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11. 发明专利

JPS56141820A FLUE GAS DENITRIFICATION METHOD 失效
公开(公告)号：JPS56141820A
公开(公告)日：1981-11-05
申请号：JP4516980
申请日：1980-04-08
申请人： MITSUBISHI HEAVY IND LTD
发明人： SETO TOORU , UGAWA NAOHIKO , SUZUMURA HIROSHI , HINO MASAO , HANEDA MICHIO
IPC分类号： B01D53/94
摘要： PURPOSE:To prevent deterioration of catalyst activity, by drawing part of a flue gas effluent from a denitrification reactor through a fan when boiler load is low, and refeeding it to the gas flow entering the reactor. CONSTITUTION:Waste gas 2 exhausted from an economizer of boiler 1 is denitrified by adding NH3 8 as a reductant to the branched flow of waste gas 3, and feeding waste gas 4 with an NH3 concentration controlled to the inlet of denitrification catalyst layer 9. When boiler load is low such as at night, the NH3 concentration in gas 5 entering layer 9 is lowered by drawing part 7 of outlet gas 6 with blower 10 and returning it to the inlet of layer 9, thus permitting catalyst life to be extended effectively and economically.

12. 发明专利

JPS56126435A LEAK AMMONIA CONTROL METHOD IN DRY TYPE STACK GAS DENITRATION APPARATUS 失效
公开(公告)号：JPS56126435A
公开(公告)日：1981-10-03
申请号：JP3005380
申请日：1980-03-10
申请人： MITSUBISHI HEAVY IND LTD
发明人： FUKUMOTO KATSUTOSHI , HINO MASAO
IPC分类号： B01D53/56 , B01D53/74
摘要： PURPOSE:To reduce the amount of leaking NH3 by calculating the temp. gradient of an NOx-contg. waste gas and so controlling the same that it does not rise above the specific value in reducing said waste gas with NH3 and denitrating the same. CONSTITUTION:The NOx-contg. waste gas produced in a combustion furnace 1 is introduced via a duct 2 into a denitration apparatus 3, where it is mixed with NH3, whereby NOx is reduced to N and the gas is denitrated. In this case, the temp. of the waste gas is detected with a detector 5, and is differntiated with a differentiator 6, which in turn emits a temp. gradient signal. This signal is inputted to a temp. gradient controller 7. The controller 7 calculates an operation signal so as to prevent the temp. gradient signal from rising above the prescribed value, and outputs this to a damper 10 which controls the flow rate of the air or waste gas flowing in a duct 9 and adds the same into the waste gas duct. Since the changing rate of the waste gas temp. at the inlet of the denitration apparatus 3 is suppressed, the concn. of the leaking NH3 at the outlet of the apparatus 3 does not increase and the stable denitration operation is accomplished.

13. 发明专利

JPS5688829A TREATMENT OF TUNGSTENNCONTAINING COMPOSITION 失效
公开(公告)号：JPS5688829A
公开(公告)日：1981-07-18
申请号：JP16509279
申请日：1979-12-19
申请人： MITSUBISHI HEAVY IND LTD
发明人： HINO MASAO , MITSUOKA SHIGEAKI
IPC分类号： B01D53/94 , B01D53/86 , B01J23/30 , C01G23/00 , C01G31/00 , C01G41/00
摘要： PURPOSE:A catalyst containing titanium dioxide, divanadium pentoxide and tungsten sesquioxide is brought into contact with an oxalic acid solution and a sulfuric acid solution to remove vanadium and then with a sodium hydroxide solution to remove tungsten, thus recovering these valuable components readily. CONSTITUTION:After used, a catalyst composition containing titanium dioxide, divanadium pentoxide and tungsten sesquioxide, which is applied to the catalytic denitrification using ammonia as a reducing agent, is treated with an oxalic acid soltion and/or sulfuric acid solution. The oxalic acid and sulfuric acid remove divanadium pentoxide according to equations I and II and equation III respectively. After extraction of divanadium pentoxide, the treatment with a sodium hydroxide solution causes the reaction of equation IV and the tungsten sesquioxide is shifted into the liquid phase, resulting in efficient separation from titanium dioxide. Thus, the active components, divanadium pentioxide and tungsten sesquioxide, are separated and the remaining titanium dioxide is separated from the carrier physically.

14. 发明专利

JPS5416394A DENITRATION OF CATALYST REGENERATING METHOD 失效
公开(公告)号：JPS5416394A
公开(公告)日：1979-02-06
申请号：JP8101777
申请日：1977-07-08
申请人： MITSUBISHI HEAVY IND LTD
发明人： HINO MASAO , MITSUOKA SHIGEAKI
IPC分类号： B01D53/94 , B01D53/34 , B01D53/86 , B01D53/96 , B01J23/22 , B01J23/90 , B01J23/92 , B01J38/04 , C01B21/02
摘要： PURPOSE:To regenerate deactivated denitration catalyst consisting of metal oxides supported on SOx resistant carrier, by bringing the catalyst used in reduction with NH3 into contact with a NO-contg. gas at a relatively low temp. so as to thoroughly remove poisonous substances from the catalyst surface.

15. 发明专利

JPS546859A DENITRATING METHOD FOR EXHAUST GAS CONTAINING CO 失效
公开(公告)号：JPS546859A
公开(公告)日：1979-01-19
申请号：JP7305677
申请日：1977-06-20
申请人： MITSUBISHI HEAVY IND LTD
发明人： NISHIMOTO KOREHIKO , HINO MASAO , SUWA MASATO , TAKEUCHI TADAO
IPC分类号： B01D53/94 , B01D53/34 , F23J15/00
摘要： PURPOSE:To reduce the cost of fuel for heating the gas to be treated with the effective recovery of the heat of combustion of CO, by burning CO in the exhaust gas from which NOx has been removed by being reduced with NH3 on the oxidation catalyst and by utilizing this heat of combustion for the reduction of NOx.

16. 发明专利

JPS53100983A PRODUCTION OF EXHAUST GAS TREATMENT CATALYST 失效
公开(公告)号：JPS53100983A
公开(公告)日：1978-09-02
申请号：JP1563277
申请日：1977-02-16
申请人： MITSUBISHI HEAVY IND LTD , OSAKA PATSUKINGU SEIZOUSHIYO K
发明人： YOKOYAMA SHIGEO , HINO MASAO , FUJITA HIROSHI , SERA TOSHIKUNI , TAKAHASHI TERU
IPC分类号： B01D53/94 , B01D53/34 , B01J21/16 , B01J23/02 , B01J23/20 , B01J23/24 , B01J23/32 , B01J27/053 , B01J37/00 , C01B21/02
摘要： PURPOSE:To produce a catalyst with high bending strength for denitration of dust-contg. exhaust gas by adding a specified amt. of CaSO4 to a slurry of calcium silicate crystals obtd. by heating a mixt. of raw materials for silicic acid and lime and water under reduced press. followed by molding, drying and supporting of a catalyst component.

17. 发明专利

JPS5315285A PRODUCTION OF CATALYST 失效
公开(公告)号：JPS5315285A
公开(公告)日：1978-02-10
申请号：JP9062276
申请日：1976-07-29
申请人： MITSUBISHI HEAVY IND LTD
发明人： OGAWA HIROSHI , HINO MASAO , FUJITA HIROSHI
IPC分类号： B01D53/94 , B01D53/34 , B01J27/02 , B01J27/053 , B01J35/02 , B01J37/00 , C01B21/02
摘要： PURPOSE:To prevent a hardened product from cracking by coating a metallic structure which tends to expand with a combustible substance, attaching a hydraulic material to the structure used as a core or reinforcement, and hardening and calcining the hydraulic material.

18. 发明专利

JPS52111873A TREATMENT OF EXHAUST GAS NITROGEN OXIDES 失效
公开(公告)号：JPS52111873A
公开(公告)日：1977-09-19
申请号：JP2863876
申请日：1976-03-18
申请人： MITSUBISHI HEAVY IND LTD
发明人： OGAWA HIROSHI , HINO MASAO , SERA TOSHIKUNI
IPC分类号： B01D53/94 , B01D53/34 , B01J23/22 , B01J23/24 , B01J23/26 , B01J23/28 , B01J23/30 , B01J23/72 , B01J23/74 , B01J23/745 , B01J23/84 , B01J27/02 , B01J27/053 , B01J27/055 , C01B21/02
摘要： PURPOSE:To reduce NOx in exhaust gas to harmless nitrogen in the presence of NH3 by use of catalyst consisting of catalytically active metallic oxide carried by prous hard material made from hemihydrate gypsum and alumina.

19. 发明专利

JPS5266890A METHOD OF PRODUCING CARRIER FOR NOX SELECTIVE REDUCTION CATALYST 失效
公开(公告)号：JPS5266890A
公开(公告)日：1977-06-02
申请号：JP14221975
申请日：1975-12-01
申请人： MITSUBISHI HEAVY IND LTD
发明人： NISHIMOTO KOREHIKO , YOKOYAMA SHIGEO , OGAWA HIROSHI , HINO MASAO
IPC分类号： B01D53/94 , B01D53/34 , B01J21/04 , B01J35/10
摘要： PURPOSE:To produce a catalyst carrier for selectively reducing NOx in exhaust gas in the presence of NH3 as a reducing agent byg ranulating raw materail beehmite and a binder and calcining the granules.

20. 发明专利

JPH10277361A METHOD FOR TREATING DESULFURIZING/ABSORBING SOLUTION AND TREATING DEVICE 失效
公开(公告)号：JPH10277361A
公开(公告)日：1998-10-20
申请号：JP34602497
申请日：1997-12-16
申请人： MITSUBISHI HEAVY IND LTD
发明人： IWASHITA KOICHIRO , SHINODA TAKEO , ONIZUKA MASAKAZU , HINO MASAO , INOUE KENJI
IPC分类号： B01D53/34 , B01D47/06 , B01D53/14 , B01D53/50 , B01D53/77 , B03D1/24 , C02F1/24
摘要： PROBLEM TO BE SOLVED: To efficiently remove a microparticle such as an unburnt carbon from a desulfurizing/ absorbing solution prior to the separation of a byproduct by supplying a gas into the absorbing solution containing the microparticle and thereby causing the generation of a bubble phase through allowing the microparticle to stick to the surface of the bubble and further, breaking the bubble phase to obtain a liquid containing the microparticle. SOLUTION: A gas C such as a nitrogen gas is supplied into a desulfurizing/absorbing solution A to be stored as a liquid B from supply piping 2. Further, a microparticle such as an unburnt carbon contained in the liquid B is collected as a bubble to the inner periphery of the bubble. Next, the bubble is moved upward to form a bubble phase D made up of the bubble above the liquid level of the liquid B in the treatment tank 1. The bubble phase D flows into a bubble breaking tank 16 located across a partition 9 through a bubble introducing pipe 10, and then is broken separately by a bubble breaking means 11 into a liquid E containing the microparticle such as the unburnt carbon and an off-gas F. After that, the broken bubble liquid E is drained to the outside of the treatment system through an overflow pipe 12. Thus it is possible to enhance the purity of a byproduct such as gypsum obtained by separating the desulfurizing/absorbing solution into a solid matter and a liquid and also minimize the degree of coloring.

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