Sump Sludge Lift Pump with Lift Mechanism
Duwan QJB-W5.5 Remaining Sludge Recirculation Pump
ApplicationDescription:
Duwan Environmental ProtectionQJB-W RemainingSludge RecirculationPump is a specialized equipment for the mixing liquid回流 and denitrification in two-stage sewage treatment plants. It can also be used in places requiring low head and high flow, such as surface drainage, irrigation, and wastewater recycling processes.
ProductFeatures：
Compact structure, easy installation, simple operation, easy maintenance, noiseless, can be installed anywhere.
Application Scope：
Submersible recirculation pumps can operate continuously under the following conditions:
Altitude not exceeding1000m；
Please provide the Chinese content to be translated.High medium temperature does not exceed40OC；
MediumPHPlease provide the Chinese content to be translated.5-9Between;
Liquid density does not exceed1150kg/m3；
Long-term dive operations, with dive depths generally not exceeding20m；
Answer: Sludge Recirculation Pump Structure and Working Principle：
Submersible recirculation pumps are composed of a impeller, submersible motor, flow guide housing, through-wall pipe, butterfly valve, installation lifting rod, lifting cable, underwater cable, lifting frame, hand-cranked lifting device, angle steering device, and local control cabinet.
The submersible return pump rotates smoothly without any phenomena such as jamming, stalling, or vibration.
Submersible recirculation pump undergoes a sealed air pressure test, with the test pressure being0.3MPa, spanning5No leakage within minutes.
The submersible recirculation pump features a double mechanical seal structure and lip seal to form the dynamic sealing system, with the mechanical seal ensuring in25000Operates reliably within hours without the need for replacement;
Submersible recirculating pumps can operate continuously under conditions of full immersion and when the submersible motor is exposed to the liquid surface. They also ensure normal operation upon startup after running at an intermittent pace or being shut down for an extended period.
Submersible recirculation pump cable extractionGB5013.2ChineseYZWType rubber sheathed flexible cable or equivalent cable, standard configuration length per unit10mThe cable sealing heads are treated with a special process to prevent the cable sheath from being damaged and water from渗入the motor.
The submersible recirculation pump features a smooth and shiny surface, free from any signs of dirt, dents, cracks, or damage.
The oil chamber of the submersible recirculation pump has ample space to accommodate expansion due to temperature differences, and is equipped with a sealed leakage protection device.
Submersible recirculation pump lead cable with dual-color wire (yellow)/Green: designated as the grounding wire, with reliable connection. The grounding symbol is prominent and not easily worn off during use.
The impeller and rotor of our diving recirculation pump undergo dynamic balancing tests, ensuring precision balance.G6.3；
The submersible recirculation pump is equipped with thermal protection switches within the stator winding and at the upper and lower bearing positions, and a sealed leakage protection device is installed inside the stator cavity.
The installation rod of the submersible recirculation pump ensures the equipment can rotate freely, ascend and descend, and adjust various angles, making it unnecessary to empty the pool for the installation or lifting of the agitator.
Service Life：Submersible return pump under specified conditions,InitialAverage running time prior to the last failure is not less than10000Hour
Service life of the complete unit is not less than20Year.
Duwan Environmental ProtectionQJB-WSludge Recirculation PumpWiring Method:
Four-core wire: The three-core thick wire is for the three-phase power line, and the single-core wire is yellow./Green and green dual-color as ground wire.
Five-core wire: The three cores of thick wire are for the three-phase power line, one core wire is yellow/Green and white dual-color wire is the ground wire, the single-core wire is31#Wire (motor leakage signal wire)
Seven-core wire: The three-core thick wire is the three-phase power line, one-core wire is yellow/Green and white for ground wire, one-core wire is31#Wire (motor leakage signal wire), the other two cores are11#，12#Wire (motor overheating protection signal wire)
Supply Range
Submersible sewage return pump; installation system (wall penetration pipe, flap gate); control cabinet.
Submersible recirculation pumps are designed as a whole submersible unit with sealed connections. All components of the recirculation pump, including the motor and gear box, can operate continuously underwater. The propeller of the recirculation pump is driven by a submersible motor through a gear reduction. The rotating head is streamlined and compact. The recirculation pump is connected to the wall pipe flange with a guide vane. The critical water-tight sealing surfaces of the recirculation pump are machined surfaces, utilizing metal-to-metal contact and employing nitrile rubber.OFormed rings. Centrifugal pumps and their accessories, as well as cables, can all be continuously immersed in depths of20Maintains its watertight integrity underwater. All cast iron surfaces on the external side of the recirculation pump that come into contact with the liquid should be protected with a high-grade epoxy anti-corrosion coating system, with a standard thickness.320μ
DivingThe recirculation pump installation system is mainly composed of hand winches, lifting frames, bracket bases, lifting chain rings, guide rods, through-wall pipes, butterfly valves, etc.
The dedicated installation system allows for quick assembly and disassembly of the recirculation pump (main unit) without draining the pool water. The through-wall pipe is typically fixed in the wall using a two-shot casting method, with the suspension bracket and guide rod secured with expansion bolts, without the need for pre-drilled holes. For ease of installation and maintenance, and to prevent damage from rust, the recirculation pump installation system features a quick-release lifting chain and manual winch for lifting. Generally, each recirculation pump is equipped with a lifting ring chain, while the manual winch is shared among multiple pumps.
