U形管式換熱器的基本特點(diǎn)是,只有一塊管板,管束由多根U型管組成,管的兩端固定在同一管板上,管子可以自由伸縮。當(dāng)殼體與U形換熱管有差別時(shí),不會(huì)產(chǎn)生熱應(yīng)力。
U形管式換熱器的基本參數(shù)(1)公稱直徑DN/mm
鋼管制圓筒:325,426;
卷制圓筒:400,500,600,700,800,900,1000,1100,1200。
(2)公稱壓力PN/MPa
1.0,1.6,2.5,4.0,6.4。
(3)換熱管的長度、規(guī)格及排列形式
換熱管的種類有光管和螺旋管,換熱管長度有3m和6m,換熱管的規(guī)格及排列形式見表
換熱管外徑*壁厚 | 排列形式 | 管心距 | |
碳素鋼、低合金鋼 | 不繡耐酸剛 | ||
19*2 | 19*2 | 正三角形、正方形旋轉(zhuǎn)45° | 25 |
25*2.5 | 25*2 | 32 |
(4)管程數(shù)
管程數(shù)取2,4。
(5)折流板(支撐板)間距S
L/m | DN | S | |||||
3 | ≤ 600 | 150 | 200 | / | / | / | / |
6 | ≤ 600 | 150 | 200 | / | 300 | / | / |
700-900 | 150 | 200 | / | 300 | / | 450 | |
1000-1200 | / | / | 200 | 300 | 350 | 450 |
U形管式換熱器的主要參數(shù)
DN | N | n | 中心排管數(shù) | 管程流通面積/㎡ | A/㎡ | |||||||
d | D*δt | L=3m | L=6m | |||||||||
19 | 25 | 19 | 25 | 19*2 | 25*2 | 25*2.5 | 19 | 25 | 19 | 25 | ||
325 | 2 | 38 | 13 | 11 | 6 | 0.0067 | 0.0045 | 0.0041 | 13.4 | 6.0 | 27.0 | 12.1 |
4 | 30 | 12 | 5 | 5 | 0.0027 | 0.0021 | 0.0019 | 10.6 | 5.6 | 21.3 | 11.2 | |
426 400 | 2 | 77 | 32 | 15 | 8 | 0.0136 | 0.0111 | 0.0100 | 26.9 | 14.7 | 54.5 | 29.8 |
4 | 68 | 28 | 8 | 7 | 0.0060 | 0.0048 | 0.0044 | 23.8 | 12.9 | 48.2 | 26.1 | |
500 | 2 | 128 | 57 | 19 | 10 | 0.0227 | 0.0197 | 0.0179 | 44.6 | 26.1 | 90.5 | 53.0 |
4 | 114 | 56 | 10 | 9 | 0.0101 | 0.0097 | 0.0088 | 39.7 | 25.7 | 80.5 | 52.1 | |
600 | 2 | 199 | 94 | 23 | 13 | 0.0352 | 0.0326 | 0.0295 | 69.1 | 42.9 | 140.3 | 87.2 |
4 | 184 | 90 | 12 | 11 | 0.0163 | 0.0155 | 0.0141 | 63.9 | 41.1 | 129.7 | 83.5 | |
700 | 2 | 276 | 129 | 27 | 15 | 0.0492 | 0.0453 | 0.0411 | / | / | 194.1 | 119.4 |
4 | 258 | 128 | 12 | 13 | 0.0228 | 0.0221 | 0.0201 | / | / | 181.4 | 118.4 | |
800 | 2 | 367 | 182 | 31 | 17 | 0.0650 | 0.0630 | 0.0571 | / | / | 257.7 | 168.0 |
4 | 346 | 176 | 16 | 15 | 0.0306 | 0.0304 | 0.0276 | / | / | 242.8 | 162.5 | |
900 | 2 | 480 | 231 | 35 | 19 | 0.0850 | 0.0800 | 0.0725 | / | / | 336.2 | 212.8 |