A system for treating exhaust gas from potassium tert-butoxide, sodium tert-butoxide

Abstract

The application belongs to the technical field of tail gas recovery, and specifically provides a tert-butyl alcohol potassium and tert-butyl alcohol sodium tail gas treatment system, which comprises a reaction kettle, the reaction kettle is connected to a tail gas treatment device through an exhaust pipe, a gas detector, a first three-way pipe fitting and a second three-way pipe fitting are arranged on the exhaust pipe, a first check valve is arranged at a branch connection of the first three-way pipe fitting and connected to an inert gas source, a one-way valve is arranged at a main road connection of the second three-way pipe fitting and connected to a condenser, a second check valve is arranged at a branch connection of the second three-way pipe fitting and connected to an inertization reactor, the inertization reactor is filled with a low-temperature catalytic oxygen-consuming agent, the inertization reactor is connected to a dryer, the dryer is connected to the condenser, and the condenser is connected to a cold liquid tank; the condenser is connected to an activated carbon adsorption tank, the activated carbon adsorption tank is connected to an absorption tower, the absorption tower is connected to a hydrogen compressor, the hydrogen compressor is connected to a PSA hydrogen unit, and the PSA hydrogen unit is connected to a hydrogen reactor. The above forms an active hydrogen safety protection system.

Description

Technical Field

[0001] This invention relates to the field of exhaust gas recovery technology, and in particular to an exhaust gas treatment system for potassium tert-butoxide and sodium tert-butoxide. Background Technology

[0002] Potassium tert-butoxide and sodium tert-butoxide are important intermediates in organic synthesis, widely used in pharmaceuticals, pesticides, and polymer materials. Their industrial production often employs a metallurgical route involving the direct reaction of alkali metal potassium or sodium with tert-butanol, generating a large amount of tail gas during the reaction. The main components of this tail gas include: hydrogen gas, a direct product of alkali metal substitution of hydroxyl hydrogen in alcohols; unreacted tert-butanol gas; and small amounts of alkali mist and water vapor.

[0003] The treatment of the aforementioned exhaust gases faces two major challenges. The first is the risk of combustion and explosion. Hydrogen has an extremely wide explosive limit; if the production system's seals fail, pipeline valves leak, or air is introduced due to operational errors, an explosive mixture can easily form in the pipelines and treatment equipment, leading to a serious safety accident. Currently, industry hydrogen safety measures mainly rely on passive protection devices such as static flame arresters and water seal tanks. These devices can only physically block the flame front when it reaches the point of propagation, and cannot detect abnormal oxygen content gradually accumulating inside the pipeline due to slow leakage, resulting in monitoring blind spots and response delays. Once the oxygen content quietly rises to the explosive range in the pipeline upstream of the flame arrester, the system lacks the ability to actively intervene and mitigate the risk.

[0004] Secondly, the utilization rate of exhaust gas resources is low. Existing treatment solutions mostly adopt water absorption and activated carbon adsorption or direct catalytic combustion technologies. Among them, although water absorption can recover some tert-butanol, hydrogen is often directly burned and emitted, resulting in resource waste; activated carbon adsorption requires regular replacement of saturated carbon, generating hazardous waste; catalytic combustion requires continuous external heating to maintain the ignition temperature, resulting in high energy consumption, and the hydrogen contained in the exhaust gas is not utilized. Summary of the Invention

[0005] To address the aforementioned deficiencies, this invention integrates three levels of protection—online monitoring and early warning, inert gas dilution and inerting, and low-temperature catalytic oxygen removal—to form an active exhaust gas safety protection system.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a tail gas treatment system for potassium tert-butoxide and sodium tert-butoxide, comprising: a plurality of reaction vessels, wherein the exhaust port of the reaction vessels is connected to a tail gas treatment device through an exhaust pipe, a first gas detector is provided on the exhaust pipe, and a first tee fitting is also provided on the exhaust pipe, wherein a first check valve is provided at the branch interface of the first tee fitting, and the inlet end of the first check valve is connected to an inert gas source; The exhaust pipe is also equipped with a second three-way fitting. A one-way valve is installed at the main interface of the second three-way fitting. The one-way valve is connected to the air inlet of the condenser. A second check valve is installed at the branch interface of the second three-way fitting. The outlet of the second check valve is connected to the inerting reactor. The inerting reactor is filled with a low-temperature catalytic oxygen-consuming agent. The outlet of the inerting reactor is connected to the air inlet of the dryer. The outlet of the dryer is connected to the air inlet of the condenser. The liquid outlet of the condenser is connected to the cold liquid tank through the liquid outlet pipe. The outlet of the condenser is connected to the activated carbon adsorption box, the activated carbon adsorption box is connected to the absorption tower, the absorption tower is connected to the inlet of the hydrogen compressor, the outlet of the hydrogen compressor is connected to the PSA hydrogen unit for hydrogen recovery, the outlet of the PSA hydrogen unit is connected to the hydrogen reactor, and the outlet of the hydrogen reactor is connected to the atmosphere.

[0007] As a further improvement of the present invention, it also includes a third gas detector installed in the factory building and an exhaust fan connected to the factory building. The exhaust fan is installed in the exhaust gas inlet pipe. A second gas detector is installed on the side of the exhaust gas inlet pipe near the exhaust fan. The exhaust gas inlet pipe is also connected to a second inert gas pipeline equipped with a sixth check valve. The inlet end of the sixth check valve is connected to an inert gas source through the second inert gas pipeline. A third tee fitting is installed on the exhaust gas inlet pipe. A fourth check valve is installed at the main interface of the third tee fitting. The outlet end of the fourth check valve is connected to the condenser inlet end. A fifth check valve is installed at the branch interface of the third tee fitting. The outlet end of the fifth check valve is connected to the inerting reactor.

[0008] As a further improvement of the present invention, the inert gas source includes an inert gas storage tank, the outlet of the inert gas storage tank is connected to an inert gas supply pump, and the outlet of the inert gas supply pump is connected to a branch of the second inert gas pipeline and the first tee fitting.

[0009] As a further improvement of the present invention, the air intake end of the air intake fan is provided with a filter screen.

[0010] As a further improvement of the present invention, a buffer tank is provided between the second three-way fitting and the condenser connecting pipe, and the outlet end of the fourth check valve is first connected to the buffer tank and then enters the condenser inlet end.

[0011] As a further improvement of the present invention, a Venturi tube section is provided between the second gas detector in the exhaust gas inlet pipe and the second inert gas pipeline to accelerate the transport of leaked exhaust gas.

[0012] As a further improvement of the present invention, the PSA hydrogen unit includes a PSA hydrogen adsorption tower with an adsorbent bed inside, the PSA hydrogen adsorption tower is connected to the outlet end of the hydrogen compressor, the PSA hydrogen adsorption tower is also connected to a vacuum pump, and the top of the PSA hydrogen adsorption tower is connected to a hydrogen recovery tank.

[0013] As a further improvement of the present invention, the active component of the low-temperature catalytic oxygen depleting agent is a Pt / Al2O3 catalyst with a Pt loading of 0.3~0.5wt% and a support of spherical γ-Al2O3 with a diameter of 3~5mm and a specific surface area of ​​≥200m2 / g.

[0014] As a further improvement of the present invention, the hydrogen reactor is filled with the same low-temperature catalytic oxygen-consuming agent as that in the inerting reactor, and the hydrogen reactor is also connected to an air intake fan to provide the oxygen required for the reaction and ensure that the hydrogen reacts fully.

[0015] The beneficial effects of this invention are: 1. This application integrates three levels of protection—online monitoring and early warning, inert gas dilution and inerting, and low-temperature catalytic oxygen depletion—to form an active hydrogen safety protection system. When the first gas detector detects that the oxygen content in the exhaust gas exceeds a preset threshold, the inert gas supply pump automatically starts, injecting inert gas into the exhaust pipeline for preliminary dilution. Simultaneously, the pipeline valves switch, and the oxygen-containing exhaust gas is introduced into the inerting reactor. Utilizing the low-temperature catalytic oxygen-consuming agent packed within, the hydrogen already present in the catalytic exhaust gas undergoes a flameless reaction 2H₂ + O₂ → 2H₂O, passively consuming the residual oxygen chemically. This approach overcomes the limitations of traditional flame arresters' passive flame arrest, proactively intervening and eliminating the risk of combustion and explosion before the oxygen content approaches the lower explosive limit.

[0016] 2. This application employs a three-stage series tert-butanol recovery and elimination route: cryogenic condensation, activated carbon adsorption, and water absorption tower washing. The cryogenic condenser condenses most of the tert-butanol gas into a liquid state for recovery at low temperatures; trace amounts of uncondensed vapor are deeply adsorbed by the activated carbon adsorption box; and residual trace organic matter is finally absorbed by spray water washing in the water absorption tower. This recovery method significantly improves the overall tert-butanol recovery rate compared to traditional single-stage water washing or single-stage condensation schemes. Furthermore, because most of the tert-butanol is condensed in advance, the frequency of activated carbon replacement and the amount of hazardous waste generated are greatly reduced.

[0017] 3. The hydrogen-rich gas, purified by the absorption tower, enters the hydrogen compressor and the PSA hydrogen unit. The composite adsorbent bed in the PSA hydrogen adsorption tower of the PSA hydrogen unit preferentially adsorbs trace amounts of moisture, residual organic matter, and possible impurities such as nitrogen under high pressure. Hydrogen, as a difficult-to-adsorb component, flows out from the top of the tower and is collected in a hydrogen recovery tank and exported as a byproduct, realizing the commercial utilization of hydrogen resources and significantly improving the system's economic efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the tail gas treatment system for potassium tert-butoxide and sodium tert-butoxide of the present invention; Figure 2 yes Figure 1 Enlarged diagram of point A in the diagram.

[0019] In the diagram: 1-Reaction vessel, 2-Exhaust valve, 3-Exhaust pipe, 4-First gas detector, 5-First tee fitting, 6-First check valve, 7-First inert gas pipeline, 8-Inert gas storage tank, 9-Inert gas supply pump, 10-Second inert gas pipeline, 11-Second check valve, 12-Second tee fitting, 13-One-way valve, 14-Third branch pipe, 15-Second branch, 16-Buffer tank, 17-Inerting reactor, 18-First branch, 19-Inerting pipeline, 20-Third check valve, 21-Dryer, 22- Condenser, 23-Liquid outlet pipe, 24-Cold liquid tank, 25-Fourth pipeline, 26-Activated carbon adsorption box, 27-Fifth pipeline, 28-Absorption tower, 29-Hydrogen compressor, 30-PSA hydrogen adsorption tower, 31-Vacuum pump, 32-Hydrogen recovery tank, 33-Sixth pipeline, 34-Inlet fan, 35-Hydrogen reactor, 36-Third gas detector, 37-Suction fan, 38-Second gas detector, 39-Waste gas inlet pipe, 40-Third tee fitting, 41-Fourth check valve, 42-Fifth check valve, 43-Sixth check valve. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific examples described herein are merely illustrative and not intended to limit the invention. The directional terms used in the following embodiments, such as up, down, left, right, front, or back, are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for illustrative purposes and not for limiting the invention. Furthermore, in all embodiments, the same reference numerals denote the same elements.

[0021] Please see Figure 1 and Figure 2This invention provides a tail gas treatment system for potassium tert-butoxide and sodium tert-butoxide, comprising several reaction vessels 1, which are located inside a factory building. Each reaction vessel 1 has an exhaust valve 2 at its exhaust port, which is connected to an exhaust pipe 3. The exhaust pipe 3 extends out of the factory building and connects to an outdoor tail gas treatment device. A first gas detector 4 is installed on the portion of the exhaust pipe 3 located inside the factory building. The first gas detector 4 is used to monitor the gas emitted from the reaction vessel 1. A first tee fitting 5 is installed on the exhaust pipe 3. A first check valve 6 is installed at the branch interface of the first tee fitting 5. The outlet of the first check valve 6 is connected to the exhaust pipe 3, and the inlet of the first check valve 6 is connected to the first outlet of an inert gas supply pump 9 via an inert gas first pipeline 7. The inlet of the inert gas supply pump 9 is connected to the outlet of an inert gas storage tank 8.

[0022] As a further explanation of this embodiment, since hydrogen gas is generated during the production of potassium tert-butoxide and sodium tert-butoxide, if air is mixed into the tail gas pipeline and treatment equipment, forming an explosive mixture, the consequences will be severe if the oxygen content increases. The oxygen content in the tail gas generated during the production of potassium tert-butoxide and sodium tert-butoxide is monitored by a first gas detector 4. When the oxygen content is greater than 1.5%, the inert gas supply pump 9 is automatically started by the PLC. The inert gas supply pump 9 draws inert gas from the inert gas storage tank 8 and discharges it into the exhaust pipe 3, thereby reducing the oxygen content.

[0023] The outdoor portion of the exhaust pipe 3 is also equipped with a second three-way fitting 12. A second check valve 11 is installed at the branch interface of the second three-way fitting 12. The inlet end of the second check valve 11 is connected to the exhaust pipe 3, and the outlet end of the second check valve 11 is connected to the first inlet of the inerting reactor 17 via a first branch 18. The inerting reactor 17 is filled with a low-temperature catalytic oxygen-consuming agent, whose low-temperature active component is a Pt / Al2O3 catalyst with a Pt loading of 0.3~0.5wt% and a carrier of spherical γ-Al2O3 with a φ3~5mm diameter and a specific surface area ≥200m² / g. The outlet of the inerting reactor 17 is connected to the inlet of the dryer 21 via an inerting pipe 19. A third check valve 20 is installed at the connection between the inerting pipe 19 and the dryer 21. The inlet end of the third check valve 20 is connected to the inerting pipe 19, and the outlet end of the third check valve 20 is connected to the dryer 21. The outlet of the dryer 21 is connected to the first inlet of the condenser 22 through a heating pipe, and the outlet of the condenser 22 is connected to the cold liquid tank 24 through the outlet pipe 23.

[0024] As a further explanation of this embodiment, when the exhaust gas injected with inert gas passes through the second three-way fitting 12, the second check valve 11 opens, and all of it enters the first branch 18, and then enters the inerting reactor 17. The hydrogen and oxygen in the exhaust gas pass through the low-temperature catalytic oxygen-consuming agent in the inerting reactor 17 and undergo a flameless catalytic reaction: 2H2 + O2 → 2H2O, thereby consuming oxygen and preventing an explosion. The flameless catalytic reaction produces water vapor which mixes into the exhaust gas, and then enters the dryer 21 for drying, and finally enters the condenser 22 to condense and recover the unreacted tert-butanol in the exhaust gas.

[0025] A one-way valve 13 is installed on the main exhaust pipe 3 section where the second three-way fitting 12 is located. A buffer tank 16 is also installed on the main exhaust pipe 3 section. The first air inlet of the buffer tank 16 is connected to the exhaust pipe 3, and the second air inlet of the buffer tank 16 is connected to the second branch 15. A third three-way fitting 40 is installed on the second branch 15. A fourth check valve 41 is installed at the connection between the second branch 15 and the third three-way fitting 40. The outlet of the fourth check valve 41 is connected to the second branch 15, and the inlet of the fourth check valve 41 is connected to the third three-way fitting 40.

[0026] The branch interface of the third tee fitting 40 is equipped with a fifth check valve 42. The inlet end of the fifth check valve 42 is connected to the third tee fitting 40, and the outlet end of the fifth check valve 42 is connected to the second inlet of the inerting reactor 17 through the third branch pipe 14.

[0027] The third three-way fitting 40 is also connected to the exhaust gas inlet pipe 39. An inert gas second pipeline 10 is provided on the exhaust gas inlet pipe 39. A sixth check valve 43 is provided at the connection between the exhaust gas inlet pipe 39 and the inert gas second pipeline 10. The outlet end of the sixth check valve 43 is connected to the exhaust gas inlet pipe 39, and the inlet end of the sixth check valve 43 is connected to the inert gas second pipeline 10. The inert gas second pipeline 10 is connected to the second outlet end of the inert gas supply pump 9.

[0028] An intake fan 37 is installed at the end of the exhaust gas inlet pipe 39, and a filter screen is installed at the intake end of the intake fan 37. A Venturi tube section is installed between the second inert gas pipeline 10 and the intake fan 37 on the exhaust gas inlet pipe 39. After the intake fan 37 draws accidentally leaked exhaust gas from the plant into the exhaust gas inlet pipe 39, the Venturi tube section accelerates its transport. A second gas detector 38 is installed between the intake fan 37 and the Venturi tube section on the exhaust gas inlet pipe 39. A third gas detector 36 is installed inside the plant to monitor the gases inside the plant.

[0029] As a further explanation of this embodiment, the third gas detector 36 can monitor the gas in the plant for abnormalities. When potassium tert-butoxide and sodium tert-butoxide tail gases are detected in the gas, the PLC automatically and quickly starts the suction fan 37, which draws the gas into the exhaust gas inlet pipe 39. Then, the second gas detector 38 monitors the oxygen content. When the oxygen content in the mixed gas is greater than 1.5%, the PLC automatically opens the sixth check valve 43 and starts the inert gas supply pump 9 to inject nitrogen into the pipeline. At the same time, the fourth check valve 41 closes and the fifth check valve 42 opens, allowing the mixed gas to enter the third branch pipe 14. Through the inerting reactor 17, the oxygen and hydrogen in the mixed gas undergo a flameless catalytic reaction on the surface of the low-temperature catalytic oxygen-consuming agent, thereby consuming the oxygen content. The mixed gas obtained after the reaction enters the dryer 21 to remove water vapor, and then enters the condenser 22 to condense and recover unreacted tert-butanol.

[0030] The outlet of condenser 22 is connected to the inlet of activated carbon adsorption box 26 via a fourth pipe 25. The outlet of activated carbon adsorption box 26 is connected to the inlet of the lower side of absorption tower 28 via a fifth pipe 27. Water is sprayed downwards from the top of absorption tower 28 to absorb residual tert-butanol. The outlet of the top of absorption tower 28 is connected to the inlet of hydrogen compressor 29, which provides the required pressure for the connected PSA hydrogen unit, where PSA refers to pressure swing adsorption. The outlet of hydrogen compressor 29 is connected to PSA hydrogen adsorption tower 30 of the PSA hydrogen unit, which contains an adsorbent bed. A hydrogen pipeline is installed at the top of PSA hydrogen adsorption tower 30, connecting to hydrogen recovery tank 32.

[0031] The PSA hydrogen adsorption tower 30 is also connected to a vacuum pump 31. The outlet of the PSA hydrogen adsorption tower 30 is connected to a hydrogen reactor 35 via a sixth pipe 33. The hydrogen reactor 35 is filled with the same low-temperature catalytic oxygen-consuming agent as the inerting reactor 17. The hydrogen reactor 35 is also connected to an inlet fan 34 to ensure sufficient oxygen supply for the hydrogen to react completely. The outlet of the hydrogen reactor 35 is connected to the atmosphere.

[0032] The working principle and usage process of this embodiment are as follows: The tail gas (containing hydrogen, tert-butanol gas, and trace amounts of alkaline mist) generated during the production of potassium tert-butoxide and sodium tert-butoxide in reactor 1 flows from the exhaust port of each reactor 1 through exhaust valve 2 into exhaust pipe 3. Exhaust pipe 3 passes through the factory wall and leads to the outside. The first gas detector 4, installed on the section of exhaust pipe 3 inside the factory building, continuously monitors the oxygen content in the tail gas. When the detected oxygen content is ≤1.5%, the PLC determines it to be a safe operating condition, the inert gas supply pump 9 does not start, and the first check valve 6 remains closed, preventing the injection of inert gas into exhaust pipe 3.

[0033] The exhaust gas flows normally along the main exhaust pipe 3. The second check valve 11 at the second tee fitting 12 is closed, and the fourth check valve 41 and the fifth check valve 42 on the second branch 15 also remain closed. All the exhaust gas enters the buffer tank 16. The exhaust gas entering the buffer tank 16 eliminates pressure pulsations and provides a stable airflow for downstream treatment equipment.

[0034] The tail gas from the outlet of buffer tank 16 enters condenser 22. The tert-butanol gas in the tail gas is condensed into liquid and flows through outlet pipe 23 into cold liquid tank 24 for collection. It can be directly returned to the production system for reuse or used as a recovery solvent. The non-condensable gas from the outlet of condenser 22, mainly containing hydrogen and trace amounts of uncondensed tert-butanol, enters activated carbon adsorption box 26 through fourth pipe 25. The activated carbon adsorbs residual trace amounts of tert-butanol, protecting downstream equipment. The gas after activated carbon adsorption enters from the bottom of absorption tower 28 through fifth pipe 27. Water is sprayed downwards from the top of absorption tower 28, and the gas comes into countercurrent contact with the water, further removing any possible residual trace amounts of tert-butanol. The washing liquid is periodically discharged into the distillation recovery section.

[0035] The hydrogen-rich gas discharged from the top outlet of the absorber 28 enters the hydrogen compressor 29, which pressurizes the gas to the operating pressure required by the PSA hydrogen unit. The pressurized gas then enters the PSA hydrogen adsorption tower 30.

[0036] Inside the PSA hydrogen adsorption tower 30, the composite adsorbent bed preferentially adsorbs residual impurities such as trace amounts of moisture, organic matter, and possible nitrogen under high pressure. Hydrogen, as a difficult-to-adsorb component, flows out from the top of the tower and enters the hydrogen recovery tank 32 for storage or external transportation via the fifth branch pipe. The tail gas discharged from the PSA hydrogen adsorption tower 30 during the desorption stage (containing trace amounts of hydrogen and desorbed impurities) enters the hydrogen reactor 35 via the sixth pipeline 33. Inside the hydrogen reactor 35, the low-temperature catalytic oxygen-consuming agent, under the condition of sufficient oxygen provided by the inlet fan 34, flamelessly catalytically oxidizes the residual hydrogen in the desorbed gas into water vapor, ensuring that no hydrogen is directly discharged into the atmosphere, and the treated gas is safely discharged.

[0037] The above are merely preferred embodiments of the present invention. The scope of protection of the present invention is not limited to the above-described embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A tail gas treatment system for potassium tert-butoxide and sodium tert-butoxide, characterized in that, include: Several reaction vessels (1), the exhaust port of the reaction vessel (1) is connected to the tail gas treatment equipment through the exhaust pipe (3), the exhaust pipe (3) is equipped with a first gas detector (4), the exhaust pipe (3) is also equipped with a first three-way fitting (5), the branch interface of the first three-way fitting (5) is equipped with a first check valve (6), the inlet end of the first check valve (6) is connected to an inert gas source; The exhaust pipe (3) is also provided with a second three-way fitting (12). A one-way valve (13) is provided at the main interface of the second three-way fitting (12). The one-way valve (13) is connected to the air inlet of the condenser (22). A second check valve (11) is provided at the branch interface of the second three-way fitting (12). The air outlet of the second check valve (11) is connected to the inerting reactor (17). The inerting reactor (17) is filled with a low-temperature catalytic oxygen-consuming agent. The air outlet of the inerting reactor (17) is connected to the air inlet of the dryer (21). The air outlet of the dryer (21) is connected to the air inlet of the condenser (22). The liquid outlet of the condenser (22) is connected to the cold liquid tank (24) through the liquid outlet pipe (23). The outlet of the condenser (22) is connected to the activated carbon adsorption box (26), the activated carbon adsorption box (26) is connected to the absorption tower (28), the absorption tower (28) is connected to the inlet of the hydrogen compressor (29), the outlet of the hydrogen compressor (29) is connected to the PSA hydrogen unit for recovering hydrogen, the outlet of the PSA hydrogen unit is connected to the hydrogen reactor (35), and the outlet of the hydrogen reactor (35) is connected to the atmosphere. It also includes a third gas detector (36) installed in the factory building and an exhaust fan (37) connected to the factory building. The exhaust fan (37) is installed in the exhaust gas inlet pipe (39). A second gas detector (38) is installed on the side of the exhaust gas inlet pipe (39) near the exhaust fan (37). The exhaust gas inlet pipe (39) is also connected to an inert gas second pipeline (10) equipped with a sixth check valve (43). The inlet end of the sixth check valve (43) is connected to the inert gas second pipeline (10). Pipeline (10) is connected to an inert gas source. A third three-way fitting (40) is provided on the exhaust gas inlet pipe (39). A fourth check valve (41) is provided at the main interface of the third three-way fitting (40). The outlet of the fourth check valve (41) is connected to the inlet of the condenser (22). A fifth check valve (42) is provided at the branch interface of the third three-way fitting (40). The outlet of the fifth check valve (42) is connected to the inerting reactor (17). The inert gas source includes an inert gas storage tank (8), the outlet of which is connected to an inert gas supply pump (9), and the outlet of which is connected to a branch of the second inert gas pipeline (10) and the first tee fitting (5). The first gas detector (4) monitors the oxygen content in the tail gas produced by the production of potassium tert-butoxide and sodium tert-butoxide. When the oxygen content is greater than 1.5%, the inert gas supply pump (9) is automatically started by the PLC. The inert gas supply pump (9) draws inert gas from the inert gas storage tank (8) and discharges it into the exhaust pipe (3) to reduce the oxygen content.

2. The potassium tert-butoxide and sodium tert-butoxide tail gas treatment system according to claim 1, characterized in that, The intake end of the air intake fan (37) is equipped with a filter screen.

3. The potassium tert-butoxide and sodium tert-butoxide tail gas treatment system according to claim 1, characterized in that, A buffer tank (16) is provided between the second three-way fitting (12) and the condenser (22) connecting pipe. The outlet of the fourth check valve (41) is first connected to the buffer tank (16) and then enters the inlet of the condenser (22).

4. The potassium tert-butoxide and sodium tert-butoxide tail gas treatment system according to claim 1, characterized in that, A Venturi tube section is provided between the second gas detector (38) of the exhaust gas inlet pipe (39) and the second inert gas pipeline (10) to accelerate the transport of leaked exhaust gas.

5. The potassium tert-butoxide and sodium tert-butoxide tail gas treatment system according to claim 1, characterized in that, The PSA hydrogen unit includes a PSA hydrogen adsorption tower (30) with an adsorbent bed inside. The PSA hydrogen adsorption tower (30) is connected to the outlet of a hydrogen compressor (29). The PSA hydrogen adsorption tower (30) is also connected to a vacuum pump (31). The top of the PSA hydrogen adsorption tower (30) is connected to a hydrogen recovery tank (32).

6. The potassium tert-butoxide and sodium tert-butoxide tail gas treatment system according to claim 1, characterized in that, The low-temperature catalytic oxygen depleting agent has a Pt / Al2O3 catalyst as its active component, with a Pt loading of 0.3~0.5wt% and a spherical γ-Al2O3 support of φ3~5mm with a specific surface area ≥200m2 / g.

7. The potassium tert-butoxide and sodium tert-butoxide tail gas treatment system according to claim 6, characterized in that, The hydrogen reactor (35) is filled with the same low-temperature catalytic oxygen-consuming agent as the inerting reactor (17). The hydrogen reactor (35) is also connected to the air intake fan (34) to provide the oxygen required for the reaction and ensure that the hydrogen reacts fully.

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