1. Natural gas transportation field
Long distance pipeline:
Pressure requirement: It is necessary to increase the natural gas pressure to a higher level, generally requiring the outlet pressure of the booster compressor to reach about 10-20 MPa, in order to overcome the pressure loss caused by the resistance along the pipeline and the terrain height difference during long-distance transportation.
Flow requirements: With a large flow rate, it is necessary to be able to handle large-scale natural gas transportation, usually requiring a flow processing capacity of tens of thousands of cubic meters or even higher per hour to meet the demand for urban and industrial gas.
Reliability requirement: extremely high reliability, because once the long-distance pipeline is in operation, the compressor needs to work continuously and stably for a long time, usually requiring an annual operating time of thousands of hours, and a complete backup system and maintenance plan to reduce downtime.
Safety requirements: Due to the large amount and high pressure of natural gas being transported, strict safety performance requirements such as explosion prevention and leakage prevention are required. For example, the sealing system of the compressor must be highly reliable to prevent accidents such as explosions caused by natural gas leaks.
Urban gas distribution system:
Pressure requirement: According to the gas demand and pipeline situation in different areas of the city, the export pressure is generally around 0.1 and 0.4 MPa to ensure stable distribution of natural gas to various user ends.
Flow requirements: The flow rate depends on the scale of urban gas consumption, but is relatively small compared to long-distance pipelines. It should be able to flexibly adjust the flow rate to adapt to changes in gas consumption during different periods (such as peak and off peak periods).
Stability requirement: Able to operate stably under different environmental conditions and gas loads, ensuring stable gas supply pressure and flow, and avoiding damage to user equipment or gas supply interruption caused by pressure fluctuations.
Noise requirements: Considering the urban environment, the noise level of the compressor needs to meet the urban noise emission standards. Generally, the noise value is required to be controlled within a certain range, such as not exceeding 60-70 decibels during the day and not exceeding 50-60 decibels at night.
2. Natural gas refueling station field
CNG refueling station (compressed natural gas refueling station):
Pressure requirement: Natural gas needs to be compressed to a high pressure of 20-25MPa to meet the refueling needs of compressed natural gas vehicles, allowing the vehicle to store sufficient fuel in limited cylinder space.
Flow requirements: The flow requirements are moderate based on the scale of the gas station and the frequency of vehicle refueling. Generally, the refueling flow rate of a single gun is around a few cubic meters per minute, and it should be able to meet the refueling needs of multiple vehicles simultaneously.
Efficiency requirement: High compression efficiency, as the operating costs of gas stations are closely related to the energy consumption of compressors, efficient compressors can reduce operating costs. At the same time, it is necessary to be able to quickly complete the refueling process to reduce vehicle waiting time.
Cleanliness requirements: High cleanliness is required for compressed natural gas, as impurities may damage the gas system of the car. Therefore, the compressor needs to be equipped with an effective filtration system to ensure the purity of the natural gas entering the car cylinder.
LNG refueling station (liquefied natural gas refueling station):
Pressure requirement: During the process of transporting LNG to the refueling gun after gasification, the pressure is generally adjusted to around 1.16MPa according to the refueling requirements of the vehicle.
Flow requirements: Similar to CNG refueling stations, the flow should be able to meet the refueling needs of vehicles and take into account the characteristics of flow changes after LNG gasification to ensure stable gas supply.
Low temperature adaptability requirements: Due to the handling of LNG, compressors and their ancillary equipment need to be able to operate normally in low temperature environments to prevent equipment damage or performance degradation caused by low temperatures.
3. Industrial gas field
Chemical industry:
Pressure requirements: Due to the diversity of chemical production processes, the pressure requirements vary. For example, the production of synthetic ammonia may require increasing the natural gas pressure to a range of several MPa to several tens of MPa to meet the high temperature and high pressure chemical reaction conditions.
Flow requirements: The flow requirements vary greatly depending on the scale and reaction rate of chemical production. Large chemical enterprises require a large amount of natural gas, and compressors need to have a large flow processing capacity while also being able to accurately control flow to ensure the accuracy of chemical reactions.
Purity requirement: The purity requirement for natural gas is very high, as impurities may affect the progress of chemical reactions or cause catalyst poisoning. The compressor needs to be equipped with a high-precision purification system to ensure that the purity of natural gas entering the chemical production process meets the requirements.
Stability requirement: The chemical production process is generally continuous, and the compressor must operate stably to ensure the continuity and stability of the entire chemical production system. Once the compressor malfunctions, it may cause the entire chemical production process to be interrupted, resulting in huge losses.
Glass manufacturing industry:
Pressure requirement: In a glass melting furnace, the natural gas pressure needs to be adjusted to several hundred kPa to several MPa to provide sufficient heat to melt the glass raw materials. The specific pressure depends on the size of the furnace and the production process.
Flow requirements: The flow rate should be able to meet the heating needs of the glass melting furnace, and should be flexibly adjusted according to different stages of glass production (such as melting, forming, etc.) to ensure temperature stability during the glass manufacturing process.
Temperature requirement: Due to the high temperature of the glass manufacturing environment, the compressor needs to be able to operate normally in a high-temperature environment and its performance should not be affected by high temperatures to ensure a stable natural gas supply.
Metallurgical industry:
Pressure requirements: In equipment such as heating furnaces and heat treatment furnaces in the metallurgical industry, natural gas pressure is generally between several hundred kPa and several MPa according to process requirements to provide stable energy supply for metal heating, melting, and heat treatment processes.
Flow requirements: The flow should be adjusted according to the scale and production rhythm of metallurgical equipment to meet the heat demand during metal processing. For example, a large blast furnace hot blast stove requires a large supply of natural gas, and the flow rate of the compressor needs to match it.
Anti interference requirements: The metallurgical workshop environment is complex, with a large amount of dust, vibration, and electromagnetic interference factors present. Natural gas booster compressors need to have good anti-interference ability to prevent malfunctions or performance degradation caused by external factors.
4. Residential and commercial gas use areas
Residential gas usage:
Pressure requirement: Before natural gas enters residential households, the pressure is generally adjusted to around 23kPa for normal combustion of gas equipment such as stoves and water heaters. In some special situations (such as high-rise residential buildings or peak gas usage), a small booster compressor may be needed to increase the pressure appropriately.
Flow requirements: The gas flow rate of a single household is relatively small, but at the community or building level, it is necessary to consider the situation of multiple households using gas simultaneously. The flow rate of the booster compressor should be able to meet the gas demand during peak hours.
Safety requirements: Residential gas safety is crucial, and compressors must have complete safety protection devices, such as overvoltage protection, leak detection, and other functions, to ensure the safety of residential gas use.
Commercial gas:
Pressure requirement: For commercial places such as hotels, restaurants, and shopping malls, equipment that heavily uses natural gas (such as large stoves, central air conditioning, etc.) requires a stable natural gas pressure, generally around 25kPa, depending on the equipment requirements.
Traffic requirements: Commercial premises require a large amount of gas flow, especially during peak business hours. The flow rate of the compressor should be able to meet the maximum demand of all gas consuming equipment working simultaneously in commercial premises, and have a certain margin to cope with emergencies.
Stability requirement: The normal operation of commercial activities relies on a stable natural gas supply, so compressors must be able to operate stably to avoid the inability of commercial equipment to function properly due to pressure or flow fluctuations.
