Combustion settling chamber with explosion-proof top cover

Abstract

The utility model relates to a top cover explosion-proof type combustion settling chamber which comprises a combustion settling chamber body, a smoke inlet pipeline and a smoke outlet pipeline, the smoke inlet pipeline and the smoke outlet pipeline are arranged on the top of the combustion settling chamber body, and a movable top cover is further arranged on the top of the combustion settling chamber body and located between the smoke inlet pipeline and the smoke outlet pipeline. The movable top cover covers an opening in the top of the combustion settling chamber body, and the movable top cover and the combustion settling chamber body are sealed through a labyrinth seal and a sand seal; the movable top cover is not fixedly connected with the combustion settling chamber body, and under the explosion pressure, the movable top cover is separated from the combustion settling chamber body, so that pressure relief is achieved. A movable top cover is designed at the top of the combustion settling chamber, and a labyrinth sealing and sand sealing combined sealing mode is adopted. The movable top cover and the combustion settling chamber body are kept sealed in a normal working state, but when explosion occurs, the top cover can be automatically separated from the combustion settling chamber body under the action of explosion pressure, rapid pressure relief is achieved, and damage of explosion to an equipment body is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of metallurgical equipment and relates to a combustion settling chamber with an explosion-proof top cover. Background Art

[0002] In the field of steelmaking, electric arc furnace steelmaking (EAF) is a widely used steelmaking process at present, especially in areas with sufficient power supply. Electric arc furnace steelmaking uses electric energy to heat and melt raw materials such as scrap steel and hot metal through the arc generated by electrodes to produce steel.

[0003] During the process of electric furnace steelmaking, a large amount of high-temperature flue gas is generated. The flue gas is sent to the combustion settling chamber for secondary combustion of CO and primary dust removal of particulate matter in the flue gas. At present, a large amount of hot metal is often added in domestic electric furnace steelmaking, and the CO concentration in the flue gas will increase significantly, reaching the explosion concentration. Since the temperature of the flue gas entering the settling chamber may be within the CO explosion temperature range, if the equipment does not have special explosion-proof measures, the pressure generated by the explosion will cause serious damage to the equipment body and may even endanger the safety of surrounding facilities and personnel. Therefore, explosion-proof of the settling combustion chamber is necessary, and at the same time, the airtightness during normal operation needs to be considered while ensuring explosion-proof. Summary of the Utility Model

[0004] In view of this, the purpose of the utility model is to solve the explosion-proof problem of the settling combustion chamber and provide a combustion settling chamber with an explosion-proof top cover.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A combustion settling chamber with an explosion-proof top cover includes a combustion settling chamber body, a flue gas inlet pipe and a flue gas outlet pipe arranged on the top of the combustion settling chamber body. An activity top cover is also arranged on the top of the combustion settling chamber body, and the activity top cover is located between the flue gas inlet pipe and the flue gas outlet pipe; the activity top cover covers the opening on the top of the combustion settling chamber body, and the two are sealed with each other through labyrinth seal and sand seal; there is no fixed connection between the activity top cover and the combustion settling chamber body. Under the explosion pressure, the activity top cover is separated from the combustion settling chamber body to achieve pressure relief.

[0007] Further, a raised sealing wall is arranged on the inner side of the opening on the top of the combustion settling chamber body, and a refractory layer is arranged on the bottom of the activity top cover. The refractory layer is pressed against the sealing wall to form a sealing structure with the side and top surfaces of the sealing wall.

[0008] Further, two sealing grooves are arranged on the outer side of the opening on the top of the combustion settling chamber body, and two sealing knives are arranged on the activity top cover. The two sealing knives are inserted into the two sealing grooves one by one to form a labyrinth sealing structure, and sand is filled in the sealing grooves to form a sand seal structure.

[0009] Further, the height of the sealing groove is 350 mm.

[0010] Further, the sealing wall is also made of refractory material, with a width of 100 mm and a height of 100 mm.

[0011] The beneficial effects of the present utility model are as follows:

[0012] 1. The top of the combustion settling chamber in the present utility model is designed with a movable top cover, and a combined sealing method of labyrinth sealing and sand sealing is adopted. The movable top cover is sealed with the settling chamber body under normal working conditions, but in case of explosion, the top cover can be automatically separated from the combustion settling chamber body under the action of explosion pressure, realizing rapid pressure relief and avoiding damage to the equipment body caused by explosion. This design effectively prevents the danger that may occur when the CO concentration reaches the explosion range, and helps to improve the overall safety of the equipment.

[0013] 2. By adopting a double-sealing structure of labyrinth sealing and sand sealing in the present utility model, the sealing performance between the movable top cover and the settling chamber body is extremely excellent during normal operation. The labyrinth sealing forms a complex channel through two circles of sealing knives and sealing grooves, effectively preventing flue gas leakage; the sand sealing further improves the sealing performance, and can still maintain the stability of the sealing structure even in a high-temperature and high-pressure environment.

[0014] Other advantages, objectives and features of the present utility model will be described to some extent in the subsequent description, and to some extent, will be obvious to those skilled in the art based on the study of the following text, or can be taught from the practice of the present utility model. The objectives and other advantages of the present utility model can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be described in detail preferably with reference to the accompanying drawings, where:

[0016] Figure 1 is a cross-sectional view of the explosion-proof top cover type combustion settling chamber of the present utility model.

[0017] Figure 2 is a top view of the explosion-proof top cover type combustion settling chamber of the present utility model.

[0018] Figure 3 is an enlarged view of the explosion-proof cover groove seal.

[0019] Reference numerals: 1 - combustion settling chamber body; 2 - top of the settling chamber; 3 - movable top cover; 4 - sealing wall; 5 - sealing knife; 6 - sealing groove; 7 - refractory layer; 8 - magnesia sand. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following describes the implementation manners of the present utility model through specific specific examples. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. The present utility model can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present utility model. It should be noted that the drawings provided in the following embodiments only illustrate the basic concept of the present utility model in a schematic manner. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0021] Among them, the drawings are only for illustrative purposes, showing only schematic diagrams rather than actual diagrams, and should not be construed as a limitation to the present utility model; in order to better illustrate the embodiments of the present utility model, some components in the drawings will be omitted, enlarged or reduced, which does not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0022] In the drawings of the embodiments of the present utility model, the same or similar reference numerals correspond to the same or similar components; in the description of the present utility model, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only for illustrative purposes and should not be construed as a limitation to the present utility model. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0023] Please refer to Figures 1 to 3 , which is a top-cover explosion-proof combustion settling chamber, including a combustion settling chamber body 1 and a flue gas inlet pipe and a flue gas outlet pipe arranged at the top 2 of the settling chamber. A movable top cover 3 is also arranged at the top of the combustion settling chamber body 1, and the movable top cover 3 is located between the flue gas inlet pipe and the flue gas outlet pipe; the movable top cover 3 covers the opening at the top 2 of the settling chamber, and the two are sealed with each other through a labyrinth seal and a sand seal; there is no fixed connection between the movable top cover 3 and the combustion settling chamber body 1. When a CO explosion occurs in the system, under the explosion pressure, the movable top cover 3 separates from the combustion settling chamber body 1 to achieve pressure relief.

[0024] An annular raised sealing wall 4 is arranged on the inner side of the opening at the top 2 of the settling chamber. Both the top 2 of the settling chamber and the movable cover adopt an adiabatic design. A refractory layer 7 is arranged at the bottom of the movable top cover 3, and the refractory layer 7 is pressed against the sealing wall 4 to form a sealing structure with the side and top surfaces of the sealing wall 4.

[0025] On the outer side of the opening of the top 2 of the settling chamber, two sealing grooves 6 are provided. Two sealing knives 5 are provided on the movable top cover 3. The two sealing knives 5 are inserted into the two sealing grooves 6 one by one to form a labyrinth sealing structure. Magnesite 8 is filled in the sealing grooves 6 to form a sand sealing structure. The height of the sealing groove 6 is 350 mm. The sealing wall 4 is also made of refractory material, with a width of 100 mm and a height of 100 mm.

[0026] On the inner side of the movable top cover 3, the refractory layer 7 and the sealing wall 4 form a sealing structure. On the outer side, the movable top cover 3, the sealing groove 6 and the magnesite 8 form two external seals. It ensures the sealing requirements for normal production and can play an explosion-proof role at the same time.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the present technical solution, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A top-cover explosion-proof combustion sedimentation chamber, comprising a combustion sedimentation chamber body, a flue gas inlet pipe and a flue gas outlet pipe arranged at the top of the combustion sedimentation chamber body, and is characterized in that: The top of the combustion settling chamber body is also provided with a movable top cover, and the movable top cover is located between the flue gas inlet pipe and the flue gas outlet pipe; the movable top cover seals the opening at the top of the combustion settling chamber body, and the two are sealed with each other through labyrinth seals and sand seals; there is no fixed connection between the movable top cover and the combustion settling chamber body, and under the explosion pressure, the movable top cover separates from the combustion settling chamber body to achieve pressure relief.

2. The explosion-proof combustion sedimentation chamber of the top cover according to claim 1, wherein: An annular raised sealing wall is provided on the inner side of the opening at the top of the combustion settling chamber body, and a refractory layer is provided at the bottom of the movable top cover. The refractory layer is pressed against the sealing wall to form a sealing structure with the side and top surfaces of the sealing wall.

3. The explosion-proof combustion sedimentation chamber of the top cover according to claim 1, characterized in that: Two sealing grooves are provided on the outer side of the opening at the top of the combustion settling chamber body, and two circles of sealing knives are provided on the movable top cover. The two circles of sealing knives are inserted into the two sealing grooves one by one to form a labyrinth sealing structure, and sand is filled in the sealing grooves to form a sand sealing structure.

4. The explosion-proof combustion sedimentation chamber of the top cover according to claim 3, wherein: The height of the sealing groove is 350 mm.

5. The explosion-proof combustion sedimentation chamber of the top cover according to claim 2, characterized in that: The sealing wall is also made of refractory material, with a width of 100 mm and a height of 100 mm.

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