Customization of High Pressure Natural Gas Relief Valve RTJ-50SQ Runfeng Large Flow Equipment
Natural gas is transferred from the trunk line under the jurisdiction of the Natural Gas Pipeline Company to the gas handling system of the gas turbine power plant for processing.
Through the analysis of the pressure drop of the natural gas processing system, when the pressure of the upstream natural gas pipeline network can meet the demand of the gas turbine under various working conditions, the natural gas pressure regulating station should be selected for the natural gas processing system.
Gas surge station is generally divided into several functions according to the different functions of each device.
Typical natural gas surge stations include emergency cut-off pry at entrance, crude separation pry, metering pry, filter pry, heating pry, pressure regulating pry, condensate collection device, release device and control system.
The voltage regulator is selected according to the user. There are three types of gas users, one is resident users, one is commercial users, and the other is industrial users. They have great differences in the choice of regulators. They can not share a regulator. The gas pressure of commercial users and industrial users is usually higher.
When choosing voltage regulator, residents usually choose single circuit voltage regulator. The range of inlet pressure is 0.2 MPa~0.4 MPa, and the range of outlet pressure is 1500 Pa~2000 Pa. When choosing voltage regulator in a design, besides choosing according to the size of flow, the location should also be considered. If the voltage regulator is located in the center of the users in the community, then according to the flow rate, how many large voltage regulators should be selected, and the opening degree of the voltage regulator should be in the range of 70%-90%.
This can not only make the regulator work in a good state, but also ensure the normal operation of downstream residents'pressure during peak gas use. If the location of the regulator has been fixed by the developer, it can only be installed in a corner of the community, when selecting the regulator, the pressure in front of the user stove at the far end of the regulator should be considered not less than 1000Pa, and the selection of the regulator should be more regular than the normal situation. In a residential area, the future development scale of the residential area should also be taken into account. There should be a certain surplus in the selection of voltage regulators. Otherwise, with the increase of residential users, the flow of voltage regulators will not be able to meet the peak gas consumption of downstream users.
When choosing voltage regulator, commercial users and industrial users generally choose double-circuit regulator. The import pressure range of commercial users is 0.2 MPa~0.4 MPa, the outlet pressure of regulator is 12 000 Pa~16 500 Pa, the import pressure range of industrial users is 0.2 MPa~0.4 MPa, and the outlet pressure of regulator is 20-50 KPa. They usually choose to be placed close to the user, which can reduce the pressure loss caused by distance.
The above is how to choose the regulator according to the different flow rate and users, but no matter what kind of regulator you choose, the gas pressure regulator cabinet must be equipped with filters, safety release valves, emergency shut-off valves, indicator pressure gauges and other related accessories, so that the regulator has the functions of emergency shut-off protection and automatic release protection during the process of pressure regulation. The pressure precision must be controlled in 5%-10%. Its filter device should be equipped with a differential pressure meter, and the filtering accuracy must be controlled in the range of 200 microns. In addition, commercial and commercial users install pressure regulators to compensate for flow errors caused by large pressure difference.
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