Feeding system and method for reaction kettle in hydrogen-related environment

Abstract

The invention relates to the technical field of feeding of reaction kettles, in particular to a feeding system and method for a reaction kettle in a hydrogen-related environment, and the system comprises a reaction kettle, a feeding bin, a water-sealed tank, a condenser, a leaching system and an exhaust system; a feeding pipe is fixedly communicated between the reaction kettle and the feeding bin, an oxygen content detector I is arranged on the feeding pipe, and a gate valve and a blind plate valve are sequentially arranged on the feeding pipe between the oxygen content detector I and the reaction kettle; an outlet of the reaction kettle is fixedly communicated with a water-sealed tank and a condenser; various safety means such as nitrogen purging, oxygen content accurate detection, water seal physical isolation, micro-negative pressure feeding and static elimination are comprehensively applied, a safety system of layer-by-layer defense is formed, the possibility that three explosion elements (combustible materials, comburent and an ignition source) exist at the same time is eliminated to the maximum extent, and the problems that an existing feeding mode is simple, operation is easy and the like are solved. The accurate control cannot be realized, and the oxygen content is difficult to ensure to reach the standard.

Description

TECHNICAL FIELD

[0001] The present application relates to the feeding technology field of reaction kettle, in particular to a feeding system and method of reaction kettle in hydrogen environment. BACKGROUND

[0002] In the hydrogenation reaction or other hydrogen-related processes in the fields of chemical industry, medicine, pesticide, etc., the reaction kettle is usually filled with hydrogen or hydrogen is generated. When feeding catalyst, raw materials and other materials into such reaction kettle, improper operation can easily cause explosion accidents. The main risks come from two aspects: first, air (oxygen) enters the kettle during feeding process and mixes with hydrogen to form explosive gas; second, static electricity sparks may be generated due to friction or collision during feeding process, which ignites the explosive mixture.

[0003] Currently, the common feeding method usually adopts simple nitrogen replacement, but the number of replacement and end point judgment lack precise control, which is difficult to ensure that the oxygen content absolutely meets the standard. In addition, the traditional feeding port design is difficult to effectively isolate the infiltration of air when it is opened, and the protection against static electricity hazards that may be generated during feeding process is insufficient. Although the water seal system is often used to maintain system pressure, its application in feeding safety interlocking is not perfect. Therefore, it is of great significance to develop a systematic, rigorous and multiple-protected feeding method for hydrogen-related processes to ensure production safety and prevent serious accidents. SUMMARY

[0004] The present application provides a feeding system and method of reaction kettle in hydrogen environment, which overcomes the shortcomings of the prior art and effectively solves the problem that the existing feeding method is simple and cannot achieve precise control, making it difficult to ensure that the oxygen content meets the standard.

[0005] To solve the above problems, one of the technical solutions of the present application is achieved by the following way: a feeding system of reaction kettle in hydrogen environment, comprising: a reaction kettle, a feeding bin, a water seal tank, a condenser, a rinsing system and an exhaust system; A feeding pipe is fixedly connected between the reaction kettle and the feeding bin, and an oxygen content detector one is arranged on the feeding pipe. A plug valve and a blind valve are arranged in sequence on the feeding pipe between the oxygen content detector one and the reaction kettle. The outlet of the reaction kettle is fixedly connected with the water seal tank and the condenser. The outlet of the condenser is connected with the reaction kettle and the rinsing system, respectively. The rinsing system is connected with the exhaust system. Nitrogen gas pipelines are fixedly connected to the feeding pipe between the feeding bin and the oxygen content detector one, the reaction kettle and the exhaust system, and nitrogen gas purging valves are arranged on each nitrogen gas pipeline. A pressure transmitter is further arranged on the top of the reaction kettle.

[0006] The above-mentioned elution system comprises an elution tower, an elution circulating tank and an elution circulating pump, the outlet of the condenser is fixedly communicated with the elution tower, the bottom of the elution tower is fixedly communicated with the elution circulating tank, the outlet of the elution circulating tank is fixedly communicated with the elution circulating pump, and the outlet of the elution circulating pump is fixedly communicated with the upper portion of the elution tower.

[0007] The above-mentioned exhaust system comprises a Venturi and an air dilution fan, the top of the elution tower is fixedly communicated with an exhaust pipe, the other end of the exhaust pipe is fixedly communicated with the Venturi, the inlet end of the Venturi is fixedly communicated with the air dilution fan, a pneumatic on-off valve is fixedly installed on the exhaust pipe, and an oxygen content detector two is fixedly installed on the exhaust pipe between the pneumatic on-off valve and the Venturi.

[0008] The second technical scheme of the present application is realized by the following method: Preparation before feeding and system isolation: confirming whether the pressure test of the reaction kettle is qualified, closing all material inlet and outlet valves of the reaction kettle, keeping the exhaust gas elution system and the exhaust system of the reaction kettle open, injecting water into the water seal tank and keeping the water level at a high overflow position to form an effective water seal liquid level, and physically isolating the inside of the reaction kettle from the atmosphere; Nitrogen replacement and oxygen content detection: nitrogen is introduced into the reaction kettle through the nitrogen purging valve at the top of the reaction kettle for pressurization, and exhaust replacement is performed through the condenser and the exhaust system to complete one replacement; the pressurization-exhaust replacement process is repeated at least 3 times until the replacement is qualified, i.e., the oxygen content meets the standard; Negative pressure feeding operation: after the oxygen content meets the standard, air is drawn from the top of the reaction kettle through the air dilution fan of the exhaust system to form a micro negative pressure of-5-0kPa in the reaction kettle; under the condition of the micro negative pressure, the nitrogen purging valve connected to the feeding pipe is opened, the oxygen concentration in the feeding pipe is detected through the oxygen content detector installed on the feeding pipe, a safety threshold X2 of the oxygen content is set, when the oxygen concentration is stable and lower than the safety threshold X2, the blind plate valve is opened first, then the plug-in valve is opened, and the metal material is fed into the reaction kettle; the nitrogen purging valve directly connected to the reaction kettle and the feeding pipe is kept purging during the whole feeding process; Sealing after feeding and system recovery: after the feeding of the material is completed, the plug-in valve of the feeding pipe is closed first, then the blind plate valve is closed, and it is confirmed that the sealing is tight, the reactor is subjected to a pressure test, and after the pressure test is qualified, hydrochloric acid is added into the reaction kettle according to the process requirements, and the subsequent reaction is started.

[0009] The above-mentioned closing all material inlet and outlet valves of the reaction kettle and keeping the exhaust gas elution system and the exhaust system of the reaction kettle open comprises: The plug-in valve, the blind plate valve and the nitrogen purging valve are closed; The elution circulating pump of the elution system is opened to make the elution system normally operate; Turn on the air dilution fan of the exhaust system.

[0010] The above-mentioned process of pressurizing the reactor by introducing nitrogen gas and purging the gas through a condenser and exhaust system to complete one purging cycle includes: Nitrogen gas is introduced into the reactor, and the pressure inside the reactor is detected by a pressure transmitter; Set a first preset pressure P1. When the pressure inside the reactor rises to the first preset pressure P1, close the nitrogen purging valve directly connected to the reactor and stop charging nitrogen into the reactor. By using a condenser, a rinsing system, and an exhaust system connected to the reactor, the pressure inside the reactor is made slightly negative, thus completing one replacement.

[0011] The above, up to and including the replacement of the qualified parts, includes: During the final purging, nitrogen gas is introduced into the reactor until a slight positive pressure is reached; Set a second preset pressure P2. When the pressure inside the reactor reaches the second preset pressure P2, the oxygen concentration in the gas phase space inside the reactor is detected by an oxygen content detector. Set an oxygen concentration safety threshold X1. When the oxygen concentration in the gas phase space inside the reactor is stably lower than the safety threshold X1, the replacement is considered qualified.

[0012] The first preset pressure P1 is 0.2-0.3 MPa; the second preset pressure P2 is 0.35-0.40 MPa.

[0013] The above-mentioned safe thresholds for oxygen concentration X1 are ≤ 0.5% and for oxygen content X2 are ≤ 0.2%.

[0014] The aforementioned feed pipe is equipped with a conductive component to ensure reliable electrostatic grounding; or / and, an interlock reaction is set between the oxygen content detector and the blind valve. When the oxygen concentration detected by the oxygen content detector is lower than the safety threshold X2 and the reactor is under a slight negative pressure, the blind valve opens; or / and, the standard for passing the pressure test in the reactor is a pressure drop ≤ 0.2 kPa within 30 minutes.

[0015] Compared with the prior art, the present invention has the following advantages: 1. Extremely high safety: This invention comprehensively utilizes multiple safety measures such as nitrogen purging, precise oxygen content detection, water seal physical isolation, micro-negative pressure feeding, and static electricity elimination to form a multi-layered safety system, which eliminates the possibility of the simultaneous existence of the three elements of an explosion (combustible material, oxidizer, and ignition source) to the greatest extent possible.

[0016] 2. Rigorous Operation: This invention provides clear ranges for key parameters such as the number of nitrogen purging cycles, pressure, safe threshold for oxygen content, and negative pressure value during material feeding, making the operation systematic and avoiding safety hazards caused by differences in human experience.

[0017] 3. Safety Interlock: Through hardware interlock, the feeding port can only be opened when both oxygen content and pressure safety conditions are met simultaneously, which technically eliminates the risk of misoperation and improves the reliability of the method. Attached Figure Description

[0018] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0019] Figure 1 This is a system structure diagram of Embodiment 1 of the present invention.

[0020] In the diagram: 1 - Reactor; 2 - Feed hopper; 3 - Water seal tank; 4 - Condenser; 5 - Washing tower; 6 - Washing circulation tank; 7 - Venturi; 8 - Oxygen content detector 1; 9 - Pressure transmitter; 10 - Oxygen content detector 2; 11 - Nitrogen purging valve; 12 - Exhaust pipe; 13 - Feeding pipe; 14 - Gate valve; 15 - Blind valve; 16 - Pneumatic switch valve; 17 - Nitrogen pipeline; 18 - Washing circulation pump; 19 - Air dilution fan. Detailed Implementation

[0021] The present invention is not limited to the following embodiments, and the specific implementation can be determined according to the technical solution of the present invention and the actual situation.

[0022] Example 1, such as Figure 1 As shown, this embodiment of the invention discloses a feeding system for a reactor in a hydrogen-related environment, including: a reactor 1, a feeding silo 2, a water seal tank 3, a condenser 4, a rinsing system, and an exhaust system; A feed pipe 13 is fixedly connected between the reactor 1 and the feed hopper 2. An oxygen content detector 8 is installed on the feed pipe 13. A slide valve 14 and a blind valve 15 are installed sequentially on the feed pipe 13 between the oxygen content detector 8 and the reactor 1. A water seal tank 3 and a condenser 4 are fixedly connected to the outlet of the reactor 1. The outlet of the condenser 4 is connected to the reactor 1 and the rinsing system, respectively. An exhaust system is connected to the rinsing system. Nitrogen pipelines 17 are fixedly connected to the feed pipe 13 between the feed hopper 2 and the oxygen content detector 8, the reactor 1, and the exhaust system. Each nitrogen pipeline 17 is equipped with a nitrogen purge valve 11. A pressure transmitter 9 is also installed on the top of the reactor 1.

[0023] like Figure 1 As shown, the rinsing system includes a rinsing tower 5, a rinsing circulation tank 6, and a rinsing circulation pump 18. The outlet of the condenser 4 is fixedly connected to the rinsing tower 5, the bottom of the rinsing tower 5 is fixedly connected to the rinsing circulation tank 6, the outlet of the rinsing circulation tank 6 is fixedly connected to the rinsing circulation pump 18, and the outlet of the rinsing circulation pump 18 is fixedly connected to the upper part of the rinsing tower 5.

[0024] likeFigure 1 As shown, the exhaust system includes a Venturi 7 and an air dilution fan 19. An exhaust pipe 12 is fixedly connected to the top of the scrubbing tower 5. The other end of the exhaust pipe 12 is fixedly connected to the Venturi 7. The inlet end of the Venturi 7 is fixedly connected to the air dilution fan 19. A pneumatic switch valve 16 is fixedly installed on the exhaust pipe 12. An oxygen content detector 10 is fixedly installed on the exhaust pipe 12 between the pneumatic switch valve 16 and the Venturi 7.

[0025] Example 2: This embodiment of the invention discloses a feeding method for reactor 1 in a hydrogen-containing environment, including the following steps: Preparation and system isolation before feeding: Confirm that the pressure test of reactor 1 is qualified, close all material inlet and outlet valves of reactor 1, and keep the tail gas scrubbing system and exhaust system of reactor 1 open; fill water into water seal tank 3 and keep it at a high overflow level to form an effective water seal liquid level, so as to physically isolate the inside of reactor 1 from the atmosphere. Nitrogen purging and oxygen content detection: Nitrogen gas is introduced into reactor 1 through nitrogen purging valve 11 at the top of reactor 1 to pressurize it, and then exhaust gas through condenser 4 and exhaust system to complete one purging; repeat this pressurization-exhaust purging process at least 3 times until the purging is qualified, that is, the oxygen content meets the standard; Negative pressure feeding operation: After the oxygen content reaches the standard, the air dilution fan 19 of the exhaust system draws air from the top of the reactor 1 to form a slight negative pressure of -5 to 0 kPa inside the reactor 1; under this slight negative pressure, the nitrogen purging valve 11 connected to the feeding pipe 13 is opened, and the oxygen concentration in the feeding pipe 13 is detected by the oxygen content detector installed on the feeding pipe 13. The oxygen content safety threshold X2 is set. When the oxygen concentration is stably lower than the safety threshold X2, the blind valve 15 is opened first, and then the slide valve 14 is opened to feed the metal material into the reactor 1. Throughout the feeding process, the nitrogen purging valve 11, which is directly connected to the reactor 1 and connected to the feeding pipe 13, is always kept in a purging state. After feeding, sealing and system recovery: After the material is fed, first close the slide valve 14 of the feed pipe 13, then close the blind valve 15, and confirm that the seal is tight. Perform a pressure test on the reactor 1. After confirming that the pressure test is qualified, hydrochloric acid can be added into the reactor 1 according to the process requirements to start the subsequent reaction.

[0026] The above-mentioned closing of all material inlet and outlet valves of reactor 1, while keeping the tail gas scrubbing system and exhaust system of reactor 1 open, includes: Close the gate valve 14, the blind valve 15, and the nitrogen purging valve 11; Turn on the rinsing circulation pump 18 of the rinsing system to make the rinsing system run normally; Turn on the air dilution fan 19 of the exhaust system.

[0027] The process of pressurizing the reactor 1 by introducing nitrogen gas and purging the gas through the condenser 4 and the exhaust system to complete one purging step includes: Nitrogen gas is introduced into reactor 1, and the pressure inside reactor 1 is detected by pressure transmitter 9. Set a first preset pressure P1. When the pressure inside the reactor 1 rises to the first preset pressure P1, close the nitrogen purging valve 11 that is directly connected to the reactor 1 and stop charging nitrogen into the reactor 1. By using the condenser 4, the rinsing system, and the exhaust system connected to the reactor 1, the pressure inside the reactor 1 is made to be slightly negative, thus completing one replacement.

[0028] The above, up to and including the replacement of the qualified parts, includes: During the final purging, nitrogen gas is introduced into reactor 1 until a slight positive pressure is reached; Set a second preset pressure P2. When the pressure P2 is reached in the reactor 1, the oxygen concentration in the gas phase space inside the reactor 1 is detected by the oxygen content detector 210. Set an oxygen concentration safety threshold X1. When the oxygen concentration in the gas phase space inside reactor 1 is stably lower than the safety threshold X1, the replacement is qualified.

[0029] The first preset pressure P1 is 0.2-0.3 MPa; the second preset pressure P2 is 0.35-0.40 MPa.

[0030] The above-mentioned safe threshold for oxygen concentration X1 is ≤ 0.5%; the safe threshold for oxygen content X2 is ≤ 0.2%.

[0031] The aforementioned feeding pipe 13 is equipped with a conductive component to ensure reliable electrostatic grounding.

[0032] An interlocking reaction is set between the oxygen content detector 8 and the blind valve 15. When the oxygen concentration detected by the oxygen content detector 8 is lower than the safety threshold X2 and the reactor 1 is under a slight negative pressure, the blind valve 15 opens.

[0033] The standard for passing the pressure test inside the above-mentioned reactor 1 is a pressure drop of ≤0.2kPa within 30 minutes.

[0034] Example 3: 1. Preparation and system isolation before feeding: Confirm that the pressure test of reactor 1 is qualified, close all material inlet and outlet valves of reactor 1, but keep the tail gas scrubbing system and air dilution fan 19 of reactor 1 on; add water to the water seal tank 3 connected to the top of reactor 1 and keep it at a high overflow level to form an effective water seal liquid level, so as to physically isolate the inside of reactor 1 from the atmosphere.

[0035] 2. Nitrogen replacement and oxygen content detection: Nitrogen is introduced into the reactor 1 through the nitrogen purge valve 11 at the top of the reactor 1 for pressurization. When the pressure in the reactor 1 rises to the first preset pressure of 0.2 Mpa, the nitrogen purge valve 11 is closed and nitrogen filling is stopped. Then, the pressure in the reactor 1 is made slightly negative through the condenser 4 and Venturi 7 at the top of the reactor 1 to complete one replacement. This pressurization-exhaust replacement process is repeated at least 3 times. After the last replacement is completed, nitrogen is filled into the reactor 1 until it is slightly positive pressure. When the pressure is 0.35 Mpa, the oxygen concentration in the gas phase space of the reactor 1 is detected by the oxygen content detector II 10 installed on the exhaust pipe 12 of the reactor 1. When the stable reading of the oxygen concentration is 0.5%, it is regarded as qualified replacement.

[0036] 3. Negative pressure feeding operation: After confirming that the oxygen content meets the standard, air is drawn from the top of the reactor 1 through the air dilution fan 19 to create a slightly negative pressure of -5 - 0 kPa in the reactor 1. Under the condition of maintaining this slightly negative pressure, the nitrogen purge valve 11 on the feeding pipe 13 is opened, and the oxygen concentration in the feeding pipe 13 is detected by the oxygen content detector I 8 installed on the feeding pipe 13. When the stable reading of the oxygen concentration is 0.2%, it is regarded as qualified. First, the blind plate valve 15 is opened, and then the plug valve 14 is opened to put the metal material into the reactor 1. During the whole feeding process, the nitrogen purge valves 11 of the reactor 1 body and the feeding pipe 13 remain in the purge state. In particular, a conductive component is set at the flange connection part of the feeding pipe 13 to ensure reliable static electricity grounding.

[0037] 4. Sealing after feeding and system restoration: After the material is added, first close the plug valve 14 of the feeding pipe 13, then close the blind plate valve 15, and confirm that the sealing is tight. The reactor 1 is subjected to a pressure test. After confirming that the pressure test is qualified, hydrochloric acid can be added into the reactor 1 according to the process requirements to start the subsequent reaction.

[0038] Example 4: 1. Preparation before feeding and system isolation: Confirm whether the pressure test of the reactor 1 body is qualified, close all the material inlet and outlet valves of the reactor 1, but keep the tail gas scrubbing system and the air dilution fan 19 of the reactor 1 open; inject water into the water seal tank 3 connected to the top of the reactor 1 and keep it at a high overflow to form an effective water seal level to physically isolate the inside of the reactor 1 from the atmosphere.

[0039] 2. Nitrogen Replacement and Oxygen Content Detection: Nitrogen gas is introduced into reactor 1 through the nitrogen purge valve 11 at the top of reactor 1 to pressurize it. When the pressure inside reactor 1 reaches the first preset pressure of 0.25 MPa, the nitrogen purge valve 11 is closed to stop nitrogen charging. Then, the reactor pressure is brought to a slightly negative pressure through the condenser 4 and venturi 7 at the top of reactor 1, completing one replacement. This pressurization-exhaust replacement process is repeated at least 3 times. After the last replacement, nitrogen gas is introduced into reactor 1 to a slightly positive pressure of 0.38 MPa. The oxygen concentration in the gas phase space inside the reactor is detected by the oxygen content detector 10 installed on the exhaust pipe 12 of reactor 1. If the oxygen concentration reading is stable at 0.5%, the replacement is considered qualified.

[0040] 3. Negative Pressure Feeding Operation: After confirming that the oxygen content meets the standard, air is drawn from the top of the reactor 1 using the air dilution blower 19 to create a slight negative pressure of -5 to -0 kPa inside the reactor 1. Under this slight negative pressure, the nitrogen purging valve 11 on the feeding pipe 13 is opened. The oxygen concentration in the feeding pipe 13 is detected by the oxygen content detector 8 installed on the feeding pipe 13. If the oxygen concentration reading is consistently 0.2%, it is considered qualified. First, the blind valve 15 is opened, and then the gate valve 14 is opened to feed the metal material into the reactor 1. Throughout the feeding process, the nitrogen purging valve 11 of the reactor 1 body and the feeding pipe 13 remains in a purging state. In particular, the main function of the gate valve 14 is to protect the blind valve 15 and prevent it from being accidentally damaged during the feeding process.

[0041] 4. Sealing and System Recovery after Material Feeding: After the material feeding is completed, first close the slide valve 14 of the feed pipe 13, then close the blind valve 15, and confirm that the seal is tight. Perform a pressure test on the reactor 1. After confirming that the pressure test is qualified, hydrochloric acid can be added into the reactor 1 according to the process requirements to start the subsequent reaction.

[0042] Example 5: 1. Preparation and system isolation before feeding: Confirm that the pressure test of reactor 1 is qualified, close all material inlet and outlet valves of reactor 1, but keep the tail gas scrubbing system and air dilution fan 19 of reactor 1 on; add water to the water seal tank 3 connected to the top of reactor 1 and keep it at a high overflow level to form an effective water seal liquid level, so as to physically isolate the inside of reactor 1 from the atmosphere.

[0043] 2. Nitrogen Replacement and Oxygen Content Detection: Nitrogen gas is introduced into the reactor 1 through the nitrogen purge valve 11 at the top of the reactor 1 to pressurize it. When the pressure inside the reactor reaches the first preset pressure of 0.3 MPa, the nitrogen purge valve 11 is closed to stop nitrogen charging. Then, the reactor pressure is brought to a slightly negative pressure through the condenser 4 and venturi 7 at the top of the reactor 1, completing one replacement. This pressurization-venting replacement process is repeated at least 3 times. After the last replacement, nitrogen gas is introduced into the reactor to a slightly positive pressure of 0.4 MPa. The oxygen concentration in the gas phase space inside the reactor is detected by the oxygen content detector 10 installed on the exhaust pipe 12 of the reactor 1. If the oxygen concentration reading is stable at 0.5%, the replacement is considered qualified.

[0044] 3. Negative Pressure Feeding Operation: After confirming that the oxygen content meets the standard, air is drawn from the top of the reactor 1 using the air dilution blower 19 to create a slight negative pressure of -5 to -0 kPa inside the reactor 1. Under this slight negative pressure, the nitrogen purging valve 11 on the feeding pipe 13 is opened. The oxygen concentration in the feeding pipe 13 is detected by the oxygen content detector 8 installed on the feeding pipe 13. If the oxygen concentration reading is consistently 0.2%, it is considered qualified. The safety interlock system automatically unlocks the blind valve 15, allowing the blind valve 15 and the gate valve 14 to be opened, and the metal material is fed into the reactor 1. Throughout the feeding process, the nitrogen purging valve 11 of the reactor 1 body and the feeding pipe 13 remains in a purging state.

[0045] 4. Sealing and System Recovery after Material Feeding: After the material feeding is completed, first close the slide valve 14 of the feed pipe 13, then close the blind valve 15, and confirm that the seal is tight. Perform a pressure test on the reactor 1. After confirming that the pressure test is qualified, hydrochloric acid can be added into the reactor 1 according to the process requirements to start the subsequent reaction.

[0046] In summary, compared with the prior art, the present invention has the following advantages: 1. Extremely high safety: This invention comprehensively utilizes multiple safety measures such as nitrogen purging, precise oxygen content detection, water seal physical isolation, micro-negative pressure feeding, and static electricity elimination to form a multi-layered safety system, which eliminates the possibility of the simultaneous existence of the three elements of an explosion (combustible material, oxidizer, and ignition source) to the greatest extent possible.

[0047] 2. Rigorous Operation: This invention provides clear ranges for key parameters such as the number of nitrogen purging cycles, pressure, safe threshold for oxygen content, and negative pressure value during material feeding, making the operation systematic and avoiding safety hazards caused by differences in human experience.

[0048] 3. Safety Interlock: Through hardware interlock, the feeding port can only be opened when both oxygen content and pressure safety conditions are met simultaneously, which technically eliminates the risk of misoperation and improves the reliability of the method.

Claims

1. A feeding system for a reactor in a hydrogen-containing environment, characterized in that, include: Reactor, feed silo, water seal tank, condenser, rinsing system and exhaust system; A feed pipe is fixedly connected between the reactor and the feed silo. An oxygen content detector is installed on the feed pipe. A slide valve and a blind valve are installed sequentially on the feed pipe between the oxygen content detector and the reactor. A water seal tank and a condenser are fixedly connected to the reactor outlet. The condenser outlet is connected to the reactor and the rinsing system, respectively. An exhaust system is connected to the rinsing system. Nitrogen pipelines are fixedly connected to the feed pipe between the feed silo and the oxygen content detector, the reactor, and the exhaust system. Each nitrogen pipeline is equipped with a nitrogen purging valve. A pressure transmitter is also installed on the top of the reactor.

2. The feeding system for a reactor in a hydrogen-containing environment according to claim 1, characterized in that, The rinsing system includes a rinsing tower, a rinsing circulation tank, and a rinsing circulation pump. The outlet of the condenser is fixedly connected to the rinsing tower, the bottom of the rinsing tower is fixedly connected to the rinsing circulation tank, the outlet of the rinsing circulation tank is fixedly connected to the rinsing circulation pump, and the outlet of the rinsing circulation pump is fixedly connected to the upper part of the rinsing tower.

3. The feeding system for a reactor in a hydrogen-containing environment according to claim 2, characterized in that, The exhaust system includes a venturi and an air dilution fan. An exhaust pipe is fixedly connected to the top of the scrubbing tower, and a venturi is fixedly connected to the other end of the exhaust pipe. The air dilution fan is fixedly connected to the inlet end of the venturi. A pneumatic switch valve is fixedly installed on the exhaust pipe, and an oxygen content detector is fixedly installed on the exhaust pipe between the pneumatic switch valve and the venturi.

4. A method for feeding materials into a reactor in a hydrogen-containing environment, characterized in that, Includes the following steps: Preparation and system isolation before feeding: Confirm that the pressure test of the reactor is qualified, close all material inlet and outlet valves of the reactor, and keep the reactor tail gas scrubbing system and exhaust system open; fill the water seal tank with water and keep it at a high overflow level to form an effective water seal liquid level, physically isolating the inside of the reactor from the atmosphere; Nitrogen purging and oxygen content detection: Nitrogen gas is introduced into the reactor through the nitrogen purging valve at the top of the reactor to pressurize it, and then the gas is purged through the condenser and exhaust system to complete one purging. This pressurization-exhaust purging process is repeated at least 3 times until the purging is qualified, that is, the oxygen content meets the standard. Negative pressure feeding operation: After the oxygen content reaches the standard, air is drawn from the top of the reactor through the air dilution fan of the exhaust system to form a slight negative pressure of -5 to 0 kPa inside the reactor; under this slight negative pressure, the nitrogen purging valve connected to the feeding pipe is opened, and the oxygen concentration in the feeding pipe is detected by the oxygen content detector installed on the feeding pipe. The oxygen content safety threshold X2 is set. When the oxygen concentration is stably lower than the safety threshold X2, the blind valve is opened first, and then the slide valve is opened to feed the metal material into the reactor. Throughout the feeding process, the nitrogen purging valves directly connected to the reactor and connected to the feeding pipe are always kept in the purging state. Post-feeding sealing and system recovery: After the material is fed, first close the gate valve of the feed pipe, then close the blind valve, and confirm that the seal is tight. Perform a pressure test on the reactor. After confirming that the pressure test is qualified, hydrochloric acid can be added to the reactor according to the process requirements to start the subsequent reaction.

5. The feeding method for a reactor in a hydrogen-containing environment according to claim 4, characterized in that, The step of closing all material inlet and outlet valves of the reactor while keeping the reactor tail gas scrubbing system and exhaust system open includes: Close the gate valve, blind valve, and nitrogen purge valve; Turn on the rinsing circulation pump of the rinsing system to ensure normal operation of the rinsing system; Turn on the air dilution fan of the exhaust system.

6. The feeding method for a reactor in a hydrogen-containing environment according to claim 4, characterized in that, The process of pressurizing the reactor by introducing nitrogen gas and purging the gas through a condenser and exhaust system to complete one purging step includes: Nitrogen gas is introduced into the reactor, and the pressure inside the reactor is detected by a pressure transmitter; Set a first preset pressure P1. When the pressure inside the reactor rises to the first preset pressure P1, close the nitrogen purging valve directly connected to the reactor and stop charging nitrogen into the reactor. By using a condenser, a rinsing system, and an exhaust system connected to the reactor, the pressure inside the reactor is made slightly negative, thus completing one replacement.

7. The feeding method for a reactor in a hydrogen-containing environment according to claim 4, characterized in that, The process until the replacement is successful includes: During the final purging, nitrogen gas is introduced into the reactor until a slight positive pressure is reached; Set a second preset pressure P2. When the pressure inside the reactor reaches the second preset pressure P2, the oxygen concentration in the gas phase space inside the reactor is detected by an oxygen content detector. Set an oxygen concentration safety threshold X1. When the oxygen concentration in the gas phase space inside the reactor is stably lower than the safety threshold X1, the replacement is considered qualified.

8. A method for feeding materials into a reactor in a hydrogen-containing environment according to claim 6 or 7, characterized in that, The first preset pressure P1 is 0.2-0.3 MPa; the second preset pressure P2 is 0.35-0.40 MPa.

9. The feeding method for a reactor in a hydrogen-containing environment according to claim 7, characterized in that, The oxygen concentration safety threshold X1 is ≤ 0.5%; the oxygen content safety threshold X2 is ≤ 0.2%.

10. The feeding method for a reactor in a hydrogen-containing environment according to claim 4, characterized in that, The feeding pipe is equipped with a conductive component to ensure reliable electrostatic grounding; or / and, an interlock reaction is set between the oxygen content detector and the blind valve. When the oxygen concentration detected by the oxygen content detector is lower than the safety threshold X2 and the reactor is under a slight negative pressure, the blind valve opens; or / and, the standard for passing the pressure test in the reactor is a pressure drop ≤ 0.2 kPa within 30 minutes.

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