The Powerfeed - Liquid feeding technology
EXCELLENCE MADE TO LAST
THE POWERFEED
LIQUID FEEDING
TECHNOLOGY
P16_01_2019
2
The Powerfeed is used for feeding solids into biogas plants. The liquid
feeding technology feeds the biomass in doses into a flow pipeline in the
fully enclosed system.
Tanks of any number and of different heights can be fed by means
of a Powerfeed.
POWERFEED FAMILY
ECONOMIC LIQUID FEEDING
TECHNOLOGY
Inside the Powerfeed the biomass is compressed and broken down very finely before it is fed into
the system. This concept releases any trapped air from the biomass. The fine biomass particles
have a large surface and ensure a higher gas yield.
The homogeneous mixture of recirculate and solid particles being fed as well as the release of
trapped air ensure that hardly any floating layers are formed and the agitating effort in the tank is
reduced, thus saving agitation energy.
The Powerfeed is available in four different versions and multiple sizes to provide the most
economic and suitable technology for every plant size.
Powerfeed duo
Powerfeed twin
Powerfeed connect
Powerfeed
+
less quantity of trapped air
less buoyancy of the biomass
less agitating effort
less power consumption
BENEFITS
3
FEEDING ANY NUMBER OF TANKS
The Powerfeed (A) and a high-capacity biogas pump (B) form the central unit of the liquid
feeding technology. The tanks of the biogas plant are connected to the pump via pipe and
valve systems, so that the pump can extract recirculate from the requested tank.
The Powerfeed is installed at an appropriate position in the pipe system. The Börger feeding
technology feeds the biomass in doses into the flow pipeline in the fully enclosed system.
The recirculate enriched with biomass is conveyed into the requested fermenter.
This enclosed system provides significant advantages:
no open gas-emitting liquid
no unpleasant odor emission
no gas leakage
Upon request, Börger control technology coordinates the operation of the pump and the
Powerfeed – simple and reliable from a single source.
A
B
POWERFEED
AT A GLANCE
+ tanks of any number and of different heights can
be fed by means of a Powerfeed
+ the enclosed system prevents odor emission and
possible gas leakage
+ the Powerfeed breaks down the biomass into ultra-fine
particles; due to the large surface of these particles a higher
gas yield can be realized
+ because trapped air is released from the biomass
less floating layers form in the tank, which results in
energy savings due to reduced agitating effort
+ simple retrofitting possible
in every biogas plant
1
2
5
3
4
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The Powerfeed twin feeds large quantities of varying biomass in
an enclosed system, safely and without odors, into your biogas
plant. The liquid feeding technology is equipped with an integrated
macerating unit and thus ensures a higher energy availability of the
biomass and, at the same time, less agitating required in the tank.
POWERFEED TWIN
TWO FUNCTIONS IN ONE DEVICE
The Powerfeed twin technology was developed to be able to feed any kind of biomass.
Moreover, in the Powerfeed the biomass is pre-shredded and defibered in a compressed
state. The benefits are obvious. Not only the acquisition, installation and integration costs
but also the current energy costs of a separate macerator are eliminated. In addition to
that, integrating a macerating function into the feeding technology makes daily operation
a lot easier.
OPERATING PRINCIPLE
The biomass introduced is collected by augers (1) and fed to the compactor unit (2). The screw spindle unit (2) which
seals in every position conveys the biomass into the press channel (3). A replaceable narrowing is attached to the outlet
side of the press channel. Combined with the screw spindle unit, strong compression is achieved in the press channel.
The forming plug serves as a seal and offers additional protection.
The structure of the biomass is changed by the friction generated by the pressing procedure and trapped air is released.
Material disintegration can be increased if the optional macerating tools (4) are screwed onto the rotating shafts.
The press channel leads to the induction unit (5) where rotating blades scrape solid particles from the plug. The solid
particles are fed into the recirculate by means of rotating agitator blades. The release of trapped air, the small size of the
solid particles and the careful dosing into the recirculate ensure that hardly any floating layers are formed in the fermenter.
The agitating effort is significantly reduced and the power consumption decreases. In addition, the large surfaces of the
solid particles ensure a higher gas yield.
A
B
5
Before
Afterwards
EFFICIENT DEFIBRATION OF THE BIOMASS
The Powerfeed twin is equipped with an integrated macerating function.
In the press channel the biomass is strongly compressed and pushed axially
into the direction of the cone-shaped narrowing. In this section, optionally two
to six macerating tools can be screwed onto the rotating shafts which defiber
the biomass. The large surfaces of the defibered biomass particles result in an
improved energy availability. In addition, the compression and defibration mini-
mize the quantity of trapped air. This means less buoyancy, less floating layers
and, as a result, less agitating in the fermenter.
UNIQUE EASE OF MAINTENANCE
The Powerfeed twin is maintained at the installation site of the feeding
technology without the need to remove piping or the drive system.
Easy opening of the quick-release cover (A) and the lateral maintenance
opening (B) enable the operators...carry out the maintenance work by
themselves, easily and quickly.
+
less quantity of trapped air
less buoyancy of the biomass
less agitating effort
less power consumption
BENEFITS
6
The Powerfeed technology stands for safe and reliable ”feeding“ of
biogas plants with solids. The liquid feeding technology is available in
two sizes and three versions.
THE POWERFEED
SOPHISTICATED QUALITY
Whether feeding is requested from the right or left, from the top or in combination with a
stainless steel storage container, the Powerfeed can be adapted perfectly to almost any
local conditions. When retrofitted, it can be connected to existing systems and technology
without problems.
OPERATING PRINCIPLE
Through the inlet opening (1) the discharge auger of a mixing dosing feeder or
a moving floor feeds solid biomass to the Powerfeed connect.
The auger (2) in the Powerfeed transports the biomass to the press channel (3) where
the biomass is compressed and trapped air is released. A plug is formed. The press
channel leads to the induction unit of the Powerfeed where rotating blades (4) scrape
solid particles from the plug. The ultra-fine solid particles are fed into the recirculate
by means of rotating agitator blades (5). The release of trapped air, the small size of
the solid particles and the careful dosing into the recirculate ensure that hardly any
floating layers are formed in the fermenter. The agitating effort is significantly reduced
and the power consumption decreases. In addition, the large surfaces of the solid
particles ensure a higher gas yield.
The quick-release cover (6) facilitates easy maintenance of the Powerfeed.
(MIP = Maintenance in Place)
Powerfeed connect
2
5
3
4
6
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CONTROL TECHNOLOGY
The Powerfeed is often supplied as a package with a rotary lobe pump and
the Borger control technology. This way, the customer receives a ready-to-
connect unit with high-quality components perfectly matched to each other.
Continuous measurement of flow rate, pressure and power consumption
enables the control technology to immediately react to changing conditions
and to adapt the operation of the biogas pump and the Powerfeed accord-
ingly. This ensures that the Powerfeed always operates at optimal capacity
and with the highest degree of operational safety.
LARGE NUMBER OF VARIANTS
While the Powerfeed connect is connected laterally to the discharge
auger of a mixing dosing feeder or a moving floor, the Powerfeed basic
model is fed from the top.
The Powerfeed duo is the efficient Börger feeding technology combined
with an intelligent stainless steel storage container.
Powerfeed duo
Powerfeed
1
+
less quantity of trapped air
less buoyancy of the biomass
less agitating effort
less power consumption
BENEFITS
EXCELLENCE MADE TO LAST
P16_01_2019
THE BETTER FEEDING TECHNOLOGY
Boerger, LLC | Chanhassen | MN 55317 USA | Phone +1 612 435 7300 | america
@
boerger.com | www.boerger.com