Water cooling device for cooling wall of blast furnace hearth during medium repair and implementation method

Abstract

The invention provides a blast furnace hearth cooling wall water cooling device during medium repair and an implementation method, the cooling device comprises a plurality of cooling units and a micro-power water pump station, and the plurality of cooling units are sequentially connected and encircle to form a hearth cooling wall; one cooling water pipe in the cooling unit is a unit water inlet pipe, the other cooling water pipe is a unit water outlet pipe, and the unit water inlet pipe, the other cooling water pipes and the unit water outlet pipe are sequentially connected end to end to form a passage for cooling water circulation; the unit water inlet pipe is connected with a water supply pipe of the micro-power water pump station, and the unit water outlet pipe is connected with a water return pipe of the micro-power water pump station. The cooling device is simple in overall implementation and low in manufacturing cost, and the maintenance quality of medium maintenance of the blast furnace is improved. In the middle repair period of the blast furnace, the hearth area cooling wall is always in cooling mode protection, damage of thermal stress to the hearth cooling wall, a furnace shell and a steel structure is eliminated, and the service life of the blast furnace cooling wall and hearth refractory materials is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of metallurgical engineering, and in particular to a water cooling device for a blast furnace hearth cooling wall during medium maintenance and an implementation method thereof. Background Art

[0002] Blast furnace overhaul refers to the maintenance of the blast furnace without replacing the refractory materials and cooling walls in the hearth area. At present, some blast furnaces are overhauled without replacing the residual iron in the hearth, so as to reduce the damage and destruction to the refractory materials in the hearth. The residual heat of the hot molten iron and slag retained in the hearth will damage the cooling walls, furnace shell and attached steel structures in the hearth area. Therefore, in order to protect the cooling walls and steel shell in the hearth area, it is important to continuously maintain the water cooling of the cooling walls in the hearth area.

[0003] In the prior art, the generally adopted method is to maintain the water cooling of the cooling wall in the hearth area and abandon the maintenance and replacement of the cooling wall of the entire blast furnace. Since the damaged cooling wall cannot be replaced or repaired, the life of the cooling wall above the tuyere area is greatly reduced, and the maintenance items of the blast furnace water pump room are seriously restricted.

[0004] Alternatively, before the shutdown, a temporary large water loop pipe is set up in the blast furnace foundation and tuyere area, and the pipes are cut and connected in batches and steps during regular maintenance. All the inlet and outlet water pipes of the cooling wall in the furnace area are collected in the water loop pipe, and then the water in the water loop pipe is cooled by water circulation through gasification cooling or forced circulation of water pumps. This method requires a lot of preparation work before the maintenance, the water loop pipe is large in engineering volume, the construction period is long, and many regular small maintenance opportunities are needed to cut and connect the pipes, which has high investment costs. Summary of the invention

[0005] The object of the present invention is to provide a water cooling device and implementation method for the cooling wall of the blast furnace hearth during maintenance, and to achieve uninterrupted water cooling protection for the cooling wall of the blast furnace hearth by constructing a water cooling system that is separate from the original water cooling system of the blast furnace.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A water-cooling device for the blast furnace hearth cooling stave during medium repair. Inside the hearth cooling stave, a number of cooling water pipes are arranged circumferentially along the hearth cooling stave. The cooling device includes multiple cooling units and a micro-power water pump station. Among them, the multiple cooling units are connected in sequence and enclose the hearth cooling stave together; in one of the cooling water pipes in the cooling unit is the unit inlet water pipe, and one of the cooling water pipes is the unit outlet water pipe. The unit inlet water pipe, the other cooling water pipes, and the unit outlet water pipe are connected end to end in sequence to form a path for cooling water circulation; the unit inlet water pipe is connected to the water supply pipe of the micro-power water pump station, and the unit outlet water pipe is connected to the water return pipe of the micro-power water pump station.

[0008] Further, in the water-cooling device for the blast furnace hearth cooling stave during medium repair described above, the hearth cooling stave includes four layers of cooling staves, which are the bottommost cooling stave, the second-layer cooling stave, the third-layer cooling stave, the fourth-layer cooling stave, and the topmost cooling stave in sequence. A number of cooling water sub-pipes are arranged vertically in each layer of the cooling stave. The corresponding two cooling water sub-pipes in adjacent two layers of the cooling staves are connected to each other. The multiple cooling water sub-pipes in multiple layers of cooling staves are connected in sequence to form the cooling water pipe.

[0009] Further, in the water-cooling device for the blast furnace hearth cooling stave during medium repair described above, four cooling units are provided. The micro-power water pump station supplies cooling water to the four cooling units respectively through four water supply pipes and four water return pipes.

[0010] Further, in the water-cooling device for the blast furnace hearth cooling stave during medium repair described above, the number of cooling water pipes in one cooling unit is an even number. The cooling water pipes are the first cooling water pipe, the second cooling water pipe, the third cooling water pipe,..., the nth cooling water pipe in sequence from one side to the other side of the cooling unit. Among them, the first cooling water pipe is the unit inlet water pipe, and the nth cooling water pipe is the unit outlet water pipe; the unit inlet water pipe, the other cooling water pipes, and the unit outlet water pipe are all connected by metal hoses.

[0011] Further, in the water-cooling device for the blast furnace hearth cooling stave during medium repair described above, the water supply capacity of the micro-power water pump station to a single cooling unit ≥ 50m 3 / h, and the total water supply capacity of the micro-power water pump station ≥ 200m 3 / h.

[0012] Further, in the water-cooling device for the blast furnace hearth cooling stave during medium repair described above, the micro-power water pump station is arranged on the platform of the blast furnace tapping yard or is arranged below the blast furnace foundation.

[0013] On the other hand, an implementation method for water cooling of the blast furnace hearth cooling stave during medium repair is provided, which is implemented by using the above water cooling device, and includes the following steps:

[0014] S1, partition the hearth cooling stave: The hearth cooling staves that do not need to be repaired during the medium repair of the blast furnace are divided into four cooling units in the circumferential direction. Within one cooling unit, from one side of the cooling unit to the other side, there are the 1st cooling water pipe, the 2nd cooling water pipe, the 3rd cooling water pipe,..., the nth cooling water inlet pipe in sequence;

[0015] S2, connect the cooling water pipes within the cooling unit: Disconnect the lower end and the upper end of the cooling water pipe from the cooling wall water inlet system respectively. Take the 1st cooling water pipe as the unit inlet pipe, connect the lower end of the unit inlet pipe to the water supply pipe of the micro-power water pump station, take the nth cooling water pipe as the unit outlet pipe, connect the lower end of the unit outlet pipe to the return water pipe of the micro-power water pump station, and connect the 1st cooling water pipe, other cooling water pipes within the cooling unit, and the nth cooling water pipe in sequence end to end to form a path for cooling water circulation;

[0016] S3, supply water for cooling: Start the micro-power water pump station to supply water to achieve the cooling of the hearth cooling stave.

[0017] Furthermore, in the above implementation method for water cooling of the blast furnace hearth cooling stave during medium repair, in the step S2, connect the lower ends of the 2nd cooling water pipe and the 3rd cooling water pipe with a metal hose, connect the lower ends of the 4th cooling water pipe and the 5th cooling water pipe with a metal hose,..., connect the lower ends of the (n - 2)th cooling water pipe and the (n - 1)th cooling water pipe with a metal hose, connect the upper end of the unit inlet pipe and the upper end of the 2nd cooling water pipe with a metal hose, connect the upper ends of the 3rd cooling water pipe and the 4th cooling water pipe with a metal hose,..., connect the upper end of the (n - 1)th cooling water pipe and the upper end of the unit outlet pipe with a metal hose.

[0018] Furthermore, in the above implementation method for water cooling of the blast furnace hearth cooling stave during medium repair, in the step S2, if there is a cooling water pipe in the lower layer of the highest layer cooling stave that jumps to the height of the upper layer cooling stave, the jumping cooling water pipe is connected to the upper end of the adjacent cooling water pipe according to the number.

[0019] Furthermore, in the above implementation method for water cooling of the blast furnace hearth cooling stave during medium repair, in the step S2, when the total number of all cooling water pipes within the cooling unit is an even number, then take the last 1st cooling water pipe as the unit outlet pipe; when the total number of all cooling water pipes within the cooling unit is an odd number, the last 1st cooling water pipe is carried forward to the next cooling unit, and the penultimate 2nd cooling water pipe is taken as the unit outlet pipe.

[0020] Analysis shows that the present invention discloses a water-cooling device and an implementation method for the blast furnace hearth cooling stave during medium repair. The overall implementation of this cooling device is simple, and the manufacturing cost is low. Before the medium repair of the blast furnace hearth cooling stave, there is no need to manufacture a water circuit ring pipe, and only a metal hose needs to be prepared. During the medium repair of the blast furnace, the cooling staves in the hearth area will not affect the normal replacement or maintenance operations of the cooling staves in other areas, nor will it affect the equipment maintenance in the blast furnace water pump house and the replacement of various types of water pipes in the circulating water system, improving the maintenance quality during the medium repair of the blast furnace. During the medium repair of the blast furnace, the cooling staves in the hearth area are always in the cooling mode protection, eliminating the damage of thermal stress to the blast furnace hearth cooling stave, furnace shell and steel structure, and extending the service life of the blast furnace cooling stave and hearth refractories. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The specification drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. Among them:

[0022] Figure 1 Schematic structural diagram of an embodiment of the present invention.

[0023] Figure 2 Flowchart of the implementation method of an embodiment of the present invention.

[0024] Description of reference numerals: 1 unit inlet water pipe; 2 second cooling water pipe; 3 third cooling water pipe; 4 metal hose; 5 fourth cooling water pipe; 6 fifth cooling water pipe; 7 unit outlet water pipe; 8 sixth cooling water pipe; 9 skip pipe; 10 water supply pipe; 11 return water pipe; 12 micro power pump station. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The present invention will be described in detail below with reference to the drawings and in conjunction with the embodiments. Each example is provided by way of explanation of the present invention rather than limitation of the present invention. In fact, those skilled in the art will clearly understand that modifications and variations can be made to the present invention without departing from the scope or spirit of the present invention. For example, features shown or described as part of one embodiment can be used in another embodiment to produce yet another embodiment. Therefore, it is desirable that the present invention includes such modifications and variations that fall within the scope of the appended claims and their equivalents.

[0026] In the description of the present invention, the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention rather than requiring the present invention to be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. The terms "connected", "connected to", and "arranged" used in the present invention should be understood in a broad sense. For example, it may be a fixed connection or a detachable connection; it may be directly connected or indirectly connected through an intermediate component; it may be a wired connection, a radio connection, or a wireless communication signal connection. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0027] One or more examples of the present invention are shown in the accompanying drawings. The detailed description uses numerical and alphabetical labels to refer to features in the drawings. Similar or like labels in the drawings and the description have been used to refer to similar or like parts of the present invention. As used herein, terms such as "first", "second", and "third" may be used interchangeably to distinguish one component from another, and are not intended to indicate the position or importance of individual components.

[0028] As Figures 1 to 2 shown, according to an embodiment of the present invention, a water-cooling device for cooling the blast furnace hearth cooling wall during medium repair is provided. Inside the blast furnace hearth cooling wall, a plurality of cooling water pipes are arranged along the circumferential direction of the blast furnace hearth cooling wall. As Figure 1 shown, the cooling device includes a plurality of cooling units and a micro-power pump station 12. Among them, the plurality of cooling units are connected in sequence and enclose the blast furnace hearth cooling wall; one cooling water pipe in the cooling unit is the unit inlet pipe 1, and one cooling water pipe is the unit outlet pipe 7. In one cooling unit, the unit inlet pipe 1, other cooling water pipes, and the unit outlet pipe 7 are connected end to end in sequence to form a passage for cooling water circulation; the unit inlet pipe 1 is connected to the water supply pipe 10 of the micro-power pump station 12, and the unit outlet pipe 7 is connected to the return water pipe 11 of the micro-power pump station 12. This cooling device realizes independent operation by constructing a microcirculation water-cooling system that is mutually separated and independent from the original water-cooling system of the blast furnace, provides uninterrupted water-cooling protection for the blast furnace hearth cooling wall during medium repair, has the characteristics of simple construction, short time consumption, does not affect the replacement and repair of cooling walls in other areas, does not affect the shutdown and repair of equipment in the blast furnace water pump house, and at the same time extends the service life of the blast furnace hearth cooling wall. Moreover, it is easy to restore the blast furnace hearth cooling wall to its original appearance after the medium repair is completed.

[0029] Furthermore, the hearths cooling stave comprises four layers of cooling staves, namely the bottommost cooling stave, the second-layer cooling stave, the third-layer cooling stave, the fourth-layer cooling stave and the topmost cooling stave. A number of cooling water sub-pipes are vertically arranged in each layer of cooling stave. The corresponding two cooling water sub-pipes in adjacent two layers of cooling staves are connected to each other, and the multiple cooling water sub-pipes in the multiple layers of cooling staves are sequentially connected to form a cooling water pipe.

[0030] Furthermore, four cooling units are provided. The micro power pump station 12 supplies cooling water to the four cooling units through four water supply pipes 10 and four water return pipes 11 respectively. The micro power pump station 12 supplies cooling water to the four cooling units through four water supply pipes 10 respectively, and recovers the cooling water through the four water return pipes 11, so as to realize uninterrupted water cooling of the hearths cooling staves in the blast furnace during the intermediate relining.

[0031] Furthermore, the number of cooling water pipes in a cooling unit is an even number. The cooling water pipes are successively the first cooling water pipe, the second cooling water pipe 2, the third cooling water pipe 3, ……, the nth cooling water pipe from one side to the other side of the cooling unit. Among them, the first cooling water pipe is the unit water inlet pipe 1, and the nth cooling water pipe is the unit water outlet pipe 7; the unit water inlet pipe 1, the other cooling water pipes and the unit water outlet pipe 7 are all connected through metal hoses 4.

[0032] Furthermore, the water supply capacity of the micro power pump station 12 for a single cooling unit ≥ 50m 3 / h, and the total water supply capacity of the micro power pump station 12 ≥ 200m 3 / h. Since the blast furnace is in the intermediate relining period of shutdown, there is no newly generated heat generated during smelting in the hearth. The microcirculation water cooling system formed by the micro power pump station 12, the water supply pipes 10, the cooling water pipes and the water return pipes 11 only needs to cool the residual heat of the residual slag and iron in the hearth after the blast furnace is shut down. Therefore, the water volume requirement is very small. The water supply capacity of the micro power pump for a single cooling unit only needs to be ≥ 50m 3 / h, and the total water supply capacity of the micro power pump for all cooling units ≥ 200m 3 / h. To reduce the equipment volume and floor area, the micro power pump selects the equipment specification model close to the lower limit value as much as possible on the premise of meeting the water supply capacity.

[0033] Furthermore, since the height of the highest position of the hearths cooling staves in the blast furnace area is less than 16m, ordinary pumps can meet the lift requirements. Therefore, the micro power pump station 12 can be arranged on the platform of the blast furnace tapping yard, or arranged under the blast furnace hearth and in the area irrelevant to the intermediate relining construction of the blast furnace, so as to ensure the smooth progress of the intermediate relining of the blast furnace.

[0034] The present invention also discloses an implementation method for water cooling of the hearths cooling staves in the blast furnace during the intermediate relining, which uses the above water cooling device. As Figure 2As shown in the figure, the implementation method includes the following steps:

[0035] S1, partition the hearth cooling stave: When the blast furnace is shut down, based on the principle of evenly dividing the circumference of the hearth cross-section, the hearth cooling staves that do not need to be repaired during the medium repair of the blast furnace are divided into four cooling units circumferentially. Within one cooling unit, from one side of the cooling unit to the other side, there are the 1st cooling water pipe, the 2nd cooling water pipe 2, the 3rd cooling water pipe 3,..., the nth cooling water inlet pipe in sequence;

[0036] S2, connect the cooling water pipes within the cooling unit: After the blast furnace is shut down for medium repair, disconnect the lower and upper ends of the cooling water pipes from the cooling wall water inlet system respectively. Take the 1st cooling water pipe as the unit inlet pipe 1, connect the lower end of the unit inlet pipe 1 to the water supply pipe 10 of the micro-power pump station 12, take the nth cooling water pipe as the unit outlet pipe 7, connect the lower end of the unit outlet pipe 7 to the water return pipe 11 of the micro-power pump station 12, and connect the 1st cooling water pipe, other cooling water pipes within the cooling unit, and the nth cooling water pipe in sequence end to end to form a path for cooling water circulation;

[0037] When connecting the cooling water pipes within the cooling unit, connect the lower ends of the 2nd cooling water pipe 2 and the 3rd cooling water pipe 3 with a metal hose 4, connect the lower ends of the 4th cooling water pipe 5 and the 5th cooling water pipe 6 with a metal hose 4,..., connect the lower ends of the n - 2nd cooling water pipe and the n - 1st cooling water pipe with a metal hose 4. Connect the upper end of the unit inlet pipe 1 and the upper end of the 2nd cooling water pipe 2 with a metal hose 4, connect the upper ends of the 3rd cooling water pipe 3 and the 4th cooling water pipe 5 with a metal hose 4,..., connect the upper end of the n - 1st cooling water pipe and the upper end of the unit outlet pipe 7 with a metal hose 4.

[0038] When the total number of all cooling water pipes within the cooling unit is an even number, take the 1st cooling water pipe as the unit inlet pipe 1 and the last 1st cooling water pipe as the unit outlet pipe 7. When the total number of all cooling water pipes within the cooling unit is an odd number, the last 1st cooling water pipe is carried over to the next cooling unit, and the penultimate 2nd cooling water pipe is used as the unit outlet pipe 7.

[0039] If there are cooling water pipes (jumping pipes 9) in the lower cooling stave (the 4th cooling stave) of the highest - level cooling stave that reach the height of the high - level cooling stave with a gap, the jumping cooling water pipes are connected to the upper ends of the adjacent cooling water pipes in the order of their numbers. After all the cooling water pipes within the unit are paired and connected, then connect the water supply pipe 10 of the micro - power pump station 12 to the unit inlet pipe 1, and connect the unit outlet pipe 7 to the water return pipe 11 of the micro - power pump. At this time, an independent micro - circulation water cooling system for the cooling staves in the hearth area has been built.

[0040] In an embodiment of the present invention, as Figure 1 shown, the first cooling water pipe serves as the unit inlet water pipe 1. The lower ends of the second cooling water pipe 2 and the third cooling water pipe 3 are connected by a metal hose 4. The lower ends of the fourth cooling water pipe 5 and the fifth cooling water pipe 6 are connected by a metal hose 4,... The lower ends of the (n - 2)th cooling water pipe and the (n - 1)th cooling water pipe are connected by a metal hose 4. The upper end of the unit inlet water pipe 1 and the upper end of the second cooling water pipe 2 are connected by a metal hose 4,... The upper end of the sixth cooling water pipe 8 and the upper end of the jump pipe 9 are connected by a metal hose 4,... The upper end of the (n - 1)th cooling water pipe and the upper end of the unit outlet water pipe 7 are connected by a metal hose 4. The unit inlet water pipe 1 is connected to the micro-power pump station 12 through a water supply pipe 10, and the unit outlet water pipe 7 is connected to the micro-power pump station 12 through a water return pipe 11.

[0041] S3. Water supply and cooling: Start the micro-power pump station 12 to supply water to achieve the cooling of the blast furnace hearth cooling stave.

[0042] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0043] 1. The overall implementation of this cooling device is simple and the manufacturing cost is low. Before the intermediate repair of the blast furnace hearth cooling stave, there is no need to manufacture a water circuit ring pipe, and only the metal hose 4 needs to be prepared.

[0044] 2. During the intermediate repair of the blast furnace, the cooling staves in the hearth area will not affect the normal replacement or repair operations of the cooling staves in other areas, nor will it affect the equipment repair in the blast furnace water pump house and the replacement of various types of water pipes in the circulating water system, improving the maintenance quality of the blast furnace intermediate repair.

[0045] 3. During the intermediate repair of the blast furnace, the cooling staves in the hearth area are always in the cooling mode protection, eliminating the damage of thermal stress to the blast furnace hearth cooling stave, furnace shell and steel structure, and extending the service life of the blast furnace cooling stave and the hearth refractories.

[0046] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A water cooling device for a blast furnace hearth cooling wall during maintenance, wherein a plurality of cooling water pipes are arranged in the hearth cooling wall and along the circumference of the hearth cooling wall, characterized in that: The cooling device includes a plurality of cooling units and a micro-power water pump station, wherein: A plurality of the cooling units are sequentially connected and enclosed to form a furnace cooling wall; One of the cooling water pipes in the cooling unit is a unit water inlet pipe, and one of the cooling water pipes is a unit water outlet pipe. The unit water inlet pipe, the other cooling water pipes and the unit water outlet pipe are connected end to end in sequence to form a passage for cooling water circulation; The unit water inlet pipe is connected to the water supply pipe of the micro-power water pump station, and the unit water outlet pipe is connected to the return pipe of the micro-power water pump station.

2. The blast furnace hearth cooling wall water cooling device during the maintenance period according to claim 1 is characterized in that: The furnace cooling wall includes four layers of cooling walls, which are the bottom cooling wall, the second cooling wall, the third cooling wall, the fourth cooling wall and the highest cooling wall in sequence. A plurality of cooling water sub-pipes are vertically arranged in each layer of the cooling wall. The corresponding two cooling water sub-pipes in two adjacent layers of the cooling walls are connected to each other, and the multiple cooling water sub-pipes in the multiple layers of cooling walls are connected in sequence to form the cooling water pipe.

3. The water cooling device for the blast furnace hearth cooling wall during the maintenance period according to claim 1, characterized in that: There are four cooling units, and the micro-power water pump station provides cooling water to the four cooling units respectively through four water supply pipes and four water return pipes.

4. The blast furnace hearth cooling wall water cooling device during the maintenance period according to claim 1, characterized in that: The number of cooling water pipes in one cooling unit is an even number, and the cooling water pipes are sequentially the first cooling water pipe, the second cooling water pipe, the third cooling water pipe, ..., the nth cooling water pipe from one side to the other side of the cooling unit, wherein the first cooling water pipe is the unit water inlet pipe, and the nth cooling water pipe is the unit water outlet pipe; The unit water inlet pipe, the other cooling water pipes and the unit water outlet pipe are all connected by a metal hose.

5. The blast furnace hearth cooling wall water cooling device during the maintenance period according to claim 1, characterized in that: The water supply capacity of the micro-power water pump station to a single cooling unit is ≥ 50m 3 / h, the total water supply capacity of the micro-power water pump station is ≥200m 3 / h.

6. The water cooling device for the blast furnace hearth cooling wall during the maintenance period according to claim 1, characterized in that: The micro-power water pump station is arranged on the platform of the blast furnace iron-making yard, or arranged below the blast furnace foundation.

7. A method for water cooling of a blast furnace hearth cooling wall during maintenance, using the water cooling device according to any one of claims 1 to 6, characterized in that: The steps include: S1, partition the furnace cooling staves: divide the furnace cooling staves that do not need to be repaired during the blast furnace overhaul into four cooling units in the circumferential direction. In one cooling unit, from one side of the cooling unit to the other side, there are the first cooling water pipe, the second cooling water pipe, the third cooling water pipe, ..., the nth cooling water inlet pipe; S2, connecting cooling water pipes in the cooling unit: disconnect the lower end and the upper end of the cooling water pipe from the cooling wall water inlet system respectively, use the first cooling water pipe as the unit water inlet pipe, connect the lower end of the unit water inlet pipe to the water supply pipe of the micro-power water pump station, use the nth cooling water pipe as the unit water outlet pipe, connect the lower end of the unit water outlet pipe to the return pipe of the micro-power water pump station, and the first cooling water pipe, other cooling water pipes in the cooling unit and the nth cooling water pipe are connected in sequence to form a passage for cooling water circulation; S3, water supply cooling: start the micro-power water pump station to supply water to cool the furnace cooling wall.

8. The method for implementing water cooling of the blast furnace hearth cooling stave during the mid-term maintenance period according to claim 7, characterized in that: In step S2, the lower end of the second cooling water pipe is connected to the lower end of the third cooling water pipe by a metal hose, the lower end of the fourth cooling water pipe is connected to the lower end of the fifth cooling water pipe by a metal hose, ..., the lower end of the n-2 cooling water pipe is connected to the lower end of the n-1 cooling water pipe by a metal hose, The upper end of the unit water inlet pipe and the upper end of the second cooling water pipe are connected with a metal hose, the upper end of the third cooling water pipe and the upper end of the fourth cooling water pipe are connected with a metal hose, ..., the upper end of the n-1th cooling water pipe and the upper end of the unit water outlet pipe are connected with a metal hose.

9. The method for implementing water cooling of the blast furnace hearth cooling stave during the mid-term maintenance period according to claim 8, characterized in that: In step S2, if there is a cooling water pipe in the lower cooling wall of the highest cooling wall that is gapped to reach the height of the upper cooling wall, the gapped cooling water pipe is connected to the upper end of the adjacent cooling water pipe according to the number.

10. The method for implementing water cooling of the blast furnace hearth cooling stave during the mid-term maintenance period according to claim 7, characterized in that: In step S2, when the total number of cooling water pipes in the cooling unit is an even number, the last cooling water pipe is used as the unit outlet pipe. When the total number of all cooling water pipes in the cooling unit is an odd number, the last cooling water pipe is distributed to the next cooling unit, and the second to last cooling water pipe serves as the unit outlet pipe.

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