公开(公告)号：US5246678A

公开(公告)日：1993-09-21

申请号：US821706

申请日：1992-01-16

申请人： Eiji Ochi ,  Kiyoshi Okazoe ,  Naohiko Ukawa ,  Susumu Okino

发明人： Eiji Ochi ,  Kiyoshi Okazoe ,  Naohiko Ukawa ,  Susumu Okino

IPC分类号： B01D53/34 ,  B01D53/50 ,  B01D53/77 ,  C01F11/46 ,  C01B17/00 ,  C01B17/22

CPC分类号： C01F11/464 ,  B01D53/501 ,  B01D53/504

摘要： A desulfurization process which comprises the steps of bringing a combustion exhaust gas into contact with a gypsum slurry containing 1% or less of calcium carbonate in a first absorption tower, and then bringing the combustion exhaust gas into contact with a gypsum slurry containing 1% or more of calcium carbonate in a second absorption tower. SO.sub.x can be removed from a combustion exhaust gas with a high efficiency in accordance with a wet lime/gypsum method.

公开(公告)号：US5034028A

公开(公告)日：1991-07-23

申请号：US445399

申请日：1989-12-04

申请人： Naohiko Ukawa ,  Susumu Okino ,  Taku Shimizu ,  Kouichiro Iwashita

发明人： Naohiko Ukawa ,  Susumu Okino ,  Taku Shimizu ,  Kouichiro Iwashita

IPC分类号： B01D53/34 ,  B01D53/50 ,  B01D53/68 ,  B01D53/77

CPC分类号： B01D53/68 ,  B01D53/501

摘要： A method of treating an exhaust gas containing SO.sub.2 and HF which is characterized by using an absorbing liquid containing CaCO.sub.3 and Ca(OH).sub.2 as absorbents to be fed to an absorption tower for the exhaust gas, circulating the absorbing liquid from a second slurry tank to the absorption tower, from the absorption tower to a first slurry tank, and from the first flurry tank to the second slurry tank, introducing Ca(OH).sub.2 into the second slurry tank to keep the pH value of the absorbing liquid in the second slurry tank in the range of 5.5-7.0, and blowing air into the absorbing liquid in the first slurry tank.

公开(公告)号：US20120328501A1

公开(公告)日：2012-12-27

申请号：US13305049

申请日：2011-11-28

申请人： Masaki Iijima ,  Tsuyoshi Oishi ,  Takashi Kamijo ,  Hiroshi Tanaka ,  Hiromitsu Nagayasu ,  Naohiko Ukawa

发明人： Masaki Iijima ,  Tsuyoshi Oishi ,  Takashi Kamijo ,  Hiroshi Tanaka ,  Hiromitsu Nagayasu ,  Naohiko Ukawa

IPC分类号： B01D53/96

CPC分类号： B01D53/1475 ,  B01D53/1481 ,  B01D53/50 ,  B01D53/62 ,  B01D2252/204 ,  B01D2257/302 ,  B01D2257/504 ,  Y02A50/2342 ,  Y02A50/2348 ,  Y02C10/06 ,  Y02E20/326

摘要： An air pollution control system includes a desulfurization apparatus 13 that reduces sulfur oxide contained in flue gas 12 supplied from a boiler 11; and a CO2 recovery apparatus 15 including a CO2 absorber 21 that reduces CO2 contained in flue gas 12 that has been desulfurized by the desulfurization apparatus, with the aid of an amine absorbent and an absorbent regenerator 22 that regenerates the amine absorbent. Part 14a of desulfurized flue gas 14 containing SOx is supplied to treated flue gas 16, from which CO2 has been reduced and which is discharged from a top portion of the CO2 absorber 21, so that remaining mist amine accompanying the treated flue gas 16 is neutralized to amine sulfate or amine sulfite.

摘要翻译： 空气污染控制系统包括：脱硫装置13，其减少从锅炉11供给的烟道气12中所含的硫氧化物; 以及CO 2回收装置15，其包括CO 2吸收器21，其借助于再生胺吸收剂的胺吸收剂和吸收剂再生器22，减少已被脱硫装置脱硫的烟道气12中所含的CO 2。 含有SO x的脱硫烟道14的第14a部分被供应到经处理的烟道气16中，CO 2已经从其中被还原，并且从CO 2吸收器21的顶部排出，使得伴随处理的烟道气16的剩余雾胺被中和 到硫酸胺或亚硫酸胺。

公开(公告)号：US06511636B1

公开(公告)日：2003-01-28

申请号：US09407042

申请日：1999-09-27

申请人： Taku Shimizu ,  Kazuaki Kimura ,  Kiyoshi Okazoe ,  Atsushi Tatani ,  Naohiko Ukawa ,  Masao Hino ,  Susumu Okino ,  Takashi Haruki ,  Toru Takashina ,  Eiji Ochi

发明人： Taku Shimizu ,  Kazuaki Kimura ,  Kiyoshi Okazoe ,  Atsushi Tatani ,  Naohiko Ukawa ,  Masao Hino ,  Susumu Okino ,  Takashi Haruki ,  Toru Takashina ,  Eiji Ochi

IPC分类号： B01D5000

CPC分类号： C10M173/02 ,  B01D53/46 ,  B01D53/501 ,  C10M2215/042 ,  C10M2229/045 ,  C10M2229/046 ,  C10N2220/13 ,  C10N2240/58 ,  F23J15/003 ,  F23J15/022 ,  F23J2215/20 ,  F23J2219/50

摘要： Five combustion exhaust gas treatment systems capable of removing dust and selenium (Se) in combustion exhaust gas and making harmless are proposed: (1) combustion exhaust gas is cooled to 350° C. or less, dust is separated, Se is transformed into insoluble compound, and Se is separated; (2) combustion exhaust gas is cooled to 350° C. or less, dust is separated, Se elution preventive agent is added, and dust is formed into scale; (3) dust in combustion exhaust gas is collected by dust collector, dust is formed into slurry by making use of part of circulation liquid in desulfurization apparatus, and tetravalent Se in dust slurry is transformed into insoluble compound, which is separated into solid and liquid; (4) dust is separated from combustion exhaust gas by dust collector, and it is heated to gasify Se, and is led into desulfurization apparatus, etc., and formed into slurry, and Se is made into insoluble compound; and (5) a treating agent for making tetravalent Se insoluble is added to part of circulation liquid in desulfurization apparatus, and it is sprayed into combustion exhaust gas to make Se insoluble.

公开(公告)号：US06203598B1

公开(公告)日：2001-03-20

申请号：US09246130

申请日：1999-02-08

申请人： Shigeo Hasegawa ,  Naohiko Ukawa ,  Susumu Okino ,  Koichiro Iwashita ,  Kazuaki Kimura ,  Atsushi Yoshioka ,  Yoshimitsu Kawanishi ,  Shoichi Onishi ,  Toru Takashina ,  Toyoshi Nakagawa

发明人： Shigeo Hasegawa ,  Naohiko Ukawa ,  Susumu Okino ,  Koichiro Iwashita ,  Kazuaki Kimura ,  Atsushi Yoshioka ,  Yoshimitsu Kawanishi ,  Shoichi Onishi ,  Toru Takashina ,  Toyoshi Nakagawa

IPC分类号： B01D5310

CPC分类号： B01D53/75 ,  B01D53/501 ,  B01D53/502 ,  B01D53/508 ,  B01D2251/404 ,  B01D2257/302

摘要： This invention relates to a flue gas treating process including a heat recovery step for recovering heat from flue gas by means of a heat exchanger (4) and thereby cooling the flue gas, and a subsequent absorption step for bringing the flue gas into gas-liquid contact with an absorbing fluid (D) in absorption towers (12, 13) so as to remove at least SO2 present in the flue gas by absorption into the absorbing fluid (D), which is characterized, for example, in that a powder addition step for spraying a powder collectable in the absorption step into the flue gas is provided prior to the heat recovery step. This invention makes it possible to provide a flue gas treating process in which a countermeasure against SO3 present in flue gas can be easily achieved without resorting to ammonia injection and the flue gas can further be purified without the disadvantage of causing the injected substance to remain in the treated flue gas.

摘要翻译： 烟气处理方法技术领域本发明涉及一种烟道气处理方法，其包括通过热交换器（4）从烟道气中回收热量并由此冷却烟道气的热回收步骤，以及随后的吸收步骤，用于将烟道气引入气液 与吸收塔（12,13）中的吸收流体（D）接触，以便通过吸收到吸收流体（D）中来除去烟道气中存在的至少SO 2，其特征在于：粉末添加 在热回收步骤之前提供将在吸收步骤中可收集的粉末喷射到烟道气中的步骤。 本发明使得可以提供一种烟道气处理方法，其中可以容易地实现对烟气中存在的SO 3的对策，而不需要采用氨注射，并且可以进一步净化烟道气，而不会导致注入物质残留 经处理的烟气。

公开(公告)号：US6113863A

公开(公告)日：2000-09-05

申请号：US592116

申请日：1996-01-26

申请人： Taku Shimizu ,  Kazuaki Kimura ,  Kiyoshi Okazoe ,  Atsushi Tatani ,  Naohiko Ukawa ,  Masao Hino ,  Susumu Okino ,  Takashi Haruki ,  Toru Takashina ,  Eiji Ochi

发明人： Taku Shimizu ,  Kazuaki Kimura ,  Kiyoshi Okazoe ,  Atsushi Tatani ,  Naohiko Ukawa ,  Masao Hino ,  Susumu Okino ,  Takashi Haruki ,  Toru Takashina ,  Eiji Ochi

IPC分类号： B01D53/46 ,  B01D53/50 ,  F23J15/00 ,  F23J15/02 ,  B01D50/00

CPC分类号： C10M173/02 ,  B01D53/46 ,  B01D53/501 ,  F23J15/003 ,  F23J15/022 ,  C10M2215/042 ,  C10M2229/045 ,  C10M2229/046 ,  C10N2220/13 ,  C10N2240/58 ,  F23J2215/20 ,  F23J2219/50

摘要： Five combustion exhaust gas treatment systems capable of removing dust and selenium (Se) in combustion exhaust gas and making harmless are proposed: (1) combustion exhaust gas is cooled to 350.degree. C. or less, dust is separated, Se is transformed into insoluble compound, and Se is separated; (2) combustion exhaust gas is cooled to 350.degree. C. or less, dust is separated, Se elution preventive agent is added, and dust is formed into scale; (3) dust in combustion exhaust gas is collected by dust collector, dust is formed into slurry by making use of part of circulation liquid in desulfurization apparatus, and tetravalent Se in dust slurry is transformed into insoluble compound, which is separated into solid and liquid; (4) dust is separated from combustion exhaust gas by dust collector, and it is heated to gasify Se, and is led into desulfurization apparatus, etc., and formed into slurry, and Se is made into insoluble compound; and (5) a treating agent for making tetravalent Se insoluble is added to part of circulation liquid in desulfurization apparatus, and it is sprayed into combustion exhaust gas to make Se insoluble.

摘要翻译： 提出了能够除去燃烧废气中的灰尘和硒（Se），无害化的五种燃烧废气处理系统：（1）燃烧废气冷却至350℃以下，灰尘分解， 化合物，Se分离; （2）燃烧废气冷却至350℃以下，粉尘分离，加入Se洗脱剂，灰尘形成规模; （3）燃烧废气中的灰尘由集尘器收集，利用脱硫装置中循环液的一部分形成粉尘，并将粉尘浆中的四价硒转化为不溶性化合物，分离成固体和液体 ; （4）灰尘通过集尘器与燃烧废气分离，并被加热气化Se，并被引入脱硫装置等，形成浆料，Se成不溶性化合物; （5）在脱硫装置的一部分循环液中加入四价Se不溶性的处理剂，喷入燃烧废气中使Se不溶。

公开(公告)号：US6029100A

公开(公告)日：2000-02-22

申请号：US798859

申请日：1997-02-11

申请人： Koichiro Iwashita ,  Susumu Okino ,  Naohiko Ukawa ,  Masaru Sakamoto

发明人： Koichiro Iwashita ,  Susumu Okino ,  Naohiko Ukawa ,  Masaru Sakamoto

IPC分类号： B01D53/34 ,  B01D53/50 ,  B01D53/77 ,  G05B6/00

CPC分类号： B01D53/501 ,  B01D53/346 ,  Y10S423/05

摘要： There is provided a method for flue gas desulfurization which is capable of conducting minute control of oxidation and which is capable of maintaining the concentration of sulfurous acid in an absorbent liquid within a proper range in a highly reliable and efficient manner, even in the case where an abrupt change occurs in the operational conditions of the system. In the method for controlling the oxidation in flue gas desulfurization, the value of proportional sensitivity K in the feed back control process, which is based primarily on the oxidation-reduction potential, is increased depending on the deviation .epsilon. in a region where the detected oxidation reduction potential value PN is below the target oxidation reduction potential value SN in correspondence with the characteristic change of the oxidation-reduction potential against the concentration of sulfurous acid.

摘要翻译： 本发明提供了一种烟气脱硫方法，其能够进行微小的氧化控制，并且能够以高可靠性和高效率的方式将吸收液中的亚硫酸浓度保持在适当的范围内，即使在 在系统的操作条件下发生突然变化。 在用于控制烟道气脱硫中的氧化的方法中，主要基于氧化还原电位的反馈控制过程中的比例灵敏度K的值根据检测到的氧化的区域中的偏差ε增加 还原电位值PN与氧化还原电位相对于亚硫酸浓度的特性变化相对应，低于目标氧化还原电位值SN。

公开(公告)号：US5662794A

公开(公告)日：1997-09-02

申请号：US518500

申请日：1995-08-23

申请人： Kiyoshi Okazoe ,  Atsushi Tatani ,  Taku Shimizu ,  Naohiko Ukawa

发明人： Kiyoshi Okazoe ,  Atsushi Tatani ,  Taku Shimizu ,  Naohiko Ukawa

IPC分类号： B01D33/04 ,  B01D53/50 ,  B01D53/77 ,  C01F11/46 ,  C04B11/26 ,  B01D53/34

CPC分类号： B01D53/504 ,  C01F11/464 ,  C04B11/264

摘要： A solid-liquid separator comprising a first roller disposed on one side of a tank containing a slurry subjected to solid-liquid separation at such a height that the lower part thereof is immersed in the slurry, and driven rotationally in a direction which enables the slurry attached to its surface to be lifted up and discharged to the outside of the tank; and a second roller disposed above the first roller facing the first roller so that the second roller comes into pressure contact with the slurry attached to the first roller and lifted up so as to remove the liquid from the slurry; as well as a wet flue gas desulfurization apparatus using this solid-liquid separator.

摘要翻译： 一种固液分离器，其特征在于，包括：第一辊，该第一辊设置在容纳固液分离的浆料的一侧，其高度使其下部浸入浆料中，并沿着使浆料 附着在其表面上以提升并排放到罐的外部; 以及第二辊，其设置在面向所述第一辊的所述第一辊上方，使得所述第二辊与附接到所述第一辊的所述浆料压力接触并提升，以从所述浆料中除去所述液体; 以及使用该固液分离器的湿式烟道气脱硫装置。

公开(公告)号：US5209905A

公开(公告)日：1993-05-11

申请号：US803172

申请日：1991-12-05

申请人： Masakazu Onizuka ,  Kenji Inoue ,  Naohiko Ukawa ,  Susumu Okino ,  Toru Takashina

发明人： Masakazu Onizuka ,  Kenji Inoue ,  Naohiko Ukawa ,  Susumu Okino ,  Toru Takashina

IPC分类号： B01D53/18 ,  B01D53/34 ,  B01D53/50 ,  C01F11/46

CPC分类号： C01F11/464 ,  B01D53/501 ,  B01D53/504 ,  Y10S261/75

摘要： A wet-type exhaust gas desulfurization system comprises a reservoir for trapping an absorbing solution which has absorbed SO.sub.2 from exhaust gas; an absorbing solution circulating tank disposed directly under the reservoir; a plurality of bottom pipes which are installed at the bottom of reservoir and extend downward into the absorbing solution in the circulating tank and whose lower end is open, or drop pipes which depend into the absorbing solution and whose lower ends are open; and air supply pipe at least one end of which is open to the atmosphere; a pipe for discharging the air above the surface of absorbing solution onto the surface of solution in the reservoir; and a pipe for supplying the absorbing solution in the circulating tank to a spray nozzle at the upper part of the absorbing tower.

摘要翻译： 湿式废气脱硫系统包括用于捕集从废气吸收SO 2的吸收溶液的储存器; 位于储存器正下方的吸收溶液循环罐; 多个底部管道，其安装在储存器的底部并向下延伸到循环罐中的吸收溶液中，并且其下端打开;或下降管，其依赖于吸收溶液并且其下端敞开; 空气供给管的至少一端向大气敞开; 用于将吸收溶液表面上方的空气排放到储存器中的溶液表面上的管道; 以及用于将循环罐中的吸收溶液供应到吸收塔上部的喷嘴的管道。

公开(公告)号：US5132027A

公开(公告)日：1992-07-21

申请号：US618251

申请日：1990-11-21

申请人： Naohiko Ukawa ,  Susumu Okino ,  Toru Takashina ,  Masakazu Onizuka

发明人： Naohiko Ukawa ,  Susumu Okino ,  Toru Takashina ,  Masakazu Onizuka

IPC分类号： B01D53/34 ,  B01D53/50 ,  B01D53/77 ,  C01F11/46

CPC分类号： B01D53/501 ,  C01F11/464

摘要： In a wet lime desulfurization of exhaust gases containing SO.sub.2 and fly ash, a method and apparatus for treating absorbent solution slurry-containing fly ash includes diverting at least a part of the absorbent solution slurry containing fly ash particles, separating the diverted absorbent solution slurry by centrifugal separation into the solid gypsum component and a liquid component of a suspension containing fine fly ash particles, adjusting the pH value of the suspension containing fine fly ash particles remaining in a filtrate to 6 to 9 by adding an alkali, supplying the pH adjusted suspension to a thickener, removing concentrated sludge from the thickener, passing overflow H.sub.2 O from the thickener to a limestone slurry tank, and passing slurry from the limestone slurry tank to the absorbent solution slurry as make-up feed. Ill effects caused by fly ash and HF in exhaust gases are avoided, the activity of CaCo.sub.3 in the absorbent slurry is maintained, and highly pure gypsum is recovered.