CN109381967A - A kind of tail gas deodorization technological process for purifying - Google Patents
A kind of tail gas deodorization technological process for purifying Download PDFInfo
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- CN109381967A CN109381967A CN201811396787.2A CN201811396787A CN109381967A CN 109381967 A CN109381967 A CN 109381967A CN 201811396787 A CN201811396787 A CN 201811396787A CN 109381967 A CN109381967 A CN 109381967A
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- 238000000034 method Methods 0.000 title claims abstract description 46
- 230000008569 process Effects 0.000 title claims abstract description 31
- 238000004332 deodorization Methods 0.000 title claims abstract description 30
- 239000007789 gas Substances 0.000 claims abstract description 75
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 57
- 239000002904 solvent Substances 0.000 claims abstract description 55
- 238000010521 absorption reaction Methods 0.000 claims abstract description 35
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 33
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229910000037 hydrogen sulfide Inorganic materials 0.000 claims abstract description 18
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 16
- 238000001179 sorption measurement Methods 0.000 claims abstract description 12
- 239000002253 acid Substances 0.000 claims abstract description 11
- 230000002378 acidificating effect Effects 0.000 claims abstract description 8
- DNJIEGIFACGWOD-UHFFFAOYSA-N ethanethiol Chemical compound CCS DNJIEGIFACGWOD-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000005406 washing Methods 0.000 claims abstract description 6
- 125000001741 organic sulfur group Chemical group 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims description 25
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- 230000002745 absorbent Effects 0.000 claims description 8
- 239000002250 absorbent Substances 0.000 claims description 8
- 230000001877 deodorizing effect Effects 0.000 claims description 8
- 239000002781 deodorant agent Substances 0.000 claims description 7
- 238000012546 transfer Methods 0.000 claims description 7
- 150000001412 amines Chemical class 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 239000008213 purified water Substances 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 239000012528 membrane Substances 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 3
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 239000000498 cooling water Substances 0.000 claims description 3
- 239000000945 filler Substances 0.000 claims description 3
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 239000004571 lime Substances 0.000 claims description 3
- 238000010926 purge Methods 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 3
- 239000010865 sewage Substances 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 3
- 238000004140 cleaning Methods 0.000 abstract description 2
- 238000009418 renovation Methods 0.000 abstract description 2
- 239000003463 adsorbent Substances 0.000 description 8
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 7
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical group [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 6
- 230000007613 environmental effect Effects 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 230000002265 prevention Effects 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 4
- 238000000746 purification Methods 0.000 description 4
- PVXVWWANJIWJOO-UHFFFAOYSA-N 1-(1,3-benzodioxol-5-yl)-N-ethylpropan-2-amine Chemical compound CCNC(C)CC1=CC=C2OCOC2=C1 PVXVWWANJIWJOO-UHFFFAOYSA-N 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 3
- QMMZSJPSPRTHGB-UHFFFAOYSA-N MDEA Natural products CC(C)CCCCC=CCC=CC(O)=O QMMZSJPSPRTHGB-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229930195733 hydrocarbon Natural products 0.000 description 3
- 150000002430 hydrocarbons Chemical class 0.000 description 3
- 239000012071 phase Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000005864 Sulphur Substances 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000003915 air pollution Methods 0.000 description 2
- 239000012298 atmosphere Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000003205 fragrance Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000002045 lasting effect Effects 0.000 description 2
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- XOSXWYQMOYSSKB-LDKJGXKFSA-L water blue Chemical compound CC1=CC(/C(\C(C=C2)=CC=C2NC(C=C2)=CC=C2S([O-])(=O)=O)=C(\C=C2)/C=C/C\2=N\C(C=C2)=CC=C2S([O-])(=O)=O)=CC(S(O)(=O)=O)=C1N.[Na+].[Na+] XOSXWYQMOYSSKB-LDKJGXKFSA-L 0.000 description 2
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 description 1
- 241000251109 Hydrochara major Species 0.000 description 1
- LSDPWZHWYPCBBB-UHFFFAOYSA-N Methanethiol Chemical compound SC LSDPWZHWYPCBBB-UHFFFAOYSA-N 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 125000005360 alkyl sulfoxide group Chemical group 0.000 description 1
- 238000003556 assay Methods 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910021392 nanocarbon Inorganic materials 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000005501 phase interface Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000010563 solid-state fermentation Methods 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 230000009469 supplementation Effects 0.000 description 1
- 230000009967 tasteless effect Effects 0.000 description 1
- 150000003573 thiols Chemical class 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/90—Odorous compounds not provided for in groups B01D2257/00 - B01D2257/708
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Analytical Chemistry (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Treating Waste Gases (AREA)
Abstract
The present invention relates to industrial flow renovation technique field, especially a kind of tail gas deodorization technological process for purifying.This method is deodorized tail gas, head space gas and ground tank exhaust of the tail gas from acid water storage tank, including three-level combination deodorization, respectively washing, solvent absorption, ADSORPTION IN A FIXED BED for acidic water stripping device；Specific process flow are as follows: the stench tail gas of sour water tank discharge is discharged by the micro-positive pressure of itself from tank deck, initially enter the ammonia and a small amount of hydrogen sulfide of water scrubber removing 98%, subsequently into the concatenated secondary solvent absorption tower of two towers, hydrogen sulfide and organic sulfur is removed in depth, completes deodorising process；Three-stage fixed bed adsorption tower is as spare, and when solvent absorption comes into operation when something goes wrong, last purified gas is vented by an exhaust tube high position of 15m or more.This process has the features such as easy to operate, safe and reliable, compact-sized, occupied area is small, high degree of automation, easy to maintenance, and the time between overhauls(TBO) is long, operating cost is low, being capable of efficient cleaning of off-gas.
Description
Technical field
The present invention relates to industrial flow renovation technique field, especially a kind of tail gas deodorization technological process for purifying.
Background technique
With China's industrialization, the deep propulsion of urbanization, energy consumption continues to increase, prevention and control of air pollution pressure
Lasting to increase, more and more countries constrain atmosphere pollution to formulate tightened up legal provision, " odorant pollutant discharge mark
It is quasi- " be exactly to control pollution of the odorant pollutant to atmosphere to implement " The Law of the People's Republic of China on the Prevention and Control of Atmospheric Pollution ", protection with
Improve environment and formulates.The Air Pollution Prevention Law is revised, in 2000 in 2015 in succession in China.2014 countries
" Law on Environmental Protection " is revised again.
Pillar industry of the Hua Jin group as Panjin economy, pays much attention to always environmental protection.For " clear water blue sky " ring
Plan is protected, efforts at environmental protection highlight three emphasis, first is that mainly including and national ring in terms of pollution reduction and qualified discharge
The signed liability statement in guarantor portion specifies total amount emission reduction project；Second is that in terms of improving Work places and enterprise's surrounding enviroment quality, it is main
It to include petroleum vapor recovery, peculiar smell improvement, the volatile organic matter Detection & Controling of uncontrollable discharge source, noise abatement；Third is that in ring
It mainly include at environmental risk prevention and control, underground water pollution prevention and control, Solid state fermentation, ecological protection and solid waste in terms of protecting Control of Hidden
It sets up and sets.This be environment protection treating action and enterprise largest in Hua Jin group history disposably put into it is most intensive, be related to model
Enclose maximum special projects to address serious environmental problems action." clear water blue sky " Environmental Protection Plan is in lasting progress.
The acid water storage tank tank deck tail gas deodorization of acidic water stripping device in refinery branch company sulphur unit, original design are
Tail gas discharges after two stage fixed-bed absorption through exhaust tube high point.Find that ammonia content is higher in tail gas in operation, to subsequent suction
Attached dose is affected, and the follow-up processing flow of the tail gas is transformed at 2014, increases an acid before fixed bed
Property water absorption tower, remove tail gas in most of ammonia.Scene reflection at present, since ammonia in tail gas and hydrogen sulfide equal size are higher
(ammonia: 500ppm (wt)；Hydrogen sulfide: 700ppm (wt)), existing apparatus treatment effect is bad, and there are stink, and adsorbent in scene
Replacement is frequent.
Currently, vent gas treatment is mainly handled using directly burning and adsorbent method.
The direct burning of tail gas is to decompose the direct high-temp combustion of combustible in tail gas, can generate titanium dioxide in combustion process
Carbon, water, oxysulfide etc., gas can be discharged in the range of meeting discharge standard.This kind of method requires supplementation with certain
Fuel combustion supporting.In general, refinery can send the tail gas to incinerator or heating furnace burn-up.
The absorption method of tail gas mainly uses solid absorbent, and sulfide and hydrocarbon in tail gas etc. can be adsorbed on the micro- of adsorbent
In hole surface, to achieve the purpose that cleaning of off-gas, the tail gas of purification can be discharged in the range of meeting discharge standard.No
It is different with adsorption capacity of the adsorbent to hydrocarbon and various sulfide, it needs to carry out setting for adsorbent according to the different of absorbate
It sets.Such method treatment effeciency is high, easy to operate, but when it is adsorbent bed reach breakthrough point when need replacing adsorbent.If
Hydrocarbon or sulfide content in gas is higher, then the consumption of adsorbent is also higher, correspondingly increases operating cost.
Summary of the invention
A kind of tail gas deodorization technological process for purifying, this method are deodorized tail gas for acidic water stripping device, and the tail gas comes
It is vented from the head space gas and ground tank of acid water storage tank, including three-level combination deodorization, respectively washing, solvent absorption, fixed bed
Absorption；Specific process flow are as follows: the ammonia and a small amount of hydrogen sulfide for initially entering water scrubber removing 98% are connected subsequently into two towers
Secondary solvent absorption tower, hydrogen sulfide and organic sulfur is removed in depth, completes deodorising process；Three-stage fixed bed adsorption tower is as standby
With when solvent absorption comes into operation when something goes wrong, last purified gas is vented by an exhaust tube high position of 15m or more.
Using poor amine liquid as deodorant in the secondary solvent absorption tower.
The secondary solvent absorption tower and water storage tank, solvent tank, water-circulating pump, solvent circulating pump connection；Purified water, deodorization
Agent is recycled by water storage tank, solvent tank, water-circulating pump and solvent circulating pump, internal circulating load 25-30m3/h。
Secondary solvent absorption tower air inlet forms tiny structure using injection flow structure, using forced mixer, ultra-fine
Spraying and liquid membrane contactor filler combination absorbent assembly, cocurrent absorption technique.
Control pressurer system is arranged in secondary solvent absorption tower intermittently operated, when stench tail gas pressure reaches 0.6kPa,
Pneumatic operated valve is opened, while starting water pump, solvent pump, carries out deodorization operation；When pressure is lower than 0.3kPa, all follow is automatically closed
Ring pump；Starting, opening and closing pressure is adjustable between 0.3-1.3kPa, and the DCS system of access device.
The water scrubber, absorption tower use tower bottom circulating pump, and tower bottom is equipped with analytical sampling mouth.
Secondary solvent absorb the bottom of the tower setting liquidometer and condensate drain mouth, lime set are periodically emitted into underground oil sewage network.
Cooling system is arranged in secondary solvent absorption tower bed, and temperature alarming is arranged, when bed temperature reaches 65 DEG C
When, manually opened nitrogen valve purges bed, or opens bed cooling water temperature system.
The three-stage fixed bed adsorption tower includes two deodorizing towers, using short bed structure and proprietary gas distributor, and
Change airintake direction by valve transfer, 2 deodorizing towers can both be operated in parallel, can also serial operation or 1 to open 1 standby, and realize not
It rests and changes agent.
Beneficial effects of the present invention:
(1) pass through a kind of tail gas deodorization technological process for purifying of the application, the sour water tank of sulphur acidic water stripping device
The tail gas of tank deck combines deodorizing technology by washing, solvent absorption, ADSORPTION IN A FIXED BED three-level, and the ammonia in stench tail gas is removed in depth
And sulfide.Tail gas air inflow is 300m3/ h, after the processing of the device set by this process, capacity 280m3/ h, in tail gas
Hydrogen sulfide stripping rate >=99% (H2S is 0.02kg/h)；Ammonia removal rate >=98% (NH3For 0.18kg/h), as a result it is superior to existing
Technology.Vent gas treatment heel row inflator height is by 15 meters of designs, and tail gas meets national " odor pollution discharge standard " after processing
(GB14554-1993) requirement (H2S is 0.33kg/h, NH3It, can be with qualified discharge for 4.9kg/h).
(2) a kind of tail gas deodorization purification process of the present invention, using sled blockization installation, peace advanced, easy to operate with technique
Complete reliable, compact-sized, occupied area small (10000 × 7000 × 5000mm), high degree of automation, easy to maintenance, maintenance week
The features such as phase is long, operating cost is low.
(3) deodorizing system uses control pressurer system, and equipment realizes automatic operation after increasing control system, makes acidity
Water pot pressure inside the tank remains slight positive pressure state, has not only saved the energy but also has saved manpower, but also has risen to sour water tank
Protective effect.
(4) a kind of tail gas deodorization technological process for purifying thoroughly solves former adsorption tanks adsorption cycle is short, operating cost is high etc.
Problem, while alleviating the labor intensity of worker.
Detailed description of the invention
The present invention will be further described below with reference to the drawings.
Fig. 1 is a kind of partial process view of tail gas deodorization purification process of the present invention.
Specific embodiment
Embodiment 1
It is head space gas and ground tank exhaust from acid water storage tank that acidic water stripping device, which is deodorized tail gas,.
The specification of acid water storage tank involved in the present embodiment:3000m3；Quantity 2.Behaviour
Make temperature: 40 DEG C, design temperature: 80 DEG C；Operating pressure: -50~200mmH2O, design pressure: 5.88 × 10-3MPaG/-
490Pa；Into each acid water storage tank acid water maximum stream flow: 120m3/h.Major impurity is shown in Table 1 in acid water:
The acid water impurity of table 1 forms table
Ground tank specification: 0261-V-405 specification φ 1400 × 6770 × 10, emptying gas export WN50-150SCH80RF
HG/T20615；Medium: rich solvent/rich solvent flashed vapour；
0256-V-108 specification φ 1400 × 6766 × 8, emptying gas export WN50-150 SCH80RF HG/T20615.
Medium: rich solvent/rich solvent flashed vapour；
Tail gas maximum: 300Nm3/h.It is largely nitrogen in tail gas since sour water tank is sealed using nitrogen, it is main to form
It is shown in Table 2:
2 tail gas of table forms table
The present embodiment combines deodorizing technology using washing+solvent absorption+ADSORPTION IN A FIXED BED three-level, and stench tail gas is removed in depth
In ammonia and sulfide process, i.e., sour water tank discharge stench tail gas by itself micro-positive pressure from tank deck be discharged, first into
The ammonia and a small amount of hydrogen sulfide for entering the removing of water scrubber 1 98% are removed in depth subsequently into the concatenated secondary solvent absorption tower 2 of two towers
Hydrogen sulfide and organic sulfur complete deodorising process, and the three-stage fixed bed conduct of adsorption tower 3 is spare, when solvent absorption is thrown when something goes wrong
With.Purified gas passes through exhaust tube (15m or more) high-order emptying.
Secondary solvent, which is absorbed, is used as absorbent using MDEA (poor amine liquid), removes the hydrogen sulfide of 70-80%.
Purified water, deoderized solvent (amine liquid) are made by water storage tank 4, solvent tank 5, water-circulating pump 6, the circulation of solvent circulating pump 7
With internal circulating load 25-30m3/h。
2 air inlet of solvent absorption tower forms tiny structure, using forced mixer, ultra-fine spray using injection flow structure design
Mist and liquid membrane contactor filler combination absorbent assembly, cocurrent absorption technique, pressure drop is very low, is not required in addition configure to vacuumize and is
Control pressurer system is arranged in system, solvent absorption tower 2, when stench tail gas pressure reaches 0.6kPa, opens pneumatic operated valve, while starting water
Pump, solvent pump, carry out deodorization operation；When pressure is lower than 0.3kPa, all circulating pumps are automatically closed.Starting, opening and closing pressure exist
It is adjustable between 0.3-1.3kPa, and the DCS system of access device.
2 bottom of solvent absorption tower setting liquidometer and condensate drain mouth, lime set are periodically emitted into underground oil sewage network.
Cooling system is arranged in 2 bed of solvent absorption tower, and temperature alarming (height alarm) is arranged, when bed temperature reaches 65 DEG C
When, manually opened nitrogen valve purges bed, or opens bed cooling water temperature system.Shown in process flow Fig. 1 of the invention:
The deodorization purification process of the invention patent uses one-stage water wash absorbing and removing ammonia, and ammonia is the maximum gas of solubility, and 1
The water of volume can dissolve the ammonia of 700 volumes, wash unit using the self-produced purified water of acidic water stripping device as absorbent, absorb
98% or more ammonia and a small amount of hydrogen sulfide.It is saturated ammonia-containing water and returns to sour water tank, do not discharge.
Using second level absorbing and removing hydrogen sulfide
MDEA (lean solution) solvent that second level Absorption Desulfurization unit is used using the existing solvent desulphurization system of sulphur unit as
The MDEA (rich solution) of absorbent, the hydrogen sulfide of removal 80% or so, saturation returns to solvent regeneration system, does not discharge, does not generate two
Secondary pollution.
Using three-stage fixed bed deodorization
Using fixed bed reactors and DSC-05 high sulfur capacity deodorant deep sulfide removing.
DSC-05 deodorant using bulky grain, the nano-carbon material of high-specific surface area and metal oxide as carrier, live by load
Hydrogen sulfide, can be oxidized at normal temperature simple substance sulphur, mercaptan, sulfide oxidation generate non-toxic and tasteless alkane by property component and catalyst
Base sulfonic acid and alkyl sulfoxide reach deodorization purpose.Deodorant Sulfur capacity is up to 30%, thiol conversion 95%.Deodorant not iron content, no
Ferrous sulfide can be generated, spontaneous combustion occurs.
The present embodiment is connect using washing and solvent absorption tower using strength injector mixer, ultra-fine spray absorber and liquid film
Tentaculum efficient combination absorbent assembly, foul gas is drawn, while carrying out strong gas-liquid mass transfer.
Strength injector mixer can generate huge shearing force under liquid at high speed spray regime, and liquid is torn into micron
The liquid film and drop of grade form the phase interface quickly updated, and the traditional tower of gas-liquid mass transfer speed ratio improves 1~2 order of magnitude,
Microcosmic mixing and the mass transport process of unit equipment volume are greatly strengthened, while generating the tiny structure of 0~-0.5kPa, will be disliked
Odour is drawn from storage tank, since negative pressure is lower, will not take out flat storage tank.The fogdrop diameter that super-fine atomization device generates can reach micro-
Meter level, amount of droplets increase by 200,000 times than conventional nozzle.Gas liquid interfacial area is big, good absorption effect, and water consumption can reduce by 50 times
More than, and pressure drop is extremely low；Liquid membrane contactor is a kind of completely new mass transfer apparatus, by the very thin groups of metal filaments of multiple groups at, due to
By surface specially treated, metallic surface tension is changed, liquid is made to be far longer than common gold to the adhesive force of wire wall
Belong to silk, formed uniformly, fine and close, continuous liquid phase film, so that the drop of small size be made to be extended to the liquid film of very big area, gas-liquid
The way of contact of two-phase is no longer the sphere-contact between conventional distributing droplet, but special non-dispersive formula liquid film and gas
Plane contact between body.In addition, the frictional force between liquid film keeps liquid film thinner when gas is flowed along wire, two
Planar film contact between phase completes deodorization reaction in a very short period of time, and mass-transfer efficiency greatly improves.Since absorption process is adopted
With forward flow process, mass transfer is completed without mutually dispersing, and avoids entrainment, channel, easily blocking, and pressure drop substantially reduces.
Three-stage fixed bed deodorization in the present embodiment using short bed structure and proprietary gas distributor, and passes through valve
Switching changes airintake direction, and 2 deodorizing towers can both be operated in parallel, can also serial operation or 1 to open 1 standby, and realize not parking change
Agent.
The water scrubber 1, solvent absorption tower 2 of the present embodiment are all made of tower bottom circulating pump, and tower bottom is equipped with analytical sampling mouth.According to
Assay sets pump discharge flow and water scrubber, absorbing tower liquid-level interlock as a result, regular replenishment purified water and solvent.This
Pump selects Shenlan Pump Industry Co., Ltd., Dalian's centrifugal pump, and each two, one opens one standby, and separate unit flow is 35m3/ h, lift 30m,
Power is 7.5kW.
Liquid in the present embodiment after deodourizing all passes through pipeline and returns in corresponding water tank and system；Saturation contains ammonia
Waste water is pumped back into sour water tank, saturation amine liquid (rich solution) is pumped to amine liquid regenerating unit, useless deoderized solvent is sent to sour water tank
After remove acidic water stripping device.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be readily apparent to those skilled in the art, as defined herein
Conventional method can be realized in other embodiments in the case where not departing from the marrow or range of invention.Therefore, the present invention will
It will not be intended to be limited to the embodiments shown herein, but to accord with method disclosed herein and features of novelty is consistent
Widest scope.
Claims (9)
1. a kind of tail gas deodorization technological process for purifying, this method is deodorized tail gas for acidic water stripping device, and the tail gas comes from
The head space gas and ground tank of acid water storage tank are vented, which is characterized in that are combined and be deodorized including three-level, respectively washing, solvent are inhaled
It receives, ADSORPTION IN A FIXED BED；Specific process flow are as follows: the stench tail gas of sour water tank discharge is arranged by the micro-positive pressure of itself from tank deck
Out, the ammonia and a small amount of hydrogen sulfide for initially entering water scrubber removing 98%, it is deep subsequently into the concatenated secondary solvent absorption tower of two towers
Degree removing hydrogen sulfide and organic sulfur, complete deodorising process；Three-stage fixed bed adsorption tower is as spare, when solvent absorption goes wrong
When come into operation, last purified gas is vented by an exhaust tube high position of 15m or more.
2. a kind of tail gas deodorization technological process for purifying according to claim 1, which is characterized in that the secondary solvent absorbs
Using poor amine liquid as deodorant in tower.
3. a kind of tail gas deodorization technological process for purifying according to claim 1, which is characterized in that the secondary solvent absorbs
Tower and water storage tank, solvent tank, water-circulating pump, solvent circulating pump connection；Purified water, deodorant are followed by water storage tank, solvent tank, water
Ring pump and solvent circulating pump are recycled, internal circulating load 25-30m3/h。
4. a kind of tail gas deodorization technological process for purifying according to claim 1, which is characterized in that the secondary solvent absorbs
Tower air inlet forms tiny structure, using forced mixer, super-thin spray and liquid membrane contactor filler combination using injection flow structure
Absorbent assembly, cocurrent absorption technique.
5. a kind of tail gas deodorization technological process for purifying according to claim 1, which is characterized in that the secondary solvent absorbs
Tower intermittently operated, be arranged control pressurer system, when stench tail gas pressure reach 0.6kPa when, open pneumatic operated valve, while start water pump,
Solvent pump carries out deodorization operation；When pressure is lower than 0.3kPa, all circulating pumps are automatically closed；Starting, opening and closing pressure are in 0.3-
It is adjustable between 1.3kPa, and the DCS system of access device.
6. a kind of tail gas deodorization technological process for purifying according to claim 5, which is characterized in that the water scrubber, absorption
Tower uses tower bottom circulating pump, and tower bottom is equipped with analytical sampling mouth.
7. a kind of tail gas deodorization technological process for purifying according to claim 1, which is characterized in that the secondary solvent absorbs
Tower bottom setting liquidometer and condensate drain mouth, lime set are periodically emitted into underground oil sewage network.
8. a kind of tail gas deodorization technological process for purifying according to claim 1, which is characterized in that the secondary solvent absorbs
Cooling system is arranged in tower bed, and temperature alarming is arranged, and when bed temperature reaches 65 DEG C, manually opened nitrogen valve purges bed
Layer, or open bed cooling water temperature system.
9. a kind of tail gas deodorization technological process for purifying according to claim 1, which is characterized in that the three-stage fixed bed suction
Attached tower includes two deodorizing towers, changes airintake direction using short bed structure and proprietary gas distributor, and by valve transfer,
2 deodorizing towers can both be operated in parallel, and serial operation or 1 can also open 1 standby, and realize not rest and change agent.
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| CN201811396787.2A CN109381967A (en) | 2018-11-22 | 2018-11-22 | A kind of tail gas deodorization technological process for purifying |
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| CN201811396787.2A CN109381967A (en) | 2018-11-22 | 2018-11-22 | A kind of tail gas deodorization technological process for purifying |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113858576A (en) * | 2021-11-04 | 2021-12-31 | 辽宁北方华锦五洲化工工程设计有限公司 | Devolatilization recovery method and recovery system of ABS extruder |
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Application publication date: 20190226 |