How can two air compressors be connected in parallel to use air storage tanks together?

Technical Scheme and Implementation Points of Two Air Compressors Using Air Storage Tank in Parallel

in the industrial field, the parallel air supply of multiple air compressors can significantly improve the air supply capacity and stability of the system. The following from the technical principles, implementation steps and precautions three aspects, the analysis of two air compressors in parallel using the core of the tank scheme:

technical principle of 1. parallel gas supply

1. SUPPLY SUPPLY CAPABILITY
   through the pipeline connection, the exhaust volume of the two air compressors can be merged into the same gas storage tank to double the gas supply capacity and meet the large-scale gas demand.

2. pressure cooperative control
   the parallel system shall be equipped with a pressure sensor and an intelligent control system to ensure that the two devices respond to pressure changes synchronously and to avoid the impact of system stability due to overload or frequent start and stop of a single device.

3. Redundant backup design
   if one equipment fails, the other can continue to supply gas to ensure that key processes are not interrupted and improve system reliability.

Steps to 2. Parallel Air Supply

1. equipment selection and matching
   • pressure consistency: The rated discharge pressures of the two air compressors shall be consistent to avoid air flow disturbance caused by pressure difference.
   • Flow coordination: Give priority to models with similar displacement, or dynamically distribute the load through the control system.
2. Piping System Design
   • main pipe diameter: Calculate the cross-sectional area of the pipeline according to the total exhaust volume to ensure that the airflow resistance is lower than the allowable value of the equipment.
   • Connection mode"Parallel confluence" design is adopted, and the air outlets of the two equipment are merged into the air inlet of the air storage tank through equal diameter pipes to avoid pressure loss caused by "series connection.
   • Valve configuration: Globe valve shall be installed at the air outlet of each equipment to facilitate independent maintenance or isolation of faulty equipment.
3. control system integration
   • pressure sensor: A high-precision pressure sensor is installed on the top of the gas storage tank to monitor pressure changes in real time.
   • frequency conversion collaboration: If the equipment is a frequency conversion model, a master-slave control module shall be configured to realize dynamic speed matching.
   • Fault protection: When a single device fails, the system automatically switches to another device and triggers an alarm.

3. Key Considerations

1. airflow Uniform Design
   • pipe Layout: Avoid excessive pipe elbows or abrupt cross-sectional changes to reduce airflow disturbance and pressure loss.
   • Gas tank volume: The volume of the air storage tank needs to match the total exhaust volume. It is generally recommended to be 1/3 to 1/2 of the total exhaust volume to buffer airflow fluctuations.
2. Condensate water discharge
   • automatic drain valve automatic drain valves shall be installed at the air outlet of each equipment and at the bottom of the gas storage tank to avoid pipeline corrosion caused by the accumulation of condensed water.
   • Drainage cycle: According to the environmental humidity and air consumption set drainage frequency, generally every 2-4 hours discharge.
3. Maintenance coordination
   • filter Element Replacement: The air filter and oil separator of the two devices need to be replaced synchronously to avoid abnormal system pressure caused by blockage of the filter element of a single device.
   • Oil Management: If it is an oil-lubricated model, use the same brand and model of lubricating oil to avoid failure caused by mixing oil products.

4. common problems and solutions

1. large pressure fluctuation
   • reason: Uneven pipe resistance or control system response lag.
   • Solve: Optimize the pipeline layout and shorten the response time of the control loop.
2. Overload of single equipment
   • reason: Uneven load distribution or equipment performance differences.
   • Solve: Configure the load balancing module, or dynamically adjust the speed through the inverter.
3. Air tank temperature is too high
   • reason: The airflow speed is too fast or the ambient temperature is too high.
   • Solve: Increase the cross-sectional area of the pipeline, or add a gas storage tank cooling device.

Conclusion

two air compressors use air storage tanks in parallel, which need to take equipment matching, pipeline design and control system as the core, taking into account the uniform distribution of air flow, condensate discharge and maintenance coordination. It is recommended to optimize system parameters through professional calculations and field tests to ensure gas supply stability and energy efficiency performance. For large-scale gas use scenarios, the use of intelligent control systems can further improve system redundancy and economy.