Processing technique for solar energy thermal-collecting tube

The invention relates to a technique for processing a solar energy collector tube .The invention relates to the technique for processing the solar energy collector tube .The layer number of the coating is added; the parameter is strictly controlled in each process; in the coating processing, the first layer is controlled within 280 to 320 seconds, the second to the thirteen layer is controlled within 30 to 80 seconds, and the last two layers are controlled within 90 to 120 seconds; in the coating of the first layer, no nitrogen is permeated and the permeating amount of nitrogen is increased gradually from the second layer.The invention aims at the problem that the original coating technique is based on the experience of the worker and has no reasonable scientific parameter control.The best controlling parameter is determined through a plurality of times of experiments and the test comparison of product technology parameter under different conditions. The coating time is shortened to about 30 minutes from the