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21. 发明专利

JP2001221405A CIRCULATING TYPE FLUIDIZED BED COMBUSTION FURNACE 失效
公开(公告)号：JP2001221405A
公开(公告)日：2001-08-17
申请号：JP2000030853
申请日：2000-02-08
申请人： MITSUBISHI HEAVY IND LTD
发明人： SHIMIZU YOSHIHITO , HONDA HIROKI , IBE HARUSHIGE , HENMI MASATOMO
IPC分类号： F23G5/30 , F23C10/02
摘要： PROBLEM TO BE SOLVED: To save an entire space of a device, improve a circulating efficiency as well as a temperature efficiency of fluidized sand and provide a stabilized operating state of a fluidized bed furnace. SOLUTION: A circulating type fluidized bed combustion furnace comprised of a main body of the fluidized bed furnace where combustion is being carried out while fluidized sand and ignited substances are being mixed and a particle circulating part for returning the fluidized sand flown out of the main body into the main body of the fluidized bed furnace, wherein an inner space of the furnace having a gas dispersion part at its bottom section is divided into a right side and a left side in such a way that the upper part of the gas dispersion part and the furnace top part are communicated to each other through a partition wall, one side of it is applied as the main body of the fluidized bed furnace and the other side of it is applied as the particle circulating part so as to attain an integral structure and at the same time the upper part of the gas dispersion part at the lower part of the partition wall is applied as an opened space communicating between the particle circulating part and the main body of the fluidized bed furnace, the opened space is set at a counter-gravity direction and transferred by control air blown up from the gas dispersion part.

22. 发明专利

JPH11304110A INTERNAL CIRCULATION TYPE FLUIDIZED BED FURNACE 失效
公开(公告)号：JPH11304110A
公开(公告)日：1999-11-05
申请号：JP11318298
申请日：1998-04-23
申请人： MITSUBISHI HEAVY IND LTD
发明人： TAGUMA MASAO , HONDA HIROKI , SHIMIZU YOSHIHITO , ARAOKA MAMORU , OKUNO SATOSHI
IPC分类号： F23C10/02 , F23G5/30 , F23C11/02
摘要： PROBLEM TO BE SOLVED: To increase an interior space for installing a group of inside-bed heat transfer tubes, while achieving compactness of an entire fluidized bed furnace, by forming a bulkhead in substantially a cylindrical shape, and forming a combustion portion at the inner peripheral side thereof and a ring-shaped heat recovery portion at the outer peripheral side thereof. SOLUTION: A secondary combustion chamber 1B is provided at an upper part, and a fluidized bed 1A is provided at a lower part. The fluidized bed 1A is formed concentrically as having a longer diameter in comparison with the upper secondary combustion chamber 1B. A bulkhead 3 for separating a combustion portion 10 from a heat recovery portion 2 is formed substantially in a cylindrical shape. The combustion portion 10 is provided at the inner peripheral side of the bulkhead 3, and the ring-shaped heat recovery portion 2 is provided at the outer peripheral side thereof. Inside-bed heat transfer tubes 4 are, respectively, inserted into the heat recovery portion 2 from four directions of left and right, and top and bottom so that fluidized air is fed at a superficial velocity U1 in the tubes downward of the central portion of the combustion portion 10 side, and at a superficial velocity U2 downward of the ring-shaped peripheral side of the heat recovery portion 2 side, respectively, while making a difference between velocities (U1>U2).

23. 发明专利

JPH0979542A SUPERHEATED STEAM MAKING APPARATUS UTILIZING INCINERATION HEAT OF WASTE 失效
公开(公告)号：JPH0979542A
公开(公告)日：1997-03-28
申请号：JP26247495
申请日：1995-09-13
申请人： MITSUBISHI HEAVY IND LTD
发明人： HORIZOE HIROTOSHI , NISHIKAWA SUSUMU , SHIMIZU YOSHIHITO , YASUDA SHIZUO , OGAWA HIDETA
IPC分类号： F23G5/30 , F22B1/18 , F22G1/16 , F23C10/00 , F23C10/20 , F23G5/00 , F23G5/027 , F23G5/16 , F23G5/32 , F23G5/46 , F23G7/00 , F23J1/00 , F23C11/02
摘要： PROBLEM TO BE SOLVED: To obtain high temperature/high pressure superheated steam while preventing high temperature corrosion of a boiler tube as caused by chlorine. SOLUTION: This superheated steam making apparatus has a thermal decomposition means 1 (for thermal decomposition reaction within a space at a temp. of at least 300 deg.C), a char combustion means 10, a first steam making means 24 (for obtaining steam at a temp. of at most 400 deg.C) and a second steam making means 20. On the outlet side 7 of the thermal decomposition means 1, air less in quantity than the air to be supplied to a reheating means 40, specifically, the air less than the theoretical air quantity is introduced into a thermal decomposition gas path on the outlet side of the thermal decomposition means to prevent adhesion of tar and coking in an outlet line. Then, a sufficient air is supplied to the reheating means 40 provided in the outlet line 7 to accomplish complete combustion of a thermal decomposition gas.

24. 发明专利

JPH0979539A SUPERHEATED STEAM MAKING APPARATUS UTILIZING INCINERATION HEAT OF WASTE 失效
公开(公告)号：JPH0979539A
公开(公告)日：1997-03-28
申请号：JP26246295
申请日：1995-09-13
申请人： MITSUBISHI HEAVY IND LTD
发明人： HORIZOE HIROTOSHI , SHIMIZU YOSHIHITO , NAGAI HIROSHI , YASUDA SHIZUO , TAZAWA TATSUO
IPC分类号： F23G5/30 , F22B1/18 , F22G1/16 , F23C10/00 , F23C10/20 , F23G5/00 , F23G5/027 , F23G5/16 , F23G5/32 , F23G5/46 , F23G7/00 , F23J1/00 , F23C11/02
摘要： PROBLEM TO BE SOLVED: To obtain high temperature/high pressure superheated steam while preventing high temperature corrosion of a boiler tube as caused by chlorine. SOLUTION: This superheated steam making apparatus has a thermal decomposition means (for thermal decomposition reaction within a space at a temp. of at least 300 deg.C), a char combustion means, a first steam making means (for obtaining steam at a temp. of at most 400 deg.C) and a second steam making means. The thermal decomposition means 1 is made up of a fluidized bed. Inside the fluidized bed, a main fluidized bed 1A which has a fluid medium 2 such as sand housed on a scattering plate 3 is provided to fluidize the fluid medium preferably by blowing air, a combustion exhaust gas or the like from below the scattering plate 3. The lower side wall side of the main fluidized bed 1A is expanded in width and a conveying means 1C is provided on a bottom part thereof to convey a solid component toward the takeoff of a char mixture from the dumping side of wastes while a sub fluidized bed part 1B is arranged to fluidize the fluid medium by blowing air, the combustion exhaust gas or the like below the conveying means 1C.

25. 发明专利

JP2003166704A STOKER TYPE REFUSE INCINERATOR 审中-公开
公开(公告)号：JP2003166704A
公开(公告)日：2003-06-13
申请号：JP2001363996
申请日：2001-11-29
申请人： MITSUBISHI HEAVY IND LTD
发明人： SHIMIZU YOSHIHITO , HOSHI YONOSUKE , HONDA HIROKI , KITSUTA TAKEHIRO , SUGAI JUNJI
IPC分类号： F23L9/04 , F23G5/00 , F23G5/16 , F23M9/00 , F23M9/04
摘要： PROBLEM TO BE SOLVED: To provide a stocker type refuse incinerator for gasifying and ashing stuff to be incinerated placed on a stoker, while the stuff passes through a drying zone, a combustion zone and an ember combustion zone, and for burning the gasified stuff in a combustion chamber above the stoker, causing the gasifying speed to be low, and suppressing luminous flame formation on the combustion zone and generation of dioxins. SOLUTION: This stoker type refuse incinerator comprises a hopper 11 in which the stuff 10 to be incinerated such as the refuse is thrown, a stoker 12, an ash chute 13, a primary combustion chamber 14 formed in an upper combustion space of the stoker, and a secondary combustion chamber 15 which is continuously provided thereon and has a secondary air supply unit 21. A radiation heat blocking projecting part 18 is provided on the boundary between the primary combustion chamber 14 and the secondary combustion chamber 15, a bypass passage 17a is provided in the secondary combustion chamber 15 from an upper space of the drying zone, and a bypass passage 17b is provided in the secondary combustion chamber 15 from an upper space of the combustion zone 12c. COPYRIGHT: (C)2003,JPO

26. 发明专利

JP2002228126A GASIFICATION MELTING DEVICE 失效
公开(公告)号：JP2002228126A
公开(公告)日：2002-08-14
申请号：JP2001022075
申请日：2001-01-30
申请人： MITSUBISHI HEAVY IND LTD
发明人： HOSHI YONOSUKE , SHIMIZU YOSHIHITO , KAWAI KAZUHIRO
IPC分类号： F23G5/027 , B09B3/00 , C02F11/10 , F23G5/16 , F23G5/30 , F23J1/00
摘要： PROBLEM TO BE SOLVED: To provide a gasification melting device which enables provision of uniform thermal decomposition gas containing a large amount of a combustible content without lowering a heat generation amount and also complicating a system, and enables smooth melting of an ash content. SOLUTION: In the gasification melting device provided with a thermal decomposition furnace to perform thermal decomposition of waste, such as city refuse and sewage sludge, and an ash melting combustion furnace to perform ash melting of particles, such as main ash and fly ash, by utilizing thermal decomposition gas generated in the thermal decomposition, the thermal decomposition furnace is a fluidized bed furnace and low oxygen high temperature air having a temperature of approximately 800 deg.C or higher is used as fluidizing gas fed to the fluidized bed of the fluidized bed furnace. Meanwhile, high temperature low oxygen concentration air having a temperature of 800 deg.C or lower and oxygen concentration of 5-10% is blown in as combustion air for thermal decomposition gas fed in the ash melting combustion furnace.

27. 发明专利

JP2002122305A OPERATION METHOD FOR CIRCULATED FLUIDIZED BED INCINERATOR 失效
公开(公告)号：JP2002122305A
公开(公告)日：2002-04-26
申请号：JP2000314583
申请日：2000-10-16
申请人： MITSUBISHI HEAVY IND LTD
发明人： YAMAUCHI TSUNEKI , HONDA HIROKI , SHIMIZU YOSHIHITO , HENMI MASATOMO , HOTTA TOSHIKAZU
IPC分类号： F23G5/50 , F23C10/02 , F23G5/30
摘要： PROBLEM TO BE SOLVED: To provide an operation method for a fluidized bed incinerator wherein a sand circulation amount is kept at a proper value with ease. SOLUTION: A control section 30 detects hearth section pressure P1 and furnace top pressure P2 respectively with pressure detectors 30a and 30b, and controls the operation such that a pressure difference therebetween ΔP=(P1-P2) falls within a predetermined restriction zone. The control adjust a circulation amount of fluidized sand 10d by any one or a plurality of combinations of (1) a method where a motor 49a that is a driving source of a conveyor 49 to operate a sand return amount; (2) a method for operating a seal pot air amount by controlling openings of dampers 20b, 21b; (3) a method where it controls the openings of the damps 18b, 19b to operate a distribution ratio of primary air 18 and secondary air 19; or (4) a method where it selectively opens any of dampers 22b, 23b, and 24b or controls the openings to operate a supply height of the secondary air 19 and each height amount of the same.

28. 发明专利

JP2001241613A FLUIDIZED BED COMBUSTION APPARATUS 失效
公开(公告)号：JP2001241613A
公开(公告)日：2001-09-07
申请号：JP2000057216
申请日：2000-03-02
申请人： MITSUBISHI HEAVY IND LTD
发明人： HORIZOE HIROTOSHI , TERASAWA YOSHINORI , SATO JUN , SHIMIZU YOSHIHITO , YASUDA SHIZUO
IPC分类号： F23G5/027 , F23C10/24 , F23G5/30
摘要： PROBLEM TO BE SOLVED: To provide a fluidized bed combustion apparatus in which a char mixture transfer equipment is eliminated, which carries the mixture from a pyrolysis furnace to a char combustion furnace, thereby to remove various troubles associated with the transfer of high temperature char mixture, and noncombustible matters discharged from both furnaces are treated with only one equipment for discharge and separation of the noncombustible matters to reduce the installation space and cost. SOLUTION: A pyrolysis furnace and a char combustion furnace is adjoined through a common furnace wall. The inside of the pyrolysis furnace is separated into a first pyrolysis furnace and a second pyrolysis furnace through a partition. While a chart mixture overflowed from the first pyrolysis furnace to the second is pyrolized further in the second pyrolysis furnace, the mixture is advanced from the opening of the common furnace wall into the fluidized bed to burn it in the char combustion furnace. The equipment for dischargeseparation of noncombustible matters is commonly used for the pyrolysis furnace and the char combustion furnace.

29. 发明专利

JP2000002410A METHOD FOR OPERATING FLUIDIZED-BED INCINERATOR AND INCINERATOR 失效
公开(公告)号：JP2000002410A
公开(公告)日：2000-01-07
申请号：JP16892898
申请日：1998-06-16
申请人： MITSUBISHI HEAVY IND LTD
发明人： SHIMIZU YOSHIHITO , HONDA HIROKI , TAGUMA MASAO , GODA AKIHISA , SASAYA SHIRO
IPC分类号： F23G5/50 , F23G5/30
摘要： PROBLEM TO BE SOLVED: To provide a method for operating a fluidize-bed incinerator for high- water-content wastes and such an incinerator that is able to raise a heat capacity of a freeboard in correspondence with a load variation to absorb the variation, use the heat of combustion generated at the freeboard for maintaining the temperature of a sand bed, and thus decrease an auxiliary fuel. SOLUTION: A fluidized-bed incinerator comprises an entraining flow unit 12 for selectively introducing secondary air into a splash region 12b on the surface of a fluidized sand bed of a bubble flowing region 10 formed by primary air from secondary air feed ports 22a, 23a, 24a which consist of a plurality of stages provided at different levels, in order to entrain and transport particles to a freeboard 13 at the upper side thereof. The incinerator further comprises a reflux unit which permits a fluid medium, which has sprung out to the splash region 12b by the secondary air, to be entrained and transported to the outside of the furnace through the freeboard 13 at the upper portion thereof and to be refluxed to the bubble flowing region 10 through a separator 14 and a seal pot 15.

30. 发明专利

JPH11132431A BURNING METHOD OF WASTE AND FLUIDIZED BED WASTE INCINERATOR 失效
公开(公告)号：JPH11132431A
公开(公告)日：1999-05-21
申请号：JP31266797
申请日：1997-10-29
申请人： MITSUBISHI HEAVY IND LTD
发明人： SHIMIZU YOSHIHITO , HONDA HIROKI , GOUDA AKIHISA
IPC分类号： F23G5/50 , F23G5/30
摘要： PROBLEM TO BE SOLVED: To provide a waste incinerator capable of securely preventing bad fluidization from being produced at the low cost by employing inexpensive quartz sand as a fluid medium, and preventing bad fluidization of a fluidized bed from being produced owing to a fluidization prevention material such as salt. SOLUTION: Upon burning waste using a fluidized bed waste incinerator quartz sand is used as a fluid medium constituting a fluidized bed 2 in the incinerator, and temperature in the incinerator is controlled to 700 deg.C to 800 deg.C being less than a melting point of a material that obstructs fluidization of a fluid medium, and further a fluidization gas speed in the incinerator is controlled to 4 m/s or a value close to that value, and furthermore a blown-up state of the fluid medium in the incinerator is monitored or detected and a combustion air amount in response to a blown-up state is fedback to a combustion air supply side for its burning.

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