# US 10,119,757 B2 · Drying apparatus and dryer for a textile web comprising an improved device for introducing heat > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,119,757 B2 - Document ID: US10119757B2 - Status: Granted - Kind: B2 - Application number: 15/602,037 - Filed: 2017-05-22 - Published: 2017-11-23 - Granted: 2018-11-06 - Earliest claimed: 2016-05-23 - Assignees: Truetzschler GmbH & Co. KG - Applicants: Truetzschler GmbH & Co. KG - Inventors: Markus Böhn - Web page: https://patentgrep.com/patent/US10119757B2 ## CPC - F26B 3/02: by convection, i.e. heat being conveyed from a heat source to the materials or objects to be dried by a gas or vapour, e.g. air {(F26B3/283 and F26B3/343 take precedence)} - F26B 3/04: the gas or vapour circulating over or surrounding the materials or objects to be dried (F26B3/14 takes precedence) - F26B 3/06: the gas or vapour flowing through the materials or objects to be dried (F26B3/14 takes precedence) - F26B 13/16: perforated {in combination with hot air blowing or suction devices, e.g. sieve drum dryers}(F26B13/18 takes precedence) - F26B 21/33: Humidity - F26B 21/35: Temperature; Pressure - F26B 23/002: {recovered from dryer exhaust gases (F26B23/022 takes precedence)} - F26B 21/003: {Air or gas filters} - Y02P 70/10: Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working - F26B: DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM (drying devices for combines A01D41/133; racks for drying fruit or vegetables A01F25/12; drying foodstuffs A23; drying hair A45D20/00; body-drying implements A47K10/00; drying household articles A47L; drying gases or vapours B01D; chemical or physical processes for dewatering or like separating liquids from solids B01D43/00; centrifugal apparatus B04; drying ceramics C04B33/30; drying yarns or fabrics in association with some other form of treatment D06C; drying frames for laundry without heating or positive air circulation, domestic laundry-or spin-driers, wringing or hot pressing laundry D06F; furnaces, kilns, ovens F27) - Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS ## Abstract A drying apparatus includes a dryer for a textile web. The dryer includes a drying chamber and at least one air-permeable drum arranged to rotate in the drying chamber. The textile web is guidable over a partial section of the circumference of the drum and heated drying air is flowable through the textile web. The dryer further includes a device to introduce heat for heating up the drying air. The device includes an internal hot gas source and an external hot gas source. The internal hot gas source is a component of the dryer and the external hot gas source is arranged peripherally to the dryer and includes a hot gas line connected at least indirectly to the dryer. ## Claims ### Claim 1 A drying apparatus, comprising: a dryer for a textile web, the dryer including a drying chamber and at least one air-permeable drum arranged to rotate in the drying chamber, wherein the textile web is guidable over a partial section of a circumference of the drum and heated drying air from the drying chamber is flowable through the textile web; a device to introduce heat for heating up the drying air, the device comprising an internal hot gas source and an external hot gas source, wherein the internal hot gas source is a component of the dryer and the external hot gas source is arranged peripherally to the dryer and includes a hot gas line connected at least indirectly to the dryer; a first heat exchanger adapted to release heat to the drying air; and a preheat exchanger and a fluid line coupling the preheat exchanger to the first heat exchanger, wherein the hot gas line of the external hot gas source extends into the preheat exchanger and transfers heat to a heating fluid in the fluid line. ### Claim 2 (depends on 1) The drying apparatus according to claim 1, wherein the internal hot gas source includes a gas blower burner arranged in or on the dryer. ### Claim 3 (depends on 1) The drying apparatus according to claim 1, wherein the external hot gas source includes a cogeneration plant which transfers via the hot gas line at least indirectly heat into the drying chamber. ### Claim 4 (depends on 1) The drying apparatus according to claim 1, further including a control unit coupled to the internal hot gas source and to the external hot gas source and configured to control the internal hot gas source and the external hot gas source. ### Claim 5 (depends on 4) The drying apparatus according to claim 4, wherein the control unit is configured to control the internal and external hot gas sources so that the external hot gas source serves as a basic heat supply for the dryer and the internal hot gas source functions to control the temperature of the drying air. ### Claim 6 (depends on 1) The drying apparatus according to claim 1, further including a fresh air heat exchanger coupled to the external hot gas source and to the drying chamber, wherein hot gas from the external hot gas source is flowable through the fresh air heat exchanger, wherein the fresh air heat exchanger is arranged downstream of the preheat exchanger and fresh air entering the drying chamber is heatable by the fresh air heat exchanger prior to entering the drying chamber. ### Claim 7 (depends on 4) The drying apparatus according to claim 4, further including at least one measuring element to measure moisture in the drying air in the drying chamber, wherein the control unit is coupled to the measuring element to read moisture values out of the measuring element and to actuate the internal and external hot gas sources in dependence on the moisture values. ### Claim 8 A dryer for a textile web, comprising: a drying chamber; at least one air-permeable drum arranged to rotate in the drying chamber, wherein the textile web is guidable over at least a partial circumference of the drum and heated drying air is flowable through the textile web; an internal hot gas source to heat up the drying air; a first heat exchanger by which heat is releasable to the drying air; and a preheat exchanger and a fluid line coupling the preheat exchanger to the first heat exchanger, wherein a hot gas line of an external hot gas source extends into the preheat exchanger and transfers heat to a heating fluid in the fluid line. ### Claim 9 (depends on 8) The dryer according to claim 8, further including a control unit arranged to control the internal hot gas source and the external hot gas source. ### Claim 10 (depends on 9) The dryer according to claim 9, wherein the control unit actuates the hot gas sources so that the external hot gas source supplies heat to the dryer and the internal hot gas source functions to regulate a temperature of the drying air.