Vibrating screen device

Abstract

To provide a vibration sieve apparatus, a stoker type incinerator and a valuable metal recovery method which can be achieved by only improvement of an existing stoker type incinerator, suppress an energy increment, and can recover valuable metals.SOLUTION: A vibration sieve apparatus 1 includes a vibration sieve tank 20, and vibration imparting means 23 for vibrating the vibration sieve tank, wherein the vibration sieve tank 20 is provided with a non-porous plate 12 provided on the upper surface, a sieve plate 10 which is adjacent to the non-porous plate 12 and is provided on the upper surface positioned below the non-porous plate 12, a wind force selection nozzle 14 which is positioned between the non-porous plate 12 and the sieve plate 10 and spouts gas onto the sieve plate 10, an air introduction port 27 for introducing air into the vibration sieve tank 20, and a discharge port 30 in the bottom part of the vibration sieve tank 20.SELECTED DRAWING: Figure 3

Claims

1. A vibrating sieve device installed in a stoker-type combustion furnace in which the internal pressure of the incinerator can be adjusted to a negative pressure, which re-draws the lightweight components of the main ash into the incinerator and classifies and recovers the small-particle heavier components of the main ash, It comprises a vibrating sieve tank and means for applying vibration to vibrate the vibrating sieve tank, In the vibrating sieve tank, A non-perforated plate is provided on the top surface, A sieve plate is provided on the upper surface adjacent to the non-perforated plate and located below the non-perforated plate, A wind-powered separation nozzle is positioned between the non-perforated plate and the sieve plate and ejects gas onto the sieve plate. An air inlet for introducing air into the vibrating screen tank, The discharge port at the bottom of the vibrating screen tank, A vibrating screen device characterized by having a feature.

2. The vibrating sieve apparatus according to claim 1, characterized in that the vibrating sieve tank is further provided with an exhaust gas inlet for introducing exhaust gas generated in the incineration facility into the vibrating sieve tank.

3. The vibrating sieve apparatus according to claim 1, further characterized in that the vibrating sieve tank is provided with a guide plate that directs the introduced air toward the wind separation nozzle.

4. It is a stoker-type incinerator, A vibrating screen device is installed adjacent to the downstream side of the final stoker zone, A large particle size heavy component chute for dropping large particle size heavy components is provided adjacent to the downstream side of the above-mentioned vibrating sieve device, The above-mentioned vibrating screen device is equipped with a dust ash conveying conveyor that drops small-particle weight components from the discharge port at the bottom, The above-described vibrating sieve apparatus comprises a vibrating sieve tank and a means for applying vibration to vibrate the vibrating sieve tank. In the vibrating sieve tank, A non-perforated plate is provided on the top surface, A sieve plate is provided on the upper surface adjacent to the non-perforated plate and located below the non-perforated plate, A wind-powered separation nozzle is positioned between the non-perforated plate and the sieve plate and ejects gas onto the sieve plate. An air inlet for introducing air into the vibrating screen tank, The discharge port at the bottom of the vibrating screen tank, A stoker-type incinerator characterized by having a stoker.

5. The stoker-type incinerator according to claim 4, characterized in that the vibrating sieve tank is further provided with an exhaust gas inlet for introducing exhaust gas generated in the incineration facility into the vibrating sieve tank.

6. The stoker-type incinerator according to claim 4 or 5, further comprising an ash extrusion device for receiving large-particle weight components from the large-particle weight component chute.

7. It is a stoker-type incinerator, A main ash chute is provided adjacent to the downstream side of the final stoker zone of a stoker-type incinerator, and a vibrating screen is provided below the main ash chute. A large particle size heavy component chute for dropping large particle size heavy components is provided adjacent to the downstream side of the above-mentioned vibrating sieve device, The above-mentioned vibrating screen device is equipped with a dust ash conveying conveyor that drops small-particle weight components from the discharge port at the bottom, The above-described vibrating sieve apparatus comprises a vibrating sieve tank and a means for applying vibration to vibrate the vibrating sieve tank. The above vibrating sieve tank includes: A non-perforated plate is provided on the top surface, A sieve plate is provided on the upper surface adjacent to the non-perforated plate and located below the non-perforated plate, A wind-powered separation nozzle is positioned between the non-perforated plate and the sieve plate and ejects gas onto the sieve plate. An air inlet for introducing air into the vibrating screen tank, The discharge port at the bottom of the vibrating screen tank, A stoker-type incinerator characterized by having a stoker.

8. The stoker-type incinerator according to claim 7, characterized in that the vibrating sieve tank is further provided with an exhaust gas inlet for introducing exhaust gas generated in the incineration facility into the vibrating sieve tank.

9. The stoker-type incinerator according to claim 7 or 8, further comprising an ash extrusion device for receiving large-particle weight components from the large-particle weight component chute.

10. A method for recovering valuable metals from the ash of a stoker-type incinerator according to claim 4 or 7, wherein (1) the vibrating sieve tank is vibrated with air introduced into or stopped from being introduced into the vibrating sieve tank, causing the main ash on the non-perforated plate to move toward the sieve plate and segregating the small-particle weight components to the lower layer and the light-particle and large-particle components to the upper layer, (2) Air is introduced from the air inlet of the vibrating sieve tank, and air is blown out from the air separation nozzle to suspend the light components of the main ash moving from the non-perforated plate to the sieve plate and draw them back into the incinerator, and the heavier components fall onto the sieve plate. (3) Of the main ash that falls onto the sieve plate, the large-particle weight component is dropped into the large-particle weight component chute, and the small-particle weight component is sieved into the vibrating sieve tank for classification. A recovery method characterized by the following.

11. A method for recovering valuable metals from the ash of a stoker-type incinerator according to claim 5 or 8, wherein (1) with gas introduced into the vibrating sieve tank or with gas introduction stopped, the vibrating sieve tank is vibrated to move the main ash on the non-perforated plate toward the sieve plate and segregate the small-particle weight components to the lower layer and the light-particle and large-particle components to the upper layer, (2) Air is introduced from the air inlet of the vibrating sieve tank, exhaust gas is introduced from the exhaust gas inlet, and the mixture of air and exhaust gas is ejected from the air separation nozzle to suspend the light components of the main ash that have moved from the non-perforated plate to the sieve plate and to be drawn back into the incinerator, and the heavier components fall onto the sieve plate. (3) Of the main ash that falls onto the sieve plate, the large-particle weight component is dropped into the large-particle weight component chute, and the small-particle weight component is sieved into the vibrating sieve tank for classification. A recovery method characterized by the following.

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