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1. 发明专利

JPS60156532A WET TYPE STACK GAS DESULFURIZATION PROCESS 失效
公开(公告)号：JPS60156532A
公开(公告)日：1985-08-16
申请号：JP1184784
申请日：1984-01-27
申请人： HITACHI LTD , BABCOCK HITACHI KK
发明人： KOMURO TAKEO , KAJI RIYUUICHI , ARASHI NORIO , OOTSUKA KEIZOU
IPC分类号： B01D53/50 , B01D53/34 , B01D53/77 , C01F11/46
摘要： PURPOSE:To realize effective absorption of gaseous SO2 and to reduce consumption of excess H2SO4 by pulverizing elemental particles (consisting essentially of CaSO3) in a liquid suspension with a wet type crusher. CONSTITUTION:Liquid suspension 102 in a liquid reservoir 102 of an absorption tower 100 is combined with a liquid suspension 4 of CaSO3 to be supplemented corresponding to the load of gaseous SO2 in waste combustion gas, and the mixture is fed to a wet type crushing mill 104 to pulverize the elemental particles of CaSO3, and the combined liquid suspension is further fed to the liquid reservoir 102 and a gas/liquid contact section 101 through a circulating pump 105. By this treatment, the elemental particles in the liquid reservoir 102 and coarse particles of supplemented CaSO3 are pulverized, accordingly, the amt. of CaSO3 to be supplemented to the system can be reduced and the amt. of H2SO4 to be fed from a stream 12 can be also reduced.

2. 发明专利

JPS58149995A FROTH-FLOTATION DEASHING OF COAL 失效
公开(公告)号：JPS58149995A
公开(公告)日：1983-09-06
申请号：JP3242182
申请日：1982-03-03
申请人： HITACHI LTD , BABCOCK HITACHI KK
发明人： MURANAKA TADASHI , KAJI RIYUUICHI , KIKUCHI HIDEO , AKIMOTO HIDETOSHI , OOTSUKA KEIZOU
IPC分类号： C10L1/32 , C10L9/00
摘要： PURPOSE:To increase deashing and deashed coal recovery rates by controlling the bubble size of oil vapor froth within a specified range by adjusting the amt. of an added frother, peripheral speed of an atomizer, etc. in deashing coal by oil vapor flotation. CONSTITUTION:Oil 7 having affininty to carbonaceous matter in coal is pumped to an evaparator 9 by a pump 8 and the produced oil vapor is supplied to the bottom of a deashing column 1 by a compressor 6. the oil vapor is disintegrated into minute bubble by an atomizer 4 and is raised through a slurry 2 consisting of crushed coal, water and a frother to entrain and float the carbonaceous matter in the coal, which is recovered as deashed coal from the top of the column 1. At that time, the deashing and deashed coal recovery rates are increased by controlling the amt. of the added frother and peripheral speed of the atomizer atomizing the vapor so as to form a 0.4-0.8mm. diameter bubble.

3. 发明专利

JPS5818013A COMBUSTION METHOD OF COAL-WATER SLURRY FUEL 失效
公开(公告)号：JPS5818013A
公开(公告)日：1983-02-02
申请号：JP11641581
申请日：1981-07-27
申请人： HITACHI LTD , BABCOCK HITACHI KK
发明人： KAJI RIYUUICHI , HISHINUMA TAKAO , NAKAJIMA FUMITO , MURANAKA TADASHI , AKIMOTO HIDETOSHI
IPC分类号： F23B99/00 , F23K1/04
摘要： PURPOSE:To improve thermal efficiency and combustion efficiency, by eliminating a heat loss resulting from water content, in a combustion method of coal- water slurry fuel. CONSTITUTION:Coal-water slurry fuel kept in a tank 2 is sprayed on a spray dryer 5 from a nozzle 4 through a pump 3. The coal is dried by exhaust gas led from a boiler 1 and sent to a cyclone scrubber 6. The collected coal is carried to the boiler 1 by means of air current transportation through compressed air from a blower 7 for combustion. Combustibility of the coal collected at the scrubber 6 is improved further if it is sent by the air current transportation after it is atomized by a crusher.

4. 发明专利

JPS57174394A COAL SLURRY COMPOSITION 失效
公开(公告)号：JPS57174394A
公开(公告)日：1982-10-27
申请号：JP5984281
申请日：1981-04-22
申请人： HITACHI LTD , BABCOCK HITACHI KK
发明人： AKIMOTO HIDETOSHI , MURANAKA TADASHI , KOMURO TAKEO , KAJI RIYUUICHI , HISHINUMA TAKAO , NAKASHIMA FUMITO
IPC分类号： C10L1/32 , C10L5/00
摘要： PURPOSE:A coal slurry composition of low water content easily transportable and suitable as a fuel, which is prepd. by adding an unburned carbon particle formed by the combustion of a carbonaceous material to a slurry consisting of crushed coal and water. CONSTITUTION:A fine unburned carbon particle formed by the combustion of a carbonaceous material is added to a slurry consisting of crushed coal and water. The fine particle used is carbonaceous and is not only effective for slurrying coal in high concn. but also harmless for the combustion of the slurry because it is combustible. The fine particle is, e.g., unburned carbon formed by the combustion of a hydrocarbon such as fuel oil, naphtha, diesel oil or gasoline. For example, an unburned carbon particle formed by the combustion of fuel oil has prticle size

5. 发明专利

JPS57128791A REMOVAL OF ASH FROM COAL 失效
公开(公告)号：JPS57128791A
公开(公告)日：1982-08-10
申请号：JP1424581
申请日：1981-02-04
申请人： HITACHI LTD , BABCOCK HITACHI KK
发明人： KOMURO TAKEO , KAJI RIYUUICHI , MURANAKA TADASHI , HISHINUMA TAKAO , NAKASHIMA FUMITO , KAKO HIROYUKI
IPC分类号： C10L9/00 , C10L5/00
摘要： PURPOSE:To remove ash from coal in high efficiency, by adding an oil to a slurry of fine powder coal/water, applying ultrasonic to the interface of the slurry solution or the oil so that carbon material in the slurry is attached to oil drops and concentrated, concentrating ash in the water phase. CONSTITUTION:For example, an oil such as kerosine, etc. from the tank 1 is pressurized by the pump 2, fed as oil drops from the flow 10 to the cylinder 3 containing the water slurry 6 of fine powder coal having

6. 发明专利

JPS56100621A IMPROVEMENT OF PERFORMANCE OF STACK GAS DESULFURIZATION APPARATUS 失效
公开(公告)号：JPS56100621A
公开(公告)日：1981-08-12
申请号：JP128380
申请日：1980-01-11
申请人： HITACHI LTD , BABCOCK HITACHI KK
发明人： KAJI RIYUUICHI , ARASHI NORIO
IPC分类号： B01D53/50 , B01D53/34 , B01D53/77 , C01F11/46
摘要： PURPOSE:To provide the desulfurization performance which is stable against the change in the pH of an absorbing liquid slurry by blowing air into the absorbing liquid having lowered pH by absorbing gaseous SO2 in an absorption column, thereby oxidizing sulfurous acid radicals to sulfuric acid radicals. CONSTITUTION:The limestone slurry absorbing liquid cooled in a cooling column is supplied into an absorption column 2. In the column 2, it is allowed to make gas- liquid contact between the absorbing liquid and exhaust gases, whereby the sulfurous acid gas in the gases is converted into calcium sulfite. The absorbing liquid having lowered pH to 4-5 as the result of absorption of SO2 gas is mixed with air by using an ejector 6 or the like, whereby calcium sulfite is oxidized to calcium sulfate. Alternatively, it is also possible to carry out oxidation by providing a perforated plate 5 to the upper part of a circulating tank 4, attenuating the mixed flow owing to the stirrer 7 in the tank 4, once storing the absorbing liquid just after emitting from the column 2 in the upper part of the tank 4 and mixing air into this absorbing liquid with the ejector 6 or the like.

7. 发明专利

JPS5573363A GAS SUPPLY OF TWOOFLUID NOZZLE 失效
公开(公告)号：JPS5573363A
公开(公告)日：1980-06-03
申请号：JP14656378
申请日：1978-11-29
申请人： HITACHI LTD , BABCOCK HITACHI KK
发明人： KAJI RIYUUICHI , HISHINUMA TAKAO
IPC分类号： B05B7/04 , B05B7/06
摘要： PURPOSE:To reduce the running cost of an apparatus and to carry out effectively the atomization of absorbed liquid in th apparatus for treating high temperature gas by atomizing the liquid with vapor of a liquid having lower boiling point than the temperature of the gas. CONSTITUTION:The structure of nozzle used is the same as that of conventional two-fluid nozzle. A pipe 3 through which absorbed liquid 5 is transferred to a nozzle 3, is a double-pipe. The internal pipe 2 is used for transporting the absorbed liquid. Cooling water flows through the external pipe 1, thereby the boiling of the absorbed liquid within the pipe and the nozzle 3 is prevented. As the cooling water flowing through the external pipe 1 approaches the nozzle 3 within an absorption tower 4, the temperature rises, because the cooling water is contacted with high temperature gas. The cooling water boils, evaporates and turns into gas. As a result, volume is greatly increased, velocity at the tip of the nozzle is increased and the adsorbed liquid is atomized at the jetting port.

8. 发明专利

JPS5391074A DESULFURIZATION AND DENITRATION METHOD 失效
公开(公告)号：JPS5391074A
公开(公告)日：1978-08-10
申请号：JP582677
申请日：1977-01-24
申请人： HITACHI LTD , BABCOCK HITACHI KK
发明人： TAKAHASHI SADAO , AKIMOTO HIDETOSHI , KAJI RIYUUICHI , HISHINUMA TAKAO , ARIKAWA KIJIROU
IPC分类号： B01D53/60 , B01D53/02 , B01D53/14 , B01D53/34 , B01D53/77 , C01B21/24
摘要： PURPOSE:To maintain high desulfurization and denitration rate extending over a long term, by contacting exhaust gas contained SO2 and NO, with mixed solution of ferrous EDTA complex and active carbon and removing NO and moreover, reducing oxidized ferric EDTA by SO2 in exhaust gas.

9. 发明专利

JPS5389882A REDUCING METHOD FOR FERRIC EDTA COMPLEX IN WET DENITRATION 失效
公开(公告)号：JPS5389882A
公开(公告)日：1978-08-08
申请号：JP389277
申请日：1977-01-19
申请人： HITACHI LTD , BABCOCK HITACHI KK
发明人： KAJI RIYUUICHI , AKIMOTO HIDETOSHI , HISHINUMA TAKAO , TAKAHASHI SADAO
IPC分类号： B01D53/14 , B01D53/34 , B01D53/56 , B01D53/77
摘要： PURPOSE:To increase absorption ratio of a absorption soln. and to keep NO removal ratio at a high level for a long time by reduction of ferric EDTA complex contained in a denitration absorption soln. formed by oxidation with O2 contained in flue gas to ferrous EDTA complex in the presence of KI.

10. 发明专利

JPS5290462A REMOVAL OF NITROGEN OXIDES 失效
公开(公告)号：JPS5290462A
公开(公告)日：1977-07-29
申请号：JP666076
申请日：1976-01-26
申请人： HITACHI LTD , BABCOCK HITACHI KK
发明人： HISHINUMA TAKAO , AKIMOTO HIDETOSHI , KAJI RIYUUICHI , ARIKAWA KIJIROU
IPC分类号： B01D53/14 , B01D53/34 , B01D53/56 , B01D53/77 , C02F1/58
摘要： PURPOSE:To permit NO-containing gas to be absorbed in an aqueous solution containing sulfite ions and be subjected to decomposition treatment with the use of an acid agent containing halogen whereby NO in the absorbing solution is converted to harmless N2 gas.

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