Operating Principle

The dosing unit is a modular assembly, commonly referred to as a skid-mounted unit, which integrates a metering pump as the primary dosing equipment, along with a solution tank, mixer, level gauge, safety valve, check valve, pressure gauge, filter, buffer, piping, valves, base, ladder, automatic monitoring system, and power control system, all assembled on a common platform according to the process requirements.

Pharmaceutical Feeding Equipment, featuring an integrated mechanical and electrical structure. It is available in fixed and mobile (trolley) types for installation. Each type comes equipped with a mixing system, dosing system, and automatic control system. Multiple fixed units can be combined into a single assembly. With a variable frequency control system, it offers on-site control, remote automatic control, and the ability to switch between manual and automatic dosing. It boasts compact structure, small size, low noise, stable operation, easy installation, and user-friendly operation.

The dosing unit, through various process designs, accurately configures solutions of various solid and liquid chemicals, then precisely adds them using a metering pump to meet various design requirements, such as descaling, deoxygenation, coagulation, acidification, and alkalinization.

The dosing process can be manually operated or automated through various electrical devices and instruments such as a PC, magnetic flip level gauge, pH meter, stroke controller, and variable-frequency drive, making the dosing unit an integrated mechanical and electrical product for automatic control.

The dosing amount and pressure of the dosing unit can be selected according to the requirements of the industrial process, with suitable metering pumps available. Flow rates from 1L/h to 8000L/h, and pressure ranges from 0.1MPa to 25MPa are all available for suitable products.

The metering pump offers a metering accuracy up to ±1% and can simultaneously convey various media with individual adjustment.

The volume of the solution tank in the dosing unit ranges from 0.1 m³ to 20 m³, which can be selected based on the dosing amount. Depending on the conveying medium, various materials are available for selection, such as carbon steel (carbon steel lined with rubber), stainless steel, and non-metallic materials (PE, PVC, PP, PTFE), etc.

Performance Description of Dosage Device

The complete set primarily includes the feeding system, drug storage drum, dosing system, and power control system.

The dissolution drum is equipped with facilities for automatic operation, including a liquid level gauge, low-level alarm, and valves. The outer wall of the drum is fitted with a magnetic flip level gauge for real-time monitoring of the liquid level inside. There are feed ports and standby ports on the top of the drum. On the side of the drum, there are discharge ports, drain ports, overflow ports, liquid level gauge interfaces, and corresponding valves. When the liquid level inside the drum falls below the set low-level value, the alarm system is automatically activated, and the dosing pump is paused.

The dosing system includes centrifugal pumps, electromagnetic flowmeters, and related valves.

Features

The system design is the core, overcoming the deficiency of poor system performance inherent in traditional products that are designed around a single device or component.

Drawing on the essence of domestic and international dosing technology, a brand new design concept optimizes the process.

Modular design with integrated assembly, allowing for easy expansion of capabilities and functions.

Flexible configuration solutions based on varying water quality and specific customer requirements.

A wide range of well-known brands, various materials, and different grades of equipment and components are available for selection as per the user's preference.

Choose from manual, automatic, and various other control methods to meet different control requirements.

Common Forms

Chemical补水, Condensate Ammonia Injection System

The ammonia addition system can be fully automated; in addition to manual preparation, the ammonia solution can also be automatically controlled. When the liquid level in the solution tank falls below the set value, the water inlet valve is automatically opened until it reaches the high liquid level and then closes automatically. The control of ammonia addition can also be automated, aside from manual control, with the PLC programmed system performing PID calculations. The variable-frequency drive then controls the dosing pump to achieve automatic dosing of ammonia.

2. Furnace Water Phosphorus and Salt Mixing System

The preparation of phosphate solution involves directly adding trisodium phosphate to the solution box's dosing area, then starting the mixer to dissolve it. The control of the phosphate dosage can be manual or fully automatic. After PID calculations by the PLC programmable logic controller, the variable frequency drive controls the phosphate metering pump to achieve automatic dosing.

Application Scope

Boiler water treatment systems for thermal power generation, closed-loop cooling systems, central air conditioning circulating water systems, raw water pretreatment, and wastewater treatment systems.

Fuel and chemical industry boiler water treatment systems, recirculating cooling systems, chemical additive dosing systems, wastewater treatment and disinfection systems for medical, electronics, and other industries.

Municipal water supply, swimming pool water treatment, waterworks, wastewater treatment, and disinfection of building potable water.

Disinfection for industrial circulating water and industrial wastewater treatment.

Other related industry liquid dosing systems.

Selection Considerations

1. When selecting a dosing unit, first determine the specifications (including metering pump parameters, mixing tank capacity, solution tank capacity, and on-site conditions) based on the required dosage volume of the system. Then, according to the dosing situation, decide on the dosing method (usually "one in use, one in reserve" or "multiple in use, one in reserve").

2. Select the material for each component of the dosing unit (stainless steel, carbon steel, non-metallic materials), the type of metering pump (diaphragm pump, plunger pump), or the parameters of the added chemical (name, concentration, temperature, density, viscosity, corrosiveness, etc.) as required.

3. Order system for how many boxes and pumps;

4. Is the metering pump a plunger pump or a diaphragm pump?

5. Measure pump flow and pressure.

6. Is the system manually controlled or automatically controlled?

7. Special requirements for the dosing device.

Product Model

One box, one pump