The central hot water solution in textile printing and dyeing process, a lot of links to use hot water, hot water supply for printing and dyeing enterprises have a vital role and significance. At present, China dyeing and printing industry has nearly 2000 enterprises above designated size, the size of tens of thousands of the boiler, the vast majority of printing and dyeing enterprises apply steam to heat the cold water and consume a large amount of coal each year, using this way of printing and dyeing production of hot water, large energy consumption, high cost and serious pollution. Therefore, seek a more environmental protection printing and dyeing hot water energy-saving technology is particularly important.
       The advantages of solar energy hot water system
       Solar energy is a kind of abundant energy, each country can be unlimited use. In more than 90% of total annual radiation more than 5000 mj / ㎡, in addition to the sichuan basin and which the mausoleum area, most of the solar energy resources fairly or exceed the same latitude regions of solar energy resources abroad, especially in central and southern qinghai-tibet plateau solar resource is rich, has the good development condition and application value.
Sunny day, when the sun heat cold water within the collector to 60 ℃, the temperature can be set up, the cold water pipe on the electromagnetic valve automatically opens, cold water is tap water pressure into the panels, and hot water inside the panels into thermal storage tank for use, when the water reaches the panels at the exit of the temperature probe, probe temperature falls below 60 ℃, electromagnetic valve immediately shut down, cold water stay inside the panels is sunlight to heat, after 1 ~ 3 min, and water temperature to 60 ℃, the electromagnetic valve to open again, inside the collector was squeezed to the hot pools of hot water so, full stop after the water into the water to hot water. In order to make full use of solar energy, circulating water pump will automatically start, pulled out within 60 ℃ hot water pool, after heating solar collector loop, further raise the water temperature.