• Hydraulic Piston CNG Daughter Station
  • Hydraulic Piston CNG Daughter Station
  • Hydraulic Piston CNG Daughter Station
  • Hydraulic Piston CNG Daughter Station
  • Hydraulic Piston CNG Daughter Station
  • Hydraulic Piston CNG Daughter Station

Hydraulic Piston CNG Daughter Station

In Stock

Description

The working principle of hydraulic piston CNG daughter station is as follows:
The key equipment - hydraulic piston NG compressor uses the high-pressure hydraulic oil from hydraulic power system to drive the piston of the main compression cylinder to move up and down inside the cylinder, so as to pressurize the natural gas filled into the compression cylinder, and then the natural gas will be discharged to group gas storage cylinder after being cooled by the NG cooler. Finally the CNG vehicle is fueled via CNG dispenser to realize metering and trade calculation.

Characteristics
Uniquely developed process control design in the industry to ensure the discharging efficiency of the feeding gas with low pressure gas and the min. suction pressure can reach 290psi .
Unique hint function for system maintenance, which will provide alarm based on the system maintenance requirement to the maintenance personnel to carry out relative operation and feed back accordingly.
Stronger system universality as the system can use both the normal CNG trailer and specified hydraulic horizontal CNG trailer.
Multi-function module with skid mounted design integrates functions of gas discharging pole, group gas storage cylinder, gas filling measurement on the key equipment - hydraulic piston NG compressing skids.
Unique hydraulic safety protection system, for which differential pressure sensor is set on the hydraulic oil tank to ensure the safe running of hydraulic system efficiently.
System safety monitoring function: video monitoring system is optional for the key equipment - hydraulic piston NG compressors, and the monitoring system is equipped with dynamic tracing function to ensure 360 degree safety monitoring.
Explosion-proof design for the whole unit with high safety and reliability.
Strong environment adaptability: The unit is equipped with space heating system so as to ensure stable running in cold environment.

Product Model and Technical Parameters
(Hydraulic Piston CNG Daughter Station)

Line Configuration

Standard

Standard

Optional

Model (Stationary)

YSJZ1200-20/250

YSJZ2000-20/250

YSJZ1000-20/250Y

Compression Stage

Two

Two

Two

Cylinder Allocation

Vertical

Vertical

Vertical

Inlet Gas Pressure (Psig)

290~2,900

290~2,900

290~2,900

Inlet Gas Temperature (°F)

-40~122

-40~122

-40~122

Exhaust Pressure(Psig)

3,625

3,625

3,625

Final Exhaust Temperature (°F)

≤122

≤122

≤122

Average Displacement (MSCFH)

42.8

71.4

35.7

Power Consumption (kW.h/SCM)

0.035

0.03

0.03

Leakage (%)

0.03

0.03

0.03

Noise (dB (A))

≤75

≤75

≤75

Cooling Type

Air cooled

Air cooled

Air cooled

Main Motor Power (kW)

22x2

45+45

22x2

NG Cooling Motor Power (kW)

2.2

4.5

2.2

Hydraulic Oil Cooling Motor Power

1.5

2.2

1.5

Control Mode

PLC unattended

PLC unattended

PLC unattended

Instrument Air Supply

Fuel Gas DepressurizedSupply/External Air Compressor Supply

Fuel Gas Depressurized Supply/External Air Compressor Supply

Fuel Gas Depressurized Supply

Life Span of Consumables (h)

3,500

3,500

3,500

Line General Power(kW)

<51

<100

<51

Oil Tank Capacity (bal)

176

264

176

External Dimension (ft) (LxWxH)

12,467×7,999×10,170

14,764×7,999×10,499

24,606×7,999×10,170

Transportation Dimension (ft) (LxWxH)

12,467×7,999×8,858

14,764×7,999×8,858

24,606×7,999×8,858

Weight (lb)

16,535

19,842

20,944~26,455

Optional: It could be combined with standard configuration freely.
1. Integration of 440bal group storage gas cylinder
2. Integration of CNG dispenser function (4 dispensers)
3. Integration of gas discharge pole function
4. Integration of explosion-proof PLC

Comparison on Three Types of
Domestic Daughter Station

Project Description Compared

Hydraulic Horizontal CNG Daughter Station

Hydraulic Piston CNG Daughter Station

Mechanical CNG Daughter Station

Compression Cylinder Structure

-

Two-Stage Four-Cylinder Symmetric Allocation

Two-Stage Four-Cylinder Symmetric Allocation

Driving

Hydraulic Driven

Hydraulic driven

Motor Driven Or Pulley Driven

Lubrication

Not Necessary

Not necessary

Lubrication With Oil Or Low-Oil

Oil-Gas Mixture

Direct Contact and Heavily Mixed

Lightly mixed

Mixed

Compression Efficiency

-

High

Medium

Linear Speed of Moving Components

Low

Low

High

Clearance Affection

-

Little

Great

Displacement Change with Inlet Pressure

-

Great

Big

Noise(with sound-proof shield)

<75 dB (A)

<75 dB (A)

<75 dB (A)

Pressure Adaptability of Different Entry

Strong

Strong

Weak

Daily NG Consumption (leakage rate)

<0.05%

<0.02%

<1%

Gas Discharging Rate

95%

90%

85%

Whether the total power is adjustable or not (based on the displacement)

(0.07 MMSCF/h)

Displacement Adjustable

Single or Dual-Motor Running Based on The Displacement

Not Adjustable

Power (take averaged 1,000Nm3/h for example)

Motor Power kW

37

22×2

75/90

Operating Cost

1.236 kW.h/SCM

1.236 kW.h/SCM

2.260 kW.h/SCM

Seal Life Span

No Seal Used

Vertical Without Eccentric Wear, Long Life Span (3,500h)

With High Linear Speed and Easy-to-Wear Seal

Main Consumables Quantity and kinds for Daily Maintenance

Specified Hydraulic Oil (Imported Product With Higher Cost)

Very few Consumables

Lots Of Consumables and Mostly Self-Made

Maintainability

-

Simple

-

Process Safety

★★★

★★★★★

★★★★

Hydraulic Piston CNG Daughter Station VS Hydraulic Horizontal CNG Daughter Station
Hydraulic Piston CNG Daughter Station VS Mechanical CNG Daughter Station
Having strong advantages in oil-gas mixing, NG consumption, maintainability, maintenance cost and process safety, the other indicators are in the same level.
Having absolute advantages in oil-gas mixing, compression efficiency, clearance affection, NG consumption rate, gas-discharging rate, seal life span, maintainability and maintenance cost, the other indicators also has certain strength.
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