CN104973641B - A kind of method that flue gas low-temperature Waste Heat Reuse is combined with processing brine waste - Google Patents
A kind of method that flue gas low-temperature Waste Heat Reuse is combined with processing brine waste Download PDFInfo
- Publication number
- CN104973641B CN104973641B CN201410148048.7A CN201410148048A CN104973641B CN 104973641 B CN104973641 B CN 104973641B CN 201410148048 A CN201410148048 A CN 201410148048A CN 104973641 B CN104973641 B CN 104973641B
- Authority
- CN
- China
- Prior art keywords
- temperature
- heat
- low
- flue gas
- solution
- 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.)
- Active
Links
Classifications
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
Landscapes
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses the method that a kind of flue gas low-temperature Waste Heat Reuse of petrochemical industry is combined with processing brine waste, it is characterised in that comprises the steps of：1) absorbent solution circulation is completed；2) refrigerant cycle is completed；3) high-temperature flue gas recuperated cycle is completed；4) low-temperature flue gas recuperated cycle is completed；5) evaporate absorption heat exchange and low-temperature multi-effect to be closely linked, absorption heat exchange and low-temperature multi-effect evaporate two processes and be accomplished.By the way that the condenser of absorption heat-exchange and the 1st effective evaporator of low-temperature evaporation are united two into one, cryogenic heat wasting utilization is combined with processing brine waste, save heat medium water link, reduce heat transfer temperature difference and system loss, improve device economy, by the treatment of wastes with processes of wastes against one another, the dual purpose of energy-saving and emission-reduction has been reached.
Description
Technical field
The invention belongs to petrochemical industry, and in particular to a kind of processing method of Petrochemical Enterprises high-concentration salt-containing wastewater.
Background technology
Petroleum chemical enterprise can produce substantial amounts of waste water, mainly there is oily waste water, sulfur-containing waste water, brine waste and ammonia nitrogen in high density
Waste water.Wherein high slat-containing wastewater is one of intractable waste water, and organic high-salinity wastewater refers to contain organic matter and at least 3.5%
The waste water of (mass fraction) total dissolved solid thing, this brine waste often such as Ca of the soluble inorganic salt containing high concentration2+、
Na+、Cl+Etc. more than 3 times that salt content is seawater.
The main source of brine waste is：1) Atmospheric vacuum electro-desalting waste water；2) the high saliferous spent lye and benzene of ethylene unit
The high saline sewage of phenol acetone.Brine waste is big because of its fluctuation of concentration, and intractability is big.Current brine waste is usually to first pass through
Oxygen or anaerobic bio-treated, then using double films (micro-filtration+ultrafiltration) technology and counter-infiltration group technology.Sewage discharge end due to
Lack economic recycling method and will be arranged outside the high saline sewages of about 15-30%, on the one hand pollute environment, on the other hand
Water resource is not recycled.
By lasting energy-conservation in recent years, the furnace fuel gas of most of petroleum chemical enterprises desulfurizing and purifying takes sky
The mode of gas preheating, flue gas directly heats air, and heating furnace exhaust gas temperature has already decreased to 170-140 DEG C, the corresponding thermal efficiency
Bring up to more than 90%, Mist heat recovering.Due to also having substantial amounts of Low Temperature Thermal and vapor in 140 DEG C of flue gases, with energy-conservation
Work is carried out in a deep going way, passes through big different transfer of heat technology, it is desirable to be able to which flue-gas temperature is reduced into less than 50 DEG C, is not only able to reclaim
Sensible heat in flue gas, and can also in recovered flue gas vapor the heat of condensation, thermal efficiency of heating furnace can reach more than 98%, and
Obtain a large amount of Low Temperature Thermals.
If high-concentration salt-containing wastewater is concentrated by evaporation using the Low Temperature Thermal of petroleum chemical enterprise's heating furnace smoke evacuation, using low-temperature multi-effect
Evaporation technique, so as to get recycling condensing water, concentrate further crystallization form residual salt slag, it is possible to achieve high-concentration salt-containing wastewater
Zero-emission.This opens flue gas low-temperature UTILIZATION OF VESIDUAL HEAT IN new way, both recycles low temperature exhaust heat, and high saliferous has been handled again and has been given up
Water, condensed water can reach the dual purpose of energy-saving and emission-reduction with reuse, the treatment of wastes with processes of wastes against one another again.
Chinese patent 200910191207.0 discloses a kind of zero-discharge treatment process for industrial wastewater of iron and steel plant, it is proposed that first
Ion exchange resin treatment first is used to strong brine；Two-pass reverse osmosis film process is carried out again, makes strong brine at utmost decrement；Most
Afterwards using solidification or low-temperature multiple-effect evaporation crystallization processing, zero discharge of industrial waste water is realized.But this patent does not indicate multiple-effect evaporation
Specific method and thermal source.
Chinese patent 201010527671.5 discloses a kind of condenser type seawater desalting device with steam turbine generator unit, to send out
Generating and desalinization cost is greatly lowered as the thermal source of sea water desalinating unit in the weary steam of electric steam turbine discharge.This
The method of kind declines condenser vacuum, and generated energy is reduced, and generates electricity and desalinization interacts.
Chinese patent 201010174004.3 discloses a kind of reclaiming system for condensation heat of flue gas during pressurized oxy-coal combustion, utilizes
The characteristics of adiabatic condensation temperature of flue gas moisture brings up to 200 DEG C or so under high pressure, heats steam turbine condensate with condensation heat of flue gas, subtracts
Small flue gas loss, improves the heat-economy of pressurized oxy-fuel electricity generation system.The present invention can be only applied to high pressure flue gas system
System, is not suitable for most flue gas systems close to normal pressure.
Chinese patent 201210213293.2 discloses a kind of brine waste processing equipment, for existing evaporator highly energy-consuming
And the problem of adjoint air pollution, using solar energy as thermal source, to the processing of brine waste evaporative crystallization.Such a method climate influence
It is larger.
Chinese patent 201210573034.0 discloses a kind of incineration disposal method for high-salinity wastewater, by burning high saliferous
Flue gas waste heat recovery and processing are carried out after waste water makes fume emission up to standard.Such a method will expend a large amount of fuel.
The content of the invention
Petrochemical Enterprises flue gas of heating furnace low temperature exhaust heat is utilized it is an object of the invention to provide one kind, saliferous is concentrated by evaporation and gives up
Water, and the method for obtaining recycle-water, use low-temperature multi-effect evaporative condenser, the first of the condenser of absorption heat-exchange and low-temperature evaporation
Effect evaporator unites two into one, and is combined by cryogenic heat wasting utilization with processing brine waste, saves heat medium water link, reduce and change
The hot temperature difference and system loss, improve device economy, by the treatment of wastes with processes of wastes against one another, have reached the dual purpose of energy-saving and emission-reduction.
To achieve these goals, the technical solution adopted by the present invention is：
A kind of method that flue gas low-temperature Waste Heat Reuse is combined with processing brine waste, it is characterised in that include following step
Suddenly：
1) absorbent solution is heated to boiling in generator by the high-temperature-hot-water come from fume high-temperature heat exchanger, produces cold
Become absorbent concentrated solution after agent steam and enter absorber by decompression, absorb the refrigerant vapour produced in evaporator, release molten
Antipyretic, absorbent concentrated solution is diluted as after absorbent weak solution under the driving of solution pump entering generator, then is heated dense
Contracting completes absorbent solution circulation；
2) the part cryogen flowed out from low-temperature multi-effect evaporative condenser is absorbed heat by cryogen throttling arrangement into evaporator
Evaporation, the refrigerant vapor of generation is absorbed into absorber by absorbent solution, releases heat of solution；Part cryogen is entered by cryogenic fluid pump
Enter absorber and absorb heat of solution generation vaporization, import in the refrigerant vapour produced in generator；Part cryogen is entered by cryogenic fluid pump
Enter hot water heat exchanger to absorb after heat generation vaporization, import in the refrigerant vapour produced in generator, what is produced in generator is cold
Agent steam and the two strands of refrigerant vapours imported enter low-temperature multi-effect evaporative condenser together, are released and condense by brine waste condensation
Heat, completes refrigerant cycle；
3) hot water in fume high-temperature heat-exchange system is by fume high-temperature heat exchanger circulating pump, into high-temperature flue gas heat exchanger
Middle absorption fume high-temperature heat, is recycled to heating absorbent solution in generator as driving heat source and is allowed to be concentrated by evaporation, hot water
It is allowed to after outflow generator into hot water heat exchanger heating part cryogen after vaporization, returns fume high-temperature heat exchanger and complete high temperature
Flue gas heat exchange is circulated；
4) hot water in flue gas low-temperature heat-exchange system is by flue gas low-temperature heat exchanger circulating pump, into low-temperature flue gas heat exchanger
Middle absorption flue gas low-temperature heat quantity, is recycled to heating cryogen in evaporator as low-temperature heat source and is allowed to after vaporization, return cigarette
Gas cryogenic heat exchanger completes low-temperature flue gas recuperated cycle；
5) in low-temperature multi-effect evaporative condenser, brine waste absorbs the heat of condensation of refrigerant vapour, part brine waste
Evaporation, provides heat, unevaporated brine waste continues into 2nd effect evaporator to multiple-effect evaporations such as the second follow-up effects
Evaporation；The refrigerant vapour of absorption heat exchange is condensed in low-temperature multi-effect evaporative condenser by brine waste, in low-temperature multi-effect evaporation
In condenser, while completing the condensation of absorption heat exchange and the first effect evaporation of low-temperature evaporation.
In low-temperature multi-effect evaporative condenser, by the way that absorption heat exchange and low-temperature multi-effect evaporation are closely linked,
Cryogenic heat wasting utilization is combined with processing brine waste, is save heat medium water link, is reduced heat transfer temperature difference and system loss, is improved
Device economy.
The method that a kind of flue gas low-temperature Waste Heat Reuse of the present invention is combined with processing brine waste, it is characterised in that：It is described
Absorbent solution, refer to using absorbent as solute, cryogen be solvent constitute solution.The cryogen is in absorbent solution
Solvent.
The method that a kind of flue gas low-temperature Waste Heat Reuse of the present invention is combined with processing brine waste, it is characterised in that：It is described
In absorbent solution, solute can use lithium bromide, lithium nitrate or sodium sulfocyanate；Solvent can use water or ammonia；Constitute bromination
The aqueous solution of lithium, the ammonia solution of lithium nitrate, ammonia solution of sodium sulfocyanate etc. are used as absorbent solution.The absorbent solution is most normal
With the aqueous solution for being lithium bromide.
The method that a kind of flue gas low-temperature Waste Heat Reuse of the present invention is combined with processing brine waste, it is characterised in that：It is described
Fume waste heat is utilized is combined technique by above-mentioned five steps with processing brine waste, the heat of high temperature during heating furnace is discharged fume
Driving heat source is used as, the technology being combined using absorption heat exchange and low-temperature multi-effect evaporation is obtained flue gas low-temperature heat and condensed
Heat (is less than brine waste multiple-effect evaporation heat source temperature), provides thermal source for multiple-effect evaporation, realizes that flue gas low-temperature used heat makes full use of,
Used heat heat source temperature is set to be adapted to low-temperature evaporation brine waste technique.Flue gas of heating furnace temperature can be reduced to 50 DEG C, not only reclaim
The latent heat of water vapour, makes thermal efficiency of heating furnace reach more than 98% in the also partially recycled flue gas of the sensible heat of flue gas.With flue gas heat
Amount is directly used in multiple-effect evaporation and compared, and 70% flue gas heat can be reclaimed using the present invention more, useless for low-temperature evaporation saliferous
The need for water, brine waste zero emission is realized.
The present invention includes absorption heat exchange device and low-temperature multi-effect vaporising device depth combination, is steamed by low-temperature multi-effect
The condenser that feels cold realizes the function that the 1st effective evaporator for making the condenser of absorption heat exchange be evaporated with low-temperature multi-effect unites two into one, this
Sample is simplified heat exchange process, reduces heat transfer temperature difference, and the heat utilization efficiency of whole device is improved.The absorption heat exchange device
It is made up of solution circulation loop, refrigerant cycle loop and flue gas heat-exchange unit loop；Solution circulation loop by absorber, generator,
Solution heat exchanger, solution pump, solution decompression device are sequentially connected composition by pipeline；Evaporated by low-temperature multi-effect in refrigerant cycle loop
Condenser (1st effective evaporator evaporated with low-temperature multi-effect unites two into one), evaporator, cryogen throttling arrangement are connected by pipeline
Constitute；Flue gas heat-exchange unit loop is by flue gas low-temperature heat exchanger, flue gas low-temperature heat exchanger circulating pump, fume high-temperature heat exchanger, flue gas
High-temperature heat-exchanging circulating pump is connected and composed by pipeline.
Using the present invention, with following beneficial effect：The waste heat in flue gas is discharged using Petrochemical Enterprises heating furnace,
By flue-gas temperature cascade utilization mode, depth as much as possible, which reclaims heat, is used for the evaporation of this enterprise high-concentration salt-containing wastewater
Reuse, the treatment of wastes with processes of wastes against one another reaches energy-saving and emission-reduction dual purpose.Smoke evacuation high temperature position heat is separately considered with low temperature position heat,
The flue-gas temperature cascade utilization mode of integration is formed, i.e., by the use of high-grade fume afterheat as driving heat source, using absorption
Circulation, the low-grade condensation heat of recovery section from flue gas evaporates the thermal source of potential temperature in the middle of providing for brine waste, absorption is changed
The condenser of heat and the 1st effective evaporator of low-temperature evaporation unite two into one, and cryogenic heat wasting utilization is coupled with processing brine waste,
Heat transfer temperature difference and system heat loss are reduced, device economy is improved.The contained sensible heat of heating furnace smoke evacuation and latent heat are recycled,
Thermal efficiency of heating furnace is greatly improved, (more than 98% can be reached).Water vapour can absorb in condensation process in flue gas
A part of pernicious gas such as NOx、SOx, the discharge of pollutant is reduced, is conducive to environmental protection.The potential temperature that Waste Heat Recovery obtains heat is proper
The good thermal source needed with low-temperature multi-effect concentrating salt-containing waste water matches, and this just instead of System steam, make concentrating salt-containing waste water
Energy consumption substantially reduces (ordinary circumstance, heat energy cost accounts for the 80-90% of evaporation technology operating cost), realizes high-concentration salt-containing wastewater
Zero-emission.
A kind of flue gas low-temperature Waste Heat Reuse of the present invention is mainly used in refining oil, changed with handling the method that brine waste is combined
The energy-saving and emission-reduction in the fields such as work, Ferrous Metallurgy, Coal Chemical Industry, by efficiently utilizing the highly concentrated of fume waste heat processing production process generation
Brine waste is spent, enterprise is realized brine waste zero emission on the premise of energy consumption is not significantly increased.So as to realize energy-saving and emission-reduction
Dual purpose.If replacing fume waste heat with the low-temperature waste heat of enterprise's other forms, same purpose can be also realized using the present invention.
Other industry such as electric power, oil etc. can also realize used heat upgrading utilization using the present invention.
Brief description of the drawings
Accompanying drawing is the method flow schematic diagram that a kind of flue gas low-temperature Waste Heat Reuse of the invention is combined with processing brine waste；
Reference is shown in figure：1- absorbers；2- generators；3- evaporators；4- flue gas low-temperature heat exchangers；5- flue gases
High-temperature heat-exchanging；6- low-temperature multi-effect evaporative condensers；7- solution pumps；8- solution decompression valves；9- cryogen throttling arrangements；1O- evaporates
Device circulating pump；11- flue gas low-temperature heat exchanger circulating pumps；12- fume high-temperature heat exchanger circulating pumps；13- cryogenic fluid pumps；14- saliferous gives up
Water low-temperature multi-effect vapo(u)rization system；15- solution heat exchangers；16- hot water heat exchangers；170 DEG C of flue gases that 17- comes from heating furnace；18-50
DEG C discharge flue gas；19- the 2nd imitates evaporator；20- N imitate evaporator；21- multiple-effect evaporation condensation devices；22- cooling waters go out；23- is not
Solidifying gas；24- recycle-waters；25- brine wastes；26- cooling waters enter；27- enters the brine waste of low-temperature multi-effect evaporative condenser；
28- flows out the brine waste steam of low-temperature multi-effect evaporative condenser；29- flows out the brine waste of low-temperature multi-effect evaporative condenser.
Embodiment
The present invention is described in further detail with reference to specific implementation example, still, these embodiments are not to use
To limit the scope of the present invention in any way.
The technical scheme is that by the way of absorption heat exchange and low-temperature multi-effect evaporation degree are combined, it is absorption to change
The 1st effective evaporator that the condenser of heat evaporates with low-temperature multi-effect unites two into one, and is so simplified heat exchange process, reduces
Heat transfer temperature difference, improves the heat utilization efficiency of whole device.As shown in drawings, device is mainly by absorber 1 for device flow；Generator
2；Evaporator 3；Flue gas low-temperature heat exchanger 4；Fume high-temperature heat exchanger 5；Low-temperature multi-effect evaporative condenser 6；Solution pump 7；Solution subtracts
Pressure valve 8；Cryogen pressure-reducing valve 9；Evaporator circulating pump 10；Flue gas low-temperature heat exchanger circulates 11 pumps；Fume high-temperature heat exchanger circulating pump
12；Decompressor 13；Brine waste low-temperature multi-effect vapo(u)rization system 14；Solution heat exchanger 15；Hot water heat exchanger 16 and all kinds of connections
Pipeline and annex composition.
Absorbent weak solution is heated to boiling in generator 2 by the high-temperature-hot-water come from fume high-temperature heat exchanger, produces
Become concentrated solution after steam to depressurize after solution heat exchanger 15 into absorber 1, absorb the cryogen produced in evaporator 3 and steam
Vapour, releases heat of solution, and concentrated solution is diluted, and generator 2 is entered under the driving of solution pump 7, and heated concentration completion solution is followed again
Ring.The part cryogen flowed out from low-temperature multi-effect evaporative condenser 6 enters the heat absorption of evaporator 3 by cryogen throttling arrangement 9 and evaporated,
The refrigerant vapor of generation is absorbed into absorber 1 by absorbent solution, releases heat of solution；Another part cryogen passes through cryogenic fluid pump 13
Heat of solution is absorbed into absorber 1 and produces vaporization, is imported in the refrigerant vapour produced in generator 2；Another part cryogen passes through
Cryogenic fluid pump 12 enters hot water heat exchanger 16 and absorbed after heat generation vaporization, imports in the refrigerant vapour produced in generator 2, occurs
The refrigerant vapour produced in device 2 and the two strands of refrigerant vapours imported enter low-temperature multi-effect evaporative condenser 6 together, by brine waste
The heat of condensation is released in condensation, completes refrigerant cycle.Hot water in fume high-temperature heat-exchange system passes through fume high-temperature heat exchanger circulating pump
12, fume high-temperature heat is absorbed into high-temperature flue gas heat exchanger 5, is recycled to as driving heat source in generator 2 and heats absorption
Agent solution is allowed to be concentrated by evaporation, and hot water stream goes out after generator 2 to be allowed to after vaporization into the heating part cryogen of hot water heat exchanger 16, then
Return to fume high-temperature heat exchanger 5 and complete high-temperature flue gas recuperated cycle.Hot water in flue gas low-temperature heat-exchange system passes through flue gas low-temperature
Heat exchanger circulating pump 11, absorbs flue gas low-temperature heat quantity into low-temperature flue gas heat exchanger 4, evaporator is recycled to as low-temperature heat source
Cryogen is heated in 3 to be allowed to after vaporization, is returned flue gas low-temperature heat exchanger 4 and is completed low-temperature flue gas recuperated cycle.It is used as saliferous
The 1st effective evaporator of waste water multi-effect evaporation system 14, low-temperature multi-effect evaporative condenser 6 absorbs the heat of condensation of refrigerant vapour, gives
Follow-up multiple-effect evaporation provides heat.By absorption heat exchange and low-temperature multi-effect evaporation be coupled, whole device realize with
Flue gas high temperature heat is as driving heat source, and the Low Temperature Thermal and the heat of condensation obtained in flue gas (is less than brine waste multiple-effect evaporation thermal source
Temperature), heat is provided for multiple-effect evaporation, the used heat in flue gas is fully used.
Below according to the flow and canonical parameter of the present invention, the embodiment to the present invention is illustrated.
The embodiment of the present invention.
As shown in drawings, absorbent weak solution and refrigerant cycle are identical with above-mentioned principle.Absorbent weak solution is in generator 2
In be heated to boiling with 160 DEG C of high-temperature-hot-water countercurrent flows, produce and become concentrated solution after 120 DEG C of steam and by decompression enter to inhale
Device 1 is received, the 43 DEG C of refrigerant vapours produced in evaporator 3 are absorbed, heat of solution is released.Solution boiling is produced in generator 2 120 DEG C
Refrigerant vapour enters in low-temperature multi-effect evaporative condenser 6 to be condensed after concentrating salt-containing waste water, releases the heat of condensation, cold as 70 DEG C of liquid
Agent.A part of 70 DEG C of liquid refrigerants enter the heat absorption of evaporator 3 by throttling arrangement 9 and evaporated, and 43 DEG C of refrigerant vapors of generation, which enter, inhales
Device 1 is received to be absorbed by absorbent solution；70 DEG C of liquid refrigerants of another part enter absorber 1 by cryogenic fluid pump 13 and absorb heat of solution production
Raw 70 DEG C of refrigerant vapours, are imported in the 120 DEG C of refrigerant vapours produced in generator 2；Another 70 DEG C of part liquid refrigerant passes through cold
Agent pump 13 enters hot water heat exchanger 16 and produces 70 DEG C of steam, imports in the 120 DEG C of refrigerant vapours produced in generator 2.Evaporation is cold
The 115 DEG C of hot water come out after agent from generator 2 into hot water heat exchanger 16 are changed into 75 DEG C of hot water, are followed by fume high-temperature heat exchanger
Ring pump 12, exchanges heat to 160 DEG C with 170 DEG C of flue gas adverse currents into high-temperature flue gas heat exchanger 5, generation is recycled to as driving heat source
Heated solution is allowed to be concentrated by evaporation in device 2.45 DEG C of hot water after evaporation water as refrigerant from evaporator 3 out are changed by flue gas low-temperature
Hot device circulating pump 11, exchanges heat to 70 DEG C into low-temperature flue gas heat exchanger 4 and flue gas adverse current, evaporator is recycled to as low-temperature heat source
Cryogen is heated in 3 to be allowed to be vaporizated into 43 DEG C of steam.It is coupled by absorption heat exchange and low-temperature multi-effect evaporation, whole device is realized
Using 170-75 DEG C of flue gas as driving heat source, 75-50 DEG C of Low Temperature Thermal and the heat of condensation in flue gas are obtained (many less than brine waste
70 DEG C of heat source temperatures of effect evaporation), 70 DEG C of thermals source are provided for multiple-effect evaporation, 170-50 DEG C of used heat in flue gas is obtained abundant profit
With.As the 1st effective evaporator of brine waste multi-effect evaporation system 14, low-temperature multi-effect evaporative condenser 6 absorbs 70 DEG C of cryogens
The heat of condensation of steam, heat is provided to follow-up multiple-effect evaporation, is completed the crystallization of brine waste multiple-effect evaporation, is realized brine waste
Zero-emission.
Claims (3)
1. a kind of method that flue gas low-temperature Waste Heat Reuse is combined with processing brine waste, it is characterised in that comprise the steps of：
1) absorbent solution is heated to boiling in generator by the high-temperature-hot-water come from fume high-temperature heat exchanger, produces cryogen and steams
Become absorbent concentrated solution after vapour and enter absorber by decompression, absorb the refrigerant vapour produced in evaporator, release heat of solution,
Absorbent concentrated solution is diluted as after absorbent weak solution under the driving of solution pump entering generator, then is heated concentration completion
Absorbent solution is circulated；Described absorbent solution, refers to using absorbent as solute, and cryogen is the solution that solvent is constituted；It is described
Cryogen is the solvent in absorbent solution；
2) the part cryogen flowed out from low-temperature multi-effect evaporative condenser enters evaporator heat absorption by cryogen throttling arrangement and evaporated,
The refrigerant vapor of generation is absorbed into absorber by absorbent solution, releases heat of solution；Part cryogen is entered by cryogenic fluid pump to be inhaled
Receive device and absorb heat of solution generation vaporization, import in the refrigerant vapour produced in generator；Part cryogen enters heat by cryogenic fluid pump
Water- to-water heat exchanger absorbs heat and produced after vaporization, imports in the refrigerant vapour produced in generator, and the cryogen produced in generator steams
Vapour and the two strands of refrigerant vapours imported enter low-temperature multi-effect evaporative condenser together, and the heat of condensation is released by brine waste condensation, complete
Into refrigerant cycle；
3) hot water in fume high-temperature heat-exchange system is inhaled by fume high-temperature heat exchanger circulating pump into fume high-temperature heat exchanger
Fume high-temperature heat is received, heating absorbent solution in generator is recycled to as driving heat source and is allowed to be concentrated by evaporation, hot water outflow
It is allowed to after generator into hot water heat exchanger heating part cryogen after vaporization, returns fume high-temperature heat exchanger and complete high-temperature flue gas
Recuperated cycle；
4) hot water in flue gas low-temperature heat-exchange system is inhaled by flue gas low-temperature heat exchanger circulating pump into flue gas low-temperature heat exchanger
Flue gas low-temperature heat quantity is received, being recycled to heating cryogen in evaporator as low-temperature heat source is allowed to after vaporization, returns flue gas low
Warm heat exchanger completes low-temperature flue gas recuperated cycle；
5) in low-temperature multi-effect evaporative condenser, brine waste absorbs the heat of condensation of refrigerant vapour, and part brine waste evaporates,
Heat is provided to follow-up each multiple-effect evaporation, unevaporated brine waste, which enters 2nd effect evaporator, to be continued to evaporate；It is absorption
The refrigerant vapour of heat exchange is condensed in low-temperature multi-effect evaporative condenser by brine waste, in low-temperature multi-effect evaporative condenser, together
When complete absorption heat exchange condensation and low-temperature evaporation first effect evaporation.
2. the method that flue gas low-temperature Waste Heat Reuse according to claim 1 is combined with processing brine waste, its feature exists
In：In the absorbent solution, solute is lithium bromide, lithium nitrate or sodium sulfocyanate；Solvent is water or ammonia.
3. the method that flue gas low-temperature Waste Heat Reuse according to claim 1 is combined with processing brine waste, its feature exists
In：The absorbent solution is the aqueous solution of lithium bromide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410148048.7A CN104973641B (en) | 2014-04-08 | 2014-04-08 | A kind of method that flue gas low-temperature Waste Heat Reuse is combined with processing brine waste |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410148048.7A CN104973641B (en) | 2014-04-08 | 2014-04-08 | A kind of method that flue gas low-temperature Waste Heat Reuse is combined with processing brine waste |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104973641A CN104973641A (en) | 2015-10-14 |
| CN104973641B true CN104973641B (en) | 2017-07-14 |
Family
ID=54270673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410148048.7A Active CN104973641B (en) | 2014-04-08 | 2014-04-08 | A kind of method that flue gas low-temperature Waste Heat Reuse is combined with processing brine waste |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104973641B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106669208B (en) * | 2016-12-21 | 2019-01-18 | 山东大学 | A kind of system and technique for strengthening brine waste concentration using low-temperature flue gas |
| CN106587235A (en) * | 2017-02-09 | 2017-04-26 | 北京哈宜节能环保科技开发有限公司 | Full-load gradient flue gas waste heat evaporative waste water control system and control method thereof |
| CN108609786B (en) * | 2018-02-22 | 2024-01-05 | 华北水利水电大学 | Evaporation condensation circulation equipment and method for driving brine separation and full recovery of high-salt wastewater by low-quality waste heat |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09103766A (en) * | 1995-10-13 | 1997-04-22 | Mitsubishi Heavy Ind Ltd | Seawater desalting device |
| JP2002239534A (en) * | 2001-02-19 | 2002-08-27 | Ebara Corp | Vacuum evaporation type desalting apparatus |
| CN101462780A (en) * | 2009-01-23 | 2009-06-24 | 国家海洋局天津海水淡化与综合利用研究所 | Low temperature multiple-effect distillation seawater desalination system and process flow thereof |
| CN201485353U (en) * | 2008-11-21 | 2010-05-26 | 中国神华能源股份有限公司 | Low-temperature multi-effect seawater desalting device |
-
2014
- 2014-04-08 CN CN201410148048.7A patent/CN104973641B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09103766A (en) * | 1995-10-13 | 1997-04-22 | Mitsubishi Heavy Ind Ltd | Seawater desalting device |
| JP2002239534A (en) * | 2001-02-19 | 2002-08-27 | Ebara Corp | Vacuum evaporation type desalting apparatus |
| CN201485353U (en) * | 2008-11-21 | 2010-05-26 | 中国神华能源股份有限公司 | Low-temperature multi-effect seawater desalting device |
| CN101462780A (en) * | 2009-01-23 | 2009-06-24 | 国家海洋局天津海水淡化与综合利用研究所 | Low temperature multiple-effect distillation seawater desalination system and process flow thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104973641A (en) | 2015-10-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105923676B (en) | High-efficiency solar sea water desalination and air conditioner refrigerating cooperation method and system | |
| US4209364A (en) | Process of water recovery and removal | |
| CN104973642B (en) | A kind of method that utilization flue gas low-temperature used heat handles brine waste | |
| US8978397B2 (en) | Absorption heat pump employing a high/low pressure evaporator/absorber unit a heat recovery unit | |
| US5346592A (en) | Combined water purification and power of generating plant | |
| WO2006094437A1 (en) | A method and an multi-effect evaporation for waste water of alkylene oxides | |
| CN103806964A (en) | Method and system for comprehensively utilizing steam turbine dead steam latent heat | |
| CN101204641A (en) | Treating system for film evaporating concentrated liquid and method therefor | |
| US8839635B2 (en) | High efficiency double-effect chiller heater apparatus | |
| CN104973641B (en) | A kind of method that flue gas low-temperature Waste Heat Reuse is combined with processing brine waste | |
| CN109095535B (en) | Sewage evaporation concentration device and operation method thereof | |
| CN109319866A (en) | A kind of sea water desalination and the concentration integrated system of concentrated seawater and processing method | |
| CN103496750A (en) | System for concentrating salt-containing wastewater and recycling fresh water by comprehensive utilization of heat pump system | |
| CN110451596A (en) | A kind of carrier gas extraction HPE vapo(u)rization system | |
| CN108128831A (en) | Solar heat pump desalination plant | |
| CN106587238A (en) | Sea water desalination system and method with low temperature exhaust heat utilization function | |
| CN201161936Y (en) | System for desalinating sea water | |
| CN207266809U (en) | Highly concentrated organic exhaust gas rectifying concentrates-burn joint processing system | |
| CN207451832U (en) | A kind of high organic wastewater hotting mask coupling zero-discharge treatment system with high salt | |
| CN205316748U (en) | Compound heat pump hydrothermal coproduction device | |
| CN216584272U (en) | Primary evaporation negative pressure desalting device for desalting high-salinity wastewater | |
| CN103420439B (en) | Realize the treatment process of Leachate site zero release of pollutant and resource utilization | |
| CN109578973A (en) | Oxygen-eliminating device system and working method | |
| CN101734743A (en) | Method for circulating industrial cooling water and producing demineralized water | |
| CN111517400B (en) | Low-grade heat source coupling multi-effect flash evaporation concentration evaporation system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |