CN1613551A - Calcium-expanding black lead mixed adsorbent - Google Patents
Calcium-expanding black lead mixed adsorbent Download PDFInfo
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- CN1613551A CN1613551A CN 200410066781 CN200410066781A CN1613551A CN 1613551 A CN1613551 A CN 1613551A CN 200410066781 CN200410066781 CN 200410066781 CN 200410066781 A CN200410066781 A CN 200410066781A CN 1613551 A CN1613551 A CN 1613551A
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Abstract
A mixed adsorbent for the absorption bed of air conditioner is prepared from calcium chloride and expanded graphite in the weight ratio of (60-80%):(20-40%) for the bulk one or (55.1-67.7%):(17.2-32.7%) for the solid one. Its advantages are high gas osmosis, high heat conductivity and high refrigerating efficiency.
Description
Technical field
What the present invention relates to is adsorbent in a kind of absorption refrigeration/heat pump, specifically is a kind of calcium-expanding black lead mixed adsorbent.Be used for the absorption refrigeration field.
Background technology
As a kind of green refrigeration technology that drives with the renewable sources of energy or low grade residual heat, absorption type refrigerating/heat pump techniques more and more obtains people's attention.Applied adsorbent mainly comprises physical absorbent, chemosorbent and physical-chemical mixed adsorbent in absorption type refrigerating/heat pump at present.Chemosorbent is with respect to physical absorbent, have absorption, desorption quantity big, freeze and heat advantages such as power is big, also there are simultaneously shortcomings such as conduct heat poor, gas permeability difference and swelling be serious, in order to solve these shortcomings of chemosorbent, the research of mixed adsorbent has at present become a focus.
Find through open source literature retrieval prior art, Vasiliev is at International Ab-sor-ption Heat Pump Conference (Montreal, Canada, " Multi-effect complex compound/ammonia sorption machines " (" the international sorption type heat pump meeting paper " delivered 1996:3-8), " multiple-effect complex compound-ammonia absorption model machine ") mixed adsorbent of NACF and calcium chloride is studied, the ratio of calcium chloride and NACF is 1: 1 in the mixed adsorbent of being prepared, application result shows in small test device, and the SCP of this adsorbent is about 330W/kg.The expansion and the caking phenomenon that can effectively solve chemosorbent that mix of NACF and chemosorbent, but NACF in concrete the application and the thermal contact resistance between the adsorbent bed bigger, be unfavorable for the heat transfer of adsorbent bed.
Summary of the invention
The objective of the invention is to overcome deficiency of the prior art, a kind of calcium-expanding black lead mixed adsorbent is provided, make its shortcoming, improved the heat transfer and the mass-transfer performance of chemosorbent at simple chemosorbent.
The present invention is achieved by the following technical solutions, the present invention is divided in bulk and solidifies two kinds of mixed adsorbents, each component of mixed adsorbent wherein in bulk and percentage by weight thereof are respectively: calcium chloride 60%～80%, expanded graphite 20%～40%, the percentage by weight that solidifies each component of mixed adsorbent is respectively: calcium chloride 55.1%～67.7%, expanded graphite 17.2%～32.7%, water 12.2%～15.1%.
Below the present invention is further illustrated, at absorption air-conditioning and absorption type ice making operating mode, prepare in bulk and two kinds of mixed adsorbents of curing, particular content is as follows:
For the absorption air conditioning condition, calcium-expanding black lead mixed adsorbent of the present invention has following two kinds of prescriptions, selects one of them during use:
(1) mixed adsorbent in bulk, the percentage by weight of each component is: calcium chloride 70%～80%, expanded graphite 20%～30%;
(2) solidify mixed adsorbent, the percentage by weight of each component is: calcium chloride 66.2%～67.7%, expanded graphite 17.2%～24%, water 9.8%～15.1%.
For absorption type ice making operating mode, calcium-expanding black lead mixed adsorbent of the present invention has following two kinds of prescriptions, selects one of them during use:
(1) mixed adsorbent in bulk, the percentage by weight of each component is: calcium chloride 60%～70%, expanded graphite 30%～40%;
(2) solidify mixed adsorbent, the percentage by weight of each component is: calcium chloride 55.1%～62.3%, expanded graphite 23.8%～32.7%, water 12.2%～13.9%.
In the mixed adsorbent in bulk, the hybrid mode of expanded graphite in bulk and calcium chloride is for directly mixing or flooding mixing, be that the two directly mixes the back oven dry, be applied in the adsorbent bed again, perhaps earlier calcium chloride is dissolved in the water with quality such as calcium chloride, then expanded graphite be impregnated in the aqueous solution of calcium chloride, be applied in the adsorbent bed after will flooding adsorbent oven dry at last.Solidify mixed adsorbent, earlier calcium chloride and water are stirred, add expanded graphite again, adopt mold cured to form after stirring.
In bulk with solidify adsorbent different according to its form, can be applied to the adsorbent bed of different occasions.When the packing space of adsorbent hour, when for example adopting the plate-fin adsorbent bed, because the filling of solidifying mixed adsorbent difficulty comparatively generally adopts mixed adsorbent in bulk.For the big adsorbent bed of the packing space of adsorbent, for example the shell-tube type adsorbent bed can adopt the curing mixed adsorbent.
Mixed adsorbent is a matrix owing to having adopted expanded graphite among the present invention, the gas permeability and the volume loading of adsorbent have been improved greatly, simultaneously because the packed density increasing, improved the heat transfer property of adsorbent greatly, under the condition of equal volume adsorbent bed, air conditioning condition volume refrigerating capacity can improve about 50%, and the ice making operating mode can improve refrigerating capacity about 58%.When die pressure was 10～15Mpa, the more Powdered calcium chloride of thermal conductivity factor that solidifies mixed adsorbent improved more than 30 times, the highlyest can reach 9.77W/mK.
The specific embodiment
Content in conjunction with material of the present invention provides specific embodiment:
For the absorption air conditioning condition, the embodiment of mixed adsorbent in bulk is as follows:
(1) calcium chloride 70%, expanded graphite 30%, and the two directly mixes the back oven dry.For simple calcium chloride, expand and caking phenomenon owing in adsorption process, exist, so must leave necessary expansion space.Through experimental verification, at air conditioning condition, the maximum volume loading of calcium chloride has only 41.6%.Adopt above-mentioned mixing and absorption agent prescription, because expanded graphite can well improve the mass transfer of adsorbent, the volume loading of calcium chloride can improve 29%, and corresponding volume refrigerating capacity also will improve 29%.
(2) calcium chloride 8%0, and expanded graphite 20% impregnated in expanded graphite in the aqueous solution of calcium chloride, will flood the adsorbent oven dry at last.Adopt above-mentioned mixing and absorption agent prescription, the volume loading of calcium chloride can improve 35%, and corresponding volume refrigerating capacity also will improve 35%.
For the absorption air conditioning condition, the embodiment that solidifies mixed adsorbent is as follows:
(3) calcium chloride 66.2%, expanded graphite 24%, water 9.8%.Earlier calcium chloride and water are stirred, add expanded graphite again.Adopt above-mentioned mixing and absorption agent prescription, the volume loading of calcium chloride can improve 50%, and corresponding volume refrigerating capacity also will improve 50%.When die pressure was 10～15Mpa, the more Powdered calcium chloride of thermal conductivity factor that solidifies mixed adsorbent improved more than 30 times, the highlyest can reach 9.4W/mK.
(4) calcium chloride 67.7%, expanded graphite 17.2%, water 15.1%.Earlier calcium chloride and water are stirred, add expanded graphite again.Adopt above-mentioned mixing and absorption agent prescription, the volume loading of calcium chloride can improve 43%, and corresponding volume refrigerating capacity also will improve 43%.When die pressure was 10～15Mpa, the more Powdered calcium chloride of thermal conductivity factor that solidifies mixed adsorbent improved more than 30 times, the highlyest can reach 9.0W/mK.
For absorption type ice making operating mode, the embodiment of mixed adsorbent in bulk is as follows:
(1) calcium chloride 60%, expanded graphite 40%, and the two directly mixes the back oven dry.For simple calcium chloride, expand and caking phenomenon owing in adsorption process, exist, so must leave necessary expansion space.Through experimental verification, in the ice making operating mode, because system pressure is lower, the maximum volume loading of calcium chloride is less than the volume loading of air conditioning condition, has only 33.3%.Adopt above-mentioned mixing and absorption agent prescription, because expanded graphite can well improve the mass transfer of adsorbent, the volume loading of calcium chloride can improve 29%, and corresponding volume refrigerating capacity also will improve 29%.
(2) calcium chloride 70%, and expanded graphite 30% impregnated in expanded graphite in the aqueous solution of calcium chloride, will flood the adsorbent oven dry at last.Adopt above-mentioned mixing and absorption agent prescription, the volume loading of calcium chloride can improve 34%, and corresponding volume refrigerating capacity also will improve 34%.
For absorption type ice making operating mode, the embodiment that solidifies mixed adsorbent is as follows:
(3) calcium chloride 55.1%, expanded graphite 32.7%, water 12.2%.Earlier calcium chloride and water are stirred, add expanded graphite again.Adopt above-mentioned mixing and absorption agent prescription, the volume loading of calcium chloride can improve 58%, and corresponding volume refrigerating capacity also will improve 58%.When die pressure was 10～15Mpa, the more Powdered calcium chloride of thermal conductivity factor that solidifies mixed adsorbent improved more than 30 times, the highlyest can reach 9.77W/mK.
(4) calcium chloride 62.3%, expanded graphite 23.8%, water 13.9%.Earlier calcium chloride and water are stirred, add expanded graphite again.Adopt above-mentioned mixing and absorption agent prescription, the volume loading of calcium chloride can improve 53%, and corresponding volume refrigerating capacity also will improve 53%.When die pressure was 10～15Mpa, the more Powdered calcium chloride of thermal conductivity factor that solidifies mixed adsorbent improved more than 30 times, the highlyest can reach 9.3W/mK.
Claims (5)
1, a kind of calcium-expanding black lead mixed adsorbent, it is characterized in that, adsorbent is divided in bulk and solidifies two kinds of mixed adsorbents, and each component of mixed adsorbent wherein in bulk and percentage by weight thereof are respectively: calcium chloride 60%～80%, expanded graphite 20%～40%; The percentage by weight that solidifies each component of mixed adsorbent is respectively: calcium chloride 55.1%～67.7%, expanded graphite 17.2%～32.7%, water 12.2%～15.1%.
2, calcium-expanding black lead mixed adsorbent according to claim 1 is characterized in that, for the absorption air conditioning condition, following two kinds of prescriptions is arranged, and selects one of them during use:
(1) mixed adsorbent in bulk, the percentage by weight of each component is: calcium chloride 70%～80%, expanded graphite 20%～30%;
(2) solidify mixed adsorbent, the percentage by weight of each component is: calcium chloride 66.2%～67.7%, expanded graphite 17.2%～24%, water 9.8%～15.1%.
3, calcium-expanding black lead mixed adsorbent according to claim 1 is characterized in that, for absorption type ice making operating mode, following two kinds of prescriptions is arranged, and selects one of them during use:
(1) mixed adsorbent in bulk, the percentage by weight of each component is: calcium chloride 60%～70%, expanded graphite 30%～40%;
(2) solidify mixed adsorbent, the percentage by weight of each component is: calcium chloride 55.1%～62.3%, expanded graphite 23.8%～32.7%, water 12.2%～13.9%.
4, according to claim 1 or 2 or 3 described calcium-expanding black lead mixed adsorbents, it is characterized in that, in the mixed adsorbent in bulk, the hybrid mode of expanded graphite in bulk and calcium chloride is for directly mixing or flooding mixing, be that the two directly mixes the back oven dry, be applied to again in the adsorbent bed, perhaps earlier calcium chloride is dissolved in the water with quality such as calcium chloride, then expanded graphite be impregnated in the aqueous solution of calcium chloride, be applied in the adsorbent bed after will flooding adsorbent oven dry at last.
5, according to claim 1 or 2 or 3 described calcium-expanding black lead mixed adsorbents, it is characterized in that, solidify mixed adsorbent, earlier calcium chloride and water are stirred, add cement and expanded graphite again, adopt mold cured to form after stirring.
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| CN101337175B (en) * | 2008-08-07 | 2010-06-09 | 上海交通大学 | Lanthanum nickel alloy-expanded graphite solid compound adsorbent and preparation method thereof |
| CN101961644A (en) * | 2010-09-27 | 2011-02-02 | 山东大学 | Chloride-carbonaceous skeleton composite adsorbent and preparation method thereof |
| CN102728315A (en) * | 2012-07-11 | 2012-10-17 | 中国第一汽车股份有限公司 | Preparation method of activated carbon containing porous active mixture for active ammonia storage |
| CN102728319A (en) * | 2012-07-11 | 2012-10-17 | 中国第一汽车股份有限公司 | Preparation method of expanded graphite-containing porous active ammonia-storing active mixture |
| CN102794155A (en) * | 2012-07-11 | 2012-11-28 | 中国第一汽车股份有限公司 | Porous solid test piece for storing ammonia and preparation method thereof |
| CN103191704A (en) * | 2013-04-18 | 2013-07-10 | 中国科学技术大学 | Composite adsorbent and preparation method thereof |
| CN103194055A (en) * | 2013-04-18 | 2013-07-10 | 中国科学技术大学 | Material for regulating humidity and preparation method and application thereof |
| CN105498690A (en) * | 2016-01-15 | 2016-04-20 | 广东工业大学 | Composite adsorption material and preparation method thereof |
| CN106268638A (en) * | 2016-08-22 | 2017-01-04 | 上海交通大学 | A kind of to expand sulfuration graphite salty compound adsorbent as substrate and preparation method thereof |
| CN109046242A (en) * | 2018-08-22 | 2018-12-21 | 华中科技大学 | A kind of compound adsorbent and application based on carbon nanotube |
| CN108144575B (en) * | 2018-01-12 | 2021-03-30 | 浙江理工大学 | Graphite sulfide, silica gel and lithium chloride curing composite dehumidifying agent and preparation method thereof |
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2004
- 2004-09-29 CN CN 200410066781 patent/CN1613551A/en active Pending
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101337175B (en) * | 2008-08-07 | 2010-06-09 | 上海交通大学 | Lanthanum nickel alloy-expanded graphite solid compound adsorbent and preparation method thereof |
| CN101961644B (en) * | 2010-09-27 | 2012-11-14 | 山东大学 | Chloride-carbonaceous skeleton composite adsorbent and preparation method thereof |
| CN101961644A (en) * | 2010-09-27 | 2011-02-02 | 山东大学 | Chloride-carbonaceous skeleton composite adsorbent and preparation method thereof |
| CN102728315B (en) * | 2012-07-11 | 2015-12-16 | 中国第一汽车股份有限公司 | A kind of porous active storage ammonia active mixture preparation containing active carbon |
| CN102794155B (en) * | 2012-07-11 | 2015-07-01 | 中国第一汽车股份有限公司 | Porous solid test piece for storing ammonia and preparation method thereof |
| CN102794155A (en) * | 2012-07-11 | 2012-11-28 | 中国第一汽车股份有限公司 | Porous solid test piece for storing ammonia and preparation method thereof |
| CN102728315A (en) * | 2012-07-11 | 2012-10-17 | 中国第一汽车股份有限公司 | Preparation method of activated carbon containing porous active mixture for active ammonia storage |
| CN102728319A (en) * | 2012-07-11 | 2012-10-17 | 中国第一汽车股份有限公司 | Preparation method of expanded graphite-containing porous active ammonia-storing active mixture |
| CN102728319B (en) * | 2012-07-11 | 2015-08-12 | 中国第一汽车股份有限公司 | A kind of porous active storage ammonia active mixture preparation containing expanded graphite |
| CN103194055A (en) * | 2013-04-18 | 2013-07-10 | 中国科学技术大学 | Material for regulating humidity and preparation method and application thereof |
| CN103194055B (en) * | 2013-04-18 | 2015-06-17 | 中国科学技术大学 | Material for regulating humidity and preparation method and application thereof |
| CN103191704B (en) * | 2013-04-18 | 2015-04-22 | 中国科学技术大学 | Composite adsorbent and preparation method thereof |
| CN103191704A (en) * | 2013-04-18 | 2013-07-10 | 中国科学技术大学 | Composite adsorbent and preparation method thereof |
| CN105498690A (en) * | 2016-01-15 | 2016-04-20 | 广东工业大学 | Composite adsorption material and preparation method thereof |
| CN106268638A (en) * | 2016-08-22 | 2017-01-04 | 上海交通大学 | A kind of to expand sulfuration graphite salty compound adsorbent as substrate and preparation method thereof |
| CN106268638B (en) * | 2016-08-22 | 2019-10-25 | 上海交通大学 | It is a kind of that graphite is vulcanized as salty compound adsorbent of matrix and preparation method thereof using expansion |
| CN108144575B (en) * | 2018-01-12 | 2021-03-30 | 浙江理工大学 | Graphite sulfide, silica gel and lithium chloride curing composite dehumidifying agent and preparation method thereof |
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