JPH0248041Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an apparatus for desalinating sea sand used as aggregate for concrete.

[Prior Art] Conventionally, when desalinating sea sand, the method of simply piling up the sea sand on a flat surface and sprinkling fresh water over it to remove salt was taken. However, this method did not remove salt sufficiently, which caused problems when used in concrete. Furthermore, there was also the problem that the process required a large flat area and was processed in batches, resulting in poor efficiency.

As a seawater desalination device, a device has been proposed in which seawater is supplied onto a screen of a vibrating conveyor, and fresh water is poured over the screen. That is, the conveying surface of the vibrating conveyor is divided into a plurality of zones from the upstream side to the downstream side in the conveying direction, and water used for cleaning in the downstream zone is used as cleaning water in the upstream zone. (Tokkai Sho)
57-110346).

[Problems to be solved by the invention] However, continuously moving sand containing a large amount of water on a vibrating conveyor consumes an extremely large amount of power, and the cost of desalination treatment is extremely high. becomes. In addition, in the vibrating conveyor system, the water applied to the sand on the screen spreads upstream and downstream due to the vibrations and penetrates into adjacent zones, resulting in a low desalination treatment efficiency.

[Means for Solving the Problems] The sea sand desalination apparatus of the present invention has a plurality of pans each having a screen bottom, which are sequentially connected to each other so as to be endlessly rotatable. The bread is conveyed with the bread facing upward, and is equipped with a conveyance device driven by a drive device. On the upper side of this conveying device, a plurality of water sprinkling members are sequentially arranged and installed in the feeding direction of the bread. A fresh water supply pipe is connected to the water spraying member on the most downstream side in the feeding direction.

A water receiver is installed to receive water sprayed from each water spray member and passed through the pan. Also,
A feeding section is provided for feeding water from this water receiving section to an adjacent watering member on the upstream side in the pan feeding direction of the watering member above the water receiving section. The water receiving section and the feeding section constitute a water supply device.

[Operation] In the sea sand desalination apparatus of the present invention, sea sand is supplied onto the pans of the conveying device, and the pans are sequentially conveyed downstream as the conveying device is driven. During this process, water is sprayed from the water spraying member to desalinate the water. Fresh water is supplied to the water spray member on the most downstream side. The sprayed fresh water comes into contact with the sand on the pan, passes through a screen at the bottom of the pan, and is received by a water receiver provided below. This water is sent to a water sprinkling member adjacent to the fresh water sprinkling member in the upward feeding direction, and is sprayed again toward the sand on the pan. Similarly, water is sequentially supplied to the water sprinkling member on the upstream side in the upward feeding direction, and is discharged to the outside of the desalination device after passing through the pan on the most upstream side.

As described above, in the sea sand desalination apparatus of the present invention, sea sand and water are brought into contact with each other in a countercurrent manner, so that desalination can be carried out efficiently with a small amount of fresh water. In particular, this invention uses an endless pan connection as the conveyance device, which allows the sprinkled water to be received by the water receiver without spreading upstream or downstream, increasing the salt concentration in the washing water. As time goes on, it will surely be used to wash the sand on the upstream side, and the resulting sand will have an extremely low salt concentration. Furthermore, in the apparatus of the present invention, the conveying apparatus is an endless connected body of pans, and the power consumption for driving the apparatus is small, so that the power cost for the desalting process is extremely low.

[Examples] The present invention will be described in more detail below with reference to embodiments shown in the drawings.

FIG. 1 is a side sectional view of a sea sand desalination apparatus according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along the line - in FIG.

Reference numeral 10 denotes a device casing, inside which chain wheels 12 and 14 are provided, and the chain 1
6 are suspended endlessly. A plurality of breads 18 are attached to this chain 16, and can travel with the breads facing upward on the upward feeding side. This pan 18 has a screen 20 on its bottom surface as shown in FIG.

A motor 22 is installed on the upper surface of one end of the casing 10, and is capable of rotating the chain wheel 14. In this embodiment, the chain wheel 14 is rotated clockwise in the figure, and the pan 18
The connecting body is moved from left to right in the figure while maintaining an upward attitude on the upward feed side of its endless rotation. A plurality of water sprinkling members 24, 26, 28, 30 are arranged along the pan movement direction on the upper feed side, and a fresh water supply pipe 32 is connected to the water sprinkling member 30 on the most downstream side. . A tank body 34 is installed below the casing 10, and the inside thereof is partitioned by a partition plate 36 into three chambers 38, 4.
0,42 are provided. As shown in FIG. 2, inclined guide plates 44, 46, 48, and 50 for receiving water are provided between the upper feeding side and the lower feeding side of the endless connector of the pan 18, and each water sprinkling member 24 -30 and receives water that has passed through the bottom screen 20 of the pan 18. At the guide plate 44 on the most upstream side, water flows into a discharge path (not shown), but at the other guide plates 46, 4
8 and 50 are connected to the tank body 34 so as to allow water to flow into each of the chambers 38, 40, and 42. Each room 3
Piping 52, 54, 56 for supplying water from 8, 40, 42 to the water spraying members 24, 26, 28 are provided, and pumps 52a, 54a, 56a are installed in the middle.
is provided. (Therefore, in this embodiment, the guide plates 46, 48, 50 and the chambers 38, 40,
42 constitutes a water receiving part, and piping 52, 54, 5
6 and pumps 52a, 54a, and 56a constitute a feeding section. 2, a post 58 is provided upright on the side surface of the casing 10, a guide plate 60 is horizontally fixed on the top of the post, and wheels 62 pivotally attached to both ends of the pan 18 are mounted on the post 58. Guide plate 6
0, the pan 18 is moved while maintaining a predetermined height in the horizontal direction.

An input port 64 is provided at the most upstream side of the casing 10 in the bread feeding direction, and a conveyor 66 is provided for inputting sea sand from above. Also,
A discharge port 68 for washed sand is provided at the other end of the casing 10.

Next, the operation of the sea sand desalination apparatus configured as described above will be explained.

The sea sand 70 is charged from the conveyor 66 through the input port 64 onto the pan 18 located on the most upstream side, and is sequentially conveyed to the right in the figure. During this process, the cleaning water is sprayed from each of the water spray members 24 to 30. As for the cleaning water, fresh water is first supplied to the water sprinkling member 30 via the water supply pipe 32, and is sprayed onto the pan 18 located below the water sprinkling member 30. The sprinkled water falls through the screen 20 while the bread is moving above the guide plate 50, passes through the guide plate 50, and is temporarily stored in the chamber 42 in the tank body 34. Water in the chamber 42 is supplied to the water spray member 28 by a pump 56a and piping 56, and
Water is sprinkled on the pan 18 above 8. This sprayed water falls through the screen 20 while the pan 18 is moving on the guide plate 48, and the water falls into the chamber 40.
are collected in. Water in the chamber 40 is supplied to the sprinkler member 26 through the pump 54a and piping 54, and likewise falls through the screen 20 while the pan 18 is moving on the guide plate 46 and is collected in the chamber 38. . Water in the chamber 38 is supplied to the water spraying member 24 via the pump 52a and piping 52, and is sprayed onto the pan 18 on the most upstream side. At this most upstream side, water passing through the bottom screen 20 of the pan 18 is collected by a guide plate 44 and sent to the drainage system. The bread 18 folded back by the chain wheel 14 is turned upside down and sent toward the chain wheel 16, and when the bread 18 returns, the bread 18 is drained.

In such a sea sand desalination device, fresh water and sea sand are brought into contact with each other in a countercurrent manner, and each water sprinkling member 2
The water sprinkled from 4 to 30 is collected in each chamber 38, 40, 42 without mixing with each other. Furthermore, the water sprayed from the water spray member 24 is sent to the drainage system without entering the chamber 38. Therefore, as the salt concentration in the washing water increases, it is reliably used to wash sea sand with a higher salt concentration, and the washing efficiency is extremely high, and the salt concentration in the sand discharged from the discharge port 68 is reduced. It will be extremely low. In addition, in the sea sand desalination device of the present invention,
Sea sand is transported during processing by rotating an endless connected body of pans, and unlike conventional vibrating conveyors, the power consumption required for sand transport is extremely low.

In the above embodiment, the water spray members are installed in four stages from the upstream side to the downstream side, but it is clear that the number of installed stages may be set to another number. Further, in the above embodiment, the pans 18 are connected by the chain 16 so as to be endlessly rotatable, but various other connection methods may be adopted, such as connecting the pans 18 with each other by links.

[Effects of the invention] As described above, according to the sea sand desalination apparatus of the present invention, sea sand can be processed continuously and efficiently, and sand with extremely high salt concentration can be produced with a small amount of washing water. . Moreover, the power consumption for desalination processing is extremely low, and the cost of sea sand desalination processing becomes extremely low. Furthermore, the present invention has the effect that water is drained when the bread is returned.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of a sea sand desalination apparatus according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along the line shown in FIG. 1. 12, 14... Chain wheel, 18... Pan, 24, 26, 28, 30... Water sprinkling member, 34
... Tank body, 44, 46, 48, 50 ... Guide plate, 52a, 54a, 56a ... Pump, 6
0... Guide prail, 62... Wheel, 66...
conveyor.

Claims (1)

[Claims for Utility Model Registration] A plurality of breads each having a screen bottom are sequentially connected and can be rotated endlessly, and on the upward feeding side of the endless rotation, the breads are fed in an upward position, and the bread is fed by a drive device. a conveyance device that is driven by the conveyance device; a plurality of water sprinkling members arranged sequentially in the bread feeding direction above the conveyance device; and a water sprinkling member connected to the most downstream water sprinkling member in the bread feeding direction. A fresh water supply pipe, a water receiving part that receives water that has been sprayed from each watering member and passed through the pan, and a watering member that is adjacent to the upstream side in the upward feeding direction of the watering member above the water receiving part and receives water from the water receiving part. A sea sand desalination device comprising: a water supply device having a water supply unit that supplies water to the sea sand;