A pure hydrogen shaft furnace reduction furnace bottom discharge system

Abstract

The present application relates to a kind of pure hydrogen shaft furnace reduction furnace bottom discharge system, belong to pure hydrogen shaft furnace reduction technical field, solve the problem that the bottom of the existing technology in shaft furnace reduction is easily formed dead material area due to material accumulation.Pure hydrogen shaft furnace reduction furnace bottom is provided with a vertical loosening device in the center, the vertical loosening device vertically penetrates pure hydrogen shaft furnace reduction furnace bottom, multiple discharge zones are set around the vertical loosening device, each discharge zone is provided with a discharge port, and a spiral discharge device is arranged in each discharge port;Vertical loosening device includes top cone, loosening roller, driving device arranged from top to bottom in turn and helical blade extending along the outer periphery of loosening roller in axial direction, driving device is arranged at one end of loosening roller outside the furnace, and top cone and helical blade are arranged at one end of loosening roller inside the furnace;Spiral discharge device penetrates the furnace wall of shaft furnace reduction furnace, and spiral discharge device and shaft furnace reduction furnace are arranged in cantilever mode.The system can prevent the formation of dead material area in furnace bottom.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of pure hydrogen shaft furnace reduction technology, and particularly relates to a pure hydrogen shaft furnace reduction furnace bottom discharging system. BACKGROUND

[0002] Developing hydrogen metallurgical process is an inevitable trend of process selection for CO2 emission reduction in the steel industry, and pure hydrogen shaft furnace is a key technology for realizing CO2 ultra-low emission and near-zero emission in the steel industry.

[0003] In the existing pure hydrogen shaft furnace reduction furnace, a discharging device is usually arranged at the bottom of the reduction furnace, and high-temperature metallized pellets are discharged through the discharging device. The oxidized pellets entering the shaft furnace from the preheating zone become sponge iron when coming down from the reduction zone. The melting point of iron is high, and it will not be soft-melted. The chemical reaction between the un-reduced gangue and ferrous oxide may generate low-melting-point compounds into sintered materials. The sintered materials entering the reduction furnace bottom and the high-temperature metallized pellets at the bottom of the furnace bottom are easy to accumulate and form a dead material area at the bottom of the furnace, which hinders the smooth discharging of the discharging device. SUMMARY

[0004] In view of the above analysis, the embodiments of the present application aim to provide a pure hydrogen shaft furnace reduction furnace bottom discharging system to solve the problem that the bottom of the shaft furnace reduction furnace is easy to form a dead material area due to material accumulation in the existing pure hydrogen shaft furnace reduction furnace bottom discharging system.

[0005] In one aspect, the embodiments of the present application provide a pure hydrogen shaft furnace reduction furnace bottom discharging system, wherein a vertical material loosening device is arranged at the center of the pure hydrogen shaft furnace reduction furnace bottom, the vertical material loosening device vertically penetrates the pure hydrogen shaft furnace reduction furnace bottom, a plurality of discharging areas are arranged around the vertical material loosening device, each discharging area is provided with a discharging port, and each discharging port is provided with a spiral discharging device.

[0006] The vertical material loosening device comprises a top cone, a material loosening roller, a vertical material loosening driving device and a spiral blade extending axially along the outer periphery of the material loosening roller arranged in sequence from top to bottom, the vertical material loosening driving device is arranged at one end of the material loosening roller outside the furnace, and the top cone and the spiral blade are arranged at one end of the material loosening roller inside the furnace.

[0007] The spiral discharging device penetrates the shaft furnace reduction furnace wall, and the spiral discharging device and the shaft furnace reduction furnace are arranged in a cantilevered manner.

[0008] Preferably, the discharging area is an annular inner lining wall arranged radially along the reduction furnace, the part of the spiral discharging device inside the furnace is horizontally arranged in the inner cavity of the annular inner lining wall, and the discharging port is arranged below the spiral discharging device.

[0009] Preferably, 4-8 discharging areas are arranged around the vertical material loosening device.

[0010] Preferably, the lower part of the discharge port is sequentially connected with a discharging chute and a discharging chute pipe from top to bottom.

[0011] Preferably, the loosening roller comprises an outer cylinder, an inner cylinder and a combined shaft, the combined shaft vertically penetrates the bottom of the pure hydrogen shaft furnace reduction furnace, the outer periphery of the in-furnace part of the combined shaft is sequentially sleeved with the inner cylinder and the outer cylinder from inside to outside, and the spiral blade is arranged on the outer periphery of the outer cylinder.

[0012] The combined shaft comprises a shaft core pipe, an inner shaft and an outer shaft which are sequentially sleeved from inside to outside, the pipe inner cavity of the shaft core pipe is communicated with the cavity between the inner cylinder and the outer cylinder through the cavity upper end, and the cavity between the inner cylinder and the outer cylinder is communicated with the cavity between the inner shaft and the outer shaft through the cavity lower end.

[0013] Preferably, the connecting part of the combined shaft and the furnace bottom is provided with a packing seal sleeve and a packing seal sleeve gland, and the cavity formed among the packing seal sleeve, the packing seal sleeve gland and the combined shaft is filled with graphite fiber woven filler.

[0014] Preferably, the side of the packing seal sleeve gland away from the furnace bottom is provided with a vertical loosening first bearing support system, and the side of the vertical loosening first bearing support system away from the furnace bottom is provided with a vertical loosening second bearing support system.

[0015] Preferably, the spiral discharging device comprises a discharging roller, a spiral discharging driving device and a spiral blade extending along the outer periphery of the discharging roller, the spiral discharging driving device is arranged at one end of the discharging roller, the spiral blade is arranged at the other end of the discharging roller, the end of the discharging roller provided with the spiral blade is located in the interior of the shaft furnace, and the discharging roller and the shaft furnace are connected in a cantilevered manner.

[0016] The end of the spiral blade close to the spiral discharging driving device is provided with a supporting block ring, the supporting block ring is sleeved on the discharging roller and welded with the outer periphery of the discharging roller, and the inside of the supporting block ring is provided with heat-insulating refractory material.

[0017] Preferably, the side of the supporting block ring away from the spiral blade is provided with a packing seal sleeve and a packing seal sleeve gland, and the cavity formed among the packing seal sleeve, the packing seal sleeve gland and the discharging roller is filled with graphite fiber woven filler.

[0018] The spiral discharging device further comprises an outer pipe sleeve, the outer pipe sleeve is sleeved on the position of the discharging roller close to the outer wall of the shaft furnace, one end of the outer pipe sleeve close to the outer wall of the shaft furnace is welded with the outer wall of the shaft furnace, and the other end of the outer pipe sleeve away from the outer wall of the shaft furnace is connected with the packing seal sleeve through a spiral discharging first intermediate flange.

[0019] Preferably, the pure hydrogen shaft furnace is provided with a shaft furnace annular inner masonry wall around the discharge roller in the extension direction of the spiral blade, a cavity is formed between the support retaining ring, the shaft furnace annular inner masonry wall, the spiral discharge first intermediate flange, the packing seal sleeve and the discharge roller, and the cavity is provided with fiber cotton;

[0020] A spiral discharge first bearing support system is arranged on the side of the packing seal sleeve away from the shaft furnace, and a spiral discharge second bearing support system is arranged on the side of the spiral discharge first bearing support system away from the shaft furnace.

[0021] Compared with the prior art, the present application can achieve at least one of the following beneficial effects:

[0022] 1. The pure hydrogen shaft furnace reduction furnace bottom discharge system is provided with a plurality of discharge areas at the reduction furnace bottom, the spiral discharge device and the vertical loosening device cooperate, the vertical loosening drive device on the vertical loosening device can drive the loosening roller to rotate forward and reverse to drive the spiral blade to rotate forward and reverse, thereby pushing the high-temperature metallized pellets to move upward and downward, realizing furnace bottom loosening, and the loosened material enters the plurality of discharge areas for dispersed discharge, and the spiral discharge device promotes discharge, effectively preventing the accumulation of high-temperature metallized pellets at the furnace bottom to form a dead material area, and promoting smooth discharge at the bottom of the shaft furnace.

[0023] 2. The spiral blade of the spiral discharge device is provided with a support retaining ring at one end close to the drive device, and the inside of the support retaining ring is provided with heat-insulating refractory material, which can play a heat-insulating role, and the support retaining ring can also play a role in blocking high-temperature metallized pellets, avoiding the high-temperature metallized pellets from approaching the shaft furnace wall, thereby reducing the high-temperature heat conduction to the discharge device drive end.

[0024] 3. The outer periphery of the discharge roller of the spiral discharge device is provided with spiral blades, and the spiral blades include forward spiral blades and reverse spiral blades, the spiral blades can play a loosening role when the discharge roller rotates, thereby preventing material accumulation, and the reverse spiral blades close to the inner wall of the shaft furnace can prevent material accumulation at the root of the shaft furnace, further preventing the accumulation of high-temperature metallized pellets at the bottom of the shaft furnace to form a dead material area.

[0025] 4. The spiral discharge device and the vertical loosening device are both provided with a cooling system for cooling the outer cylinder and the blades, meeting the requirements of high-temperature work in the furnace.

[0026] 5. The vertical unloading device is equipped with an in-furnace dustproof labyrinth sealing system, a car-type rotary dynamic sealing system, a packing dynamic sealing system, a metal gasket static sealing system, and a nitrogen static pressure sealing system to achieve multi-stage dynamic and static sealing, improving the sealing performance between the vertical unloading device and the vertical furnace during rotation and preventing hydrogen leakage; the spiral discharge device is equipped with a dustproof and heat insulation system, a car-type rotary dynamic sealing system, a packing dynamic sealing system, a metal gasket static sealing system, and a nitrogen static pressure sealing system to achieve multi-stage dynamic and static sealing, improving the sealing performance between the spiral discharge device and the vertical furnace during rotation and preventing hydrogen leakage.

[0027] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages may become apparent from the description or be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained from what is particularly pointed out in the description and drawings. Attached Figure Description

[0028] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0029] Figure 1 This invention relates to a pure hydrogen vertical shaft furnace reduction furnace bottom discharge system;

[0030] Figure 2 This is a front cross-sectional view of the vertical loosening device of the present invention;

[0031] Figure 3 This is a schematic diagram of the structure of the material release roller of the present invention;

[0032] Figure 4 for Figure 2 Enlarged view of part A in the image;

[0033] Figure 5 for Figure 2 Enlarged view of part B in the image;

[0034] Figure 6 This is a front sectional view of the spiral discharge device of the present invention;

[0035] Figure 7 This is a schematic diagram of the structure of the discharge roller of the present invention;

[0036] Figure 8 for Figure 6 Enlarged view of part A in the image;

[0037] Figure 9 for Figure 6 A magnified view of part B in the image.

[0038] Reference signs:

[0039] 01 - vertical loosening device; 02 - spiral discharge device;

[0040] 1-top cone (loosening device); 2-loosening roller (loosening device); 3-vertical loosening drive device (loosening device); 4-spiral blade (loosening device); 5-vertical loosening outer cylinder (loosening device); 6-vertical loosening inner cylinder (loosening device); 601-inner cylinder upper water hole (loosening device); 602-inner cylinder lower water hole (loosening device); 7-combined shaft (loosening device); 701-outer shaft (loosening device); 702-inner shaft (loosening device); 703-vertical loosening shaft core tube (loosening device); 704-sealing gasket (loosening device); 705-sealing ring (loosening device); 706-inner shaft upper water hole (loosening device); 707-inner shaft lower water hole (loosening device); 708-separation plate (loosening device); 709-separation plate water hole (loosening device); 8-tray (loosening device); 9-pressing cover (loosening device); 10-labyrinth flange (loosening device); 11-support flange (loosening device); 12-vertical loosening packing seal sleeve (loosening device); 13-vertical loosening packing seal sleeve pressing cover (loosening device); 14-graphite fiber woven packing (loosening device); 15-vertical loosening first bearing seat (loosening device); 16-vertical loosening first bearing seat pressing cover (loosening device); 17-thrust self-aligning roller bearing (loosening device); 18-self-aligning roller bearing (loosening device); 19-vertical loosening first bearing sealing seat (loosening device); 20-vertical loosening first bearing sealing seat pressing cover (loosening device); 21-vertical loosening first car type rotary sealing structure (loosening device); 22-vertical loosening first intermediate flange (loosening device); 23-vertical loosening second bearing seat (loosening device); 24-vertical loosening second bearing seat pressing cover (loosening device); 25-vertical loosening tapered roller bearing (loosening device); 26-vertical loosening second intermediate flange (loosening device); 27-vertical loosening second intermediate flange pressing cover (loosening device); 28-vertical loosening second car type rotary sealing structure (loosening device); 29-vertical loosening first bearing seat sleeve (loosening device); 30-vertical loosening second bearing seat sleeve (loosening device); 31-vertical loosening nitrogen pipeline (loosening device); 32-metal sealing gasket ring (loosening device); 33-vertical loosening water inlet pipeline (loosening device); 34-vertical loosening water return pipeline (loosening device); 35-vertical loosening bidirectional rotary water joint (loosening device); 36-vertical loosening bidirectional rotary water joint flange (loosening device); 37-shaft head pressing cover (loosening device); 38-sealing rubber gasket (loosening device); 39-first blocking ring (loosening device); 40-second blocking ring (loosening device); 41-oil ring (loosening device); 42-vertical loosening separation sleeve (loosening device); 43-vertical loosening first fixing member (loosening device); 44-vertical loosening second fixing member (loosening device); 45-vertical loosening third fixing member (loosening device); 46-vertical loosening fourth fixing member (loosening device); 47-vertical loosening bearing cooling water pipe (loosening device);48 - vertical oil injection line (loosening device); 49 - discharge port; 50 - falling chute; 51 - falling pipe;

[0041] 1a-Positive helical blade (discharge device); 2a-Negative helical blade (discharge device); 3a-Supporting retaining ring (discharge device); 4a-Helical discharge outer cylinder (discharge device); 5a-Helical discharge inner cylinder (discharge device); 501a- Inner cylinder water hole (discharge device); 502a-Partition (discharge device); 503a-Partition water hole (discharge device); 6a-Helical discharge shaft tube (discharge device); 7a-Discharge roller (discharge device); 8a-Helical discharge driving device (discharge device); 9a-First shaft head (discharge device); 901a-Shaft head water hole (discharge device); 10a-Helical discharge packing seal sleeve (discharge device); 11a-Helical discharge packing seal sleeve gland (discharge device); 12a-Graphite fiber woven packing (discharge device); 13a-Outer tube sleeve (discharge device); 14a-Helical discharge first intermediate flange (discharge device); 15a-Ring-shaped inner masonry wall; 16a-Fiber cotton (discharge device); 17a-Helical discharge first bearing seat (discharge device); 18a-Helical discharge second intermediate flange (discharge device); 19a-Thrust spherical roller bearing (discharge device); 20a-Helical discharge first bearing seal seat (discharge device); 21a-Helical discharge first bearing seal seat gland (discharge device); 22a-Helical discharge first car type rotary sealing structure (discharge device); 23a-Helical discharge second bearing seat (discharge device); 24a-Helical discharge second bearing seat gland (discharge device); 25a-Helical discharge third intermediate flange (discharge device); 26a-Helical discharge third intermediate flange gland (discharge device); 27a-Helical discharge second car type rotary sealing structure (discharge device); 28a-Helical discharge first bearing seat sleeve (discharge device); 29a-Helical discharge second bearing seat sleeve (discharge device); 30a-Helical discharge nitrogen pipeline (discharge device); 31a-Helical discharge first bearing seat gland (discharge device); 32a-Helical discharge bidirectional rotary water joint flange (discharge device); 33a-Helical discharge water inlet pipeline (discharge device); 34a-Helical discharge water return pipeline (discharge device); 35a-Helical discharge bidirectional rotary water joint (discharge device); 36a-First fixing member (discharge device); 37a-Metallic gasket ring (discharge device); 38a-Sealing rubber gasket (discharge device); 39a-Oil ring (discharge device); 40a-Helical discharge spacer sleeve (discharge device); 41a-O-shaped sealing ring (discharge device); 42a-Second fixing member (discharge device); 43a-Third fixing member (discharge device); 44a-Fourth fixing member (discharge device); 45a-Fifth fixing member (discharge device); 46a-Helical discharge bearing cooling water pipe (discharge device); 47a-Helical discharge oil injection pipeline (discharge device); 48a-Helical discharge tapered roller bearing (discharge device); 49a-First support seat (discharge device); 50a-Second support seat (discharge device). DETAILED DESCRIPTION

[0042] The preferred embodiments of the present application will be described in detail below with reference to the drawings, which form a part of this application. The drawings illustrate embodiments of the application and, together with the description, serve to explain the principles of the application, and to enable the skilled in the art to make and use the application.

[0043] The present application provides a pure hydrogen shaft furnace reduction bottom discharge system, as shown in Figure 1-2 The pure hydrogen shaft furnace reduction bottom is centrally provided with a vertical material loosening device 01, the vertical material loosening device 01 vertically penetrates the pure hydrogen shaft furnace reduction bottom, a plurality of discharge areas are provided around the vertical material loosening device 01, each discharge area is provided with a discharge port 49, and each discharge port 49 is provided with a spiral discharge device 02.

[0044] The vertical material loosening device 01 comprises a top cone 1, a material loosening roller 2, a vertical material loosening driving device 3, and a spiral blade 4 extending axially along the outer periphery of the material loosening roller 2, which are sequentially arranged from top to bottom, the vertical material loosening driving device 3 is arranged at one end of the material loosening roller 2 outside the furnace, and the top cone 1 and the spiral blade 4 are arranged at one end of the material loosening roller 2 inside the furnace.

[0045] The spiral discharge device 02 penetrates the shaft furnace reduction furnace wall, and the spiral discharge device 02 is cantilevered between the shaft furnace reduction furnace.

[0046] In implementation, during the process of high-temperature metallized pellets entering the bottom of the pure hydrogen shaft furnace reduction, under the guidance of the top cone 1, the high-temperature metallized pellets fall around the material loosening roller 2, the material loosening roller 2 is driven by the vertical material loosening driving device 3 to rotate forward and reverse, the spiral blade 4 is driven by the material loosening roller 2 to rotate forward and reverse, and then the high-temperature metallized pellets are pushed upward and downward to realize the material loosening of the bottom of the furnace; at the same time, under the pushing of the spiral discharge device at the bottom of the furnace, the high-temperature metallized pellets enter each discharge port, and the material is discharged through the discharge port to the subsequent cooling device for cooling.

[0047] Compared with the prior art, the pure hydrogen shaft furnace reduction bottom discharge system of the present application sets a plurality of discharge areas at the bottom of the reduction furnace, the spiral discharge device and the vertical material loosening device cooperate, the driving device on the vertical material loosening device can drive the material loosening roller to rotate forward and reverse to drive the spiral blade to rotate forward and reverse, and then the high-temperature metallized pellets are pushed upward and downward to realize the material loosening of the bottom of the furnace, the loose material enters the plurality of discharge areas for dispersed discharge, and the horizontally arranged spiral discharge device promotes the discharge, effectively preventing the accumulation of high-temperature metallized pellets at the bottom of the furnace to form a dead material area, and promoting the smooth discharge of the bottom of the shaft furnace.

[0048] Exemplarily, as shown in Figure 1 and Figure 6As shown, the discharge area is an annular inner lining wall 15a arranged radially along the reduction furnace, and the spiral discharge device 02 is arranged horizontally in the inner cavity of the annular inner lining wall 15a.

[0049] Exemplarily, 4-8 discharge areas are arranged around the vertical loosening device 01, Figure 1 As shown, the vertical loosening device 01 is arranged in the central area surrounded by the 4-8 discharge areas.

[0050] Exemplarily, the lower part of the discharge port 49 is sequentially connected with a discharging chute 50 and a discharging chute pipe 51 from top to bottom.

[0051] Exemplarily, as shown, Figure 3 The loosening roller 2 includes a vertical loosening outer cylinder 5, a vertical loosening inner cylinder 6, and a combined shaft 7, the combined shaft 7 vertically penetrates the bottom of the pure hydrogen shaft furnace reduction furnace, the outer periphery of the combined shaft 7 in the furnace is sequentially sleeved with the vertical loosening inner cylinder 6 and the vertical loosening outer cylinder 5 from inside to outside, and the spiral blade 4 is arranged on the outer periphery of the vertical loosening outer cylinder 5.

[0052] The combined shaft 7 includes a vertical loosening shaft core pipe 703, an inner shaft 702, and an outer shaft 701, which are sequentially sleeved from inside to outside, the pipe inner cavity of the vertical loosening shaft core pipe 703 is communicated with the cavity between the vertical loosening inner cylinder 6 and the vertical loosening outer cylinder 5 through the cavity upper end, the cavity between the vertical loosening inner cylinder 6 and the vertical loosening outer cylinder 5 is communicated with the cavity between the inner shaft 702 and the outer shaft 701 through the cavity lower end, forming a cooling system for cooling the outer cylinder and the blade to meet the requirement of high-temperature work in the furnace.

[0053] Specifically, the combined shaft 7 is provided with a vertical loosening bidirectional rotating water joint 35 at the end away from the shaft furnace, the water inlet cavity of the vertical loosening bidirectional rotating water joint 35 is communicated with the pipe inner cavity of the vertical loosening shaft core pipe 703, the pipe inner cavity of the vertical loosening shaft core pipe 703 is further communicated with the cavity between the vertical loosening inner cylinder 6 and the vertical loosening outer cylinder 5 through the through hole at the upper end of the vertical loosening shaft core pipe 703, the inner shaft upper water passage hole 706, and the inner cylinder upper water passage hole 601, the cavity between the vertical loosening inner cylinder 6 and the vertical loosening outer cylinder 5 is communicated with the cavity between the inner shaft 702 and the outer shaft 701 through the inner cylinder lower water passage hole 602 at the lower end of the vertical loosening inner cylinder 6, and is further communicated with the cavity between the vertical loosening shaft core pipe 703 and the inner shaft 702 through the inner shaft lower water passage hole 707 of the inner shaft 702, and finally is communicated with the water return cavity of the vertical loosening bidirectional rotating water joint 35 through the partition plate water passage hole 709 on the partition plate 708.

[0054] Further, the pure hydrogen shaft furnace bottom vertical material loosening device further comprises a vertical material loosening water inlet pipeline 33 and a vertical material loosening water return pipeline 34, a vertical material loosening bidirectional rotating water joint 35 is connected with the combined shaft 7 through a vertical material loosening bidirectional rotating water joint flange 36, the vertical material loosening water inlet pipeline 33 is communicated with the inner cavity of the vertical material loosening shaft core pipe 703 through the vertical material loosening bidirectional rotating water joint 35, and the vertical material loosening water return pipeline 34 is communicated with the cavity between the vertical material loosening shaft core pipe 703 and the inner shaft 702 through the vertical material loosening bidirectional rotating water joint 35.

[0055] In implementation, the cooling water enters the inner cavity of the vertical material loosening shaft core pipe 703 through the water inlet cavity of the vertical material loosening bidirectional rotating water joint 35 and the vertical material loosening water inlet pipeline 33, then sequentially passes through the through hole at the upper end of the vertical material loosening shaft core pipe 703, the inner shaft upper water passage 706, the inner cylinder upper water passage 601, enters the cavity between the vertical material loosening outer cylinder 5 and the vertical material loosening inner cylinder 6, then passes through the inner shaft lower water passage 707 of the inner shaft 702 to enter the cavity between the vertical material loosening shaft core pipe 703 and the inner shaft 702, and finally passes through the partition plate water passage 709 on the partition plate 708 to be communicated with the water return cavity of the vertical material loosening bidirectional rotating water joint 35, and is discharged through the vertical material loosening water return pipeline 34, so that the outer cylinder and the blade are cooled.

[0056] Further, the outer surface of the vertical material loosening inner cylinder 6 is provided with a plurality of helical water grooves extending along the axial direction of the vertical material loosening inner cylinder 6, so that the cooling water cavity between the vertical material loosening inner cylinder 6 and the vertical material loosening outer cylinder 5 is a helical structure water cavity, and the cooling effect is improved.

[0057] Illustratively, the lower end of the vertical material loosening outer cylinder 5 is provided with a tray 8, the tray 8 is sleeved and welded on the outer periphery of the combined shaft 7, and the lower end of the vertical material loosening outer cylinder 5 is welded with the tray 8; the upper end of the vertical material loosening outer cylinder 5 is provided with a gland 9, the gland 9 is welded with the upper end of the vertical material loosening outer cylinder 5, and the top cone body 1 and the combined shaft 7 are connected with the gland 9.

[0058] Specifically, the gland 9 is provided with a shaft head gland 37, and the shaft head gland 37, the gland 9 and the combined shaft 7 are connected through bolts. A sealing gasket 704 between the shaft head gland 37 and the gland 9 plays a role of sealing water at the upper end of the combined shaft 7.

[0059] Illustratively, the lower end of the vertical material loosening inner cylinder 6 is connected with the tray 8, and the upper end of the vertical material loosening inner cylinder 6 is pressed tightly by the gland 9.

[0060] The tray 8 is provided with a labyrinth flange 10 away from one side of the spiral blade 4, the labyrinth flange 10 is provided with a support flange 11 away from one side of the tray 8, the support flange 11 and the labyrinth flange 10 match to form a multi-channel annular dustproof labyrinth, the support flange 11 is connected with the pure hydrogen shaft furnace reduction furnace bottom to form a dustproof labyrinth sealing system in the furnace.

[0061] Specifically, the lower surface of the labyrinth flange 10 is provided with a labyrinth protrusion, and the upper surface of the support flange 11 is provided with a multi-channel annular labyrinth groove matched with the labyrinth protrusion.

[0062] In implementation, the vertical material loosening driving device 3 drives the rotation of the combined shaft 7, the combined shaft 7 drives the rotation of the tray 8, and in turn drives the rotation of the vertical material loosening outer cylinder 5 and the spiral blade 4, and the spiral blade 4 realizes material loosening; the labyrinth flange 10 rotates together with the tray 8 through the labyrinth structure, and the labyrinth sealing system can prevent high-temperature dust in the furnace body from entering the upper part of the vertical material loosening packing seal sleeve 12 and accumulating, thereby reducing the abrasion of the graphite fiber woven filler 14.

[0063] In order to improve the sealing between the vertical material loosening device and the shaft furnace, as shown in Figure 2 and Figure 4 , the combined shaft 7 is provided with a vertical material loosening packing seal sleeve 12 and a vertical material loosening packing seal sleeve gland 13 at the connection with the furnace bottom, the cavity formed between the vertical material loosening packing seal sleeve 12, the vertical material loosening packing seal sleeve gland 13 and the combined shaft 7 is filled with a graphite fiber woven filler 14, forming a packing dynamic sealing system, which is the first dynamic sealing of the vertical material loosening device, and is used to prevent high-temperature hydrogen in the furnace from leaking through the gap between the outer surface of the combined shaft 7 and the shaft furnace.

[0064] Exemplarily, the vertical material loosening packing seal sleeve 12 and the vertical material loosening packing seal sleeve gland 13 are connected by bolts.

[0065] Exemplarily, the vertical material loosening packing seal sleeve gland 13 is provided with a vertical material loosening first bearing support system away from one side of the furnace bottom, the vertical material loosening first bearing support system includes a vertical material loosening first bearing seat 15, the vertical material loosening first bearing seat 15 is provided with a vertical material loosening first bearing seat gland 16 away from one side of the vertical material loosening packing seal sleeve gland 13, and the cavity formed between the vertical material loosening first bearing seat 15, the vertical material loosening first bearing seat gland 16 and the combined shaft 7 is provided with a thrust angular contact roller bearing 17 and an angular contact roller bearing 18; the thrust angular contact roller bearing 17 is used to bear the downward axial force transmitted by the combined shaft 7, which comes from a part of the gravity of the pellets in the furnace and the gravity of the vertical material loosening device; the angular contact roller bearing 18 is used to bear the radial force of the combined shaft 7 close to the shaft furnace.

[0066] The vertical material loosening first bearing seat cover 16 is provided with a vertical material loosening first bearing seal seat 19 and a vertical material loosening first bearing seal seat cover 20 on the side away from the vertical material loosening first bearing seat 15, and a vertical material loosening first vehicle type rotary seal structure 21 is arranged in the cavity formed between the vertical material loosening first bearing seal seat 19, the vertical material loosening first bearing seal seat cover 20 and the combined shaft 7, thereby forming a first vehicle type rotary seal system. The first vehicle type rotary seal system is the second dynamic seal after the packing dynamic seal system of the vertical material loosening device.

[0067] Exemplarily, Figure 3 In the embodiment, the tray 8 and the outer shaft 701 are in a separable structure, and an O-shaped sealing ring 705 is arranged between the tray 8 and the outer shaft 701 to achieve water sealing.

[0068] Exemplarily, a sealing rubber gasket 38 is arranged between the vertical material loosening first bearing seal seat 19 and the vertical material loosening first bearing seat cover 16.

[0069] Exemplarily, the thrust self-aligning roller bearing 17 is arranged on the upper end of the self-aligning roller bearing 18 close to the shaft furnace, the thrust self-aligning roller bearing 17 is provided with a first retainer ring 39 on the side away from the self-aligning roller bearing 18, and a second retainer ring 40 is arranged between the thrust self-aligning roller bearing 17 and the self-aligning roller bearing 18. The first retainer ring 39 and the second retainer ring 40 are used for bearing positioning and transmitting axial force.

[0070] The thrust self-aligning roller bearing 17 and the self-aligning roller bearing 18 are both existing standard parts.

[0071] Exemplarily, a vertical material loosening first intermediate flange 22 is arranged between the vertical material loosening first bearing seat 15 and the support flange 11, the vertical material loosening first intermediate flange 22 is connected with the support flange 11, and the vertical material loosening first bearing seat 15 and the vertical material loosening packing seal sleeve 12 are both connected with the vertical material loosening first intermediate flange 22.

[0072] Exemplarily, as shown in Figure 2 and Figure 5 As shown in the vertical material loosening first bearing support system, a vertical material loosening second bearing support system is arranged on the side away from the furnace bottom, the vertical material loosening second bearing support system comprises a vertical material loosening second bearing seat 23, the vertical material loosening second bearing seat 23 is provided with a vertical material loosening second bearing seat cover 24 on the side away from the furnace bottom, and a vertical material loosening tapered roller bearing 25 is arranged in the cavity formed between the vertical material loosening second bearing seat 23, the vertical material loosening second bearing seat cover 24 and the combined shaft 7; the vertical material loosening tapered roller bearing 25 is used for bearing the radial force and bidirectional axial force of the end of the combined shaft 7 away from the shaft furnace.

[0073] Exemplarily, the two vertical loose material conical roller bearings 25 are provided with an oil ring 41 between the outer rings of the two vertical loose material conical roller bearings 25 for lubricating the vertical loose material conical roller bearings 25; a vertical loose material spacer sleeve 42 is arranged between the two vertical loose material conical roller bearings 25 for axially positioning the inner rings of the vertical loose material conical roller bearings 25 and adjusting the play of the two vertical loose material conical roller bearings 25. The vertical loose material conical roller bearings 25 are standard parts.

[0074] Exemplarily, a vertical loose material spacer sleeve 42 is arranged between the vertical loose material second bearing seat 23 and the combined shaft 7, between the vertical loose material second bearing seat gland 24 and the combined shaft 7, and between the two vertical loose material conical roller bearings 25 and the combined shaft 7, for axially positioning the inner rings of the vertical loose material conical roller bearings 25; an oil seal is arranged between the vertical loose material second bearing seat 23 and the upper vertical loose material spacer sleeve 42, an O-shaped sealing ring is arranged between the lower vertical loose material spacer sleeve 42 and the combined shaft 7, and an oil seal and an O-shaped sealing ring are arranged between the vertical loose material second bearing seat gland 24 and the outer ring of the lower vertical loose material spacer sleeve 42, which play a sealing role and prevent the lubricating oil in the bearings from leaking.

[0075] Exemplarily, a vertical loose material second intermediate flange 26 is arranged between the vertical loose material second bearing seat gland 24 and the vertical loose material driving device 3, the vertical loose material second intermediate flange 26 is connected with the vertical loose material driving device 3, a vertical loose material second intermediate flange gland 27 is arranged on the side of the vertical loose material second intermediate flange 26 close to the vertical loose material driving device 3, a vertical loose material second trolley type rotary sealing structure 28 is arranged in the cavity formed between the vertical loose material second intermediate flange 26, the vertical loose material second intermediate flange gland 27 and the combined shaft 7, forming a second trolley type rotary sealing system, which is the third dynamic seal of the vertical loose material device and prevents hydrogen leakage.

[0076] In the present application, the vertical loose material first trolley type rotary sealing structure 21 and the vertical loose material second trolley type rotary sealing structure 28 are standard parts.

[0077] Exemplarily, the vertical loose material device 01 further comprises a vertical loose material first bearing seat sleeve 29 and a vertical loose material second bearing seat sleeve 30.

[0078] The vertical loose material first bearing seat sleeve pipe 29 is sleeved between the vertical loose material first bearing support system and the vertical loose material second bearing support system, one end of the vertical loose material first bearing seat sleeve pipe 29 close to the vertical loose material first bearing support system is connected with the vertical loose material first intermediate flange 22, and the other end of the vertical loose material first bearing seat sleeve pipe 29 away from the vertical loose material first bearing support system is connected with the vertical loose material second bearing seat 23, and a first closed cavity is formed between the vertical loose material first bearing seat sleeve pipe 29, the vertical loose material first intermediate flange 22, the vertical loose material first bearing seat 15, the vertical loose material second bearing seat 23 and the combined shaft 7;

[0079] The vertical loose material second bearing seat sleeve pipe 30 is sleeved between the vertical loose material second bearing support system and the vertical loose material second intermediate flange 26, one end of the vertical loose material second bearing seat sleeve pipe 30 close to the vertical loose material second bearing support system is connected with the vertical loose material second bearing seat 23, and the other end of the vertical loose material second bearing seat sleeve pipe 30 close to the vertical loose material second intermediate flange 26 is connected with the vertical loose material second intermediate flange 26, and a second closed cavity is formed between the vertical loose material second bearing seat sleeve pipe 30, the vertical loose material second bearing seat 23, the vertical loose material second intermediate flange 26 and the combined shaft 7.

[0080] The first closed cavity and the second closed cavity are respectively connected with a vertical loose material nitrogen pipe 31, and the vertical loose material nitrogen pipe 31 is used for passing nitrogen into the first closed cavity and the second closed cavity to form a nitrogen static pressure sealing system.

[0081] In implementation, the first closed cavity and the second closed cavity are respectively filled with nitrogen with a pressure of 0.4 Mpa through the vertical loose material nitrogen pipe 31 to balance the hydrogen pressure (0.38 Mpa) in the furnace, and since the nitrogen pressure is slightly higher than the hydrogen pressure in the furnace, a small amount of nitrogen will enter the furnace once the packing dynamic sealing system or the vehicle type rotary sealing system leaks or fails, and the nitrogen will push the hydrogen back to avoid hydrogen leakage.

[0082] Exemplarily, one end of the vertical loose material first bearing seat sleeve pipe 29 close to the vertical loose material first bearing support system is connected with the vertical loose material first intermediate flange 22 through a vertical loose material first fixing piece 43, the other end of the vertical loose material first bearing seat sleeve pipe 29 away from the first bearing support system is connected with the vertical loose material second bearing seat 23 through a vertical loose material second fixing piece 44, one end of the vertical loose material second bearing seat sleeve pipe 30 close to the vertical loose material second bearing support system is connected with the vertical loose material second bearing seat 23 through a vertical loose material third fixing piece 45, and the other end of the vertical loose material second bearing seat sleeve pipe 30 close to the vertical loose material second intermediate flange 26 is connected with the vertical loose material second intermediate flange 26 through a vertical loose material fourth fixing piece 46.

[0083] For example, metal sealing gaskets 32 are provided between the support flange 11 and the furnace bottom, between the support flange 11 and the first intermediate flange 22 for vertical material loosening, between the first intermediate flange 22 for vertical material loosening and the first bearing housing sleeve 29 for vertical material loosening, between the first intermediate flange 22 for vertical material loosening and the first bearing housing 15 for vertical material loosening, between the first bearing housing sleeve 29 for vertical material loosening and the second bearing housing 23 for vertical material loosening, between the second bearing housing 23 for vertical material loosening and the second bearing housing sleeve 30 for vertical material loosening, and between the second bearing housing sleeve 30 for vertical material loosening and the second intermediate flange 26 for vertical material loosening, forming a metal gasket static sealing system. The metal gasket static sealing system can withstand higher temperatures and pressures of the gas, effectively preventing leakage of high-temperature hydrogen gas and nitrogen gas in the first and second sealing cavities.

[0084] For example, since the vertical loosening bearing support system is located in the high-temperature zone at the bottom of the vertical furnace, the vertical loosening device also includes a vertical loosening bearing cooling water pipe 47. The vertical loosening bearing cooling water pipe 47 is connected to the vertical loosening bearing seat 15, the vertical loosening water inlet pipe 33, and the vertical loosening water return pipe 34, respectively, forming a cooling water circulation between the vertical loosening bearing seat 15, the vertical loosening water inlet pipe 33, and the vertical loosening water return pipe 34 to cool the first bearing support system.

[0085] For example, the first vertical loosening bearing housing 15 and the second vertical loosening bearing housing 23 are respectively provided with oil injection pipes 47 for injecting lubricating oil into the thrust self-aligning roller bearing 17, the self-aligning roller bearing 18 and the vertical loosening tapered roller bearing 25 to lubricate the bearings.

[0086] like Figure 6 As shown, the spiral discharge device includes a discharge roller 7a, a spiral discharge drive device 8a, and spiral blades extending spirally along the outer circumference of the discharge roller 7a. The spiral discharge drive device 8a is located at one end of the discharge roller 7a, and the spiral blades are located at the other end of the discharge roller 7a. The end of the discharge roller 7a with the spiral blades is located inside the vertical furnace, and the discharge roller 7a is cantilevered to the vertical furnace.

[0087] A support ring 3a is provided at one end of the spiral blade near the spiral discharge drive device 8a. The support ring 3a is sleeved on the discharge roller 7a and welded to the outer periphery of the discharge roller 7a. The interior of the support ring 3a is provided with heat-insulating and fire-resistant material.

[0088] During implementation, the spiral discharge drive device 8a drives the discharge roller 7a to rotate, and the discharge roller 7a drives the spiral blades to rotate, promoting discharge; the support retaining ring plays a role in heat insulation and blocking the high-temperature metallized pellets, thereby reducing the high-temperature heat conduction to the drive end of the discharge device.

[0089] Compared with the prior art, the spiral discharging device of the present application, the spiral blade is provided with a support baffle ring at one end close to the driving device, the inside of the support baffle ring is provided with heat-insulating refractory material, the heat-insulating refractory material can play a heat-insulating role, and the support baffle ring can also play a role of blocking high-temperature metallized pellets, avoiding the high-temperature metallized pellets from approaching the shaft furnace wall, and further reducing the high-temperature heat conduction to the driving end of the discharging device.

[0090] Exemplarily, the connection mode of the spiral blade and the discharging roller 7a is detachable connection, facilitating replacement of the blade.

[0091] Exemplarily, the spiral blade comprises a normal spiral blade 1a and an inverse spiral blade 2a which are sequentially arranged from the first shaft head 9a of the discharging roller 7a located in the shaft furnace to the inner wall of the shaft furnace, the spiral directions of the normal spiral blade 1a and the inverse spiral blade 2a are opposite, and the support baffle ring 3a is arranged at one end of the inverse spiral blade 2a close to the inner wall of the shaft furnace. When the discharging roller rotates, the spiral blade can also play a role of loosening the material, thereby preventing the material from accumulating, at the same time, the inverse spiral blade close to the inner wall of the shaft furnace can prevent the material from accumulating at the root of the shaft furnace, thereby preventing the high-temperature metallized pellets at the bottom of the shaft furnace from accumulating to form a dead material zone.

[0092] Exemplarily, the connection part of the normal spiral blade 1a and the inverse spiral blade 2a is located above the discharging port 49 of the shaft furnace, which is helpful to promote the material to be discharged from the discharging port.

[0093] Exemplarily, as shown in the figure, Figure 7 Exemplarily, the discharging roller 7a comprises a spiral discharging outer cylinder 4a, a spiral discharging inner cylinder 5a and a spiral discharging shaft core pipe 6a which are sequentially arranged from outside to inside, the end parts of the spiral discharging outer cylinder 4a, the spiral discharging inner cylinder 5a and the spiral discharging shaft core pipe 6a located in the shaft furnace are welded with the first shaft head 9a, the inner cavity of the spiral discharging shaft core pipe 6a is communicated with the cavities between the spiral discharging outer cylinder 4a and the spiral discharging inner cylinder 5a through the shaft head water passage hole 901a on the first shaft head 9a, and the cavities between the spiral discharging outer cylinder 4a and the spiral discharging inner cylinder 5a are communicated with the cavities between the spiral discharging inner cylinder 5a and the spiral discharging shaft core pipe 6a through the inner cylinder water passage hole 501a on the spiral discharging inner cylinder 5a, forming a cooling system for cooling the outer cylinder and the blade, meeting the requirement of high-temperature work in the furnace, and further reducing the high-temperature heat conduction to the driving end of the discharging device.

[0094] Further, the pure hydrogen shaft furnace bottom screw discharging device further comprises a screw discharging water inlet pipeline 33a and a screw discharging water return pipeline 34a, and the end of the discharging roller 7a away from the shaft furnace is provided with a screw discharging bidirectional rotating water joint 35a, the screw discharging bidirectional rotating water joint 35a is connected with the discharging roller 7a through a screw discharging bidirectional rotating water joint flange 32a, the water inlet cavity of the screw discharging bidirectional rotating water joint 35a is communicated with the inner cavity of the screw discharging shaft core pipe 6a, and the screw discharging water inlet pipeline 33a is communicated with the inner cavity of the screw discharging shaft core pipe 6a through the screw discharging bidirectional rotating water joint 35a; the water return cavity of the screw discharging bidirectional rotating water joint 35a is communicated with the cavity between the screw discharging inner cylinder 5a and the screw discharging shaft core pipe 6a, the screw discharging water return pipeline 34a is communicated with the water return cavity of the screw discharging bidirectional rotating water joint 35a, and the water return cavity of the screw discharging bidirectional rotating water joint 35a is communicated with the cavity between the screw discharging inner cylinder 5a and the screw discharging shaft core pipe 6a through the partition plate water hole 503a on the partition plate 502a. The partition plate 502a is arranged at the end of the cavity between the screw discharging inner cylinder 5a and the screw discharging shaft core pipe 6a away from the first shaft head 9a.

[0095] In the implementation, the cooling water enters the inner cavity of the screw discharging shaft core pipe 6a through the screw discharging water inlet pipeline 33a, then enters the cavity between the screw discharging outer cylinder 4a and the screw discharging inner cylinder 5a through the shaft head water hole 901a, then enters the cavity between the screw discharging inner cylinder 5a and the screw discharging shaft core pipe 6a through the inner cylinder water hole 501a, then flows out through the partition plate water hole 503a on the partition plate 502a, and finally is discharged through the screw discharging water return pipeline 34a, so that the outer cylinder and the blade are cooled.

[0096] The existing discharging device and the shaft furnace are usually only provided with a filler sealing structure, and the sealing performance of the structure is poor. Since the hydrogen content in the pure hydrogen shaft furnace is high, once the hydrogen leaks, there will be a great safety hazard.

[0097] Therefore, as shown in the drawings, Figure 8 In the screw discharging device, the screw discharging packing seal sleeve 10a and the screw discharging packing seal sleeve gland 11a are arranged on the side of the support blocking ring 3a away from the screw blade, the cavity formed between the screw discharging packing seal sleeve 10a, the screw discharging packing seal sleeve gland 11a and the discharging roller 7a is filled with graphite fiber woven filler 12a, a packing dynamic sealing system of the screw discharging device is formed, and the graphite fiber woven filler 12a is used for preventing hydrogen from leaking.

[0098] Exemplarily, the screw discharging packing seal sleeve 10a and the screw discharging packing seal sleeve gland 11a are connected through bolts.

[0099] Exemplarily, the spiral discharging device further comprises an outer sleeve 13a, which is sleeved on the discharging roller 7a near the outer wall of the shaft furnace, one end of the outer sleeve 13a near the outer wall of the shaft furnace is welded with the outer wall of the shaft furnace, and the other end of the outer sleeve 13a away from the outer wall of the shaft furnace is connected with the spiral discharging packing seal sleeve 10a through the spiral discharging first intermediate flange 14a.

[0100] Exemplarily, the other end of the outer sleeve 13a away from the outer wall of the shaft furnace is welded with the first fixing part 36a, the first fixing part 36a is connected with the other end of the spiral discharging first intermediate flange 14a away from the discharging roller 7a through bolts, and the end of the spiral discharging first intermediate flange 14a near the discharging roller 7a is connected with the spiral discharging packing seal sleeve 10a through bolts.

[0101] Exemplarily, the first fixing part 36a and the spiral discharging first intermediate flange 14a are provided with a metal gasket ring 37a, and the metal gasket ring 37a is arranged between the spiral discharging first intermediate flange 14a and the spiral discharging packing seal sleeve 10a.

[0102] Exemplarily, in the pure hydrogen shaft furnace, an annular inner lining wall 15a is arranged around the discharging roller 7a along the extension direction of the spiral blade, and fiber cotton 16a is arranged in the cavity formed between the support retaining ring 3a, the annular inner lining wall 15a of the shaft furnace, the spiral discharging first intermediate flange 14a, the spiral discharging packing seal sleeve 10a and the discharging roller 7a. The fiber cotton 16a can prevent dust in the furnace from being discharged and further insulate heat, that is, a dustproof and heat insulation system is formed.

[0103] Exemplarily, a spiral discharging first bearing support system is arranged on the side of the spiral discharging packing seal sleeve gland 11a away from the shaft furnace, the spiral discharging first bearing support system comprises a spiral discharging first bearing seat 17a, the spiral discharging first bearing seat 17a is connected with the spiral discharging first intermediate flange 14a on the side close to the spiral discharging packing seal sleeve gland 11a through the spiral discharging second intermediate flange 18a, and the spiral discharging first bearing seat 17a is provided with a spiral discharging first bearing seat gland 31a on the side away from the spiral discharging packing seal sleeve gland 11a, and a self-aligning spherical roller bearing 19a is arranged in the cavity formed between the spiral discharging first bearing seat 17a, the spiral discharging first bearing seat gland 31a and the discharging roller 7a, which is used to bear the radial force and part of the axial force of the discharging roller 7a.

[0104] Exemplarily, a sealing rubber gasket 38a is arranged between the spiral discharging first bearing seat 17a and the spiral discharging first bearing seat gland 31a.

[0105] The spiral discharging first bearing seat pressure cover 31a is provided with a spiral discharging first bearing sealing seat 20a and a spiral discharging first bearing sealing seat pressure cover 21a on the side away from the spiral discharging first bearing seat 17a, and a first car type rotary sealing structure 22 is arranged in the cavity formed between the spiral discharging first bearing sealing seat 20a, the spiral discharging first bearing sealing seat pressure cover 21a and the discharging roller 7a, forming a first car type rotary sealing system of the spiral discharging device. The first car type rotary sealing system is the second dynamic sealing after the packing dynamic sealing system.

[0106] Exemplarily, a sealing rubber gasket 38a is arranged between the spiral discharging first bearing sealing seat 20a and the spiral discharging first bearing seat pressure cover 31a.

[0107] Exemplarily, as shown in Figure 6 and Figure 9 , a spiral discharging second bearing support system is arranged on the side away from the shaft furnace of the spiral discharging first bearing support system, the spiral discharging second bearing support system comprises a spiral discharging second bearing seat 23a, the spiral discharging second bearing seat 23a is provided with a spiral discharging second bearing seat pressure cover 24a on the side away from the shaft furnace, and a spiral discharging tapered roller bearing 48a is arranged in the cavity formed between the spiral discharging second bearing seat 23a, the spiral discharging second bearing seat pressure cover 24a and the discharging roller 7a, for bearing the radial force and axial force of the discharging roller 7a.

[0108] Exemplarily, the spiral discharging tapered roller bearing 48a is 2, and an oil ring 39a is arranged between the two spiral discharging tapered roller bearings 48a, for lubricating the spiral discharging tapered roller bearing 48a.

[0109] Exemplarily, a spiral discharging spacer sleeve 40a is arranged between the spiral discharging second bearing seat 23a and the discharging roller 7a, between the spiral discharging second bearing seat pressure cover 24a and the discharging roller 7a, and between the oil ring 39a and the discharging roller 7a, for fixing and positioning the inner ring of the spiral discharging tapered roller bearing 48a through a round nut.

[0110] Exemplarily, an O-shaped sealing ring is arranged between the spiral discharging spacer sleeve 40a away from the spiral discharging tapered roller bearing 48a and the discharging roller 7a, and between the spiral discharging spacer sleeve 40a and the spiral discharging second bearing seat pressure cover 24a.

[0111] The third intermediate flange 25a is connected with the spiral discharging driving device 8a, and an O-shaped sealing ring 41a is arranged between the third intermediate flange 25a and the discharging roller 7a.

[0112] Exemplarily, the third intermediate flange 25a and the discharging roller 7a are provided with the O-shaped sealing ring 41a.

[0113] Exemplarily, the spiral discharging device further comprises a first bearing seat sleeve 28a and a second bearing seat sleeve 29a.

[0114] The first bearing seat sleeve 28a is sleeved between the first bearing support system and the second bearing support system, and one end of the first bearing seat sleeve 28a close to the first bearing support system is connected with the second intermediate flange 18a and the first intermediate flange 14a, and the other end of the first bearing seat sleeve 28a away from the first bearing support system is connected with the second bearing seat 23a, so that a first closed cavity is formed between the first bearing seat sleeve 28a, the second intermediate flange 18a, the first bearing seat 17a, the second bearing seat 23a and the discharging roller 7a.

[0115] Exemplarily, the one end of the first bearing seat sleeve 28a close to the first bearing support system is connected with the second intermediate flange 18a and the first intermediate flange 14a through the second fixing part 42a, and the other end of the first bearing seat sleeve 28a away from the first bearing support system is connected with the second bearing seat 23a through the third fixing part 43a.

[0116] The second bearing seat sleeve 29a is sleeved between the second bearing support system and the third intermediate flange 25a, one end of the second bearing seat sleeve 29a close to the second bearing support system is connected with the second bearing seat 23a, and the other end of the second bearing seat sleeve 29a close to the third intermediate flange 25a is connected with the third intermediate flange 25a, so that a second closed cavity is formed between the second bearing seat sleeve 29a, the second bearing seat 23a, the third intermediate flange 25a and the discharging roller 7a.

[0117] Exemplarily, one end of the spiral discharging second bearing seat sleeve 29a close to the second bearing support system is connected with the spiral discharging second bearing seat 23a through the fourth fixing member 44a, and the other end of the spiral discharging second bearing seat sleeve 29a close to the spiral discharging third intermediate flange 25a is connected with the spiral discharging third intermediate flange 25a through the fifth fixing member 45a.

[0118] The first closed cavity and the second closed cavity are respectively connected with the spiral discharging nitrogen pipeline 30a. The spiral discharging nitrogen pipeline 30a is used for supplying nitrogen into the first closed cavity and the second closed cavity. Nitrogen with a pressure of 0.4 Mpa is filled into the first closed cavity and the second closed cavity through the spiral discharging nitrogen pipeline 30a respectively, so as to balance the hydrogen pressure (0.38 Mpa) in the furnace. Since the nitrogen pressure is slightly higher than the hydrogen pressure in the furnace, a small amount of nitrogen will enter the furnace once the packing dynamic sealing system or the car type rotary sealing system leaks or fails, and the nitrogen will push the hydrogen back to avoid hydrogen leakage.

[0119] Exemplarily, the spiral discharging device further comprises a spiral discharging bearing cooling water pipe 46a, which is connected with the spiral discharging first bearing seat 17a, the spiral discharging water inlet pipeline 33a and the spiral discharging water return pipeline 34a respectively, and forms a cooling water circulation between the spiral discharging first bearing seat 17a, the spiral discharging water inlet pipeline 33a and the spiral discharging water return pipeline 34a, so as to cool the first bearing support system.

[0120] Exemplarily, the spiral discharging first bearing seat 17a and the spiral discharging second bearing seat 23a are respectively provided with a spiral discharging oil injection pipeline 47a, which is used for injecting lubricating oil into the self-aligning spherical roller bearing 19a and the spiral discharging tapered roller bearing 48a, so as to lubricate the bearings.

[0121] Exemplarily, the spiral discharging device further comprises a first support seat 49a and a second support seat 50a, the first support seat 49a is used for supporting the discharging roller 7a, and the second support seat 50a is used for supporting the spiral discharging driving device 8a. The bottom of the first support seat 49a and the second support seat 50a can be connected with the shaft furnace through the shaft furnace platform, so as to be fixed.

[0122] Hereinafter, the pure hydrogen shaft furnace bottom discharging system of the present application will be further described through specific embodiments.

[0123] Embodiment 1

[0124] The embodiment provides a pure hydrogen vertical furnace reduction bottom discharging system, a vertical material loosening device 01 is arranged at the center of the pure hydrogen vertical furnace reduction bottom, the vertical material loosening device 01 vertically penetrates the pure hydrogen vertical furnace reduction bottom, six discharging areas are arranged around the vertical material loosening device 01, one discharging port 49 is arranged in each discharging area, and one spiral discharging device 02 is arranged in each discharging port 49; the vertical material loosening device 01 comprises a top cone 1, a material loosening roller 2, a vertical material loosening driving device 3 and a spiral blade 4 which are sequentially arranged from top to bottom, the vertical material loosening driving device 3 is arranged at one end of the material loosening roller 2 located outside the furnace, and the top cone 1 and the spiral blade 4 are arranged at one end of the material loosening roller 2 located inside the furnace; the spiral discharging device 02 penetrates the vertical furnace reduction furnace wall, and the spiral discharging device 02 and the vertical furnace reduction furnace are arranged in a cantilevered mode.

[0125] The discharging area is an annular inner lining wall 15a arranged along the radial direction of the reduction furnace, the part of the spiral discharging device 02 located inside the furnace is horizontally arranged in the inner cavity of the annular inner lining wall 15a, and the discharging port 49 is located below the spiral discharging device 02. The lower part of the discharging port 49 is sequentially connected with a material falling chute 50 and a material falling pipe 51 from top to bottom.

[0126] The loosening roller 2 comprises a vertical loosening outer cylinder 5, a vertical loosening inner cylinder 6 and a combined shaft 7 vertically penetrating the pure hydrogen shaft furnace reduction furnace bottom, the outer periphery of the in-furnace part of the combined shaft 7 is sequentially sleeved with the vertical loosening inner cylinder 6 and the vertical loosening outer cylinder 5 from inside to outside, and the helical blade 4 is arranged on the outer periphery of the vertical loosening outer cylinder 5; the combined shaft 7 comprises a vertical loosening shaft core pipe 703, an inner shaft 702 and an outer shaft 701 which are sequentially sleeved from inside to outside, the pipe inner cavity of the vertical loosening shaft core pipe 703 is communicated with the cavity between the vertical loosening inner cylinder 6 and the vertical loosening outer cylinder 5 through the cavity upper end, the cavity between the vertical loosening inner cylinder 6 and the vertical loosening outer cylinder 5 is communicated with the cavity between the inner shaft 702 and the outer shaft 701 through the cavity lower end, and the combined shaft 7 is provided with a vertical loosening bidirectional rotating water joint 35 at the end away from the shaft furnace, the water inlet cavity of the vertical loosening bidirectional rotating water joint 35 is communicated with the pipe inner cavity of the vertical loosening shaft core pipe 703, the pipe inner cavity of the vertical loosening shaft core pipe 703 is further communicated with the cavity between the vertical loosening inner cylinder 6 and the vertical loosening outer cylinder 5 through the through hole on the upper end of the vertical loosening shaft core pipe 703, the inner shaft upper water passage hole 706 and the inner cylinder upper water passage hole 601, the cavity between the vertical loosening inner cylinder 6 and the vertical loosening outer cylinder 5 is communicated with the cavity between the inner shaft 702 and the outer shaft 701 through the inner cylinder lower water passage hole 602 on the lower end of the vertical loosening inner cylinder 6, and then is communicated with the cavity between the vertical loosening shaft core pipe 703 and the inner shaft 702 through the inner shaft lower water passage hole 707 of the inner shaft 702, and finally is communicated with the water return cavity of the vertical loosening bidirectional rotating water joint 35 through the partition plate water passage hole 709 on the partition plate 708. The vertical loosening device of the pure hydrogen shaft furnace reduction furnace bottom further comprises a vertical loosening water inlet pipeline 33 and a vertical loosening water return pipeline 34, the vertical loosening bidirectional rotating water joint 35 is connected with the combined shaft 7 through the vertical loosening bidirectional rotating water joint flange 36, the vertical loosening water inlet pipeline 33 is communicated with the inner cavity of the vertical loosening shaft core pipe 703 through the vertical loosening bidirectional rotating water joint 35, and the vertical loosening water return pipeline 34 is communicated with the cavity between the vertical loosening shaft core pipe 703 and the inner shaft 702 through the vertical loosening bidirectional rotating water joint 35.

[0127] The outer surface of the vertical loosening inner cylinder 6 is provided with a plurality of helical water grooves extending along the axial direction of the vertical loosening inner cylinder 6, so that the cooling water cavity between the vertical loosening inner cylinder 6 and the vertical loosening outer cylinder 5 is a helical structure water cavity.

[0128] The lower end of the vertical loose material outer cylinder 5 is provided with a tray 8, which is sleeved and welded on the outer periphery of the combined shaft 7, and the lower end of the vertical loose material outer cylinder 5 is welded with the tray 8; the upper end of the vertical loose material outer cylinder 5 is provided with a gland 9, which is welded with the upper end of the vertical loose material outer cylinder 5, and the top cone 1 and the combined shaft 7 are connected with the gland 9. The gland 9 is provided with a shaft head gland 37, and the shaft head gland 37, the gland 9 and the combined shaft 7 are connected through bolts. The shaft head gland 37 and the gland 9 are sealed by a gasket 704. The lower end of the vertical loose material inner cylinder 6 is connected with the tray 8, and the upper end of the vertical loose material inner cylinder 6 is pressed tightly by the gland 9.

[0129] The side of the tray 8 away from the spiral blade 4 is provided with a labyrinth flange 10, and the side of the labyrinth flange 10 away from the tray 8 is provided with a support flange 11, and the support flange 11 and the labyrinth flange 10 are matched to form a multi-channel annular dustproof labyrinth, and the support flange 11 is connected with the pure hydrogen shaft furnace reduction furnace bottom to form a dustproof labyrinth sealing system in the furnace. The lower surface of the labyrinth flange 10 is provided with a labyrinth protrusion, and the upper surface of the support flange 11 is provided with a plurality of annular labyrinth grooves matched with the labyrinth protrusion.

[0130] The connecting part of the combined shaft 7 and the furnace bottom is provided with a vertical loose material packing seal sleeve 12 and a vertical loose material packing seal sleeve gland 13, and the cavity formed between the vertical loose material packing seal sleeve 12, the vertical loose material packing seal sleeve gland 13 and the combined shaft 7 is filled with graphite fiber woven filler 14 to form a packing dynamic sealing system. The vertical loose material packing seal sleeve 12 and the vertical loose material packing seal sleeve gland 13 are connected by bolts.

[0131] The side of the vertical loose material packing seal sleeve gland 13 away from the furnace bottom is provided with a vertical loose material first bearing support system, which includes a vertical loose material first bearing seat 15, and the side of the vertical loose material first bearing seat 15 away from the vertical loose material packing seal sleeve gland 13 is provided with a vertical loose material first bearing seat gland 16, and the cavity formed between the vertical loose material first bearing seat 15, the vertical loose material first bearing seat gland 16 and the combined shaft 7 is provided with a thrust angular contact roller bearing 17 and an angular contact roller bearing 18.

[0132] The side of the vertical loose material first bearing seat gland 16 away from the vertical loose material first bearing seat 15 is provided with a vertical loose material first bearing seal seat 19 and a vertical loose material first bearing seal seat gland 20, and the cavity formed between the vertical loose material first bearing seal seat 19, the vertical loose material first bearing seal seat gland 20 and the combined shaft 7 is provided with a vertical loose material first car type rotary sealing structure 21 to form a first car type rotary sealing system.

[0133] The tray 8 and the outer shaft 701 are detachable structures, and an O-shaped sealing ring 705 is arranged between the tray 8 and the outer shaft 701. A sealing rubber gasket 38 is arranged between the vertical material loosening first bearing sealing seat 19 and the vertical material loosening first bearing seat gland 16.

[0134] The thrust self-aligning roller bearing 17 is arranged on the upper end of the self-aligning roller bearing 18 close to one side of the shaft furnace, a first retainer ring 39 is arranged on the side of the thrust self-aligning roller bearing 17 away from the self-aligning roller bearing 18, and a second retainer ring 40 is arranged between the thrust self-aligning roller bearing 17 and the self-aligning roller bearing 18.

[0135] The vertical material loosening first bearing seat 15 and the support flange 11 are connected through a vertical material loosening first intermediate flange 22, and the vertical material loosening first bearing seat 15 and the vertical material loosening disc packing sealing sleeve 12 are connected to the vertical material loosening first intermediate flange 22.

[0136] A vertical material loosening second bearing support system is arranged on the side of the vertical material loosening first bearing support system away from the furnace bottom, and the vertical material loosening second bearing support system comprises a vertical material loosening second bearing seat 23, an oil seal is arranged between the vertical material loosening second bearing seat 23 and the upper vertical material loosening spacer sleeve 42, an O-shaped sealing ring is arranged between the lower vertical material loosening spacer sleeve 42 and the combined shaft 7, an oil seal and an O-shaped sealing ring are arranged between the vertical material loosening second bearing seat gland 24 and the outer ring of the lower vertical material loosening spacer sleeve 42, the vertical material loosening second bearing seat 23, the vertical material loosening second bearing seat gland 24 and the combined shaft 7 form a cavity, and a vertical material loosening tapered roller bearing 25 is arranged in the cavity.

[0137] The vertical material loosening second bearing seat gland 24 and the vertical material loosening driving device 3 are connected through a vertical material loosening second intermediate flange 26, the vertical material loosening second intermediate flange 26 is arranged on the side of the vertical material loosening driving device 3, a vertical material loosening second intermediate flange gland 27 is arranged on the side of the vertical material loosening second intermediate flange 26 close to the vertical material loosening driving device 3, a vertical material loosening second car type rotary sealing structure 28 is arranged in the cavity formed by the vertical material loosening second intermediate flange 26, the vertical material loosening second intermediate flange gland 27 and the combined shaft 7, and a second car type rotary sealing system is formed.

[0138] The vertical material loosening device 01 further comprises a vertical material loosening first bearing seat sleeve 29 and a vertical material loosening second bearing seat sleeve 30; the vertical material loosening first bearing seat sleeve 29 is sleeved between the first bearing support system and the second bearing support system, one end of the vertical material loosening first bearing seat sleeve 29 close to the first bearing support system is connected with the vertical material loosening first intermediate flange 22, and the other end of the vertical material loosening first bearing seat sleeve 29 away from the first bearing support system is connected with the vertical material loosening second bearing seat 23; a first closed cavity is formed between the vertical material loosening first bearing seat sleeve 29, the vertical material loosening first intermediate flange 22, the vertical material loosening first bearing seat 15, the vertical material loosening second bearing seat 23 and the combined shaft 7; the vertical material loosening second bearing seat sleeve 30 is sleeved between the second bearing support system and the vertical material loosening second intermediate flange 26, one end of the vertical material loosening second bearing seat sleeve 30 close to the second bearing support system is connected with the vertical material loosening second bearing seat 23, and the other end of the vertical material loosening second bearing seat sleeve 30 close to the vertical material loosening second intermediate flange 26 is connected with the vertical material loosening second intermediate flange 26; a second closed cavity is formed between the vertical material loosening second bearing seat sleeve 30, the vertical material loosening second bearing seat 23, the vertical material loosening second intermediate flange 26 and the combined shaft 7; the first closed cavity and the second closed cavity are respectively connected with a vertical material loosening nitrogen pipeline 31, and the vertical material loosening nitrogen pipeline 31 is used for passing nitrogen into the first closed cavity and the second closed cavity to form a nitrogen static pressure sealing system.

[0139] One end of the vertical material loosening first bearing seat sleeve 29 close to the first bearing support system is connected with the vertical material loosening first intermediate flange 22 through a vertical material loosening first fixing piece 43; the other end of the vertical material loosening first bearing seat sleeve 29 away from the first bearing support system is connected with the vertical material loosening second bearing seat 23 through a vertical material loosening second fixing piece 44; one end of the vertical material loosening second bearing seat sleeve 30 close to the second bearing support system is connected with the vertical material loosening second bearing seat 23 through a vertical material loosening third fixing piece 45, and the other end of the vertical material loosening second bearing seat sleeve 30 close to the vertical material loosening second intermediate flange 26 is connected with the vertical material loosening second intermediate flange 26 through a vertical material loosening fourth fixing piece 46.

[0140] Metallic sealing gasket ring 32 is arranged between the support flange 11 and the furnace bottom, the support flange 11 and the vertical material loosening first intermediate flange 22, the vertical material loosening first intermediate flange 22 and the vertical material loosening first bearing seat sleeve pipe 29, the vertical material loosening first intermediate flange 22 and the vertical material loosening first bearing seat 15, the vertical material loosening first bearing seat sleeve pipe 29 and the vertical material loosening second bearing seat 23, the vertical material loosening second bearing seat 23 and the vertical material loosening second bearing seat sleeve pipe 30, and the vertical material loosening second bearing seat sleeve pipe 30 and the vertical material loosening second intermediate flange 26 to form a metallic gasket ring static sealing system.

[0141] The vertical material loosening device further comprises a vertical material loosening bearing cooling water pipe 47 connected with the vertical material loosening first bearing seat 15, the vertical material loosening water inlet pipe 33 and the vertical material loosening water return pipe 34 respectively to form a cooling water circulation between the vertical material loosening first bearing seat 15, the vertical material loosening water inlet pipe 33 and the vertical material loosening water return pipe 34. The vertical material loosening first bearing seat 15 and the vertical material loosening second bearing seat 23 are respectively provided with an oil injection pipe 47.

[0142] The spiral material discharging device comprises a material discharging roller 7a, a spiral material discharging driving device 8a arranged at one end of the material discharging roller 7a, and a spiral blade extending along the outer periphery of the material discharging roller 7a. The spiral blade is arranged at the other end of the material discharging roller 7a. The end of the material discharging roller 7a provided with the spiral blade is located inside the shaft furnace. The material discharging roller 7a is connected to the shaft furnace in a cantilevered manner. The end of the spiral blade close to the spiral material discharging driving device 8a is provided with a support retaining ring 3a. The support retaining ring 3a is sleeved on the material discharging roller 7a and welded to the outer periphery of the material discharging roller 7a. The inside of the support retaining ring 3a is provided with heat-insulating refractory material. The spiral blade and the material discharging roller 7a are connected in a detachable manner.

[0143] The spiral blade comprises a positive spiral blade 1a and a negative spiral blade 2a arranged in sequence from the first shaft head 9a of the material discharging roller 7a located inside the shaft furnace to the inner wall of the shaft furnace. The spiral directions of the positive spiral blade 1a and the negative spiral blade 2a are opposite. The support retaining ring 3a is arranged at the end of the negative spiral blade 2a close to the inner wall of the shaft furnace. The connection between the positive spiral blade 1a and the negative spiral blade 2a is located above the shaft furnace discharge port 49.

[0144] The discharge roller 7a comprises a spiral discharge outer cylinder 4a, a spiral discharge inner cylinder 5a and a spiral discharge shaft tube 6a which are sequentially sleeved from outside to inside, the end of the spiral discharge outer cylinder 4a, the spiral discharge inner cylinder 5a and the spiral discharge shaft tube 6a located in the shaft furnace are welded with the first shaft head 9a, the inner cavity of the spiral discharge shaft tube 6a is communicated with the cavity between the spiral discharge outer cylinder 4a and the spiral discharge inner cylinder 5a through the shaft head water hole 901a on the first shaft head 9a, the cavity between the spiral discharge outer cylinder 4a and the spiral discharge inner cylinder 5a is communicated with the cavity between the spiral discharge inner cylinder 5a and the spiral discharge shaft tube 6a through the inner cylinder water hole 501a on the spiral discharge inner cylinder 5a, and a cooling system is formed.

[0145] The pure hydrogen shaft furnace reduction furnace bottom spiral discharge device further comprises a spiral discharge water inlet pipeline 33a and a spiral discharge water return pipeline 34a, one end of the discharge roller 7a away from the shaft furnace is provided with a spiral discharge bidirectional rotating water joint 35a, the spiral discharge bidirectional rotating water joint 35a is connected with the discharge roller 7a through a spiral discharge bidirectional rotating water joint flange 32a, the water inlet cavity of the spiral discharge bidirectional rotating water joint 35a is communicated with the inner cavity of the spiral discharge shaft tube 6a, the spiral discharge water inlet pipeline 33a is communicated with the inner cavity of the spiral discharge shaft tube 6a through the spiral discharge bidirectional rotating water joint 35a; the water return cavity of the spiral discharge bidirectional rotating water joint 35a is communicated with the cavity between the spiral discharge inner cylinder 5a and the spiral discharge shaft tube 6a, the spiral discharge water return pipeline 34a is communicated with the water return cavity of the spiral discharge bidirectional rotating water joint 35a, the water return cavity of the spiral discharge bidirectional rotating water joint 35a is communicated with the cavity between the spiral discharge inner cylinder 5a and the spiral discharge shaft tube 6a through the partition plate water hole 503a on the partition plate 502a. The partition plate 502a is arranged at one end of the cavity between the spiral discharge inner cylinder 5a and the spiral discharge shaft tube 6a away from the first shaft head 9a.

[0146] The support retaining ring 3a is provided with a spiral discharge packing seal sleeve 10a and a spiral discharge packing seal sleeve gland 11a on the side away from the spiral blade, the cavity formed between the spiral discharge packing seal sleeve 10a, the spiral discharge packing seal sleeve gland 11a and the discharge roller 7a is filled with graphite fiber woven filler 12a, and a packing dynamic sealing system of the spiral discharge device is formed. The spiral discharge packing seal sleeve 10a and the spiral discharge packing seal sleeve gland 11a are connected through bolts.

[0147] The spiral discharge device further comprises an outer tube sleeve 13a, the outer tube sleeve 13a is sleeved at the position of the discharge roller 7a close to the outer wall of the shaft furnace, one end of the outer tube sleeve 13a close to the outer wall of the shaft furnace is welded with the outer wall of the shaft furnace, and the other end of the outer tube sleeve 13a away from the outer wall of the shaft furnace is connected with the spiral discharge packing seal sleeve 10a through a spiral discharge first intermediate flange 14a.

[0148] The first fixing part 36a is welded to the end of the outer tube sleeve 13a away from the outer wall of the shaft furnace, and is connected to the end of the spiral discharging first intermediate flange 14a away from the discharging roller 7a by bolts. The end of the spiral discharging first intermediate flange 14a close to the discharging roller 7a is connected to the spiral discharging packing sleeve 10a by bolts. The first fixing part 36a and the spiral discharging first intermediate flange 14a are provided with a metal gasket ring 37a, and the metal gasket ring 37a is arranged between the spiral discharging first intermediate flange 14a and the spiral discharging packing sleeve 10a.

[0149] An annular inner masonry wall 15a is arranged around the discharging roller 7a along the extension direction of the spiral blade. The cavity formed between the support retaining ring 3a, the annular inner masonry wall 15a of the shaft furnace, the spiral discharging first intermediate flange 14a, the spiral discharging packing sleeve 10a and the discharging roller 7a is provided with fiber cotton 16a, thereby forming a dustproof and heat insulation system.

[0150] A spiral discharging first bearing support system is arranged on the side of the spiral discharging packing sleeve gland 11a away from the shaft furnace. The spiral discharging first bearing support system comprises a spiral discharging first bearing seat 17a. The spiral discharging first bearing seat 17a is connected to the spiral discharging first intermediate flange 14a on the side close to the spiral discharging packing sleeve gland 11a through a spiral discharging second intermediate flange 18a. The spiral discharging first bearing seat 17a is provided with a spiral discharging first bearing seat gland 31a on the side away from the spiral discharging packing sleeve gland 11a. A self-aligning spherical roller bearing 19a is arranged in the cavity formed between the spiral discharging first bearing seat 17a, the spiral discharging first bearing seat gland 31a and the discharging roller 7a. A sealing rubber gasket 38a is arranged between the spiral discharging first bearing seat 17a and the spiral discharging first bearing seat gland 31a.

[0151] The spiral discharging first bearing seat gland 31a is provided with a spiral discharging first bearing sealing seat 20a and a spiral discharging first bearing sealing seat gland 21a on the side away from the spiral discharging first bearing seat 17a. A first car type rotary sealing structure 22 is arranged in the cavity formed between the spiral discharging first bearing sealing seat 20a, the spiral discharging first bearing sealing seat gland 21a and the discharging roller 7a, thereby forming a first car type rotary sealing system of the spiral discharging device. A sealing rubber gasket 38a is arranged between the spiral discharging first bearing sealing seat 20a and the spiral discharging first bearing seat gland 31a.

[0152] The second spiral discharging bearing support system is arranged on the side of the first spiral discharging bearing support system away from the shaft furnace, and comprises a second spiral discharging bearing block 23a, wherein the side of the second spiral discharging bearing block 23a away from the shaft furnace is provided with a second spiral discharging bearing block gland 24a, and a spiral discharging tapered roller bearing 48a is arranged in the cavity formed between the second spiral discharging bearing block 23a, the second spiral discharging bearing block gland 24a and the discharging roller 7a. The spiral discharging tapered roller bearing 48a is two, and an oil ring 39a is arranged between the two spiral discharging tapered roller bearings 48a. A spiral discharging spacer sleeve 40a is arranged between the second spiral discharging bearing block 23a and the discharging roller 7a, between the second spiral discharging bearing block gland 24a and the discharging roller 7a, and between the oil ring 39a and the discharging roller 7a. An O-shaped sealing ring is arranged between the spiral discharging spacer sleeve 40a away from the spiral discharging tapered roller bearing 48a and the discharging roller 7a, and between the spiral discharging spacer sleeve 40a and the second spiral discharging bearing block gland 24a.

[0153] The second spiral discharging bearing block gland 24a and the spiral discharging driving device 8a are provided with a third spiral discharging intermediate flange 25a, the third spiral discharging intermediate flange 25a is connected with the spiral discharging driving device 8a, the side of the third spiral discharging intermediate flange 25a close to the spiral discharging driving device 8a is provided with a third spiral discharging intermediate flange gland 26a, a second vehicle type rotary sealing structure 27a is arranged in the cavity formed between the third spiral discharging intermediate flange 25a, the third spiral discharging intermediate flange gland 26a and the discharging roller 7a, thereby forming a second vehicle type rotary sealing system of the spiral discharging device. An O-shaped sealing ring 41a is arranged between the third spiral discharging intermediate flange 25a and the discharging roller 7a.

[0154] The spiral discharging device further comprises a spiral discharging first bearing seat sleeve pipe 28a and a spiral discharging second bearing seat sleeve pipe 29a; the spiral discharging first bearing seat sleeve pipe 28a is sleeved between the spiral discharging first bearing support system and the spiral discharging second bearing support system, one end of the spiral discharging first bearing seat sleeve pipe 28a close to the first bearing support system is connected with the spiral discharging second intermediate flange 18a and the spiral discharging first intermediate flange 14a, and the other end of the spiral discharging first bearing seat sleeve pipe 28a away from the first bearing support system is connected with the spiral discharging second bearing seat 23a, and the spiral discharging first bearing seat sleeve pipe 28a, the spiral discharging second intermediate flange 18a, the spiral discharging first bearing seat 17a, the spiral discharging second bearing seat 23a and the discharging roller 7a form a first closed cavity; the one end of the spiral discharging first bearing seat sleeve pipe 28a close to the first bearing support system is connected with the spiral discharging second intermediate flange 18a and the spiral discharging first intermediate flange 14a through the second fixing part 42a; the other end of the spiral discharging first bearing seat sleeve pipe 28a away from the first bearing support system is connected with the spiral discharging second bearing seat 23a through the third fixing part 43a; the spiral discharging second bearing seat sleeve pipe 29a is sleeved between the spiral discharging second bearing support system and the spiral discharging third intermediate flange 25a, one end of the spiral discharging second bearing seat sleeve pipe 29a close to the second bearing support system is connected with the spiral discharging second bearing seat 23a, and the other end of the spiral discharging second bearing seat sleeve pipe 29a close to the spiral discharging third intermediate flange 25a is connected with the spiral discharging third intermediate flange 25a, and the spiral discharging second bearing seat sleeve pipe 29a, the spiral discharging second bearing seat 23a, the spiral discharging third intermediate flange 25a and the discharging roller 7a form a second closed cavity; the one end of the spiral discharging second bearing seat sleeve pipe 29a close to the second bearing support system is connected with the spiral discharging second bearing seat 23a through the fourth fixing part 44a, and the other end of the spiral discharging second bearing seat sleeve pipe 29a close to the spiral discharging third intermediate flange 25a is connected with the spiral discharging third intermediate flange 25a through the fifth fixing part 45a; the first closed cavity and the second closed cavity are respectively connected with the spiral discharging nitrogen gas pipeline 30a.

[0155] The spiral discharging device further comprises a spiral discharging bearing cooling water pipe 46a, which is respectively connected with the spiral discharging first bearing seat 17a, the spiral discharging water inlet pipeline 33a and the spiral discharging water return pipeline 34a, and forms a cooling water circulation between the spiral discharging first bearing seat 17a, the spiral discharging water inlet pipeline 33a and the spiral discharging water return pipeline 34a.

[0156] The spiral discharging first bearing seat 17a and the spiral discharging second bearing seat 23a are respectively provided with a spiral discharging oil injection pipeline 47a.

[0157] The spiral discharging device further comprises a first support seat 49a for supporting the discharging roller 7a and a second support seat 50a for supporting the spiral discharging driving device 8a, and the bottoms of the first support seat 49a and the second support seat 50a are connected with the shaft furnace through a shaft furnace platform.

[0158] The pure hydrogen shaft furnace reduction bottom discharging system of the embodiment has no dead material area formed by material accumulation in the shaft furnace bottom during discharging of the shaft furnace bottom.

[0159] Embodiment 2

[0160] The embodiment provides a pure hydrogen shaft furnace reduction bottom discharging system similar to that of Embodiment 1, except that the spiral blades of the spiral discharging device are spiral blades in the same direction.

[0161] The pure hydrogen shaft furnace reduction bottom discharging system of the embodiment has a small amount of material accumulation at the root of the shaft furnace during discharging of the shaft furnace bottom.

[0162] Embodiment 3

[0163] The embodiment provides a pure hydrogen shaft furnace reduction bottom discharging system similar to that of Embodiment 1, except that the end of the spiral blades of the spiral discharging device close to the driving device is not provided with a support blocking ring.

[0164] The pure hydrogen shaft furnace reduction bottom discharging system of the embodiment has high-temperature metallized pellets close to the shaft furnace wall and conduct high-temperature heat to the driving end of the discharging device, burning the driving device during discharging of the shaft furnace bottom.

[0165] Comparative Example 1

[0166] The comparative example provides a pure hydrogen shaft furnace reduction bottom discharging system, which is only provided with a discharging device.

[0167] The pure hydrogen shaft furnace reduction bottom discharging system of the embodiment has material accumulation in the shaft furnace bottom, forming a dead material area during discharging of the shaft furnace bottom.

[0168] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A pure hydrogen shaft reduction furnace bottom discharge system characterized by, The pure hydrogen shaft furnace reduction furnace is provided with a vertical material loosening device (01) in the center of the bottom of the pure hydrogen shaft furnace reduction furnace, the vertical material loosening device (01) vertically penetrates the bottom of the pure hydrogen shaft furnace reduction furnace, a plurality of material discharge areas are arranged around the vertical material loosening device (01), each material discharge area is provided with a material discharge port (49), and each material discharge port (49) is provided with a spiral material discharge device (02); The vertical material loosening device (01) comprises, from top to bottom, a top cone (1), a material loosening roller (2), a vertical material loosening driving device (3) and a spiral blade (4) extending axially along the outer periphery of the material loosening roller (2), the vertical material loosening driving device (3) is arranged at one end of the material loosening roller (2) outside the furnace, and the top cone (1) and the spiral blade (4) are arranged at one end of the material loosening roller (2) inside the furnace. The spiral material discharge device (02) penetrates the shaft furnace reduction furnace wall, and the spiral material discharge device (02) and the shaft furnace reduction furnace are arranged in a cantilevered manner.

2. The pure hydrogen shaft furnace reduction reactor bottom discharge system according to claim 1, characterized in that, The material discharge area is an annular inner masonry wall (15a) arranged along the radial direction of the reduction furnace, the part of the spiral material discharge device (02) inside the furnace is horizontally arranged in the inner cavity of the annular inner masonry wall (15a), and the material discharge port (49) is located below the spiral material discharge device (02).

3. The pure hydrogen shaft furnace reduction reactor bottom discharge system according to claim 1 or 2, characterized in that, The vertical material loosening device (01) is provided with 4-8 material discharge areas.

4. The pure hydrogen shaft furnace reduction reactor bottom discharge system according to claim 1 or 2, characterized in that, The lower part of the material discharge port (49) is sequentially connected with a material falling chute (50) and a material falling pipe (51) from top to bottom.

5. The pure hydrogen shaft furnace reduction reactor bottom discharge system of claim 1, wherein, The material loosening roller (2) comprises an outer cylinder (5), an inner cylinder (6) and a combined shaft (7), the combined shaft (7) vertically penetrates the bottom of the pure hydrogen shaft furnace reduction furnace, the outer periphery of the part of the combined shaft (7) inside the furnace is sequentially sleeved with the inner cylinder (6) and the outer cylinder (5) from inside to outside, and the spiral blade (4) is arranged on the outer periphery of the outer cylinder (5). The combined shaft (7) comprises a shaft core pipe (703), an inner shaft (702) and an outer shaft (701) which are sequentially sleeved from inside to outside, the pipe inner cavity of the shaft core pipe (703) is communicated with the cavity between the inner cylinder (6) and the outer cylinder (5) through the cavity upper end, and the cavity between the inner cylinder (6) and the outer cylinder (5) is communicated with the cavity between the inner shaft (702) and the outer shaft (701) through the cavity lower end.

6. The pure hydrogen shaft furnace reduction reactor bottom discharge system of claim 5, wherein, The connecting part of the combined shaft (7) and the bottom of the furnace is provided with a vertical material loosening packing seal sleeve (12) and a vertical material loosening packing seal sleeve gland (13), and the cavity formed among the vertical material loosening packing seal sleeve (12), the vertical material loosening packing seal sleeve gland (13) and the combined shaft (7) is filled with graphite fiber woven filler (14).

7. The pure hydrogen shaft furnace reduction reactor bottom discharge system of claim 6, wherein, The side, away from the bottom of the furnace, of the vertical material loosening packing seal sleeve gland (13) is provided with a vertical material loosening first bearing support system, and the side, away from the bottom of the furnace, of the vertical material loosening first bearing support system is provided with a vertical material loosening second bearing support system.

8. The pure hydrogen shaft furnace reduction reactor bottom discharge system of claim 1, wherein, The spiral discharging device (02) comprises a discharging roller (7a), a spiral discharging driving device (8a) and a spiral blade extending along the outer periphery of the discharging roller (7a), the spiral discharging driving device (8a) is arranged at one end of the discharging roller (7a), the spiral blade is arranged at the other end of the discharging roller (7a), and the end of the discharging roller (7a) provided with the spiral blade is located inside the shaft furnace, and the discharging roller (7a) is connected to the shaft furnace in a cantilevered manner; The end of the spiral blade close to the spiral discharging driving device (8a) is provided with a supporting baffle ring (3a), the supporting baffle ring (3a) is sleeved on the discharging roller (7a) and is welded with the outer periphery of the discharging roller (7a), and the inside of the supporting baffle ring (3a) is provided with heat-insulating refractory material.

9. The pure hydrogen shaft furnace reduction furnace discharging system according to claim 8, characterized in that, The side of the supporting baffle ring (3a) away from the spiral blade is provided with a spiral discharging packing seal sleeve (10a) and a spiral discharging packing seal sleeve cover (11a), and the cavity formed between the spiral discharging packing seal sleeve (10a), the spiral discharging packing seal sleeve cover (11a) and the discharging roller (7a) is filled with graphite fiber woven filler (12a); The spiral discharging device (02) further comprises an outer sleeve (13a), the outer sleeve (13a) is sleeved on the position of the discharging roller (7a) close to the outer wall of the shaft furnace, one end of the outer sleeve (13a) close to the outer wall of the shaft furnace is welded with the outer wall of the shaft furnace, and the other end of the outer sleeve (13a) away from the outer wall of the shaft furnace is connected with the spiral discharging packing seal sleeve (10a) through a spiral discharging first intermediate flange (14a).

10. The pure hydrogen shaft furnace reduction furnace bottom discharge system according to claim 8 or 9, characterized in that, In the pure hydrogen shaft furnace, an annular inner masonry wall (15a) is arranged around the discharging roller (7a) along the extension direction of the spiral blade, and fiber cotton (16a) is arranged in the cavity formed between the supporting baffle ring (3a), the annular inner masonry wall (15a), the spiral discharging first intermediate flange (14a), the spiral discharging packing seal sleeve (10a) and the discharging roller (7a); A spiral discharging first bearing support system is arranged on the side of the spiral discharging packing seal sleeve cover (11a) away from the shaft furnace, and a spiral discharging second bearing support system is arranged on the side of the spiral discharging first bearing support system away from the shaft furnace.

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