With the rapid development of modern industry, fire extinguishing system, the gas released from the increasing influence of the atmosphere caused by people's attention, the traditional Halon (HALON, 1211,130) release, the residual gas in the atmosphere for up to 87 ~ 110 years, a great impact on the environment. paper dyes In order to protect the ozone layer, according to the relevant provisions of international conventions in Montreal since the end of 1993 banning the production of HALON type of extinguishing agent, from the 2005 global ban on the use of such products. As HALON class alternative, the United States Great Lakes research and developed the company does not have a pure ozone-damaging compounds FM200 gas extinguishing agent, it is not conductive, released to the surrounding environment without damage, no damage to the equipment and the personal in shorter atmospheric residue (31 ~ 42 years), toxicity, and low relative direct dyes concentration of fire.
Daya Bay Nuclear Power Station in 1995, condensate polishing processing station control room equipped with two sets of FM200 fire suppression system, has been run for 5 years. The FM200 fire suppression system is stable, safe, reliable, fast gas release, on human toxicity is very small site run by the welcoming staff. The following agents on FM200 fire extinguishing system properties,HFC 227ea monitor operation, control theory and so on are introduced.
Storage tank fire extinguishing agent
Produced by the British Ki dde manufactured GX20 red steel structure fire extinguishing agent storage tanks, mainly through the valve to control the FM200 fire extinguishing agent, according to the size of storage tank volume is different from the weight of fire extinguishing agent inflatable ranging from 6 ~ 258Kg. Normally the tank of the fire extinguishing agent through the nitrogen pressure to 2500 kPa, to ensure that the fire occurred, 10s in the tank of the fire extinguishing agent can be released quickly and efficiently completed.
Control Valve
Control valve copper valve, spring-type control valve, releasing gas storage tanks is a key component.Basic dyes When manually or automatically (by 24VDC signal) operating at the top of the valve actuator, the valve of the heart valve can release the gas.
Low monitor switch
When the storage tank's design capacity of extinguishing agent capacity of less than 95%, the low pressure monitoring switch into a normally open normally closed contacts, then the control panel on the "low pressure" indicator light to alert operating personnel need to fill fire extinguishers.
High-voltage release switch
Extinguishing agent in the release process, triggering the export pipeline installation switches, normally closed contacts of the switch into a normally open, then control panel on the "gas release"FM 200 indicator light to notify operating personnel in the fire extinguishing agent storage tank has been released required to re-fill.
Pressure Indicator
Installed in the valve body pressure indicator can be directly reflects the pressure in the tank and running.
Safety pressure relief ring
When the tank's inflation pressure is higher than the design limit, the safety pressure relief through the automatic pressure relief to the ring within the provisions.
Nozzle
Nozzles installed in the fire area has been designed in accordance with good angles (180 º or 360 º) and the concentration of fire extinguishing agent in the 10s will be even faster jet finished.
FM200 fire extinguishing agent
As a safe and reliable, but not damage the ozone layer, has excellent explosion-proof properties of FM200 fire extinguishing agent, the volume of fire Nongdu 5.8%, this data and get the test through the human body have a negative impact on the human body volume concentration of the critical value compared to 9% lower.
Principles of Operation Control
Like other control systems, FM200 fire suppression system is the system through the control panel for online monitoring, control and operation.
Under normal circumstances, the entire system is in automatic mode, the gas storage tank pressure line monitoring,textile dyes when smoke and / or optical detectors sense when measured anomalies, such as smoke concentration or ambient temperature exceeds the limit value, sound, light alarm occurs, after delay by 5 ~ 8s, if the anomaly has not been restored, the control panel issued a "gas release" command, in the storage tank on the implementation of agency action, FM200 fire extinguishing agent through the pipe and spray nozzle to the fire area.
Emergency, if the control panel or the storage tank on the failure of the automatic implementation of the agency, are available through the manual control panel button or the manual handle can achieve the spraying extinguishing agent.