CN213475877U

CN213475877U - Ethylene cracking furnace and heat insulation lining thereof

Info

Publication number: CN213475877U
Application number: CN202022632411.6U
Authority: CN
Inventors: 崔希村; 闫玉坤; 李克然; 张传根; 王红
Original assignee: Luyang Energy Saving Materials Co Ltd
Current assignee: Luyang Energy Saving Materials Co Ltd
Priority date: 2020-11-12
Filing date: 2020-11-12
Publication date: 2021-06-18
Anticipated expiration: 2030-11-12

Abstract

The utility model discloses a heat insulation lining, which comprises a flat laying layer and an inorganic fiber prefabricated layer fixed on the flat laying layer; through with the inboard tiling of tiling layer laminating furnace inner wall for the furnace inside lining is level and smooth, and the setting of tiling layer has increased thermal-insulated ability simultaneously, and the prefabricated layer of cooperation inorganic fiber improves the thermal-insulated ability of heating furnace, and then has reduced giving off of heat in the heating furnace, can effective energy saving. And the prefabricated layer of inorganic fiber is including the prefabricated subassembly of inorganic fiber who sets up side by side, and the prefabricated subassembly of inorganic fiber passes through anchor assembly and tiling layer fixed connection, and the connected mode is simpler, firm, therefore the baker flow when can saving ethylene pyrolysis furnace construction has shortened construction cycle to the performance of enterprises has been improved. The present application also provides an ethylene cracking furnace including the above thermal liner, and having the above advantages.

Description

Ethylene cracking furnace and heat insulation lining thereof

Technical Field

The utility model relates to an industrial furnace field, concretely relates to thermal-insulated lining. The utility model discloses still relate to an ethylene cracking furnace who has above-mentioned thermal-insulated lining.

Background

The cracking furnace is an energy-consuming large household of the ethylene device, and the energy consumption of the cracking furnace accounts for 50-60% of the total energy consumption of the device. By reasonably selecting the full-fiber lining material and adopting the novel full-fiber energy-saving lining, the heat efficiency of the cracking furnace is improved, the heat recovery of high-temperature cracking gas is improved, the running period is prolonged, and the energy consumption of the cracking furnace is reduced.

In the prior art, refractory bricks or castable materials are generally adopted for heat insulation, but the refractory bricks and the castable materials have the structural problems of large heat conductivity coefficient, close distance between a brick supporting plate and a hearth hot surface and the like. In addition, the refractory bricks and the castable need to be baked after construction is completed, so that the construction period is prolonged, and the enterprise benefit is influenced.

Therefore, how to avoid the influence of the furnace baking process on the enterprise benefit is a technical problem which needs to be solved urgently by the technical personnel in the field.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a thermal-insulated lining, its inorganic fiber prefabricated layer links to each other through anchor assembly with the level layer, need not the baker after the construction is accomplished, and then has shortened construction period. Another object of the present invention is to provide an ethylene cracking furnace comprising the above thermal insulation lining.

In order to achieve the above object, the utility model provides a thermal-insulated lining for ethylene cracking furnace, include for laminating furnace inner wall setting, with the flattening layer that increases furnace inner wall roughness, be fixed in the prefabricated layer of inorganic fiber of flattening layer, the prefabricated layer of inorganic fiber includes a plurality of inorganic fiber prefabricated component that set up side by side, the prefabricated component of inorganic fiber pass through anchor assembly with layer fixed connection tiles.

Preferably, the lay-up layer is a composite layer formed by compressing the refractory material to a predetermined thickness.

Preferably, a preset gap is formed between two adjacent inorganic fiber prefabricated components, and a compensation strip is arranged in the preset gap.

Preferably, the compensation strip comprises a ceramic fiber blanket and a staple used for the ceramic fiber blanket, and two staple points of the staple are respectively stapled to the adjacent inorganic fiber prefabricated components.

Preferably, the anchoring member comprises a connecting rod, one end of the rod is fixed to the flat layer, and the other end of the anchoring member is prefabricated into the inorganic fiber and the component.

The utility model also provides an ethylene cracking furnace, including any one of the aforesaid thermal-insulated lining.

Preferably, the heat insulation lining is arranged in the upper part of a radiation chamber of the ethylene cracking furnace, the upper part of the radiation chamber comprises the upper part of a furnace wall, the top of the furnace and the inner wall of a cross section, and the heat insulation lining, the top of the furnace wall and the inner wall of the cross section are arranged in the upper part of the radiation chamber.

The technical scheme has the following beneficial effects:

the heat insulation lining provided by the utility model comprises a flat layer and an inorganic fiber prefabricated layer fixed on the flat layer; through with the inboard tiling of tiling layer laminating furnace inner wall for the furnace inside lining is level and smooth, and the setting of tiling layer has increased thermal-insulated ability simultaneously, and the prefabricated layer of cooperation inorganic fiber improves the thermal-insulated ability of heating furnace, and then has reduced giving off of heat in the heating furnace, can effective energy saving. And the prefabricated layer of inorganic fiber is including the prefabricated subassembly of inorganic fiber who sets up side by side, and the prefabricated subassembly of inorganic fiber passes through anchor assembly and tiling layer fixed connection, and the connected mode is simpler, firm, therefore the baker flow when can saving ethylene pyrolysis furnace construction has shortened construction cycle to the performance of enterprises has been improved.

The present application also provides an ethylene cracking furnace including the above thermal liner, and having the above advantages.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic structural view of a thermal liner according to an embodiment of the present invention;

wherein:

1-a flat layer, 2-an inorganic fiber prefabricated component, 3-an anchoring part and 4-a compensation strip.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In order to make the technical field of the present invention better understand, the present invention will be described in detail with reference to the accompanying drawings and the detailed description.

Referring to fig. 1, fig. 1 is a schematic structural view of a thermal insulation liner according to an embodiment of the present invention.

The utility model provides a be used for thermal-insulated lining includes the level and lays layer 1 and fixes the prefabricated layer of inorganic fiber on the side of level 1 towards furnace. Wherein, the tiling layer 1 accessible sets up at parts such as furnace inner wall weld nail and the inner wall fixed connection of furnace. After the arrangement of the leveling layer 1 is finished, the hearth lining can be leveled, and the inorganic fiber prefabricated layer can be conveniently laid and fixed. Meanwhile, the heat insulation capability of the heat insulation lining can be improved by the aid of the flat laying layer 1, heat insulation is performed by the aid of the inorganic fiber prefabricated layer, and dissipation of heat in the heating furnace is reduced, so that energy is effectively saved.

Referring to fig. 1, in an embodiment of the present invention, the flat layer 1 is formed by compressing a plurality of heat-resistant materials, and the flat layer 1 is made of different materials and different temperature levels of heat-resistant materials to a certain thickness according to different laying positions, and is temporarily fixed by a quick card. The inorganic fiber prefabricated layer is formed by splicing a plurality of inorganic fiber prefabricated components 2, the inorganic fiber prefabricated components 2 have good heat insulation and fire resistance, and heat loss can be remarkably reduced, so that the heat utilization rate of the hearth is improved, and fuel consumption is reduced.

Alternatively, the lay-flat layer 1 may be made by compressing a plurality of refractory materials, and in one embodiment of the present application, the lay-flat layer 1 includes two ceramic fiber blankets and a nano-plate therebetween. The ceramic fiber blanket and the nano plate are compressed to 30-50 mm. Of course, the user can also adopt other fire-resistant heat preservation materials such as aluminium foil in tiling layer 1 as required, and the thickness of inorganic fiber prefabricated layer also can set for by oneself as required.

The inorganic fiber prefabricated layer comprises a plurality of inorganic fiber prefabricated components 2, and the inorganic fiber prefabricated components 2 are prefabricated into shapes which are usually rectangular or square and are convenient to splice. A plurality of inorganic fiber prefabricated components 2 are arranged on one side, facing the hearth, of the flat laying layer 1 in a side-by-side structure, so that good joints are formed among the whole rows of the flat laying layer 1, and heat loss is reduced.

The flat layer 1 and the inorganic fiber prefabricated component 2 are connected through an anchoring piece 3. Specifically, anchor assembly 3 can specifically be the connecting rod, and the one end of connecting rod is prefabricated in inorganic fiber prefabricated component 2, and the other end of connecting rod passes through the nut to be fixed at spreading layer 1 and furnace inner wall. In addition, the embedded depth of the anchoring piece 3 is smaller than the thickness of the inorganic fiber prefabricated component 2, the end part of the anchoring piece 3 is embedded in the inorganic fiber prefabricated component 2, and after the inorganic fiber prefabricated component 2 is laid, the anchoring piece 3 is not contacted with flame and hot air in a hearth, so that the heat loss generated by the anchoring piece 3 through heat conduction is reduced.

In addition, the inorganic fiber prefabricated components 2 are heated to shrink, and a preset gap is formed between every two adjacent inorganic fiber prefabricated components 2 to avoid the shrinkage of the inorganic fiber prefabricated layers. In order to avoid heat loss along the preset gap, the compensation strip 4 is arranged in the preset gap, and the compensation strip 4 can fill and compensate the joint between the adjacent inorganic fiber prefabricated components 2, so that heat dissipation is reduced.

Alternatively, the compensation strips 4 may be made of an inorganic fiber blanket, such as a ceramic fiber blanket, which is folded into a long strip shape, the folded inorganic fiber blanket is compressed into a predetermined thickness, and is cut into a plurality of long strips having a predetermined length, and then the long strips of the inorganic fiber blanket are filled into the predetermined gaps. The compensation strips may be secured by fasteners of U-shaped configuration, such as staples. Specifically, the two ends of the U-shaped nail are nailed on the adjacent inorganic fiber precast blocks, so that the U-shaped nail is spanned on the preset gap, and the middle part of the U-shaped nail is used for limiting the strip-shaped ceramic fiber blanket. In order to improve the limiting effect and avoid the compensation strip 4 from falling off from the preset gap, a plurality of U-shaped nails can be arranged along the length direction of the preset gap. Of course, the user may also use a single inorganic fiber blanket or a multi-layer inorganic fiber blanket, which is not limited herein.

The installation process of the heat insulation lining is as follows: firstly, laying a leveling layer 1 on the inner wall of a hearth, arranging compensation strips 4 between the inorganic fiber prefabricated components 2, and then splicing and fixing the inorganic fiber prefabricated components 2 on the leveling layer 1 through anchoring parts 3.

The utility model also provides an ethylene cracking furnace, including the thermal-insulated lining that any above-mentioned embodiment provided. Specifically, the heat insulation lining is arranged on the upper part of the furnace wall of the inner wall of the hearth to protect the upper furnace wall, the furnace top and the cross section, so that the heat loss can be effectively reduced.

In the embodiment, the tiled layer 1 can make up for unevenness of the inner wall of the hearth, so that the mounting surface of the inorganic fiber prefabricated component 2 is flat, meanwhile, the inorganic fiber component has certain adjustability during mounting, the flatness of a furnace lining can be well guaranteed, good seams are formed among rows due to the parallel arrangement structure, and heat loss is reduced. The anchoring piece 3 is far away from the hot surface, so that the heat loss caused by the high heat conductivity of metal is effectively reduced, the material of the anchoring piece 3 is reduced, and the cost of metal pieces is reduced. The upper part of the furnace wall of the ethylene cracking furnace is arranged on the heat insulation lining, so that the light and fibrous heat insulation layer on the inner wall of the hearth is realized, the furnace drying is not needed, the heating furnace is convenient to design, produce and construct, the heat insulation effect is improved, and the service life of the heating furnace is prolonged.

It is noted that, in this specification, relational terms such as first and second, and the like are used solely to distinguish one entity from another entity without necessarily requiring that any such actual relationship or order exist between the entities.

The heating furnace and the heat insulating lining for the inner wall of the hearth provided by the utility model are described in detail above. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims

1. The utility model provides a thermal-insulated lining for ethylene cracking furnace, its characterized in that, including be used for laminating furnace inner wall setting, in order to increase the flattening layer (1) of furnace inner wall roughness, be fixed in the prefabricated layer of inorganic fiber of flattening layer (1), the prefabricated layer of inorganic fiber includes a plurality of inorganic fiber prefabricated component (2) that set up side by side, inorganic fiber prefabricated component (2) through anchor assembly (3) with flattening layer (1) fixed connection.

2. Thermal insulation lining according to claim 1, characterized in that the laying layer (1) is embodied as a composite layer of refractory material compressed to a predetermined thickness.

3. The thermal insulation lining according to claim 1, wherein a preset gap is formed between two adjacent inorganic fiber prefabricated components, and a compensation strip (4) is arranged in the preset gap.

4. Thermal insulation lining according to claim 3, characterized in that the compensation strips (4) comprise a ceramic fiber blanket and staples for the ceramic fiber blanket, the two staple points of the staples being respectively stapled to the adjacent inorganic fiber preform modules (2).

5. Thermal lining according to any one of claims 1 to 4, characterized in that said anchoring elements (3) comprise tie rods, one end of which is fixed to said laying layer (1) and the other end of said anchoring elements (3) is pre-made in said inorganic fibre and assembly (2).

6. An ethylene cracking furnace comprising the thermal lining according to any one of claims 1 to 5.

7. The ethylene cracking furnace of claim 6, wherein the heat insulating lining is provided on an upper portion of a radiant chamber of the ethylene cracking furnace, the upper portion of the radiant chamber comprising an upper furnace wall portion, a furnace top portion, and an inner wall of the cross section, all of which are provided with the heat resistant lining.