JPH0645023B2 - Storage transport device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to formation of a hydrated salt when a substance mainly composed of fine particles is molded and solidified into a granular solid using a hydrated salt growth reaction and discharged. The present invention relates to an improvement of a storage device that stores a granular molded article obtained by humidifying and molding fine particles containing a substance to cause a hydrate salt growth reaction to transform the granular molded article into a granular solid and discharge the granular solid. Is.

In particular, in the storage device, curing is performed when a substance mainly composed of fine particles of dry or low water content is formed into a granule and solidified by utilizing a hydrated salt growth reaction of cement, calcium salt, magnesium salt, etc. As fine particles that are the target substance, for example, municipal waste, waste such as sewage sludge, coal, bark, bagasse,
Examples include ash of solid fuel such as waste wood, sludge and dust discharged in various exhaust gas treatment and wastewater treatment processes.

[Conventional technology]

As mentioned above, ash, sludge, dust, etc., generate violent dust, spill or adhere when directly loaded on a vehicle for transportation or unloaded at the final disposal site.
Even at the final disposal site, it will rise up due to the wind. In addition, there is a risk of environmental pollution if the substance contains harmful substances such as heavy metals and organic chlorine compounds.

Therefore, recently, as a means for solving these problems, if necessary, it is mixed with cement or other hydrated salt-forming substance (hereinafter simply referred to as "cement"), granulated, molded, solidified, and then discharged. Start to be adopted.

That is, cement is added to a substance mainly composed of fine particles as a target, but if it contains calcium salt or magnesium salt as its component in advance and solidifies by causing a hydrate salt growth reaction by water addition. For example, without adding cement in particular, humidification, kneading, through a molding process into a hard muddy granular molded product, which is cured to carry out a hydrate salt growth reaction and withstands handling to a certain extent, To the extent that it exhibits the desired durability even when exposed to rain and wind at the final disposal site,
It is carried out after proceeding with the solidification reaction. This humidification has a range depending on the diameter and type of fine particles, granular molding means, water salt content, etc., but is usually about 8 to 30% by weight, and 12 to 20% if trying to suppress adhesion and dust generation. It is preferable to set the water content to some extent, and it has been confirmed experimentally.

By the way, even if it is simply said to be cured, it is a hard muddy granular product immediately after the molding step, and the particles are adhered to each other because they are wet and soft. If this granular molded product is simply put into the storage part and stored, it will be put into the storage part before it is sufficiently solidified, and the granular molded products of different angles will adhere to each other within the storage part and will be consolidated and agglomerated. Happens. In particular, in rolling granulation, this tendency is strong because water is exuded on the surface of the granulated product in principle. This is likely to occur because the amount of humidifying water is large, but if it is too small, it becomes easy to generate dust and becomes a problem.

When granular molded products adhere to each other and form agglomerates, even if the entire bottom of the storage part has a bunker structure like a discharge gate, it will be in a so-called bridge state in which discharge is not possible even if the bottom gate is opened. Turn into a baby boom. In addition, even if it is managed to be discharged, a large chunk of more than several hundred kilograms will fall on the vehicle bed, and the impact will affect the vehicle. I have trouble handling it at the disposal site.

Therefore, various measures have been taken conventionally for that purpose. Once it is temporarily placed in it, the solidification reaction proceeds to a certain extent, and when it is put into the storage part, the adhesion of the particles until then has not been sufficiently solidified due to the impact of the drop etc. There is a method in which it breaks or breaks into pieces, breaks up again, and has already been solidified to some extent, so that adhesion and nodularity do not occur so much. For example, there is a method called a curing conveyor, in which granular molded products are loaded on a wide conveyor belt that moves slowly or intermittently, and solidification time is earned by the residence time on the belt.

However, this method requires a large space because it requires a large conveyor and has a special movement, which is costly. In addition, the solidified particles cannot be avoided from adhering to the belt, and the damage is severe, and the return roller and the belt reversing part are also heavily soiled and adhered, which makes maintenance difficult and the working environment becomes dusty. There wasn't.

Further, as shown in FIG. 2, a sub hopper 32 having an opening / closing gate 33 on the lower surface is connected to the upper side of the storage tank 31, the sub hopper 32 once receives the granular molded product, and the gate rotating shaft 34 is rotated at regular intervals. In some cases, the opening / closing gate 33 is alternately opened left and right to drop the granular molded product into the storage tank 31, and the solidified granular solid is discharged by opening the discharge gate 36 by rotating the discharge gate rotation shaft support 35.

[Problems to be solved by the invention]

In this conventional example, a large belt conveyor is certainly unnecessary, but a cylinder for driving the gate rotating shaft 34 is required, and the storage tank 31 of the sub hopper 32 is raised, but the storage tank 31 is increased. It was difficult to obtain a large storage capacity because the cross-sectional area could not be increased. Therefore, in order to increase the storage capacity, it is necessary to arrange a plurality of storage tanks each equipped with a sub hopper, and connect each sub hopper with a switching belt conveyor. This switching conveyor is also the same as the curing conveyor described above. There was a problem.

In addition, although there are various problems regarding the transportation of granular molded products on the belt conveyor, the unloading position is often changed due to layout reasons, reduction of the building area, and improvement of the work environment related to dust, etc. Therefore, it may be necessary to use a belt conveyor because it may be separated from the molding device for the granular molded product, may be in a different room, or only the carry-out position may be outdoors. It was

The present invention solves these various problems, particularly the problems relating to the belt conveyor, prevents the granular molded article from being conveyed by the belt conveyor, and prevents solidification and agglomeration, which may cause a bridge in the reservoir. It is possible to provide a storage / conveyance device that enables smooth discharge, and that can easily accommodate a plurality of storage tanks due to an increase in storage capacity even in the case of a storage unit type using a storage tank. It is intended.

[Means for solving problems]

The present invention comprises a supply mechanism having a charging unit for a granular molded product and an discharging unit capable of intermittent discharging, and a reciprocating transporting container for supplying the granular molded product from the supplying mechanism and transporting it to an unloading position. , Attaching the upper pulley and the lower pulley to the transport container,
The upper and lower sheaves are moved along a guide rail having a stopper at the terminal end, and the lower sheave is wound up and lowered by a drive wire through a frame onto an electric winch. It is configured to be inverted.

[Action]

The target fine particles to be molded and solidified into a granular solid by the hydrated salt growth reaction are mixed with cement as necessary, humidified and molded into a granular molded product, and charged into the supply mechanism through a charging unit. The granular molded products put into the feeding mechanism are held in the feeding mechanism for a certain period of time to be described later, and after solidification or surface drying progresses to some extent, they are discharged from the discharging section into the transport container and adhere to each other due to the impact. Even if the granular molded product is disassembled and stored in the transport container, it is already deformed and the adhesive property is considerably lost, so that compaction, agglomeration, and bridge are less likely to occur. The transport container also functions as a storage unit as it is, and inside it is cured for solidification by the hydrate salt growth reaction, moved to the carry-out position, and the particulate solid is discharged from the discharge mechanism to the storage tank.

Next, the transport container returns to the discharge part of the supply mechanism again, but the granular molded product is held in the supply mechanism for a certain period of time during which the transport container reciprocates, and the solidified state is advanced to some extent.

In this way, the curing for solidification is performed in both the supply mechanism and the transport container, and the loosening effect of the granular molded product becomes large. Further, during the reciprocating movement of the transfer container, the granular molded product does not drop unintentionally because it is always in the normal position.

Thus, when the granular molded product is discharged at the carry-out position of the transport container, the granular molded product is easily disassembled, handling is facilitated, and dust generation and diffusion of harmful substances can be suppressed.

In addition, even if the molding device and the unloading position are significantly separated, or even if it is in a different room, it is easy to convey the entire container while it is stored in the container, and a belt conveyor is not required, and maintenance or dust generation is not required. There are no problems.

〔Example〕

An embodiment of the present invention will be described with reference to FIG.
Reference numeral 1 denotes a supply mechanism, which corresponds to a charging chute 3 which is directly attached to a discharge part of a granular molded product of a molding device 2 for humidifying and molding fine particles containing cement, or a discharge chute 3 which is attached to a lower part of the molding device. A storage capacity, that is, a transfer container, having a discharge portion for suppressing or causing the damper 4 or a granular molded article corresponding thereto due to gravity or the like and allowing the granular molded article generated when the outflow is suppressed to be retained. Has a storage capacity capable of holding the granular molded product while reciprocating from the discharge damper 4 to the storage tank 12.

Reference numeral 5 denotes a transfer container, the upper part of which is capable of communicating with the discharge damper 4 of the supply mechanism 1, and restricts the power source that enables vertical and horizontal movement, the control of the power source, and the action of power. It is provided with a drive mechanism including a guide portion and the like that move in a fixed direction. For example, as in the illustrated example, the transport container 5
The upper pulley 6 and the lower pulley 7 are attached to the lower pulley 7, and the upper and lower pulleys 6 and 7 are connected by the drive wire 9 which is connected to the lower pulley 7 via a frame for bypassing the transport container 5 and is wound up and down by an electric winch 8 or the like. By moving along the guide rails 11 provided with stoppers 10 at the upper and lower ends, the transport container 5
Are moved up and down, and the transport container 5 is turned upside down at the upper end portion to feed the contents into the feeding port 13 of the storage tank 12.

At the bottom of the storage tank 12, a discharge gate 16 that is rotated by a gate cylinder 14 around a discharge gate rotation shaft 15 as a fulcrum.
Is provided so that the discharge vehicle 17 can enter and leave the lower part of the discharge gate 16.

Then, the fine particles containing cement are humidified and molded by the molding device 2 to form a granular molded product, which is charged into the charging chute 3 and solidified to such an extent that the discharging container 5 is held until the discharging damper 4 is discharged. It is opened and supplied to the transport container 5. When the transport container 5 is almost filled with the granular molded product or when a predetermined time is reached, the electric winch 8 is driven to wind up the drive wire 9 to move the transport container 5. When the transport container 5 moves, since the upper and lower pulleys 6 and 7 are pressed by the guide rails 11, the lower pulley 7 maintains the same top and bottom as the state where the lower pulley 7 receives the granular molded product in the vicinity of the lower stopper 10. However, when the upper pulley 6 is stopped by the upper stopper 10 at the upper end, the transport container 5 is in a state where the bottom is lifted by the drive wire 9 connected to the lower pulley 7, and the upper pulley 6 is used as a fulcrum. The granular molded product which is rotated and accommodated to a certain degree and which has progressed to a certain degree is discharged to the storage tank 12.

Next, the carrier container 5 returns to the position of the discharge damper 4, and during that time, the granular molded product charged from the molding device 2 is held in the charging chute 3 and is solidified to some extent. The above operation is repeated again. Therefore, the granular molded product discharged to the storage tank 12 is being solidified while the charging chute 3 and the transport container 5 are moving, so that adhesion and nodularization in the storage tank 2 are prevented, and further storage, It is cured and solidification is promoted. The granular solid thus sufficiently solidified is opened by the gate cylinder 14 and the discharge gate 16 is opened appropriately, and is loaded into the carry-out vehicle 17 in a separated state and carried out.

The storage tank 12 may be omitted. In that case, the transport container 5 may have a capacity sufficient to fulfill the function of the storage tank 12.

The rotation angle of the transport container 5 depends on the angle at which the granular molded product in the transport container 5 slides down by gravity, for example, depending on the molded product, but the inner wall of the transport container 5 is inclined at least 50 °, preferably 60 ° or more. Need, but transport container 5
Since it may be difficult to remove by sticking to the surface of the carrier container 5, the surface of the carrier container 5 that contacts the granular molded product may be coated or stretched with, for example, Teflon, polyethylene, or another material with good peelability. However, it is necessary to facilitate peeling. If adhesion is particularly likely to occur, it is desirable to perform the same treatment on all other parts where the granular molded product comes into contact. In some cases, those parts may be easily deformed with a material such as soft plastic or rubber that is easily deformed, and may be peeled off by utilizing the fact that the transfer container 5 is deformed by the movement of the load.

In the above-described embodiment, the movement of the transport container 5 is an elevator commonly called a skip hoist, and therefore the molding device 2 is used.
Can be installed low, and the equipment located upstream of the molding machine 2 can be installed sequentially upward, so that the entire equipment can be installed in the building even if the conveyors connecting them are omitted. It is also possible to eliminate the protrusion of the building in that part. Further, in the first illustrated example, the transport container 5
In order to prevent the carrying power from becoming unreasonable, it would be too heavy if the tank had the function of the tank until the final solidification.
2 is provided separately.

In addition, although the bottom surface full gate type discharge mechanism of the storage tank 12 is adopted, a screw or vibrator type may be used, and the mechanism becomes a little complicated. Further, it is desirable that the charging chute 3 in the supply mechanism 1 has a structure in which it spreads toward the end and is easily peeled off and dropped, or a vibrator is further attached to ensure peeling off.

〔The invention's effect〕

As described above, according to the present invention, a granular molded article obtained by humidifying and molding fine particles containing cement is temporarily received by a supply mechanism or a transport container to be solidified to some extent, and the adhesiveness and the deformability are reduced before the transport. There is no spillage by inverting the container and carrying it out, and moving the container after returning the posture to the upward direction, and preventing the compacted aggregate of the granular molded product and the occurrence of bridges, dust prevention, handling improvement, This has the effect of demonstrating effective measures against harmful substances, and by simply changing the container, the structure is simple and compact, and it can be easily distributed to multiple storage parts. It can be transported up and down all the way and even over long distances without the need for belt conveyors.

In particular, it facilitates the use of storage equipment for solidification of fine particles when the molding device and the solid solid carry-out position are distant or want to be separated. The contribution of the present invention is extremely large, for example, a great effect can be obtained even in increasing the flexibility of design.

[Brief description of drawings]

FIG. 1 is a partial sectional explanatory view showing an embodiment of the present invention, and FIG. 2 is a sectional explanatory view showing a conventional example. DESCRIPTION OF SYMBOLS 1 ... Supply mechanism, 2 ... Molding apparatus, 3 ... Input chute, 4 ... Ejection damper, 5 ... Conveyor container, 6 ... Upper pulley, 7 ... Lower pulley, 8 ... Electric winch, 9 ... Drive wire, 10 ... Stopper, 11 ... guide rail, 12 ... storage tank, 13 ... input port, 14 ... gate cylinder, 15 ... discharge gate rotating shaft, 16 ... discharge gate, 17 ... discharge vehicle, 31 ... storage tank, 32 ... sub hopper, 33 ... opening / closing Gate, 34 ... Gate rotating shaft, 35 ... Discharge gate rotating shaft, 36 ... Discharge gate.

 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Michio Kitagawa 11-11 Haneda Asahi-cho, Ota-ku, Tokyo Ebara Corporation (72) Inventor Toshimitsu Aoki 11-11 Haneda-asahi-cho, Ota-ku, Tokyo Inside the EBARA CORPORATION (56) References: Actual Development Sho 53-81661 (JP, U)

Claims (1)

[Claims] 1. An apparatus for molding and solidifying fine particles into a granular solid by using a hydrated salt growth reaction, and discharging the granulated solid obtained by humidifying and molding fine particles containing a hydrated salt forming substance. And a delivery container having a discharge part capable of intermittent discharge and a reciprocating transport container for transporting the granular molded product from the supply mechanism to an unloading position. The transport container includes an upper pulley and a lower slide. A car is attached to the upper and lower sheaves so that the sheaves can be moved along a guide rail having a stopper at the terminal end, and the lower sheave is hoisted and lowered by a drive wire through a frame onto an electric winch. A storage / conveyance device characterized in that the storage / conveyance device is configured to be turned over to the inlet of the storage tank.