Application of Accra fire protection products in the petrochemical industry

Ren Yunye Ankerui Electric Co.
, Ltd.
Shanghai Jiading [Abstract]: Improper use of electrical equipment in the petrochemical industry and short circuit, overload, poor contact, etc.
, are the main causes
of fire accidents.

From the perspective of preventing fire occurrence and power maintenance of fire fighting equipment, Acquarium briefly elaborated on the importance of electrical fire and fire equipment power monitoring system for
petrochemical enterprises.

Combined with the development needs and engineering practice of smart fire protection, the integrated configuration scheme of fire monitoring system is discussed, emphasizing the prevention of fire, so as to effectively avoid a series of problems
such as casualties, economic losses and environmental damage in the fire belt.

【Keywords】:Electrical fire monitoring system; Fire equipment power monitoring system; Fire surveillance; Integration ; Petrochemical; 1.
Foreword According to the Fire Rescue Bureau of the Ministry of Emergency Management of the People's Republic of China, the national fire and fire rescue police and police situation in 2020 were reported, and a total of 252,000 fire alarms were reported nationwide, 1,183 people were killed, 775 people were injured, and the direct property loss reached 4.
009 billion yuan
.

There were 85,000 fires nationwide due to violations of electrical installation and use regulations, accounting for 33.
6% of the total; There were 36 large fires caused by electrical faults, accounting for 55.
4%
of the total number of larger fires.

Statistics show that fires caused by short circuits, overloads, poor contact and other line problems account for 68.
9% of the total number of electrical fires; Fires caused by equipment failure, improper use and other reasons accounted for 4.
9%
of the total number of electrical fires.

In summary, it can be seen that there are many fire accidents caused by electrical equipment and line failures, and short circuits, overloads, poor contact and other line failures are the main causes
of electrical fires.

There are many kinds of electrical equipment in petrochemical enterprises, and they have been in uninterrupted operation for a long time
.

In addition to subjective factors such as violations of operating regulations, weak awareness of safety management, there are also many objective factors, such as with the increase of the production life of the enterprise electrical equipment and line insulation gradually aging, the service life of electrical equipment and seasonal factors caused by leakage and short circuit hidden dangers are also gradually increasing, these gradient electrical failures mostly occur in electrical equipment and distribution lines through the pipe inside, in the early stage of electrical failure caused by fire, these hidden parts are not easy to find, when the fire spreads, It brought great difficulties
to the save.

At the same time, due to the particularity of the petrochemical industry, the fire is likely to cause the leakage of toxic and harmful media in the explosion accident, which will cause serious casualties, economic losses, environmental damage and other irreparable impacts
.

Therefore, it is of special importance for petrochemical enterprises to set up electrical fire monitoring systems and power supply monitoring systems for
fire fighting equipment.

1.
The fire prevention measures involved in the setting of the Acrel electrical fire monitoring system are not for the prevention of a specific part, but for the systematic prevention from the line, cable to the terminal of the electrical equipment, the systematic prevention from the power supply side to the terminal of the electrical equipment, the hierarchical prevention from the power supply side to the power load side, and the functional prevention from the residual current of the line, the line temperature to the arc detection of the power load failure
.

1.
1 The composition of Acrel electrical fire monitoring system Acrel-6000 electrical fire monitoring system is mainly composed of electrical fire monitoring equipment, residual current type electrical fire monitoring detector, temperature measurement type electrical fire monitoring detector and fault arc detector and other parts or all, as shown in Figure 1 below
.

Figure 1.
Electrical fire monitoring system Picture Ankerui electrical fire monitoring equipment can receive and process the leakage, temperature and fault arc signals sent by each detector in real time, and display on the LCD screen at the same time, when leakage, ultra-temperature and fault arc alarm and power or communication failure, monitoring equipment can issue sound and light alarm signal, display fault location and alarm type on the screen, and have data storage, query and alarm control signal output and other functions, Remote reset control of the detector is also available
.

By collecting a variety of parameters to predict gradient electrical faults caused by different causes such as short circuits and overloads of electrical lines, various fire hazards can be killed in advance at the initial stage
.

1.
2 The setting of the electrical fire monitoring system of the petrochemical production plant The principle of the electrical fire monitoring system is to prevent the fire location of the first-level line failure of the electrical equipment, in order to meet the usual continuous production requirements of the petrochemical production equipment, the power
supply of the electric load should not be easily cut off.

Therefore, in most cucumbers, the system is only used for alarms, not for tripping
.

The system detects the operation of the electrical circuit through the electrical fire detector and collects relevant data, when the abnormal leakage current, temperature rise and fault arc of the detected line occur, the electrical fire monitoring equipment will display the fault detector location information and data information, and remind the operation and maintenance personnel to check the accident
in time through the sound and light alarm.

The system seats a separate subsystem of the plant-wide automatic fire alarm system, and when the system is alarmed, the alarm signal can also be transmitted to the fire alarm system
at the same time.

GB50116-2013 "Design Code for Automatic Fire Alarm System" recommends that the action value of the residual current detector is 300~500mA; GB51348-2019 "Civil Electrical Building Design Code" recommends that the residual current action value of the electrical fire monitoring system should be 300mA; GB50054-2011 "Low Voltage Distribution Design Code" stipulates: In order to reduce the risk of electrical fire, the remaining current of the installed equipment should not be greater than 300mA
.

Given the relevant provisions in the above specifications, the alarm threshold for residual current detection in the electrical fire monitoring system is usually set to 300mA
in engineering practice.

The site installation diagram of the electrical fire product part is shown in Figure 2 and Figure 3
.

Figure 2.
On-site installation of low-voltage distribution room Figure 3.
On-site installation of strong electric room 2.
Acrel fire protection equipment power monitoring system The fire engineering is a systematic project, and the common fire-fighting electrical equipment mainly includes: fire exhaust fan, fire supply (air supply) fan, fire pump, fire foam device, fire spray or rain valve system in situ control box and non-centralized control emergency lighting, electric fire roller shutter door, fire elevator, fire automatic alarm system, etc
。
These fire-fighting electrical equipment play an important role in controlling the spread of fire, ensuring the evacuation of personnel, rescue and other aspects, which can reduce the casualties and economic losses
caused by fire to a certain extent.

In the production situation, most of these equipment is in a hot standby state, only need to be put into work when a fire occurs, if there is a problem with the power supply of the fire fighting equipment, it will cause these fire fighting equipment to be useless
.

In this way, it is particularly important
to ensure the reliability of the power supply of these firefighting electrical equipment.

In the petrochemical industry, the power supply monitoring system of fire fighting equipment is mainly composed of two layers of fire equipment power status monitor and voltage and current sensor, which can effectively realize the real-time monitoring of fire fighting equipment and feedback the working status of fire fighting equipment power supply, which has an escorting effect on improving the fire safety management of
petrochemical enterprises.

2.
1 The composition of the Acrel fire equipment power monitoring system The Acrel fire equipment power monitoring system is mainly composed of a fire equipment power status monitor, a regional extension, a voltage sensor, a current sensor, a voltage/current sensor, etc.
Part or all, as shown in Figure 4 below
.

Figure 4.
Fire equipment power supply monitoring system Figure Ankerui fire equipment power supply status monitor adopts centralized and modular design, mating sensors, through the fire equipment power supply voltage, current, switch status and other operating information, fault alarm information and so on to monitor and store, analyze, statistics, convenient for users to monitor and manage; Through the human-machine interface, the data of the power supply of fire fighting equipment is summarized and displayed, with functions
such as management, viewing, alarm, and printing.

When the fire fighting electrical equipment has faults such as circuit breakage, overvoltage, undervoltage, phase loss, overload, etc.
, the sound and light alarm signal is issued to remind the operation and maintenance personnel to check and deal
with it in time.

2.
2 Precautions for the design of the power supply monitoring system of petrochemical fire fighting equipmentPetrochemical enterprises usually adopts the direct power supply method
of substation radiation.

If the monitoring point of the power supply monitoring system of the fire fighting equipment is close to the outlet end of the distribution equipment of the substation, when the fire distribution line fails, the system will not be able to truthfully feedback the actual situation
of the receiving end of the electrical equipment.

Therefore, the installation position of the voltage/current sensor with the system should, in principle, be as close as possible to the end of the fire fighting electrical equipment to ensure that it is eliminated as much as possibleEffectiveness
of anti-power supply monitoring.

The site installation diagram of the part of the fire equipment power monitoring product is shown in Figure 5 and Figure 6
.

Figure 5 Figure 63.
With the continuous strengthening of the fire safety awareness of petrochemical enterprises, in order to reduce the casualties, economic losses, environmental damage and other problems caused by the fire as much as possible, the current fire concept has gradually shifted from the traditional time of fire extinguishing to relying on scientific and technological means and emerging technologies, to achieve fire early warning and agriculture
.

Electrical fire monitoring system and fire equipment power monitoring system have an important role and significance in the electrical fire prevention and control, fire power monitoring of petrochemical enterprises references: [1].
Liu Yang
.

Discussion on Petrochemical Electrical Fire Prevention and Power Supply Monitoring of Fire Protection Equipment[j]Petrochemical Automation,2021.
0[2].
GB50116-2013 Design specification for automatic fire alarm system[S].
[3].
GB14287-2014 Electrical fire monitoring system[S].
[4].
GB28184-2011 Power supply monitoring system for fire fighting equipment[S].
[5].
GB51348-2019 Civil electrical building design code[S].
[6].
GB50054-2011 Low voltage power distribution design specification[S].
Author's profile: Ren Yunye, male, Ankerui Electric Co.
, Ltd.