JPH03245808A - Method and apparatus for follow-up measurement of water content of cake in filter press - Google Patents
Method and apparatus for follow-up measurement of water content of cake in filter pressInfo
- Publication number
- JPH03245808A JPH03245808A JP2043672A JP4367290A JPH03245808A JP H03245808 A JPH03245808 A JP H03245808A JP 2043672 A JP2043672 A JP 2043672A JP 4367290 A JP4367290 A JP 4367290A JP H03245808 A JPH03245808 A JP H03245808A
- Authority
- JP
- Japan
- Prior art keywords
- cake
- filtrate
- filtration chamber
- slurry
- amount
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title abstract description 6
- 238000005259 measurement Methods 0.000 title description 3
- 238000001914 filtration Methods 0.000 claims abstract description 44
- 239000002002 slurry Substances 0.000 claims abstract description 27
- 239000000706 filtrate Substances 0.000 claims abstract description 24
- 239000007788 liquid Substances 0.000 claims abstract description 15
- 238000000926 separation method Methods 0.000 claims abstract description 4
- 230000006835 compression Effects 0.000 claims 1
- 238000007906 compression Methods 0.000 claims 1
- 238000000691 measurement method Methods 0.000 claims 1
- 230000002411 adverse Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 230000018044 dehydration Effects 0.000 description 3
- 238000006297 dehydration reaction Methods 0.000 description 3
- 241000257465 Echinoidea Species 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Landscapes
- Filtration Of Liquid (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、固液分離分離装置としてのフィルタプレス
のその運転中における濾過室のケーキ含水率を即時に計
測する方法並びにその装置を提供せんとするものである
。[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a method and device for instantly measuring the cake moisture content in a filtration chamber during operation of a filter press as a solid-liquid separation device. That is.
従来、フィルタプレスで濾過脱水したケーキの含水率を
知るには、濾過脱水終了後に機外に取出し、そのサンプ
ルを赤外線等の熱源を用いて乾燥することで知っていた
。Conventionally, the moisture content of a cake that has been filtered and dehydrated using a filter press has been determined by taking it out of the machine after filtration and dehydration, and drying the sample using a heat source such as infrared rays.
上述の従来の方法では、サンプルの乾燥に時間（数時間
〜十数時間）を要するとともに、特に、濾過脱水後の計
測であるため、このようなケーキ含水率の情報は、運転
中のフィルタプレスには全く利用できず、しばしば、濾
過脱水に失敗していた。このように、従来においては、
フィルタプレスの運転は、供給するスラリーの初期の性
状、性質に頼った勘と経験で行なわれるため、当然、脱
水ケーキの含水率にもばらつきが大きく、脱水後の処理
工程にも悪影響を及はしていた。In the conventional method described above, it takes time (several hours to more than 10 hours) to dry the sample, and since the measurement is performed after filtration and dehydration, information on the moisture content of the cake cannot be obtained from the filter press during operation. It could not be used at all, and filtration and dehydration often failed. In this way, conventionally,
Since the filter press is operated based on intuition and experience based on the initial properties and properties of the slurry to be supplied, it is natural that the moisture content of the dehydrated cake will vary widely, and this will not adversely affect the treatment process after dewatering. Was.
そこで、この発明はフィルタプレスの運転中に、その濾
過室内のケーキの含水率を即時に計測知得して、運転を
制御し一定の含水率のケーキが得られるようにし、運転
の失敗や後工程への悪影響を防止し得るようにしたもの
である。Therefore, this invention instantly measures and learns the moisture content of the cake in the filtration chamber while the filter press is in operation, and controls the operation so that a cake with a constant moisture content can be obtained. This is to prevent adverse effects on the process.
以下、具体的にこの発明を説明すれば、その要旨とする
ところは、略一定容積の濾過室内に封入したスラリーを
加圧して固液分離を行なう：うにしたフィルタプレスに
おいて、上記濾過運転中の濾過室からの濾液量を計測し
、その計測値からスラリーの圧入量を求めるとともに、
一方、予め判明している封入スラリーの密度、Ｐ液の密
度およびスラリーの重量濃度とから濾過室内のケーキの
乾湿比を計算し、Ｐ液抜高時における濾過室内のケーキ
の含水率を求める↓うにしたものである。The present invention will be explained in detail below.The gist of the invention is to perform solid-liquid separation by pressurizing slurry sealed in a filtration chamber of approximately constant volume. Measure the amount of filtrate from the filtration chamber, calculate the amount of slurry injected from the measured value, and
On the other hand, the dry-wet ratio of the cake in the filtration chamber is calculated from the density of the enclosed slurry, the density of the P liquid, and the weight concentration of the slurry, which are known in advance, and the moisture content of the cake in the filtration chamber at the time of draining the P liquid is determined ↓ It was made by sea urchin.
この手法をさらに具体的に説明すれば、次の通りである
。This method will be explained more specifically as follows.
今、濾過室へのスラリーの圧入量をＵｏ、？濾過室から
の濾液量をＵｆ 、 ｆ濾過室の容積をＶｃとすると、
Ｕｏ二Ｕｆ ＋Ｖｃ ・・・・・・・・・・（１）ま
た、ケーキの重さをＷ、スラリーの密度をρ′。Now, the amount of slurry injected into the filtration chamber is Uo, ? If the amount of filtrate from the filtration chamber is Uf, and the volume of the filtration chamber is Vc, then
Uo2Uf +Vc (1) Also, the weight of the cake is W, and the density of the slurry is ρ'.
Ｐ液の密度をρとすると
Ｗ ＝ Ｕｏ ｐ’ −Ｕｆ ・ｐ −（２１また、ケ
ーキの湿乾重量比をｍとすると但し、Ｓはスラリーの重
量濃度
上記、（１）（２）（３）式まり
（４）式より、スラリーの重量濃度Ｓ、濾過室の容積Ｖ
ｃ、Ｐ液の密度ρ、スラリーの密度ρ′が判っておれば
、？濾過室からの濾液量Ｕｆを計測することで、次式ま
り、その濾過室の湿ケーキ基準のケーキ含水率Ｍを求め
ることができる。If the density of the P liquid is ρ, then W = Uo p' -Uf ・p - (21 Also, if the wet/dry weight ratio of the cake is m, S is the weight concentration of the slurry above, (1), (2), (3) ) Formula (4) From formula (4), the weight concentration S of the slurry, the volume V of the filtration chamber
If c, the density ρ of the P liquid, and the density ρ′ of the slurry are known, what? By measuring the amount of filtrate Uf from the filtration chamber, the cake moisture content M based on the wet cake of the filtration chamber can be determined using the following equation.
Ｍ＝（１−２−）Ｘ１００・・・・・・・・・（５）す
なわち、濾過室の容積Ｖｃは判っており、また、スラリ
ーの重量濃度Ｓ、スラリーの密度ρ、Ｐ液の密度ρは濾
過運転の開始時に殆どの場合判っているので、濾液量Ｕ
ｆを計測することで（４）式および（５）式よりケーキ
含水率Ｍを計算するものである。M = (1-2-) Since ρ is known in most cases at the start of filtration operation, the filtrate volume U
By measuring f, the cake moisture content M is calculated from equations (4) and (5).
この含水率の計算は、マイクロコンピュータ等ヲ用いて
迅速に行ない結果をデジタル表示することも１あるいは
その結果を情報として制御装置に伝達し、運転を停止し
たり、加圧時間を調整したりする等に使用することがで
きるは勿論である。This moisture content calculation can be quickly performed using a microcomputer, etc., and the result can be displayed digitally (1) or the result can be transmitted as information to the control device, which can be used to stop the operation or adjust the pressurization time. Of course, it can also be used for
そして、前述の濾液量Ｕｆを計測するには、例えば次の
ような手段を用いるものである。In order to measure the above-mentioned filtrate amount Uf, for example, the following means is used.
すなわち、第１図に示すように、濾過室１にＰ液の計量
タンク２を設けておき、この計量タンク２を断面積の−
様なものに構成し、その液面レベルＨで濾液量を検出し
、その検出情報を遂次計算機Ｃに送れば最も簡単迅速に
当該濾過室１のその時点におけるケーキの含水率を知る
ことができる。That is, as shown in FIG. 1, a P liquid measuring tank 2 is provided in the filtration chamber 1, and this measuring tank 2 is connected to
If the filtrate amount is detected at the liquid level H and the detected information is sequentially sent to the computer C, it is easiest and quickest to know the moisture content of the cake at that point in the filtration chamber 1. can.
そして、計測終了後のＰ液は、計量タンク２が満杯とな
る前に自動排水弁３を作動させて全量排水する。この排
水作業は、沢過室ｌを開いてケーキを排出したりＰ布を
洗滌したりする濾過脱水をしていないいわゆる雑時間中
に行なうものである。After the measurement is completed, the P liquid is completely drained by operating the automatic drain valve 3 before the measuring tank 2 becomes full. This drainage work is carried out during the so-called casual hours when the filtering chamber 1 is not opened to discharge the cake or wash the P cloth.
尚、以上の説明では、濾過室の容積Ｖｃ 、 ？濾過脱
水せんとするスラリーの重量濃度Ｓ、その密度ρ′。In addition, in the above explanation, the volume of the filtration chamber Vc, ? The weight concentration S of the slurry to be filtered and dehydrated, and its density ρ'.
Ｐ液の密度ρが濾過の開始時に判っているものとしてい
るが、不明な場合、濾過室の容積Ｖｃ 、スラリーの密
度ρ′、Ｐ液の密度ρは簡単に測定できるものであり、
また、スラリーの重量濃度Ｓもスラリータンク３に濃度
計を設けてこれを計算機に連動連結してその計測値を計
算機Ｃに伝えることで、前述の式を用いて重量比ｍを計
算し、ケーキの含水率Ｍを計算することができるもので
ある。またダイヤフラムによる圧搾機構を用いた場合に
は、圧入にＸる濾液量と圧搾による濾液量とを区別して
計測し、これら計量値を基に濾過室内のケーキの乾湿重
量比ｍを求めて含水１！Ｍを求めることができる。It is assumed that the density ρ of the P liquid is known at the start of filtration, but if it is unknown, the volume Vc of the filtration chamber, the density ρ′ of the slurry, and the density ρ of the P liquid can be easily measured.
In addition, the weight concentration S of the slurry can also be determined by installing a concentration meter in the slurry tank 3, interlocking this with the computer, and transmitting the measured value to the computer C, and calculating the weight ratio m using the above-mentioned formula. It is possible to calculate the moisture content M of. In addition, when using a diaphragm-based squeezing mechanism, the amount of filtrate due to press-fitting and the amount of filtrate due to squeezing are measured separately, and based on these measured values, the dry and wet weight ratio m of the cake in the filtration chamber is determined, and the water content is 1 ! M can be found.
ざらに、Ｐ液中に固形物の流出が多い場合には、濾液量
検出と同時にＰ液の濁度を測定し、前述乾湿重量比ｍを
求める式を変形させることで乾湿重量比ｍを求め含水率
Ｍを求めることができる。Roughly speaking, if there is a large amount of solid matter flowing out into the P liquid, measure the turbidity of the P liquid at the same time as detecting the filtrate amount, and calculate the dry and wet weight ratio m by modifying the formula for calculating the dry and wet weight ratio m. The moisture content M can be determined.
以上の説明で明らかなように、この発明は、従来、濾過
終了後に結果としてしか知り得なかったケーキの含水率
を濾過操作中に即時に知ることができるＸうにしたもの
であって、従来、しばしは発生した濾過の失敗を防止で
きるはもとより、操作中における含水率の情報をもとに
して、プラントやプロセスの精密な制御等を可能にした
ものであり、工業的に得られる利益は著大なものである
。As is clear from the above description, the present invention enables the moisture content of the cake to be known immediately during the filtration operation, which was conventionally known only as a result after the filtration was completed. Not only can it prevent filtration failures that often occur, but it also enables precise control of plants and processes based on information on moisture content during operation, and the industrial benefits are significant. It's a big thing.
第１図は、この発明に係る追従計測装置の概略の７０−
シートである。FIG. 1 shows a schematic diagram 70- of the tracking measuring device according to the present invention.
It is a sheet.
Claims (6)
圧して固液分離を行なうようにしたフィルタプレスにお
いて、上記濾過運転中の濾過室からの濾液量を計測して
、その計測値からスラリーの圧入量を求めるとともに、
一方、予め判明している封入スラリーの密度、濾液の密
度およびスラリーの重量濃度とから、濾過室内のケーキ
の乾湿重量比を計算し、濾液抜出時における濾過室内の
ケーキの含水率を求めることを特長とするフィルタプレ
スにおけるケーキ含水率の追従計測方法。(1) In a filter press that performs solid-liquid separation by pressurizing the slurry sealed in the filtration chamber 1 of approximately constant volume, the amount of filtrate from the filtration chamber during the above-mentioned filtration operation is measured, and the measured value is Find the amount of slurry injected from
On the other hand, the dry and wet weight ratio of the cake in the filtration chamber is calculated from the density of the enclosed slurry, the density of the filtrate, and the weight concentration of the slurry, which are known in advance, and the moisture content of the cake in the filtration chamber at the time of drawing out the filtrate is determined. A follow-up measurement method for cake moisture content in a filter press featuring:
リーの乾湿重量比を求めるに当り、そのスラリーの濃度
を濃度計を用いて計測するとともに、その計測した濃度
を用いて濾過室内のケーキの乾湿重量比を計算すること
を特長とするフィルタプレスにおけるケーキ含水率の追
従計測方法。(2) In claim (1), when determining the wet and dry weight ratio of the slurry to be sealed in the filtration chamber 1, the concentration of the slurry is measured using a densitometer, and the measured concentration is used to determine the wet and dry weight ratio of the slurry to be filled in the filtration chamber 1. A method for tracking the moisture content of a cake in a filter press, which is characterized by calculating the wet and dry weight ratio of the cake.
計測するに当り、圧入による濾液と圧搾による濾液量を
計測して、濾過室内の乾湿重量比を求めることを特長と
するフィルタプレスにおけるケーキ含水率の追従計測方
法。(3) In claim (1), the filter is characterized in that, in measuring the amount of filtrate from the filtration chamber 1, the amount of filtrate obtained by press-fitting and the amount of filtrate obtained by compression is determined to determine the dry-wet weight ratio in the filtration chamber. A tracking method for measuring cake moisture content in a press.
計測すると同時にその濁度を計測することを特長とする
フィルタプレスにおけるケーキ含水率の追従計測方法。(4) A method for tracking cake moisture content in a filter press according to claim (1), characterized in that the turbidity of the filtrate is measured at the same time as the amount of filtrate from the filtration chamber 1 is measured.
過室１と、この濾過室から吐出される濾液量を計量する
ことができる計量タンク２と、この計量タンク２で計測
した濾液量と濾過室１に供給されるスラリーの密度およ
び濾液の密度とからその濾過室のケーキの乾湿重量比を
計算することができる計算装置Ｃとからなり、濾過室か
らの濾液量を計測してその計測時における濾過室内のケ
ーキの含水率を知るようにしたことを特長とするフィル
タプレスにおけるケーキ含水率の追従計測装置。(5) A sealed filtration chamber 1 to which a slurry of approximately constant properties is supplied, a measuring tank 2 capable of measuring the amount of filtrate discharged from this filtration chamber, and the amount of filtrate measured in this measuring tank 2. It consists of a calculation device C that can calculate the wet and dry weight ratio of the cake in the filtration chamber from the density of the slurry and the density of the filtrate supplied to the filtration chamber 1, and measures the amount of filtrate from the filtration chamber. A measuring device for tracking the moisture content of a cake in a filter press, characterized in that the moisture content of the cake in a filtration chamber can be determined at any time.
濁度計が付設されているフィルタプレスにおけるケーキ
の含水率の追従計測装置。(6) The device for tracking the moisture content of the cake in a filter press according to claim (5), wherein the filtrate amount measuring tank 2 is provided with a turbidity meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2043672A JPH07114891B2 (en) | 1990-02-23 | 1990-02-23 | Device for measuring cake water content in filter press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2043672A JPH07114891B2 (en) | 1990-02-23 | 1990-02-23 | Device for measuring cake water content in filter press |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03245808A true JPH03245808A (en) | 1991-11-01 |
| JPH07114891B2 JPH07114891B2 (en) | 1995-12-13 |
Family
ID=12670334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2043672A Expired - Fee Related JPH07114891B2 (en) | 1990-02-23 | 1990-02-23 | Device for measuring cake water content in filter press |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07114891B2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5328853A (en) * | 1976-08-30 | 1978-03-17 | Kubota Ltd | Method of automatically controlling filter press |
-
1990
- 1990-02-23 JP JP2043672A patent/JPH07114891B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5328853A (en) * | 1976-08-30 | 1978-03-17 | Kubota Ltd | Method of automatically controlling filter press |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07114891B2 (en) | 1995-12-13 |
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