CN105605552A - Heat energy recycling device for steam exhaust of deaerator in boiler steam turbine system - Google Patents

Heat energy recycling device for steam exhaust of deaerator in boiler steam turbine system Download PDF

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Publication number
CN105605552A
CN105605552A CN201610145720.6A CN201610145720A CN105605552A CN 105605552 A CN105605552 A CN 105605552A CN 201610145720 A CN201610145720 A CN 201610145720A CN 105605552 A CN105605552 A CN 105605552A
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CN
China
Prior art keywords
heat exchanger
oxygen
steam
eliminating device
exhaust steam
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201610145720.6A
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Chinese (zh)
Inventor
刘建平
刘新杰
陈永山
杨军
徐丽美
雍红星
张晓婷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shandong Iron and Steel Group Co Ltd SISG
Original Assignee
Shandong Iron and Steel Group Co Ltd SISG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shandong Iron and Steel Group Co Ltd SISG filed Critical Shandong Iron and Steel Group Co Ltd SISG
Priority to CN201610145720.6A priority Critical patent/CN105605552A/en
Publication of CN105605552A publication Critical patent/CN105605552A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22STEAM GENERATION
    • F22DPREHEATING, 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
    • F22D1/00Feed-water heaters, i.e. economisers or like preheaters
    • F22D1/50Feed-water heaters, i.e. economisers or like preheaters incorporating thermal de-aeration of feed-water

Abstract

The invention belongs to the technical field of heat energy recycling, and particularly relates to a heat energy recycling device for steam exhaust of a deaerator in a boiler steam turbine system. The heat energy recycling device for the steam exhaust of the deaerator in the boiler steam turbine system is characterized in that a steam exhaust outlet of the deaerator is connected with a steam inlet of a surface heat exchanger through a steam inlet pipe, a flash condensed water outlet of the surface heat exchanger is connected with a water tank through a flash condensed water pipe, and the water tank is located below the surface heat exchanger. A water inlet of the surface heat exchanger is connected with a condensed water pipe, and a water outlet of the surface heat exchanger is connected with the deaerator through a water outlet pipe. According to the heat energy recycling device, the steam-exhaust-rapidly-condensed flash condensing technology is used, under the condition that cold sources are sufficient, steam exhaust can be cooled through heat exchanging, and meanwhile useful working media are heated so that the aim of recycling heat can be achieved.

Description

The heat-energy recovering apparatus of oxygen-eliminating device exhaust steam in a kind of boiler-turbine system
Technical field
The invention belongs to the technical field of energy recovery, be specifically related to the heat-energy recovering apparatus of oxygen-eliminating device exhaust steam in a kind of boiler-turbine system.
Background technology
Generally boiler is all furnished with oxygen-eliminating device, and oxygen-eliminating device Main Function carries out thermal de-aeration for feeding water by heating boiler, and it is that exhaust steam is discharged from the exhaust steam outlet of oxygen-eliminating device that oxygen is followed steam. Because exhaust steam is saturated vapor, but temperature is low, pressure is low, flow is little, therefore reclaims difficulty. Low and be saturated just because of the pressure of exhaust steam, steam quality is very low, therefore cannot carry out heat by common means and again reclaim.
Simultaneously oxygen-eliminating device requirement work is low by pressure pressure, and in running, once oxygen-eliminating device pressure operation will cause safety valve jumping up to 0.1MPa, heat diffuses increase, therefore how to ensure its operating pressure not superpressure become another one technical barrier.
Summary of the invention
The object of the invention is to for the defect of above-mentioned existence and the heat-energy recovering apparatus of oxygen-eliminating device exhaust steam in a kind of boiler-turbine system is provided, the solidifying technology of sudden strain of a muscle that this heat-energy recovering apparatus utilizes exhaust steam to condense rapidly, in the situation that low-temperature receiver is enough, can carry out the cooling of exhaust steam by heat exchange, heat useful working medium, to realize the object of heat recovery simultaneously.
Technical scheme of the present invention is: the heat-energy recovering apparatus of oxygen-eliminating device exhaust steam in a kind of boiler-turbine system, the exhaust steam outlet of oxygen-eliminating device is by the air inlet of admission line connecting surface formula heat exchanger, the solidifying water out of sudden strain of a muscle of surface-type heat exchanger coagulates waterpipe by sudden strain of a muscle and connects water tank, and wherein water tank is positioned at the below of surface-type heat exchanger; The water inlet of surface-type heat exchanger connects condensing water conduit, and the delivery port of surface-type heat exchanger is connected with oxygen-eliminating device by outlet conduit.
Described condensing water conduit is provided with pump, does not additionally consume the energy.
Described oxygen-eliminating device is atmospheric type deaerator.
Beneficial effect of the present invention is: in boiler-turbine system of the present invention the heat-energy recovering apparatus of oxygen-eliminating device exhaust steam utilize steam to dodge solidifying principle to carry out exhaust steam cooling fast, surface-type heat exchanger makes full use of the exhaust steam latent heat of vaporization steam turbine condensate water is heated, and absorbs low pressure, the Low Temperature Steam latent heat of vaporization completely; Exhaust steam is simultaneously dodged and is congealed into after water, utilizes siphon principle to reduce system and is pressed, and ensures not superpressure of its operating pressure.
The exhaust steam that oxygen-eliminating device produces exports by exhaust steam and admission line enters surface-type heat exchanger, carry out heat exchange with the boiler vapour stove electricity generation system condensate water entering in surface-type heat exchanger, exhaust steam is dodged solidifying at the quick cooling formation saturated vapor of the larger surface-type heat exchanger of heat exchange area, the latent heat of vaporization is filled and is absorbed by low-temperature receiver, produce local relative vacuum simultaneously, and the diameter that dodges solidifying waterpipe according to hydraulic pressure flow rate calculation to meet siphon condition, reach simultaneously and discharge complete requirement completely, guarantee the formation of local relative vacuum, this parital vacuum produces relative suction to exhaust steam, reduce being pressed of oxygen-eliminating device, make the operating temperature of oxygen-eliminating device reduce by 2 DEG C, simultaneously between surface-type heat exchanger and water tank the position relationship design forming of difference in height height of water level poor, thereby produce water potential energy and reduced the kinetic energy energy, and exhaust steam is produced to secondary phase to suction, twice kinetic energy combines and produces being pressed of enough gravitation reduction steam pipe line generations, realizes system pressure balance, the heat of exhaust steam is passed to coagulation hydroenergy backwater, realizes backwater and preheats, and so far the latent heat of vaporization all reclaims.
Exhaust steam low-grade heat is very low, but the latent heat of vaporization is very large, reaches 2200kJ/kg, has a high potential. Simultaneously boiler steamer electricity generation system condensing water temperature only has 45 DEG C, can be used as to stablize low-temperature receiver and carry out heat recovery. Cooling working medium is stable, and flow is enough.
The present invention utilizes to dodge and solidifying add the large principle of siphon two and combine, and makes full use of that nature condenses and the relatively low pressure environment of the poor formation of the flow of water reduces pipeline flow resistance, realizes system low by pressure drop, the object of oxygen-eliminating device efficiency increase. At heat exchange section, because not carrying out recycling of condensation demineralized water, what this system adopted is surface-type heat exchanger. Take into full account the output of deoxygenation exhaust steam, select enough large heat exchange area, select the low-temperature receiver of q.s simultaneously. To realize in relatively little space, saturated exhaust steam condenses into water in whole short time, forms local relative vacuum. In the solidifying water treatment of sudden strain of a muscle, to utilize oxygen-eliminating device difference in height to realize siphonage in order reducing costs, again to reduce system and pressed.
Described heat-energy recovering apparatus has following characteristics: the inner realization of (1), heat exchanger is dodged solidifying, and deoxygenation exhaust steam is all condensed; (2), realizing exhaust steam diffuses and reclaims mutual switching; (3), oxygen-eliminating device inflow temperature effectively promotes; (4), water tank collect exhaust steam dodge solidifying water can secondary utilization; (5), utilize height of water level poor, form relatively low pressure, improve oxygen-eliminating device efficiency, reduce steam consumption, not needing to increase water pump provides potential energy. This retracting device gross investment can reach 800,000 less than 70,000 yuan of actual wound effects year, and rate of return on investment is high. This is installed on and comes into operation in January, 2015, only 6.8 ten thousand yuan of investments. Through operation half a year, stable, effectively reclaim oxygen-eliminating device exhaust steam. Cut-off has produced actual benefit 51.2 ten thousand, economic benefits by the end of August.
In sum, the heat-energy recovering apparatus utilization of oxygen-eliminating device exhaust steam in this boiler-turbine system is dodged and is coagulated, siphon principle combines, and can utilize and dodge solidifying principle, dodges and coagulates steam Cheng Shui rapidly, reduces its flow resistance; And utilize syphon drainage principle, and reduce and dodge solidifying water out height, reduce system running pressure, realize low-quality, low pressure vapor heat recovery, increase without kinetic energy cost. Through actual motion more than half a year, implementation result is good. This plant investment is little, instant effect, and energy quick payoffs, improves boiler-turbine system entirety thermal effect, has benefit significantly; And reproducibility is strong, can be used for multiple minute-pressure, low-pressure gas heat recovery, promotional value is higher.
Brief description of the drawings
Fig. 1 is the structural representation of the heat-energy recovering apparatus of oxygen-eliminating device exhaust steam in boiler-turbine system in the specific embodiment of the invention.
Wherein, 1 is oxygen-eliminating device, and 2 is exhaust steam outlet, and 3 is admission line, and 4 is surface-type heat exchanger, and 5 is air inlet, and 6 for dodging solidifying water out, and 7 for dodging solidifying waterpipe, and 8 is water tank, and 9 is water inlet, and 10 is condensing water conduit, and 11 is delivery port, and 12 is outlet conduit, and 13 is pump.
Detailed description of the invention
Below by detailed description of the invention, the present invention will be described in detail.
The heat-energy recovering apparatus of oxygen-eliminating device exhaust steam in a kind of boiler-turbine system, the exhaust steam outlet 2 of oxygen-eliminating device 1 is by the air inlet 5 of admission line 3 connecting surface formula heat exchangers 4, the solidifying water out 6 of sudden strain of a muscle of surface-type heat exchanger 4 connects water tank 8 by dodging solidifying waterpipe 7, and wherein water tank 8 is positioned at the below of surface-type heat exchanger 4; The water inlet 9 of surface-type heat exchanger 4 connects condensing water conduit 10, and the delivery port 11 of surface-type heat exchanger 4 is connected with oxygen-eliminating device 1 by outlet conduit 12.
Described condensing water conduit is provided with pump 13.
Described oxygen-eliminating device 1 is atmospheric type deaerator.
The exhaust steam that oxygen-eliminating device 1 produces by exhaust steam export 2 and admission line 3 enter surface-type heat exchanger 4, carry out heat exchange with the boiler vapour stove electricity generation system condensate water entering in surface-type heat exchanger 4, exhaust steam is dodged solidifying at the quick cooling formation saturated vapor of the larger surface-type heat exchanger 4 of heat exchange area, the latent heat of vaporization is filled and is absorbed by low-temperature receiver, produce local relative vacuum simultaneously, and the diameter that dodges solidifying waterpipe 7 according to hydraulic pressure flow rate calculation to meet siphon condition, reach simultaneously and discharge complete requirement completely, guarantee the formation of local relative vacuum, this parital vacuum produces relative suction to exhaust steam, reduce being pressed of oxygen-eliminating device 1, make the operating temperature of oxygen-eliminating device 1 reduce by 2 DEG C, simultaneously between surface-type heat exchanger 4 and water tank 8 the position relationship design forming of difference in height height of water level poor, thereby produce water potential energy and reduced the kinetic energy energy, and exhaust steam is produced to secondary phase to suction, twice kinetic energy combines and produces being pressed of enough gravitation reduction steam pipe line generations, realizes system pressure balance, the heat of exhaust steam is passed to coagulation hydroenergy backwater, realizes backwater and preheats, and so far the latent heat of vaporization all reclaims.

Claims (3)

1. the heat-energy recovering apparatus of oxygen-eliminating device exhaust steam in a boiler-turbine system, it is characterized in that, the exhaust steam outlet of oxygen-eliminating device is by the air inlet of admission line connecting surface formula heat exchanger, the solidifying water out of sudden strain of a muscle of surface-type heat exchanger coagulates waterpipe by sudden strain of a muscle and connects water tank, and wherein water tank is positioned at the below of surface-type heat exchanger; The water inlet of surface-type heat exchanger connects condensing water conduit, and the delivery port of surface-type heat exchanger is connected with oxygen-eliminating device by outlet conduit.
2. the heat-energy recovering apparatus of oxygen-eliminating device exhaust steam in boiler-turbine system according to claim 1, is characterized in that, described condensing water conduit is provided with pump.
3. the heat-energy recovering apparatus of oxygen-eliminating device exhaust steam in boiler-turbine system according to claim 1, is characterized in that, described oxygen-eliminating device is atmospheric type deaerator.
CN201610145720.6A 2016-03-15 2016-03-15 Heat energy recycling device for steam exhaust of deaerator in boiler steam turbine system Pending CN105605552A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610145720.6A CN105605552A (en) 2016-03-15 2016-03-15 Heat energy recycling device for steam exhaust of deaerator in boiler steam turbine system

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Application Number Priority Date Filing Date Title
CN201610145720.6A CN105605552A (en) 2016-03-15 2016-03-15 Heat energy recycling device for steam exhaust of deaerator in boiler steam turbine system

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107062195A (en) * 2017-05-24 2017-08-18 广东理文造纸有限公司 Oxygen-eliminating device draining residual neat recovering system

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202973063U (en) * 2012-12-07 2013-06-05 浙江华建尼龙有限公司 Boiler feed water deoxidization degassing device
CN203364113U (en) * 2013-05-13 2013-12-25 山西太钢不锈钢股份有限公司 Draining waste steam pre-heating water supplying system of thermal deaerator
US20140007823A1 (en) * 2011-03-16 2014-01-09 Shanghai Fubo Ep Equipment Co., Ltd. Heating system for heating heat-transfer oil usingboiler flue gas
CN203904018U (en) * 2014-05-26 2014-10-29 河北钢铁股份有限公司邯郸分公司 Water recycling device for membrane type deaerator
CN204806368U (en) * 2015-06-11 2015-11-25 江苏永钢集团有限公司 Boiler feed water circulation deoxidization system in steam turbine power generation unit
CN205424891U (en) * 2016-03-15 2016-08-03 山东钢铁股份有限公司 Heat recovery unit of oxygen -eliminating device exhaust steam among boiler vapour turbine system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140007823A1 (en) * 2011-03-16 2014-01-09 Shanghai Fubo Ep Equipment Co., Ltd. Heating system for heating heat-transfer oil usingboiler flue gas
CN202973063U (en) * 2012-12-07 2013-06-05 浙江华建尼龙有限公司 Boiler feed water deoxidization degassing device
CN203364113U (en) * 2013-05-13 2013-12-25 山西太钢不锈钢股份有限公司 Draining waste steam pre-heating water supplying system of thermal deaerator
CN203904018U (en) * 2014-05-26 2014-10-29 河北钢铁股份有限公司邯郸分公司 Water recycling device for membrane type deaerator
CN204806368U (en) * 2015-06-11 2015-11-25 江苏永钢集团有限公司 Boiler feed water circulation deoxidization system in steam turbine power generation unit
CN205424891U (en) * 2016-03-15 2016-08-03 山东钢铁股份有限公司 Heat recovery unit of oxygen -eliminating device exhaust steam among boiler vapour turbine system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107062195A (en) * 2017-05-24 2017-08-18 广东理文造纸有限公司 Oxygen-eliminating device draining residual neat recovering system

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Application publication date: 20160525

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