CN106500120A - The low nitrogen of one kind preheating humidification and flue gas depth residual neat recovering system - Google Patents
The low nitrogen of one kind preheating humidification and flue gas depth residual neat recovering system Download PDFInfo
- Publication number
- CN106500120A CN106500120A CN201610885903.1A CN201610885903A CN106500120A CN 106500120 A CN106500120 A CN 106500120A CN 201610885903 A CN201610885903 A CN 201610885903A CN 106500120 A CN106500120 A CN 106500120A
- Authority
- CN
- China
- Prior art keywords
- heat recovery
- gas
- recovery device
- hot water
- flue gas
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—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
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Treating Waste Gases (AREA)
- Chimneys And Flues (AREA)
Abstract
Low nitrogen and flue gas depth residual neat recovering system it relates to a kind of preheating is humidified, the system include preheating humidifying device, burner, depth waste-heat recovery device, demister and EGR etc..Disclosure system is by air and the humidification of flue gas recycled, reducing the discharge of nitrogen oxides, can reduce the consumption of flue gas recycled in the case of reaching same discharged nitrous oxides；By to air and the preheating of flue gas recycled, the water capacity in gaseous mixture can be increased；The exhaust gas volumn in burner hearth is caused to increase due to the addition of flue gas recycled so that depth waste-heat recovery device can absorb more heats；Complete to circulate by cold water of the hot water of depth waste-heat recovery device with preheating humidifying device, solve the problems, such as that low-grade heat cannot be used, and the moisture that the vapor due to the condensation of depth waste-heat recovery device is consumed with the water ancillary equipment that demister is reclaimed, it is not necessary in addition supplement water.
Description
Technical field
It relates to a kind of low nitrogen energy conserving system, specifically, is related to more than a kind of low nitrogen of preheating humidification and flue gas depth
Heat recovery system.
Background technology
Natural gas is increasingly taken seriously as a kind of clean fuel, but the nitrogen oxides produced in its combustion process are
Important pollutant in air, nitrogen oxides not only form acid rain, can also form haze and photochemical fog, and environment is produced very
Big harm.
During combustion of natural gas, temperature is the principal element for affecting NO_x formation, by reducing ignition temperature, can
To greatly reduce discharged nitrous oxides.Flue gas recirculation can realize the reduction of ignition temperature, by by the combustion product of flue gas
Be added in combustion zone, reduce ignition temperature, the flue gas being simultaneously introduced reduces the partial pressure of oxygen, this will weaken oxygen with
Nitrogen generates the process of thermal NO x, so as to reduce the generation of NOx.Same to reduce combustion zone temperature to flame zone water filling
Sample can play a part of to suppress NOx to generate, and one is to add vapor to reduce highest flame temperature so that thermal NO is significantly
Decline；Two is in the case of flame peak temperature identical, adds vapor that the concentration of OH groups in flame is increased, although
The concentration of OH increases so that thermal NO has increased slightly, but humidification result in the decline of CH base concentration so that HCN and N components
Concentration substantially reduce so that Quick-type NO greatly reduces.The discharge that above-mentioned two reason causes the NO of combustion process total is
Reduce.Other technologies include fractional combustion (including air classification, fuel staging), lean fuel premixed combustion, flue gas recirculation, nonflame
The modes such as burning, swirl flow combustion.
Low-NO_x combustion technology can bring some problems, such as flue gas recirculation amount to cross conference generation in actual moving process
Combustion instability problem, if running air temperature is too low, can produce condensed water.Using modes such as water sprays so that cigarette
In gas, water capacity increases, and increased heat loss due to exhaust gas, reduces boiler efficiency.
In gas fired-boiler flue gas, typically in 15-18%, the latent heat which contains is about the 10- of natural gas Lower heat value to water capacity
11%, it is important directions of the fume afterheat using technology development.When flue-gas temperature is less than its dew point temperature (typically in 55-57
DEG C or so), start to discharge condensation heat in flue gas, thus develop dividing wall type flue gas condenser.But as technique takes
Indirect heat exchange, when the flue gas for closing on Water in Condenser side wall is less than its dew point temperature, starts to produce condensation.Dividing wall type flue gas is cold
Condenser carries out fume afterheat utilization using system return as low temperature cold source and is widely used at present.Due to dividing wall type condenser
Heat recovery efficiency is relatively low, and research worker develops absorption direct-cooled condenser, using spray column using low-temperature circulating water and flue gas
Directly contact, the Latent heat of the device absorbable more than 90%, but due to circulating water temperature low, it is impossible to be used effectively, send out
Exhibition thus stagnate.
Content of the invention
For the problems referred to above, the disclosure proposes a kind of low nitrogen of preheating humidification and flue gas depth residual neat recovering system, this system
Can be combined with boiler as auxiliary equipment, discharged nitrous oxides can not only be substantially reduced, additionally it is possible in by recovered flue gas
Vapor and its heat, greatly improve boiler efficiency.
A kind of low nitrogen of preheating humidification and flue gas depth residual neat recovering system, wherein, the system include preheating humidifying device,
Burner, depth waste-heat recovery device, demister and EGR；Wherein：The preheating humidifying device is using warm
The first gaseous mixture entered in which is carried out preheating humidification and obtains the second gaseous mixture and cold water by water, its gas outlet and burner
Gas access be connected, its cooling water outlet is connected with the cold water inlet of depth waste-heat recovery device by circulating chilled water pipeline；Institute
The gaseous mixture of the flue gas that the first gaseous mixture is sent back to is stated for air and EGR；The burner is by the second mixture combustion
The 3rd gaseous mixture is produced, its gas outlet is connected with the gas access of depth waste-heat recovery device；The depth waste heat recovery dress
Put the water condensation in the 3rd gaseous mixture, obtain the 4th gaseous mixture and hot water, the gas access of its gas outlet and demister
It is connected, its hot water outlet is connected with the hot water inlet of preheating humidifying device by hot water circuit pipeline；The demister is by
Water condensation in three gaseous mixtures, obtains flue gas and the hot water for discharging, its gas outlet entrance simultaneously with extraneous, EGR
It is connected, its hot water outlet is connected with hot water circuit pipeline.
Further, the system also includes the pressurizer for providing flue gas recirculation pressure in whole system, the supercharging
The gas outlet of device is connected with the gas access of preheating humidifying device, or the pressurizer is located at the preheating humidification dress
Between the gas outlet that puts and the entrance of burner.
Further, between 30-60 DEG C, water capacity is between 10-15% for the temperature of second mixed gas.
Further, the circulating chilled water pipeline provides pressure by first circulation pump；The hot water circuit pipeline is by second
Circulating pump provides pressure.
Further, the depth waste-heat recovery device is N1, and N1 is the integer more than 1；Wherein：
1st gas access of depth waste-heat recovery device is connected with the gas outlet of burner, the 1st depth waste heat
The hot water outlet of retracting device is connected with the hot water inlet of preheating humidifying device by hot water circuit pipeline；
The gas access of i-th depth waste-heat recovery device and gas outlet's phase of the I-1 depth waste-heat recovery device
Even；The gas outlet of i-th depth waste-heat recovery device is connected with the gas access of the I+1 depth waste-heat recovery device；I
The cold water inlet of individual depth waste heat apparatus for recovering is connected with the hot water outlet of the I+1 depth waste-heat recovery device；I-th depth
The hot water outlet of degree waste-heat recovery device is connected with the cold water inlet of the I-1 depth waste-heat recovery device；Wherein, I is integer,
1 ＜ I ＜ N1；
The gas outlet of the N1 depth waste-heat recovery device is connected with the gas access of demister；More than the N1 depth
The cold water inlet of heat reclamation device is connected with the cooling water outlet of preheating humidifying device by circulating chilled water pipeline.
Further, the demister is N2, and N2 is the integer more than 1；Wherein：
The gas outlet of the 1st demister is connected with the gas access of the 2nd demister；
The gas outlet of j-th demister is connected with the gas access of J+1 demister；Wherein, J is integer, 1
＜ J ＜ N2；
The gas outlet of N2 demister is connected with the gas access of extraneous, EGR simultaneously；Each demisting
The hot water outlet of device is connected with hot water circuit pipeline.
Preferably, the EGR includes circulating fan, and the circulating fan is used for accelerating flue gas to flow in the duct
Dynamic.
Preferably, the depth waste-heat recovery device is spray column or packed tower.
Preferably, the demister includes screen type, flat.
Preferably, the pressurizer includes blower fan.
Disclosure system has following beneficial effects：
(1) by air and the humidification of flue gas recycled, the discharge of nitrogen oxides can be reduced, same nitrogen oxidation is reached
Thing can reduce the consumption of flue gas recycled in the case of discharging；
(2) by air and the preheating of flue gas recycled, the water capacity in gaseous mixture can be increased；
(3) addition of flue gas recycled causes the exhaust gas volumn in burner hearth to increase so that depth waste-heat recovery device can absorb
More heats；
(4) hot water of depth waste-heat recovery device is completed to circulate with the cold water of preheating humidifying device, solves low-grade heat
The problem that cannot be used.
(5) moisture that the water of depth waste-heat recovery device condensation is consumed with the water ancillary equipment that demister is reclaimed, is not required to
In addition water to be supplemented.
Description of the drawings
Preheating in Fig. 1 disclosure one embodiment is humidified low nitrogen and flue gas depth waste-heat recovery device schematic diagram；
In figure：1st, blower fan；2nd, humidifying device is preheated；3rd, combustion head；4th, boiler 5, depth waste-heat recovery device；6th, demisting
Device；7th, first circulation pump；8th, second circulation pump；9th, circulating fan；10th, circulating chilled water pipeline；11st, hot water circuit pipeline；Q1, sky
Gas；Q2, the gaseous mixture of cold drying hypoxia；The gaseous mixture of the high water capacity hypoxia of q3, high temperature；Flue gas after q4, burning；Q5, height
The flue gas of humidity low temperature；Q6, the flue gas of cold drying；Q7, arrange flue gas to air；Q8, flue gas recycled；W1, cold water；
W2, hot water；W3, demister recycle-water；
Multiple depth waste-heat recovery device connection diagrams in Fig. 2 disclosure one embodiment；
In figure：5-1, the first depth waste-heat recovery device；5-2, the second depth waste-heat recovery device；More than 5-3, the 3rd depth
Heat reclamation device；W1, the cold water from preheating humidifying device；W2-1, hot water；W2-2, hot water；W2, go to preheating humidifying device
Hot water；Flue gas after q4, burning；Q5-1, flue gas；Q5-2, flue gas；Q5, the flue gas for leading to demister；
Multiple demister connection diagrams in Fig. 3 disclosure one embodiment；
In figure：6-1, the first demister；6-2, the second demister；6-3, the 3rd demister；Q5, from its phase
The flue gas of depth waste-heat recovery device even；Q5-1, through the first demister flue gas；Q5-2, through the second demister
Flue gas；Q6, through the 3rd demister flue gas；W3-1, the first demister recycle-water, the second demisters of w3-2 are reclaimed
Water, the 3rd demister recycle-waters of w3-3；11st, hot water circuit pipeline.
Specific embodiment
In one embodiment, a kind of low nitrogen of preheating humidification and flue gas depth residual neat recovering system, the system are disclosed
Including preheating humidifying device, burner, depth waste-heat recovery device, demister and EGR；Wherein：Described pre-
The first gaseous mixture entered in which is carried out preheating humidification using hot water and obtains the second gaseous mixture and cold water by hot humidifying device, its gas
Body outlet is connected with the gas access of burner, and its cooling water outlet is connected with the cold water inlet of depth waste-heat recovery device；Institute
The gaseous mixture of the flue gas that the first gaseous mixture is sent back to is stated for air and EGR；The burner is by the second mixture combustion
The 3rd gaseous mixture is produced, its gas outlet is connected with the gas access of depth waste-heat recovery device；The depth waste heat recovery dress
Put the water condensation in the 3rd gaseous mixture, obtain the 4th gaseous mixture and hot water, the gas access of its gas outlet and demister
It is connected, its hot water outlet is connected with the hot water inlet of preheating humidifying device；The demister is by the water-cooled in the 3rd gaseous mixture
Solidifying, flue gas and the hot water for discharging is obtained, its gas outlet is connected with the entrance of extraneous, EGR simultaneously, its hot water outlet
It is connected with hot water circuit pipeline.
In this embodiment, preheating humidifying device can reduce nitrogen oxides by the humidification to flue gas recycled
Discharge, can reduce the consumption of flue gas recycled, to air and flue gas recycled in the case of reaching same discharged nitrous oxides
Preheating, the water capacity in gaseous mixture can be increased.Partial fume is looped back by EGR, is mixed with air, is increased
Exhaust gas volumn in burner so that depth waste-heat recovery device can absorb more heats.And depth waste-heat recovery device
Hot water with preheating humidifying device in cold water complete to circulate, solve the problems, such as that low-grade heat cannot be used.Simultaneously as deep
The moisture that the vapor of degree waste-heat recovery device condensation is consumed with the water ancillary equipment that demister is reclaimed, it is not necessary in addition supplement
Water.
In this embodiment, the characteristics of the first gaseous mixture is the mixing of air and flue gas recycled, the gaseous mixture is low
Oxygen concentration, drying.First gaseous mixture enters preheating humidifying device, inside preheating humidifying device carries out heat and mass using hot water
Complete to preheat humidification process, the second mixture temperature obtained after preheating reaches 30-60 DEG C, and water capacity reaches 10-15%, has
The characteristics of high water capacity low oxygen concentration.Preferably, the depth waste-heat recovery device is spray column or packed tower so that in flue gas
Water more than 90% is condensed so that flue-gas temperature is reduced to 40-50 DEG C, and the water capacity in flue gas is reduced to less than 2%.Deep
The cold water used by degree waste-heat recovery device is to preheat the cold water that humidifying device is produced, the hot water that depth waste-heat recovery device is produced
Enter preheating humidifying device.
Second gaseous mixture enters burner hearth by the combustion head of burner, is burnt with natural gas, reach in burner hearth
Reduce ignition temperature, reduce the purpose of discharged nitrous oxides, natural gas here can also be other combustible gas.Burned
Flue gas afterwards is the 3rd gaseous mixture, enters depth waste-heat recovery device, makes the water condensation in flue gas get off by modes such as sprays,
Flue gas is changed into the 4th gaseous mixture of high humility low temperature.4th gaseous mixture is changed into the flue gas for drying low temperature by demister, extremely
This obtains the flue gas that can be discharged into ambient atmosphere.Preferably, the demister includes screen type, flat.
The nitrogen oxides that 4th gaseous mixture contains have been substantially reduced, in order to further reduce the discharge of nitrogen oxides, part
The flue gas for drying low temperature enters flue gas recycled device portal, loops back at air intake through pipeline, mixes with air.It is preferred that
Ground, the EGR include circulating fan, accelerate flue gas to flow in the duct.For not affecting to burn, while reduce nitrogen again
The discharge of oxide, it is preferable that the 5-15% of the dry flue gas after by demister is sent back to blower fan and mixed with air.
In one embodiment, in order to keep the pressure of whole system, with the resistance for overcoming equipment to bring to flue gas, described
System also includes that the pressurizer for providing flue gas recirculation pressure in whole system, the gas outlet of the pressurizer are increased with preheating
The gas access of wet device is connected.At the air intake in pressurizer, air is mixed with flue gas recycled, obtains
One gaseous mixture.Preferably, the pressurizer includes blower fan.
System construction drawing including blower fan is as shown in figure 1, in figure：1st, blower fan；2nd, humidifying device is preheated；3rd, combustion head；4、
Boiler 5, depth waste-heat recovery device；6th, demister；7th, first circulation pump；8th, second circulation pump；9th, circulating fan；10th, cold water
Circulating line；11st, hot water circuit pipeline；Q1, air；Q2, the gaseous mixture of cold drying hypoxia；The high water capacity hypoxia of q3, high temperature
Gaseous mixture；Flue gas after q4, burning；Q5, the flue gas of high humility low temperature；Q6, the flue gas of cold drying；Q7, arrange to air
Flue gas；Q8, flue gas recycled；W1, cold water；W2, hot water；W3, demister recycle-water.
In another embodiment, there is supercharging between the gas outlet of the preheating humidifying device and the entrance of burner
Device, the pressurizer are used for providing flue gas recirculation pressure in whole system.Under this system structure, air and recirculation
Flue gas mixes at the gas access of preheating humidifying device, obtains the first gaseous mixture.Preferably, the pressurizer includes wind
Machine.
In one embodiment, the circulating chilled water pipeline provides pressure by first circulation pump；The hot water circuit pipeline
Pressure is provided by second circulation pump.The cold water that the preheating humidifying device is produced enters depth waste heat recovery dress through first circulation pump
Put；The hot water that the depth waste-heat recovery device is produced enters preheating humidifying device through second circulation pump.By first circulation pump
With the effect of second circulation pump, effectively facilitate pre-cooling hot water and followed between preheating humidifying device and depth waste-heat recovery device
Ring, solves the problems, such as that low-grade heat cannot be used.
In one embodiment, it is more fully to reclaim the waste heat and vapor in the 3rd gaseous mixture, the depth waste heat is returned
Receiving apparatus are N1, and N1 is the integer more than 1；Wherein：
1st gas access of depth waste-heat recovery device is connected with the gas outlet of burner, the 1st depth waste heat
The hot water outlet of retracting device is connected with the hot water inlet of preheating humidifying device by hot water circuit pipeline；
The gas access of i-th depth waste-heat recovery device and gas outlet's phase of the I-1 depth waste-heat recovery device
Even；The gas outlet of i-th depth waste-heat recovery device is connected with the gas access of the I+1 depth waste-heat recovery device；I
The cold water inlet of individual depth waste heat apparatus for recovering is connected with the hot water outlet of the I+1 depth waste-heat recovery device；I-th depth
The hot water outlet of degree waste-heat recovery device is connected with the cold water inlet of the I-1 depth waste-heat recovery device；Wherein, I is integer,
1 ＜ I ＜ N1；
The gas outlet of the N1 depth waste-heat recovery device is connected with the gas access of demister；More than the N1 depth
The cold water inlet of heat reclamation device is connected with the cooling water outlet of preheating humidifying device by circulating chilled water pipeline.
Fig. 2 illustrates the connection figure of 3 depth waste-heat recovery devices.In figure：5-1, the first depth waste-heat recovery device；5-
2nd, the second depth waste-heat recovery device；5-3, the 3rd depth waste-heat recovery device；W1, the cold water from preheating humidifying device；w2-
1st, through the 3rd depth waste-heat recovery device hot water；W2-2, through the second depth waste-heat recovery device hot water；W2, go to preheating
The hot water of humidifying device；Flue gas after q4, burning；Q5-1, flue gas；Q5-2, flue gas；Q5, the flue gas for leading to demister；Its
In, through the 3rd depth waste-heat recovery device hot water temperature less than the second depth waste-heat recovery device hot water temperature, second
Hot water temperature of the hot water temperature of depth waste-heat recovery device less than the first depth waste-heat recovery device, etc.；And through the 3rd
The flue gas of depth waste-heat recovery device leads to demister, the characteristics of which has high humility low temperature.
In one embodiment, for the flue gas of discharge, and the moisture in recovered flue gas, the demister is further dried
For N2, N2 is the integer more than 1；Wherein：
The gas outlet of the 1st demister is connected with the gas access of the 2nd demister；
The gas outlet of j-th demister is connected with the gas access of J+1 demister；Wherein, J is integer, 1
＜ J ＜ N2；
The gas outlet of N2 demister is connected with the gas access of extraneous, EGR simultaneously；Each demisting
The hot water outlet of device is connected with hot water circuit pipeline.
Fig. 3 illustrates the connection figure of 3 demisters.In figure：6-1, the first demister；6-2, the second demister；
6-3, the 3rd demister；Q5, the flue gas from coupled depth waste-heat recovery device；Q5-1, through the first demisting fill
The flue gas that puts；Q5-2, through the second demister flue gas；Q6, through the 3rd demister flue gas；W3-1, the first demisting dress
Put recycle-water, w3-2 the second demister recycle-waters, the 3rd demister recycle-waters of w3-3；11st, hot water circuit pipeline.Wherein,
The characteristics of flue gas of the depth waste-heat recovery device being connected with demister has high humility low temperature, through multiple demisters
After process, become the flue gas of low temperature low humidity, humidity of the flue gas in the multiple demisters being sequentially connected is gradually lowered, pass through
The flue gas that crosses after last demister is processed can be discharged in air, and the heat that multiple demisters are reclaimed from flue gas
Water, flows to waste heat humidifying device through hot water circuit pipeline, is circulated utilization.
Above the disclosure is described in detail, used herein specific case principle of this disclosure and embodiment party
Formula is set forth, and the explanation of above example is only intended to help and understands disclosed method and its core concept；Meanwhile, right
In those skilled in the art, according to the thought of the disclosure, will change in specific embodiments and applications, comprehensive
Upper described, this specification content should not be construed as restriction of this disclosure.
Claims (10)
1. one kind preheats the low nitrogen of humidification and flue gas depth residual neat recovering system, it is characterised in that：
The system includes preheating humidifying device, burner, depth waste-heat recovery device, demister and recirculation dress
Put；Wherein：
The first gaseous mixture entered in which is carried out preheating humidification using hot water and obtains the second gaseous mixture by the preheating humidifying device
And cold water, its gas outlet is connected with the gas access of burner, and its cooling water outlet is by more than circulating chilled water pipeline and depth
The cold water inlet of heat reclamation device is connected；
First gaseous mixture is the gaseous mixture of the flue gas that air is sent back to EGR；
Second mixture combustion is produced the 3rd gaseous mixture, its gas outlet and depth waste-heat recovery device by the burner
Gas access is connected；
Water condensation in 3rd gaseous mixture is obtained the 4th gaseous mixture and hot water by the depth waste-heat recovery device, and its gas goes out
Mouth is connected with the gas access of demister, and its hot water outlet is by hot water circuit pipeline and the hot water inlet for preheating humidifying device
It is connected；
Water condensation in 3rd gaseous mixture is obtained flue gas and the hot water for discharging by the demister, its gas outlet simultaneously with
The entrance of extraneous, EGR is connected, and its hot water outlet is connected with hot water circuit pipeline.
2. system according to claim 1, it is characterised in that：
Preferably, the system also includes the pressurizer for providing flue gas recirculation pressure in whole system；
The gas outlet of the pressurizer is connected with the gas access of preheating humidifying device, or the pressurizer is located at institute
State between gas outlet and the entrance of burner of preheating humidifying device.
3. system according to claim 1, it is characterised in that：
Between 30-60 DEG C, water capacity is between 10-15% for the temperature of second mixed gas.
4. system according to claim 1, it is characterised in that：
The circulating chilled water pipeline provides pressure by first circulation pump；
The hot water circuit pipeline provides pressure by second circulation pump.
5. system according to claim 1, it is characterised in that：
The depth waste-heat recovery device is N1, and N1 is the integer more than 1；Wherein：
1st gas access of depth waste-heat recovery device is connected with the gas outlet of burner, the 1st depth waste heat recovery
The hot water outlet of device is connected with the hot water inlet of preheating humidifying device by hot water circuit pipeline；
The gas access of i-th depth waste-heat recovery device is connected with the gas outlet of the I-1 depth waste-heat recovery device；The
The gas outlet of I depth waste-heat recovery device is connected with the gas access of the I+1 depth waste-heat recovery device；I-th depth
The cold water inlet of degree waste heat apparatus for recovering is connected with the hot water outlet of the I+1 depth waste-heat recovery device；More than i-th depth
The hot water outlet of heat reclamation device is connected with the cold water inlet of the I-1 depth waste-heat recovery device；Wherein, I is integer, 1 ＜ I
＜ N1；
The gas outlet of the N1 depth waste-heat recovery device is connected with the gas access of demister；The N1 depth waste heat is returned
The cold water inlet of receiving apparatus is connected with the cooling water outlet of preheating humidifying device by circulating chilled water pipeline.
6. system according to claim 1, it is characterised in that：
The demister is N2, and N2 is the integer more than 1；Wherein：
The gas outlet of the 1st demister is connected with the gas access of the 2nd demister；
The gas outlet of j-th demister is connected with the gas access of J+1 demister；Wherein, J is integer, 1 ＜ J
＜ N2；
The gas outlet of N2 demister is connected with the gas access of extraneous, EGR simultaneously；
The hot water outlet of each demister is connected with hot water circuit pipeline.
7. system according to claim 1, it is characterised in that：
The EGR includes circulating fan, and the circulating fan is used for accelerating flue gas to flow in the duct.
8. system according to claim 1, it is characterised in that：
The depth waste-heat recovery device is spray column or packed tower；
The depth waste-heat recovery device is condensed can the water in flue gas more than 90% so that flue-gas temperature is reduced to 40-
50 DEG C, the water capacity in flue gas is reduced to less than 2%.
9. system according to claim 1, it is characterised in that：
The demister includes screen type, flat.
10. the system according to Claims 2 or 3, it is characterised in that：
The pressurizer includes blower fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610885903.1A CN106500120A (en) | 2016-10-11 | 2016-10-11 | The low nitrogen of one kind preheating humidification and flue gas depth residual neat recovering system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610885903.1A CN106500120A (en) | 2016-10-11 | 2016-10-11 | The low nitrogen of one kind preheating humidification and flue gas depth residual neat recovering system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106500120A true CN106500120A (en) | 2017-03-15 |
Family
ID=58295048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610885903.1A Pending CN106500120A (en) | 2016-10-11 | 2016-10-11 | The low nitrogen of one kind preheating humidification and flue gas depth residual neat recovering system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106500120A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109268862A (en) * | 2018-09-20 | 2019-01-25 | 北京建筑大学 | The low nitrogen high effective flue gas latent heat utilization system of mixed gas humidification |
| CN111396912A (en) * | 2020-02-24 | 2020-07-10 | 中国神华能源股份有限公司国华电力分公司 | Flue gas heat exchange demister for oxygen-enriched combustion system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090116117A (en) * | 2008-05-06 | 2009-11-11 | 한국에너지기술연구원 | Boiler nox reduction method and system with humidifying combustion air |
| CN102650431A (en) * | 2011-02-26 | 2012-08-29 | 刘长征 | Stepped recycle method for residual heat of fuel gas |
| CN104110675A (en) * | 2014-07-31 | 2014-10-22 | 清华大学 | Deep heat recovery device and deep heat recovery method for boiler smoke |
| CN204460231U (en) * | 2015-03-06 | 2015-07-08 | 安徽新力电业高技术有限责任公司 | A kind of incinerator reduces discharged nitrous oxides system |
| CN205481768U (en) * | 2016-04-12 | 2016-08-17 | 北京森能科技有限公司 | Direct combustion condensing hangs down nitrogen hot water unit |
| CN205579616U (en) * | 2016-04-12 | 2016-09-14 | 北京森能科技有限公司 | Gas boiler hangs down nitrogen air preheater |
| CN206176433U (en) * | 2016-10-11 | 2017-05-17 | 北京市环境保护科学研究院 | Preheat low nitrogen of humidification and flue gas degree of depth waste heat recovery system |
-
2016
- 2016-10-11 CN CN201610885903.1A patent/CN106500120A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090116117A (en) * | 2008-05-06 | 2009-11-11 | 한국에너지기술연구원 | Boiler nox reduction method and system with humidifying combustion air |
| CN102650431A (en) * | 2011-02-26 | 2012-08-29 | 刘长征 | Stepped recycle method for residual heat of fuel gas |
| CN104110675A (en) * | 2014-07-31 | 2014-10-22 | 清华大学 | Deep heat recovery device and deep heat recovery method for boiler smoke |
| CN204460231U (en) * | 2015-03-06 | 2015-07-08 | 安徽新力电业高技术有限责任公司 | A kind of incinerator reduces discharged nitrous oxides system |
| CN205481768U (en) * | 2016-04-12 | 2016-08-17 | 北京森能科技有限公司 | Direct combustion condensing hangs down nitrogen hot water unit |
| CN205579616U (en) * | 2016-04-12 | 2016-09-14 | 北京森能科技有限公司 | Gas boiler hangs down nitrogen air preheater |
| CN206176433U (en) * | 2016-10-11 | 2017-05-17 | 北京市环境保护科学研究院 | Preheat low nitrogen of humidification and flue gas degree of depth waste heat recovery system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109268862A (en) * | 2018-09-20 | 2019-01-25 | 北京建筑大学 | The low nitrogen high effective flue gas latent heat utilization system of mixed gas humidification |
| CN109268862B (en) * | 2018-09-20 | 2020-04-07 | 北京建筑大学 | Low-nitrogen efficient flue gas latent heat utilization system with mixed gas humidification function |
| CN111396912A (en) * | 2020-02-24 | 2020-07-10 | 中国神华能源股份有限公司国华电力分公司 | Flue gas heat exchange demister for oxygen-enriched combustion system |
| CN111396912B (en) * | 2020-02-24 | 2022-07-29 | 中国神华能源股份有限公司国华电力分公司 | Flue gas heat exchange demister for oxygen-enriched combustion system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104748567B (en) | Sintering flue gas waste heat staged cyclic utilization and pollutant emission reducing process and system | |
| CN100441946C (en) | Boiler system of circulating fluid bed burning in oxygen enrichment | |
| CN105020700B (en) | A kind of grate firing boiler combination denitrification apparatus and method | |
| CN103062745B (en) | Water vapor circularly adjusting type oxygen-enriched combustion method for pulverized coal boiler | |
| WO2016161821A1 (en) | Circulating fluidized bed oxygen-enriched combustion apparatus and operation method therefor | |
| CN103615713A (en) | Method and system thereof for oxygen-enriched flameless combustion of coal powder | |
| CN103968373A (en) | Pulverized coal oxygen-rich combustion method and system | |
| CN107559864B (en) | A kind of combustion gas method effectively improving combustion gas furnace thermal efficiency | |
| CN108729965A (en) | The electricity generation system and CO of the part oxygen-enriched combusting of Combined with Calcium base chain2Capture method | |
| CN102563687B (en) | Oxygen-enriched combustion system | |
| CN103331026A (en) | Automatic inertia type spray drying system | |
| CN200975664Y (en) | Oxygen-enriched combustion circulating fluid bed boiler system | |
| CN106500120A (en) | The low nitrogen of one kind preheating humidification and flue gas depth residual neat recovering system | |
| CN102588997B (en) | Oxygen enriched combustion system | |
| CN206176433U (en) | Preheat low nitrogen of humidification and flue gas degree of depth waste heat recovery system | |
| CN107883780A (en) | A kind of wet process of FGD white cigarette controlling device | |
| CN102588996B (en) | Oxygen-enriched combustion system | |
| CN105371295A (en) | Method for utilizing water vapor for improving efficiency of capturing carbon dioxide in flue gas | |
| CN216010897U (en) | Near zero emission oxygen-enriched combustion system of natural gas ceramic kiln flue gas | |
| CN105351918A (en) | Lean oxygen combustion process for improving capture efficiency of carbon dioxide | |
| CN205746815U (en) | Low-NOx coal powder system | |
| CN211651283U (en) | Device for realizing deep recovery of boiler flue gas waste heat and air humidification | |
| CN201170547Y (en) | Oxygenation combustion-supporting device for fire coal electrification boiler of circulating fluid bed | |
| CN207763512U (en) | A kind of wet process of FGD white cigarette controlling device | |
| CN208553728U (en) | Moisture is absorbed to carry out taking off white wet type fume sweetening device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170315 |