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BIOMASS EXPLOSION & CONVERSION


exploded wood chip

Biomass Conditioning
Biomass Conversion
Dry Gas Explosion



Dove Thermal Engineering provides consult-design-construct services and forensic support in energy-related topics.

Biomass Conditioning

We apply conventional heat and mass transfer techniques to Biomass Conditioning, Torrefaction and Municipal Solid Waste – MSW – Processing. While landfill gases are relatively high level inputs toward a marketable biofuel, most organic feedstocks must pass through a series of drying and pre-treatment stages according to the intended product. Current emphasis is falling upon municipal solid waste to yield acceptable biomass conversion rates, whilst addressing disposal and public health issues. Biomass drying and biomass steam explosion stages are frequently close to the front end of these processes.

The effective pre-conditioning of biomaterials prior to bulk storage and their subsequent combustion cannot be over-stated, and is essential to satisfactory heating plant operation. Most importantly, humid content must be brought in-line with the boilermakers’ feedstock specification, and any conglomeration brought to size.

Derivatives of basic conditioning processes include SynGas (a mixture of carbon monoxide, carbon dioxide & hydrogen), biomethane and other methane-based products obtained from anaerobic digestion and landfill extraction. They are all classed as biogas, which may be consumed directly or passed to a biofuel plant for refining and conditioning. They are impure mixtures and not readily transportable but may be consumed on-site and directly linked to the application – usually i.c. engine-generators - from which power is exported to the Grid.

There is present emphasis on converting the 55% organic content of Municipal Solid Waste into biofuels or industrial chemicals. Cellulose-based material is preconditioned by biomass steam explosion, torrefaction, catalysis or simply conventional biomass drying, according to the route taken. It is then broken-down to form sugars by enzymatic or acid hydrolysis. Alternatively, ethanol may be derived from SynGas.


PAS      Valve 5


Steam Explosion

Dove Thermal is linked with various programmes for the refinement of plant and equipment serving the conversion chain: biomass drying and pre-conditioning processes, biomass steam explosion, hydrolyzation and ethanol extraction stages, and complete biofuel plant installations. We have our own patent-ready developments for continuous and batch-continuous ligneous steam explosion systems, and are seeking inward investment and partnering arrangements for the construction of commercial demonstration biofuel plant. Our high speed thermodynamic valves for accelerated steam explosion and blow-off (above) have radically improved food processing techniques.

 

Lab Autoclave 2      Scholtz


Ligneous Disruption

Herbaceous material will rupture upon rapid expansion from around 10 bar, particularly when composted or subject to acidic pretreatment. Preservation of fibrous structure generally entails some manner of extrusion – as had first been employed in the Mason Process. Effective disruption of ligneous material entails explosion from pressures in the order of 30 bar, for which specialist valving is needed to accommodate saturation conditions and blow-off rates. Our free piston blow-off valve is configurable in a range of bore sizes for variable and controlled opening profiles. Valve and reactor sizes are interdependent with respect to severity of the expansion process.


Dove Thermal Products

Coolant Management Modules; Drying Tunnels
Steam-Heated Calorifiers; Thermal Oil Heaters
Shell-and-Tube Heat Exchangers; HTF Heaters
Thermal Fluid Heaters; HTF-Heated Calandria
Packaged Quench Plants; Air Handling Units
Balance-of-Plant Modules; Cooling Tunnels
Packaged Plant Skid Mounts

Dove Thermal Services

Forensic Engineering; HVRAC Engineering
Thermal Design & Product Development
Consult-Design-Construct Services
Thermal Engineering Consultancy
Process Plant & Process Design
Thermal Fluid Heating Systems
Environmental Systems Design

Dove Thermal Engineering Limited, P.O.Box 5, Uttoxeter, ST14 8QX

Telephone: 01889 569933