Communication water supply method for two blast furnaces

Abstract

According to the communicated water supply method for the two blast furnaces, blast furnace water stations, insertion type flowmeters and water supply and return pipelines are included, the blast furnace water stations comprise the first blast furnace water station and the second blast furnace water station, and the first blast furnace water station and the second blast furnace water station are connected through the water supply and return pipelines; the first blast furnace water station and the second blast furnace water station are respectively connected with a first water supply pump station and a second water supply pump station, the first water supply pump station and the second water supply pump station are provided with a blast furnace water station comprehensive pump set, and the plug-in flow meter is connected with a water supply and return pipeline; the two blast furnaces independently supply water during normal operation, mutual influence is avoided, and maintenance of related equipment can be arranged during damping down of the blast furnaces; by means of the mode that the two blast furnaces are communicated for water supply, the comprehensive pump sets of the two blast furnace water stations can be standby for each other, the risk resisting capacity of the system in the supply protection aspect is improved, and the water supply safety and reliability of the system are further improved; and the operation requirements that two water stations do not overflow and a pipe network does not build pressure can be met.

Description

Technical Field

[0001] The present invention relates to the technical field of metallurgy, and particularly to a method for connecting and supplying water to two blast furnaces. Background Art

[0002] The blast furnace is the core equipment for steel production, and its stable operation is crucial for the entire production process. As one of the important support systems for the blast furnace, the reliability and safety of the existing water supply system cannot be guaranteed. When two blast furnace water stations supply water to relevant users independently, if there is an abnormality in the power distribution system of a certain section of the pump group in the water station or a certain water pump fails, there is no standby pump or only one pump is running and the flow rate cannot meet the user's needs, which directly threatens the normal operation of the blast furnace; the water demand of the auxiliary equipment of the blast furnace will force the blast furnace to stop blowing, resulting in production losses. Summary of the Invention

[0003] In order to overcome the above-mentioned disadvantages of the prior art, the purpose of the present invention is to provide a method for connecting and supplying water to two blast furnaces.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a method for connecting and supplying water to two blast furnaces, including a blast furnace water station, an insertion flowmeter and a supply and return water pipeline. The blast furnace water station includes a first blast furnace water station and a second blast furnace water station. The first blast furnace water station and the second blast furnace water station are connected through the supply and return water pipeline. The first blast furnace water station and the second blast furnace water station are respectively connected to a first water supply pumping station and a second water supply pumping station. The first water supply pumping station and the second water supply pumping station are provided with a comprehensive pump group for the blast furnace water station. The insertion flowmeter is connected to the supply and return water pipeline. The blast furnace water station is provided with users of the comprehensive pump group for the blast furnace water station and a cooling tower for the blast furnace water station.

[0005] As a further improvement of the present invention: the comprehensive pump group for the blast furnace water station includes a first comprehensive pump group for the blast furnace water station and a second comprehensive pump group for the blast furnace water station. The first water supply pumping station is provided with the first comprehensive pump group for the blast furnace water station, and the second water supply pumping station is provided with the second comprehensive pump group for the blast furnace water station.

[0006] As a further improvement of the present invention: the first comprehensive pump group for the blast furnace water station and the second comprehensive pump group for the blast furnace water station are respectively placed in different low-voltage power supply sections and continuously supply water outward.

[0007] As a further improvement of the present invention: the first water supply pumping station supplies cooling water for the blast furnace gas pressure energy recovery turbine generator set and the gas holder booster. The users of the comprehensive pump group for the blast furnace water station include users of the first comprehensive pump group for the blast furnace water station and users of the second comprehensive pump group for the blast furnace water station.

[0008] As a further improvement of the present invention: The first blast furnace water station and the second blast furnace water station respectively supply cooling water for the above-tank and below-tank hydraulic stations of two blast furnaces. The blast furnace water station cooling towers include the first blast furnace water station cooling tower and the second blast furnace water station cooling tower. The first blast furnace water station cooling tower is provided with a first cooling tower water inlet valve, and the second blast furnace water station cooling tower is provided with a second cooling tower water inlet valve.

[0009] As a further improvement of the present invention: The return water pipeline is provided with butterfly valves. The feed and return water pipeline includes a first feed connection pipe, a second feed connection pipe, a first return water connection pipe and a second return water connection pipe. The butterfly valves include a first electric valve, a second electric valve, a third electric valve and a fourth electric valve.

[0010] As a further improvement of the present invention: The first electric valve is connected to the first feed connection pipe, the first feed connection pipe is connected to the feed water pipeline of the first blast furnace water station, the second electric valve is connected to the second feed connection pipe, and the second feed connection pipe is connected to the feed water pipeline of the second blast furnace water station.

[0011] As a further improvement of the present invention: The third electric valve is connected to the first return water connection pipe, the first return water connection pipe is connected to the return water pipeline of the first blast furnace water station, the fourth electric valve is connected to the second return water connection pipe, and the second return water connection pipe is connected to the return water pipeline of the second blast furnace water station.

[0012] As a further improvement of the present invention: When there are faults in the two-section power distribution system or water pumps of the second blast furnace water station, the second blast furnace water station can use the first blast furnace water station comprehensive pump group of the first blast furnace water station for water supply to meet the water demand for blast furnace production. At the same time, when there is a fault in a certain section of power distribution or water pump of the first blast furnace water station, the comprehensive pump group of the second blast furnace water station can be used as a standby pump for the comprehensive pump group of the first blast furnace water station.

[0013] As a further improvement of the present invention: Regarding the balance problem of the connected water supply between the first blast furnace water station and the second blast furnace water station, insertion flow meters are added to the cooling tower water inlet pipelines of the two blast furnace water stations. The insertion flow meters include a first insertion flow meter and a second insertion flow meter. Keep the upper tower valve of one water station fully open, and use the upper tower valve of the other water station to adjust the water volume returning to the water tank of each water station to ensure the liquid level balance of the two blast furnace water stations during the connected water supply period.

[0014] As a further improvement of the present invention: a water supply pump group is composed of two or more centrifugal clean water pumps. The flow rate and head of the pumps are determined by selection calculation according to the total water consumption and water supply pressure requirements of the two blast furnaces. The pump group is connected in parallel to ensure that when one pump fails or is under maintenance, the remaining pumps can still maintain the normal operation of the system. Each pump is equipped with an independent motor and a variable frequency speed regulation device, which can automatically adjust the pump speed according to the actual water consumption to achieve energy-saving operation. A pressure sensor and a flow sensor are installed on the outlet pipeline of the pump to monitor the operation parameters of the pump in real time and transmit the data to the control system.

[0015] As a further improvement of the present invention: two main pipelines are led out from the outlet of the water supply pump group and lead to the two blast furnaces respectively. The main pipelines are made of seamless steel pipes, and the pipe diameter is determined according to the maximum water consumption of the blast furnaces to ensure sufficient water passing section and flow velocity. The inside of the pipeline is subjected to anti-corrosion treatment, such as coating with epoxy coal tar pitch coating, to prevent the inner wall of the pipeline from rusting and corroding and extend the service life of the pipeline. Supports are arranged at certain intervals on the main pipelines to support the weight of the pipelines and reduce pipeline vibration.

[0016] As a further improvement of the present invention: a connecting branch pipe is arranged between the two main pipelines, and an electric control valve and a manual stop valve are installed on the connecting branch pipe. The electric control valve is used to accurately adjust the water volume distribution ratio between the two blast furnaces according to the instructions of the control system to achieve water supply on demand. The manual stop valve is closed during system maintenance or in case of emergency to isolate the water supply systems of the two blast furnaces and prevent the expansion of accidents. The connecting branch pipe is also made of seamless steel pipe and is well insulated to avoid the water in the pipeline affecting the water temperature stability due to heat dissipation.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] In the present invention, the two blast furnaces are independently supplied with water during normal operation to avoid mutual influence, and relevant equipment maintenance can be arranged during the blast furnace shutdown. Through the way of connecting the two blast furnaces for water supply, the comprehensive pump groups of the two blast furnace water stations can be used as backups for each other, improving the risk resistance ability of the system in terms of ensuring water supply and further enhancing the water supply safety and reliability of the system. The design adopts the method of fully opening the valves of one water tower and using the valves of the other water station for regulation, which can meet the operation requirements of no overflow of the two water stations and no pressure buildup in the pipe network. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention.

[0020] In the figure: 1. The integrated pump unit of the first blast furnace water station; 2. The integrated pump unit of the second blast furnace water station; 3. The user of the integrated pump unit of the first blast furnace water station; 4. The user of the integrated pump unit of the second blast furnace water station; 5. The cooling tower of the first blast furnace water station; 6. The cooling tower of the second blast furnace water station; 7. The first cooling tower inlet valve; 8. The second cooling tower inlet valve; 9. The first water supply connecting pipe; 10. The second water supply connecting pipe; 11. The first return water connecting pipe; 12. The second return water connecting pipe; 13. The first electric valve; 14. The second electric valve; 15. The third electric valve; 16. The fourth electric valve; 17. The water supply pipeline of the first blast furnace water station; 18. The water supply pipeline of the second blast furnace water station; 19. The return water pipeline of the first blast furnace water station; 20. The return water pipeline of the second blast furnace water station; 21. The first insertion type flowmeter; 22. The second insertion type flowmeter. Detailed implementation manners

[0021] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] It should be noted that the terms "including" and "having" in the description and claims of the present invention and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units does not necessarily limit to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0023] In the description of the present application, it should be noted that, unless otherwise clearly defined and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0024] Now, the present invention will be further described in conjunction with the accompanying drawings and embodiments: As Figure 1A method for connecting and supplying water to two blast furnaces is shown, including a blast furnace water station, an insertion flowmeter, and a supply and return water pipeline. The blast furnace water station includes a first blast furnace water station and a second blast furnace water station. The first blast furnace water station and the second blast furnace water station are connected by the supply and return water pipeline. The first blast furnace water station and the second blast furnace water station are respectively connected to a first water supply pump station and a second water supply pump station. The first water supply pump station and the second water supply pump station are equipped with a comprehensive pump group for the blast furnace water station. The insertion flowmeter is connected to the supply and return water pipeline. The blast furnace water station is equipped with users of the comprehensive pump group for the blast furnace water station and a cooling tower for the blast furnace water station.

[0025] As a preferred embodiment, the comprehensive pump group for the blast furnace water station includes a first comprehensive pump group 1 for the blast furnace water station and a second comprehensive pump group 2 for the blast furnace water station. The first water supply pump station is equipped with the first comprehensive pump group 1 for the blast furnace water station, and the second water supply pump station is equipped with the second comprehensive pump group 2 for the blast furnace water station.

[0026] As a preferred embodiment, the first comprehensive pump group 1 for the blast furnace water station and the second comprehensive pump group 2 for the blast furnace water station are respectively placed in different low-voltage power supply sections and continuously supply water outward.

[0027] As a preferred embodiment, the first water supply pump station supplies cooling water for the blast furnace gas pressure recovery turbine power generation device and the gas holder booster. The users of the comprehensive pump group for the blast furnace water station include a first user 3 of the comprehensive pump group for the blast furnace water station and a second user 4 of the comprehensive pump group for the blast furnace water station.

[0028] As a preferred embodiment, the first blast furnace water station and the second blast furnace water station respectively supply cooling water for the hydraulic stations above and below the troughs of the two blast furnaces. The cooling tower for the blast furnace water station includes a first cooling tower 5 for the blast furnace water station and a second cooling tower 6 for the blast furnace water station. The first cooling tower 5 for the blast furnace water station is equipped with a first cooling tower inlet valve 7, and the second cooling tower 6 for the blast furnace water station is equipped with a second cooling tower inlet valve 8.

[0029] As a preferred embodiment, the return water pipeline is equipped with butterfly valves. The supply and return water pipeline includes a first water supply connection pipe 9, a second water supply connection pipe 10, a first return water connection pipe 11, and a second return water connection pipe 12. The butterfly valves include a first electric valve 13, a second electric valve 14, a third electric valve 15, and a fourth electric valve 16.

[0030] As a preferred embodiment, the first electric valve 13 is connected to the first water supply connection pipe 9, the first water supply connection pipe 9 is connected to the water supply pipeline 17 of the first blast furnace water station, the second electric valve 14 is connected to the second water supply connection pipe 10, and the second water supply connection pipe 10 is connected to the water supply pipeline 18 of the second blast furnace water station.

[0031] As a preferred embodiment, the third electric valve 15 is connected to the first return water connecting pipe 11, the first return water connecting pipe 11 is connected to the first blast furnace water station return water pipe 19, the fourth electric valve 16 is connected to the second return water connecting pipe 12, and the second return water connecting pipe 12 is connected to the second blast furnace water station return water pipe 20.

[0032] As a preferred embodiment, when the two-section power distribution system or water pump of the second blast furnace water station fails, the second blast furnace water station can use the first blast furnace water station integrated pump group of the first blast furnace water station to supply water to meet the water demand of blast furnace production. At the same time, when a section of the power distribution or water pump of the first blast furnace water station fails, the second blast furnace water station integrated pump group 2 can serve as a backup pump for the first blast furnace water station integrated pump group.

[0033] As a preferred implementation, the balance problem of the water supply of the first blast furnace water station and the second blast furnace water station is solved by adding an insertion flow meter to the cooling tower water inlet pipes of the two blast furnace water stations. The insertion flow meter includes a first insertion flow meter 21 and a second insertion flow meter 22. The tower valve of one water station is kept fully open, and the tower valve of the other water station is used to adjust the amount of water returned to the water tank of each water station to ensure the liquid level balance of the two blast furnace water stations during the connected water supply.

[0034] As a preferred embodiment, a cooling water inlet device is provided at the bottom of the furnace body of each blast furnace, including a water inlet distributor and a nozzle. The water inlet distributor evenly distributes the water from the main pipeline to each blast furnace cooling part, such as the furnace shell, furnace bottom, etc. The nozzle adopts a multi-hole spray structure, so that the cooling water can be evenly sprayed on the furnace surface to improve the cooling effect. A pressure gauge and a thermometer are also installed at the inlet device to monitor the inlet pressure and temperature of the cooling water.

[0035] As a preferred embodiment, after the cooling water enters the blast furnace, it circulates in the furnace body, absorbs the heat of the furnace body and is discharged from the drain port. In order to improve the recycling rate of cooling water, a circulating water pump is provided at the drain port to pump the drainage water back to the blast furnace cooling water inlet device to form an internal cooling water circulation system. The flow rate and head of the circulating water pump are selected according to the requirements of the cooling water circulation volume of the blast furnace, and are linked with the external water supply pump group to ensure the stable operation of the entire water supply system.

[0036] As a preferred implementation, various sensors are installed at various key locations of the water supply system, such as the water source inlet pipe, the outlet of the water supply pump group, the main pipeline, the connecting branch pipe, the inlet and outlet of the blast furnace cooling water, etc., including pressure sensors, flow sensors, temperature sensors, liquid level sensors, etc. These sensors collect the operating data of the water supply system in real time and transmit it to the data acquisition module of the control system.

[0037] Working principle of the present invention:

[0038] The present invention effectively improves the safety and reliability of the water supply for the auxiliary systems of two blast furnaces. Since the comprehensive pump sets of the blast furnace water stations adopt a one - use - one - standby mode, when an abnormality occurs in a certain section of the power distribution system or a certain pump fails to supply water, in the absence of a standby, because the parameters of the comprehensive water pumps of the two blast furnace water stations are the same, through connection, the comprehensive pump set of the second blast furnace water station can be used as the standby of the comprehensive pump set of the first blast furnace water station, and the water supply safety is improved; at the same time, if an abnormality occurs in the power distribution system of the second section of the second blast furnace water station, the comprehensive pump set of the first blast furnace water station can be started to supply water into the general water supply network of the comprehensive water pumps of the second blast furnace water station, which can meet the production requirements and prevent the blast furnace from shutting down for maintenance, reducing the economic losses caused by the shutdown for maintenance.

[0039] Implementation Case 1:

[0040] As Figure 1 A water supply connection method for two blast furnaces as shown, which includes a blast furnace water station, an insertion - type flowmeter and a water supply and return pipeline. The blast furnace water station includes a first blast furnace water station and a second blast furnace water station. The first blast furnace water station and the second blast furnace water station are connected through the water supply and return pipeline. The first blast furnace water station and the second blast furnace water station are respectively connected to a first water supply pump station and a second water supply pump station. The first water supply pump station and the second water supply pump station are equipped with comprehensive pump sets for the blast furnace water station. The insertion - type flowmeter is connected to the water supply and return pipeline. The blast furnace water station is equipped with users of the comprehensive pump set of the blast furnace water station and a blast furnace water station cooling tower.

[0041] The integrated pump group of the blast furnace water station includes the first integrated pump group 1 of the blast furnace water station and the second integrated pump group 2 of the blast furnace water station. The first water supply pumping station is equipped with the first integrated pump group 1 of the blast furnace water station, and the second water supply pumping station is equipped with the second integrated pump group 2 of the blast furnace water station. The first integrated pump group 1 of the blast furnace water station and the second integrated pump group 2 of the blast furnace water station are respectively placed in different low-voltage power supply sections and continuously supply water outward. The first water supply pumping station supplies cooling water for the blast furnace gas pressure recovery turbine power generation device and the gas holder booster. The users of the integrated pump group of the blast furnace water station include the first user 3 of the integrated pump group of the blast furnace water station and the second user 4 of the integrated pump group of the blast furnace water station. The first blast furnace water station and the second blast furnace water station respectively supply cooling water for the hydraulic stations above and below the troughs of two blast furnaces. The cooling towers of the blast furnace water station include the first cooling tower 5 of the blast furnace water station and the second cooling tower 6 of the blast furnace water station. The first cooling tower 5 of the blast furnace water station is equipped with a first cooling tower water inlet valve 7, and the second cooling tower 6 of the blast furnace water station is equipped with a second cooling tower water inlet valve 8. A butterfly valve is provided on the return water pipeline. The water supply and return water pipeline includes a first water supply connecting pipe 9, a second water supply connecting pipe 10, a first return water connecting pipe 11 and a second return water connecting pipe 12. The butterfly valve includes a first electric valve 13, a second electric valve 14, a third electric valve 15 and a fourth electric valve 16. The first electric valve 13 is connected to the first water supply connecting pipe 9, and the first water supply connecting pipe 9 is connected to the water supply pipeline 17 of the first blast furnace water station. The second electric valve 14 is connected to the second water supply connecting pipe 10, and the second water supply connecting pipe 10 is connected to the water supply pipeline 18 of the second blast furnace water station. The third electric valve 15 is connected to the first return water connecting pipe 11, and the first return water connecting pipe 11 is connected to the return water pipeline 19 of the first blast furnace water station. The fourth electric valve 16 is connected to the second return water connecting pipe 12, and the second return water connecting pipe 12 is connected to the return water pipeline 20 of the second blast furnace water station. When a failure occurs in the two-section power distribution system or the water pump of the second blast furnace water station, the second blast furnace water station can use the first integrated pump group of the first blast furnace water station to supply water to meet the water demand for blast furnace production. At the same time, when a failure occurs in a certain section of the power distribution or the water pump of the first blast furnace water station, the second integrated pump group 2 of the second blast furnace water station can be used as a standby pump for the first integrated pump group of the first blast furnace water station. Regarding the balance problem of the connected water supply between the first blast furnace water station and the second blast furnace water station, insertion flow meters are added to the cooling tower water inlet pipelines of the two blast furnace water stations. The insertion flow meters include a first insertion flow meter 21 and a second insertion flow meter 22. Keep the upper tower valve of one water station fully open, and use the upper tower valve of the other water station to adjust the amount of water returning to the water tank of each water station to ensure the liquid level balance of the two blast furnace water stations during the connected water supply period.

[0042] Two blast furnaces are respectively equipped with one blast furnace water station. There are two users of the comprehensive pump group in the blast furnace water station. There are two pumps in total, one in use and one in standby. Water is supplied to the users through pipelines. The two comprehensive pump groups of the blast furnace water station are respectively placed in different low-voltage power supply sections. The parameters of a single comprehensive pump group of the blast furnace water station are: the flow rate is 565 m 3 / h, and the head is 60 m; there are 9 blast furnace auxiliary systems such as the hydraulic stations above and below the blast furnace trough and coal injection in the comprehensive pump group of the blast furnace water station. There are 3 water pumps in total, two in use and one in standby. Among them, the first comprehensive pump group 1 of the blast furnace water station is placed in the first power supply section, and the second comprehensive pump group 2 and the third comprehensive pump group of the blast furnace water station are placed in the second power supply section. Water is sent to the users of the comprehensive pump group of the blast furnace water station through the laid pipelines. The parameters of the comprehensive water pumps of the first blast furnace water station and the second blast furnace water station are the same. In order to improve the water supply safety and reliability of the two blast furnace water stations, the water supply connecting pipes of the two blast furnace water stations are connected, and the first electric valve 13 and the second electric valve 14 are arranged in the middle. At the same time, the return water pipelines are connected through pipelines at the ends of the two blast furnace water stations, and the electric valve 3 and the electric valve 4 are arranged in the middle. Two valves are arranged on both the water supply and return water pipelines. In order to balance the water volume, an insertion flow meter 5 is arranged on the water supply pipeline 17 of the first blast furnace water station of the first blast furnace water station cooling tower 5, and an insertion flow meter 6 is arranged on the cooling tower water inlet pipeline of the No. 2 blast furnace water station. When the two blast furnace water stations are connected for water supply, the water supply flow rates of the two blast furnace water stations are respectively used to adjust the first cooling tower water inlet valve 7 and the second cooling tower water inlet valve 8 to make the water supply and return of the two blast furnace water stations balanced.

[0043] Through the connected water supply between the two blast furnace water stations, when the 2nd power distribution system or water pump of the second blast furnace water station fails, the second blast furnace water station can use the comprehensive pump of the first blast furnace water station to supply water to meet the water demand of blast furnace production. At the same time, when a certain section of the power distribution or water pump of the first blast furnace water station fails, the second comprehensive pump group 2 of the second blast furnace water station can be used as the standby pump of the first comprehensive pump group 1 of the first blast furnace water station, improving the water supply safety and reliability of the system and ensuring the stable production of the two blast furnaces.

[0044] Embodiment 2:

[0045] In this embodiment, such as Figure 1 shown, a method for connecting and supplying water to two blast furnaces has the same technical means as the water supply method in Embodiment 1.

[0046] The cooling water discharged from the blast furnace contains a certain amount of impurities and pollutants, such as mill scale, water scale, etc. To ensure the water supply quality, a water treatment device is set on the return water pipeline, including a sedimentation tank, a filter, and chemical treatment equipment. The sedimentation tank is used to remove most of the solid impurities in the water, the filter further filters out tiny particulate matters, and the chemical treatment equipment adds chemicals such as scale inhibitors and corrosion inhibitors to prevent water scale from forming on the inner walls of pipelines and equipment and plays a role in corrosion inhibition protection for metal equipment. The treated cooling water re-enters the water supply pump group to achieve recycling.

[0047] The core of the control system is the control algorithm module. It performs operation and analysis according to the collected operation data through the pre-set control strategies and mathematical models, and automatically generates control instructions for equipment such as the water supply pump group and the electric control valve. For example, according to the actual water consumption requirements of two blast furnaces and the pressure change in the main pipeline, the fuzzy control algorithm or the PID control algorithm is used to adjust the rotation speed of the water supply pump group and the opening degree of the electric control valve to achieve precise water supply and stable pressure control.

[0048] The control system is equipped with a human-machine interface (HMI), which is in the form of an industrial touch screen or computer monitoring software. Operators can intuitively view information such as the process flow diagram of the water supply system, the operation status of equipment, real-time operation data, and historical data curves through the human-machine interface. At the same time, operators can perform manual operation interventions on the interface, such as switching the water supply mode, setting control parameters, etc., to improve the operability and flexibility of the system.

[0049] The main functions of the present invention:

[0050] In the present invention, when operating normally, the two blast furnaces are independently supplied with water to avoid mutual influence, and the maintenance of relevant equipment can be arranged during the blast furnace shutdown; through the way of connecting the two blast furnaces for water supply, the combined pump groups of the two blast furnace water stations can be used as backups for each other, improving the system's ability to resist risks in terms of ensuring supply and further enhancing the water supply safety and reliability of the system; the design adopts the method of fully opening the upper tower valve of one water station and using the valve of the other water station for adjustment, which can meet the operation requirements of non-overflow of the two water stations and non-pressure buildup in the pipe network.

[0051] In summary, after reading the documents of the present invention, various other corresponding transformation schemes made by ordinary technicians in the art without creative mental labor according to the technical solutions and technical concepts of the present invention all fall within the scope protected by the present invention.

[0052] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by terms such as "upper end face", "lower end face", "top", "bottom", "left", "right", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention, so they cannot be understood as limitations on the actual use directions of the present invention.

[0053] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and the description of the present invention.

Claims

1. A method for connecting and supplying water to two blast furnaces, characterized in that It includes a blast furnace water station, an insertion flowmeter, and supply and return water pipelines. The blast furnace water station includes a first blast furnace water station and a second blast furnace water station. The first blast furnace water station and the second blast furnace water station are connected by the supply and return water pipelines. The first blast furnace water station and the second blast furnace water station are respectively connected to a first water supply pumping station and a second water supply pumping station. The first water supply pumping station and the second water supply pumping station are equipped with a comprehensive pump group for the blast furnace water station. The insertion flowmeter is connected to the supply and return water pipelines. The blast furnace water station is provided with users of the comprehensive pump group for the blast furnace water station and a cooling tower for the blast furnace water station.

2. A method for connecting and supplying water to two blast furnaces according to claim 1, characterized in that The comprehensive pump group for the blast furnace water station includes a first comprehensive pump group for the blast furnace water station and a second comprehensive pump group for the blast furnace water station. The first water supply pumping station is equipped with the first comprehensive pump group for the blast furnace water station, and the second water supply pumping station is equipped with the second comprehensive pump group for the blast furnace water station.

3. A method for connecting and supplying water to two blast furnaces according to claim 2, characterized in that, The first comprehensive pump group for the blast furnace water station and the second comprehensive pump group for the blast furnace water station are respectively placed in different low-voltage power supply sections and continuously supply water outward.

4. A method for connecting and supplying water to two blast furnaces according to claim 1, characterized in that, The first water supply pumping station supplies cooling water for the blast furnace gas pressure recovery turbine power generation device and the gas holder pressurizer. The users of the comprehensive pump group for the blast furnace water station include users of the first comprehensive pump group for the blast furnace water station and users of the second comprehensive pump group for the blast furnace water station.

5. A method for connecting and supplying water to two blast furnaces according to claim 1, characterized in that, The first blast furnace water station and the second blast furnace water station respectively supply cooling water for the hydraulic stations above and below the troughs of two blast furnaces. The cooling tower for the blast furnace water station includes a first cooling tower for the blast furnace water station and a second cooling tower for the blast furnace water station. The first cooling tower for the blast furnace water station is provided with a first cooling tower water inlet valve, and the second cooling tower for the blast furnace water station is provided with a second cooling tower water inlet valve.

6. A method for connecting and supplying water to two blast furnaces according to claim 1, characterized in that, The supply and return water pipelines are provided with butterfly valves. The supply and return water pipelines include a first water supply connecting pipe, a second water supply connecting pipe, a first return water connecting pipe, and a second return water connecting pipe. The butterfly valves include a first electric valve, a second electric valve, a third electric valve, and a fourth electric valve.

7. A method for connecting and supplying water to two blast furnaces according to claim 6, characterized in that, The first electric valve is connected to the first water supply connecting pipe, and the first water supply connecting pipe is connected to the water supply pipeline of the first blast furnace water station. The second electric valve is connected to the second water supply connecting pipe, and the second water supply connecting pipe is connected to the water supply pipeline of the second blast furnace water station.

8. A method for connecting and supplying water to two blast furnaces according to claim 6, characterized in that, The third electric valve is connected to the first return water connecting pipe, and the first return water connecting pipe is connected to the return water pipeline of the first blast furnace water station. The fourth electric valve is connected to the second return water connecting pipe, and the second return water connecting pipe is connected to the return water pipeline of the second blast furnace water station.

9. A method for connecting and supplying water to two blast furnaces according to claim 1, characterized in that, When there are faults in the two-section power distribution system or pumps of the second blast furnace water station, the second blast furnace water station can use the first comprehensive pump group of the first blast furnace water station for water supply to meet the water demand for blast furnace production. At the same time, when there is a fault in a certain section of power distribution or pump of the first blast furnace water station, the comprehensive pump group of the second blast furnace water station can be used as a standby pump for the first comprehensive pump group of the first blast furnace water station.

10. A method for connecting and supplying water to two blast furnaces according to claim 1, characterized in that, Regarding the balance problem of the connected water supply of the first blast furnace water station and the second blast furnace water station, insertion flowmeters are added to the cooling tower water inlet pipelines of the two blast furnace water stations. The insertion flowmeters include a first insertion flowmeter and a second insertion flowmeter. Keep the upper tower valve of one water station fully open, and use the upper tower valve of the other water station to adjust the water volume returning to the water tank of each water station to ensure the liquid level balance of the two blast furnace water stations during the connected water supply.

Images