Minitype gas turbine generator wellhead shale gas supply device control system

Abstract

The invention discloses a minitype gas turbine generator wellhead shale gas supply device control system. A control protection system comprises a particle liquid drop control system, a temperature control system, a pressure control system, a liquid level control system, a water hydrocarbon dew point control system, a fine treatment control system and a system safety protection system which are independently arranged side by side, a working condition parameter signal acquisition system transmits acquired signals to a logic judgment command system, the logic judgment command system is correspondingly connected with a parameter setting system, the control protection system and a data storage remote transmission system, and a micro gas turbine power generation system is correspondingly connected with the parameter setting system, the control protection system and the data storage remote transmission system. The control system has the beneficial effects that stable control over the water hydrocarbon dew point is achieved, and normal and stable operation of the micro gas turbine is guaranteed; the pollution discharge is accurately controlled according to the fluctuation condition of theactual working condition, and the overall operation cost is reduced; and automatic liquid drainage under different working condition fluctuations is achieved, and the risks of tripping and blow-by arereduced.

Description

technical field [0001] The invention relates to the field of shale gas, in particular to a control system for a micro gas turbine generator wellhead shale gas supply device. Background technique [0002] The shale gas fracturing process requires multiple sets of high-power electrical equipment to work continuously, and the gas wells are mostly located in remote areas, and the surrounding power grid facilities are difficult to guarantee the power supply requirements of the electrical equipment required for the fracturing process. Conventional diesel generators need to be equipped with a large amount of diesel , the cost and freight are very high. If the shale gas gas turbine generator set is used, the fuel can be obtained locally, and the floor area is small, which has a great cost advantage. [0003] At present, the existing micro gas turbine gas supply control system is generally used in pipeline gas and liquefied natural gas, but cannot be applied to wellhead shale gas. T...

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Problems solved by technology

[0002] The shale gas fracturing process requires multiple sets of high-power electrical equipment to work continuously, and the gas wells are mostly located in remote areas, and the surrounding power grid facilities are difficult to guarantee the power supply requirements of the electrical equipment required for the fracturing process. Conventional diesel generators need to be equipped with a large amount of diesel , the cost and freight are very high, if the shale gas gas turbine generator set is used, the fuel can be obtained locally, the floor area is small, and it has a great cost advantage

[0003] At present, the existing micro gas turbine gas supply control system is generally used in pipeline gas and liquefied natural gas, but cannot be applied to wellhead shale gas. The dew point is different, and the shale gas water hydrocarbon dew point can only work normally when the micro gas turbine is in a safe range. A fixed dew point is directly determined according to the cooling temperature of the system, so it cannot adapt to the fluctuation range of shale gas working conditions and the requirements of normal and stable operation of gas turbines; at the same time, in the liquid level control of the existing system, it is difficult to adapt to the working conditions of gas coming from shale gas wells For example, the vast majority of systems use water delivery valves, which automatically drain when there is liquid, and automatically close after draining. Once the type of trap is selected, the reliability of automatic shut-off is related to the working parameters of the gas. However, the shale gas pressure and flow rate fluctuate widely, and there may be other large-scale changes in pressure, and the trap cannot be closed in time or reliably

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