Plate heat exchangers are ideal equipment for liquid-liquid, liquid-vapor heat exchange. It has the characteristics of high heat exchange efficiency, small heat loss, compact and lightweight structure, small footprint, wide application, and long service life. What are the causes and preventive measures of plate heat exchanger blockage?
1. Plate heat exchanger is blocked
The plate heat exchanger has a small circulation gap (2.5 ~ 6mm), and particle debris with a diameter greater than 1.5 ~ 3mm easily obstruct the passage. The pressure drop of the equipment changes sharply, the flow rate decreases, and the poor heat exchange effect makes the equipment ineffective. Prevention can be equipped with a filter or scouring device at the outlet of the medium, and the cleaning or treatment may be suspended during the current period.
2. Plate heat exchanger fouling
After the plate heat exchanger is used, it may be scaled due to heat transfer or cooling medium, which may cause the heat transfer coefficient of the plate heat exchanger to increase. In severe cases, the plate channel can be blocked.When the plate heat exchanger is installed, there are a small number of supporting contacts designed to support the movement of the medium under pressure, so that the fluid forms a stagnation and forms dust. Following time and at a suitable temperature, the calcium and magnesium in the cooling water Ions constitute a honeycomb scale.
Although the causes of plate heat exchanger blockage and plate heat exchanger fouling are different, the effects are the same. Plate heat exchangers should not be used for guessing dirtier or more prone to scale. Do not use unhardened water as a cooling medium, and the temperature should be coherently pleaded to avoid the sensitive temperature zone of calcium and magnesium ions.