CN104341069B - A kind of method purifying the technique lime set produced in preparing phenylethylene from dehydrogenation of phenylethane process - Google Patents

A kind of method purifying the technique lime set produced in preparing phenylethylene from dehydrogenation of phenylethane process Download PDF

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CN104341069B
CN104341069B CN201310316846.1A CN201310316846A CN104341069B CN 104341069 B CN104341069 B CN 104341069B CN 201310316846 A CN201310316846 A CN 201310316846A CN 104341069 B CN104341069 B CN 104341069B
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stripping
lime set
tower
air
technique lime
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CN104341069A (en
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潘罗其
杜建文
黄伊辉
刘文杰
王玉枫
余卫勋
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China Petroleum and Chemical Corp
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • 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
    • 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
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment

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  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

The invention provides a kind of method purifying the technique lime set produced in preparing phenylethylene from dehydrogenation of phenylethane process, it is characterized in that, to add in oxytropism dehydrogenation liquid before acid dehydrogenation liquid enters air cooler in amine substance and, thus farthest avoid metallic corrosion and produce iron ion; In admission stripper forward direction technique lime set, add stopper, the polymerization fouling of component in stripping tower such as vinylbenzene in effective Controlling Technology lime set, improves the stripping clearance of hydro carbons in this tower; And pass through by stripping tower bottom water without in the direct introducing air stripping tower of cooling, removing hydro carbons wherein, improves the temperature of stripping gas simultaneously further, thus the thermo-efficiency of raising steam superheater; Finally the technique lime set after stripping is sent in sand tower, thus except the polystyrene of deoxidation formation, the hydro carbons of colloidal and metal oxide etc.

Description

A kind of method purifying the technique lime set produced in preparing phenylethylene from dehydrogenation of phenylethane process
Technical field
The present invention relates to a kind of method purifying the technique lime set produced in preparing phenylethylene from dehydrogenation of phenylethane process, to be specially in ethyl benzene dehydrogenation preparation of styrene process produce the minimizing technology of hydro carbons and metal oxide in technique lime set, more specifically for carrying out the method effectively removed to the hydro carbons such as the toluene in this lime set, ethylbenzene, vinylbenzene and iron ion, catalyst dust metal oxide.
Background technology
Vinylbenzene is the important source material of synthetic rubber and plastics industry.Ethylbenzene catalytic dehydrogenation method is produce vinylbenzene main method both at home and abroad always, accounts for 85% of production of styrene ability.For ensureing normally carrying out of ethylbenzene dehydrogenation reaction, need in Industrial processes to inject high-temperature water vapor by the amount of water-oil ratio (steam/ethylbenzene, weight ratio) 1.3 ~ 1.6.This steam not only provides reaction institute heat requirement, and reduces system dividing potential drop as inert diluent, is conducive to the carrying out of dehydrogenation reaction.The steam injected and reaction product through sending out vapour with reaction mass heat exchange, waste heat boiler, the multi-stage heat exchanger such as water filling chilling, air cooler cool, circulating water and final cool after, in water-and-oil separator, form the oil phase of upper strata containing compositions such as a large amount of ethylbenzene, vinylbenzene and minute quantity benzene, toluene and tar, lower floor is then the technique lime set that water vapor is formed after cooling but containing above-mentioned micro-hydro carbons, iron ion and catalyst dust metal oxide.
In ethylbenzene catalytic dehydrogenation process, water vapor and ethylbenzene, under the reaction conditions of 615 ~ 645 DEG C, also can generate CO and CO with the carbon deposit generation water gas shift reaction of catalyst surface 2, CO 2major part can be dissolved in technique lime set, and is present in system with equilibrium state, and such existence has corresponding infection to follow-up system, causes the iron concentration in technique lime set to uprise.And take ferric oxide as main active component, add the catalyzer of the auxiliary agents such as salt of wormwood, cerium salt, molybdenum oxide and magnesium oxide under the erosion of high-temperature water vapor, the metal oxide containing catalyst dust also enters in technique lime set.Like this, in technique lime set, not only there is the hydro carbons of trace, and containing metallics, could need utilize through purification.
In early stage ethyl benzene dehydrogenation preparation of styrene industry, the technique lime set of generation is merely through simple oil removal process, and the hydro carbons wherein contained directly is not discharged as waste water through process.There is in patent documentation the treatment process disclosed this waste water afterwards, as CS258194 discloses a kind of method processing aromatic hydrocarbons in waste water, this patent uses packing tower, under 185 DEG C and 0.65MPa (G) pressure, use water vapor stripping, and then use activated carbon filtration.The method exists that working pressure is large and temperature is high, the shortcoming of hydro carbons weak effect, adsorption effect of activated carbon in water difference in stripping.Describe in patent documentation SU789414 in a kind of waste water and remove polyester resin and cinnamic method.It is that waste water is heated to 30 ~ 50 DEG C, with 1.4 ~ 1.5 kilograms of Ca (OH) 2/ M 3waste water preparation condition, thus purification of waste water rate is improved.The obvious Shortcomings part of the method, it adopts Ca (OH) 2process waste water, can bring other ion into and pollute lime set, is difficult to the practical situation adapting to the process of vinylbenzene technique lime set.
CN1247837A discloses a kind of waste water treatment process of preparation of styrene from ethylbenzene.In the method, waste water is first equipped with the treater using storng-acid cation exchange resin sulphonated coal as sorbent material through one, when waste water flows through adsorbent bed, catalyst dust in bed, metallic compound are removed, and then enter a stripping tower, adopt open steam stripping, gone out with water vapor stripping by the hydro carbons such as the benzene in waste water, toluene, vinylbenzene, steam part and after condensation, be recycled to water-and-oil separator to reclaim hydro carbons, the water at the bottom of tower after stripping purification is as oiler feed.Existing industry park plan technique adopts and CN1247837A publication similar technique, but after technique lime set is first removed a large amount of hydro carbons by stripping tower stripping, then carry out adsorption treatment through being equipped with anthracitic strainer.Both absorption is just contrary with steam stripped flow sequence, and the former uses storng-acid cation exchange resin sulphonated coal as sorbent material, and latter hard coal is as the sorbent material of removing hydro carbons.
In long-term operation process, above-mentioned absorption and steam stripped combination process, occurred that stripping tower is because being polymerized the problem causing fouling more serious, have impact on stripping tower effect during its process lime set waste water; Along with the prolongation of working time, the amount that in lime set, hydrocarbons is residual is bigger than normal, accumulate and be polymerized in adsorber, sorbent material is lumpd, is difficult to regenerate, frequently need change sorbent material, and can not be up to standard and directly discharge after causing the process of technique lime set.
For solving the problem, someone proposes following improving one's methods, namely between stripping tower and adsorber, first the lime set waste water of stripping tower bottom is allowed to contact with air, the micro-benzene ethene carried secretly in lime set waste water is first polymerized under aerobic conditions, simultaneously by catalyst action, makes the Fe in waste water 2+ion is all oxidized to Fe 3+, and hydrolysis forms Fe (OH) 3precipitation, the physics interception function interception of catalyzed dose, thus remove most iron ion; Also have adopt by with air mixed after this waste water by being equipped with the packing layer of kicker magnet particle, adsorbed the ferric oxide flowed through in packing layer water pointedly by the action of a magnetic field, in water, most ferric oxide is namely by this packing layer cut-off filter.Then by the waste water after above-mentioned thick deironing again by being equipped with the accurate filter of ceramic membrane or wire netting sintering, further except the catalyst dust, metal oxide etc. in anhydrating.Removing metal object waste water again through by hydrophilic and hate oil tunica fibrosa manufacture coalescent facility, further by hydro carbons remove, finally waste water is put into existing hard coal adsorber, thus obtains qualified purification lime set.
Even if there be above improving one's methods, the present inventor thinks that it also exists following problem.First, these methods are not all considered from the source generated to reduce metal oxide or hydro carbons; Secondly, when the operation of technique condensate stripper is abnormal, have and enter follow-up deironing containing cinnamic hydro carbons in a large number and remove in the equipment of hydro carbons, styrene polymerization can block subsequent processes system, not only affect water purification to reclaim, and change deironing and remove hydro carbons packing material cost high.
Summary of the invention
The object of the present invention is to provide a kind of method purifying the technique lime set produced in preparing phenylethylene from dehydrogenation of phenylethane process, inject wherein before acid dehydrogenation liquid enters air cooler amine substance and, from source reduce corrosion; Before technique lime set enters stripping tower, inject water-soluble stopper, the polymerization fouling of component in stripping such as vinylbenzene in effective Controlling Technology lime set, increases hydro carbons stripping clearance in this tower; In addition, the technique lime set after stripping, directly enters air stripping tower without cooling, improves the thermo-efficiency of subsequent combustion removing hydrocarbons.
A kind of method purifying the technique lime set produced in preparing phenylethylene from dehydrogenation of phenylethane process, comprise following process: the acid dehydrogenation liquid after ethylbenzene dehydrogenation reaction is through quencher water filling chilling, air cooler cools, and oily water separation obtains technique lime set, then carries out stripping tower water vapor stripping; It is characterized in that, injecting amine substance neutralization to entering in the acid dehydrogenation liquid before quencher; Technique lime set adds water-soluble stopper before entering stripping tower; Technique lime set after stripping directly enters air stripping tower without cooling, is introduced in steam superheater by the gas of the air stripping tower top after stripping and burns; Technique lime set after stripping enters sand tower and filters.
For the too low erosion rate that causes of pH value of reaction product after preventing ethylbenzene dehydrogenation and dehydrogenation liquid increases, and in acid dehydrogenation liquid, iron concentration is too high, controls the pH value of acid dehydrogenation liquid 6.5 ~ 7.5, thus farthest avoids corrosion;
The amine substance used in technique scheme all can from market purchasing, described amine substance can be methoxy propanamine, morpholine, thanomin and quadrol, N methyldiethanol amine, (2-hydroxyethyl)methylamine), N, one in N-dimethylethanolamine, tetrahydroglyoxaline etc., especially with quadrol as well; Water-soluble stopper also can obtain from market purchasing, can be diethyl hydroxylamine, N, N-bis-(1,4-first amyl group)-1,4-phenylenediamine, N, one in 2-dihydroxyl-N-(2-hydroxy propane) propylamine, Sodium Nitrite, 4-methoxyphenol etc., is preferably N, 2-dihydroxyl-N-(2-hydroxy propane) propylamine;
The amount injecting amine substance in oxytropism dehydrogenation liquid is 1-60ppm (datum quantity is acid dehydrogenation liquid), and the amount of the water-soluble stopper added is 1-60ppm (datum quantity is technique lime set).
For vinylbenzene in effective Controlling Technology lime set etc. is in the intrasystem polymerization of stripping tower, fouling, improves the stripping decreasing ratio of ethylbenzene, vinylbenzene hydro carbons, before technique lime set enters stripping tower, inject water-soluble stopper; The polymerization fouling of component in stripping such as vinylbenzene in effective Controlling Technology lime set, increases hydro carbons stripping clearance in this tower;
After stripping, the technique lime set of 80-90 DEG C directly enters air stripping tower without cooling, further stripping removes the hydrocarbons such as toluene, ethylbenzene and vinylbenzene wherein, and vinylbenzene is polymerized under aerobic conditions remove, there is provided the air needed for burning by the steam superheater of stripping gas introducing device, improve the thermo-efficiency of steam superheater;
Technique lime set after stripping enters in air stripping tower from air stripping tower napex first block of plate, and air passes in air stripping tower from bottom, and stripping air is out as the air needed for the steam superheater fuel used in vinylbenzene preparation process.
Described stripping tower tower top working pressure is normal pressure, and the air of stripping air needed for styrene device superheater fuel, is directly introduced in stripping tower from air by induced draft fan, and the stripping gas steam of hydrocarbon-containifirst is burnt at superheater.
The tower tray of described air stripping tower is sieve-board type, and required number of theoretical plate is 5 ~ 15 pieces, is excellent with 10 ~ 12 pieces.
Gas-water ratio in air stripping tower is 500-2000.
Technique lime set enters in tower from stripping tower napex first block of plate, and stripping air passes into from bottom;
After stripping, technique lime set enters sand tower again, except polystyrene, the hydro carbons becoming colloidal and metallic compound that deoxidation is formed.Filler in sand tower is preferably homogeneous particle diameter quartz sand.
Particularly, detailed process of the present invention comprises: employing ethylbenzene is raw material, and water vapor is as diluent media, and in the conversion zone that catalyzer is housed, ethylbenzene dehydrogenation generates cinnamic process; Acid dehydrogenation liquid inject before quencher place, air cooler amine substance and, then through the final condensation of heat exchange, be divided into two-layer up and down in gun barrel.Upper strata is mainly containing the oil phase of reaction product, send product separation system to be separated further; Lower floor is technique lime set; Then technique lime set is sent into coalescer, further oily water separation enters lime set processing unit; Inject water-soluble stopper wherein before technique lime set admission stripper, the hydro carbons that stripping goes out and a small amount of water vapor are recycled in gun barrel and reclaim hydro carbons after condensation; After stripping, the waste water of 80-90 DEG C enters air stripping tower, and adopt the direct stripping again of air, together blown out by the hydro carbons such as the benzene in waste water, toluene, ethylbenzene and vinylbenzene with air, stripping pneumatic transmission enters steam superheater burning; When waste water flows through sand tower, in waste water, polystyrene, catalyst dust and macrobead metallic compound are removed; After above-mentioned process, again waste water is sent into existing deironing, waste-oil scavenger, make its water quality reach waste heat boiler feedwater index.
In the present invention, by adding the sour environment with acid dehydrogenation liquid in amine substance, decrease because corroding the generation causing iron ion; Inject water-soluble stopper by entering tower place in stripping tower lime set, in effective Controlling Technology lime set, the component such as vinylbenzene is in the intrasystem polymerization of stripping tower, fouling, improves the stripping decreasing ratio of ethylbenzene, vinylbenzene hydro carbons; Adding of these two kinds of materials can from Sources controlling or the amount decreasing metallics and hydro carbons; In air stripping tower, reducing the dividing potential drop of hydrocarbons in tower further by passing into air, removing the hydrocarbons in the technique lime set under overhead streams simultaneously to greatest extent, especially can by polymerization removing vinylbenzene under aerobic conditions; The tower reactor service temperature of air stripping tower is 75 ~ 83 DEG C, and tower top working pressure is normal pressure.Stripping overhead gas return mechanism steam superheater, by burning removing hydrocarbons, realize tail gas environment protection emission, simultaneously normal temperature air through with the heat exchange of 80-90 DEG C of technique lime set after, the temperature of air can improve 10 ~ 65 DEG C, and the heat energy of recovery improves the thermo-efficiency of steam superheater; Adopt sand tower pre-filtering waste water, can effectively remove polystyrene in waste water, metallic compound and salt and ion thereof, these metal oxides and salt and ion thereof are mainly derived from the loss of burn into catalyst dust and catalyst component thereof.Through said process process, in waste water, the content of suspended substance is less than or equal to 5mg/L, the total content of iron is less than or equal to 1.0mg/L, the total content 15mg/L of hydrocarbons, again this waste water is joined in existing smart deironing and removing equipment for oil, obtain qualified purification lime set water, and its long-term operation can be ensured.
Accompanying drawing explanation
In order to more clearly the present invention is described, below by flow-chart form, the present invention is further elaborated, but be not limitation of the present invention.
Fig. 1 is the technique lime set purification process technique schematic flow sheet of preparation of styrene from ethylbenzene of the present invention.
In figure: 1-Ethylbenzene Dehydrogenation Reactor; 2-quencher; 3-air cooler; 4-gun barrel; 5-technique lime set pump; 6-coalescer; 7-technique condensate filter; 8-stripper condenser; 9-stripping tower; 10-stripping tower reactor liquid pump; 11-air stripping tower; 12-sand-bed filter; 13-induced draft fan; 14-steam superheater.
Embodiment
Be further described the present invention below in conjunction with embodiment, the present invention is not limited to following embodiment.
The method of the technique lime set produced in preparing phenylethylene from dehydrogenation of phenylethane process of the present invention, under the effect of catalyzer, in Ethylbenzene Dehydrogenation Reactor 1, there is dehydrogenation reaction in ethylbenzene; Reacted generation gas is added through quencher 2 chilling after waste heat boiler heat-obtaining, and add amine substance at quencher place; Generation gas is entered gun barrel 4 after air cooler 3 cools, lower layer process lime set is by technique lime set pump 5 warp let-off coalescer 6, technique condensate filter 7 and stripper condenser 8, and its admission stripper go to wherein add water-soluble stopper after send in stripping tower 9, meanwhile, the hydro carbons that goes out of stripping stripped overhead and a small amount of water vapor are recycled in gun barrel and reclaim hydro carbons after condensation; After stripping, the technique lime set of 80-90 DEG C is sent into air stripping tower 11 by stripping tower reactor liquid pump 10 and is pushed up, induced draft fan 13 is adopted to deliver at the bottom of stripping tower by air, the hydro carbons such as the benzene in waste water, toluene, ethylbenzene and vinylbenzene are together blown out with air, using the required air of the steam superheater 14 of stripping gas introducing device as burning; 5th step: the technique lime set after stripping is flow through sand tower 12.Through said process process, in waste water, the content of suspended substance is less than or equal to 5mg/L, and the total content of iron is less than or equal to 1.0mg/L, the total content 15mg/L of hydrocarbons, again this waste water is joined in existing smart deironing and removing equipment for oil, obtain qualified purification lime set water, and ensure its long-term operation.
Embodiment 1:
Certain produces 120000 tons of styrene devices per year, and technique lime set amount is 30-50t/h, and the amine substance added is N methyldiethanol amine, and the amount added is 15ppm (datum quantity is acid dehydrogenation liquid); The stopper added is diethyl hydroxylamine, the amount added is 15ppm (datum quantity is technique lime set), stripping tower gas-water ratio is 1000, stripping gas temperature after steam superheater improves 32.5 DEG C, in effluent quality, the content of suspended substance is 4mg/L, the total content of iron is 0.5mg/L, and the total content of hydrocarbons is 10mg/L.
Embodiment 2:
Certain produces 120000 tons of styrene devices per year, and producing technique lime set amount is 30-50t/h, and the amine substance added is quadrol, and the amount added is 35ppm (datum quantity is acid dehydrogenation liquid); The stopper added is N, 2-dihydroxyl-N-(2-hydroxy propane) propylamine, the amount added is 15ppm (datum quantity is technique lime set), the gas-water ratio of stripping tower is 500, stripping gas temperature after steam superheater improves 65 DEG C, in effluent quality, the content of suspended substance is 2mg/L, and the total content of iron is 0.3mg/L, and the total content of hydrocarbons is 9.0mg/L.
Embodiment 3:
Certain produces 120000 tons of styrene devices per year, and producing technique lime set amount is 30-50t/h, and the amine substance added is for being methoxy propanamine, and the amount added is 20ppm (datum quantity is acid dehydrogenation liquid); The stopper added is Sodium Nitrite, the amount added is 40ppm (datum quantity is technique lime set), the gas-water ratio of stripping tower is 1200, stripping gas temperature after steam superheater improves 27 DEG C, in effluent quality, the content of suspended substance is 2mg/L, the total content of iron is 0.3mg/L, and the total content of hydrocarbons is 7.0mg/L.
Embodiment 4:
Certain produces 120000 tons of styrene devices per year, and producing technique lime set amount is 30-50t/h, and the amine substance added is tetrahydroglyoxaline, and the amount added is 45ppm (datum quantity is acid dehydrogenation liquid); The stopper added is N, N-bis-(1,4-first amyl group)-1,4-phenylenediamine, the amount added is 56ppm (datum quantity is technique lime set), and the gas-water ratio of stripping tower is 2000, stripping gas temperature after steam superheater improves 16 DEG C, in effluent quality, the content of suspended substance is 2mg/L, and the total content of iron is 0.1mg/L, and the total content of hydrocarbons is 7.2mg/L.
Embodiment 5:
Certain produces 120000 tons of styrene devices per year, and producing technique lime set amount is 30-50t/h, and the amine substance added is thanomin, and the amount added is 50ppm (datum quantity is acid dehydrogenation liquid); The stopper added is 4-methoxyphenol, the amount added is 30ppm (datum quantity is technique lime set), the gas-water ratio of stripping tower is 1800, stripping gas temperature after steam superheater improves 18 DEG C, in effluent quality, the content of suspended substance is 2mg/L, the total content of iron is 0.3mg/L, and the total content of hydrocarbons is 5.0mg/L.

Claims (13)

1. one kind purifies the method for the technique lime set produced in preparing phenylethylene from dehydrogenation of phenylethane process, comprise following process: the acid dehydrogenation liquid after ethylbenzene dehydrogenation reaction is through quencher water filling chilling, air cooler cools, and oily water separation obtains technique lime set, then carries out stripping tower water vapor stripping; It is characterized in that, injecting amine substance neutralization to entering in the acid dehydrogenation liquid before quencher; Technique lime set adds water-soluble stopper before entering stripping tower; Technique lime set after stripping directly enters air stripping tower without cooling, is introduced in steam superheater by the gas of the air stripping tower top after stripping and burns; Technique lime set after stripping enters sand tower and filters.
2. method according to claim 1, is characterized in that, described amine substance is for being selected from the one in methoxy propanamine, morpholine, thanomin, quadrol, N methyldiethanol amine, (2-hydroxyethyl)methylamine), N, N-dimethylethanolamine and tetrahydroglyoxaline.
3. method according to claim 1, it is characterized in that, described water-soluble stopper is selected from diethyl hydroxylamine, N, N-bis-(1,4-first amyl group)-1, one in 4-phenylenediamine, N, 2-dihydroxyl-N-(2-hydroxy propane) propylamine, Sodium Nitrite and 4-methoxyphenol.
4. the method according to any one of claims 1 to 3, is characterized in that, the add-on of amine substance is 1 ~ 60ppm of acid dehydrogenation liquid.
5. the method according to any one of claim 1-3, is characterized in that, the add-on of water-soluble stopper is 1 ~ 60ppm of technique lime set.
6. method according to claim 1, is characterized in that, through in amine substance and after the pH value of acid dehydrogenation liquid be 6.5 ~ 7.5.
7. method according to claim 1, is characterized in that, the tower reactor service temperature of air stripping tower is 75 ~ 83 DEG C.
8. the method according to claim 1 or 7, is characterized in that, the tower top working pressure of air stripping tower is normal pressure.
9. method according to claim 1, is characterized in that, the temperature of the technique lime set after stripping is 80-90 DEG C.
10. the method according to claim 1 or 9, it is characterized in that, technique lime set after stripping enters in air stripping tower from air stripping tower napex first block of plate, air passes in air stripping tower from bottom, and stripping air is out as the air needed for the steam superheater fuel used in vinylbenzene preparation process.
11. methods according to claim 1, is characterized in that, the tower tray of described air stripping tower is sieve-board type, and required number of theoretical plate is 5 ~ 15 pieces.
12. methods according to claim 1 or 11, it is characterized in that, the gas-water ratio in described air stripping tower is 500-2000.
13. described methods according to claim 1, it is characterized in that, the filler in described sand tower is homogeneous particle diameter quartz sand.
CN201310316846.1A 2013-07-25 2013-07-25 A kind of method purifying the technique lime set produced in preparing phenylethylene from dehydrogenation of phenylethane process Active CN104341069B (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1247837A (en) * 1998-09-16 2000-03-22 中国石油化工集团公司 Waste water treating process for the preparation of styrene from ethylbenzene
WO2008030235A2 (en) * 2006-09-06 2008-03-13 Fassbender Alexander G Ammonia recovery process

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1247837A (en) * 1998-09-16 2000-03-22 中国石油化工集团公司 Waste water treating process for the preparation of styrene from ethylbenzene
WO2008030235A2 (en) * 2006-09-06 2008-03-13 Fassbender Alexander G Ammonia recovery process

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
苯系有机中间体废水治理技术现状与发展;梁诚;《安全、健康和环境》;20031031;第3卷(第10期);第30-32页 *

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