Lining refractory body structure of hot blast stove

Abstract

The utility model relates to a lining refractory body structure of a hot blast stove. The lining refractory body structure of the hot blast stove comprises a refractory brick masonry, a steel vault and a steel fiber pouring body, the refractory brick masonry is located on the inner side of the hot-blast stove shell, refractory fibers are arranged on one side of the hot-blast stove shell, a burner and a combustion-supporting air pipe are arranged on one side of the hot-blast stove shell, the steel arch crown is an n-shaped steel arch, the bottoms of the two sides of the steel arch crown are arranged on the refractory brick masonry on the lower portion of a combustion chamber, and V-shaped grasping nails are evenly distributed on the upper surface of the steel arch crown. And a steel fiber pouring body is arranged between the steel vault and the hot blast stove shell, and is effectively combined with the V-shaped grasping nails. The integrally-poured combustion chamber refractory body structure is good in heat preservation and heat insulation effect, has good burning loss resistance and hot air flow scouring resistance, avoids the risk that refractory bricks on the arch crown of a combustion chamber brick masonry loosen and fall off, greatly prolongs the service life of the hot blast stove combustion chamber refractory body, does not need to be frequently shut down for replacement, improves the production efficiency, and meanwhile, reduces the production cost. And safe production is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lining refractory material in hot blast stove combustion chamber, and particularly relates to a lining refractory structure of hot blast stove. BACKGROUND

[0002] In the process of preparing pulverized coal, natural gas is mixed with air through a burner and fully combusted to generate high-temperature flue gas of about 1000-1200 DEG C, and the heat of the high-temperature flue gas is conducted to the heated air or circulating flue gas by means of a hot blast stove with heat strengthening measures. The high-temperature flue gas is drawn into the inside of a mill by an induced draft fan after the heat is dissipated to reduce the temperature to 200-350 DEG C to dry the pulverized coal. The hot blast stove body is installed horizontally, adopts a sleeve type steel plate structure, and the lining refractory in the combustion chamber is built by refractory bricks. Because the temperature in the furnace changes sharply (0-1000 DEG C) during the processes of heating, temperature maintaining, stopping and extinguishing, the refractory bricks in the combustion chamber bear a high cracking force, and the stress generated during drying and heating causes the refractory brick masonry joint to shrink and crack, especially the refractory bricks in the dome arc section shrink under the condition of cold and hot alternation, the dome bricks are easily burned and fallen off, which seriously affects the service life of the lining refractory in the furnace and the process safety, the lining refractory masonry is frequently replaced during stopping, which seriously hinders the improvement of production efficiency, and the high-temperature surface of the fallen refractory bricks in the flammable and explosive area of the pulverized coal easily causes production safety accidents. CONTENT OF THE UTILITY MODEL

[0003] To solve or partially solve the problems in the prior art, the present application provides a lining refractory structure of hot blast stove, which can have good anti-burning and anti-hot gas flow scouring capacity, eliminate the risk of loose and falling off of the dome refractory bricks of the brick masonry in the combustion chamber, and greatly prolong the service life of the lining refractory in the hot blast stove combustion chamber.

[0004] The present application provides a lining refractory structure of hot blast stove, which comprises a refractory brick masonry 1, a steel dome 2 and a steel fiber pouring body 3. The refractory brick masonry 1 is arranged on the inside of the hot blast stove shell, one side of the hot blast stove shell is provided with refractory fiber and is provided with a burner 4 and a combustion air pipe 5, the steel dome 2 is an n-shaped steel dome, the bottom of the two sides of the steel dome 2 is arranged on the lower refractory brick masonry 1 of the combustion chamber, the upper surface of the steel dome 2 is uniformly provided with V-shaped nails 6, and the steel fiber pouring body 3 is arranged between the steel dome 2 and the hot blast stove shell, and the steel fiber pouring body 3 is effectively combined with the V-shaped nails 6.

[0005] Optionally, in some schemes, the combustion air pipes 5 are symmetrically arranged on the upper and lower sides of the burner 4, and the extension lines of the blowing mouths of the two combustion air pipes 5 intersect on the extension line of the burner 4.

[0006] Optionally, in some schemes, the steel dome 2 is made of 16Mng high-quality carbon structural steel.

[0007] The technical solution provided in this application may include the following beneficial effects:

[0008] This application has good thermal insulation effect, and the integrated cast-in-place combustion chamber refractory structure has good resistance to burn-off and protection against hot air erosion. It eliminates the risk of loosening and falling off of the refractory bricks in the combustion chamber masonry arch, greatly extending the service life of the hot blast stove combustion chamber refractory. It eliminates the need for frequent furnace shutdowns for replacement, improving production efficiency while ensuring safe production.

[0009] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0010] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.

[0011] Fig. 1 This is a schematic diagram of the refractory lining structure of the hot blast stove shown in the embodiments of this application;

[0012] Fig. 2 This is a side sectional view of the refractory lining structure of the hot blast stove shown in the embodiments of this application.

[0013] Figure label:

[0014] 1-Refractory brick masonry, 2-Steel arch, 3-Steel fiber cast body, 4-Burner, 5-Combustion duct, 6-V-shaped rivet. Detailed Implementation

[0015] Embodiments of this application will now be described in more detail with reference to the accompanying drawings. While embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to make this application more thorough and complete, and to fully convey the scope of this application to those skilled in the art.

[0016] It should be understood that although the terms "first," "second," "third," etc., may be used in this application to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this application, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0017] In the description of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0018] Unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be direct connection, or indirect connection through intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0019] In view of the above problems, the present application provides a hot blast stove lining refractory structure, which can have good anti-burning and anti-hot gas flow scouring ability, eliminate the risk of loose and falling of the refractory bricks of the combustion chamber brick arch, and greatly prolong the service life of the hot blast stove combustion chamber refractory.

[0020] The technical solutions of the embodiments of the present application are described in detail below with reference to the drawings.

[0021] Referring to Figs. 1-2 , the hot blast stove lining refractory structure comprises a refractory brick lining 1, a steel arch 2 and a steel fiber pouring body 3; the refractory brick lining 1 is located inside the hot blast stove shell, one side of the hot blast stove shell is provided with refractory fiber and is provided with a burner 4 and a combustion air pipe 5, the steel arch 2 is an n-shaped steel arch, the bottom of the two sides of the steel arch 2 is located on the lower refractory brick lining 1 of the combustion chamber, the upper surface of the steel arch 2 is uniformly provided with V-shaped nails 6, and the steel fiber pouring body 3 is arranged between the steel arch 2 and the hot blast stove shell, and the steel fiber pouring body 3 is effectively combined with the V-shaped nails 6; the combustion air pipe 5 is symmetrically arranged on the upper and lower sides of the burner 4, and the extension lines of the blowing mouths of the two combustion air pipes 5 intersect on the extension line of the burner 4.

[0022] In operation, the cross section of the refractory brick masonry 1 connected with the steel fiber cast body 3 forms a circular structure, the steel fiber cast body 3 is on the upside of the refractory brick masonry 1, the steel arch top 2 is on the inside of the steel fiber cast body 3, and the steel arch top 2 is arranged on the refractory brick masonry 1, the V-shaped nails 6 are effectively combined with the steel fiber cast body 3 to form an integrated cast body, the steel fiber cast body 3 has good heat resistance and good anti-burning and anti-falling capacity, even in the case of complete burning of the steel arch top 2, the steel fiber cast body 3 can be used alone for 3-5 years, greatly prolonging the service life of the lining refractory body in the hot blast furnace combustion chamber, and the hot blast furnace does not need to be frequently stopped for replacement, which is beneficial to improve the production efficiency.

[0023] The enhanced steel fiber cast body 3 is used between the steel arch top 2 and the furnace shell, which has the potential to withstand high crack resistance, has significantly improved tensile strength, can improve the stress structure of the furnace refractory material during drying and heating, makes the combustion chamber refractory body not produce local microcracks, highlights the good reinforcing effect, and can increase the service life of the combustion chamber by 3-6 times, effectively ensuring the integrity and air tightness of the furnace body.

[0024] In some embodiments, the steel arch top 2 is made of 16Mng high-quality carbon structural steel.

[0025] In operation, the steel arch top 2 is made of 16Mng high-quality carbon structural steel, which has the characteristics of high strength, good heat resistance, easy processing, etc.

[0026] Finally, it should be noted that in this document, relationships such as first and second, and the like, are merely used to distinguish one entity or action from another, and do not necessarily require or imply any actual such relationship or order between or among entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0027] The units described as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, i.e. they can be located in one place or distributed on multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.

[0028] Having described various embodiments of the application, it is to be understood that the above description is meant not to limit and not to encompass all of the possible embodiments. Many modifications and variations of this application can be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. It is intended that the scope of the application be defined by the scope of the patent and by the claims as allowed by the patent office, which can include adaptations based on the description, equivalents, and / or substitutions of elements individually or collectively to the entire disclosure.

Claims

1. A hot blast stove lining refractory structure, characterized by: The hot blast stove lining refractory structure comprises a refractory brick masonry (1), a steel arch (2) and a steel fiber cast body (3); the refractory brick masonry (1) is arranged inside a hot blast stove shell, one side of the hot blast stove shell is provided with a refractory fiber and is provided with a burner (4) and a combustion air pipe (5), the steel arch (2) is an n-shaped steel arch, the bottom of the two sides of the steel arch (2) is arranged on the lower refractory brick masonry (1) of the combustion chamber, the upper surface of the steel arch (2) is uniformly provided with V-shaped nails (6), and the steel fiber cast body (3) is arranged between the steel arch (2) and the hot blast stove shell, and the steel fiber cast body (3) is effectively combined with the V-shaped nails (6).

2. The hot blast stove lining refractory structure according to claim 1, characterized in that: The combustion air pipe (5) is symmetrically arranged on the upper and lower sides of the burner (4), and the extension lines of the blowing mouths of the two combustion air pipes (5) intersect on the extension line of the burner (4).

3. The hot blast stove lining refractory structure according to claim 1 or 2, characterized in that: The steel arch (2) is made of 16Mng high-quality carbon structural steel.

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