管殼式換熱器與(yu)管(guan)殼(ke)式(shi)換熱器(qi)的區(qu)別:管(guan)殼(ke)式(shi)換熱器(qi)在(zai)結構上與(yu)管(guan)殼(ke)式(shi)換熱器(qi)相同,但用途不同。在(zai)殼(ke)管(guan)式(shi)中(zhong),料液(ye)通過(guo)(guo)管(guan)程(cheng)(即管(guan)內(nei)),冷(leng)卻水通過(guo)(guo)殼(ke)程(cheng)(管(guan)與(yu)殼(ke)之間),殼(ke)程(cheng)與(yu)管(guan)內(nei)相反(fan)管(guan)的。
管(guan)(guan)(guan)(guan)殼式(shi)換(huan)熱(re)(re)器由(you)管(guan)(guan)(guan)(guan)殼、傳熱(re)(re)管(guan)(guan)(guan)(guan)束(shu)、管(guan)(guan)(guan)(guan)板(ban)(ban)(ban)、折(zhe)(zhe)流(liu)(liu)板(ban)(ban)(ban)(折(zhe)(zhe)流(liu)(liu)板(ban)(ban)(ban))和(he)管(guan)(guan)(guan)(guan)箱組(zu)成(cheng)。 外(wai)殼多(duo)(duo)為(wei)(wei)(wei)圓柱形(xing)(xing),內(nei)(nei)部有銷釘,銷釘的(de)兩(liang)(liang)端固定在管(guan)(guan)(guan)(guan)板(ban)(ban)(ban)上。 進行(xing)熱(re)(re)交換(huan)的(de)冷熱(re)(re)流(liu)(liu)體有兩(liang)(liang)種(zhong):一種(zhong)在管(guan)(guan)(guan)(guan)內(nei)(nei)流(liu)(liu)動(dong),稱(cheng)為(wei)(wei)(wei)管(guan)(guan)(guan)(guan)程流(liu)(liu)體; 另一部分流(liu)(liu)出管(guan)(guan)(guan)(guan)外(wai),稱(cheng)為(wei)(wei)(wei)殼程流(liu)(liu)體。 為(wei)(wei)(wei)了提(ti)高(gao)管(guan)(guan)(guan)(guan)外(wai)流(liu)(liu)體的(de)傳熱(re)(re)系數,通(tong)常(chang)在管(guan)(guan)(guan)(guan)殼內(nei)(nei)設置(zhi)若干折(zhe)(zhe)流(liu)(liu)板(ban)(ban)(ban)。 擋板(ban)(ban)(ban)可以提(ti)高(gao)流(liu)(liu)體在殼程的(de)流(liu)(liu)速(su),使流(liu)(liu)體按規(gui)定的(de)距離多(duo)(duo)次(ci)通(tong)過安全殼,增加流(liu)(liu)體的(de)湍(tuan)流(liu)(liu)度(du)。 換(huan)熱(re)(re)管(guan)(guan)(guan)(guan)可在管(guan)(guan)(guan)(guan)板(ban)(ban)(ban)上以等邊三角形(xing)(xing)或正方形(xing)(xing)為(wei)(wei)(wei)主(zhu)。 等邊三角形(xing)(xing)排列(lie)緊湊管(guan)(guan)(guan)(guan)殼式(shi)換(huan)熱(re)(re)器,管(guan)(guan)(guan)(guan)外(wai)流(liu)(liu)體湍(tuan)流(liu)(liu)大,傳熱(re)(re)系數大; 方形(xing)(xing)排列(lie)便于(yu)管(guan)(guan)(guan)(guan)外(wai)清洗(xi),適(shi)用于(yu)易結垢的(de)流(liu)(liu)體。
列管式換熱器結構簡單、緊湊、造價低廉,但不能對管外進行機械清洗。 換熱器用銷釘連接在管板上,管板分別焊接在殼體的兩端,并與頂蓋相連管(guan)殼式換熱器,頂蓋(gai)和殼(ke)體上(shang)設有進(jin)、出口(kou)管(guan)(guan)(guan)(guan)。一般(ban)在管(guan)(guan)(guan)(guan)外布置一系列垂直于安全殼(ke)的(de)擋板。 同(tong)(tong)時,管(guan)(guan)(guan)(guan)板與(yu)管(guan)(guan)(guan)(guan)殼(ke)的(de)連接是剛(gang)性的(de),內管(guan)(guan)(guan)(guan)和外管(guan)(guan)(guan)(guan)是兩(liang)種不(bu)同(tong)(tong)溫度(du)的(de)流體。 因此,當管(guan)(guan)(guan)(guan)壁與(yu)殼(ke)壁溫差較(jiao)大(da)時,由于兩(liang)者的(de)熱(re)(re)膨(peng)脹不(bu)同(tong)(tong),會產生較(jiao)大(da)的(de)溫差應力,使管(guan)(guan)(guan)(guan)子(zi)從管(guan)(guan)(guan)(guan)板上(shang)扭曲或松脫,并且甚(shen)至損壞換(huan)熱(re)(re)器。