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CN114414415A - A kind of measuring method of fluidized catalyst wear rate - Google Patents

A kind of measuring method of fluidized catalyst wear rate Download PDF

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CN114414415A
CN114414415A CN202210054393.9A CN202210054393A CN114414415A CN 114414415 A CN114414415 A CN 114414415A CN 202210054393 A CN202210054393 A CN 202210054393A CN 114414415 A CN114414415 A CN 114414415A
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particle size
particles
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catalyst
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CN114414415B (en
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苗洋
黄志伟
高峰
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Taiyuan University of Technology
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    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
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Abstract

The invention provides a method for measuring the wear rate of a fluidized catalyst, which comprises the steps of measuring the particle size distribution of solid catalyst particles which do not participate in aromatization, weighing the mass of the particles under different particle sizes, determining the mass of the particles with the particle sizes of 120 mu m and below 75 mu m, the mass of the remaining particles and the mass of the overflowing particles are measured again after the catalyst participates in the reaction, and since the particles of more than 120 μm have the best wear resistance, while particles below 75 μm are most susceptible to attrition, particles below 30 μm are essentially not attrited, the probability of abrasion occurrence is roughly estimated and the particle size distribution of abraded particles is predicted on the basis of combining the mass relation before reaction, the abrasion rate change possibly caused by non-uniform particle size distribution is overcome, the difficulty of abrasion rate determination is reduced, the repeatability of the determination result is strong, and the prediction result is visual and reliable.

Description

一种流态化催化剂磨损率的测定方法A kind of measuring method of fluidized catalyst wear rate

技术领域technical field

本发明涉及流态化催化剂磨损率的测定领域，具体而言，涉及一种流态化催化剂磨损率的测定方法。The invention relates to the field of measuring the wear rate of fluidized catalysts, in particular to a method for measuring the wear rate of fluidized catalysts.

背景技术Background technique

近年来，随着流态化技术的发展，流化床越来越多地应用于多种生产领域中。然而在流化床中，固体颗粒由于受到流化气体的吹蚀，以及与其他颗粒或反应器壁发生碰撞等作用而发生磨损，从而造成严重的后果；粒径与磨损率的关联研究结果表明，颗粒在稳态阶段的磨损程度，总体上随着粒径的增大而逐渐减小；在流化床中的颗粒磨损测定问题上，国内外并未达成统一行业标准，通过比较各粒径范围的颗粒的磨损程度，得出具有最佳抗磨损性能的粒径范围为120-160和160-200微米。In recent years, with the development of fluidization technology, fluidized beds are increasingly used in various production fields. However, in the fluidized bed, the solid particles are worn due to the erosion of the fluidized gas and the collision with other particles or the reactor wall, which will cause serious consequences; the results of the correlation study between particle size and wear rate show that , the wear degree of particles in the steady state generally gradually decreases with the increase of particle size; on the measurement of particle wear in the fluidized bed, no unified industry standard has been reached at home and abroad. Abrasion degree of the particles in the range, yielding the particle size range of 120-160 and 160-200 microns with the best anti-wear properties.

因此我们对此做出改进，提出一种流态化催化剂磨损率的测定方法，有助于更准确的计算出催化剂的磨损率,提高反应速率，在工业化生产中取得更大的经济效益。Therefore, we made improvements to this and proposed a method for measuring the wear rate of fluidized catalysts, which is helpful to more accurately calculate the wear rate of catalysts, improve the reaction rate, and achieve greater economic benefits in industrial production.

发明内容SUMMARY OF THE INVENTION

本发明的目的在于：针对目前存在的背景技术提出的问题，为了实现上述发明目的，本发明提供了以下技术方案：一种流态化催化剂磨损率的测定方法，包括以下步骤：S1、对催化剂颗粒粒径进行测量，得到催化剂颗粒粒度分布；S11、将所述催化剂颗粒筛分成多个粒径范围，对不同粒径范围的粉体质量进行测量；S12、将所述催化剂颗粒不同粒径范围的粉体质量与颗粒总质量作比，得到质量分布；S13、建立线性关系；S2、在催化剂参与芳构化反应后重新测量剩余颗粒质量与溢出质量，结合磨损发生前的质量分数估计出反应中发生磨损的颗粒质量；S21、根据磨损发生的时间和磨损前的粒径分布估计出磨损后的粒径分布；S3、评价固相催化剂的磨损性能，分析所述催化剂样品参与反应后的粒度分布，并计算不同粒度下颗粒质量的比值；S31分析催化剂样品磨损前后的粒径分布,以催化剂样品磨损前后催化剂颗粒粒径之比表示磨损程度并判断催化剂的抗磨损能力。The purpose of the present invention is: in view of the problems raised by the existing background technology, in order to achieve the above-mentioned purpose of the invention, the present invention provides the following technical solutions: a method for measuring the wear rate of a fluidized catalyst, comprising the following steps: S1, to the catalyst Measure the particle size to obtain the particle size distribution of the catalyst particles; S11, sieve the catalyst particles into a plurality of particle size ranges, and measure the powder quality of the different particle size ranges; S12, classify the catalyst particles with different particle size ranges The mass of the powder is compared with the total mass of the particles to obtain the mass distribution; S13, establish a linear relationship; S2, re-measure the mass of the remaining particles and the overflow mass after the catalyst participates in the aromatization reaction, and estimate the reaction based on the mass fraction before the attrition occurs. S21, estimate the particle size distribution after abrasion according to the time of abrasion and the particle size distribution before abrasion; S3, evaluate the abrasion performance of the solid-phase catalyst, and analyze the particle size of the catalyst sample after participating in the reaction S31 analyzes the particle size distribution of the catalyst samples before and after wear, and uses the ratio of the particle diameters of the catalyst samples before and after wear to indicate the degree of wear and to judge the anti-wear ability of the catalyst.

作为本申请优选的技术方案，所述S1中粒径分布以△D为间隔将颗粒按直径的大小划分为多个粒径区间，第i个区间内颗粒的平均粒径记做Di，则通过如下积分形式计算颗粒粒径分布公式为：As a preferred technical solution of the present application, the particle size distribution in S1 divides the particles into multiple particle size intervals according to the diameter with ΔD as the interval, and the average particle size of the particles in the i-th interval is recorded as D i , then The formula for calculating the particle size distribution by the following integral form is:

Figure BDA0003475828920000021
Figure BDA0003475828920000021

其中，Di第i个区间内颗粒的平均粒径。Among them, D i is the average particle size of the particles in the ith interval.

作为本申请优选的技术方案，所述S12催化剂粒子均为球形且密度均一，单个催化剂颗粒的质量公式为：As a preferred technical solution of the present application, the S12 catalyst particles are spherical and uniform in density, and the mass formula of a single catalyst particle is:

Figure BDA0003475828920000022
Figure BDA0003475828920000022

其中ρ为密度，D为颗粒的平均粒径。where ρ is the density and D is the average particle size of the particles.

作为本申请优选的技术方案，所述S12中粉体质量与颗粒总质量作比公式为：

Figure BDA0003475828920000023
其中Mi为实验前筛分出来的某个粒径范围内的颗粒质量，M0为实验开始时加入的样品颗粒的总质量。As a preferred technical solution of the present application, the formula for the ratio of the powder mass to the total particle mass in the S12 is:
Figure BDA0003475828920000023
where Mi is the mass of particles within a certain particle size range sieved before the experiment, and M 0 is the total mass of the sample particles added at the beginning of the experiment.

作为本申请优选的技术方案，所述S13中建立线性关系中粒径分布与质量分数之间的线性关系公式为Pi＝R(D)3，其中R(D)颗粒粒径分布数值。As a preferred technical solution of the present application, the linear relationship formula between particle size distribution and mass fraction in establishing the linear relationship in S13 is Pi=R(D)3, where R(D) is the particle size distribution value.

作为本申请优选的技术方案，所述S2中由于颗粒粒径与发生磨损的概率呈正态分布，则发生磨损的概率密度为：As a preferred technical solution of the present application, in the S2, since the particle size and the probability of wear are normally distributed, the probability density of wear is:

Figure BDA0003475828920000031
Figure BDA0003475828920000031

则磨损消耗的颗粒质量为:Then the mass of particles consumed by wear is:

M＝M0-M1+M2 M=M 0 -M 1 +M 2

其中剩余颗粒质量M1,溢出颗粒质量M2 The remaining particle mass M 1 , the overflow particle mass M 2

根据粒径分布得到不同粒径颗粒磨损的质量为：According to the particle size distribution, the wear quality of particles with different particle sizes is obtained as:

Mx＝M·∫f(lnx)dxM x =M·∫f(lnx)dx

其中f(Inx)为发生磨损的概率密度，M为颗粒质量。where f(Inx) is the probability density of wear and M is the particle mass.

作为本申请优选的技术方案，磨损后的颗粒粒径分布As a preferred technical solution of the present application, the particle size distribution after abrasion

Figure BDA0003475828920000032
Figure BDA0003475828920000032

其中R颗粒粒径分布数值。where R is the numerical value of particle size distribution.

作为本申请优选的技术方案，所述S3由于粒径分布与耐磨度呈现正态分布关系，因此只要判断磨损前的粒径分布是否集中在75μm附近，粒径分布越接近75μm则耐磨性越差，同时通过磨损前后不同粒度颗粒的质量表征颗粒的磨损度：As a preferred technical solution of the present application, since the particle size distribution of S3 exhibits a normal distribution relationship with the wear resistance, it is only necessary to judge whether the particle size distribution before wear is concentrated around 75 μm, and the closer the particle size distribution is to 75 μm, the better the wear resistance. The worse, at the same time, the wear degree of particles is characterized by the quality of particles with different particle sizes before and after wear:

Figure BDA0003475828920000033
Figure BDA0003475828920000033

比值越趋近1则磨损度越低。The closer the ratio is to 1, the lower the degree of wear.

作为本申请优选的技术方案，所述S31磨损程度为R(D)为催化剂颗粒磨损前的粒径分布，Rx(D)为磨损后的颗粒粒径分布As a preferred technical solution of the present application, the wear degree of S31 is that R(D) is the particle size distribution of the catalyst particles before the wear, and R x (D) is the particle size distribution after the wear

磨损程度表示为：The degree of wear is expressed as:

Figure BDA0003475828920000041
Figure BDA0003475828920000041

通过两条粒径分布曲线的拟合程度判断颗粒抗磨损能力，抗磨损能力越高，拟合程度也越高。The anti-wear ability of the particles is judged by the fitting degree of the two particle size distribution curves. The higher the anti-wear ability, the higher the fitting degree.

作为本申请优选的技术方案，所述S1中将催化剂粒度分布结合该粒度下的质量百分比能准确地估计出参与反应后粉体的粒度分布，测定催化剂磨损率，建立磨损模型。As a preferred technical solution of the present application, combining the catalyst particle size distribution with the mass percentage under the particle size in S1 can accurately estimate the particle size distribution of the powder after participating in the reaction, measure the catalyst wear rate, and establish a wear model.

与现有技术相比，本发明的有益效果：Compared with the prior art, the beneficial effects of the present invention:

在本申请的方案中：In the scheme of this application:

1.通过将催化剂粒度分布结合该粒度下的质量百分比能准确地估计出参与反应后粉体的粒度分布，测定催化剂磨损率，建立起更精确的磨损模型，克服了现有技术难以准确测量磨损率的问题，实现了流化态催化剂磨损率的准确测定；1. By combining the catalyst particle size distribution with the mass percentage under the particle size, the particle size distribution of the powder after participating in the reaction can be accurately estimated, the catalyst wear rate can be determined, and a more accurate wear model can be established, which overcomes the difficulty of accurately measuring wear in the prior art. The problem of the wear rate of the fluidized catalyst is realized, and the accurate measurement of the wear rate of the fluidized catalyst is realized;

2.通过由于粒径分布与耐磨度呈现正态分布关系，因此只要判断磨损前的粒径分布是否集中在75μm附近，粒径分布越接近75μm则耐磨性越差，同时通过磨损前后不同粒度颗粒的质量表征颗粒的磨损度，比值越趋近1则磨损度越低。2. Due to the normal distribution relationship between particle size distribution and wear resistance, it is only necessary to judge whether the particle size distribution before wear is concentrated around 75μm. The closer the particle size distribution is to 75μm, the worse the wear resistance. The quality of the particle size characterizes the degree of wear of the particles, and the closer the ratio is to 1, the lower the degree of wear.

附图说明：Description of drawings:

图1为本申请提供的流程图。FIG. 1 is a flowchart provided for this application.

具体实施方式Detailed ways

为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合附图，对本发明实施例中的技术方案进行清楚、完整的描述。显然，所描述的实施例是本发明的一部分实施例，而不是全部的实施例。In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, embodiments of the present invention.

因此，以下对本发明的实施例的详细描述并非旨在限制要求保护的本发明的范围，而是仅仅表示本发明的部分实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。Accordingly, the following detailed descriptions of embodiments of the present invention are not intended to limit the scope of the claimed invention, but merely represent some embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

如图1，本实施方式提出一种流态化催化剂磨损率的测定方法，包括以下步骤：S1、对催化剂颗粒粒径进行测量，得到催化剂颗粒粒度分布；S11、将催化剂颗粒筛分成多个粒径范围，对不同粒径范围的粉体质量进行测量；S12、将催化剂颗粒不同粒径范围的粉体质量与颗粒总质量作比，得到质量分布；S13、建立线性关系；S2、在催化剂参与芳构化反应后重新测量剩余颗粒质量与溢出质量，结合磨损发生前的质量分数估计出反应中发生磨损的颗粒质量；S21、根据磨损发生的时间和磨损前的粒径分布估计出磨损后的粒径分布；S3、评价固相催化剂的磨损性能，分析催化剂样品参与反应后的粒度分布，并计算不同粒度下颗粒质量的比值；S31分析催化剂样品磨损前后的粒径分布,以催化剂样品磨损前后催化剂颗粒粒径之比表示磨损程度并判断催化剂的抗磨损能力。As shown in FIG. 1, the present embodiment proposes a method for determining the wear rate of a fluidized catalyst, which includes the following steps: S1, measuring the particle size of the catalyst particles to obtain the particle size distribution of the catalyst particles; S11, sieving the catalyst particles into a plurality of particles Measure the powder mass of different particle size ranges; S12. Compare the powder mass of catalyst particles with different particle size ranges with the total mass of the particles to obtain the mass distribution; S13. Establish a linear relationship; S2. After the aromatization reaction, re-measure the mass of the remaining particles and the overflowed mass, and estimate the mass of the particles worn in the reaction based on the mass fraction before the wear; S21. According to the time of wear and the particle size distribution before wear, the after wear is estimated. Particle size distribution; S3. Evaluate the wear performance of the solid-phase catalyst, analyze the particle size distribution of the catalyst sample after participating in the reaction, and calculate the ratio of particle mass under different particle sizes; S31. Analyze the particle size distribution of the catalyst sample before and after the abrasion, and use the catalyst sample before and after the abrasion. The ratio of the particle size of the catalyst particles indicates the degree of wear and judges the anti-wear ability of the catalyst.

作为优选的实施方式，在上述方式的基础上，进一步的，S1中粒径分布以△D为间隔将颗粒按直径的大小划分为多个粒径区间，第i个区间内颗粒的平均粒径记做Di，则通过如下积分形式计算颗粒粒径分布公式为：As a preferred embodiment, on the basis of the above method, further, the particle size distribution in S1 divides the particles into multiple particle size intervals according to the size of the diameter with ΔD as the interval, and the average particle size of the particles in the i-th interval is Denoted as D i , the particle size distribution formula calculated by the following integral form is:

Figure BDA0003475828920000051
Figure BDA0003475828920000051

其中，Di第i个区间内颗粒的平均粒径。Among them, D i is the average particle size of the particles in the ith interval.

作为优选的实施方式，在上述方式的基础上，进一步的，S12催化剂粒子均为球形且密度均一，单个催化剂颗粒的质量公式为：As a preferred embodiment, on the basis of the above method, further, the S12 catalyst particles are spherical and uniform in density, and the mass formula of a single catalyst particle is:

Figure BDA0003475828920000061
Figure BDA0003475828920000061

其中ρ为密度，D为颗粒的平均粒径。where ρ is the density and D is the average particle size of the particles.

作为优选的实施方式，在上述方式的基础上，进一步的，S12中粉体质量与颗粒总质量作比公式为：

Figure BDA0003475828920000062
其中Mi为实验前筛分出来的某个粒径范围内的颗粒质量，M0为实验开始时加入的样品颗粒的总质量。As a preferred embodiment, on the basis of the above method, further, in S12, the formula for the ratio between the mass of the powder and the total mass of the particles is:
Figure BDA0003475828920000062
where Mi is the mass of particles within a certain particle size range sieved before the experiment, and M 0 is the total mass of the sample particles added at the beginning of the experiment.

作为优选的实施方式，在上述方式的基础上，进一步的，S13中建立线性关系中粒径分布与质量分数之间的线性关系公式为Pi＝R(D)3其中R(D)颗粒粒径分布数值。As a preferred embodiment, on the basis of the above method, further, the linear relationship between the particle size distribution and the mass fraction in the linear relationship established in S13 is as follows: P i =R(D) 3 where R(D) particle size diameter distribution value.

作为优选的实施方式，在上述方式的基础上，进一步的，S2中由于颗粒粒径与发生磨损的概率呈正态分布，则发生磨损的概率密度为：As a preferred embodiment, on the basis of the above method, further, in S2, since the particle size and the probability of wear are normally distributed, the probability density of wear is:

Figure BDA0003475828920000063
Figure BDA0003475828920000063

则磨损消耗的颗粒质量为:Then the mass of particles consumed by wear is:

M＝M0-M1+M2 M=M 0 -M 1 +M 2

其中剩余颗粒质量M1,溢出颗粒质量M2 The remaining particle mass M 1 , the overflow particle mass M 2

根据粒径分布得到不同粒径颗粒磨损的质量为：According to the particle size distribution, the wear quality of particles with different particle sizes is obtained as:

Mx＝M·∫f(lnx)dxM x =M·∫f(lnx)dx

其中f(Inx)为发生磨损的概率密度，M为颗粒质量。where f(Inx) is the probability density of wear and M is the particle mass.

S21磨损后的颗粒粒径分布Particle size distribution after wear of S21

Figure BDA0003475828920000071
Figure BDA0003475828920000071

其中R颗粒粒径分布数值。where R is the numerical value of particle size distribution.

S3由于粒径分布与耐磨度呈现正态分布关系，因此只要判断磨损前的粒径分布是否集中在75μm附近，粒径分布越接近75μm则耐磨性越差，同时通过磨损前后不同粒度颗粒的质量表征颗粒的磨损度：S3 has a normal distribution relationship between particle size distribution and wear resistance. Therefore, it is only necessary to judge whether the particle size distribution before wear is concentrated around 75μm. The closer the particle size distribution is to 75μm, the worse the wear resistance. The mass characterizes the degree of wear of the particles:

Figure BDA0003475828920000072
Figure BDA0003475828920000072

比值越趋近1则磨损度越低。The closer the ratio is to 1, the lower the degree of wear.

S31磨损程度为R(D)为催化剂颗粒磨损前的粒径分布，Rx(D)为磨损后的颗粒粒径分布S31 wear degree: R (D) is the particle size distribution of catalyst particles before wear, R x (D) is the particle size distribution after wear

磨损程度表示为：The degree of wear is expressed as:

Figure BDA0003475828920000073
Figure BDA0003475828920000073

通过两条粒径分布曲线的拟合程度判断颗粒抗磨损能力，抗磨损能力越高，拟合程度也越高，S1中将催化剂粒度分布结合该粒度下的质量百分比能准确地估计出参与反应后粉体的粒度分布测定催化剂磨损率建立磨损模型。The anti-wear ability of the particles is judged by the fitting degree of the two particle size distribution curves. The higher the anti-wear ability is, the higher the fitting degree is. In S1, combining the catalyst particle size distribution with the mass percentage at this particle size can accurately estimate the participation in the reaction The particle size distribution of the powder was used to determine the catalyst wear rate to establish a wear model.

工作原理：本发明在使用的过程中，S1、对催化剂颗粒粒径进行测量，得到催化剂颗粒粒度分布，S1中粒径分布以△D为间隔将颗粒按直径的大小划分为多个粒径区间，第i个区间内颗粒的平均粒径记做Di，则通过如下积分形式计算颗粒粒径分布公式为：Working principle: In the process of using the present invention, S1, measure the particle size of the catalyst particles to obtain the particle size distribution of the catalyst particles, and the particle size distribution in S1 divides the particles into multiple particle size intervals according to the size of the diameter with ΔD as the interval , the average particle size of the particles in the i-th interval is recorded as D i , then the particle size distribution formula is calculated by the following integral form:

Figure BDA0003475828920000081
Figure BDA0003475828920000081

其中，Di第i个区间内颗粒的平均粒径。Among them, D i is the average particle size of the particles in the ith interval.

S12催化剂粒子均为球形且密度均一，单个催化剂颗粒的质量公式为：The S12 catalyst particles are spherical and uniform in density. The mass formula of a single catalyst particle is:

Figure BDA0003475828920000082
Figure BDA0003475828920000082

其中ρ为密度，D为颗粒的平均粒径。where ρ is the density and D is the average particle size of the particles.

S12中粉体质量与颗粒总质量作比公式为：

Figure BDA0003475828920000083
其中Mi为实验前筛分出来的某个粒径范围内的颗粒质量，M0为实验开始时加入的样品颗粒的总质量。The formula for the ratio of powder mass to total particle mass in S12 is:
Figure BDA0003475828920000083
where Mi is the mass of particles within a certain particle size range sieved before the experiment, and M 0 is the total mass of the sample particles added at the beginning of the experiment.

S13中建立线性关系中粒径分布与质量分数之间的线性关系公式为Pi＝R(D)3其中R(D)颗粒粒径分布数值。The linear relationship formula between the particle size distribution and the mass fraction in establishing the linear relationship in S13 is P i =R(D) 3 where R(D) is the particle size distribution value.

S2、在催化剂参与芳构化反应后重新测量剩余颗粒质量与溢出质量，结合磨损发生前的质量分数估计出反应中发生磨损的颗粒质量；S2中由于颗粒粒径与发生磨损的概率呈正态分布，则发生磨损的概率密度为：S2. After the catalyst participates in the aromatization reaction, the mass of the remaining particles and the overflow mass are re-measured, and the mass of the particles that wear out in the reaction is estimated based on the mass fraction before the attrition occurs; in S2, the particle size and the probability of attrition are normal. distribution, then the probability density of wear is:

Figure BDA0003475828920000084
Figure BDA0003475828920000084

则磨损消耗的颗粒质量为:Then the mass of particles consumed by wear is:

M＝M0-M1+M2 M=M 0 -M 1 +M 2

其中剩余颗粒质量M1,溢出颗粒质量M2 The remaining particle mass M 1 , the overflow particle mass M 2

根据粒径分布得到不同粒径颗粒磨损的质量为：According to the particle size distribution, the wear quality of particles with different particle sizes is obtained as:

Mx＝M·∫f(lnx)dxM x =M·∫f(lnx)dx

其中f(Inx)为发生磨损的概率密度，M为颗粒质量。where f(Inx) is the probability density of wear and M is the particle mass.

S21根据磨损发生的时间和磨损前的粒径分布估计出磨损后的粒径分布，磨损后的颗粒粒径分布S21 According to the time of wear and the particle size distribution before wear, the particle size distribution after wear is estimated, and the particle size distribution after wear is

Figure BDA0003475828920000091
Figure BDA0003475828920000091

其中R颗粒粒径分布数值。where R is the numerical value of particle size distribution.

S3评价固相催化剂的磨损性能，分析催化剂样品参与反应后的粒度分布，并计算不同粒度下颗粒质量的比值；由于粒径分布与耐磨度呈现正态分布关系，因此只要判断磨损前的粒径分布是否集中在75μm附近，粒径分布越接近75μm则耐磨性越差，同时通过磨损前后不同粒度颗粒的质量表征颗粒的磨损度：S3 evaluates the wear performance of the solid-phase catalyst, analyzes the particle size distribution of the catalyst sample after participating in the reaction, and calculates the ratio of particle mass under different particle sizes; since the particle size distribution and the abrasion resistance show a normal distribution relationship, it is only necessary to judge the particle size before abrasion. Whether the particle size distribution is concentrated around 75μm, the closer the particle size distribution is to 75μm, the worse the wear resistance. At the same time, the wear degree of particles is characterized by the quality of particles with different particle sizes before and after wear:

Figure BDA0003475828920000092
Figure BDA0003475828920000092

比值越趋近1则磨损度越低。The closer the ratio is to 1, the lower the degree of wear.

S31分析催化剂样品磨损前后的粒径分布,以催化剂样品磨损前后催化剂颗粒粒径之比表示磨损程度并判断催化剂的抗磨损能力，磨损程度为R(D)为催化剂颗粒磨损前的粒径分布，Rx(D)为磨损后的颗粒粒径分布S31 analyzes the particle size distribution of the catalyst sample before and after abrasion, and uses the ratio of the particle size of the catalyst sample before and after abrasion to represent the degree of abrasion and to determine the anti-abrasion ability of the catalyst. The degree of abrasion is R(D) is the particle size distribution of the catalyst particle before abrasion, R x (D) is the particle size distribution after wear

磨损程度表示为：The degree of wear is expressed as:

Figure BDA0003475828920000093
Figure BDA0003475828920000093

通过两条粒径分布曲线的拟合程度判断颗粒抗磨损能力，抗磨损能力越高，拟合程度也越高，S1中将催化剂粒度分布结合该粒度下的质量百分比能准确地估计出参与反应后粉体的粒度分布测定催化剂磨损率建立磨损模型。The anti-wear ability of the particles is judged by the fitting degree of the two particle size distribution curves. The higher the anti-wear ability is, the higher the fitting degree is. In S1, combining the catalyst particle size distribution with the mass percentage at this particle size can accurately estimate the participation in the reaction The particle size distribution of the powder was used to determine the catalyst wear rate to establish a wear model.

以上实施例仅用以说明本发明而并非限制本发明所描述的技术方案，尽管本说明书参照上述的各个实施例对本发明已进行了详细的说明，但本发明不局限于上述具体实施方式，因此任何对本发明进行修改或等同替换；而一切不脱离发明的精神和范围的技术方案及其改进，其均涵盖在本发明的权利要求范围当中。The above embodiments are only used to illustrate the present invention and do not limit the technical solutions described in the present invention. Although the present specification has been described in detail with reference to the above-mentioned embodiments, the present invention is not limited to the above-mentioned specific embodiments. Therefore, Any modification or equivalent replacement of the present invention; and all technical solutions and improvements that do not depart from the spirit and scope of the present invention are all included in the scope of the claims of the present invention.

Claims (10)

1. A method for measuring the wear rate of a fluidized catalyst is characterized by comprising the following steps: s1, measuring the particle size of the catalyst particles to obtain the particle size distribution of the catalyst particles; s11, screening the catalyst particles into a plurality of particle size ranges, and measuring the mass of powder in different particle size ranges; s12, comparing the powder mass of the catalyst particles in different particle size ranges with the total mass of the particles to obtain mass distribution; s13, establishing a linear relation; s2, measuring the mass of the residual particles and the overflow mass again after the catalyst participates in the aromatization reaction, and estimating the mass of the particles worn in the reaction by combining the mass fraction before the wear; s21, estimating the particle size distribution after abrasion according to the time when abrasion occurs and the particle size distribution before abrasion; s3, evaluating the abrasion performance of the solid-phase catalyst, analyzing the particle size distribution of the catalyst sample after the catalyst sample participates in the reaction, and calculating the mass ratio of particles with different particle sizes; s31, analyzing the particle size distribution of the catalyst sample before and after abrasion, expressing the abrasion degree by the ratio of the particle size of the catalyst before and after the abrasion of the catalyst sample and judging the abrasion resistance of the catalyst.
2. A method for determining the wear rate of a fluidized catalyst according to claim 1, wherein the particle size distribution in S1 is obtained by dividing the particles into a plurality of particle size intervals at intervals of Δ D, and the average particle size of the particles in the i-th interval is denoted as DiThen, the particle size distribution formula is calculated by the following integral form:
Figure FDA0003475828910000011
wherein D isiAverage particle size of particles in the i-th interval.
3. The method for determining the wear rate of a fluidized catalyst according to claim 1, wherein the S12 catalyst particles are spherical and have uniform density, and the mass formula of each single catalyst particle is as follows:
Figure FDA0003475828910000012
where ρ is the density and D is the average particle size of the particles.
4. The method for measuring the wear rate of a fluidized catalyst according to claim 1, wherein the ratio of the mass of the powder to the total mass of the particles in the S12 is represented as follows:
Figure FDA0003475828910000021
wherein M isiMass of particles in a certain particle size range, M, sieved before the experiment0Is the total mass of sample particles added at the beginning of the experiment.
5. The method for determining the wear rate of a fluidized catalyst according to claim 1, wherein the linear relationship between the particle size distribution and the mass fraction in the linear relationship established in S13 is represented by
Pi＝R(D)3
Wherein R (D) the particle size distribution value.
6. The method for determining the wear rate of a fluidized catalyst according to claim 1, wherein the particle size of the particles in S2 is normally distributed with the probability of wear, so that the probability density of wear is:
Figure FDA0003475828910000022
the mass of particles consumed by abrasion is then:
M＝M0-M1+M2
wherein the mass M of the remaining particles1Mass M of overflowing particles2
The wear mass of the particles with different particle sizes obtained according to the particle size distribution is as follows:
Mx＝M·∫f(ln x)dx
where f (Inx) is the probability density of attrition occurring and M is the particle mass.
7. A method for determining the wear rate of a fluidized catalyst according to claim 1, wherein the size distribution of the abraded particles of S21 is determined
Figure FDA0003475828910000031
Wherein R is the particle size distribution number.
8. The method of claim 1, wherein the S3 is characterized in that the particle size distribution and the attrition resistance are normally distributed, so that if the particle size distribution before attrition is determined to be concentrated around 75 μm, the attrition resistance is worse the closer the particle size distribution is to 75 μm, and the attrition resistance of the particles is characterized by the mass of the particles with different particle sizes before and after attrition:
Figure FDA0003475828910000032
the wear is lower the closer the ratio approaches 1.
9. A method for determining the attrition rate of a fluidized catalyst as claimed in claim 1 wherein the degree of abrasion of S31 is R (D) which is the particle size distribution of the catalyst particles before attrition, Rx(D) As particle size distribution of abraded particles
The degree of wear is expressed as:
Figure FDA0003475828910000033
and judging the abrasion resistance of the particles according to the fitting degree of the two particle size distribution curves, wherein the higher the abrasion resistance is, the higher the fitting degree is.
10. The method for determining the wear rate of a fluidized catalyst according to claim 1, wherein the wear rate of the catalyst is determined by combining the particle size distribution of the catalyst in S1 with the mass percentage of the particle size to accurately estimate the particle size distribution of the powder after the powder participates in the reaction, so as to establish a wear model.
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