Upgradable Horizontal Mixed Liquid Recirculation Pump

QJB-W2.5/8 Nitration Liquid Sludge Internal Recirculation Pump

Denitrification Nitrogen Removal Recirculation Pump Specifications and Model

Duwan QJB-W2.5/8 Elevating Horizontal Mixing LiquidInternal recirculation pump is a product introduced by our company from GermanyABSThe foundation of our company's technology lies in96Yearly reference to other companies worldwideFrontierProducts developed on a technical foundation, have been widely welcomed by a large number of users since their launch into the market, and have been successively...DomesticDozens of wastewater treatment plants have been operational, yielding satisfactory actual results.

QJB-WThe internal recirculation pump is resistant to clogging and entanglement, featuring a stamping molding structure for its compact size, high precision, corrosion resistance, and noiseless operation. It is equipped with multiple protective measures, ensuring safety and reliability.

1Equipment Name:Diving SludgeRecirculation Pump

2Model No:QJB-W7.5

3Main Technical Parameters:

4Technical Performance

4.1The internal recirculation pump rotates smoothly without any sticking, stalling, or vibration.

4.2 The internal recirculation pump undergoes a sealed pressure test, with the test pressure being3kg/m2, spanning5No leakage within minutes.

4.3 The internal recirculation pump features a dual mechanical seal structure and lip seal arrangement, with mechanical seals ensuring that...15000Operates reliably within hours without the need for replacement;

4.4Inlet recirculation pump cable extractionGB5013.2No content provided for translation.YZWType A rubber-sheathed flexible cable or equivalent, with a cable sealing head treated with special vulcanization to prevent the cable jacket from being damaged and water渗入 motor; the cable sheath is equipped with a reliable protective device.

4.5 The internal recirculation pump is coated with epoxy resin anti-corrosion paint, with a film thickness exceeding300μmThe surface is bright and free of sand holes, cracks, etc., with the overflow components coated with epoxy resin anti-corrosion paint for protection.

4.6 The internal recirculation pump oil chamber is equipped with a sealing leakage protection device.

4.7 Red and yellow dual-color wires in the cable of the internal recirculation pump/Green) designated as the ground wire, connection is reliable. The ground symbol is clearly marked and not easily worn off during use.

4.8 The impeller blades and rotors of the internal recirculation pump are tested for dynamic balancing, with a balancing accuracy ofG6.3；

4.9 The stator winding of the internal recirculation pump is equipped with an electronic humidity sensor to prevent the motor winding from being damaged by moisture.

5Service Life

The average running time before failure of the internal recirculation pump under specified conditions is not less than15000Hours, service life of the whole machine is not less than20Year.

6Structural design

1Mainframe

The internal recirculation pump features a direct-connected stamping structure, utilizes multi-stage motors, and the blades are stamped for precision and efficiency. The design is compact with a small size and light weight, making operation and maintenance easy, and boasting a long service life. The housing is entirely made of stainless steel, with an aesthetically pleasing and smooth appearance.

2Wiring box

The junction box is completely sealed and isolated from the surrounding liquids and motor parts.

Cooling: The motor stator is cooled by the surrounding liquid.

3Leaf

The blades are in a three-leaf rubber shape, with steel hub, effectively preventing blade breakage issues. The blade import edge is bent backward, offeringLong-termAutomatic cleaning feature, securely fastened to the shaft with a locking nut, easy to dismantle and replace during lifting and maintenance.

4Motor

    Insulation grade of the motor winding:FGrade, with a humidity sensor installed in the stator winding to prevent the motor winding from getting damp and burning.

5Oil chamber

    Lubricates and cools the sealing device, bearing housing, and gears between the motor and fluid, the oil chamber serves to dampen vibrations and reduce noise.

6Bearings

The service life of the bearing in the internal recirculation pump is greater than80000Hour(s)

Considering the unfavorable factors during bearing operation, the lifespan of the bearings chosen will be higher than the aforementioned value. Our company selects imported bearings.

7Axial Seal

The internal recirculation pump is composed of two mechanical seals and one lip seal. Seal material: Tungsten Carbide.--Tungsten carbide.

8Monitoring System

 In the stator winding, there are two thermal switches installed. Under normal circumstances, the motor's temperature does not exceed85℃。

9）OriginalMaterialConfiguration:

Axle                                   Stainless Steel

Yi Wheel                                Stainless Steel

Housing                                 Stainless Steel

Fasteners                               Stainless Steel

Install system                             Stainless Steel

OO-Ring                             Nitrile Rubber70

Mechanical Seal                             Tungsten carbide

7Control System

Each internal recirculation pump is equipped with a control and protection signal line, offering overload, phase loss, short circuit, leakage, and over-temperature protection functions along with corresponding signal indicators, ensuring reliable operation of the unit.

8Product Range

Submersible sewage recirculation pump unit; installation system (wall penetration pipe, flap gate); control cabinet.

Submersible return pump features an integrated submersible design with a sealed connection. All components of the return pump, including the motor and gearbox, can operate continuously underwater. The pump propeller is driven by a submersible motor via a gear reduction. The rotating head is streamlined and compact. The return pump is connected to the wall pipe flange with a guide vane. The return pump has a machined surface for critical watertight seal contact areas, utilizes metal-to-metal contact, and employs nitrile rubber.OFormed ring. Centrifugal pump and its accessories, as well as cables, can all be continuously immersed in depths of20The rice remains submerged without losing its watertight integrity. All cast iron surfaces on the external side of the recirculating 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 Recirculating Pump Installation System primarily consists of hand winches, lifting frames, bracket bases, lifting chain rings, guide rods, wall penetration pipes, butterfly valves, etc.

The dedicated installation system allows for quick assembly and disassembly of the recirculation pump (main unit) without draining the pool's wastewater. The through-wall pipe is typically fixed in the wall using a two-shot casting method, with hanger bases and guide rods secured with expansion bolts, without the need for pre-drilled holes. For ease of installation and maintenance, and to prevent corrosion and damage to the pulley, the recirculation pump installation system features a quick-release hoisting chain and hand winch for easy assembly and disassembly. Generally, each recirculation pump is equipped with a hoisting ring chain, while the hand winch is shared among multiple units.