Thermal incineration unit

Claim 2

A thermal incinerator unit for use in combination with a curing zone discharging combustible fumes, which comprises in combination, an elongated combustion section with a fume inlet opening at one end and a hot gas outlet from the opposite end thereof, an axial-positioned burner means directed into said inlet opening and adjustable fuel supply means to said burner means, gas passageway means from said hot gas outlet to said fume inlet opening to effect a hot gas recycle to the latter at said burner means, additional gas passageway means from said hot gas outlet to the curing zone, and a gas outlet conduit from said hot gas outlet to effect a cleaned gas discharge to the atmosphere, at least one adjustable fresh air inlet means to said unit, and fan means connective with said unit providing flow of fumes into said combustion section and through said passageway and conduit means to maintain gas and fume flows therethrough.

Claim 3

The thermal incinerator unit of claim 1 further characterized that said gas passageway means for effecting hot gas recycle is provided annularly around said elongated combustion section and in heat exchange relationship therewith.

Claim 4

The thermal incinerator unit of claim 1 further characterized in that a gas bypass passageway extends longitudinally coextensive with said combustion section and is connective between said fan means and said additional gas passageway means from said hot gas outlet, whereby there may be a recirculation of a fume containing stream to the curing zone without passage through said combustion section.

Claim 5

The thermal incinerator unit of claim 3 still further characterized in that said bypass passageway is in heat exchange relationship with said hot gas recycle passageway means.

Claim 6

The thermal incinerator unit of claim 1 further characterized in that a heat exchange section is provided in communication with the hot gas outlet from said combustion section and air inlet means to said heat exchange means provides for preheating air thereto, and an outlet from said heat exchange section is in communication with said additional gas passageway means to the curing zone whereby heated fresh air may be admixed with gas from said hot gas outlet.

Claim 7

The thermal incinerator unit of claim 1 further characterized in that flow control means are provided in combination with the hot gas outlet from said combustion section whereby there may be regulation of the flow gases to said gas passageway means for hot gas recycle and control of gas flow to said additional gas passageway from said hot gas outlet.

Claim 8

The thermal incinerator unit of claim 1 further characterized in that said gas passageway means from said hot gas outlet to said fume inlet opening is of an annular form around said elongated combustion section and a gas bypass passageway is provided in an annular form around said annular form recycle gas passageway, whereby there is a resulting heat exchange relationship between said gas passageways.

Claim 9

The thermal incinerator unit of claim 7 still further characterized in that flow control means are provided in said bypass gas passageway whereby to control fume flow from said fan means to said combustion section and to said gas bypass passageway.

Claim 10

In combination with an oven of the type recirculating at least a portion of the contaminated gas stream, a thermal incineration section, comprising in combination, an elongated open-ended inner shell defining a combustion section with a fume inlet and a hot gas outlet means therefor, an elongated outer shell spaced around said inner shell and providing a recycle passageway for recycle of hot gases, a fume-laden inlet at one end of saId outer shell in alignment with the open gas inlet to said inner combustion sections, a fume passageway from said oven to said fume inlet of said combustion section, a burner with fuel supply means thereto positioned centrally within said fume inlet to the latter, an incinerated gas outlet from said outer shell, additional wall means spaced adjacent said outer shell to provide a gas bypass section therearound which is in heat exchange relationship with said outer shell, a return passageway means from said bypass section to said oven, and a blower means within said fume passageway to maintain gas flow and gas recirculation within said incineration section and said gas bypass section.

Claim 11

In combination with an oven of the type recirculating at least a portion of the contaminated gas stream, a thermal incineration section, comprising in combination, an elongated open-ended inner shell defining a combustion section with a fume inlet and a hot gas outlet means therefor, an elongated outer shell spaced around said inner shell and providing a recycle passageway for recycle of hot gases, a fume-laden inlet at one end of saId outer shell in alignment with the open gas inlet to said inner combustion sections, a fume passageway from said oven to said fume inlet of said combustion section, a burner with fuel supply means thereto positioned centrally within said fume inlet to the latter, an incinerated gas outlet from said outer shell, additional wall means spaced adjacent said outer shell to provide a gas bypass section therearound which is in heat exchange relationship with said outer shell, a return passageway means from said bypass section to said oven, and a blower means within said fume passageway to maintain gas flow and gas recirculation within said incineration section and said gas bypass section.

Claim 12

The combined oven-thermal incineration section of claim 9 further characterized in that adjustable flow control means is provided within each of said gas passageways and said gas bypass sections, whereby the volume of gas flow can be regulated within each portion of said incineration section.