lng to cng skid High-Pressure Vaporization & Reheating Skid
Product Introduction
The High-Pressure Vaporization & Reheating Skid(lng to cng reheater) is a fully integrated, skid-mounted system that combines high-pressure gas vaporization, precise reheating, and intelligent control.
It is primarily used in LNG and CNG fueling stations to address the technical challenges associated with high-pressure, low-temperature natural gas during transportation and pressure regulation.
The core working principle
Liquid natural gas (LNG) is vaporized and pressurized through a high-pressure vaporizer, or high-pressure compressed natural gas (CNG) is processed directly. The low-temperature gas is then reheated through a reheating system such as an electric water bath heater, raising the gas temperature to a safe level (typically ≥ 5°C). This effectively prevents ice formation caused by the Joule–Thomson effect during downstream pressure reduction, ensuring the safe and stable operation of pipelines and equipment.
|
Item |
Single Vaporizer |
Dual Vaporizers |
|
Inlet Medium |
L-CNG |
L-CNG |
|
Outlet Medium |
CNG |
CNG |
|
Design Pressure |
27.5 MPa |
27.5 MPa |
|
Maximum Working Pressure |
25.0 MPa |
25.0 MPa |
|
Flow Capacity |
1000 / 1500 Nm³/h |
1000 / 1500 Nm³/h |
|
Design Temperature |
-196 °C |
-196 °C |
|
Operating Temperature |
-162 °C |
-162 °C |
|
Outlet Gas Temperature |
10 °C below ambient temperature |
10 °C below ambient temperature |
|
Continuous Operating Time |
≤ 8 h |
≤ 8 h |
Key Advantages
1. High Integration & Easy Installation
All modules are factory-assembled and fully tested, significantly reducing on-site construction time and commissioning work while minimizing potential leakage points.
2. Safety & Reliability
Equipped with multiple safety features-such as EAG-assisted heating, overpressure protection, and automated control systems-the skid effectively prevents risks including ice blockage, material embrittlement, and unstable operation under high-pressure, low-temperature conditions.
3. High Efficiency & Energy Optimization
Through sequential control logic and precise gas reheating, the system optimizes energy consumption and improves overall operating efficiency.
Typical Applications
L-CNG Fueling Stations
Convert LNG into high-pressure CNG for vehicle refueling.
CNG Pressure Reduction Stations (City Gate Stations)
Reheat high-pressure gas from CNG tube trailers before pressure reduction to pipeline pressure.
Industrial Direct Gas Supply
Provide stable, high-pressure natural gas for industrial users.
Emergency & Peak-Shaving Facilities
Serve as a modular backup or peak-regulation gas source.
Engineering Notes
The High-Pressure Vaporization & Reheating Skid is a key system for the safe, efficient conversion and transmission of natural gas.
System configuration should be selected based on the gas source (LNG/CNG), design pressure (e.g. 25 MPa / 27.5 MPa), design temperature (down to -196°C), required flow rate (Nm³/h), and target outlet gas temperature.
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