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对[tex=2.0x1.214]pEmb2IdSrWxRGQITqRecJw==[/tex] 某湿物料在恒定干燥条件下进行间歇干燥, 物料平铺在 [tex=4.786x1.143]XzXjlmVe+OYVlPxEPob/mXKgKCEWRtVEp/ac3a0dY+k=[/tex]的浅盘中, 常压空气以 [tex=2.357x1.357]vEJnAIYg2GAVihTOifNHMA==[/tex]的速度垂直穿过物料层。空气 [tex=9.929x1.357]4TjcIENcUdtG27SHivF5Cd0UQcHcAg6Yd+vzVTTVQDxQXMXkM49dMDLVKdJ4ke6I[/tex] 绝干气, 物料的初始含水量为 [tex=6.286x1.357]db1IEWPSChJiwUQl42lgfVNLOZbeQWHOQaIJm4wfFVg=[/tex]绝干料。此 干燥条件下物料的 [tex=5.714x1.357]eHYuVVIX10GqweRAf4qhflrUl0FWed/dd0EhmT74IvY=[/tex]绝干料, [tex=2.571x1.071]Y6wX1g3TtZB+p1ZiMy3BGA==[/tex]。假设降速段干燥速率与物料含水量呈线性关系。试求[br][/br] 将 物料干燥至含水量为 [tex=4.286x1.357]x72FUlBzXnAzyntnfhyD3g==[/tex]绝干料所需的总干燥时间; [br][/br][br][/br]

对[tex=2.0x1.214]pEmb2IdSrWxRGQITqRecJw==[/tex] 某湿物料在恒定干燥条件下进行间歇干燥, 物料平铺在 [tex=4.786x1.143]XzXjlmVe+OYVlPxEPob/mXKgKCEWRtVEp/ac3a0dY+k=[/tex]的浅盘中, 常压空气以 [tex=2.357x1.357]vEJnAIYg2GAVihTOifNHMA==[/tex]的速度垂直穿过物料层。空气 [tex=9.929x1.357]4TjcIENcUdtG27SHivF5Cd0UQcHcAg6Yd+vzVTTVQDxQXMXkM49dMDLVKdJ4ke6I[/tex] 绝干气, 物料的初始含水量为 [tex=6.286x1.357]db1IEWPSChJiwUQl42lgfVNLOZbeQWHOQaIJm4wfFVg=[/tex]绝干料。此 干燥条件下物料的 [tex=5.714x1.357]eHYuVVIX10GqweRAf4qhflrUl0FWed/dd0EhmT74IvY=[/tex]绝干料, [tex=2.571x1.071]Y6wX1g3TtZB+p1ZiMy3BGA==[/tex]。假设降速段干燥速率与物料含水量呈线性关系。试求[br][/br] 将 物料干燥至含水量为 [tex=4.286x1.357]x72FUlBzXnAzyntnfhyD3g==[/tex]绝干料所需的总干燥时间; [br][/br][br][/br]

发布时间:2025-08-23 20:08:48
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答案:将干燥物料干燥至含水量为 [tex=4.286x1.357]x72FUlBzXnAzyntnfhyD3g==[/tex] 绝干料 由[tex=3.286x1.071]tT2vVxU0E3tA1+zrFH7Wnp5I3pj8gGqNFZK7MBPTjKc=[/tex] 和 [tex=6.429x1.357]OwAKPlhqOmyswQEUniHBuUcbB9vGoyWS+8DYj+qZAeU=[/tex]绝干气在[tex=2.071x1.143]aXb5bJSBNonIm9yC/gh4hA==[/tex] 图上查得[tex=4.571x1.286]dLsN+S1qr8xadSOQXnoHf2/bhst9azQsPqXcp+wmSwY=[/tex], 再查得 [tex=6.143x1.357]89vyAB1ZkagK0PIFDtXI25lneNHYtZe1IjMW1xFDxeQ=[/tex]又 [tex=3.286x1.071]tT2vVxU0E3tA1+zrFH7Wnp5I3pj8gGqNFZK7MBPTjKc=[/tex]和[tex=6.429x1.357]OwAKPlhqOmyswQEUniHBuUcbB9vGoyWS+8DYj+qZAeU=[/tex] 绝干气的湿空气的比容[tex=23.286x5.786]ifE9NWj3X6IpRVSt3T5IThlU6oVNoLHOqWOs/ncYG2vYlElO9SRjPhkq8hTSSsPZcDzwIeqIQih7HV50wZW8vMxmrsRx8HXqZoXassO8Y36chpGF22GvTs856wri6xKqiGL3neFQYaPLGaawXlTMRvFL6InMXMaRqOKK7SGZWfu0mkvtq4rbAKqZZdcppXh00I1M9pRhXRic+GgYG3ubTkBtFLJbVNrOQbwFwfQ/6eKurkIRmYlzrYMQvsxOWRq4pu8lE1sBjGn2UNsfRfE1qAcL6DFo12AlFfGaFS2P/xn6cOdpu12f52tl4L1r2E7f[/tex][br][/br][tex=11.929x1.286]8eP0JOKVJdhzwMDz4/0rSRhmC9hvOGg7gL2mbZvFXmE1q6DB0Z0q3Dj7joBsfoKQ[/tex]湿空气的密度[tex=22.143x2.143]idXbFoYQjiDU8W1QohnCsBk+cr5JBgWR/C4fRGPeRrUAu4uwD4fsfLRGA3fFKVirK2XLzL7yuLwm5R1oTkTk5yu/AfYSFb/DiS7+UkdHoEit6V04Qj1RNzwqPcnpoGQn[/tex]湿空气的质量流速[tex=18.286x1.571]dAqPomm3HJqe6YKJQLzy5uc0Ygd7MkfoBMw6vtTjO7UXbnFCMPHzQNzv/MYtkROr9V5avXM0n2YMq8UVLpu2lxAFnvny/FAe8LBDny4kV4Pe5co0KM6rA5p3LNRLQDGx[/tex]当空气垂直流过静止的物料表面时[tex=21.357x1.643]deOMVGNmqNr26xPc4JfIzfzHe0BCOgNhpQOn6nW8ZSPvI1OvcVXs7Du0RMLz+yWdfnn5I4neoe8sILHVBh0CXod5tDNfMWbMJqccDc3ScDpgF1p8fvWyRKOX61a/BQ3CzvF2ZU8VvIMvcmu4FHGdFEe76OiNfaUfsADTXzrSIKo=[/tex]又绝干物料质量[tex=21.5x2.357]Y6TFuGYYjBQfQuiEXsi3VyLxh+WZYg1pAJK9T5ZLoRodEwLjqixa5yEoLS3ExP/jz9m/DgVKw/XJU/HuB+v9IGELXUsJhbI9COg7HBO/wPQyeoTN7iZh7JSujCnZL72wh7JJ5oWu6lpr1VWNks9TpA==[/tex]恒速干燥阶段干燥时间[tex=27.929x2.714]LSm8IQuUpCATG2ZCl70MPpXZUORrMJNSpoZU7cmanKKeNH3LqxFjiMQ3OkNuy0jyBH2VVgLTk+pBuIcSWvrdXJ6PbHqVMBLXLh4QZu+mu+9ewBnZwBqCk4vK7dfuiHCKVrIlZAJWmJGHaK8tFuRBXzDh5E04RTyxS+7zPbtoVMHMR5LgjCO3yxFVcoxpFjWSKm856MrFyGsOr7SjPYFq+xFO0LyjfzmqK1B/nO9DFZUT4B3vr2gc30b2948J8KWIGAN8x01YUWlWQIJn2Dc8kA==[/tex]降速干燥阶段[br][/br]当 [tex=2.571x1.071]Y6wX1g3TtZB+p1ZiMy3BGA==[/tex], 且降速干燥速率和物料含水量呈线性关系, 则[tex=31.214x2.714]j/dC30buGL6ck+YWoxG2wxLG/C+/ruo9ubfXBbOBuyolEJ2WHjODWIOGqUqQoe/4Xn3rjE6/MRySYBQ7UrBXBnEatnseQYC7uX2qpwXIEhOg+obPQGq3Cdwt05m3cdAuN5kZ2UXNrpmHPU13y0WTjIYfgpbmV7mi/X+ZFyMoPL51dln8tvlkngxm4YqkXcn/6NQ03GDZioROuhGikx6RMVcdIxfwsMV0sp1fpEHFerBoOZW7H23s+vt9LXfknP7BgGOvSsyNbIcaWUiDUsq6ryEddBZOnKDOhuuqkMWG/vE=[/tex]总干燥时间[tex=12.143x1.214]bhOvJ2urLh9jUa/nUXPjN8jOxFlKJSf5ioTjBORZeLFBefoNim0Tbl3CODTYKLPu[/tex]
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