An adjustable coke oven inclined flue structure

Abstract

The present invention relates to an adjustable coke oven inclined flue structure, which includes flue one and flue two arranged side by side corresponding to the same vertical flue. A nose brick is provided between flue one and flue two; the nose brick is movably placed on the top of the inclined flue area masonry and can be replaced; the nose brick is provided with multiple specifications for standby at different heights. The present invention improves the nose brick from the conventional fixed structure to a movable structure. By replacing nose bricks of different specifications, the shape of the inclined flue opening and the distance between the top surface of the nose brick and the bottom surface of the vertical flue are changed, so as to ensure the high-level heating uniformity of the coke oven when different varieties of gas are used for heating.

Description

Technical Field

[0001] The present invention relates to the technical field of coke ovens, and in particular to an adjustable coke oven inclined orifice structure for heating a coke oven with coke oven gas or lean gas. Background Art

[0002] The inclined flue area of a coke oven is located between the top of the regenerator and the bottom of the combustion chamber, and is a passage connecting the regenerator and the combustion chamber. It is used to introduce air and gas, distribute them to each vertical flue, and discharge waste gas at the same time. The inclined flue area has many channels and the gas crisscrosses, making it the most complex part of the coke oven structure. Each vertical flue of the combustion chamber is connected to the corresponding inclined flue: when heating with coke oven gas, the coke oven gas is supplied by the gas pipe brick, and the two inclined flues corresponding to the same vertical flue are used to supply air or discharge waste gas at the same time; when heating with lean gas, in the two inclined flues corresponding to the same vertical flue, one inclined flue supplies gas and the other supplies air, and both inclined flues discharge waste gas after switching. Usually, regulating bricks are provided at the inclined orifice to adjust the size of the inclined flue opening area, and at the same time, flame regulating bricks (i.e., nose bricks) are provided to adjust the height of the gas and air mixing point.

[0003] For a coke oven heated with lean gas, changing the shape of the nose brick changes the included angle between the gas inlet and the air inlet, and at the same time changes the height of the gas and air mixing point; the wider or higher the width of the nose brick, the more difficult it is for the combustible gas and the combustion-supporting gas molecules to collide, the slower the combustion, and the longer the flame; conversely, the shorter the flame and the faster the combustion. Therefore, the structural design of the nose brick is one of the effective methods to improve the vertical heating performance of the coke oven.

[0004] The Chinese utility model patent with the authorization announcement number CN 205223094 U discloses "a bottom structure of a vertical flue for effectively reducing the generation of nitrogen oxides in a coke oven", which adopts a structure in which the combustible gas channel or the air channel located in front of the combustible gas inlet or the air inlet is arranged vertically or obliquely away from each other, and the distance between the combustible gas inlet and the air inlet is not less than 70 mm or the distance from the nose brick to the bottom of the vertical flue is not less than 80 mm; for a coke oven provided with regulating bricks, the regulating bricks are arranged closely on both sides of the nose brick. By the above specific structure, the mixing point of the combustible gas and air in the vertical flue is moved upward, delaying their mixing combustion; it can effectively reduce the size of the high-temperature area at the bottom of the vertical flue, reduce the maximum combustion temperature, reduce the generation of nitrogen oxides in the vertical flue, and reduce the emission of nitrogen oxides from the coke oven chimney at the source. However, its nose brick adopts a fixed structure, that is, it is fixedly connected to the inclined flue area masonry by fire clay, and after the inclined flue area is masonry completed, the nose brick cannot be replaced and adjusted. Summary of the Invention

[0005] The present invention provides an adjustable coke oven inclined flue structure, which improves the nose brick from the conventional fixed structure to a movable structure. By replacing nose bricks of different specifications, the shape of the inclined flue and the distance between the top surface of the nose brick and the bottom surface of the vertical flue are changed, so as to ensure the uniformity of the high-level heating of the coke oven when different varieties of gas are used for heating.

[0006] In order to achieve the above object, the present invention is implemented by the following technical solutions:

[0007] An adjustable coke oven inclined flue structure includes flue one and flue two arranged side by side corresponding to the same vertical flue. A nose brick is provided between flue one and flue two; the nose brick is movably placed on the top of the flue area masonry and can be replaced; the nose brick is provided with multiple specifications for standby according to different heights.

[0008] The distance between the top surface of the nose brick and the bottom surface of the vertical flue is -200 to 350 mm.

[0009] The upper part of the nose brick is of a cuboid structure, and the two side surfaces of the lower part are arc surfaces respectively extending outward and downward; the inclination angles of the arc surfaces of the nose bricks with different height specifications are different.

[0010] The upper part of the nose brick is provided with a hook hole for cooperating with a hook tool to realize the replacement of the nose brick.

[0011] Adjusting bricks are respectively provided on the sides of flue one and flue two far away from the nose brick. The adjusting bricks are provided with multiple specifications for standby according to different thicknesses.

[0012] The adjusting brick is positioned and fixed by means of shoulder platforms on both sides and is placed on the corresponding side of the flue area masonry.

[0013] The upper part of the adjusting brick is of a cuboid structure, and the outer side surface of the lower part is an arc surface extending inward and downward.

[0014] The upper part of the adjusting brick is provided with a hook hole for cooperating with a hook tool to realize the replacement of the adjusting brick.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] The nose brick is improved from the conventional fixed structure to a movable structure. By replacing nose bricks of different specifications, the shape of the inclined flue and the distance between the top surface of the nose brick and the bottom surface of the vertical flue can be changed, which can adapt to the characteristics of flame combustion when different varieties of gas are used in the coke oven, effectively adjust the uniformity of the high-level heating of the coke oven, improve the temperature difference and maturity difference between the upper and lower parts of the coke cake, improve the thermal efficiency of the coke oven, and save energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a structural schematic diagram of an adjustable coke oven inclined flue structure described in the present invention Figure 1。

[0018] Figure 2 is the structural schematic diagram of an adjustable coke oven inclined flue opening structure according to the present invention Figure 2 。

[0019] In the figure: 1. Flue 1; 2. Flue 2; 3 / 3'. Nose brick; 4. Hook hole; 5. Adjusting brick Detailed implementation manners

[0020] The following further describes the detailed implementation manners of the present invention with reference to the accompanying drawings:

[0021] As Figure 1 、 Figure 2 shown, an adjustable coke oven inclined flue opening structure according to the present invention includes a Flue 1 and a Flue 2 arranged side by side corresponding to the same vertical flue. A nose brick 3 is provided between the Flue 1 and the Flue 2. The nose brick 3 is movably placed on the top of the inclined flue area masonry and can be replaced. The nose brick 3 is provided with multiple specifications for standby according to different heights.

[0022] The distance between the top surface of the nose brick 3 and the bottom surface of the vertical flue is -200 to 350 mm.

[0023] The upper part of the nose brick 3 has a cuboid structure, and the two side surfaces of the lower part are arc surfaces extending outward and downward respectively. The inclination angles of the arc surfaces of the nose bricks 3 with different height specifications are different.

[0024] The upper part of the nose brick 3 is provided with a hook hole 4 for cooperating with a hook tool to realize the replacement of the nose brick 3.

[0025] Adjusting bricks 4 are respectively provided on the sides of the Flue 1 and the Flue 2 away from the nose brick 3. The adjusting bricks 4 are provided with multiple specifications for standby according to different thicknesses.

[0026] The adjusting brick 5 is positioned and fixed by being placed on the corresponding inclined flue area masonry through shoulder platforms on both sides.

[0027] The upper part of the adjusting brick 5 has a cuboid structure, and the outer side surface of the lower part is an arc surface extending inward and downward.

[0028] The upper part of the adjusting brick 5 is provided with a hook hole for cooperating with a hook tool to realize the replacement of the adjusting brick 5.

[0029] When a coke oven adopting an adjustable coke oven inclined flue opening structure according to the present invention is being built, the nose brick 3 is not fixed with fire clay but is in a dry-laying mode. When changing the heating gas variety, the corresponding specification of the nose brick 3 is replaced according to the gas property. Both the nose brick 3 and the adjusting brick 5 are replaced by hooking a hook tool to the hook hole 4.

[0030] The heights and thicknesses of the nose bricks 3 with different specifications are different (such asFigure 1 , Figure 2 As shown, the inclination angles of the arc-shaped surfaces on both sides are different. The nose brick 3 and the adjusting brick 5 together form the shape corresponding to the flue opening.

[0031] As Figure 1 shown, when lean gas is used for heating, due to the slow combustion speed and long flame of lean gas itself, the high-level heating uniformity is good, the coking high-level maturity is uniform, and there is no need for too high flame combustion height. Therefore, the nose brick 3 with a smaller height is adopted.

[0032] As Figure 2 shown, when coke oven gas is used for heating, due to the fast combustion speed and short flame of coke oven gas, the temperature in the lower part of the combustion chamber is higher than that in the upper part, the heating temperature difference of the coke cake in the high direction is large, and the temperature in the lower part of the coke cake is higher than that in the upper part, resulting in poor maturity of the upper coke due to insufficient heating. At this time, a nose brick 3' with a larger height and width is required to increase the height of the mixing point of coke oven gas and air, thereby increasing the gas combustion height at the bottom of the carbonization chamber and achieving the purpose of adjusting the high-level temperature uniformity.

[0033] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. An adjustable coke oven inclined flue structure, comprising flue one and flue two arranged side by side corresponding to the same vertical flue, and a nose brick is provided between flue one and flue two; characterized in that, The nose bridge brick can be movably placed on the top of the masonry in the ramp area and can be replaced; the nose bridge bricks are provided in multiple specifications for standby according to different heights; the distance between the top surface of the nose bridge brick and the bottom surface of the vertical flue is -200 to 350 mm; adjusting bricks are respectively arranged on one side of the first ramp and the second ramp away from the nose bridge brick, and the adjusting bricks are provided in multiple specifications for standby according to different thicknesses.

2. The adjustable coke oven inclined flue structure according to claim 1, characterized in that, The upper part of the nose bridge brick is of a cuboid structure, and the two side surfaces of the lower part are arc surfaces extending outward and downward respectively; the inclination angles of the arc surfaces of the nose bridge bricks with different height specifications are different.

3. The adjustable coke oven inclined flue structure according to claim 1 or 2, characterized in that, The upper part of the nose bridge brick is provided with a hook hole for cooperating with a hook tool to realize the replacement of the nose bridge brick.

4. The adjustable coke oven inclined flue structure according to claim 1, characterized in that, The adjusting brick is positioned and fixed by means of the shoulder platforms on both sides being placed on the masonry in the corresponding ramp area.

5. The adjustable coke oven inclined flue structure according to claim 1, characterized in that, The upper part of the adjusting brick is of a cuboid structure, and the outer side surface of the lower part is an arc surface extending inward and downward.

6. The adjustable coke oven inclined flue structure according to claim 1 or 4 or 5, characterized in that, The upper part of the adjusting brick is provided with a hook hole for cooperating with a hook tool to realize the replacement of the adjusting brick.

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