Study On The Surplus Heat Utilization Of Nonoc 800kt/a Sulphur Burning Sulphuric Acid Plant

It is a well known fact that sulphuric acid production is a highly exothermic process. In that sense, combined with the increased energy cost, surprisingly little heat is recovered from the process. Most often the heat is just cooled off by means of water or in air coolers.The role of modern apparatus of sulphuric acid has changed from a simple part of production to a factory of energy supply,with rise of energy in price and as the awareness of environmental protetion promoting.In order to economicze on importance has been attached to surplus heat recuperation of sulphuric. Recover and utilization of waste heat and measures of energy saving in production acid is important sign of measuring sulphuric acid production level.Recovery and utilization of waste heat may reduce production cost and enhance competitive power of products.In this paper,the central technological route,characters and lenvel of sulplus heat utilization during sulphuric acid prepared are described, especially the technological gap in the field surplus heat utilization between our country and other foreign countrys. To an 800kt/a sulphur burning sulphuric acid plant, the technology of recuperating surplus heat and method are determined. Process and equipment of the largescale sulphuric acid plants based on sulphur by heat balance calculations and material balance calculations.Some problems are discussed such as sulphur-based sulphuric acid production,utilization and development of waste heat recovery system. By calculating the optimal choice the production process and equipment parameters, such as converters,the waste heat boiler,sulphur furnace,blower,acid circulation pump,heat exchanger, absorber and water cooler.By analysing technologic process and calculating system of technologic process.A comparition and contrast has been made between internal apparatus and imported equipments HRS (Heat Recovery System) in quantity of surplus heat recuperation,mature degree in technology,character of simple operation investment etc.then we choose a preferable method of surplus heat utilization on the basis of above comparision and contrast and energy consumption of vapor during sulphuric prepared.