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　　機械專業(yè)英語對照漢語的文章

Three crossflow (No.1-No.3) dryers were tested. Dyer No.1 contains two crossflow columns, each column consists of two drying sections, one turn-flow device and a cooling section, and with a grain column thickness in the upper drying section of 0.277m and 0.304m in the lower section. The dimensions of dryer No.1 are 6.517m×3.400m×13.482m. No.2 dryer is similar to No.1, but is smaller and has a lower capacity. No.3 is a cylindrical crossflow dryer with two drying sections, one turn-flow device and a cooling section.

The mixed-flow dryer (No.4) is composed of eight modular sections. Each module has dimensions of 1.8m×1.0m×0.8m. The tow bottom modules serve as cooling stage. Dryer No.5 consists of two mixed-flow drying towers in series, similar in design as dryer No.4.

Dryers No.6-No.10 are concurrent-/counter-flow dryers, consisting of two or more towers. The number in front of “-CCF” indicates the number of towers. Each tower has two counter-/concurrent-flow drying sections. The last tower, or part of the last tower, is used for cooling. The depth of the counter-/concurrent-flow beds is 0.6m, the cross-sectional area of each tower is 2.2m×2.2m. It should be noted that overseas CCF dryers do not have counter-flow drying stages, only a counter-flow cooling stage.

The steam dryer is a unique dryer widely used in grain depots in China. It consists of 3-6 indoor drying and cooling towers, and a boiler. Each tower contains in its upper section a series of steam pipes, and in its lower section a number of inlet/outlet air ducts. The grain is heated by conduction as it flow over the steam-heated pipes, and is subsequently treated with ambient or slightly-heated recycled drying-air. The steam pressure in the pipes is 2×105Pa--4×105Pa (130-140℃), the diameter of the pipes is 42-48mm, and the distance between pipes is 110-120mm. The grain retention time is long (4-6 hours for 10-point moisture removal) due to the relatively low grain temperature.

Sun drying is still the main method of grain drying in China. Almost every village or depot has a special area for the sun drying of grains. The grain is spread out in 5-10cm thin layer and is stirred occasionally. In Northeast China where the ambient temperature is very low when maize is harvested, sun drying is a very slow process.

三橫(一號至三號)烘干設(shè)備進行了測試. 戴先生no.1包含兩個橫欄,每欄分為兩部分干燥, 一轉(zhuǎn)流器及冷卻段, 與糧食柱厚度在上部干燥部分0.277m和0.304m在下游. 尺寸干燥器一號是6.517m×3.400m×13.482m. 二號烘干機相似一號,但規(guī)模較小,具有容量較低. 第三是橫向圓筒烘干機烘干兩部分,一部分是轉(zhuǎn)流裝置和冷卻段. 混流式干燥機(四號)是由八個單元章節(jié). 每個單元尺寸1.8×1.0×0.8米. 拖車底部模塊作為冷卻階段. 干燥器no.5分為兩個混流干燥塔系列,類似的設(shè)計作為烘干四號. 干衣no.6-no.10都是concurrent-/counter-flow烘干機,由兩個或兩個以上的彈孔. 數(shù)年前的"框架",表明了很多水塔. 每個塔有兩個counter-/concurrent-flow曬路段. 最后塔,或部分上塔,是用于冷卻. 有深度的counter-/concurrent-flow病床0.6m,橫截面的每個塔有2.2m×2.2m. 應(yīng)當(dāng)指出,海外ccf干衣沒有反流干燥階段,只有一個反流冷卻階段. 蒸氣烘干是一個獨特的烘干機廣泛用于糧庫中. 它由3-6室內(nèi)干燥,冷卻水塔,一臺鍋爐. 每個塔載在其上部一系列的蒸汽管道, 而在其下游的一系列進/出水口風(fēng)筒. 谷物的熱傳導(dǎo),因為它流了蒸汽加熱管, 并隨后處理空氣或微循環(huán)加熱干燥的空氣. 蒸汽壓力管道2×105pa--4×105pa(130-140℃),直徑較小的管材是42-48mm, 之間的距離和管道是110-120mm. 糧食停留時間很長(4-6小時,10點去濕)由于相對較低的糧食溫度. 晾曬仍然是主要的方法谷物干燥中. 幾乎每一個村或倉庫具有特殊的地區(qū),以供晾曬谷物. 糧食是分布在5-10cm薄層,偶爾攪拌. 在東北那里的氣溫很低,當(dāng)玉米收割, 太陽曬是一個非常緩慢的過程