JP4498219B2 - Control method of belt type concentrator - Google Patents

Control method of belt type concentrator Download PDF

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JP4498219B2
JP4498219B2 JP2005164909A JP2005164909A JP4498219B2 JP 4498219 B2 JP4498219 B2 JP 4498219B2 JP 2005164909 A JP2005164909 A JP 2005164909A JP 2005164909 A JP2005164909 A JP 2005164909A JP 4498219 B2 JP4498219 B2 JP 4498219B2
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endless belt
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寛幸 松井
太 水谷
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Kubota Corp
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本発明は、例えば下水処理場における余剰汚泥の濃縮等に用いられるベルト型濃縮機の制御方法に関する。   The present invention relates to a method for controlling a belt-type concentrator used for, for example, concentration of excess sludge in a sewage treatment plant.

従来、ベルト型濃縮機としては、例えば図３に示すように、架台６１に前後一対のローラー６２ａ，６２ｂを設け、透水性を有するワイヤーメッシュ構造の無端ベルト６３を上記両ローラー６２ａ，６２ｂ間に掛け渡し、排出側のローラー６２ｂを駆動装置の一例であるモータ６５で回転駆動することにより、無端ベルト６３を回動させ、濃縮対象汚泥Ａを搬送軌道６４に沿って無端ベルト６３で搬送しながら重力濾過するものがある（下記特許文献１参照）。   Conventionally, as a belt-type concentrator, for example, as shown in FIG. 3, a gantry 61 is provided with a pair of front and rear rollers 62a and 62b, and an endless belt 63 having a water-permeable wire mesh structure is interposed between the rollers 62a and 62b. The endless belt 63 is rotated by rotating and driving the roller 62b on the discharge side by a motor 65 which is an example of a driving device, and the sludge A to be concentrated is transported by the endless belt 63 along the transport track 64. There is one that gravity filters (see Patent Document 1 below).

尚、搬送軌道６４の始端部には、無端ベルト６３上に濃縮対象汚泥Ａを供給する供給部６６（供給用シュート等）が設けられ、搬送軌道６４の終端部には、脱水後の濃縮汚泥Ｂを無端ベルト６３上から排出する排出部６７（排出用シュート等）が設けられている。また、架台６１には、戻り軌道６８に沿って走行する無端ベルト６３に洗浄水を噴射して無端ベルト６３を洗浄する洗浄装置６９が設けられている。   A supply unit 66 (supply chute or the like) for supplying the sludge to be concentrated A is provided on the endless belt 63 at the start end of the transport track 64, and the concentrated sludge after dehydration is provided at the end of the transport track 64. A discharge portion 67 (discharge chute or the like) for discharging B from the endless belt 63 is provided. The gantry 61 is provided with a cleaning device 69 that sprays cleaning water onto the endless belt 63 that travels along the return track 68 to clean the endless belt 63.

これによると、濃縮対象汚泥Ａは、凝集剤７２でフロックを形成した後、供給部６６から回動する無端ベルト６３上に供給され、無端ベルト６３で搬送されながら重力濾過される。重力濾過された汚泥は濃縮汚泥Ｂとして無端ベルト６３上から排出部６７へ排出される。この際、無端ベルト６３の走行速度は常に一定に保たれていた。   According to this, the sludge A to be concentrated is formed on a floc with the flocculant 72, then supplied onto the endless belt 63 rotating from the supply unit 66, and gravity filtered while being transported by the endless belt 63. The gravity-filtered sludge is discharged as concentrated sludge B from the endless belt 63 to the discharge portion 67. At this time, the traveling speed of the endless belt 63 was always kept constant.

しかしながら、上記の従来形式では、供給部６６から無端ベルト６３上に供給される濃縮対象汚泥Ａの濃度が大幅に変動した場合、この変動の影響を受けて、濃縮汚泥Ｂの濃度も大幅に変動し、安定した運転が困難であるといった問題がある。
特許第３５０４２５２号 However, in the above-described conventional format, when the concentration of the concentration target sludge A supplied from the supply unit 66 onto the endless belt 63 varies significantly, the concentration of the concentrated sludge B also varies greatly under the influence of this variation. However, there is a problem that stable operation is difficult.
Japanese Patent No. 3504252

本発明は、安定した運転が可能なベルト型濃縮機の制御方法を提供することを目的とする。   An object of the present invention is to provide a method for controlling a belt type concentrator capable of stable operation.

上記目的を達成するために、本第１発明は、透水性を有する回動自在な無端ベルト上に濃縮対象汚泥を供給し、
回動する無端ベルトによって濃縮対象汚泥を搬送しながら重力脱水し、
脱水後の濃縮汚泥を無端ベルト上から排出するベルト型濃縮機の制御方法であって、
予め、濃縮汚泥の濃度の下限値と固形物回収率の下限値とを設定し、
上記濃縮汚泥の濃度の下限値に対応する無端ベルトの走行速度を最低走行速度とし、
上記固形物回収率の下限値に対応する無端ベルトの走行速度を最高走行速度とし、
上記最低走行速度と最高走行速度との間を速度制御範囲としておき、
運転時、無端ベルト上から排出された上記濃縮汚泥の濃度を汚泥濃度検出手段により検出し、上記検出された濃縮汚泥の濃度が規定値よりも低くなると、上記速度制御範囲内において無端ベルトの走行速度を速くし、上記検出された濃縮汚泥の濃度が規定値よりも高くなると、上記速度制御範囲内において無端ベルトの走行速度を遅くするものである。 In order to achieve the above object, the first aspect of the present invention supplies sludge to be concentrated on a rotatable endless belt having water permeability.
Gravity dewatering while conveying the sludge to be concentrated by the rotating endless belt,
A method for controlling a belt-type concentrator that discharges concentrated sludge after dehydration from an endless belt,
Set the lower limit value of the concentration of concentrated sludge and the lower limit value of the solids recovery rate in advance,
The traveling speed of the endless belt corresponding to the lower limit value of the concentrated sludge concentration is set as the minimum traveling speed,
The traveling speed of the endless belt corresponding to the lower limit value of the solid matter recovery rate is the maximum traveling speed,
Between the minimum travel speed and the maximum travel speed is set as the speed control range,
During operation, the concentration of the concentrated sludge discharged from the endless belt is detected by the sludge concentration detector, when the detected concentration of the concentrated sludge was becomes lower than the prescribed value, the running of the endless belt within the speed control range When the speed is increased and the concentration of the detected concentrated sludge becomes higher than a specified value, the running speed of the endless belt is decreased within the speed control range .

これによると、無端ベルトの走行速度が速いほど、無端ベルト上に供給された濃縮対象汚泥の厚さが薄くなるため、濃縮対象汚泥中の水分が重力脱水され易くなり、汚泥の脱水性が向上する。また、固形物回収率は、無端ベルトの走行速度が速いほど、低下する。したがって、運転時、濃縮汚泥の濃度が規定値よりも低くなると、速度制御範囲内において無端ベルトの走行速度を速くすることにより、無端ベルト上に供給された濃縮対象汚泥の厚さが減少して薄くなるため、汚泥の脱水性が向上し、濃縮汚泥の濃度が高くなる。反対に、濃縮汚泥の濃度が規定値よりも高くなると、速度制御範囲内において無端ベルトの走行速度を遅くすることにより、無端ベルト上に供給された濃縮対象汚泥の厚さが増加して分厚くなるため、汚泥の脱水性が低下し、濃縮汚泥の濃度が低くなる。このようにして無端ベルトの走行速度を調節することにより、無端ベルト上に供給される濃縮対象汚泥の濃度が大幅に変動しても、濃縮汚泥の濃度をほぼ規定値に保つことができる。この際、上記速度制御範囲内で無端ベルトの走行速度を制御しているため、固形物回収率の大幅な低下が抑制され、安定した運転が可能になる。 According to this, as the running speed of the endless belt increases, the thickness of the sludge to be concentrated supplied onto the endless belt becomes thinner, so that the moisture in the sludge to be concentrated is easily dewatered by gravity and the sludge dewaterability is improved. To do. In addition, the solid matter recovery rate decreases as the traveling speed of the endless belt increases. Therefore, when the concentration of concentrated sludge becomes lower than the specified value during operation, the thickness of the sludge to be concentrated supplied on the endless belt decreases by increasing the running speed of the endless belt within the speed control range. Since it becomes thin, the dewaterability of sludge improves and the density | concentration of concentrated sludge becomes high. On the other hand, when the concentration of concentrated sludge becomes higher than the specified value, the thickness of the sludge to be concentrated supplied on the endless belt increases and becomes thicker by slowing the running speed of the endless belt within the speed control range. Therefore, the dewaterability of sludge falls and the density | concentration of concentrated sludge becomes low. By adjusting the traveling speed of the endless belt in this manner, the concentration of the concentrated sludge can be maintained at a specified value even when the concentration of the sludge to be concentrated supplied on the endless belt varies greatly. At this time, since the traveling speed of the endless belt is controlled within the speed control range, a significant reduction in the solids recovery rate is suppressed, and stable operation is possible.

さらに、本第２発明は、検出された濃縮汚泥の濃度が規定値よりも低くなると、速度制御範囲内において無端ベルトの走行速度を速くし、検出された濃縮汚泥の濃度が規定値に達すると、この時の無端ベルトの走行速度を維持し、
検出された濃縮汚泥の濃度が規定値よりも高くなると、上記速度制御範囲内において無端ベルトの走行速度を遅くし、検出された濃縮汚泥の濃度が規定値に達すると、この時の無端ベルトの走行速度を維持するものである。 Furthermore, when the concentration of the concentrated sludge detected is lower than the specified value , the second invention increases the traveling speed of the endless belt within the speed control range, and the detected concentration of the concentrated sludge reaches the specified value. , Maintain the running speed of the endless belt at this time,
When the detected concentration of concentrated sludge becomes higher than the specified value, the running speed of the endless belt is reduced within the speed control range. When the detected concentration of concentrated sludge reaches the specified value, the endless belt at this time It maintains the running speed .

本発明によると、無端ベルト上に供給される濃縮対象汚泥の濃度が大幅に変動しても、濃縮汚泥の濃度をほぼ規定値に保つことができる。この際、固形物回収率の大幅な低下が抑制されるため、安定した運転が可能になる。   According to the present invention, even if the concentration of the sludge to be concentrated supplied on the endless belt fluctuates significantly, the concentration of the concentrated sludge can be maintained at a specified value. At this time, since a significant decrease in the solids recovery rate is suppressed, stable operation is possible.

以下、本発明における実施の形態を図面に基づいて説明する。
尚、先に述べた従来のものと同一の部材は同じ符号を付記して説明を省略する。
図１に示すように、１はベルト型濃縮機であり、従来の図３に示したものと主要構成が同じである。このベルト型濃縮機１には、排出部６７に排出された濃縮汚泥Ｂの濃度を検出する汚泥濃度検出手段の一例である濃縮汚泥濃度検出装置２（濃度計）が設けられている。また、上記濃縮汚泥濃度検出装置２によって検出された濃縮汚泥Ｂの濃度と予め設定した規定値との差を演算する演算装置３と、演算装置３において求められた濃縮汚泥Ｂの濃度と規定値との差に基づいてベルト型濃縮機１のモータ６５を制御する制御装置４とが設けられている。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
The same members as those of the conventional one described above are denoted by the same reference numerals and description thereof is omitted.
As shown in FIG. 1, reference numeral 1 denotes a belt type concentrator, which has the same main configuration as that shown in FIG. The belt type concentrator 1 is provided with a concentrated sludge concentration detection device 2 (concentration meter) which is an example of a sludge concentration detection means for detecting the concentration of the concentrated sludge B discharged to the discharge portion 67. Further, a calculation device 3 for calculating the difference between the concentration of the concentrated sludge B detected by the concentrated sludge concentration detection device 2 and a preset specified value, and the concentration and the specified value of the concentrated sludge B obtained by the calculation device 3 And a control device 4 that controls the motor 65 of the belt-type concentrator 1 based on the difference between them.

これによると、モータ６５を作動させてローラ６２ｂを回転駆動させることにより、無端ベルト６３が回動する。そして、濃縮対象汚泥Ａに凝集剤７２を供給してフロックを形成し、フロックが形成された濃縮対象汚泥Ａを供給部６６から無端ベルト６３上に供給する。供給された濃縮対象汚泥Ａは無端ベルト６３で搬送されながら重力濾過され、濃縮汚泥Ｂとして無端ベルト６３上から排出部６７へ排出される。   According to this, the endless belt 63 rotates by operating the motor 65 to rotationally drive the roller 62b. Then, the flocculant 72 is supplied to the concentration target sludge A to form a floc, and the concentration target sludge A on which the floc is formed is supplied from the supply unit 66 onto the endless belt 63. The supplied concentration target sludge A is gravity filtered while being conveyed by the endless belt 63, and is discharged as concentrated sludge B from the endless belt 63 to the discharge portion 67.

この際、上記無端ベルト６３の走行速度に応じて、濃縮汚泥Ｂの濃度（％）と固形物回収率（％）とが変化する。図２のグラフＧ１は、無端ベルト６３の走行速度と濃縮汚泥Ｂの濃度との関係を示し、グラフＧ２は、無端ベルト６３の走行速度と固形物回収率との関係を示している。   At this time, the concentration (%) of the concentrated sludge B and the solid matter recovery rate (%) change according to the traveling speed of the endless belt 63. The graph G1 in FIG. 2 shows the relationship between the running speed of the endless belt 63 and the concentration of the concentrated sludge B, and the graph G2 shows the relationship between the running speed of the endless belt 63 and the solid matter recovery rate.

上記濃縮汚泥Ｂの濃度は、排出部６７から排出される汚泥中に占める固形物量の割合である。上記グラフＧ１に示すように、無端ベルト６３の走行速度が高速になるほど濃縮汚泥Ｂの濃度が上昇する。これは、無端ベルト６３の走行速度が高速になるほど、無端ベルト６３上の濃縮対象汚泥Ａの厚さＴ（高さ）が薄くなるため、水分が汚泥層内を通り抜け易くなり、脱水性が良好になるからである。   The concentration of the concentrated sludge B is the ratio of the amount of solids in the sludge discharged from the discharge part 67. As shown in the graph G1, the concentration of the concentrated sludge B increases as the traveling speed of the endless belt 63 increases. This is because, as the traveling speed of the endless belt 63 increases, the thickness T (height) of the sludge A to be concentrated on the endless belt 63 becomes thinner, so that moisture easily passes through the sludge layer and the dewaterability is good. Because it becomes.

また、上記固形物回収率は、無端ベルト６３に供給される濃縮対象汚泥Ａ中の固形物量に対する、濃縮汚泥Ｂとして回収した固形物量の割合であり、ベルト型濃縮機１の場合、下記の式（１）で示すことができる。   The solids recovery rate is the ratio of the amount of solids recovered as the concentrated sludge B to the amount of solids in the concentration target sludge A supplied to the endless belt 63. In the case of the belt type concentrator 1, the following formula It can be shown by (1).

Figure 0004498219
尚、ｓａは無端ベルト６３を透過して下方に排出されたろ液中に含まれる固形物量である。ｓｂは洗浄装置６９で無端ベルト６３を洗浄した際の洗浄排水に含まれる固形物量である。Ｓは無端ベルト６３上に供給される固形物量である。グラフＧ２に示すように、無端ベルト６３の走行速度が高速になるほど固形物回収率が低下する。また、無端ベルト６３の走行速度が速いほど、無端ベルト６３上の濃縮対象汚泥Ａの厚さＴは減少して薄くなり、無端ベルト６３の走行速度が遅いほど、上記濃縮対象汚泥Ａの厚さＴは増加して分厚くなる。
Figure 0004498219
 Here, sa is the amount of solid matter contained in the filtrate that has passed through the endless belt 63 and discharged downward. sb is the amount of solids contained in the cleaning waste water when the endless belt 63 is cleaned by the cleaning device 69. S is the amount of solids supplied on the endless belt 63. As shown in the graph G2, the solid matter recovery rate decreases as the traveling speed of the endless belt 63 increases. Further, as the traveling speed of the endless belt 63 increases, the thickness T of the concentration target sludge A on the endless belt 63 decreases and becomes thinner. As the traveling speed of the endless belt 63 decreases, the thickness of the concentration target sludge A increases. T increases and becomes thicker.

以下に、上記ベルト型濃縮機１の制御方法を説明する。
図２のグラフＧ１，Ｇ２において、予め、濃縮汚泥Ｂの濃度の下限値Ｃと固形物回収率の下限値Ｄとを設定し、上記下限値Ｃに対応する無端ベルト６３の走行速度を最低走行速度Ｅとし、上記下限値Ｄに対応する無端ベルト６３の走行速度を最高走行速度Ｆとし、上記最低走行速度Ｅと最高走行速度Ｆとの間を速度制御範囲Ｗとする。 Below, the control method of the said belt-type concentrator 1 is demonstrated.
In graphs G1 and G2 of FIG. 2, a lower limit value C of the concentration of the concentrated sludge B and a lower limit value D of the solid matter recovery rate are set in advance, and the travel speed of the endless belt 63 corresponding to the lower limit value C is set to the minimum travel The traveling speed of the endless belt 63 corresponding to the lower limit value D is the maximum traveling speed F, and the speed control range W is between the minimum traveling speed E and the maximum traveling speed F.

ベルト型濃縮機１を運転している時、上記濃縮汚泥濃度検出装置２によって濃縮汚泥Ｂの濃度が検出され、検出された濃縮汚泥Ｂの濃度と予め設定した規定値との差が演算装置３によって求められる。上記濃縮汚泥Ｂの濃度が規定値よりも低くなると、制御装置４は、モータ６５の回転速度を上げ、上記速度制御範囲Ｗ内において無端ベルト６３の走行速度を速くする。これにより、無端ベルト６３上の濃縮対象汚泥Ａの厚さＴが減少して薄くなるため、脱水性が向上し、濃縮汚泥Ｂの濃度が上昇する。そして、濃縮汚泥Ｂの濃度が規定値に達すると、この時の無端ベルト６３の走行速度を維持する。   When the belt type concentrator 1 is in operation, the concentrated sludge concentration detection device 2 detects the concentration of the concentrated sludge B, and the difference between the detected concentration of the concentrated sludge B and a preset specified value is the arithmetic device 3. Sought by. When the concentration of the concentrated sludge B becomes lower than the specified value, the control device 4 increases the rotational speed of the motor 65 and increases the traveling speed of the endless belt 63 within the speed control range W. Thereby, since the thickness T of the concentration target sludge A on the endless belt 63 decreases and becomes thinner, the dewaterability is improved and the concentration of the concentrated sludge B is increased. When the concentration of the concentrated sludge B reaches a specified value, the traveling speed of the endless belt 63 at this time is maintained.

反対に、上記濃縮汚泥Ｂの濃度が規定値よりも高くなると、制御装置４は、モータ６５の回転速度を下げ、上記速度制御範囲Ｗ内において無端ベルト６３の走行速度を遅くする。これにより、無端ベルト６３上の濃縮対象汚泥Ａの厚さＴが増加して分厚くなるため、脱水性が低下し、濃縮汚泥Ｂの濃度が低下する。そして、濃縮汚泥Ｂの濃度が規定値に達すると、この時の無端ベルト６３の走行速度を維持する。   On the other hand, when the concentration of the concentrated sludge B becomes higher than the specified value, the control device 4 decreases the rotational speed of the motor 65 and decreases the traveling speed of the endless belt 63 within the speed control range W. Thereby, since the thickness T of the concentration target sludge A on the endless belt 63 increases and becomes thicker, the dewaterability is reduced and the concentration of the concentrated sludge B is reduced. When the concentration of the concentrated sludge B reaches a specified value, the traveling speed of the endless belt 63 at this time is maintained.

このようにして無端ベルト６３の走行速度を調節することにより、無端ベルト６３上に供給される濃縮対象汚泥Ａの濃度が大幅に変動しても、濃縮汚泥Ｂの濃度をほぼ規定値に保つことができる。この際、上記速度制御範囲Ｗ内で無端ベルト６３の走行速度を制御しているため、固形物回収率の大幅な低下が抑制され、安定した運転が可能になる。   By adjusting the traveling speed of the endless belt 63 in this way, the concentration of the concentrated sludge B is maintained at a specified value even if the concentration of the concentration target sludge A supplied onto the endless belt 63 varies greatly. Can do. At this time, since the traveling speed of the endless belt 63 is controlled within the speed control range W, a significant decrease in the solids recovery rate is suppressed, and stable operation is possible.

上記実施の形態では、無端ベルト６３から排出部６７に排出された濃縮汚泥Ｂの濃度を濃縮汚泥濃度検出装置２で直接的に検出しているが、供給部６６から無端ベルト６３上へ供給される濃縮対象汚泥Ａの濃度を濃度計等の濃度検出装置で検出し、検出した濃縮対象汚泥Ａの濃度に基づいて濃縮汚泥Ｂの濃度を推定し間接的に求めてもよい。   In the above embodiment, the concentration of the concentrated sludge B discharged from the endless belt 63 to the discharge portion 67 is directly detected by the concentrated sludge concentration detection device 2, but supplied from the supply portion 66 onto the endless belt 63. The concentration target sludge A may be detected by a concentration detector such as a densitometer, and the concentration of the concentrated sludge B may be estimated indirectly based on the detected concentration of the target sludge A.

上記実施の形態ではモータ６５で排出側のローラ６２ｂを回転駆動させているが、供給側のローラ６２ａを回転駆動させてもよい。   In the above embodiment, the discharge roller 62b is driven to rotate by the motor 65, but the supply roller 62a may be driven to rotate.

本発明の第１の実施の形態におけるベルト型濃縮機の制御系の模式図である。It is a schematic diagram of the control system of the belt type concentrator in the 1st Embodiment of this invention. 同、ベルト型濃縮機の無端ベルトの走行速度と濃縮汚泥濃度との関係および上記走行速度と固形物回収率との関係を示すグラフである。4 is a graph showing the relationship between the traveling speed of the endless belt and the concentrated sludge concentration of the belt type concentrator and the relationship between the traveling speed and the solids recovery rate. 従来のベルト型濃縮機の構成を示す側面図である。It is a side view which shows the structure of the conventional belt type concentrator.

符号の説明Explanation of symbols

１ ベルト型濃縮機
６３ 無端ベルト
Ａ 濃縮対象汚泥
Ｂ 濃縮汚泥
Ｃ 濃縮汚泥の濃度の下限値
Ｄ 固形物回収率の下限値
Ｅ 最低走行速度
Ｆ 最高走行速度
Ｗ 速度制御範囲 1 Belt type concentrator 63 Endless belt A Concentrated sludge B Concentrated sludge C Concentrated sludge lower limit value D Solid matter recovery lower limit value E Minimum traveling speed F Maximum traveling speed W Speed control range

Claims (2)

透水性を有する回動自在な無端ベルト上に濃縮対象汚泥を供給し、
回動する無端ベルトによって濃縮対象汚泥を搬送しながら重力脱水し、
脱水後の濃縮汚泥を無端ベルト上から排出するベルト型濃縮機の制御方法であって、
予め、濃縮汚泥の濃度の下限値と固形物回収率の下限値とを設定し、
上記濃縮汚泥の濃度の下限値に対応する無端ベルトの走行速度を最低走行速度とし、
上記固形物回収率の下限値に対応する無端ベルトの走行速度を最高走行速度とし、
上記最低走行速度と最高走行速度との間を速度制御範囲としておき、
運転時、無端ベルト上から排出された上記濃縮汚泥の濃度を汚泥濃度検出手段により検出し、上記検出された濃縮汚泥の濃度が規定値よりも低くなると、上記速度制御範囲内において無端ベルトの走行速度を速くし、上記検出された濃縮汚泥の濃度が規定値よりも高くなると、上記速度制御範囲内において無端ベルトの走行速度を遅くすることを特徴とするベルト型濃縮機の制御方法。 Supply the sludge to be concentrated on a rotatable endless belt with water permeability,
Gravity dewatering while conveying the sludge to be concentrated by the rotating endless belt,
A method for controlling a belt-type concentrator that discharges concentrated sludge after dehydration from an endless belt,
Set the lower limit value of the concentration of concentrated sludge and the lower limit value of the solids recovery rate in advance,
The traveling speed of the endless belt corresponding to the lower limit value of the concentrated sludge concentration is set as the minimum traveling speed,
The traveling speed of the endless belt corresponding to the lower limit value of the solid matter recovery rate is the maximum traveling speed,
Between the minimum travel speed and the maximum travel speed is set as the speed control range,
During operation, the concentration of the concentrated sludge discharged from the endless belt is detected by the sludge concentration detecting means, and when the detected concentration of the concentrated sludge becomes lower than a specified value , the endless belt runs within the speed control range. A control method for a belt type concentrator, characterized in that when the speed is increased and the detected concentration of the concentrated sludge becomes higher than a specified value, the running speed of the endless belt is decreased within the speed control range . 検出された濃縮汚泥の濃度が規定値よりも低くなると、速度制御範囲内において無端ベルトの走行速度を速くし、検出された濃縮汚泥の濃度が規定値に達すると、この時の無端ベルトの走行速度を維持し、
検出された濃縮汚泥の濃度が規定値よりも高くなると、上記速度制御範囲内において無端ベルトの走行速度を遅くし、検出された濃縮汚泥の濃度が規定値に達すると、この時の無端ベルトの走行速度を維持することを特徴とする請求項１記載のベルト型濃縮機の制御方法。 When the concentration of the concentrated sludge detected is lower than the specified value, the travel speed of the endless belt is increased within the speed control range. When the concentration of the concentrated sludge reaches the specified value, the endless belt travels at this time. Maintain speed,
When the detected concentration of concentrated sludge becomes higher than the specified value, the running speed of the endless belt is reduced within the speed control range. When the detected concentration of concentrated sludge reaches the specified value, the endless belt at this time 2. The belt type concentrator control method according to claim 1, wherein the running speed is maintained .
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JPS62207599A (en) * 1986-03-05 1987-09-11 Ebara Infilco Co Ltd Belt press type dehydrator
JPS62146596U (en) * 1986-03-11 1987-09-16
JPS63170098U (en) * 1987-04-22 1988-11-04
JPH0217209U (en) * 1988-07-14 1990-02-05
JPH11151419A (en) * 1997-11-19 1999-06-08 Mitsubishi Heavy Ind Ltd Control method of belt filter
JP2003275507A (en) * 2002-03-25 2003-09-30 Kubota Corp Structure of sludge feed part in belt type concentrator

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Publication number Priority date Publication date Assignee Title
JPS62207599A (en) * 1986-03-05 1987-09-11 Ebara Infilco Co Ltd Belt press type dehydrator
JPS62146596U (en) * 1986-03-11 1987-09-16
JPS63170098U (en) * 1987-04-22 1988-11-04
JPH0217209U (en) * 1988-07-14 1990-02-05
JPH11151419A (en) * 1997-11-19 1999-06-08 Mitsubishi Heavy Ind Ltd Control method of belt filter
JP2003275507A (en) * 2002-03-25 2003-09-30 Kubota Corp Structure of sludge feed part in belt type concentrator

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