A safety control system and control method for a hydrogen reduction furnace

Abstract

The present invention relates to the field of reduction furnace safety control technology, specifically to a hydrogen reduction furnace safety control system and control method, including a reduction furnace; a barrier protection mechanism for forming a high-speed airflow protection barrier; a feed protection mechanism for protecting the feed of raw materials; and a waste gas treatment mechanism for treating waste gas; the barrier protection mechanism is connected above the reduction furnace, the feed protection mechanism is connected above the barrier protection mechanism, and the waste gas treatment mechanism is arranged on the barrier protection mechanism and the feed protection mechanism. The protective tank and the high-speed protective gas airflow formed at the top and bottom of the protective tank can form a gas barrier, thereby isolating the hydrogen to prevent the hydrogen from drifting upward and diffusing into the air during feeding to create safety hazards. At the same time, the protective gas can be discharged from the feed pipe to the outside during the feeding process, generating a continuous outward airflow to reduce or prevent air from entering with the raw materials, thereby improving the safety performance of the reduction furnace.

Description

Technical Field

[0001] The present invention relates to the technical field of reduction furnace safety control, and in particular to a hydrogen reduction furnace safety control system and control method. Background Art

[0002] Hydrogen reduction furnace is an important heat treatment equipment, widely used in metallurgy, chemical industry, building materials and electronic industry. Hydrogen reduction furnace refers to a device that reduces metals, ceramics and other materials by heating hydrogen. Its principle is to use the strong reducing property of hydrogen at high temperature to reduce metal ions or other ions to pure metals or alloys. Specifically, under high temperature conditions, hydrogen reacts with metal oxides or other compounds to generate the required metal or compound and water vapor.

[0003] However, hydrogen, as a reaction gas, has certain safety risks. During the process of feeding raw materials from the top of the reduction furnace, a large amount of hydrogen will leak through the raw materials into the air, and the air will also settle from the feed port and flow into the reduction furnace. When the hydrogen concentration near the feed port is greater than 4.1% or the hydrogen concentration in the reduction furnace is less than 74.8%, there will be an explosion hazard. In view of this, we propose a safety control system and control method for a hydrogen reduction furnace. Summary of the invention

[0004] The purpose of the present invention is to provide a hydrogen reduction furnace safety control system and control method, which solves the problem in the prior art that hydrogen in the reduction furnace leaks into the outside air when the reduction furnace is fed or the outside air enters the reduction furnace with the raw materials, causing safety hazards.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A hydrogen reduction furnace safety control system comprises a reduction furnace;

[0007] A barrier protection mechanism for forming a high-speed airflow protection barrier;

[0008] A feed protection mechanism, used to protect the feed of raw materials;

[0009] An exhaust gas treatment mechanism for treating exhaust gas;

[0010] The barrier protection mechanism is connected above the reduction furnace, the feed protection mechanism is connected above the barrier protection mechanism, and the exhaust gas treatment mechanism is arranged on the barrier protection mechanism and the feed protection mechanism;

[0011] The barrier protection mechanism comprises a protection tank, which is fixedly connected to the top of the reduction furnace, wherein the top of the protection tank is fixedly connected to an air intake pipe 1 and an exhaust pipe 1, and the bottom of the protection tank is fixedly connected to an air intake pipe 2 and an exhaust pipe 2;

[0012] A boost pump is fixedly connected to the side of the protection tank, the boost pump is fixedly connected to the first intake pipe, the bottom of the protection tank is fixedly connected to a protection pipe, and the second intake pipe and the second exhaust pipe are symmetrically connected to both sides of the end of the protection pipe.

[0013] Preferably, the feed protection mechanism includes a raw material tank, a feed pipe is fixedly connected to the top of the raw material tank, a control valve 2 is connected to the feed pipe, an exhaust hood is fixedly connected to one end of the exhaust pipe, the exhaust hood is fixedly connected to the outside of the raw material tank, and a reflux pipe is fixedly connected to the top of the exhaust hood.

[0014] Preferably, a connecting pipe is fixedly connected to the bottom end of the raw material tank, the raw material tank is connected to the protective tank through the connecting pipe, a control valve 1 is connected to the connecting pipe, and the air inlet pipe 1 and the exhaust pipe 1 are symmetrically connected on both sides of the end of the connecting pipe.

[0015] Preferably, a recovery pipe is fixedly connected to the side of the raw material tank, the recovery pipe is interconnected with the inside of the raw material tank, the ends of the recovery pipe and the reflux pipe are fixedly connected to an air pump, and the output end of the air pump is interconnected with the second air inlet pipe.

[0016] Preferably, the recovery pipe is fixedly connected to an exhaust pipe, and a three-way valve is connected to the connection between the exhaust pipe and the recovery pipe.

[0017] Preferably, the exhaust gas treatment mechanism includes a separation tank, which is fixedly connected to the end of the return pipe, and the two ends of the exhaust pipe and the end of the recovery pipe are fixedly connected to the side of the separation tank. A dehumidification block is movably connected inside the separation tank, and the dehumidification block is connected to the end of the return pipe, the recovery pipe and the two ends of the exhaust pipe.

[0018] Preferably, a processing pipe is fixedly connected to the top end of the separation tank, and the air pump is communicated with the bottom end of the separation tank through a pipeline.

[0019] A hydrogen reduction furnace safety control method, comprising:

[0020] Gas barrier protection of the protective tank; protective gas is introduced into the air inlet pipe through a booster pump and a high-speed airflow is formed at the end of the connecting pipe, and a gas barrier is formed through the airflow to provide preliminary protection against the escape and leakage of hydrogen;

[0021] Feed gas discharge protection of the raw material tank: reduce the flow rate of the protective gas through the exhaust hood and pass it into the raw material tank. At the same time, close the recovery pipe and the connecting pipe respectively during feeding, so that the protective gas is discharged from the feed pipe to the outside;

[0022] After the feeding operation is completed, the feeding pipe is closed and the recovery pipe is opened to discharge the air in the raw material tank;

[0023] After the air treatment operation is completed, the connecting pipe is opened to move the raw materials from the raw material tank to the reduction furnace;

[0024] During the feeding protection process, the three-way valve is opened, and the waste gas in the raw material tank flows from the recovery pipe through the three-way valve and is discharged through the waste gas pipe;

[0025] Reuse of reflux gas; after the waste gas is continuously discharged for a set time through the waste gas pipe, the three-way valve turns to make the waste gas in the raw material tank flow from the recovery pipe through the three-way valve to the separation tank;

[0026] The reflux pipe returns the gas at the top of the exhaust hood to the separation tank, and a small amount of hydrogen is separated from the protective gas, and the protective gas flows to the air pump;

[0027] Turn on the air pump, which draws air from the bottom of the separation tank and pumps the separated protective gas out from the second air inlet pipe.

[0028] Preferably, the protective gas is a combination of one or more of nitrogen and rare gases.

[0029] By means of the above technical solution, the present invention provides a hydrogen reduction furnace safety control system and control method having at least the following beneficial effects:

[0030] (1) The present invention forms a gas barrier by providing a protective tank and forming a high-speed protective gas flow at the top and bottom of the protective tank, thereby isolating the hydrogen and preventing the hydrogen from drifting upward and diffusing into the air during feeding to create a safety hazard. At the same time, the protective gas can be discharged from the feed pipe to the outside during the feeding process, thereby generating a continuous outward airflow to reduce or prevent air from entering with the raw materials, thereby improving the safety performance of the reduction furnace.

[0031] (2) The exhaust hood structure of the present invention, which is provided with a diverter structure, can reduce the flow rate of the protective gas through the trumpet-shaped structure, so that the reflux pipe at the top of the exhaust hood allows the hydrogen-protective gas mixture or the protective gas to flow back into the separation tank, and the hydrogen, water vapor and protective gas in the mixed gas are separated by the separation tank, so that the protective gas can be reused, and an additional gas barrier can be formed inside the protective tank to improve the safety protection performance.

[0032] (3) The waste gas pipe structure of the present invention can discharge the gas in the raw material tank. After the raw material tank is closed by control valve 1 and control valve 2, the gas in the raw material tank can be discharged through the waste gas pipe, thereby removing the residual air in the raw material tank, thereby preventing the outside air from entering the reduction furnace along with the raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application:

[0034] Figure 1 It is a structural schematic diagram of the present invention.

[0035] Figure 2 It is a front view schematic diagram of the present invention.

[0036] Figure 3 It is a schematic diagram of the internal structure of the exhaust hood of the present invention.

[0037] Figure 4 It is a schematic diagram of the internal structure of the separation tank of the present invention.

[0038] In the figure: 1. reduction furnace; 2. barrier protection mechanism; 21. protection tank; 22. intake pipe 1; 23. exhaust pipe 1; 24. intake pipe 2; 25. exhaust pipe 2; 26. booster pump; 27. connecting pipe; 28. control valve 1; 3. feed protection mechanism; 31. raw material tank; 32. feed pipe; 33. control valve 2; 34. exhaust hood; 35. reflux pipe; 36. recovery pipe; 37. air pump; 38. exhaust pipe; 39. three-way valve; 4. exhaust gas treatment mechanism; 41. separation tank; 42. dehumidification block; 43. treatment pipe. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0040] A hydrogen reduction furnace safety control system, such as Figure 1-Figure 4 As shown, it includes a reduction furnace 1, and a barrier protection mechanism 2 is provided on the top of the reduction furnace 1. The barrier protection mechanism 2 can form a gas barrier above the reduction furnace 1 through a high-speed inert gas flow, thereby isolating the gas escaping from the reduction furnace 1 for barrier protection, thereby preventing the hydrogen inside the reduction furnace 1 from leaking into the air to cause safety hazards.

[0041] Specifically, a protective tube is fixedly connected to the top of the reduction furnace 1, and the barrier protection mechanism 2 includes a protective tank 21, which is fixedly connected to the top of the protective tube. The protective tank 21 can protect the reduction furnace 1, so that the hydrogen inside the reduction furnace 1 can be initially isolated through the protective tank 21 when it leaks. A connecting pipe 27 is fixedly connected to the top of the protective tank 21, and an intake pipe 22 and an exhaust pipe 23 are arranged on both sides of the bottom of the connecting pipe 27. The distance between the intake pipe 22 and the exhaust pipe 23 is relatively close. When the intake pipe 22 discharges a high-speed protective gas flow into the protective tank 21, the protective gas can be discharged from the exhaust pipe 23 to the outside, and a gas barrier is formed between the pipe openings of the intake pipe 22 and the exhaust pipe 23, thereby isolating the protective tank 21 from the connecting pipe 27. The air inlet pipe 22 and the exhaust pipe 23 are fixedly connected to the top of the protective tank 21. The end of the air inlet pipe 22 is connected to a booster pump 26. The booster pump 26 structure can allow the protective gas to enter through the air inlet end and increase the gas pressure through the booster pump 26 to increase the air flow rate. Example

[0042] like Figure 1-Figure 4 As shown, a feed protection mechanism 3 is provided on the top of the protection tank 21. The feed protection mechanism 3 can protect the gas when the raw material is fed, thereby preventing the hydrogen inside the reduction furnace 1 from leaking and preventing the outside air from entering the reduction furnace 1 along with the raw material.

[0043] In this embodiment, the feed protection mechanism 3 includes an exhaust hood 34, the end of which is fixedly connected to the exhaust pipe 23. The exhaust hood 34 is a trumpet-shaped structure. The exhaust hood 34 with a gradually increasing inner diameter can gradually slow down the flow rate of the gas discharged from the exhaust pipe 23. The end of the exhaust hood 34 is fixedly connected to the raw material tank 31. The exhaust hood 34 can reduce the flow rate of the gas inside the exhaust pipe 23 and guide it to the inside of the raw material tank 31. The raw material tank 31 is fixedly connected to the top of the connecting pipe 27. The connecting pipe 27 is fixedly connected to a control valve 28. The control valve 28 can control the opening and closing of the connecting pipe 27, thereby controlling the feed isolation of the raw material. The end of the raw material tank 31 away from the exhaust hood 34 is fixedly connected to a recovery pipe 36. The recovery pipe 36 structure can recover the protective gas flowing into the raw material tank 31, thereby reusing the protective gas. A feed pipe 32 is fixedly connected to the top of the raw material tank 31, and a control valve 2 33 is fixedly connected to the feed pipe 32. The feed pipe 32 can feed the raw materials, and the control valve 2 33 can control the opening and closing of the feed pipe 32, so as to keep the raw material tank 31 closed after the raw material feeding operation is completed. At the same time, the feed pipe 32 structure can control the discharge of protective gas to the outside during feeding, so as to reduce the amount of air entering with the raw materials. Example

[0044] like Figure 1-Figure 4As shown, the end of the reflux pipe 35 is connected to a waste gas treatment mechanism 4, which can treat the refluxed waste gas to separate the protective gas from a small amount of escaped hydrogen and the water vapor rising in the reduction furnace 1, so that the protective gas can be reused to improve the utilization rate of the protective gas.

[0045] In this embodiment, a reflux pipe 35 is fixedly connected to the top of the exhaust hood 34. The reflux pipe 35 can reflux the gas in the upper layer of the exhaust hood 34 for reuse. The gas below the exhaust hood 34 flows into the raw material tank 31 and processes the raw materials. The connecting hole between the raw material tank 31 and the exhaust hood 34 is located at the lower side. After being discharged from the exhaust pipe 1 23, the gas directly impacts the outer wall of the raw material tank 31 and diffuses to the entire exhaust hood 34, so that part of the protective gas can flow from the lower connecting hole to the inside of the raw material tank 31. Part of the gas separated by the reflux pipe 35 can maintain an airflow to the separation tank 41 during the raw material feeding process. The waste gas treatment mechanism 4 includes a separation tank 41, which is fixedly connected to the end of the reflux pipe 35, the exhaust pipe 25 and the recovery pipe 36. The gas inside the reflux pipe 35, the exhaust pipe 25 and the recovery pipe 36 flows to the separation tank 41 and is mixed. An adsorption membrane is fixedly connected in the separation tank 41. The adsorption membrane is made of one of polysulfone, cellulose acetate, polyimide, and poly-4-methyl-1-pentene. It can physically adsorb a small amount of hydrogen in the mixed gas, thereby facilitating the subsequent discharge treatment of the hydrogen. The separation tank 41 is filled with a dehumidification block 42. The dehumidification block 42 is made of polyurethane or absorbent cotton. The dehumidification block 42 can absorb the water vapor inside the mixed gas. A treatment pipe 43 is fixedly connected to the top of the separation tank 41. The treatment pipe 43 can treat the waste gas at the top of the separation tank 41 and the small amount of hydrogen adsorbed by the adsorption membrane. The bottom of the separation tank 41 is interconnected with the air pump 37 through a pipeline, so that the air pump 37 is used to reuse the recovered protective gas. The output end of the air pump 37 is interconnected with the air inlet pipe 24, and the air pump 37 structure can pump the gas inside the reflux pipe 35 and the gas recovered by the recovery pipe 36 to the bottom of the protective tank 21. A three-way valve 39 is fixedly connected to the recovery pipe 36, and an exhaust pipe 38 is fixedly connected to the three-way valve 39. The three-way valve 39 structure can switch the recovery pipe 36, so as to facilitate the removal of air in the raw material tank 31 and the reuse of the protective gas. An exhaust pipe 25 is fixedly connected to the bottom end of the protective tank 21, and the intake pipe 24 and the exhaust pipe 25 are symmetrically connected to both sides of the top of the protective pipe. The airflow formed between the intake pipe 24 and the exhaust pipe 25 can isolate and protect the bottom of the protective tank 21. Example

[0046] like Figure 1-Figure 4 As shown, a safety control method for a hydrogen reduction furnace is specifically as follows:

[0047] First, the protective tank 21 is protected by a gas barrier; the protective gas is introduced into the air inlet pipe 22 through the booster pump 26 and a high-speed airflow is formed at the end of the connecting pipe 27, and a gas barrier is formed by the airflow to provide preliminary protection against the escape and leakage of hydrogen.

[0048] Subsequently, the feed gas of the raw material tank 31 is discharged for protection; the flow rate of the protective gas is reduced through the exhaust hood 34 and passed into the raw material tank 31, and at the same time, the recovery pipe 36 and the connecting pipe 27 are closed respectively during feeding, so that the protective gas is discharged outward from the feed pipe 32. Therefore, during the feeding process of the raw materials, the protective gas continues to flow outward from the gaps between the raw materials, and the air between the gaps between the raw materials is blown out. At the same time, the continuous outward flow of the airflow can reduce the flow of external air into the raw material tank 31.

[0049] After the feeding operation is completed, the feeding pipe 32 is closed and the recovery pipe 36 is opened to discharge the air in the raw material tank 31. During the feeding protection process, the three-way valve 39 is opened, and the waste gas in the raw material tank 31 flows from the recovery pipe 36 through the three-way valve 39 and is discharged through the waste gas pipe 38. The protective gas entering the raw material tank 31 continues to flow toward the recovery pipe 36, and a small amount of air entering the raw material tank 31 with the raw material is discharged through the recovery pipe 36.

[0050] After the air treatment operation is completed, the connecting pipe 27 is opened to allow the raw materials to move from the raw material tank 31 to the reduction furnace 1.

[0051] Finally, the reflux gas is reused; after the exhaust gas is continuously discharged for a set time through the exhaust pipe 38, the three-way valve 39 is turned, so that the exhaust gas in the raw material tank 31 flows from the recovery pipe 36 through the three-way valve 39 and then flows to the separation tank 41.

[0052] The reflux pipe 35 refluxes the gas at the top of the exhaust hood 34 into the separation tank 41 , and a small amount of hydrogen is separated from the protective gas and discharged from the processing pipe 43 , and the protective gas flows to the air pump 37 .

[0053] Turn on the air pump 37, which draws air from the bottom of the separation tank 41 and pumps the separated protective gas out from the air inlet pipe 24. After being discharged from the air inlet pipe 24, the protective gas flows to the exhaust pipe 25 and generates a high-speed airflow at the top of the protective pipe to form a second gas barrier to further protect against hydrogen leakage.

[0054] When a hydrogen reduction furnace safety control system and control method of the present invention is used, nitrogen is first introduced into the protective tank 21 from the booster pump 26, and the nitrogen flows into the protective tank 21 from the intake pipe 22 and is discharged from the exhaust pipe 23. In the process of nitrogen flowing between the intake pipe 22 and the exhaust pipe 23, high-speed gas is formed, thereby generating a gas barrier to protect hydrogen and reduce the amount of hydrogen escape. At the same time, even if a small amount of hydrogen escapes, the escaped hydrogen will flow into the exhaust pipe 23 with the high-speed airflow, thereby avoiding the flow of hydrogen into the air to cause safety hazards. After the nitrogen inside the exhaust pipe 23 flows to the end of the exhaust pipe 23, it passes through the exhaust hood 34 with a trumpet-shaped structure to reduce the flow rate of nitrogen. The upper gas inside the exhaust hood 34 flows back to the separation tank 41 through the reflux pipe 35, and the dehumidification block 42 in the separation tank 41 absorbs the water vapor in the mixed gas in the separation tank 41, and separates the hydrogen from the protective gas through the adsorption of the adsorption membrane. The lower layer of gas inside the exhaust hood 34 flows into the raw material tank 31 through the exhaust hood 34. At the same time, the air pump 37 is started, and the protective gas at the bottom of the separation tank 41 is pumped to the second intake pipe 24. The gas enters the protection tank 21 from the second intake pipe 24 and is discharged from the second exhaust pipe 25. The formed airflow performs a secondary shielding protection operation on the hydrogen. The mixed gas discharged from the second exhaust pipe 25 flows back to the separation tank 41 again for separation and reuse. When feeding, first close the three-way valve 39 and the control valve 1 28, and open the control valve 2 33 at the same time. At this time, the nitrogen entering the raw material tank 31 is discharged from the feed pipe 32. The raw material passes through the low-speed nitrogen gas flow during the feeding operation, and the air between the raw material gaps is blown out without affecting the feeding operation of the granular raw material; after the feeding operation is completed, first close the control valve 2 33, and the raw material tank 31 forms a closed space, and open the three-way valve 39 at the same time, so that the recovery pipe 36 and the exhaust pipe 38 are connected to each other. After the nitrogen enters the raw material tank 31, it squeezes the gas inside the raw material tank 31 from the recovery pipe 36 and discharges or recovers it through the exhaust pipe 38. After the exhaust pipe 38 continues to discharge the exhaust gas for a period of time, that is, the air entering the raw material tank 31 with the raw material feeding is completely discharged, the three-way valve 39 is controlled to turn, so that the recovery pipe 36 and the separation tank 41 are connected to each other, and the protective gas flows to the separation tank 41 for separation and reuse. Then, the control valve 28 is opened, and the raw material moves from the raw material tank 31 to the protective tank 21 and enters the reduction furnace 1. The double-layer high-speed airflow protection barrier in the protective tank 21 can prevent the escape of hydrogen during the raw material feeding process.

[0055] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0056] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydrogen reduction furnace safety control system, characterized in that: comprising a reduction furnace (1); A barrier protection mechanism (2) for forming a high-speed airflow protection barrier; A feed protection mechanism (3), used to protect the feed of raw materials; An exhaust gas treatment mechanism (4) for treating exhaust gas; The barrier protection mechanism (2) is connected above the reduction furnace (1), the feed protection mechanism (3) is connected above the barrier protection mechanism (2), and the exhaust gas treatment mechanism (4) is arranged on the barrier protection mechanism (2) and the feed protection mechanism (3); The barrier protection mechanism (2) comprises a protection tank (21), the protection tank (21) being fixedly connected to the top of the reduction furnace (1), the top of the protection tank (21) being fixedly connected to an air intake pipe 1 (22) and an exhaust pipe 1 (23), and the bottom of the protection tank (21) being fixedly connected to an air intake pipe 2 (24) and an exhaust pipe 2 (25); A booster pump (26) is fixedly connected to the side of the protection tank (21), and the booster pump (26) is fixedly connected to the first intake pipe (22). A protection pipe is fixedly connected to the bottom end of the protection tank (21), and the second intake pipe (24) and the second exhaust pipe (25) are symmetrically connected to both sides of the end of the protection pipe.

2. A hydrogen reduction furnace safety control system according to claim 1, characterized in that: The feed protection mechanism (3) comprises a raw material tank (31), a feed pipe (32) is fixedly connected to the top of the raw material tank (31), a control valve 2 (33) is connected to the feed pipe (32), an exhaust hood (34) is fixedly connected to the end of the exhaust pipe 1 (23), the exhaust hood (34) is fixedly connected to the outside of the raw material tank (31), and a return pipe (35) is fixedly connected to the top of the exhaust hood (34).

3. A hydrogen reduction furnace safety control system according to claim 2, characterized in that: A connecting pipe (27) is fixedly connected to the bottom end of the raw material tank (31), the raw material tank (31) is connected to the protection tank (21) via the connecting pipe (27), a control valve 1 (28) is connected to the connecting pipe (27), and the air inlet pipe 1 (22) and the air outlet pipe 1 (23) are symmetrically connected to both sides of the end of the connecting pipe (27).

4. A hydrogen reduction furnace safety control system according to claim 2, characterized in that: A recovery pipe (36) is fixedly connected to the side of the raw material tank (31), the recovery pipe (36) is in communication with the interior of the raw material tank (31), an air pump (37) is fixedly connected to the end of the recovery pipe (36) and the end of the reflux pipe (35), and an output end of the air pump (37) is in communication with the second air inlet pipe (24).

5. A hydrogen reduction furnace safety control system according to claim 4, characterized in that: The recovery pipe (36) is fixedly connected to an exhaust pipe (38), and a three-way valve (39) is connected to the connection between the exhaust pipe (38) and the recovery pipe (36).

6. A hydrogen reduction furnace safety control system according to claim 4, characterized in that: The waste gas treatment mechanism (4) comprises a separation tank (41), wherein the separation tank (41) is fixedly connected to the end of the return pipe (35), the end of the second exhaust pipe (25) and the end of the recovery pipe (36) are fixedly connected to the side of the separation tank (41), and a dehumidification block (42) is movably connected inside the separation tank (41), and the dehumidification block (42) is connected to the end of the return pipe (35), the recovery pipe (36) and the end of the second exhaust pipe (25).

7. A hydrogen reduction furnace safety control system according to claim 6, characterized in that: The top end of the separation tank (41) is fixedly connected to a processing pipe (43), and the bottom end of the separation tank (41) is connected to an air pump (37) via a pipeline.

8. A hydrogen reduction furnace safety control method, implemented by a hydrogen reduction furnace safety control system as claimed in claim 7, characterized in that: include: Gas barrier protection of the protective tank (21); protective gas is introduced into the air inlet pipe (22) through a booster pump (26) to form a high-speed airflow at the end of the connecting pipe (27), and a gas barrier is formed by the airflow to provide preliminary protection against the escape and leakage of hydrogen; The feed gas of the raw material tank (31) is discharged and protected; the flow rate of the protective gas is reduced through the exhaust hood (34) and introduced into the raw material tank (31), and the recovery pipe (36) and the connecting pipe (27) are closed during feeding, so that the protective gas is discharged from the feed pipe (32); After the feeding operation is completed, the feeding pipe (32) is closed and the recovery pipe (36) is opened to discharge the air in the raw material tank (31); After the air treatment operation is completed, the connecting pipe (27) is opened to allow the raw materials to move from the raw material tank (31) to the reduction furnace (1); During the feeding protection process, the three-way valve (39) is opened, and the waste gas in the raw material tank (31) flows from the recovery pipe (36) through the three-way valve (39) and is discharged through the waste gas pipe (38); Recycling of reflux gas; after the waste gas is continuously discharged for a set time through the waste gas pipe (38), the three-way valve (39) is turned to make the waste gas in the raw material tank (31) flow from the recovery pipe (36) through the three-way valve (39) and then flow to the separation tank (41); The reflux pipe (35) refluxes the gas at the top of the exhaust hood (34) into the separation tank (41), and a small amount of hydrogen is separated from the protective gas, and the protective gas flows to the air pump (37); The air pump (37) is turned on, and the air pump (37) extracts gas from the bottom of the separation tank (41), and pumps the separated protective gas out from the second air inlet pipe (24).

9. A hydrogen reduction furnace safety control method according to claim 8, characterized in that: The protective gas is selected from nitrogen, rare gas or a combination of one or more thereof.

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