CN208742254U - Acid washing rolled steel exhaust gas defluorinate denitrification apparatus - Google Patents
Acid washing rolled steel exhaust gas defluorinate denitrification apparatus Download PDFInfo
- Publication number
- CN208742254U CN208742254U CN201820462334.4U CN201820462334U CN208742254U CN 208742254 U CN208742254 U CN 208742254U CN 201820462334 U CN201820462334 U CN 201820462334U CN 208742254 U CN208742254 U CN 208742254U
- Authority
- CN
- China
- Prior art keywords
- flue
- exhaust gas
- defluorinate
- outlet
- ammonia
- 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.)
- Withdrawn - After Issue
Links
- 238000005406 washing Methods 0.000 title claims abstract description 27
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 19
- 239000010959 steel Substances 0.000 title claims abstract description 19
- 239000002253 acid Substances 0.000 title claims abstract description 18
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 100
- 239000007789 gas Substances 0.000 claims abstract description 83
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 50
- 238000002156 mixing Methods 0.000 claims abstract description 38
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 30
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000002912 waste gas Substances 0.000 claims abstract description 25
- 238000006243 chemical reaction Methods 0.000 claims abstract description 20
- 239000003518 caustics Substances 0.000 claims abstract description 18
- 230000008676 import Effects 0.000 claims abstract description 15
- 239000003345 natural gas Substances 0.000 claims abstract description 15
- 230000003139 buffering effect Effects 0.000 claims abstract description 10
- 238000007599 discharging Methods 0.000 claims abstract description 3
- 230000002209 hydrophobic effect Effects 0.000 claims description 23
- 239000003054 catalyst Substances 0.000 claims description 19
- 239000007921 spray Substances 0.000 claims description 19
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 15
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 15
- 239000012530 fluid Substances 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 11
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 10
- 239000003546 flue gas Substances 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 8
- 239000002918 waste heat Substances 0.000 claims description 7
- 235000019504 cigarettes Nutrition 0.000 claims description 4
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 3
- 230000003712 anti-aging effect Effects 0.000 claims description 3
- 238000013459 approach Methods 0.000 claims description 3
- 239000010962 carbon steel Substances 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 3
- 239000000908 ammonium hydroxide Substances 0.000 description 10
- 238000005554 pickling Methods 0.000 description 10
- 238000000034 method Methods 0.000 description 8
- 238000001914 filtration Methods 0.000 description 6
- 239000012535 impurity Substances 0.000 description 5
- 238000005507 spraying Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000010790 dilution Methods 0.000 description 3
- 239000012895 dilution Substances 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 239000003344 environmental pollutant Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000000505 pernicious effect Effects 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 229910010271 silicon carbide Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 239000000872 buffer Substances 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 150000004820 halides Chemical class 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 125000000627 niacin group Chemical group 0.000 description 1
- 238000006396 nitration reaction Methods 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000002000 scavenging effect Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Abstract
The utility model provides a kind of acid washing rolled steel exhaust gas defluorinate denitrification apparatus, reasonable in design, investment cost is reasonable, economical operation is stable.Collecting flue is connect with caustic wash tower；Caustic wash tower and water scrubber pass through connection flue connection；Water scrubber is connected with the import of level-one demister by buffering flue；Level-one demister is connected with second level demister by horizontal flue；Second level demister is connected with shell-and-tube heat exchanger by defluorinate exhaust gas entrance flue；Heated by natural gas module is connected with shell-and-tube heat exchanger by defluorinate waste gas outlet flue；Heated by natural gas module is connected with mixing module by high-temperature flue；For ammonia module with mixing module by being connected for ammonia pipeline；Mixing module is connected with low-temp reaction device by mixing flue；Low-temp reaction device is connected with shell-and-tube heat exchanger by denitration exhaust gas entrance flue；Shell-and-tube heat exchanger is connected with air-introduced machine by denitration waste gas outlet flue；Air-introduced machine is connected with the entrance of ammonia removal tower by discharging flue.
Description
Technical field
The utility model relates to a kind of acid washing rolled steel exhaust gas defluorinate denitrification apparatus, belong to pickling exhaust-gas treatment field.
Background technique
Pickling can not only remove the oxide skin of steel surface, but also can be passivated its surface, improve its corrosion resistance.When
Steel use nitration mixture (HNO3+ HF) pickling, pickling temperature be 40-60 DEG C when, the pickling exhaust gas such as a large amount of HF, NOx can be generated.Tradition
Method of the processing containing HF, NOx pickling exhaust gas has: using water or lye spray-absorption HF, high temperature SCR method, oxidative absorption method or
Dry adsorption method removes NOx.
Concentration of emission≤6mg/Nm of regulation HF in " rolling industry atmosphere pollutants emission standards "3、NOxConcentration of emission≤
150mg/Nm3.With being increasingly stringenter for national standard, single tupe is low with purification thinking one side treatment effeciency,
The qualified discharge of exhaust gas it is not able to satisfy, another aspect system fluctuation of service and energy consumption is higher.Therefore, the combination of kinds of processes
And the appearance of new technology is extremely urgent.
Utility model content
The purpose of the utility model is to overcome the above deficiencies in the existing technologies, and provide a kind of structure design conjunction
Reason, the acid washing rolled steel exhaust gas defluorinate denitrification apparatus that investment cost is reasonable, economical operation is stable.
The technical scheme in the invention for solving the above technical problem is: a kind of acid washing rolled steel exhaust gas defluorinate denitration dress
It sets, it is characterised in that: urged including spray washing part, demisting part, Waste Heat Reuse part, heating note ammonia mixing portion, low temperature
Change reactive moieties and discharge unit；
Spray washing part includes collecting flue, caustic wash tower, connection flue and water scrubber；Collecting flue and caustic wash tower into
Mouth connection；The outlet of caustic wash tower and the import of water scrubber pass through connection flue connection；
Demisting part includes buffering flue, level-one demister, horizontal flue and second level demister；The outlet of water scrubber and one
The import of grade demister passes through buffering flue connection；The outlet of level-one demister and the import of second level demister pass through horizontal flue
Connection；
Waste Heat Reuse part includes that defluorinate exhaust gas entrance flue, defluorinate waste gas outlet flue, shell-and-tube heat exchanger, denitration are useless
Gas gas approach and denitration waste gas outlet flue；The outlet of second level demister and the cold fluid inlet of shell-and-tube heat exchanger pass through de-
The connection of fluorine exhaust gas entrance flue；
Heating note ammonia mixing portion include heated by natural gas module, high-temperature flue, mixing module, for ammonia module and for ammonia pipe
Line；The entrance of heated by natural gas module is connected with the cold fluid outlet of shell-and-tube heat exchanger by defluorinate waste gas outlet flue；It
The outlet of right gas heating module is connected with the defluorinate exhaust gas entrance of mixing module by high-temperature flue；Outlet for ammonia module and mixed
The ammonia entrance of block is molded by connecting for ammonia pipeline；
Low-temperature catalyzed reactive moieties include mixing flue and low-temp reaction device；The outlet of mixing module and low-temp reaction device
Import passes through mixing flue connection；The outlet of low-temp reaction device and the thermal fluid inlet of shell-and-tube heat exchanger are entered by denitration exhaust gas
Mouth flue connection；
Discharge unit includes air-introduced machine, discharge flue and ammonia removal tower；The hot fluid outlet ports and air-introduced machine of shell-and-tube heat exchanger
Entrance pass through denitration waste gas outlet flue connect；The outlet of air-introduced machine is connected with the entrance of ammonia removal tower by discharging flue.
Caustic wash tower and water scrubber described in the utility model are made of anti-aging antiultraviolet PP plate.
The nozzle of lye spraying layer described in the utility model and washing layer is spiral solid-cone form, spray angle 90
Degree.
Level-one demister and second level demister described in the utility model are arranged horizontally.
Ammonia water spray gun is provided in mixing module described in the utility model.
First row ash bucket, first row are disposed with by flue gas circulating direction in low-temp reaction device described in the utility model
Catalyst layer, secondary series ash bucket, secondary series catalyst layer, third column ash bucket and third column catalyst layer.
Two layers of water spray layer and two layers of demisting are set gradually by flue gas circulating direction in ammonia removal tower described in the utility model
Layer.
Demisting part described in the utility model further includes the first automatic hydrophobic pipeline and the second automatic hydrophobic pipeline；First
Automatic hydrophobic pipeline and the second automatic hydrophobic pipeline are located at level-one demister and second level demister bottom.
Collecting flue described in the utility model, connection flue, buffering flue, horizontal flue, defluorinate exhaust gas entrance flue
It is FRP material, the defluorinate waste gas outlet flue, high-temperature flue, mixing flue, denitration exhaust gas entrance flue, denitration are useless
Gas exhaust pass, discharge flue are carbon steel material.
It is U-shaped there are two being respectively set in first automatic hydrophobic pipeline described in the utility model and the second automatic hydrophobic pipeline
It is curved.
The utility model compared with prior art, has the following advantages that and effect:
(1), caustic wash tower+water scrubber combination, totally one layer of equal+two layers lye spraying layer+two layers of gas-bearing formation washes layer, can spirit
HF and other acid impurities in effective removal pickling exhaust gas living, so that pickling exhaust gas is more clean；
(2), the level-one demister and second level demister of single horizontal arrangement, it is convenient to overhaul, and coarse filtration and essence filtering
Combination it is complementary, can the profound droplet reduced in exhaust gas, provided safeguard for good run of subsequent technique；
(3), the selection of shell-and-tube heat exchanger can both be such that the exhaust gas in defluorinate waste gas outlet flue adds into natural gas
Temperature increases before thermal modules, and the exhaust gas discharge temperature in denitration waste gas outlet flue can be made to reduce, and is guaranteeing Waste Heat Reuse
While, the dosage of natural gas can be not only reduced, but also the cost of investment of discharge unit can be reduced, as air-introduced machine and discharge flue are not required to
To carry out Selection and Design according to 200 DEG C or more of high temperature；
(4), the setting of ammonia removal tower, further purification absorbs the ammonia in exhaust gas, and scavenging solution can be recycled to for ammonia module
It utilizes again.
(5), as HF initial concentration≤400mg/Nm in pickling exhaust gas3, NOxInitial concentration≤4000mg/Nm3When, pass through this
Utility model can meet the requirement of pollutant emission specified in " rolling industry atmosphere pollutants emission standards ", so that pickling is useless
Gas being capable of clean emission up to standard.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model embodiment.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawing and by embodiment, and following embodiment is pair
The explanation of the utility model and the utility model is not limited to following embodiment.
Referring to Fig. 1, the utility model embodiment includes spray washing part, demisting part, Waste Heat Reuse part, heating note
Ammonia mixing portion, low-temperature catalyzed reactive moieties and discharge unit.
One, spray washing part includes collecting flue 1.1, caustic wash tower 1.2, connection flue 1.3 and water scrubber 1.4.
Collecting flue 1.1 is connect with 1.2 import of caustic wash tower.The outlet of caustic wash tower 1.2 and 1.4 import of water scrubber pass through connection cigarette
Road 1.3 connects.One layer of equal gas-bearing formation and two layers of lye spraying layer are set gradually by flue gas circulating direction in caustic wash tower 1.2.Water scrubber
Two layers of washing layer is set gradually by flue gas circulating direction in 1.4.
Caustic wash tower 1.2 and water scrubber 1.4 are made of anti-aging antiultraviolet PP plate.
Exhaust gas flow velocity 8-10m/s in collecting flue 1.1；Void tower flow velocity 2m/s or so in caustic wash tower 1.2 and water scrubber 1.4；
Exhaust gas flow velocity 1.5-2m/s in level-one demister 2.2 and second level demister 2.5.Reasonable flow velocity selection, connects solution-air, gas-gas
Touch more abundant, raising system stability, reduction pernicious gas escapement ratio.
The nozzle of lye spraying layer and washing layer is high efficiency spiral solid-cone form, and 90 degree of spray angle, material selects
Silicon carbide.
Two, demisting part includes buffering flue 2.1, level-one demister 2.2, the first automatic hydrophobic pipeline 2.3, horizontal flue
2.4, second level demister 2.5 and the second automatic hydrophobic pipeline 2.6.
The outlet of water scrubber 1.4 and 2.2 import of level-one demister are connected by buffering flue 2.1.Level-one demister 2.2 exports
It is connected with 2.5 import of second level demister by horizontal flue 2.4.First automatic hydrophobic pipeline 2.3 and the second automatic hydrophobic pipeline
2.6 are located at 2.5 bottom of level-one demister 2.2 and second level demister.
It is U-shaped curved there are two being respectively set in first automatic hydrophobic pipeline 2.3 and the second automatic hydrophobic pipeline 2.6, it can make to remove
Day with fog continuous Auto-drainage when working, and fluid-tight can be played the role of when it does not work.
Level-one demister 2.2 and second level demister 2.5 are arranged horizontally, and level-one demister 2.2 is coarse filtration, by more
Face hollow sphere filler realizes that second level demister 2.5 is essence filtering, is realized by the way that flue gas flow direction is varied multiple times.
First automatic hydrophobic pipeline 2.3 and all elbow junctions of the second automatic hydrophobic pipeline 2.6 are all made of flanged joint.
Three, Waste Heat Reuse part includes that defluorinate exhaust gas entrance flue 3.1a, defluorinate waste gas outlet flue 3.1b, shell-and-tube change
Hot device 3.2, denitration exhaust gas entrance flue 3.3a and denitration waste gas outlet flue 3.3b.
The outlet of second level demister 2.5 and the cold fluid inlet of shell-and-tube heat exchanger 3.2 pass through defluorinate exhaust gas entrance flue
3.1a connection.
(such as: collecting flue 1.1, buffers flue 2.1, horizontal cigarette at connection flue 1.3 to flue before shell-and-tube heat exchanger 3.2
Road 2.4, defluorinate exhaust gas entrance flue 3.1a) it is FRP material, the exhaust gas in defluorinate exhaust gas entrance flue 3.1a is through pipe shell type heat exchange
3.2 temperature of device increases, rear pass (such as: defluorinate waste gas outlet flue 3.1b, high-temperature flue 4.2, mixing flue 5.1, denitration are useless
Gas gas approach 3.3a, denitration waste gas outlet flue 3.3b, discharge flue 6.2) use carbon steel material.
Four, heating note ammonia mixing portion include heated by natural gas module 4.1, high-temperature flue 4.2, mixing module 4.3, for ammonia
Module 4.4 and for ammonia pipeline 4.5.
The entrance of heated by natural gas module 4.1 and the cold fluid outlet of shell-and-tube heat exchanger 3.2 pass through defluorinate waste gas outlet
Flue 3.1b connection.The outlet of heated by natural gas module 4.1 and the defluorinate exhaust gas entrance of mixing module 4.3 pass through high-temperature flue
4.2 connection.The ammonia entrance of outlet and mixing module 4.3 for ammonia module 4.4 for ammonia pipeline 4.5 by connecting.Mixing module
Contain ammonia water spray gun in 4.3.
Top burner and lower part burner dislocation arrangement in heated by natural gas module 4.1, can make flame all standing, to reach
Reasonable distribution energy and uniform temperature, and can burn sufficiently, it is generated without pernicious gases such as CO, not will cause secondary dirt
Dye.Burner material uses silicon carbide.Fuel is pipe natural gas, low heat value: 8500 kilocalories/Nm3。
Select (wt) 20% concentration ammonium hydroxide for reducing agent in ammonia module 4.4, (wt) 20% concentration ammonium hydroxide as denitrification reducing agent,
One side ammonium hydroxide vapourizing temperature is low, and another aspect ammonium hydroxide investment operating cost is below urea.
Ammonia water spray gun in mixing module 4.3 uses two-fluid fan nozzle, and 60 degree of spray angle, spray gun and nozzle material
Select 310S.
Compressed air purging is respectively provided with using stainless steel material containing ammonium hydroxide and dilution water pipeline for ammonia pipeline 4.5.
Five, low-temperature catalyzed reactive moieties include mixing flue 5.1, low-temp reaction device 5.2, first row catalyst layer 5.21,
First row ash bucket 5.22, secondary series catalyst layer 5.23, secondary series ash bucket 5.24, third column catalyst layer 5.25 and third column ash
Bucket 5.26.
The outlet of mixing module 4.3 and the import of low-temp reaction device 5.2 are connected by mixing flue 5.1.Low-temp reaction device
5.2 outlet is connected with the thermal fluid inlet of shell-and-tube heat exchanger 3.2 by denitration exhaust gas entrance flue 3.3a.
First row ash bucket 5.22, first row catalyst layer are disposed with by flue gas circulating direction in low-temp reaction device 5.2
5.21, secondary series ash bucket 5.24, secondary series catalyst layer 5.23, third column ash bucket 5.26 and third column catalyst layer 5.25.
Low-temp reaction device 5.2 is horizontal type structure, and three column ash buckets are arranged in 5.2 lower section of low-temp reaction device.
Catalyst layer in low-temp reaction device 5.2 selects low temperature catalyst, and active temperature section is 180-260 DEG C, low
The active temperature of warm catalyst is lower than high temperature catalyst, further reduced energy loss and system configuration.
Six, discharge unit includes air-introduced machine 6.1, discharge flue 6.2 and ammonia removal tower 6.3.
The hot fluid outlet ports of shell-and-tube heat exchanger 3.2 and the entrance of air-introduced machine 6.1 pass through denitration waste gas outlet flue 3.3b
Connection.The outlet of air-introduced machine 6.1 and the entrance of ammonia removal tower 6.3 are connected by discharge flue 6.2.Flue gas stream is pressed in ammonia removal tower 6.3
Logical direction sets gradually two layers of water spray layer and two layers of demisting layer.
Ammonia removal tower 6.3 is nicotinic acids structure, using stainless steel material.
A kind of operation method of acid washing rolled steel exhaust gas defluorinate denitrification apparatus, comprising the following steps:
(1), acid washing rolled steel exhaust gas is collected flue 1.1 and collects remittance caustic wash tower 1.2, the equal flow distribution in equal gas-bearing formation, warp
Two layers of lye countercurrent spray removes major part HF in exhaust gas, enters water scrubber 1.4 later, then by two layers of water counter current washes, give up
HF is fully absorbed purification in gas, while dust in exhaust gas and other impurities are also cleaned being segregated into lye and water-soluble together
In liquid, the low temperature catalyst system stable operation for after provides guarantee, prevent its by exhaust gas dust and impurity abrasion, with
And it is avoided to be poisoned by halide impurities such as HF；The number of plies that puts into operation of spraying layer and washing layer can flexibly be adjusted according to load variations
It is whole.
(2), the exhaust gas after defluorinate enters level-one demister 2.2 and second level demister 2.5 through buffering flue 2.1, and level-one is removed
Day with fog 2.2 is coarse filtration, is realized by polyhedron empty ball filler；Second level demister 2.5 is essence filtering, by the way that flue gas is varied multiple times
Flow direction achievees the effect that demisting so that the drop in gas is constantly fallen with after the collision of demister plate face, cohesion.It is removed through level-one
The drop that day with fog 2.2 and second level demister 2.5 are removed passes through the first automatic hydrophobic pipeline 2.3 and the second automatic hydrophobic pipeline 2.6
Discharge, the 2.6 continuous Auto-drainage of energy of the first automatic hydrophobic pipeline 2.3 and the second automatic hydrophobic pipeline, can also play when not working
The effect of fluid-tight.
(3), the exhaust gas in defluorinate exhaust gas entrance flue 3.1a (temperature is 40-50 DEG C) through shell-and-tube heat exchanger 3.2 and takes off
It is useless in defluorinate waste gas outlet flue 3.1b after exhaust gas (temperature is 200-250 DEG C) heat exchange in nitre exhaust gas entrance flue 3.3a
Temperature degree is 80-100 DEG C, and avoidable devices in system is corroded, the exhaust gas temperature after heat exchange in denitration waste gas outlet flue 3.3b
Degree is down to 100-150 DEG C.
(4), the exhaust gas in defluorinate waste gas outlet flue 3.1b (temperature is 80-100 DEG C) is in heated by natural gas module 4.1
In be heated to 180-260 DEG C enter mixing module 4.3, to confess that ammonium hydroxide and the dilution water of ammonia module 4.4 pass through for ammonia pipeline
4.5 enter ammonia water spray gun, and the ammonium hydroxide after diluting in mixing module 4.3 sufficiently vaporizes mixing.Ammonium hydroxide and dilution water pipeline are not set
Heat tracing and heat preservation are set, after shutdown, by the ammonium hydroxide after flushing and water pipeline purging is diluted completely using compressed air, that is, is conducive to inspection
It repairs, and the extraction raffinate ice blockage in pipeline can be prevented.
(5), the mixed gas of exhaust gas and ammonia enters low-temp reaction device 5.2 through mixing flue 5.1, in low temperature catalyst
Under the action of, achieve the effect that denitration.Soot blower, dust and impurity is not provided in low-temp reaction device 5.2 to receive by gravitational settling
Collection is in the ash bucket before each column catalyst layer.
(6), the exhaust gas in denitration waste gas outlet flue 3.3b drains into ammonia removal tower through air-introduced machine 6.1 and discharge flue 6.2
6.3, to guarantee denitration efficiency, excessive ammonium hydroxide need to be supplied into mixing module 4.3 for ammonia module 4.4, a portion ammonia
With NOxReaction forms nitrogen and water, and remaining ammonia then enters ammonia removal tower 6.3 therewith can will give up by two layers of water counter current washes
Ammonia absorption cleaning in gas, liquid to be clean reach a certain concentration, can be recycled to for ammonia module 4.4 and utilize again.Last exhaust gas
By 6.3 tower top smoke stack emission of ammonia removal tower after demisting.
In addition, it should be noted that, the specific embodiments described in this specification, the shape of parts and components are named
Title etc. can be different, and above content is only to the utility model structure example explanation described in this specification.
All equivalence changes or simple change done according to structure, feature and principle described in the concept of the patent of the utility model, are wrapped
It includes in the protection scope of the utility model patent.Those skilled in the art of the present invention can be to described
Specific embodiment does various modifications or additions or is substituted in a similar manner, without departing from the knot of the utility model
Structure or beyond the scope defined by this claim, all should belong to the protection range of the utility model.
Claims (9)
1. a kind of acid washing rolled steel exhaust gas defluorinate denitrification apparatus, it is characterised in that: including spray washing part, demisting part, waste heat
Utilize part, heating note ammonia mixing portion, low-temperature catalyzed reactive moieties and discharge unit；
Spray washing part includes collecting flue, caustic wash tower, connection flue and water scrubber；The import of collecting flue and caustic wash tower connects
It connects；The outlet of caustic wash tower and the import of water scrubber pass through connection flue connection；
Demisting part includes buffering flue, level-one demister, horizontal flue and second level demister；The outlet of water scrubber and level-one are removed
The import of day with fog passes through buffering flue connection；The outlet of level-one demister and the import of second level demister are connected by horizontal flue
It connects；
Waste Heat Reuse part includes that defluorinate exhaust gas entrance flue, defluorinate waste gas outlet flue, shell-and-tube heat exchanger, denitration exhaust gas enter
Mouth flue and denitration waste gas outlet flue；The outlet of second level demister and the cold fluid inlet of shell-and-tube heat exchanger are useless by defluorinate
The connection of gas gas approach；
Heating note ammonia mixing portion include heated by natural gas module, high-temperature flue, mixing module, for ammonia module and for ammonia pipeline；
The entrance of heated by natural gas module is connected with the cold fluid outlet of shell-and-tube heat exchanger by defluorinate waste gas outlet flue；Natural gas
The outlet of heating module is connected with the defluorinate exhaust gas entrance of mixing module by high-temperature flue；Outlet and hybrid guided mode for ammonia module
The ammonia entrance of block for ammonia pipeline by connecting；
Low-temperature catalyzed reactive moieties include mixing flue and low-temp reaction device；The outlet of mixing module and the import of low-temp reaction device
Pass through mixing flue connection；The outlet of low-temp reaction device and the thermal fluid inlet of shell-and-tube heat exchanger pass through denitration exhaust gas entrance cigarette
Road connection；
Discharge unit includes air-introduced machine, discharge flue and ammonia removal tower；The hot fluid outlet ports of shell-and-tube heat exchanger and entering for air-introduced machine
Mouth is connected by denitration waste gas outlet flue；The outlet of air-introduced machine is connected with the entrance of ammonia removal tower by discharging flue.
2. acid washing rolled steel exhaust gas defluorinate denitrification apparatus according to claim 1, it is characterised in that: the caustic wash tower and water
Tower is washed to be made of anti-aging antiultraviolet PP plate.
3. acid washing rolled steel exhaust gas defluorinate denitrification apparatus according to claim 1, it is characterised in that: the level-one demister
It is arranged horizontally with second level demister.
4. acid washing rolled steel exhaust gas defluorinate denitrification apparatus according to claim 1, it is characterised in that: in the mixing module
It is provided with ammonia water spray gun.
5. acid washing rolled steel exhaust gas defluorinate denitrification apparatus according to claim 1, it is characterised in that: the low-temp reaction device
It is interior to be disposed with first row ash bucket, first row catalyst layer, secondary series ash bucket, secondary series catalyst by flue gas circulating direction
Layer, third column ash bucket and third column catalyst layer.
6. acid washing rolled steel exhaust gas defluorinate denitrification apparatus according to claim 1, it is characterised in that: pressed in the ammonia removal tower
Flue gas circulating direction sets gradually two layers of water spray layer and two layers of demisting layer.
7. acid washing rolled steel exhaust gas defluorinate denitrification apparatus according to claim 1, it is characterised in that: the demisting part is also
Including the first automatic hydrophobic pipeline and the second automatic hydrophobic pipeline；First automatic hydrophobic pipeline and the second automatic hydrophobic pipeline difference
Positioned at level-one demister and second level demister bottom.
8. acid washing rolled steel exhaust gas defluorinate denitrification apparatus according to claim 1, it is characterised in that: the collecting flue,
Connecting flue, buffering flue, horizontal flue, defluorinate exhaust gas entrance flue is FRP material, the defluorinate waste gas outlet cigarette
Road, high-temperature flue, mixing flue, denitration exhaust gas entrance flue, denitration waste gas outlet flue, discharge flue are carbon steel material.
9. acid washing rolled steel exhaust gas defluorinate denitrification apparatus according to claim 7, it is characterised in that: first automatic sparse
It is U-shaped curved there are two being respectively set in water pipeline and the second automatic hydrophobic pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820462334.4U CN208742254U (en) | 2018-04-03 | 2018-04-03 | Acid washing rolled steel exhaust gas defluorinate denitrification apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820462334.4U CN208742254U (en) | 2018-04-03 | 2018-04-03 | Acid washing rolled steel exhaust gas defluorinate denitrification apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208742254U true CN208742254U (en) | 2019-04-16 |
Family
ID=66052085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820462334.4U Withdrawn - After Issue CN208742254U (en) | 2018-04-03 | 2018-04-03 | Acid washing rolled steel exhaust gas defluorinate denitrification apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208742254U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108421383A (en) * | 2018-04-03 | 2018-08-21 | 中国联合工程有限公司 | A kind of acid washing rolled steel exhaust gas defluorinate denitrification apparatus and its operation method |
-
2018
- 2018-04-03 CN CN201820462334.4U patent/CN208742254U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108421383A (en) * | 2018-04-03 | 2018-08-21 | 中国联合工程有限公司 | A kind of acid washing rolled steel exhaust gas defluorinate denitrification apparatus and its operation method |
| CN108421383B (en) * | 2018-04-03 | 2023-11-07 | 中国联合工程有限公司 | Steel pickling waste gas defluorination and denitration device and operation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105862053B (en) | Hydrochloric acid exhausted liquid reclaiming process and system | |
| CN105879580B (en) | Hydrochloric acid exhausted liquid reclaiming process and system | |
| CN105887108B (en) | Hydrochloric acid exhausted liquid reclaiming process and system | |
| CN108636098A (en) | A kind of the minimum discharge purifier and its method of burning city domestic garbage flue gas | |
| CN108176221B (en) | Sintering flue gas temperature rising denitration device and sintering flue gas temperature rising denitration method | |
| CN105444195B (en) | Coal-fired flue-gas multi-pollutant cooperative processing method and its system | |
| CN108201781A (en) | Coke oven flue gas comprehensive treatment system based on sodium backbone method and low temperature SCR denitration | |
| CN2899917Y (en) | Smoke desulfurizing and denitrifying device by ammonia method | |
| CN210699488U (en) | Full-green clean production process equipment for glass kiln | |
| CN102309920B (en) | Method for removing NOx and SOx from fluid catalytic cracking (FCC) flue gas | |
| CN203886407U (en) | Flue gas purification and deep afterheat recycling integrated device | |
| CN108421383A (en) | A kind of acid washing rolled steel exhaust gas defluorinate denitrification apparatus and its operation method | |
| CN208742254U (en) | Acid washing rolled steel exhaust gas defluorinate denitrification apparatus | |
| CN110772915A (en) | Sintering flue gas SCR denitration and whitening system and process | |
| CN107238297B (en) | Sintering flue gas sub-prime directed circulation and online denitrating system | |
| CN113209823A (en) | Low-temperature SCR denitration device and process for waste gas from nonferrous metal Kaldo furnace smelting | |
| CN206253015U (en) | Low temperature is from heat exchange type SCR denitration reaction tower | |
| CN111804138A (en) | Biomass boiler flue gas denitration system and application process thereof | |
| CN207734844U (en) | A kind of middle low-temperature flue gas de-dusting de-nitration integrated | |
| CN113663466B (en) | Flue gas purification system and process for comprehensively utilizing heat | |
| CN211936311U (en) | Gas power generation boiler waste gas desulfurization and denitrification system | |
| CN2375370Y (en) | Smoke desulfurizing dust remover | |
| CN211302509U (en) | Sintering flue gas SCR denitration and de-whitening system | |
| CN107899399A (en) | A kind of low-temperature denitration technique of flue gas cleaning discharge | |
| CN209828704U (en) | Boiler flue gas can condense particulate matter and get rid of heat recovery system in coordination |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20190416 Effective date of abandoning: 20231107 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20190416 Effective date of abandoning: 20231107 |