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Pebble bed hot blast stove technical reconstruction

source:Henan Lite Refractory Material Co.,Ltd  date:2015-01-07  number: Secondary

  Pursuit of 1300≧ blast temperature as the design principles for hot blast stove. The Main problem is the bad mixture effect of the hot blast stove burner, There are diffusive burning process existing in the combustion chamber, The gas sprayed into the combustion chamber by burner is uneven distribution and shunting cause the mix burner with low temperature. Combustion is insufficient. And continue burning in the regenerator, The above reason cause the bad effect of thermal exchange between the airflow and regenerator, so affect the heat energy storage and utilization of thermal mass. This type hot blast stove usually occurs the problems as crown low-temperature and low-temperature blast, thermal mass bonded (pebble bed). The flue-gas with high temperature and high content of CO, Heat energy utilization inefficiency. Thereby achieving high strong burning

  For energy efficiency and achieve the purpose of high blast temperature, pebble bed hot blast furnace technological transformation is a thing to be imperative, keep the furnace shell structure no change, to carry out technical transformation pipeline system basically do not adjust conditions, changes in the internal structure of hot blast stove condition not big in the technical transformation, we offer the solution as below:

  1. Technical transformation of Burning kiln match up the regenerator by changing pebble bed into checker work brick masonry(Partial of the construction change to checker work).

  2. Burner does not change with match up regenerator by changing pebble bed into a heap checker work brick masonry(Partial of the construction change to checker work).

  The common characteristic is the checker work brick must be constructed to the combustion chamber orient, In a word that the suitable construction conformation and quality adopted is very important to improve the whole stability of the hot blast stove, also improve the property of the furnace. In order to realize the full mixture of gas and air rapidly, then produce an average temperature of the gas and air flow into the regenerator. For the heat transfer ability and heat storage function between flue gas and regenerator be effectively improved as well as. After the technical transformed of hot blast stove, changing the regenerator into checker work brick or add the compared sleeve checker work, the temperature of hot blast stove will be improved more 100≧ than before. Save the coke 10000 tons each year, Also overcome the problems as the refractory ball be rebounded and pressed to be mass in the high temperature, etc. All the problems due to the management of changing the ball and high cost running will be completely eliminated. The using lifetime of checker work brick will be extended more than 8 years within the condition of dust content be 5!10mg/sm³. The whole lifetime of the hot blast stove will be sufficiently improved, maybe 15 years according to the scientific management and operation.

       The reconstruction Site of 450m³ hot blast stove

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      1200≧-1300≧ Blast Temperature 1200≧-1300≧

  Flow field distribution is reasonable

  Burner structures stabilityGas-Air mixed well, Fully and efficiently burning.

  Exhaust gas content less NOX

  The checker work technology share, Heat-exchange fully

  Secret of constructing checker work, Efficiently improve heat-storage.

  Flow-gas comprehensive utilizationExhaust-heat less loss

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