CN107490191A - A kind of contact heat exchange type desulfurization and denitrification integral natural gas condensing boiler - Google Patents
A kind of contact heat exchange type desulfurization and denitrification integral natural gas condensing boiler Download PDFInfo
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- CN107490191A CN107490191A CN201710797869.7A CN201710797869A CN107490191A CN 107490191 A CN107490191 A CN 107490191A CN 201710797869 A CN201710797869 A CN 201710797869A CN 107490191 A CN107490191 A CN 107490191A
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 68
- 239000003345 natural gas Substances 0.000 title claims abstract description 34
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 22
- 230000023556 desulfurization Effects 0.000 title claims abstract description 22
- 239000007789 gas Substances 0.000 claims abstract description 94
- 239000003546 flue gas Substances 0.000 claims abstract description 87
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 84
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 79
- 238000009833 condensation Methods 0.000 claims abstract description 49
- 230000005494 condensation Effects 0.000 claims abstract description 49
- 239000007788 liquid Substances 0.000 claims abstract description 35
- 239000000779 smoke Substances 0.000 claims abstract description 33
- 230000002745 absorbent Effects 0.000 claims abstract description 32
- 239000002250 absorbent Substances 0.000 claims abstract description 32
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 26
- 239000002737 fuel gas Substances 0.000 claims abstract description 11
- 241000628997 Flos Species 0.000 claims description 10
- 235000019504 cigarettes Nutrition 0.000 claims description 6
- 239000007921 spray Substances 0.000 claims description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 230000003647 oxidation Effects 0.000 claims description 2
- 238000007254 oxidation reaction Methods 0.000 claims description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims 2
- 238000000034 method Methods 0.000 claims 1
- 239000007800 oxidant agent Substances 0.000 claims 1
- 239000012286 potassium permanganate Substances 0.000 claims 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 claims 1
- 239000003517 fume Substances 0.000 abstract description 4
- 238000010276 construction Methods 0.000 abstract 1
- 239000008400 supply water Substances 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 150000008065 acid anhydrides Chemical class 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000012670 alkaline solution Substances 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 238000013475 authorization Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000008246 gaseous mixture Substances 0.000 description 2
- 238000010792 warming Methods 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H8/00—Fluid heaters characterised by means for extracting latent heat from flue gases by means of condensation
- F24H8/003—Fluid heaters characterised by means for extracting latent heat from flue gases by means of condensation having means for moistening the combustion air with condensate from the combustion gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
-
- 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
- F23J15/006—Layout of treatment plant
-
- 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
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
- F23L15/04—Arrangements of recuperators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/0005—Details for water heaters
- F24H9/0036—Dispositions against condensation of combustion products
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
- F24H9/1832—Arrangement or mounting of combustion heating means, e.g. grates or burners
- F24H9/1836—Arrangement or mounting of combustion heating means, e.g. grates or burners using fluid fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C2202/00—Fluegas recirculation
- F23C2202/30—Premixing fluegas with combustion air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2215/00—Preventing emissions
- F23J2215/10—Nitrogen; Compounds thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2215/00—Preventing emissions
- F23J2215/20—Sulfur; Compounds thereof
-
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
-
- 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
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Treating Waste Gases (AREA)
- Chimneys And Flues (AREA)
Abstract
The invention discloses a kind of contact heat exchange type desulfurization and denitrification integral natural gas condensing boiler, including：The exhanst gas outlet of burner is connected with the smoke inlet of boiler body；Flue gas is connected to the delivery port of water- to-water heat exchanger with the water inlet of boiler body, and flue gas is connected to the smoke inlet of water- to-water heat exchanger with the exhanst gas outlet of boiler body；The smoke inlet of contact condensation gas cooler is connected by the first pipeline with exhanst gas outlet of the flue gas to water- to-water heat exchanger, and ozone is provided with the first pipeline and adds mouth, ozone adds mouth and is connected with ozone adding apparatus；The humid air outlet of contact air heater helps fuel gas inlet to be connected with burner, and the condensed absorbent liquid entrance of contact air heater is connected with the condensed absorbent liquid outlet of contact condensation gas cooler.The present invention desulphurization denitration natural gas condensing boiler, simple in construction, environment-friendly high-efficiency, investment cost is relatively low, and discharge fume in vapor latent heat utilization rate it is higher.
Description
Technical field
The invention belongs to natural gas boiler technical field, more particularly to a kind of contact heat exchange type desulfurization and denitrification integral is natural
Gas condensing boiler.
Background technology
Coal combustion can produce more pollutant, and large effect can be caused to environment, with people's environment in the last few years
The raising of the ecological awareness, the use of coal have become increasingly limited, and the use of the clean energy resource such as natural gas becomes more and more wider
It is general.After combustion of natural gas, more vapor is contained in flue gas, has a big chunk energy storage in vapor latent heat, led to
Phase-change heat-exchange is crossed, this portion of energy can be utilized.
As a kind of typical heat transmission equipment, condenser boiler energy-conserving and environment-protective, the main flow of natural gas boiler will be increasingly becoming.
For current condenser boiler in order to ensure exhaust gas temperature, most boilers do not carry out profit to the energy of flue gas reclaimed water vapor storage
With.
The patent of a kind of entitled " direct contact type gas fired-boiler flue gas total heat recovery system ", Authorization Notice No. are
CN202734021U, the system make use of absorption heat pump to reclaim the vapor latent heat in smoke evacuation, applied to heat supply network
Heating, but the system only make use of partial fume, and absorption heat pump involves great expense, it is complicated；A kind of entitled " one kind contact
The patent of formula condensing boiler ", Authorization Notice No. CN203797951U, the system pass through using the mode of indirect heat exchange
Second heating apparatus absorb the latent heat of vapor, there is provided the heat-exchange time that baffle plate extends flue gas, but are indirect heat exchange after all,
Heat exchange efficiency is not high enough, in addition heat transfer temperature difference it is small, it is necessary to heat exchange area it is larger；A kind of entitled " natural gas fume afterheat and cold
Condensate reclaims utilizes device with denitrification integral processing " patent application, application publication number CN103721538A, the device leads to
Cross flue gas to contact with the direct of shower water, vapor latent heat utilization rate greatly improves, and adds denitrification apparatus, environmental protection, but should
Device is also by way of indirect heat exchange, carries out heat utilization to the medium water for absorbing latent heat, heat transfer temperature difference is small, the thermal efficiency
It is low.
The content of the invention
It is an object of the invention to design a kind of contact heat exchange type desulfurization and denitrification integral natural gas condensing boiler, to solve
Complicated existing for existing natural gas condensing boiler, vapor latent heat utilization rate is low in costly and smoke evacuation asks
Topic.
In order to achieve the above object, the present invention is achieved using following technical scheme：
A kind of contact heat exchange type desulfurization and denitrification integral natural gas condensing boiler, including：Boiler body, the boiler body
On be provided with water inlet, hot water/steam (vapor) outlet, smoke inlet and exhanst gas outlet；Water inlet connects with hot water/steam (vapor) outlet；Combustion
Burner, the burner are provided with gas inlet, help fuel gas inlet and exhanst gas outlet, the exhanst gas outlet and pot of the burner
The smoke inlet of furnace body is connected；Flue gas is to water- to-water heat exchanger, and the flue gas is to being provided with water inlet, water outlet on water- to-water heat exchanger
Mouth, smoke inlet and exhanst gas outlet, the flue gas are connected to the delivery port of water- to-water heat exchanger with the water inlet of the boiler body,
The flue gas is connected to the smoke inlet of water- to-water heat exchanger with the exhanst gas outlet of the boiler body；Contact condensation flue gas cooling
Device, the contact, which condenses, is provided with exhaust opening, smoke inlet, the outlet of condensed absorbent liquid and water inlet, institute on gas cooler
The smoke inlet for stating contact condensation gas cooler passes through the first pipeline and exhanst gas outlet phase of the flue gas to water- to-water heat exchanger
Connection；Contact air heater, cool air inlet, humid air outlet, condensation are provided with the contact air heater
Absorbing liquid entrance, condensation-water drain and floss hole, humid air outlet and the burner of the contact air heater
Fuel gas inlet is helped to be connected, condensed absorbent liquid entrance and the contact condensation flue gas cooling of the contact air heater
The condensed absorbent liquid outlet of device is connected；The condensation-water drain of contact air heater and contact condensation gas cooler
Water inlet is connected.
Further, in addition to recirculation blower；Ozone is provided with first pipeline and adds mouth, the ozone adds
Mouth is connected with ozone adding apparatus；The ozone of first pipeline is additionally provided with exhanst gas outlet, the first pipeline before adding mouth
Exhanst gas outlet be connected with the air inlet of the recirculation blower, the outlet of the humid air of the contact air heater passes through
Second pipeline helps fuel gas inlet to be connected with the burner, and smoke inlet, the second pipe are additionally provided with second pipeline
The smoke inlet on road is connected with the air outlet of the recirculation blower.
Further, in addition to flue gas air heat exchanger；Wet air inlet, heat are provided with the flue gas air heat exchanger
Air outlet slit, smoke inlet and exhanst gas outlet, wet air inlet and the contact air heater of the flue gas air heat exchanger
Humid air outlet be connected, the hot air outlet of the flue gas air heat exchanger helps fuel gas inlet to be connected with the burner
Logical, the smoke inlet of the flue gas air heat exchanger is connected with the exhanst gas outlet of the boiler body, and the flue gas air changes
The exhanst gas outlet of hot device is connected with smoke inlet of the flue gas to water- to-water heat exchanger.
Further, nertralizer is additionally provided with the side wall of the contact air heater and adds mouth, the nertralizer
Mouth is added to be located between the condensed absorbent liquid entrance and floss hole of the contact air heater.
Further, the condensation-water drain of the contact air heater be located at floss hole and nertralizer add mouth it
Between.
Further, the contact condensation gas cooler overlays the surface of the contact air heater,
Set between the condensed absorbent liquid outlet of contact condensation gas cooler and the condensed absorbent liquid entrance of contact air heater
Adjusting control valve is equipped with, between the water inlet of contact condensation gas cooler and the condensation-water drain of contact air heater
It is provided with circulating pump.
Further, the contact condensation gas cooler and the contact air heater are placed side by side, contact
It is provided between the condensed absorbent liquid outlet of formula condensation gas cooler and the condensed absorbent liquid entrance of contact air heater
Circulating pump, it is provided with and follows between the water inlet of contact condensation gas cooler and the condensation-water drain of contact air heater
Ring pump.
Further, the contact is condensed to be provided with gas cooler and the contact air heater and is located at
The contact heat exchange element of its internal upper part；Contact heat exchange element is spray equipment or tower tray device.
Further, contact in the water inlet connection contact condensation gas cooler of contact condensation gas cooler
The entrance of heat exchange element；Contact is changed in the condensed absorbent liquid entrance connection contact air heater of contact air heater
The entrance of thermal element.
Further, the humid air outlet of the exhaust opening of contact condensation gas cooler and contact air heater is equal
Multi-cyclone demister is provided with, moisture is reduced and takes out of.
Compared with prior art, the invention has the advantages that：
The contact heat exchange type desulfurization and denitrification integral natural gas condensing boiler of the present invention, the interior supply water by preheating of boiler
After the high-temperature flue gas heating from burner, exportable hot water and steam；Burner can provide height by the natural gas that burns
Warm flue gas；Flue gas utilizes the latent heat in boiler emission flue gas in vapor to water- to-water heat exchanger, can supply water to boiler and carry out tentatively
Preheating, it is that the first step of vapor latent heat in flue gas is utilized herein；Ozone adding apparatus adds mouth to flue tube by ozone
Ozone is added in road, flue gas can be by NO in flue gas and SO after being mixed with ozone2Water-soluble acid anhydrides is oxidized to, acid anhydrides is contacting
Absorbed in formula condensation gas cooler by the aqueous solution, the thio-oxidizing discharge of nitrogen in flue gas can be reduced, reduce air pollution, contact
Flue gas can heat condensed absorbent liquid in condensation gas cooler, further utilize the latent heat in flue gas；Heated condensation is inhaled
Receiving liquid can be by the cold air preheating and humidifying of input in contact air heater；In addition, contact condensation gas cooler and
Contact air heater, using contact heat exchange mode, its heating surface area is smaller, and the coefficient of heat transfer is higher, can be further
Improve flue gas in vapor latent heat utilization rate, compared to absorption heat pump, equipment build of the invention is smaller, structure also compared with
Simply；The boiler vapor of the present invention can recycle, can saving water resource, boiler can be used for water-deficient area, the row of reducing
Put NO and SO in flue gas2Content, combined cycle field can be expanded to, energy-saving and emission-reduction and haze are administered, have it is very high should
With value.
Further, recirculation blower can extract partial fume, after the humidification with carrying out self-contact type air heater heats
Air mixing, the air after warming and humidifying can further be heated, heated humid air mixes laggard with natural gas again
High-temperature flue gas can be generated by entering burner combustion, and high-temperature flue gas is delivered to boiler and can heat the water in boiler.
Further, boiler emission flue gas flue gas air heat exchanger can future self-contact type air heater humid air
Further heating, the utilization rate of vapor latent heat in flue gas can be improved.
Further, mouth is added by nertralizer and adds nertralizer, the acidic materials in condensed absorbent liquid can neutralized, can
Prevent the exhaust emission environment of condensed absorbent liquid.
Further, after the heat exchange of condensed absorbent liquid and cold air, and after being neutralized agent processing, contact condensation can be delivered to
Gas cooler is recycled, can saving water resource.
Further, contact heat exchange element is spray equipment or tower tray device, can improve heat exchange efficiency.
Further, the humid air outlet of the exhaust opening of contact condensation gas cooler and contact air heater is set
The multi-cyclone demister put, flue gas can be reduced and take moisture out of.
Brief description of the drawings
Fig. 1 is a kind of structure of embodiment of the contact heat exchange type desulfurization and denitrification integral natural gas condensing boiler of the present invention
Schematic diagram；
Fig. 2 is the knot of another embodiment of the contact heat exchange type desulfurization and denitrification integral natural gas condensing boiler of the present invention
Structure schematic diagram.
In Fig. 1 into Fig. 2：1 boiler body；2 burners；3 recirculation blowers；4 flue gases are to water- to-water heat exchanger；5 contacts are cold
Solidifying gas cooler；6 cool air inlets；7 nertralizers add mouth；8 floss holes；9 circulating pumps；10 adjusting control valves；11 contacts
Heat exchange element；12 contact air heaters；13 ozone adding apparatus；14 flue gas air heat exchangers.
Embodiment
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
With reference to figure 1, a kind of embodiment of contact heat exchange type desulfurization and denitrification integral natural gas condensing boiler of the invention, bag
Include：Boiler body 1, burner 2, flue gas are to water- to-water heat exchanger 4, contact condensation gas cooler 5 and contact air heater
12。
The smoke inlet of boiler body 1 is connected with the exhanst gas outlet of burner 2, delivery port of the flue gas to water- to-water heat exchanger 4
It is connected with the water inlet of boiler body 1, flue gas is connected to the smoke inlet of water- to-water heat exchanger 4 with the exhanst gas outlet of boiler body 1
It is logical；The smoke inlet of contact condensation gas cooler 5 is connected by the first pipeline with exhanst gas outlet of the flue gas to water- to-water heat exchanger 4
Logical, the ozone on the first pipeline adds mouth and is connected with ozone adding apparatus 13, and the first pipeline is set before ozone adds mouth
There is exhanst gas outlet, the exhanst gas outlet of the first pipeline is connected with the air inlet of recirculation blower 3；Contact air heater 12
Humid air outlet helps fuel gas inlet to be connected by the second pipeline and burner 2, and smoke inlet is provided with the second pipeline, the
The smoke inlet of two pipelines is connected with the air outlet of recirculation blower 3, and the condensed absorbent liquid of contact air heater 12 enters
Mouth is connected with the condensed absorbent liquid outlet of contact condensation gas cooler 5；In the side wall of contact air heater 12 also
It is provided with nertralizer and adds mouth 7, nertralizer selects alkaline solution；Nertralizer adds mouth 7 and is located at the contact air heater
Between the floss hole 8 of 12 upper port and the contact air heater 12；Set in the side wall of contact air heater 12
Condensation-water drain is equipped with, condensation-water drain is located at the floss hole 8 of contact air heater 12 and nertralizer is added between mouth 7,
Condensation-water drain is connected with the water inlet of contact condensation gas cooler 5；Contact condensation gas cooler 5, which overlays, to be connect
The surface of touch air heater 12, the condensed absorbent liquid outlet of contact condensation gas cooler 5 add with contact air
Adjusting control valve 10 is provided between the condensed absorbent liquid entrance of hot device 12；Contact condensation gas cooler 5 water inlet with
Circulating pump 9 is provided between the condensation-water drain of contact air heater 12；Contact condenses gas cooler 5 and contact
Contact heat exchange element 11 is provided with air heater 12, contact heat exchange element 11 is spray equipment or column plate dress
Put；The humid air outlet of the exhaust opening and contact air heater 12 of contact condensation gas cooler 5 is provided with multitube
Cyclone demister.
The course of work of above-described embodiment is：Cigarette of the high-temperature flue gas through burner 2 caused by combustion of natural gas in burner 2
Gas outlet export, smoke inlet of the high-temperature flue gas through boiler body 1 enter in boiler body 1, and flue gas will supply to water- to-water heat exchanger 4
It is sent into after water preheating in boiler body 1, the supply water heat temperature raising after the preheating in boiler body 1 is generated steam by high-temperature flue gas
Or hot water output；High-temperature flue gas is discharged after being exchanged heat in boiler body 1 with supply water by the exhanst gas outlet of boiler body 1, and
Enter flue gas by pipeline to preheat boiler supply water in water- to-water heat exchanger 4, after flue gas and supply water heat exchange, from cigarette
Gas is discharged to the exhanst gas outlet of water- to-water heat exchanger 4, and is condensed by the first Pipeline transport to contact in gas cooler；Ozone adds
Enter device 13 ozone is added in the first pipeline by ozone addition mouth, ozone mixes with flue gas in the first pipeline；Follow again
Ring blower fan 3 is extracted after the flue gas after part is handled by ozone mixed with carrying out the humidified hot air of self-contact type air heater 12,
With entering the burning generation high-temperature flue gas of burner 2 together with natural gas, the gaseous mixture of remaining ozone and flue gas is cold into contact
Solidifying gas cooler 5, gaseous mixture are sent out in contact condenses gas cooler 5 with the recirculated water that contact heat exchange element 11 sprays
Discharged after raw contact heat-exchanging, circulation vector water is heated；NO and SO in flue gas2By ozone oxidation into water-soluble acid anhydrides,
Acid anhydrides is absorbed in contact condensation gas cooler 5 by the aqueous solution；The condensation generated in contact condensation gas cooler 5 is inhaled
Receive liquid and contact air heater 12 is entered by adjusting control valve 10, contact air heater will be passed through by contact heat-exchanging
12 cold air warming and humidifying, condensed absorbent liquid and the Na that the addition of mouth 7 is added from nertralizer2CO3After being neutralized Deng alkaline solution
Divide two parts, a part returns to contact condensation gas cooler 5 through circulating pump 9, and unnecessary partial coagulation water passes through floss hole 8
Drain valve discharge boiler.
With reference to figure 2, another embodiment of contact heat exchange type desulfurization and denitrification integral natural gas condensing boiler of the invention,
Difference with a upper embodiment is：Also include flue gas air heat exchanger 14, eliminate the reduced air in one embodiment
Machine 3.The wet air inlet of flue gas air heat exchanger 14 is connected with the humid air outlet of contact air heater 12, and flue gas is empty
The hot air outlet of gas heat exchanger 14 helps fuel gas inlet to be connected with burner 2, the smoke inlet of flue gas air heat exchanger 14
It is connected with the exhanst gas outlet of the boiler body 1, exhanst gas outlet and the flue gas of the flue gas air heat exchanger 14 feed water
The smoke inlet of heat exchanger 4 is connected.
The course of work of above-described embodiment is：
The flue gas that boiler body 1 discharges enters flue gas air heat exchanger 14, carrys out the humidification of self-contact type air heater 12
After hot-air is heated again when flue gas air heat exchanger 14 by flue gas, it is high to be mixed into the burning generation of burner 2 with natural gas
Warm flue gas, the flue gas after the heat exchange of flue gas air heat exchanger 14 enter flue gas to water- to-water heat exchanger 4, boiler feedwater are preheated.
Another embodiment of the contact heat exchange type desulfurization and denitrification integral natural gas condensing boiler of the present invention, contact are cold
Solidifying gas cooler 5 and contact air heater 12 are placed side by side, and the condensed absorbent liquid of contact condensation gas cooler 5 goes out
Circulating pump, contact condensation gas cooler 5 are provided between mouth and the condensed absorbent liquid entrance of contact air heater 12
Water inlet and contact air heater 12 condensation-water drain between be provided with circulating pump.
Claims (10)
- A kind of 1. contact heat exchange type desulfurization and denitrification integral natural gas condensing boiler, it is characterised in that including：Boiler body (1), water inlet, hot water/steam (vapor) outlet, smoke inlet and flue gas are provided with the boiler body (1) and is gone out Mouthful；Burner (2), the burner (2) are provided with gas inlet, help fuel gas inlet and exhanst gas outlet, the burner (2) exhanst gas outlet is connected with the smoke inlet of boiler body；Flue gas gives water- to-water heat exchanger (4), and the flue gas on water- to-water heat exchanger (4) to being provided with water inlet, delivery port, smoke inlet and cigarette Gas exports, and the flue gas is connected to the delivery port of water- to-water heat exchanger (4) with the water inlet of the boiler body (1), the flue gas Smoke inlet to water- to-water heat exchanger (4) is connected with the exhanst gas outlet of the boiler body (1)；Contact condensation gas cooler (5), the contact condenses and is provided with exhaust opening on gas cooler (5), flue gas enters Mouthful, the outlet of condensed absorbent liquid and water inlet, the smoke inlet of contact condensation gas cooler (5) by the first pipeline with The flue gas is connected to the exhanst gas outlet of water- to-water heat exchanger (4)；Contact air heater (12), cool air inlet (6), humid air are provided with the contact air heater (12) Outlet, condensed absorbent liquid entrance, condensation-water drain and floss hole (8), the humid air of the contact air heater (12) go out Mouth helps fuel gas inlet to be connected with the burner (2), the condensed absorbent liquid entrance of the contact air heater (12) It is connected with the condensed absorbent liquid outlet of contact condensation gas cooler (5)；Contact air heater (12) it is cold Condensate exports to be connected with the water inlet of contact condensation gas cooler (5).
- 2. contact heat exchange type desulfurization and denitrification integral natural gas condensing boiler according to claim 1, it is characterised in that also Including recirculation blower (3)；Ozone is provided with first pipeline and adds mouth, the ozone adds mouth and ozone adding apparatus (13) it is connected；The ozone of first pipeline is additionally provided with exhanst gas outlet before adding mouth, the exhanst gas outlet of the first pipeline with The air inlet of the recirculation blower (3) is connected, and the humid air outlet of the contact air heater (12) passes through second Pipeline helps fuel gas inlet to be connected with the burner (2), and smoke inlet, the second pipeline are additionally provided with second pipeline Smoke inlet be connected with the air outlet of the recirculation blower (3).
- 3. contact heat exchange type desulfurization and denitrification integral natural gas condensing boiler according to claim 1, it is characterised in that also Including flue gas air heat exchanger (14)；Wet air inlet, hot air outlet, cigarette are provided with the flue gas air heat exchanger (14) Gas entrance and exhanst gas outlet, the wet air inlet of the flue gas air heat exchanger (14) are wet with contact air heater (12) Air outlet slit is connected, and the hot air outlet of the flue gas air heat exchanger (14) helps fuel gas inlet with the burner (2) It is connected, the smoke inlet of the flue gas air heat exchanger (14) is connected with the exhanst gas outlet of the boiler body (1), described The exhanst gas outlet of flue gas air heat exchanger (14) is connected with smoke inlet of the flue gas to water- to-water heat exchanger (4).
- 4. contact heat exchange type desulfurization and denitrification integral natural gas condensing boiler according to claim 1, it is characterised in that institute State and nertralizer addition mouth (7) is additionally provided with the side wall of contact air heater (12), the nertralizer adds mouth (7) and is located at Between the condensed absorbent liquid entrance and floss hole (8) of the contact air heater (12).
- 5. contact heat exchange type desulfurization and denitrification integral natural gas condensing boiler according to claim 4, it is characterised in that institute The condensation-water drain for stating contact air heater (12) is located between floss hole (8) and nertralizer addition mouth (7).
- 6. contact heat exchange type desulfurization and denitrification integral natural gas condensing boiler according to claim 1, it is characterised in that de- Nitre can also add other oxidants such as hydrogen peroxide, potassium permanganate by dosing mouth (7), with reference to the ozone of addition, realize to cigarette Oxidation processes in gas in nitrogen, oxysulfide.
- 7. contact heat exchange type desulfurization and denitrification integral natural gas condensing boiler according to claim 1, it is characterised in that institute State the surface that contact condensation gas cooler (5) overlays the contact air heater (12), contact condensation cigarette Tune is provided between the condensed absorbent liquid outlet of Gas Cooler (5) and the condensed absorbent liquid entrance of contact air heater (12) Control valve (10) is saved, the condensed water of the water inlet and contact air heater (12) of contact condensation gas cooler (5) goes out Circulating pump (9) is provided between mouthful.
- 8. contact heat exchange type desulfurization and denitrification integral natural gas condensing boiler according to claim 1, it is characterised in that institute State contact condensation gas cooler (5) and the contact air heater (12) is placed side by side, contact condensation flue gas is cold But it is provided with circulation between the condensed absorbent liquid outlet of device (5) and the condensed absorbent liquid entrance of contact air heater (12) Pump, circulation is provided between the water inlet of contact condensation gas cooler and the condensation-water drain of contact air heater Pump.
- 9. contact heat exchange type desulfurization and denitrification integral natural gas condensing boiler according to claim 1, it is characterised in that institute State in contact condensation gas cooler (5) and the contact air heater (12) and be provided with connecing positioned at its internal upper part Touch heat exchange element (11)；Contact heat exchange element (11) is spray equipment or tower tray device.
- 10. contact heat exchange type desulfurization and denitrification integral natural gas condensing boiler according to claim 8, it is characterised in that Water inlet connection contact condensation gas cooler (5) interior contact heat exchange element of contact condensation gas cooler (5) (11) entrance；Contacted in the condensed absorbent liquid entrance connection contact air heater (12) of contact air heater (12) The entrance of formula heat exchange element (11).
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| CN201710797869.7A CN107490191A (en) | 2017-09-06 | 2017-09-06 | A kind of contact heat exchange type desulfurization and denitrification integral natural gas condensing boiler |
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| CN201710797869.7A CN107490191A (en) | 2017-09-06 | 2017-09-06 | A kind of contact heat exchange type desulfurization and denitrification integral natural gas condensing boiler |
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| CN108613173A (en) * | 2018-06-05 | 2018-10-02 | 郑州大学 | Gas fired-boiler flue gas recirculation humidifies low nitrogen system |
| CN109210955A (en) * | 2018-10-19 | 2019-01-15 | 上海孚旺炉业有限公司 | A kind of industrial furnace low-temperature flue gas waste heat utilizes and desulfurization nitre eliminating white smoke integral system |
| CN110594777A (en) * | 2019-09-26 | 2019-12-20 | 中国电建集团河南工程有限公司 | Steam supply system of air heater of boiler air preheater |
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Application publication date: 20171219 |