TW202115379A - Monitoring device and monitoring method for belt press dehydration system, and control device - Google Patents

Monitoring device and monitoring method for belt press dehydration system, and control device Download PDF

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TW202115379A
TW202115379A TW109131456A TW109131456A TW202115379A TW 202115379 A TW202115379 A TW 202115379A TW 109131456 A TW109131456 A TW 109131456A TW 109131456 A TW109131456 A TW 109131456A TW 202115379 A TW202115379 A TW 202115379A
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belt
value
dehydration system
monitoring device
index value
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鈴木瑞季
井上健
長尾信明
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日商栗田工業股份有限公司
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/04—Filters with filtering elements which move during the filtering operation with filtering bands or the like supported on cylinders which are impervious for filtering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D37/00—Processes of filtration
    • B01D37/04—Controlling the filtration
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00—Treatment of sludge; Devices therefor
    • C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • C02F11/123—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using belt or band filters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/47—Scattering, i.e. diffuse reflection
    • G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid

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  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Sludge (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Filtration Of Liquid (AREA)
  • Separation Of Suspended Particles By Flocculating Agents (AREA)

Abstract

Provided are: a monitoring system and a monitoring method that allow accurate monitoring of sludge release properties of a belt press dehydrator; and a control device for the belt press dehydrator that can appropriately control the belt press dehydrator on the basis of the results of this monitoring. This monitoring device for a belt press dehydration system includes a measurement means for an index value corresponding to the state of solids in filter cloth belt washing wastewater of a belt press dehydrator 10, wherein the measurement means includes an irradiation unit that irradiates the filter cloth belt washing wastewater with laser light and a light receiving unit that receives scattered light, and the measurement means determines the index value on the basis of change over time in a scattered light intensity signal.

Description

帶式壓榨脫水系統的監視裝置、監視方法以及控制裝置Monitoring device, monitoring method and control device of belt squeezing dewatering system

本發明是有關於一種藉由帶式壓榨對污泥進行脫水處理的系統的監視及控制。The invention relates to the monitoring and control of a system for dewatering sludge through belt pressing.

於使用帶式壓榨脫水機的脫水處理中，為了進行穩定的脫水處理，要求適當地評價脫水餅（cake）的剝離性。有效的是藉由增加無機凝聚劑或高分子凝聚劑的注入量來改善脫水餅的剝離性的方法，但困難的是於投入時間點用數值表示藉由投入何種程度的藥劑而有何種程度的改善效果。實際上，於投入藥劑後，對於脫水餅的剝離性，藉由目視判斷了帶式壓榨脫水機的濾布的污垢情況。此種方法是僅能夠於人在現場時進行的方法，因此難以連續監視。In the dehydration process using a belt press dehydrator, in order to perform a stable dehydration process, it is required to appropriately evaluate the peelability of the dehydrated cake. It is effective to increase the amount of inorganic flocculant or polymer flocculant injected to improve the peelability of the dehydrated cake. However, it is difficult to use a numerical value at the time of injection to indicate what level of agent is injected. The degree of improvement. In fact, after the chemical was injected, the peelability of the dehydrated cake was visually judged for the dirtiness of the filter cloth of the belt press dehydrator. This method is a method that can only be performed when people are on site, so it is difficult to continuously monitor.

於專利文獻1中記載了藉由測定濾布的通氣度來評價剝離性。 但是，剝離性的評價需要於濾布的大範圍內進行評價，因此為了於大範圍內測定通氣度需要大型的裝置。另外，於污泥部分地充分剝離的濾布中，由於流體於該部分集中地穿過，因此難以藉由通氣性正確地評價剝離性。Patent Document 1 describes the evaluation of peelability by measuring the air permeability of the filter cloth. However, the evaluation of peelability needs to be evaluated in a wide range of the filter cloth, and therefore, a large-scale device is required in order to measure the air permeability in a wide range. In addition, in the filter cloth in which the sludge is partially peeled off sufficiently, since the fluid passes through the portion intensively, it is difficult to accurately evaluate the peelability based on the air permeability.

於專利文獻2中記載了藉由測定濾布清洗排水中的懸浮物質濃度來評價剝離性。 但是，濾布清洗排水中的懸浮物質有時以塊的形式存在，因此未必均勻地分散於液體中。因此，濾布清洗排水中的懸浮物質的濃度無法藉由通常的光學式混合液懸浮固體濃度（Mixed liquid suspended solids，MLSS）計適當地測定。Patent Document 2 describes that the releasability is evaluated by measuring the concentration of suspended matter in the filter cloth washing drainage. However, the suspended matter in the filter cloth washing drainage sometimes exists in the form of blocks, so it may not be uniformly dispersed in the liquid. Therefore, the concentration of suspended solids in the filter cloth cleaning drainage cannot be properly measured by the usual optical mixed liquid suspended solids (MLSS) meter.

因此，先前，濾布清洗排水中的懸浮物質濃度是藉由過濾分離重量測定法等進行分析。 但是，於過濾分離重量測定方法等方法中，為了連續地進行測定而裝置變為大規模。Therefore, previously, the concentration of suspended matter in the waste water of filter cloth washing was analyzed by filtration separation gravimetric method or the like. However, in methods such as the filtration separation weight measurement method, the device becomes large-scale in order to continuously perform the measurement.

於專利文獻3中記載有使用凝聚狀態監測感測器來控制凝聚劑添加的情況，所述凝聚狀態監測感測器將雷射光朝向水中照射，並接收藉由水中的絮凝物等散射的散射光來測定凝聚狀態。 [現有技術文獻] [專利文獻]Patent Document 3 describes the use of an aggregation state monitoring sensor to control the addition of agglomerating agent. The aggregation state monitoring sensor irradiates laser light toward the water and receives scattered light scattered by flocs and the like in the water. To determine the state of aggregation. [Prior Art Literature] [Patent Literature]

專利文獻1：日本專利特公昭63-29639號公報 專利文獻2：日本專利特公昭3-80080號公報 專利文獻3：日本專利特開2017-26438號公報Patent Document 1: Japanese Patent Publication No. 63-29639 Patent Document 2: Japanese Patent Publication No. 3-80080 Patent Document 3: Japanese Patent Laid-Open No. 2017-26438

[發明所欲解決之課題] 本發明的目的在於提供一種可準確地監視帶式壓榨脫水機的污泥剝離性的帶式壓榨脫水系統的監視裝置及監視方法、以及能夠基於該監視結果適當地控制帶式壓榨脫水機的帶式壓榨脫水機的控制裝置。 [解決課題之手段][The problem to be solved by the invention] The object of the present invention is to provide a monitoring device and monitoring method for a belt press dewatering system that can accurately monitor the sludge peelability of a belt press dewatering machine, and a belt press dewatering machine capable of appropriately controlling the belt press dewatering machine based on the monitoring result. The control device of the squeezing dewatering machine. [Means to solve the problem]

本發明的帶式壓榨脫水系統的監視裝置具有與帶式壓榨脫水機的濾布帶清洗排水中的固形物的狀態對應的指標值的測定單元，且所述帶式壓榨脫水系統的監視裝置中，所述測定單元具有向濾布帶清洗排水中照射雷射光的照射部及接收散射光的受光部，且根據散射光強度訊號的時間變化來求出所述指標值。The monitoring device of the belt squeezing dehydration system of the present invention has a measuring unit for the index value corresponding to the state of the solids in the filter cloth belt cleaning drainage of the belt squeezing dehydrator, and the monitoring device of the belt squeezing dehydration system The measuring unit has an irradiating part that irradiates laser light to the filter cloth cleaning drainage and a light receiving part that receives scattered light, and obtains the index value based on the time change of the scattered light intensity signal.

本發明的帶式壓榨脫水系統的監視方法是使用本發明的帶式壓榨脫水系統的監視裝置，並基於所述指標值進行帶式壓榨脫水系統的監視。The monitoring method of the belt type dewatering system of the present invention uses the monitoring device of the belt type dewatering system of the present invention, and monitors the belt type dewatering system based on the index value.

本發明的帶式壓榨脫水機的控制裝置使用本發明的帶式壓榨脫水系統的監視裝置，並以所述指標值成為規定值或規定範圍內的方式控制向被處理污泥的凝聚劑添加量。The control device of the belt squeeze dewatering machine of the present invention uses the monitoring device of the belt squeeze dewatering system of the present invention, and controls the amount of coagulant added to the treated sludge so that the index value becomes a predetermined value or within a predetermined range .

於本發明的一形態中，基於所述散射光強度訊號的時間積分值來設定所述指標值。In one aspect of the present invention, the index value is set based on the time integrated value of the scattered light intensity signal.

於本發明的一形態中，基於所述散射光強度訊號的每規定時間的底值來設定所述指標值。In one aspect of the present invention, the index value is set based on the bottom value of the scattered light intensity signal every predetermined time.

於本發明的一形態中，檢測規定時間內的所述散射光強度訊號的峰值的數量，並基於在規定時間內累計各峰值的訊號強度而得的值來設定所述指標值。In one aspect of the present invention, the number of peaks of the scattered light intensity signal within a predetermined time is detected, and the index value is set based on the value obtained by accumulating the signal intensity of each peak within the predetermined time.

於本發明的一形態中，求出所述散射光強度訊號的極大值與極小值之差（強度差），並基於規定時間內的強度差的累計值來設定所述指標值。 [發明的效果]In one aspect of the present invention, the difference (intensity difference) between the maximum value and the minimum value of the scattered light intensity signal is calculated, and the index value is set based on the cumulative value of the intensity difference within a predetermined time. [Effects of the invention]

本發明者發現，藉由專利文獻3中記載的凝聚狀態監測感測器，可評價帶式壓榨濾布清洗排水中的固形物的狀態（固形物量或粒徑分佈的相對資訊）。The present inventors discovered that the aggregation state monitoring sensor described in Patent Document 3 can evaluate the state of solids (relative information on the amount of solids or particle size distribution) in the belt press filter cloth cleaning drainage.

於脫水餅自濾布的剝離性劣化的情況下，脫水餅會黏附於濾布上而殘留。殘留於該濾布上的脫水餅被清洗水洗掉，並包含於濾布清洗排水中。因此，濾布清洗排水中所包含的固形物量越多，剝離性越劣化。濾布清洗排水中的固形物量的增加可於使用該凝聚狀態監測感測器進行測定的情況下，以伴隨一定以上的散射光強度的訊號波形的出現率上升的形式進行檢測。When the peelability of the dehydrated cake from the filter cloth is deteriorated, the dehydrated cake will stick to the filter cloth and remain. The dehydrated cake remaining on the filter cloth is washed away by washing water and contained in the filter cloth washing drainage. Therefore, the greater the amount of solids contained in the filter cloth washing drainage, the more the releasability deteriorates. The increase in the amount of solids in the filter cloth washing drainage can be detected in the form of an increase in the appearance rate of the signal waveform accompanied by a certain or more scattered light intensity when the aggregation state monitoring sensor is used for measurement.

另外，於產生背漏（凝聚不良的污泥液呈通透狀（此處的「通透狀」是指將水加入笳籬，則水汩汩地通過的模樣）透過濾布）或側漏（污泥液自濾布的兩側流出）現象時，於濾布清洗排水中源自固化前的泥狀態的污泥的微小粒子的量增加。藉此，於該凝聚狀態監測感測器的輸出中，一定位準以下的散射光強度的訊號波形的出現率上升，或者整體的訊號基本位準上升。In addition, back leakage (poorly coagulated sludge liquid is permeable ("permeable" here means that when water is added to the fence, the water will pass through the filter cloth)) or side leakage ( When the sludge liquid flows out from both sides of the filter cloth) phenomenon, the amount of fine particles derived from the sludge before solidification in the filter cloth washing drainage increases. As a result, in the output of the aggregation state monitoring sensor, the occurrence rate of the signal waveform of the scattered light intensity below a fixed level increases, or the overall basic signal level increases.

根據本發明，藉由將脫水餅的剝離性或背漏等運轉上的故障現象數值化，並設置運轉時相對於運轉故障事象的目標值，可連續地控制凝聚劑的注入量或濾布進給速度等脫水機運轉條件。According to the present invention, by digitizing operational failure phenomena such as the peelability of the dehydrated cake or back leakage, and setting a target value relative to the failure event during operation, it is possible to continuously control the injection amount of the coagulant or the feed of the filter cloth. Give the speed and other operating conditions of the dehydrator.

以下，參照圖式對實施方式的帶式壓榨脫水系統進行說明。Hereinafter, the belt press dewatering system of the embodiment will be described with reference to the drawings.

如圖1般，於該帶式壓榨脫水系統中，作為被處理污泥的原污泥經由具有流量計2的流入管1而導入至第一凝聚槽3，藉由第一藥液注入裝置4添加無機凝聚劑。於第一凝聚槽3設置有攪拌機3a。As shown in Figure 1, in the belt-type squeezing dewatering system, the raw sludge as the sludge to be treated is introduced into the first agglomeration tank 3 through the inflow pipe 1 with the flow meter 2, and the first chemical liquid injection device 4 Add inorganic coagulant. The first aggregating tank 3 is provided with a mixer 3a.

於第一凝聚槽3內經凝聚處理的液體（第一凝聚處理液）經由移流口（或移流管）而導入至第二凝聚槽5，藉由第二藥液注入裝置6來添加高分子凝聚劑。於第二凝聚槽5設置有攪拌機5a。The liquid that has been coagulated in the first coagulation tank 3 (first coagulation treatment liquid) is introduced into the second coagulation tank 5 through the transfer port (or pipette), and the polymer coagulant is added by the second chemical liquid injection device 6 . In the second aggregation tank 5, a mixer 5a is installed.

作為無機凝聚劑，可列舉：氯化鐵、硫酸鐵、聚氯化鐵、聚硫酸鐵等鐵系無機凝聚劑或氯化鋁、聚氯化鋁、硫酸帶、氫氧化鋁、氧化鋁等鋁系無機凝聚劑。Examples of inorganic flocculants include: iron-based inorganic flocculants such as ferric chloride, ferric sulfate, polyferric chloride, and polyferric sulfate, or aluminum chloride, polyaluminum chloride, sulfuric acid tape, aluminum hydroxide, and aluminum oxide. Department of inorganic coagulant.

作為高分子凝聚劑，較佳為陽離子性或兩性高分子凝聚劑，特佳為陽離子性高分子凝聚劑。作為陽離子性高分子凝聚劑，可列舉：二甲基胺基乙基丙烯酸酯或其四級化物、二甲基胺基乙基甲基丙烯酸酯或其四級化物等陽離子性單體的單獨聚合物或與丙烯醯胺的共聚物、聚乙烯基脒、聚（二烯丙基二甲基氯化銨）、聚乙烯亞胺、聚烯丙基胺、聚乙烯胺、聚（2-乙烯基-1-甲基吡啶鎓鹽）、二烷基胺-表氯醇縮聚物、聚離胺酸、聚葡萄胺糖（chitosan）、二乙基胺基乙基聚葡萄糖等。As the polymer flocculant, a cationic or amphoteric polymer flocculant is preferred, and a cationic polymer flocculant is particularly preferred. Examples of the cationic polymer flocculant include: single polymerization of cationic monomers such as dimethylaminoethyl acrylate or its quaternary product, dimethylaminoethyl methacrylate or its quaternary product Or copolymers with acrylamide, polyvinyl amidine, poly(diallyldimethylammonium chloride), polyethyleneimine, polyallylamine, polyvinylamine, poly(2-vinylamine) -1-methylpyridinium salt), dialkylamine-epichlorohydrin polycondensate, polylysine, chitosan, diethylaminoethyl polyglucose, etc.

作為兩性高分子凝聚劑，可使用二甲基胺基乙基丙烯酸酯或其四級化物、或二甲基胺基乙基甲基丙烯酸酯或其四級化物等陽離子性單體、丙烯醯胺等非離子性單體、丙烯酸或其鹽等共聚物。As the amphoteric polymer flocculant, cationic monomers such as dimethylaminoethyl acrylate or its quaternary product, or dimethylaminoethyl methacrylate or its quaternary product, and acrylamide can be used. Copolymers such as nonionic monomers, acrylic acid or its salts.

於第二凝聚槽5內經凝聚處理的污泥經由移送管9輸送至帶式壓榨脫水機10。The sludge coagulated in the second coagulation tank 5 is transported to the belt press dehydrator 10 via the transfer pipe 9.

於圖1中，設置有凝聚槽3、凝聚槽5，但亦可於配管1中添加無機凝聚劑，省略凝聚槽3。In FIG. 1, the aggregation tank 3 and the aggregation tank 5 are provided, but an inorganic aggregation agent may be added to the pipe 1 and the aggregation tank 3 may be omitted.

於圖1中，於第二凝聚槽5中添加高分子凝聚劑，但亦可設置第二配管來代替第二凝聚槽5，於該第二配管中添加高分子凝聚劑。In Fig. 1, the polymer flocculant is added to the second flocculation tank 5, but a second pipe may be provided instead of the second flocculation tank 5, and the polymer flocculant is added to the second pipe.

帶式壓榨脫水機10包括環狀轉動的下側濾布帶及上側濾布帶。凝聚污泥被夾壓於兩者之間，並進行脫水。脫水餅被自濾布剝離並取出。The belt squeeze dehydrator 10 includes a lower filter cloth belt and an upper filter cloth belt that rotate in a loop. The coagulated sludge is sandwiched between the two and dewatered. The dehydrated cake is peeled from the filter cloth and taken out.

濾布帶的清洗排水的一部分經由配管11而輸送至測量槽12。於測量槽12設置有凝聚狀態監測感測器20，其檢測訊號被輸入至控制器8。控制器8基於該檢測訊號來控制第一藥液注入裝置4及第二藥液注入裝置6。A part of the cleaning drainage of the filter tape is sent to the measuring tank 12 via the pipe 11. The measurement tank 12 is provided with a coalescence state monitoring sensor 20, the detection signal of which is input to the controller 8. The controller 8 controls the first chemical liquid injection device 4 and the second chemical liquid injection device 6 based on the detection signal.

凝聚狀態監測感測器20較佳為使用專利文獻3所記載者。圖2表示該凝聚狀態監測感測器的探針部分的結構。該探針具有：塊21，具有正交的面21a、面21b及它們相交的頂部21c；發光部22，沿著面21a設置且向凝聚處理液照射雷射光；受光部23，沿著面21b設置且使受光光軸與該發光部22的發光光軸成正交方向。 為了進行發光部22的發光動作及受光部23的受光訊號的解析，凝聚狀態監測感測器20包括發光電路、檢波電路及測量電路（省略圖示）。測量電路具有定時電路、類比/數位（Analog to Digital，A/D）轉換部、運算部等。The aggregation state monitoring sensor 20 is preferably one described in Patent Document 3. Fig. 2 shows the structure of the probe part of the aggregation state monitoring sensor. The probe has: a block 21 with orthogonal faces 21a, 21b, and the top 21c where they intersect; a light emitting part 22 arranged along the face 21a and irradiating laser light to the agglomeration treatment liquid; a light receiving part 23 along the face 21b It is installed so that the light-receiving optical axis and the light-emitting optical axis of the light-emitting portion 22 are in an orthogonal direction. In order to perform the light-emitting operation of the light-emitting unit 22 and the analysis of the light-receiving signal of the light-receiving unit 23, the aggregation state monitoring sensor 20 includes a light-emitting circuit, a detection circuit, and a measurement circuit (not shown). The measurement circuit has a timing circuit, an analog/digital (Analog to Digital, A/D) conversion unit, a calculation unit, and so on.

與專利文獻3同樣地，自發光部22照射至頂部21c附近的測量區域A的雷射光被測量區域A內的粒子散射，該散射光由受光部23接收。基於該受光強度的經時變化測量凝聚狀態。塊21包含不透明材料。As in Patent Document 3, the laser light irradiated from the light emitting unit 22 to the measurement area A near the top 21c is scattered by the particles in the measurement area A, and the scattered light is received by the light receiving unit 23. The aggregation state is measured based on the temporal change of the received light intensity. Block 21 contains opaque material.

發光電路根據來自定時電路的訊號而對發光部發送具有一定的調製頻率的電訊號，來進行雷射發光。發光部根據來自發光電路的訊號而發出雷射光。受光部接收雷射光照射水中的懸濁物而產生的散射光，並將所述散射光轉換為電訊號。檢波電路自來自受光部的電訊號除去調製成分，並輸出與散射光強度對應的受光電壓。The light-emitting circuit transmits an electrical signal with a certain modulation frequency to the light-emitting part based on the signal from the timing circuit to perform laser light emission. The light-emitting part emits laser light according to the signal from the light-emitting circuit. The light receiving unit receives scattered light generated by irradiating suspended objects in water with laser light, and converts the scattered light into an electrical signal. The detection circuit removes the modulation component from the electrical signal from the light receiving unit, and outputs a light receiving voltage corresponding to the intensity of the scattered light.

測量電路將用以發光的訊號（特定的頻率調製波）發送至發光電路，並且將來自檢波電路的訊號轉換成數位訊號，進行邏輯運算，而輸出與凝聚有關的資訊。The measuring circuit sends the light-emitting signal (specific frequency modulated wave) to the light-emitting circuit, and converts the signal from the detection circuit into a digital signal, performs logical operations, and outputs information related to aggregation.

作為凝聚狀態監測感測器20，可較佳地使用專利文獻3的監測裝置，特佳使用申請了專利的日本專利第6281534號公報中記載的監測裝置，但並不限定於此。As the aggregation state monitoring sensor 20, the monitoring device of Patent Document 3 can be preferably used, and the monitoring device described in the patented Japanese Patent No. 6281534 is particularly preferably used, but it is not limited to this.

日本專利第6281534號的凝聚監測裝置是 「一種凝聚監測裝置，對經凝聚處理的被處理水的處理狀態進行監視，所述凝聚監測裝置的特徵在於包括： 測量光照射部，將測量光照射至所述被處理水的測量區域； 散射光受光部，接收藉由位於所述測量區域的所述被處理水的粒子產生的散射光；以及 測量值運算部，包含測量由所述散射光受光部所獲得的受光訊號的振幅的振幅測量單元，對所測量的所述振幅的出現進行監視及統計，來算出特定的振幅的發生率或發生頻度，而算出與表示所述被處理水中的絮凝物粒徑的所述被處理水的凝聚相關的指標， 所述振幅測量單元檢測所述受光訊號自上升朝下降變化的第一變曲點及自下降朝上升變化的第二變曲點，並根據所述第一變曲點及所述第二變曲點的位準差而測量所述振幅」。The agglomeration monitoring device of Japanese Patent No. 6281534 is "A coagulation monitoring device that monitors the processing state of treated water after coagulation treatment, and the characteristics of the coagulation monitoring device include: The measuring light irradiation part irradiates the measuring light to the measurement area of the water to be treated; A scattered light receiving unit that receives scattered light generated by the particles of the water to be treated located in the measurement area; and The measured value calculation unit includes an amplitude measuring unit that measures the amplitude of the received light signal obtained by the scattered light receiving unit, and monitors and counts the occurrence of the measured amplitude to calculate the occurrence rate or occurrence of a specific amplitude Frequency, and calculate an index related to the aggregation of the water to be treated, which represents the particle size of the flocs in the water to be treated, The amplitude measurement unit detects a first inflection point that changes from rising to falling and a second inflection point that changes from falling to rising of the light-receiving signal, and according to the first inflection point and the second inflection point The level difference of the point is measured and the amplitude is measured."

圖3是表示圖2的測量區域A中的與雷射光L的光軸垂直的剖面的示意圖。如圖3般，於某個時間點，於測量區域A中存在五個粒子。於所述時間點，照射至測量區域A的雷射光被各粒子散射，散射光S入射至受光部23。於自該時間點起經過規定時間Δt（較佳為自0.1 mSec～10 mSec之間選定的時間。例如，約1 mSec）的時間點，測量區域A中存在的粒子數發生變動。理論上，有時粒子數亦不發生變化，但由於粒子進行布朗運動（Brownian movement），並且向測量槽12內連續地注入液體，因此通常該粒子數發生變動。FIG. 3 is a schematic diagram showing a cross section perpendicular to the optical axis of the laser light L in the measurement area A of FIG. 2. As shown in Figure 3, at a certain point in time, there are five particles in the measurement area A. At the time point, the laser light irradiated to the measurement area A is scattered by the particles, and the scattered light S enters the light receiving unit 23. At a time point when a predetermined time Δt (preferably a time selected between 0.1 mSec and 10 mSec. For example, about 1 mSec) has elapsed from this point in time, the number of particles present in the measurement area A fluctuates. Theoretically, sometimes the number of particles does not change. However, since the particles perform Brownian movement and the liquid is continuously injected into the measuring tank 12, the number of particles usually changes.

若粒子數發生變動，則散射光強度與之連動地發生變動，從而受光部23的受光強度發生變動。If the number of particles fluctuates, the scattered light intensity fluctuates in conjunction therewith, and the received light intensity of the light receiving unit 23 fluctuates.

粒子的粒徑越大，一個粒子出入測量區域A時的所述受光強度的變動幅度越大。因此，可根據該受光強度的變動幅度，檢測出入測量區域A的粒子的粒徑大小。即，任意時刻tk 的受光強度與經過Δt後的時刻tk+1 的受光強度之差為和於該Δt期間出入測量區域A的粒子的表面積成比例的值。The larger the particle size of the particle, the larger the fluctuation range of the received light intensity when one particle enters and exits the measurement area A. Therefore, the particle size of the particles entering and leaving the measurement area A can be detected based on the fluctuation range of the received light intensity. That is, the difference between the received light intensity at any time t k and the received light intensity at time t k+1 after Δt has passed is a value proportional to the surface area of the particles entering and leaving the measurement area A during the Δt period.

圖4表示對凝聚狀態監測感測器的散射光強度進行訊號處理而獲得的凝聚狀態監測感測器輸出訊號（受光訊號強度）的經時變化的一例。圖4中的輸出訊號是與受光部23的受光強度（散射光強度）成比例的值，單位例如為mV。FIG. 4 shows an example of the time-dependent change of the output signal (light-receiving signal intensity) of the aggregation state monitoring sensor obtained by signal processing the scattered light intensity of the aggregation state monitoring sensor. The output signal in FIG. 4 is a value proportional to the received light intensity (scattered light intensity) of the light receiving unit 23, and the unit is, for example, mV.

於本實施方式中，為了抑制感測器的發光元件的消耗，使發光元件間歇地運作。作為一例，如圖5般，以於200 mSec發光動作後停止1800 mSec的方式，按照2秒1次的速度發光。200 mSec、1800 mSec及2秒為一例，並不限定於此。In this embodiment, in order to suppress the consumption of the light-emitting element of the sensor, the light-emitting element is operated intermittently. As an example, as shown in Fig. 5, light is emitted at a rate of once every 2 seconds by stopping 1800 mSec after the 200 mSec light-emitting operation. 200 mSec, 1800 mSec, and 2 seconds are examples, and they are not limited to this.

於本實施方式中，基於凝聚狀態監測感測器20的受光強度來評價濾布帶清洗排水中的固形物量，將該固形物量作為脫水餅自濾布的剝離性的指標，進行無機凝聚劑及高分子凝聚劑的添加控制。In this embodiment, the amount of solids in the filter cloth belt cleaning drainage is evaluated based on the light intensity of the aggregation state monitoring sensor 20, and the solids amount is used as an indicator of the peelability of the dehydrated cake from the filter cloth, and the inorganic coagulant and Addition control of polymer flocculant.

根據凝聚狀態監測感測器的受光訊號強度評價濾布帶清洗排水中的固形物量的方法的第一形態為如下方法：如圖5般，利用時間對受光訊號強度進行積分，并且該積分值越大，判定為固形物量越多。於圖5中，如時刻T（mSec）～時刻T+200（mSec）間、時刻T+2000（mSec）～時刻T+2200（mSec）間…般對200 mSec的發光期間的受光訊號強度進行積分。即，經時地測定圖5中帶有點的部分的面積（S1 、S2 …）。The first form of the method for evaluating the amount of solids in the filter cloth cleaning drainage based on the intensity of the light signal from the coalescing state monitoring sensor is the following method: as shown in Figure 5, the light signal intensity is integrated over time, and the integrated value becomes larger. Larger, it is judged as the more solid content. In Figure 5, such as time T (mSec) ~ time T + 200 (mSec), time T + 2000 (mSec) ~ time T + 2200 (mSec)... the received light signal intensity during the 200 mSec light-emitting period integral. That is, the area (S 1 , S 2 ...) of the dotted part in FIG. 5 is measured over time.

基於規定時間（例如200秒）期間內的各積分值S1 、積分值S2 …之和或平均值來評價濾布帶清洗排水中的固形物量。 Based on the sum or average value of each integral value S 1 , integral value S 2 ... in a predetermined time (for example, 200 seconds), the amount of solids in the filter cloth belt cleaning drainage is evaluated.

評價濾布帶清洗排水中的固形物量的方法的第二形態為如下方法：如圖6般，求出於各發光期間時刻T（mSec）～時刻T+200（mSec）間、時刻T+2000（mSec）～時刻T+2200（mSec）間、…的最小受光訊號強度Imin（1）、最小受光訊號強度Imin（2）、…。於該方法中，求出規定時間（例如10分鐘。於該10分鐘內發光期間存在300個（10×60÷2=300））內的最小受光訊號強度（以下，有時稱為底值）Imin（1）、最小受光訊號強度Imin（2）…最小受光訊號強度Imin（300）之和或平均值，並將該值作為濾布帶清洗排水中的固形物量的指標值。The second form of the method for evaluating the amount of solids in the filter cloth belt cleaning drainage is the following method: As shown in Figure 6, find the time T+2000 from time T (mSec) to time T+200 (mSec) during each light-emitting period Between (mSec) and time T+2200 (mSec), the minimum light-receiving signal intensity Imin(1), the minimum light-receiving signal intensity Imin(2),... In this method, the minimum light-receiving signal intensity (hereinafter, sometimes referred to as the bottom value) within a predetermined period of time (for example, 10 minutes. There are 300 (10×60÷2=300)) during the 10 minutes of light emission Imin(1), minimum light-receiving signal intensity Imin(2)...the sum or average of the minimum light-receiving signal intensity Imin(300), and use this value as an index value for the amount of solids in the filter cloth cleaning drainage.

於所述第一實施形態、第二實施形態中，以使發光元件間歇地運作的例子進行了說明，但發光元件亦可連續地運作。於此情況下，將發光元件連續地發光的規定時間（例如200秒）劃分為更短的單位（例如200 mSec），計算該單位時間內的受光訊號強度的積分值或底值。繼而，於規定時間內進一步對該單位時間內的受光訊號強度的積分值或底值進行累計或平均（加法移動平均）。然後，將規定時間內獲得的累計值或平均值作為濾布帶清洗排水中的固形物量的指標值。In the first embodiment and the second embodiment, an example in which the light-emitting element is operated intermittently has been described, but the light-emitting element may also be operated continuously. In this case, the predetermined time (for example, 200 seconds) during which the light-emitting element continuously emits light is divided into shorter units (for example, 200 mSec), and the integrated value or the bottom value of the intensity of the received light signal within the unit time is calculated. Then, the integrated value or the bottom value of the received light signal intensity in the unit time is further accumulated or averaged (additive moving average) within a predetermined time. Then, the cumulative value or average value obtained within a predetermined period of time is used as an index value of the amount of solids in the filter cloth belt cleaning drainage.

評價濾布帶清洗排水中的固形物量的方法的第三形態是檢測規定時間內的受光訊號強度的峰值的數量，並累計各峰值的訊號強度的方法。基於該累計值來評價固形物量。The third form of the method of evaluating the amount of solids in the filter cloth belt cleaning drainage is to detect the number of peaks of the light-receiving signal intensity within a predetermined period of time, and to accumulate the signal intensities of the peaks. Based on this cumulative value, the solid content is evaluated.

所述規定時間較佳為自200 mSec～20分鐘，特別是自200 mSec～10分鐘之間選擇。所述200秒及10分鐘只不過是一例。The predetermined time is preferably selected from 200 mSec to 20 minutes, especially from 200 mSec to 10 minutes. The 200 seconds and 10 minutes are just examples.

接著參照圖7（a）、圖7（b）對評價濾布帶清洗排水中的固形物量的方法的第四形態進行說明。Next, the fourth aspect of the method of evaluating the solid content in the filter cloth belt washing drainage will be described with reference to FIGS. 7(a) and 7(b).

圖7（a）是描繪了於時刻t1 、時刻t2 …時刻tz 的各時刻測定的受光訊號強度的圖表。各時刻的間隔Δt（即tk -tk-1 ）如上所述，較佳為0.1 mSec～10 mSec，例如1 mSec。Fig. 7(a) is a graph depicting the received light signal intensity measured at each time of time t 1 , time t 2 ... time t z. The interval Δt (ie, t k- t k-1 ) at each time is as described above, and is preferably 0.1 mSec to 10 mSec, for example, 1 mSec.

圖7（b）是於圖7（a）中，記入極小點P1 、極小點P2 …以及極大點Q1 、極大點Q2 …，且記入極小點與極大點之差（以下，有時稱為峰值差）h1 、h2 …的說明圖。 關於峰值差為規定值以下的微小的極小、極大，由於與干擾的差異不明，因此忽視來處理。例如，於h1 為規定值以下的情況下，若P1 ≧P2 ，則忽視P1 及Q1 進行資料處理。若P1 ＜P2 ，則忽視Q1 及P2 ，以P1 與Q2 之差成為峰值差的方式進行資料處理。Figure 7(b) is in Figure 7(a), record the minimum point P 1 , the minimum point P 2 … and the maximum point Q 1 , the maximum point Q 2 …, and record the difference between the minimum point and the maximum point (below, there are It is called peak difference) h 1 , h 2 … explanatory diagram. Regarding the minute minimum and maximum whose peak difference is less than a predetermined value, the difference from the interference is unknown, so it is ignored and handled. For example, when h 1 is less than a predetermined value, if P 1 ≧P 2 , then P 1 and Q 1 are ignored for data processing. If P 1 <P 2 , then Q 1 and P 2 are ignored, and data processing is performed so that the difference between P 1 and Q 2 becomes a peak difference.

如上所述，任意時刻tk-1 的受光訊號強度與時刻tk 的受光訊號強度之差hk 是與於時刻tk-1 ～時刻tk 間出入測量區域A的粒子的表面積相關的值。Surface area described above, any time t by the optical signal intensity and the time point k-1 t of the difference h k signal intensities of the light of k is in the time t k-1 ~ time t between k and out of the measurement area A particles correlation value .

因此，於時刻t1 ～tz 的Δt·z秒期間（z例如設為200，於Δt=1 mSec的情況下Δt×z為0.2秒）中的所有峰值差h1 、峰值差h2 …峰值差hn 之和，評價濾布清洗排水中的固形物量。Therefore, during the Δt·z second period from time t 1 to t z (z is set to 200, for example, Δt×z is 0.2 seconds in the case of Δt=1 mSec), all peak differences h 1 , peak differences h 2 … The sum of the peak difference h n is used to evaluate the amount of solids in the filter cloth cleaning drainage.

隨著增加無機凝聚劑向原污泥的注入量，濾布清洗排水中的固形物量變少。濾布清洗排水中的固形物量與脫水餅的剝離性相關，脫水餅的剝離性越好，固形物量越少。對藉由所述第一方法～第四方法中的任一方法求出的固形物量指標值設定目標值或目標範圍，於大於目標值（或目標範圍上限值）時，使得增加直至成為目標值（或目標範圍上限值以下）為止的無機凝聚劑的注入量。另外，於小於目標值（或目標範圍下限值）時，使得減少（或維持）直至成為目標值（或目標範圍下限值以上）為止的無機凝聚劑的注入量，藉此能夠以成為恰當的藥液注入條件的方式進行連續的控制。As the amount of inorganic coagulant injected into the original sludge is increased, the amount of solids in the filter cloth cleaning drainage decreases. The amount of solids in the filter cloth washing drainage is related to the releasability of the dehydrated cake. The better the releasability of the dehydrated cake, the smaller the amount of solids. Set the target value or target range for the solid content index value obtained by any of the first to fourth methods, and when it is greater than the target value (or the upper limit of the target range), increase until it becomes the target Value (or below the upper limit of the target range) of the inorganic flocculant injected. In addition, when it is less than the target value (or the lower limit of the target range), the amount of the inorganic flocculant injected until it reaches the target value (or the lower limit of the target range) can be reduced (or maintained) so as to be appropriate The method of chemical injection conditions is continuously controlled.

亦能夠設置兩個以上所檢測的訊號強度（與所述第三形態相關連）或強度差（與所述第四形態相關連），對各自的檢測數值進行加權而進行指標化。即，亦可採用如下方法：設置特定位準以上的訊號強度或強度差，於將至所述位準的倍強度為止的訊號強度或強度差的範圍內的出現數設為A，將倍強度以上的訊號強度或強度差的出現數設為B時，求出藉由下述式計算出的剝離指標C，以C成為特定的值的方式控制無機凝聚劑的注入量、或調整脫水機的濾布進給速度。 C=A+nB（n是基於訊號強度差設定的係數）It is also possible to set two or more detected signal intensities (related to the third mode) or intensity differences (related to the fourth mode), and to weight the respective detection values for indexing. That is, the following method can also be adopted: setting the signal intensity or intensity difference above a certain level, and setting the number of occurrences within the range of the signal intensity or intensity difference up to the double intensity of the level as A, and setting the double intensity When the number of occurrences of the above signal intensity or intensity difference is set to B, obtain the peeling index C calculated by the following formula, and control the injection amount of the inorganic coagulant or adjust the dehydrator so that C becomes a specific value Feeding speed of filter cloth. C=A+nB (n is a coefficient set based on the difference in signal strength)

於發現背漏或側漏等固化前的污泥的混入的情況下，由於伴隨散射光受光訊號的基本電壓（日本專利第6281534號中所述的絮凝物間的濁度）的上升，因此於該值成為一定值以上的情況下，進行藉由向外部輸出警報來催促增加凝聚槽中的高分子凝聚劑、或直接增加高分子凝聚劑的添加量直至該值低於所述一定值為止等的控制。When the mixing of sludge before solidification, such as back leakage or side leakage, is found, the basic voltage (turbidity between flocs described in Japanese Patent No. 6281534) of the scattered light receiving signal increases. When the value becomes a certain value or more, output an alarm to the outside to urge the increase of the polymer flocculant in the flocculation tank, or directly increase the addition amount of the polymer flocculant until the value is lower than the certain value, etc. control.

自濾布的洩漏（背漏）是由於污泥未充分凝聚而污泥（濁質）穿過濾布的現象。於此情況下，所述第二形態（圖6）的底值是以充分大的值的形式被檢測，但由於不存在凝聚物或凝聚物少，因此具有規定值以上的訊號強度（與所述第三形態相關連）或強度差（與所述第四形態相關連）的峰值的出現率變低。因此，藉由該些情況進行解析，可區別地判斷背漏與剝離性的劣化。The leakage of the filter cloth (back leakage) is the phenomenon that the sludge (turbidity) penetrates the filter cloth due to insufficient coagulation of the sludge. In this case, the bottom value of the second mode (FIG. 6) is detected as a sufficiently large value, but since there are no aggregates or there are few aggregates, it has a signal intensity above a predetermined value (and therefore The appearance rate of peaks of the third form (related to the fourth form) or poor intensity (related to the fourth form) becomes lower. Therefore, by analyzing these conditions, it is possible to discriminately judge the deterioration of the back leakage and the peelability.

於側漏狀態下，與於不存在側洩漏或背漏的狀態下發生剝離性劣化的情況相比，於清洗排水中檢測出小粒徑的懸浮物質。因此，可根據預先設定的位準範圍的峰值的出現率來判斷發生了側漏。In the side leakage state, compared to the case where the peelability is deteriorated in the state where there is no side leakage or back leakage, suspended substances with a small particle size are detected in the washing drainage. Therefore, the occurrence of side leakage can be determined based on the occurrence rate of the peak value of the preset level range.

於所述說明中，基於凝聚狀態監測感測器的檢測資料控制凝聚劑添加量，但亦可控制污泥供給量或濾布帶的行進速度，亦可將它們適宜組合來控制。 [實施例]In the above description, the amount of the coagulant added is controlled based on the detection data of the coagulation state monitoring sensor, but the sludge supply amount or the traveling speed of the filter cloth belt can also be controlled, or they can be controlled in appropriate combinations. [Example]

[實施例1] 作為原污泥，使用了自工廠廢水的活性污泥處理步驟排出的剩餘污泥。作為帶式壓榨脫水機，使用了栗田工業股份有限公司製造的海德普萊斯（HYDE press）2250。作為無機凝聚劑使用了聚氯化鋁（Poly Aluminum Chloride，PAC）。作為高分子凝聚劑，使用了栗田工業股份有限公司製造的庫里菲克斯（kurifix）EC-466。 作為濾布帶清洗排水中的固形物狀態的測定裝置，使用了日本專利第6281534號記載的凝聚感測器（栗田工業股份有限公司製造的S.森興（sensing）CP-P）。[Example 1] As the original sludge, excess sludge discharged from the activated sludge treatment step of factory wastewater was used. As the belt press dehydrator, HYDE press 2250 manufactured by Kurita Industrial Co., Ltd. was used. As an inorganic coagulant, Poly Aluminum Chloride (PAC) was used. As the polymer flocculant, Kurifix EC-466 manufactured by Kurita Industry Co., Ltd. was used. As a measuring device for the solids state in the filter cloth belt cleaning drainage, the aggregation sensor described in Japanese Patent No. 6281534 (S. Sensing CP-P manufactured by Kurita Industry Co., Ltd.) was used.

計算出圖5所示的200 mSec間的積分值的於200秒期間之和。Calculate the sum of the integral value between 200 mSec shown in Figure 5 during 200 seconds.

將無機凝聚劑添加量設為1642 mg/L、2462 mg/L或4456 mg/L，將高分子凝聚劑添加量設為244 mg/L，將污泥供給量設為96 Kg/h、將濾布速度設為78 m/h進行脫水處理，並觀察自濾布的脫水餅剝離狀況。將結果示於表1。Set the addition amount of inorganic flocculant to 1642 mg/L, 2462 mg/L or 4456 mg/L, the addition amount of polymer flocculant to 244 mg/L, the sludge supply rate to 96 Kg/h, and the The filter cloth speed was set to 78 m/h for dehydration treatment, and the dewatering cake peeling from the filter cloth was observed. The results are shown in Table 1.

[實施例2] 於實施例1中，求出圖6所示的200 mSec的底值Imin（1）、底值Imin（2）…底值Imin（300），並計算它們的平均值。將結果示於表1。[Example 2] In Example 1, the bottom value Imin(1), bottom value Imin(2)...bottom value Imin(300) of 200 mSec shown in Fig. 6 were calculated, and their average value was calculated. The results are shown in Table 1.

[表1] 無機凝聚劑 注入量（mg/L） 1642 2462 4456 脫水濾泥 剝離狀況 不良 大致良好 極其良好 散射光強度 積分值（V/200s） （實施例1） 46 42 32 散射光強度 平均底值（mV/） （實施例2） 68 63 32 [Table 1] Inorganic coagulant injection volume (mg/L) 1642 2462 4456 Dewatering filter mud stripping condition bad Roughly good Extremely good Integral value of scattered light intensity (V/200s) (Example 1) 46 42 32 Average bottom value of scattered light intensity (mV/) (Example 2) 68 63 32

如表1般，確認到越增加無機凝聚劑的注入量，脫水餅自濾布的剝離性越良好。另外，確認到藉由以散射光強度積分值或平均底值成為基準值以下（例如前者的情況下為42 V/200秒以下，後者的情況下為63 mV以下）的方式添加無機凝聚劑，可良好地維持脫水餅剝離性。As shown in Table 1, it was confirmed that the more the injection amount of the inorganic flocculant was increased, the better the peelability of the dehydrated cake from the filter cloth was. In addition, it was confirmed that the inorganic flocculant was added so that the integrated value of the scattered light intensity or the average bottom value became the reference value or less (for example, 42 V/200 sec or less in the former case, and 63 mV or less in the latter case). The peelability of the dehydrated cake can be maintained well.

使用特定的形態對本發明進行了詳細說明，但所屬技術領域具有通常知識者當知，能夠於不脫離本發明的意圖及範圍的情況下進行各種變更。 本申請案是基於2019年10月11日提出申請的日本專利申請案2019-187889，藉由引用而援引其全文。The present invention has been described in detail using a specific form, but those skilled in the art will know that various changes can be made without departing from the intent and scope of the present invention. This application is based on the Japanese Patent Application 2019-187889 filed on October 11, 2019, the full text of which is incorporated by reference.

1:流入管 2:流量計 3:凝聚槽（第一凝聚槽） 3a、5a:攪拌機 4:藥液注入裝置（第一藥液注入裝置） 5:凝聚槽（第二凝聚槽） 6:藥液注入裝置（第二藥液注入裝置） 8:控制器 9:移送管 10:帶式壓榨脫水機 11:配管 12:測量槽 20:凝聚狀態監測感測器 21:塊 21a、21b:面 21c:頂部 22:發光部 23:受光部 A:測量區域 h1 ～hn :峰值差 L:雷射光 P1 、P2 :極小點 Q1 、Q2 :極大點 S:散射光 S1 、S2 :積分值（面積） t1 ～tz :時刻1: Inflow pipe 2: Flow meter 3: Aggregation tank (first aggregation tank) 3a, 5a: Mixer 4: Chemical injection device (first chemical injection device) 5: Aggregation tank (second aggregation tank) 6: Medicine Liquid injection device (second chemical liquid injection device) 8: Controller 9: Transfer pipe 10: Belt press dehydrator 11: Piping 12: Measuring tank 20: Aggregation state monitoring sensor 21: Block 21a, 21b: Surface 21c : Top 22: Light-emitting part 23: Light-receiving part A: Measurement area h 1 to h n : Peak difference L: Laser light P 1 , P 2 : Minimal point Q 1 , Q 2 : Maximum point S: Scattered light S 1 , S 2 : Integral value (area) t 1 ～t z : time

圖1是實施方式的帶式壓榨脫水系統的結構圖。 圖2是凝聚狀態監測感測器的結構圖。 圖3是凝聚狀態監測感測器的測量區域的示意圖。 圖4是凝聚狀態監測感測器的檢測波形圖。 圖5是凝聚狀態監測感測器的檢測波形圖。 圖6是凝聚狀態監測感測器的檢測波形圖。 圖7（a）及圖7（b）是凝聚狀態監測感測器的檢測波形圖。Fig. 1 is a structural diagram of a belt press dewatering system according to an embodiment. Figure 2 is a structural diagram of a coalescing state monitoring sensor. Fig. 3 is a schematic diagram of the measurement area of the coalescence state monitoring sensor. Figure 4 is a detection waveform diagram of a coalescing state monitoring sensor. Figure 5 is a detection waveform diagram of a coalescing state monitoring sensor. Fig. 6 is a detection waveform diagram of a coalescing state monitoring sensor. Fig. 7(a) and Fig. 7(b) are the detection waveform diagrams of the coalescing state monitoring sensor.

1:流入管 1: Inflow pipe

2:流量計 2: Flowmeter

3:凝聚槽(第一凝聚槽) 3: Cohesion tank (first cohesion tank)

3a、5a:攪拌機 3a, 5a: blender

4:藥液注入裝置(第一藥液注入裝置) 4: Liquid medicine injection device (first liquid medicine injection device)

5:凝聚槽(第二凝聚槽) 5: Cohesion tank (second coacervation tank)

6:藥液注入裝置(第二藥液注入裝置) 6: Liquid medicine injection device (second liquid medicine injection device)

8:控制器 8: Controller

9:移送管 9: Transfer tube

10:帶式壓榨脫水機 10: Belt press dehydrator

11:配管 11: Piping

12:測量槽 12: Measuring tank

20:凝聚狀態監測感測器 20: Condensation state monitoring sensor

Claims (7)

一種帶式壓榨脫水系統的監視裝置，具有與帶式壓榨脫水機的濾布帶清洗排水中的固形物的狀態對應的指標值的測定單元，且所述帶式壓榨脫水系統的監視裝置中， 所述測定單元具有於濾布帶清洗排水中照射雷射光的照射部及接收散射光的受光部，且根據散射光強度訊號的時間變化來求出所述指標值。A monitoring device for a belt squeeze dehydration system has an index value measuring unit corresponding to the state of solids in the filter cloth belt cleaning drainage of a belt squeeze dehydrator, and in the monitoring device of the belt squeeze dehydration system, The measurement unit has an irradiating part that irradiates laser light in the filter cloth cleaning drainage and a light-receiving part that receives scattered light, and obtains the index value based on the time change of the scattered light intensity signal. 如請求項1所述的帶式壓榨脫水系統的監視裝置，其中，基於所述散射光強度訊號的時間積分值來設定所述指標值。The monitoring device of the belt press dehydration system according to claim 1, wherein the index value is set based on a time integrated value of the scattered light intensity signal. 如請求項1所述的帶式壓榨脫水系統的監視裝置，其中，基於所述散射光強度訊號的每規定時間的底值來設定所述指標值。The monitoring device of the belt press dehydration system according to claim 1, wherein the index value is set based on a bottom value of the scattered light intensity signal every predetermined time. 如請求項1所述的帶式壓榨脫水系統的監視裝置，其中，檢測規定時間內的所述散射光強度訊號的峰值的數量，並基於在規定時間內累計各峰值的訊號強度而得的值來設定所述指標值。The monitoring device of the belt press dehydration system according to claim 1, wherein the number of peaks of the scattered light intensity signal within a predetermined time is detected, and the value is based on the value obtained by accumulating the signal intensity of each peak within the predetermined time To set the index value. 如請求項1所述的帶式壓榨脫水系統的監視裝置，其中，求出所述散射光強度訊號的極大值與極小值之差（強度差），並基於規定時間內的強度差的累計值來設定所述指標值。The monitoring device of the belt press dehydration system according to claim 1, wherein the difference (intensity difference) between the maximum value and the minimum value of the scattered light intensity signal is obtained, and the difference is based on a cumulative value of the intensity difference within a predetermined time To set the index value. 一種帶式壓榨脫水系統的監視方法，其中，使用如請求項1至請求項5中任一項所述的帶式壓榨脫水系統的監視裝置，並基於所述指標值來進行帶式壓榨脫水系統的監視。A monitoring method for a belt squeeze dehydration system, wherein the belt squeeze dehydration system monitoring device as described in any one of claim 1 to claim 5 is used, and the belt squeeze dehydration system is performed based on the index value Monitoring. 一種帶式壓榨脫水機的控制裝置，其中，使用如請求項1至請求項5中任一項所述的帶式壓榨脫水系統的監視裝置，並以所述指標值成為規定值或規定範圍內的方式控制向被處理污泥的凝聚劑添加量。A control device for a belt squeezing dehydrator, wherein the monitoring device of the belt squeezing dehydration system as described in any one of claim 1 to claim 5 is used, and the index value becomes a specified value or within a specified range The method controls the amount of coagulant added to the sludge being treated.
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