解读热风炉的工作原理与应用范围

时间:2019年04月26日信息来源:热风炉厂家 点击: 收藏此文 【字体:

一、工作原理:1、直接式高净化热风炉:采用燃料直接燃烧,经高净化处理形成热风,而和物料直接接触加热干燥或烘烤。该种方法燃料的消耗量约比用蒸汽式或其他间接加热器减少一半左右。因此,在不影响烘干产品品质的情况下,完全可以使用直接式高净化热风。
1. Working principle: 1. Direct high purity hot blast stove: direct combustion of fuel, high purity treatment to form hot air, and direct contact with materials for heating, drying or baking. The fuel consumption of this method is about half that of steam or other indirect heaters. Therefore, without affecting the quality of drying products, direct high purity hot air can be fully used.
燃料可分为:
Fuels can be divided into:
① 固体燃料,如煤、焦炭。
Solid fuels, such as coal and coke.
② 液体燃料,如柴油、重油
(2) Liquid fuels, such as diesel oil and heavy oil
③ 气体燃料,如煤气、天然气、液体气。
Gas fuels, such as gas, natural gas and liquid gas. 燃料经燃烧反应后得到的高温燃烧气体进一步与外界空气接触,混合到某一温度后直接进入干燥室或烘烤房,与被干燥物料相接触,加热、蒸发水分,从而获得干燥产品。为了利用这些燃料的燃烧反应热,必须增设一套燃料燃烧装置。如:环亚app燃烧器、燃油燃烧器、煤气烧嘴等。
The high-temperature combustion gases obtained by combustion reaction further contact with the outside air, mix to a certain temperature and then directly enter the drying chamber or baking room, contact with the dried materials, heat and evaporate water, so as to obtain the dried products. In order to utilize the reaction heat of combustion of these fuels, a set of fuel combustion devices must be added. Such as: coal burner, fuel burner, gas burner, etc.

2、间接式热风炉
2、间接式热风炉
主要适用于被干燥物料不允许被污染,或应用于温度较低的热敏性物料干燥。如:奶粉、制药、合成树脂、精细化工等。此种加热装置,即是将蒸气、导热油、烟道气等做载体,通过多种形式的热交换器来加热空气。
It is mainly suitable for drying materials which are not allowed to be polluted, or for drying heat sensitive materials with lower temperature. For example: milk powder, pharmaceuticals, synthetic resin, fine chemical industry, etc. The heating device uses steam, heat conducting oil and flue gas as carriers to heat air through various forms of heat exchangers.
间接式热风炉的^本质问题就是热交换。热交换面积越大,热转换率越高,热风炉的节能效果越好,炉体及换热器的寿命越长。反之,热交换面积的大小也可以从烟气温度上加以识别。烟温越低,热转换率越高,热交换面积就越大。
The essential problem of indirect hot blast stove is heat exchange. The larger the heat exchange area, the higher the heat transfer rate, the better the energy saving effect of the hot blast stove, and the longer the life of the furnace body and heat exchanger. Conversely, the size of heat exchange area can also be identified from flue gas temperature. The lower the smoke temperature, the higher the heat transfer rate and the larger the heat exchange area.

3、间接式热风炉分类:
3. Classification of indirect hot stoves:
工作原理可分为蓄热式和换热式两种:
The working principle can be divided into two types: regenerative type and heat exchange type.

蓄热式,按热风炉内部的蓄热体分球式热风炉(简称球炉)和采用格子砖的热风炉,按燃烧方式可以分为顶燃式,内燃式,外燃式等几种。如何提高风温,是业内人士长期研究的方向。常用的办法是混烧高热值燃气,或增加热风炉格子砖的换热面积,或改变格子砖的材质、密度,或改变蓄热体的形状(如蓄热球),以及通过种种方法将煤气和助燃空气预热。
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.
优点:换热温度高,热利用率高。
Advantages: high heat transfer temperature and high heat utilization rate.
缺点:体积大,占地面积大,热风温度不稳定,切换机构多,容易出问题,蓄热体寿命短,维修成本高,购置成本极高。
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.

换热式,主是使用使用耐高温换热器为核心部件,此部件不能使用金属材质换热器,只能使用耐高温陶瓷换热器,燃气气在燃烧室内充分燃烧,燃烧后的热空气,经过换热器,把热量换给新鲜的冷空气,可使新鲜空气温度达到1000度以上。
Heat exchanger mainly uses heat exchanger as its core component. It can not use metal heat exchanger, but high temperature ceramic heat exchanger. Gas can be fully burned in the combustion chamber. After combustion, hot air can be exchanged for fresh cold air through heat exchanger, which can make the temperature of fresh air reach more than 1000 degrees.
优点:换热温度高,热利用率高,体积小,热风温度稳定,无切换机构多,寿命长,维修成本高,购置成本低。
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.
缺点:换热温度没有蓄热式高,出现较晚,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.


二、应用范围:
II. Scope of application:
1、化工和制药行业化学制品、化工产品和药品的制备和干燥;
1. Preparation and drying of chemical products, chemical products and pharmaceuticals in chemical and pharmaceutical industries;
2、涂装行业汽车、摩托车、集装箱、家电、印铁制罐等工业产品的烘烤漆,喷粉固化等;
2. Baking paint, powder spraying and solidification of industrial products such as automobiles, motorcycles, containers, household appliances, tin printing, etc.
3、纺织印染和无纺布行业 热定型、热熔染色、焙烘、热风拉幅;
3. Hot setting, hot melt dyeing, baking and hot air stretching in textile, dyeing and non-woven industries;
4、铸造行业型砂和砂芯烘干;
4. Drying of moulding sand and sand core in foundry industry;
5、磨具、磨料行业 、砂布和砂轮烘干;
5. Abrasive tools, abrasive industry, abrasive cloth and grinding wheel drying;
6、建材行业木材干燥、人造板、层压板烘干、石膏板烘干、玻璃纤维制品烘干;
6. Wood drying, wood-based panels, laminates drying, gypsum board drying, glass fiber products drying in building materials industry;
7、农产品、饲料及食品加工烘烤咖啡、茶叶、烟叶及蔬菜、谷物、挂面、水产品、鱼粉、豆粕等干燥;
7. Drying of roasted coffee, tea, tobacco leaves and vegetables, cereals, noodles, aquatic products, fish meal and soybean meal.
8、供暖工程 工业厂房及民用建筑采暖;
8. Heating engineering industrial plant and civil building;
9、焊接材料行业 焊条、焊剂烘干;
9. Welding rod and flux drying in welding material industry;
10、保温材料、玻璃钢行业 硅酸铝纤维制品、稀土保温、玻璃钢制品的烘干。
10. Thermal insulation materials, aluminium silicate fibre products in FRP industry, rare earth thermal insulation and drying of FRP products.
(作者:热风炉 编辑:admin)
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