5 March 2022

The gas treatment equipment will provide the specified design parameters of fuel for the Siemens SGT-800 turbines.



At the Novopolotsk CHPP, the 100 MW gas turbine power plant (GTPP) based on two Siemens SGT-800 turbines is being created. It is one of four peak-standby energy source (PSES) under construction today for the unified power grid of the Republic of Belarus.

Being in the mode of continued readiness to launch, the new facility will maintain, if necessary, the balance of generation and consumption of electricity. The equipment of the GTPP is characterized by high maneuverability – it will take less than 15 minutes to responsively start it and fill the power deficit in the power grid.

Under a contract with Siemens Energy, the Russian Company ENERGAS supplied gas treatment and fuel supply equipment to Novopolotsk PSES – a gas receiving station (GRS) and an end system of filtration (SF). This equipment will ensure the design parameters of the fuel before its feeding into turbines. GRS and SF were supplied in maximum factory readiness (after preliminary workshop tests) that significantly reduces the duration of the construction and mounting works and pre-start activities.

The gas receiving station, manufactured by ENERGAS under a special project, is a process unit, the main purpose of which is flow measuring and preliminary filtration of gas. The capacity of the station is 29,210 m3 / h – similar to the rated fuel consumption of GTPP.



GRS is equipped with its own separation system with coalescing filters-scrubbers. The degree of gas purification is 99.9% for impurities over 10 microns in size. It is possible to quickly replace the filter-elements.

To measure the volume of fuel entering the gas-turbine power units, the GRS is equipped with a two-line commercial gas-metering unit with a relative error of no more than 1.5%. Data from him is transmitted via communication channels to the upper level of the automated process control systems.

The process unit is additionally equipped with fuel quality control subassembly located on the outlet pipeline and equipped with various measuring and analytical equipment.

The gas receiving station is placed in a separate all-weather module (block-box) and is equipped with necessary engineering systems, including life support systems (heating, ventilation and lighting) and safety (fire detection, gas detection, alarm and fire fighting). GRS is fully automated; control will be carried out from the dispatch room of the power facility.



ENERGAS end system of filtration is intended to ultrafine purification of gas fuel at the inlet to the shut-off valve block of SGT-800 turbines. SF consists of four filters of vertical cartridge type with a throughput of 14,890 Nm3 / h each.

Filtration efficiency is 99.9% for particles larger than 0.01 microns. As a result, the residual content of impurities in purified gas does not exceed 0.001 ppmw (mg / kg). Coalescing filters are equipped with pressure differential sensors that signal the contamination of replaceable elements. The signals go directly to the upper level of the APCS.



Three more Belarusian PSESs are being built at the sites of existing thermal power plants of the RUE Minskenergo, Brestenergo and Vitebskenergo. At the Minsk CHPP-5 there is being created GTPP with a capacity of 300 MW consisting of six SGT-800 turbines, at the Berezovskaya SDPP – GTPP-250MW (of five turbines), at the Lukomlskaya SDPP – GTPP-150MW (of three turbines).

New capacities are aimed at increasing the reliability and flexibility of the Belarusian power grid. Gas-turbine power units will be used as a reserve both for the existing infrastructure and for future wind, solar and nuclear power plants. The commissioning of PSESs will contribute to the decarbonization of the economy and the transition to a new energy structure in Belarus.

The assumed operating time of each peak power facility is approximately 700 hours per year and up to 350 starts from the cold state. The ENERGAS gas receiving stations will also operate here. Process units with a capacity from 43,753 to 87,506 m3 / h will be installed on supply pipelines for filtration, flow measurement and heating of entering fuel gas.

REFERENCE:

Novopolotsk CHPP is the branch of RUE Vitebskenergo. Its installed capacity is 270 MW. Annual electricity output amounts to 0.8-0.9 billion kWh, and issue of heat ranges from 2.8 to 3 million Gcal.

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