Gas driven heptafluoropropane filling equipment is mainly used to fill heptafluoropropane extinguishing agent (usually liquid) into the storage tank of the fire extinguishing system. Heptafluoropropane is an efficient and environmentally friendly gaseous extinguishing agent, which is usually stored in liquid state under high pressure and released through a gas driven device. During filling operation, the safety of equipment and operation process must be ensured to avoid leakage, high pressure or improper filling.
The working principle of gas driven heptafluoropropane filling equipment is based on the pressure difference between liquid and gas. Liquid heptafluoropropane is filled into the fire extinguishing agent storage tank through high-pressure gas. During the filling process, accurate operation is usually required according to different tank capacity, pressure of gas drive device and liquid saturation temperature of heptafluoropropane.
Heptafluoropropane fire extinguishing agent is usually stored in special large gas cylinders or tanks and maintained at high pressure (usually at 20 ℃, the pressure of heptafluoropropane is about 15~20 MPa). The filling equipment is equipped with a storage tank of high-pressure gas (such as nitrogen or air), which is used to push heptafluoropropane liquid into the storage tank through the pipeline system. During the filling process, the equipment needs to control the gas flow rate and filling pressure through the pressure reducing valve and flowmeter to ensure that heptafluoropropane can enter the storage tank safely and smoothly. The filling equipment is usually equipped with a temperature sensor or heating device to ensure the temperature stability during the filling process and prevent heptafluoropropane from affecting the filling effect due to overheating or supercooling.
Main components of gas drive heptafluoropropane filling equipment
Heptafluoropropane fire extinguishing agent storage tank: used to store liquid heptafluoropropane, which is usually made of high-strength metal material and designed to withstand high pressure.
Gas storage tank: such as nitrogen cylinder, which is used to provide the gas pressure required for filling. Gas pressure is generally controlled by pressure regulating valve.
Filling equipment: heptafluoropropane is introduced from the storage tank to the target storage tank through this equipment. The pipeline needs to have high-pressure resistance characteristics to prevent leakage.
Pressure reducing valve and flowmeter: used to control the pressure and flow of gas and heptafluoropropane to ensure smooth and stable filling process.
Temperature control system: it is used to adjust the temperature of heptafluoropropane and gas during the filling process to prevent the evaporation or liquid change of heptafluoropropane due to too high or too low temperature.
Filling port and valve: used to introduce heptafluoropropane from the filling equipment into the storage tank, and control the flow, opening and closing through the valve.
Operation process of gas drive heptafluoropropane filling equipment
Preparation:
Check the integrity of the equipment and confirm the normal operation of all pipelines, valves and temperature control devices.
Check whether the gas storage tank (such as nitrogen cylinder) is sufficient to ensure that the gas pressure is within the safe range.
Ensure that the liquid volume of heptafluoropropane tank is sufficient, and check whether the tank is well sealed.
Check and adjust filling equipment parameters:
Appropriate filling pressure and flow shall be set according to the design requirements and filling standards of heptafluoropropane storage tank. Generally, the filling pressure should be lower than the maximum pressure of the extinguishing agent storage tank.
Adjust the temperature control system according to the ambient temperature and the gasification characteristics of heptafluoropropane to ensure the liquid stability of the extinguishing agent.
Connecting devices:
Connect the filling pipe to the filling port of the target tank to ensure that there is no leakage at the connection.
Connect the gas drive source (such as nitrogen cylinder) to the filling equipment to ensure that there is no leakage between the gas pipeline and the filling system.
Turn on the filling system:
Open the valve of the gas storage tank, start the gas pressure regulation, gradually increase the gas pressure, and push heptafluoropropane into the target storage tank.
The filling flow is monitored by the flowmeter to ensure that the liquid heptafluoropropane enters the storage tank according to the set amount.
Monitor the filling process:
During the filling process, continuously monitor the pressure, temperature and filling flow in the storage tank to ensure the smooth filling process.
If the pressure is found to be too high or too low during filling, stop the operation immediately and check whether the system is abnormal.
Filling completed:
Once the filling is completed, close the valve of the gas storage tank and stop the filling.
Close all valves on the filling pipeline to ensure that liquid heptafluoropropane is fully filled and the equipment is sealed.
Check the pressure of the target tank to ensure it is within the safe range.