How to correctly set up gas detection devices in petroleum a

In the production process of petrochemical plants, combustible / toxic gas leakage may occur. Therefore, higher requirements are put forward for safety. It is very important to set detection and alarm devices according to national standards in places involving combustible and toxic and harmful gas leakage. It can monitor the concentration of toxic and harmful gas leakage in real time and give an alarm in time, which can effectively prevent personal injury and dangerous accidents and avoid loss of personnel and economy.
 
On the basis of prevention, the detection and alarm control of combustible gas and toxic gas have been attached great importance in petrochemical production. How to correctly set up the field area alarm is an important issue in the detection and alarm design of combustible and toxic gases in petrochemical industry. The setting of regional alarms at the petrochemical plant site shall meet the requirements of various countries and regions.


 
Concept of site area alarm
 
The on-site alarm refers to the electronic alarm equipment installed on the site to send warning signals to the on-site or near the site through sound, light or rotation. The on-site alarm simultaneously sends out sound and light alarm signals.
 
The on-site alarm includes the following three types:
1) Site area alarm;
2) Toxic gas detector integrated sound and light alarm;
3) Combustible gas detector is an integrated sound and light alarm.
 
Selection of on-site alarm
 
The combustible gas and toxic gas detection and alarm system shall be divided into alarm zones according to the devices or units of the production facilities and storage and transportation facilities, and each alarm zone shall be equipped with field area alarms; The starting signal of the area alarm shall be the second level alarm set value signal. The number of area alarms should be such that the on-site personnel at any place in the area can sense the alarm.
The sound level of the alarm signal of the area alarm shall be higher than 110dba, and the total sound pressure at 1m away from the alarm shall not be higher than 120dba.
 
Toxic gas detector should be equipped with integrated sound and light alarm; The combustible gas detector can be equipped with integrated sound and light alarm. The start signal of the integrated sound and light alarm shall be the first level alarm set value signal.


 
Installation requirements for site area alarm
 
The site area alarm shall be reasonably installed based on comprehensive consideration of the following aspects:
 
▲ the field area alarm shall be installed in the alarm area where the detector is located.
▲ the alarm is a safety instrument. Generally, the installation height of the alarm in the site area shall be 2.2m higher than the ground of the site area, and it shall be located at the place easily perceived by the staff, so as to eliminate the hidden dangers and carry out daily maintenance by the maintenance personnel.
▲ the alarm shall be installed in a place without vibration, strong electromagnetic field interference and easy to repair.
▲ the alarm shall be far away from the strong electromagnetic field that has an impact on the operation of the instrument, such as high-power motor and transformer.
▲ when the alarm is installed outdoors, the protection grade shall be considered, such as weatherproof and sunscreen.
 
The detection and alarm of combustible gas and toxic gas is an important means to ensure the safety of petrochemical equipment and personnel. Reasonable selection and correct installation of site area alarm can effectively improve the detection and alarm level of combustible gas and toxic gas, and effectively ensure the safety of people's lives and property!