廠傢分析我國目前熱風爐需要註意和改進之處

一、熱風爐燃燒室及上部爐床蓄熱效果差.具體表現為燒爐時燃燒室升溫慢，當燃燒室溫度達到1200℃時煙道溫度已經較高，無法繼續燒爐，否則煙道溫度超標且浪費大量燃料。但這時熱風爐燃燒室及上部爐床蓄熱有限，停燒燜爐後燃燒室溫度下降很快，需要頻繁燒爐。二、爐床溫度分佈極不均勻，轉換區溫度過低，該區域矽磚爐墻及矽磚爐床易損壞轉換區是指矽磚爐床向高鋁磚爐床成都收賬過渡區域。
Firstly, the regenerative effect of the combustion chamber and the upper bed of the hot blast stove is poor. The specific performance is that the temperature of the combustion chamber rises slowly while burning the stove. When the temperature of the combustion chamber reaches 1200 C, the flue temperature is already high and the stove can not continue burning, otherwise the flue temperature exceeds the standard and a lot of fuel is wasted. But at this time, the heat storage of the combustion chamber and the upper bed of the hot blast stove is limited. After stopping the oven, the temperature of the combustion chamber drops rapidly, which requires frequent burning.
2. The temperature distribution in the furnace bed is extremely uneven, and the temperature in the conversion zone is too low. The silica brick wall and the silica brick furnace bed in this area are liable to be damaged.
The conversion area refers to the transition area from the silica brick hearth to the high alumina brick hearth.
熱風爐保溫時隻能小負荷燒爐，大負荷燒爐將造成煙道溫度失控。液化石油氣小負荷燒爐時成都找人公司煙氣量很小，熱煙氣沿熱風爐中心軸自上部燃燒器快速到達爐床，難以實現全爐床覆蓋，造成爐床中心部分溫度較高，而靠近爐墻部分升溫困難，長時間保溫過程中轉換區靠近爐墻部位溫度持續下降，甚至降低到600℃以下。570~600℃是矽磚成都收賬相變溫度區間，溫度低於這一溫度將損壞矽磚。當高爐復產第一次送風後，熱風爐轉換區靠近爐墻部位將降至更低溫度。煤氣正常後將大負荷燒爐，這時轉換區靠近爐墻部位又將自550℃左右急劇升溫，這是矽磚爐床及矽磚爐墻最忌諱收賬狀況。這將極有可能造成矽磚損壞，從而影響熱風爐爐床成都找人公司透氣性或造成爐墻的結構性破壞。
When the hot stove is kept warm, it can only burn at low load, and the high load furnace will cause the flue temperature to run out of control. Liquefied petroleum gas (LPG) low-load burner has a very small amount of flue gas. Hot flue gas quickly reaches the hearth from the upper burner along the central axis of the hot blast stove, which makes it difficult to cover the whole hearth. As a result, the temperature of the hearth is higher in the central part of the hearth, but it is difficult to raise the temperature near the hearth wall. During the long-term heat preservation process, the temperature of the transition zone near the hearth wall keep Or even below 600 degrees Celsius. 570~600 C is the phase transition temperature range of silica brick, and the temperature below this temperature will damage the silica brick. When the blast furnace is resumed for the first time, the transition zone near the furnace wall will fall to a lower temperature. When the gas is normal, the furnace will be burned with heavy load. At this time, the temperature of the conversion zone near the furnace wall will rise sharply from 550 C. This is the most taboo condition of the silica brick furnace bed and the silica brick furnace wall. This will most likely cause damage to silica brick, which will affect the permeability of hot blast stove hearth or cause structural damage to furnace wall.
三、燃料消耗過大，保溫成本較高
Three. Excessive fuel consumption and high cost of heat preservation.
由於熱風爐燃燒器是基於高爐煤氣的理化參數設計的，燃燒器的結構無法改變，改用液化石油氣保溫燒爐時的燃燒工況很難調配到比較理想的狀態。這是造成成都找人公司蓄熱狀況不佳、溫度分佈不均勻的主要原因。為瞭保證成都***的基本溫度，需要頻繁燒爐，浪費燃料。由於燃燒狀況不理想，容易造成不完全燃燒，也造成燃料浪費及安全隱患。
Because the burner of hot blast stove is designed based on the physical and chemical parameters of blast furnace gas, the structure of burner can not be changed, so it is difficult to adjust the combustion condition to the ideal state when converting to LPG thermal insulation burner. This is the main reason causing poor heat storage and uneven temperature distribution in hot blast stove. In order to ensure the basic temperature of the hot blast stove, it is necessary to burn the stove frequently and waste fuel. Because the combustion condition is not ideal, it is easy to cause incomplete combustion, and also cause fuel waste and safety hazards.
四、由於不完全燃燒可能造成爐床中部溫度過高
Four. Incomplete combustion may cause high temperature in the middle of the hearth.
由於溫度分佈不均勻，成都***中心部位溫度較高，溫度計所在爐墻部位溫度較低，中心區域的實際溫度可能大大高於燃燒室溫度計的測定溫度。液化石油氣的熱值極高，是高爐煤氣的35倍，當出現不完全燃燒工況時，可能造成熱風爐中心區域的實際溫度達到1500℃以上的情況，而燃燒室溫度計卻無法測出。
Because of the uneven temperature distribution, the higher temperature in the central part of the hot blast stove and the lower temperature in the wall part of the thermometer, the actual temperature in the central area may be much higher than the measured temperature of the combustion chamber thermometer. Liquefied petroleum gas (LPG) has a very high calorific value, which is 35 times higher than blast furnace gas. When incomplete combustion occurs, it may cause the actual temperature in the central area of hot blast stove to reach more than 1500 C, but the combustion chamber thermometer can not measure it.
局部爐床溫度過高造成格子磚軟化變形透水地坪損壞，嚴重影響熱風爐的透氣性。廣東某鑄造廠的熱風爐就出現上部爐床格子磚燒流的情況，隻好涼爐拆除爐床後重新砌築。
The temperature of the local hea印花地坪rth is too high, resulting in the softening and deforming of the checker brick, which seriously affects the air permeability of the hot stove. A hot blast stove in a foundry in Guangdong Province had to be rebuilt after removing the upper grate brick.
造成以上幾種不良工況的主要原因在於熱風爐改變燃料後的燃燒狀況不佳。如何使液化石油氣能夠與熱風爐燃燒器科學匹配是解決問題的關鍵。盲目使用液化石油氣進行熱風爐長時間保溫燒爐，可能造成熱風爐爐床格子磚及矽磚爐墻的巨大損壞。
The main reason for the above bad conditions is that the combustion condition of the stove after changing the fuel is not good. How to make liquefied petroleum gas (LPG) can be scientifically matched with the burner of hot blast stove is the key to solve the problem. Blind use of liquefied petroleum gas (LPG) for long-term heat preservation of hot blast stove may cause great damage to lattice bricks and silica brick walls of hot blast stove bed.
利用液化石油氣（或液化天然氣）進行熱風爐燒爐的技術難度較大，需要真正懂行的專業技術人員實施才能達到安全、可靠、保護爐子、降低成本的效果。
It is difficult to use liquefied petroleum gas (or liquefied natural gas) for hot-blast stove burning. It needs professional technicians who really know how to implement it in order to achieve the effect of safety, reliability, protection and cost reduction.