Phosphate dosing device

1、 Overview of Phosphate Dosing Device Process:

This phosphate dosing device mainly includes four parts: the solution preparation system, the metering and dosing system, the safety system, and the control system. Solid phosphate is added to the solution tank, then added to desalinated water or condensed water in proportion and stirred to dissolve. It is then added to the boiler drum through a metering system. The dosing control can be done manually or automatically based on the control signal output by the upper system.

2、 Process principle of phosphate dosing device:

The hardness of calcium and magnesium in boiler feedwater can undergo chemical reactions or concentrate and crystallize at high temperatures, forming insoluble scale that firmly adheres to the heating surface of the boiler. This type of scale is a poor conductor of heat and can hinder heat conduction. In severe cases, it may cause boiler tube bursting accidents. In addition, it can also induce and exacerbate chemical corrosion of metals under the scale, posing serious hazards. Although the boiler condensate and feedwater have undergone strict softening and desalination treatment, there is still a small amount of calcium and magnesium hardness entering the boiler water. If this hardness is not treated, scaling will also pose a threat to the safe operation of the boiler. At present, adding phosphate to boiler water is the most suitable treatment method, and the reaction is as follows:
10Ca2++6PO43-+2OH -=Ca10 (OH) 2 (PO4) 6 (basic calcium phosphate)
Alkaline calcium phosphate is a soft water residue that is easily discharged with boiler discharge and will not adhere to the boiler to form scale.

3、 Introduction to the functional characteristics of phosphate dosing device:
This device mainly consists of four parts: liquid dissolution and preparation system, metering and dosing system, safety system, and control system. Solid phosphate is added to the dissolution tank, and then desalinated water or condensate water is added in proportion and stirred for dissolution. It is added to the boiler steam drum through the metering and dosing system. The dosing control can be done manually or automatically based on the control signal output by the upper system.

4、 Scope of application of phosphate dosing device:

The dosing devices produced by Lianyungang Huaneng include systems for adding ammonia to feedwater, adding hydrazine, adding phosphate to boiler water, adding ammonia to condensate water, as well as dosing for circulating water treatment and sewage treatment. The phosphate dosing device is mainly composed of four parts: control system, mixing system, dissolution tank, public platform, and metering pump. Its unit combination form mainly depends on the different requirements of users, the level of automation (automatic or manual control), the selection of dosing pump types, and the flexible composition of various forms of units. It is installed on a base. This industrialized complete set of device has the characteristics of compact structure, complete configuration, fast installation, simple operation, and convenient maintenance. The materials of each component of the phosphate dosing device unit combination device are mainly divided into several forms such as stainless steel, carbon steel, carbon steel lining rubber, etc., which can be determined according to user needs. The company's performance covers industries such as water treatment, wastewater treatment, food, beverage, papermaking, textile, printing and dyeing, electroplating, chemical liquid addition, and chemical engineering.

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