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Protecting Progressive Cavity Pumps in Biosolids Systems
Progressive cavity pumps, or screw pumps, have long been fixtures in wastewater treatment facilities. PC pumps are known for being extremely adept at transporting viscous and abrasive fluids, making them an excellent fit for thickened liquids such as waste activated sludge. To get more news about progressive cavity pump, you can visit brysonpump.com official website.
PC pumps consist of a single-helix metal rotor that turns inside of a double-helix molded rubber stator. The rotor and stator construction forms a series of pockets that traverse the length of the pump, pushing fluid from the suction side to the discharge end in a smooth, pulseless flow that is proportional to the rotor speed. The tight tolerances between rotor and stator provide some superior operational benefits but also introduce weaknesses when dealing with wastewater sludge.
The sludge challenge
Wastewater sludge is a high-viscosity, solids-enriched fluid that often contains pump-clogging matter such as large solids, rags and fibers. It is inevitable that inorganic debris will slip through a plant’s headworks screens and become entrained in the process stream, which translates to trash in the plant sludge. This problem has become even worse in recent years with the proliferation of disposable wipes and personal hygiene products that are commonly found in today’s raw sewage. These materials settle within digesters and form larger masses that a PC pump cannot pass. Additionally some solid waste material like small rocks can cause damage to a PC pump’s rotor or stator requiring expensive repairs.
For as long as PC pumps have been pumping wastewater sludge around treatment facilities, operators have been trying to protect the pumps from clogs and damage caused by unwanted debris. Initial attempts were made with single-shafted comminutors. High-speed macerators, which use a spinning blade working against a static orifice plate, have also been tried as a solution to safeguard PC pumps. Both technologies have had limited success and typically break down when dealing with tougher solids or fibrous materials like disposable wipes. The technology that most plant engineers have settled on is two-shafted sewage grinders.
Two-shafted grinders
A leader in the two-shafted sewage grinders is JWC Environmental and its pipeline mounted Muffin Monster suite of grinders. The Muffin Monster grinders utilize low speed with high torque to turn two shafts of hardened steel cutters. The tight tolerance cutters easily shred through any rags and trash in the sludge systems. Due to the high-torque design these grinders can also slice through tougher debris like wood and small rocks that could otherwise damage PC pump components.
The in-line Muffin Monster grinders have been proven in plant sludge systems over the last 40 years to stop pump clogs. Plant operations personnel have benefited in that time from eliminating messy and costly pump repairs as well as stopping unnecessary employee exposure to biosolids. Treatment plant engineers have been so satisfied with Muffin Monsters over the years that the grinders have become a standard piece of equipment for protecting other sensitive plant systems like centrifuges and heat exchangers.
Keeping Monsters current
Over the last four decades the Muffin Monster grinders have also been evolving to keep up with changing requirements. For service and support JWC’s 30K Muffin Monster was updated to have a service-in-place cutter cartridge, that is supported by a cutter cartridge exchange program. This allows operators to order an exact replacement of the cutter cartridge from JWC and have it shipped to the treatment plant without ever taking the plant grinder out of service. The maintenance team can then quickly swap out the cutter cartridge without ever breaking the pipeline flange bolts. The pre-built cutter cartridge comes with a new one-year warranty and the confidence of a factory-certified replacement.
The sludge challenge
Wastewater sludge is a high-viscosity, solids-enriched fluid that often contains pump-clogging matter such as large solids, rags and fibers. It is inevitable that inorganic debris will slip through a plant’s headworks screens and become entrained in the process stream, which translates to trash in the plant sludge. This problem has become even worse in recent years with the proliferation of disposable wipes and personal hygiene products that are commonly found in today’s raw sewage. These materials settle within digesters and form larger masses that a PC pump cannot pass. Additionally some solid waste material like small rocks can cause damage to a PC pump’s rotor or stator requiring expensive repairs.
For as long as PC pumps have been pumping wastewater sludge around treatment facilities, operators have been trying to protect the pumps from clogs and damage caused by unwanted debris. Initial attempts were made with single-shafted comminutors. High-speed macerators, which use a spinning blade working against a static orifice plate, have also been tried as a solution to safeguard PC pumps. Both technologies have had limited success and typically break down when dealing with tougher solids or fibrous materials like disposable wipes. The technology that most plant engineers have settled on is two-shafted sewage grinders.
Two-shafted grinders
A leader in the two-shafted sewage grinders is JWC Environmental and its pipeline mounted Muffin Monster suite of grinders. The Muffin Monster grinders utilize low speed with high torque to turn two shafts of hardened steel cutters. The tight tolerance cutters easily shred through any rags and trash in the sludge systems. Due to the high-torque design these grinders can also slice through tougher debris like wood and small rocks that could otherwise damage PC pump components.
The in-line Muffin Monster grinders have been proven in plant sludge systems over the last 40 years to stop pump clogs. Plant operations personnel have benefited in that time from eliminating messy and costly pump repairs as well as stopping unnecessary employee exposure to biosolids. Treatment plant engineers have been so satisfied with Muffin Monsters over the years that the grinders have become a standard piece of equipment for protecting other sensitive plant systems like centrifuges and heat exchangers.
Keeping Monsters current
Over the last four decades the Muffin Monster grinders have also been evolving to keep up with changing requirements. For service and support JWC’s 30K Muffin Monster was updated to have a service-in-place cutter cartridge, that is supported by a cutter cartridge exchange program. This allows operators to order an exact replacement of the cutter cartridge from JWC and have it shipped to the treatment plant without ever taking the plant grinder out of service. The maintenance team can then quickly swap out the cutter cartridge without ever breaking the pipeline flange bolts. The pre-built cutter cartridge comes with a new one-year warranty and the confidence of a factory-certified replacement.
Nova Rotors RL Wobble Progressive Cavity Pump
The Nova Rotors RL series progressive cavity pump is commonly known as a Wobble pump. It is extremely small and compact but still has all the benefits of a normal progressive cavity pump. It has excellent self-priming capability, can handle viscous fluids, slightly abrasive fluids and fluids containing solids in suspension. This small helical rotor pump produces very few vibrations and has a non-pulsating flow making it excellent at handling shear sensitive fluids. Despite its compact design, it is still capable of achieving flow rates up to 14.4m³/hr and pressures up to 4 bar.To get more news about progressive cavity pump, you can visit brysonpump.com official website.
Th RL series of Wobble pump can be supplied close coupled or long coupled with flexible coupling if required.
The casing of this positive displacement pump can be constructed from various materials including cast iron, stainless steel 304 and stainless steel 316. The rotor is available in stainless steel 304 and 316, while the stator can be supplied in NBR, EPDM and FPM.
There are no dead zones within the pump making it suitable for use in food and beverage applications such as wine, beer and vegetable oil transfer. The stators are also available food grade certified.
The wobble pump series is mechanically sealed as standard.
This small progressive cavity pump is ideal for many applications in the industrial and marine markets, including; fuel transfer, oil transfer, sewage transfer, polymers, flocculants, oily sludge, bilge water transfer, waste water transfer, sludge transfer, marine and agriculture.
There are no dead zones within the pump making it suitable for use in food and beverage applications such as wine, beer and vegetable oil transfer. The stators are also available food grade certified.
The wobble pump series is mechanically sealed as standard.
This small progressive cavity pump is ideal for many applications in the industrial and marine markets, including; fuel transfer, oil transfer, sewage transfer, polymers, flocculants, oily sludge, bilge water transfer, waste water transfer, sludge transfer, marine and agriculture.
New progressive cavity pump KTE
The KIBER KTE are progressive cavity pumps with a hopper and a feeding screw, so they are used for viscous products, masses, pastes and liquids with solids in suspension.To get more news about progressive cavity pump, you can visit brysonpump.com official website.
Their main application is for transferring whole or destemmed grapes and the compact design allows to install them right under the destemming machine.
The feeding screws have a specific design, adapted to every pump size, in order to deliver a gentle passage of solids, according to flow.The hoppers have a safety grid, a drainage and a minimum level resistive sensor to stop the pump in the event there is not product inside, and therefore, to avoid the running on dry, that could damage the rubber of the stator and the mechanical seal.
The pumps are supplied on a stainless steel trolley with wheels with brake. Also, an ergonomic handle prepared to mount an electrical panel is included. Tailor-made electrical panels can be mounted, to cater for your individual needs.
The drive consists of a worm gearbox with flange, coupled to a standard three-phase electric motor according to IEC.
At World Biogas Expo, Vogelsang will also be advising on the processing of structurally rich biomass by means of mechanical disintegration. Long-fiber and coarse input materials such as straw, grass or manure can be processed with the DisRuptor from Vogelsang. This reduces the amount of internal energy required and at the same time increases the gas yield. Vogelsang will also be providing information on other systems from the pumping and shredding technology segments.
The feeding screws have a specific design, adapted to every pump size, in order to deliver a gentle passage of solids, according to flow.The hoppers have a safety grid, a drainage and a minimum level resistive sensor to stop the pump in the event there is not product inside, and therefore, to avoid the running on dry, that could damage the rubber of the stator and the mechanical seal.
The pumps are supplied on a stainless steel trolley with wheels with brake. Also, an ergonomic handle prepared to mount an electrical panel is included. Tailor-made electrical panels can be mounted, to cater for your individual needs.
The drive consists of a worm gearbox with flange, coupled to a standard three-phase electric motor according to IEC.
At World Biogas Expo, Vogelsang will also be advising on the processing of structurally rich biomass by means of mechanical disintegration. Long-fiber and coarse input materials such as straw, grass or manure can be processed with the DisRuptor from Vogelsang. This reduces the amount of internal energy required and at the same time increases the gas yield. Vogelsang will also be providing information on other systems from the pumping and shredding technology segments.