专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

JPH11294703A ONCE-THROUGH BOILER 失效
公开(公告)号：JPH11294703A
公开(公告)日：1999-10-29
申请号：JP10488198
申请日：1998-04-15
申请人： BABCOCK HITACHI KK
发明人： SHIMOGOORI YOSHIHIRO , MORITA SHIGEKI , SAKAI KAZUTO , MATSUDA JUNICHIRO , MIMURA TETSUO
IPC分类号： F22B29/06 , F22B37/12
摘要： PROBLEM TO BE SOLVED: To provide a once-through boiler the output of which can be controlled easily in variable pressure operation and which can be cooled highly efficiently and can reduce the mass flow rate in a tube. SOLUTION: The furnace wall of a once-through boiler is formed of a ribbed tube provided with a spiral rib on its internal surface and the ribbed tube is inclined by 45 deg.-90 deg. from the vertical direction. In addition, the equivalent inside diameter (d), height (h), and lead angle θ of the ribbed tube are selected so that a dimensionless amount F (F=d/(hcosθ) is may be positioned in the area between the curves (c) and (b), preferably, between the curves (a) and (b) against the mass flow rate M of a fluid flowing through the ribbed tube when the steam output is 100%. When the swirling force of the internal fluid along the wall of the ribbed tube is increased by selecting the winding direction of the rib in accordance with the flowing direction of the fluid on the front side when viewed from the inside of the furnace of the boiler, a more satisfactory result can be obtained.

2. 发明专利

JPH10232002A BOILER 失效
公开(公告)号：JPH10232002A
公开(公告)日：1998-09-02
申请号：JP34816897
申请日：1997-12-17
申请人： BABCOCK HITACHI KK
发明人： MATSUDA JUNICHIRO , KODA FUMIO , MIMURA TETSUO , KAWASE TAKAYO , MORITA SHIGEKI
IPC分类号： F22D1/02 , F22G1/02 , F22G5/12
摘要： PROBLEM TO BE SOLVED: To provide a boiler unit which restrains an increase in the heat transfer area of a reheater and improves the control response, when arranging the total number of reheaters on the rear heat transfer part in which the quantity of gas distribution is controlled by a means that controls the flow rate of gas distribution such as a gas distributing damper. SOLUTION: This boiler controls a gas flow rate by providing a gas passageway leading to the inlet of a rear heat transfer part with only pendant superheaters 50 and 60, the rear heat transfer part with a horizontal reheater 71, and the outlet side of the divided gas passage of the rear heat transfer part with each damper 90. The heat transfer area of the superheaters 50 and 60 are set to have the exhaust gas temperature at the inlet of the rear heat transfer part of 1,000 deg.C-1,100 deg.C at the maximum load of the boiler, so that the increase in both the heat transfer area of the reheater 71 and the heat capacity can be restrained due to the rise in the temperature of gas and steam which flows inside the reheater 71. Approximately 1,100 deg.C is the minimum temperature at which coal ash starts to soften, and this is cooled down to be solidified, thus preventing the slacking of the reheater 71.

3. 发明专利

JPH08210603A ONCE-THROUGH BOILER 失效
公开(公告)号：JPH08210603A
公开(公告)日：1996-08-20
申请号：JP1574195
申请日：1995-02-02
申请人： BABCOCK HITACHI KK
发明人： SHIMOGOORI YOSHIHIRO , MIMURA TETSUO , SAKAI KAZUTO
IPC分类号： F22B21/04
摘要： PURPOSE: To provide a once-through boiler in which the tube wall temperature of a furnace water-wall tube does not exceed an allowable temperature and thermal efficiency is good. CONSTITUTION: An once-through boiler 1 performing a variable pressure operation comprises a vertical furnace water-wall tube 2, an inlet pipe header 3 for feeding and distributing boiler water to the furnace water-wall tube 2 and an intermediate pipe header 4 or an outlet pipe header 5 for collecting steam from the furnace water-wall tube 2. The once-through boiler 1 is formed in such a way that the sum of all pressure losses except the hydrostatic head difference from the inlet pipe header 3 to the first intermediate pipe header 4 or from the inlet pipe header 3 to the outlet pipe header 5 in an average inside mass flow during the maximum continuous load of the once-through boiler 1 is not more than the hydrostatic head difference. Further, the average inside mass flow of the furnace water-wall tube 2 is 800 to 1600kg/m s. The furnace water-wall tube 2 with low heat load has an orifice for adjusting the flow rate of the furnace water-wall tube 2.

4. 发明专利

JPH07163850A FLUID MIXER 失效
公开(公告)号：JPH07163850A
公开(公告)日：1995-06-27
申请号：JP31351793
申请日：1993-12-14
申请人： BABCOCK HITACHI KK
发明人： TANIGAWA MASUMI , IGUCHI YUJI , MIMURA TETSUO , FUKUMOTO FUMIO
IPC分类号： B01F3/02 , B01F5/02
摘要： PURPOSE:To simultaneously satisfy the acceleration of the uniform mixing of fluids and the reduction of pressure loss on the side of a mixed fluid by equalizing the jet flow rate of the mixed fluid supplied to a main fluid in the direction almost crossing the flow direction of the main fluid at a right angle. CONSTITUTION:The mixed fluid 5 supplied through a mixed fluid passage 6 is forcibly changed in its direction by the distribution plate 7 in a mixer 3 and, since the mixed fluid 5 is ejected to the flow of a main fluid 1 from the jet orifices 4 of the respective chambers of the mixer 3 in the direction crossing the flow direction of the main fluid 1 of the mixer 1 at a right angle, the pressure loss on the side of the mixed fluid and the main fluid can be reduced. The mixed fluid 5 ejected from the inclined downstream wall surface 3b of the mixer 3 is diffused widely in the lateral direction of a main fluid passage 2 in a drawing to meet with the main fluid 1 to accelerate the uniformization of the distribution in the lateral direction of the main fluid passage 2. The inlet distribution plate 8 disposed between the chambers has effect not generating peeling in the flow of the mixed fluid at the inlet part of the mixer 3 and the pressure loss on the side of the mixed fluid can be reduced.

5. 发明专利

JPH06147410A STEAM GENERATING DEVICE 失效
公开(公告)号：JPH06147410A
公开(公告)日：1994-05-27
申请号：JP30421492
申请日：1992-11-16
申请人： BABCOCK HITACHI KK
发明人： MIMURA TETSUO , MATSUDA JUNICHIRO
IPC分类号： F22G3/00 , F22B1/18 , F22B37/10 , F22B37/12
摘要： PURPOSE:To vary a flow rate of steam flowing through heat transfer pipes and lower a pipe metal temperature without expanding unbalance of heat absorption of the heat transfer pipes. CONSTITUTION:A pipe diameter of each of non-heating part pipes 13, 17 connected to heating part pipes 15 on an outer peripheral portion, which have a relatively large heat absorption rate, is made larger, and a pipe diameter of each of non-heating part pipes 12, 16 connected to heating part pipes 14 on an inner peripheral portion, which have a relatively small heat absorption rate, is made smaller. Thereby, the pressure drop of steam flowing through the pipes 13, 17 is decreased and the pressure drop of steam flowing through the pipes 12, 16 is increased. As a result, a relatively larger amount of steam is permitted to flow through the heating part pipes 15 on the outer peripheral portion than the amount of steam flowing through the heating part pipes 14. Further, the length of the non-heating part pipes 13 on an inlet side is made relatively shorter, and the length of the non-heating part pipes 12 on the inlet side is made relatively longer. Even in this case, the pressure drop of steam flowing through the heating part pipes 15 is decreased, and a relatively large amount of steam is permitted to flow therethrough.

6. 发明专利

JPH05248604A 失效
公开(公告)号：JPH05248604A
公开(公告)日：1993-09-24
申请号：JP4686492
申请日：1992-03-04
申请人： BABCOCK HITACHI KK
发明人： SHIGENAKA TOSHINORI , MIMURA TETSUO , YOSHIZAKI HIROSHI
IPC分类号： F22B1/18 , F22G5/12
摘要： PURPOSE:To reduce a temperature difference between temperature reduced water and steam and prolong the life of a temperature reducer in a waste heat recovery boiler having the temperature reducer arranged in at least one of a superheater and a reheater by a method wherein there is provided a temperature reducing water pipe for extracting the temperature reduced water of the temperature reducer from an intermediate part of a high temperature coal saving device. CONSTITUTION:A reheating type waste heat recovery boiler is constructed such that a low pressure boiler and a high pressure boiler are arranged in sequence from a downstream side of a waste gas passage discharged from a gas turbine, and the high pressure boiler is comprised of a high pressure coal saving device 6, a high pressure evaporator 7 and a high pressure drum 8. Steam separated within the high pressure drum 8 is sent to the superheater 9 and its temperature is increased there, and then the steam is supplied to the high pressure steam turbine. Although the superheater 9 is provided with a temperature reducer 27, the temperature reduced water of the temperature reducer 27 in this case is extracted from the intermediate position of the coal saving device 6 and further taken into the temperature reducer 27 through the temperature reduced hot water pipe 31 having an adjusting valve 29 installed therein. With such an arrangement, it is possible to limit the temperature difference between the steam and the temperature reduced water to a maximum value of about 200 deg.C and then to prolong the life of the temperature reducer 27.

7. 发明专利

JPH0522804B2 失效
公开(公告)号：JPH0522804B2
公开(公告)日：1993-03-30
申请号：JP2198985
申请日：1985-02-08
申请人： BABCOCK HITACHI KK
发明人： KISHI MITSUO , ISODA KAETSU , MIMURA TETSUO
IPC分类号： B01D53/56 , B01D53/34 , F23C9/08 , F23C99/00 , F23K3/02 , F23N1/00

8. 发明专利

JPH04278101A EXHAUST HEAT RECOVERY BOILER 失效
公开(公告)号：JPH04278101A
公开(公告)日：1992-10-02
申请号：JP6378991
申请日：1991-03-06
申请人： BABCOCK HITACHI KK
发明人： SHIGENAKA TOSHINORI , FURUBAYASHI HAJIME , MIMURA TETSUO , SAKAMOTO KIMIYA
IPC分类号： F22B1/18 , F22B37/00
摘要： PURPOSE:To mitigate an abnormal rise of the steam pressure in a low pressure drum which is generated in the hot banking of an exhaust heat recovery boiler. CONSTITUTION:A condenser drain piping 26 and a drain tank drain piping 28 are provided between a condenser 26 and drain tank 27 from a low pressure main steam pipe 14, and one of a condenser drain valve and a drain tank drain valve 30 is opened or closed based on the difference between the pressure detection signal 32 and the pressure setting signal 34 from a pressure detection device 31 to make the steam from a low pressure drum 5 escape to the condenser 24 and drain tank 27.

9. 发明专利

JPH03117801A EXHAUST HEAT RECOVERY BOILER 失效
公开(公告)号：JPH03117801A
公开(公告)日：1991-05-20
申请号：JP25231589
申请日：1989-09-29
申请人： BABCOCK HITACHI KK
发明人： SHIGENAKA TOSHINORI , KUSAKA IWAO , MIMURA TETSUO , MIYAKE SHOSUKE , YOSHIZAKI HIROMORO
IPC分类号： F22B1/18
摘要： PURPOSE:To increase the flow rate in the pipe and maintain the heat recovery rate high even if the number of heat transfer pipes in the heat transfer panel increases by constituting a heat exchanger of a heat transfer panel that has a plurality of heat transfer pipes that are arranged in parallel, an inlet header, an outlet header, and an intermediate header. CONSTITUTION:In a heat transfer panel 18 a large number of heat transfer pipes 22 are arranged in a gas passage, and the heat transfer pipes 22 are substantially divided into two halves, the left section and the right section. To one end of a heat transfer pipe 22 on the right side (in an area (a)) an inlet header 19 is connected. On the other hand to one end of a heat transfer pipe 22 on the left side (area (b)) an outlet header 20 is connected. These inlet header 19 and outlet header 20 are completely separated, and a gas passing prevention plate 27 is arranged at the position which corresponds to the gap between both headers. And, the other ends 22 of all heat transfer pipes are connected to an intermediate header 25. When the inlet header 19 and outlet header 20 are divided as above mentioned, the gap between the heat transfer pipes 22 (a) and 22(b) becomes large, and the exhaust gas G passes through this gap and makes a short-pass so that the heat recovery rate is reduced. The gas passing prevention plate 27 prevents the short-pass and raise the heat recovery rate.

10. 发明专利

JPH0210019A CONTROL METHOD FOR BYPASS DAMPER OF ECONOMIZER 失效
公开(公告)号：JPH0210019A
公开(公告)日：1990-01-12
申请号：JP15800088
申请日：1988-06-28
申请人： BABCOCK HITACHI KK
发明人： MIMURA TETSUO , KUNIHIRO YUJI
IPC分类号： F23N3/02 , B01D53/94 , F23J15/00
摘要： PURPOSE:To prevent generation of steaming even at a high load falling speed by opening an economizer bypass damper at a load higher than the load at which steaming occurs, and by closing a gas damper on a super heater side simultaneously. CONSTITUTION:A signal 24 from a feed water thermometer 22 on an outlet of an economizer, and a saturated temperature control signal 27 that is calculated from the signal 25 from pressure gauge 24 are input to a subtracter 28 to obtain a saturated temperature deviation signal 29. On the other hand, a signal 31 from a target load command 30 and a signal 33 from a generator output command 32 are compared with an output signal 36, that is stored immediately after the load begins to drop, to obtain a load fluctuation range signal 38, and a temperature range signal 40 against the load fluctuation range is calculated by a function generator 39. On the other hand, the generator output command signal 33 is differentiated to obtain a load fluctuation range signal 42, and the temperature range signal 40 is converted to a temperature correction signal 44 by a multiplier 43. When the temperature range signal and the temperature correction signal are input to a deviation signal detector 45 and a deviation signal 46 is detected, a full open signal 48 is transmitted from a signal turn-over device 47 to open a bypass damper 20 full so that the gas flow to the economizer is reduced to maintain a specified sub-cooling degree.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式