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- JP2018094470A5 JP2018094470A5 JP2016239093A JP2016239093A JP2018094470A5 JP 2018094470 A5 JP2018094470 A5 JP 2018094470A5 JP 2016239093 A JP2016239093 A JP 2016239093A JP 2016239093 A JP2016239093 A JP 2016239093A JP 2018094470 A5 JP2018094470 A5 JP 2018094470A5
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- 239000010802 sludge Substances 0.000 claims description 63
- 230000003247 decreasing Effects 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 3
- 210000001736 Capillaries Anatomy 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000011550 stock solution Substances 0.000 description 1
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Description
この発明は、回転自在な円筒状のろ過体で固液分離しつつ内設するスパイラルにて汚泥搬送するドラム体に走行自在な排水ろ材を掛け回し、排出する濃縮汚泥の濃縮度を制御するドラム型濃縮機の運転方法において、予め幅を持たせた濃縮汚泥の基準汚泥濃縮度と、ドラム体の基準回転速度と、基準回転速度の最大値である最大回転速度、基準回転速度の最小値である最小回転速度、段階的に増減させる回転数幅と、排水ろ材の基準走行速度と、基準走行速度の最大値である最大走行速度、基準走行速度の最小値である最小走行速度、段階的に増減させる走行速度幅と、を設定して、濃縮汚泥の濃縮度の計測値を測定し、濃縮汚泥の計測値が基準汚泥濃縮度の範囲内の時は、ドラム型濃縮機の運転を継続し、濃縮汚泥の計測値が予め設定した基準汚泥濃縮度より低い場合、ドラム体の回転速度を回転数幅だけ減少させ、濃縮汚泥の計測値が基準汚泥濃縮度の範囲内に上昇するまでこの操作を繰り返し、ドラム体の回転速度が最小回転速度となった時は、排水ろ材の走行速度を走行速度幅だけ増加させ、濃縮汚泥の計測値が基準汚泥濃縮度の範囲内に上昇するまでこの操作を繰り返すと共に、濃縮汚泥の計測値が予め設定した基準汚泥濃縮度より高い場合、ドラム体の回転速度を回転数幅だけ増加させ、濃縮汚泥の計測値が基準汚泥濃縮度の範囲内に下降するまでこの操作を繰り返し、ドラム体の回転速度が最大回転速度となった時は、排水ろ材の走行速度を走行速度幅だけ減少させ、濃縮汚泥の計測値が基準汚泥濃縮度の範囲内に下降するまでこの操作を繰り返すもので、汚泥の性状変動に対して安定した濃縮汚泥を生成できる。
The present invention relates to a drum for controlling the concentration degree of concentrated sludge to be discharged by hanging a drainage filter medium that can be run around a drum body that conveys sludge by a spiral installed while solid-liquid separating with a rotatable cylindrical filter body. In the operation method of the type concentrator, the standard sludge concentration of the concentrated sludge with a width, the standard rotation speed of the drum body, the maximum rotation speed that is the maximum value of the reference rotation speed, and the minimum value of the reference rotation speed A certain minimum rotational speed, a rotational speed range that increases or decreases in stages, a reference traveling speed of the drainage filter medium, a maximum traveling speed that is the maximum value of the reference traveling speed, a minimum traveling speed that is the minimum value of the reference traveling speed, Set the travel speed range to increase or decrease, measure the concentration value of the concentrated sludge, and if the measured value of the concentrated sludge is within the standard sludge concentration range, continue to operate the drum type concentrator. The measured value of concentrated sludge is preset If less than the quasi-sludge enrichment reduces the rotational speed of the drum body by the rotation speed width, to the measurement value of thickened sludge is increased within the range of the reference sludge enrichment repeating this operation, the rotational speed of the drum body Min when a rotational speed increases the running speed of the drainage filter material only travel speed width, with repeat until the measured value of the concentrated sludge is increased within the range of the reference sludge enrichment, measurement of concentration sludge If it is higher than the preset standard sludge concentration, increase the rotation speed of the drum body by the rotation speed range and repeat this operation until the measured value of the concentrated sludge falls within the standard sludge concentration range. When the speed reaches the maximum rotation speed, the running speed of the drainage filter medium is reduced by the running speed range, and this operation is repeated until the measured value of the concentrated sludge falls within the standard sludge concentration range. sex It can generate a stable concentrated sludge to variations.
ドラム型濃縮機の運転が開始されると、濃縮汚泥の濃縮度は、リアルタイムに濃度計２２で計測されて制御装置２３に送られる。
When the operation of the drum type concentrator is started, the concentration of the concentrated sludge is measured by the concentration meter 22 in real time and sent to the control device 23 .
より詳しく説明すると、濃縮汚泥の計測値Ｘが基準汚泥濃度Ｘ０より低い場合には、制御装置２３はスパイラル駆動機１１に指令を与え、スパイラルの回転速度を減少させる。ドラム体３での滞留時間が増加することにより汚泥の固液分離が促進されて、汚泥の濃縮度を上昇させることができる。また、スパイラル駆動機１１の回転速度を減少させても濃縮汚泥の計測値Ｘが基準汚泥濃度Ｘ０に復帰しない場合は、制御装置２３からロール駆動機１７に指令を与え、排水ろ材４の走行速度を増加させる。ろ過体１の細孔周辺に張り付いているろ液を排水ろ材４側に毛細管現象で吸着・排水することにより、ろ過体１の排水効率を上昇させることができる。
More specifically, when the measured value X of the concentrated sludge is lower than the reference sludge concentration X0, the control device 23 gives a command to the spiral drive 11 to decrease the rotational speed of the spiral. By increasing the residence time in the drum body 3, the solid-liquid separation of the sludge is promoted, and the concentration of the sludge can be increased. If the measured value X of the concentrated sludge does not return to the reference sludge concentration X0 even if the rotational speed of the spiral drive 11 is decreased , a command is given from the control device 23 to the roll drive 17 and the running speed of the drainage filter medium 4 is given. Increase. The drainage efficiency of the filter body 1 can be increased by adsorbing and draining the filtrate stuck around the pores of the filter body 1 to the drainage filter medium 4 side by capillary action.
図５はこの実施の形態に係る運転方法のフローチャートである。
Ａ．初期設定
後段の処理設備に応じて、基準汚泥濃縮度Ｘ０（最大基準汚泥濃縮度Ｘｍａｘ，最小基準汚泥濃縮度Ｘｍｉｎ）を設定する。本実施例では、最大基準汚泥濃縮度Ｘｍａｘと最小基準汚泥濃縮度Ｘｍｉｎの間を基準汚泥濃縮度Ｘ０として幅を持たせている。
また、ドラム体３の基準回転速度Ｎ０（最大回転速度Ｎｍａｘ，最小回転速度Ｎｍｉｎ）および段階的に増減させる回転数幅ｎと、排水ろ材４の基準走行速度Ｓ０（最大走行速度Ｓｍａｘ，最小走行速度Ｓｍｉｎ）および段階的に増減させる走行速度幅ｓを設定する。
さらに、濃度計２２の計測間隔を設定する。
FIG. 5 is a flowchart of the operation method according to this embodiment.
A. The standard sludge concentration X0 (maximum standard sludge concentration Xmax, minimum standard sludge concentration Xmin) is set according to the processing equipment at the latter stage of the initial setting. In the present embodiment, a range between the maximum standard sludge concentration Xmax and the minimum standard sludge concentration Xmin is given as a reference sludge concentration X0.
Further, the reference rotational speed N0 (maximum rotational speed Nmax, minimum rotational speed Nmin) of the drum body 3, the rotational speed width n that is increased or decreased in stages, and the reference traveling speed S0 (maximum traveling speed Smax, minimum traveling speed) of the drainage filter medium 4 are obtained. Smin) and a traveling speed width s that is increased or decreased in stages.
Furthermore, the measurement interval of the densitometer 22 is set.
Ｂ．運転開始
上記基準値Ｎ０，Ｓ０にて各機器を運転し、原液をドラム体３に供給する。
B. Operation start Each device is operated at the reference values N0 and S0, and the stock solution is supplied to the drum body 3 .
Ｃ．汚泥濃縮度比較
ドラム体３から排出された濃縮汚泥の濃縮度を測定し、基準汚泥濃縮度Ｘ０と比較する。
濃縮度の計測値Ｘが基準汚泥濃縮度Ｘ０内にある場合は、各機器の運転を現状の状態で維持する。
計測値Ｘが基準汚泥濃縮度Ｘ０より低い場合は、フローチャートのＤへ移行して、ドラム体３の回転速度を段階的に減少させる制御を行う。
計測値Ｘが基準汚泥濃縮度Ｘ０より高い場合は、フローチャートのＥへ移行して、ドラム体３の回転速度を段階的に増加させる制御を行う。
C. The concentration of the concentrated sludge discharged from the sludge concentration comparison drum body 3 is measured and compared with the reference sludge concentration X0.
When the measured value X of the concentration is within the reference sludge concentration X0, the operation of each device is maintained in the current state.
When the measured value X is lower than the reference sludge concentration X0, the process proceeds to D in the flowchart, and control is performed to reduce the rotational speed of the drum body 3 stepwise.
When the measured value X is higher than the reference sludge concentration X0, the process proceeds to E in the flowchart, and control is performed to increase the rotational speed of the drum body 3 stepwise.
Ｄ．ドラム体の回転速度比較
上記フローチャートＣにおいて、濃縮汚泥の濃縮度の計測値Ｘが基準汚泥濃縮度Ｘ０より低い場合は、濃縮度を上昇させるためにスパイラル２の搬送速度を減少させるべく、段階的に減少させるドラム体３の回転数幅ｎを加味した回転数Ｎと最小回転速度Ｎｍｉｎとを比較する。
変更後の回転数Ｎが最小回転速度Ｎｍｉｎより高い場合は、フローチャートのＦへ移行してドラム体３の回転速度を段階的に減少させる制御を行う。
変更後の回転数Ｎが最小回転速度Ｎｍｉｎ以下となる場合は、フローチャートのＧへ移行して、排水ろ材４の走行速度を段階的に増加させる制御を行う。
D. Comparison of rotation speed of drum body In the flowchart C, when the measured value X of the concentrated sludge concentration is lower than the reference sludge concentration X0, in order to decrease the conveying speed of the spiral 2 in order to increase the concentration, stepwise The rotation speed N taking into account the rotation speed width n of the drum body 3 to be reduced is compared with the minimum rotation speed Nmin.
When the rotation speed N after the change is higher than the minimum rotation speed Nmin, the process proceeds to F in the flowchart, and control is performed to decrease the rotation speed of the drum body 3 stepwise.
When the rotation speed N after the change is equal to or less than the minimum rotation speed Nmin, the process proceeds to G in the flowchart, and control is performed to increase the traveling speed of the drainage filter medium 4 stepwise.
Ｅ．ドラム体の回転速度比較
上記フローチャートＣにおいて、濃縮汚泥の濃縮度の計測値Ｘが基準汚泥濃縮度Ｘ０より高い場合は、濃縮度を低下させるためにスパイラル２の搬送速度を増加させるべく、段階的に増加させるドラム体３の回転数幅ｎを加味した回転数Ｎと最大回転速度Ｎｍａｘとを比較する。
変更後の回転数Ｎが最大回転速度Ｎｍａｘより小さい場合は、フローチャートのＪへ移行してドラム体３の回転速度を段階的に増加させる制御を行う。
変更後の回転数Ｎが最大回転速度Ｎｍａｘ以上となる場合は、フローチャートのＫへ移行して、排水ろ材４の走行速度を段階的に減少させる制御を行う。
E. Comparison of the rotational speed of the drum body In the flowchart C, when the measured value X of the concentrated sludge concentration is higher than the reference sludge concentration X0, in order to increase the conveying speed of the spiral 2 in order to decrease the concentration, stepwise The rotational speed N taking into account the rotational speed width n of the drum body 3 to be increased is compared with the maximum rotational speed Nmax.
When the changed rotation speed N is smaller than the maximum rotation speed Nmax, control proceeds to J in the flowchart to increase the rotation speed of the drum body 3 stepwise.
When the changed rotation speed N is equal to or greater than the maximum rotation speed Nmax, the process proceeds to K in the flowchart, and control is performed to reduce the traveling speed of the drainage filter medium 4 stepwise.
なお、ドラム体３の回転速度あるいは排水ろ材４の走行速度を変更すると、一定時間経過後に再度濃縮度を測定し、計測値Ｘが基準濃縮度Ｘ０内に復帰するまで上記動作を繰り返す。
When the rotational speed of the drum body 3 or the traveling speed of the drainage filter medium 4 is changed, the concentration is measured again after a predetermined time has elapsed, and the above operation is repeated until the measured value X returns to the reference concentration X0.
Claims (1)
予め幅を持たせた濃縮汚泥の基準汚泥濃縮度（Ｘ０）と、
ドラム体（３）の基準回転速度（Ｎ０）と、基準回転速度（Ｎ０）の最大値である最大回転速度（Ｎｍａｘ）、基準回転速度（Ｎ０）の最小値である最小回転速度（Ｎｍｉｎ）、段階的に増減させる回転数幅（ｎ）と、
排水ろ材（４）の基準走行速度（Ｓ０）と、基準走行速度（Ｓ０）の最大値である最大走行速度（Ｓｍａｘ）、基準走行速度（Ｓ０）の最小値である最小走行速度（Ｓｍｉｎ）、段階的に増減させる走行速度幅（ｓ）と、
を設定して、
濃縮汚泥の濃縮度の計測値（Ｘ）を測定し、
濃縮汚泥の計測値（Ｘ）が基準汚泥濃縮度（Ｘ０）の範囲内の時は、ドラム型濃縮機の運転を継続し、
濃縮汚泥の計測値（Ｘ）が予め設定した基準汚泥濃縮度（Ｘ０）より低い場合、ドラム体（３）の回転速度を回転数幅（ｎ）だけ減少させ、濃縮汚泥の計測値（Ｘ）が基準汚泥濃縮度（Ｘ０）の範囲内に上昇するまでこの操作を繰り返し、
ドラム体（３）の回転速度が最小回転速度（Ｎｍｉｎ）となった時は、排水ろ材（４）の走行速度を走行速度幅（ｓ）だけ増加させ、濃縮汚泥の計測値（Ｘ）が基準汚泥濃縮度（Ｘ０）の範囲内に上昇するまでこの操作を繰り返すと共に、
濃縮汚泥の計測値（Ｘ）が予め設定した基準汚泥濃縮度（Ｘ０）より高い場合、ドラム体（３）の回転速度を回転数幅（ｎ）だけ増加させ、濃縮汚泥の計測値（Ｘ）が基準汚泥濃縮度（Ｘ０）の範囲内に下降するまでこの操作を繰り返し、
ドラム体（３）の回転速度が最大回転速度（Ｎｍａｘ）となった時は、排水ろ材（４）の走行速度を走行速度幅（ｓ）だけ減少させ、濃縮汚泥の計測値（Ｘ）が基準汚泥濃縮度（Ｘ０）の範囲内に下降するまでこの操作を繰り返す
ことを特徴とするドラム型濃縮機の運転方法。 Concentration by which a drainable filter medium (4) is hung around a drum body (3) that conveys sludge by a spiral (2) that is solid-liquid separated by a rotatable cylindrical filter body (1) and discharged. In the operation method of the drum type concentrator that controls the concentration of sludge,
The standard sludge concentration (X0) of the concentrated sludge with a width in advance,
The reference rotation speed (N0) of the drum body (3), the maximum rotation speed (Nmax) that is the maximum value of the reference rotation speed (N0), the minimum rotation speed (Nmin) that is the minimum value of the reference rotation speed (N0), Rotational speed width (n) that is increased or decreased in stages,
The reference travel speed (S0) of the drainage filter medium (4), the maximum travel speed (Smax) that is the maximum value of the reference travel speed (S0), the minimum travel speed (Smin) that is the minimum value of the reference travel speed (S0), Travel speed range (s) that is increased or decreased step by step,
Set
Measure the measured value (X) of the concentration of concentrated sludge,
When the measured value (X) of the concentrated sludge is within the range of the standard sludge concentration (X0), the operation of the drum type concentrator is continued.
When the measured value (X) of the concentrated sludge is lower than the preset standard sludge concentration (X0), the rotational speed of the drum body (3) is decreased by the rotation speed width (n), and the measured value (X) of the concentrated sludge This operation is repeated until the value rises within the range of the standard sludge concentration (X0),
When the rotational speed of the drum body (3) becomes the minimum rotational speed (Nmin), the traveling speed of the drainage filter medium (4) is increased by the traveling speed width (s), and the measured value (X) of the concentrated sludge is the standard. This operation is repeated until it rises within the range of sludge concentration (X0),
When the measured value (X) of the concentrated sludge is higher than the preset reference sludge concentration (X0), the rotational speed of the drum body (3) is increased by the rotation speed width (n), and the measured value (X) of the concentrated sludge is increased. Repeat this operation until it falls within the range of standard sludge concentration (X0),
When the rotational speed of the drum body (3) reaches the maximum rotational speed (Nmax), the traveling speed of the drainage filter medium (4) is decreased by the traveling speed width (s), and the measured value (X) of the concentrated sludge is the standard. The operation method of the drum type concentrator, wherein this operation is repeated until the sludge concentration falls within the range of the sludge concentration (X0).
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS52132463A (en) * | 1976-04-28 | 1977-11-07 | Toyobo Co Ltd | Filtering method |
| JPS6016879B2 (en) * | 1980-08-01 | 1985-04-27 | 株式会社 西原環境衛生研究所 | Sludge treatment equipment |
| JPS625809U (en) * | 1985-06-24 | 1987-01-14 | ||
| JPS62148312U (en) * | 1986-03-13 | 1987-09-19 | ||
| JP3660191B2 (en) * | 2000-03-13 | 2005-06-15 | 住友重機械工業株式会社 | Fermentation drying method |
| JP4427798B2 (en) * | 2005-04-14 | 2010-03-10 | 株式会社石垣 | Operation control method and operation control device for differential speed rotary concentrator |
| JP4498219B2 (en) * | 2005-06-06 | 2010-07-07 | 株式会社クボタ | Control method of belt type concentrator |
| JP4267676B2 (en) * | 2006-01-20 | 2009-05-27 | 巴工業株式会社 | Belt type concentrator |
| JP4849380B2 (en) * | 2007-03-09 | 2012-01-11 | 株式会社石垣 | Screw press cake moisture content constant control method |
| JP5716049B2 (en) * | 2012-03-02 | 2015-05-13 | 三井造船環境エンジニアリング株式会社 | Sludge treatment system and sludge treatment method |
| JP5192609B1 (en) * | 2012-12-21 | 2013-05-08 | 巴工業株式会社 | Sludge treatment system, sludge treatment system operation control program |
| JP6183622B2 (en) * | 2015-01-07 | 2017-08-23 | 株式会社石垣 | Solid recovery system for drum type concentrator |
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