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          當前位置:首頁 > 技術知識 > 燃煤熱風爐在改造之后發生了哪些變化

          燃煤熱風爐在改造之后發生了哪些變化

          文章出處:   發布時間:2019-07-30 17:24:43   瀏覽:30

          現在很多用戶都會選擇改造型的燃煤熱風爐,這種設備在使用的過程中出現了更多新的性能特點。如果你對它還不是很了解的話,可以先看一看下面的文章介紹,相信這些內容對大家之后的使用一定會有一些幫助的。具體內容如下:現如今,很多行業用到了改造型的熱風爐,改造型高溫熱風爐是在內燃式熱風爐的基礎上,針對其存在的問題進行改造的熱風爐。改造后,熱風爐拱頂、隔墻、燃燒室和蓄熱室都分別具有穩定的結構,且整體穩定性好,因此受到了各行業的認可。燃煤熱風爐小編帶大家一起準備下關于改造型高溫熱風爐的特點。
          Nowadays, many users will choose the reformed coal-fired hot blast stove, which has more new performance characteristics in the process of using. If you don't know much about it, you can take a look at the following article first. I believe these contents will be helpful for your future use. Specific contents are as follows: Nowadays, many industries have used the reformed hot blast stove. The reformed high temperature hot blast stove is based on the internal combustion hot blast stove, aiming at the existing problems of the reformed hot blast stove. After modification, the vault, partition wall, combustion chamber and regenerator of hot blast stove have stable structures respectively, and the overall stability is good, so they are recognized by all walks of life. Coal-fired hot blast stove small braiding everyone together to prepare for the characteristics of the transformation of high temperature hot blast stove. 一。改造型煉鐵設備高溫熱風爐的拱頂結構
          One. Arch Structure of High Temperature Hot Blast Furnace for Modified Ironmaking Equipment

          改造型高溫熱風爐一般采用圓錐球形。蘑菇形或改進的“大帽子”形拱頂,都與大墻脫開,不坐落在大墻上,拱頂與大墻的接觸部分填有耐火纖維,在熱膨脹時兩者可作滑動摩擦,自由膨脹:拱頂的令部重量支撐在環梁上,通過環梁傳給鋼殼,消除了爐墻膨脹、收縮以及不均勻變形對拱頂砌體的影響,也可使拱頂砌體和爐殼之間不用再留很大的空間,以防由于壓應力大引起接縫開裂。
          Converted high temperature hot blast stove usually adopts conical spherical shape. The mushroom-shaped or improved "big hat" vault is separated from the wall and does not sit on the wall. The contact part between the vault and the wall is filled with refractory fibers. When the vault expands, the two can be sliding friction and free expansion. The weight of the vault's head is supported on the ring beam and transmitted to the steel shell through the ring beam, which eliminates the expansion and receipt of the furnace wall. The influence of shrinkage and non-uniform deformation on the vault masonry can also make the space between the vault masonry and the furnace shell no longer need to be large, in order to prevent the joint cracking caused by the large compressive stress.

          外燃式熱風爐形式a)地得式b)考貝式c)馬琴式d)新日鐵式。
          External combustion hot blast stove form a) Dede type b) Corbel type c) horse Qin type d) Nippon iron type.

          二。改造型高溫熱風爐的防晶間應力腐蝕措施
          Two. Measures to Prevent Intergranular Stress Corrosion in Modified High Temperature Hot Blast Furnace

          (1)熱風爐爐殼采用細晶粒結構鋼材。這種結構可以提高抵抗應力腐蝕破裂的能力。
          (1) The shell of hot blast stove is made of fine grain structural steel. This structure can improve the resistance to stress corrosion cracking.

          (2)在熱風爐拱頂先涂一層防酸性好的涂層,再在整個熱風爐殼體的內表面噴涂輕質耐酸的噴涂料,這樣既可以起絕熱作用,也可以保證腐蝕性冷凝液不與殼體直接接觸,以進-步防止晶間應力腐蝕。
          (2) Apply a good acid-proof coating on the dome of the hot blast stove first, and then spray light acid-proof coating on the inner surface of the shell of the whole hot blast stove. This can not only play an adiabatic role, but also ensure that the corrosive condensate does not contact the shell directly, so as to prevent inter-crystal stress corrosion.

          三。改造型高溫熱風爐的熱室結構
          Three. Hot Chamber Structure of Modified High Temperature Hot Stove

          采用高格子磚和抗蠕變性能的材質,可以改善蓄熱室的熱工性能和格子磚的穩定性。這種磚底部有三個槽孔,相應頂部有三個凸臺孔,安裝時凸臺鎖住凹槽,每塊磚跨越下層磚的三塊磚,互相交錯咬合砌筑成整體型蓄熱室結構,可防止相互錯位。蓄熱室頂部格子磚砌成階梯形,以利用拱頂下的有效空間,并可使氣流分布更均勻。
          The thermal performance of regenerator and the stability of lattice brick can be improved by using high lattice brick and creep resistant material. There are three groove holes at the bottom of the brick and three convex holes at the top. When installed, the convex platform locks the groove. Each brick spans three bricks of the lower brick and interlaces with each other to build a whole regenerator structure to prevent mutual dislocation. The lattice bricks at the top of the regenerator are built into ladders to make use of the effective space under the vault and to make the air distribution more uniform.

          四。改造型高溫熱風爐的燃燒室和陶瓷燃燒器
          Four. Combustor and Ceramic Burner of Modified High Temperature Hot Blast Furnace

          改造型高溫熱風爐的燃燒室采用眼睛形。所有襯磚均設有舌槽,以保證蓄熱室有較好的氣流運動條件和燃燒室有穩定的結構;燃燒室砌體和大墻砌體之間填以包扎的耐火纖維,以防止熱流短路。
          The combustion chamber of the reformed high temperature hot blast stove adopts the eye shape. All lining bricks are equipped with tongue grooves to ensure better air flow conditions in the regenerator and stable structure of the combustion chamber. Fire-resistant fibers are packed between the combustion chamber masonry and the wall masonry to prevent short-circuit of heat flow.

          陶瓷燃燒器可以克服由于火焰直接沖擊隔墻,使該處產生很大的溫度差和壓力差而導致的隔墻開裂,又可以消除金屬燃燒器在燃燒過程中出現脈沖引起共振對磚襯的破壞作用,還可以使空氣和煤氣混合均勻,降低空氣過剩系數,在相同的煤氣條件下,運用陶瓷燃燒器提高燃燒溫度。
          Ceramic burner can overcome the cracking of partition wall caused by the direct impact of flame on partition wall, which results in great temperature and pressure difference. It can also eliminate the damage of brick lining caused by resonance caused by pulse in metal burner during combustion process. It can also make air and gas mix evenly and reduce excess coefficient of air. Under the same gas condition, the ceramic burner is used to increase the combustion temperature.

          五。改造型高溫熱風爐的隔墻改造型高溫熱風爐一般采用絕熱密封隔墻,在隔墻的兩層耐火磚之間增設絕熱磚,如輕質黏土磚;在高溫區采用熱膨脹幾乎等于零的硅磚;在隔墻下部瘩熱室側的絕熱磚旁加設耐熱合金鋼板。
          Five. The partition wall of the reformed high-temperature hot blast stove is usually insulated and sealed, and insulating bricks, such as light clay bricks, are added between the two layers of refractory bricks of the partition wall; silicon bricks with almost zero thermal expansion are used in the high-temperature zone; and heat-resistant alloy steel plates are added beside the insulating bricks at the bottom of the partition wall.

          這些都是改造過的燃煤熱風爐性能方面發生的具體變化,如果你認為還有不清楚的地方可以進行深入的了解。
          These are specific changes in the performance of the retrofitted coal-fired hot blast stove, and if you think there is still something unclear, you can get a deeper understanding.

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