Natural gas melting furnace lining structure

Abstract

The application provides a natural gas melting furnace lining structure and relates to the technical field of metallurgical manufacturing. The application comprises an outer wall arranged at the side end of a furnace body and a composite layer arranged at the inner side of the outer wall. The composite layer comprises a refractory material layer, a first composite insulation layer and a second composite insulation layer arranged side by side. A first gap layer is arranged between the outer wall and the second composite insulation layer. A second gap layer is arranged between the second composite insulation layer and the first composite insulation layer. A third gap layer is arranged between the first composite insulation layer and the refractory material layer. The first gap layer, the second gap layer and the third gap layer are filled with high-temperature-resistant fire-retardant materials. The refractory material layer and the first composite insulation layer are both circularly arranged along the axial direction. The refractory material layer, the first composite insulation layer and the second composite insulation layer can effectively block the heat source from being transmitted outward, have the effects of aging resistance and corrosion resistance, and effectively prolong the service life of the outer wall steel.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of metallurgical manufacturing technology field, in particular to a kind of natural gas melting furnace lining structure. BACKGROUND

[0002] The blast furnace used by insulation material production line at present stage, mainly with coal and coke as main heat source, furnace structure is single, production technology is backward, and reach modern process production requirement, furnace lining is roughly made, cannot guarantee temperature locking in furnace, make most heat source loss, cause raw material waste, manufacturing cost is substantially increased, the heat source lost can produce sulfur dioxide, carbon dioxide and other harmful gases.In high-temperature long-time operation state, long-time heat source loss can cause damage to outer wall steel, seriously can burn through outer wall, cause major safety production accident. SUMMARY

[0003] For the deficiencies existing in the above problems, the present application provides a kind of natural gas melting furnace lining structure, make it through being provided with refractory layer, first composite insulation layer and second composite insulation layer, it can effectively block heat source to transfer to outside, simultaneously have the effect of anti-aging and corrosion resistance, effectively prolong the service life of outer wall steel.

[0004] In order to solve the above problems, the present application provides a kind of natural gas melting furnace lining structure, including base and the furnace body of setting on the upper end of the base, the upper end of the furnace body is provided with storage bin, the upper end of the storage bin is provided with feed inlet, the right end of the furnace body is provided with discharge port, wherein, it further includes outer wall and composite layer, the outer wall is set in the side end of the furnace body, the composite layer is set in the inner side of the outer wall, the composite layer includes and is arranged in parallel refractory layer, first composite insulation layer and second composite insulation layer, first gap layer is arranged between the outer wall and the second composite insulation layer, second gap layer is arranged between the second composite insulation layer and the first composite insulation layer, third gap layer is arranged between the first composite insulation layer and the refractory layer, high-temperature flame-retardant material is filled in the first gap layer, the second gap layer and the third gap layer, and the refractory layer and the first composite insulation layer are all arranged in the form of circular ring along the axial direction.

[0005] Preferably, the refractory layer includes and is arranged in parallel first refractory layer, second refractory layer and third refractory layer, the first refractory layer adopts carbonaceous refractory material, second refractory layer is high-temperature oxide material, and third refractory layer is high-temperature composite material.

[0006] Preferably, the first composite insulation layer includes and is arranged in parallel first insulation layer, first heat-resistant layer and second insulation layer, the first insulation layer and the second insulation layer all adopt foamed cement, and the first heat-resistant layer adopts inorganic heat-resistant material.

[0007] Preferably, the second composite insulation layer comprises the abrasion-resistant layer, the third insulation layer and the second heat-resistant layer arranged side by side, the abrasion-resistant layer adopts high manganese steel, the third insulation layer adopts foamed cement, and the second heat-resistant layer adopts inorganic heat-resistant material.

[0008] Preferably, the first composite insulation layer adopts a multi-layer winding insulation technology, and plays a vacuumizing role in the inner lining structure, so that the heat source cannot be effectively conducted outward in a vacuum state, thereby strengthening the insulation process.

[0009] Compared with the prior art, the application has the following advantages:

[0010] The application can effectively block the heat source from being conducted outward, has the effects of aging resistance and corrosion resistance, effectively prolongs the service life of the outer wall steel, protects the overall structure of the outer wall, generates a negative pressure state when the furnace is burning, the insulation layer adopts a multi-layer winding insulation technology, plays a vacuumizing role in the inner lining structure, so that the heat source cannot be effectively conducted outward in a vacuum state, thereby strengthening the insulation process, ensuring that the furnace temperature is locked and not easily lost, and saving energy consumption. BRIEF DESCRIPTION OF DRAWINGS

[0011] Fig. 1 is a schematic diagram of the overall structure of the embodiment of the application;

[0012] Fig. 2 is a schematic diagram of the refractory material layer structure of the embodiment of the application;

[0013] Fig. 3 is a schematic diagram of the first composite insulation layer structure of the embodiment of the application;

[0014] Fig. 4 is a schematic diagram of the second composite insulation layer structure of the embodiment of the application. DETAILED DESCRIPTION

[0015] In order to make the purpose, technical scheme and advantages of the application clearer, the application is further described in detail below in combination with the drawings and examples, but the examples are not used as a limitation of the application.

[0016] As Figs. 1 to 4As shown, the embodiment of the present application comprises a base 1 and a furnace body 2 arranged at the upper end of the base 1, the upper end of the furnace body 2 is provided with a storage tank 3, the upper end of the storage tank 3 is provided with a feeding port 4, the right end of the furnace body 2 is provided with a discharging port 5, wherein the two ends of the furnace body 2 are provided with an outer wall 6 and a composite layer, the outer wall 6 is arranged at the side end of the furnace body 2, the composite layer is arranged at the inner side of the outer wall 6, the composite layer comprises a refractory material layer 7, a first composite heat preservation layer 8 and a second composite heat preservation layer 9 arranged side by side, a first gap layer is arranged between the outer wall 6 and the second composite heat preservation layer 9, a second gap layer is arranged between the second composite heat preservation layer 9 and the first composite heat preservation layer 8, and a third gap layer is arranged between the first composite heat preservation layer 8 and the refractory material layer 7, and the first gap layer, the second gap layer and the third gap layer are all filled with high-temperature resistant flame-retardant materials, and the refractory material layer 7 and the first composite heat preservation layer 8 are both arranged in a circular ring shape along the axial direction.

[0017] In the embodiment, the refractory material layer 7 comprises a first refractory material layer 10, a second refractory material layer 11 and a third refractory material layer 12 arranged side by side, the first refractory material layer 10 adopts carbonaceous refractory material, the second refractory material layer 11 is a high-temperature oxide material, and the third refractory material layer 12 is a high-temperature composite material.

[0018] The carbonaceous refractory material includes carbon brick, graphite products and silicon carbide products, has very low thermal expansion coefficient, high thermal conductivity, good heat shock resistance, high high-temperature strength, good resistance to acid, alkali and salt corrosion, especially good resistance to weak acid and alkali, is not wetted by metal and molten slag, and is light in weight. It is widely used as high-temperature furnace lining material and also used as high-pressure autoclave lining in petroleum and chemical industry.

[0019] The high-temperature oxide material includes alumina, lanthana, beryllia, calcia, zirconia, etc. The refractory compound material includes carbide, nitride, boride, silicide and sulfide, etc.

[0020] The high-temperature composite material mainly includes metal ceramic, high-temperature inorganic coating and fiber reinforced ceramic, etc.

[0021] In the embodiment, the first composite heat preservation layer 8 comprises a first heat preservation layer 13, a first heat-resistant layer 14 and a second heat preservation layer 15 arranged side by side, the second composite heat preservation layer 9 comprises a wear-resistant layer 16, a third heat preservation layer 17 and a second heat-resistant layer 18 arranged side by side, the wear-resistant layer 16 adopts high manganese steel, the first heat preservation layer 13, the second heat preservation layer 15 and the third heat preservation layer 17 all adopt foamed cement, and the first heat-resistant layer 14 and the second heat-resistant layer 18 adopt inorganic heat-resistant materials.

[0022] Inorganic material, they are built kiln, combustion chamber and other need to withstand high temperature building materials. Generally use quartz sand, clay, magnesite, dolomite, etc. as raw material and made, high temperature insulation coating made, is a component of inorganic coating, temperature range in -80-1800 ℃, thermal conductivity is 0.03 W / m.K, can inhibit the thermal radiation and conduction of high temperature object and low temperature object, for high temperature object can keep 70% of the heat loss.

[0023] In this embodiment, the first composite insulation layer adopts multi-layer winding insulation technology, and plays a vacuumizing role in the inner lining structure, so that the heat source cannot effectively conduct outward in a vacuum state, thereby enhancing the insulation process.

[0024] In this embodiment, by changing the structure of the inner lining of the natural gas melting furnace, the heat source can be locked and not lost externally, energy can be effectively saved during processing and manufacturing, and production cost can be reduced.

[0025] The heat value loss data is compared with the heat value of ordinary coal, which is usually 5000 large calories per cubic meter. Under normal circumstances, the melting furnace needs to use 1600 kg of coal per hour at full load, and needs to use 16 tons of coal per day for 10 hours. The heat value reached is 800000 large calories, and the heat loss is 40000 large calories.

[0026] Saving 4000 large calories can effectively reduce the emission of toxic gases such as sulfur dioxide and nitrogen oxides, and make due contribution to air environment governance and environmental protection.

[0027] Changing the natural gas melting furnace body inner lining structure device can prolong the service life of the melting furnace, and can save the considerable additional cost.

[0028] Changing the natural gas melting furnace body inner lining structure device can effectively block the heat source, and the safety in use is stably improved. In the full load operation in the production process, the risk of burning the furnace body due to long time operation in high temperature state is avoided. In order to improve the safety performance, the melting furnace adopts combustible gas alarm interlocking device to ensure the safe operation of the melting furnace gas system. The production efficiency is improved, the maintenance time is reduced, and the pollutant emission is reduced. This set of melting equipment has been tested for many times, and various work records data prove that the heat energy cost is reduced, the pollutant emission is reduced, the effect of increasing production and efficiency is achieved. It can be widely used in various metallurgical and manufacturing industries.

[0029] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

[0030] In the description of the present specification, it is understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the purpose of facilitating the description of the technical solutions of the present patent and simplifying the description, and does 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 to the present patent application.

[0031] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present patent application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0032] In the present specification, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present specification can be understood according to the specific circumstances.

[0033] In the present specification, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or it can only mean that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or it can only mean that the horizontal height of the first feature is less than that of the second feature.

[0034] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are contained in at least one embodiment or example of the present application. In the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0035] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary and are not to be construed as limiting the present application, and the person skilled in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of the present application.

Claims

1. A lining structure for a natural gas melting furnace, comprising a base and a furnace body disposed on the upper end of the base, a storage tank disposed on the upper end of the furnace body, a feed inlet disposed on the upper end of the storage tank, and a discharge outlet disposed on the right end of the furnace body, characterized in that, It also includes an outer wall and a composite layer. The outer wall is disposed on the side end of the furnace body, and the composite layer is disposed on the inner side of the outer wall. The composite layer includes a refractory material layer, a first composite insulation layer and a second composite insulation layer arranged side by side. A first gap layer is disposed between the outer wall and the second composite insulation layer. A second gap layer is disposed between the second composite insulation layer and the first composite insulation layer. A third gap layer is disposed between the first composite insulation layer and the refractory material layer. The first gap layer, the second gap layer and the third gap layer are all filled with high-temperature resistant flame-retardant material, and the refractory material layer and the first composite insulation layer are both arranged in a circular shape along the axial direction. The refractory material layer includes a first refractory material layer, a second refractory material layer and a third refractory material layer arranged in parallel. The first refractory material layer is made of carbonaceous refractory material, the second refractory material layer is made of high-temperature oxide material, and the third refractory material layer is made of high-temperature composite material. The first composite insulation layer includes a first insulation layer, a first heat-resistant layer and a second insulation layer arranged in parallel. Both the first insulation layer and the second insulation layer are made of foamed cement, and the first heat-resistant layer is made of inorganic heat-resistant material. The second composite insulation layer includes a wear-resistant layer, a third insulation layer and a second heat-resistant layer arranged in parallel. The wear-resistant layer is made of high manganese steel, the third insulation layer is made of foamed cement, and the second heat-resistant layer is made of inorganic heat-resistant material. The first composite insulation layer adopts multi-layer winding insulation technology, which plays a vacuum role in the inner lining structure, so that the heat source cannot be effectively conducted to the outside in a vacuum state, thereby strengthening the insulation process.

Images