Disposal and recycling

Old plastics are cleaned first of all and then chopped into pieces of approx. 5 – 10 mm. The chopped plastic is then made into a polyethylene granulate in a special procedure (at a temperature of 110 °C to a particle size of approx. 5 mm). This is used as a raw material in the manufacture of plastic pipes, buckets, toys, household equipment etc. At this phase, the granulate is malleable and easy to form due to the high temperature. To become sufficiently hard, the particles are cooled down to 20°C in a water bath.

A Boerger Rotary Lobe Pump ensures that the granulate keeps circulating in the cold water for approx. 20 min. to prevent the formation of any clumps when cooling down.

Technical data

The customer runs an amine recycling plant. The amine sulfate delivered is processed in a rectification system. Caustic soda reacts with the sulfuric acid contained in the amine sulfate. The result is a sodium sulfate solution which is pumped into a storage tank. The Boerger Protect Rotary Lobe Pump is used in the neutralizing process by adding sulfuric acid. The Boerger Protect pumps the sodium sulfate solution from the storage tank back to this storage tank. In the meantime, sulfuric acid is mixed in on the suction side. A pH value can be measured using a meter attached to the pressure side. This procedure is repeated until the sodium sulfate solution indicates a pH value of 7.

The eccentric screw pump previously used kept having problems with the sealing. As the air quality control requirements are applicable here, the Boerger Protect Rotary Lobe Pump was selected. The barrier pressure was set to 8 bar in the thermosyphon tank. If the pressure drops below 5 bar, a pressure switch turns off the system. The medium pressure is restricted to a maximum of 3 bar by a pressure transducer. This ensures the minimum barrier pressure of 2 bar above feeding pressure.

Technical data

A chemicals disposal company was looking for a pump for conveying flammable liquids. This pump had to comply with ATEX standarts due to the composition of the media. It also needed to be used as a mobile unit. The disposal company also wanted the pump for draining tanks so that pumping in snore mode would be possible.

They opted for a Boerger Rotary Lobe Pump. A key factor in this decision was the wide variety of material, the customized design and the ease of maintenance of the Boerger Rotary Lobe Pumps.

The mobile unit was equipped with an automatic control cabinet in accordance with ATEX guidelines. The control unit was fitted with a reversing control and a temperature controller.

Technical data

A food recycling company disposes of used cooking oil, kitchen and food waste, out-of-date food products from the catering trade and frying oil. The prepared food waste can be used as a raw material for the production of biodiesel or to produce environmentally-friendly energy from biogas plants in the form of electricity and heat.

The food waste is coarsely chopped by a hammermill. To reduce the remaining solids in the liquid medium even more before they enter a centrifugal separator, the customer has incorporated a Boerger Multichopper plus. The Multichopper plus is equipped with the automatic Mechanical Cut Adjustment unit. The MCA unit ensures optimum cutting performance at all times.

The customer is extremely pleased with the Boerger Multichopper plus. The efficiency of the downstream centrifugal separator could be increased as a result of the excellent chopping yield.

A company specializing in extracting water from sludge and processing contaminated sludge from the petrochemicals industry uses several Boerger Rotary Lobe Pumps in a mobile separation system.

The entire separation is gas proof. The nitrogen used is for increasing the safety. The oil sludge to be purified is pumped to a centrifuge with a Boerger Rotary Lobe Pump. Using the centrifuge, oil and water are separated from the sludge. Two additional Boerger Rotary Lobe Pumps convey both the separated oil and the water to the intended containers. The customer wanted to have compact pumps in the mobile separation facility. The customer was impressed with the Boerger Rotary Lobe Pumps due to the high processing quality and in particular, the low maintenance design. In a few steps, the pumps can be repaired by the customer's in-house personnel. The pumps are built as ATEX models due to the explosive protection zone in the separation facility.

Technical data

Waste solvents and lacquers are collected in a basin. These media contain solids. The solids have to be macerated to be able to resell these highly flammable substances for energy production. To this end, the company uses a combination of a Börger pump and Multicrusher. This Börger duo pack is lowered to the ground of the basin filled with waste solvents and lacquers. The Börger rotary lobe pump constantly conveys the medium through the Multicrusher in circulating operation. The solids are macerated in this process. As the basin is declared an explosion-proof area, the rotary lobe pump and the Multicrusher were built in ATEX-compliant design.

Technical data

A disposal company was looking for a high performance pump for a tanker. A number of different media is to be transported with the tanker and the customer wanted a pump which would cope well with solvents, waste oil, sludge and various chemicals. The pump also had to have a compact design.

The customer opted for a Boerger Rotary Lobe Pump. The very compact, space-saving pump is powered by a hydraulic motor. The tanker can be filled and drained using the same pipe system since the rotary lobe pump is reversible. The Boerger Rotary Lobe Pump is extremely easy to maintain. (MIP=Maintenance in Place). The quick-release cover means that the rotor can be replaced in a matter of minutes. This proves great benefit for the disposal company as they have different rotors which could be installed in the rotary lobe pump depending on the medium in use at the time. This gave them the perfect rotor for each medium and avoided any unnecessary wear. The customer is very satisfied with the Boerger pump.

Technical data

In a waste disposal company a Börger pump feeds secondary fuels to the waste incinerator. The pump has to handle different ph values, viscosities and solids since various secondary fuels are to be used. What’s more, for firing the incinerator, precise metering and an even conveyance are the prerequisite for optimum operation of the lance burner in the waste incinerator. As the media to be conveyed are easily inflammable, the pump is built in ATEX-compliant design.

Technical data

A recycling company collects grease from the grease separators from the surrounding industrial and municipal companies. The grease is delivered by means of liquid transporters in charges between 2 and 15 m3.
The company uses a Börger rotary lobe pump for emptying the tanker trucks. The pump conveys the grease into a storage tank. As the delivered grease often contains solids (working gloves, cleaning cloths, knives etc.), a Börger Multichopper plus has been installed in front of the pump.

TEchnical data

An environmental service provider uses a Börger Rotorrake for macerating solids in front of a chamber filter press. Sludge from grit chambers, pump chambers and rain overflow basins are supplied in the coarse sludge receiving station of the environmental service provider. In the process, the solids-laden sludge pass a screen with a grid size of 100 mm and are collected in a receiving basin. The connected Rotorrake macerates the solids still left so that they cannot damage the chamber filter press. The Rotorrake is equipped with an automatic reversing control unit which prevents the solids from stucking.

Technical data

In a company situated in the Ruhr area, Germany, a Börger Rotary Lobe Pump is used for transferring photo chemicals in a recycling plant. The pump has a casing and flanged connections made of stainless steel and has been running for ten years to the full satisfaction of the customer.

Technical data

In a recycling plant  coarsely shredded plastic is washed and finely chopped simultaneously in one procedure. The mixture of plastic and water can then be pumped to the Boerger Multicrusher. This chops the plastic parts reliably into the required product particle size .

Technical data

A plastic recycling company producing polypropylene granulates from post-consumer plastics uses two Börger Bioselect RC 75 in its plant. The two Bioselect units separate plastic residues from the washing water. Reducing the residual water content helps to save a lot of energy in the recovery process.

Before purchasing the Börger separators, the plant had already tested several devices. The Bioselect reduced the residual water content to less than 20 %, whereas a residual water content of almost 50 % was measured in the plastic residues following separation by the other devices.

The two Bioselect RC 75 are integrated in the process. Due to process-related circumstances, the process flow feeding the Bioselect cannot be regulated. A control unit automatically adjusts the speed of the separators to the volume of the feed flow and the solids content contained therein. This ensures that the two separators always operate at their optimal capacity.

The operator of the recycling plant is very satisfied with the two Börger separators as they are very energy-efficient. The customer was impressed by the high dewatering degree and the long service life of the separators.

Technical data