Fly/ Bottom Ash Handling system

 

Dry type Bottom ash conveyor (Drycon)

 

With environmental protection regulations getting tougher worldwide,

in order to save precious water, reduce emissions and return heat energy to the boiler resulting in lower coal usage, and so with lower costs for emission control, our dry bottom ash handling solution is established, and also offer you the benefits include the power consumption, protection of the environment (without large of ash pond and long transfer piping for storage), elimination of energy wastage from profitable ash quality and capitalizing on rising ash demand by industry, as well as profit from significant lower life-cycle costs compared to wet ash handling.

 

DRYCON can be retrofitted into existing applications where space is at a premium therefore contributing to the continued life span of the power generation facility.

 

The dry type bottom ash conveyor will be replaced the most of the wet type conveyor system applied from the coal-fired boilers or waste-to-energy plants. The equipment of revamping will be become the further important project to the power plant and many industry for application. 

 

Wet type bottom ash conveyor (SSC)

 

The traditional method of discontinuous ash removal, like with water-impounded hopper systems, should nowadays be no longer an option due to their many disadvantages and high maintenance demands.

 

If a decision is made to adopt wet bottom ash handling, we strongly recommend the continuous removal technology due to reduced water usage, power consumption, process complexity as well as lower operational and maintenance costs.

 

Our Submerged Scraper Conveyor (SSC) is used for the continuous removal of boiler bottom ash from conventional pf-fired boilers and is particularly suited when high ash rates and large lumps are expected. The SSC is capable of quenching and transporting over 100 tons/hour of ash and offers greater energy efficiency than hydraulic systems of comparable capacity.

 

The ash is transported using double roll crushers to feed the ash either to a slurry or disposal system, or onto belt conveyors for onward transfer. This technology can adopt single or twin hydraulic or electro-mechanical drives to suit the application or customer requirements. Trial assembly prior to shipment can ensure a seamless installation program avoiding timely delays in rework. Typical SSC installation

 

A heavy duty chain conveyor is submerged in a water trough below the furnace which quenches hot ash as it falls from the combustion chamber and removes the wet ash continuously by a de-watering slope before onward discharge into mechanical conveyors or directly to storage silos.

 

Slide discharge gates can be optionally fitted depending on the application requirements and removable or static conveyors can be engineered to suit boiler geometry or operator requirements

 

 

Fly Ash Material Handling

 

We serve the power industry worldwide with conveying systems for bulk materials such as ash, coal, sand and limestone, complimented by our injection and air pollution control technology. Our specialized expertise in pneumatic conveying utilizes both positive and negative pressure, dense and lean phase conveying techniques.

 

The Dense-Phase family offers solutions for different applications handling of fly ash from electrostatic precipitators filters, fabric filters, economizers, and air heater hoppers can be carried out by using one of our Materials Handling specifically designed pressure vessel systems to convey the material up to and above 1000m into a storage silo.

 

Our Dense-Phase family provides a range of pressure pneumatic conveying system. The Dome Valve® pioneered the use of an inflatable pressure tight seal arrangement that became its hallmark.

 

The Dome Valve® commonly provides up to 1,000,000 machine operating cycles between major overhauls with the only maintenance generally being a seal change once per year. Totally unrestricted bore material flow is assured throughout the full range of 50-500 mm diameter by the unique design of the ‘dome’ assembly. This eliminates the common problems of bridging and blocking.