Cel A) To realise and optimise a low temperature heat-recovery system of 1.3 MW using 3% of the wet fumes produced by a wet process cement-work kiln. The recovery system will produce 70 deg. C. warm water for a heating system yet to be built.B) To test in a trial-chimney a few solutions to the corrosion problems created by satured fumes on the chimney walls. This problem would be particularly acute in the case of a recovery system handling 100% of the fumes.Energy saving could reach 75% of the current fuel consumption (400 TOE/year) i.e. a saving of 300 TOE/year.1. The heat network : the demonstrative management period has allowed to show that :. the heating fuel economy realised is of 0,212 TOE per day - degree. Relative to the expected economy (300 TOE per year) of 0,177 per day - degree, the observed economy is then larger than 20 %;. the maintenance and exploitation costs amount to 280,- BF per Gcal recovered are lower that the costs assessed to 350 m- BF per Gcal. In a nutshell, on the basis of the fuel economy and of the functioning costs criteria, the technico economic success of the project is total.But in reading that conclusion, we have to take in consideration :- the fact that the external temperature during the reference period was relatively high. Consequently, we could not check if the temperature level controlled by the network (around 70 deg.C) could allow to realize the heating programme as it had been preciously defined.- the recorded economy is considered to the exclusion of the recovered stops. But, as the expected economy level is concerned, a certain security has been taken at the level of the furnace stop periods.2. By March 1986, decision has been taken not to instal an experimental chimney.We have shown that, theoretically, for an Amazone functioning with the whole gaseous flow of the furnace, it is recommended to keep of the order of 15 % of the smokes for desaturation purposes in the chimney.By processing on an Amazone exchanger 85 % of the smokes flow of the furnace, we recovered a thermic power of the order of 20 MW.The equipment comprises a primary circuit recovering the kiln exhausts and a secondary circuit used as a hot water circulation system. The two circuits are closed and operate independently to avoid the possible contamination of the second one by the water of the first circuit which could be polluted by fumes and dust.A. The main element of the first circuit is a heat-exchanger - trade-name Amazone - for direct contact between the fumes and cold water, consisting of a large number of polyester cables along which water flows in countercurrently to the fumes.The large number of cables (approximately 18,000) offers a large exchange area per unit of volume and a high resistance to corrosion and thermal shocks. The water alkalinity is controlled and the condensates are eliminated by purging.B. Hot water generated by existing support boilers is added to the secondary circuit to complement the system.C. The thermal balance will be established from the measures of flows, temperatures,humidity and the fuel consumed by the support boilers. The dust and the level of dissolved material will also be determined. Program(-y) ENG-ENALT 2C - Programme (EEC) of demonstration projects relating to the exploitation of alternative energy sources and to energy saving and the substitution of hydrocarbons, 1983-1985 Temat(-y) 3.2 - INDUSTRY Zaproszenie do składania wniosków Data not available System finansowania DEM - Demonstration contracts Koordynator CIMENTS D'OBOURG SA Wkład UE Brak danych Adres RUE DES FABRIQUES 2 7034 Obourg Belgia Zobacz na mapie Koszt całkowity Brak danych
