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公开(公告)号：US4810477A
公开(公告)日：1989-03-07
申请号：US095831
申请日：1987-09-14
CPC分类号： C01F11/464 , B01D53/501
摘要： The present invention is concerned with a method for desulfurizing smoke which includes an absorbing procedure of cleaning a combustion exhaust gas with a limestone slurry; an oxidizing procedure of blowing air into the slurry coming from the absorbing process to oxidize calcium sulfite in the slurry to gypsum; a circulating process of circulating, through the absorbing procedure, the slurry coming from the oxidizing procedure; and a separating procedure of drawing a part of the slurry from the circulating procedure, separating and recovering gypsum therefrom, and returning the remaining slurry to the circulating system. The method is characterized in that a separator for separating the fed slurry into an over flow and an under flow is used, and the fed slurry is irradiated with ultrasonic waves to accelerate the separation of gypsum particles from limestone particles, whereby the limestone particles and the gypsum particles are transferred to the over flow and the under flow, respectively.
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公开(公告)号：US4696805A
公开(公告)日：1987-09-29
申请号：US821600
申请日：1986-01-23
CPC分类号： B01D53/501 , B01D53/68
摘要： Here are disclosed a method for desulfurizing an exhaust gas which is characterized by comprising a gas absorbing section in which an absorbing solution absorbs SO.sub.2 in the exhaust gas in order to become an acid solution containing a sulfite; an oxidizing section in which the sulfite is oxidized; a neutralizing section in which the absorbing solution is neutralized by adding an SO.sub.2 absorbent; and a closed circulating circuit for delivering the solution drawn out from the gas absorbing section to the oxidizing section, delivering the solution drawn out from the oxidizing section to the neutralizing section, and delivering the solution drawn out from the neutralizing section to the gas absorbing section; and a method for simultaneously treating SO.sub.2 and HCl which the abovementioned exhaust gas contains.
摘要翻译： 这里公开了一种废气脱硫方法，其特征在于包括：吸收溶液吸收废气中的SO 2以吸收含有亚硫酸盐的酸溶液的气体吸收部; 氧化部分，其中亚硫酸盐被氧化; 中和部，其中通过添加SO 2吸收剂中和吸收溶液; 以及封闭循环回路，用于将从气体吸收部抽出的溶液输送到氧化部，将从氧化部排出的溶液输送到中和部，将从中和部抽出的溶液输送到气体吸收部 ; 以及同时处理上述排气所含的SO 2和HCl的方法。
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公开(公告)号：US4696804A
公开(公告)日：1987-09-29
申请号：US821608
申请日：1986-01-23
CPC分类号： B01D53/501
摘要： Here is disclosed a method for treating SO.sub.2, SO.sub.3 and a dust simultaneously which comprises causing an exhaust gas containing at least SO.sub.2, SO.sub.3 and the dust to pass through a dry dust collector in order to remove most of the dust therefrom, delivering the exhaust gas to a gas absorbing device, and using at least one of calcium hydroxide and calcium carbonate as an absorbent in the gas absorbing device to remove SO.sub.2 and the dust, which has passed through the dry dust collector, in the exhaust gas therefrom, the method being characterized by comprising the steps of blowing air into an absorbing solution fed to the gas absorbing device in order to oxidize the absorbing solution and to thereby form a gypsum therein; separating a part of the absorbing solution into a slurry mainly containing the gypsum grains and a slurry mainly containing the dust; obtaining the by-product gypsum from the slurry mainly containing the gypsum grains; adding an alkali to the slurry mainly containing the dust; spraying this slurry into the exhaust gas on the upstream side of the dry dust collector; carrying out the collection, drying and solidification of SO.sub.3 ; and collecting the resultant solid together with the dust by the dry dust collector.
摘要翻译： 这里公开了一种同时处理SO 2，SO 3和粉尘的方法，其包括使含有至少SO 2，SO 3和废气的废气通过干式集尘器以除去其中的大部分灰尘，从而将废气 在气体吸收装置中使用氢氧化钙和碳酸钙中的至少一种作为吸收剂，除去已经通过干式集尘器的SO 2和来自其的废气中的灰尘，该方法为 其特征在于包括以下步骤：将空气吹送到供给气体吸收装置的吸收溶液中，以便氧化吸收溶液，从而在其中形成石膏; 将一部分吸收溶液分离成主要含有石膏颗粒的浆料和主要含有灰尘的浆料; 从主要含有石膏颗粒的浆料中获得副产物石膏; 向主要含有灰尘的浆料中加入碱; 将该浆料喷射到干式除尘器上游侧的废气中; 进行SO3的收集，干燥和固化; 并通过干式集尘器将所得固体与灰尘一起收集。
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公开(公告)号：US4675167A
公开(公告)日：1987-06-23
申请号：US587188
申请日：1984-03-07
CPC分类号： B01D53/34 , B01D53/501 , B01D53/68
摘要： In treating exhaust gases containing SO.sub.2, HCl and HF, there is disclosed a method of treating such exhaust gas which comprises detecting the amounts of HCl and HF in the exhaust gas and supplying an amount of a magnesium compound commensurate with a stoichiometric amount to become at least MgCl.sub.2 and MgF.sub.2 in an exhaust-gas treating tower and a calcium compound as a SO.sub.2 solvent into the exhaust-gas treating tower.The aforesaid method of treating an exhaust gas comprises a method of causing Mn ion to coexist in an absorbing solution in contact with the exhaust gas.
摘要翻译： 在处理含有SO 2，HCl和HF的废气时，公开了一种处理这种废气的方法，该方法包括检测排气中的HCl和HF的量，并将一定量的化学计量的镁化合物供给到 废气处理塔中的MgCl 2和MgF 2最少，作为SO 2溶剂的钙化合物进入废气处理塔。 上述处理废气的方法包括使Mn离子在与废气接触的吸收溶液中共存的方法。
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5.发明授权Method for treating waste gas to separate and recover gypsum and dust therein 失效处理废气以分离和回收其中的石膏和粉尘的方法
公开(公告)号：US4632810A
公开(公告)日：1986-12-30
申请号：US706117
申请日：1985-02-27
CPC分类号： C01F11/464 , B01D53/501
摘要： The present invention is directed to a method for treating a waste gas to separate and recover gypsum and a dust therein, characterized by comprising the steps of causing the waste gas to pass through a dry dust collector; introducing the gas into a gas absorber, in which a slurry containing at least one of calcium hydroxide or calcium carbonate as an absorbent is employed to remove SO.sub.2 and the dust passed through the dry dust collector from the waste gas; blowing air into the resultant absorbing liquid in the gas absorber to oxidize the absorbing liquid and to thereby produce gypsum; delivering them to an absorbing liquid tank, in which the slurry mainly containing the gypsum grains is separated from the other slurry mainly containing the dust by partition walls disposed therein; and directly taking out the respective slurries separately from the absorbing liquid tank.
摘要翻译： 本发明涉及一种处理废气以分离和回收石膏和其中的灰尘的方法，其特征在于包括使废气通过干式除尘器的步骤; 将气体引入气体吸收器中，其中使用含有氢氧化钙或碳酸钙中的至少一种作为吸收剂的浆料来从废气中除去SO 2和通过干式集尘器的粉尘; 将空气吹送到吸收剂中的所得吸收液体中以氧化吸收液体，从而产生石膏; 将其输送到吸收液体罐中，其中主要含有石膏颗粒的浆料与主要由灰尘组成的其它浆料与设置在其中的分隔壁分离; 并直接从吸收液体罐中取出各自的浆料。
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6.发明授权Method of producing solid moldings from a by-product of wet limestone-gypsum desulfurization of flue gas 失效从烟气湿石灰石 - 石膏脱硫副产品生产固体成型品的方法
公开(公告)号：US5395561A
公开(公告)日：1995-03-07
申请号：US978259
申请日：1992-11-20
申请人： Naohiko Ukawa , Hiroshi Fujita , Toru Takashina , Masakazu Onizuka , Atsushi Tatani , Kenji Inoue , Tsuyoshi Ohishi
发明人： Naohiko Ukawa , Hiroshi Fujita , Toru Takashina , Masakazu Onizuka , Atsushi Tatani , Kenji Inoue , Tsuyoshi Ohishi
摘要： A method of producing solid molding products from a slurry which has undergone absorption in wet-limestone gypsum desulfurization of flue gas includes the steps of concentrating the gypsum-containing absorption slurry, mixing and kneading the solid concentrated slurry with flyash and quicklime or slaked lime, molding the mixture into a given shape using a mold and then curing a resulting molding product in a reaction chamber wherein a part of desulfurized gas is passed. The method also includes solidifying a molded product by drying with water-saturated hot air produced with heat recovered from the flue gas and with water added into a heat recovery process.
摘要翻译： 从在烟道气湿石灰石膏脱硫中经历吸收的浆料生产固体成型产品的方法包括浓缩含石膏的吸收浆料，将固体浓缩浆料与飞灰和生石灰或熟石灰混合和捏合的步骤， 使用模具将混合物成型为给定形状，然后在所述一部分脱硫气体通过的反应室中固化所得模制产品。 该方法还包括通过用从烟道气回收的热量产生的水饱和热空气和加入热回收过程中的水进行干燥来固化模制产品。
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公开(公告)号：US4539190A
公开(公告)日：1985-09-03
申请号：US649482
申请日：1984-09-11
申请人： Naoharu Shinoda , Atsushi Tatani , Kenji Inoue , Susumu Okino
发明人： Naoharu Shinoda , Atsushi Tatani , Kenji Inoue , Susumu Okino
CPC分类号： B01D53/68 , B01D53/30 , B01D53/501
摘要： A method for the wet treatment of combustion exhaust gases comprising SO.sub.2 and HCl, the method comprising detecting an amount of HCl in the exhaust gas and feeding, to an exhaust gas treating tower, a sodium salt in an amount corresponding to at least the detected amount of HCl so that all the HCl is able to be converted into NaCl in the exhaust gas treating tower, along with CaCO.sub.3 or Ca(OH).sub.2 used as an SO.sub.2 absorbent.
摘要翻译： 一种用于湿处理包含SO 2和HCl的燃烧废气的方法，所述方法包括检测排气中的HCl的量并将排放气体处理塔中的至少相应于检测量的钠盐 的HCl，使得所有的HCl能够在排气处理塔中与用作SO 2吸收剂的CaCO 3或Ca（OH）2一起转化为NaCl。
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公开(公告)号：US4374812A
公开(公告)日：1983-02-22
申请号：US211083
申请日：1980-11-28
申请人： Masumi Atsukawa , Naoharu Shinoda , Atsushi Tatani , Taku Shimizu
发明人： Masumi Atsukawa , Naoharu Shinoda , Atsushi Tatani , Taku Shimizu
CPC分类号： B01D53/501
摘要： A wet process for stack gas treatment wherein the stack gas is scrubbed with a suspension containing calcium hydroxide and/or calcium carbonate to remove sulfur oxides from the gas, characterized in that(1) air or oxygen-containing gas is supplied to the gas scrubber so as to oxidize at least 18% of the sulfur oxides absorbed by the scrub liquid to gypsum, and then part of the gypsum from the gypsum-containing scrub liquid partly taken out is recycled to the scrubber, or(2) part or whole of the scrub liquid is taken out from the scrubber into an oxidizer, where it is oxidized with the supply of air or oxygen-containing gas, and, after the oxidation, part of the scrub liquid from the oxidizer is recycled to the scrubber, whereby at least 18% of the sulfur oxides absorbed from the gas by the scrub liquid is oxidized to gypsum.
摘要翻译： 一种用于堆叠气体处理的湿法，其中堆叠气体用含有氢氧化钙和/或碳酸钙的悬浮液洗涤以从气体中除去硫氧化物，其特征在于（1）将空气或含氧气体供应到气体洗涤器 以将至少18％的由洗涤液吸收的硫氧化物氧化成石膏，然后将部分取出的含有石膏的洗涤液的部分石膏再循环到洗涤器中，或（2）部分或全部 将洗涤液从洗涤器中取出进入氧化剂，在那里氧气被供应空气或含氧气体氧化，氧化后，来自氧化剂的洗涤液的一部分再循环到洗涤器中， 通过洗涤液从气体中吸收的硫氧化物的至少18％被氧化成石膏。
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公开(公告)号：US4420465A
公开(公告)日：1983-12-13
申请号：US390835
申请日：1982-06-22
申请人： Naoharu Shinoda , Atsushi Tatani , Naohiko Ukawa , Michio Oshima , Susumu Okino , Sadaichi Shigeta
发明人： Naoharu Shinoda , Atsushi Tatani , Naohiko Ukawa , Michio Oshima , Susumu Okino , Sadaichi Shigeta
CPC分类号： C01F11/464 , B01D53/501
摘要： A process for desulfurizing an exhaust gas which comprises desulfurizing an exhaust gas containing SO.sub.2 by bringing it into contact with a slurry containing calcium compounds and aluminum compounds, characterized in that the concentration of the dissolved aluminum ion in said slurry is detected and a manganese compound is supplied into said slurry in such a manner that the ratio of the concentration of manganese (including both solid and liquid) to said concentration of the dissolved aluminum ion may be maintained in a molar ratio of less than 1 in said slurry.
摘要翻译： 一种废气脱硫方法，其特征在于，将含有二氧化硫的废气与含有钙化合物和铝化合物的浆料接触，其特征在于检测所述浆料中溶解的铝离子的浓度，锰化合物为 供给到所述浆料中，使得所述浆料中锰（包括固体和液体两者）的浓度与所述溶解的铝离子的浓度之比可保持小于1的摩尔比。
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10.发明授权
公开(公告)号：US4618482A
公开(公告)日：1986-10-21
申请号：US643456
申请日：1984-08-23
申请人： Naoharu Shinoda , Atsushi Tatani , Setsuo Omoto , Susumu Okino , Taku Shimizu
发明人： Naoharu Shinoda , Atsushi Tatani , Setsuo Omoto , Susumu Okino , Taku Shimizu
CPC分类号： B01D53/501 , C01F11/464
摘要： A method for controlling the concentration of a slurry in an absorption tower in which a flue gas comprising SO.sub.2 is brought into contact with a slurry containing suspended Ca compounds therein to absorb the SO.sub.2 with the compounds. The method comprises withdrawing the slurry from the absorption tower in such a way that the slurry is divided into at least two groups with different concentrations, one group being a slurry having a higher concentration of the Ca compound, the other group being a slurry having a lower concentration of the Ca compound, and regulating rates of the slurries being withdrawn from the absorption tower whereby the concentration of the Ca compound in the slurry being contacted with the flue gas is controlled.
摘要翻译： 用于控制吸收塔中的浆料浓度的方法，其中包含SO 2的烟道气与其中含有悬浮的Ca化合物的浆料接触，以吸收化合物的SO 2。 该方法包括从吸收塔中取出浆料，使浆料分成至少两个不同浓度的组，一组是Ca化合物浓度较高的浆料，另一组是具有 较低浓度的Ca化合物，以及从吸收塔中排出的浆料的调节速率，从而控制浆料中与该烟道气接触的Ca化合物的浓度。
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