Objective
The aim of the project is to demonstrate the incineration with high energy recovery of strongly varying (in amount and concentration) waste gases from textile printing machines and a sludge dryer.
The main innovative aspects of the project are :
* minimising the waste gas flows and maximizing the VOC (Volatile Organic Compound) - concentration on a value as high as possible (maximum of 50% LEL)
* energy recovery with the use of a regenerative incinerator : surplus energy will be used to heat up thermal oil for heating the dryers of the printing machines and the sludge dryer.L%
The results of the project are evaluated and reported in the Final technical evaluation report (June 1995).
Texoprint BV produces several types of printed fabrics on 5 printing machines. The fabric is printed with a solvent-based paint. The solvent (WS = White Spirit), a volatile organic compound, is removed in the drying section of the printing machine, by heating to 140 deg. C. Heated air is blown on the fabric. Air is sucked out at 1.2 or 3 points. Until 1993 the waste gases of each printing machine were emitted through separate exhaust ducts. The printing machines each operate approximate 2.000 to 2.500 hours per year.
A maximum of 4 machines operate simultaneously. The total yearly emission, based on measurements and mass balance calculations, is approx. 1.000.000 kg per year. The emission from the sludge dryer is estimated to be 600.000 kg WS per year. The VOC concentration is presently approx. 3,5 to 13 g WS/Nm3.
The aim of the project is to reduce the VOC emission of the total plant to the maximum emission level, required in the Nuisance Act, of 115.000 kg/year. The expected emission reduction of the printing machines and the sludge dryer will be at least 98%, which means a total maximum rest emission from these sources of 32.000 kg/year.
Presently the VOC concentration is strongly varying, mainly depending on the production rate (range : 10-60 m/min produced). A high and constant VOC concentration is optimal for the incineration, e.g. to improve the energy surplus. The VOC concentration therefore will be controlled, using fans with variable speed, based on the production rate and on measurements of the total VOC concentration with IR or FID monitors. The VOC concentration will be maximized. The maximum value in the outlet of each machine is 50% LEL. The waste gas flow will be controlled between 10.000 and 15.000 Nm3/h. A minimum of 10.000 Nm3/h is required. The total waste gas flow to be treated will as a result vary strongly, based on the number of machines printing simultaneously and on the production rate. The incinerator is designed to treat a largerange of capacities (m3/h) and concentrations.
The project comprises of the following phases :
1. Detailed engineering (instrumentation and control, waste gas ducts, modification of printing machines, incinerator).
2. Fabrication of equipment (incinerator, fan, heat exchanger thermal oil, sludge dryer)
3. Construction (assembly of equipment, waste gas ducts and stack on site)
4. Installation (mechanical and electrical; connection of gas, electricity, air; start-up and commissioning)
5. Evaluation (measurements).
Programme(s)
Topic(s)
Call for proposal
Data not availableFunding Scheme
DEM - Demonstration contractsCoordinator
7548 AW ENSCHEDE
Netherlands