CN206570287U - A kind of device that biological methane processed is purified for biogas UF membrane - Google Patents
A kind of device that biological methane processed is purified for biogas UF membrane Download PDFInfo
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- CN206570287U CN206570287U CN201720268337.XU CN201720268337U CN206570287U CN 206570287 U CN206570287 U CN 206570287U CN 201720268337 U CN201720268337 U CN 201720268337U CN 206570287 U CN206570287 U CN 206570287U
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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Abstract
The utility model belongs to chemical separating apparatus field, is related to a kind of device that biological methane processed is purified for biogas UF membrane, it is characterised in that the device includes gas passage and fluid passage；The gas passage includes marsh gas raw materials gas storage tank, one-level membrane separator, secondary membrane separator, gas-liquid separator, the dehydration deamination reaction device being sequentially connected；The fluid passage includes ammonia absorbing reaction device, mashing pump, secondary membrane separator, one-level membrane separator, solid-liquid separator, the crystallizer being sequentially connected；There are gas passage and fluid passage simultaneously in the one-level membrane separator and secondary membrane separator.The utility model is particularly suitable for use in the purification of the biogas generated with various fermenting raw materials, purification, and the biological methane of high-purity can be made, the purpose of the treatment of wastes with processes of wastes against one another is realized.
Description
Technical field
A kind of device that biological methane processed is purified for biogas UF membrane, belongs to chemical separating apparatus field, and in particular to
Collecting carbonic anhydride and utilize equipment technical field.
Background technology
Biogas is the burning mixture that organic substance is produced through the fermentation of multiple-microorganism system under anaerobic, mainly
Composition is methane and carbon dioxide, also containing gases such as a small amount of hydrogen, carbon monoxide, hydrogen sulfide, oxygen, nitrogen.In general, in biogas
CO2Content is 25% ~ 55%（mol）, H2S contents are 0.0006% ~ 2%.Undressed biogas calorific value is in 20.16 ~ 28.98 MJ/
Nm3, energy density is low, can only be used for a long time as domestic energy, and biological methane（CH4Purity 99% ~ 100%）Calorific value
In 38.22 MJ/Nm3, engine fuel can be directly used as oil substitutes.However, CO2、H2O and H2S is in compression process
In or severe corrosion equipment and pipeline, CO in as vehicle fuel combustion process2The methane value of biogas is reduced again（Burning
Value）, in view of the two reasons, CO2、H2O、H2S must be removed before the compression, and reach China《Compressed natural gas used as vehicle fuel》's
Standard：CH4≥97%、CO2≤ 3%, H2S≤15 mg/m3。
The thinking of traditional methane purification is, the acid CO gone out using the method sub-argument such as absorption and sorption, UF membrane in biogas2、
H2S, makes CH4Purity improve to respective standard.Such as absorption process is to use MEA, DEA amine solvent, by CO in absorption tower2
Absorb, then regenerate solution, the solvent after regeneration is recycled；Absorption method is using adsorbents such as molecular sieve, mesoporous materials
By the carbon dioxide adsorption in biogas, then make adsorbent reactivation by transformation or Purge methods, the sorbent circulation after regeneration
Use.Absorb and the shortcoming of absorption method is palpus increase desulfurization process process before operation, because H2S not only poisons adsorbent, and
Make regeneration gas CO2Purity is reduced, and is unfavorable for post processing.Contain high-purity CO2Regeneration gas need to by further compression could store with
It is used for other purposes.UF membrane rule is by the CO in biogas2、H2S selectively passes through film, so that CH4The method that purity is improved, by
In being had a clear superiority without regeneration.However, complicated preprocessing process is needed using the direct purifying biogas of membrane separation process, and
In view of per-meate side sour gas purity is high, pressure is relatively low, contain CO2And H2The more difficult application of S sour gas.
Another thinking of methane purification is by substantial amounts of CO in biogas2And a small amount of H2S sour gas is straight while separation
Connect and be used, increase mass transfer force.As CN201410153531.4 proposes a kind of methane purification coproduction nano-calcium carbonate
Method, the milk of lime slurry for adding dispersant is contacted in membrane reactor with biogas, obtaining high-purity in purifying marsh gas gives birth to
While thing methane, the nano-calcium carbonate of function admirable can be obtained.However, existing patent does not refer to H2S place to go, it is clear that
Also need to be removed in advance, otherwise influence the quality of calcium carbonate.
Ardealite be in phosphoric acid production with sulfuric acid treating phosphorite when the solid slag that produces, its main component is calcium sulfate.
Generally produce 1 ton of phosphoric acid（With 100%P2O5Meter）Produce 4.8 ~ 5.0 tons of ardealites.About 20,000,000 tons of ardealite discharges every year in China,
Accumulative nearly hundred million tons of discharge capacity, is one kind of discharge capacity maximum in gypsum offscum, and the ardealite of discharge takes a large amount of soils, forms slag
Mountain, severe contamination environment.However, ardealite have water participation in the case of with CO2、NH3Occur following react：
2NH3 + CO2 + CaSO4·2H2O → CaCO3（Gu）↓ + （NH4）2SO4 + H2O
And H2S can also participate in reaction：2NH3 + H2S →（NH4）2S。
Therefore, we can contemplate the thinking using the treatment of wastes with processes of wastes against one another, be absorbed using the ardealite slurries of ammonification in biogas
CO2And H2S, separates and utilizes CO2With H2S, eliminates post-processing step, while co-producing calcium carbonate and sulphur ammonium composite fertilizer.The present invention
It is to be needed for methane purification biological methane while removing CO2And H2S characteristic is there is provided such a mass transfer apparatus, by solid
Sour gas in residue phosphogypsum and biogas is used simultaneously, turns waste into wealth, while purifying biogas, by what is isolated
Sour gas is fixed utilization, reaches treatment of wastes with processes of wastes against one another purpose.
The content of the invention
The purpose of this utility model is to provide a kind of device for purifying biological methane processed for biogas UF membrane, by solid
CO in residue phosphogypsum and biogas2And H2S is used simultaneously, while reaching methane purification, waste residue resource utilization, coproduction
The multipurpose of sulphur ammonium and calcium carbonate.
Main technical schemes of the present utility model：The device of biological methane processed is purified for biogas UF membrane, its feature exists
Include gas passage and fluid passage in the device；The gas passage includes marsh gas raw materials gas storage tank, the one-level being sequentially connected
Membrane separator, secondary membrane separator, gas-liquid separator, dehydration deamination reaction device；The fluid passage includes the ammonia being sequentially connected
Absorbing reaction device, mashing pump, secondary membrane separator, one-level membrane separator, solid-liquid separator, crystallizer；The one-level UF membrane
There are gas passage and fluid passage simultaneously in device and secondary membrane separator.
Usually, the liquid in the gas and fluid passage in the one-level membrane separator and secondary membrane separator gas passage
Body completes mass transport process, the gaseous phase outlet of one-level membrane separator and the gas phase import phase of secondary membrane separator in counter current contacting mode
Even, the liquid-phase outlet of secondary membrane separator is connected with the fluid inlet of one-level membrane separator.
The membrane module that the one-level membrane separator and secondary membrane separator are used is two-stage series connection, and biogas walks fiber membrane tube
Journey, liquid slurry walks tunica fibrosa shell side.
The one-level membrane separator and secondary membrane separator use membrane module pattern for hollow-fibre membrane, and material is poly- third
One kind in alkene, polytetrafluoroethylene (PTFE), polyethylene, Kynoar, polyether sulfone, film surface apertures size is 5 ~ 10 μm.
The one-level membrane separator and secondary membrane separator are shell-and-tube, and wherein gas walks the tube side of tunica fibrosa, ardealite
Slurry walks the shell side of membrane separator.
The gas passage and fluid passage are equipped with flow control valve.
PH monitoring devices are installed on the solid-liquid separator, the control to fluid flow is realized by the pH monitoring devices
System.
The gas-liquid separator is provided with CO2Sensor, the control to biogas air inflow is realized by the sensor.
What the bottom of the solid-liquid separator was separated is solid carbonic acid calcium, and liquid obtains by-product sulphur after entering crystallizer crystallization
Ammonium compound fertilizer, while moisture gives reuse.
Advantage of the present utility model and the effect reached are：Using two-stage membrane separator by the sour gas and ammonia in biogas
Ardealite slurry counter current contacting mass transfer after change, sulphur ammonium composite fertilizer and the calcium carbonate that resourcebility is utilized are converted into by ardealite,
Biogas is purified simultaneously.Compared with traditional absorption plant, pre- desulfurized step is eliminated, without regeneration issues are considered, is grasped
Make and operating cost is low, simple to operate, floor space is small.Be particularly suitable for use in various fermenting raw materials generate biogas purification,
Purification, can be made the biological methane of high-purity, realize the purpose of the treatment of wastes with processes of wastes against one another.
Brief description of the drawings
Fig. 1 is that embodiment is used for the schematic device that biogas UF membrane purifies biological methane processed.
In figure, 1- marsh gas raw materials gas storage tanks, 2- one-level membrane separators, 3- secondary membrane separators, 4- gas-liquid separators, 5- is solid
Liquid/gas separator, 6- crystallizers, 7- dehydration deamination reaction devices, 8- mashing pumps, 9- ammonia absorbing reaction devices, 10-CO2Sensor, 11-pH
Monitoring device.
Embodiment
The present invention is described in further detail with embodiment below in conjunction with the accompanying drawings.
Embodiment：The device refer to the attached drawing 1 of biological methane processed is purified for biogas UF membrane, mainly include gas passage with
Fluid passage；The gas passage includes marsh gas raw materials gas storage tank 1, one-level membrane separator 2, the secondary membrane separator being sequentially connected
3rd, gas-liquid separator 4, dehydration deamination reaction device 7；The fluid passage includes ammonia absorbing reaction device 9, the mashing pump being sequentially connected
8th, secondary membrane separator 3, one-level membrane separator 2, solid-liquid separator 5, crystallizer 6；The one-level membrane separator 2 and secondary membrane point
From in device 3 simultaneously have gas passage and fluid passage.
In embodiment, the liquid in gas and fluid passage in one-level membrane separator 2 and the gas passage of secondary membrane separator 3
Body completes mass transport process, the gaseous phase outlet of one-level membrane separator 2 and the gas phase import of secondary membrane separator 3 in counter current contacting mode
It is connected, the liquid-phase outlet of secondary membrane separator 3 is connected with the fluid inlet of one-level membrane separator 2.
The membrane module that the one-level membrane separator and secondary membrane separator are used is two-stage series connection, and biogas walks fiber membrane tube
Journey, liquid slurry walks tunica fibrosa shell side.
The one-level membrane separator and secondary membrane separator use membrane module pattern for hollow-fibre membrane, and material is poly- third
One kind in alkene, polytetrafluoroethylene (PTFE), polyethylene, Kynoar, polyether sulfone, film surface apertures size is 5 ~ 10 μm.
The one-level membrane separator and secondary membrane separator are shell-and-tube, and wherein gas walks the tube side of tunica fibrosa, ardealite
Slurry walks the shell side of membrane separator.
The gas passage and fluid passage are equipped with flow control valve.
PH monitoring devices 11 are installed on the solid-liquid separator 5, realized by the pH monitoring devices to fluid flow
Control.
The gas-liquid separator 4 is provided with CO2Sensor 10, the control to biogas air inflow is realized by the sensor.
The embodiment method of operation：Solid slag ardealite is used to be configured to mass percentage concentration for 3% ~ 15% slurry,
Slurry is subjected to ammoniated treatment in ammonia absorbing reaction device, the absorption temperature for controlling ammonia is 0 ~ 10 DEG C, absorbed with the ammonia for ensureing slurry
Ability is maximum.Ardealite slurry after ammonification is squeezed into the shell side import of secondary membrane separator by mashing pump, while dividing from one-level film
Shell-side outlet from device comes out, and the ardealite after ammonification purifies absorption CO in secondary membrane separator2, in one-level membrane separator
Absorb CO2With a small amount of H2S.The ardealite slurry for going out one-level membrane separator enters solid-liquid separator, and calcium carbonate and ammonium sulfate are now obtained
To sufficient sedimentation separation, solid-liquid separator bottom obtains calcium carbonate, and the sulphur ammonium aqueous solution that top overflow goes out enters crystallizer,
Reuse after moisture evaporation in crystallizer, the ammonium sulfate crystallized out is used directly as sulphur ammonium composite fertilizer.
Biogas is drawn from marsh gas raw materials gas storage tank and sequentially enters one-level membrane separator and secondary membrane separator, with ammonification
CO in ardealite slurry counter current contacting, biogas2And H2S is largely removed in one-level membrane separator, in secondary membrane separator
Middle carry out CO2Deep removal is to reaching respective standard.It is the biological methane after purification to go out the biogas of secondary membrane separator, into gas
Liquid/gas separator separates moisture, subsequently into dehydration deamination reaction device, removes the moisture and Ammonia in gas, and submitting out-of-bounds makes
With.
Claims (7)
1. a kind of device that biological methane processed is purified for biogas UF membrane, it is characterised in that the device includes gas passage and liquid
Body passage；The gas passage includes marsh gas raw materials gas storage tank, one-level membrane separator, secondary membrane separator, the gas being sequentially connected
Liquid/gas separator, dehydration deamination reaction device；The fluid passage includes the ammonia absorbing reaction device, mashing pump, secondary membrane being sequentially connected
Separator, one-level membrane separator, solid-liquid separator, crystallizer；In the one-level membrane separator and secondary membrane separator simultaneously
There are gas passage and fluid passage.
2. device according to claim 1, it is characterised in that in one-level membrane separator and secondary membrane separator gas passage
Gas and fluid passage in liquid mass transport process, the gaseous phase outlet of one-level membrane separator and two are completed in counter current contacting mode
The gas phase import of level membrane separator is connected, and the liquid-phase outlet of secondary membrane separator is connected with the fluid inlet of one-level membrane separator.
3. device according to claim 1 or 2, it is characterised in that the one-level membrane separator and secondary membrane separator are adopted
Membrane module is two-stage series connection, and biogas walks tunica fibrosa tube side, and liquid slurry walks tunica fibrosa shell side.
4. device according to claim 1 or 2, it is characterised in that the one-level membrane separator and secondary membrane separator are adopted
Membrane module pattern is hollow-fibre membrane, and film surface apertures size is 5 ~ 10 μm.
5. device according to claim 1, it is characterised in that the gas passage and fluid passage are equipped with Flow-rate adjustment
Valve.
6. device according to claim 1, it is characterised in that pH monitoring devices are provided with the solid-liquid separator.
7. device according to claim 1, it is characterised in that the gas-liquid separator is provided with CO2Sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720268337.XU CN206570287U (en) | 2017-03-20 | 2017-03-20 | A kind of device that biological methane processed is purified for biogas UF membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720268337.XU CN206570287U (en) | 2017-03-20 | 2017-03-20 | A kind of device that biological methane processed is purified for biogas UF membrane |
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| Publication Number | Publication Date |
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| CN206570287U true CN206570287U (en) | 2017-10-20 |
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Address after: Liuhe District of Nanjing City, Jiangsu province 210048 geguan Road No. 699 Patentee after: China Petroleum & Chemical Corp. Patentee after: SINOPEC NANJING CHEMICAL RESEARCH INSTITUTE Co.,Ltd. Address before: Liuhe District of Nanjing City, Jiangsu province 210048 geguan Road No. 699 Patentee before: China Petroleum & Chemical Corp. Patentee before: Nanhua Group Research Institute |