Economizer hot water recirculation system applicable for subcritical steam drum boiler generator set, and working method thereof
A technology of recirculation system and generator set, which is applied in the direction of steam generation, preheating, and control of water supply, etc. It can solve the problems of simple structure of recirculation pipeline and backflow of low-temperature feed water, etc., so as to improve the smoke temperature, reduce the amount of renovation work, and save investment small effect
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[0020] The present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are explanations of the present invention and the present invention is not limited to the following examples.
[0021] Example.
[0022] see figure 1 , an economizer hot water recirculation system suitable for subcritical drum boiler generator sets, including an economizer 1, a steam drum 2, a downcomer 3 and a water supply pipe 4, the water outlet of the economizer 1 and the steam drum 2 are connected, the water outlet of economizer 1 is provided with a water temperature monitoring point, the steam drum 2 is connected with the down pipe 3, and the water supply pipe 4 is connected with the inlet of economizer 1; it also includes No. 1 electric regulating valve 5, No. 2 electric regulating valve Valve 6, manual shut-off valve 7, No. 1 check valve 8, No. 2 check valve 9, circulation pump 10, recirculation pipe 11 and bypass 12...
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