Application of cold-walled spring furnace body in curing coke oven
Hanging furnace door. The position roller is set in the up and down direction of the furnace door, and the guiding device is arranged in the left and right direction to prevent the furnace door from being skewed. During the design, there is a gap of 25mm between the bottom of the furnace door and the grinding plate. At the 2/3 of the furnace door, 100mm rollers are installed on both sides. When the door is on the door, it is hung on the brackets on both sides of the furnace door frame. The full weight of the door.
The spring door bolts the door. The spring door bolt structure of the spring furnace door combination makes the spring force of each door bolt: the upper door bolt 105kN, the lower door bolt 145kN, the small edge spring of the knife edge pressing seat is deformed to 5mm, and the spring knife edge is fixed to the mirror frame of the furnace door frame. Sufficient pressure to seal the oven door.
A pressure spring seat is used on the side of the furnace door. Through the improvement of the following structure of the furnace door: the connecting web of the knife edge is only 1.5mm thick, and the elasticity is excellent. It can be made of stainless steel for crack resistance and corrosion resistance. 2 The small wire of the top edge of the knife edge is arranged, and one side is arranged along the edge of the knife edge at intervals of 250 to 270 mm, so that the blade edge is evenly stressed. A total of 42 pressers are placed in the side of the knife, each with a capacity of 0.225t. 3 Increase the pressure of the top pressure on the turning edge of the four corners of the furnace door so that each is 0.45t, so that the adjustment force to the four corners can be strengthened.
It can adapt to the thermal expansion deformation of the coke oven body, and ensure that the door picking machine can realize the automatic control of the door of the PLC. In the production state, the coke oven body expands along the length and height of the coke oven every year. The well-managed enterprise is extended by 1 to 3 mm per year, and the general enterprise is about 10 mm. The direction of the focal side of the old coke oven is inclined upward due to the difference in the amount of expansion and expansion of the furnace body. In order to adapt to various deformations, the coke oven door and the door picking machine must adopt a special structure to make the two closely cooperate. When the door is closed and closed, the relative positions of the door and the door frame are ensured to be the same, and the structural dimensions are consistent with each other; each action stroke of the door picker must be consistent with the size of the furnace door to eliminate the influencing factors of the deformation of the furnace body. Ensure that the coke oven locomotive realizes PLC control. In order to meet the above conditions, the structural characteristics of the furnace door and the door lifter can be combined into the following points: 1 The distance between the top end of the spring bolt and the door bar a, b is a fixed value, see 1, to ensure the length direction of the coke oven body There is no influence on the stroke of the pressure extraction cylinder during deformation.
2 The inner and outer end faces of the door frame hook are all processed surfaces, the relative position of the door door bolt and the door frame hook is a certain value, and the lower door part of the bolt spring group door body "pressing" cylinder P1aP2b furnace door hook door spring door The P1D pressure is bolted; the relationship between the furnace door and the door picker indicates the front limit of the machine. During the forward movement of the door picker, the front limit is automatically stopped immediately after contact with the outer end surface of the door frame hook, no manual connection is required, and the stroke is not affected by the furnace hole. The difference between the amount of expansion between them.
3 With the increase of the age of the coke oven, the thermal expansion of the upper and lower parts of the machine side of the machine is different, the upper part is inclined outward, and the tilting adjustment cylinder is arranged at the bottom of the door of the picking machine, so that the door picker is inclined along the height of the coke oven door. Make sure that the door hook of the door picker is accurately picked up and the door is removed.
4The hydraulic pick-up locomotive moves with two speeds. When the door is picked up, it advances quickly. When the door is close to the furnace door frame, the machine head rotates 90°. After the current limit contact hook, the door picker automatically stops immediately.
The furnace door repair station and the furnace door frame cleaning air-cooled suspension spring furnace door repair station have different structural types from the ordinary rigid furnace door repair station. The process equipment required by the two is completely different from the structure and elevation of the civil engineering professional requirements. It should not be neglected in the process layout, and should be considered comprehensively, otherwise it will have subversive consequences for the design.
The furnace door and the furnace door frame cleaning device are indispensable for the air-cooled suspended spring furnace door. At present, the mechanical cleaning furnace door and the furnace door frame device installed in the domestic coke oven locomotive generally reflect the effect is not good, and the reasons for the correction are not enough for the manufacturers. It is considered to be optional. On the contrary, it is a good need to ensure the spring furnace door to maintain sealing performance. In recent years, many manufacturers in China have adopted the measures of cleaning the edge of the furnace door with high-pressure water. The effect is very good, which is beneficial to the protection of the knife edge, but should not give up the way to improve the mechanical cleaning device.
Development prospects The air-cooled suspended spring furnace door is increasingly welcomed by domestic coking colleagues. People have become more and more aware of its superiority in environmental protection and energy conservation. From the early 80s, one form of spring furnace door has been developed to the present 3 There are many kinds, and each has its own characteristics. At present, the factories are rushing to transform the ordinary furnace door, the process is striving for conditions, and the implementation of the spring furnace door is accelerated, creating conditions for the automation of the coke oven locomotive and improving the overall equipment level of the coke oven. The spring furnace door is widely used not only in the top-mounted coke oven, but also in the development of the tamping coke oven. With the large-scale coke oven, the tamping coke oven will be developed from the current 4.3m, 5.5m to 6.25m or more. . In order to adapt to the large-scale development of coke ovens, it is necessary to further study the bending deformation caused by the thermal stress of the air-cooled suspended spring door and the mutual positional relationship with the furnace frame when the height and width of the coke oven are increased, and the research design is more advanced. The furnace door to adapt to the development of the coking industry.
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