CN102489247A - New formula and preparation method of dry filtering core for refrigerating system - Google Patents
New formula and preparation method of dry filtering core for refrigerating system Download PDFInfo
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- CN102489247A CN102489247A CN2011104284719A CN201110428471A CN102489247A CN 102489247 A CN102489247 A CN 102489247A CN 2011104284719 A CN2011104284719 A CN 2011104284719A CN 201110428471 A CN201110428471 A CN 201110428471A CN 102489247 A CN102489247 A CN 102489247A
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Abstract
The invention relates to a new formula of a dry filtering core for a refrigerating system. The new formula comprises an inorganic component and an organic component, wherein the inorganic component is one or more of molecule sieves, activated aluminium oxide, silica gel and active carbon, and the organic component is an organic binder and is selected from one or more of amino formic ether resin, polypropylene gum and furan resin. A preparation method of the dry filtering core comprises the following steps of: mixing the inorganic component and the organic component at the mass ratio of (70-95):(5-30), carrying out compression forming, activating for 2-4 hours at the temperature of 100-300 DEG C, and after activation, preparing the dry filtering core. The new formula and preparation method provided by the invention are beneficial to realizing mechanical production of the dry filtering core, and the prepared dry filtering core adapts to novel refrigerant systems such as R410a, R407c and R32 and the like.
Description
Technical field
The present invention relates to a kind of new prescription and dry filter core preparation method of dry filter core for refrigerating system.
Background technology
Dry filter core is one of vitals of refrigeration system, is mainly used in to remove moisture contained in the refrigerant and the acid impurity that grades, to ensure the normal operation of whole system.
In the prior art, in preparing the method for dry filter core, inorganic phosphate binding agent commonly used forms component bondings such as drier component such as molecular sieve, aluminium oxide, silica gel.Adopt the dry filter core of above-mentioned inorganic glue preparation, when inorganic glue content was higher, the water absorbing capacity of dry filter core will reduce; When inorganic glue content was low, its compression strength was relatively poor.
U.S. Pat 5440898 discloses a kind of preparation technology of dry filter core of refrigeration system.Adopt the aluminophosphates binding agent that molecular sieve, the alumina particle bonding of certain content are formed,, also when moulding, added reinforced fibers etc. for improving the intensity of dry core.
U.S. Pat 6559096 discloses a kind of refrigeration system drier and preparation method thereof, and drier comprises following adsorbent: calcium chloride, lithium chloride, can also sneak into the porosity that can easily control pore size simultaneously, like active carbon.Do not contain molecular sieve in the drier that this patent proposes, and chloride can cause the corrosion of refrigeration pipe.
U.S. Pat 5518977 disclosed drier are mixed by crystallization of molecular sieves and activated alumina; With kaolin, tripoli is adhesive; But the described technology of this patent is how to make this drier attached to pipe surface, and is irrelevant with the composition of raw materials of making dry filter core.
The disclosed drier of world patent WO9912641A1 is formed and is comprised: but tripoli, aluminium oxide, active carbon, paper or type stationery hygroscopic material, particularly muriatic salt.These materials with moisture pick-up properties are evenly distributed in the porous infiltration carrier.The drier that this patent proposes is formed and is not also contained molecular sieve, and water absorbing capacity is poor.
Japan Patent JP08121909 has proposed the graininess A type molecular sieve is bondd with inorganic salts, and puts into the block model extrusion modling.But this patent still has the defectives such as poor water resistance that inorganic binder brings.
Chinese patent CN1467021 is the manufacturing approach of the domestic dry filter core that proposes the earliest.This method is that the sieve particle after the modification, aluminium oxide etc. are bondd with Phos aluminate binding agent, behind 200～700 ℃ of calcination activations, makes after the moulding.Chinese patent CN1616146 has proposed the manufacturing approach that a kind of pure molecular sieve drying is crossed filter core, also is to adopt moulding activated the making of inorganic phosphate binding agent.
Chinese patent CN1663675 and CN1663676 propose a kind of new prescription and manufacturing process of dry filter core for refrigerating system.This prescription is made up of powder raw material and binding agent; Powder raw material comprises that optional several kinds mix in molecular sieve and alumina powder, active carbon or the active carbon powder; Binding agent comprises one or more in sodium metasilicate, potassium silicate or the silica aqueous solution, and powder raw material and binding agent directly are mixed and made into particle.Directly use the phosphate binders molding bonded behind the particle drying, 200～600 ℃ of activation make dry filter core, this work simplification production procedure, but still adopt the inorganic glue molding bonded.
Chinese patent CN1981910 provides a kind of preparation method who is used for the dry filter core of refrigeration system, and it may further comprise the steps: the sieve particle material that at first makes the alkali metal hydroxide modification; Again butt molecular sieve pellet 40～90 weight portions, activated alumina 0～50 weight portion, active carbon 0～10 weight portion are mixed into base-material, adding the extrusion forming of binding agent 15～30 weight portions bonding was the filter core semi-finished product; To cross the filter core semi-finished product at last 300～600 ℃ of heat-activated, obtain the dry filter core finished product.Used molding adhesive remains phosphate binders.
In recent years, along with the progress of Refrigeration Technique, renewal of alternative refrigerant was regenerated; Requirement to dry filter core is also increasingly high; Be mainly reflected in three aspects: (1) water absorbing capacity is high, and (2) compression strength (or resistance to water) is good, and (3) have good compatibility with cold-producing medium.Therefore, research and develop novel organic binder bond technology, the problem that can solve present inorganic dry filter core well and faced.
United States Patent (USP) CN3545622 discloses a kind of method that adopts organic binder bond to prepare dry filter core; This patent be with a large amount of silica gel (75～95wt%) with a small amount of 4A sieve particle (5～25wt%) make drier; Adopt liquid epoxy resin to make binding agent, activation under the temperature of 300～450 ℉.The drier of this patent is main with silica gel, and water absorbing properties is relatively poor, and can not be compatible well with novel refrigerant such as R410a, R407c etc.
Summary of the invention the purpose of this invention is to provide a kind of new prescription of the dry filter core for refrigerating system that adopts organic binder bond and the preparation method of dry filter core.
The present invention adopts following manner to realize.
The new prescription of a kind of dry filter core for refrigerating system of the present invention; It is characterized in that; This prescription comprises inorganic component and organic component, and described inorganic component is selected from any one or a few in molecular sieve, activated alumina, silica gel, the active carbon, and described organic component is an organic binder bond.
In the new prescription of dry filter core of the present invention, described organic binder bond is selected from any one or a few in amido formic acid fat resin, polypropylene glue and the furane resins.
In the new prescription of dry filter core of the present invention, described inorganic component comprises molecular sieve 30～100 weight portions in weight portion, activated alumina 0～60 weight portion, and silica gel 0～20 weight portion, active carbon 0～10 weight portion, component is all calculated with butt in the prescription.
In the new prescription of dry filter core of the present invention, in the described inorganic component, preferred 60～100 weight portions of molecular sieve; Preferred 30～60 weight portions of activated alumina; Preferred 5～15 weight portions of silica gel, preferred 3～8 weight portions of active carbon, component is all calculated with butt in the prescription.
In the new prescription of dry filter core of the present invention, described organic binder bond comprises amido formic acid fat resin 30～90 weight portions in weight portion, polypropylene glue 0～30 weight portion, and furane resins 0～70 weight portion, component is all calculated with butt in the prescription.
In the new prescription of dry filter core of the present invention, in weight percentage, the ratio of described inorganic component and organic component is 70～95 weight %:30～5 weight %.
In the new prescription of dry filter core of the present invention, described molecular sieve is spherical or irregular shaped molecular sieve.
The preparation method of dry filter core of the present invention; Comprise following preparation process: the inorganic component of the dry filter core of configuration amount is mixed; The organic binder bond that adds configuration amount then is with the inorganic component molding bonded; 100 ℃～300 ℃ following activation also dry 2～4 hours, the cooling final vacuum was packaged to be block dry filter core product.
The present invention compared with prior art has following advantage.
1, in the prior art, in preparing the method for dry filter core, inorganic binder commonly used is with drier component molding bonded.When inorganic glue content was higher, the water absorbing capacity of crossing filter core can reduce; When inorganic glue content was low, the compression strength of crossing filter core was relatively poor, and simultaneously, inorganic glue itself also exists the shortcoming of poor water resistance, particularly caused the quick efflorescence of product after the moulding of 3A molecular sieve component easily.
The organic binder bond that the present invention selects for use, organic binder bond be water content, easily-activated, the water absorbing capacity that do not influence the filter core product not, and intensity is high after the activation; The while organic binder bond has water-tolerant, the filter core excessively after the various inorganic component moulding all is difficult for taking place the advantage of efflorescence.
With replaceable 48 type filter cores is example, and table 1 is seen in the index of correlation contrast.
Table 1 inorganic binder and the organic binder bond product performance index table of comparisons.
| Index | Inorganic binder molding filter core | Organic binder bond molding filter core |
| Water absorbing capacity | Greater than 16.0% | Greater than 17.5% |
| The package water content | Less than 1.5% | Less than 1.0% |
| Intensity | Greater than 1000N | Greater than 1200N |
| With the cold-producing medium compatibility | Be applicable to R12, R22, R134a | Be applicable to: R12, R22, R134a, R410a, R407c |
2, product main application of the present invention is the cold-producing medium in the dry refrigeration system, and inorganic binder often adopts the phosphoric acid salt product, and the pH value is high, increases the refrigeration system acid number easily, increases the probability that refrigeration pipe is corroded.Itself does not contain metal cation the organic binder bond component, and is good with the cold-producing medium compatibility, can not produce the inhibition effect, increase systemic acidity.
3, the activation temperature of inorganic binder is 300～550 degree in the prior art, and the activation temperature of organic binder bond is low, than low 200～250 degree of inorganic bond forming temperature, reaches energy-saving and cost-reducing target.
4, the new prescription of dry filter core for refrigerating system of the present invention helps mechanization production for the binding agent that adopts is an organic binder bond.And existing patent generally adopts inorganic binder, because the glue activation is fast, is unfavorable for mechanization production, and production efficiency is low, and activation temperature is high after the inorganic glue moulding, and energy consumption is bigger.
5, existing patent adopts the dry filter core of organic epoxy glue binding agent manufacturing; Its drier is main with silica gel, and drying property is poor, and can is molecular sieve, aluminium oxide etc. by the inorganic component of organic binder bond moulding preferably; Wherein the adsorption capacity of key component molecular sieve, aluminium oxide big, the selection adsorption function arranged; Preferential adsorption moisture content, other materials such as absorption refrigeration agent have not improved and have crossed the drying property of filter core to cold-producing medium.
The specific embodiment
Further set forth the present invention through detailed description below, but embodiment not a limitation of the present invention to specific embodiment of the present invention.
Percentage composition described in following each embodiment all is a weight percentage.
Embodiment 1:
The molecular sieve of the inorganic component of dry filter core: 70kg, the activated alumina of 20kg, 5kg silica gel and 5kg active carbon mix with mixer; Add the organic binder bond (15kg amido formic acid fat resin, 12kg polypropylene glue, 3kg furane resins) that 30kg mixes; Activation furnace was put in compound compression molding after the spice machine mixes, 200 ℃ of following activation also dry 3 hours; Cross the filter core cooling, vacuum packaging obtains block dry filter core product.
Through measuring, the dry filter core product has following character.Static Water absorption: 17.5%, the package water content: 0.5%, intensity 1350N, product are applicable to the system's cleaning after refrigeration system compressor damages.
Embodiment 2:
The molecular sieve of the inorganic component of dry filter core: 90kg, 10kg activated alumina mix with mixer; Add organic binder bond (the 18kg amido formic acid fat resin that 30kg mixes; 12kg polypropylene glue); Activation furnace is put in compound compression molding after the spice machine mixes, at vacuum or N
2The filter core cooling is crossed in 250 ℃ of following activation and dry 2 hours in the atmosphere, and vacuum packaging obtains block dry filter core product.
Through measuring, the dry filter core product has following character.Static Water absorption: 17.8%, the package water content: 0.9%, intensity 1500N, product are applicable to the R410a of deacidification, the R407c refrigerant system.
Embodiment 3:
The molecular sieve of the inorganic component of dry filter core: 80kg, 20kg activated alumina mix with mixer; Add the organic binder bond (8kg amido formic acid fat resin, 7kg polypropylene glue) that 15kg mixes, compound compression molding after the spice machine mixes; Put into activation furnace; 250 ℃ of following activation also dry 3 hours, cross the filter core cooling, vacuum packaging obtains block dry filter core product.
Through measuring, the dry filter core product has following character.Static Water absorption: 18.2%, the package water content: 0.8%, intensity 1460N, product are applicable to the R134a that must deacidify, R22 refrigeration system.
Embodiment 4:
The molecular sieve of the inorganic component of dry filter core: 100kg; Add the organic binder bond (8kg amido formic acid fat resin, 7kg polypropylene glue) that 15kg mixes, compound compression molding after the spice machine mixes; Put into activation furnace; 250 ℃ of following activation also dry 3 hours, cross the filter core cooling, vacuum packaging obtains block dry filter core product.
Through measuring, the dry filter core product has following character.Static Water absorption: 17.8%, the package water content: 0.5%, intensity 1350N, product are applicable to the demanding R410a of dehumidifying, R407c refrigerant system.
Embodiment 5:
Except that the dry filter core inorganic component was the molecular sieve, 20kg activated alumina, 10kg silica gel of 70kg, other component was all identical with embodiment 1 with operation.
Through measuring, the dry filter core product has following character.Static Water absorption: 17.5%, package water content: 0.9%.Intensity 1600N, product are applicable to the R134a that must deacidify, R22 refrigeration system.
Embodiment 6:
The molecular sieve of the inorganic component of dry filter core: 60kg, 30kg activated alumina, 10kg silica gel add organic binder bond (15kg amido formic acid fat resin, 9kg polypropylene glue that 30kg mixes; The 6kg furane resins); Activation furnace was put in compound compression molding after the spice machine mixes, 150 ℃ of following activation also dry 4 hours; Cross the filter core cooling, vacuum packaging obtains block dry filter core product.
Through measuring, the dry filter core product has following character.Static Water absorption: 17.5%, the package water content: 0.8%, intensity 1960N, product are applicable to the R134a that must deacidify, R22 refrigeration system.
Embodiment 7:
Except that the dry filter core inorganic component was the molecular sieve, 10kg silica gel of 90kg, other component was all identical with embodiment 6 with operation.
Through measuring, the dry filter core product has following character.Static Water absorption: 17.7%, the package water content: 0.5%, intensity 1890N, product are applicable to the R134a that must deacidify, R22 refrigeration system.
Embodiment 8:
Removing the dry filter core inorganic component is molecular sieve, 10kg silica gel, the 10kg active carbon of 80kg; Add the organic binder bond (30kg amido formic acid fat resin, 10kg furane resins) that 40kg mixes, compound compression molding after the spice machine mixes; Put into activation furnace; 200 ℃ of following activation also dry 2 hours, cross the filter core cooling, vacuum packaging obtains block dry filter core product.
Through measuring, the dry filter core product has following character.Static Water absorption: 18.0%, package water content: 0.3%.Intensity 1950N, product is applicable to R12, R22, R134a need clean the refrigerant system of compressor.
Embodiment 9:
Removing the organic binder bond component is 30kg amido formic acid fat resin, and outside the 10kg polypropylene glue, other component is all identical with embodiment 8 with operation.
Through measuring, the dry filter core product has following character.Static Water absorption: 18.2%, the package water content: 0.4%, intensity 1900N, product is applicable to R12, R22, R134a need clean the refrigerant system of compressor.
Embodiment 10:
The molecular sieve of the inorganic component of dry filter core: 60kg, 30kg activated alumina, 10 kg active carbons mix with mixer; Add the organic binder bond (3kg amido formic acid fat resin, 2kg polypropylene glue) that 5kg mixes, compound compression molding after the spice machine mixes; Put into activation furnace; 150 ℃ of following activation also dry 2 hours, cross the filter core cooling, vacuum packaging obtains block dry filter core product.
Through measuring, the dry filter core product has following character.Static Water absorption: 19.2%, the package water content: 0.3%, intensity 1200N, product are applicable to the R134a of deacidification, the R22 refrigerant system.
Embodiment 11:
Remove activation temperature and be 300 and be outside one's consideration, other component with operate all identical with embodiment 10.
Through measuring, the dry filter core product has following character.Static Water absorption: 19.5%, the package water content: 0.2%, intensity 1230N, product are applicable to the R134a of deacidification, the R22 refrigerant system.
Embodiment 12:
The molecular sieve of the inorganic component of dry filter core: 70kg, 30kg activated alumina mix with mixer; Add the organic binder bond (20kg amido formic acid fat resin, 5kg polypropylene glue) that 25kg mixes, compound compression molding after the spice machine mixes; Put into activation furnace; 100 ℃ of following activation also dry 2 hours, cross the filter core cooling, vacuum packaging obtains block dry filter core product.
Through measuring, the dry filter core product has following character.Static Water absorption: 17.5%, the package water content: 1.0%, intensity 1850N, product are applicable to the R410a that must deacidify, R407c, R134a, R22 refrigeration system.
Claims (8)
1. the new prescription of a dry filter core for refrigerating system; It is characterized in that; This prescription comprises inorganic component and organic component, and described inorganic component is selected from any one or a few in molecular sieve, activated alumina, silica gel and the active carbon, and described organic component is an organic binder bond.
2. the new prescription of dry filter core for refrigerating system according to claim 1 is characterized in that, described organic binder bond is selected from any one or a few in amido formic acid fat resin, polypropylene glue and the furane resins.
3. the new prescription of dry filter core for refrigerating system according to claim 1; It is characterized in that described inorganic component comprises molecular sieve 30～100 weight portions in weight portion; Activated alumina 0～60 weight portion; Silica gel 0～20 weight portion, active carbon 0～10 weight portion, component is all calculated with butt in the prescription.
4. according to the new prescription of claim 1 or 3 described dry filter core for refrigerating system; It is characterized in that, in the described inorganic component, preferred 60～100 weight portions of molecular sieve; Preferred 30～60 weight portions of activated alumina; Preferred 5～15 weight portions of silica gel, preferred 3～8 weight portions of active carbon, component is all calculated with butt in the prescription.
5. the new prescription of dry filter core for refrigerating system according to claim 2; It is characterized in that; Described organic binder bond comprises amido formic acid fat resin 30～90 weight portions, polypropylene glue 0～30 weight portion in weight portion; Furane resins 0～70 weight portion, component is all calculated with butt in the prescription.
6. the new prescription of dry filter core for refrigerating system according to claim 1 is characterized in that, in weight percentage, the ratio of described inorganic component and organic component is 70～95 weight %:30～5 weight %.
7. according to the new prescription of claim 1,3 or 4 described dry filter core for refrigerating system, it is characterized in that described molecular sieve is spherical or irregular shaped molecular sieve.
8. preparation method by the described dry filter core for refrigerating system of claim 1; It is characterized in that; This method comprises following preparation process: the inorganic component of the dry filter core of configuration amount is mixed; The organic binder bond that adds configuration amount then is with the inorganic component molding bonded, and 100 ℃～300 ℃ following activation also dry 2～4 hours, the cooling final vacuum was packaged to be block dry filter core product.
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| CN2011104284719A CN102489247A (en) | 2011-12-20 | 2011-12-20 | New formula and preparation method of dry filtering core for refrigerating system |
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| CN2011104284719A CN102489247A (en) | 2011-12-20 | 2011-12-20 | New formula and preparation method of dry filtering core for refrigerating system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106000318A (en) * | 2016-08-02 | 2016-10-12 | 含山县科宇环境工程有限公司 | Multifunctional adsorbent and preparation method thereof |
| CN109126397A (en) * | 2018-09-29 | 2019-01-04 | 杭州超通科技有限公司 | A kind of preparation method of molecular sieve dry filter core |
| CN113842754A (en) * | 2021-10-14 | 2021-12-28 | 河北瀚泰电气设备制造有限公司 | Special dehumidifying agent for box-type transformer substation |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3545622A (en) * | 1967-07-27 | 1970-12-08 | Alco Controls Corp | Permeable filter and drier block |
| CN101166571A (en) * | 2005-01-21 | 2008-04-23 | 穆尔蒂索伯技术有限公司 | Resin bonded sorbent |
-
2011
- 2011-12-20 CN CN2011104284719A patent/CN102489247A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3545622A (en) * | 1967-07-27 | 1970-12-08 | Alco Controls Corp | Permeable filter and drier block |
| CN101166571A (en) * | 2005-01-21 | 2008-04-23 | 穆尔蒂索伯技术有限公司 | Resin bonded sorbent |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106000318A (en) * | 2016-08-02 | 2016-10-12 | 含山县科宇环境工程有限公司 | Multifunctional adsorbent and preparation method thereof |
| CN109126397A (en) * | 2018-09-29 | 2019-01-04 | 杭州超通科技有限公司 | A kind of preparation method of molecular sieve dry filter core |
| CN113842754A (en) * | 2021-10-14 | 2021-12-28 | 河北瀚泰电气设备制造有限公司 | Special dehumidifying agent for box-type transformer substation |
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Application publication date: 20120613 |