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1. 发明专利

JPH08323139A STACK GAS TREATING SYSTEM 失效
公开(公告)号：JPH08323139A
公开(公告)日：1996-12-10
申请号：JP13199195
申请日：1995-05-30
申请人： MITSUBISHI HEAVY IND LTD
发明人： TATANI ATSUSHI , OKAZOE KIYOSHI , KIMURA KAZUAKI , SHIMIZU HIROSHI , OCHI EIJI , UGAWA NAOHIKO , HINO MASAO , OKINO SUSUMU , HARUKI TAKASHI , TAKASHINA TORU
IPC分类号： B01D53/34 , B01D53/46
摘要： PURPOSE: To easily make the Se contained in a stack gas harmless by cooling the stack gas below a specified temp., then separating the dust in the stack gas and admixing an Se elution preventive agent and a humidifying liq. or a soln. of the agent with the separated dust. CONSTITUTION: Most of Se in a stack gas is cooled to

2. 发明专利

JPH08266855A STACK GAS TREATING SYSTEM 失效
公开(公告)号：JPH08266855A
公开(公告)日：1996-10-15
申请号：JP7277895
申请日：1995-03-30
申请人： MITSUBISHI HEAVY IND LTD
发明人： TATANI ATSUSHI , OKAZOE KIYOSHI , KIMURA KAZUAKI , SHIMIZU HIROSHI , UGAWA NAOHIKO , HINO MASAO , OKINO SUSUMU , HARUKI TAKASHI , TAKASHINA TORU
IPC分类号： B01D53/34 , B01D53/46
摘要： PURPOSE: To make selenium contained in a stack gas harmless by providing a means for supplying a processing agent to insolubilize selenium(IV). CONSTITUTION: Most of the selenium (Se) contained in dust in a stack gas is removed by a dry dust collector 5 and dissolved in a liq. when the dust is brought into contact with the liq. such as water in a repulping means 13 and slurried. At least Se(IV) in the Se dissolved in the slurry is insolubilized by the processing agent of a processing agent supply means 16 and discharged on the solid-phase side in a separating means 15. Meanwhile, the filtrate separated in the means 15 is introduced into the slurry in a desulfurizer 20. Consequently, even Se(VI), which is contained in the stack gas, not insolubilized by the processing agent and dissolved in the filtrate, is allowed to react with the sulfurous acid absorbed in the slurry from the stack gas and reduced to Se(IV). Accordingly, since the Se dissolved in the circulating liq. consists essentially of Se(IV), the equipment of the entire system is simplified.

3. 发明专利

JPH10225615A WET TYPE FLUE GAS DESULFURIZER 失效
公开(公告)号：JPH10225615A
公开(公告)日：1998-08-25
申请号：JP3156997
申请日：1997-02-17
申请人： MITSUBISHI HEAVY IND LTD
发明人： HAYASHI ISAO , OKAZOE KIYOSHI , IWASHITA KOICHIRO
IPC分类号： B01D53/50 , B01D53/18 , B01D53/77
摘要： PROBLEM TO BE SOLVED: To provide a wet type flue gas desulfurizer having an absorber of reduced installation cost, operating cost and maintenance cost and of simple structure. SOLUTION: An absorber 3 of a wet type flue gas desulfurizer for subjecting liq. absorbent and waste combustion gas to gas-liquid contact to treat the waste gas has a storage tank 1 for the liq. absorbent being in the lower part thereof, a pump 8 and piping 7 for circulating the liq. absorbent from the storage tank 1, plural jet nozzles 6 connected to the pump 8 for jetting the liq. absorbent into the absorber 3, and an inlet 2 and an outlet 4 for the waste combustion gas. A nozzle header 5 is installed outside the wall of the absorber, and the nozzles 6 are arranged along the inner wall surface of the absorber 3, and the jetting direction of the nozzles 6 is made upward from the horizontal to jet the liq. absorbent from around the wall surface of the absorber.

4. 发明专利

JPH10118451A EXHAUST GAS TREATMENT APPARATUS AND METHOD 失效
公开(公告)号：JPH10118451A
公开(公告)日：1998-05-12
申请号：JP29463596
申请日：1996-10-17
申请人： MITSUBISHI HEAVY IND LTD
发明人： OCHI EIJI , OKAZOE KIYOSHI , ISHIHARA MAKIKAZU , TAKASHINA TORU
IPC分类号： B01D53/50 , B01D53/18 , B01D53/34 , B01D53/58 , B01D53/74 , B01D53/77
摘要： PROBLEM TO BE SOLVED: To suppress the concn. of ammonia in exhaust gas after treatment by providing a counter-current absorbing tower on an introducing side and a parallel flow absorbing tower which perform the gas-liquid contact with an absorbing soln. when at least sulfur dioxide and ammonia in exhaust gas are removed by the gas-liquid contact with the absorbing soln. SOLUTION: Untreated exhaust gas A and the absorbent slurry in a tank 21 jetted in a liquid column state from a spray pipe 4 are subjected to gas-liquid contact treatment in the counter-current absorbing tower 22 on an introducing side provided so as to upwardly extend from one side part of the tank 21 receiving the supply of an absorbent slurry to absorb or collect dust or ammonia along with sulfur dioxide. Thereafter, the exhaust gas led out of the introducing side absorbing tower 22 and the absorbent slurry in the tank 21 are again subjected to gas-liquid contact treatment in the parallel flow lead-out side absorbing tower 23 provided so as to upwardly extend from the other side part of the tank 21. By this constitution, the exhaust gas passing above a partition wall 24 to flow in the lead-out side absorbing tower 23 does not almost contain ammonia or sulfur dioxide and the remaining dust is collected and removed in the lead-out side absorbing tower 23.

5. 发明专利

JPH09285718A TREATMENT OF STACK GAS AND DEVICE THEREFOR 失效
公开(公告)号：JPH09285718A
公开(公告)日：1997-11-04
申请号：JP3615697
申请日：1997-02-20
申请人： MITSUBISHI HEAVY IND LTD
发明人： ONIZUKA MASAKAZU , TAKASHINA TORU , OKAZOE KIYOSHI , KATAYAMA HIROYUKI
IPC分类号： B01D53/34 , B01D53/18 , B01D53/50 , B01D53/77 , B01D53/78 , B03C3/011 , B03C3/014 , B03C3/02 , B03C3/76
摘要： PROBLEM TO BE SOLVED: To provide the method for treating a stack gas and device therefor by which SOx and dust are removed with a simple equipment, and the capacity of an electrostatic precipitator provided on the upstream side is reduced. SOLUTION: Dust and SOx are removed from a waste gas contg. the SOx and dust by this method. A simple electrostatic precipitator 1 consisting of a collecting electrode and a discharge electrode is provided at the upper part of an absorption tower 2 into which a liq. absorbent contg. an alkali agent is pumped up and sprayed, and a high-voltage power source device 5 for charging the precipitator 1 and a hammering device 6 to periodically sweep off the dust collected by the precipitator 1 are provided to the precipitator 1. Further, the waste gas is treated by the precipitator 1 and then cleaned in the absorption tower 2, the precipitator 1 is periodically hammered to sweep off the collected dust, and the SOx and dust are removed at the same time.

6. 发明专利

JPH0938456A WET FLUE GAS DESULFURIZER 失效
公开(公告)号：JPH0938456A
公开(公告)日：1997-02-10
申请号：JP19849195
申请日：1995-08-03
申请人： MITSUBISHI HEAVY IND LTD
发明人： OKAZOE KIYOSHI , OCHI EIJI , TAKASHINA TORU , OKINO SUSUMU
IPC分类号： B01D53/34 , B01D53/50 , B01D53/77
摘要： PROBLEM TO BE SOLVED: To decrease the oxidizing substance generated in the tank of an absorption tower by reducion, by, sampling a part of a slurry before flowing into the liq. surface of the tank by a descending slurry extracting means and mixing the slurry with a slurry drawn out of the tank by a mixing means. SOLUTION: A slurry received by a receiver 20 is hardly oxidized in an absorption tower 1 and contains sulfurous acid. Accordingly, the slurry is draw out through a descending slurry discharge pipeline 21, supplied to a joint 24 on the slurry suction side of a pump 10 and mixed with a slurry extracted from a tank 2. Consequently, even if an oxidizing substance is contained in the slurry extracted from the tank 2 by the pump 10, the substance is oxidized by sulfurous acid and neutralized.

7. 发明专利

JPH04243520A HIGH PERFORMANCE EXHAUST GAS DESULFURIZING METHOD 失效
公开(公告)号：JPH04243520A
公开(公告)日：1992-08-31
申请号：JP2030491
申请日：1991-01-22
申请人： MITSUBISHI HEAVY IND LTD
发明人： OCHI EIJI , OKAZOE KIYOSHI , UGAWA NAOHIKO , OKINO SUSUMU
IPC分类号： B01D53/34 , B01D53/50 , B01D53/77 , C01F11/46
摘要： PURPOSE:To remove SOx from combustion exhaust gas with high efficiency by a wet lime-gypsum method. CONSTITUTION:Combustion exhaust gas is brought into contact with a gypsum slurry containing 1% or less of calcium carbonate in a first absorbing tower and subsequently brought into contact with a gypsum slurry containing 1% or more of calcium carbonate in a second absorbing tower to be subjected to desulfurization treatment.

8. 发明专利

JPH11169746A DRY TYPE ELECTRICAL DUST PRECIPITATOR 失效
公开(公告)号：JPH11169746A
公开(公告)日：1999-06-29
申请号：JP34602297
申请日：1997-12-16
申请人： MITSUBISHI HEAVY IND LTD
发明人： OKAZOE KIYOSHI , OCHI EIJI , ONISHI SHOICHI , KATAOKA HARUHIKO
IPC分类号： B03C3/02 , B03C3/01 , B03C3/04
摘要： PROBLEM TO BE SOLVED: To achieve the miniaturization and reduction in cost of a flue gas treating device and remove dust in an exhaust gas efficiently. SOLUTION: The dry type electrical dust precipitator comprises a gas-gas heat exchange section 2 for cooling an exhaust gas from a boiler in which a fossil fuel is burned and an electrical dust precipitating section 3 which is formed integrally with the section 2 and has hoppers 5 at its bottom to remove dust in the exhaust gas. A lower end (point A) of a flue at the connection between the section 2 and the section 3 is on the same level with or below the lower end (point B) of the flue of the section 2 and on the same level with or above the upper end (point C) of the hopper 5 of the section 3.

9. 发明专利

JPH1094714A FLUE GAS TREATMENT 失效
公开(公告)号：JPH1094714A
公开(公告)日：1998-04-14
申请号：JP27155896
申请日：1996-09-20
申请人： MITSUBISHI HEAVY IND LTD
发明人： OKAZOE KIYOSHI , OCHI EIJI , ISHIHARA MAKIKAZU , TAKASHINA TORU
IPC分类号： B01D53/34 , B01D53/14 , B01D53/50 , B01D53/58 , B01D53/77
摘要： PROBLEM TO BE SOLVED: To provide a flue gas treating method in which the concentration of ammonia in flue gas after treatment is kept low by using a small-sized gas- liquid contact device provided with both a concurrent flow absorber and a countercurrent flow absorber. SOLUTION: A gas-liquid contacting device is provided with an introducing side tank 21 into which a liquid absorbent is fed, a concurrent flow introducing side absorber 2 installed extended upward from the introducing side tank 21 and for subjecting untreated flue gas to gas-liquid contact with the liquid absorbent in the introducing side tank 21, a bring-out side tank 22 arranged adjacent to the introducing side tank 21 and into which a liquid absorbent is separately fed, and a countercurrent flow bring-out side absorber 3 installed extended upward from the bring-out side tank 22 and for introducing flue gas brought out from the introducing side absorber 2 to subject it to gas-liquid contact with the liquid absorbent in the bring-out side tank 22. By using the gas-liquid contracting device, fly mist is removed from flue gas before flowing into the bring-out side absorber 3 to return it to the introducing side tank 21, and also pH of the liquid absorbent of the other absorber is controlled to a low value (for example, 4.0-5.0) at which ammonia is hardly diffused into flue gas.

10. 发明专利

JPH09313880A FLUE GAS DESULFURIZING TREATMENT AND DEVICE THEREFOR 失效
公开(公告)号：JPH09313880A
公开(公告)日：1997-12-09
申请号：JP13645596
申请日：1996-05-30
申请人： MITSUBISHI HEAVY IND LTD
发明人： SHINODA TAKEO , HIGUCHI TAMOTSU , KOTAKE SHINICHIRO , OKAZOE KIYOSHI , OKINO SUSUMU
IPC分类号： B01D53/50 , B01D47/06 , B01D53/18 , B01D53/77
摘要： PROBLEM TO BE SOLVED: To provide a flue gas treating method by which flue gas desulfurization and dust removal are realized with a smaller equipment structure, at low cost and more effectively and a device therefor. SOLUTION: This device is constituted of a liquid absorbent feeding tank 1, an introducing side absorber 2 having the fixed sectional shape which is installed extended upward from one side thereof and in which slurry is jetted upward in liquid columns from plural places in the horizontal direction to bring untreated flue gas into gas-liquid contact with liquid absorbent in the tank, and a bring-out side absorber 3 having the fixed sectional shape which is installed extended upward from the other side and in which slurry is jetted upward in liquid columns from plural places in the horizontal direction to bring flue gas brought out from the introducing side absorber 2 into gasliquid contact again with the liquid absorbent in the tank. One of the introducing side and bring-out side absorbers 2, 3 is made a concurrent absorber in which flue gas descends, and the other of the introducing side and bring-out side absorbers 2, 3 is made a countercurrent absorber in which flue gas rises. The flow passage sectional area of the concurrent absorber is made smaller compared with that of the coutercurrent absorber so that high flue gas flow velocity desirable for dust collection and gaseous SO, absorption may be obtained. The flow passage sectional area of the coutercurrent absorber is made larger compared with that of the cocurrent absorber so that flue gas velocity preferable for gaseous SO2 absorption in the gas-liquid contact of countercurrent type may be obtained.

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