The automatic dosing device mainly includes a solution tank, a mixer, a metering pump, a Y-type filter, a solenoid valve, a check valve, a pulse damper, a water level gauge, a pressure gauge, a control cabinet, a mounting platform, etc., which are integrated and installed on a base. The user only needs to place the combined dosing device in the dosing room, connect the dosing tube to the power supply and start to put it into operation, automatically detect the pH of the fluid in the process of operation and intelligently judge and add the corresponding liquid medicine, this factory-oriented complete set of devices, can greatly reduce the workload of design and on-site construction, basically realize unattended, and provide a reliable guarantee for the quality, safety and on-site operation of the whole machine.

Two. The working principle of the fully automatic dosing device

Through the mechanical pulse action of the metering pump and the principle of stroke adjustment, the addition of chemicals to the system is realized. Automatic dosing is achieved through the following two control modes. Time control mode: The microcomputer time-controlled switch is used to control the timing opening and closing of the metering pump and the sewage valve, so as to realize the regular dosing and sewage discharge.

Three. Features of automatic dosing device

1. It can add various proportions of water treatment agents with high precision, and the measurement is accurate.

2. High degree of automation, simple operation and low energy consumption.

3. Installation and use, simple and convenient maintenance.

4. Strong corrosion resistance, strong acid and alkali resistance, safe and reliable.

5. If the user needs, the system can be remotely controlled and incorporated into the computer management system.

Four. Automatic dosing device equipment selection

The central air-conditioning cooling circulating water system only needs to add two chemicals to solve the problems of scale, corrosion and bacteria in the system. That is, one is a corrosion inhibitor and a scale inhibitor, and the other is a bactericidal algaecide, which is solved by coarse filtration for dirt.

Selection and calculation method of central air conditioning cooling circulating water system equipment:

According to the circulating water volume of the central air-conditioning cooling circulating water system is 1000 tons / hour, the water replenishment is considered according to 2-3%, the system works N hours a day, then the daily water replenishment of the system is about 30N, some central air-conditioning cooling circulating water system calculates the water retention of the system according to 30% of the circulating water volume, and the corrosion and scale inhibitor is generally calculated according to the water holding capacity of the system, generally 50g agent / ton of water, and the dosing of fungicide is 100g agent / Each ton of water (determined according to the concentration of the drug and the formula calculation), the dosing cycle is weekly or daily, or manual or fully automatic according to the water quality of the system.

Central air-conditioning cold and hot circulating water system according to the central air-conditioning cold and hot circulating water system circulating water volume of 1000 tons / hour, because it is a closed system, the water replenishment is considered according to 1%, the system works N hours a day, then the daily water replenishment of the system is about 10N, some central air conditioning cold and hot circulating water system according to the circulating water volume of 30% to calculate the water retention of the system, corrosion inhibitor and scale inhibitor is generally calculated according to the water holding water of the system, generally 50g agent / ton of water, the addition of fungicide is 15 agents / Each ton of water (determined according to the concentration of the drug and the formula calculation), the dosing cycle is weekly or daily, or manual or fully automatic according to the water quality of the system.