Solar rapid preheating and warming device and method based on micro-scale channel

In order to solve the problems that a common flat plate type solar heat collection device sold in the market is low in seawater heating and temperature rising speed and low in outlet temperature, the continuous production requirement of a combined heat and power generation seawater desalination system for rapid heating and temperature rising of water cannot be met, and a low-temperature heat source of solar energy and a high-temperature heat source of combined heat and power generation cannot be cooperatively matched. The invention provides a solar seawater desalination rapid preheating and warming device based on a micro-scale channel, which adopts the micro-scale channel to enable seawater to form a scaling liquid film to flow; due to the fact that the seawater liquid film periodically flows through scaling, the turbulence intensity of fluid is enhanced, the heat transfer boundary layer of the liquid film is thinned, and the gradient vector included angle between a velocity field and a temperature field is