Method and apparatus for oxidizing hydrazine and hydroxylamine in 1BP feed liquid

Abstract

The invention relates to the technical field of nuclear fuel treatment, and discloses a method and equipment for oxidizing hydrazine and hydroxylamine in 1BP feed liquid, on the premise that nitrogen oxide is continuously introduced into a reaction container, the 1BP feed liquid firstly circulates in the reaction container at the required speed of 50%, so that the reaction time of the nitrogen oxide and water in the 1BP feed liquid is prolonged, and the nitrogen oxide and the water in the 1BP feed liquid are continuously introduced into the reaction container; according to the present invention, the reaction container is heated to a temperature of 42 DEG C or above, such that the generation amount of nitrous acid is increased, such that the generated nitrous acid can completely oxidize hydroxylamine and hydrazine in the 1BP material liquid so as to release more heat to increase the temperature in the reaction container, and after the temperature in the reaction container rises to 42 DEG C or exceeds 42 DEG C and is stabilized for 15 min, the reaction is stopped; and hydroxylamine and nitric acid in the 1BP feed liquid can be subjected to an autocatalytic reaction to generate nitrous acid. Then the 1BP feed liquid flows in the reaction container at the required speed of 100%, and under the temperature environment at the moment, hydroxylamine and nitric acid in the 1BP feed liquid are subjected to an autocatalytic reaction to generate nitrous acid, so that the nitrous acid in the reaction container is sufficient to completely oxidize hydroxylamine and hydrazine in the 1BP feed liquid.

Description

Technical Field

[0001] This application relates to the technical field of nuclear fuel processing, and particularly to a method and device for oxidizing hydrazine and hydroxylamine in 1BP feed solution. Background Art

[0002] Currently, the most widely used and mature nuclear fuel reprocessing process flow is the Purex process. It includes the front-end treatment process of spent fuel, the chemical separation and purification process, and the tail-end treatment process. 1BP feed solution refers to the plutonium-containing solution obtained after the first extraction and the first back-extraction in the Purex process. The 1BP feed solution contains trivalent plutonium (Pu(III)), hydrazine (N2H4), hydroxylamine (NH2OH), and nitric acid, etc. Among them, during the purification process, the valence of trivalent plutonium in the 1BP feed solution is adjusted, and the hydrazine and hydroxylamine in the 1BP feed solution are oxidized.

[0003] In the prior art, nitrogen oxides (NO2) are often used to oxidize trivalent plutonium, hydrazine, and hydroxylamine in the 1BP feed solution. The principle is to introduce nitrogen oxides into the 1BP feed solution. A part of the nitrogen oxides acts as an oxidant to oxidize trivalent plutonium to tetravalent plutonium (Pu(IV)). Another part of the nitrogen oxides reacts with water in the 1BP feed solution to generate nitrous acid, and the generated nitrous acid acts as an oxidant to oxidize hydrazine and hydroxylamine.

[0004] To improve the efficiency, nitrogen oxides are often continuously introduced into the flowing 1BP feed solution. So that the 1BP feed solution reacts with nitrogen oxides during the flowing process and then directly discharges the material. However, within the reaction time, the nitrous acid generated by the reaction of nitrogen oxides with water in the 1BP feed solution is limited, and the reducibility of hydroxylamine is stronger than that of hydrazine. This leads to that after hydroxylamine is completely oxidized by nitrous acid within the reaction time, the remaining amount may not be sufficient to completely oxidize hydrazine, and finally results in incomplete oxidation of hydrazine in the discharged feed solution.

[0005] Therefore, how to solve or improve the problem of incomplete oxidation of hydrazine when using nitrogen oxides to oxidize hydrazine and hydroxylamine in the 1BP feed solution has become an important technical problem to be solved by those skilled in the art. Summary of the Invention

[0006] In view of this, this application provides a method for oxidizing hydrazine and hydroxylamine in 1BP feed solution to solve or improve the problem of incomplete oxidation of hydroxylamine when using nitrogen oxides to oxidize hydrazine and hydroxylamine in 1BP feed solution.

[0007] In the first aspect, this application provides a method for oxidizing hydrazine and hydroxylamine in 1BP feed solution, including:

[0008] Continuously introduce nitrogen oxides into the reaction vessel;

[0009] Circulate 50% of the 1BP feed solution at the required speed in the reaction vessel;

[0010] Determine that the temperature in the reaction vessel is not less than 42 degrees Celsius;

[0011] Circulate the 1BP liquid material at 100% of the required speed in the reaction vessel.

[0012] Optionally, before continuously introducing nitrogen oxides into the reaction vessel, first fill the reaction vessel with the 1BP liquid material.

[0013] Optionally, after continuously introducing nitrogen oxides into the reaction vessel, first determine that the temperature in the reaction vessel is greater than 42 degrees Celsius, and then circulate the 1BP liquid material at 50% of the preset speed in the reaction vessel.

[0014] Optionally, detect the temperature in the reaction vessel 10 - 15 minutes after continuously introducing nitrogen oxides into the reaction vessel.

[0015] Optionally, when continuously introducing nitrogen oxides into the reaction vessel, control the flow rate of the introduced nitrogen oxides to 32 - 62 NL / min.

[0016] Optionally, before continuously introducing nitrogen oxides into the reaction vessel, prepare the nitrogen oxides by reacting sodium nitrite and nitric acid with air.

[0017] A method for oxidizing hydrazine and hydroxylamine in a 1BP liquid material provided by the present application, on the premise of continuously introducing nitrogen oxides into the reaction vessel, first circulate the 1BP liquid material in the reaction vessel at 50% of the required speed to increase the reaction time between the nitrogen oxides and the water in the 1BP liquid material, thereby increasing the generation amount of nitrous acid, so that the generated nitrous acid can completely oxidize the hydroxylamine and hydrazine in the 1BP liquid material, thus releasing more heat to increase the temperature in the reaction vessel. When the temperature in the reaction vessel rises to 42 degrees Celsius or exceeds 42 degrees Celsius, ensure that the hydroxylamine and nitric acid in the 1BP liquid material can undergo an autocatalytic reaction to generate nitrous acid. Thereafter, circulate the 1BP liquid material in the reaction vessel at 100% of the required speed. Although the nitrous acid generated by the reaction of the nitrogen oxides and the water in the 1BP liquid material decreases, in the current temperature environment, the hydroxylamine and nitric acid in the 1BP liquid material undergo an autocatalytic reaction to generate nitrous acid, making the nitrous acid in the reaction vessel sufficient to completely oxidize the hydroxylamine and hydrazine in the 1BP liquid material.

[0018] In a second aspect, the present application further provides an apparatus for oxidizing hydrazine and hydroxylamine in a 1BP liquid material, including:

[0019] A reaction vessel, with a first feed port and a second feed port provided at the bottom of the side wall, the second feed port being adapted to introduce nitrogen oxides, an outlet provided at the top of the side wall of the reaction vessel, and an exhaust port provided at the top of the reaction vessel;

[0020] A feeding device, which is communicated with the first feeding port, and is used for feeding the 1BP liquid into the first feeding port at a preset speed.

[0021] Optionally, the feeding device includes:

[0022] A feeding tank for containing the 1BP liquid;

[0023] A first gas-liquid separation device, which is communicated with the first feeding port, and the height of the first gas-liquid separation device is higher than that of the discharge port;

[0024] A first air lift, which is connected between the feeding tank and the first gas-liquid separation device, and the first air lift can lift the 1BP liquid in the feeding tank to the first gas-liquid separation device.

[0025] Optionally, it further includes:

[0026] A discharging device, a discharging port is arranged at the bottom of the reaction vessel, and the discharging device is communicated with the discharging port;

[0027] An emptying tank, the discharging device is communicated with the emptying tank, and the discharging device is adapted to discharge the liquid in the reaction vessel to the emptying tank.

[0028] Optionally, the discharging device includes:

[0029] A second gas-liquid separation device, which is communicated with the emptying tank, and the height of the second gas-liquid separation device is higher than that of the emptying tank;

[0030] A second air lift, which is connected between the discharging port and the second gas-liquid separation device, and the second air lift can lift the liquid in the reaction vessel to the second gas-liquid separation device.

[0031] An apparatus for oxidizing hydrazine and hydroxylamine in 1BP liquid provided by the present application includes a reaction vessel and a feeding device. The bottom of the side wall of the reaction vessel is respectively provided with a first feeding port and a second feeding port, both the first feeding port and the second feeding port are communicated with the inside of the reaction vessel, and the second feeding port is used for feeding nitrogen oxides. A discharging port is arranged at the top of the side wall of the reaction vessel. The feeding device is communicated with the first feeding port and can feed the 1BP liquid into the first feeding port at a preset speed.

[0032] On the premise of continuously introducing nitrogen oxides into the reaction vessel from the second feed port, first use the feeding device to introduce the 1BP liquid material from the first feed port, so that the 1BP liquid material circulates in the reaction vessel at a demand speed of 50%, in order to increase the reaction time between the nitrogen oxides and the water in the 1BP liquid material, thereby increasing the production amount of nitrous acid, so that the generated nitrous acid can completely oxidize the hydroxylamine and hydrazine in the 1BP liquid material, thus releasing more heat to increase the temperature in the reaction vessel. When the temperature in the reaction vessel rises to 42 degrees Celsius or exceeds 42 degrees Celsius, ensure that the hydroxylamine and nitric acid in the 1BP liquid material can undergo an autocatalytic reaction to generate nitrous acid. After that, then circulate the 1BP liquid material in the reaction vessel at a demand speed of 100%. Although the nitrous acid generated by the reaction of the nitrogen oxides and the water in the 1BP liquid material decreases, in the temperature environment at this time, the hydroxylamine and nitric acid in the 1BP liquid material undergo an autocatalytic reaction to generate nitrous acid, so that the nitrous acid in the reaction vessel is sufficient to completely oxidize the hydroxylamine and hydrazine in the 1BP liquid material. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the related art, the following will briefly introduce the drawings required to be used in the description of the specific embodiments or the related art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0034] Figure 1 It is a flowchart of a method for oxidizing hydrazine and hydroxylamine in 1BP liquid material according to an embodiment of the present application;

[0035] Figure 2 It is another flowchart of a method for oxidizing hydrazine and hydroxylamine in 1BP liquid material according to an embodiment of the present application;

[0036] Figure 3 It is a schematic structural diagram of the reaction vessel of a device for oxidizing hydrazine and hydroxylamine in 1BP liquid material according to an embodiment of the present application;

[0037] Figure 4 It is a schematic structural diagram of a device for oxidizing hydrazine and hydroxylamine in 1BP liquid material according to an embodiment of the present application.

[0038] Description of the reference numerals in the drawings:

[0039] 1. Reaction vessel; 11. First feed port; 12. Second feed port; 13. Discharge port; 14. Drain port; 15. Exhaust port; 2. Feeding device; 21. Feed tank; 22. First gas-liquid separation device; 23. First air lift; 3. Discharging device; 31. Second gas-liquid separation device; 32. Second air lift; 4. Emptying tank; 5. Packing; 6. Wire mesh; 7. Receiving tank. Detailed Implementation Modes

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those skilled in the art based on the embodiments of the present application without creative efforts fall within the scope of protection of the present application.

[0041] The following combines Figures 1 to 4 to describe the embodiments of the present application.

[0042] According to an embodiment of the present application, on the one hand, a method for oxidizing hydrazine and hydroxylamine in a 1BP feed solution is provided. As Figure 1 shown, it includes:

[0043] S1: Continuously introduce nitrogen oxides into the reaction vessel 1;

[0044] S2: Circulate the 1BP feed solution in the reaction vessel 1 at 50% of the required speed;

[0045] S3: Ensure that the temperature in the reaction vessel 1 is not less than 42 °C;

[0046] S4: Circulate the 1BP feed solution in the reaction vessel 1 at 100% of the required speed.

[0047] The required speed is the flow rate of the 1BP feed solution required to ensure the processing efficiency when processing the 1BP feed solution.

[0048] Among them, the nitrogen oxides are nitrogen dioxide (NO2). The chemical equation for the reaction of nitrogen oxides with water to form nitrous acid is as follows:

[0049] 2NO2 + H2O = HNO3 + HNO2

[0050] The chemical equation for the reaction of nitrous acid with hydrazine is as follows:

[0051] 3N2H4 + 4HNO2 = 5N2 + 8H2O

[0052] The chemical equation for the reaction of nitrous acid with hydroxylamine is as follows:

[0053] NH2OH + HNO2 = N2O + 2H2O

[0054] In a nitric acid system, the chemical equation for the "autocatalytic" reaction of hydroxylamine with nitric acid to form nitrous acid is as follows:

[0055] NH2OH + 2HNO3 = 3HNO2 + 2H2O

[0056] Specifically, when continuously introducing nitrogen dioxide into the reaction vessel 1 and circulating the 1BP feed liquid in the reaction vessel 1, part of the nitrogen dioxide undergoes an oxidation reaction with trivalent plutonium as follows:

[0057] 4Pu 3+ +2NO2 + 4H2O = 4Pu 4+ +N2O + 4OH -

[0058] And part of the nitrogen dioxide reacts with water to form nitrous acid. Since the reducibility of hydroxylamine is greater than that of hydrazine, hydroxylamine first undergoes an oxidation reaction with the generated nitrous acid, and then hydrazine undergoes an oxidation reaction with nitrous acid. Since the flow rate of the 1BP feed liquid in the reaction vessel 1 is only 50% of the required rate at this time, compared with the flow rate of 100%, the 1BP feed liquid stays in the reaction vessel 1 for a longer time per unit time, that is, the reaction time is longer. This enables the nitrogen dioxide to react with water for a longer time to generate more nitrous acid, thus ensuring the complete oxidation of hydrazine.

[0059] Since more hydrazine undergoes an oxidation reaction, more heat is released, causing the temperature in the reaction vessel 1 to rise above 40 degrees Celsius. Since the 1BP feed liquid itself contains nitric acid, and due to the increase in temperature, hydroxylamine undergoes a "self-catalyzed" reaction with nitric acid in the nitric acid environment to generate nitrous acid.

[0060] In this way, when it is determined that the temperature in the reaction vessel 1 is not less than 42 degrees Celsius, it is determined that hydroxylamine and nitric acid stably undergo a "self-catalyzed" reaction and stably generate nitrous acid. Among them, the stability of the temperature can be determined according to the fact that the temperature in the reaction vessel 1 can remain not less than 42 degrees Celsius for 15 minutes.

[0061] Thereafter, for the sake of processing efficiency, the 1BP feed liquid is circulated in the reaction vessel 1 at 100% of the required rate. Although the reaction time of nitrogen dioxide with water is shortened, since the temperature in the reaction vessel 1 is already high enough, hydroxylamine undergoes a "self-catalyzed" reaction with nitric acid in the nitric acid environment to generate nitrous acid. Therefore, the remaining hydrazine that cannot be completely oxidized can be oxidized by the nitrous acid generated by the "self-catalyzed" reaction of hydroxylamine with nitric acid in the nitric acid environment. Thus, even when the 1BP feed liquid is circulated at 100% of the required rate, it can ensure that the hydrazine in the 1BP feed liquid is completely oxidized.

[0062] As an optional implementation manner, as Figure 2 shown, before continuously introducing nitrogen oxides into the reaction vessel 1, first fill the reaction vessel 1 with the 1BP feed liquid, so that the nitrogen oxides can react with the 1BP feed liquid in the reaction vessel 1 immediately after being introduced into the reaction vessel 1, reducing the waste of nitrogen oxides.

[0063] Further, first fill the reaction vessel 1 with the 1BP liquid material, and then introduce nitrogen oxides into the reaction vessel 1. Then, first detect the temperature inside the reaction vessel 1. When it is determined that the temperature inside the reaction vessel 1 is greater than 42 °C, start circulating 50% of the 1BP liquid material at a preset speed in the reaction vessel 1.

[0064] Specifically, after the nitrogen oxides are introduced into the reaction vessel 1 filled with the 1BP liquid material, the nitrogen oxides continuously react with the water in the 1BP liquid material to generate nitrous acid. The hydroxyl group in the 1BP liquid material first reacts with the nitrous acid, releasing heat and causing the temperature inside the reaction vessel 1 to rise. Then, the hydrazine in the 1BP liquid material reacts with the nitrous acid, releasing heat and causing the temperature inside the reaction vessel 1 to continue to rise. When the temperature inside the reaction vessel 1 is greater than 42 °C, it indicates that the hydrazine in the 1BP liquid material has been completely oxidized by the nitrous acid. At this time, start circulating 50% of the 1BP liquid material at a preset speed in the reaction vessel 1 to ensure that the liquid material discharged from the reaction vessel 1 does not contain hydrazine, and avoid the discharge of unqualified (containing hydrazine) liquid material when the 1BP liquid material circulates.

[0065] In some embodiments, after continuously introducing nitrogen oxides into the reaction vessel 1 on the same day, the temperature of the reaction vessel 1 is detected after 10 - 15 minutes.

[0066] Among them, after the nitrogen oxides are introduced into the reaction vessel 1 filled with the 1BP liquid material, it generally takes at least 10 minutes for the hydroxyl group and hydrazine to react completely. Therefore, the temperature of the reaction vessel 1 can be detected after 10 minutes to reduce ineffective detection operations. Also, since the hydroxyl group and hydrazine will definitely react completely in 15 minutes, in order to increase the processing efficiency, the temperature of the reaction vessel 1 can be detected before 15 minutes. Therefore, the temperature of the reaction vessel 1 can be detected 10 - 15 minutes after introducing the nitrogen oxides, such as 12 minutes. This reduces ineffective detection operations and avoids low processing efficiency.

[0067] As an alternative embodiment, when continuously introducing nitrogen oxides into the reaction vessel 1, the flow rate of the introduced nitrogen oxides is controlled to be 32 - 62 NL / min.

[0068] For example, the flow rate can be controlled to 32 NL / min to minimize the loss of nitrogen oxides while ensuring the supply of nitrogen oxides.

[0069] For example, the flow rate can be controlled to 62 NL / min to ensure the supply efficiency of nitrogen oxides while keeping the loss of nitrogen oxides relatively low.

[0070] For example, the flow rate can be controlled to 50 NL / min to balance the loss of nitrogen oxides and the supply efficiency.

[0071] As an alternative embodiment, if Figure 2As shown, before continuously introducing nitrogen oxides into the reaction vessel 1, nitrogen oxides are prepared by reacting sodium nitrite with nitric acid. The chemical equation for this reaction is as follows:

[0072] 2NaNO2 + 2HNO3 = 2NaNO3 + H2O + NO↑ + NO2↑

[0073] While the reaction is taking place, air is introduced, causing some of the generated nitric oxide to react with the oxygen in the air as follows:

[0074] 2NO + O2 = 2NO2↑

[0075] With this setup, after the generated gas is introduced into the reaction vessel 1, due to the presence of NO, the following reaction will also occur after reacting with the 1BP liquid feed:

[0076] NO2 + NO + H2O = 2HNO2

[0077] This further increases the production amount of nitrous acid and further ensures that hydroxylamine and hydrazine can react completely.

[0078] According to an embodiment of the present application, on the other hand, an apparatus for oxidizing hydrazine and hydroxylamine in a 1BP liquid feed is also provided. As Figure 3 and Figure 4 shown, it includes: a reaction vessel 1 and a feeding device 2.

[0079] As Figure 3 shown, a first feeding port 11 and a second feeding port 12 are respectively provided at the bottom of the side wall of the reaction vessel 1. Both the first feeding port 11 and the second feeding port 12 are in communication with the interior of the reaction vessel 1. The second feeding port 12 is used for introducing nitrogen oxides. An outlet port 13 is provided at the top of the side wall of the reaction vessel 1, and an exhaust port 15 is provided at the top of the reaction vessel 1.

[0080] The feeding device 2 is in communication with the first feeding port 11 and can introduce the 1BP liquid feed into the first feeding port 11 at a preset speed.

[0081] When it is necessary to oxidize hydrazine and hydroxylamine in the 1BP liquid feed, first use the feeding device 2 to introduce the 1BP liquid feed into the first feeding port 11, causing the 1BP liquid feed to enter the reaction vessel 1 and gradually flow upward until the 1BP liquid feed starts to discharge from the outlet port 13, then stop introducing the 1BP liquid feed into the first feeding port 11. At this time, the reaction vessel 1 is filled with the 1BP liquid feed.

[0082] Then, nitrogen oxides are prepared and introduced into the second feed port 12, so that the nitrogen oxides enter the reaction vessel 1 and gradually flow upward. During the flow process, part of the nitrogen oxides react with plutonium to undergo an oxidation reaction, and part react with the water in the 1BP feed solution to generate nitrous acid. The nitrous acid successively undergoes oxidation reactions with hydroxylamine and hydrazine in the 1BP feed solution, releasing heat and causing the temperature in the reaction vessel 1 to rise.

[0083] When the temperature rises to 42 °C, the feeding device 2 is started to introduce the 1BP feed solution into the first feed port 11, so that the 1BP feed solution can flow in the reaction vessel 1 at 50% of the required speed. At this time, the temperature drops, but since the nitrogen oxides can react with water for a longer time to generate more nitrous acid, there is enough nitrous acid for the hydroxylamine and hydrazine in the 1BP feed solution to be completely oxidized, thereby releasing more heat and causing the temperature in the reaction vessel 1 to rise.

[0084] When the temperature in the reaction vessel 1 rises to 42 °C or exceeds 42 °C, since the 1BP feed solution itself contains nitric acid and due to the increase in temperature, the hydroxylamine undergoes an "autocatalytic" reaction with nitric acid in the nitric acid environment to generate nitrous acid, further ensuring that there is enough nitrous acid to oxidize hydroxylamine and hydrazine.

[0085] When the temperature in the reaction vessel 1 rises to 42 °C or exceeds 42 °C and stabilizes for 15 minutes, the feeding device 2 is further used to introduce the 1BP feed solution into the first feed port 11, so that the 1BP feed solution can flow in the reaction vessel 1 at 100% of the required speed. At this time, although the reaction time of nitrogen dioxide with the water in the 1BP feed solution is shortened, since the temperature in the reaction vessel 1 is already high enough, the hydroxylamine can undergo an "autocatalytic" reaction with nitric acid in the nitric acid environment to generate nitrous acid, so that the remaining hydrazine that cannot be completely oxidized can be oxidized by the nitrous acid generated by the "autocatalytic" reaction of hydroxylamine with nitric acid in the nitric acid environment. Therefore, even if the 1BP feed solution flows at 100% of the required speed, it can ensure that the hydrazine in the 1BP feed solution can be completely oxidized.

[0086] The gas generated after the reaction can be discharged from the exhaust port 15 at the top of the reaction vessel 1.

[0087] Specifically, the reaction vessel 1 can be a hollow cylindrical shape.

[0088] Among them, as Figure 3 shown, packing 5 can be provided in the reaction vessel 1. The packing 5 can be Raschig ring packing 5. The packing 5 is arranged between the second feed port 12 and the discharge port 13, so as to increase the contact area between the nitrogen oxides and the 1BP feed solution and make the reaction more complete.

[0089] Moreover, a temperature sensor can be arranged inside the reaction vessel 1 and communicatively connected to the corresponding temperature detection module, facilitating the detection of the temperature inside the reaction vessel 1.

[0090] As Figure 4 shown, the device may further include a receiving tank 7, which is communicated with the discharge port 13. After the oxidized 1BP liquid is discharged from the discharge port 13, it enters the receiving tank 7 for storage.

[0091] As an alternative embodiment, as Figure 4 shown, the feeding device 2 includes: a feeding tank 21, a first gas-liquid separation device 22, and a first air lift 23. The feeding tank 21 is a container for storing the 1BP liquid.

[0092] The first gas-liquid separation device 22 can be a common cyclone gas-liquid separator. After the gas-liquid mixture enters the first gas-liquid separation device 22, it is separated into gas and liquid. The first air lift 23 is a common air lift, which can transport the liquid to a designated position through high-pressure gas.

[0093] Specifically, the feeding tank 21 is communicated with the inlet of the first gas-liquid separation device 22 through the first air lift 23. The liquid outlet of the first gas-liquid separation device 22 is communicated with the first feed port 11, and the height of the first gas-liquid separation device 22 is higher than that of the discharge port 13.

[0094] In this way, the first air lift 23 can introduce the 1BP liquid in the feeding tank 21 mixed with high-pressure gas into the first gas-liquid separation device 22. After the first gas-liquid separation device 22 separates the high-pressure gas from the 1BP liquid, the 1BP liquid flows out from the liquid outlet of the first gas-liquid separation device 22 and enters the reaction vessel 1 through the first feed port 11.

[0095] Since the height of the first gas-liquid separation device 22 is higher than that of the discharge port 13, according to the principle of communicating vessels, the 1BP liquid can continuously flow upward in the reaction vessel 1 until it is discharged from the discharge port 13.

[0096] This setting minimizes manual intervention, reduces contact with the 1BP liquid, and avoids affecting personal safety.

[0097] The air lift includes an air compressor and a three-way joint. The three-way joint includes a first interface, a second interface, and a third interface. The first interface is communicated with the air compressor. After the high-pressure gas generated by the air compressor enters the first interface, the high-pressure gas flows to the third interface.

[0098] For example, connect the second interface to the feed tank 21 and the third interface to the inlet of the first gas-liquid separation device 22. After starting the air compressor, high-pressure gas enters from the first interface, flows to the third interface, and then jets out from the third interface. Thus, under the action of negative pressure, the 1BP liquid material is drawn out from the feed tank 21. After entering from the second interface, the 1BP liquid material is mixed with the high-pressure gas, jets out from the third interface, and is lifted upward to the first gas-liquid separation device 22.

[0099] As an optional embodiment, as Figure 4 shown, the device further includes a discharging device 3 and an emptying tank 4. A discharging port 14 is provided at the bottom of the reaction vessel 1, and the discharging port 14 is connected to the emptying tank 4 through the discharging device 3.

[0100] With this arrangement, when the device is not needed or when the inside of the reaction vessel 1 needs to be cleaned, the discharging device 3 can be used to discharge the residual liquid material in the reaction vessel 1 from the discharging port 14 and then discharge it to the emptying tank 4.

[0101] Furthermore, the discharging device 3 includes a second gas-liquid separation device 31 and a second air lift 32.

[0102] The second gas-liquid separation device 31 can be a common cyclone gas-liquid separator. After the gas-liquid mixture enters the second gas-liquid separation device 31, it is separated into gas and liquid. The second air lift 32 is a common air lift, which can transport the liquid to a designated position through high-pressure gas.

[0103] Specifically, the discharging port 13 is connected to the inlet of the second gas-liquid separation device 31 through the second air lift 32, and the liquid outlet of the second gas-liquid separation device 31 is connected to the emptying tank 4.

[0104] In this way, the second air lift 32 can introduce the residual liquid material in the reaction vessel 1 mixed with high-pressure gas into the second gas-liquid separation device 31. After the second gas-liquid separation device 31 separates the high-pressure gas from the liquid material, the liquid material flows out from the liquid outlet of the second gas-liquid separation device 31 into the emptying tank 4.

[0105] With this arrangement, manual intervention is minimized, contact with the liquid material is reduced, and personal safety is avoided being affected.

[0106] As an optional embodiment, as Figure 3 and Figure 4 shown, the device further includes a wire mesh 6. The wire mesh 6 is arranged inside the reaction vessel 1 and between the exhaust port 15 and the discharging port 13. When the reacted gas is discharged through the exhaust port 15, the wire mesh 6 can filter out the foam or aerosol in the gas, preventing the foam or aerosol from being discharged to the outside and polluting the environment.

[0107] Although embodiments of the present application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present application, and such modifications and variations fall within the scope defined by the present application.

Claims

1. A method for oxidizing hydrazine and hydroxylamine in a 1BP feed liquid, characterized in that, Comprising: Continuously introduce nitrogen oxides into the reaction vessel (1); Circulate the 1BP liquid material at 50% of the required speed in the reaction vessel (1); Determine that the temperature inside the reaction vessel (1) is not less than 42 °C; Circulate the 1BP liquid material at 100% of the required speed in the reaction vessel (1).

2. The method for oxidizing hydrazine and hydroxylamine in the 1BP feed solution according to claim 1, wherein Before continuously introducing nitrogen oxides into the reaction vessel (1), first fill the reaction vessel (1) with the 1BP liquid material.

3. The method for oxidizing hydrazine and hydroxylamine in the 1BP feed solution according to claim 2, wherein After continuously introducing nitrogen oxides into the reaction vessel (1), first determine that the temperature inside the reaction vessel (1) is greater than 42 °C, and then circulate the 1BP liquid material at 50% of the preset speed in the reaction vessel (1).

4. The method for oxidizing hydrazine and hydroxylamine in the 1BP feed liquid according to claim 3, wherein, Detect the temperature inside the reaction vessel (1) 10 - 15 minutes after continuously introducing nitrogen oxides into the reaction vessel (1).

5. The method for oxidizing hydrazine and hydroxylamine in the 1BP feed liquid according to claim 1, wherein, When continuously introducing nitrogen oxides into the reaction vessel (1), control the flow rate of the introduced nitrogen oxides to be 32 - 62 NL / min.

6. The method for oxidizing hydrazine and hydroxylamine in the 1BP feed liquid according to claim 1, characterized in that, Before continuously introducing nitrogen oxides into the reaction vessel (1), prepare the nitrogen oxides by reacting sodium nitrite and nitric acid with air.

7. An apparatus for oxidizing hydrazine and hydroxylamine in a 1BP feed solution, characterized in that, Comprising: Reaction vessel (1), with a first feed inlet (11) and a second feed inlet (12) provided at the bottom of the side wall. The second feed inlet (12) is suitable for introducing nitrogen oxides, and a discharge outlet (13) is provided at the top of the side wall of the reaction vessel (1); Feeding device (2), connected to the first feed inlet (11), and the feeding device (2) is used to introduce the 1BP liquid material into the first feed inlet (11) at a preset speed.

8. The apparatus for oxidizing hydrazine and hydroxylamine in the 1BP feed liquid according to claim 7, wherein, The feeding device (2) comprises: Feeding tank (21), used to hold the 1BP liquid material; First gas-liquid separation device (22), connected to the first feed inlet (11), and the height of the first gas-liquid separation device (22) is higher than that of the discharge outlet (13); First air lift (23), connected between the feeding tank (21) and the first gas-liquid separation device (22), and the first air lift (23) can lift the 1BP liquid material in the feeding tank (21) to the first gas-liquid separation device (22).

9. The apparatus for oxidizing hydrazine and hydroxylamine in a 1BP feed solution according to claim 7, wherein, Further comprising: Discharging device (3), with a discharge port (14) provided at the bottom of the reaction vessel (1), and the discharging device (3) is connected to the discharge port (14); Emptying tank (4), the discharging device (3) is connected to the emptying tank (4), and the discharging device (3) is suitable for discharging the liquid material in the reaction vessel (1) to the emptying tank (4).

10. The apparatus for oxidizing hydrazine and hydroxylamine in the 1BP feed solution according to claim 9, wherein, The discharging device (3) comprises: Second gas-liquid separation device (31), connected to the emptying tank (4), and the height of the second gas-liquid separation device (31) is higher than that of the emptying tank (4); Second air lift (32), connected between the discharge port (14) and the second gas-liquid separation device (31), and the second air lift (32) can lift the liquid material in the reaction vessel (1) to the second gas-liquid separation device (31).

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