Submersible sludge return pump

Jiangsu Du'an Environmental Protection QJB-W type 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.

Working characteristics:

Compact structure, easy installation, simple operation, easy maintenance, no noise, and can be installed anywhere.

QJB-W type sludge reflux pump technical description:  

The QJB-W type 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, and control of water channel systems, as well as in recirculation or slurry suction circuits in wastewater treatment processes that require low head and large flow rates.

The QJB-W type sludge reflux pump is equipped with a technically advanced axial operation three-blade impeller, which has excellent self-cleaning and vibration-free functions. The impeller design meets the requirements of large flow and low head, forming a large flow axially. It adopts Flygt submersible motor sealing technology from Sweden 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 to prevent secondary failures. The motor windings of the QJB-W type submersible reflux pump use the internationally advanced safest overheating protection process. In case of overheating due to motor overload, high 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 type sludge reflux pump is equipped with a single guide rail automatic coupling system, ensuring quick installation, lifting, and maintenance. Developed based on the digestion and absorption of foreign similar product technologies, it features high efficiency, anti-wrapping, no clogging, automatic coupling, high reliability, and automatic control. It has unique functions in discharging solid particles and long-fiber garbage. The QJB-W submersible reflux pump is a self-developed product based on the introduction of 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 type sludge reflux pump has low head, large flow, and high efficiency. The impeller features high-performance hydraulic design structure, with swept-back blades that have self-cleaning functions, anti-clogging, and anti-wrapping. It uses new sealing materials, two mechanical seals made of tungsten carbide – tungsten carbide, imported bearings, and all fasteners are stainless steel, allowing the pump to operate safely and continuously for over 10,000 hours. The QJB-W type submersible reflux pump has a compact structure, simple operation and maintenance, easy installation and repair, and long service life. The main unit adopts cast or stainless steel pressure-filled molding structure, with small size, high density, corrosion resistance, and no noise. It is equipped with protection and alarm devices for leakage, water leakage, and motor overload to ensure the safety and reliability of the product.

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 rods, stainless steel lifting chains, cantilevers, lifting hoists, wall-mounted pipes, flap gates, 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 underwater cable 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 establishing the company's reputation, and it is also 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 principle of customer first. All products produced by our company meet strict enterprise standards and national machinery ministry standards.

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

3. For large-scale engineering projects, production, testing, and inspection will be organized according to the requirements of the bidding documents, and on-site acceptance will be coordinated with the customer.

4. Strictly organize the procurement of raw materials and components and the production and inspection of products in accordance with ISO9001 standards.

5. Provide three guarantees (warranty, return, exchange) service when the product cannot be used normally due to manufacturing quality issues under normal storage, transportation, maintenance, and use conditions by the customer.

6. Provide necessary technical documents and product qualification certificates for products leaving the factory.

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

8. If damage or abnormal operation 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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