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The invention discloses a preparation method of a high-yield camellia oleifera shell pulp. The preparation method of the high-yield camellia oleifera shell pulp specifically comprises the steps of mechanical grinding, pre-impregnation, mechanical disc grinding treatment, washing, defibering and screening. The preparation method prepares the high-yield camellia oleifera shell pulp through a chemical and mechanical method; the prepared high-yield camellia oleifera shell pulp has the advantages of being high in yield, good in pulping performance and drainability and the like and can be applied tothe fields of paper-based packaging, molding and decorating materials and the like, thereby to some extent easing the stress brought about by shortage in papermaking fiber resources. Besides, a largenumber of waste camellia oleifera shells are applied to the fields of pulping and papermaking to achieve efficient and high-value application of agricultural waste.

The invention discloses a divided water tank device for an internal heat exchanger of a split type solar water heater. Butt welding is carried out by utilizing an end enclosure of a stainless steel confined water bank inner bag; the end enclosure is used as the heat exchanger to play the role of a water tank partition board; the water tank is divided into independent divided cavities; the heat exchanger is sealed with the inner bag of the water tank; the adjacent cavity bodies communicate with each other via draught tubes; the medium circulation and the medium supplement, namely unconfined running of the heat exchanging part, are carried out safely and reliably via an upper circulating pipe and a heat collecting part; and the device can fully improve heat energy transformation and reduce heat loss.