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1. 发明专利

JPH0747215A METHOD FOR CLEANING OF EXHAUST GAS FROM PRESSURIZED FLUIDIZED BED BOILER 失效
公开(公告)号：JPH0747215A
公开(公告)日：1995-02-21
申请号：JP19448393
申请日：1993-08-05
申请人： HITACHI LTD , BABCOCK HITACHI KK
发明人： KOMURO TAKEO , ARASHI NORIO , MIYADERA HIROSHI
IPC分类号： B01D46/38 , B01D51/04 , F23J15/00
摘要： PURPOSE:To provide a cleaning method for removing with high efficiency acidic gas and dust in exhaust combustion gas from a pressurized fluidized bed boiler. CONSTITUTION:When an exhaust combustion gas 13 exhausted from a pressurized fluidized bed boiler 1 is introduced into a cyclone 7 and it is cleaned by passing an outlet gas of the cyclone through a moving bed dust collector 10, the dust 8 collected by means of the cyclone 7 is made into a particulate matter by hardening it by hydrothermal reaction and the particulate matter is introduced into a moving bed of the dust collector 10. Dust and acidic gas exhausted from the pressurized fluidized bed boiler can be removed thereby highly efficiently in the moving bed part to improve reliability of operation of a power plant with the pressurized fluidized bed boiler.

2. 发明专利

JPH0663359A NITROGEN OXIDES PURIFYING METHOD AND WASTE GAS TREATING DEVICE 失效
公开(公告)号：JPH0663359A
公开(公告)日：1994-03-08
申请号：JP22251392
申请日：1992-08-21
申请人： HITACHI LTD , BABCOCK HITACHI KK
发明人： TATE TAKAHIRO , SAITO YOSHIO , KURODA OSAMU , YAMASHITA HISAO , MIYADERA HIROSHI
IPC分类号： B01D53/94 , B01J29/06 , F01N3/08 , F02B1/04 , B01D53/36
摘要： PURPOSE:To effectively remove nitrogen oxides in waste combustion gas by subjecting hydrocarbon to incomplete combustion with oxygen on a catalyst and allowing the incomplete combustion product to react with nitrogen oxide. CONSTITUTION:Nitrogen oxides in waste combustion gas contg. hydrocarbon, >=0.5vol% oxygen and nitrogen oxides are purified by using a solid catalyst 5. At this time, compound (e.g. crystalline aluminosilicate) having reaction activity by which hydrocarbon is subjected to incomplete combustion with oxygen used as a solid catalyst 5 to subject hydrocarbon to incomplete combustion with oxygen on the catalyst 5, thereby the incomplete combustion product is allowed to react with the nitrogen oxides. And the concentration of hydrocarbon in waste gas at the inlet of the catalyst layer 5 is previously controlled so that the condition of (concentration of carbon atom in hydrocarbon)/(concentration of nitrogen oxide) >=0.1 may be satisfied. Further the concentration of oxygen in waste gas is previously controlled to control the quantity of carbon monoxide formed on the catalyst 5. As a result, the nitrogen oxides in waste combustion gas are effectively removed by using hydrocarbon.

3. 发明专利

JPH05317701A ENGINE EXHAUST PURIFICATION AND ADSORPTIVE AGENT 失效
公开(公告)号：JPH05317701A
公开(公告)日：1993-12-03
申请号：JP15736292
申请日：1992-05-26
申请人： HITACHI LTD , BABCOCK HITACHI KK
发明人： HONCHI AKIO , OGAWA TOSHIO , WATANABE NORIKO , KURODA OSAMU , YAMASHITA HISAO , MIYADERA HIROSHI , ATAGO TAKESHI , HAMADA IKUHISA
IPC分类号： B01D53/02 , B01D53/34 , B01D53/81 , B01D53/94 , B01J20/18 , B01J29/18 , B01D53/36
摘要： PURPOSE:To provide an adsorptive agent with excellent adsorbability to unburnt hydrocarbons exhausted when an engine is started and keeping this performance for a long time. CONSTITUTION:This adsorptive agent is a one wherein the molar ratio of SiO2/Al2O3 for adsorbing unburnt hydrocarbons in an exhaust gas from an engine is at least 15 and at most 30 and the molar ratio of Na2O/Al2O3 is at most 0.2 and this adsorptive agent may contain one or more of platinum, palladium, cobalt, iron, nickel, copper, silver and manganese as an oxidation catalyst, and in addition, an oxide of a rare earth element may be incorporated. Carbon, etc., adhered on the adsorptive agent can be burnt and eliminated thereby by making the adsorptive agent to be an oxidation catalyst.

4. 发明专利

JPH04214102A PULVERIZED COAL BOILER, PULVERIZED COAL BOILER SYSTEM, AND PULVERIZED COAL BURNER 失效
公开(公告)号：JPH04214102A
公开(公告)日：1992-08-05
申请号：JP4157191
申请日：1991-03-07
申请人： HITACHI LTD , BABCOCK HITACHI KK
发明人： KOBAYASHI YOSHINOBU , AZUHATA SHIGERU , MIYADERA HIROSHI , KONO TAKESHI , MORITA SHIGEKI , JINBO TADASHI , HODOZUKA KUNIO , BABA AKIRA , KURAMASU KIMIHARU
IPC分类号： F23C99/00 , F23D1/00
摘要： PURPOSE:To provide a burner structure and a boiler system in which the burner structure and the boiler system are especially suitable for reducing the generation of NOx CONSTITUTION:In a boiler system in which a pulverized coal burner is provided on the side wall of a fire furnace, a burner is constituted so as to distribute the pulverized coal concentration in the mixture flow of the pulverized coal blown out of a pulverized coal blow-out port and the primary air higher in the outside and lower in the center of the mixture flow. The reduction area of NOx can be extended and NOx can be reduced by blowing out the pulverized coal with a distribution of its concentration. The easiness of ignition can be improved and the combustion efficiency at a low load can be improved.

5. 发明专利

JPH01290591A VAPOR-PHASE SYNTHESIZING METHOD FOR DIAMOND 失效
公开(公告)号：JPH01290591A
公开(公告)日：1989-11-22
申请号：JP11683388
申请日：1988-05-16
申请人： HITACHI LTD , BABCOCK HITACHI KK
发明人： SAITO YUKIO , SATO YASUSHI , TANAKA HIDEAKI , MIYADERA HIROSHI , FURUE TOSHIKI
IPC分类号： C30B29/04
摘要： PURPOSE:To synthesize high-purity diamond at high velocity by making a gaseous mixture of oxygen-contg. but carbon-unincorporating inorganic gas and gaseous hydrogen to a plasma state and mixing gaseous hydrocarbon with the gaseous mixture and bringing the obtained gaseous mixture into contact with a heated base plate. CONSTITUTION:A gaseous mixture 1 of hydrogen and water is introduced into the upper part of a reaction pipe 2 reduced by a vacuum pump 13. This gaseous mixture 1 is excited in a reaction pipe 2 with microwave sent through a waveguide 6 from a microwave oscillator 3 and plasma 7 of the gaseous mixture is formed. Gaseous methane 8 is introduced into the reaction pipe 2 through the fine holes 10 in the downstream side of plasma 7. This gaseous methane is decomposed in the upper part of a base plate 11 and methyl radical, etc., are produced. The methyl radical, etc., are adhered to the base plate 11 and thereafter furthermore decomposed and diamond and graphite are produced. Since graphite is allowed to easily react with hydrogen radical and hydroxyl radical, it is selectively removed and diamond remains.

6. 发明专利

JPS63226513A ATOMIZER 失效
公开(公告)号：JPS63226513A
公开(公告)日：1988-09-21
申请号：JP1255087
申请日：1987-01-23
申请人： HITACHI LTD , BABCOCK HITACHI KK
发明人： KOBAYASHI YOSHINOBU , AZUHATA SHIGERU , NARATO KIYOSHI , INADA TORU , SOMA KENICHI , ARASHI NORIO , MIYADERA HIROSHI
IPC分类号： F23D11/38 , B05B7/04 , B05B7/14
摘要： PURPOSE:To permit the supply of fuel, including solid particles such as coal, water slurry (CWM) or the like, into a mixing chamber under the condition of atomization fine particles, by a method wherein either one fluid of the fuel, flowing through a mixing prechamber, having an annular section, in the state of a thin film, or atomization medium is injected into the other fluid. CONSTITUTION:A mixing prechamber 12 communicates with a CWM supplying passage 5 through a CWM flow passage 3b. When atomizing medium is injected into CWM, flowing through the mixing prechamber 12 from upstream side to downstream side, an atomized medium supplying port 10b is provided with a direction, in which the injecting direction of atomizing medium, injected into the mixing prechamber 12, has a component along the flow direction of the CWM, another component orthogonal to the direction of the same and the other component along the tangential line with respect to the large diametral inner peripheral wall 12b. Further, the atomizing medium supplying port 10b is directed to aime at the part of downstream side of a small diametral inner peripheral wall 12a or a downstream end side small diametral inner peripheral wall surface 12a1. Accordingly, the CWM, flowing in the state of liquid film, is split effectively by the force and moment of turbulence due to turbulent flow caused by the atomizing medium which flows in a high speed, whereby atomized fuel may be prevented from producing rough particles.

7. 发明专利

JPS59176391A Coal gasifying oven 失效
标题翻译：煤炭气化炉
公开(公告)号：JPS59176391A
公开(公告)日：1984-10-05
申请号：JP5049683
申请日：1983-03-28
申请人： Babcock Hitachi Kk , Hitachi Ltd
发明人： MORIHARA ATSUSHI , KOYAMA SHIYUNTAROU , MATSUO MITSUHIRO , MIYADERA HIROSHI , TOMURO JINICHI , NOKITA SHIYUNSUKE , NOGUCHI YOSHIKI , HISHINUMA TAKAO
IPC分类号： C10J3/46 , C10J3/48
CPC分类号： C10J3/466 , C10J3/485 , C10J3/487 , C10J2300/093 , C10J2300/0959 , C10J2300/1846 , Y10S48/04
摘要： PURPOSE: To increase the efficiency of gasification of coal in a coal gas liquefaction apparatus which employs a double jet layer, by reducing the diameter of a discharge opening and providing two specially designed burners to the reactor wall.
CONSTITUTION: A produced gas discharge opening 2 and a slag discharge opening 11 having a diameter smaller than that of a gasification reaction zone 8 formed in a container 3 (4 is heat insulating material) are provided at the top and bottom of the gasification reaction zone 8 respectively. Upper burners 7, 7 and a lower burner 9 for introduction of dust coal and a gasifying agent are attached to the wall of the container 3 (and the heat insulating material 4) so that dust coal, etc. may be blown in a tangential direction to imaginary circles A and B assumed in the gasification reaction zone 8 and the imaginary circle A for the upper burner 7 may have a diameter larger than that of the imaginary circle B for the lower burner 9 (13 is a layer of water to cool discharged slag; 12 is an inlet for cooling water; 14 is an outlet for cooling water).
COPYRIGHT: (C)1984,JPO&Japio
摘要翻译：目的：通过减小排放口的直径，并向反应器壁提供两个特别设计的燃烧器，提高采用双层喷射层的煤气液化装置中煤的气化效率。构成：在气化反应区域的顶部和底部设置有形成在容器3（4为绝热材料）中的气化反应区8的直径小于直径的产生气体排出口2和排渣口11 8。上部燃烧器7,7和用于引入粉尘煤和气化剂的下部燃烧器9附接到容器3（和隔热材料4）的壁上，使得灰尘等可以沿切线方向吹在气化反应区8中假设的假想圆A和B以及用于上部燃烧器7的假想圆A的直径可以比下部燃烧器9的假想圆B的直径大（13是一层水冷却排出炉渣; 12是用于冷却水的入口; 14是用于冷却水的出口）。

8. 发明专利

JPH05285387A 失效
公开(公告)号：JPH05285387A
公开(公告)日：1993-11-02
申请号：JP11843992
申请日：1992-04-13
申请人： HITACHI LTD , BABCOCK HITACHI KK
发明人： WATANABE NORIKO , KURODA OSAMU , YAMASHITA HISAO , HONCHI AKIO , OGAWA TOSHIO , MIYADERA HIROSHI , ATAGO TAKESHI , HAMADA IKUHISA
IPC分类号： B01D53/94 , B01J23/56 , B01J23/63 , B01J35/02 , B01D53/36
摘要： PURPOSE:To provide a catalyst for rapid oxidation of CO and hydrocarbon contained in large quantities in exhaust gas from an engine immediately after start and a method for purifying exhaust gas. CONSTITUTION:This catalyst for purification of exhaust gas supported on a carrier contains 0.5-10g/l palladium and 10-150 gel (expressed in terms of CeO2) cerium as active components. When this catalyst is disposed at the upsteam side 3 of exhaust gas 2 from an engine 1, exhaust gas contg. CO and hydrocarbon at high concn. from the engine 1 immediately after start is rapidly burned at a low temp. and a ternary catalyst 4 is rapidly heated. The CO is ignited at a low temp. and the CO and hydrocarbon can rapidly be burned at a low temp.

9. 发明专利

JPS63251498A METHOD FOR STABILIZING COAL-WATER SLURRY AT LOW VISCOSITY 失效
公开(公告)号：JPS63251498A
公开(公告)日：1988-10-18
申请号：JP8479587
申请日：1987-04-08
申请人： HITACHI LTD , BABCOCK HITACHI KK
发明人： KAJI RYUICHI , MURANAKA TADASHI , KIKUCHI HIDEO , SAITO KAZUICHI , MIYADERA HIROSHI
IPC分类号： C10L1/32 , C10L10/18
摘要： PURPOSE:To stably maintain a coal-water slurry in a low viscosity state, by adding an alkali metal salt of silicate or carbonate ion in an amt. corresponding to the amt. detected with respect to Ca and Mg contained in a coal-water slurry. CONSTITUTION:A coal-water slurry comprising at least 60wt.% coal and 0.2-2wt.% (base on dried coal) anionic surfactant with the balance being water and having a pH value of 6-11 and a viscosity of 3,000cP or less is stored in a storage tank 1 and circulated through a pipe 3 by means of a pump 2 and further agitated with an agitator 4. The concns. of Ca and Mg contained in a tank 1 are continuously or intermittently detected with an ion electrode 5 and a detector 6. An alkali metal salt of a silicate or carbonate ion in an amt. sufficient for converting Ca and Mg into a insoluble salt thereof is poured into the tank 1 from a tank 9 by means of a pump 8.

10. 发明专利

JPS63140208A PULVERIZED COAL BURNER 失效
公开(公告)号：JPS63140208A
公开(公告)日：1988-06-11
申请号：JP28628786
申请日：1986-12-01
申请人： HITACHI LTD , BABCOCK HITACHI KK
发明人： AZUHATA SHIGERU , SUDO KIYOSHI , SOMA KENICHI , KOBAYASHI YOSHINOBU , MASUTANI MASAO , INADA TORU , ARASHI NORIO , MIYADERA HIROSHI , MORITA SHIGEKI
IPC分类号： F23D1/00
摘要： PURPOSE:To promote the ignition of pulverized coal by a method wherein a pulverized coal nozzle and a secondary air nozzle are installed coaxially and the cross sectional area of a secondary air passage in the secondary air nozzle is formed eccentrically with reference to a coaxial center. CONSTITUTION:A pulverized coal nozzle 16 has an elliptical cross sectional shape, and thereby the cross sectional area of a secondary air passage in a secondary air nozzle is formed eccentrically with reference to a coaxial center. At the tip of the nozzle 16 a diffuser-shaped flame holding device 21 is placed. At the center of a burner 10 an auxiliary fuel nozzle 15 burning auxiliary fuel is attached. Thus, the secondary and tertiary air are spouted into a combustion chamber 11 as circular ring-shaped jet streams from the nozzle 17 and a tertiary air nozzle 18. On the other hand, pulverized coal is spouted as an elliptical jet stream from the elliptical nozzle 16. Thereby, the mixing of the secondary air having an air flow rate necessary for ignition at the optimum condition and the pulverized coal near the outlet of the burner 10 is promoted.

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