CN106338060B - The water supply system of Combined Cycle Heat Recovery Boiler - Google Patents
The water supply system of Combined Cycle Heat Recovery Boiler Download PDFInfo
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- CN106338060B CN106338060B CN201610641968.1A CN201610641968A CN106338060B CN 106338060 B CN106338060 B CN 106338060B CN 201610641968 A CN201610641968 A CN 201610641968A CN 106338060 B CN106338060 B CN 106338060B
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- pressure
- water
- pressure feed
- pump
- feed water
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D11/00—Feed-water supply not provided for in other main groups
- F22D11/02—Arrangements of feed-water pumps
- F22D11/06—Arrangements of feed-water pumps for returning condensate to boiler
Abstract
The present invention relates to a kind of water supply systems of Combined Cycle Heat Recovery Boiler.The present invention includes the water supply main road being made of pump be sequentially connected, solidifying, condensation water heater, low pressure feed water operation console, low-pressure drum, the middle pressure water supply branch being made of the middle pressure feed pump, middle pressure economizer, middle pressure water-supplying operation platform, the middle pressure drum that are sequentially connected, by the high-pressure feed water branch of the high-pressure feed water arrival end, high-pressure feed water speed regulation device, high pressure water pump, high-pressure feed water operation console, high-pressure economizer, HP steam drum that are sequentially connected, middle pressure feed pump is connected with low-pressure drum outlet end, and high-pressure feed water arrival end is connected with middle pressure economizer exit end.Due in the present invention, high-pressure system water supply is derived from middle pressure economizer exit end, so that middle pressure water supply pump discharge is significantly increased, the lift of high pressure water pump is greatly reduced, the operational efficiency of middle high-pressure feed pump is substantially improved, the power consumption for thus significantly reducing unit, improves the on-road efficiency on stove island.
Description
Technical field
The present invention relates to a kind of water supply systems of Combined Cycle Heat Recovery Boiler.
Background technology
The quick hair of the iterative method of process of industrialization since being opened with state reform, especially highly energy-consuming heavy industry
Exhibition, the generating set of Gas-steam Combined Cycle promoted the use of because of its high-effect, low emission advantage, as 9E,
The Large Gas-Steam Combined Cycles Cycle Unit such as 9F has been increasingly becoming the beneficial important supplement of electric system, in order to realize waste heat
Cascade utilization, current 9F grade Combined Cycle Heat Recovery Boilers are generally used three pressure systems.Using the joint of three pressure systems
The water supply system of circulation Waste-heat Boiler is as shown in Fig. 1, and condensed water enters water supply main road 1 through solidifying pump 12, then passes through water supply main road 1
On 15 outlet end of low-pressure drum respectively enter middle pressure water supply branch 2 and high-pressure feed water branch 3.In view of in above-mentioned water supply system
In, the high pressure water pump 32 in middle pressure feed pump 22 and high-pressure feed water branch 3 in middle pressure water supply branch 2 is the maximum consumption in stove island
Electric equipment, power consumption account for 80% or more of entire stove island electricity consumption, therefore middle pressure feed pump 22 and 32 operational efficiency of high pressure water pump
Height for stove island reduce power consumption it is very crucial to promote on-road efficiency.
But from the point of view of the content shown on attached drawing 1, following technological deficiency exists in the prior art：
1, since high-pressure feed water is derived from low-pressure drum 15, and the pressure difference between HP steam drum 35 and low-pressure drum 15 is larger,
Lift is higher, therefore high-pressure feed water branch 3 must be equipped with the high pressure water pump 32 of high lift, and the lift of high pressure water pump 32 is matched
It sets the higher cost of investment for not only causing stove island to increase, while high lift also causes unit operation power consumption to increase, and causes stove
The increase of island operating cost.
2, it is in and starts and when the operating mode of underrun in entire unit, due to middle pressure drum 25 and HP steam drum 35
It is relatively low to water demand, it is energy saving when in order to realize startup and underrun, therefore middle pressure feed pump 22 and high pressure water pump
32 must be respectively set middle pressure water supply speed regulation device 21 and high-pressure feed water speed regulation device 38, and this not only adds costs of investment, together
When also cause pump group operational efficiency relatively low, and since middle pressure feed pump 22 and high pressure water pump 32 start and underload rank entire
It is longer that section adjusts time run to low speed, and low speed runs pump group is caused to be in more severe operating status for a long time,
The service life of middle pressure feed pump 22 and high pressure water pump 32 can also be greatly shortened.
Invention content
Present invention is generally directed to solve the cost of investment height present in the prior art, the middle high-pressure water supply in unit operation
The technological deficiency that the way is low, energy consumption is higher, service life is short, provide a kind of cost of investment it is low, in unit operation in
High-pressure feed water the way is high, low energy consumption, the water supply system of Combined Cycle Heat Recovery Boiler with long service life.
What the present invention was mainly solved by following technical proposals in view of the above technical defects：The present invention includes by phase successively
The solidifying pump of connection, the water supply main road of condensation water heater, low pressure feed water operation console, low-pressure drum composition, export with low-pressure drum
The middle pressure water supply branch being connected is held, by being sequentially connected the high-pressure feed water arrival end connect, high-pressure feed water speed regulation device, high-pressure feed water
The high-pressure feed water branch of pump, high-pressure feed water operation console, high-pressure economizer, HP steam drum composition, it is characterised in that：Middle pressure water supply branch
Routing is sequentially connected the middle pressure feed pump connect, middle pressure economizer, middle pressure water-supplying operation platform, middle pressure drum composition, middle pressure feed pump
Arrival end be connected with the outlet end of low-pressure drum, high-pressure feed water arrival end with it is middle pressure economizer outlet end be connected.
Preferably, further including triple valve in high-pressure feed water branch, the entrance of triple valve is connected with high-pressure feed water arrival end
It connects, the outlet one of triple valve is connected with the arrival end of high-pressure feed water speed regulation device, and outlet two and the high-pressure feed water of triple valve are grasped
The arrival end for making platform is connected.
Therefore, the present invention is novel in design, reasonable for structure, has the following advantages：
One, since high-pressure feed water branch in the present invention is connected to the outlet end of middle pressure economizer, i.e. high-pressure feed water is derived from
In middle pressure water supply branch, compared with prior art, the lift of high-pressure feed water branch reduces 30% or more, therefore high pressure water pump
Lift configuration be greatly reduced, this not only reduces the costs of investment of unit, and the power consumption of high pressure water pump also substantially drops
Low, operational efficiency greatly improves；
Two, since the high-pressure feed water in the present invention is taken from middle pressure water supply branch, the middle pressure feed pump feelings constant in lift
Condition down-off increases 3 times or more, and the operational efficiency of middle pressure feed pump is substantially improved, though middle pressure feed pump unit starting with
It still remains larger rotating speed and operating load under the operating mode of underrun, avoids the low speed under long-time underload and run
The shortening of caused service life；
Three, since mesohigh feed-water intake of the present invention and middle pressure economizer exit are connected directly, middle pressure feed pump is extra to be raised
Journey can postpone to high pressure entrance of water-supplying pump, and middle pressure water supply branch road no longer needs to press water supply speed regulation device in setting, thus further
Reduce the cost of investment of unit；
Four, since high-pressure feed water is derived from the outlet end of middle pressure economizer, compared with prior art, high-pressure feed water arrival end
Feed temperature greatly improves, therefore the heating surface area of high-pressure economizer can be greatly decreased, this partial high pressure of reduction saves coal
Device heating surface can be converted into the heating surface of middle pressure economizer, and the material rate for manufacturing the portions under heat face can be reduced to by high pressure
Middle pressure, thus again reduce the cost of investment of unit.
Five, in the prioritization scheme of the present invention, high-pressure feed water branch road is also provided with triple valve, and high-pressure feed water arrival end is logical
Triple valve is crossed respectively to be connected with the arrival end of high-pressure feed water speed regulation device and high-pressure feed water operation console.When unit be in start or
When the operating mode of underrun, the extra lift of middle pressure feed pump is postponed to high-pressure feed water branch, and high-pressure feed water is by middle pressure feed pump
It provides and high-pressure feed water operation console is directly entered again via high-pressure economizer around high pressure water pump by the outlet of triple valve two
HP steam drum is reached, high pressure water pump can not start at this time, thus further reduced unit and starting and underrun work
Power consumption under condition to improve the on-road efficiency on entire stove island, while also effectively extending the service life of high pressure water pump.
Description of the drawings
Attached drawing 1 is the system schematic of the prior art；
Attached drawing 2 is the system schematic of an embodiment of the present invention；
Attached drawing 3 is the system schematic of another embodiment of the invention.
Specific implementation mode
Below with reference to the embodiments and with reference to the accompanying drawing being further described in detail to technical scheme of the present invention.
Embodiment 1：As shown in Fig. 2, the present invention includes water supply main road 1, middle pressure water supply branch 2, high-pressure feed water branch 3；
Water supply main road 1 is by being sequentially connected the solidifying pump 12 connect, condensation water heater 13, low pressure feed water operation console by connecting tube
14, low-pressure drum 15 forms；
Middle pressure water supply branch 2 by be sequentially connected by connecting tube the middle pressure feed pump 22 connect, middle pressure economizer 23, it is middle pressure to
The arrival end of water operation console 24, middle pressure drum 15 composition, middle pressure feed pump 22 is connected with the outlet end of low-pressure drum 15；
High-pressure feed water branch 3 is by the high-pressure feed water arrival end 31, the high-pressure feed water speed regulation device that are sequentially connected by connecting tube
38, high pressure water pump 32, high-pressure feed water operation console 34, high-pressure economizer 33, HP steam drum 35 form, high-pressure feed water arrival end 31
It is connected with the outlet end of middle pressure economizer 23.
In unit operation, condensed water is after solidifying pump 12 enters water supply main road 1 through being entered by the outlet end of low-pressure drum 15
Middle pressure water supply branch 2, the water supply from low-pressure drum 15 presses economizer 23 in entering after pressing feed pump 23 in, then in middle pressure
23 outlet end of economizer is divided into two-way, and pressure water-supplying operation platform 24 presses drum 25, a routing high-pressure feed water to enter in passing through all the way in entering
Mouth end 31 enters high-pressure feed water branch 3 and successively through high-pressure feed water speed regulation device 38, high pressure water pump 32, high-pressure feed water operation console
34 and high-pressure economizer 33 finally enter HP steam drum 35.Compared with prior art, middle pressure feed pump 22 feelings constant in lift
Under condition, flow increases 3 times or more, and for high pressure water pump 32 in the case where flow is constant, lift reduces 30% or more, therefore
The operational efficiency and service life of middle pressure feed pump 23 and high pressure water pump 32 are significantly promoted, the cost of investment of unit and operation
Energy consumption is greatly reduced.
Embodiment 2：As shown in Fig. 3, the present invention includes water supply main road 1, middle pressure water supply branch 2, high-pressure feed water branch 3；
Water supply main road 1 is by being sequentially connected the solidifying pump 12 connect, condensation water heater 13, low pressure feed water operation console by connecting tube
14, low-pressure drum 15 forms；
Middle pressure water supply branch 2 by be sequentially connected by connecting tube the middle pressure feed pump 22 connect, middle pressure economizer 23, it is middle pressure to
The arrival end of water operation console 24, middle pressure drum 15 composition, middle pressure feed pump 22 is connected with the outlet end of low-pressure drum 15；
High-pressure feed water branch 3 is by the high-pressure feed water arrival end 31, the high-pressure feed water speed regulation device that are sequentially connected by connecting tube
38, high pressure water pump 32, high-pressure feed water operation console 34, high-pressure economizer 33, HP steam drum 35 form, high-pressure feed water arrival end 31
It is connected with the outlet end of middle pressure economizer 23, high-pressure feed water branch 3 is additionally provided with triple valve 36, entrance and the height of triple valve 36
Pressure feed-water intake end 31 is connected, and the outlet one of triple valve 36 is connected with the arrival end of high-pressure feed water speed regulation device 38, threeway
The outlet two of valve 36 is connected with the arrival end of high-pressure feed water operation console 34.
When unit commitment runs and be in the operating mode of initial start stage or underrun, the outlet one of triple valve 36 is closed
（Outlet two）It opens, high pressure water pump 32 does not start operation.Condensed water is entered the low-pressure drum 15 of water supply main road 1 by solidifying pump 12,
Pressure water supply branch 2 in being entered again by the outlet end of low-pressure drum 15, after the water supply from low-pressure drum 15 presses feed pump 23 in
It is divided into two-way after pressing economizer 23 in, pressure water-supplying operation platform 24 presses drum 25, a routing high pressure to give in passing through all the way in entering
Water inlet end 31 enters and via triple valve 36（Outlet two）, high-pressure feed water operation console 34 and high-pressure economizer 33 enter high pressure vapour
Packet 35.It is and existing since middle pressure feed pump 23 assumes responsibility for the feedwater flow of middle pressure water supply branch 2 and high-pressure feed water branch 3 simultaneously
Technology is compared, and middle pressure feed pump 23 is significantly increased in the constant situation down-off of lift, therefore the operational efficiency of middle pressure feed pump 23
It is substantially improved；High pressure water pump 32 does not start operation at this time simultaneously, and high-pressure feed water is provided by the operation of middle pressure feed pump 22,
The a large amount of wastes for both having avoided the energy consumption caused by underrun at longer time of high pressure water pump 32 in this way, in turn avoid
The shortening of service life of the high pressure water pump 32 caused by underrun at longer time；
When unit load gradually rises, the steam parameter of HP steam drum 35 is stepped up, and the lift of high-pressure feed water branch 3 reaches
When to higher than the middle H-Max for pressing feed pump 23, the outlet one of triple valve 36 is opened（Outlet two is closed）, high pressure water pump 32
Start operation.The water supply entered by high-pressure feed water arrival end 31 is successively through triple valve 36（Outlet one）, high-pressure feed water speed regulation device
38, enter HP steam drum 35 after high pressure water pump 32, high-pressure feed water operation console 34 and high-pressure economizer 33.High pressure water pump 32
Lift and flow are stepped up under the adjusting control of high-pressure feed water speed regulation device 38 with the rising of unit load, until machine
Group reaches to be run under normal duty state.When unit, which is under normal duty, to be run, compared with prior art, middle pressure feed pump
23 are significantly increased in the constant situation down-off of lift, high pressure water pump 32 constant in flow and lift reduces 30% or more, because
The operational efficiency and service life of feed pump 23 and high pressure water pump 32 is pressed to be substantially improved in this, the cost of investment of unit and operation
Energy consumption is greatly reduced.
It is to be said to the present invention by the description to technical scheme of the present invention, accompanying drawings and embodiments as described above
It is bright, but be only intended to described in accompanying drawings and embodiments explanation and help understand the present invention, can not become the present invention improper restriction.
Equivalent or equivalent change and tune are made such as those skilled in the art technical solution, attached drawing or embodiment according to the present invention
The whole technical solution that is formed by is within the scope of the present invention.
Claims (1)
1. a kind of water supply system of Combined Cycle Heat Recovery Boiler includes by being sequentially connected the solidifying pump connect（12）, condensation water heater
（13）, low pressure feed water operation console（14）, low-pressure drum（15）The water supply main road of composition（1）, with the low-pressure drum（15）Go out
The middle pressure water supply branch that mouth end is connected（2）, by being sequentially connected the high-pressure feed water arrival end connect（31）, high-pressure feed water speed regulation device
（38）, high pressure water pump（32）, high-pressure feed water operation console（34）, high-pressure economizer（33）, HP steam drum（35）The high pressure of composition
Water supply branch（3）, it is characterised in that：Medium pressure water supply branch（2）By being sequentially connected the middle pressure feed pump connect（22）, middle pressure saves
Coal device（23）, middle pressure water-supplying operation platform（24）, middle pressure drum（25）Composition, medium pressure feed pump（2）Arrival end with it is described
Low-pressure drum（15）Outlet end be connected, the high-pressure feed water arrival end（31）With medium pressure economizer（23）Outlet end phase
Connection, the high-pressure feed water branch（3）In further include triple valve（36）, the triple valve（36）Entrance and the high-pressure feed water
Arrival end（31）It is connected, the triple valve（36）Outlet one and the high-pressure feed water speed regulation device（38）Arrival end be connected
It connects, the triple valve（36）Outlet two and the high-pressure feed water operation console（34）Arrival end be connected.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610641968.1A CN106338060B (en) | 2016-08-08 | 2016-08-08 | The water supply system of Combined Cycle Heat Recovery Boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610641968.1A CN106338060B (en) | 2016-08-08 | 2016-08-08 | The water supply system of Combined Cycle Heat Recovery Boiler |
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| Publication Number | Publication Date |
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| CN106338060A CN106338060A (en) | 2017-01-18 |
| CN106338060B true CN106338060B (en) | 2018-11-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610641968.1A Active CN106338060B (en) | 2016-08-08 | 2016-08-08 | The water supply system of Combined Cycle Heat Recovery Boiler |
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| CN114135858A (en) * | 2021-11-03 | 2022-03-04 | 中山嘉明电力有限公司 | Water feeding method and system applied to waste heat boiler |
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| CN102353037A (en) * | 2011-08-30 | 2012-02-15 | 上海申能临港燃机发电有限公司 | Water supply system of combined cycle generating unit |
| CN203605211U (en) * | 2013-10-28 | 2014-05-21 | 中国能源建设集团广东省电力设计研究院 | Water feeding system of boiler |
| CN203869020U (en) * | 2014-05-15 | 2014-10-08 | 东方日立锅炉有限公司 | Water supply system for combined-cycle waste heat boiler of heat supply unit |
| CN204187601U (en) * | 2014-10-15 | 2015-03-04 | 东方日立锅炉有限公司 | The high-pressure feed water system of Combined cycle gas-steam turbine waste heat boiler |
| CN204404162U (en) * | 2014-12-31 | 2015-06-17 | 中国能源建设集团山西省电力勘测设计院有限公司 | Combined cycle gas-steam turbine power plant water supply system |
| CN205957148U (en) * | 2016-08-08 | 2017-02-15 | 东方菱日锅炉有限公司 | Combined cycle exhaust -heat boiler's water supply system |
-
2016
- 2016-08-08 CN CN201610641968.1A patent/CN106338060B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102353037A (en) * | 2011-08-30 | 2012-02-15 | 上海申能临港燃机发电有限公司 | Water supply system of combined cycle generating unit |
| CN203605211U (en) * | 2013-10-28 | 2014-05-21 | 中国能源建设集团广东省电力设计研究院 | Water feeding system of boiler |
| CN203869020U (en) * | 2014-05-15 | 2014-10-08 | 东方日立锅炉有限公司 | Water supply system for combined-cycle waste heat boiler of heat supply unit |
| CN204187601U (en) * | 2014-10-15 | 2015-03-04 | 东方日立锅炉有限公司 | The high-pressure feed water system of Combined cycle gas-steam turbine waste heat boiler |
| CN204404162U (en) * | 2014-12-31 | 2015-06-17 | 中国能源建设集团山西省电力勘测设计院有限公司 | Combined cycle gas-steam turbine power plant water supply system |
| CN205957148U (en) * | 2016-08-08 | 2017-02-15 | 东方菱日锅炉有限公司 | Combined cycle exhaust -heat boiler's water supply system |
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