US20060147856A1

US20060147856A1 - Exhaust gas reducing facility

Info

Publication number: US20060147856A1
Application number: US11/026,874
Authority: US
Inventors: Jeng Lai
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-01-03
Filing date: 2005-01-03
Publication date: 2006-07-06

Abstract

An exhaust gas reducing facility includes a combustion chamber, a container and a receptacle disposed below the combustion chamber, a fan device may be used for circulating exhaust gas through the container and the combustion chamber and the receptacle, a heater is attached to the combustion chamber, for burning the exhaust gas flowing into the combustion chamber, and one or more catalyst materials are disposed in the combustion chamber, for acting with the exhaust gas, to reduce poisonous and hazardous materials from the exhaust gas. The receptacle and the container may each include a porcelain element for heat exchanging purposes. The catalyst material may either or both a de-NO_Xand a de-dioxin catalyst material.

Description

BACKGROUND OF THE INVENTION

1. Field of the Invention
The present invention relates to an exhaust gas reducing facility, and more particularly to an exhaust gas reducing facility for removing or for reducing various kinds of exhaust gases.
2. Description of the Prior Art
Our environment has been serious polluted by various kinds of exhaust gases, such as nitrogen oxide productions (NO_X), dioxin, volatile organic compound (VOC), or the like, that are normally generated by various waste burners, incineration plants, industrial furnaces, etc. Various kinds of exhaust gas scrubbers, burners, or other furnaces have been developed to remove or to reduce various kinds of exhaust gases.
For example, some of the typical exhaust gas reducing facilities, such as regenerative thermal oxidizer (RTO), regenerative catalytic oxidizer (RCO), etc., have been developed or provided for treating volatile organic solutions or agents, and comprise a combustion chamber for receiving the exhaust gas, and for heating or burning the exhaust gas, in order to remove or to reduce the volatile organic solutions or agents.
Normally, in the combustion chamber, a great temperature more than 815° C. is required to be provided or transferred into the combustion chamber, in order to suitably burn and remove the volatile organic solutions or agents. However, an expensive burning or combustion chamber is required to be provided to produce or to generate and to transfer the heat of a great temperature more than 815° C.
The other typical exhaust gas reducing facilities have been developed or provided for treating dioxin, and comprise an active carbon material to absorb the dioxin exhaust gas. However, after absorbing the dioxin material, the active carbon material will be buried into ground, and will also pollute our environment, such as pollute the underground water.
U.S. Pat. No. 3,485,015 to Vecchio discloses one of the typical exhaust gas scrubbers, and comprises a number of liquid baths arranged for allowing the exhaust gas to flow through the liquid baths in series, and thus for allowing the exhaust gas to be scrubbed by the liquid baths. However, similarly, the exhaust gas is also transferred to or carried by the liquid, and will also be discharged to our environment.
U.S. Pat. No. 4,699,071 to Vier et al. discloses another typical furnace for reducing nitrogen oxide productions (NO_X), or hot stack or exhaust gas produced by a furnace burning a fossil fuel, and comprises a recycling part of the NO_Xcontaining stack gas, in admixture with cold fresh air, back into a combustion chamber of the furnace. However, a complicated recycling configuration is required to be provided to recycle part of the NO_Xcontaining stack gas.
U.S. Pat. No. 4,739,713 to Vier et al. discloses a further typical combustion system for reducing nitrogen oxide productions (NO_X) or NO_Xcontent of flue gas, and comprises a coal-dust-fired combustion system having at least two vertically adjacent burner planes, in which the burner flame cores are fed with primary air in the core zones in a substoichiometric ratio to the coal dust feed system, and additionally fed with secondary air comprising recycled flue gas. However, a complicated air providing configuration or system is required to be provided to provide and feed fresh air to various portions or zones of the typical combustion system.
U.S. Pat. No. 5,237,939 to Spokoyny et al. discloses a still further typical burner for reducing nitrogen oxide productions (NO_X), and comprises a heat exchanger wherein at least some of the heat transfer elements are coated with a catalyst, and comprises a number of reactive gas injectors arranged to introduce a nitrogeneous compound across a hot end of the heat exchanger. However, it will be difficult and complicated and expensive to coat the heat transfer elements with the catalyst.
Furthermore, the typical exhaust gas scrubbers, burners, or other furnaces each may only be used to treat or to remove or to reduce one kind of the exhaust gases, such as the nitrogen oxide productions (NO_X), dioxin, organic agents, or the like respectively, and may not be easily and readily used to treat or to remove or to reduce the other kind of exhaust gases.
The present invention has arisen to mitigate and/or obviate the afore-described disadvantages of the conventional exhaust gas reducing facilities.

SUMMARY OF THE INVENTION

The primary objective of the present invention is to provide an exhaust gas reducing facility for removing or for reducing various kinds of exhaust gases.
In accordance with one aspect of the invention, there is provided a exhaust gas reducing facility comprising a combustion chamber, a container and a receptacle disposed below the combustion chamber, circulating means for circulating exhaust gas through the container and the combustion chamber and the receptacle, a heater attached to the combustion chamber, for burning the exhaust gas flowing into the combustion chamber, and at least one catalyst material disposed in the combustion chamber, for acting with the exhaust gas, to reduce poisonous and hazardous materials from the exhaust gas.
The circulating means includes a fan device to circulate the exhaust gas through the container and into the combustion chamber and out through the receptacle, or to circulate the exhaust gas through the receptacle and into the combustion chamber and out through the container.
The catalyst material may be disposed above the container or disposed above the receptacle. The receptacle includes a porcelain element disposed therein. The container may also include a porcelain element disposed therein.
The catalyst material may either be a de-NO_Xcatalyst material for removing nitrogen oxide productions (NO_X), or a de-dioxin catalyst material for removing dioxin materials, or may include both a de-NO_Xcatalyst material and a de-dioxin catalyst material for removing both nitrogen oxide productions (NO_X) and dioxin materials.
Further objectives and advantages of the present invention will become apparent from a careful reading of the detailed description provided hereinbelow, with appropriate reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a partial plan schematic view of an exhaust gas reducing facility in accordance with the present invention;
FIG. 2 is a simplified or partial perspective view of the exhaust gas reducing facility; and
FIG. 3 is a simplified or partial perspective view similar to FIG. 2, illustrating the other arrangement or operation of the exhaust gas reducing facility.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring to the drawings, and initially to FIG. 1, a burner or furnace or an exhaust gas reducing facility 10 in accordance with the present invention, may be a selective catalytic reduction (SCR) facility, or the like, and may comprise a combustion chamber 11, and a container 20 and a receptacle 30 disposed below the combustion chamber 11, and a fan device 40 disposed below the receptacle 30 or below the container 20, for circulating poisonous and/or hazardous exhaust gas through the container 20 and the combustion chamber 11 and the receptacle 30 (FIGS. 2, 3). The exhaust gas may normally be generated by various waste burners, incineration plants, industrial furnaces, etc.
For example, the fan device 40 may blow or circulate the poisonous and/or hazardous exhaust gas through the container 20 and then into the combustion chamber 11 and then out through the receptacle 30, as shown in FIG. 2, or, oppositely, may blow or circulate the exhaust gas through the receptacle 30 and then into the combustion chamber 11 and then out through the container 20, as shown in FIG. 3. The exhaust gas reducing facility 10 may further include a heater or a burner 12 attached to the combustion chamber 11, for heating or burning the poisonous and/or hazardous exhaust gas flowing into the combustion chamber 11.
As shown in FIG. 1, the container 20 and the receptacle 30 each may further include one or more porcelain elements 21, 31, disposed therein respectively, and having a spatial or curved structure arranged in a honeycomb shape, to allow the exhaust gas to flow into the container 20 and the receptacle 30 respectively, and to allow the exhaust gas to be heated by the container 20 and the receptacle 30, or to release heat to the container 20 and the receptacle 30, or to heat exchange with the container 20 and the receptacle 30 respectively.
As also shown in FIG. 1, the exhaust gas reducing facility 10 may further include one or more, such as two catalyst materials 50 disposed in the combustion chamber 11, and preferably disposed above or on top of the container 20 and the receptacle 30 respectively. The poisonous and/or hazardous exhaust gas may be heated or burned by the heater or burner 12 of the combustion chamber 11, to a predetermined temperature, such as between 200˜400° C., for acting with the catalyst materials 50, and thus for removing or for reducing nitrogen oxide productions (NO_X), dioxin, or the like.
For example, the catalyst materials 50 may include either de-NO_X catalyst material 50 for removing or for reducing nitrogen oxide productions (NO_X), or de-dioxin catalyst material 50 for removing or for reducing dioxin materials, or may include both the de-NO_Xcatalyst material 50 and the de-dioxin catalyst material 50 for removing or for reducing both the nitrogen oxide productions (NO_X) and the dioxin materials.
It is to be noted that the catalyst materials 50 may be easily changed and disposed into the combustion chamber 11 or into the container 20 and the receptacle 30, without coating the catalyst materials 50 onto heat transfer elements. In addition, either or both of the nitrogen oxide productions (NO_X) and the dioxin materials may be removed or reduced with the same or the single combustion chamber 11, without additional combustion chambers 11.
In operation, as shown in FIGS. 1 and 2, the poisonous and/or hazardous exhaust gas may be blown or circulated by the fan device 40, to flow through the container 20 and then into the combustion chamber 11, for allowing the exhaust gas to be preheated in or by the porcelain element 21 of the container 20, and then for being heated or burned or combusted by the heater or the burner 12 of the combustion chamber 11 to the predetermined temperature ranging between 200˜400° C., and thus for acting with the catalyst materials 50, in order to remove or to reduce either or both of the nitrogen oxide productions (NO_X) and the dioxin materials.
The poisonous and hazardous materials in the exhaust gas may thus be removed or reduced after acted with the catalyst materials 50, and the heated and acted exhaust gas may then be blown or circulated by the fan device 40, to flow through the receptacle 30, and may have heat transferred to or exchanged with the porcelain element 31 of the receptacle 30.
On the contrary, when the temperature of the container 20 or of the porcelain elements 21 of the container 20 is below a set or predetermined temperature, as shown in FIG. 3, the fan device 40 may be switched or changed to different blowing direction, in order to blow or circulate the exhaust gas through the receptacle 30 and then into the combustion chamber 11, for allowing the exhaust gas to be preheated in or by the porcelain element 31 of the receptacle 30, and then for being heated or burned or combusted by the heater or the burner 12 of the combustion chamber 11 to the predetermined temperature ranging between 200˜400° C., and thus for acting with the catalyst materials 50, in order to remove or to reduce either or both of the nitrogen oxide productions (NO_X) and the dioxin materials.
The heated and acted exhaust gas may then be blown or circulated by the fan device 40, to flow through the container 20, and may have heat transferred to or exchanged with the porcelain element 21 of the container 20. The heat recycling effect may reach about 90˜95%, for allowing the heat to be effectively used to generate electric energy, or the like.
Accordingly, the exhaust gas reducing facility in accordance with the present invention may be provided or used for removing or for reducing various kinds of exhaust gases.
Although this invention has been described with a certain degree of particularity, it is to be understood that the present disclosure has been made by way of example only and that numerous changes in the detailed construction and the combination and arrangement of parts may be resorted to without departing from the spirit and scope of the invention as hereinafter claimed.

Claims

1. An exhaust gas reducing facility comprising:

a combustion chamber,

a container and a receptacle disposed below said combustion chamber,

circulating means for circulating exhaust gas through said container and said combustion chamber and said receptacle,

a heater attached to said combustion chamber, for burning the exhaust gas flowing into said combustion chamber, and

at least one catalyst material disposed in said combustion chamber, for acting with the exhaust gas, to reduce poisonous and hazardous materials from the exhaust gas.

2. The exhaust gas reducing facility as claimed in claim 1, wherein said circulating means includes a fan device to circulate the exhaust gas through said container and into said combustion chamber and out through said receptacle.

3. The exhaust gas reducing facility as claimed in claim 1, wherein said circulating means includes a fan device to circulate the exhaust gas through said receptacle and into said combustion chamber and out through said container.

4. The exhaust gas reducing facility as claimed in claim 1, wherein said at least one catalyst material is disposed above said container.

5. The exhaust gas reducing facility as claimed in claim 1, wherein said at least one catalyst material is disposed above said receptacle.

6. The exhaust gas reducing facility as claimed in claim 1, wherein said receptacle includes a porcelain element disposed therein.

7. The exhaust gas reducing facility as claimed in claim 1, wherein said container includes a porcelain element disposed therein.

8. The exhaust gas reducing facility as claimed in claim 1, wherein said at least one catalyst material is a de-NO_Xcatalyst material for removing nitrogen oxide productions (NO_X).

9. The exhaust gas reducing facility as claimed in claim 1, wherein said at least one catalyst material is a de-dioxin catalyst material for removing dioxin materials.

10. The exhaust gas reducing facility as claimed in claim 1, wherein said at least one catalyst material includes a de-NO_Xcatalyst material and a de-dioxin catalyst material for removing both nitrogen oxide productions (NO_X) and dioxin materials.