CN204529354U - A kind of separation system of vinylidene chloride - Google Patents
A kind of separation system of vinylidene chloride Download PDFInfo
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- CN204529354U CN204529354U CN201520167883.5U CN201520167883U CN204529354U CN 204529354 U CN204529354 U CN 204529354U CN 201520167883 U CN201520167883 U CN 201520167883U CN 204529354 U CN204529354 U CN 204529354U
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Abstract
The utility model discloses a kind of separation system of vinylidene chloride, bottom this separation system, be provided with aeration tank, top is provided with return line, aeration tank is cut off by grid the liquid-flow path that average mark is slit at least one, and each path parallel misalignment arranges, and is formed through S type passage end to end.The device that the utility model provides is high to the ground water cleaning efficiency containing organic pollutant, and handled easily, can realize automatic production.
Description
Technical field
The utility model belongs to environmental protection treatment technology, relates to the process field containing vinylidene chloride underground water, particularly a kind of separation system of vinylidene chloride.
Background technology
Vinylidene chloride (C
2h
2cl
2) be a kind of lower boiling organochlorine of synthetic for hydrocarbons, it is colourless liquid, has the smell of similar chloroform.Relative density (water=1) 1.16, specific refractory power 1.4388, molecular weight 112.99, vapour pressure 5.33kPa, is slightly soluble in water, is soluble in ether, miscible with most of organic solvent.When 20 DEG C, the solubleness of vinylidene chloride in water is 0.26% (weight), and the azeotropic point of vinylidene chloride (vinylidene chloride is 89.6%) its binary azeotrope containing water is 78.4 DEG C.
Aeration zone is the important channel connecting surface soil and waterbearing stratum, plays certain " barrier " effect to controlling groundwater pollution.Volatile organic contaminant has higher vapour pressure, water-soluble and lower organic partition ratio, viscosity, interfacial tension, they are once enter into soil, aeration zone then can be caused to pollute, pollute waterbearing stratum under certain condition, bring serious threat to environment for human survival and human health.Vinylidene chloride is mainly used as the synthetic intermediate of industrial production zellon, vinylchlorid and other preparations, is also used as the solvent of lipid, rubber, paint, phosphorus, iodine etc.Vinylidene chloride is also widely used as insecticide fumigation agent, kills the insect pest in farm crop and soil.Their pollutions in water are mainly derived from the discharge of industrial chemical factory.The same with zellon, trieline, they are also volatile organic contaminants common in underground water, within 1979, listed in the pollutent of priority acccess control " in the underground water " list by EPA (USEPA), priority pollutants in 68 kinds of water of Ye Shi China regulation.The waterhead area organic contamination investigation of main cities, China Henan shows, 1 is had in underground water, 1-Ethylene Dichloride detects, the 2006-2007 monitoring of the Organic Contamination of Groundwater thing to Henan contaminated site in continuous 2 years finds, the maximum acceptable concentration of the tap water that the concentration of vinylidene chloride has specified more than USEPA.
MHLW of Japan has issued " whether the cholangiocarcinoma that printery occurs is relevant with factory work " report in March, 2013.This report book is pointed out, long-term exposure can cause the generation of cholangiocarcinoma in high density vinylidene chloride printery.Foreign study shows: 1,1-Ethylene Dichloride belongs to typical hepatotoxic agent, during high density, first be affect central nervous system, can cause damage to important organs such as body liver kidney, cardiac muscle, respiratory system, neural system, hemopoietic systems subsequently, it has persistence, extended residual and bioconcentration in the environment.
Discharge Engineering in Shanghai Jinshan District town level centralized water supply unit, day service discharge 2.4 ten thousand t, relates to 10 villages (region), water supply population about 2.5 ten thousand people.This centralized water supply unit intake water area water-quality yellowing on August 25th, 2012, its downstream finds that the dead float for fishing of part floats.Combine investigation through Environmental Protection Agency, public security department and Bureau of Water Resources to think and may pollute for vinylidene chloride, source water water quality monitoring (WQM) on August 25 vinylidene chloride content 200 μ g/L, exceedes national drinking water standard, threatens the healthy of the regional masses that supply water.
Vinylidene chloride common are organic pollutants in soil and groundwater, easily enters in soil and groundwater with rainwater or irrigation water by eluviation, cause the pollution of soil and groundwater body.At present about the traditional method of vinylidene chloride Pollution abatement in underground water has following several:
1. active carbon adsorption
With the vinylidene chloride in charcoal absorption water source, without the need to adding any chemical reagent, technical requirements is not high, lower concentration advantages of good adsorption effect, and some materials being difficult to degrade can directly adsorb on the activated carbon.By having investigated gac dosage, adsorption time, concussion surged the factors such as plate stroke to the impact of removal effect.
This method technical maturity, simple to operate reliable for effect, but adsorption efficiency is unstable, 1, effective when 1-Ethylene Dichloride is in lower concentration, during high density, process is unstable, and the active adsorption life-span is short, carrier needs to carry out secondary desorb just can carry out circulating use, and by the solution after solvent desorption, form again the mixture containing vinylidene chloride, how to be isolated again, to need to study further.
2. aeration process repairing method
Pressurized air is injected underground water saturation zone by aeration process reparation, gas moves upward in process and causes volatile contaminant to enter gas phase from the soil body and underground water, make the air containing pollutent rise to unsatalation zone, then reach remove the object of pollutent by the process of gas phase extraction system.The based technique for in-situ remediation of this process underground water saturation zone volatile organic contaminant, owing to can the advantage of original position construction make it be used widely, be applied to molecular weight more, easily becomes the pollutent of gas phase from liquid phase.
But aeration process repairing method is easily subject to the factor impacts such as gas flow shape change, number of bubbles, bubble size, gas channel density, reduce processing power because treatment process is different simultaneously.Aeration process repairing method in force, if there is local low-permeability soil layer in zone of pollution, air and pollutent are difficult to fully contact, if there is structural crack or zone of fracture in underground water saturation zone, the air injected then easily forms preferential flow, cause aeration short circuit, greatly affect process range and treatment effect, zone of pollution is difficult to effectively be repaired.Simultaneously aeration process repairing method is also subject to water-soluble and volatile direct impact of soil response type, place uniformity, ground water table and flowing, pollutent, such that remediation efficiency declines, cost increase.
3. in situ chemical oxidation method
The oxygenant that in-situ chemical recovery technique adopts is as permanganate, Fenton reagent, hydrogen peroxide and persulphate, oxygenant is injected into underground pollution district, soil and waterbearing stratum itself are containing a large amount of virgin iron mineral, and under the effect of iron mineral catalysis, oxidizing reaction can the organic pollutant of effectively rehabilitating soil and underground water.Research shows that in-situ chemical recovery technique easily makes reparation district soil produce mineralising, makes reparation district soil compaction, bad hydraulic permeability, changes and repair district's Soil structure.
4. biological restoration
Utilize bio-inert and organic clay adsorbed bioactive bacterium, by the metabolism of biology, reduce the engineering techniques of poisonous and harmful compound in underground environment, biology in situ repairing method can process large-scale pollutent, and can complete decomposing pollutant.
Current biology in situ repairing method is an emerging technology for process underground water Organic pollutants source, the key factor of biological restoration is suitable electron acceptor(EA), and the oxygen acceptor that has been best electricity, due to this electron acceptor(EA) of deficiency of oxigen in underground environment, the simultaneously undersupply of microbial nutrition material, also makes the biological degradation of microorganism can not be lasting.
5. permeable reactive wall repairing method
Utilize and be filled with the dependent response district of Active reaction medium material, when contaminated underground water by time, pollution substance wherein and reaction medium generation physics, chemistry and biological etc. act on and be degraded, adsorb, precipitate or remove, thus sewage is purified.
But permeable coefficient tensor exists easily blocked, the its native environmental conditions such as the redox potential of underground water easily go to pot, shortcoming such as reaction wall engineering measure and running maintenance relative complex etc., add that bimetallic systems, nanotechnology cost are higher, these factors hinder further developing of permeable coefficient tensor and widely popularize.
6. original position aeration repairing method
Original position aeration process is a kind of based technique for in-situ remediation of emerging underground water volatile organic matter, below air Injection Polluted area, volatile organic compounds is resolved to airflow from underground water and causes the based technique for in-situ remediation that ground processes, enough oxygen can be provided for the aerobic microbiological in underground water to deep well injection air simultaneously, promote the Degradation of indigenous microorganism.This technology, in acceptable cost-range, can process more Polluted Groundwater, and system is easily installed and shifted, and easy and other technical combinations uses.
But because geologic framework is complicated, when injecting air and running into complete rock stratum band, loosening shatter belt or flexural deformation band, the injection air carrying volatile organic matter is difficult to penetrate above-mentioned geologic framework, when injection air runs into above-mentioned geologic framework simultaneously, atmospheric drag is large, and equipment energy consumption will be made greatly to improve.To be not only not easy volatilization but also not easily biodegradable Pollutant Treatment effect more not good.
Summary of the invention
In order to overcome above the deficiencies in the prior art, the utility model provides a kind of separation system of vinylidene chloride, has processing efficiency high, handled easily, can realize the advantage of automatic production, can process the underground water of deep layer containing organic pollutant on a large scale.
To achieve these goals, the technical solution of the utility model is as follows:
A kind of 1, the separation system of 1-Ethylene Dichloride, bottom is provided with aeration tank, top is provided with return line, the grid that wherein aeration tank is positioned essentially vertically in relation to one another cuts off the liquid-flow path that average mark is slit at least one, the parallel misalignment arrangement of each path, be formed through S type passage end to end, one end of aeration tank is provided with into water main pipeline, the other end is respectively equipped with rising pipe and return line outlet, return line one end exports with return line and is connected, the other end is connected with water inlet main pipeline, aerated conduit comprises aeration main pipeline and aeration branch pipe road, wherein aeration branch pipe road quantity at least one, an aeration branch pipe road is provided with in each path, aeration main pipeline is communicated with all aeration branch pipe roads, lotus flower aeration head is arranged on aeration branch pipe road.
Further, the separation system of described vinylidene chloride, also comprises pool wall.
Further, the separation system of described vinylidene chloride, pool wall is provided with visual forms, is conducive to effectively spreading isolated vinylidene chloride.
Further, the separation system of described vinylidene chloride, aeration tank inwall is provided with gauging line, and display underground water enters the water level elevation of aeration tank, to reach optimum handling effect.
Further, the separation system of described vinylidene chloride, aeration branch pipe road is provided with the lotus flower aeration head of at least one.
Further, the separation system of described vinylidene chloride, lotus flower aeration head is arranged vertically upward in aeration branch pipe road.
Be separated the technique of vinylidene chloride, step is as follows:
(1) containing the underground water of vinylidene chloride from water inlet main pipeline input system, along path, S-type route is input in aeration tank underground water;
(2) extraneous fresh air aeration main pipeline inputs from system bottom, and is assigned in all aeration branch pipe roads and is upwards sprayed by lotus flower aeration head, and vinylidene chloride is separated from water body, volatilization;
(3) treated water body up to standard is discharged by a rising pipe high position, and below standard water body low level enters return line, flows into aeration tank and carries out secondary treatment, circulate successively, until water body is up to standard through return line outlet.
Further, process control condition is quantity of reflux is 60-140m
3/ min, water level elevation 60-130cm, aeration time 6-24h, employing continuous aeration mode.
Further, process control condition is quantity of reflux is 85m
3/ min, water level elevation 85cm, aeration time 24h, aeration tank adopt continuous aeration mode.
Vinylidene chloride separation system disclosed in the utility model, its advantage is:
(1) owing to have employed lotus flower aeration head, liquid return tube combination treatment mode, its processing efficiency is high, has higher removal effect for high density containing the volatile organic matter in vinylidene chloride underground water.
(2) in liquid Air Exposure process, tank is divided into multiple liquid-flow path by pond body partition, containing 1,1-Ethylene Dichloride underground water, with S type path flows, is conducive to promoting liquid separation vinylidene chloride, add the duration of contact of water body and treatment facility, add the contact area containing vinylidene chloride underground water and oxygen simultaneously, improve processing efficiency.
The utility model is on the basis that previous research work in-depth is summed up, to process groundwater sources 1, 1-Ethylene Dichloride zone of pollution is object, for the deficiency that existing treatment technology exists, propose in a kind of aeration tank process flowed into containing lotus flower aeration head, by 1, the treatment system that 1-Ethylene Dichloride is separated, the relatively existing application treatment facility of this device and technique have significantly innovates improvement, especially its superiority more outstanding in process underground reservoir, this device processing efficiency is high, handled easily, automatic production can be realized, this is the underground water of extensive process deep layer containing organic pollutant, a kind of high-efficient development prospect is provided.
Accompanying drawing explanation
Fig. 1 is the overall schematic of the vinylidene chloride separation system described in the utility model embodiment 1;
Fig. 2 is the vertical view of the vinylidene chloride separation system described in the utility model embodiment 1;
Fig. 3 is the positive elevational schematic view of the vinylidene chloride separation system described in the utility model embodiment 1;
In above Fig. 1-Fig. 3,1 is water inlet main pipeline, and 2 is aeration main pipeline, and 3 is aeration branch pipe road, and 4 is lotus flower aeration head, and 5 is pool wall, and 6 is return line, and 7 is return line outlet, and 8 is visual forms, and 9 is rising pipe, and 10 is aeration tank, and 11 is grid, and 12 is gauging line.
Fig. 4 be under different water level elevation aeration time to the effect diagram of vinylidene chloride clearance;
Embodiment
Below in conjunction with accompanying drawing, the vinylidene chloride separation system that the utility model provides is further described.
Embodiment 1
As Figure 1-3, the vinylidene chloride separation system that the utility model provides, bottom is provided with aeration tank 10, and top is provided with return line 6.One end of aeration tank 10 is provided with into water main pipeline 1, and the other end is respectively equipped with rising pipe 9 and return line outlet 7, and return line 6 one end and return line export 7 and be connected, and the other end is connected with water inlet main pipeline 1.
In aeration tank 10, be arranged vertically multiple grid 11 along water inlet main pipeline to the direction of water outlet, adjacent grid is parallel, equidistant, staggered arrangement; Aeration tank is divided into multiple liquid-flow path by grid, and adjacent path parallel misalignment arranges, is formed through S type passage end to end.
Aerated conduit comprises aeration main pipeline 2 and aeration branch pipe road 3, wherein aeration branch pipe road 3 quantity at least one, aeration main pipeline 2 is communicated with all aeration branch pipe roads 3, each aeration branch pipe road 3 is upwards provided with the lotus flower aeration head 4 of at least one, promote 1, the evaporation of 1-Ethylene Dichloride and oxygenolysis, impel water body to present the flowing of S type along path simultaneously.
Pool wall 5 is provided with visual forms 8, is conducive to effectively spreading isolated vinylidene chloride.
Aeration tank inwall is provided with gauging line 12, and display underground water enters the water level elevation of aeration tank, to reach optimum handling effect
Be separated the technique of vinylidene chloride, step is as follows:
(1) containing the underground water of vinylidene chloride from water inlet main pipeline 1 input system, underground water is input in aeration tank 10 along the S-type route in path;
(2) extraneous fresh air is inputted from system bottom by aeration main pipeline 2, and is assigned in all aeration branch pipe roads 3 and is upwards sprayed by lotus flower aeration head 4, and vinylidene chloride is separated from water body, volatilization;
(3) treated water body up to standard is discharged by rising pipe 9 high position, and below standard water body low level enters return line 6, flows into aeration tank 10 and carries out secondary treatment, circulate successively, until water body is up to standard through return line outlet 7.
Below the function of parts each in the utility model is described in further details, specifically in table 1.
Each parameter declaration in table 1 water body treatment system
Above separation system is utilized to be separated vinylidene chloride in water body.First the water body containing vinylidene chloride is flowed in aeration tank 10 by water inlet main pipeline 1, make under the blocking-up of grid 11 containing vinylidene chloride underground water with S type path flows, and produce a large amount of bubble and impel vinylidene chloride to evaporate; Water body, with S type path flows, increases water body and exposes action time, vinylidene chloride is separated from water body.
Meanwhile, air entered by aeration main pipeline 2 and is finally sprayed by lotus flower aeration head 4 through aeration branch pipe road 3, impelling vinylidene chloride to evaporate and oxidation.Thus vinylidene chloride is separated from water body.
Embodiment 2
In order to the reasonableness of test design, it is made to reach best treatment effect, by above 1,1-Ethylene Dichloride separation system is to 1, the test of 1-Ethylene Dichloride clearance and influence factor carry out orthogonal test, and verify the reasonableness designed and optimal operating parameter, test-results is as follows:
In order to the reasonableness of test design, it is made to reach best treatment effect, by aeration tank to 1, the test of 1-Ethylene Dichloride clearance and influence factor orthogonal test, the reasonableness designed and optimal operating parameter are verified, test-results is as follows: 1. aeration tank is to vinylidene chloride clearance test-results and analysis
Figure 4 shows that aeration tank is to vinylidene chloride removal behavior curve, wherein ordinate zou is with vinylidene chloride clearance, characterizes the removal effect of vinylidene chloride, and X-coordinate is aeration time.When quantity of reflux is certain, along with the growth of aeration time, vinylidene chloride clearance constantly increases, and this also illustrates that the vinylidene chloride in aeration tank constantly reduces in time
Fig. 4 is that 60cm, 85cm and 130cm tri-kinds is unlike under water level elevation, 1,1-Ethylene Dichloride clearance reaches the highest time, from the trend of its broken line, when water level elevation is 85cm, through 24 hours, aeration tank was to 1, the removal effect of 1-Ethylene Dichloride is best, and clearance is up to 85%.
2. quadrature factor hydraulic test
Utilize orthogonal test, the experimental result of dry method anaerobic treatment equipment is analyzed and researched, in dry method anaerobic treatment equipment, aeration time, water level elevation and quantity of reflux are major influence factors, three factors are to equipment use efficiency important, according to these three factorial effect scopes, the experimental factor and the level design that set them are shown in Table 2.
Table 2 orthogonal test somatomedin experimental factor and level
Wherein: water level elevation refers to aeration tank elevation of water surface, quantity of reflux refers to that secondary treatment liquid returns the liquid flow rate of aeration tank.
Produce test design scheme, totally 15 test points; Its 12 is analysis site, point centered by 3, according to conceptual design test, bears results.
3. orthogonal experiments analysis
Adopt orthogonal test analysis method, with aeration time, water level elevation and quantity of reflux Three factors for conditional-variable, with the clearance of vinylidene chloride for response value, the ambient conditions that the vinylidene chloride of separation system is removed is optimized.Carry out testing rear acquired results according to orthogonal experimental design scheme as shown in table 3.
Table 3 test design and interpretation of result
5. the foundation of regression model and test of significance
Quadratic polynomial equation by least square fitting:
In formula:
QCL-predicated response value; x
iand x
j-independent variable(s) code value; β
0-constant term; β
i-linear coefficient; β
ij-mutual term coefficient; β
ii-quadratic term coefficient; ε-random error.
After his-and-hers watches 3 data carry out multiple regression matching, obtain clearance (QCL) and aeration time (x
1), water level elevation (x
2), quantity of reflux (x
3) regression equation:
QCL＝2.149-0.046x
1+0.076x
2+0.028x
3+0.048x
1x
2-9.075×10
-3x
1x
3+0.098x
2x
3+5.8×10
-4x
1 2-0.19x
2
2-0.089x
3 2(2)
The variance analysis of quadratic regression equation model is carried out to the result of orthogonal test, is shown in Table 4.
Table 4 quadratic regression equation the results of analysis of variance
* represents extremely remarkable, namely (p<0.01) for level extremely remarkable; * represent significantly, namely (p<0.05) for level remarkable.
The P value of the quadratic term of model is less than 0.01, shows that the impact of the synergy of three on vinylidene chloride removal effect is remarkable; And the P value of aeration time is greater than 0.05, show that it is the most obvious on vinylidene chloride removal impact.In table 4, coefficient R
2=0.8780, lose and intend item=7.99 × 10
-3for significantly, matching degree of belief is high, and it is with a high credibility that institute carries out test.
Be optimized vinylidene chloride clearance by gained Parameters in Regression Model above, what draw vinylidene chloride separation system is reasonable in design, when Parameter Conditions quantity of reflux is 85m
3/ min, water level 85cm, aeration time are 24h, adopt continuous aeration mode, economical and effective the most.Vinylidene chloride eliminating equipment clearance is 99.87% with this understanding, shows that this mathematical model has good predictability to this experimental study, truly can reflect test-results.
Claims (6)
1. the separation system of a 1-Ethylene Dichloride, it is characterized in that, bottom is provided with aeration tank (10), top is provided with return line (6), the grid (11) that wherein aeration tank (10) are positioned essentially vertically in relation to one another cuts off the liquid-flow path that average mark is slit at least one, the parallel misalignment arrangement of each path, be formed through S type passage end to end, one end of aeration tank (10) is provided with into water main pipeline (1), the other end is respectively equipped with rising pipe (9) and return line outlet (7), return line (6) one end exports (7) and is connected with return line, the other end is connected with water inlet main pipeline (1), aerated conduit comprises aeration main pipeline (2) and aeration branch pipe road (3), wherein aeration branch pipe road (3) quantity at least one, an aeration branch pipe road (3) is provided with in each path, aeration main pipeline (2) is communicated with all aeration branch pipe roads (3), lotus flower aeration head (4) is arranged on aeration branch pipe road (3).
2. the separation system of vinylidene chloride according to claim 1, is characterized in that, also comprises pool wall (5).
3. the separation system of vinylidene chloride according to claim 2, is characterized in that, pool wall (5) is provided with visual forms (8).
4. the separation system of vinylidene chloride according to claim 1, is characterized in that, described aeration tank (10) inwall is provided with gauging line (12).
5. the separation system of vinylidene chloride according to claim 1, is characterized in that, described aeration branch pipe road (3) is provided with the lotus flower aeration head (4) of at least one.
6. the separation system of vinylidene chloride according to claim 1, is characterized in that, described lotus flower aeration head (4) is arranged vertically upward in aeration branch pipe road (3).
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|---|---|---|---|---|
| CN104787827A (en) * | 2015-03-24 | 2015-07-22 | 徐州工程学院 | 1,1-dichloroethylene separation system and separation process thereof |
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