CA2520914A1 - Kiln with process water evaporation system - Google Patents

Kiln with process water evaporation system Download PDF

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Publication number
CA2520914A1
CA2520914A1 CA002520914A CA2520914A CA2520914A1 CA 2520914 A1 CA2520914 A1 CA 2520914A1 CA 002520914 A CA002520914 A CA 002520914A CA 2520914 A CA2520914 A CA 2520914A CA 2520914 A1 CA2520914 A1 CA 2520914A1
Authority
CA
Canada
Prior art keywords
liquid
evaporation
chamber
kiln
interior space
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002520914A
Other languages
French (fr)
Other versions
CA2520914C (en
Inventor
C. Wayne Roberts
Harold Wayne Hankins
Karl H. Grubb
Joel S. Bridges
David E. Miles
Michael L. Miles
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Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2520914A1 publication Critical patent/CA2520914A1/en
Application granted granted Critical
Publication of CA2520914C publication Critical patent/CA2520914C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B9/00—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards
    • F26B9/06—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in stationary drums or chambers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/02—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/06—Controlling, e.g. regulating, parameters of gas supply
    • F26B21/08—Humidity
    • F26B21/086—Humidity by condensing the moisture in the drying medium, which may be recycled, e.g. using a heat pump cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B2210/00—Drying processes and machines for solid objects characterised by the specific requirements of the drying good
    • F26B2210/16—Wood, e.g. lumber, timber

Abstract

A process and apparatus for drying a stack of lumber, wherein the drying comprises a condensation collection device (50) for collecting liquid in the chamber interior space (12); and an evaporation system (70) for evaporating collected liquid from the chamber interior space. Process water or effluent discharge from the drying process is reduced or eliminated.

Claims (25)

1. A dry kiln system for drying a stack of lumber, comprising:
at least one kiln chamber defining a chamber interior space capable of receiving a stack of lumber for drying;
a chamber heating source capable of providing heated air;
an air moving device capable of circulating heated air supplied to the chamber interior space;
a condensation collection device for collecting liquid in the chamber interior space; and an evaporation system for evaporating collected liquid from the chamber interior space.
2. The dry kiln system of claim 1, wherein:
the condensation collection device is an evaporator coil in the chamber interior space.
3. The kiln system of claim 1, further comprising:
a drain system to receive liquid from the condensation device:
4. The dry kiln system of claim 3, wherein the condensation collection device directs liquid to a liquid drainage system.
5. The dry kiln system of claim 1, wherein:

the condensation device comprises a liquid contact surface.
6. The dry kiln system of claim 5, wherein:
the dry kiln system further comprises a liquid drainage system, and said the liquid contact surface directs liquid toward the evaporation system.
7. The dry kiln system of claim 5, wherein the liquid contact surface slopes to a liquid drain system, utilizing gravity to direct liquid toward a liquid drainage system.
8. The dry kiln system of claim 5, wherein the liquid contact surface is a sloping floor of the chamber interior space.
9. The dry kiln system of claim 1, wherein:
the heating source is further capable of providing heat to the evaporation system to effect evaporation of liquid collected by the condensation collection device.
10. The dry kiln system of claim 1, wherein:
the evaporation system comprises a liquid holding tank and an evaporation device heating source, wherein the heating source effects evaporation of the liquid in the holding tank.
11. The dry kiln system of claim 1, wherein:

the evaporation device comprises a liquid holding tank, and heat from the chamber heating source is directed to the liquid holding tally to effect evaporation of the liquid in the holding tank.
12. The dry kiln system of claim 1, wherein the evaporation device comprises a pump to direct collected liquid into the kiln chamber for heating to effect evaporation.
13. The dry kiln system of claim 12, wherein the pump directs liquid to a floor surface of the chamber interior space for heating to effect evaporation.
14. The dry kiln system of claim 1, further comprising a plurality of kiln chambers defining a chamber interior space capable of receiving a stack of lumber for drying.
15. The dry kiln system of claim 14, wherein the system further comprises a liquid drain system capable of receiving liquid from each kiln chamber and capable of delivering said liquid to the evaporation system.
16. The dry kiln system of claim 14, wherein collected liquid from said plurality of kiln chambers is directed to a common pump chamber for delivery to an evaporation system.
17. The dry kiln system of claim 16, wherein the evaporation system comprises a liquid holding taut with a heat source to effect evaporation.
18 18. The dry kiln system of claim 17, wherein the evaporation system comprises a surface of a kiln chamber interior space of at least one kiln in the kiln system.
19. The dry kiln of claim 15 wherein the evaporation system directs the liquid to a kiln chamber and a holding tank.
20. A process for drying lumber, comprising:
providing a kiln system that comprises a chamber interior space for receiving a quantity of stacked lumber;
a chamber heating source for heating the air within the structure for drying the lumber; and a condensation collection device for collecting liquid in the chamber interior space;
placing a quantity of stacked wet lumber within the chamber interior surface;
circulating heated air within the chamber interior surface and about the stacked lumber to dry the lumber and cause liquid in the wet lumber to escape as vapor;
collecting liquid from condensed vapor in the chamber interior surface; and evaporating said liquid to prevent effluent liquid in the process for drying lumber.
21. The process of claim 20, wherein collecting and evaporating steps are effected by:
providing a pump chamber and an evaporation unit;

pumping the collected liquid to the evaporating unit to effect evaporation.
22. The process of claim 20, wherein the evaporation unit is a liquid storage tank downstream from the pump chamber.
23. The process of claim 20, wherein the evaporation unit is a surface of a chamber interior space.
24. The process of claim 21, wherein the pump chamber directs liquid collected from more than one chamber interior space.
25. The process of claim 24, wherein the pump chamber directs collected liquid to more than one evaporation unit
CA2520914A 2003-02-04 2004-02-04 Kiln with process water evaporation system Expired - Fee Related CA2520914C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US44484103P 2003-02-04 2003-02-04
US60/444,841 2003-02-04
PCT/US2004/003300 WO2004070270A2 (en) 2003-02-04 2004-02-04 Kiln with process water evaporation system

Publications (2)

Publication Number Publication Date
CA2520914A1 true CA2520914A1 (en) 2004-08-19
CA2520914C CA2520914C (en) 2010-04-27

Family

ID=32850940

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2520914A Expired - Fee Related CA2520914C (en) 2003-02-04 2004-02-04 Kiln with process water evaporation system

Country Status (3)

Country Link
US (1) US7043853B2 (en)
CA (1) CA2520914C (en)
WO (1) WO2004070270A2 (en)

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US7389835B2 (en) * 2003-10-08 2008-06-24 Pride Mobility Products Corporation Active anti-tip system for power wheelchairs
US7987614B2 (en) * 2004-04-12 2011-08-02 Erickson Robert W Restraining device for reducing warp in lumber during drying
WO2006014293A2 (en) * 2004-07-02 2006-02-09 Aqualizer, Llc Moisture condensation control system
AU2005278596A1 (en) * 2004-08-31 2006-03-09 Kakuno Seisakusho Co., Ltd. Pressure reduction type drying machine and method of drying wood using the same
US7963048B2 (en) * 2005-05-23 2011-06-21 Pollard Levi A Dual path kiln
US8771477B2 (en) * 2008-09-17 2014-07-08 Sylvan Source, Inc. Large-scale water purification and desalination
EP2278241A1 (en) * 2009-07-22 2011-01-26 Jevgenijs Gordijs Plant and method for heat treatment of ligneous material
US8201501B2 (en) * 2009-09-04 2012-06-19 Tinsley Douglas M Dual path kiln improvement
CN102597676B (en) * 2010-05-25 2015-07-01 马来西亚森林研究院 High-temperature lumber treatment system
US9927173B1 (en) * 2016-09-26 2018-03-27 Gary L. Kolari Single pass continuous lumber drying kiln
US10082335B2 (en) 2016-09-26 2018-09-25 American Wood Dryers, Llc Single pass continuous lumber drying kiln
US10619921B2 (en) 2018-01-29 2020-04-14 Norev Dpk, Llc Dual path kiln and method of operating a dual path kiln to continuously dry lumber
CN110877391B (en) * 2019-11-27 2020-08-07 湖南威达尔木业科技有限公司 Continuous wood modification heat treatment process and system

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US4467532A (en) * 1983-01-06 1984-08-28 Drake Harry W Apparatus and process for drying lumber
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US4597772A (en) * 1984-09-20 1986-07-01 Wright-Malta Corporation Fixed kiln with rotor steam gasifier
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Also Published As

Publication number Publication date
WO2004070270A3 (en) 2004-11-11
CA2520914C (en) 2010-04-27
WO2004070270A2 (en) 2004-08-19
US20040168339A1 (en) 2004-09-02
US7043853B2 (en) 2006-05-16

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Effective date: 20190204