JPH023119B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fluidized bed furnace, and more particularly to an improvement in an air supply device for supplying hot gas to a floating fluidized bed from the lower part thereof.

Conventionally, to configure a fluidized bed furnace, as shown in FIG. 2, an air supply device A consisting of a hot air generating furnace 12, an electric blower 13, etc. is connected below the dispersion plate 3 of the floating fluidized bed 6. The material to be processed, which is introduced from the supply path 5 onto the distribution plate 3, is burned, dried or heated while floating and flowing with high-temperature gas supplied under pressure from the air supply device A. The discharge pressure is about 600 to 700 mmAq. For example, when burning granular coal, the thickness of the fluidized bed 6 can only be about 20 cm in a stationary state, which is insufficient in terms of processing capacity.

An object of the present invention is to make it possible to significantly increase the supply pressure of high-temperature gas by improving the air supply device.

The characteristic configuration of the fluidized bed reactor according to the present invention is that, in order to constitute the air supply device that supplies high-temperature gas to the floating fluidized bed from the lower part thereof, a compressor that supplies oxygen-containing gas under pressure is continuously connected to a gas turbine;
A combustor is interposed in the air supply path from the compressor to the gas turbine, and a flow path for supplying fuel to the combustor, and a flow path for pressurizing high-temperature gas from the gas turbine to the floating fluidized bed. This is because we have established

The effects of the characteristic configuration of the present invention are as follows. In other words, the compressor is driven by a turbine operated by high-temperature, high-pressure gas from the combustion chamber.
By supplying high-temperature, high-pressure oxygen-containing gas to the combustion chamber, it becomes possible to supply gas from the turbine at a high pressure of 2000 to 3000 mmAq. and a high temperature of 650 to 700°C to the floating fluidized bed. When burning coal, the thickness of the floating fluidized bed can be doubled or more than before, and the thickness of the floating fluidized bed can be greatly increased, making it possible to effectively improve the processing capacity of fluidized bed furnaces. .

Next, an example will be shown with reference to FIG.

A dispersion plate 3 provided with ventilation holes over the entire surface is provided in a furnace body 2 having a flue 1 at the top.
The air supply device A is connected to the air supply chamber 4 formed below the dispersion plate
A fluidized bed furnace is configured to form a floating fluidized bed 6 for burning, heating, or drying a workpiece by suspending it with high-pressure, high-temperature gas ejected upward from the workpiece.

To configure the air supply system A, a compressor 7 that supplies air under pressure is connected continuously to a gas turbine 8, and a burner-type combustor 9 is interposed in the air supply path from the compressor 7 to the gas turbine 8. A flow path 10 is connected to the combustor 9, and a flow path 11 is provided to supply high-pressure high-temperature gas from the gas turbine 8 to the air supply chamber 4 of the fluidized bed furnace. For example, if the pressure is 10000
After supplying combustion air at 100°C with mmAq. and driving the gas turbine 8 with the high-pressure high-temperature gas generated in the combustor 9,
or 3000mmAq., and the temperature is 650 to 700℃,
Floating fluidized bed 6 with an oxygen concentration of 12-13%
It is structured so that it can be supplied to the following countries.

Next, another example will be shown.

The combustor 9 is of a catalytic combustion type, and a fuel gas supply passage 10 is connected to the upstream side of the compressor 7.

The composition, oxygen concentration, etc. of the gas supplied to the compressor 7 can be changed as appropriate, and these gases are collectively referred to as oxygen-containing gas.

The fluidized bed furnace can be used for various purposes, such as heating purposes such as process heating, precious metal regeneration, and metal heat treatment, combustion purposes such as waste incineration, and various drying purposes.

[Brief explanation of drawings]

FIG. 1 is a flow sheet showing an embodiment of the present invention, and FIG. 2 is a flow sheet of a conventional example. 6...Floating fluidized bed, 7...Compressor, 8
...Gas turbine, 9...Combustor, 10...Fuel supply channel, 11...High temperature gas pressure feeding channel, A...
...Air supply device.

Claims (1)

[Claims] 1. To configure the air supply device A that supplies high-temperature gas to the floating fluidized bed 6 from its lower part, a compressor 7 that supplies oxygen-containing gas under pressure is connected to a gas turbine 8, and a compressor 7 is connected to the gas turbine 8 from the compressor 7 to the gas turbine. A flow path 1 in which a combustor 9 is interposed in an air supply path to 8 and supplies fuel to the combustor 9.
0, and a flow path 11 for pumping high-temperature gas from the gas turbine 8 to the floating fluidized bed 6.