CN107722454B - Heat preservation pipe and preparation method thereof - Google Patents
Heat preservation pipe and preparation method thereof Download PDFInfo
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- CN107722454B CN107722454B CN201711035308.XA CN201711035308A CN107722454B CN 107722454 B CN107722454 B CN 107722454B CN 201711035308 A CN201711035308 A CN 201711035308A CN 107722454 B CN107722454 B CN 107722454B
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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Abstract
The invention relates to the technical field of pipe product manufacturing, in particular to a heat preservation pipe and a preparation method thereof, wherein in the prior art, the preparation process of the heat preservation pipe is adjusted, the selection of raw materials and the proportion of partial raw materials are adjusted, urea modified zeolite powder is added, the physical property and the anti-aging property of the heat preservation pipe are improved, the heat conduction coefficient is reduced to a certain extent, the comprehensive property of the heat preservation pipe is improved, the tensile strength of the prepared heat preservation pipe reaches 23.15-24.61 MPa, the elongation at break reaches 483-492%, the heat conduction coefficient reaches below 0.013W/m.k, and the physical property of the heat preservation pipe is improved to a great extent.
Description
Technical Field
The invention relates to the technical field of pipe product manufacturing, in particular to a heat preservation pipe and a preparation method thereof.
Background
At present, people's consciousness of energy conservation in various production and life is continuously improved, and heat-insulating coating materials are widely used in various industrial pipelines, kilns, buildings and the like. The existing commonly used heat insulation materials such as asbestos, glass fiber felt, aluminum silicate cotton or glass fiber cloth and the like mostly adopt means for increasing the thickness of the materials in order to improve the heat insulation effect, but due to the fact that the thickness of the materials is increased when the heat insulation materials need to be coated on a pipeline, the coating effect and the number of layers of the coating can be influenced.
In view of this, some researchers have studied on the heat preservation pipe, for example, in the prior art document with patent number 201610472416.2, glass fiber, water glass, nano-silica, perlite, polypropylene resin, phosphogypsum powder, bentonite and polyethylene are adopted to carry out reasonable compatibility treatment, the raw materials are treated and technical parameter control is carried out in the preparation process, electron beam radiation and salt bath treatment of a vulcanizing tank are adopted, so that the physical properties of the heat preservation pipe are improved, the tensile strength and the elongation at break are improved, the heat insulation effect is improved, and the heat conduction coefficient is reduced, so that the heat preservation pipe reaches 0.016-0.019W/m.k.
However, in the treatment process, the thermal insulation performance of the prepared thermal insulation pipe is still not ideal, and particularly the physical performance of the prepared thermal insulation pipe is still poor, so that the aging resistance is poor, and the service life of the thermal insulation pipe is influenced.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides a heat preservation pipe and a preparation method thereof.
The method is realized by the following technical scheme:
the preparation method of the heat preservation pipe comprises the following steps:
(1) weighing raw materials: 0.1-0.3g of glass fiber, 0.01-0.03g of water glass, 0.1-0.7g of nano silicon dioxide, 1-3g of perlite, 5-9g of polypropylene resin, 0.1-0.3g of phosphogypsum powder, 0.08-0.12g of bentonite, 3-6g of polyethylene and 0.1-0.7g of modified zeolite powder;
(2) mixing nano silicon dioxide, perlite and bentonite, grinding, sieving by a 40-60-mesh sieve, adding glass fiber and water glass, and uniformly stirring to obtain a mixed material a;
(3) mixing and stirring the phosphogypsum powder and the polypropylene resin uniformly, performing ultraviolet irradiation treatment for 30-40min, adding polyethylene, and stirring uniformly to obtain a mixed material b;
(4) mixing the mixed material b with the modified zeolite powder, treating at 140 ℃ for 10-20s at the temperature of 120-.
Preferably, in the step (1), the raw materials include 0.2g of glass fiber, 0.02g of water glass, 0.5g of nano silicon dioxide, 2g of perlite, 6g of polypropylene resin, 0.2g of phosphogypsum powder, 0.1g of bentonite, 5g of polyethylene and 0.3g of modified zeolite powder.
Preferably, the modified zeolite powder is prepared by heating zeolite to 180 ℃, watering and airing to form powder, adding urea accounting for 1% of the mass of the zeolite, and uniformly stirring.
Preferably, the salt bath of the vulcanizing tank adopts a sulfite solution and/or an ammonium sulfide solution.
Preferably, the sulfite solution is one of a potassium sulfite solution and a sodium sulfite solution.
Preferably, the molar concentration of the sulfite solution is 1.3 mol/L.
Preferably, the molar concentration of the ammonium sulfide solution is 1.5 mol/L.
Preferably, the salt, sulfite, is dissolved in the mixture with the ammonium sulfide solution in a mass ratio of 1: 1.
Also provides the heat-insulating pipe prepared by the preparation method of the heat-insulating pipe.
Compared with the prior art, the invention has the technical effects that:
according to the prior art, the preparation process of the heat-insulating pipe is adjusted, the selection of raw materials and part of the proportion are adjusted, and the addition of the urea modified zeolite powder is combined, so that the physical property and the anti-aging property of the heat-insulating pipe are improved, the heat conduction coefficient is reduced to a certain extent, the comprehensive performance of the heat-insulating pipe is improved, the tensile strength of the prepared heat-insulating pipe reaches 23.15-24.61 MPa, the elongation at break reaches 483-492%, the heat conduction coefficient reaches below 0.013W/m.k, and the physical property of the heat-insulating pipe is greatly improved.
Detailed Description
The technical solution of the present invention is further defined below with reference to the specific embodiments, but the scope of the claims is not limited to the description.
Example 1
The preparation method of the heat preservation pipe comprises the following steps:
(1) weighing raw materials: 0.1g of glass fiber, 0.01g of water glass, 0.1g of nano silicon dioxide, 1g of perlite, 5g of polypropylene resin, 0.1g of phosphogypsum powder, 0.08g of bentonite, 3g of polyethylene and 0.1g of modified zeolite powder;
(2) mixing nano silicon dioxide, perlite and bentonite, grinding, sieving by a 40-mesh sieve, adding glass fiber and water glass, and uniformly stirring to obtain a mixed material a;
(3) mixing and stirring the phosphogypsum powder and the polypropylene resin uniformly, performing ultraviolet irradiation treatment for 30min, adding polyethylene, and stirring uniformly to obtain a mixed material b;
(4) and (3) mixing the mixed material b with the modified zeolite powder, treating at 120 ℃ for 10s, adding the mixed material a, stirring uniformly, forming by a forming machine, treating in a salt bath of a vulcanizing tank for 20min, and cooling to obtain the catalyst. The modified zeolite powder is prepared by heating zeolite to 180 ℃, watering and airing to form powder, adding urea accounting for 1% of the mass of the zeolite, and uniformly stirring. The salt bath of the vulcanizing tank adopts sodium sulfite solution with the molar concentration of 1.3mol/L as the salt solution for treatment.
Example 2
The preparation method of the heat preservation pipe comprises the following steps:
(1) weighing raw materials: 0.3g of glass fiber, 0.03g of water glass, 0.7g of nano silicon dioxide, 3g of perlite, 9g of polypropylene resin, 0.3g of phosphogypsum powder, 0.12g of bentonite, 6g of polyethylene and 0.7g of modified zeolite powder;
(2) mixing nano silicon dioxide, perlite and bentonite, grinding, sieving by a 60-mesh sieve, adding glass fiber and water glass, and uniformly stirring to obtain a mixed material a;
(3) mixing and stirring the phosphogypsum powder and the polypropylene resin uniformly, performing ultraviolet irradiation treatment for 40min, adding polyethylene, and stirring uniformly to obtain a mixed material b;
(4) and (3) mixing the mixed material b with the modified zeolite powder, treating at the temperature of 140 ℃ for 20s, adding the mixed material a, uniformly stirring, forming by a forming machine, treating in a salt bath of a vulcanizing tank for 30min, and cooling to obtain the catalyst. The modified zeolite powder is prepared by heating zeolite to 180 ℃, watering and airing to form powder, adding urea accounting for 1% of the mass of the zeolite, and uniformly stirring. The salt bath of the vulcanizing tank adopts a potassium sulfite solution with the molar concentration of 1.3mol/L as a salt solution for treatment.
Example 3
The preparation method of the heat preservation pipe comprises the following steps:
(1) weighing raw materials: 0.2g of glass fiber, 0.02g of water glass, 0.5g of nano silicon dioxide, 2g of perlite, 7g of polypropylene resin, 0.2g of phosphogypsum powder, 0.11g of bentonite, 5g of polyethylene and 0.4g of modified zeolite powder;
(2) mixing nano silicon dioxide, perlite and bentonite, grinding, sieving with a 50-mesh sieve, adding glass fiber and water glass, and uniformly stirring to obtain a mixed material a;
(3) mixing and stirring the phosphogypsum powder and the polypropylene resin uniformly, performing ultraviolet irradiation treatment for 35min, adding polyethylene, and stirring uniformly to obtain a mixed material b;
(4) and (3) mixing the mixed material b with the modified zeolite powder, treating at the temperature of 130 ℃ for 15s, adding the mixed material a, uniformly stirring, forming by a forming machine, treating in a salt bath of a vulcanizing tank for 25min, and cooling to obtain the catalyst. The modified zeolite powder is prepared by heating zeolite to 180 ℃, watering and airing to form powder, adding urea accounting for 1% of the mass of the zeolite, and uniformly stirring. The salt bath of the vulcanizing tank adopts an ammonium sulfide solution with the molar concentration of 1.5mol/L as a salt solution for treatment.
Example 4
The preparation method of the heat preservation pipe comprises the following steps:
(1) weighing raw materials: 0.3g of glass fiber, 0.01g of water glass, 0.6g of nano silicon dioxide, 2g of perlite, 6g of polypropylene resin, 0.3g of phosphogypsum powder, 0.08g of bentonite, 6g of polyethylene and 0.1g of modified zeolite powder;
(2) mixing nano silicon dioxide, perlite and bentonite, grinding, sieving by a 40-mesh sieve, adding glass fiber and water glass, and uniformly stirring to obtain a mixed material a;
(3) mixing and stirring the phosphogypsum powder and the polypropylene resin uniformly, performing ultraviolet irradiation treatment for 40min, adding polyethylene, and stirring uniformly to obtain a mixed material b;
(4) and (3) mixing the mixed material b with the modified zeolite powder, treating at 120 ℃ for 17s, adding the mixed material a, uniformly stirring, forming by a forming machine, treating in a salt bath of a vulcanizing tank for 26min, and cooling to obtain the catalyst. The modified zeolite powder is prepared by heating zeolite to 180 ℃, watering and airing to form powder, adding urea accounting for 1% of the mass of the zeolite, and uniformly stirring. The salt bath of the vulcanizing tank is a mixed solution prepared by mixing a sodium sulfite solution with the molar concentration of 1.3mol/L and an ammonium sulfide solution with the molar concentration of 1.5mol/L according to the mass ratio of 1:1, and is used as a salt solution for treatment.
Example 5
On the basis of example 4, the modified zeolite powder is obtained by directly heating the modified zeolite powder to 180 ℃, watering and weathering the modified zeolite powder into powder.
The heat-insulating pipes prepared in examples 1 to 5 were cut into short pipes of 50cm in length, and 100 pieces of each example were selected for physical property and heat conductivity measurement. The average values were calculated and the results are shown in table 1 below:
TABLE 1
| Tensile strength MPa | Elongation at break% | Coefficient of thermal conductivity W/m.k | |
| Example 1 | 24.09 | 492.31 | 0.012 |
| Example 2 | 24.61 | 485.16 | 0.013 |
| Example 3 | 23.89 | 483.54 | 0.009 |
| Example 4 | 23.15 | 487.19 | 0.011 |
| Example 5 | 19.83 | 453.12 | 0.021 |
As shown in the data in Table 1, the thermal insulation pipe has good physical properties, low heat conduction coefficient and good thermal insulation effect.
In addition, the researchers further performed anti-aging test treatment on the prepared thermal insulation pipes, and performed anti-aging test on 100 thermal insulation pipes selected from each group, under the conditions of 160 ℃ and 200h, the physical property change after the treatment is as shown in the following table 2:
TABLE 2
| Tensile strength MPa | Elongation at break% | |
| Example 1 | 23.46 | 476.31 |
| Example 2 | 23.18 | 479.52 |
| Example 3 | 23.14 | 478.34 |
| Example 4 | 22.76 | 469.58 |
| Example 5 | 17.81 | 431.46 |
The data in table 2 show that the anti-aging performance is excellent, the service life of the heat-insulating pipe is prolonged, and the heat-insulating use cost is reduced.
Claims (8)
1. A method for preparing a heat preservation pipe is characterized by comprising the following steps:
(1) weighing raw materials: 0.1-0.3g of glass fiber, 0.01-0.03g of water glass, 0.1-0.7g of nano silicon dioxide, 1-3g of perlite, 5-9g of polypropylene resin, 0.1-0.3g of phosphogypsum powder, 0.08-0.12g of bentonite, 3-6g of polyethylene and 0.1-0.7g of modified zeolite powder;
(2) mixing nano silicon dioxide, perlite and bentonite, grinding, sieving by a 40-60-mesh sieve, adding glass fiber and water glass, and uniformly stirring to obtain a mixed material a;
(3) mixing and stirring the phosphogypsum powder and the polypropylene resin uniformly, performing ultraviolet irradiation treatment for 30-40min, adding polyethylene, and stirring uniformly to obtain a mixed material b;
(4) mixing the mixed material b with the modified zeolite powder, treating at 140 ℃ for 10-20s at the temperature of 120-;
the modified zeolite powder is prepared by heating zeolite to 180 ℃, watering and airing to form powder, adding urea accounting for 1% of the mass of the zeolite, and uniformly stirring.
2. The method for preparing the heat-insulating pipe as claimed in claim 1, wherein in the step (1), the raw materials comprise 0.2g of glass fiber, 0.02g of water glass, 0.5g of nano-silica, 2g of perlite, 6g of polypropylene resin, 0.2g of phosphogypsum powder, 0.1g of bentonite, 5g of polyethylene and 0.3g of modified zeolite powder.
3. The method for preparing the insulated pipe according to claim 1, wherein the salt bath of the vulcanizing tank adopts a sulfite solution and/or an ammonium sulfide solution.
4. The method of claim 3, wherein the sulfite solution is one of a potassium sulfite solution and a sodium sulfite solution.
5. The method for producing an incubator as recited in claim 3 or 4, wherein the molar concentration of the sulfite solution is 1.3 mol/L.
6. The method of claim 3, wherein the molar concentration of the ammonium sulfide solution is 1.5 mol/L.
7. The method of claim 3, wherein the salt, sulfite, and ammonium sulfide are mixed in a mass ratio of 1: 1.
8. The insulated pipe produced by the method according to any one of claims 1 to 7.
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| CN201711035308.XA CN107722454B (en) | 2017-10-30 | 2017-10-30 | Heat preservation pipe and preparation method thereof |
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| CN108948534A (en) * | 2018-07-26 | 2018-12-07 | 合肥帧讯低温科技有限公司 | Heat-preservation and heat-insulation water pipe material and preparation method thereof |
| CN109571845A (en) * | 2018-10-30 | 2019-04-05 | 中投（天津）热力股份有限公司 | A kind of resistance to compression, ageing-resistant insulating tube manufacturing process |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106117705A (en) * | 2016-06-24 | 2016-11-16 | 贵州德江韫韬科技有限责任公司 | A kind of insulating tube and preparation method thereof |
| CN106979387A (en) * | 2017-06-06 | 2017-07-25 | 肥西县碧涛建材有限公司 | A kind of insulating tube and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106117705A (en) * | 2016-06-24 | 2016-11-16 | 贵州德江韫韬科技有限责任公司 | A kind of insulating tube and preparation method thereof |
| CN106979387A (en) * | 2017-06-06 | 2017-07-25 | 肥西县碧涛建材有限公司 | A kind of insulating tube and preparation method thereof |
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Effective date of registration: 20220623 Address after: 061300 Puwa Industrial Park, Yanshan County, Cangzhou City, Hebei Province Patentee after: Cangzhou Huizhong pipeline Manufacturing Co.,Ltd. Address before: 550001 room 8, 14th floor, unit 3, group D Shopping Center (1), Guiyang Century City, guanshanhu District, Guiyang City, Guizhou Province Patentee before: GUIZHOU PAITN TECHNOLOGY SERVICE Co.,Ltd. |
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Address after: 061300 Puwa Industrial Park, Yanshan County, Cangzhou City, Hebei Province Patentee after: Hebei Huizhong Pipeline Manufacturing Group Co.,Ltd. Address before: 061300 Puwa Industrial Park, Yanshan County, Cangzhou City, Hebei Province Patentee before: Cangzhou Huizhong pipeline Manufacturing Co.,Ltd. |
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