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廠家總結間接式燃氣熱風爐知識【新手必讀】

 

間接式主要適用于不允許直接接觸干燥物料情況下,也適用于低溫干燥熱敏性物料。如︰奶粉、醫藥、合成樹脂、精細化工等。加熱是將蒸汽、導熱油和煙道氣裝置當做載體,通過各種熱交換器加熱空氣。間接基本原理是換熱。換熱面積越大,換熱率越高,節能效果越好,爐子和換熱器使用壽命越長。另一方面,換熱面積的大小也可以從煙氣溫度中識別出來。煙氣溫度越低,換熱速率越高,換熱面積越大。

Indirect gas-fired hot blast stove is mainly suitable for low temperature drying of thermosensitive materials when direct contact with drying materials is not allowed. For example: milk powder, medicine, synthetic resin, fine chemical industry, etc. Heating is a device that uses steam, heat conducting oil and flue gas as carriers to heat air through various heat exchangers. The basic principle of indirect hot stove is heat transfer. The larger the heat transfer area, the higher the heat transfer rate, the better the energy saving effect of the hot blast stove, and the longer the service life of the stove and heat exchanger. On the other hand, the size of heat transfer area can also be identified from the flue gas temperature. The lower the flue gas temperature, the higher the heat transfer rate and the larger the heat transfer area. 間接式分類在工作原理上可分為蓄熱式和換熱式兩種︰

The classification of indirect hot blast stoves can be divided into two types: regenerative type and heat exchange type.

蓄熱式,按內部的蓄熱體分球式(簡稱球爐)和采用格子磚的,按燃燒方式可以分為頂燃式,內燃式,外燃式等幾種。如何提高風溫,是業內人士長期研究的方向。常用的辦法是混燒高熱值燃氣,或增加格子磚的換熱面積,或改變格子磚的材質、密度,或改變蓄熱體的形狀(如蓄熱球),以及通過種種方法將煤氣和助燃空氣預熱。

Regenerative type, according to the regenerator inside the hot blast stove, divided into spherical hot blast stove (referred to as spherical furnace) and lattice brick hot blast stove, according to the combustion mode can be divided into top combustion, internal combustion, external combustion and other types. How to improve the wind temperature is a long-term research direction of the industry. The commonly used methods are mixing high calorific value gas, increasing the heat transfer area of lattice brick of hot blast stove, changing the material and density of lattice brick, or changing the shape of regenerator (such as regenerative ball), and preheating gas and combustion-supporting air by various methods.

優點︰換熱溫度高,熱利用率高。

Advantages: high heat transfer temperature and high heat utilization rate.

缺點︰體積大,佔地面積大,熱風溫度不穩定,切換機構多,容易出問題,蓄熱體壽命短,維修成本高,購置成本極高。

Disadvantages: large volume, large area, unstable hot air temperature, many switching mechanisms, easy to go wrong, short life of regenerator, high maintenance cost, high purchase cost.

換熱式,主是使用使用耐高溫換熱器為核心部件,此部件不能使用陶瓷金屬材質換熱器,只能使用耐高溫陶瓷換熱器,燃氣氣在燃燒室內充分燃燒,燃燒後的熱空氣, 經過換熱器,把熱量換給新鮮的冷空氣,可使新鮮空氣溫度達到1000度以上。

The heat exchanger mainly uses the heat-resistant heat exchanger as the core component. This component can not use the metal heat exchanger of the ceramic hot air stove. It can only use the heat-resistant ceramic heat exchanger. The gas is fully burned in the combustion chamber. After burning, the hot air can be exchanged for fresh cold air through the heat exchanger to make fresh air. The temperature is over 1000 degrees.

優點︰換熱溫度高,熱利用率高,體積。 確縹露任榷,無切換機構多,壽命長,維修成本高,購置成本低。

Advantages: high heat transfer temperature, high heat utilization rate, small volume, stable hot air temperature, no switching mechanism, long life, high maintenance cost, low purchase cost.

缺點︰換熱溫度沒有蓄熱式高,出現較晚,未被普遍使用。

Disadvantage: The heat transfer temperature is not as high as regenerative type, which appears later and is not widely used.

種類按工作原理可以分為直接式和間接式,那麼二者有什麼差別呢? 直接式與間接式的主要差別就是熱效率的不同,直接式熱風爐不用換熱,熱效率更高。間接式熱風爐需經過換熱器轉換,效率自然低一點。

The types of hot stoves can be divided into direct type and indirect type according to their working principles. What is the difference between them? The main difference between direct and indirect hot stoves is the difference in thermal efficiency. Direct hot stoves do not need heat transfer and have higher thermal efficiency. The indirect hot blast stove needs to be converted by heat exchanger, so its efficiency is naturally lower.


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