On-line repairing device for high-temperature flue of large downstream pot-type calcining furnace

Abstract

The utility model relates to a repairing tool, in particular to an on-line repairing device for a high-temperature flue of a large downstream pot-type calcining furnace. Comprising a top plate and a bottom plate, a pouring area is formed between the top plate and the bottom plate, and the top plate and the bottom plate are connected through a plurality of supporting hair hooks; the bottom plate is larger than the top plate in size. After the repairing device is welded, the whole device is placed at the position of the damaged flue, a mixed refractory material is poured, the bottom plate is burnt out after the repairing device is subjected to high temperature, the refractory material is combined on the original flue, and online repairing of the flue is achieved.

Description

Technical Field

[0001] The utility model relates to a repair tool, in particular to an on-line repair device for a high-temperature flue of a large-scale down-flow pot-type calciner. Background Art

[0002] Before the technical transformation, when a fault of the internal heat-insulating refractory bricks of the high-temperature flue of the calciner occurred, in order to carry out the repair work, the entire system needed to be shut down and cooled for 2 days. After testing that the oxygen content was above 19% and qualified, personnel entered the inside of the flue through the manhole door of the boiler, and built refractory bricks to repair the damaged parts. There were safety risks such as high temperature, lack of oxygen, poisoning, and collapse and injury in the flue construction. At the same time, the shutdown of the calciner and the medium-pressure boiler had a great impact on the equipment body and affected the service life. Content of the Utility Model

[0003] In the prior art, after the refractory material inside the high-temperature flue of the calciner is damaged during use, due to the high temperature of about 800 - 1100 °C, the repair can only be carried out after the entire calciner is shut down and cooled, which affects production. In this application, it will be applied to the on-line repair of the damaged parts of the calciner in the carbon industry without shutting down production.

[0004] To achieve the above object, the technical solution adopted by the utility model is: an on-line repair device for a high-temperature flue of a large-scale down-flow pot-type calciner, including a top plate and a bottom plate. A pouring area is formed between the top plate and the bottom plate, and the top plate and the bottom plate are connected by a plurality of supporting hooks; the size of the bottom plate is larger than that of the top plate.

[0005] Further, a supporting fork is provided at one end of the supporting hook close to the bottom plate, and the included angle of the supporting fork is 90°.

[0006] Further, the size of the bottom plate is 2 CM larger than the size of the position to be repaired.

[0007] The size of the top plate is 4 CM smaller than the size of the position to be repaired.

[0008] Further, the supporting hooks are arranged in two rows.

[0009] Further, the spacing between the supporting hooks is 50 mm.

[0010] Further, the length of the supporting hook is the same as the thickness of the high-temperature flue.

[0011] Compared with the prior art, the advantages of the present utility model are as follows: After the welding of the repair device is completed, the whole set of device is placed at the damaged flue, and the mixed refractory material is poured. After the repair device is exposed to high temperature, the bottom plate is burned out, and the refractory material is combined with the original flue to realize the on-line repair of the flue. The research and application of the on-line repair device for the high-temperature flue of the calciner have made great contributions to reducing the production operation cost. This repair device is an original design and application in the domestic carbon industry and is a successful case of on-line repair of high-temperature flues. Brief Description of the Drawings

[0012] Figure 1 It is a schematic structural diagram of an on-line repair device for the high-temperature flue of a large-scale down-flow pot-type calciner;

[0013] Wherein: top plate 1, bottom plate 2, supporting hook 3, supporting fork 4. Specific Embodiment

[0014] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0015] As Figure 1 shown, this embodiment provides an on-line repair device for the high-temperature flue of a large-scale down-flow pot-type calciner. An on-line repair device for the high-temperature flue of a large-scale down-flow pot-type calciner includes a top plate 1 and a bottom plate 2. The top plate 1 and the bottom plate 2 are made of heat-resistant steel plates with a thickness of 10 mm that meet the national standard GB / T4238-1992. A pouring area is formed between the top plate 1 and the bottom plate 2. The fabricated bottom plate 2 is evenly welded with supporting hooks 3 at a length interval of 50 mm. The top plate 1 is welded to the top of the supporting hooks 3. Special supporting hooks 3 are made of steel bars. Secondary steel bars with a diameter of 8 mm, a yield strength of 335 MPa, and an ultimate strength of 510 MPa are selected as the welding hook materials. The length of the supporting hooks 3 is designed to be the same as the thickness of the high-temperature flue; the size of the bottom plate 2 is larger than that of the top plate 1.

[0016] In another embodiment of the present application, a supporting fork 4 is provided at one end of the supporting hook 3 close to the bottom plate 2. The supporting fork of the supporting hook 3 is designed at a 90-degree angle, and the supporting hooks 3 are welded in double rows parallel.

[0017] In another embodiment of the present application, the size of the bottom plate 2 is 2 cm larger than the size of the position to be repaired, and the size of the top plate 1 is 4 cm smaller than the size of the position to be repaired.

[0018] In another embodiment of the present application, the length of the supporting hook 3 is the same as the thickness of the high-temperature flue.

[0019] Working principle: On the high-temperature flue of the pot-type calciner, the damaged size is measured externally, and an arc design that fits the damaged position is made according to the shape of the damaged part of the high-temperature flue; the top plate 1, the supporting hook 3, the bottom plate 2, etc. are respectively manufactured and welded into one body; after welding, the whole set of devices is placed at the damaged flue. The bottom plate 2 has a supporting effect on the inner wall of the flue. According to the self-developed formula, heavy-duty cast refractory materials and mortars are prepared to achieve a tight combination effect. Fill, fix, and air-dry naturally in the pouring area of the repair device. Note that curing is carried out once every 4 hours after shaping. After drying, the refractory material at the repair position forms an integral body with the original flue, achieving a tight combination between the repair part and the pouring material, and a tight combination between the pouring material and the original refractory material, so as to achieve the purpose of repairing local wounds.

[0020] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An online repair device for high-temperature flue of a large downstream pot-type calcining furnace, characterized in that: It comprises a top plate (1) and a bottom plate (2), wherein a casting area is formed between the top plate (1) and the bottom plate (2), and the top plate (1) and the bottom plate (2) are connected via a plurality of supporting hooks (3); the size of the bottom plate (2) is larger than that of the top plate (1).

2. The large downstream pot-type calcining furnace high temperature flue online repairing device according to claim 1 is characterized in that: A support fork (4) is provided at one end of the support hook (3) close to the bottom plate (2), and the included angle of the support fork (4) is 90°.

3. The online repair device for high-temperature flue of a large downstream pot-type calcining furnace according to claim 1 is characterized in that: The size of the bottom plate (2) is 2CM larger than the size of the position to be repaired; the size of the top plate (1) is 4CM smaller than the size of the position to be repaired.

4. The large downstream pot-type calcining furnace high temperature flue online repairing device according to claim 1 is characterized in that: The supporting hooks (3) are arranged in double rows.

5. The large downstream pot-type calcining furnace high temperature flue online repairing device according to claim 1 is characterized in that: The spacing between the supporting hooks (3) is 50 mm.

6. The large downstream pot-type calcining furnace high temperature flue online repairing device according to claim 1 is characterized by: The length of the supporting hair hook (3) is the same as the thickness of the high-temperature flue.

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