Tail gas treatment equipment for sodium cyanoborohydride reduction

Abstract

The utility model discloses tail gas treatment equipment for reducing sodium cyanoborohydride, and relates to the technical field of tail gas treatment. The tail gas treatment equipment comprises a condenser and a reaction tank. The condenser is provided with a first air inlet and a liquid outlet, the first air inlet is communicated with the first air outlet of the reaction kettle through a first pipeline, and the liquid outlet is communicated with the reflux inlet of the reaction kettle through a second pipeline; the reaction tank is filled with a reaction solution, a second air inlet and a second air outlet are formed in the reaction tank, the liquid outlet is communicated with the second air inlet through a third pipeline, and the third pipeline is immersed in the reaction solution of the reaction tank; according to the tail gas treatment equipment provided by the utility model, harmful substances in the reaction kettle can be cooled, liquefied and refluxed into the reaction kettle through the condenser, and residual gas enters the reaction tank for reaction and is finally discharged from the second gas outlet of the reaction tank, so that the harmful substances generated in chemical reaction are effectively discharged into the atmosphere, and the environment is protected. And the harm to the environment and human bodies is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of tail gas treatment, in particular to tail gas treatment equipment used for sodium cyanoborohydride reduction. Background Art

[0002] In the chemical production process, the reduction reaction of sodium cyanoborohydride using a reactor is a crucial step. However, this process inevitably produces some by-products, including cyanic acid and hydrogen. Among them, cyanic acid (chemical formula HCNO) is a very toxic gas that is extremely harmful to the human body. Even trace exposure can cause serious health problems or even be fatal. Therefore, the treatment of cyanic acid must be carried out by designing a precise, efficient and reliable absorption system to ensure that it is completely absorbed and converted into harmless substances to prevent it from leaking into the environment or causing harm to the human body.

[0003] On the other hand, hydrogen, as a light, colorless, odorless gas, is highly flammable and explosive. In chemical production, the safe handling of hydrogen is also crucial. Any negligence may cause fire or explosion accidents, posing a serious threat to production equipment and personnel safety. Therefore, when handling hydrogen, not only strict safety measures need to be taken, such as using explosion-proof equipment and maintaining good ventilation in the operating area, but also professional safety training for operators is required to improve their safety awareness and emergency response capabilities.

[0004] However, in the existing treatment technology, the harmless treatment of cyanic acid and hydrogen often faces some challenges. Due to the special chemical properties of these two substances, it is relatively difficult to handle them, and it is easy to have problems with incomplete treatment. Once improperly handled, these harmful substances may remain in the waste gas or wastewater, causing damage or pollution to human health or the environment. Therefore, how to improve the existing treatment technology and improve the harmless treatment efficiency of cyanic acid and hydrogen is an important problem that needs to be solved in current chemical production. Utility Model Content

[0005] In view of this, the purpose of the utility model is to overcome the deficiencies in the related art. The utility model provides an exhaust gas treatment device for sodium cyanoborohydride reduction.

[0006] The utility model provides the following technical solutions:

[0007] A tail gas treatment device for sodium cyanoborohydride reduction comprises a condenser and a reaction tank.

[0008] The condenser has a first air inlet and a liquid outlet, the first air inlet is connected to the first air outlet of the reactor through a first pipe, and the liquid outlet is connected to the reflux port of the reactor through a second pipe; the reaction tank is filled with a reaction solution, and the reaction tank is provided with a second air inlet and a second air outlet, the liquid outlet is connected to the second air inlet through a third pipe, and the end of the third pipe away from the liquid outlet is immersed in the reaction solution of the reaction tank; the second air outlet is connected to the outside atmosphere.

[0009] The reaction tank is provided with a spray pipe, one end of the spray pipe is communicated with the bottom end of the reaction tank, the other end of the spray pipe is communicated with the top of the reaction tank, and a circulation pump is provided on the spray pipe.

[0010] As a further improvement of the above technical solution, the end of the spray pipe connected to the top of the reaction tank extends to the top of the cavity of the reaction tank, and a spray ball is installed at the end of the spray pipe located in the reaction tank.

[0011] As a further improvement of the above technical solution, a gas-liquid separator is connected to the liquid outlet, the liquid outlet end of the gas-liquid separator is connected to the second pipeline, and the gas outlet end of the gas-liquid separator is connected to the third pipeline.

[0012] As a further improvement of the above technical solution, a U-shaped portion is provided on the second pipe, and the U-shaped portion is used to form a liquid sealing structure.

[0013] As a further improvement of the above technical solution, a sewage outlet is provided at the bottom of the U-shaped portion.

[0014] As a further improvement of the above technical solution, the tail gas treatment equipment also includes a receiving tank, and a receiving port of the receiving tank is connected to the liquid outlet end of the gas-liquid separator through a fourth pipeline.

[0015] As a further improvement of the above technical solution, the second air outlet is externally connected to an exhaust pipe, and the air outlet end of the exhaust pipe extends upward and is located at the top of the entire device.

[0016] As a further improvement of the above technical solution, a flame arrester is installed on the exhaust pipe.

[0017] As a further improvement of the above technical solution, the outlet end of the exhaust pipe has a bent portion, and the bent portion is in an inverted U shape.

[0018] Compared with the related art, the beneficial effects of the utility model are:

[0019] The tail gas treatment equipment for sodium cyanoborohydride reduction provided by the utility model shows its efficient treatment ability in the process of sodium cyanoborohydride reduction reaction through the reactor. Specifically, when the sodium cyanoborohydride reduction reaction is carried out inside the reactor, harmful gases including cyanic acid and hydrogen will be generated. These gases can be discharged from the first gas outlet of the reactor, and then enter the condenser through the first gas inlet along the preset first pipeline, and inside the condenser, these gases will undergo condensation and liquefaction treatment.

[0020] During the condensation process, the cyanic acid gas is liquefied due to the decrease in temperature, and the liquefied cyanic acid can then be discharged smoothly from the liquid outlet of the condenser. Next, the liquefied cyanic acid will pass through the second pipe and return to the reactor through the reflux port, so that it can continue to participate in the reaction, realizing the effective utilization and circulation of resources. At the same time, the mixture of cyanic acid and hydrogen that is not completely liquefied during the condensation process will be discharged together from the liquid outlet of the condenser. This part of the mixed gas will then escape and flow along the third pipe, and finally enter the reactor through the second air inlet of the reactor.

[0021] In the reaction tank, these mixed gases will come into contact with the reaction solution in the tank for reaction. In this process, the cyanic acid in the mixed gas will react chemically with the reaction solution and be further processed; at the same time, through the suction action of the circulating pump, the reaction solution rich in reactants at the bottom of the reaction tank can be sucked up, and then pressurized and pushed to the top of the reaction tank through the spray pipe. At the top, these solutions will be sprayed into the cavity of the reaction tank to form a layer of solution droplets. This design allows the cyanic acid that enters the reaction tank for the initial chemical reaction with the reaction solution to escape from the reaction solution due to incomplete reaction. They can immediately have a secondary contact with the reaction solution droplets floating in the cavity of the reaction tank, and then a secondary reaction will occur.

[0022] This secondary reaction not only greatly improves the reaction efficiency of cyanic acid, ensuring that more cyanic acid can be effectively converted, but also further improves the working effect of the entire reaction tank. The hydrogen that cannot react with the reaction solution will overflow from the reaction solution and eventually be safely discharged into the atmosphere through the second gas outlet of the reaction tank.

[0023] Through the above series of treatment processes, the tail gas treatment equipment of the utility model can effectively reflux and harmlessly treat the cyanic acid in the harmful gas generated by the sodium cyanoborohydride reduction reaction, and realize the centralized and unified emission of hydrogen. This treatment method not only significantly reduces the pollution degree of harmful gases to the environment, but also effectively avoids the possible harm of these gases to the human body, thereby greatly improving the safety and environmental protection of the reactor during the sodium cyanoborohydride reduction reaction.

[0024] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 A schematic diagram of the structure of a tail gas treatment device for sodium cyanoborohydride reduction in one embodiment of the utility model is shown from one perspective;

[0027] Figure 2 A schematic structural diagram of a reaction tank from one perspective in an embodiment of the utility model is shown.

[0028] Description of main component symbols:

[0029] 100-condenser; 110-first air inlet; 120-liquid outlet; 130-first pipeline; 140-second pipeline; 141-U-shaped portion; 142-drain outlet; 200-reactor; 210-first air outlet; 220-reflux port; 300-reaction tank; 310-second air inlet; 320-second air outlet; 330-third pipeline; 340-spray pipe; 341-circulation pump; 350-exhaust pipe; 351-flame arrester; 352-bend; 400-gas-liquid separator; 500-receiving tank; 510-fourth pipeline. DETAILED DESCRIPTION

[0030] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0033] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0035] like Figure 1 As shown, an embodiment of the utility model provides a tail gas treatment device for sodium cyanoborohydride reduction, and the tail gas treatment device includes a condenser 100 and a reaction tank 300.

[0036] The condenser 100 has a first air inlet 110 and a liquid outlet 120, wherein the first air inlet 110 is located at the top of the condenser 100, and the liquid outlet 120 is located at the bottom of the condenser 100; the first air inlet 110 is connected to the first air outlet 210 of the reactor 200 through a first pipe 130, and the liquid outlet 120 is connected to the reflux port 220 of the reactor 200 through a second pipe 140; the reaction tank 300 is filled with a reaction solution, and the reaction tank 300 is filled with a reaction solution. 00 is provided with a second air inlet 310 and a second air outlet 320, the liquid outlet 120 is connected to the second air inlet 310 through a third pipe 330, and the end of the third pipe 330 away from the liquid outlet 120 is immersed in the reaction solution of the reaction tank 300, and the second air outlet 320 is connected to the outside atmosphere; the setting position of the reaction tank 300 is higher than the setting height of the reactor 200 to prevent liquid from flowing into the reaction tank 300, thereby improving the use efficiency of this embodiment. The reaction tank 300 is provided with a spray pipe 340, one end of which is connected to the bottom end of the reaction tank 300, and the other end of which is connected to the top of the reaction tank 300, and a circulating pump 341 is provided on the spray pipe 340.

[0037] In the tail gas treatment device provided in this embodiment, when the reduction reaction of sodium cyanoborohydride is carried out in the reactor 200, harmful gases including cyanic acid and hydrogen are generated. These gases can be discharged from the first gas outlet 210 of the reactor 200, and then enter the condenser 100 through the first gas inlet 110 along the preset first pipeline 130, and these gases will undergo condensation and liquefaction treatment inside the condenser 100.

[0038] During the condensation process, the cyanic acid gas is liquefied due to the decrease in temperature, and the liquefied cyanic acid can then be smoothly discharged from the liquid outlet 120 of the condenser 100. Next, the liquefied cyanic acid will pass through the second pipe 140 and return to the reactor 200 through the reflux port 220, so that it can continue to participate in the reaction. At the same time, the mixture of cyanic acid and hydrogen that is not completely liquefied during the condensation process will be discharged together from the liquid outlet 120 of the condenser 100. This part of the mixed gas will then escape and flow along the third pipe 330, and finally enter the interior of the reactor 300 through the second air inlet 310 of the reactor 300.

[0039] In the reaction tank 300, these mixed gases will react with the reaction solution in the tank. In this process, the cyanic acid in the mixed gas will react chemically with the reaction solution, so as to be further processed; at the same time, under the suction action of the circulating pump 341, the reaction solution rich in reactants at the bottom of the reaction tank 300 can be sucked up, and then it is pressurized and pushed to the top of the reaction tank 300 through the spray pipe 340. At the top, these solutions will be sprayed to the cavity part of the reaction tank 300 to form a layer of solution droplets. Such a design allows the cyanic acid that enters the reaction tank 300 to react with the reaction solution for the first time, if it escapes from the reaction solution due to incomplete reaction, it can immediately contact with the reaction solution droplets floating in the cavity of the reaction tank 300 for a second time, and then a secondary reaction occurs. And those hydrogen gases that cannot react with the reaction solution will overflow from the reaction solution and eventually be discharged into the atmosphere through the second gas outlet 320 of the reaction tank 300.

[0040] This secondary reaction not only greatly improves the reaction treatment efficiency of cyanic acid, ensuring that more cyanic acid can be effectively converted, but also further improves the working effect of the entire reaction tank 300. Through such a clever design, this embodiment not only achieves deep treatment of harmful gases, but also significantly improves resource utilization, making the entire treatment process more environmentally friendly and efficient.

[0041] like Figure 2 As shown, in some specific embodiments, the end of the spray pipe 340 connected to the top of the reaction tank 300 extends to the top of the cavity of the reaction tank 300, and the end of the spray pipe 340 located in the reaction tank 300 is equipped with a spray ball, and the surface of the spray ball is covered with tiny and uniform spray holes. When the reaction solution is transported to the spray ball through the spray pipe 340, the solution will accumulate inside the spray ball and be subjected to a certain pressure, and then be evenly sprayed out in the form of mist through the spray holes on its surface. Such a spraying method greatly improves the spraying uniformity of the reaction solution in the cavity of the reaction tank 300, so that the reaction solution can cover every corner of the reaction tank 300, ensuring that there is enough solution in each place to contact and react with the cyanic acid that may escape.

[0042] In some specific embodiments, the main solute components of the reaction solution in the reaction tank 300 include sodium hydroxide (NaOH) and sodium hypochlorite (NaClO), and these two chemical substances play a vital role in the waste gas treatment process.

[0043] Sodium hydroxide, as a strong base, can absorb cyanic acid to produce non-toxic sodium cyanide (NaCN). The reaction equation is as follows: HCNO+NaOH→NaCN+H2O; the absorbed solution can be further processed or safely discharged. Sodium hypochlorite, on the other hand, is known for its strong oxidizing properties and can oxidize cyanide to non-toxic cyanate. The reaction equation is as follows: NaCN+NaClO→NaCNO+NaCl; cyanate (NaCNO) is much less toxic than cyanide and can be further processed or discharged.

[0044] The proportion of the reaction solution can be flexibly adjusted according to different usage scenarios and waste gas components. For example, in some waste gas treatment tasks, a higher alkaline environment may be required to neutralize the acidic components in the waste gas. In this case, the reaction solution can be configured as 30% sodium hydroxide and 10% sodium hypochlorite. In other scenarios, if the organic pollutant content in the waste gas is high, a stronger oxidizing ability is required to decompose it. In this case, the reaction solution can be configured as 10% sodium hydroxide and 20% sodium hypochlorite.

[0045] In some specific embodiments, a gas-liquid separator 400 is connected to the liquid outlet 120, the liquid outlet end of the gas-liquid separator 400 is connected to the second pipeline 140, and the gas outlet end of the gas-liquid separator 400 is connected to the third pipeline 330, so as to limit the flow direction of the gas or liquid discharged from the liquid outlet 120, thereby improving the waste gas treatment efficiency of this embodiment.

[0046] In some specific embodiments, a U-shaped portion 141 is provided on the second pipe 140, and the U-shaped portion 141 is used to form a liquid sealing structure to further prevent the mixed gas discharged from the liquid outlet 120 from flowing back into the reactor 200 through the second pipe 140, thereby further improving the efficiency of waste gas treatment in this embodiment.

[0047] In some specific embodiments, a drain outlet 142 is provided at the bottom of the U-shaped portion 141. By regularly opening and closing the valve port of the drain outlet 142, it is convenient to regularly discharge the liquid and precipitated impurities in the U-shaped portion 141, and it is also convenient to empty the residual liquid in the second pipe 140 after the reactor 200 stops working.

[0048] In some specific embodiments, the exhaust gas treatment equipment also includes a receiving tank 500, and the receiving port of the receiving tank 500 is connected to the liquid outlet end of the gas-liquid separator 400 through a fourth pipe 510, so that when too much liquid is discharged from the condenser 100, the valve on the fourth pipe 510 is opened by closing the valve on the second pipe 140, so that the liquid discharged from the liquid outlet 120 can be received and temporarily stored, thereby ensuring the normal and reliable use of the reactor 200 and the present embodiment.

[0049] In some specific embodiments, the second gas outlet 320 is externally connected to an exhaust pipe 350, and the gas outlet end of the exhaust pipe 350 extends upward and is located at the top of the entire device; by raising the gas outlet end of the exhaust pipe 350, it is possible to effectively prevent the gas discharged from the exhaust pipe 350 from directly contacting the human body or the surrounding environment. This design principle is based on a simple physical phenomenon: hot gas will naturally rise and move away from the ground due to its low density. Therefore, setting the gas outlet end of the exhaust pipe 350 at the top of the device can ensure that the exhaust gas can quickly move away from the human activity area and the ground during the discharge process, thereby reducing the risk of harm to the human body.

[0050] In addition, raising the outlet end of the exhaust pipe 350 can help the exhaust gas to diffuse better into the atmosphere, further reduce the local concentration, and reduce potential pollution to the surrounding environment.

[0051] In some specific embodiments, a flame arrester 351 is installed on the exhaust pipe 350; the design principle of the flame arrester 351 is that it can effectively prevent the propagation of flames or explosion waves in the gas pipeline. In industrial production processes, especially when hydrogen is involved, the risk of hydrogen combustion or explosion cannot be ignored. Once hydrogen accumulates in the pipeline and reaches a certain concentration and temperature conditions, it may cause combustion or explosion accidents, posing a serious threat to equipment and personnel safety.

[0052] By installing a flame arrester 351 on the exhaust pipe 350, this risk can be effectively reduced. The flame arrester 351 uses special structural materials and technologies inside, which can quickly absorb the energy of the flame or explosion wave when it propagates to the flame arrester 351, and convert it into heat energy or other harmless forms, thereby preventing the further propagation of the flame or explosion wave. In this way, even if the hydrogen concentration in the exhaust pipe 350 is high, no combustion or explosion accident will occur due to accidental ignition, thereby greatly improving the working safety of this embodiment.

[0053] In some specific embodiments, the outlet end of the exhaust pipe 350 has a bend 352, and the bend 352 is in an inverted U shape; the inverted U-shaped bend 352 plays a multiple protective role in function. First, it can effectively prevent rainwater or other foreign matter from entering the exhaust pipe 350. In practical applications, the exhaust pipe 350 is often exposed to the outdoor environment and is easily affected by various weather conditions. Especially on rainy days, if the outlet end of the exhaust pipe 350 is directly exposed to the outside, rainwater may flow into the pipe, causing corrosion or blockage to the inside of the pipe. The inverted U-shaped bend 352 can form a natural barrier to guide rainwater to the outside of the pipe, thereby avoiding this problem.

[0054] Secondly, the inverted U-shaped bend 352 can also prevent other foreign objects, such as leaves, dust, etc., from entering the exhaust pipe 350. Once these foreign objects enter the pipe, they may affect the normal discharge of gas and even cause the pipe to be blocked. The existence of the bend 352 can greatly reduce this risk and ensure that the exhaust pipe 350 is continuously unobstructed.

[0055] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0056] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A tail gas treatment device for sodium cyanoborohydride reduction, characterized in that: include: A condenser (100), the condenser (100) having a first air inlet (110) and a liquid outlet (120), the first air inlet (110) being connected to a first air outlet (210) of a reaction kettle (200) via a first pipe (130), and the liquid outlet (120) being connected to a reflux port (220) of the reaction kettle (200) via a second pipe (140); A reaction tank (300), wherein the reaction tank (300) is filled with a reaction solution, and the reaction tank (300) is provided with a second air inlet (310) and a second air outlet (320); the liquid outlet (120) is connected to the second air inlet (310) via a third pipe (330), and an end of the third pipe (330) away from the liquid outlet (120) is immersed in the reaction solution in the reaction tank (300); and the second air outlet (320) is connected to the outside atmosphere; The reaction tank (300) is provided with a spray pipe (340), one end of the spray pipe (340) is connected to the bottom end of the reaction tank (300), and the other end of the spray pipe (340) is connected to the top of the reaction tank (300), and the spray pipe (340) is provided with a circulation pump (341).

2. The tail gas treatment equipment for sodium cyanoborohydride reduction according to claim 1, characterized in that: The end of the spray pipe (340) communicating with the top of the reaction tank (300) extends to the top of the cavity of the reaction tank (300), and a spray ball is installed at the end of the spray pipe (340) located in the reaction tank (300).

3. The tail gas treatment equipment for sodium cyanoborohydride reduction according to claim 1, characterized in that: A gas-liquid separator (400) is connected to the liquid outlet (120); a liquid outlet end of the gas-liquid separator (400) is in communication with the second pipeline (140); and a gas outlet end of the gas-liquid separator (400) is in communication with the third pipeline (330).

4. The tail gas treatment equipment for sodium cyanoborohydride reduction according to claim 3, characterized in that: The second pipe (140) is provided with a U-shaped portion (141), and the U-shaped portion (141) is used to form a liquid sealing structure.

5. The tail gas treatment equipment for sodium cyanoborohydride reduction according to claim 4, characterized in that: A sewage outlet (142) is provided at the bottom of the U-shaped portion (141).

6. The tail gas treatment equipment for sodium cyanoborohydride reduction according to claim 4, characterized in that: The tail gas treatment equipment further comprises a receiving tank (500), wherein a receiving port of the receiving tank (500) is connected to a liquid outlet end of the gas-liquid separator (400) via a fourth pipeline (510).

7. The tail gas treatment equipment for sodium cyanoborohydride reduction according to any one of claims 1 to 6, characterized in that: The second air outlet (320) is externally connected to an exhaust pipe (350), and the air outlet end of the exhaust pipe (350) extends upward and is located at the top of the entire device.

8. The tail gas treatment equipment for sodium cyanoborohydride reduction according to claim 7, characterized in that: The exhaust pipe (350) is provided with a flame arrester (351).

9. The tail gas treatment equipment for sodium cyanoborohydride reduction according to claim 7, characterized in that: The exhaust pipe (350) has a bent portion (352) at the exhaust end, and the bent portion (352) is in an inverted U shape.

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