CN109395534A - It is a kind of for handling the method and apparatus of ethyl alcohol exhaust gas - Google Patents
It is a kind of for handling the method and apparatus of ethyl alcohol exhaust gas Download PDFInfo
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- CN109395534A CN109395534A CN201710696033.8A CN201710696033A CN109395534A CN 109395534 A CN109395534 A CN 109395534A CN 201710696033 A CN201710696033 A CN 201710696033A CN 109395534 A CN109395534 A CN 109395534A
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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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- 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
- B01D53/1431—Pretreatment by other processes
- B01D53/145—Pretreatment by separation of solid or liquid material
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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
- B01D53/1487—Removing organic compounds
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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
- B01D53/1493—Selection of liquid materials for use as absorbents
-
- 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
- B01D53/18—Absorbing units; Liquid distributors therefor
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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
- C07C29/74—Separation; Purification; Use of additives, e.g. for stabilisation
- C07C29/76—Separation; Purification; Use of additives, e.g. for stabilisation by physical treatment
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C31/00—Saturated compounds having hydroxy or O-metal groups bound to acyclic carbon atoms
- C07C31/02—Monohydroxylic acyclic alcohols
- C07C31/08—Ethanol
-
- 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
- B01D2252/10—Inorganic absorbents
- B01D2252/103—Water
-
- 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
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- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
- Gas Separation By Absorption (AREA)
Abstract
A method of for handling ethyl alcohol exhaust gas, comprising: be delivered to ethyl alcohol exhaust gas and absorb processing equipment to isolate tail gas and ethanol water；Tail gas is discharged into atmosphere, ethanol water is cached；After ethanol water after caching reaches preset concentration, the separation of hypergravity molecule is carried out to ethanol water, the ethyl alcohol after obtaining water and purification；Isolated water is recycled to and is absorbed in processing equipment, to supplement absorbing liquid.Method of the present invention has many advantages, such as that cost of investment is low, saves operating cost and the energy.
Description
Technical field
The present invention relates to environmental protections and air contaminant treatment field.It is useless for handling ethyl alcohol that the invention particularly relates to one kind
The method and its equipment of gas.
Background technique
The mankind arrange in the modern industry especially such as production process of chemical plant, steel plant, pharmaceutical factory and coking plant
Release toxic pollution gas.Social progress make the mankind to the living environment locating for oneself more stringent requirements are proposed,
Environmental protection administrations at different levels are also increasingly stringenter the limitation of Air Pollutant Emission.
In the technique or engineering for generating ethyl alcohol exhaust gas for being granulated in the technical process such as pharmacy, cosmetics, food, one
As industrial alcohol (ethyl alcohol) is become into medicine body ingredient, cleaning equipment components, disinfection etc. for being granulated, helping to dissolve organic principle
Process.Especially used in pharmaceutical operations using ethyl alcohol as wetting agent or dispersing agent.The ethyl alcohol that concentration is 95% is being pelletized
The high particle containing sugar can be made to be uniformly dispersed in the process, the ethyl alcohol that concentration is 70% can make the particle aggregation high containing sugar.Due to
Ethyl alcohol volatilization is fast, therefore largely uses in pharmaceutical operations, and ethyl alcohol input cost is more.When pharmaceutical equipment or system carry out changing wind
When heat extraction, concomitant drugs dust enters in the tail gas of discharge the ethyl alcohol largely to volatilize in a gaseous form, causes non-in emission
Methane organic compound emission is exceeded, drug dust discharge is exceeded.
In addition, industrial alcohol concentration of emission is more than 500mg/m in the granulation and enrobing processes of general pharmaceutical operations3, even
Up to 2000mg/m3More than, higher than the lower limit of explosion, belong to inflammable and explosive dangerous exhaust.Therefore, it generallys use in spray column
It is safe and reliable processing mode that absorbing liquid, which absorbs ethyl alcohol,.But a large amount of second can be generated in traditional spray column absorption technique
Alcohol waste liquid, pharmaceutical factory is to handle ethyl alcohol waste liquid to pay considerable operating cost to special waste liquid treatment station every year thus.It is logical
After normal waste liquid treatment station gathers the ethyl alcohol waste liquid being collected into and all waste liquids, 800~1000 DEG C or more high temperature are carried out
It is discharged after decomposition.For this purpose, causing the waste of high liquid waste processing facility cost, operating cost height and a large amount of absorbing liquids.
Summary of the invention
An object of the present invention is to provide a kind of method for handling ethyl alcohol exhaust gas, to solve to exist in the prior art
At high cost, the ethyl alcohol absorbing liquid of ethyl alcohol liquid waste processing the technical issues of largely wasting.
Another object of the present invention is to provide a kind of equipment for handling ethyl alcohol exhaust gas, for implementing above-mentioned processing
The method of ethyl alcohol exhaust gas recycles ethyl alcohol and absorbing liquid to realize, and saves operating cost.
In order to solve the above technical problems, an aspect of of the present present invention provides a kind of method for handling ethyl alcohol exhaust gas, comprising:
Processing equipment is absorbed by being delivered to preferably through the ethyl alcohol exhaust gas after dust-filtering to isolate the tail gas that can be discharged
And ethanol water, wherein the absorbing liquid absorbed in processing equipment includes water；The ethanol water is cached to default
Concentration；The separation of hypergravity molecule is carried out to the ethanol water for reaching the preset concentration, the second after obtaining water and purification
Alcohol；Water obtained after separation is delivered in the absorption processing equipment, to supplement absorbing liquid.
Wherein, the ethanol water is cached can include: the ethanol water is delivered to circulation liquid case.
Wherein, water obtained after separation is delivered in the absorption processing equipment can include: by water obtained after separation
The absorption processing equipment is delivered to after the circulation liquid case.
Wherein, the preset concentration of the ethanol water after the caching are as follows: concentration of alcohol can be 35~45%, preferably
Concentration is 40%.
Wherein it is possible to carry out hypergravity molecule point with the ethanol water treating capacity of the revolving speed of 1000r/min, 650kg/h
From step, the ethyl alcohol volumetric concentration after being purified is 92~98%, preferably 95%.
Wherein, the absorption processing equipment includes single-stage spray column, and the ethyl alcohol that the single-stage spray column absorbs is water-soluble
Liquid is delivered to circulation liquid case, and the water obtained after separation is also delivered to the circulation liquid case, and mixed with the ethanol water
The single-stage spray column is delivered to after conjunction.
Wherein, the absorption processing equipment includes level-one spray absorber and second level spray absorber, and the method is also wrapped
It includes:
By the step of successively passing through level-one spray-absorption and second level spray-absorption after ethyl alcohol exhaust gas progress dust-filtering, and/
Or
The ethanol water that the level-one spray column and second level spray column absorb is delivered to respective circulation fluid respectively
Case, the water obtained after separation are also delivered to the circulation liquid case respectively, and individually or in the respective circulation liquid case
It is delivered to the level-one spray column and second level spray column respectively after ethanol water mixing.
Another aspect of the present invention also provides a kind of equipment for treatment of pharmacy ethyl alcohol exhaust gas, comprising:
Processing equipment is absorbed, receives the ethyl alcohol exhaust gas preferably through filter dust to isolate the cleaning tail gas that can be discharged and second
Alcohol solution, wherein the absorbing liquid absorbed in processing equipment includes water；Caching is from described in the absorption processing equipment
The circulation liquid case of ethanol water；Hypergravity separator, by the ethanol water for reaching predetermined concentration from the circulation liquid case
Solution is separated, and the ethyl alcohol after obtaining water and purification, the water obtained after separation is delivered to the circulation liquid case.
Wherein, the equipment of the present invention for treatment of pharmacy ethyl alcohol exhaust gas, further includes: in the circulation liquid case and institute
Settable first pump between hypergravity separator is stated, for being pumped into institute to the hypergravity separator through the circulation liquid case
State ethanol water and water pump for isolating the hypergravity separator return the circulation liquid case with the ethyl alcohol
Aqueous solution mixing；And the second pump of setting between the circulation liquid case and the absorption processing equipment, for through the circulation
Liquid case is to the absorption processing equipment pump return water.
Wherein, the absorption processing equipment can inhale for single-stage spray absorber, twin-stage spray absorber or multi-stage spray
Receive tower, preferably twin-stage spray absorber.
Wherein, the twin-stage spray absorber has respective circulation liquid case, and the respective circulation liquid case passes through general pipeline
Line is connect with the hypergravity separator.
Wherein, the hypergravity separator may include deflection type overgravity rotary bed and rectifier unit.
Wherein, the rectifier unit includes reboiler and condenser, makes the ethanol water shape from the circulation liquid case
At alcohol gas, then together with the water in the ethanol water through it is described it is high-gravity rotating bed separate, the water isolated from
It is described it is high-gravity rotating bed by it is described first pump blowback to the circulation liquid case, through the high-gravity rotating bed second isolated
Alcohol exports after the condenser to ethyl alcohol storage container.
Wherein, from the ethanol water for absorbing processing equipment and the water from the hypergravity separator in institute
It states and is mixed in circulation liquid case.
Wherein, the spray absorber end is provided with demisting layer, so that the removal effect of steam and fog reaches 95%
More than.
The above-mentioned technique for being used to handle ethyl alcohol exhaust gas absorbs ethyl alcohol as absorbing liquid by using water, has saved cost；
In addition, by using hypergravity molecule isolation technics, and water obtained after separation is recycled to absorb to supplement in processing equipment and is inhaled
Liquid is received, the recycling to absorbing liquid is realized, thus greatly reduces the cost of processing waste liquid containing ethyl alcohol, it is energy saving, it reduces
The waste of ethyl alcohol.In addition, the technique of above-mentioned processing ethyl alcohol exhaust gas makes exhaust emissions also and can reach country to powder through the invention
The standard of dirt, non-methane hydrocarbon emission.
Detailed description of the invention
Fig. 1 is the method flow diagram of the processing ethyl alcohol exhaust gas of an embodiment of the present invention.
Fig. 2 is the equipment schematic diagram of the processing ethyl alcohol exhaust gas of an embodiment of the present invention.
Fig. 3 is the equipment schematic diagram of the processing ethyl alcohol exhaust gas of another embodiment of the present invention.
Wherein: 1,11,1a- spray absorber；2,12, the pump of 2a- first；3,13,3a- circulation liquid case；4,14,4a- concentration
Detection device；5- hypergravity separator；6,16, the pump of 6a- second；7- reboiler；8- is deflection type overgravity rotary bed；9- condensation
Device；17- ethyl alcohol storage container.
Specific embodiment
Fig. 1 show the method flow diagram of processing ethyl alcohol exhaust gas according to an embodiment of the present invention.With treatment of pharmacy mistake
For the ethyl alcohol exhaust gas generated in journey, but the present invention is not limited to pharmacy procedures.It is equally applicable to such as Cosmetic Manufacture or food
In the prilling of production etc..
With reference to Fig. 1, this method may include following multiple steps.It will be understood by those skilled in the art that can be according to specific
Production technology situation and field condition the following detailed description of each step is accepted or rejected and is combined.Therefore following implementation
Mode should not be interpreted as to unique sequence of steps of the invention and combined restriction.
Firstly, being handled ethyl alcohol exhaust gas by separating treatment equipment to separate tail gas and ethanol water.Specifically,
As shown in Figure 1, being divided since the exhaust gas of the volatile matter containing ethyl alcohol generated in pharmacy procedure generally entails drug dust
It can be first filtered to remove chalk dust removing (step S101) before from processing step.
Upon completion of filtration, it will be delivered to absorption processing equipment by the ethyl alcohol exhaust gas of filtering and carries out absorption processing step.
According to the amount for the ethyl alcohol exhaust gas being collected into, absorbing processing step be can choose using single-stage spray-absorption or multi-stage spray absorption
Step.For ease of description, processing equipment is correspondingly absorbed for using second level spray-absorption step in the present embodiment
Using twin-stage spray absorber.As shown in step S102 and S103, spray ethyl alcohol exhaust gas by level-one spray-absorption and second level
It absorbs, so that ethyl alcohol exhaust gas is sufficiently absorbed by the absorbing liquid in the spray absorber, isolates cleaning tail gas and ethyl alcohol is water-soluble
Liquid.Wherein, the absorbing liquid in spray absorber includes water.
After second level spray-absorption step carries out separating treatment, that is, it may separate out ethanol water and be free of or only
Have a small amount of ethyl alcohol cleaning tail gas (tail gas ethanol content be lower than 20mg/m3).Then, cleaning tail gas is discharged into atmosphere, through examining
Surveying the cleaning tail gas being discharged into atmosphere can reach country to drug dust discharge standard, non-methane hydrocarbon emission standard.
In step S105, will be obtained after above-mentioned separating treatment from level-one spray absorber and second level spray absorber
Ethanol water is cached respectively into the circulation liquid case respectively connecting with firsts and seconds spray absorber.Furthermore it is possible to two
Concentration detection apparatus, such as densimeter is respectively set in a circulation liquid case, for detecting the concentration of ethyl alcohol in circulation liquid case.
When the densimeter in respectively circulation liquid case detects the solubility of the ethanol water of the caching in respectively circulation liquid case
When reaching preset concentration (such as 40%), then subsequent processing can be respectively enterd, ethyl alcohol is separated from water.For example, ethyl alcohol is water-soluble
Liquid inputs in hypergravity molecule separation equipment, with the ethanol water treating capacity pair of the revolving speed of such as 1000r/min, 650kg/h
The ethanol water executes hypergravity molecule separating step (step S106), to obtain the ethyl alcohol after water and purification.
Inventors noted that hypergravity molecule may be made to separate when the preset concentration of ethanol water is lower than 35%
Step execution frequency is excessively high, is unfavorable for energy saving and cost.When preset concentration is higher than 45%, ethanol water is easily become
Aqueous vapor or fog are unfavorable for ethyl alcohol recycling.
It is 95% that concentration of alcohol after the purification of hypergravity molecule separating step, which can reach volume ratio,.Can be by concentration
It is medium that 95% ethyl alcohol returns to the pharmaceutical operations being delivered to for being granulated and being coated, and/or is diluted to 70%-75% for other
In process (step S108).The water isolated in hypergravity molecule separating step is pumped into corresponding circulation liquid case, with into one
Walk blowback spray absorber (step S107) corresponding with circulation liquid case.Thus, it can be achieved that the cycling and reutilization of absorbing liquid, thus
The waste of absorbing liquid is avoided, operating cost is saved.Alternatively, can also be by water obtained after separation in hypergravity molecule separating step
Spray absorber is not pumped directly by circulation fluid case.In this case, although reducing from hypergravity molecule separating step
In the water obtained after separation process and step that are cached in circulation liquid case, but need circulation liquid case and spray absorber it
Between increase additional control device with control enter spray absorber absorbing liquid pressure and other parameters, to it is technical require compared with
Height increases cost of implementation.Therefore, it is seemed by the way of circulation liquid case caching and increases process procedure and equipment cost, but
The effect actually obtained is to keep the design of technique and operation more simplified, while reducing equipment cost.
It is according to the method for the processing ethyl alcohol exhaust gas of above embodiment, using setting for different processing ethyl alcohol exhaust gas below
Standby embodiment.
Embodiment 1
Fig. 2 show the equipment schematic diagram of the processing ethyl alcohol exhaust gas of an embodiment of the present invention.The equipment can be used for implementing
The method of processing ethyl alcohol exhaust gas described above.Still by taking pharmaceutical technology as an example.
As shown in Fig. 2, the equipment of processing ethyl alcohol exhaust gas can include: conventional set can be used in filter cartridge dust remover (not shown)
It is standby to implement, for carrying out dust-filtering to ethyl alcohol exhaust gas, the ethyl alcohol exhaust gas after exporting chalk dust removing；Spray absorber 1,11, to next
Absorption processing is carried out from the ethyl alcohol exhaust gas after the filtering dust excessively of filter cartridge dust remover, makes ethyl alcohol exhaust gas sufficiently by the spray-absorption
Absorbing liquid in tower absorbs, and isolates cleaning tail gas and ethanol water, wherein the absorbing liquid in spray absorber 1,11 includes
Water；The gas emission device (not shown) and circulation liquid case 13, gas emission device connecting with spray absorber 11 inhale spray
The cleaning exhaust emissions of the discharge of tower 11 is received into atmospheric environment；The circulation liquid case 3 being connect with spray absorber 1.Circulation liquid case 3,
13 may be provided with concentration detection apparatus 4,14 with the concentration of substance in detection case (such as ethyl alcohol)；Hypergravity separator 5 has second
Alcohol delivery outlet is to export the ethyl alcohol isolated；Fluid communication device (not shown), one end is connected to circulation liquid case 3,13, another
End be connected to hypergravity separator 5 and circulation liquid case 3 and hypergravity separator 5 between be disposed with the first pump 2,
The first pump 12 is disposed between circulation liquid case 13 and hypergravity separator 5；First pump 2,12 for through circulation liquid case 3,13 to
Hypergravity separator 5 is pumped into ethanol water and the water for isolating hypergravity separator 5 is transmitted back to circulation liquid case
3,13；It is arranged in the second pump 6 between circulation liquid case 3 and spray absorber 1, is arranged in circulation liquid case 13 and spray absorber 11
Between the second pump 16, the second pump 6,16 is for from circulation liquid case 3,13 to spray absorber 1,11 pump return waters.
Twin-stage spray absorber 1,11 ends are also provided with demisting layer, so that the removal effect of steam and fog reaches
95% or more.Demisting layer can be using conventional equipment, and details are not described herein.
In this example, circulation liquid case had not only stored the ethanol solution from spray absorber, but also storage is rotated from hypergravity
The water of bed isolated, and there is no by the way of storing two kinds of liquid respectively.The design both may be implemented supplement and absorb
Liquid can also save equipment cost to reduce the purpose of waste, at the same time it can also realize extend in equipment running process it is overweight
The unlatching period of power separator saves operation cost.
Wherein, hypergravity separator includes deflection type overgravity rotary bed 8 and rectifier unit.The rotation of deflector type hypergravity
Bed can be using deflection type overgravity rotary bed, the root diameter of the model SE750-2P of Zhong Hong Genie et Environnement
For 750mm, two layers of rotor, housing diameter 830mm, a height of 550mm.In this example, rectifier unit includes reboiler 7 and condenser
9.Using continuous rectification mode, treating capacity can reach 650kg/h.
As shown in Fig. 2, the unabsorbed ethyl alcohol exhaust gas of spray absorber 1 is discharged from the top of spray absorber 1, inhaled from spray
The lower part for receiving tower 2 enters in spray absorber 2, and the cleaning tail gas obtained with this is discharged through gas emission device (not shown).
Ethanol water after absorbing ethyl alcohol in spray absorber 1 flows into circulation liquid case 3 from the bottom of spray absorber 1
In.When detecting that the concentration of alcohol in circulation liquid case reaches preset vol concentration such as 40% by concentration detection apparatus 4, first
Ethanol water in circulation liquid case 3 is pumped into hypergravity separator 5 through main pipe line by pump 2.Similarly, in spray absorber 11
Ethanol solution after absorbing ethyl alcohol flows into circulation liquid case 13 from the bottom of spray absorber 11.When concentration detection apparatus 14 is shown
When concentration of alcohol in circulation liquid case reaches preset vol concentration 40%, the first pump 12 will recycle ethanol water warp in liquid case 13
Main pipe line is pumped into hypergravity separator 5.Compared with recycling liquid case 13, the ethanol water concentration recycled in liquid case 3 is easier
Reach preset concentration.Usual two circulations liquid case will not reach preset concentration simultaneously, thus convey second to separator when difference
Alcohol solution.
When opening hypergravity separator 5, ethanol water forms alcohol gas after main pipe line flows into reboiler 7,
It is separated together with the water in ethanol water through high-gravity rotating bed 8.The water isolated is from high-gravity rotating bed 8 through main pipe line point
Not by the first 2 blowbacks of pump to circulation liquid case 3, by the first 12 blowbacks of pump to circulation liquid case 13.It is isolated through high-gravity rotating bed 8
Ethyl alcohol exports after condenser 9 into ethyl alcohol storage container 17.
Embodiment 2
Fig. 3 show the equipment schematic diagram of the processing ethyl alcohol exhaust gas of an embodiment of the present invention.The equipment can be used for implementing
The method of processing ethyl alcohol exhaust gas described above.Still by taking pharmaceutical technology as an example.
As shown in figure 3, the embodiment of the present embodiment and the embodiment of embodiment 1 the difference is that only, second is handled
The equipment of alcohol exhaust gas only includes one group of absorption processing equipment and a circulation liquid case.
The equipment for handling ethyl alcohol exhaust gas can include: filter cartridge dust remover (not shown) conventional equipment can be used to implement, be used for
Dust-filtering is carried out to ethyl alcohol exhaust gas, the ethyl alcohol exhaust gas after exporting chalk dust removing；Spray absorber 1a, to from filter cartridge dust remover
Ethyl alcohol exhaust gas after crossing filtering dust carries out absorption processing, inhales ethyl alcohol exhaust gas sufficiently by the absorbing liquid in the spray absorber
It receives, isolates cleaning tail gas and ethanol water；Air transporting arrangement (not shown), one end of air transporting arrangement are connected to filter
Cylinder deduster, the other end are connected to spray absorber 1a and are handled；The gas emission device connecting with spray absorber 1a is (not
Show) and circulation liquid case 3a, the cleaning tail gas discharge that spray absorber 1a is discharged gas emission device；With spray absorber 1a
The circulation liquid case of connection, circulation liquid case 3a may be provided with concentration detection apparatus 4a with the concentration of substance in detection case (such as ethyl alcohol)；
Hypergravity separator 5a has ethyl alcohol delivery outlet to export the ethyl alcohol isolated；Fluid communication device (not shown), one end
It is connected to circulation liquid case 3a, the other end is connected to hypergravity separator 5a and separates dress with hypergravity in circulation liquid case 3a
It sets and is respectively disposed with the first pump 2a between 5a.First pump 2a is used to be pumped into ethyl alcohol to hypergravity separator 5a through circulation liquid case 3a
Aqueous solution and for through hypergravity separator 5a to circulation liquid case 3a pump return water；It is arranged in circulation liquid case 3a and spray absorber
The second pump 6a, the second pump 6a between 1a is used to be recycled liquid case 3a to spray absorber 1a pump return water.
As shown in figure 3, ethyl alcohol exhaust gas is after spray absorber 1a absorption, obtained cleaning tail gas is through gas emission device
(not shown) discharge.
Ethanol water after absorbing ethyl alcohol in spray absorber 1a flows into circulation fluid from the bottom of spray absorber 1a
In case 3a.When concentration detection apparatus 4a shows that the concentration of alcohol in circulation liquid case reaches preset vol concentration such as 40%, first
Pump 2a will recycle ethanol water in liquid case 3a and be pumped directly into hypergravity separator 5a.
When opening hypergravity separator 5a, ethanol water forms alcohol gas after flowing into reboiler 7, with aqueous solution
In water separated together through high-gravity rotating bed 8.The water isolated from high-gravity rotating bed 8 directly by first pump 2a blowback to
It recycles in liquid case 3a.The ethyl alcohol isolated through high-gravity rotating bed 8 exports after condenser 9 into ethyl alcohol storage container 17.
The method of inventor's processing ethyl alcohol exhaust gas according to the present invention, which uses in above-described embodiment 1 certain pharmaceutical factory, handles second
The equipment of alcohol exhaust gas is tested.Need to pay about 8000 yuan of expense treatment of pharmacy technique weekly in the past to waste water treatment plant
In generate weekly 6.5 tons of ethyl alcohol waste liquid.Now using the technique of above-mentioned treatment of pharmacy ethyl alcohol exhaust gas and equipment to ethyl alcohol waste liquid
Recycling, treating capacity 650kg/h, feed ethanol concentration are volume ratio 40%, are operated by reflux ratio 2.5, are only needed weekly
Continuous rectification 10 hours, obtain alcohol concentration up to about 2.6 tons of ethyl alcohol of 95% or more, 3.9 tons of recycle-water, input cost about 800
Member, cost-saved 90%.
Claims (10)
1. a kind of method for handling ethyl alcohol exhaust gas, comprising:
Ethyl alcohol exhaust gas is delivered to and absorbs processing equipment to isolate the tail gas and ethanol water that can discharge, wherein the suction
The absorbing liquid received in processing equipment includes water,
The ethanol water is cached to preset concentration,
The separation of hypergravity molecule is carried out to the ethanol water for reaching the preset concentration, the second after obtaining water and purification
Alcohol,
Water obtained after separation is delivered in the absorption processing equipment, to supplement absorbing liquid.
2. the method according to claim 1, wherein including: by the ethyl alcohol by ethanol water caching
Aqueous solution is delivered to circulation liquid case；It includes: that will obtain after separation that water obtained after separation, which is delivered in the absorption processing equipment,
To water be delivered to the absorption processing equipment after the circulation liquid case.
3. method according to claim 1 or 2, which is characterized in that the preset concentration of the ethanol water after the caching
Reach 35~45% for concentration of alcohol, preferred concentration 40%.
4. method according to claim 1 or 3, which is characterized in that the absorption processing equipment includes single-stage spray column, institute
It states the ethanol water that single-stage spray column absorbs and is delivered to circulation liquid case, the water obtained after separation is also delivered to described
Liquid case is recycled, and is delivered to the single-stage spray column after mixing with the ethanol water.
5. method according to claim 1-3, which is characterized in that the absorption processing equipment includes level-one spray
Absorption tower and second level spray absorber, the method also includes:
By the step of successively passing through level-one spray-absorption and second level spray-absorption after ethyl alcohol exhaust gas progress dust-filtering, and/or
The ethanol water that the level-one spray absorber and second level spray column absorption tower obtain is delivered to respective circulation respectively
Liquid case, the water obtained after separation are also delivered to the circulation liquid case respectively, and individually or in the respective circulation liquid case
Ethanol water mixing after be delivered to the level-one spray absorber and second level spray absorber respectively.
6. a kind of equipment for handling ethyl alcohol exhaust gas, comprising:
Processing equipment is absorbed, receives ethyl alcohol exhaust gas to isolate the tail gas and ethanol water that can discharge, wherein at the absorption
The absorbing liquid managed in equipment includes water,
The circulation liquid case from the ethanol water for absorbing processing equipment is cached,
The ethanol water for reaching predetermined concentration from the circulation liquid case is separated, is obtained by hypergravity separator
Ethyl alcohol after water and purification, the water obtained after separation are delivered to the circulation liquid case.
7. equipment according to claim 6, which is characterized in that further include being separated in the circulation liquid case and the hypergravity
The first pump being arranged between device, for being pumped into the ethanol water to the hypergravity separator through the circulation liquid case
The circulation liquid case is returned with the water pump for separating the hypergravity separator to mix with the ethanol water；And
The circulation liquid case and it is described absorb the second pump being arranged between processing equipment, for through the circulation liquid case to the absorption
Processing equipment pump return water.
8. equipment according to claim 6, which is characterized in that the absorption processing equipment is single-stage spray absorber, double
Grade spray absorber or multi-stage spray absorption tower, preferably twin-stage spray absorber；And/or
The twin-stage spray absorber has respective circulation liquid case, and the respective circulation liquid case is surpassed by main pipe line with described
Gravitational separation device connection.
9. according to the described in any item equipment of claim 6-8, which is characterized in that the hypergravity separator includes deflector type
High-gravity rotating bed and rectifier unit；With
The rectifier unit includes reboiler and condenser, and the ethanol water from the circulation liquid case is made to form ethanol gas
Body, then together with the water in the ethanol water through it is described it is high-gravity rotating bed separate, the water isolated is from described overweight
Power revolving bed is by the first pump blowback to the circulation liquid case, through described in the high-gravity rotating bed ethyl alcohol warp isolated
It exports after condenser to ethyl alcohol storage container；And/or
Wherein followed with the water from the hypergravity separator described from the ethanol water for absorbing processing equipment
It is mixed in ring liquid case.
10. according to the described in any item equipment of claim 6-9, which is characterized in that the absorption processing equipment end is provided with
Demisting layer.
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| CN201710696033.8A CN109395534B (en) | 2017-08-15 | 2017-08-15 | Method and equipment for treating ethanol waste gas |
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| CN109395534B CN109395534B (en) | 2021-05-07 |
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