JP3911878B2 - Dehydration drying apparatus and waste water treatment apparatus using the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to a dehydrating and drying apparatus for separating solids from a slurry and drying the solids, and a wastewater treatment apparatus using the same, and in particular, pulverizing straw discharged in a kitchen for home use or business use. The present invention relates to a soot processing device for dewatering and drying a pulverized product and purifying waste water.
[0002]
[Prior art]
  As a dehydrating device for dewatering coarse solids such as pulverized solids and fine slurries such as surplus sludge generated in a wastewater treatment device, for example, those described in Japanese Utility Model Publication No. 55-84156 are known. ing.
[0003]
  The dehydrator includes a non-perforated cylindrical body having a top plate and a bottom plate and rotatably provided around an axis, a perforated cylindrical body provided concentrically within the non-perforated cylinder, and a non-perforated cylinder. A coarse solid material discharge port formed at a position radially inward from the perforated cylinder in the bottom plate of the body, an opening formed in the center of the top plate of the non-porous cylinder, and a stock solution supply pipe inserted into the opening And a scraper that scrapes off coarse solids on the inner peripheral surface of the perforated cylinder, and a drawing tube that extracts fine solids on the inner peripheral surface of the non-perforated cylinder.
[0004]
  In such a dehydrator, when a slurry containing coarse solids is introduced from the stock solution supply pipe, the slurry receives centrifugal force and moves to the inner peripheral surface of the perforated cylinder, where the coarse solids are captured. Collected and centrifugal dehydrated. The fine slurry that has passed without being collected by the perforated cylinder reaches the non-perforated cylinder, where it is concentrated by centrifugal force with a greater centrifugal force than the perforated cylinder. The fine slurry separation liquid overflows from the opening formed above the non-porous cylinder, is collected by the casing, and is discharged from the discharge port. On the other hand, the cake of fine slurry concentrated and accumulated on the inner peripheral surface of the non-porous cylinder is discharged to the outside through a drawing tube. The coarse solid material accumulated on the inner peripheral surface of the perforated cylinder is scraped off by a scraper after slightly rotating if necessary, and the coarse solid discharge port provided at the bottom of the perforated cylinder Is discharged to the outside.
[0005]
  In addition, as a dredging device, a dredging device that grinds dredging in a household or commercial kitchen with a grinder such as a disposer, and drains and purifies the grinded pulverized material without depending on sewerage treatment facilities. However, many have been proposed including those described in, for example, Japanese Patent Application Laid-Open No. 62-171793.
[0006]
  In any of these soot processing devices, the soot is pulverized by a soot smashing device such as a disposer, and the pulverized slag is introduced into a wastewater purification device that performs biological treatment such as an activated sludge method together with kitchen wastewater. The pulverized material and organic matter in the waste water are oxidized and decomposed, and the treated water is discharged to sewers and the like.
[0007]
  However, in these dredging devices, not only wastewater that is a liquid component, but also solid waste (organic matter) that is pulverized solid matter is introduced into the wastewater purification device. In the same way that the facility is overloaded, the waste water purification device becomes overloaded and cannot completely oxidize and decompose this solid component. And the solid component which was not oxidatively decomposed deposited in the waste water purification apparatus, and as a result, there was a problem that a large amount of excess sludge was generated. In order to avoid this, a large drainage purification device is required, and a large installation area is required for installation, so it is difficult to adopt this method in ordinary households.
[0008]
  Further, in this soot treatment apparatus, there is a problem that maintenance and management are complicated and difficult to use because it is necessary to periodically extract the accumulated solid components and excess sludge.
[0009]
  Therefore, the present inventors have proposed the following technique prior to the present invention as an improvement of such problems. Hereinafter, the soot treating apparatus examined by the present inventors will be described in detail with reference to the drawings.
[0010]
  FIG. 4 is a schematic view showing the overall configuration of the soot treating apparatus examined by the present inventors, and FIG. 5 is a cross-sectional view showing a drum screen in the soot treating apparatus of FIG.
[0011]
  In FIG. 4, the disposer 1 constituting a part of the koji pulverizing apparatus is attached under the kitchen sink and crushes the introduced koji. In addition, miscellaneous things other than garbage may be contained in the basket. The disposer 1 is provided with a rotating hammer and a fixed blade, and the thrown pestle is crushed with the hammer and the fixed blade.
[0012]
  The dehydrating and drying device 2c crushes the disperser 1 and, after temporarily storing in the separation tank 15 through the disposer pipe 10, sends the crushed pulverized product by centrifugal dehydration and performs a drying process. The waste water purification device 3c purifies the waste water discharged from the dehydration drying device 2c by biological treatment such as an activated sludge method. The biological treatment tank 31 performs biological treatment and the biological treatment tank 31 purifies the waste water. And a sedimentation separation tank 32 that precipitates and separates suspended solids (SS) such as excess sludge from the treated water.
[0013]
  As shown in FIGS. 4 and 5, the dehydrating / drying apparatus 2c includes a drum screen 4b having a large number of small holes 5 for dehydration on the peripheral surface, a drive unit 6 such as a motor for rotating the drum screen 4b, A heating unit 7 for drying the processed product in the drum screen 4b, a discharge unit 8b serving as a passage for discharging the water discharged from the dewatering small holes 5 to the drainage purification device 3c, and the dried processed product And a storage unit 9 for temporarily storing the.
[0014]
  Here, it is appropriate to use, for example, an electric heater as the heating unit 7 in consideration of ease of control. Further, as shown in the figure, a blower 33 is provided in the vicinity of the heating unit 7 and the hot air is blown uniformly into the processed product inside the drum screen 4b to dry it. It is suitable to be able to.
[0015]
  By the way, it is desirable that the size of the small hole 5 for dehydration of the drum screen 4b is set to a diameter of about 1 mm. This is because the size of the pulverized koji pulverized by the disposer 1 is spread over a fairly wide range, but the size (particle size) distribution is relatively high in the range of 1 mm to 3 mm. If the diameter of the dewatering small holes 5 is too small, for example, less than 1 mm, the tendency of the pulverized pulverized material to clog the small holes 5 for dehydration becomes strong, and if it is larger than 1 mm, the amount of solid components passing through increases. Since the separation efficiency of a thing falls, neither is preferable.
[0016]
  In order to introduce the sludge pulverized material 20a precipitated in the separation tank 15 or the excess sludge 21a precipitated in the waste water purification apparatus 3c into the drum screen 4b of the dehydration drying apparatus 2c, the separation tank 15, the waste water purification apparatus 3c, The slurry introduction pipe line 18 which connects these is installed. A flow rate adjusting means 12 is attached to the slurry introduction pipe 18 for controlling the amount of the pulverized material 20a and excess sludge 21a introduced into the drum screen 4b. The flow rate adjusting means 12 controls the output of a combination of a pump and a valve or a pump alone. A switching valve 19 for switching the flow path between the pulverized material 20a introduced into the drum screen 4b and the excess sludge 21a is attached to the connecting portion between the separation tank 15 and the waste water purification device 3c of the slurry introduction pipe 18. It has been. And the control part 13c which performs operation | movement control of the flow volume adjustment means 12, the switching valve 19, the drive part 6, and the heating part 7 is provided.
[0017]
  Next, the wrinkle processing by the wrinkle processing apparatus having such a structure will be described.
[0018]
  The soot discharged from the kitchen sink is pulverized by the disposer 1 and introduced into the separation tank 15 through the disposer pipe 10 together with the waste water used in the kitchen sink.
[0019]
  The waste water separated in the separation tank 15 is introduced into the waste water purification device 3c from the separation water conveyance line 16, and the organic matter is oxidized and decomposed by microorganisms in the biological treatment tank 31 of the waste water purification device 3c to be purified. The treated water is discharged from the drain pipe 14b to the sewer after the suspended solids (SS) are removed in the precipitation separation tank 32. When a predetermined amount of the pulverized material 20a settled in the separation tank 15 is collected by separating the waste water in this way, the switching valve 19 is operated by the control unit 13c to switch the flow path, and the flow rate adjusting means 12 is operated. The soot pulverized product 20a precipitated in the separation tank 15 is introduced into the drum screen 4b.
[0020]
  When the crushed material 20a is introduced into the drum screen 4b, the control unit 13c rotates the drum screen 4b via the drive unit 6 to centrifugally dehydrate the crushed material 20a, and as shown in FIG. An adhesion layer 20b of the crushed material is formed on the inner surface of 4b.
[0021]
  If the adhesion layer 20b is formed, the switching valve 19 is operated by the control unit 13c to switch the flow path, and the surplus sludge 21a that has settled in the waste water purification device 3c by the operation of the flow rate adjusting unit 12 is contained in the drum screen 4b. To be introduced. When the excess sludge 21 is introduced, the drum screen 4b is rotated and centrifugally dehydrated. Thereby, the surplus sludge 21a is filtered by the adhesion layer 20b of the already crushed soot. Then, when the filtration progresses and the solid component of the excess sludge 21a is deposited on the adhesion layer 20b, the solid-liquid ring layer in which the solid-liquid separation of the excess sludge 21a has progressed on the inner peripheral surface of the adhesion layer 20b as shown in FIG. 21b is formed. Here, most of the excess sludge 21a is fine particles of 500 μm or less and normally passes through the small holes 5 for dehydration having a diameter of about 1 mm of the drum screen 4b and cannot be filtered. Filtration is possible by using the adhesion layer 20b as a filtration layer.
[0022]
  The water discharged from the dewatering small holes 5 of the drum screen 4b is introduced into the waste water purification device 3c from the discharge portion 8b, and the organic matter is oxidized and decomposed by microorganisms in the biological treatment tank 31 of the waste water purification device 3c to be purified. The treated water is discharged from the drain pipe 14b to the sewer after the suspended solids (SS) are removed in the precipitation separation tank 32. For example, microorganisms belonging to a group of aerobic microorganisms represented by the genus Bacillus can be applied to this microorganism.
[0023]
  The adhering layer 20b of the soot pulverized product and the excess sludge 21a trapped therein are dried by the heating unit 7 operated by the control unit 13c and temporarily stored in the storage unit 9.
[0024]
[Problem to be Solved by the Invention]
  However, in the soot treatment device as described above, coarse solids such as soot pulverized matter and fine slurry such as excess sludge generated in the waste water purification device are separately collected. This increases the running cost. In addition, a scraping device and a pulling device for handling coarse solids and slurries are separately required, which increases the cost of the device.
[0025]
  Further, fine solids are easily clogged in the small holes for dehydration. Here, since it is difficult to eliminate clogging only with the scraping device, maintenance is indispensable to prevent clogging. Then, if it is attempted to eliminate clogging without such maintenance, the mechanism for preventing clogging becomes complicated and the cost of the apparatus increases.
[0026]
  Furthermore, since the cake of fine slurry concentrated and accumulated on the inner peripheral surface of the non-porous cylinder is discharged from the drawing tube, a conveying means such as a pump is required, which increases the cost of the apparatus.
[0027]
  Furthermore, in the soot treatment apparatus as described above, a sedimentation separation tank is required in the waste water purification apparatus to remove the suspended solids (SS) of the treated water, and it is difficult to make the apparatus compact.
[0028]
  And since the water quality control of discharged water cannot be performed, not only maintenance is required, but also a safety margin for waste water treatment must be taken, and the waste water purification device becomes large.
[0029]
  Then, an object of this invention is to provide the dehydration drying apparatus which can capture | acquire solid content with a large particle size and fine particle | grains simultaneously, and a waste water treatment apparatus using the same.
[0030]
  Another object of the present invention is to provide a dehydrating and drying apparatus capable of preventing clogging of the small holes for dehydration without providing a clogging prevention mechanism and a waste water treatment apparatus using the same.
[0031]
  Furthermore, an object of the present invention is to provide a dehydrating and drying apparatus capable of downsizing the apparatus and a waste water treatment apparatus using the same.
[0032]
  And an object of this invention is to provide the dehydration drying apparatus which can obtain clear separation water, and a waste water treatment apparatus using the same.
[0033]
[Means for Solving the Problems]
  To solve this problemThe wastewater treatment apparatus of the present invention isA small hole for dehydration is opened on the side surface, and the introduced slurry is accommodated and centrifuged to form an adhesion layer having a large solid particle size in the slurry on the inner wall surface of the side surface. A drum screen that filters the particle-containing slurry through an adhesion layer, a drive unit that rotates the drum screen, and an outer periphery of the drum screenIt is provided and the fine particles that have passed through the drum screen are centrifuged to discharge clear separated water, and the solid content of the fine particles that have passed through the drum screen is recovered.A dehydrating and drying apparatus that includes a separation drum and a heating unit that evaporates moisture in an adhesion layer formed by filtration, and dehydrates and dries organic solids in wastewater containing organic solids.And a wastewater purification device that purifies the wastewater discharged from the dehydration drying device, and a dehydration drying device that connects the dewatering drying device and the wastewater purification device, and treats the treated water and excess sludge purified by the wastewater purification device. An introduction path to be introduced into the drain, a discharge pipe for discharging the clear separated water discharged from the opening to the outside, and a discharge section for returning the residual water containing the solid content of fine particles discharged from the discharge port to the outside of the waste water purification apparatus. And a water quality sensor for detecting the quality of the discharged water is provided in the discharge pipe.
[0034]
  As a result, since the fine particle-containing slurry is filtered through a solid content adhesion layer having a large particle size, the solid content having a large particle size and the fine particles are simultaneously produced even if the pore diameter of the small holes for dewatering of the drum screen is increased. It becomes possible to capture. In addition, since the hole diameter of the small holes for dewatering of the drum screen can be set to such an extent that solids having a large particle diameter can be captured, clogging of the small holes for dewatering can be prevented without providing a clogging prevention mechanism. It becomes possible. Furthermore, since fine particles that have passed through the drum screen are centrifuged by a separation drum, it becomes possible to obtain clear separated water, and suspended solids in the treated water are removed by centrifugation, so drainage purification. It is not necessary to provide a precipitation separation tank in the apparatus, and the apparatus can be made compact.
[0035]
  Also, since the residual water containing the fine particles of solid particles that passed through the drum screen is discharged from the discharge port on the bottom surface of the separation drum, there is no need to provide a drawing tube, and the apparatus can be made compact. It has the effect of becoming.
[0036]
  In addition, since the suspended solids of the treated water are removed by centrifugation, there is no need to provide a sedimentation separation tank in the waste water purification apparatus, and the apparatus can be made compact.
[0037]
  Furthermore, since the water quality sensor for detecting the quality of the discharged water is provided in the discharge pipe, the quality of the discharged water can be detected, so that the quality of the discharged water can be kept below a predetermined reference value.
[0038]
DETAILED DESCRIPTION OF THE INVENTION
  According to the first aspect of the present invention, a small hole for dehydration is opened in the side surface portion, the introduced slurry is accommodated, centrifuged and dehydrated, and the solid content having a large particle size in the slurry is formed on the inner wall surface of the side surface portion. A drum screen for filtering the fine particle-containing slurry to be introduced through the adhesion layer, a drive unit for rotating the drum screen, and the fine particles that pass through the drum screen. Centrifugation discharges the clear separated water and removes the solid content of fine particles that passed through the drum screen.The upper surface provided with an opening for discharging the clear separated water to be collected is provided at a predetermined inner diameter position, and the discharge port for discharging the residual water containing solids of fine particles that have passed through the drum screen is more than the opening. With a bottom surface provided at a small inner diameter positionA separation drum and a heating unit that evaporates the water in the adhesion layer formed by filtration.A dehydration drying device for dehydrating and drying organic solids of wastewater containing organic solids, a drainage purification device for purifying wastewater discharged from the dehydration drying device, and a dehydration drying device and a wastewater purification device. Between the wastewater purification device and the treated water and surplus sludge introduced into the dehydration drying device, the discharge pipe for discharging the clear separated water discharged from the opening to the outside, and the discharge port The wastewater treatment apparatus includes a discharge unit that returns the residual water containing the solid content of the discharged fine particles to the outside of the wastewater purification apparatus, and is provided with a water quality sensor that detects the quality of the discharged water in the discharge pipe.
[0039]
  Since the slurry containing fine particles is filtered through a large solid content adhesion layer, even if the pore diameter of the small holes for dewatering the drum screen is increased, the large solid content and fine particles can be captured simultaneously. Has the effect of becoming possible. In addition, since the hole diameter of the small holes for dewatering of the drum screen can be set to such an extent that solids having a large particle diameter can be captured, clogging of the small holes for dewatering can be prevented without providing a clogging prevention mechanism. It has the effect of becoming possible. Furthermore, since fine particles that have passed through the drum screen are centrifuged by the separation drum, there is an effect that clear separated water can be obtained.
[0040]
  Also, since the residual water containing the fine particles of solid particles that passed through the drum screen is discharged from the discharge port on the bottom surface of the separation drum, there is no need to provide a drawing tube, and the apparatus can be made compact. It has the effect of becoming.
[0041]
  In addition, since the suspended solids of the treated water are removed by centrifugation, there is no need to provide a sedimentation separation tank in the waste water purification apparatus, and the apparatus can be made compact.
[0042]
    Furthermore, since the water quality sensor that detects the quality of the discharged water is provided in the discharge pipe, the quality of the discharged water can be detected, so that the quality of the discharged water can be kept below a predetermined reference value. Have
[0043]
  Of the present inventionClaim 2The invention described in claim 8 is the waste water treatment apparatus according to the invention described in claim 8, comprising a control unit that controls the operation of the drive unit or the clutch by the detection signal from the water quality sensor, and the rotation of the centrifugal separation is performed by the quality of the discharged water. It is possible to control the discharge of the treated water by controlling the water.
[0044]
  Of the present inventionClaim 3In the invention described in Item 9, in the invention described in Item 9, when the signal from the water quality sensor reaches a predetermined value or more, the control unit operates the driving unit to reduce the rotational speed of the drum screen to the predetermined rotational speed. This is a wastewater treatment device that lowers the flow rate of the centrifugal separation when the water quality of the effluent water exceeds a predetermined reference value, so that treated water with poor water quality is not discharged.
[0045]
  Of the present inventionClaim 4The invention described inClaim 2In the described invention, the control unit is a wastewater treatment device that operates the clutch to stop the transmission of power from the drum screen to the separation drum when the signal from the water quality sensor reaches a predetermined value or more. Centrifugation is stopped when the water quality exceeds a predetermined reference value, so that treated water having poor water quality is not discharged.
[0046]
  Of the present inventionClaim 5The invention described inClaims 1-4In the invention according to any one of the above, the waste water purification apparatus is provided with air supply means for supplying air to the waste water, and the control unit controls the operation of the air supply means by a detection signal from the water quality sensor Since the air supply amount is controlled by the quality of the discharged water, the biological treatment state in the waste water purification apparatus can be kept constant.
[0047]
  Of the present inventionClaim 6The invention described inClaim 5In the invention described in the above, the control unit is a wastewater treatment device that operates the air supply means to increase the air supply amount to the wastewater of the wastewater purification device when the signal from the water quality sensor reaches a predetermined value or more, When the quality of the discharged water reaches a certain level or more, the amount of air supplied to the wastewater of the wastewater purification device increases, so that the state of biological treatment in the wastewater purification device can be kept good.
[0048]
  Hereinafter, the present inventionReference examples andEmbodiments will be described with reference to FIGS. 1 to 3. In these drawings, the same members are denoted by the same reference numerals, and redundant description is omitted.
[0049]
  (Reference Example 1)
  FIG. 1 illustrates the present invention.Reference example 1It is the schematic which shows the whole structure of the dehydration drying apparatus.
[0050]
  As shown in FIG. 1, the dehydrating and drying apparatus 2a is provided with a cylindrical drum screen 4a for centrifugally dehydrating the charged slurry. Similarly, the cylindrical separation drum 40 is disposed coaxially with the drum screen 4a so as to surround the drum screen 4a with a predetermined distance from the drum screen 4a.
[0051]
  A number of dewatering small holes 5 are opened in the side surface of the drum screen 4a. In addition, an opening 24 is formed in the center of the bottom surface of the inclined drum screen 4a that descends inward, and the slurry dehydrated and dried by the drum screen 4a is dropped around the opening 24. A discharge port 23 for draining excess slurry is formed. Here, it is desirable to set the dewatering small holes 5 on the side surface to a diameter of about 1 mm. Further, the opening 24 is larger than the dried shrinkage of the slurry that has been dehydrated and dried by the drum screen 4a. Furthermore, the discharge port 23 may form a circular small hole concentrically, or may form a concentric long hole slit.
[0052]
  The upper surface portion 41 of the separation drum 40 is fixed to the drum screen 4a, and the upper surface portion 41 is formed with an opening 43 through which the centrifuged clear separated water is discharged. In addition, the bottom surface portion 42 has an inclination that descends inward, has an inner diameter smaller than that of the opening 43, and discharges residual water containing solids of fine particles that have passed through the drum screen 4a. An outlet 44 is formed.
[0053]
  In order to discharge the separated water discharged from the opening 43 to the outside of the dehydrating and drying apparatus 2a, a discharge pipe 14a is attached to the separation drum 40. A partition plate 45 is attached to the outer surface portion of the separation drum 40 so that the separated water does not fall on the way from the opening 43 to the discharge pipe 14a. Further, the separation drum 40 is provided with a discharge portion 8a for discharging the residual water discharged from the discharge port 44 to the outside of the dehydrating and drying apparatus 2a.
[0054]
  The drum screen 4a is rotatably attached to the dehydrating / drying device 2a by a bearing or the like. A drive unit 6 such as a motor is provided on the side of the drum screen 4a, and a belt 6a is stretched between the drum screen 4a and the drive unit 6. Therefore, when the drive unit 6 rotates, the drum screen 4a and the separation drum 40 fixed thereto rotate. The drum screen 4a and the separation drum 40 may be rotated by chain drive or gear drive instead of such belt drive. Further, a rotor may be attached to the drum screen 4a or the separation drum 40, and the external stator may be energized and driven.
[0055]
  A tip is opened toward the inside of the drum screen 4a, and a slurry introduction pipe 18 for introducing the slurry into the drum screen 4a is attached. In addition, a plate-like guide portion 22 is installed at a predetermined interval from the tip of the slurry introduction pipe 18 to diffuse and guide the slurry discharged from the slurry introduction pipe 18 to the upper side of the drum screen 4a. Yes.
[0056]
  Below the opening 24 of the drum screen 4a, a storage unit 9 is provided for temporarily storing the dried shrinkage of the dropped slurry.
[0057]
  As shown in the figure, the dehydrating and drying apparatus 2a is provided with a heating unit 7 which is a heat source for heating and drying the slurry captured and dehydrated by the drum screen 4a. And in order to send the heat which generate | occur | produced in the heating part 7 to the drum screen 4a, the ventilation means 34 is installed. For the heating unit 7, for example, a burner, a heater using nichrome wire, a magnetron for generating a high frequency, or the like can be applied. Alternatively, the drum screen 4a may be directly heated by an electrically induced eddy current.
[0058]
  Next, a series of operations of the dehydration drying apparatus of this reference example will be described.
[0059]
  The drum screen 4a is rotated by the drive unit 6, and a predetermined amount of slurry containing solid matter having a large particle size such as crushed material is introduced into the drum screen 4a. Then, the introduced slurry is guided to diffuse above the side surface portion of the drum screen 4a by the guiding portion 22 and centrifugally dehydrated. And the adhesion layer 20b which consists of solid content with a large particle size in a slurry is formed in the inner wall face of the drum screen 4a. It is desirable that the adhesion layer 20b has a thickness of about 3 mm to 20 mm. Since the slurry immediately reaches the inner wall surface of the drum screen 4a by centrifugal force, it is not discharged from the opening 24 on the bottom surface.
[0060]
  By draining the slurry by centrifugal dewatering, the wastewater containing the solid content of fine particles that has passed through the dewatering small holes 5 on the side surface of the drum screen 4 a is accumulated in a ring shape on the inner wall surface of the separation drum 40. This drainage is discharged from the outlet 44 of the inclined bottom surface portion 42 when the rotation of the drum screen 4a is stopped after the adhesion layer 20b is formed and the rotation of the separation drum 40 connected thereto is also stopped. It is discharged out of the dehydrating and drying apparatus 2a through the section 8a.
[0061]
  By the way, the predetermined rotation speed N (rpm) for rotating the drum screen 4a is equal to or higher than the predetermined rotation speed at which the solid matter contained in the slurry can form the substantially uniform adhesion layer 20b on the inner wall surface of the drum screen 4a. The number of rotations must be However, if the rotational speed is too high, the centrifugal force becomes too strong and a part of the adhesion layer 20b is released to the outside of the drum screen 4a. Therefore, the rotational speed must be equal to or lower than such rotational speed. Therefore, there is an upper limit and a lower limit for the rotational speed N of the drum screen 4a.
[0062]
  Here, the rotational speed N is a function of r when the radius of the drum screen 4a is r (m), and is 200 / r.^1/2<N <1200 / r^1/2The rotation speed is in a range that satisfies the above. That is, the rotational speed is 200 / r.^1/2In the following, the adhesion layer 20
b is not good, 1200 / r^1/2If it becomes above, it mixes with drainage and is for dehydration.
This is not appropriate because the solids passing through the small holes 5 increase.
[0063]
  The drum screen 4a is rotated at such a predetermined rotational speed between the upper limit and the lower limit until the liquid discharged from the large number of dewatering small holes 5 has a negligible flow rate. Then, a cylindrical adhesion layer 20b having a substantially uniform thickness and height is formed on the inner wall surface of the drum screen 4a.
[0064]
  When the adhesion layer 20b is thus formed, the drum screen 4a is rotated again by the drive unit 6, and a predetermined amount of slurry containing fine particles such as excess sludge is introduced into the drum screen 4a. And this slurry is filtered with the adhesion layer 20b. The slurry containing fine particles usually passes through the small holes 5 for dehydration having a diameter of about 1 mm of the drum screen 4a and cannot be filtered, but can be filtered by using the adhesion layer 20b as a filtration layer. It will be.
[0065]
  When the filtration proceeds and the solid component of the slurry containing fine particles is deposited inside the adhesion layer 20b, solid-liquid separation of the slurry containing fine particles is performed on the inner peripheral surface of the adhesion layer 20b as shown in FIG. The advanced solid-liquid ring layer 21b is formed.
[0066]
  When the solid-liquid ring layer 21 b has a predetermined inner diameter, the fine particle-containing slurry is discharged from the discharge port 23. At this time, since clear water located inside the solid-liquid ring layer 21b is discharged from the discharge port 23 by centrifugation, the filtration dehydration time can be shortened while maintaining the separation efficiency in a good state.
[0067]
  The water containing the solid content of the fine particles discharged from the dewatering small holes 5 and the discharge port 23 on the side surface of the drum screen 4 a is accumulated in a ring shape on the inner wall surface of the separation drum 40. And when this ring layer becomes a predetermined internal diameter, the water which comprises a ring layer will be discharged | emitted from the opening 43 of the upper surface part 41. FIG. At this time, since the clear separated water located inside the ring layer is discharged from the opening 43 by centrifugation, the separated water from which the suspended solids (SS) is removed can be obtained. The separated water discharged from the opening 43 is collected and discharged out of the dehydrating / drying apparatus 2a through the discharge pipe 14a.
[0068]
  When the introduction of the slurry containing fine particles is completed and the dehydration detection means (not shown) detects that the dehydration is almost completed, the rotation of the drum screen 4a and the separation drum 40 connected thereto is stopped. As a result, the residual water containing the fine particle solids in the separation drum 40 is discharged from the discharge port 44 of the inclined bottom surface portion 42 and discharged from the discharge portion 8a to the outside of the dehydration drying apparatus 2a.
[0069]
  The adhering layer 20 b and the solid-liquid ring layer 21 b made of the fine solid content captured by the adhering layer 20 b are dried by the heating unit 7. The final purpose of the drying process is to dry and solidify the water-containing solid component remaining in the drum screen 4a, and in the course of the drying process, a cylindrical shape is formed in the drum screen 4a. It is also intended to facilitate the separation from the drum screen 4a by reducing the size while maintaining the shape.
[0070]
  When the predetermined time has elapsed, the cylindrical dry shrinkage has an outer diameter that is smaller than the inner diameter of the opening 24 at the bottom of the drum screen 4a, falls from the opening 24, and is stored in the storage unit 9. The
[0071]
  As described above, according to this reference example, the slurry containing fine particles is filtered by the solid-adhesion layer 20b having a large particle size, so that the pore size of the dehydrating small holes 5 is changed to a solid material having a large particle size. Even with the drum screen 4a that can be captured, coarse solids and fine particles can be captured simultaneously.
[0072]
  Further, since the hole diameter of the dewatering small holes 5 can be set to such an extent that a solid substance having a large particle diameter can be captured, it is possible to prevent the dewatering small holes 5 from being clogged without providing a clogging prevention mechanism. become.
[0073]
  Furthermore, since the adhesion layer 20b and the solid-liquid ring layer 21b are dried and contracted and dropped from the opening 24 of the drum screen 4a and stored in the storage unit 9, the transport for transporting the captured fine particles is performed. There is no need to provide means.
[0074]
  Since the residual water containing the solid content of the fine particles having passed through the drum screen 4a is discharged from the discharge port 44 formed in the bottom surface portion 42 of the separation drum 40, there is no need to provide a drawing tube or the like, and the apparatus is made compact. Can be achieved.
[0075]
  Since the fine particles that have passed through the drum screen 4a are centrifuged by the separation drum 40, it becomes possible to obtain clear separated water.
[0076]
  Since the clear water located inside the solid-liquid ring layer 21b formed by the slurry containing fine particles is discharged from the discharge port 43, the filtration dehydration time can be shortened.
[0077]
  Since the separation drum 40 and the drum screen 4a are driven by the same drive unit 6, the apparatus can be made compact and the cost of the apparatus can be reduced.
[0078]
  (Reference example 2)
  FIG. 2 illustrates the present invention.Reference example 2It is the schematic which shows the whole structure of the waste water treatment equipment in. In addition,Reference example 2The dehydrating and drying apparatus 2a used inReference example 1This is substantially the same as that described in.
[0079]
  In FIG. 2, a disposer (slag crusher) 1 constituting a part of the crusher is attached, for example, under a sink in a kitchen, and crushes the introduced soot. In addition, miscellaneous things other than garbage may be contained in the basket. Here, the disposer 1 like this reference example does not need to be installed in the waste water treatment apparatus in the present invention.
[0080]
  The disposer 1 is provided with a rotating hammer and a fixed blade, and the thrown pestle is crushed with the hammer and the fixed blade. Further, the dehydrating and drying apparatus 2a performs a dehydrating process by centrifugally dewatering the crushed material 20a pulverized by the disposer 1.
[0081]
  Here, the waste water treatment apparatus is provided with a separation tank 15 for temporarily storing the pulverized material 20a pulverized by the disposer 1. The disposer 1 and the separation tank 15 are communicated with each other through the disposer pipe 10, and the crushed material 20 a is sent from the disposer 1 to the separation tank 15 through the disposer pipe 10. Further, adjacent to the separation tank 15, a waste water purification device 3 a that purifies waste water discharged from the dehydration drying device 2 a by biological treatment such as an activated sludge method is installed.
[0082]
  The separation tank 15 and the waste water purification device 3a are communicated with each other by a separated water conveyance pipe line 16. And the waste_water | drain isolate | separated by the separation tank 15 is introduce | transduced into the waste water purification apparatus 3a from this separated water conveyance pipe line 16. FIG.
[0083]
  Further, in the wastewater treatment apparatus, the slurry introduction pipe 18 for selectively introducing the pulverized pulverized material 20a stored in the separation tank 15 and the excess sludge 21a precipitated in the wastewater purification apparatus 3a into the drum screen 4a of the dehydration drying apparatus 2a. Is provided. A flow rate adjusting means 12 is attached to the slurry introduction pipe 18 to control the amount of the pulverized material 20a and excess sludge 21a introduced into the drum screen 4a. The flow rate adjusting means 12 controls the output of a combination of a pump and a valve, or a pump. Further, a switching valve 19 for switching the flow path between the pulverized material 20a introduced into the drum screen 4a and the excess sludge 21a is attached to the connection portion between the separation tank 15 and the waste water purification device 3a of the slurry introduction pipe line 18. It has been. And the control part 13a which performs operation | movement control of the flow volume adjusting means 12, the switching valve 19, the drive part 6 of the dehydration drying apparatus 2a, and the heating part 7 is provided.
[0084]
  Next, the processing of soot by the wastewater treatment apparatus of this reference example will be described.
[0085]
  The soot discharged from the kitchen sink is pulverized by the disposer 1 and introduced into the separation tank 15 through the disposer pipe 10 together with the waste water used in the kitchen sink.
[0086]
  The waste water separated in the separation tank 15 is introduced into the waste water purification device 3a from the separated water conveyance pipe 16, where organic matter is oxidized and decomposed by microorganisms and purified. When a predetermined amount of the pulverized soot 20a settled in the separation tank 15 is collected by separating the drainage in this way, the drive unit 6 is operated by the control unit 13a to rotate the drum screen 4a.
[0087]
  Next, the switching valve 19 is operated by the control unit 13a to switch the flow path, and the flow rate adjusting means 12 is operated to introduce the crushed material 20a settled in the separation tank 15 into the drum screen 4a. The introduced pulverized crushed material 20a is diffused and guided to the upper side of the side surface of the drum screen 4a by the guiding portion 22 and centrifugally dehydrated. And the adhesion layer 20b of the solid content with a large particle size in the soot ground material 20a is formed in the inner wall surface of the drum screen 4a. It is desirable that the adhesion layer 20b has a thickness of about 3 mm to 20 mm. In addition, since the pulverized material 20a reaches the inner wall surface of the drum screen 4a immediately by centrifugal force, it is not discharged from the opening 24 on the bottom surface.
[0088]
  The waste water containing the solid content of fine particles that has passed through the small holes 5 for dehydration on the side surface of the drum screen 4 is collected in a ring shape on the inner wall surface of the separation drum 40 by centrifugally dewatering the crushed material 20a. This drainage is discharged from the outlet 44 of the inclined bottom surface portion 42 when the rotation of the drum screen 4a is stopped after the adhesion layer 20b is formed and the rotation of the separation drum 40 connected thereto is also stopped. It is introduced into the waste water purification device 3a through the section 8a, where organic substances are oxidized and decomposed by microorganisms for purification treatment.
[0089]
  By the way, the predetermined rotation speed N (rpm) for rotating the drum screen 4a is a rotation of a predetermined rotation speed or more at which the crushed material 20a can form a substantially uniform adhesion layer 20b on the inner wall surface of the drum screen 4a. Must be a number. However, if the rotational speed is too high, the centrifugal force becomes too strong and a part of the adhesion layer 20b is released to the outside of the drum screen 4a. Therefore, the rotational speed must be equal to or lower than such rotational speed. Therefore, there is an upper limit and a lower limit for the rotational speed N of the drum screen 4a.
[0090]
  Here, the rotational speed N is a function of r when the radius of the drum screen 4a is r (m), and is 200 / r.^1/2<N <1200 / r^1/2The rotation speed is in a range that satisfies the above. That is, the rotational speed is 200 / r.^1/2In the following, the adhesion layer 20
b is not good, 1200 / r^1/2If it becomes above, it mixes with drainage and is for dehydration.
This is not appropriate because the solids passing through the small holes 5 increase.
[0091]
  The drum screen 4a is rotated at such a predetermined rotational speed between the upper limit and the lower limit until the liquid discharged from the large number of dewatering small holes 5 has a negligible flow rate. Then, a cylindrical adhesion layer 20b having a substantially uniform thickness and height is formed on the inner wall surface of the drum screen 4a.
[0092]
  When the adhesion layer 20b is thus formed, the driving unit 6 is operated again by the control unit 13a to rotate the drum screen 4a. Then, the control unit 13a operates the switching valve 19 to switch the flow path, and operates the flow rate adjusting means 12 to introduce the excess sludge 21a precipitated in the waste water purification device 3 into the drum screen 4a. The surplus sludge 21a is centrifugally dehydrated by the rotation of the drum screen 4a, and is filtered through the already formed soot crushed adhering layer 20b.
[0093]
  Most of the excess sludge 21a is fine particles of 500 μm or less, and usually passes through the dewatering small holes 5 having a diameter of about 1 mm of the drum screen 4b and cannot be filtered. Filtration is possible by using the layer 20b as a filtration layer.
[0094]
  When the filtration proceeds and the solid component of the excess sludge 21a is deposited on the adhesion layer 20b, the solid-liquid ring layer 21b in which the solid-liquid separation of the excess sludge 21a has progressed is formed on the inner peripheral surface of the adhesion layer 20b.
[0095]
  When the solid-liquid ring layer 21b has a predetermined inner diameter, excess sludge 21a is discharged from the discharge port 23. At this time, since clear water located inside the solid-liquid ring layer 21b is discharged from the discharge port 23 by centrifugation, the filtration dehydration time can be shortened while maintaining the separation efficiency in a good state.
[0096]
  The water containing the solid content of the fine particles discharged from the dewatering small holes 5 and the discharge port 23 on the side surface of the drum screen 4 a is accumulated in a ring shape on the inner wall surface of the separation drum 40. And when this ring layer becomes a predetermined internal diameter, the water which comprises a ring layer will be discharged | emitted from the opening 43 of the upper surface part 41. FIG. At this time, since the clear separated water located inside the ring layer is discharged from the opening 43 by centrifugation, the separated water from which the suspended solids (SS) is removed can be obtained. The separated water discharged from the opening 43 is collected and discharged out of the waste water treatment apparatus through the discharge pipe 14a.
[0097]
  When the introduction of the excess sludge 21a is finished and the dewatering detection means (not shown) detects that the dewatering is almost finished, the rotation of the drum screen 4a and the separation drum 40 connected thereto is stopped. Thereby, the residual water containing the fine particle solid content in the separation drum 40 is discharged from the discharge port 44 of the inclined bottom surface portion 42 and returned to the waste water purification device 3a from the discharge portion 8a.
[0098]
  Moreover, the adhesion layer 20b of the pulverized material 20a and the excess sludge 21a trapped therein are dried by the heating unit 7 operated by the control unit 13a. The final purpose of the drying process is to dry and solidify the water-containing solid component remaining in the drum screen 4a, and in the course of the drying process, a cylindrical shape is formed in the drum screen 4a. It is also intended to facilitate the separation from the drum screen 4a by reducing the size while maintaining the shape.
[0099]
  When the predetermined time has elapsed, the cylindrical dry shrinkage has an outer diameter that is smaller than the inner diameter of the opening 24 at the bottom of the drum screen 4a, falls from the opening 24, and is stored in the storage unit 9. The
[0100]
  As described above, according to this reference example, the slurry containing fine particles is filtered by the solid-adhesion layer 20b having a large particle size, so that the pore size of the dehydrating small holes 5 is changed to a solid material having a large particle size. Even with the drum screen 4a that can be captured, coarse solids and fine particles can be captured simultaneously.
[0101]
  Further, since the hole diameter of the dewatering small holes 5 can be set to such an extent that a solid substance having a large particle diameter can be captured, it is possible to prevent the dewatering small holes 5 from being clogged without providing a clogging prevention mechanism. become.
[0102]
  Furthermore, since the adhesion layer 20b and the solid-liquid ring layer 21b are dried and contracted and dropped from the opening 24 of the drum screen 4a and stored in the storage unit 9, the transport for transporting the captured fine particles is performed. There is no need to provide means.
[0103]
  Since the residual water containing the solid content of the fine particles having passed through the drum screen 4a is discharged from the discharge port 44 formed in the bottom surface portion 42 of the separation drum 40, there is no need to provide a drawing tube or the like, and the apparatus is made compact. Can be achieved.
[0104]
  Since the fine particles that have passed through the drum screen 4a are centrifuged by the separation drum 40, it becomes possible to obtain clear separated water.
[0105]
  Since the clear water located inside the solid-liquid ring layer 21b formed by the slurry containing fine particles is discharged from the discharge port 44, it is possible to shorten the filtration dehydration time.
[0106]
  Since the separation drum 40 and the drum screen 4a are driven by the same drive unit 6, it is possible to reduce the size of the device and reduce the cost of the device.
[0107]
  Since suspended solids (SS) of treated water is removed by centrifugation, it is not necessary to provide a sedimentation separation tank in the wastewater purification device 3a, and the wastewater treatment device can be made compact.
[0108]
  Since the rotation of the drum screen 4a is stopped before the treated water purified by the waste water purification device 3a is filtered and centrifuged, the residual water in the drum screen 4a can be discharged.
[0109]
  (Embodiment)
  FIG. 3 illustrates the present invention.EmbodimentIt is the schematic which shows the whole structure of the waste water treatment equipment in.
[0110]
  The waste water treatment apparatus in the present embodiment has been described above.Reference example 2In addition to the waste water treatment device in FIG. 1, the dehydration drying device 2b is provided with a clutch 46 capable of shutting off the power transmitted to the separation drum 40 via the drum screen 4a, and for detecting the quality of the discharged water in the discharge pipe 14a. A water quality sensor 50 is provided. The waste water purification device 3b is provided with air supply means 60 such as an air pump for supplying air to the waste water. The operation of the clutch 46 and the air supply means 60 is controlled by the control unit 13b, and the detection result of the water quality sensor 50 is sent to the control unit 13b.
[0111]
  Next, the process of the soot by the waste water treatment apparatus of this Embodiment is demonstrated.
[0112]
  The soot discharged from the kitchen sink is pulverized by the disposer 1 and introduced into the separation tank 15 through the disposer pipe 10 together with the waste water used in the kitchen sink.
[0113]
  The waste water separated in the separation tank 15 is introduced into the waste water purification device 3b from the separated water conveyance pipe 16, where organic matter is oxidized and decomposed by microorganisms for purification treatment. When a predetermined amount of the pulverized soot 20a settled in the separation tank 15 is collected by separating the drainage in this way, the drive unit 6 is operated by the control unit 13b to rotate the drum screen 4b. At this time, the control unit 13b operates the clutch 46 to cut off the power transmitted from the drum screen 4a to the separation drum 40.
[0114]
  Next, the switching valve 19 is operated by the controller 13b to switch the flow path, and the flow rate adjusting means 12 is operated to introduce the crushed material 20a settled in the separation tank 15 into the drum screen 4a. The introduced pulverized crushed material 20a is diffused and guided to the upper side of the side surface of the drum screen 4a by the guiding portion 22 and centrifugally dehydrated. And the adhesion layer 20b of the solid content with a large particle size in the soot ground material 20a is formed in the inner wall surface of the drum screen 4a. It is desirable that the adhesion layer 20b has a thickness of about 3 mm to 20 mm. In addition, since the pulverized material 20a reaches the inner wall surface of the drum screen 4a immediately by centrifugal force, it is not discharged from the opening 24 on the bottom surface.
[0115]
  The waste water containing the solid content of fine particles that has passed through the small holes 5 for dehydration on the side surface of the drum screen 4a by centrifugal dewatering of the crushed material 20a reaches the inner wall surface of the separation drum 40. Therefore, the organic matter is oxidatively decomposed by microorganisms and purified by the microorganisms. At this time, oxygen necessary for biological oxidation is supplied to the wastewater in the wastewater purification apparatus 3b by the air supply means 60, and the purification treatment is performed quickly.
[0116]
  By the way, the predetermined rotation speed N (rpm) for rotating the drum screen 4a is a rotation of a predetermined rotation speed or more at which the crushed material 20a can form a substantially uniform adhesion layer 20b on the inner wall surface of the drum screen 4a. Must be a number. However, if the rotational speed is too high, the centrifugal force becomes too strong and a part of the adhesion layer 20b is released to the outside of the drum screen 4a. Therefore, the rotational speed must be equal to or lower than such rotational speed. Therefore, there is an upper limit and a lower limit for the rotational speed N of the drum screen 4a.
[0117]
  Here, the rotational speed N is a function of r when the radius of the drum screen 4a is r (m), and is 200 / r.^1/2<N <1200 / r^1/2The rotation speed is in a range that satisfies the above. That is, the rotational speed is 200 / r.^1/2In the following, the adhesion layer 20
b is not good, 1200 / r^1/2If it becomes above, it mixes with drainage and is for dehydration.
This is not appropriate because the solids passing through the small holes 5 increase.
[0118]
  The drum screen 4a is rotated at such a predetermined rotational speed between the upper limit and the lower limit until the liquid discharged from the large number of dewatering small holes 5 has a negligible flow rate. Then, a cylindrical adhesion layer 20b having a substantially uniform thickness and height is formed on the inner wall surface of the drum screen 4a.
[0119]
  When the adhesion layer 20b is formed in this way, the driving unit 6 is operated again by the control unit 13b to rotate the drum screen 4a. At this time, the control unit 13b operates the clutch 46 to transmit power from the drum screen 4a to the separation drum 40. Then, the control unit 13b operates the switching valve 19 to switch the flow path, and operates the flow rate adjusting means 12 to introduce the excess sludge 21a that has settled in the waste water purification device 3b into the drum screen 4a. The surplus sludge 21a is centrifugally dehydrated by the rotation of the drum screen 4a, and is filtered through the already formed soot crushed adhering layer 20b.
[0120]
  Most of the excess sludge 21a is fine particles of 500 μm or less, and usually passes through the dewatering small holes 5 having a diameter of about 1 mm of the drum screen 4b and cannot be filtered. Filtration is possible by using the layer 20b as a filtration layer.
[0121]
  When the filtration proceeds and the solid component of the excess sludge 21a is deposited on the adhesion layer 20b, the solid-liquid ring layer 21b in which the solid-liquid separation of the excess sludge 21a has progressed is formed on the inner peripheral surface of the adhesion layer 20b.
[0122]
  When the solid-liquid ring layer 21b has a predetermined inner diameter, excess sludge 21a is discharged from the discharge port 23. At this time, since clear water located inside the solid-liquid ring layer 21b is discharged from the discharge port 23 by centrifugation, the filtration dehydration time can be shortened while maintaining the separation efficiency in a good state.
[0123]
  The water containing the solid content of fine particles discharged from the dewatering small holes 5 and the discharge port 23 on the side surface of the drum screen 4a is ring-shaped on the inner wall surface of the separation drum 40 because the separation drum 40 rotates. Accumulate. And when this ring layer becomes a predetermined internal diameter, the water which comprises a ring layer will be discharged | emitted from the opening 43 of the upper surface part 41. FIG. At this time, since the clear separated water located inside the ring layer is discharged from the opening 43 by centrifugation, the separated water from which the suspended solids (SS) is removed can be obtained. The separated water discharged from the opening 43 is collected and discharged out of the waste water treatment apparatus through the discharge pipe 14a.
[0124]
  Here, when the detection signal of the water quality sensor 50 provided in the discharge pipe 14a exceeds a predetermined reference value, the control unit 13b operates the clutch 46 to cut off the power transmitted from the drum screen 4a to the separation drum 40. Then, the rotation of the separation drum 40 is stopped and the discharge of the discharged water is interrupted. At this time, the driving unit 6 may be operated to reduce the rotation of the separation drum 40.
[0125]
  Further, when the detection signal of the water quality sensor 50 becomes equal to or higher than a predetermined level within a predetermined reference value, the control unit 13b operates the air supply means 60 to increase the amount of air supplied to the drainage of the drainage purification device 3b. Biological oxidation in the purification device 3b is activated.
[0126]
  When the introduction of the excess sludge 21a is finished and the dewatering detection means (not shown) detects that the dewatering is almost finished, the rotation of the drum screen 4a and the separation drum 40 connected thereto is stopped. Thereby, the residual water containing the fine particle solid content in the separation drum 40 is discharged from the discharge port 44 of the inclined bottom surface portion 42 and returned to the waste water purification device 3b from the discharge portion 8a.
[0127]
  Further, the adhering layer 20b of the pulverized material 20a and the excess sludge 21a trapped therein are dried by the heating unit 7 operated by the control unit 13b. The final purpose of this drying process is to dry and solidify the water-containing solid component remaining in the drum screen 4a. In addition, in the course of the drying process, a cylindrical shape is formed in the drum screen 4a. It is also for facilitating detachment from the drum screen 4a by reducing the size while maintaining.
[0128]
  When the predetermined time has elapsed, the cylindrical dry shrinkage has an outer diameter that is smaller than the inner diameter of the opening 24 at the bottom of the drum screen 4a, falls from the opening 24, and is stored in the storage unit 9. The
[0129]
  As described above, according to the present embodiment, the slurry containing fine particles is filtered by the solid adhesion layer 20b having a large particle size. Even if the drum screen 4a is made to be capable of capturing the coarse solids, it is possible to simultaneously capture coarse solids and fine particles.
[0130]
  Further, since the hole diameter of the dewatering small holes 5 can be set to such an extent that a solid substance having a large particle diameter can be captured, it is possible to prevent the dewatering small holes 5 from being clogged without providing a clogging prevention mechanism. become.
[0131]
  Furthermore, since the adhesion layer 20b and the solid-liquid ring layer 21b are dried and contracted and dropped from the opening 24 of the drum screen 4a and stored in the storage unit 9, the transport for transporting the captured fine particles is performed. There is no need to provide means.
[0132]
  Since the residual water containing the solid content of the fine particles having passed through the drum screen 4a is discharged from the discharge port 44 formed in the bottom surface portion 42 of the separation drum 40, there is no need to provide a drawing tube or the like, and the apparatus is made compact. Can be achieved.
[0133]
  Since the fine particles that have passed through the drum screen 4a are centrifuged by the separation drum 40, it becomes possible to obtain clear separated water.
[0134]
  Since the clear water located inside the solid-liquid ring layer 21b formed by the slurry containing fine particles is discharged from the discharge port 44, it is possible to shorten the filtration dehydration time.
[0135]
  Since the separation drum 40 and the drum screen 4a are driven by the same drive unit 6, it is possible to reduce the size of the device and reduce the cost of the device.
[0136]
  Since suspended solids (SS) of treated water is removed by centrifugation, it is not necessary to provide a sedimentation separation tank in the wastewater purification device 3b, and the wastewater treatment device can be made compact.
[0137]
  Since the rotation of the drum screen 4a is stopped before the treated water purified by the waste water purification device 3b is filtered and centrifuged, the residual water in the drum screen 4a can be discharged.
[0138]
  Since the separation drum 40 can be stopped by the clutch 46 even when the drum screen 4a is rotating, the inner wall surface of the separation drum 40 is reached from the small hole 5 for dewatering when the pulverized material 20a is centrifugally dewatered. The drained wastewater is immediately introduced into the wastewater purification device 3b and can be purified.
[0139]
  Further, the quality of the discharged water flowing through the discharge pipe 14a is detected by the water quality sensor 50, and the discharge of the separated water is controlled by controlling the rotation of the separation drum 40 in accordance with the water quality. It becomes possible to keep below the reference value.
[0140]
  When the quality of the discharged water reaches a predetermined level or more, the amount of air supplied to the waste water from the waste water purification device 3b is increased by the air supply means 60, so that the purification treatment in the waste water purification device 3b is maintained in a good state. It becomes possible to do.
[0141]
【The invention's effect】
  As described above, according to the present invention, the slurry containing fine particles is filtered by the solid content adhesion layer having a large particle size, so that the solid matter having a large particle size can be captured by the pore size of the small holes for dehydration. Even if the drum screen is made to an extent, it is possible to obtain an effective effect that it is possible to simultaneously capture coarse solids and fine particles.
[0142]
  Further, according to the present invention, since the pore diameter of the dewatering small holes can be set to such an extent that a solid substance having a large particle size can be captured, it is possible to prevent clogging of the dewatering small holes without providing a clogging prevention mechanism. An effective effect of becoming possible is obtained.
[0143]
  According to the present invention, since the fine particles that have passed through the drum screen are centrifuged by the separation drum, an effective effect that it becomes possible to obtain clear separated water is obtained.
[0144]
  According to the present invention, since the separation drum and the drum screen are driven by the same drive unit, the device can be made compact and the cost of the device can be reduced. An effective effect is obtained.
[0145]
  According to the present invention, since the residual water containing the solid content of fine particles that have passed through the drum screen is discharged from the discharge port on the bottom surface of the separation drum, there is no need to provide a drawing tube or the like, and the apparatus can be made compact. The effective effect that it becomes possible is acquired.
[0146]
  According to the present invention, the clear water obtained by centrifuging the solid-liquid ring layer formed by the fine particle-containing slurry is discharged from the discharge small holes, so that it is possible to shorten the filtration dehydration time. An effect is obtained.
[0147]
  According to the present invention, since the suspended solids of the treated water are removed by centrifugation, it is not necessary to provide a sedimentation separation tank in the waste water purification device, and it is possible to reduce the size of the device effectively. Is obtained.
[0148]
  If the rotation of the drum screen is stopped after the formation of the adhesion layer and before the formation of the solid-liquid ring layer, the effective effect that the residual water in the drum screen can be discharged is obtained. can get.
[0149]
  If a clutch is provided between the drum screen and the separation drum, the separation drum can be stopped even when the drum screen is rotating. Therefore, the centrifugal separation can be stopped at the time of centrifugal dehydration, and the organic solid matter is centrifugally dehydrated. In this case, the drainage that has reached the inner wall surface of the separation drum from the small hole for dehydration is immediately introduced into the drainage purification device, so that an effective effect can be obtained.
[0150]
  If a water quality sensor is provided in the discharge pipe, the water quality of the discharged water can be detected, so that it is possible to obtain an effective effect that the quality of the discharged water can be kept below a predetermined reference value.
[0151]
  Providing a control unit that controls the operation of the drive unit or clutch based on the detection signal from the water quality sensor makes it possible to control the discharge of treated water by controlling the rotation of the centrifuge according to the quality of the discharged water. Effects can be obtained.
[0152]
  If the rotation of the drum screen is reduced to a predetermined rotational speed when the signal from the water quality sensor reaches a predetermined value or higher, the rotational speed of the centrifugal separation is increased when the water quality of the discharged water exceeds the predetermined reference value. As a result, it is possible to obtain an effective effect that treated water having poor water quality is not discharged.
[0153]
  If the transmission of power from the drum screen to the separation drum is stopped by the clutch when the signal from the water quality sensor reaches a predetermined value or more, the centrifugal separation is performed when the water quality of the discharged water exceeds the predetermined reference value. Since the operation is stopped, an effective effect is obtained in that treated water having poor water quality is not discharged.
[0154]
  If an air supply means is provided in the wastewater purification device, the amount of air supply is controlled by the quality of the discharged water, so that it is possible to keep the biological treatment state in the wastewater purification device constant. It is done.
[0155]
  If the wastewater purification device is provided with air supply means, and the control unit operates the air supply means when the signal from the water quality sensor reaches a predetermined value or more to increase the air supply amount to the residual water, When the water quality exceeds a certain level, the amount of air supplied to the waste water from the waste water purification device increases, so that an effective effect can be obtained that it is possible to maintain a good biological treatment state in the waste water purification device. .
[Brief description of the drawings]
FIG. 1 of the present inventionReference example 1Schematic showing the overall configuration of the dehydration drying apparatus
FIG. 2 of the present inventionReference example 2Schematic showing the overall configuration of the wastewater treatment equipment
FIG. 3 of the present inventionEmbodimentSchematic showing the overall configuration of the wastewater treatment equipment
FIG. 4 is a schematic diagram showing the overall configuration of a cocoon treatment apparatus examined by the present inventors.
FIG. 5 is a cross-sectional view showing a drum screen in the soot processing apparatus of FIG.
[Explanation of symbols]
  1 Disposer
  2a, 2b Dehydration and drying equipment
  3a, 3b Wastewater purification equipment
  4a, 4b Drum screen
  5 Small holes for dehydration
  6 Drive unit
  7 Heating part
  8a Discharge part
  9 Storage Department
  13a Control unit
  13b Control unit
  14 Discharge pipe
  18slurryIntroductory pipeline
  20a crushed material
  20b Adhesive layer
  21a Surplus sludge
  21b Solid-liquid ring layer
  23,44 outlet
  24 opening
  40 Separation drum
  41 Upper surface
  42 Bottom
  43 opening
  46 Clutch
  50 Water quality sensor
  60 Air supply means

Claims (6)

A small hole for dehydration is opened in the side surface, and the introduced slurry is accommodated and centrifuged to form an adhesion layer having a large particle size in the slurry on the inner wall surface of the side surface, and further introduced. A drum screen for filtering the slurry containing fine particles through the adhesion layer, a driving unit for rotating the drum screen, and a fine separation by centrifuging the fine particles that have passed through the drum screen and passed through the drum screen. An upper surface portion provided with an opening at a predetermined inner diameter position for discharging the water and collecting the solid content of the fine particles that have passed through the drum screen and for discharging the clear separated water that has been centrifuged through the drum screen. a separating drum having the a bottom portion of the discharge port for discharging the residual water containing solids is provided on inner diameter smaller position than the opening of the fine particles, the filtration The formed water of the adhesion layer and a heating unit for evaporating and dehydrating and drying apparatus of the organic solids wastewater containing organic solids is dehydrated and dried,
A wastewater purification device for purifying the wastewater discharged from the dehydration drying device;
Connecting between the dewatering and drying device and the waste water purification device, and introducing the treated water and excess sludge purified by the waste water purification device into the dewatering and drying device;
A discharge pipe for discharging the clear separated water discharged from the opening to the outside;
With a discharge part for returning the residual water containing the solid content of fine particles discharged from the discharge port to the outside of the waste water purification device,
A waste water treatment apparatus, wherein the discharge pipe is provided with a water quality sensor for detecting the quality of the discharged water. The wastewater treatment apparatus according to claim 1, further comprising a control unit that controls an operation of the drive unit or the clutch based on a detection signal from the water quality sensor. Control unit, when a signal from the water quality sensor has reached a predetermined value or more, according to claim 2, wherein the lower the rotational speed of the drum screen by operating the driving unit to a predetermined rotational speed Wastewater treatment equipment. Wherein, when said signal from the water quality sensor has reached a predetermined value or more, according to claim 2, wherein the stopping the transmission of power from the drum screen by operating the clutch to the separation drum Wastewater treatment equipment. Air supply means for supplying air is provided in the drainage to the drainage purifier, according to claim 1 to 4, wherein the control unit to control the operation of said air supply means by the detection signal from the water quality sensor The waste water treatment apparatus as described in any one of these. Wherein, when said signal from the water quality sensor has reached a predetermined value or more, claim 5, characterized in that increasing the air supply to the waste water of the waste water purification unit operates the said air supply means The waste water treatment apparatus as described.

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