The Vertical long axis semi submersible turbine pump energy industry application solution

The vertical long shaft semi submersible turbine pump has a wide range of application scenarios in the energy industry, and there are corresponding solutions and successful cases for different scenarios. The specific content is as follows:
1、 Core application scenarios
Thermal power generation scenario
Used in boiler feedwater system to provide stable and high-pressure feedwater for boilers, ensuring the continuity of power generation process; At the same time, in the cooling tower circulating water system, it is responsible for the circulation and transportation of cooling water, helping the unit dissipate heat, maintaining equipment operation at suitable temperatures, and adapting to the high temperature and high pressure resistance requirements of power plants.
Geothermal power station scenario
Extracting high-temperature geothermal water from deep underground and transporting it to turbine power generation equipment to drive the turbine to rotate and generate electricity. Afterwards, the cooled geothermal water can be injected back into the ground to complete the recycling of geothermal resources. The pump has high requirements for high temperature resistance and corrosion resistance.
Marine energy development scenario
Undertaking the water supply task of seawater desalination pretreatment on offshore oil and gas platforms, providing fresh water for platform life and production; In tidal power generation projects, by utilizing its bidirectional water transport characteristics and coordinating with the rise and fall of tides to achieve directional transportation of water bodies, efficient conversion of tidal energy can be achieved. Some models will be specially adapted to the marine salt spray corrosion environment with special materials.
Petrochemical scene
Transporting various chemical liquids, including corrosive acidic and alkaline media, with corrosion-resistant material characteristics, ensuring the safety and stability of liquid transportation in the chemical production process. At the same time, its compact vertical structure is suitable for the spatial layout of chemical plant areas.
Scenario of flue gas desulfurization in coal-fired power units
As the core equipment of the circulating slurry system in the desulfurization tower, transporting desulfurization slurry containing solid particles and strong corrosiveness, allowing the absorbent to fully contact with the flue gas, and achieving desulfurization treatment of the flue gas, is a key equipment for reducing emissions in coal-fired units.
2、 Targeted solutions
Solution for Thermal Power Generation Scenarios
For the high-temperature and high impurity circulating water and feedwater in power plants, the core components of the vertical long shaft semi submersible turbine pump are made of high-temperature and high-pressure resistant alloy steel material, matched with water lubricated rubber guide bearings, effectively resisting impurity wear; Simultaneously equipped with an intelligent monitoring system, real-time monitoring of bearing temperature, lubricating water pressure, liquid level and other parameters, achieving unmanned operation and maintenance, and reducing the risk of downtime due to faults.
Geothermal power station scenario solution
For high-temperature and weakly corrosive geothermal water media, the impeller of the vertical long shaft semi submersible turbine pump is made of super duplex steel material, and the bearing box is equipped with a water cooling system to solve the equipment loss problem caused by high-temperature media; At the same time, optimize the hydraulic model of the pump to improve the conveying efficiency in high-temperature media and ensure stable power generation of the power station.
Solution for Ocean Energy Development Scenarios
In response to the salt spray corrosion environment at sea, the overcurrent components of the vertical long shaft semi submersible turbine pump are made of super duplex steel material, and the motor is explosion-proof, suitable for harsh working environments at sea; In tidal power generation projects, a bidirectional water conveyance structure design is adopted to accurately transport water bodies in conjunction with tidal fluctuations, achieving efficient conversion of tidal energy.
Solution for Petrochemical Scenarios
For corrosive chemical media, the overcurrent components of the vertical long shaft semi submersible turbine pump are made of corrosion-resistant materials such as 304/316/904L stainless steel, duplex steel, and super duplex steel. Some components are equipped with wear-resistant lining plates to resist medium corrosion and wear; Simultaneously adopting modular design, key components are easy to replace and repair, reducing the difficulty of on-site maintenance.
Solution for flue gas desulfurization scenarios of coal-fired power units
For desulfurization slurries with high solid content and strong corrosion, the vertical long shaft semi submersible turbine pump adopts a long shaft vertical arrangement, placing key components such as motors and bearings above the liquid level to reduce contact with corrosive slurries and improve continuous operation stability; The overcurrent components are made of wear-resistant and corrosion-resistant high chromium cast iron or silicon carbide ceramic materials, and the sealing structure is optimized by using dual mechanical seals to prevent slurry leakage; In addition, the insertion depth of the pump body matches the depth of the slurry pool and the lowest liquid level, ensuring sufficient submergence depth at the suction port and reducing the risk of cavitation and evacuation.
3、 Typical application cases
Renovation of circulating water system in large-scale thermal power plants
In the renovation of the circulating water system in a multi million ton thermal power plant, multiple large flow and high head vertical long shaft semi submersible turbine pumps were selected, with a single pump flow rate of 1500-2500m ³/h and a head of 100-160m. The core components of the pump are made of high-temperature and high-pressure resistant alloy steel material, matched with water lubricated rubber guide bearings, effectively resisting the wear of impurities in the circulating water. At the same time, an intelligent monitoring system is equipped to monitor bearing temperature, lubricating water pressure, liquid level and other parameters in real time, achieving efficient unmanned operation and maintenance, reducing drainage failure downtime by more than 25% every year, and ensuring stable power generation of the power plant.
Coastal geothermal power station project
A coastal geothermal power station project adopts a vertical long axis semi submersible turbine pump adapted to high-temperature and weakly corrosive media, which is used to extract geothermal water at around 180 ℃ underground, with a single pump head of 120m. The impeller of the vertical long axis semi submersible turbine pump is made of super duplex steel material, and the bearing box is equipped with a water cooling system, effectively solving the equipment loss problem caused by high-temperature media, providing stable power generation water for the power station, and achieving thousands of hours of continuous and stable operation every year, providing stable green electricity for the local area.
Offshore oil platform seawater desalination system
A certain offshore oil platform uses a salt spray resistant vertical long shaft pump as the water supply equipment for seawater desalination pretreatment. The overcurrent components of the vertical long shaft semi submersible turbine pump are made of super duplex steel material, and the motor is explosion-proof, suitable for harsh offshore operating environments. The pump can stably extract seawater and deliver it to the desalination equipment, providing sufficient fresh water for the platform and solving the problem of fresh water supply for offshore operations. The equipment has been running for 3 years without any failures caused by corrosion.
Coal fired unit flue gas desulfurization project
A large coal-fired unit selected a vertical long shaft semi submersible turbine pump as the circulating slurry pump in the flue gas desulfurization system renovation. The key components of the pump, such as the motor and bearings, are placed above the liquid level to reduce contact with corrosive slurry. The overcurrent components are made of wear-resistant and corrosion-resistant high chromium cast iron material, and are equipped with dual mechanical seals to effectively prevent slurry leakage. In addition, the insertion depth of the pump body has been accurately calculated to ensure sufficient submergence depth of the suction port, avoiding cavitation and evacuation problems. After the renovation, the operational stability of the desulfurization system has been significantly improved, with a desulfurization efficiency of over 98%, while reducing the consumption of absorbents and electricity. This can save over a million yuan in operating costs annually.
In the energy industry, vertical long shaft semi submersible turbine pumps can be applied to multiple specific scenarios such as thermal power generation, nuclear power plants, geothermal power plants, offshore platform operation water supply, and seawater desalination pretreatment. The following are solutions for each scenario:
Thermal power generation and nuclear power plants
Application scenario: Thermal power plants and nuclear power plants require a large number of coolant delivery systems to ensure the safe operation of equipment.
Solution:
◦ Pump type selection: Choose a vertical long shaft semi submersible turbine pump, whose high head and large flow characteristics can meet the needs of the coolant delivery system.
Material selection: The overcurrent components of the vertical long shaft semi submersible turbine pump are made of high-temperature and high-pressure resistant materials, such as stainless steel or alloy steel, to ensure stable operation of the equipment in high-temperature and high-pressure environments.
Sealing design: Adopting a dual mechanical seal structure to prevent coolant leakage and ensure system safety.
Intelligent Control: Equipped with an intelligent control cabinet, it realizes functions such as automatic start stop, overload alarm, and remote monitoring based on liquid level, improving the automation level of equipment operation.
Geothermal power station
Application scenario: Geothermal power plants need to extract high-temperature geothermal water to drive turbines for power generation.
Solution:
Pump type selection: Choose a vertical long shaft semi submersible turbine pump, whose high temperature resistance can meet the needs of geothermal power plants.
Material selection: The overcurrent components are made of high-temperature resistant materials, such as special alloys or ceramic coatings, to extend the service life of the equipment.
Energy recovery: In geothermal power plants, integrated energy recovery devices can be considered to utilize the energy of high-temperature geothermal water to increase the feed pressure of raw water and reduce the total energy consumption of the system.
Water supply for offshore platform operations
Application scenario: Offshore platforms require stable water supply to meet their living and production needs.
Solution:
Pump type selection: Choose a vertical long shaft semi submersible turbine pump, whose salt spray corrosion resistance can adapt to marine environments.
Material selection: The overcurrent components are made of corrosion-resistant materials, such as super duplex steel or nickel bronze, to resist the corrosion of seawater.
◦ Marine life prevention device: using electrolytic water pollution prevention method, electrolytic copper aluminum anode pollution prevention method, or electrolytic seawater and electrolytic copper aluminum combined anti fouling method, effectively preventing marine attached organisms from adhering to the vertical long axis semi submersible turbine pump filter screen and inlet, ensuring the normal operation of the equipment.
Heating device: In cold sea areas, to prevent ice formation inside the pump body, a heating device can be installed on the lifting pipe near the water surface and at a certain distance below the water surface to ensure that the vertical long shaft semi submersible turbine pump can be put into operation normally in the harsh winter season.
Pre treatment of seawater desalination
Application scenario: The seawater desalination system requires pre-treatment of seawater to remove impurities and salts, thereby improving desalination efficiency.
Solution:
◦ Pump type selection: Choose a vertical long shaft semi submersible turbine pump, whose high flow rate and corrosion resistance can meet the needs of seawater desalination pretreatment systems.
Material selection: The overcurrent components of the vertical long shaft semi submersible turbine pump are made of corrosion-resistant materials, such as duplex steel or super duplex steel, to resist the corrosion of seawater.
◦ Filtration device: A filtration device is installed at the inlet of the pump to remove large particle impurities from seawater and protect the pump body from wear and tear.
Intelligent monitoring: equipped with intelligent sensors, real-time monitoring of bearing temperature, vibration data and other parameters to prevent sudden failures during offshore operations.