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1. 发明专利

JPH06114391A TREATMENT OF WASTE WATER 失效
公开(公告)号：JPH06114391A
公开(公告)日：1994-04-26
申请号：JP29084592
申请日：1992-10-05
申请人： NIPPON KOKAN KK
发明人： YAMAMOTO MASAAKI , MIYAKE MINORU , MAKI AKIRA , YAMATE YOSHITOMO , KOYAMA KAZUHIDE , MAEDA KOZO
IPC分类号： C02F3/12 , G01N33/18
摘要： PURPOSE:To stabilize activated sludge in waste water by quantitatively measuring the states of filamentous bacteria and agglutinative bacteria contained in activated sludge in waste water by an image processor and controlling the characteristics of both bacteria on the basis of the measured result. CONSTITUTION:The image of activated sludge is automatically measured at every 10min to 1hr by the submerged microscope 4b arranged in an aeration tank 1 and image processing and operation are executed by an image processor 5 and an operation device 6. By the image processing, the predetermined items related to filamentous bacteria and agglutinative bacteria in the bacteria constituting activated sludge, that is, the length of filamentous bacteria and the area, brightness, area distribution and brightness distribution of agglutinative bacteria are measured and the measured data are introduced into the operation device 6 and operation judgment is performed on the basis of the knowledge base of the device 6. From the judge results, the characteristics of filamentous and agglutinative bacteria are controlled by the alteration of the setting of an inflow water flow rate and an aeration air amt. and the activated sludge in waste water can be stabilized.

2. 发明专利

JPH03138535A INTERFACE DETECTOR FOR TAR DECANTER 失效
公开(公告)号：JPH03138535A
公开(公告)日：1991-06-12
申请号：JP27655689
申请日：1989-10-24
申请人： NIPPON KOKAN KK
发明人： WATANABE YOSHIAKI , MIYAKE MINORU , YAMAMOTO MASAAKI , HIROSHIGE SHIGEKI , BODA KOSAKU , KOBAYASHI MASAJI
IPC分类号： G01F23/00 , G01N9/36
摘要： PURPOSE:To easily and securely detect the interfaces of respective layers of ammonia liquor, emulsion of ammonia liquor and tar, and tar in the tar decanter by measuring the specific gravity values of the ammonia liquor, tar, and emulsion of the ammoniacal liquor and tar in the tar decanter by a specific gravity detector continuously at constant intervals of time. CONSTITUTION:A rotating means 7 rotates a sampling nozzle 6 to sample liquid in the tar decanter 1 from the nozzle 6 at constant intervals of time. This liquid enters a pot 16 temporarily and is sent from the pot to the specific gravity detector 9 to measure the specific gravity values of the ammonia liquor 4, tar 3, and emulsion 5 of the ammonia liquor and tar in the tar decanter 1 continuously at constant intervals of time. Then the liquid is discharged into pit 17 from the detector 9. Then the interface detector 10 detects the interface between the ammonia liquor 4 and emulsion 5 and the interface between the emulsion 5 and tar 3 according to the tip position signal of the nozzle 6 from a rotational position detector 8 and the specific gravity signal from the detector 9.

3. 发明专利

JPH0881215A PRODUCTION OF GRANULAR AMMONIUM SULFATE 失效
公开(公告)号：JPH0881215A
公开(公告)日：1996-03-26
申请号：JP21682794
申请日：1994-09-12
申请人： NIPPON KOKAN KK
发明人： MIYAKE MINORU
IPC分类号： C01C1/24
摘要： PURPOSE: To make continuous liquid circulation between two steps of absorption and crystallization unnecessary by suppressing free sulfuric acid concentration in the mother liquor of ammonium sulfate in a method for producing ammonium sulfate from ammonium in gas of a coke oven. CONSTITUTION: Two spray type saturating towers 2 and 3 are provided in series in an adsorption step. A part of a coke oven gas reacted in the first saturating tower 2 is again reacted with a part of mother liquor of ammonium sulfate in the second saturating tower 3. When the concentration of free sulfuric acid in the mother liquor in a crystallization step becomes a prescribed concentration, production of granular ammonium sulfate in the crystallizing step is temporally stopped and whole crystals attached to the crystallizing apparatus are dissolved and the mother liquor of ammonium sulfate in the crystallization step is transferred to the first saturating tower 2 and exchanged for mother liquor of ammonium sulfate having low free sulfuric acid concentration and charged from the second saturating tower 3, and then, production of granular ammonium sulfate in the crystallization step is reopened. Consequently, continuous circulation of the mother liquor between two steps of the adsorption and crystallization is made unnecessary. Operational days can be extended to be 2-3 times longer than that o.f conventional method.

4. 发明专利

JPH05223495A ADHERED SUBSTANCE REMOVING METHOD OF AMMONIA WATER HEAT EXCHANGER 失效
公开(公告)号：JPH05223495A
公开(公告)日：1993-08-31
申请号：JP2874892
申请日：1992-02-17
申请人： NIPPON KOKAN KK
发明人： MIYAKE MINORU , IKEDA HIDEO , FUJII KOJI , NAGANO HIROSHI , INADA KENJI
IPC分类号： C10K1/08 , F28G9/00
摘要： PURPOSE:To provide the method of removing adhered substances in a short period of time without dismantling the ammonia water heat exchanger in the refining system of coke furnace gas. CONSTITUTION:A T-tube 52 at the inlet side of ammonia water for an ammonia water heat exchanger 40 is connected to a tank 59 receiving benzole absorbing oil by a rubber hose 57 through a circulating pump 56. One end of another rubber hose 58 is connected to another T-tube 55 at the outlet side of the ammonia water and the other end of the hose 58 is inserted into the tank 59. The circulating pump 56 is started to circulate the benzole absorbing oil through the ammonia water flow passage of the ammonia water heat exchanger. When the circulation of the benzole absorbing oil is continued for three days, adhered substances (oil content, pitch and naphthalene) can be removed cleanly. According to this method, the adhered substance can be removed within a short period of time without dismantling the ammonia water heat exchanger whereby the recovering rate of NH3 can be improved.

5. 发明专利

JPH03247510A PRODUCTION OF GYPSUM FROM COKE OVEN GAS 失效
公开(公告)号：JPH03247510A
公开(公告)日：1991-11-05
申请号：JP4369490
申请日：1990-02-23
申请人： NIPPON KOKAN KK
发明人： MIZUSAWA MASATOSHI , SUMIKAMA TAKASHI , MIYAKE MINORU
IPC分类号： C01F11/46
摘要： PURPOSE:To produce gypsum large in mean crystalline particle diameter by specifying both pH value of hydrogen calcium sulfite slurry introduced into an oxidation tower and pH value of gypsum slurry discharged from the oxidation tower. CONSTITUTION:Coke oven gas is desulfurized and sulfur contained in the obtained waste liquid is burned. The combustion exhaust gas contg. SO2 is introduced into an absorption tower 1 and SO2 is absorbed into the prescribed amount of Ca(OH)2 soln. to produce hydrogen calcium sulfite slurry. This slurry is introduced into an oxidation tower 3 via a tank 2 and air is blown thereinto from the lower part. The slurry is oxidized to obtain gypsum slurry and gypsum 6 is obtained via a thickner 4 and a separator 5. At this time, Ca(OH)2 slurry is added to hydrogen calcium sulfite slurry in the tank 2 and pH value is regulated to 3.2-3.7. H2SO4 is added to gypsum slurry in the thickner 4 and pH value is regulated to 2.0-2.2. Thereby gypsum 6 is obtained which has about 30-40mum mean crystalline particle diameter and is excellent in quality and high in commodity value.

6. 发明专利

JPH03246446A METHOD FOR MEASURING GRAIN SIZE DISTRIBUTION OF GYPSUM 失效
公开(公告)号：JPH03246446A
公开(公告)日：1991-11-01
申请号：JP4369590
申请日：1990-02-23
申请人： NIPPON KOKAN KK
发明人： MIZUSAWA MASATOSHI , SUMIKAMA TAKASHI , MIYAKE MINORU
IPC分类号： G01N15/02 , C01F11/46
摘要： PURPOSE:To measure the grain size distribution of gypsum in a diluted gypsum slurry by the diffraction with a laser in a laser diffraction device as a light source by introducing the diluted gypsum slurry to the laser diffraction device. CONSTITUTION:A branch pipe 8 is mounted to the intermediate point of a conduit 7 for sending the gypsum slurry discharged from an oxidizing column 3 to a thickener 4 and a part of the gypsum slurry sent through the conduit 7 to the thickener 4 is introduced through the branch pipe 8 to a stirring chamber 9. The ethanol in a chamber 10 is added through a conduit into the gypsum slurry in the stirring chamber 9 and the gypsum slurry is sufficiently stirred and is diluted by the ethanol.

7. 发明专利

JPH02174986A METHOD FOR CLEANING AMMONIA DISTILLATION TOWER 失效
公开(公告)号：JPH02174986A
公开(公告)日：1990-07-06
申请号：JP33166088
申请日：1988-12-28
申请人： NIPPON KOKAN KK
发明人： WATANABE YOSHIAKI , MIYAKE MINORU , YAMAMOTO MASAAKI , SHIMONISHI KAZUHIRO , HIROKAWA MASAKATSU , YAMATE YOSHITOMO
IPC分类号： C02F1/04 , B01D3/38
摘要： PURPOSE:To eliminate the clogging of a tray in an ammonia distillation tower in a short time almost without any cost by suspending distillation, supplying aq. ammonia at 40-60 deg.C contg. medium-boiling-point oil into the tower from its top, and cleaning the clogged tray with the aq. ammonia flowing down in the tower. CONSTITUTION:The operation is suspended tentatively, aq. ammonia at 40-60 deg.C contg. medium-boiling-point oil is supplied into the distillation tower 1 at the rate of about 40-60m /H from an aq. ammonia inlet 6 at the upper part of the tower, and steam is blown in at the rate of 0.5T/H from a steam inlet 8. The aq. ammonia supplied into the tower 1 is used for cleaning the tray 2, and discharged from an aq. ammonia outlet 9. The clogging of the tray in the tower is eliminated by the tar, pitch, etc., contained in the aq. ammonia in a short time almost without any cost, and an industrially usefully useful effect is produced.

8. 发明专利

JPH07190835A OPERATION METHOD FOR TAR DECANTER 失效
公开(公告)号：JPH07190835A
公开(公告)日：1995-07-28
申请号：JP33333793
申请日：1993-12-27
申请人： NIPPON KOKAN KK
发明人： MIYAKE MINORU , SATO YUKINORI , FUCHIGAMI TAKAHARU , ARAKAWA YASUO
IPC分类号： G01F23/00 , C10C1/00 , G01F23/296
摘要： PURPOSE:To provide an operation method for a decanter properly separating ammonia liquor and tar. CONSTITUTION:A boundary sensor 20 is placed on the surface of ammonia liquor 6 in a tar decanter 2 together with a stain prevention mechanism 21 and by putting still condensed liquid put in the tar decanter 2, the upper layer ammonia liquor 6, lower layer tar 8 and bottommost tar deposit 9. Between the ammonia liquor 6 and tar 8 emulsion 7 exist. The boundary level of the emulsion 7 is continuously detected with the boundary sensor 20, the signal is input in an automatic controller 24. When the detected value exceeds a set value, next measure is immediately taken based on the detected value.

9. 发明专利

JPH06263439A PRODUCTION OF GYPSUM 失效
公开(公告)号：JPH06263439A
公开(公告)日：1994-09-20
申请号：JP8021993
申请日：1993-03-15
申请人： NIPPON KOKAN KK
发明人： KOYAMA KAZUHIDE , FUCHIGAMI TAKAHARU , MIKAMI MANABU , MIYAKE MINORU
IPC分类号： B01D53/50 , B01D53/77 , C01F11/46 , B01D53/34
摘要： PURPOSE:To reduce the production cost of gypsum and to contrive the available utilization of resources by availably utilizing a formed gypsum sludge without discarding in a process to produce gypsum from a waste combustion gas formed at the time of desulfurizing a coke oven gas generated by the carbonization of coke in a coke oven. CONSTITUTION:The waste combustion gas formed at the time of desulfurizing the coke oven gas is absorbed in a calcium hydroxide solution in an absorbing tower 1 and is oxidized in an oxidizing tower 3 to make a gypsum slurry, the gypsum slurry is classified in a liquid cyclone 9, the gypsum slurry small in particle diameter is returned to the absorbing tower 1 to circulate and the other hand, the gypsum slurry large in particle diameter is solid-liquid separated in a thickener 4 and is dehydrated to recover the gypsum and the separated water separated from the gypsum slurry in the thickener 4 is neutralized and the gypsum sludge formed by neutralizing is returned to the absorbing tower 1 to circulate in the system.

10. 发明专利

JPH06249808A FREEZING POINT AND CRYSTAL SEPARATION TEMPERATURE MEASURING DEVICE 失效
公开(公告)号：JPH06249808A
公开(公告)日：1994-09-09
申请号：JP5804693
申请日：1993-02-24
申请人： NIPPON KOKAN KK , ANATSUKU KK
发明人： MIYAKE MINORU , SATO YUKINORI , ARAKAWA KOJI , TANAKA ISAO
IPC分类号： G01N25/04
摘要： PURPOSE:To facilitate the measurement of a freezing point and crystal separation temperature of solution, conduct appropriate temperature management and carry out stable operation of a factory and the like. CONSTITUTION:The device is constituted of a heating and cooling device 1 for heating and cooling a sample, a temperature detector 2 for measuring the temperature of the sample, an optical detector 3 for measuring transmissivity of the sample, and a torque detector 4 for measuring the torque of the sample. Temperature at the time of transmissivity change detected by the optical detector 3 or temperature at the time of torque change detected by the torque detector 4 is adopted as a reference to measure a freezing point and crystal separation temperature of the sample.

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