초록 ▼

A method and apparatus for cooling hot gas in a reactor which is provided with a mixing chamber for hot gas and a chamber encompassing a bubbling fluidized bed in the lower section of the reactor, a riser in the middle section, a gas outlet in the upper section of the reactor, and heat transfer surf

A method and apparatus for cooling hot gas in a reactor which is provided with a mixing chamber for hot gas and a chamber encompassing a bubbling fluidized bed in the lower section of the reactor, a riser in the middle section, a gas outlet in the upper section of the reactor, and heat transfer surfaces for recovering heat from solid particles. The hot gas is introduced through the mixing chamber into the lower section of the reactor. In the mixing chamber solid particles are supplied to the hot gas for cooling the gas. The gas containing solid particles is conveyed into a separator. From the separator, the gas is conveyed through the riser into particle separators and, when purified, out of the reactor. The solid particles separated in the particle separator are returned to the lower section of the reactor, preferably both directly into the mixing chamber and into the fluidized bed. From the fluidized bed, cooled solid particles are conveyed to the mixing chamber for cooling of hot gas.

대표청구항 ▼

A method of cooling hot gas in a reactor having lower and upper sections, and having an inlet duct, a fluidized bed, and a mixing chamber in the lower section of the reactor, the mixing chamber having wall surfaces and disposed above the inlet duct, a riser from the mixing chamber, a gas outlet in t

A method of cooling hot gas in a reactor having lower and upper sections, and having an inlet duct, a fluidized bed, and a mixing chamber in the lower section of the reactor, the mixing chamber having wall surfaces and disposed above the inlet duct, a riser from the mixing chamber, a gas outlet in the upper section of the reactor, and a particle separator in communication with the upper section of the reactor, said method comprising the steps of: (a) introducing hot gas at a first temperature into the mixing chamber through the inlet duct, the gas flowing upwardly through the mixing chamber where it comes into contact with and entrains cooling particles, and then flows into the riser; (b) separating particles from gas in the separator, returning the separated particles toward the fluidized bed, and discharging the hot gases from the separator; (c) introducing some returning particles from step (b) directly into the mixing chamber and others into the fluidized bed; (d) cooling the particles in, or prior to return to, or both in and prior to return to, the fluidized bed; and (e) introducing some cooled particles from the fluidized bed into the mixing chamber so that the cooled particles flow along the wall surfaces of the mixing chamber so as to contact and mix with the hot gas introduced in step (a) and effect cooling thereof, lowering the temperature of the hot gas so that when it is discharged from the separator in step (b) it is at a second temperature lower than the first temperature.