlet has reached the set temperature.

[0014] In an optional implementation, after baking for the first set time is completed, the first control valve and the fourth control valve are kept open, while the third control valve is kept closed.

[0015] Compared with the prior art, the advantages of this application are: The intermediate package system in this application includes a package body, a first main pipeline, a first branch pipeline, and a second branch pipeline. The top of the package body is fitted with a package cover, the interior of the package body is provided with a working space, the upper part of the side wall of the package body is provided with a slag discharge port, and the bottom of the package body is provided with a water inlet. The first main pipeline connects to the slag discharge port and the water inlet at both ends. A power pump is installed on the first main pipeline to drive air to flow in either the forward or reverse direction. A first control valve is installed on the first main pipeline near the water inlet, and a second control valve is installed on the first main pipeline near the slag discharge port. A discharge valve is installed on the first main pipeline between the slag discharge port and the second control valve. A first branch is connected to the first main pipeline between the first control valve and the power pump, and a third control valve is installed on the first branch. A second branch is connected to the first main pipeline between the second control valve and the power pump, and a fourth control valve is installed on the second branch.

[0016] This intermediate drum system utilizes a power pump and multiple valves in synergy to achieve precise control of the flue gas flow path and efficient energy utilization. By opening the first and fourth control valves and closing the second and third control valves, the power pump forces the high-temperature flue gas in the working space to be extracted from the inlet area and discharged through the fourth control valve. Simultaneously, some flue gas is discharged through the exhaust valve. The directional suction increases the flue gas flow at the inlet, overcoming the obstruction effect of the original baffles and dams in the intermediate drum on the flue gas flow, thus significantly increasing the initial heating rate of the inlet area.

[0017] During the baking process, by opening the second control valve and reversing the power pump, high-temperature flue gas is drawn in from the slag discharge port and transported to the inlet area via the first main pipeline, forming a directional flue gas circulation loop. This allows the high-temperature flue gas to directly wash over the refractory surface at the inlet, rapidly raising the temperature in that area through both thermal convection and conduction. This not only fully utilizes the furnace's thermal energy and avoids heat waste, but more importantly, it significantly improves the heat exchange efficiency in the inlet area through forced convection, ensuring that the refractory material at this location accurately tracks the preset temperature rise curve and solving the problem of temperature lag at the inlet in traditional baking methods.

[0018] While maintaining the original structure of the tundish, a stable baking effect was achieved through an external piping system and control. No structural modifications to the tundish body were required, avoiding negative impacts on subsequent steel casting processes caused by changes in the internal flow field. This eliminated the drawbacks of long experimental cycles and high costs associated with process adjustments, ensuring the uniformity and controllability of the entire baking process. It also extended the service life of the refractory material at the top nozzle and eliminated the risks of production accidents such as nozzle erosion, slab quality degradation, and steel seepage caused by poor baking. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of the intermediate package system provided in the embodiments of this application; In the diagram: 101, Package body; 102, Package cover; 103, Working space; 104, Slag discharge port; 105, Primary water inlet; 106, Secondary water inlet; 200, First main pipeline; 201, Power pump; 301, First control valve; 302, Second control valve; 303, Third control valve; 304, Fourth control valve; 305, Discharge valve; 401, First branch; 402, Second branch. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that the description of these embodiments is intended to aid in understanding the invention, but does not constitute a limitation thereof. The specific structural and functional details disclosed herein are merely for describing exemplary embodiments of the invention. However, the invention can be embodied in many alternative forms and should not be construed as being limited to the embodiments described herein.

[0022] like Figure 1 As shown, Figure 1 This is a schematic diagram of the structure of an intermediate package system provided in an embodiment of this application; an intermediate package system includes a package body 101, a first main pipeline 200, a first branch pipeline 401, and a second branch pipeline 402, wherein: like Figure 1 As shown, the top of the package body 101 is provided with a cover 102, the inside of the package body 101 is provided with a working space 103, the upper part of the side wall of the package body 101 is provided with a slag discharge port 104, and the bottom of the package body 101 is provided with a water inlet. The ladle body 101 adopts a standardized structure. The top of the ladle body 101 is fitted with a lid 102 through a sealing structure to ensure minimal heat loss during baking. The working space 103 formed inside the ladle body 101 is optimized according to fluid dynamics principles. The slag discharge port 104 located on the upper side wall not only performs the conventional slag discharge function but also serves as a key interface for the flue gas recirculation system. The bottom water inlet area adopts a multi-layer refractory composite structure, and its geometry has been optimized through thermodynamic simulation to withstand the continuous scouring of high-temperature flue gas. It should be noted that all interfaces of the ladle body 101 are equipped with high-temperature resistant sealing devices to ensure the airtightness of the system within the baking temperature range and prevent the intrusion of external cold air from affecting the baking effect.

[0023] like Figure 1 As shown, the two ends of the first main pipeline 200 are respectively connected between the slag discharge port 104 and the water inlet. A power pump 201 is provided on the first main pipeline 200. The power pump 201 is used to drive the air to flow in the forward or reverse direction. A first control valve 301 is provided on the first main pipeline 200 near the water inlet. A second control valve 302 is provided on the first main pipeline 200 near the slag discharge port 104. A discharge valve 305 is provided on the first main pipeline 200 between the slag discharge port 104 and the second control valve 302. like Figure 1 As shown, the first main pipeline 200 can be made of high-temperature resistant alloy material, and the power pump 201 is a reversible high-temperature fan with forward and reverse rotation functions.

[0024] The first branch 401 is connected to the first main pipeline 200 between the first control valve 301 and the power pump 201, and the first branch 401 is provided with a third control valve 303; the second branch 402 is connected to the first main pipeline 200 between the second control valve 302 and the power pump 201, and the second branch 402 is provided with a fourth control valve 304.

[0025] Both the third control valve 303 and the fourth control valve 304 are equipped with position feedback sensors that communicate with the control system in real time to ensure that the valve opening control accuracy meets the set requirements. The entire piping system adopts a modular structure, with each component connected via quick couplings for easy on-site installation and maintenance.

[0026] In actual operation, the system achieves fully automated management of the entire process through an intelligent control unit. During the initial baking stage, the control unit simultaneously opens the first control valve 301 and the fourth control valve 304, and closes the second control valve 302 and the third control valve 303. The power pump 201 operates forward at a set speed, creating a directional negative pressure zone in the inlet area, forcing high-temperature flue gas to flow through this zone, significantly improving the initial heating rate. When the system detects that the temperature in the inlet area reaches a preset threshold or the running time reaches the first set time, the control unit automatically opens the second control valve 302 and simultaneously instructs the power pump 201 to switch its rotation direction. High-temperature flue gas is drawn in from the slag discharge port 104 and transported to the inlet area via the first main pipeline 200, forming a localized high-temperature zone. Forced convection heat transfer rapidly increases the refractory material temperature. When the temperature sensor at the inlet indicates that the target temperature has been reached, the second control valve 302 and the fourth control valve 304 are closed, and the third control valve 303 is opened. The power pump 201 continues to operate forward, discharging residual flue gas through the third branch and the discharge valve 305, while simultaneously performing heat preservation treatment. Throughout the process, the control system dynamically adjusts the speed of the power pump 201 and the valve opening based on real-time temperature data to ensure that the temperature rise curve accurately matches the process requirements.

[0027] like Figure 1 As shown, in an optional embodiment, the intermediate packaging system of this application includes a packaging body 101, a first main pipeline 200, a first branch pipeline 401 and a second branch pipeline 402. The top of the packaging body 101 is provided with a packaging cover 102. The inside of the packaging body 101 is provided with a working space 103. The upper part of the side wall of the packaging body 101 is provided with a slag discharge port 104. The bottom of the packaging body 101 is provided with a water inlet. The first main pipeline 200 has its two ends connected between the slag discharge port 104 and the water inlet, respectively. A power pump 201 is installed on the first main pipeline 200, which is used to drive air to flow in the forward or reverse direction. A first control valve 301 is installed on the side of the first main pipeline 200 near the water inlet, and a second control valve 302 is installed on the side of the first main pipeline 200 near the slag discharge port 104. A discharge valve 305 is installed on the first main pipeline 200 between the slag discharge port 104 and the second control valve 302. A first branch 401 is connected to the first main pipeline 200 between the first control valve 301 and the power pump 201, and a third control valve 303 is installed on the first branch 401. A second branch 402 is connected to the first main pipeline 200 between the second control valve 302 and the power pump 201, and a fourth control valve 304 is installed on the second branch 402.

[0028] This intermediate tundish system utilizes the coordinated action of a power pump 201 and multiple valves to achieve precise control of the flue gas flow path and efficient energy utilization. By opening the first control valve 301 and the fourth control valve 304, and closing the second control valve 302 and the third control valve 303, the power pump 201 drives the high-temperature flue gas in the working space 103 to be forcibly extracted from the inlet area and discharged through the fourth control valve 304. At the same time, some flue gas is discharged through the discharge valve 305. The directional suction increases the flue gas flow at the inlet, overcoming the obstruction effect of the original baffles and dams in the intermediate tundish on the flue gas flow, and significantly increasing the initial heating rate of the inlet area.

[0029] like Figure 1 As shown, during the baking process, by opening the second control valve 302 and operating the power pump 201 to reverse its direction, high-temperature flue gas is drawn in from the slag discharge port 104 and transported to the upper water inlet area via the first main pipeline 200, forming a directional flue gas circulation loop. This allows the high-temperature flue gas to directly wash over the refractory surface at the upper water inlet, rapidly raising the temperature of that area through the combined effects of thermal convection and thermal conduction. This not only fully utilizes the heat energy inside the furnace and avoids heat waste, but more importantly, it significantly improves the heat exchange efficiency of the upper water inlet area through forced convection, ensuring that the refractory material at this location can accurately track the preset temperature rise curve, thus solving the problem of temperature lag at the upper water inlet in traditional baking modes.

[0030] While maintaining the original structure of the tundish, a stable baking effect was achieved through an external piping system and control. No structural modifications to the tundish body were required, avoiding negative impacts on subsequent steel casting processes caused by changes in the internal flow field. This eliminated the drawbacks of long experimental cycles and high costs associated with process adjustments, ensuring the uniformity and controllability of the entire baking process. It also extended the service life of the refractory material at the top nozzle and eliminated the risks of production accidents such as nozzle erosion, slab quality degradation, and steel seepage caused by poor baking.

[0031] like Figure 1 As shown, in an optional embodiment, the discharge valve 305, the third control valve 303, and the fourth control valve 304 are one-way control valves.

[0032] In an optional embodiment, the discharge valve 305, the third control valve 303, and the fourth control valve 304 are designed as one-way control valves, achieving unidirectional flow and reverse shut-off of the medium through the precise fit between the valve core and the valve seat. On one hand, the one-way control valves effectively prevent flue gas backflow that may occur when the power pump 201 reverses or when system pressure fluctuates, avoiding mutual interference between flue gas from different temperature zones and ensuring the accuracy of the baking process. On the other hand, the passive working principle of the one-way control valves eliminates the need for additional control signals and actuators, significantly improving system reliability and response speed while reducing control complexity. In practical applications, the one-way control valves are made of high-temperature resistant alloy steel, which can maintain long-term stable sealing performance under continuous high temperatures.

[0033] like Figure 1 As shown, in an optional embodiment, the water inlet includes a primary water inlet 105 and a secondary water inlet 106. The first main pipeline 200 is connected to both the primary water inlet 105 and the secondary water inlet 106. A first control valve 301 is provided between the first main pipeline 200 and the primary water inlet 105 and the secondary water inlet 106, respectively.

[0034] In an optional implementation, for the application scenario of a dual-strand or multi-strand continuous casting machine, the inlet is set as a first-strand inlet 105 and a second-strand inlet 106, and the two inlets are connected simultaneously through a first main pipeline 200. An independent first control valve 301 is set at the connection between each inlet and the main pipeline. The system can make differentiated adjustments according to the actual temperature feedback of each inlet area, providing reliable technical support for large-scale continuous casting production.

[0035] like Figure 1 As shown, based on the same inventive concept, this application also provides a control method, which is applied to the intermediate package system as described above, and the control method includes: During the intermediate baking operation, the first control valve 301 and the fourth control valve 304 are opened simultaneously, the second control valve 302 and the third control valve 303 are closed, and the power pump 201 is operated to drive the flue gas in the working space 103 to be discharged from the water inlet through the fourth control valve 304 and from the discharge valve 305. After the baking time is completed, the second control valve 302 is opened, the power pump 201 is reversed, and a portion of the flue gas in the working space 103 is driven to enter the working space 103 through the slag discharge port 104, the first main pipeline 200 and the water inlet. The flue gas bakes the refractory material at the water inlet. After the refractory material at the water inlet reaches the set temperature, the power pump 201 is stopped, the second control valve 302 and the fourth control valve 304 are closed, and the third control valve 303 is opened. The flue gas in the working space 103 is discharged from the water inlet through the third control valve 303 and from the discharge valve 305 until the baking operation is completed.

[0036] This control method solves the core problem of insufficient temperature in the upper water inlet area in traditional intermediate bread baking technology through a three-stage baking strategy.

[0037] In the first stage, a directional negative pressure field is established in the inlet area through precise valve combination control. The power pump 201 drives the high-temperature flue gas in the working space 103 to flow from the inlet area through the fourth control valve 304 and be discharged. At the same time, some flue gas is discharged through the exhaust valve 305. This negative pressure suction increases the flue gas flow at the inlet, overcomes the obstruction effect of the original baffles and dams in the tundish on the flue gas flow, and enables the area to obtain sufficient heat exchange in the early stage of baking, rapidly increasing the base temperature.

[0038] In the crucial second stage, after the initial baking for the first set time is completed, the second control valve 302 opens, and the power pump 201 reverses, driving high-temperature flue gas to be drawn in from the slag discharge port 104 and directionally transported to the inlet area via the first main pipeline 200, forming a local high-temperature flue gas circulation loop. This directly and efficiently transfers the heat energy of the high-temperature flue gas in the furnace to the refractory surface at the inlet. During the circulation process, the flue gas significantly increases the convective heat transfer coefficient, increasing the heating rate of the inlet area by 40%, ensuring that the refractory material at this location can accurately track the preset temperature rise curve. More importantly, this stage employs a closed-loop temperature control strategy, dynamically adjusting the speed of the power pump 201 and the flue gas flow rate by real-time monitoring of the refractory temperature at the inlet, thus avoiding the risks of over-baking or under-baking.

[0039] In the third stage, once the refractory material at the inlet reaches the set temperature, the system automatically switches to the final exhaust mode, closing the second control valve 302 and the fourth control valve 304, opening the third control valve 303, and the power pump 201 continues to operate in the forward direction, orderly discharging the residual flue gas through the third branch and the exhaust valve 305. This ensures uniform heat distribution in the later stages of baking and avoids sudden temperature drops caused by pump stoppage. Compared to the existing technology's downward suction device and bottom structure optimization scheme, this control method reliably improves the baking effect through process control while maintaining the original structure of the tundish. The entire control process requires no adjustment to the steel casting process, eliminating the drawbacks of long experimental cycles and high costs associated with structural modifications.

[0040] In an optional embodiment, after opening the second control valve 302, the flow rate of the fourth control valve 304 is adjusted until the amount of flue gas flowing through the power pump 201 is 5%-60% of the amount of flue gas flowing through the second control valve 302.

[0041] In an optional implementation, after opening the second control valve 302, the flow rate of the fourth control valve 304 is precisely adjusted to control the amount of flue gas flowing through the power pump 201 within the range of 5%-60% of the amount of flue gas flowing through the second control valve 302. By establishing a precise proportional relationship between the flue gas flow rate and the flow rate, the system can achieve optimal heat exchange during the flue gas circulation phase. When the proportion is below 5%, the circulating flue gas volume is insufficient, and the temperature in the inlet area cannot be effectively increased. When the proportion exceeds 60%, a large amount of flue gas is directly discharged from the fourth control valve 304, resulting in wasted heat energy and reduced circulation efficiency. Multiple factors are considered, including the internal flow field distribution of the tundish, the thermal conductivity of the refractory material, and the flue gas temperature decay law. In practical applications, by installing high-precision flow meters at the inlet and outlet of the power pump 201, combined with a smart PID controller to adjust the opening of the fourth control valve 304 in real time, the flow rate ratio is ensured to remain stable within the optimal range. This improves heat energy utilization efficiency and shortens the time required for the inlet area to reach the target temperature.

[0042] In an optional embodiment, when the power pump 201 is operated to drive the flue gas in the working space 103 to be discharged from the fourth control valve 304 through the water inlet, the amount of flue gas discharged from the water inlet is 10%-30% of the total flue gas volume.

[0043] In an optional implementation, when the power pump 201 drives the flue gas in the working space 103 to be discharged from the upper water inlet through the fourth control valve 304, the amount of flue gas discharged from the upper water inlet is precisely controlled to be 10%-30% of the total flue gas volume. In the initial stage of baking, if the amount of flue gas discharged from the upper water inlet area is too small, it cannot form a sufficient negative pressure suction effect, resulting in a slow temperature rise in that area; if the discharge volume is too large, it will disrupt the overall thermal balance inside the package, causing insufficient temperature in other areas. The 10%-30% ratio range can specifically enhance the heat exchange in the upper water inlet area while ensuring the overall baking effect.

[0044] In an optional implementation, the first set time is set to 20-45 minutes. Precisely setting the first set time to 20-45 minutes is crucial because, in the baking process, the primary task in the initial stage is to establish a basic temperature field and remove physical moisture from the refractory material. Too short a time will not adequately preheat the inlet area, resulting in poor subsequent cyclic baking effects; too long a time will waste energy and may cause overheating of the cover 102 area, affecting sealing performance.

[0045] In an optional embodiment, the first main pipeline 200 is made of heat-resistant material. The use of heat-resistant material ensures that the first main pipeline 200 maintains structural integrity and sealing performance under continuous scouring by high-temperature flue gas, guaranteeing long-term reliable operation of the system.

[0046] In an optional embodiment, a temperature sensor is arranged at the water inlet to collect the temperature of the refractory material at the water inlet in real time. When the measured temperature reaches a preset target value, it is determined that the refractory material at the water inlet has reached the set temperature.

[0047] The temperature sensor can employ an armored thermocouple structure, with the sensing end directly embedded 5-10mm deep into the refractory material, and the outer layer using a high-temperature resistant ceramic protective sleeve. The signal acquisition system adopts a high-isolation design to effectively resist on-site electromagnetic interference, and dynamically adjusts the parameters of the power pump 201 and the valve opening according to the temperature rise rate to avoid temperature overshoot. This improves the baking pass rate.

[0048] In an optional implementation, after baking for the first set time, the first control valve 301 and the fourth control valve 304 remain open, while the third control valve 303 remains closed. This ensures that the system pressure changes smoothly during the transition between the opening of the second control valve 302 and the reversal of the power pump 201, avoiding pressure shocks and flue gas flow disturbances caused by sudden valve state changes. Keeping the first control valve 301 open provides a safe venting channel for possible abnormal situations after the power pump 201 reversals; keeping the fourth control valve 304 open ensures that some flue gas can still be discharged through this path during the reversal process, maintaining pressure balance within the package. Controlling temperature fluctuations during system switching within a preset range simplifies the complexity of the control program, reduces the risk of misoperation, and improves system reliability.

[0049] It should be understood that the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance. Although the terms "first," "second," etc., may be used herein to describe various units, these units should not be limited by these terms. These terms are only used to distinguish one unit from another. For example, a first unit may be referred to as a second unit, and similarly, a second unit may be referred to as a first unit, without departing from the scope of the exemplary embodiments of the invention.

[0050] It should be understood that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, B exists alone, and A and B exist simultaneously. The term " / and" in this article describes another relationship between related objects, indicating that two relationships can exist. For example, A / and B can mean: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the related objects before and after it are in an "or" relationship.

[0051] It should be understood that in the description of this invention, the terms "upper," "vertical," "inner," "outer," etc., indicate the orientation or positional relationship as commonly placed when the disclosed product is used, or the orientation or positional relationship commonly understood by those skilled in the art. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0052] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" 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 direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0053] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments of the invention. As used herein, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” “containing,” and / or “including” as used herein specify the presence of the stated features, integers, steps, operations, units, and / or components, and do not exclude the presence or addition of one or more other features, quantities, steps, operations, units, components, and / or combinations thereof.

[0054] Specific details are provided in the following description to provide a complete understanding of the exemplary embodiments. However, those skilled in the art will understand that the exemplary embodiments can be implemented without these specific details. In other embodiments, well-known processes, structures, and techniques may be omitted in the depiction of non-essential details to avoid obscuring the exemplary embodiments.

[0055] The above are merely specific embodiments of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

[0056] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art.

Claims

1. A middleware system, characterized in that, The intermediate package system includes: The package body has a lid on top, a working space inside, a slag discharge port on the upper side wall, and a water inlet at the bottom. The first main pipeline has two ends connected between the slag discharge port and the water inlet, respectively. A power pump is provided on the first main pipeline. The power pump is used to drive air to flow in the forward or reverse direction. A first control valve is provided on the first main pipeline near the water inlet side of the power pump. A second control valve is provided on the first main pipeline near the slag discharge port side of the power pump. A discharge valve is provided on the first main pipeline between the slag discharge port and the second control valve. The first branch is connected to the first main pipeline between the first control valve and the power pump, and the first branch is equipped with a third control valve. The second branch is connected to the first main branch located between the second control valve and the power pump, and the second branch is equipped with a fourth control valve.

2. The intermediate package system as described in claim 1, characterized in that: The discharge valve, the third control valve, and the fourth control valve are one-way control valves.

3. The intermediate package system as described in claim 1, characterized in that: The water inlet includes a primary water inlet and a secondary water inlet. The first main pipeline connects to both the primary water inlet and the secondary water inlet, and a first control valve is provided between the first main pipeline and each of the primary and secondary water inlets.

4. A control method, characterized in that: The control method is applied to the intermediate package system as described in any one of claims 2-3, and the control method includes: During the intermediate baking operation, the first control valve and the fourth control valve are opened simultaneously, the second control valve and the third control valve are closed, and the power pump is operated to drive the flue gas in the working space to be discharged from the fourth control valve through the water inlet and from the exhaust valve. After the baking time is completed, the second control valve is opened, the power pump is reversed, and a portion of the flue gas in the working space is driven to enter the working space through the slag discharge port, the first main pipeline and the water inlet. The flue gas bakes the refractory material at the water inlet. After the refractory material at the water inlet reaches the set temperature, the power pump is stopped, the second control valve and the fourth control valve are closed, and the third control valve is opened. The flue gas in the working space is discharged from the water inlet through the third control valve and from the discharge valve until the baking operation is completed.

5. The control method as described in claim 4, characterized in that: After opening the second control valve, adjust the flow rate of the fourth control valve until the amount of flue gas flowing through the power pump is 5%-60% of the amount of flue gas flowing through the second control valve.

6. The control method as described in claim 4, characterized in that: When the power pump is operated to drive the flue gas in the working space to be discharged from the fourth control valve through the water inlet, the amount of flue gas discharged from the water inlet is 10%-30% of the total flue gas volume.

7. The control method as described in claim 4, characterized in that: The first set time is set to 20-45 minutes.

8. The control method as described in claim 4, characterized in that: The first main pipeline is made of heat-resistant material.

9. The control method as described in claim 4, characterized in that: A temperature sensor is installed at the water inlet to collect the temperature of the refractory material at the water inlet in real time. When the measured temperature reaches the preset target value, it is determined that the refractory material at the water inlet has reached the set temperature.

10. The control method as described in claim 4, characterized in that: After the baking time is completed for the first set period, keep the first control valve and the fourth control valve open, and keep the third control valve closed.

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