CN103111163B - A kind of biogas being applicable to the regeneration of low enthalpy energy dehydrates agent - Google Patents
A kind of biogas being applicable to the regeneration of low enthalpy energy dehydrates agent Download PDFInfo
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- CN103111163B CN103111163B CN201310072719.1A CN201310072719A CN103111163B CN 103111163 B CN103111163 B CN 103111163B CN 201310072719 A CN201310072719 A CN 201310072719A CN 103111163 B CN103111163 B CN 103111163B
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- agent
- biogas
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- dehydrates
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- 230000008929 regeneration Effects 0.000 title claims abstract description 29
- 238000011069 regeneration method Methods 0.000 title claims abstract description 29
- 239000002274 desiccant Substances 0.000 claims abstract description 26
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 25
- 239000003463 adsorbent Substances 0.000 claims abstract description 17
- 150000001875 compounds Chemical class 0.000 claims abstract description 16
- 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
- 239000002131 composite material Substances 0.000 claims abstract description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 14
- 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
- 238000001035 drying Methods 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 4
- 238000002360 preparation method Methods 0.000 claims abstract description 4
- 229920000151 polyglycol Polymers 0.000 claims abstract description 3
- 239000010695 polyglycol Substances 0.000 claims abstract description 3
- 239000002202 Polyethylene glycol Substances 0.000 claims description 14
- 229920001223 polyethylene glycol Polymers 0.000 claims description 14
- 230000005484 gravity Effects 0.000 claims description 9
- 239000012530 fluid Substances 0.000 claims description 2
- 238000002791 soaking Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 10
- 238000007791 dehumidification Methods 0.000 abstract description 5
- 238000003795 desorption Methods 0.000 abstract description 4
- 238000001179 sorption measurement Methods 0.000 abstract description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 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
- 230000018044 dehydration Effects 0.000 description 4
- 238000006297 dehydration reaction Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000002156 mixing Methods 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
- 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
- 230000001172 regenerating effect Effects 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
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Abstract
The biogas being applicable to the regeneration of low enthalpy energy dehydrates an agent, and step of preparation process for be down to room temperature by active carbon at 120 DEG C after drying; Soak in polyglycol solution again, dry at 120 DEG C again after cool place drains, obtain composite drying agent for subsequent use; Take in mass ratio calcium chloride mix with molecular sieve, dry, obtain compound adsorbent for subsequent use; In mass ratio composite drying agent for subsequent use and compound adsorbent for subsequent use are dehydrated agent by being mixed to get biogas.Biogas prepared by the inventive method dehydrates agent, and the power consumption of its desorption and regeneration is low, and the time is short, and drier is longer for service life, and use cost is low, and the volume of desiccant dehumidification equipment is little.The drier performance indications that this method obtains reach the technical indicator of 5A molecular sieve desiccant adsorption moisture, and regeneration times 10-30 time.
Description
Technical field
The present invention relates to a kind of biogas being applicable to the regeneration of low enthalpy energy and dehydrate agent.
Background technology:
The main component of biogas is methane, carbon dioxide, hydrogen sulfide, moisture, on a small quantity other gas componants.Biogas is regenerative resource, and it is obtained through anaerobic fermentation by organic matter.Along with updating of the production of biogas and process technology is perfect, its huge economic benefit and social benefit progressively show.If biogas is carried out fully utilizing and developing as a kind of energy products, just must accomplish scale production, will carry out purifying, compress, be separated, canned so that 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, dehydration (dehumidifying) the dry technology comparative maturity of gas, the method that gas humidity (represent in gas moisture content number) controls can be divided into mechanicalness and the large class of non-mechanical two.In mechanicalness humidity control method, the compression of tradition or the weak point of refrigeration are 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 consumption: membrane separation technique is just becoming the hot topic of dehumidifying research.The control method of on-mechanical humidity is the object utilizing the character of humidity adjusting material to reach control wet, and it comprises applying solid drier, liquid absorbent, compound-dehumidifying agent, based Dehumidification Membranes, energy humidity control material etc.
In marsh gas purifying dewatering process, usually utilize traditional solid drier to carry out dehumidifying dehydration, dry adsorbent has lithia, silica gel, molecular sieve, aluminium oxide, active carbon and composite drying agent etc.Wherein, lithia water absorption is large, but during water suction, thermal discharge is large, affects refrigerating capacity, is corrosive simultaneously; Molecular sieve dehydration ability is low, and alumina adsorption ability is only 50% of silica gel, and regeneration temperature high (usual 250-350 ° C), 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 first time regeneration, drying effect and original finished product are very nearly the same, and second time regeneration effect reduces to 90%, after regenerating through 10-30 time, drying effect reduces to original 80%, 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 that traditional drier exists is that desorption and regeneration energy consumption is high, the time is longer, how reduces use cost, reduce desorption energy consumption, extend drier service life, reduce the bottleneck that the volume of desiccant dehumidification equipment has become desiccant dehumidification technology.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of biogas being applicable to the regeneration of low enthalpy energy and dehydrates agent.
The present invention solves the problems of the technologies described above with following technical scheme:
The biogas being applicable to the regeneration of low enthalpy energy dehydrates an agent, it is characterized in that the processing step of preparation method is as follows:
By active carbon at 110-120 DEG C after dry 4-6h, Temperature fall is room temperature; In polyglycol solution, soak 10-12h again, temperature controls at 45-50 DEG C;
(2) after the active carbon cool place of soaking through polyethylene glycol being drained, then at 110-120 DEG C dry 4-6h, obtain composite drying agent for subsequent use;
In mass ratio 1:2 take calcium chloride mix with 5A type molecular sieve, dry, obtain compound adsorbent for subsequent use;
(4) according to mass ratio 1:1, composite drying agent for subsequent use and compound adsorbent for subsequent use are dehydrated agent by being mixed to get biogas.
Calcium chloride granularity requirements is less than 350 μm.
Calcium chloride and molecular sieve utilize gravity or pneumaticly drain mode drying.
Composite drying agent for subsequent use and compound adsorbent for subsequent use utilize gravity or the pneumatic mode that drains to mix.
The biogas of gained dehydrates agent technical standard and meets 5A molecular sieve desiccant technical indicator.
Biogas prepared by the inventive method dehydrates agent, and the power consumption of its desorption and regeneration is low, and the time is short, and drier is longer for service life, and use cost is low, and the volume of desiccant dehumidification equipment is little.The drier performance indications that this method obtains reach 5A molecular sieve desiccant technical indicator, and regeneration times is generally at 10-30 time.
Detailed description of the invention
The regeneration of agent is dehydrated in order to realize biogas, current major part adopts the energy that can produce high temperature, such as coal, electricity etc., these energy that can produce high temperature are used to dehydrate the thermal source of agent regeneration as biogas, not only at substantial resource, and too high regeneration temperature can destroy the version of drier inside, biogas drier was lost efficacy, therefore make drier cannot bear more regeneration.The application's is carry out regenerated methane dehydrate agent based on natural low enthalpy energy will be utilized to substitute the energy that can produce high temperature, makes it not only to make full use of the energy, and can accept more regeneration, extend its service life.
Low enthalpy energy means the middle low temperature heat transport fluid of less than 150 DEG C, producible temperature is no more than 150 DEG C, so this energy can not meet the requirement that conventional biogas dehydrates agent regeneration, a kind of biogas being applicable to the regeneration of low enthalpy energy that therefore applicant works out with prepared by the technical scheme of the application dehydrates agent.
The biogas being applicable to the regeneration of low enthalpy energy 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 DEG C of temperature, in baking oven, be naturally reduced to room temperature; Then add in enough polyethylene glycol (PEG) solution and soak 10-12h, temperature controls at 45-50 DEG C; After the active carbon cool place that polyethylene glycol soaked drains, drier 4-6h at putting into baking oven 110-120 DEG C, obtain composite drying agent for subsequent use;
Take according to mass ratio 1:2 calcium chloride that granularity is less than 350 μm (adopt colloid mill wear into) to put into motionless mixer with 5A type molecular sieve and mix, utilize gravity or pneumaticly drain mode drying 1-2h, obtaining compound adsorbent for subsequent use;
According to mass ratio 1:1, composite drying agent for subsequent use and compound adsorbent for subsequent use are dehydrated agent by gravity or the pneumatic biogas that is mixed to get.The biogas drier technical standard obtained meets 5A molecular sieve desiccant technical indicator.
The biogas drier obtained, before inserting on drier column plate, dewaters to biogas after first should drying 2-3h at 60-70 DEG C again.
Embodiment 1
1, commercial active carbon 65kg, toasts 4h at 120 DEG C of temperature, after cooling to room temperature, adds polyethylene glycol (PEG) (active carbon and polyethylene glycol mass ratio are 1:4), and soak 10h, temperature controls, at 50 DEG C, then to drain, 120 DEG C of baking 4h in baking oven.
2, take calcium chloride 32.5kg(granularity and be less than 350 μm), 5A type molecular sieve 32.5kg, puts into motionless mixer mixing, utilizes the dry 1h of gravity, obtains compound adsorbent.
3, the composite drying agent will obtained, compound adsorbent is mixed to get biogas drier according to the ratio of 1:1.
Embodiment 2
1, commercial active carbon 70kg, toasts 5h at 115 DEG C of temperature, after cooling to room temperature, adds polyethylene glycol (PEG) (active carbon and polyethylene glycol mass ratio are 1:5), and soak 11h, temperature controls, at 48 DEG C, then to drain, 120 DEG C of baking 4.5h in baking oven.
2, take calcium chloride 35kg(granularity and be less than 350 μm), 5A type molecular sieve 35kg, puts into motionless mixer mixing, utilizes the dry 1.5h of gravity, obtains compound adsorbent.
3, the composite drying agent will obtained, compound adsorbent is mixed to get biogas drier according to the ratio of 1:1.
Embodiment 3
1, commercial active carbon 80kg, toasts 5h at 120 DEG C of temperature, after cooling to room temperature, adds polyethylene glycol (PEG) (active carbon and polyethylene glycol mass ratio are 1:6), and soak 12h, temperature controls, at 45 DEG C, then to drain, 110 DEG C of baking 5h in baking oven.
2, take calcium chloride 40kg(granularity and be less than 350 μm), 5A type molecular sieve 40kg, puts into motionless mixer mixing, utilizes the dry 2h of gravity, obtains compound adsorbent.
3, the composite drying agent will obtained, compound adsorbent is mixed to get biogas drier according to the ratio of 1:1.Embodiment 1 obtains desiccant product technical indicator:
| Index | Standard | Experimental data |
| Granularity (mm) | 1.6-5 | 2.5 |
| Static Water absorption (25 DEG C, 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. the biogas being applicable to the regeneration of low enthalpy energy dehydrates an agent, it is characterized in that step of preparation process is as follows:
By active carbon at 110-120 DEG C after dry 4-6h, Temperature fall is room temperature; In polyglycol solution, soak 10-12h again, temperature controls at 45-50 DEG C;
(2) after the active carbon cool place of soaking through polyethylene glycol being drained, then at 110-120 DEG C dry 4-6h, obtain composite drying agent for subsequent use;
In mass ratio 1:2 take calcium chloride mix with 5A type molecular sieve, dry, obtain compound adsorbent for subsequent use;
(4) according to mass ratio 1:1, composite drying agent for subsequent use and compound adsorbent for subsequent use are dehydrated agent by being mixed to get biogas.
Low enthalpy energy means the middle low temperature heat transport fluid of less than 150 DEG C, and producible temperature is no more than 150 DEG C.
2. the biogas being applicable to the regeneration of low enthalpy energy as claimed in claim 1 dehydrates agent, it is characterized in that calcium chloride granularity requirements is less than 350 μm.
3. the biogas being applicable to the regeneration of low enthalpy energy as claimed in claim 1 dehydrates agent, it is characterized in that calcium chloride and molecular sieve utilize gravity or pneumaticly drain mode drying.
4. the biogas being applicable to the regeneration of low enthalpy energy as claimed in claim 1 dehydrates agent, it is characterized in that composite drying agent for subsequent use and compound adsorbent for subsequent use utilize gravity or the pneumatic mode that drains to mix.
5. the biogas being applicable to the regeneration of low enthalpy energy as claimed in claim 1 dehydrates agent, it is characterized in that the biogas of gained dehydrates agent technical standard and meets 5A molecular sieve desiccant technical indicator.
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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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| CN103111163B true CN103111163B (en) | 2015-08-19 |
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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 |
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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 |
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