CN110038369A - A kind of method that eddy flow combination ultrafiltration membrane removes ultra tiny droplet in industrial gasses - Google Patents
A kind of method that eddy flow combination ultrafiltration membrane removes ultra tiny droplet in industrial gasses Download PDFInfo
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- CN110038369A CN110038369A CN201910350059.6A CN201910350059A CN110038369A CN 110038369 A CN110038369 A CN 110038369A CN 201910350059 A CN201910350059 A CN 201910350059A CN 110038369 A CN110038369 A CN 110038369A
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- cyclone
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
- B01D45/16—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by the winding course of the gas stream, the centrifugal forces being generated solely or partly by mechanical means, e.g. fixed swirl vanes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/54—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms
- B01D46/543—Particle separators, e.g. dust precipitators, using ultra-fine filter sheets or diaphragms using membranes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/20—Combinations of devices covered by groups B01D45/00 and B01D46/00
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/14—Ultrafiltration; Microfiltration
- B01D61/145—Ultrafiltration
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
- Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
Abstract
The invention discloses the methods of ultra tiny droplet in a kind of eddy flow combination ultrafiltration membrane removal industrial gasses, comprising the following steps: (1) industrial gas is passed through in level-one cyclone, obtains primary purifying air-flow；(2) the preliminary purification air-flow that step (1) obtains is passed through in second cyclone, obtains double purification air-flow；(3) purification gas is discharged after filtering by ultrafiltration membrane in the double purification air-flow being discharged in step (2)；(4) ultrafiltration membrane in step (3) is cleaned using Membrane cleaning liquid, discharge cleaning waste liquid can reuse after air-drying；Two-stage eddy flow+ultrafiltration membrane defogging method in the present invention selects two-stage cyclone separation process, selects biggish cyclone ratio of height to diameter, can reach higher purification efficiency with lesser occupied area, significantly promote the removal efficiency of ultra tiny droplet；Ultrafiltration membrane technique is selected to realize the concentration and enrichment to object gas using the infiltration rate difference of gas with various molecule driven by pressure.
Description
Technical field
The present invention relates to cyclone separation process and ultrafiltration membrane technique fields more particularly to a kind of eddy flow combination ultrafiltration membrane to remove
The method of ultra tiny droplet in industrial gasses.
Background technique
During the social production of medicine, chemical industry, petrochemical industry, power generation etc., such as pickling, plating, electrolysis, relieving haperacidity can make
The substances such as sulfuric acid, hydrochloric acid, nitric acid, organic solvent are used, certain amount, liquid phase droplet not of uniform size can be carried secretly in the gas phase,
To production and environment be all it is harmful, need to try to be removed.Droplet mainly due to liquid surface evaporate, with water condensation and
It is formed, in addition, having bubble generation when chemically reacting, floats to explosion after liquid level, drop also goes out therewith.In droplet
Poisonous and hazardous substance there are many containing, property is also different, such as contains acid solution, lye and organic solvent, will affect
Its reaction process, can corrode or occluding device and instrument etc.；If not dispelling direct emission, it also will form " white cigarette ", influence people
The visual field, more seriously pollute the environment, influence the health of people.
For example, in organosilicon material production process chlorination hydrogen feedstock impurities removal, hydrolyzed through dimethyldichlorosilane, chlorine
Change in hydrogen mostly containing the ultra tiny droplet of the different siloxanes of partial size, is produced in hidden trouble of equipment, product quality and enterprise employee health
There is more problem Deng various aspects.In addition, ultra tiny droplet is as one of an important factor for inducing " haze ", partial size exists
Between 0.1~100 μm.More attention with society to " haze " problem, it is also constantly deep with regard to the research of demisting technology both at home and abroad
Enter.Currently, baffle plate type, cyclone type, electric defogging equipment etc. are common ultra tiny droplet method for removing.Baffle plate type, whirlwind
The biggish droplet of the easily separated partial size of formula demister (10 μm of >), electrostatic precipitator separate lesser droplet (≤10 μm of partial size).Respectively
The research of kind of demister be particle suffered active force in the gas flow equilibrium state and the characteristics of motion.These types is separated below
Mechanism, the advantage and disadvantage of method are illustrated item by item:
Baffle plate type demisting technology mainly utilizes inertial impaction to act on, and droplet is as the motion collision of air-flow is in baffle plate
On, and in its diffusion into the surface, the effect of gravity makes droplet gradually form biggish drop with air motion to turning, due to
It turns to centrifugal force, make drop increasing with the frictional force of corrugated sheet and surface tension etc., when the self gravity of drop is greater than
When the climbing power of gas and the resultant force of surface tension of liquid, drop is just separated.This demister has resistance small, is not easy
Obstruction, the advantages that treating capacity is big, but the partial size of isolated fine mist is larger, using being subject to certain restrictions.
Cyclone type demisting technology is mainly based on the effect of centrifugal force, and air-flow tangentially enters cyclonic separation with some speed
Drop is thrown away under the influence of centrifugal force and is collided on barrel by device, and gas is flowed out from the top of separator, and drop is because being kept off
The effect of water plate returns, so that drop separation be made to come out.This demister demisting efficiency is higher, and treating capacity is big, thus application is wider,
But the pressure loss is larger, and cost of equipment is relatively high, and equipment land occupation is also larger.
What electric demisting technology mainly utilized is the effect of electric field force, using electrion, is formed between cathode and anode powerful
Electric field, air molecule is ionized, and generates a large amount of electronics and positive and negative ion, under the action of electric field force make orientation fortune
It is dynamic, while keeping droplet particle charged, these charged particles under the action of electric field force, also make directed movement, reach anode plate
On, on pole plate, charged particle discharges electronics, and droplet is collected, and has achieved the purpose that demisting.With high dust collection efficiency, pressure
Lose that small, easy to operate, energy consumption is small, the partial size of separation droplet is smaller, but investment cost is higher, and it is short that electrode replaces the time limit, maintenance
It is costly.
Above-mentioned various isolation technics have its scope of application, and different demisting skills is mainly selected according to the size of droplet
Art.Ultra tiny droplet is net in the complexity of contained droplet type and actual production operational process in actual industrial gas
Change the bad status of efficiency, urgently needs to find a kind of purification method for being suitable for removing multiclass droplet in actual condition.
Summary of the invention
The purpose of the present invention is to solve the above the deficiencies in the prior art, propose a kind of eddy flow combination ultrafiltration membrane removal
The method of ultra tiny droplet in industrial gasses, comprising the following steps:
(1) industrial gas is passed through in level-one cyclone along level-one cyclone outer barrel tangential direction, obtains primary purifying
Air-flow, gained primary purifying air-flow are discharged by level-one cyclone outlet, and the ultra tiny droplets particles of centrifuge separation are along level-one eddy flow
Device barrel slides to bottom, flow to level-one storage tank through level-one cyclone sewage pipe and collects；
(2) the preliminary purification air-flow that step (1) obtains is passed through second level eddy flow along second cyclone outer barrel tangential direction
In device, double purification air-flow is obtained, gained double purification air-flow is exported through second cyclone and is discharged, and ultra tiny droplets particles are by two
Secondary trapping flow to secondary storage tank along second cyclone sewage pipe by gravity and collects；
(3) purification gas is discharged after filtering by ultrafiltration membrane in the double purification air-flow being discharged in step (2)；
(4) ultrafiltration membrane in step (3) is cleaned using Membrane cleaning liquid, discharge cleaning waste liquid can be again after air-drying
It uses.
Preferably, the level-one cyclone diameter height compares for 1 ﹕ (5~7)；The second cyclone diameter height compares for 1 ﹕ (10
~15).
Preferably, the level-one storage tank and secondary storage tank are same storage tank.
Preferably, the ultrafiltration membrane is one in inorganic material film, organic film material and inorganic-organic composite membrane material
Kind.
Preferably, Membrane cleaning liquid used in step (4) combines the property of ultra tiny droplet to be chosen:
Under normal conditions, select distilled water as Membrane cleaning liquid；
The citric acid or sodium citrate solution or mass fraction that selection mass fraction is 1%-2% are 0.4%-0.5%'s
HCl solution cleans the pollution of the hyperfiltration membrane assembly as caused by molysite or carbonate solution droplet；
Select the NaClO solution that mass fraction is 0.1%-0.2% and the NaOH solution that mass fraction is 0.1%-0.2%
Mixed solution is formed, the pollution of the hyperfiltration membrane assembly as caused by organic matter droplet and active bio solution droplet is cleaned；
Selecting mass fraction is the H of 0.2%-0.3%2O2The NaOH solution group that solution and mass fraction are 0.2%-0.3%
At mixed solution, the pollution of the hyperfiltration membrane assembly as caused by glutami acid fermentation liquor droplet is cleaned；
Selecting mass fraction is the formalin of 1%-1.5%, cleans the film group as caused by bacterial solution ultra tiny droplet
Part pollution；
Select the Membrane cleaning liquid being formulated by the component of following weight percent: sodium carbonate 15%-20%, sodium phosphate
5%-7%, sodium hydroxide 1%-3%, ethylenediamine tetra-acetic acid 0.3%-0.5%, surplus are water, and cleaning is led by colloidal solution droplet
The pollution of the hyperfiltration membrane assembly of cause；
Select the Membrane cleaning liquid being formulated by the component of following weight percent: neopelex 7%-
10%, surfactant 6%-9%, sodium hydroxide 0.3%-0.5%, natrium carbonicum calcinatum 0.1%-0.2%, sodium phosphate 9%-
12%, the sodium silicate solution 8%-10% that mass fraction is 10%, surplus are water, and control pH value is 5.5-8.5, cleaning when cleaning
The pollution of hyperfiltration membrane assembly caused by oily waste water；
Select the Membrane cleaning liquid being formulated by the component of following weight percent: phosphoric acid 2%-4%, ethylenediamine tetra-acetic acid
Disodium 0.3%-0.6%, LBOW scavenger specially 0.3%-0.5%, surplus is water, and it is ultra tiny to clean protein-based and grease type
It is polluted caused by droplet.
Beneficial effects of the present invention are as follows:
(1) present invention can be more thoroughly to work relative to other methods using two-stage eddy flow+ultrafiltration membrane defogging method
Ultra tiny droplet in industry gas is removed, and is suitable for engineer application, selects biggish cyclone ratio of height to diameter, increases cyclone
Height, increase fluid in the residence time of eddy flow field, higher purification efficiency can be reached with lesser occupied area, significantly
The removal efficiency of ultra tiny droplet is promoted, realizes and continues demisting；The height of cyclone is unable to indefinite extension, because of the increasing of axial distance
Greatly, lead to the decrease of eddy flow effect, two-stage eddy flow ensure that the removing effect of the droplet of larger particles, the high ratio of second cyclone diameter
Greater than the high ratio of level-one cyclone diameter, so that the droplet of different-grain diameter is available to be classified the purpose removed, so that ultra tiny droplet
Particle is 30-50g/m in entrance concentration3In the case where, it can capture the ultra tiny droplet particle that minimum grain size is 0.5-1 μm,
And installation area is effectively reduced, guarantee service life, reduce demisting operating cost, is easy to use and safeguards；
(2) gaseous state ultrafiltration membrane is separately set, driven by pressure, by suction of each component in gas on polymeric membrane surface
Attached ability and the difference in film in dissolution-diffusion are come real using the infiltration rate difference of gas and ultra tiny droplet molecule
Now to the separation of gas and droplet, small droplets particles in gas it is direct intercept, the machines such as inertial collision and Brownian movement
Under the comprehensive function of reason, it is intercepted at ultrafiltration membrane side, and clean gas is discharged in the ultrafiltration membrane other side；In addition, for not
Connatural ultra tiny droplet is easily replaced different membrane materials and is removed, further increases the purification of ultra tiny droplet
Efficiency.
Detailed description of the invention
Fig. 1 is the flow chart of the method for ultra tiny droplet in eddy flow+ultrafiltration membrane combination removal industrial gasses.
Specific embodiment
In order to deepen the understanding of the present invention, below in conjunction with embodiment and attached drawing, the invention will be further described, should
The examples are only for explaining the invention, is not intended to limit the scope of the present invention..
Embodiment 1
As shown in Figure 1, the present invention implements step using the method for ultra tiny droplet in eddy flow+ultrafiltration membrane removal industrial gasses
It is rapid as follows:
(1) by containing the industrial gas that mist droplet particle size is 1-10 μm, concentration is 200-500ppm (from organic silicon monomer
Synthesize exhaust gas), it is passed through in level-one cyclone along level-one cyclone outer barrel tangential direction, obtains primary purifying air-flow, at the beginning of gained
Grade purifying gas flow is discharged by level-one cyclone outlet, and the ultra tiny droplets particles of centrifuge separation slide to bottom along level-one cyclone barrel
Portion flow to level-one storage tank through level-one cyclone sewage pipe and collects, and droplet removal rate is 30%；Wherein, the diameter of level-one cyclone is high
Than for 1:6；
(2) the preliminary purification air-flow that step (1) obtains is passed through second level eddy flow along second cyclone outer barrel tangential direction
In device, double purification air-flow is obtained, gained double purification air-flow is exported through second cyclone and is discharged, and ultra tiny droplets particles are by two
Secondary trapping flow to secondary storage tank through second cyclone sewage pipe and collects, and droplet removal rate is 68%；Wherein, second cyclone
Diameter height compares for 1:10；
(3) by Inorganic Ultrafiltration Membrane purification gas is discharged, only in the double purification air-flow being discharged in step (2) after filtering
The residual concentration for changing droplet impurity in gas is 30ppm；
(4) Inorganic Ultrafiltration Membrane in step (3) is cleaned using distilled water, discharge cleaning waste liquid can be again after air-drying
Secondary use.
In the above-mentioned technical solutions, the level-one storage tank and secondary storage tank are same storage tank.
Embodiment 2
As shown in Figure 1, the present invention is implemented using the method for ultra tiny droplet in eddy flow+ultrafiltration membrane combination removal industrial gasses
Steps are as follows:
(1) by containing the industrial gas that mist droplet particle size is 1-10 μm, concentration is 200-500ppm (from organic silicon monomer
Synthesize exhaust gas), it is passed through in level-one cyclone along level-one cyclone outer barrel tangential direction, obtains primary purifying air-flow, at the beginning of gained
Grade purifying gas flow is discharged by level-one cyclone outlet, and the ultra tiny droplets particles of centrifuge separation slide to bottom along level-one cyclone barrel
Portion flow to level-one storage tank through level-one cyclone sewage pipe and collects, and droplet removal rate is 36%；Wherein, the diameter of level-one cyclone is high
Than for 1:7；
(2) the preliminary purification air-flow that step (1) obtains is passed through second level eddy flow along second cyclone outer barrel tangential direction
In device, double purification air-flow is obtained, gained double purification air-flow is exported through second cyclone and is discharged, and ultra tiny droplets particles are by two
Secondary trapping flow to secondary storage tank through second cyclone sewage pipe and collects, and droplet removal rate is 72%；Wherein, second cyclone
Diameter height compares for 1:14；
(3) by Inorganic Ultrafiltration Membrane purification gas is discharged, only in the double purification air-flow being discharged in step (2) after filtering
The residual concentration for changing droplet impurity in gas is 26ppm；
(4) Inorganic Ultrafiltration Membrane in step (3) is cleaned using distilled water, discharge cleaning waste liquid can be again after air-drying
Secondary use.
In the above-mentioned technical solutions, the level-one storage tank and secondary storage tank are same storage tank.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (5)
1. a kind of method of ultra tiny droplet in eddy flow combination ultrafiltration membrane removal industrial gasses, which is characterized in that including following step
It is rapid:
(1) industrial gas is passed through in level-one cyclone along level-one cyclone outer barrel tangential direction, obtains primary purifying air-flow,
Gained primary purifying air-flow is discharged by level-one cyclone outlet, and the ultra tiny droplets particles of centrifuge separation are along level-one cyclone barrel
Bottom is slided to, level-one storage tank is flow to through level-one cyclone sewage pipe and collects；
(2) the preliminary purification air-flow that step (1) obtains is passed through in second cyclone along second cyclone outer barrel tangential direction,
Double purification air-flow is obtained, gained double purification air-flow is exported through second cyclone and is discharged, and ultra tiny droplets particles are caught by secondary
Collection flow to secondary storage tank through second cyclone sewage pipe and collects；
(3) purification gas is discharged after filtering by ultrafiltration membrane in the double purification air-flow being discharged in step (2)；
(4) ultrafiltration membrane in step (3) is cleaned using Membrane cleaning liquid, discharge cleaning waste liquid can reuse after air-drying.
2. the method for ultra tiny droplet in a kind of eddy flow combination ultrafiltration membrane removal industrial gasses according to claim 1,
It is characterized in that, the level-one cyclone diameter height compares for 1 ﹕ (5~7)；The second cyclone diameter height compares for 1 ﹕ (10~15).
3. the method for ultra tiny droplet in a kind of eddy flow combination ultrafiltration membrane removal industrial gasses according to claim 1,
It is characterized in that, the level-one storage tank and secondary storage tank are same storage tank.
4. the method for ultra tiny droplet in a kind of eddy flow combination ultrafiltration membrane removal industrial gasses according to claim 1,
It is characterized in that, the ultrafiltration membrane is one of inorganic material film, organic film material and inorganic-organic composite membrane material.
5. the method for ultra tiny droplet in a kind of eddy flow combination ultrafiltration membrane removal industrial gasses according to claim 1,
It is characterized in that, Membrane cleaning liquid used in step (4) combines the property of ultra tiny droplet to be chosen:
Under normal conditions, select distilled water as Membrane cleaning liquid；
Select the citric acid that mass fraction is 1%-2% or the HCl that sodium citrate solution or mass fraction are 0.4%-0.5% molten
Liquid cleans the pollution of the hyperfiltration membrane assembly as caused by molysite or carbonate solution droplet；
The NaClO solution that mass fraction is 0.1%-0.2% and the NaOH solution that mass fraction is 0.1%-0.2% is selected to form
Mixed solution cleans the pollution of the hyperfiltration membrane assembly as caused by organic matter droplet and active bio solution droplet；
Selecting mass fraction is the H of 0.2%-0.3%2O2The NaOH solution composition that solution and mass fraction are 0.2%-0.3% is mixed
Solution is closed, the pollution of the hyperfiltration membrane assembly as caused by glutami acid fermentation liquor droplet is cleaned；
Selecting mass fraction is the formalin of 1%-1.5%, and cleaning membrane module as caused by the ultra tiny droplet of bacterial solution is dirty
Dye；
Select the Membrane cleaning liquid being formulated by the component of following weight percent: sodium carbonate 15%-20%, sodium phosphate 5%-
7%, sodium hydroxide 1%-3%, ethylenediamine tetra-acetic acid 0.3%-0.5%, surplus are water, are cleaned as caused by colloidal solution droplet
The pollution of hyperfiltration membrane assembly；
Select the Membrane cleaning liquid being formulated by the component of following weight percent: neopelex 7%-10%, table
Face activating agent 6%-9%, sodium hydroxide 0.3%-0.5%, natrium carbonicum calcinatum 0.1%-0.2%, sodium phosphate 9%-12%, quality
The sodium silicate solution 8%-10% that score is 10%, surplus are water, and control pH value is 5.5-8.5 when cleaning, clean oily waste water
The pollution of caused hyperfiltration membrane assembly；
Select the Membrane cleaning liquid being formulated by the component of following weight percent: phosphoric acid 2%-4%, disodium ethylene diamine tetraacetate
0.3%-0.6%, LBOW scavenger specially 0.3%-0.5%, surplus are water, clean the protein-based and ultra tiny droplet of grease type
Caused by pollute.
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| CN201910350059.6A CN110038369A (en) | 2019-04-28 | 2019-04-28 | A kind of method that eddy flow combination ultrafiltration membrane removes ultra tiny droplet in industrial gasses |
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| CN201910350059.6A CN110038369A (en) | 2019-04-28 | 2019-04-28 | A kind of method that eddy flow combination ultrafiltration membrane removes ultra tiny droplet in industrial gasses |
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| CN105792945A (en) * | 2013-12-05 | 2016-07-20 | 埃克森美孚研究工程公司 | Integrated cyclone assembly |
| US9418710B1 (en) * | 2015-06-17 | 2016-08-16 | HGST Netherlands B.V. | Nanoparticulate-trapping filter for hard disk drive |
| CN106110895A (en) * | 2016-08-08 | 2016-11-16 | 同济大学 | Embrane method is poly-drives ultrafilter membrane cleaning method during oil extraction waste water processes |
| CN107456836A (en) * | 2017-09-26 | 2017-12-12 | 成都之和环保科技有限公司 | A kind of adsoption catalysis integration waste gas pollution control and treatment equipment |
-
2019
- 2019-04-28 CN CN201910350059.6A patent/CN110038369A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101837239A (en) * | 2010-03-25 | 2010-09-22 | 澧县金辉石膏制品有限责任公司 | System for dehydration of acid mist dust of plaster and dust removal and desulfurization of fluidized bed furnace by baking by using residual heat |
| CN105792945A (en) * | 2013-12-05 | 2016-07-20 | 埃克森美孚研究工程公司 | Integrated cyclone assembly |
| US9418710B1 (en) * | 2015-06-17 | 2016-08-16 | HGST Netherlands B.V. | Nanoparticulate-trapping filter for hard disk drive |
| CN105709605A (en) * | 2015-08-13 | 2016-06-29 | 常州联江环保科技有限公司 | Alkaline cleaning agent and bactericide applicable to ultra-filtration membranes or reverse osmosis membranes |
| CN106110895A (en) * | 2016-08-08 | 2016-11-16 | 同济大学 | Embrane method is poly-drives ultrafilter membrane cleaning method during oil extraction waste water processes |
| CN107456836A (en) * | 2017-09-26 | 2017-12-12 | 成都之和环保科技有限公司 | A kind of adsoption catalysis integration waste gas pollution control and treatment equipment |
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