CN114893724A - Liquid ammonia leakage monitoring method, monitoring device and monitoring test system - Google Patents
Liquid ammonia leakage monitoring method, monitoring device and monitoring test system Download PDFInfo
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- CN114893724A CN114893724A CN202210830835.4A CN202210830835A CN114893724A CN 114893724 A CN114893724 A CN 114893724A CN 202210830835 A CN202210830835 A CN 202210830835A CN 114893724 A CN114893724 A CN 114893724A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C13/00—Details of vessels or of the filling or discharging of vessels
- F17C13/12—Arrangements or mounting of devices for preventing or minimising the effect of explosion ; Other safety measures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2876—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for valves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
- G01M3/3236—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers
- G01M3/3245—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers using a level monitoring device
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
- G01M3/3236—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers
- G01M3/3272—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers for verifying the internal pressure of closed containers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2221/00—Handled fluid, in particular type of fluid
- F17C2221/01—Pure fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2223/00—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel
- F17C2223/01—Handled fluid before transfer, i.e. state of fluid when stored in the vessel or before transfer from the vessel characterised by the phase
- F17C2223/0146—Two-phase
- F17C2223/0153—Liquefied gas, e.g. LPG, GPL
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
- F17C2250/03—Control means
- F17C2250/036—Control means using alarms
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
- F17C2250/04—Indicating or measuring of parameters as input values
- F17C2250/0404—Parameters indicated or measured
- F17C2250/0408—Level of content in the vessel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
- F17C2250/04—Indicating or measuring of parameters as input values
- F17C2250/0404—Parameters indicated or measured
- F17C2250/043—Pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
- F17C2250/04—Indicating or measuring of parameters as input values
- F17C2250/0404—Parameters indicated or measured
- F17C2250/0447—Composition; Humidity
- F17C2250/0452—Concentration of a product
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2260/00—Purposes of gas storage and gas handling
- F17C2260/03—Dealing with losses
- F17C2260/035—Dealing with losses of fluid
- F17C2260/037—Handling leaked fluid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2260/00—Purposes of gas storage and gas handling
- F17C2260/03—Dealing with losses
- F17C2260/035—Dealing with losses of fluid
- F17C2260/038—Detecting leaked fluid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2260/00—Purposes of gas storage and gas handling
- F17C2260/04—Reducing risks and environmental impact
- F17C2260/042—Reducing risk of explosion
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/40—Engine management systems
Abstract
The invention discloses a liquid ammonia leakage monitoring method, a monitoring device and a monitoring test system, which comprises the steps of collecting state data of a liquid ammonia storage tank and liquid ammonia state data through a monitoring module of a liquid ammonia storage device, and dividing the liquid ammonia storage tank into a liquid phase area and a gas phase area according to the liquid level height of liquid ammonia; collecting the environmental ammonia concentration through an ammonia concentration monitoring device in a liquid ammonia leakage monitoring device, generating and spraying water mist by a water mist module if the environmental ammonia concentration is greater than a set ammonia concentration safety concentration threshold value, and covering the liquid ammonia tank through the water mist; judging whether leakage occurs at the valve or not according to the concentration of liquid ammonia at the valve, which is acquired by the valve leakage monitoring device, if not, judging whether leakage occurs at the tank body of the liquid ammonia tank or not, judging whether leakage occurs at the liquid phase region according to the liquid level height change value and the height change rate of the liquid ammonia, and sending related information and alarm information to a management module; and completing liquid ammonia leakage monitoring.
Description
Technical Field
The invention relates to the field of safety production, in particular to a liquid ammonia leakage monitoring method, a monitoring device and a monitoring and testing system.
Background
Liquid ammonia is colorless gas with pungent odor, is inflammable and easily soluble in water, and can greatly affect human bodies and surrounding facilities once leakage accidents occur, so that light people can cause personal injury and equipment damage, and heavy people can cause personal casualties and production stop accidents, and the consequences are beyond the conception.
Therefore, how to timely monitor the leakage of the liquid ammonia, quickly locate the ammonia leakage area of the liquid ammonia storage tank, and reduce the time for handling the accident is a subject to be researched by researchers in the current industry.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a liquid ammonia leakage monitoring method, which comprises the following steps:
acquiring state data of a liquid ammonia storage tank and liquid ammonia state data through a monitoring module of a liquid ammonia storage device, wherein the state data of the liquid ammonia storage tank comprises the liquid ammonia liquid level height in the liquid ammonia storage tank, and dividing the liquid ammonia tank into a liquid phase region and a gas phase region according to the liquid ammonia liquid level height; the liquid ammonia state data comprise liquid ammonia liquid level height;
acquiring the environmental ammonia concentration through an ammonia concentration monitoring device in the liquid ammonia leakage monitoring device, generating and spraying water mist by a water mist module if the environmental ammonia concentration is greater than a set ammonia concentration safety concentration threshold value, covering the liquid ammonia tank through the water mist, and simultaneously sending an alarm by an alarm device;
step three, judging whether leakage occurs at the valve or not according to the concentration of liquid ammonia at the valve, which is acquired by the valve leakage monitoring device, if not, determining that leakage occurs at the tank body of the liquid ammonia tank, entering step four, and if so, sending the information of the valve with the leakage to a management module;
step four, obtaining a liquid ammonia liquid level height change value and a liquid ammonia liquid level height change rate according to the liquid ammonia liquid level height collected by the liquid ammonia liquid level data collection device in the accident period, judging whether liquid phase area liquid ammonia leakage exists or not according to the liquid ammonia liquid level height change value and the liquid ammonia liquid level height change rate, if yes, sending liquid phase area height information and alarm information to the management module, otherwise, sending gas phase area height information and alarm information to the management module; and completing liquid ammonia leakage monitoring.
Further, the accident time interval is as follows: the ammonia concentration monitoring device collects a previous set time length of the moment when the environmental ammonia concentration is greater than the set ammonia concentration safety concentration threshold value.
Further, according to the liquid ammonia liquid level height data that accident period liquid ammonia liquid level data acquisition device gathered, obtain liquid ammonia liquid level height change value and height change rate, include: and obtaining a liquid ammonia liquid level height change value according to the liquid ammonia liquid level height data in the accident time period, wherein the ratio of the liquid ammonia liquid level height change value to the accident time period is a height change rate.
Further, the determining whether liquid ammonia leakage in the liquid phase region is caused according to the liquid ammonia level height variation value and the height variation rate includes:
if the liquid level height change value of the liquid ammonia is larger than the set height change threshold value and the height change rate is larger than the set height change rate threshold value, liquid ammonia leakage in the liquid phase region is determined;
if the liquid level height change value of the liquid ammonia is greater than the set height change threshold value and the height change rate is not greater than the set height change rate threshold value, determining that the ammonia gas in the gas phase zone leaks;
if the liquid ammonia liquid level height change value is not larger than the set height change threshold value and the height change rate is larger than the set height change rate threshold value, liquid ammonia leakage in the liquid phase region is determined;
and if the liquid level height change value of the liquid ammonia is not greater than the set height change threshold value and the height change rate is not greater than the set height change rate threshold value, determining that the ammonia gas in the gas phase zone leaks.
Further, the height information of the liquid phase region is as follows: and the difference value between the length of the liquid storage tank in the direction vertical to the liquid level of the liquid ammonia and the distance from the liquid level data acquisition device to the liquid level of the liquid ammonia is the height information of the liquid phase region.
Further, the valve information of the leakage is sent to the management module, and the management module comprises a number of the valve for monitoring the leakage of the ammonia gas and a management module for sending the ammonia gas concentration.
A liquid ammonia leakage monitoring device applying a liquid ammonia leakage monitoring method comprises a valve leakage monitoring device, an ammonia concentration monitoring device and a data processing module; the valve leakage monitoring device and the ammonia concentration monitoring device are respectively connected with the data processor.
The liquid ammonia leakage monitoring and testing system using the liquid ammonia leakage monitoring device comprises a data processing module, a leakage protection device, a liquid ammonia storage device monitoring module, an alarm device, a leakage judgment module and a management device;
the liquid ammonia leakage monitoring device, the leakage protection device, the liquid ammonia storage device monitoring module, the alarm device and the leakage judgment module are respectively connected with the management device and the data processing module;
the monitoring module of the liquid ammonia storage device is used for acquiring state data of the liquid ammonia storage tank and liquid ammonia state data;
the liquid ammonia leakage monitoring device is used for judging whether liquid ammonia leakage occurs or not according to the state data of the liquid ammonia storage tank and the liquid ammonia state data;
the leakage protection device is used for carrying out emergency automatic treatment according to the obtained liquid ammonia leakage condition;
the leakage judgment module is used for judging a leakage area according to the liquid level height change value and the height change rate of the liquid ammonia;
the alarm device is used for sending alarm information when liquid ammonia is leaked.
Preferably, the leakage protection device comprises a water mist module; the water mist module is connected with the data processing module.
Preferably, the monitoring module of the liquid ammonia storage device comprises a liquid ammonia liquid level data acquisition device and an air pressure monitoring device; the liquid ammonia liquid level data acquisition device and the air pressure monitoring device are respectively connected with the data processing module.
The invention has the beneficial effects that: by the technical scheme provided by the invention, the liquid ammonia leakage area can be positioned on the premise of finding liquid ammonia leakage in time, so that managers can find leakage points quickly and conveniently, accident treatment is carried out in time, and loss is reduced as much as possible.
Drawings
FIG. 1 is a schematic flow diagram of a method for monitoring liquid ammonia slip;
FIG. 2 is a schematic diagram of a liquid ammonia leak monitoring device;
FIG. 3 is a liquid ammonia slip monitoring test system.
Detailed Description
The technical solutions of the present invention are further described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following.
For the purpose of making the object, technical solution and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention. It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The features and properties of the present invention are described in further detail below with reference to examples.
As shown in fig. 1, a method for monitoring liquid ammonia leakage includes the following steps:
acquiring state data of a liquid ammonia storage tank and liquid ammonia state data through a monitoring module of a liquid ammonia storage device, wherein the state data of the liquid ammonia storage tank comprises the liquid ammonia liquid level height in the liquid ammonia storage tank, and dividing the liquid ammonia tank into a liquid phase region and a gas phase region according to the liquid ammonia liquid level height; the liquid ammonia state data comprise liquid ammonia liquid level height;
acquiring the environmental ammonia concentration through an ammonia concentration monitoring device in the liquid ammonia leakage monitoring device, generating and spraying water mist by a water mist module if the environmental ammonia concentration is greater than a set ammonia concentration safety concentration threshold value, covering the liquid ammonia tank through the water mist, and simultaneously sending an alarm by an alarm device;
step three, judging whether leakage occurs at the valve or not according to the concentration of liquid ammonia at the valve, which is acquired by the valve leakage monitoring device, if not, determining that leakage occurs at the tank body of the liquid ammonia tank, entering step four, and if so, sending the information of the valve with the leakage to a management module;
step four, obtaining a liquid ammonia liquid level height change value and a liquid ammonia liquid level height change rate according to the liquid ammonia liquid level height collected by the liquid ammonia liquid level data collection device in the accident period, judging whether liquid phase area liquid ammonia leakage exists or not according to the liquid ammonia liquid level height change value and the liquid ammonia liquid level height change rate, if yes, sending liquid phase area height information and alarm information to the management module, otherwise, sending gas phase area height information and alarm information to the management module; and completing liquid ammonia leakage monitoring.
The accident time interval is as follows: the ammonia concentration monitoring device collects a previous set time length of the moment when the environmental ammonia concentration is greater than the set ammonia concentration safety concentration threshold value.
According to the liquid ammonia liquid level height data that accident period liquid ammonia liquid level data acquisition device gathered, obtain liquid ammonia liquid level height variation value and height change rate, include: and obtaining a liquid ammonia liquid level height change value according to the liquid ammonia liquid level height data in the accident time period, wherein the ratio of the liquid ammonia liquid level height change value to the accident time period is a height change rate.
The liquid ammonia leakage in the liquid phase area is judged according to the liquid ammonia liquid level height change value and the height change rate, and the method comprises the following steps:
if the liquid level height change value of the liquid ammonia is larger than the set height change threshold value and the height change rate is larger than the set height change rate threshold value, liquid ammonia leakage in the liquid phase region is determined;
if the liquid level height change value of the liquid ammonia is greater than the set height change threshold value and the height change rate is not greater than the set height change rate threshold value, determining that the ammonia gas in the gas phase zone leaks;
if the liquid ammonia liquid level height change value is not larger than the set height change threshold value and the height change rate is larger than the set height change rate threshold value, liquid ammonia leakage in the liquid phase region is determined;
and if the liquid level height change value of the liquid ammonia is not greater than the set height change threshold value and the height change rate is not greater than the set height change rate threshold value, determining that the ammonia gas in the gas phase zone leaks.
The liquid phase region height information is as follows: and the difference value between the length of the liquid storage tank in the direction vertical to the liquid level of the liquid ammonia and the distance from the liquid level data acquisition device to the liquid level of the liquid ammonia is the height information of the liquid phase region.
The valve information that will appear leaking send management module to, including the management module that will monitor the serial number of the valve that the ammonia leaked and ammonia concentration and send.
The liquid ammonia leakage monitoring device comprises a valve leakage monitoring device, an ammonia concentration monitoring device and a data processor; the valve leakage monitoring device and the ammonia concentration monitoring device are respectively connected with the data processor. The liquid ammonia leakage monitoring device is used for judging whether liquid ammonia leakage occurs or not according to the state data of the liquid ammonia storage tank and the liquid ammonia state data;
the valve leakage monitoring device is used for monitoring whether the valve on the liquid ammonia storage tank leaks or not, and the ammonia concentration at the valve is monitored to determine whether the ammonia concentration exceeds a set concentration threshold value or not, and if the ammonia concentration exceeds the set concentration threshold value, the valve leakage monitoring device leaks.
The liquid ammonia leakage monitoring and testing system applying the liquid ammonia leakage monitoring device comprises a data processing module, a leakage protection device, a liquid ammonia storage device monitoring module, an alarm device, a leakage judgment module and a management device;
the liquid ammonia leakage monitoring device, the leakage protection device, the liquid ammonia storage device monitoring module, the alarm device and the leakage judgment module are respectively connected with the management device and the data processing module;
the monitoring module of the liquid ammonia storage device is used for acquiring state data of the liquid ammonia storage tank and liquid ammonia state data;
the leakage protection device is used for carrying out emergency automatic treatment according to the obtained liquid ammonia leakage condition;
the leakage judgment module is used for judging a leakage area according to the liquid level height change value and the height change rate of the liquid ammonia;
the alarm device is used for sending alarm information when liquid ammonia is leaked.
The leakage protection device comprises a water mist module; the water mist module is connected with the data processing module.
The water mist module is used for generating water mist to dissolve leaked ammonia gas, and the ammonia concentration monitoring device is used for acquiring the ammonia concentration of the environment where the liquid ammonia storage tank is located.
The monitoring module of the liquid ammonia storage device comprises a liquid ammonia liquid level data acquisition device and an air pressure monitoring device; the liquid ammonia liquid level data acquisition device and the air pressure monitoring device are respectively connected with the data processing module.
The liquid ammonia liquid level data acquisition device is used for acquiring the liquid ammonia liquid level height in the liquid ammonia storage tank, and the air pressure monitoring device is used for monitoring the air pressure in the gas phase area.
The foregoing is illustrative of the preferred embodiments of this invention, and it is to be understood that the invention is not limited to the precise form disclosed herein and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the concept as disclosed herein, either as described above or as apparent to those skilled in the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A liquid ammonia leakage monitoring method is characterized by comprising the following steps:
acquiring state data of a liquid ammonia storage tank and liquid ammonia state data through a monitoring module of a liquid ammonia storage device, wherein the state data of the liquid ammonia storage tank comprises the liquid ammonia liquid level height in the liquid ammonia storage tank, and dividing the liquid ammonia tank into a liquid phase region and a gas phase region according to the liquid ammonia liquid level height; the liquid ammonia state data comprise liquid ammonia liquid level height;
acquiring the environmental ammonia concentration through an ammonia concentration monitoring device in the liquid ammonia leakage monitoring device, generating and spraying water mist by a water mist module if the environmental ammonia concentration is greater than a set ammonia concentration safety concentration threshold value, covering the liquid ammonia tank through the water mist, and simultaneously sending an alarm by an alarm device;
step three, judging whether leakage occurs at the valve or not according to the concentration of liquid ammonia at the valve, which is acquired by the valve leakage monitoring device, if not, determining that leakage occurs at the tank body of the liquid ammonia tank, entering step four, and if so, sending the information of the valve with the leakage to a management module;
step four, obtaining a liquid ammonia liquid level height change value and a liquid ammonia liquid level height change rate according to the liquid ammonia liquid level height collected by the liquid ammonia liquid level data collection device in the accident period, judging whether liquid phase area liquid ammonia leakage exists or not according to the liquid ammonia liquid level height change value and the liquid ammonia liquid level height change rate, if yes, sending liquid phase area height information and alarm information to the management module, otherwise, sending gas phase area height information and alarm information to the management module; and completing liquid ammonia leakage monitoring.
2. A method as claimed in claim 1, wherein the accident time period is: the ammonia concentration monitoring device collects a previous set time length of the moment when the environmental ammonia concentration is greater than the set ammonia concentration safety concentration threshold value.
3. The method for monitoring liquid ammonia leakage according to claim 2, wherein the obtaining of the liquid ammonia level height variation value and the liquid ammonia level height variation rate according to the liquid ammonia level height data collected by the liquid ammonia level data collection device during the accident period comprises: and obtaining a liquid ammonia liquid level height change value according to the liquid ammonia liquid level height data in the accident time period, wherein the ratio of the liquid ammonia liquid level height change value to the accident time period is a height change rate.
4. The method for monitoring liquid ammonia leakage according to claim 3, wherein the determining whether liquid ammonia leakage occurs in the liquid phase region according to the liquid level height variation value and the height variation rate of the liquid ammonia comprises:
if the liquid level height change value of the liquid ammonia is larger than the set height change threshold value and the height change rate is larger than the set height change rate threshold value, liquid ammonia leakage in the liquid phase region is determined;
if the liquid level height change value of the liquid ammonia is greater than the set height change threshold value and the height change rate is not greater than the set height change rate threshold value, determining that the ammonia gas in the gas phase zone leaks;
if the liquid ammonia liquid level height change value is not larger than the set height change threshold value and the height change rate is larger than the set height change rate threshold value, liquid ammonia leakage in the liquid phase region is determined;
and if the liquid level height change value of the liquid ammonia is not more than the set height change threshold value and the height change rate is not more than the set height change rate threshold value, determining that the ammonia gas in the gas phase area leaks.
5. The method for monitoring the leakage of liquid ammonia as claimed in claim 1, wherein the height information of the liquid phase region is as follows: and the difference value between the length of the liquid storage tank in the direction vertical to the liquid level of the liquid ammonia and the distance from the liquid level data acquisition device to the liquid level of the liquid ammonia is the height information of the liquid phase region.
6. The method for monitoring the leakage of liquid ammonia according to claim 1, wherein the step of sending the information of the valve with the leakage to the management module comprises the step of sending the number of the valve with the leakage of the ammonia gas monitored and the ammonia gas concentration to the management module.
7. A liquid ammonia leakage monitoring apparatus to which the method of monitoring liquid ammonia leakage according to any one of claims 1 to 6 is applied, comprising a valve leakage monitoring means, an ammonia concentration monitoring means, a data processor; the valve leakage monitoring device and the ammonia concentration monitoring device are respectively connected with the data processor.
8. The liquid ammonia leakage monitoring and testing system using the liquid ammonia leakage monitoring device according to claim 7, comprising a data processing module, a leakage protection device, a liquid ammonia storage device monitoring module, an alarm device, a leakage judgment module, and a management device;
the liquid ammonia leakage monitoring device, the leakage protection device, the liquid ammonia storage device monitoring module, the alarm device and the leakage judgment module are respectively connected with the management device and the data processing module;
the monitoring module of the liquid ammonia storage device is used for acquiring state data of the liquid ammonia storage tank and liquid ammonia state data;
the leakage protection device is used for carrying out emergency automatic treatment according to the obtained liquid ammonia leakage condition;
the leakage judgment module is used for judging a leakage area according to the liquid ammonia liquid level height change value and the height change rate;
the alarm device is used for sending alarm information when liquid ammonia is leaked.
9. The liquid ammonia leak monitoring and testing system of claim 8, wherein said leak protection device comprises a water mist module; the water mist module is connected with the data processing module.
10. The liquid ammonia leakage monitoring and testing system of claim 8, wherein the liquid ammonia storage device monitoring module comprises a liquid ammonia liquid level data acquisition device and an air pressure monitoring device; the liquid ammonia liquid level data acquisition device and the air pressure monitoring device are respectively connected with the data processing module.
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