Power plants – Internal combustion engine with treatment or handling of... – By means producing a chemical reaction of a component of the...
Reexamination Certificate
2000-12-15
2003-10-14
Denion, Thomas (Department: 3748)
Power plants
Internal combustion engine with treatment or handling of...
By means producing a chemical reaction of a component of the...
C060S311000
Reexamination Certificate
active
06631612
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of Invention
The present invention is related to a device for eliminating particulates contained in exhaust gas to eliminate and decompose floating particulates (SPM) contained in exhaust gas generated from motors, such as diesel engines for ships, surface transportation vehicles and overland fixed uses.
2. Background Art
In the past, DPF (Diesel Particulate Filter) using a honeycomb-shaped filter made of ceramics, etc. has been proposed for decomposing floating particulates (SPM, hereinafter called as “Particulates”) contained in exhaust gas generated from diesel engines for ships, surface transportation vehicles and overland fixed use, wherein the particulates are captured by DPF, and DPE which had captured a great amount of the particulate is burned to eliminate the particulates for the regeneration of the filter since the exhaust resistance increases when the accumulation of the captured particulates became heavy.
As the regeneration method, a method to improve exhaust temperature by throttling, and a method to burn the un-burned component of the captured particulates after elevating the exhaust gas temperature by means of heating using a heater, supplemental burning, etc.
However, there is a problem as follows in the decomposing method of the particulates in the past.
(1) Due to the repetition of thermal impact in the regeneration, damage to the honeycomb-shaped ceramics filter may occur.
(2) Due to generation of abnormal burning, the thermal resistance and the thermal shock resistance of the filter material deteriorate, thus causing damage to the filter.
(3) Since utility cost, such as for heating by a heater, for supplemental burning, and for required fuels, may be further required, there is a requirement to reduce the cost for such treatment.
(4) When the burning is not sufficient, pressure loss increases to unable the system to use, consequently requiring exchange of the filter itself.
Considering the problems as described above, it is an object of the present invention to provide a device and a method to eliminate particulates contained in exhaust gas, which requires no heating means, such as a heater, and enable to decompose the particulates in exhaust gas at a low temperature.
SUMMARY OF THE INVENTION
The device for eliminating particulates in exhaust gas according to the present invention, which solves the problem described above, is constituted by a capturing means to capture the particulates and a catalyst attaching means to attach the catalyst solution onto the surface of the particulates captured by the capturing means and is characterized by burning and decomposing the captured particulates.
Constituting the device for eliminating particulates in exhaust gas with a capturing means to capture the particulates and a catalyst attaching means to attach the catalyst solution onto the surface of the captured particulates by the capturing means as described above, it enables to eliminate the particulates at a low temperature by means of burning and decomposing the captured particulates.
Preferably, in the device for eliminating the particulates in exhaust gas expelled from a motor described above, wherein the device is constituted by a capturing means to capture the particulates and a catalyst attaching means to attach the catalyst solution onto the surface of the particulates being captured by the capturing means, and the device burns and decomposes the captured particulates.
Constituting the device for eliminating the particulates contained in exhaust gas to eliminate the particulates in the exhaust gas ejected from a motor as described above, wherein the device is constituted by a capturing means to capture the particulates and a catalyst attaching means to attach the catalyst solution onto the surface of the particulates captured by the capturing means, it enables to eliminate the particulates contained in the exhaust gas ejected from diesel engines, for example, by means of burning and decomposing the captured particulates at a low temperature.
Preferably, the device for eliminating the particulates in exhaust gas describe above can be prepared by equipping a spraying means to spray the catalyst solution to the capturing means, whereto the particulates are captured, onto the catalyst attaching means to attach the catalyst solution onto the surface of the particulates.
Constituting the device for eliminating the particulates in exhaust gas as described above, wherein a spraying means to spray the catalyst solution to the capturing means, whereto the particulates are captured, is equipped onto the catalyst attaching means to attach the catalyst solution onto the surface of the particulates, it enables to cover the surface of the particulates efficiently with the catalyst solution. Further, because of preparing in such constitution, the spraying operation can be firmly achieved even under unfavorable condition, such as vibration.
Preferably, in the device for eliminating the particulates in exhaust gas described above, the catalyst attaching means to attach the catalyst solution onto the surface of the particulates is a soaking means to soak the capturing means having captured the particulates into the catalyst solution.
Constituting the device for eliminating the particulates in exhaust gas as described above, wherein the catalyst attaching means to attach the catalyst solution onto the surface of the particulates is a soaking means to soak the capturing means having captured the particulates into the catalyst solution, it enables to cover the surface of the particulates on the capturing means with the catalyst solution even though the filter has a complex shape.
Preferably, in the device for eliminating the particulates in exhaust gas described above, the catalyst solution is any of a catalyst solution containing at least one of an alkali metal and an alkaline earth metal, seawater, and seawater containing at least one of the alkali metal and the alkaline earth metal.
Constituting the device for eliminating the particulates in exhaust gas as described above, wherein the catalyst solution is any of a catalyst solution containing at least one of alkali metals and alkaline earth metals, seawater, and seawater containing at least one of the alkali metals and the alkaline earth metals, the cost for the catalyst solution becomes less expensive, it enables to reuse the sprayed catalyst solution.
Preferably, in the device for eliminating the particulates in exhaust gas described above, the catalyst is carried onto the capturing means.
Constituting the device for eliminating the particulates in exhaust gas described above, wherein the catalyst is carried onto the capturing means, it enables to synergistically decompose the particulates based on catalytic activity with a catalyst other than alkaline catalysts.
Preferably, in the device for eliminating the particulates in exhaust gas described above, the capturing means to capture the particulates is either a discoid-shaped filter or a cylinder-shaped filter.
Constituting the device for eliminating the particulates in exhaust gas as described above, wherein the capturing means to capture the particulates is either a discoid-shaped filter or a cylinder-shaped filter, the device can be produced easily and in a compact size.
Preferably, in the device for eliminating particulates in exhaust gas described above, the filter is either the internal direction filtration type to flow out the exhaust gas having been introduced into the inside of the filter or the external direction filtration type to feed the exhaust gas having been introduced into the exterior of the filter into the inside of the filter.
Constituting the device for eliminating particulates in exhaust gas as described above, wherein the filter is either an internal direction filtration type to flow out the exhaust gas introduced into the inside of the filter or an external direction filtration type to feed the exhaust gas introduced into the exterior of the filter into the inside of the filter, it enables to capture the particula
Fujioka Yuichi
Hattori Akira
Kobayashi Norihisa
Ohkubo Toshiaki
Setoguchi Toshihiko
Denion Thomas
Mitsubishi Heavy Industries Ltd.
Tran Diem
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