A petroleum and petrochemical-based radiator expansion system

Abstract

The application relates to an oil and petrochemical-based radiator expansion system, and relates to the technical field of heat dissipation, which is used for heat dissipation of equipment and comprises a radiator, an expansion assembly and a control assembly; the control assembly is electrically connected with the radiator and the expansion assembly respectively; the expansion assembly comprises a plate heat exchanger and a water chiller unit; a water outlet of the equipment is connected with a water inlet of the radiator through a pipeline; a water outlet of the radiator is connected with a secondary-side water inlet of the plate heat exchanger through a pipeline; a secondary-side water outlet of the plate heat exchanger is connected with a water inlet of the equipment through a pipeline; a primary-side water inlet of the plate heat exchanger is connected with water outlets of a plurality of water chiller units through pipelines; and a primary-side water outlet of the plate heat exchanger is connected with a backwater inlet of the water chiller unit through a pipeline, so as to form a circulating loop of the water chiller unit. The application has the effect of effectively expanding the heat dissipation capacity of the oil and petrochemical equipment and ensuring stable operation of the equipment under various working conditions.

Description

Technical Field

[0001] This application relates to the technical field of heat dissipation, and in particular to a radiator expansion system based on petroleum and petrochemicals. Background Technology

[0002] In the oil and petrochemical industry, production equipment generates a lot of heat during operation. If the heat cannot be dissipated in time, the equipment temperature will be too high, which will reduce the operating efficiency of the equipment and may also cause media decomposition, equipment aging, or even safety accidents. Therefore, an efficient heat dissipation system is the key to ensuring the stable operation of oil and petrochemical production equipment.

[0003] In recent years, due to rising global temperatures and frequent extreme heat events, the heat exchange efficiency of traditional radiators has dropped significantly. In addition, a large number of old radiators in factories and stations have reduced their heat dissipation capacity due to aging, scaling and other problems. The heat dissipation capacity of the original radiators can no longer meet the equipment requirements, and the radiators need to be expanded to meet the necessary heat dissipation capacity requirements.

[0004] Currently, the mainstream radiator expansion solutions in the industry fall into two categories: one is to replace the entire radiator, but this solution is costly, has a long construction period, and requires prolonged downtime, causing serious production losses, and is rarely used in practice; the other is to connect additional radiators in series / parallel to the existing radiators, which has become the preferred choice for projects due to its low modification cost and minimal impact on production. However, in this solution, the additional radiators are often directly connected to the original system without independent fault isolation and adjustment structures. Once the additional radiators experience blockages, leaks, or other faults, it will directly cause the entire cooling system circulation to be interrupted, forcing the entire plant equipment to be shut down for maintenance, seriously affecting production continuity, and resulting in low system reliability. Utility Model Content

[0005] To improve the situation where replacing all radiators to expand radiator capacity requires long-term downtime, which can cause serious production losses, or by adding additional radiators in series or parallel to the existing radiators to expand capacity, if the additional radiators experience blockages, leaks, or other malfunctions, the entire cooling system circulation will be interrupted, affecting production continuity and resulting in low system reliability, this application provides a radiator expansion system based on the petroleum and petrochemical industry.

[0006] This application provides a radiator expansion system based on the petroleum and petrochemical industry, which adopts the following technical solution: A radiator expansion system based on petroleum and petrochemical industry is used to dissipate heat from equipment. It includes a radiator, an expansion component, and a control component, wherein the control component is electrically connected to the radiator and the expansion component respectively. The expansion assembly includes a plate heat exchanger and a chiller unit. The outlet of the equipment is connected to the inlet of the radiator via a pipeline. The outlet of the radiator is connected to the secondary inlet of the plate heat exchanger via a pipeline. The secondary outlet of the plate heat exchanger is connected to the inlet of the equipment via a pipeline. The primary inlet of the plate heat exchanger is connected to the outlets of several chiller units via a pipeline. The primary outlet of the plate heat exchanger is connected to the return outlet of the chiller unit via a pipeline, forming a circulation loop for the chiller unit.

[0007] By adopting the above technical solution, the heat generated by the equipment enters the radiator for initial heat dissipation through the outlet. Then, the hot water flows into the secondary side of the plate heat exchanger, while the chilled water provided by the chiller unit circulates on the primary side of the plate heat exchanger. The two exchange heat through the plate heat exchanger; the chilled water absorbs heat from the hot water and flows back to the chiller unit for cooling. The cooled hot water then flows back to the equipment inlet, achieving continuous heat dissipation for the equipment. The expansion component, utilizing the plate heat exchanger and chiller unit, adds an independent heat dissipation loop without affecting the original radiator, effectively improving the overall heat dissipation capacity to cope with extreme high temperatures or high-load heat generation, ensuring stable equipment operation.

[0008] Optionally, a water pump unit is provided between the primary outlet of the plate heat exchanger and the return outlet of the chiller unit, and the control component is electrically connected to the water pump unit.

[0009] By adopting the above technical solution, the water pump unit provides power to the chiller unit's circulation loop, ensuring smooth flow of chilled water between the primary side of the plate heat exchanger and the chiller unit. The control components can adjust the operating parameters (such as speed) of the water pump unit according to system requirements (such as temperature sensor feedback and equipment operating status), control the chilled water flow, and thus adjust the heat exchange efficiency, so that the heat dissipation effect is more matched with the heat generation of the equipment.

[0010] Optionally, the pump unit includes a main pump and an auxiliary pump, which are connected in parallel between the primary outlet of the plate heat exchanger and the return outlet of the chiller unit.

[0011] By adopting the above technical solution, the main water pump and the auxiliary water pump are connected in parallel. Under normal circumstances, the main water pump works while the auxiliary water pump is on standby. If the main water pump fails, the auxiliary water pump can be started immediately, ensuring that the circulation loop of the chiller unit is not interrupted, improving the reliability and continuity of system operation, and avoiding the paralysis of the heat dissipation system due to water pump failure, which would affect the production of petroleum and petrochemical equipment.

[0012] Optionally, the plate heat exchanger is equipped with an electric three-way valve at the primary side inlet and a temperature sensor at the secondary side outlet. The control component is communicatively connected to the electric three-way valve, the temperature sensor, and the chiller unit.

[0013] By adopting the above technical solution, the temperature sensor monitors the water temperature at the secondary side outlet of the plate heat exchanger in real time and transmits the data to the control component. Based on the water temperature, the control component controls the electric three-way valve to adjust the flow rate of chilled water entering the primary side of the plate heat exchanger, and simultaneously regulates the operation of the chiller unit, such as start / stop and cooling power. When the water temperature is high, the chilled water flow rate is increased, and the chiller unit's cooling power is enhanced to improve heat dissipation; when the water temperature is low, the chilled water flow rate is reduced, and the cooling power is lowered, achieving intelligent regulation that ensures both effective heat dissipation and energy conservation.

[0014] Optionally, the inlet and outlet of the primary side of the plate heat exchanger, the inlet and outlet of the secondary side of the plate heat exchanger are all equipped with isolation valves.

[0015] By adopting the above technical solution, the isolation valve can isolate the primary or secondary piping of the corresponding plate heat exchanger when the system is under maintenance or a certain part fails. This facilitates the repair of the faulty part (such as the plate heat exchanger and related piping) without affecting the normal operation of other parts, thereby improving the maintainability of the system and reducing the impact of maintenance on production.

[0016] Optionally, an expansion tank is provided between the primary outlet of the plate heat exchanger and the chiller unit.

[0017] By adopting the above technical solution, the expansion tank is used to balance the water volume changes in the chiller unit's circulation loop. When the system water temperature rises and the water volume expands, the expansion tank can accommodate the expanded water; when the water temperature drops and the water volume contracts, the expansion tank can replenish water to maintain stable system pressure and avoid excessive pressure fluctuations in the pipeline caused by water volume changes, which could damage equipment or affect the normal operation of the system.

[0018] Optionally, a buffer tank is provided between the primary outlet of the plate heat exchanger and the chiller unit.

[0019] By adopting the above technical solution, the buffer tank can buffer the water flow in the chiller unit's circulation loop, reduce water flow pulsation, make the chilled water flow more stable, and store a certain amount of chilled water. When the system load changes suddenly, it can respond quickly, ensure the stability of the chilled water supply, and thus maintain the stability of the heat exchange process and improve the anti-interference capability of the heat dissipation system.

[0020] Optionally, the expansion assembly further includes a short-circuit valve, one end of which is connected to the secondary side inlet of the plate heat exchanger via a pipeline, and the other end of which is connected to the secondary side outlet of the plate heat exchanger via a pipeline.

[0021] By adopting the above technical solution, when the plate heat exchanger or chiller unit malfunctions and cannot be repaired in a short time, the short-circuit valve can be opened to allow the hot water from the radiator outlet to flow directly back to the equipment inlet, so that the original radiator can continue to dissipate heat. This avoids the entire heat dissipation system from failing due to the failure of the expansion component, ensuring that the equipment can still operate to a certain extent and reducing production losses.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. This system forms an independent expanded heat dissipation loop with the chiller unit through a plate heat exchanger. Combined with the original radiator, it improves the heat dissipation capacity and can effectively cope with extreme high temperature weather and high load heat generation of equipment, ensuring the stable operation of oil and petrochemical production equipment and avoiding failures caused by excessive temperature. 2. The system is equipped with a variety of intelligent control and protection components, such as electric three-way valves, temperature sensors, main and auxiliary water pumps, and isolation valves, to achieve precise adjustment of heat dissipation and high reliability of system operation. This not only improves the energy efficiency and accuracy of heat dissipation, but also reduces the impact of failures on production and makes maintenance convenient. Attached Figure Description

[0023] Figure 1 This is a structural schematic diagram of an embodiment of this application.

[0024] Explanation of reference numerals in the attached figures: 1. Equipment; 2. Radiator; 3. Expansion assembly; 31. Plate heat exchanger; 32. Chiller unit; 33. Pump unit; 331. Main pump; 332. Auxiliary pump; 34. Electric three-way valve; 35. Temperature sensor; 36. Isolation valve; 37. Expansion tank; 38. Buffer tank; 39. Short-circuit valve. Detailed Implementation

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other.

[0026] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] The following is in conjunction with the appendix Figure 1 This application will be described in further detail.

[0029] This application discloses a radiator expansion system based on the petroleum and petrochemical industry, referring to... Figure 1 A radiator expansion system based on petroleum and petrochemicals is used to dissipate heat from equipment 1. It includes a radiator 2, an expansion component 3, and a control component. The control component is electrically connected to the radiator 2 and the expansion component 3, respectively. The expansion assembly 3 includes a plate heat exchanger 31 and a chiller unit 32. The outlet of the equipment 1 is connected to the inlet of the radiator 2 through a pipeline. The outlet of the radiator 2 is connected to the secondary inlet of the plate heat exchanger 31 through a pipeline. The secondary outlet of the plate heat exchanger 31 is connected to the inlet of the equipment 1 through a pipeline. The primary inlet of the plate heat exchanger 31 is connected to the outlets of several chiller units 32 through a pipeline. The primary outlet of the plate heat exchanger 31 is connected to the return outlet of the chiller unit 32 through a pipeline, forming a circulation loop of the chiller unit 32.

[0030] In this system, radiator 2 directly dissipates the high-temperature medium (such as hot water) flowing out of the outlet of device 1. Through its own heat dissipation structure, such as fins and pipes, it exchanges heat with the outside air or other cooling media to reduce the temperature of the medium. Under normal operating conditions, it can meet the heat dissipation requirements of device 1, ensuring that device 1 can operate stably under normal conditions and avoid overheating.

[0031] In the expansion component 3, the plate heat exchanger 31 connects the original radiator 2 loop to the chiller unit 32 circulation loop. Its secondary side is connected to the original radiator 2 loop, receiving the medium after initial cooling by the radiator 2; its primary side is connected to the chiller unit 32 circulation loop, introducing low-temperature chilled water from the chiller unit 32. Through heat transfer between the plates, heat exchange is achieved between the secondary-side medium and the primary-side chilled water, realizing heat transfer between the original heat dissipation system and the newly added chiller unit 32 heat dissipation system. Without interfering with the normal operation of the original radiator 2, the chiller unit 32's cold source further reduces the medium temperature, effectively improving the overall heat dissipation capacity, enabling the system to cope with extreme high temperatures or high-load heat generation from equipment 1. Simultaneously, the plate heat exchanger 31 features high heat exchange efficiency and a compact structure, enabling efficient heat exchange within a small space and saving system installation space.

[0032] The chiller unit 32 provides continuous low-temperature chilled water to the primary side of the plate heat exchanger 31, serving as the core of the cold source for expanded heat dissipation. Through its own refrigeration system (such as a compressor, evaporator, and condenser), the water is cooled to the required temperature and then transported to the primary side of the plate heat exchanger 31. After absorbing heat from the secondary side medium, the water flows back to the chiller unit 32 for cyclic refrigeration, providing a stable low-temperature cold source. This ensures that the plate heat exchanger 31 can continuously and efficiently exchange heat, thereby significantly improving the heat dissipation capacity of the entire system. Even when facing high-temperature environments or increased heat generation from equipment 1, the system can still control the medium temperature within a reasonable range, ensuring the stable operation of the petroleum and petrochemical equipment 1 and preventing equipment 1 malfunctions or safety accidents caused by excessively high temperatures.

[0033] The control component is electrically connected to the radiator 2 (whose operating parameters can be obtained through relevant sensors and other components) and the expansion component 3 (such as the chiller unit 32, the water pump unit 33, the electric three-way valve 34, etc.). It receives operating data (such as temperature, pressure, etc.) from each part and sends control commands to the expansion component 3 according to the preset control logic or real-time operating conditions to adjust its operating status. This realizes intelligent and automated control of the entire heat dissipation and expansion system. It can automatically adjust the cooling power of the chiller unit 32, the flow rate of the water pump unit 33, the opening degree of the electric three-way valve 34, etc., according to the actual heat generation of the equipment 1 and the external ambient temperature, so that the heat dissipation effect is precisely matched with the needs of the equipment 1, which not only ensures the effectiveness of heat dissipation, but also avoids energy waste and improves the energy efficiency and operating efficiency of the system.

[0034] This radiator expansion system based on petroleum and petrochemical industry constructs an independent new heat dissipation circuit on the basis of the original radiator 2 through expansion component 3 (plate heat exchanger 31 and chiller unit 32). The control component is used to intelligently regulate the entire system (including the original radiator 2 and expansion component 3) to effectively expand the heat dissipation capacity of petroleum and petrochemical equipment 1 and ensure that equipment 1 can operate stably under various working conditions (especially under extreme high temperature or high load heat generation).

[0035] A water pump unit 33 is installed between the primary side outlet of the plate heat exchanger 31 and the return outlet of the chiller unit 32. The control component is electrically connected to the water pump unit 33. The water pump unit 33 is the power core of the chiller unit 32's circulation loop, providing driving force for the flow of chilled water within the loop. It can adjust its operating state (such as speed) according to the instructions of the control component, controlling the flow rate and pressure of the chilled water to ensure that the chilled water can circulate stably through the primary side of the plate heat exchanger 31 and the chiller unit 32, completing the cycle of heat absorption and cooling. This ensures that the primary side of the plate heat exchanger 31 can continuously obtain low-temperature chilled water for efficient heat exchange with the high-temperature medium on the secondary side, thereby achieving a heat dissipation expansion effect. At the same time, in conjunction with the regulation of the control component, the chilled water flow rate can be flexibly adjusted to avoid excessive flow causing energy waste or insufficient flow causing insufficient heat dissipation, ensuring that the heat dissipation efficiency is precisely matched with the heat production requirements of the equipment 1, improving the system's economic efficiency and adaptability.

[0036] The control component acquires system operating data in real time (such as the secondary side outlet temperature of plate heat exchanger 31, operating status of chiller unit 32, etc.) via electrical connection, and sends control commands to pump unit 33 according to preset logic or actual operating conditions to adjust parameters such as start / stop and speed of pump unit 33, achieving precise control of chilled water circulation power and avoiding energy loss caused by continuous constant operation of pump unit 33. When the heat output of equipment 1 decreases (such as a decrease in operating load) or the ambient temperature drops, the control component can reduce the pump speed and decrease the chilled water flow; when the heat output of equipment 1 increases (such as high load operation) or extreme high temperature, it can increase the pump speed and increase the chilled water flow to ensure that the heat dissipation effect always meets the requirements. At the same time, the automation control reduces manual intervention, lowers the difficulty of operation, avoids the problem of heat dissipation lag caused by untimely manual adjustment, and ensures that the petrochemical equipment 1 always operates within a safe temperature range.

[0037] refer to Figure 1The water pump unit 33 includes a main water pump 331 and an auxiliary water pump 332. The main water pump 331 and the auxiliary water pump 332 are connected in parallel between the primary side outlet of the plate heat exchanger 31 and the return water inlet of the chiller unit 32. The main water pump 331 is the main power output component of the water pump unit 33. Under normal operating conditions, it undertakes the task of circulating and transporting chilled water between the primary side outlet of the plate heat exchanger 31 and the return water inlet of the chiller unit 32, providing continuous and stable power for the chilled water circulation loop, ensuring that the chilled water can flow smoothly through the plate heat exchanger 31 and exchange heat with the high-temperature medium on the secondary side, ensuring that the heat generated by the petroleum and petrochemical equipment 1 can be effectively removed under normal production conditions, and maintaining the stable operation of the equipment 1.

[0038] The auxiliary water pump 332 is a backup power component for the main water pump 331 and is connected in parallel with the main water pump 331. When the main water pump 331 fails, the auxiliary water pump 332 can start immediately, take over the work of the main water pump 331, and continue to provide power to the cold water circulation loop, ensuring that the cold water circulation is uninterrupted. This prevents the cold water circulation from stopping due to the failure of the main water pump 331, thereby preventing the heat dissipation system from failing. It ensures that the petroleum and petrochemical equipment 1 can still receive continuous heat dissipation when the main water pump 331 fails, reducing the risk of production interruption caused by overheating of equipment 1, and improving the reliability and continuity of the entire heat dissipation expansion system.

[0039] An electric three-way valve 34 is installed at the primary side inlet of the plate heat exchanger 31, and a temperature sensor 35 is installed at the secondary side outlet. The control component is communicatively connected to the electric three-way valve 34, the temperature sensor 35, and the chiller unit 32. The electric three-way valve 34 is a component for regulating the flow rate and direction of chilled water. It can adjust the valve core opening or switch the water flow path according to the instructions of the control component to control the flow rate of chilled water entering the primary side of the plate heat exchanger 31. It can regulate the amount of chilled water input and, under specific operating conditions (such as when the heat dissipation demand is low), control some chilled water from entering the plate heat exchanger 31, thus achieving flexible flow distribution. By precisely controlling the amount of chilled water input, it ensures that the cooling supply on the primary side of the plate heat exchanger 31 matches the heat dissipation demand on the secondary side, avoiding energy waste due to excessive chilled water or insufficient heat dissipation due to insufficient chilled water. Meanwhile, its adjustable characteristics allow the heat dissipation system to dynamically adjust according to the heat generated by device 1, improving the flexibility and energy efficiency of system operation and avoiding the impact of imbalance in cooling supply on the heat dissipation effect of device 1.

[0040] Temperature sensor 35 collects the temperature of the medium flowing out of plate heat exchanger 31 in real time and continuously transmits the temperature data to the control component, providing data basis for the control component to judge the heat dissipation effect and adjust the system operating status. If the temperature is too high, it indicates insufficient heat dissipation; if the temperature is too low, it indicates excessive cooling supply. Timely and accurate temperature data transmission avoids inaccurate control due to information lag in the control component.

[0041] The control component receives real-time data from the temperature sensor 35 via a communication connection. Combined with a preset temperature threshold, it analyzes the current heat dissipation conditions and then sends flow regulation commands to the electric three-way valve 34 and start / stop or cooling power adjustment commands to the chiller unit 32. This achieves automated and precise control of the entire heat dissipation process, replacing manual adjustment, reducing human error and response delay, and ensuring the system can quickly respond to changes in heat dissipation demand. When the temperature sensor 35 detects that the medium temperature is too high, the control component can immediately instruct the electric three-way valve 34 to increase the chilled water flow and instruct the chiller unit 32 to increase the cooling power, rapidly enhancing heat dissipation. When the temperature is too low, the control component reverses the flow to avoid energy waste. Simultaneously, through multi-component coordinated control, the heat dissipation system is always in a highly efficient and energy-saving operating state, improving the overall system efficiency and reliability.

[0042] refer to Figure 1 Each of the plate heat exchanger 31, including its primary side inlet, primary side outlet, secondary side inlet, and secondary side outlet, is equipped with an isolation valve 36. The primary side inlet isolation valve 36 of the plate heat exchanger 31 serves as a control switch for cold water entering the primary side, and can be manually or automatically (in conjunction with the control components) to open or close the pipeline. Under normal operating conditions, it remains open to ensure smooth entry of cold water into the plate heat exchanger 31. When maintenance is required on the primary side pipeline, plate heat exchanger 31, or chiller unit 32, closing this valve can block the cold water input, preventing cold water leakage or interference with maintenance operations.

[0043] The primary side outlet isolation valve 36 of the plate heat exchanger 31 controls the flow of primary side chilled water. During normal operation, it remains open to allow the chilled water that has absorbed heat to flow smoothly back to the chiller unit 32. When inspecting the primary side pipeline, plate heat exchanger 31, or chiller unit 32, closing this valve can block the outflow of residual chilled water inside the primary side, while preventing external impurities from entering the primary side pipeline, thus ensuring a clean maintenance environment and pipeline cleanliness.

[0044] The secondary side inlet isolation valve 36 of the plate heat exchanger 31 controls the flow of the high-temperature medium, after initial cooling by the radiator 2, into the secondary side. It is open during normal operation to ensure the medium can enter the plate heat exchanger 31 and exchange heat with the primary side cold water. When maintenance is required on the secondary side piping, plate heat exchanger 31, or the existing radiator 2, closing this valve blocks the medium input, preventing leakage or disruption to maintenance. This avoids safety risks caused by high-temperature medium leakage during maintenance, or the loss of medium from the equipment 1 affecting subsequent operation.

[0045] The secondary side outlet isolation valve 36 of the plate heat exchanger 31 controls the flow of the low-temperature medium after heat exchange. It is open during normal operation to allow the cooled medium to flow smoothly back to equipment 1. When inspecting the secondary side piping or plate heat exchanger 31, closing this valve can prevent the outflow of residual medium from the secondary side and prevent external impurities from entering the secondary side piping, thus protecting the cleanliness of the medium circulation system and improving the flexibility and safety of system maintenance.

[0046] An expansion tank 37 is installed between the primary side outlet of the plate heat exchanger 31 and the chiller unit 32. The expansion tank 37 is a pressure balancing and volume compensation component for the chilled water circulation loop. Internally, it is separated into an air chamber and a water chamber by an air bladder or diaphragm. When the chilled water in the loop expands due to temperature changes (such as heating up after absorbing heat), the expanded water enters the water chamber of the expansion tank 37, compressing the air chamber. When the chilled water temperature decreases and its volume contracts, the pressure in the air chamber pushes the water in the water chamber back into the loop, replenishing the water volume gap in the pipeline. This prevents drastic pressure fluctuations in the pipeline due to changes in chilled water volume, preventing damage to pipelines, valves, or chiller unit 32 components due to excessive pressure. It also prevents vacuum formation in the pipeline due to excessively low pressure, avoiding air ingress that could cause cavitation or affect water circulation efficiency. Simultaneously, by automatically compensating for water volume, it maintains a stable water volume in the loop, ensuring that chilled water flows continuously and evenly through all components, guaranteeing the stability of the heat exchange process, and preventing a decrease in heat dissipation efficiency due to insufficient water volume.

[0047] A buffer tank 38 is installed between the primary side outlet of the plate heat exchanger 31 and the chiller unit 32. The buffer tank 38 is a water flow regulation and flow stabilization component in the chilled water circulation loop. It has a cavity with a certain volume to temporarily store the chilled water flowing out from the primary side of the plate heat exchanger 31 and then smoothly deliver the chilled water to the chiller unit 32. When the water flow in the loop pulsates or fluctuates due to pump start-up and shutdown, valve adjustment, or load changes, the buffer tank 38 buffers the water flow impact through its cavity volume, balances the difference in inlet and outlet water flow, avoids water flow pulsation causing impact damage to the pipeline, valves, and chiller unit 32, reduces equipment noise and vibration caused by unstable water flow, and extends the service life of the pipeline and equipment 1. At the same time, by stabilizing the output flow rate, the chiller unit 32 can receive continuous and uniform water intake, avoiding fluctuations in the cooling efficiency of the chiller unit 32 due to sudden changes in flow rate, ensuring that the chiller unit 32 is always in a stable operating state, thereby maintaining the continuity and efficiency of heat exchange between the plate heat exchanger 31 and the chiller unit 32.

[0048] The expansion assembly 3 also includes a short-circuit valve 39. One end of the short-circuit valve 39 is connected to the secondary side inlet of the plate heat exchanger 31 via a pipeline, and the other end is connected to the secondary side outlet of the plate heat exchanger 31 via a pipeline. The short-circuit valve 39 is a key emergency regulating component of the expansion assembly 3. The short-circuit valve 39 is directly connected to the inlet and outlet of the secondary side of the plate heat exchanger 31 via a pipeline, forming an emergency passage that bypasses the plate heat exchanger 31. Under normal operating conditions, the short-circuit valve 39 is in the closed state and does not affect the normal heat exchange process of the medium in the plate heat exchanger 31. When the plate heat exchanger 31 or its associated primary side components (such as the chiller unit 32 and related pipelines) malfunction and cannot perform normal heat exchange, the short-circuit valve 39 can be opened, allowing the medium that has undergone preliminary heat dissipation by the radiator 2 to flow directly back to the inlet of the equipment 1 through this passage without having to flow through the malfunctioning plate heat exchanger 31. The short-circuit valve 39 prevents the medium from stagnating in the secondary pipeline due to a failure of the plate heat exchanger 31 or primary side components. This ensures continuous circulation of the medium within the circuit of equipment 1, radiator 2, short-circuit valve 39, and equipment 1, providing basic heat dissipation for equipment 1 and preventing rapid temperature rise due to interruption of medium circulation. Simultaneously, it eliminates the need to shut down the entire cooling system or the petrochemical equipment 1 due to a failure of the plate heat exchanger 31; simply opening the short-circuit valve 39 switches the operating path, confining the impact of the failure to the expansion component 3 and reducing interference with the core production equipment 1. With the short-circuit valve 39 open, equipment 1 can maintain basic cooling operation, eliminating the need for emergency shutdowns and allowing ample time for inspection and replacement of the plate heat exchanger 31 or related components, thus reducing the risk of secondary failures caused by rushed repairs. The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A radiator expansion system based on petroleum and petrochemical industry, used for heat dissipation of equipment (1), characterized in that: It includes a heat sink (2), an expansion component (3), and a control component, wherein the control component is electrically connected to the heat sink (2) and the expansion component (3), respectively; The expansion assembly (3) includes a plate heat exchanger (31) and a chiller unit (32). The outlet of the device (1) is connected to the inlet of the radiator (2) through a pipeline. The outlet of the radiator (2) is connected to the secondary inlet of the plate heat exchanger (31) through a pipeline. The secondary outlet of the plate heat exchanger (31) is connected to the inlet of the device (1) through a pipeline. The primary inlet of the plate heat exchanger (31) is connected to the outlets of several chillers (32) through a pipeline. The primary outlet of the plate heat exchanger (31) is connected to the return outlet of the chiller unit (32) through a pipeline, forming a circulation loop of the chiller unit (32).

2. The radiator expansion system based on petroleum and petrochemical industry according to claim 1, characterized in that: A water pump unit (33) is provided between the primary outlet of the plate heat exchanger (31) and the return outlet of the chiller unit (32), and the control component is electrically connected to the water pump unit (33).

3. The radiator expansion system based on petroleum and petrochemical industry according to claim 2, characterized in that: The pump unit (33) includes a main pump (331) and an auxiliary pump (332), which are connected in parallel between the primary outlet of the plate heat exchanger (31) and the return outlet of the chiller unit (32).

4. The radiator expansion system based on petroleum and petrochemical industry according to claim 1, characterized in that: The plate heat exchanger (31) is equipped with an electric three-way valve (34) at the primary side inlet and a temperature sensor (35) at the secondary side outlet. The control component is communicatively connected to the electric three-way valve (34), the temperature sensor (35), and the chiller unit (32).

5. The radiator expansion system based on petroleum and petrochemical industry according to claim 1, characterized in that: Isolation valves (36) are provided at the primary side inlet, the primary side outlet, the secondary side inlet, and the secondary side outlet of the plate heat exchanger (31).

6. The radiator expansion system based on petroleum and petrochemical industry according to claim 1, characterized in that: An expansion tank (37) is provided between the primary side outlet of the plate heat exchanger (31) and the chiller unit (32).

7. The radiator expansion system based on petroleum and petrochemical industry according to claim 1, characterized in that: A buffer tank (38) is provided between the primary side outlet of the plate heat exchanger (31) and the chiller unit (32).

8. The radiator expansion system based on petroleum and petrochemical industry according to claim 1, characterized in that: The expansion assembly (3) also includes a short-circuit valve (39), one end of which is connected to the secondary side inlet of the plate heat exchanger (31) via a pipeline, and the other end is connected to the secondary side outlet of the plate heat exchanger (31) via a pipeline.

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