Jiangsu Du'an Environmental Protection Dosage Mixing Pump JBJ-800, Impeller Diameter 800mm

Vertical propellerTechnical Requirements:

Paddle CollapseBasic requirements for mixers

·Equipment specifically designed and manufactured for sludge balancing ponds in water purification plants, capable of generating a uniform flow from top to bottom within the pond.

Fluid flow patterns.

· The equipment provided is a vertical mechanical mixer, with the motor mounted vertically, featuring a gear reduction unit.

The blade is an efficient variable incidence axial flow blade with a pulp leaf design.

·The mixer base is mounted on the balanced pool's open-bottom base, with the impeller featuring a suspended design; all pool components such as the impeller

Wheels and shafts should be folded out, inserted, and adjusted from the top of the mounting holes under the operation of water flow.

The equipment should operate continuously under full load in fluid environments with a pH range of 3-9; operation under rated load without any fault

Cumulative operating hours of not less than 20,000 hours, with a service life of over 10 years.

·The entire unit should be capable of being segmented for installation and disassembly, with a design that facilitates such segmentation. However, the motor and reducer must be a complete assembly unit, and there should be no auxiliary bearings above or below the water for the agitator shaft.

·The equipment must operate smoothly and vibration-free at operating speed.

·Components should possess adequate strength and rigidity. All materials used in the manufacturing of mixers should be able to withstand the corrosion and abrasion from concrete additives. Materials that come into contact with liquids should be made of corrosion-resistant, non-toxic materials. Unprotected or non-corrosion-resistant materials should not be used.

All components manufactured require surface corrosion protection treatment.

BlenderAssemble the electrical control cabinets in pairs.

2. Technical Requirements for Electrical Control Cabinets

·Main electrical components inside the control box: circuit breakers, contactors, motor protectors, changeover switches, buttons, indicator lights (LED sources), etc. The voltage and current ratings of the main components should match the controlled equipment and allow for a margin. All components must be products from internationally renowned brands (such as ABB, Schneider, Siemens, etc.). The plastic components inside the cabinet should be halogen-free, CFC-free, flame-retardant, and self-extinguishing.

The electrical control box features an aluminum-zinc coated steel plate housing with IP55 protection grade, and comes with accessories such as a 1.2-meter-high stainless steel mounting bracket.

·The control cabinet's incoming power is a single 380V/220V three-phase five-wire system power supply. The control power required inside the control cabinet is self-solved within the cabinet, with the control power being AC 220V. If other standard control power supplies are needed, they should be self-transformed within the cabinet.

The electrical control box should be equipped with short-circuit, overload, phase failure, and a variety of special protection functions for the matching equipment.

·The control box is equipped with a manual/automatic switch for control mode conversion. In manual mode, the control is operated manually on the control box, while in automatic mode, the PLC controls it automatically based on process parameters.

·The control box should be capable of receiving PLC's start/stop control commands (passive contacts) and send start/stop, manual/automatic, and fault status signals to the PLC (passive contacts). Passive contact capacity: 220V, 5A.

3. Construction and Materials

Motor

The electric motor and reducer must be a complete assembly installed together.

Technical Requirements for Electric Motors:

The motor material and performance should comply with the standards of "Basic Technical Requirements for Rotating Electrical Machines" GB755-87, as well as relevant technical standards issued by ASTM and IEC.

·The motor should be suitable for operation with a 380V/3ph/50Hz power supply, with the motor stator winding and stator lead insulation at least F class, IP55 protection rating for the housing, and vertical installation.

·The motor design should be efficient, capable of operation under shock loads, with a rated power greater than 1.15 times the designed shaft power of the mixer, but not exceeding 1.3 times; grease-lubricated ball bearings, at 1500rpm or 1000rpm or

Operate and run at 750 rpm.

② Deceleration Device

The mixer employs a gear reduction unit, the material and performance of which should comply with the relevant provisions of Clause B8 of the general technical specifications. Technical requirements for the reduction unit:

Electrical Control System

The operation of the high-efficiency sedimentation pond system is centralized control on-site.

In the operation of the efficient sedimentation system, a combination of automatic control (with reserved control ports) and manual control is achievable. Wiring must comply with the standards of the International Electrotechnical Commission. The control system operates the equipment according to the process design requirements.

All control cabinets must be manufactured by professional manufacturers, utilizing high-quality materials and standards for wiring and assembly. They are capable of combining automatic control (with reserved control ports) and manual control during operation. The control system monitors and controls the equipment operation according to the process design requirements.

Electrical control systems include electrical control cabinets and field button boxes. The electrical control cabinets control the operation of all equipment within the high-efficiency sedimentation systems.

The control cabinet features both manual and automatic (with reserved control ports) control functions.

Field button boxes are all made of stainless steel.SS304Material: The interior of the cabinet requires the design of a cooling fan and an air inlet dust filter. The dimensions and arrangement of electrical components need to be confirmed. The control cabinet wall thickness should not be less than2.0mmButton box not less than1.5mmIP rating requiredIP65。

Control functions include:

Each unit's operation and shutdown control, as well as status display

All decelerating motors are activated.

All sludge recirculation pumps/Operation of the discharge pump

Operation of other electrical equipment

Overload Protection

Emergency Stop

One upon the release of the parking and alarm signals

Specific control content as follows::

Overload Alarm and Emergency Braking for Mechanical and Electrical Equipment

A配套联动device

Upon startup, shutdown control

Upon startup, fault indication