燃料氣與空氣的混合物在燃燒焰面法線方向的速度分量大于該混合物的火焰?zhèn)鞑ニ俣龋瑒t火焰被推出火孔，開始離焰，直到火焰被吹跑造成火焰熄火——脫火。燃燒器發(fā)生脫火是不允許的。

The velocity component of the mixture of fuel gas and air in the normal direction of combustion flame is larger than that of the mixture, and the flame is pushed out of the fire hole and starts to leave the flame until the flame is blown away, causing the flame to go out. It is not allowed to remove fire from the burner.

按爐溫分布，爐膛沿長度方向分為預(yù)熱段、加熱段和均熱段。進(jìn)料端爐溫較低為預(yù)熱段，其作用在于利用爐氣熱量，以提高爐子的熱效率。加熱段為主要供熱段，爐氣溫度較高，以利于實(shí)現(xiàn)快速加熱。

According to the distribution of furnace temperature, the furnace is divided into preheating section, heating section and uniform heating section along the length direction.

The lower temperature of the feed end is the preheating section, and its function is to increase the heat efficiency of the furnace by utilizing the heat of the furnace gas.

The heating section is the main heating section, and the furnace gas temperature is relatively high, which is conducive to rapid heating.

轉(zhuǎn)底式加熱爐

爐身固定，爐底轉(zhuǎn)動(dòng)，放置在爐底上的料坯隨爐底轉(zhuǎn)動(dòng)由進(jìn)料口移送到出料口。根據(jù)爐底的形狀，轉(zhuǎn)底式加熱爐可分為環(huán)形爐和盤形爐兩種，冶金廠軋鋼車間多用環(huán)形爐。

Bottom reheating furnace

The furnace body is fixed and the bottom of the furnace is rotated, and the billet placed on the bottom of the furnace is transferred to the discharge port from the feed inlet with the rotation of the furnace bottom. According to the shape of the furnace bottom, the rotary hearth furnace can be divided into two types: the annular furnace and the disc type furnace.

臺車式加熱爐的結(jié)構(gòu)一般是由輻射室、對流室及煙囪組成。輻射室也就是燃燒室，將燃料放進(jìn)輻射室進(jìn)行燃燒產(chǎn)生高溫，以對傳播熱的方法持續(xù)將局部熱量傳給對流室爐管內(nèi)活動(dòng)著的油品。然后通過對流室和煙囪將油品和煙中的熱量進(jìn)行吸收，傳遞給產(chǎn)品。

The structure of the trolley type heating furnace is generally of a radiation chamber, a convection chamber and a chimney. The radiation chamber is also the combustion chamber, which puts the fuel into the radiation chamber for combustion to produce high temperature, and continuously transfers the local heat to the oil moving in the convection chamber furnace tube by means of heat transmission. Then the heat and oil in the oil and smoke are absorbed and transmitted to the product through the convection chamber and the chimney.