CN101879379A - Gas exhausting and water containing system and method for lithium bromide recycling desulfurization system - Google Patents

Gas exhausting and water containing system and method for lithium bromide recycling desulfurization system Download PDF

Info

Publication number
CN101879379A
CN101879379A CN 201010223991 CN201010223991A CN101879379A CN 101879379 A CN101879379 A CN 101879379A CN 201010223991 CN201010223991 CN 201010223991 CN 201010223991 A CN201010223991 A CN 201010223991A CN 101879379 A CN101879379 A CN 101879379A
Authority
CN
China
Prior art keywords
lithium bromide
water
exchanger
pipeline
bromide refrigerator
Prior art date
Application number
CN 201010223991
Other languages
Chinese (zh)
Other versions
CN101879379B (en
Inventor
谭厚章
司纪朋
王学斌
牛艳青
Original Assignee
西安交通大学
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 西安交通大学 filed Critical 西安交通大学
Priority to CN2010102239911A priority Critical patent/CN101879379B/en
Publication of CN101879379A publication Critical patent/CN101879379A/en
Application granted granted Critical
Publication of CN101879379B publication Critical patent/CN101879379B/en

Links

Abstract

The invention relates to a gas exhausting and water containing system and a gas exhausting and water containing method for a lithium bromide recycling desulfurization system. The front section of the inlet of a chimney is provided with a surface heat exchanger; steam extracted from the low-pressure section of a steam turbine is delivered into a lithium bromide refrigerator to produce cold water; the cold water produced by the lithium bromide refrigerator is delivered into the surface heat exchanger to exchange heat with flue gas, so that water vapor in the flue gas is condensed; and the surface heat exchanger is provided with a groove-shaped passage for collecting condensed water. The system and the method have a great significance for water conservation in power plants, particularly northern arid regions lacking water resources. In the method, refrigeration is directly performed by using steam not electricity, so that loss caused by the transformation of steam to electricity to coldness is eliminated.

Description

The moisture system and method for desulphurization system exhaust is reclaimed in a kind of lithium bromide circulation
Technical field
The invention belongs to the energy-saving and emission-reduction field, relate to the moisture system and method for lithium bromide circulation recovery desulphurization system exhaust in a kind of large-scale power station.
Background technology
China's thermal power output accounts for national gross generation more than 80%, and the water consumption in thermal power plant is huge.Whole nation water resource communique and industry statistic show: national thermoelectricity water consumption accounts for 45% of industrial water consumption.According to statistics, the average water consumption of power plants is 3.1~3.5kg/ (kw.h), and the electrical generation water of developed country consumption is 2.52kg/ (kWh), and water consumption in power plant, South Africa only is 1.25kg/ (kWh), therefore, be still an engineering of shouldering heavy responsibilities at the power plants water-saving engineering.Especially now large thermal power plant adopts wet desulfurization system mostly, and flue gas after desulfurization carries a large amount of steam and enters flue and chimney, causes power plant's water consumption huge.The dry method desulfuration system that operating cost is higher, desulfuration efficiency is lower but can economize on water is often had to adopt in the water shortage in north china area.
Water use sector in the typical case power plant is divided into recirculating cooling water system, chemical deionization water system (boiler feed water system), lime-ash water system, industrial cooling circulating water system, life and fire fighting water system, miscellaneous water system and desulfurization water system.Thermal power plant will economize on water, and then must start with from these several respects.
Mainly contain following several water saving measures at present: (1) waste water is recycled, and realizes full factory waste water zero discharge; (2) improve the recirculated water concentration rate; (3) improvement of ash disposal system; (4) adopt air cooling technique; (5) the watermeter scale being installed also regularly monitors water quality; (6) water-steam system optimization; (7) reducing power plant effluent produces.
An important performance assessment criteria of power plant is a desulfuration efficiency now, requires to be not less than 90%.So wet desulphurization technology is efficiently adopted by increasing large power plant, the desulfurization water consumption also accounts for most of power plant's water consumption.The recovery of desulfurization water now mainly is to be undertaken by circulation in the desulfurizing tower, but through the steam in the flue gas after the wet desulphurization, the never measure of reclaiming.Flue gas after the desulfurization carries the steam more than 30%, does not discharge in the middle of the atmosphere if do not add to reclaim directly, will cause huge water resource waste.
Summary of the invention
The object of the present invention is to provide a kind of northern area that can be implemented in to adopt wet desulphurization, the moisture system and method for desulphurization system exhaust is reclaimed in the discharging of realization utmost point low water consumption, the lithium bromide circulation that desulfurization is efficient, operating cost is lower.
For achieving the above object, system of the present invention comprises desulfurizing tower and the chimney that is connected with the exhaust gases passes of boiler, in the gas approach of chimney, be furnished with surface exchanger, described surface exchanger is connected with lithium bromide refrigerator by pipeline and constitutes the closed loop, this surface exchanger is provided with the grooved passage of collecting condensate water, the inlet of described lithium bromide refrigerator is connected with the low pressure stage extraction opening of steam turbine by the road, the outlet of steam turbine and be connected with hot well by the road through the condensate water of lithium bromide refrigerator condensation.
Described flue gas is sent into desulfurizing tower through the condensed condensate water of surface exchanger by grooved passage and pipeline, and also is provided with the condensate water valve on this pipeline.
Also be provided with pressure-reducing valve on described steam turbine and the pipeline that lithium bromide refrigerator is connected.
The leaving water temperature that described and surface exchanger constitutes the lithium bromide refrigerator of closed-loop path is 6~20 ℃.
Method of the present invention is: 1) at first, the steam inlet of lithium bromide refrigerator is linked to each other with the low pressure stage extraction opening of steam turbine, the condensate water that steam forms behind lithium bromide refrigerator links to each other with hot well by the road;
2) secondly, in the gas approach of chimney, arrange and have the surface exchanger of collecting condensate water grooved passage, then surface exchanger being connected with lithium bromide refrigerator by pipeline constitutes the closed loop, and the cold water that lithium bromide refrigerator comes out is sent into surface exchanger and carried out heat exchange;
3) flue gas in the boiler enters desulfurizing tower through pipeline, enter the surface exchanger that is provided with in the chimney by the flue gas after the desulfurizing tower desulfurization, by surface exchanger flue gas is carried out condensation, condensed condensed water reclaims by heat exchanger grooved passage or directly sends into desulfurizing tower through pipeline.
The present invention can make full use of the power plant steam turbine low-pressure steam and bleed, and adopts the lithium bromide refrigerating principle to realize that the exhaust of refrigeration recovery desulphurization system is moisture.This is significant to the water saving of existing wet desulfurization system power plant, and can be implemented in northern area employing wet desulfurization system, realizes that utmost point low water consumption is discharged, desulfurization is efficient, operating cost is lower.Other water-saving methods of this programme and power plant are different, directly utilize the band water in the lithium bromide refrigerating principle recovery flue gas; Surface exchanger is increased in before the chimney in the flue, and cold working medium and flue gas carry out heat exchange in surface exchanger, and the water in the flue gas obtains through condensing reclaiming; This scheme is changed under the little prerequisite at equipment, can realize that high efficiency water resource reclaims.
Description of drawings
Fig. 1 is an overall structure schematic diagram of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
Referring to Fig. 1, the present invention includes the desulfurizing tower 2 and the chimney 4 that are connected with the exhaust gases passes of boiler 1, in the gas approach of chimney 4, be furnished with surface exchanger 3, described surface exchanger 3 is connected with lithium bromide refrigerator 5 by pipeline and constitutes the closed loop, the leaving water temperature of lithium bromide refrigerator 5 is 6~20 ℃, this cold water is sent into surface exchanger 3 and flue gas, and to carry out heat exchange condensation flue gas moisture, this surface exchanger 3 is provided with the grooved passage of collecting condensate water, flue gas is sent into desulfurizing tower 2 through surface exchanger 3 condensed condensate water by grooved passage and pipeline, and also is provided with condensate water valve 8 on this pipeline; The steam inlet of described lithium bromide refrigerator 5 is connected with the low pressure stage extraction opening of steam turbine 7 by the road, and on this pipeline, also be provided with pressure-reducing valve 9, utilize the extraction opening of steam turbine 7 that steam is extracted out, by pressure-reducing valve 9 steam of extracting out is reduced to lithium bromide refrigerator 5 required pressure and send into lithium bromide refrigerator 5; The outlet of steam turbine 7 and be connected with hot well 6 by the road through the condensate water of lithium bromide refrigerator 5 condensations.
Its process is:
1) at first, the steam inlet of lithium bromide refrigerator 5 is linked to each other with the low pressure stage extraction opening of steam turbine 7, the condensate water that steam forms behind lithium bromide refrigerator 5 links to each other with hot well 6 by the road;
2) secondly, in the gas approach of chimney 4, arrange and have the surface exchanger 3 of collecting condensate water grooved passage, then surface exchanger 3 is constituted the closed loop by pipeline and being connected of lithium bromide refrigerator 5, the cold water that lithium bromide refrigerator 5 comes out is sent into surface exchanger 3 and is carried out heat exchange;
3) flue gas in the boiler 1 carries out desulfurizing tower 2 through pipeline, enter the surface exchanger 3 that is provided with in the chimney 4 by the flue gas after desulfurizing tower 2 desulfurization, carry out condensation by 3 pairs of flue gases of surface exchanger, condensed condensed water reclaims by heat exchanger grooved passage or directly sends into desulfurizing tower 2 through pipeline.
Through the flue gas behind the wet desulfurization system, wherein moisture is bigger, so the recovery of moisture in the flue gas after desulfurization, and the shortage of alleviating the arid area water resource is had significance; The not electricity consumption of condensation flue gas with water, and with the low-pressure pumping steam of steam turbine, condensation efficiency height.
The present invention must not increase other extraction openings aspect extracted steam from turbine, existing extraction opening gets final product; In the native system, flue gas is a flue gas after desulfurization, can not cause corrosion to equipment;
Native system, steam 60%~80% in the recyclable flue gas.
Working medium in the surface heat exchanging organ pipe of the present invention is cold water, and pipe is outer to be flue gas.

Claims (5)

1. a lithium bromide circulates and reclaims the exhaust aqueous system of desulphurization system, comprise the desulfurizing tower (2) and the chimney (4) that are connected with the exhaust gases passes of boiler (1), it is characterized in that: in the gas approach of chimney (4), be furnished with surface exchanger (3), described surface exchanger (3) is connected with lithium bromide refrigerator (5) by pipeline and constitutes the closed loop, this surface exchanger (3) is provided with the grooved passage of collecting condensate water, the inlet of described lithium bromide refrigerator (5) is connected with the low pressure stage extraction opening of steam turbine (7) by the road, the outlet of steam turbine (7) and be connected with hot well (6) by the road through the condensate water of lithium bromide refrigerator (5) condensation.
2. the exhaust aqueous system of desulphurization system is reclaimed in lithium bromide circulation according to claim 1, it is characterized in that: described flue gas is sent into desulfurizing tower (2) through the condensed condensate water of surface exchanger (3) by grooved passage and pipeline, and also is provided with condensate water valve (8) on this pipeline.
3. the exhaust aqueous system of desulphurization system is reclaimed in lithium bromide according to claim 1 circulation, it is characterized in that: also be provided with pressure-reducing valve (9) on described steam turbine (7) and the pipeline that lithium bromide refrigerator (5) is connected.
4. the exhaust aqueous system of desulphurization system is reclaimed in lithium bromide circulation according to claim 1, it is characterized in that: the leaving water temperature that described and surface exchanger (3) constitutes the lithium bromide refrigerator (5) of closed-loop path is 6~20 ℃.
5. a lithium bromide circulates and reclaims the exhaust aqueous methods of desulphurization system, it is characterized in that:
1) at first, the steam inlet of lithium bromide refrigerator (5) is linked to each other with the low pressure stage extraction opening of steam turbine (7), the condensate water that steam forms behind lithium bromide refrigerator (5) links to each other with hot well (6) by the road;
2) secondly, in the gas approach of chimney (4), arrange and have the surface exchanger (3) of collecting condensate water grooved passage, then surface exchanger (3) being connected with lithium bromide refrigerator (5) by pipeline constitutes the closed loop, and the cold water that lithium bromide refrigerator (5) comes out is sent into surface exchanger (3) and carried out heat exchange;
3) flue gas in the boiler (1) enters desulfurizing tower (2) through pipeline, enter the surface exchanger (3) that is provided with in the chimney (4) by the flue gas after desulfurizing tower (2) desulfurization, by surface exchanger (3) flue gas is carried out condensation, condensed condensed water reclaims by heat exchanger grooved passage or directly sends into desulfurizing tower (2) through pipeline.
CN2010102239911A 2010-07-12 2010-07-12 Gas exhausting and water containing system and method for lithium bromide recycling desulfurization system CN101879379B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010102239911A CN101879379B (en) 2010-07-12 2010-07-12 Gas exhausting and water containing system and method for lithium bromide recycling desulfurization system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010102239911A CN101879379B (en) 2010-07-12 2010-07-12 Gas exhausting and water containing system and method for lithium bromide recycling desulfurization system

Publications (2)

Publication Number Publication Date
CN101879379A true CN101879379A (en) 2010-11-10
CN101879379B CN101879379B (en) 2012-05-23

Family

ID=43051593

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2010102239911A CN101879379B (en) 2010-07-12 2010-07-12 Gas exhausting and water containing system and method for lithium bromide recycling desulfurization system

Country Status (1)

Country Link
CN (1) CN101879379B (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102494349A (en) * 2011-12-16 2012-06-13 亿恒节能科技江苏有限公司 Blowing, dehumidifying and heating steam boiler system
CN102519068A (en) * 2011-12-02 2012-06-27 西安交通大学 Smoke water condensing and waste heat recovering device
CN103463832A (en) * 2013-10-09 2013-12-25 吉首大学 Tail gas refrigeration recycling processing device
CN103505901A (en) * 2013-09-28 2014-01-15 昆山市周市溴化锂溶液厂 Lithium bromide cycle collection based smoke exhaust and desulfurization system
CN103528044A (en) * 2013-09-28 2014-01-22 昆山市周市溴化锂溶液厂 Heat recovery system of smoke exhaust gas desulfurization device
CN103806964A (en) * 2012-11-06 2014-05-21 蓝瑚科技有限公司 Method and system for comprehensively utilizing steam turbine dead steam latent heat
CN105134316A (en) * 2015-08-19 2015-12-09 安徽新宁能源科技有限公司 Lithium bromide refrigeration and power generation system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06134255A (en) * 1992-10-22 1994-05-17 Mitsubishi Heavy Ind Ltd Wet treatment of flue gas
JPH0810552A (en) * 1994-06-27 1996-01-16 Chugoku Electric Power Co Inc:The Method for dehumidifying waste gas and dehumidifier
CN1327871A (en) * 2000-06-14 2001-12-26 王宇 Wet dusting and desulfurizing process
CN1408464A (en) * 2002-09-09 2003-04-09 华东理工大学 Removing and recovering process and device for SO2 in flue gas
CN1435271A (en) * 2003-02-27 2003-08-13 佛山市环境保护研究所 Flue gas treating method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06134255A (en) * 1992-10-22 1994-05-17 Mitsubishi Heavy Ind Ltd Wet treatment of flue gas
JPH0810552A (en) * 1994-06-27 1996-01-16 Chugoku Electric Power Co Inc:The Method for dehumidifying waste gas and dehumidifier
CN1327871A (en) * 2000-06-14 2001-12-26 王宇 Wet dusting and desulfurizing process
CN1408464A (en) * 2002-09-09 2003-04-09 华东理工大学 Removing and recovering process and device for SO2 in flue gas
CN1435271A (en) * 2003-02-27 2003-08-13 佛山市环境保护研究所 Flue gas treating method

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102519068B (en) * 2011-12-02 2015-08-05 西安交通大学 A kind of flue gas condensed water, waste-heat recovery device
CN102519068A (en) * 2011-12-02 2012-06-27 西安交通大学 Smoke water condensing and waste heat recovering device
CN102494349A (en) * 2011-12-16 2012-06-13 亿恒节能科技江苏有限公司 Blowing, dehumidifying and heating steam boiler system
CN103806964A (en) * 2012-11-06 2014-05-21 蓝瑚科技有限公司 Method and system for comprehensively utilizing steam turbine dead steam latent heat
CN103505901A (en) * 2013-09-28 2014-01-15 昆山市周市溴化锂溶液厂 Lithium bromide cycle collection based smoke exhaust and desulfurization system
CN103528044A (en) * 2013-09-28 2014-01-22 昆山市周市溴化锂溶液厂 Heat recovery system of smoke exhaust gas desulfurization device
CN103463832A (en) * 2013-10-09 2013-12-25 吉首大学 Tail gas refrigeration recycling processing device
CN105134316A (en) * 2015-08-19 2015-12-09 安徽新宁能源科技有限公司 Lithium bromide refrigeration and power generation system

Also Published As

Publication number Publication date
CN101879379B (en) 2012-05-23

Similar Documents

Publication Publication Date Title
CN101949612B (en) Cooling mode driven by utilizing urban heat supply network
CN101967999B (en) Combined heat and power generation energy saving device using afterheat to supply heat and energy saving method
CN201535176U (en) Mine cooling system
CN100400969C (en) Heating system of water source heat pump by using remaining heat of condensed steam from power plant
CN100507375C (en) Large temperature-difference central heating system
CN100501272C (en) System and method for transforming low temperature residual heat into steam
CN101858231B (en) Energy supply system mainly through gas and steam combined cycle cogeneration
CN201251371Y (en) Flue gas pre-cooling system with highly-effective water and energy conservation
CN106765448A (en) A kind of energy-saving heating system for reducing heat supply return water temperature
CN104533551B (en) The IGCC thermal power cogeneration central heating system of recovery waste heat and method
CN106705185A (en) Energy-saving heat supply system with function of reducing temperature of heat supply return water
Li et al. Technology application of district heating system with Co-generation based on absorption heat exchange
CN101392992B (en) Silicon smelting electric furnace waste heat power generation process flow and configuration
CN102678206B (en) Thermodynamic system for combined heat recovery of power plant
CN202007693U (en) Recovery device for low-temperature waste heat in power plant
CN101696643B (en) Low-temperature heat energy recovering apparatus of heat and electricity co-generation and recovering method thereof
CN101245400B (en) Recycling of coal gas of steel-smelting revolving furnace with dry method and sensible heat power generation system
CN102410665B (en) Waste heat recovery and utilization system for coal mine air compressor
CN202675910U (en) Waste heat recovery device for superconducting heat pipe of industrial kiln furnace
CN201568088U (en) Cogeneration system for directly recycling waste heat of exhaust steam from power station steam turbine with absorption type heat pump
CN201852360U (en) Heat pump system for recycling cooling water waste heat of power plant
CN204301356U (en) Sugar plant circulation cooling water system waste heat hydraulic recovery energy saver
CN101875992A (en) Device and method for removing dust from converter smoke by dry method and recycling waste heat
CN201475980U (en) Exhaust steam recovering and recycling system of deaeration tower
CN204254934U (en) A kind of heating system utilizing compression heat pump to realize the recovery of the residual heat from boiler fume degree of depth

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
EXPY Termination of patent right or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20120523

Termination date: 20150712