A heat pump thermal storage complementary high temperature drying system and method
A drying method and high-temperature drying technology, which is applied to heat recovery systems, heat pumps, heat storage equipment, etc., can solve the problems of long investment payback period and high investment cost of industrial power storage systems, so as to improve economy, reduce investment costs, and improve Effect of Energy Efficiency Level
Active Publication Date: 2019-01-08
ZHEJIANG UNIV
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Problems solved by technology
However, the investment cost of industrial power storage system is too high, and the investment recovery period is too long
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[0018] like figure 1 and figure 2 As shown, a heat pump heat storage complementary high-temperature drying system includes a fan 1, a heat pump 2, a high-temperature heat accumulator 3, a dryer 4, an exhaust gas purifier 5, and a power control cabinet 6; the fan 1, heat pump 2, high-temperature heat storage The device 3, the dryer 4 and the tail gas purifier 5 are connected in sequence to form a heat exchange path. The high-temperature heat accumulator 3 includes a heater 7, a heat exchange air duct 8, a heat storage material 9 and a temperature sensor 10; the heater 7 includes a solar concentrating heater 7-1 and / or an electric heater 7-2, in two forms , which can be used simultaneously or individually in the system. The form of the solar concentrating heater 7-1 is to construct a heat-absorbing cavity on the surface of the high-temperature heat accumulator 3, and the electric heater 7-2 is directly installed inside the heat storage material 9; the inside of the heat stora...
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The invention discloses a heat pump and stored heat complementary type high-temperature drying system and method. The drying system comprises a fan, a heat pump, a high-temperature heat accumulator, a dryer and an exhaust purifier. The fan, the heat pump, the high-temperature heat accumulator, the dryer and the exhaust purifier are connected in sequence to form a heat exchange channel. According to the heat pump and stored heat complementary type high-temperature drying system and method, step-graded complementary heating is achieved by using complementary matching of the heat pump and high-temperature stored heat; the adjusting utilization of peak valley electricity and solar energy is achieved by using heat accumulating devices; the purposes of high efficiency in the medium and low temperature heating process and lowering of investment cost and operating cost in the high-temperature heating process are achieved; the economical efficiency of the system is greatly improved; and the economical efficiency of heating for a high-temperature section is improved.
Description
technical field [0001] The invention relates to a heat pump heat storage complementary high-temperature drying system and method, belonging to the field of high-temperature drying. Background technique [0002] Drying is an important process in the process of industrial and agricultural production and has broad market prospects. Drying can be divided into medium and low temperature drying (usually lower than 100°C), medium temperature drying (120-250°C) and high-temperature drying (~300°C) according to the temperature. For medium and low temperature drying, technologies such as solar energy and heat pumps are currently used to achieve efficient drying; for medium and high temperature drying, high-temperature flue gas waste heat and direct electric heating are mainly used to achieve high-efficiency drying. [0003] It is worth pointing out that, for a system that achieves medium-high temperature heating and drying by direct electric heating, there is a high cost of power con...
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IPC IPC(8): F26B25/00F28D20/00F25B30/06F26B23/10F24H3/00F24V30/00
CPCF24H3/00F24V30/00F25B30/06F26B23/10F26B25/005F28D20/0034F28D20/0056F28D2020/0047Y02B30/52Y02E60/14Y02E70/30
Inventor 张良范利武郑梦莲俞自涛胡亚才
Owner ZHEJIANG UNIV