JP3063874B2 - Dewatering cake supply device for sewage sludge incineration equipment and its operation method - Google Patents
Dewatering cake supply device for sewage sludge incineration equipment and its operation methodInfo
- Publication number
- JP3063874B2 JP3063874B2 JP1276493A JP1276493A JP3063874B2 JP 3063874 B2 JP3063874 B2 JP 3063874B2 JP 1276493 A JP1276493 A JP 1276493A JP 1276493 A JP1276493 A JP 1276493A JP 3063874 B2 JP3063874 B2 JP 3063874B2
- Authority
- JP
- Japan
- Prior art keywords
- cake
- dewatering
- incinerator
- feed pipe
- dewatered
- 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.)
- Expired - Lifetime
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/40—Valorisation of by-products of wastewater, sewage or sludge processing
Landscapes
- Incineration Of Waste (AREA)
- Gasification And Melting Of Waste (AREA)
- Treatment Of Sludge (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、下水汚泥焼却設備にお
いて、汚泥貯留槽から焼却炉に所定の供給量の脱水ケー
キを送る脱水ケーキ供給装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dewatering cake feeder for feeding a predetermined amount of dewatered cake from a sludge storage tank to an incinerator in a sewage sludge incineration plant.
【０００２】[0002]
【従来の技術】一般に、下水汚泥焼却設備では、焼却炉
で、脱水ケーキ（脱水汚泥）を公害を発生させることな
く燃焼させるために、脱水ケーキを焼却炉に定量供給す
ることが要求されている。2. Description of the Related Art Generally, in a sewage sludge incineration facility, in order to burn dewatered cake (dewatered sludge) without causing pollution in an incinerator, it is required to supply a constant amount of the dewatered cake to the incinerator. .
【０００３】即ち、焼却炉においては、脱水ケーキの燃
焼は一定空気供給下でなされるから、脱水ケーキの供給
量が所要値より少なければ、焼却排ガス中の酸素濃度が
高くなり、ＮＯX の発生を助長させることになる。反
面、脱水ケーキの供給量が所要値より多ければ、焼却排
ガス中の酸素濃度が低くなり、脱水ケーキの燃焼過程に
発生するＮＨ4 及びＣＨ4 の混在でＨＣＮの発生を助長
する結果を招き、公害防止対策上好ましくない。また、
燃焼工学上からも、焼却排ガス中から排出される公害物
質を最小限に抑えることが要求される。[0003] That is, in the incinerator, since the combustion of dehydrated cake made under constant air supply, the less than the required value is the supply amount of dehydrated cake, the higher the oxygen concentration in the incineration exhaust gas of the NO X generation Will be encouraged. On the other hand, if the amount exceeds the required value the supply amount of dehydrated cake, the oxygen concentration in the incineration exhaust gas is lowered, leading to the result that increases generation of HCN in mixed NH 4 and CH 4 generated in the combustion process of dehydrated cake, It is not preferable for pollution prevention measures. Also,
From the viewpoint of combustion engineering, it is required to minimize pollutants emitted from incineration exhaust gas.
【０００４】かかる要求に沿って、例えば、図６，図７
に示すように、下水汚泥焼却設備の脱水ケーキ供給装置
が知られている。図６は、従来における第１の下水汚泥
焼却設備の脱水ケーキ供給装置を示し、図において、汚
泥貯留槽１０１の下方に脱水ケーキポンプ１０２が設置
され、この脱水ケーキポンプ１０２から焼却炉１０３へ
圧送配管１０４が配置され、圧送配管１０４の排出端部
には、ケーキ押込機１０５が設置れている。また、汚泥
貯留槽１０１の上流側には、ケーキ移送コンベヤ１０６
が配置され、このケーキ移送コンベヤ１０６には、機械
的計重機１０６Ａが装着されている。In accordance with such a demand, for example, FIGS.
As shown in (1), there is known a dewatered cake supply device for sewage sludge incineration equipment. FIG. 6 shows a conventional dewatering cake supply device of the first sewage sludge incineration equipment. In the figure, a dewatering cake pump 102 is installed below a sludge storage tank 101, and is pumped from the dewatering cake pump 102 to an incinerator 103. A piping 104 is provided, and a cake pushing machine 105 is installed at a discharge end of the pressure feeding piping 104. Further, on the upstream side of the sludge storage tank 101, a cake transfer conveyor 106 is provided.
The cake transfer conveyor 106 is provided with a mechanical weigher 106A.
【０００５】図７は、従来における第２の下水汚泥焼却
設備の脱水ケーキ供給装置を示し、図において、汚泥貯
留槽２０１の下流側にベルトコンベヤ２０２が設置さ
れ、このベルトコンベヤ２０２には、機械的計重機２０
２Ａが装着されている。前記ベルトコンベヤ２０２の下
流側下方にケーキ押込機２０３が設置され、このケーキ
押込機２０３は焼却炉２０４に連結されている。また、
汚泥貯留槽２０１の上流側には、ケーキ移送コンベヤ２
０５が配置されている。FIG. 7 shows a dewatered cake supply device of a second conventional sewage sludge incineration facility. In the figure, a belt conveyor 202 is installed downstream of a sludge storage tank 201, and the belt conveyor 202 is provided with a mechanical device. Weighing machine 20
2A is attached. A cake pusher 203 is installed downstream and below the belt conveyor 202, and the cake pusher 203 is connected to an incinerator 204. Also,
On the upstream side of the sludge storage tank 201, a cake transfer conveyor 2 is provided.
05 is arranged.
【０００６】なお、炉ケーキ投入工程は以下のように、
開始される。集塵機保温工程→焼却炉運転準備工程→バ
ーナ燃焼工程→オイルガン燃焼工程→炉ケーキ投入工程
の順序で進む。[0006] The furnace cake charging step is as follows:
Be started. The process proceeds in the order of the dust collector warming process, the incinerator operation preparation process, the burner burning process, the oil gun burning process, and the furnace cake charging process.
【０００７】ここで、集塵機は、乾式電気集塵機で、燃
焼ガス中の煤塵を除去するため、焼却炉の出口と煙突の
間に設置されている。焼却炉運転準備工程とは、焼却設
備に附帯する補機を順次起動させ、焼却設備系内のガス
がバランスするまでの工程である。Here, the dust collector is a dry type electric dust collector, and is installed between an outlet of an incinerator and a chimney in order to remove dust in combustion gas. The incinerator operation preparation process is a process in which the auxiliary equipment attached to the incineration equipment is sequentially activated until the gas in the incineration equipment system is balanced.
【０００８】バーナ燃焼工程とは、補助バーナを燃焼さ
せ、流動媒体を昇温する工程である。オイルガン燃焼工
程とは、炉内流動層にオイルをガンで直接噴霧させ、流
動媒体を焼却温度まで加温させる工程である。The burner burning step is a step of burning the auxiliary burner and raising the temperature of the fluid medium. The oil gun combustion step is a step in which oil is directly sprayed on the fluidized bed in the furnace with a gun, and the fluidized medium is heated to the incineration temperature.
【０００９】炉ケーキ投入工程とは、焼却炉１０３に脱
水ケーキを投入する工程である。そして、図６の第１の
従来例では、機械的計重機１０６Ａを装着したケーキ移
送コンベヤ１０６と汚泥貯留槽１０１の下方に設けたロ
ードセル式重量計１０７を組み合わせて、汚泥貯留槽１
０１への脱水ケーキ投入量と、汚泥貯留槽１０１の切り
出し残量をベースに単位時間に焼却炉１０３内へ供給さ
れる脱水ケーキ量が算出される。[0009] The furnace cake charging step is a step of charging the dewatered cake into the incinerator 103. In the first conventional example shown in FIG. 6, a cake transfer conveyor 106 equipped with a mechanical weigher 106A and a load cell type weighing scale 107 provided below the sludge storage tank 101 are combined to form a sludge storage tank 1
The amount of dewatered cake supplied into the incinerator 103 per unit time is calculated based on the amount of dewatered cake supplied to the incinerator 01 and the remaining amount of the sludge storage tank 101 cut out.
【００１０】また、図７の第２の従来例では、汚泥貯留
槽２０１から切り出された脱水ケーキは機械的計重機２
０２Ａを装着したベルトコンベヤ２０２上で計測され
る。しかしながら、第１の従来例では、脱水ケーキ量を
瞬時に直接且つ正確に把握できないので、きめの細かい
焼却運転が困難とされている。In the second conventional example shown in FIG. 7, a dewatered cake cut out from a sludge storage tank 201 is supplied to a mechanical weighing machine 2.
It is measured on the belt conveyor 202 equipped with the 02A. However, in the first conventional example, the amount of dewatered cake cannot be directly and accurately grasped instantaneously, so that a fine-grained incineration operation is difficult.
【００１１】また、第２の従来例では、焼却炉２０４へ
の供給量が脱水ケーキの性状により、非常に左右され、
安定した定量供給の継続が困難とされている。例えば、
脱水ケーキが粘性を帯びている場合、汚泥貯留槽２０１
の切出機から切り出されたケーキは、直径が１５０ｍｍ
以上の塊状に形成されることもあり、しかも、機械的計
重機２０２Ａを装着したベルトコンベヤ２０２上に連続
して排出されないため、機械的計重機２０２Ａでは、単
位時間内に計測された量の平均値を、真の計量値とし
て、供給量が制御されている。そのため、焼却炉２０４
側では、供給量に非常なバラツキが発生し、定量供給は
困難となっている。In the second conventional example, the amount supplied to the incinerator 204 is greatly influenced by the properties of the dewatered cake.
It is difficult to maintain stable quantitative supply. For example,
When the dewatered cake is viscous, the sludge storage tank 201
The cake cut out from the cutting machine has a diameter of 150 mm
In some cases, it is formed in a lump as described above, and is not continuously discharged onto the belt conveyor 202 equipped with the mechanical weighing machine 202A. The supply amount is controlled using the value as a true measurement value. Therefore, the incinerator 204
On the side, there is a great variation in the supply amount, making it difficult to supply a fixed amount.
【００１２】汚泥貯留槽２０１から切り出されたケーキ
の形状は、上記のように、塊状に形成され、また、不連
続で排出され、しかも、定量性が無いので、機械的計重
機２０２Ａによる計測では、脱水ケーキの供給むらがあ
り、機械的計重機２０２Ａ自身も、計量時、機械的計重
機２０２Ａの最大目盛以上の脱水ケーキが計量されて
も、余剰分は加算されないようになっており、焼却炉２
０４への供給精度が不充分である。As described above, the shape of the cake cut out of the sludge storage tank 201 is formed in a lump as described above, is discharged discontinuously, and has no quantitative property. There is uneven supply of the dewatered cake, and even if the mechanical weighing machine 202A itself weighs the dewatered cake of the maximum scale of the mechanical weighing machine 202A at the time of measurement, the surplus is not added, and Furnace 2
The supply accuracy to 04 is insufficient.
【００１３】[0013]
【発明が解決しようとする課題】また、最近では、より
精度良く測定するために、電磁式流量計を用いる例もあ
る。電磁式流量計には、例えば、矩形周波励磁方式のも
のが一般的である。Recently, there has been an example in which an electromagnetic flowmeter is used for more accurate measurement. As the electromagnetic flow meter, for example, a rectangular frequency excitation type is generally used.
【００１４】通常の電磁式流量計は、その電極をライニ
ング面より突出したり、フラットにして構成されてい
る。計測流体が液体を対象とした電磁式流量計で脱水ケ
ーキを計測する場合、ケーキ成分中の無機質，繊維質等
が電極に接触する時に発生するノイズ，或いは，巻き込
み気泡を含んだ脱水ケーキが通過する時に流量信号が突
変するため、正確な計測をすることは困難とされてい
る。従って、圧送配管中の脱水ケーキの流量の計測は、
汚泥ノイズが多く、実用化が困難となっている。このよ
うな汚泥ノイズを低減するために、電極をライニング面
より凹ます必要がある。An ordinary electromagnetic flow meter is configured such that its electrodes protrude from the lining surface or are flat. When the dehydration cake is measured with an electromagnetic flow meter that targets liquid as the measurement fluid, the noise generated when inorganics, fibers, etc. in the cake components come into contact with the electrodes, or the dehydration cake containing entrained bubbles passes through It is difficult to perform accurate measurement because the flow signal changes suddenly when performing the measurement. Therefore, the measurement of the flow rate of the dewatered cake in the pressure feed pipe is
There is much sludge noise, which makes it difficult to put into practical use. In order to reduce such sludge noise, the electrodes need to be recessed from the lining surface.
【００１５】そこで、図８に示すように、脱水ケーキの
供給精度を上げるため、汚泥貯留槽３０１の直下に、小
ホッパー付きの脱水ケーキポンプ３０２を設置し、この
脱水ケーキポンプ３０２から焼却炉３０３へ圧送配管３
０４が配置され、圧送配管３０４の焼却炉３０３の直前
には、ケーキ押込機３０５が設置されている。圧送配管
３０４の途中に電磁式流量計３０６が取り付けられ、流
量を計測した例もある。この場合、電磁式流量計で計測
された流量を補正するために、汚泥貯留槽３０１の上流
側には、ケーキ移送コンベヤ３０７が配置され、汚泥貯
留槽３０１の架台上には、ロードセル式重量計３０８が
装着されている。Therefore, as shown in FIG. 8, a dewatering cake pump 302 with a small hopper is installed immediately below the sludge storage tank 301 in order to increase the supply accuracy of the dewatering cake. Pressure piping 3
A cake pusher 305 is provided immediately before the incinerator 303 in the pressure feed pipe 304. In some cases, an electromagnetic flow meter 306 is attached in the middle of the pressure feed pipe 304 to measure the flow rate. In this case, in order to correct the flow rate measured by the electromagnetic flow meter, a cake transfer conveyor 307 is disposed on the upstream side of the sludge storage tank 301, and a load cell type weighing scale is placed on a mount of the sludge storage tank 301. 308 is attached.
【００１６】従来の電磁式流量計では、以下の如き問題
があり、好ましくない。 （１）図８に示すように、電磁式流量計３０６の電磁式
発信機に取り付けてある電極３０６Ａが、図９に示す発
信機ライニング面３０７Ａより引き込ませた、いわゆる
凹型取付であるため、その凹部３０９に絶縁性物質が滞
留することがある。このような場合は原理的に測定不可
能になってしまう。The conventional electromagnetic flow meter has the following problems and is not preferred. (1) As shown in FIG. 8, the electrode 306A attached to the electromagnetic transmitter of the electromagnetic flow meter 306 is a so-called concave attachment which is drawn from the transmitter lining surface 307A shown in FIG. The insulating material may stay in the recess 309. In such a case, measurement becomes impossible in principle.
【００１７】また、このような状態が発生した時の除去
対策がないため、その除去方法は圧送配管３０４中の電
磁式発信機を取り外し、電極３０６Ａを抜き取り、清掃
するという特殊技能者でなければできない作業が必要と
なる。[0017] Further, since there is no countermeasure for removal when such a condition occurs, the removal method is a special technician who removes the electromagnetic transmitter in the pressure feeding pipe 304, removes the electrode 306A, and cleans it. It requires work that cannot be performed.
【００１８】（２）脱水ケーキは圧縮性の流体であるか
ら、圧力を加えるとその容積は小さくなる。電磁式流量
計で計測される容積は加圧下の容積であるから、計測さ
れた容積を重量換算するのに当然、加圧下での比重が必
要となる。(2) Since the dewatered cake is a compressible fluid, its volume is reduced when pressure is applied. Since the volume measured by the electromagnetic flow meter is a volume under pressure, a specific gravity under pressure is naturally required to convert the measured volume into weight.
【００１９】この加圧下での脱水ケーキの比重は、別の
計重装置により測定された脱水ケーキの重量を、電磁式
流量計で計測された加圧下の容積で割ることにより得ら
れるが、脱水ケーキは汚泥貯留槽で測定しており、ま
た、中間の脱水ケーキポンプに付いている小さいホッパ
ー内のケーキレベルが一定でないため、比重の精度が不
充分で、脱水ケーキの供給量の精度が低くなっており、
比重を計測するために上述のように別の計重装置が必要
となる問題がある。The specific gravity of the dewatered cake under pressure is obtained by dividing the weight of the dewatered cake measured by another weighing device by the volume under pressure measured by an electromagnetic flow meter. The cake is measured in the sludge storage tank, and because the cake level in the small hopper attached to the middle dewatering cake pump is not constant, the accuracy of the specific gravity is insufficient, and the accuracy of the dewatering cake supply is low. Has become
There is a problem that another weighing device is required to measure the specific gravity as described above.
【００２０】圧送配管中に脱水ケーキを滞留させたまま
にしておくと（焼却設備の運転を停止したままの状
態）、夏場は特に圧送配管の脱水ケーキが消化発酵を起
こし、圧送配管内に消化ガスが共存する。このような状
態下で、流量計測すると、所要流量とかけ離れた流量信
号を発信することになる等の問題もある。If the dewatered cake is kept standing in the pumping pipe (while the operation of the incinerator is stopped), especially in summer, the dewatered cake in the pumping pipe undergoes digestion and fermentation, and digestion occurs in the pumping pipe. Gas coexists. In such a state, when the flow rate is measured, there is a problem that a flow rate signal far from the required flow rate is transmitted.
【００２１】また、脱水ケーキポンプの所要出力を小さ
くするために、圧送配管中を流れる脱水ケーキの流速
は、特に遅くする必要があり、一般的には３ｃｍ／ｓｅ
ｃ以下とされているが、このような速度範囲では、汚泥
ノイズ（汚泥が電極に接しながら移動する時に発生する
ノイズ）により、発生する起電力が流量信号起電力を上
回り、真の流量信号とならず、種々の技術を駆使しても
汚泥ノイズに起因する起電力を分離することは困難であ
る。Further, in order to reduce the required output of the dewatering cake pump, the flow rate of the dewatering cake flowing through the pressure feed pipe needs to be particularly slowed down, generally 3 cm / sec.
However, in such a speed range, the generated electromotive force exceeds the flow signal electromotive force due to sludge noise (noise generated when the sludge moves while contacting the electrodes), and the true flow signal and In addition, it is difficult to separate the electromotive force caused by the sludge noise even if various techniques are used.
【００２２】本発明は、上述の問題点を解決するために
なされたもので、その目的は、電磁式流量計による計測
時の汚泥ノイズを少なくして、圧送配管中の脱水ケーキ
の流量を正確に計測し、焼却炉に脱水ケーキの所定量を
供給できる下水汚泥焼却設備の脱水ケーキ供給装置を提
供することである。The present invention has been made in order to solve the above-mentioned problems, and an object of the present invention is to reduce the sludge noise at the time of measurement by an electromagnetic flow meter and to accurately control the flow rate of a dewatered cake in a pressure feeding pipe. It is an object of the present invention to provide a dewatered cake supply device of a sewage sludge incineration facility that can supply a predetermined amount of dewatered cake to an incinerator.
【００２３】[0023]
【課題を解決するための手段】請求項１記載の発明は、
汚泥貯留槽から焼却炉へ脱水ケーキを送る下水汚泥焼却
設備の脱水ケーキ供給装置において、汚泥貯留槽の下方
に脱水ケーキポンプを設置し、この脱水ケーキポンプと
焼却炉を圧送配管を介して接続し、圧送配管の途中に、
その内壁面に形成された孔部に電極を、該電極の先端が
内壁面に対して常時引っ込んだ状態で内壁面から突出自
在になるように移動自在に設けてなる電磁式流量計を装
着し、前記電磁式流量計からの信号により、脱水ケーキ
ポンプに所定の供給量を出力させる制御装置を配置した
ことを特徴とする。According to the first aspect of the present invention,
In the dewatering cake supply device of the sewage sludge incineration equipment that sends dewatered cake from the sludge storage tank to the incinerator, a dewatering cake pump is installed below the sludge storage tank, and the dewatering cake pump and the incinerator are connected via a pressure pipe. , In the middle of the pressure feed pipe,
An electromagnetic flowmeter provided with an electrode in a hole formed in the inner wall surface and movably provided so that the tip of the electrode is constantly retracted with respect to the inner wall surface so that the electrode can freely protrude from the inner wall surface. And a controller for outputting a predetermined supply amount to the dewatering cake pump based on a signal from the electromagnetic flow meter.
【００２４】請求項２記載の発明は、汚泥貯留槽から焼
却炉へ脱水ケーキを送る下水汚泥焼却設備の脱水ケーキ
供給装置において、汚泥貯留槽の下方に脱水ケーキポン
プを設置し、この脱水ケーキポンプと焼却炉を圧送配管
を介して接続し、圧送配管の途中に、その内壁面に形成
された孔部に電極を、該電極の先端が内壁面に対して常
時引っ込んだ状態で内壁面から突出自在になるように移
動自在に設けてなる電磁式流量計を装着し、前記電磁式
流量計からの信号により、脱水ケーキポンプに所定の供
給量を出力させる制御装置を配置し、圧送配管の途中に
切換弁を装着し、圧送配管の切換弁の上流側部分と汚泥
貯留槽をケーキ返流管で接続したことを特徴とする。According to a second aspect of the present invention, there is provided a dewatering cake supply device of a sewage sludge incinerator for feeding dewatered cake from a sludge storage tank to an incinerator, wherein a dewatering cake pump is installed below the sludge storage tank. And the incinerator are connected via a pressure pipe, and an electrode is inserted into the hole formed in the inner wall of the pressure pipe in the middle of the pressure pipe, and the electrode protrudes from the inner wall while the tip of the electrode is constantly retracted with respect to the inner wall. An electromagnetic flow meter movably provided so as to be freely mounted is mounted, and a control device for outputting a predetermined supply amount to the dewatering cake pump by a signal from the electromagnetic flow meter is arranged, and in the middle of the pressure feeding pipe And a sludge storage tank connected to the upstream side of the switching valve of the pressure feed pipe by a cake return pipe.
【００２５】請求項３記載の発明は、請求項２記載の下
水汚泥焼却設備の脱水ケーキ供給装置の運転方法であっ
て、計測供給自動運転開始前に圧送配管内の発酵したガ
スを含有した脱水ケーキを汚泥貯留槽に返流した後、圧
送配管内を、発酵したガスを含有した脱水ケーキから未
発酵の脱水ケーキに置換することを特徴とする。According to a third aspect of the present invention, there is provided a method for operating a dewatering cake supply device of a sewage sludge incineration plant according to the second aspect, wherein the dehydration containing fermented gas in the pressure feed pipe before the automatic operation of the measurement and supply is started. After the cake is returned to the sludge storage tank, the inside of the pressure feed pipe is replaced with a dehydrated cake containing fermented gas and an unfermented dehydrated cake.
【００２６】請求項４記載の発明は、請求項１または２
記載の下水汚泥焼却設備の脱水ケーキ供給装置におい
て、焼却炉に、その周りに沿って複数のケーキ投入ノズ
ルを設け、複数のケーキ投入ノズルを圧送配管に接続し
たことを特徴とする。The invention according to claim 4 is the invention according to claim 1 or 2
In the dewatered cake supply device for sewage sludge incineration equipment described above, a plurality of cake injection nozzles are provided around the incinerator, and the plurality of cake injection nozzles are connected to a pressure feed pipe.
【００２７】請求項５記載の発明は、請求項４記載の下
水汚泥焼却設備の脱水ケーキ供給装置において、ケーキ
投入ノズルには、ケーキ分割カッターが取り付けられて
いることを特徴とする。According to a fifth aspect of the present invention, in the dewatered cake supply device of the sewage sludge incineration plant according to the fourth aspect, a cake dividing cutter is attached to the cake input nozzle.
【００２８】請求項６記載の発明は、請求項１または２
記載の下水汚泥焼却設備の脱水ケーキ供給装置の運転方
法であって、脱水ケーキと、し渣及び沈砂を混練した
後、これらを焼却炉に投入することを特徴とする。The invention according to claim 6 is the invention according to claim 1 or 2
A method for operating a dewatered cake supply device for a sewage sludge incineration plant as described above, wherein the dewatered cake, the residue and the sediment are kneaded, and then these are charged into an incinerator.
【００２９】[0029]
【作用】請求項１記載の発明においては、汚泥貯留槽か
らケーキが脱水ケーキポンプに送られ、脱水ケーキポン
プにより送り出された脱水ケーキが圧送配管を通って焼
却炉に圧送される。According to the first aspect of the present invention, the cake is sent from the sludge storage tank to the dewatering cake pump, and the dewatered cake sent out by the dewatering cake pump is fed to the incinerator through the pressure feed pipe.
【００３０】その際、圧送配管を通る脱水ケーキは、電
磁式流量計により、その流量が計測され、その信号が制
御装置に送られる。制御装置では、脱水ケーキの流量か
ら脱水ケーキポンプからの脱水ケーキの供給量が算定さ
れ、脱水ケーキポンプから所定の量の脱水ケーキが、圧
送配管を通って焼却炉に圧送される。At this time, the flow rate of the dewatered cake passing through the pressure feeding pipe is measured by an electromagnetic flow meter, and the signal is sent to the control device. In the control device, the supply amount of the dewatered cake from the dewatered cake pump is calculated from the flow rate of the dewatered cake, and a predetermined amount of the dewatered cake is pumped from the dewatered cake pump to the incinerator through the pressure feed pipe.
【００３１】そして、圧送配管の途中に、その内壁面に
形成された孔部に電極を、該電極の先端が内壁面に対し
て常時引っ込んだ状態で内壁面から突出自在になるよう
に移動自在に設けてなる電磁式流量計を装着しているの
で、圧送配管の孔部と電極の先端とで形成される凹部に
絶縁性物質または気泡が滞留しようとしても、電磁式流
量計の電極の先端を圧送配管の孔部において圧送配管の
内壁面から突出させることにより、前記凹部から絶縁性
物質または気泡が排除される。In the middle of the pressure feed pipe, an electrode is movable in a hole formed in the inner wall surface so that the electrode can be protruded from the inner wall surface while the tip of the electrode is always retracted with respect to the inner wall surface. Since the electromagnetic flow meter provided in the electromagnetic flow meter is installed, even if an insulating substance or air bubbles try to stay in the recess formed by the hole of the pressure feed pipe and the tip of the electrode, the tip of the electrode of the electromagnetic flow meter Is projected from the inner wall surface of the pressure-feeding pipe at the hole of the pressure-feeding pipe, whereby an insulating substance or air bubbles are removed from the concave portion.
【００３２】請求項２記載の発明においては、請求項１
記載の発明に加えて、次の作用が生じる。圧送配管内に
ガスが共存した場合には、切換弁を閉状態にする。この
状態で、脱水ケーキポンプを運転すると、圧送配管内の
脱水ケーキにガスが共存しても、ガスはケーキ返流管を
介して汚泥貯留槽に逃がされる。According to the second aspect of the present invention, the first aspect is provided.
In addition to the described invention, the following operation is performed. When gas coexists in the pressure feed pipe, the switching valve is closed. When the dewatering cake pump is operated in this state, even if gas coexists in the dewatered cake in the pressure feed pipe, the gas is released to the sludge storage tank via the cake return pipe.
【００３３】圧送配管内からガスが排除されると、切換
弁を開状態にする。この状態で、脱水ケーキポンプを運
転すると、ガスが排除された脱水ケーキが電磁式流量計
を通過し、電磁式流量計は正常な流量信号を発信でき
る。When the gas is removed from the pressure supply pipe, the switching valve is opened. When the dewatering cake pump is operated in this state, the dewatered cake from which gas has been removed passes through the electromagnetic flow meter, and the electromagnetic flow meter can transmit a normal flow signal.
【００３４】請求項３記載の発明においては、請求項２
記載の下水汚泥焼却設備の脱水ケーキ供給装置を運転す
る際、計測供給自動運転開始前に圧送配管内の発酵した
ガスを含有した脱水ケーキを汚泥貯留槽に返流した後、
圧送配管内を、発酵したガスを含有した脱水ケーキから
未発酵の脱水ケーキに置換する。According to the third aspect of the present invention, the second aspect is provided.
When operating the dewatering cake supply device of the described sewage sludge incineration equipment, after returning the dewatered cake containing fermented gas in the pressure feed pipe to the sludge storage tank before the automatic operation of measurement and supply,
The inside of the pressure-feeding pipe is replaced with an unfermented dehydrated cake from a dehydrated cake containing a fermented gas.
【００３５】請求項４記載の発明においては、請求項１
または２記載の下水汚泥焼却設備の脱水ケーキ供給装置
において、焼却炉に、その周りに沿って複数のケーキ投
入ノズルを設け、複数のケーキ投入ノズルを圧送配管に
接続したので、焼却炉内に脱水ケーキの多分散供給が可
能になる。According to the fourth aspect of the present invention, there is provided the first aspect.
Or in the dewatering cake supply device of the sewage sludge incineration equipment described in 2, the incinerator is provided with a plurality of cake injection nozzles around the periphery thereof, and the plurality of cake injection nozzles is connected to the pressure feed pipe. Polydisperse supply of cake becomes possible.
【００３６】請求項５記載の発明は、請求項４記載の下
水汚泥焼却設備の脱水ケーキ供給装置において、ケーキ
投入ノズルには、ケーキ分割カッターが取り付けられて
いるので、焼却炉に投入される脱水ケーキの塊が燃焼工
学的に適する大きさに分割される。According to a fifth aspect of the present invention, in the dewatering cake supply device of the sewage sludge incineration equipment according to the fourth aspect, the cake input nozzle is provided with a cake splitting cutter, so that the dewatering device is supplied to the incinerator. The cake mass is divided into suitable sizes for combustion engineering.
【００３７】請求項６記載の発明においては、請求項１
または２記載の下水汚泥焼却設備の脱水ケーキ供給装置
の運転する際、脱水ケーキと、し渣及び沈砂を混練した
後、これらを焼却炉に投入する。In the sixth aspect of the present invention, the first aspect
Alternatively, when the dewatered cake supply device of the sewage sludge incineration equipment described in 2 is operated, the dewatered cake, the residue and the sediment are kneaded, and then these are put into an incinerator.
【００３８】[0038]
【実施例】以下、図面により本発明の実施例について説
明する。図１ないし図５により本発明の実施例に係わる
下水汚泥焼却設備の脱水ケーキ供給装置を説明する。Embodiments of the present invention will be described below with reference to the drawings. 1 to 5, a dewatered cake supply device of a sewage sludge incineration plant according to an embodiment of the present invention will be described.
【００３９】図１において、符号１は汚泥貯留槽で、こ
の汚泥貯留槽１の下方には、脱水ケーキポンプ２が設置
されている。符号３は焼却炉を示し、焼却炉３と脱水ケ
ーキポンプ２は圧送配管４で連結されている。In FIG. 1, reference numeral 1 denotes a sludge storage tank, and a dewatering cake pump 2 is provided below the sludge storage tank 1. Reference numeral 3 denotes an incinerator, and the incinerator 3 and the dewatering cake pump 2 are connected by a pressure feed pipe 4.
【００４０】圧送配管４の途中には、電磁式流量計５
と、第１空気式切換弁（切換弁）６と、ケーキ投入弁７
とが、上流側から順番に装着されている。圧送配管４の
電磁式流量計５と第１空気式切換弁６の間の部分と、汚
泥貯留槽１は、ケーキ返流管１１で接続され、ケーキ返
流管１１の途中には、第２空気式切換弁８が装着されて
いる。第１空気式切換弁６，第２空気式切換弁８の駆動
は例えばモータ駆動でも良い。電磁式流量計５は、電磁
式発信器５Ｃと、変換器９とで構成されている。In the middle of the pressure feed pipe 4, an electromagnetic flow meter 5
, A first pneumatic switching valve (switching valve) 6, and a cake input valve 7
Are mounted in order from the upstream side. The portion of the pressure feed pipe 4 between the electromagnetic flow meter 5 and the first pneumatic switching valve 6 and the sludge storage tank 1 are connected by a cake return pipe 11. A pneumatic switching valve 8 is mounted. The driving of the first pneumatic switching valve 6 and the second pneumatic switching valve 8 may be, for example, motor driving. The electromagnetic flow meter 5 includes an electromagnetic transmitter 5C and a converter 9.
【００４１】ケーキ返流管１１を配置したのは、次の理
由による。焼却設備の運転を停止しておくと、圧送配管
４の中の脱水ケーキの入れ換えが無く、夏場は特に圧送
配管４内の脱水ケーキが消化発酵を起こし、圧送配管４
内にガスが共存するようになる。このようなガスが共存
した脱水ケーキが電磁式流量計５の電磁式発信器５Ｃを
通過すると、断続的な絶縁状態が起こり、所要流量とか
け離れた流量信号を発進することになり、この防止対策
として、電磁式流量計５の電磁式発信器５Ｃとあまり離
れない位置にケーキ返流管１１を分岐して汚泥貯留槽１
にガスを含んだ脱水ケーキを返流させるためである。The cake return pipe 11 is arranged for the following reason. When the operation of the incineration equipment is stopped, the dewatered cake in the pumping pipe 4 does not need to be replaced.
Gas coexists inside. When the dehydrated cake in which such gas coexists passes through the electromagnetic transmitter 5C of the electromagnetic flow meter 5, an intermittent insulation state occurs, and a flow signal which is far from the required flow rate is started. The cake return pipe 11 is branched at a position not so far from the electromagnetic transmitter 5C of the electromagnetic flow meter 5 to form a sludge storage tank 1
This is because the dehydrated cake containing gas is returned to the furnace.
【００４２】電磁式流量計５は、その電磁式発信器５Ｃ
により発生した磁界中を脱水ケーキが通過すると起電力
が発生し、この起電力を流量信号として取り出し、計測
するものである。そして、図２に示すように、上記の電
磁式流量計５は、耐酸性で且つ耐磨耗性に優れているタ
ングステンカーバイトを材料とした電極５Ａを有し、電
極５Ａは、圧送配管４の内壁面４Ａに形成された孔部４
Ｂに移動自在に設けられ、該電極５Ａの先端は内壁面４
Ａから常時は引っ込んだ状態にあり、内壁面４Ａから突
出自在になっている。即ち、常時、圧送配管４の内壁面
４Ａに常時凹部１２が形成され、この凹部１２から電極
５Ａの先端が内壁面４Ａより二点鎖線で示すように突出
するようになっている。なお、脱水ケーキの流速が１ｃ
ｍ／ｓｅｃという特に遅い条件に対しては、信号起電力
を強くした電磁式発信器（励磁コイル巻数を通常より多
くする）が用いられる。The electromagnetic flow meter 5 has an electromagnetic transmitter 5C.
When the dehydrated cake passes through the magnetic field generated by the above, an electromotive force is generated, and this electromotive force is extracted as a flow signal and measured. As shown in FIG. 2, the electromagnetic flowmeter 5 has an electrode 5A made of tungsten carbide, which is acid-resistant and has excellent wear resistance. Hole 4 formed in inner wall surface 4A
B is provided movably on the inner wall surface 4B.
A is always retracted from A, and can freely protrude from the inner wall surface 4A. That is, the recess 12 is always formed on the inner wall surface 4A of the pressure feed pipe 4, and the tip of the electrode 5A projects from the recess 12 as shown by a two-dot chain line from the inner wall surface 4A. The flow rate of the dehydrated cake is 1c
For a particularly slow condition of m / sec, an electromagnetic oscillator (in which the number of windings of the exciting coil is larger than usual) having a stronger signal electromotive force is used.
【００４３】この電極５Ａの先端が圧送配管４の内壁面
４Ａから突出すると、圧送配管４内を流れる脱水ケーキ
が移動する時に生じる摺動効果の利用により、脱水ケー
キ中の、凹部１２に滞留する絶縁性物質または気泡を除
去する構造となっている。脱水ケーキの圧送中でも、絶
縁性物質または気泡を除去でき、また、これらが凹部１
２に滞留したことが、警報装置により知らされる。When the tip of the electrode 5A protrudes from the inner wall surface 4A of the pressure feed pipe 4, the dewatered cake flowing in the pressure feed pipe 4 stays in the concave portion 12 in the dewatered cake by utilizing the sliding effect generated when moving. It has a structure to remove insulating substances or bubbles. The insulating substance or air bubbles can be removed even during the pressure feeding of the dewatered cake.
2 is notified by an alarm device.
【００４４】また、電磁式発信器５Ｃの圧送配管４にお
ける装着位置は、脱水ケーキポンプ２に近接させると、
該脱水ケーキポンプ２の突変を受けて生じる圧送配管４
内の空洞により影響されるので、脱水ケーキが充分に圧
密された場所で、且つ、例えば、脱水ケーキポンプ２の
吐出フランジからの最短距離７００ｍｍより離れた位置
で、しかも、ケーキ返流管１１をできるだけ短くするよ
うな位置が望ましいとされている。The mounting position of the electromagnetic transmitter 5C in the pressure feed pipe 4 is close to the dewatering cake pump 2,
A pressure feed pipe 4 generated by the sudden change of the dewatering cake pump 2
At a location where the dewatered cake is sufficiently compacted and at a position more than, for example, 700 mm from the shortest distance from the discharge flange of the dewatered cake pump 2, A position that is as short as possible is desirable.
【００４５】また、上記の電磁式発信器５Ｃには、変換
器９が接続され、この変換器９には調節計１０からなる
制御装置が接続され、さらに、この調節計１０はインバ
ータモータ１３を介して脱水ケーキポンプ２に接続され
ている。調節計１０には、記録計１０Ａが接続されてい
る。A converter 9 is connected to the electromagnetic transmitter 5C, and a control device including a controller 10 is connected to the converter 9, and the controller 10 further controls the inverter motor 13. It is connected to the dewatering cake pump 2 via. The recorder 10A is connected to the controller 10.
【００４６】変換器９は、電磁式発信器５Ｃで発生した
起電力を電流に変換するものである。また、電磁式流量
計５で計測した容積を重量換算するには、実使用時の圧
力で計測できる携帯用比重計で事前に、電磁式発信器５
Ｃを脱水ケーキが通過する時の圧力における脱水ケーキ
の比重を測定し、その値を重量換算係数として調節計１
０に外部入力される。このように、加圧下の脱水ケーキ
の比重を正確に測定しているので、脱水ケーキの供給量
＝（加圧下の容積）×（加圧下の比重）の値が正確にな
り、信頼性の高い計測が可能となっている。The converter 9 converts the electromotive force generated by the electromagnetic transmitter 5C into a current. Further, in order to convert the volume measured by the electromagnetic flow meter 5 into a weight, a portable specific gravity meter capable of measuring the pressure at the time of actual use is used in advance.
C. The specific gravity of the dewatered cake at the pressure at which the dewatered cake passes through C was measured, and the value was used as a weight conversion coefficient for the controller 1
Externally input to 0. As described above, since the specific gravity of the dewatered cake under pressure is accurately measured, the supply amount of the dewatered cake = (volume under pressure) × (specific gravity under pressure) is accurate, and the reliability is high. Measurement is possible.
【００４７】調節計１０からの信号が脱水ケーキポンプ
２に送られ、脱水ケーキポンプ２では、そのインバータ
モータ１３による回転数制御により脱水ケーキの供給量
の制御が行なわれる。A signal from the controller 10 is sent to the dewatering cake pump 2, and in the dewatering cake pump 2, the supply amount of the dewatered cake is controlled by controlling the rotation speed of the inverter motor 13.
【００４８】しかして、本実施例においては、炉ケーキ
投入工程が以下のように、開始される。集塵機保温工程
→焼却炉運転準備工程→バーナ燃焼工程→オイルガン燃
焼工程→ケーキ返流工程→炉ケーキ投入工程の順序で進
む。上記のケーキ返流工程は、従来例のオイルガン燃焼
工程と炉ケーキ投入工程との間に追加された工程で、そ
の詳細は図４に示される。ケーキ返流工程はタイマ工程
を有し、タイマ工程はオイルガン燃焼工程が完了してか
ら、流動媒体が焼却可能温度になるまで時間がかかるた
め、ケーキ返流開始時間を任意に変更できるようにする
ためのものである。なお、ケーキ返流工程以外の各工程
については、従来例と同様であるので、その説明を省略
する。In this embodiment, the furnace cake charging step is started as follows. The process proceeds in the following order: a dust collector warming process → an incinerator operation preparation process → a burner burning process → an oil gun burning process → a cake returning process → a furnace cake charging process. The above-mentioned cake return step is a step added between the conventional oil gun burning step and the furnace cake charging step, and details thereof are shown in FIG. The cake return step has a timer step, and since the timer step takes time from the completion of the oil gun combustion step to the temperature at which the fluidized medium can be incinerated, the cake return start time can be arbitrarily changed. It is for doing. Note that the steps other than the cake return step are the same as in the conventional example, and a description thereof will be omitted.
【００４９】ケーキ返流工程の詳細を図４により説明す
る。まず、手動操作でケーキ返流工程がスイッチオンさ
れ、以下のように工程が自動的に進む。ステップＳ１で
オイルガン燃焼工程の運転が完了すると、ステップＳ２
に進み、タイマＴ1 がオンになり、返流開始時間が設定
される。次いで、ステップＳ３に進む。ステップＳ３に
おいては、タイマＴ1 による設定時間が経過しているか
否かが判断される。設定時間が経過すると、ステップＳ
４に進む。ステップＳ４においては、ケーキ投入弁７が
閉じているか否かが判断される。ケーキ投入弁７が閉じ
ていると、ステップＳ５に進む。ステップＳ５におい
て、第１空気式切換弁６が閉じている判断されると、ス
テップＳ６で第２空気式切換弁８が開かれた後、ステッ
プＳ７に進み、第２空気式切換弁８が開いているか否か
が判断される。第２空気式切換弁８が開いていると判断
されると、ステップＳ８に進み、脱水ケーキポンプ２が
運転され、ステップＳ９に進む。The details of the cake return step will be described with reference to FIG. First, the cake return process is switched on manually, and the process automatically proceeds as follows. When the operation of the oil gun combustion process is completed in step S1, step S2
Proceeds to the timer T 1 is turned on, return flow start time is set. Next, the process proceeds to step S3. In step S3, whether the time set by the timer T 1 is has elapsed. When the set time has elapsed, step S
Proceed to 4. In step S4, it is determined whether or not cake input valve 7 is closed. If the cake input valve 7 is closed, the process proceeds to step S5. If it is determined in step S5 that the first pneumatic switching valve 6 is closed, the process proceeds to step S7 after the second pneumatic switching valve 8 is opened in step S6, and the second pneumatic switching valve 8 is opened. Is determined. If it is determined that the second pneumatic switching valve 8 is open, the flow proceeds to step S8, the dewatering cake pump 2 is operated, and the flow proceeds to step S9.
【００５０】脱水ケーキポンプ２の運転中には、図１に
示すように、点線で示す循環経路Ｘが形成され、これに
より、ガス含有ケーキが汚泥貯留槽１に返流され、圧送
配管４内が未発酵の脱水ケーキと置換される。これによ
り、流量計測した場合、所要流量とかけ離れた流量信号
を発信することが防止されている。During the operation of the dewatering cake pump 2, a circulation path X shown by a dotted line is formed as shown in FIG. 1, whereby the gas-containing cake is returned to the sludge storage tank 1, Is replaced with unfermented dewatered cake. As a result, when the flow rate is measured, it is prevented that a flow rate signal far from the required flow rate is transmitted.
【００５１】ステップＳ９において、脱水ケーキポンプ
２の回転数が設定値に達しているか否かが判断される。
回転数が設定値に達していると判断されると、ステップ
Ｓ１０に進み、汚泥貯留槽１の切出機が運転される。次
いで、ステップＳ１１に進み、汚泥貯留槽１の切出機の
回転数が設定値になっているか否かが判断され、回転数
が設定値に達していると判断されると、ステップＳ１２
に進む。In step S9, it is determined whether the rotation speed of the dewatering cake pump 2 has reached a set value.
If it is determined that the rotation speed has reached the set value, the process proceeds to step S10, and the cutter of the sludge storage tank 1 is operated. Next, the process proceeds to step S11, where it is determined whether or not the rotation speed of the cutting machine of the sludge storage tank 1 has reached a set value. If it is determined that the rotation speed has reached the set value, step S12 is performed.
Proceed to.
【００５２】ステップＳ１２においては、タイマＴ2 が
オンになり、次いで、ステップＳ１３に進み、返流が終
了しているか否かが判断される。設定時間が経過し、返
流が終了していると判断されると、ステップＳ１４に進
み、ケーキ返流工程の運転が終了し、ランプが点灯す
る。[0052] In step S12, the timer T 2 is turned on, then the process proceeds to step S13, whether return flow is finished is determined. When the set time has elapsed and it is determined that the return is completed, the process proceeds to step S14, where the operation of the cake return step is completed, and the lamp is turned on.
【００５３】次いで、焼却工程指令で、先ず、ケーキ投
入工程が手動でスイッチオンされると、第１空気式切換
弁６，第２空気式切換弁８が切り換わり以下のように、
直ちに脱水ケーキの計測がされ、図５に示すように、脱
水ケーキの供給が自動化運転される。Next, according to the incineration process command, first, when the cake charging process is manually switched on, the first pneumatic switching valve 6 and the second pneumatic switching valve 8 are switched, as follows.
The dewatered cake is measured immediately, and the supply of the dewatered cake is automated as shown in FIG.
【００５４】即ち、図５において、上述のようにステッ
プＳ１４でケーキ返流工程の運転が終了していると判断
されると、ステップＳ２１に進み、ケーキ投入弁７が開
かれる。次いで、ステップＳ２２において、ケーキ投入
弁７が開いているか否かが判断される。開いていると判
断されると、ステップＳ２３に進み、第１空気式切換弁
６が開かれる。ステップＳ２４では、第１空気式切換弁
６が開いているか否かが判断され、開いていると判断さ
れると、ステップＳ２５に進み、第２空気式切換弁８が
閉じられる。ステップＳ２６において、第２空気式切換
弁８が閉じているか否かが判断される。第２空気式切換
弁８が閉じていると、ステップＳ２７に進む。That is, in FIG. 5, when it is determined in step S14 that the operation of the cake return process has been completed as described above, the process proceeds to step S21, and the cake charging valve 7 is opened. Next, in step S22, it is determined whether or not the cake charging valve 7 is open. If it is determined to be open, the process proceeds to step S23, where the first pneumatic switching valve 6 is opened. In step S24, it is determined whether or not the first pneumatic switching valve 6 is open. If it is determined that the first pneumatic switching valve 6 is open, the process proceeds to step S25, where the second pneumatic switching valve 8 is closed. In step S26, it is determined whether the second pneumatic switching valve 8 is closed. When the second pneumatic switching valve 8 is closed, the process proceeds to step S27.
【００５５】ステップＳ２７においては、電磁式流量計
５が動作し、自動調整回路がオンになる。そして、汚泥
貯留槽１からケーキが脱水ケーキポンプ２に送られ、脱
水ケーキポンプ２により送り出された脱水ケーキが圧送
配管４を通って焼却炉３に圧送される。ここで、この脱
水ケーキポンプ２の所要出力を小さくするために、圧送
配管４中を流れる脱水ケーキの流速は、特に遅くする必
要があり、一般的には３ｃｍ／ｓｅｃ以下とされてい
る。In step S27, the electromagnetic flow meter 5 operates and the automatic adjustment circuit is turned on. Then, the cake is sent from the sludge storage tank 1 to the dewatering cake pump 2, and the dewatered cake sent out by the dewatering cake pump 2 is pressure-fed to the incinerator 3 through the pressure feeding pipe 4. Here, in order to reduce the required output of the dewatering cake pump 2, the flow rate of the dewatering cake flowing through the pressure feed pipe 4 needs to be particularly low, and is generally set to 3 cm / sec or less.
【００５６】その際、圧送配管４を通る脱水ケーキは、
電磁式発信器５Ｃにより、その流量信号起電力が計測さ
れ、その信号が変換器９により電流信号に変換され、そ
の信号が調節計１０に送られ、さらに、インバータモー
タ１３に送られる。調節計１０では、脱水ケーキの流量
から脱水ケーキポンプ２からの脱水ケーキの供給量が算
定される。調節計１０からの指令により脱水ケーキポン
プ２の入力側に装着されたインバータモータ１３が作動
され、回転数制御が行なわれ、脱水ケーキの供給量の調
整が行われる。例えば、調節計１０は、設定値に対して
現在の流量が少なければ、脱水ケーキポンプ２の回転数
を速くする信号を該脱水ケーキポンプ２に送り、常時、
設定流量になるように回転数を制御する。At this time, the dewatered cake passing through the pressure feed pipe 4 is
The electromotive force of the flow signal is measured by the electromagnetic transmitter 5C, the signal is converted into a current signal by the converter 9, and the signal is sent to the controller 10 and further sent to the inverter motor 13. The controller 10 calculates the supply amount of the dewatered cake from the dewatered cake pump 2 from the flow rate of the dewatered cake. In response to a command from the controller 10, the inverter motor 13 mounted on the input side of the dewatering cake pump 2 is operated, the number of revolutions is controlled, and the supply amount of the dewatering cake is adjusted. For example, if the current flow rate is small relative to the set value, the controller 10 sends a signal to the dewatering cake pump 2 to increase the rotation speed of the dewatering cake pump 2,
The number of revolutions is controlled so that the flow rate is set.
【００５７】このようにして、脱水ケーキポンプ２から
所定の量の脱水ケーキが、圧送配管４を通って焼却炉３
に圧送される。焼却炉３には、圧送配管４から脱水ケー
キが投入されるが、し渣及び沈砂ととにも投入するか否
かにより、次の２つの場合がある。In this manner, a predetermined amount of dewatered cake is supplied from the dewatering cake pump 2 through the pressure feed pipe 4 to the incinerator 3.
To be pumped. The dewatered cake is put into the incinerator 3 from the pressure feed pipe 4, and there are two cases depending on whether or not the dewatered cake is also put together with the residue and the sediment.
【００５８】（１）脱水ケーキのみを焼却する場合に
は、圧送配管４を焼却炉３に直接に連結し、脱水ケーキ
が焼却炉３に投入される。この場合には、図３に示すよ
うに、焼却炉３の周りに、ヘッダー管を設け、そのヘッ
ダー管に任意数のケーキ投入ノズル１４を設けた多分散
供給が可能であるから、一炉当たりの焼却規模が大きい
焼却炉３に適し、さらに、ケーキ押込機等の機械設備が
不要となり、最も経済的で且つ燃焼工学的にも優れてい
る。(1) When only the dewatered cake is incinerated, the pressure feeding pipe 4 is directly connected to the incinerator 3 and the dewatered cake is put into the incinerator 3. In this case, as shown in FIG. 3, a header pipe is provided around the incinerator 3 and the polydispersed supply in which an arbitrary number of cake injection nozzles 14 are provided in the header pipe is possible. It is suitable for the incinerator 3 having a large incineration scale, and furthermore, no mechanical equipment such as a cake pushing machine is required, and it is the most economical and excellent in combustion engineering.
【００５９】また、従来においては、ベルトコンベヤや
圧送配管で焼却炉に送られる脱水ケーキの供給量が不安
定であったので、焼却炉に脱水ケーキを供給する量を調
整するため、焼却炉にケーキ押込機を装着することが必
要であったが、本実施例では、上述のように脱水ケーキ
の供給量を正確に計測できるので、脱水ケーキの供給量
が安定し、上述のようにケーキ押込機等の機械設備を不
要にできる。Further, conventionally, the supply amount of the dewatered cake sent to the incinerator through the belt conveyor or the pressure feed pipe was unstable, so that the amount of the dewatered cake supplied to the incinerator was adjusted. Although it was necessary to attach a cake pushing machine, in the present embodiment, the supply amount of the dewatered cake can be accurately measured as described above, so that the supply amount of the dewatered cake is stable, and the cake pushing device is pushed as described above. Machines and other mechanical equipment can be eliminated.
【００６０】そして、焼却炉３に投入される脱水ケーキ
の塊が、燃焼工学的に適する大きさになるように、焼却
炉３側のノズル内部に十字型のケーキ分割カッター１５
が取り付けられている。かかる構造では、従来のケーキ
押込機等を使用しないで焼却炉３側のケーキ投入ノズル
１４に圧送配管４を直接接続できるようにしてあるの
で、供給設備の建設費が安く、またコンパクトな配置計
画ができる。Then, a cross-shaped cake splitting cutter 15 is inserted inside the nozzle on the incinerator 3 side so that the lump of the dewatered cake put into the incinerator 3 has a size suitable for combustion engineering.
Is attached. In such a structure, since the pressure feed pipe 4 can be directly connected to the cake injection nozzle 14 on the incinerator 3 side without using a conventional cake pushing machine or the like, the construction cost of the supply equipment is low and the layout plan is compact. Can be.
【００６１】（２）し渣及び沈砂（下水処理場から排出
される汚物）等を脱水ケーキとともに焼却したい場合に
は、焼却炉３内での汚物燃焼の場をフリーボード（流動
媒体のない空間部）に移行させないように、焼却炉３に
入れる直前に混練機を設け、そこに脱水ケーキと別系統
から運ばれたし渣及び沈砂を投入し、充分に混練した
後、脱水ケーキ投入機を介して焼却炉に投入される。(2) When it is desired to incinerate the residue and sediment (soil discharged from the sewage treatment plant) together with the dewatered cake, the place for burning the waste in the incinerator 3 is a free board (a space without a fluid medium). So that it does not transfer to the incinerator 3, a kneading machine is provided just before it is put into the incinerator 3, into which the dewatered cake and the sediment and sediment transported from another system are put. Through the incinerator.
【００６２】そして、上述の自動運転が終了すると、ス
テップＳ２８に進み、ケーキ投入工程の運転が終了し、
ランプが点灯する。以上の如き構成によれば、圧送配管
４の途中に、その内壁面４Ａに形成された孔部４Ｂに電
極５Ａを、該電極５Ａの先端が内壁面４Ａに対して常時
引っ込んだ状態で内壁面４Ａから突出自在になるように
移動自在に設けてなる電磁式流量計が装着され、電磁式
発信器５Ｃに取り付けてある電極５Ａが、圧送配管４の
内壁面（ライニング面）４Ａより引き込ませてあるの
で、圧送配管４の孔部４Ｂと電極５Ａの先端とで形成さ
れる凹部１２に脱水ケーキ中に混入した絶縁性物質また
は気泡が滞留しようとしても、電磁式流量計５の電極５
Ａの先端を圧送配管４の孔部４Ｂから突出させることに
より、前記凹部１２から絶縁性物質または気泡を排除す
ることができる。When the above-described automatic operation is completed, the process proceeds to step S28, where the operation of the cake charging step is completed.
The lamp lights up. According to the above configuration, the electrode 5A is inserted into the hole 4B formed in the inner wall surface 4A in the middle of the pressure feed pipe 4, and the inner wall surface is kept in a state where the tip of the electrode 5A is always retracted with respect to the inner wall surface 4A. An electromagnetic flowmeter movably provided so as to freely project from 4A is mounted, and an electrode 5A attached to an electromagnetic transmitter 5C is drawn in from an inner wall surface (lining surface) 4A of the pressure feed pipe 4. Therefore, even if an insulating substance or air bubbles mixed in the dehydrated cake is to be retained in the concave portion 12 formed by the hole 4B of the pressure feed pipe 4 and the tip of the electrode 5A, the electrode 5
By protruding the tip of A from the hole 4B of the pressure feed pipe 4, an insulating substance or air bubbles can be removed from the concave portion 12.
【００６３】上述の構造の電磁式発信器５Ｃでは、脱水
ケーキ中の無機質，繊維質等が電極に接触する時に発生
するノイズ，或いは，気泡の巻き込みを直ちに排除で
き、絶縁性物質に起因する汚泥ノイズを極端に少なくで
き、電磁式発信器５Ｃの流量信号起電力が支配的になる
ので、測定値を真の値に近づけ、制御信号として使用す
ることができ、汚泥ノイズによる計測誤差を少なくし、
圧送配管４中の脱水ケーキの正確な流量を計測をするこ
とができる。In the electromagnetic transmitter 5C having the above-mentioned structure, noise or bubbles generated when inorganic or fibrous substances in the dewatered cake come into contact with the electrodes can be immediately eliminated, and the sludge caused by the insulating material can be eliminated. Since the noise can be extremely reduced and the flow signal electromotive force of the electromagnetic transmitter 5C becomes dominant, the measured value approaches the true value and can be used as a control signal, and the measurement error due to sludge noise is reduced. ,
An accurate flow rate of the dewatered cake in the pressure feeding pipe 4 can be measured.
【００６４】かかる脱水ケーキの正確な流量の計測が上
述のように可能になったので、圧送配管４に電磁式発信
器５Ｃを設置することが可能になり、電磁式発信器５Ｃ
を脱水ケーキの流量検出手段として構成し、焼却炉３に
所定の供給量の脱水ケーキを精度良く供給する下水汚泥
焼却設備の脱水ケーキ供給装置を構成することができ
る。Since the accurate measurement of the flow rate of the dewatered cake has become possible as described above, the electromagnetic transmitter 5C can be installed in the pressure feed pipe 4, and the electromagnetic transmitter 5C
As a dewatering cake flow rate detecting means, and a dewatering cake supply device of a sewage sludge incineration facility that supplies a predetermined amount of dewatered cake to the incinerator 3 with high accuracy.
【００６５】また、圧送配管４の凹部１２に、脱水ケー
キ中に混入した絶縁性物質が付着しても、電磁式流量計
５の電極５Ａを圧送配管４の内壁面４Ａから突出させて
除去するのは簡単な操作なので、特殊技能者でなくても
一般の能力を有する技能者でもできる。Even if the insulating substance mixed in the dewatered cake adheres to the concave portion 12 of the pressure feed pipe 4, the electrode 5A of the electromagnetic flow meter 5 is removed by protruding from the inner wall surface 4A of the pressure feed pipe 4. Since this is a simple operation, it can be performed by a technician who has general abilities without being a special technician.
【００６６】詳しく述べると、汚泥ノイズ特性を調べる
と、汚泥ノイズは流量信号として取り出す起電力と周波
数との間に、或る相関関係があることが判明した。即
ち、汚泥ノイズは、その起電力周波数（０ＨZ 〜１００
ＨZ ）が高くなるに従ってノイズレベルが指数関数的に
少なくなる。この汚泥ノイズ特性は、電極の材質及び電
極取付形状によってその傾向及びノイズレベルの絶対値
が変わることである。More specifically, when the sludge noise characteristics were examined, it was found that the sludge noise had a certain correlation between the electromotive force extracted as a flow rate signal and the frequency. That is, the sludge noise, the electromotive force frequency (0H Z to 100
The noise level decreases exponentially as HZ ) increases. The sludge noise characteristic is that the tendency and the absolute value of the noise level change depending on the electrode material and the electrode mounting shape.
【００６７】これらのノイズ特性を低減することによっ
て、計測精度の高い流量測定ができる。そして、また、
例えば圧送配管４内の脱水ケーキが消化発酵を起こし、
圧送配管内４にガスが共存しても、ケーキ返流管１１を
介して汚泥貯留槽１にガスを逃がした状態で、当該下水
汚泥焼却設備の脱水ケーキ供給装置を運転することがで
きるので、ガスが排除された脱水ケーキを電磁式流量計
５を通過させることができ、従って、電磁式流量計５の
凹部１２にガスが滞留することを防止し、電磁式流量計
の検出精度を確実に確保でき、脱水ケーキの流量の計測
精度を確保できる。By reducing these noise characteristics, flow measurement with high measurement accuracy can be performed. and again,
For example, the dewatered cake in the pressure feed pipe 4 causes digestive fermentation,
Even if gas coexists in the pressure feed pipe 4, the dewatered cake supply device of the sewage sludge incineration facility can be operated in a state where the gas is released to the sludge storage tank 1 via the cake return pipe 11. The dewatered cake from which the gas has been removed can be passed through the electromagnetic flow meter 5, thus preventing the gas from staying in the recess 12 of the electromagnetic flow meter 5 and ensuring the detection accuracy of the electromagnetic flow meter. It is possible to secure the measurement accuracy of the flow rate of the dewatered cake.
【００６８】[0068]
【発明の効果】以上説明したように、請求項１記載の発
明によれば、圧送配管の途中に、その内壁面に形成され
た孔部に電極を、該電極の先端が内壁面に対して常時引
っ込んだ状態で内壁面から突出自在になるように移動自
在に設けてなる電磁式流量計が装着され、電磁式流量計
の電極が、圧送配管の内壁面より引き込ませてあるの
で、圧送配管の孔部と電極の先端とで形成される凹部に
脱水ケーキ中に混入した絶縁性物質または気泡が滞留し
ようとしても、電磁式流量計の電極の先端を圧送配管の
孔部において圧送配管の内壁面から突出させることによ
り、前記凹部から絶縁性物質または気泡を排除すること
ができる。As described above, according to the first aspect of the present invention, an electrode is formed in the hole formed in the inner wall surface of the pressure feeding pipe, and the tip of the electrode is formed in the inner wall surface. An electromagnetic flowmeter, which is movably provided so as to be able to protrude from the inner wall surface in a state where it is always retracted, is mounted, and the electrodes of the electromagnetic flowmeter are drawn in from the inner wall surface of the pressure feed pipe. Even if an insulating substance or air bubbles mixed in the dewatered cake is going to stay in the concave portion formed by the hole of the electrode and the tip of the electrode, the tip of the electrode of the electromagnetic flow meter should By protruding from the wall surface, an insulating substance or air bubbles can be eliminated from the recess.
【００６９】上述の構造の電磁式流量計では、脱水ケー
キ中の無機質，繊維質等が電極に接触する時に発生する
ノイズ，或いは，気泡の巻き込みを直ちに排除でき、絶
縁性物質に起因する汚泥ノイズを極端に少なくでき、電
磁式流量計の流量信号起電力が支配的になるので、測定
値を真の値に近づけ、制御信号として使用することがで
き、汚泥ノイズによる計測誤差を少なくし、圧送配管中
の脱水ケーキの正確な流量を計測をすることができる。In the electromagnetic flowmeter having the above-described structure, noise generated when inorganic or fibrous substances in the dewatered cake come into contact with the electrode, or entrainment of air bubbles can be immediately eliminated, and sludge noise caused by the insulating material can be eliminated. And the flow signal electromotive force of the electromagnetic flow meter becomes dominant, so that the measured value can be close to the true value and used as a control signal, reducing measurement errors due to sludge noise and pumping. The accurate flow rate of the dewatered cake in the pipe can be measured.
【００７０】かかる脱水ケーキの正確な流量の計測が上
述のように可能になったので、圧送配管に電磁式流量計
を設置することが可能になり、電磁式流量計を流量検出
手段として構成し、焼却炉に所定の供給量の脱水ケーキ
を精度良く供給する下水汚泥焼却設備の脱水ケーキ供給
装置を構成することができる。Since accurate measurement of the flow rate of the dewatered cake has become possible as described above, it becomes possible to install an electromagnetic flow meter in the pressure feed pipe, and the electromagnetic flow meter is constituted as a flow rate detecting means. In addition, it is possible to configure a dewatering cake supply device of a sewage sludge incineration facility that supplies a predetermined amount of dewatered cake to an incinerator with high accuracy.
【００７１】また、圧送配管の凹部に、ケーキ中に混入
した絶縁性物質が付着しても、電磁式流量計の電極を圧
送配管の内壁面から突出させて除去するのは簡単な操作
なので、特殊技能者でなくても一般の能力を有する技能
者でもできる。Even if the insulating substance mixed in the cake adheres to the concave portion of the pressure feed pipe, it is a simple operation to remove the electrode of the electromagnetic flow meter by projecting it from the inner wall surface of the pressure feed pipe. Even if it is not a special technician, it can be a technician with general abilities.
【００７２】請求項２記載の発明によれば、請求項１記
載の発明に加えて、圧送配管内にガスが共存しても、ケ
ーキ返流管を介して汚泥貯留槽にガスを逃がした状態
で、当該下水汚泥焼却設備の脱水ケーキ供給装置を運転
することができるので、ガスが排除された脱水ケーキを
電磁式流量計を通過させることができ、従って、共存ガ
スによる流量信号の突変も無く、電磁式流量計の凹部に
ガスが滞留することを防止し、電磁式流量計の検出精度
を確実に確保でき、脱水ケーキの流量の計測精度を確保
できる。According to the second aspect of the present invention, in addition to the first aspect, even if gas is present in the pressure feed pipe, the gas is released to the sludge storage tank via the cake return pipe. Therefore, since the dewatered cake supply device of the sewage sludge incineration equipment can be operated, the dewatered cake from which gas has been removed can pass through the electromagnetic flow meter. Therefore, the gas can be prevented from staying in the recess of the electromagnetic flow meter, the detection accuracy of the electromagnetic flow meter can be ensured, and the measurement accuracy of the flow rate of the dewatered cake can be ensured.
【００７３】請求項３記載の発明によれば、計測供給自
動運転開始前に圧送配管内の発酵したガスを含有した脱
水ケーキを汚泥貯留槽に返流した後、圧送配管内に未発
酵の脱水ケーキを充満させた状態で、圧送配管を介して
焼却炉へ送ることにより、流量計測した場合、所要流量
とかけ離れた流量信号を発信することを防止できる。According to the third aspect of the present invention, the dewatered cake containing the fermented gas in the pressure feed pipe is returned to the sludge storage tank before the automatic operation of measuring and feeding starts, and then the unfermented dewatered cake is fed into the pressure feed pipe. When the cake is filled and sent to the incinerator via the pressure feed pipe, when the flow rate is measured, it is possible to prevent the transmission of a flow rate signal far from the required flow rate.
【００７４】請求項４記載の発明によれば、請求項１ま
たは２記載の下水汚泥焼却設備の脱水ケーキ供給装置に
おいて、焼却炉に、その周りに沿って複数のケーキ投入
ノズルを設け、複数のケーキ投入ノズルを圧送配管に接
続したので、焼却炉内への脱水ケーキの多分散供給を可
能にし、一炉当たりの焼却規模が大きい焼却炉に対応
し、さらに、ケーキ投入機等の機械設備を不要にするこ
とができる。According to the fourth aspect of the present invention, in the dewatered cake supply device of the sewage sludge incineration equipment according to the first or second aspect, the incinerator is provided with a plurality of cake input nozzles along the periphery thereof, and Since the cake injection nozzle is connected to the pressure feed pipe, it is possible to supply polydispersed dewatered cakes into the incinerator, to accommodate incinerators with a large incineration scale per incinerator, and to use mechanical equipment such as a cake injecting machine. It can be unnecessary.
【００７５】請求項５記載の発明によれば、請求項４記
載の下水汚泥焼却設備の脱水ケーキ供給装置において、
ケーキ投入ノズルには、ケーキ分割カッターが取り付け
られているので、焼却炉に投入される脱水ケーキの塊が
燃焼工学的に適する大きさに分割することができる。According to the fifth aspect of the present invention, in the dewatered cake supply device of the sewage sludge incineration equipment according to the fourth aspect,
Since a cake splitting cutter is attached to the cake input nozzle, the lump of the dewatered cake put into the incinerator can be split into a size suitable for combustion engineering.
【００７６】請求項６記載の発明によれば、請求項１ま
たは２記載の下水汚泥焼却設備の脱水ケーキ供給装置の
運転方法において、脱水ケーキと、し渣及び沈砂を混練
した後、これらを焼却炉に投入することより、脱水ケー
キと、し渣及び沈砂を同時に焼却できる。According to the sixth aspect of the present invention, in the method for operating the dewatered cake supply device of the sewage sludge incineration equipment according to the first or second aspect, the dewatered cake, the residue and the sediment are kneaded and then incinerated. By putting it in the furnace, the dewatered cake, the residue and the sediment can be incinerated at the same time.
【図１】本発明の実施例に係わる下水汚泥焼却設備の脱
水ケーキ供給装置の構成図である。FIG. 1 is a configuration diagram of a dewatering cake supply device of a sewage sludge incineration plant according to an embodiment of the present invention.
【図２】同脱水ケーキ供給装置の電磁式流量計の取付状
態を示す圧送配管の縦断面図である。FIG. 2 is a longitudinal sectional view of a pressure feeding pipe showing an attached state of an electromagnetic flow meter of the dewatering cake supply device.
【図３】同脱水ケーキ供給装置における焼却炉の脱水ケ
ーキ投入部付近の断面図である。FIG. 3 is a cross-sectional view showing the vicinity of a dewatering cake input portion of an incinerator in the dewatering cake supply device.
【図４】ケーキ返流工程を示すフローチャート図であ
る。FIG. 4 is a flowchart showing a cake return process.
【図５】ケーキ投入工程を示すフローチャート図であ
る。FIG. 5 is a flowchart showing a cake charging step.
【図６】従来における第１の下水汚泥焼却設備の脱水ケ
ーキ供給装置の構成図である。FIG. 6 is a configuration diagram of a conventional dewatering cake supply device of a first sewage sludge incineration facility.
【図７】従来における第２の下水汚泥焼却設備の脱水ケ
ーキ供給装置の構成図である。FIG. 7 is a configuration diagram of a conventional dewatering cake supply device of a second sewage sludge incineration facility.
【図８】従来における第３の下水汚泥焼却設備の脱水ケ
ーキ供給装置の構成図である。FIG. 8 is a configuration diagram of a dewatering cake supply device of a third conventional sewage sludge incineration facility.
【図９】図８の脱水ケーキ供給装置の圧送配管の縦断面
図である。9 is a vertical sectional view of a pressure feeding pipe of the dewatering cake supply device of FIG.
１ 汚泥貯留槽 ２ 脱水ケーキポンプ ３ 焼却炉 ４ 圧送配管 ４Ａ 内壁面 ４Ｂ 孔部 ５ 電磁式流量計 ５Ａ 電極 １０ 調節計（制御装置） DESCRIPTION OF SYMBOLS 1 Sludge storage tank 2 Dehydration cake pump 3 Incinerator 4 Pumping piping 4A Inner wall surface 4B Hole 5 Electromagnetic flow meter 5A Electrode 10 Controller (control device)
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｆ２３Ｇ 7/00 １０４ Ｆ２３Ｇ 7/00 １０４Ａ ＺＡＢ ＺＡＢ (56)参考文献 特開 昭54−84377（ＪＰ，Ａ) 特開 昭60−64117（ＪＰ，Ａ) 特開 平２−187511（ＪＰ，Ａ) 特開 昭63−143412（ＪＰ，Ａ) 特開 平３−248019（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) F23G 5/50 ZAB C02F 11/00 C02F 11/06 F23G 5/02 ZAB F23G 7/00 104 ──────────────────────────────────────────────────続 き Continuation of the front page (51) Int.Cl. 7 Identification symbol FI F23G 7/00 104 F23G 7/00 104A ZAB ZAB (56) References JP-A-54-84377 (JP, A) JP-A-60 -64117 (JP, A) JP-A-2-187511 (JP, A) JP-A-63-143412 (JP, A) JP-A-3-248019 (JP, A) (58) Fields investigated (Int. . 7, DB name) F23G 5/50 ZAB C02F 11/00 C02F 11/06 F23G 5/02 ZAB F23G 7/00 104
Claims (6)
る下水汚泥焼却設備の脱水ケーキ供給装置において、 汚泥貯留槽の下方に脱水ケーキポンプを設置し、この脱
水ケーキポンプと焼却炉を圧送配管を介して接続し、 圧送配管の途中に、その内壁面に形成された孔部に電極
を、該電極の先端が内壁面に対して常時引っ込んだ状態
で内壁面から突出自在になるように移動自在に設けてな
る電磁式流量計を装着し、 前記電磁式流量計からの信号により、脱水ケーキポンプ
に所定の供給量を出力させる制御装置を配置したことを
特徴とする下水汚泥焼却設備の脱水ケーキ供給装置。1. A dewatering cake supply device of a sewage sludge incineration facility for sending dewatered cake from a sludge storage tank to an incinerator, wherein a dewatering cake pump is installed below the sludge storage tank, and the dewatering cake pump and the incinerator are pressure-piped. In the middle of the pressure feed pipe, the electrode is moved into a hole formed in the inner wall surface so that the tip of the electrode is always retracted with respect to the inner wall surface so that the electrode can freely protrude from the inner wall surface. Dewatering of sewage sludge incineration equipment characterized by mounting an electromagnetic flowmeter freely provided, and a control device for outputting a predetermined supply amount to a dewatering cake pump by a signal from the electromagnetic flowmeter. Cake feeding device.
る下水汚泥焼却設備の脱水ケーキ供給装置において、 汚泥貯留槽の下方に脱水ケーキポンプを設置し、この脱
水ケーキポンプと焼却炉を圧送配管を介して接続し、 圧送配管の途中に、その内壁面に形成された孔部に電極
を、該電極の先端が内壁面に対して常時引っ込んだ状態
で内壁面から突出自在になるように移動自在に設けてな
る電磁式流量計を装着し、 前記電磁式流量計からの信号により、脱水ケーキポンプ
に所定の供給量を出力させる制御装置を配置し、 圧送配管の途中に切換弁を装着し、 圧送配管の切換弁の上流側部分と汚泥貯留槽をケーキ返
流管で接続したことを特徴とする下水汚泥焼却設備の脱
水ケーキ供給装置。2. A dewatering cake supply device of a sewage sludge incineration facility for sending dewatered cake from a sludge storage tank to an incinerator, wherein a dewatering cake pump is installed below the sludge storage tank, and the dewatering cake pump and the incinerator are pressure-pumped. In the middle of the pressure feed pipe, the electrode is moved into a hole formed in the inner wall surface so that the tip of the electrode is always retracted with respect to the inner wall surface so that the electrode can freely protrude from the inner wall surface. An electromagnetic flow meter that is freely provided is mounted, a control device that outputs a predetermined supply amount to the dewatering cake pump according to a signal from the electromagnetic flow meter is arranged, and a switching valve is mounted in the middle of the pressure feeding pipe. A dewatered cake supply device for sewage sludge incineration equipment, wherein an upstream portion of a switching valve of a pressure feed pipe and a sludge storage tank are connected by a cake return pipe.
発酵したガスを含有した脱水ケーキを汚泥貯留槽に返流
した後、圧送配管内に未発酵の脱水ケーキを充満させた
状態で、圧送配管を介して焼却炉へ送ることを特徴とす
る請求項２記載の下水汚泥焼却設備の脱水ケーキ供給装
置の運転方法。3. After the dewatered cake containing the fermented gas in the pressure feed pipe is returned to the sludge storage tank before the automatic start of the measurement supply automatic operation, the pressure feed pipe is filled with an unfermented dehydrated cake. 3. The method for operating a dewatering cake supply device of a sewage sludge incineration plant according to claim 2, wherein the device is sent to an incinerator via a pressure feed pipe.
キ投入ノズルを設け、複数のケーキ投入ノズルを圧送配
管に接続したことを特徴とする請求項１または２記載の
下水汚泥焼却設備の脱水ケーキ供給装置。4. The sewage sludge incineration plant according to claim 1, wherein the incinerator is provided with a plurality of cake charging nozzles along the periphery thereof, and the plurality of cake charging nozzles are connected to a pressure feed pipe. Dewatering cake supply device.
ターが取り付けられていることを特徴とする請求項４記
載の下水汚泥焼却設備の脱水ケーキ供給装置。5. The dewatered cake supply device for sewage sludge incineration equipment according to claim 4, wherein a cake dividing cutter is attached to the cake input nozzle.
後、これらを焼却炉に投入することを特徴とする請求項
１または２記載の下水汚泥焼却設備の脱水ケーキ供給装
置の運転方法。6. The method for operating a dewatering cake supply device of a sewage sludge incineration plant according to claim 1, wherein the dewatered cake, the residue and the sediment are kneaded, and then kneaded into an incinerator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1276493A JP3063874B2 (en) | 1993-01-28 | 1993-01-28 | Dewatering cake supply device for sewage sludge incineration equipment and its operation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1276493A JP3063874B2 (en) | 1993-01-28 | 1993-01-28 | Dewatering cake supply device for sewage sludge incineration equipment and its operation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06221537A JPH06221537A (en) | 1994-08-09 |
| JP3063874B2 true JP3063874B2 (en) | 2000-07-12 |
Family
ID=11814470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1276493A Expired - Lifetime JP3063874B2 (en) | 1993-01-28 | 1993-01-28 | Dewatering cake supply device for sewage sludge incineration equipment and its operation method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3063874B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3978696B2 (en) * | 1998-02-13 | 2007-09-19 | 三菱マテリアル株式会社 | Sludge treatment system |
| JP4624573B2 (en) * | 2001-01-31 | 2011-02-02 | 三菱重工環境・化学エンジニアリング株式会社 | Recycling method for carbonized products derived from unsuitable fermentation |
| JP5315736B2 (en) * | 2008-03-19 | 2013-10-16 | 宇部興産株式会社 | Treatment method of hydrous sludge |
-
1993
- 1993-01-28 JP JP1276493A patent/JP3063874B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06221537A (en) | 1994-08-09 |
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