QJB-W18.5 Remaining Sludge Pumps
Diving Recirculation Pump QJB-W15
Manufacturer of remaining sludge lifting pumps
Material: 304 Stainless Steel
Wall penetration pipe, swing door, guide column, and lifting device installation and usage
Duwan Environmental QJB-WSludge Recirculation PumpWiring Method:
Four-core wire: Three-core thick wire is for three-phase power line, one core wire is yellowGreen dual-color is for the ground wire.
Five-core wire: Three-core thick wires are for three-phase power lines, one core wire is yellowThe green dual-color is the ground wire, and the single-core wire is 31# wire (motor leakage signal wire).
Seven-core wire: Three-core thick wire is for three-phase power line, one-core wire is yellow/ Green dual-color is the ground wire, one core wire is 31# (motor leakage signal wire), and the other two core wires are 11# and 12# (motor overheating protection signal wires)
The QJB-W type nitrification liquid回流 pump and sludge回流 pump are innovative products developed by Jiangsu Du'an Environmental Protection on the basis of their submersible mixer production technology. This pump serves as a treatment equipment for mixed liquid回流 and denitrification nitrogen removal in secondary wastewater treatment plants, and can also be used to pump purified water during ground drainage; irrigation and control of waterway systems; and in micro-head, high-flow applications during wastewater treatment recycling or sludge suction circuits.
QJB-W7.5KW Aeration Pond Recirculation Pump Application Conditions:
During continuous operation, the medium temperature does not exceed 40℃.
2. Medium pH range is 6-9.
3. Submersion Depth: 10 meters.
SupplyQJB-W7.5KW Aerothetic Pond Recirculation Pump Model Representation Method:
1. Equipment Name: Remaining Sludge Lift PumpDiving SludgeRecirculating pump
2. Model: QJB-W15 QJB-W7.5
3. Key Technical Parameters:
4. Technical Performance
Equipment Model | QJB-W7.5 |
Motor Power | 7.5kW |
Flow Quantity | 1278m3/h |
Yang Cheng | 0.8~1m |
Motor protection grade | IP68 |
Motor insulation grade | F |
Electrical Source | 380V;3ph;50Hz |
Numbers Quantity | 4 |
4.1The internal recirculation pump rotates smoothly without any jamming, stalling, or vibration.
4.2 Perform a sealed air pressure test on the internal recirculation pump; the test pressure is 3 kg/m³.2, spanningNo leakage observed within 5 minutes.
4.3 The internal recirculation pump utilizes a double mechanical seal structure and lip seal arrangement, ensuring reliable operation for up to 15,000 hours without the need for replacement.
4.4 The lead cable of the internal recirculation pump is made of YZW type rubber sheathed flexible cable as specified in GB5013.2 or an equivalent cable, with the cable sealing head treated with special vulcanization to prevent water seepage from the cable sheath into the motor.Cable jacket features a reliable protective mechanism；
4.5 Surface of the internal recirculation pumpEpoxy coating for anti-corrosion, film thickness over300μm, with a smooth surface free of sand holes and cracks, the flow components are coated with epoxy resin anti-corrosion paint.
4.6 The internal recirculation pump oil chamber is equipped with a sealing leakage protection device.
4.7 The two-color wire (yellow/green) in the cable of the internal recirculation pump is specified as the grounding wire, ensuring a reliable connection. The grounding symbol is clearly marked and is not easily worn off during use.
4.8 The impeller blades and rotors of the internal recirculation pump are tested with dynamic balancing, with a balancing accuracy of G6.3.
4.9 The stator winding of the 4.9 internal recirculation pump is equipped with an electronic humidity sensor to prevent the motor winding from being damaged by moisture.
5. Service Life
The average running time before failure of the internal recirculation pump is not less than15,000 hours, with a total lifespan of not less than 20 years for the entire machine.
6. Structural Design
1) Host computer
The internal recirculation pump features a direct-connected stamping structure, utilizes multi-stage motors, and has blades that are stamped into shape, offering high precision and efficiency. It is compact in design, with a small volume and light weight, making it easy to operate and maintain with a long service life. The housing is entirely made of stainless steel, ensuring an aesthetically pleasing and smooth appearance.
2) Junction Box
The junction box is completely sealed and isolated from any surrounding liquids and motor components.
Cooling: The motor stator is cooled by the surrounding liquid.
3) Blades
The blades are in a three-leaf rubber shape, with steel hub, effectively preventing blade breakage. The blade进口 edge is curved backward, featuring long-lasting automatic cleaning functionality. They are securely fastened to the shaft with lock nuts and are easily removable for maintenance and replacement during lifting.
4) Electric Motor
Insulation grade of the motor winding is:F Grade, featuring a humidity sensor within the stator winding to prevent the motor winding from being damaged by moisture.
5) Oil chamber
Lubricates and cools the sealing device, bearing housing, gears, and the space between the motor and the liquid, with the oil chamber serving to dampen vibrations and reduce noise.
6) Bearings
The service life of the bearing in the internal recirculation pump is greater than80,000 hours
Considering the adverse factors during bearing operation, the selected bearing lifespan will be higher than the aforementioned value. Our company uses imported bearings.
7) Axial Seal
The internal recirculation pump is composed of two mechanical seals and one lip seal. Seal material: Tungsten carbide.Tungsten carbide.
8) Monitoring System
In the stator winding, there are two thermal switches installed. Under normal circumstances, the motor's temperature does not exceed...85℃。
9）Please provide the Chinese content to be translated.MaterialsConfiguration:
Axle Stainless Steel
Yi Wheel Stainless Steel
Shell Stainless Steel
Fasteners Stainless Steel
Install System Stainless Steel
O-rings Nitrile rubber 70
Mechanical Seal Tungsten carbide
