	US 11,795,617 B2
	Method and apparatus for drying preferably a moving material web by means of at least one drying device heated by means of biogas and comprising infrared radiators
Lucas Menke, Munich (DE); George Troubounis, Munich (DE); Henning Laubrock, Munich (DE); and Philipp Kückmann, Mönchengladbach (DE)
Assigned to Meri Environmental Solutions GmbH, Munich (DE); and Voith Patent GmbH, Heidenheim (DE)
Appl. No. 17/55,556
Filed by Meri Environmental Solutions GmbH, Munich (DE); and Voith Patent GmbH, Heidenheim (DE)
PCT Filed May 8, 2019, PCT No. PCT/EP2019/061853 § 371(c)(1), (2) Date Nov. 13, 2020, PCT Pub. No. WO2019/219484, PCT Pub. Date Nov. 21, 2019.
Claims priority of application No. 10 2018 003 969.3 (DE), filed on May 16, 2018.
Prior Publication US 2021/0198847 A1, Jul. 1, 2021
Int. Cl. D21F 5/00 (2006.01); C02F 3/28 (2023.01); C12M 1/107 (2006.01)

CPC D21F 5/002 (2013.01) [C02F 3/28 (2013.01); C12M 1/107 (2013.01); C02F 2101/40 (2013.01)]

20 Claims

1. Method for producing an object, wherein the method comprises drying the object (24, 12) or a primary product thereof, the object (24, 12) or a primary product thereof being at least partially dried in at least one drying device (18), wherein at least one of the at least one drying units (18) contains at least one infrared radiator (20) which is at least partially heated by means of biogas, wherein a combustion gas selected from the group consisting of oxygen, air or other oxygen-containing gases is added to the biogas before said biogas is supplied to the at least one infrared radiator (20) in order to heat said at least one infrared radiator, and the oxygen content in the waste gas resulting from the at least one infrared radiator (20) being heated by means of the biogas is measured by means of a measuring device (46) and the amount of combustion gas added to the biogas before said biogas is supplied to the at least one infrared radiator (20) is controlled on the basis of the measured oxygen content.