JP2909585B1 - Mud treatment equipment - Google Patents

Abstract

Abstract: PROBLEM TO BE SOLVED: To automatically treat a muddy water by solid-liquid separation, and that the separated solid matter does not easily melt and flow out even if it contains water. Therefore, the solid matter is discharged to a disposal place. Provided is a muddy water treatment apparatus that does not melt and flow out to make transportation difficult and does not pollute the surrounding environment even if it is left outdoors and rains, etc., until transportation. SOLUTION: In a muddy water treatment apparatus 1 in which a coagulant is mixed into muddy water to form a solid matter of a mud, that is, a floc, solid-liquid separation and treatment are performed.
It comprises a solid-liquid separation drum 4 for separating the floc and water, and a stone powder mixing drum 5 for mixing the floc and stone powder.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for treating waste mud, and more particularly to an apparatus for treating mud, which prevents solids of mud taken out after treatment from being melted out even if it contains water again due to rain or the like. .

[0002]

2. Description of the Related Art In the production of crushed sand used as aggregate for concrete, crushed sand obtained by appropriately crushing raw sand such as gravel and crushed stone is washed with water, and then the crushed sand is taken out. In this step, a large amount of muddy water remains in the water tank after removing the crushed sand. The mud generated in this way must be disposed of in an appropriate place, but considering the impact on the surrounding environment, it is difficult to find a suitable disposal place. Must be transported by truck or the like, and the transportation cost becomes enormous. Therefore, if such muddy water is separated into solids and water, and the water is taken out and reused, and only the solids are transported, the cost required for the disposal of the muddy water can be reduced.

[0003] Such a treatment of muddy water is conventionally performed by the following method. For example, the muddy water treatment apparatus disclosed in Japanese Patent Application Laid-Open No. 56-62510 is constituted by connecting two rotating drum-type separators and a dehydrator in a straight line. The muddy water is supplied from the start end of the first separator to the inside thereof, and a coagulant is supplied to each of the separators and the dehydrator, and the solid is precipitated while moving the muddy water according to the rotation of the drum, and the process of the transfer is performed. In the above method, water is gradually discharged through a drain hole or the like to separate and process solids.

Further, the muddy water treatment method disclosed in Japanese Patent Application Laid-Open No. 50-85137 discloses a method of mixing muddy water and a flocculant in a mixing cylinder and then stirring the mixture in a stirring cylinder to promote coagulation and separation. The solid-liquid separation is performed on a rotating screen composed of a cylindrical net or the like, and the solid matter having a low water content is separated and treated by pressure dehydration with a circular roller.

Further, the waste mud treatment apparatus disclosed in Japanese Patent Publication No. 58-1640 discloses a method of mixing a waste coagulant with a coagulant in a coagulation reaction tank, and allowing the muddy water to stand for a while in a sludge stock tank. Then, a certain amount of sludge is supplied to the pressing device by a sludge quantitative feeder provided at the lower part of the sludge stock tank, and the sludge is pressurized and dewatered in a pressing device including a mesh conveyor and a pressing belt. Thus, a solid having a low water content is separated and treated.

[0006]

However, according to the above-described muddy water treatment apparatus and muddy water treatment method, the following problems occur. In other words, solid matter separated from muddy water is only dehydrated by pressurization etc., so if it is left outdoors until it is transported to a disposal place, it will melt again if it contains water due to rain etc. It flows and becomes difficult to transport, pollutes the surrounding environment and causes pollution problems. Therefore, countermeasures such as hardening with a solidifying agent are conceivable, but there is a problem that it takes time and effort.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is intended that muddy water is automatically solid-liquid separated and treated, and the separated solid matter is easily dissolved and flows out even if it contains moisture. Therefore, even if the solid matter is left outdoors and rains, etc., until it is transported to the disposal place, it melts and flows out, making transport difficult or polluting the surrounding environment. It is an object of the present invention to provide a muddy water treatment apparatus that does not need to be used.

[0008]

Means for solving the above problems are as follows. That is, the muddy water treatment apparatus according to claim 1 mixes a flocculant into the muddy water to form a floc which is a solid substance of the mud,
In a muddy water treatment apparatus that performs solid-liquid separation and treatment, a stirring tank that injects and mixes a flocculant into the muddy water to be treated,
A cylinder for generating a water and floc by further promoting a flocculation reaction between a mixed liquid obtained by stirring and mixing muddy water and a flocculant discharged from the stirring tank from one end side to discharging from a second end side. An agglomeration drum that is a shaped drum; a cylindrical mesh drum that is a separation screen that separates water and floc generated while passing through the agglomeration drum; and a predetermined interval on the outer peripheral side of the mesh drum. A solid-liquid separation drum having a double structure comprising a cylindrical outer drum for collecting and discharging water that has passed through the mesh drum, and a floc separated by the solid-liquid separation drum from one end side thereof. A cylindrical outer drum for injecting into and discharging from the other end side,
A stone powder mixing drum having a double structure comprising a cylindrical mesh drum comprising a sorting screen which is placed inside the outer drum and sifted separately supplied stone powder and supplied onto the injected flocks, and the agglomeration drum And a driving device for rotating the solid-liquid separation drum and the stone powder mixing drum.

In a second aspect of the present invention, there is provided a muddy water treatment apparatus according to the first aspect, wherein a cylindrical drum having an agitating chamber therein, a driving device for rotating the cylindrical drum, and a cylindrical drum. Stone powder having a supply port for supplying a rough, and a pressing body housed in the cylindrical drum, and manufacturing the stone powder by rotating the cylindrical drum and gradually grinding the rough inside with the pressing body. The manufacturing apparatus is characterized in that the stone powder to be supplied to the mesh drum of the stone powder mixing drum is manufactured.

[0010] The muddy water treatment apparatus according to a third aspect of the present invention is the muddy water treatment apparatus according to the second aspect, further comprising a blower, wherein a blow port of the blower is connected to a supply port for supplying rough stone to a cylindrical drum of the stone powder manufacturing apparatus. It is characterized in that it is provided toward the inside of the cylindrical drum, air is sent from the blower port toward the inside of the cylindrical drum, the air flow from the stone powder production device side to the flocculation drum side in the muddy water treatment device It is characterized by making.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A muddy water treatment apparatus 1 according to an embodiment of the present invention will be described below with reference to FIGS. First, the entire configuration of the muddy water treatment apparatus 1 according to the embodiment of the present invention will be described with reference to FIGS. 1, 2 and 3 along with the process of treating the muddy water 7 to be treated.

A muddy water treatment apparatus 1 according to an embodiment of the present invention.
As shown in FIG. 1, the apparatus comprises a stirring tank 2, an aggregation drum 3, a solid-liquid separation drum 4, a stone powder mixing drum 5 and a stone powder production device 6. As shown in FIG. 2, muddy water 7 to be treated, which is generated when crushed sand or the like is washed, first enters the stirring tank 2 and is stirred and mixed with the coagulant 8 injected therein. Next, the floc 10 is injected into the flocculation drum 3, and the flocculation reaction is promoted in the flocculation drum 3.
Are generated. Next, the water 9 and the floc 10 are sent into a mesh drum 11 composed of a separation screen of the solid-liquid separating drum 4 to separate the water 9 and the floc 10. Outer drum 12
Is collected and discharged. Next, as shown in FIG. 3, the floc 10 sent to the stone powder mixing drum 5 is injected into the outer drum 13, and the stone powder 14 separately supplied is injected into the mesh drum 15 comprising a separation screen, and the mesh drum And supplied to the outer drum 13 by rotation of the outer drum 13.
0 and the stone powder 14 adheres to the surface almost uniformly. Here, the stone powder 1 supplied to the stone powder mixing drum 5
4 is automatically manufactured and supplied in a required amount by the stone powder manufacturing apparatus 6.

The aggregating drum 3, the solid-liquid separating drum 4, the stone powder mixing drum 5, and the stone powder producing device 6 are each provided with a driving device 16 for rotating the drum. In the present embodiment, as shown in FIGS. 4 and 5, a motor 18 installed on the side or below the drum main body 17,
A drive gear 19 fixed to the rotating shaft of the motor 18
And a driven gear 20 fixed to the outer peripheral wall of the drum body 17.
And a chain 21 wound around the driving gear 19 and the driven gear 20, and four support rollers 22 for rotatably supporting the drum body 17. The rotational force of the motor 18 is transmitted to the drum main body 17 via the chain 21 so that the drum main body 17 is driven to rotate above the four support rollers 22. The gears 19 and 20 are provided with toothed pulleys or V-shaped pulleys.
The chain 21 may be formed by a timing belt or a V-belt. Further, the drive device 16 is not limited to the configuration shown in the present embodiment, and it is possible to improve the other configurations by appropriately changing the design.

Next, each component will be described in detail with reference to FIGS. As shown in FIG.
Is provided with a stirring screw 24 as a stirring device for stirring the muddy water 7 and the flocculant 8, and a motor 25 for rotating the screw. A muddy water inlet 26 and a flocculant tank 27 are provided at the upper side, and open / close valves 28 and 29 for injecting appropriate amounts of the muddy water 7 and the flocculant 8 into the stirring tank 2 respectively.
Is provided. In addition, a discharge port 30 for discharging the mixed liquid 23 of the muddy water 7 and the flocculant 8 after stirring to the flocculation drum 3 is provided at a side portion of the stirring tank 2.
The muddy water 7 generated when washing the crushed sand or the like enters the stirring tank 2 through the muddy water inlet 26 and the stirring screw 2
After being agitated and mixed with the coagulant 8 injected from the coagulant tank 27 by the coagulant 4, the coagulant is discharged from the outlet 30 to the coagulation drum 3.

As shown in FIG. 2, the coagulation drum 3 has the above-described driving device 16 and is a rotating cylindrical drum. The inner wall is formed smoothly without unevenness. The rotation speed can be set to an arbitrary speed by an inverter or the like, and is set to the optimum speed in consideration of the ratio of water in the muddy water, the composition of the mud, and the like. The mixed liquid 23 injected from the stirring tank 2 to one end of the coagulation drum 3 promotes the coagulation reaction while moving inside the coagulation drum 3 and water 9
And floc 10 which is a solid matter of mud are generated. The water 9 and the floc 10 are pushed out by the mixed liquid 23 coming from the stirring tank 2 and discharged to the solid-liquid separation drum 3 from the other end.

As shown in FIG. 2, the solid-liquid separation drum 4 is
A cylindrical mesh drum 11 having a driving device 16 as described above and comprising a separating screen for separating water 9 and flocs 10 generated while passing through the flocculating drum 3;
A cylindrical drum having a double structure comprising an outer drum 12 which is a cylindrical drum which is disposed at a predetermined interval on the outer peripheral side of the mesh drum 11 and collects and discharges water passing through the mesh drum 11. is there. The outer drum 12 has a larger diameter than the mesh drum 11, and is arranged at predetermined intervals so as to surround the entire outer periphery. The mesh drum 11 is formed of a cylindrical separating screen, and the mesh size of the screen needs to allow only the water 9 to pass without passing through the flocks 10.
Specifically, it is appropriate that the size of one side of the mesh is 2 to 4 mm. The mesh drum 11 may be formed of a perforated plate having a large number of pores. Even in such a case, it is appropriate that the diameter of the pores is 2 to 4 mm.

On the inner peripheral surface of the mesh drum 11,
A spiral feed plate 45 having a constant width in the diameter direction is fixedly provided. The spiral feed plate 45 is connected to the mesh drum 11.
Is provided in such a direction that the mixture of the floc 10 and water 9 is moved toward the stone powder mixing drum 5 by the rotation of. Therefore, the mesh drum 11 is
While the mixture of water and water 9 is sent at a constant speed, only the water 9 is passed through and taken out, and the floc 10 is separated. Then, the separated flocks 10 are discharged to the stone powder mixing drum 5. On the other hand, the water 9 passing through the mesh drum 11
Is collected by the outer drum 12 and flows downward from the floc inlet side opening 32. Therefore, if the drain pipe 33 is provided below the floc inlet side opening 32, the collected water 9 can be easily drained. The water 9 discharged in this manner can be reused for washing crushed sand and the like.

The inner peripheral surface of the outer drum 12 has
A spiral feed plate 51 having a constant width in the diameter direction is fixedly provided. The spiral feed plate 51 has a mesh that is slightly smaller than the mesh of the separation screen of the mesh drum 11, and allows the water 9 to pass through, but does not allow the flocks 10 to pass. Therefore, even if there is a small floc 10 that has passed through the mesh drum 11 together with the water 9, it is sent to the stone powder mixing drum 5 side by the rotation of the outer drum 12 by the feed plate 51. Does not flow out from the flock injection opening 32. The floc 10 thus sent to the stone powder mixing drum 5 side
As shown in FIG. 2 and FIG. 6 which is a cross-sectional view taken along the line AA of FIG. 2, the scraping plate 31 provided at the end of the outer drum 12 on the side of the stone powder mixing drum 5 follows the rotation of the outer drum 12. After being scraped, the scraping plate 31 is returned into the mesh drum 11 from an opening 34 provided at a connection portion between the mesh drum 11 and the end of the mesh drum 11, and is returned to the stone powder mixing drum 5. Is discharged. The scraping plate 31 has the same mesh as the feed plate 51 in order to allow the water 9 to pass therethrough and to scrape only the flocks 10.

As shown in FIG. 3, the stone powder mixing drum 5
An outer drum 13 which is a cylindrical drum having the driving device 16 as described above, injecting the floc 10 separated by the solid-liquid separation drum 4 into the inside from one end side, and discharging the floc 10 from the other end side; This is a cylindrical drum having a double structure including a cylindrical mesh drum 15 formed of a sorting screen which is disposed inside the outer drum 13 and sieved from the separately supplied stone powder 14 and supplied onto the flocks 10. The outer drum 13 has a larger diameter than the mesh drum 15 and is arranged at predetermined intervals so as to surround the entire outer periphery thereof.

The flocs 10 separated in the solid-liquid separation drum 4 are injected into the outer drum 13 and
The stone powder 1 manufactured in the stone powder manufacturing apparatus 6 described below.
4 is injected into the mesh drum 15 from the stone powder manufacturing apparatus side 47. Here, a spiral feed plate 46 having a fixed width is fixed to the inner peripheral surface of the mesh drum 15, and the spiral feed plate 46 is configured to rotate the stone powder 14 by rotation of the mesh drum 15. Is moved in a direction such that it moves to the solid-liquid separation drum side 49, so that the injected stone powder 14 is sieved while being moved at a constant speed and is supplied to the outer drum 13. A spiral feed plate 52 having a similar constant width is fixed on the inner peripheral surface of the outer drum 13 in a direction opposite to the feed plate 46.
Therefore, the supplied stone powder 14 and the floc 10
Are mixed while moving to the stone powder manufacturing device 6 side by the rotation of the outer drum 13, and are uniformly attached so that the stone powder 14 covers the surface of the floc 10. As a result, a layer of the stone powder 14 is formed on the entire surface of the floc 10, and fine particles of mud do not appear on the surface, so that they are not easily melted even by moisture such as rain.

In the cylindrical mesh drum 15 composed of a sorting screen, it is preferable that the size of the mesh of the screen is divided into several stages along the traveling direction of the stone powder 14 so as to be different. In the present embodiment, the mesh is formed in three stages. In this case, the size of the mesh is 1 to 2 mm on one side of the mesh on the stone powder manufacturing device side 47, and It is appropriate that the size of one side is 2-3 mm, and the size of one side of the mesh on the solid-liquid separation drum side 49 is 3-5 mm, but it is not limited thereto. The mesh drum 1
5 may be formed by a perforated plate or the like having many pores.

As described above, the mesh size of the screen of the mesh drum 15 is formed in three stages, and the mesh size is formed so as to gradually increase. The stone powder 14 having a small particle diameter is supplied to the outer drum 13, and the stone powder 14 having a large particle diameter is gradually reduced toward the solid-liquid separation drum side 49.
3 will be supplied. What has reached the solid-liquid separation drum side end 50 without passing through even the largest mesh, drops from there, and is supplied to the outer drum 13. Accordingly, the floc 10 is first mixed with the large particle size powder 14 and then gradually reduced in size.
As a result, the surface of the floc 10 is first covered with the stone powder 14 having a large particle diameter, and the stone powder 14 having a small particle diameter adheres so as to fill the gaps between the stone powders 14 having a large particle diameter. By doing so, a layer of the strong stone powder 14 can be formed and the surface of the floc 10 can be surely covered, so that the floc 10 cannot be easily melted. The floc 10 thus treated is discharged from the floc discharge side opening 36 of the outer drum 13.

As shown in FIG. 3, the stone powder producing apparatus 6 includes the stone powder 14 for adhering to the surface of the floc 10.
Is an apparatus for automatically manufacturing only a required amount of In the present embodiment, a method of manufacturing a medium stone used for the production of crushed sand for concrete disclosed in Japanese Patent Publication No. 6-71562 and Japanese Patent Publication No. 7-75674 or Japanese Patent Publication No. 7-75675 already disclosed by the present applicant. Can be used with slight modification. That is, as shown in FIG. 3, a cylindrical drum 37 having an agitating chamber inside, a driving device 16 for driving the cylindrical drum 37 to rotate, and an ore 3
8 is provided in the stone powder manufacturing apparatus 6 having a supply port 40, a pressing body 41 housed in the cylindrical drum 37, and an outlet 42 for discharging the stone powder 14 manufactured in the cylindrical drum 37. Then, the cylindrical drum 37 is rotated and the raw stone 38 is gradually ground inside by the pressing body 41 to produce the stone powder 14.

Here, if an iron ball is used as the pressing member 41, the stone powder 14 can be manufactured more quickly, and the pressing member 41 itself is less worn, which is suitable. The size of the iron ball is preferably 60 to 120 mm in diameter. The ore 38 supplied to the cylindrical drum 37
Are stored in the hopper 43 and supplied to the above-mentioned stone powder production device 6 using the feeder 44 in a necessary amount when necessary. Then, the stone powder 14 produced in the stone powder production device 6 is discharged to the stone powder mixing drum 5 after passing through the discharge port 42 formed of a mesh provided at the discharge side end. It is appropriate that the size of the mesh of the outlet 42 is about 8 to 15 mm on one side.

As shown in FIG. 3, a blow port 39 of a blower 53 is provided in the supply port 40 toward the inside of the cylindrical drum 37, and air is blown into the muddy water treatment apparatus 1 therefrom. Thereby, an air flow 54 from the stone powder production device 6 side to the coagulation drum 3 side is created in the muddy water treatment device 1. The dust 55 generated when the stone powder 14 is manufactured in the stone powder manufacturing device 6 is carried to the solid-liquid separation drum 4 by the flow of air 54 and adheres to the inside of the mesh drum 11. The adhering dust 55 adheres to the surface of the floc 10 and is sent to a subsequent step to be processed. At that time, dust 55
Is attached to the inside of the mesh drum 11, so that the flocks 10 can be prevented from sticking to the mesh drum 11.

Most of the dust 55 is treated in the solid-liquid separation drum 4 as described above, but the untreated dust 5
5 is conveyed to the aggregation drum 3. However, at this time, the flow of air 54 has already been considerably weakened, and the small amount of dust 55 that has not been treated falls into the agglomerated drum 3 and
It dissolves in the mixed liquid 23 of the muddy water and the flocculant and is processed together. Therefore, the dust 55 generated in the stone powder manufacturing device 6 does not leak to the outside of the muddy water treatment device 1,
It does not pollute the surrounding air.

[0027]

The present invention is configured as described above and has the following effects. That is, according to the muddy water treatment apparatus of claim 1, the muddy water is automatically separated into solid and liquid to take out the floc, which is a solid matter of the mud, and further, the stone powder is adhered to the surface of the taken out floc to cover it. As a result, a layer of stone powder is formed on the entire surface, so that fine particles of the mud of the flock do not appear on the surface. For this reason, even if it does not solidify with a solidifying agent or the like, it does not easily melt out by moisture such as rain. Therefore, even if the floc is left outdoors and it rains until it is transported to the disposal site, it will melt and flow out, making transport difficult,
The surrounding environment is not polluted, and even after being disposed of at a disposal site, it naturally weathers and returns to the soil, so that the surrounding environment is hardly affected. Further, the water separated from the muddy water can be reused for washing crushed sand and the like since the polluting components have been removed.

According to the second aspect of the present invention, the stone powder to be injected into the stone powder mixing drum is automatically produced by the stone powder producing apparatus, and the powder having an appropriate particle size is automatically mixed with the floc. Only the required amount can be supplied. Therefore, there is no need to purchase stone powder of an appropriate size from any one, and the labor for supplying the stone powder can be omitted.

According to the third aspect of the present invention, a flow of air is formed in the muddy water treatment apparatus from the stone powder production apparatus side to the agglomeration drum side, and dust generated in the stone powder production apparatus is subjected to the solid-liquid separation. By sending to a drum or a coagulation drum, it can be treated together with muddy water, so that the surrounding air is not polluted. In addition, since the dust adheres to the mesh drum of the solid-liquid separation drum, sticking of the flocks to the mesh drum can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing an embodiment of a muddy water treatment apparatus according to the present invention.

FIG. 2 is a schematic diagram showing a first half of an embodiment of a muddy water treatment apparatus according to the present invention.

FIG. 3 is a schematic diagram showing the latter half of the embodiment of the muddy water treatment apparatus according to the present invention.

FIG. 4 is a front view showing a driving device of the embodiment of the muddy water treatment device according to the present invention.

FIG. 5 is a side view showing a driving device of the embodiment of the muddy water treatment apparatus according to the present invention.

FIG. 6 is a sectional view taken along line AA of FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Muddy water treatment apparatus 2 Stirring tank 3 Coagulation drum 4 Solid-liquid separation drum 5 Stone powder mixing drum 6 Stone powder production equipment 7 Muddy water 8 Coagulant 9 Water 10 Flock 14 Stone powder

Claims (3)

(57) [Claims] 1. A muddy water treatment apparatus that mixes a flocculant into muddy water to form a floc, which is a solid matter of mud, and then separates the solid and liquid for treatment. A stirring tank for stirring and mixing; and a mixed liquid obtained by stirring and mixing the muddy water and the flocculant discharged from the stirring tank into the inside from one end side and further promote the flocculation reaction until the mixed liquid is discharged from the other end side. Drum, which is a cylindrical drum that generates water and floc; cylindrical mesh drum, which is a separation screen that separates water and floc generated while passing through the flocculation drum; and an outer periphery of the mesh drum A solid-liquid separation drum having a double structure comprising a cylindrical outer drum that collects and discharges water that has passed through the mesh drum and is disposed at a predetermined interval on the side, and separated by the solid-liquid separation drum. Flock that It comprises a cylindrical outer drum injected into the inside from the end side and discharged from the other end side, and a sorting screen arranged inside the outer drum and sifting the separately supplied stone powder and supplying it onto the injected flocks. A muddy water treatment apparatus comprising: a stone powder mixing drum having a double structure including a cylindrical mesh drum; and a driving device for rotating the aggregation drum, the solid-liquid separation drum, and the stone powder mixing drum. 2. A cylindrical drum having an agitating chamber therein, a driving device for rotating the cylindrical drum, a supply port for supplying a raw material to the cylindrical drum, and a housing accommodated in the cylindrical drum. A pressurizing body, wherein the stone powder is supplied to a mesh drum of the stone powder mixing drum by a stone powder producing apparatus that manufactures stone powder by rotating the cylindrical drum and gradually grinding the ore stone therein with the pressing body. The muddy water treatment apparatus according to claim 1, wherein: 3. A blower, wherein a blower opening of the blower is provided at a supply opening for supplying rough stones to a cylindrical drum of the stone powder producing apparatus, facing the inside of the cylindrical drum. Item 3. A muddy water treatment apparatus according to Item 2.