Device for recovering ammonia and nitrous oxide in reaction tail gas

Abstract

The utility model relates to a device for recovering ammonia and nitrous oxide in reaction tail gas. The device comprises a reaction tail gas pipeline, a deamination washing tower, a fresh process water pipeline, a first liquid phase discharging pipeline, a first gas phase discharging pipeline, a liquid separation drying bed, a second liquid phase discharging pipeline, an ammonia water storage tank, a second gas phase discharging pipeline, a first low-temperature separator, a third liquid phase discharging pipeline, a third gas phase discharging pipeline and a second low-temperature separator, the system comprises a first low-temperature separator, a second low-temperature separator, a third gas-liquid separator, a third liquid phase discharge pipeline and a nitrous oxide storage tank, the first gas-liquid separator is communicated with the ammonia water storage tank, a second gas-liquid separator communicated with the second low-temperature separator is arranged in the first low-temperature separator, the third gas-liquid separator is arranged in the second low-temperature separator, and the third gas-liquid separator is communicated with the nitrous oxide storage tank. Therefore, the ammonia and the nitrous oxide in the reaction tail gas are purified and recycled in different modes, and environmental pollution caused by waste of the ammonia and the nitrous oxide is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical production equipment, in particular to a device for recovering ammonia and nitrous oxide in reaction tail gas. Background Art

[0002] Nitrous oxide is expensive and has a wide range of uses. In industry, it can be used as standard gas, refrigerant, combustion aid, preservative, smoke spray and chemical raw material, and can be used for vacuum and pressure leak detection. In the electronics industry, nitrous oxide can be used in the dielectric film process for the development and production of semiconductor optoelectronic devices. It is an irreplaceable key electronic gas that directly affects the quality of optoelectronic devices. At the same time, it can also be used as a booster in the aerospace and racing fields, and as a food processing aid in the food industry.

[0003] Most of the existing caprolactam production processes use the hydroxylamine oximation process, the main reaction principle of which is that ammonia is oxidized to amine by hydrogen peroxide under the catalysis of a catalyst, and hydroxylamine and cyclohexanone react without catalysis to generate cyclohexanone oxime. In addition to the above reactions, there are also side reactions such as ammonia escape, hydrogen peroxide decomposition, and hydrogen peroxide and ammonia reaction to generate nitrous oxide. The existing method for treating ammonia and byproduct nitrous oxide in the tail gas of the ammonia oximation reaction is to directly introduce a torch to burn it to produce nitrogen and water, resulting in waste of ammonia and byproduct nitrous oxide, causing environmental pollution. Utility Model Content

[0004] The technical problem to be solved by the utility model is: the utility model provides a device for recovering ammonia and nitrous oxide in reaction tail gas, so as to realize the recovery of ammonia and nitrous oxide in tail gas and avoid environmental pollution caused by waste of ammonia and nitrous oxide.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] In the first aspect, the embodiment of the utility model provides a device for recovering ammonia and nitrous oxide in reaction tail gas, comprising a reaction tail gas pipeline, a deamination washing tower, a fresh process water pipeline, a first gas phase discharge pipeline, a liquid separation drying bed, a second liquid phase discharge pipeline, an ammonia water storage tank, a second gas phase discharge pipeline, a first low temperature separator, a third gas phase discharge pipeline, a second low temperature separator, a third gas-liquid separator, a third liquid phase discharge pipeline and a nitrous oxide storage tank, wherein the reaction tail gas pipeline is connected to the gas phase inlet of the deamination washing tower, and the reaction tail gas pipeline is used to access the reaction tail gas;

[0007] A fresh process water distributor is provided in the deammoniation washing tower, and the fresh process water distributor is connected to the fresh process water pipeline. The first liquid phase discharge pipeline is connected to the liquid phase outlet of the deammoniation washing tower, and the first liquid phase discharge pipeline is connected to the ammonia water storage tank. The first gas phase discharge pipeline is connected to the gas phase outlet of the deammoniation washing tower, and the first gas phase discharge pipeline is connected to the first gas-liquid separator in the middle of the liquid separation drying bed. The first gas-liquid separator is connected to the ammonia water storage tank through the second liquid phase discharge pipeline, and the first gas-liquid separator is connected to the first low-temperature separator through the second gas phase discharge pipeline. The first low-temperature separator is provided with a second gas-liquid separator, and the second gas-liquid separator is connected to the second low-temperature separator through the third gas phase discharge pipeline. The second low-temperature separator is provided with a third gas-liquid separator, and the third gas-liquid separator is connected to the nitrous oxide storage tank through the third liquid phase discharge pipeline.

[0008] The beneficial effects of the utility model are as follows: a fresh process water distributor connected to a fresh process water pipeline is provided in the deammoniation washing tower; after the reaction tail gas enters the deammoniation washing tower, the fresh process water will initially absorb the ammonia in the reaction tail gas; the absorbed ammonia water enters the ammonia water storage tank through the first liquid phase discharge pipeline; and the remaining gas phase, that is, the gas phase containing a small amount of ammonia enters the first gas-liquid separator through the first gas phase discharge pipeline; gas-liquid separation is performed in the first gas-liquid separator; the separated liquid phase flows into the ammonia water storage tank; the separated gas phase enters the first low The low-temperature separator condenses the gaseous ammonia into liquid ammonia under the condensing action of the first low-temperature separator and then passes through the second gas-liquid separator for gas-liquid separation. The separated gas phase enters the second low-temperature separator through the third gas phase discharge pipeline. Under the condensing action of the second low-temperature separator, the gaseous nitrous oxide is condensed into liquid nitrous oxide and flows into the nitrous oxide storage tank, thereby purifying and recovering the ammonia and nitric oxide in the reaction tail gas in different ways, realizing the recycling of the ammonia and nitric oxide in the reaction tail gas, and avoiding environmental pollution caused by the waste of ammonia and nitrous oxide.

[0009] Optionally, it also includes a fan, the liquid separation drying bed includes a desiccant layer, the second gas phase discharge pipeline is connected to the desiccant layer, and at the same time, the second gas phase discharge pipeline is connected to the input pipeline of the fan, and the output pipeline of the fan is connected to the first low-temperature separator.

[0010] According to the above description, the gas phase passing through the second gas phase discharge pipeline will enter the desiccant layer, and will be dried and dehydrated under the action of the desiccant in the desiccant layer, thereby further ensuring gas-liquid separation and obtaining high-purity gaseous ammonia.

[0011] Optionally, a fourth liquid phase discharge pipeline is further included, and the second gas-liquid separator is connected to the ammonia water storage tank through the fourth liquid phase discharge pipeline.

[0012] According to the above description, the second gas-liquid separator arranged in the first low-temperature separator is connected to the ammonia water storage tank through the fourth liquid phase discharge pipeline, that is, the liquid ammonia passing through the second gas-liquid separator will flow into the ammonia water storage tank to realize the recovery and utilization of ammonia.

[0013] Optionally, it also includes an ammonia water delivery pump, an ammonia water pump inlet pipeline and an ammonia water pump outlet pipeline. The ammonia water storage tank is connected to the ammonia water delivery pump through the ammonia water pump inlet pipeline, the ammonia water delivery pump is connected to the ammonia water pump outlet pipeline, and the ammonia water pump outlet pipeline is used for circulating water.

[0014] According to the above description, the ammonia water in the ammonia water storage tank is recycled through the ammonia water delivery pump, the ammonia water pump inlet pipeline and the ammonia water pump outlet pipeline, thereby improving its use value.

[0015] Optionally, it also includes a nitrous oxide liquid delivery pump, a nitrous oxide liquid pump inlet pipeline and a nitrous oxide liquid pump outlet pipeline, the nitrous oxide storage tank is connected to the nitrous oxide liquid delivery pump through the nitrous oxide liquid pump inlet pipeline, and the nitrous oxide liquid delivery pump is connected to the nitrous oxide liquid pump outlet pipeline.

[0016] According to the above description, the liquid nitrous oxide in the nitrous oxide storage tank is recycled through the nitrous oxide liquid delivery pump, the nitrous oxide liquid pump inlet pipeline and the nitrous oxide pump outlet pipeline to improve the use value.

[0017] Optionally, it also includes a washing tower circulation pump, a circulating liquid inlet pipeline and a circulating liquid outlet pipeline. A circulating liquid distributor is provided in the deammoniation washing tower. The washing tower circulation pump is connected to the outlet end of the deammoniation washing tower through the circulating liquid inlet pipeline. At the same time, the washing tower circulation pump is connected to the circulating liquid distributor through the circulating liquid outlet pipeline.

[0018] According to the above description, the recycling of the circulating liquid in the deammoniation washing tower is achieved through the washing tower circulation pump, the circulating pump inlet pipeline, the circulating pump outlet pipeline and the circulating liquid distributor in the deammoniation washing tower.

[0019] Optionally, the temperature range of the first low-temperature separator is -80°C to 77°C, and the temperature range of the second low-temperature separator is -100°C to 90°C.

[0020] According to the above description, corresponding low-temperature separators are set according to different gas-phase liquefaction conditions, thereby ensuring the rationality of the set low-temperature separators and improving the success rate of gas-phase liquefaction.

[0021] Optionally, the gas entering the first gas-liquid separator from the first gas-phase discharge pipeline enters at a tangent line, and the gas entering the second low-temperature separator from the third gas-phase discharge pipeline enters at a tangent line.

[0022] According to the above description, the gas entering the first gas-liquid separator and the gas entering the second low-temperature separator both enter tangentially, thereby improving the controllability of the gas flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The utility model provides a structural diagram of a device for recovering ammonia and nitrous oxide in reaction tail gas.

[0024] [Description of Reference Numerals]

[0025] 1. Reaction tail gas pipeline;

[0026] 2. Deammoniation washing tower; 200. Fresh process distributor; 201. Circulating liquid distributor;

[0027] 3. Fresh process water pipeline;

[0028] 4. First liquid phase discharge pipeline;

[0029] 5. The first gas phase discharge pipeline;

[0030] 6. Liquid separation drying bed; 600. First gas-liquid separator; 601. Desiccant layer;

[0031] 7. Second liquid phase discharge pipeline;

[0032] 8. Ammonia storage tank;

[0033] 9. Second gas phase discharge pipeline;

[0034] 10. a first low-temperature separator; 100. a second gas-liquid separator;

[0035] 11. The third gas phase discharge pipeline;

[0036] 12. a second low-temperature separator; 120 a third gas-liquid separator;

[0037] 13. The third liquid phase discharge pipeline;

[0038] 14. Nitrous oxide storage tank;

[0039] 15. Fan;

[0040] 16. Fourth liquid phase discharge pipeline;

[0041] 17. Ammonia delivery pump;

[0042] 18. Ammonia pump inlet pipeline;

[0043] 19. Ammonia pump outlet pipeline;

[0044] 20. Nitrous oxide liquid delivery pump;

[0045] 21. Nitrous oxide liquid pump inlet pipeline;

[0046] 22. Nitrous oxide liquid pump outlet pipeline;

[0047] 23. Circulation pump of washing tower;

[0048] 24. Circulating fluid inlet pipeline;

[0049] 25. Circulating fluid outlet pipeline. DETAILED DESCRIPTION

[0050] In order to better understand the above technical solution, exemplary embodiments of the present invention will be described in more detail with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to enable a clearer and more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0051] Embodiment 1:

[0052] Reference Figure 1 The present embodiment provides a device for recovering ammonia and nitrous oxide in reaction tail gas, comprising a reaction tail gas pipeline 1, a deammoniation washing tower 2, a fresh process water pipeline 3, a first liquid phase discharge pipeline 4, a first gas phase discharge pipeline 5, a liquid separation drying bed 6, a second liquid phase discharge pipeline 7, an ammonia water storage tank 8, a second gas phase discharge pipeline 9, a first low temperature separator 10, a third gas phase discharge pipeline 11, a second low temperature separator 12, a third gas-liquid separator 120, a third liquid phase discharge pipeline 13, a nitrous oxide storage tank 14, a fan 15, and a fourth liquid phase discharge pipeline 16. Pipeline 16, ammonia water delivery pump 17, ammonia water pump inlet pipeline 18, ammonia water pump outlet pipeline 19, nitrous oxide liquid delivery pump 20, nitrous oxide liquid pump inlet pipeline 21, nitrous oxide liquid pump outlet pipeline 22, washing tower circulation pump 23, circulating liquid inlet pipeline 24 and circulating liquid outlet pipeline 25. Specifically, the reaction tail gas pipeline 1 is connected to the gas phase inlet of the deamination washing tower 2, and the reaction tail gas pipeline 1 is used to connect the reaction tail gas. The reaction tail gas enters the deamination washing tower 2 from the gas phase inlet of the deamination washing tower 2 through the reaction tail gas pipeline 1.

[0053] In this embodiment, if Figure 1As shown, a fresh process distributor 200 is provided in the deamination washing tower 2, and the fresh process distributor 200 is connected to the fresh process water pipeline 3. The process water in the fresh process water pipeline 3 preliminarily absorbs the ammonia in the reaction tail gas entering the deamination washing tower 2 to obtain ammonia water after preliminarily absorption. The first liquid phase discharge pipeline 4 is connected to the liquid phase outlet of the deamination washing tower 2. At the same time, the first liquid phase discharge pipeline 4 is connected to the ammonia water storage tank 8. Therefore, the preliminarily absorbed ammonia water obtained in the deamination washing tower 2 is discharged through the first liquid phase outlet. The discharge pipeline 4 flows out into the ammonia water storage tank 8. A circulating liquid distributor 201 is provided in the deamination washing tower 2. The washing tower circulating pump 23 is connected to the outlet end of the deamination washing tower 2 through the circulating liquid inlet pipeline 24. At the same time, the washing tower circulating pump 23 is connected to the circulating liquid distributor 201 through the circulating liquid outlet pipeline 25. That is, the recycling of the circulating liquid in the deamination washing tower 2 is achieved through the washing tower circulating pump 23, the circulating liquid inlet pipeline 24, the circulating liquid outlet pipeline 25 and the circulating liquid distributor 201.

[0054] The first gas phase discharge pipeline 5 is connected to the gas phase outlet of the deammoniation washing tower 2. At the same time, the first gas phase discharge pipeline 5 is connected to the first gas-liquid separator 600 in the middle of the liquid separation drying bed 6. Therefore, the gaseous ammonia in the deammoniation washing tower 2 enters the first gas-liquid separator 600 located in the middle of the liquid separation drying bed 6 through the first gas phase discharge pipeline 5, and gas-liquid separation is performed in the first gas-liquid separator 600.

[0055] The first gas-liquid separator 600 is connected to the ammonia water storage tank 8 through the second liquid phase discharge pipeline 7, that is, the ammonia water separated in the first gas-liquid separator 600 flows into the ammonia water storage tank 8 through the second liquid phase discharge pipeline 7. At the same time, the first gas-liquid separator 600 is connected to the first low-temperature separator 10 through the second gas phase discharge pipeline 9, that is, the gaseous ammonia separated in the first gas-liquid separator 600 enters the first low-temperature separator 10 through the second gas phase discharge pipeline 9 tangentially. Since the second gas phase discharge pipeline 9 is connected to the desiccant layer 601 of the liquid separation drying bed 6, the gaseous ammonia separated in the first gas-liquid separator 600 enters the desiccant layer 601. 1, drying and dehydration are performed under the action of the desiccant in the desiccant layer 601 to obtain dried and dehydrated gas ammonia, the second gas phase discharge pipeline 9 is connected with the input pipeline of the fan 15, and the output pipeline of the fan 15 is connected with the first low-temperature separator 10, so that the dried and dehydrated gas ammonia enters the fan 15 through the second gas phase discharge pipeline 9, and enters the first low-temperature separator 10 from the output pipeline of the fan 15 tangentially under the pressure of the fan 15, wherein the temperature range of the first low-temperature separator 10 is -80°C to 77°C, and the gas ammonia entering the first low-temperature separator 10 is condensed into liquid ammonia under the action of the cold source in the shell layer of the first low-temperature separator 10.

[0056] A second gas-liquid separator 100 is provided in the first low-temperature separator 10, and the second gas-liquid separator 100 is connected to the second low-temperature separator 12 via a third gas phase discharge pipeline 11, that is, the gas phase separated in the second gas-liquid separator 100 enters the second low-temperature separator 12 via a tangent of the third gas phase discharge pipeline 11, and at the same time, the second gas-liquid separator 100 is connected to the ammonia water storage tank 8 via a fourth liquid phase discharge pipeline 16, that is, the liquid phase separated in the second gas-liquid separator 100 enters the ammonia water storage tank 8 via the fourth liquid phase discharge pipeline 16.

[0057] The temperature range of the second low-temperature separator 12 is -100°C~90°C. The gas phase entering the second low-temperature separator 12, that is, nitrous oxide, is condensed into liquid nitrous oxide under the action of the cold source in the shell of the second low-temperature separator 12. A third gas-liquid separator 120 is provided in the second low-temperature separator 12. The third gas-liquid separator 120 is connected to the nitrous oxide storage tank 14 through a third liquid phase discharge pipeline 13, that is, the liquid phase separated in the third gas-liquid separator 120, that is, liquid nitrous oxide flows into the nitrous oxide storage tank 14 through the third liquid phase discharge pipeline 13, and the gas phase separated in the third gas-liquid separator 120, that is, the remaining nitrogen and oxygen will be directly discharged into the atmosphere through the venting pipeline of the second low-temperature separator 12.

[0058] The ammonia water storage tank 8 is connected to the ammonia water delivery pump 17 through the ammonia water pump inlet pipeline 18, and the ammonia water delivery pump 17 is connected to the ammonia water pump outlet pipeline 19. The ammonia water pump outlet pipeline 19 is used for circulating water, that is, the ammonia water in the ammonia water storage tank 8 is recycled through the ammonia water pump inlet pipeline 18, the ammonia water delivery pump 17 and the ammonia water pump outlet pipeline 19.

[0059] The nitrous oxide storage tank 14 is connected to the nitrous oxide liquid delivery pump 20 via the nitrous oxide liquid pump inlet pipeline 21, and the nitrous oxide liquid delivery pump 20 is connected to the nitrous oxide liquid pump outlet pipeline 22, that is, the liquid nitrous oxide in the nitrous oxide storage tank 14 is recycled via the nitrous oxide liquid pump inlet pipeline 21, the nitrous oxide liquid delivery pump 20 and the nitrous oxide liquid pump outlet pipeline 22.

[0060] In the description of the present utility model, it should be understood that 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 technical features indicated. Therefore, a feature defined as "first" or "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.

[0061] 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.

[0062] In the present utility model, unless otherwise clearly specified and limited, when a first feature is “on” or “below” a second feature, it may be 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, when a first feature is “above”, “above” or “above” a second feature, it may be that the first feature is directly above or obliquely above the second feature, or it may simply mean that the first feature is higher in level than the second feature. When a first feature is “below”, “below” or “below” a second feature, it may be that the first feature is directly below or obliquely below the second feature, or it may simply mean that the first feature is lower in level than the second feature.

[0063] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "embodiment", "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, unless they are contradictory.

[0064] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are illustrative 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 device for recovering ammonia and nitrous oxide in reaction tail gas, characterized in that: It includes a reaction tail gas pipeline, a deamination washing tower, a fresh process water pipeline, a first liquid phase discharge pipeline, a first gas phase discharge pipeline, a liquid separation drying bed, a second liquid phase discharge pipeline, an ammonia water storage tank, a second gas phase discharge pipeline, a first low temperature separator, a third gas phase discharge pipeline, a second low temperature separator, a third gas-liquid separator, a third liquid phase discharge pipeline and a nitrous oxide storage tank, wherein the reaction tail gas pipeline is connected to the gas phase inlet of the deamination washing tower, and the reaction tail gas pipeline is used to access the reaction tail gas; A fresh process water distributor is provided in the deammoniation washing tower, and the fresh process water distributor is connected to the fresh process water pipeline. The first liquid phase discharge pipeline is connected to the liquid phase outlet of the deammoniation washing tower, and the first liquid phase discharge pipeline is connected to the ammonia water storage tank. The first gas phase discharge pipeline is connected to the gas phase outlet of the deammoniation washing tower, and the first gas phase discharge pipeline is connected to the first gas-liquid separator in the middle of the liquid separation drying bed. The first gas-liquid separator is connected to the ammonia water storage tank through the second liquid phase discharge pipeline, and the first gas-liquid separator is connected to the first low-temperature separator through the second gas phase discharge pipeline. The first low-temperature separator is provided with a second gas-liquid separator, and the second gas-liquid separator is connected to the second low-temperature separator through the third gas phase discharge pipeline. The second low-temperature separator is provided with a third gas-liquid separator, and the third gas-liquid separator is connected to the nitrous oxide storage tank through the third liquid phase discharge pipeline.

2. A device for recovering ammonia and nitrous oxide in reaction tail gas according to claim 1, characterized in that: It also includes a fan, the liquid separation drying bed includes a desiccant layer, the second gas phase discharge pipeline is connected to the desiccant layer, and at the same time, the second gas phase discharge pipeline is connected to the input pipeline of the fan, and the output pipeline of the fan is connected to the first low-temperature separator.

3. A device for recovering ammonia and nitrous oxide in reaction tail gas according to claim 1, characterized in that: It also includes a fourth liquid phase discharge pipeline, and the second gas-liquid separator is connected to the ammonia water storage tank through the fourth liquid phase discharge pipeline.

4. A device for recovering ammonia and nitrous oxide in reaction tail gas according to claim 1, characterized in that: It also includes an ammonia water delivery pump, an ammonia water pump inlet pipeline and an ammonia water pump outlet pipeline. The ammonia water storage tank is connected to the ammonia water delivery pump through the ammonia water pump inlet pipeline, the ammonia water delivery pump is connected to the ammonia water pump outlet pipeline, and the ammonia water pump outlet pipeline is used for circulating water.

5. The device for recovering ammonia and nitrous oxide in reaction tail gas according to claim 1, characterized in that: It also includes a nitrous oxide liquid delivery pump, a nitrous oxide liquid pump inlet pipeline and a nitrous oxide liquid pump outlet pipeline. The nitrous oxide storage tank is connected to the nitrous oxide liquid delivery pump through the nitrous oxide liquid pump inlet pipeline, and the nitrous oxide liquid delivery pump is connected to the nitrous oxide liquid pump outlet pipeline.

6. A device for recovering ammonia and nitrous oxide in reaction tail gas according to claim 1, characterized in that: It also includes a washing tower circulation pump, a circulating liquid inlet pipeline and a circulating liquid outlet pipeline. A circulating liquid distributor is provided in the deammoniation washing tower. The washing tower circulation pump is connected to the outlet end of the deammoniation washing tower through the circulating liquid inlet pipeline. At the same time, the washing tower circulation pump is connected to the circulating liquid distributor through the circulating liquid outlet pipeline.

7. A device for recovering ammonia and nitrous oxide in reaction tail gas according to claim 1, characterized in that: The temperature range of the first low-temperature separator is -80°C to 77°C, and the temperature range of the second low-temperature separator is -100°C to 90°C.

8. The device for recovering ammonia and nitrous oxide in reaction tail gas according to claim 1, characterized in that: The gas entering the first gas-liquid separator from the first gas-phase discharge pipeline enters at a tangent line, and the gas entering the second low-temperature separator from the third gas-phase discharge pipeline enters at a tangent line.

Images