CN109126364A - A kind of flue gas depth receives the treatment process of heat and purification - Google Patents
A kind of flue gas depth receives the treatment process of heat and purification Download PDFInfo
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- CN109126364A CN109126364A CN201811283013.9A CN201811283013A CN109126364A CN 109126364 A CN109126364 A CN 109126364A CN 201811283013 A CN201811283013 A CN 201811283013A CN 109126364 A CN109126364 A CN 109126364A
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- heat
- flue gas
- cooling water
- transfer zone
- heat transfer
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- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
-
- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/343—Heat recovery
-
- 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
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D21/0001—Recuperative heat exchangers
- F28D21/0014—Recuperative heat exchangers the heat being recuperated from waste air or from vapors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
-
- 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
-
- 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
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
A kind of flue gas depth receives the treatment process of heat and purification, is related to heating technique and purifies the technical field of exhaust gas.The present invention is recycled by waste heat, desulfurization and purification three units of eliminating white smoke are constituted, flue gas enters several grades of heat transfer zones of waste heat recovery unit, it is exchanged heat using deionization cooling water, and it may be implemented under condition of negative pressure lower than atmospheric boiling point vaporization heat absorption, it recycles fume afterheat in vapour form, is discharged using preheating section；Cooling flue gas after receiving heat can reduce evaporated quantity of water when entering desulfurization unit；The mist cooling for the purified eliminating white smoke unit of flue gas being discharged from desulfurization unit, film demisting, flue gas reheating are discharged after handling.One aspect of the present invention can make more fume afterheats with the higher vapor form recycling of heat content, on the other hand can also make flue gas deep purifying, realize minimum discharge of the exhanst gas outlet without " white cigarette ".
Description
Technical field
The present invention relates to heating techniques and purification exhaust gas technical field more particularly to a kind of flue gas depth to receive heat and purification
Treatment process.
Background technique
China is one of maximum country of world today's flue gas discharge capacity, and flue gas emission is concentrated mainly on electric power, refinery, heat
The fields such as power, coking, metallurgy.According to related specification requirement, flue gas enters all control substantially of the temperature before desulfurization 130 at present
Between~180 DEG C, even more than 200 DEG C of part.How sufficiently recycling fume afterheat, reducing waste heat discharge as far as possible is ability
One of the major subjects that field technique worker faces.
At the same time, to administer haze pollution, " white cigarette " to remove smoke when discharging is also imperative.Most chimneys
The white cigarette of discharge comes from what the vaporization of water during flue gas wet-treating was formed, for example, be discharged after wet desulphurization containing wet
The white cigarette that tail gas is formed.Therefore, effectively recycling thermal energy becomes the important prerequisite that flue gas takes off " white cigarette " again.
Many choice of technology cooling waters not can effectively solve " white cigarette " emission problem to flue gas cool-down in this way.Not only
Because of flue gas heat exchange necessarily adjoint equipment corrosion and inefficient, more important is when flue-gas temperature is at 130 DEG C or less, absolutely
Most of waste heat can only heat cooling water, cannot get steam substantially.And cooling tower must be passed through in order to be recycled
It is substantially that " white cigarette " and thermal energy are transferred to cooling tower from chimney to discharge in this way to cooling water temperature.
Currently, the processing technique tried to take into account flue gas waste heat recovery and eliminate white cigarette mainly has: 1) MGGH technology utilizes heat
The closed cycle of matchmaker's water flows, by the neat stress after being used to heat desulfurization and dedusting from the heat that former flue gas obtains, to reach enhancing
Flue gas diffusivity has a large amount of fume afterheat to be discharged into mitigate " white plume " problem of chimney from sense organ
In environment.2) phase-change heat-exchange and heat pipe heat exchanging technology, the technology utilize water vaporization absorption fume afterheat, but in order to avoid or drop
Low acid dewing corrosion and ash are stifled, and also because heat transfer boundary condition is limited, all control is at 130 DEG C or so substantially for final exhaust gas temperature, very
To higher." white cigarette " pollution problem of flue outlet is not can solve.3) it also has been reported that and is directly contacted by cooling water with flue gas, returned
It receives flue gas after desulfurization tail heat and obtains warm water, then the warm water is obtained into high temperature by the flue gas heat exchange of heat exchanger and higher temperature
Hot water obtains process steam finally by heat pump negative pressure evaporation.There are significant defects for this mode: firstly, low temperature after desulfurization
Flue gas still contains suspended matter and Determining Micro Acid, although can get waste heat in return using air-liquid contact, water has dissolved considerable in water
The impurity such as ash content are used further to high-temperature flue gas heat exchange and then generate steam, necessarily cause to be formed inside the heat exchanger tube of follow-up equipment rotten
Erosion and incrustation, and will accumulate rapidly, heat exchange efficiency and the safe handling of heat exchanger and evaporator can be seriously affected.Secondly, pressing this
The steam that technology path generates contains a small amount of sour gas and carbon dioxide etc., also can cause to corrode to heat pump compressor and ruin
It is bad.
As environmental protection policy requires the continuous improvement with Public environmental attitude, standard limit of smog release is also in increasingly harsh, society
May require that can be to flue gas deep purifying, and the new technology that can utilize as far as possible waste heat in flue gas.
Summary of the invention
The treatment process solved by the invention for being to provide a kind of flue gas depth and receiving heat and purification, can be sufficiently more than recovered flue gas
Heat and to generate steam, while " white cigarette " phenomenon when effectively eliminating flue gas emission, and can depth remove smoke abatement, aeroge etc.
Pollutant.
A kind of flue gas depth receives the treatment process of heat and purification, by waste heat recovery unit, desulfurization unit and purification eliminating white smoke
Unit is constituted.Flue gas obtains cooling flue gas by waste heat recovery unit, and cooling flue gas obtains cigarette after desulfurization after desulfurization unit
Gas, flue gas after desulfurization enter smoke stack emission after purified eliminating white smoke unit again.It, can be by the heat in flue gas by waste heat recovery unit
Can be recycled in vapour form, at the same make flue-gas temperature be reduced to 75 DEG C it is even lower, across sulfur-containing smoke gas " acid dew
Point "；The heat content of cooling flue gas reduces, so that the evaporation capacity of water is significantly reduced in desulfurization unit operation；Disappear using purification white
, it can be achieved that ultra-clean discharge of the smoke stack emission mouth without white cigarette after cigarette cell processing.
The capital equipment of waste heat recovery unit of the invention includes: heat transfer zone, circulating pump and preheating section；Heat exchange therein
Packet, negative pressure steaming is isolated from the negative pressure vapour-liquid infiltrated outside heat-exchanging tube bundle and flue by the negative pressure that the tube side in flue is cooling water in area
Air compressor and cooling water supplement nozzle and extraction nozzle are constituted.
Cooling water enters its tube side from preheating section bottom gathering tube in waste heat recovery unit of the invention, from water after exchanging heat
The top of preheating section is flowed out, and the cooling water supplement nozzle of heat transfer zone is entered back into, and cooling water heat absorption vaporization forms steam, certainly from negative pressure
Infiltration heat-exchanging tube bundle enters negative pressure Pistonless compressor after entering negative pressure vapour-liquid isolation packet separation liquid water, through negative pressure Pistonless compressor
Pressurization enters main steam range, the cooling water heat exchange circuit of the above composition.
Flue gas flows through shell side of the heat transfer zone negative pressure from infiltration tube bank after entering flue in waste heat recovery unit of the invention,
Cooled down with after cooling water heat exchange, finally flows through and remove desulfurization unit after water preheating section is further cooled down, the above composition flue gas changes
Hot loop.
Packet connection is isolated with negative pressure vapour-liquid from infiltration heat-exchanging tube bundle for negative pressure in heat transfer zone of the present invention；Negative pressure vapour-liquid isolation packet
Top steam pipe is connected to negative pressure Pistonless compressor entrance, and the outlet of negative pressure Pistonless compressor is connected to main steam range；The cooling water
Supplement nozzle following cooling water at liquid or vapour-liquid admixture one at or a few place positions be arranged, comprising: negative pressure vapour-liquid every
Connecting line and negative pressure the summarizing from infiltration heat-exchanging tube bundle of packet is isolated with negative pressure vapour-liquid from infiltration heat-exchanging tube bundle from packet, negative pressure
Pipe.
Compressor of the present invention selects roots-type, centrifugal and screw compressor one or more；Negative pressure is soaked certainly
It is consistent with the steam pressure at negative pressure Pistonless compressor entrance three to moisten heat-exchanging tube bundle, negative pressure vapour-liquid isolation packet, so that three is constituted
The heat transfer zone of independent operating condition.
The present invention can add step by step the heat transfer zone of different operating conditions, the heat exchange added according to the increase of flue-gas temperature and flow
Area's steam pressure is different, forms the heat exchange process of plural serial stage.
Cooling water of the present invention is the boiler feedwater that temperature is lower than 33 DEG C.
The heat exchange process of the plural serial stage of heat transfer zone of the present invention are as follows: the heat transfer zone includes negative pressure heat transfer zone, corresponding
Steam gauge pressure is between 0.06~0MPa of ﹣.
Further, when intake air temperature is higher than 110 DEG C, micro-positive pressure heat transfer zone can be added before negative pressure heat transfer zone, it is corresponding
Steam gauge pressure is between 0~0.25MPa；
Further, when intake air temperature be higher than 130 DEG C, positive pressure heat transfer zone can be set again before micro-positive pressure heat transfer zone, it is right
Steam gauge pressure is answered to be higher than 0.25MPa；
Further, the sequence that flue gas is contacted with heat transfer zone is to exchange heat again to negative pressure from positive pressure heat transfer zone to micro-positive pressure heat transfer zone
Area forms cooling flue gas after eventually passing through the preheating section cooling, into back segment desulfurization unit.
Cooling water circulating pump is set in the cooling water heat exchange circuit of the present invention, what the cooling water of liquid was wrapped from the isolation of negative pressure vapour-liquid
Bottom enters pump inlet, then converges after circulating pump is pressurized with the cooling water after preheating, send to the cooling water benefit of heat transfer zone
Fill nozzle.
In the cooling water heat exchange circuit of the heat exchange process of plural serial stage of the present invention, the liquid of vapour-liquid isolation packet bottom
Water, a kind of endless form are that vacuum flashing makes the heat transfer zone to rear stage heat transfer zone step by step from maximum pressure by pressure reducing valve
Fair current evaporation is constituted with flue gas；The liquid water of negative pressure heat transfer zone is pressurized by circulating pump to be converged with the cooling water after preheating, is conveyed
Cooling water to positive pressure heat transfer zone supplements nozzle.Another endless form is to be pressurized to previous stage step by step by circulating pump pressurization to change
Hot-zone makes the heat transfer zone and flue gas constitute countercurrent evaporation；The liquid water of maximum pressure positive pressure heat transfer zone is flashed by pressure reducing valve
The cooling water of lower pressure supplements nozzle at least one.
Further, in the cooling water heat exchange circuit of the heat exchange process of plural serial stage of the present invention, gas-liquid isolation packet top
Steam, a kind of technique flow direction is to constitute steam directly by being transported to main steam range after compressor boost by Pistonless compressor
Pressurization in parallel.Another technique flow direction is to be merged into higher stage compressor import, structure from the lower compressor outlet of pressure
At the series boosting of steam pressure from low to high, it is then delivered to main steam range.
The present invention can make cooling water be transported to high pressure heat exchange area from low pressure heat transfer zone by the pressurization of circulating pump, can make cold
But the online internal circulating load of water is greater than evaporation capacity, and the ratio in linear flow rate and evaporation capacity of cooling water may be selected to be (1.01~3): 1,
The proportional region being particularly suitable for is (1.2~2): 1.
Cooling water of the present invention increases since electrolyte in water concentration can evaporate, can recycle from preheating section continuous supplementation
End produces a part of water.Because the part for vaporizing and producing leads to the reduction of cooling water, the cooling water that equivalent can be added is carried out
Supplement, and magnitude of recruitment is greater than evaporation capacity, evaporates remaining liquid water from cooling water extraction nozzle discharge.
Purification eliminating white smoke unit of the invention includes: spray tower film demister and flue gas reheater；Spray tower therein
Cooling spraying device is arranged in internal upper part, and lower part is equipped with tower tray；Microporous hydrophilic membrane is set in film demister therein；Microporous hydrophilic membrane
Film demister is divided into the gas side of the film surface side of contact flue gas and does not contact the part of liquid side two of the reverse side of flue gas,
By flue gas after spraying containing droplet, the setting of liquid side collects droplet formation with water and extraction for imports infiltration film for gas side
Water, and the pressure of maintaining liquid side is lower than the pipeline opening of flue gas pressures；Space and film demister in tower except cooling spraying device
Gas side connection, film demister gas side is connected to chimney, setting flue gas reheater between film demister and chimney import.
In purification eliminating white smoke unit of the invention, cooling water enters the cooling spraying device on spray tower top, a part of cold
But it collects and is then discharged out on tower tray of the water through spray tower lower part, remaining cooling water is after film demister liquid side is collected through by set
Pipeline opening discharge, constitute the spraying receipts mist circuit of cooling water.
In purification eliminating white smoke unit of the invention, flue gas after desulfurization successively passes through spray tower, film demister and reheater,
Flue gas cools down and washs in spray tower, then obtains low temperature saturated air, low temperature saturated air through demister removal droplet and micro- foam etc.
It is heated to be unsaturated flue gas through flue gas reheater, finally enters smoke stack emission, constitutes the purification eliminating white smoke circuit of flue gas.
Spray tower top cooling spraying device of the invention uses industry cooling water spray, and the mist droplet particle size of generation is 20~
400 μm, the tower tray of bottom is preferably at least one of float valve tray and bubble cap tray.Flue gas enters in the spray tower first
Across bottom tray, then with spraying counter current contacting.Hydrophilic film in film demister of the present invention, the aperture of pore membrane is 5~
4000nm, planform are one or more of tubulose, plate, honeycomb and doughnut, and material is small with water contact angle
In 75 ° of organic or inorganic material.Further, flue gas after desulfurization enters before film demister, in advance in the micropore film liquid
Side water-filling infiltrates microporous barrier, and controlling liquid lateral pressure makes liquid lateral pressure lower than flue gas pressures.
Further, the heat source of flue gas reheater of the present invention includes steam caused by front end waste heat recycles.
Further, gas cleaning eliminating white smoke circuit of the invention, including film demister is arranged inside spray tower, the two
Merging becomes a single devices, and film demister (positioned at the top of cooling spraying device, is arranged between film demister and spray tower
Hydraulic barrier is buffered so that the water droplet that flue gas wraps up in band is isolated.
The invention has the advantages that:
The present invention is by the pressure of manipulation Pistonless compressor entrance until negative pressure, inhales cooling water with controlled correspondence low temperature
Hot vapour forms bigger heat transfer temperature difference, and converts steam for smoke heat energy with smaller heat exchange equipment scale, higher efficiency
Latent heat, smoke heat energy are able to depth recycling and utilize.
The present invention can force flue gas to be reduced to lower temperature, reduce the evaporated quantity of water of desulfurization unit, reduce white cigarette processing
Load.
It is higher that the heat exchange process that the present invention passes through setting plural serial stage can make each heat transfer zone be at heat exchange efficiency
Operating condition, and keep the ineffective power consumption of Pistonless compressor lower.
The present invention can be strengthened by the way that circulating pump is arranged in cooling water heat exchange circuit from the heat transfer effect for infiltrating heat-exchanging tube bundle.
The present invention can be such that the thermal energy before high-temperature flue gas into desulfurizing tower is largely recycled, and carry in depth removal flue gas
The impurity such as other dispersed granules, " white cigarette " pollution for the outlet that removes smoke realizes minimum discharge.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is the structural schematic diagram of the embodiment of the present invention 1.
Fig. 3 is the structural schematic diagram of the embodiment of the present invention 2.
Fig. 4 is the structural schematic diagram of the embodiment of the present invention 3.
Fig. 5 is the structural schematic diagram of the embodiment of the present invention 4.
In figure, 11, negative pressure from infiltrating heat-exchanging tube bundle, 12, negative pressure vapour-liquid isolation packet, 13, negative pressure Pistonless compressor, 14, follow
Ring pump, 21, micro-positive pressure from infiltrating heat-exchanging tube bundle, 22, micro-positive pressure vapour-liquid isolation packet, 23, micro-positive pressure Pistonless compressor, 24, circulation
Pump two, 31, positive pressure are from infiltrating heat-exchanging tube bundle, 32 positive pressure vapour-liquids isolation packet, 33, positive pressure Pistonless compressor, and 41, positive pressure changes from infiltration
Heat pipe bundle two, 42 positive pressure vapour-liquids isolation packet two, 43, positive pressure Pistonless compressor two, 5, water preheating section, 6- flue, 7- spray tower, 8-
Demister, 9- flue gas reheater.
Specific embodiment
As shown in Figures 1 to 5, a kind of flue gas depth receives the treatment process of heat and purification, including waste heat recovery unit, desulfurization
Unit and purification three units of eliminating white smoke unit:
Flue gas obtains cooling flue gas by waste heat recovery unit, and cooling flue gas obtains cigarette after desulfurization after desulfurization unit
Gas, flue gas after desulfurization enter smoke stack emission after purified eliminating white smoke unit again；
Wherein waste heat recovery unit includes: heat transfer zone, circulating pump 14 and water preheating section 5；The heat transfer zone includes that setting exists
Tube side in flue 6 is that packet, negative pressure steam is isolated from the negative pressure vapour-liquid infiltrated outside heat-exchanging tube bundle and flue 6 in the negative pressure of cooling water
Compressor and cooling water supplement nozzle and extraction nozzle；
Cooling water enters tube side from 5 bottom gathering tube of water preheating section in waste heat recovery unit, from water preheating section 5 after exchanging heat
Top outflow, enter back into heat transfer zone cooling water supplement nozzle, cooling water heat absorption vaporization forms steam, from negative pressure from infiltration change
After the tube side of heat pipe bundle 11 enters 12 separation liquid water of negative pressure vapour-liquid isolation packet, into negative pressure Pistonless compressor 13, steamed through negative pressure
The pressurization of air compressor 13 enters main steam range, the cooling water heat exchange circuit of the above composition；
Flue gas enters the shell side that flue flows through oneself infiltration heat-exchanging tube bundle 11 of the negative pressure of heat transfer zone later in waste heat recovery unit,
Cooled down with after cooling water heat exchange, finally flows through and remove desulfurization unit after water preheating section 5 is further cooled down, the above composition flue gas changes
Hot loop.
As shown in Figures 1 to 5, packet connection is isolated with vapour-liquid from infiltration heat-exchanging tube bundle in heat transfer zone of the present invention；Vapour-liquid every
It is connected to from packet top steam pipe with Pistonless compressor entrance, Pistonless compressor outlet is connected to main steam range；The cooling water supplement
The remittance that vapour-liquid is isolated packet, the connecting line wrapped is isolated with vapour-liquid from infiltration heat-exchanging tube bundle, infiltrating heat-exchanging tube bundle certainly is arranged in nozzle
In general pipeline one at or a few place positions；
It is consistent with the steam pressure at Pistonless compressor entrance three from infiltration heat-exchanging tube bundle, vapour-liquid isolation packet, thus three
Constitute the heat transfer zone of independent operating condition；Every grade of steam pressure difference when heat transfer zone is more than level-one, forms the heat exchange process of plural serial stage.
Cooling water is the boiler feedwater that temperature is lower than 33 DEG C, and the heat transfer zone includes negative pressure heat transfer zone, corresponding steam gauge pressure
Between 0.06~0MPa of ﹣.Including the negative pressure infiltration heat-exchanging tube bundle 11, and the negative pressure being arranged in outside flue 6 certainly being arranged in flue 6
12 connection of packet is isolated with negative pressure vapour-liquid from infiltration heat-exchanging tube bundle 11 for vapour-liquid isolation packet 12, negative pressure Pistonless compressor 13, the negative pressure,
The top steam pipe of negative pressure vapour-liquid isolation packet 12 is connected to the entrance of negative pressure Pistonless compressor 13, the outlet of negative pressure Pistonless compressor 13
It is connected to main steam range；The bottom conduit of negative pressure vapour-liquid isolation packet 12 is connected to negative pressure from infiltration heat-exchanging tube bundle 11.Flue 6 it is interior
Water preheating section 5 is arranged in portion, and the bottom conduit connection of packet 12, the water preheating section 5 are isolated with negative pressure vapour-liquid for the top of water preheating section 5
Bottom is equipped with make-up water pipeline, and top is equipped with outlet pipeline and is connected with circulating pump 14, and 14 export pipeline of circulating pump is isolated with vapour-liquid
Packet connection.
Micro-positive pressure heat transfer zone is added before negative pressure heat transfer zone, corresponding steam gauge pressure is between 0~0.25MPa.It is born in flue 6
It presses from the side setting micro-positive pressure infiltrated on heat-exchanging tube bundle 11 far from water preheating section 5 from infiltration heat-exchanging tube bundle 21, micro-positive pressure soaks certainly
Profit heat-exchanging tube bundle 21 outlet be isolated with micro-positive pressure vapour-liquid packet 22 connection, micro-positive pressure vapour-liquid isolation wrap 22 top steam pipe with it is micro- just
The entrance connection of Pistonless compressor 23 is pressed, the outlet of micro-positive pressure Pistonless compressor 23 is connected to main steam range；Micro-positive pressure vapour-liquid every
12 connection of packet is isolated by pressure reducing valve with negative pressure vapour-liquid for lower part from packet 22；The outlet of negative pressure Pistonless compressor 13 passes through piping connection
To 23 import of micro-positive pressure Pistonless compressor.The inside of flue 6 is arranged water preheating section 5, the top of water preheating section 5 and negative pressure vapour-liquid every
Bottom conduit connection from packet 12,5 bottom of water preheating section are equipped with make-up water pipeline, and top is equipped with outlet pipeline and circulating pump
14 are connected, and packet connection is isolated with vapour-liquid for 14 export pipeline of circulating pump.
Positive pressure heat transfer zone is set again before micro-positive pressure heat transfer zone, that is, contains negative pressuren zone, micro-positive pressure area, zone of positive pressure, it is corresponding
Steam gauge pressure is higher than 0.25MPa.Micro-positive pressure infiltrates heat-exchanging tube bundle 11 far from negative pressure from infiltration heat-exchanging tube bundle 21 certainly in flue 6
Positive pressure is arranged from infiltration heat-exchanging tube bundle 31 in side, and packet 32 is isolated with positive pressure vapour-liquid and connects for the upper end of positive pressure from infiltration heat-exchanging tube bundle 31
Logical, the top tracheae of positive pressure vapour-liquid isolation packet 32 is connected to main steam range；The lower part of positive pressure vapour-liquid isolation packet 32 passes through pressure reducing valve
21 connection of packet is isolated with micro-positive pressure vapour-liquid.The inside of flue 6 is arranged water preheating section 5, the top of water preheating section 5 and negative pressure vapour-liquid every
Bottom conduit connection from packet 12,5 bottom of water preheating section are equipped with make-up water pipeline, and top is equipped with outlet pipeline and circulating pump
14 are connected, and packet connection is isolated with vapour-liquid for 14 export pipeline of circulating pump.
As shown in Figures 1 to 5, purification eliminating white smoke unit of the invention includes sequentially connected spray tower 7, film demister 8
With flue gas reheater 9；Cooling spraying device is arranged in 7 internal upper part of spray tower, and lower part is equipped with tower tray；Setting parent in film demister 8
Water microporous barrier；Film demister 8 is divided into the gas side for contacting the film surface side of flue gas and the back for not contacting flue gas by microporous hydrophilic membrane
The part of liquid side two of face side, gas side by flue gas after spraying containing droplet, the setting of liquid side for imports infiltrate film use water
The water that droplet is formed is collected with extraction, and the pressure of maintaining liquid side is lower than the pipeline opening of flue gas pressures；Except cooling spray in spray tower 7
Space except mist device is connected to 8 gas side of film demister, and 8 gas side of film demister is connected to chimney, film demister 8 and chimney into
Flue gas reheater 9 is set between mouthful；Cooling water enters the cooling spraying device on 7 top of spray tower, and a part of cooling water is through spraying
It is discharged after being collected on the tower tray of 7 lower part of mist tower, remaining cooling water is after 8 liquid side of film demister is collected through by set pipeline opening
Discharge, constitutes the spraying receipts mist circuit of cooling water；Flue gas cools down and washs in spray tower 7, then removes through 8 gas side of film demister
Droplet and micro- foam etc. obtain low temperature saturated air, and low temperature saturated air is heated to be unsaturated flue gas through flue gas reheater 9, finally enters
Smoke stack emission constitutes the purification eliminating white smoke circuit of flue gas.
As shown in figure 3, gas cleaning eliminating white smoke circuit of the invention, including film demister 8 is arranged in spray tower 7
Portion, the two, which merges, becomes a single devices, and film demister 8 is located at the top of cooling spraying device, film demister 8 and cooling spray
Setting buffering hydraulic barrier is between mist device to be isolated the water droplet that flue gas wraps up in band.
Embodiment 1
As shown in Fig. 2, a kind of flue gas depth receives the treatment process of heat and purification, it to be used for natural gas boiler fume treatment, day
The Gas Parameters of right gas boiler are as shown in table 1, and the present embodiment technique only includes waste heat recovery unit.
Waste heat recovery unit device includes: heat transfer zone, circulating pump, water preheating section 5, and wherein heat transfer zone is by the pipe in flue 6
Journey is that vapour-liquid isolation packet, Pistonless compressor and the cooling water from outside infiltration heat-exchanging tube bundle and flue 6 of cooling water supplement nozzle
It is constituted with extraction nozzle；Packet connection is isolated with vapour-liquid from infiltration heat-exchanging tube bundle in heat transfer zone；Vapour-liquid isolation packet top steam pipe with
The connection of Pistonless compressor entrance, Pistonless compressor outlet are connected to main steam range；The cooling water supplement nozzle setting is being soaked certainly
Profit heat-exchanging tube bundle is isolated on the connecting line of packet with vapour-liquid.
Specific implementation method are as follows:
Intake air temperature be 290 DEG C, heat transfer zone be arranged level Four serial flow: the different two-stage positive pressure heat transfer zone of pressure, it is micro- just
Press heat transfer zone, negative pressure heat transfer zone, the boiler feedwater that cooling water 0 is 30 DEG C.
Wherein, the steam gauge pressure of positive pressure heat transfer zone is between 0.3MPa~1.0MPa；The steam gauge pressure of micro-positive pressure heat transfer zone is situated between
In 0~0.25MPa；Negative pressure heat transfer zone generates the gauge pressure of steam between -0.05~0MPa；
Flue gas enter after flue 6 flow successively through positive pressure from infiltration heat-exchanging tube bundle 2 41, positive pressure from infiltration heat-exchanging tube bundle 31,
Micro-positive pressure exchanges heat from infiltration heat exchange 21, negative pressure from infiltration heat-exchanging tube bundle 11 with from the boiler feedwater in infiltration heat-exchanging tube bundle tube side
Water preheating section 5 is entered by cooling afterwards；
Boiler feedwater enters its tube side from 5 bottom gathering tube of water preheating section, flows after exchanging heat from the top of water preheating section 5
Out, it is sent by circulating pump 2 24 to from infiltration heat-exchanging tube bundle and is isolated on the connecting line wrapped with vapour-liquid, so that boiler feedwater is full of
From infiltration heat-exchanging tube bundle, and from infiltration heat-exchanging tube bundle tube side interior suction hot vapourization formed steam, steam from from infiltration heat-exchanging tube bundle
Enter Pistonless compressor after packet separation liquid water is isolated into vapour-liquid；
Wherein, the steam at 32 top of positive pressure vapour-liquid isolation packet is merged into Pistonless compressor from the outlet of positive pressure Pistonless compressor 33
Merge after 2 43 inlet plenums and is sent into main steam range；The steam at 12 top of negative pressure vapour-liquid isolation packet goes out from negative pressure Pistonless compressor 13
Mouth merges feeding main steam range after being merged into 23 inlet plenum of micro-positive pressure Pistonless compressor；Pistonless compressor is centrifugal compressor
Machine.
Wherein, the liquid water of 2 42 bottoms of positive pressure vapour-liquid isolation packet is flashed to positive pressure certainly along the direction A4-a3 by pressure reducing valve
Infiltration heat-exchanging tube bundle 31 is isolated on the connecting line of packet 32 with positive pressure vapour-liquid, and the liquid water of 32 bottoms of positive pressure vapour-liquid isolation packet leads to
It crosses pressure reducing valve and is flashed to micro-positive pressure heat transfer zone along the direction A3-a2, the liquid water of 22 bottoms of micro-positive pressure vapour-liquid isolation packet passes through decompression
Valve is flashed to negative pressure heat transfer zone along the direction A2-a1, and the liquid water of 11 bottoms of negative pressure vapour-liquid isolation packet is discharged along the direction A1, by following
14 pressurization of ring pump is transported to positive pressure along the direction a4 by circulating pump 2 24 after converging with the boiler feedwater after preheating and infiltrates heat exchange certainly
Restrain the connecting line between 2 41 and positive pressure vapour-liquid isolation packet 2 42；The ratio in linear flow rate and evaporation capacity of boiler feedwater is
2:1；
Boiler feedwater is from 5 continuous supplementation of water preheating section, and magnitude of recruitment is greater than liquid evaporation amount, evaporate remaining liquid water from
The cooling water extraction nozzle discharge of 14 outlet of primary cycle pump.
Natural gas boiler flue gas finally flows through water preheating section 5 and is further cooled to 75 DEG C, and recyclable steam total amount is not
Lower than 4500kg/h.
1 natural gas boiler flue gas inlet condition table of table
Embodiment 2
As shown in figure 3, a kind of flue gas depth receives the treatment process of heat and purification, it is used for refinery fume treatment, is returned by waste heat
It receives unit, desulfurization unit and purification eliminating white smoke unit to constitute, refinery Gas Parameters are as shown in table 2.
Waste heat recovery unit device includes: heat transfer zone, circulating pump and water preheating section 5, and wherein heat transfer zone is by flue 6
Tube side is the vapour-liquid isolation packet from outside infiltration heat-exchanging tube bundle and flue 6, Pistonless compressor and the cooling water supplement pipe of cooling water
Mouth and extraction nozzle are constituted；Packet connection is isolated with vapour-liquid from infiltration heat-exchanging tube bundle in heat transfer zone；Vapour-liquid isolation packet top steam pipe
It is connected to Pistonless compressor entrance, Pistonless compressor outlet is connected to main steam range；Vapour-liquid isolation packet bottom and pump inlet
Connection, circulating-pump outlet are connected to from infiltration heat-exchanging tube bundle bottom, and the cooling water supplement nozzle is arranged in 5 import of preheating section.
Specific implementation method are as follows:
Intake air temperature be greater than 130 DEG C, therefore heat transfer zone be arranged thtee-stage shiplock process: positive pressure heat transfer zone, micro-positive pressure heat transfer zone,
Negative pressure heat transfer zone, the boiler feedwater that cooling water is 30 DEG C.
Wherein, the gauge pressure that positive pressure heat transfer zone generates steam is controlled in 0.3MPa；The gauge pressure of micro-positive pressure heat transfer zone generation steam
Control is in 0.1MPa；The gauge pressure that negative pressure heat transfer zone generates steam is controlled in -0.045MPa；
Flue gas, which enters after flue 6, flows successively through positive pressure from infiltration heat-exchanging tube bundle 31, micro-positive pressure from infiltration heat exchange 21, negative pressure
From infiltration heat-exchanging tube bundle 11, water preheating section 5 is entered by cooling with from after the boiler feedwater heat exchange in infiltration heat-exchanging tube bundle tube side；
Boiler feedwater enters its tube side from 5 bottom gathering tube of water preheating section, flows out after exchanging heat from the top of water preheating section 5
It flows into along b1 from infiltration heat-exchanging tube bundle and full of from infiltration heat-exchanging tube bundle, is formed from infiltration heat-exchanging tube bundle tube side interior suction hot vapour
Steam, steam enter Pistonless compressor after entering vapour-liquid isolation packet separation liquid water from infiltration heat-exchanging tube bundle；
Wherein, it is total to be sent directly into steam after the pressurization of positive pressure Pistonless compressor 33 for the steam at 32 top of positive pressure vapour-liquid isolation packet
Pipe；Negative pressure vapour-liquid isolation packet 12 top steam from negative pressure Pistonless compressor 13 outlet be merged into micro-positive pressure Pistonless compressor 23 into
Merge after mouth pressurization and is sent into main steam range；
Wherein, the liquid water of 12 bottoms of negative pressure vapour-liquid isolation packet, is delivered to micro-positive pressure along the direction B1-b2 by circulating pump 14
From infiltration heat-exchanging tube bundle 21, the liquid water of 22 bottoms of micro-positive pressure vapour-liquid isolation packet is conveyed by circulating pump 2 24 along the direction B2-b3
To positive pressure from infiltration heat-exchanging tube bundle 31, the liquid water of 32 bottoms of positive pressure vapour-liquid isolation packet is flashed to micro-positive pressure by pressure reducing valve and changes
Hot-zone, boiler feedwater is 1.3:1 in the ratio of linear flow rate and evaporation capacity；
Boiler feedwater is from 5 continuous supplementation of water preheating section, and magnitude of recruitment is greater than evaporation capacity, evaporates remaining liquid water from positive pressure
Cooling water extraction nozzle discharge of vapour-liquid isolation 32 bottoms of packet along the direction B3.
2 refinery flue gas inlet condition table of table
The refinery flue gas finally flows through water preheating section 5 and is further cooled to 80 DEG C, and recyclable steam total amount is not low
In 8500kg/h.
Cooling flue gas enters desulfurizer and carries out wet desulphurization, and flue gas after desulfurization enters purification eliminating white smoke unit, and purification disappears
White cigarette unit essential equipment (UEE) includes: spray tower 7, film demister 8 and flue gas reheater 9；7 internal upper part of spray tower setting therein
Cooling spraying device, lower part are equipped with tower tray；Space is connected to the gas side of film demister 8 in tower except cooling spraying device, film
Demister 8 is connected to chimney, and flue gas reheater 9 is arranged between film demister 8 and chimney import；
Wherein film demister 8 is arranged inside spray tower 7, and the two, which merges, becomes a single devices, and film demister 8 is located at
The top of cooling spraying device, setting buffering hydraulic barrier is between film demister 8 and spray tower 7 to be isolated the water that flue gas wraps up in band
Drop.
Cooling flue gas temperature after wet desulphurization is reduced to 52 DEG C, and flue gas after desulfurization enters in spray tower 7, mist cooling to 45
DEG C, the water spray 233m of spray tower 73/ h, 20~400 μm of mist droplet particle size, vapor partial pressure is down to 9.6kPa, shower water in flue gas
Temperature rises to 51 DEG C by 33 DEG C；Flue gas enters removal entrainment water mist in film demister 8 after spraying, and film demister 8 is 50nm tubular type
The box component of ceramic membrane, transmembrane pressure 0.02MPa；The low temperature saturated air that film demister 8 obtains is heated through flue gas reheater 9
To 65 DEG C, relative humidity is down to 39%, is discharged by chimney.
Embodiment 3
As shown in figure 4, a kind of flue gas depth receives the treatment process of heat and purification, it is used for coke-oven plant's fume treatment, by waste heat
Recovery unit, desulfurization unit and purification eliminating white smoke unit are constituted, and coking Gas Parameters are as shown in table 3.
Waste heat recovery unit device includes: heat transfer zone, circulating pump and water preheating section 5, and wherein heat transfer zone is by flue 6
Tube side is the vapour-liquid isolation packet from outside infiltration heat-exchanging tube bundle and flue 6, Pistonless compressor and the cooling water supplement pipe of cooling water
Mouth and extraction nozzle are constituted；Packet connection is isolated with vapour-liquid from infiltration heat-exchanging tube bundle in heat transfer zone；Vapour-liquid isolation packet top steam pipe
It is connected to Pistonless compressor entrance, Pistonless compressor outlet is connected to main steam range；Vapour-liquid isolation packet bottom and pump inlet
Connection, the connecting line that circulating-pump outlet is isolated between packet with from infiltration heat-exchanging tube bundle and vapour-liquid are connected to, the cooling water supplement
Nozzle is arranged in 5 import of water preheating section；
Specific implementation method are as follows:
Intake air temperature be greater than 130 DEG C, therefore heat transfer zone be arranged thtee-stage shiplock process: positive pressure heat transfer zone, micro-positive pressure heat transfer zone,
Negative pressure heat transfer zone, the boiler feedwater that cooling water is 30 DEG C.
Wherein, the gauge pressure that positive pressure heat transfer zone generates steam is controlled in 0.3MPa；The gauge pressure of micro-positive pressure heat transfer zone generation steam
Control is in 0.05MPa；The gauge pressure that negative pressure heat transfer zone generates steam is controlled in -0.055MPa；
Flue gas, which enters after flue 6, flows successively through positive pressure from infiltration heat-exchanging tube bundle 31, micro-positive pressure from infiltration heat exchange 21, negative pressure
From infiltration heat-exchanging tube bundle 11, water preheating section 5 is entered by cooling with from after the boiler feedwater heat exchange in infiltration heat-exchanging tube bundle tube side；
Boiler feedwater enters its tube side from 5 bottom gathering tube of water preheating section, flows out after exchanging heat from the top of water preheating section 5
It flows into along b1 from infiltration heat-exchanging tube bundle and full of from infiltration heat-exchanging tube bundle, is formed from infiltration heat-exchanging tube bundle tube side interior suction hot vapour
Steam, steam enter Pistonless compressor after entering vapour-liquid isolation packet separation liquid water from infiltration heat-exchanging tube bundle；
Wherein, the steam at 32 top of positive pressure vapour-liquid isolation packet is sent directly into main steam range；12 top of negative pressure vapour-liquid isolation packet
Steam be merged into after 23 inlet plenum of micro-positive pressure Pistonless compressor from the outlet of negative pressure Pistonless compressor 13 and merge that be sent into steam total
Pipe；
Wherein, the liquid water of 12 bottoms of negative pressure vapour-liquid isolation packet, is delivered to micro-positive pressure along the direction B1-b2 by circulating pump 14
Connecting line between infiltration heat-exchanging tube bundle 21 and micro-positive pressure vapour-liquid isolation packet 22, the liquid of 22 bottoms of micro-positive pressure vapour-liquid isolation packet
State water, by circulating pump 2 24 along the direction B2-b3 be transported to positive pressure from infiltration heat-exchanging tube bundle 31 and positive pressure vapour-liquid isolation packet 32 it
Between connecting line, the liquid water of 32 bottoms of positive pressure vapour-liquid isolation packet is flashed to micro-positive pressure from infiltrating heat exchanger tube by pressure reducing valve
Connecting line between beam 21 and micro-positive pressure vapour-liquid isolation packet 22, boiler feedwater is 1.5 in the ratio of linear flow rate and evaporation capacity:
1；
Boiler feedwater is from 5 continuous supplementation of water preheating section, and magnitude of recruitment is greater than evaporation capacity, evaporates remaining liquid water from positive pressure
Cooling water extraction nozzle discharge of vapour-liquid isolation 32 bottoms of packet along the direction B3.
3 coking flue gas inlet condition table of table
The coking flue gas finally flows through water preheating section 5 and is further cooled to 75 DEG C, and recyclable steam total amount is not low
In 3600kg/h.
Cooling flue gas enters desulfurizer and carries out wet desulphurization, and flue gas after desulfurization enters purification eliminating white smoke unit, and purification disappears
White cigarette unit essential equipment (UEE) includes: spray tower 7, film demister 8 and flue gas reheater 9；7 internal upper part of spray tower setting therein
Cooling spraying device, lower part are equipped with tower tray；Space is connected to the gas side of film demister 8 in tower except cooling spraying device, film
Demister 8 is connected to chimney, and flue gas reheater 9 is arranged between film demister 8 and chimney import.
Cooling flue gas temperature after wet desulphurization is reduced to 60 DEG C, and flue gas after desulfurization enters in spray tower 7, mist cooling to 50
DEG C, the water spray 188m of spray tower 73/ h, sprays coolant-temperature gage by 33 DEG C and rises to 58 DEG C by 30~500 μm of mist droplet particle size；After spraying
Flue gas enters removal entrainment water mist in film demister 8, and film demister 8 is two-stage series connection, using 200nm organic film constriction Cheng Mo
Block, transmembrane pressure 0.02MPa；The low temperature saturated air that film demister 8 obtains is heated to 75 DEG C through flue gas reheater 9, relatively wet
Degree is down to 39%, is discharged by chimney.
Embodiment 4
As shown in figure 5, a kind of flue gas depth receives the treatment process of heat and purification, handled for fire coal boiler fume, by remaining
Heat recovery units, desulfurization unit and purification eliminating white smoke unit are constituted, and fire coal boiler fume parameter is as shown in table 4.
Waste heat recovery unit device includes: heat transfer zone, circulating pump and preheating section 5, and wherein heat transfer zone is by the pipe in flue 6
Journey is that vapour-liquid isolation packet, Pistonless compressor and the cooling water from outside infiltration heat-exchanging tube bundle and flue 6 of cooling water supplement nozzle
It is constituted with extraction nozzle；Packet connection is isolated with vapour-liquid from infiltration heat-exchanging tube bundle in heat transfer zone；Vapour-liquid isolation packet top steam pipe with
The connection of Pistonless compressor entrance, Pistonless compressor outlet are connected to main steam range；Vapour-liquid isolation packet bottom is followed by pipeline connection
The connecting line that ring pump discharge is isolated between packet with from infiltration heat-exchanging tube bundle and vapour-liquid is connected to, the cooling water supplement nozzle setting
In 5 import of water preheating section；
Specific implementation method are as follows:
Intake air temperature be greater than 130 DEG C, therefore heat transfer zone be arranged thtee-stage shiplock process: positive pressure heat transfer zone, micro-positive pressure heat transfer zone,
Negative pressure heat transfer zone, the boiler feedwater that cooling water is 30 DEG C.
Wherein, the gauge pressure that positive pressure heat transfer zone generates steam is controlled in 0.35MPa；The gauge pressure of micro-positive pressure heat transfer zone generation steam
Control is in 0.05MPa；The gauge pressure that negative pressure heat transfer zone generates steam is controlled in -0.055MPa；
Flue gas, which enters after flue 6, flows successively through positive pressure from infiltration heat-exchanging tube bundle 31, micro-positive pressure from infiltration heat exchange 21, negative pressure
From infiltration heat-exchanging tube bundle 11, water preheating section 5 is entered by cooling with from after the boiler feedwater heat exchange in infiltration heat-exchanging tube bundle tube side；
Boiler feedwater enters its tube side from 5 bottom gathering tube of water preheating section, flows after exchanging heat from the top of water preheating section 5
Out, it is sent by circulating pump 14 to from infiltration heat-exchanging tube bundle and is isolated on the connecting line wrapped with vapour-liquid, so that boiler feedwater is full of certainly
Infiltrate heat-exchanging tube bundle, and from infiltration heat-exchanging tube bundle tube side interior suction hot vapourization formed steam, steam from from infiltration heat-exchanging tube bundle into
Enter Pistonless compressor after entering vapour-liquid isolation packet separation liquid water；
Wherein, the steam at 32 top of positive pressure vapour-liquid isolation packet is sent directly into main steam range；12 top of negative pressure vapour-liquid isolation packet
Steam be merged into after 23 inlet plenum of micro-positive pressure Pistonless compressor from the outlet of negative pressure Pistonless compressor 13 and merge that be sent into steam total
Pipe；
Wherein, the liquid water of 32 bottoms of positive pressure vapour-liquid isolation packet, is flashed to micro-positive pressure along the direction A3-a2 by pressure reducing valve and changes
Hot-zone, the liquid water of 22 bottoms of micro-positive pressure vapour-liquid isolation packet, is flashed to negative pressure heat transfer zone along the direction A2-a1 by pressure reducing valve, bears
Pressure vapour-liquid isolation, which is wrapped, passes through circulating pump along the direction a3 after boiler feedwater of the liquid water of 12 bottoms behind the direction A1 and preheating converges
14 are transported to connecting line of the positive pressure between infiltration heat-exchanging tube bundle 31 and positive pressure vapour-liquid isolation packet 32；The online stream of boiler feedwater
Amount and the ratio of evaporation capacity are 1.8:1；
Boiler feedwater is from 5 continuous supplementation of water preheating section, and magnitude of recruitment is greater than liquid evaporation amount, evaporate remaining liquid water from
Cooling water extraction nozzle discharge of negative pressure vapour-liquid isolation 12 bottoms of packet along the direction A1.
4 fire coal boiler fume inlet condition table of table
The fire coal boiler fume finally flows through preheating section 5 and is further cooled to 75 DEG C, and recyclable steam total amount is not
Lower than 12300kg/h.
Cooling flue gas enters desulfurizer and carries out wet desulphurization, and flue gas after desulfurization enters purification eliminating white smoke unit, and purification disappears
White cigarette unit essential equipment (UEE) includes: spray tower 7, film demister 8 and flue gas reheater 9；7 internal upper part of spray tower setting therein
Cooling spraying device, lower part are equipped with tower tray；Space is connected to the gas side of film demister 8 in tower except cooling spraying device, film
Demister 8 is connected to chimney, and flue gas reheater 9 is arranged between film demister 8 and chimney import.
Cooling flue gas temperature after wet desulphurization is reduced to 45 DEG C, and flue gas after desulfurization enters in spray tower 7, mist cooling to 38
DEG C, the water spray 201m of spray tower 73/ h, sprays coolant-temperature gage by 19 DEG C and rises to 43 DEG C by 150~300 μm of mist droplet particle size；It is spraying
Flue gas enters removal entrainment water mist in film demister 8 afterwards, and film demister 8 is using 1000nm ceramic membrane, transmembrane pressure
0.03MPa；The low temperature saturated air that film demister 8 obtains is heated to 65 DEG C through flue gas reheater 9, and relative humidity is down to 27%,
It is discharged by chimney.
Although the present invention has been disclosed as above preferred embodiment, they can not be any as the restriction of the content of present invention
It is familiar with this technologists, without departing from the spirit and scope of the invention, from when that can make various changes and retouch, equally belongs to
In the protection scope of the present invention.
Claims (18)
1. the treatment process that a kind of flue gas depth receives heat and purification, which is characterized in that including waste heat recovery unit, desulfurization unit and
Purify three units of eliminating white smoke unit:
Flue gas obtains cooling flue gas by waste heat recovery unit, and cooling flue gas obtains flue gas after desulfurization after desulfurization unit, takes off
Flue gas enters smoke stack emission after purified eliminating white smoke unit again after sulphur；
Wherein waste heat recovery unit includes: heat transfer zone, circulating pump (14) and water preheating section (5)；The heat transfer zone includes that setting exists
Tube side in flue (6) is that the negative pressure of cooling water is wrapped from the negative pressure vapour-liquid isolation of heat-exchanging tube bundle (11) and flue (6) outside is infiltrated
(12), negative pressure Pistonless compressor (13) and cooling water supplement nozzle and extraction nozzle；
Cooling water enters tube side from water preheating section (5) bottom gathering tube in waste heat recovery unit, from water preheating section (5) after exchanging heat
Top outflow, enter back into heat transfer zone cooling water supplement nozzle, cooling water heat absorption vaporization forms steam, from negative pressure from infiltration change
After the tube side of heat pipe bundle (11) enters negative pressure vapour-liquid isolation packet (12) separation liquid water, it is pressurized by negative pressure Pistonless compressor (13)
Enter main steam range, the cooling water heat exchange circuit of the above composition afterwards；
Flue gas, which enters after flue (6), in waste heat recovery unit flows through the negative pressure of heat transfer zone from the shell for infiltrating heat-exchanging tube bundle (11)
Cooled down after journey, with cooling water heat exchange, finally flows through after water preheating section (5) is further cooled down and go desulfurization unit, the above composition
Flue gas heat exchange circuit.
2. the treatment process that flue gas depth according to claim 1 receives heat and purification, which is characterized in that in the heat transfer zone
Negative pressure from infiltrate heat-exchanging tube bundle (11) be isolated with negative pressure vapour-liquid packet (12) be connected to；Negative pressure vapour-liquid isolation packet (12) at the top of steam pipe with
The connection of negative pressure Pistonless compressor (13) entrance, negative pressure Pistonless compressor (13) outlet are connected to main steam range；The cooling water is mended
It fills nozzle setting and packet (12), negative pressure is isolated from the company for infiltrating heat-exchanging tube bundle (11) packet (12) being isolated with negative pressure vapour-liquid in negative pressure vapour-liquid
Adapter tube road, negative pressure from infiltrate in the gathering tube of heat-exchanging tube bundle (11) one at or a few place positions；
Negative pressure infiltrates heat-exchanging tube bundle (11) certainly, the steaming at (12) and negative pressure Pistonless compressor (13) entrance three is wrapped in the isolation of negative pressure vapour-liquid
Steam pressure is consistent, so that three constitutes the heat transfer zone of independent operating condition；Every grade of steam pressure difference when heat transfer zone is more than level-one, composition
The heat exchange process of plural serial stage.
3. the treatment process that flue gas depth according to claim 2 receives heat and purification, which is characterized in that the heat transfer zone
The heat exchange process of plural serial stage are as follows: the cooling water is the boiler feedwater that temperature is lower than 33 DEG C；The heat transfer zone includes that negative pressure is changed
Hot-zone, corresponding steam gauge pressure is between 0.06~0MPa of ﹣.
4. the treatment process that flue gas depth according to claim 3 receives heat and purification, which is characterized in that the heat transfer zone
The heat exchange process of plural serial stage are as follows: be included in front of negative pressure heat transfer zone and add micro-positive pressure heat transfer zone, corresponding steam gauge pressure between 0~
0.25MPa。
5. the treatment process that flue gas depth according to claim 4 receives heat and purification, which is characterized in that the heat transfer zone
The heat exchange process of plural serial stage are as follows: positive pressure heat transfer zone is set again before being included in micro-positive pressure heat transfer zone, and corresponding steam gauge pressure is higher than
0.25MPa。
6. the treatment process that flue gas depth according to claim 1 receives heat and purification, which is characterized in that cooling water exchanges heat back
Cooling water circulating pump (14) are set in road, the cooling water of liquid enters circulating pump (14) from the bottom that packet (11) is isolated in negative pressure vapour-liquid
Import, then converge after circulating pump (14) pressurization with the cooling water after preheating, send the cooling water to heat transfer zone to supplement nozzle.
7. the treatment process that flue gas depth according to claim 2 receives heat and purification, which is characterized in that the heat transfer zone
The heat exchange process of plural serial stage includes: the liquid water of maximum pressure vapour-liquid isolation packet bottom in the cooling water heat exchange circuit in heat transfer zone,
By pressure reducing valve step by step vacuum flashing to rear stage heat transfer zone；The liquid water of negative pressure heat transfer zone is by circulating pump (14) pressurization and in advance
Cooling water after heat converges, and is transported to the cooling water supplement nozzle of maximum pressure positive pressure heat transfer zone.
8. the treatment process that flue gas depth according to claim 2 receives heat and purification, which is characterized in that the heat transfer zone
The heat exchange process of plural serial stage includes: in cooling water heat exchange circuit, and the liquid water of low-pressure vapour-liquid isolation packet bottom passes through circulation
Pump pressurization is pressurized to previous stage heat transfer zone step by step；The liquid water of maximum pressure positive pressure heat transfer zone is flashed at least one by pressure reducing valve
The cooling water for locating lower pressure heat transfer zone supplements nozzle.
9. the treatment process that flue gas depth according to claim 2 receives heat and purification, which is characterized in that the heat transfer zone
The heat exchange process of plural serial stage includes: the steam stream at multi-stage heat exchanger area gas-liquid isolation packet top in cooling water heat exchange circuit
It is merged into higher stage compressor import to from the lower compressor outlet of pressure, is then delivered to main steam range.
10. the treatment process that flue gas depth according to claim 2 receives heat and purification, which is characterized in that the heat transfer zone
The heat exchange process of plural serial stage include: the steam at multi-stage heat exchanger area gas-liquid isolation packet top in cooling water heat exchange circuit
By Pistonless compressor directly by being transported to main steam range after compressor boost.
11. the treatment process that flue gas depth according to claim 6 receives heat and purification, which is characterized in that cooling water
The ratio of line circular flow and evaporation capacity is (1.01~3): 1.
12. the treatment process that flue gas depth according to claim 11 receives heat and purification, which is characterized in that cooling water
The ratio of line circular flow and evaporation capacity is (1.2~2): 1.
13. the treatment process that flue gas depth according to claim 1 receives heat and purification, which is characterized in that cooling water is from pre-
Hot arc continuous supplementation, and magnitude of recruitment is greater than evaporation capacity, evaporates remaining liquid water from cooling water extraction nozzle discharge.
14. the treatment process that flue gas depth according to claim 1 receives heat and purification, which is characterized in that the purification disappears
White cigarette unit includes sequentially connected spray tower (7), film demister (8) and flue gas reheater (9)；Spray tower (7) internal upper part
Cooling spraying device is set, and lower part is equipped with tower tray；Microporous hydrophilic membrane is set in film demister (8)；Microporous hydrophilic membrane is by film demisting
Device (8) is divided into the gas side of the film surface side of contact flue gas and does not contact the part of liquid side two of the reverse side of flue gas, gas side
By flue gas after spraying containing droplet, the setting of liquid side for importing the water for collecting droplet formation with water and extraction of infiltration film, and
The pressure of maintaining liquid side is lower than the pipeline opening of flue gas pressures；It is removed with film in space in spray tower (7) in addition to cooling spraying device
The connection of day with fog (8) gas side, film demister (8) gas side are connected to chimney, and flue gas is arranged again between film demister (8) and chimney import
Heater (9)；
Cooling water enters the cooling spraying device on spray tower (7) top, on tower tray of a part of cooling water through spray tower (7) lower part
It is discharged after collection, remaining cooling water, through being discharged by set pipeline opening, constitutes cooling water after film demister (8) liquid side is collected
Spraying receipts mist circuit；
Flue gas after desulfurization from desulfurization unit cools down and is washed in spray tower (7), then goes demisting through film demister (8) gas side
Drop and micro- foam etc. obtain low temperature saturated air, and low temperature saturated air is heated to be unsaturated flue gas through flue gas reheater (9), finally enters
Smoke stack emission constitutes the purification eliminating white smoke circuit of flue gas.
15. the treatment process that flue gas depth according to claim 14 receives heat and purification, which is characterized in that the spray tower
(7) top cooling spraying device uses industry cooling water spray, and the mist droplet particle size of generation is 20~400 μm, and the tower tray of bottom is
One or both of float valve tray and bubble cap tray, flue gas, which enters in the spray tower (7), first passes through bottom tray, then
With spraying counter current contacting.
16. the treatment process that flue gas depth according to claim 14 receives heat and purification, which is characterized in that described hydrophilic micro-
The aperture of pore membrane is 5~4000nm, and the planform of microporous hydrophilic membrane is one in tubulose, plate, honeycomb and doughnut
Kind is several, and the material of microporous hydrophilic membrane is the organic or inorganic material with water contact angle less than 75 °.
17. the treatment process that flue gas depth according to claim 14 receives heat and purification, which is characterized in that the flue gas is again
The heat source of heater (9) includes steam caused by front end waste heat recycles.
18. the treatment process that flue gas depth according to claim 14 receives heat and purification, which is characterized in that the flue gas is net
Change eliminating white smoke circuit, including film demister (8) setting is internal in spray tower (7), the two, which merges, becomes a single devices, film
Demister (8) is located at the top of cooling spraying device, setting buffering hydraulic barrier between film demister (8) and cooling spraying device
The water droplet that flue gas wraps up in band is isolated.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110327735A (en) * | 2019-08-12 | 2019-10-15 | 中石化炼化工程（集团）股份有限公司 | Desulfurization fume after-treatment device, method and wet desulfurization system |
| CN113559648A (en) * | 2020-11-21 | 2021-10-29 | 青岛道一空优科技有限公司 | Five dimension devices are optimized to air |
| EP4083402A4 (en) * | 2019-12-27 | 2024-02-21 | Mitsubishi Heavy Ind Ltd | Exhaust gas processing equipment and gas turbine plant |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102001635A (en) * | 2010-12-27 | 2011-04-06 | 上海化学试剂研究所 | Process for preparing ultrapure nitric acid |
| JP2015194306A (en) * | 2014-03-31 | 2015-11-05 | 株式会社クボタ | Incineration equipment and incineration method |
| CN106268198A (en) * | 2016-07-27 | 2017-01-04 | 山东大学 | A kind of desulfurization fume dehumidifying and water reclamation system and method |
| CN106940025A (en) * | 2017-04-12 | 2017-07-11 | 烟台盛海源节能科技有限公司 | Fire coal boiler fume is purified and waste heat recovery processing system and method |
| CN206479053U (en) * | 2017-02-08 | 2017-09-08 | 中冶华天工程技术有限公司 | A kind of heater for rolling steel waste heat recycling system |
| CN107542508A (en) * | 2017-08-07 | 2018-01-05 | 江苏科技大学 | A kind of light four combined production device of Ship Waste Heat cascade utilization formula cool and thermal power and method of work |
| CN107676805A (en) * | 2017-09-22 | 2018-02-09 | 华电电力科学研究院 | A kind of efficiently water intaking eliminating white smoke cooperation-removal pollutant device and its method of work |
| CN207146350U (en) * | 2017-07-14 | 2018-03-27 | 刘士刚 | A kind of residual heat from boiler fume recovery system |
| US20180221807A1 (en) * | 2017-02-04 | 2018-08-09 | Stanislav Sinatov | Method for Liquid Air Energy Storage with Fueled and Zero Carbon Emitting Power Output Augmentation |
-
2018
- 2018-10-31 CN CN201811283013.9A patent/CN109126364B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102001635A (en) * | 2010-12-27 | 2011-04-06 | 上海化学试剂研究所 | Process for preparing ultrapure nitric acid |
| JP2015194306A (en) * | 2014-03-31 | 2015-11-05 | 株式会社クボタ | Incineration equipment and incineration method |
| CN106268198A (en) * | 2016-07-27 | 2017-01-04 | 山东大学 | A kind of desulfurization fume dehumidifying and water reclamation system and method |
| US20180221807A1 (en) * | 2017-02-04 | 2018-08-09 | Stanislav Sinatov | Method for Liquid Air Energy Storage with Fueled and Zero Carbon Emitting Power Output Augmentation |
| CN206479053U (en) * | 2017-02-08 | 2017-09-08 | 中冶华天工程技术有限公司 | A kind of heater for rolling steel waste heat recycling system |
| CN106940025A (en) * | 2017-04-12 | 2017-07-11 | 烟台盛海源节能科技有限公司 | Fire coal boiler fume is purified and waste heat recovery processing system and method |
| CN207146350U (en) * | 2017-07-14 | 2018-03-27 | 刘士刚 | A kind of residual heat from boiler fume recovery system |
| CN107542508A (en) * | 2017-08-07 | 2018-01-05 | 江苏科技大学 | A kind of light four combined production device of Ship Waste Heat cascade utilization formula cool and thermal power and method of work |
| CN107676805A (en) * | 2017-09-22 | 2018-02-09 | 华电电力科学研究院 | A kind of efficiently water intaking eliminating white smoke cooperation-removal pollutant device and its method of work |
Non-Patent Citations (3)
| Title |
|---|
| 李锋等: "《疏导式热防护第一版》", 31 March 2017, 中国宇航出版社 * |
| 王志轩等: "《火电厂烟气脱硫装置运行检修岗位培训教材第一版》", 31 March 2013, 中国电力出版社 * |
| 闵桂荣: "《卫星热控制技术第一版》", 30 September 1991, 宇航出版社 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110327735A (en) * | 2019-08-12 | 2019-10-15 | 中石化炼化工程（集团）股份有限公司 | Desulfurization fume after-treatment device, method and wet desulfurization system |
| CN110327735B (en) * | 2019-08-12 | 2021-11-19 | 中石化炼化工程（集团）股份有限公司 | Desulfurization flue gas post-treatment device and method and wet desulfurization system |
| EP4083402A4 (en) * | 2019-12-27 | 2024-02-21 | Mitsubishi Heavy Ind Ltd | Exhaust gas processing equipment and gas turbine plant |
| CN113559648A (en) * | 2020-11-21 | 2021-10-29 | 青岛道一空优科技有限公司 | Five dimension devices are optimized to air |
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