WO2013133816A1 - Canister and housing failsafe (canister housing door does not close unless canister properly and fully inserted) - Google Patents

Canister and housing failsafe (canister housing door does not close unless canister properly and fully inserted) Download PDF

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Publication number
WO2013133816A1
WO2013133816A1 PCT/US2012/027966 US2012027966W WO2013133816A1 WO 2013133816 A1 WO2013133816 A1 WO 2013133816A1 US 2012027966 W US2012027966 W US 2012027966W WO 2013133816 A1 WO2013133816 A1 WO 2013133816A1
Authority
WO
WIPO (PCT)
Prior art keywords
housing
door
canister
system
containment system
Prior art date
Application number
PCT/US2012/027966
Other languages
French (fr)
Inventor
Jeffrey R. Kelso
Jason B. ARRIAGA
Gregory A. Griffin
Jerad PARRISH
Original Assignee
International Engine Intellectual Property Company, Llc
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 International Engine Intellectual Property Company, Llc filed Critical International Engine Intellectual Property Company, Llc
Priority to PCT/US2012/027966 priority Critical patent/WO2013133816A1/en
Publication of WO2013133816A1 publication Critical patent/WO2013133816A1/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066Selective catalytic reduction [SCR]
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N13/00Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
    • F01N13/18Construction facilitating manufacture, assembly, or disassembly
    • F01N13/1805Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body
    • F01N13/1827Sealings specially adapted for exhaust systems
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2450/00Methods or apparatus for fitting, inserting or repairing different elements
    • F01N2450/30Removable or rechangeable blocks or cartridges, e.g. for filters
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00Adding substances to exhaust gases
    • F01N2610/02Adding substances to exhaust gases the substance being ammonia or urea
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00Adding substances to exhaust gases
    • F01N2610/10Adding substances to exhaust gases the substance being heated, e.g. by heating tank or supply line of the added substance
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2610/00Adding substances to exhaust gases
    • F01N2610/14Arrangements for the supply of substances, e.g. conduits
    • F01N2610/1406Storage means for substances, e.g. tanks or reservoirs
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/10Internal combustion engine [ICE] based vehicles
    • Y02T10/20Exhaust after-treatment
    • Y02T10/24Selective Catalytic Reactors for reduction in oxygen rich atmosphere

Abstract

A present system and method for a fail-safe loading / securing system for a housing having at least one canister storing a reductant, such as an ammonia adsorbing / desorbing material for use in an exhaust-after treatment device of an internal combustion engine, is disclosed. The system includes a door and seal for closing the housing after receiving the at least one canister and, a status indicator for indicating proper or improper sealing of the door.

Description

CANISTER AND HOUSING FAILSAFE

(CANISTER HOUSING DOOR DOES NOT CLOSE UNLESS

CANISTER PROPERLY AND FULLY INSERTED)

TECHNICAL FIELD

[0001] The present device and system relates to the storage and delivery of a reductant, such as ammonia, for use in a NOx reduction system. Particularly, the present system relates to a housing for storing and transporting canisters containing an ammonia storage material, wherein the housing includes a fail-safe feature for ensuring the door to the housing is fully closed and the canisters properly loaded therein.

BACKGROUND

[0002] Compression ignition engines provide advantages in fuel economy, but produce both NOx and particulates during normal operation. New and existing regulations continually challenge manufacturers to achieve good fuel economy and reduce the particulates and NOx emissions. Lean-burn engines achieve the fuel economy objective, but the high concentrations of oxygen in the exhaust of these engines yields significantly high concentrations of NOx as well. Accordingly, the use of NOx reducing exhaust treatment schemes is being employed in a growing number of systems.

[0003] One such system is the direct addition of ammonia gas to the exhaust stream in conjunction with an after-treatment device. It is an advantage to deliver ammonia directly in the form of a gas, both for simplicity of the flow control system and for efficient mixing of reducing agent, ammonia, with the exhaust gas. The direct use of ammonia also eliminates potential difficulties related to blocking of the dosing system, which are cause by precipitation or impurities, e.g., in a liquid-based urea solution. In addition, an aqueous urea solution cannot be dosed at a low engine load since the temperature of the exhaust line would be too low for complete conversion of urea to ammonia (and C02).

[0004] Transporting ammonia as a pressurized liquid, however, can be hazardous if the container bursts caused by an accident or if a valve or tube breaks. In the case of using a solid storage medium, the safety issues are much less critical since a small amount of heat is required to release the ammonia and the equilibrium pressure at room temperature can be— if a proper solid material is chosen— well below 1 bar. Ammonia in a granular or powder form can be provided in the form of disks or balls loaded into the cartridge or canister. The canisters are then loaded into a heating jacket, and then into a mantle or other storage structure for securing to a vehicle for use. Appropriate heat is applied to the canisters, which then causes the ammonia- containing storage material to release its ammonia gas into an after-treatment device and the exhaust system of a vehicle, for example. Therefore, regulating and maintaining the heat around the canisters is important for consistent and efficient release of ammonia into the exhaust stream, and more effective reduction of NOx. An efficient system requires that multiple canister system configurations be heated sequentially, with only one canister being actively heated at a time.

[0005] The present device is a heating unit or housing for receiving at least one canister containing a reductant, the housing having a sealable door. The housing further includes a status indicator, which indicates whether the door has been completely and properly closed after the canister or canisters are installed therein. Because the door will not close completely unless the canisters are properly installed, the door also acts as a failsafe for installation of the canisters in the housing. The housing maintains and regulates an appropriate temperature for efficient release of ammonia from the canister or canisters. Therefore, ensuring proper closure of the door is important for both effective ammonia release from the canisters, as well as, for avoiding unwanted leakage of ammonia should any escape from the canister and/or its connections to the exhaust after-treatment system. In addition, proper installation of the canisters is also important for safety considerations, and proper operation of the system.

SUMMARY

[0006] There is disclosed herein a device and method, each of which avoids the disadvantages of prior devices, systems and methods while affording additional structural and operating advantages.

[0007] Generally, the present system and method is a failsafe loading/securing system for a housing having at least one canister storing a reductant material, including an ammonia adsorbing/desorbing material, for use in an exhaust-after treatment device of an internal combustion engine.

[0008] In one embodiment, a containment system for ammonia canisters, is disclosed. The system comprises a housing having sidewalls forming an interior, at least one canister containing a reductant material installed within the interior of the housing, a door for sealing the housing after receiving the at least one canister, wherein the door will not close if the canisters are improperly inserted within the heating chamber of the housing. The reductant material includes an ammonia adsorbing/desorbing material.

[0009] In another embodiment, the system further includes a status indicator for indicating proper or improper sealing of the door. The status indicator may include a visual, sound or digital indicator.

[0010] In yet another embodiment, a modular housing for ammonia canisters having a failsafe closure system, is disclosed. The system comprises a door and seal for closing the housing after receiving the at least one canister and, a status indicator for indicating proper sealing of the door.

[0011] A method for fail-safe closure of a housing containing an ammonia canister, is disclosed. The method comprises the steps of positioning at least one ammonia canister within an interior of the housing, setting a mechanism to activate upon a proper closure of a door to the housing and, determining whether the mechanism has been activated.

[0012] These and other embodiments and their advantages can be more readily understood from a review of the following detailed description and the corresponding appended drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

[0013] FIG. 1 is an exploded view of the modular unit for containing the main canisters and start-up canister of the ASDS system;

[0014] FIG. 2 is a perspective view of the present housing system with alternative embodiments of canisters loaded therein; and,

[0015] FIG. 3 is schematic illustrating an embodiment of a housing status indicator showing whether the door is properly or improperly closed.

DETAILED DESCRIPTION

[0016] Referring to FIGS. 1-3, there is illustrated a modular housing unit for use in a system and method for storage of a reductant, and delivery of the reductant for use in the reduction of NOx in an exhaust stream. Ammonia storage and dosing systems (ASDS), which are part of the exhaust gas NOx reduction (EGNR) system used in vehicles, may be comprised of several components, including a start-up canister, at least one main canister contained within a housing or storage compartment, wherein the canisters contain an ammonia adsorbing/desorbing material, an ammonia control module (AFM), a peripheral interface module (PIM), which control the flow of ammonia from the ammonia adsorbing/desorbing material, and possibly other components depending on vehicle specifications. The specific components of the ASDS and EGNR will not be discussed in further detail with the exception of how it relates to the present unit. As the exhaust system of a vehicle, including that of a diesel engine, is well known, it will not be described in detail.

[0017] As shown in FIGS. 1 and 2, the modular system 10 includes a first modular unit or housing 12 having sidewalls 14 forming an interior 16, and a door 18 for sealing the housing. In one embodiment, the housing 12 can be used for storing the main canister 20 or canisters. In another embodiment, the housing may also be used to store not only the canisters but additional components of the ASDS, including the AFM and the PIM. The housing 12 can have any suitable shape for receiving the canisters, but is typically rectangular or square, and may be constructed from any durable material, such as steel, aluminum or plastics, and can be secured, using known attachment means, to the frame of a vehicle (not shown), for retention on the vehicle during use.

[0018] The housing 12 is a modular unit, constructed with standardized dimensions for use in a variety of applications, yet providing flexibility in the number of canisters that can be installed therein. Ideally, the housing 12 is constructed based on industry standards such that it will fit within any vehicle, while providing the option for installation of any number of canisters 18 within the housing. As shown in FIG. 2, the housing 12 can be adapted for receiving from one up to three or more main canisters 20, depending on application requirements. In another embodiment, the housing 12 can contain any number of canisters, while accommodating other components of the ASDS system, such as the AFM and PIM. In addition, the housing 12 can be positioned in a variety of orientations, depending on the use requirements and positioning of the canisters and other components within the vehicle. These various modular housing configurations make the present system a cost-effective, semi-customizable unit.

[0019] The canisters 20 can have any useable shape, including a cylindrical shape, and may be constructed from any suitable material that is durable for loading and transporting the ammonia-containing storage material (not shown). In addition, the material for constructing the canisters should ideally conduct heat, because the ammonia adsorbing/desorbing material used in the exhaust after-treatment device, requires heat to gradually release the ammonia as a gas based on ammonia dosing demands. Aluminum sheets are a suitable material for use in constructing the canisters in a known manner. Aluminum has a low mass density and excellent thermal conductivity.

[0020] Suitable ammonia adsorbing/desorbing material useful in the treatment of NOx in an exhaust stream includes metal-ammine salts, which offer a solid storage medium for ammonia, and represent a safe, practical and compact option for storage and transportation of ammonia. Ammonia may be released or desorbed from the metal ammine salt by heating the salt to temperatures in the range from 10°C to the melting point to the metal ammine salt complex, for example, to a temperature from 30° to 700°C, and preferably to a temperature of from 100° to 500°C. It has been found that the ammine salt is best having the general formula M(NH3)nXz, where M is one or more metal ions selected from the group consisting of Li, Mg, Ca, Sr, V, Cr, Mn, Fe, Co, Ni, Cu, and Zn, n is the coordination number in the range of from 2 to 12, and X is one or more anions, depending on the valence of M, selected from the group consisting of F, CI, Br, I, S04, M0O4, and P04. A saturated strontium chloride has been found to be preferable for the canister storage space. While embodiments using ammonia as the preferred reductant are disclosed, the invention is not limited to such embodiments, and other reductants may be utilized instead of, or in addition to, ammonia for carrying out the inventions disclosed and claimed herein. Examples of such other, or additional reductants include, but are not limited to, urea, ammonium carbamate, and hydrogen.

[0021] In order to accomplish sufficient heating of the canisters 20, the canisters are placed within a heating jacket 22, shown in FIG. 1. The heating jacket 22 initiates and maintains an activation temperature for sufficient release of ammonia gas from the ammonia adsorbing/desorbing material stored in the canister 20. The heating jacket 22 is typically constructed of two, symmetrical halves or sections 24, 26, each section having a generally semicircular shape. The sections are detachably or pivotally connected together to define an interior space or chamber 28 for receiving the canister 20. The heating jackets 22 may be designed to hold one or multiple canisters, and may further include a handle 30 as a tool-less opening and closing mechanism for the sections of the jacket. Additionally, when the handle is in a downward position, it can be useful in securing the canisters within the interior of the jacket.

[0022] Once the heating jackets and canisters are loaded into the housing 12, the housing is sealed with a door 18. The door 18 is attached by known attachment means to at least one sidewall of the housing. It should be understood, that while one embodiment of a hinged door is shown, the housing may include any number of doors attached in a different manner. For example, two doors may be included, one on each side of the housing, that open side-by- side, like a french door. Optionally, the door 18 may be attached to an upper sidewall, and open similar to a garage door, or on a lower sidewall and open from top to bottom or bottom to top. Regardless, it is important that the door 18 seal the housing 12 to prevent leakage of any ammonia into the surrounding area, and also assist in maintaining the required temperatures within the housing for desorbing ammonia from the material within the canisters.

[0023] Referring to FIG. 3, another aspect of the present fail-safe containment system is illustrated. Specifically, indicators are provided to signal correct closure of the door 18 to the housing after installation of the canister. Additionally, and perhaps more importantly, the indicators may be used to signal that the door 18 is incorrectly or improperly closed to the housing, requiring correction.

[0024] For example, an embodiment of the system includes a closure indicator 40 which signals when a proper seal, or alternatively, an improper seal, is achieved between the door 18 and housing 12. After the at least one canister 20 containing a supply of ammonia adsorbing/desorbing material is loaded into the housing, the door is closed. The closure status indicator 40 is used to provide a seal status of the door to the housing. The indicator may be positioned anywhere on the door, and it should be understood that there may be more than one indicator. Additionally indicators (not shown) may be used to show that the canisters are correctly loaded into the housing, and the proper connections have been made between the canister and the ammonia feed lines leading to the exhaust after treatment device (not shown).

[0025] In an embodiment of the present containment system, the status indicator 40 may provide a visual signal 42, an audible signal 44, or both when proper closure is made. For example, the indicator may be an LED or a series of LEDs. Alternatively, the visual signal 62 may be provided by a digital display 44. The audible signal 44 may be provided by an electronic annunciator using any variety or combination of sounds, including a click, beep, buzzer, etc. The status indicator 40 can be used to indicate either proper or improper sealing of the door 18 to the housing 12.

[0026] Where an activation of the status indicator 40 is not made— i.e., the door is not properly closed - then the user may simply open and reclose the door. Alternatively, it may be necessary to reload the canister or canisters within the housing to make certain the canisters are loaded properly so that the door closes completely. Either way, the indicator 40 serves to ensure attention is paid to close the door properly.

Claims

CLAIMS What is claimed is:
1. A containment system for canisters, the system comprising:
a housing having sidewalls forming an interior; at least one canister containing a reductant material installed within the interior of the housing; a door for sealing the housing after receiving the at least one canister; wherein the door will not close if the canisters are improperly inserted within the heating chamber of the housing.
2. The containment system of claim 1, wherein the door further includes a seal completely around an inside periphery of the door.
3. The containment system of claim 1, wherein the door engages the seal when the door is in a closed position creating a leak-proof containment area.
4. The containment system of claim 1, wherein the door is moveably attached to a sidewall of the housing.
5. The containment system of claim 4, wherein the door is pivotally attached to the sidewall of the housing.
6. The containment system of claim 1, wherein the door includes a locking mechanism for sealing the door with the housing.
7. The containment system of claim 6, wherein the locking mechanism is a pivotal lock.
8. The containment system of claim 1, wherein the system further includes a status indicator for indicating sealing of the door.
9. The containment system of claim 8, wherein the status indicator comprises a visual indicator.
10. The containment system of claim 8, wherein the status indicator comprises a sound indicator.
11. The containment system of claim 8, wherein the status indicator comprises a digital display.
12. The containment system of claim 8, wherein the status indicator signals when the door is properly closed on the housing.
13. The containment system of claim 8, wherein the status indicator signals when the door is improperly closed on the housing.
14. The containment system of claim 1, wherein the reductant material is an ammonia adsorbing/desorbing material.
15. A modular housing for ammonia canisters having a fail-safe closure system, the system comprising: a door and seal for closing the housing after receiving the at least one canister; and, a status indicator for indicating a sealing status of the door.
16. The fail-safe system of claim 15, wherein the system further includes a status indication for signaling when the canister is properly loaded within the housing.
17. The fail-safe system of claim 15, wherein the status indicator signals when the door properly closed on the housing.
18. The fail-safe system of claim 15, wherein the status indicator signal when the door improperly closed on the housing.
19. A method for fail-safe closure of a housing containing an ammonia canister, the method comprising the steps of: positioning at least one ammonia canister within an interior of the housing; setting a mechanism to activate upon a proper closure of a door to the housing; and, determining whether the mechanism has been activated.
20. The method of Claim 19, wherein the mechanism is an annunciator.
21. The method of Claim 20, wherein the annunciator emits a visual signal.
22. The method of Claim 20, wherein the annunciator emits an audible signal. The method of Claim 19, wherein the mechanism is electronic.
PCT/US2012/027966 2012-03-07 2012-03-07 Canister and housing failsafe (canister housing door does not close unless canister properly and fully inserted) WO2013133816A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/US2012/027966 WO2013133816A1 (en) 2012-03-07 2012-03-07 Canister and housing failsafe (canister housing door does not close unless canister properly and fully inserted)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2012/027966 WO2013133816A1 (en) 2012-03-07 2012-03-07 Canister and housing failsafe (canister housing door does not close unless canister properly and fully inserted)

Publications (1)

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WO2013133816A1 true WO2013133816A1 (en) 2013-09-12

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5010322A (en) * 1987-08-12 1991-04-23 Gas Research Institute Housing for a process controller
US5120096A (en) * 1990-08-23 1992-06-09 Baxter International Inc. Misloaded IV tube detector for an IV pump
US20040031263A1 (en) * 2002-02-25 2004-02-19 Klaus Binder Device for exhaust-gas purification, and an operating and monitoring for said device
US20060170542A1 (en) * 2005-01-24 2006-08-03 Wolfgang Schoor Safety shut-off system
US20070166575A1 (en) * 2005-12-29 2007-07-19 Mcleod D D Fluid fuel cartridge with an integrated content module

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5010322A (en) * 1987-08-12 1991-04-23 Gas Research Institute Housing for a process controller
US5120096A (en) * 1990-08-23 1992-06-09 Baxter International Inc. Misloaded IV tube detector for an IV pump
US20040031263A1 (en) * 2002-02-25 2004-02-19 Klaus Binder Device for exhaust-gas purification, and an operating and monitoring for said device
US20060170542A1 (en) * 2005-01-24 2006-08-03 Wolfgang Schoor Safety shut-off system
US20070166575A1 (en) * 2005-12-29 2007-07-19 Mcleod D D Fluid fuel cartridge with an integrated content module

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