CN103111163A - Biogas dewatering desiccant applicable to low enthalpy energy regeneration - Google Patents
Biogas dewatering desiccant applicable to low enthalpy energy regeneration Download PDFInfo
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- CN103111163A CN103111163A CN2013100727191A CN201310072719A CN103111163A CN 103111163 A CN103111163 A CN 103111163A CN 2013100727191 A CN2013100727191 A CN 2013100727191A CN 201310072719 A CN201310072719 A CN 201310072719A CN 103111163 A CN103111163 A CN 103111163A
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- CN
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- Prior art keywords
- desiccant
- biogas
- agent
- applicable
- drying
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- 239000002274 desiccant Substances 0.000 title claims abstract description 33
- 230000008929 regeneration Effects 0.000 title claims abstract description 27
- 238000011069 regeneration method Methods 0.000 title claims abstract description 27
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000003463 adsorbent Substances 0.000 claims abstract description 17
- 239000002131 composite material Substances 0.000 claims abstract description 17
- 239000002808 molecular sieve Substances 0.000 claims abstract description 16
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000002202 Polyethylene glycol Substances 0.000 claims abstract description 15
- 229920001223 polyethylene glycol Polymers 0.000 claims abstract description 15
- 238000001035 drying Methods 0.000 claims abstract description 12
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims abstract description 11
- 239000001110 calcium chloride Substances 0.000 claims abstract description 11
- 229910001628 calcium chloride Inorganic materials 0.000 claims abstract description 11
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 238000002360 preparation method Methods 0.000 claims abstract description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 22
- 150000001875 compounds Chemical class 0.000 claims description 14
- 229910052799 carbon Inorganic materials 0.000 claims description 13
- 230000005484 gravity Effects 0.000 claims description 9
- 229920000151 polyglycol Polymers 0.000 claims description 2
- 239000010695 polyglycol Substances 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 5
- 238000003795 desorption Methods 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 238000001179 sorption measurement Methods 0.000 abstract description 2
- 238000002156 mixing Methods 0.000 abstract 2
- 238000002791 soaking Methods 0.000 abstract 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 238000010521 absorption reaction Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 238000007791 dehumidification Methods 0.000 description 4
- 230000018044 dehydration Effects 0.000 description 4
- 238000006297 dehydration reaction Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 3
- 239000000741 silica gel Substances 0.000 description 3
- 229910002027 silica gel Inorganic materials 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 229910001947 lithium oxide Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 102100020895 Ammonium transporter Rh type A Human genes 0.000 description 1
- 101100301844 Arabidopsis thaliana RH50 gene Proteins 0.000 description 1
- 101150107345 Rhag gene Proteins 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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- Drying Of Gases (AREA)
Abstract
The invention relates to a biogas dewatering desiccant applicable to low enthalpy energy regeneration. A preparation process of the biogas dewatering desiccant comprises the following steps of: drying activated carbon at 120 DEG C and then cooling the activated carbon to room temperature; soaking the dried and cooled activated carbon in a polyethylene glycol solution, draining the activated carbon under a shady and cool condition, then drying the drained activated carbon at 120 DEG C to obtain a composite desiccant ready for use; mixing and drying calcium chloride and molecular sieves, which are weighed according to a mass ratio, thus obtaining a composite adsorbent ready for use; and mixing the composite desiccant ready for use and the composite adsorbent ready for use according to a mass ratio to obtain the biogas dewatering desiccant. The biogas dewatering desiccant has the advantages that the desorption generation is low in energy consumption and short in time; the desiccant is relatively long in service life and low in use cost; and drying and dehumidifying equipment is small in size. The performance index of the desiccant conforms to the technical index of moisture adsorption of a 5A molecular sieve desiccant, and the desiccant can reach 10-13 regeneration times.
Description
Technical field
The present invention relates to a kind of biogas that is applicable to low enthalpy energy regeneration and dehydrate agent.
Background technology:
The main component of biogas is methane, carbon dioxide, hydrogen sulfide, moisture, other gas componants on a small quantity.Biogas is regenerative resource, and it is to be obtained through anaerobic fermentation by organic matter.Along with updating of the production of biogas and process technology is perfect, economic benefit and social benefit that it is huge progressively show.If biogas is fully utilized and develops as a kind of energy products, just must accomplish scale production, will purify, compress, separation, canned, so as on energy commodity market with other Energy Competitions.Marsh gas purifying technique comprises desulfurization (depriving hydrogen sulphide), decarburization (carbon dioxide removal), dehydration (removing steam contained in biogas).
Usually, the dehydration of gas (dehumidifying) dry technology is comparative maturity, and the method that gas humidity (what of moisture content in expression gas) is controlled can be divided into mechanicalness and the large class of on-mechanical two.In the mechanicalness humidity control method, the weak point of the tradition compression of use or refrigeration is that energy consumption is large, working medium is unfriendly concerning environment: absorption (or absorption) or dehumidifier/air-conditioning system have its advantage from environment and the aspect such as energy-conservation, but also be unable to do without a large amount of electricity consumptions: membrane separation technique is just becoming the hot topic of dehumidifying research.The control method of on-mechanical humidity is to utilize the character of humidity adjusting material to reach the wet purpose of control, and it comprises applying solid drier, liquid absorbent, compound-dehumidifying agent, based Dehumidification Membranes, energy humidity control material etc.
In the marsh gas purifying dewatering process, usually utilize the dehydration that dehumidifies of traditional solid drier, dry adsorbent has lithia, silica gel, molecular sieve, aluminium oxide, active carbon and composite drying agent etc.Wherein, the lithia water absorption is large, but when suction thermal discharge large, affect refrigerating capacity, be corrosive simultaneously; The molecular sieve dehydration ability is low, and the alumina adsorption ability is only 50% of silica gel, and regeneration temperature high (250-350 ° of C usually), the time long (3-5h); Silica gel absorption value performance is good, economical and practical, but after adsorbing large water gaging, easily break, regeneration temperature is high, time is long, access times are restricted (is generally 10-30 time, after regeneration, drying effect and original finished product are very nearly the same for the first time, and regeneration effect reduces to 90% for the second time, after 10-30 regeneration, it is original 80% that drying effect is reduced to, and generally no longer carries out desiccant regeneration).Composite drying agent good hygroscopicity, but unstable, easy deliquescence.
Different drier has different pluses and minuses, but the common issue with that traditional drier exists is that the desorption and regeneration energy consumption is high, the time is longer, and the volume that how to reduce use cost, reduce the desorption energy consumption, extend drier service life, reduces desiccant dehumidification equipment has become the bottleneck of desiccant dehumidification technology.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of biogas that is applicable to low enthalpy energy regeneration and dehydrates agent.
The present invention solves the problems of the technologies described above with following technical scheme:
A kind of biogas that is applicable to low enthalpy energy regeneration dehydrates agent, it is characterized in that preparation method's processing step is as follows:
⑴ after dry 4-6h under 110-120 ℃, cooling is room temperature naturally with active carbon; Soak 10-12h in polyglycol solution, temperature is controlled at 45-50 ℃ again;
⑵ after will soak through polyethylene glycol active carbon cool place drains, then under 110-120 ℃ dry 4-6h, get standby composite drying agent;
⑶ 1:2 in mass ratio takes that calcium chloride mixes with 5A type molecular sieve, drying, gets standby compound adsorbent;
⑷ dehydrate agent with standby composite drying agent and standby compound adsorbent by being mixed to get biogas according to mass ratio 1:1.
The calcium chloride granularity requirements is less than 350 μ m.
Calcium chloride and molecular sieve utilize gravity or the pneumatic mode drying that drains.
Standby composite drying agent and standby compound adsorbent utilize gravity or the pneumatic mode that drains to mix.
The biogas of gained dehydrates the agent technical standard and meets 5A molecular sieve desiccant technical indicator.
The biogas of the inventive method preparation dehydrates agent, and the power consumption of its desorption and regeneration is low, and the time is short, and drier is longer service life, and use cost is low, and the volume of desiccant dehumidification equipment is little.The drier performance indications that this method makes reach 5A molecular sieve desiccant technical indicator, and regeneration times is generally at 10-30 time.
The specific embodiment
In order to realize that biogas dehydrates the regeneration of agent, major part is to adopt the energy that can produce high temperature at present, such as coal, electricity etc., use these energy that can produce high temperature to dehydrate the thermal source of agent regeneration as biogas, not only expend ample resources, and too high regeneration temperature can destroy the version of drier inside, and the biogas drier was lost efficacy, and therefore makes drier can't bear regeneration more frequently.Being based on of the application will utilize the alternative energy that can produce high temperature of natural low enthalpy energy to come regenerated methane to dehydrate agent, makes it not only to take full advantage of the energy, and can accept to regenerate more frequently, extends its service life.
Low enthalpy energy means the middle low temperature heat transport fluid below 150 ℃, producible temperature is no more than 150 ℃, so this energy can not satisfy the requirement that conventional biogas dehydrates agent regeneration, so the applicant works out and is applicable to the application's technical scheme preparation a kind of the biogas that low enthalpy energy regenerates and dehydrates agent.
The biogas that is applicable to low enthalpy energy regeneration of the present invention dehydrates agent, and preparation technology is as follows:
After commercial active carbon being placed on the baking oven inner drying 4-6h of 110-120 ℃ of temperature, naturally be reduced to room temperature in baking oven; Then add in polyethylene glycol (PEG) solution of capacity and soak 10-12h, temperature is controlled at 45-50 ℃; After polyethylene glycol soaked active carbon cool place drains, then put into dry 4-6h under baking oven 110-120 ℃, get standby composite drying agent;
Taking granularity according to mass ratio 1:2 adopts colloid mills to wear into less than 350 μ m() calcium chloride put into motionless mixer with 5A type molecular sieve and mix, utilize gravity or the pneumatic mode drying 1-2h that drains, get standby compound adsorbent;
According to mass ratio 1:1, standby composite drying agent and standby compound adsorbent are dehydrated agent by gravity or the pneumatic biogas that is mixed to get.The biogas drier technical standard that obtains meets 5A molecular sieve desiccant technical indicator.
The biogas drier that obtains should first dewater to biogas after baking 2-3h under 60-70 ℃ before inserting on the drier column plate again.
Embodiment 1
1, commercial active carbon 65kg toasts 4h at 120 ℃ of temperature, after cooling to room temperature, add polyethylene glycol (PEG) (active carbon and polyethylene glycol mass ratio are 1:4), soaks 10h, and temperature is controlled at 50 ℃, then drains 120 ℃ of baking 4h in baking oven.
2, take calcium chloride 32.5kg(granularity less than 350 μ m), 5A type molecular sieve 32.5kg puts into motionless mixer and mixes, and utilizes the dry 1h of gravity, obtains compound adsorbent.
3, with the composite drying agent that obtains, compound adsorbent is mixed to get the biogas drier according to the ratio of 1:1.
Embodiment 2
1, commercial active carbon 70kg toasts 5h at 115 ℃ of temperature, after cooling to room temperature, add polyethylene glycol (PEG) (active carbon and polyethylene glycol mass ratio are 1:5), soaks 11h, and temperature is controlled at 48 ℃, then drains 120 ℃ of baking 4.5h in baking oven.
2, take calcium chloride 35kg(granularity less than 350 μ m), 5A type molecular sieve 35kg puts into motionless mixer and mixes, and utilizes the dry 1.5h of gravity, obtains compound adsorbent.
3, with the composite drying agent that obtains, compound adsorbent is mixed to get the biogas drier according to the ratio of 1:1.
Embodiment 3
1, commercial active carbon 80kg toasts 5h at 120 ℃ of temperature, after cooling to room temperature, add polyethylene glycol (PEG) (active carbon and polyethylene glycol mass ratio are 1:6), soaks 12h, and temperature is controlled at 45 ℃, then drains 110 ℃ of baking 5h in baking oven.
2, take calcium chloride 40kg(granularity less than 350 μ m), 5A type molecular sieve 40kg puts into motionless mixer and mixes, and utilizes the dry 2h of gravity, obtains compound adsorbent.
3, with the composite drying agent that obtains, compound adsorbent is mixed to get the biogas drier according to the ratio of 1:1.Embodiment 1 obtains the desiccant product technical indicator:
| Index | Standard | Experimental data |
| Granularity (mm) | 1.6-5 | 2.5 |
| Static Water absorption (25 ℃, RH50%) (%) | ≥21 | 25 |
| Bulk density (g/ml) | ≥0.65 | 0.68 |
| Compression strength (N) | ＞28 | 36 |
| Absorption hexane amount (mg/g) | ≥120 | 127 |
Claims (5)
1. a biogas that is applicable to low enthalpy energy regeneration dehydrates agent, it is characterized in that step of preparation process is as follows:
⑴ after dry 4-6h under 110-120 ℃, cooling is room temperature naturally with active carbon; Soak 10-12h in polyglycol solution, temperature is controlled at 45-50 ℃ again;
⑵ will be after polyethylene glycol soaked active carbon cool place drains, then under 110-120 ℃ dry 4-6h, get standby composite drying agent;
⑶ 1:2 in mass ratio takes that calcium chloride mixes with 5A type molecular sieve, drying, gets standby compound adsorbent;
⑷ dehydrate agent with standby composite drying agent and standby compound adsorbent by being mixed to get biogas according to mass ratio 1:1.
2. the biogas that is applicable to low enthalpy energy regeneration as claimed in claim 1 dehydrates agent, it is characterized in that the calcium chloride granularity requirements is less than 350 μ m.
3. the biogas that is applicable to low enthalpy energy regeneration as claimed in claim 1 dehydrates agent, it is characterized in that calcium chloride and molecular sieve utilize gravity or the pneumatic mode drying that drains.
4. the biogas that is applicable to low enthalpy energy regeneration as claimed in claim 1 dehydrates agent, it is characterized in that standby composite drying agent and standby compound adsorbent utilize gravity or the pneumatic mode that drains to mix.
5. the biogas that is applicable to low enthalpy energy regeneration as claimed in claim 1 dehydrates agent, and the biogas that it is characterized in that gained dehydrates the agent technical standard and meets 5A molecular sieve desiccant technical indicator.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310072719.1A CN103111163B (en) | 2013-03-06 | 2013-03-06 | A kind of biogas being applicable to the regeneration of low enthalpy energy dehydrates agent |
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| CN201310072719.1A CN103111163B (en) | 2013-03-06 | 2013-03-06 | A kind of biogas being applicable to the regeneration of low enthalpy energy dehydrates agent |
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| CN103111163A true CN103111163A (en) | 2013-05-22 |
| CN103111163B CN103111163B (en) | 2015-08-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110280211A (en) * | 2019-06-25 | 2019-09-27 | 北京宇极科技发展有限公司 | A kind of desiccant of perfluor isobutyronitrile, preparation method and applications |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008115079A1 (en) * | 2007-03-20 | 2008-09-25 | Flotech Limited | Biogas upgrading |
| WO2011110322A1 (en) * | 2010-03-12 | 2011-09-15 | Dge Dr.-Ing. Günther Engineering Gmbh | Method for the absorptive drying of purified biogas and for regenerating laden adsorbents |
| CN102559316A (en) * | 2011-12-31 | 2012-07-11 | 浙江工业大学 | Methane purifying method and equipment thereof |
| CN102585953A (en) * | 2012-03-09 | 2012-07-18 | 广西大学 | Efficient variable-frequency and variable-pressure adsorptive separation and purification method for methane and carbon dioxide |
-
2013
- 2013-03-06 CN CN201310072719.1A patent/CN103111163B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008115079A1 (en) * | 2007-03-20 | 2008-09-25 | Flotech Limited | Biogas upgrading |
| WO2011110322A1 (en) * | 2010-03-12 | 2011-09-15 | Dge Dr.-Ing. Günther Engineering Gmbh | Method for the absorptive drying of purified biogas and for regenerating laden adsorbents |
| CN102559316A (en) * | 2011-12-31 | 2012-07-11 | 浙江工业大学 | Methane purifying method and equipment thereof |
| CN102585953A (en) * | 2012-03-09 | 2012-07-18 | 广西大学 | Efficient variable-frequency and variable-pressure adsorptive separation and purification method for methane and carbon dioxide |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110280211A (en) * | 2019-06-25 | 2019-09-27 | 北京宇极科技发展有限公司 | A kind of desiccant of perfluor isobutyronitrile, preparation method and applications |
| CN110280211B (en) * | 2019-06-25 | 2022-04-08 | 泉州宇极新材料科技有限公司 | Drying agent of perfluoroisobutyronitrile, preparation method and application thereof |
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| Publication number | Publication date |
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| CN103111163B (en) | 2015-08-19 |
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Granted publication date: 20150819 |