Blast furnace tuyere accident water circulation cooling recovery device and method thereof

Abstract

The invention provides a blast-furnace tuyere accident water circulation cooling recovery device and a blast-furnace tuyere accident water circulation cooling recovery method. The blast furnace tuyere accident water circulation cooling recovery device comprises a first-stage sedimentation water tank, a second-stage sedimentation water tank and a third-stage sedimentation water tank, at least two water outlets are formed in the first-stage sedimentation water tank in the height direction, and all the water outlets of the first-stage sedimentation water tank are communicated with a main water inlet pipeline in the second-stage sedimentation water tank through branch pipelines; a pressurizing spray head is arranged on a water outlet of the main water inlet pipeline in the secondary sedimentation water tank, an impeller is arranged in the secondary sedimentation water tank and is positioned below the pressurizing spray head, and a precipitant spray head is arranged above the secondary sedimentation water tank; and drain outlets are formed in the bottoms of the first-stage sedimentation water tank, the second-stage sedimentation water tank and the third-stage sedimentation water tank. According to the blast-furnace tuyere accident water circulation cooling recovery device, rapid purification and self-recovery of accident water which is large in flow fluctuation and contains impurities are achieved, and the purposes of saving energy and recycling waste water are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of water recovery in the metallurgical field, and in particular to a blast furnace tuyere accident water circulation cooling recovery device and a method thereof. Background Art

[0002] As the key part of the blast furnace hearth cooling, if the tuyere is damaged and leaking but not seriously, the method of disconnecting the closed circulation cooling system and supplying water to the damaged tuyere separately can be adopted to achieve continuous cooling and ensure the continuous production of the blast furnace. At present, the accident cooling water of these damaged tuyere is directly discharged at the production site, resulting in a waste of more than 30 cubic meters of water per hour for a single bad tuyere. In addition, the pollution content of these externally discharged water is relatively low, and after being mixed with sewage for post-treatment, the water purification cost will increase.

[0003] Therefore, based on the characteristics of large water circulation volume, low pollutant content and dynamic changes in discharge volume caused by tuyere accidents, a device and method of use are needed that can match the number of tuyere damages and changes in discharge volume. Summary of the invention

[0004] The main purpose of the present invention is to provide a blast furnace tuyere accident water circulation cooling recovery device and method thereof, aiming to.

[0005] To achieve the above object, the present invention provides a blast furnace tuyere accident water circulation cooling recovery device, comprising a primary sedimentation water tank, a secondary sedimentation water tank and a tertiary sedimentation water tank sequentially connected by pipelines, wherein: The first-level sedimentation water tank is used to receive accidental water from the tuyere. At least two water outlets are arranged in the height direction of the first-level sedimentation water tank. All water outlets of the first-level sedimentation water tank are connected with the main water inlet pipe inside the second-level sedimentation water tank through branch pipes. A solenoid valve is installed on the branch pipe. A pressurized nozzle is arranged on the water outlet of the main water inlet pipe inside the second-level sedimentation water tank. An impeller is installed inside the second-level sedimentation water tank, and the impeller is located below the pressurized nozzle. A precipitant nozzle is installed above the second-level sedimentation water tank. Sewage outlets are arranged at the bottoms of the first-level sedimentation water tank, the second-level sedimentation water tank and the third-level sedimentation water tank.

[0006] Preferably, a first booster pump is installed on the main pipeline inside the secondary sedimentation water tank.

[0007] Preferably, the blast furnace tuyere accident water circulation cooling recovery device also includes a water recovery device connected to the tertiary sedimentation water tank through a pipeline, the water recovery device includes a water storage tank connected to the tertiary sedimentation water tank, a water supply pipe located above the water storage tank, and a drain pipe connected to the water outlet of the water tank, and the outlet of the drain pipe is located at the blast furnace tuyere to cool it.

[0008] Preferably, a second pressure pump is installed on the drainage pipe.

[0009] Preferably, a solenoid valve and a flow meter are installed on the pipeline connecting the secondary sedimentation water tank and the tertiary sedimentation water tank.

[0010] Preferably, a liquid level measuring device and / or a liquid level display device are installed inside the primary sedimentation water tank, the secondary sedimentation water tank, the tertiary sedimentation water tank and the water storage tank.

[0011] Preferably, a solenoid valve is installed on the pipeline connecting the tertiary sedimentation water tank and the water storage tank.

[0012] Preferably, the inner diameter of the tertiary sedimentation water tank is 1.5 to 2 times the inner diameter of the secondary sedimentation water tank.

[0013] The present invention further proposes a recovery method based on the above-mentioned blast furnace tuyere accident water circulation cooling recovery device, comprising the following steps: The cooling water of the blast furnace tuyere accident is discharged into the primary sedimentation water tank, and the solenoid valve on the branch pipeline connected to the corresponding water outlet is opened according to the liquid level inside the primary sedimentation water tank and the number of damaged tuyere; The cooling water inside the primary sedimentation water tank enters the main pipeline through the branch pipeline. The pressure of the first booster pump is selected according to the liquid level inside the primary sedimentation water tank to ensure that the impeller can form sufficient driving force. The cooling water in the main pipeline is sprayed into the secondary sedimentation water tank through the booster nozzle at the outlet of the main pipeline to drive the impeller to rotate. At the same time, the precipitant nozzle on the secondary sedimentation water tank is opened to spray the precipitant for sedimentation purification; After sedimentation in the secondary sedimentation tank, the clean water on the top flows into the tertiary sedimentation tank for further sedimentation and purification.

[0014] Preferably, after the clean water in the upper part of the secondary sedimentation water tank flows into the tertiary sedimentation water tank for another sedimentation purification step, the step further includes: The clean water on the upper part of the tertiary sedimentation water tank after sedimentation flows into the water storage tank. The water supply pipe is opened for water supply according to the liquid level control of the water storage tank. The liquid level of the tertiary sedimentation water tank is adjusted according to the opening of the solenoid valve on the outlet side of the tertiary sedimentation water tank. At the same time, when an accident occurs at the blast furnace tuyere, the water supply pipe of the water storage tank is opened to cool the tuyere.

[0015] The blast furnace tuyere accident water circulation cooling recovery device proposed by the present invention has the following beneficial effects: 1. The accident water is purified through a multi-stage sedimentation structure, which realizes the rapid purification and self-recycling of accident water with large flow fluctuations and impurities, achieving energy saving and reuse of wastewater; 2. Equipped with a three-stage sedimentation water tank to balance the water level of the second-stage sedimentation water tank, the water level of the second-stage sedimentation water tank is controlled within the working range of the impeller, ensuring the second-stage purification; 3. The water level monitoring can be linked with the three-level sedimentation tank and the water storage tank to balance the total system water volume and meet the cooling needs of the accident vents; 4. The recovery device has the advantages of simple structure, stable and reliable operation and easy implementation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a preferred embodiment of a blast furnace tuyere accident water circulating cooling recovery device of the present invention.

[0017] In the figure, 1-first-stage sedimentation water tank, 2-second-stage sedimentation water tank, 21-impeller, 22-first pressure pump, 23-pressure nozzle, 24-precipitant nozzle, 3-third-stage sedimentation water tank, 31-flow meter, 4-water storage tank, 41-second pressure pump, 42-water supply pipe.

[0018] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0019] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0020] It should be noted that in the description of the present invention, the terms "transverse", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0021] The invention provides a blast furnace tuyere accident water circulation cooling recovery device.

[0022] Reference Figure 1 In this preferred embodiment, a blast furnace tuyere accident water circulation cooling recovery device includes a primary sedimentation water tank 1, a secondary sedimentation water tank 2 and a tertiary sedimentation water tank 3 which are sequentially connected through pipelines, wherein: The first-level sedimentation water tank 1 is used to receive accidental water from the tuyere. At least two water outlets are arranged in the height direction of the first-level sedimentation water tank 1 (three water outlets are taken as an example for specific description in the figure of this embodiment). All water outlets of the first-level sedimentation water tank 1 are connected with the main water inlet pipe inside the second-level sedimentation water tank 2 through branch pipes. A solenoid valve is installed on the branch pipe. A pressurized nozzle 23 is arranged on the water outlet of the main water inlet pipe inside the second-level sedimentation water tank 2. An impeller 21 is installed inside the second-level sedimentation water tank 2. The impeller 21 is located below the pressurized nozzle 23. A precipitant nozzle 24 is installed above the second-level sedimentation water tank 2. Sewage outlets are arranged at the bottoms of the first-level sedimentation water tank 1, the second-level sedimentation water tank 2 and the third-level sedimentation water tank 3.

[0023] The primary sedimentation water tank 1 is located below the recovery water tank, and the accident water at the tuyere is automatically recovered through the height difference. The bottoms of the primary sedimentation water tank 1, the secondary sedimentation water tank 2 and the tertiary sedimentation water tank 3 are all provided with sewage outlets, which need to be opened regularly to discharge sediment. A pressurized nozzle 23 and an impeller 21 are provided inside the secondary sedimentation water tank 2. The pressurized nozzle 23 drives the impeller 21 to rotate, thereby performing secondary rapid purification on the recovered water inside the secondary sedimentation water tank 2 to which the precipitant is sprayed in real time.

[0024] In this embodiment, a three-layer arrangement of the first-level sedimentation water tank 1 is taken as an example for specific explanation, and water level gauges R1, R2, and R3 are arranged on each layer. This is to dynamically adjust the valve opening of each layer according to the recycled water volume change signal to ensure the first-level sedimentation treatment capacity of accident water; the reason why the first layer is designed to be able to treat a maximum of 2 bad tuyere accident waters is because in 60% of cases, the number of damaged tuyere of the blast furnace is 1 to 2; the reason why the second layer is designed to be able to treat a maximum of 4 bad tuyere accident waters is because in 20% to 30% of cases, the number of damaged tuyere of the blast furnace is 3 to 6, and usually starting two layers can ensure 80 to 90% of the purification and water supply needs of the accident tuyere; the reason why the third layer is designed to be able to treat a maximum of 8 bad tuyere accident waters is because in about 10% of cases, the number of damaged tuyere of the blast furnace is ≥7, which ensures the ability of the device to recover accident water when the tuyere is abnormally damaged.

[0025] Furthermore, a first booster pump 22 is installed on the main pipeline inside the secondary sedimentation water tank 2. When the liquid level inside the primary sedimentation water tank 1 is high, the first booster pump 22 may not be turned on; when the liquid level inside the primary sedimentation water tank 1 is medium, the power of the first booster pump 22 may be reduced; when the liquid level inside the primary sedimentation water tank 1 is low, the first booster pump 22 may be turned on at full power.

[0026] In addition, the bottom of the first-stage sedimentation water tank 1 is higher than the bottom of the second-stage water tank in order to increase the water discharge power of the second-stage sedimentation pressure head, thereby reducing the use of the first pressure pump 22 and achieving energy saving.

[0027] Further, the blast furnace tuyere accident water circulation cooling recovery device also includes a water recovery device connected to the three-stage sedimentation water tank 3 through a pipeline, and the water recovery device includes a water storage tank 4 connected to the three-stage sedimentation water tank 3, a water supply pipe 42 located above the water storage tank 4, and a drain pipe connected to the water outlet of the water tank, and the outlet of the drain pipe is located at the blast furnace tuyere to cool it. By setting the water recovery device, the recovered water can be used for the next blast furnace tuyere accident, which is more energy-saving and environmentally friendly. The reason for designing the water supply pipe 42 is to achieve a dynamic balance between the amount of recovered water and the amount of water supplied, so that there is sufficient water to supply the accident tuyere to meet its cooling intensity.

[0028] Furthermore, a second booster pump 41 is installed on the drain pipe. By providing the second booster pump 41, the recovered accident water can enter the accident vent again for cooling, thereby achieving the purpose of recycling.

[0029] Furthermore, a solenoid valve and a flow meter 31 are installed on the pipe connecting the secondary sedimentation water tank 2 and the tertiary sedimentation water tank 3, so that the water level inside the secondary sedimentation water tank 2 can be controlled. By controlling the water level of the secondary sedimentation water tank 2, on the one hand, it is possible to avoid turning on the first booster pump 22, and on the other hand, by controlling the water level, the water level of the secondary sedimentation water tank 2 can be controlled to have 1 / 3 to 2 / 3 of the water level covering the impeller 21, so that the impeller 21 can effectively stir the precipitant and the accident water, thereby improving the purification and sedimentation efficiency.

[0030] Furthermore, a liquid level measuring device and / or a liquid level display device are installed inside the primary sedimentation water tank 1, the secondary sedimentation water tank 2, the tertiary sedimentation water tank 3 and the water storage tank 4. The liquid level measuring device is a liquid level sensor, and the liquid level display device is a liquid level scale. All liquid level sensors and solenoid valves are electrically connected to the controller, thereby realizing automatic control and saving manual operation process.

[0031] Furthermore, a solenoid valve is installed on the pipe connecting the tertiary sedimentation water tank 3 and the water storage tank 4. Adjusting the solenoid valve of the tertiary sedimentation water tank 3 can stabilize the water level of the secondary sedimentation water tank 2 and ensure its sedimentation effect. In addition, the inner diameter of the tertiary sedimentation water tank 3 is 1.5 to 2 times the inner diameter of the secondary sedimentation water tank 2. The reason why the inner diameter of the tertiary sedimentation water tank 3 is larger is to reduce the water velocity and settle and separate smaller impurities in the accident water.

[0032] The working process of the blast furnace tuyere accident water circulation cooling recovery device is as follows: Taking the system with a three-stage sedimentation device as an example, the recovered and purified accident water is sent to the accident tuyere again through the second booster pump 41 to cool it, so as to achieve the purification and recycling of the accident water. After the tuyere is damaged, the accident water enters the accident water recovery pipe through the collection tank, and then the larger debris in the accident water is precipitated through the first-level sedimentation tank 1. The accident water volume and the water level measured by the scales R1, R2, and R3 can be combined to reasonably match the opening of the A1, A2, and A3 electromagnetic valves to ensure the stability of the first-level sedimentation; after the accident water enters the second-level sedimentation tank 2, the water is mainly pressurized by the first booster pump 22, and then the pressurized water drives the impeller 21 to rotate through the injection pipe head. At the same time, the precipitant is sprayed from the upper part of the second-level sedimentation tank 2. When the precipitant enters the accident water and is stirred by the impeller 21, the accident water can be quickly purified. The secondary sedimentation water tank 2 is equipped with a liquid level gauge R4 and a solenoid valve B1 to control the water level; the tertiary sedimentation water tank 3 is mainly used to further purify the purified water in the secondary sedimentation. The sedimentation water tank is equipped with a liquid level gauge R5 and a solenoid valve C1 to balance its water level; behind the tertiary sedimentation water tank 3 is a water storage tank 4, which is equipped with a water supply pipe 42 to balance the system water volume according to the change of the liquid level; finally, the purified water enters the total water recovery system.

[0033] This recovery device adopts a three-stage sedimentation water tank 3. This is because the total amount of accident water at the tuyere is unstable, and the maximum water volume difference is 7 to 8 times. Therefore, a multi-stage structure is required to meet the needs of total system water balance and stable purification; the reason why the device uses the liquid level difference between the tuyere platform and the water recovery system is to use potential energy to recover accident water and achieve energy saving; the first-level sedimentation water tank 1 in the device is to remove larger impurities in the accident water; the reason why a three-layer structure is set in the first-level sedimentation water tank 1 is to ensure that the first-level sedimentation water tank 1 has the ability to handle accident water with different flow rates; the reason why R1, R2, R3 water level gauges and solenoid valves A1, A2, A3 are designed in the three-layer structure of the first-level sedimentation water tank 1 is to reasonably distribute and treat the accident water according to the changes in the amount of recovered water.

[0034] The blast furnace tuyere accident water circulation cooling recovery device proposed in this embodiment has the following beneficial effects: 1. The accident water is purified through a multi-stage sedimentation structure, which realizes the rapid purification and self-recycling of accident water with large flow fluctuations and impurities, achieving energy saving and reuse of wastewater; 2. A tertiary sedimentation water tank 3 is provided to balance the water level of the secondary sedimentation water tank 2, so that the water level of the secondary sedimentation water tank 2 is controlled within the working range of the impeller 21, thereby ensuring secondary purification; 3. The water level monitoring can be linked with the three-stage sedimentation tank 3 and the water storage tank 4 to balance the total system water volume and meet the cooling requirements of the accident vents; 4. The recovery device has the advantages of simple structure, stable and reliable operation and easy implementation.

[0035] The present invention further provides a recovery method for a blast furnace tuyere accident water circulation cooling recovery device.

[0036] In this preferred embodiment, a recovery method based on the above-mentioned blast furnace tuyere accident water circulation cooling recovery device comprises the following steps: Step S10, drain the cooling water of the blast furnace tuyere accident into the primary sedimentation water tank 1, and select to open the solenoid valve on the branch pipe connected to the corresponding water outlet according to the liquid level inside the primary sedimentation water tank 1 and the number of damaged tuyere; Step S20, the cooling water inside the primary sedimentation water tank 1 enters the main pipeline through the branch pipeline, the pressure of the first booster pump 22 is selected according to the liquid level inside the primary sedimentation water tank 1 to ensure that the impeller 21 can form sufficient driving force, the cooling water in the main pipeline is sprayed into the secondary sedimentation water tank 2 through the booster nozzle 23 at the outlet of the main pipeline to drive the impeller 21 to rotate, and at the same time, the precipitant nozzle 24 on the secondary sedimentation water tank 2 is opened to spray the precipitant for sedimentation purification; Step S30, the clean water on the upper part of the secondary sedimentation water tank 2 after sedimentation flows into the tertiary sedimentation water tank 3 for another sedimentation purification.

[0037] In step S20, when the water level is too low, the first booster pump 22 is turned on to ensure the outlet water pressure, thereby ensuring the stirring effect of the impeller 21. At the same time, the pressure of the first booster pump 22 is adjusted according to different water levels in order to fully utilize the potential energy of the recovered water and reduce energy consumption.

[0038] Furthermore, after step S30, the following steps are further included: Step S40, the clean water in the upper part of the tertiary sedimentation water tank 3 after sedimentation flows into the water storage tank 4, and the water supply pipe 42 is opened for water supply according to the liquid level control of the water storage tank 4. The liquid level of the tertiary sedimentation water tank is adjusted according to the opening of the solenoid valve on the outlet side of the tertiary sedimentation water tank 3. At the same time, when an accident occurs at the blast furnace tuyere, the water supply pipe 42 of the water storage tank 4 is opened to cool the tuyere.

[0039] When adjusting the liquid level of the first-stage sedimentation water tank according to the opening of the solenoid valve on the outlet side of the tertiary sedimentation water tank 3, the matching scale R4 water level and the solenoid valve C1 are linked to ensure that 1 / 3~2 / 3 of the water level in the secondary sedimentation water tank 2 covers the impeller 21, so that the impeller 21 can effectively stir the precipitant and the accident water to ensure the sedimentation effect.

[0040] The following specifically describes the recovery method of the blast furnace tuyere accident water circulation cooling recovery device (the following description is made using a liquid level display device as an example, and of course a liquid level sensor can also be used for automatic control).

[0041] The first-level sedimentation water tank 1 is divided into three layers according to the recovered water level. Each layer is equipped with a water level scale, namely R1, R2, and R3. Each layer predicts and adjusts the opening of the corresponding electromagnetic valves A1, A2, and A3 according to the number of damaged tuyere water replenishment and the water level scale. The A1 valve can guarantee a maximum of 2 bad tuyere accident water; the A2 valve cross-sectional area is twice that of A1, and can guarantee a maximum of 4 bad tuyere accident water; the A3 cross-sectional area is 4 times that of A1, and can guarantee a maximum of 8 bad tuyere accident water. The specific adjustment method is shown in Table 1. In normal production, 0 to 3 tuyere are damaged in 80% of the cases, and the number of bad tuyere under abnormal furnace conditions does not exceed 8, and the number of bad tuyere under special accidents is greater than 10.

[0042] Table 1 Control scheme of valves at each level in the first-stage sedimentation tank 1

[0043] When 1 to 2 tuyere outlets are damaged, for the secondary sedimentation water tank 2, since the water level of the primary sedimentation water tank 1 is relatively low and the water level is within the R1 water level scale range, it is necessary to start the first booster pump 22 to increase the water outlet pressure of the booster nozzle 23 to ensure that the pressurized water has sufficient driving force on the impeller 21, so that the impeller 21 can be stirred quickly and promote the aggregation and sedimentation of debris in the water; when 3 to 6 tuyere outlets are damaged, the water level reaches the R2 water level scale range. At this time, the water outlet pressure of the booster nozzle 23 can be guaranteed by relying on the water level height, and the pressure of the first booster pump 22 can be appropriately reduced by 30 to 60%; when 7 to 14 tuyere outlets are damaged, the water level reaches the R3 water level scale range. Relying on the potential energy formed by the water level height, it can be ensured that the water outlet pressure of the booster nozzle 23 drives the impeller 21 to rotate quickly, and the first booster pump 22 can be turned off at this time.

[0044] For the tertiary sedimentation water tank 3, the scale R4 of the secondary sedimentation water tank 2 is used to interlock and adjust the solenoid valves C1 and D4 to stabilize the water level in the secondary sedimentation within the range of R4 (within the range of accident water stirred by the impeller 21), and at the same time, balance the total system water volume; in the recycling process, the changes in the inlet and outlet water volume of the water storage tank 4 must also be calculated according to the water level scale R5. When the water loss in the water storage tank 4 reaches a certain volume, water can be replenished through the system water replenishment pipe 42 to keep the total water volume of the water storage tank 4 balanced.

[0045] The recovery method of the blast furnace tuyere accident water circulating cooling recovery device proposed in the present invention realizes the rapid purification and self-recovery of accident water with large flow fluctuations and impurities through the interlocking control of the water level, the pressure valve and each solenoid valve, thereby achieving energy saving and reuse of waste water.

[0046] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A blast furnace tuyere accident water circulation cooling recovery device, characterized in that: It includes a primary sedimentation water tank, a secondary sedimentation water tank and a tertiary sedimentation water tank which are sequentially connected by pipelines, wherein: The first-level sedimentation water tank is used to receive accidental water from the tuyere. At least two water outlets are arranged in the height direction of the first-level sedimentation water tank. All water outlets of the first-level sedimentation water tank are connected with the main water inlet pipe inside the second-level sedimentation water tank through branch pipes. A solenoid valve is installed on the branch pipe. A pressurized nozzle is arranged on the water outlet of the main water inlet pipe inside the second-level sedimentation water tank. An impeller is installed inside the second-level sedimentation water tank, and the impeller is located below the pressurized nozzle. A precipitant nozzle is installed above the second-level sedimentation water tank. Sewage outlets are arranged at the bottoms of the first-level sedimentation water tank, the second-level sedimentation water tank and the third-level sedimentation water tank.

2. The blast furnace tuyere accident water circulation cooling recovery device according to claim 1, characterized in that: A first booster pump is installed on the main pipeline inside the secondary sedimentation water tank.

3. The blast furnace tuyere accident water circulation cooling recovery device according to claim 2, characterized in that: It also includes a water recovery device connected to the third-level sedimentation water tank through a pipeline. The water recovery device includes a water storage tank connected to the third-level sedimentation water tank, a water supply pipe located above the water storage tank, and a drain pipe connected to the water outlet of the water tank. The outlet of the drain pipe is located at the blast furnace tuyere to cool it.

4. The blast furnace tuyere accident water circulation cooling recovery device according to claim 3, characterized in that: A second pressure pump is installed on the drainage pipe.

5. The blast furnace tuyere accident water circulation cooling recovery device according to claim 2, characterized in that: A solenoid valve and a flow meter are installed on the pipeline connecting the secondary sedimentation water tank and the tertiary sedimentation water tank.

6. The blast furnace tuyere accident water circulation cooling recovery device according to claim 3, characterized in that: The first-stage sedimentation water tank, the second-stage sedimentation water tank, the third-stage sedimentation water tank and the water storage tank are all installed with a liquid level measuring device and / or a liquid level display device.

7. The blast furnace tuyere accident water circulation cooling recovery device according to claim 6, characterized in that: A solenoid valve is installed on the pipeline connecting the three-stage sedimentation water tank and the water storage tank.

8. The blast furnace tuyere accident water circulation cooling recovery device according to any one of claims 2 to 7, characterized in that: The inner diameter of the tertiary sedimentation water tank is 1.5 to 2 times the inner diameter of the secondary sedimentation water tank.

9. A recovery method based on the blast furnace tuyere accident water circulation cooling recovery device according to any one of claims 3 to 8, characterized in that: The following steps are involved: The cooling water of the blast furnace tuyere accident is discharged into the primary sedimentation water tank, and the solenoid valve on the branch pipeline connected to the corresponding water outlet is opened according to the liquid level inside the primary sedimentation water tank and the number of damaged tuyere; The cooling water inside the primary sedimentation water tank enters the main pipeline through the branch pipeline. The pressure of the first booster pump is selected according to the liquid level inside the primary sedimentation water tank to ensure that the impeller can form sufficient driving force. The cooling water in the main pipeline is sprayed into the secondary sedimentation water tank through the booster nozzle at the outlet of the main pipeline to drive the impeller to rotate. At the same time, the precipitant nozzle on the secondary sedimentation water tank is opened to spray the precipitant for sedimentation purification; After sedimentation in the secondary sedimentation tank, the clean water on the top flows into the tertiary sedimentation tank for further sedimentation and purification.

10. The recovery method of the blast furnace tuyere accident water circulation cooling recovery device according to claim 9, characterized in that: After the clean water in the secondary sedimentation water tank flows into the tertiary sedimentation water tank for another sedimentation purification step, the following steps are also included: The clean water on the upper part of the tertiary sedimentation water tank after sedimentation flows into the water storage tank. The water supply pipe is opened for water supply according to the liquid level control of the water storage tank. The liquid level of the tertiary sedimentation water tank is adjusted according to the opening of the solenoid valve on the outlet side of the tertiary sedimentation water tank. At the same time, when an accident occurs at the blast furnace tuyere, the water supply pipe of the water storage tank is opened to cool the tuyere.

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