JP2020199470A - Rotary sludge dryer - Google Patents

Rotary sludge dryer Download PDF

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JP2020199470A
JP2020199470A JP2019109328A JP2019109328A JP2020199470A JP 2020199470 A JP2020199470 A JP 2020199470A JP 2019109328 A JP2019109328 A JP 2019109328A JP 2019109328 A JP2019109328 A JP 2019109328A JP 2020199470 A JP2020199470 A JP 2020199470A
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bowl
sludge
rotary
cylindrical
cylindrical bowl
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JP7130914B2 (en
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賢 村岡
Masaru Muraoka
賢 村岡
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Ishigaki Co Ltd
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Ishigaki Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/30—Wastewater or sewage treatment systems using renewable energies
    • Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy

Abstract

To provide a rotary sludge dryer comprising a cylindrical bowl and a screw blade and drying sludge supplied into the cylindrical bowl, which can efficiently dry the sludge by rotation of the cylindrical bowl and of the screw blade.SOLUTION: A rotary sludge dryer 1 is provided that comprises: a cylindrical bowl 2; a screw shaft 3 arranged in the cylindrical bowl 2; a screw blade 4 wound around the screw shaft 3; a sludge supply pipe 9 which supplies sludge into the cylindrical bowl 2; and a hot air supply pipe 10 which supplies hot air into the cylindrical bowl 2. The rotary sludge dryer 1 is configured in such a way that the dryer 1 has a bowl driving machine 5 connected to the cylindrical bowl 2 to rotationally drive the cylindrical bowl 2, and a screw driving machine 6 connected to the screw shaft 3 to rotationally drive the screw shaft 3, and therefore the cylindrical bowl and the screw shaft are separately driven, and a sludge transport speed and a rolling speed can be set.SELECTED DRAWING: Figure 1

Description

本発明は、排水処理設備から発生する汚泥処理や、製紙向け汚泥処理などに用いられる汚泥乾燥機において、処理場内で稼働している焼却設備や消化設備、エネルギー供給設備から発生する排熱等を利用した回転型汚泥乾燥機に関する。 In the present invention, in a sludge dryer used for sludge treatment generated from wastewater treatment equipment and sludge treatment for papermaking, waste heat generated from incineration equipment, digestion equipment, energy supply equipment, etc. operating in the treatment plant can be removed. Regarding the rotary sludge dryer used.

従来、排水処理設備等から発生する汚泥は、焼却処理を行う前に、脱水機等で予め脱水し、乾燥機によって乾燥処理されている。
乾燥機は、汚泥を搬送しつつ熱媒体を供給することで汚泥を乾燥させるものが用いられており、特許文献１は、円筒形のケーシング内に設けたシャフトに、全長にわたり螺旋状の送り羽根を取付け、ケーシングの上下に熱媒体入口と熱媒体出口をそれぞれ設けた汚泥乾燥機を開示している。 Conventionally, sludge generated from wastewater treatment equipment and the like is dehydrated in advance by a dehydrator or the like and dried by a dryer before incineration.
A dryer is used that dries sludge by supplying a heat medium while transporting sludge. Patent Document 1 describes a shaft provided in a cylindrical casing with a spiral feed vane over the entire length. Discloses a sludge dryer in which a heat medium inlet and a heat medium outlet are provided above and below the casing.

実開昭５６−１３３４００号公報Jitsukaisho 56-133400

特許文献１に開示された汚泥乾燥機は、送り羽根によって汚泥を搬送するため、十分に乾燥させるには長い搬送距離を必要としていた。
特許文献１に開示された汚泥乾燥機は、熱媒体を供給するのに個別の熱源が必要となるうえ、汚泥の乾燥は高温で行うため、乾燥に要するエネルギー消費量が大きい。
また、高温（８０℃以上）で乾燥を行うと臭気が発生するため、脱臭設備等を別途必要となる。低温で乾燥を行うと、汚泥流入量の変化に対応できずに乾燥が不十分となる。また、十分な乾燥時間を確保するためには装置を大型化する必要があった。
本発明は、汚泥の搬送時間と転動速度を変化させて、汚泥を乾燥することができる回転型汚泥乾燥機を提供する。 Since the sludge dryer disclosed in Patent Document 1 transports sludge by feed blades, a long transport distance is required to sufficiently dry the sludge.
The sludge dryer disclosed in Patent Document 1 requires an individual heat source to supply a heat medium, and since the sludge is dried at a high temperature, the energy consumption required for drying is large.
Further, since odor is generated when drying is performed at a high temperature (80 ° C. or higher), a deodorizing facility or the like is required separately. When drying is performed at a low temperature, it is not possible to respond to changes in sludge inflow and drying becomes insufficient. In addition, it was necessary to increase the size of the device in order to secure a sufficient drying time.
The present invention provides a rotary sludge dryer capable of drying sludge by changing the sludge transport time and rolling speed.

円筒状の円筒ボウルと、円筒ボウル内に配置されたスクリュー軸と、スクリュー軸に巻き掛けたスクリュー羽根と、円筒ボウル内に汚泥を供給する汚泥供給管と、円筒ボウル内に温風を供給する温風供給管と、を備える回転型汚泥乾燥機において、円筒ボウルに接続して回転駆動させるボウル駆動機と、スクリュー軸に接続して回転駆動させるスクリュー駆動機と、を有することで、円筒ボウルとスクリュー軸をそれぞれ別々に駆動させ、汚泥の搬送速度と転動速度を設定できる。 A cylindrical cylindrical bowl, a screw shaft arranged in the cylindrical bowl, a screw blade wound around the screw shaft, a sludge supply pipe for supplying sludge in the cylindrical bowl, and hot air being supplied in the cylindrical bowl. In a rotary sludge dryer provided with a hot air supply pipe, a cylindrical bowl is provided by having a bowl drive that is connected to a cylindrical bowl and driven to rotate, and a screw drive that is connected to a screw shaft to drive the cylinder to rotate. And the screw shaft can be driven separately to set the sludge transfer speed and rolling speed.

前記円筒ボウルは、固定ボウルと回転ボウルで構成し、固定ボウルに汚泥供給管と温風供給管を連結し、回転ボウルにボウル駆動機を接続することで、固定ボウルから汚泥を供給し、回転ボウルで汚泥を転動させながら乾燥することができる。 The cylindrical bowl is composed of a fixed bowl and a rotating bowl. By connecting a sludge supply pipe and a hot air supply pipe to the fixed bowl and connecting a bowl drive to the rotating bowl, sludge is supplied from the fixed bowl and rotated. The sludge can be rolled and dried in a bowl.

前記円筒ボウルは、始端部に固定した側壁を備え、側壁に汚泥供給管と温風供給管を連結することで、側壁から汚泥を供給し、円筒ボウル全体で汚泥を転動させることができる。 The cylindrical bowl is provided with a side wall fixed at the starting end, and by connecting a sludge supply pipe and a warm air supply pipe to the side wall, sludge can be supplied from the side wall and sludge can be rolled over the entire cylindrical bowl.

前記円筒ボウルは、始端部に固定した側壁を備えると共に、前記スクリュー軸内に汚泥供給管を形成し、スクリュー軸に供給孔を設けることで、スクリュー軸から汚泥を供給することができる。 The cylindrical bowl is provided with a side wall fixed to the starting end portion, a sludge supply pipe is formed in the screw shaft, and a supply hole is provided in the screw shaft, so that sludge can be supplied from the screw shaft.

前記ボウル駆動機は、スクリュー駆動機と逆方向に駆動することで、汚泥を大きく転動させることができる。 By driving the bowl drive machine in the opposite direction to the screw drive machine, sludge can be largely rolled.

前記温風供給管に供給する温風は５０〜７０℃の温度であることで、乾燥に伴う臭気の発生を低減させることができる。 Since the temperature of the hot air supplied to the hot air supply pipe is 50 to 70 ° C., the generation of odor due to drying can be reduced.

本発明の回転型汚泥乾燥機は、円筒ボウルとスクリュー軸にそれぞれ駆動機を連結し、別々に駆動させることで、汚泥の搬送速度と転動速度を設定できる。
スクリュー軸の駆動機で搬送速度を調整できるため、回転型汚泥乾燥機に供給する温風は高温である必要はなく、回転型汚泥乾燥機を配置する処理場で発生した排熱で十分に乾燥できる。
排熱を５０〜７０℃の温風に変換して回転型汚泥乾燥機に供給すると、乾燥に伴う臭気の発生を低減させることができる。 In the rotary sludge dryer of the present invention, the sludge transport speed and rolling speed can be set by connecting a drive machine to a cylindrical bowl and a screw shaft and driving them separately.
Since the transport speed can be adjusted by the screw shaft drive, the hot air supplied to the rotary sludge dryer does not need to be hot, and the exhaust heat generated at the treatment plant where the rotary sludge dryer is installed is sufficient to dry. it can.
When the exhaust heat is converted into warm air at 50 to 70 ° C. and supplied to the rotary sludge dryer, the generation of odor due to drying can be reduced.

円筒ボウルの駆動機で転動速度を調整できるため、搬送中の汚泥を破砕・攪拌可能となる。円筒ボウルの回転数を速めると、汚泥が大きく転動し、破砕・撹拌が促進されて乾燥効率が向上する。 Since the rolling speed can be adjusted by the driving machine of the cylindrical bowl, the sludge being transported can be crushed and agitated. When the number of rotations of the cylindrical bowl is increased, the sludge rolls greatly, crushing and stirring are promoted, and the drying efficiency is improved.

本発明に係る回転型汚泥乾燥機の断面図である。It is sectional drawing of the rotary sludge dryer which concerns on this invention. 本発明の他の実施形態１における回転型汚泥乾燥機の要部断面図である。It is sectional drawing of the main part of the rotary sludge dryer in another Embodiment 1 of this invention. 本発明の他の実施形態２における回転型汚泥乾燥機の要部断面図である。It is sectional drawing of the main part of the rotary sludge dryer in another Embodiment 2 of this invention. 本発明の他の実施形態３における回転型汚泥乾燥機の要部断面図である。It is sectional drawing of the main part of the rotary sludge dryer in another Embodiment 3 of this invention. 本発明の実施例における回転型汚泥乾燥機のフロー図である。It is a flow chart of the rotary sludge dryer in the Example of this invention.

図１は、本発明に係る回転型汚泥乾燥機の断面図である。
本発明に係る回転型汚泥乾燥機１は、円筒状の円筒ボウル２と、円筒ボウル２内に配置されたスクリュー軸３と、スクリュー軸３に巻き掛けたスクリュー羽根４と、円筒ボウル２に接続して回転駆動させるボウル駆動機５と、スクリュー軸３に接続して回転駆動させるスクリュー駆動機６と、円筒ボウル２とスクリュー軸３を回転自在に支持するフレーム７ａ、７ｂと、円筒ボウル２を覆うケーシング８とを備える。
円筒ボウル２には、汚泥を供給する汚泥供給管９と、温風を供給する温風供給管１０を連結する。ケーシング８上部に排気管１１を連結し、円筒ボウル２から排出される温風をケーシング８外に排出する。また、ケーシング８下部に排水管１２を連結し、ケーシング８内で結露した水分をケーシング８外に排出する。
ケーシング８の一端には排出口１３を設け、円筒ボウル２から排出された汚泥は排出部１３から回転型汚泥乾燥機１外に排出される。 FIG. 1 is a cross-sectional view of the rotary sludge dryer according to the present invention.
The rotary sludge dryer 1 according to the present invention is connected to a cylindrical cylindrical bowl 2, a screw shaft 3 arranged in the cylindrical bowl 2, a screw blade 4 wound around the screw shaft 3, and a cylindrical bowl 2. A bowl drive 5 that is rotationally driven, a screw drive 6 that is connected to a screw shaft 3 and is rotationally driven, frames 7a and 7b that rotatably support the cylindrical bowl 2 and the screw shaft 3, and a cylindrical bowl 2. A casing 8 for covering is provided.
A sludge supply pipe 9 for supplying sludge and a hot air supply pipe 10 for supplying warm air are connected to the cylindrical bowl 2. An exhaust pipe 11 is connected to the upper part of the casing 8 to discharge the warm air discharged from the cylindrical bowl 2 to the outside of the casing 8. Further, a drain pipe 12 is connected to the lower part of the casing 8 to discharge the water condensed in the casing 8 to the outside of the casing 8.
A discharge port 13 is provided at one end of the casing 8, and the sludge discharged from the cylindrical bowl 2 is discharged from the discharge unit 13 to the outside of the rotary sludge dryer 1.

円筒ボウル２は始端部に側壁１４を備え、側壁１４には温風供給管１０を連結し、温風を円筒ボウル２内に供給する。円筒ボウル２の終端部は開口１５を有し、円筒ボウル２内に供給された汚泥がスクリュー羽根４で円筒ボウル２終端部へ搬送され、開口１５から排出部１３へ排出される。また、円筒ボウル２内に供給された温風は円筒ボウル２内を通りつつ汚泥を乾燥し、終端部の開口１５を通ってケーシング９に連結した排気管１１から回転型汚泥乾燥機１外に排出される。 The cylindrical bowl 2 is provided with a side wall 14 at the starting end, and a hot air supply pipe 10 is connected to the side wall 14 to supply warm air into the cylindrical bowl 2. The terminal portion of the cylindrical bowl 2 has an opening 15, and sludge supplied into the cylindrical bowl 2 is conveyed to the terminal portion of the cylindrical bowl 2 by the screw blades 4 and discharged from the opening 15 to the discharge portion 13. Further, the warm air supplied into the cylindrical bowl 2 dries the sludge while passing through the cylindrical bowl 2, and passes through the opening 15 at the end portion and is connected to the casing 9 from the exhaust pipe 11 to the outside of the rotary sludge dryer 1. It is discharged.

円筒ボウル２は、始端部をフレーム７ａに固定する固定ボウル２ａと、終端部をフレーム7ａに回転自在に支持する回転ボウル２ｂとで構成される。固定ボウル２ａと回転ボウル２ｂは摺動自在に接続し、図示しない中間軸受で支持する。 The cylindrical bowl 2 is composed of a fixed bowl 2a for fixing the start end portion to the frame 7a and a rotary bowl 2b for rotatably supporting the end portion to the frame 7a. The fixed bowl 2a and the rotary bowl 2b are slidably connected and supported by an intermediate bearing (not shown).

固定ボウル２ａの上部には汚泥供給管９とホッパー１６を連結し、ホッパー１６から汚泥を供給する。
回転ボウル２ｂは終端部をフレーム７ｂで回転自在に支持しており、回転ボウル２ｂから延設したスプロケットをボウル駆動機５と接続して回転駆動させる。
スクリュー軸３は両端をフレーム７ａ、７ｂで回転自在に支持してあり、フレーム７ｂから延設したスクリュー軸３にスプロケットを設け、スクリュー駆動機６と接続することで回転駆動させる。 A sludge supply pipe 9 and a hopper 16 are connected to the upper portion of the fixed bowl 2a, and sludge is supplied from the hopper 16.
The end of the rotary bowl 2b is rotatably supported by a frame 7b, and a sprocket extending from the rotary bowl 2b is connected to the bowl drive 5 to drive the rotary bowl 2b to rotate.
Both ends of the screw shaft 3 are rotatably supported by frames 7a and 7b, and a sprocket is provided on the screw shaft 3 extending from the frame 7b and is rotationally driven by connecting to the screw drive machine 6.

スクリュー駆動機６は回転数を低速に調整することで、スクリュー羽根４の搬送速度が低下し、汚泥の滞留時間を長時間に設定することができる。ボウル駆動機５は、回転数を高速に調整すると、汚泥が激しく転動して回転ボウル２ｂ内で撹拌が促進される。回転ボウル２ｂの回転をスクリュー軸３と同方向に回転させても良いが、スクリュー軸３と逆方向に回転させることで、より大きな転動作用をもたらす。 By adjusting the rotation speed of the screw drive 6 to a low speed, the transport speed of the screw blade 4 is lowered, and the sludge residence time can be set to a long time. When the rotation speed of the bowl drive 5 is adjusted at high speed, sludge rolls violently and stirring is promoted in the rotating bowl 2b. The rotation of the rotary bowl 2b may be rotated in the same direction as the screw shaft 3, but the rotation in the direction opposite to that of the screw shaft 3 provides a larger rotation operation.

図２は、本発明の他の実施形態１における回転型汚泥乾燥機の要部断面である。
図２に示すように、円筒ボウル２は固定ボウル２ａを省略し、側壁１４と回転ボウル２ｂを摺動自在に接続してもよい。このとき側壁１４はフレーム７ａに連結して固定する。汚泥供給管９を側壁１４上部に連結し、温風供給管１０を側壁１４下部に連結しており、側壁１４から汚泥と温風を回転ボウル２ｂ内に供給する。 FIG. 2 is a cross section of a main part of the rotary sludge dryer according to another embodiment 1 of the present invention.
As shown in FIG. 2, in the cylindrical bowl 2, the fixed bowl 2a may be omitted, and the side wall 14 and the rotary bowl 2b may be slidably connected. At this time, the side wall 14 is connected to and fixed to the frame 7a. The sludge supply pipe 9 is connected to the upper part of the side wall 14, and the warm air supply pipe 10 is connected to the lower part of the side wall 14, and sludge and warm air are supplied from the side wall 14 into the rotary bowl 2b.

図３は、本発明の他の実施形態２における回転型汚泥乾燥機の要部断面図である。
図２と同様に回転ボウル２ｂのみで構成し、側壁１４より汚泥と温風を供給する。図３では、側壁１４を貫通するスクリュー軸３の内部に汚泥供給管９を形成しており、スクリュー軸３に供給孔１７を設けることで回転ボウル２ｂ内に汚泥を供給する。温風供給管１０は側壁１４下部に連結し、回転ボウル２ｂ内に温風を供給する。 FIG. 3 is a cross-sectional view of a main part of the rotary sludge dryer according to the second embodiment of the present invention.
Similar to FIG. 2, it is composed of only the rotating bowl 2b, and sludge and warm air are supplied from the side wall 14. In FIG. 3, a sludge supply pipe 9 is formed inside a screw shaft 3 penetrating the side wall 14, and sludge is supplied into the rotary bowl 2b by providing a supply hole 17 in the screw shaft 3. The hot air supply pipe 10 is connected to the lower part of the side wall 14 to supply hot air into the rotating bowl 2b.

図４は、本発明の他の実施形態３における回転型汚泥乾燥機の要部断面図である。
側壁１４を貫通するスクリュー軸３の内部に温風供給管１０を形成しており、スクリュー軸３に供給孔１７を設けることで回転ボウル２ｂ内に温風を供給する。汚泥供給管９は側壁１４上部に連結し、回転ボウル２ｂ内に汚泥を供給する。図４に示すように、スクリュー軸３は回転ボウル２ｂの終端部まで内部に温風供給管１０を形成し、供給孔１７を複数設けてもよい。 FIG. 4 is a cross-sectional view of a main part of the rotary sludge dryer according to the third embodiment of the present invention.
A hot air supply pipe 10 is formed inside the screw shaft 3 penetrating the side wall 14, and the hot air is supplied into the rotary bowl 2b by providing the supply hole 17 in the screw shaft 3. The sludge supply pipe 9 is connected to the upper part of the side wall 14 to supply sludge into the rotary bowl 2b. As shown in FIG. 4, the screw shaft 3 may have a hot air supply pipe 10 formed inside up to the end of the rotary bowl 2b, and a plurality of supply holes 17 may be provided.

図２〜４のように、円筒ボウル２の側壁１４側から汚泥を供給する場合、円筒ボウル２に固定ボウル２ａを設ける必要がなく、側壁１４をフレーム７ａに固定し、回転ボウル２ｂを側壁１４と摺動時自在に接続することで、円筒ボウル２全体を回転して汚泥を搬送することができる。 When sludge is supplied from the side wall 14 side of the cylindrical bowl 2 as shown in FIGS. 2 to 4, it is not necessary to provide the fixed bowl 2a on the cylindrical bowl 2, the side wall 14 is fixed to the frame 7a, and the rotary bowl 2b is attached to the side wall 14. By freely connecting to and sludge, sludge can be conveyed by rotating the entire cylindrical bowl 2.

図５は、本発明の実施例における回転型汚泥乾燥機のフロー図である。
本発明の回転型汚泥乾燥機１は例えば下水処理場に配置される。下水処理場には、消化槽１０１、焼却設備１０２、発電設備１０３が配置され、それぞれ熱交換器１０４ａ、１０４ｂ、１０４ｃを備える。 FIG. 5 is a flow chart of a rotary sludge dryer according to an embodiment of the present invention.
The rotary sludge dryer 1 of the present invention is arranged in, for example, a sewage treatment plant. A digestion tank 101, an incineration facility 102, and a power generation facility 103 are arranged in the sewage treatment plant, and are provided with heat exchangers 104a, 104b, and 104c, respectively.

熱交換器１０４は、高温の熱を脱水ケーキの乾燥に適した温度（５０〜７０℃）の温風に変換する。
消化槽１０１の熱交換器１０４ａは、消化槽の加温設備で発生した排熱を温風に変換する。
焼却設備１０２の熱交換器１０４ｂは、焼却で発生した排熱を温風に変換する。
発電設備１０３の熱交換器１０４ｃは、発電で発生した排熱を温風に変換する。
各熱交換器１０４ａ、１０４ｂ、１０４ｃによって変換された温風は、回転型汚泥乾燥機１に送られる。熱交換器１０４は回転型汚泥乾燥機１の温風供給管１０と連結して温風を円筒ボウル２に供給する。 The heat exchanger 104 converts the high temperature heat into warm air at a temperature (50 to 70 ° C.) suitable for drying the dehydrated cake.
The heat exchanger 104a of the digestion tank 101 converts the exhaust heat generated in the heating equipment of the digestion tank into warm air.
The heat exchanger 104b of the incineration facility 102 converts the exhaust heat generated in the incineration into warm air.
The heat exchanger 104c of the power generation facility 103 converts the exhaust heat generated by the power generation into warm air.
The warm air converted by each of the heat exchangers 104a, 104b, 104c is sent to the rotary sludge dryer 1. The heat exchanger 104 is connected to the hot air supply pipe 10 of the rotary sludge dryer 1 to supply hot air to the cylindrical bowl 2.

下水処理場に流入した汚泥は脱水処理された後、脱水ケーキとして回転型汚泥乾燥機１に送られる。
回転型汚泥乾燥機１は、円筒ボウル２内の脱水ケーキをスクリュー羽根４で搬送すると共に、下水処理場の各設備の熱交換器１０４ａ、１０４ｂ、１０４ｃで変換した温風を円筒ボウル２内に供給し、乾燥処理を施す。 The sludge that has flowed into the sewage treatment plant is dehydrated and then sent to the rotary sludge dryer 1 as a dehydrated cake.
The rotary sludge dryer 1 conveys the dewatered cake in the cylindrical bowl 2 by the screw blades 4, and hot air converted by the heat exchangers 104a, 104b, 104c of each facility of the sewage treatment plant is transferred into the cylindrical bowl 2. Supply and dry.

ここで、汚泥を乾燥させるにあたり、８０℃より高い温度の熱風を用いると、乾燥の際に臭気が発生する。従って、熱交換器１０４は各設備の排熱を５０〜７０℃の温風に変換し、回転型汚泥乾燥機１へ供給する。 Here, when hot air having a temperature higher than 80 ° C. is used to dry the sludge, an odor is generated during the drying. Therefore, the heat exchanger 104 converts the exhaust heat of each facility into warm air at 50 to 70 ° C. and supplies it to the rotary sludge dryer 1.

回転型汚泥乾燥機１は、ボウル駆動機５とスクリュー駆動機６により、円筒ボウル２とスクリュー軸３を駆動させて汚泥を搬送する。円筒ボウル２とスクリュー軸３の回転速度を調整し、回転型汚泥乾燥機１内での汚泥の滞留時間と転動速度を調整する。 The rotary sludge dryer 1 uses a bowl drive machine 5 and a screw drive machine 6 to drive a cylindrical bowl 2 and a screw shaft 3 to convey sludge. The rotation speed of the cylindrical bowl 2 and the screw shaft 3 is adjusted, and the residence time and rolling speed of sludge in the rotary sludge dryer 1 are adjusted.

脱水ケーキは搬送設備への付着等を防止するため、回転型汚泥乾燥機１で含水率をおよそ２０〜４０％まで低下させることが望ましい。従って、含水率が高い場合は、スクリュー駆動機６の回転数を下げると共にボウル駆動機５の回転数を上昇させることで、搬送速度を遅くして回転型汚泥乾燥機１での滞留時間を長くすると共に、汚泥を大きく転動させて撹拌・破砕を行うことで脱水ケーキを乾燥する。 In order to prevent the dehydrated cake from adhering to the transport equipment, it is desirable to reduce the water content to about 20 to 40% with the rotary sludge dryer 1. Therefore, when the water content is high, the rotation speed of the screw drive machine 6 is lowered and the rotation speed of the bowl drive machine 5 is increased to slow down the transport speed and lengthen the residence time in the rotary sludge dryer 1. At the same time, the dewatered cake is dried by rolling the sludge greatly and stirring and crushing it.

回転型汚泥乾燥機１で含水率が２０〜４０％まで乾燥した脱水ケーキは、排出口１３から排出され、次の工程に搬送される。
回転型汚泥乾燥機１に供給された温風は、排気管１１から排ガスとして排出される。また、回転型汚泥乾燥機１内で脱水ケーキから蒸発した水分はケーシング８内で結露し、排出管１２から排水として排出される。 The dehydrated cake dried to a moisture content of 20 to 40% by the rotary sludge dryer 1 is discharged from the discharge port 13 and transported to the next step.
The warm air supplied to the rotary sludge dryer 1 is discharged as exhaust gas from the exhaust pipe 11. Further, the moisture evaporated from the dehydrated cake in the rotary sludge dryer 1 condenses in the casing 8 and is discharged as drainage from the discharge pipe 12.

１ 回転型汚泥乾燥機
２ 円筒ボウル
２ａ 固定ボウル
２ｂ 回転ボウル
３ スクリュー軸
４ スクリュー羽根
５ ボウル駆動機
６ スクリュー駆動機
９ 汚泥供給管
１０ 温風供給管
１４ 側壁
１７ 供給孔 1 Rotary sludge dryer 2 Cylindrical bowl 2a Fixed bowl 2b Rotating bowl 3 Screw shaft 4 Screw blade 5 Bowl drive 6 Screw drive 9 Sludge supply pipe 10 Warm air supply pipe 14 Side wall 17 Supply hole

Claims (6)

円筒状の円筒ボウル（２）と、円筒ボウル（２）内に配置されたスクリュー軸（３）と、スクリュー軸（３）に巻き掛けたスクリュー羽根（４）と、円筒ボウル（２）内に汚泥を供給する汚泥供給管（９）と、円筒ボウル（２）内に温風を供給する温風供給管（１０）と、を備える回転型汚泥乾燥機（１）において、
円筒ボウル（２）に接続して回転駆動させるボウル駆動機（５）と、
スクリュー軸（３）に接続して回転駆動させるスクリュー駆動機（６）と、を有する
ことを特徴とする回転型汚泥乾燥機。 In a cylindrical cylindrical bowl (2), a screw shaft (3) arranged in the cylindrical bowl (2), a screw blade (4) wound around the screw shaft (3), and a cylindrical bowl (2). In a rotary sludge dryer (1) including a sludge supply pipe (9) for supplying sludge and a hot air supply pipe (10) for supplying warm air into a cylindrical bowl (2).
A bowl drive (5) that is connected to a cylindrical bowl (2) and driven to rotate,
A rotary sludge dryer characterized by having a screw drive machine (6) connected to a screw shaft (3) and driven to rotate. 前記円筒ボウル（２）は、固定ボウル（２ａ）と回転ボウル（２ｂ）で構成し、
固定ボウル（２ａ）に汚泥供給管（９）と温風供給管（１０）を連結し、
回転ボウル（２ｂ）にボウル駆動機（５）を接続する
ことを特徴とする請求項１に記載の回転型汚泥乾燥機。 The cylindrical bowl (2) is composed of a fixed bowl (2a) and a rotating bowl (2b).
The sludge supply pipe (9) and the warm air supply pipe (10) are connected to the fixed bowl (2a).
The rotary sludge dryer according to claim 1, wherein the bowl drive machine (5) is connected to the rotary bowl (2b). 前記円筒ボウル（２）は、始端部に固定した側壁（１４）を備え、
側壁（１４）に汚泥供給管（９）と温風供給管（１０）を連結する
ことを特徴とする請求項１に記載の回転型汚泥乾燥機。 The cylindrical bowl (2) includes a side wall (14) fixed to the starting end.
The rotary sludge dryer according to claim 1, wherein the sludge supply pipe (9) and the hot air supply pipe (10) are connected to the side wall (14). 前記円筒ボウル（２）は、始端部に固定した側壁（１４）を備えると共に、
前記スクリュー軸（３）内に汚泥供給管（９）を形成し、
スクリュー軸（３）に供給孔（１７）を設ける
ことを特徴とする請求項１に記載の回転型汚泥乾燥機。 The cylindrical bowl (2) is provided with a side wall (14) fixed to the starting end, and is provided with a side wall (14).
A sludge supply pipe (9) is formed in the screw shaft (3).
The rotary sludge dryer according to claim 1, wherein the screw shaft (3) is provided with a supply hole (17). 前記ボウル駆動機（５）は、
スクリュー駆動機（６）と逆方向に駆動する
ことを特徴とする請求項１乃至請求項４の何れか１項に記載の回転型汚泥乾燥機。 The bowl drive (5)
The rotary sludge dryer according to any one of claims 1 to 4, wherein the sludge dryer is driven in the direction opposite to that of the screw drive machine (6). 前記温風供給管（１０）に供給する温風は５０〜７０℃の温度である
ことを特徴とする請求項１乃至請求項５の何れか１項に記載の回転型汚泥乾燥機。 The rotary sludge dryer according to any one of claims 1 to 5, wherein the hot air supplied to the hot air supply pipe (10) has a temperature of 50 to 70 ° C.
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JPS501451A (en) * 1973-05-10 1975-01-09
JPS5353063A (en) * 1976-10-25 1978-05-15 Shinko Pfaudler Horizontal rotary drying apparatus for water containing particlar substance
JPS6023694U (en) * 1983-07-26 1985-02-18 株式会社クボタ sludge dryer
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Publication number Priority date Publication date Assignee Title
CN114524602A (en) * 2022-02-23 2022-05-24 生态环境部华南环境科学研究所 Reduction device and method for reduction treatment of electroplating sewage sludge
CN114524602B (en) * 2022-02-23 2022-10-25 生态环境部华南环境科学研究所 Reduction device and method for reduction treatment of electroplating sewage sludge

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