Anti-Clog Submersible Sludge Recirculation Pump for Wastewater Circulation

Anti-Clog Submersible Sludge Recirculation Pump for Wastewater Circulation

Brief Description

QJB-W submersible sludge recirculation pump is specially developed for nitrification liquid recirculation in sewage treatment. Designed with low head and large flow rate, it features wide flow passage to prevent clogging effectively. Made of full stainless steel for superior corrosion resistance, it can run continuously underwater. It is widely adopted for sludge & mixed liquid recirculation in anoxic and anaerobic tanks of municipal wastewater plants to maintain stable sludge balance of biochemical system.

Product Overview

This recirculation pump takes stamped stainless steel submersible body as the main delivery unit. With the specific speed up to 1600, it delivers abundant flow under ultra-low head (minimum 0.5m), perfectly matching sewage recirculation processes requiring tiny liquid level difference and huge circulating flow. Hydraulic structure is optimized via CFD fluid simulation. Wide back-swept blades without narrow gaps allow smooth passage of solid particles and fibrous impurities to avoid winding and clogging. Direct connection between motor and pump reduces mechanical loss and improves overall efficiency. The integrated stainless steel structure has streamlined appearance, fewer spare parts and high standardization. Equipped with automatic coupling installation system, the pump can be lifted for inspection conveniently without draining the tank.

Working Principle

The submersible motor drives the impeller to rotate stably, pushing water axially through wide passages. Relying on ultra-large circulating flow, it transports mixed liquid and activated sludge from aerobic tank back to anoxic/anaerobic tank to complete nitrification and denitrification nitrogen removal process. Its low-head characteristic adapts well to internal liquid level conveying inside tanks with lower energy consumption, greatly improving total nitrogen removal efficiency.

Product Parameters

Key Design & Performance Features

1. Low head & large flow design: High specific speed provides huge circulating flow ideal for internal sludge recirculation;

2. Anti-clogging & anti-winding structure: Wide flow channel and swept-back blades prevent jamming by fiber and solid debris;

3. Full stainless steel construction: Excellent acid & alkali resistance for municipal and industrial wastewater;

4. Optimized hydraulic model via CFD simulation: Low energy consumption and high operation efficiency;

5. Automatic coupling mounting system: Easy hoisting, convenient underwater installation and maintenance;

6. IP68 waterproof Class F insulated motor: Equipped with anti-condensation device and dual tungsten carbide mechanical seals for stable leak-free long-term underwater operation.

Applications

Applied to AO process & oxidation ditch sludge nitrifying liquid recirculation in municipal sewage plants; wastewater circulation for printing & dyeing, food and chemical industries; large-flow low-head water circulation of various pools. Operating conditions:

1. Altitude ≤ 2000m, max ambient temperature: 50℃

2. Applicable pH range: 3~12

3. Liquid density ≤ 1150kg/m³

4. Max submergence depth ≤ 20m

5. Power supply: 380V/50Hz

6. Max diameter of passing solid particles ≤ 50% of outlet diameter

Company Profile

WESUS is a leading manufacturer and total solution provider for advanced sewage and sludge treatment systems. Founded in Yixing, China in 2013, we offer reliable, cost-effective equipment and engineering services to global clients. Certified with ISO 9001, ISO 14001 and ISO 45001, we boast strong in-house R&D and manufacturing capabilities supported by a large production base, a professional technical team, patents and university cooperation. Our comprehensive product range includes screening, filtration, sludge dewatering, mixing, aeration and customized solutions. With end-to-end services from design to after-sales support and proven global project experience, we have earned wide recognition including national high-tech enterprise and 5-star after-sales certifications. Adhering to the philosophy of real innovation, excellence and win-win cooperation, WESUS is committed to providing smart, sustainable water treatment solutions for municipal and industrial clients worldwide.

FAQ

Q1: Are you a direct manufacturer? What certifications do you hold?
A: We are a direct manufacturer with our own production facilities and R&D team. We maintain full control over quality, cost, and delivery, and hold certifications including ISO 9001/14001 for our core products.

Q2: What types of collaboration models do you offer?
A: We provide flexible solutions:
- Equipment Supply: Standalone or packaged systems.
- Turnkey Solutions (EPC): Design, procurement, construction, and commissioning.
- Technical Cooperation: Process upgrades, operational maintenance support, and technical consulting.

Q3: How is after-sales service and support ensured?
A: We provide full lifecycle support:
- Warranty: 12–24 months on core equipment.
- Response: 7x24 remote support with fast on-site assistance when needed.
- Spare Parts: Genuine parts are stocked for long-term supply security.
- Maintenance: Annual Maintenance Contracts (AMC) are available to ensure long-term system efficiency.

Q4: What is your typical project execution process?
A: Our standardized workflow ensures efficiency and transparency:
1. Requirement Analysis → 2. Proposal & Quotation → 3. Design Finalization → 4. Production & Factory Testing → 5. Shipping & Installation → 6. Commissioning & Training → 7. After-sales Service.
Customer involvement is encouraged at key milestones.

Q5: Can you provide references or case studies?
A: We have extensive global project experience across municipal and various industrial sectors. We can provide detailed, anonymized case studies and client references upon request.

Q6: What are your payment terms and delivery lead times?
A: - Payment: We accept T/T and L/C, with standard industry progress payment terms.
- Lead Time: Standard equipment: 4–8 weeks. Large custom projects: 12–20 weeks.
A clear production schedule is provided upon contract signing.

Q7: How do you serve international clients?
A: We are experienced in international projects, arranging complete logistics (FOB, CIF, DDP, etc.) and providing full customs documentation. Our designs pre-consider compliance requirements in target markets.

Q8: Can you upgrade or retrofit existing systems?
A: Yes. We specialize in evaluating existing facilities and providing customized retrofit and expansion solutions to enhance performance and capacity with minimal investment and downtime.

Q9: How can we start a consultation?
A: Please contact our Sales Engineering team. To facilitate an efficient discussion, please have your treatment requirements, water quality data, and site information ready. We will provide a preliminary proposal and professional advice.