Method for calculating wax oil addition amount for calling back asphalt penetration

Abstract

The application provides a wax oil addition amount calculation method for adjusting asphalt penetration, and is characterized in that the method comprises the following steps: a) obtaining the yield of first distillation petroleum asphalt according to a pilot simulation atmospheric and vacuum distillation device, obtaining the penetration of the first distillation petroleum asphalt through a test, determining the expected asphalt penetration, and determining the quality of the adjusted asphalt; b) calculating the yield of the asphalt under the first distillation condition based on the expected asphalt penetration; and c) calculating the wax oil addition amount based on the relationship between the asphalt and the yield. Compared with the prior art, the wax oil addition amount calculation method for adjusting asphalt penetration provided by the application can quickly calculate the wax oil addition amount for adjusting asphalt penetration, improves the accuracy of asphalt yield adjustment, shortens the production cycle of the asphalt, and thus has important significance for improving the apparent benefit of a refinery and has a wide application prospect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of petroleum chemical industry, more particularly, to a method for calculating the wax oil addition amount for adjusting the penetration of asphalt. BACKGROUND

[0002] Before mass production of asphalt products, small-scale and pilot tests are often needed to determine the yield thereof, and only when the yield of petroleum asphalt is appropriate can asphalt with the expected penetration be obtained. In China, different asphalt grades are divided based on the penetration criterion, and therefore, it is crucial to determine the yield of petroleum asphalt. During the small-scale and pilot tests, the first distillation is difficult to obtain the expected grade of asphalt, and the yield needs to be adjusted to achieve the same, and the change in yield often indicates the change in the quality of asphalt, i.e., the remaining mass of the crude oil at the bottom of the vacuum tower after the products are separated from the side lines of the crude oil unit. In small-scale and pilot tests and production workshops, the wax oil from the third side line or even the second side line is often pressed into the vacuum residue to increase the penetration of asphalt by adjusting the temperature gradient, and the appropriate amount of wax oil can obtain the expected grade of asphalt, and therefore, how to determine the amount of wax oil added is crucial in the production of asphalt.

[0003] Currently, due to the complex nature of crude oil, the yield of petroleum asphalt is difficult to reflect the regularity, and no relevant prediction formula has been established at home and abroad, and the amount of wax oil is often added based on experience. Before obtaining the asphalt product with the expected penetration, this empirical test often needs to be performed for 3 times or more, and the full-index detection of each empirical test needs 1-2 days, and the time cost is difficult to estimate.

[0004] Therefore, it is of great significance to establish a method for calculating the amount of wax oil for adjusting the penetration of asphalt to improve the accuracy of yield adjustment, shorten the production cycle of petroleum asphalt, and thus improve the explicit benefits of the refinery. SUMMARY

[0005] In view of this, the present application aims to provide a method for calculating the amount of wax oil for adjusting the penetration of asphalt to improve the accuracy of yield adjustment of asphalt and shorten the production cycle of asphalt.

[0006] The present application provides a method for calculating the amount of wax oil for adjusting the penetration of asphalt, characterized in that the method comprises the following steps:

[0007] a) determining the yield of the first distillation petroleum asphalt according to the simulation of the vacuum distillation unit in the pilot test, obtaining the penetration of the first distillation petroleum asphalt, determining the expected penetration of the asphalt, and determining the quality of the adjusted asphalt;

[0008] b) calculating the yield of the asphalt based on the expected penetration of the asphalt under the condition of the first distillation;

[0009] c) calculating the wax oil addition amount based on the relationship between the asphalt and the yield.

[0010] Preferably, the pilot simulation atmospheric-vacuum distillation unit in step a) is a real boiling point distillation cutting unit.

[0011] Preferably, the formula for the calculation in step b) is:

[0012]

[0013] In the formula, λ2 is the calculated asphalt yield, %; λ1 is the yield of the first distilled petroleum asphalt, %; P1 is the penetration of the first distilled petroleum asphalt, dmm; and P2 is the expected asphalt penetration, dmm.

[0014] Preferably, the formula for the calculation based on the relationship between the asphalt and the yield in step c) is:

[0015]

[0016] In the formula, m is the addition mass of the wax oil, g; M is the mass of the adjusted asphalt, g; λ2 is the calculated asphalt yield, %; and λ1 is the yield of the first distilled petroleum asphalt, %.

[0017] Preferably, in the formula, the value of M is determined after the expected asphalt penetration is determined in step a).

[0018] The present application provides a method for calculating the wax oil addition amount for adjusting the penetration of asphalt, characterized by comprising the following steps: a) determining the yield of the first distilled petroleum asphalt according to a pilot simulation atmospheric-vacuum distillation unit, obtaining the penetration of the first distilled petroleum asphalt, determining the expected asphalt penetration, and determining the mass of the adjusted asphalt; b) calculating the yield of the asphalt based on the expected asphalt penetration under the first distillation condition; and c) calculating the wax oil addition amount based on the relationship between the asphalt and the yield. Compared with the prior art, the method for calculating the wax oil addition amount for adjusting the penetration of asphalt provided by the present application adopts specific steps, can quickly calculate the wax oil addition amount for adjusting the penetration of asphalt, improves the accuracy of the adjustment of the asphalt yield, shortens the production cycle of the asphalt, and thus has important significance for improving the apparent income of a refinery and has a wide application prospect. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The flowchart of the method for calculating the wax oil addition amount for adjusting the penetration of asphalt provided by the embodiments of the present application is shown. DETAILED DESCRIPTION

[0020] The technical solutions of the present application will be clearly and completely described below with reference to the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0021] The present application provides a wax oil addition amount calculation method for adjusting asphalt penetration, characterized in that it comprises the following steps:

[0022] a) obtaining the yield of the first distillation petroleum asphalt according to the pilot simulation atmospheric-vacuum distillation unit, obtaining the penetration of the first distillation petroleum asphalt through testing, determining the expected asphalt penetration, and determining the quality of the adjusted asphalt;

[0023] b) calculating the yield of the asphalt under the first distillation condition based on the expected asphalt penetration;

[0024] c) calculating the wax oil addition amount based on the relationship between the asphalt and the yield.

[0025] The present application first obtains the yield of the first distillation petroleum asphalt according to the pilot simulation atmospheric-vacuum distillation unit, obtains the penetration of the first distillation petroleum asphalt through testing, determines the expected asphalt penetration, and determines the quality of the adjusted asphalt.

[0026] In the present application, the pilot simulation atmospheric-vacuum distillation unit is preferably a real boiling point distillation cutting device; the present application does not have special restrictions on the process of obtaining the yield of the first distillation petroleum asphalt using the above-mentioned real boiling point distillation cutting device, and any technical solution known to those skilled in the art can be used.

[0027] In the present application, the process of obtaining the penetration of the first distillation petroleum asphalt through testing does not have special restrictions, and any technical solution known to those skilled in the art can be used.

[0028] In the present application, the expected asphalt penetration (grade) is determined according to the actual situation; after the expected asphalt penetration is determined, the value of the quality of the adjusted asphalt can be further determined.

[0029] The present application can collect all the basic data required for subsequent calculation through the above step a).

[0030] After that, the present application calculates the yield of the asphalt under the first distillation condition based on the expected asphalt penetration; specifically, the yield of the asphalt is calculated and predicted under the first distillation condition based on the expected asphalt penetration under the action of the pigging load.

[0031] In the present application, the formula of the calculation is preferably:

[0032]

[0033] In the formula, λ2 is the calculated asphalt yield, %; λ1 is the yield of the first distilled petroleum asphalt, %; P1 is the penetration of the first distilled petroleum asphalt, dmm; P2 is the expected asphalt penetration, dmm; the above data, except the calculation result λ2, can be obtained through step a), which will not be repeated here.

[0034] In the present application, the above calculation formula is fitted based on a large number of blending test schemes and their penetration test results in the early stage of the applicant.

[0035] After λ2 is calculated, the wax oil addition amount is calculated based on the relationship between asphalt and yield in the present application.

[0036] In the present application, the formula of the calculation based on the relationship between asphalt and yield is preferably:

[0037]

[0038] In the formula, m is the added mass of wax oil, g; M is the mass of the adjusted asphalt, g; λ2 is the calculated asphalt yield, %; λ1 is the yield of the first distilled petroleum asphalt, %; the above data, except the calculation result m, can be obtained through steps a) and b), which will not be repeated here.

[0039] In the present application, the M in the formula is determined after the expected asphalt penetration is determined in step a), and the numerical value of the mass M of the adjusted asphalt is determined.

[0040] The wax oil addition amount calculation method for the adjusted asphalt penetration provided by the present application adopts specific steps, which can quickly calculate the wax oil addition amount for the adjusted asphalt penetration, improve the accuracy of asphalt yield adjustment, and shorten the production cycle of asphalt, thus having important significance for improving the apparent benefit of the refinery and having a wide application prospect.

[0041] The application provides a wax oil addition amount calculation method for adjusting asphalt penetration, and is characterized by comprising the following steps: a) obtaining the yield of first distillation petroleum asphalt according to a pilot simulation atmospheric-vacuum distillation device, obtaining the penetration of the first distillation petroleum asphalt through a test, determining the expected asphalt penetration, and determining the quality of the adjusted asphalt; b) calculating the yield of the asphalt under the first distillation condition based on the expected asphalt penetration; and c) calculating the wax oil addition amount based on the relationship between the asphalt and the yield. Compared with the prior art, the wax oil addition amount calculation method for adjusting asphalt penetration provided by the application can quickly calculate the wax oil addition amount for adjusting asphalt penetration, improves the accuracy of asphalt yield adjustment, shortens the production cycle of the asphalt, and therefore has important significance for improving the apparent benefit of a refinery and has a wide application prospect.

[0042] In order to further illustrate the application, the following examples are used for detailed description.

[0043] Examples

[0044] Reference Figure 1 As shown in the figure, Figure 1 The flow chart of the wax oil addition amount calculation method for adjusting asphalt penetration provided by the embodiment of the application is shown.

[0045] In a certain real boiling point distillation cutting test, the yield of petroleum asphalt is calculated as 56.89%, the obtained asphalt is detected for penetration, and the penetration is obtained as 45.3 dmm. Now, the asphalt of 70 grade is needed, and 600 g of asphalt is used for asphalt penetration adjustment experiment.

[0046] Step one, the quality of the first distillation asphalt, i.e. the yield of the first distillation petroleum asphalt λ1=56.89%, is obtained according to the pilot simulation atmospheric-vacuum distillation device (real boiling point distillation cutting device), the penetration of the first distillation petroleum asphalt P1=45.3 dmm is obtained through a test, the expected asphalt penetration (grade) P2=70 dmm is determined, and the quality of the adjusted asphalt M=600 g is determined;

[0047] Step two, the yield of the asphalt is predicted based on the expected asphalt penetration under the first distillation condition, and the calculation formula is as follows:

[0048]

[0049] Step three, the addition amount of the wax oil is calculated based on the relationship between the asphalt and the yield, and the calculation formula is as follows:

[0050]

[0051] According to the above calculation results, 25.16 g of wax oil is incorporated into the asphalt, and stirred on a heating jacket at 135°C for 1 h; then the blended sample is detected based on the T0604-2011 asphalt penetration test in the standard JTE20-2011 "Highway Engineering Asphalt and Asphalt Mixture Test Regulations", and the detection result is 69.2 dmm, the prediction deviation is 1.14%, the detection result meets the national standard requirements, indicating that the formula is accurate and reliable.

[0052] The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for calculating the amount of wax oil to be added to call back the penetration of asphalt, characterized by, The method comprises the following steps: a) obtaining the yield of the first distillation petroleum pitch according to a pilot simulation atmospheric and vacuum distillation unit, obtaining the penetration of the first distillation petroleum pitch, determining the expected pitch penetration, and determining the quality of the adjusted pitch; b) calculating the yield of the pitch based on the expected pitch penetration under the first distillation condition; c) calculating the wax oil addition amount based on the relationship between the pitch and the yield; The formula of the calculation in step b) is: In the formula, λ2 is the calculated pitch yield, %; λ1 is the yield of the first distillation petroleum pitch, %; P1 is the penetration of the first distillation petroleum pitch, dmm; and P2 is the expected pitch penetration, dmm; The formula of the calculation based on the relationship between the pitch and the yield in step c) is: In the formula, m is the addition amount of the wax oil, g; M is the quality of the adjusted pitch, g; λ2 is the calculated pitch yield, %; and λ1 is the yield of the first distillation petroleum pitch, %.

2. The method of claim 1, wherein the amount of wax oil to be added to the bitumen is calculated based on the penetration of the bitumen. The pilot simulation atmospheric and vacuum distillation unit in step a) is a true boiling point distillation cutting device.

3. The method of claim 1, wherein the amount of wax oil to be added to the bitumen is calculated based on the penetration of the bitumen. In the formula, the value of M is determined after the expected pitch penetration is determined in step a). The formula of the calculation based on the relationship between the pitch and the yield in step c) is: In the formula, m is the addition amount of the wax oil, g; M is the quality of the adjusted pitch, g; λ2 is the calculated pitch yield, %; and λ1 is the yield of the first distillation petroleum pitch, %.

Images