Energy-saving ammonia supplementing structure of ammonia synthesizer cooler

Abstract

The utility model relates to synthetic ammonia cooler energy -conserving supplementary ammonia technical field discloses synthetic ammonia cooler energy -conserving supplementary ammonia structure, including synthetic ammonia cooler, liquid ammonia flash tank, ice machine hydrogen storage ware, be provided with control assembly on the ice machine hydrogen storage ware. In the utility model, through the adjusting assembly of electric control valve of supplementary ammonia main valve pipe, supplementary ammonia side valve pipe, loop pipeline, emptying valve pipe, cooperate filter, pressure transmitter over's filter / detection assembly, and the gas ammonia recovery design of gas ammonia output pipe, and due to the liquid ammonia of liquid ammonia flash tank after step -by -step decompression, the incondensable gas content is little, the pressure is also low, directly to synthetic ammonia cooler supplementary ammonia, the impact on the ice machine system is almost nothing, thereby guaranteeing synthetic system stable operation, realizing multi -path supplementary ammonia, liquid ammonia impurity filtration, supplementary ammonia pressure stable control, gas ammonia recovery reduces consumption, guarantees pipeline seal leak -proof simultaneously, achieves the effect that supplementary ammonia process energy -conserving, stable, safe and intelligent.

Description

Technical Field

[0001] This utility model relates to the field of energy-saving ammonia replenishment technology for synthetic ammonia coolers, and in particular to an energy-saving ammonia replenishment structure for synthetic ammonia coolers. Background Technology

[0002] The ammonia cooler is the core heat exchange equipment in the ammonia synthesis process. It further cools the process gas after the synthesis water cooler by absorbing heat from the evaporation of liquid ammonia, which promotes the condensation and separation of gaseous ammonia and directly affects the production efficiency and product purity of the synthesis system.

[0003] The existing ammonia replenishment structure for the synthetic ammonia cooler is as follows: the liquid ammonia in the synthetic ammonia cooler is continuously supplied by the liquid ammonia in the ice machine's ammonia storage tank. The liquid ammonia in the ice machine's ammonia storage tank is formed by the condensation and storage of gaseous ammonia evaporated from the synthetic ammonia cooler after being compressed by the ice machine. When the liquid level in the ice machine's ammonia storage tank is low, the liquid ammonia in the synthetic ammonia cooler needs to be replenished from the liquid ammonia in the synthetic heat exchanger. After the liquid level in the ice machine's ammonia storage tank is restored, the ammonia replenishment valve from the heat exchanger to the synthetic ammonia cooler is closed, and the liquid ammonia in the ice machine's ammonia storage tank continues to be used for stable production, continuously recycling the system. Because the liquid ammonia in the synthetic heat exchanger contains a large amount of non-condensable process gas, after replenishment, it is difficult to compress and condense after being sent to the refrigeration ice machine along with the evaporated gaseous ammonia, which increases the ice machine's exhaust pressure, increases the ice machine's load, and increases power consumption.

[0004] Existing ammonia replenishment structures for synthetic ammonia coolers, while achieving basic ammonia replenishment, suffer from several drawbacks. The liquid ammonia in the heat exchanger contains a significant amount of non-condensable gases, leading to increased refrigeration pressure and load after replenishment. This not only increases power consumption but also necessitates frequent venting and pressure relief to prevent cooler shutdown, resulting in ammonia resource waste. Furthermore, the lack of effective monitoring and automatic adjustment of replenishment pressure leads to large pressure fluctuations that negatively impact the cooler's heat exchange efficiency, causing abnormal process gas temperatures, increased system pressure, and even reduced production. In addition, the ammonia recovery path is inadequate, residual liquid ammonia in the pipelines after replenishment is prone to vaporization, manual operation is inaccurate and labor-intensive, high-pressure replenishment carries the risk of cross-pressure, and insufficient pipeline sealing design can easily cause leaks. These shortcomings fail to meet the current demands of the synthetic ammonia industry for energy conservation, stable production, safety, environmental protection, and intelligent control. Therefore, this energy-saving ammonia replenishment structure for synthetic ammonia coolers is proposed to address these issues. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides an energy-saving ammonia replenishment structure for synthetic ammonia coolers. It aims to solve the problems in the existing technology, such as high non-condensable gas content of liquid ammonia, lack of effective control over ammonia replenishment pressure, imperfect ammonia recovery path, high dependence on manual operation, and insufficient pipeline sealing safety. These problems lead to a surge in ice machine load, high power and ammonia consumption, unstable production system, and potential safety and environmental hazards, making it difficult to meet the energy-saving, consumption-reducing, safety, environmental protection, and intelligent control requirements of the synthetic ammonia industry.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an energy-saving ammonia replenishment structure for a synthetic ammonia cooler, comprising a synthetic ammonia cooler, a liquid ammonia flash evaporation tank, and an ice machine hydrogen storage tank, wherein a control component is provided on the ice machine hydrogen storage tank, and an ammonia replenishment pipeline assembly is provided between the synthetic ammonia cooler, the liquid ammonia flash evaporation tank, and the ice machine hydrogen storage tank;

[0007] The ammonia replenishment pipeline assembly includes a main ammonia replenishment valve, a secondary ammonia replenishment valve, and a gaseous ammonia output pipe. One end of the main ammonia replenishment valve is sealed and connected to the liquid phase outlet of the liquid ammonia flash evaporation tank, and one end of the secondary ammonia replenishment valve is sealed and connected to the liquid phase outlet of the ice machine hydrogen storage unit. A four-way fitting is fixedly connected between the other ends of the main ammonia replenishment valve and the secondary ammonia replenishment valve. A filter is fixedly connected to the top of the four-way fitting. A liquid ammonia supply pipe is fixedly connected inside the top of the filter to the ammonia replenishment port of the synthetic ammonia cooler. A pressure transmitter is fixedly installed on the liquid ammonia supply pipe. The gaseous ammonia output pipe is fixedly connected between the synthetic ammonia cooler and the liquid ammonia flash evaporation tank. A loop pipeline is connected through the gaseous ammonia output pipe and the four-way fitting. A vent valve is fixedly connected to the end of the loop pipeline.

[0008] As a further description of the above technical solution:

[0009] The main ammonia replenishment valve, the auxiliary ammonia replenishment valve, the circuit pipeline, and the vent valve are all equipped with electrically controlled valves.

[0010] As a further description of the above technical solution:

[0011] The four-way fitting is sealed and welded to the main ammonia replenishment valve, the secondary ammonia replenishment valve, the filter, and the circuit pipeline.

[0012] As a further description of the above technical solution:

[0013] The filter comprises a housing, a filter element, and a sealing cap. The filter element is fixedly connected to the bottom end of the sealing cap, and the housing and the sealing cap are threaded together. The end of the liquid ammonia supply pipe away from the synthetic ammonia cooler extends through the sealing cap to the bottom end of the filter element.

[0014] As a further description of the above technical solution:

[0015] One end of the gaseous ammonia output pipe is sealed and connected to the reflux port of the liquid ammonia flash evaporation tank, and the other end of the gaseous ammonia output pipe is fixedly connected to the gaseous ammonia output port of the synthetic ammonia cooler.

[0016] As a further description of the above technical solution:

[0017] The control component includes a control processor, a low liquid level sensor, and a high liquid level sensor. The outer wall of the control processor is fixedly connected to the outer wall of the ice machine hydrogen storage tank, and the outer walls of the low liquid level sensor and the high liquid level sensor are fixedly connected to the inner wall of the ice machine hydrogen storage tank.

[0018] As a further description of the above technical solution:

[0019] The control processor includes a receiving module and an execution module. The control processor receives signals from the low liquid level sensor, the high liquid level sensor, the liquid level detection unit, and the liquid ammonia supply pipe pressure monitoring unit through the receiving module. The execution module controls the opening degree and opening / closing status of each electrically controlled valve in the main ammonia supply valve, the auxiliary ammonia supply valve, the loop pipeline, and the vent valve.

[0020] As a further description of the above technical solution:

[0021] The high liquid level sensor and the low liquid level sensor are arranged from top to bottom.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, the adjustment components of the electrically controlled valves of the main ammonia replenishment valve pipe, the secondary ammonia replenishment valve pipe, the loop pipeline, and the vent valve pipe, combined with the filter / detection components of the filter and pressure transmitter, and the gas ammonia recovery design of the gas ammonia output pipe, and because the liquid ammonia in the liquid ammonia flash tank has very little non-condensable gas content and low pressure after being depressurized in stages, it can directly replenish ammonia to the synthetic ammonia cooler with almost no impact on the ice machine system, thereby ensuring the stable operation of the synthesis system, realizing multi-path ammonia replenishment, liquid ammonia impurity filtration, stable control of ammonia replenishment pressure, and gas ammonia recovery to reduce consumption, while ensuring pipeline sealing to prevent leakage, achieving the effect of energy saving, stability, safety and intelligence in the ammonia replenishment process.

[0024] 2. In this utility model, the control processor of the control component, the detection components of the low liquid level sensor and the high liquid level sensor receive liquid level and pressure signals and control the adjustment components of the electric control valves of the main ammonia replenishment valve pipe, the secondary ammonia replenishment valve pipe, the loop pipeline and the vent valve pipe, thereby realizing the automation and precision of the ammonia replenishment process, reducing the intensity of manual operation, and improving the system's operational stability and energy-saving effect. Attached Figure Description

[0025] Figure 1 This is a three-dimensional front view of the overall energy-saving ammonia replenishment structure for the synthetic ammonia cooler proposed in this utility model.

[0026] Figure 2 This is a rear-view three-dimensional schematic diagram of the energy-saving ammonia replenishment structure for the synthetic ammonia cooler proposed in this utility model.

[0027] Figure 3This is a schematic diagram of the disassembled structure of the ammonia replenishment pipeline assembly in the energy-saving ammonia replenishment structure of the synthetic ammonia cooler proposed in this utility model.

[0028] Figure 4 This is a schematic diagram of the cross-sectional control processor structure at the hydrogen storage unit of the ice machine in the energy-saving ammonia replenishment structure of the synthetic ammonia cooler proposed in this utility model.

[0029] Legend:

[0030] 1. Ammonia Synthesis Cooler; 2. Liquid Ammonia Flash Evaporation Tank; 3. Ice Machine Hydrogen Storage Tank; 4. Ammonia Replenishment Pipeline Assembly; 41. Main Ammonia Replenishment Valve Pipe; 42. Secondary Ammonia Replenishment Valve Pipe; 43. Pipe Fittings Four-Way; 44. Filter; 45. Liquid Ammonia Supply Pipe; 46. Pressure Transmitter; 47. Gaseous Ammonia Output Pipe; 48. Loop Pipeline; 49. Vent Valve Pipe; 5. Control Components; 51. Control Processor; 52. Low Liquid Level Sensor; 53. High Liquid Level Sensor. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Reference Figures 1-3This utility model provides an embodiment of an energy-saving ammonia replenishment structure for a synthetic ammonia cooler, comprising a synthetic ammonia cooler 1, a liquid ammonia flash evaporation tank 2, and an ice machine hydrogen storage tank 3. An ammonia replenishment pipeline assembly 4 is provided between the synthetic ammonia cooler 1, the liquid ammonia flash evaporation tank 2, and the ice machine hydrogen storage tank 3. The ammonia replenishment pipeline assembly 4 is the core pipeline system for the transportation of liquid ammonia and gaseous ammonia between the various devices, realizing multi-path ammonia replenishment and loop control. The ammonia replenishment pipeline assembly 4 includes a main ammonia replenishment valve pipe 41, a secondary ammonia replenishment valve pipe 42, and a gaseous ammonia output pipe 47. The main ammonia replenishment valve pipe 41 is the main passage for supplying low-noncondensable liquid ammonia from the liquid ammonia flash evaporation tank 2 to the synthetic ammonia cooler 1. The secondary ammonia replenishment valve pipe 42 is a backup ammonia replenishment passage for the ice machine hydrogen storage tank 3. The gaseous ammonia output pipe 47 is used for the return of gaseous ammonia from the synthetic ammonia cooler 1 to the liquid ammonia flash evaporation tank 2. One end of the main ammonia supply valve 41 is sealed and connected to the liquid phase outlet of the liquid ammonia flash evaporation tank 2. One end of the ammonia replenishment auxiliary valve 42 is sealed and connected to the liquid phase outlet of the ice machine hydrogen storage tank 3. A four-way fitting 43 is fixedly connected between the other ends of the main ammonia supply valve 41 and the auxiliary ammonia supply valve 42. The four-way fitting 43 is the core component for the sealed connection of multiple pipelines, realizing the centralized connection of the main and auxiliary ammonia supply pipelines, the filter 44 and the loop pipeline 48. A filter 44 is fixedly connected to the top of the four-way fitting 43. The filter 44 is used to filter impurities in the liquid ammonia to avoid clogging of subsequent pipelines and heat exchange components of the ammonia synthesis cooler 1. A liquid ammonia supply pipe 45 is fixedly connected to the ammonia replenishment port of the ammonia synthesis cooler 1 inside the top of the filter 44. The liquid ammonia supply pipe 45 is the final pipeline for transporting filtered liquid ammonia to the ammonia synthesis cooler 1. The ammonia supply pipe 44, comprising a housing, a filter element, and a sealing cap, ensures a stable supply of liquid ammonia. The filter element is fixedly connected to the bottom of the sealing cap, and the housing and sealing cap are threaded together. The end of the liquid ammonia supply pipe 45 furthest from the ammonia synthesis cooler 1 extends through the sealing cap to the bottom of the filter element. This structure facilitates the removal and replacement of the filter element while ensuring complete filtration of the liquid ammonia, thus improving filtration efficiency. A pressure transmitter 46 is fixedly installed on the liquid ammonia supply pipe 45, which monitors the pressure of the ammonia supply line in real time, providing pressure feedback to the control component 5 to ensure stable ammonia supply pressure. A gaseous ammonia output pipe 47 is fixedly connected between the ammonia synthesis cooler 1 and the liquid ammonia flash tank 2, with one end of the gaseous ammonia output pipe 47 connected to the liquid ammonia flash tank 2. The return port is sealed and connected. The other end of the ammonia output pipe 47 is fixedly connected to the ammonia output port of the ammonia synthesis cooler 1. The ammonia output pipe 47 realizes the recovery and utilization of ammonia in the ammonia synthesis cooler 1, reduces ammonia consumption, and maintains system pressure balance. A loop line 48 is connected between the ammonia output pipe 47 and the four-way fitting 43. The ammonia output pipe 47 realizes the recovery and utilization of ammonia in the ammonia synthesis cooler 1, reduces ammonia consumption, and maintains system pressure balance. The four-way fitting 43 is sealed and welded to the ammonia replenishment main valve pipe 41, the ammonia replenishment auxiliary valve pipe 42, the filter 44, and the loop line 48. The sealing and welding ensures the sealing of each pipeline connection, prevents leakage of liquid ammonia and ammonia gas, and improves the safety and reliability of the equipment. An vent valve pipe 49 is fixedly connected to the end of the loop line 48.The vent valve pipe 49 is used to discharge the gas and residual liquid ammonia in the loop pipeline 48, so as to avoid non-condensable gas entering the system and affecting the operation of the ice machine hydrogen storage device 3 and the ammonia synthesis cooler 1. The main ammonia replenishment valve pipe 41, the auxiliary ammonia replenishment valve pipe 42, the loop pipeline 48, and the vent valve pipe 49 are all provided with electric control valves, which can realize automatic opening, closing and opening adjustment through the control assembly 5, so as to improve the accuracy and intelligence level of the ammonia replenishment process.

[0033] With reference to Figure 1 , Figure 2 , and Figure 4 , the ice machine hydrogen storage device 3 is provided with a control assembly 5, which is the intelligent control core of the entire ammonia replenishment structure, and realizes the joint control of liquid level and pressure. The control assembly 5 includes a control processor 51, a low liquid level sensor 52, and a high liquid level sensor 53. The liquid level of the ice machine hydrogen storage device 3 is monitored in real time through the liquid level sensors to provide trigger signals for the ammonia replenishment process. The outer wall of the control processor 51 is fixedly connected to the outer wall of the ice machine hydrogen storage device 3, and the outer walls of the low liquid level sensor 52 and the high liquid level sensor 53 are fixedly connected to the inner wall of the ice machine hydrogen storage device 3. The high liquid level sensor 53 and the low liquid level sensor 52 are arranged in a distribution from top to bottom. The high and low liquid level sensors form liquid level interval control to realize automatic start and stop triggering of ammonia replenishment. The control processor 51 includes a receiving module and an execution module. The control processor 51 receives signals from the liquid level detection units of the low liquid level sensor 52 and the high liquid level sensor 53 and the pressure monitoring unit of the ammonia replenishment pipeline of the liquid ammonia supply pipe 45 through the receiving module, and controls the opening and closing states as well as the opening degrees of the electric control valves on the main ammonia replenishment valve pipe 41, the auxiliary ammonia replenishment valve pipe 42, the loop pipeline 48 and the vent valve pipe 49 through the execution module. This joint control realizes the automation and precision of the ammonia replenishment process, reduces the intensity of manual operation, and improves the system operation stability and energy-saving effect.

[0034] Working principle: When the low liquid level sensor 52 of the ice machine hydrogen storage tank 3 detects that the liquid level is lower than the set value, the control processor 51 of the control component 5 triggers the ammonia replenishment process: First, the electric control valves of the loop pipeline 48 and the vent valve 49 are opened to vent the gas in the ammonia replenishment pipeline. Then, the electric control valve of the main ammonia replenishment valve 41 is opened. The liquid ammonia with low non-condensable gas in the liquid ammonia flash tank 2 enters the filter 44 through the main ammonia replenishment valve 41 and the four-way fitting 43 to filter impurities. Then, it is transported to the synthetic ammonia cooler 1 through the liquid ammonia supply pipe 45. During this period, the pressure transmitter 46 monitors the ammonia replenishment pressure in real time and feeds it back to the control processor 51 to adjust the valve opening to ensure the pressure. Stable operation: When the high liquid level sensor 53 detects that the liquid level has reached the target, the control processor 51 closes the valve of the main ammonia replenishment valve pipe 41 and simultaneously opens the loop pipeline 48 and the vent valve pipe 49 to vent the residual liquid ammonia in the pipeline. If the main ammonia replenishment valve pipe 41 fails, the auxiliary ammonia replenishment valve pipe 42 is activated as a backup path to ensure the continuity of ammonia replenishment. In addition, the gaseous ammonia generated by the ammonia synthesis cooler 1 flows back to the liquid ammonia flash tank 2 through the gaseous ammonia output pipe 47 to achieve gaseous ammonia recovery. The entire process is fully automated by the control component 5. Through the closed-loop process of "venting gas - stable ammonia replenishment - venting residual liquid - gaseous ammonia recovery", the ammonia synthesis cooler 1 achieves energy saving and stable ammonia replenishment.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An energy-saving ammonia replenishment structure for a synthetic ammonia cooler, comprising a synthetic ammonia cooler (1), a liquid ammonia flash evaporation tank (2), and an ice machine hydrogen storage tank (3), characterized in that: The ice machine hydrogen storage tank (3) is equipped with a control component (5), and an ammonia replenishment pipeline assembly (4) is provided between the synthetic ammonia cooler (1), the liquid ammonia flash tank (2), and the ice machine hydrogen storage tank (3). The ammonia replenishment pipeline assembly (4) includes an ammonia replenishment main valve pipe (41), an ammonia replenishment auxiliary valve pipe (42), and a gaseous ammonia output pipe (47). One end of the ammonia replenishment main valve pipe (41) is sealed and connected to the liquid phase outlet of the liquid ammonia flash evaporation tank (2), and one end of the ammonia replenishment auxiliary valve pipe (42) is sealed and connected to the liquid phase outlet of the ice machine hydrogen storage tank (3). A four-way fitting (43) is fixedly connected between the other ends of the ammonia replenishment main valve pipe (41) and the ammonia replenishment auxiliary valve pipe (42). A filter is fixedly connected to the top end of the four-way fitting (43). (44) The top of the filter (44) is fixedly connected to the ammonia supply port of the ammonia synthesizer (1) by a liquid ammonia supply pipe (45). A pressure transmitter (46) is fixedly installed on the liquid ammonia supply pipe (45). The gas ammonia output pipe (47) is fixedly connected between the ammonia synthesizer (1) and the liquid ammonia flash tank (2). A loop line (48) is connected between the gas ammonia output pipe (47) and the pipe fitting four-way (43). An air vent valve pipe (49) is fixedly connected to the end of the loop line (48).

2. The energy-saving ammonia replenishment structure for a synthetic ammonia cooler according to claim 1, characterized in that: Electric control valves are provided on the main ammonia replenishment valve pipe (41), the auxiliary ammonia replenishment valve pipe (42), the circuit pipeline (48), and the vent valve pipe (49).

3. The energy-saving ammonia replenishment structure for a synthetic ammonia cooler according to claim 1, characterized in that: The four-way fitting (43) is sealed and welded to the main ammonia supply valve (41), the secondary ammonia supply valve (42), the filter (44), and the circuit pipeline (48).

4. The energy-saving ammonia replenishment structure for a synthetic ammonia cooler according to claim 1, characterized in that: The filter (44) comprises a shell, a filter core, and a sealing cap, wherein the filter core is fixedly connected to the bottom end of the sealing cap, the shell and the sealing cap are threaded together, and the end of the liquid ammonia supply pipe (45) away from the synthetic ammonia cooler (1) extends through the sealing cap to the bottom end of the filter core.

5. The energy-saving ammonia replenishment structure for a synthetic ammonia cooler according to claim 1, characterized in that: One end of the gaseous ammonia output pipe (47) is sealed and connected to the reflux port of the liquid ammonia flash evaporation tank (2), and the other end of the gaseous ammonia output pipe (47) is fixedly connected to the gaseous ammonia output port of the synthetic ammonia cooler (1).

6. The energy-saving ammonia replenishment structure for a synthetic ammonia cooler according to claim 1, characterized in that: The control component (5) includes a control processor (51), a low liquid level sensor (52), and a high liquid level sensor (53). The outer wall of the control processor (51) is fixedly connected to the outer wall of the ice machine hydrogen storage tank (3), and the outer walls of the low liquid level sensor (52) and the high liquid level sensor (53) are fixedly connected to the inner wall of the ice machine hydrogen storage tank (3).

7. The energy-saving ammonia replenishment structure for a synthetic ammonia cooler according to claim 6, characterized in that: The control processor (51) includes a receiving module and an execution module. The control processor (51) receives signals from the low liquid level sensor (52), the high liquid level sensor (53) liquid level detection unit and the liquid ammonia supply pipe (45) ammonia replenishment pipeline pressure monitoring unit through the receiving module, and controls the opening degree and opening and closing status of each electric control valve of the ammonia replenishment main valve pipe (41), ammonia replenishment secondary valve pipe (42), loop pipeline (48) and venting valve pipe (49) through the execution module.

8. The energy-saving ammonia replenishment structure for a synthetic ammonia cooler according to claim 6, characterized in that: The high liquid level sensor (53) and low liquid level sensor (52) are arranged from top to bottom.

Images