CN101446410A - Method for recycling the afterheat of continuous blowdown extension tank and device thereof - Google Patents

Method for recycling the afterheat of continuous blowdown extension tank and device thereof Download PDF

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Publication number
CN101446410A
CN101446410A CNA2007102027070A CN200710202707A CN101446410A CN 101446410 A CN101446410 A CN 101446410A CN A2007102027070 A CNA2007102027070 A CN A2007102027070A CN 200710202707 A CN200710202707 A CN 200710202707A CN 101446410 A CN101446410 A CN 101446410A
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CN
China
Prior art keywords
continuous blowdown
flash vessel
eliminating
pipeline
water
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
CNA2007102027070A
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Chinese (zh)
Inventor
王志强
刘厚贵
罗旻
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.)
Guiyang Aluminum Magnesium Design and Research Institute Co Ltd
Original Assignee
Guiyang Aluminum Magnesium Design and Research Institute Co Ltd
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 Guiyang Aluminum Magnesium Design and Research Institute Co Ltd filed Critical Guiyang Aluminum Magnesium Design and Research Institute Co Ltd
Priority to CNA2007102027070A priority Critical patent/CN101446410A/en
Publication of CN101446410A publication Critical patent/CN101446410A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a method for recycling the afterheat of a continuous blowdown extension tank and a device thereof. Secondary steam discharged by a second stage continuous blowdown extension tank (6) is connected to an air deaerator (1) by a pipeline (2). Secondary steam discharged by a first stage continuous blowdown extension (5) is connected to a pressure deaerator (3) by a pipeline. The first stage continuous blowdown extension (5) and the second stage continuous blowdown extension tank (6) pass through drainage water of a boiler, the capacity of which is expanded, go into a raw water preheater, change heat with demineralized water, and then send demineralized water into the air deaerator (1) for reusing afterheat. The invention greatly reduces heat loss, increases utilization rate of soft water, provides guarantee for efficient running of boiler water, reduces running cost and maintenance cost, and improves working environment.

Description

The method and the device of the heat recovery of continuous blowdown flash vessel
Technical field:
The present invention relates to the method and the device of a kind of heat recovery in the steam power plant of alumina producer auxiliary construction.
Background technology:
In the coal-fired power plant of the steam power plant of aluminum oxide industry auxiliary construction or power industry, the salt content of the quality of the steam quality that boiler produced and stove water has direct relation.Though the process desalination is very little to water content, because the violent evaporation of stove water, the salt content of stove water is more much bigger than feedwater.For guaranteeing steam quality, the salt content that will keep stove water must not surpass certain quantity, so must carry out continuous blowdown to stove water.But so just attract a series of contradiction: keep the lower salt content of stove water, the necessary increase blowdown rate of making use of momentum like this because the stove coolant-temperature gage is higher, contains a large amount of heats, directly discharges if be not used, and will cause a large amount of losses of heat; Hot water just wastes.So, how when keeping the lower salt content of stove water, reduce thermal loss and just become an important research project.
At present, in present steam power plant's design, continuous blowdown system of boiler all adopts the method that the continuous blowdown flash vessel is set, but the platoon secondary vapour of discharging is directly discharged outside the factory building, hot water after the dilatation directly enters trench, has so just caused a large amount of thermal loss to influence environment with causing large stretch of white mist.
Summary of the invention:
The technical problem to be solved in the present invention is: a kind of method and device of heat recovery of continuous blowdown flash vessel are provided, and it can make full use of waste heat, saves a large amount of heats, makes the operation of boiler unit have more efficiently.
The present invention is achieved in that boiler blowdown water enters one-level continuous blowdown flash vessel (5) and secondary continuous blowdown flash vessel (6) dilatation successively.Secondary continuous blowdown flash vessel (6) pressure is lower, and the secondary vapour of discharge has certain heat, carries out heat exchange and deoxygenation, the utilization again of boiler of feeding with regard to directly entering atmosphere oxygen-eliminating device (1) through pipeline (2).And one-level continuous blowdown flash vessel (5) pressure is high slightly, and the secondary vapour of discharge enters pressure oxygen-eliminating device (3) through pipeline (4) and carries out heat exchange and deoxygenation, the utilization once more of boiler of feeding.
Through the boiler blowdown water after one-level continuous blowdown flash vessel (5) and secondary continuous blowdown flash vessel (6) dilatation with enter the demineralized water that unboiled water gives hot device (7) and carry out heat exchange, demineralized water is sent into the utilization once more that atmosphere oxygen-eliminating device (1) carries out waste heat through pipeline (9).
Among the present invention, under the normal condition of production, valve (11) (13) (14) (15) (16) (17) is in the full open state, and valve (12) is in full closing state; Under accident condition or service mode, valve (11) (12) (14) (15) (16) (17) is in the full open state, and valve (13) is in full closing state.
The present invention compared with prior art, because the secondary vapour of continuous blowdown flash vessel and all inserted oxygen-eliminating device with demineralized water that boiler blowdown water after the dilatation carries out heat exchange, so just saved a large amount of heats, for the efficient operation of boiler provides assurance, reduce operating cost and maintenance cost, improved working environment.
Description of drawings:
Fig. 1 is a flow chart of the present invention.
The specific embodiment:
Embodiments of the invention: the secondary vapor outlet and the soft water outlet that connect one-level continuous blowdown flash vessel 5 and secondary continuous blowdown flash vessel 6, insert atmosphere oxygen-eliminating device 1 and pressure oxygen-eliminating device 3 respectively through pipeline 2,4, one-level continuous blowdown flash vessel 5 and secondary continuous blowdown flash vessel 6 enter unboiled water through the hot water after the dilatations by pipeline 8 and give hot device 7 and carry out after the heat exchange by pipeline 9 demineralized water being sent into again, and atmosphere oxygen-eliminating device 1 carries out the utilization once more of waste heat.The boiler blowdown water that finishes heat exchange directly drains into decides row's flash vessel.Between pipeline 9,10, be separately installed with valve 11,12,13,14, valve 15 is installed on pressure oxygen-eliminating device 3, valve 16,17 is installed on atmosphere oxygen-eliminating device 1.Under the normal condition of production, valve 11,13,14,15,16,17 is in the full open state, and valve 12 is in full closing state; Under accident condition or service mode, valve 11,12,14,15,16,17 is in the full open state, and valve 13 is in full closing state.

Claims (3)

  1. [claim 1] a kind of continuous blowdown flash vessel heat recovery method, it is characterized in that: secondary continuous blowdown flash vessel (6) the secondary vapour of discharging is connected to atmosphere oxygen-eliminating device (1) through pipeline (2), one-level continuous blowdown flash vessel (5) the secondary vapour of discharging is connected to pressure oxygen-eliminating device (3) through pipeline (4), and one-level continuous blowdown flash vessel (5) and secondary continuous blowdown flash vessel (6) enter unboiled water through the hot water after the dilatation and give that hot device (7) carries out sending into atmosphere oxygen-eliminating device (1) after the heat exchange and pressure oxygen-eliminating device (3) carries out the utilization once more of waste heat.
  2. The device of [claim 2] a kind of continuous blowdown flash vessel heat recovery method as claimed in claim 1, it comprises one-level continuous blowdown flash vessel (5), secondary continuous blowdown flash vessel (6), it is characterized in that: secondary continuous blowdown flash vessel (6) connects atmosphere oxygen-eliminating device (1) by pipeline (2), one-level continuous blowdown flash vessel (5) connects pressure oxygen-eliminating device (3) by pipeline (4), atmosphere oxygen-eliminating device (1), pressure oxygen-eliminating device (3) connects unboiled water by pipeline (8) and gives hot device (7), and unboiled water gives hot device (7) and is connected to one-level continuous blowdown flash vessel (5) again by pipeline (9), secondary continuous blowdown flash vessel (6).
  3. The device of [claim 3] continuous blowdown flash vessel according to claim 2 heat recovery method, it is characterized in that: between pipeline (9), (10), be separately installed with valve (11), (12), (13), (14), valve (15) is installed on pressure oxygen-eliminating device (3), valve (16), (17) are installed on atmosphere oxygen-eliminating device (1).
CNA2007102027070A 2007-11-27 2007-11-27 Method for recycling the afterheat of continuous blowdown extension tank and device thereof Pending CN101446410A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNA2007102027070A CN101446410A (en) 2007-11-27 2007-11-27 Method for recycling the afterheat of continuous blowdown extension tank and device thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNA2007102027070A CN101446410A (en) 2007-11-27 2007-11-27 Method for recycling the afterheat of continuous blowdown extension tank and device thereof

Publications (1)

Publication Number Publication Date
CN101446410A true CN101446410A (en) 2009-06-03

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CNA2007102027070A Pending CN101446410A (en) 2007-11-27 2007-11-27 Method for recycling the afterheat of continuous blowdown extension tank and device thereof

Country Status (1)

Country Link
CN (1) CN101446410A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102022720A (en) * 2010-11-01 2011-04-20 中材节能发展有限公司 Water-supply capacity-expansion deaerator
CN103388817A (en) * 2013-07-16 2013-11-13 广西华锐钢铁工程设计咨询有限责任公司 Residual heat recovery system of sewage water of coke dry quenching boiler
WO2016116056A1 (en) * 2015-01-23 2016-07-28 关文吉 Sewage draining, deaerating, and water feeding system
CN105910089A (en) * 2016-06-12 2016-08-31 中国华电科工集团有限公司 Thermal power plant boiler blow-off water waste heat recycling system
CN107166369A (en) * 2017-04-27 2017-09-15 新奥泛能网络科技股份有限公司 Water supply system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102022720A (en) * 2010-11-01 2011-04-20 中材节能发展有限公司 Water-supply capacity-expansion deaerator
CN103388817A (en) * 2013-07-16 2013-11-13 广西华锐钢铁工程设计咨询有限责任公司 Residual heat recovery system of sewage water of coke dry quenching boiler
WO2016116056A1 (en) * 2015-01-23 2016-07-28 关文吉 Sewage draining, deaerating, and water feeding system
CN105910089A (en) * 2016-06-12 2016-08-31 中国华电科工集团有限公司 Thermal power plant boiler blow-off water waste heat recycling system
CN107166369A (en) * 2017-04-27 2017-09-15 新奥泛能网络科技股份有限公司 Water supply system

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Open date: 20090603