Lime Dosing System

Lime Dosing System for Controlled Chemical Conditioning in Water Treatment

A Lime Dosing System is engineered for the preparation and controlled injection of lime solution or lime slurry into industrial treatment processes. The system is used where accurate lime addition is required for pH correction, alkalinity adjustment, neutralisation, and chemical conditioning within continuous water treatment operations.

A lime system in water treatment helps maintain a controlled chemical balance during process operation while supporting efficient downstream treatment performance. These systems are commonly integrated into industrial water treatment plants, wastewater treatment facilities, utility systems, and process industries where stable lime preparation and dosing are operationally critical.

Lime Slurry Preparation and Solution Formation

The system operates through a controlled preparation cycle where hydrated lime or quicklime is mixed with water inside the preparation tank to produce a uniform slurry solution.

The preparation process includes:

• Controlled lime feeding
• Water dosing and dilution
• Initial slurry formation
• Retention for proper hydration
• Transfer to the dosing section

Proper hydration and mixing help maintain slurry consistency and support stable lime dosing during continuous treatment operation.

Lime Slurry Agitation and Tank Circulation

The agitation system is designed to maintain uniform lime suspension within the tank while preventing particle settlement during operation.

The mixing arrangement typically includes:

• Slow-speed agitators for continuous slurry circulation
• Anti-settling tank configuration
• Uniform solids suspension
• Controlled mixing intensity

This arrangement helps maintain consistent slurry characteristics throughout the operating cycle while supporting reliable transfer conditions for the dosing section.

Dosing Pump Selection and Slurry Injection

The dosing section regulates the transfer of prepared lime slurry into the treatment line at controlled injection rates based on process requirements.

The chemical feed arrangement includes:

• Diaphragm dosing pumps
• Progressive cavity pumps
• Injection piping assemblies
• Pressure regulation components
• Flow control valves

Pump selection depends on slurry concentration, injection pressure, transfer distance, and process operating conditions.

Process Applications of Lime Dosing

Lime injection is used across industrial treatment processes where controlled chemical conditioning is required to maintain stable operating performance and support downstream treatment efficiency.

Common process applications include:

• Neutralisation of acidic process streams
• Mineral and solids treatment operations
• Clarification and settling improvement
• Industrial wastewater conditioning
• Sludge treatment and dewatering support
• Process water conditioning systems

The system enables controlled slurry injection under varying plant operating conditions while supporting stable chemical treatment performance across continuous operations.

Installation Areas Across Industrial Sectors

The NND Oil & Gas Lime Dosing System is installed across industries where continuous chemical preparation and lime injection are required within treatment operations. 

Typical installation areas include:

• Effluent treatment plants (ETP)
• Sewage treatment plants (STP)
• Power generation facilities
• Mining and mineral processing plants
• Chemical processing industries
• Municipal water treatment systems
• Industrial utility water systems

The skid-mounted arrangement allows integration into both new and existing treatment infrastructure.

Lime Handling Equipment and Feed System

The lime handling section is designed to support uninterrupted material transfer from storage to the preparation system during continuous operation.

Depending on process requirements, the arrangement may include:

• Lime storage hoppers
• Screw feeder systems
• Bag unloading stations
• Dust containment enclosure 
• Slurry transfer pumps

The feeding configuration is selected based on lime form, dosing capacity, storage requirement, and plant operating conditions.

System Automation and Operational Monitoring

The system can be integrated with automatic monitoring and control systems for improved dosing management and operational reliability.

Automation features may include:

• PLC-based control systems
• Tank level monitoring
• Automatic water filling control
• Dosing rate adjustment
• Pump interlock systems
• Alarm and protection functions

These controls help maintain consistent system operation while reducing manual intervention during treatment processes.

Construction Materials and Structural Configuration

The structural configuration is selected according to slurry properties, operating environment, and corrosion or abrasion conditions within the process.

Construction options may include:

• Stainless steel skid structures
• Mild steel with protective coating 
• HDPE or FRP preparation tanks
• Corrosion-resistant piping
• Industrial-grade wetted components

The skid layout is designed to support operational accessibility, structural stability, and long-term industrial service.

Technical Specifications of Lime Dosing System

Contact NND Oil & Gas for Lime Dosing System Requirements

For lime slurry preparation systems, industrial lime dosing skids, or customised lime dosing systems in water treatment applications, our engineering team can assist with system selection and configuration based on your process conditions.

Contact us for customised lime dosing solutions designed for industrial water treatment, wastewater processing, chemical conditioning, and continuous process operations.

Frequently Asked Questions

How do I determine the correct lime concentration for a Lime Dosing System?

The required concentration depends on treatment objectives, raw water chemistry, reaction time, and downstream process sensitivity. Incorrect concentration can reduce dosing efficiency or cause scaling issues.

What are common signs that a Lime System requires maintenance?

Performance issues often develop gradually and can affect treatment consistency.

Typical warning signs include:

• Inconsistent pH correction
• Slurry line blockages
• Pump pressure fluctuation
• Excessive lime residue build-up
• Reduced chemical transfer efficiency

How does slurry temperature affect Lime Dosing System performance?

Temperature influences hydration efficiency and slurry stability.

Lower temperatures may cause:

• Slower hydration
• Reduced suspension quality
• Poor mixing consistency

Higher temperatures can accelerate reaction instability.

Can the Lime System be used with variable lime purity levels?

Yes, but systems must often be adjusted to compensate for changing reactivity, moisture content, and inactive material percentage.