Reconstruction of a thermal power station at Production Unit 4 into a steam and gas thermal power station (2011). Reconstruction of a thermal power station of Production Unit 4 with electrical output increase of 30 MW (2013)

At Production Unit 4 JSC Belaruskali manufactures potash fertilizers with halurgic method of processing of sylvite ores. This method is more power-consuming than others, as it requires significant quantities of heat. The main source of heat supply for such manufacturing processes is a thermal power station. Annual delivery of heat for the technology (in the form of steam 1.4 MPa, 0.6 MPa, 0.8 MPa) is about 1 million Gcal which makes up about 90 % of the total delivery of thermal energy at the thermal power station. Annual power consumption at Production Unit 4 is from 300 to 340 million kWh. Annual power generation of the thermal power station amounted to 40 million kWh before the reconstruction. Accordingly, the demand for power of Production Unit 4 was mainly met by the power supply system. Taking into consideration the heat demand of Production Unit 4, mostly the demand for steam, it was decided to use heat-recovery gas-turbine units of steam and gas cycle with power output of 30 MW.

As a result in 2012 and 2013 our company realized two projects (“Reconstruction of a thermal power station at Production Unit 4 into a steam and gas thermal power station” and “Reconstruction of a thermal power station of Production Unit 4 with electrical output increase of 30 MW”)

During project implementation PASSAT LLC as the general contractor constructed two gas-turbine power stations equipped with the following units:

 Siemens cogeneration units SGT-700 with power output of 30 MW – 2 units;

 steam boiler (Aalborg Engineering):

steam pressure – 14 bar;

steam temperature – 215 0С;

steam consumption – 59,1 t/h;

temperature of the feeding water – 102 °С;

 heating system economizer (District Heating – DH):

water pressure – 12 bar;

water discharge – 68 t/h;

intake temperature – 70 °С;

outlet temperature – 115 °С;

​​​​​​​ compressed gas boosting plant – 4 units:

intake gas pressure – 1,2 MPa;

outlet gas pressure – 2,9 MPa;