Abstract: A diagnosis device for diagnosing a plant based on an operating state of the plant includes a monitoring data acquisition unit configured to acquire a plurality of monitoring data which are measurement values of a parameter related to the operating state of the plant measured at different times, a diagnosis target pattern generation unit configured to generate a diagnosis target pattern that is a plot pattern where each of the plurality of monitoring data is plotted against plant output data of the plant, and a pattern diagnosis unit configured to diagnose the plant based on the plot pattern of the diagnosis target pattern.

Abstract: A diagnosis device for diagnosing a plant based on an operating state of the plant includes a monitoring data acquisition unit configured to acquire a plurality of monitoring data which are measurement values of a parameter related to the operating state of the plant measured at different times, a diagnosis target pattern generation unit configured to generate a diagnosis target pattern that is a plot pattern where each of the plurality of monitoring data is plotted against plant output data of the plant, and a pattern diagnosis unit configured to diagnose the plant based on the plot pattern of the diagnosis target pattern.

Abstract: This method for inhibiting the occurrence of a pyrolysis deposit in a pyrolysis gasification system includes: gasifying biomass (S2) through pyrolysis in a pyrolysis gasification furnace (5); separating, in a solid-gas separation unit (7), a pyrolysis gas (G1) and a carbide (C) continuously formed through pyrolysis of the biomass (S2); feeding an oxygen-containing gas (G3) to the separated pyrolysis gas (G1); and introducing the pyrolysis gas (G1) together with the oxygen-containing gas (G3) to a combustion furnace (6) through a pipe (9) which constitutes a pyrolysis gas line (8).

Abstract: This method for inhibiting the occurrence of a pyrolysis deposit in a pyrolysis gasification system includes: gasifying biomass (S2) through pyrolysis in a pyrolysis gasification furnace (5); separating, in a solid-gas separation unit (7), a pyrolysis gas (G1) and a carbide (C) continuously formed through pyrolysis of the biomass (S2); feeding an oxygen-containing gas (G3) to the separated pyrolysis gas (G1); and introducing the pyrolysis gas (G1) together with the oxygen-containing gas (G3) to a combustion furnace (6) through a pipe (9) which constitutes a pyrolysis gas line (8).

Abstract: The melting equipment has a melting furnace that combusts and melts ash, a secondary combustion chamber disposed above the melting furnace, a slag extraction chute that guides slag generated in the melting furnace downward, a bypass channel (20) that connects the slag extraction chute and the secondary combustion chamber, an ejector (22) that is provided between the bypass channel (20), has a contraction portion (23) at which the channel cross sections are narrowed, and suctions the combustion exhaust gas (G) into the bypass channel (20), and an adhesion-prevention unit (31) (41) that prevent an incorporated substance that incorporates into the combustion exhaust gas (G) from attaching to the inner wall surface (21a) of the ejector (22).

Abstract: The object of this invention is to provide an ash-melting furnace which can respond to fluctuations in the load and which will be capable of highly efficient and stable operation. In an ash-melting furnace which heats and melts the primary ash and the fly ash obtained by combustion together, this invention is characterized by supplying the primary ash (ash containing rough particles) from upper end of the furnace to form an upper layer of a two-tiered layer of ash, supplying the fly ash (ash containing minute particles) from an upper end of the furnace to form a lower layer of the two-tiered layer of ash, moving the two-tiered layer together towards the far end of the furnace, and heating and melting the two-tiered layer by a burner to form molten slugs during the moving step. When the burner is an oxygen-enriched burner, this configuration makes it possible to control the volume of oxygen to be added to the burner air (including changing the density of the oxygen).