WO2013177952A1

WO2013177952A1 - Large downstream tank type incinerator

Info

Publication number: WO2013177952A1
Application number: PCT/CN2013/000645
Authority: WO
Inventors: 周善红; 崔银河; 孙毅; 刘朝东; 吕博; 王敏
Original assignee: 中铝国际工程股份有限公司
Priority date: 2012-05-31
Filing date: 2013-05-31
Publication date: 2013-12-05
Also published as: MY185889A; CN202609945U

Abstract

A large downstream tank type incinerator; a volatile material concentration channel (2) is arranged above a material tank (1); a front wall is provided with a front wall volatile material vertical channel (3) therein; a back wall is provided with a back wall volatile material vertical channel (4) therein; the front wall volatile material vertical channel (3) communicates with the volatile material concentration channel (2) and a first layer flame path (5); a pulling plate is arranged at the inlet of a bottommost layer flame path (5); the back wall volatile material vertical channel (4) communicates with the volatile material concentration channel (2), a second layer flame path (5) and a fourth layer flame path (5); a volatile material pulling plate is arranged at the inlets of the second layer flame path (5) and the fourth layer flame path (5); the bottommost layer flame path (5) is provided with preheated air channels (8) therebelow; one preheated air channel is connected to the first layer flame path (5), and an adjacent preheated air channel is connected to the fourth layer flame path (5); the bottommost layer flame path (5) communicates with a flue (13); the material tank (1) is provided with a cooling water jacket (21) therebelow; the flame paths (5) are a total of eight layers, and each layer flame path (5) communicates with the next in a circuitous manner; and the height of each flame path (5) is 680 mm. Therefore, the size of the material tank is increased while reasonably increasing the height of the flame path, increasing the sectional area of the flame path, and greatly ensuring product quality.

Description

Large-scale downstream tank calciner

The utility model relates to a tank type calcining furnace, in particular to a large-scale downstream tank type calcining furnace for producing an anode, a cathode, an electrode and a carbon graphitized material for aluminum in the carbon industry.

Background technique

As the capacity of modern carbon companies continues to increase, especially in large electrolytic aluminum plants and electrode plants, the production capacity of carbon products continues to increase. Calcination is the first step in the anode product. The quality of the calcined coke determines the quality of the anode to a large extent. At present, the calcining equipment commonly used in the market is a rotary kiln and a downstream tank furnace. However, in the past two years, the cost of raw materials has been greatly improved. The downstream tank furnace has gradually dominated the market due to its high calcination quality and low burning loss. However, most of the tank furnaces in the market currently have a low capacity of single tanks, and the net displacement is about 85kg/h. What is more important is that the tank furnace machinery cannot be enlarged for increasing production capacity. For example, after the tank is increased, the fire lane will be The number of layers is also mechanically increased. This method not only makes the fire channel more likely to clog and coke, it is not conducive to the production operation, but also reduces the quality of the calcined coke or the actual production does not meet the design standards.

At present, the tank furnace fire channel structure on the market is almost all of the 476 X 215 mm ² fire tunnel. This kind of fire tunnel structure is not suitable for large tank furnaces, so it is sought to ensure quality and quality. Large tank furnaces that increase production are imperative.

Utility model content

The utility model relates to a large-scale downstream flow tank calcining furnace which is proposed to solve the above problems. The purpose is that after the large-scale electrolytic aluminum plant is large, the corresponding prebaked anode factory can meet the capacity requirement of the large-scale electrolytic cell series.

In order to achieve the above object, the utility model provides a large-scale downstream flow tank type calcining furnace, which comprises a material tank, a fire channel, a front wall and a rear wall which are arranged on both sides of the material tank, and a volatile concentration channel is arranged above the material tank, The front wall has a front wall volatile vertical channel, and the rear wall has a rear wall volatile vertical channel.

In other aspects of the present application, the front wall volatiles vertical passage connects the volatile concentration passage and the first layer fire passage, and the volatile layer pull plate is arranged at the entrance of the bottommost fire passage, and the volatile wall of the rear wall is connected to the volatile concentration passage and The second layer of fire and the fourth layer of fire are provided with a volatile pull plate at the entrance of the second and fourth fire channels, and a preheated air passage below the bottom fire channel, one of which The preheating air passage is connected to the first fire channel, the adjacent preheating air passage is connected to the fourth layer fire passage, the bottom fire passage is connected with the flue, and the cooling water jacket is arranged below the tank, the fire passage is 8 layers, each layer of fire The turnout is connected, and the height of each fire channel is 680mm. In another aspect of the application, each layer of fireway height includes a layer of brick height, and the height of the brick is

68mm.

In yet another aspect of the present application, each layer of the fire track is separated by silicon.

In still another aspect of the present application, the tank is a rectangular parallelepiped having a horizontal section size of 2180 X 360 mm and a height direction of 7864 mm; two tanks being one row, four tanks being one set, and one row of tanks being on both sides Each group distributes a group of fire tracks.

In yet another aspect of the present application, the inlet of the preheated air passage is disposed within the rear wall.

In still another aspect of the present application, the insulating bricks of the front wall and the rear wall are silicon bricks, fire resistant clay bricks, lightweight high alumina bricks, and red bricks from the inside out.

Advantages and Effects of the Invention: The utility model increases the length and height of the tank on the basis of the original tank furnace, and the production capacity is increased by 50% on the original basis, which means that the volatile matter and the combustion air mass flow rate are increased to The original 1.5 times, the mass flow of flue gas in the fire channel increased to 2.25 times, and the single tank capacity reached 130kg/h. The original cross section of the fire channel is 476 χ 215mm ² , which is too narrow for the existing flue gas flow. If the original fire channel structure is still used, the volatile coking will be serious, which is not conducive to production, and the flue gas flow rate increases. More than double, the heat transfer efficiency becomes lower, the heat transfer amount becomes smaller, and the product quality deteriorates. In addition, the height of the ten-layer fire passage adopts eight-layer fire passage arrangement, which increases the single-layer fire passage height, which not only increases the heat transfer area of the single-layer fire passage, but also improves the heat transfer efficiency and increases the smoke flow interception. Area, to ensure a larger flue gas volume can have a suitable flue gas flow rate; it is important that the number of airflow detours is not increased, thereby reducing the negative pressure loss.

DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a cross-sectional view of a portion of a fire track of the present invention

Figure 2 is a partial cross-sectional view of the material tank of the present invention.

In the figure: 1, the tank; 2, the volatile concentration channel; 3, the front wall volatile vertical channel; 4, the rear wall volatile vertical channel; 5, the fire track; 6, the front wall preheated air vertical road; Preheated air vertical channel on the back wall; 8. Preheated air passage; 9. Silica brick; 10. Refractory clay brick; 1 1. Lightweight high alumina brick; 12. Red brick; 13. Flue; 14. Cooling water jacket .

detailed description

The present invention will be further described in detail below with reference to the embodiments, but the scope of protection of the present invention is not limited by the embodiments.

As shown in the figure, the large-scale downstream flow tank type calcining furnace of the utility model comprises a material tank 1, a fire channel 5, a front wall and a rear wall which are arranged on both sides of the material tank, and a volatile concentration channel 2 is arranged above the material tank 1 Front wall There is a front wall volatile vertical channel 3, a rear wall with a volatile wall vertical channel 4, a front wall volatile vertical channel 3 connected to the volatile concentration channel 2 and a first layer fire channel 5, and a rear wall volatile vertical channel 4 connected to the volatile concentration channel 2 and the second layer of the fire channel 5 and the fourth layer of the fire channel 5, at the entrance of the second layer of the fireway 5 and the fourth layer of the fireway 5 are provided with a volatile pull plate, at the bottom A preheating air passage 8 is provided below the fire channel 5, and the bottom fire channel 5 is connected to the flue 13 and a cooling water jacket 14 is disposed below the material tank 1. The fire channel of the embodiment is 8 layers, and the height of each layer of the fire channel is 680 mm. The height of each layer of fire includes a height of one layer of brick (or called a brick), and the height of the brick is 68mm. Each layer of fire is connected back and forth, and each layer of fire is separated by silicon bricks. The pull brick is a kind of refractory brick, and the flow rate is controlled by controlling the flow cross section of the volatile matter in the volatile passage, which is actually consistent with the gate action.

The tank 1 is a rectangular parallelepiped, and the tank 1 has a horizontal section size of 2180 x 360 mm and a height direction of 7864 mm; two tanks 1 are one row, four tanks 1 are a group, and one row of tanks 1 is distributed on each side. Group fire channel 5; the inlet of the preheating air passage 8 is located in the rear wall; the insulation bricks of the front wall and the rear wall are silicon bricks 9, refractory clay bricks 10, lightweight high alumina bricks 1 1 and red from the inside to the outside. Brick 12.

The volatile concentration channel is used to escape the volatile matter discharged from the material, and is a volatile connecting channel between the tank and the volatile vertical channel, and the volatile concentrated channel connects the upper space of the two tanks in a row.

The preheating air passage 8 is used to preheat the combustion air, which cools the material and preheats the combustion air. The preheating air passage 8 communicates with the front wall preheating air passage 6, and the adjacent preheating air passages are folded back through the front wall and then communicate with the rear wall preheating air vertical passage 7 to enter the first layer and the fourth layer respectively. Road.

The cooling water jacket is a steel structure heating pipe, and the cooling water jacket is provided with pressurized cooling circulating water, and the high temperature material is cooled after passing through the cooling water jacket.

Claims

Rights request

1. Large-scale downstream tank calciner, comprising a tank, a fire channel provided on both sides of the tank, a front wall and a rear wall, characterized in that a volatile volatile passage is arranged above the tank, and the front wall is provided with a front The wall has a volatile vertical channel and a rear wall with a volatile vertical channel.

2. The large-scale downstream tank calciner according to claim 1, wherein the tank is a rectangular parallelepiped, the horizontal section of the tank is 2180 x 360 mm, and the height direction is 7864 mm; the two tanks are in a row, four The tanks are a group, and a set of fire channels are distributed on each side of the discharge tank.

3. The large-scale downstream tank calciner according to claim 1, wherein the fire passage is 8 layers, and each layer of the fire passage is connected to each other, and the height of each layer of the fire passage is 680 mm.

4. The large-scale downstream tank calciner according to claim 3, characterized in that each layer of the fireway height comprises a layer of brick height and the height of the brick is 68 mm.

5. A large-scale, forward-flow can calciner according to claim 3 wherein each of said fire channels is separated by a silicon brick.

6. The large-scale downstream tank calciner according to claim 1, wherein the front wall circulates a vertical passage connecting the volatile concentration passage and the first layer fire passage.

7. A large-scale downstream tank calciner according to claim 6, wherein the vertical passage leading to the first floor fire passage is provided with a volatile pull plate.

8. The large-scale downstream tank calciner according to claim 1, wherein the rear wall circulates a vertical passage connecting the volatile concentration passage and the second layer fire passage and the fourth layer fire passage.

9. The large-scale downstream tank calciner according to claim 8, wherein the second layer of the fire channel and the fourth layer of the fire channel are each provided with a volatile pull plate.

10. The large-scale downstream tank calciner according to claim 1, wherein a draw plate is provided at the entrance of the eighth layer of the fire passage for regulating the negative pressure of the entire fire passage.

A large-scale downstream tank type calciner according to claim 1, wherein the eighth layer of the fire passage is in communication with the flue, and a cooling water jacket is disposed below the tank.

The large-scale downstream tank calciner according to claim 1, characterized in that a preheating air passage is provided below the eighth layer of the fire passage.

A large-scale co-current can calciner according to claim 12, wherein the inlet of the preheated air passage is provided in the rear wall.

14. The large-scale downstream tank calciner according to claim 12, wherein one of the preheating air passages connects the first layer of the fire passage from the rear wall to the front wall through the vertical passage, and the adjacent preheating The air passage is folded back from the rear wall to the front wall and the rear wall is connected to the fourth fire passage through the vertical passage.

15. The large-scale downstream tank calciner according to claim 1, wherein the front and rear wall insulation bricks are silicon bricks, refractory clay bricks, lightweight high alumina bricks from inside to outside, and Red brick.