CN203231639U - Can-type calcinator flame path structure - Google Patents

Abstract

The utility model relates to a flue channel structure of a downstream and countercurrent tank type calciner. The fire path structure of the tank type calciner includes the material tank and the fire path. The width of the material tank gradually increases from the first layer of bricks to the top of the fourth layer of bricks, and the width of the fire path from the first layer of the fire path to the third layer of the fire path gradually decreases. . Advantages and effects of the utility model: the utility model changes the traditional straight up and down tank structure, and also changes the structure of all fire channels having the same width. With the increase of single tank production capacity of the tank furnace, the size of the material tank increases, the structure of the material tank is narrow at the top and wide at the bottom, the mass flow rate of volatile matter increases, and the cross-sectional area of the first few layers of fire channels increases accordingly. But the flow area is also increased, so the flow rate can be controlled, so the material in the tank gets more energy per unit time, and the volatile matter escapes in a timely manner, which greatly reduces the possibility of coking and blasting, and improves production stability.

Description

Tank calciner flue structure

technical field

The utility model relates to a fire passage structure, in particular to a forward flow and counterflow tank type calciner fire passage structure for producing aluminum anodes, cathodes, electrodes and carbon graphitization materials in the carbon industry.

Background technique

With the westward movement of domestic electrolytic aluminum production capacity, the western region mainly in Xinjiang has vigorously developed electrolytic aluminum in the past two years, and the current of electrolytic cells has gradually increased, and the quality and production capacity requirements of prebaked anodes have gradually become stricter. At the same time, a number of enterprises have successively put into production the electrolytic aluminum industry, the market competition has become increasingly fierce, and cost has become the primary task of modern factory control. In terms of raw materials, the reserves of petroleum coke in the western region are not sufficient, which can only meet domestic sales in the past few years, so the price of petroleum coke is rising day by day; at the same time, with the production of the upstream petroleum industry, the powder of petroleum coke raw materials is gradually increasing. During the calcination process, the burning loss becomes larger and larger. Therefore, the production capacity of modern electrolytic aluminum supporting carbon plants or separate prebaked anode plants is expanding, and costs are being reduced, so large tank furnaces are used for calcination.

The pot calciner adopts the indirect heating mode. After the raw material enters the material tank, the temperature gradually rises, and the moisture is precipitated first, and then the volatile matter is precipitated at the position of the first layer of fire channel. The volatile matter in the raw material cannot escape in time at the upper part of the material tank. After the raw material enters the calcination zone, the volatile matter is not discharged smoothly, thermally decomposes in the tank, and deposits on the tank wall to easily generate pyrolytic carbon or carbon black, resulting in scarring on the tank wall . At the same time, if part of the volatile matter is brought to the lower part of the material tank, the phenomenon of "blasting" will occur when encountering the leaked air. And now that enterprises are gradually using large tank furnaces, the volatile matter that escapes per unit time increases. If the traditional fire path mode is still used, the cross-sectional area does not increase, and the above phenomenon will be more serious, which cannot meet the production of modern enterprises. Therefore it is imperative to improve the flue structure.

Contents of the invention

The utility model proposes a tank-type calciner flue structure in order to solve the above problems, and aims to further improve production stability and production capacity while ensuring quality.

In order to achieve the above-mentioned purpose, the fire channel structure of the tank type calciner of the present utility model includes a material tank and a fire channel. The width of the fire path gradually decreases.

The width of the material tank at the position of pulling bricks from the top of the fourth layer to the position of pulling bricks at the bottom is the same as the width of the material tank at the position of pulling bricks at the top of the fourth layer.

The width of the fire path from the fourth layer of fire path to the bottom layer of fire path is the same as the width at the bottom of the third layer of fire path.

The bottom fire path is the eighth floor fire path or the tenth floor fire path.

Adjacent fire passages are separated by silica bricks, and silica bricks are used between the tank and fire passages.

The distance between the center planes of adjacent material tanks is equal from the first layer of fire path to the bottom layer of fire path.

The cross section of the fire path from the first layer to the third layer is an inverted trapezoid.

Advantages and effects of the utility model: the utility model changes the traditional straight up and down tank structure, and also changes the structure of all fire channels having the same width. With the increase of single tank production capacity of the tank furnace, the size of the material tank increases, the structure of the material tank is narrow at the top and wide at the bottom, the mass flow rate of volatile matter increases, and the cross-sectional area of the first few layers of fire channels increases accordingly. However, the flow area is also increased, so the flow rate can be controlled, so the energy obtained by the material in the tank per unit time is greater, and the volatile matter escapes in a timely manner, which greatly reduces the possibility of coking and blasting, and improves production stability. The structure of the fire channel and the material box can well adapt to the combustion and heat transfer of the large mass flow rate of volatile matter produced by the large tank furnace.

Description of drawings

Fig. 1 is a partial sectional view of the utility model fire path.

Fig. 2 is a partial cross-sectional view of the tank of the utility model.

In the figure: 1. The fire path on the first floor; 2. The fire path on the third floor; 3. The bricks on the first floor; 4. The bricks on the top of the fire path on the fourth floor; Pull bricks at the bottom of the four-story fire path; 8. The fourth-story fire path.

Detailed ways

The utility model is described in further detail below in conjunction with the examples, but the protection scope of the utility model is not limited by the examples.

As shown in the figure, the fire path structure of the tank type calciner of the utility model includes a material tank 5 and a fire path. The fire path width from path 1 to fire path 2 on the third floor gradually decreases. The width of the material tank 5 at the brick 4 position at the top of the fourth floor fire path to the brick 7 at the bottom of the fourth floor fire path is the same as the width of the material tank 5 at the brick 4 position at the top of the fourth floor fire path. The width of the fire path from the fourth floor fire path 8 to the bottom fire path 6 is the same as the width at the bottom of the third layer fire path 2 . The cross section of the fire path from the first layer to the third layer is an inverted trapezoid, and the length and height of the fire path from the first layer to the third layer are unchanged.

The bottom fire path 6 is the eighth floor fire path or the tenth floor fire path.

Adjacent fire passages are separated by silica bricks, and silica bricks are used between the tank and fire passages.

The distance between the center planes of adjacent material tanks is equal from the first layer of fire path to the bottom layer of fire path.

The material tank 5 gradually precipitates volatile matter during the heating process, mainly between the first layer of fire path 1 and the third layer of fire path 2, and the volatile matter flows to the circuitous fire path through the volatile matter channel, in the fire path and from the bottom of the furnace. The incoming preheated air mixes and starts to burn, indirectly heating the raw materials in the material tank, and finally the high-temperature flue gas flows to the concentrated flue, and the material in the material tank is discharged after being calcined.

Claims (7)

1. The fire path structure of the tank type calciner, including the material tank and the fire path, is characterized in that the width of the material tank gradually increases from the first layer of bricks to the top of the fourth layer, and the width of the first layer of the fire path to the third layer of the fire path The width of the fire path gradually decreases. 2. The tank-type calciner fire path structure according to claim 1, characterized in that the width of the material tank at the position from the top of the fourth layer to the bottom of the brick is the same as the width of the material tank at the position of the fourth layer of top brick. 3. The tank-type calciner fire path structure according to claim 1, characterized in that the width of the fire path from the fourth layer to the bottom layer of the fire path is the same as the width of the bottom of the third layer of fire path. 4. The tank type calciner fire path structure according to claim 3, characterized in that the bottom fire path is the eighth floor fire path or the tenth floor fire path. 5. The tank-type calciner fire path structure according to claim 1, characterized in that adjacent fire paths are separated by silica bricks, and silica bricks are used between the material tank and the fire path. 6. The tank-type calciner fire path structure according to claim 1, characterized in that the distance between the center planes of adjacent material tanks is equal from the first floor fire path to the bottom fire path. 7. The tank-type calciner fire path structure according to claim 1, characterized in that the cross section of the fire path from the first layer to the third layer is an inverted trapezoid.

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