Dav Pillow

BULK SOLID
HEAT EXCHANGER

BULK SOLID HEAT EXCHANGER

Heat exchangers are commonly associated with liquid or gaseous fluids, but what if the fluid is actually “solid”? Cooling the sands of a foundry or heating grains are processes that require bulky machinery and generate a lot of dust. DAV Pillow exchangers for bulk solids overcome these technologies by exploiting a physical principle that is as simple as effective: gravity!

pillow plate per fluidi solidi di Dav Pillow
scambiatori termici pillow plate di Dav Pillow

HOW DOES
IT WORK?

HOW DOES IT WORK?

Pillow plates are thin plates with smooth surfaces. By placing them side by side, at the right distance, are created cavities in which granular or powdered solids such as chemical components, sands, seeds, pellets, etc. can flow downwards by gravity alone. Liquid or gaseous thermal fluids (water, thermal oil, steam or refrigerant gases) flow inside the pillow plates, which, depending on the need, transfer or absorb heat to the product. Unlike traditional systems such as fluidized bed ones, bulk solid heat exchangers directly control the temperature of the granular solids, have a very small footprint on ground and do not require filtration systems for the dust that is raised during the process. The use of pillow plates also offers significant advantages in terms of maintenance.

THERMAL
ENERGY RECOVERY

THERMAL ENERGY RECOVERY

Subtracting 700 degrees Kelvin from foundry sands is necessary to allow their reuse, but it also involves the recovery of enormous quantities of thermal energy that can be used in other processes, with great savings and reductions in emissions into the environment. The same concept can be applied to any other process that cools bulk solid, also letting DAV Pillow to work as an economizer.

scambiatori termici pillow plate di Dav Pillow

APPLICATIONS

WHY CHOOSE IT

Pillow plates provide a large surface area for heat transfer, allowing for efficient and rapid heat exchange between the bulk solid and the heat transfer fluid (e.g., water, steam, thermal oil). This results in faster heating or cooling of the bulk solid, reducing processing time and increasing overall productivity.

Pillow plates can be customized to meet specific process requirements. They are available in various shapes and sizes, making them suitable for different applications and industries. The versatility of pillow plates allows for the design of heat exchangers that precisely match the needs of bulk solid handling processes.

Pillow plate heat exchangers have a compact design, which helps save valuable floor space. This is especially important in industrial settings where space optimization is crucial for efficient production.

The smooth surface of pillow plates minimizes the accumulation of bulk solid particles, reducing fouling issues that can impede heat transfer efficiency in traditional heat exchanger designs. This characteristic leads to much longer operating periods between cleaning or maintenance cycles.

Pillow plates are typically easy to access and clean. Their construction allows for effective cleaning, preventing cross-contamination between different bulk solids and ensuring product purity.

Different bulk solids have unique characteristics that affect their heat transfer requirements. DAV Pillow heat exchangers can be designed with specific configurations to accommodate variations in particle size, density, flow behavior, and thermal properties of different bulk solids.

Allow precise control over the temperature of the bulk solid during processing, ensuring that the material is treated at the desired temperature range for optimal quality and consistency.

Pillow plate heat exchangers are more energy-efficient than other heat exchanger types, contributing to lower energy consumption and reduced greenhouse gas emissions.

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