Mixed fluid recirculation pump

Nitrifying liquid recycle pump

QJB-W10 Recirculation Pump

Submersible Recirculation Pump Installation Diagram

1. Equipment Name: Nitration Liquid Recycle Pump

2. Equipment Model: QJB-W10

3. Key Technical Specifications

Usage

 This recirculating pump is designed for mixed liquid recirculation and denitrification in two-stage wastewater treatment plants. It is also suitable for applications requiring low head and high flow rates, such as ground drainage, irrigation, and wastewater recycling processes.

Features

Compact structure, easy installation, simple operation, easy maintenance, noise-free, can be installed anywhere.

Application Scope

The Duwan Environmental QJB-W10 Submersible Recirculation Pump can operate continuously under the following conditions:

Altitude not exceeding 1,000m.

Please provide the Chinese content to be translated.Medium temperature not exceeding 40^OC；

The medium's pH level is between 5 and 9.

 Liquid density not exceeding 1150 kg/m³³；

Extended dive operations, with dive depths generally not exceeding 20 meters.

Recirculation pump structure and working principle

Submersible recirculation pumps consist of a impeller, submersible motor, flow guide housing, wall penetration pipe, flap gate, installation lifting rod, lifting cable, underwater cable, lifting frame, hand-cranked lifting device, angle turning device, and local control cabinet.

 The submersible recirculation pump rotates smoothly without any binding, stalling, or vibration.

 The submersible recirculation pump undergoes a sealed air pressure test with a pressure of 0.3MPa, lasting for 5 minutes without any leakage.

The submersible recirculation pump features a double mechanical seal structure and lip seal to form the dynamic sealing system, ensuring reliable operation for 25,000 hours without the need for replacement of the mechanical seal.

 The submersible recirculation pump can continuously operate under both full immersion and when the submersible motor is exposed to the liquid surface, while ensuring it can resume normal operation immediately upon startup after intermittent operation or long-term shutdown.

 Submersible return pump leads are made of YZW type rubber sheathed cables as specified in GB5013.2 or equivalent cables, with a standard configuration length of 10 meters per unit. The cable sealing heads are treated with a special process to prevent cable sheath damage and water leakage into the motor.

The submersible recirculation pump features a smooth, unscratched, undamaged, and crack-free surface.

The oil chamber of the submersible recirculation pump has ample space for expansion caused by temperature differences and is equipped with a sealed leakage protection device.

The two-color wires (yellow/green) in the submersible recirculation pump's lead cable are specified as the ground wire, ensuring a reliable connection. The grounding mark is prominent and not easily worn off during use.

 The impeller and rotor of the submersible recirculation pump are tested for dynamic balancing, with a balance accuracy of G6.3.

The submersible recirculation pump features thermal protection switches within the stator winding and at the upper and lower bearing positions, as well as a sealing leakage protection device within the stator cavity.

 The installation rod of the submersible recirculation pump ensures the equipment can rotate freely, rise and fall, and adjust various angles. It is not necessary to empty the pool to lift and install the agitator.

Service Life

Diving return pump, under specified conditions, initially...Average operating time before the last failure is not less than 10,000 hours.

The lifespan of the complete unit is not less than 20 years.

Duwan Environmental's QJB-W Mixed Liquid Recirculation Pump, Nitrification Liquid Recirculation Pump, and Through-Wall Pump should be a complete set, and should be equipped with a local control box, stainless steel double rods, stainless steel lifting chains, jib, hoist, through-wall pipe, butterfly valve, and cables from the control box to the equipment, all necessary accessories for safe operation.

Supply Range (including but not limited to the following)

Fully assembled nitric acid liquid回流 pump

(2) Monitoring Unit

(3) Full Hoisting Equipment

(4) Each pump requires at least 10 meters of underwater cable.

(5) All connecting accessories, embedment bolts, and similar items;

(6) Three-year spare parts inventory