A blast furnace lining forced cooling device

Abstract

A kind of blast furnace lining forced cooling device, including cooling wall, cooling wall is arranged between blast furnace shell and lining, the cooling wall is welded by upper cylinder, middle cylinder and lower cylinder, the inner side surface of cooling wall is adapted with the outer surface of blast furnace lining.Spray cooling is implemented to cooling wall by a circle of spray head that is arranged obliquely in the lower side of circular ring water pipe, cooling water can quickly flow down the outer surface of entire cooling wall, to implement forced cooling operation to blast furnace lining;The outer side surface of cooling wall is equipped with staggered flow guide plate, can make cooling water quickly and evenly flow through the outer surface of cooling wall;The outer side surface of cooling wall is equipped with temperature sensor that is uniformly arranged in position, the temperature of blast furnace lining can be detected in real time by temperature sensor when some local position of blast furnace lining is larger, when heat load, the spray head above this heating position can be opened alone to carry out local cooling operation, improve the dynamic adjustment cooling effect of cooling wall.

Description

Technical Field

[0001] This utility model belongs to the technical field of blast furnace equipment, specifically relating to a forced cooling device for blast furnace lining. Background Technology

[0002] As the core equipment in steel smelting, the blast furnace lining is subjected to chemical erosion and thermal stress from high-temperature molten iron and slag for a long time, which can easily lead to thinning of the lining, loosening of the structure, or even spalling, directly affecting the service life of the blast furnace and production safety.

[0003] Currently, blast furnace lining cooling mainly relies on a cooling wall + soft water circulation system. Cooling water is circulated through copper or cast iron pipes embedded in the cooling wall to remove heat. However, this technology has the following drawbacks: 1. The existence of air gaps or refractory material layers between the cooling wall and the lining leads to low heat transfer efficiency and the formation of hot spots in localized areas; 2. The heat load varies significantly in different parts of the blast furnace (such as the hearth, belly, and shaft), making it difficult to dynamically adjust the cooling intensity with a fixed cooling wall; 3. Cooling water pipes are prone to leakage due to scale buildup or mechanical wear, requiring furnace shutdown for maintenance and affecting production continuity. Therefore, designing a forced cooling device for the blast furnace lining has become a pressing technical problem to be solved. Utility Model Content

[0004] This invention provides a forced cooling device for blast furnace lining. A ring of nozzles, angled downwards on the lower side of a circular water pipe, sprays cooling water onto the cooling wall, allowing the cooling water to flow rapidly downwards across the entire outer surface of the cooling wall, thus providing forced cooling. The outer surface of the cooling wall is equipped with staggered guide plates, ensuring the cooling water flows quickly and evenly across the surface. Temperature sensors, evenly distributed on the outer surface of the cooling wall, can monitor the overall temperature of the blast furnace lining in real time. When a specific area of ​​the blast furnace lining experiences a high heat load, the nozzle above that area can be individually activated for localized cooling, improving the dynamic cooling effect of the cooling wall.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A forced cooling device for blast furnace lining includes a cooling wall disposed between the blast furnace shell and the lining. The cooling wall is welded together from an upper cylinder, a middle cylinder, and a lower cylinder. The inner surface of the cooling wall is adapted to the outer surface of the blast furnace lining. A protective cover extending horizontally outward is provided at the top of the cooling wall. A circular water pipe is provided on the lower side of the protective cover. A water inlet pipe is provided on the side of the circular water pipe. An inclined ring of nozzles is provided on the lower side of the circular water pipe. Support legs are provided at the bottom of the cooling wall. A water collection trough is also provided at the bottom edge of the cooling wall, and a drainage pipe is provided in the water collection trough.

[0007] The outer surface of the cooling wall is provided with several guide plates, which are arranged alternately.

[0008] Several temperature sensors are provided on the outer surface of the cooling wall.

[0009] A booster pump is installed on the water inlet pipe.

[0010] Each nozzle of the circular water pipe is equipped with a high-temperature electric valve.

[0011] The inner surface of the cooling wall is also provided with a temperature conduction layer, which is a copper-structured temperature conduction layer.

[0012] A water level sensor is installed on the upper inner edge of the water collection tank of the cooling wall.

[0013] A water pump is installed on the drainage pipe of the water collection tank.

[0014] The beneficial effects of this utility model, achieved by adopting the above technical solution, are as follows: The inlet pipe of the annular water pipe is connected to an external water source, and a ring of nozzles inclined at the lower side of the annular water pipe sprays the cooling wall for cooling. The cooling water can quickly flow downwards over the entire outer surface of the cooling wall, thereby performing forced cooling of the blast furnace lining; the outer surface of the cooling wall is provided with staggered guide plates, which can allow the cooling water to flow quickly and evenly over the outer surface of the cooling wall, improving the cooling effect; the outer surface of the cooling wall is provided with temperature sensors evenly distributed, which can detect the overall temperature of the blast furnace lining in real time. When a certain part of the blast furnace lining... When the heat load at a location is high, the nozzles above that location can be opened individually for localized cooling, improving the dynamic cooling effect of the cooling wall. Cooling water is collected downwards into a water collection tank and discharged through a drainage pipe. A water level sensor is installed on the upper inner edge of the water collection tank. When the water level is triggered, the controller stops the nozzles of the circular water pipe from spraying water and simultaneously starts the water pump on the drainage pipe to accelerate the drainage of water from the water collection tank, preventing cooling water from overflowing and damaging the blast furnace. The inner surface of the cooling wall is also equipped with a copper-structured temperature conduction layer, which provides good heat conduction between the cooling wall and the blast furnace lining, resulting in a good cooling effect. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0016] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0017] Figure 3 This is a schematic diagram of the circular water pipe and protective cover in this utility model.

[0018] Cooling wall 1, protective cover 2, circular water pipe 3, water inlet pipe 4, nozzle 5, support leg 6, water collection tank 7, drainage pipe 8, guide plate 9, temperature sensor 10, water level sensor 11. Detailed Implementation

[0019] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0021] like Figures 1-3 As shown, a forced cooling device for blast furnace lining includes a cooling wall 1, which is disposed between the blast furnace shell and the lining. The cooling wall 1 is welded together from an upper cylinder, a middle cylinder, and a lower cylinder. The inner surface of the cooling wall 1 is adapted to the outer surface of the blast furnace lining. The top of the cooling wall 1 is provided with a protective cover 2 extending horizontally outward. The lower side of the protective cover 2 is provided with a circular water pipe 3. The side of the circular water pipe 3 is provided with a water inlet pipe 4. The lower side of the circular water pipe 3 is provided with an inclined ring of nozzles 5. The bottom of the cooling wall 1 is provided with a support leg 6. The bottom edge of the cooling wall 1 is also provided with a water collection trough 7, and the water collection trough 7 is provided with a drainage pipe 8.

[0022] The outer surface of the cooling wall 1 is provided with several guide plates 9, which are arranged alternately.

[0023] Several temperature sensors 10 are provided on the outer surface of the cooling wall 1.

[0024] A booster pump is installed on the water inlet pipe 4.

[0025] Each nozzle 5 of the circular water pipe 3 is equipped with a high-temperature electric valve.

[0026] The inner surface of the cooling wall 1 is also provided with a temperature conduction layer, which is a copper-structured temperature conduction layer.

[0027] A water level sensor 11 is provided on the upper inner edge of the water collection tank 7 of the cooling wall 1.

[0028] A water pump is installed on the drainage pipe 8 of the water collection tank 7. Example

[0029] In use, a cooling wall 1, welded from an upper cylinder, a middle cylinder, and a lower cylinder, is placed between the blast furnace shell and the furnace lining to ensure that the inner copper temperature conduction layer is in contact with the outer surface of the furnace lining. A circular water pipe 3 is installed on the lower side of the protective cover 2, connected to a water inlet pipe 4 and equipped with a pressure pump. Each nozzle 5 is equipped with a high-temperature electric valve, and the nozzle 5 is tilted at an angle. Several guide plates 9 are staggered on the outside of the cooling wall 1, and temperature sensors 10 are evenly distributed on the outside of the cooling wall 1. A water level sensor 11 is installed inside the water collection tank 7, with a trigger threshold of 80% of the tank depth.

[0030] Water is supplied through the inlet pipe 4, and the nozzles 5 are fully open to implement basic cooling. The cooling water is evenly covered by the cooling wall 1 through the guide plate 9 to implement forced cooling of the blast furnace lining.

[0031] When the temperature sensor 10 detects that the local temperature of the furnace lining exceeds 400°C, the controller opens the high-temperature electric valve to implement directional spraying in the area. If the temperature continues to rise to 450°C, it triggers overpressure spraying and starts the emergency sealing procedure at the taphole.

[0032] When the water level sensor 11 detects that the water level in the water collection tank 7 reaches 80%, the controller controls all nozzles 5 to close and starts the water pump in the drainage pipe 8 to transport cooling water to the circulating water pool. After the water level is qualified, it is re-injected into the circular water pipe 3 to achieve a water utilization rate of over 95%.

[0033] The system employs a safety redundancy design. When the furnace lining temperature is below 400°C, it uses conventional cooling. When the furnace lining temperature exceeds 400°C, it automatically increases the flow rate to prevent hot spots. When the furnace lining temperature exceeds 430°C, it activates high-pressure spraying to control thermal shock damage. When the furnace lining temperature exceeds 450°C, it triggers overpressure spraying and taphole sealing to ensure that molten iron penetration is blocked within 10 minutes.

[0034] The controller, temperature sensor 10, high-temperature electric valve, pressure pump, water level sensor 11, and water pump used in this utility model are all existing conventional technologies, and their structural features will not be described in detail.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A forced cooling device for blast furnace lining, comprising a cooling wall disposed between the blast furnace shell and the furnace lining, characterized in that: The cooling wall is welded together from an upper cylinder, a middle cylinder, and a lower cylinder. The inner surface of the cooling wall is adapted to the outer surface of the blast furnace lining. The top of the cooling wall is provided with a protective cover that extends horizontally outward. A circular water pipe is provided on the lower side of the protective cover. A water inlet pipe is provided on the side of the circular water pipe. A ring of nozzles is provided on the lower side of the circular water pipe. The bottom of the cooling wall is provided with support legs. A water collection trough is also provided on the bottom edge of the cooling wall. The water collection trough is provided with a drainage pipe.

2. The forced cooling device for blast furnace lining according to claim 1, characterized in that: The outer surface of the cooling wall is provided with several guide plates, which are arranged alternately.

3. The forced cooling device for blast furnace lining according to claim 2, characterized in that: Several temperature sensors are provided on the outer surface of the cooling wall.

4. A forced cooling device for blast furnace lining according to claim 3, characterized in that: A booster pump is installed on the water inlet pipe.

5. A forced cooling device for blast furnace lining according to claim 4, characterized in that: Each nozzle of the circular water pipe is equipped with a high-temperature electric valve.

6. A forced cooling device for blast furnace lining according to claim 5, characterized in that: The inner surface of the cooling wall is also provided with a temperature conduction layer, which is a copper-structured temperature conduction layer.

7. A forced cooling device for blast furnace lining according to claim 6, characterized in that: A water level sensor is installed on the upper inner edge of the water collection tank of the cooling wall.

8. A forced cooling device for blast furnace lining according to claim 7, characterized in that: A water pump is installed on the drainage pipe of the water collection tank.

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