公开(公告)号：US10041924B2

公开(公告)日：2018-08-07

申请号：US15304762

申请日：2015-04-01

Applicant: KURITA WATER INDUSTRIES LTD.

Inventor： Shintarou Mori ,  Yukimasa Shimura

IPC: G01N33/18 ,  G01N21/59 ,  G01N27/06

CPC classification number: G01N33/1853 ,  G01N21/59 ,  G01N27/06 ,  G01N33/182

Abstract: Provided are a concentration-factor measurement device and method for accurately calculating a concentration factor of circulating water, and a method for measuring a water-quality index value of the circulating water. The concentration-factor measurement device includes a light-absorbance measurement unit (1) for measuring absorbance by irradiating each of cells (12A-12C) with light, and an electrode measurement unit (2) equipped with electrodes (16, 17) that are inserted into a water sample in a container (20). For each item of water quality, the device calculates a concentration factor on the basis of a measured value measured when the water sample (W) is the circulating water, and a measured value measured when the water sample (W) is makeup water. A plurality of concentration factors are calculated on the basis of the measured values for plural items of water quality. Hence an accurate concentration factor can be obtained.

公开(公告)号：USD728399S1

公开(公告)日：2015-05-05

申请号：US29478601

申请日：2014-01-07

Applicant: DKK-TOA Corporation ,  Kurita Water Industries Ltd.

Designer： Satoshi Takizawa ,  Tetsuya Sato ,  Shuji Sugawara ,  Yuko Konno ,  Shintarou Mori ,  Yukimasa Shimura

公开(公告)号：US10384966B2

公开(公告)日：2019-08-20

申请号：US15115493

申请日：2015-01-26

Applicant: KURITA WATER INDUSTRIES LTD.

Inventor： Mizuyuki Sakai ,  Yukimasa Shimura

IPC: C11D3/37 ,  C11D7/26 ,  C02F5/10 ,  C11D3/20 ,  B08B3/04 ,  B08B3/02 ,  F22B37/52 ,  C11D11/00 ,  C08F120/06 ,  C08L33/02 ,  C23F14/02

Abstract: Provided are a method for removing scale and a scale remover that can efficiently remove scale deposited inside a boiler can or the like in an addition amount of chemicals permissible in terms of cost without corroding a boiler, particularly can efficiently remove scale deposited inside a boiler can even in a facility operated with feed water containing high-concentration iron. A method for removing scale deposited in a system of a steam generating facility, wherein polyacrylic acid having a weight-average molecular weight of more than 20,000 and 170,000 or less and/or a salt thereof is added to feed water of the steam generating facility. When the feed water contains iron, polymethacrylic acid having a weight-average molecular weight of more than 1,000 and 100,000 or less and/or a salt thereof is further added in combination.

公开(公告)号：US09834462B2

公开(公告)日：2017-12-05

申请号：US14780794

申请日：2014-03-27

Applicant: KURITA WATER INDUSTRIES LTD.

Inventor： Mizuyuki Sakai ,  Yukimasa Shimura

IPC: C02F1/00 ,  C02F5/08 ,  C02F5/10 ,  C02F1/68 ,  F22B37/52 ,  C11D3/37 ,  C11D11/00 ,  C23F11/173 ,  C23F14/02 ,  C02F1/66

CPC classification number: C02F5/10 ,  C02F1/66 ,  C02F1/68 ,  C02F2303/14 ,  C02F2303/22 ,  C02F2307/00 ,  C11D3/3757 ,  C11D11/0041 ,  C23F11/173 ,  C23F14/02 ,  F22B37/52

Abstract: Provided is a method for removing a scale in a steam generation facility, whereby it becomes possible to remove a scale deposited on the inside of a boiler vessel during the operation of a boiler without causing corrosion of the boiler. A method for removing a scale in a steam generation facility is disclosed, wherein in the steam generation facility, a pH of boiler water is adjusted to 11.3 or more, and a polyacrylic acid having a weight average molecular weight that is 0.50 to 2.00 times a reference weight average molecular weight as calculated from the following calculation formula (1), or a salt thereof, is added in accordance with the pH value of the boiler water during the operation of a boiler, thereby removing a scale deposited on the inside of a boiler vessel: Reference weight average molecular weight=−8462×{(pH value)−11.3}+61538  (1).

公开(公告)号：US10179743B2

公开(公告)日：2019-01-15

申请号：US15115463

申请日：2015-02-23

Applicant: KURITA WATER INDUSTRIES LTD.

Inventor： Chikako Shimpo ,  Yukimasa Shimura

IPC: C02F1/68 ,  F22B37/02 ,  C02F1/00

Abstract: A device for controlling injection of chemical into a boiler and a chemical injection method can control an injection amount such that a chemical concentration is obtained as per a target even in a boiler feed-water facility where a flow rate of feed-water varies to a large extent in a short period. The device controls an amount discharged by a chemical injection pump in proportion to a flow rate measured by a flowmeter. An average chemical concentration in a feed-water is calculated from an amount of feed-water per predetermined period obtained by the flowmeter and a reduction in the amount of chemical in a tank per predetermined period obtained by a sensor. The chemical injection pump is controlled on the basis of the calculated average chemical concentration and a preset target chemical concentration of the feed-water so that the average chemical concentration is within the target chemical concentration range.

公开(公告)号：US09791427B2

公开(公告)日：2017-10-17

申请号：US15038791

申请日：2014-12-02

Applicant: KURITA WATER INDUSTRIES LTD.

Inventor： Shintarou Mori ,  Yukimasa Shimura

IPC: G01N33/18 ,  C02F1/00 ,  G01N21/31 ,  G01N21/25 ,  G01N21/79 ,  G01N33/44 ,  G01N21/78 ,  G01N21/75 ,  C02F103/02

CPC classification number: G01N33/18 ,  C02F1/008 ,  C02F2103/023 ,  C02F2209/001 ,  C02F2209/006 ,  C02F2209/008 ,  G01N21/255 ,  G01N21/31 ,  G01N21/78 ,  G01N21/79 ,  G01N31/22 ,  G01N33/1826 ,  G01N33/442 ,  G01N2201/12723

Abstract: A system for calculating a concentration of a water treatment chemical includes a water analyzer, databases storing information regarding a chemical component of the water treatment chemical, a server sending the information stored in the database, and a communication device sending the information acquired from the server to the water analyzer. The water analyzer includes a storage unit storing a calibration curve defining the relationship between the concentration of a chemical component and absorbance, a communication unit receiving the information regarding the chemical component of the water treatment chemical, an irradiation unit irradiating water to be analyzed with light, a detection unit detecting transmitted light, and an arithmetic and control unit calculating absorbance from the result of the detection by the detection unit, acquiring a calibration curve from the storage unit, and calculating the concentration of the chemical component with reference to the acquired calibration curve and the measured absorbance.

公开(公告)号：US10703659B2

公开(公告)日：2020-07-07

申请号：US15935850

申请日：2018-03-26

Applicant: KURITA WATER INDUSTRIES LTD.

Inventor： Mizuyuki Sakai ,  Yukimasa Shimura

IPC: C11D3/37 ,  C11D7/26 ,  C02F5/10 ,  C11D3/20 ,  B08B3/04 ,  B08B3/02 ,  F22B37/52 ,  C08F120/06 ,  C08L33/02 ,  C23F14/02 ,  C11D11/00

Abstract: A scale remover that efficiently removes scale deposited inside a boiler without corroding a boiler includes polyacrylic acid and polymethacrylic acid and/or salts thereof.