Intelligent main channel cooling and ventilating system for blast furnace casting house

Abstract

The utility model discloses an intelligent main channel cooling and ventilating system for a blast furnace casting house, which belongs to the field of steel smelting and comprises an air inlet, an air cooling layer, a ventilating slot, an air gathering device, a cooling device and an air outlet. The air cooling layer is arranged between the tapping channel steel structure and the protective layer; the air inlet is formed in the bottom of the protection layer, and the air gathering device communicates with the air cooling layer through the ventilation groove; external air enters the air cooling layer from the air inlet and then flows into the ventilation groove, and high-speed airflow is formed to achieve air cooling of the tapping channel. According to the utility model, a drainage route formed by the wind gathering device, the adsorption fans connected in parallel and the ventilation pipes is adopted, a large amount of airflow can be respectively guided into the corresponding ventilation pipes through the adsorption fans connected in parallel, the air pressure of the pipelines can be reduced, and the operation stability and safety of the whole system are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of steel smelting, especially relates to a blast furnace casthouse intelligent main ditch cooling ventilation system. BACKGROUND

[0002] With the high-speed development of industrialization, the blast furnace iron runner as a part of blast furnace production is the necessary passage for molten iron flowing from the furnace to the molten iron tank through the iron notch, and the extension of the iron passing time and the shortening of the iron tapping interval time put forward more stringent requirements on the quality and service life of the blast furnace iron runner. Therefore, the service life of the iron runner is directly related to whether the blast furnace production can be carried out normally and orderly. The periodic production process of the blast furnace causes the iron runner to be subjected to severe temperature changes, and the steel structure will crack and deform under long-term thermal shock, thereby causing the oxidation of refractory materials and seriously affecting the stable operation and service life of the iron runner, and even affecting the operation of the entire blast furnace.

[0003] In order to better protect the steel structure and avoid deformation and cracking during use, the cooling method of the current common iron runner is to set a cooling channel at the bottom of the iron runner, and cooling is carried out by passing in cold air or cold water. Due to the different depths of the iron runner and the uneven distribution of iron slag and molten iron in the ditch, it is impossible to directly use unified water cooling for cooling. If the same water cooling is used, cold iron phenomenon will occur at some positions due to too low temperature, and some positions cannot be well cooled due to too high temperature to protect the iron runner. And the traditional method of passing in cold air to cool the bottom of the iron runner is difficult to realize uniform heat exchange, and the exhaust hot air flow will cause the surrounding environment temperature to rise, which is not conducive to long-term operation.

[0004] Therefore, a blast furnace casthouse main ditch cooling ventilation system is proposed, which can realize timely and uniform cooling of the blast furnace casthouse main ditch and maintain the stability of the surrounding environment. UTILITY MODEL CONTENTS

[0005] In order to solve the problems in the background art, the purpose of the utility model is to propose a blast furnace casthouse intelligent main ditch cooling ventilation system, which uses air cooling heat exchange technology to cool and exchange heat of the blast furnace casthouse main ditch, and realizes timely cooling of the blast furnace casthouse main ditch.

[0006] In order to solve the above technical problems, the utility model adopts the following technical scheme:

[0007] The utility model provides a blast furnace casthouse intelligent main ditch cooling ventilation system, its characterized in being including air inlet, air cooling layer, ventilation groove, wind gathering device, cooling device and air outlet, air cooling layer sets up between the protection layer and the casthouse steel structure, air inlet sets up at the bottom of protection layer, and wind gathering device communicates with air cooling layer through ventilation groove, and external air enters air cooling layer from air inlet, and then surges into ventilation groove, forms high speed airflow and realizes the air cooling cooling of casthouse steel structure.

[0008] Further, the bottom end of the protection layer is provided with two left-right symmetrical air inlets, the depth of the air inlets is equal to the thickness of the protection layer, and the length of the air inlets is equal to the length of the casthouse steel structure.

[0009] Further, the casthouse steel structure is arranged inside the protection layer.

[0010] Further, the protection layer is provided with ventilation grooves opening downward at the same height at the left and right ends.

[0011] Further, the wind gathering device is arranged at the end of the left-right symmetrical ventilation grooves.

[0012] Further, the wind gathering device is provided with a wind gathering pipe and a ventilation pipe.

[0013] Further, the ventilation pipe is provided with a valve.

[0014] Further, the end of the ventilation pipe is provided with an air outlet, and the upper end of the air outlet is provided with a cooling device.

[0015] Further, the bottom end of the cooling device is provided with a cooling liquid inlet, the cooling liquid inlet is provided with a valve a, the top end of the cooling device is provided with a cooling liquid outlet, and the cooling liquid outlet is provided with a valve b.

[0016] Compared with the prior art, the utility model has the following advantages:

[0017] (1) The utility model uses air cooling heat exchange technology to cool the blast furnace casthouse main ditch, effectively realizes timely cooling of the blast furnace casthouse main ditch, and reduces the cost of system operation.

[0018] (2) The utility model uses the wind gathering device, a plurality of parallel adsorption fans and a ventilation pipe to form a drainage route, a large amount of airflow can be guided into the corresponding ventilation pipe through the plurality of parallel adsorption fans, the air pressure of the pipeline can be reduced, and the stability and safety of the whole system operation can be improved.

[0019] (3) The utility model discloses a corresponding valve is arranged on each group of ventilation pipe, when the adsorption fan overload operation, can pass through the regulation and control of valve, reduce or close the ventilation pipe, and the airflow is guided into other parallel ventilation pipe, and then under the premise of guaranteeing the normal operation of whole system, the corresponding adsorption fan can be realized dismantling and replacement.

[0020] (4) The utility model discloses a cooling device is equipped with in ventilation pipe terminal, carries out the cooling of the hot airflow with a large amount of heat after air cooling heat exchange, until the discharge environment when reducing for room temperature, maintains the stability of surrounding temperature. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is whole structure schematic diagram of the utility model;

[0022] Figure 2 It is ventilation system structure schematic diagram of the utility model;

[0023] Figure 3 It is the transverse section schematic diagram of the utility model wind gathering device.

[0024] The figure mark is: 1, protective layer;2, iron ditch steel structure;3, ventilation groove;4, air cooling layer;5, wind gathering device;6, ventilation pipe;7, adsorption fan;8, air inlet;9, cooling device;10, valve a;11, cooling liquid inlet;12, air outlet;13, valve b;14, cooling liquid outlet;501, first wind gathering pipe;502, second wind gathering pipe;503, third wind gathering pipe;504, fourth wind gathering pipe;601, first ventilation pipe;602, second ventilation pipe;603, third ventilation pipe;604, fourth ventilation pipe;701, first adsorption fan;702, second adsorption fan;703, third adsorption fan;704, fourth adsorption fan. DETAILED DESCRIPTION

[0025] The utility model will be further illustrated in combination with specific implementation examples, and the examples are implemented under the premise of the technical scheme of the utility model, and it should be understood that these examples are only used for illustrating the utility model and are not used for limiting the scope of the utility model.

[0026] Please refer to the attached Figures 1-3 A blast furnace casthouse intelligent main ditch cooling ventilation system, including protective layer 1, iron ditch steel structure 2, air inlet 8, air cooling layer 4, wind gathering device 5, cooling device 9 and air outlet 12;Iron ditch steel structure 2 is arranged in the inside of protective layer 1, and air cooling layer 4 is arranged between iron ditch steel structure 2 and protective layer 1;The bottom of protective layer 1 is equipped with air inlet 8, and the side of protective layer 1 is equipped with ventilation groove 3, and the tail end of ventilation groove 3 is equipped with wind gathering device 5, and the outside air enters air cooling layer 4 from air inlet 8, and reaches ventilation groove 3 along air cooling layer 4, forms the airflow with fast flow rate, realizes the air cooling of iron ditch steel structure 2.

[0027] The protective layer 1 is made of a material with high refractoriness, good slag resistance and wear resistance, which can be selected from one or more of heat-resistant concrete and refractory castable. The bottom end of the protective layer 1 is provided with two left-right symmetrical air inlets 8, and the depth of the air inlet 8 is equal to the thickness of the iron runner protective layer 1. The iron runner steel structure 2 is arranged inside the protective layer 1, and the left and right top ends of the iron runner steel structure 2 are fixedly arranged on the protective layer 1, which can effectively improve the stability of the iron runner steel structure 2. The left and right ends of the protective layer 1 are provided with ventilation grooves 3 opening downward at the same height, and the width of the ventilation groove 3 is equal to the length of the iron runner steel structure 2.

[0028] The iron runner steel structure 2 is a steel material layer, and the inside is a refractory castable. The air-cooled layer 4 with uniform spacing is arranged between the iron runner steel structure 2 and the protective layer 1, and the air-cooled layer 4 serves as a gas flow space and fills the outer surface of the entire iron runner steel structure 2 to achieve uniform cooling of the iron runner steel structure 2 by flowing air.

[0029] The wind collecting device 5 is arranged at the end of the left-right symmetrical ventilation groove 3, and the left wind collecting device 5 is taken as an example. The wind collecting device 5 is provided with a first wind collecting pipe 501, a second wind collecting pipe 502, a third wind collecting pipe 503 and a fourth wind collecting pipe 504, each of which is a quadrangular frustum (corresponding to a trapezoid in Figure 1 The bottom of the first wind collecting pipe 501 is provided with a first ventilation pipe 601, the bottom of the second wind collecting pipe 502 is provided with a second ventilation pipe 602, the bottom of the third wind collecting pipe 503 is provided with a third ventilation pipe 603, and the bottom of the fourth wind collecting pipe 504 is provided with a fourth ventilation pipe 604. The first ventilation pipe 601 is provided with a first suction fan 701, the second ventilation pipe 602 is provided with a second suction fan 702, the third ventilation pipe 603 is provided with a third suction fan 703, and the fourth ventilation pipe 604 is provided with a fourth suction fan 704. Valves are arranged on the first ventilation pipe 601, the second ventilation pipe 602, the third ventilation pipe 603 and the fourth ventilation pipe 604. By opening and closing the valves, it can be controlled whether the air flow from the ventilation groove 3 into the wind collecting device 5 will pass through the corresponding wind collecting pipe and the corresponding ventilation pipe 6 to reach the corresponding suction fan 7, so as to protect the suction fan 7, avoid overloading of the suction fan 7, and reduce the failure rate of the equipment.

[0030] The first ventilation pipe 601, the second ventilation pipe 602, the third ventilation pipe 603 and the fourth ventilation pipe 604 located at the lower end of the corresponding adsorption fan 7 are combined into the same pipeline, a horizontal ventilation pipe 6 is formed in the horizontal direction, the left and right symmetrical horizontal ventilation pipes 6 are combined into the same pipeline again at the center, and finally a single-pipe ventilation pipe 6 extending downward is formed. The end of the ventilation pipe 6 is provided with an air outlet 12, the upper end of the air outlet 12 is provided with a cooling device 9, the bottom end of the cooling device 9 is provided with a cooling liquid inlet 11, the cooling liquid inlet 11 is provided with a valve a 10, the top end of the cooling device 9 is provided with a cooling liquid outlet 14, and the cooling liquid outlet 14 is provided with a valve b 13. The airflow with heat in the ventilation pipe 6 is cooled by the cooling device 9, and then discharged into the environment through the air outlet 12, so that the temperature of the surrounding environment is stable.

[0031] The working principle of the utility model is as follows: when the system is running, first open the valve a 10 and the valve b 13, and guide the cooling liquid into the cooling device 9 from the cooling liquid inlet 11. Then start the adsorption fan 7, and the external air of the system will rapidly enter the air cooling layer 4 from the air inlet 8. In the air cooling layer 4, the rapidly flowing airflow will directly contact the iron ditch steel structure 2 along the air cooling layer 4, quickly take away the heat, and realize uniform cooling. With the continuous work of the adsorption fan 7, the airflow absorbing heat will reach the ventilation groove 3 upwards, and then enter the air collecting device 5. In the air collecting device 5, a large amount of airflow carrying heat will enter the corresponding ventilation pipe 6 through different air collecting pipes. After cooling and heat exchange of the cooling device 9 on the ventilation pipe 6, the temperature of the hot airflow will rapidly decrease, and then it will be discharged from the air outlet 12 after reaching normal temperature, so as to realize the circulation of air cooling and heat exchange.

[0032] With the progress of the reaction, part of the adsorption fan 7 (the first adsorption fan 701, the second adsorption fan 702, the third adsorption fan 703 or the fourth adsorption fan 704) may need to be replaced and maintained or cooled and stopped due to long-term overload operation. At this time, by adjusting the valve on the corresponding ventilation pipe 6 (the first ventilation pipe 601, the second ventilation pipe 602, the third ventilation pipe 603 and the fourth ventilation pipe 604), the airflow can be guided into other parallel ventilation pipes 6, so that the corresponding adsorption fan 7 can be disassembled and replaced under the premise of ensuring the normal operation of the whole system.

[0033] The above only describes the preferred embodiments of the utility model and is not used to limit the utility model, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A blast furnace casthouse intelligent main channel cooling ventilation system, characterized in that, It includes air inlet (8), air cooling layer (4), ventilation groove (3), wind gathering device (5), cooling device (9) and air outlet (12); the air cooling layer (4) is arranged between the iron notch steel structure (2) and the protection layer (1); the air inlet (8) is arranged at the bottom of the protection layer (1), the wind gathering device (5) is communicated with the air cooling layer (4) through the ventilation groove (3); the external air enters the air cooling layer (4) from the air inlet (8), then flows into the ventilation groove (3), forms high-speed airflow and realizes air cooling of the iron notch steel structure (2).

2. The intelligent main channel cooling and ventilation system for the blast furnace casthouse according to claim 1, characterized in that, The bottom end of the protection layer (1) is provided with two air inlets (8) which are symmetrical left and right, the depth of the air inlet (8) is equal to the thickness of the protection layer (1), and the length of the air inlet (8) is equal to the length of the iron notch steel structure (2).

3. The intelligent main channel cooling and ventilation system for the blast furnace casthouse according to claim 1, characterized in that, The iron notch steel structure (2) is arranged in the protection layer (1).

4. The intelligent main channel cooling and ventilation system for the blast furnace casthouse according to claim 1, characterized in that, The protection layer (1) is provided with ventilation grooves (3) which are open downward at the same height at the left and right ends of the protection layer (1), and the width of the ventilation groove (3) is equal to the length of the iron notch steel structure (2).

5. The intelligent main channel cooling and ventilation system for the blast furnace casthouse according to claim 1, characterized in that, The wind gathering device (5) is arranged at the end of the ventilation groove (3) which is symmetrical left and right.

6. The intelligent main channel cooling and ventilation system for the blast furnace casthouse according to claim 1, characterized in that, The wind gathering device (5) is provided with a wind gathering pipe and a ventilation pipe (6).

7. The intelligent main channel cooling and ventilation system for the blast furnace casthouse according to claim 6, characterized in that, The ventilation pipe (6) is provided with a valve.

8. The intelligent main channel cooling and ventilation system for the blast furnace casthouse according to claim 6, characterized in that, The ventilation pipe (6) is provided with an air outlet (12) at the end, and the air outlet (12) is provided with a cooling device (9) at the upper end.

9. The intelligent main channel cooling and ventilation system for the blast furnace casthouse according to claim 8, characterized in that, The cooling device (9) is provided with a cooling liquid inlet (11) at the bottom end, the cooling liquid inlet (11) is provided with a valve a (10), the cooling device (9) is provided with a cooling liquid outlet (14) at the top end, and the cooling liquid outlet (14) is provided with a valve b (13).

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