CN104357066B - Small flue structure with multiple independently controllable airflow channels - Google Patents

Abstract

The invention relates to a small flue structure with a plurality of independently controllable airflow channels, which comprises a small flue consisting of a regenerator main wall and a regenerator single wall, wherein the inside of the small flue is divided into a plurality of layers along the height direction, a small flue transverse partition wall is arranged in the middle of each layer, the airflow channels consisting of small flue lining bricks, small flue horizontal partition walls/small flue bottom laying bricks and small flue transverse partition walls are respectively communicated with the regenerator cells to form independent airflow channels, and an adjusting device is arranged at the inlet of each airflow channel. Compared with the prior art, the invention has the beneficial effects that: 1) the small flue is divided to form a plurality of gas channels, so that the lean gas/air for heating the coke oven is accurately controlled in gas flow distribution at the outside, and the uniformity and the accuracy of the long-direction temperature distribution of the combustion chamber are improved; 2) automatic control can be realized, the operating environment is improved, and the labor intensity is reduced; 3) the quantity of the combustion-supporting gas entering each regenerator cell can be accurately regulated, the energy utilization rate is improved, and the energy is saved and the consumption is reduced.

Description

Small flue structure with multiple independently controllable airflow channels

technical field

The invention relates to the technical field of combustible gas and air side-entry coke ovens, in particular to a small flue structure with a plurality of independently controllable air flow channels.

Background technique

With the development of large-scale coke ovens, the height of the coke oven combustion chamber-coking chamber is getting higher and higher, and the thickness of the corresponding furnace roof is also increasing. It is becoming more and more difficult to adjust from the furnace roof, and it is even impossible to adjust . In addition, due to the high temperature at the top of the furnace, the adjustment tools that can work normally at an environment above 1300 ° C have become the bottleneck of the development of this traditional adjustment method, so it is difficult to realize the longitudinal adjustment of the coke oven on the top of the furnace.

Although the "M" type coke oven of Japan's Nippon Steel Corporation has realized the method of accurately controlling the gas volume by the external orifice system, because the intake pipe protrudes from the grate brick, the corrosion is serious, and the pipe needs to be replaced in about 5 years. It is quite wasteful to replace the pipeline, and the air supply method in this adjustment method adopts the forced blast method, which has high production cost, high positive pressure of the furnace top fire channel, and difficult temperature measurement. In addition, this adjustment method has disadvantages such as being unable to control the air flow distribution along the coke oven length.

At present, the coke oven lowering method commonly used in China is to adopt the structure of grate brick-regulating brick, and adjust the opening of the adjustable hole of the grate brick by adjusting the thickness of the regulating brick to realize the air distribution control along the direction of the coke side of the machine. However, the disadvantage of this method is that the workload is large, and the dust pollution is heavy when the adjustment hole is opened due to the deposition of dust such as blast furnace dust, and the working environment of the workers is poor.

See Figure 1, which is a schematic diagram of the commonly used small flue structure at present. The main structure of the small flue is composed of the main wall 6 of the regenerator and the single wall 7 of the regenerator, and the middle part is formed by the lining brick 4 of the small flue. The air flow channel and the regenerator are separated and adjusted by grate bricks. This structure cannot independently adjust the gas flow into the small cells of the regenerator.

Contents of the invention

The present invention provides a small flue structure with a plurality of independently controllable air flow passages, which can precisely control the gas flow distribution of the lean coal gas/air used for heating the coke oven, and improve the uniformity of the temperature distribution in the long direction of the combustion chamber. and accuracy; the invention is convenient and precise to adjust, and can realize automatic control, improve the operating environment, reduce labor intensity, and improve work efficiency and safety.

In order to achieve the above object, the present invention adopts the following technical solutions to realize:

There are multiple small flue structures that can independently control the air flow channels, including the small flue composed of the main wall of the regenerator and the single wall of the regenerator. The interior of the small flue is divided into several layers along the height direction, and a small smoke is arranged in the middle of each layer The horizontal partition wall of the flue, the air flow channel composed of the small flue lining brick, the small flue horizontal partition wall/small flue bottom brick, and the small flue horizontal partition wall is respectively connected with the small cells of the regenerator to form an independent air flow channel, each Adjusting devices are provided at the inlets of the airflow passages.

The small flue horizontal partition walls are arranged in steps from top to bottom corresponding to the small partition walls of the regenerator along the gas inflow direction, and the small flue horizontal partition walls on both sides of the same floor are arranged at intervals.

The horizontal partition wall of the small flue is connected to the small partition wall of the regenerator through the small partition wall of the small flue at the corresponding small partition wall of the regenerator, and the small flue lining brick and the small partition wall of the small flue /Small partition wall of regenerator/central partition wall of heating system, horizontal partition wall of small flue/bottom brick of small flue to form gas buffer chamber.

The regulating device is a manual regulating flap valve or an automatic flap valve.

Compared with prior art, the beneficial effect of the present invention is:

1) By separating the small flue to form multiple gas channels, the lean coal gas/air used for heating the coke oven can be precisely controlled by gas volume splitting outside, which improves the uniformity and accuracy of the temperature distribution in the long direction of the combustion chamber;

2) It can realize automatic control, improve the operating environment, reduce labor intensity, and improve work efficiency and safety;

3) The gas flow into each regenerator cell can be precisely adjusted to improve energy utilization, save energy and reduce consumption.

Description of drawings

Figure 1 is a schematic diagram of the structure of a commonly used small flue.

Fig. 2 is a structural schematic diagram of the present invention.

Fig. 3 is A-A sectional view of Fig. 2;

Fig. 4 is the B-B sectional view of Fig. 2;

In the figure: 1. Small flue horizontal partition wall 2. Small flue horizontal partition wall 3. Small flue small partition wall 4. Small flue lining brick 5. Small flue bottom brick 6. Main wall of regenerator 7. Single wall of regenerator 8. Airflow buffer chamber 9. Small flue airflow channel 10. Adjusting device 11. Central partition wall of heating system 12. Small partition wall of regenerator

detailed description

The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing:

See Fig. 2-Fig. 4, which are structural schematic diagrams of the present invention. The present invention has a plurality of small flue structures that can independently control the airflow channels, including a small flue composed of the main wall 6 of the regenerator and the single wall 7 of the regenerator. , the interior of the small flue is divided into several layers along the height direction, and a small flue horizontal partition wall 2 is set in the middle of each layer, which consists of small flue lining bricks 4, small flue horizontal partition walls 1/ small flue bottom bricks 5, small flue The airflow passages 9 formed by the transverse partition walls 2 communicate with the cells of the regenerator respectively to form independent airflow passages, and each airflow passage 9 is provided with an adjustment device 10 at the entrance.

The small flue horizontal partition wall 1 is arranged in steps from top to bottom corresponding to the small partition wall 12 of the regenerator along the gas inflow direction, and the small flue horizontal partition walls 1 on both sides of the same floor are arranged at intervals.

The small flue horizontal partition wall 1 is connected with the small partition wall 12 of the regenerator by the small partition wall 3 of the small flue corresponding to the small partition wall 12 of the regenerator, and the small flue lining brick 4, small Flue small partition wall 3/regenerator small partition wall 12/heating system central partition wall 11, small flue horizontal partition wall/1 small flue bottom brick 5 to form a gas buffer chamber.

The regulating device 10 is a manual regulating flap valve or an automatic flap valve.

The present invention has a plurality of small flue structures that can independently control the air flow passages, and separates the small flues from the height and the longitudinal direction, so that each regenerator cell has a separate air passage 9 to communicate with, and can be used in small The lean coal gas or air inlet outside the flue is provided with an adjustment device 10 for separate adjustment, which is easy to realize automatic adjustment and solves the problem of coke oven length adjustment.

The following examples are carried out on the premise of the technical solutions of the present invention, and detailed implementation methods and specific operation processes are provided, but the protection scope of the present invention is not limited to the following examples. The methods used in the following examples are conventional methods unless otherwise specified.

【Example 1】

See Fig. 2, which is a schematic structural diagram of this embodiment. The small flue is composed of the main wall 6 of the regenerator and the single wall 7 of the regenerator. The flue transverse partition wall 2 divides it into 2 small rooms in the middle. See Figure 3, which is the A-A sectional view of Figure 2. It can be seen along the coke oven length that the uppermost small flue horizontal partition wall 1 is laid to the second regenerator small partition wall 12 near the entrance of the small flue. The second layer of small flue horizontal partition wall 1 is laid to the fourth regenerator small partition wall 12, and so on. Set, the small flue horizontal partition wall 1 is stepped in the sectional view. See Fig. 4, which is the B-B sectional view of Fig. 2. It can be seen along the coke oven length that the uppermost small flue horizontal partition wall 1 is laid to the first regenerator small partition wall 12 near the entrance of the small flue. The horizontal partition wall 1 of the second layer of small flue is laid to the small partition wall 12 of the third regenerator, and so on. Setting, in the sectional view, the horizontal partition wall 1 of the small flue is also stepped.

Lean gas or air enters the small flue through the regulating valve 10 from the entrances of multiple airflow passages, enters the corresponding regenerator cell along the airflow passage 9 and reaches the vertical fire passage to participate in combustion, and adjusts the flow rate of the airflow passage inlet regulating valve 10, that is The gas flow into each regenerator cell can be individually controlled, thereby realizing the lengthwise adjustment of the coke oven.

Claims (4)

1. There are multiple small flue structures that can independently control the airflow channels, including the small flue composed of the main wall of the regenerator and the single wall of the regenerator. It is characterized in that the interior of the small flue is divided into several layers along the height direction, There is a small flue horizontal partition wall in the middle of each floor, and the air flow channel composed of small flue lining bricks, small flue horizontal partition walls/small flue bottom bricks, and small flue horizontal partition walls is respectively connected to the small cells of the regenerator. Independent air flow channels, each air flow channel inlet is equipped with an adjustment device. 2. The small flue structure with a plurality of independently controllable air flow passages according to claim 1, characterized in that the horizontal partition wall of the small flue corresponds to the small partition wall of the regenerator along the gas inflow direction from top to bottom. The bottom is set in steps, and the horizontal partition walls of the small flues on both sides of the same floor are set at intervals. 3. The small flue structure with a plurality of independently controllable airflow passages according to claim 1, wherein the horizontal partition wall of the small flue passes through the small partition of the small flue at the small partition wall of the corresponding regenerator. The wall is connected with the small partition wall of the regenerator, and at the joint, there are small flue lining bricks, small flue partition wall/regenerator small partition wall/heating system central partition wall, small flue horizontal partition wall/small smoke The paving bricks form a gas buffer cavity. 4. The small flue structure with a plurality of independently controllable air flow passages according to claim 1, characterized in that the adjustment device is a manual adjustment flap valve or an automatic flap valve.