Method for monitoring the safety of liquid ammonia production

Abstract

The application provides a kind of liquid ammonia production safety monitoring method.The method includes obtaining the liquid ammonia safety state parameter of liquid ammonia storage tank;The liquid ammonia safety parameter is stored and is processed with preset safety parameter, and the liquid ammonia storage difference component is obtained;According to the liquid ammonia supervision signal sent by the liquid ammonia storage difference component to chemical production system, the production early warning state of the liquid ammonia early warning device on the liquid ammonia storage tank is adjusted.Through the collection of liquid ammonia safety state parameter, the current safety production situation of liquid ammonia storage tank is determined, and the liquid ammonia safety parameter is stored and processed with preset safety parameter, which is compared with the current safety production state and standard production state of liquid ammonia storage tank to determine the difference degree of production state, and finally according to the difference degree reflected by the liquid ammonia storage difference component, the accurate leakage warning of liquid ammonia storage tank production is facilitated, and the ammonia leakage warning accuracy is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of liquid ammonia production technology, and in particular to a method for safety monitoring in liquid ammonia production. Background Technology

[0002] Tank farms are a crucial component of chemical enterprises, storing large quantities of raw materials, intermediates, and finished products. For a highly efficient chemical production facility, a tank farm is indispensable. However, tank farms are also among the most dangerous areas, as most chemical raw materials are flammable, explosive, toxic, or stored under high pressure. Ammonia is an important chemical raw material; improper handling or damage to tanks and valves during the transportation, storage, and use of liquid ammonia can lead to leaks. This not only damages the surrounding environment but also increases the risk of poisoning, fires, and explosions.

[0003] Currently, the traditional method for handling leaks in liquid ammonia storage tanks is to use a spray system to spray the tank. However, this method is often ineffective in providing early warnings during the production process of liquid ammonia storage tanks, and it is impossible to provide timely and accurate warnings of leaks during the transfer of liquid ammonia. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a liquid ammonia production safety monitoring method that effectively improves the accuracy of early warning of ammonia leakage.

[0005] The objective of this invention is achieved through the following technical solution:

[0006] A method for safety monitoring in liquid ammonia production involves using a liquid ammonia production unit for liquid ammonia storage and production. The liquid ammonia production unit includes a liquid ammonia storage tank and a liquid ammonia early warning device. The liquid ammonia early warning device includes an ammonia content early warning instrument and a liquid ammonia level early warning gauge. The ammonia content early warning instrument is located outside the liquid ammonia storage tank and is positioned near the flange interface of the liquid ammonia storage tank. The ammonia content early warning instrument is used to detect the ammonia content leaking from the liquid ammonia storage tank. The liquid ammonia level early warning gauge is connected to the liquid ammonia storage tank and is used to detect the liquid ammonia level inside the liquid ammonia storage tank.

[0007] The method for safety monitoring of liquid ammonia production includes:

[0008] Obtain the liquid ammonia safety status parameters of the liquid ammonia storage tank;

[0009] The liquid ammonia safety parameters are compared with preset safety parameters to obtain the liquid ammonia storage and production difference.

[0010] Based on the liquid ammonia storage and production difference, the liquid ammonia monitoring signal sent to the chemical production system is used to adjust the production warning status of the liquid ammonia warning device on the liquid ammonia storage tank.

[0011] In one embodiment, the liquid ammonia safety status parameter includes the ammonia leakage detection content of the liquid ammonia storage tank.

[0012] In one embodiment, the step of processing the liquid ammonia safety parameters with preset safety parameters to obtain the liquid ammonia storage and production difference includes: calculating the content difference between the detected ammonia leakage content and the preset ammonia content to obtain the ammonia content difference.

[0013] In one embodiment, adjusting the production warning state of the liquid ammonia warning device on the liquid ammonia storage tank based on the liquid ammonia storage-production difference signal sent to the chemical production system includes: detecting whether the ammonia content difference is greater than a first preset difference; when the ammonia content difference is greater than the first preset difference, sending an ammonia leak warning signal to the chemical production system to activate the warning state of the ammonia content warning device.

[0014] In one embodiment, the step of detecting whether the ammonia content difference is greater than a first preset difference further includes: when the ammonia content difference is less than or equal to the first preset difference, sending an ammonia leak alarm signal to the chemical production system to turn off the warning state of the ammonia content warning instrument.

[0015] In one embodiment, when the ammonia content difference is greater than the first preset difference, an ammonia leak warning signal is sent to the chemical production system to activate the warning state of the ammonia content warning instrument. The method further includes: simultaneously activating the fire sprinkler according to the ammonia leak warning signal to spray the flange interface of the liquid ammonia storage tank.

[0016] In one embodiment, the liquid ammonia safety status parameter includes the liquid ammonia level in the liquid ammonia storage tank.

[0017] In one embodiment, the step of processing the liquid ammonia safety parameters with preset safety parameters to obtain the liquid ammonia storage-production difference component includes: calculating the liquid ammonia level difference between the liquid ammonia level and the preset liquid level to obtain the liquid ammonia level difference component.

[0018] In one embodiment, adjusting the production warning state of the liquid ammonia warning device on the liquid ammonia storage tank by sending a liquid ammonia monitoring signal to the chemical production system based on the liquid ammonia level difference includes: detecting whether the liquid ammonia level difference is greater than a second preset difference; when the liquid ammonia level difference is greater than the second preset difference, sending an ammonia high pressure warning signal to the chemical production system to activate the warning state of the liquid ammonia level warning device.

[0019] In one embodiment, when the liquid ammonia level difference component is greater than the second preset difference component, an ammonia high pressure early warning signal is sent to the chemical production system to activate the early warning state of the liquid ammonia level early warning meter. The method further includes: synchronously activating a cooling and pressure relief device according to the ammonia high pressure early warning signal to cool and depressurize the liquid ammonia storage tank.

[0020] Compared with the prior art, the present invention has at least the following advantages:

[0021] By collecting safety status parameters of liquid ammonia, it is easy to determine the current safe production status of liquid ammonia storage tanks. The liquid ammonia safety parameters are compared with preset safety parameters to determine the degree of difference in the production status of liquid ammonia storage tanks, i.e., the liquid ammonia storage-production difference component. Finally, based on the degree of difference reflected by the liquid ammonia storage-production difference component, it is easy to determine the leakage situation of liquid ammonia storage tanks during the safe transmission and production of liquid ammonia. This facilitates accurate leakage early warning of liquid ammonia storage tank production and effectively improves the accuracy of ammonia leakage early warning. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a flowchart of a method for safety monitoring of liquid ammonia production in one embodiment;

[0024] Figure 2 This is an internal structural diagram of a computer device in one embodiment. Detailed Implementation

[0025] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the invention are shown in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0026] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0028] This invention relates to a method for safety monitoring of liquid ammonia production. In one embodiment, the method includes acquiring liquid ammonia safety status parameters of a liquid ammonia storage tank; performing storage and production processing on the liquid ammonia safety parameters and preset safety parameters to obtain a liquid ammonia storage-production difference; and sending a liquid ammonia monitoring signal to the chemical production system based on the liquid ammonia storage-production difference to adjust the production warning status of the liquid ammonia warning device on the liquid ammonia storage tank. By collecting the liquid ammonia safety status parameters, the current safe production status of the liquid ammonia storage tank can be easily determined. The storage and production processing on the liquid ammonia safety parameters and preset safety parameters compares the current safe production status of the liquid ammonia storage tank with the standard production status to determine the degree of difference in the production status of the liquid ammonia storage tank, i.e., the liquid ammonia storage-production difference. Finally, based on the degree of difference reflected in the liquid ammonia storage-production difference, it is easy to determine the leakage situation of the liquid ammonia storage tank during the safe transmission and production process of liquid ammonia, thereby facilitating accurate leakage warning of liquid ammonia storage tank production and effectively improving the accuracy of ammonia leakage warning.

[0029] Please see Figure 1 This is a flowchart of a liquid ammonia production safety monitoring method according to an embodiment of the present invention. The liquid ammonia production safety monitoring method includes some or all of the following steps.

[0030] S100: Obtain the liquid ammonia safety status parameters of the liquid ammonia storage tank.

[0031] In this embodiment, the liquid ammonia safety status parameter refers to the liquid ammonia production status corresponding to the current production of the liquid ammonia storage tank. That is, the liquid ammonia safety status parameter is the real-time safe production status of the liquid ammonia storage tank, and also represents the internal and external safe production status of the liquid ammonia storage tank. By collecting the liquid ammonia safety status parameter, it is convenient to monitor the usage status of the liquid ammonia storage tank during the current liquid ammonia storage and transfer process. This facilitates sampling of the usage status of the liquid ammonia storage tank during liquid ammonia use and storage, and consequently, facilitates the judgment of the status of the liquid ammonia storage tank during liquid ammonia use and storage.

[0032] S200: The liquid ammonia safety parameters are compared with preset safety parameters to obtain the liquid ammonia storage and production difference.

[0033] In this embodiment, the liquid ammonia safety parameter refers to the liquid ammonia production state corresponding to the current production of the liquid ammonia storage tank. That is, the liquid ammonia safety status parameter refers to the real-time safe production state of the liquid ammonia storage tank, which is also the internal and external safe production state of the liquid ammonia storage tank. By collecting the liquid ammonia safety status parameter, it is convenient to monitor the usage status of the liquid ammonia storage tank during the current liquid ammonia storage and transfer process, thereby facilitating the sampling of the usage status of the liquid ammonia storage tank during liquid ammonia use and storage, and further facilitating the judgment of the state of the liquid ammonia storage tank during liquid ammonia use and storage. The preset safety parameter refers to the liquid ammonia safety parameter corresponding to the standard liquid ammonia production state of the liquid ammonia storage tank. That is, the preset safety parameter is the liquid ammonia safety parameter under normal use state of the liquid ammonia storage tank, which is also the liquid ammonia production state of the liquid ammonia storage tank under conditions where no liquid ammonia leakage has occurred. The storage and production process of liquid ammonia is performed by comparing the liquid ammonia safety parameters with the preset safety parameters. This comparison helps to determine the difference between the current liquid ammonia production status of the liquid ammonia storage tank and the standard liquid ammonia production status, thereby facilitating the determination of whether the liquid ammonia storage tank has experienced a liquid ammonia leak.

[0034] S300: Based on the liquid ammonia storage and production difference, the liquid ammonia monitoring signal sent to the chemical production system is used to adjust the production warning status of the liquid ammonia warning device on the liquid ammonia storage tank.

[0035] In this embodiment, the liquid ammonia storage-production difference is the difference between the liquid ammonia safety parameter and the preset safety parameter. The liquid ammonia safety parameter is the liquid ammonia production state corresponding to the current production of the liquid ammonia storage tank, that is, the liquid ammonia safety state parameter is the liquid ammonia state of the liquid ammonia storage tank during real-time safe production, which is also the internal and external safe production state of the liquid ammonia storage tank. By collecting the liquid ammonia safety state parameter, it is convenient to monitor the usage status of the liquid ammonia storage tank during the current liquid ammonia storage and transfer process, thereby facilitating the sampling of the usage status of the liquid ammonia storage tank during liquid ammonia use and storage, and further facilitating the judgment of the status of the liquid ammonia storage tank during liquid ammonia use and storage. The preset safety parameter is the liquid ammonia safety parameter corresponding to the liquid ammonia storage tank under the standard liquid ammonia production state, that is, the liquid ammonia safety parameter under the normal use state of the liquid ammonia storage tank, which is also the liquid ammonia production state of the liquid ammonia storage tank under the condition that no liquid ammonia leakage has occurred. The storage and production processing of liquid ammonia involves comparing the differences between the liquid ammonia safety parameters and the preset safety parameters. This comparison helps determine the difference between the current liquid ammonia production state of the storage tank and the standard liquid ammonia production state, thereby facilitating the determination of whether liquid ammonia leakage has occurred. Thus, after determining the difference in liquid ammonia production and storage, the difference between the current and standard liquid ammonia production states of the storage tank is identified, facilitating the determination of liquid ammonia leakage. The degree of difference reflected in the liquid ammonia production and storage difference allows for the sending of corresponding early warning signals to the chemical production system, enabling precise early warning of liquid ammonia leakage and effectively improving the accuracy of early warnings for liquid ammonia storage tanks.

[0036] In the above embodiments, by collecting the safety status parameters of liquid ammonia, it is convenient to determine the current safe production status of the liquid ammonia storage tank. The liquid ammonia safety parameters are compared with the preset safety parameters to compare the current safe production status of the liquid ammonia storage tank with the standard production status, so as to determine the degree of difference in the production status of the liquid ammonia storage tank, that is, the liquid ammonia storage-production difference component. Finally, based on the degree of difference reflected by the liquid ammonia storage-production difference component, it is convenient to determine the leakage situation of the liquid ammonia storage tank during the safe transmission and production of liquid ammonia, thereby facilitating accurate leakage early warning of liquid ammonia storage tank production and effectively improving the accuracy of ammonia leakage early warning.

[0037] In one embodiment, the liquid ammonia safety status parameter includes the ammonia leakage detection content of the liquid ammonia storage tank. In this embodiment, the liquid ammonia safety status parameter is the liquid ammonia production status corresponding to the current production of the liquid ammonia storage tank, that is, the liquid ammonia safety status parameter is the liquid ammonia status of the liquid ammonia storage tank during real-time safe production, and also the internal and external safe production status of the liquid ammonia storage tank. By collecting the liquid ammonia safety status parameter, it is convenient to monitor the usage status of the liquid ammonia storage tank during the current liquid ammonia storage and transfer process, thereby facilitating the sampling of the usage status of the liquid ammonia storage tank during liquid ammonia use and storage, and further facilitating the judgment of the status of the liquid ammonia storage tank during liquid ammonia use and storage. Specifically, the liquid ammonia safety status parameter is the ammonia leakage detection content of the liquid ammonia storage tank. The ammonia leakage detection content is the amount of liquid ammonia leaked from the liquid ammonia storage tank, that is, the ammonia leakage detection content is the amount of liquid ammonia leaked from the liquid ammonia storage tank at the flange interface. By detecting the ammonia content at the location where the liquid ammonia leak occurs in the liquid ammonia storage tank, it is easy to determine the degree of danger of the liquid ammonia leakage in the liquid ammonia storage tank. For example, the ammonia content early warning instrument is used to measure and collect the ammonia leakage detection content of the liquid ammonia storage tank.

[0038] Further, the step of processing the liquid ammonia safety parameters with preset safety parameters to obtain the liquid ammonia storage-production difference component includes: calculating the content difference between the detected ammonia leakage content and the preset ammonia content to obtain the ammonia content difference component. In this embodiment, the liquid ammonia safety parameter is the detected ammonia leakage content, and the liquid ammonia safety status parameter is the liquid ammonia production status corresponding to the current production of the liquid ammonia storage tank. That is, the liquid ammonia safety status parameter is the liquid ammonia status of the liquid ammonia storage tank during real-time safe production, which is also the internal and external safe production status of the liquid ammonia storage tank. By collecting the liquid ammonia safety status parameter, it is convenient to monitor the usage status of the liquid ammonia storage tank during the current liquid ammonia storage and transmission process, thereby facilitating the sampling of the usage status of the liquid ammonia storage tank during liquid ammonia use and storage, and further facilitating the judgment of the status of the liquid ammonia storage tank during liquid ammonia use and storage. Specifically, the liquid ammonia safety status parameter is the ammonia leakage detection content of the liquid ammonia storage tank. The ammonia leakage detection content is the amount of liquid ammonia leaking from the liquid ammonia storage tank, specifically the amount of liquid ammonia leaking at the flange interface. By detecting the ammonia content at the location of the liquid ammonia leak, the degree of danger of the liquid ammonia leak in the liquid ammonia storage tank can be easily determined. For example, the ammonia content early warning instrument is used to measure and collect the ammonia leakage detection content of the liquid ammonia storage tank. The preset ammonia content is the standard ammonia leakage detection content. Calculating the difference between the ammonia leakage detection content and the preset ammonia content determines the degree of difference between the ammonia leakage detection content and the preset ammonia content, i.e., the degree of difference between the ammonia leakage detection content and the standard leakage detection content. This facilitates determining the degree of liquid ammonia leakage at the flange interface of the liquid ammonia storage tank, thereby facilitating the determination of the degree of danger of the liquid ammonia leak in the liquid ammonia storage tank.

[0039] Furthermore, the step of adjusting the production warning state of the liquid ammonia warning device on the liquid ammonia storage tank based on the liquid ammonia storage-production difference signal sent to the chemical production system includes: detecting whether the ammonia content difference is greater than a first preset difference; when the ammonia content difference is greater than the first preset difference, sending an ammonia leak warning signal to the chemical production system to activate the warning state of the ammonia content warning device. In this embodiment, the ammonia content difference is the difference between the ammonia leak detection content and the preset ammonia content, the liquid ammonia safety parameter is the ammonia leak detection content, and the liquid ammonia safety status parameter is the liquid ammonia production status corresponding to the current production of the liquid ammonia storage tank. That is, the liquid ammonia safety status parameter is the liquid ammonia status of the liquid ammonia storage tank during real-time safe production, and also the internal and external safe production status of the liquid ammonia storage tank. By collecting the safety status parameters of the liquid ammonia, it is convenient to monitor the usage status of the liquid ammonia storage tank during the current liquid ammonia storage and transfer process. This facilitates sampling of the usage status of the liquid ammonia storage tank during liquid ammonia use and storage, and further facilitates the judgment of the status of the liquid ammonia storage tank during liquid ammonia use and storage. Specifically, the safety status parameter of the liquid ammonia is the ammonia leakage detection content of the liquid ammonia storage tank, which is the amount of liquid ammonia leaked from the liquid ammonia storage tank, that is, the amount of liquid ammonia leaked from the liquid ammonia storage tank at the flange interface. By detecting the ammonia content at the location where the liquid ammonia leak occurs, it is convenient to determine the degree of danger of the liquid ammonia leakage. For example, the ammonia content early warning instrument is used to measure and collect the ammonia leakage detection content of the liquid ammonia storage tank. The preset ammonia content is the standard ammonia leak detection content. Calculating the difference between the ammonia leak detection content and the preset ammonia content determines the degree of difference between the two, i.e., the degree of difference between the ammonia leak detection content and the standard leak detection content. This facilitates determining the extent of ammonia leakage at the flange interface of the liquid ammonia storage tank, thereby facilitating the determination of the ammonia leakage hazard level of the liquid ammonia storage tank. The first preset difference is the standard ammonia content difference of the liquid ammonia storage tank, i.e., the first preset difference is the critical ammonia content difference corresponding to the liquid ammonia leakage in the liquid ammonia storage tank. Specifically, the first preset difference is the warning value for the liquid ammonia storage tank when a liquid ammonia leak occurs. Thus, if the ammonia content difference is greater than the first preset difference, it indicates that the ammonia leakage detection content of the liquid ammonia storage tank is greater than the preset ammonia content, which means that the ammonia leakage detection content of the liquid ammonia storage tank is too high, and that a safety accident is about to occur due to the ammonia leakage of the liquid ammonia storage tank. At this time, an ammonia leakage warning signal is sent to the chemical production system to activate the warning state of the ammonia content warning instrument, so as to accurately warn of the liquid ammonia leakage at the flange interface of the liquid ammonia storage tank, thereby facilitating the timely triggering of the warning function of the ammonia content warning instrument.

[0040] Furthermore, the step of detecting whether the ammonia content difference is greater than a first preset difference further includes: when the ammonia content difference is less than or equal to the first preset difference, sending an ammonia leak stop alarm signal to the chemical production system to disable the warning state of the ammonia content warning instrument. In this embodiment, the first preset difference is the standard ammonia content difference of the liquid ammonia storage tank, that is, the first preset difference is the critical ammonia content difference corresponding to the liquid ammonia storage tank when a liquid ammonia leak occurs. Specifically, the first preset difference is the warning value of the liquid ammonia storage tank when a liquid ammonia leak occurs. Thus, when the ammonia content difference is less than or equal to the first preset difference, it indicates that the ammonia leak detection content of the liquid ammonia storage tank is less than or equal to the preset ammonia content, that is, it indicates that there is no ammonia leak in the liquid ammonia storage tank, and that is, it indicates that the liquid ammonia storage tank is in a safe production state. At this time, sending an ammonia leak stop alarm signal to the chemical production system to disable the warning state of the ammonia content warning instrument prevents the warning function of the ammonia content warning instrument from being falsely triggered.

[0041] In another embodiment, when the ammonia content difference exceeds the first preset difference, an ammonia leak warning signal is sent to the chemical production system to activate the warning state of the ammonia content warning instrument. This further includes: simultaneously activating fire sprinklers based on the ammonia leak warning signal to spray the flange interface of the liquid ammonia storage tank. In this embodiment, the ammonia content difference exceeding the first preset difference indicates that the detected ammonia leak content in the liquid ammonia storage tank is greater than the preset ammonia content, meaning the detected ammonia leak content is too high, indicating an impending safety accident. Sending an ammonia leak warning signal to the chemical production system at this time activates the warning state of the ammonia content warning instrument, facilitating accurate warning of ammonia leaks at the flange interface of the liquid ammonia storage tank, and enabling the ammonia content warning instrument to trigger its warning function promptly. Subsequently, based on the analysis of the ammonia leak warning signal, the leakage of liquid ammonia at the flange interface of the liquid ammonia storage tank was determined. In order to avoid excessive leakage of liquid ammonia, the fire sprinkler was activated at the same time as the ammonia content warning instrument issued the warning. This facilitated the fire sprinkler to adsorb and treat the leaked liquid ammonia, and to absorb the leaked liquid ammonia for centralized recovery and treatment.

[0042] In one embodiment, the liquid ammonia safety status parameter includes the liquid ammonia level in the liquid ammonia storage tank. In this embodiment, the liquid ammonia safety status parameter is the liquid ammonia production status corresponding to the current production of the liquid ammonia storage tank, that is, the liquid ammonia safety status parameter is the real-time safe production status of the liquid ammonia storage tank, and also the internal and external safe production status of the liquid ammonia storage tank. By collecting the liquid ammonia safety status parameter, it is convenient to monitor the usage status of the liquid ammonia storage tank during the current liquid ammonia storage and transfer process, thereby facilitating the sampling of the usage status of the liquid ammonia storage tank during liquid ammonia use and storage, and further facilitating the judgment of the status of the liquid ammonia storage tank during liquid ammonia use and storage. Specifically, the liquid ammonia safety status parameter is the liquid ammonia level in the liquid ammonia storage tank. The liquid ammonia level is the height of the liquid ammonia solution in the liquid ammonia storage tank, that is, the liquid ammonia level is the amount of liquid ammonia stored in the liquid ammonia storage tank. By detecting when the liquid ammonia level in the liquid ammonia storage tank exceeds the water level, it is easy to determine the degree of excessive storage of liquid ammonia in the liquid ammonia storage tank. For example, the liquid ammonia level early warning meter is used to measure and collect the liquid ammonia level in the liquid ammonia storage tank.

[0043] Further, the step of processing the liquid ammonia safety parameters with preset safety parameters to obtain the liquid ammonia storage-production difference component includes: calculating the level difference between the liquid ammonia level and the preset level to obtain the liquid ammonia level difference component. In this embodiment, the liquid ammonia safety status parameter is the liquid ammonia production status corresponding to the current production of the liquid ammonia storage tank, that is, the liquid ammonia safety status parameter is the liquid ammonia status of the liquid ammonia storage tank during real-time safe production, and also the internal and external safe production status of the liquid ammonia storage tank. By collecting the liquid ammonia safety status parameter, it is convenient to monitor the usage status of the liquid ammonia storage tank during the current liquid ammonia storage and transmission process, thereby facilitating the sampling of the usage status of the liquid ammonia storage tank during the use and storage of liquid ammonia, and further facilitating the judgment of the status of the liquid ammonia storage tank during the use and storage of liquid ammonia. Specifically, the liquid ammonia safety status parameter is the liquid ammonia level in the liquid ammonia storage tank. The liquid ammonia level is the height of the liquid ammonia solution in the tank, meaning it represents the amount of liquid ammonia stored. By detecting instances of excessive liquid ammonia levels in the tank, the degree of over-storage of liquid ammonia can be determined. The preset level is the standard liquid ammonia level in the tank, representing the highest possible liquid ammonia level and corresponding to the maximum liquid ammonia storage capacity. By calculating the difference between the liquid ammonia level and the preset level, it is easy to determine whether the liquid ammonia level exceeds the standard level, thus facilitating the assessment of the degree of difference between the liquid ammonia level and the standard level.

[0044] Furthermore, the step of adjusting the production warning status of the liquid ammonia warning device on the liquid ammonia storage tank by sending a liquid ammonia monitoring signal to the chemical production system based on the liquid ammonia level difference component includes: detecting whether the liquid ammonia level difference component is greater than a second preset difference component; when the liquid ammonia level difference component is greater than the second preset difference component, sending an ammonia high-pressure warning signal to the chemical production system to activate the warning status of the liquid ammonia level warning device. In this embodiment, the liquid ammonia level difference component is the difference between the liquid ammonia level and the preset level, and the liquid ammonia level is the height of the liquid ammonia solution in the liquid ammonia storage tank, that is, the liquid ammonia level is the amount of liquid ammonia stored in the liquid ammonia storage tank. By detecting the liquid ammonia level exceeding the water level in the liquid ammonia storage tank, it is easy to determine the degree of excessive storage of liquid ammonia in the liquid ammonia storage tank. The preset level is the standard liquid ammonia level of the liquid ammonia storage tank, that is, the preset level is the highest liquid ammonia level in the liquid ammonia storage tank, which corresponds to the maximum amount of liquid ammonia stored in the liquid ammonia storage tank. By calculating the difference between the liquid ammonia level and the preset level, it is easy to determine whether the liquid ammonia level in the liquid ammonia storage tank exceeds the standard level, thereby facilitating the determination of the degree of difference between the liquid ammonia level in the liquid ammonia storage tank and the standard level. The second preset difference component is the standard liquid ammonia level difference component of the liquid ammonia storage tank, that is, the second preset difference component is the critical liquid ammonia level difference component corresponding to the liquid ammonia storage tank when the liquid ammonia level is too high. Specifically, the second preset difference component is the warning value when the liquid ammonia storage tank stores too much liquid ammonia. If the liquid ammonia level difference component is greater than the second preset difference component, it indicates that the liquid ammonia level in the liquid ammonia storage tank is too high, that is, it indicates that the liquid ammonia in the liquid ammonia storage tank is under overpressure. At this time, an ammonia high pressure warning signal is sent to the chemical production system to activate the warning state of the liquid ammonia level warning meter, which facilitates the activation of the liquid ammonia level warning function of the liquid ammonia level warning meter, thereby facilitating accurate warning of excessive liquid ammonia levels in the liquid ammonia storage tank.

[0045] In another embodiment, when the liquid ammonia level difference component is greater than the second preset difference component, an ammonia high-pressure early warning signal is sent to the chemical production system to activate the early warning state of the liquid ammonia level early warning meter. This further includes: simultaneously activating a cooling and pressure relief device based on the ammonia high-pressure early warning signal to cool and depressurize the liquid ammonia storage tank. In this embodiment, the liquid ammonia level difference component being greater than the second preset difference component indicates that the liquid ammonia level in the liquid ammonia storage tank is too high, meaning there is an excessive amount of liquid ammonia stored in the tank. Sending an ammonia high-pressure early warning signal to the chemical production system at this time activates the early warning state of the liquid ammonia level early warning meter, facilitating the activation of the liquid ammonia level early warning function and enabling accurate early warning of excessive liquid ammonia levels in the storage tank. Subsequently, based on the analysis of the ammonia high-pressure warning signal, it was determined that the liquid ammonia in the liquid ammonia storage tank was under high pressure. To prevent overpressure, the cooling and pressure relief device was activated simultaneously with the liquid ammonia level warning device. This activated both the cooling and pressure relief functions of the device, allowing for timely closure of the liquid ammonia inlet and outlet of the storage tank and preventing further pressurization. In another embodiment, the ammonia content warning instrument replaces the cooling and pressure relief device for cooling under high pressure, while the device acts as a safety valve to relieve pressure on the liquid ammonia storage tank. Simultaneously, the ammonia released from the tank through the safety valve is directed to an emergency pool to absorb any excess ammonia.

[0046] Understandably, the liquid ammonia storage tank is a highly airtight tank. Tanks made of this material are generally highly dense and opaque, effectively improving the maintenance of the storage environment for liquid ammonia. Obtaining the liquid ammonia level involves collecting the liquid level height within the storage tank, typically requiring the insertion of a level needle into the tank for accurate monitoring. However, the level needle, located inside the tank, is susceptible to corrosion from the liquid ammonia and requires periodic replacement. This replacement process can easily introduce external substances, contaminating the liquid ammonia and affecting its quality.

[0047] To facilitate the detection of the liquid ammonia level in the liquid ammonia storage tank, the acquisition of the liquid ammonia safety status parameters of the liquid ammonia storage tank, specifically, the acquisition of the liquid ammonia level in the liquid ammonia storage tank, includes the following steps:

[0048] Obtain the gaseous ammonia pressure and liquid ammonia pressure of the liquid ammonia storage tank;

[0049] The pressure of gaseous ammonia and the pressure of liquid ammonia are subjected to pressure storage treatment to obtain the ammonia pressure difference value;

[0050] The ammonia pressure difference value is subjected to pressure-level conversion processing to obtain the liquid ammonia level.

[0051] In this embodiment, the gaseous ammonia pressure refers to the pressure of gaseous ammonia within the liquid ammonia storage tank, and the liquid ammonia pressure refers to the pressure of liquid ammonia within the liquid ammonia storage tank. Specifically, the gaseous ammonia pressure corresponds to the pressure exerted by the gaseous ammonia within the liquid ammonia storage tank on the upper surface of the liquid ammonia storage tank, and the liquid ammonia pressure corresponds to the pressure exerted by the liquid ammonia within the liquid ammonia storage tank on the lower surface of the liquid ammonia storage tank. By collecting the gaseous ammonia pressure and the liquid ammonia pressure of the liquid ammonia storage tank, it is convenient to collect the pressure of ammonia gas and liquid ammonia within the liquid ammonia storage tank, thereby facilitating the determination of the pressure ratio of ammonia gas and liquid ammonia within the liquid ammonia storage tank. The pressure storage processing of the gaseous ammonia pressure and the liquid ammonia pressure involves comparing the differences between the gaseous ammonia pressure and the liquid ammonia pressure. This facilitates the determination of the pressure difference between the gaseous and liquid ammonia in the liquid ammonia storage tank, thereby facilitating the determination of the volume occupied by the gaseous and liquid ammonia in the liquid ammonia storage tank, and further facilitating the determination of the degree of volume difference between the gaseous and liquid ammonia in the liquid ammonia storage tank, i.e., the ammonia pressure difference value. The pressure-level conversion processing of the ammonia pressure difference value converts the ammonia pressure difference value into the corresponding liquid level. That is, under atmospheric pressure, the pressure difference between the gaseous and liquid ammonia in the liquid ammonia storage tank corresponds to the liquid level, facilitating the determination of the liquid ammonia level in the liquid ammonia storage tank. This makes it easier to obtain the liquid ammonia level without the need to add a level gauge to the liquid ammonia storage tank for level acquisition; only the pressure of the upper and lower surfaces of the liquid ammonia storage tank needs to be collected.

[0052] In another embodiment, the liquid ammonia level early warning gauge detects the liquid ammonia level in the liquid ammonia storage tank. Specifically, the liquid ammonia level early warning gauge calculates the liquid ammonia level by the difference between the upper gaseous ammonia pressure and the lower liquid ammonia pressure in the liquid ammonia storage tank. The safe range of this difference is 5% to 70%.

[0053] Further, the step of detecting whether the liquid ammonia level difference component is greater than the second preset difference component also includes the following steps:

[0054] When the liquid ammonia level difference component is less than or equal to the second preset difference component, it is detected whether the ammonia pressure difference value is less than the preset pressure difference;

[0055] When the ammonia pressure difference is less than the preset pressure difference, the liquid ammonia outlet flow rate of the liquid ammonia storage tank is obtained;

[0056] Detect whether the liquid ammonia outlet flow rate is less than the preset flow rate;

[0057] When the liquid ammonia outlet flow rate is less than the preset flow rate, a low liquid ammonia leakage warning signal is sent to the chemical production system to activate the inlet and outlet shut-off valve of the liquid ammonia storage tank.

[0058] In this embodiment, if the liquid ammonia level difference component is less than or equal to the second preset difference component, it indicates that the liquid ammonia level in the liquid ammonia storage tank is too low, meaning the amount of liquid ammonia stored in the tank is too small. It is necessary to determine the pressure difference between the ammonia gas and liquid ammonia in the tank, i.e., to detect whether the ammonia pressure difference value is less than the preset pressure difference. This is a low-pressure detection of the pressure difference between the ammonia gas and liquid ammonia in the tank. If the ammonia pressure difference value is less than the preset pressure difference, it indicates that the pressure difference between the ammonia gas and liquid ammonia in the tank is small, meaning the amount of liquid ammonia in the tank is low. This can be addressed by collecting the liquid ammonia outlet flow rate of the tank. Specifically, a liquid ammonia flow meter is installed at the liquid ammonia outlet of the tank to sample the liquid ammonia outlet flow rate. The fact that the liquid ammonia outlet flow rate is less than the preset flow rate indicates that the total amount of liquid ammonia flowing out of the liquid ammonia storage tank is less than the standard flow rate. This means the rate of liquid ammonia flowing out of the liquid ammonia storage tank is less than the normal flow rate, indicating that liquid ammonia leakage has occurred at other locations besides the outlet. This effectively distinguishes low-pressure differential situations in the liquid ammonia storage tank during normal use and significantly improves the accuracy of leak detection under low-pressure differential conditions. Furthermore, based on the low-leakage warning signal, the inlet and outlet shut-off valves are controlled to close simultaneously, further reducing leakage. In another embodiment, when the inlet and outlet shut-off valves are closed, the fire sprinkler system is also controlled to spray and absorb the leaked ammonia. All valves mentioned above are solenoid valves and can be remotely controlled via wired or wireless means.

[0059] In another embodiment, a flow meter is also installed at the liquid ammonia reflux port of the liquid ammonia storage tank to collect the liquid ammonia reflux flow rate. When the liquid ammonia outlet flow rate is equal to the liquid ammonia reflux flow rate, the flow rate of the liquid ammonia level drop is detected to be greater than a preset rate. When the flow rate of the liquid ammonia level drop is greater than the preset rate, a low-pressure over-leakage warning signal is sent to the chemical production system to facilitate timely shutdown and emergency repairs.

[0060] All the above-mentioned preset variables are set in the database for easy retrieval, and different preset variables are placed in different storage units, that is, in different storage stacks.

[0061] In one embodiment, this application also provides a liquid ammonia production apparatus, which is implemented using the liquid ammonia production safety monitoring method described in any of the above embodiments. In one embodiment, the liquid ammonia production apparatus has functional modules for implementing the steps corresponding to the liquid ammonia production safety monitoring method. The liquid ammonia production apparatus includes a liquid ammonia storage tank and a liquid ammonia early warning device; the liquid ammonia early warning device includes an ammonia content early warning instrument and a liquid ammonia level early warning meter. The ammonia content early warning instrument is located outside the liquid ammonia storage tank and is positioned near the flange interface of the liquid ammonia storage tank. The ammonia content early warning instrument is used to detect the ammonia content leaked from the liquid ammonia storage tank. The liquid ammonia level early warning meter is connected to the liquid ammonia storage tank and is used to detect the liquid ammonia level inside the liquid ammonia storage tank.

[0062] In this embodiment, the liquid ammonia early warning device collects liquid ammonia safety status parameters to facilitate the determination of the current safe production status of the liquid ammonia storage tank. The liquid ammonia safety parameters are compared with preset safety parameters to compare the current safe production status of the liquid ammonia storage tank with the standard production status, thereby determining the degree of difference in the production status of the liquid ammonia storage tank, i.e., the liquid ammonia storage-production difference component. Finally, based on the degree of difference reflected by the liquid ammonia storage-production difference component, it is easy to determine the leakage situation of the liquid ammonia storage tank during the safe transmission and production process of liquid ammonia. This facilitates the liquid ammonia early warning device to provide accurate leakage warnings for the production of liquid ammonia storage tanks, effectively improving the accuracy of ammonia leakage warnings.

[0063] Each module in the aforementioned liquid ammonia production unit can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device, or stored as software in the computer device's memory, so that the processor can call and execute the corresponding operations of each module.

[0064] In one embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as follows: Figure 2 As shown, the computer device includes a processor, memory, and a network interface connected via a system bus. The processor provides computing and control capabilities. The memory includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores the operating system, computer programs, and a database. The internal memory provides the environment for the operation of the operating system and computer programs stored in the non-volatile storage medium. The database stores data such as auscultation operating status parameters, auscultation-touch-melt difference, and auscultation switching signals. The network interface is used for communication with external terminals via a network connection. When executed by the processor, the computer program implements a multilayer circuit board thermal pressure monitoring method.

[0065] Those skilled in the art will understand that Figure 2 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0066] In one embodiment, this application also provides a computer device including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps in the above-described method embodiments.

[0067] In one embodiment, this application also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps in the above-described method embodiments.

[0068] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the methods described above. Any references to memory, storage, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, or optical storage, etc. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc.

[0069] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A method for safety monitoring in liquid ammonia production, characterized in that, Liquid ammonia is produced and stored using a liquid ammonia production unit, which includes: Liquid ammonia storage tank, A liquid ammonia warning device includes an ammonia content warning instrument and a liquid ammonia level warning gauge. The ammonia content warning instrument is located outside the liquid ammonia storage tank and is positioned near the flange interface of the liquid ammonia storage tank. The ammonia content warning instrument is used to detect the ammonia content leaking from the liquid ammonia storage tank. The liquid ammonia level warning gauge is connected to the liquid ammonia storage tank and is used to detect the liquid ammonia level inside the liquid ammonia storage tank. The method for safety monitoring of liquid ammonia production includes: Obtaining the liquid ammonia safety status parameters of the liquid ammonia storage tank, wherein the liquid ammonia safety status parameters include the liquid ammonia level in the liquid ammonia storage tank; obtaining the liquid ammonia safety status parameters of the liquid ammonia storage tank includes the following steps: Obtain the gaseous ammonia pressure and liquid ammonia pressure of the liquid ammonia storage tank; The pressure of gaseous ammonia and the pressure of liquid ammonia are subjected to pressure storage treatment to obtain the ammonia pressure difference value; The ammonia pressure difference value is subjected to pressure-level conversion processing to obtain the liquid ammonia level; The liquid ammonia safety status parameters are compared with preset safety status parameters to obtain the liquid ammonia storage and production difference. Based on the difference between the liquid ammonia storage and production, a liquid ammonia monitoring signal is sent to the chemical production system to adjust the production warning status of the liquid ammonia warning device on the liquid ammonia storage tank. The step of processing the liquid ammonia safety status parameters with preset safety status parameters to obtain the liquid ammonia storage-production difference component includes: calculating the liquid ammonia level difference between the liquid ammonia level and the preset liquid level to obtain the liquid ammonia level difference component. The step of sending a liquid ammonia monitoring signal to the chemical production system based on the liquid ammonia storage-production difference to adjust the production warning status of the liquid ammonia warning device on the liquid ammonia storage tank includes: detecting whether the liquid ammonia level difference is greater than a second preset difference; when the liquid ammonia level difference is greater than the second preset difference, sending an ammonia high pressure warning signal to the chemical production system to activate the warning status of the liquid ammonia level warning device. Furthermore, when the liquid ammonia level difference component is less than or equal to the second preset difference component, the ammonia pressure difference value is detected as being less than the preset pressure difference; when the ammonia pressure difference value is less than the preset pressure difference, the liquid ammonia outlet flow rate of the liquid ammonia storage tank is obtained; the liquid ammonia outlet flow rate is detected as being less than the preset flow rate; when the liquid ammonia outlet flow rate is less than the preset flow rate, a liquid ammonia low leakage early warning signal is sent to the chemical production system to activate the inlet and outlet shut-off valve of the liquid ammonia storage tank.

2. The method for safety monitoring of liquid ammonia production according to claim 1, characterized in that, The liquid ammonia safety status parameters include the ammonia leakage detection content of the liquid ammonia storage tank.

3. The method for safety monitoring of liquid ammonia production according to claim 2, characterized in that, The step of performing storage and production processing on the liquid ammonia safety status parameters and preset safety status parameters to obtain the liquid ammonia storage and production difference includes: The difference between the detected ammonia leakage content and the preset ammonia content is calculated to obtain the ammonia content difference component.

4. The method for safety monitoring of liquid ammonia production according to claim 3, characterized in that, The step of sending a liquid ammonia monitoring signal to the chemical production system based on the difference between liquid ammonia storage and production, in order to adjust the production warning status of the liquid ammonia warning device on the liquid ammonia storage tank, includes: Detect whether the ammonia content difference component is greater than a first preset difference component; When the ammonia content difference exceeds the first preset difference, an ammonia leak warning signal is sent to the chemical production system to activate the warning state of the ammonia content warning instrument.

5. The method for safety monitoring of liquid ammonia production according to claim 4, characterized in that, The step of detecting whether the ammonia content difference is greater than a first preset difference component further includes: When the ammonia content difference is less than or equal to the first preset difference, an ammonia leak alarm signal is sent to the chemical production system to shut down the warning status of the ammonia content warning instrument.

6. The method for safety monitoring of liquid ammonia production according to claim 4, characterized in that, When the ammonia content difference exceeds the first preset difference, an ammonia leak warning signal is sent to the chemical production system to activate the warning state of the ammonia content warning instrument. The process further includes: The fire sprinkler system is activated synchronously based on the ammonia leak warning signal to spray water onto the flange interface of the liquid ammonia storage tank.

7. The method for safety monitoring of liquid ammonia production according to claim 1, characterized in that, When the liquid ammonia level difference component is greater than the second preset difference component, an ammonia high-pressure early warning signal is sent to the chemical production system to activate the early warning state of the liquid ammonia level early warning meter, and then the process further includes: The cooling and pressure relief device is activated synchronously according to the ammonia high pressure warning signal to cool and relieve pressure in the liquid ammonia storage tank.

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