CHP Power Plants

1. Feed of fuel at biomass power plant

The conveying screw from Spanner Re² automatically transports the fuel (biomass) from the fuel bunker to the biomass power plant. An integrated metal interceptor in the fuel sewer port separates foreign material. A second conveyor screw transports the biomass to the reformer of the wood gasifier unit.

2. Reformer in wood gasifier for clean wood gas

The reformer is the heart of the biomass power plant. It produces almost tar-less wood gas from biomass in a controlled process, which works on the downdraft principle: the wood chips and the wood gas moves in the same direction. The innovative structure of the reformer offers high fuel flexibility. Using a compact fire bed with temperature monitoring, we guarantee a regulated wood gas production that ensures the efficiency of our biomass power plant. With our patented and proven biomass gasification technology we produce an extremely clean wood gas, which we can prove.

3. Wood gas filter at wood gasifier unit

The produced wood gas is cooled by the heat exchanger and passes through a wood gas filter with integrated self-cleaning at the gasifier unit. Spanner Re² biomass power plants have a second wood gas filter (emergency filter) for optimal plant secure. The cooled wood gas passes through two filter systems, before it drives a powerful engine, which produces the electricity and heat. 

4. Efficient wood gas CHP

The solid gas engine burns the wood gas and converts the energy of the wood gas into kinetic energy. A powerful natural gas generator transforms the rotation into electricity. In addition the wood gas CHP produces heat, which makes the whole process highly efficient.

The wood gasification container solution enables a decentralised generation of electricity and heat using local wood, tailored to your needs. 
The EnergyBlock from Spanner Re² is unique to the bioenergy industry. It is a perfectly coordinated complete system, consisting of a wood gasifier unit, a combined heat and power unit (CHP) and intelligent control system. Compact in 20- or 40-foot containers, all components are pre-installed and perfectly adapted to your individual requirements. This not only simplifies the installation, but also allows extremely fast start up, so you can benefit straight away. The system offers huge flexibility due to it’s modular design and ability to cascade the biomass power plants for maximum performance.  The EnergyBlock can be optimally adapted to suit your unique situation and environment. Further customisation is enabled by the wide range of the power spectrum. The turnkey wood gasifier container solution can be operated with wood chips, pellets or briquettes.

Off-grid & diesel generator replacement with turnkey wood gasifier container solution

The demand for an innovative energy technology in the renewable sector is becoming even more relevant due to the continuing rise in electricity costs, fossil fuel dependency and limited regional supply options. The Re² EnergyBlock offers an excellent opportunity to replace existing expensive electricity from diesel generator units.
Especially in isolated regions in New Zealand, our EnergyBlock is the ideal off-grid solution for generating an environmentally friendly energy supply where its needed the most. Our patented biomass gasification technology uses the energy from the sun which is stored in the wood and at the same time is adding value because the wood stays locally in the region.

EnergyBlock - the turnkey wood gasifier container solution in the overview:

• Complete solution for electricity and heat generation from biomass
• Can be fueled with wood chips, pellets and briquettes
• Off-grid & on-grid operation possible
• Easy installation by factory pre-assembly
• Quick startup 
• Compact, space-saving design

Here are some examples of use cases: 

• Farms
• Sawmills
• Bioenergy villages
• Off-grid areas
• Heating plants
• Local heating networks
• Industrial plants

With our wood chip drying technology, the energy yield of the fuel can be significantly increased. Drying systems from Spanner Re² not only reduce the water content of the wood chips, it also minimise the fine fraction and mineral pollutions by integrated sieve elements. This means that you can refine almost any natural wood or wood wastes into a high-quality fuel. The processed material is optimally matched to the requirements of the biomass power plant and ensures a particularly efficient wood gasification operation. We offer various wood chip drying technologies - from fully automated wood chip dryers to simple wood chip drying systems with sloping ground dryer.

Fully automated wood chip drying with Spanner Re² push floor dryer

• Fully automated wood chip drying without "wet nests"
• Space saving through a compact and robust construction
• Adjustable residual moisture
• Easy access via control panel, PC or Smartphone
• Reduced dust development   

System included:

• Storage bunker
• Warm air supply
• Fine particle screening and fine particle removal
• Thrust conveyor technology with robust hydraulic system
• Feeding via conveyor belts or conveyor augers
• Technical room with intelligent control   

Technical data - wood chip drying systems: Typ 6SBT-5 / 6SBT-25 / 12SBT-25

Drying output per day:   Up to 5 – 35 m³ dried wood chips (depending on design and type of drying system, and also depending on wood chips quality (humidity))

Capacity storage bunker:   6 m:  ~  2-16 m³;      12 m: ~ 25 m³

Layer height of the wood chips:   0,4 m – 0,6 m

Dimensions:   6 m: 6 m x 2,4 m 2,6 m;      12 m: 12 m x 2,4 m x 2,6 m

Spanner Re² sloping ground dryer - flexible and cost-effective 

With the sloping floor dryer, the wood chips are distributed over a large area on an angled floor (angle approx. 40° to 45°). The slanted floor consists of air-permeable metal sheets.

The warm air flows through the air slits of the sheets from below, drying the wood chips above. The warm air can either be taken from the installation room of the wood gasifier system or generated by a heat exchanger. The heat exchanger can also be operated manually and, in the ideal case, is only switched on during the cold season (assuming that the sloping floor is directly connected to the plant room). The wood chips are distributed on the inclined floor with a front loader or wheel loader, for example. In the course of the drying process, wet wood chips can be re-layered from the bottom to the top or dry wood chips can be transported to a storage bunker for storage. The sloping ground dryer is a particularly cost-effective type of wood chip drying technology and it has more space available for storage and drying. Depending on the customer's request, the wood chips can also be removed via a screw conveyor.