Boerger Multicrusher
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Max. Capacity 320 m³/h
Boerger Multicrusher
The Multicrusher is an effective, universal chopping unit for use with liquids containing solids.
The Multicrusher reliably chops coarse material such as fibers, wood pieces, plastics, membranes, textiles and many more and ensures that downstream machines and pumps operate smoothly. The Multicrusher homogenizes the medium thereby facilitating the pumping process.
Benefits of the Börger Multicrusher
Different rotation speeds of the shafts and blades achieve optimum cutting and self-cleaning results.
Thanks to the range of different sizes, variable blade configurations and optimum rated speeds, the machine can be adapted to handle almost any application.
The Börger Multicrusher can handle various materials, including corrosive liquids and can also be used with sea water. So the design completely meets the specific requirements of the application.
Whether it is a stand-alone machine or connected to a pump, a submersible model or a mobile unit, the Boerger Multicrusher is as individual as your requirements.
Specifications
Operating Principle of the Boerger Multicrusher
The Multicrusher is a chopping unit with a powerful intake function.
The twin-shaft chopper was designed using the principle of the rotary lobe pump.
Instead of the rotating lobes, this machine has interconnecting cutting blades set on the hexagonal carrier shaft and is attached with a central bolt. The different rotation speeds and blade configurations ensure excellent chopping yields. The benefits of MIP are proven once again with the quick-release cover.
Rated capacity volume up to 320 m³/h (1,400 usgpm/h)
Can be installed on suction or pressure side
Features
The components and technical design
| 1 | Quick-release cover | The cover to the interior of the Multicrusher allows quick access to all wetted parts. |
| 2 | Axial casing protection | The medium flows through the interior of the casing and is fitted with an axial protective cover. |
| 3 | Blades | The Multicrusher is designed so that you can choose which way the pumped medium flows by inserting the individual blade disks and defining the direction of rotation of the shafts. Various blade widths and cutting profiles determine the final cutting yield. The central fastening screws hold all the blade disks in position. |
| 4 | Shaft seals | Simply ideal. The space here allows the proven mechanical seal to be fitted without having to fully dismantle other components. No pipe line dismantling, no drive dismantling. |
| 5 | Block casing | The casing is a single-piece block casing made of gray cast iron or stainless steel. |
| 6 | Quench and control chamber | Added control and lubrication fluid have both a monitoring and lubricating function. Leakages in the upper overflow area indicate any unwanted seal defects in the upper overflow area. This ensures that contaminated liquid cannot penetrate the gear unit. |
| 7 | Carrier and reducer gear |
This is a very solid design. Extra large gears and bearings guarantee the overhung bearing system runs smoothly for a long time. |
ATEX
The ATEX Directive 94/9/EC defines the prescribed technical requirements for equipment and protective systems intended for use in potentially explosive atmospheres in Europe. All Boerger Multicrushers can be used in potentially explosive atmospheres in accordance with the ATEX Directive.
Air Pollution Control Act
The technical guideline for air quality control is the German government's “first general administrative regulation under the federal air pollution control act”.
The Multicrusher can be built to be used for lawfully handling toxic and highly toxic media in accordance with the Air Pollution Control Act.
Options
Blade configuration
9 different blade options.
The degree to which the Boerger Multicrusher cuts is determined by the choice of blade configuration, the teeth profile, the blade width and the speed of rotation.
Currently, a choice of 9 different blade configurations can be selected depending on the application. The variable rotation speed of the shaft creates a tearing/cutting action. The use of hardened steel ensures the blades stay sharp longer.
Materials Available
Lists of materials available for Börger Multicrushers
The carrier and reducer gears of the Börger Multicrusher are protected and safely separated from the chopping chamber by the quench-filled intermediate chamber.
The high-strength shafts do not come into contact with the pumped medium in Börger Multicrushers. The wide range of materials available allows optimum adjustment to individual needs.
Selection of materials available
Blades
Blades from surgical stainless steel 1.7218
Case Studies
Multicrusher
Whether you integrate the Multicrusher in a pump system or use it as a separate unit – its versatility is unrivaled! Quick access to the blade configurations means blades can be selected according to the situation and therefore provide variable cutting quality. The particle size required is defined by the choice of all the different blade configurations, teeth profiles and blade widths.
The Multicrusher was based on the design of the Börger Rotary Lobe Pump. Therefore you have the same variety of seals to choose from as the Börger Rotary Lobe Pump. Börger Multicrushers are customized for all types of applications.
The industries and applications listed here are just a sampling of the diversity of Börger Multicrushers.
Primary sludge
Primary sludge
The dry substance content had increased due to a certain process at a waste water treatment plant. Since then, faults had occurred at several points in the pump due to solids accumulating and blocking the pumps. The blockages were causing frequent damage.
After successfully conducting different tests, they opted for the Boerger Multicrusher for dealing with the primary sludge. The Multicrusher was installed on the suction side of the two primary sludge pumps which transfer the sludge alternately.
Operating safely chopping performance and the reasonable wear parts were decisive in convincing the waste water treatment operator. Since the Multicrusher was installed, the primary sludge pumps have been running smoothly.
Technical data
| Macerator | Multicrusher |
|---|---|
| Medium | Primary sludge |
| Throughput volume | 40 m³/h (176 usgpm/h) |
| Speed | 120 rpm |
Digested sludge
Digested sludge
Contaminated sludge is delivered by tanker to a waste water plant which is then treated in the facility. The sludge is conveyed under pressure from the tanker into the plant. Due to the very low pressure, solids in the sludge persistently stick in the pipe line and cause it to block.
To chop these solids and prevent more blockages, the operator of the waste water treatment plant installed a Boerger Multicrusher. The Multicrusher is mounted on a hand cart and equipped with a small rock trap for extracting non-floating solids (such as metal parts) and is connected between the tanker and treatment plant.
Since the operator has been using the Boerger Multicrusher, there have been no more incidents due to pipe blockages when discharging from the tanker.
Technical data
| Macerator | Multicrusher |
|---|---|
| Medium | Digested sludge |
| Throughput volume | 30 - 60 m³/h (132 - 264 usgpm/h) |
| Speed | 100 rpm |
Pumping facility
Pumping facility
A treatment facility was experiencing persistent problems with a rotary pump in a pumping station.
The communal waste water is collected in a sedimentation tank. Here the heavier solids fall to the bottom and are removed. A rotary pump conveys the waste water from the tank to a water treatment facility. However, the waste water still contains solids in the medium that kept blocking the rotary pump. A solution was needed. A Börger Multicrusher was chosen and installed between the sedimentation tank and the rotary pump. Since the Multicrusher has been installed, pump downtime caused by solids has not occurred.
Technical data
| Macerator | Multicrusher |
|---|---|
| Medium | Waste water with solids |
| Throughput volume | max. 300 m³/h (1320 usgpm/h) |
| Speed | 100 rpm |
Tar pits
Tar pit
Highly viscous sludge deposits had to be removed from a tar pit. The problem with the pump systems already in use was the fluctuating viscosity of up to 50,000 mPas due to the temperature and the sometimes very large particles contained in the sludge. Both these factors kept causing the pumps to block.
The solution was the Boerger double-pack consisting of a Multicrusher and a Rotary Lobe Pump. The two units were combined in one frame and both operated using a single hydraulic motor. The entire unit is ATEX compliant and is operated immersed in the pit.
Technical data
| Börger | Rotary Lobe Pump |
|---|---|
| Macerator | Multicrusher |
| Medium | Tar sludge |
| Rated capacity | 5 - 25 m³/h (22 - 110 usgpm/h) |
| Pressure | 2 - 8 bar (29 - 116 psi) |
Fish remains
Fish remains
In the cement industry, many different materials and substances are used to fire the furnaces. A Japanese cement manufacturer fires its rotary kilns by incinerating fish. In fact, this is the by-product and remains of fish which are not sold and not economically viable.
The fish have to be chopped so that they can be burned effectively. The Japanese cement manufacturer was looking for a chopper to do this. After performing various tests with products, they decided on a Boerger Multicrusher.
The customer was impressed with the excellent chopping yield and particularly with the Multicrusher's ease of maintenance. Wear parts could be replaced by the customer's in-house maintenance staff directly at the installation site without dismantling any pipe or drive systems.
Technical data
| Macerator | Multicrusher |
|---|---|
| Medium | Fish remains |
| Soild share | 20 % DS |
| Speed | 130 rpm |
