Kabushiki Kaisha Toshiba

City of Kitakyushu

Katsuya Yokokawa

Ryo Namba

Futoshi Kurokawa

Takeshi Matsushiro

Hideaki Yamagata

Koichi Matsui

Seiichi Murayama

Atsushi Yukawa

Osamu Yamanaka

Hiroyuki Tokimoto

Yuka Hiraga

Toshiharu Sugino

Naoto Oishi

A pressure estimator, based on information acquired by an acquirer and model information that includes connection information of nodes in a water distribution pipeline network, estimates water pressure at at least one part of the nodes in the water distribution pipeline network. An extractor extracts a minimum water pressure value from a plurality of water pressures that include the water pressure estimated by the pressure estimator. A controller controls an adjustor to adjust at least one of a water pressure and a flow rate of water flowing into the water distribution pipeline network, based on a minimum water pressure value extracted by the extractor.

Leakage suppression apparatus, leakage suppression system, and leakage suppression program

According to one embodiment, a membrane filtration system includes a raw water tank, a pretreatment membrane module, a raw water feed line, a high-pressure RO membrane module, a high-pressure line, a preceding power recovery unit which pressurize the pretreated water by transmitting the pressure of the concentrate to the pretreated water, a succeeding power recovery unit which pressurize the raw water by transmitting a remaining pressure of the concentrate to the raw water, a concentrate discharge line, a first pressure transmission line communicating to the power recovery unit by being branched from the high-pressure line, a second pressure transmission line communicating to the power recovery unit by being branched from the raw water feed line, and a valve provided in the drain line to regulate a discharge of the concentrate from the power recovery unit in accordance with a pressure loss in the pretreatment membrane module.

Membrane filtration system

According to one embodiment, a seawater desalination apparatus includes a pressure sensor configured to measure a pressure of seawater which is supplied to a reverse osmosis membrane that is configured to separate seawater into fresh water and condensed seawater and to discharge the fresh water and the condensed seawater, a sensor configured to measure a flow amount of the fresh water which is discharged from the reverse osmosis membrane, a sensor configured to measure a flow amount of the condensed seawater discharged from the reverse osmosis membrane or a flow amount of the seawater discharged from a booster pump, a sensor configured to measure a flow amount of the seawater which is supplied to a power recovery device, and a controller configured to execute control based on values measured by the sensors.

Seawater desalination apparatus

According to one embodiment, a seawater desalination plant system includes a plant unit that produces fresh water from seawater. The seawater desalination plant system predicts quality of seawater for each predetermined time (for example, 1 hour) for a certain definite period (for example, 24 hours) based on a past actual measurement value of quality of seawater; creates a plurality of proposed plans of fresh water production quantity during the definite period in each of which fresh water production quantity required for the definite period is allotted to the each predetermined time; calculates, with respect to the proposed plans, electric power consumption rates for desalination using the predicted quality of seawater, the fresh water production quantity and a previously obtained recovery rate; and obtains an optimum plan of fresh water production quantity with a minimum electric power consumption rate from the proposed plans.

Seawater desalination plant system

According to one embodiment, a apparatus includes a controller configured to obtain values measured by a first sensor and a second sensor, receive pH target values at the entrance of a first reverse osmosis membrane and at the entrance of a second reverse osmosis membrane, and use a transfer function from the acid injection to pH at the entrance of the first reverse osmosis membrane, a transfer function from the alkaline injection to pH at the entrance of the first reverse osmosis membrane, a transfer function from the acid injection to pH at the entrance of the second reverse osmosis membrane, and a transfer function from the alkaline injection to pH at the entrance of the second reverse osmosis membrane, to control an injection rate of the acid injected from a first injection device and an injection rate of the alkali injected from a second injection device.

Seawater desalination apparatus and chemical injection apparatus

A water leakage monitoring system including a water leakage position estimator which includes a periodic data acquiring unit for fetching predetermined-period flow rate pressure data stored in a monitoring device, and for fetching a signal related to a flow rate change and pressure changes expecting a water leakage reaction time calculating unit for calculating a pressure reaction time lag between two pressure changes, a pressure propagation velocity estimating unit for estimating a pressure propagation velocity using the pressure reaction time lag and a distance between two pressure gauges located in a water distribution block stored in a pipeline network map data, and a flow rate change position estimating unit for receiving a signal related to the flow rate change, and estimating a flow rate change position using pressure propagation velocity and a flow meter and pressure gauge locating positions of the pipeline network map data.

Growing community of inventors

Fuchu, Japan

Katsuya Yokokawa