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

JPH0337304A START OF STEAM TURBINE GENERATION PLANT PROVIDED WITH TURBINE BYPASS DEVICE 失效
公开(公告)号：JPH0337304A
公开(公告)日：1991-02-18
申请号：JP17353089
申请日：1989-07-05
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： TAKEDA TAIJI , KANEDA HIDEAKI , OGINO SATORU , IKEMATSU TAKEHIKO , TERANISHI NORIYOSHI , HOIZUMI SHINICHI
IPC分类号： F01D19/00 , F01K7/24
摘要： PURPOSE:To improve the starting property of a steam turbine generation plant by introducing steam into a high pressure turbine after introducing steam into a medium pressure turbine in starting the plant to change the opening and closing speed of a steam spill valve or intercept valve with a physical amount corresponding to the running condition of a high pressure turbine bypass device. CONSTITUTION:In starting a steam turbine plant, steam from a steam generator 1 is passed through a main steam pipe 2, high pressure bypass pipe 21 and low temperature reheating pipe 6 to be heated again by the steam generator 1 and then sent through a high temperature reheating pipe 7 and intercept valve 8 to a medium pressure turbine 9 and low pressure turbine 10. If the further load is increased after sending the steam into both turbines, a steam spill valve 3 is opened to introduce steam into a high pressure turbine 4. The steam spill valve 3 and intercept valve 8 are controlled by a valve opening controller X according to a turbine load signal Q, while, when the opening B of a high pressure bypass valve is a specified one or less, a controlling signal for stopping the abrupt opening of the steam spill valve 3 is constitutionally inputted to the valve opening controller X.

2. 发明专利

JPH11270305A TURBINE BYPASS VALVE CONTROL DEVICE 失效
公开(公告)号：JPH11270305A
公开(公告)日：1999-10-05
申请号：JP9070398
申请日：1998-03-20
申请人： HITACHI LTD , HITACHI ENG CO LTD
发明人： ISHIKAWA HITOSHI , IKEMATSU TAKEHIKO
IPC分类号： F01D17/20 , F01K7/24 , F01K9/04
摘要： PROBLEM TO BE SOLVED: To keep as a whole balance of the system for avoiding an excess discharge of steam to a down stream of each turbine bypass by controlling openings of high pressure and low pressure turbine bypass valves when a load decrease suddenly by turbine load rejection. SOLUTION: This plant comprises steam generators 1 and 7, turbines 5, 13, a condenser 14, steam pipes 2, 8 guiding steam from the steam generators 1, 7 to the turbines 5, 13 and steam pipes 21, 35 which has turbine bypass valve 22, 36 bypassing turbine so as to guide the steam of the steam generator from the steam pipes 2, 8 to the condenser. In this case, means 29, 30 which set an opening upper limit obtained from steam pressure in the steam pipes 2, 8 to a control signal (output of PI25) of the turbine bypass valves are provided so as to detect a pressure return after increasing steam pressure when a load of the turbine and keep the turbine bypass valve to the opening upper limit when the pressure returns specified pressure.

3. 发明专利

JP2000303804A COAL GASIFICATION COMPOUND GENERATION PLANT AND OPERATION CONTROL APPARATUS THEREOF 失效
公开(公告)号：JP2000303804A
公开(公告)日：2000-10-31
申请号：JP11651399
申请日：1999-04-23
申请人： HITACHI LTD
发明人： NAGABUCHI NAOYUKI , TAKAHASHI MASAE , ISHIDA TAKESHI , SATO YOSHIO , KISO FUMIHIKO , KATAGIRI YUKINORI , IKEMATSU TAKEHIKO , NAKAMURA HIDEO , SHIMAUCHI KENTA , KIDA ARATA , SUGITA NARIHISA
IPC分类号： F01K23/10 , C10J3/02 , F02C3/28 , F22B1/18
摘要： PROBLEM TO BE SOLVED: To reduce temporal retarding of control, stabilize gas pressure under load fluctuation, and suppress reduction of gas turbine output in a coal gasification compound generation plant. SOLUTION: A gas turbine bypass piping 23, on which a gas turbine bypass valve 24 is interposed, is branched from a refined gas supply pipe line 67 on its upstream side of a pressure adjustment valve 16, through which pipe line 67 for refined gas is supplied from a gas refining arrangement 9 to a burner 3. A refined gas combustion device 25 is connected to the piping 23 for burning the refined gas. The refined gas combustion device 25 is connected to an exhaust heat recovery device 10, which recovers heat from exhaust gas of a gas turbine 4 for generating steam, at its discharging side of the combustion gas for recovering heat. An opening of the gas turbine bypass valve 24 is increased under normal operation, when the gas pressure at an outlet of gasification oven exceeds a set value. In a reverse case, the opening is decreased. The opening is so controlled that a difference is equal to zero between a set value of a steam turbine output and an actual output under load fluctuation.

4. 发明专利

JPS63176903A BOILER FEED PUMP LOAD RUN-BACK DEVICE 失效
公开(公告)号：JPS63176903A
公开(公告)日：1988-07-21
申请号：JP485987
申请日：1987-01-14
申请人： HITACHI LTD , BABCOCK HITACHI KK
发明人： TERANISHI NORIYOSHI , TAKAHASHI MASAHARU , IKEMATSU TAKEHIKO , ISHIWAKI TOSHIAKI , KAMINAGA EIICHI
IPC分类号： H02P9/04 , F01D21/14 , F01K13/02 , F22B35/00

5. 发明专利

JPS5798705A FEED WATER FLOW RATE CONTROLLER FOR DRUM TYPE BOILER 失效
公开(公告)号：JPS5798705A
公开(公告)日：1982-06-19
申请号：JP17454980
申请日：1980-12-12
申请人： HITACHI LTD
发明人： IKEMATSU TAKEHIKO
IPC分类号： F22D5/30

6. 发明专利

JPH04101737A INDICATION OF OPERATIONAL PROCEDURE AND ITS DEVICE 失效
公开(公告)号：JPH04101737A
公开(公告)日：1992-04-03
申请号：JP21892090
申请日：1990-08-22
申请人： HITACHI LTD
发明人： NIKAWARA SEIITSU , IKEMATSU TAKEHIKO , KOMOTO HIROSHI
IPC分类号： B23Q17/00 , B23P21/00 , G05B19/418 , G06F3/048 , G06F3/14 , G06T19/00
摘要： PURPOSE:To transmit operational procedure of elements to an operator accurately, and make the operator understand the operational procedure promptly and practically by constituting an animated picture image for indicating the assembly operational procedure of an object picture image from arbitrary cross view point coordinate information. CONSTITUTION:For example, the position of an object picture image 163 of a bolt is designated by coordinate of a reference point 165 of the bolt, and the direction is designated by angles 166a, 166b which indicate direction of reference direction vector 166 of the bolt and a rotation angle 166c. The coordinate of the reference point 165 of the bolt is shown in a form of X=(x, y, z) from x coordinate 165a, V coordinate 165b, y z coordinate 166c, and the directions 166a, 166b and the rotation angle 166c are show in a form of theta= (thetaa, thetab, thetac). In order to realize a picture image from an arbitrary view point, a virtual view point 171 and a virtual picture image 172 are moved/rotated with mutual distance between the virtual view point 171 and the center point 177 of the virtual picture image 172 kept so that the object picture image of a bolt 173 may be obtained at a desired position and direction.

7. 发明专利

JPS63117106A STOPPAGE CONTROLLING METHOD AND DEVICE FOR TURBINE PLANT 失效
公开(公告)号：JPS63117106A
公开(公告)日：1988-05-21
申请号：JP26195686
申请日：1986-11-05
申请人： HITACHI LTD
发明人： IKEMATSU TAKEHIKO
IPC分类号： F01K7/24 , F01K13/02
摘要： PURPOSE:To prevent temperature-rise in the exhaust port of a high-pressure turbine so as to reduce disturbance in e power transmission system, at the process of stopping a turbine plant, by breaking steam supply to the high- pressure turbine under the particular condition, and exhausting steam in the high-pressure turbine into a condenser. CONSTITUTION:There is provided a comparison arithmometer 22 which compares the inner pressure 20 in a high-pressure turbine 4 with the reheat steam pressure 21 thereof so as to calculate its deviation. The comparison arithmometer 22 fully closes the governor 3 of the high-pressure turbine when the deviation becomes below the specified value. While the governor 3 of the high-pressure turbine is fully closed, a steam dump valve 17 opens so that steam in the high-pressure turbine 4 is exhausted into a condenser 11. Therefore, it is possible to prevent temperature-rise in the exhaust part of the high-pressure turbine, hence ensuring reduction of disturbance in a power transmission system at the time of turbine trip.

8. 发明专利

JP2000248908A COAL GASIFICATION COMBINED POWER GENERATING PLANT AND ITS OPERATING METHOD 失效
公开(公告)号：JP2000248908A
公开(公告)日：2000-09-12
申请号：JP4671699
申请日：1999-02-24
申请人： HITACHI LTD
发明人： KATAGIRI YUKINORI , SATO YOSHIO , KISO FUMIHIKO , NAGABUCHI NAOYUKI , SHIMAUCHI KENTA , IKEMATSU TAKEHIKO , NAKAMURA HIDEO , TAKAHASHI MASAE
IPC分类号： F01K23/10 , F02C3/28 , F02C6/18 , F02C9/28
摘要： PROBLEM TO BE SOLVED: To provide a coal gasification combined power generating plant, capable of making changeover between an operation mode making a plant efficiency maximum and an operation mode which maximizes plant load follow-up property. SOLUTION: When a plant efficiency is to be made a maximum, a minimum operation mode 1 is selected, which makes the opening of a steam turbine regulating valve 23 100%, and makes the quantity of gas turbine power generation attainable by a low load operation, and when a plant load follow-up property is to be made maximum, a load change operation mode 3 is selected, which allows the opening of a gas turbine regulating valve 11 and the opening of a steam turbine regulating valve 23 to be simultaneously operated, and in the case of a halfway of changeover between the minimum operation mode 1 and a load change operation mode 3, a steam pressure setting value 37 is changed in a ramp manner, from the pressure of the mode 1 to the pressure of the mode 3, and a mode 2 is selected, in which the correct valve opening 43 of the seam turbine regulating valve 23 is computed by a PI controller 42 so as to let steam pressure 36 follow up the setting pressure 37. The amount of coal/ gasification agent used can be reduced, and charged cost can also be reduced.

9. 发明专利

JPH0564839B2 失效
公开(公告)号：JPH0564839B2
公开(公告)日：1993-09-16
申请号：JP8292087
申请日：1987-04-06
申请人： HITACHI LTD
发明人： MEGURO KAZUTOSHI , IKEMATSU TAKEHIKO
IPC分类号： G08B23/00 , G05B23/02 , G08B5/00 , G08B25/00 , G08B25/10 , G08B27/00 , H04Q9/02

10. 发明专利

JPS6419205A HIGH PRESSURE FEED WATER HEATER PRESSURE CONTROLLER 失效
公开(公告)号：JPS6419205A
公开(公告)日：1989-01-23
申请号：JP17099387
申请日：1987-07-10
申请人： HITACHI LTD
发明人： IKEMATSU TAKEHIKO , TAKAHASHI MASAHARU
IPC分类号： F22D5/26
摘要： PURPOSE: To prevent the sudden change of pressure of a high-pressure feed water heater barrel even when an extraction pressure is changed suddenly during the in-service of the high-pressure feed water heater by a method wherein a high-pressure feed water heater barrel pressure is controlled based on the set value of a signal obtained by multiplying an extraction pressure signal before a first regulating valve in the rear stream of an extraction stop valve by a changing rate limit. CONSTITUTION: A high-pressure feed water heater pressure controller is provided with a high-pressure feed water heater barrel pressure controller 21, provided with a first regulating valve 15 in the rear stream of an extraction stop valve 14 and a pipeline 18, connecting the inlet port of a super-heater 2, including a steam stop valve 16 and a second regulating valve 17, to the rear stream of the valve 15 to control the valves 15, 17 through an extraction pressure detector 19 and a high-pressure feed water heater barrel pressure detector 20. The pressure of the high-pressure feed water heater barrel 12 is controlled based on the set value of a signal, obtained by multiplying an extraction pressure signal before the valve 15 by a changing rate limit whereby the valve is operated into the closing direction thereof when a load is increased suddenly and the extraction pressure is increased suddenly. On the contrary, the valve 17 is operated into the opening direction thereof when the load is lowered suddenly and the extraction pressure is reduced suddenly. In this case, when the extraction pressure before the valve 15 shows only a slow change in the degree that the pressure will not receive any changing rate limit, the valve 15 is fully opened as it is and the valve 17 is closed totally as it is.

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