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[Chemical Knowledge]：Production and manufacturing method and process flow of compressed natural gas

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The manufacturing method
of compressed natural gas
compressed natural gas (Compressed Natural, referred to as CNG) is a clean energy, because of its high efficiency, environmental protection, safety and other characteristics, has been widely used in the field of chemical production of raw materials. This article will detail the manufacturing method of compressed natural gas.

1. natural gas pretreatment

In the compressed natural gas manufacturing process, the natural gas is first pretreated to remove moisture, impurities and acid gases. This step is to ensure the quality of natural gas and the safety of the compression process.

1. dehydration treatment: through the use of desiccant or cooling method, remove the moisture in natural gas.
2. Desulfurization treatment: by introducing absorbent, it reacts with the acid gas in natural gas to achieve the purpose of desulfurization.
3. Dust removal treatment: filter equipment is used to remove solid impurities in natural gas.

2. natural gas compression

pre-treated natural gas, which needs to be compressed to improve its energy density and convenience of storage and transportation. The compression process usually adopts a multi-stage compression method to reduce the temperature and pressure changes during the compression process.

1. Select the appropriate compressor: According to the flow and pressure requirements of natural gas, select the appropriate compressor type, such as reciprocating compressor, centrifugal compressor, etc.
2. Staged compression: natural gas is compressed step by step to reduce temperature and pressure fluctuations in the compression process, while improving compression efficiency.
3. Cooling and cooling: During the compression process, the compressor and natural gas are cooled by cooling water or refrigerant to control the temperature and avoid overheating of the equipment.

3. storage and transportation

compressed natural gas needs to be stored in special high-pressure gas storage tanks for subsequent use and transportation. In the process of storage and transportation, it is necessary to ensure the safety and reliability of the equipment.

1. Selection and installation of gas storage tank: According to the pressure and reserve requirements of compressed natural gas, select the appropriate type of gas storage tank and install it in compliance.
2. Safety accessories configuration: Safety accessories such as safety valves and pressure gauges are installed on the gas storage tank to ensure the safety of the equipment under overpressure or abnormal conditions.
3. Selection of transportation vehicles: Select special transportation vehicles that meet the requirements to ensure that no safety hazards will be caused to the surrounding environment during transportation.

4. quality inspection and recording

In order to ensure the quality and safety of compressed natural gas, it is necessary to conduct comprehensive quality inspection and recording of the production process.

1. Quality inspection: regularly test the key indicators such as composition, pressure and temperature of natural gas to ensure that the product quality meets the relevant standards.
2. Production records: record the parameters and data in the production process in detail, so as to trace and analyze the production process.

summary: The manufacturing method of

compressed natural gas includes the steps of natural gas pretreatment, compression, storage and transportation, quality inspection and recording. Through strict control of each link, high-quality, safe and reliable compressed natural gas can be produced to provide a stable supply of raw materials for chemical production. At the same time, production enterprises need to strengthen staff training and management, improve staff safety awareness and operational skills, and ensure the safe and smooth progress of the production process.

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