CN114893994A

CN114893994A - Furnace lining structure capable of quickly cooling furnace and recovering heat storage capacity of furnace lining

Info

Publication number: CN114893994A
Application number: CN202210616937.6A
Authority: CN
Inventors: 宋中华; 曹炳雷; 刘颖昊; 韩斌; 陈超; 雷廷; 黎洁
Original assignee: Wuhan Iron and Steel Co Ltd
Current assignee: Wuhan Iron and Steel Co Ltd
Priority date: 2022-06-01
Filing date: 2022-06-01
Publication date: 2022-08-12

Abstract

A furnace lining structure capable of quickly cooling a furnace and recovering heat storage of the furnace lining relates to the field of metallurgy. The furnace lining structure capable of quickly cooling the furnace and recovering the heat storage capacity of the furnace lining comprises a composite furnace lining arranged on the inner wall of a heating furnace, a water jacket penetrating through the composite furnace lining, a cooling water input header pipe, a cooling water output header pipe, a plurality of cooling water input branch pipes communicated with the cooling water input header pipe and the bottom of the water jacket, and a plurality of cooling water output branch pipes communicated with the cooling water output header pipe and the top of the water jacket, wherein each cooling water input branch pipe is provided with a cooling water inlet control valve, and each cooling water output branch pipe is provided with a cooling water outlet control valve. The application provides a can make the furnace lining structure of stove rapid cooling and recovery furnace lining heat accumulation can realize the rapid cooling of heating furnace to effectively retrieve the heat accumulation of the refractory material of furnace lining.

Description

Furnace lining structure capable of quickly cooling furnace and recovering heat storage capacity of furnace lining

Technical Field

The application relates to the field of metallurgy, in particular to a furnace lining structure capable of quickly cooling a furnace and recovering heat storage capacity of the furnace lining.

Background

In heating a billet before rolling, a heating furnace is generally used in which gas is supplied through a gas line by a burner and combustion air supplied through an air line is injected into the furnace for combustion. When refractory material falls off, steel billets fall off and iron scales are removed regularly in the heating furnace, operating personnel must enter the furnace to maintain the heating furnace. In order to allow an operator to enter the furnace to maintain the heating furnace, the temperature in the furnace must be lowered to an operable temperature, and when the temperature in the furnace needs to be lowered to an operable temperature, a method is generally used in which, on the one hand, the gas supply is stopped and the combustion is stopped, and on the other hand, the blower is continuously driven to supply combustion air into the furnace through the burner, and the furnace is cooled by the air. However, the method for cooling the furnace by using the combustion air needs a very long time to reduce the temperature in the furnace to the operable temperature, and usually needs 2 to 3 days to enter the furnace, so that the furnace is empty for a long time, the operation time of the heating furnace is shortened, and the use efficiency of the heating furnace is reduced.

Some patent documents propose the following processing schemes: a nozzle which can be inserted into a furnace is provided on the top of the heating furnace, and when combustion in the heating furnace is stopped, the nozzle is inserted into the furnace, and water is sprayed into the furnace from the nozzle, thereby reducing the temperature in the furnace. However, this method requires a special nozzle for spraying water when the lining is inserted into the furnace, and the nozzle needs to be pulled out at high temperature when not in use, which makes the operation troublesome and increases the cost. When the heating furnace is normally produced, the nozzle opening needs to be sealed, so that the operation is difficult, the hot gas in the furnace overflows to the environment from the pore space to dissipate heat, and the heat efficiency of the heating furnace is reduced. In addition, although the temperature in the furnace can be rapidly reduced by spraying water or water mist into the high-temperature furnace, the furnace body refractory is damaged in actual use. When water is sprayed into the furnace, low-temperature water is instantly vaporized by contacting with the furnace lining at the temperature of over 1200 ℃ to take away a large amount of heat, and high-temperature refractory materials are rapidly cooled, so that cracks are easily generated, and the heat preservation effect and the service life of the furnace lining are influenced. Meanwhile, a large amount of high-concentration water vapor generated by water spray cooling is condensed in the process of being discharged to a chimney, so that strong corrosion is generated on the air and gas heat exchanger, and the service life of the heat exchanger is shortened.

Disclosure of Invention

An object of this application is to provide a can make stove rapid cooling and retrieve furnace lining heat accumulation's furnace lining structure, its rapid cooling that can realize the heating furnace to effectively retrieve the heat accumulation of the refractory material of furnace lining.

The embodiment of the application is realized as follows:

the embodiment of the application provides a can make stove rapid cooling and retrieve furnace lining heat accumulation's furnace lining structure, it is including the compound furnace lining of locating the heating furnace inner wall, the water jacket that runs through compound furnace lining, cooling water input house steward, cooling water output house steward, many intercommunication cooling water input branch pipes and many intercommunication cooling water output house steward and the cooling water output branch pipe at water jacket top of intercommunication cooling water input house steward and water jacket bottom, all be equipped with cooling water inlet control valve on every cooling water input branch pipe, all be equipped with cooling water outlet control valve on every cooling water output branch pipe.

In some alternative embodiments, the composite lining comprises an inner insulating layer and an outer insulating layer connected to the inner wall of the furnace, and the water jacket is connected to the inner insulating layer and the outer insulating layer, respectively.

In some optional embodiments, the water jacket comprises a steel shell inner side steel plate connected with the inner heat insulation layer, a steel shell outer side steel plate connected with the outer heat insulation layer, and a plurality of partition plates connecting the steel shell inner side steel plate and the steel shell outer side steel plate, a cavity is respectively enclosed among the steel shell inner side steel plate, the steel shell outer side steel plate and the partition plates, and among the steel shell inner side steel plate, the steel shell outer side steel plate, the partition plates and the inner wall of the heating furnace, the bottom end of the cavity is connected with the cooling water input branch pipe, and the bottom end of the cavity is connected with the cooling water output branch pipe.

In some optional embodiments, a plurality of heat exchange fins are connected to the steel plate on the inner side of the steel shell and/or the steel plate on the outer side of the steel shell.

In some optional embodiments, a plurality of drain pipes are connected to the bottom of the water jacket, and each drain pipe is provided with a drain valve.

The beneficial effect of this application is: the application provides a can make stove rapid cooling and retrieve furnace lining heat accumulation's furnace lining structure is including locating the compound furnace lining of heating furnace inner wall, the water jacket that runs through compound furnace lining, cooling water input manifold, cooling water output manifold, many intercommunication cooling water input branch pipes and many intercommunication cooling water output manifold and the cooling water output branch pipe at water jacket top of intercommunication cooling water input manifold and water jacket bottom, all be equipped with cooling water inlet control valve on every cooling water input branch pipe, all be equipped with cooling water outlet control valve on every cooling water output branch pipe. The application provides a can make the furnace wall structure of stove rapid cooling and recovery furnace wall heat accumulation can realize the rapid cooling of heating furnace to effectively retrieve the heat accumulation of the resistant material of furnace wall.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

FIG. 1 is a schematic cross-sectional view of a furnace lining structure for rapidly cooling a furnace and recovering heat stored in the furnace lining according to an embodiment of the present invention installed in a heating furnace;

FIG. 2 is a schematic cross-sectional view of a composite lining in a lining structure for rapidly cooling a furnace and recovering heat from the lining according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

fig. 4 is a schematic cross-sectional view of a composite lining in a lining structure for rapidly cooling a furnace and recovering heat from the lining according to another embodiment of the present invention.

In the figure: 100. heating furnace; 110. a composite furnace lining; 111. an inner insulating layer; 112. an outer insulating layer; 120. a water jacket; 121. steel plates on the inner sides of the steel shells; 122. steel plates on the outer sides of the steel shells; 123. a partition plate; 124. heat exchange fins; 130. a cooling water input header pipe; 140. a cooling water output header pipe; 150. a cooling water input branch pipe; 160. a cooling water output branch pipe; 170. a drain pipe; 180. a cooling water inlet control valve; 190. a cooling water outlet control valve; 200. a drain valve; 210. a cavity.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. 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: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the application usually place when in use, and are used only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the devices or elements being referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present application, it is further noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The characteristics and properties of the lining construction of the present application for rapid furnace cool down and for recovery of the accumulated heat from the lining are described in further detail below with reference to the examples.

As shown in fig. 1, 2 and 3, an embodiment of the present application provides a furnace lining structure capable of rapidly cooling a furnace and recovering heat stored in the furnace lining, which includes a composite furnace lining 110 disposed on an inner wall of a heating furnace 100, a water jacket 120 penetrating through the composite furnace lining 110, a cooling water input header 130, a cooling water output header 140, four cooling water input branch pipes 150 communicating the cooling water input header 130 with a bottom of the water jacket 120, and four cooling water output branch pipes 160 communicating the cooling water output header 140 with a top of the water jacket 120, wherein each cooling water input branch pipe 150 is provided with a cooling water input control valve 180, each cooling water output branch pipe 160 is provided with a cooling water output control valve 190, a bottom of the water jacket 120 is connected with four drain pipes 170, and each drain pipe 170 is provided with a drain valve 200. The composite furnace lining 110 comprises an inner heat insulation layer 111 and an outer heat insulation layer 112 which are connected with the inner wall of the heating furnace 100, the water jacket 120 is respectively connected with the inner heat insulation layer 111 and the outer heat insulation layer 112, the water jacket 120 comprises a steel shell inner side steel plate 121 connected with the inner heat insulation layer 111, a steel shell outer side steel plate 122 connected with the outer heat insulation layer 112, and three partition plates 123 connected with the steel shell inner side steel plate 121 and the steel shell outer side steel plate 122, cavities 210 are respectively formed by enclosing among the steel shell inner side steel plate 121, the steel shell outer side steel plate 122 and the partition plates 123, the steel shell inner side steel plate 121, the steel shell outer side steel plate 122, the partition plates 123 and the inner wall of the heating furnace 100, the bottom end of each cavity 210 is connected with the cooling water input branch pipe 150 and the drain pipe 170, and the bottom end of each cavity 210 is connected with the cooling water output branch pipe 160.

The furnace lining structure capable of rapidly cooling the furnace and recovering the heat storage amount of the furnace lining, provided by the embodiment of the application, fixes the composite furnace lining 110 on the inner wall of the heating furnace 100, when the heating furnace 100 needs to be rapidly cooled, cooling water is respectively introduced into each cavity 210 in the water jacket 120 of the composite furnace lining 110 after being introduced into each cooling water input branch pipe 150 from the cooling water input main pipe 130, when the cooling water passes through each cavity 210 in the water jacket 120, the high-temperature inner heat insulation layer 111 and the outer heat insulation layer 112 which have high temperature and store a large amount of heat exchange heat with the cooling water with lower temperature, and the cooling water which absorbs the temperature rise of the furnace lining heat is collected to the cooling water output main pipe 140 after passing through the cooling water output branch pipes 160 and then is output to hot water users in other processes. When the heating furnace 100 is overhauled, the cooling water inlet control valve 180 and the cooling water outlet control valve 190 are closed, the drain valve 200 is opened to drain the cooling water in each cavity 210 in the water jacket 120, and when the temperature needs to be quickly reduced, an operator can adjust the opening degrees of the cooling water inlet control valve 180 and the cooling water outlet control valve 190 to increase the flow rate of the cooling water, so that the flow rate of the cooling water in the cavities 210 is increased to improve the cooling efficiency.

The composite furnace lining 110 comprises an inner heat insulation layer 111 and an outer heat insulation layer 112 which are connected with the inner wall of the heating furnace 100, the water jacket 120 is respectively connected with the inner heat insulation layer 111 and the outer heat insulation layer 112, the water jacket 120 comprises a steel shell inner side steel plate 121 connected with the inner heat insulation layer 111, a steel shell outer side steel plate 122 connected with the outer heat insulation layer 112 and three partition plates 123 connected with the steel shell inner side steel plate 121 and the steel shell outer side steel plate 122, a cavity 210 is respectively formed by enclosing among the steel shell inner side steel plate 121, the steel shell outer side steel plate 122 and the partition plates 123, and among the steel shell inner side steel plate 121, the steel shell outer side steel plate 122, the partition plates 123 and the inner wall of the heating furnace 100, and when the heating furnace 100 needs to be cooled rapidly, cooling water is introduced into each cavity 210 of the water jacket 120 to flow to rapidly take away the heat storage quantity of the furnace lining so that the temperature of the furnace lining is reduced; when the heating furnace 100 is normally produced, the cooling water inlet control valve 180 and the cooling water outlet control valve 190 are closed, the drain valve 200 is opened to drain the cooling water in each cavity 210 of the water jacket 120, at this time, the water jacket 120 is filled with air, and the air layer in the water jacket 120 plays a role in heat preservation of refractory materials due to the very small thermal conductivity of the air. Because the water jacket 120 is located inside the composite furnace lining 110, the steel plate 121 on the inner side of the steel shell and the steel plate 122 on the outer side of the steel shell are parallel to the surface of the furnace lining and divide the composite furnace lining 110 into the inner heat-insulating layer 111 and the outer heat-insulating layer 112, compared with the common furnace in which the air is in contact with the surface of the furnace lining with only one heat-exchanging surface, the cooling medium in the embodiment of the present application is in contact with the two heat-exchanging surfaces of the inner heat-insulating layer 111 and the outer heat-insulating layer 112 through the surfaces of the steel plate 121 on the inner side of the steel shell and the steel plate 122 on the outer side of the steel shell, so that the heat-exchanging efficiency is doubled.

In an alternative embodiment, as shown in fig. 4, a plurality of heat exchanging fins 124 are respectively connected to the steel plate 121 on the inner side of the steel shell and the steel plate 122 on the outer side of the steel shell. By welding the heat exchange fins 124 to the steel shell inner side steel plate 121 and the steel shell outer side steel plate 122 in the water jacket 120 of the composite furnace lining 110, the heat exchange coefficients of the cooling water and the steel shell inner side steel plate 121, the steel shell outer side steel plate 122, the inner heat insulating layer 111 and the outer heat insulating layer 112 can be further improved, and the cooling time of the heating furnace 100 can be reduced.

The embodiments described above are some, but not all embodiments of the present application. The detailed description of the embodiments of the present application is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. 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.

Claims

1. The furnace lining structure capable of quickly cooling a furnace and recovering heat storage capacity of the furnace lining is characterized by comprising a composite furnace lining arranged on the inner wall of a heating furnace, a water jacket penetrating through the composite furnace lining, a cooling water input header pipe, a cooling water output header pipe, a plurality of cooling water input branch pipes communicated with the cooling water input header pipe and the bottom of the water jacket, and a plurality of cooling water output branch pipes communicated with the cooling water output header pipe and the top of the water jacket, wherein each cooling water input branch pipe is provided with a cooling water inlet control valve, and each cooling water output branch pipe is provided with a cooling water outlet control valve.

2. The furnace lining structure capable of rapidly cooling a furnace and recovering heat accumulated in the furnace lining according to claim 1, wherein the composite furnace lining comprises an inner heat insulating layer and an outer heat insulating layer connected to an inner wall of the heating furnace, and the water jacket is connected to the inner heat insulating layer and the outer heat insulating layer, respectively.

3. The lining structure of claim 2, wherein the water jacket includes an inner steel plate connected to the inner insulating layer, an outer steel plate connected to the outer insulating layer, and a plurality of partition plates connecting the inner steel plate and the outer steel plate, and wherein the inner steel plate, the outer steel plate, and the partition plates enclose a cavity between the inner steel plate and the partition plates, and between the inner steel plate and the outer steel plate, and between the partition plates, and between the inner steel plate and the inner wall of the furnace, the bottom end of the cavity is connected to the cooling water inlet branch pipe, and the bottom end of the cavity is connected to the cooling water outlet branch pipe.

4. A lining structure for a furnace to cool down rapidly and recover heat accumulated in a lining according to claim 3, wherein a plurality of heat exchange fins are attached to the steel plate on the inner side of the steel shell and/or the steel plate on the outer side of the steel shell.

5. The lining structure of claim 1, wherein a plurality of drainage tubes are connected to the bottom of the water jacket, and each drainage tube is provided with a drainage valve.