Supply of pumping equipment and pipeline fittings within implementation of the project for the reconstruction of booster pumping station No. 3 of PJSC Kamchatskenergo, Petropavlovsk-Kamchatsky.
EnergoFront continues to strengthen cooperation with PJSC RusHydro as part of the implementation of the project for the reconstruction of the booster pumping station No. 3 of PJSC Kamchatskenergo. PJSC Kamchatskenergo is a Russian regional energy company, part of the RusHydro group. It is the main guaranteeing supplier of electrical energy in the Central and Ozerny power centers of the Kamchatka Territory. A peculiarity of the energy sector of the Kamchatka Territory is its isolation from the Unified Energy System of Russia and the neighboring Far Eastern regions. Heat supply from energy sources of PJSC "Kamchatskenergo" is carried out in Petropavlovsk-Kamchatsky from CHPP-1 and CHPP-2. In providing heat to the city of Petropavlovsk-Kamchatsky, the share of thermal power plants is more than 59% of the heat produced in the region. Electricity generation by the stations of Kamchatskenergo PJSC in 2022 amounted to 1637.01 million kWh, thermal energy supply - 1753.443 thousand Gcal.
Booster pump station No. 3, located in Petropavlovsk-Kamchatsky, is designed to provide the required hydraulic operating modeof the heating networks.
The heating water comes from external heating networks. The source of heat supply is Kamchatka CHPP-2.
The temperature schedule of the heating network is 150/70°C with a cutoff at 75°C. The estimated consumption of heating water is up to 3000 m3/hour.
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Supply pipeline (to pumps/after pumps): 0.87/1.57 MPa;
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Return pipeline 1.08 MPa.
The estimated pressure in the main heat network is:
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supply – 1500 m3/hour;
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head – 70 m;
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electrical power - 400 kW;
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temperature of the pumped liquid – up to 150°C;
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the pumping unit must be designed to work with a frequency converter.
Booster pump station No. 3 is equipped with three physically and physically obsolete pumping units of the SE 1250-70-11 series. The efficiency of pumping units does not exceed 80%, and the work parameters do not meet the new requirements of the heat supply scheme in Petropavlovsk-Kamchatsky. Withindesign documentation, new pumping equipment must meet the following characteristics:
The specialists of our company were faced with the task of finding a technical solution for pumping units in accordance with the customer's requirements. This solution must ensure high performance of the pumping station and meet all requirements for regulation and reliability of operation, and also lead to a significant reduction in electricity costs for own needs. Due to the current political situation in the world, the use of imported equipment entails risks with timing supply of both the equipment itself and further components for it.
The engineers of our company, together with JSC HMS Livgidromash, developed a technical solution based on three DeLium pumping units D300-460A-444-CC-tt-UHL 3.1. All pumping units are equipped with electric motors (N=400 kW, U=380V, 50 Hz, n=1500 rpm) with frequency control. Two pumping units will be in operation, one in reserve according to the technological heat supply diagram.
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flow path hydraulics, maximally optimized to achieve high efficiency;
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the body is made of high strength materials, such as nodular cast iron, or steel, capable of withstanding internal pressure up to 25 kgf/cm2;
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the shaft is made of high-strength chromium steels and is completely isolated from the pumped medium and the atmosphere by protective m bushings;
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The dimensions of the mechanical seal chambers comply with API 682 to allow the use of seals from various manufacturers. A large selection of material designs ensures that the pumps can be used in all industries. An electric motor, a gasoline/diesel engine, or a turbine can be used as a drive. Excellent suction capacity, low NPSH;
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reduced dimensions of the pump and the unit based on it compared to pumps of the SE type by 20%, compared to pumps of the D type by 10%. The weight of the pump is reduced by 25-40% in comparison with pumps of the SE type and by 5-10% in comparison with pumps of the D type of the same type productivity;
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use of wear-resistant materials for gap seal rings. Designed with replaceable rings on the working wheel;
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a two-helix spiral in the housing reduces the radial load on the shaft;
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suction and discharge pipes made “in line”;
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standard or reinforced bearings with grease lubrication that do not require cooling systems even at temperatures the pumped medium is 150°C, the bearing life is increased and ranges from 16,000 to 100,000 hours;
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wide model range (more than 45 standard sizes) and the use of at least two interchangeable impellers for one the standard housing size allows you to select a pump for any task within the flow range from 80 to 10,000 m3/h and pressure from 5 to 200 m.
DeLium pumping units produced by JSC "GMS Livgidromash" are a line of unified double-entry pumping units to replace the outdated series of pumps of type D and SE. The pumps are designed taking into account modern requirements for energy consumption and reliabilityand long service life and have the following design features:
Thanks to these characteristics, DeLium pumping units become unique compared to other domestic pumping units units and are not inferior to modern analogues of foreign production, and in some characteristics they are superior to them.
A feature of the proposed technical solution is the use of steel pump units.Housing and the workingwheel is made of steel 25L. This ensures reliable operation of the pump at high pressure in the casing and increased loads on the pipes caused by high temperatures of the pumped medium. Taking into account the high seismic resistance of the operating area, the steel design of the pump makes it possible to increase the reliability and safety of the entire pumping unit.
A feature of the proposed technical solution is the use of steel pump units.Housing and the workingwheel is made of steel 25L. This ensures reliable operation of the pump at high pressure in the casing and increased loads on the pipes caused by high temperatures of the pumped medium. Taking into account the high seismic resistance of the operating area, the steel design of the pump makes it possible to increase the reliability and safety of the entire pumping unit.
Graphic characteristics of the pumping unit DeLium D300-460A-444-CC-TT-UHL 3.1.
As a result of the joint work of specialists from EnergoFront, Livgidromash and PJSC Kamchatskenergo, the proposed technical solution regarding pumping equipment was finally agreed upon and included in the working documentation.
In addition to pumping equipment within the framework of this project, to be able to maintain the required pressure among consumers andat the heat supply source, in accordance with the project, it is envisaged to replace the existing control butterfly valves on the main heat pipeline.
We offered 3-eccentric butterfly valves DN500 and DN300 manufactured by ChelyabinskSpetsGrazhdanStroy LLC - LD trademark with electric drive GZ.
A design feature of these butterfly valves is a disc with a pressure ring. Stamped stainless steel ring 12Х18Н10Т due to its configuration, when closing, applies uniform force to the seat along the entire circumference, which ensures tightness in both directions of flow. This seal design ensures maintainability due to the possibility replacing the pressure ring.
LD valves are triple offset valves. 3rd eccentricity design ensures zero leakage with the least possible tightening torque. Metal/metal sealing with 3rd eccentricity in butterfly valves ensures free from friction opening of the disc at maximum pressure drop. At the same time, the 3rd eccentricity design protects the disc from jamming.
This valve design fully complies with the stated requirements of the customer and is approved as equipment thatwill be installed as part of this project.
Thanks to close and productive work with each project participant, our engineers were able to simultaneously solve several problems: select modern domestic equipment instead of imported equipment, increase the reliability and productivity of the pumping station, and also reduce costs for your own needs.
Project achievements
