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-> 行業(yè)資訊－ 高頻焊翅片管VS整體型翅片管的優(yōu)缺點對比
發(fā)布時間：(2018/11/8)
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高頻焊翅片管VS整體型翅片管的優(yōu)缺點對比 |
高頻焊翅片管和整體型翅片管都是翅片管的一種，雖然作用差不多，但在外觀以及性能特點等方面還是有所區(qū)別的，所以適用不同的場合，今天中國翅片管網(wǎng)就來具體介紹一下高頻焊翅片管的缺點與整體型翅片管的優(yōu)點，內(nèi)容如下。
High frequency welded finned tube and integral finned tube are one kind of finned tube. Although their functions are similar, they are different in appearance and performance characteristics. So they are suitable for different occasions. Today, China finned tube network will introduce the shortcomings of high frequency welded finned tube and the advantages of integral finned tube. As follows.
1.高頻焊翅片管的缺點
1. disadvantages of high frequency welded finned tubes
(1)由于工藝限制，翅片間距大，最小間距4mm，翅片高度最高55mm，一般空冷器鋁翅片是2.3mm，翅片間距57mm，所以，翅化比低，最大只有13左右，正常軋片或者脹片是23 左右，也就是說相同的基管面積，翅片面積小只有鋁翅片的55%左右，換熱效果有限。
(1) Due to technological limitations, the fin spacing is large, the minimum spacing is 4 mm, the fin height is the highest 55 mm, the general air cooler aluminum fin is 2.3 mm, the fin spacing is 57 mm, so the finning ratio is low, the maximum is only about 13, the normal rolled or expanded fin is about 23, that is to say, the same base tube area, the fin area is only 55% smaller than the aluminum fin. The heat transfer effect is limited.
(2)翅片為鋼片或不銹鋼片，片較厚，最薄0.8mm，而鋁片是0.3—0.45mm左右，翅片熱效率差，如果是不銹鋼翅片，由于不銹鋼換熱效率更差，所以傳熱效率低。
(2) The fins are made of steel or stainless steel. The fins are thicker and the thinnest is 0.8mm, while the aluminium fins are about 0.3-0.45mm. The thermal efficiency of the fins is poor. If the fins are made of stainless steel, the heat transfer efficiency of stainless steel fins is lower because the heat transfer efficiency of stainless steel fins is worse.
(3)高頻焊翅片，雖然接觸熱阻小，但是翅片面積有限，翅片厚換熱差，所以，翅片管的整體熱效率不高，除了一些特殊工藝，一般情況使用較少。
(3) Although the contact thermal resistance of high frequency welded fins is small, the fin area is limited and the fin thickness and heat transfer are poor. Therefore, the overall thermal efficiency of finned tubes is not high. In addition to some special processes, they are generally used less.
(4)基于上述介紹，高頻焊接翅片管用在空冷器上是不合適的，除非使用溫度高于500℃的情況。但是基于其防腐比較好，比如不銹鋼翅片—不銹鋼基管，在甲醇合成蒸發(fā)冷的應用，是可以采用的，但是，其換熱效率就大打折扣，只有鋁片的45%左右，所以其節(jié)水效果差。
(4) Based on the above introduction, it is inappropriate for high frequency welded finned tubes to be used in air coolers unless the temperature is higher than 500 C. However, based on its good anti-corrosion, such as stainless steel fin-stainless steel base tube, it can be used in methanol synthesis evaporative cooling. However, its heat transfer efficiency is greatly reduced, only about 45% of the aluminium sheet, so its water-saving effect is poor.
2.整體型翅片管的優(yōu)點
2. advantages of integral fin tube
(1)能夠擴展換熱效果。
(1) the heat transfer effect can be expanded.
(2)耐磨
(2) wear resistance
由于整體型翅片管翅片與基管為一體成型，晶體結(jié)構(gòu)一致，性能穩(wěn)定，況且翅片呈沙丘形狀，與在受熱時溫度梯度形狀吻合，在受熱時翅片外表面溫度一致，熱應力均勻，不會產(chǎn)生集中，也就不會產(chǎn)生強度薄弱點，另外，翅片對煙氣具有導流作用，導流的同時，使煙氣的各項指標更加均勻，不會產(chǎn)生煙氣偏流，也就不會造成煙氣集中沖刷某一區(qū)域或某一部位，因此比較耐磨。
Because the integral fin tube fin and the tube are formed as one body, the crystal structure is consistent, the performance is stable, and the fin is dune-shaped, which is consistent with the temperature gradient shape when heated. When heated, the outer surface temperature of the fin is the same, the thermal stress is uniform, there will be no concentration, and there will be no strength weakness. In addition, the fin is similar to the temperature gradient shape when heated. It can divert the flue gas. At the same time, it can make the flue gas index more uniform. It will not produce flue gas deviation, and it will not cause the flue gas to concentrate on scouring a certain area or a certain part, so it is more wear-resistant.
(3)不積灰
(3) not accumulating ash
積灰的原因是卡門渦流造成的：煙氣流過管子時，在管子的背面會形成負壓區(qū)，在此區(qū)域，煙氣流速為零甚至回流，煙氣就在此積聚，灰份就附著在管子表面�；曳莸臒嶙璞容^大，灰越積越厚，熱阻越來越大，傳熱量越來越少，排煙溫度升高了，鍋爐的效率也就下降了。翅片管對煙氣的導流克服了卡門渦流，同時也梳理了灰份的分布，使其在煙氣中分布均勻。
The reason of ash accumulation is caused by Carmen eddy current: when the smoke flows through the pipe, a negative pressure zone will be formed on the back of the pipe. In this area, the smoke velocity is zero or even reflux, where the smoke accumulates and the ash is attached to the surface of the pipe. Greater thermal resistance of ash, thicker ash accumulation, greater thermal resistance, less heat transfer, higher exhaust temperature, and lower boiler efficiency. The finned tube's diversion to the flue gas overcomes the Karman eddy current, and combs the ash distribution to make it distribute evenly in the flue gas.
(4)傳熱性能穩(wěn)定
(4) stable heat transfer performance
一體型結(jié)構(gòu)作為受熱面，在多年運行情況下，鍋爐排煙溫度起伏變化不大，沒有省煤器管爆管現(xiàn)象發(fā)生。
As a heating surface, the flue gas temperature fluctuates little during many years of operation, and no tube burst of economizer occurs.
(5)使用壽命長
(5) long service life
同等運行狀況下，翅片管保證壽命大于光管的2倍。一般情況下，光管壽命3—4年,則翅片管壽命至少7—8年。
Under the same running condition, the life of the finned tube is 2 times higher than that of the light tube. Generally speaking, the life span of light tube is 3 to 4 years, and the life of finned tube is at least 7 to 8 years. 辛苦整理.轉(zhuǎn)載請注明http://www.wxsxsjx.com無錫鑫盛源鋼管有限公司專業(yè)生產(chǎn):方管,矩形管,焊管等一系列高頻焊管產(chǎn)品,方管規(guī)格：40～200之間任意變形,矩形管規(guī)格：50～200之間任意變形,圓管規(guī)格：50～200之間任意變形.方管按生產(chǎn)標準分:國標方管,日標方管,英制方管,美標方管,歐標方管,非標方管等.方管價格,矩形管價格,焊管價格.方管行情,矩形管行情,焊管行情.行業(yè)資訊
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