Liquid-cooled bypass system and anti-surge flexible ammonia synthesis system

Abstract

The utility model relates to the technical field of chemical engineering, in particular to a liquid-cooled bypass system and an anti-surge flexible ammonia synthesis system. The liquid-cooled bypass system comprises a return pipeline, a liquid ammonia storage tank, a liquid ammonia regulating valve, an atomizer and a temperature transmitting controller, the output end of the liquid ammonia storage tank is communicated with the input end of the liquid ammonia adjusting valve, the output end of the liquid ammonia adjusting valve is communicated with the input end of the atomizer, the output end of the atomizer is communicated with the backflow pipeline, and the temperature transmitting controller is installed on the backflow pipeline and located on one side of the output end of the atomizer. And the temperature transmitting controller is electrically connected with the liquid ammonia regulating valve. The liquid-cooled bypass system replaces a traditional water-cooled reflux cooler, the equipment scale and the operation energy consumption are reduced, and the anti-surge flexible ammonia synthesis system can ensure that the ammonia compressor is maintained in a low-load 30-50% operation interval for a long time without overtemperature and surge, so that the operation efficiency of the ammonia compressor is improved, and the service life of the ammonia compressor is prolonged. And the device can adapt to the production load change of a flexible ammonia synthesis system in a wide range.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical engineering, in particular to a liquid-cooled bypass system and an anti-surge flexible ammonia synthesis system. Background Technique

[0002] The electric energy generated from renewable resources such as wind and light is used in a flexible ammonia synthesis preparation device to produce (green) ammonia, which is of great significance for replacing the ammonia synthesis route using fossil energy and reducing the carbon footprint. However, the electric energy starting from renewable wind and light resources fluctuates greatly, and it is necessary to develop a flexible ammonia synthesis preparation system and process to adapt to this periodic load fluctuation. The main feature of the flexible ammonia synthesis preparation process is that the system and the main process equipment have high operating flexibility (usually in the load range of 30 - 110%), and the operation safety and economy of the equipment also need to be considered. The refrigeration unit is responsible for providing the liquid ammonia (cooling capacity) required for cooling and separation to the ammonia synthesis unit, which needs to change with the load change of the ammonia synthesis unit. This requires that the core equipment in the refrigeration unit, the ammonia compressor, has the characteristic of a wide regulation ratio, and relies on the bypass system set in the ammonia compressor to meet the process requirements.

[0003] Chinese invention patent with the publication number of CN116081644A discloses a flexible ammonia synthesis preparation system and process, including a compression unit for receiving and compressing raw material gases, a gas storage unit for buffering and supplementing gas, an ammonia synthesis unit for synthesizing ammonia and cooling and separating ammonia, a refrigeration unit for providing cooling capacity to the ammonia synthesis unit, and a waste heat power generation unit for power generation. By using the gas storage unit to reduce the influence of the upstream system load fluctuation, the ammonia synthesis preparation system can operate stably; by supplementing gas through the gas storage unit, there is no need to set up a supplementary gas compressor; the expansion generator uses the expansion gas of the gas storage unit to generate electricity and recover the potential energy of high-pressure gas. When the ammonia synthesis operates at a low load, the ammonia separation temperature and the synthesis gas components are adjusted to keep the operating pressure of the ammonia synthesis unit not lower than the set value and avoid equipment stress fatigue, so as to ensure the safe operation of the ammonia synthesis unit and realize the flexible and safe production of the ammonia synthesis preparation system.

[0004] In order to ensure that the ammonia compressor can maintain low-load operation, the above flexible ammonia synthesis preparation system and process specifically design a cooling system, which involves a preheater, a water cooler, an ammonia cooler and a separator. Its structure is too complex, the scale of the equipment is too large, and the energy consumption during operation is relatively high. Content of the Utility Model

[0005] The technical problem to be solved by the utility model is to provide a liquid-cooled bypass system and an anti-surge flexible ammonia synthesis system. The liquid-cooled bypass system replaces the traditional water-cooled reflux cooler, reduces the equipment scale and operating energy consumption, and the anti-surge flexible ammonia synthesis system can ensure that the ammonia compressor is maintained in a low-load operating range of 30-50% for a long time without overheating or surging, and can adapt to the production load changes of the flexible ammonia synthesis system in a wide range.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] First, the utility model provides a liquid-cooled bypass system, which includes a reflux pipeline, a liquid ammonia storage tank, a liquid ammonia regulating valve, an atomizer and a temperature transmitter controller; the output end of the liquid ammonia storage tank is connected to the input end of the liquid ammonia regulating valve, the output end of the liquid ammonia regulating valve is connected to the input end of the atomizer, the output end of the atomizer is connected to the reflux pipeline, the temperature transmitter controller is installed on the reflux pipeline and is located on one side of the atomizer output end, and the temperature transmitter controller is electrically connected to the liquid ammonia regulating valve.

[0008] In a second aspect, the utility model further provides an anti-surge flexible synthetic ammonia system, comprising the liquid-cooled bypass system provided in the first aspect, and further comprising: a drive motor, an ammonia compressor, a condenser, a gas-liquid separator and an anti-surge reflux valve, wherein the drive motor is drive-connected to the ammonia compressor, the output end of the gas-liquid separator is connected to the input end of the ammonia compressor, the output end of the ammonia compressor is connected to the input end of the reflux pipeline, the input end of the condenser is connected to the reflux pipeline, the output end of the condenser is connected to the input end of the liquid ammonia storage tank, the anti-surge reflux valve is installed on the reflux pipeline, the anti-surge reflux valve is located between the condenser and the atomizer, and the reflux pipeline is connected to the input end of the gas-liquid separator.

[0009] Furthermore, the ammonia compressor includes an ammonia compressor stage one and an ammonia compressor stage two, the gas-liquid separator includes a first gas-liquid separator and a second gas-liquid separator, the anti-surge reflux valve includes a first anti-surge reflux valve and a second anti-surge reflux valve; the liquid ammonia regulating valve includes a first liquid ammonia regulating valve and a second liquid ammonia regulating valve, the atomizer includes a first atomizer and a second atomizer, the reflux pipeline includes a first reflux pipeline and a second reflux pipeline, and the temperature transmitter controller includes a first temperature transmitter controller and a second temperature transmitter controller.

[0010] Furthermore, the output end of the first gas-liquid separator is connected to the input end of the first stage of the ammonia compressor, the output end of the second gas-liquid separator and the output end of the first stage of the ammonia compressor are both connected to the input end of the second stage of the ammonia compressor, the output end of the second stage of the ammonia compressor is respectively connected to the first reflux pipeline and the second reflux pipeline, the first anti-surge reflux valve, the first atomizer and the first temperature transmitter controller are all installed on the first reflux pipeline, the liquid ammonia storage tank is connected to the first atomizer through the first liquid ammonia regulating valve, the first liquid ammonia regulating valve and the first temperature transmitter controller are electrically connected, the second anti-surge reflux valve, the second atomizer and the second temperature transmitter controller are all installed on the second reflux pipeline, the liquid ammonia storage tank is connected to the second liquid ammonia regulating valve and the second atomizer, and the second liquid ammonia regulating valve and the second temperature transmitter controller are electrically connected.

[0011] Furthermore, it includes a first-stage flash tank and a second-stage flash tank, the first-stage flash tank is connected to the input end of the first gas-liquid separator, the second-stage flash tank is connected to the input end of the second gas-liquid separator, and the first-stage flash tank and the second-stage flash tank are respectively used to provide gas ammonia input support for the first gas-liquid separator and the second gas-liquid separator.

[0012] Furthermore, pressure and flow detectors are provided at the input and output ports of the first and second stages of the ammonia compressor.

[0013] Furthermore, it also includes an anti-surge controller, and the pressure and flow detectors and the anti-surge return valve are all electrically connected to the anti-surge controller.

[0014] Furthermore, the condenser is provided with a check valve, and the input end of the condenser is connected to the reflux pipeline through the check valve.

[0015] Furthermore, the ammonia compressor is a centrifugal compressor.

[0016] Furthermore, the driving motor is an induction asynchronous motor.

[0017] Beneficial effects of the utility model: The utility model discloses a liquid-cooled bypass system, including a reflux pipeline, a liquid ammonia storage tank, a liquid ammonia regulating valve, an atomizer and a temperature transmitter controller; the output end of the liquid ammonia storage tank is connected to the input end of the liquid ammonia regulating valve, the output end of the liquid ammonia regulating valve is connected to the input end of the atomizer, the output end of the atomizer is connected to the reflux pipeline, the temperature transmitter controller is installed on the reflux pipeline and is located on one side of the output end of the atomizer, and the temperature transmitter controller is electrically connected to the liquid ammonia regulating valve. The liquid ammonia storage tank is used to store liquid ammonia, the liquid ammonia regulating valve is used to throttle and reduce the pressure of liquid ammonia in the liquid ammonia storage tank, the atomizer is used to atomize the liquid ammonia, and at the same time, the atomized liquid ammonia is sprayed into the reflux pipeline, the temperature transmitter controller is usually installed at the end of the reflux pipeline, the temperature transmitter controller is used to monitor the temperature at the end of the reflux pipeline, and compare it with the set threshold temperature, and control the liquid ammonia regulating valve, so as to adjust the liquid ammonia flow rate to adjust the final reflux gas temperature. The utility model also discloses a surge-proof flexible ammonia synthesis system, which can ensure that the ammonia compressor is maintained in a low-load operating range of 30-50% for a long time without overheating or surge, and can adapt to production load changes of the flexible ammonia synthesis system in a wide range. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a flowchart of the first embodiment of the present utility model;

[0019] Figure 2 This is a flowchart of the second embodiment of the present invention.

[0020] Explanation of the reference numerals: reflux pipeline 1, first reflux pipeline 111, second reflux pipeline 112, liquid ammonia storage tank 2, liquid ammonia regulating valve 3, first liquid ammonia regulating valve 31, second liquid ammonia regulating valve 32, atomizer 4, first atomizer 41, second atomizer 42, temperature transmitter controller 5, first temperature transmitter controller 51, second temperature transmitter controller 52, drive motor 6, condenser 7, check valve 71, first stage ammonia compressor 8, second stage ammonia compressor 9, first gas-liquid separator 10, second gas-liquid separator 11, first anti-surge reflux valve 12, second anti-surge reflux valve 13, first stage flash tank 14, second stage flash tank 15, pressure and flow detector 16. DETAILED DESCRIPTION

[0021] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0022] It should be understood that the terms used herein are for the purpose of describing particular example embodiments only and are not intended to be limiting. Unless the context clearly dictates otherwise, the singular forms "a", "an", and "the" as used herein may also include the plural forms. The terms "comprising", "including", "containing", and "having" are inclusive and thus specify the presence of the stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless explicitly indicated as the order of performance. It should also be understood that additional or alternative steps may be used.

[0023] Although the terms first, second, third, etc. may be used herein to describe multiple elements, components, regions, layers, and / or sections, these elements, components, regions, layers, and / or sections should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or section from another. Unless the context clearly dictates otherwise, terms such as "first", "second", and other numerical terms when used herein do not imply an order or sequence. Thus, the first element, component, region, layer, or section discussed below may be referred to as the second element, component, region, layer, or section without departing from the teachings of the example embodiments.

[0024] For ease of description, spatial relative relationship terms may be used herein to describe the relationship of one element or feature to another element or feature as shown in the figures, such as "inner", "outer", "inside", "outside", "below", "beneath", "above", "over", etc. The meaning of such spatial relative relationship terms includes different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is flipped, an element described as "below" or "beneath" other elements or features will then be oriented "above" or "over" the other elements or features. Thus, the example term "below" can include both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used herein are to be interpreted accordingly.

[0025] Example 1:

[0026] As Figure 1As shown, the present embodiment provides a liquid-cooled bypass system, which includes a reflux pipeline 1, a liquid ammonia storage tank 2, a liquid ammonia regulating valve 3, an atomizer 4 and a temperature transmitter controller 5; the output end of the liquid ammonia storage tank 2 is connected to the input end of the liquid ammonia regulating valve 3, the output end of the liquid ammonia regulating valve 3 is connected to the input end of the atomizer 4, the output end of the atomizer 4 is connected to the reflux pipeline 1, the temperature transmitter controller 5 is installed on the reflux pipeline 1 and is located on one side of the output end of the atomizer 4, and the temperature transmitter controller 5 is electrically connected to the liquid ammonia regulating valve 3. In actual use, the liquid ammonia storage tank 2 is used to store liquid ammonia, the liquid ammonia regulating valve 3 is used to throttle and reduce the pressure of the liquid ammonia in the liquid ammonia storage tank 2, the atomizer 4 is used to atomize the liquid ammonia, and spray the atomized liquid ammonia into the return pipeline 1. The temperature transmitter controller 5 is usually installed at the end of the return pipeline 1. The temperature transmitter controller 5 is used to monitor the temperature at the end of the return pipeline 1 and compare it with the set threshold temperature to control the liquid ammonia regulating valve 3, thereby adjusting the liquid ammonia flow rate to adjust the final return gas temperature. degree; the liquid ammonia from the liquid ammonia storage tank 2 is throttled and depressurized by the regulating valve 3, and then sprayed into the reflux pipeline 1 through the atomizer 4 to mix with the high-temperature and high-pressure gas in the reflux pipeline 1. The atomized liquid ammonia quickly evaporates, absorbs heat, and gasifies, thereby cooling the high-temperature airflow in the reflux pipeline 1. The temperature of the reflux gas is monitored by the temperature transmitter controller 5 arranged at the end of the reflux pipeline 1, and the liquid ammonia regulating valve 3 is controlled to adjust the liquid ammonia flow rate and the temperature of the mixed reflux gas, thereby achieving the purpose of cooling the high-temperature gas in the reflux pipeline 1.

[0027] Embodiment 2:

[0028] like Figure 2As shown in the figure, on the basis of Embodiment 1, the present utility model further provides an anti-surge flexible synthetic ammonia system, which includes the liquid-cooled bypass system provided in the above Embodiment 1, and further includes a drive motor 6, an ammonia compressor, a condenser 7, a gas-liquid separator, and an anti-surge reflux valve. The drive motor 6 is drivingly connected to the ammonia compressor. The output end of the gas-liquid separator is communicated with the input end of the ammonia compressor. The output end of the ammonia compressor is communicated with the input end of the reflux pipeline 1. The input end of the condenser 7 is communicated with the reflux pipeline 1. The output end of the condenser 7 is communicated with the input end of the liquid ammonia storage tank 2. The anti-surge reflux valve is installed on the reflux pipeline 1. The anti-surge reflux valve is located between the condenser 7 and the atomizer 4. The reflux pipeline 1 is communicated with the input end of the gas-liquid separator. During actual use, after the liquid droplets are separated by the gas-liquid separator, the remaining gaseous ammonia enters the ammonia compressor for treatment. The high-temperature and high-pressure gaseous ammonia at the outlet of the ammonia compressor enters the condenser 7 through the reflux pipeline 1 for condensation and flows into the liquid ammonia storage tank 2 by gravity. When the load of the ammonia compressor is lower than the minimum load that it can maintain, it is necessary to partially open the anti-surge reflux valve. At this time, the reflux pipeline 1 is opened, and the high-temperature gaseous ammonia is cooled by the liquid-cooled bypass system. Then, the cooled gaseous ammonia enters the ammonia compressor again through the gas-liquid separator for circulation, which can effectively avoid the overheating and damage of the ammonia compressor caused by the high-temperature gaseous ammonia, without setting a reflux cooler and continuously introducing cooling water, reducing the cooling water circulation volume and operating energy consumption, and at the same time ensuring that the ammonia compressor can be maintained in the low-load operation range for a long time.

[0029] In this embodiment, the ammonia compressor includes an ammonia compressor stage 8 and an ammonia compressor stage 2 9, the gas-liquid separator includes a first gas-liquid separator 10 and a second gas-liquid separator 11, the anti-surge reflux valve includes a first anti-surge reflux valve 12 and a second anti-surge reflux valve 13; the liquid ammonia regulating valve 3 includes a first liquid ammonia regulating valve 31 and a second liquid ammonia regulating valve 32, the atomizer 4 includes a first atomizer 41 and a second atomizer 42, the reflux pipeline 1 includes a first reflux pipeline 111 and a second reflux pipeline 112, and the temperature transmitter control The device 5 includes a first temperature transmitter controller 51 and a second temperature transmitter controller 52; the output end of the first gas-liquid separator 10 is connected to the input end of the first stage of the ammonia compressor 8, the output end of the second gas-liquid separator 11 and the output end of the first stage of the ammonia compressor 8 are both connected to the input end of the second stage of the ammonia compressor 9, and the output end of the second stage of the ammonia compressor 9 is respectively connected to the first reflux pipeline 111 and the second reflux pipeline 112, the first anti-surge reflux valve 12, the first atomizer 41 and the first temperature transmitter controller 51 are all installed on the first reflux pipeline 111. 11, the liquid ammonia storage tank 2 is connected to the first atomizer 41 through the first liquid ammonia regulating valve 31, the first liquid ammonia regulating valve 31 is electrically connected to the first temperature transmitter controller 51, the second anti-surge reflux valve 32, the second atomizer 42 and the second temperature transmitter controller 52 are all installed in the second reflux pipeline 112, the liquid ammonia storage tank 2 is connected to the second atomizer 42 through the second liquid ammonia regulating valve 32, the second liquid ammonia regulating valve 32 and the second temperature transmitter controller 52 are electrically connected, including a first flash tank 14 and a second flash tank 15, the first The first-stage flash tank 14 is connected to the input end of the first gas-liquid separator 10, and the second-stage flash tank 15 is connected to the input end of the second gas-liquid separator 11. The first-stage flash tank 14 and the second-stage flash tank 15 are respectively used to provide gas ammonia input support for the first gas-liquid separator 10 and the second gas-liquid separator 11; the first-stage ammonia compressor 8 and the second-stage ammonia compressor 9 are both provided with pressure and flow detectors 16 at the input and output ports; an anti-surge controller is also included, and the pressure and flow detectors 16 and the anti-surge reflux valve are both electrically connected to the anti-surge controller.

[0030] In actual use, the gas ammonia from the first stage flash tank 14 passes through the first gas-liquid separator 10, and after the liquid droplets are separated, it enters the first stage compressor 8 for compression; the gas ammonia from the second stage flash tank 15 passes through the second gas-liquid separator 11, after the liquid droplets are separated, it is mixed with the high-temperature gas ammonia from the first stage compression in the cylinder, and then enters the second stage ammonia compressor 9 together; the high-temperature and high-pressure gas ammonia at the outlet of the second stage ammonia compressor 9 enters the condenser 7 for condensation and flows into the liquid ammonia storage tank 2 by gravity. Pressure and flow detectors 16 are provided at the input and output ports of the first stage ammonia compressor 8 and the second stage ammonia compressor 9, and the relevant signals are transmitted to the anti-surge controller for calculating the comparison between the operating point of the ammonia compressor and the anti-surge control point. The control signal output by the anti-surge controller is used to control the switching and adjustment of the first anti-surge reflux valve 12 and the second anti-surge reflux valve 13. When the load of the ammonia compressor is lower than the minimum load it can maintain, it is necessary to partially open the first anti-surge reflux valve 12 and the second anti-surge reflux valve 13 to maintain sufficient flow in the first stage 8 and the second stage 9 of the ammonia compressor, respectively, to ensure that the machine does not enter the surge zone. At this time, the first liquid ammonia regulating valve 31 and the second liquid ammonia regulating valve 32 are synchronously partially opened, and the liquid ammonia medium from the liquid ammonia storage tank 2 is throttled and depressurized through the first liquid ammonia regulating valve 31 and the second liquid ammonia regulating valve 32, and then atomized through the first atomizer 41 and the second atomizer 42, and contacted and mixed with the high-temperature gas ammonia from the outlet of the second stage 9 of the ammonia compressor. The atomized droplets quickly absorb heat and vaporize, thereby achieving the purpose of cooling the mixed gas. The injection amount of atomized liquid ammonia is controlled by the first temperature transmitter controller 51 and the second temperature transmitter controller 52 after mixing. Through the design of the above reflux system, it can be ensured that the ammonia compressor is maintained in the low load 30-50% operating range for a long time without overheating or surging, and can adapt to the production load changes of the flexible ammonia synthesis system in a wide range.

[0031] In this embodiment, the condenser is provided with a check valve, and the input end of the condenser is connected to the reflux pipeline through the check valve. In actual use, the check valve is used to prevent the gaseous ammonia entering the condenser from flowing back into the reflux pipeline, and the ammonia liquid after condensation by the condenser from flowing back into the reflux pipeline.

[0032] In this embodiment, the ammonia compressor is a centrifugal compressor. In actual use, the centrifugal compressor has a large flow processing capacity, high power density, and stable and reliable operation.

[0033] In this embodiment, the driving motor is an induction asynchronous motor. In actual use, the driving motor is an induction asynchronous motor with simple structure and reliable operation, which can meet the flexible operation requirements of the ammonia synthesis system for the ammonia compressor in combination with variable frequency speed regulation.

[0034] All technical features in this embodiment can be freely combined according to actual needs. The above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention. The technologies, shapes, and structures not described in detail in the present invention are all well-known technologies.

[0035] The above embodiments are the preferred implementation solutions of the present invention. In addition, there are other implementation methods. Any obvious replacement without departing from the concept of the technical solution is within the protection scope of the present invention.

Claims

1. A liquid-cooled bypass system, characterized in that: The invention comprises a reflux pipeline (1), a liquid ammonia storage tank (2), a liquid ammonia regulating valve (3), an atomizer (4) and a temperature transmitter controller (5); the output end of the liquid ammonia storage tank (2) is connected to the input end of the liquid ammonia regulating valve (3), the output end of the liquid ammonia regulating valve (3) is connected to the input end of the atomizer (4), the output end of the atomizer (4) is connected to the reflux pipeline (1), the temperature transmitter controller (5) is installed on the reflux pipeline (1) and is located on one side of the output end of the atomizer (4), and the temperature transmitter controller (5) and the liquid ammonia regulating valve (3) are electrically connected.

2. A surge-proof flexible synthetic ammonia system, characterized in that, It comprises the liquid-cooled bypass system as claimed in claim 1, and also comprises a driving motor (6), an ammonia compressor, a condenser (7), a gas-liquid separator and an anti-surge reflux valve, wherein the driving motor (6) is drivingly connected to the ammonia compressor, the output end of the gas-liquid separator is connected to the input end of the ammonia compressor, the output end of the ammonia compressor is connected to the input end of the reflux pipeline (1), the input end of the condenser (7) is connected to the reflux pipeline (1), the output end of the condenser (7) is connected to the input end of the liquid ammonia storage tank (2), the anti-surge reflux valve is installed on the reflux pipeline (1), the anti-surge reflux valve is located between the condenser (7) and the atomizer (4), and the reflux pipeline (1) is connected to the input end of the gas-liquid separator.

3. The anti-surge flexible synthetic ammonia system according to claim 2, characterized in that: The ammonia compressor comprises an ammonia compressor stage (8) and an ammonia compressor stage (9); the gas-liquid separator comprises a first gas-liquid separator (10) and a second gas-liquid separator (11); the anti-surge reflux valve comprises a first anti-surge reflux valve (12) and a second anti-surge reflux valve (13); the liquid ammonia regulating valve (3) comprises a first liquid ammonia regulating valve (31) and a second liquid ammonia regulating valve (32); the atomizer (4) comprises a first atomizer (41) and a second atomizer (42); the reflux pipeline (1) comprises a first reflux pipeline (111) and a second reflux pipeline (112); and the temperature transmitter controller (5) comprises a first temperature transmitter controller (51) and a second temperature transmitter controller (52).

4. The anti-surge flexible synthetic ammonia system according to claim 3, characterized in that: The output end of the first gas-liquid separator (10) is communicated with the input end of the first stage of the ammonia compressor (8). The output ends of the second gas-liquid separator (11) and the first stage of the ammonia compressor (8) are both communicated with the input end of the second stage of the ammonia compressor (9). The output end of the second stage of the ammonia compressor (9) is respectively communicated with a first reflux pipeline (111) and a second reflux pipeline (112). The first anti-surge reflux valve (12), the first atomizer (41) and the first temperature transmitter controller (51) are all installed on the first reflux pipeline (111). The liquid ammonia storage tank (2) is communicated with the first atomizer (41) through the first liquid ammonia regulating valve (31). The first liquid ammonia regulating valve (31) is electrically connected with the first temperature transmitter controller (51). The second anti-surge reflux valve (13), the second atomizer (42) and the second temperature transmitter controller (52) are all installed on the second reflux pipeline (112). The liquid ammonia storage tank (2) is communicated with the second atomizer (42) through the second liquid ammonia regulating valve (32). The second liquid ammonia regulating valve (32) is electrically connected with the second temperature transmitter controller (52).

5. The anti-surge flexible synthetic ammonia system according to claim 3, characterized in that: It includes a first-stage flash tank (14) and a second-stage flash tank (15). The first-stage flash tank (14) is communicated with the input end of the first gas-liquid separator (10). The second-stage flash tank (15) is communicated with the input end of the second gas-liquid separator (11). The first-stage flash tank (14) and the second-stage flash tank (15) are respectively used to provide gas ammonia input support for the first gas-liquid separator (10) and the second gas-liquid separator (11).

6. The anti-surge flexible synthetic ammonia system according to claim 3, characterized in that: Pressure and flow detectors (16) are arranged at the input and output ports of the first stage of the ammonia compressor (8) and the second stage of the ammonia compressor (9).

7. The anti-surge flexible synthetic ammonia system according to claim 6, characterized in that: It further includes an anti-surge controller. The pressure and flow detectors (16) and the anti-surge reflux valve are both electrically connected with the anti-surge controller.

8. The anti-surge flexible synthetic ammonia system according to claim 2, characterized in that: A check valve (71) is arranged on the condenser (7). The input end of the condenser (7) is communicated with the reflux pipeline (1) through the check valve (71).

9. The anti-surge flexible synthetic ammonia system according to claim 2, characterized in that: The ammonia compressor adopts a centrifugal compressor.

10. The anti-surge flexible synthetic ammonia system according to claim 2, wherein: The drive motor (6) adopts an induction asynchronous motor.

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