CN206121466U - Multistage membrane separation natural pond gas purification device - Google Patents
Multistage membrane separation natural pond gas purification device Download PDFInfo
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- CN206121466U CN206121466U CN201621148885.0U CN201621148885U CN206121466U CN 206121466 U CN206121466 U CN 206121466U CN 201621148885 U CN201621148885 U CN 201621148885U CN 206121466 U CN206121466 U CN 206121466U
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Abstract
The utility model discloses a multistage membrane separation natural pond gas purification device, the multistage membrane module constituteed including multistage cavity, hollow fiber gas separation membrane, casing, sealing layer, permeable gas outlet and air inlet, gas outlet, the sealing layer separate into a plurality of cavitys with the casing, be provided with permeable gas outlet on the casing of each grade membrane module, first order membrane module one end is provided with the air inlet, the air inlet with hollow fiber gas separation membrane inner chamber one end intercommunication, last one -level membrane module one end is provided with the gas outlet, the gas outlet with hollow fiber gas separation membrane inner chamber other end intercommunication. Adopt the utility model discloses a multistage membrane separation natural pond gas purification device carries out purification to marsh gas, has characteristics such as the energy consumption is low, investment province, easy operation, maintenance convenience.
Description
Technical field
This utility model belongs to marsh gas purifying purification production bio-natural gas technical field, and in particular to a kind of Multistage Membranes point
From methane purifying device.
Background technology
Biogas is organic substance（Such as human and animal excreta, crop material, weeds, rubbish, sludge and city domestic sewage and industry
Organic wastewater etc.）Jing anaerobic fermentations produce with methane（CH4）For the flammable mixed gas of main component, main component is first
Alkane and carbon dioxide, wherein methane account for 55% ~ 65%, and carbon dioxide accounts for 30% ~ 45%, remaining be a small amount of hydrogen sulfide, vapor, one
Carbonoxide, hydrogen and nitrogen etc..
Biogas utilization is the process of a two-way cleaning, and biogas is produced as the energy using various organic wastes, is being eliminated
The discharge of carbon dioxide can be reduced while environmental pollution, the biogas not utilized can also be avoided（Methane）In being discharged into environment
Cause greenhouse effect.Used as a kind of reproducible green energy resource, it is utilized extraordinary economic, society and Environmental Effect to biogas
Should.The purified removal CO of biogas2、H2The impurity such as S and water, makes methane purity reach 97-98%, identical with gas component, purification
Methane afterwards is compressed again（Compressed Biogas, CBG）Automobile-used methane is just obtained, such as CNG（Compressed
Natural Gas, CNG）Equally for car use or input city natural gas pipe network is used, the automobile-used methane of 1 standard cubic meter
Equivalent to 1.1 liters of gasoline.Methane is most environmentally friendly as transport fuel, and the greenhouse gases discharged compared with gasoline, diesel oil, ethanol are most
It is low.
But biogas is before purification, due to its hydrogen sulfide and carbon dioxide content it is high, and higher water content and
More impurity, thick biogas low quality, calorific value are low, do not meet vehicle fuel and city pipeline gas standard, add storage and
Conveying is more difficult, is not suitable for large-scale commercial utilization, if by common biogas commercialization using both dangerous or not environmentally.Cause
This, is used as biogas motor vehicle fuel or input gas distributing system is used etc. before scale, industrial applications, it is necessary to first taken off
The process of the purifications such as carbon, desulfurization and dehydration, removes the impurity in biogas, improves its purity and calorific value, makes and meets corresponding mark
Accurate bio-natural gas, just can serve as after compression vehicle fuel and pipe gas.
Marsh gas purifying mainly removes CO2With a small amount of H2O、H2S, being applied to the method for marsh gas purifying purification mainly has physics
The method that method, chemical method and physical chemistry combine.At present, the method for domestic and international marsh gas purifying purification generally adopts solvent absorption
Method and solid absorption method, conventional method has pressure swing adsorption method（Molecular sieve or active carbon adsorption）, WATER-WASHING METHOD, hydramine method（It is single
Ethanolamine, diethanolamine, diglycolamine etc.）, alkaline solution method（Such as hot potash method）With sulfone amine method（Sulfolane, Polyethylene Glycol two
Methyl ether etc.）.
The problem that solid absorption method is present is that the dynamic adsorbance of adsorbent is restricted, and when processing atm number situation, is needed
Huge device, cost of investment is significantly increased, and maintenance cost is high, especially for marsh gas purifying engineering, the investment that just seems is big,
Equipment is complicated, process cumbersome.Hold agent absorption process and often absorbent separation gas is done using alkaline solution, be characterized in technical operation
, energy consumption costly compared with complicated, absorbent regeneration is big, and easily produces contaminated wastewater.In sum, existing most methods
Popular feature be that investment is big, energy consumption is big, the feature of environmental protection is poor, have the shortcomings that floor space is big, irremovable, complex process, and
Absorbent need to be frequently changed, operation cost is high.
Membrane separation technique is the new and high technology that gas separation field new development is got up.Its principle is using each in mixed gas
Gas component produces selectively dissolving diffusing phenomenon to the affinity difference of film, and gas with various component to film due to oozing
Thoroughly speed is different and realize detached purpose.With regard to methane and carbon dioxide, hydrogen sulfide system, in selective polymeric membrane
In separation material, the seepage velocity of each component gas differs nearly 10-150 times, using the principle, can be by the methane in biogas
（CH4）And carbon dioxide（CO2）, hydrogen sulfide（H2S）Separate, so as to reach the purpose of purification biogas.The method outstanding advantages
It is that reduced investment, operation cost be low, regular maintenance is convenient, it is more more economical than the separation method such as solvent absorption and solid absorption method
Property, in recent years field gradually development and application was purified in marsh gas purifying, it is a new technique with fine development potentiality.
At present, domestic membrane separation technique has some to apply in marsh gas purifying, such as Chinese patent application, Publication No.
101028579, a kind of method of purifying marsh gas by membrane separating technology is disclosed, carry out the side of two-stage series connection using two single-stage membrane modules
Formula increased membrane module quantity and gas capacity of returns carrying out marsh gas purifying, increase operation power charge；Chinese patent application, it is open
Number be 104745260A, there is provided a kind of biogas purification method and equipment, using membrance separation plus pressure-variable adsorption combination by the way of, its
A kind of membrane separation device is disclosed, including using Kynoar, used as thin film, MEDA solution, as absorbing liquid, is one-level film dress
Put；Chinese patent discloses a kind of large-sized biogas film purification separation device, and Publication No. 203741294U, device includes purification
Tank, molecular film, circular regeneration tank, circulating pump etc., in purification pot molecular film bottom be equipped with aqua calcises, the apparatus structure compared with
For complexity, and marsh gas purifying is carried out with aqueous slkali, be also easy to produce waste liquor contamination and operating cost is high；China Patent Publication No. is
203342628U, discloses a kind of container-type marsh gas purifying embrane method purification system, including desulfurization dewatering unit, compressor, net
Change unit, heat exchanger and film group and purify gas unit processed, its film device is to include membrane module that at least two-stage is sequentially connected, per grade
Membrane module is set up in parallel the form of many and constitutes Multistage Membranes group, increased membrane module quantity and gas capacity of returns, increases operation electricity
Take.Film device system disclosed above, its membrane module unit mostly is the form of single-stage, and low separation efficiency, the response rate are low, to keep
High-recovery, needs to increase the parallel/serial joint group of membrane module into Multistage Membranes, and need to increase gas backstreaming amount, improve cost of investment and
Operating cost.Therefore, the low marsh gas purifying membrane separation device of a kind of high efficiency, response rate height, operation energy consumption is developed, to reducing natural pond
Gas purification cost is significant.
The content of the invention
The purpose of this utility model is to overcome prior art not enough, there is provided a kind of multistage membrance separation methane purifying device,
Including plural serial stage membrane separation assemblies, previous stage membrane module length is designed with more than rear stage membrane module length, control biogas
Separation efficiency and methane recovery, without the need for permeating gas backflow, with energy consumption is low, reduced investment, simple to operate, processing cost be low, dimension
The features such as protecting simple and convenient.
To solve above-mentioned technical problem, this utility model provides a kind of multistage membrance separation methane purifying device, including multistage
Cavity, Ho llow fiber membrane for gas separation, housing, sealant, the membrane module for oozing vent outlet composition and air inlet, gas outlet, institute
Housing is separated into multiple cavities by the sealant stated, and is provided with the housing per one-level membrane module and is oozed vent outlet；First order film
Component one end is provided with air inlet, and the air inlet is connected with described Ho llow fiber membrane for gas separation inner chamber one end；Afterbody
Membrane module one end is provided with gas outlet, and the gas outlet connects with the Ho llow fiber membrane for gas separation inner chamber other end.
Further, the housing is in air-locked rustless steel, carbon steel, steel alloy, aluminium alloy, nickel alloy and titanium alloy
Any one metal material.
Further, the housing is in air-locked engineering plastics, lucite, enamel, ceramics, impermeable graphite
Any one non-metallic material.
Further, the sealant is air-locked resin binder sealing ring.
Further, the housing, sealant, cavity, Ho llow fiber membrane for gas separation, ooze vent outlet composition film group
Part is 3 ~ 6 grades, and previous stage membrane module length is more than rear stage membrane module length.
This utility model has the advantage that：
1. the length of membrane modules at different levels is set according to thick fire damp concentration, gas separation efficiency and methane recovery is improved
Rate, without the need for backflow infiltration gas, reducing energy consumption.
2. adopt Multistage Membranes modular design, for different treating capacities can flexible assembling, install and safeguard and be simple and convenient.
3. there is process is simple, floor space is little, reduced investment, the features such as simple to operation.
4. the device purification process does not produce the secondary pollutions such as waste water without extra addition reagent.
Description of the drawings
Fig. 1 is the multistage membrance separation methane purifying device structural profile schematic diagram of this utility model
Fig. 2 is the multistage membrance separation methane purifying device structure different cross section schematic diagram of this utility model
In figure：1- housings, 2- air inlets, 3- gas outlets, 4- sealants, 5- cavitys, 6- cavitys, 7- cavitys, the hollow fibres of 8-
Dimension gas separation membrane, 9- oozes vent outlet, and 10- oozes vent outlet, and 11- oozes vent outlet.
Specific embodiment
This utility model is further illustrated below in conjunction with the accompanying drawings.
As depicted in figs. 1 and 2, the multistage membrance separation methane purifying device of this utility model, including multistage cavity 5,6,7, in
Hollow fiber gas separation membrane 8, housing 1, sealant 4, ooze vent outlet 9,10,11 composition membrane module and air inlet 2, gas outlet
3, housing 1 is separated into multiple cavities 5,6,7 by described sealant 4, infiltration gas is provided with the housing 1 per one-level membrane module and is gone out
Mouth 9,10,11；First order membrane module one end is provided with air inlet 2, the air inlet 2 and the Ho llow fiber membrane for gas separation 8
Inner chamber one end connects；Afterbody membrane module one end is provided with gas outlet 3, the gas outlet 3 and the hollow fiber gas point
From the connection of the inner chamber other end of film 8.
In the multistage membrance separation methane purifying device embodiment of this utility model, the housing 1 is air-locked stainless
Any one metal material in steel, carbon steel, steel alloy, aluminium alloy, nickel alloy and titanium alloy；The housing 1 is air-locked work
Any one non-metallic material in engineering plastics, lucite, enamel, ceramics, impermeable graphite；The sealant 4 is airtight
Resin binder sealing ring.The housing, sealant, cavity, Ho llow fiber membrane for gas separation, ooze vent outlet composition film
Component is 3 ~ 6 grades, is required according to methane concentration after thick biogas inlet gas concentration and purification, determines the length of membrane module, and previous
Level membrane module length is more than rear stage membrane module length, improves control biogas separation efficiency and methane recovery, while without the need for right
Infiltration gas is flowed back.
During plant running, thick biogas is entered in Ho llow fiber membrane for gas separation 8 by appendix by the air inlet 2 of device
Chamber, the miscellaneous QI in first order membrane module, in thick biogas（Such as carbon dioxide）With methane due to separating through hollow fiber gas
The speed of film 8 is different, and faster miscellaneous QI can be entered faster in the cavity 5 of the first order membrane module infiltration rate through film,
This is infiltration gas, and is discharged by the vent outlet 9 that oozes of first order membrane module, and remaining gas（Gas containing higher methane concentration）Enter
Enter second level membrane module.The Ho llow fiber membrane for gas separation 8 of methane and miscellaneous QI Jing second level membrane module in remaining gas is further
After separation, ooze vent outlet 10 into the infiltration gas Jing second level in second level cavity 6 and discharge, remaining gas then enters third level film
Component.Remaining gas again Jing third level membrane module Ho llow fiber membrane for gas separation 8 separate after, into oozing in third level cavity 7
The ventilative Jing third level is oozed vent outlet 11 and discharges, and remaining gas then enters next stage membrane module, by that analogy, until remaining gas respectively refers to
Mark reaches bio-natural gas respective standard, then product gas are discharged from gas outlet 3, the conveying of Jing gas pipelines and as vehicle fuel or
Urban duct natural gas motorcar.
The aforementioned description to specific illustrative embodiment of the present utility model be in order to illustrate and illustration purpose.These
Description is not wishing to for this utility model to be defined to disclosed precise forms, and it will be apparent that according to above-mentioned teaching, can carry out
It is many to change and change.The purpose of selecting and describing the exemplary embodiment is that explaining certain principles of the present utility model
And its practical application, so that those skilled in the art can realize and using a variety of examples of the present utility model
Property embodiment and a variety of selections and change.Scope of the present utility model is intended to by claims and its waits similar shape
Formula is limited.
Claims (5)
1. a kind of multistage membrance separation methane purifying device, including multistage cavity（5、6、7）, Ho llow fiber membrane for gas separation（8）, shell
Body（1）, sealant（4）, ooze vent outlet（9、10、11）The multistage membrane module and air inlet of composition（2）, gas outlet（3）, it is described
Sealant（4）By housing（1）It is separated into multiple cavities（5、6、7）, per the housing of one-level membrane module（1）On be provided with infiltration gas
Outlet（9、10、11）；First order membrane module one end is provided with air inlet（2）, the air inlet（2）With the hollow fiber gas
Seperation film（8）Inner chamber one end connects；Afterbody membrane module one end is provided with gas outlet（3）, the gas outlet（3）In described
Hollow fiber gas separation membrane（8）The inner chamber other end is connected.
2. multistage membrance separation methane purifying device according to claim 1, it is characterised in that：The housing（1）For impermeable
Any one metal material in the rustless steel of gas, carbon steel, steel alloy, aluminium alloy, nickel alloy and titanium alloy.
3. multistage membrance separation methane purifying device according to claim 1, it is characterised in that：The housing（1）For impermeable
Any one non-metallic material in engineering plastics, lucite, enamel, ceramics, the impermeable graphite of gas.
4. multistage membrance separation methane purifying device according to claim 1, it is characterised in that：The sealant（4）For not
Ventilative resin binder sealing ring.
5. multistage membrance separation methane purifying device according to claim 1, it is characterised in that：The housing, sealant, chamber
Body, Ho llow fiber membrane for gas separation, the membrane module for oozing vent outlet composition are 3 ~ 6 grades, and previous stage membrane module length is more than latter
Level membrane module length.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620442582 | 2016-05-17 | ||
| CN2016204425823 | 2016-05-17 |
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| Publication Number | Publication Date |
|---|---|
| CN206121466U true CN206121466U (en) | 2017-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621148885.0U Active CN206121466U (en) | 2016-05-17 | 2016-10-29 | Multistage membrane separation natural pond gas purification device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107998841A (en) * | 2017-12-24 | 2018-05-08 | 杨正山 | A kind of rubbish landfill gas UF membrane couples microalgae carbon sequestration technique |
| CN113301982A (en) * | 2018-12-31 | 2021-08-24 | 中国石油化工股份有限公司 | Separation device and separation method |
-
2016
- 2016-10-29 CN CN201621148885.0U patent/CN206121466U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107998841A (en) * | 2017-12-24 | 2018-05-08 | 杨正山 | A kind of rubbish landfill gas UF membrane couples microalgae carbon sequestration technique |
| CN113301982A (en) * | 2018-12-31 | 2021-08-24 | 中国石油化工股份有限公司 | Separation device and separation method |
| CN113301982B (en) * | 2018-12-31 | 2023-11-14 | 中国石油化工股份有限公司 | Separation device and separation method |
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