CN101736843A - Waste polyurethane rigid foam (PURF) building block and environment-friendly use technique - Google Patents
Waste polyurethane rigid foam (PURF) building block and environment-friendly use technique Download PDFInfo
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- CN101736843A CN101736843A CN200810143560A CN200810143560A CN101736843A CN 101736843 A CN101736843 A CN 101736843A CN 200810143560 A CN200810143560 A CN 200810143560A CN 200810143560 A CN200810143560 A CN 200810143560A CN 101736843 A CN101736843 A CN 101736843A
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- hard polyurethane
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Abstract
The invention provides a waste polyurethane rigid foam (PURF) building block and an environment-friendly use technique, solving the difficult problem of recycling a great amount of waste polyurethane rigid foam (PURF) which pollutes the environment more and more serious. The use technique comprises the following steps: performing horizontal sawing and vertical sawing on the RURF to obtain a building block the four edges of which are all hexahedral, splicing, stacking, laminating, bonding by using homo foamed polyurethane foam, superficial coating to generate wall body elements, thus being used in efficient heat insulating works with repeated utilization rate of 85%. Compared with the current assembled refrigeration house, as for the small-scale low temperature refrigeration house, the actually-measured total construction cost is lowered by over 50%, the power consumption is reduced by 183%, the thermal insulation property is excellent and the cost is low. The technological process has the advantages of having no three waste emissions, realizing the recycling of the waste PURF in an industrial scale and leading the recycling of the PURF to proceed to a practical stage with economical value.
Description
Technical field
The present invention relates to the recovery and utilization technology of discarded heat insulating material, the environmental protection treatment, the particularly building block of waste hard polyurethane foam and environmental protection that are specifically related to the waste polyurethane foam are utilized technology.
Background technology
The various heat insulating materials of market sale now have lower coefficient of thermal conductivity, are widely used on the heat-insulation and heat-preservation of chiller plant, industrial heating pipeline and building and heating refrigeration piping and buildings such as refrigerator, refrigerator, freezer.Application mode has: 1. the heat insulation wall of roof insulation layer, civil engineering freezer, cork commonly used, expanded vermiculite, perlite are filled interlayer, cork coefficient of thermal conductivity 0.035～0.07, expanded vermiculite coefficient of thermal conductivity 0.04～0.06, perlite low temperature coefficient of thermal conductivity 0.024～0.033 are perhaps made wall constructed, the roofing of foam cement product with them.2. the isolation layer of panel-assembled cold store, normal polystyrol plastic foam plate material, Vestolit sheet material and the RPUF sheet material of adopting is made insulated core material, be equipped with that glass fiber reinforced plastic, aluminium alloys, stainless sheet steel, composite panel of plastic material are made wainscot, outer panels becomes body of wall, top layer and Ku Nei ground, polystyrol plastic foam plate material coefficient of thermal conductivity 0.0271～0.04, Vestolit sheet material 0.035～0.045, RPUF sheet material 0.02～0.038.3. the industrial heating pipeline is used asbestos cord goods spiral always around bundle outside the pipe, extensively adopts the foam cement of perlite, expanded vermiculite to make the shape material in semicircular cross section in recent years, amalgamation outside pipe.4. Jian Zhu heating and refrigeration pipeline and petrochemical industry pipeline extensively adopt RPUF to make the shape material in semicircular cross section, amalgamation outside pipe at present.
Wherein RPUF is because of rate of closed hole, tack, nontoxic, corrosion-resistant, low temperature resistant, intensity, heat-proof quality excellence, become the first-selection of the heat-insulation and heat-preservation of 120 ℃ of following environments for use day by day, but buy the with high costs of finished product sheet material, shape material and job site foaming, every cubic metre nearly 2,000 yuan, cost factor becomes the huge obstruction of its extensive use.It is over half that the cost of heat-insulation and heat-preservation material accounts for the total cost of pre-fabricated walk-in freezer, and the total cost of assembling cold storage medium is more than 65%.How to reduce the cost of heat-insulation and heat-preservation material, thereby control the total cost of middle-size and small-size freezer, can use the excellent properties of RPUF again, thirsted for by industry always;
On the other hand, pile up like a mountain for a large amount of discarded hard polyurethane foams heat insulating materials of dismounting such as refrigerator, refrigerator, recycling that can't be economic at present, hard polyurethane foams can not natural degradation, also extremely difficult with chemical method dissolving and depolymerization, do not find so far it is carried out the effective ways that cracking, depolymerization become urethane monomer or be degraded to subset.Big public hazards that burn at present, landfill become contaminated environment, how in addition economic to this refuse recycling realize its social benefit and economic benefit, all circles are equipped with and are concern.
Last century, the eighties began, and China popularizes in a large number and uses refrigerator, refrigerator, and the social recoverable amount of China's refrigerator, refrigerator is about 1.5 hundred million, 10～15 years application life of refrigerator, 5～10 years application life of refrigerator at present.China in 1991 become the signatories to a treaty of " Montreal Protocol on Substances that Deplete the Ozone Layer amendment ", fulfil to ban use of for the end of the year 2000 freon to make cold-producing medium and blowing agent.The refrigerator of producing before the end of the year 2000, the insulating of refrigerator all use and contain the hard polyurethane foams that 10% freon CFC-11 makes blowing agent, the product of producing in eight, 90 years has in recent years all entered the retired climax of scrapping, becomes the recessive killer of earth's ozone layer material.Therefore Chinese patent CN100998986A has proposed the foam pulverizing, has collected the recovery scheme that freon CFC-11 is collapsed into liquid at the pollution problem of the discarded hard polyurethane foams heat insulating material of fluorine foaming.But because the hard polyurethane foams powder does not utilize outlet, only reclaim freon CFC-11, its recovery technology cost is higher than the price of the freon CFC-11 after the recovery far away, and this scheme does not have economic worth, can not be applied.And the foaming of hard polyurethane foams air and the floride-free PPG of broad development are assisted foaming technique in recent years, as Chinese patent CN1417243A and the now widely used pair of floride-free foam process of component, make the scheme of this application not have freon CFC-11 can supply to reclaim.
In addition, Chinese patent CN101012332A has proposed the scheme of utilizing that lignin, waste hard polyurethane foam powder prepare the fluorine-free hard polyurethane foam green wood, but the addition of waste hard polyurethane foam powder has only weight ratio 0.1～2%, for a large amount of waste hard polyurethane foams, an utterly inadequate amount, utilization rate are too low.
Chinese patent CN101096426A has proposed pulverizing waste hard polyurethane foam, its 100～300 powder material mixes the recycling scheme of floride-free foaming once more as filler, disclosed addition rises to 10～30% of gross weight, but by the floride-free foam process of known pair of component of its disclosed employing, generative foaming can not reach the yield rate of economically valuable, test shows: actual finished product limit addition is difficult to surpass aforementioned Chinese patent CN101012332A disclosed 2%, otherwise, bigger epidermis cavity appears, subside, fragility is big, intensity is low, rate of closed hole, water imbibition, thermal insulations etc. do not reach GB/T 20672～20673-2006, GB/T12812-2006, GB/T 10799-2008, GB/T 21332-2008, GB/T 21558-2008, QB/T2904-2007, the requirement of standard codes such as HJ/T 233-2006; Technical literature also states clearly both at home and abroad: addition reaches at 4% o'clock, and polyhydric alcohol conjugate polyether (A component) viscosity sharply increases, and forms paste, can not use; Think that its mechanism of action is after our experiment: when addition was big, its closed hole was by polyhydric alcohol conjugate polyether dissolved destruction in the A component, and the A component penetrates in the hard polyaminoester powder hole, can not mix with the B component to carry out polymeric chemical and react; We think that the effect of the disclosed technical scheme of this application leaves a question open.
Only pipe in recent years, discarded flexible polyurethane foams adopts the recycling scheme of mixing floride-free foaming once more, existing bigger breakthrough, as CN1102837, CN1132762, CN1182663A, CN1093548C and United States Patent (USP) 4666646 disclosed processing methods, reached the technical grade practical stage, the pilot product quality reaches application requirements, can satisfy cushion sofa, mattress, stadiums floor and pack shockproof, sound absorption, anti-skidding needs.This can dissolve each other with discarded flexible polyurethane foams powder under the generative foaming temperature owing to known discarded flexible polyurethane foams technical recipe, and is affine mutually, and chemical reaction takes place.And the waste hard polyurethane powder is in the floride-free foam process of known pair of component, do not possess this condition, this depends on following basic research and obtains important breakthrough, to carry out chemolysis and depolymerization to it, look for and carry out the effective ways that cracking, depolymerization become urethane monomer or be degraded to subset, find technological parameters such as suitable depolymerization catalyzer, suitable temperature, pressure, concentration, perhaps the floride-free foam process of existing known pair of component is carried out significant improvement, make the composition and the waste hard polyurethane foam powder of two components affine mutually, hot-forming; This is the direction that the generative foaming of the waste hard polyurethane of the high heat-proof quality of development is recycled.
The recycling aspect of the heat insulation waste hard polyurethane of low performance also has another not walk the thinking of generative foaming.Chinese patent CN1278997C has proposed can fill waste hard polyurethane powder 10～30% in the construction wall warming plate, and with other inorganic building material and bonding agent cast drying and moulding, but application surface is little, only is only applicable to the low construction wall of heat-proof quality.
The combined wall and the construction technology of Chinese patent CN100370089C hard polyurethane foams, in the dependent claims, proposed to add the regeneration hard polyurethane foams heat-insulation wall plate of aluminium powder, hollow glass micropearl, polyurethane adhesive, interpolation waste hard polyurethane foam powder, but with high costs, and the adding aluminium powder has reduced heat-proof quality.
The practice of utilizing the waste hard polyurethane foam without a small amount of of pulverizing is also arranged in construction among the people, adopt the bonding irregular waste polyurethane foam piece of the direct amalgamation of viscose glue, but, viscose glue consumes greatly, work efficiency is low, cost is high, be difficult to obtain the bigger feature dimension of rule, the temperature ductility of seam mucilage materials and polyurethane foamed blocks is inconsistent, and distortion when low temperature, cracking can not large-scale production and application.
Summary of the invention
The objective of the invention is to overcome the defective of above-mentioned known technology, environmental protection, recovery and reuse of waste and high-efficiency insulated combining, providing can be high for heat-insulation and heat-preservation extensive use and construction efficiency, that heat-insulating property excellence and cost are cheap, high recovery utilization rate and " building block and the environmental protection of waste hard polyurethane foam utilize technology " that can repeatedly recycle, reduce environment pollution.
The technical problem that the present invention solves can realize by following technical scheme.
The building block of waste hard polyurethane foam, at least comprise the building block 2 of the body rule after the processing and the building block 2 and the cracking resistance overcoat 4 of the body rule after tack coat 3 or the processing, it is characterized in that: with discarded hard polyurethane foams 1 is raw material, be processed into the close and regular building block of feature dimension 2, pile up and stacked building block 2 between be provided with tack coat 3, building block 2 and tack coat 3 have akin, closed insulation microporous structure;
Above-mentioned building block 2 and at least one side of tack coat 3 are provided with the cracking resistance overcoat 4 that is combined into by glass fiber screen cloth and epoxy resin, cracking resistance overcoat 4 or compound by polyethylene screen cloth, woven bag screen cloth, asbestos screen cloth and epoxy resin;
Above-mentioned building block 2 and at least one side of tack coat 3 are provided with the cracking resistance overcoat 4 that is made of plastic plate or metal sheet, and cracking resistance overcoat 4 is bonded to one by the hard polyaminoester of foaming is filled with building block 2 and tack coat 3;
Above-mentioned building block 2 and at least one side of tack coat 3 are provided with the cracking resistance overcoat 4 that is made of plastic plate or metal sheet, and the normal direction of cracking resistance overcoat 4 is provided with skeleton gusset 5, and they are bonded to one by the hard polyaminoester of foaming is filled;
Above-mentioned building block 2 is set to four limit hexahedrons, by discarded hard polyurethane foams 1 through the sawing machine level cut, longitudinally cutting constitutes;
The environmental protection of waste hard polyurethane foam utilizes technology, it is characterized in that: with irregular block waste hard polyurethane foam is raw material, classify according to profile, building block 2 through being cut into geometrical body, size standard or be ground into ￠ 5～30mm foam beads 7, and then be applied to be lower than thermal insulation below 120 ℃ and following arbitrary subitem technology of heat insulating work:
1. building block 2 is bonded in the surface for the treatment of insulation with other member with the blown rigid polyurethane foam;
2. building block 2 forms heat preservation plate material with other member with blown rigid polyurethane foam bonding;
3. the folder of foam beads 7 direct filling insulating wall bodies 6 is aerial, compacting sealing, separating atmospheric.
The inventor is based on more than two decades abundant pragmatic experience and professional knowledge, through constantly studying, design, and studies sample and improvement repeatedly and obtains the present invention.
The present invention originally has many-sided advantage: 1. at the big or small profile recycling of discarded polyurethane foam, utilization rate reaches 85%; 2. use the small-sized low-temperature cold store that the present invention makes, the actual measurement total cost reduces more than 50%, and power consumption reduces 183%, heat-insulating property excellence and cost is cheap; 3. technological process does not have chemical reaction; there are not the three wastes to produce discharging; realize that industrially scalable recycles discarded polyurethane foam, solving when serious environmental is polluted day by day, make the recycling of polyurethane foam march toward the practical stage of economically valuable.
Description of drawings
Further specify the present invention below by the drawings and specific embodiments.
Fig. 1 is a process flow diagram of the present invention;
Fig. 2 is the horizontal plane processing schematic diagram of waste hard polyurethane foam;
Fig. 3 is the vertical plane processing schematic diagram of waste hard polyurethane foam;
Fig. 4 is the profile three-dimensional structure diagram of the hexahedral building block in four limits;
Fig. 5 is the profile three-dimensional structure diagram of multi-layer building block;
Fig. 6 is the three-dimensional structure diagram of building block, skeleton gusset and the tack coat of embodiment 1;
Fig. 7 is building block, the skeleton gusset of embodiment 2 sheet materials, the sectional structure chart of cracking resistance overcoat;
Fig. 8 is the foam beads of embodiment 3 bodies of wall, the sectional structure chart of cracking resistance overcoat;
The specific embodiment
Below the described specific embodiment only be explanation to this example, after having read above-mentioned statement content of the present invention, those skilled in the art can make various changes or modifications the present invention, and these equivalent form of values fall within the limited range of the application's appended claims equally.
Below in conjunction with drawings and Examples,, be described further concrete structure of the present invention, feature, the course of work and effect thereof.
Building block and environmental protection as Fig. 1 to Fig. 5 and waste hard polyurethane foam shown in Figure 6 utilize technology, the waste hard polyurethane foam 1 of elder generation to reclaiming, cleaning, air-dry, go-no-go, horizontal sawing, vertical sawing become the hexahedral building block 2 in four limits, be bonded to multi-layer building block with the polyurathamc amalgamation, again with the glass fiber screen cloth with brush the cracking resistance overcoat 4 that epoxy resin is combined into and constitute the freezer wallboards; Piece together the storehouse, seal with glass cement, polyurathamc at seam crossing again, constitute the body of wall of panel-assembled cold store.
Building block and environmental protection as Fig. 1 to Fig. 5 and waste hard polyurethane foam shown in Figure 7 utilize technology, the waste hard polyurethane foam 1 of elder generation to reclaiming, cleaning, air-dry, go-no-go, horizontal sawing, vertical sawing become the hexahedral building block 2 in four limits, be bonded to multi-layer building block with the polyurathamc amalgamation, perhaps the cracking resistance overcoat 4 that constitutes with plastic plate or metal sheet again is bonded to the freezer wallboard, as the wall body construction of panel-assembled cold store.
Building block and environmental protection as Fig. 1 to Fig. 5 and waste hard polyurethane foam shown in Figure 8 utilize technology, the waste hard polyurethane foam 1 of elder generation to reclaiming, cleaning, air-dry, go-no-go, surplus material after building block cut sieves, pulverize and obtain ￠ 5～30mm foam beads 7, foam beads 7 directly is filled in the middle of the interlayer of the heat-preserving wall 6 that cork builds by laying bricks or stones, the compacting sealing, separating atmospheric, the completion of civil engineering freezer body of wall.
The comparison of the above embodiment of the present invention and known solution:
| Utilize mode | Feasibility | Recovery utilization rate | Cost | Heat-insulating property | Economic worth | Suitable application | |
| ??CN100998986A | Physics/powder | Scheme is feasible | Extremely low | High | ??- | Very low | Reclaim freon |
| ??CN101012332A | Chemistry/foaming | Scheme is feasible | ??≤2％ | Lower | ??0.018 | Relatively poor | The refrigeration insulation |
| ??CN1278997C | Weathering/filler | Scheme is feasible | ??10～30％ | Lower | Difference | Better | Building heat preservation is heat insulation |
| ??CN101096426A | Chemistry/foaming | Scheme leaves a question open | ??10～30％ | ??- | ??- | ??- | ??- |
| Utilize mode | Feasibility | Recovery utilization rate | Cost | Heat-insulating property | Economic worth | Suitable application | |
| ??CN100370089C | Bonding/foaming | Scheme is feasible | ??80％ | High | ??0.028 | Generally | Building heat preservation is |
| Embodiment | |||||||
| 1 | Physics/bulk | Use | ??≥95％ | Extremely low | Excellent | Fabulous | Panel-assembled |
| Embodiment | |||||||
| 2 | Physics/bulk | Use | ??≥95％ | Extremely low | Good | Good | The building heat |
| Embodiment | |||||||
| 3 | Physics/particle | Use | ??≥95％ | Extremely low | Good | Good | Civil engineering formula freezer |
Claims (6)
1. the building block of waste hard polyurethane foam, at least comprise the building block 2 of the body rule after the processing and the building block 2 and the cracking resistance overcoat 4 of the body rule after tack coat 3 or the processing, it is characterized in that: with discarded hard polyurethane foams 1 is raw material, be processed into the close and regular building block of feature dimension 2, pile up and stacked building block 2 between be provided with tack coat 3, building block 2 and tack coat 3 have akin, closed insulation microporous structure.
2. the building block of waste hard polyurethane foam according to claim 1, it is characterized in that: above-mentioned building block 2 and at least one side of tack coat 3 are provided with the cracking resistance overcoat 4 that is combined into by glass fiber screen cloth and epoxy resin, cracking resistance overcoat 4 or compound by polyethylene screen cloth, woven bag screen cloth, asbestos screen cloth and epoxy resin.
3. the building block of waste hard polyurethane foam according to claim 1, it is characterized in that: above-mentioned building block 2 and at least one side of tack coat 3 are provided with the cracking resistance overcoat 4 that is made of plastic plate or metal sheet, and cracking resistance overcoat 4 is bonded to one by the hard polyaminoester of foaming is filled with building block 2 and tack coat 3.
4. the building block of waste hard polyurethane foam according to claim 1, it is characterized in that: above-mentioned building block 2 and at least one side of tack coat 3 are provided with the cracking resistance overcoat 4 that is made of plastic plate or metal sheet, the normal direction of cracking resistance overcoat 4 is provided with skeleton gusset 5, and they are bonded to one by the hard polyaminoester of foaming is filled.
5. the building block of waste hard polyurethane foam according to claim 1 is characterized in that: above-mentioned building block 2 is set to four limit hexahedrons, by discarded hard polyurethane foams 1 through the sawing machine level cut, longitudinally cutting constitutes.
6. the environmental protection of waste hard polyurethane foam utilizes technology, it is characterized in that: with irregular block waste hard polyurethane foam is raw material, classify according to profile, building block 2 through being cut into geometrical body, size standard or be ground into ￠ 5～30mm foam beads 7, and then be applied to be lower than thermal insulation below 120 ℃ and following arbitrary subitem technology of heat insulating work:
1) building block 2 is bonded in the surface for the treatment of insulation with other member with the blown rigid polyurethane foam;
2) building block 2 forms heat preservation plate material with other member with blown rigid polyurethane foam bonding;
3) folder of foam beads 7 direct filling insulating wall bodies 6 is aerial, compacting sealing, separating atmospheric.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810143560A CN101736843A (en) | 2008-11-11 | 2008-11-11 | Waste polyurethane rigid foam (PURF) building block and environment-friendly use technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810143560A CN101736843A (en) | 2008-11-11 | 2008-11-11 | Waste polyurethane rigid foam (PURF) building block and environment-friendly use technique |
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| Publication Number | Publication Date |
|---|---|
| CN101736843A true CN101736843A (en) | 2010-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810143560A Pending CN101736843A (en) | 2008-11-11 | 2008-11-11 | Waste polyurethane rigid foam (PURF) building block and environment-friendly use technique |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102587542A (en) * | 2011-01-13 | 2012-07-18 | 谢兆坤 | Method for producing wall with building waste |
| CN102748560A (en) * | 2012-07-09 | 2012-10-24 | 关志强 | Method for production of vacuum insulation plate via reutilization of rigid polyurethane foam |
| CN105500861A (en) * | 2015-12-17 | 2016-04-20 | 安徽助成信息科技有限公司 | Anti-corrosion wood-plastic composite board |
| CN106827356A (en) * | 2017-01-23 | 2017-06-13 | 马德亮 | A kind of method that waste hard polyurethane foam plastic recycling prepares warming plate and cold storage plate |
| IT201900018623A1 (en) * | 2019-10-11 | 2021-04-11 | Romiplast S R L | Insulating filler material for the wall of building structures |
-
2008
- 2008-11-11 CN CN200810143560A patent/CN101736843A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102587542A (en) * | 2011-01-13 | 2012-07-18 | 谢兆坤 | Method for producing wall with building waste |
| CN102748560A (en) * | 2012-07-09 | 2012-10-24 | 关志强 | Method for production of vacuum insulation plate via reutilization of rigid polyurethane foam |
| CN102748560B (en) * | 2012-07-09 | 2015-01-07 | 关志强 | Method for production of vacuum insulation plate via reutilization of rigid polyurethane foam |
| CN105500861A (en) * | 2015-12-17 | 2016-04-20 | 安徽助成信息科技有限公司 | Anti-corrosion wood-plastic composite board |
| CN106827356A (en) * | 2017-01-23 | 2017-06-13 | 马德亮 | A kind of method that waste hard polyurethane foam plastic recycling prepares warming plate and cold storage plate |
| IT201900018623A1 (en) * | 2019-10-11 | 2021-04-11 | Romiplast S R L | Insulating filler material for the wall of building structures |
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Open date: 20100616 |