Furnace bottom structure of vanadium pentoxide melting furnace

Abstract

The utility model discloses a vanadium pentoxide melting furnace bottom structure which comprises H-shaped steel, channel steel, a steel plate, I-shaped steel, a square steel pipe, a water inlet and outlet pipe and a brick layer. The bottom of the furnace bottom is supported by a plurality of channel steels; a steel plate is laid on the channel steels; the H-shaped steel is vertically fixed to the periphery of the upper portion of the steel plate to form a circle. A plurality of I-shaped steels are arranged on the steel plate between the H-shaped steels, and a plurality of square steel tubes are arranged above the I-shaped steels; a water inlet / outlet pipe is arranged in the square steel pipe and is communicated with circulating cooling water; the brick layer is built around the inner ring of the H-shaped steel, and a corundum brick layer is built on the upper portion of the square steel pipe. The furnace bottom is simple in structure and easy to construct, the built melting furnace bottom is high in impact resistance and scouring resistance, the product quality can be improved, and aviation grade tablet vanadium pentoxide can be produced; continuous damage of furnace bottom refractory materials can be avoided, the service life of the furnace bottom of the melting furnace is effectively prolonged, production cost is reduced, and product quality is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of melting furnace structures, in particular to a furnace bottom structure of a vanadium pentoxide melting furnace. Background Art

[0002] At present, the equipment for producing vanadium pentoxide tablets is mainly melting furnace. The refractory masonry of the melting furnace bottom is divided into working layer and heat insulation layer. The working layer refractory material is used in very harsh conditions. It must withstand high temperature and strong chemical erosion, as well as material temperature fluctuations and material impact and scouring. The material enters the melting furnace through the feeder. The working layer of the melting furnace bottom must withstand multiple effects such as high temperature, chemical erosion, mechanical wear, material temperature changes, material impact and scouring. Among them, the damage to the working layer is mainly caused by the erosion and scouring of high-temperature materials, so the working layer of the furnace bottom is very easy to be damaged. Generally, the refractory material of the furnace bottom must be replaced every 4 months of production.

[0003] The existing melting furnace bottom structure is to first build the insulation layer with light insulation bricks, and then build the working layer with fired refractory standard bricks, using vertical and horizontal cross-laying. The disadvantage of this structure is that the high-temperature liquid vanadium pentoxide corrodes the refractory material at the bottom of the furnace, causing the bottom of the melting furnace to be corroded layer by layer, reducing product quality, shortening service life, and increasing production costs; and the silicon content of the vanadium pentoxide tablets produced is higher than 0.08%, the iron content is higher than 0.08%, and the aluminum content is higher than 0.2%. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a furnace bottom structure of a vanadium pentoxide melting furnace with high product quality and long service life.

[0005] In order to solve the above technical problems, the technical scheme adopted by the utility model is: it includes H-shaped steel, channel steel, steel plate, I-shaped steel, square steel pipe, inlet and outlet water pipes and brick layer; the bottom of the furnace bottom is supported by a plurality of channel steels arranged as a support, and a steel plate is laid on the upper part of the channel steel; there are a plurality of H-shaped steels, which are vertically fixed around the upper part of the steel plate to form a circle; a plurality of I-shaped steels are installed and arranged on the steel plate between the H-shaped steels, and a plurality of square steel pipes are installed and arranged above the I-shaped steels; inlet and outlet water pipes are installed in the square steel pipes, and the inlet and outlet water pipes are connected with circulating cooling water; the brick layer is built around the inner circle of the H-shaped steel, and a layer of corundum bricks is built on the upper part of the square steel pipe.

[0006] Furthermore, the H-shaped steels are symmetrically arranged around the upper part of the steel plate, and the opposite H-shaped steels are tightened and fixed by a tightening device.

[0007] Furthermore, the brick layer includes an insulation brick layer, a clay brick layer, a high-aluminum brick layer, and a corundum brick layer; the insulation brick layer and the clay brick layer are arranged from the outside to the inside around the inner ring of the H-shaped steel, the high-aluminum brick layer is in the inner middle and upper part of the clay brick layer, and the corundum brick layer is in the inner lower part of the clay brick layer.

[0008] Furthermore, the brick layer also includes an aluminum silicate insulation felt layer, and the aluminum silicate insulation felt layer is located outside the insulation brick layer.

[0009] Furthermore, the return water pipeline of the inlet and outlet water pipes is installed with a relief valve.

[0010] The beneficial effects of adopting the above technical scheme are: the utility model has a simple structure and is easy to construct. The high-temperature liquid vanadium pentoxide forms a protective layer on the masonry furnace bottom. The masonry melting furnace bottom is resistant to impact and erosion, which can improve product quality and produce aviation-grade vanadium pentoxide tablets; the utility model can avoid continuous damage to the refractory materials at the furnace bottom, effectively extend the life of the furnace bottom of the melting furnace, reduce production costs, and improve product quality. The silicon content of the vanadium pentoxide tablets produced is less than 0.04%, the iron content is less than 0.05%, and the aluminum content is less than 0.05%, which meets the silicon, iron, and aluminum index requirements for aviation tablets; the vanadium pentoxide products produced can be upgraded, the product competitiveness can be enhanced, and there are significant economic and social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0012] Figure 1 It is a structural schematic diagram of the utility model;

[0013] Figure 2 It is a structural schematic diagram of the bottom of the utility model.

[0014] In the figure: inlet and outlet water pipes 1; square steel pipes 2; I-beams 3; steel plates 4; H-shaped steels 5; channel steels 6; tensioning devices 7; aluminum silicate insulation felt layers 8; insulation brick layers 9; clay brick layers 10; high-alumina brick layers 11; and corundum brick layers 12. DETAILED DESCRIPTION

[0015] Figure 1 , Figure 2As shown, the furnace bottom structure of the vanadium pentoxide melting furnace includes H-shaped steel 5, channel steel 6, steel plate 4, I-shaped steel 3, square steel pipe 2, water inlet and outlet pipe 1 and brick layer; the brick layer includes insulation brick layer 9, clay brick layer 10, high aluminum brick layer 11, and corundum brick layer 12. The bottom of the furnace bottom is supported by channel steel 6, and a plurality of channel steels 6 are arranged in parallel in one row or a plurality of rows. There may be gaps between adjacent channel steels 6, and the arranged channel steels 6 match the size of the furnace bottom. The steel plate 4 is laid on the upper part of the channel steel 6 and fixed to the channel steel 6. There are a plurality of H-shaped steels 5, which are vertically fixed around the upper part of the steel plate 4, forming a circle and matching the size of the furnace bottom, and fixed to the steel plate 4; the H-shaped steels 5 are preferably evenly and symmetrically arranged around the upper part of the steel plate 4, and the lower and upper parts of the two opposite H-shaped steels 5 are tightened and fixed by the tensioning device 7.

[0016] Figure 1 , Figure 2 As shown, the bottom structure of the vanadium pentoxide melting furnace has a plurality of I-beams 3, which are arranged in parallel in one or several rows, and preferably there are gaps between adjacent I-beams 3 for heat dissipation; the arranged I-beams 3 are fixedly connected to the steel plate 4 and are located between the H-shaped steels 5 that form a circle. A plurality of square steel pipes 2 are installed and arranged above the I-beams 3, which are arranged in parallel in one or several rows, and there are no gaps between adjacent square steel pipes 2, and the square steel pipes 2 are fixedly connected to the corresponding I-beams 3; the inlet and outlet water pipes 1 are installed in the square steel pipes 2, and the inlet and outlet water pipes 1 are connected with circulating cooling water, and the return water pipes of the inlet and outlet water pipes 1 are installed with a relief valve; the square steel pipes 2 are installed on the I-beams 3, and below the square steel pipes 2, except for the support of the I-beams 3, there are gaps, which are convenient for air flow and heat dissipation, and are conducive to the heat dissipation of the square steel pipes 2 connected with circulating cooling water.

[0017] Figure 1 , Figure 2 As shown, the bottom structure of the vanadium pentoxide melting furnace has a corundum brick layer 12 built on the upper part of the square steel tube 2 to form the bottom corundum brick layer. The brick layer includes an aluminum silicate insulation felt layer 8, an insulation brick layer 9, a clay brick layer 10, a high-aluminum brick layer 11, and a corundum brick layer 12; the brick layer is built around the inner circle of the H-shaped steel 5, and from the outside to the inside, the aluminum silicate insulation felt layer 8, the insulation brick layer 9, and the clay brick layer 10 are sequentially included, the high-aluminum brick layer 11 is in the inner middle upper part of the clay brick layer 10, and the corundum brick layer 12 is in the inner lower part of the clay brick layer 10 and is connected to the bottom corundum brick layer as an integrated structure.

[0018] After adopting such a structure, the channel steel 6 is used as a support, the steel plate 4 is used to connect the I-beam 3, and the H-shaped steel 5 is used to connect the entire structure into an integrated stable structure. The temperature is cooled by the return water pipeline in the square steel pipe 2, and the I-beam 3 and the gap between them are used to further dissipate heat. A vanadium pentoxide protective layer can be effectively formed on the masonry furnace bottom, thereby improving the impact and erosion resistance of the melting furnace bottom.

Claims

1. A vanadium pentoxide melting furnace bottom structure, characterized in that: It comprises H-shaped steel (5), channel steel (6), steel plate (4), I-shaped steel (3), square steel pipe (2), water inlet and outlet pipes (1) and a brick layer; the bottom of the furnace bottom is supported by a plurality of channel steels (6) arranged in a row, and a steel plate (4) is laid on the upper part of the channel steel (6); the H-shaped steel (5) has a plurality of pieces, which are vertically fixed around the upper part of the steel plate (4) to form a circle; a plurality of I-shaped steels (3) are installed and arranged on the steel plate (4) between the H-shaped steels (5), and a plurality of square steel pipes (2) are installed and arranged above the I-shaped steels (3); the water inlet and outlet pipes (1) are installed in the square steel pipes (2), and the water inlet and outlet pipes (1) are connected to circulating cooling water; the brick layer is built around the inner circle of the H-shaped steel (5), and a corundum brick layer (12) is built on the upper part of the square steel pipe (2).

2. The bottom structure of a vanadium pentoxide melting furnace according to claim 1, characterized in that: The H-shaped steels (5) are symmetrically arranged around the upper part of the steel plate (4), and the opposite H-shaped steels (5) are tightened and fixed by means of a tightening device (7).

3. The bottom structure of a vanadium pentoxide melting furnace according to claim 1, characterized in that: The brick layers include a thermal insulation brick layer (9), a clay brick layer (10), a high-alumina brick layer (11), and a corundum brick layer (12); the thermal insulation brick layer (9) and the clay brick layer (10) are arranged in order from the outside to the inside around the inner circle of the H-shaped steel (5); the high-alumina brick layer (11) is located in the middle and upper part of the clay brick layer (10), and the corundum brick layer (12) is located in the lower part of the clay brick layer (10).

4. The bottom structure of a vanadium pentoxide melting furnace according to claim 3, characterized in that: The brick layer also includes an aluminum silicate thermal insulation felt layer (8), and the aluminum silicate thermal insulation felt layer (8) is located outside the thermal insulation brick layer (9).

5. A vanadium pentoxide melting furnace bottom structure according to any one of claims 1 to 4, characterized in that: The return water pipeline of the inlet and outlet water pipes (1) is equipped with a relief valve.

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