CN116294595B - A natural gas melting furnace lining structure - Google Patents

A natural gas melting furnace lining structure

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Publication number
CN116294595B
CN116294595B CN202111570751.3A CN202111570751A CN116294595B CN 116294595 B CN116294595 B CN 116294595B CN 202111570751 A CN202111570751 A CN 202111570751A CN 116294595 B CN116294595 B CN 116294595B
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China
Prior art keywords
layer
composite
insulation layer
refractory material
heat
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CN202111570751.3A
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CN116294595A (en
Inventor
袁晶晶
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Panjin Hongpeng Renewable Resources Technology Co ltd
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Panjin Hongpeng Renewable Resources Technology Co ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B14/00—Crucible or pot furnaces
    • F27B14/08—Details specially adapted for crucible or pot furnaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D1/00—Casings; Linings; Walls; Roofs
    • F27D1/0003—Linings or walls
    • F27D1/0006—Linings or walls formed from bricks or layers with a particular composition or specific characteristics
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B14/00—Crucible or pot furnaces
    • F27B14/08—Details specially adapted for crucible or pot furnaces
    • F27B2014/0843—Lining or casing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27M—INDEXING SCHEME RELATING TO ASPECTS OF THE CHARGES OR FURNACES, KILNS, OVENS OR RETORTS
    • F27M2003/00—Type of treatment of the charge
    • F27M2003/13—Smelting
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/10—Reduction of greenhouse gas [GHG] emissions
    • Y02P10/143—Reduction of greenhouse gas [GHG] emissions of methane [CH4]

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)

Abstract

本发明提供一种天然气融化炉体内衬结构，涉及一种冶金制造技术领域。该发明包括外壁和复合层，外壁设置在炉体的侧端，复合层设置在外壁的内侧，复合层包括并列设置的耐火材料层、第一复合保温层和第二复合保温层，外壁与第二复合保温层之间设置有第一间隙层，第二复合保温层和第一复合保温层之间设置有第二间隙层，第一复合保温层和耐火材料层之间设置有第三间隙层，第一间隙层、第二间隙层和第三间隙层中均填充有耐高温阻燃材料，并且耐火材料层和第一复合保温层均沿轴向呈圆环形设置。本发明通过设置有耐火材料层、第一复合保温层和第二复合保温层，使其能够有效阻断热源向外传到,同时具有耐老化耐腐蚀作用,有效延长外壁钢材使用寿命。

This invention provides a lining structure for a natural gas melting furnace, relating to the field of metallurgical manufacturing technology. The invention includes an outer wall and a composite layer. The outer wall is located at the side end of the furnace body, and the composite layer is located 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 provided between the outer wall and the second composite insulation layer, a second gap layer is provided between the second and first composite insulation layers, and a third gap layer is provided between the first composite insulation layer and the refractory material layer. All three gap layers are filled with high-temperature resistant and flame-retardant material, and both the refractory material layer and the first composite insulation layer are arranged in a circular shape along the axial direction. By incorporating the refractory material layer, the first composite insulation layer, and the second composite insulation layer, this invention effectively blocks heat transfer to the outside, while also providing aging and corrosion resistance, effectively extending the service life of the outer wall steel.

Description

Lining structure of natural gas melting furnace body
Technical Field
The invention relates to the technical field of metallurgical manufacturing, in particular to a lining structure of a natural gas melting furnace body.
Background
The cupola furnace mainly uses coal and coke as main heat sources, the furnace body structure is single, the production technology is behind, the production requirement of the modern technology is met, the furnace body lining is rough, the temperature locking in the furnace cannot be ensured, most of the heat sources are lost, the raw materials are wasted, the manufacturing cost is greatly increased, and the lost heat sources can generate harmful gases such as sulfur dioxide, carbon dioxide and the like. Under the high-temperature long-time running state, the long-time heat source loss can damage the steel of the outer wall, and the outer wall can be burnt through seriously, so that serious safety production accidents are caused.
Disclosure of Invention
Aiming at the defects in the problems, the invention provides the lining structure of the natural gas melting furnace body, which can effectively block the heat source from being transmitted outwards through the refractory material layer, the first composite heat-insulating layer and the second composite heat-insulating layer, has the ageing-resistant and corrosion-resistant effects, and effectively prolongs the service life of the steel on the outer wall.
In order to solve the problems, the invention provides a natural gas melting furnace body lining structure, which comprises a base and a furnace body arranged at the upper end of the base, wherein a storage box is arranged at the upper end of the furnace body, a feed inlet is arranged at the upper end of the storage box, a discharge outlet is arranged at the right end of the furnace body, the natural gas melting furnace body lining structure further comprises an outer wall and a composite layer, the outer wall is arranged at the side end of the furnace body, the composite layer is arranged at the inner side of the outer wall, the composite layer comprises a refractory material layer, a first composite heat-insulating layer and a second composite heat-insulating layer which are arranged in parallel, a first gap layer is arranged between the outer wall and the second composite heat-insulating layer, a second gap layer is arranged between the second composite heat-insulating layer and the first composite heat-insulating layer, a third gap layer is arranged between the first composite heat-insulating 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 flame-retardant materials, and the refractory material layer and the first composite heat-insulating layer are arranged in a circular shape along the axial direction.
Preferably, the refractory material layer comprises a first refractory material layer, a second refractory material layer and a third refractory material layer which are arranged in parallel, wherein the first refractory material layer adopts a carbonaceous refractory material, the second refractory material layer is a high-temperature oxide material, and the third refractory material layer is a high-temperature composite material.
Preferably, the first composite heat-insulating layer comprises a first heat-insulating layer, a first heat-resistant layer and a second heat-insulating layer which are arranged in parallel, wherein the first heat-insulating layer and the second heat-insulating layer are both made of foamed cement, and the first heat-resistant layer is made of inorganic heat-resistant materials.
Preferably, the second composite heat-insulating layer comprises a wear-resisting layer, a third heat-insulating layer and a second heat-resisting layer which are arranged in parallel, wherein the wear-resisting layer is made of high manganese steel, the third heat-insulating layer is made of foamed cement, and the second heat-resisting layer is made of inorganic heat-resisting materials.
Preferably, the first composite heat-insulating layer adopts a multilayer winding heat-insulating technology, and has a vacuumizing effect in the lining structure, so that the heat source cannot effectively conduct the external conduction technology in a vacuum state, and the heat-insulating technology is enhanced.
Compared with the prior art, the invention has the following advantages:
The invention can effectively block the heat source from being transmitted outwards through the refractory material layer, the first composite heat-insulating layer and the second composite heat-insulating layer, has the ageing-resistant and corrosion-resistant effects, effectively prolongs the service life of the steel on the outer wall, protects the integral structure of the outer wall, generates a negative pressure state when in combustion in the furnace, and simultaneously adopts a multi-layer winding heat-insulating technology to realize vacuumizing effect in the lining structure, so that the heat source cannot effectively conduct the heat source outwards in a vacuum state, thereby strengthening the heat-insulating technology, ensuring the temperature locking in the furnace to be difficult to run off and saving energy consumption.
Drawings
FIG. 1 is a schematic overall structure of an embodiment of the present invention;
FIG. 2 is a schematic view of the structure of a refractory layer according to an embodiment of the present invention;
FIG. 3 is a schematic view of a first composite insulation layer according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a second composite insulation layer according to an embodiment of the present invention.
Detailed Description
The present invention will be further described in detail with reference to the drawings and examples, which are not intended to limit the invention, in order to make the objects, technical solutions and advantages of the present invention more apparent.
As shown in fig. 1 to 4, an embodiment of the invention comprises a base 1 and a furnace body 2 arranged at the upper end of the base 1, wherein a storage tank 3 is arranged at the upper end of the furnace body 2, a feed inlet 4 is arranged at the upper end of the storage tank 3, a discharge outlet 5 is arranged at the right end of the furnace body 2, 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 and comprises a refractory material layer 7, a first composite heat-insulating layer 8 and a second composite heat-insulating layer 9 which are arranged in parallel, a first gap layer is arranged between the outer wall 6 and the second composite heat-insulating layer 9, a second gap layer is arranged between the second composite heat-insulating layer 9 and the first composite heat-insulating layer 8, a third gap layer is arranged between the first composite heat-insulating layer 8 and the refractory material layer 7, high-temperature-resistant flame-retardant materials are filled in the first gap layer, the second gap layer and the third gap layer and the refractory material layer 7 and the first composite heat-insulating layer 8 are all arranged in a circular shape along the axial direction.
In this embodiment, the refractory layer 7 includes a first refractory layer 10, a second refractory layer 11 and a third refractory layer 12 that are disposed in parallel, where the first refractory layer 10 is made of a carbonaceous refractory material, the second refractory layer 11 is a high-temperature oxide material, and the third refractory layer 12 is a high-temperature composite material.
The carbonaceous refractory materials comprise carbon bricks, graphite products and silicon carbide products, and have the advantages of low thermal expansion coefficient, high thermal conductivity, good thermal shock resistance, high-temperature strength, acid-base and salt corrosion resistance, especially weak acid-base resistance, no wetting by metal and slag and light weight. It is widely used as high-temperature furnace lining material and also used as the inner lining of high-pressure kettle in petroleum and chemical industry.
High temperature oxide materials such as alumina, lanthana, beryllia, calcia, zirconia, etc., refractory compound materials such as carbides, nitrides, borides, silicides, sulfides, etc.
The high-temperature composite material mainly comprises metal ceramic, high-temperature inorganic coating, fiber reinforced ceramic and the like.
In this embodiment, the first composite insulation layer 8 includes a first insulation layer 13, a first heat-resistant layer 14 and a second insulation layer 15 that are disposed in parallel, the second composite insulation layer 9 includes a wear-resistant layer 16, a third insulation layer 17 and a second heat-resistant layer 18 that are disposed in parallel, high manganese steel is used for the wear-resistant layer 16, foamed cement is used for the first insulation layer 13, the second insulation layer 15 and the third insulation layer 17, and inorganic heat-resistant materials are used for the first heat-resistant layer 14 and the second heat-resistant layer 18.
Inorganic materials, which are building kiln, combustion chamber and other building materials needing high temperature resistance. The heat-resistant and heat-insulating coating is prepared from quartz sand, clay, magnesite, dolomite and the like, is a component inorganic coating, has a temperature resistance range of-80-1800 ℃ and a heat conductivity coefficient of 0.03W/m.K, can inhibit heat radiation and heat conduction of high-temperature objects and low-temperature objects, and can keep 70% of heat for the high-temperature objects without loss.
In this embodiment, the first composite insulation layer adopts a multilayer winding insulation technology, and performs a vacuumizing function in the lining structure, so that the heat source cannot effectively conduct the external conduction technology in a vacuum state, thereby enhancing the insulation process.
In the embodiment, the structure composition is changed by researching and developing the inner lining of the natural gas melting furnace body, so that the heat source is locked from losing outwards, the energy is effectively saved in the processing and manufacturing process, and the production cost is reduced.
The heat value loss data is compared with the heat value of common coal, which is usually 5000 kilocalories per cubic meter, 1600kg of coal is needed in each hour of full-load work under normal conditions of the melting furnace, 16 tons of coal is needed in 10 hours per day, and the heat value is 800000 kilocalories of heat loss and 40000 kilocalories of heat loss.
The energy-saving 4000 large card can effectively reduce the emission of toxic gases such as sulfur dioxide, nitrogen oxides and the like, and makes a contribution to atmospheric environment treatment and environmental protection industry.
The service life of the melting furnace can be prolonged by changing the lining structure device of the natural gas melting furnace body, so that the extra cost can be saved.
The device for changing the lining structure of the natural gas melting furnace body is stably improved in use safety due to effective blocking of a heat source, and avoids the risk of burning through the furnace body when the device is operated in a high-temperature state for a long time under full-load operation in the production process. In order to improve the safety performance, the melting furnace adopts a combustible gas alarm interlocking device to ensure the safe operation of a melting furnace gas system. The production efficiency is improved, the shutdown maintenance time is reduced, and the pollutant discharge amount is reduced. The set of melting equipment is subjected to multiple trial production, and various work record data prove that the heat energy cost is reduced, the pollutant discharge is reduced, and the effects of increasing yield and improving efficiency are achieved. Can be widely applied to various metallurgy and manufacturing industries.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
In the description of the present specification, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the technical solutions of the present patent and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present patent application.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present patent application, the meaning of "plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise.
In the present specification, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, directly connected, indirectly connected via an intermediate medium, or in communication between two elements or in interaction with each other, unless explicitly stated otherwise. The specific meaning of the above terms in this specification will be understood by those of ordinary skill in the art in view of the specific circumstances.
In this specification, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives, and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.

Claims (1)

1.一种天然气融化炉体内衬结构，包括底座和设置在所述底座上端的炉体，所述炉体上端设置有储料箱，所述储料箱上端设置有进料口，所述炉体的右端设置有出料口，其特征在于，还包括外壁和复合层，所述外壁设置在所述炉体的侧端，所述复合层设置在所述外壁的内侧，所述复合层包括并列设置的耐火材料层、第一复合保温层和第二复合保温层，所述外壁与所述第二复合保温层之间设置有第一间隙层，所述第二复合保温层和所述第一复合保温层之间设置有第二间隙层，所述第一复合保温层和所述耐火材料层之间设置有第三间隙层，所述第一间隙层、所述第二间隙层和所述第三间隙层中均填充有耐高温阻燃材料，并且所述耐火材料层和所述第一复合保温层均沿轴向呈圆环形设置；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 bin disposed on the upper end of the furnace body, a feed inlet disposed on the upper end of the storage bin, and a discharge outlet disposed on the right end of the furnace body, characterized in that it further comprises an outer wall and a composite layer, the outer wall being disposed on the side end of the furnace body, the composite layer being disposed on the inner side of the outer wall, the composite layer comprising a refractory material layer, a first composite insulation layer and a second composite insulation layer disposed in parallel, a first gap layer being disposed between the outer wall and the second composite insulation layer, a second gap layer being disposed between the second composite insulation layer and the first composite insulation layer, and a third gap layer being disposed between the first composite insulation layer and the refractory material layer, wherein 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; 所述耐火材料层包括并列设置的第一耐火材料层、第二耐火材料层和第三耐火材料层，所述第一耐火材料层采用碳质耐火材料，第二耐火材料层为高温氧化物材料，第三耐火材料层为高温复合材料；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. 所述第一复合保温层包括并列设置的第一保温层、第一耐热层和第二保温层，所述第一保温层和所述第二保温层均采用发泡水泥，所述第一耐热层采用无机物耐热材料；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. 所述第二复合保温层包括并列设置的耐磨层、第三保温层和第二耐热层，所述耐磨层采用高锰钢，所述第三保温层均采用发泡水泥，所述第二耐热层采用无机物耐热材料；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. 所述第一复合保温层采用多层缠绕保温技术,在内衬结构中起到抽真空作用,使热源在真空状态下无法有效对外传导技术,从而加强保温工艺。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.
CN202111570751.3A 2021-12-21 2021-12-21 A natural gas melting furnace lining structure Active CN116294595B (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN205561552U (en) * 2016-04-19 2016-09-07 辽宁都市建设有限公司 Electric heat energy memory's multilayer cavity insulation construction
CN209763754U (en) * 2019-04-04 2019-12-10 贵溪鑫发实业有限公司 Lining of scrap steel smelting furnace

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2546215B1 (en) * 2011-07-11 2017-05-31 SGL Carbon SE Composite refractory for an inner lining of a blast furnace

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN205561552U (en) * 2016-04-19 2016-09-07 辽宁都市建设有限公司 Electric heat energy memory's multilayer cavity insulation construction
CN209763754U (en) * 2019-04-04 2019-12-10 贵溪鑫发实业有限公司 Lining of scrap steel smelting furnace

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