JP2013034925A5

JP2013034925A5 -

Info

Publication number: JP2013034925A5
Application number: JP2011171624A
Authority: JP
Filing date: 2011-08-05
Publication date: 2013-11-21
Anticipated expiration: 2031-08-05

Description

本発明は、原水から前処理水を製造する前処理部と、前処理水から透過水を製造する膜分離部と、を含み、前記前処理部は、原水が供給される少なくとも一つの前処理ユニットと、入力された第１駆動周波数に応じた回転速度で駆動され、原水を前記前処理ユニットに向けて供給する原水ポンプと、入力された演算値信号に対応する第１駆動周波数を前記原水ポンプに出力する第１インバータと、前処理水の圧力を検出する圧力検出手段と、前記圧力検出手段の検出圧力値が予め設定された目標圧力値となるように、前記原水ポンプの第１駆動周波数を演算し、当該第１駆動周波数の演算値に対応する演算値信号を前記第１インバータに出力する第１制御部と、を備え、前記膜分離部は、供給された前処理水を透過水と濃縮水とに分離する逆浸透膜モジュールと、入力された第２駆動周波数に応じた回転速度で駆動され、前処理水を前記逆浸透膜モジュールに向けて供給する加圧ポンプと、入力された演算値信号に対応する第２駆動周波数を前記加圧ポンプに出力する第２インバータと、透過水の流量を検出する流量検出手段と、前記流量検出手段の検出流量値が予め設定された目標流量値となるように、前記加圧ポンプの第２駆動周波数を演算し、当該第２駆動周波数の演算値に対応する演算値信号を前記第２インバータに出力する第２制御部と、を備える水処理システムに関する。 The present invention includes a pretreatment unit that produces pretreatment water from raw water, and a membrane separation unit that produces permeate from pretreatment water, wherein the pretreatment unit is at least one pretreatment to which raw water is supplied. A raw water pump that is driven at a rotational speed corresponding to the input first driving frequency and supplies raw water to the pretreatment unit; and a first driving frequency corresponding to the input calculation value signal is the raw water. A first inverter that outputs to the pump; a pressure detection means that detects the pressure of the pretreatment water; and a first drive of the raw water pump so that the detected pressure value of the pressure detection means becomes a preset target pressure value. A first control unit that calculates a frequency and outputs a calculated value signal corresponding to a calculated value of the first driving frequency to the first inverter, and the membrane separation unit permeates the supplied pretreated water. Reverse to separate water and concentrated water And semipermeable membrane module is driven at a rotation speed corresponding to the second driving frequency input, and a pressure pump for supplying the pre-treated water toward the reverse osmosis membrane module, a corresponding input operation value signal A second inverter that outputs two driving frequencies to the pressurizing pump, a flow rate detecting means for detecting a flow rate of permeated water, and the detected flow rate value of the flow rate detecting means so as to become a preset target flow rate value. The present invention relates to a water treatment system comprising: a second control unit that calculates a second drive frequency of a pressure pump and outputs a calculated value signal corresponding to a calculated value of the second drive frequency to the second inverter.

Claims

Including a pretreatment unit for producing pretreatment water from raw water, and a membrane separation unit for producing permeate from pretreatment water,
The pretreatment unit includes at least one pretreatment unit to which raw water is supplied;
A raw water pump that is driven at a rotational speed corresponding to the input first driving frequency and supplies raw water to the pretreatment unit;
A first inverter that outputs to the raw water pump a first drive frequency corresponding to the input operation value signal ;
Pressure detecting means for detecting the pressure of the pretreated water;
The first driving frequency of the raw water pump is calculated so that the detected pressure value of the pressure detecting means becomes a preset target pressure value, and the calculated value signal corresponding to the calculated value of the first driving frequency is calculated. A first control unit that outputs to one inverter,
The membrane separation unit is a reverse osmosis membrane module that separates the supplied pretreatment water into permeate and concentrated water;
A pressure pump that is driven at a rotational speed corresponding to the input second driving frequency and supplies pretreated water toward the reverse osmosis membrane module;
A second inverter that outputs a second drive frequency corresponding to the inputted calculation value signal to the pressurizing pump;
Flow rate detection means for detecting the flow rate of the permeated water,
The second drive frequency of the pressurizing pump is calculated so that the detected flow rate value of the flow rate detecting means becomes a preset target flow rate value, and the calculated value signal corresponding to the calculated value of the second drive frequency is calculated. A second controller that outputs to the second inverter;
A water treatment system comprising.

The pre-processing unit includes an information transmission unit that transmits information to the outside.
When the first control unit outputs the first drive frequency from the first inverter to the raw water pump, the detected pressure value of the pressure detecting means has a pressure range corresponding to a preset first drive frequency. In the case of detachment, the information transmission unit is controlled to transmit information indicating abnormality to the outside.
The water treatment system according to claim 1.