A heating furnace cooling protection system and application method thereof

Abstract

The present invention discloses a heating furnace cooling protection system and an application method thereof. The system includes a circulating cooling water system and an emergency cooling water system; the emergency cooling water system includes an unexpected signal collection device and a valve; the valve is arranged on the pipelines of the circulating cooling water system and the emergency cooling water system, and the output end of the unexpected signal collection device is connected to the valve. In the system, when an unexpected situation occurs, the circulating cooling water system fails, and the emergency cooling water system can respond instantly and automatically cool the heating furnace. The system realizes emergency cooling in an emergency situation and avoids equipment damage caused by excessive furnace temperature due to cooling water interruption. The system does not need to set up a water tank for water supply and does not need manual intervention, and has the advantages of fast response speed, reliable system, low cost, and high degree of automation. It has certain significance in enhancing the safety of the heating furnace operation area and reducing the management and use costs of the security water system.

Description

Technical Field

[0001] The invention belongs to the field of heating furnace cooling systems and relates to a heating furnace cooling protection system and an application method thereof. Background Art

[0002] In the field of material thermal processing, heating furnaces and their supporting devices are widely used. When the heating furnace is working, a temperature of thousands of degrees will be generated in the furnace. In order to ensure that the water temperature of other parts of the heating furnace except the furnace is not too high, the furnace and the furnace body need to be separated by insulation materials. In addition, the furnace body needs to be continuously cooled during the operation of the heating furnace. The common method is to pass circulating cooling water for cooling. Among them, the circulating cooling water system composed of a water cooler is one of the common cooling methods. However, if there are unexpected situations such as power outages and water cooler failures, the cooling water circulation system cannot work, resulting in an increase in the temperature of the furnace body. In severe cases, the furnace body will deform and crack, and components such as sealing rings and plastic pipes will catch fire and burn, leading to serious accidents. The normal cooling of the heating furnace is closely related to safe production operations. In order to prevent accidents caused by failures in the circulating cooling water system, many factories will reserve an emergency safety water system in their designs to ensure the normal operation of the cooling water system and the normal cooling of the furnace body after a failure in the circulating cooling water system. However, there are many problems in actual use: for example, the security water system and the circulating water system affect each other, the security water system has high construction and maintenance costs, the operation is cumbersome, and the security water system cannot be put into use in time under emergency conditions.

[0003] For example, in the security emergency device of the cooling water system provided by patent CN205843396U, a high-level water tank needs to be set up to store cooling water, which not only increases the cost, but also puts forward requirements for the site space, or the water tank has limited water storage, and there may be a situation where the emergency cooling water is exhausted. For example, in the security emergency device provided by CN101476805B, the circulating cooling water circuit is connected to the security water circuit, and the one-way pressure valve is used to control the on-off in the middle. When the system is working normally, the water pressure of the circulating cooling water pipeline is greater than that of the security water pipeline, the valve is closed, and the cooling of the furnace body is responsible for the circulating water. When an emergency such as power failure, pipeline rupture, water pump stoppage, etc. occurs, the water pressure of the circulating water pipeline is less than that of the security water pipeline, the valve is opened, and the security water is responsible for the emergency cooling of the furnace body. However, the situation that may occur is: when cooling the heating furnace, the water temperature and water pressure of the circulating cooling water are not always in a stable state, which may cause the security water valve (one-way pressure valve) to be not in an ideal state, resulting in the security water not being able to be put into use in a timely and effective manner in an emergency. However, in non-emergency situations, the safety water is used together with the circulating water for cooling, which results in a disorder in the circulating water system. In order to ensure the balance of the circulating water system, the water circuit has to be intervened by manually opening and closing the safety water valve in actual use. This not only increases the cost of manual management, but also makes it difficult to respond to emergencies in a timely manner, resulting in the heating furnace not being cooled immediately and effectively, which may cause irreparable losses such as furnace cracking and fire. Summary of the invention

[0004] In order to overcome the deficiencies in the prior art, an object of the present invention is to provide a heating furnace cooling protection system and an application method thereof.

[0005] The purpose of the present invention is achieved by at least one of the following technical solutions.

[0006] The heating furnace cooling (emergency) protection system and device provided by the present invention can respond in real time according to the working status of the water cooler and its circulating cooling water. If there is a power outage, low water pressure in the water cooler, high water temperature, or a water cooler fault alarm, it can effectively solve the control problem of automatic connection and disconnection between the circulating cooling water and the emergency cooling water, ensure the safety of the heating furnace, and avoid accidents caused by excessive water temperature in the heating furnace.

[0007] The heating furnace cooling protection system provided by the present invention comprises a circulating cooling water system and an emergency cooling water system; the circulating cooling water system comprises a water cooler; the water cooler is connected to the heating furnace through a first pipeline; the emergency cooling water system comprises an unexpected signal collecting device and a valve (water valve); the input end of the unexpected signal collecting device is connected to the water cooler; the output end of the unexpected signal collecting device is connected to the valve (water valve); the heating furnace is connected to a tap water network through a second pipeline, and the heating furnace is also connected to a drainage pool through a fourth pipeline;

[0008] The valves include a circulation pipeline valve, an emergency system water inlet valve and an emergency system drainage valve; the circulation pipeline valve is arranged on the first pipeline; the emergency pipeline valve is arranged on the second pipeline; and the emergency system drainage valve is arranged on the fourth pipeline.

[0009] The heating furnace cooling protection system provided by the present invention is composed of a circulating cooling water system and an emergency cooling water system. The circulating cooling water system pipe network is connected in parallel with the emergency cooling water system pipe network (including a water inlet pipe and a drainage pipe), and the tap water pipe network is divided into two branches, which are respectively connected to the circulating cooling water system pipe network and the emergency cooling water system pipe network. The circulating pipe valve and the emergency pipe valve can receive unexpected signals such as power failure, low water pressure, high water temperature, and water cooler failure of the water cooler control system.

[0010] Furthermore, in addition to the emergency system water inlet valve, the second pipeline is also provided with an emergency pipeline first control valve, and the emergency pipeline first control valve is a manual valve; the emergency pipeline first control valve and the emergency system water inlet valve are connected in series.

[0011] Furthermore, the first pipeline (circulation pipeline) is connected to the tap water network through a third pipeline (water supply pipeline).

[0012] Furthermore, a water supply pipeline valve is provided on the third pipeline. The water supply pipeline valve can be opened to supply water to the water cooler.

[0013] Furthermore, the emergency system water inlet valve includes a second emergency pipeline control valve and a third emergency pipeline control valve; the second emergency pipeline control valve is a manual valve, and the third emergency pipeline control valve is a solenoid valve; the second emergency pipeline control valve and the third emergency pipeline control valve are arranged in parallel on the second pipeline (the water inlet pipeline of the emergency system). When the solenoid valve fails to work normally, the manual valve can be manually opened to connect the second pipeline and work normally.

[0014] Furthermore, the emergency system drainage valve includes a first drainage pipe control valve and a second drainage pipe control valve; the first drainage pipe control valve is a manual valve, and the second drainage pipe control valve is a solenoid valve; the first drainage pipe control valve and the second drainage pipe control valve are arranged in parallel on the fourth pipe (the drainage pipe of the emergency system). When the solenoid valve fails to work normally, the manual valve can be manually opened to connect the fourth pipe and work normally.

[0015] Preferably, the circulation pipeline valve and the emergency pipeline valve are solenoid valves. The circulation pipeline valve is in a normally open state, and the emergency pipeline valve is in a normally closed state. When the water cooler generates an abnormal working state signal, the circulation pipeline valve changes state to a closed state; the emergency pipeline valve changes state to an open state. The solenoid valve in the system is any water solenoid valve that meets the use requirements, and the solenoid valve control circuit is connected to the output end of the accident signal collection device to receive accident signals such as water cooler power failure, high water temperature, low water pressure, and water cooler failure.

[0016] Further preferably, the circulation pipeline valve includes a circulation pipeline first control valve and a circulation pipeline second control valve.

[0017] Furthermore, the unexpected signal collection device collects the working status signal of the water cooler; the working status signal includes a normal working status signal and an abnormal working status signal.

[0018] Furthermore, the abnormal working state signal is one or more of a water cooler power off signal, a water pressure too low signal, a water temperature too high signal, and a water cooler fault signal.

[0019] Furthermore, the output end of the unexpected signal collecting device is connected to an alarm device; when the unexpected signal collecting device collects an abnormal working state signal of the water cooler, the alarm device is turned on.

[0020] The application method of the heating furnace cooling protection system provided by the present invention comprises the following steps:

[0021] (1) When the accidental signal collection device detects that the water cooler is operating normally, the first pipeline is in a connected state, the second pipeline, the third pipeline and the fourth pipeline are in a closed state, and the cooling water circulates between the water cooler and the heating furnace in the first pipeline;

[0022] (2) When the accidental signal collection device collects one or more of the power-off signal, water temperature over-high signal, and water-cooling machine fault signal of the water-cooling machine, the first pipeline and the third pipeline are in a closed state, the second pipeline and the fourth pipeline are in a connected state, and the cooling water flows from the tap water network to the heating furnace, and then is discharged from the fourth pipeline, so that the emergency cooling water system cools the heating furnace; the alarm device is turned on;

[0023] (3) When the accidental signal collection device collects the low water pressure signal of the water cooler, the first pipe and the third pipe are in a closed state, the second pipe and the fourth pipe are in a connected state, the cooling water flows from the tap water network to the heating furnace, and then is discharged from the fourth pipe, and the alarm device is turned on; then, the third pipe is in a connected state, and the tap water flows from the third pipe to the first pipe. After the water pressure of the water cooler returns to normal, the first pipe is reconnected, the second pipe, the third pipe and the fourth pipe are closed again, and the system returns to normal working state.

[0024] The application method provided by the present invention. First, the water cooler conducts a real-time self-check to see if it is in a normal state and if there is an accident alarm, and feeds back the electrical signal to each valve; when the water cooler is working normally, the water cooler pumps circulating cooling water into the cooling water channel of the heating furnace to cool the heating furnace. If a power outage or an unexpected situation such as the water level of the water cooler is too low, the temperature is too high, or the water cooler fails occurs, the corresponding normally open valve (circulation system valve) is closed and the normally closed valve (emergency system water inlet valve and emergency system drain valve) is opened, and tap water quickly enters the cooling water channel of the heating furnace through the emergency cooling water system pipeline, taking over the circulating cooling water to continuously cool the heating furnace;

[0025] Preferably, in the heating furnace cooling protection system provided by the present invention, a main valve is also provided on the second pipeline. When the water cooler needs to be powered off for inspection or the system pipeline needs to be maintained, the main valve can be manually closed to prevent tap water from flowing into the system pipeline network.

[0026] The solution adopted by the present invention to solve the technical problem is: to provide a heating furnace cooling (emergency) protection system, including a circulating cooling water system and an emergency cooling water system and a control valve connection device thereof. The tap water inlet pipe is divided into two branches, which are respectively connected to the circulating cooling water system pipe network and the emergency cooling water system pipe network. The circulating cooling water system pipe network is connected in parallel with the emergency cooling water system pipe network. The emergency cooling water is discharged into the municipal sewer or drainage pool at the end of the emergency cooling water system pipe network.

[0027] Preferably, the heating furnace in the system includes a heating furnace hearth, a cooling water channel, a heating system, a control system, etc. The water cooler includes a water cooler body, a cooling system, a fan, a water pump, an internal circulation water channel, a control system, etc.

[0028] The tap water in the system should comply with the provisions of the national standard "Code for Design of Building Water Supply and Drainage" (GB 50015-2003) on tap water supply pressure.

[0029] The heating furnace cooling (emergency) protection system provided by the present invention does not require the installation of a high-level water tank for water storage, is not affected by the water pressure of the water circuit during system operation, and does not require manual operation under normal conditions. It is an economical, efficient and feasible heating furnace cooling (emergency) protection system solution.

[0030] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0031] The heating furnace cooling protection system provided by the present invention has the advantages of simple structure, high degree of automation, good cooling effect, low cost of transformation and use, etc.; moreover, the heating furnace cooling protection system is stable and has rapid emergency response; in non-emergency state, the circulating cooling water system and the emergency cooling water system do not interfere with each other and operate stably; in emergency state, the emergency cooling water can be cut in through the solenoid valve to continuously cool the heating furnace in a timely and effective manner, thereby buying more time for power outages or equipment repairs. In summary, the heating furnace cooling protection system provided by the present invention can ensure the safe use of the heating furnace, and is a heating furnace cooling (emergency) system with practical application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic diagram of the structure of a heating furnace cooling protection system provided in an embodiment;

[0033] Figure 2 A schematic diagram of the heating furnace cooling protection system provided by the embodiment when the water cooler is working normally;

[0034] Figure 3 A schematic diagram of a heating furnace cooling protection system provided in an embodiment when a water cooler operates abnormally.

[0035] Among them, the main valve 1, the first control valve of the emergency pipeline 2, the water supply pipeline valve 3, the second control valve of the emergency pipeline 4-1, the third control valve of the emergency pipeline 4-2, the first control valve of the drainage pipeline 5-1, the second control valve of the drainage pipeline 5-2, the first control valve of the circulation pipeline 6-1, the second control valve of the circulation pipeline 6-2, the water cooler 7, and the heating furnace 8. DETAILED DESCRIPTION

[0036] The specific implementation of the present invention is further described below in conjunction with examples, but the implementation and protection of the present invention are not limited thereto. It should be noted that if there are processes that are not particularly described in detail below, they can be implemented or understood by those skilled in the art with reference to the prior art. If the manufacturer of the reagents or instruments used is not indicated, they are deemed to be conventional products that can be purchased commercially.

[0037] Example 1

[0038] Reference Figure 1As shown, the heating furnace cooling protection system provided by the embodiment includes a circulating cooling water system and an emergency cooling water system; the circulating cooling water system includes a water cooler 7; the water cooler 7 is connected to the heating furnace 8 through a first pipeline (circulating pipeline); the cooling water circulates between the water cooler 7 and the heating furnace 8 through the first pipeline. The emergency cooling water system includes an unexpected signal collection device and an emergency valve; the input end of the unexpected signal collection device is connected to the water cooler 7; the output end of the unexpected signal collection device is connected to the emergency valve; the heating furnace 8 is connected to the tap water network through a second pipeline (the water inlet pipeline of the emergency cooling water system network), and the heating furnace 8 is also connected to the drainage pool through a fourth pipeline (the drainage pipeline of the emergency cooling water system network); the emergency valve includes a circulating pipeline valve, an emergency system water inlet valve and an emergency system drainage valve; the circulating pipeline valve is arranged on the first pipeline (circulating pipeline); the emergency system water inlet valve is arranged on the second pipeline, and the emergency system drainage valve is arranged on the fourth pipeline.

[0039] The circulating pipeline valve includes a first circulating pipeline control valve 6-1 and a second circulating pipeline control valve 6-2; the first circulating pipeline control valve 6-1 and the second circulating pipeline control valve 6-2 are both solenoid valves; the emergency system water inlet valve includes a second emergency pipeline control valve 4-1 and a third emergency pipeline control valve 4-2; the second emergency pipeline control valve 4-1 and the third emergency pipeline control valve 4-2 are arranged in parallel on the second pipeline; the second emergency pipeline control valve 4-1 is a manual valve, and the third emergency pipeline control valve 4-2 is a solenoid valve; when the third emergency pipeline control valve 4-2 fails to work normally, the second emergency pipeline control valve 4-1 can be manually opened to connect the second pipeline to ensure that the second pipeline (the water inlet pipeline of the emergency cooling water system network) can still work normally.

[0040] The second pipeline is also provided with an emergency pipeline first control valve 2. The emergency pipeline first control valve 2 is a manual valve. When the water cooler needs to be powered off for maintenance or the system pipeline needs to be maintained, it can be manually closed to prevent tap water from pouring into the second pipeline.

[0041] The first pipeline is connected to the water supply network through a third pipeline. The third pipeline is provided with a water supply pipeline valve 3. When the unexpected signal collection device detects that the water pressure of the first pipeline (circulation pipeline) is insufficient, the water supply pipeline valve 3 can be opened to connect the third pipeline (the water supply pipeline of the circulation system) to realize water supply to the circulation pipeline.

[0042] The heating furnace is provided with a fourth pipeline (drainage pipeline of the emergency system) to connect to the outside. A drainage pipeline valve (drainage valve of the emergency system) is provided on the fourth pipeline. The drainage pipeline valve includes a first drainage pipeline control valve 5-1 and a second drainage pipeline control valve 5-2.

[0043] The first control valve 5-1 of the drainage pipe and the second control valve 5-2 of the drainage pipe are arranged in parallel on the fourth pipe (drainage pipe). Among them, the first control valve 5-1 of the drainage pipe is a manual valve, and the second control valve 5-2 of the drainage pipe is a solenoid valve. When the second control valve 5-2 of the drainage pipe cannot work normally, the first control valve 5-1 of the drainage pipe can also be manually opened to connect the fourth pipe (drainage pipe) to ensure the normal operation of the drainage pipe of the emergency cooling water system network. The drainage pipe is connected to the drainage pool, and the drainage pool is connected to the municipal sewer.

[0044] The water inlet pipe of the tap water network is divided into two branches, which are respectively connected to the circulating cooling water system network (including the first pipeline) and the emergency cooling water system network (including the second pipeline and the fourth pipeline). A main valve 1 is also provided on the water inlet pipe of the tap water network. The main valve 1 is a manual valve. The circulating cooling water system network (including the first pipeline) and the emergency cooling water system network (including the second pipeline and the fourth pipeline) do not interfere with each other but complement each other, and jointly ensure the realization of the function of the cooling water protection system.

[0045] The unexpected signal collection device collects the working state signal of the water cooler 7; the working state signal includes a normal working state signal and an abnormal working state signal.

[0046] The abnormal working state signal is one or more of a water cooler power off signal, a water pressure too low signal, a water temperature too high signal, and a water cooler fault signal.

[0047] The input end of the water cooler accident signal collection device is connected to the water cooler. The water cooler accident signal collection device collects power-off signals, low water pressure signals, high water temperature signals and water cooler fault signals of the water cooler.

[0048] The output end of the water cooler accident signal collection device is connected to the emergency pipeline third control valve 4-2, the drainage pipeline second control valve 5-2, the circulation pipeline first control valve 6-1, and the circulation pipeline second control valve 6-2. The output end of the accident signal collection device is also connected to the alarm device; when the signal collection device collects the abnormal working state signal of the water cooler, the alarm device is turned on.

[0049] Example 2

[0050] An application method of a heating furnace cooling protection system comprises the following steps:

[0051] When the accident signal collection device detects that the water cooler is working normally, the main valve 1, the first control valve 2 of the emergency pipeline, the first control valve 6-1 of the circulation pipeline, and the second control valve 6-2 of the circulation pipeline are all in the open state; the remaining control valves are all in the closed state, so that the first pipeline is in the connected state, and the second pipeline, the third pipeline and the fourth pipeline are in the closed state, and the cooling water circulates between the water cooler and the heating furnace in the first pipeline (refer to Figure 2 As shown), the heating furnace can be cooled down normally.

[0052] Example 3

[0053] Reference Figure 3 As shown, when the unexpected signal collection device collects the power-off signal of the water chiller, the signal is transmitted to the third control valve 4-2 of the emergency pipeline, the second control valve 5-2 of the drainage pipeline, the first control valve 6-1 of the circulation pipeline, and the second control valve 6-2 of the circulation pipeline; the first control valve 6-1 of the circulation pipeline and the second control valve 6-2 of the circulation pipeline are changed from the open state to the closed state; the third control valve 4-2 of the emergency pipeline and the second control valve 5-2 of the drainage pipeline are changed from the closed state to the open state;

[0054] At this time, except for the main valve 1, the first control valve 2 of the emergency pipeline, the third control valve 4-2 of the emergency pipeline, and the second control valve 5-2 of the drainage pipeline, all other valves are in the closed state; at this time, since the first control valve 6-1 of the circulation pipeline and the second control valve 6-2 of the circulation pipeline are in the closed state, the first pipeline (circulation pipeline) is in the closed state.

[0055] At this time, since the third control valve 4-2 of the emergency pipeline is switched from the closed state to the open state, the second pipeline (the water inlet pipeline of the emergency cooling water system network) is also switched from the closed state to the connected state accordingly;

[0056] At this time, since the second control valve 5-2 of the drainage pipeline changes from the closed state to the open state, the fourth pipeline (the drainage pipeline of the emergency cooling water system network) also changes from the closed state to the connected state; while the third pipeline (the water supply pipeline of the circulation system) is still in the closed state;

[0057] The cooling water flows from the tap water network through the second pipe (the water inlet pipe of the emergency cooling water system network) and enters the cooling water channel of the heating furnace to cool the heating furnace, and then is discharged from the fourth pipe (the drainage pipe of the emergency system) to the drainage pool; at the same time, the alarm is turned on to convey the information of the power failure of the water cooler to the staff so that the staff can check the fault as soon as possible; when the fault is eliminated, the solenoid valve will automatically return to its position and the system will return to normal working state without manual operation.

[0058] When the third control valve 4-2 of the emergency pipeline and the second control valve 5-2 of the drainage pipeline cannot be automatically converted from the closed state to the open state due to a malfunction, the staff can also manually open the second control valve 4-1 of the emergency pipeline and the first control valve 5-1 of the drainage pipeline, so that the second pipeline (the water inlet pipeline of the emergency cooling water system network) is converted from the closed state to the connected state, and the fourth pipeline (the drainage pipeline of the emergency system) is also converted from the closed state to the connected state, so as to realize the cooling of the heating furnace.

[0059] Example 4

[0060] Reference Figure 3 As shown, when the unexpected signal collection device collects one or more of the water temperature over-high signal of the water chiller and the water chiller fault signal, the signal collection device transmits the signal to the emergency pipeline third control valve 4-2, the drainage pipeline second control valve 5-2, the circulation pipeline first control valve 6-1, and the circulation pipeline second control valve 6-2; the circulation pipeline first control valve 6-1 and the circulation pipeline second control valve 6-2 are changed from the open state to the closed state; the emergency pipeline third control valve 4-2 and the drainage pipeline second control valve 5-2 are changed from the closed state to the open state;

[0061] At this time, except for the main valve 1, the first control valve 2 of the emergency pipeline, the third control valve 4-2 of the emergency pipeline, and the second control valve 5-2 of the drainage pipeline, all other valves are in a closed state; at this time, since the first control valve 6-1 of the circulation pipeline and the second control valve 6-2 of the circulation pipeline are in a closed state, the first pipeline (circulation pipeline) is in a closed state;

[0062] At this time, since the third control valve 4-2 of the emergency pipeline is switched from the closed state to the open state, the second pipeline (the water inlet pipeline of the emergency cooling water system network) is also switched from the closed state to the connected state accordingly;

[0063] At this time, since the second control valve 5-2 of the drainage pipeline changes from the closed state to the open state, the fourth pipeline (the drainage pipeline of the emergency cooling water system network) also changes from the closed state to the connected state accordingly;

[0064] The third pipeline (the water supply pipeline of the circulation system) is still closed;

[0065] The cooling water flows from the tap water network through the second pipe (the water inlet pipe of the emergency cooling water system network) to the heating furnace, cooling the heating furnace, and then is discharged from the fourth pipe (the drainage pipe of the emergency system) into the drainage pool; at the same time, the alarm is turned on to convey the information of the water temperature of the water cooler being too high and the water cooler being faulty to the staff, so that the staff can troubleshoot the fault as soon as possible; when the fault is eliminated, the solenoid valve will automatically return to its position and the system will return to normal working state without manual operation.

[0066] When the third control valve 4-2 of the emergency pipeline and the second control valve 5-2 of the drainage pipeline cannot be automatically converted from the closed state to the open state due to a malfunction, the staff can also manually open the second control valve 4-1 of the emergency pipeline and the first control valve 5-1 of the drainage pipeline, so that the second pipeline (the water inlet pipeline of the emergency cooling water system network) is converted from the closed state to the connected state, and the fourth pipeline (the drainage pipeline of the emergency system) is also converted from the closed state to the connected state, so as to realize the cooling of the heating furnace.

[0067] Example 5

[0068] When the unexpected signal collection device collects the low water pressure signal of the water chiller, the signal is transmitted to the third control valve 4-2 of the emergency pipeline, the second control valve 5-2 of the drainage pipeline, the first control valve 6-1 of the circulation pipeline, and the second control valve 6-2 of the circulation pipeline; the first control valve 6-1 of the circulation pipeline and the second control valve 6-2 of the circulation pipeline are changed from the open state to the closed state; the third control valve 4-2 of the emergency pipeline and the second control valve 5-2 of the drainage pipeline are changed from the closed state to the open state;

[0069] At this time, except for the main valve 1, the first control valve 2 of the emergency pipeline, the third control valve 4-2 of the emergency pipeline, and the second control valve 5-2 of the drainage pipeline, all other valves are in the closed state; at this time, since the first control valve 6-1 of the circulation pipeline and the second control valve 6-2 of the circulation pipeline are in the closed state, the first pipeline (circulation pipeline) is in the closed state.

[0070] At this time, since the third control valve 4-2 of the emergency pipeline is switched from the closed state to the open state, the second pipeline (the water inlet pipeline of the emergency cooling water system network) is also switched from the closed state to the connected state accordingly;

[0071] At this time, since the second control valve 5-2 of the drainage pipeline changes from the closed state to the open state, the fourth pipeline (the drainage pipeline of the emergency cooling water system network) also changes from the closed state to the connected state; while the third pipeline (the water supply pipeline of the circulation system) is still in the closed state;

[0072] The cooling water flows from the tap water network through the second pipe (the water inlet pipe of the emergency cooling water system network) and enters the cooling water channel of the heating furnace to cool the heating furnace, and then is discharged from the fourth pipe (the drainage pipe of the emergency system) to the drainage pool; at the same time, the alarm is turned on to convey the low water pressure information of the water cooler to the staff, so that the staff can troubleshoot the fault as soon as possible and manually open the water supply pipe valve 3 to connect the first pipe with the third pipe to achieve water replenishment to solve the problem of low water pressure in the water cooler. When the low water pressure signal of the water cooler disappears, the solenoid valve will automatically return to its position, the system will resume normal working state, the first pipe will be reconnected, the second pipe and the fourth pipe will be closed again, and the staff can manually close the water supply pipe valve 3 to close the third pipe.

[0073] When the staff finds that the water level of the water cooler is low during routine inspection, they can also manually open the water replenishment valve 3 to connect the first pipe with the third pipe to achieve water replenishment so that the water level of the water cooler reaches a normal state;

[0074] In addition, the water supply pipe valve 3 (manual valve) on the third pipe can also be replaced by a solenoid valve and connected to the accidental signal collection device. When the accidental signal collection device collects the low water pressure signal of the water chiller, the accidental signal collection device outputs the signal to the water supply pipe valve 3, and the water supply pipe valve 3 changes from a closed state to an open state, so that the third pipe is in a connected state, and tap water flows from the pipe network through the third pipe to the first pipe to achieve water supply, so as to solve the problem of low water pressure of the water chiller. At the same time, the accidental signal collection device also transmits the low water pressure signal of the water chiller to the emergency pipe third control valve 4-2, the drainage pipe second control valve 5-2, the circulation pipe first control valve 6-1, and the circulation pipe second control valve 6-2; the circulation pipe first control valve 6-1 and the circulation pipe second control valve 6-2 are closed, and the emergency pipe third control valve 4-2 and the drainage pipe second control valve 5-2 are opened, so that the first pipe is closed, and the second pipe and the fourth pipe are opened, so that the emergency cooling water system works. After the water replenishment is completed, when the low water pressure signal of the water chiller disappears, the water replenishment pipeline valve 3, the emergency pipeline third control valve 4-2 and the drainage pipeline second control valve 5-2 are closed again, and the circulation pipeline first control valve 6-1 and the circulation pipeline second control valve 6-2 are reopened, and the system returns to normal working state;

[0075] In addition, the third pipeline can be eliminated and replaced with manual water replenishment. When the water pressure of the water cooler is too low, the emergency cooling water system responds and replaces the circulating cooling water system to cool the heating furnace. At the same time, the low water pressure signal of the water cooler is transmitted to the staff through the alarm, and the staff replenishes the water cooler manually. After the water replenishment is completed, the water pressure of the water cooler returns to normal and the system returns to normal.

[0076] When the heating furnace or water cooler needs to be powered off for maintenance, the main valve 1 and the first control valve 2 of the emergency pipeline can be manually closed to prevent cooling water from flowing into the heating furnace cooling water channel through the emergency cooling water system network for ineffective cooling.

[0077] To sum up, the heating furnace cooling protection system provided by the embodiment of the present invention has the advantages of simple structure, high degree of automation, good cooling effect, low transformation and use costs, etc.; moreover, the heating furnace cooling protection system is stable and has rapid emergency response; in non-emergency conditions, the circulating cooling water system and the emergency cooling water system do not interfere with each other and operate stably; in an emergency condition, the emergency cooling water can be cut in through the solenoid valve, so as to continuously cool the heating furnace in a timely and effective manner, thereby buying more time for power outages or equipment repairs.

[0078] The above embodiments are only preferred implementation modes of the present invention and are only used to explain the present invention rather than to limit the present invention. Any changes, substitutions, modifications, etc. made by those skilled in the art without departing from the spirit of the present invention should fall within the scope of protection of the present invention.

Claims

1. A heating furnace cooling protection system, characterized in that: It includes a circulating cooling water system and an emergency cooling water system; the circulating cooling water system includes a water cooler; the water cooler is connected to the heating furnace through a first pipeline; the emergency cooling water system includes an unexpected signal collecting device and a valve; the input end of the unexpected signal collecting device is connected to the water cooler; the output end of the unexpected signal collecting device is connected to the valve; the heating furnace is connected to the tap water network through a second pipeline, and the heating furnace is also connected to the drainage pool through a fourth pipeline; the valve includes a circulating pipeline valve, an emergency system water inlet valve and an emergency system drainage valve; the circulating pipeline valve is arranged on the first pipeline; the emergency system water inlet valve is arranged on the second pipeline; the emergency system drainage valve is arranged on the fourth pipeline; in addition to the emergency system water inlet valve, the second pipeline is also provided with an emergency pipeline first control valve, and the emergency pipeline first control valve is a manual valve; the emergency pipeline first control valve is connected to the emergency The system water inlet valve is in series state; the first pipeline is connected to the tap water network through the third pipeline; the third pipeline is provided with a water supply pipeline valve; the emergency system water inlet valve includes the emergency pipeline second control valve and the emergency pipeline third control valve; the emergency pipeline second control valve is a manual valve, and the emergency pipeline third control valve is a solenoid valve; the emergency pipeline second control valve and the emergency pipeline third control valve are arranged in parallel on the second pipeline; the emergency system drain valve includes the drain pipeline first control valve and the drain pipeline second control valve; the drain pipeline first control valve is a manual valve, and the drain pipeline second control valve is a solenoid valve; the drain pipeline first control valve and the drain pipeline second control valve are arranged in parallel on the fourth pipeline; the accident signal collection device collects the working state signal of the water cooler; the working state signal includes the normal working state signal and the abnormal working state signal; When the unexpected signal collection device detects that the water cooler is operating normally, the first pipeline is in a connected state, the second pipeline, the third pipeline and the fourth pipeline are in a closed state, and the cooling water circulates between the water cooler and the heating furnace in the first pipeline; When the accidental signal collection device collects one or more of the power-off signal, water temperature over-high signal, and fault signal of the water chiller, the first pipeline and the third pipeline are in a closed state, the second pipeline and the fourth pipeline are in a connected state, and the cooling water flows from the tap water network to the heating furnace, and then is discharged from the fourth pipeline, so that the emergency cooling water system cools the heating furnace; the alarm device is turned on; When the unexpected signal collection device collects the low water pressure signal of the water cooler, the first pipe and the third pipe are in a closed state, the second pipe and the fourth pipe are in a connected state, the cooling water flows from the tap water network to the heating furnace, and then is discharged from the fourth pipe, and the alarm device is turned on; then, the third pipe is in a connected state, and the tap water flows from the third pipe to the first pipe. After the water pressure of the water cooler returns to normal, the first pipe is reconnected, the second pipe, the third pipe and the fourth pipe are closed again, and the system returns to normal working state.

2. The heating furnace cooling protection system according to claim 1, characterized in that: The abnormal working state signal is one or more of a water cooler power off signal, a water pressure too low signal, a water temperature too high signal, and a water cooler fault signal.

3. The heating furnace cooling protection system according to claim 1, characterized in that: The output end of the unexpected signal collecting device is connected to the alarm device; when the unexpected signal collecting device collects the abnormal working state signal of the water cooler, the alarm device is turned on.

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