CN115076608A - Natural gas odorization equipment early warning system and early warning method - Google Patents
Natural gas odorization equipment early warning system and early warning method Download PDFInfo
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- CN115076608A CN115076608A CN202210556375.0A CN202210556375A CN115076608A CN 115076608 A CN115076608 A CN 115076608A CN 202210556375 A CN202210556375 A CN 202210556375A CN 115076608 A CN115076608 A CN 115076608A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/12—Arrangements for supervising or controlling working operations for injecting a composition into the line
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/005—Protection or supervision of installations of gas pipelines, e.g. alarm
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
- F17D5/06—Preventing, monitoring, or locating loss using electric or acoustic means
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/182—Level alarms, e.g. alarms responsive to variables exceeding a threshold
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/24—Reminder alarms, e.g. anti-loss alarms
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B5/00—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied
- G08B5/22—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission
- G08B5/36—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission using visible light sources
- G08B5/38—Visible signalling systems, e.g. personal calling systems, remote indication of seats occupied using electric transmission; using electromagnetic transmission using visible light sources using flashing light
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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Abstract
The invention discloses a natural gas odorization equipment early warning system and an early warning method, wherein the early warning system comprises: the device comprises an odorizing module, an upper computer, a liquid level detection module, a leakage acquisition module and a PLC automatic control module; the PLC automatic control module is in communication connection with an upper computer and can perform visual alarm work through the upper computer; the PLC automatic control module comprises a PLC automatic control box. The early warning system can effectively early warn that the odorizing agent concentration of the natural gas odorizing equipment is insufficient, and reduce the influence of the insufficient odorizing agent concentration on the insufficient concentration at the tail end of the natural gas pipeline; the odorizing agent leakage condition of the odorizing system is early warned, and the safety of workers is improved; the natural gas leakage is warned, and the safety of workers is improved.
Description
Technical Field
The invention relates to the technical field of natural gas odorization, in particular to a natural gas odorization equipment early warning system and an early warning method.
Background
Natural gas is one of the essential energy sources in industry and life because of its advantages of environmental protection, economy, practicability and the like. Natural gas is mainly composed of alkanes, most of which are methane, with small amounts of ethane, propane and butane, and generally contains hydrogen sulfide, carbon dioxide, nitrogen and moisture, and small amounts of carbon monoxide and trace amounts of noble gases such as helium and argon. At present, before natural gas is sent to an end user, in order to facilitate leakage detection, odorizing agent is added to the natural gas, so that the natural gas can give an early warning and reminding to the user when natural gas leakage occurs, and the minimum amount of odorizing agent in the natural gas meets the following regulations: 1. toxic gas should be detected before leaking into the air to reach the harmful concentration allowed for human body; 2. the non-toxic gas leaks into the air, and can be detected when the non-toxic gas reaches 20% of the lower explosion limit. Therefore, the natural gas is subjected to the odorizing treatment by the odorizing device before being input to each user.
In the natural gas odorizing device, the phenomenon of weeping can appear after using a period of years in the odorizing agent storage jar, generally appear behind the weeping phenomenon, can unmanned discovery occasionally even, lead to seriously leaking, and sometimes after on-the-spot operating personnel can smell the stink, can inform relevant maintenance personal to maintain, nevertheless because do not have control measure, it can have a period of time to reach the on-the-spot maintenance to maintain between the position of revealing to inform maintenance personal at operating personnel, in this time, the odorizing agent can continuously reveal, cause the large tracts of land diffusion of odorizing agent that the odorizing agent storage jar revealed, the pollution degree to operating personnel operational environment has been increased.
On the other hand, the specific remaining amount of the odorant in the conventional odorizing device is invisible, and even if some odorizing devices can be visualized, the approximate time for liquid replenishment is also judged according to the experience of workers, and if forgetting occurs or the work is not handed over after shift change, the functions of warning prompt and the like are not provided to remind the workers to replenish the liquid in time. Furthermore, in the process of odorizing natural gas, natural gas sometimes flows back to odorizing equipment due to various reasons such as pressure, temperature, peak value of gas consumption of users and the like, so that accidents are caused due to leakage caused by methane backflow in a natural gas pipeline, and safety is damaged, and therefore detection and effective early warning for methane backflow in the natural gas pipeline are also needed to be solved at present.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a natural gas odorizing device early warning system and an early warning method, which can early warn that the odorizing agent concentration of the natural gas odorizing device is insufficient, and reduce the influence of the insufficient odorizing agent concentration on the insufficient concentration at the tail end of a natural gas pipeline; the odorizing agent leakage condition of the odorizing system is early warned, and the safety of workers is improved; the natural gas leakage is warned in advance, the safety of workers is improved, and the problems in the background technology are solved.
In order to achieve the purpose, the invention provides the following technical scheme: a natural gas odorizing device early warning system, the early warning system comprising: the device comprises an odorizing module, an upper computer (1), a liquid level detection module, a leakage acquisition module and a PLC automatic control module; the PLC automatic control module is in communication connection with the upper computer (1) and can perform visual alarm work through the upper computer; the PLC automatic control module comprises a PLC automatic control box (9).
Preferably, the odorizing module comprises an injecting diaphragm pump (6) and an odorizing agent liquid tank (4), the injecting diaphragm pump is connected with the odorizing agent liquid tank, the injecting diaphragm pump (6) is connected with a PLC automatic control box (9) through an electric connection line, and the injecting frequency of the injecting diaphragm pump (6) to the natural gas transmission pipeline (10) is adjusted in real time through a signal sent by the PLC automatic control box.
Preferably, the liquid level detection module comprises a magnetic turning plate liquid level meter (3) and an electromagnetic liquid level meter (5), and the magnetic turning plate liquid level meter (3) is arranged on the side wall of the tank body of the odorizing agent liquid tank, so that the liquid level visualization of the odorizing agent liquid tank on site can be realized; the electromagnetic liquid level meter (5) is connected with the PLC automatic control box (9) through an electric connecting line, and transmits a current liquid level signal to the PLC automatic control box; the electromagnetic liquid level meter has self-verification and alarm functions, collects daily liquid level data, performs self-verification by itself, and transmits self-verification values and alarm value signals to the PLC automatic control box.
Preferably, the leakage acquisition module comprises a methyl acrylate detector (7) and a methane detector (2), and the methyl acrylate detector (7) and the methane detector (2) are both connected with a PLC automatic control box (9) through electric wires; the methyl acrylate detector (7) is arranged on the left lower side outside the odorizing agent liquid tank body, and the height from the ground is 20-30 cm; the methane detector (2) is arranged at the right upper side outside the odorizing agent liquid tank body and close to the top of the cabinet body.
Preferably, host computer (1) in be provided with alarm module and odorizing agent expected days display screen (16), alarm module includes 5 alarm device, is green alarm flashing lamp (11), yellow alarm flashing lamp (12), purple alarm flashing lamp (13), red alarm flashing lamp (14) and blue alarm flashing lamp (15) respectively.
Preferably, the methyl acrylate detector detects that the concentration of the methyl acrylate reaches 5mg/m 3 When the alarm is started, a green alarm flashing lamp (11) in the alarm module in the upper computer starts to alarm; the methyl acrylate detector detects that the concentration of the methyl acrylate reaches 10mg/m 3 When the alarm is started, a yellow alarm flashing lamp (12) in the alarm module in the upper computer starts to alarm; the methyl acrylate detector detects that the concentration of the methyl acrylate reaches 20mg/m 3 When the alarm is started, a purple alarm flashing lamp (13) in the alarm module in the upper computer starts to alarm; when the methane detector detects that the methane reaches 25ppm, a red alarm flashing lamp (14) in an alarm module in the upper computer starts to be started to alarm.
Preferably, when the electromagnetic liquid level meter (5) carries out self-checking, when detecting that the liquid level in the odorizing agent liquid tank is lower than the minimum liquid level line threshold value, send alarm signal transmission to PLC automatic control module, then carry out the police dispatch newspaper through blue alarm flashing lamp (15) in the host computer, remind the liquid supplementing work that needs to carry out.
Preferably, the minimum liquid level line threshold is specifically 15% of the tank allowance.
Preferably, the bottom of the odorizing agent liquid tank (4) is provided with an electromagnetic cut-off valve (8), and when the methyl acrylate detector (7) detects that the concentration of the methyl acrylate reaches 15mg/m 3 When the device is used, the odorizing agent liquid tank is judged to be leaked, the upper computer sends a signal to control the PLC automatic control module to cut off the electromagnetic cut-off valve, and continuous leakage is avoided.
In addition, in order to achieve the purpose, the invention also provides the following technical scheme: an early warning method of natural gas odorization equipment comprises the following steps:
s1, assembling an early warning system: an electromagnetic liquid level meter (5), a filling diaphragm pump (6), a methyl acrylate detector (7) and a methane detector (2) are respectively connected with a PLC automatic control box (9) through electric wires, the PLC automatic control box is in communication connection with an upper computer (1), and visual alarm work is carried out through the upper computer;
s2, odorant expected days show: the liquid level of the odorizing agent liquid tank is collected through an electromagnetic liquid level meter (5), the electromagnetic liquid level meter collects daily liquid level data and transmits the data to an upper computer through a PLC automatic control box, the upper computer calculates the recent filling condition and the liquid tank allowance, and expected days are displayed through an odorizing agent expected days display screen (16), so that the scheduled arrangement of liquid replenishing by working personnel is facilitated;
s3, leakage data acquisition and judgment: detecting the concentration of methyl acrylate by using a methyl acrylate detector (7), and judging whether the odorizing agent leakage exists in the odorizing agent liquid tank; detecting the concentration of methane by using a methane detector (2) and judging whether methane backflow exists or not;
s4, early warning: when the odorizing agent is judged to be leaked, starting a corresponding alarm flashing lamp in an alarm module in the upper computer to alarm according to different values of the methyl acrylate concentration detected by the methyl acrylate detector;
when the concentration of methyl acrylate is detected to reach a certain threshold value, a solenoid cut-off valve (8) arranged at the bottom of the odorizing agent liquid tank is cut off to avoid continuous leakage;
when methane backflow is judged to exist, a red alarm flashing lamp (14) in an alarm module in the upper computer is started to alarm;
when detecting that the liquid level in the odorizing agent liquid tank is lower than the minimum liquid level line threshold value, send alarm signal transmission to PLC automatic control module, start blue alarm flashing lamp (15) among the alarm module in the host computer, carry out the police dispatch newspaper, remind and need carry out the fluid replacement work.
The invention has the beneficial effects that: the early warning system can realize liquid level visualization, visualize the expected remaining days of odorizing liquid level, and warn and remind workers to replenish liquid; the system can perform early warning on odorizing agent leakage, perform early warning of different leakage concentrations to different degrees, and perform operations such as leakage cutting and the like when the leakage reaches a certain threshold value; meanwhile, the methane backflow warning device can effectively warn methane backflow and improve the safety of workers.
Drawings
FIG. 1 is a schematic diagram of a system framework of the present invention;
FIG. 2 is a schematic diagram of the system of the present invention;
FIG. 3 is a schematic diagram of a host computer;
in the figure, 1-an upper computer, 2-a methane detector, 3-a magnetic turning plate liquid level meter, 4-an odorizing agent liquid tank, 5-an electromagnetic liquid level meter, 6-a filling diaphragm pump, 7-a methyl acrylate detector, 8-an electromagnetic cut-off valve, 9-a PLC automatic control box, 10-a natural gas pipeline, 11-a green alarm flashing lamp, 12-a yellow alarm flashing lamp, 13-a purple alarm flashing lamp, 14-a red alarm flashing lamp, 15-a blue alarm flashing lamp and 16-an odorizing agent expected days display screen.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, the present invention provides a technical solution: a natural gas odorizing device early warning system, module frame constitution is as shown in figure 1, the early warning system includes: the device comprises an odorizing module, an upper computer 1, a liquid level detection module, a leakage acquisition module and a PLC automatic control module; the PLC automatic control module is in communication connection with the upper computer 1, and visual alarm work can be carried out through the upper computer; the PLC automatic control module comprises a PLC automatic control box 9.
Further, the odorizing module comprises an injection diaphragm pump 6 and an odorizing agent liquid tank 4, the injection diaphragm pump is connected with the odorizing agent liquid tank, the injection diaphragm pump 6 is connected with a PLC automatic control box 9 through an electric connection line, and the injection frequency of the injection diaphragm pump 6 to the natural gas pipeline 10 is adjusted in real time through signals sent by the PLC automatic control box.
Furthermore, two liquid level detection modules which can be used for visualizing the liquid content of the odorizing agent liquid tank are provided, wherein the two liquid level detection modules comprise a magnetic turning plate liquid level meter 3 and an electromagnetic liquid level meter 5, and the magnetic turning plate liquid level meter 3 is arranged on the side wall of the tank body of the odorizing agent liquid tank, so that the field odorizing agent liquid tank liquid level visualization can be realized; the electromagnetic liquid level meter 5 is connected with the PLC automatic control box 9 through an electric connecting line, and transmits a current liquid level signal to the PLC automatic control box; the electromagnetic liquid level meter has self-verification and alarm functions, collects daily liquid level data, performs self-verification by itself, and transmits self-verification values and alarm value signals to the PLC automatic control box. In the operation process of the on-site odorizing machine, the lowest liquid level line threshold value is 15% of the residual amount of the tank body, and liquid supplementing operation is needed when the residual liquid level is 15% lower than the residual amount of the tank body.
In this system, there are two kinds of implementation, firstly, acquire the liquid level surplus through electromagnetism level gauge data acquisition and realize, secondly, do the calculation to filling speed recently and fluid reservoir surplus through the host computer, obtain jar body surplus and be less than 15% expected number of days, and show expected number of days through odorizing agent expected number of days display screen 16, inform the staff in advance, also avoid simple experience that depends on the staff to judge, avoid the major accident because of the work fault leads to, more help improving enterprise's fortune, increase enterprise's flexibility ratio.
Further, the leakage collecting moduleThe device comprises a methyl acrylate detector 7 and a methane detector 2, wherein the methyl acrylate detector 7 and the methane detector 2 are both connected with a PLC automatic control box 9 through electric connecting wires; because the density of the methyl acrylate is greater than that of the air, the methyl acrylate detector 7 is arranged at the left lower side outside the odorizing agent liquid tank body and is 20-30cm away from the ground, the methyl acrylate detector adopts an electrochemical detection principle and is connected to a PLC (programmable logic controller) through an electric connecting line, the PLC communicates with an upper computer to perform visualization work, and the upper computer alarms that the alarm concentration of the methyl acrylate is 5mg/m 3 ,10mg/m 3 ,20mg/m 3 And waiting for 3 levels, and respectively visualizing (different light flashing alarms) to be positioned in an upper computer.
The density of methane is greater than the air, sets up methane detection appearance 2 at the upper right side of the external portion of odorizing agent fluid reservoir jar, is close to the position at cabinet body top, detects whether a large amount of methane still exist in the odorizing device, and methane backward flow leads to leaking the initiation accident in the prevention natural gas transmission pipeline, is favorable to improving the security.
Further, host computer 1 in be provided with alarm module and odorizing agent expected days display screen 16, alarm module includes 5 alarm device, is green alarm flashing lamp 11, yellow alarm flashing lamp 12, purple alarm flashing lamp 13, red alarm flashing lamp 14 and blue alarm flashing lamp 15 respectively.
Further, the methyl acrylate detector detects that the concentration of the methyl acrylate reaches 5mg/m 3 When the alarm is started, a green alarm flashing lamp 11 in the alarm module in the upper computer starts to alarm; the methyl acrylate detector detects that the concentration of the methyl acrylate reaches 10mg/m 3 When the alarm is started, a yellow alarm flashing lamp 12 in the alarm module in the upper computer starts to alarm; the methyl acrylate detector detects that the concentration of the methyl acrylate reaches 20mg/m 3 When the alarm is started, a purple alarm flashing lamp 13 in the alarm module in the upper computer starts to alarm; when the methane detector detects that the methane reaches 25ppm, a red alarm flashing lamp 14 in the alarm module in the upper computer starts to be started to alarm.
Further, when electromagnetic level meter 5 carries out the self-checking, when detecting that the liquid level in the odorizing agent liquid tank is less than minimum liquid level line threshold value, send alarm signal transmission to PLC automatic control module, then carry out the police dispatch newspaper through blue alarm flashing lamp 15 in the host computer, remind the work of need carrying out the fluid infusion.
Further, the bottom of the odorizing agent liquid tank 4 is provided with an electromagnetic cut-off valve 8, and when the methyl acrylate detector 7 detects that the concentration of the methyl acrylate reaches 15mg/m 3 When the device is used, the odorizing agent liquid tank is judged to be leaked, the upper computer sends a signal to control the PLC automatic control module to cut off the electromagnetic cut-off valve, and continuous leakage is avoided.
An early warning method of natural gas odorization equipment comprises the following steps:
s1, assembling an early warning system: an electromagnetic liquid level meter 5, a filling diaphragm pump 6, a methyl acrylate detector 7 and a methane detector 2 are respectively connected with a PLC automatic control box 9 through electric wires, the PLC automatic control box is in communication connection with an upper computer 1, and visual alarm work is carried out through the upper computer;
s2, odorant expected days show: the liquid level of the odorizing agent liquid tank is collected through an electromagnetic liquid level meter 5, the electromagnetic liquid level meter collects daily liquid level data and transmits the data to an upper computer through a PLC automatic control box, the upper computer calculates the recent filling condition and the liquid tank allowance, and the expected days are displayed through an odorizing agent expected days display screen 16, so that the arrangement of liquid supplement by a worker is facilitated;
s3, leakage data acquisition and judgment: detecting the concentration of methyl acrylate by using a methyl acrylate detector 7, and judging whether the odorizing agent leakage exists in the odorizing agent liquid tank; detecting the methane concentration by using a methane detector 2, and judging whether methane reflux exists or not;
s4, early warning: when the odorizing agent is judged to be leaked, starting a corresponding alarm flashing lamp in an alarm module in the upper computer to alarm according to different values of the methyl acrylate concentration detected by the methyl acrylate detector;
when the concentration of the methyl acrylate is detected to reach a certain threshold value, the electromagnetic cut-off valve 8 arranged at the bottom of the odorizing agent liquid tank is cut off to avoid continuous leakage;
when the methane backflow is judged to exist, a red alarm flashing lamp 14 in an alarm module in the upper computer is started to alarm;
when detecting that the liquid level in the odorizing agent liquid tank is lower than the minimum liquid level line threshold value, send alarm signal transmission to PLC automatic control module, start blue alarm flashing lamp 15 in the alarm module in the host computer, carry out the police dispatch newspaper, remind and need carry out the fluid replacement work.
The early warning system can effectively early warn of the insufficient concentration of the odorizing machine, reduce the influence of the insufficient concentration of the odorizing agent on the insufficient concentration of the tail end of the natural gas pipeline, early warn of the odorizing agent leakage condition of the odorizing machine system, improve the safety of workers, early warn of natural gas leakage and improve the safety of the workers.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (10)
1. A natural gas odorizing device early warning system, the early warning system comprising: the device comprises an odorizing module, an upper computer (1), a liquid level detection module, a leakage acquisition module and a PLC automatic control module; the PLC automatic control module is in communication connection with the upper computer (1) and can perform visual alarm work through the upper computer; the PLC automatic control module comprises a PLC automatic control box (9).
2. The natural gas odorizing device early warning system according to claim 1, wherein: the odorizing module comprises an odorizing membrane pump (6) and an odorizing agent liquid tank (4), the odorizing membrane pump is connected with the odorizing agent liquid tank, the odorizing membrane pump (6) is connected with a PLC automatic control box (9) through an electric connection line, and the odorizing frequency of the odorizing membrane pump (6) to a natural gas pipeline (10) is adjusted in real time through signals sent by the PLC automatic control box.
3. The natural gas odorizing device early warning system according to claim 1, wherein: the liquid level detection module comprises a magnetic turning plate liquid level meter (3) and an electromagnetic liquid level meter (5), wherein the magnetic turning plate liquid level meter (3) is arranged on the side wall of the tank body of the odorizing agent liquid tank, so that the visual visualization of the liquid level of the odorizing agent liquid tank on site can be realized; the electromagnetic liquid level meter (5) is connected with the PLC automatic control box (9) through an electric connecting line, and transmits a current liquid level signal to the PLC automatic control box; the electromagnetic liquid level meter has self-verification and alarm functions, collects daily liquid level data, performs self-verification by itself, and transmits self-verification values and alarm value signals to the PLC automatic control box.
4. The natural gas odorizing device early warning system according to claim 1, wherein: the leakage acquisition module comprises a methyl acrylate detector (7) and a methane detector (2), and the methyl acrylate detector (7) and the methane detector (2) are both connected with a PLC automatic control box (9) through electric wires; the methyl acrylate detector (7) is arranged on the left lower side outside the odorizing agent liquid tank body, and the height from the ground is 20-30 cm; the methane detector (2) is arranged at the right upper side outside the odorizing agent liquid tank body and close to the top of the cabinet body.
5. The natural gas odorizing device early warning system according to claim 1, wherein: host computer (1) in be provided with alarm module and odorizing agent expected days display screen (16), alarm module includes 5 alarm device, is green warning flashing lamp (11), yellow warning flashing lamp (12), purple warning flashing lamp (13), red warning flashing lamp (14) and blue warning flashing lamp (15) respectively.
6. The natural gas odorizing device early warning system according to claim 4, wherein: the methyl acrylate detector detects that the concentration of the methyl acrylate reaches 5mg/m 3 When the alarm is started, a green alarm flashing lamp (11) in the alarm module in the upper computer starts to be startedMoving and alarming; the methyl acrylate detector detects that the concentration of the methyl acrylate reaches 10mg/m 3 When the alarm is started, a yellow alarm flashing lamp (12) in the alarm module in the upper computer starts to alarm; the methyl acrylate detector detects that the concentration of the methyl acrylate reaches 20mg/m 3 When the alarm is started, a purple alarm flashing lamp (13) in an alarm module in the upper computer starts to alarm; when the methane detector detects that the methane reaches 25ppm, a red alarm flashing lamp (14) in an alarm module in the upper computer starts to be started to alarm.
7. The natural gas odorizing device early warning system according to claim 3, wherein: when carrying out the self-checking in electromagnetism level gauge (5), when detecting the liquid level in the odorant liquid tank and being less than minimum liquid level line threshold value, send alarm signal transmission to PLC automatic control module, then carry out the police dispatch newspaper through blue alarm flashing lamp (15) in the host computer, remind the work of need carrying out the fluid infusion.
8. The natural gas odorizing device early warning system according to claim 7, wherein: the lowest liquid level line threshold is specifically 15% of the tank body allowance.
9. The natural gas odorizing device early warning system according to claim 2, wherein: the bottom of the odorizing agent liquid tank (4) is provided with an electromagnetic cut-off valve (8), and when the methyl acrylate detector (7) detects that the concentration of the methyl acrylate reaches 15mg/m 3 When the device is used, the odorizing agent liquid tank is judged to be leaked, the upper computer sends a signal to control the PLC automatic control module to cut off the electromagnetic cut-off valve, and continuous leakage is avoided.
10. A warning method of a natural gas odorizing device warning system according to any one of claims 1 to 9, characterized by: the method comprises the following steps:
s1, assembling an early warning system: an electromagnetic liquid level meter (5), a filling diaphragm pump (6), a methyl acrylate detector (7) and a methane detector (2) are respectively connected with a PLC automatic control box (9) through electric wires, the PLC automatic control box is in communication connection with an upper computer (1), and visual alarm work is carried out through the upper computer;
s2, odorant expected days show: the liquid level of the odorizing agent liquid tank is collected through an electromagnetic liquid level meter (5), the electromagnetic liquid level meter collects daily liquid level data and transmits the data to an upper computer through a PLC automatic control box, the upper computer calculates the recent filling condition and the liquid tank allowance, and expected days are displayed through an odorizing agent expected days display screen (16), so that the scheduled arrangement of liquid replenishing by working personnel is facilitated;
s3, leakage data acquisition and judgment: detecting the concentration of methyl acrylate by using a methyl acrylate detector (7), and judging whether the odorizing agent leakage exists in the odorizing agent liquid tank; detecting the concentration of methane by using a methane detector (2) and judging whether methane backflow exists or not;
s4, early warning: when the odorizing agent is judged to be leaked, starting a corresponding alarm flashing lamp in an alarm module in the upper computer to alarm according to different values of the methyl acrylate concentration detected by the methyl acrylate detector;
when the concentration of methyl acrylate is detected to reach a certain threshold value, a solenoid cut-off valve (8) arranged at the bottom of the odorizing agent liquid tank is cut off to avoid continuous leakage;
when methane backflow is judged to exist, a red alarm flashing lamp (14) in an alarm module in the upper computer is started to alarm;
when detecting that the liquid level in the odorizing agent liquid tank is lower than the minimum liquid level line threshold value, send alarm signal and transmit to PLC automatic control module, start blue alarm flashing lamp (15) among the alarm module in the host computer, report to the police, remind and need carry out the fluid replacement work.
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| CN115681821A (en) * | 2022-12-13 | 2023-02-03 | 成都秦川物联网科技股份有限公司 | Automatic odorizing control method for intelligent gas equipment management and Internet of things system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115681821A (en) * | 2022-12-13 | 2023-02-03 | 成都秦川物联网科技股份有限公司 | Automatic odorizing control method for intelligent gas equipment management and Internet of things system |
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