CN218345487U - Blast furnace shaft air supply device and blast furnace shaft blowing air supply equipment - Google Patents

Abstract

The utility model belongs to the technical field of blast furnace low carbon smelting, especially relate to a blast furnace shaft air supply arrangement and blast furnace shaft jetting air supply equipment. Blast furnace shaft air supply arrangement includes reducing pipe, ripple expansion joint subassembly, elbow pipe and resistant material inside lining, resistant material inside lining set up by reducing pipe ripple expansion joint subassembly and in the supply-air duct that the elbow pipe links to each other in proper order and forms, the both ends of supply-air duct are used for respectively with the air supply surround pipe with install the shaft jetting device intercommunication on the blast furnace, the last monitoring that is installed of supply-air duct the detection mechanism of flow and pressure in the supply-air duct. The utility model has the advantages that: the expansion deformation that can adapt to by normal atmospheric temperature to high temperature production to send into blast furnace with reducing gas from the shaft of blast furnace position in, and monitor the flow, the pressure isoparametric of being carried the medium, can transport reliably steadily with the assurance by the carried medium, raise the efficiency, reduce the blast furnace and smelt carbon and discharge.

Description

Blast furnace shaft air supply device and blast furnace shaft blowing air supply equipment

Technical Field

The utility model belongs to the technical field of blast furnace low carbon is smelted, especially relate to a blast furnace shaft air supply arrangement and blast furnace shaft jetting air supply equipment.

Background

The blast furnace iron-making process depends on coke and coal to provide heat and a reducing agent, and the carbon emission in steel production accounts for about 7-8% of the global carbon emission.

One of the main technical routes for reducing carbon in blast furnace iron making is furnace top gas circulation, i.e. unused CO in blast furnace gas is heated and then injected back into the blast furnace, and especially when hot CO is injected into the furnace body part of the blast furnace, the CO concentration in the furnace can be obviously improved, and the indirect reduction potential is improved. The bulk density of the materials at the shaft part of the blast furnace is large, the porosity of the material column is low, and high-temperature CO gas needs to be fed into the furnace with certain blowing kinetic energy, so that the high-temperature CO gas is conveniently and fully combined with the materials in the furnace.

The tuyere of the existing blast furnace is arranged at the position of a furnace hearth, high-temperature and high-pressure oxygen-enriched air is fed into the blast furnace, and equipment for conveying and blowing high-temperature, high-pressure and reducing gas to a blast furnace body is lacked in the market. The equipment for transporting the reducing gas has extremely high reliability requirements, and not only needs to avoid environmental disasters caused by accidental leakage, but also needs to resist the influence of the reducing gas on oxides in refractory materials and the influence of carbon precipitation reaction. Therefore, there is a need for a blast furnace shaft blower apparatus for stably and reliably feeding a high-temperature, high-pressure, reducing gas medium into a blast furnace shaft, with the goal of improving efficiency and reducing carbon emissions.

SUMMERY OF THE UTILITY MODEL

In view of the above shortcomings of the prior art, the utility model provides a blast furnace shaft air supply device and blast furnace shaft blowing air supply equipment to reach the purpose of reducing blast furnace ironmaking carbon emission.

For realizing above-mentioned purpose and other relevant purposes, the utility model provides a blast furnace shaft air supply arrangement, including reducing pipe, ripple expansion joint subassembly, elbow pipe and resistant material inside lining, resistant material inside lining set up by reducing pipe ripple expansion joint subassembly and in the supply-air duct that the elbow pipe links to each other in proper order and forms, supply-air duct's both ends are used for respectively with the air supply surrounding pipe with install the shaft jetting device intercommunication on the blast furnace, the last monitoring of installing of supply-air duct the detection mechanism of flow and pressure in the supply-air duct.

Optionally, the detection mechanism is including detecting the pipeline, first pressure pipe and second pressure pipe of getting, be equipped with fire-resistant inner liner in the detection pipeline, fire-resistant inner liner covers the inside wall of detection pipeline forms the detection passageway, first pressure pipe and second pressure pipe of getting are installed detect on the pipeline to along the air supply direction distribution of detection pipeline, and respectively with the front end and the rear end intercommunication of the sectional area change section of detection passageway.

Optionally, the detection channel includes a first straight section, a first tapered section, and a second tapered section that are distributed along the air supply direction, a large diameter end and a small diameter end of the first tapered section are respectively connected to small diameter ends of the first straight section and the second tapered section, and the first pressure tapping pipe and the second pressure tapping pipe are respectively installed on the first tapered section and the second tapered section.

Optionally, the part of the refractory lining located in the corrugated expansion joint assembly is arranged intermittently, and is used for absorbing the expansion amount of the refractory lining generated by heating.

Optionally, the bellows expansion joint assembly comprises at least one set of bellows expansion joints; the corrugated expansion joint is a single corrugated expansion joint or a compound corrugated expansion joint.

Optionally, a high temperature resistant stop valve is installed at one end of the air supply pipeline, which is used for being connected with the furnace body blowing device, and the high temperature resistant stop valve is used for controlling the on-off of the air supply pipeline.

Optionally, the high temperature resistant stop valve includes valve body, valve plate and installs the valve rod on the valve body, be equipped with in the valve body with the medium passageway of supply air duct intercommunication, the inner wall of medium passageway covers there is resistant material inside lining, the valve rod with the valve plate is connected, and can drive the valve plate motion is with the break-make of control medium passageway, the cladding has the resistant material layer of valve plate on the valve plate.

In order to realize above-mentioned purpose and other relevant mesh, this application still provides a blast furnace shaft jetting air supply equipment, including shaft jetting device with last blast furnace shaft air supply arrangement, high temperature resistant stop valve is located the supply-air duct with between the shaft jetting device, just the entrance point and the exit end of high temperature resistant stop valve respectively with the supply-air duct with shaft jetting device connects.

Optionally, the furnace body blowing device is used for being connected with a blast furnace, and a blowing end of the furnace body blowing device penetrates through a furnace body of the blast furnace and extends into the blast furnace.

Optionally, the furnace body blowing device comprises a furnace body blowing piece, and an installation sleeve for rigid connection with a furnace shell of the blast furnace is sleeved on the outer side of the furnace body blowing piece.

As described above, the blast furnace body air supply blowing device and the blast furnace body air supply equipment of the present invention can adapt to the expansion deformation from normal temperature to high temperature by the cooperation of the components such as the reducing pipe, the corrugated expansion joint with the expansion function, the elbow pipe, the refractory lining, etc., can endure the high temperature, high pressure and high reducing environment, and can convey the high temperature, high pressure and reducing gas from the air supply surrounding pipe to the designated position so as to convey the reducing gas from the body part of the blast furnace into the blast furnace; based on this, through parameters such as the flow of detection mechanism monitoring transported medium, pressure to guarantee that transported medium can be transported reliably and steadily, raise the efficiency, reduce carbon and discharge.

Drawings

FIG. 1 is a working schematic diagram of a blast furnace body air supply device of the utility model;

FIG. 2 is a working schematic diagram of a second implementation of the blast furnace body air supply device of the utility model;

FIG. 3 is a third operation diagram of the blast furnace body air supply device of the present invention;

FIG. 4 is an enlarged schematic view of portion A of FIG. 3;

FIG. 5 is an enlarged schematic view of detail B of FIG. 3;

fig. 6 is a schematic structural view of the furnace body blowing device in fig. 3.

Description of reference numerals

100-a shaft blowing device; 101-a blowing piece body; 1011-gas flow channel; 1012-cooling channels; 1013-a hard alloy layer; 1014-cooling medium inlet; 1015-fourth connecting part; 1016-media mixing interface; 102-a sheath; 1021-a first connection; 103-mounting the sleeve; 1031-second connection portion; 1032-fill hole; 104-an adjusting sleeve; 1041-a third connecting portion; 105-a gap region; 200-blast furnace; 201-an inner material resistant layer in the furnace; 202-furnace wall cooling wall; 203-furnace shell; 204-furnace wall cooling wall water pipe; 205-blast furnace center line; 300-air supply surrounding pipes; 400-blast furnace shaft air supply device; 401-a reducer pipe; 402-bellows expansion joint; 403-elbow pipe; 404-air supply duct; 500-high temperature resistant stop valve; 501-a valve body; 5011-media channel; 502-a valve stem; 503-a valve plate; 504-valve plate resistant material layer; 600-a detection mechanism; 601-detecting a pipeline; 6041-first straight tube section; 6042-first conical section; 6043-second conical section; 602-a first pressure tapping pipe; 603-a second pressure tapping pipe; 604-a refractory lining layer; 700-a pull rod mechanism; 800-refractory lining.

Detailed Description

The following description is given for illustrative embodiments of the present invention, and other advantages and effects of the present invention will be apparent to those skilled in the art from the disclosure of the present invention.

It should be understood that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any structure modification, ratio relationship change or size adjustment should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the function that the present invention can produce and the purpose that the present invention can achieve. In addition, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are used for clarity of description only, and are not used to limit the scope of the present invention, and the relative relationship between the terms may be changed or adjusted without substantial technical changes.

Referring to fig. 1 to 3, in some embodiments, the present application provides a blast furnace shaft air supply device, including a reducer pipe 401, a corrugated expansion joint assembly, an elbow pipe 403, and a refractory lining 800, where the refractory lining 800 is disposed in an air supply duct 404 formed by sequentially connecting the reducer pipe 401, the corrugated expansion joint assembly, and the elbow pipe 403, two ends of the air supply duct 404 are respectively used for communicating with an air supply surrounding pipe 300 and a shaft blowing device 100 installed on a blast furnace 200, and a detection mechanism 600 for monitoring flow and pressure in the air supply duct 404 is installed on the air supply duct 404.

Optionally, the large-diameter end of the reducer pipe 401 is fixedly connected with the air supply bustle pipe 300, the elbow pipe 403 is fixedly connected with the furnace body blowing device 100, the corrugated expansion joint assembly is located between the reducer pipe 401 and the elbow pipe 403, and two ends of the corrugated expansion joint assembly are fixedly connected with the reducer pipe 401 and the elbow pipe 403 respectively, so that the structural stability and reliability of the air supply device of the furnace body of the blast furnace can be guaranteed, and the expansion displacement difference between the air supply bustle pipe 300 and the blast furnace 200 can be compensated through the deformation of the corrugated expansion joint assembly.

Alternatively, the reducer pipe 401 may be installed along the radial direction of the channel in the air supply enclosure pipe 300, that is, the axis of the reducer pipe 401 is perpendicular to and intersects with the axis of the air supply enclosure pipe 300.

Optionally, an included angle formed by two ends of the elbow pipe 401 may be a right angle or an obtuse angle, that is, the elbow pipe may be a right angle elbow pipe or an obtuse angle elbow pipe, and a bent portion of the elbow pipe is in smooth transition.

Alternatively, the refractory lining may be made of a refractory material.

Optionally, flanges for interconnection are arranged on the reducer pipe, the corrugated expansion joint and the elbow pipe, and the bolts penetrate through the flanges to realize quick assembly and disassembly of the components, so that the operation is simple and convenient.

In the blast furnace body air supply device in the embodiment, the variable-diameter pipe, the corrugated expansion joint assembly, the elbow pipe, the refractory lining and other parts are mutually matched, so that one side of the corrugated expansion joint assembly connected with the variable-diameter pipe is a fixed point, and the other side of the corrugated expansion joint assembly connected with the variable-diameter pipe is a movable point; when the blast furnace warp along its height or direction of radius, the obtuse angle elbow pipe is at first decomposed into horizontal dimension and vertical volume with the deflection, angular displacement and axial displacement take place for ripple expansion joint subassembly, with the digestion, absorb the deformation displacement difference of both sides, make blast furnace shaft air supply arrangement can be at high temperature, normal operation under the high pressure, and implement the flow and the pressure of the medium in the monitoring supply air duct through detection mechanism, adjust medium delivery volume in real time according to detecting the parameter and can last reliably in order to ensure that the supply air duct can the operation of continuing, stable, thereby raise the efficiency, reduce carbon and discharge.

Referring to fig. 1 to 4, in some embodiments, the detection mechanism 600 includes a detection pipeline 601, a first pressure sampling pipe 602 and a second pressure sampling pipe 603, a refractory lining layer 604 is disposed in the detection pipeline 601, the refractory lining layer 604 covers an inner side wall of the detection pipeline 601 and forms a detection channel, and the first pressure sampling pipe 602 and the second pressure sampling pipe 603 are mounted on the detection pipeline 601, distributed along an air supply direction of the detection pipeline 601, and respectively communicated with a front end and a rear end of a section area change section of the detection channel.

Alternatively, the refractory lining layer 604 may be made of a refractory material.

Optionally, the detection channel includes a first straight section 6041, a first tapered section 6042, and a second tapered section 6043 that are distributed along the air supply direction, a large diameter end and a small diameter end of the first tapered section 6042 are respectively connected to small diameter ends of the first straight section 6041 and the second tapered section 6043, and the first pressure tapping pipe 602 and the second pressure tapping pipe 603 are respectively installed on the first tapered section 6042 and the second tapered section 6043.

The pressure in the detection channel can be directly detected through the first pressure sampling pipe and the second pressure sampling pipe, and the volume flow Q in the detection channel _V Calculated by the following formula, Q _V Has the unit of m ³ /h，

C in the formula represents an outflow coefficient, which is a known constant; ε represents the expandability coefficient, a known constant; a represents the cross-sectional area of the junction of the first tapered section and the second tapered section, and is a known value and has a unit of m ² (ii) a The delta P represents the pressure difference output by the detection mechanism, namely the difference value between the pressure value detected by the first pressure sampling pipe and the pressure value detected by the second pressure sampling pipe, and the unit is Pa; beta is expressed as the ratio of the diameter of the first conical section to the diameter of the second conical section, and the ratio is a known value, wherein the diameter of the first conical section is the diameter of the section which is coincident with the axial line of the first pressure sampling pipe, and the diameter of the second conical section is the diameter of the section which is coincident with the axial line of the second pressure sampling pipe; ρ is a unit of a gradient ₁ The density of the medium in the detection channel is expressed as a known value in kg/m ³ 。

In the embodiment, the fireproof lining layer is arranged in the detection pipeline, so that the detection mechanism can adapt to a high-temperature operation environment, and the detection mechanism can normally operate for a long time; and the inner diameters of all sections of the detection channel are different through the refractory lining layer, so that the detected pressure value is more accurate and reliable.

Referring to fig. 1-3, in some embodiments, the bellows expansion joint assembly includes at least one set of bellows expansion joints 402. Wherein, the bellows expansion joint 402 may be a single bellows expansion joint or a multiple bellows expansion joint.

Optionally, when the number of the corrugated expansion joints is one set, the corrugated expansion joint is a compound corrugated expansion joint; when the number of the corrugated expansion joints is two, at least one of the two corrugated expansion joints is a single corrugated expansion joint.

Alternatively, when the number of the bellows expansion joints 402 is two or more, the detection mechanism may be installed between the two sets of the bellows expansion joints. The two sets of corrugated expansion joints can be directly connected through the detection mechanism, or the two adjacent sets of corrugated expansion joints can be connected through the detection mechanism and the elbow pipe, and whether the elbow pipe is arranged between the two adjacent sets of corrugated expansion joints can be set according to requirements. The quantity and the combination mode of the corrugated expansion joints can be set according to the requirements of angular displacement and axial displacement generated by the use environment.

Referring to fig. 1-3, in some embodiments, the portions of the refractory lining within the bellows expansion joint assembly are intermittently positioned, i.e., the refractory lining within the bellows expansion joint is discontinuous to accommodate deformation of the bellows expansion joint.

Referring to fig. 3 and 5, in an embodiment, a high temperature resistant stop valve 500 is installed at one end of the blast pipe 300 for connecting with the shaft blowing device 100, and the high temperature resistant stop valve 500 is used for controlling the on/off of the blast pipe 404.

Optionally, the high temperature resistant stop valve 500 includes a valve body 501, a valve plate 503 and a valve rod 502 mounted on the valve body 501, a medium passage 5011 communicated with the air supply duct 404 is arranged in the valve body 501, the inner wall of the medium passage 5011 is covered with a refractory lining 800, the valve rod 502 is connected with the valve plate 503 and can drive the valve plate 503 to move so as to control the connection and disconnection of the medium passage, and the valve plate 503 is covered with a valve plate refractory layer 504. Wherein, the valve rod 502 is movably mounted on the valve body 501, and the valve rod 502 can move telescopically to drive the valve plate 503 to move; a slot position matched with the valve plate 503 is arranged in the medium channel 5011, and when the valve rod drives the valve plate to fall into the slot position to block the medium channel, the valve plate is pushed by the pressure difference between the air supply surrounding pipe and the blast furnace to compress the slot position and form a sealing surface with the slot position, so that the air supply pipeline is closed to stop supplying air.

In one embodiment, the air supply pipeline is provided with horizontal pipe sections distributed along the horizontal direction, and the high-temperature-resistant stop valve is vertically arranged on the horizontal pipe sections and is perpendicular to the air supply direction. So that the valve plate is stressed by pressure difference perpendicular to the valve plate, and the valve plate and the groove position are kept sealed to form a stable blocking state.

Optionally, the horizontal pipe section may be arranged on an elbow pipe connected to the furnace body blowing device, one end of the elbow pipe close to the furnace body blowing device extends to form a horizontal pipe section, and the high-temperature-resistant stop valve may be directly mounted at an end of the horizontal pipe section, that is, the high-temperature-resistant regulating valve directly connects the elbow pipe to the furnace body blowing device, so that the structure is simple, and the disassembly, assembly and connection are convenient; or the horizontal pipe section is positioned on the pipe section connected with the two sets of corrugated expansion joints.

Referring to fig. 1 to 3 and fig. 6, in an embodiment, the present application further provides a blast furnace stack blowing air supply apparatus, including a stack blowing device 100 and a blast furnace stack blowing device 400 in any of the above embodiments, a high temperature resistant stop valve 500 is located between the blowing duct 404 and the stack blowing device 100, and an inlet end and an outlet end of the high temperature resistant stop valve 500 are respectively connected to the blowing duct 404 and the stack blowing device 100.

Optionally, the shaft injection device 100 is adapted to be connected to the blast furnace 200, and the injection end of the shaft injection device 100 extends into the blast furnace through the shaft of the blast furnace.

Optionally, the furnace body of the blast furnace includes a furnace refractory layer 201, a furnace wall cooling wall 202 and a furnace shell 203 which are sequentially distributed from inside to outside, that is, distances from the furnace refractory layer 201, the furnace wall cooling wall 202 and the furnace shell 203 to a blast furnace centerline 205 are sequentially increased. The furnace wall cooling wall 202 is provided with a cooling wall water pipe 204, and one end of the cooling wall water pipe 204 extends out of the furnace shell 203.

Optionally, the furnace body blowing device 100 includes a furnace body blowing member, and an installation sleeve 103 for rigidly connecting with a furnace shell 203 of the blast furnace 200 is sleeved on an outer side of the furnace body blowing member. The mounting sleeve 103 penetrates through the furnace shell 203, extends into the furnace wall cooling wall 202, is welded and fixed with the furnace shell 203 in a welding mode, and the front end of the furnace body blowing piece extends into the mounting sleeve 103 and is fixedly connected with the mounting sleeve 103 through a bolt. Before the mounting sleeve 103 is fixed with the furnace shell 203, the blast furnace body air supply device can be supported by the pull rod mechanism 700 in an auxiliary way, and after the mounting sleeve 103 is mounted, the pull rod mechanism 700 can be detached.

Referring to fig. 1 to 3 and fig. 6, in an embodiment, the stack injection piece includes an injection piece body 101, a cooling channel 1012 and an air flow channel 1011 are disposed in the injection piece body 101 and axially penetrate the injection piece body 101, the cooling channel 1012 is distributed outside the air flow channel 1011, and a cooling medium inlet 1014 and a cooling medium outlet are disposed on the cooling channel 1012. The cooling medium enters the cooling channel from the cooling medium inlet 1014 at the rear end of the blowing piece main body 101, is conveyed to the front end of the blowing piece main body, then returns to the rear end of the blowing piece main body, and is discharged from the cooling medium outlet at the rear end of the blowing piece main body 101.

Optionally, the furnace body blowing piece further includes a sheath 102, the sheath 102 is disposed on the outer sidewall of the rear end of the blowing piece body 101, and the inner sidewall of the sheath 102 is tightly attached to the outer sidewall of the rear end of the blowing piece body 101. The outer wall of the blowing piece main body 101 is wrapped by the sheath 102, which is beneficial to improving the structural strength of the blowing piece main body 101.

Optionally, the overall outer contour of the furnace body blowing piece can be in a round rod shape or a round table shape.

Optionally, the sheath 102 may be a cylindrical structure, and the sheath 102 is sleeved on the blowing element main body 101 and is sealed and fixed with the blowing element main body 101 into a whole by welding, bonding or other fixing methods.

Alternatively, the sheath 102 may be integrally formed with the blowing piece body 101.

Optionally, the blast furnace body blowing equipment further comprises an installation sleeve 103 for externally connecting the blast furnace 200, the installation sleeve 103 is sleeved on the sheath 102 and connected with the sheath 102, so that the furnace body blowing piece can be directly installed on the blast furnace 200 through the installation sleeve 103, the installation structure is simplified, the installation operation is simple, and the strength of the installation structure is guaranteed.

Alternatively, the mounting sleeve 103 may be a cylindrical structure.

Optionally, the mounting sleeve 103 may be made of a hard high-temperature-resistant material, the sheath 102 may also be made of a hard high-temperature-resistant material, and the blowing piece main body 101 is assembled and connected with the mounting sleeve 103 through the sheath 102, so that the contact area is increased, and the structural connection is stable and reliable. Wherein, the mounting sleeve 103 is fixedly connected with the blast furnace 200 in a welding mode.

Optionally, the sheath 102 is provided with a first connection portion 1021, and the mounting sleeve 103 is provided with a second connection portion 1031 detachably connected to the first connection portion 1021.

Optionally, first connecting portion 1021 and second connecting portion 1031 can be the flange, through bolted connection between first connecting portion 1021 and the second connecting portion 1031, simple structure, the manufacturing degree of difficulty is low, dismouting easy operation is convenient, the cost is reduced.

Referring to fig. 1 to 3 and 6, in an embodiment, the furnace blowing device 100 further includes an adjustment sleeve 104 covering the furnace blowing element, the adjustment sleeve 104 is located between the first connecting portion 1021 and the second connecting portion 1031, and both ends of the adjustment sleeve 104 are detachably connected to the first connecting portion 1021 and the second connecting portion 1031, respectively. The depth of the furnace body injection piece extending into the blast furnace 200 can be quickly and conveniently adjusted by arranging the adjusting sleeve 104, the adjusting operation difficulty is low, the adjustment is flexible and convenient, the requirements of different working conditions can be met, and the application range is wider.

Optionally, the adjusting sleeve 104 may have a cylindrical structure, the two ends of the adjusting sleeve 104 are both provided with third connecting portions 1041, and the third connecting portions 1041 at the two ends are detachably connected to the first connecting portion 1021 and the second connecting portion 1031, respectively. Further, the third connecting portion 1041 may be a flange, and the third connecting portion 1031 is connected to the first connecting portion 1021 and the second connecting portion 1031 by bolts, so that the assembly, disassembly and replacement are quick and convenient. Wherein, the bolt can directly pass first connecting portion 1021, third connecting portion 1041 and second connecting portion 1031 and link to each other the direct fixed of stack jetting spare, adjusting collar 104 and installation cover 103, has guaranteed the precision of assembly promptly, has guaranteed the intensity of structure again.

Optionally, a gap region 105 between the adjusting sleeve 104, the mounting sleeve 103, and the sheath 102 is filled with a refractory material, and the mounting sleeve 103 is provided with a filling hole 1032 for filling the refractory material into the gap region 105. The gap area 105 is filled with the flowable refractory material from the filling hole 1032, and gaps among the furnace body blowing piece, the mounting sleeve 103 and the protective sleeve 102 are filled, so that the structure is more stable and reliable, the fire resistance of the equipment is improved, and the high-temperature working environment is favorably adapted. In addition, the refractory material can block the overflow of gas or substances in the blast furnace.

Optionally, the sheath 102, the mounting sleeve 103 and the adjusting sleeve 104 may be made of hard high temperature resistant material, and the blowing member body 101 may be made of heat conductive material. On the one hand, the high strength performance of the structure is guaranteed, and on the other hand, high-strength cooling capacity can be provided.

Optionally, the sheath 102, the mounting sleeve 103 and the adjusting sleeve 104 may be made of steel, and have high structural strength; the injection part body 101 can be made of copper or aluminum, and has good heat conduction performance, so that a cooling channel arranged in the injection part body 101 can quickly take away heat under the action of a cooling medium, the working temperature of equipment is reduced, and long-term stable operation of the equipment is facilitated.

Optionally, a hard alloy layer 1013 is arranged on the outer wall of the front end of the blowing piece main body 101, the jacket 102 and the hard alloy layer 1013 are matched to cover the outer wall of the furnace body blowing piece, and the jacket 102 and the hard alloy layer 1013 are matched to protect the blowing piece main body 101, so that not only is the structural strength of the furnace body blowing piece ensured, but also the service life of the furnace body blowing piece is ensured. The hard alloy layer 1013 may be applied by a build-up welding method, an electroplating method, or other methods to fill the front end side wall and the front end wall of the blowing part body 101, thereby improving the wear resistance and high temperature resistance of the blowing part body 101.

Referring to fig. 1 to 3 and fig. 6, in an embodiment, a medium mixing port 1016 is provided on the furnace body blowing piece, the medium mixing port 1016 is obliquely provided on a rear end side wall of the furnace body blowing piece and is communicated with the air flow channel 1011, and a required medium can be introduced into the air flow channel 1011 through the medium mixing port 1016 according to different working condition requirements. For example, the media mixing interface 1016 may be used to mix and blow a cryogenic reducing gas or other fuel into the gas flow channel 1011, the fuel may be a solid fuel, a gaseous fuel, or a liquid fuel; or the medium mixing interface 1016 can be used for injecting inert gases such as nitrogen or argon, and the blockage of the furnace body blowing opening can be effectively prevented. The medium mixing interface 1016 is obliquely arranged, so that an included angle formed by the medium mixing interface 1016 and the front end of the blowing piece main body 101 is an obtuse angle, and the medium mixing interface 1016 and the blowing piece main body 101 form a fixed angle, so that the medium can be mixed conveniently.

Referring to fig. 1 to 6, in some embodiments, the blast furnace shaft air supply device 400 is connected to the air supply shroud 300 and the blast furnace 200 through the shaft injection device 100, and the reducing gas medium to be injected into the blast furnace 200 in the air supply shroud 300 is sent to the shaft injection device 100 beside the blast furnace 200 through the blast furnace shaft air supply device and then injected into the blast furnace 200 through the shaft injection member. The number of the blast furnace body air supply devices 400 and the number of the furnace body blowing devices 100 can be set according to requirements, and the blast furnace body air supply devices 400 and the furnace body blowing devices 100 are arranged in a one-to-one correspondence manner; for example, when the number of the blast furnace body air supply devices and the number of the furnace body blowing devices are more than or equal to 2, the blast furnace body air supply devices and the furnace body blowing devices are uniformly arranged along the circumference of the blast furnace body, corresponding blast furnace body blowing air supply equipment can be controlled to operate or stop operating according to requirements, and the control is simple and convenient, so that the production requirements are met, the efficiency is improved, and the energy conservation and emission reduction are facilitated.

In the description of the present specification, reference to the description of the terms "present embodiment," "example," "specific example," 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 invention. In this specification, the schematic representations of the terms used above do not necessarily refer 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.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention shall be covered by the claims of the present invention.

Claims (10)

1. The utility model provides a blast furnace shaft air supply arrangement which characterized in that: including reducing pipe, ripple expansion joint subassembly, elbow pipe and resistant material inside lining, resistant material inside lining set up by the reducing pipe in the ripple expansion joint subassembly and the elbow pipe links to each other in proper order in the supply-air duct that forms, supply-air duct's both ends are used for respectively with air supply enclosing pipe and install the shaft jetting device intercommunication on the blast furnace, the last detection mechanism who is used for monitoring of installing of supply-air duct the flow in the supply-air duct and pressure.

2. The blast furnace shaft air supply device according to claim 1, characterized in that: detection mechanism is including detecting the pipeline, first pressure pipe and the second pressure pipe of getting, be equipped with the fire-resistant inner liner in the detection pipeline, the fire-resistant inner liner covers the inside wall of detection pipeline forms the detection passageway, first pressure pipe and the second pressure pipe of getting is installed detection pipeline is last to air supply direction along the detection pipeline distributes, and communicates with the front end and the rear end of the sectional area change section of detection passageway respectively.

3. The blast furnace shaft air supply device according to claim 2, characterized in that: the detection channel comprises a first straight pipe section, a first conical section and a second conical section which are distributed along the air supply direction, the large-diameter end and the small-diameter end of the first conical section are respectively connected with the small-diameter ends of the first straight pipe section and the second conical section, and the first pressure tapping pipe and the second pressure tapping pipe are respectively installed on the first conical section and the second conical section.

4. The blast furnace shaft air supply device according to claim 1, characterized in that: the parts of the refractory lining positioned in the corrugated expansion joint assembly are arranged in an interrupted mode.

5. The blast furnace shaft air supply device according to claim 1, characterized in that: the corrugated expansion joint assembly comprises at least one set of corrugated expansion joints; the corrugated expansion joint is a single corrugated expansion joint or a compound corrugated expansion joint.

6. The blast furnace shaft air supply device according to any one of claims 1 to 5, characterized in that: and a high-temperature-resistant stop valve is installed at one end of the air supply pipeline, which is used for being connected with the furnace body blowing device, and the high-temperature-resistant stop valve is used for controlling the on-off of the air supply pipeline.

7. The blast furnace shaft air supply device according to claim 6, characterized in that: the high temperature resistant stop valve includes valve body, valve plate and installs the valve rod on the valve body, be equipped with in the valve body with the medium passageway of supply-air duct intercommunication, the inner wall of medium passageway covers there is resistant material inside lining, the valve rod with the valve plate is connected to can drive the valve plate motion is with the break-make of control medium passageway, the cladding has the resistant material layer of valve plate on the valve plate.

8. The utility model provides a blast furnace shaft jetting air supply equipment which characterized in that: the blast furnace body blowing device comprises a furnace body blowing device and the blast furnace body blowing device as claimed in claim 6, wherein the high-temperature-resistant stop valve is positioned between the air supply pipeline and the furnace body blowing device, and the inlet end and the outlet end of the high-temperature-resistant stop valve are respectively connected with the air supply pipeline and the furnace body blowing device.

9. The blast furnace shaft blowing air supply device according to claim 8, characterized in that: the furnace body blowing device is used for being connected with a blast furnace, and the blowing end of the furnace body blowing device penetrates through the furnace body of the blast furnace and extends into the blast furnace.

10. The blast furnace shaft blowing air supply equipment of claim 9, characterized in that: the furnace body blowing device comprises a furnace body blowing piece, and an installation sleeve for rigid connection with a furnace shell of the blast furnace is sleeved on the outer side of the furnace body blowing piece.

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