CN113484102B - Petroleum refining gas sampler and sampling method of carbon fiber composite material - Google Patents

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

Petroleum refining gas sampler and sampling method of carbon fiber composite material

technical field

The invention relates to the technical field of petroleum refining gas sampling, in particular to a carbon fiber composite material petroleum refining gas sampler and a sampling method.

Background technique

In petroleum processing, a large amount of flammable and harmful gases will be produced. In order to ensure the quality of products in the production process of petrochemical enterprises, samples need to be sampled regularly at the condensate drainage point of the pipeline, which causes more expired samples to be deposited at the sampling port of the pipeline. , leading to a large difference between the sampling results and the real product samples, and in order to obtain accurate sampling data in the actual sampling process, petrochemical companies often need to discharge a large amount of materials at the sampling port to obtain real and reliable samples, resulting in a large amount of raw materials At the same time, because the material samples of petrochemical enterprises are generally volatile, highly corrosive, toxic and harmful, they are very easy to pollute the environment and cause harm to the human body.

Most of the existing gas sampling uses sampling steel cylinders. Due to the heavy weight of the sampling steel cylinders, coupled with the weight of the gas, and online sampling and offline analysis, there are many sampling points, which leads to heavy tasks in the sampling stage. In addition, impurities in the refining gas contain A small amount of chlorine gas is easy to corrode steel and cause equipment damage.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies of the prior art, to provide a carbon fiber composite petroleum refining gas sampler and sampling method, to at least achieve the purpose of light weight and safe sampling

The purpose of the present invention is achieved through the following technical solutions:

A petroleum refining gas sampler made of carbon fiber composite material, including an inner tank and a fiber layer wound on the outer wall of the inner tank; the inner tank is prepared from a polypropylene mixture after stress analysis; the fiber layer is passed through It is formed by winding a plurality of carbon fiber mixed filaments; the carbon fiber mixed filaments are wound and bonded to the inner liner through a binder.

Preferably, described stress analysis is, adopts ANSYS software to carry out winding stress analysis, and concrete steps are:

S1 Input the model data into the software to form a three-dimensional mold;

S2 On the formed three-dimensional mold, taking the mechanical properties of the carbon fiber mixed filament as a reference, wind it with different pressures to form a fiber layer, analyze the force distribution on the inner tank, and determine the stress action area;

S3 In the area where the determined stress acts, gradually increase the pressure of the inner tank, observe the stress distribution of the fiber layer wound under different pressures, and determine the maximum acting stress and winding pressure;

S4 Under the condition of the determined maximum acting stress and winding pressure, determine the specific size of the three-dimensional mold, which is the stress analysis; the polypropylene mixture includes 35-40 parts by mass of polypropylene, 15- 20 parts of ethyl acetate, 10-20 parts of methylpentene polymer and 2-8 parts of phthalate; the process of preparing the inner tank from the polypropylene mixture is, according to the size after stress analysis According to the data, polypropylene, methylpentene polymer and phthalate are melted into a liquid first, then ethyl acetate is introduced, and then the mold size designed in the stress analysis is passed, and after the mold is cooled and formed, that is Get said liner.

Preferably, the binder includes 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 of polyaminobismaleimide and 20-30 parts of epoxy resin; the winding and bonding The specific process of fixation is to wind the carbon fiber mixed filament on the liner with an inclination angle of 15° and a spacing of 2mm. After the winding is completed, heat the surface layer to melt and soak the wrapped liner with the hot melt of the adhesive. Then cooled and solidified to obtain the sampler.

The present invention also provides a sampling method of a carbon fiber composite petroleum refining gas sampler, comprising the following steps:

S1 Load the obtained samplers into the sampling system, set up three layers with 10 samplers per layer, and pass the petroleum refining gas into the samplers;

S2 controls the pressure of the petroleum refining gas entering the sampler. When the pressure reaches the limit, close the inlet and outlet ports of the sampler to form an airtight seal;

S3 Take off the sealed sampler, and after standing still, open the sampling port of the sampler to collect the refinery gas in the sampler, which is the sampling method.

The beneficial effects of the present invention are:

Through stress analysis first, the pressure of winding the liner is analyzed to obtain the size of the liner, and then the liner is prepared through a polypropylene mixture, including polypropylene, ethyl acetate, methylpentene polymer and phthalate The polypropylene mixture, using polypropylene as the skeleton, and then assisting ethyl acetate to disperse and mix, using methylpentene polymer as a hardener to enhance the overall hardness, and then through the plasticization of phthalate, quickly form a fixed internal Bile, and then use carbon fiber mixed filaments including carbon fiber, polyaminobismaleimide and epoxy resin, use carbon fiber as the skeleton, supplemented by polyaminobismaleamide extension, and finally use epoxy resin for carbon fiber mixed filament The whole body is fixed, and finally the inner liner and the carbon fiber mixed filament are bonded and fixed by an adhesive including cyanoacrylate-polyethylene glycol copolymer powder and epoxy resin, so that the base acrylate-polyethylene glycol of the adhesive is used. The glycol copolymer uses epoxy resin to bond and fix the carbon fiber mixed filaments and the inner tank, and then uses a variety of organic polymers to achieve the purpose of weight reduction and at the same time reflect the purpose of safe sampling.

detailed description

The technical solution of the present invention is further described in detail below, but the protection scope of the present invention is not limited to the following description.

A petroleum refining gas sampler made of carbon fiber composite material, including an inner tank and a fiber layer wound on the outer wall of the inner tank; the inner tank is prepared from a polypropylene mixture after stress analysis; the fiber layer is passed through It is formed by winding a plurality of carbon fiber mixed filaments; the carbon fiber mixed filaments are wound and bonded to the inner liner through a binder.

Described stress analysis is, adopts ANSYS software to carry out winding stress analysis, and specific steps are:

S1 Input the model data into the software to form a three-dimensional mold;

S2 On the formed three-dimensional mold, taking the mechanical properties of the carbon fiber mixed filament as a reference, wind it with different pressures of 0-2kPa to form a fiber layer, analyze the force distribution on the inner tank, and determine the stress action area;

S3 In the area where the determined stress acts, gradually increase the pressure of the inner tank to 8MPa, observe the stress distribution of the fiber layer wound under different pressures, and determine that the maximum acting stress and the winding pressure are 5Mpa and 1.5kPa respectively;

S4 In the case of the determined maximum acting stress and winding pressure, determine the specific dimensions of the three-dimensional mold: the inner diameter of the inner tank is 29mm, the outer diameter is 30mm, the inner diameter of the inlet and outlet of the inner tank is 14mm, the outer diameter of the sampling port of the inner tank is 15mm, and the pressure on the outer wall of the sampler is 3Mpa , which is the stress analysis mentioned above;

Example 1

In order to further achieve the purpose of lightweighting, the polypropylene mixture includes 35-40 parts by mass of polypropylene, 15-20 parts of ethyl acetate, 10-20 parts of methylpentene polymer and 2- 8 parts of phthalates; the process of preparing the liner from the polypropylene mixture is, according to the size data after the stress analysis, first heat the polypropylene, methylpentene polymer and phthalates After the liquid is melted, ethyl acetate is added, and the mold size designed in the stress analysis is passed, and the mold is cooled and formed to obtain the inner tank.

The binder includes 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 includes 40-50 parts by mass of carbon fiber, 15-25 parts of polyaminobismaleimide and 20-30 parts of epoxy resin; The process is to wind the carbon fiber mixed filament on the inner tank at an inclination angle of 15° and a pitch of 2 mm. After the winding is completed, heat the surface layer to melt, soak the wound inner tank with the hot melt of the adhesive, and then cool and solidify. Molding, promptly obtains described sampler.

Example 2

The polypropylene mixture is made of 35-40 parts by mass of polypropylene, 15-20 parts of ethyl acetate, 10-20 parts of methylpentene polymer and 2-8 parts of phthalo acid ester; the binder is 35-50 parts by mass of cyanoacrylate-polyethylene glycol copolymer powder and 15-25 parts of epoxy resin, and the carbon fiber mixed filament 40-50 parts by mass of carbon fiber, 15-25 parts of polyaminobismaleimide and 20-30 parts of epoxy resin are used, and the rest of the steps and formula are the same as in Example 1.

Example 3

The polypropylene mixture is made of 35-40 parts by mass of polypropylene, 15-20 parts of ethyl acetate, 10-20 parts of methylpentene polymer and 2-8 parts of phthalo acid ester; the binder is 35-50 parts by mass of cyanoacrylate-polyethylene glycol copolymer powder and 15-25 parts of epoxy resin, and the carbon fiber mixed filament 40-50 parts by mass of carbon fiber, 15-25 parts of polyaminobismaleimide and 20-30 parts of epoxy resin are used, and the rest of the steps and formula are the same as in Example 1.

Collect the obtained sampler of each group of embodiments, and place pressure and squeeze under the high-pressure push plate of 0-5MPa, record the pressure reading when the inner bag of sampler is broken, the crushing pressure of the sampler obtained in embodiment 1 Be 3.8MPa, weight is 120g, and the crushing pressure of the sampler obtained in embodiment 2 is 3.6MPa, weight is 118g The crushing pressure of the sampler obtained in embodiment 3 is 3.4MPa, weight is 130g.

The present invention also provides a sampling method of a carbon fiber composite petroleum refining gas sampler, comprising the following steps:

S1 Load the obtained samplers into the sampling system, set up three layers with 10 samplers per layer, and pass the petroleum refining gas into the samplers;

S2 controls the pressure of the petroleum refining gas entering the sampler. When the pressure reaches the limit, close the inlet and outlet ports of the sampler to form an airtight seal;

S3 Take off the sealed sampler, and after standing still, open the sampling port of the sampler to collect the refinery gas in the sampler, which is the sampling method.

For the conventional steel cylinder sampler, although the pressure of the same volume steel cylinder sampler can reach the high-pressure environment of 5MPa, but because its weight has reached 2kg, and the liner of the present application has no stagnation effect in the steel cylinder for organic gases, The possible reason is that although there are many organic components in the inner tank material, according to the steps in the preparation stage, the carbon fiber mixed filament will leak into the inner tank material, thus destroying part of the polar structure, resulting in the inability of the organic gas to stay, thus Spills directly during the sampling phase, so there is no hold-up effect.

The above descriptions are only preferred embodiments of the present invention, and it should be understood that the present invention is not limited to the forms disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and Modifications can be made within the scope of the ideas described herein, by virtue of the above teachings or skill or knowledge in the relevant art. However, changes and changes made by those skilled in the art do not depart from the spirit and scope of the present invention, and should all be within the protection scope of the appended claims of the present invention.

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.