CN106955563A - Waste gas processing method containing EO and PO - Google Patents
Waste gas processing method containing EO and PO Download PDFInfo
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- CN106955563A CN106955563A CN201710179353.6A CN201710179353A CN106955563A CN 106955563 A CN106955563 A CN 106955563A CN 201710179353 A CN201710179353 A CN 201710179353A CN 106955563 A CN106955563 A CN 106955563A
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- 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
- B01D53/1406—Multiple stage absorption
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- 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
- B01D53/1425—Regeneration of liquid absorbents
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/09—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by hydrolysis
- C07C29/10—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by hydrolysis of ethers, including cyclic ethers, e.g. oxiranes
- C07C29/103—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by hydrolysis of ethers, including cyclic ethers, e.g. oxiranes of cyclic ethers
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/09—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by hydrolysis
- C07C29/10—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by hydrolysis of ethers, including cyclic ethers, e.g. oxiranes
- C07C29/103—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by hydrolysis of ethers, including cyclic ethers, e.g. oxiranes of cyclic ethers
- C07C29/106—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by hydrolysis of ethers, including cyclic ethers, e.g. oxiranes of cyclic ethers of oxiranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/50—Combinations of absorbents
- B01D2252/504—Mixtures of two or more absorbents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/704—Solvents not covered by groups B01D2257/702 - B01D2257/7027
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- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Abstract
The present invention relates to a kind of waste gas processing method containing EO and PO, mainly solve to wash that water consumption is big in the prior art, the intractable problem of waste water after washing.The present invention is by using a kind of waste gas processing method containing EO and PO, and waste gas containing EO/PO enters an effect waste gas absorption tower T 101 and absorbed, and top of tower waste gas, which enters two, imitates waste gas absorption tower T 102 and washed, and waste gas is from tower top emptying up to standard after washing；The tower bottoms of one effect waste gas absorption tower T 101 enters an effect hydration reactor R 101 and reacted, and reacted lean solution is back to the tower tops of an effect waste gas absorption tower T 101 by the rear portions of heat exchanger E 101；The tower reactor liquid phases of two effect waste gas absorption tower T 102 are partly into two effect hydration reactor R 102 and reacted, the EO/PO in waste water is removed through catalysis hydration, reacted lean solution delivers to the tower tops of two effect exhaust gas washing tower T 102 technical scheme after being cooled down through lithium bromide refrigerator U 101 preferably solves above mentioned problem, available in exhaust-gas treatment containing ethylene oxide/propylene oxide.
Description
Technical field
The present invention relates to a kind of waste gas processing method containing EO and PO.
Background technology
With national society's rapid economic development, country is further to environmental requirement to improve.Along with every environmental regulation
Appearance, " people-oriented, environmental protection " is the only way which must be passed of Issues and Crucial Practices of Contemporary Enterprises and social development.
How economical rationality tail gas progress is handled be environmental protection an important directions, meet the energy resource structure of China with
Development strategy.The present invention relates to a kind of processing method to the waste gas containing ethylene oxide/propylene oxide, mainly solve in conventional art
There is ethylene oxide/propylene oxide washing insufficient, washing consumption is big, and is washed containing oxirane (EO)/expoxy propane (PO)
Wash the problems such as wastewater treatment is difficult.According to《GB 31571-2015 petro chemical industry pollutant emission standards》It is required that, in waste gas
The limit value of oxirane and expoxy propane is respectively 0.5,1mg/m3, existing technology or is extremely difficult to this requirement, Huo Zhehui
Form secondary pollution.For example, East China University of Science " http://www.docin.com/p-869252916.html " is disclosed to be adopted
The method being hydrated with sulfuric acid catalysis, adds 0.5~1.0% dilute sulfuric acid as catalyst, 50~70 using aqueous solution of ethylene oxide
DEG C, reaction generation ethylene glycol under 9.8~19.6KPa reaction conditions, reaction product need to be neutralized with alkali lye.The reaction needs to use sulphur
Although acid and NaOH, acid-base pair EO hydrations are by obvious catalytic action, inorganic acid catalyst can cause carbon steel equipment corrosion,
And inorganic base catalyst can produce some accessory substances.Inorganic salts are introduced in washings simultaneously, brine waste is generated, to follow-up useless
The difficulty height of water process operation, power consumption are big, do not meet the environmental requirement of economical rationality.
Physical Absorption method：Oxirane waste gas is introduced into absorbing liquid and purified, by after absorbing liquid saturation through heating,
Parsing, is condensed, and is reclaimed；This law is larger suitable for its amount, and waste gas component is single, and concentration is low, the low gas of temperature, but needs configuration
Heating parsing retracting device, equipment volume typically than larger, invests higher, and oxirane property is active, and absorbing liquid is subsequently located
Reason is difficult.,, can be certainly also with height inflammability in addition to high toxicity because oxirane is a kind of hazardous chemical component
It is dynamic decompose and with multiple compounds (including itself) reaction, and these reactions generally have strong exothermicity.Due to this
, had there is multiple major accident in EO/EG (ethylene glycol) and EO derived product process industries in a little characteristics.
EO can meet that water is fully miscible, and (and under atmospheric pressure) has the mid-term from oxirane/aqueous mixtures in atmosphere
There is inflammability, unless carried out more than 22 times dilutions to EO (according to volume).In closed system, such as gutter, it may be necessary to dilute
The multiple released is 100 times, so can just form the mixture for not supporting burning.As using in water absorption method processing tail gas
EO/PO (expoxy propane), to meet safety requirements, the consumption demand to washings is very big, causes energy loss.Meanwhile, EO makees
For active chemical agent, its aqueous solution enters drainage, may be reacted with the material of other in drainage (acids,
Some amines, alkali metal hydroxide, such as bleaching clay of the solid in superfine state and rust etc.).Cause danger.Meanwhile, EO
And its aqueous solution is as good bactericide, biochemical pond and strain may be impacted.
Absorption method：Because activated carbon is non-polar adsorbent, and oxirane is nonpolar organic compound, so epoxy
Ethane is easily tightly held by activated carbon.Oxirane active charcoal absorption unexpectedly, can reach more than 95% purifying rate, equipment is simple,
Invest small, but the relative replacing of activated carbon is frequent, adds handling, transports, the working procedure such as replacing, and the activity containing oxirane
Carbon subsequent treatment is difficult, causes operating cost to increase, economy is not good enough.
Direct hydration method：It is legal that direct hydration method is also referred to as oxirane pressure (hydraulic) water.By water and oxirane using mol ratio as
22：1 solution, in shell and tube reactor, with 150~200 DEG C of operating condition, is hydrated under conditions of 1.5~2.5MPa
Reaction generation EG, accessory substance DEG, TEG etc..This method reaction condition is relative complex, and energy consumption is big.Economical rationality, energy-conservation are not met
The requirement of environmental protection.
Catalytic hydration：For that can be corroded using simple acid base catalysator, contaminated equipment can also generate some other pair
Product.And the energy consumption of direct hydration method is too high, waste liquid containing ethylene oxide/propylene oxide is handled using catalytic hydration herein, such as
A kind of method of the producing glycol by virtue of hydration of ethylene oxide proposed in patent CN201010147789.Can be in low temperature, lower pressure
Under, ethylene oxide/propylene oxide generates ethylene glycol/propylene glycol under catalyst action.Accessory substance is DEG/DPG etc..Reaction production
Thing and accessory substance are safe and reliable, have no toxic side effect, no Fire risk analysis.Due to reaction product and accessory substance pair in waste liquid
EO/PO has after good assimilation effect, reaction that waste liquid is recyclable to change utilization.This method has washing water use efficiency high, energy consumption
Low, waste liquid is disposable after washing, the characteristics of plant running safety and stability.
Reaction product ethylene glycol recoverable, ethylene glycol can be used for polyester resin, including fiber, film and engineering plastics
Production, cooling agent and antifreezing agent can be directly used as, at the same be also production alkyd resin, plasticizer, paint, adhesive, surface
The essential material of the products such as activating agent, explosive and capacitor electrolyte, is a kind of very important aliphatic dihydroxy alcohol.
The content of the invention
The technical problems to be solved by the invention, which are that washing water consumption is big in the prior art, waste water is intractable after washing asks
There is provided a kind of new waste gas processing method containing EO and PO for topic.This method have washing water consumption it is small, washing after waste water it is disposable
Advantage.
To solve the above problems, the technical solution adopted by the present invention is as follows：A kind of waste gas processing method containing EO and PO, bag
Include following operating mode：
(1) nominal situation one：Waste gas containing EO/PO enters an effect waste gas absorption tower T101 and absorbed, top of tower waste gas warp
It is discharged into two effect waste gas absorption tower T102 after absorption to be washed, waste gas reaches that environmental emission standard is discharged into air after washing；One effect
The discharging of exhaust gas washing tower T102 bottom wash rich solution is pumped into an effect hydration reactor R101 through an effect tower waste water pump P101 and carried out
Reaction, the EO/PO in waste water is removed through catalysis hydration, and lean solution feeding heat exchanger E101 is recycled to after being cooled with circulating water after reaction
One effect waste gas absorption tower top, is recycled as absorbing liquid；Two effect waste gas absorption tower T102 make to an effect washing column overhead waste gas
Absorbed again with low temperature chilled water, air is emitted into after removing the micro EO/PO in tower top waste gas；Two effect waste gas absorption absorption towers
Tower reactor rich solution is pumped to two effect water through two effect tower waste water pump P102 and reactor R102 is reacted, and waste water is removed through catalysis hydration
In EO/PO after, reaction lean solution through lithium bromide refrigerator U101 cool down after be recycled to two effect exhaust gas washing tower tower tops as absorption
Liquid is recycled；When EO/PO too high levels in chilled water, when causing the discharging of T102 waste gas undesirable, by part low temperature cold
Freeze water and squeeze into progress catalytic reaction processing in the effect scrubbing tower washings of upstream one, while supplementing equivalent low temperature chilled water to meet
Two effect tower clean results meet environmental requirement；With the binary determining alcohol rise that catalysis hydration is generated in circulating absorption solution, work as suction
, will in an effect waste gas absorption tower overhead reflux line and the two effect hydration reactor ways of escape when receiving dihydric alcohol excessive concentration in recycling waste water
The high containing alcohol waste water in part is discharged into sewage disposal system in factory, and the supplement equivalent fresh water in tower top cooling line；
(2) the complete EO/PO of unreacted is contained in nominal situation two, an effect scrubbing tower washings：
Waste gas containing EO/PO enters an effect waste gas absorption tower T101 and absorbed, and an effect waste gas absorption tower T101 and two effects are useless
Aspiration tower T102 is atmospheric operation, and top of tower waste gas is discharged into two effect waste gas absorption tower T102 after absorption and washed, washed
Wash rear waste gas and be discharged into air, an effect exhaust gas washing tower T102 bottom wash rich solution discharging is pumped into one through an effect tower waste water pump P101
Effect hydration reactor R101 is reacted, and the EO/PO in waste water is removed through catalysis hydration, lean solution feeding heat exchanger E102 after reaction
Heat exchange is carried out, then is recycled to an effect waste gas absorption tower top after being cooled with circulating water by E101, is recycled as absorbing liquid；
Two effect waste gas absorption tower T102 to one effect washing column overhead waste gas is absorbed again using low temperature chilled water, remove tower top waste gas in compared with
The EO/PO of volume, to ensure that discharge waste gas reaches ring requirement；Two effect waste gas absorption absorption tower tower reactor rich solutions are through two effect tower waste water pumps
P102 is pumped to heat exchanger E102 preheatings, and chilled water feeding two imitates water after preheating and reactor R102 is reacted, through catalytic water
Close after the EO/PO in removing waste water, reaction lean solution is recycled to two effect exhaust gas washing tower towers after being cooled down through lithium bromide refrigerator U101
Top is recycled as absorbing liquid；With the binary determining alcohol rise that catalysis hydration is generated in circulating absorption solution, work as absorption cycle
, will part height in an effect waste gas absorption tower overhead reflux line and the two effect hydration reactor ways of escape in waste water during dihydric alcohol excessive concentration
Containing alcohol waste water is discharged into sewage disposal system in factory；
(3) damage, worst cold case：
The one effect reacted lean solutions of hydration reactor R-101 are only back to an effect waste gas absorption tower after heat exchanger E-101
T-101 tower tops, other same nominal situations of flow, under worst cold case, switching heat exchanger E102 enters cooling water, cold using circulating
But water is preheated to R-102 reactor feeds.
In above-mentioned technical proposal, it is preferable that an effect waste gas absorption tower T-101 and two effect waste gas absorption tower T-102 are often
Press operation.
In above-mentioned technical proposal, it is preferable that an effect waste gas absorption tower T-101 tower reactors, an effect waste gas absorption tower T-101 tower tops
Discharge pipe, two effect waste gas absorption tower T-102 tower reactors, two, which is imitated, be equipped with protection nitrogen on waste gas absorption tower T-102 vent lines
Pipeline interface.
In above-mentioned technical proposal, it is preferable that be back to the pipeline of an effect waste gas absorption tower T-101 tower tops, be back to two effects
The pipeline of waste gas absorption tower T-102 tower tops makes up line interface provided with fresh water.
In above-mentioned technical proposal, it is preferable that the two effect reacted lean solutions of hydration reactor R-102, by weight, 0~
20% removes Waste Water Treatment；The material of an effect waste gas absorption tower T-101 tower tops is back to, by weight, 0~20% removes waste water
Processing system.
In above-mentioned technical proposal, it is preferable that one imitates on waste gas absorption tower T-101 exhaust gas inlet line, two effect waste gas are inhaled
Receive and be equipped with spark arrester on tower T-102 tower top vent lines.
In above-mentioned technical proposal, it is preferable that the hydration in an effect hydration reactor R-101, two effect hydration reactor R-102
Resinae composite metal catalyst (such as patent No. that catalysts are provided using Shanghai Petroleum Chemical Engineering Institute
CN201410429127, CN201410097856, CN201310512392, CN201310515574, CN201010261756,
CN201010261760, CN201010261756, CN201010261758, CN20101026174, CN200410066632,
CN200410052720 etc. and be not limited to above patent)；One effect hydration reactor R-101, two imitate the anti-of hydration reactor R-102
Condition is answered to be：10 DEG C~125 DEG C of reaction temperature, reaction pressure 0.05MPa~0.15MPa, residence time 3.5-8min enter
The mass ratio of catalyst is 0.1~1 in oxirane and hydration reactor in hydration reactor：1, water and oxirane enter
It is 2~400 to expect mol ratio:1；One effect waste gas absorption tower T-101 operating condition is：Water is absorbed with entering in waste gas absorption tower
The mol ratio of oxirane is 2~400:1, it is -15~70 DEG C to absorb coolant-temperature gage, normal pressure, and theoretical cam curve is 3~30, is entered
The volume ratio of protection nitrogen and waste gas in waste gas absorption tower is 0.3~0.7：1；Two effect waste gas absorption tower T-102 operation bar
Part is：It is 2~400 to absorb water with entering the mol ratio of the oxirane in waste gas absorption tower:1, it is -15~50 to absorb coolant-temperature gage
DEG C, normal pressure, theoretical cam curve is 3~30, is 0.3~0.7 into the protection nitrogen and the volume ratio of waste gas in waste gas absorption tower：
1。
In above-mentioned technical proposal, it is highly preferred that an effect hydration reactor R-101, two effect hydration reactor R-102 reaction
Condition is：The raw materials components mole ratio of 25 DEG C~120 DEG C of reaction temperature, water and oxirane is 4~200:1；One effect waste gas absorption
Tower T-101 operating condition is：It is 4~200 to absorb water with entering the mol ratio of the oxirane in waste gas absorption tower:1, often
Pressure, theoretical cam curve is 8~15；Two effect waste gas absorption tower T-101 operating conditions are：Water is absorbed with entering in waste gas absorption tower
Oxirane mol ratio be 4~200:1, normal pressure, theoretical cam curve is 8~20.
It is an object of the invention to provide a kind of waste gas processing method containing ethylene oxide/propylene oxide, utilized with washings
Rate is high, total energy approach, reduces energy consumption, waste liquid is disposable after washing, plant running safety and stability, the recyclable profit of accessory substance
With the characteristics of increasing economic benefit.Given birth to it is a feature of the present invention that the waste water containing EO/PO after washing is reacted by catalysis hydration
Into di-alcohols, EO/PO can be made the waste water after hydration reaction equally with good assimilation effect due to glycol solution
Absorption is circulated for cleaning solution and is reacted again.The washing water consumption for solving the existing generally existing of waste gas containing EO/PO is big, washes
The problems such as rear waste water is difficult is washed, Ion exchange resins catalyst can be used to be carried out under lower temperature and pressure for this technique
Reaction, saves plant energy consumption.The present invention is that the present invention is reduced by catalysis hydration reaction with the main distinction of prior art
EO/PO content in washings, and it is circulated washing using washings after reaction.Not only reduce at potential safety hazard, waste water
The problems such as reason is difficult, improves containing alcohol ratio in waste water, is easy to recycle, even more greatly reduces washing water consumption, improves
Economic benefit, it is considered to which multi-state is operated, and advantageously reduces energy consumption, and react (exothermic reaction) lean solution conduct afterwards with catalysis hydration
Thermal source is two effect cleaning solution heat supplies, has reclaimed the energy of system, energy-saving, achieves preferable technique effect.
Brief description of the drawings
Fig. 1 is the schematic flow sheet (solid line is walked in logistics) of the method for the invention.
Fig. 2 is the schematic flow sheet under worst cold case of the present invention (solid line is walked in logistics).
In Fig. 1, the effect waste gas absorption towers of T-101 mono-；T-102 bis- imitates waste gas absorption tower；R-101 mono- imitates hydration reactor；R-
102 2 effect hydration reactors；P-101 mono- imitates waste water pump；P-102 bis- imitates waste water pump；U-101 lithium bromide refrigerators；E-101 exchanges heat
Device；E-102 switches heat exchanger；1 waste gas；2 spark arresters；3 emptyings；4 spark arresters；5 Waste Water Treatments；6 Waste Water Treatments；
CWS is water on cooling water；CWR is cooling water backwater；WINTER is winter.
Below by embodiment, the invention will be further elaborated, but is not limited only to the present embodiment.
Embodiment
【Embodiment 1】
Using technological process shown in Fig. 1,120 DEG C of exhaust temperature, flow 967.07kg/h (N2=88.18wt%, EO=
0wt%, PO=11.82wt%) washed by an effect waste gas absorption tower T-101 (19 pieces of theoretical cam curve), washings are
40 degree of containing alcohol waste water 15t/h (H2O=70wt%, EG=30wt%, PO=0wt%), top of tower waste gas enters after absorption
Two effect waste gas absorption tower T-102 (19 pieces of theoretical cam curve) carry out secondary washing, and second wash water is 10 degree of containing alcohol waste water 4t/
h(H2O=70wt%, EG=30wt%).EO contents are respectively 0PPM in gas phase after washing, and PO contents are 14PPB.One effect bottom of towe
Portion washing rich solution 15152.94kg/h (wherein EO contents 0kg/h, PO content 115.509kg/h) passes through an effect waste water pump P-101
It is discharged downstream reaction unit and is reacted (exothermic reaction), EO/PO (the EO/PO hydration generations in waste water is removed through catalysis hydration
Correspondence dihydric alcohol), 45.1 DEG C of lean solution temperature after reaction first carry out heat exchange reaction, temperature after heat exchange through switching heat exchanger E-102
It is changed into 42.3 degree, an effect waste gas absorption tower top is back to after being cooled to 40 DEG C through heat exchanger, is recycled as washings.One effect
41.8 DEG C of reactor feed temperature, pressure 0.05MPa, residence time 11min.Ethylene oxide/propylene oxide conversion ratio after reaction
For 99.999%.One effect hydration reactor R-101 is suspension bed catalytic reactor, and internal diameter 1200mm, Catalyst packing is effectively high
Spend 2500mm, loading catalyst volume 3.2m3.Catalyst uses the resinae composition metal that Shanghai Petroleum Chemical Engineering Institute provides
Catalyst.Reacting the accessory substance produced mainly includes propane diols (PG), DPG (DPG) and unreacted nitrogen etc..It can enter
Row subsequent recovery is utilized.
Two effect waste gas absorption tower T-102 are absorbed again to an effect washing column overhead waste gas using low temperature chilled water, remove tower
The micro EO/PO in waste gas is pushed up, to ensure that discharge waste gas reaches environmental emission standard.Two effect waste gas absorption absorption tower tower reactor rich solutions
Two effect water are delivered to after E-102 through two effect tower waste water pump P-102 pumps and reactor R-102 is reacted (exothermic reaction), through urging
Change after the EO/PO (EO/PO hydration generation correspondences dihydric alcohol) that hydration is removed in waste water, reaction lean solution is through lithium bromide refrigerator U-
Two effect exhaust gas washing tower tower tops are delivered to after 101 coolings to recycle as absorbing liquid.Two 28 DEG C of validity response device temperature, pressure
0.05MPa, residence time 9min.Ethylene oxide/propylene oxide conversion ratio is 99.999% after reaction.Two effect hydration reactor R-
102 be suspension bed catalytic reactor, internal diameter 600mm, Catalyst packing effective depth 2200mm, loading catalyst volume
0.63m3。
【Embodiment 2】
Using technological process shown in Fig. 1,120 DEG C of exhaust temperature, flow 1015.862kg/h (N2=0.6514002wt%,
EO=0.289wt%, other impurities (including：Isopropanol, n-butanol, 2-EH (two propyl alcohol) phenol, NONYL PHENOL. tallows
Amine, stearylamine, EDA (ethene ethylenediamine))=6wt%) carried out by an effect waste gas absorption tower T-101 (19 pieces of theoretical cam curve)
Washing, washings are 40 degree of containing alcohol waste water 15t/h (H2O=70wt%, EG=30wt%), top of tower waste gas is laggard through absorbing
Enter two effect waste gas absorption tower T-102 (19 pieces of theoretical cam curve) and carry out secondary washing, second wash water is 10 degree of containing alcohol waste water
4t/h(H2O=70wt%, EG=30wt%).EO contents are respectively 4PPB in gas phase after washing.One effect tower bottom washing rich solution
13943.572kg/h (wherein EO contents 293.356kg/h, PO content 0kg/h) is discharged downstream instead by an effect waste water pump P-101
Answer device to be reacted (exothermic reaction), EO/PO (the EO/PO hydration generation correspondence binary in waste water is removed through catalysis hydration
Alcohol), 58 DEG C of lean solution temperature after reaction first pass through switching heat exchanger E-102 and carry out heat exchange reaction, temperature is changed into 55 after heat exchange
DEG C, an effect waste gas absorption tower top is back to after being cooled to 40 DEG C through heat exchanger, is recycled as washings.One validity response device enters
44.5 DEG C of material temperature degree, pressure 0.05MPa, residence time 11min.Ethylene oxide/propylene oxide conversion ratio is after reaction
99.999%.One effect hydration reactor R-101 is suspension bed catalytic reactor, internal diameter 1200mm, Catalyst packing effective depth
2500mm, loading catalyst volume 2.8m3.The resinae composition metal that catalyst is provided using Shanghai Petroleum Chemical Engineering Institute is urged
Agent.Reacting the accessory substance produced mainly includes propane diols (PG), DPG (DPG) and unreacted nitrogen etc..Can carry out
Subsequent recovery is utilized.
Two effect waste gas absorption tower T-102 are absorbed again to an effect washing column overhead waste gas using low temperature chilled water, remove tower
The micro EO/PO in waste gas is pushed up, to ensure that discharge waste gas reaches environmental emission standard.Two effect waste gas absorption absorption tower tower reactor rich solutions
Two effect water are delivered to after E-102 through two effect tower waste water pump P-102 pumps and reactor R-102 is reacted (exothermic reaction), through urging
Change after the EO/PO (EO/PO hydration generation correspondences dihydric alcohol) that hydration is removed in waste water, reaction lean solution is through lithium bromide refrigerator U-
Two effect exhaust gas washing tower tower tops are delivered to after 101 coolings to recycle as absorbing liquid.Two 28 DEG C of validity response device temperature, pressure
0.05MPa, residence time 9min.Ethylene oxide/propylene oxide conversion ratio is 99.999% after reaction.Two effect hydration reactor R-
102 be suspension bed catalytic reactor, internal diameter 600mm, Catalyst packing effective depth 2200mm, loading catalyst volume
0.63m3。
【Embodiment 3】
Using technological process shown in Fig. 1,120 DEG C of exhaust temperature, flow 1015.862kg/h (N2=0.6514002wt%,
EO=0.289wt%, other impurities (including：Isopropanol, n-butanol, 2-EH (two propyl alcohol) phenol, NONYL PHENOL. tallows
Amine, stearylamine, EDA (ethene ethylenediamine))=6wt%) carried out by an effect waste gas absorption tower T-101 (19 pieces of theoretical cam curve)
Washing, washings are 50 degree of containing alcohol waste water 15t/h (H2O=70wt%, EG=30wt%), top of tower waste gas is laggard through absorbing
Enter two effect waste gas absorption tower T-102 (19 pieces of theoretical cam curve) and carry out secondary washing, second wash water is 10 degree of containing alcohol waste water
4t/h(H2O=70wt%, EG=30wt%).EO contents are respectively 23PPM in gas phase after washing.One effect tower bottom washing rich solution
13883.544kg/h (wherein EO contents 260.721kg/h, PO content 0kg/h) is discharged downstream instead by an effect waste water pump P-101
Answer device to be reacted (exothermic reaction), EO/PO (the EO/PO hydration generation correspondence binary in waste water is removed through catalysis hydration
Alcohol), 64.4 DEG C of lean solution temperature after reaction first pass through switching heat exchanger E-102 and carry out heat exchange reaction, temperature is changed into 62 after heat exchange
DEG C, an effect waste gas absorption tower top is back to after being cooled to 50 DEG C through heat exchanger, is recycled as washings.One validity response device enters
52.6 DEG C of material temperature degree, pressure 0.05MPa, residence time 9min.Ethylene oxide/propylene oxide conversion ratio is after reaction
99.999%.One effect hydration reactor R-101 is suspension bed catalytic reactor, internal diameter 1000mm, Catalyst packing effective depth
2800mm, loading catalyst volume 2.2m3.The resinae composition metal that catalyst is provided using Shanghai Petroleum Chemical Engineering Institute is urged
Agent.Reacting the accessory substance produced mainly includes propane diols (PG), DPG (DPG) and unreacted nitrogen etc..Can carry out
Subsequent recovery is utilized.
Two effect waste gas absorption tower T-102 are absorbed again to an effect washing column overhead waste gas using low temperature chilled water, remove tower
The micro EO/PO in waste gas is pushed up, to ensure that discharge waste gas reaches environmental emission standard.Two effect waste gas absorption absorption tower tower reactor rich solutions
Two effect water are delivered to after E-102 through two effect tower waste water pump P-102 pumps and reactor R-102 is reacted (exothermic reaction), through urging
Change after the EO/PO (EO/PO hydration generation correspondences dihydric alcohol) that hydration is removed in waste water, reaction lean solution is through lithium bromide refrigerator U-
Two effect exhaust gas washing tower tower tops are delivered to after 101 coolings to recycle as absorbing liquid.Two 28 DEG C of validity response device temperature, pressure
0.05MPa, residence time 9min.Ethylene oxide/propylene oxide conversion ratio is 99.999% after reaction.Two effect hydration reactor R-
102 be suspension bed catalytic reactor, internal diameter 600mm, Catalyst packing effective depth 2200mm, loading catalyst volume
0.63m3。
【Embodiment 4】
Using technological process shown in Fig. 1,120 DEG C of exhaust temperature, flow 1015.862kg/h (N2=0.6514002wt%,
EO=0.289wt%, other impurities (including：Isopropanol, n-butanol, 2-EH (two propyl alcohol) phenol, NONYL PHENOL. tallows
Amine, stearylamine, EDA (ethene ethylenediamine))=6wt%) carried out by an effect waste gas absorption tower T-101 (19 pieces of theoretical cam curve)
Washing, washings are 60 degree of containing alcohol waste water 15t/h (H2O=70wt%, EG=30wt%), top of tower waste gas is laggard through absorbing
Enter two effect waste gas absorption tower T-102 (19 pieces of theoretical cam curve) and carry out secondary washing, second wash water is 10 degree of containing alcohol waste water
4t/h(H2O=70wt%, EG=30wt%).EO contents are respectively 0.006wt% in gas phase after washing.One effect tower bottom washing
Rich solution 13769.989kg/h (wherein EO contents 260.721kg/h, PO content 0kg/h) is discharged into down by an effect waste water pump P-101
Trip reaction unit is reacted (exothermic reaction), and EO/PO (the EO/PO hydration generations correspondences two in waste water are removed through catalysis hydration
First alcohol), 68.2 DEG C of lean solution temperature after reaction first pass through switching heat exchanger E-102 and carry out heat exchange reaction, temperature is changed into after heat exchange
61 DEG C, an effect waste gas absorption tower top is back to after being cooled to 60 DEG C through heat exchanger, is recycled as washings.One validity response device
59.2 DEG C of feeding temperature, pressure 0.05MPa, residence time 8min.Ethylene oxide/propylene oxide conversion ratio is after reaction
99.999%.One effect hydration reactor R-101 is suspension bed catalytic reactor, internal diameter 1000mm, Catalyst packing effective depth
2500mm, loading catalyst volume 1.96m3.Catalyst uses the resinae composition metal that Shanghai Petroleum Chemical Engineering Institute provides
Catalyst.Reacting the accessory substance produced mainly includes propane diols (PG), DPG (DPG) and unreacted nitrogen etc..It can enter
Row subsequent recovery is utilized.
Two effect waste gas absorption tower T-102 are absorbed again to an effect washing column overhead waste gas using low temperature chilled water, remove tower
The micro EO/PO in waste gas is pushed up, to ensure that discharge waste gas reaches environmental emission standard.Two effect waste gas absorption absorption tower tower reactor rich solutions
Two effect water are delivered to after E-102 through two effect tower waste water pump P-102 pumps and reactor R-102 is reacted (exothermic reaction), through urging
Change after the EO/PO (EO/PO hydration generation correspondences dihydric alcohol) that hydration is removed in waste water, reaction lean solution is through lithium bromide refrigerator U-
Two effect exhaust gas washing tower tower tops are delivered to after 101 coolings to recycle as absorbing liquid.Two 55 DEG C of validity response device temperature, pressure
0.05MPa, residence time 5min.Ethylene oxide/propylene oxide conversion ratio is 99.999% after reaction.Two effect hydration reactor R-
102 be suspension bed catalytic reactor, internal diameter 600mm, Catalyst packing effective depth 1500mm, loading catalyst volume
0.42m3。
【Embodiment 5】
According to the condition and step described in embodiment 2, under worst cold case (operating mode three), an effect hydration reactor R-101
Reacted lean solution is only back to an effect waste gas absorption tower T-101 tower tops after heat exchanger E-101, and other flows are with normal work
Condition, under worst cold case, switching heat exchanger E102 enters cooling water.R-102 reactor feeds are carried out using recirculated cooling water
Preheating.
Using technological process shown in Fig. 1,120 DEG C of exhaust temperature, flow 1015.862kg/h (N2=0.6514002wt%,
EO=0.289wt%, other impurities (including：Isopropanol, n-butanol, 2-EH (two propyl alcohol) phenol, NONYL PHENOL. tallows
Amine, stearylamine, EDA (ethene ethylenediamine))=6wt%) carried out by an effect waste gas absorption tower T-101 (19 pieces of theoretical cam curve)
Washing, washings are 25 degree of containing alcohol waste water 15t/h (H2O=70wt%, EG=30wt%), top of tower waste gas is laggard through absorbing
Enter two effect waste gas absorption tower T-102 (19 pieces of theoretical cam curve) and carry out secondary washing, second wash water is 10 degree of containing alcohol waste water
4t/h(H2O=70wt%, EG=30wt%).EO contents are respectively trace in gas phase after washing.One effect tower bottom washing is rich
Liquid 13963.779kg/h (wherein EO contents 293.368kg/h, PO content 0kg/h) is discharged downstream by an effect waste water pump P-101
Reaction unit is reacted (exothermic reaction), and EO/PO (the EO/PO hydration generation correspondence binary in waste water is removed through catalysis hydration
Alcohol), 44.7 DEG C of lean solution temperature after reaction are back to an effect waste gas absorption tower top after being cooled to 40 DEG C through heat exchanger E-101, as
Washings are recycled.One 33 DEG C of validity response device feeding temperature, pressure 0.05MPa, residence time 13min.Epoxy second after reaction
Alkane/epoxypropane conversion rate is 99.999%.One imitates hydration reactor R-101 for suspension bed catalytic reactor, internal diameter 1200mm,
Catalyst packing effective depth 2800mm, loading catalyst volume 3.2m3.Catalyst is provided using Shanghai Petroleum Chemical Engineering Institute
Resinae composite metal catalyst.Reacting the accessory substance produced mainly includes propane diols (PG), DPG (DPG) and not anti-
Nitrogen answered etc..Subsequent recovery utilization can be carried out.
Two effect waste gas absorption tower T-102 are absorbed again to an effect washing column overhead waste gas using low temperature chilled water, remove tower
The micro EO/PO in waste gas is pushed up, to ensure that discharge waste gas reaches environmental emission standard.Two effect waste gas absorption absorption tower tower reactor rich solutions
Two effect water are delivered to after being preheated through two effect tower waste water pump P-102 pumps through E-102 with recirculated cooling water and reactor R-102 is reacted
(exothermic reaction), after the EO/PO (EO/PO hydration generation correspondences dihydric alcohol) in waste water is removed through catalysis hydration, reaction lean solution warp
Two effect exhaust gas washing tower tower tops are delivered to after lithium bromide refrigerator U-101 coolings to recycle as absorbing liquid.Two validity response device temperature
Spend 20 DEG C, pressure 0.05MPa, residence time 12min.Ethylene oxide/propylene oxide conversion ratio is 99.999% after reaction.Two effects
Hydration reactor R-102 is suspension bed catalytic reactor, internal diameter 800mm, Catalyst packing effective depth 1600mm, filling catalysis
Agent volume 0.8m3。
【Embodiment 6】
According to the condition and step described in embodiment 3, in the case of nominal situation one, without EO/ in cleaning solution in an effect tower
During PO contents, an effect scrubbing tower rich solution can be used directly recirculated cooling water after being reacted through catalysis hydration and be cooled down (E101), no
With being preheated again by E-102.
Using technological process shown in Fig. 1,120 DEG C of exhaust temperature, flow 1015.862kg/h (N2=0.6514002wt%,
EO=0.289wt%, other impurities (including：Isopropanol, n-butanol, 2-EH (two propyl alcohol) phenol, NONYL PHENOL. tallows
Amine, stearylamine, EDA (ethene ethylenediamine))=6wt%) carried out by an effect waste gas absorption tower T-101 (19 pieces of theoretical cam curve)
Washing, washings are 50 degree of containing alcohol waste water 15t/h (H2O=70wt%, EG=30wt%), top of tower waste gas is laggard through absorbing
Enter two effect waste gas absorption tower T-102 (19 pieces of theoretical cam curve) and carry out secondary washing, second wash water is 10 degree of containing alcohol waste water
4t/h(H2O=70wt%, EG=30wt%).EO contents are respectively 23PPM in gas phase after washing.One effect tower bottom washing rich solution
13883.544kg/h (wherein EO contents 260.721kg/h, PO content 0kg/h) is discharged downstream instead by an effect waste water pump P-101
Answer device to be reacted (exothermic reaction), EO/PO (the EO/PO hydration generation correspondence binary in waste water is removed through catalysis hydration
Alcohol), 64.4 DEG C of lean solution temperature after reaction are back to an effect waste gas absorption tower top, are used as washing after being cooled to 50 DEG C through heat exchanger
Water circulation is used.One 52.6 DEG C of validity response device feeding temperature, pressure 0.05MPa, residence time 9min.Oxirane after reaction/
Epoxypropane conversion rate is 99.999%.One effect hydration reactor R-101 is suspension bed catalytic reactor, and internal diameter 1000mm is urged
Agent loads effective depth 2800mm, loading catalyst volume 2.2m3.Catalyst is provided using Shanghai Petroleum Chemical Engineering Institute
Resinae composite metal catalyst.Reacting the accessory substance produced mainly includes propane diols (PG), DPG (DPG) and unreacted
Nitrogen etc..Subsequent recovery utilization can be carried out.
Two effect waste gas absorption tower T-102 are absorbed again to an effect washing column overhead waste gas using low temperature chilled water, remove tower
The micro EO/PO in waste gas is pushed up, to ensure that discharge waste gas reaches environmental emission standard.Two effect waste gas absorption absorption tower tower reactor rich solutions
Two effect water are delivered to after E-102 through two effect tower waste water pump P-102 pumps and reactor R-102 is reacted (exothermic reaction), through urging
Change after the EO/PO (EO/PO hydration generation correspondences dihydric alcohol) that hydration is removed in waste water, reaction lean solution is through lithium bromide refrigerator U-
Two effect exhaust gas washing tower tower tops are delivered to after 101 coolings to recycle as absorbing liquid.Two 22.9 DEG C of validity response device temperature, pressure
0.05MPa, residence time 12min.Ethylene oxide/propylene oxide conversion ratio is 99.999% after reaction.Two effect hydration reactors
R-102 is suspension bed catalytic reactor, internal diameter 800mm, Catalyst packing effective depth 1600mm, loading catalyst volume
0.8m3。
【Embodiment 7】
According to the condition and step described in embodiment 4, in the case of nominal situation one, without EO/ in cleaning solution in an effect tower
During PO contents, an effect scrubbing tower rich solution can be used directly recirculated cooling water after being reacted through catalysis hydration and be cooled down (E101), no
With being preheated again by E-102.
Using technological process shown in Fig. 1,120 DEG C of exhaust temperature, flow 1015.862kg/h (N2=0.6514002wt%,
EO=0.289wt%, other impurities (including：Isopropanol, n-butanol, 2-EH (two propyl alcohol) phenol, NONYL PHENOL. tallows
Amine, stearylamine, EDA (ethene ethylenediamine))=6wt%) carried out by an effect waste gas absorption tower T-101 (19 pieces of theoretical cam curve)
Washing, washings are 60 degree of containing alcohol waste water 15t/h (H2O=70wt%, EG=30wt%), top of tower waste gas is laggard through absorbing
Enter two effect waste gas absorption tower T-102 (19 pieces of theoretical cam curve) and carry out secondary washing, second wash water is 10 degree of containing alcohol waste water
4t/h(H2O=70wt%, EG=30wt%).EO contents are respectively 0.006wt% in gas phase after washing.One effect tower bottom washing
Rich solution 13769.989kg/h (wherein EO contents 260.721kg/h, PO content 0kg/h) is discharged into down by an effect waste water pump P-101
Trip reaction unit is reacted (exothermic reaction), and EO/PO (the EO/PO hydration generations correspondences two in waste water are removed through catalysis hydration
First alcohol), 68.2 DEG C of lean solution temperature after reaction first pass through switching heat exchanger E-102 and carry out heat exchange reaction, temperature is changed into after heat exchange
61 DEG C, an effect waste gas absorption tower top is back to after being cooled to 60 DEG C through heat exchanger, is recycled as washings.One validity response device
59.2 DEG C of feeding temperature, pressure 0.05MPa, residence time 8min.Ethylene oxide/propylene oxide conversion ratio is after reaction
99.999%.One effect hydration reactor R-101 is suspension bed catalytic reactor, internal diameter 1000mm, Catalyst packing effective depth
2500mm, loading catalyst volume 1.96m3.Catalyst uses the resinae composition metal that Shanghai Petroleum Chemical Engineering Institute provides
Catalyst.Reacting the accessory substance produced mainly includes propane diols (PG), DPG (DPG) and unreacted nitrogen etc..It can enter
Row subsequent recovery is utilized.
Two effect waste gas absorption tower T-102 are absorbed again to an effect washing column overhead waste gas using low temperature chilled water, remove tower
The micro EO/PO in waste gas is pushed up, to ensure that discharge waste gas reaches environmental emission standard.Two effect waste gas absorption absorption tower tower reactor rich solutions
Two effect water are delivered to after E-102 through two effect tower waste water pump P-102 pumps and reactor R-102 is reacted (exothermic reaction), through urging
Change after the EO/PO (EO/PO hydration generation correspondences dihydric alcohol) that hydration is removed in waste water, reaction lean solution is through lithium bromide refrigerator U-
Two effect exhaust gas washing tower tower tops are delivered to after 101 coolings to recycle as absorbing liquid.Two 55 DEG C of validity response device temperature, pressure
0.05MPa, residence time 5min.Ethylene oxide/propylene oxide conversion ratio is 99.999% after reaction.Two effect hydration reactor R-
102 be suspension bed catalytic reactor, internal diameter 600mm, Catalyst packing effective depth 1500mm, loading catalyst volume
0.42m3。
Obviously, high with washing water use efficiency using the method for the present invention, total energy approach reduces energy consumption, after washing
Waste liquid is disposable, plant running safety and stability, accessory substance recoverable, increases economic benefit.Solve existing containing EO/PO
The washing water consumption of waste gas generally existing is big, the problems such as waste water is difficult after washing, can be carried out under lower temperature and pressure anti-
Should, plant energy consumption is saved, with larger technical advantage.
Claims (8)
1. a kind of waste gas processing method containing EO and PO, including following operating mode：
(1) nominal situation one：Waste gas containing EO/PO enters an effect waste gas absorption tower T101 and absorbed, and top of tower waste gas is through absorbing
After be discharged into two effect waste gas absorption tower T102 and washed, waste gas reaches that environmental emission standard is discharged into air after washing；One effect waste gas
The discharging of scrubbing tower T102 bottom wash rich solution is pumped into an effect hydration reactor R101 through an effect tower waste water pump P101 and reacted,
The EO/PO in waste water is removed through catalysis hydration, lean solution feeding heat exchanger E101 is recycled to an effect after being cooled with circulating water after reaction
Waste gas absorption tower top, is recycled as absorbing liquid；Two effect waste gas absorption tower T102 use an effect washing column overhead waste gas low
Warm chilled water is absorbed again, and air is emitted into after removing the micro EO/PO in tower top waste gas；Two effect waste gas absorption absorption tower tower reactors
Rich solution is pumped to two effect water through two effect tower waste water pump P102 and reactor R102 is reacted, and is removed through catalysis hydration in waste water
After EO/PO, reaction lean solution is recycled to two effect exhaust gas washing tower tower tops after being cooled down through lithium bromide refrigerator U101 and followed as absorbing liquid
Ring is used；When EO/PO too high levels in chilled water, when causing the discharging of T102 waste gas undesirable, by part low temperature chilled water
Squeeze into the effect scrubbing tower washings of upstream one and carry out catalytic reaction processing, while supplementing equivalent low temperature chilled water to meet two effects
Tower clean result meets environmental requirement；With the binary determining alcohol rise that catalysis hydration is generated in circulating absorption solution, when absorption is followed
In ring waste water during dihydric alcohol excessive concentration, the hydration reactor ways of escape are imitated by part in an effect waste gas absorption tower overhead reflux line and two
High containing alcohol waste water is discharged into sewage disposal system in factory, and the supplement equivalent fresh water in tower top cooling line；
(2) the complete EO/PO of unreacted is contained in nominal situation two, an effect scrubbing tower washings：
Waste gas containing EO/PO enters an effect waste gas absorption tower T101 and absorbed, and an effect waste gas absorption tower T101 and two effect waste gas are inhaled
Receive tower T102 and be atmospheric operation, top of tower waste gas is discharged into two effect waste gas absorption tower T102 after absorption and washed, after washing
Waste gas is discharged into air, and an effect exhaust gas washing tower T102 bottom wash rich solution discharging is pumped into an effect water through an effect tower waste water pump P101
Close reactor R101 to be reacted, the EO/PO in waste water is removed through catalysis hydration, lean solution feeding heat exchanger E102 is carried out after reaction
Heat exchange, then an effect waste gas absorption tower top is recycled to after being cooled with circulating water by E101, recycled as absorbing liquid；Two effects
Waste gas absorption tower T102 is absorbed again to an effect washing column overhead waste gas using low temperature chilled water, removes more amount in tower top waste gas
EO/PO, with ensure discharge waste gas reach ring requirement；Two effect waste gas absorption absorption tower tower reactor rich solutions are through two effect tower waste water pump P102
Heat exchanger E102 preheatings are pumped to, chilled water feeding two imitates water after preheating and reactor R102 is reacted, and is removed through catalysis hydration
Go after the EO/PO in waste water, reaction lean solution is recycled to two effect exhaust gas washing tower tower tops and made after being cooled down through lithium bromide refrigerator U101
Recycled for absorbing liquid；With the binary determining alcohol rise that catalysis hydration is generated in circulating absorption solution, when absorption cycle waste water
During middle dihydric alcohol excessive concentration, the hydration reactor ways of escape are imitated by the high containing alcohol in part in an effect waste gas absorption tower overhead reflux line and two
Waste water is discharged into sewage disposal system in factory；
(3) damage, worst cold case：
The one effect reacted lean solutions of hydration reactor R-101 are only back to an effect waste gas absorption tower T-101 after heat exchanger E-101
Tower top, other same nominal situations of flow, under worst cold case, switching heat exchanger E102 enters cooling water, uses recirculated cooling water
R-102 reactor feeds are preheated.
2. the waste gas processing method according to claim 1 containing EO and PO, it is characterised in that an effect waste gas absorption tower T-101 and
Two effect waste gas absorption tower T-102 are atmospheric operation.
3. the waste gas processing method according to claim 1 containing EO and PO, it is characterised in that an effect waste gas absorption tower T-101 towers
Kettle, an effect waste gas absorption tower T-101 tower tops discharge pipe, two effect waste gas absorption tower T-102 tower reactors, two effect waste gas absorption tower T-
Protection nitrogen pipeline interface is equipped with 102 vent lines.
4. the waste gas processing method according to claim 1 containing EO and PO, it is characterised in that be back to an effect waste gas absorption tower
The pipeline of T-101 tower tops, it is back to the pipelines of two effect waste gas absorption tower T-102 tower tops and is made up line interface provided with fresh water.
5. the waste gas processing method according to claim 1 containing EO and PO, it is characterised in that two effect hydration reactor R-102 are anti-
Lean solution after answering, by weight, 0~100% removes Waste Water Treatment；It is back to the thing of an effect waste gas absorption tower T-101 tower tops
Material, by weight, 0~100% removes Waste Water Treatment.
6. the waste gas processing method according to claim 1 containing EO and PO, it is characterised in that an effect waste gas absorption tower T-101's
Spark arrester is equipped with exhaust gas inlet line, on two effect waste gas absorption tower T-102 tower top vent lines.
7. the waste gas processing method according to claim 1 containing EO and PO, it is characterised in that an effect hydration reactor R-101,
The resinae that hydration reaction catalyst in two effect hydration reactor R-102 is provided using Shanghai Petroleum Chemical Engineering Institute is combined
Metallic catalyst；One effect hydration reactor R-101, two effect hydration reactor R-102 reaction condition are：10 DEG C of reaction temperature
~125 DEG C, reaction pressure 0.05MPa~0.15MPa, residence time 2-15min, into the oxirane in hydration reactor with
The mass ratio of catalyst is 0.01~1 in hydration reactor：1, the raw materials components mole ratio of water and oxirane is 2~400:1；One effect
Waste gas absorption tower T-101 operating condition is：Absorb water with enter the mol ratio of the oxirane in waste gas absorption tower for 2~
400:1, it is -15~70 DEG C to absorb coolant-temperature gage, and normal pressure, theoretical cam curve is 3~30, into the protection nitrogen in waste gas absorption tower
Volume ratio with waste gas is 0.1~1：1；Two effect waste gas absorption tower T-102 operating conditions are：Absorb water and enter waste gas absorption
The mol ratio of oxirane in tower is 2~400:1, absorb coolant-temperature gage be -15~50 DEG C, normal pressure, theoretical cam curve be 3~
30, it is 0.1~1 into the protection nitrogen and the volume ratio of waste gas in waste gas absorption tower：1.
8. the waste gas processing method according to claim 7 containing EO and PO, it is characterised in that an effect hydration reactor R-101,
Two effect hydration reactor R-102 reaction condition is：25 DEG C~120 DEG C of reaction temperature, the charging mole of water and oxirane
Than for 4~200:1；One effect waste gas absorption tower T-101 operating condition is：Water is absorbed with entering the epoxy second in waste gas absorption tower
The mol ratio of alkane is 4~200:1, normal pressure, theoretical cam curve is 8~15；Two effect waste gas absorption tower T-101 operating conditions are：
It is 4~200 to absorb water with entering the mol ratio of the oxirane in waste gas absorption tower:1, normal pressure, theoretical cam curve is 8~20.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107648999A (en) * | 2017-10-16 | 2018-02-02 | 浙江工业大学 | A kind of sterilization oxirane emission control technology and device |
| CN111116515A (en) * | 2018-10-30 | 2020-05-08 | 中国石油化工股份有限公司 | Alkylene oxide recovery process |
| CN111116517A (en) * | 2018-10-30 | 2020-05-08 | 中国石油化工股份有限公司 | Method for recovering butylene oxide |
| CN111116516A (en) * | 2018-10-30 | 2020-05-08 | 中国石油化工股份有限公司 | Process for the recovery of alkylene oxide |
| CN111116518A (en) * | 2018-10-30 | 2020-05-08 | 中国石油化工股份有限公司 | Method for recycling alkylene oxide |
| CN112898120A (en) * | 2021-01-21 | 2021-06-04 | 中国石油化工股份有限公司 | Device and method for producing ethylene glycol |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106310879A (en) * | 2016-09-30 | 2017-01-11 | 中石化上海工程有限公司 | Method for treating exhaust gas containing ethylene oxide and propylene oxide |
-
2017
- 2017-03-23 CN CN201710179353.6A patent/CN106955563A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106310879A (en) * | 2016-09-30 | 2017-01-11 | 中石化上海工程有限公司 | Method for treating exhaust gas containing ethylene oxide and propylene oxide |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107648999A (en) * | 2017-10-16 | 2018-02-02 | 浙江工业大学 | A kind of sterilization oxirane emission control technology and device |
| CN107648999B (en) * | 2017-10-16 | 2020-10-02 | 浙江工业大学 | Disinfection and sterilization ethylene oxide waste gas treatment process and device |
| CN111116515A (en) * | 2018-10-30 | 2020-05-08 | 中国石油化工股份有限公司 | Alkylene oxide recovery process |
| CN111116517A (en) * | 2018-10-30 | 2020-05-08 | 中国石油化工股份有限公司 | Method for recovering butylene oxide |
| CN111116516A (en) * | 2018-10-30 | 2020-05-08 | 中国石油化工股份有限公司 | Process for the recovery of alkylene oxide |
| CN111116518A (en) * | 2018-10-30 | 2020-05-08 | 中国石油化工股份有限公司 | Method for recycling alkylene oxide |
| CN111116516B (en) * | 2018-10-30 | 2022-10-11 | 中国石油化工股份有限公司 | Process for the recovery of alkylene oxide |
| CN111116515B (en) * | 2018-10-30 | 2022-11-04 | 中国石油化工股份有限公司 | Alkylene oxide recovery process |
| CN112898120A (en) * | 2021-01-21 | 2021-06-04 | 中国石油化工股份有限公司 | Device and method for producing ethylene glycol |
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Application publication date: 20170718 |