Jiangsu Du'an Environmental Protection Denitrification and Nitrogen Removal Recirculation Pump QJB-W7.5/12, QJB-W10/12
Voltage: 380V
304 stainless steel
Field control cabinet installation and usage
Duwan QJB-W7.5/12Type Nitration Liquid Recirculation Pumps and Sludge Recirculation Pumps are new products developed by Jiangsu Du'an Environmental Protection on the basis of submersible mixer production technology. These pumps are specialized equipment for mixing liquid recirculation and denitrification in secondary wastewater treatment plants, and can also be used for pumping purified water during ground drainage; irrigation and control of waterway systems; and in low head, high flow applications during the recycling process in wastewater treatment or sludge suction circuits.
Sludge contained in the medium of sludge pumps can cause significant wear on the pump's cavity and rotor. Therefore, the pump must be wear-resistant and easy to maintain. Cam rotor pumps possess these characteristics.
We recommend using the new gear pump from Jiangsu Du'an Environmental Protection. It's quite useful, with multiple patents and high quality. Our rotors are made of nitrile rubber, offering excellent wear and corrosion resistance. The pump chamber is equipped with protective liners, and it's easy to maintain, requiring only one person to handle operations and maintenance.
If the sludge return pump and the excess sludge pump are submersible pumps, a sludge return pond is typically constructed, and they are installed in the sludge return pond.
If both are dry pumps, they are installed in the pump house, with the pump suction inlet connected to the sedimentation tank sludge pipe or the sludge pond.
QJB-WThe type submersible recycle pump features automatic coupling installation with guide rail, ensuring quick installation, upgrade, and maintenance. It has been developed based on the advanced technology of nitration and absorption from foreign similar products, boasting high efficiency, anti-tangling, no clogging, automatic coupling, high reliability, and automatic control. It has unique functions in conveying solid particles and long fiber waste.QJB-WSubmersible recycle pumps are self-developed products based on the German submersible motor production technology. They are specialized equipment for the return of mixed liquid in secondary wastewater treatment plants and for denitrification and nitrogen removal. They can also be used in ground drainage, irrigation, and wastewater treatment processes requiring low head and high flow rates.
QJB-WHigh-efficiency type submersible recirculation pump with low head and high flow rate, featuring a high-performance hydraulic design structure of the impeller and self-cleaning backward-curved blades for anti-clogging and anti-tangling. Equipped with new sealing materials and two mechanical seals, made of tungsten carbide – tungsten carbide. Utilizes imported bearings, and all fasteners are made of stainless steel, ensuring safe and continuous operation of the pump.10000Over 8 hours.QJB-WThe compact type diving recirculating pump is easy to operate and maintain, with convenient installation and repair, and a long service life. The main unit is made of cast or stainless steel pressure-formed structure, featuring a small size, high density, corrosion resistance, and no noise. It is equipped with protective and alarm devices for leakage, water leakage, and motor overload, ensuring the safety and reliability of the product.
Jiangsu Du'an Environmental Protection Mixed LiquidRecirculating pump supply range:
Du'anQJB-WThe mixed liquid return through-the-wall pump is a complete set, and it requires accessories for safe operation, including a site control box, stainless steel double rods, stainless steel lifting chains, jib, hoist, through-the-wall pipe, butterfly valve, cables from the control box to the equipment, etc.
Scope of Supply (including but not limited to the following):
(1) Fully assembled internal recirculation pumpMain Engine
(2) Oil Chamber Monitoring Unit
(3) Complete lifting systemHand Crank Hoists or Hand Winches with Stainless Steel Wire Rope
(4) Each pump to be supplied10mUnderwaterSealed Cable
(5) All connecting accessories, embedment bolts, etc.
(6) Three-year spare parts supplyImpellers, bearings, mechanical seals, cables, etc.
Duwan Environmental Protection Equipment (Jiangsu) Co., Ltd. Sludge Recirculation Pump Matching Control Box Safe Operation:
One, equipment operation is divided into two forms: "on-site" and "automatic."
1Automated Control. After checking the power supply and ensuring it is powered on, switch the selector switch on the control cabinet panel to the "Automatic" position. At this point, the submersible pump will be controlled by the central control room, and no on-site personnel action is required.
2Local control.
aCheck the power supply to ensure it is powered on.
b"Locate the 'Local Control Panel' on the cabinet."/Pause/Automatically, switch the selector switch to the "Local" position.
cPress the "Start" button to activate the equipment.
dPress the "Stop" button to halt the equipment's operation.
eImmediately inspect and repair any faults after occurrence, and then reconnect power and reset the operation once the fault is resolved.
Secondly, it is strictly prohibited to operate the sludge pump dry. During operation, the coupling should run evenly with no binding or friction noises.
Three, frequent startups of the sludge pump are strictly prohibited. The standby pump should be operated at least once a week.
Four, after each repair (especially re-wiring), ensure the motor's rotation is in agreement with the pump's specified direction before starting the vehicle officially.
Five, inspect for any abnormal noise or vibration in the mud pump during each shift.
Six, if an abnormal noise is emitted from the mud pump during operation, the pump should be immediately stopped, the standby pump activated, and a maintenance report submitted simultaneously.
