JP3650380B2 - Manufacturing method of lightweight solidified material - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present inventionLightweight solidified materialIt relates to a manufacturing method.
[0002]
[Prior art]
  For example, dredged mud generated in dredging works generally has a high water content, and even if it is dumped at the disposal site, it takes many years for the soil to exhibit sufficient strength as the ground. In view of this problem, the present inventor has so far proposed various processing methods for continuously mixing mud with a solidified material in a transport pipe. Specifically, those disclosed in JP-A-59-179197, JP-A-3-77893, JP-A-9-158245, and JP-A-2000-54428 correspond to this. In addition, as a pipe-type mixer (in-pipe mixing apparatus) used for this, the one disclosed in JP-A-2001-79827 has also been proposed.
[0003]
[Problems to be solved by the invention]
  However, the preceding examples have the following problems.
[0004]
  (B) While it is desired to reuse water-containing fluid waste such as dredged mud due to the recent decrease in disposal sites, simply adding a solidifying material as in the preceding example, It lacks functionality and added value, and has been difficult to use in recent advanced civil engineering technologies.
[0005]
  (B) In the preceding example, a continuous solidifying material addition process is performed by a pipe-type mixer. However, the above-described pipe-type mixer has a problem in terms of the stability of the mixing ratio.
[0006]
  (C) In the solidifying material addition treatment as in the preceding example, a powder solidified material such as cement may be added directly to mud or the like, but it is mixed with a liquid such as water in advance to solidify cement milk or the like. It is also possible to produce a material and add it to mud. In particular, in the latter case, it is necessary to continuously supply a large amount of solidified material in order to perform a large amount of treatment such as dredged mud soil treatment.
[0007]
  However, since the solidified material solidifies over time, it is difficult to make a solid, so it is desirable to continuously produce and supply the solidified material on site, and in this case, the powder solidified material and the liquid are continuously combined. Needless to say, it is desirable to let them do.
[0008]
  However, the solidified solidified material and the liquid are continuously joined together because the solidified solidified material easily adheres to the moisture and solidifies, and the solidified material adheres to the passageway and the inner surface of the container and is thereby blocked. It was very difficult because of concern.
[0009]
  (D) When a solidifying material is added to water-containing waste such as mud, the blending affects the solidification characteristics. Therefore, in the previous example, it was proposed to adjust the specific gravity of the mud by adding water. However, water alone cannot cope with a high water content. Therefore, a technique capable of surely adjusting the specific gravity of a hydrated material having a wide water content ratio is desired.
[0010]
  Therefore, a main problem of the present invention is to provide a technique effective for reuse of hydrous fluid waste. Another challenge is the ability to mix in a stable ratioTechnologyIs to provide. Another challenge is to produce homogeneous lightweight soil materials from mud and mud.TechnologyIs to provide. Yet another challenge is to reliably adjust the specific gravity of a wide range of water content.TechnologyIs to provide.
[0011]
[Means for Solving the Problems]
  <Invention of Claim 1>
  Has an upstream supply section and a downstream discharge sectionA mixing pipe, a shaft member that is coaxially supported in the mixing pipe, screw blades and stirring blades arranged in parallel from the upstream side on the outer surface of the shaft member, a rotation driving means for the shaft member, The shaft member is provided with at least one additive supply port provided at a portion corresponding to the stirring blade in the shaft member, and is supplied into the mixing pipeRaw materialIs transferred to the additive supply port side through the screw blades that are rotationally driven, and then the additive is supplied to the flowable raw material from the additive supply port.Raw materialAnd the additive are agitated and mixed by a rotationally driven agitating blade.The first duct type mixer and the secondUsing a pipe-type mixer,
  Fluid raw materials containing moisture and solids to destinationPumpingWhile changing to a lightweight solidified material;
  (A) Adjusting the specific gravity of the fluid raw material by adding or removing moistureShi,
  (B)thisA flowable raw material with adjusted specific gravityThrough this order in the mixing line of the first line type mixer and the mixing line of the second line type mixerContinuouslyPumpingAnd
    (B1)In the process of pumping the inside of the mixing pipe of the first pipe-type mixer, after rectifying by the rotationally driven screw blades, the solidified material is supplied to the rectified fluid raw material from the additive supply port, The agitation raw material and the solidified material are agitated and mixed by a rotationally driven agitating blade,
    (B2)The flowable raw material to which the solidifying material is added is rectified by screw blades that are rotationally driven in the process of pumping the inside of the mixing pipe of the second pipe-type mixer, and then the weight reducing material is supplied from the additive supply port. And stirring and mixing the flowable raw material to which these solidifying materials are added and the lightening material with a stirring blade driven to rotate,
  A method for producing a lightweight solidified material.
[0012]
  (Function and effect)
  According to such a manufacturing method, a fluid raw material (such as mud or mud generated at a construction site) containing moisture and solid content can be made into a light weight solidified material smoothly at the site and in the course of its pipeline transportation. It should be noted that lightweight materials such as bubbles and foam beads are difficult to homogenously mix with high water content fluid materials such as mud, but circulate in narrow and narrow spaces like pipe-type mixers. It was confirmed that if the lightening material is agitated and mixed with the fluid material while rotating and supplying the lightening material from the supply port that rotates with the shaft member, much more uniform mixing than originally expected is possible.
[0013]
  The main feature of the present invention is that it takes into account the pulsation (amount variation with time) of the fluid raw material in the pipe-type mixer apparatus. This is the case when a fluid raw material is supplied by a piston pump or the like. Thus, when a fluid raw material is pressure-fed and supplied with pulsation, if this is mixed with an additive as it is, the mixing ratio cannot be stabilized. The preceding examples do not have this viewpoint at all.
[0014]
  However, in the pipe-type mixer apparatus used in the present invention, the flowable raw material is rectified by screw blades and changed into a substantially continuous flow, and then mixed with the additive. That is, when the material is transferred by the screw blade, even if the material supply amount on the inlet side fluctuates, this fluctuation is canceled out by the quantitative extrusion action of the screw blade and hardly affects the outlet side. The present invention makes use of this to eliminate the pulsation of the fluid raw material. Therefore, in this invention, an additive can be mixed with a fluid raw material at a stable ratio.
[0015]
  In addition, although the point which provides a screw blade | wing has also disclosed also in the above-mentioned prior art example, such a rectification | straightening effect | action is not exhibited only by providing a screw blade | wing. Specific means for exerting the rectifying action of the present invention cannot be generally described because various means can be considered depending on the supply mode of the fluid raw material, but a typical one is described in claim 4 described later. Propose.
[0016]
  <Invention of Claim 2>
A mixing pipe having an upstream supply section and a downstream discharge section, a shaft member coaxially supported in the mixing pipe, screw blades and agitation arranged in parallel from the upstream side on the outer surface of the shaft member A blade, a rotation driving means of the shaft member, and an upstream side additive material supply port and a downstream side additive material supply port which are provided at intervals in the longitudinal direction of the shaft member at a portion corresponding to the stirring blade in the shaft member The flowable raw material supplied into the mixing pipe line is transferred to the additive supply port side through the screw blades that are rotationally driven, and then the additive is supplied to the flowable raw material from the additive supply port. , Using a pipe-type mixer configured to stir and mix these fluid raw materials and additives with a rotationally driven stirring blade,
  A method of changing a flowable raw material containing moisture and solids into a lightweight solidified material while being pumped to a destination;
  (A) Adjusting the specific gravity of the fluid raw material by adding or removing moisture,
  (C) While the fluidity material adjusted in specific gravity is continuously pumped through the mixing pipe of the pipe-type mixer,
    (C1) After rectifying by the rotationally driven screw blade, the solidified material is supplied to the rectified fluid raw material from the upstream additive supply port, and the fluid raw material and the solidified material are rotated by a stirring blade that is rotationally driven. Stirring and mixing
    (C2) Next, the weight reducing material is supplied from the downstream additive supply port to the fluid raw material to which the solidifying material is added, and the fluid raw material to which the solidifying material is added and the weight reducing material are driven to rotate. Mix by stirring,
  A method for producing a lightweight solidified material.
[0017]
  (Function and effect)
  In this manufacturing method, the same effect as that of the first aspect of the invention can be achieved. Also, Since the addition and mixing of the solidifying material and the lightening material can be performed with a single pipe-type mixer, there is an advantage that the system can be made compact.
[0018]
  <Claim3Invention of description>
  Pipeline mixer for adding the solidifying materialofA pressure pump is interposed on the upstream side.Only with source pressureThe flowable raw material adjusted in specific gravity is used as the pipe-type mixer.InAdd and mix each additive while passingThe manufacturing method of the lightweight solidification material of Claim 1 or 2.
[0019]
  (Function and effect)
  in this way,Flowable raw material only with the original pressure of the pumpA very simple and energy-saving system can be configured by passing the stirring and mixing position by the pipe-type mixer. Needless to say, this configuration and advantages,tubeThis is due to the adoption of the principle of the road mixer.
[0020]
  <Invention of Claim 4>
  The light weight according to any one of claims 1 to 3, wherein the stirring and mixing is performed under a condition in which a rectifying amount per unit time by the screw blade is equal to or more than a supply amount per unit time of the fluid raw material. A method for producing a solidified material.
[0021]
  (Function and effect)
  Into the mixing linePumping fluid raw materialsThe amount of rectification by the screw blades (that is, the effect of pulsation on the supply side is sufficiently canceled by the screw)Fluid raw materialSupply amount)Fluid raw materialIs supplied, the excess amount becomes the fluctuation of the mixing ratio. Therefore,This sectionAs statedIt is desirable to carry out stirring and mixing under conditions where the rectifiable amount per unit time by the screw blades is equal to or greater than the supply amount per unit time of the fluid raw material.
[0022]
  <Invention of Claim 5>
  The lightweight solidification according to any one of claims 1 to 4, wherein a boost screw blade is provided on the downstream side of the stirring blade in the shaft member of the pipe-type mixer, and the feeding of the stirring mixture to the downstream discharge portion is promoted. Material manufacturing method.
[0023]
  (Function and effect)
  By providing such a boost screw blade, even if the fluid raw material fed under pressure passes through the screw blade, the stirring mixture is smoothly fed out. In particular, in the case where the downstream pipe line of the mixing section is long and the pipe resistance is large, or when the feeding resistance is intentionally provided as described in claim 9 described later, the provision of such boost screw blades promotes the extrusion pressure. This is preferable because the risk of blockage of the pipeline is reduced.
[0024]
  <Invention of Claim 6>
  A mixing pipe having an upstream supply section and a downstream discharge section, a shaft member coaxially supported in the mixing pipe, screw blades and agitation arranged in parallel from the upstream side on the outer surface of the shaft member A flowable raw material that is provided in a mixing pipe line is provided with a blade, a rotation driving means of a shaft member, and at least one additive supply port provided at a portion corresponding to the stirring blade in the shaft member. After being transferred to the additive supply port side through a screw blade that is rotationally driven, the additive material is supplied to the fluid raw material from the additive material supply port, and the fluid raw material and the additive material are rotationally driven with stirring blades Using the first pipe-type mixer and the second pipe-type mixer configured to be stirred and mixed by
  A method of changing a flowable raw material containing moisture and solids into a lightweight solidified material while being pumped to a destination;
  (A) Adjusting the specific gravity of the fluid raw material by adding or removing moisture,
  (D1) The fluidity material adjusted in specific gravity is supplied in a non-pressure-feed state into the mixing conduit of the first conduit mixer, and the supplied fluidity material is rotated by screw blades that are driven to rotate. The flow rate of the fluid raw material is transferred to the downstream side by an extrusion amount equal to or greater than the supply amount per unit time, and the solidified material is supplied from the additive supply port to the fluid raw material in the transfer process. Stir and mix with a rotating impeller,
  (D2) The fluid raw material to which the solidifying material is added is pumped through the mixing pipe of the second pipe-type mixer by a pump and is rectified by screw blades that are rotationally driven in the pumping process. After that, the lightening material is supplied from the additive supply port, and the flowable raw material and the lightening material added with the solidifying material are stirred and mixed by a stirring blade that is driven to rotate.
  A method for producing a lightweight solidified material.
[0025]
  (Function and effect)
  The present invention relates to the inside of the mixing pipeFluid raw materialIs intended to be supplied in a non-pumped state. For example from material hopperFluid raw materialThis corresponds to the case of cutting out and supplying it into the mixing pipeline. In this case, the amount of extrusion per unit time by screw blades isFluid raw materialSupplied to be less than the supply amount per unit timeFluid raw materialIs sent to the downstream part of the screw blade stably and securely.Fluid raw materials and additivesAnd the mixture cannot be filled, and mixing at a stable ratio is difficult.
  However, according to the invention described in this section,The fluid raw material is transferred to the downstream side by a screw blade that is rotationally driven with an extrusion amount that is greater than the supply amount per unit time of the fluid raw material.And was suppliedFluid raw materialCan be fed stably and reliably to the downstream part of the screw blade,Fluid raw materials and additivesAnd the mixture can be filled, and mixing at a stable ratio becomes possible.
[0026]
  <Invention of Claim 7>
  The fluid material adjusted in specific gravity is stored in a hopper, the fluid material in the hopper is cut out by a quantitative feeder, and supplied to an upstream supply unit of the first pipe-type mixer. 8. A method for producing a lightweight solidified material according to 7.
[0027]
  (Function and effect)
  For mixing pipesFluid raw materialAs a form that is supplied in a non-pumping state,Description in this sectionLike from the hopperFluid raw materialThe form which supplies can also be taken.
[0028]
  <Invention of Claim 8>
  Of the pipe-type mixerIn the part corresponding to the upstream supply part in the shaft memberFluid raw materialProvide a supply portThe manufacturing method of the lightweight solidification material of any one of Claims 1-5 which supplies the said fluid raw material in a mixing pipe line through this supply port.
[0029]
  (Function and effect)
  in this case,Fluid raw materialsThe rotation is supplied as the shaft member rotates. Therefore,Fluid raw materialCan be distributed and supplied into the pipe, so that a sufficient rectifying effect is exhibited even if the rectifying ability of the screw blades is reduced.
[0030]
  <Invention of Claim 9>
  Of the pipe-type mixerMixing lineInPart or all of the downstream side of the stirring bladeThe, Located above the part corresponding to the screw blade and the stirring bladeLet, At least in the downstream part of the screw blade, the flowable raw material,Additives and themMixture ofTheFull chargeThe method for producing a lightweight solidified material according to claim 1, wherein the stirring and mixing are performed.
[0031]
  (Function and effect)
  Do as described in this sectionByIn the pipeline mixerThe feeding resistance of the stirring mixture is increased, and at least the downstream part of the screw blade has a flowable raw material,Additives and themMixture ofTheFull chargeCan beA reliable and sufficient mixing is possible.
[0032]
  <Claim10Invention of description>
  SaidPipe type mixerIn shaft memberAdditivesCover member on the front side in the rotation direction of the shaft member of the supply portTheProvide this cover memberTheRotate with shaft memberLetAgitationThePush awayLetByAdditive supply port positionInAdditivesSupply spaceTheFormationDoOr according to any one of claims 1-9.A method for producing a lightweight solidified material.
[0033]
  (Function and effect)
  With this configuration,AdditivesSmoothly and reliablyFluid raw materialIt becomes possible to supply in a distributed manner. This form is especiallyFluid raw materialNeedless to say, this is suitable when the is in a pumping state.
[0034]
  <Claim11Invention of description>
  SaidPipe line mixerThe stirring blade has a multi-function blade having a stirring action and a mixing target transfer action and a single-function blade having only a stirring action, and these have a single function blade along the spiral direction around the shaft member. It is provided in alternate arrangement with one or two single function wings interposedThe manufacturing method of the lightweight solidification material of any one of Claims 1-10 which is a thing.
[0035]
  (Function and effect)
  If only a multi-function blade having a stirring action and a mixing target transferring action is arranged as a stirring blade, the transferring action becomes dominant as a whole, and the transferring action is given priority over stirring, and high mixing properties cannot be obtained. On the other hand, when a single-function blade having only a stirring action is attached, the transfer efficiency is lowered, and as a result, the continuous mixing property is impaired. Therefore, as described above, by adopting an alternate arrangement in which the multifunction blades and the single function blades are interleaved with the former one or every other two, the transfer property is improved without impairing the transfer characteristics. Can do. This has been confirmed by experiments.
[0036]
  <Claim12Invention of description>
  SaidPipe type mixerThe stirring blade has an elongated flat plate shape, and a plurality of stirring blades are arranged with a phase interval of 90 degrees or 60 degrees along the spiral direction centering on the shaft member.The manufacturing method of the lightweight solidification material of any one of Claims 1-11.
[0037]
  (Function and effect)
  By adopting such a configuration such as a transfer interval, more effective stirring and mixing can be performed. This has also been confirmed by experiments.
[0038]
  <Claim13Invention of description>
  SaidPipe type mixerThe screw blade is formed so that the number of windings is 1 to 3, and the pitch is 0.4 to 0.8 times the diameter of the mixing tube,
  SaidPipe type mixerThe stirring blades are arranged at 5 to 15 pitches along the spiral direction around the shaft member, with an interval of 4 to 6 per pitch.
  When the diameter of the screw blade and the stirring blade is d, the rotational speed of the shaft memberThe150-200 / πd (rpm)age,AndThe material flow velocity v in the mixing line is 10-50 m / min.The manufacturing method of the lightweight solidification material of any one of Claims 1-12 which performs the said stirring mixing as.
[0039]
  (Function and effect)
  The present inventionsoIn particular, the above-mentioned characteristics are remarkably exhibited under the configuration of such screw blades and stirring blades and operating conditions. Of course, it goes without saying that the above features also appear in other cases.
[0040]
  <Claim14Invention of description>
  PowderSolidified materialFall supplyWithFalling powderSolidified materialAgainst the granule from its surroundingsSolidified materialSupply liquid in a waterfall shape to pinch or narrowThe, PowderSolidified materialAnd the liquid togetherthisMerged powderSolidified materialAnd liquid are stirred and mixedThe manufacturing method of the lightweight solidification material of any one of Claims 1-13 which uses this stirring mixture as a solidification material added with the said pipe line type mixer.
[0041]
  (Function and effect)
  PowderSolidified materialIn the case of producing a solidified material by mixing the liquid and the liquid, for example, when mixing cement and muddy water or water, it is very difficult to continuously join the two as described above. For this problem, as described above, falling powderSolidified materialWhen the liquid is supplied in a waterfall shape so as to sandwich or narrow the granular material from its surroundings, the granular materialSolidified materialBecause it is encased in liquidSolidified materialIt is possible to reliably join the two without adhesion or the like. As a result, a solidified material having a more accurate blending ratio can be obtained.
[0042]
  <Claim15Invention of description>
  While the liquid is swirling and dropping, the granular material is in the swivel part.Solidified materialIs dropped, and the granule and liquid are merged,thisMerged powderSolidified materialAnd liquid are stirred and mixedThe manufacturing method of the lightweight solidification material of any one of Claims 1-13 which uses this stirring mixture as a solidification material added with the said pipe line type mixer.
[0043]
  (Function and effect)
  While the liquid is swirling and dropping, the granular material is in the swivel part.Solidified materialDrop the powderSolidified materialEven if the liquid and liquid are combined,Solidified materialAre combined so as to be encased in the liquid. Therefore, the granular material to the surroundingsSolidified materialIt is possible to reliably join the two without adhesion or the like. As a result, a solidified material having a more accurate blending ratio can be obtained.
[0044]
  <Claim16Invention of description>
  In adjusting the specific gravity of (A),Fluidity including moisture and solidsRaw materialsSpecific gravity adjustment tankAs well as, Fluidity in the specific gravity adjustment tankmaterialVolume ofAnd weightMeasureAndThe specific gravity is calculated based on these measurement results.,thisDepending on the specific gravity measurement result, fluidity in the specific gravity adjustment tankmaterialIs added to the specific gravity adjustment tank so that the specific gravity becomes a predetermined specific gravity.OrDrain moisture from the specific gravity adjustment tankThe manufacturing method of the lightweight solidification material of any one of Claims 1-15.
[0045]
  (Function and effect)
  On the other handIn the invention described in this section,Fluidity including water and solids such as mudmaterialWhen adjusting the specific gravity of water, not only water but also drainageStructure to doIt is characterized by the fact that it is made. Only by adjusting the specific gravity by water, it is not possible to deal with water containing a wide range of water content or when the fluctuation range of the water content is large. It has become a thing.
[0046]
  <Claim17Invention of description>
  Drain moisture from the specific gravity adjustment tankInFluidity stored in the specific gravity adjustment tankmaterialSucking out and draining the supernatant water,The method for producing a lightweight solidified material according to claim 16.
[0047]
  (Function and effect)
  When the specific gravity is adjusted by sucking and discharging the supernatant water as described above, there are advantages that the configuration is very simple, low cost, and easy to apply to existing apparatuses.
[0048]
  <Claim18Invention of description>
  Drain moisture from the specific gravity adjustment tankInThe water of the fluid material stored in the specific gravity adjusting tank is drained by suction through a filter medium,The method for producing a lightweight solidified material according to claim 16 or 17.
[0049]
  (Function and effect)
  If the specific gravity is adjusted by sucking and draining the water of the fluid material through the filter medium, the speed and reliability of the treatment can be improved. In this range, the configuration is simple, the cost is not high, and the application to existing devices is easy.
[0050]
  <Claim19Invention of description>
  Specific gravity adjustmentShiFluid materialThe method for producing a lightweight solidified material according to any one of claims 16 to 19, wherein after the stirring and mixing, the solidification material and the lightening material are added by the pipe line mixer.
[0051]
  (Function and effect)
  Specific gravity adjustment of the present inventionsoSince the fluid material is temporarily stored in the specific gravity adjustment tank, separation of moisture and solid content proceeds. Therefore, as described above, the liquidity has been adjusted for specific gravity.materialThrough a stirring and mixing processAdd solidification material and lightening material with a pipe-type mixerIs desirable.
[0052]
DETAILED DESCRIPTION OF THE INVENTION
  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
  <Embodiment of Manufacturing Method and Apparatus for Lightweight Solidified Material>
  (First form)
  FIG. 1 shows a flow of a method for producing a lightweight solidified material according to the present invention. The flowable raw material used in the present invention is not particularly limited as long as it contains moisture and solid content, but industrial waste such as mud, mud, slurry-like lime charcoal and steel slag is preferably used. If mud or mud is used, lightweight soil can be produced.
[0053]
  Such by-products are not uniform in water content. Therefore, in the present invention, the flowable raw material is first supplied to the specific gravity adjusting device 1 and the specific gravity is measured. Based on the measurement result, the blending ratio of the solidified material and the weight reducing material to be mixed later becomes a desired ratio. In addition, the specific gravity is adjusted by adding or removing moisture. Although a specific example of the specific gravity adjusting device 1 will be described later, a device having a function of solving a fluid material, a specific gravity adjusting function, and a remixing function is preferably used.
[0054]
  The fluid raw material whose specific gravity is adjusted is sent to the transfer line by the pump device 2. In the transfer line, a first pipe-type mixer 4 and a second pipe-type mixer 5 are interposed, and the flowable raw material passes through these in order. These line type mixers 4 and 5 satisfy the requirements of the present invention.I.e. having upstream supply and downstream dischargeA mixing pipe, a shaft member that is coaxially supported in the mixing pipe, screw blades and stirring blades arranged in parallel from the upstream side on the outer surface of the shaft member, a rotation driving means for the shaft member, The shaft member includes at least one additive supply port provided in a portion corresponding to the stirring blade, and is supplied into the mixing pipe.Fluid raw materialIs transferred to the additive supply port side through screw blades that are rotationally driven.Fluid raw materialAs long as the additive material is supplied from the additive material supply port and the fluidized material and the additive material are stirred and mixed by a rotationally driven stirring blade, the same material may be used even if both are used. It may be used. Preferred specific examples of the pipe-type mixer will be described later.The
[0055]
  In the first pipeline type mixer 4,Fluid raw material is pumped through the mixing pipeIn the process ofAfter rectifying by the rotationally driven screw blades, for this rectified fluid raw material,Solidified material supplied from solidified material supply deviceTheAdd from the additive supply port of the rotating shaft memberShimixtureYouThe In the illustrated example, powder solidified material such as cement (in this case, the raw material of the solidified material) is supplied from the silo 6s to the solidified material supply device 6 as needed, and mixed with liquid such as water by the solidified material supply device 6. It is assumed that the slurry-like solidified material is supplied to the first pipe-type mixer 4 after being made into a slurry.
[0056]
  The flowable raw material to which the solidifying material is added in the first pipe-type mixer 4 is then passed through the second pipe-type mixer 5. In the second pipeline type mixer 5,Flowing raw material with added solidification material is pumped through the mixing pipe.In the process ofAfter rectifying by the rotationally driven screw blades, for this rectified fluid raw material,Lightweight materials such as foaming agent, foam beads, foamed resin shredded fragmentsTheAdditive mixingYouThe
[0057]
  Thus, by passing through the first and second pipe-type mixers 4 and 5, the flowable raw material is changed into a light solidified material in the transfer process. At this time, in the first embodiment, a configuration is adopted in which the first and second pipe-type mixers 4 and 5 are passed only by the original pressure of the pump that sends the flowable raw material whose specific gravity is adjusted to the transfer line. It is also characterized by a very simple and energy saving configuration. Therefore, the mixing ratio of the flowable raw material and the solidifying material or the lightening material in the first and second pipe-type mixers 4 and 5 measures the flow rate between the feed pump and the first pipe-type mixer 4. Accordingly, it can be determined by adjusting or controlling the supply amount of the solidifying material supply device 6 or the lightening material supply amount.
[0058]
  In the illustrated example, when the light weight solidified material is charged as the backfill of the retaining wall W covering the slope G, the light solidified material C is changed into the light solidified material C in the process of transferring the fluid raw material to the slope. Is assumed.
[0059]
  (Second form)
  On the other hand, the example shown in FIG. 2 shows a system configuration example in the case of using a hopper supply type pipe-type mixer 4 ′ (details will be described later as a fifth mixer example). That is, the flowable raw material is supplied to the specific gravity adjusting device 1, and after the specific gravity is adjusted in the same manner as in the example shown in FIG. 1, a predetermined amount is continuously cut out by a quantitative cutting means such as the rotary feeder R. It is dropped and supplied to the pipe-type mixer 4 '.
[0060]
  The flowable raw material supplied to the first pipe-type mixer 4 ′ isWhile being transferred to the downstream side by an extrusion amount that is greater than the supply amount per unit time of the fluid raw material by the screw blade that is driven to rotate,The transfer processFor fluid raw materialsThe solidified material supplied from the solidified material supply device 6 ′ isFrom the additive supply portAdditionAgitated by a rotationally driven agitating bladeMixed. In the illustrated example, powder solidified material such as cement is supplied from the silo 6s to the solidified material supply device 6 as needed, and a predetermined amount is continuously supplied to the first pipe type while the solidified material supply device 6 remains in the form of granular material. The case where it supplies to mixer 4 'is assumed. In this case, liquiditymaterialThe mixing ratio of the solidifying material and the solidifying material can be determined by presetting the supply amounts of the rotary feeder R and the solidifying material supply device 6 '.
[0061]
  The flowable raw material to which the solidifying material is added in the first pipe-type mixer 4 'is then supplied to the second pipe-type mixer 5 by the pumping pump 2, and the second pipe-type mixer is the same as in the above example. In the process of passing through the 5 pipes, the lightening material is added and mixed to be converted into a lightweight solidified material.
[0062]
  In the second embodiment, the supply amount of the flowable material to the second pipe-type mixer 5 is determined by the pressure-feed flow rate of the pressure-feed pump 2, and therefore between the pressure-feed pump 2 and the second pipe-type mixer 5. The blending ratio in the second pipe-type mixer 5 can be determined by interposing the flow meter 3 and adjusting or controlling the supply amount of the lightening material according to the measurement result. Others are basically the same as the first embodiment.
[0063]
  (Third form)
  In the above example, a solid line material addition and a light weight material addition are separately provided as the line type mixer. In the present invention, as shown in FIG. 3, one line type mixer is provided. 40 (the pipe-type mixer 40 in the figure corresponds to the example shown in FIG. 11 described later), a plurality of additive supply ports are provided at appropriate intervals in the longitudinal direction of the shaft member, and from the upstream supply port, It is also possible to add a solidifying material and add a lightening material from the supply port on the downstream side. In this case, it is necessary to take a long stirring and mixing portion. However, since it is possible to add and mix the solidifying material and the lightening material with a single pipe-type mixer 40 as a whole, there is an advantage that the system can be made compact. .
[0064]
  (Deformation)
  As can be seen from the comparison between the first and second embodiments, when the pipe-type mixer is used in series, the material can be transferred by arranging a pressure pump at an appropriate place (one place or a plurality of places).
[0065]
  In addition, as long as the solidifying material and the lightening material are added and mixed in this order, one or more pipe-type mixers are added, or one or more additive material supply ports are added to the shaft member, so that the solidifying material and the weight are reduced. The same or different materials can be added before, during or after the addition of the materials. Specifically, after adding and mixing the solidifying material, many variations are conceivable, such as mixing coal ash as the first lightening material and subsequently introducing bubbles as the second lightening material.
[0066]
  <Embodiment of a pipeline mixer>
  (First mixer example)
  4 shows the first fluid material X such as mud.(Equivalent to fluid raw material. The same shall apply hereinafter.)The embodiment in the case of supplying pressure to the pipe-type mixer apparatus 10 by a pump or the like is shown. That is, in this pipe-type mixer apparatus example 10, the shaft member 14 is coaxially supported in the inner space of the mixing pipe 12 having the upstream supply section 12i and the downstream discharge section 12e. A large number of screw blades 14s and stirring blades 14m are provided on the outer peripheral surface of the blade 14 at intervals in the longitudinal direction in order from the upstream side. The base end portion of the shaft member 14 is penetrated to the outside of the pipe through the S-shaped bent portion of the mixing pipe 12 and is connected so as to be able to transmit power to the rotation driving means 15 such as a motor. Further, the shaft member 14 is hollow, and an injection port 14a communicating with the inside and outside is formed at a position corresponding to the middle of the stirring blade forming portion, and the base end opening communicates with the supply pipe line 17 via the swivel device 16. The second fluid material Y is supplied from the supply pipe line 17 to the formation portion of the stirring blade 14m through the shaft member 14 and the injection port 14a in this order.
[0067]
  The first fluid material X is pressure-supplied and supplied to the supply unit 12 i of the pipe-type mixer device 10 by, for example, a piston pump. The first fluid material fed under pressure into the mixing line 12 is first de-energized and rectified by the rotationally driven screw blades 14s to form a substantially continuous flow. At this time, depending on the type of the first fluid material X, preliminary stirring is also performed at the same time. In particular, when the first fluid material X is pressure-fed and supplied by an intermittent supply means such as a piston pump, the first wave pattern in which the pressure-feeding state and the pressure-feed stop state are repeatedly and instantaneously repeated by switching the valve. The fluid material reaches the screw blade 14s. The screw blade 14s reduces the wave pressure, and also has a function of performing suction extrusion when the pumping is stopped.
[0068]
  The first fluid material rectified by the screw blades 14s is then pre-stirred by the stirring blade 14m that is rotationally driven on the upstream side of the injection port 14a, and then the second fluid material Y that is quantitatively supplied from the injection port 14a.(Equivalent to additive. The same shall apply hereinafter.)The first fluid material and the second fluid material are agitated and mixed by the agitating blade 14m that is rotationally driven at the injection port position and downstream thereof, and the agitated mixture is discharged through the discharge portion 12e.
[0069]
  In particular, in the case where the first fluid material X is fed by pressure as in this example, the amount of rectification per unit time by the screw blade 14s is the unit time of the first fluid material X in order to exert the above rectifying action. It is recommended to configure it so that it will be more than the supply per unit. The amount of rectification of the screw blade 14s can be obtained by a test, and the supply amount of the first fluid material X is obtained from a predetermined pump capacity, or a flow meter or the like is provided upstream of the pipe-type mixer device 1. Intervening measurementOrcan do. For this purpose, the rotational speed of the screw blade 14s by the rotation driving means 15 is appropriately set or controlled according to the supply amount of the first fluid material, and the size / shape, the pipe volume, etc. of the screw blade 4s are appropriately set. To designOrcan do.
[0070]
  In the pipe-type mixer device 1 configured in this way, the first fluid material supplied into the mixing pipe 12 is converted into a stable continuous quantitative flow by a rectifying action by the screw blade 14s.ShiThen, it can be mixed with the second fluid material Y. Therefore, in the present invention, the first and second fluid materials X and Y can be mixed at a stable ratio. In the pipe-type mixer of the present invention using such a rectifying action, even when the first fluid material X is supplied by an intermittent supply means such as a piston pump, the pulsation can be canceled out by screw blades and continuously quantified. .
[0071]
  The first fluid material X in the first mixer example can be mud and mud, as well as mud such as slurry coal ash and steel slag, and the second fluid material Y is cement / lime-based solidified material. In addition, it can be a material that is mixed with mud such as foaming agent, coal ash, foamed beads, fluidizing agent, and hydrophobic agent.
[0072]
  For example, mud can be supplied by pumping as the first fluid material X, and a solidified material can be added and kneaded as the second fluid material to produce a solidified soil. In this case, the solidifying material or the like in this case can be applied in the form of a granular material or a slurry. However, since the powder solidified material is supplied by being put on the pressure air, when the exhaust means is not provided in the mixing pipe line 12 as in this example, the mixture is fed with mixed air pressure in which air is mixed into the mixture. In this case, the pressure for feeding the mixture to the discharge unit 12e is obtained by adding the pressure of the supply air of the granular solidified material to the supply pressure of the mud. On the other hand, when a slurry-like solidifying material is added and mixed, mixed pressure feeding is not performed. In this case, the pressure for sending the mixture to the discharge part 12e is due to the supply pressure of the mud.
[0073]
  (Second mixer example)
  As in the first example, the mixing pipe 12 is a straight pipe that is horizontally arranged and discharged from the end opening, or the mixing pipe is a straight pipe that is horizontally arranged and has a discharge portion on the bottom surface, although not shown. If the part or the whole of the downstream side of the stirring blade 14m is located below the portion corresponding to the screw blade 14s and the stirring blade 14m as shown in FIG. It is assumed that the portions corresponding to the blades 14s and the stirring blades 14m are not easily filled, and mixing at a desired ratio cannot be performed.
[0074]
  In the second example shown in FIG. 5, the portions corresponding to the screw blades 14s and the stirring blade 14m of the mixing pipe 12 are straight pipes and are horizontally arranged, but the downstream portion of the stirring blade 14m is bent to discharge the discharge portion 12e. Is located above the portions corresponding to the screw blades 14s and the stirring blade 14m. By adopting such a configuration, although the mixing pipe 12 is a straight pipe and horizontally arranged, the feeding resistance of the stirring mixture is increased, and the parts corresponding to the screw blades 14s and the stirring blade 14m are filled with the fluid material to ensure that And sufficient mixing becomes possible. In addition, if there is resistance to feeding the stirring mixture, a stable amount can be discharged, making it easy to manage the amount.
[0075]
  (Third mixer example)
  As shown in FIG. 6, although the mixing pipe 12 is a straight pipe, even if the entire pipe 2 is inclined so that the downstream side is on the upper side, the feeding resistance of the mixture is increased and the stirring and mixing portion is filled with the material. be able to. In the illustrated embodiment, a discharge portion (discharge port) 12e is provided at the bottom of the downstream end portion of the mixing pipe 12, but this discharge portion 12e is located above the portion corresponding to the screw blade 14s and the stirring blade 14m. Therefore, the feeding resistance of the mixture is still increased. Further, only in the example shown in FIG. 6, the upstream bent portion is bent in the horizontal direction, but the same configuration can be adopted in other examples.
[0076]
  (Fourth mixer example)
  Although not shown, although the mixing pipe is a straight pipe, a discharge part 12e is provided at the upper end of the downstream side of the mixing pipe to overflow the mixture, thereby increasing the feeding resistance of the mixture and filling the stirring and mixing part with the material. be able to.
[0077]
  (Fifth mixer example)
  On the other hand, FIG. 7 shows an embodiment suitable for the case where the first fluid material X is supplied into the mixing pipe line 12 in a non-pumping state. In the example of the pipe-type mixer device according to the second embodiment, the mixing pipe 12 is a straight pipe, and the first fluid material X is supplied to the upper wall at a position corresponding to the portion where the screw blade 14s is formed. This is different from the other examples in that a supply portion (supply port) 12i is formed in communication and a hopper 12h is connected to the supply portion via a quantitative feeder (rotary feeder in the figure) 12r. Other configurations are basically the same as the above-described example.
[0078]
  In such a pipe-type mixer apparatus, the first fluid material X stored in the hopper 12h is cut out by the quantitative feeder 12r, and dropped and supplied into the mixing pipe line 12 through the supply unit 12i. The supplied first fluid material X is extruded as a continuous quantitative flow toward the discharge portion 12e by the extrusion action of the screw blade 14s. The extruded first fluid material is preagitated (premixed) by the agitating blade 4m that is rotationally driven upstream of the injection port 14a, and then the second fluid material that is quantitatively injected and supplied from the injection port 4a. Y is joined, and the first fluid material and the second fluid material are agitated and mixed by the agitating blade 14m that is rotationally driven at the position of the injection port 14a and downstream thereof, and this agitated mixture is discharged via the discharge portion 2e. Is done.
[0079]
  As described above, when the first fluid material X is supplied in a non-pumping state, the extrusion amount per unit time by the screw blade 14s is supplied to be less than the supply amount per unit time of the first fluid material X. The first fluid material X is stably and surely fed into the downstream portion of the screw blade 14s, and the portion cannot be filled with the material, and mixing at a stable ratio is difficult. Therefore, it is recommended that the amount of extrusion per unit time by the screw blade 14s be equal to or greater than the amount of supply of the first fluid material X per unit time. As a result, the material can be constantly filled on the downstream side of the screw blade 14s. In this case, the mixed material for the amount of extrusion by the screw blade 14s is reliably discharged from the mixer device.
[0080]
  (Sixth mixer example)
  In the present invention, as shown in FIG. 8, the first fluid material X can also be supplied into the mixing conduit 12 from a supply port 14 d provided separately in the shaft member 14. In this case, the shaft member 14 is composed of a double pipe (or two parallel pipes), and the outlets 14a and 14d of the respective flow paths are opened on the outer surface of the shaft member, and one is used for the first fluid material X. The other can be configured for the second fluid material Y. In this case, for example, the slurry-like solidified material and the solidified soil can be produced by supplying the kneaded water, the muddy water, and the mud from the upstream side, and supplying the granular material or the slurry-like solidified material from the downstream side.
[0081]
  (Detailed configuration of mixer)
  As described in the section of the first mixer example, when the slurry-like material is supplied by pumping and the granular material is supplied by pressure, mixed pressure feeding is performed without an exhaust means. In this case, it may be assumed that air cannot be smoothly transferred because air easily changes in volume. In such a case, as shown in the third and fourth examples, it is preferable to provide an exhaust means on the upper part of the mixing pipe 12 on the downstream side of the powder and granular material supply position. In the illustrated example, it is preferable to provide an exhaust means by providing a hollow space 12 s at a predetermined portion of the kneading pipe 12 and communicating an exhaust port 12 d above the hollow space 12 s. On the other hand, when supplying the solidified material or the like in a slurry state, no exhaust means is required.
[0082]
  Moreover, in the form which pressure-feeds and supplies the 1st fluidized material X, there exists a rectification | straightening / depressurization effect | action by the screw blade 14s, For this reason, the momentum of sending out of a mixture reduces, and the case where smooth discharge cannot be performed is also assumed. Therefore, as shown in FIGS. 4 and 5, it is also preferable to provide boost screw blades 14 b for promoting the delivery of the mixture to the downstream discharge portion on the downstream side of the stirring blade 14 m in the shaft member 14. In addition, in the example shown in FIGS. 6-8, the screw blade 14r provided in the downstream of the stirring blade 14m in the shaft member 14 does not have the said boost effect | action. This is because the transfer direction is opposite to that of the upstream screw blade 14s and the boost screw blade 14b, and the mixture sequentially pushed out by the stirring blade does not pass over the discharge port 12e below the mixing pipe 12. Push it back and drop it smoothly into the outlet.
[0083]
  Furthermore, in the pipe-type mixer of the present invention, as shown in FIGS. 3 to 9, it is also preferable that a cover member 14 c be provided on the front side of the second fluid material supply port 14 a in the shaft member in the shaft member rotation direction. . Since the cover member 14c rotates while pushing the agitated material along with the shaft member 14, a supply space (cavity) of the second fluid material is always formed at the position of the second fluid material supply port 14a. A second fluid material is delivered to the space. Therefore, the second fluid material can be distributed and supplied smoothly and reliably into the first fluid material. FIGS. 9 (a) and 9 (b) show, in contrast, a state in which the transfer angle is 90 ° different from each other, and the configuration of both is the same.
[0084]
  Further, as shown in detail in FIG. 9, the stirring blade 14m of the present invention is knitted by a multi-function blade m2 having a stirring action and a mixing target transferring action and a single function blade m1 having only a stirring action, and these are shaft members. It is also a preferred form that the multi-function blades m2 are provided in an alternate arrangement along the spiral direction centering around 14, with one or more double-function blades m1 interposed therebetween. In the illustrated example, the multi-function blade m2 is a flat plate inclined at a predetermined angle with respect to a plane orthogonal to the axis, while the single-function blade m1 is a flat plate parallel to the plane orthogonal to the axis. It has become. By adopting such an alternate arrangement, the mixing property can be improved without impairing the transfer characteristics.
[0085]
  It may be considered that the multi-function blade m2 is preferably a propeller shape (curved plate shape) obtained by cutting off a part of the screw. The arrangement is preferable because the direction of the movement of the mud changes depending on the position where the mud hits, and the mixing and stirring property is further improved. That is, as shown in FIG. 10, at point A and point B on the same turning radius, the pushing force P acting at right angles to the rotation direction is outward at point A along the flat multi-functional blade surface. Inward moving force P1 and point B generate inward moving force P2, which increases the agitation effect.
[0086]
  However, the pipe-type mixer of the present invention can be made to function by adjusting the supply pressure of the first fluid material only with any one stirring blade.
[0087]
  Further, when a plurality of the stirring blades 14m of the present invention are arranged with a phase interval of 90 degrees or 60 degrees along the spiral direction with the shaft member 14 as the center, more effective stirring and mixing can be performed. Has also been found.
[0088]
  Furthermore, the present inventors have obtained the knowledge that the combination of the following configurations and operating conditions of the screw blade 14s and the stirring blade 14m and the operating conditions are very suitable from the results of research and development up to now.
  1. Number of screw blade turns: 1-3 (sheets)
  2. Screw blade pitch (SP): 0.4 to 0.8 times the diameter of the mixing tube
  3. Arrangement of stirring blades: spiral arrangement
  4). Number of stirring blades: 5 to 15 pitches at intervals of 4 to 6 per pitch (MP)
  5. Shaft member rotation speed during operation: 150 to 200 / πd (rpm)
  Here, d is the diameter of the screw blade and the stirring blade.
  6). Material flow velocity in the mixing line v: 10-50 m / min
[0089]
  (Example of multiple shaft member supply ports)
  On the other hand, in the pipe-type mixer apparatus of the present invention, three or more supply means are provided in one pipe-type mixer apparatus, and two or more kinds of materials are mixed through more paths than in the above example. It can comprise so that it may supply in a pipe line.
[0090]
  Specifically, as shown in FIGS. 11 and 12, a portion corresponding to the stirring blade 14m is made long, and a plurality of supply ports are provided at predetermined intervals in the portion corresponding to the stirring blade 14m in the shaft member 14. it can. The example shown in FIG. 11 is a modification of the above-described second example, and the example of FIG. 12 is a modification of the above-described third example, to which one shaft member supply port 14a is added. As described above. However, in these examples 40 and 50, the downstream end of the shaft member 14 is led out through the mixing pipe 12 and between the upstream supply port 14a and the downstream supply port 14a in the shaft member 14. The portion is blocked by a blocking member (not shown). Thus, if the material Y1 to be added and mixed first is supplied from the upstream end of the shaft member 14, it is supplied from the upstream supply port 14a into the mixing conduit 12, and the upstream and downstream supply ports 14a, 14a. It is mixed with the first fluid material X by the stirring blade 14m positioned therebetween. Further, if the material Y2 to be added and mixed later is supplied from the downstream end of the shaft member 14, it is supplied from the downstream supply port 14a into the mixing pipe 12, and is located downstream of the downstream supply port 14a. The first flow material X mixed with the material Y1 is mixed by the stirring blade 14m.
[0091]
  In this case, the material Y1 supplied from the upstream supply port 14a and the material Y2 supplied from the downstream supply port can be the same or different. Further, the number of supply ports of the shaft member 14 can be further increased. In this case, the shaft member 14 has a double or more multi-pipe structure, and a supply path for the fluid material is formed through the gaps between the pipe lines. (Not shown).
[0092]
  (Example of connecting multiple pipe-type mixers in series)
  The pipe-type mixer of the present invention allows mixing with another additive material (second fluid material) during the material conveyance process by interposing it as a part of the material conveyance pipe line. In the case of different types or when multiple types of additive materials can be supplied via a common pipeline, it is possible to install only one pipeline mixer on a single transfer line. When adding and mixing materials in stages, etc., a plurality of pipe-type mixer devices are connected in series directly or indirectly through other devices or pipes, and added sequentially in each pipe-type mixer device. Additional ingredients can be mixed.
[0093]
  Specific examples are shown in FIGS. In the example shown in FIG. 13, the mixers 10 and 10 of the first example described above are connected in series via the transport pipe T, and the second and third fluid materials are compared with the first fluid material X. Y1 and Y2 are sequentially mixed. Moreover, the example shown in FIG. 14 arrange | positions the pipe line type mixer 10A which has the discharge port 12e opened below on the upstream side, arrange | positions the pipe line type mixer 10B which has the supply port 12i opened on the upper side, The downward discharge port 12e of the upstream mixer 10A and the upward supply port 12i of the downstream mixer 10B are directly connected, and both mixers 10A and 10B are integrated. Thus, what has two or more mixing parts is also contained in the pipe line type mixer of the present invention. In the example shown in FIG. 14, according to the positional relationship between the material transfer source and the transfer destination, any one of the mixers 10A is rotated with respect to the other mixer 10B by an arbitrary angle around the connecting portion. For example, as shown in FIG. 15, a U-shaped arrangement that performs the return transfer of the material may be employed.
[0094]
  In these specific examples, it is of course possible to use the other pipe-type mixer described above (not shown).
[0095]
  By the way, although the manufacturing method of the above-mentioned light weight solidification material applies such a serial form, the serial connection form of the pipe mixer of the present invention is not restricted to the above-mentioned manufacturing method of the light weight solidification material. For example, contrary to the manufacturing method of the above-mentioned light weight solidification material, it uses also in the form which supplies a light weight material in the 1st pipe line type mixer 4, and mixes a solidification material in the 2nd pipe line type mixer 5. be able to.
[0096]
  <Embodiment of solidification material supply apparatus>
  FIG. 16 shows an example of a solidifying agent supply apparatus according to the present invention. Reference numeral 20 denotes a granular material storage hopper that temporarily stores granular materials such as cement. For example, the granular material stored in a silo or the like is supplied into the hopper 20 from the upper supply port 20i as necessary. Supplied.
[0097]
  The granular solidified material supplied to the hopper 20 is cut out by a quantitative cutting device (rotary feeder in the illustrated example) 21, dropped and discharged from its discharge port, and the radial center of the straight merged conduit 22 along the vertical direction. Through the portion, it is charged into the supply unit 23i of the stirring and mixing device 23. In the merging pipeline 22, an annular liquid reservoir weir 22d is provided around the central part where the powder particles fall and flow, and the liquid supply penetrating the pipe wall into the weir 22d (outside from the central part) The tube 22i is in communication. Therefore, when a liquid (water, additive, etc.) is supplied from the liquid supply pipe 22i, the liquid is temporarily stored in the weir 22d and then overflows the weir 22d and is supplied in a waterfall shape to the center. On the other hand, the stirring and mixing device 23 is basically the same as that in which the hopper, the rotary feeder and the exhaust means are omitted from the above-described pipe-type mixer shown in FIG.
[0098]
  In the solidification material supply apparatus configured as described above, the granular material dropped and supplied into the merging pipeline 22 overflows the surrounding weir 22d in the process of passing through the central portion in the merging pipeline 22, and forms a waterfall. It is sandwiched or squeezed by the liquid supplied to the liquid and merged with the liquid so as to be wrapped by the liquid. The joined granular material and liquid are stirred and mixed by the stirring and mixing device 23 and then sent to the outside.
[0099]
  FIG. 17 shows another example of the solidifying material supply apparatus according to the present invention. In this embodiment, the confluence pipe is a cyclone chute 22S having an inverted frustoconical shape with respect to the embodiment shown in FIG. 16, and the liquid supply pipe 22i is communicated with the inner wall of the upper part so as to face the inner circumferential direction. There are mainly differences. In this case, the liquid supplied from the liquid supply pipe into the cyclone chute is swung down along the inner peripheral surface. Therefore, the granular material dropped and supplied into the cyclone chute 22S is dropped into the swirl descending portion of the liquid and merged so as to be wrapped by the liquid. The stirring and mixing device 23 is a pipe-type mixer, and is a horizontal straight pipe-type mixing tube in which a supply port 24i communicating with the lower part of the cyclochute 22S is formed in the upper part on the upstream side and a discharge port 24e is formed in the upper part on the downstream side. It has a path, and is a type in which the mixture is discharged from the discharge port 24e by overflow.
[0100]
  In these examples, the particles are merged so as to be wrapped by the liquid, so that both the inner surface of the merging pipe and the inner surface of the stirring and mixing device can be surely joined together without adhesion of the particles to the surroundings. Can be made. As a result, there is an advantage that a solidified material having a more accurate blending ratio can be obtained.
[0101]
  In these examples, as shown in the figure, the hopper 20 and the quantitative cutout device 21 are connected to the merging pipe line 22 and the like via the flexible joint 25 and are suspended via the load cells 26 and 26. The amount of stored powder particles in the hopper 20 and the quantitative cutout device 21 can be measured by the measured value. In addition, a method of managing the amount of liquid by supplying it from a metering pump through a flow meter or a method of supplying a liquid from a water tank or a water hopper through a rotary feeder can be adopted (not shown). Further, in the above example, a pipe-type mixer is used as the stirring and mixing devices 23 and 24, but a batch type or continuous type agitator may also be used.
[0102]
  <Embodiment of specific gravity adjusting device>
  For example, as described above, when using a material whose quality is not stable, such as dredged mud, the quality control is important. Specific gravity management is one of the main parameters. Contains moisture and solidsFluid raw materialThe specific gravity management is nothing but the adjustment of water content. Here, we propose a specific gravity adjustment device that can handle hydrated substances with a wide range of moisture content and when the variation range of moisture content is large.
[0103]
  FIG. 18 shows a specific gravity adjusting device example 30 according to the present invention, which includes a specific gravity adjusting tank 31 as a main component. The specific gravity adjustment tank 31 isFluid raw materialA water level sensor 31S is provided as a volume measuring means for measuring the volume of the water. That is, since the specific gravity adjustment tank has a certain volume, it is only necessary to measure the water level by the water level sensor 31S.Fluid raw materialCan be measured.
[0104]
  In the illustrated embodiment, the specific gravity adjustment tank 31 is suspended by load cells 31L and 31L, and the load cell 31LFluid raw materialThe weight of can be measured. And based on these measurement results,Fluid raw materialSpecific gravity can be obtained. This specific gravity measurement is performed by a control device (not shown), for example.
[0105]
  Also, into the tank 31Fluid raw materialThe supply pipe 31 </ b> A and the water supply pipe 31 </ b> B open above the tank 31, and a suction pipe 31 </ b> C for sucking the supernatant water is inserted into the upper part of the tank 31.
[0106]
  In the specific gravity adjustment tank 31 thus configured, the specific gravity of the fluid material is measured by measuring the volume and mass of the fluid material introduced into the tank 31 with the water level sensor 31S and the load cell 31L. When the specific gravity is not satisfied, a specific amount of water is sucked and drained through the suction pipe 31C, and when the specific gravity is larger than the expected specific gravity, the specific gravity is adjusted by performing the required amount of water through the water supply pipe 31B. be able to. That is, the specific gravity adjustment tank 31 is mainly composed of water, and when drainage is required, the supernatant water is drained after waiting for sedimentation of soil particles. This operation can be performed by a control device (not shown).
[0107]
  On the other hand, in the present embodiment, a discharge port is provided at the bottom of the specific gravity adjustment tank 31, and this discharge port communicates with the agitator tank 33 (stirring and mixing means) via a valve such as the gate valve 32. Therefore, the fluid material adjusted in specific gravity is supplied to the agitator tank 33 by opening the gate valve 32, and is stirred and mixed.Fluid raw materialIs temporarily stored in the specific gravity adjustment tank 31, since the separation of moisture and solid content proceeds, the specific gravity adjustment is thus completed.Fluid raw materialIs preferably supplied to the outside through a stirring and mixing process.
[0108]
  The agitator tank 33 in the illustrated example is supported at the bottom by a stirring shaft 33x extending in the horizontal direction, and on the outer surface of the stirring shaft 33x, a number of stirring blades m2 having a transfer function and a stirring function are provided. The rotary drive source 33m outside the tank 33 is connected to be driven to rotate, and a discharge port is formed at the bottom of the agitator tank at a downstream position in the material transfer direction by the stirring blade m2.
[0109]
  Further, the specific gravity adjusting device shown in the figure assumes the manufacturing method shown in FIG. 2 described above, and is connected to the discharge port of the agitator tank 33 through a quantitative cutting device R (in the example shown, a rotary feeder). A mixer 4 ′ is connected, and the fluid material stirred in the agitator tank 33 is cut out by the cutting device R and supplied in a fixed amount to the pipe-type mixer 4 ′. Further, in this case, in order to increase the supply accuracy to the pipe-type mixer 4 ′, in the illustrated embodiment, the agitator tank 33 is suspended by load cells 33R and 33R, and the amount of fluid material retained in the agitator tank 33 measured by the load cell 33R. It is also a desirable form that the rotation of the quantitative cutout device R is controlled according to the above.
[0110]
  On the other hand, FIG. 19 was stored in the specific gravity adjustment tank 31.Fluid raw materialIn this example, the water is actively sucked and drained through the filter medium 31F (even when the supernatant water is discharged as described above, it can also be sucked through the filter medium).
[0111]
  More specifically, a filter medium 31F such as a filter cloth is built in the specific gravity adjusting tank 31 so as to surround the center portion, and a drainage space 31z between the enclosed portion and between the outer surface of the filter medium 31F and the inner surface of the tank 31. Is blocked by the filter medium 31F, and the suction pipe 31C passes through the tank wall and faces the drainage space 31z. Also, into the tank 31Fluid raw materialThe supply pipe 31 </ b> A and the water supply pipe 31 </ b> B are open on the inside of the surrounding portion by the filter medium 32 </ b> F.
[0112]
  In this case, at the time of drainage, when the fluid material is supplied into the portion surrounding the filter medium 31F in the adjustment tank 31, only the water oozes out through the filter medium 31F to the drainage space 31z due to its own pressure. Is sucked and discharged through a suction pipe 31C.
[0113]
  In this form, as long as the said function can be exhibited, arrangement | positioning of the filter medium 31F is arbitrary. When a filter cloth is used as the filter medium, as shown in FIG. 20, a cylindrical filter cloth is arranged along the inner peripheral surface of the adjustment tank 31 as shown in (a), or as shown in (b). The required number of filter cloth support members 31P and 31P are erected on the outer periphery of the filter cloth support members 31P and 31P so as to protrude locally toward the center at predetermined intervals in the circumferential direction, or arranged in a six-vertex star shape as shown in (c). can do.
[0114]
  Further, the specific gravity adjusting device 30 ′ shown in FIG. 19 is based on the manufacturing method shown in FIG. 1, and the piston pump 2 is connected to the discharge port of the agitator tank 33. Thus, the fluid material can be sucked and taken out from the agitator tank 33 and the fluid material can be sent to the outside (the first pipe-type mixer 4 in the embodiment shown in FIG. 1).
[0115]
【The invention's effect】
  As described above, according to the present invention, mixing at a stable ratio becomes possible. In addition, a homogeneous lightweight solidified material can be produced from mud and muddy water.
[Brief description of the drawings]
FIG. 1 is a flowchart of a method for producing a metered solid material according to the present invention.
FIG. 2 is a flowchart of another method for producing a metered solid material according to the present invention.
FIG. 3 is a flowchart of another method for producing a metered solid material according to the present invention.
FIG. 4 is a longitudinal sectional view showing a first example of a pipe-type mixer.
FIG. 5 is a longitudinal sectional view showing a second example of the pipe-type mixer.
FIG. 6 is a longitudinal sectional view showing a third example of the pipe-type mixer.
FIG. 7 is a longitudinal sectional view showing a fifth example of the pipe-type mixer.
FIG. 8 is a longitudinal sectional view showing a sixth example of the pipe-type mixer.
FIGS. 9A and 9B are an enlarged vertical cross-sectional view and a cross-sectional view of main parts of a pipe-type mixer, showing different rotation angles. FIGS.
FIG. 10 is an explanatory diagram of the principle of stirring and mixing.
FIG. 11 is a longitudinal sectional view showing an example of another pipe-type mixer.
FIG. 12 is a longitudinal sectional view showing an example of another pipe type mixer.
FIG. 13 is a longitudinal sectional view showing an example in which a plurality of pipeline mixers are connected.
FIG. 14 is a longitudinal sectional view showing another example in which a plurality of pipe-type mixers are connected.
FIG. 15 is a longitudinal sectional view showing another example in which a plurality of pipe-type mixers are connected.
FIG. 16 is a longitudinal sectional view showing an example of a solidifying material supply device.
FIG. 17 is a longitudinal sectional view showing another example of a solidifying material supply device.
FIG. 18 is a longitudinal sectional view showing an example of a specific gravity adjusting device.
FIG. 19 is a longitudinal sectional view showing another specific gravity adjusting device example.
FIG. 20 is a cross-sectional view showing an example of the arrangement of filter media.
[Explanation of symbols]
  DESCRIPTION OF SYMBOLS 1,30 ... Specific gravity adjustment apparatus, 2 ... Piston pump, 4,4 ', 5,10 ... Pipe line type mixer apparatus, 6 ... Solidification material supply apparatus, 12 ... Mixing pipe line, 12i ... Supply part, 12e ... Discharge part , 14 ... shaft member, 14s ... screw blade, 14m ... stirring blade, 14a ... injection port, X ... first fluid material, Y ... second fluid material, 3, 30 ... specific gravity adjusting device.

Claims (19)

A mixing pipe having an upstream supply section and a downstream discharge section, a shaft member coaxially supported in the mixing pipe, screw blades and agitation arranged in parallel from the upstream side on the outer surface of the shaft member A flowable raw material that is provided in a mixing pipe line is provided with a blade, a rotation driving means of a shaft member, and at least one additive supply port provided at a portion corresponding to the stirring blade in the shaft member. After being transferred to the additive supply port side through a screw blade that is rotationally driven, the additive material is supplied to the fluid raw material from the additive material supply port, and the fluid raw material and the additive material are rotationally driven with stirring blades Using the first pipe-type mixer and the second pipe-type mixer configured to be stirred and mixed by
A method of changing a flowable raw material containing moisture and solids into a lightweight solidified material while being pumped to a destination;
(A) Adjusting the specific gravity of the fluid raw material by adding or removing moisture,
(B) The fluidity material adjusted in specific gravity is continuously pumped in this order through the mixing pipe of the first pipe-type mixer and the mixing pipe of the second pipe-type mixer ,
(B1) In the process of pumping the inside of the mixing pipe of the first pipe-type mixer, after rectifying by rotationally driven screw blades, the solidified material is supplied to the rectified fluid raw material from the additive supply port. The fluid raw material and the solidified material are stirred and mixed by a stirring blade that is driven to rotate,
(B2) The flowable raw material to which the solidifying material has been added is rectified by screw blades that are rotationally driven in the process of pumping the inside of the mixing pipe of the second pipe mixer, and then from the additive supply port. Supply the lightening material, stir and mix the flowable raw material and the lightening material to which these solidification materials are added, with a stirring blade that is driven to rotate.
A method for producing a lightweight solidified material. A mixing pipe having an upstream supply section and a downstream discharge section, a shaft member coaxially supported in the mixing pipe, screw blades and agitation arranged in parallel from the upstream side on the outer surface of the shaft member A blade, a rotation driving means of the shaft member, and an upstream side additive material supply port and a downstream side additive material supply port which are provided at intervals in the longitudinal direction of the shaft member at a portion corresponding to the stirring blade in the shaft member The flowable raw material supplied into the mixing pipe line is transferred to the additive supply port side through the screw blades that are rotationally driven, and then the additive is supplied to the flowable raw material from the additive supply port. , Using a pipe-type mixer configured to stir and mix these fluid raw materials and additives with a rotationally driven stirring blade,
A method of changing a flowable raw material containing moisture and solids into a lightweight solidified material while being pumped to a destination;
(A) Adjusting the specific gravity of the fluid raw material by adding or removing moisture,
(C) While the fluidity material adjusted in specific gravity is continuously pumped through the mixing pipe of the pipe-type mixer,
(C1) After rectifying by the rotationally driven screw blade, the solidified material is supplied to the rectified fluid raw material from the upstream additive supply port, and the fluid raw material and the solidified material are rotated by a stirring blade that is rotationally driven. Stirring and mixing
(C2) Next, the weight reducing material is supplied from the downstream additive supply port to the fluid raw material to which the solidifying material is added, and the fluid raw material to which the solidifying material is added and the weight reducing material are driven to rotate. Mix by stirring,
A method for producing a lightweight solidified material. Addition of each additive while passing the flowable raw material adjusted in specific gravity only by the original pressure of this pumping pump through the said pipe-type mixer by interposing a pumping pump upstream of the pipe-type mixer that performs the above-mentioned solidifying material addition The manufacturing method of the lightweight solidification material of Claim 1 or 2 which mixes. The light weight according to any one of claims 1 to 3, wherein the stirring and mixing is performed under a condition in which a rectifying amount per unit time by the screw blade is equal to or more than a supply amount per unit time of the fluid raw material. A method for producing a solidified material. The lightweight solidification according to any one of claims 1 to 4, wherein a boost screw blade is provided on the downstream side of the stirring blade in the shaft member of the pipe-type mixer, and the feeding of the stirring mixture to the downstream discharge portion is promoted. Material manufacturing method. A mixing pipe having an upstream supply section and a downstream discharge section, a shaft member coaxially supported in the mixing pipe, screw blades and agitation arranged in parallel from the upstream side on the outer surface of the shaft member A flowable raw material that is provided in a mixing pipe line is provided with a blade, a rotation driving means of a shaft member, and at least one additive supply port provided at a portion corresponding to the stirring blade in the shaft member. After being transferred to the additive supply port side through a screw blade that is rotationally driven, the additive material is supplied to the fluid raw material from the additive material supply port, and the fluid raw material and the additive material are rotationally driven with stirring blades Using the first pipe-type mixer and the second pipe-type mixer configured to be stirred and mixed by
A method of changing a flowable raw material containing moisture and solids into a lightweight solidified material while being pumped to a destination;
(A) Adjusting the specific gravity of the fluid raw material by adding or removing moisture,
(D1) The flowable raw material adjusted in specific gravity is supplied into the mixing pipe of the first pipe-type mixer in a non-pressure-feed state, and the supplied flowable raw material is fluidized by screw blades that are rotationally driven. The raw material is transferred to the downstream side with an extrusion amount that is greater than the supply amount per unit time, and the solidified material is supplied from the additive supply port to the fluid raw material in the transfer process, and the fluid raw material and the solidified material are driven to rotate. Stirring and mixing with a stirring blade,
(D2) The fluid raw material to which the solidifying material is added is pumped through the mixing pipe of the second pipe-type mixer by a pump and is rectified by screw blades that are rotationally driven in the pumping process. After that, the lightening material is supplied from the additive supply port, and the flowable raw material and the lightening material added with the solidifying material are stirred and mixed by a stirring blade that is rotationally driven.
A method for producing a lightweight solidified material. The fluid material adjusted in specific gravity is stored in a hopper, the fluid material in the hopper is cut out by a quantitative feeder, and supplied to an upstream supply unit of the first pipe-type mixer. 8. A method for producing a lightweight solidified material according to 7. The fluid raw material supply port is provided at a portion corresponding to the upstream supply portion of the shaft-type mixer shaft member, and the fluid raw material is supplied into the mixing pipe line through the supply port. 6. The method for producing a lightweight solidified material according to any one of 5 above. Some or all of the downstream side of the stirring blade in the mixing pipe of the conduit type mixer, is positioned on the upper side than the screw vane and the agitating blade portions corresponding to the downstream side portion of at least the screw vane, flow The manufacturing method of the light-weight solidified material of any one of Claims 1-8 which always fills a property raw material, an additive, and those mixtures, and performs the said stirring mixing. A cover member is provided on the front side in the shaft member rotation direction of the additive material supply port in the shaft type mixer of the pipe-type mixer, and the cover member is rotated along with the shaft member to push the agitated material and added to the additive material supply port position. The manufacturing method of the lightweight solidification material of any one of Claims 1-9 which forms the supply space of a material. The pipe-type mixer has, as the stirring blade, a multi-function blade having a stirring action and a mixing target transfer action and a single-function blade having only a stirring action, and these follow a spiral direction centering on the shaft member. The method for producing a lightweight solidified material according to any one of claims 1 to 10, which is provided in an alternate arrangement in which one or more single-function blades are interposed every other multifunction blade. The stirring blades of the pipe-type mixer have an elongated flat plate shape, and a plurality of stirring blades are arranged with a phase interval of 90 degrees or 60 degrees along a spiral direction centering on the shaft member. 11. A method for producing a lightweight solidified material according to any one of 11 above. The screw blades of the pipeline mixer are formed so that the number of turns is 1 to 3, and the pitch is 0.4 to 0.8 times the diameter of the mixing tube,
The stirring blade of the pipe-type mixer has a pitch of 1 pitch along the spiral direction around the shaft member. With 5 to 15 pitches, with an interval of 4 to 6
When the diameters of the screw blade and the stirring blade are d, the stirring and mixing is performed with the shaft member having a rotational speed of 150 to 200 / πd (rpm) and a material flow velocity v in the mixing pipe of 10 to 50 m / min. The manufacturing method of the lightweight solidification material of any one of Claims 1-12 which performs. While supplying the powder solidified material by dropping, supplying liquid in a waterfall shape so as to sandwich or narrow the powder solidified material from the surroundings to the falling powder solidified material, The liquid mixture is combined, and the combined powder solidified material and the liquid are stirred and mixed, and then the stirred mixture is used as a solidified material to be added by the pipe-type mixer. The manufacturing method of the lightweight solidification material of item. While the liquid is swirling down, the solidified solid material is dropped into the swirling portion, the granular material and the liquid are merged, the mixed solidified material and the liquid are stirred and mixed, and then this stirred mixture The manufacturing method of the lightweight solidification material of any one of Claims 1-13 used as a solidification material added with the said pipe line type mixer. In adjusting the specific gravity of (A), a flowable raw material containing moisture and solid content is introduced into a specific gravity adjustment tank, and the volume and weight of the flowable raw material in the specific gravity adjustment tank are measured, and based on these measurement results The specific gravity is calculated, and water is added to the specific gravity adjustment tank or water is discharged from the specific gravity adjustment tank so that the fluid raw material in the specific gravity adjustment tank has a predetermined specific gravity according to the specific gravity measurement result. The manufacturing method of the lightweight solidification material of any one of Claims 1-15 made. The method for producing a lightweight solidified material according to claim 16, wherein, when water is discharged from the specific gravity adjusting tank, the supernatant water of the fluid raw material stored in the specific gravity adjusting tank is sucked and discharged. 18. The method for producing a lightweight solidified material according to claim 16, wherein, when water is discharged from the specific gravity adjusting tank, the water of the fluid material stored in the specific gravity adjusting tank is sucked and drained through a filter medium. The lightweight solidified material production according to any one of claims 16 to 19, wherein the fluidity material adjusted in specific gravity is stirred and mixed, and then the solidification material and the lightening material are added by the pipeline mixer. Method.

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