JPS5815035Y2 - Iron recovery equipment from combustion residue - Google Patents

Description

[Detailed description of the invention] This invention relates to a device for recovering iron from combustion residue discharged from an incinerator, and in particular efficiently removes ash, sludge, etc. attached to or mixed in on the surface or inside of iron products, resulting in high quality products. This invention relates to an improved iron recovery device capable of recovering iron.

The combustion residue discharged from the incinerator contains a large amount of iron from empty cans, nails, iron fittings, etc., and it is customary to collect and reuse these iron contents from the viewpoint of effective resource utilization.

Magnetic separators have traditionally been used as iron recovery equipment for this purpose, but ash and sludge adhere to or mix with the iron recovered by the magnetic separators, which poses a major hindrance to the reuse of the recovered iron. bring.

Recently, a technique has been proposed in which iron collected by a magnetic separator is treated with a water washing device equipped with a water ring scraper conveyor to remove the ash and sludge.

That is, this method uses iron (ash, ash, etc.) collected by a magnetic separator.
The sludge (with sludge, etc. attached) is put into the washing device and immersed, the settled iron is collected by a scraper conveyor that rotates along the bottom of the washing device, and the water is drained while being carried out along the slope of the washing device. This process is used to clean iron.

However, even with this type of device, the sludge removal effect is insufficient because the settled sludge that has settled at the bottom of the water washing device is collected and carried out along with iron by the scraper conveyor.

Therefore, the iron washed by the above-mentioned method still contains a considerable amount of sludge, etc., and subsequent washing operations are required, increasing the recovery cost.

Therefore, obtaining high-quality recovered iron by removing ash, sludge, etc. in the iron recovery process at an incinerator as efficiently and at low cost as possible is extremely important in promoting the effective reuse of recovered iron. This is desirable.

The inventor focused on the above-mentioned circumstances and developed a device that would remove as much as possible of the ash, sludge, etc. that adhered to the iron during the series of iron recovery processes and obtain high-quality recovered iron. We have been conducting intensive research.

As a result, he discovered that the device shown below could achieve his goal, and he finally completed the invention.

In other words, the configuration of the iron recovery device according to the present invention is an iron recovery device that collects iron in the residue discharged from an incinerator using a magnetic separator, and processes and recovers it using a water washing device equipped with a water ring scraper conveyor. Then, a water sprinkler is placed above the inclined surface on the iron delivery side of the water washing device, and a button is pressed at an appropriate position on the inclined surface to form a gap between the trough surface and the scraper, and the part where the gap is formed is The gist lies in the fact that a relatively coarse screen is provided on the inclined surface.

The configuration and effects of the present invention will be explained below based on the drawings as examples, but the following are only representative examples, and the design can be changed as appropriate in accordance with the spirit of the above and below. All of these are included in the scope of the technology of this invention.

FIG. 1 is a partially cutaway schematic diagram illustrating the iron recovery device according to the present invention. The combustion residue A that is collected, fed into a water washing device 4 via a chute 3, and from which iron has been removed is sent to a subsequent secondary treatment facility by a carry-out conveyor 5.

The water washing device 4 has a water tank 6 for washing, a chain 7 scooping scraper 8 that rotates along the bottom surface of the water tank 6, and an inclined surface 9 that constitutes an iron delivery section. constitutes a trough for the chain 1 and the scraper 8.

Therefore, the iron content Al put into the water tank 6 is washed with water while sinking, and after being sequentially captured by the scraper 8, it is sent out from the water tank 6 along the slope 9, and from the chute 10 provided at the tip of the slope 9, it is sent out as needed. The iron is sent to the iron pit 12 via a distributor 11 installed in the same place.

By the way, with the above configuration, the sludge that settled on the bottom of the water tank 6 (adhered to the iron content during the magnetic separation process) will become the iron content AI.
At the same time, the iron is sent out along the inclined surface 9, and the quality of the recovered iron deteriorates.

Therefore, in the present invention, a water sprinkler 13 is arranged above the inclined surface 9 to wash away the iron that is being sent out.

Moreover, at the appropriate location on the slope 9 part, as shown in Figure 2 (■- in Figure 1)
■ Equivalent pressure to the wire breakage cross section As shown, there is a gap (generally 10 to 20
mm), and the structure is such that the sludge that falls off from the iron particles due to the water sprinkling flows down along the slope.

Furthermore, a relatively coarse screen 1 is provided on the inclined surface 9 in this part.
4 is provided so that the fallen sludge penetrates the slope 9 and flows downward.

By configuring and pressing the button in this way, the sludge sent out from the bottom of the water tank 6 along with the iron content is almost completely removed by the washing water from the sprinkler 13 during the process of ascending the slope 9.
High quality recovered iron with no sludge attached is collected in the iron pit 12.

Moreover, since the sludge removed in this step is discharged out of the system through the screen 14 each time, there is no fear of sludge accumulating in the water tank 6.

Reference numeral 15 in the figure indicates a leveling device that is installed as necessary, and has the effect of equalizing the amount of iron sent out by each scraper 8 and stirring the empty cans to flush out the sludge contained inside. .

The sludge that has passed through the screen 14 may be sent as is to the sludge treatment facility, but since this sludge contains a large amount of washing water, the following post-treatment may be performed to further simplify the treatment. It is better to strain it.

For example, in FIG. 3, a relatively narrow screen 1 is installed on the back of the screen 14 attached to the inclined surface 9 in a simple sludge treatment facility (viewed from the back side of FIG. 1) that is attached as required.
6 is provided in an inclined manner, and after water is removed at this portion, the sludge is poured into a pit 17, and the water is sent from a recovery water tank 18 to a sewage treatment device as appropriate.

The sludge poured into the pit 17 may be temporarily stored in this area and carried out periodically or at an appropriate time, or it may be carried out continuously from the bottom of the pit 17 using a conveyor 19, 20, etc., as shown in Figure 1. Furthermore, it can be combined with the combustion residue A sent by the carry-out conveyor 5 and post-processed at the same time.

The iron recovery device of the present invention is configured as described above, but its greatest feature is that a water sprinkler is installed above the slope where iron is sent out to wash the iron with water, and the trough in this area A gap is provided between the scrapers, and a screen IJ is placed on the inclined surface to allow the sludge to flow out.

Therefore, as long as these requirements are met, the specific shape and structure of the entire device or each component may be modified in various ways beyond those shown in the figures.

For example, although the screen 14 is shown as having a large number of small holes (usually about 5 to 10 mm in diameter), it is also possible to use a screen with a mesh structure. It can also be removably attached to.

Further, as the magnetic separator 2, a drum type can be used in addition to the belt conveyor type shown in the figure, and it is also effective to provide a pipeline for supplying and draining washing water to the water tank 6 of the water washing device 4. .

Although the structure of the scraper 8 is only shown schematically in the figure, a known structure can be applied as is or with appropriate modifications.

In addition, as a means of creating a gap between the trough and the scraper 8 by pressing the button on the inclined surface 9, a step is provided on the trough surface in the figure, but in addition, guides are provided on both sides of the trough surface so that the scraper 8 can move away from the trough surface. It is also possible to rotate it in a floating state.

Cleaning water supplied to the water tank 6 and water sprinkler 13:
Although it is possible to use industrial water, it is advantageous to use recovered water obtained from an incineration facility or a nearby sewage treatment facility, and of course, the sewage obtained from the water collection pit 18 of the device can be purified. It can also be reused.

Furthermore, the combustion residue A treated with the apparatus of the present invention may be a dry residue or a water-containing residue collected in a water seal system.

The present invention is roughly constructed as described above, and is of great significance in that it can automatically recover iron in combustion residue in an extremely clean state and improve the quality of recovered iron.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway schematic diagram illustrating the iron recovery device of the present invention, Fig. 2 is a conceptual drawing as viewed from the
FIG. 3 is a sketch of the main parts of the inclined surface portion in FIG. 1, viewed from the back. A... Combustion residue, Al... Iron content, 1... Combustion residue conveyor, 2... Magnetic separator, 3... Chute, 4
...Washing device, 6...Water tank, 7...Chain, 8
... Scraper 9 ... Inclined surface, 10 ... Chute, 12 ... Recovered iron pit, 13 ... Water sprinkler, 14.
16...Screen, 15...Kneading device.

Claims (1)

[Scope of utility model registration request] The iron content in the residue discharged from the incinerator is collected using a magnetic separator,
In an iron recovery device that processes and recovers iron content using a water washing device equipped with a water-sealed scraper conveyor, a water sprinkler is disposed above an inclined surface on the iron delivery side of the water washing device, and a water sprinkler is placed above the trough surface at an appropriate position on the inclined surface. An apparatus for recovering iron from combustion residue, characterized in that a gap is formed between the scrapers, and a relatively coarse screen is provided on the inclined surface of the part where the gap is formed.