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61. 发明专利

JP2000088218A METHOD AND FURNACE FOR MELTING INCINERATION RESIDUE CONTAINING SALTS 失效
公开(公告)号：JP2000088218A
公开(公告)日：2000-03-31
申请号：JP25789098
申请日：1998-09-11
申请人： NIPPON KOKAN KK
发明人： NAKAHARA KEISUKE , SHINAGAWA TAKUYA , MATSUI SATOSHI
IPC分类号： B09B3/00 , F23G5/00 , F23J1/00
摘要： PROBLEM TO BE SOLVED: To melt incineration residue containing salts without producing a molten salt layer substantially in a melting furnace by blowing nonoxidative gas into the gas-phase part in the melting furnace thereby increasing exhaust gas from the melting furnace. SOLUTION: Incineration residue is loaded into a furnace stored with molten slag 31 while being kept at 1300 deg.C-1400 deg.C by conducting an electrode 11 and then subjected to melting. The incineration residue is thrown into the furnace through a loading pipe 12 and covered with molten slag 31. The incineration residue 30 covered with molten slag 31 is preheated with heat transferred from the molten slag before being melted. Fused salt produced at the time of melting the incineration residue is heated up to high temperature and vaporized sequentially to leave only a small quantity of fused salt on the molten slag layer 31. During the melting process, nonoxidative gas, e.g. nitrogen gas, is blown from a gas blowing pipe 13 in order to increase the volume of gas being discharged from an exhaust gas pipe 14. Particles of vaporized salts are carried on the gas flow and discharged from the gas outlet 14 to the outside of the furnace.

62. 发明专利

JP2000005796A METHOD FOR RECOVERING PHOSPHORUS FROM ORGANIC SLUDGE CONTAINING PHOSPHORUS 失效
公开(公告)号：JP2000005796A
公开(公告)日：2000-01-11
申请号：JP17649398
申请日：1998-06-24
申请人： NIPPON KOKAN KK
发明人： NAKAHARA KEISUKE , HOSHINO YASUSHI , MATSUI SATOSHI , SHINAGAWA TAKUYA
IPC分类号： B09B3/00 , C02F11/00
摘要： PROBLEM TO BE SOLVED: To provide a method by which sludge is furnt to ashes with only a simple treatment and phosphorus in sludge is recovered. SOLUTION: Organic sludge containing phosphorus is dehydrated, dried and charged into a closed type heating furnace 12 at a first stage to heat the sludge and carbonize the organic matters in the sludge, then the treated product is charged into a closed type heating furnace 13 at a second stage to heat the product, and the phosphorus in the treating product is diffused in a form of elemental phosphorus and the exhaust gas containing the diffused elemental phosphorus is introduced into a condenser 22 to be brought into contact with water and the elemental phosphorus is condensed and collected.

63. 发明专利

JPH11319762A RECOVERY OF PHOSPHORUS FROM PHOSPHORUS-CONTAINING INCINERATION ASH 失效
公开(公告)号：JPH11319762A
公开(公告)日：1999-11-24
申请号：JP13489198
申请日：1998-05-18
申请人： NIPPON KOKAN KK
发明人： NAKAHARA KEISUKE , HOSHINO YASUSHI , MATSUI SATOSHI , SHINAGAWA TAKUYA
IPC分类号： B09B3/00 , C01B25/02
摘要： PROBLEM TO BE SOLVED: To recover phosphorus by simple treatment such that a carbon source is mixed with incineration ash and the resulting mixture is charged in a hermetically closed heating furnace to be heated and the exhaust gas containing volatilized elemental phosphorus is brought into contact with water to condense elemental phosphorus to collect the same. SOLUTION: Incineration ash and a carbon source are introduced into a mixer 10 in a powder form to be mixed with each other and to be sent to a granulator 11, and a slight amt. of a granulating aid and water are added to the resulting mixture to form granules and these granules are dried to be charged in a hermetically closed heating furnace 12 to be heated to 1,000-1,250 deg.C. By this method, a phosphorus compd. in incineration ash is reduced to form elemental phosphorus, which is, in turn, volatilized as phosphorus vapor. The elemental phosphorus is held to a temp. of 300 deg.C or higher so that the phosphorus vapor is not coagulated to be sent to a condenser 22 and the condensed elemental phosphorus falls along with sprayed water to be drawn out to a yellow phosphorus storage tank 23 to be recovered.

64. 发明专利

JPH11253912A MELTING TREATMENT OF INCINERATION RESIDUE CONTAINING SALT 失效
公开(公告)号：JPH11253912A
公开(公告)日：1999-09-21
申请号：JP36010798
申请日：1998-12-18
申请人： NIPPON KOKAN KK
发明人： NAKAHARA KEISUKE , MATSUI SATOSHI , SHINAGAWA TAKUYA
IPC分类号： F23J1/00 , B09B3/00 , C04B5/06
摘要： PROBLEM TO BE SOLVED: To provide a method for melting and treating incineration residue containing salts in which elution of chlorine is inhibited and also slag for an aggregate free from metal content is obtained. SOLUTION: In the method for melting and treating incineration residue by using a fusion furnace 20 held in a reducing atmosphere, a component regulation material containing Ca and/or Mg or a component regulation material containing Si and/or Al is added to a incineration residue containing salts in a component regulation process 10. Value of component ratio obtained by the following formula: Component ratio (molar ratio) = (Ca+Mg)/(Si+Al), is regulated so as to become a range within 0.7-2.0. Thereafter, the component regulation material is charged into the fusion furnace 20 and melted. The molten material is retained in the fusion furnace and separated into a molten slag layer 41, a molten salt layer 40 and a molten metal layer 42. Molten slag is separated, discharged and applied to quenching treatment in a cooling process 30.

65. 发明专利

JPH11253909A METHOD AND APPARATUS FOR PROCESSING INCINERATION FLY ASH 失效
公开(公告)号：JPH11253909A
公开(公告)日：1999-09-21
申请号：JP7124298
申请日：1998-03-06
申请人： NIPPON KOKAN KK , NKK SOGO SEKKEI KK
发明人： MATSUI SATOSHI , NAKAHARA KEISUKE , YOKOYAMA TAKASHI , AIZAWA KAZUO , YAMAGISHI MIKI
IPC分类号： B09B3/00
摘要： PROBLEM TO BE SOLVED: To easily detoxify incineration fly ash containing dioxins by a method in which the ash is heated at a specified temperature or above, a part of the dioxins in the ash are gasified, the total dioxins are gasified by reducing the pressure of a container to the atmospheric pressure or below, and the gas is extracted outside the container. SOLUTION: Fly ash F is supplied from a charge hopper 2 into a heating apparatus 1 through a rotary valve 3. In this process, the ash F is heated at 300

66. 发明专利

JPH11138131A TREATMENT OF INCINERATION RESIDUE 失效
公开(公告)号：JPH11138131A
公开(公告)日：1999-05-25
申请号：JP32389397
申请日：1997-11-11
申请人： NIPPON KOKAN KK
发明人： NAKAHARA KEISUKE , MATSUI SATOSHI , SHINAGAWA TAKUYA
IPC分类号： B09B3/00
摘要： PROBLEM TO BE SOLVED: To perform decomposition treatment of dioxins of an incineration residue such as fly ash and incineration ash at low cost by subjecting a mixture of the incineration residue and water having a moisture content rate in a prescribed range to heating treatment at heating temperatures in a prescribed range. SOLUTION: An incineration residue and any one of water, alkali water solution, alkali water solution containing water soluble organic solvent are mixed to form a mixture having a mixed water content rate of 10-80%. After a pressure vessel is packed with the mixture and is closed, and is heated to 100-350 deg.C. When prescribed time corresponding to that heating temperature has elapsed, the pressure vessel is opened to vaporize the water content of the mixture by action of sensible heat, and the residue is discharged by a conveying device such as a belt conveyor. In this way, without having to perform solid-liquid separation and waste liquid treatment, hydrothermal treatment of dioxins of the incineration residue can be easily performed.

67. 发明专利

JPH11138130A MELT-TREATING METHOD OF INCINERATED RESIDUE CONTAINING SALTS 失效
公开(公告)号：JPH11138130A
公开(公告)日：1999-05-25
申请号：JP30848997
申请日：1997-11-11
申请人： NIPPON KOKAN KK
发明人： NAKAHARA KEISUKE , MATSUI SATOSHI , SHINAGAWA TAKUYA
IPC分类号： F23G7/00 , B09B3/00 , F23J1/00
摘要： PROBLEM TO BE SOLVED: To provide a melt-treating method of an incinerated residue containing salts in which discharging matter to be made harmless becomes one kind and the treatment to be made harmless of the discharging matter is simplified. SOLUTION: In a melt-treating method of an incinerated residue in which the incinerated residue containing salts is molten, the molten matter is retained in a melting furnace 10 to separate a molten slag layer 31 and a molten slat layer 30 and the molten slag and the molten salt are classified and discharged, molten fly ash scattered from the melting furnace 10 and captured through a dust collecting vessel 16 is returned to the melting furnace 10 and fused with the molten salt retaining in the melting furnace 10 and discharged. At the time of removing a heavy metal ion in the discharged molten salt, the heavy metal ion in the molten salt is reduced to a metallic form by adding a metal which is base electrically to the heavy metal and the formed heavy metal in a metallic form is separated.

68. 发明专利

JPH10318522A MELTING FURNACE FOR INCINERATION RESIDUE OF WASTE 失效
公开(公告)号：JPH10318522A
公开(公告)日：1998-12-04
申请号：JP14116297
申请日：1997-05-16
申请人： NIPPON KOKAN KK
发明人： NAKAO TSUYOSHI , NAKAHARA KEISUKE , SHINAGAWA TAKUYA
IPC分类号： F23G5/00 , F23G5/50 , F23J1/00
摘要： PROBLEM TO BE SOLVED: To obtain a melting furnace for melting incineration ash through electrodes arranged in the furnace tank and discharging molten slag through a discharging port provided on the side of the furnace tank in which the discharging work of molten slag is performed smoothly by arranging at least one electrode movably up to the vicinity of the discharge port. SOLUTION: Three elevating/lowering electrodes 2 (2A, 2B, 2C) are arranged on the furnace cover 1A of a furnace body 1 while penetrating the furnace cover 1A along with an incineration residue supply port 3 to be fixed with an incineration residue hopper 6 and an exhaust gas discharge port 4. A slag discharge port 5 is made at a lower side part. The electrodes 2A-2C are held by grippers 8A-8C provided at the end part of holding arms 7A-7C supported, respectively, by elevating/lowering bodies 9A-9C. The elevating/lowering body 9C is also movable laterally. When a molten slag 13 is taken out through the discharge port 5, the electrode 2C is shifted laterally to the vicinity of the discharge port 5 if the temperature drops thereat in order to raise the temperature of the molten slag 13.

69. 发明专利

JPH10225672A STABILIZING TREATMENT OF MOLTEN FLY ASH OF MUNICIPAL WASTE 失效
公开(公告)号：JPH10225672A
公开(公告)日：1998-08-25
申请号：JP4728297
申请日：1997-02-14
申请人： NIPPON KOKAN KK
发明人： SUDO MASAHIRO , NAKAO TSUYOSHI , NAKAHARA KEISUKE , SHINAGAWA TAKUYA
IPC分类号： A62D3/33 , A62D101/08 , A62D101/43 , B09B3/00 , A62D3/00
摘要： PROBLEM TO BE SOLVED: To convert heavy metals contained in incineration fly ash generated in an incineration furnace for municipal waste such as municipal trash and molten fly ash generated when incineration ash and the incineration fly ash are melted into stabilized compounds hardly eluted into water or the like. SOLUTION: Incineration fly ash generated associated with incineration of municipal waste and molten fly ash generated associated with melting treatment of the incineration fly ash are mixed, and sodium dialkyldithiocarbamate and water are added to the mixture to mix them to stabilize at least mercury(Hg), lead (Pb) and cadmium(Cd) in the incineration fly ash and the molten fly ash. And the added quantity of sodium dialkyldithiocarbamate is not less than the stoichiometric quantity by which it is reacted with at least all the lead(Pb) and cadmium (Cd) contained in the incineration fly ash and the molten incineration fly ash.

70. 发明专利

JPH10139503A METHOD FOR DECOLORING SLAG 失效
公开(公告)号：JPH10139503A
公开(公告)日：1998-05-26
申请号：JP30013796
申请日：1996-11-12
申请人： NIPPON KOKAN KK
发明人： NAKAHARA KEISUKE , SUDO MASAHIRO
IPC分类号： B09B3/00 , C04B5/00 , C04B5/06
摘要： PROBLEM TO BE SOLVED: To solve the problems that slag of a pale tint is formed but that the increased amt. of a treatment in resulted and the treatment cost is increased if a large amt. of lime is mixed with incineration residues in the stage for subjecting these residues to the melting treatment. SOLUTION: Calcium chloride is added to the raw material slag discharged at the time of subjecting the incineration residues of waste to the melting treatment and the slag is heated to form the melt consisting of the fused salt composed mainly of the molten slag and the calcium chloride. After this melt is stirred, the melt is held still and is separated to a molten slag layer and a fused salt layer composed mainly of the calcium chloride. The slag of the fused slag layer separated in such a manner is taken out and is cooled to solidify.

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