초록 ▼

A process is provided for burning refuse containing polyvinyl chloride without the consequent production of phosgene. The refuse is carbonized in a rotary furnace at temperatures below 1200°F., especially 700°F., in an oxygen deficient atmosphere. A burnable gas containing the carbonized refuse is d

A process is provided for burning refuse containing polyvinyl chloride without the consequent production of phosgene. The refuse is carbonized in a rotary furnace at temperatures below 1200°F., especially 700°F., in an oxygen deficient atmosphere. A burnable gas containing the carbonized refuse is drawn from the furnace by an air jet wherein same is mixed with oxygen and selectively combusted. Uncarbonized refuse is collected and withdrawn after exiting the furnace. An apparatus is provided for combustion of the refuse in the nonphosgene generating process and includes the rotary furnace. Special seals are provided for the furnace to prevent excess oxygen from entering thereinto. In particular, the seals are utilized between the rotary ends of the furnace and stationary head associated with each end respectively. Each seal includes an upper and lower flap of fire resistant material secured to an end of the furnace and a companion flap of like material is secured to an associated end of the stationary head such that the intermediate flap sealably slides between the upper and lower flaps during rotation of the furnace thereby substantially sealing between the furnace and the stationary head.

대표청구항 ▼

An apparatus for burning refuse having polyvinyl chloride therein comprising: (a) a rotary furnace having a rotating middle section and stationary heads at opposite ends of said middle section; (b) first delivery means for transmitting refuse to said furnace; said first delivery means being adapted

An apparatus for burning refuse having polyvinyl chloride therein comprising: (a) a rotary furnace having a rotating middle section and stationary heads at opposite ends of said middle section; (b) first delivery means for transmitting refuse to said furnace; said first delivery means being adapted to restrict flow of oxygen through said delivery means into said furnace; (c) second delivery means for conveying non-combusted refuse from said apparatus; said second delivery means being adapted to prevent flow of oxygen through said second delivery means to said furnace; (d) a sealing mechanism between said furnace middle section and each of said heads respectively; each of said sealing mechanisms comprising a lower, an intermediate and an upper strap; said lower and upper straps being secured in overlapping manner to a first of said middle section or an associated head; said intermediate strap being secured to a second of said middle section or the associated head; said intermediate strap being flexible and slideably positioned between said upper and lower straps and sealably engaged therewith such that when said middle section is rotating with respect to said associated head, oxygen is substantially restricted from passing therebetween; (e) whereby oxygen flow to said furnace can be controlled when the refuse is being combusted therein such that the temperature in said furnace is adapted to be controlled below about 1200 degrees F. so that phosgene is not produced by the burning of the polyvinyl chlorides in the refuse.