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Content archived on 2022-12-27

PROJECT OF A TILE FACTORY HAVING REFRACTORY SINGLE SUPPORT AND "HYDROCASING SYSTEM"

Objective

1.1 Objectives
Construction of a burnt clay roof tile production plant, employing an entirely new technology, and in particular, reducing specific comsumptions considerably.
1.2 Innovative features
- Unit and reversible drying-burning supports
- Wheel type heat exchanger on the smoke
- Large gage furnace, water sealed, able to be heated with fuel oil
- Partially submerged indeformable cars
- Computer for managing the energy and the complete process.
The plant has been running at its normal rate in a stable manner since the middle of 1988.
The volume produced corresponds to specifications. The consumption measurements show an unfavorable difference of 8.5 % from the goals (see paragraphs 1 and 2).
Two types of difficulties have been encoutered :
1) Technical : mastery of the air handling part (uncontrolled pressure drops at the air intakes for the drying). These problems have been solved by regular preventive claning of the heat exchangers.
2) Human : adapting the staff to the new technologies. The remedy applied is an appropriate training program over several years.
PROSPECTS : The summary analysis, contained in the final report, indicates an investment payback period of 3.6 years (as against the 3.72 originally forecast).
This technology has been used several times : Jacob plant in COMMENAILLES - 39140 Bletterans - UH3 hydrocasing unit with variable pitch supports : 40000 tons/year operational since July 1988.
- Project UH4,now being implemented at T.B.L QUINCIEUX
- Project UH5, now being designed at T.B.L QUINCIEUX
Other units have been installed in other companies.
The main interest of the project is that the products are burnt on unit refractory supports whose shape is designed to support the tile without deforming it.
Since the useful weight to static weight ratio is unfavorable with this principle, it was indespensable that a burning technology be designed to optimize calorie losses.
There losses are of three tpes :
1) Loss through the burnt gasses.
2) Loss through the car floors (leaks)
3) Loss through the mass of the products/supports coming out of the furnace. The technology of the project makes it possible to optimize these three cases :
1) Wheel type heat exchanger on the smoke. Use for the drying.
2) Gas-tightness by the water seal system (the cars go through the furnace-tunnel dryer with their floors partially submerged in water).
3) Recovery optimized by the possibility of pressurizing the tunnel, thanks to the perfect leaktightness of the water seal.
Economic aspect :
The energy savings expected are 59 % of the energy which is mormally necessary for operating a plant with traditional technology.
The tests performed on November 29, 1988 and December 1, 1988 show a difference of + 8.5 % in comparison with the planned savings figure. So the actual savings are 55.5 % in comparison with a traditional approach.
The consumption of the plant is 2265 TOE/year for an annual production of 45336 tons of tiles.

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DEM - Demonstration contracts

Coordinator

GRANDE TUILERIE DU RHONE SA (GTR)
EU contribution
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Address
B.P.5 KONINKLIJKE SPHINX
75008 Paris
France

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Total cost

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