JPS6127932Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a heat recovery device from molten slag that recovers high heat contained in molten slag as high-temperature air.

Conventionally, there are many devices for recovering the high heat contained in molten slag by converting the molten slag into finely granulated solids, such as the one shown in FIG. 1, for example.

In this device, the molten slag flowing down from the molten slag drop port 5 is scattered by the granulating injection nozzle 6, and during the scattering, heat exchange is performed with the air in the airtight chamber 1, and the temperature reaches a temperature that does not cause re-fusion. The solid slag particles are collected in the collection section 3 as cooled solid slag particles. On the other hand, the air inside the airtight chamber 1 becomes high-temperature air due to heat exchange with the slag particles, and is passed through the exhaust port 7 to the exhaust fan 1.
5, the air passes through a dust remover 9 to become purified high-temperature air, and the heat is recovered by a heat exchanger 10. (In the figure, 11 is a packed bed of recovered slag, and 1
Reference numeral 7 indicates a cutting device, 12 a heat exchanger, 16 a packed bed fan, etc., which are configured to recover sensible heat from the slag. ) This conventional method had the following drawbacks. In other words, as slag wool is generated, it is unavoidable that the flying slag particles come into contact with the slag wool in the space inside the airtight chamber 1 or in the recovery section, which not only reduces the production efficiency of solid slag particles but also reduces the amount of solid slag particles. This is extremely inconvenient in practical terms, as it becomes a hindrance in transporting the slag particles out of the airtight chamber and supplying them to subsequent equipment, making stable continuous operation of the equipment difficult.

The present invention eliminates the above drawbacks of the conventional method,
This is an epoch-making method that enables the continuous and stable operation of the equipment, improves the production efficiency of solid slag particles, and further ensures the advantage of heat recovery in the slag refinement stage at least more than conventional methods. Hereinafter, one embodiment of the present invention will be described in detail.

In FIG. 2, the slag granulation mechanism section 2 and the solid slag recovery section 3 are the same as those in the conventional method. That is, the slag particles scattered by the slag granulation mechanism are cooled during the scattering, and finally fall to the recovery section 3. On the other hand, most of the generated slag wool is discharged from the airtight chamber exhaust port while floating in the space in a state mixed with slag particles or in a state surrounding a group of slag particles. However, as described above, some of the slag particles come into contact with the slag particles, fall into the recovery section, etc., and remain in the airtight chamber, causing trouble in the operation of the equipment. In the present invention, as shown in FIG. 2b, a plurality of injection nozzles 18 are installed on the side wall or bottom of the airtight chamber 1 where the atomizing nozzle 5 is not located, in a generally horizontal or upward direction. to be placed. By injecting hot air through the heater 20 and the fan 19, the slag wool is almost immediately discharged away from the flight direction of the slag particles to the exhaust port 7 provided on the other side wall or ceiling. Contact is virtually eliminated, eliminating any hindrance to equipment operation.

In addition, in the present invention, by injecting hot air, the temperature of the exhaust gas from the airtight chamber 1 is not practically lowered, so the merits of heat recovery at the slag granulation stage are as follows.
The unit time is roughly the same level as before, and by being able to operate the equipment stably and continuously,
improves. Furthermore, it is clear that the production efficiency of solid slag particles is improved by reducing the amount of solid slag particles that are attached to and removed from the slag wool.

The hot air source used in the present invention to prevent slag wool may heat the outside air with a separately installed heating device 20, but as shown in FIGS. 3 and 4, the hot air source obtained from the airtight chamber 1 After removing dust, a portion of the high-temperature air is extracted, or a portion of the high-temperature air obtained from a solid slag heat exchange device 11 such as a packed bed installed at the latter stage of the airtight chamber 1 is extracted, either alone or mixed with outside air. It is possible to use energy even more effectively by using it.

As described above, the present invention enables prompt removal of slag wool, achieves stable operation of the equipment, and improves both heat recovery merits and solid slag production efficiency compared to conventional methods. expensive.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram showing one embodiment of a heat recovery device according to a conventional method, and Fig. 2 is a schematic diagram showing an embodiment according to the present invention, in which a is a front view and b is an A-A in a.
The cross section, c, is a diagram showing another embodiment of the injection nozzle, and Figure 3 is a diagram showing a hot air source in which high-temperature air obtained from an airtight chamber is partially extracted after dust removal and used alone or mixed with outside air. FIG. 4 is a schematic diagram showing one of the embodiments of the invention. As a hot air source, high-temperature air obtained from a heat exchange device with solid slag such as a packed bed installed at the latter stage of the airtight chamber is used alone or mixed with outside air. 1 is a schematic diagram showing one embodiment of the present invention in use; FIG. 1: Airtight chamber, 2: Slag refining mechanism, 3: Refined slag collection section, 4: Air inlet for collection section, 5:
Slag dropping port, 6: Injection nozzle, 7: Exhaust hole,
8: Solid slag transport device, 9: Dust remover, 10: Heat exchanger, 11: Filled bed, etc., 12: Heat exchanger, 1
3: Injection air fan for atomization mechanism section, 14: Recovery section air fan, 15: Exhaust fan, 16: Packed bed fan, 17: Cutting device, 18: Slag wool countermeasure injection nozzle, 19: Fan for preventing slag wool, 20: Heater for preventing slag wool.

Claims (1)

[Scope of utility model registration request] It is equipped with a slag atomization mechanism that makes the molten slag into fine particles and scatters it inside the airtight chamber, and is also equipped with an air supply port on one side of the airtight chamber and an exhaust port on the other side, so that the air in the airtight room can be heated with the slag particles. In a heat recovery device that extracts high-temperature air through exchange, a plurality of injection nozzles are provided on the side wall or bottom where the atomization nozzle is not located, so as to forcibly inject hot air approximately horizontally or upward. A heat recovery device from molten slag characterized by the following: