Customized Submersible Sludge Return Pump Manufacturer

Jiangsu Du'an Environmental Protection QJB-W Submersible Reflux Pump is a specialized equipment for mixed liquor reflux and denitrification nitrogen removal in secondary sewage treatment plants. It can also be used in applications requiring low head and large flow rates, such as surface drainage, irrigation, and recirculation in wastewater treatment processes.

Operating Features:

Compact structure, easy installation, simple operation, convenient maintenance, noiseless operation, and flexible placement.

Scope of Application:

The submersible reflux pump can operate normally and continuously under the following conditions:

Altitude not exceeding 1000m;

Maximum medium temperature not exceeding 40°C;

Medium pH value between 5-9;

Liquid density not exceeding 1150kg/m³;

Long-term submersible operation, with a diving depth generally not exceeding 20m;

QJB-W Sludge Reflux Pump Technical Description:  

The QJB-W sludge reflux pump is a new product developed based on submersible mixer production technology. This pump is a professional equipment for mixed liquor reflux and denitrification nitrogen removal in secondary sewage treatment plants. It can also be used for pumping purified water during surface drainage, irrigation, controlling water channel systems, recirculation in wastewater treatment processes, or in slurry suction circuits requiring low head and large flow rates.

The QJB-W sludge reflux pump is equipped with a technically advanced axial-flow three-blade impeller, which features excellent self-cleaning and anti-vibration functions. The impeller design meets the requirements for both large flow and low head, generating high flow axially. It adopts Swedish Flygt submersible motor sealing technology to ensure safe and reliable sealing. When water enters the oil chamber, the humidity sensor in the probe leakage detection system will automatically send an alarm signal for timely detection, preventing secondary failures. The motor windings of the QJB-W submersible reflux pump use the internationally advanced safest overheating protection process. In case of overheating due to motor overload, excessive medium temperature, or other reasons, the temperature sensor will send an alarm signal or automatically shut down the pump before the temperature exceeds the allowable limit.

The QJB-W sludge reflux pump is equipped with a single-guide rail automatic coupling system, ensuring quick installation, lifting, and maintenance. Developed based on digesting and absorbing similar foreign product technologies, it features high efficiency, anti-clogging, non-clogging, automatic coupling, high reliability, and automatic control. It has unique functions in discharging solid particles and long-fiber debris. The QJB-W submersible reflux pump is a self-developed product based on introduced German submersible motor production technology. It is a specialized equipment for mixed liquor reflux and denitrification nitrogen removal in secondary sewage treatment plants and can also be used in applications requiring low head and large flow rates, such as surface drainage, irrigation, and recirculation in wastewater treatment processes.

The QJB-W sludge reflux pump offers low head, large flow, and high efficiency. The impeller has a high-performance hydraulic design structure, with swept-back blades featuring self-cleaning functions, anti-clogging, and anti-winding. It uses new sealing materials, dual mechanical seals made of tungsten carbide–tungsten carbide, imported bearings, and all fasteners are stainless steel, enabling the pump to operate safely and continuously for over 10,000 hours. The QJB-W submersible reflux pump has a compact structure, simple operation and maintenance, easy installation and repair, and a long service life. The main unit adopts a cast or stainless steel pressure-filled molding structure, with 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.

Jiangsu Du'an Environmental Protection Sludge Reflux Pump Supply Scope:

Jiangsu Du'an Environmental Protection internal reflux wall-mounted pump should be a complete set of equipment and must be equipped with a local control box, stainless steel double guide rails, stainless steel lifting chains, cantilever, lifting hoist, wall-mounted pipe, flap valve, cables from the control box to the equipment, and other necessary accessories for safe operation.

Supply Scope (including but not limited to the following):

(1)  Fully assembled internal reflux pump

(2)  Monitoring unit

(3)  Complete lifting device

(4)  At least 10m of submersible cable provided for each pump

(5)  All connecting accessories, embedded anchor bolts, etc.;

Du'an Environmental Protection Equipment (Jiangsu) Co., Ltd. After-Sales Service:

After-sales service is crucial for the company's business development and reputation, as well as an important step for the company's progress.

For users, it is a guarantee of product quality and peace of mind.

1. Adhere to the customer-first principle. All products produced by our company meet strict enterprise standards and national machinery ministry standards.

2. Provide spare parts, installation, debugging, maintenance services, and technical training for relevant personnel in a timely manner according to customer needs or agreements.

3. For large-scale engineering projects, organize production, testing, and inspection according to tender requirements and cooperate with on-site customer acceptance.

4. Strictly follow ISO9001 standards for the procurement of raw materials and components, as well as for product production and inspection.

5. Provide three guarantees (warranty, return, and exchange) services if the product fails to function normally under normal storage, transportation, maintenance, and usage conditions due to manufacturing quality issues.

6. Provide necessary technical documents and product qualification certificates for出厂 products.

7. During the warranty period, if the equipment fails to meet specified technical parameters due to errors in the equipment or technical资料 provided by us when the user operates it reasonably according to the relevant technical documentation, the user shall immediately notify us. We will replace/repair the defective equipment or technical documentation within 24 hours after receiving written or telephone notification.

8. If damage or malfunction occurs due to improper use by the user or outside the warranty period, our company provides lifetime maintenance services for the product.

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