CN108413427A - Coal-burning power plant's waste-heat recovery device - Google Patents
Coal-burning power plant's waste-heat recovery device Download PDFInfo
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- CN108413427A CN108413427A CN201810182250.XA CN201810182250A CN108413427A CN 108413427 A CN108413427 A CN 108413427A CN 201810182250 A CN201810182250 A CN 201810182250A CN 108413427 A CN108413427 A CN 108413427A
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- Prior art keywords
- chamber
- waste
- coal
- heat recovery
- power plant
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- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/266—Drying gases or vapours by filtration
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/08—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being otherwise bent, e.g. in a serpentine or zig-zag
- F28D7/082—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being otherwise bent, e.g. in a serpentine or zig-zag with serpentine or zig-zag configuration
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a kind of coal-burning power plant's waste-heat recovery devices, include first chamber, second chamber and heat exchanger, the side of first chamber is provided with the inlet duct to enter to the damp and hot flue gas after desulfurization, first chamber is provided with the connecting pipe of connection second chamber in the other side opposite with inlet duct, and dehumidification solution is loaded in first chamber；The coil pipe of heat exchanger is set in second chamber, and second chamber offers the outlet conduit to go out to flue gas.The present invention is gathered two kinds of waste heat recoveries using comprehensive waste heat recovery mode, to reach good effect, increases efficiency；And two ways is independent of each other, and can targetedly select two and work or only use together one of work, flexibility is very high, has broken away from conventional method only with a kind of mode come the limitation of recovery waste heat.
Description
Technical field
The present invention relates to flue gas of power plants processing technology field more particularly to a kind of coal-burning power plant's waste-heat recovery devices.
Background technology
In China, most coal-burning power plants use wet desulfurizing process, and large quantity of moisture evaporates in sweetening process, in flue gas
Vapor volume fraction increases, and therefore, the water vapour and waste heat of the discharge of boiler system tail portion are coal-burning power plant's water resource and energy
The important component of consumption.Most of obvious heat of smoke is converted to vapor latent heat, i.e. flue gas after desulfurization heat is mainly steamed with water
The form of gas latent heat exists.Therefore, in the prior art, the major way of waste heat recovery of the most of power plant after wet desulphurization
That the recovery of latent heat of vapor recycles, specific method includes mainly condensation method, absorption process and embrane method etc., but often in use all
It is relatively simple so that inefficient.And in some specific modes, structure design is not perfect, and could not be properly arrived at
Ideal organic efficiency has prodigious room for improvement.
Invention content
For the above deficiency, the present invention provides a kind of coal-burning power plant's waste-heat recovery device, passes through comprehensive waste heat recovery side
Formula can improve organic efficiency, reduce energy loss.
In order to achieve the above objectives, the present invention adopts the following technical scheme that：
A kind of coal-burning power plant's waste-heat recovery device, includes first chamber, second chamber and heat exchanger, and the one of the first chamber
Side is provided with the inlet duct to enter to the damp and hot flue gas after desulfurization, and the first chamber is opposite with inlet duct another
Side is provided with the connecting pipe for being connected to the second chamber, and dehumidification solution is loaded in the first chamber；The heat exchanger
Coil pipe be set in the second chamber, the second chamber offers the outlet conduit to go out to flue gas.
Preferably, it is provided with removal of impurities curtain in the inlet duct.
Preferably, the removal of impurities curtain is multiple, and the top of the inlet duct is fixedly connected at the top of the removal of impurities curtain,
Multiple removal of impurities curtains are staggered.
Preferably, the inlet duct is interior, is provided with storage at the position below removal of impurities curtain lives together.
Preferably, the heat exchanger further includes having water pump and tank, one, water pump connection tank, other end with
One end of the coil pipe is connected, and the other end of the coil pipe is connected to the tank, and promotes to cool down when the pump working
The flow direction of water goes out direction to flue gas approach axis in the second chamber from flue gas.
Preferably, the coil pipe is in laterally disposed helical tubular structure, in each minimum point of helical tubular structure
Place is vertically arranged with diversion needle.
Preferably, the material of the coil pipe and diversion needle is modified fluoroplastics.
Preferably, the dehumidification solution is lithium-bromide solution or lithium chloride solution or calcium chloride solution.
Compared with prior art, the beneficial effects of the invention are as follows：The present invention is using comprehensive waste heat recovery mode, by two kinds
Waste heat recovery gathers, and to reach good effect, increases efficiency；And two ways is independent of each other, and can targetedly select
It selects two and works or only use together one of work, flexibility is very high, has broken away from conventional method only with a kind of mode
Carry out the limitation of recovery waste heat.
Description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment
Attached drawing be briefly described.
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is that the one of which of removal of impurities curtain in the present invention arranges schematic diagram（Overlook visual angle）；
Fig. 3 is that the one of which of removal of impurities curtain in the present invention arranges schematic diagram（Overlook visual angle）；
Fig. 4 is that the one of which of removal of impurities curtain in the present invention arranges schematic diagram（Overlook visual angle）.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes.Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without creative efforts
Embodiment shall fall within the protection scope of the present invention.
Embodiment
Fig. 1 is please referred to, the present invention provides a kind of coal-burning power plant's waste-heat recovery device, includes first chamber 1, second chamber
2 and heat exchanger 3, the side of first chamber 1 is provided with the inlet duct 4 to enter to the damp and hot flue gas after desulfurization, the first chamber
Room 1 is provided with the connecting pipe 5 for being connected to second chamber 2 in the other side opposite with inlet duct 4, is loaded in first chamber 1
Dehumidification solution；The coil pipe 6 of heat exchanger 3 is set in second chamber 2, and second chamber 2 offers the outlet to go out to flue gas
Pipeline 7.
When implementation, the damp and hot flue gas after wet desulphurization enters first chamber 1 by inlet duct 4, and 1 inside of first chamber is contained
Equipped with dehumidification solution, since dehumidification solution steam partial pressure is theoretically less than the partial pressure of damp and hot flue gas forever, in flue gas
Vapor is migrated to dehumidification solution, this process is also the process of heat exchange, and the humidity and heat of damp and hot flue gas can reduce,
In energy transfer to dehumidification solution, dehumidification solution can select one in lithium-bromide solution or lithium chloride solution or calcium chloride solution
Kind is a variety of；It dehumidifies by absorption process and receives hot flue gas by connecting pipe 5 into second chamber 2, interior be equipped with of second chamber 2 is changed
The coil pipe 6 of hot device 3, when cooling water is in 6 internal circulation of coil pipe, vapor in flue gas condenses on 6 surface of coil pipe and by heat
The cooling water in coil pipe 6 is passed to, being temporarily stored in second chamber 2 for condensed water is collected and recycles, condensed flue gas
It is discharged by outlet conduit 7.In the present invention, by absorption process carry out waste heat recovery and by condensation method carry out waste heat recovery this
Two ways is independent of each other, and can reach ideal in a certain mode（Or it is predetermined）In the case of organic efficiency, it may be selected to deactivate
Another way.If such as the mode using absorption process（It is carried out in first chamber 1）It, can when can reach ideal organic efficiency
Stop 6 inside flow of cooling water of coil pipe（Or into coil pipe 6 cooling water is not passed through it）, to deactivate condensation method；If using condensation method
Mode（It is carried out in second chamber 2）When can reach ideal organic efficiency, it is molten that the splendid attire dehumidifying in second chamber 2 can not had to
Liquid（Or existing dehumidification solution is exported）, to deactivate absorption process.It is this pointedly to select two and work or only make together
With the mode of one of work, flexibility is very high, has broken away from conventional method only with a kind of mode come the limitation of recovery waste heat.
Removal of impurities curtain 8 is provided in inlet duct 4.Removal of impurities curtain 8 is flaky texture, and the flue gas after wet desulphurization still has
The ingredients such as certain dust, acid, salt can pollute and dilute dehumidifying if these ingredients continuously enter first chamber 1
Solution such as enters second chamber 2, then can be gathered in condensation process on 6 lateral wall of coil pipe, causes acid corrosion and is formed moist
Dust stratification influences continuing for condensation, will certainly cause significant impact to the efficiency of waste heat recovery.Therefore, pass through setting removal of impurities curtain
8 so that the ingredients such as part dust, acid, salt, which are first attached on removal of impurities curtain 8, when flue gas is by removal of impurities curtain 8, in flue gas forms dust stratification,
It slowly falls under the effect of gravity again, it, can be by ingredients such as the part dust, acid, salt of the flue gas of process to reach filter effect
Remove, and avoids causing harmful effect to follow-up work.
The curtain 8 that cleans is multiple, and the top of removal of impurities curtain 8 is fixedly connected on the top of inlet duct 4, and multiple removal of impurities curtains 8 interlock
Arrangement.There are many forms that is staggered of curtain 8 that cleans, and can refer to Fig. 2, Fig. 3 and Fig. 4, the main principle that is staggered for the curtain 8 that cleans
It is the contact that flue gas can be allowed to pass through and realize as best one can flue gas and the curtain 8 that cleans, to have the function that filtering, removal of impurities.
Inlet duct 4 is interior, is provided with storage at the position of 8 lower section of removal of impurities curtain lives together 9.The humidity formed on removal of impurities curtain 8
Dust stratification can slowly be fallen, if not collected, being discharged, may block inlet duct 4.And the dust stratification fallen can pass through storage
Live together 9 collections.It is worth noting that, storage live together 9 settings in the inlet duct 4, be located at below removal of impurities curtain 8, and inlet duct 4 is simultaneously
It is exactly not necessarily regular circular pipe or rectangular tube, storage, which lives together 9, to be arranged in inlet tube to recessed, or using dissimilar materials
Below road 4.And store up and live together 9 and can also bottom be provided with the outlet of belt switch, switch is closed when use, and it is normal that storage lives together 9
The moist dust stratification of storage, can turn on the switch when necessary to allow moist dust stratification to be discharged from outlet.The switch for storing up the outlet at bottom for living together 9 can
To select plug, valve etc..
Heat exchanger 3 further includes having water pump 10 and tank 11,10 1 connection tanks 11 of water pump, other end and coil pipe 6
One end be connected, the other end of coil pipe 6 is connected to tank 11, and when water pump 10 works promotes the flow direction of cooling water in the second chamber
To go out direction to flue gas approach axis from flue gas in room 2.Flue-gas temperature differs bigger with 6 tube wall temperature of coil pipe, then is more easy to
The generation of condensation, and therefore set the flow direction of cooling water in the side that the side temperature entered close to flue gas is gone out higher than flue gas
It is set to from flue gas and goes out direction to flue gas approach axis, the condensation for being conducive to entire coil pipe 6 occurs.Coil pipe 6 is in laterally disposed
Helical tubular structure is vertically arranged with diversion needle 12 at each minimum point of helical tubular structure.Helical tubular structure
Each minimum point refers to, and in a spiralization cycle, always there are one minimum points（On the outside of tube wall）, and in entire helical tubular structure
In can have multiple this minimum points.Helicoidal structure can increase the area of condensation, improve waste heat recovery efficiency.Diversion needle 12
It is tapered for carefully stick-like structure, preferably bottom.In condensation process, condensed water is happened on the lateral wall of coil pipe 6, due to surface
The effect of power, condensed water can't at once be fallen from coil pipe 6, but save bit by bit just slowly be pooled to a certain extent minimum point from
Minimum point is fallen.Condensed water is attached on coil pipe 6, then can influence condensation efficiency.Diversion needle 12 is set at each minimum point, it can
The bottom of diversion needle 12 is drained into the condensed water for forming coil pipe 6 everywhere, and the bottom of diversion needle 12 is tiny, surface area is small,
Therefore it is easy to so that condensed water is fallen, so as to effectively improve the efficiency of waste heat recovery.
The material of coil pipe 6 and diversion needle 12 is modified fluoroplastics.Modified fluoroplastics can effectively avoid the part powder in flue gas
Corrosion of the ingredients such as dirt, acid, salt to coil pipe 6 and diversion needle 12, moreover it is possible to effectively prevent these impurity in coil pipe 6 and diversion needle 12
Surface forms dirt, moist dust stratification etc., also can quickly be fallen conducive to condensed water.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, all answer by the change or replacement that can be readily occurred in
It is included within the scope of the present invention.Therefore, protection scope of the present invention should be with the scope of the claims
It is accurate.
Claims (8)
1. a kind of coal-burning power plant's waste-heat recovery device, it is characterised in that：It include first chamber（1）, second chamber（2）And heat exchange
Device（3）, the first chamber（1）Side be provided with to after desulfurization damp and hot flue gas enter inlet duct（4）, described
First chamber（1）With inlet duct（4）The opposite other side is provided with the connection second chamber（2）Connecting pipe（5）,
The first chamber（1）Inside it is loaded with dehumidification solution；The heat exchanger（3）Coil pipe（6）It is set to the second chamber（2）
It is interior, the second chamber（2）Offer the outlet conduit to go out to flue gas（7）.
2. coal-burning power plant's waste-heat recovery device according to claim 1, it is characterised in that：The inlet duct（4）Inside set
It is equipped with removal of impurities curtain（8）.
3. coal-burning power plant's waste-heat recovery device according to claim 2, it is characterised in that：The removal of impurities curtain（8）To be multiple,
The removal of impurities curtain（8）Top be fixedly connected on the inlet duct（4）Top, multiple removal of impurities curtains（8）It is staggered.
4. coal-burning power plant's waste-heat recovery device according to claim 2 or 3, it is characterised in that：The inlet duct（4）
It is interior, be located at removal of impurities curtain（8）Storage is provided at the position of lower section to live together（9）.
5. coal-burning power plant's waste-heat recovery device according to claim 1, it is characterised in that：The heat exchanger（3）Further include
There is water pump（10）And tank（11）, the water pump（10）One connection tank（11）, other end and the coil pipe（6）One
End is connected, the coil pipe（6）The other end be connected to the tank（11）, and the water pump（10）Promote cooling water when work
Flow direction in the second chamber（2）It is interior to go out direction to flue gas approach axis from flue gas.
6. coal-burning power plant's waste-heat recovery device according to claim 1, it is characterised in that：The coil pipe（6）It is put in lateral
The helical tubular structure set is vertically arranged with diversion needle at each minimum point of helical tubular structure（12）.
7. coal-burning power plant's waste-heat recovery device according to claim 6, it is characterised in that：The coil pipe（6）With diversion needle
（12）Material be modified fluoroplastics.
8. coal-burning power plant's waste-heat recovery device according to claim 1, it is characterised in that：The dehumidification solution is lithium bromide
Solution or lithium chloride solution or calcium chloride solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810182250.XA CN108413427A (en) | 2018-03-06 | 2018-03-06 | Coal-burning power plant's waste-heat recovery device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810182250.XA CN108413427A (en) | 2018-03-06 | 2018-03-06 | Coal-burning power plant's waste-heat recovery device |
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| Publication Number | Publication Date |
|---|---|
| CN108413427A true CN108413427A (en) | 2018-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810182250.XA Pending CN108413427A (en) | 2018-03-06 | 2018-03-06 | Coal-burning power plant's waste-heat recovery device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108939889A (en) * | 2018-09-03 | 2018-12-07 | 东南大学 | A kind of solution deep dehumidifying smoke processing system |
| CN112161290A (en) * | 2020-10-19 | 2021-01-01 | 张仕艳 | Environment-friendly power equipment with energy recycle |
| CN113566607A (en) * | 2021-06-17 | 2021-10-29 | 江苏格安德环保工程科技有限公司 | Gas heat exchanger with internal baffle plate |
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| CN205408835U (en) * | 2016-01-04 | 2016-08-03 | 天津山澜情农业科技有限公司 | Prevent hydrometeor's thin film photovoltaic solar energy big -arch shelter |
| CN205447783U (en) * | 2016-03-19 | 2016-08-10 | 杨德俊 | Boiler flue gas treatment device |
| CN206582883U (en) * | 2017-03-07 | 2017-10-24 | 北京国电龙源环保工程有限公司 | A kind of indirect cooling system of coal-burning power plant's smoke evacuation |
| CN107726421A (en) * | 2017-11-07 | 2018-02-23 | 江苏久禾生物科技发展有限公司 | A kind of steam-type mushroom room heating system and its application process |
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| CN204438591U (en) * | 2015-01-30 | 2015-07-01 | 山东岱荣节能环保科技有限公司 | Boiler of power plant low exit temperature flue gas lime set reclaims and bootstrap system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108939889A (en) * | 2018-09-03 | 2018-12-07 | 东南大学 | A kind of solution deep dehumidifying smoke processing system |
| CN108939889B (en) * | 2018-09-03 | 2020-12-11 | 东南大学 | Solution deep dehumidification flue gas treatment system |
| CN112161290A (en) * | 2020-10-19 | 2021-01-01 | 张仕艳 | Environment-friendly power equipment with energy recycle |
| CN113566607A (en) * | 2021-06-17 | 2021-10-29 | 江苏格安德环保工程科技有限公司 | Gas heat exchanger with internal baffle plate |
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Application publication date: 20180817 |
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