蔬菜帶式干燥機(jī)方案設(shè)計(jì)書DW3.85×12.04
一、技術(shù)參數(shù):
1、網(wǎng)帶有效寬度:3.85m
2、網(wǎng)帶有效干燥長(zhǎng)度:12.04m
3、使用溫度:t1=100℃~120℃
4、排風(fēng)溫度:t2=60℃~70℃ (按60℃ 計(jì)算)
5、蒸汽壓力:P=0.4Mpa飽和蒸汽(飽和溫度T=151.1℃)
6、蒸發(fā)水量:W≈930 Kg/h
7、產(chǎn) 量:G2≈90Kg/h
8、處 理 量:G2=1020Kg/h
9、蒸汽耗量:D=2000 Kg/h~2200Kg/h
10、裝機(jī)功率:102.75Kw
11、網(wǎng)帶速度:0.2~0.1m/min(變頻調(diào)速)
12、主體設(shè)備外形尺寸:長(zhǎng)X寬X高=14.822mX5.32mX3.34m
二、設(shè)計(jì)參數(shù)
Design parameter
2.1、初含水率: ω1 =90%—92%(按92%計(jì)數(shù))
Initial water content:ω1=90%—92%(按92%計(jì)數(shù))
2.2、終含水率: ω2 =10%—12%(按10%計(jì)數(shù))
Finial water content:ω2=10%—12%(按10%計(jì)數(shù))
2.3、干燥熱風(fēng)溫度: t1 =100℃—120℃
Temp. of drying hot air: 100℃—120℃
2.4、產(chǎn)量 : G2 =90kg/h)
Production capactity: G2 =90 kg/h)
2.5、熱源表壓: 0.4Mpa飽和水蒸氣(飽和溫度T=151.1℃)
Heating way: 0.4Mpa saturated vapor(飽和溫度T=151.1℃)
2.6、海藻真密度: γ=1.08g/cm3
True density of fresh seawoods: 1.08g/cm3
2.7、海藻堆積密度:γw=0.33 g/cm3
Bulk density of fresh seawoods: 0.33 g/cm3
2.8、干海藻堆積密度:γg=0.24g/cm3
Bulk density of dry seawoods: 0.24 g/cm3
2.9、干燥設(shè)備材料要求: 物料經(jīng)過處及設(shè)備內(nèi)貼外包不銹鋼材質(zhì)
Material for equipment:
三、計(jì)算 Computation
3.1 小時(shí)脫水量
Water evaporated amount per hour
W= G2(ω1-ω2)/(1-ω1)≈930 kg/h
3.2 小時(shí)處理量
Handling capacity per hour
G1=G2+W=1020kg/h
3.3 鋪料厚度
Thickness of raw material:
帶式干燥機(jī)網(wǎng)板有效寬3.85米,有效干燥段長(zhǎng)12.04米,該帶機(jī)使用性能設(shè)定其全程干燥時(shí)間為60min—120min可調(diào),計(jì)算經(jīng)離心機(jī)脫水后含水率約90%—92%的物料鋪料厚度
Width of belt is 3 .85m, drying length is 12.04m, drying time is 60min—120min adjustable.
Δ60≤930×103/[330×(3.85×12.04)×(60/60)]≤6.0cm
Δ120≤12cm
3.4 小時(shí)耗熱量Q
Heat consumption per hour Q
根據(jù)蔬菜的物性,實(shí)驗(yàn)室模擬試驗(yàn)的有關(guān)數(shù)據(jù)及實(shí)踐調(diào)試經(jīng)驗(yàn),經(jīng)計(jì)算該帶機(jī)加熱器需補(bǔ)充的熱量為:Q=130X104kcal=544X104kJ/h
According to the test, heat supply quantity is 5440000KJ/h
蒸汽耗量2000 kg/h-2200 kg/h
Steam consumption: 2000 kg/h-2200 kg/h
3.5 翅片蒸汽換熱總面積
Total area of fins steam heat exchanger:
F= Q/K[(Δt1-Δt2)/ln(Δt1)/ Δt2)]=1890m2(計(jì)算過程略)
3.6 小時(shí)耗空氣體積V
Air consupmtion per hour V:
LV排氣=(air exhaust)=22000m3/h
LV循環(huán)=(air circulation) =160000m3/h
3.7 在60℃排風(fēng)時(shí)zui大含濕量:X2=? 、相對(duì)濕度:Φ2=?
設(shè)帶式使用地環(huán)境溫度t0=20℃、相對(duì)濕度Φ0=80%,大氣壓力P=760mmHg,則X0=0.0116k****/kg干空氣,露點(diǎn):td0=16.5℃。 當(dāng)排風(fēng)溫度:t2= 60℃時(shí),PS=148.791 mmHg,排風(fēng)zui大含濕量:X2=W/LV排氣+X0=0.05173k****/kg干空氣,露點(diǎn):td2=41℃。相對(duì)濕度Φ2