Lime Slakers
Detention Slaker
Detention slakers are used to produce lime slurry for a variety of industrial applications including water treatment, flue gas treatment, and chemical manufacturing. In a detention slaker, quicklime (calcium oxide) is combined with water and thoroughly agitated to create a highly reactive hydrated lime slurry (calcium hydroxide). Unlike in batch processes, detention slakers can produce a continuous supply of lime slurry for use in downstream processes.
When operating a detention lime slaker, research has shown that for any given quicklime source, lime slaking temperature control is the single most important factor influencing the reactivity of the final lime slurry. The chemical reaction of quicklime and water is exothermic, producing a significant amount of heat. While this heat accelerates the reaction and helps make the slaking process faster and more efficient, proper temperature control is crucial to prevent overheating. By monitoring the temperature of the slurry and automatically adjusting quicklime and water inputs to maintain an optimum slaking temperature between 175°F and 185°F (79.4°C and 85.0°C), detention slakers are able to better adapt to fluctuations in lime reactivity and produce a more consistent, higher-quality lime slurry.
Compared to other lime slaker types, detention slakers are moderately sized, relatively inexpensive to install, and have a high ability to be optimized. They are well-suited to applications where lime quality is reliable, and a continuous flow of lime slurry is needed.
Why Use the ZMI Portec Lime Slaker from Carmeuse Systems?
Versatile
The ZMI Portec Detention Slaker from Carmeuse Systems can slake quicklime, as pebble or fine lime, up to ¾” and handles water with moderate impurity levels without issues. ZMI Portec lime slaking systems can produce lime slurry in and around 25% solids.
Safe
Our ZMI Portec Detention Slaker is outfitted with a horizontal agitator to break the slurry surface as it mixes. While this helps to ensure complete mixing of the water and quicklime, it also allows for safer operation by minimizing hot spots and preventing the formation of a dangerous lime cap along the surface of the lime slurry. Additional enhancements like our wetting bowl and forced draft wet scrubber further increase safety by reducing dusting in the shop.
Efficient
Overall, the ZMI Portec line of detention slakers helps to optimize lime usage. Vigorous agitation of the slaking chamber ensures no dead spots during lime slaking, and our detention slakers feature an external water jacket, which preheats incoming water, reducing the need for separate pre-heaters.
Automated
By implementing our programmable logic controlled (PLC) system, our ZMI Portec Detention Slakers can respond to changes in lime quality and feed rate via integrated automated controls. This minimizes the manpower needed to monitor the system and increases productivity by automatically monitoring input and outputs and adjusting accordingly.
For more information about our line of ZMI Portec Detention Slakers, or to learn about system upgrades and enhancements for your detention slaker, contact our team.
Documentation
Documentation
For additional information or to discuss your requirements with our sales group, please contact us.
Features&Benefits
Features And Benefits
| Features | Benefits |
|---|---|
| Horizontal rake type agitator | Ensures complete mixing of water and lime, preventing hot spots and maximizing lime usage |
| External water jacket | Preheats incoming water reducing the need for pre-heaters saving on energy costs |
| Round shape of the barrel bottom | Turns over lime due to paddles’ close contact with side walls ensuring thorough mixing |
| Wetting bowl | Creates a water curtain around the dry feed stream preventing lime buildup and upstream plugging increasing efficiency |
| Forced draft wet scrubber | Removes dust and steam saving money on wasted lime and maintenance |
| Stub shaft to agitator shaft connection | Reduces seal packing wear, extending shaft life and decreasing replacement costs |
| Efficient solids and grit handling | Minimizes settling resulting in a highly reactive slurry |
| Slaking chambers separated by baffles | Prevents lime short circuiting ensuring fully slaked lime at the outlet |
| Wear liner in slaking zones | Protects the life of the slaking body and is replaceable extending the slaker life cycle |
| External agitator shaft bearings | Minimizes wear and tear due to no contact with lime slurry extending product life |
| Asymmetric packing type seal arrangement | Reduces seal leaks and extends the shaft life improving safety and saving money |
| PLC control system option | Provides a safe and trouble-free operation maximizing productivity |
Capabilities
Capabilities
For over 50 years, Carmeuse Systems has been providing slaking systems and other equipment solutions to our customers across various industries. Whether you are looking for a new detention slaker or to retrofit or upgrade an existing system, our knowledgeable teams work with you to develop a solution that aligns with your needs, application, and budget. In addition to detention slakers, we also offer a range of other slaker types, and components such as hoppers, feeders, and bulk chemical storage solutions.
Specifications
AVAILABLE SIZES
Our ZMI Portec line of detention slakers are available in a range of models, capable of processing between 1,000 lbs to 26,000 lbs of dry quicklime per hour. Models include:
| Model | Capacity of Quicklime | Volume (US gallons) |
|---|---|---|
| M-5 | 1000 lbs/h | 90 gal |
| M-15 | 2500 lbs/h | 210 gal |
| M-25 | 5500 lbs/h | 450 gal |
| M-40 | 9000 lbs/h | 720 gal |
| M-55 | 12500 lbs/h | 990 gal |
| M-60 | 16000 lbs/h | 1360 gal |
| M-90 | 26000 lbs/h | 1950 gal |
PROCESS REQUIREMENTS
In terms of water to lime ratios, our detention slakers typically operate at a 4:1 ratio and utilize temperature control for managing the water and lime feeds.
- Calcium Oxide: Min 75% CaO available
- Feed Particle Size: Max. ¾” [19 mm]
- Water Supply: Min. pressure of 40 psig [276 kPag]
For additional specifications see the ZMI Portec Detention Slaker data sheet.
End-2-End Support
When it comes to detention slakers, Carmeuse Systems is your go-to solution provider from End-2-End. As part of Carmeuse, we understand the systems necessary to handle quicklime effectively but also the intricacies of the raw material itself. Carmeuse is a leading provider of lime and limestone products and through our End-2-End Services, we support customers from the mines where the raw material is produced through to the point of application.
The benefits of working with Carmeuse Systems includes:
- Expertise in Lime and Limestone
- Engineering and Design Expertise for Complete Lime Handling Systems
- Component Parts to Integrate into Existing Applications
- System Retrofits and Upgrades
- Maintenance and Replacement Parts at the Ready
- Access to Experts to Diagnose System Issues and Improve Efficiencies
- Laboratory Services through our Innovation Center
Learn more about our End-2-End Services.
