The Jiangsu Du'an Environmental Protection QJB-W4 Submersible Recirculation Pump is a new product developed based on the submersible mixer production technology. It is a professional equipment for the mixing liquid recirculation in secondary wastewater treatment plants and for denitrification and nitrogen removal. It can also be used to pump purified water during ground drainage, for irrigation and waterway control systems, and in recycling or sludge extraction loops during wastewater treatment where low head and high flow are required.
Duwan Environmental Submersible Recirculation PumpStructure and Working Principle
The submersible recirculation pump is composed of a impeller, submersible motor, flow guide cover, wall penetration pipe, check valve, installation lifting rod, lifting rope, underwater cable, lifting frame, hand-cranked hoisting device, angle turning device, and local control cabinet.
The submersible recirculation pump rotates smoothly without any jamming, stalling, or vibration.
Submersible recirculation pump undergoes sealed pressure test, test pressure is0.3 MPa, no leakage observed for 5 minutes.
Submersible recirculation pumps feature a dual mechanical seal structure and lip seal to form the dynamic sealing system, with mechanical seals ensuring...Operates reliably for 25,000 hours without the need for replacement.
The submersible recirculation pump can operate continuously under both full immersion and submersion motor conditions where the motor is exposed to the liquid surface. It also ensures normal operation upon startup, even after intermittent operation or prolonged shutdown.
Submersible recirculation pump cable extractionThe YZW type rubber sheathed flexible cables or other cables of equivalent performance in GB5013.2, are equipped with a standard length of 10 meters per unit. The cable sealing heads are treated with a special process to prevent the outer sheath from being damaged and water from渗入 the motor.
The submersible recirculation pump features a smooth and unmarred surface, free from any signs of dirt, scratches, or cracks.
The oil chamber of the submersible recirculation pump has ample space to accommodate expansion caused by temperature differences, and is equipped with a sealing leakage protection device.
Submersible recirculation pump cable with dual-color wire (yellow)/Green) is designated as the grounding wire, ensuring reliable connection. The grounding symbol is clearly visible and not easily worn off during the usage period.
The impeller and rotor of the submersible recirculation pump are tested for dynamic balance, achieving a balancing precision ofG6.3；
Duane QJB-W4The submersible return pump is equipped with a three-blade impeller that operates axially, featuring excellent self-cleaning and vibration-free capabilities. The impeller's design meets the requirements for both high flow rates and low lift heads, forming a large flow rate in the axial direction. It utilizes the Swedish Flygt submersible motor sealing technology to ensure secure and reliable sealing. When water enters the oil chamber, the humidity sensor in the probe side leakage system will automatically emit an alarm signal to promptly identify and prevent secondary failures. The motor winding of the submersible return pump employs cutting-edge overheat protection technology; in the event of motor overload, excessive medium temperature due to other reasons, or overheating, the temperature sensor will promptly emit an alarm signal or automatically shut off the pump before the temperature exceeds the allowable temperature limit.
Jiangsu Du'an Environmental Protection QJB-W4 Through-the-Wall PumpThe Submersible Recirculating Pump with Single Guide Rail Auto-Coupling System ensures quick installation, upgrade, and maintenance. Developed based on the digestion and absorption of similar foreign product technology, it boasts features such as anti-tangling, non-clogging, automatic coupling, high reliability, and automatic control. It has unique functions for conveying solid particles and long fiber waste.QJB-WThe Submersible Recirculation Pump is a product independently developed based on the引进 German submersible motor production technology. It is designed for the mixed liquid recirculation and denitrification in secondary wastewater treatment plants, and can also be used in places requiring low head and high flow, such as ground drainage, irrigation, and wastewater treatment recycling processes.
Duwan Environmental QJB-WThe type submersible recirculation pump features low head and high flow rate, high efficiency, with a high-performance hydraulic design structure of the impeller. The swept-back blades have self-cleaning capabilities, are resistant to clogging and tangling. It utilizes new sealing materials, two mechanical seals made of tungsten carbide, imported bearings, and all fasteners are made of stainless steel, ensuring safe and continuous operation of the pump.10000Hour-plus.QJB-WThe compact type submersible recirculation pump features simple operation and maintenance, easy installation and repair, and a long service life. The main unit is made of cast or stainless steel pressure-formed structure, which is characterized by its small size, high density, corrosion resistance, and noiseless operation. It is equipped with protective and alarm devices for electric leakage, water leakage, and motor overload, ensuring the product's safety and reliability.
Duwan Environmental QJB-W4 SubmersibleThe回流穿墙泵 is a complete set, which requires accessories for safe operation, including a local control box, stainless steel double rods, stainless steel lifting chains, jib, hoist, wall penetration pipe, butterfly valve, and cables from the control box to the equipment.
Product Range (including but not limited to the following)
Fully assembled internal recirculation pump
(2) Monitoring Unit
(3) Complete Lift System
Each pump must be supplied with at least 10 meters of underwater cable.
All connected attachments, embedded parts, and anchoring bolts.
(6) Three-year spare parts inventorySeals, mechanical seals, cables, etc.
