Dry Chemical Feed Systems
Series A-758™ Paste-Type Lime Slaking System
Lime is one of the most common and economical chemicals used in the water and wastewater treatment process. The cost of commercial
bulk hydrated lime or prepared lime slurry solutions, however, becomes prohibitive for installations requiring a continuous, high volume supply, typically greater than 45 kgs/hr (100 lbs/hr). To help alleviate this cost, on-site slaking or hydration is the ideal solution. The Series A-758™ lime slaker provides for reliable, efficient slaking of various grades of quicklime (CaO) at a substantial savings over other slaking methods. Through the pioneering use of paste-type slaking technology, the Series A-758™ lime slaker consistently produces a more reactive lime slurry requiring less energy and less operator attention. The compact size and flexible configuration make this pre-engineered system ideal for new and retrofit installations.
KEY BENEFITS
• Saves water, heat and power
• Economical and reliable on-site slaking
• Easy to install, unit is factory pre-tested
• Choice of final slurry concentration
• Flexible controls: manual, flow proportional, and automatic start-stop
FEATURES
Superior Paste-Slaking Process
Utilizing a 2:1 water-to-lime ratio, the A-758™ unit slakes lime as paste which provides a number of benefits over the more traditional 4:1 water-to-lime or slurry slaking process. This includes less power, faster slaking, a smaller footprint and, most importantly, a more reactive lime slurry solution.
Saves Power
The 2:1 paste slaking process generates its own slaking heat from the hydration heat of reaction (CaO+H20 = Ca(OH)2 + Heat (490 btu/lb)). This avoids the need and expense of an external heat source, internal heat exchangers, and temperature control systems. Additionally, slow speed agitation requires one-half the horsepower of equivalent sized slurry slakers.
Fast Slaking
The low water-to-lime ratio and high self-generating heat of reaction completes the slaking process in approximately five minutes. This short retention time leads to efficient start-stop or batching operation and rapid changes in lime concentration when required. Compact Size The 2:1 slaking ratio and short retention time allows for a smaller slaking compartment without bulky insulation or any need for a water jacket. The A-758™ lime slaker takes about 20% less floor space than other designs.
More Reactive Hydrate Particles
The intense heat [>82° C(180° F)] generated by the 2:1 slaking ratio subjects the quicklime to steam penetration. The resulting internal pressure promotes the fracturing of the quicklime into smaller, highly reactive particles. This means more surface area for more efficient lime usage.
Controlled Consistency
An automatic, torque-actuated water inlet valve provides precise, continuous control of paste consistency and, therefore, the slaking process. Variations in lime quality and feed rate are quickly recognized and the optimum slaking rate is maintained, without operator intervention.
Integrated System Design
The pre-engineered A-758™ lime slaker system is available with a broad range of capacities, capabilities and control options:
• Four different capacities from 450 to 3600 kgs/hr (1000 to 8000 lbs/hr)
• Specific gravity classification or screen-type grit removal technology
• Gravimetric or volumetric belt-type lime feeders or screw-type lime feeder
• PLC or relay logic controls with an optional automatic batching function
Please contact us here for more information on our Lime Slaker Systems, product specifications, or a customized project quote or chat with us now by clicking on the chat icon in the bottom right.
bulk hydrated lime or prepared lime slurry solutions, however, becomes prohibitive for installations requiring a continuous, high volume supply, typically greater than 45 kgs/hr (100 lbs/hr). To help alleviate this cost, on-site slaking or hydration is the ideal solution. The Series A-758™ lime slaker provides for reliable, efficient slaking of various grades of quicklime (CaO) at a substantial savings over other slaking methods. Through the pioneering use of paste-type slaking technology, the Series A-758™ lime slaker consistently produces a more reactive lime slurry requiring less energy and less operator attention. The compact size and flexible configuration make this pre-engineered system ideal for new and retrofit installations.
KEY BENEFITS
• Saves water, heat and power
• Economical and reliable on-site slaking
• Easy to install, unit is factory pre-tested
• Choice of final slurry concentration
• Flexible controls: manual, flow proportional, and automatic start-stop
FEATURES
Superior Paste-Slaking Process
Utilizing a 2:1 water-to-lime ratio, the A-758™ unit slakes lime as paste which provides a number of benefits over the more traditional 4:1 water-to-lime or slurry slaking process. This includes less power, faster slaking, a smaller footprint and, most importantly, a more reactive lime slurry solution.
Saves Power
The 2:1 paste slaking process generates its own slaking heat from the hydration heat of reaction (CaO+H20 = Ca(OH)2 + Heat (490 btu/lb)). This avoids the need and expense of an external heat source, internal heat exchangers, and temperature control systems. Additionally, slow speed agitation requires one-half the horsepower of equivalent sized slurry slakers.
Fast Slaking
The low water-to-lime ratio and high self-generating heat of reaction completes the slaking process in approximately five minutes. This short retention time leads to efficient start-stop or batching operation and rapid changes in lime concentration when required. Compact Size The 2:1 slaking ratio and short retention time allows for a smaller slaking compartment without bulky insulation or any need for a water jacket. The A-758™ lime slaker takes about 20% less floor space than other designs.
More Reactive Hydrate Particles
The intense heat [>82° C(180° F)] generated by the 2:1 slaking ratio subjects the quicklime to steam penetration. The resulting internal pressure promotes the fracturing of the quicklime into smaller, highly reactive particles. This means more surface area for more efficient lime usage.
Controlled Consistency
An automatic, torque-actuated water inlet valve provides precise, continuous control of paste consistency and, therefore, the slaking process. Variations in lime quality and feed rate are quickly recognized and the optimum slaking rate is maintained, without operator intervention.
Integrated System Design
The pre-engineered A-758™ lime slaker system is available with a broad range of capacities, capabilities and control options:
• Four different capacities from 450 to 3600 kgs/hr (1000 to 8000 lbs/hr)
• Specific gravity classification or screen-type grit removal technology
• Gravimetric or volumetric belt-type lime feeders or screw-type lime feeder
• PLC or relay logic controls with an optional automatic batching function
Please contact us here for more information on our Lime Slaker Systems, product specifications, or a customized project quote or chat with us now by clicking on the chat icon in the bottom right.
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