Back to results
US 11,248,845 B2Granted
Apparatus and method for continuously drying bulk goods, in particular wood chips and/or wood fibers comprising a heat exchanger
AssigneeDouglas Technical Limited
InventorsGünter Hensel, Wolfgang Seifert
Life of this patent
Estimating the term…
Abstract
An apparatus and a method is provided for continuously drying bulk goods, in particular wood fibers and/or wood chips, in a dryer, wherein the drying vapors are led to a dryer circuit, in which the drying vapors are indirectly heated via a heat-exchanger and are conducted to the dryer again.
Claims20
An apparatus for drying bulk goods, the apparatus comprising:
- at least one dryer;
- at least one hot gas generator;
- and
- a first heat exchanger configured to indirectly heat a vapor gas mixture for drying the bulk goods in the at least one dryer, wherein said first heat exchanger is configured to be heated by exhaust gases produced by said at least one hot gas generator;
- at least one branch line, upstream, downstream, and/or within the first heat exchanger, the at least one branch line configured to branch off a partial flow of the vapor gas mixture and guide the partial flow of the vapor gas mixture to the hot gas generator;
- at least one line for the remaining partial flow of the vapor gas mixture, the at least one line configured to guide the remaining partial flow of the vapor gas mixture to the at least one dryer;
- at least one filter configured to clean the exhaust gases produced by said at least one hot gas generator;
- a second heat exchanger configured to indirectly heat gases used as feeding air for said at least one hot gas generator and to be heated by said exhaust gases, said second heat exchanger provided downstream of said at least one filter;
- and
- a third heat exchanger configured to indirectly heat a liquid and to be heated by said exhaust gases, said third heat exchanger provided downstream of the at least one filter.
7 more elements
A method for continuously drying bulk goods in at least one dryer, which is supplied with bulk goods and through which a vapor gas mixture passes in a drying circuit, the method comprising:
- heating the vapor gas mixture via a first heat exchanger, the at least one heat exchanger configured to be heated by exhaust gases produced by at least one hot gas generator;
- the guiding the vapor gas mixture to the first heat exchanger in which the vapor gas mixture is heated;
- branching off at least a partial flow of the vapor gas mixture, upstream, downstream, and/or within the first heat exchanger, the at least the partial flow of the vapor gas mixture to be conducted into the at least one hot gas generator;
- cleaning, by at least one filter, said exhaust gases produced by said at least one hot gas generator;
- and
- downstream of said at least one filter, the exhaust gases produced by said at least one hot gas generator are used by a second heat exchanger to indirectly heat gases used as feeding air for said at least one hot gas generator,
- wherein a liquid is heated indirectly by said exhaust gases by means of a third heat exchanger, said third heat exchanger is provided downstream of the at least one filter.
4 more elements
Dependencies are inferred from the claim text.