CN212800413U - Spray cooling system for smelting reduction furnace - Google Patents

Abstract

The utility model provides a spray cooling system for a smelting reduction furnace, which comprises a cooling liquid conveying subsystem, a cooling liquid spraying subsystem and a cooling liquid recovery subsystem which are connected in sequence; the cooling liquid conveying subsystem is provided with a conveying pipeline; the cooling liquid spraying subsystem is provided with a spraying pipeline, the spraying pipeline is connected with the conveying pipeline, the spraying pipeline is annularly sleeved outside the smelting reduction furnace, a plurality of nozzles are arranged on the spraying pipeline, and the spraying range of the nozzles covers the smelting reduction furnace; the cooling liquid recycling subsystem is provided with a recycling groove, the recycling groove is positioned below the spraying pipeline, and the recycling groove surrounds the outer surface of the melting reduction furnace and is connected with the outer surface. The utility model discloses a spray cooling system can carry out the spray cooling of full overlay type to the external surface of smelting reduction furnace body, has prevented effectively that local high temperature overheat area's problem from appearing in the smelting reduction furnace body in the production operation to avoided appearing wearing the stove accident, reduced the potential safety hazard of enterprise.

Description

Spray cooling system for smelting reduction furnace

Technical Field

The utility model relates to a metallurgical technical field of smelting reduction especially relates to a spray cooling system for smelting reduction furnace.

Background

The HIsmelt smelting reduction metallurgy process is one of smelting reduction metallurgy technologies which realize industrial production, is the only smelting reduction metallurgy new technology which does not use coke and sinter at present, and belongs to the leading-edge technology of the current metallurgy field. The HIsmelt reduction metallurgy process utilizes non-coking coal powder and iron ore powder to produce liquid pig iron by adopting a spray metallurgy mode, has the characteristics of short flow, low pollution, good molten iron quality and the like, and is an advanced metallurgy technology for solving the problems of limited coking coal resources and environmental protection.

The core of the HIsmelt process is the SRV smelting reduction furnace. The local temperature of the combustion reaction zone at the upper part of the smelting reduction furnace can reach 1800 ℃, and no refractory material can be stably used in the high-temperature environment for a long time at present, so a cooling device is required to be arranged outside the smelting reduction furnace.

At present, the furnace body of the combustion reaction zone in the upper part of the molten reduced slag zone is usually cooled by using a water wall. Because the water wall is installed outside the smelting reduction furnace in a sheet mode, installation gaps exist among the water wall sheets, and the water wall sheets are not protected by refractory materials. In normal production operation, the local over-high temperature of the furnace body is easy to occur in the area of the gap between the two water-cooling wall sheets on the smelting reduction furnace, and even the furnace-passing accident can be caused when the condition is serious. After a steel furnace body of the smelting reduction furnace is burnt through, cooling liquid outside the smelting reduction furnace can possibly enter the furnace to contact with high-temperature molten iron, so that explosion is easily caused, and great potential safety hazards exist for enterprises.

Accordingly, there is a need to design a spray cooling system for a smelting reduction furnace that overcomes and ameliorates one or more of the above-mentioned disadvantages of the prior art by a reasonable structural design and piping layout, or at least to provide an effective alternative to the above-mentioned problems.

SUMMERY OF THE UTILITY MODEL

Aiming at the defects, the embodiment of the utility model provides a spray cooling system for a smelting reduction furnace. The application provides a spray cooling system for smelting reduction furnace can cover the external surface of smelting reduction furnace body comprehensively and force the cooling to reduced the overheated condition of local high temperature of smelting reduction furnace body effectively, avoided wearing the stove accident, reduced the potential safety hazard of enterprise.

The utility model discloses a realize through following technical scheme:

a spray cooling system for a smelting reduction furnace, comprising:

the cooling liquid conveying subsystem, the cooling liquid spraying subsystem and the cooling liquid recovery subsystem are connected in sequence; wherein the cooling liquid conveying subsystem is provided with a conveying pipeline; the cooling liquid spraying subsystem is provided with a spraying pipeline, the spraying pipeline is connected with the conveying pipeline, the spraying pipeline is annularly sleeved outside the melting reduction furnace, a plurality of nozzles are arranged on the spraying pipeline, and the spraying range of the nozzles covers the melting reduction furnace; the cooling liquid recycling subsystem is provided with a recycling groove, the recycling groove is located below the spraying pipeline, and the recycling groove surrounds the outer surface of the melting reduction furnace and is connected with the outer surface.

In a preferred implementation, the conveying pipe is provided with a plurality of conveying branch pipes; the spraying pipeline is provided with a plurality of sections of spraying pipe joints, the number of the sections of spraying pipe joints is the same as that of the conveying branch pipes, the plurality of sections of spraying pipe joints are respectively connected with the plurality of conveying branch pipes, the spraying pipe joints are arc-shaped, and the plurality of sections of spraying pipe joints are integrally sleeved outside the melting reduction furnace in an end-to-end mode.

Furthermore, the spraying pipeline is provided with four sections of spraying pipe joints, each section of spraying pipe joint is in a 90-degree arc shape, the distance between each two adjacent sections of spraying pipe joints and the melting reduction furnace is different, and the four sections of spraying pipe joints are arranged in a staggered mode.

In any one of the above preferred implementations, the shower pipe joint is uniformly provided with a plurality of nozzles, the nozzles are fan-shaped, and the nozzles are 90 ° to the outer surface of the smelting reduction furnace.

In a preferred implementation manner, the cooling liquid spraying subsystem at least comprises two sets of spraying pipelines, one of the two sets of spraying pipelines is arranged at the top of the smelting reduction furnace, and the other one of the two sets of spraying pipelines is arranged at the upper part of a furnace body straight cylinder section of the smelting reduction furnace.

In a preferred implementation manner, the cooling liquid delivery subsystem further includes a detection device, the detection device is disposed on the spray pipe, and the detection device at least includes one of a pressure detection device, a temperature detection device, and a flow detection device; and/or the cooling liquid conveying subsystem further comprises a pipeline on-off device, and the pipeline on-off device is arranged on the spraying pipeline and used for controlling the on-off of the cooling liquid.

In a preferred implementation manner, the cooling liquid recovery subsystem further comprises an anti-overflow groove, the anti-overflow groove is arranged on the outer side of the recovery groove and connected with the recovery groove, and a horizontal included angle between the anti-overflow groove and the recovery groove is 45-75 degrees.

In a preferred implementation mode, the inner surface and the outer surface of the recovery tank are both provided with an antirust layer; and/or the inner surface and the outer surface of the anti-overflow groove are both provided with anti-rust layers.

In a preferred implementation, the coolant recovery subsystem is disposed in an upper portion of the molten reduced slag zone.

In any one of the above preferred implementations, the spray cooling system further includes a heat extraction device, the heat exchange device is disposed between the cooling liquid recovery subsystem and the cooling liquid delivery subsystem, and the heat extraction device is configured to extract heat in the cooling liquid recovered by the cooling liquid recovery subsystem and deliver the cooled cooling liquid to the cooling liquid delivery subsystem.

Through the embodiment of the utility model provides a technical scheme can reach following beneficial effect:

1. according to the spray cooling system for the smelting reduction furnace, provided by the embodiment of the application, the spray pipeline is arranged in the cooling liquid spray subsystem, and the spray pipeline is designed to surround the outside of the smelting reduction furnace by 360 degrees, so that the outer surface of the furnace body of the smelting reduction furnace can be comprehensively covered and cooled. The problem that the furnace body is locally high-temperature overheated easily due to the existence of an installation gap in the existing water-cooled wall cooling technology, and the furnace penetration accident is easily caused is solved, and the potential safety hazard in production is reduced.

2. According to the spray cooling system for the smelting reduction furnace, the spray pipeline is designed into the multi-section spray joints, so that the cooling liquid can be uniformly sprayed on the outer surface of the smelting reduction furnace, and the situation that the outer surface of the smelting reduction furnace is difficult to uniformly cool due to the fact that the temperature of the cooling liquid is raised due to the fact that the conveying pipeline is too long is avoided.

3. According to the spray cooling system for the smelting reduction furnace, the spray pipeline is of a four-section type spray pipe joint structure, a plurality of nozzles are uniformly arranged on each section of spray pipe joint, and the outer surface of the furnace body can be uniformly covered by the plurality of nozzles by adjusting the position distance between the spray pipe joints and the outer surface of the furnace body and the angle between the nozzles and the outer surface of the furnace body.

4. According to the spray cooling system for the smelting reduction furnace, provided by the embodiment of the application, one set of spray pipeline is arranged on the combustion chamber at the top of the SRV furnace, and the other set of spray pipeline is arranged on the upper part of the straight cylinder section of the SRV furnace, so that the smelting reduction furnace can be better subjected to full-coverage spray cooling.

5. The spray cooling system for the smelting reduction furnace in the embodiment of the application is further provided with a heat extraction device, and a closed-loop cooling liquid circulating spray cooling mode is adopted, so that the cooling liquid can be cooled and then recycled.

Drawings

The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are provided for explaining the invention without unduly limiting it. In the drawings:

fig. 1 is a schematic view illustrating a structure of a spray cooling system for a smelting reduction furnace according to an embodiment of the present invention;

fig. 2 is a top view illustrating a schematic structure of a shower pipe according to an embodiment of the present invention;

fig. 3 is a top view for illustrating another schematic structure of the shower pipe according to the embodiment of the present invention;

FIG. 4 is a top view of a schematic diagram illustrating a coolant recovery subsystem in an embodiment of the invention;

fig. 5 is a schematic view illustrating another structure of a spray cooling system for a smelting reduction furnace according to an embodiment of the present invention.

Reference numerals:

10-a conveying pipeline; 11-conveying branch pipes; 12-a pressure detection device; 13-temperature detection means; 14-a flow detection device; 15-a pipe on-off device;

20-a spray pipeline; 21-spray pipe joints, 22-nozzles;

30-a coolant recovery subsystem; 31-a recovery tank and 32-an anti-overflow tank;

40-a heat extraction device;

90-a smelting reduction furnace; 91-slag zone.

Detailed Description

In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.

First, the technical concept of the present invention will be explained. The HIsmel t smelting reduction metallurgy process is one of the leading technologies in the metallurgy field at present. Due to the particularity of the HIsmelt smelting reduction metallurgy process, the SRV smelting reduction furnace is in a high-temperature and high-pressure working environment for a long time, the temperature is up to 1400 ℃, and the pressure is up to 60-80 Kpa. The existing cooling equipment can not ensure that the smelting reduction furnace is in a stable operation state for a long time. Moreover, since the refractory is eroded by the high-temperature and high-speed gas flow in the smelting reduction furnace, the refractory cannot be added to the upper combustion reaction zone of the smelting reduction furnace.

At present, the outer surface of the smelting reduction furnace is cooled by a water wall. However, since the waterwalls are installed in a sheet outside the melting reduction furnace, there is an installation gap between the waterwalls. Therefore, the local overhigh temperature is easy to occur in the area of the gap between the water-cooling wall sheets on the smelting reduction furnace in the production operation process, and even the furnace penetrating accident can be caused in serious conditions. If a steel furnace body of the smelting reduction furnace has a furnace penetrating accident, the cooling liquid outside the steel furnace body can enter the furnace to contact with high-temperature molten iron, so that explosion is easily caused, and great potential safety hazards exist for enterprises.

In view of the above problems existing in the prior art, the utility model provides a novel a spray cooling system for smelting reduction furnace carries out comprehensive cover forced cooling to the smelting reduction furnace body surface, avoids the local high temperature overheat zone that appears of furnace body to reduced and worn the stove accident, solved the potential safety hazard.

The specific scheme is as follows:

as shown in fig. 1, the present embodiment provides a spray cooling system for a smelting reduction furnace 90, which comprises a cooling liquid delivery subsystem, a cooling liquid spray subsystem and a cooling liquid recovery subsystem connected in sequence. Wherein, the cooling liquid conveying subsystem is provided with a conveying pipeline 10; the cooling liquid spraying subsystem is provided with a spraying pipeline 20, the spraying pipeline 20 is connected with the conveying pipeline 10, the spraying pipeline 20 is annularly sleeved outside the smelting reduction furnace 90, a plurality of nozzles 22 are arranged on the spraying pipeline 20, and the spraying range of the nozzles 22 covers the smelting reduction furnace 90; the cooling liquid recovery subsystem is provided with a recovery tank which is positioned below the spray pipe 20, surrounds the outer surface of the smelting reduction furnace 90 and is connected with the outer surface.

Through setting up spray piping 20 to design into 360 outside surrounding smelting reduction furnace 90 with spray piping 20, can the smelting reduction furnace 90 furnace body surface carry out comprehensive cover cooling protection, avoided current water-cooling wall cooling technology to cause the local high temperature of furnace body overheated easily because of having the installation gap, arouse the problem of wearing the stove accident easily, reduced the potential safety hazard in the production.

In this embodiment, the arrangement of the conveying pipeline 10 can be implemented by one of the following embodiments:

embodiment 1: as shown in fig. 2, the shower pipe 20 is annularly sleeved outside the smelting reduction furnace 90, a plurality of nozzles 22 are provided on the shower pipe 20, and a shower range of the nozzles 22 covers the smelting reduction furnace 90.

Embodiment 2: as shown in fig. 3, the shower pipe 20 is provided with a plurality of shower joints 21, the shower joints 21 are circular, and the shower joints 21 are integrally sleeved outside the smelting reduction furnace 90 in an end-to-end manner. Correspondingly, the conveying pipeline 10 is provided with a plurality of conveying branch pipes 11, and the multi-segment shower pipe joint 21 is respectively connected with the plurality of conveying branch pipes 11.

The spray pipeline 20 is designed into a multi-section spray joint, so that the cooling liquid can be uniformly sprayed on the outer surface of the smelting reduction furnace 90, and the condition that the outer surface of the smelting reduction furnace 90 is difficult to uniformly cool due to the fact that the temperature of the cooling liquid is increased due to the fact that the conveying pipeline 10 is too long is avoided.

The preferred embodiment is as follows: the spray pipeline 20 is provided with four spray pipe joints 21, each spray pipe joint 21 is in a 90-degree circular arc shape, the distance between the adjacent two spray pipe joints 21 and the melting reduction furnace 90 is different, and the four spray pipe joints 21 are arranged in a staggered mode.

A four-section type spray pipe joint 21 structure is adopted, a plurality of nozzles 22 are uniformly arranged on each section of spray pipe joint 21, and the outer surface of the furnace body can be uniformly covered by the plurality of nozzles 22 by adjusting the position distance between the spray pipe joint 21 and the outer surface of the furnace body and the angle between the nozzles 22 and the outer surface of the furnace body.

In this embodiment, each shower joint 21 is uniformly provided with a plurality of nozzles 22, the nozzles 22 are fan-shaped, and the nozzles 22 are arranged at an angle of 90 ° with respect to the outer surface of the smelting reduction furnace 90.

Further, in this embodiment, the arrangement manner of the cooling liquid spraying subsystem may be implemented by one of the following implementation manners:

embodiment 1: the cooling liquid spraying subsystem only comprises a set of spraying pipelines 20, and the spraying pipelines 20 are arranged at the top of the smelting reduction furnace 90.

Embodiment 2: as shown in fig. 1, the cooling liquid spray subsystem includes two sets of spray pipes 20, one of the two sets of spray pipes 20 is disposed at the top of the smelting reduction furnace 90, and the other of the two sets of spray pipes 20 is disposed at the upper portion of the furnace body straight cylinder section of the smelting reduction furnace 90. By providing two sets of spray pipes 20, the smelting reduction furnace 90 can be better cooled by full-coverage spray cooling.

It is understood that the cooling liquid spray subsystem may further include a plurality of sets of spray pipes 20 according to different design requirements, and the plurality of sets of spray pipes 20 are respectively disposed at different heights outside the smelting reduction furnace 90 as long as the outer surface of the smelting reduction furnace 90 can be effectively and fully cooled and covered.

In this embodiment, the cooling liquid delivery subsystem further includes a detection device disposed on the spray pipe 20. The detection means may for example comprise one or more of a pressure detection means 12, a temperature detection means 13, a flow detection means 14. Preferably, the pressure detection device 12 employs a pressure transmitter; the temperature detection device 13 adopts a thermal resistor; the flow rate detecting means 14 employs an electromagnetic flowmeter.

The cooling liquid conveying subsystem further comprises a pipeline on-off device 15, and the pipeline on-off device 15 is arranged on the spraying pipeline 20 and used for controlling on-off of the cooling liquid. Preferably, the pipe switching device 15 employs a shut-off valve.

In this embodiment, as shown in fig. 4, the coolant recovery subsystem further includes an anti-overflow groove disposed outside the recovery groove and connected to the recovery groove, and a horizontal included angle between the anti-overflow groove and the recovery groove is 45 ° to 75 °. Through setting up anti-overflow groove, can effectively prevent the excessive of coolant liquid.

Preferably, the inner surface and the outer surface of the recovery tank are both provided with an anti-rust layer, and the inner surface and the outer surface of the anti-overflow tank are both provided with an anti-rust layer.

In this embodiment, the coolant recovery subsystem is disposed in the upper portion of the slag zone 91 of the smelting reduction furnace 90. The interior of the furnace body below the slag zone 91 of the smelting reduction furnace 90 is a hearth iron bath zone, and the furnace body is protected by refractory materials, so that the surface of the furnace body does not need spray cooling.

In this embodiment, as shown in fig. 5, the spray cooling system further includes a heat extraction device 40, the heat exchange device is disposed between the cooling liquid recovery subsystem and the cooling liquid delivery subsystem, and the heat extraction device 40 is configured to extract heat in the cooling liquid recovered by the cooling liquid recovery subsystem and deliver the cooled cooling liquid to the cooling liquid delivery subsystem. Preferably, the heat extraction device 40 employs an air cooler. The heat extraction device 40 is arranged to recycle the cooling liquid, and a closed-loop cooling liquid circulating spray cooling mode is adopted, so that the cooling device is more environment-friendly and reduces the cost.

In order to facilitate understanding of the present invention, the fine ore recycling system suitable for the smelting reduction process is further described below:

a spray cooling system for a smelting reduction furnace 90 comprises a cooling liquid conveying subsystem, a cooling liquid spraying subsystem and a cooling liquid recycling subsystem which are sequentially connected.

And the cooling liquid, namely demineralized water, is conveyed to the cooling liquid spraying subsystem through a cooling liquid circulating pump arranged in the cooling liquid conveying subsystem. Wherein, the cooling liquid conveying subsystem is provided with 2 cooling liquid circulating pumps, and the motor power of each circulating pump is 37 KW. During normal production, one of the 2 circulating pumps works, and the other circulating pump is standby. An electric stop valve and an electric gate valve are respectively arranged on a pump front pipeline of each circulating pump, and the total liquid supply flow of the cooling liquid conveying subsystem is adjusted by adjusting the opening of the valves.

The total liquid supply pressure of the conveying pipeline 10 in the cooling liquid conveying subsystem is 500-1500KPa, and the total liquid supply amount is 30-80m³And/h, the diameters of the liquid inlet main pipeline and the liquid return main pipeline are DN200 mm.

The conveying pipeline 10 is respectively provided with a pressure detection device 12, a temperature detection device 13, a flow detection device 14 and other instrument devices which meet the standard requirements, and the pressure detection device, the temperature detection device, the flow detection device and other instrument devices respectively collect and monitor signals of the pressure, the temperature, the flow and the like of the liquid supply system. Meanwhile, a pipeline on-off device 15 is also installed on the conveying pipeline 10 to control the on-off of the cooling liquid conveying pipeline 10.

Wherein, pressure measurement 12 adopts pressure transmitter, and pressure transmitter's range is 0-1.6MPa, exports: 4-20mA for measuring the pressure of the delivery pipe 10; the temperature detection device 13 adopts a thermal resistor, the thermal resistor adopts a wear-resistant platinum thermal resistor Pt100, the measuring range is 0-100 ℃, and the temperature detection device is used for measuring the temperature of the cooling liquid in the conveying pipeline 10; the flow detection device 14 adopts an electromagnetic flowmeter, the range of the electromagnetic flowmeter is 0-100t/h, a power supply 220VAC50Hz, a transducer outputs a FIELDBUS signal, and the operating temperature: 30-75 ℃, minimum conductivity: 20mS/cm for measuring the flow of the cooling liquid in the delivery pipe 10; the pipeline on-off device 15 adopts a stop valve, the stop valve is a pneumatic butterfly valve, the size of the stop valve is DN200, the stop valve is provided with a valve position indicator, and an electromagnetic valve coil supplies power for 24 DC.

The cooling liquid spraying subsystem comprises two sets of spraying pipelines 20, wherein one set of spraying pipelines is positioned at the top of the SRV smelting reduction furnace 90 and is used for spraying and cooling a combustion chamber at the top of the SRV furnace and a furnace body taper pipe section; the other sleeve is positioned at the upper part of the straight cylinder section of the furnace body and is used for carrying out spray cooling on the straight cylinder section of the SRV furnace.

The two sets of spraying pipelines 20 adopt the same four-section type spraying pipe joint 21 to spray and cool the outer surface of the furnace body. Each set of spray pipe 20 is provided with four sections of spray pipe joints 21, each section of spray pipe joint 21 is arc-shaped, the radian is 90 degrees, and the spray pipe joints 21 are made of galvanized stainless steel pipes and have the size of 55 multiplied by 6. The distances between the two adjacent sections of spray pipe joints 21 and the smelting reduction furnace 90 are different, and the four sections of spray joints are arranged near the smelting reduction furnace 90 with the distance of 200-800mm in a staggered manner.

A plurality of nozzles 22 are uniformly arranged on each section of the spray pipe joint 21 through threaded connection. The nozzle 22 is a standard brass fan nozzle 22 with a spray angle of 85 ° and a thread size of 3/8 ". The distance and the angle between the spray pipe joint 21 and the outer surface of the furnace body are adjusted to ensure that the spray nozzle 22 forms 90 degrees with the outer surface of the furnace body.

Preferably, 7 spray nozzles 22 are installed on each shower pipe joint 21, so that each spray nozzle 22 can cover the range of 15 degrees of the outer surface of the furnace body.

After the cooling liquid is sprayed onto the SRV smelting reduction furnace 90, the outer surface of the furnace body is cooled in a covering manner by its own weight. Then enters a water return pipeline through a cooling liquid recovery subsystem. Then the cooling liquid enters the cooling liquid circulating pump again for circulating cooling after being cooled by the heat extraction device 40.

The cooling liquid recovery subsystem is divided into two parts, including a recovery tank and an anti-overflow tank. Wherein the recycling tank is made of stainless steel and has the size of phi 120 multiplied by 6, and is vertically welded on the outer surface of the SRV smelting reduction furnace 90, and the upper surface and the lower surface of the recycling tank are sprayed with anti-rust layers. 12 water outlets are uniformly distributed on the recovery tank, and the size of the water outlets is phi 50 mm. The lower parts of the water outlets are respectively connected with a water return branch pipe, and then the water return branch pipes are converged into an annular water return pipeline and returned to the heat extraction device 40 through the water return pipeline for cooling. The overflow-preventing groove is made of stainless steel material, the size is 200 multiplied by 6, and the upper surface and the lower surface are sprayed with anti-rust layers. The overflow-preventing groove is welded on the outer side of the recovery groove, and the horizontal included angle between the overflow-preventing groove and the recovery groove is 45-75 degrees, so that the overflow of the cooling liquid can be effectively prevented.

The heat extraction device 40 employs an air cooler equipped with 4 fan motors and 2 air cooler line pumps. In the normal production process, two of the 4 fan motors work, the other two fan motors are standby, the power of each fan motor is 15KW, and the rotating speed is 580 r/min; one of the 2 air cooler pipeline water pumps works, the other one is standby, the power of each water pump motor is 15KW, and the rotating speed is 2980 r/min.

The utility model can be realized by adopting or using the prior art for reference in places which are not mentioned in the utility model.

The above embodiments are only specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of various changes or substitutions within the technical scope of the present invention, which should be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do 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, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "square," and "over" the second feature includes the first feature being directly above 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 above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.

The above disclosure provides many different embodiments or examples for implementing different features of the invention. In order to simplify the disclosure of the present invention, the components and arrangements of the specific examples are described above. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or reference letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed. In addition, the present disclosure provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

Claims (10)

1. A spray cooling system for a smelting reduction furnace, comprising:

the cooling liquid conveying subsystem, the cooling liquid spraying subsystem and the cooling liquid recovery subsystem are connected in sequence; wherein the content of the first and second substances,

the cooling liquid conveying subsystem is provided with a conveying pipeline;

the cooling liquid spraying subsystem is provided with a spraying pipeline, the spraying pipeline is connected with the conveying pipeline, the spraying pipeline is annularly sleeved outside the melting reduction furnace, a plurality of nozzles are arranged on the spraying pipeline, and the spraying range of the nozzles covers the melting reduction furnace;

the cooling liquid recycling subsystem is provided with a recycling groove, the recycling groove is located below the spraying pipeline, and the recycling groove surrounds the outer surface of the melting reduction furnace and is connected with the outer surface.

2. The blast furnace tuyere cooling system for a smelting reduction furnace according to claim 1, wherein:

the conveying pipeline is provided with a plurality of conveying branch pipes;

the spraying pipeline is provided with a plurality of sections of spraying pipe joints, the number of the sections of spraying pipe joints is the same as that of the conveying branch pipes, the plurality of sections of spraying pipe joints are respectively connected with the plurality of conveying branch pipes, the spraying pipe joints are arc-shaped, and the plurality of sections of spraying pipe joints are integrally sleeved outside the melting reduction furnace in an end-to-end mode.

3. The blast furnace tuyere cooling system for a smelting reduction furnace according to claim 2, wherein:

the spraying pipeline is provided with four sections of spraying pipe joints, each section of spraying pipe joint is in a 90-degree arc shape, the distance between each two adjacent sections of spraying pipe joints and the melting reduction furnace is different, and the four sections of spraying pipe joints are arranged in a staggered mode.

4. The blast furnace tuyere cooling system for a smelting reduction furnace according to claim 2 or claim 3, wherein:

a plurality of nozzles are uniformly arranged on the spray pipe joints, the nozzles are fan-shaped, and the nozzles and the outer surface of the smelting reduction furnace form 90 degrees.

5. The blast furnace tuyere cooling system for a smelting reduction furnace according to claim 1, wherein:

the cooling liquid spraying subsystem at least comprises two sets of spraying pipelines, one of the two sets of spraying pipelines is arranged at the top of the smelting reduction furnace, and the other one of the two sets of spraying pipelines is arranged at the upper part of a furnace body straight cylinder section of the smelting reduction furnace.

6. The blast furnace tuyere cooling system for a smelting reduction furnace according to claim 1, wherein:

the cooling liquid conveying subsystem further comprises a detection device, the detection device is arranged on the spray pipeline and at least comprises one of a pressure detection device, a temperature detection device and a flow detection device; and/or

The cooling liquid conveying subsystem further comprises a pipeline on-off device, and the pipeline on-off device is arranged on the spraying pipeline and used for controlling the on-off of the cooling liquid.

7. The blast furnace tuyere cooling system for a smelting reduction furnace according to claim 1, wherein:

the cooling liquid recovery subsystem further comprises an anti-overflow groove, the anti-overflow groove is arranged on the outer side of the recovery groove and connected with the recovery groove, and a horizontal included angle between the anti-overflow groove and the recovery groove is 45-75 degrees.

8. The blast furnace tuyere cooling system for a smelting reduction furnace according to claim 7, wherein:

the inner surface and the outer surface of the recovery tank are both provided with an anti-rust layer; and/or

And anti-rust layers are arranged on the inner surface and the outer surface of the anti-overflow groove.

9. The blast furnace tuyere cooling system for a smelting reduction furnace according to claim 1, wherein:

the coolant recovery subsystem is disposed at an upper portion of the molten reduced slag zone.

10. The blast furnace tuyere cooling system for a smelting reduction furnace according to claim 1, wherein:

the spray cooling system further comprises a heat extraction device, the heat extraction device is arranged between the cooling liquid recovery subsystem and the cooling liquid conveying subsystem, and the heat extraction device is used for extracting heat in the cooling liquid recovered by the cooling liquid recovery subsystem and conveying the cooled cooling liquid to the cooling liquid conveying subsystem.

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