CN208635579U - A kind of low energy consumption sintering flue gas denitrification system - Google Patents
A kind of low energy consumption sintering flue gas denitrification system Download PDFInfo
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- CN208635579U CN208635579U CN201821183627.5U CN201821183627U CN208635579U CN 208635579 U CN208635579 U CN 208635579U CN 201821183627 U CN201821183627 U CN 201821183627U CN 208635579 U CN208635579 U CN 208635579U
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- 239000003546 flue gas Substances 0.000 title claims abstract description 122
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 120
- 238000005245 sintering Methods 0.000 title claims abstract description 74
- 238000005265 energy consumption Methods 0.000 title claims abstract description 36
- 239000007789 gas Substances 0.000 claims abstract description 32
- 239000000779 smoke Substances 0.000 claims abstract description 23
- 239000003517 fume Substances 0.000 claims description 27
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 235000019504 cigarettes Nutrition 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 abstract description 14
- 239000002918 waste heat Substances 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 38
- 238000005516 engineering process Methods 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 7
- 238000000746 purification Methods 0.000 description 7
- 239000010959 steel Substances 0.000 description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 6
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- 239000001301 oxygen Substances 0.000 description 6
- 229910052760 oxygen Inorganic materials 0.000 description 6
- 238000001816 cooling Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000003721 gunpowder Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005453 pelletization Methods 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Abstract
The utility model provides a kind of low energy consumption sintering flue gas denitrification system, and the system comprises level-one heat riser, flue gas temperature rise heat exchanger, second level heat riser and denitrification apparatus；The level-one heat riser is provided with the first smoke inlet and exhanst gas outlet, and the exhanst gas outlet of the level-one heat riser is successively connected via flue gas temperature rise heat exchanger, second level heat riser with the smoke inlet of the denitrification apparatus by pipeline；The exhanst gas outlet of the denitrification apparatus is connected by pipeline with the second smoke inlet of the flue gas temperature rise heat exchanger.The system provided by the utility model fully considers and is utilized itself waste heat progress denitration of sintering flue gas, guarantees system reliability service by heat riser concurrent heating, reduces the energy consumption of sintering flue gas denitration most possibly.
Description
Technical field
The utility model relates to a kind of low energy consumption sintering flue gas denitrification systems, belong to sintering flue gas processing technology field.
Background technique
Steel industry is the pillar industry and basic industry of Chinese national economy, but steel industry belongs to high energy again
Consumption, high pollution industry.NOxIt is one of the primary pollution source of steel mill's atmosphere pollution, sintering machine NOxDischarge amount accounts for about the total NO of steel plantx
The 50%-60% of discharge amount is steel mill NOxDischarge formant.NOxIt can cause acid rain and photochemical pollution, destroy smelly
Oxygen layer seriously destroys ecological environment, jeopardizes the health of the mankind.Therefore, steel mill NO is reducedxDischarge, especially sintering plant NOxRow
It puts, it is imperative.The publication of in June, 2017 China's Environmental Protection Department is " about soliciting " steel sintering, pelletizing industrial air pollution object
Discharge standard " etc. 20 National Emission Standards modify the letter of single (exposure draft) opinion (ring do atmosphere letter [2017]
No. 924) ", it is desirable that by sintering device handpiece nitrogen oxides in effluent discharge index from existing 300mg/Nm3It is revised as 100mg/
Nm3.For the environmental protection index for reaching national requirements, sintering plant must add denitrification apparatus.
Gas denitrifying technology mainly includes two class of wet process and dry method flue gas denitration, wherein wet flue gas denitration is mainly logical
Cross the NO in the form absorption flue gas of absorbing liquidxTo reach denitration purpose；Dry method flue gas denitration then mainly includes three classes: selectivity
Catalysis reduction (SCR) technology, non-selective catalytic reduction (SNCR) technology and SCR/SNCR combined denitration technology.SCR denitration
For technology since its device structure is simple, denitration efficiency is high and technology is most mature and becomes the most commonly used denitrating flue gas of domestic application
Technology.To reduce SCR reaction temperature, LSCR comes into being.But the reaction temperature that LSCR is required, the relatively cigarette after sintering desulfuration
Gas is about 70 DEG C, still higher, needs to consume a large amount of energy to guarantee that denitration reaction effectively carries out.
Currently, the domestic technical research about sintering flue gas denitration, or this part problems of energy consumption is not considered, or is considered
It is insufficient, cause energy waste.Therefore it provides a kind of novel low energy consumption sintering flue gas denitrification system and technique have become this
The technical issues of field urgent need to resolve.
Utility model content
In order to solve the above shortcomings and deficiencies, it is de- that the purpose of this utility model is to provide a kind of low energy consumption sintering flue gases
Nitre system.
The purpose of this utility model, which also resides in, provides a kind of low energy consumption sintering flue-gas denitration process.The utility model is provided
System and technique fully consider itself waste heat using sintering flue gas, sintering flue gas denitration energy consumption is reduced, in cleaning flue gases
Meanwhile also reducing energy consumption.
In order to achieve the above objectives, the utility model provides a kind of low energy consumption sintering flue gas denitrification system, wherein the system
Including level-one heat riser, flue gas temperature rise heat exchanger, second level heat riser and denitrification apparatus；
The level-one heat riser is provided with the first smoke inlet and exhanst gas outlet, the exhanst gas outlet of the level-one heat riser
Successively it is connected via flue gas temperature rise heat exchanger, second level heat riser with the smoke inlet of the denitrification apparatus by pipeline；This is de-
The exhanst gas outlet of nitre device is connected by pipeline with the second smoke inlet of the flue gas temperature rise heat exchanger.
According to the utility model specific embodiment, which further includes that hot fume fills
It sets, the first exhanst gas outlet of the flue gas temperature rise heat exchanger is connected by pipeline with the entrance of the hot fume generating device, should
The hot fume outlet of hot fume generating device is connected by pipeline with the second smoke inlet of the second level heat riser.
According to the utility model specific embodiment, in the low energy consumption sintering flue gas denitrification system, the second level heating
Second exhanst gas outlet of device is connected by pipeline with the second smoke inlet of the level-one heat riser.
According to the utility model specific embodiment, which further includes chimney, the cigarette
Second exhanst gas outlet of gas temperature rise heat exchanger is connected by pipeline with the chimney.
According to the utility model specific embodiment, in the low energy consumption sintering flue gas denitrification system, the flue gas heating
Second exhanst gas outlet of heat exchanger is connected via booster fan with the chimney by pipeline.
According to the utility model specific embodiment, in the low energy consumption sintering flue gas denitrification system, the denitrification apparatus
For SCR denitration reaction device or low temperature SCR denitration reaction unit.
According to the utility model specific embodiment, in the low energy consumption sintering flue gas denitrification system, the level-one heating
Device, flue gas temperature rise heat exchanger, second level heat riser, denitrification apparatus, hot fume generating device and booster fan etc. are this
The conventional equipment that field uses.
Wherein, flue gas temperature rise heat exchanger is that the high temperature purification flue gas of outflow denitrification apparatus is low with outflow level-one heat riser
The device that warm flue gas exchanges heat.
Second level heat riser be by temperature be 1000 DEG C or so high-temperature flue gas (as can be for from hot fume generating device
High-temperature flue gas) in a manner of being directly mixed in low-temperature flue gas or between high-temperature medium (such as steam, flue gas, fused salt, conduction oil working medium)
Connect the heating mode of heat exchange improve flue-gas temperature to denitrating catalyst efficient operation temperature range device；It can pass through
High-temperature flue gas is directly mixed in low-temperature flue gas by injection apparatus, also can use higher temperature carrier, by way of indirect heat exchange,
By the heat transfer of higher temperature carrier to low-temperature flue gas, to promote the temperature of low-temperature flue gas to the efficient operation temperature of denitrating catalyst
Section.
In specific embodiment of the present invention, the hot fume generating device can be fume generating furnace.
It is low that low energy consumption sintering flue gas denitrification system described in the utility model can be adapted for a variety of different techniques progress
Energy consumption sintering flue gas denitration, in order to further be illustrated to the system of the utility model, the utility model additionally provides application
The system carry out the processing of low energy consumption sintering denitrating flue gas technique, the technique the following steps are included:
It heats up to the sintering flue gas, then the sintering flue gas after will heat up carries out denitration process, institute after denitration process
It obtains high temperature purification flue gas and is emitted into atmosphere after heat exchange is cooling.
According to the utility model specific embodiment, the low energy consumption sintering flue-gas denitration process specifically includes the following steps:
(1) sintering flue gas is heated, tentatively to remove the moisture in flue gas；
(2) gained high temperature purification flue gas after denitration process is exchanged heat with sintering flue gas obtained by step (1), so that the burning
Knot flue gas heats up again, then by high temperature purification flue gas emission after cooling to atmosphere；
(3) gained sintering flue gas after further heating stepses (2) heat up again；
(4) denitration process is carried out to gained sintering flue gas after step (3) further heating.
According to the utility model specific embodiment, in the low energy consumption sintering flue-gas denitration process, step (1) tentatively adds
The purpose of the heat sintering flue gas is the moisture removed in flue gas, avoids acid corrosion.
According to the utility model specific embodiment, in the low energy consumption sintering flue-gas denitration process, it is described be cooled to by
The temperature of gained high temperature purification flue gas is reduced to 65 DEG C or more after denitration process.
According to the utility model specific embodiment, in the low energy consumption sintering flue-gas denitration process, described in step (2)
Heating is that the sintering flue gas temperature is risen to 150 DEG C or so again.
According to the utility model specific embodiment, in the low energy consumption sintering flue-gas denitration process, step (3) packet
Include: gained sintering flue gas is used as hot wind aid fuel combustion after part steps (2) are heated up again, obtains hot fume；It recycles
The hot fume further heats gained sintering flue gas after another part heats up again.
It is described further to add in the low energy consumption sintering flue-gas denitration process according to the utility model specific embodiment
The hot fume return step (1) being cooled after heat is for tentatively heating the sintering flue gas.
According to the utility model specific embodiment, in the low energy consumption sintering flue-gas denitration process, described in step (4)
Denitration process is that low temperature SCR denitration is handled or SCR denitration is handled.
According to the utility model specific embodiment, in the low energy consumption sintering flue-gas denitration process, at the denitration
When reason is low temperature SCR denitration processing, step (3) is described be further heated to be will heat up again after gained sintering flue gas be heated to
260 DEG C or so；
When the denitration process is that SCR denitration is handled, step (3) is described be further heated to be will heat up again after gained
Sintering flue gas is heated to 180-190 DEG C.
According to the utility model specific embodiment, in the low energy consumption sintering flue-gas denitration process, the sintering flue gas
Usually contain sour corrosion gas (such as SO2、NOxDeng) Low Temperature Wet sintering flue gas, for this field generate conventional flue gas,
The flue-gas temperature is about 70 DEG C, and contains more moisture.
Itself waste heat of low energy consumption sintering flue gas denitrification system and process makes full use flue gas provided by the utility model adds
Hot fume reduces energy consumption；The hot fume that hot fume generating device generates (is such as used for by the system and technique cascade utilization external heat source
Second level heat riser, it still has partial heat after cooling, can be further used as the heat source of level-one heat riser), guarantee that denitration is anti-
Temperature is answered, reduces energy consumption while to guarantee denitration efficiency；Using the sintering flue gas of low oxygen content, (wherein, low oxygen content is
Refer to the oxygen content in sintering flue gas lower than the oxygen content in air) it burns as hot wind, it reduces and need to take off while stablizing burning
The oxygen content of smoke of gunpowder gas reduces the amount of injection of reducing agent to reduce nitrogen oxides reduced value, improves economy.I.e. should
System and technique not only ensure that sintering denitrating system efficiently, reliably, is steadily run, and be also fully utilized by fume afterheat, entirely
Face utilizes external heat source.
To sum up, the system and technique provided by the utility model fully consider and itself waste heat of sintering flue gas are utilized
Denitration is carried out, guarantees system reliability service by heat riser concurrent heating, reduces the energy of sintering flue gas denitration most possibly
Consumption.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of low energy consumption sintering flue gas denitrification system provided by the utility model embodiment 1.
Main Reference label declaration:
1, level-one heat riser；
2, flue gas temperature rise heat exchanger；
3, second level heat riser；
4, denitrification apparatus；
5, hot fume generating device；
6, booster fan；
7, chimney.
Specific embodiment
The implementation process of the utility model and having for generation is described in detail below by way of specific embodiment and Figure of description
Beneficial effect, it is intended to help reader to more fully understand the essence and feature of the utility model, not as to this case enforceable range
Restriction.
Embodiment 1
Present embodiments provide a kind of low energy consumption sintering flue gas denitrification system, the structural schematic diagram of the system as shown in Figure 1,
From figure 1 it appears that the system comprises level-one heat riser 1, flue gas temperature rise heat exchanger 2, second level heat risers 3, denitration
Device 4, hot fume generating device 5, booster fan 6 and chimney 7；
The level-one heat riser 1 is provided with the first smoke inlet, the second smoke inlet and exhanst gas outlet；Sintering flue gas passes through
Pipeline enters the level-one heat riser 1 via first smoke inlet, and the exhanst gas outlet of the level-one heat riser 1 passes through pipeline
Successively via flue gas temperature rise heat exchanger 2 (the first smoke inlet and the first exhanst gas outlet), (the first flue gas enters second level heat riser 3
Mouth and the first exhanst gas outlet) it is connected with the smoke inlet of the denitrification apparatus 4；The exhanst gas outlet of the denitrification apparatus 4 passes through pipeline
It is connected with the second smoke inlet of the flue gas temperature rise heat exchanger 2；
First exhanst gas outlet of the flue gas temperature rise heat exchanger 2 also passes through entering for pipeline and the hot fume generating device 5
Mouthful be connected, the outlet of the hot fume of the hot fume generating device 5 by pipeline via second level heat riser 3 (the second smoke inlet and
Second exhanst gas outlet) it is connected with the second smoke inlet of the level-one heat riser 1；
Second exhanst gas outlet of the flue gas temperature rise heat exchanger 2 is connected via booster fan 6 with the chimney 7 by pipeline.
The denitrification apparatus 4 is SCR denitration reaction device or low temperature SCR denitration reaction unit.
Embodiment 2
Present embodiments provide a kind of low energy consumption sintering flue-gas denitration process, wherein the technique is mentioned using embodiment 1
Supply the low energy consumption sintering flue gas denitrification system realize, the technique comprising the following specific steps
(1) sintering flue gas (the Low Temperature Wet sintering flue gas such as containing sour corrosion gas) is by pipeline via its first flue gas
Entrance enters the level-one heat riser 1, and tentatively heats the sintering flue gas in the level-one heat riser 1, to remove smoke abatement
Moisture in gas, avoids acid corrosion；
(2) by sintering flue gas obtained by gained high temperature purification flue gas after denitration process and step (1) in flue gas temperature rise heat exchanger 2
In exchange heat so that the sintering flue gas is warming up to about 150 DEG C again, then (its temperature is by high temperature purification flue gas after cooling
110 DEG C or so) pressurized blower 6 and chimney 7 be emitted into atmosphere；
(3) gained sintering flue gas is sent to hot fume generating device 5 after partially heating up again, is used as hot wind auxiliary fuel and is fired
It burns, obtains hot fume；The hot fume is recycled further to heat gained after another part heats up again in second level heat riser 3
Sintering flue gas；The level-one heat riser for the hot fume return step (1) being cooled after further being heated described in step (3) again
For tentatively heating the sintering flue gas in 1；
When the denitration process is that low temperature SCR denitration is handled, step (3) is described to be further heated to be another part again
Gained sintering flue gas is heated to 260 DEG C or so after secondary heating；
When the denitration process is that SCR denitration is handled, step (3) is described to be further heated to be and rises another part again
Gained sintering flue gas is heated to 180-190 DEG C after temperature；
(4) denitration process is carried out in denitrification apparatus 4 to gained sintering flue gas after step (3) further heating.
The above, only specific embodiment of the utility model cannot limit the range that utility model is implemented, institute with it
With the displacement of its equivalent assemblies, or according to equivalent variations made by the utility model patent protection scope and modification, should all still fall within
The scope that this patent is covered.
Claims (6)
1. a kind of low energy consumption sintering flue gas denitrification system, which is characterized in that the system comprises level-one heat risers (1), flue gas
Temperature rise heat exchanger (2), second level heat riser (3) and denitrification apparatus (4)；
The level-one heat riser (1) is provided with the first smoke inlet and exhanst gas outlet, and the flue gas of the level-one heat riser (1) goes out
Mouth is successively entered via flue gas temperature rise heat exchanger (2), second level heat riser (3) and the flue gas of the denitrification apparatus (4) by pipeline
Mouth is connected；The exhanst gas outlet of the denitrification apparatus (4) passes through the second smoke inlet phase of pipeline and the flue gas temperature rise heat exchanger (2)
Even.
2. system according to claim 1, which is characterized in that described the system also includes hot fume generating device (5)
First exhanst gas outlet of flue gas temperature rise heat exchanger (2) is connected by pipeline with the entrance of the hot fume generating device (5), the heat
The hot fume outlet of smoke generating apptss (5) is connected by pipeline with the second smoke inlet of the second level heat riser (3).
3. system according to claim 2, which is characterized in that the second exhanst gas outlet of the second level heat riser (3) is logical
Pipeline is crossed to be connected with the second smoke inlet of the level-one heat riser (1).
4. system according to claim 1-3, which is characterized in that the system also includes chimney (7), the cigarettes
Second exhanst gas outlet of gas temperature rise heat exchanger (2) is connected by pipeline with the chimney (7).
5. system according to claim 4, which is characterized in that the second exhanst gas outlet of the flue gas temperature rise heat exchanger (2)
It is connected via booster fan (6) with the chimney (7) by pipeline.
6. system according to claim 1, which is characterized in that the denitrification apparatus (4) is SCR denitration reaction device or low
Warm SCR denitration reaction device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821183627.5U CN208635579U (en) | 2018-07-25 | 2018-07-25 | A kind of low energy consumption sintering flue gas denitrification system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821183627.5U CN208635579U (en) | 2018-07-25 | 2018-07-25 | A kind of low energy consumption sintering flue gas denitrification system |
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| Publication Number | Publication Date |
|---|---|
| CN208635579U true CN208635579U (en) | 2019-03-22 |
Family
ID=65738302
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|---|---|---|---|
| CN201821183627.5U Withdrawn - After Issue CN208635579U (en) | 2018-07-25 | 2018-07-25 | A kind of low energy consumption sintering flue gas denitrification system |
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| Country | Link |
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| CN (1) | CN208635579U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108759495A (en) * | 2018-07-25 | 2018-11-06 | 北京京诚科林环保科技有限公司 | A kind of low energy consumption sintering flue gas denitrification system and technique |
-
2018
- 2018-07-25 CN CN201821183627.5U patent/CN208635579U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108759495A (en) * | 2018-07-25 | 2018-11-06 | 北京京诚科林环保科技有限公司 | A kind of low energy consumption sintering flue gas denitrification system and technique |
| CN108759495B (en) * | 2018-07-25 | 2024-01-05 | 北京京诚科林环保科技有限公司 | Low-energy-consumption sintering flue gas denitration system and process |
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