CN215713101U

CN215713101U - Top combustion hot blast stove with upmixing gas nozzle steel burner

Info

Publication number: CN215713101U
Application number: CN202021859451.8U
Authority: CN
Inventors: 马茜; 王季; 崔怡; 闫俊佳
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-08-31
Filing date: 2020-08-31
Publication date: 2022-02-01
Anticipated expiration: 2030-08-31

Abstract

The utility model relates to a top combustion hot blast stove with an up-mixed gas nozzle steel burner, which can effectively solve the problems of long service life, high heat efficiency utilization, energy conservation and environmental protection. The furnace body is vertically and upwards arranged on the furnace bottom, the upper part of the furnace bottom is connected with a burner through labyrinth sliding, the upper part of the burner is provided with an arched furnace top, and a combustion chamber is formed in the furnace top; an 3/4 annular air pipeline is arranged outside the wall body of the combustor on the side with the high heat accumulator, 3/4 annular steel gas pipelines which are parallel to the air pipeline up and down are arranged outside the wall body of the combustor on the lower portion of the air pipeline in an interval mode, a vertically upward mixed gas spray pipe is arranged in the wall body of the combustor, the upper end of the mixed gas spray pipe is communicated with a nozzle facing a combustion chamber, and a hot air outlet pipe communicated with the combustion chamber is arranged between the upper portion of the wall body of the combustor on the side with the low heat accumulator and the furnace top. The utility model has the advantages of solid and durable structure, long service life, high heat efficiency and utilization degree and small environmental pollution, and is a great innovation for the structure of the existing hot blast stove.

Description

Top combustion hot blast stove with upmixing gas nozzle steel burner

Technical Field

The utility model relates to a hot blast stove, in particular to a top combustion hot blast stove with an upward mixed gas nozzle steel burner.

Background

The hot blast stove is a common device in industrial production, the performance of the hot blast stove directly influences the normal operation, the use efficiency and the service life of a blast furnace, in the last 70 th century, the Dutch Hogowski company invents and designs a catenary internal combustion type hot blast stove, the internal combustion type hot blast stove adopts a catenary vault structure, a burner is arranged at the lower part of a fire well, the fire well is arranged in the same circular through body parallel to a regenerative chamber, an eye-shaped partition wall is adopted to divide the fire well and the regenerative chamber into two parts, a hot air outlet is arranged at the middle lower part of the fire well and the same position of the height of a blast furnace surrounding pipe mark, the upper part of a flame net vault runs and turns back to enter the regenerative body during combustion, during air supply, cold air enters from a cold air chamber to turn back the high temperature in the regenerative body upwards through the vault to enter the fire well, and hot air is conveyed to the blast furnace through the hot air outlet arranged at the middle lower part of the fire well to carry out the working principle of intensified smelting. In about 2000 years, internal combustion hot blast stoves are popular all over the world, making outstanding contributions to the development of iron and steel in the world.

At present, the common blast furnaces comprise an internal combustion type blast furnace, an external combustion type blast furnace and a top combustion type blast furnace, because the top combustion type blast furnace has the advantages of large combustion intensity, short flame distance, relatively simple structure and the like, the common top combustion type blast furnace has long-term development in recent years and is widely applied to the hot air supply of the blast furnace, and the common top combustion type blast furnace has two different furnace type structures, namely a top combustion type blast furnace (small vault) with a pre-combustion chamber arranged at the top of a combustion chamber, and a top combustion type blast furnace (large vault) with an annular combustor arranged at the bottom of the combustion chamber. As different hot blast stove technologies, the advantages and the disadvantages of the hot blast stove are different. Some defects of the hot blast stove are inherent, some defects are caused by structure, materials and masonry, and are mainly reflected by the following components in a whole manner: 1) pre-chamber damage from deflagration (small dome); 2) annular burners are damaged by extrusion blow-by (large dome); 3) collapse (common) of the combustor dome; 4) the checker bricks are damaged by over-enthalpy combustion (large vault is very much), particularly, a gas and air loop of an underlying annular combustor is extremely easy to damage under the action of thermal stress or structural stress (mainly caused by material and masonry problems), once the damage inevitably causes that the residual gas after the combustion is finished cannot be controlled and cannot be effectively swept, and the deflagration phenomenon continues in the air charging stage of the hot blast stove until the serious structural damage of the hot blast stove occurs or the accumulated slag of a combustion nozzle is burnt out (large vault); 5) high temperature stress damage at the hot air outlet, etc.; 6. the investment is large and the cost is high; 7. environmental pollution exists, and therefore, improvement and innovation on the structure of the existing blast furnace top combustion type hot blast stove are imperative.

SUMMERY OF THE UTILITY MODEL

In view of the above situation, the present invention aims to provide a top-combustion hot-blast stove with a steel burner with an up-mix gas nozzle, which can effectively solve the problems of long service life, high utilization of heat efficiency, low investment, energy saving and environmental protection.

The technical scheme includes that the top combustion type hot blast stove with the upward mixed gas nozzle steel burner comprises a stove body, a stove bottom, a stove top and a burner, wherein the stove body is vertically and upwardly arranged on the stove bottom, the burner is arranged on the upper part of the stove bottom in a sliding connection manner in a labyrinth manner, the arched stove top is arranged on the upper part of the burner, and a combustion chamber is formed in the stove top; the combustor comprises a combustor wall body, wherein an 3/4 annular air pipeline is arranged outside the combustor wall body on one side with a high heat accumulator, the air pipeline is a steel pipe annular pipeline or a pipeline with the outer side being a steel plate and the inner side being a refractory material masonry pipeline, 3/4 annular steel gas pipelines which are parallel to the air pipeline are arranged outside the combustor wall body on the lower portion of the air pipeline at intervals, a vertically upward mixed gas spray pipe is arranged in the combustor wall body, the upper end of the mixed gas spray pipe is communicated with a nozzle facing a combustion chamber, the lower end opening of the mixed gas spray pipe is communicated with the steel gas pipeline through a gas short pipe, the middle lower portion of the mixed gas spray pipe is communicated with the air pipeline through the air short pipe, an air inlet pipe communicated with the interior of the air pipeline is arranged on the air pipeline, a gas inlet pipe communicated with the interior of the steel gas pipeline is arranged on the steel gas pipeline, a first steel protective layer is arranged outside the furnace body, a second steel protection layer is arranged outside the furnace top to form an integral outer steel protection structure of the hot blast furnace; the upper part of the wall body of the combustor at the lower side of the heat accumulator is provided with a hot air outlet pipe communicated with the combustion chamber between the upper part and the furnace top.

The utility model has novel and unique structure, solid and durable structure, long service life, high utilization degree of heat efficiency and little environmental pollution, is a great innovation on the structure of the existing hot blast stove and has great economic and social benefits.

Drawings

Fig. 1 is a front view of a cross-sectional structure of the present invention.

FIG. 2 is a sectional front view of the burner portion of the present invention.

FIG. 3 is a top view of a burner nozzle portion of the present invention.

Fig. 4 is a front view of a cross-sectional structure of another embodiment of the present invention.

Detailed Description

The following detailed description of embodiments of the utility model refers to the accompanying drawings.

As shown in figures 1-3, the top combustion hot blast stove with the steel burner with the upward mixed gas nozzle comprises a stove body 1, a stove bottom 2, a stove top 4 and a burner, wherein the stove body 1 is vertically and upwardly arranged on the stove bottom 2, the burner is arranged at the upper part of the stove bottom 2 through a labyrinth type sliding connection 8, the arched stove top 4 is arranged at the upper part of the burner, and a combustion chamber 6 is formed in the stove top; the combustor comprises a combustor wall body, wherein an 3/4 annular air pipeline 3-4 is arranged outside the combustor wall body 3-1 on one side with a high heat accumulator, the air pipeline is a steel pipe annular channel or a pipeline with the outer side being a steel plate and the inner side being made of refractory materials, 3/4 annular steel gas pipelines 3-2 which are parallel to the air pipeline are arranged outside the combustor wall body 3-1 at the lower part of the air pipeline 3-4, a vertically upward mixed gas spray pipe 3-7 is arranged in the combustor wall body 3-1, the upper ends of the mixed gas spray pipes 3-7 are communicated with a nozzle 3-6 facing a combustion chamber 6, the lower end opening of the mixed gas spray pipe 3-7 is communicated with the steel gas pipeline 3-2 through a gas short pipe, the middle lower part of the mixed gas spray pipe 3-7 is communicated with the air pipeline 3-4 through an air short pipe, an air inlet pipe 3-5 communicated with the inside of the air pipeline 3-4 is arranged on the air pipeline, a gas inlet pipe 3-3 communicated with the inside of the steel gas pipeline 3-2 is arranged on the steel gas pipeline 3-2, a first steel protective layer 1-1 is arranged outside the furnace body 1, and a second steel protective layer 4-1 is arranged outside the furnace top 4, so that an integral outer steel protective structure of the hot blast furnace is formed; a hot air outlet pipe 7 communicated with a combustion chamber 6 is arranged between the upper part of the wall 3-1 of the combustor at the lower side of the heat accumulator and the furnace top 4.

In order to ensure the use effect and the use convenience, a regenerator 5 is formed in the burner and the furnace body, a regenerator (known technology) consisting of regenerator checker bricks is arranged in the regenerator, the upper end surface of the regenerator is in an inclined plane shape with one high side and one low side, the high side is flush with the upper end surface of the high end of the wall body of the burner, and the low side is flush with the upper end surface of the low end of the wall body of the burner;

a flue gas storage chamber is formed between the lower part of the furnace body 1 and the furnace bottom 2, and a manhole 2-1 and a flue gas outlet pipe 2-2 (conventional technology) are respectively arranged on the side surface of the flue gas storage chamber;

the air pipeline 3-4 is a long and flat hollow channel, the upper part of the channel is a plane, the lower part of the channel is an inclined plane, and the short air pipe is communicated with the lower end of the inclined plane part of the lower part of the hollow channel;

the steel gas pipeline 3-2 is a long flat hollow channel, the upper part of the channel is a plane, the lower part of the channel is an inclined plane, the inner side surface of the air pipeline 3-4 and the outer side surface of the gas inlet pipe 3-3 are on the same straight line, the outer diameter of the upper end surface of the gas inlet pipe 3-3 is larger than the outer diameter of the furnace body 1 and smaller than the outer diameter of the furnace top, the outer diameter of the upper part of the furnace body 1 is large, the outer diameter of the lower part of the furnace body 1 is small, and the upper inner diameter and the lower inner diameter of a regenerator formed by a combustor and the furnace body are the same.

FIG. 4 shows another embodiment of the present invention, which is the same in structure except that the upper and lower parts of the hot air outlet pipe 7 are connected with the furnace top 4 and the burner in different forms, and the connection relationship of the parts 3 in FIG. 1 is that the upper part of the burner is connected with the furnace top in a plane, and the lower part of the burner is connected with the lower furnace body in a sliding labyrinth manner; the burner shown in fig. 4 has two ends connected in a sliding labyrinth manner, and is substantially the same in structure, so that the above description is given only by way of example and is intended to illustrate the embodiments of the present invention, and not to limit the scope of the present invention.

It can be seen from the above that the present invention is an improvement on the structure of the existing hot blast stove, the working condition of the present invention is the same as that of the existing hot blast stove, the greatest improvement on the structure of the present invention is the improvement on the structure of the burner, the connection structure is improved, and meanwhile, the steel protective layer is additionally arranged on the top of the stove, the burner and the stove body, so as to improve the firmness of the whole structure of the stove body, in particular, the original ceramic burner is changed into an external protective layer, so that the gas and air loop of the burner is effectively prevented, the burner is extremely easy to damage (mainly caused by the material and masonry problems) under the action of thermal stress or structural stress, once the damage inevitably causes that the residual gas cannot be controlled and cannot be effectively swept, the deflagration phenomenon continues in the air filling stage of the hot blast stove until the serious structural damage of the hot blast stove occurs, because of the improvement on the structure, the service life of the hot blast stove is greatly prolonged, the hot blast stove and the use effect are ensured, the service life of the hot blast stove is improved by more than 1 time at least on the basis of the service life of the original hot blast stove of the same type through testing, the investment is saved by more than 20 percent, the work efficiency and the heat utilization rate are improved, the pollution to the environment is effectively reduced, and the economic benefit and the social benefit are huge.

Claims

1. A top combustion hot blast stove with a steel burner of an upward mixed gas nozzle comprises a stove body (1), a stove bottom (2), a stove top (4) and a burner, and is characterized in that the stove body (1) is vertically and upwardly arranged on the stove bottom (2), the burner is arranged at the upper part of the stove bottom (2) through a labyrinth type sliding connection (8), the arched stove top (4) is arranged at the upper part of the burner, and a combustion chamber (6) is formed in the stove top; the combustor comprises a combustor wall body, wherein 3/4 annular air pipelines (3-4) are arranged outside the combustor wall body (3-1) on the side with a high heat accumulator, the air pipelines are steel pipe annular channels or pipelines with the outer sides being steel plates and the inner sides being masonry made of refractory materials, 3/4 annular steel gas pipelines (3-2) which are parallel to the air pipelines up and down are arranged outside the combustor wall body (3-1) on the lower portion of the air pipelines (3-4), vertical upward mixed gas spray pipes (3-7) are arranged in the combustor wall body (3-1), the upper ends of the mixed gas spray pipes (3-7) are communicated with nozzles (3-6) facing a combustion chamber (6), the lower end ports of the mixed gas spray pipes (3-7) are communicated with the steel gas pipelines (3-2) through gas short pipes, the middle lower part of the mixed gas spray pipe (3-7) is communicated with an air pipeline (3-4) through an air short pipe, an air inlet pipe (3-5) communicated with the inside of the air pipeline (3-4) is arranged on the air pipeline (3-4), a gas inlet pipe (3-3) communicated with the inside of the steel gas pipeline (3-2) is arranged on the steel gas pipeline (3-2), a first steel protective layer (1-1) is arranged outside the furnace body (1), a second steel protective layer (4-1) is arranged outside the furnace top (4), and a steel protective structure of the whole outer layer of the hot blast furnace is formed; a hot air outlet pipe (7) communicated with the combustion chamber (6) is arranged between the upper part of the wall body (3-1) of the combustor on the side with the lower heat accumulator and the furnace top (4).

2. The top-firing stove as claimed in claim 1, wherein the burner and the stove body form a regenerator (5), and a regenerator comprising regenerator checker bricks is installed in the regenerator, and the upper end of the regenerator is in the form of an inclined plane with a high side and a low side, and the high side is flush with the upper end of the high end of the wall of the burner and the low side is flush with the upper end of the low end of the wall of the burner.

3. The top-fired hot blast stove with the up-mix gas nozzle steel burner as claimed in claim 1, wherein a flue gas storage chamber is formed between the lower part of the stove body (1) and the stove bottom (2), and a manhole (2-1) and a flue gas outlet pipe (2-2) are respectively installed on the side surface of the flue gas storage chamber.

4. The top-firing stove with the up-mix nozzle steel burners according to claim 1, wherein the air duct (3-4) is a hollow channel of a long and flat shape, the upper part of the channel is a flat surface, the lower part of the channel is an inclined surface, and the short air pipe communicates with the lower end of the inclined surface part of the lower part of the hollow channel.

5. The top-fired hot-blast stove with the steel burner having an up-mix gas nozzle according to claim 1, wherein the steel gas pipe (3-2) is a long and flat hollow passage, the upper portion of the passage is a flat surface, the lower portion of the passage is an inclined surface, the inner side surface of the air pipe (3-4) and the outer side surface of the gas inlet pipe (3-3) are on the same line, the outer diameter of the upper end surface of the gas inlet pipe (3-3) is larger than the outer diameter of the furnace body (1) and smaller than the outer diameter of the furnace top, the outer diameter of the upper portion of the furnace body (1) is larger than the outer diameter of the lower portion of the furnace body, and the upper and lower inner diameters of the burner and a regenerator formed in the furnace body are the same.