Nitration Liquid Recirculation Pump QJB-W4
Nitration Liquid Recirculation Pump Installation Drawing
Mixed-liquid Recirculation Pump Model
QJB-W4 Submersible Recirculation Pump
Material: SUS304 Stainless Steel
The Duwan Environmental QJB-W4 Wall Penetrating Pump is a new product developed based on the submerged mixer production technology. It is a professional equipment for mixing liquid return in secondary wastewater treatment plants, denitrification, and nitrogen removal, and can also be used for pumping purified water during ground drainage, irrigation, and control of waterway systems. It is suitable for low head and high flow applications in the recycling process of wastewater treatment and sludge extraction circuits.
Duwan Environmental ProtectionQJB-WSubmersible return flow pump with a three-blade impeller that operates axially at the forefront of technology, featuring excellent self-cleaning and vibration-free capabilities. The impeller design meets the requirements of high flow rate and low head, forming a large flow rate in the axial direction. Utilizing the Swedish Flygt submersible motor sealing technology, it ensures secure and reliable sealing. Upon water entering the oil chamber, the humidity sensor in the probe side leakage system will automatically trigger an alarm signal, allowing for timely detection and preventing secondary failures.The qjb-w type submersible recirculation pump motor windings are equipped with a safe overheat protection process. In case of motor overload, excessive medium temperature, or other causes of overheating, the temperature sensor will timely emit an alarm signal or automatically shut off the pump before the temperature exceeds the allowable temperature limit.
DuaneQJB-WA type of diving-through-wall pump with a single guide rail automatic coupling system ensures quick installation, upgrading, and maintenance. It has been successfully developed based on the advanced technology of similar foreign products, featuring anti-tangling, non-clogging, automatic coupling, high reliability, and automatic control. It possesses unique functions in conveying solid particles and long fiber waste.QJB-W Submersible Recirculation PumpIt is a product independently developed based on the引进 German submersible motor production technology, designed for mixed liquid return and denitrification in secondary sewage treatment plants.ProcessEquipment, also suitable for ground drainage, irrigation, and wastewater treatment. During the process, recirculate in areas requiring slight elevation and high flow rates.
Duwan Environmental QJB-W4Type nitration liquid recirculation pump with low head and high flow rate, high efficiency; impeller features high-performance hydraulic design structure; backward swept blades have self-cleaning function, anti-clogging and anti-tangling; utilizes new sealing material; two mechanical seals; material is tungsten carbide.Carburized tungsten, with imported bearings, all fasteners are made of stainless steel, ensuring the pump operates safely and continuously for over 10,000 hours. QJB-WType Submersible Recirculation PumpCompact structure, easy operation and maintenance, convenient installation and repair, long service life. The main unit is made of cast or pressure-molded stainless steel, featuring small size, high density, corrosion resistance, and no noise. It is equipped with leakage, water leakage, and motor overload protection and alarm devices to ensure product safety and reliability.
Features
The Duwan Environmental QJB-W4 Nitration Liquid Recirculation Pump features a compact structure, easy installation, simple operation, easy maintenance, and is noiseless, allowing for convenient installation.
Application Scope
The Duwan Environmental Nitration Liquid Recirculation Pump can operate continuously under the following conditions.
Altitude not exceeding1000m；
Please provide the Chinese content that needs to be translated into American English.Medium temperature not exceeding40OC；
MediumpH range between 5-9.
Liquid density does not exceed1150kg/m3；
Extended dive operations, dive depths generally do not exceed20m；
Structure and Working Principle
The Duwan Environmental Nitration Liquid Recirculation Pump consists of components such as the impeller, submersible motor, flow guide cover, wall penetration pipe, flap valve, lifting rod mounting, hoisting cable, underwater cable, lifting frame, manual hoisting and lowering mechanism, angle steering device, and local control cabinet.
The submersible recirculation pump rotates smoothly without any jamming, stalling, or vibration.
The diving recirculation pump undergoes a sealed pressure test, with the test pressure being0.3 MPa, no leakage observed for 5 minutes.
Submersible recirculation pumps are equipped with a double mechanical seal structure and lip seal to form a dynamic sealing system, with the mechanical seal ensuring inOperates reliably for 25,000 hours without replacement.
Submersible recirculating pumps can operate continuously under conditions of full submersion and exposure of the submersible motor to the liquid surface, while ensuring that they can resume normal operation upon startup after either intermittent operation or long-term shutdown.
Submersible recirculation pump extraction cable is usedYZW type rubber sheathed flexible cables or equivalent cables as per GB5013.2, standard configuration length per unit is 10 meters. The cable sealing head is specially treated to prevent outer skin damage and water seepage into the motor.
The submersible recirculation pump has a smooth and shiny surface, free from any signs of dirt, damage, 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 sealed leakage protection device.
Submersible return pump cable with dual-color wire (yellow)/Green) designated as ground wire, with reliable connection. Grounding symbol is prominent and not easily worn off during use.
Submersible recirculation pump impeller and rotor are tested for dynamic balance, with balancing accuracy ofG6.3；
The submersible recirculation pump features thermal protection switches within the stator winding and at the upper and lower bearing positions, as well as a seal leakage protection device inside the stator cavity.
The installation rod of the submersible recirculation pump ensures the equipment can rotate freely, ascend, and adjust various angles, and it is not necessary to empty the pool for lifting and installing the agitator.
Service Life
Submersible recirculation pumps operate under specified conditions,InitialAverage running time before the last failure was not less than10,000 hours
Service life of the entire machine is not less than20 years.
Structural Design
Impeller
Utilizing a forward-swept reverse-twist curve design, crafted from stainless steel and subjected to dynamic balancing tests and meticulous processing, it offers highPerformanceTransmits motor output power. To prevent clogging and slag formation in the impeller, and to avoid loosening between the impeller and the shaft during operation, an internal locking device is incorporated in the impeller's fixed structure.
Motor
The motor and impeller of the submersible recirculation pump are directly coupled, with the insulation grade of its winding beingF GradePlease provide the Chinese content to be translated.High working temperature up to155OC, Motor forPlease provide the Chinese content you would like translated into American English.No overload under heavy load, motor can start every hour15 times, but the time intervals should be even. The motor stator is inserted into the housing using the hot sleeve method, without the need for any locating pins, ensuring a firm and reliable fit. Under normal conditions, the motor's temperature rise does not exceed 80OC。
Bearings
The motor rotor is supported by a double-row angular contact ball bearing and a cylindrical roller bearing.
The operating life of the diving recirculation pump bearing is greater than100,000 hours
Axial Seal
The submersible recirculation pump consists of two mechanical seals and one lip seal. The outer seal cavity is equipped with a spiral.
Grooves for removing impurities and reducing wear on the machine seal. Seal material: Tungsten carbide./Wolfram carbide.
Monitoring System
Three normally closed thermal switches are installed in the stator winding, with the thermal switches connected in series.140OAction C.
The motor stator cavity and oil chamber are equipped with a leakage detector to monitor dynamic and static seal leaks, and to timely disconnect the power supply.
Du'an Environmental Protection Equipment (Jiangsu) Co., Ltd.After-sales service
After-sales service is crucial for the development of our business and for establishing our company's reputation, and it's also a significant step for a company's advancement. To the users, it ensures product quality and guarantees peace of mind.
