Qingdao Lenado Intelligent Equipment Co., Ltd. is one of the most reliable manufacturers and suppliers of cng mother station engineering design in China. With a professional production team, we are able to meet the needs of the majority of our customers. Welcome to wholesale bulk customized cng mother station engineering design from our factory.
Product Overview
Custom Turnkey CNG Refueling Mother Station Complete Engineering Design Solution
A CNG refueling mother station is the core hub of the entire CNG supply network. We extract raw natural gas from urban medium/high-pressure natural gas pipelines, conduct full purification, deep dehydration, 4-stage high-pressure compression up to 25MPa, then deliver gas to two filling terminals: CNG tube bundle trailers via filling columns, and local CNG vehicles via refueling dispensers.
As the critical transfer node connecting upstream natural gas pipeline grids and downstream transport trucks & end-user vehicles, our CNG mother station supports flexible design capacity from 50,000 to 300,000 Nm³ per day, matching all small, medium and large-scale gas supply demands.
Compulsory Compliance Standards
All our CNG mother station engineering design strictly follows international & national industry codes to guarantee safety and product quality:
GB 50156 Code for Design and Construction of Motor Vehicle Filling and Gas Filling Stations
GB 18047 Compressed Natural Gas for Vehicles
SY/T 6458 Code for Design of Natural Gas Compressor Stations
Core Design Operating Parameters
| Parameter Item | Standard Design Value |
|---|---|
| Station Inlet Gas Pressure | 0.4–1.6 MPa (ambient temperature) |
| Compressor Outlet Pressure | 25 MPa |
| Final Filling Working Pressure | 20–25 MPa |
| Dehydrated Atmospheric Water Dew Point | ≤ -60℃ |
| Design Ambient Temperature Range | -20℃ ~ 50℃ |
Raw Gas Source & Strict Gas Quality Requirements
We adopt urban sub-high/high-pressure pipeline natural gas as the primary stable gas source, which features long-term steady gas supply, constant inlet pressure and continuous large-flow delivery capacity. We set rigid gas composition thresholds to protect all station equipment and guarantee CNG product quality:
1.Methane (CH₄) Content ≥ 95%: Maintain sufficient calorific value, improve combustion efficiency and lower operation cost
2.Hydrogen Sulfide (H₂S) ≤ 20 mg/m³: Restrain acid gas corrosion to compressors, heat exchangers and pipelines, extend equipment service life
3.Atmospheric Dew Point ≤ -60℃: Eliminate high-pressure low-temperature hydrate blockage of pipes and valves, ensure uninterrupted production
Complete Core Process Flow
Main Process Route: Raw Gas Purification → Deep Dehydration → High-Pressure Compression → Gas Storage & Dual-Mode Filling
Step 1: Front-End Raw Gas Pretreatment (0.4–1.6MPa Inlet)
1. Raw natural gas enters the station from external pipeline
2. Precision filtration unit removes solid impurities
3. Flow meter for accurate gas metering
4. Pressure regulating valve group stabilizes inlet gas pressure
5. Safety odorization treatment for leakage warning
6. Double-tower molecular sieve pre-dehydration system
7. Buffer tank for pressure fluctuation buffering
Step 2: Four-Stage High-Pressure Compression System
4-stage reciprocating compressor boosts natural gas pressure to rated 25MPa, fully meeting high-pressure storage and vehicle/trailer filling technical standards. We adopt standby unit configuration (1 running +1 standby / 2 running +1 standby) to achieve 24/7 non-stop station operation.
Step 3: Dual Output Filling Terminals
1. CNG Tube Trailer Filling Line: High-pressure filling column → 20–25MPa CNG tube bundle trailer
2. CNG Vehicle Refueling Line: Sequential control panel → underground high-pressure gas storage well → refueling dispenser → end-user CNG vehicles
Core Supporting Equipment List
We supply full-set matching equipment for integrated CNG mother station turnkey projects, all configurable with domestic or imported brands:
1：4-Stage Reciprocating Compressor
25MPa outlet pressure, flexible standby configuration for continuous production, frequency conversion energy-saving design optional
2：Molecular Sieve Double-Tower Dehydration Unit
Automatic tower switching for uninterrupted deep dehydration, atmospheric dew point stably ≤ -60℃
3：High-Pressure Gas Storage Facilities
Priority: Underground high-pressure gas storage wells (small footprint, higher safety); Alternative: Above-ground high-pressure cylinder groups
4：CNG Tube Trailer Filling Columns
Standard 2–4 sets for fast mass filling of CNG transport tankers
5：CNG Vehicle Refueling Dispensers
2–4 dispensers with high-precision metering, fast refueling function for passenger & commercial CNG vehicles
6：PLC + SCADA Automatic Control System
Centralized remote monitoring, full-process auto control and interlock safety protection for all station equipment
Standard General Station Layout Design
Total station land area: 3,000–5,000 ㎡, scientific functional zoning with fire safety as top priority, smooth vehicle circulation and explosion-proof isolation design:
1,Gas Intake & Pressure Regulation Metering Zone: External pipeline access, initial gas filtration & metering
2,Core Process Equipment Zone: Dehydration units, compressor house, buffer tanks
3,High-Pressure Gas Storage Zone: Underground storage wells / cylinder groups for station pressure balance
4,Dual Filling Zone: Separated tanker filling island + vehicle refueling island
5,Auxiliary Supporting Zone: Central control room, power distribution room, fire water tank, safe venting area
Fire & Layout Safety Standards
Explosion-risk process & filling zones fully isolated from office and living buildings
Tanker passage width ≥ 12m, vehicle turning radius ≥ 18m
Closed circular fire escape passage around the whole station
All buildings strictly comply with national fire separation distance specifications
Automatic Control & Multi-Layer Safety Protection System
Auto Control Core Architecture
1. SCADA System: Real-time remote monitoring of full-station pressure, temperature, flow data and equipment running status
2. PLC Main Controller: Station intelligent operation brain, executes complex logic calculation and interlock protection programs
Full-Range Safety Protection Functions
1. Combustible Gas Detection Early Warning: Gas sensors deployed in all high-risk areas, automatic sound-light alarm once leakage detected
2. Automatic Over-Limit Interlock Shutdown: Auto stop system when pressure/temperature exceeds safety threshold, avoid equipment breakdown and secondary accidents
3. ESD Emergency Cutoff System: On-site multiple emergency stop buttons & fast cut-off valves, one-click full gas source cutoff for sudden hazards
4. Integrated Fire Fighting System: Combined dry powder fire extinguishing, fixed fire water supply and high-altitude flare vent system to build 3D emergency response mechanism
Main Station Building & Structure Design
1,Compressor Room: Full explosion-proof construction, enhanced ventilation & heat dissipation, built-in sound insulation for noise reduction
2,Dehydration Unit Shed: Open/semi-open steel frame structure, convenient for daily equipment maintenance
3,Gas Storage Zone: Custom underground wells or ground cylinder groups based on project terrain
4,Filling Islands: Independent separated zones with dedicated filling machines/columns for trailers and vehicles
5,Fire Water Tank & Pump House: Central fire water storage and supply for emergency fire response
6,Safe Venting Area: Safe release & incineration of overpressure natural gas during maintenance or emergencies
7,Central Control & Power Distribution Room: Centralized layout of SCADA auto-control and power transformation equipment, the "brain & power center" of the whole station
Environmental Protection & Energy Saving Design
Environmental Protection Measures
1. Noise Control: Compressor room equipped with professional sound insulation materials and silencer devices, factory boundary daytime noise ≤60dB
2. Waste Gas Treatment: No waste gas emission under normal production; tiny vented gas during maintenance will be burned via high-altitude flare to eliminate environmental pollution
3. Solid Waste Disposal: Waste molecular sieves and domestic garbage collected and treated in accordance with environmental regulations
Energy Saving Technology Configuration
1. Variable Frequency Compressor Control: Auto adjust motor speed and power output according to real-time gas load, cut down idle power consumption greatly
2. Optional Compressor Waste Heat Recovery System: Recycle heat generated during compression to produce hot water/steam for production and domestic heating, raise overall energy utilization efficiency
Why Choose Our CNG Refueling Mother Station Turnkey Solution
1,Full one-stop service: Scheme design → equipment manufacturing → civil construction → installation & commissioning → after-sales maintenance
2,Mature pre-dehydration core technology: Achieve deep water removal, effectively protect compressors and guarantee CNG product quality
3,Strict full-process safety interlock design, multi-layer fire & leakage protection
4,Customizable capacity from 50,000–300,000 Nm³/day to match your gas business scale
5,Energy-saving frequency conversion and waste heat recovery options to lower long-term operation costs
6,All design & construction compliant with GB & SY/T international industry standards
7,Remote PLC+SCADA intelligent monitoring, reduce on-site labor management cost
FAQ
Q1: What is the core process flow of a CNG refueling mother station?
A: The complete process is raw gas purification → molecular sieve deep dehydration → 4-stage high-pressure compression to 25MPa → high-pressure gas storage, then dual filling for CNG tube trailers and CNG vehicles. The molecular sieve dehydration unit can lower atmospheric dew point to ≤-60℃ to prevent hydrate blockage.
Q2: What standard pressure does your CNG mother station compressor output?
A: Our standard 4-stage reciprocating compressor reaches 25MPa outlet pressure, with filling working pressure controlled between 20–25MPa, complying with GB 18047 vehicle CNG standards.
Q3: Can you provide full turnkey CNG mother station engineering service?
A: Yes, we offer full turnkey solutions including process design, equipment supply, civil layout construction, automatic control system installation, on-site commissioning and long-term after-sales service. The design capacity ranges 50,000 to 300,000 Nm³/day for selection.
Q4: How does your CNG mother station realize safety protection against gas leakage?
A: We deploy full-set safety systems: combustible gas detection alarm, auto interlock shutdown, ESD emergency gas cutoff valve, integrated dry powder fire fighting and high-altitude flare venting system for multi-dimensional risk prevention.
Q5: What energy-saving functions are equipped on your CNG refueling mother station?
A: Core compressors adopt variable frequency control to save power consumption; optional waste heat recovery system recycles compression heat for heating use, greatly improving overall energy efficiency and reducing daily operation electricity cost.
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