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AssigneeSociete en Commandite Gaz Metropolitain
InventorsRobert Legros, Jamal Chaouki, Xiao Tao Bi, Arturo Macchi, Kebir Ratnani
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A spout-fluid bed drying system and process is comprised of a spout-fluid bed dryer having a conical shaped lower section provided with a packing of heat exchange particles. A cyclone separator is connected to the top of the dryer with separated particles collected by a receiver connected to the leg of the cyclone. A vapor fan compresses the air-vapor mixture before it goes to the heat recuperator and mixing chamber. A tube-shell type heat exchanger, wherein effluent gases from the vapor fan are preheated with heat exchange with the outcoming high temperature gases. A combustion and incineration chamber wherein a natural gas burner is installed at the top and the high temperature flame is used to incinerate the effluent gases introduced from the annulus channel of the chamber to have the odors and VOCs destroyed. A mixing chamber wherein high temperature stream from the incineration chamber is mixed with low temperature stream from the vapor fan to serve as the drying media with the temperature maintained at around 400.degree. C. A slurry discharge nozzle is disposed below the packing and connected to a slurry container via piping and a slurry pump for releasing slurry to the surface of the particles within the packing. Evaporation of water occurs mostly on the surface of particles by contact with hot drying media. A gas-air mixture is fed to the burner through a feed pipe line wherein fresh air is supplied from an air blower.
A drying system for drying organic refuse material having fertilizing properties, said system comprising a spout fluid-bed dryer housing having a conical section provided in at least a part thereof with a packing of heat exchange particles, means to feed a fine spray of an organic refuse material slurry to said packing, inlet means at a narrowed end of said conical section to admit a hot drying gas stream into said housing to heat said packing and to dry said slurry to produce dried slurry particles, said dried slurry particles being convected to a separation means where said dried slurry particles are separated, said effluent gases being fed to a combustion chamber for destroying volatile organic compounds and odor gases from said effluent gases before releasing a regulated amount of the treated gases which is now clean gases and for further heating and drying said gas stream to feed said inlet means of said dryer housing.
A method of treating an organic refuse slurry having fertilizing properties to produce a dried fertilizing particles and for destroying volatile organic compounds and odor gases contained in said organic refuse slurry, said method comprising the steps of:
Dependencies are inferred from the claim text.