JPS60183081A - Sludge treatment and centrifugal separator - Google Patents

Abstract

PURPOSE:To make it possible to easily perform treatment, after gravel is separated, by a small centrifugal separator, by individually performing the separation of gravel, sand and mud from muddy water discharged under construction. CONSTITUTION:Primary treated water obtained by separating at least gravel from muddy water with specific gravity of about 1.3 containing gravel, sand and mud discharged from a site of construction is stored in a water storage tank 12. Next, at least sand is separated from this primary treated water to obtain secondary treated water which is, in turn, stored in a conditioning tank 14. When the specific gravity of this secondary treated water exceeds a necessary specific gravity range, a part thereof is taken out and supplied to a centrifugal separator 54 and the mud in the secondary treated water is accumulated to the peripheral wall of a rotor 60 by the rotation of said rotor 60 and, after said mud is removed, water with low specific gravity is supplied to the conditioning tank 14 where the secondary treated water and water with low specific gravity are mixed by blades rotated by an electromotor 66 to obtain conditioned water with predetermined specific gravity.

Description

[Detailed Description of the Invention] The present invention relates to a muddy water treatment method and a centrifugal separator, and more particularly, the present invention relates to a muddy water treatment method and a centrifugal separator. 119
The present invention relates to a method for treating muddy water discharged into the muddy water and a centrifugal separator for separating solids from the muddy water.

Pressurized shield for muddy water containing bentonite as one component [,
1'1 by method, underground a extension wall] - method, cast-in-place pile method, etc.
If used daily, it will prevent the collapse of the bird and the hole wall.
It can improve efficiency and safety. However, this effect keeps the specific gravity of the muddy water, which changes due to the scraping that occurs as J-Ha progresses, within a predetermined range.

Since this cannot be achieved without maintenance, it is necessary to circulate muddy water during construction to maintain the ratio within the predetermined range If1'.

At 15℃, in order to keep the specific gravity of muddy water within the specified range, 1.
Gravel is separated from the muddy water discharged during the process, and the treated water is poured into a storage tank.The treated water is then led to a centrifugal saturation machine to separate sand and mud from the treated water. Adjusted water el obtained by
``The method is to use muddy water from 11 rivers.

However, the method described above requires a continuous type centrifuge, and since a considerable amount of sand and mud from I1 is mixed into the treated water, the centrifuge must have Icl+ performance and be larger. However, the equipment costs are high.

Accordingly, the purpose of the present invention is to separate gravel, sand, and mud separately, thereby reducing the extensive treatment that was conventionally required after gravel separation, and to separate mud using the Hench method. 4th grade
11 centrifugation method that can use one centrifugal machine, and a centrifuge that can be used to carry out this treatment method.
Our goal is to provide +min #L machines.

The uninvented method is to use muddy water 1:-1 to process the discharged muddy water//: to separate at least gravel from the discharged muddy water and to produce primary treated water. Store it in a storage tank, separate at least sand from the treated water (11 and 26), transfer the treated water to an adjustment tank, and then take out a part of the treated water and remove the sand from the treated water. The mud was separated from the treated water and 11L of low specific gravity water was used as the primary treated water.
To! Together, the muddy water 1.・Is this the conditioned water to be used? 111] = υ' Treated water is used as conditioned water.

I, Hikari 11 again. This is a centrifugal separator that separates 1/11 volume of muddy water, and its axis is placed in the water 11. water-
A casing having an opening at one end in the +z direction and having a function for discharging the liquid from which the solid content has been separated, and a driven rotor disposed within the casing so as to be rotatable around a horizontal axis. and a rotor whose one end is open on the opening side of the casing.

(ii) a scraping means provided on the casing, comprising a scraper rotatably mounted in the rotor; and (ii) a jack for movably supporting the scraper along the axis of the rotor. Twisting a removing means and a chute disposed through the opening of the rotor to discharge the solids scraped by the scraper of the scraping means out of the rotor.

Hereinafter, an example of undeveloped reno will be described with reference to one drawing.

The present invention relates to a method for treating muddy water discharged during construction work using muddy water.

As shown in FIGS. 1 to 3, muddy water having a specific gravity within a predetermined range centered around 1.1 is supplied to a construction site 10, where it is used for construction work. In this case, the muddy water supplied to the construction site 10 at the beginning of construction is muddy water that has been previously formed to have a specific gravity within a predetermined range. Then, the conditioned water obtained according to the present invention, which is not comparable to the progress of 1.1t, is supplied to the site 10 as mud water.

1'II After 111 desecration was used at site 10, road, sand,
4Jl of mud etc. was discharged into the muddy water.
j+reservoir 12 Hey, get it. Here, the meaning of ``flu'' is ``flu''.
Solids content of 2° to 1°, in which case the primary treated water generally contains solids of less than 2 mm. However, due to the +'1 condition of the other mountain of 1° II site 10, 4 from site lO in 1
JI i, Since the content ratio of dirt, sand, mud, etc. in the muddy water differs, in view of the need to effectively separate the dirt from the muddy water, the limit particle of the solid content to be separated from the muddy water is determined. For example, the diameter is 2 mm outside the above 2 mm. '8+am'
, zz is 1.7m111. Separating at least gravel from the muddy water to obtain sub-treated water means that the bulk of the gravel is removed from the muddy water, and the sub-processed water generally contains solids below the critical particle size.

The primary treated water stored in the storage tank 12 is taken out and this -
11.1 At least sand is separated from the secondary treated water and the secondary treated water is stored in the adjustment tank 14. Here, sand and 140.07
Refers to the solid content exceeding 4 mn+, in this case 1°1, knee,
? j: The treated water generally has a solid content of less than 0.074 mm, and the secondary treated water stored in the adjustment tank 14 has a solid content of 0.07 mm.
Contains mud with a solid content of less than 4 mm, and the I content of this mud differs from city to city site, and the ratio of the secondary treated water is 1.
is 1me 1me. However, the specific gravity of the treated water is high.
, 1.15, the predetermined ratio required for muddy water!
Since it slightly exceeds the TI@ range, -18 F of the treated water
Take out the AR17. Separate the mud from the secondary treated water
Obtain specific gravity water. -The mud in the next treatment water contains silt and viscous 1.
The specific gravity of low-density water is approximately 1.05 because one field contains solids with a small particle size and it is impossible to separate all the mud from the water. becomes. This low-ratio small water is combined with the secondary treated water in the adjustment tank 14, and the adjusted water having a specific gravity within a predetermined range is 9'.

When the primary treated water stored in the adjustment tank 14 is within a predetermined specific gravity range, the secondary treated water can be directly used as the adjusted water.

Primary treated water and low ratio wood? When the specific gravity of the adjusted water combined with 17 or the specific gravity of the secondary treated water is smaller than a predetermined range, muddy water with a specific gravity of 17 is added to the adjusted water or the secondary treated water, and 14 to obtain a specific gravity within a predetermined range.

Conversely, -26: When the treated water and low specific gravity water are mixed and the specific gravity of the adjusted water is greater than the range of fil, a part of the adjusted water is taken out and the low specific gravity water is mixed, and the The operation is repeated until a predetermined range iT<range is reached.

This is because there is a large amount of sand to be treated when the secondary treated water is separated from at least four types of sand.

1 (It is preferable to use a 9-body cyclone. In this case, primary treated water and crystallized small water containing separated sand are each discharged from the two outputs 11 of the oil body cyclone. . - Next, adjust the treated water as described above! Go to %4fi14 and store it here. Separate the sand from the crystallized water and add 1
1) The treated water is led to the storage tank 12 and is spooled there, so that there is no waste water other than the water that is absorbed into the sand. The treated water stored in the storage/J tank 12 is then led to the liquid cyclone together with the next treated water, 11)
After the above-mentioned treatment, the water returns to the storage tank 12, and a portion of the next-processed water circulates between the storage tank 12 and the hydrocyclone. As a result, the concentration of sand among the solids contained in the books stored in the storage tank 12 is gradually reduced.

In the example shown in the small figure, 1 small site 10 is h'vq, 1 using the muddy water pressure shield 1 method. Mud water addition) L shield machine 16
has a cutter 18 and a partition wall 20 provided at a distance 19 from the cutter 18, and has a muddy water supply within the distance 19. Continuously supply 1 volume of muddy water through 622, and then continuously supply 4JL of muddy water through 24 to 1/1 of 11 water.
The pressure of the muddy water within the interval 19 causes the jino feathers 26 to
Maintain pressure to prevent collapse of 93 wings 26 11. While doing so,
The mud water pressurization shield machine 16 excavates.

The muddy water containing gravel, sand, mud, etc. discharged by the pump 25 through the muddy water t and II outlet pipe 24 is guided to a vibrating sieve 28 disposed at the 1st side of the storage tank 12. In the illustrated example, the vibrating sieve 28 is a screen 3 of L stage with 0.0 to 4 mw sieve mesh.
0 and one stage of 2 mm sieve 1'' screen 32, and is driven by an electric motor 34.
As a result, both screens 30,32 are subjected to a force of 114A\.

A foot honks 38 is placed on the person 11 of the screen 32 on the F stage of the vibrating sieve 28. +1 exit pipe 2
The muddy water discharged from 4 to 471 passes through the foothonx 38 and is supplied to the screen 32 at the top stage of the vibrating sieve 28.

This screen 32 separates gravel from muddy water, and the resulting
The next treated water is stored in the storage tank 12 A1, and the gravel is stored in the shoe 133.
It is released from the air.

The next treatment water in the storage tank 12 is pumped by pumps 40 and 1 (k6
'i'i' 42 and then supplied to the t(y body) cyclone 44.In the tt cyclone body cyclone 44, the next treated water does not revolve around the concave part 45 of the hydrocyclone, and then flows to the small diameter side.
As it moves toward the right in FIG. 2, it is gradually accelerated and subjected to a gradually larger centrifugal force, and the sand is collected near the wall of the ring section 45.

Then, at the straight turn where the primary treated water reaches the outlet 1146, the secondary treated water separated from the secondary treated water (11) is reversed and proceeds toward the left through the l'1911 part 45, and the output I.J.
From 47? Enter 648. ? The output [-1 of i48 is connected to the adjustment tank 14.

The sand and high specific gravity water extracted from the liquid cyclone output 1146 are supplied to the first stage screen 30 of the vibrating sieve 28, where the sand is dehydrated and separated, and the treated water is
The sand falls through the stage screen 32 into the storage tank 12 and is stored there, and is discharged from the chute 31.

Measures the general use of the primary treated water stored in the adjustment tank 14) 1"1
7. When the specific gravity exceeds a predetermined range, a part of the secondary treated water is sent to the outside of the centrifuge via the pump 50 and the supply pipe 52.
Sarel supplied to A54. Centrifugal outside a 4'! , 54 A casing 56 whose axis is vertically arranged, and this casing 56
/A rotor 60 is disposed within the blowfish 56 and fixed to the vertical shaft 58, and the rotor 60 is rotated by an electric motor 62. As the rotor 60 rotates: mud in the primary treatment water is deposited on the peripheral wall of the rotor, and low specific gravity water from which this mud has been separated is supplied from the discharge pipe 64 to the adjustment tank 14.
Then, the secondary treated water and low specific gravity water are combined by a blade 68 rotated by an electric motor 66, and a predetermined tonne of regulated water is produced.

111 on rotor 60 of IJ '11 flJ machine 54
If the accumulated mud reaches a thickness of V).')j-, the capacity of the rotor will be reduced by 1, so there is no need to worry about removing this mud from the rotor 60. In the example of Tamizu, the shear and the buff 2, which is driven by the gear 0, are arranged in the rotor 60, and a shutter 74 is installed at the bottom of the casing 56. Open the shutter 74 and set the scraper 72 to 1.
．． When moving to the board, the scraper 72 removes the tIIVs.
The mud is transferred to conveyor 761. The mud is discharged by this conoveyor 76.

If the specific gravity of the conditioned water or secondary treated water is 1. “Range 1・
In order to make the specific weight more appealing when , or 1.
- In order to obtain muddy water at the beginning of II, a mixer 78 that supplies a certain amount of general-purpose muddy water to the regulating tank 14 is connected to 1. attached to the side. Mixer 78 is Cane Fugu 80 and 4
and a mixing blade 82, and the mixing blade 82 has an iL motive 84.
rotated by This mixer 78 mixes the hennite and other substances with the water. Water supply Ii to the adjustment tank 14
'i86 is connected.

The regulated water obtained in the above-mentioned operation A'1 passes through the pump 88 and muddy water supply 't', '22 to the muddy water pressurizing shield machine 1.
6.

The centrifugal separator 100 shown in FIG. 41 and FIG.
, U When used in place of the separator 54, it has been improved to provide even better performance to the user 11.

Centrifugation #1. The machine ioo has a casing 102 and a row 1
04, scraping f, sinking 106, and chute ios.

The entire casing 102 is formed into a cylindrical shape, and its axis is arranged horizontally, with an opening 10 at the end facing the water 1.
It has 3. The casing 102 is equipped with a t611 O at the lower center end for discharging 4 Jl of a low specific gravity liquid obtained by centrifuging the solid content. This casing 102 is open 1-J I
It is cantilevered by a stand 112 on the opposite side of O3, and the stand 112 is supported by a plurality of loose fittings H'i 116 consisting of springs 1i3 and stoppers 114.
It is attached to 8. The pen 1118 is the adjustment tank 14
Fixed to Amano 1.

Center and stun + of casing 102: l t 2
Through the Vl, 120 pieces of Ice III are placed. This water body 120 is rotatably supported by bearings 122 mounted on stands 1121m and 7v at intervals in the horizontal direction, and the end of the force is
A V sheave 124 is fixed to the X with a key 125. 1 of stand 112. The upper movement Rl 26 is cut in the mountain part, and this 1 (fixed to the shaft of the motive 126 with the key 127) is connected to the V sheave 128 and the V sheave 124 of the water 1 shaft. In between, V bell) 130 or more was lost. Between the water "l' + h l 20 and the stand 112 there is a sealing structure I' known for this type of centrifugal machine. 1.
4), it is considered to be liquid electric.

The rotor 104 has a large number of through holes in a peripheral wall 132 and is formed into a cylindrical shape as a whole.

The rotor 104 is disposed within the Goosong 102 so that its axis is horizontal.
Open I + 103 side: + 133, Nometa,
Insert the host 134 on the j side. -Horizontal Ii to Hoth 134
:h 120 are fitted in an electrostatic state, and the boss 134 is fixed to the horizontal shaft 120 with a key 135. this? +'
As a result, the rotor 104 is supported by water i1211qi r 20 and has the ability to rotate i1.

(The first stage 106 for taking control is equipped with a scraper 136 and 1, 1, 1, and 138. The scraper 136 is formed in a plate shape in the example of the I/L board, and
Welded to the tip of 40 fff, min. Sktopa 1
At the outer peripheral end of 36, cemented carbide and other 1I3L! A chip 137 made of a metal material is fixed to it.
A support member 146 having a cylinder 144 for rotation, and a cross section of the water 11 formed in a U-shape is installed q11. One J4'l 47 of the support member 146 is welded near the opening 103 of the gauging 102, and a force strip 148 is spaced horizontally from the strip 147. The six pieces have a hole 149 that extends in the water'+i direction and is opened so that the line 4111 or the axis of the rotor 104 is 'P f'i, and the Bunnyu 150 is fitted into this hole, and the Bunnyu 150 is fitted with a cylinder. The portion 4A' 152 is rotatably supported.

The 1'l cylinder member 152 has a keyway 153 extending in the axial direction and a sector tooth Ilj formed in an arc shape centered on the axis.
l 54 and i1. This circle t+J member 152 has an opening.
, I.140 is penetrated. Mouth, IQ l 40
The key is 156 or 1-11 stones, and this key 156
is inserted into the keyway 153 of the circle 1, 1 member 152.

It is connected with a helical key. As a result, the mouth 1.140 is supported by J1 rotation with respect to the cylindrical member 152, and is capable of moving in the direction of its axis.

ill iJ4 river cylinder 142 is casing 102
Jj41. It is supported and extends in 11 lines with the axis of the rotor, and a support plate 160 is attached to the piston ront 158.
Jil)i,' has been done. The support plate 160 has a mouth, 1ζ
140 is supported rotatably and immovably in the axial direction.

The rotating cylinder 144 is located between Φ of the support member 146)
t l Jl) 1 is supported by 62 and cylinder 1 is used for advancing and retracting.
．． 42, and a rank 164 is attached to the piston ron F'l 63. This rank 16'4 meshes with the sector gear 154 of the cylindrical member.

The soyute 108 is operated by H in order to discharge the solid content scraped by the scraper 136 to the outside of the rotor 104.
I get kicked. The chute 108 is fixed to the casing 102 or 1:' it s.

When the rotor 104 is rotated and the 124' treated water is supplied to the rotor 104 via the supply 1652, the mud 170 is separated, and the low specific gravity water is supplied to the adjustment tank through the 'i<"y l O of the casing 102. When the mud accumulated on the rotor 104 reaches the limit 74+r, the supply of primary treated water is stopped at 11, and while the rotor 104 is rotating, the jack 10
The cylinder 144 for rotation 6 is moved 1'I to swing the scraper 136. At the same time, the cylinder 142 for advancing and retracting is operated to move the scraper 136 in the axial direction of the rotor 104, scraping off the mud 170 accumulated on the rotor 104 and throwing it into the shoe L I '081 to be discharged to the outside.

In Fig. 6, the first stage of scraping 172 is the scraper 17.
This example is similar to the above example in that it includes 4, 176, and 176. However, the scraper 174 in this example is a free roller and the jack 176 is made of a shilling. A support 11 end 178 is connected to the cylinder screw 178, and a free roller 174 serving as a scraper is rotatably supported at the tip of the support rod 178. The free roller 174 has a cutting edge 180 on its outer periphery, and has a plurality of reliefs i', 'd l Rl wo 4t 6 ゜ 7 shells 176 at intervals in the circumferential direction as shown in FIG. 182 is taken up by the bracket 184, and following this bracket 184, the piston 70 is reached.
7 F' 1 B 3 extends in the direction of the axis JJ of the rotor 10.4. Bladder y l・l 84 is casing 1
02 is fixed to the cylinder 188 piston ron) and 189 which are picked up via the bladder y l and l 86, and the jaw 182 is supported so as to be movable in the radial direction of the rotor 104. . As a result of this spring 11, the free roller 174, which is a scraper, is movable in the axial direction and radial direction of the rotor l'04.

When the hl of mud 170 accumulated on the rotor 104 reaches its limit, while rotating the rotor 104, the free roller 174, which had been advanced far from the peripheral wall, is moved closer to the peripheral wall by operating the sill 18B, and at the same time Activate jack 172. When the free roller 174 comes into contact with the mud 170, the free roller starts rotating and moves toward the mud 170 while moving in the axial direction.
scrape off. According to the scraping "1st stage 172 in this example,
No torsional force is applied to the support shaft 178, etc., and the free roller 174 is in contact with the peripheral wall of the rotor 104.
Since it can be used in a loaf, you can reliably scrape off mud in just 1 minute.

According to the treatment method of the present invention, the gravel contained in the muddy water extracted during the treatment is separated and folded, the next-treated water is stored in a retention tank (11'), and the sand is separated from the next-treated water. The 2nd and 6th stage treated water obtained from the process is stored in a regulating tank and mud is separated from the secondary treated water as appropriate, so there is no need for people and other processing equipment like in the past to store the gravel. .

In addition, since there is no sand in the primary treatment water and it takes 1 minute to separate the mud from the treated water, the centrifugal machine used to separate the mud is small. However, since the low specific gravity water obtained by centrifugation is moored in the adjustment tank, the fA core Is machine is a batch type machine. can.

According to the To-O't'j 74 aircraft of the present invention, it is easy to scrape off mud accumulated on the rotor, and there is no need to provide a casing or the like, resulting in a simple structure.

[Brief explanation of drawings]

Figure 1 is a longitudinal cross-sectional view showing the equipment for carrying out the unreleased 1!11 method, Figure 2 is a cross-sectional view, Figure 3 is a plan view, Figure 4 is an IE view of the centrifuge #5, The figure is a longitudinal sectional view, No. 614 is a side view of the first stage of drawing, and FIG. 7 is an 11-plane view of the scraper shown in FIG. i6. 1.0: l: small site, 12: storage tank. 14: Adjustment tank, 16: Mud water pressurization shield machine, 22; Mud water supply! li'i? t+, 24; muddy water discharge pipe. 28: Vibrating sieve, 44: Liquid cyclone. 54; 'Jj-ShivunllI Machine, 78.1oo: Mixer, 102: Cage 7g, 104; o-Evening. 106.172: 1 stage of scraping. 1' 36.174: Scraper, 138.176, Ja, 7 gi.

Claims (8)

[Claims] (1) A method of treating muddy water discharged during 1, 4A4 using muddy water, in which at least 2 pieces of water are separated from the muddy water discharged from the IJ1 and the primary treated water is stored.
Separate at least sand from the secondary treated water in the /I tank, store the secondary treated water in the adjustment tank, and then
A part of the secondary treated water is taken out, mud is separated from the secondary treated water, and 11 tons of low-ratio small water is mixed with the secondary treated water and 4'1
Seat 1. Then, use the JA tidying wood to be used for the muddy water 1 and 1-, or use the secondary treated water as it is as the adjusted water. Mud water processing capacity for 1 person. (2) When the specific gravity of the regulated water or primary treated water is smaller than a predetermined range, muddy water of a certain specific gravity is added to and mixed with the A regulated water or primary treated water in the +iiij adjustment tank. Special 1
; 1 Claim No. (1) The muddy water treatment power as set forth in item (1);
. (3) Direct primary treated water to the liquid cyclone. 4'f'W The method for treating muddy water according to claim 1, wherein sand is separated from the secondary treated water to obtain +iii 7th secondary treated water. (4) The treated water obtained by separating the sand from the high specific gravity ice discharged from the hydrocyclone is returned to +iQ storage tank (111 tank). The muddy water treatment method described in section 3). (5) The secondary treated water is led to a centrifuge to separate mud from the secondary treated water to obtain the low ratio river water. 111. A muddy water treatment method according to claim (1). (6) A centrifugal separator for separating solids from muddy water, the casing being arranged horizontally on the axis and having an open end facing the water, the solids being 1; A casing having a tube for initially discharging liquid; 1. ; a driven rotor disposed in a casing so as to rotate about a horizontal axis, and one end of which is opened on the opening 11 side of the casing; and a scraper provided on the casing. a scraping means for scraping a scraper rotatably disposed within the rotor and a jack for supporting the scraper in a movable manner along the axis of the rotor; and the scraping means. a chute disposed through an opening IJ of the rotor to discharge the solid content scraped by the scraper to the outside of the rotor. (7) The scraper is a free roller rotatably attached to the tip of the jack, and the jack is provided in the casing to move the jack in the radial direction of the rotor. The centrifugal separator according to claim (6)rr+, wherein the operating 'f' is supported on a stage. (8) The scraper is fixed to the i-end of the jack, and the jack is parallel to the axis of the rotor. The centrifugal separation machine according to Claim No. (if) JJi, which is capable of rotating around an axis of r.