An emergency power supply system for a metallurgical furnace circulating water system
By introducing thyristor static switching cabinets and energy storage battery systems into the circulating water system of metallurgical furnaces and kilns, combined with intelligent monitoring modules and central control systems, the problems of emergency power supply delay and high maintenance costs in the event of power failure in the circulating water system of metallurgical furnaces and kilns have been solved, achieving fast and reliable multi-level power supply switching and extending system life.
Patent Information
- Application Number
- CN202521775283.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-20
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-08-20
AI Technical Summary
In the event of a power outage, the emergency power supply startup of the diesel generator in the circulating water system of metallurgical furnaces is delayed, posing a safety hazard and resulting in high maintenance costs. Furthermore, the energy storage emergency solution lacks intelligent monitoring and multi-level backup capabilities, making it difficult to meet the needs of complex industrial scenarios.
The system employs parallel-connected thyristor static switching switchgear and circuit breakers, combined with a three-level power supply system of energy storage battery and diesel generator. Through intelligent monitoring modules and a central control system, it achieves rapid switching and real-time monitoring, ensuring power supply reliability and system lifespan.
It enables rapid emergency power supply switching, reduces manual maintenance costs, improves the system's multi-level backup capability and battery protection, adapts to both short-term and long-term power outage scenarios, and ensures the cooling needs of metallurgical furnaces.
Smart Images
Figure CN224683940U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of energy security technology in the metallurgical industry, and relates to an emergency power supply system for circulating water systems in metallurgical furnaces. Background Technology
[0002] Metallurgical furnace circulating water systems require continuous operation to prevent overheating and damage to the furnace body, and their power supply reliability is directly related to production safety. Currently, in the event of a mains power failure, diesel generators are often used as emergency power sources, but these have a startup delay, which is usually greater than 10 seconds, posing a production safety hazard. Furthermore, diesel generator power supply systems also suffer from high maintenance costs and large carbon emissions. In addition, some energy storage emergency solutions can only achieve simple switching of the power supply system, lacking battery protection, intelligent monitoring, and multi-level backup capabilities, making it difficult to meet the needs of complex industrial scenarios. Utility Model Content
[0003] The purpose of this utility model is to address the problems existing in the prior art by providing an emergency power supply system for metallurgical furnace circulating water systems. This system solves the problems of existing emergency power supply systems for metallurgical furnace circulating water systems, which suffer from start-up delays due to power failures, which are detrimental to production safety. Furthermore, these systems have high maintenance costs and large carbon emissions. Additionally, some energy storage emergency solutions can only achieve simple switching of the power supply system and lack battery protection, intelligent monitoring, and multi-level backup capabilities, making it difficult to meet the needs of complex industrial scenarios.
[0004] Therefore, the present invention adopts the following technical solution: An emergency power supply system for a circulating water system in a metallurgical furnace includes a thyristor static switching cabinet and a first circuit breaker arranged in parallel, both of which are electrically connected to the mains power supply line via a transfer switch; the thyristor static switching cabinet is equipped with a current transformer, a second circuit breaker, and a thyristor switching switch arranged in series. The thyristor switching device is electrically connected to the energy storage power supply line, and the energy storage power supply line is electrically connected to the third circuit breaker assembly and the energy storage battery system respectively. The third circuit breaker assembly is connected in series with the load module. The third circuit breaker assembly includes a number of circuit breakers arranged in parallel. The load module includes a return water pump and a supply water pump. The return water pump and the supply water pump are connected in series with the circuit breakers in the third circuit breaker assembly, one by one. The energy storage battery system includes an energy storage converter, a battery cabinet, and a battery management system connected in series. The other end of the first circuit breaker is connected in series with the three-level backup power supply, the intelligent monitoring module and the central control system; the intelligent monitoring module is also electrically connected to the thyristor static switching cabinet and the energy storage battery system.
[0005] The mains power supply line is connected in series with the fourth circuit breaker and the transformer.
[0006] Specifically, the central control system adopts a DCS control system; the three-level backup power supply adopts a diesel generator; the intelligent monitoring module includes several sensors, which are used to collect the power quality of the mains power supply line, the operating parameters of the return water pump and the supply water pump, and the environmental data of the battery cabinet, and upload them to the central control system.
[0007] The beneficial effects of this utility model are as follows: This invention overcomes the limitations of a single emergency power source by employing a three-tiered power supply system consisting of mains power, energy storage, and a diesel generator. This system adapts to both short-term and long-term power outages, ensuring the reliability of multi-tiered power supply. Furthermore, intelligent monitoring and central control enable real-time parameter monitoring, remote early warning, and automatic scheduling, reducing manual maintenance costs. Additionally, real-time battery status monitoring prevents overcharging and over-discharging, extending system lifespan. Finally, the load module retains only the water supply and return pumps, focusing on the core functions of the circulating water system, simplifying control logic while ensuring the basic cooling requirements of the furnace. Attached Figure Description
[0008] Figure 1 This is a schematic diagram of the circuit structure of this utility model.
[0009] In the diagram, 1-Mainland power supply line; 2-Thyristor static switching cabinet; 3-Thyristor switching switch; 4-Energy storage power supply line; 5-Return water pump; 6-Sending water pump; 7-Load module; 8-Energy storage converter; 9-Energy storage battery system; 10-Battery cabinet; 11-Intelligent monitoring module; 12-Central control system; 13-Three-level backup power supply; 14-Battery management system; 15-Changeover switch; 16a-First circuit breaker; 16b-Second circuit breaker; 16c-Third circuit breaker assembly; 16d-Fourth circuit breaker; 17-Transformer; 18-Current transformer. Detailed Implementation
[0010] The technical solution of this utility model will be described below with reference to the accompanying drawings and implementation methods.
[0011] like Figure 1 As shown, an emergency power supply system for a circulating water system in a metallurgical furnace includes a thyristor static transfer switch cabinet 2 and a first circuit breaker 16a arranged in parallel. Both are electrically connected to the mains power supply line 1 via a transfer switch 15. Specifically, the transfer switch 15 is an ATS automatic transfer switch.
[0012] The thyristor static switching cabinet 2 is equipped with a current transformer 18, a second circuit breaker 16b and a thyristor switching switch 3 arranged in series; among them, the thyristor switching switch 3 is used for rapid switching between mains power and energy storage power supply, with a response time of 10ms, to ensure uninterrupted operation of the load module 7.
[0013] The thyristor switching switch 3 is electrically connected to the energy storage power supply line 4, which is electrically connected to the third circuit breaker assembly 16c and the energy storage battery system 9. The third circuit breaker assembly 16c is connected in series with the load module 7, and includes several circuit breakers arranged in parallel. The load module 7 includes a return water pump 5 and a supply water pump 6, which are directly related to the core water circulation function of the circulating water system to ensure the basic cooling requirements of the furnace. The return water pump 5 and the supply water pump 6 are connected in series with the circuit breakers in the third circuit breaker assembly 16c, one by one.
[0014] The energy storage battery system 9 includes an energy storage converter 8, a battery cabinet 10, and a battery management system 14 connected in series. Specifically, the battery cabinet 10 uses 280Ah lithium iron phosphate cells, and the battery management system 14 monitors the battery status in real time, including battery voltage, temperature, and state of charge. The energy storage converter 8 enables AC / DC conversion and charge / discharge control, and a single full charge can support the load module 7 to operate at full load for 2 hours.
[0015] The other end of the first circuit breaker 16a is connected in series with the third-level backup power supply 13, the intelligent monitoring module 11 and the central control system 12. Specifically, the third-level backup power supply 13 adopts a diesel generator. When the energy storage SOC is less than 20% and the mains power has not been restored, the central control system 12 triggers the transfer switch 15 to start the diesel generator, so as to avoid system paralysis caused by long-term power outage.
[0016] In addition, the intelligent monitoring module 11 is also electrically connected to the thyristor static switching cabinet 2 and the energy storage battery system 9; the mains power supply line 1 is connected in series with the fourth circuit breaker 16d and the transformer 17 in sequence.
[0017] The intelligent monitoring module 11 includes several sensors, which are used to collect power quality of the mains power supply line 1, operating parameters of the return water pump 5 and the supply water pump 6, and environmental data of the battery cabinet 10, and upload them to the central control system 12. Specifically, the central control system 12 adopts a DCS control system, which has the functions of automatic switching control, load priority scheduling, fault alarm and remote communication.
[0018] The usage process of this utility model is as follows: In emergency situations or when the mains power is abnormal, the intelligent monitoring module 11 detects voltage and frequency deviations and triggers the central control system 12. The thyristor switching switch 3 switches to energy storage power supply within 10ms, and the pump starts in the order of "water supply pump 6 → return pump 5" to avoid load impact. The battery management system 14 monitors the energy storage SOC in real time. When the SOC is ≤20% and the mains power has not been restored, the central control system 12 triggers the transfer switch 15 to start the diesel generator's three-level backup power supply 13 and switches to generator power supply. After the mains power is restored, the central control system 12 first switches back to energy storage power supply to buffer the impact, and then automatically switches back to mains power and controls the energy storage system to recharge and restore the SOC to ≥80%. Throughout the process, the intelligent monitoring module 11 uploads data to the central control system 12, and in case of abnormality, it notifies the operation and maintenance personnel through audible and visual alarms and remote notification.
Claims
1. An emergency power supply system for a circulating water system in a metallurgical furnace, characterized in that, It includes a thyristor static switching cabinet (2) and a first circuit breaker (16a) arranged in parallel, both of which are electrically connected to the mains power supply line (1) through a changeover switch (15); the thyristor static switching cabinet (2) is equipped with a current transformer (18), a second circuit breaker (16b) and a thyristor switching switch (3) arranged in series. The thyristor switching switch (3) is electrically connected to the energy storage power supply line (4), and the energy storage power supply line (4) is electrically connected to the third circuit breaker assembly (16c) and the energy storage battery system (9) respectively. The third circuit breaker assembly (16c) is connected in series with the load module (7). The third circuit breaker assembly (16c) includes a number of circuit breakers arranged in parallel. The load module (7) includes a return water pump (5) and a supply water pump (6). The return water pump (5) and the supply water pump (6) are connected in series with the circuit breakers in the third circuit breaker assembly (16c) respectively. The energy storage battery system (9) includes an energy storage converter (8), a battery cabinet (10), and a battery management system (14) connected in series. The other end of the first circuit breaker (16a) is connected in series with the three-level backup power supply (13), the intelligent monitoring module (11) and the central control system (12); the intelligent monitoring module (11) is also electrically connected to the thyristor static switching cabinet (2) and the energy storage battery system (9).
2. The emergency power supply system for a circulating water system in a metallurgical furnace as described in claim 1, characterized in that, The mains power supply line (1) is also connected in series with the fourth circuit breaker (16d) and the transformer (17).
3. The emergency power supply system for a circulating water system in a metallurgical furnace as described in claim 1, characterized in that, The central control system (12) adopts a DCS control system.
4. An emergency power supply system for a circulating water system in a metallurgical furnace as described in claim 1, characterized in that, The third-level backup power supply (13) is a diesel generator.
5. An emergency power supply system for a circulating water system in a metallurgical furnace as described in claim 1, characterized in that, The intelligent monitoring module (11) includes several sensors, which are used to collect the power quality of the mains power supply line (1), the operating parameters of the return water pump (5) and the delivery water pump (6), the environmental data of the battery cabinet (10), and upload them to the central control system (12).