CN217025851U

CN217025851U - Coke oven

Info

Publication number: CN217025851U
Application number: CN202220131395.9U
Authority: CN
Inventors: 项诚鹏
Original assignee: Sinosteel Equipment and Engineering Co Ltd
Current assignee: Sinosteel Equipment and Engineering Co Ltd
Priority date: 2022-01-18
Filing date: 2022-01-18
Publication date: 2022-07-22
Anticipated expiration: 2032-01-18

Abstract

The embodiment of the application discloses a coke oven, which can reduce the height of combustion flame, increase the temperature of the lower part of a combustion chamber and increase the heat of a carbonization chamber when coke oven gas is used for heating in the coke oven by reducing the height of the top end of a lamp cap brick; this application reduces bridge of the nose brick's height for the gas that lies in one section export of the coal gas of bridge of the nose brick both sides and one section export of air respectively joins the angle increase, and gas joins the height and reduces, reduces the flame height, and when coke oven used coke oven gas heating, bottom gas outlet all was the air, joins the angle and strengthens, and the air jet height reduces, and with the lamp holder brick cooperation that reduces the top height, reduces the burning flame height. The lower part of the coking chamber is filled with coal with large water content and large density, the flame height is reduced, the lower part heat of the coking chamber can be increased, the mixed coal in the coking chamber is coked more uniformly, the coking time is shortened, and the coke oven efficiency is further improved.

Description

Coke oven

Technical Field

The application relates to the technical field of coking design, in particular to a coke oven.

Background

With the development of large-scale coke ovens, the effective volume of a coke oven carbonization chamber is larger and larger, but the increase of the length direction of the coke oven is influenced by the mechanical manufacturing capability and the mechanical strength of the coke oven, and the increase range is limited, firstly, the increase of the width direction of the coke oven leads the chemical product components, the product quality and the like of the coke oven to be influenced, secondly, the increase of the width direction of the coke oven leads coal materials to be heated unevenly in the coal coking process, the coking of the outer layer coal materials is completed, the inner coal materials are not completely mature, or the inner coal materials are completely mature, and the outer coal materials are over-fired.

Under the condition that the increase of the length direction and the width direction of the coking chamber is limited, the increase of the effective volume of the coking chamber can only lead the height of the coke oven to be higher and higher, the height of the coke oven in China is increased from less than 4 meters to nearly 8 meters at present, and the highest coke oven in the world is more than 8 meters.

The coke oven highlights the following problems after being heightened:

1. the coal material density at the lower part of the carbonization chamber is increased by heightening the carbonization chamber, more heat is needed for coking the coal material at the lower part of the carbonization chamber, and the prior art generally adopts the methods of increasing the flame height and heating in sections, but the heat supply at the upper part of the carbonization chamber is increased by the means, and more energy needed at the lower part of the carbonization chamber is ignored, so that the coal material at the lower part of the carbonization chamber is not coked or the coking time is long;

2. after the effective volume of the coking chamber is increased, the structural strength requirement on the coke oven is increased, the density of coal materials at the lower part of the coking chamber is increased, the compression deformation amount is small during coke pushing, the coke pushing resistance is large, the acting force of the coal materials on the oven wall at the lower part of the combustion chamber is increased in the coke pushing process, and the structural strength requirement on the lower part of the combustion chamber is higher;

3. along with the increase of the height direction of the coke oven, the uniformity of the heating in the height direction of a coke oven heating system is difficult to adjust, and the distribution of coal resources is uneven, so that the production efficiency of the coke oven cannot reach the optimal production efficiency in order to ensure the maturity of coke and the temperature of the space at the top of the coke oven under the condition of fixed heating level of the coke oven and fixed space at the top of the coke oven, and the components of mixed coal applicable to the coke oven are basically fixed, so that the flexibility of controlling the increase and decrease of the production cost is lacked.

SUMMERY OF THE UTILITY MODEL

The application provides a coke oven, which aims to increase the heat at the lower part of a carbonization chamber, improve the coking uniformity of coal in the carbonization chamber and shorten the coking time of the coal at the lower part of the carbonization chamber.

In order to achieve the purpose, the application provides a coke oven, which comprises a combustion chamber and a carbonization chamber, wherein the combustion chamber and the carbonization chamber are arranged at intervals,

the height of the top end of the lamp cap brick of the combustion chamber is 0-50mm higher than that of the bottom of the combustion chamber,

the height of the nose bridge brick of the combustion chamber is at most flush with the bottom of the combustion chamber, and a coal gas first-stage outlet and an air first-stage outlet are respectively arranged on two sides of the nose bridge brick.

Preferably, in the coke oven, the top thickness of the nose bridge brick is 20-25 mm.

Preferably, in the above coke oven, the thickness of the lower furnace wall of the combustion chamber is greater than that of the upper furnace wall of the combustion chamber, and the thickness of the lower furnace wall is increased in a linear proportion from top to bottom.

Preferably, in the above-described coke oven, the thickness of the upper wall of the combustion chamber is 95 to 100mm,

the upper end of the lower furnace wall is 95-100mm in thickness, the lower end of the lower furnace wall is 120-125mm in thickness, and the height of the lower furnace wall is at least 1000 mm.

Preferably, in the coke oven, the lower furnace wall is a high-density heat-conducting silica brick furnace wall.

Preferably, in the coke oven, the middle part of the combustion chamber is provided with a second-stage coal gas outlet and a second-stage air outlet;

the upper part of the combustion chamber is provided with three sections of coal gas outlets and three sections of air outlets.

Preferably, in the above coke oven, the lower wall is not provided with an exhaust gas circulation hole.

Preferably, in the coke oven, the top of the combustion chamber is provided with air supplementing pipes, the air supplementing pipes are located at two sides of a fire observation hole channel at the top of the coke oven, the air supplementing pipes are arranged along the length extending direction of the coke oven, two ends of the air supplementing pipes along the length extending direction of the coke oven are communicated with the atmosphere, and the middle part of the air supplementing pipes is communicated with the fire observation hole.

Preferably, in the above coke oven, the bottom of the combustion chamber is flush with the bottom of the carbonization chamber.

According to the coke oven provided by the embodiment of the application, the height of the top end of the lamp cap brick is reduced, so that when coke oven gas is used for heating in the coke oven, the height of combustion flame can be reduced, the temperature of the lower part of a combustion chamber is increased, and the heat of a carbonization chamber is increased; this application reduces the height of bridge of the nose brick for the gas that lies in one section export of the coal gas of bridge of the nose brick both sides and one section export of air respectively joins the angle increase, and gas joins the height and reduces the flame height, and when coke oven used coke oven gas heating, the bottom gas outlet all was the air, joins the angle and strengthens, and the air jet height reduces, and lamp holder brick cooperation with reduction top height reduces the burning flame height. The coal charged at the lower part of the coking chamber has large water content and large density, reduces the height of flame, can increase the heat at the lower part of the coking chamber, ensures that the mixed coal in the coking chamber is more uniformly coked, shortens the coking time and further improves the coke oven efficiency.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is obvious that the drawings in the following description are only examples or embodiments of the application, and that for a person skilled in the art, without inventive effort, further drawings can be derived from the presented drawings, and the application can also be applied to other similar scenarios from the presented drawings. Unless otherwise apparent from the context, or stated otherwise, like reference numbers in the figures refer to the same structure or operation.

FIG. 1 is a schematic structural diagram of a coke oven provided by an embodiment of the utility model;

FIG. 2 is a schematic view of the structure of the lower end of a coke oven according to an embodiment of the present invention.

The drawings are illustrated as follows:

101. the burner comprises a combustion chamber, 1011, a lamp cap brick, 1012, a nose bridge brick, 1013, a first coal gas outlet, 1014, a first air outlet, 1015, a second coal gas outlet, 1016, a second air outlet, 1017, a third coal gas outlet, 1018, a third air outlet, 1019, a vertical flue partition wall, 1020, a flame hole channel, 102, a carbonization chamber, 103, a furnace wall, 201 and an air supplementing pipeline.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant application and are not limiting of the application. The embodiments described are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that, for the convenience of description, only the portions related to the related applications are shown in the drawings. The embodiments and features of the embodiments in the present application may be combined with each other without conflict.

It should be understood that "system", "apparatus", "unit" and/or "module" as used in this application is a method for distinguishing different components, elements, parts, portions or assemblies at different levels. However, other words may be substituted by other expressions if they accomplish the same purpose.

As used in this application and in the claims, the terms "a," "an," "the," and/or "the" are not intended to be inclusive in the singular, but rather are intended to include the plural, unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" are intended to cover only the explicitly identified steps or elements as not constituting an exclusive list and that the method or apparatus may comprise further steps or elements. An element defined by the phrase "comprising an … …" does not exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element.

Wherein in the description of the embodiments of the present application, "/" indicates an inclusive meaning, for example, a/B may indicate a or B; "and/or" herein is merely an association relationship describing an associated object, and means that there may be three relationships, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, in the description of the embodiments of the present application, "a plurality" means two or more than two.

In the following, the terms "first", "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

Flowcharts are used herein to illustrate the operations performed by systems according to embodiments of the present application. It should be understood that the preceding or following operations are not necessarily performed in the exact order in which they are performed. Rather, the steps may be processed in reverse order or simultaneously. Meanwhile, other operations may be added to or removed from these processes.

Please refer to fig. 1-2.

Some embodiments of the application disclose a coke oven, which comprises a combustion chamber 101 and a carbonization chamber 102, wherein the combustion chamber 101 and the carbonization chamber 102 are arranged at intervals, and the combustion chamber 101 is arranged on two sides of the carbonization chamber 102, namely the combustion chamber 101, the carbonization chamber 102, the combustion chamber 101, the carbonization chambers 102 and … …, the combustion chamber 101, the carbonization chamber 102 and the combustion chamber 101 are sequentially arranged in the coke oven. In the present application, the direction in which the combustion chambers 101 and the coking chambers 102 are arranged at intervals is the length direction of the whole coke oven group.

The present application adjusts the height of the burner tile 1011 and the height of the nose bridge tile 1012 of the combustion chamber 101. Specifically, in the prior art, the top end of the lamp head brick 1011 is 200-300mm higher than the bottom of the combustion chamber 101, the height of the lamp head brick 1011 is reduced in the present application, the top end of the lamp head brick 1011 is 0-50mm higher than the bottom of the combustion chamber 101, that is, the top end of the lamp head brick 1011 is at least flush with the bottom of the combustion chamber 101 and is 50mm higher than the top end of the lamp head brick 1011 at most; in the prior art, the height of the nose bridge brick 1012 is reduced from a half brick layer to a one-layer brick height, the top end of the nose bridge brick 1012 is at most flush with the bottom of the combustion chamber 101, the upper straight section of the nose bridge brick 1012 structure is eliminated, and the thickness of the top end of the nose bridge brick 1012 is reduced from 40mm to 20-25 mm. The thickness of the top end of the nose bridge brick 1012 is the dimension of the nose bridge brick along the length direction of the whole group of coke ovens.

According to the application, the height of the top end of the lamp cap brick 1011 is reduced, so that when coke oven gas is used for heating in a coke oven, the height of combustion flame can be reduced, the temperature of the lower part of the combustion chamber 101 is increased, and the heat of the carbonization chamber 102 is increased; this application reduces bridge of the nose brick 1012's height for the gas that is located one section export 1013 of coal gas and one section export 1014 of air of bridge of the nose brick 1012 both sides respectively joins the angle increase, and gas joins the height and reduces, reduces the flame height, and when coke oven used coke oven gas heating, bottom gas outlet all was the air, joins the angle and strengthens, and the air jet height reduces, cooperates with the lamp holder brick 1011 that reduces the top height, reduces the burning flame height. The coal charged at the lower part of the coking chamber 102 has large water content and large density, reduces the height of flame, can increase the heat at the lower part of the coking chamber 102, ensures that the mixed coal in the coking chamber 102 is more uniformly coked, shortens the coking time and further improves the coke oven efficiency.

In the prior art, the furnace wall 103 of the coke oven adopts the same thickness in the height direction, so the design is simple, the number of brick shapes is small, the construction is convenient, but along with the increasing height of the coke oven, the density of coal at the lower part of the carbonization chamber 102 is high, and in addition, the compression deformation rate in the coke pushing process after coke is generated is small, so that the load borne by the furnace wall 103 at the lower part of the combustion chamber 101 is large, specifically, the area with the largest load in the coke pushing process of the combustion chamber 101 is arranged upwards from the bottom of the carbonization chamber 102 by about 1m, and the furnace wall 103 of the combustion chamber 101 is most easily damaged.

In order to increase the strength of the furnace wall 103 of the combustion chamber 101, the thickness of the lower furnace wall of the combustion chamber 101 is greater than the thickness of the upper furnace wall of the combustion chamber 101 in the present application.

Preferably, the upper furnace wall uses bricks with the thickness of 95-100mm, the lower furnace wall of the combustion chamber 101 is thickened in a linear proportion from top to bottom, an integer number of brick layers of about 1m is taken as a boundary, the upper end thickness of the upper furnace wall is 95-100mm, and the lower end thickness of the lower furnace wall is 120-125 mm.

The height of the lower furnace wall is at least 1000 mm.

The strength of the oven wall 103 of the coke oven is calculated according to different oven types and different coking coal indexes, and finally the size of the oven wall 103 is determined.

The lower space of the combustion chamber 101 is formed in an inverted trapezoid, that is, the lower space of the combustion chamber 101 is smaller than the upper space of the combustion chamber 101, which increases the structural strength of the combustion chamber 101, but the thickness of the lower furnace wall is increased and the thermal conductivity is reduced accordingly.

In order not to influence the heat transfer of the lower furnace wall, the lower furnace wall is made of high-density heat-conducting silica bricks. The high thermal conductivity silica brick has high thermal conductivity coefficient and higher structural strength than normal silica bricks, so that the structural strength of the furnace wall 103 can be further increased without influencing the thermal conductivity coefficient of the furnace wall 103.

According to the gas burner, the middle part of the combustion chamber 101 is provided with the second-stage gas outlet 1015 and the second-stage air outlet 1016, the upper part of the combustion chamber 101 is provided with the third-stage gas outlet 1017 and the third-stage air outlet 1018, segmented heating of the combustion chamber 101 is achieved, and heating uniformity of the combustion chamber 101 in the height direction is improved. The second-stage gas outlet 1015 and the second-stage air outlet 1016 can be aligned with each other along the height direction of the coke oven or arranged in a staggered manner, and the third-stage gas outlet 1017 and the third-stage air outlet 1018 can be aligned with each other along the height direction of the coke oven or arranged in a staggered manner. The means for adjusting the uniformity of heating in the height direction of the combustion chamber 101 is increased.

In the prior art, the waste gas circulation holes are positioned in the three layers of vertical fire path partition walls 1019 below the combustion chamber 101, so that the strength of the lower part of the combustion chamber 101 is greatly reduced.

The waste gas circulation holes are mainly used for drawing up combustion flame and slowing down the combustion speed, so that the combustion chamber 101 is uniformly heated in the height direction, and the two-section gas outlet 1015, the two-section air outlet 1016, the three-section gas outlet 1017 and the three-section air outlet 1018 are arranged on the combustion chamber 101, so that the combustion chamber 101 is heated in a segmented mode, the waste gas circulation holes can be omitted, the waste gas circulation holes do not affect the heating of the combustion chamber 101 in the height direction, meanwhile, the height of the combustion flame of gas can be reduced, and the strength of the lower portion of the combustion chamber 101 can be increased, and multiple purposes are achieved at one stroke.

The top of the combustion chamber 101 is provided with an air supplement pipeline 201, the air supplement pipeline 201 is positioned at two sides of a fire observation hole channel 1020 at the top of the furnace, the air supplement pipeline 201 is arranged along the length extending direction of the coke oven, two ends of the air supplement pipeline 201 along the length extending direction of the coke oven are communicated with the atmosphere, and the middle part of the air supplement pipeline 201 is communicated with the fire observation hole channel 1020.

Both ends of the air supply passage 201 in the longitudinal direction of the coke oven are communicated with the atmosphere through a communication pipe perpendicular to the longitudinal direction of the coke oven.

The present application controls the amount of air drawn by the air make-up line 201 by controlling the pressure within the combustion chamber 101.

At present, the content of nitrogen oxides discharged by coke oven waste gas is more and more tightly controlled no matter at home or internationally, the generation of nitrogen oxides in the coke oven waste gas belongs to a thermal type, the higher the temperature in the combustion chamber 101 is, the higher the content of nitrogen oxides is, and the combustion rate and the temperature can be controlled by heating the gas in the combustion chamber 101 in sections.

The proportion of the coal gas and the air is controlled, so that the air quantity of the gas outlet of each section is less than that of the coal gas, the coal gas is in an incomplete combustion state all the time, the combustion temperature is reduced, the temperature of a high-temperature point in the combustion chamber 101 is reduced, the content of nitrogen oxides is reduced, and the incompletely combusted coal gas and air sucked through the air supplement pipeline 201 on the top of the furnace are completely combusted.

The coke oven height direction heating is adjusted by adjusting the coal gas amount and the air amount sucked by the air supplementing pipeline 201, so that the content of nitrogen oxide in the coke oven combustion waste gas is controlled, and the coke oven height direction heating is uniform and adjustable.

The horizontal height of heating is adjusted, so that the coke oven adapts to the change of the blended coal, the economic benefit is increased, the temperature of the descending vertical flue is increased, the temperature difference between the ascending vertical flue and the descending vertical flue is reduced, and the temperature of the coke oven is uniform.

The utility model is suitable for top-mounted coke ovens with single rich gas heating type, single lean gas heating type and lean rich gas composite heating type with the oven height of 5-10 m, and is also suitable for stamp-charging coke ovens with single rich gas heating type, single lean gas heating type and lean rich gas composite heating type with the oven height of 5-10 m.

In this application, the bottom of the combustion chamber 101 is flush with the bottom wall of the carbonization chamber 102.

The bottom height of combustion chamber 101 is higher than the high at least one deck brick of bottom of carbomorphism room 102 among the prior art, and this application will reduce the bottom height of combustion chamber 101, highly drop the bottom of combustion chamber 101 to highly keeping level with the diapire of carbomorphism room 102 basically, change heat conduction into by original heat radiation, increase heat conduction efficiency.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and so forth) having computer-usable program code embodied therein.

The above description is only for the purpose of illustrating the preferred embodiments of the present application and the technical principles applied, and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. The scope of the application referred to in the present application is not limited to the specific combinations of the above-mentioned features, and it is intended to cover other embodiments in which the above-mentioned features or their equivalents are arbitrarily combined without departing from the spirit of the application. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims

1. The coke oven is characterized by comprising a combustion chamber (101) and a carbonization chamber (102), wherein the combustion chamber (101) and the carbonization chamber (102) are arranged at intervals,

the height of the top end of the lamp cap brick (1011) of the combustion chamber (101) is 0-50mm higher than that of the bottom of the combustion chamber (101),

the height of a nose bridge brick (1012) of the combustion chamber (101) is at most flush with the bottom of the combustion chamber (101), and a coal gas first-stage outlet (1013) and an air first-stage outlet (1014) are respectively arranged on two sides of the nose bridge brick (1012).

2. Coke oven according to claim 1, characterized in that the nose bridge brick (1012) has a top thickness of 20-25 mm.

3. Coke oven according to claim 1, characterized in that the thickness of the lower wall of the combustion chamber (101) is greater than the thickness of the upper wall of the combustion chamber (101), the thickness of the lower wall being thickened in a linear proportion from top to bottom.

4. Coke oven according to claim 3, characterized in that the thickness of the upper wall of said combustion chamber (101) is comprised between 95 and 100mm,

the thickness of the upper end of the lower furnace wall is 95-100mm, the thickness of the lower end of the lower furnace wall is 120-125mm, and the height of the lower furnace wall is at least 1000 mm.

5. The coke oven of claim 4, wherein the lower oven wall is a high dense thermally conductive silica brick oven wall.

6. Coke oven according to claim 1, characterized in that the middle part of the combustion chamber (101) is provided with a secondary gas outlet (1015) and a secondary air outlet (1016);

the upper part of the combustion chamber (101) is provided with a three-section gas outlet (1017) and a three-section air outlet (1018).

7. The coke oven of claim 5, wherein said lower oven wall is free of flue gas recirculation holes.

8. The coke oven according to claim 1, characterized in that the top of the combustion chamber (101) is provided with air supplementary ducts (201), the air supplementary ducts (201) are located on both sides of a fire observation hole channel (1020) of the top, the air supplementary ducts are arranged along the length extending direction of the coke oven, both ends of the air supplementary ducts along the length extending direction of the coke oven are communicated with the atmosphere, and the middle of the air supplementary ducts are communicated with the fire observation hole channel (1020).

9. Coke oven according to claim 1, characterized in that the bottom of the combustion chamber (101) is flush with the bottom of the carbonization chamber (102).