The installation of the Goodwin Submersible Slurry Pump marked a significant improvement for the Power Plant. Not only did it efficiently desilt the cooling tower basin during shutdowns, but it also led to substantial cost savings by eliminating the need for expensive periodic cleaning contracts. Moreover, the reduced downtime during shutdowns contributed to increased productivity…
How Goodwin Submersible Slurry Pumps Improved Cooling Tower Efficiency at a 1200 MW Power Plant
Thermal power remains one of India’s largest contributors to national electricity generation, powering major industrial, commercial and residential regions. However, maintaining the efficiency of critical infrastructure such as cooling towers is essential for ensuring smooth operation and preventing costly downtime.
This case study details how a major 1200 MW thermal power plant in Uttar Pradesh, operational since 2010, significantly improved cooling tower desilting efficiency—and reduced maintenance costs—by integrating Goodwin HNZE (100 ANZE equivalent) submersible slurry pump technology into its basin cleaning process.
The Challenge of Basin Silt and Sludge Accumulation
Cooling towers in thermal power plants are responsible for dissipating heat produced during steam-based electricity generation. Their performance depends on the reliability and cleanliness of key components, including:
- Fill media
- Fan assembly
- Spray nozzles
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Cooling water basin
Over time, this cooling basin accumulates:
- Silt and fine sediment from recirculated water
- Sludge formed from biological growth
- Deposits from dust-laden air are common in northern India
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Debris and particulate matter from the plant surroundings
During planned shutdowns, this build-up must be removed to prevent:
- Blocked strainers and pumps
- Reduced cooling efficiency
- Overheating and forced outages
- Higher power consumption
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Corrosion and equipment wear.
Historically, the plant relied on external contractors and low-quality pumps to clean out the basin, resulting in high costs, extended shutdown times, and considerable manual labour.
Inefficient Desilting Leading to High Maintenance Costs
During each shutdown cycle, the plant spent significant time and money draining the cooling basin, removing silt manually, and hiring third-party contractors. The existing pumps:
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Lacked the power to remove compacted sludge
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Experienced frequent clogging
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Could not transfer high-solids mixtures
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Required labour teams to manually shovel and lift silt
This process extended shutdown duration and diverted maintenance manpower from critical plant tasks.
The Head of Maintenance, already familiar with Goodwin’s track record in slurry management, approached Goodwin India to evaluate a more efficient and cost-effective solution.
Reduce Desilting Time, Lower Contractor Costs and Improve Maintenance Efficiency
The plant required a solution that would:
- Reduce manual labour
- Lower or eliminate contractor desilting costs
- Remove silt and sludge before water levels dropped too low
- Speed up cooling tower maintenance cycles
- Improve basin hygiene and cooling efficiency
- Deliver long-term reliability despite continuous abrasive duty.
Goodwin’s engineers conducted a technical assessment of the basin conditions, sludge density, sediment profile and shutdown cleaning workflow.
Installing the Goodwin 100 ANZE Submersible Slurry Pump
Goodwin found that the major bottleneck was the use of light-duty submersible pumps, which could not handle dense sludge and required manual clearing. To address this, Goodwin recommended the 100 ANZE heavy-duty submersible slurry pump, renowned for its exceptional performance in abrasive industrial environments throughout India.
Key Features of the Goodwin 100 ANZE Submersible Slurry Pump
- High-chrome wear-resistant construction to withstand abrasive sludge
- Inbuilt agitators to resuspend settled solids, ensuring continuous sediment flow.
- Non-clog impellers for uninterrupted operation, even with high debris loads.
- Twin volute casings to reduce load on bearings and increase lifespan.
- High solid-handling capacity, ideal for Himalayan sediment conditions.
- Submersible design eliminates the need for extensive above-ground infrastructure.
This solution allowed the plant to pump out sludge directly during the shutdown window, dramatically reducing manual intervention.
"We are highly impressed with the performance and cost-effectiveness of the Goodwin Submersible Slurry Pump. It has revolutionized our desilting process, saving us both time and money. The reliability and efficiency of this solution have exceeded our expectations, and we look forward to continued collaboration with Goodwin for our pumping needs. "
Significant Time and Cost Savings for the Thermal Power Plant
- Faster Basin Cleaning During Shutdowns - The pump effectively removed silt and sludge without requiring the basin to be fully drained.
- Reduced Manual Labour Requirements - Labour teams no longer needed to manually shovel or vacuum sludge.
- Elimination of Expensive External Contractors - The plant reduced long-term maintenance expenditure by conducting desilting in-house.
- Higher Operational Uptime - Reduced shutdown cleaning time allowed faster restart of the cooling system.
- Improved Basin Cleanliness and Thermal Efficiency - Cleaner cooling water improves heat transfer, reducing operational strain on equipment.
- Lower Total Cost of Ownership - Goodwin pumps offer long service life and reduced maintenance needs, increasing overall plant efficiency.
A critical aspect of the successful pump implementation was Goodwin Africa’s dedicated technical support team, which:
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Provided on-site assistance during installation and commissioning.
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Conducted operator training to ensure plant personnel could effectively manage and maintain the pumps.
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Performed ongoing monitoring and performance evaluations to optimize system efficiency.
Frequently Asked Questions Relating to Cooling Tower Basin Desilting for Thermal Power Plants
Cooling water carries suspended solids, dust, biological residues and airborne matter. Over time, these accumulate as silt and sludge in the basin, requiring periodic desilting to maintain cooling efficiency and prevent equipment blockage.
The ANZE pump features an inbuilt agitator, high-solids handling impeller and robust hydraulic design, enabling it to lift and pump dense sludge without clogging—significantly reducing labour and downtime.
Yes. Plants using Goodwin slurry pumps can perform basin desilting in-house, eliminating repeated contractor charges and reducing maintenance costs.
Cleaner basins improve heat exchange efficiency, reduce strain on pumps and cooling equipment, and contribute to stable thermal performance. This results in lower energy consumption and higher uptime.
Goodwin ANZE pumps are engineered for both periodic shutdown cleaning and repeated desilting operations. They maintain performance even in high-density sludge conditions.
Yes. Goodwin India offers full technical support, site assessment, installation advice and spare parts availability across major industrial regions.
