公开(公告)号：US20170008784A1

公开(公告)日：2017-01-12

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

CPC classification number: C02F1/686 ,  C02F1/008 ,  C02F2209/005 ,  C02F2209/006 ,  C02F2209/02 ,  C02F2209/05 ,  C02F2209/40 ,  F22B37/025

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.

Abstract translation: 用于控制将化学品注入锅炉的装置和化学喷射方法可以控制喷射量，使得即使在供水流量变化到一个锅炉给水设备的锅炉给水设备中也可以根据目标获得化学浓度 很大程度上在短时间内。 该装置根据由流量计测量的流量来控制由化学注射泵排出的量。 通过由流量计获得的每预定周期的进料量的量计算进料水中的平均化学浓度，并且通过传感器获得的每个预定周期中的罐中的化学品量减少。 基于计算的平均化学浓度和给水的预设目标化学浓度控制化学注入泵，使得平均化学物质浓度在目标化学物质浓度范围内。

公开(公告)号：US20250051203A1

公开(公告)日：2025-02-13

申请号：US18721662

申请日：2022-12-15

Applicant: KURITA WATER INDUSTRIES LTD.

Inventor： Yuta OHTSUKA ,  Chikako SHIMPO ,  Gou NAKAGAWA ,  Junichi TAKAHASHI ,  Kunihiro HAYAKAWA

IPC: C02F1/76 ,  C02F1/44

Abstract: A method for preventing microorganism fouling in a water system containing a reducing agent, said microorganism fouling prevention method for a water system being characterized by adding a stabilized chlorine-based oxidizing agent composed of a chlorine-based oxidizing agent and a sulfamic acid compound, with the ratio of the sulfamic acid compound relative to 1 mol effective chlorine of the chlorine-based oxidizing agent being 1-1.5 mol, and/or a stabilized bromine-based oxidizing agent composed of a bromine-based oxidizing agent and a sulfamic acid compound, with the ratio of the sulfamic acid compound relative to 1 mol effective chlorine conversion amount of the bromine-based oxidizing agent being 1-1.5 mol, to the water system, such that the addition concentration of the stabilized chlorine-based oxidizing agent and/or the stabilized bromine-based oxidizing agent relative to the reducing agent concentration in the water system is 2.5 times or more by molar ratio.