JPH0352696A - Method for controlling operation of blower for aeration - Google Patents
Method for controlling operation of blower for aerationInfo
- Publication number
- JPH0352696A JPH0352696A JP1187035A JP18703589A JPH0352696A JP H0352696 A JPH0352696 A JP H0352696A JP 1187035 A JP1187035 A JP 1187035A JP 18703589 A JP18703589 A JP 18703589A JP H0352696 A JPH0352696 A JP H0352696A
- Authority
- JP
- Japan
- Prior art keywords
- value
- lower limit
- blower
- blowers
- sensor
- 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.)
- Pending
Links
- 238000005273 aeration Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052760 oxygen Inorganic materials 0.000 abstract description 2
- 239000001301 oxygen Substances 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000004659 sterilization and disinfection Methods 0.000 description 3
- 238000010009 beating Methods 0.000 description 2
- 238000011017 operating method Methods 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
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
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Activated Sludge Processes (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、ばっ気式浄化槽に使用するばっ気用ブロワの
運転制御方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for controlling the operation of an aeration blower used in an aeration type septic tank.
（従来の技術）
従来、ばっ気槽の過ばっ気によるｐＨ低下によって水質
の悪化するのを防止するため、あるいは省エネルギーの
観点から、ばっ気槽にＤＯセンサを取付け、その検出Ｄ
Ｏ値に比例してインバータによりブロワの回転数を制御
する方法があった。(Prior art) Conventionally, in order to prevent the water quality from deteriorating due to a drop in pH due to overaeration in the aeration tank, or from the viewpoint of energy conservation, a DO sensor was attached to the aeration tank, and its detection D
There is a method of controlling the rotation speed of the blower using an inverter in proportion to the O value.
《発明が解決しようとする課題｝
ところで、ばっ気槽内のＤＯ（溶存酸素）値は、第２図
に示すように、流入負荷の変動によって細かくふらつい
ている。このため、従来のようなＤＯ値に比例した制御
では、このふらつきによってインバータやブロワに「う
なり」等の現象が発生し、機械的な寿命を短くする原因
となっていた。<<Problems to be Solved by the Invention>> Incidentally, as shown in FIG. 2, the DO (dissolved oxygen) value in the aeration tank fluctuates finely due to fluctuations in the inflow load. For this reason, in conventional control proportional to the DO value, this fluctuation causes phenomena such as "beating" in the inverter or blower, which shortens the mechanical life of the inverter or blower.
また、インバータとＤＯセンサを繋ぐ演算器は高価であ
り、取扱いも困難であるため、専任の管理者が特別に必
要とされていた。Furthermore, the computing unit that connects the inverter and the DO sensor is expensive and difficult to handle, so a special administrator is required.
上記問題に鑑み、本発明は、ばっ気槽内のＤＯ値のふら
つきによるインバータ等のうなり現象をなくし、かつ専
任の管理者を不要にするばっ気用ブロワの運転制御方法
を提供しようとするものである。In view of the above problems, the present invention aims to provide a method for controlling the operation of an aeration blower, which eliminates the humming phenomenon of the inverter, etc. due to fluctuations in the DO value in the aeration tank, and eliminates the need for a dedicated manager. It is.
《課題を解決するための手段〉
これらの問題点を解決するために、本発明において採用
された手段を、第１図に示す実施例の符号を用いて説明
する。<<Means for Solving the Problems>> Means adopted in the present invention to solve these problems will be explained using the reference numerals of the embodiment shown in FIG.
第１図は本発明を表わすシステムの概略図である。ばっ
気槽１内のＤＯ値は、上・下限警報装置付ＤＯセンサ２
により測定され、ＤＯセンサ本体３に送られる。ここで
、ＤＯ値がＤＯセンサ本体３に予め設定された上限値お
よび下限値の間にある場合は、インバータ４はブロワ（
ブロワモータ）５をある一定の回転数で制御する。しか
し、ＤＯ値が上限値を越えている場合は、ＤＯセンサ本
体３より上限警報信号が出力されるため、インバータ４
はこの信号を感知してブロワ５の回転数を低下させる。FIG. 1 is a schematic diagram of a system representing the invention. The DO value in the aeration tank 1 is determined by a DO sensor 2 with an upper/lower limit alarm device.
is measured and sent to the DO sensor main body 3. Here, if the DO value is between the upper limit and lower limit set in advance in the DO sensor main body 3, the inverter 4 operates as a blower (
The blower motor) 5 is controlled at a certain rotation speed. However, if the DO value exceeds the upper limit, an upper limit alarm signal is output from the DO sensor body 3, so the inverter 4
detects this signal and reduces the rotation speed of the blower 5.
これによって、ばっ気量は減少し、ＤＯ値は上限値を下
回るようになる。As a result, the amount of aeration decreases and the DO value falls below the upper limit.
これとは逆に、ＤＯ値が下限値を下回った場合は、下限
警報か出力され、インバータ４はブロワ５の回転数を上
昇させるため、ばっ気量が増加し、下限値を上回る。On the contrary, if the DO value falls below the lower limit, a lower limit alarm is output and the inverter 4 increases the rotation speed of the blower 5, so that the aeration amount increases and exceeds the lower limit.
このように、本発明におけるブロワの運転制御方法にあ
っては、上・下限警報装置付ＤＯセンサによる上限値と
下限値の間にＤＯ値を調整するために、インバータ４が
ブロワの回転数を低・中・高速の３段階に制御すること
を特徴とする。As described above, in the blower operation control method of the present invention, in order to adjust the DO value between the upper limit value and the lower limit value determined by the DO sensor with upper/lower limit alarm device, the inverter 4 controls the rotation speed of the blower. It is characterized by three levels of control: low, medium, and high speed.
したがって、ブロワ５が３段階に制御され、上・下限値
の所定範囲内にばっ気槽のＤＯ値が収まるので、流入負
荷が変動してもＤＯ値が細かくふらつくようなことがな
い。その結果、インバータ４やブロワ５に「うなり」等
の現象が発生することがなくなる。Therefore, the blower 5 is controlled in three stages, and the DO value of the aeration tank is kept within a predetermined range of upper and lower limit values, so that the DO value does not fluctuate minutely even if the inflow load fluctuates. As a result, phenomena such as "beating" will not occur in the inverter 4 or the blower 5.
（実施例）
以下、本発門の一実施例を第１図を参照しながら詳しく
説明する。(Example) Hereinafter, an example of the present invention will be described in detail with reference to FIG.
昭和５５年建設省告示第１２９２号では、「ばっ気槽内
のＤＯ値は、おおむねｌｐｐｍに保持すること」となっ
ている。このため、本実施例では余裕をみて、上・下限
警報装置付ＤＯセンサ本体３の上限値を４ｐｐｍ，下限
値を２ｐｐｍと設定した。また、これに対応するインバ
ータ４の出力周波数の設定値を、ブロワ５のモータ回転
数を低・中・高速回転の３段階に運転できるようにした
。According to the Ministry of Construction Notification No. 1292 of 1981, ``the DO value in the aeration tank must be maintained at approximately lppm.'' Therefore, in this embodiment, the upper limit value of the DO sensor main body 3 with upper/lower limit warning device was set to 4 ppm and the lower limit value was set to 2 ppm, taking into consideration a margin. In addition, the setting value of the output frequency of the inverter 4 corresponding to this allows the motor rotation speed of the blower 5 to be operated in three stages: low, medium, and high speed rotation.
すなわち、この出力周波数は、ばっ気槽１内のＤＯ値が
」二限値を越えている場合は３０Ｈｚ，上限値と下限値
の間にある場合は４０Ｈｚ，下限値を下回っている場合
は５０Ｈｚとした。That is, this output frequency is 30Hz when the DO value in the aeration tank 1 exceeds the second limit, 40Hz when it is between the upper and lower limits, and 50Hz when it is below the lower limit. And so.
ここにばっ気槽１の有効容量は４８．５７ｍ３である。Here, the effective capacity of the aeration tank 1 is 48.57 m3.
また、図中符号６は、流量調整槽，符号７は沈ｊＢ槽，
符号８は消毒槽である。これらばっ気槽１，流量調整槽
６，沈澱槽７および消毒槽８にて構成される合併処理浄
化槽は、日平均汚水量６０ｍ３／日であって、放流水質
ＢＯＤ２０ｐｐｍ以下の処理能力をもつ浄化槽である。Further, in the figure, numeral 6 is a flow rate adjustment tank, numeral 7 is a sinking jB tank,
Reference numeral 8 is a disinfection tank. The combined treatment septic tank consisting of the aeration tank 1, flow rate adjustment tank 6, sedimentation tank 7, and disinfection tank 8 is a septic tank with a processing capacity of 60 m3/day of average sewage volume and effluent water quality BOD of 20 ppm or less. be.
さらに、ばっ気槽１に空気を供給するためのブロワ５の
出力は３．７ＫＷである。Furthermore, the output of the blower 5 for supplying air to the aeration tank 1 is 3.7 KW.
表は本実施例による水質処理性能を示したものである。The table shows the water quality treatment performance of this example.
この表から明らかなように、本発明により制御を行った
場合の放流水のＢＯＤは、制御しなかった場合と比較し
て、同等以上であり、かつ省エネルギー効率も４５％あ
った。As is clear from this table, the BOD of the discharged water when controlled according to the present invention was equal to or higher than when it was not controlled, and the energy saving efficiency was also 45%.
（発明の効果）
以」二述べたように、本発明は実施例からも明らかな如
く、次の効果を有する。(Effects of the Invention) As described above, the present invention has the following effects as is clear from the examples.
１．ばっ気用ブロワのばっ気能力は、浄化槽の最大処理
能力に見合うように設計してあり、また、流入負荷の変
動にかかわらず常に一定の運転を行っていたが、本発明
による運転方法では、ＤＯ値が所定範囲に収まるようブ
ロワ回転数が低・中・高速に制御されるので、従来方法
に比べて十分な省エネルギー効果が得られる。1. The aeration capacity of the aeration blower was designed to match the maximum processing capacity of the septic tank, and the aeration blower was always operated at a constant level regardless of fluctuations in the inflow load, but with the operating method of the present invention, Since the blower rotation speed is controlled at low, medium, and high speeds so that the DO value falls within a predetermined range, a sufficient energy saving effect can be obtained compared to the conventional method.
２．本発明によるブロワの運転方法は３段階制御である
ため、ばっ気槽内のＤＯの細かいふらつきによってイン
バータやブロワの運転が影響されず、従来のようなうな
り現象は解消し、機械的寿命が長くなる。2. Since the blower operating method according to the present invention is a three-stage control, the operation of the inverter and blower is not affected by small fluctuations in the DO in the aeration tank, eliminating the conventional whirring phenomenon and extending the mechanical life. Become.
３．上・下限警報装置付ＤＯセンサは演算器に比べて安
価で信頼性の高いものが多いため、コスト面および性能
面でも有利になる。3. DO sensors with upper/lower limit warning devices are often cheaper and more reliable than arithmetic units, so they are advantageous in terms of cost and performance.
４．上記ＤＯセンサの取扱いは誰でも簡単にできるため
、専任の管理者を必要としない。つまり、本発明におい
ては、演算器等の複雑なものは一切使用していないため
、誰にでも維持管理が可能である。4. Anyone can easily handle the above-mentioned DO sensor, so there is no need for a dedicated administrator. In other words, the present invention does not use any complicated components such as arithmetic units, so anyone can maintain and manage the system.
第１図は本允門方法で使用されるブロワの迂転制御装置
を示す概略システム図、第２図はばつ気槽内におけるＤ
Ｏ値の経時変化を表わす特性図である。
１・・・ばっ気槽
２・・・ＤＯセンサ
３・・・上・下限警報装置付ＤＯセンサ本体４・・・イ
ンバータ
５・・・ブロワ
６・・・流量調整｛曹
７・・・沈澱槽
８・・・消毒槽Figure 1 is a schematic system diagram showing the blower detour control device used in the present Yumen method, and Figure 2 is a diagram showing the D in the aeration tank.
FIG. 3 is a characteristic diagram showing changes in O value over time. 1... Aeration tank 2... DO sensor 3... DO sensor body with upper/lower limit alarm device 4... Inverter 5... Blower 6... Flow rate adjustment {Soda 7... Sedimentation tank 8... Disinfection tank
Claims (1)
運転制御方法において、ばっ気槽内に取付けた上・下限
警報装置付ＤＯセンサを利用して、ＤＯ値を前記ＤＯセ
ンサによる上限値と下限値の間に収めるために、ブロワ
をインバータにより低・中・高速回転の３段階に制御す
ることを特徴とするばっ気用ブロワの運転制御方法。1. In a method for controlling the operation of an aeration blower for supplying air to an aeration tank, a DO sensor with an upper/lower limit alarm device installed in the aeration tank is used to set the DO value to the upper limit determined by the DO sensor. A method for controlling the operation of an aeration blower, characterized in that the blower is controlled in three stages of low, medium, and high speed rotation using an inverter in order to keep the rotation between the above and the lower limit values.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1187035A JPH0352696A (en) | 1989-07-19 | 1989-07-19 | Method for controlling operation of blower for aeration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1187035A JPH0352696A (en) | 1989-07-19 | 1989-07-19 | Method for controlling operation of blower for aeration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0352696A true JPH0352696A (en) | 1991-03-06 |
Family
ID=16199039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1187035A Pending JPH0352696A (en) | 1989-07-19 | 1989-07-19 | Method for controlling operation of blower for aeration |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0352696A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05161898A (en) * | 1991-12-13 | 1993-06-29 | Nippon Kentetsu Co Ltd | Dissolved oxygen control apparatus for waste water treating apparatus |
| US6200469B1 (en) * | 1997-06-23 | 2001-03-13 | North American Wetland Engineering | System for removing pollutants from water |
| JP2002320990A (en) * | 2001-04-26 | 2002-11-05 | Hitachi Kiden Kogyo Ltd | Automatic operation control method for aerator |
| US6652743B2 (en) | 1997-06-23 | 2003-11-25 | North American Wetland Engineering, Inc. | System and method for removing pollutants from water |
| US7455775B2 (en) | 2005-11-10 | 2008-11-25 | Fuji Clean Co., Ltd. | Water treatment method and apparatus |
| US7874546B2 (en) * | 2007-08-22 | 2011-01-25 | Jong Hoo Park | Integrated nano-bubble generating apparatus |
| US7879246B2 (en) | 2005-02-09 | 2011-02-01 | Fuji Clean Co., Ltd | Water treatment apparatus |
| JP2013078732A (en) * | 2011-10-04 | 2013-05-02 | Kubota Kankyo Service Kk | Operation method, operation control device, and control method for sewage plant |
| CN104817195A (en) * | 2015-04-08 | 2015-08-05 | 浙江大学 | Low-energy consumption sewage aeration system capable of supplying oxygen by phases and partition |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50141887A (en) * | 1974-05-01 | 1975-11-14 | ||
| JPS53123830A (en) * | 1977-04-05 | 1978-10-28 | Mitsubishi Electric Corp | Control system by current type inverter driver induction motors |
-
1989
- 1989-07-19 JP JP1187035A patent/JPH0352696A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50141887A (en) * | 1974-05-01 | 1975-11-14 | ||
| JPS53123830A (en) * | 1977-04-05 | 1978-10-28 | Mitsubishi Electric Corp | Control system by current type inverter driver induction motors |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05161898A (en) * | 1991-12-13 | 1993-06-29 | Nippon Kentetsu Co Ltd | Dissolved oxygen control apparatus for waste water treating apparatus |
| US6200469B1 (en) * | 1997-06-23 | 2001-03-13 | North American Wetland Engineering | System for removing pollutants from water |
| US6406627B1 (en) | 1997-06-23 | 2002-06-18 | North American Wetland Engineering, Inc. | Method for removing pollutants from water |
| US6652743B2 (en) | 1997-06-23 | 2003-11-25 | North American Wetland Engineering, Inc. | System and method for removing pollutants from water |
| JP2002320990A (en) * | 2001-04-26 | 2002-11-05 | Hitachi Kiden Kogyo Ltd | Automatic operation control method for aerator |
| US7879246B2 (en) | 2005-02-09 | 2011-02-01 | Fuji Clean Co., Ltd | Water treatment apparatus |
| US7455775B2 (en) | 2005-11-10 | 2008-11-25 | Fuji Clean Co., Ltd. | Water treatment method and apparatus |
| US7622042B2 (en) | 2005-11-10 | 2009-11-24 | Fuji Clean Co., Ltd. | Water treatment apparatus and method |
| US7874546B2 (en) * | 2007-08-22 | 2011-01-25 | Jong Hoo Park | Integrated nano-bubble generating apparatus |
| JP2013078732A (en) * | 2011-10-04 | 2013-05-02 | Kubota Kankyo Service Kk | Operation method, operation control device, and control method for sewage plant |
| CN104817195A (en) * | 2015-04-08 | 2015-08-05 | 浙江大学 | Low-energy consumption sewage aeration system capable of supplying oxygen by phases and partition |
| CN104817195B (en) * | 2015-04-08 | 2019-11-22 | 浙江大学 | The low energy consumption sewage aeration system of subregion oxygen supply stage by stage |
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