Sealing, insulating and protecting structure for furnace cover of calcium carbide furnace

Abstract

The utility model discloses a sealing, insulating and protecting structure for a furnace cover of a calcium carbide furnace, which belongs to the technical field of metallurgical processing and comprises a furnace cover, a furnace shell, a first flange arranged at the bottom of the furnace cover, a second flange arranged at the top of the furnace shell, a supporting and positioning bolt, an adjusting nut, a steel base plate, an insulating plate, an annular protecting plate, a rock wool layer and a fine sand layer. The supporting and positioning bolts are circumferentially distributed on the first flange at equal intervals and are in threaded fit with the first flange, the adjusting nuts are in threaded fit with the supporting and positioning bolts and located on the lower side of the first flange, the steel base plate is located at the bottom ends of the bolts, and the insulating plate is located between the steel base plate and the second flange. According to the sealing structure, CO gas can be prevented from overflowing, positioning and leveling are achieved through the supporting and positioning bolts, and reliable insulation between the furnace shell and the furnace cover is achieved through the insulating plate.

Description

Technical Field

[0001] The utility model relates to the technical field of calcium carbide furnace cover sealing, in particular to a calcium carbide furnace cover sealing insulation protection structure. Background Art

[0002] Calcium carbide is an important basic chemical product. The raw materials of calcium carbide production, coke and quicklime, are mixed and added into the calcium carbide furnace. The arc heat and resistance heat generated by the three-phase electrodes react to generate calcium carbide, and a large amount of CO exhaust gas is generated at the same time. The leakage of CO exhaust gas poses a safety risk of poisoning and suffocation, and a large amount of air entering the furnace will pose a safety hazard of explosion. Therefore, the sealing of the calcium carbide furnace system is of great significance to ensure safe production. The three-phase electrodes are inserted into the calcium carbide furnace through the holes in the furnace cover to heat the charge. In order to prevent the conductive arc from burning the equipment, firstly, the furnace cover must be leveled to ensure that the gap between the three-phase electrodes and the holes in the furnace cover is uniform, providing convenient conditions for setting insulation in various parts. Secondly, reliable insulation must be set at each layer between the electrode and the furnace cover, the furnace cover and the furnace body. Since the furnace cover and the furnace body are the largest components of the calcium carbide furnace and the contact surface between the two is large, the horizontal adjustment of the furnace cover and the reliable insulation setting between the furnace cover and the furnace body play a decisive role in the safe and stable operation of the calcium carbide furnace. Utility Model Content

[0003] The utility model aims to provide a sealing insulation protection structure for a calcium carbide furnace cover, aiming to solve the problem in the above-mentioned background technology that there is a gap between the calcium carbide furnace cover and the furnace shell, which requires sealing and insulation.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a sealing and insulating protection structure of a calcium carbide furnace cover, comprising a furnace cover and a furnace shell matched up and down, and also comprising a first flange arranged at the bottom of the furnace cover, a second flange arranged at the top of the furnace shell, supporting and positioning bolts, adjusting nuts, steel pads, insulating plates, annular guard plates, rock wool layers and fine sand layers. The supporting and positioning bolts are arranged on the first flange at equal intervals and are threadedly matched with the first flange. The adjusting nuts are threadedly matched with the supporting and positioning bolts and are located on the lower side of the first flange. The steel pad is located at the bottom end of the supporting and positioning bolts. The insulating plate is located between the steel pad and the second flange. The annular guard plate is arranged around the outside of the first flange. The annular guard plate is fixedly connected to the edge of the first flange by steel bars arranged at equal intervals. The rock wool layer and the fine sand layer are laid in sequence from bottom to top and filled between the furnace cover and the annular guard plate. The lower end of the rock wool layer acts on the second flange.

[0005] Furthermore, the specification of the supporting positioning bolts is M20*120.

[0006] Furthermore, the steel pad has a specification of 100*100*10mm.

[0007] Furthermore, the insulation board is made of HP-8 mica insulation board.

[0008] The utility model has the following beneficial effects:

[0009] The utility model provides a sealing insulation protection structure for a calcium carbide furnace cover, which has a reasonable structural design, is easy to use and has a long service life. Through the structural design of the rock wool layer and the fine sand layer, the furnace cover and the furnace shell are sealed to prevent air from entering and causing explosions, and prevent CO leakage from endangering the health of personnel, while also achieving a heat insulation effect; the insulating board plays an insulating role, and the furnace cover can also be adjusted horizontally by supporting positioning bolts. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0011] Figure 2 This is a schematic diagram of the enlarged structure of A of the utility model;

[0012] In the figure: 1. furnace cover; 2. furnace shell; 3. supporting positioning bolts; 4. adjusting nuts; 5. steel pads; 6. insulating plates; 7. circular guard plates; 8. steel bars; 9. rock wool layer; 10. fine sand layer. DETAILED DESCRIPTION

[0013] like Figures 1 to 2 As shown, a sealing insulation protection structure of a calcium carbide furnace cover comprises a first flange 1 arranged at the bottom of the furnace cover, a second flange 2 arranged at the top of the furnace shell, support positioning bolts 3, adjusting nuts 4, steel pads 5, insulating plates 6, annular guard plates 7, steel bars 8, rock wool layers 9 and fine sand layers 10, the support positioning bolts 3 are arranged at equal intervals at the bottom of the furnace cover and threadedly matched with the first flange 1, the adjusting nuts 4 are threadedly matched with the support positioning bolts 3, 126 support positioning bolts 3 are provided, and the furnace cover can be positioned and leveled by adjusting the support positioning bolts 3 and the adjusting nuts 4 arranged circumferentially; the steel pads 5 and the insulating plates 6 are arranged from From top to bottom, they are arranged on the second flange 2 and below the supporting positioning bolts 3. The steel pad 5 can increase the force-bearing area. The insulating plate 6 installed at the bottom of the steel pad 5 can realize reliable insulation between the furnace cover and the furnace shell. The circular guard plate 7 is arranged around the outside of the first flange 1. The circular guard plate 7 is fixedly connected to the edge of the first flange 1 through steel bars 8 arranged at equal intervals around the circumference. The smelting of calcium carbide in the calcium carbide furnace produces a large amount of CO gas. In order to prevent CO gas from overflowing and air from entering and causing an explosion, a rock wool layer 9 and a fine sand layer 10 are laid from bottom to top between the furnace cover and the circular guard plate 7, and the lower end of the rock wool layer 9 acts on the second flange 2.

[0014] The utility model is arranged between the furnace cover and the furnace shell, has the performances of sealing, insulation and heat insulation, and can support leveling.

Claims

1. A sealing insulation protection structure for a calcium carbide furnace cover, comprising a furnace cover and a furnace shell matched with each other, characterized in that: The furnace shell also includes a first flange (1) arranged at the bottom of the furnace cover, a second flange (2) arranged at the top of the furnace shell, support and positioning bolts (3), adjusting nuts (4), a steel pad (5), an insulating plate (6), a circular guard plate (7), a rock wool layer (9) and a fine sand layer (10), wherein the support and positioning bolts (3) are arranged at equal intervals on the circumference of the first flange (1) and are threadedly engaged with the first flange (1), the adjusting nuts (4) are threadedly engaged with the support and positioning bolts (3) and are located at the lower side of the first flange (1), and the steel pads (5) are provided at the bottom of the furnace shell. The plate (5) is located at the bottom end of the supporting positioning bolt (3), the insulating plate (6) is located between the steel pad (5) and the second flange (2), the annular guard plate (7) is arranged around the outside of the first flange (1), and the annular guard plate (7) is fixedly connected to the edge of the first flange (1) through steel bars (8) arranged at equal intervals in a circle, the rock wool layer (9) and the fine sand layer (10) are laid in sequence from bottom to top and filled between the furnace cover and the annular guard plate (7), and the lower end of the rock wool layer (9) acts on the second flange (2).

2. The sealing insulation protection structure of a calcium carbide furnace cover according to claim 1 is characterized in that: The specification of the support positioning bolt (3) is M20*120.

3. The sealing insulation protection structure of a calcium carbide furnace cover according to claim 1 is characterized in that: The steel backing plate (5) has a specification of 100*100*10 mm.

4. The sealing insulation protection structure for a calcium carbide furnace cover according to claim 1 is characterized in that: The insulating board (6) is made of HP-8 mica insulating board.

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