CN111751240A - Device and method for testing thermal stability of organic heat carrier - Google Patents
Device and method for testing thermal stability of organic heat carrier Download PDFInfo
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- CN111751240A CN111751240A CN202010643738.5A CN202010643738A CN111751240A CN 111751240 A CN111751240 A CN 111751240A CN 202010643738 A CN202010643738 A CN 202010643738A CN 111751240 A CN111751240 A CN 111751240A
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- 238000012360 testing method Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims description 8
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 45
- 239000010935 stainless steel Substances 0.000 claims abstract description 45
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 23
- 238000007789 sealing Methods 0.000 claims abstract description 17
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 10
- 238000005303 weighing Methods 0.000 claims description 14
- 239000007789 gas Substances 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000000354 decomposition reaction Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 229910001873 dinitrogen Inorganic materials 0.000 claims 3
- 238000012827 research and development Methods 0.000 abstract description 14
- 238000002474 experimental method Methods 0.000 abstract description 9
- 239000002184 metal Substances 0.000 abstract description 3
- 238000011156 evaluation Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract 1
- 238000012546 transfer Methods 0.000 description 9
- 239000003921 oil Substances 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 238000013112 stability test Methods 0.000 description 4
- 238000012216 screening Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000000969 carrier Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012797 qualification Methods 0.000 description 2
- 238000002144 chemical decomposition reaction Methods 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000013529 heat transfer fluid Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000012946 outsourcing Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/26—Oils; Viscous liquids; Paints; Inks
- G01N33/28—Oils, i.e. hydrocarbon liquids
- G01N33/2805—Oils, i.e. hydrocarbon liquids investigating the resistance to heat or oxidation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/26—Oils; Viscous liquids; Paints; Inks
- G01N33/28—Oils, i.e. hydrocarbon liquids
- G01N33/2888—Lubricating oil characteristics, e.g. deterioration
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- Oil, Petroleum & Natural Gas (AREA)
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Abstract
The invention discloses a device for testing the thermal stability of an organic heat carrier, which comprises a stainless steel pressure-resistant hexagonal bottle, wherein a stainless steel bottle cap is arranged at the top of the stainless steel pressure-resistant hexagonal bottle, a stainless steel air duct is connected to the center of the stainless steel bottle cap, an external thread is arranged at the upper port of the air duct, the upper port of the air duct is connected with a laboratory nitrogen line, and a thread sealing cap connected with the external thread is arranged at the upper port of the air duct. Owing to adopted miniaturized metal mechanical seal device, a plurality of the device can be used in the single experiment, is guaranteeing to verify under the prerequisite that the data is effective, accurate, can effectively promote single organic heat carrier sample thermal stability evaluation experimental efficiency, improves product type experiment through rate by a wide margin, has practiced thrift a large amount of science and technology research and development expenses.
Description
Technical Field
The invention relates to a lubricating oil performance testing device, in particular to a device for testing the thermal stability of an organic heat carrier.
Background
The organic heat carrier is a generic term for organic substances used as heat transfer media, and includes all organic media for indirect heat transfer purposes, which are called heat transfer fluid, heat transfer oil, organic heat transfer media, heat media, and the like. The organic heat carrier in the heating system has the characteristics of uniform heating, accurate temperature regulation and control, capability of generating high temperature under low pressure, good heat transfer effect, energy conservation, convenient transportation and operation and the like. According to the regulation in GB 23971-2009 organic heat carrier standard, the product comprises three types of organic heat carriers, namely L-QB, L-QC and L-QD, is mainly suitable for various indirect heat transfer systems and is mainly used for boiler equipment.
The heating system needs to maintain a high temperature for a long time during the operation of the boiler equipment. High temperature can decompose and coke the organic heat carrier, the heating effect is uneven, the heat transfer efficiency of the boiler is reduced, equipment failure is caused, and even safety accidents occur. As the temperature rises, the organic heat carrier undergoes chemical reaction or molecular rearrangement, the generated gas-phase decomposition products, low-boiling-point substances, high-boiling-point substances and products which cannot be evaporated influence the service performance of the organic heat carrier, and the thermal stability is the capability of the organic heat carrier for resisting chemical decomposition at high temperature. Therefore, the organic heat carrier has good thermal stability, which is an important property for ensuring the safe operation and long service life of the equipment.
In the GB/T23800-2009 method for measuring the thermal stability of the organic heat carrier, after the organic heat carrier sample is heated for 720 hours or 1000 hours at the highest allowable use temperature (GB 24747-2009 safety technical conditions of the organic heat carrier), the thermal stability of the organic heat carrier sample is evaluated through changes of the appearance and the deterioration rate before and after the organic heat carrier experiment.
In the prior art, expensive detection equipment such as a gas chromatograph (meeting SH/T0558 + 1993 requirements), a bulb tube distiller, a simulated distiller and the like is required to be provided for investigating the thermal stability of the heat carrier, the experiment operation is complicated, and the research and development investment cost of products is high. Meanwhile, the organic heat carrier is mostly applied to special equipment, and products of the organic heat carrier can be sold in the market after being subjected to type test by Chinese special equipment testing research institute to obtain a type test qualification report. The period of the type experiment detection is slow, and the detection cost of a single sample is high. Based on the above reasons, how to investigate the thermal stability performance of the organic heat carrier in a large quantity, high efficiency and accurately in the research and development stage of the organic heat carrier product, thereby shortening the test period, optimizing the product scheme, ensuring the pass rate of the type test, improving the research and development efficiency of the organic heat carrier by enterprises, reducing the research and development cost of the product, accelerating the core of the conversion of the scientific research achievements, and solving the problem urgently needed by technical personnel in the field.
Disclosure of Invention
The invention mainly solves the technical problems in the prior art, and provides a device for testing the thermal stability of an organic heat carrier.
The technical problem of the invention is mainly solved by the following technical scheme:
the device for testing the thermal stability of the organic heat carrier is characterized by comprising a stainless steel pressure-resistant hexagonal bottle, wherein a stainless steel bottle cap is arranged at the top of the stainless steel pressure-resistant hexagonal bottle, a stainless steel air duct is connected to the central part of the stainless steel bottle cap, an outer wire is arranged at an upper port of the air duct, an upper port of the air duct is connected with a laboratory nitrogen line, and a thread sealing cap connected with the outer wire is arranged at an upper port of the air duct.
A method for testing the thermal stability of an organic thermal carrier by using the device for testing the thermal stability of an organic thermal carrier comprises the following steps:
s1, weighing the clean and dry stainless steel pressure-resistant hexagonal bottle to obtain a first mass m1To the nearest 0.1 mg;
s2, filling the organic heat carrier to be tested into the stainless steel pressure-resistant hexagonal bottle until the organic heat carrier is half of the volume of the stainless steel pressure-resistant hexagonal bottleWeighing the recorded weight to obtain a second mass m2To the nearest 0.1 mg;
s3, screwing a stainless steel cylinder cover to the mouth of the stainless steel pressure-resistant hexagonal bottle, connecting the upper port of the air duct with a nitrogen line of a laboratory, slowly opening nitrogen, and exhausting air in the rest space;
s4, screwing and sealing the outer thread of the upper port of the air duct and the thread sealing cap, and weighing to obtain a third mass m3To the nearest 0.1 mg;
s5, after the operations of nitrogen replacement, sealing and weighing are completed, heating the sealed stainless steel pressure-resistant hexagonal bottle with the cover in a muffle furnace test box at 310 ℃ for 720 h;
s6 and 720h, taking the sealed stainless steel pressure-resistant hexagonal bottle with the cover out of the high-temperature muffle furnace, naturally cooling to room temperature, putting the bottle into a low-temperature bath to reduce the internal pressure, carefully opening a threaded sealing cap at the upper end of the gas guide tube after 5-10 min, completely volatilizing the gas at room temperature, recovering to room temperature, removing attached condensed water, weighing the mass of the tester to obtain a fourth mass m4Accurate to 0.1mg, opening the stainless steel bottle cap, recording the appearance of the sample, and calculating the mass fraction of the gas-phase decomposition product
Because the miniaturized metal mechanical sealing device is adopted, N devices can be used at most in a single test (N depends on the hearth space of a muffle furnace), and the experimental efficiency of the thermal stability evaluation of the single organic heat carrier sample can be effectively improved on the premise that the test data is effective and accurate. The device is used for facilitating the determination of the organic heat carrier product scheme of an enterprise; the product type experiment passing rate is greatly improved, and a large amount of scientific and technological research and development expenses are saved; meanwhile, the research and development period is shortened, the scientific research result conversion rate of enterprises is effectively improved, and a technical equipment foundation is provided for the rapid result conversion of scientific and technological innovation of the enterprises and the grasp of market opportunities.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an apparatus for testing thermal stability of an organic heat carrier according to the present invention;
fig. 2 is a schematic structural connection diagram of the apparatus for testing thermal stability of an organic heat carrier in fig. 1.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the scope of the present invention will be more clearly and clearly defined.
As shown in fig. 1 and 2, the apparatus for testing the thermal stability of the organic heat carrier includes a stainless steel pressure-resistant hexagonal bottle 1, a stainless steel bottle cap 2 is disposed on the top of the stainless steel pressure-resistant hexagonal bottle 1, a stainless steel gas guide tube 3 is connected to the center of the stainless steel bottle cap 2, an outer thread 4 is disposed at an upper port of the gas guide tube 3, an upper port of the gas guide tube 3 is connected to a laboratory nitrogen line, and a screw sealing cap 5 connected to the outer thread 4 is disposed at an upper port of the gas guide tube 3.
The method for testing the thermal stability of the organic heat carrier comprises the following steps:
s1, weighing the clean and dry stainless steel pressure-resistant hexagonal bottle 1 to obtain a first mass m1To the nearest 0.1 mg;
s2, filling the organic heat carrier to be measured into the stainless steel pressure-resistant hexagonal bottle 1 to half of the volume of the stainless steel pressure-resistant hexagonal bottle 1, weighing and recording the weight to obtain a second mass m2To the nearest 0.1 mg;
s3, screwing the stainless steel bottle cap 2 to the mouth of the stainless steel pressure-resistant hexagonal bottle 1, connecting the upper port of the air duct 3 with a nitrogen line of a laboratory, slowly opening nitrogen, and exhausting air in the rest space;
s4, screwing and sealing the outer wire 4 at the upper port of the air duct 3 and the threaded sealing cap 5, and weighing to obtain a third mass m3To the nearest 0.1 mg;
s5, after the operations of nitrogen replacement, sealing and weighing are completed, heating the sealed stainless steel pressure-resistant hexagonal bottle 1 with the cover in a muffle furnace test box at 310 ℃ for 720 h;
s6 and 720h later, taking the sealed stainless steel pressure-resistant hexagonal bottle 1 with the cover out of the high-temperature muffle furnace, naturally cooling to room temperature, putting the bottle into a low-temperature bath to reduce the internal pressure, carefully opening the threaded sealing cap 5 at the upper end of the air guide tube after 5-10 min, completely volatilizing the gas at room temperature, recovering to room temperature, removing the attached condensed water, weighing the mass of the tester to obtain a fourth mass m4To the accuracy of 0.1mg, the stainless steel bottle cap 2 was opened, the appearance of the sample was recorded, and the mass fraction of the gas-phase decomposition product was calculated
Taking organic heat carriers L-QC310 and L-QD330 as examples, the thermal stability of oil products in different schemes is examined.
Taking L-QC310 heat transfer oil as an example, the scheme is an optimal product screening scheme. 5L-QC 310 organic heat carrier heat conducting oils prepared by different schemes are used for carrying out a thermal stability test. The procedure was followed and the data recorded as in Table 1
TABLE 1L-QC 310 protocol screening data for heat transfer oil products
From table 1, according to the test and detection scheme 5, the mass fraction of the gas-phase decomposition product is lowest, the color is lighter, no precipitated oil sludge is produced, and the scheme 5 is more suitable for producing the L-QC310 heat conduction oil product compared with other schemes.
Product schemes are respectively formulated according to the product performance requirements of the organic heat carrier L-QC310 and the L-QD 330. And the test scale is enlarged, the test efficiency and the type test qualification rate of the organic heat carrier after the device is used are tested, and the research and development cost is calculated.
Note: the research and development cost is the sum of the research and development investments such as instrument and equipment purchase, outsourcing analysis, organic heat carrier product scheme preparation, performance test and the like.
The embodiment shows that compared with the traditional organic heat carrier thermal stability test device, the traditional organic heat carrier thermal stability test device has the advantages of small quantity of single experimental samples, long research and development period, low passing rate of type experiments and high research and development cost. Especially for organic heat carrier products such as L-QD330, L-QD340, L-QD350 and the like, a large amount of time and cost are consumed in the process of evaluating and screening a product scheme, and the final type experiment passing rate is still low, so that the scientific and technological innovation and the product marketing of enterprises in the field are severely restricted.
In conclusion, compared with the prior art, the miniaturized metal mechanical seal testing device adopted by the invention can effectively improve the number of samples in a single experiment, has accurate and effective experimental data, and greatly ensures the success rate of the thermal stability test of the organic heat carrier product; the experimental efficiency is greatly improved, and a large amount of scientific and technological research and development expenses are saved; meanwhile, the research and development period is shortened, and the conversion rate of the scientific research achievements of enterprises is effectively improved.
Without being limited thereto, any changes or substitutions that are not thought of through the inventive work should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope defined by the claims.
Claims (2)
1. The utility model provides a device for testing organic heat carrier thermal stability, its characterized in that, a device for testing organic heat carrier thermal stability contain the withstand voltage hexagonal bottle of stainless steel (1), the top of the withstand voltage hexagonal bottle of stainless steel (1) be equipped with a stainless steel bottle lid (2), the central part of stainless steel bottle lid (2) be connected with a stainless steel air duct (3), the upper portion port of air duct (3) be equipped with outer silk (4), the upper portion port of air duct (3) be connected with laboratory nitrogen gas circuit, the upper portion port of air duct (3) be equipped with the thread sealing cap (5) that outer silk (4) are connected.
2. A method for testing the thermal stability of an organic heat carrier by using the apparatus for testing the thermal stability of an organic heat carrier as claimed in claim 1, comprising the steps of:
s1, weighing the clean and dry stainless steel pressure-resistant hexagonal bottle (1) to obtain a first mass m1To the nearest 0.1 mg;
s2, filling the organic heat carrier to be measured into the stainless steel pressure-resistant hexagonal bottle (1) to half of the volume of the stainless steel pressure-resistant hexagonal bottle (1), weighing and recording the weight to obtain a second mass m2To the nearest 0.1 mg;
s3, screwing a stainless steel bottle cap (2) to the mouth of the stainless steel pressure-resistant hexagonal bottle (1), connecting the upper port of the air duct (3) with a nitrogen gas circuit of a laboratory, slowly opening nitrogen gas, and exhausting air in the rest space;
s4, screwing and sealing the outer thread (4) of the upper port of the air duct (3) and the threaded sealing cap (5), and weighing to obtain a third mass m3To the nearest 0.1 mg;
s5, after the operations of nitrogen replacement, sealing and weighing are completed, heating the sealed stainless steel pressure-resistant hexagonal bottle (1) with the cover in a muffle furnace test box at 310 ℃ for 720 h;
s6 and 720h later, taking the sealed stainless steel pressure-resistant hexagonal bottle (1) with the cover out of the high-temperature muffle furnace, naturally cooling to room temperature, putting the stainless steel pressure-resistant hexagonal bottle into a low-temperature bath to reduce the internal pressure, carefully opening a threaded sealing cap (5) at the upper end of the air guide tube after 5-10 min, completely volatilizing the gas at room temperature, recovering to room temperature, removing the attached condensed water, weighing the mass of the tester to obtain a fourth mass m4To the accuracy of 0.1mg, the stainless steel bottle cap (2) is opened, the appearance of the sample is recorded, and the mass fraction of the gas phase decomposition product is calculated
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010643738.5A CN111751240A (en) | 2020-07-07 | 2020-07-07 | Device and method for testing thermal stability of organic heat carrier |
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| CN202010643738.5A CN111751240A (en) | 2020-07-07 | 2020-07-07 | Device and method for testing thermal stability of organic heat carrier |
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| CN111751240A true CN111751240A (en) | 2020-10-09 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203123939U (en) * | 2013-01-29 | 2013-08-14 | 天津大港油田滨港集团博弘石油化工有限公司 | High-temperature resistant and pressure resistant stainless steel bottle |
| CN104111265A (en) * | 2013-06-28 | 2014-10-22 | 成都迈斯拓新能源润滑材料有限公司 | Detection method for heat stability of organic heat carrier |
| CN110243857A (en) * | 2019-07-11 | 2019-09-17 | 中海油气(泰州)石化有限公司 | A kind of devices and methods therefor for test for freeze machine oil chemical stability |
-
2020
- 2020-07-07 CN CN202010643738.5A patent/CN111751240A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203123939U (en) * | 2013-01-29 | 2013-08-14 | 天津大港油田滨港集团博弘石油化工有限公司 | High-temperature resistant and pressure resistant stainless steel bottle |
| CN104111265A (en) * | 2013-06-28 | 2014-10-22 | 成都迈斯拓新能源润滑材料有限公司 | Detection method for heat stability of organic heat carrier |
| CN110243857A (en) * | 2019-07-11 | 2019-09-17 | 中海油气(泰州)石化有限公司 | A kind of devices and methods therefor for test for freeze machine oil chemical stability |
Non-Patent Citations (1)
| Title |
|---|
| 中华人民共和国国家质量监督检验检疫总局等: "《GB/T 有机热载体热稳定性测定法》", 18 May 2009 * |
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