CN113484102B - Petroleum refining gas sampler and sampling method of carbon fiber composite material - Google Patents
Petroleum refining gas sampler and sampling method of carbon fiber composite material Download PDFInfo
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- CN113484102B CN113484102B CN202110793725.0A CN202110793725A CN113484102B CN 113484102 B CN113484102 B CN 113484102B CN 202110793725 A CN202110793725 A CN 202110793725A CN 113484102 B CN113484102 B CN 113484102B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2247—Sampling from a flowing stream of gas
Abstract
The invention discloses a petroleum refining gas sampler made of carbon fiber composite material, which comprises an inner container and a fiber layer; the inner container is prepared from a polypropylene mixture after stress analysis, and the fiber layer is formed by winding a plurality of carbon fiber mixed filaments; the carbon fiber mixed filament is wound with the inner container through a bonding agent and is bonded and fixed; the invention also provides a sampling method of the petroleum refining gas sampler made of the carbon fiber composite material, which comprises the following steps: s1, loading a sampler and introducing petroleum refining gas; s2, controlling the pressure of the petroleum refining gas entering the sampler to form a closed sampler; s3, collecting the refining gas in the sampler; the invention has the beneficial effects that: the pressure of the wound liner is analyzed through stress analysis to obtain the size of the liner, the liner is prepared through a polypropylene mixture, and the liner and the carbon fiber mixed filament are bonded and fixed through a binder, so that the lightweight and safe sampling are realized.
Description
Technical Field
The invention relates to the technical field of petroleum refining gas sampling, in particular to a petroleum refining gas sampler made of a carbon fiber composite material and a sampling method.
Background
In petroleum processing, a large amount of combustible harmful gas can be generated, and in the production process of petrochemical enterprises, in order to ensure the quality of products, the samples are periodically sampled at a pipeline condensation discharge position, so that overdue samples with more deposits at a pipeline sampling port are deposited, and a sampling result is greatly different from real product samples.
Present gas sampling adopts the sample steel bottle mostly, because sample steel bottle self is heavier, in addition gaseous weight to online sampling off-line analysis, the sampling point is many, leads to sample stage task heavy, in addition contains a small amount of chlorine in the impurity of refinery gas, corrodes the steel easily, thereby leads to the equipment to damage.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a petroleum refining gas sampler and a sampling method of a carbon fiber composite material, so as to at least achieve the aim of light weight and safe sampling
The purpose of the invention is realized by the following technical scheme:
a petroleum refining gas sampler made of carbon fiber composite materials comprises an inner container and a fiber layer wound on the outer wall of the inner container; the liner is prepared from a polypropylene mixture after stress analysis; the fiber layer is formed by winding a plurality of carbon fiber mixed filaments; the carbon fiber mixed filament is wound with the inner container through the adhesive and is adhered and fixed.
Preferably, the stress analysis is winding stress analysis by using ANSYS software, and the method comprises the following specific steps:
s1, inputting model data into software to form a three-dimensional mold;
s2, winding the carbon fiber mixed filament on the formed three-dimensional die by using the mechanical property of the carbon fiber mixed filament as a reference under different pressures to form a fiber layer, analyzing stress distribution on the liner, and determining a stress action area;
s3, gradually increasing the pressure of the liner in the determined stress acting area, observing the stress distribution conditions of the fiber layers wound at different pressures, and determining the maximum acting stress and the winding pressure;
s4, determining the specific size of the three-dimensional die under the condition of the determined maximum acting stress and the determined winding pressure, namely analyzing the stress; the polypropylene mixture comprises 35-40 parts by mass of polypropylene, 15-20 parts by mass of ethyl acetate, 10-20 parts by mass of methylpentene polymer and 2-8 parts by mass of phthalate; according to the size data after stress analysis, firstly, the polypropylene, the methylpentene polymer and the phthalate are melted into liquid, then ethyl acetate is introduced, and then the liner is obtained after the mould size designed in the stress analysis is reversed, cooled and formed.
Preferably, the adhesive comprises 35-50 parts by mass of cyanoacrylate-polyethylene glycol copolymer powder and 15-25 parts by mass of epoxy resin.
Preferably, the carbon fiber mixed filament comprises 40-50 parts by mass of carbon fiber, 15-25 parts by mass of polyamino bismaleimide and 20-30 parts by mass of epoxy resin; the specific process of winding, bonding and fixing is that the carbon fiber mixed filament is wound on the inner container at an inclination angle of 15 degrees and an interval of 2mm, after the winding is finished, the inner container is heated until the surface layer is hot-melted, the wound inner container is soaked in hot-melt liquid of the bonding agent, and then the inner container is cooled, solidified and molded to obtain the sampler.
The invention also provides a sampling method of the petroleum refining gas sampler made of the carbon fiber composite material, which comprises the following steps:
s1, loading the obtained sampler into a sampling system, arranging three layers according to 10 samplers in each layer, and introducing petroleum refining gas into the samplers;
s2, controlling the pressure of the petroleum refining gas entering the sampler, and closing the inlet and outlet ends of the sampler to form a closed state after the pressure reaches a limited pressure;
s3, taking down the sealed sampler, standing, opening a sampling port of the sampler, and collecting the refined gas in the sampler, namely the sampling method.
The beneficial effects of the invention are:
the method comprises the steps of analyzing the pressure of a wound liner by stress analysis to obtain the size of the liner, preparing the liner by using a polypropylene mixture, using the polypropylene mixture comprising polypropylene, ethyl acetate, methyl pentene polymer and phthalate, using polypropylene as a framework, assisting ethyl acetate in dispersing and uniformly mixing, using the methyl pentene polymer as a hardening agent to enhance the integral hardness, plasticizing the phthalate to quickly form a fixed liner, using a carbon fiber mixed filament comprising carbon fibers, polyamino bismaleimide and epoxy resin, using the carbon fibers as the framework, then assisting polyamino bismaleimide in extending, finally using the epoxy resin to perform integral fixation of the carbon fiber mixed filament, finally bonding and fixing the liner and the carbon fiber mixed filament by using a bonding agent comprising cyanoacrylate-polyethylene glycol copolymer powder and the epoxy resin, thereby using the acrylate-polyethylene glycol copolymer of the bonding agent to bond and fix the carbon fiber mixed filament and the liner by using the epoxy resin, further using various organic polymers to achieve the purpose of light weight and further reflect the purpose of safe sampling.
Detailed Description
The technical solutions of the present invention are described in further detail below, but the scope of the present invention is not limited to the following.
A petroleum refining gas sampler made of carbon fiber composite materials comprises an inner container and a fiber layer wound on the outer wall of the inner container; the liner is prepared from a polypropylene mixture after stress analysis; the fiber layer is formed by winding a plurality of carbon fiber mixed filaments; the carbon fiber mixed filament is wound with the inner container through the adhesive and is adhered and fixed.
The stress analysis is to adopt ANSYS software to carry out winding stress analysis, and comprises the following specific steps:
s1, inputting model data into software to form a three-dimensional mold;
s2, winding the carbon fiber mixed filament on the formed three-dimensional die at different pressures of 0-2kPa by taking the mechanical property of the carbon fiber mixed filament as a reference to form a fiber layer, analyzing the stress distribution on the liner, and determining a stress action area;
s3, on the determined stress acting area, gradually increasing the pressure of the inner container to 8MPa, observing the stress distribution condition of fiber layers wound at different pressures, and determining that the maximum acting stress and the winding pressure are respectively 5MPa and 1.5kPa;
s4, under the condition of the determined maximum acting stress and the determined winding pressure, determining the specific size of the three-dimensional die as follows: the inner diameter of the liner is 29mm, the outer diameter of the liner is 30mm, the inner diameter of the inlet and the outlet of the liner is 14mm, the outer diameter of the sampling port of the liner is 15mm, and the pressure of the outer wall of the sampler is 3MPa, namely the stress analysis;
example 1
In order to further realize the purpose of light weight, the polypropylene mixture comprises 35-40 parts by mass of polypropylene, 15-20 parts by mass of ethyl acetate, 10-20 parts by mass of methylpentene polymer and 2-8 parts by mass of phthalate; according to the size data after stress analysis, firstly, the polypropylene, the methylpentene polymer and the phthalate are melted into liquid, then ethyl acetate is introduced, and then the liner is obtained after the mould size designed in the stress analysis is reversed, cooled and formed.
The adhesive comprises 35-50 parts by mass of cyanoacrylate-polyethylene glycol copolymer powder and 15-25 parts by mass of epoxy resin.
The carbon fiber mixed filament comprises 40-50 parts by mass of carbon fibers, 15-25 parts by mass of polyamino bismaleimide and 20-30 parts by mass of epoxy resin; the specific process of winding, bonding and fixing is that carbon fiber mixed filament is wound on the inner container at an inclination angle of 15 degrees and an interval of 2mm, after the winding is finished, the inner container is heated until the surface layer is hot-melted, the wound inner container is soaked in hot-melt liquid of the bonding agent, and then the inner container is cooled, solidified and molded to obtain the sampler.
Example 2
The polypropylene mixture adopts 35-40 parts of polypropylene, 15-20 parts of ethyl acetate, 10-20 parts of methylpentene polymer and 2-8 parts of phthalate by mass; the adhesive is prepared from 35-50 parts by mass of cyanoacrylate-polyethylene glycol copolymer powder and 15-25 parts by mass of epoxy resin, the carbon fiber mixed filament is prepared from 40-50 parts by mass of carbon fiber, 15-25 parts by mass of polyamino bismaleimide and 20-30 parts by mass of epoxy resin, and the rest steps and the formula are the same as those in example 1.
Example 3
The polypropylene mixture adopts 35 to 40 parts by mass of polypropylene, 15 to 20 parts by mass of ethyl acetate, 10 to 20 parts by mass of methylpentene polymer and 2 to 8 parts by mass of phthalic acid ester; the adhesive is prepared from 35-50 parts by mass of cyanoacrylate-polyethylene glycol copolymer powder and 15-25 parts by mass of epoxy resin, the carbon fiber mixed filament is prepared from 40-50 parts by mass of carbon fiber, 15-25 parts by mass of polyamino bismaleimide and 20-30 parts by mass of epoxy resin, and the rest steps and the formula are the same as those in example 1.
The samples obtained in each set of examples were collected and placed under a high-pressure push plate at a pressure of 0 to 5MPa and pressed, and pressure indications of crushing of the inner container of the sample were recorded, and the crushing pressure of the sample obtained in example 1 was 3.8MPa and the weight was 120g, while the crushing pressure of the sample obtained in example 2 was 3.6MPa and the weight was 118g, and the crushing pressure of the sample obtained in example 3 was 3.4MPa and the weight was 130g.
The invention also provides a sampling method of the petroleum refining gas sampler made of the carbon fiber composite material, which comprises the following steps:
s1, loading the obtained sampler into a sampling system, arranging three layers according to 10 samplers on each layer, and introducing petroleum refining gas into the sampler;
s2, controlling the pressure of the petroleum refining gas entering the sampler, and closing the inlet and outlet ends of the sampler to form a seal after the pressure reaches a limited pressure;
s3, taking down the sealed sampler, standing, opening a sampling port of the sampler, and collecting the refined gas in the sampler, namely the sampling method.
To conventional steel bottle sampler, although the high pressure environment that the pressure of the steel bottle sampler of same volume can reach 5MPa, but because its weight has reached 2kg weight, and the inner bag of this application does not have the detention effect in the steel bottle to organic gas, probably because there are a plurality of organic components in the inner bag material, but according to the step in preparation stage, the mixed long filament of carbon fiber can leak to in the inner bag material, consequently destroyed partial polar structure, lead to organic gas can't be detained, thereby directly spill out in the sample stage, thereby do not have the detention effect.
The foregoing is illustrative of the preferred embodiments of this invention, and it is to be understood that the invention is not limited to the precise form disclosed herein and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the concept as disclosed herein, either as described above or as apparent to those skilled in the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (5)
1. A carbon-fibre composite's oil refining gas sampler which characterized in that: comprises an inner container and a fiber layer wound on the outer wall of the inner container; the liner is prepared from a polypropylene mixture after stress analysis; the fiber layer is formed by winding a plurality of carbon fiber mixed filaments; the carbon fiber mixed filament is wound with the inner container through a bonding agent and is bonded and fixed;
the polypropylene mixture comprises 35-40 parts by mass of polypropylene, 15-20 parts by mass of ethyl acetate, 10-20 parts by mass of methylpentene polymer and 2-8 parts by mass of phthalate;
the adhesive comprises 35-50 parts by mass of cyanoacrylate-polyethylene glycol copolymer powder and 15-25 parts by mass of epoxy resin;
the carbon fiber mixed filament comprises 40-50 parts by mass of carbon fibers, 15-25 parts by mass of polyamino bismaleimide and 20-30 parts by mass of epoxy resin.
2. A carbon fiber composite petroleum refining gas sampler according to claim 1, characterized in that: the stress analysis is to adopt ANSYS software to carry out winding stress analysis, and comprises the following specific steps:
s1, inputting model data into software to form a three-dimensional mold;
s2, winding the carbon fiber mixed filament on the formed three-dimensional die by using the mechanical property of the carbon fiber mixed filament as a reference under different pressures to form a fiber layer, analyzing stress distribution on the liner, and determining a stress action area;
s3, on the determined stress action area, gradually increasing the pressure of the inner container, observing the stress distribution condition of the fiber layers wound at different pressures, and determining the maximum action stress and the winding pressure;
and S4, determining the specific size of the three-dimensional die under the condition of the determined maximum acting stress and the determined winding pressure, namely analyzing the stress.
3. A carbon fiber composite petroleum refining gas sampler according to claim 1, characterized in that: according to the size data after stress analysis, firstly, the polypropylene, the methylpentene polymer and the phthalate are melted into liquid, then ethyl acetate is introduced, and then the liner is obtained after the mould size designed in the stress analysis is reversed, cooled and formed.
4. A carbon fiber composite petroleum refining gas sampler according to claim 1, characterized in that: the specific process of winding, bonding and fixing is that the carbon fiber mixed filament is wound on the inner container at an inclination angle of 15 degrees and an interval of 2mm, after the winding is finished, the inner container is heated until the surface layer is hot-melted, the wound inner container is soaked in hot-melt liquid of the bonding agent, and then the inner container is cooled, solidified and molded to obtain the sampler.
5. The sampling method of a sampler for petroleum refining gas of carbon fiber composite material according to any one of claims 1 to 4, characterized in that: the method comprises the following steps:
s1, loading the obtained sampler into a sampling system, arranging three layers according to 10 samplers in each layer, and introducing petroleum refining gas into the samplers;
s2, controlling the pressure of the petroleum refining gas entering the sampler, and closing the inlet and outlet ends of the sampler to form a seal after the pressure reaches a limited pressure;
s3, taking down the sealed sampler, standing, opening a sampling port of the sampler, and collecting the refined gas in the sampler, namely the sampling method.
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