An explosion-proof device for the furnace body of a heating furnace

Abstract

An explosion-proof device for the furnace body of a heating furnace, belonging to the field of thermal engineering. It mainly reduces the damage to the refractory materials, steel structure and personnel of the heating furnace caused by the explosion in the furnace chamber of the existing heating furnace due to the failure of gas detection instruments and meters, human operation errors or other reasons. The explosion-proof device of the present invention is installed on the furnace top of the heating furnace and relies on its own gravity to ensure the explosion relief pressure required by the furnace body. When an accidental explosion occurs in the furnace chamber, the explosion-proof head will pop up when the gas in the furnace reaches the designed explosion relief pressure. After popping up, the hole below will release the explosion pressure in the furnace. A stop limiting device is arranged above the explosion-proof head to prevent the explosion-proof head from flying away and causing secondary injuries. The explosion-proof device is provided with a counterweight disk so that the explosion relief pressure can be adjusted as needed. When installing the explosion-proof device, a refractory fiber blanket is wound around the explosion-proof head to ensure the sealing of the furnace chamber.

Description

Technical Field

[0001] The invention relates to an explosion-proof device for a heating furnace body and a use method thereof, belonging to the field of thermal engineering. Background Art

[0002] After a heating furnace fails to ignite once, the gas pipeline will be purged and released, but the residual gas in the heating furnace is not purged and released. Factories do not detect the gas condition in the furnace or only use a single furnace gas detector for detection. If the heating furnace burner is ignited again in the case of personnel misoperation or the gas detection equipment in the furnace fails for no reason, there is a possibility of an explosion in the furnace. Since the temperature in the heating furnace is about 1200℃, the traditional pipeline explosion-proof valve cannot withstand such a high temperature, so the existing heating furnace body is not equipped with a furnace body explosion-proof device. In the event of an explosion, the refractory material and the furnace body steel structure in the furnace will bear the impact. The heating furnace with a furnace door may also have the possibility of the furnace door being blown away and injuring people. In response to this situation, I invented an explosion-proof device and use method for the heating furnace body, which can reduce the losses caused by accidental furnace explosions. Summary of the invention

[0003] The technical solution of the present invention is to develop an explosion-proof device for a heating furnace body and a method of using the device in response to the potential safety hazards existing in the above-mentioned existing heating furnace bodies.

[0004] An explosion-proof device for a heating furnace body comprises a stop limit tube 1, an explosion-proof head rod 2, a sealing groove 4, a base 5, an anchoring clamp 7, a counterweight plate 8, sealing sand 9, a sealing fiber board 10, a sealing fiber blanket 11, an anchoring brick 12, a refractory casting block 13, and a heat-insulating fiber blanket 14;

[0005] The explosion-proof head is composed of an explosion-proof head rod 2, an anchoring clamp 7, a counterweight plate 8, an anchoring brick 12, a refractory casting block 13, and an insulating fiber blanket 14;

[0006] The explosion-proof head rod 2 passes through the stop limit tube 1, and the stop limit tube 1 is connected to the top of the furnace roof steel structure 3; the lower end of the explosion-proof head rod 3 is welded to the anchor clamp, and the counterweight plate 8 passes through the explosion-proof head rod 2 and is sleeved on the anchor clamp; the upper part of the anchor brick 12 is clamped in the anchor clamp 7 and fixed, and the insulation fiber blanket 14 is connected to the lower surface of the anchor clamp 7, and the insulation fiber blanket 14 is plugged into the upper side of the anchor brick 12; the lower part of the insulation fiber blanket 14 is connected to the refractory casting block 13 and installed on the lower side of the anchor brick 12; the outer side of the refractory casting block 13 is wrapped with the sealing fiber blanket 11;

[0007] In the normal state, the downward clamping hand of the anchoring clip 7 is inserted into the sealing groove 4; a sealing fiber board 10 is placed at the bottom layer of the sealing groove 4, and the sealing groove 4 is fixed above the inner surface of the base 5. The upper part of the base 5 is fixedly connected to the furnace top steel structure section steel 3; the furnace top refractory 6 is perforated according to the edge size of the explosion-proof head, and the refractory casting block 13 at the lower part of the explosion-proof head is placed in the perforated part of the furnace top refractory 6; the sealing sand 9 is placed on the sealing fiber board 10 in the sealing groove 4 and outside the clamping hand of the anchoring clip 7.

[0008] When an accidental explosion occurs in the furnace, the explosion-proof head moves upward until the upper surface of the counterweight disk 8 is flush with the lower surface of the stop limit pipe 1.

[0009] The sealing groove 4 and the sealing fiber board 10 are circular rings.

[0010] The thickness range of the sealing fiber blanket 11 is 8 - 12 mm.

[0011] The thickness range of the refractory casting block 13 is 200 - 400 mm.

[0012] A small step is arranged in the middle of the refractory casting block 13, and the width range of the small step is 10 - 100 mm.

[0013] The thickness range of the heat insulation fiber blanket 14 is 50 - 150 mm.

[0014] The taper range of the lower frustum of the small step of the refractory casting block 13 is 10° - 30°.

[0015] Advantages of the present invention:

[0016] 1. The explosion-proof device is configured with the anchoring brick 12, the refractory casting block 13, and the heat insulation fiber blanket 14. Such refractory material configuration enables the explosion-proof device to withstand the high temperature of 1200 °C in the furnace; by adjusting the thicknesses of the refractory casting block 13 and the heat insulation fiber blanket 14, the explosion-proof device can withstand the same temperature as the furnace top of the heating furnace.

[0017] 2. The stop limit pipe 1 configured in the explosion-proof device is connected to the furnace top steel structure 3, enabling the stop limit pipe 1 to withstand the corresponding impact force and ensuring that the explosion-proof head and the like will not fly off during detonation and cause other damages.

[0018] 3. The explosion-proof head rod 2 is a circular steel pipe, and the circular steel pipe passes through the stop limit pipe 1. This structure can ensure that the explosion-proof head and the like will move up and down under the restriction of the stop limit pipe 1 during detonation, and ensure that the explosion-proof head and the like can fall back to their original positions after detonation to re-seal the heating furnace.

[0019] 4. According to the size of the furnace body space and the required explosion relief ratio of different heating furnaces, the required explosion relief area of the heating furnace can be calculated. The bottom area of the refractory casting block 13 of the explosion-proof device can be increased or decreased. For a larger explosion relief area, several such explosion-proof devices are installed on the furnace top.

[0020] 5. The adjustment of the explosion relief pressure can be completed by using the counterweight disc 8. The explosion relief pressure is the sum of the weights of the explosion-proof head rod 2, the anchoring clip 7, the counterweight disc 8, the anchoring brick 12, the refractory casting block 13, and the heat-insulating fiber blanket 14 divided by the bottom area of the refractory casting block 13. By using several counterweight discs of different sizes, different explosion relief pressures can be adjusted.

[0021] 6. The lower part of the refractory casting block 13 is cast into a frustum shape, which can better achieve the sealing effect on the furnace gas.

[0022] 7. A small step is arranged in the middle of the refractory casting block 13, which can play a better role in sealing the furnace gas. Description of the Drawings

[0023] Figure 1 It is a schematic diagram of the installation position of the present invention.

[0024] Figure 2 It is a schematic diagram of the detonation position of the present invention.

[0025] Figure 3 It is a top view schematic diagram of the present invention.

[0026] Figure 4 It is a schematic diagram of the key dimensions of the present invention;

[0027] Among them: the stop limit tube 1, the explosion-proof head rod 2, the sealing groove 4, the base 5, the anchoring clip 7, the counterweight disc 8, the sealing sand 9, the sealing fiber board 10, the sealing fiber blanket 11, the anchoring brick 12, the refractory casting block 13, the heat-insulating fiber blanket 14. Detailed Embodiments

[0028] The following makes a detailed description of the present invention in conjunction with the drawings in the specification.

[0029] It mainly includes a stop limit tube, an explosion-proof head rod, a sealing groove, a base, an anchoring clip, a counterweight disc, sealing sand, a sealing fiber board, a sealing fiber blanket, an anchoring brick, a refractory casting block, and a heat-insulating fiber blanket; the base is connected to the steel section of the furnace top steel structure by bolts; a circular hole is drilled in the upper part of the furnace top refractory material with a radius equal to the explosion-proof head radius plus A, and a circular hole is drilled in the lower part of the furnace top refractory material with a radius equal to the refractory casting block radius plus A to form a step similar to the refractory casting block; the anchoring clip is welded under the explosion-proof head, the upper part of the anchoring brick is stuck in the anchoring clip for fixation, the heat-insulating fiber blanket is stuffed around the anchoring brick, and a formwork is used to pour the refractory casting material to form a refractory casting block, with the shape as shown in the figure; the sealing fiber board is placed in the sealing groove, the sealing fiber blanket is wrapped around the outer circle of the refractory casting block, the explosion-proof head and the refractory casting block are placed in the furnace top opening, the sealing sand is placed in the sealing groove, the counterweight disc is sleeved on the steel pipe above the explosion-proof head, the stop limit tube is sleeved on the steel pipe above the explosion-proof head, and the brackets at both ends of the stop limit tube are connected to the steel section of the furnace top steel structure by bolts to complete the installation of the explosion-proof device.

[0030] When an accidental explosion occurs in the furnace, the refractory casting block is separated from the furnace top refractory material under the impact of the explosion and moves upward. The explosion-proof head, anchoring clip, counterweight disc, anchoring brick, and heat-insulating fiber blanket move upward together. When the upper surface of the counterweight disc contacts the lower surface of the stop limit tube, the explosion-proof head rod, anchoring clip, counterweight disc, anchoring brick, refractory casting block, and heat-insulating fiber blanket stop moving upward. At this time, the explosion gas in the furnace vents through the gap between the refractory casting block and the furnace top refractory material. When the explosion pressure in the furnace decreases, the explosion-proof head, anchoring clip, counterweight disc, anchoring brick, refractory casting block, and heat-insulating fiber blanket fall back to their original positions to re-seal the furnace top, completing an explosion-proof action.

Claims

1. An explosion-proof device for a heating furnace body, characterized in that: The explosion-proof device includes a stop limit tube (1), an explosion-proof head rod (2), a sealing groove (4), a base (5), an anchor clip (7), a counterweight plate (8), sealing sand (9), a sealing fiber board (10), a sealing fiber blanket (11), an anchor brick (12), a refractory casting block (13), and a heat-insulating fiber blanket (14); The explosion-proof head is composed of an explosion-proof head rod (2), an anchor clip (7), a counterweight plate (8), an anchor brick (12), a refractory casting block (13), and a heat-insulating fiber blanket (14); The explosion-proof head rod (2) passes through the stop limit tube (1), and the stop limit tube (1) is connected to the top of the furnace roof steel structure section (3); the lower end of the explosion-proof head rod (2) is welded to the anchor clip, and the counterweight plate (8) passes through the explosion-proof head rod (2) and is sleeved on the anchor clip; the upper part of the anchor brick (12) is clamped in the anchor clip (7) for fixation, the heat-insulating fiber blanket (14) is connected to the lower surface of the anchor clip (7), and the heat-insulating fiber blanket (14) is stuffed on the side of the upper part of the anchor brick (12); the lower surface of the heat-insulating fiber blanket (14) is connected to the refractory casting block (13) and is installed on the side of the lower part of the anchor brick (12); the outside of the refractory casting block (13) is wrapped with a sealing fiber blanket (11); Under normal conditions, the downward clamping hand of the anchor clip (7) is inserted into the sealing groove (4); a sealing fiber board (10) is placed at the bottom layer of the sealing groove (4), the sealing groove (4) is fixed above the inner surface of the base (5), and the base (5) is fixedly connected to the furnace roof steel structure section (3) above; the furnace top refractory (6) is opened with a hole according to the edge size of the explosion-proof head, and the refractory casting block (13) at the lower part of the explosion-proof head is placed in the hole opened in the furnace top refractory (6); the sealing sand (9) is placed on the sealing fiber board (10) in the sealing groove (4) and outside the clamping hand of the anchor clip (7); When an accidental explosion occurs in the furnace, the explosion-proof head moves upward until the upper surface of the counterweight plate (8) contacts the lower surface of the stop limit tube (1); The thickness range of the refractory casting block (13) is 200 - 400 mm; A small step is provided in the middle of the refractory casting block (13), and the width range of the small step is 10 - 100 mm.

2. The explosion-proof device for a heating furnace body according to claim 1, characterized in that: The sealing groove (4) and the sealing fiber board (10) are circular rings.

3. An explosion-proof device for a heating furnace body as described in claim 1, characterized in that: The thickness range of the sealing fiber blanket (11) is 8 - 12 mm.

4. An explosion-proof device for a heating furnace body according to claim 1, characterized in that: The thickness range of the heat-insulating fiber blanket (14) is 50 - 150 mm.

5. An explosion-proof device for a heating furnace body according to claim 1, characterized in that: The taper range of the lower frustum of the small step of the refractory casting block (13) is 10° - 30°.

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