Power Plant Slurry Pump Solutions
Engineered for highly abrasive and corrosive operating conditions, such as flue gas desulfurization (FGD), ash handling systems, fly ash transport, coal slurry transfer, wastewater treatment, and cooling water circulation, this system enhances pumping efficiency and stability for maximum service life.
Common Pumping Applications in Power Plants
Flue Gas Desulfurization (FGD)
Where is a FGD slurry pumping system used in FGD?
FGD pumps are typically located in the boiler and dust collector positions within flue gas desulfurization systems, used to transport limestone, gupsum slurry, and absorber water circulation.
Challenge
- Wear: Limestone and other solid particles can severely erode and wear down the pump impeller.
- Corrosion: FGD slurry contains high levels of chloride ions and sulfides, which significantly reduces pump life.
- Continuous Operation: Desulfurization systems require 24/7 operation, and flue gas desulfurization pumps need to maintain long-term stability.
Requirements for FGD pumps
In FGD (Fluorescent Diffusion) applications, FGD pumps are required to possess not only excellent wear and corrosion resistance but also good corrosion resistance to ensure long-term delivery of FGD slurry.
FGD pumps offer wear and corrosion resistance unmatched by ordinary pumps. Utilizing technologies such as high-chromium alloys, rubber, and non-clogging impellers, FGD pumps excel in FGD applications.
Ash Handling Systems
Where is an ash slurry pump used in ash handling systems?
In ash handling systems, the ash slurry pump is mainly located at the rear of the boiler and is used to transport ash and slurry, ensuring that the ash is smoothly transported to the dewatering system.
Challenge
- Clogging: Large solid particles in slag and ash slurry, especially large-diameter solids, easily clog impellers and pipes.
- High abrasion: Sharp solids in slag impact the impeller surface over time, easily causing wear on the metal surface.
- High solids content: Ash slurry and slag contain a large number of fine particles; high solids content makes the slurry prone to settling.
Requirements for ash slurry pumps
In ash handling systems, ash slurry pumps require excellent anti-clogging properties and stable pressure to ensure that clogging and slurry settling are avoided during long-term operation.
Ash slurry pumps employ a non-clogging impeller and a large-channel design, and can achieve powerful and stable flow and pressure output through series connection.
Fly Ash Transport
Where is a fly ash slurry pumping system used in fly ash transport?
Fly ash slurry pumps are commonly used in electrostatic precipitators and bag filters for fly ash transport. A professional fly ash slurry pump smoothly delivers fly ash slurry to the thickening tank.
Challenge
- Settling: Fly ash slurry contains a large number of fine particles. When pumping efficiency is unstable or the pump stops, the slurry is prone to settling or clogging the pipeline.
- Abrasion: Prolonged erosion of wet end parts such as impellers and volutes by fly ash slurry causes severe wear.
- High Concentration: High-concentration fly ash slurry requires stable and higher power and pressure during transportation.
Requirements for fly ash slurry pumps
For high-abrasion and high-concentration operating conditions, slurry pumps need to be more abrasion-resistant and possess excellent pumping performance to adapt to high-abrasion and long-term operation.
Fly ash slurry pumps can be customized for special operating conditions by changing the material of wet end parts, extending wear life and reducing downtime.
Coal Slurry Transfer
Where is a coal slurry pumping system used in coal slurry transfer?
Coal slurry pumps are commonly used in coal preparation and washing systems to transport coal slurry, wastewater, etc. Their excellent performance and abrasion resistance ensure smooth transport of coal slurry.
Challenge
- High viscosity: High-viscosity coal-water slurry is more difficult to transport than ordinary water and also increases power consumption.
- Corrosion: Coal slurry contains a certain degree of corrosiveness; long-term transportation of coal slurry will cause corrosion to pump parts.
- Susceptibility to wear: Long-term scouring of the pump by coal particles will damage the sealing system and impeller, and may even cause leaks.
Requirements for coal slurry pumps
Coal slurry pumps can be designed for high-viscosity applications by using non-clogging or high-flow-rate impellers and by modifying the materials of wet end parts to improve the pump’s abrasion and corrosion resistance.
Wastewater Treatment
Where is a slurry pumping system used in wastewater treatment?
Slurry pumps are commonly used in industrial wastewater systems, FGD wastewater systems, and wastewater recycling systems, specifically for transporting solid-containing slurries such as desulfurization waste residue and sludge.
Challenge
- Corrosion: Desulfurization wastewater typically contains a high amount of corrosive chemicals, such as acids, alkalis, and chloride ions, which can cause severe corrosion.
- Clogging: The wastewater contains a large number of impurities, and may even contain large pieces of solid waste with long fibers, which can easily cause blockages at pipe inlets or impellers.
- Complex Media: Because the wastewater contains many complex media with fluctuating slurry properties, pumping efficiency can vary.
Requirements for slurry pumps
To cope with corrosive and complex media conditions, slurry pumps not only need strong corrosion resistance but also excellent solids throughput.
Submersible sewage pumps, equipped with filters and cutterheads, are ideal for conveying wastewater. They can efficiently complete these complex tasks and operate for extended periods in corrosive environments.
Cooling Water Circulation
Where is a slurry pumping system used in cooling water circulation?
In cooling water circulation, slurry pumps are commonly used in cooling towers and condensation systems to deliver cooling water or circulating water to reduce equipment temperature and facilitate the condensation process.
Challenge
- High flow rate: Cooling systems typically require extremely high flow rates and need to operate around the clock.
- Corrosion: Especially in seawater cooling systems, the high chloride ion concentration in seawater can corrode the pumping equipment.
- Wear: During prolonged operation, impurities or small particles in the water continuously erode the pump’s metal surface, causing wear.
Requirements for slurry pumps
Because cooling water circulation requires the delivery of water over long periods and at high flow rates, slurry pumps must have excellent hydraulic design to ensure high-efficiency delivery and reduce energy consumption.
They can also utilize corrosion-resistant materials and robust bearing systems to guarantee a long service life.
Have power plant drawings, slurry data, or system specifications?
Send them to info@kingdagroup.com for a faster, application-focused pump solution.
The Kingda TL series FGD pump is suitable for harsh, highly abrasive conditions, such as flue gas desulfurization and ash handling systems. Its wet end parts are made of abrasion- and corrosion-resistant high-chromium alloy, maintaining stable flow and pressure even under prolonged impact from sharp solids, maximizing service life.
The excellent non-clogging impeller and large-channel design significantly improve the throughput of large-diameter solids, handling large particles with ease and virtually eliminating clogging. This reduces downtime and lowers operating costs for users.
Pumping Challenges in Power Plants
Abrasive Slurry
Abrasive slurry is the most typical slurry in power plants. Whether it is limestone, fly ash or impurities in wastewater, as long as it washes against the metal surface of the pump for a long time, it will cause wear to the pump, thereby affecting the conveying efficiency or even causing pump damage.
Chloride Corrosion
In seawater cooling systems, slurries containing large amounts of chloride ions are generated. These chloride ions can damage the passivation film on the metal surface, accelerating metal corrosion. For example, pitting corrosion can occur, and under prolonged scouring, pump components (such as impellers) can even crack directly.
Continuous Operation
Stability and reliability are the most important factors in all engineering projects, especially in power plant applications. If the pumping equipment malfunctions, it will lead to downtime and even stop the upstream and downstream processes, which will obviously increase the user’s costs.
High Solids
Fly ash slurry in power plants typically contains a large number of fine particles. Although the particles are small, they are highly abrasive, and ordinary metal pumps can hardly withstand their impact. The biggest problem is that it is very prone to settling, which can easily cause pipeline blockage.
Acidic Media
FGD wastewater usually contains a lot of acidic media. When these acidic media come into direct contact with metals, an inevitable chemical reaction will occur, which will cause the metal surface to gradually thin. If acidic media are pumped for a long time, the metal may even be dissolved.
Lime Slurry Pump
Discharge Diameter(mm): 65 ~ 1000
Capability(m³/h): 50 ~ 18000
Head(m): 15 ~ 50
NPSHr(m): 4.5 ~ 8.5
Submersible Sewage Pump
Discharge Diameter(mm): 50 ~ 350
Capability(m³/h): 30 ~ 3500
Head(m): 10 ~ 120
Motor: 3-55kW, 380V, 50Hz (Customization available)
The Kingda limestone slurry pump boasts excellent abrasion and corrosion resistance. Wet end parts (such as impellers and volutes) can be made of high-chromium alloy or rubber, ensuring robust compatibility and allowing our pumps to easily withstand impacts from hard, sharp solids.
Excellent corrosion resistance guarantees long-term, stable pumping. Whether it’s acidic, alkaline, or chloride media, the Kingda lime slurry pump can meet all-weather operating requirements.
Why Kingda for Power Plant Applications
As one of the earliest FGD pump factories in China, we have a rich history. Since 1948, we have focused on the design and manufacture of slurry pumps, accumulating incredible manufacturing experience. From initial design to final installation, our engineers consistently provide users with comprehensive and reliable service.
Furthermore, we have a professional maintenance team that only appears when users encounter various problems. Their extensive knowledge and decades of industry experience ensure that they can quickly and promptly resolve issues encountered during operation, minimizing users’ operating costs.
Proven Solutions Backed by Project Results
Coal Power Plant
This project is a coal-fired power plant with a total installed capacity of 180MW, primarily responsible for providing heating and electricity to surrounding factories and residents.
Kingda was commissioned by the power plant to design the ash and slurry transportation and circulation systems. Following our engineers’ research, Kingda optimized the existing slurry pumping solution for the project to adapt to high-wear, high-solids-content operating conditions.
Kingda Solution
Kingda engineers designed key wet-end parts within the pumps using wear-resistant materials to enhance adaptability and stability under extreme conditions, meeting all-weather operation requirements.
Through optimization and a redesigned pumping scheme, the power plant effectively extended the service life of equipment under high-wear conditions, significantly reduced the frequency of equipment maintenance, and minimized the power plant’s costs.
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FAQ
Heavy-duty centrifugal slurry pumps, such as FGD pumps, lime slurry pumps, and submersible sewage pumps, are commonly used in FGD systems.
Their wet end parts are made of high-chromium alloys and rubber, which have excellent wear and corrosion resistance and can effectively withstand corrosion from media such as acids, alkalis, and chlorides, as well as the scouring of solids.
The Gypsum slurry pump is a heavy-duty, abrasion-resistant, and corrosion-resistant slurry pump specifically designed for conveying corrosive, abrasive, and viscous slurries such as gypsum.
Compared to ordinary slurry pumps, it utilizes more wear-resistant and corrosion-resistant high-chromium alloy materials, enabling smoother conveying of gypsum slurry.
The Ash slurry pump is undoubtedly the ideal choice for ash handling applications. It is a horizontal, heavy-duty, centrifugal slurry pump with a stable structure that ensures long-term transport of solid slurries.
The Ash slurry pump's wear parts are made of high-chromium alloy and rubber, which greatly improves its wear and corrosion resistance. The non-clogging impeller and wide flow channels ensure the passage of large solids without clogging.
Rubber is suitable for conveying acidic slurry because it is not easily oxidized, especially by chloride ions, which cause almost no electrochemical corrosion. Moreover, rubber is very effective at resisting the wear of fine particles in acidic slurries (such as chemical slurries and chlorine-containing slurries), even better than metal. Therefore, many slurry pumps use rubber lined to handle acidic slurries.
