This gas unloading compressor is specifically designed for gas loading and unloading operations involving tank trucks and gas cylinder groups. It employs a highly efficient and reliable structure, enabling rapid gas pressurization, unloading, and residual liquid recovery.
The equipment operates stably and is easy to use, featuring comprehensive safety protection and sealing performance, and is suitable for various industrial gas conditions.
It is widely used in chemical, energy, and gas filling stations to improve unloading efficiency and ensure safe and reliable operations.
The unloading capacity is calculated based on the following working conditions: inlet pressure 1.0 MPa, discharge pressure 1.6 MPa, inlet temperature 40°C, and liquid density of liquefied gas 582.5 kg/m³. The unloading capacity will change accordingly if the working conditions vary; the data is for reference only.
Main technical parameters of LPG compressors, C4 loading compressors, and unloading compressors
No.
Model
Motor Power(KW)
Overall Dimensions(L×W×H)mm
Loading /unloading capacity(t/h)
1
ZW-0.25/10-16
4
~1000×710×865
~5.5
2
ZW-0.4/10-16
5.5
~1000×710×865
~9
3
ZW-0.5/10-16
7.5
~1000x710x865
~11
4
ZW-0.6/10-16
7.5
~1000×710×865
~13
5
ZW-0.8/10-16
11
~1000x710x865
~17.5
6
ZW-1.1/10-16
15
~1000x710x865
~24
7
ZW-1.35/10-16
18.5
~1000x710x865
~30
8
ZW-1.6/10-16
22
~1400x900x1180
~35
9
ZW-2.0/10-16
30
~1400x900x1180
~45
10
ZW-2.5/10-16
37
~1400x900x1180
~55
11
ZW-3.0/10-16
45
~1400x900x1180
~65
12
ZW-4.0/10-16
55
~1400×900×1180
~85
13
VW-5.0/10-16
75
~2400×1800×1550
~110
14
VW-6.0/10-16
90
~2600×1800×1550
~130
15
VW-8.0/10-16
110
~2800×1800×1550
~174
16
ZG-0.75/10-15
11
~1450×800×1300
~16.3
17
2DG-1.5/10-16
22
~1860x1680x930
~32.6
Example of Liquid Ammonia Unloading Compressor Selection Calculation
Compressor inlet and outlet pressure selection
Temperature(℃)
Atm(kg/cm²)
Temperature(℃)
Atm(kg/cm²)
20
8.4585
30
11.512
22
9.0125
32
12.212
24
9.594
34
12.943
26
10.204
36
13.708
28
10.843
The saturated vapor pressure of liquid nitrogen at 20-36℃.
At higher temperatures, the saturated vapor pressure of liquid ammonia is higher, so a model with an inlet pressure of 16-24 (exhaust pressure) is selected to meet the requirements of the high-temperature operating environment.
Compressor displacement calculation
The specific flow rate calculation is quite complex and needs to be determined based on calculation formulas and experience. This section only introduces a simple calculation method: taking the unloading of a 15-ton tanker truck in one hour as an example.
Calculate tank truck volume
Based on the provided operating conditions, first determine the total volumetric flow rate required to unload 15 tons of liquid ammonia from the tanker truck in one hour.
The specific gravity of liquid ammonia is 0.618, therefore the volume of 15 tons of liquid ammonia is: 15 ÷ 0.618 = 24.272 m³. Since the tanker truck cannot be filled completely, it is generally filled to about 80% of its capacity. Therefore, the tanker truck volume is 24.272 ÷ 0.8 = 30.34 m³. Thus, the total volume of the tanker truck is 30 m³.
Because the compressor must first establish a pressure differential before unloading liquid ammonia from the tanker truck to the storage tank, and this typically takes 15 minutes, the actual unloading time is only 45 minutes. Therefore, the required discharge volume is 30 ÷ 45 = 0.66667 m³/min. After the gas is pressurized from 1.6 MPa to 2.4 MPa by the compressor, its volume will decrease to approximately 0.66667% of its original volume (16 ÷ 24). Therefore, the compressor discharge volume is 0.66667 ÷ 0.66667 = 1 m³/min.
FAQ
LPG Compressor Application Scenarios：
LPG tank truck unloading & loading at gas stations, depots and terminals.
Vapor recovery & gas-liquid phase transfer in LPG storage tanks.
Pressurization and pipeline transportation of liquefied petroleum gas.
Refinery & petrochemical plant: LPG boosting, tail gas recovery and process gas feeding.
Gas cylinder filling and pressurized bottling for civil & industrial LPG.
Flare gas recovery, reducing waste and improving energy utilization.
Small-scale LPG vaporization station pressure boosting for industrial fuel supply.
