JP2542891Y2 - Fluidized bed heating and cleaning equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluidized bed heating and cleaning apparatus.

[0002]

2. Description of the Related Art Conventionally, when removing organic substances such as plastics, paints, oils, solvents and the like adhering to metal parts or ceramic articles, a fluidized bed type heating / cleaning apparatus may be used. In this case, generally, a treatment material is charged into a fluidized bed of a fluidized bed heating tank maintained at 150 ° C. to 700 ° C., and attached organic substances are removed by thermal decomposition or vaporization. In this device, Japanese Patent Application Laid-Open
As disclosed in JP-A-155812, vaporized organic matter generated in a fluidized bed is introduced into an insinator section (exhaust gas processing section) and incinerated, and the fluidized bed is heated to a predetermined temperature by the heat of the exhaust gas at the time of incineration. It is designed to hold.

[0003]

However, in the conventional fluidized bed heating and cleaning apparatus, since the temperature of the fluidized bed is raised to the processing temperature by the external heating method, the temperature rise time is long, and There was a problem of inefficiency. Therefore, an object of the present invention is to solve the above-mentioned problem by installing a simple device in an insinelator section, and to provide a fluidized bed type heating and washing apparatus capable of constantly maintaining a fluidized bed at a predetermined temperature.

[0004]

According to the present invention, in order to achieve the above object, a furnace body having a fluidized bed type heating tank is provided with an incinerator section for incinerating vaporized organic matter generated in the fluidized bed, and the incinerator section is provided. In a fluidized bed heating and washing apparatus for heating a heating tank by heat of exhaust gas generated in the above, an on-off valve is provided in a gas supply pipe for flowing to gas dispersing means located in the fluidized bed heating tank, and exhaust of the incinerator section is performed. A cooling means and a heat exchanger for the heating tank are provided in the passage, and the inlet side of the heat exchanger is located upstream of the on-off valve.
The outlet side is connected to the downstream side of the on-off valve via the on-off valve.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In the figure, reference numeral 1 denotes a furnace main body formed by a heat insulating layer 2, and the inside of the furnace main body 1 includes an
And an exhaust passage 13a.
Is provided with a retort (fluidized bed type heating tank) 5 for accommodating fluidized particles 3 such as alumina particles, and a gas dispersing means 6 for jetting out a gas for flow, for example, air, is provided in a lower portion of the retort 5. Have been. Reference numeral 7 denotes a flow blower driven by the following sequence control.

Further, the insinator section 1 of the furnace body 1
3, a burner 8 is provided, and the supply of the combustion air and the fuel gas is controlled by the temperature setting device 9 so that the inside of the insinator section 13 has a predetermined temperature (about 900 ° C.). .

Further, an exhaust gas discharge port 5a provided above the retort 5 communicates with the vicinity of the burner 8 of the insinator section 13 by a pipe 10 having an exhaust fan 11, and the exhaust gas is discharged by a cyclone 12 arranged in the middle of the pipe 10. After the fluid particles 3 in the inside are removed, the organic gas in the exhaust gas is incinerated in the insulator 13. That is, the furnace main body 1 also serves as a gas processing device (insulator section) 13. The gas processing apparatus may be installed separately from the furnace body 1, but if the gas processing apparatus is also used in the furnace body 1 as in the embodiment, the entire apparatus can be reduced in size and the equipment cost can be reduced. be able to.

Reference numeral 14 denotes a cooling air jetting plate for blowing cooling air from a blower 15 onto the side wall of the retort 5 to control the amount of cooling air to be jetted by opening and closing a control valve 17 in response to a signal from a temperature setter 16. Then, the temperature of the fluidized bed 4 is maintained at a predetermined temperature.

Reference numeral 1a denotes a lid for opening and closing the upper opening of the retort 5. When the lid 1a is closed, water vapor is supplied into the retort 5 to prevent the occurrence of explosion due to the vaporized organic matter generated. A steam supply pipe 18 is attached.
Reference numeral 19 denotes a heat exchanger provided in the exhaust passage 13a of the insineator unit 13.
The upstream side of the on-off valve 21 provided in the flowing gas supply pipe 20 from the blower 7 and the outlet side are connected to the downstream side of the on-off valve 21 via on-off valves 22a and 22b, respectively.

Next, an operation method of the fluidized bed type heating / cleaning apparatus having the above configuration will be described. First, while burning the burner 8, the on-off valve 21 provided on the flowing gas supply pipe 20 is closed, while the on-off valves 22 a and 22 b are opened, and the heat exchanger 19 is heated by the high-temperature combustion gas of the burner 8. Is heated to cause a high-temperature (approximately 600 ° C.) fluidizing gas to be ejected from the gas dispersing means 6, and the fluidized bed 4 is placed in the retort 5 while the retort 5 is heated from the inside and the surroundings by the exhausted combustion gas. To form And
The temperature of the fluidized bed 4 is set to the processing temperature (for example, 450 to 550).
° C), the on-off valve 21 is opened and the on-off valve 22a,
22 b is closed, and cool air is supplied to the gas dispersion means 6. Note that, depending on the processing temperature, the on-off valves 21 and 22 may be used.
a, 22b are half-opened, and cold air is
Hot air mixed air may be supplied. As mentioned above,
When the temperature of the fluidized bed 4 reaches a predetermined temperature, the lid 1a is opened and closed, and the treatment material to which organic substances are attached is charged into the fluidized bed 4 as in the conventional case, and normal operation is performed.

The vaporized organic matter contained in the exhaust gas discharged from the fluidized bed 4 is supplied to the incinerator section 13 in the furnace body 1.
After the retort 5 is heated together with the combustion exhaust gas from the burner 8, it is discharged outside the furnace.

[0012]

As is apparent from the above description, according to the present invention, the temperature rise of the fluidized bed is achieved by direct heating of the fluidizing gas heated by the high-temperature combustion exhaust gas in the insinator section and external heating of the combustion exhaust gas. Therefore, the rise time of the fluidized bed can be reduced from 4 hours to 13 hours, for example, in the case where only the conventional external heating is required, and the operation efficiency can be greatly improved. In addition, cooling means is provided outside the heating tank, and by adjusting the temperature of the flowing gas, the organic gas generated by the vaporization and thermal decomposition of the organic substances attached to the processing material is abnormally burned and flows. When the temperature of the bed rises rapidly, cooling from inside and outside of the heating tank becomes possible, and the temperature of the fluidized bed can be maintained at a predetermined temperature in a short time.

[Brief description of the drawings]

FIG. 1 is a schematic view of a fluidized bed heating and cleaning apparatus of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Furnace main body, 3 ... Fluid particle, 5 ... Fluidized bed type heating tank (retort), 6 ... Gas dispersion means, 7 ... Blower, 8 ... Burner,
DESCRIPTION OF SYMBOLS 13 ... Insulator part, 13a ... Exhaust passage, 19 ... Heat exchanger, 20 ... Flowing gas supply pipe, 21,22a, 22
b ... On-off valve.

──────────────────────────────────────────────────の Continuation of the front page (51) Int.Cl. ⁶ Identification code Agency reference number FI Technical display location F23G 5/50 ZAB F23G 5/50 ZABE (56) References JP-A-52-91569 (JP, A Japanese Patent Application Laid-Open No. Sho 60-155812 (JP, A) Japanese Utility Model Publication No. Sho 46-16474 (JP, Y1)

Claims (1)

(57) [Scope of request for utility model registration] A fluidized bed heating and cleaning apparatus comprising: a furnace body having a fluidized bed heating tank; and an incinerator section for incinerating vaporized organic matter generated in the fluidized bed, wherein the heating tank is heated by exhaust gas heat generated in the insinerator section. In the above, while providing an on-off valve in the gas supply pipe for flow to the gas dispersing means located in the fluidized bed heating tank, providing a cooling means and a heat exchanger of the heating tank in the exhaust passage of the insinerator section, The inlet side of this heat exchanger is upstream of the on-off valve,
A fluidized bed heating and cleaning apparatus, wherein an outlet side is connected to a downstream side of the on-off valve via an on-off valve.