System and method for discharging high-temperature solid materials from vertical furnace to heat-resistant material tank

Abstract

The system comprises the vertical furnace and a surge bin, a first valve, a second valve and a third valve are sequentially arranged at a furnace bottom outlet of the vertical furnace, an outlet of the third valve is connected with the surge bin, and a fourth valve is arranged at an outlet of the surge bin. A sealing component is arranged at an outlet of the fourth valve, a heat-resistant material tank is arranged below the fourth valve, the surge bin is provided with a material level indicator, and electric linkage is arranged between opening and closing control of the second valve, the third valve and the fourth valve and output signals of the material level indicator. The second valve, the third valve and the fourth valve are arranged to be combined with signals of the level gage of the surge bin and are sequentially and orderly opened and closed in a staggered mode, a set of discharging and discharging system is formed in a combined mode, discharging can be conducted smoothly and continuously, and the good sealing effect can be achieved; and meanwhile, nitrogen sealing and nitrogen purging are respectively arranged at the vertical furnace bottom and the surge bin, so that the stable, reliable and safe work of the system is further ensured.

Description

Technical Field

[0001] The present invention belongs to the technical field of high-temperature discharge equipment in industries such as metallurgy and chemical industry, and in particular relates to a system and method for discharging high-temperature solid materials from a vertical furnace to a heat-resistant material tank. Background Art

[0002] In the metallurgical and chemical industries, solid materials are usually heated and heat-treated at high temperatures according to process requirements before entering the subsequent process stages. For example: (1) The "gas-based vertical furnace + electric arc furnace steelmaking process" is a representative of the green and low-carbon process route of the steel industry. First, iron ore is reduced in a gas-based vertical furnace to obtain direct reduced iron (DRI), and then the DRI is transported as a raw material to the downstream electric arc furnace for steelmaking; (2) A new process for producing calcium carbide that uses composite pellets of lime and coal / coke instead of traditional lumpy quicklime blocks and semi-coke blocks as raw materials. First, the composite pellets are subjected to high-temperature pyrolysis or carbonization in a regenerative rotary hearth furnace or a vertical carbonization furnace, and then the heat-treated composite pellet clinker is transported as a raw material to the downstream calcium carbide furnace for calcium carbide production.

[0003] In the above production scenario, no matter what structural form of the heat treatment furnace is used, the high-temperature charge must be discharged and transported to the next process. However, due to the high-temperature characteristics of the material, such as the easy oxidation, spontaneous combustion and even explosion of high-temperature solid materials, the discharge and transportation process is very dangerous, and the requirements for discharge, transportation and other equipment are extremely high; at the same time, the discharge process is often accompanied by the risk of dangerous gases in the furnace (mostly reducing atmospheres containing H2 or CO) escaping from the furnace, which limits the equipment and devices used in the production process. For this reason, the usual solution is to use oil, water, gas and other media to cool the high-temperature materials (below 300°C) and then use conventional mechanical equipment for transportation. The cooling equipment of this solution usually has a large one-time investment and operating cost, and after entering the subsequent production equipment, it needs to be heated again to a high temperature for reaction (above 1500°C), resulting in energy waste.

[0004] Although the direct discharge and transportation process (hot delivery) of high-temperature solid materials (above 600°C) has the above-mentioned difficulties, the benefits of adopting appropriate solutions to achieve hot delivery and hot charging of high-temperature solid materials in the above-mentioned process are more significant: it can not only reduce the energy consumption and cost of the above-mentioned cooling scheme, but also utilize the physical sensible heat carried by the high-temperature solid materials directly into the furnace (hot charging), thereby reducing the power consumption and smelting time of electric furnace production and increasing production load, which is of great significance to energy conservation and consumption reduction and technological innovation in the above-mentioned production fields.

[0005] At present, only a small number of foreign steel mills have adopted gravity direct delivery system, pneumatic conveying system, chain bucket or screw transfer hot delivery system and heat-resistant container tank car delivery system to realize hot delivery and hot charging of DRI to electric furnaces, but there are still many shortcomings: the gravity direct delivery system requires that the discharge port of DRI is higher than the inlet port of the hot charging electric furnace, which greatly increases the height of the vertical furnace foundation, increases the project investment, and restricts the process layout of the electric furnace; the pneumatic conveying system has high power consumption and serious equipment wear; the chain bucket or screw transfer hot delivery system has a complex structure, is easy to get stuck, and has high equipment failure rate and maintenance cost; although the heat-resistant container tank car delivery system avoids the shortcomings of the above methods, during the process of DRI discharging to the heat-resistant material tank, the connection between the heat-resistant material tank and the discharge port of the vertical furnace is not tightly sealed, resulting in the escape of dust and dangerous gases in the furnace; at the same time, since the heat-resistant material tank cannot achieve continuous discharge, valves and other equipment must be repeatedly opened or closed or started and stopped at high temperatures during the discharge process, which puts higher requirements on its stable and reliable operation. Domestic Shenwu Company has developed a new process for producing calcium carbide, which uses a regenerative rotary hearth furnace to pyrolyze quicklime and low-grade coal powder into mixed pellets, which are then hot-transferred to a hot-charged calcium carbide furnace. However, the problem of discharging the mixed pellets into the hot material tank is similar to that of the DRI heat-resistant container tank truck conveying system. Summary of the invention

[0006] In order to solve the problems of dust and dangerous gas escape in the hot delivery and hot loading process of heat-resistant material tanks in the prior art, the purpose of the present invention is to provide a system and method for discharging high-temperature solid materials from a vertical furnace to a heat-resistant material tank, which can achieve stable, reliable and safe operation of the equipment during the discharging process.

[0007] In order to overcome the problems in the prior art, the technical solution adopted by the present invention is as follows: A system for transferring high-temperature solid materials from a vertical furnace to a heat-resistant material tank, comprising a vertical furnace and a buffer bin, wherein a first valve, a second valve and a third valve are sequentially arranged at the bottom outlet of the vertical furnace, the outlet of the third valve is connected to the buffer bin, a fourth valve is arranged at the outlet of the buffer bin, a sealing component is arranged at the outlet of the fourth valve, a heat-resistant material tank is arranged below the fourth valve, a material level meter is arranged at the buffer bin, and an electrical interlock is arranged between the opening and closing control of the second valve, the third valve and the fourth valve and the output signal of the material level meter.

[0008] A further improvement of the present invention is that the first valve is a maintenance or emergency valve, the second valve is a cut-off valve, the third valve is a sealing valve, and the fourth valve is a discharge valve.

[0009] A further improvement of the present invention is that the emergency valve is a high-temperature resistant gate valve, the cut-off valve is a high-temperature resistant semi-ball valve, a jaw unloading valve or a sliding valve, the sealing valve is a high-temperature resistant semi-ball valve or a rotary air-locking valve, and the discharge valve is a high-temperature resistant gate valve or a sealing valve.

[0010] A further improvement of the present invention is that when the third valve is a rotary air-locking valve, the valve plate and part of the transmission shaft of the rotary air-locking valve are arranged in the buffer bin, and a rotary air-locking valve inspection door is arranged on the upper part of the buffer bin.

[0011] A further improvement of the present invention is that a nitrogen sealing pipe is provided at the bottom of the vertical furnace, and a nitrogen sealing regulating valve is provided on the nitrogen sealing pipe.

[0012] A further improvement of the present invention is that a high-temperature expansion joint is provided between the first valve and the second valve, or between the second valve and the third valve, or between the third valve and the buffer bin.

[0013] A further improvement of the present invention is that a nitrogen purge inlet valve and a nitrogen purge outlet valve are provided on the buffer bin.

[0014] A further improvement of the present invention is that a negative pressure dust collecting hood is provided at the fourth valve outlet.

[0015] A further improvement of the present invention is that the second valve and the fourth valve are provided with a water cooling structure.

[0016] A method for discharging high-temperature solid materials from a vertical furnace to a heat-resistant material tank comprises the following steps: The first valve is in the open state, and the second valve, the third valve, the fourth valve, the buffer bin nitrogen purge inlet valve and the outlet valve are in the closed state; the nitrogen sealing regulating valve is in the open state; Open the nitrogen purge inlet valve and outlet valve of the buffer bin, replace the inert atmosphere in the buffer bin, then close the inlet valve and outlet valve, and then open the third valve. After the third valve is fully opened, open the second valve to discharge the high-temperature solid material in the bottom of the vertical furnace into the buffer bin under the action of gravity. When the material level meter detects that the material level in the buffer bin reaches the set material level, close the second valve. After the second valve is fully closed, close the third valve. After the feed port of the heat-resistant material tank is connected to the sealing component, open the feed valve and the fourth valve of the heat-resistant material tank in turn. After several seconds, when the level meter detects the buffer bin empty signal, close the fourth valve and the feed valve in turn to complete the discharge operation.

[0017] Compared with the prior art, the present invention has the following beneficial effects: In the present invention, the second valve, the third valve, and the fourth valve are combined with the signal of the level meter of the buffer bin, and are opened and closed in sequence and orderly, so as to form a set of discharge and discharge system, which can not only discharge the materials smoothly and continuously, but also have a good sealing effect; in the present invention, the second valve and the third valve at the inlet of the buffer bin are used in combination, and the second valve is mainly responsible for cutting the material, and the performance requirements are not high, while the third valve is mainly responsible for locking the air, and due to the existence of the second valve, the direct contact between the third valve and the high-temperature solid material is avoided. In addition, the buffer bin is provided with a level meter, and its level signal is interlocked to control the inlet and outlet valves of the buffer bin, so that the volume of the high-temperature solid material discharged into the buffer bin from the top meets the storage requirements of the heat-resistant material tank at the bottom, and it is avoided that too much high-temperature solid material in the buffer bin affects the closing of the third valve or directly contacts with the high-temperature solid material to affect its service life, thereby ensuring that the entire device can work stably and reliably.

[0018] Furthermore, the system of the present invention solves the problems of dust and dangerous gas escape in the existing discharging system and unstable production due to pressure fluctuation in the furnace by arranging a nitrogen sealing regulating valve and a nitrogen purge outlet valve, and organically combining them with the opening and closing of the second valve, the third valve, and the fourth valve. It also effectively prevents the dangers of oxidation, spontaneous combustion, explosion, etc. of high-temperature solid materials caused by the intrusion of air during the discharging process, thereby ensuring the operational safety of the discharging process. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] All drawings and reference numerals in the drawings involved in the present invention are described as follows: Figure 1 It is a structural schematic diagram of embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the structure of Embodiment 2 of the present invention; Figure markings: 100-vertical furnace, 101-discharge pipe, 102-first valve, 103-second valve, 104-high temperature expansion joint, 105-third valve, 106-buffer bin, 107-level meter, 108-fourth valve, 109-sealing component, 110-heat-resistant material tank, 111-nitrogen sealing pipe, 112-nitrogen sealing regulating valve, 113-nitrogen purge outlet pipe, 114-nitrogen purge outlet valve, 115-nitrogen purge inlet pipe, 116-nitrogen purge inlet valve, 117-feed valve, 118-dust hood, 200-rotary air closing valve inspection door. DETAILED DESCRIPTION

[0020] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly and comprehensively understood.

[0021] In addition, when an element in the present invention is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0022] Example 1 like Figure 1 As shown, the system of this embodiment for discharging high-temperature solid materials from a vertical furnace to a heat-resistant material tank includes a vertical furnace 100 and a buffer bin 106. The bottom outlet of the vertical furnace 100 is provided with a first valve 102, a second valve 103 and a third valve 105 in sequence. The outlet of the third valve 105 is connected to the buffer bin 106. The outlet of the buffer bin 106 is provided with a fourth valve 108 and a sealing component 109 is provided at the outlet of the fourth valve 108.

[0023] The first valve 102 is a valve for maintenance or accidents, which is kept normally open during the production process and closed when the lower equipment is under maintenance or an emergency occurs during the production process. It is preferably a high-temperature resistant gate valve, such as a gate valve.

[0024] The second valve 103 is a cut-off valve, which is in direct contact with the high-temperature material in the discharge pipe and directly bears the weight of the high-temperature material. The valve is required to have certain high-temperature anti-deformation and wear resistance, and is preferably a high-temperature resistant hemispherical valve, a jaw discharge valve or a sliding valve.

[0025] The third valve 105 is a gas lock valve, which is used to effectively prevent the diffusion of reducing gas in the furnace to the buffer bin. It is preferably a high-temperature resistant hemispherical valve or a rotary air-locking valve. The third valve 105 does not directly contact the high-temperature material in the discharge pipe, that is, the third valve 105 is opened first and then the second valve 103 during the discharge process. After the discharge is completed, the second valve 103 is closed first and then the third valve 105 is closed. When the third valve 105 is a rotary air-locking valve, the buffer bin 106 can be used as its valve box, that is, the rotary air-locking valve valve box is omitted, and the necessary components such as the valve plate and part of the transmission shaft of the rotary air-locking valve are directly placed in the buffer bin 106; at this time, a rotary air-locking valve inspection door 200 should be provided on the upper part of the buffer bin 106.

[0026] The fourth valve 108 is a discharge valve, which is used to control the discharge of high-temperature materials in the buffer bin 106 into the heat-resistant material tank 110, and also has an air-locking and sealing function to reduce the escape of dust and gas in the buffer bin to the outside. It is preferably a high-temperature resistant gate valve or a sealing valve.

[0027] The sealing component at the outlet of the fourth valve 108 must be compatible with the sealing component at the inlet of the heat-resistant material tank 110 and is preferably a conical sealing component; The opening and closing control of the second valve 103 , the third valve 105 and the fourth valve 108 are electrically interlocked with the output signal of the material level meter 107 .

[0028] Preferably, the first valve 102 described in this embodiment is a manual gate valve, the second valve 103 is a high temperature resistant jaw unloading valve, the third valve 105 is a high temperature resistant hemispherical valve, the fourth valve 108 is a high temperature resistant sealing valve, and the sealing component 109 is a conical sealing component; of course, in different implementations, the above-mentioned valves and sealing components may also adopt other forms of valves and sealing components.

[0029] The system of this embodiment for discharging high-temperature solid materials from a vertical furnace to a heat-resistant material tank also includes a nitrogen sealing pipe 111 arranged at the bottom of the vertical furnace 100 or on the discharge pipe 101 arranged above the first valve 102, which is used to prevent the reducing gas in the furnace from leaking to the buffer bin at the lower part during the discharge process; a nitrogen sealing regulating valve 112 arranged on the nitrogen sealing pipe 111; a high-temperature expansion joint 104 arranged between the second valve 103 and the third valve 105; a level meter 107 arranged on the upper part of the buffer bin 106, a nitrogen purge inlet pipe 115 and a nitrogen purge inlet valve 116 arranged at the lower part of the buffer bin 106, and a nitrogen purge outlet pipe 113 and a nitrogen purge outlet valve 114 arranged at the upper part of the buffer bin 106.

[0030] The material level meter 107 is used to monitor the material level of the buffer bin 106, so that the volume of high-temperature solid material discharged from the upper cut-off valve into the buffer bin 106 meets the storage requirements of the bottom heat-resistant material tank, and avoids excessive high-temperature solid material in the buffer bin affecting the closing of the third valve or direct contact with the high-temperature solid material to affect its service life; the material level meter 107 must also send a material level signal to control the switch or start and stop of the discharge device.

[0031] The nitrogen purge inlet pipe 115 takes in air from the lower part of the buffer bin 106 and exhausts air from the upper part of the buffer bin 106, and a buffer bin nitrogen purge inlet valve 116 and a buffer bin nitrogen purge outlet valve 114 are respectively provided on the nitrogen purge inlet pipe 115 and the nitrogen purge outlet pipe 113.

[0032] The detailed working process of the method of discharging high-temperature solid materials from a vertical furnace to a heat-resistant material tank based on the above system in this embodiment, i.e., intermittent operation, is as follows: (1) In the first stage, i.e., the non-discharging and discharging stage, the first valve is in an open state, and the second valve 103, the third valve 105, the fourth valve 108, the buffer nitrogen purge inlet valve 116 and the nitrogen purge outlet valve 114 are in a closed state; the nitrogen sealing regulating valve 112 is in an open state, and its opening is adjusted to make the sealing nitrogen flow rate to an appropriate flow rate, which neither affects the furnace bottom pressure nor reduces the escape of dangerous gas from the outlet of the fourth valve; (2) The second stage, i.e., the stage of discharging the material into the buffer bin: on the basis of the first stage, the nitrogen purge inlet valve 116 and the nitrogen purge outlet valve 114 of the buffer bin are opened. After purging for several seconds, the buffer bin is replaced with an inert atmosphere, and then the inlet valve 116 and the nitrogen purge outlet valve 114 are closed. Then, the third valve 105 is opened. After the third valve 105 is fully opened, i.e., after the third valve fully opened signal is detected, the second valve 103 is opened to discharge the high-temperature solid material in the bottom of the vertical furnace 100 into the buffer bin 106 under the action of gravity. After discharging for several seconds, when the material level meter 107 detects that the material level in the buffer bin 106 reaches the set material level, the second valve 103 is immediately closed. After the second valve 103 is fully closed signal is detected, the third valve 105 is closed to complete the discharging operation. (3) The third stage, i.e., the stage of discharging materials to the heat-resistant material tank: After the second stage is completed and the heat-resistant material tank 110 is in place and docked with the conical sealing member 109, that is, after the signal that the heat-resistant material tank is in place is detected and the fourth valve outlet sealing member is docked, the feed valve 117 and the fourth valve 108 of the heat-resistant material tank 110 are opened in sequence. After several seconds, after the level meter 107 detects the empty signal of the buffer bin 106, the fourth valve 108 and the feed valve 117 are closed in sequence to complete the discharging operation. After the fourth valve is closed in place signal is detected, the heat-resistant material tank can be removed and sent to the downstream process. (4) Return to the first stage, and then complete the material placement and discharge cycle according to the above process.

[0033] During the normal operation of the above-mentioned discharge and discharge cycle, the first valve 102 is always in an open state, and in the event of maintenance work or emergency, the first valve 102 can be temporarily closed.

[0034] As an improvement of this embodiment, a negative pressure dust collecting hood 118 is arranged around the outlet of the fourth valve 108, which is used to handle a small amount of dust and gas emitted from near the outlet of the fourth valve 108 during the operation of the discharge device, including dust and gas emitted when the fourth valve 108 discharges material into the heat-resistant material tank and when the buffer tank is purged with nitrogen.

[0035] As an improvement of this embodiment, the second valve 103 and the fourth valve 108 are further provided with a water cooling structure to ensure that the valves can rotate flexibly without getting stuck under continuous high temperature conditions.

[0036] As an improvement of this embodiment, the outer walls of equipment such as the vertical furnace 100, the discharge pipe 101, the buffer bin 106 and the heat-resistant material tank 110 are made of refractory castables, insulation boards and iron shells to ensure the stability of the device structure under high temperature, isolate the material from high temperature and reduce heat loss.

[0037] Example 2 like Figure 2 As shown, the second valve 103 is a high-temperature resistant ball valve, the third valve 105 is a rotary air-locking valve, and the fourth valve 108 is a high-temperature resistant electric gate valve; a high-temperature expansion joint 104 is arranged between the first valve 102 and the second valve 103; the valve plate and part of the transmission shaft and other necessary components of the rotary air-locking valve of the third valve 105 are directly placed in the buffer bin 106, and a rotary air-locking valve inspection door 200 is arranged on the upper part of the buffer bin 106; the other structures of the system for transferring high-temperature solid materials from a vertical grate discharge to a heat-resistant material tank in this embodiment are the same as those in Example 1, and its working process is also the same as that in Example 1.

[0038] As an improvement to the present embodiment, after the buffer bin 106 is nitrogen purged in the second stage, the nitrogen purging inlet valve 116 of the buffer bin is kept open, and the nitrogen purging outlet valve 114 is closed to increase the pressure in the buffer bin to a level close to the pressure in the discharge pipe 101 at the bottom of the vertical furnace 100 or the top of the first valve 102 before discharging is carried out to avoid large pressure fluctuations in the furnace during the discharging process; after the discharging is completed, the nitrogen purging inlet valve 116 and the nitrogen purging outlet valve 114 of the buffer bin 106 are closed before proceeding to the next stage.

[0039] Example 3 The difference from Example 1 is that a high-temperature expansion joint is no longer arranged between the second valve 105 and the third valve 106, but a high-temperature expansion joint is arranged between the third valve 105 and the buffer bin 106 to adapt to the size or displacement changes of the discharge device due to thermal expansion and contraction.

[0040] The other structures of the system for discharging high-temperature solid materials from a vertical furnace to a heat-resistant material tank in this embodiment are the same as those in Embodiment 1, and its working process is also the same as that in Embodiment 1.

[0041] The system of the present invention adopts four valves, especially the second valve, the third valve, and the fourth valve, which are combined with the signal of the material level meter of the buffer bin, and are opened and closed in an orderly and staggered manner in sequence to form a set of discharge and discharge system, which can not only discharge materials smoothly and continuously, but also have a good sealing effect; The four valves of the system of the present invention each have their own functions, especially the combination of the second valve and the third valve at the inlet of the buffer bin. The second valve is mainly responsible for cutting off the material, and its performance requirement is not high; while the third valve is mainly responsible for locking the air, and due to the existence of the second valve, the third valve is prevented from directly contacting with the high-temperature solid material, and its high-temperature durability is greatly guaranteed, so that the entire device can work stably and reliably; The system of the present invention solves the problems of dust and dangerous gas escape in the furnace and unstable production due to pressure fluctuation in the furnace in the existing discharging system by arranging a nitrogen sealing regulating valve and a nitrogen purge outlet valve, and organically combining the opening and closing of the second valve, the third valve and the fourth valve, and effectively prevents the dangers of oxidation, spontaneous combustion and explosion of high-temperature solid materials caused by the intrusion of air during the discharging process, thereby ensuring the operational safety of the discharging process.

[0042] The above description is only for the best embodiment of the present invention, but it should not be understood as limiting the claims. The present invention is not limited to the above embodiments, and its specific structure is allowed to be changed. However, all changes made within the protection scope of the independent claims of the present invention are within the protection scope of the present invention.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

Claims

1. A system for transferring high-temperature solid materials from a vertical furnace to a heat-resistant material tank, characterized in that: The invention comprises a vertical furnace (100) and a buffer bin (106); a first valve (102), a second valve (103) and a third valve (105) are arranged at the bottom outlet of the vertical furnace (100) in sequence; the outlet of the third valve (105) is connected to the buffer bin (106); a fourth valve (108) is arranged at the outlet of the buffer bin (106); a sealing component (109) is arranged at the outlet of the fourth valve (108); a heat-resistant material tank (110) is arranged below the fourth valve (108); a material level meter (107) is arranged at the buffer bin (106); and an electrical interlock is arranged between the opening and closing control of the second valve (103), the third valve (105) and the fourth valve (108) and the output signal of the material level meter (107).

2. The system for discharging high-temperature solid materials from a vertical furnace to a heat-resistant material tank according to claim 1, characterized in that: The first valve (102) is a valve for maintenance or emergency use, the second valve (103) is a material cut-off valve, the third valve (105) is a sealing valve, and the fourth valve is a material discharge valve.

3. The system for discharging high-temperature solid materials from a vertical furnace to a heat-resistant material tank according to claim 2, characterized in that: The emergency valve is a high temperature resistant gate valve, the cut-off valve is a high temperature resistant semi-ball valve, a jaw discharge valve or a sliding valve, the sealing valve is a high temperature resistant semi-ball valve or a rotary air-locking valve, and the discharge valve is a high temperature resistant gate valve or a sealing valve.

4. The system for discharging high-temperature solid materials from a vertical furnace to a heat-resistant material tank according to claim 1 or 3, characterized in that: When the third valve (105) is a rotary air-locking valve, a valve plate and a portion of a transmission shaft of the rotary air-locking valve are arranged in a buffer bin (106), and a rotary air-locking valve inspection door (200) is arranged on the upper portion of the buffer bin (106).

5. The system for discharging high-temperature solid materials from a vertical furnace to a heat-resistant material tank according to claim 1, characterized in that: A nitrogen sealing pipe (111) is provided at the bottom of the vertical furnace (100), and a nitrogen sealing regulating valve (112) is provided on the nitrogen sealing pipe (111).

6. The system for discharging high-temperature solid materials from a vertical furnace to a heat-resistant material tank according to claim 1, characterized in that: A high-temperature expansion joint (104) is provided between the first valve (102) and the second valve (103), or a high-temperature expansion joint (104) is provided between the second valve (103) and the third valve (105), or a high-temperature expansion joint (104) is provided between the third valve (105) and the buffer bin (106).

7. The system for discharging high-temperature solid materials from a vertical furnace to a heat-resistant material tank according to claim 1, characterized in that: The buffer bin (6) is provided with a nitrogen purge inlet valve (116) and a nitrogen purge outlet valve (114).

8. The system for discharging high-temperature solid materials from a vertical furnace to a heat-resistant material tank according to claim 1, characterized in that: A negative pressure dust collecting hood (118) is provided at the outlet of the fourth valve (108).

9. The system for discharging high-temperature solid materials from a vertical furnace to a heat-resistant material tank according to claim 1, characterized in that: The second valve (103) and the fourth valve (108) are provided with a water cooling structure.

10. A method for discharging high-temperature solid materials from a vertical furnace to a heat-resistant material tank based on the system according to any one of claims 1 to 9, characterized in that: The following steps are involved: (1) The first valve (102) is in an open state, and the second valve (103), the third valve (105), the fourth valve (108), the buffer bin nitrogen purge inlet valve (116) and the outlet valve (114) are in a closed state; the nitrogen sealing regulating valve (112) is in an open state; (2) opening the nitrogen purge inlet valve (116) and outlet valve (114) of the buffer bin, replacing the buffer bin (106) with an inert atmosphere, and then closing the inlet valve (116) and outlet valve (114), and then opening the third valve (105). After the third valve (105) is fully opened, the second valve (103) is opened to discharge the high-temperature solid material in the bottom of the vertical furnace (100) into the buffer bin (106) under the action of gravity. When the material level meter (107) detects that the material level in the buffer bin (106) reaches the set material level, the second valve (103) is closed. After the second valve (103) is fully closed, the third valve (105) is closed. (3) After the feed port of the heat-resistant material tank (110) is connected to the sealing component (109), the feed valve (117) and the fourth valve (108) of the heat-resistant material tank are opened in sequence. After several seconds, when the level meter (107) detects an empty signal from the buffer bin (106), the fourth valve (108) and the feed valve (117) are closed in sequence to complete the discharge operation.

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