JP2013158730A - Device and method for controlling operation of water treatment facility - Google Patents

Device and method for controlling operation of water treatment facility Download PDF

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JP2013158730A
JP2013158730A JP2012023980A JP2012023980A JP2013158730A JP 2013158730 A JP2013158730 A JP 2013158730A JP 2012023980 A JP2012023980 A JP 2012023980A JP 2012023980 A JP2012023980 A JP 2012023980A JP 2013158730 A JP2013158730 A JP 2013158730A
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demand
supply
power
water treatment
facility
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JP5981156B2 (en
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Ko Nanbu
耕 南部
Hiroshi Shimizu
浩 清水
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Metawater Co Ltd
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    • YGENERAL 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
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Abstract

PROBLEM TO BE SOLVED: To achieve energy production by reducing electric power consumption and COdischarge of entire water treatment facilities, by reducing electric power supply costs, by making equipment operation highly efficient, by reducing the running costs of plants, and by efficient operating privately owned electrical power facilities.SOLUTION: A power generation forecast part 101 prepares an operation plan of a power generation facility 112 within a prescribed period of time, and a demand forecast part 102 prepares an operation plan of load facility 113 within a prescribed period of time. A demand adjustment part 103, based on the operation plan of the power generation facility 112 and the operation plan of the load facility 113, adjusts at least either the operation plan of the power generation facility 112 or the operation plan of the load facility 113 so as to keep the power demand below the power supply in consideration of a predetermined marginal supply capability, and a demand control part 104 controls the operation of the power generation facility 112 and the load facility 113 based on adjusted operation plans.

Description

本発明は、水処理設備の運転制御装置及び運転制御方法に関する。   The present invention relates to an operation control device and an operation control method for water treatment facilities.

一般に、汚水処理(下水道)、浄水処理(上水道)、及び産業用工業用水・排水処理等を行う水処理設備では、パターン化された制定値に基づく運転方式や成り行きによる運転方式に従って運転制御が実施されている(例えば特許文献1参照)。すなわち、従来の水処理設備では、原則として需要を優先し、商用電力系統からの受電や自家発電機等による発電によって電力、電力量、及び質(周波数、電圧)を需要に追従して確保する運転が実施されている。   In general, in water treatment facilities that handle sewage treatment (sewage), water purification (water supply), industrial industrial water and wastewater treatment, etc., operation control is performed according to the operation method based on patterned established values or the operation method by event. (For example, refer to Patent Document 1). That is, in conventional water treatment facilities, priority is given to demand in principle, and power, electric energy, and quality (frequency, voltage) are secured following demand by receiving power from the commercial power system or by power generation by private power generators. Driving is being carried out.

特開2011−183353号公報JP 2011-183353 A

しかしながら、従来の水処理設備の運転制御方法では、水処理設備を構成するポンプや送風機等の機器は、稼働状況を監視する検出器からの数値データやオン/オフ等の状態データといったトレンドデータに基づいて個別に制御される。このため、従来の水処理設備の運転制御方法によれば、稼働している機器の数に過不足が発生する、機器稼動/停止のタイミングが取れていない、前段/後段の処理設備との連携性が密に取れていない等、必ずしも電力消費量やCO排出量の抑制、電力供給コストの低減、機器稼動の高効率化、プラントのランニングコストの低減、及び自家発電設備の効率的稼動による創エネルギーの観点から水処理設備全体の最適な運転制御が実施されていない。このような背景から、水処理設備全体の電力消費量やCO排出量を必要最小限に抑制すると共に、電力供給コストの低減、機器稼動の高効率化、プラントのランニングコストの低減、及び自家発電設備の効率的稼動による創エネルギーを実現可能な水処理設備の運転制御方法の提供が期待されていた。 However, in the conventional operation control method for water treatment facilities, devices such as pumps and blowers that make up the water treatment facility are subject to trend data such as numerical data from detectors that monitor the operation status and state data such as on / off. Based on individual control. For this reason, according to the conventional operation control method for water treatment facilities, there is an excess or deficiency in the number of devices in operation, the device operation / stop timing has not been taken, and the linkage with the front / rear treatment facilities The power consumption and CO 2 emissions are necessarily reduced, power supply costs are reduced, equipment operation is highly efficient, plant running costs are reduced, and private power generation facilities are efficiently operated. From the viewpoint of energy creation, optimal operation control of the entire water treatment facility is not implemented. Against this background, the power consumption and CO 2 emissions of the water treatment facility as a whole are suppressed to the minimum necessary, the power supply cost is reduced, the efficiency of equipment operation is increased, the plant running cost is reduced, and private use It was expected to provide a method for controlling the operation of water treatment facilities that can realize energy creation through efficient operation of power generation facilities.

本発明は、上記課題に鑑みてなされたものであって、その目的は、水処理設備全体の電力消費量やCO排出量を抑制すると共に、電力供給コストの低減、機器稼動の高効率化、プラントのランニングコストの低減、及び自家発電設備の効率的稼動による創エネルギーを実現可能な水処理設備の運転制御装置及び運転制御方法を提供することにある。 The present invention has been made in view of the above problems, and its purpose is to suppress the power consumption and CO 2 emission of the entire water treatment facility, reduce the power supply cost, and increase the efficiency of equipment operation. Another object of the present invention is to provide an operation control device and an operation control method for a water treatment facility capable of reducing plant running costs and realizing energy creation through efficient operation of private power generation facilities.

上記課題を解決し、目的を達成するために、本発明に係る水処理設備の運転制御装置は、効率、コスト、及びCO排出量が所定条件を満足することを条件として、所定期間内における水処理設備の電力需要及び需要量と該所定期間内における該水処理設備に電力を供給する自家発電設備の電力供給力及び供給量とを調整し、自家発電設備の稼働計画と水処理設備の稼働計画とを作成する需給調整手段と、前記需給調整手段によって調整された稼働計画に基づいて、前記自家発電設備及び水処理設備の動作を制御する需給制御手段と、を備えることを特徴とする。 In order to solve the above-described problems and achieve the object, the operation control apparatus for water treatment facilities according to the present invention is within a predetermined period on condition that the efficiency, cost, and CO 2 emission amount satisfy the predetermined conditions. By adjusting the power demand and demand of the water treatment facility and the power supply capacity and supply amount of the private power generation facility that supplies power to the water treatment facility within the predetermined period, the operation plan of the private power generation facility and the water treatment facility Supply and demand adjustment means for creating an operation plan, and supply and demand control means for controlling the operation of the private power generation equipment and water treatment equipment based on the operation plan adjusted by the supply and demand adjustment means .

本発明に係る水処理設備の運転制御装置は、上記発明において、所定期間内における水処理設備の稼働計画を作成する電力需要予測手段と、前記所定期間内における前記自家発電設備の稼働計画を作成する電力供給予測手段と、を備え、前記需給調整手段は、前記電力供給予測手段によって作成された自家発電設備の稼働計画と前記電力需要予測手段によって作成された水処理設備の稼働計画とに基づいて、電力需要及び需要量が所定の供給予備力を考慮した電力供給力及び供給量を下回るように自家発電設備の稼働計画と水処理設備の稼働計画との少なくとも一方を調整する需給調整手段と、前記需給制御手段は、前記需給調整手段によって調整された稼働計画に基づいて、自家発電設備及び水処理設備の動作を制御することを特徴とする。   The operation control apparatus for a water treatment facility according to the present invention, in the above invention, creates a power demand prediction means for creating an operation plan for the water treatment facility within a predetermined period, and an operation plan for the private power generation facility within the predetermined period Power supply prediction means, and the supply and demand adjustment means is based on the operation plan of the private power generation facility created by the power supply prediction means and the operation plan of the water treatment facility created by the power demand prediction means Supply and demand adjustment means for adjusting at least one of the operation plan of the private power generation facility and the operation plan of the water treatment facility so that the power demand and the demand amount are less than the power supply capability and the supply amount considering the predetermined reserve capacity The supply and demand control means controls the operations of the private power generation facility and the water treatment facility based on the operation plan adjusted by the supply and demand adjustment means.

本発明に係る水処理設備の運転制御装置は、上記発明において、前記需給調整手段が、電力供給力及び供給量からの電力需要及び需要量の超過分を電力需要及び需要量が電力供給力及び供給量未満である期間にシフトすることによって、電力需要及び需要量が所定の供給予備力を考慮した電力供給力及び供給量を下回るように調整することを特徴とする。   The operation control apparatus for a water treatment facility according to the present invention is the operation control device according to the present invention, wherein the supply and demand adjustment means uses the power supply capacity and the excess amount of the demand amount from the power supply capacity and supply amount as the power supply capacity and By shifting to a period that is less than the supply amount, the power demand and the demand amount are adjusted to be lower than the power supply capability and the supply amount considering a predetermined supply reserve capacity.

本発明に係る水処理設備の運転制御装置は、上記発明において、前記需給調整手段が、電力供給力及び供給量からの電力需要及び需要量の超過分を削除することによって、電力需要及び需要量が所定の供給予備力を考慮した電力供給力及び供給量を下回るように調整することを特徴とする。   In the operation control device for water treatment facilities according to the present invention, in the above invention, the supply and demand adjustment means deletes the power demand from the power supply capacity and the supply amount and the excess of the demand amount, whereby the power demand and the demand amount. Is adjusted so as to be less than the power supply capacity and supply amount in consideration of a predetermined supply reserve capacity.

本発明に係る水処理設備の運転制御装置は、上記発明において、前記電力供給予測手段及び前記電力需要予測手段が、自家発電設備及び水処理設備の稼働状況に関する情報と電力需要及び需要量と電力供給力及び供給量との予測に関連性が強い情報とを用いて、自家発電設備及び水処理設備の稼働計画を作成することを特徴とする。   The operation control apparatus for a water treatment facility according to the present invention is the operation control device according to the present invention, wherein the power supply prediction means and the power demand prediction means include information on the operating status of the private power generation facility and the water treatment facility, the power demand, the demand amount, and the power. An operation plan of the private power generation facility and the water treatment facility is created using information that is strongly related to the prediction of the supply capacity and the supply amount.

本発明に係る水処理設備の運転制御装置は、上記発明において、電力需要及び需要量と電力供給力及び供給量との予測に関連性が強い情報が、処理水の水質、処理水の貯水池の水位、天気、及び季節に関する情報を少なくとも含むことを特徴とする。   The operation control apparatus of the water treatment facility according to the present invention is characterized in that, in the above-described invention, information that is strongly related to prediction of power demand, demand amount, power supply capacity, and supply amount is treated water quality, treated water reservoir It includes at least information on water level, weather, and season.

上記課題を解決し、目的を達成するために、本発明に係る水処理設備の運転制御方法は、効率、コスト、及びCO排出量が所定条件を満足することを条件として、所定期間内における水処理設備の電力需要及び需要量と該所定期間内における該水処理設備に電力を供給する自家発電設備の電力供給力及び供給量とを調整し、自家発電設備の稼働計画と水処理設備の稼働計画とを作成する需給調整ステップと、前記需給調整ステップにおいて調整された稼働計画に基づいて、前記自家発電設備及び水処理設備の動作を制御する需給制御ステップと、を含むことを特徴とする。 In order to solve the above problems and achieve the object, an operation control method of a water treatment facility according to the present invention is within a predetermined period on condition that the efficiency, cost, and CO 2 emission amount satisfy predetermined conditions. By adjusting the power demand and demand of the water treatment facility and the power supply capacity and supply amount of the private power generation facility that supplies power to the water treatment facility within the predetermined period, the operation plan of the private power generation facility and the water treatment facility A supply and demand adjustment step for creating an operation plan, and a supply and demand control step for controlling the operation of the private power generation facility and the water treatment facility based on the operation plan adjusted in the supply and demand adjustment step. .

本発明に係る水処理設備の運転制御装置及び運転制御方法によれば、水処理設備全体の電力消費量やCO排出量すると共に、電力供給コストの低減、機器稼動の高効率化、プラントのランニングコストの低減、及び電力供給設備の効率的稼動による創エネルギーを実現することができる。 According to the operation control apparatus and operation control method for water treatment facilities according to the present invention, the power consumption and CO 2 emissions of the entire water treatment facility are reduced, the power supply cost is reduced, the efficiency of equipment operation is increased, It is possible to realize energy creation through reduction of running costs and efficient operation of power supply facilities.

図1は、本発明の一実施形態である下水処理場の運転制御装置の制御対象となる下水処理場の一構成例を示す模式図である。Drawing 1 is a mimetic diagram showing the example of 1 composition of the sewage treatment plant used as the control object of the operation control device of the sewage treatment plant which is one embodiment of the present invention. 図2は、本発明の一実施形態である下水処理場の運転制御装置の構成を示すブロック図である。FIG. 2 is a block diagram showing a configuration of an operation control device for a sewage treatment plant according to an embodiment of the present invention. 図3は、本発明の一実施形態である下水処理場の運転制御処理の流れを示すフローチャートである。FIG. 3 is a flowchart showing a flow of operation control processing of the sewage treatment plant which is one embodiment of the present invention. 図4は、電力の供給計画及び需要計画の調整方法の一例を説明するための図である。FIG. 4 is a diagram for explaining an example of a method for adjusting a power supply plan and a demand plan. 図5は、電力の供給計画及び需要計画の調整方法の一例を説明するための図である。FIG. 5 is a diagram for explaining an example of a method for adjusting a power supply plan and a demand plan.

以下、図面を参照して、本発明の一実施形態である下水処理場の運転制御装置について説明する。なお、本実施形態は、本発明を下水処理場の運転制御に適用したものであるが、本発明は、本実施形態に限定されることはなく、汚水処理(下水道)、浄水処理(上水道)、及び産業用工業用水・排水処理等を行う水処理設備等の下水処理場以外の水処理設備にも適用することができる。   Hereinafter, an operation control apparatus for a sewage treatment plant according to an embodiment of the present invention will be described with reference to the drawings. In addition, although this embodiment applies this invention to the operation control of a sewage treatment plant, this invention is not limited to this embodiment, Sewage treatment (sewage), purified water treatment (waterworks) It can also be applied to water treatment facilities other than sewage treatment plants, such as water treatment facilities for industrial industrial water and wastewater treatment.

〔下水処理場の構成〕
始めに、図1を参照して、本発明の一実施形態である下水処理場の運転制御装置の制御対象となる下水処理場の構成について説明する。但し、下水処理場の構成は図1に示す構成に限定されることはない。
[Configuration of sewage treatment plant]
First, with reference to FIG. 1, the structure of the sewage treatment plant used as the control object of the operation control apparatus of the sewage treatment plant which is one Embodiment of this invention is demonstrated. However, the configuration of the sewage treatment plant is not limited to the configuration shown in FIG.

図1は、本発明の一実施形態である下水処理場の運転制御装置の制御対象となる下水処理場の一構成例を示す模式図である。図1に示すように、下水処理場は、下水を処理する下水処理設備1と、下水処理設備1で発生した余剰汚泥を処理する汚泥処理設備2と、を備えている。   Drawing 1 is a mimetic diagram showing the example of 1 composition of the sewage treatment plant used as the control object of the operation control device of the sewage treatment plant which is one embodiment of the present invention. As shown in FIG. 1, the sewage treatment plant includes a sewage treatment facility 1 for treating sewage and a sludge treatment facility 2 for treating excess sludge generated in the sewage treatment facility 1.

下水処理設備1は、沈砂池11と、最初沈殿池12と、反応槽13と、最終沈殿池14と、薬注槽15と、を備えている。沈砂池11は、下水中の土砂等の非腐敗性無機物質を沈殿除去するための設備であり、非腐敗性無機物質が除去された下水は汚水ポンプ16によって最初沈殿池12に供給される。最初沈殿池12は、下水を緩やかに流して重力沈降によって下水中の沈殿性有機物を沈殿除去するための設備である。最初沈殿池12の上澄み水は反応槽13に供給される。最初沈殿池12内の沈殿物は、汚泥掻寄機17aによって集められ、汚泥引き抜きポンプ18によって余剰汚泥として汚泥処理設備2に供給される。   The sewage treatment facility 1 includes a sand basin 11, a first sedimentation basin 12, a reaction tank 13, a final sedimentation basin 14, and a chemical injection tank 15. The sedimentation basin 11 is equipment for precipitating and removing non-septic inorganic substances such as earth and sand in sewage, and the sewage from which the non-septic inorganic substances have been removed is supplied to the first sedimentation basin 12 by a sewage pump 16. The first settling basin 12 is a facility for removing sedimentary organic substances in the sewage by sedimentation by gently flowing the sewage. First, the supernatant water of the sedimentation tank 12 is supplied to the reaction tank 13. The sediment in the initial sedimentation basin 12 is collected by the sludge scraper 17a and supplied to the sludge treatment facility 2 as excess sludge by the sludge extraction pump 18.

反応槽13は、DO(溶存酸素濃度),MLSS(槽内の活性汚泥濃度),下水流量,ORP(酸化還元電位)等の指標に従って送風機19から反応槽13に供給される空気量を制御することによって、微生物を利用して下水中の有機物、窒素、リンを中心とする汚濁物質を処理する設備である。反応槽13に供給される空気量は圧力計20を利用して検出される。汚濁物質が除去された下水は最終沈殿池14に供給され、反応槽13内の沈殿物の一部は汚泥引き抜きポンプ18によって余剰汚泥として汚泥処理設備2に供給される。   The reaction tank 13 controls the amount of air supplied from the blower 19 to the reaction tank 13 according to indices such as DO (dissolved oxygen concentration), MLSS (active sludge concentration in the tank), sewage flow rate, ORP (oxidation reduction potential). This is a facility that uses microorganisms to treat pollutants, mainly organic matter, nitrogen and phosphorus in sewage. The amount of air supplied to the reaction tank 13 is detected using a pressure gauge 20. The sewage from which the pollutants are removed is supplied to the final sedimentation basin 14, and a part of the sediment in the reaction tank 13 is supplied to the sludge treatment facility 2 as excess sludge by the sludge extraction pump 18.

最終沈殿池14は、反応槽13から供給された下水を処理水と活性汚泥とに分離する設備である。処理水は薬注槽15に供給される。活性汚泥は、汚泥掻寄機17bによって集められ、反応槽13に返送又は汚泥引き抜きポンプ18によって余剰汚泥として汚泥処理設備2に供給される。薬注槽15は、薬注ポンプ21を利用して最終沈殿池14から供給された処理水に薬品を注入することによって処理水を消毒した後、消毒された処理水を河川等に放流する設備である。   The final sedimentation basin 14 is a facility that separates the sewage supplied from the reaction tank 13 into treated water and activated sludge. The treated water is supplied to the chemical injection tank 15. The activated sludge is collected by the sludge scraper 17b and returned to the reaction tank 13 or supplied to the sludge treatment facility 2 as excess sludge by the sludge extraction pump 18. The chemical injection tank 15 is a facility for disinfecting the treated water by injecting chemicals into the treated water supplied from the final sedimentation basin 14 using the chemical injection pump 21 and then discharging the disinfected treated water to a river or the like. It is.

汚泥処理設備2は、濃縮タンク31と、消化タンク32と、脱水機33と、焼却炉34と、を備えている。濃縮タンク31は、汚泥引き抜きポンプ18から供給された余剰汚泥中の水分を除去することによって余剰汚泥を濃縮する設備である。濃縮タンク31内で濃縮された余剰汚泥は、図示しない汚泥掻寄機によって集められ、消化タンク32に供給される。   The sludge treatment facility 2 includes a concentration tank 31, a digestion tank 32, a dehydrator 33, and an incinerator 34. The concentration tank 31 is a facility that concentrates excess sludge by removing moisture in the excess sludge supplied from the sludge extraction pump 18. Excess sludge concentrated in the concentration tank 31 is collected by a sludge scraper (not shown) and supplied to the digestion tank 32.

消化タンク32は、余剰汚泥内の有機物を分解して消化汚泥とする設備である。消化タンク32において生成された消化汚泥は脱水機33に供給される。脱水機33は、消化タンク32から供給された消化汚泥を脱水することによって消化汚泥の含水率を低下させる設備である。焼却炉34は、脱水機33によって含水率が低下した消化汚泥を焼却する設備である。   The digestion tank 32 is a facility for decomposing organic matter in excess sludge to obtain digested sludge. Digested sludge generated in the digestion tank 32 is supplied to a dehydrator 33. The dehydrator 33 is a facility that reduces the moisture content of the digested sludge by dehydrating the digested sludge supplied from the digestion tank 32. The incinerator 34 is a facility that incinerates digested sludge whose water content has been reduced by the dehydrator 33.

〔下水処理場の運転制御装置の構成〕
次に、図2を参照して、本発明の一実施形態である下水処理場の運転制御装置の構成について説明する。
[Configuration of sewage treatment plant operation control system]
Next, with reference to FIG. 2, the structure of the operation control apparatus of the sewage treatment plant which is one Embodiment of this invention is demonstrated.

図2は、本発明の一実施形態である下水処理場の運転制御装置の構成を示すブロック図である。図2に示すように、本発明の一実施形態である下水処理場の運転制御装置100は、パーソナルコンピュータ等のワークステーションや、プロセスコンピュータ等の情報処理装置によって構成されている。運転制御装置100は、情報処理装置内部のCPU等の演算処理装置がコンピュータプログラムを実行することによって、発電予測部101、需要予測部102、需給調整部103、及び需給制御部104として機能する。これら各部の機能については後述する。   FIG. 2 is a block diagram showing a configuration of an operation control device for a sewage treatment plant according to an embodiment of the present invention. As shown in FIG. 2, the operation control apparatus 100 of the sewage treatment plant which is one embodiment of the present invention is configured by a workstation such as a personal computer and an information processing apparatus such as a process computer. The operation control device 100 functions as a power generation prediction unit 101, a demand prediction unit 102, a supply and demand adjustment unit 103, and a supply and demand control unit 104 when an arithmetic processing device such as a CPU inside the information processing apparatus executes a computer program. The functions of these units will be described later.

運転制御装置100には、運転制御装置100に各種情報を入力するための入力装置110と、運転制御装置100からの各種情報を出力するための出力装置111が接続されている。また、運転制御装置100は、下水処理場に設けられている発電設備112及び発電設備112から供給される電力により動作する負荷設備113に接続されている。発電設備112としては、太陽光発電設備、太陽熱発電設備、風力発電設備、マイクロ水力発電設備、ガスエンジン発電設備、マイクロガスタービン発電設備、燃料電池、内燃機関、及び商用受電設備等を例示できる。負荷設備113としては、図1に示す汚水ポンプ16、汚泥掻寄機17a,17b、汚泥引き抜きポンプ18、送風機19、薬注ポンプ21、及び焼却炉34等を例示できる。   An input device 110 for inputting various information to the operation control device 100 and an output device 111 for outputting various information from the operation control device 100 are connected to the operation control device 100. In addition, the operation control device 100 is connected to a power generation facility 112 provided in a sewage treatment plant and a load facility 113 that operates with electric power supplied from the power generation facility 112. Examples of the power generation facility 112 include a solar power generation facility, a solar thermal power generation facility, a wind power generation facility, a micro hydropower generation facility, a gas engine power generation facility, a micro gas turbine power generation facility, a fuel cell, an internal combustion engine, and a commercial power receiving facility. Examples of the load facility 113 include the sewage pump 16, the sludge scrapers 17a and 17b, the sludge extraction pump 18, the blower 19, the chemical injection pump 21, and the incinerator 34 shown in FIG.

〔下水処理場の運転制御処理〕
このような構成を有する運転制御装置100は、以下に示す運転制御処理を実行することによって、図1に示す下水処理場全体の電力消費量やCO排出量を抑制する。以下、図3に示すフローチャートを参照して、この運転制御処理を実行する際の運転制御装置100の動作について説明する。
[Operation control processing of sewage treatment plant]
The operation control apparatus 100 having such a configuration suppresses the power consumption and CO 2 emission amount of the entire sewage treatment plant shown in FIG. 1 by executing the operation control process shown below. Hereinafter, the operation of the operation control apparatus 100 when executing the operation control process will be described with reference to a flowchart shown in FIG.

図3は、本発明の一実施形態である下水処理場の運転制御処理の流れを示すフローチャートである。図3に示すフローチャートは、所定の制御周期毎に開始され、運転制御処理はステップS1の処理に進む。   FIG. 3 is a flowchart showing a flow of operation control processing of the sewage treatment plant which is one embodiment of the present invention. The flowchart shown in FIG. 3 is started every predetermined control cycle, and the operation control process proceeds to the process of step S1.

ステップS1の処理では、運転制御装置100が、発電設備112及び負荷設備113の稼働状況に関する情報と下水流入量、水質、沈殿池の水位、天気、及び季節に関する情報を少なくとも含む電力需要及び需要量と電力供給力及び供給量との予測に関連性が強い情報とを実績データとして取得する。これにより、ステップS1の処理は完了し、運転制御処理はステップS2の処理に進む。   In the process of step S1, the operation control device 100 includes the power demand and the amount of demand including at least information on the operation status of the power generation facility 112 and the load facility 113 and information on the amount of sewage inflow, water quality, water level of the sedimentation basin, weather, and season. And information that is strongly related to the prediction of power supply capacity and supply amount is acquired as performance data. Thereby, the process of step S1 is completed and an operation control process progresses to the process of step S2.

ステップS2の処理では、発電予測部101及び需要予測部102がそれぞれ、ステップS1の処理において取得された実績データを用いて所定期間(例えば長期(1年〜1ヶ月)、中期(1週間〜1日)、短期(1時間以内〜数分))内における発電設備112の電力供給力及び供給量と負荷設備113の電力需要及び需要量とを予測する。具体的には、図4(a)に示すように現在の時間Tが時間T=T1である場合、需要予測部102は、図4(b)に示すように時間T=T1から時間T=24時までの電力需要及び需要量の変化を予測する。また、発電設備112が太陽光発電設備や太陽熱発電設備である場合、発電予測部101は、所定期間内における日射(日照)量予想から所定期間内における電力供給力及び供給量を予測する。また、発電設備112が風力発電設備である場合、発電予測部101は、所定期間内における風速予想から所定期間内における電力供給力及び供給量を予測する。また、発電設備112がマイクロ水力発電設備である場合、発電予測部101は、所定期間内における下水の流入/放水量から所定期間内における電力供給力及び供給量を予測する。また、発電設備112がガスエンジン発電設備、マイクロガスタービン発電設備、及び燃料電池である場合、発電予測部101は、所定期間内における燃料ガス(例えば消化ガス等)の備蓄量から所定期間内における電力供給力及び供給量を予測する。   In the process of step S2, the power generation prediction unit 101 and the demand prediction unit 102 each use the actual data acquired in the process of step S1, for a predetermined period (for example, long term (1 year to 1 month), medium term (1 week to 1). The power supply capacity and supply amount of the power generation facility 112 and the power demand and demand amount of the load facility 113 within a short period (within 1 hour to several minutes)) are predicted. Specifically, when the current time T is time T = T1 as shown in FIG. 4A, the demand prediction unit 102 determines from time T = T1 to time T = T as shown in FIG. 4B. Predict changes in power demand and demand up to 24:00. When the power generation facility 112 is a solar power generation facility or a solar thermal power generation facility, the power generation prediction unit 101 predicts the power supply capacity and the supply amount within a predetermined period from the amount of solar radiation (sunshine) within the predetermined period. When the power generation facility 112 is a wind power generation facility, the power generation prediction unit 101 predicts the power supply capacity and the supply amount within a predetermined period from the wind speed prediction within the predetermined period. When the power generation facility 112 is a micro hydropower generation facility, the power generation prediction unit 101 predicts the power supply capacity and the supply amount within a predetermined period from the inflow / discharge amount of sewage within the predetermined period. In addition, when the power generation facility 112 is a gas engine power generation facility, a micro gas turbine power generation facility, and a fuel cell, the power generation prediction unit 101 determines the amount of fuel gas (for example, digestion gas) within a predetermined period from the reserve amount. Predict power supply capacity and supply.

そして、発電予測部101及び需要予測部102はそれぞれ、発電設備112の電力供給力及び供給量と負荷設備113の電力需要及び需要量との予測結果に基づいて所定期間内における電力の供給計画及び需要計画を作成する。具体的には、発電予測部101は、予測された電力供給力及び供給量から最大限可能となる発電設備112の稼働計画(起動・停止・運転目標値設定)を電力の供給計画として作成する。また、需要予測部102は、予測された電力需要及び需要量から最大限必要になる負荷設備113の稼働計画(起動・停止・運転目標値設定)を需要計画として作成する。これにより、ステップS2の処理は完了し、運転制御処理はステップS3の処理に進む。   Then, the power generation prediction unit 101 and the demand prediction unit 102 respectively determine the power supply plan and power supply amount within the predetermined period based on the prediction results of the power supply capacity and supply amount of the power generation facility 112 and the power demand and demand amount of the load facility 113. Create a demand plan. Specifically, the power generation prediction unit 101 creates an operation plan (startup / stop / operation target value setting) of the power generation facility 112 that is maximally possible from the predicted power supply capacity and supply amount as a power supply plan. . Further, the demand prediction unit 102 creates, as a demand plan, an operation plan (start / stop / operation target value setting) of the load facility 113 required to the maximum from the predicted power demand and demand. Thereby, the process of step S2 is completed and the operation control process proceeds to the process of step S3.

ステップS3の処理では、需給調整部103が、ステップS2の処理によって作成された所定期間内における電力の供給計画及び需要計画に基づいて、下水処理場の電力消費量やCO排出量を抑制すると共に、電力供給コストの低減、機器稼動の高効率化、下水処理場のランニングコストの低減、及び発電設備112の効率的稼動による創エネルギーを実現ように所定期間内における電力の供給計画及び需要計画を調整する。換言すれば、需給調整部103は、効率、コスト、及びCO排出量が所定条件を満足することを条件として、電力需要及び需要量と電力供給力及び供給量とを調整することによって発電設備112及び負荷設備113の制御目標値を設定する。なお、効率、コスト、及びCO排出量の各要素について個別に制御目標値を設定してもよいし、各要素に重みを付けて複数の要素を同時に考慮した制御目標値を設定してもよい。具体的には、図4(c)に示すように、時間T=T2〜T3の間、負荷設備113の電力需要及び需要量が所定の供給予備力(電力需要の所定%)を考慮した発電設備112の電力供給力W1及び供給量を上回る場合、需給調整部103は、負荷設備113の電力需要及び需要量が所定の供給予備力を考慮した発電設備112の電力供給力W1及び供給量を下回る時間(例えば図4(d)に示す時間T=T3〜T4)に電力需要及び需要量の超過分をシフトさせたり、電力需要の超過分を削除したりする。 In the process of step S3, the supply and demand adjustment unit 103 suppresses the power consumption and CO 2 emission of the sewage treatment plant based on the power supply plan and the demand plan within the predetermined period created by the process of step S2. At the same time, power supply plans and demand plans within a predetermined period to reduce energy supply costs, increase equipment operation efficiency, reduce sewage treatment plant running costs, and realize energy creation through efficient operation of power generation facilities 112 Adjust. In other words, the supply and demand adjustment unit 103 adjusts the power demand, the demand amount, the power supply capacity, and the supply amount on the condition that the efficiency, the cost, and the CO 2 emission amount satisfy the predetermined conditions, thereby generating power facilities. 112 and control target values of the load facility 113 are set. Note that control target values may be set individually for each element of efficiency, cost, and CO 2 emission amount, or a control target value that considers a plurality of elements at the same time by weighting each element may be set. Good. Specifically, as shown in FIG. 4C, during time T = T2 to T3, the power demand and the demand amount of the load facility 113 consider the predetermined supply reserve capacity (predetermined% of power demand). When the power supply capacity W1 and the supply amount of the facility 112 exceed the power supply capacity W1 and the supply amount, the power supply and demand adjustment unit 103 determines the power supply capacity W1 and the supply amount of the power generation facility 112 in consideration of the predetermined supply reserve capacity. The excess of the power demand and the demand amount is shifted to a time less than that (for example, time T = T3 to T4 shown in FIG. 4D), or the excess of the power demand is deleted.

電力需要の超過分をシフトする方法としては、ポンプ等の稼働タイミングを先送りする方法と前倒しする方法とがある。稼働タイミングを先送りする場合、図5(a)に示すように、需給調整部103は、設備A(断面積S)が受け入れ可能な処理水の水位H(又は余剰汚泥の量)に基づいてポンプを停止できる時間Δtを算出し、算出された時間Δtだけポンプを停止するように需要計画を調整する。一方、稼働タイミングを前倒しする場合には、図5(b)に示すように、需給調整部103は、設備A内の処理水の水位H’(又は余剰汚泥の量)に基づいてポンプを追加稼働する時間Δt’を算出し、算出された時間Δt’だけポンプを追加稼働するように需要計画を調整する。パラメータF,F’は下水の流入量を示し、パラメータP,P’はポンプの吐出量を示している。電力需要の超過分を削除する方法としては、水質を規定値に保ちながら送風機19の稼働を停止する方法がある。   As a method of shifting the excess of the power demand, there are a method of delaying the operation timing of the pump and the like and a method of moving it forward. When the operation timing is postponed, as shown in FIG. 5A, the supply and demand adjustment unit 103 pumps based on the water level H (or the amount of excess sludge) of the treated water that can be received by the facility A (cross-sectional area S). Is calculated so as to stop the pump for the calculated time Δt. On the other hand, when the operation timing is advanced, as shown in FIG. 5B, the supply and demand adjustment unit 103 adds a pump based on the water level H ′ of the treated water in the facility A (or the amount of excess sludge). The operating time Δt ′ is calculated, and the demand plan is adjusted so that the pump is additionally operated for the calculated time Δt ′. Parameters F and F 'indicate the inflow of sewage, and parameters P and P' indicate the discharge amount of the pump. As a method of deleting excess power demand, there is a method of stopping the operation of the blower 19 while keeping the water quality at a specified value.

上述の例は、電力供給力及び供給量を固定して電力需要及び需要量を調整する内容のものであるが、電力需要及び需要量を固定して電力供給力及び供給量を調整するようにしてもよいし、電力需要及び需要量と電力供給力及び供給量との両方を調整するようにしてもよい。これにより、ステップS3の処理は完了し、運転制御処理はステップS3の処理に進む。   In the above example, the power supply capacity and supply amount are fixed and the power demand and demand amount are adjusted, but the power supply capacity and supply amount are fixed and the power supply capacity and supply amount are adjusted. Alternatively, both the power demand and the demand amount and the power supply capacity and the supply amount may be adjusted. Thereby, the process of step S3 is completed and an operation control process progresses to the process of step S3.

ステップS4の処理では、需給調整部103が、ステップS3の処理によって調整された所定期間内における電力の供給計画及び需要計画に基づいて発電設備112及び負荷設備113の調整・制御実行方法を決定する。これにより、ステップS4の処理は完了し、運転制御処理はステップS5の処理に進む。   In the process of step S4, the supply and demand adjustment unit 103 determines the adjustment / control execution method of the power generation facility 112 and the load facility 113 based on the power supply plan and the demand plan within the predetermined period adjusted by the process of step S3. . Thereby, the process of step S4 is completed and the operation control process proceeds to the process of step S5.

ステップS5の処理では、需給制御部104が、ステップS4の処理によって決定された発電設備112及び負荷設備113の調整・制御実行方法に従って発電設備112及び負荷設備113の動作を制御する。これにより、ステップS5の処理は完了し、一連の運転制御処理は終了する。   In the process of step S5, the supply and demand control unit 104 controls the operations of the power generation facility 112 and the load facility 113 according to the adjustment / control execution method for the power generation facility 112 and the load facility 113 determined by the process of step S4. Thereby, the process of step S5 is completed and a series of operation control processes are complete | finished.

以上の説明から明らかなように、本発明の一実施形態である下水処理場の運転制御処理では、発電予測部101が、所定期間内における発電設備112の稼働計画を作成し、需要予測部102が、所定期間内における負荷設備113の稼働計画を作成し、需給調整部103が、発電設備112の稼働計画と負荷設備113の稼働計画とに基づいて、電力需要量が電力供給量以下になるように発電設備112の稼働計画と負荷設備113の稼働計画との少なくとも一方を調整し、需給制御部104が、調整された稼働計画に基づいて発電設備112及び負荷設備113の動作を制御するので、下水処理場全体の電力消費量やCO排出量を抑制できる。 As is clear from the above description, in the operation control process of the sewage treatment plant that is one embodiment of the present invention, the power generation prediction unit 101 creates an operation plan of the power generation facility 112 within a predetermined period, and the demand prediction unit 102 However, the operation plan of the load facility 113 within a predetermined period is created, and the supply and demand adjustment unit 103 makes the power demand amount equal to or less than the power supply amount based on the operation plan of the power generation facility 112 and the operation plan of the load facility 113. As described above, at least one of the operation plan of the power generation facility 112 and the operation plan of the load facility 113 is adjusted, and the supply and demand control unit 104 controls the operation of the power generation facility 112 and the load facility 113 based on the adjusted operation plan. In addition, power consumption and CO 2 emissions of the entire sewage treatment plant can be suppressed.

以上、本発明者によってなされた発明を適用した実施の形態について説明したが、本実施形態による本発明の開示の一部をなす記述及び図面によって本発明は限定されることはない。例えば、本実施形態は、下水処理場内で稼働している機器類の消費電力や発電電力を予測/制御の対象としたが、BOD(Biochemical Oxygen Demand、生物化学的酸素要求量),COD(Chemical Oxygen Demand、化学的酸素要求量),アンモニア濃度,濁度等の水質、汚水の流入量、汚泥や消化ガスの生成量、消化ガス発電力量等を予測し、予測結果に基づいて下水処理場の運転制御を実施してもよい。また、電気の質(周波数と電圧)を維持するAFC(Automatic Frequency Control、自動周波数制御装置)やAVR(Automatic Voltage Regulator、自動電圧調整器)等の制御装置と連動することによって、水処理設備が商用の電力系統から自立した場合の運転制御にも対応できる。また、予測・制御の対象は、電力及び電力量に関係する要素に限られることはなく、水処理の水質、下水流入量等の下水処理場内の処理過程において実績情報として収集可能な情報を電力と同様にして予測し、その制御対象の設備や機器を制御してもよい。このように、本実施形態に基づいて当業者等によってなされる他の実施の形態、実施例、及び運用技術等は全て本発明の範疇に含まれる。   Although the embodiment to which the invention made by the present inventor is applied has been described above, the present invention is not limited by the description and the drawings that form part of the disclosure of the present invention according to this embodiment. For example, in the present embodiment, power consumption and generated power of devices operating in a sewage treatment plant are targeted for prediction / control, but BOD (Biochemical Oxygen Demand), COD (Chemical Oxygen Demand (chemical oxygen demand), ammonia concentration, water quality such as turbidity, sewage inflow, sludge and digestion gas production, digestion gas power generation, etc. Operation control may be performed. In addition, the water treatment facility can be operated in conjunction with control devices such as AFC (Automatic Frequency Control) and AVR (Automatic Voltage Regulator) that maintain the quality of electricity (frequency and voltage). It can also handle operation control when it is independent from a commercial power system. The target of prediction and control is not limited to elements related to electric power and electric energy, but information that can be collected as performance information in the treatment process in the sewage treatment plant such as water quality and sewage inflow amount It is also possible to make a prediction in the same manner as described above and control the equipment or equipment to be controlled. As described above, other embodiments, examples, operation techniques, and the like made by those skilled in the art based on the present embodiment are all included in the scope of the present invention.

1 下水処理設備
2 汚泥処理設備
11 沈砂池
12 最初沈殿池
13 反応槽
14 最終沈殿池
15 薬注槽
16 汚水ポンプ
17a,17b 汚泥掻寄機
18 汚泥引き抜きポンプ
19 送風機
20 圧力計
21 薬注ポンプ
31 濃縮タンク
32 消化タンク
33 脱水機
34 焼却炉
100 運転制御装置
101 発電予測部
102 需要予測部
103 需給調整部
104 需給制御部
110 入力装置
111 出力装置
112 発電設備
113 負荷設備
DESCRIPTION OF SYMBOLS 1 Sewage treatment equipment 2 Sludge treatment equipment 11 Sedimentation basin 12 Initial sedimentation basin 13 Reaction tank 14 Final sedimentation basin 15 Chemical injection tank 16 Sewage pump 17a, 17b Sludge scraping machine 18 Sludge extraction pump 19 Blower 20 Pressure gauge 21 Chemical injection pump 31 Concentration tank 32 Digestion tank 33 Dehydrator 34 Incinerator 100 Operation control device 101 Power generation prediction unit 102 Demand prediction unit 103 Supply / demand adjustment unit 104 Supply / demand control unit 110 Input device 111 Output device 112 Power generation facility 113 Load facility

Claims (7)

効率、コスト、及びCO排出量が所定条件を満足することを条件として、所定期間内における水処理設備の電力需要及び需要量と該所定期間内における該水処理設備に電力を供給する自家発電設備の電力供給力及び供給量とを調整し、自家発電設備の稼働計画と水処理設備の稼働計画とを作成する需給調整手段と、
前記需給調整手段によって調整された稼働計画に基づいて、前記自家発電設備及び水処理設備の動作を制御する需給制御手段と、
を備えることを特徴とする水処理設備の運転制御装置。
In-house power generation that supplies power to the water treatment facility within the predetermined period and the power demand and demand of the water treatment facility within the predetermined period on condition that the efficiency, cost, and CO 2 emission amount satisfy the predetermined conditions Supply and demand adjustment means for adjusting the power supply capacity and supply amount of the facility, and creating an operation plan for the private power generation facility and an operation plan for the water treatment facility,
Based on the operation plan adjusted by the supply and demand adjustment means, supply and demand control means for controlling the operation of the private power generation equipment and water treatment equipment,
An operation control device for water treatment equipment, comprising:
所定期間内における水処理設備の稼働計画を作成する電力需要予測手段と、
前記所定期間内における前記自家発電設備の稼働計画を作成する電力供給予測手段と、を備え、
前記需給調整手段は、前記電力供給予測手段によって作成された自家発電設備の稼働計画と前記電力需要予測手段によって作成された水処理設備の稼働計画とに基づいて、電力需要及び需要量が所定の供給予備力を考慮した電力供給力及び供給量を下回るように自家発電設備の稼働計画と水処理設備の稼働計画との少なくとも一方を調整する需給調整手段と、
前記需給制御手段は、前記需給調整手段によって調整された稼働計画に基づいて、自家発電設備及び水処理設備の動作を制御する
ことを特徴とする請求項1に記載の水処理設備の運転制御装置。
A power demand forecasting means for creating an operation plan of a water treatment facility within a predetermined period;
Power supply prediction means for creating an operation plan of the private power generation facility within the predetermined period,
The supply and demand adjustment means has a predetermined power demand and demand amount based on the operation plan of the private power generation facility created by the power supply prediction means and the operation plan of the water treatment facility created by the power demand prediction means. Supply and demand adjustment means for adjusting at least one of the operation plan of the private power generation facility and the operation plan of the water treatment facility so as to be lower than the power supply capacity and supply amount considering the supply reserve capacity,
The operation control apparatus for a water treatment facility according to claim 1, wherein the supply / demand control unit controls operations of the private power generation facility and the water treatment facility based on an operation plan adjusted by the supply / demand adjustment unit. .
前記需給調整手段は、電力供給力及び供給量からの電力需要及び需要量の超過分を電力需要及び需要量が電力供給力及び供給量未満である期間にシフトすることによって、電力需要及び需要量が所定の供給予備力を考慮した電力供給力及び供給量を下回るように調整することを特徴とする請求項2に記載の水処理設備の運転制御装置。   The supply and demand adjustment means shifts the power demand and the excess of the demand amount from the power supply capacity and supply amount to a period in which the power demand and demand amount is less than the power supply capacity and supply amount. The operation control device for water treatment equipment according to claim 2, wherein the power supply capacity and the supply amount are adjusted so as to be less than a predetermined supply reserve capacity. 前記需給調整手段は、電力供給力及び供給量からの電力需要及び需要量の超過分を削除することによって、電力需要及び需要量が所定の供給予備力を考慮した電力供給力及び供給量を下回るように調整することを特徴とする請求項2に記載の水処理設備の運転制御装置。   The supply and demand adjustment means deletes the power demand and the excess of the demand amount from the power supply capacity and the supply amount, so that the power demand and the demand amount fall below the power supply capacity and the supply amount considering a predetermined supply reserve capacity. It adjusts as follows, The operation control apparatus of the water treatment facility of Claim 2 characterized by the above-mentioned. 前記電力供給予測手段及び前記電力需要予測手段は、自家発電設備及び水処理設備の稼働状況に関する情報と電力需要及び需要量と電力供給力及び供給量との予測に関連性が強い情報とを用いて、自家発電設備及び水処理設備の稼働計画を作成することを特徴とする請求項2〜4のうち、いずれか1項に記載の水処理設備の運転制御装置。   The power supply prediction means and the power demand prediction means use information related to the operation status of private power generation facilities and water treatment facilities, and information that is highly relevant to prediction of power demand, demand amount, power supply capacity, and supply amount. The operation control device for a water treatment facility according to any one of claims 2 to 4, wherein an operation plan for the private power generation facility and the water treatment facility is created. 電力需要及び需要量と電力供給力及び供給量との予測に関連性が強い情報は、処理水の水質、処理水の貯水池の水位、天気、及び季節に関する情報を少なくとも含むことを特徴とする請求項5に記載の水処理設備の運転制御装置。   The information strongly related to the prediction of the power demand and the demand amount and the power supply capacity and the supply amount includes at least information on the quality of the treated water, the water level of the treated water reservoir, the weather, and the season. Item 6. A water treatment facility operation control device according to Item 5. 効率、コスト、及びCO排出量が所定条件を満足することを条件として、所定期間内における水処理設備の電力需要及び需要量と該所定期間内における該水処理設備に電力を供給する自家発電設備の電力供給力及び供給量とを調整し、自家発電設備の稼働計画と水処理設備の稼働計画とを作成する需給調整ステップと、
前記需給調整ステップにおいて調整された稼働計画に基づいて、前記自家発電設備及び水処理設備の動作を制御する需給制御ステップと、
を含むことを特徴とする水処理設備の運転制御方法。
In-house power generation that supplies power to the water treatment facility within the predetermined period and the power demand and demand of the water treatment facility within the predetermined period on condition that the efficiency, cost, and CO 2 emission amount satisfy the predetermined conditions Demand and supply adjustment step of adjusting the power supply capacity and supply amount of the facility, and creating an operation plan of the private power generation facility and an operation plan of the water treatment facility,
Based on the operation plan adjusted in the supply and demand adjustment step, a supply and demand control step for controlling operations of the private power generation facility and the water treatment facility,
The operation control method of the water treatment facility characterized by including.
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