WO2006060733A2 - Systeme regeneratif d'oxydation thermique - Google Patents

Systeme regeneratif d'oxydation thermique

Info

Publication number
WO2006060733A2
WO2006060733A2 PCT/US2005/043792 US2005043792W WO2006060733A2 WO 2006060733 A2 WO2006060733 A2 WO 2006060733A2 US 2005043792 W US2005043792 W US 2005043792W WO 2006060733 A2 WO2006060733 A2 WO 2006060733A2
Authority
WO
WIPO (PCT)
Prior art keywords
fluid
flow control
chamber
regenerator
flow
Prior art date
Application number
PCT/US2005/043792
Other languages
English (en)
Other versions
WO2006060733A3 (fr
Inventor
Lyman L. Thornton
Original Assignee
Thornton Lyman L
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 Thornton Lyman L filed Critical Thornton Lyman L
Publication of WO2006060733A2 publication Critical patent/WO2006060733A2/fr
Publication of WO2006060733A3 publication Critical patent/WO2006060733A3/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
    • F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
    • F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
    • F23G7/061—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating
    • F23G7/065—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating using gaseous or liquid fuel
    • F23G7/066—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating using gaseous or liquid fuel preheating the waste gas by the heat of the combustion, e.g. recuperation type incinerator
    • F23G7/068—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating using gaseous or liquid fuel preheating the waste gas by the heat of the combustion, e.g. recuperation type incinerator using regenerative heat recovery means

Definitions

  • the present invention relates to the treatment of contaminant laden industrial process emissions and, more particularly, to a ducting and valving system that directs and controls the flow of such emissions to and through a regenerative oxidizer.
  • Thermal and/or catalytic oxidizers increase the temperature of such process emissions to a temperature above the ignition temperature of the contaminants therein so as to oxidize the contaminants.
  • One type of thermal oxidizer is a regenerative thermal oxidizer ("RTO").
  • the basic components of a regenerative thermal oxidizer are a combustion chamber, at least two separate beds (or chambers) of a heat exchange medium having a high heat capacity, and a valving and ducting system sufficient to convey contaminated emissions to and from the combustion chamber, via the heat exchange chambers.
  • hot gases leaving the combustion chamber are directed over a first, relatively cooler one of the beds of heat exchange medium.
  • the temperature difference between the hot gases and the relatively cooler bed results in heat transfer from the gases to the heat exchange medium, thereby heating the medium.
  • relatively cooler contaminated emissions entering the oxidizer are directed over a previously heated second bed of heat exchange media prior to entering the combustion chamber, in order to preheat the emissions to a temperature close to the combustion temperature of the contaminants. Transfer of heat from the second bed to the incoming emissions leads to a gradual cooling of the second bed. Any remaining heat required to bring the emissions to contaminant combustion temperature is provided by a burner located in or near the combustion chamber.
  • a regenerative thermal oxidizer system for use in processing a contaminated fluid.
  • the system includes a combustion chamber, a system fluid feed duct, and at least a first and a second regenerator chambers in fluid communication with the combustion chamber.
  • a regenerator half-chamber is provided in fluid and thermal communication with the combustion chamber.
  • a first flow control element is provided for controlling a flow of fluid from the system fluid feed duct to the first regenerator chamber, and a second flow control element is provided for controlling a flow of fluid from the system fluid feed duct to the second regenerator chamber.
  • An intermittent supply duct connects the system fluid feed duct to the regenerator half-chamber.
  • a third flow control element controls flow of system feed fluid through the intermittent supply duct.
  • Feed fluid is directed either to one of the first and second regenerator chambers or to the half-chamber prior to flowing into the combustion chamber so that the fluid is are pre-heated prior to entering the combustion chamber, even during reversal of fluid flow direction within the oxidizer.
  • the system may also include a fourth flow control element for controlling a flow of fluid from the first regenerator chamber to a system exhaust, and a fifth flow control element for controlling a flow of fluid from the second regenerator chamber to the system exhaust.
  • a control system is provided for opening and closing the flow control elements, selectively, in a prearranged sequence whereby one of the fourth flow control element or fifth flow control element and either the third flow control element or one of the first and second flow control elements is open at all times to maintain the pressure of fluid flow through the regenerative thermal oxidizer relatively constant.
  • FIGS. 1-12 are similar schematic representations of a two-chamber regenerative thermal or catalytic oxidizer showing the sequence of flow control element operation in the present invention.
  • FIGS. 1-12 show a schematic representation of one embodiment of a regenerative thermal oxidizer system in accordance with the present invention, although the present invention is applicable to oxidizer systems having other known configurations.
  • a two chamber regenerative oxidizer 20 comprises a common combustion chamber 22 overlying a pair of conventional segregated regenerative chambers 24 and 26.
  • the combustion chamber 22 is provided with one or more conventional burners 30a and 30b.
  • a first burner 30a is provided in combustion chamber 22 proximate regenerative chamber 24 and a second burner 30b is provided in combustion chamber 22 proximate regenerative chamber 26.
  • burners 30a and 30b positioned proximate chambers 24 and 26
  • the burners are not necessarily positioned proximate chambers 24 and 26, and may be positioned at any of a variety of alternative locations within the combustion chamber.
  • the regenerative chambers 24 and 26 are provided with heat exchange media (for example, known ceramic matrix heat exchange media such as ceramic saddles) 32 and 34, respectively.
  • a regenerative half-chamber 21 is positioned so as to be in fluid and thermal communication with combustion chamber 22.
  • Chamber 21 is termed a "half-chamber" because it is smaller that more conventional regenerative chambers 24 and 26 and because gas flow to the chamber is controlled by a single flow control element 62.
  • Half-chamber 21 is also provided with a heat exchange medium similar to those provided in regenerative chambers 24 and 26. In the embodiment shown, half-chamber 21 is positioned along an upper portion of the oxidizer system between conventional chambers 24 and 26 and in close proximity to combustion chamber 22.
  • half-chamber 21 may be located in any position where it can receive contaminated emissions via an intermittent supply duct (as described below) prior to entering either of conventional chambers 24 or 26, and in any position where the heat exchange medium contained in chamber 21 will be exposed to radiant and/or convective heat emanating from combustion chamber 22.
  • the heat exchange medium in half-chamber 21 is constantly regenerated with heat received from hot gases which traverse the combustion chamber between chambers 24 and 26. This enables pre-heating of contaminated emissions flowing vertically through half-chamber 21.
  • the emissions are pre-heated to a temperature near the oxidation temperature of the contaminants prior to entering combustion chamber 22.
  • a contaminated emission duct or system fluid feed source 39 feeds a system fluid to regenerative chambers 24 and 26 of oxidizer 20 through a pair of inlet ducts 36 and 38, respectively.
  • Outlet ducts 40 and 42 lead from chambers 24 and 26, respectively to the low pressure side of an exhaust blower 43.
  • the various ducts of the oxidizer system are operatively coupled to flow control elements for regulating the flow of fluid along the ducts between the various regenerative chambers and blowers comprising the oxidizer system.
  • the flow control elements are in the form of individual valves positioned along respective ones of the ducts for controlling flow therethrough.
  • inlet ducts 36 and 38 are provided with valves 44 and 46, respectively, and outlet ducts 40 and 42 are provided with, valves 48 and 50, respectively, for control of flow to the exhaust blower 43.
  • An intermittent supply duct 60 extends from contaminated emission feed duct 39 to half chamber 21. As emissions pass through half-chamber 21, the emissions are pre-heated to a temperature near the oxidation temperature of the contaminants, prior to entering combustion chamber 22. The emissions then pass out of half chamber 21 to combustion chamber 22 of oxidizer 20.
  • the embodiment of the oxidizer 20 shown in FIGS. l-12_ is provided with a purge circuit comprising a duct 70 leading from the clean air output of the exhaust blower 43. Flow through the duct 70 is short circuited back to the blower 43 upon opening of a balancing valve 72 that communicates with the outlet 40 to the exhaust blower 43.
  • the clean air duct 70 feeds the regenerative chamber 26 through a valve 74 and line 76 and feeds the regenerative chamber 24 through a valve 78 and duct 80.
  • a purge blower 90 forces purge air through a purge air input duct 92, which directs purge air to chambers 24 and 26 based on the state (open or closed) of valves 74 and 78.
  • the embodiment of the oxidizer described herein includes a purge circuit, an oxidizer incorporating a half-chamber as described herein may also be used without a purge circuit.
  • Purge system valves 72, 74, 78, and valves 44, 48, 46, 50, and 62 used to direct the emissions to the combustion chamber and the hot gases from the combustion chamber may be power-actuated, computer or electronically-controlled flow control valves typically used for such purposes. Examples of such valves and the types of electronic control systems usable for actuating the valves are disclosed in U.S. Pat. Nos. 5000422, 5327928, 4347869, 6609904, and in published U.S. Application No. 20040230402, all of which are incorporated herein by reference.
  • two or more of the necessary flow control elements may be integrated into a single unit or structure (for example, an indexable rotary valve) which controls flow of fluid to the various elements of the oxidizer system.
  • a single unit or structure for example, an indexable rotary valve
  • One or more such integrated flow control structures may be incorporated into the oxidizer system.
  • inlet valve 44 begins to close and intermittent supply valve 62 beings to open.
  • emission inlet flow is through both intermittent supply duct 60 and regenerator inlet duct 36.
  • the emissions are pre- heated to a temperature near the oxidation temperature of the contaminants.
  • the emissions then pass out of half chamber 21 to combustion chamber 22.
  • Outlet flow continues through open valve 50 from regenerator 26.
  • a level of heat is constantly maintained in the heat exchange media of half chamber 21 due to convective and radiative heat transfer thereto from combustion chamber 22.
  • Purge valve 78 begins to open to regenerative chamber 24 and purge balancing valve 72 begins to close.
  • regenerative bed 24 is in an idle condition with both the inlet valve 44 and the outlet valve 48 closed.
  • Intermittent supply circuit valve 62 is fully open resulting in 100% of inlet emissions flow through the intermittent supply duct 60 and through half chamber 21, where the emissions are pre-heated.
  • Outlet flow remains through open outlet valve 50 from regenerator 26.
  • Purge valve 78 to regenerative chamber 24 remains open thereby purging chamber 24.
  • Purge balancing valve 72 is closed.
  • inlet valve 44 to the regenerator 24 remains closed and outlet valve 48 begins to open. Simultaneously, outlet valve 50 from regenerator 26 begins to close. Inlet emission flow remains through open valve 62 and intermittent supply circuit 60. Outlet flow is through partially open valves 48 and 50 from regenerators 24 and 26, respectively.
  • Heat exchange media 34 in regenerative chamber 26 is being "regenerated” with heat absorbed from emissions exiting chamber 26 through open valve 50.
  • Purge valve 78 to regenerative chamber 24 begins to close and balancing valve 72 begins to open.
  • regenerator 26 is in an idle position with both inlet valve 46 and outlet valve 50 closed. Emissions inlet flow is solely through valve 62 and intermittent supply circuit 60. Thus, emissions are preheated only by half-chamber 21.
  • Outlet flow is solely through fully open valve 48 from regenerator 24. Purge air is circulating through open balancing valve 72.
  • outlet valve 50 from regenerator 26 remains closed, while inlet valve 46 begins to open and intermittent supply circuit valve 62 begins to close. Emission inlet flow is through both the intermittent supply circuit 60 to regenerator 24 and through valve 46 to regenerator 26. Thus, emissions are preheated by both regenerator 26 and by half-chamber 21. Outlet flow from regenerator 24 is through open valve 48. Purge air circulates through the open balancing valve 72.
  • intermittent supply circuit valve 62 and the intermittent supply circuit 60 are closed. Emission inlet flow is through open valve 46 to regenerator 26. Outlet flow is through valve 48 from regenerator 24. Purge air is circulating through open valve 72.
  • the inlet valve 46 to regenerator 26 begins to close and intermittent supply circuit valve 62 begins to open. Outlet flow is through valve 48 from regenerator 24. Emission inlet flow is shared between the intermittent supply circuit 60 and valve 46 to regenerator 26. Balancing valve 72 begins to close off recirculation of purge air and purge air valve 74 begins to open to admit air to regenerative chamber 26.
  • regenerator 26 is in an idle position with both the inlet valve 46 and the outlet valve 50 closed. Inlet emission flow is solely through the intermittent supply circuit valve 62 and intermittent supply circuit 60. Outlet flow is through valve 48 from regenerator 24. Purge valve 74 to regenerator chamber 26 is open and said chamber is being purged.
  • regenerator 26 As seen in FIG. 10, the inlet valve 46 to regenerator 26 is closed and outlet valve 50 therefrom begins to open. Regenerator 24 outlet valve 48 begins to close. Emission inlet flow is solely through valve 62 and the intermittent supply circuit 60. Outlet flow is shared between valves 48 and 50 from regenerators 24 and 26, respectively. Purge valve 74 to regenerative chamber 26 is closing and balance valve 72 is opening.
  • regenerator 24 is in an idle position with both the inlet valve 44 and the outlet valve 48 closed. Emission inlet flow is solely through valve 62 and the intermittent supply circuit 60. Outlet flow is solely through valve 50 from regenerator 26. Purge air circulates through open balancing valve 72. As seen in FIG. 12, the outlet valve 48 from regenerator 24 is closed and the inlet valve 44 thereto begins to open. The intermittent supply circuit valve 62 in the intermittent supply circuit 60 begins to close conditioning the system 20 for operation as discussed with respect to FIG. 1. Purge air circulates through open balancing valve 72. From the above description, it may be seen that all contaminated emissions entering combustion chamber 22 undergo some degree of preheating, either from one of regenerators 24 and 26, or from half-chamber 21.
  • process efficiency is increased by using convective and radiant heat from combustion chamber 22 to constantly regenerate half chamber 21, and by using chamber 21 to pre-heat contaminated emissions prior to flow of the emissions into combustion chamber 22.
  • the intermittent supply circuit 60 results in an operating circuit and sequence that precludes contaminated emissions from short circuiting the oxidation chamber 22 of the oxidizer 20. Static pressure variations are minimized by the intermittent supply duct and intermittent supply valve in intermittent supply circuit 60. Purging of regenerator chambers 24 and 26 is also accomplished in a manner that minimizes static pressure variations.
  • the present invention is applied to a regenerative thermal oxidizer; however, it is not limited thereto.
  • the system described herein may also be employed in any system where a half-chamber as described can be placed in thermal and fluid communication with a combustion chamber, to preheat any suitable working fluid prior to combustion or oxidation thereof.
  • the embodiment described herein includes a half-chamber 21 operating in conjunction with a pair of regenerative chambers 24, 26.
  • the RTO system may incorporate multiple half-chambers operating in conjunction with two or more regenerator chambers.
  • the RTO system may include more than two regenerator chambers operating in conjunction with a single half-chamber.

Landscapes

  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Incineration Of Waste (AREA)

Abstract

L'invention concerne un système régénératif d'oxydation thermique (20) qui permet de traiter un fluide contaminé. Ce système comprend une chambre de combustion (22), une gaine d'alimentation en fluide contaminé (39) et au moins une première (24) et une seconde (26) chambres de régénération en communication fluidique avec la chambre de combustion (22). Une demi-chambre de régénération (21) est en communication fluidique et thermique avec la chambre de combustion (22). Un premier élément de régulation du débit (44) permet de réguler un débit de fluide allant de la gaine d'alimentation en fluide (39) à la première chambre de régénération (24) et un second élément de régulation du débit (46) permet de réguler un débit de fluide allant de la gaine d'alimentation en fluide (39) à la seconde chambre de régénération (26). Une gaine d'alimentation par intermittence (60) relie la gaine d'alimentation en fluide (39) à la demi-chambre de régénération (21). Un troisième élément de régulation du débit (62) régule le débit du fluide d'alimentation du système à travers la gaine d'alimentation par intermittence (60). Le fluide d'alimentation est dirigé soit sur une des deux chambres de régénération (24) et (26), soit sur la demi-chambre (21) avant de passer dans la chambre de combustion (22) de façon que le fluide soit préchauffé avant d'être introduit dans la chambre de combustion (21).
PCT/US2005/043792 2004-12-03 2005-12-05 Systeme regeneratif d'oxydation thermique WO2006060733A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US63290704P 2004-12-03 2004-12-03
US60/632,907 2004-12-03

Publications (2)

Publication Number Publication Date
WO2006060733A2 true WO2006060733A2 (fr) 2006-06-08
WO2006060733A3 WO2006060733A3 (fr) 2006-11-16

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US (1) US20060121403A1 (fr)
WO (1) WO2006060733A2 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7354879B2 (en) * 2006-01-05 2008-04-08 Saint-Gobain Ceramics & Plastics, Inc. Thermally stable ceramic media for use in high temperature environments
EP2105663B1 (fr) 2008-03-28 2016-01-06 Cesare Baldassari Dispositif d'exécution de processus thermiques, dans lesquels une flamme est utilisée comme source d'énergie thermique
US7806061B2 (en) * 2008-11-14 2010-10-05 Cnh Canada, Ltd. Agricultural implement with dense phase product dispensing and purging
CN102374544B (zh) * 2010-08-12 2015-05-13 昆山巨闳机械科技有限公司 蓄热式焚化炉之残留废气推进装置
WO2018232722A1 (fr) * 2017-06-23 2018-12-27 General Electric Company Système d'oxydation thermique régénératif et procédé de fonctionnement de système d'oxydation thermique régénératif

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5240403A (en) * 1992-09-01 1993-08-31 Moco Thermal Industries, Inc. Regenerative thermal oxidation apparatus and method

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4347869A (en) * 1979-12-14 1982-09-07 American Standard Inc. Hydraulic valve position control system for regulating smokestack exhaust pressure
US5098286A (en) * 1989-11-30 1992-03-24 Smith Engineering Company Regenerative thermal incinerator apparatus
US5000422A (en) * 1990-06-29 1991-03-19 Salem Industries, Inc. Incinerator valve
US5101741A (en) * 1991-05-10 1992-04-07 Jwp Air Technologies Flow line bake-out process for incinerator
US5129332A (en) * 1991-07-10 1992-07-14 Richard Greco Valve actuation mechanism for incinerator
US5327928A (en) * 1993-07-06 1994-07-12 Salem Engelhard Air seal valve
US5707229A (en) * 1993-07-12 1998-01-13 Durr Industries, Inc. Regenerative thermal oxidizer with heat exchanger columns
US6228329B1 (en) * 1994-03-04 2001-05-08 Durr Environmental Two chamber regenerative thermal or catalytic oxidizer with purging circuit
US5538420A (en) * 1994-11-21 1996-07-23 Durr Industries, Inc. Heat exchanger bake out process
US6609904B2 (en) * 2001-01-03 2003-08-26 Wen-Chou Chen Gas furnace control arrangement
US20040230402A1 (en) * 2003-04-29 2004-11-18 Texas Instruments Incorporated Integrated furnace control board and method

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5240403A (en) * 1992-09-01 1993-08-31 Moco Thermal Industries, Inc. Regenerative thermal oxidation apparatus and method

Also Published As

Publication number Publication date
US20060121403A1 (en) 2006-06-08
WO2006060733A3 (fr) 2006-11-16

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