60 results about "Fluidized bed combustor" patented technology

In order to quantitatively evaluate actual circulation quantity of bed material extremely simply and to enhance accuracy of comparison of results of thermal balance examined through simulation or the like with actual operation results, time is measured which is required for bed material in a downcomer 5 to reach an upper predetermined height H1 from a lower reference height H0 during stopped feeding of fluidizing air to an external heat exchanger 7; a flow rate of the bed material as circulation quantity is determined from the time and an accumulated amount of the bed material based on an inner diameter D of the downcomer 5.

The present invention discloses a double fluidized beds combustion-gasification material circulating system comprising a fluidized bed gasification furnace and a circulating fluidized bed combustion furnace; the middle portion of the fluidized bed gasification furnace is connected with a material charging chamber of a material returning chamber, and then is connected with the lower portion of the circulating fluidized bed combustion furnace through a material discharging chamber of the material returning device; the upper portion of the circulating fluidized bed is connected to a material charging chamber of a bi-directional material control device through a hyperthermia separator, then is divided into two paths, one path is connected with the lower portion of the fluidized bed gasification furnace through a hyperthermia conical valve on the side surface of the material charging chamber of the bi-directional material control chamber, and the other path is connected with the lower portion of the circulating fluidized bed combustion furnace through the material returning chamber of the bi-directional material control chamber. The circulating fluidized bed combustion furnace and the fluidized bed gasification furnace are combined tightly to implement gasification, combustion, classification and conversion of coal in one set of system, which leads to highly efficiency conversion of coal; the inventive system is also can be used broadly in combustion, gasification, catalysis and regeneration processes.

Systems and methods for generating electricity that combine a pressurized fluidized bed combustor (PFBC) and a molten carbonate fuel cell (MCFC) to provide a 2 A low-cost solution for captured power generation. Introducing a solid fuel into a pressurized fluidized bed combustor to generate steam, first electricity and CO containing 2 smoke. Combining air, natural gas, at least a portion of steam and at least a portion containing CO 2 The flue gas is introduced into the molten carbonate fuel cell to generate a second electricity and mainly contains CO 2 output stream. The pressurized fluidized bed combustor may desirably be air fired and the solid fuel introduced therein may desirably be in finely divided form.

Method of and apparatus for controlling the temperature of a fluidized bed reactor (10), comprising separator means (16) for separating first solid particles from the fluidized bed reactor; a return duct (30) for returning a first portion of the first solid particles to the fluidized bed reactor; a discharge duct (50) for the discharge of a second portion of the first solid particles and an inletduct (52) for transferring second solid particles from a second fluidized bed reactor to said fluidized bed reactor, in which the return duct (30) and the inlet duct (52) share a common end 10 portion (54) for transferring a mixture of solid particles, formed of the first portion of the first solid particles and the second solid particles, to the fluidized bed reactor (10). Said apparatus also preferably comprises a fluidized mixing device (58) for mixing the first portion of the solid particles and the second solid particles with each other.

Systems and methods are provided for determining the size of particles within a fluidized bed reactor. The pressure of gas adjacent a gas inlet and adjacent a gas outlet of the reactor are measured with pressure sensors. An algorithm is applied to at least one of the pressure measurements to determine the size of particles within the reactor. The determined size of the particles can be used to control the operation of the reactor. A dosing system and method is provided for measuring defined volumes of particles for transport to the reactor.