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          當前位置:首頁 > 技術知識 > 熱風爐廠家為你講解不同類型的熱風爐的的優缺陷

          熱風爐廠家為你講解不同類型的熱風爐的的優缺陷

          文章出處:   發布時間:2019-08-29 13:26:20   瀏覽:47

          熱風爐作為熱動力機械的熱風爐于20世紀70年代末在我國開始廣泛應用,它在許多行業已成為電熱源和傳統蒸汽動力熱源的換代產品,而大家知道各種類型的熱風爐的優點缺點嗎,接下來天然氣熱風爐廠家給大家介紹下各種類型的熱風爐的優點缺點。
          Hot blast stove, as a hot blast stove of thermodynamic machinery, has been widely used in China since the end of 1970s. It has become a replacement product of electric heat source and traditional steam power heat source in many industries. Do you know the advantages and disadvantages of various types of hot blast stoves? Then Huashuai natural gas hot blast stove will introduce various types to you. Advantages and disadvantages of hot stove. 1.鑄鐵管式熱風爐,不能承受高溫高壓,供給的風溫很低,已被淘汰。
          1. Cast iron tubular hot-blast stove can not withstand high temperature and pressure, and the air temperature supplied is very low, which has been eliminated.
          2.內燃式熱風爐雖然通過改進耐火材料等措施可為高爐提供1000℃以上的風溫,但由于這種熱風爐是由燃燒室和蓄熱室組成,中間用隔墻分開,而隔墻在燃燒和送風過程中產生溫度波動,尤其是下部溫差很大,在各種應力作用下易裂縫,掉磚,燒穿甚至倒塌,同時,這種熱風爐采用的金屬燃燒器使火焰直接沖擊隔墻,并在燃燒室中引起共振,更加劇了磚襯的破損。改造型的內燃式熱風爐雖在隔墻中下部溫差較大的區域內外環間砌了一層絕熱磚,并用陶瓷燃燒器替代金屬燃燒器,克服了隔墻燒穿問題,減輕了破損,但并沒有取消隔墻,從根本上解決掉磚的問題。
          2. Internal combustion hot blast stove can provide blast furnace temperature above 1000 C by improving refractory materials, but it is composed of combustion chamber and regenerator, separated by partition wall, which produces temperature fluctuation in the process of combustion and air supply, especially in the lower part, under various stresses. It is easy to crack, drop bricks, burn through and even collapse. At the same time, the metal burner used in the hot blast stove makes the flame directly impact the partition wall and cause resonance in the combustion chamber, which further aggravates the damage of the brick lining. Although the reformed internal combustion hot blast stove has built a layer of insulating brick between the inner and outer rings of the large temperature difference between the middle and lower parts of the partition wall and replaced the metal burner with a ceramic burner, the problem of partition wall burning through has been overcome and the damage has been reduced, but the partition wall has not been cancelled, and the problem of brick removal has been fundamentally solved.
          3.外燃式熱風爐的優點是取消了隔墻,將燃燒室與蓄熱室完全分開,蓄熱室的格子磚柱穩定性好。缺點是:①投資大、占地面積大,所需鋼材與耐火磚增加。②在燃燒室與蓄熱室的聯結段、磚型復雜、砌筑困難,并成為結構上的薄弱環節。
          3. The advantage of the external-fired hot blast stove is that the partition wall is cancelled and the combustor and regenerator are completely separated. The lattice brick column of the regenerator has good stability. The shortcomings are as follows: 1) large investment, large area, increased steel and refractory bricks required. (2) In the connection section between combustion chamber and regenerator, the brick type is complex, the masonry is difficult, and it has become a weak link in the structure.
          4.頂燃式熱風爐的優點是:①和外燃式一樣,取消了隔墻,從根本上消除內燃式的致命弱點,并在熱風爐容量相同的情況下,蓄熱面積增加25~30%。②采用短焰燃燒器,直接在頂部燃燒,高溫熱量集中,減少了熱損失,有利于拱頂溫度的提高。③爐型簡單、結構強度好,磚型少,砌筑容易。④改善了耐火材料的工作條件,下部負荷重的地區工作溫度低;上部工作溫度高而負荷小。⑤占地面積小,與外燃式相比,大約可節省20%的鋼材和耐火材料。但要使頂燃式熱風爐順利工作也要解決以下問題;①需要大功率的短焰燃燒器,保證煤氣在拱頂的有限空間內完全燃燒,并保證氣流的均勻分布。②拱頂設置燃燒器的部位,要經受強烈的溫度波動。因此這部分需要用耐高溫而且耐急冷急熱性能好的耐火材料。③由于熱風出口在頂部,熱風管道要伸長至爐頂高度,需設相應的管道支架與膨脹圈。④由于熱風閥,燃燒閥等閥門在頂部,必須在頂部設吊裝設備,以便檢修更換。
          4. The advantages of top-fired hot blast stove are as follows: 1. Like external-fired hot blast stove, the partition wall is eliminated, and the fatal weakness of internal combustion type is eliminated fundamentally. Under the same capacity of hot blast stove, the heat storage area is increased by 25-30%. (2) The use of short flame burner directly burns at the top, and the high temperature heat concentration reduces the heat loss, which is conducive to the increase of the vault temperature. (3) The furnace type is simple, the structure strength is good, the brick type is few, and the masonry is easy. (4) The working conditions of refractories have been improved, and the working temperature in the area with heavy load at the lower part is low, while the working temperature in the upper part is high and the load is small. (5) Small area, about 20% steel and refractories can be saved compared with external combustion. But in order to make top-fired hot blast stove work smoothly, the following problems should be solved: (1) High-power short-flame burner is needed to ensure the complete combustion of gas in the limited space of vault and the uniform distribution of air flow. (2) The position where the burner is set on the vault should undergo strong temperature fluctuation. Therefore, this part needs refractories with high temperature resistance and good quench and heat resistance. (3) Because the hot air outlet is at the top, the hot air pipeline should be extended to the top of the furnace, and the corresponding pipe support and expansion ring should be set up. Because hot air valves, combustion valves and other valves are at the top, hoisting equipment must be installed at the top for maintenance and replacement.
          5.球式熱風爐目前只用于100m3以下的小高爐,它類似頂燃式熱風爐,只是不砌格子磚,而是將高鋁球直接裝入熱風爐內。它要求煤氣含塵低否則清理換球的工作量很大。
          5. Ball-type hot blast stove is currently only used in small blast furnaces below 100m3. It is similar to top-fired hot blast stove, but does not build checked bricks, but directly loads high alumina balls into the hot blast stove. It requires low dust content of gas, otherwise it will take a lot of work to clean and change balls.

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