The principles of air leakage reduction in regenerative air heater and its retrofit of double tightness from single airtightness have been introduced in the article.The relationship between the air leakage and the operation of the regenerative air heater has been analyzed.Owing to the retrofit from single airtightness to double airtightness,the air leakage rate reduced greatly,the quantity of air blowing & sucking for the boiler increased and the working condition of burning was improved so as greatly to up...
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