CN107166367A - A kind of fume afterheat and moisture recovery system based on ceramic membrane heat exchanger - Google Patents
A kind of fume afterheat and moisture recovery system based on ceramic membrane heat exchanger Download PDFInfo
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- CN107166367A CN107166367A CN201710474560.4A CN201710474560A CN107166367A CN 107166367 A CN107166367 A CN 107166367A CN 201710474560 A CN201710474560 A CN 201710474560A CN 107166367 A CN107166367 A CN 107166367A
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- ceramic membrane
- heat exchanger
- flue gas
- low temp
- membrane heat
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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
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/003—Feed-water heater systems
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Supply (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
A kind of fume afterheat and moisture recovery system based on ceramic membrane heat exchanger, metal low temp economizer is combined with ceramic membrane heat exchanger and is applied in the waste heat of coal-fired flue-gas and moisture recycling.Metal low temp economizer reclaims obvious heat of smoke after air-introduced machine, reduces flue-gas temperature, improves smoke desulfurization efficiency.Ceramic membrane heat exchanger recovered flue gas sensible heat after desulfurization can be reduced with the steam vapour amount in vapor, recovered flue gas in latent heat and flue gas even substitutes unit moisturizing completely.The alternative machine assembly air-exhausting of heat that system is reclaimed, to increase steam turbine acting generating.The system is improved with having great potential in the reduction of coal consumption water consume in the efficiency of coal unit.
Description
Technical field
The present invention relates to coal-burning power plant's field of energy-saving technology, and in particular to a kind of fume afterheat based on ceramic membrane heat exchanger
And moisture recovery system.
Background technology
The area that China's fired power generating unit is concentrated, freshwater resources are relatively deficient.By in by the end of May, 2017,6000 kilowatts of the whole nation
And 16.2 hundred million kilowatts of above power plant unit capacity, wherein, 10.6 hundred million kilowatts of thermoelectricity accounts for the 65.4% of installation total capacity, according to statistics,
About more than 41% fired power generating unit is influenceed by shortage of water resources.But, the water for having 10% or so in power plant emission flue gas steams
Gas is discharged into air, by taking a 300MW coal unit as an example, and the water content in flue gas is discharged per hour just up to 150 tons or so, if its
In 20% vapor be captured utilization, then the unit can substantially realize that moisturizing is self-sustaining.
At present at home, metal tube and fluorine plastic tube low-level (stack-gas) economizer have obtained substantial amounts of research and application, but are due to
The external condensation of vapor can occur in the relatively low flue of cigarette temperature for these heat exchangers, condense water quality inferiority and meeting heat exchanging device is carried out
A certain degree of corrosion, heat exchanging device and flue have certain infringement.Although fume afterheat can obtain a certain degree of recovery
Using but can't effectively solve the waste of water resource and its latent heat and subsidiary boiler flue corrosion, environmental pollution etc. in flue gas
Problem.Although metal tube and the existing different waste heat recovery scheme of fluorine plastic tube low-level (stack-gas) economizer are applied in coal unit,
Such as series and parallel is in unit heat regenerative system, to substitute part pumping so as to improve unit efficiency.But these schemes still could not
The problem of avoiding low-temperature corrosion completely, and unit moisturizing water consumption can not be solved.
The present invention devises a kind of fume afterheat and moisture recovery scheme based on ceramic membrane heat exchanger.
The content of the invention
In order to which depth reclaims the waste heat and vapor in coal-burning boiler smoke evacuation, be thermal power plant save water and energy open up one it is brand-new
Approach, the present invention provides a kind of fume afterheat and moisture recovery system based on ceramic membrane heat exchanger, and the device is current coal-fired
It is a brand-new exploration that power plant, which is relied primarily in the environment of metal low temp heat exchanger Mist heat recovering,.
A kind of fume afterheat and moisture recovery system based on ceramic membrane heat exchanger, it is characterised in that：The system includes gold
Belong to low-level (stack-gas) economizer, ceramic membrane heat exchanger, plumbing connection system and valve；Ceramic membrane heat exchanger is main by hollow micro-nano ceramics
Film is constituted, both sides be flange-interface can multiple heat exchangers be connected in flue and use, can also used aloned, usage quantity it is many
Exhaust gas volumn and flue-gas temperature height are depended primarily on less；Metal low temp economizer is placed on after air-introduced machine, wet flue gas desulfurization
Before device, it is ensured that temperature is reduced in the range of the best flue-gas temperature of desulfuration efficiency before flue gas enters desulfurizing tower；Gold
The current of category low-level (stack-gas) economizer are connected between No. 6 heaters of unit and No. 7 heaters；Ceramic membrane heat exchanger is placed on wet type cigarette
After desulfurization device, after desulfurization enter ceramic membrane heat exchanger in flue gas containing very low amounts oxysulfide even without,
It can so ensure that the moisture quality that ceramic membrane heat exchanger is reclaimed is high；Flue gas is after wet type desulfurizing, vapor base in flue gas
This is in saturation state, and water vapour content increase can so ensure that recovery amount of moisture is big；Current are connected on unit condenser with coagulating
Bear water between pump, the condensate that condenser comes out is substantially under several kPas of pressure, this part water is changed into ceramic membrane
Subnormal ambient in the pipe required for ceramic membrane heat exchanger can be ensured in hot device, can so make system avoid introducing outside power consumption
Equipment, directly by existing device in unit, power consumption can also be reduced while guarantee system is succinct.
A kind of operation workflow of fume afterheat and moisture recovery system based on ceramic membrane heat exchanger：
Flue gas is drawn after flowing through air preheater, deduster successively through air-introduced machine, and flue gas is carried out into metal low temp economizer
Heat release；The condensate now come out from No. 7 heaters absorbs obvious heat of smoke in metal low temp economizer and realizes heating and continue
Into No. 6 heaters；Its temperature is reduced to after optimal desulfurization temperature in metal low temp economizer, flue gas is changed into ceramic membrane
Sensible heat and latent heat treatment are carried out in hot device, now condensate flows into and keeps negative pressure state, and vapor is due to by flue gas
The capillary condensation effect of empty micro-nano ceramic membrane can be penetrated into condensing the suction function of current through hollow micro-nano ceramic membrane
Converge in pipe with current；This part can enter No. 8 heaters by the condensate that flue gas shows Topography through condensate pump.Last water
It is recycled.
Beneficial effects of the present invention are：
The present invention is used in certain 600MW unit, and generating standard coal consumption decreasing value can be made to reach 2.005 g/ (kW h), recycle-water
Amount can substitute under unit this operating mode 3% make-up water percentage completely.Save costly up to nearly ten million yuan year.
Brief description of the drawings
Fig. 1 is fume afterheat and moisture recovery system scheme schematic diagram.
Fig. 2 is ceramic membrane heat exchanger structure schematic diagram.
Number explanation：1 is No. 6 low-temperature heaters, and 2 be No. 7 low-temperature heaters, and 3 be No. 8 low-temperature heaters, and 4 be condensate
Pump, 5 be condenser, and 6 be air preheater, and 7 be deduster, and 8 be air-introduced machine, and 9 be metal low temp economizer, and 10 be Wet smoke
Desulfurizer, 11 be ceramic membrane heat exchanger, and 12,13,14,15,16,17 be valve, and 18 be hollow micro-nano ceramic membrane.
Embodiment
The invention provides a kind of fume afterheat based on ceramic membrane heat exchanger and moisture recovery system, below in conjunction with the accompanying drawings
The present invention will be further described with embodiment.
A kind of fume afterheat and moisture recovery system based on ceramic membrane heat exchanger, it is characterised in that：
The system includes metal low temp economizer（9）, ceramic membrane heat exchanger（11）, plumbing connection system and valve；Ceramic membrane is changed
Hot device（11）Mainly by hollow micro-nano ceramic membrane（18）Composition, both sides be flange-interface can multiple heat exchangers be connected in flue
Use, can also used aloned；Metal low temp economizer（9）It is placed on air-introduced machine（8）Afterwards, wet type fume sweetening device（10）
Before, it is ensured that temperature is reduced in the range of the best flue-gas temperature of desulfuration efficiency before flue gas enters desulfurizing tower；Metal is low
Warm economizer（9）Current be connected on No. 6 heaters of unit（1）With No. 7 heaters（2）Between；Ceramic membrane heat exchanger（11）Put
Put in wet type fume sweetening device（10）Afterwards, it is ensured that ceramic membrane heat exchanger（11）The moisture quality of recovery is high；Current string
It is associated in unit condenser（5）With condensate pump（4）Between, condenser（5）Condensate out is substantially at several kPas of pressure
Under power, this part water enters ceramic membrane heat exchanger（11）In can ensure ceramic membrane heat exchanger（11）Negative pressure in required pipe
Environment.
A kind of fume afterheat and moisture recovery system based on ceramic membrane heat exchanger, the operation workflow of the system are as follows：
Flue gas flows through air preheater successively（6）, deduster（7）By air-introduced machine（8）Draw, into metal low temp economizer
（9）Middle progress flue gas heat release；Close valve（12）, open valve（14）With valve（13）, from No. 7 heaters（2）Out solidifying
Bear water in metal low temp economizer（9）Middle absorption obvious heat of smoke, which is realized, heats up and goes successively to No. 6 heaters（1）；It is low in metal
Warm economizer（9）Middle that its temperature is reduced to after optimal desulfurization temperature, flue gas enters ceramic membrane heat exchanger（11）Middle carry out sensible heat
With latent heat treatment；Close valve（15）, open valve（16）With valve（17）, now condensate inflow ceramic membrane heat exchanger（11）
In and keep in negative pressure state, flue gas vapor due to by hollow micro-nano ceramic membrane（18）Capillary condensation effect with condense
The suction function of current can be through hollow micro-nano ceramic membrane（18）Penetrate into and converge in pipe with current；This part is aobvious latent by flue gas
The condensate of heat heating can be through condensate pump（4）Into No. 8 heaters（3）.Last water is recycled.
Claims (2)
1. a kind of fume afterheat and moisture recovery system based on ceramic membrane heat exchanger, it is characterised in that
The system includes metal low temp economizer（9）, ceramic membrane heat exchanger（11）, plumbing connection system and valve；Ceramic membrane is changed
Hot device（11）Mainly by hollow micro-nano ceramic membrane（18）Composition, metal low temp economizer（9）It is placed on air-introduced machine（8）Afterwards,
Wet type fume sweetening device（10）Before；Metal low temp economizer（9）Current be connected on No. 6 heaters of unit（1）Add with No. 7
Hot device（2）Between；Ceramic membrane heat exchanger（11）It is placed on wet type fume sweetening device（10）Afterwards；Current are connected on unit condensing
Device（5）With condensate pump（4）Between, condenser（5）Condensate out is substantially under several kPas of pressure, this part
Water enters ceramic membrane heat exchanger（11）In can ensure ceramic membrane heat exchanger（11）Subnormal ambient in required pipe.
2. a kind of fume afterheat and moisture recovery system based on ceramic membrane heat exchanger according to claim 1, it is special
Levy and be, the operation workflow of system is as follows：Flue gas flows through air preheater successively（6）, deduster（7）By air-introduced machine（8）Draw
Go out, into metal low temp economizer（9）Middle progress flue gas heat release；Close valve（12）, open valve（14）With valve（13）, from
No. 7 heaters（2）Condensate out is in metal low temp economizer（9）Middle absorption obvious heat of smoke, which is realized, heats up and goes successively to 6
Number heater（1）；In metal low temp economizer（9）Middle that its temperature is reduced to after optimal desulfurization temperature, flue gas enters ceramic membrane
Heat exchanger（11）Middle progress sensible heat and latent heat treatment；Close valve（15）, open valve（16）With valve（17）, now condensate
Flow into ceramic membrane heat exchanger（11）In and keep in negative pressure state, flue gas vapor due to by hollow micro-nano ceramic membrane（18）
Capillary condensation effect with condense current suction function can be through hollow micro-nano ceramic membrane（18）Penetrate into pipe and current
Converge；The condensate that this part shows Topography by flue gas can be through condensate pump（4）Into No. 8 heaters（3）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710474560.4A CN107166367A (en) | 2017-06-21 | 2017-06-21 | A kind of fume afterheat and moisture recovery system based on ceramic membrane heat exchanger |
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| CN201710474560.4A CN107166367A (en) | 2017-06-21 | 2017-06-21 | A kind of fume afterheat and moisture recovery system based on ceramic membrane heat exchanger |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109812828A (en) * | 2019-02-19 | 2019-05-28 | 东莞理工学院 | A kind of moisture and waste heat recycling system based on the wet recyclable device of ceramic membrane heat |
| CN110465163A (en) * | 2019-08-21 | 2019-11-19 | 华北电力大学 | A kind of flue gas water capturing installation and ceramic membrane cleaning process based on ceramic membrane |
| CN112902699A (en) * | 2021-03-26 | 2021-06-04 | 华北电力大学 | Cooling tower water vapor recovery system of thermal power plant |
| CN113339830A (en) * | 2021-03-25 | 2021-09-03 | 华北电力大学 | Coal-fired unit flue gas moisture and waste heat recovery utilize system based on pottery embrane method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08155262A (en) * | 1994-12-07 | 1996-06-18 | Babcock Hitachi Kk | Water-or carbon dioxide-recovering-type wet desulfurization and apparatus therefor |
| CN202203971U (en) * | 2011-07-28 | 2012-04-25 | 中国电力工程顾问集团西南电力设计院 | Discharged smoke afterheat recycling and emission reduction comprehensive application system for coal-fired boiler in thermal power plant |
| CN203147789U (en) * | 2013-04-10 | 2013-08-21 | 袁世岭 | Flue gas processing system used in thermal power plant |
| CN105299676A (en) * | 2015-09-16 | 2016-02-03 | 华北电力大学 | Smoke moisture and waste heat recovery device based on hollow micro-nano porous ceramic membranes |
-
2017
- 2017-06-21 CN CN201710474560.4A patent/CN107166367A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08155262A (en) * | 1994-12-07 | 1996-06-18 | Babcock Hitachi Kk | Water-or carbon dioxide-recovering-type wet desulfurization and apparatus therefor |
| CN202203971U (en) * | 2011-07-28 | 2012-04-25 | 中国电力工程顾问集团西南电力设计院 | Discharged smoke afterheat recycling and emission reduction comprehensive application system for coal-fired boiler in thermal power plant |
| CN203147789U (en) * | 2013-04-10 | 2013-08-21 | 袁世岭 | Flue gas processing system used in thermal power plant |
| CN105299676A (en) * | 2015-09-16 | 2016-02-03 | 华北电力大学 | Smoke moisture and waste heat recovery device based on hollow micro-nano porous ceramic membranes |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109812828A (en) * | 2019-02-19 | 2019-05-28 | 东莞理工学院 | A kind of moisture and waste heat recycling system based on the wet recyclable device of ceramic membrane heat |
| CN110465163A (en) * | 2019-08-21 | 2019-11-19 | 华北电力大学 | A kind of flue gas water capturing installation and ceramic membrane cleaning process based on ceramic membrane |
| CN110465163B (en) * | 2019-08-21 | 2023-12-22 | 华北电力大学 | Ceramic membrane-based flue gas water capturing device and ceramic membrane cleaning process |
| CN113339830A (en) * | 2021-03-25 | 2021-09-03 | 华北电力大学 | Coal-fired unit flue gas moisture and waste heat recovery utilize system based on pottery embrane method |
| CN112902699A (en) * | 2021-03-26 | 2021-06-04 | 华北电力大学 | Cooling tower water vapor recovery system of thermal power plant |
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