CN219951094U

CN219951094U - Spiral discharging device at bottom of pure hydrogen shaft furnace reduction furnace and pure hydrogen shaft furnace

Info

Publication number: CN219951094U
Application number: CN202321363610.9U
Authority: CN
Inventors: 周和敏; 郝晓东; 沈朋飞; 张俊; 徐洪军; 杨光浩; 何鹏; 高亮; 高俊哲
Original assignee: CISRI Sunward Technology Co Ltd
Current assignee: CISRI Sunward Technology Co Ltd
Priority date: 2023-05-31
Filing date: 2023-05-31
Publication date: 2023-11-03
Anticipated expiration: 2033-05-31

Abstract

The utility model relates to a spiral discharging device at the bottom of a pure hydrogen shaft furnace reduction furnace and the pure hydrogen shaft furnace, belongs to the technical field of pure hydrogen shaft furnace reduction, and solves the problem that the existing discharging device is easy to transfer heat of high-temperature metallized pellets to the driving end of the discharging device. The spiral discharging device at the bottom of the pure hydrogen shaft furnace reduction furnace comprises a discharging roller, a driving device and spiral blades extending along the periphery of the discharging roller in a spiral way, wherein the driving device is arranged at one end of the discharging roller, the spiral blades are arranged at the other end of the discharging roller, one end of the discharging roller provided with the spiral blades is positioned in the shaft furnace, and the discharging roller is connected with the shaft furnace in a cantilever way; one end of the helical blade, which is close to the driving device, is provided with a supporting baffle ring, the supporting baffle ring is sleeved on the discharging roller and is welded with the periphery of the discharging roller, and the inside of the supporting baffle ring is provided with heat-insulating refractory materials. The spiral discharging device at the bottom of the pure hydrogen shaft furnace can reduce high-temperature heat conduction to the driving end of the discharging device.

Description

Spiral discharging device at bottom of pure hydrogen shaft furnace reduction furnace and pure hydrogen shaft furnace

Technical Field

The utility model relates to the technical field of pure hydrogen shaft furnace reduction, in particular to a spiral discharging device at the bottom of a pure hydrogen shaft furnace reduction furnace and the pure hydrogen shaft furnace.

Background

Development of hydrogen metallurgy technology is emission reduction of CO in the iron and steel industry ₂ The necessary trend of process selection, while a pure hydrogen shaft furnace is CO for realizing the steel industry ₂ Key technologies of ultra-low emission and near zero emission.

In a pure hydrogen shaft furnace, oxidized pellets entering the shaft furnace from a preheating zone become sponge iron when the oxidized pellets are discharged from a reduction zone, the melting point of iron is high, and the iron cannot be fused, but chemical reactions between unreduced gangue and ferrous oxide can generate low-melting-point compounds to become sintered matters to influence discharging, so that the discharging problem of high-temperature metallized pellets is a key technology for influencing the direct reduction process of the pure hydrogen shaft furnace, and a discharging device is usually arranged at a discharging port to promote discharging and is driven by a driving device to promote discharging.

Because the temperature of the metallized pellets in the pure hydrogen shaft furnace is about 1000 ℃, and the existing discharging device has no heat insulation structure, the high-temperature metallized pellets can easily transfer heat to the driving end of the discharging device, and the driving function of the driving end is damaged.

Disclosure of Invention

In view of the above analysis, the present utility model aims to provide a spiral discharging device at the bottom of a reducing furnace of a pure hydrogen shaft furnace and the pure hydrogen shaft furnace, so as to solve the problem that the existing discharging device is easy to transfer the heat of materials to the driving end of the discharging device.

The aim of the utility model is mainly realized by the following technical scheme:

in one aspect, the utility model provides a spiral discharging device at the bottom of a reducing furnace of a pure hydrogen vertical furnace, which comprises a discharging roller, a driving device and spiral blades extending along the periphery of the discharging roller in a spiral way, wherein the driving device is arranged at one end of the discharging roller, the spiral blades are arranged at the other end of the discharging roller, one end of the discharging roller, provided with the spiral blades, is positioned in the vertical furnace, and the discharging roller is connected with the vertical furnace in a cantilever way;

the one end that helical blade is close to drive arrangement is provided with the support baffle ring, the support baffle ring cover is established on the row material roller, and with the periphery welding of row material roller, the inside of support baffle ring is provided with thermal-insulated refractory material.

Preferably, the spiral blade comprises a positive spiral blade and a negative spiral blade which are sequentially arranged from a first shaft head of the discharging roller in the shaft furnace to the inner wall of the shaft furnace, the spiral directions of the positive spiral blade and the negative spiral blade are opposite, and the supporting baffle ring is arranged at one end, close to the inner wall of the shaft furnace, of the negative spiral blade.

Preferably, the discharging roller comprises an outer cylinder, an inner cylinder and an axle center pipe which are sequentially sleeved from outside to inside, the ends of the outer cylinder, the inner cylinder and the axle center pipe which are positioned in the shaft furnace are all welded with the first axle head, the pipe inner cavity of the axle center pipe is communicated with the cavity between the outer cylinder and the inner cylinder through an axle head water through hole on the first axle head, and the cavity between the outer cylinder and the inner cylinder is communicated with the cavity between the inner cylinder and the axle center pipe through an inner cylinder water through hole on the inner cylinder.

Preferably, a packing gland and a packing gland are arranged on one side, far away from the helical blades, of the supporting baffle ring, and graphite fiber woven packing is filled in a cavity formed among the packing gland, the packing gland and the discharging roller.

Preferably, the spiral discharging device at the bottom of the pure hydrogen shaft furnace reduction furnace further comprises an outer sleeve, the outer sleeve is sleeved at the position, close to the outer wall of the shaft furnace, of the discharging roller, one end, close to the outer wall of the shaft furnace, of the outer sleeve is welded with the outer wall of the shaft furnace, and one end, far from the outer wall of the shaft furnace, of the outer sleeve is connected with the packing sealing sleeve through a first middle flange.

Preferably, in the pure hydrogen shaft furnace, a shaft furnace annular inner masonry wall is arranged around the discharging roller along the extending direction of the helical blade, and fiber cotton is arranged in a cavity formed among the supporting baffle ring, the shaft furnace annular inner masonry wall, the first middle flange, the packing sealing sleeve and the discharging roller.

Preferably, a first bearing support system is arranged on one side of the packing gland far away from the shaft furnace, the first bearing support system comprises a first bearing seat, one side of the first bearing seat close to the packing gland is connected with the first intermediate flange through a second intermediate flange, the first bearing seat and one side of the first bearing seat far away from the packing gland are provided with first bearing seat glands, and a self-aligning spherical roller bearing is arranged in a cavity formed among the first bearing seat, the first bearing seat glands and the discharging roller;

one side of the first bearing seat gland, which is far away from the first bearing seat, is provided with a first bearing seal seat and a first bearing seal seat gland, and a first vehicle-mounted rotary seal structure is arranged in a cavity formed among the first bearing seal seat, the first bearing seal seat gland and the discharging roller.

Preferably, a second bearing support system is arranged on the side of the first bearing support system, which is far away from the shaft furnace, the second bearing support system comprises a second bearing seat gland arranged on the side of the second bearing support system, which is far away from the shaft furnace, and tapered roller bearings are arranged in cavities formed among the second bearing seat, the second bearing seat gland and the discharging rollers;

a third intermediate flange is arranged between the second bearing gland and the driving device and connected with the driving device, a third intermediate flange gland is arranged on one side, close to the driving device, of the third intermediate flange, and a second vehicle-type rotary sealing structure is arranged in a cavity formed among the third intermediate flange, the third intermediate flange gland and the discharging roller.

Preferably, the bottom spiral discharging device of the pure hydrogen shaft furnace further comprises a first bearing seat sleeve and a second bearing seat sleeve;

the first bearing sleeve is sleeved between the first bearing support system and the second bearing support system, one end of the first bearing sleeve, which is close to the first bearing support system, is connected with the second intermediate flange and the first intermediate flange, one end of the first bearing sleeve, which is far away from the first bearing support system, is connected with the second bearing seat, and a first airtight cavity is formed among the first bearing seat sleeve, the second intermediate flange, the first bearing seat, the second bearing seat and the discharging roller;

the second bearing seat sleeve is sleeved between the second bearing seat support system and the third intermediate flange, one end, close to the second bearing seat support system, of the second bearing seat sleeve is connected with the second bearing seat, one end, close to the third intermediate flange, of the second bearing seat sleeve is connected with the third intermediate flange, and a second airtight cavity is formed among the second bearing seat sleeve, the second bearing seat, the third intermediate flange and the discharging roller;

the first closed cavity and the second closed cavity are respectively connected with a nitrogen pipeline.

In a second aspect, the utility model also provides a pure hydrogen shaft furnace, which comprises the spiral discharging device at the bottom of the reducing furnace of the pure hydrogen shaft furnace.

Compared with the prior art, the utility model has at least one of the following beneficial effects:

1. according to the spiral discharging device for the bottom of the pure hydrogen shaft furnace, one end, close to the driving device, of the spiral blade is provided with the supporting baffle ring, the inside of the supporting baffle ring is provided with the heat-insulating refractory material, the heat-insulating refractory material can play a role in heat insulation, the supporting baffle ring can play a role in blocking materials of high-temperature metallized pellets, the approach of the high-temperature metallized pellets to the wall of the shaft furnace is avoided, and high-temperature heat conduction to the driving end of the discharging device is further reduced.

2. The spiral blades are arranged on the periphery of the discharge roller of the spiral discharge device at the bottom of the pure hydrogen shaft furnace, and comprise the positive spiral blades and the negative spiral blades, when the discharge roller rotates, the spiral blades can play a role in loosening materials, so that materials are prevented from accumulating, and meanwhile, the negative spiral blades close to the inner wall of the shaft furnace can prevent the materials from accumulating at the root of the shaft furnace, so that the high-temperature metallized pellets at the bottom of the shaft furnace are prevented from accumulating to form a dead material area.

3. The discharging roller of the spiral discharging device at the bottom of the pure hydrogen shaft furnace comprises a cooling system formed by an outer cylinder, an inner cylinder and an axle center pipe, and is used for cooling the outer cylinder and blades, so that the requirement of high-temperature work in the furnace is met, and meanwhile, the heat conduction from the high temperature to the driving end of the discharging device is further reduced.

4. The spiral discharging device at the bottom of the pure hydrogen shaft furnace is used for realizing multistage dynamic sealing and static sealing through the dustproof heat insulation system, the vehicle-type rotary dynamic sealing system, the packing dynamic sealing system, the metal backing ring static sealing system and the nitrogen static sealing system, improving the tightness between the spiral discharging device and the shaft furnace in the rotation process of the spiral discharging device and preventing hydrogen leakage.

In the utility model, the technical schemes can be mutually combined to realize more preferable combination schemes. Additional features and advantages of the utility model will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the utility model. The objectives and other advantages of the utility model may be realized and attained by the structure particularly pointed out in the written description and drawings.

Drawings

The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the utility model, like reference numerals being used to refer to like parts throughout the several views.

FIG. 1 is a front cross-sectional view of a screw discharger at the bottom of a pure hydrogen shaft furnace according to the present utility model;

FIG. 2 is a schematic view of the structure of the discharge roller of the present utility model;

FIG. 3 is an enlarged view of part A of FIG. 1;

FIG. 4 is an enlarged view of part B of FIG. 1;

FIG. 5 is a front cross-sectional view of the bottom portion of a pure hydrogen shaft furnace of the present utility model.

Reference numerals:

1-positive helical blades; 2-reverse helical blades; 3-supporting a baffle ring; 4-an outer cylinder; 5-an inner cylinder; 501-inner cylinder water holes; 502-a separator; 503-baffle water holes; 6-a shaft core tube; 7-a discharge roller; 8-a driving device; 9-a first shaft head; 901-a shaft head water through hole; 10-packing sealing sleeve; 11-packing gland; 12-graphite fiber woven filler; 13-an outer sleeve; 14-a first intermediate flange; 15-building a wall in a ring shape in the shaft furnace; 16-fiber cotton; 17-a first bearing seat; 18-a second intermediate flange; 19-aligning spherical roller bearings; 20-a first bearing seal seat; 21-a first bearing seal seat gland; 22-a first vehicle rotary seal structure; 23-a second bearing block; 24-a second bearing gland; 25-a third intermediate flange; 26-a third intermediate flange gland; 27-a second vehicle rotary seal structure; 28-a first bearing housing sleeve; 29-a second bearing sleeve; 30-nitrogen pipeline; 31-a first bearing seat gland; 32-a bi-directional rotary water joint flange; 33-a water inlet pipeline; 34-a water return line; 35-a bidirectional rotary water joint; 36-a first fixing member; 37-metal backing ring; 38-sealing rubber gaskets; 39-oil ring; 40-spacer bush; 41-O-shaped sealing rings; 42-a second fixing member; 43-a third mount; 44-fourth securing member; 45-fifth fixing piece; 46-bearing cooling water pipe; 47-oil injection pipeline; 48-tapered roller bearings; 49-a discharge port; 50-a first support base; 51-a second support seat.

Detailed Description

The following detailed description of preferred embodiments of the utility model is made in connection with the accompanying drawings, which form a part hereof, and together with the description of the embodiments of the utility model, are used to explain the principles of the utility model and are not intended to limit the scope of the utility model.

In one aspect, a specific embodiment of the utility model provides a bottom spiral discharging device of a pure hydrogen shaft furnace, as shown in fig. 1, the bottom spiral discharging device of the pure hydrogen shaft furnace comprises a discharging roller 7, a driving device 8 and a spiral blade extending along the periphery of the discharging roller 7 in a spiral way, the driving device 8 is arranged at one end of the discharging roller 7, the spiral blade is arranged at the other end of the discharging roller 7, one end of the discharging roller 7 provided with the spiral blade is positioned in the shaft furnace, and the discharging roller 7 and the shaft furnace are connected in a cantilever way;

the one end that helical blade is close to drive arrangement 8 is provided with supports the baffle ring 3, support the baffle ring 3 cover and establish on the row material roller 7, and with the periphery welding of row material roller 7, the inside of supporting the baffle ring 3 is provided with thermal-insulated refractory material.

When the device is implemented, the driving device 8 drives the discharging roller 7 to rotate, and the discharging roller 7 drives the spiral blade to rotate so as to promote discharging; the supporting baffle ring plays a role in heat insulation and material blocking on the high-temperature metallized pellets, so that the effect of high-temperature heat radiation to the driving end of the discharging device is reduced.

Compared with the prior art, the spiral discharging device of the bottom of the pure hydrogen shaft furnace reduction furnace, provided by the embodiment, is characterized in that one end of the spiral blade, which is close to the driving device, is provided with the supporting baffle ring, the inside of the supporting baffle ring is provided with the heat-insulating refractory material, the heat-insulating refractory material can play a role in heat insulation, the supporting baffle ring can play a role in blocking materials of high-temperature metallized pellets, the situation that the high-temperature metallized pellets are close to the wall of the shaft furnace is avoided, and the effect of high-temperature heat conduction to the driving end of the discharging device is further reduced.

Illustratively, the spiral blade is detachably connected with the discharging roller 7, so that the blade can be replaced conveniently.

Illustratively, the spiral blades comprise a positive spiral blade 1 and a negative spiral blade 2 which are sequentially arranged from a first shaft head 9 of the discharging roller 7 in the shaft furnace to the inner wall of the shaft furnace, the spiral directions of the positive spiral blade 1 and the negative spiral blade 2 are opposite, and the supporting baffle ring 3 is arranged at one end, close to the inner wall of the shaft furnace, of the negative spiral blade 2. When the discharging roller rotates, the spiral blade can play a role in loosening materials, so that the materials are prevented from accumulating, and meanwhile, the reverse spiral blade close to the inner wall of the shaft furnace can prevent the materials from accumulating at the root of the shaft furnace, so that the high-temperature metallized pellets at the bottom of the shaft furnace are prevented from accumulating to form a dead material area.

Illustratively, the junction of the positive helical blade 1 and the negative helical blade 2 is located above the shaft furnace discharge opening 49, helping to promote discharge of material from the discharge opening.

Illustratively, as shown in fig. 2, the discharging roller 7 comprises an outer cylinder 4, an inner cylinder 5 and an axle center pipe 6 which are sequentially sleeved from outside to inside, the ends of the outer cylinder 4, the inner cylinder 5 and the axle center pipe 6 which are positioned in the shaft furnace are all welded with a first shaft head 9, the pipe inner cavity of the axle center pipe 6 is communicated with a cavity between the outer cylinder 4 and the inner cylinder 5 through a shaft head water through hole 901 on the first shaft head 9, and the cavity between the outer cylinder 4 and the inner cylinder 5 is communicated with the cavity between the inner cylinder 5 and the axle center pipe 6 through an inner cylinder water through hole 501 on the inner cylinder 5, so that a cooling system is formed for cooling the outer cylinder and blades, thereby meeting the requirement of high-temperature work in the furnace and further reducing high-temperature heat conduction to the driving end of the discharging device.

Further, the spiral discharging device at the bottom of the pure hydrogen shaft furnace reduction furnace further comprises a water inlet pipeline 33 and a water return pipeline 34, one end, far away from the shaft furnace, of the discharging roller 7 is provided with a bidirectional rotary water joint 35, the bidirectional rotary water joint 35 is connected with the discharging roller 7 through a bidirectional rotary water joint flange 32, a water inlet cavity of the bidirectional rotary water joint 35 is communicated with the inner cavity of the shaft center pipe 6, and the water inlet pipeline 33 is communicated with the inner cavity of the shaft center pipe 6 through the bidirectional rotary water joint 35; the backwater cavity of the bidirectional rotary water joint 35 is communicated with the cavity between the inner cylinder 5 and the shaft center pipe 6, the backwater pipeline 34 is communicated with the backwater cavity of the bidirectional rotary water joint 3, and the backwater cavity of the bidirectional rotary water joint 3 is communicated with the cavity between the inner cylinder 5 and the shaft center pipe 6 through a partition water through hole 503 on a partition 502. The partition 502 is disposed at an end of the cavity between the inner barrel 5 and the center tube 6 remote from the first stub shaft 9.

During implementation, cooling water enters the inner cavity of the shaft core tube 6 through the water inlet pipeline 33, then enters the cavity between the outer cylinder 4 and the inner cylinder 5 through the shaft head water through hole 901, then enters the cavity between the inner cylinder 5 and the shaft core tube 6 through the inner cylinder water through hole 501, flows out through the partition plate water through hole 503 on the partition plate 502, and finally is discharged through the water return pipeline 34, so that the cooling of the outer cylinder and the blades is realized.

Only a packing seal is usually arranged between the discharging device and the shaft furnace in the prior art, the sealing performance of the structure is poor, and once hydrogen leaks, huge potential safety hazards can exist due to the high hydrogen content in the pure hydrogen shaft furnace.

Thus, as shown in fig. 3, in the spiral discharging device at the bottom of the pure hydrogen shaft furnace of the utility model, a packing gland 10 and a packing gland cover 11 are arranged on one side of the supporting baffle ring 3 far away from the spiral blade, and a graphite fiber woven packing 12 is filled in a cavity formed among the packing gland 10, the packing gland cover 11 and the discharging roller 7 to form a packing dynamic sealing system for preventing hydrogen leakage.

The packing gland 10 is illustratively bolted to the packing gland 11.

Illustratively, the spiral discharging device at the bottom of the pure hydrogen shaft furnace reduction furnace further comprises an outer pipe sleeve 13, the outer pipe sleeve 13 is sleeved at a position, close to the outer wall of the shaft furnace, of the discharging roller 7, one end, close to the outer wall of the shaft furnace, of the outer pipe sleeve 13 is welded with the outer wall of the shaft furnace, and one end, far from the outer wall of the shaft furnace, of the outer pipe sleeve 13 is connected with the packing sealing sleeve 10 through a first middle flange 14.

The end of the outer jacket 13 remote from the outer wall of the shaft furnace is welded with a first fixing element 36, the first fixing element 36 is connected with the end of the first intermediate flange 14 remote from the discharge roller 7 by bolts, and the end of the first intermediate flange 14 close to the discharge roller 7 is connected with the packing gland 10 by bolts.

Illustratively, the first mount 36 and the first intermediate flange 14 are provided with a metal backing ring 37; a metal backing ring 37 is arranged between the first intermediate flange 14 and the packing gland 10.

Illustratively, in the pure hydrogen shaft furnace, a shaft furnace annular inner masonry wall 15 is arranged around the discharge roller 7 along the extending direction of the helical blades, and fiber cotton 16 is arranged in a cavity formed between the supporting baffle ring 3, the shaft furnace annular inner masonry wall 15, the first middle flange 14, the packing gland 10 and the discharge roller 7. The cellucotton 16 can function to prevent dust discharge from the furnace as well as to further insulate the heat, i.e., form a dust-proof insulation system.

Illustratively, a first bearing support system is provided on the side of the packing gland 11 remote from the shaft furnace, said first bearing support system comprising a first bearing housing 17, said first bearing housing 17 being connected to said first intermediate flange 14 by a second intermediate flange 18 on the side close to the packing gland 11, said first bearing housing 17 being provided with a first bearing housing gland 31 on the side remote from the packing gland 11, a self-aligning spherical roller bearing 19 being provided in a cavity formed between said first bearing housing 17, first bearing housing gland 31 and the discharge roller 7 for withstanding radial forces and partial axial forces of the discharge roller 7.

Illustratively, a sealing gasket 38 is disposed between the first bearing seat 17 and the first bearing seat gland 31.

The side of the first bearing seat gland 31 far away from the first bearing seat 17 is provided with a first bearing seal seat 20 and a first bearing seal seat gland 21, and a first vehicle-type rotary seal structure 22 is arranged in a cavity formed among the first bearing seal seat 20, the first bearing seal seat gland 21 and the discharging roller 7 to form a first vehicle-type rotary seal system. The first vehicle rotary seal system acts as a second dynamic seal after the packing dynamic seal system.

Illustratively, a seal cushion 38 is disposed between the first bearing seal mount 20 and the first bearing mount gland 31.

Illustratively, as shown in fig. 1 and 4, a second bearing support system is provided on the side of the first bearing support system remote from the shaft furnace, said second bearing support system comprising a second bearing housing 23, said second bearing housing 23 being provided with a second bearing housing gland 24 on the side remote from the shaft furnace, and tapered roller bearings 48 being provided in the cavities formed between said second bearing housing 23, second bearing housing gland 24 and the discharge rollers 7 for withstanding the radial and axial forces of the discharge rollers 7.

Illustratively, there are 2 tapered roller bearings 48, and an oil ring 39 is provided between two of the tapered roller bearings 48 for lubricating the tapered roller bearings 48.

Illustratively, spacers 40 are arranged between the second bearing cover 23 and the discharge roller 7, between the second bearing cover 24 and the discharge roller 7 and between the oil ring 39 and the discharge roller 7, and are used for fixing and positioning the inner ring of the tapered roller bearing 48 through round nuts.

Illustratively, O-rings are provided between the spacer 40 remote from the tapered roller bearing 48 and the discharge roller 7, and between the spacer 40 and the second bearing gland 24.

A third intermediate flange 25 is arranged between the second bearing gland 24 and the driving device 8, the third intermediate flange 25 is connected with the driving device 8, a third intermediate flange gland 26 is arranged on one side of the third intermediate flange 25, which is close to the driving device 8, and a second vehicle type rotary sealing structure 27 is arranged in a cavity formed among the third intermediate flange 25, the third intermediate flange gland 26 and the discharging roller 7 to form a second vehicle type rotary sealing system.

An O-ring 41 is illustratively provided between the third intermediate flange 25 and the discharge roll 7.

Illustratively, the bottom screw discharger of the pure hydrogen shaft furnace further comprises a first bearing housing sleeve 28 and a second bearing housing sleeve 29;

the first bearing seat sleeve 28 is sleeved between the first bearing support system and the second bearing support system, one end of the first bearing seat sleeve 28, which is close to the first bearing support system, is connected with the second intermediate flange 18 and the first intermediate flange 14, one end of the first bearing seat sleeve 28, which is far away from the first bearing support system, is connected with the second bearing seat 23, and a first airtight cavity is formed among the first bearing seat sleeve 28, the second intermediate flange 18, the first bearing seat 17, the second bearing seat 23 and the discharging roller 7.

Illustratively, the end of the first bearing housing sleeve 28 adjacent the first bearing support system is coupled to the second intermediate flange 18, the first intermediate flange 14 by a second fastener 42; the end of the first bearing housing sleeve 28 remote from the first bearing support system is connected to the second bearing housing 23 by a third fixing member 43.

The second bearing sleeve 29 is sleeved between the second bearing support system and the third intermediate flange 25, one end of the second bearing sleeve 29, which is close to the second bearing support system, is connected with the second bearing support 23, one end of the second bearing sleeve 29, which is close to the third intermediate flange 25, is connected with the third intermediate flange 25, and a second airtight cavity is formed among the second bearing sleeve 29, the second bearing support 23, the third intermediate flange 25 and the discharging roller 7.

Illustratively, the end of the second bearing sleeve 29 adjacent to the second bearing support system is connected to the second bearing housing 23 by a fourth fixture 44, and the end of the second bearing sleeve 29 adjacent to the third intermediate flange 25 is connected to the third intermediate flange 25 by a fifth fixture 45.

The first closed cavity and the second closed cavity are respectively connected with a nitrogen pipeline 30. The nitrogen pipeline 30 is used for introducing nitrogen into the first closed cavity and the second closed cavity. Nitrogen with the pressure of 0.4Mpa is respectively filled into the first closed cavity and the second closed cavity through the nitrogen pipeline 30 so as to balance the hydrogen pressure (0.38 Mpa) in the furnace, and once the packing dynamic seal system or the vehicle type rotary seal system leaks or fails, a small amount of nitrogen can enter the furnace, and the nitrogen pushes back the hydrogen to avoid the hydrogen leakage because the nitrogen pressure is slightly higher than the hydrogen pressure in the furnace.

Illustratively, the spiral discharging device at the bottom of the pure hydrogen shaft furnace reduction furnace further comprises a bearing cooling water pipe 46, wherein the bearing cooling water pipe 46 is respectively connected with the first bearing seat 17, the water inlet pipeline 33 and the water return pipeline 34, and a cooling water circulation is formed among the first bearing seat 17, the water inlet pipeline 33 and the water return pipeline 34 so as to cool the first bearing support system.

Illustratively, the first bearing seat 17 and the second bearing seat 23 are respectively provided with oil injection pipelines 47 for injecting lubricating oil into the self-aligning spherical roller bearing 19 and the tapered roller bearing 48 to lubricate the bearings.

The bottom spiral discharging device of the pure hydrogen shaft furnace reduction furnace further comprises a first supporting seat 50 and a second supporting seat 51, wherein the first supporting seat 50 is used for supporting the discharging roller 7, the second supporting seat 51 is used for supporting the driving device 8, and the bottoms of the first supporting seat 50 and the second supporting seat 51 can be connected with the shaft furnace through a shaft furnace platform to realize fixation.

On the other hand, the utility model also provides a pure hydrogen shaft furnace, which comprises the spiral discharging device at the bottom of the pure hydrogen shaft furnace.

As shown in fig. 5, the bottom of the pure hydrogen shaft furnace is provided with 4-8 discharging areas (fig. 5 is a front view cross section and only shows 2 discharging areas), each discharging area is provided with a discharging opening 49, and each discharging opening 49 is provided with a spiral discharging device of the utility model.

When the device is implemented, high-temperature materials enter the bottom of the pure hydrogen shaft furnace, and under the pushing of the spiral blades of the spiral discharging device, the materials enter each discharging hole, and the materials are discharged through the discharging holes to a subsequent cooling device for cooling.

The present utility model is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present utility model are intended to be included in the scope of the present utility model.

Claims

1. The spiral discharging device for the bottom of the reducing furnace of the pure hydrogen shaft furnace is characterized by comprising a discharging roller (7), a driving device (8) and spiral blades extending along the periphery of the discharging roller (7), wherein the driving device (8) is arranged at one end of the discharging roller (7), the spiral blades are arranged at the other end of the discharging roller (7), one end of the discharging roller (7) provided with the spiral blades is positioned in the shaft furnace, and the discharging roller (7) is connected with the shaft furnace in a cantilever mode;

one end of the spiral blade, which is close to the driving device (8), is provided with a supporting baffle ring (3), the supporting baffle ring (3) is sleeved on the discharging roller (7) and welded with the periphery of the discharging roller (7), and the inside of the supporting baffle ring (3) is provided with a heat-insulating refractory material.

2. The spiral discharging device of the bottom of the pure hydrogen shaft furnace reduction furnace according to claim 1, wherein the spiral blades comprise a positive spiral blade (1) and a negative spiral blade (2) which are sequentially arranged from a first shaft head (9) of the discharging roller (7) positioned in the shaft furnace to the inner wall of the shaft furnace, the spiral directions of the positive spiral blade (1) and the negative spiral blade (2) are opposite, and the supporting baffle ring (3) is arranged at one end, close to the inner wall of the shaft furnace, of the negative spiral blade (2).

3. The spiral discharging device of the bottom of the pure hydrogen shaft furnace reduction furnace according to claim 1, wherein the discharging roller (7) comprises an outer cylinder (4), an inner cylinder (5) and an axle center pipe (6) which are sequentially sleeved from outside to inside, the ends of the outer cylinder (4), the inner cylinder (5) and the axle center pipe (6) which are positioned in the shaft furnace are all welded with a first shaft head (9), a pipe inner cavity of the axle center pipe (6) is communicated with a cavity between the outer cylinder (4) and the inner cylinder (5) through a shaft head water through hole (901) on the first shaft head (9), and a cavity between the outer cylinder (4) and the inner cylinder (5) is communicated with a cavity between the inner cylinder (5) and the axle center pipe (6) through an inner cylinder water through hole (501) on the inner cylinder (5).

4. The spiral discharging device of the bottom of the pure hydrogen shaft furnace reduction furnace according to claim 1, characterized in that a packing gland (10) and a packing gland cover (11) are arranged on one side of the supporting baffle ring (3) far away from the spiral blade, and a graphite fiber woven filler (12) is filled in a cavity formed among the packing gland cover (10), the packing gland cover (11) and the discharging roller (7).

5. The spiral discharging device for the bottom of the reducing furnace of the pure hydrogen shaft furnace according to claim 4, further comprising an outer sleeve (13), wherein the outer sleeve (13) is sleeved at a position, close to the outer wall of the shaft furnace, of the discharging roller (7), one end, close to the outer wall of the shaft furnace, of the outer sleeve (13) is welded with the outer wall of the shaft furnace, and one end, far away from the outer wall of the shaft furnace, of the outer sleeve (13) is connected with the packing sealing sleeve (10) through a first middle flange (14).

6. The screw bottom discharge device for a pure hydrogen shaft furnace reduction furnace according to claim 5, characterized in that a shaft furnace annular inner masonry wall (15) is arranged around the discharge roller (7) along the extension direction of the screw blades, and that fiber cotton (16) is arranged in the cavity formed between the support baffle ring (3), the shaft furnace annular inner masonry wall (15), the first intermediate flange (14), the packing gland (10) and the discharge roller (7).

7. The spiral discharging device of the bottom of the pure hydrogen shaft furnace according to claim 5, characterized in that a first bearing support system is arranged on one side of the packing gland cover (11) far away from the shaft furnace, the first bearing support system comprises a first bearing seat (17), one side of the first bearing seat (17) close to the packing gland cover (11) is connected with the first intermediate flange (14) through a second intermediate flange (18), a first bearing seat gland cover (31) is arranged on one side of the first bearing seat (17) far away from the packing gland cover (11), and a self-aligning spherical roller bearing (19) is arranged in a cavity formed among the first bearing seat (17), the first bearing seat gland cover (31) and the discharging roller (7);

one side of the first bearing seat gland (31) far away from the first bearing seat (17) is provided with a first bearing seal seat (20) and a first bearing seal seat gland (21), and a first vehicle-mounted rotary seal structure (22) is arranged in a cavity formed among the first bearing seal seat (20), the first bearing seal seat gland (21) and the discharging roller (7).

8. The bottom screw discharge device for a pure hydrogen shaft furnace according to claim 7, characterized in that a second bearing support system is provided on the side of the first bearing support system remote from the shaft furnace, said second bearing support system comprising a second bearing housing (23), a second bearing housing gland (24) being provided on the side of the second bearing housing (23) remote from the shaft furnace, tapered roller bearings (48) being provided in the cavities formed between the second bearing housing (23), the second bearing housing gland (24) and the discharge rollers (7);

a third middle flange (25) is arranged between the second bearing gland (24) and the driving device (8), the third middle flange (25) is connected with the driving device (8), a third middle flange gland (26) is arranged on one side, close to the driving device (8), of the third middle flange (25), and a second vehicle type rotary sealing structure (27) is arranged in a cavity formed among the third middle flange (25), the third middle flange gland (26) and the discharging roller (7).

9. The bottom screw conveyor of a pure hydrogen shaft furnace according to claim 8, characterized in that the bottom screw conveyor further comprises a first bearing housing sleeve (28) and a second bearing housing sleeve (29);

the first bearing seat sleeve (28) is sleeved between the first bearing support system and the second bearing support system, one end of the first bearing seat sleeve (28) close to the first bearing support system is connected with the second intermediate flange (18) and the first intermediate flange (14), one end of the first bearing seat sleeve (28) far away from the first bearing support system is connected with the second bearing seat (23), and a first closed cavity is formed among the first bearing seat sleeve (28), the second intermediate flange (18), the first bearing seat (17), the second bearing seat (23) and the discharging roller (7);

the second bearing sleeve (29) is sleeved between the second bearing support system and the third intermediate flange (25), one end of the second bearing sleeve (29) close to the second bearing support system is connected with the second bearing seat (23), one end of the second bearing seat sleeve (29) close to the third intermediate flange (25) is connected with the third intermediate flange (25), and a second airtight cavity is formed among the second bearing sleeve (29), the second bearing seat (23), the third intermediate flange (25) and the discharging roller (7);

the first closed cavity and the second closed cavity are respectively connected with a nitrogen pipeline (30).

10. A pure hydrogen shaft furnace, characterized in that it comprises a pure hydrogen shaft furnace reduction hearth screw discharge device according to any one of claims 1-9.