CN104727869B - Cogeneration units and boiler startup steam discharge thereof utilize method - Google Patents

Cogeneration units and boiler startup steam discharge thereof utilize method Download PDF

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Publication number
CN104727869B
CN104727869B CN201310715040.XA CN201310715040A CN104727869B CN 104727869 B CN104727869 B CN 104727869B CN 201310715040 A CN201310715040 A CN 201310715040A CN 104727869 B CN104727869 B CN 104727869B
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pipeline
boiler
valve
stand
steam
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CN104727869A (en
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杨军锋
王建平
郭春
张卫星
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Elion Technology Wuwei Co ltd
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Elion Resources Group Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/14Combined heat and power generation [CHP]
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00Climate change mitigation technologies for sector-wide applications
    • Y02P80/10Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
    • Y02P80/15On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply

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  • Control Of Steam Boilers And Waste-Gas Boilers (AREA)

Abstract

A kind of cogeneration units and boiler startup steam discharge thereof utilize method, the 5th pipeline, the 5th valve is increased before first valve of this cogeneration units on existing structure basis on the first pipeline that each boiler connects, 5th pipeline is communicated with the development unit on the 6th pipeline, and make the 5th pipeline and be connected the 7th pipeline, the 7th valve between female pipe, and the 7th pipeline is communicated with reducing-and-cooling plant entrance.When boiler operation all breaks down, stand-by boiler is started with nominal parameter, a large amount of low level steam that this process produces by first, five, seven, pipeline, female Guan Ji tetra-pipeline enter customer equipment, until stand-by boiler operating conditions meets normal boiler operation operating conditions, first valve open is incorporated to the normal operation of female pipe, close the 5th valve, thus realize a large amount of low level steam produced in stand-by boiler start-up course all to recycle, solve the waste of stand-by boiler heat energy and water in start-up course, add generator power output simultaneously.

Description

Cogeneration units and boiler startup steam discharge thereof utilize method
Technical field
The present invention relates to a kind of boiler hot vapour and utilize technology, refer in particular to a kind of cogeneration units and boiler startup steam discharge utilizes method.
Background technique
Cogeneration units is that in existing co-generator group, the steam that boiler produces in start-up course is all discharged in air, wastes a large amount of heat energy and water.Urban heat supplying, factory steam, all be unable to do without boiler, because the equipment attrition such as boiler milling system, water cooled furnace wall is larger, equipment failure is frequent, cause opening heat number to increase, stand-by boiler is all that nominal parameter starts at every turn, in increasing temperature and pressure process, waste a large amount of heat energy and water.
As shown in Figure 1, it is existing cogeneration units structural representation, it comprises three boilers 1 ', the outlet of each boiler 1 ' connects the first pipeline 2 ' respectively, the first valve 3 ' installed respectively by each first pipeline 2 ', three the first pipelines 2 ' are connected with female pipe 11 ', female pipe 11 ' is upper installs female tube valve 12 ', female pipe 11 ' is connected with two second pipes 4 ', each second pipe 4 ' installs the second valve 5 ' respectively, the other end of each second pipe 4 ' is connected with the automatic throttle of steam turbine 6 ' respectively, the main shaft of each steam turbine 6 ' is connected with the main shaft of generator 7 ' respectively, industry on each steam turbine 6 ' is connected with the 3rd pipeline 8 ' respectively for steam ports, the 3rd valve 9 ' installed respectively by each 3rd pipeline 8 ', the other end of two the 3rd pipelines 8 ' is connected with customer equipment 10 ', female the other end of pipe 11 ' is connected with the suction port of temperature-decreased pressure reducer 13 ', and the air outlet of temperature-decreased pressure reducer 13 ' is connected with the 5th pipeline 14 ', and upper installation the 5th valve 15 ' of the 5th pipeline 14 ', the other end of the 5th pipeline 14 ' is connected with customer equipment 10 '.The working procedure of this existing cogeneration of heat and power structure is: water is changed into high-temperature steam (heat energy) by coal combustion, combustion gas (chemical energy) by multiple boiler 1 ', high-order steam (heat energy) enters in two steam turbine 6 ' by three the first pipelines 2 ', female pipe 11 ' and two second pipes 4 ', thermal energy is become mechanical energy by steam turbine 6 ', and changes mechanical energy is become electric energy by generator 7 '.In cogeneration units, steam turbine 6 ' part was done the low level steam of merit by the 3rd pipeline 8 ' and the 3rd valve 9 ' supply customer equipment 10 ' (such as urban heat supplying, factory steam etc.), when maybe can not meet the vapour amount of user when steam turbine 6 ' breaks down, the high-order steam that boiler 1 ' produces to after high-order steam temperature reducing and pressure reducing, produces the steam supply customer equipment 10 ' of low level by the first pipeline 2 ', female pipe 11 ', temperature-decreased pressure reducer 13 '.In above-mentioned cogeneration units, in order to ensure to supply low level steam qualified continuously to customer equipment 10 ', a boiler 1 ' must be had to be in stand-by state, when other boiler operation 1 ' breaks down, this stand-by boiler 1 ' is incorporated to system after starting with its nominal parameter, but existing stand-by boiler 1 ' starts in steam-operating process with nominal parameter, produces a large amount of low level steam and has all been discharged in the middle of air, cause a large amount of heat energy and the waste of water.
Summary of the invention
A kind of cogeneration units and boiler startup steam discharge thereof is the object of the present invention is to provide to utilize method, stand-by boiler can all be recycled with a large amount of low level steam produced in nominal parameter start-up course by it, solve the heat energy of stand-by boiler in start-up course and the waste of water, the generated energy of generator can also be increased simultaneously.
To achieve these goals, the invention provides a kind of cogeneration units, comprise multiple stage boiler, each described boiler export connects the first pipeline respectively, the first valve installed respectively by each described first pipeline, multiple first pipeline is connected with female pipe, described mother's pipe is connected with multiple second pipe, described mother's pipe is upper installs female tube valve, each second pipe installs the second valve respectively, each second pipe the other end is connected with steam turbine respectively, each steam turbine is connected with generator respectively, industry on each steam turbine is connected with the 3rd pipeline respectively for steam ports, the 3rd valve installed respectively by each 3rd pipeline, each 3rd pipeline the other end is connected with customer equipment, described female pipe the other end is connected with the suction port of temperature-decreased pressure reducer, the air outlet of described temperature-decreased pressure reducer is connected with the 4th pipeline, the 4th valve installed by 4th pipeline, the 4th pipeline the other end is connected with customer equipment, the 5th pipeline is connected respectively before wherein each described first pipeline being positioned at the first valve, the 5th valve installed respectively by each 5th pipeline, each 5th pipeline the other end is connected with the 6th pipeline, the 6th valve installed by described 6th pipeline, the described 6th pipeline the other end is connected with development unit, described 5th pipeline be connected the 7th pipeline between female pipe, described 7th pipeline is connected to the position on female pipe between female tube valve and temperature-decreased pressure reducer, the 7th valve installed by described 7th pipeline.
The boiler startup steam discharge of described cogeneration units utilizes a method, and it comprises the steps:
(1) by multiple stage boiler at least one as stand-by boiler, all the other are as normal boiler operation, when normal boiler operation breaks down, one or more stand-by boiler need be started, by the emptying valve closing on stand-by boiler, and the first valve closing on the first pipeline that stand-by boiler is connected, start the very low steam of initial generation in stand-by boiler process not drain in air, open the 5th valve on stand-by boiler 1 linking route and the 6th valve simultaneously, the very low steam produced by stand-by boiler is by the first pipeline, 5th pipeline, 6th pipeline is delivered in development unit, steam flow in first pipeline is increased, first pipeline temperature rise is accelerated,
(2) when each stand-by boiler increasing temperature and pressure is to the low level vapor pressure, the temperature that meet required for customer equipment, close the 6th valve on the 6th pipeline, open the 7th valve on the 7th pipeline and the 4th valve on the 4th pipeline, make the steam of each stand-by boiler start-up course supply customer equipment by temperature-decreased pressure reducer;
(3) until when stand-by boiler operating conditions meets normal boiler operation operating conditions, by the first valve open, by the 5th valve, the 7th valve, the 4th valve closing;
(4) now high-order steam is entered each steam turbine by the first pipeline and second pipe by each stand-by boiler, each steam turbine acting is mechanical energy by thermal energy, changes mechanical energy is electric energy by generator that each steam turbine connects again, the low level steam that wherein steam turbine part did merit enters customer equipment through the 3rd pipeline, provides customer equipment heat energy.
Described development unit is pressure development unit.
After adopting such scheme, cogeneration units of the present invention is by increasing the 6th pipeline and the 6th valve before the first valve on each first pipeline, each 6th pipeline is communicated with development unit by the 7th pipeline, when multiple boiler operation breaks down, cut off the first valve on the first pipeline that each stand-by boiler connects, make each stand-by boiler with a large amount of low level steam produced in nominal parameter start-up course by first, five, seven pipelines, female pipe, 4th pipeline enters in customer equipment and heats, until when the operating conditions of each stand-by boiler meets normal boiler operation operating conditions, by the first valve open on each stand-by boiler linking route, by the 5th, seven, four valve closings, thus achieve stand-by boiler is all recycled with a large amount of low level steam produced in nominal parameter start-up course, solve the waste of stand-by boiler heat energy and water in start-up course, in addition because each stand-by boiler provides a large amount of low level steam to customer equipment, make each stand-by boiler enter normally run time, the extraction steam for factories amount of steam turbine reduces, this part steam reduced continues acting generating, increase generator power output.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing cogeneration units;
Fig. 2 is the structural representation of cogeneration units of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described, can better understand the present invention and can be implemented, but illustrated embodiment is not as a limitation of the invention to make those skilled in the art.
As shown in Figure 2, cogeneration units of the present invention, comprises three boilers 1, and the outlet of each boiler 1 connects the first pipeline 2 respectively, each first pipeline 2 is installed respectively the first valve 3, three the first pipelines 2 and female pipe 11 vertical connection, female tube valve 12 installed by female pipe 11.One end vertical connection of female pipe 11 and two second pipes 4, each second pipe 4 is installed respectively the second valve 5, the other end of each second pipe 4 is connected with a steam turbine 6 respectively, and the main shaft of each steam turbine 6 is linked together by coupling with the main shaft of generator 7 respectively.Industry on each steam turbine 6 is connected with the 3rd pipeline 8 respectively for steam ports, and the other end each 3rd pipeline 8 being installed respectively the 3rd valve 9, two the 3rd pipelines 8 is connected with customer equipment 10.Customer equipment 10 can be urban heat supplying equipment or factory steam equipment etc. herein.The left end of female pipe 11 is connected with the suction port of temperature-decreased pressure reducer 13, the air outlet of temperature-decreased pressure reducer 13 is connected with the 4th pipeline 14, the 4th valve 15 installed by 4th pipeline 14, the other end of the 4th pipeline 14 is connected with customer equipment 10, the 5th pipeline 16 is connected respectively before wherein each first pipeline 2 being positioned at the first valve 3, the 5th valve 17 installed respectively by each 5th pipeline 16, the other end of each 5th pipeline 16 is connected with the 6th pipeline 18, the 6th valve 19 installed by 6th pipeline 18, 6th pipeline 18 the other end is connected with pressure development unit 20, the 7th pipeline 21 is connected between 5th pipeline 16 with female pipe 11, the 7th valve 22 installed by 7th pipeline 21, 7th pipeline 21 is connected to the position on female pipe 11 between female tube valve 12 and temperature-decreased pressure reducer 13.
The boiler startup steam discharge of above-mentioned cogeneration units utilizes and comprises the steps:
(1) will wherein at least one boiler 1 as stand-by boiler, all the other boilers 1 are as normal boiler operation, when normal boiler operation breaks down, start stand-by boiler 1, emptying valve (not shown) on stand-by boiler 1 is closed, and the first valve 3 on the first pipeline 2 connected by stand-by boiler 1 is closed, start the very low steam of initial generation in stand-by boiler 1 process not drain in air, open the 5th valve 17 on the 5th pipeline 16 of stand-by boiler 1 linking route and the 6th valve 19 on the 6th pipeline 18 simultaneously, the very low steam produced by stand-by boiler 1 is by the first pipeline 2, 5th pipeline 16, 6th pipeline 18 is delivered in development unit 20, steam flow in first pipeline 2 is increased, first pipeline 2 heats up and accelerates, first pipeline 2 temperature is consistent with stand-by boiler warming temperature, first pipeline 2 heating coil time shorten, stand-by boiler 1 shortening starting time, stand-by boiler 1 starts required amount of fuel and reduces,
(2) when stand-by boiler 1 increasing temperature and pressure is to the low level vapor pressure, the temperature that meet required for customer equipment, close the 6th valve 19 on the 6th pipeline 18, open the 7th valve 22 on the 7th pipeline 21 and the 4th valve 15 on the 4th pipeline 14, the steam of stand-by boiler 1 start-up course is made to supply customer equipment 10 by temperature-decreased pressure reducer 13, in addition, while the steam supply customer equipment 10 of stand-by boiler 1 start-up course, the extraction steam for factories amount of steam turbine 6 reduces, this part steam reduced continues acting generating, increases the generated energy of generator 7;
(3) until when stand-by boiler 1 operating conditions meets normal boiler operation operating conditions, the first valve 3 on the first pipeline 2 connected by stand-by boiler 1 is opened, and the 4th valve 15 on the 5th valve 17 on the 5th pipeline 16, the 7th valve 22 on the 7th pipeline 21, the 4th pipeline 14 is closed;
(4) now high-order steam enters in each steam turbine 6 by the first pipeline 2, second pipe 4 by stand-by boiler 1, it is mechanical energy that each steam turbine 6 does work by thermal energy, changes mechanical energy is electric energy by generator 7 that each steam turbine 6 connects again, the low level steam that wherein steam turbine 6 part did merit enters customer equipment 10 through the 3rd pipeline 8, provides customer equipment 10 heat energy.
Cogeneration units of the present invention is designed by said structure, make stand-by boiler 1 with a large amount of low level steam produced in nominal parameter start-up course all successively by the first pipeline 2, 5th pipeline 16, 7th pipeline 21, female pipe 11 and the 4th pipeline 14 enter in customer equipment 10 and heat, until when the operating conditions of each stand-by boiler 1 meets normal boiler operation operating conditions, the first valve 3 on each stand-by boiler 1 linking route is opened, by the 5th valve 17, 7th valve 22, 4th valve 15 is closed, thus achieve stand-by boiler 1 is all recycled with a large amount of low level steam produced in nominal parameter start-up course, solve the waste of stand-by boiler 1 heat energy and water in start-up course, in addition because each stand-by boiler 1 provides a large amount of low level steam to customer equipment 10, make each stand-by boiler 1 enter normally run time, the extraction steam for factories amount of steam turbine 6 reduces, this part steam reduced continues acting generating, increase the generated energy of generator 7.
The above embodiment is only that protection scope of the present invention is not limited thereto in order to absolutely prove the preferred embodiment that the present invention lifts.The equivalent alternative or conversion that those skilled in the art do on basis of the present invention, all within protection scope of the present invention.Protection scope of the present invention is as the criterion with claims.

Claims (3)

1. a cogeneration units, comprise multiple stage boiler, each described boiler export connects the first pipeline respectively, the first valve installed respectively by each described first pipeline, multiple first pipeline is connected with female pipe, described mother's pipe is connected with multiple second pipe, described mother's pipe is upper installs female tube valve, each second pipe installs the second valve respectively, each second pipe the other end is connected with steam turbine respectively, each steam turbine is connected with generator respectively, industry on each steam turbine is connected with the 3rd pipeline respectively for steam ports, the 3rd valve installed respectively by each 3rd pipeline, each 3rd pipeline the other end is connected with customer equipment, described female pipe the other end is connected with the suction port of temperature-decreased pressure reducer, the air outlet of described temperature-decreased pressure reducer is connected with the 4th pipeline, the 4th valve installed by 4th pipeline, the 4th pipeline the other end is connected with customer equipment, it is characterized in that: before each described first pipeline is positioned at the first valve, connect the 5th pipeline respectively, the 5th valve installed respectively by each 5th pipeline, each 5th pipeline the other end is connected with the 6th pipeline, the 6th valve installed by described 6th pipeline, the described 6th pipeline the other end is connected with development unit, described 5th pipeline be connected the 7th pipeline between female pipe, described 7th pipeline is connected to the position on female pipe between female tube valve and temperature-decreased pressure reducer, the 7th valve installed by described 7th pipeline.
2. the boiler startup steam discharge of cogeneration units according to claim 1 utilizes a method, and it comprises the steps:
(1) by multiple stage boiler at least one as stand-by boiler, all the other are as normal boiler operation, when normal boiler operation breaks down, one or more stand-by boiler need be started, by the emptying valve closing on stand-by boiler, and the first valve closing on the first pipeline that stand-by boiler is connected, start the initial steam produced in stand-by boiler process not drain in air, open the 5th valve on stand-by boiler (1) linking route and the 6th valve simultaneously, the steam produced by stand-by boiler is by the first pipeline, 5th pipeline, 6th pipeline is delivered in development unit, steam flow in first pipeline is increased, first pipeline temperature rise is accelerated,
(2) when each stand-by boiler increasing temperature and pressure is to the low level vapor pressure, the temperature that meet required for customer equipment, close the 6th valve on the 6th pipeline, open the 7th valve on the 7th pipeline and the 4th valve on the 4th pipeline, make the steam of each stand-by boiler start-up course supply customer equipment by temperature-decreased pressure reducer;
(3) until when stand-by boiler operating conditions meets normal boiler operation operating conditions, by the first valve open, by the 5th valve, the 7th valve, the 4th valve closing;
(4) now high-order steam is entered each steam turbine by the first pipeline and second pipe by each stand-by boiler, each steam turbine acting is mechanical energy by thermal energy, changes mechanical energy is electric energy by generator that each steam turbine connects again, the low level steam that wherein steam turbine part did merit enters customer equipment through the 3rd pipeline, provides customer equipment heat energy.
3. the boiler startup steam discharge of cogeneration units according to claim 2 utilizes method, it is characterized in that: described development unit is pressure development unit.
CN201310715040.XA 2013-12-23 2013-12-23 Cogeneration units and boiler startup steam discharge thereof utilize method Active CN104727869B (en)

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CN107289426A (en) * 2017-07-12 2017-10-24 神华集团有限责任公司 Header system boiler vapour system
CN110513165B (en) * 2019-09-04 2021-11-16 深圳万润综合能源有限公司 Combined cooling heating and power supply distributed energy system

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GB765223A (en) * 1954-01-22 1957-01-09 British Thomson Houston Co Ltd Improvements relating to steam turbine plant
JP2005214047A (en) * 2004-01-28 2005-08-11 Toshiba Corp Combined cycle power generation plant and method of operating the same
JP5183305B2 (en) * 2008-06-06 2013-04-17 中国電力株式会社 Startup bypass system in steam power plant
CN201540039U (en) * 2009-06-10 2010-08-04 章礼道 Condenser enabling DC furnace start-up drainage and low-voltage bypass to share energy dissipating device
CN102175021B (en) * 2011-01-27 2013-04-03 章礼道 Pump-free direct current furnace starting system capable of recycling working medium and heat comprehensively

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Effective date of registration: 20180321

Address after: 733000 Gansu Wuwei Industrial Park Management Committee, Liangzhou District, Wuwei, Gansu

Patentee after: ELION TECHNOLOGY (WUWEI) CO.,LTD.

Address before: 100031 Beijing city Xicheng District fuxingmennei Street No. 28 East Chemsunny World Trade Center 6 story

Patentee before: ELION RESOURCES Group

CB03 Change of inventor or designer information
CB03 Change of inventor or designer information

Inventor after: Yang Junfeng

Inventor after: Wang Jianping

Inventor after: Guo Chun

Inventor after: Zhang Weixing

Inventor before: Yang Junfeng

Inventor before: Wang Jianping

Inventor before: Guo Chun

Inventor before: Zhang Weixing

PE01 Entry into force of the registration of the contract for pledge of patent right
PE01 Entry into force of the registration of the contract for pledge of patent right

Denomination of invention: Combined heat and power generation units and their boiler start-up and exhaust methods

Granted publication date: 20160302

Pledgee: Wuwei Branch of Bank of Lanzhou Co.,Ltd.

Pledgor: ELION TECHNOLOGY (WUWEI) CO.,LTD.

Registration number: Y2024980002128