Double Membrane Biogas Storage Tank Mounted or … 01 08 BGAP 2014 Presenta… · Double Membrane Biogas Storage Tank Mounted or Ground Mounted? A comparative approach ... a floating

Double Membrane Biogas Storage Tank Mounted or Ground Mounted?

A comparative approach

Biogas Asia Pacific Forum 2014 2 – 4 June 2014, KL

Matthew Dickinson – Operations Director

www.biodome-asia.com


Established in 1907 as a traditional Steel Fabricators Merged with the Water Industry in 2003 with current directors and owners Additional offices opened locally to the workshop in 2005 In 2008 moved into Far East market Over 100 years of continuous trading and growth founded on excellent reputation for quality

service Evolving from a traditional steel fabrication background to be the leading contractor for AD

and Biogas infrastructure Over 100 skilled personnel employed through proposals, engineering, manufacturing and site

installations Head office near Manchester, United kingdom, a modern 15,000ft² manufacturing facility with

a 10,000ft² expansion in June 2011


OUR MISSION

KIRK GROUP aim to be recognised as the leading global specialist, design & build partner for Anaerobic Digestion & Biogas infrastructure; working in partnership with industries leading specialist technology providers to deliver projects utilising ‘biowaste’ for the production of biogas as a renewable energy source. We are committed to the promotion and development of AD & Biogas technology to reduce the effects of climate change, eliminate useful waste being diverted to landfill, promote energy security and secure existing fossil fuel resources. We recognise the huge range of benefits (environmental, social and economic) that biogas production & utilisation can bring and are committed to being instrumental in delivering a safe and secure renewable energy network for future generations


GLOBAL REFERENCES

Project Installations Europe, UK, North America, Australasia, & Asia


GLASS COATED

STEEL TANKS

ACCESS

STEELWORK

BIOGAS

STORAGE

EPOXY COATED

STEEL TANKS

CONCRETE

TANKS

PRODUCT PORTFOLIO


CSTR - Digester designs


BASIC PRINCIPLES OF OPERATION

The outer membrane is designed to resist external wind forces

AIR BLOWER



When gas production exceeds the rate of use, the internal membrane inflates

Gas in Gas out

Air Blower



When gas usage exceeds the rate of production, the internal membrane deflates.

Air Blower

Gas in Gas out


BIODOME SYSTEM – ENGINEERING OVERVIEW – EXTERNAL VIEW

ULTRASONIC DETECTOR

AIR INLET CONNECTION

Y-PIECE

AIR BLOWERS

NON RETURN VALVE

AIR EXHAUST CONNECTION

®


BIODOME SYSTEM – ENGINEERING OVERVIEW – SECTIONAL VIEW

OUTER MEMBRANE

INNER MEMBRANE

BASE MEMBRANE

CLAMPING RINGS

OVER PRESSURE VALVE

VENT STACK

®

CLAMPING RAIL


BIODOME® SYSTEM – ENGINEERING OVERVIEW The outer membrane is a permanently inflated structure. The membrane is inflated by the use of the electrically operated blowers.


When gas production exceeds the rate of use, the internal membrane rises When gas usage exceeds the rate of production, the internal membrane falls The air pressure inside the air compartment maintains the system pressure


The blowers ensure that the membrane remains fully inflated under all conditions of gas filling and consumption. This requires the blower to be rated at 140% greater throughput than the

maximum gas consumption rate of the plant.

Air Exhaust Nozzle

Pressure Regulating Valve

Clamping Angles

Tank Top Angles


External Membrane

Air Inlet Nozzle

Air Support Blowers

‘Y’ Piece

Over- / Under- Pressure Relief Valve

Viewing Port


The membrane form is achieved by

precisely cutting the textile roll to accurate design patterns.

These patterns are based on over

20 years experience of the behaviour of the textile under pressurised conditions, and have become a very specialised shape to ensure even stress distribution throughout the structure.

MEMBRANE MANUFACTURE


TYPICAL AD PLANT SCHEMATIC

The ground based BIODOME® is placed on a concrete base with pipe work cast into the base

GFS Digester with Fixed Roof Digestion & Biogas production

BIODOME® Gas Holder Biogas Buffer/Storage

FLARE CHP ENGINE

HEAT / POWER

The gas holder must be installed ‘in-line’ between the digester and the gas consumption equipment; this ensures a constant flow of ‘fresh’ biogas through the Gas Holder and eliminates the risk of biogas stratification.


BIODOME® AD PLANT SCHEMATIC

Placing our BIODOME® on top of the digester provides major benefits such as; No concrete base required, no additional pipe work, space saving and no steel roof on tank. Generally this option will save a significant amount of capital costs.

The BIODOME® is situated directly above the gas production to provide a buffer storage volume between production and usage.

HEAT / POWER


The gas holder must be installed ‘in-line’ between the digester and the gas consumption equipment, ensuring a constant flow of ‘fresh’ biogas through the gas holder and eliminates the risk of biogas stratification.

Pressure drop across each section of the plant is directly related to the size and length of the pipework, number of valves and fittings through which the gas must flow. The BIODOME is the pressure input to the gas system, resulting in the digester pressure being higher and all downstream equipment being lower.

Digester Distance

®


BENEFITS OF DOUBLE MEMBRANE BIOGAS STORAGE SYSTEMS Enhanced safety with biogas storage with double layer of same-strength membrane Positive header pressure acting on inner membrane allows easy drawing of biogas,

eliminating vacuum situation in fixed roof applications System equipped with back-up blowers, methane gas detector & over/under pressure relief

valve to ensure system safety Long lifespan with UV resistance, H2S resistance & anti-static coating


BENEFITS OF INTEGRATED SYSTEMS Significantly reduced CAPEX price

No steel roof No extra foundations No extra pipework No separate gas buffer

Further reduced project footprint Maintain operational performance Biogas buffer for gen-sets Low maintenance Long product lifespan Greater flexibility with design


BIODOME® GAS HOLDERS Available as stand alone system or rim mounted onto existing storage / digestion tanks

Each system specifically designed to meet process and environmental requirements

Rapid on-site installation using specially trained teams


BIODOME MEMBRANE SPECIFICATIONS & QUALITY

• The membrane is designed to DIN codes for air supported structures.

• Both the inner & outer membrane have UV protection and has an additional

anti-static coating.

• The coating is also a treatment for protection against sulphur found in biogas.

• The membrane is specified for a low methane permeability of 165ml/m2/day/bar pressure.

• BIODOME uses the strongest textile membrane currently commercially available.

• We supply the same strength textile fabric for both inner & outer membrane.

• Total traceability is maintained for every metre of membrane weld for our quality records.

INNOVATION AND SPECIAL PROJECTS

Hogsmill STW

Project Details: Supply of 2-off Top Mounted BIODOME® Double Membrane Gas Holders Installed on 2-Off existing Ø30m Concrete Settlement Tanks for conversion to digesters. Operating pressure 25mbar and safety blow-off pressure of 30mbar. Height restriction of storage above tank is 6m.


Beddington STW

Project Details: Supply and installation of a Top Mounted BIODOME® Double Membrane Gas Holder onto an existing concrete tank 22mØ. Solution is to replace a floating steel roof and must incorporate 2 Stainless Steel platforms for access inside the tank



DOUBLE MEMBRANE BIOGAS HOLDER COVERS

Dual cover for in-ground lagoons or ponds Traditionally single membrane covers without rain drainage, resulting in pooling & also

prone to leakage and accidents Double membrane solution allows safety & operational advantages for in-ground

ponds, like the above-tank application Perfect for existing lagoons which are now under regulation pressures to cover &

capture methane


TOP MOUNTED BIOGAS HOLDER ROOFS Dual-purpose of roof cover & biogas storage Eliminating need for fixed steel roof, lowering CAPEX Operational advantages with positive header pressure for downstream usage Flexible to be increased for extra storage space UV-resistant, H2S resistant & can withstand elements (high wind speed & snow loads) Suitable for retrofitting of existing tanks


WORLD GALLERY


WORLD GALLERY


Enquiries:

BIODOME ASIA A-07-05 Office Tower

Empire Subang

Jalan SS16/1, Subang Jaya

47500 Selangor, Malaysia


THANK YOU & CONTACT US:

http://www.biodome-asia.com/



Documents

Double Membrane Biogas Storage Tank Mounted or … 01 08 BGAP 2014 Presenta… · Double Membrane Biogas Storage Tank Mounted or Ground Mounted? A comparative approach ... a floating