CN209840744U - Novel preheating smoke hood based on Consisti electric arc furnace - Google Patents

Abstract

The utility model discloses a novel preheating smoke hood based on a Consistion electric arc furnace, which comprises a hood body with a horizontal arch channel, wherein the hood body comprises two symmetrically connected transition sections, an arch inner cavity of the transition section comprises a first cavity and a second cavity, the first cavity is provided with a large port and a small port, the small port is communicated with one end of the second cavity into a whole, and the other end of the second cavity is a connecting end of an adjacent transition section; specifically, the second cavities of the adjacent transition sections form a similar waisted structure, the high-temperature flue gas passes through from a large port to a small port, the drift diameter of the inner cavity is gradually reduced, the high-temperature flue gas is further gradually concentrated, the concentrated flowing high-temperature flue gas can be beneficial to carrying out heat radiation on waste steel materials on an online conveyor in a channel, and the preheating effect of the waste steel can be effectively improved; meanwhile, the heat insulation wall layer adopts a multi-layer heat insulation supporting structure form combining the built-in asbestos plate layer and the heat insulation cotton layer, and has the characteristics of simple structure, high reliability, low maintenance cost and good heat insulation effect.

Description

Novel preheating smoke hood based on Consisti electric arc furnace

Technical Field

The utility model relates to a preheat petticoat pipe technical field of constanta electric-arc furnace specifically is a novel preheat petticoat pipe based on constanta electric-arc furnace.

Background

The consdial arc furnace is an energy-saving environment-friendly electric furnace, and is an electric furnace continuous steelmaking method (Consteel process) developed by Intel corporation of America, and is a unique electric furnace steelmaking process, and adopts large steel-retaining quantity, and utilizes molten pool to melt waste steel, and the electric energy utilization rate can be up to about 90%. The preheating mode of horizontal channel for continuously adding preheated scrap steel into electric furnace is a big characteristic of the Consign electric arc furnace, and it can meet the smelting technological requirement of molten steel to melt scrap steel. The preheating process comprises the steps of continuously feeding materials into an electric furnace through a special online conveyor, simultaneously heating the waste steel by high-temperature flue gas flowing reversely through a preheating refractory material hood by using the waste steel conveyor as a flue of a dust removal system, improving the stability of feeding the waste steel into the furnace, producing molten steel in an efficient and rapid smelting period, and being easy to match with continuous casting.

The horizontal channel preheating refractory material hood of the prior art constantin electric arc furnace exists: 1) clay bricks are generally adopted for building, so that the service life is short, the maintenance frequency is high, and the maintenance cost is high; 2) the traditional preheating refractory material smoke hood has poor heat insulation effect and large heat loss, and the horizontal flow form of the smoke of the straight-through channel structure has poor heat radiation or heat transfer to scrap steel and low preheating effect.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, an object of the utility model is to provide a can effective increase of service life, reduce the maintenance cost, and can effectively improve the novel petticoat pipe that preheats based on consdi electric-arc furnace who preheats the effect.

In order to achieve the above purpose, the technical scheme of the utility model is as follows:

a novel preheating smoke hood based on a Consisti electric arc furnace comprises a hood body with a horizontal arched channel, wherein two ports of the hood body are respectively connected with an input end and an output end of high-temperature smoke, and the hood body comprises two transition sections which are symmetrically connected;

the arched inner cavity of the transition section comprises a first cavity and a second cavity, the first cavity is provided with a large port and a small port which are unequal in vertical height, the large port and the small port are arched, the difference point is that the large port and the small port are unequal in vertical height, the small port is communicated with one end of the second cavity into a whole, and the other end of the second cavity is a connecting end of the adjacent transition section;

the transition section is made of a heat-insulating wall layer forming an arched inner cavity.

Furthermore, the heat preservation wall layer comprises a supporting inner layer, an asbestos plate layer, a heat preservation cotton layer and a supporting outer shell layer from inside to outside in sequence.

Further, the supporting inner layer and the supporting outer shell layer are both made of iron plates.

Further, the thickness of the heat preservation wall layer is not less than 0.2 m.

Furthermore, a reinforcing rib is arranged on the outer wall of the cover body;

the strengthening rib includes that a plurality of cover body horizontal settings and be the horizontal muscle of arch and vertically just set up the muscle of indulging at cover body top along the cover body, a plurality of horizontal muscle are towards the vertical interval setting of the cover body, and a plurality of horizontal muscle suit with the outer wall that corresponds input section, interlude and the output section that sets up.

Furthermore, the reinforcing ribs are inverted U-shaped channel irons, and two ends of each U-shaped channel iron are welded with the outer wall of the cover body.

Further, the connection terminal surface between the adjacent changeover portion and between changeover portion and input and the output all is equipped with the sealing layer, the sealing layer includes heat preservation cotton and asbestos cloth, the cotton for packing the nexine that keeps warm, the asbestos cloth is the cotton cladding of heat preservation skin.

Further, the number of the cover bodies is 2 or 3, wherein the ports of the adjacent cover bodies are mutually connected in series.

Further, the number of the second cavities is 2-4, and the ports of the adjacent second cavities are mutually connected in series.

Further, the maximum inner top height of the small port is 0.4m-1.2 m.

The utility model relates to a novel beneficial effect of preheating the petticoat pipe based on Consisti electric arc furnace:

the technical scheme is that the novel preheating smoke hood based on the Consiste electric arc furnace comprises a hood body with a horizontal arched channel, wherein the hood body comprises two symmetrically connected transition sections, an arched inner cavity of each transition section comprises a first cavity and a second cavity, the first cavity is provided with a large port and a small port which are unequal in vertical height, the small ports are integrally communicated with one end of the second cavity, and the other end of each second cavity is a connecting end of an adjacent transition section; specifically, the second cavity of the adjacent transition section of the utility model forms a similar waist-contracting structure form of the whole horizontal arch-shaped channel, the high-temperature flue gas passes from a big port to a small port, the drift diameter of the inner cavity is gradually reduced, and then the high-temperature flue gas is gradually concentrated, and the high-temperature flue gas can flow downwards in an inclined manner along the inclined transition top wall, the concentrated flowing high-temperature flue gas can be favorable for carrying out heat radiation or heat transfer on waste steel materials on an online conveyor in the channel, and the preheating effect of the waste steel can be effectively improved; meanwhile, the heat insulation wall layer adopts a multi-layer heat insulation supporting structure form combining a built-in asbestos plate layer and a heat insulation cotton layer, and has the characteristics of simple structure, high reliability, low maintenance cost and good heat insulation effect.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

Fig. 1 is a schematic structural view of the embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of the input section of FIG. 1;

FIG. 3 is a schematic diagram of the longitudinal center section structure of the transition section of the present invention;

FIG. 4 is a schematic left side view of the structure of FIG. 3;

fig. 5 is a schematic structural view of a heat insulation wall layer according to an embodiment of the present invention;

FIG. 6 is a schematic view of the flow of high temperature flue gas in the arched channel according to the embodiment of the present invention;

fig. 7 is a first schematic structural diagram of another embodiment of the present invention;

fig. 8 is a schematic structural diagram ii according to another embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings.

It is to be noted that unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.

In the description of the present application, it is to be understood that the terms "upper", "lower", "horizontal", "lateral", "longitudinal", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in fig. 1, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be taken as limiting the present invention.

As shown in fig. 1 to 6, a novel preheating smoke hood based on a consdi electric arc furnace includes a hood body having a horizontal arched channel, specifically, a high temperature smoke 7 is in an arch shape through an inner cavity or channel of the hood body, the arch shape structure can be understood by combining with the attached drawings or a known arch bridge, which is not described herein, two ports of the hood body are respectively connected with an input end 1 and an output end 3 of the high temperature smoke, and the hood body includes two symmetrically connected transition sections 2.

The arched inner cavity of the transition section comprises a first cavity 21 and a second cavity 22, the first cavity is provided with a large port 211 and a small port 212 which are unequal in vertical height, the large port and the small port are arch-shaped, the difference point is that the large port and the small port are unequal in vertical height, the small port is communicated with one end of the second cavity into a whole, the other end of the second cavity is a connecting end of the adjacent transition section, and it can be understood that the top wall which is transited from the large port to the small port is arranged obliquely downwards, namely, a transitional connection structure which is obliquely downwards is arranged between the top wall of the large port and the top wall of the small port.

In this embodiment, as shown in fig. 1, 3, and 6, the second cavities of the adjacent transition sections form a similar waisted structure of the whole horizontal arched passage, that is, the passing aperture of the second cavity is smaller than that of the first cavity (large port) or the input section, and the high-temperature flue gas gradually converges toward the small port after passing through the input end to the large port of the first cavity, passes through the second cavity, and sequentially flows from the second cavity of the adjacent transition section and the first cavity to the output end. Wherein, the transition section is made by the heat preservation wall layer 4 who forms the arch inner chamber, and heat preservation wall layer can play thermal-insulated or the heat loss effect to the high temperature flue gas. It can be understood that, the high temperature flue gas is following big port to port process, the inner chamber latus rectum reduces gradually, and then make the high temperature flue gas concentrate gradually, and enable the high temperature flue gas to be the downward flow of slope along foretell slope transition roof, thereby the invariable flow form of level of the high temperature flue gas of traditional horizontal passageway has been changed, and the high temperature flue gas of concentrating the flow downwards can do benefit to and carry out more deep flow through to the useless steel material on the online cargo airplane in the passageway, and then improved heat radiation or heat transfer capacity, the effect of preheating of steel scrap has effectively been improved.

As a preferred technical scheme, the heat-insulating wall layer sequentially comprises a supporting inner layer 41, an asbestos plate layer 42, a heat-insulating cotton layer 43 and a supporting outer shell layer 44 from inside to outside; the asbestos plate is an asbestos fiber cement plate for short, and is produced by using materials such as asbestos, glass fiber, argil and the like according to a scientific formula. The material has strong tension resistance, pressure bearing capacity, high-temperature bearing capacity and corrosion resistance, and is commonly used in the fields of heat insulation, heat preservation and sound insulation, boilers and iron and steel plants; the heat-insulating cotton is a non-toxic, harmless and pollution-free novel heat-insulating material prepared from high-purity clay clinker, alumina powder, silica powder, chrome sand and other raw materials, and has the characteristics of light weight, oxidation resistance, low thermal conductivity, good flexibility, corrosion resistance, small heat capacity, sound insulation and the like. Specifically, double heat-insulating materials of an asbestos plate layer and a heat-insulating cotton layer are additionally arranged in a traditional supporting shell layer, so that the heat-insulating capacity is effectively improved, and the supporting inner layer is an inner layer of an arched channel or a layer contacting with high-temperature smoke; preferably, the supporting inner layer and the supporting outer shell layer are both made of iron plates, and the iron plates have good rigidity strength, low manufacturing cost and strong high-temperature resistance; the bearing inner layer needs to resist the erosion and corrosion of high-temperature (more than 900 ℃) smoke, the bearing outer shell layer is preferably a cast iron plate, the bearing outer shell layer is a main bearing structure of the cover body, therefore, adjacent iron plates are preferably formed by welding to ensure the sealing performance and the structural strength, the cast iron plate serving as the bearing inner layer is laid on the asbestos plate layer, the connection mode can be disassembled through the threads of the connecting piece, and the connecting piece can penetrate through the asbestos plate layer and the heat-insulating cotton layer to be fixedly connected with the bearing outer shell layer. Preferably, the thickness of the heat-insulating wall layer is not less than 0.2m, so that the heat-insulating effect is improved while the structural strength of the heat-insulating wall layer is ensured.

As a preferred technical scheme, the outer walls of the cover bodies are provided with reinforcing ribs 5; the strengthening rib includes that a plurality of edge cover body transversely sets up and be arched horizontal muscle 51 and along the cover body vertically and set up the muscle 52 of indulging at the cover body top, a plurality of horizontal muscle are towards the vertical interval setting of the cover body. Preferably, the reinforcing rib is an inverted U-shaped channel iron, and two ends of the U-shaped channel iron are welded with the outer wall of the cover body, so that the reinforcing rib plays a role in reinforcing and supporting the supporting shell layer or the heat insulation wall layer.

As an optimal technical scheme, the connection end faces between adjacent transition sections and between the transition sections and the input end and the output end are respectively provided with a sealing layer 6, the sealing layers comprise heat preservation cotton and asbestos cloth (not shown in the figure), the heat preservation cotton is a filling lining layer, the asbestos cloth is a heat preservation cotton coating outer layer, the heat preservation sealing mode that the heat preservation cotton is combined with the asbestos cloth can effectively guarantee the sealing and heat insulation connection of two ports of the transition sections.

As a preferred technical scheme, the maximum inner top height of the small port is 0.4m-1.2m, such as 0.6m, 0.8m and 1.0m, and the specific height is adaptively set according to the discharge capacity of the flue gas and the external dimension of the on-line conveyor, so that the passing requirement of the on-line conveyor can be met while the high-temperature flue gas smoothly passes through the on-line conveyor, and meanwhile, in order to further improve the concentrated flow time of the high-temperature flue gas and improve the heat transfer efficiency, the sum of the lengths of the second cavities of the two transition sections is preferably not less than 6 m.

In order to more effectively utilize the heat of the high-temperature flue gas or improve the preheating effect of the steel scrap, the number of the shields connected in series (as shown in fig. 7) can be increased and the length of the second cavity (as shown in fig. 8) can be increased or prolonged, for example, the number of the shields is preferably 2 or 3, or the number of the second cavities is preferably 2 to 4, wherein the ports of the adjacent second cavities are connected in series; the number of times and the flowing time of the high-temperature flue gas concentrated flowing are increased, so that the heat radiation or heat transfer capacity of the high-temperature flue gas is effectively improved, the preheating effect of the scrap steel is improved, and the selection can be specifically set according to the field space and the actual requirement.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification.

Claims (10)

1. The utility model provides a novel preheat petticoat pipe based on consdi electric arc furnace, is including the cover body that has horizontal arch passageway, two ports of the cover body are connected its characterized in that with input (1) and output (3) of high temperature flue gas respectively: the cover body comprises two transition sections (2) which are symmetrically connected;

the arched inner cavity of the transition section comprises a first cavity (21) and a second cavity (22), the first cavity is provided with a large port (211) and a small port (212) which are unequal in vertical height, the small port is communicated with one end of the second cavity into a whole, and the other end of the second cavity is a connecting end of an adjacent transition section;

the transition section is made of a heat insulation wall layer (4) forming an arched inner cavity.

2. The Consumer arc furnace-based novel pre-heating hood according to claim 1, characterized in that: the heat-insulating wall layer sequentially comprises a supporting inner layer (41), an asbestos plate layer (42), a heat-insulating cotton layer (43) and a supporting outer shell layer (44) from inside to outside.

3. The Consumer arc furnace-based novel pre-heating hood according to claim 2, characterized in that: the supporting inner layer and the supporting outer shell layer are both made of iron plates.

4. The Consumer arc furnace-based novel pre-heating hood according to claim 2, characterized in that: the thickness of the heat preservation wall layer is not less than 0.2 m.

5. The Consumer arc furnace-based novel pre-heating hood according to claim 1, characterized in that: the outer wall of the cover body is provided with a reinforcing rib (5);

the strengthening rib includes that a plurality of edge cover body transversely set up and be arched horizontal muscle (51) and vertically just set up indulging muscle (52) at cover body top along the cover body, a plurality of horizontal muscle are towards the vertical interval setting of the cover body.

6. The Consumer arc furnace-based novel pre-heating hood according to claim 5, characterized in that: the reinforcing rib is a reversed U-shaped channel iron, and two ends of the U-shaped channel iron are welded with the outer wall of the cover body.

7. The Consumer arc furnace-based novel pre-heating hood according to claim 1, characterized in that: the connection terminal surface between the adjacent changeover portion and between changeover portion and input and the output all is equipped with sealing layer (6), the sealing layer includes heat preservation cotton and asbestos cloth, the cotton for packing the nexine that keeps warm, the asbestos cloth is the cotton cladding of heat preservation outer.

8. The Consumer arc furnace-based novel pre-heating hood according to claim 1, characterized in that: the number of the cover bodies is 2 or 3, wherein the ports of the adjacent cover bodies are mutually connected in series.

9. The Consumer arc furnace-based novel pre-heating hood according to claim 1, characterized in that: the number of the second cavities is 2-4, and the ports of the adjacent second cavities are mutually connected in series.

10. The new preheated hood based on consdi electric arc furnace according to any one of claims 1-9, characterized in that: the maximum inner top height of the small port is 0.4m-1.2 m.