Device for producing aromatic chemicals from coal tar
By separating diesel components through extraction and fractionation components, and combining them with alkylation, decolorization and other treatments, the problem of redundant equipment in multi-product production is solved, achieving efficient utilization and improved purity.
Patent Information
- Application Number
- CN202520132943.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-20
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2035-01-20
AI Technical Summary
In the existing technology, the production of high-boiling-point aromatics, aromatic heat transfer oils and aromatic mineral oils requires at least two sets of production equipment, resulting in low raw material utilization and complex processing procedures.
Diesel fuel is separated into aromatic and non-aromatic components using extraction and fractionation components, and further separated by boiling point differences. Combined with alkylation, decolorization, and hydrorefining components, a single set of equipment can produce multiple products.
It improved the utilization rate of raw materials, simplified the processing flow, and increased the purity of products and the proportion of products that meet national standards.
Smart Images
Figure CN223737999U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of coal tar processing, and particularly relates to a device for producing aromatic hydrocarbon chemicals from coal tar. BACKGROUND
[0002] In the prior art, high-boiling aromatic hydrocarbons and aromatic hydrocarbon heat transfer oil are mainly produced by naphtha catalytic reforming-aromatic extraction-distillation refining-alkylation technology, and aromatic-based mineral oil is produced by solvent refining-hydrogenation refining-molecular sieve dewaxing technology. The above three products need to be produced by at least two sets of production equipment, resulting in low raw material utilization, resource waste, and complex processing flow. SUMMARY
[0003] Therefore, the utility model provides a device for producing aromatic hydrocarbon chemicals from coal tar to solve the problem that high-boiling aromatic hydrocarbons, aromatic hydrocarbon heat transfer oil and aromatic-based mineral oil need to be produced by at least two sets of production equipment, resulting in low raw material utilization, resource waste and complex processing flow.
[0004] The utility model provides a device for producing aromatic hydrocarbon chemicals from coal tar, comprising:
[0005] An extraction assembly is used to separate diesel oil into aromatic hydrocarbon components and non-aromatic hydrocarbon components.
[0006] A first fractionating assembly is connected to the extraction assembly, and the first fractionating assembly is used to separate the aromatic hydrocarbon components into high-boiling aromatic hydrocarbon components, aromatic hydrocarbon heat transfer oil components and aromatic-based mineral oil components.
[0007] The extraction assembly and the first fractionating assembly are used to separate diesel oil into high-boiling aromatic hydrocarbon components, aromatic hydrocarbon heat transfer oil components and aromatic-based mineral oil components, thereby realizing the production of three products by one set of production equipment, improving the utilization rate of diesel oil, saving resources and simplifying the processing flow. The extraction assembly can separate aromatic hydrocarbon components and non-aromatic hydrocarbon components according to their different solubilities in solvents. The first fractionating assembly can separate high-boiling aromatic hydrocarbon components, aromatic hydrocarbon heat transfer oil components and aromatic-based mineral oil components according to their different boiling points.
[0008] In an alternative embodiment, the device for producing aromatic hydrocarbon chemicals from coal tar comprises:
[0009] A second fractionating assembly is connected to the first fractionating assembly, and the second fractionating assembly is used to separate the high-boiling aromatic hydrocarbon components into high-boiling aromatic hydrocarbons.
[0010] And / or, an alkylation assembly is connected to the first fractionating assembly, and the alkylation assembly is used to convert the aromatic hydrocarbon heat transfer oil components into aromatic hydrocarbon heat transfer oil.
[0011] And / or, a decoloring assembly connected with the first fractionating assembly, the decoloring assembly being used for decoloring the aromatic mineral oil component into aromatic mineral oil.
[0012] Beneficial effects: By adopting the second fractionating assembly to fractionate the high-boiling aromatic hydrocarbon component, the purity of the high-boiling aromatic hydrocarbon can be improved; by adopting the alkylation assembly to alkylate the aromatic hydrocarbon heat conducting oil component, the purity of the aromatic hydrocarbon heat conducting oil can be improved; by adopting the decoloring assembly to decolor the aromatic mineral oil component, the colority of the aromatic mineral oil can meet the national standard.
[0013] In an alternative embodiment, the high-boiling aromatic hydrocarbon component is separated into at least two high-boiling aromatic hydrocarbons.
[0014] In an alternative embodiment, the high-boiling aromatic hydrocarbon component is separated into four high-boiling aromatic hydrocarbons, namely high-boiling aromatic hydrocarbon SA-1000, high-boiling aromatic hydrocarbon SA-1500, high-boiling aromatic hydrocarbon SA-1800 and high-boiling aromatic hydrocarbon SA-2000.
[0015] In an alternative embodiment, the device for producing aromatic hydrocarbon chemicals from coal tar comprises:
[0016] A third fractionating assembly connected with the extraction assembly, the third fractionating assembly being used for separating the hydrofining oil into the diesel oil, naphtha and hydrofining tail oil.
[0017] Beneficial effects: By adopting the third fractionating assembly to fractionate the hydrofining oil, the naphtha and hydrofining tail oil can be separated, thereby improving the purity of the diesel oil.
[0018] In an alternative embodiment, the device for producing aromatic hydrocarbon chemicals from coal tar comprises:
[0019] A hydrocracking assembly connected with the third fractionating assembly, the hydrocracking assembly being used for cracking the hydrofining tail oil and entering the third fractionating assembly together with the hydrofining oil.
[0020] Beneficial effects: By adopting the hydrocracking assembly, the hydrofining tail oil can be treated to be light and recycled, thereby improving the resource utilization rate.
[0021] In an alternative embodiment, the device for producing aromatic hydrocarbon chemicals from coal tar comprises:
[0022] A hydrofining assembly connected with the third fractionating assembly, the hydrofining assembly being used for treating the mixed distillate oil into the hydrofining oil.
[0023] Beneficial effects: by adopting the hydrofining assembly, nitrogen, oxygen, sulfur impurities and trace metal elements in the mixed distillate oil can be removed, and higher purity hydrofining oil can be obtained.
[0024] In an alternative embodiment, the coal tar production of aromatic chemical device comprises:
[0025] The fourth fractionating assembly is connected with the hydrofining assembly, and the fourth fractionating assembly is used for separating the coking oil gas into the mixed distillate oil, the phenol oil and the bottom oil.
[0026] Beneficial effects: by adopting the fourth fractionating assembly, oxygen-containing compounds in the coking oil gas can be separated out, so that the purity of the mixed distillate oil is improved.
[0027] In an alternative embodiment, the coal tar production of aromatic chemical device comprises:
[0028] The delayed coking assembly is connected with the fourth fractionating assembly, and the delayed coking assembly is used for cracking the coal tar into the coking oil gas and the pitch coke, and the bottom oil and the coal tar enter the delayed coking assembly together.
[0029] Beneficial effects: by adopting the delayed coking assembly, the coal tar can be subjected to light weight treatment, and the pitch coke and mechanical impurities are removed, so that the quality of the coking oil gas is improved.
[0030] In an alternative embodiment, the coal tar is a medium-temperature coal tar or a low-temperature coal tar. BRIEF DESCRIPTION OF DRAWINGS
[0031] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed in the following specific embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.
[0032] Figure 1 It is a structure schematic view of a coal tar production of aromatic chemical device of the embodiments of the present application.
[0033] MARKED EXPLANATION:
[0034] 1, extraction assembly; 2, first fractionating assembly; 3, second fractionating assembly; 4, alkylation assembly; 5, decoloring assembly; 6, third fractionating assembly; 7, hydrocracking assembly; 8, hydrofining assembly; 9, fourth fractionating assembly; 10, delayed coking assembly. DETAILED DESCRIPTION
[0035] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described in the following with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.
[0036] The embodiments of the utility model will be described below with reference to the drawings. Figure 1
[0037] According to the embodiments of the utility model, a device for producing aromatic hydrocarbon chemicals from coal tar is provided, comprising: an extraction assembly 1 for separating diesel oil into aromatic hydrocarbon components and non-aromatic hydrocarbon components; a first fractional distillation assembly 2 connected with the extraction assembly 1, the first fractional distillation assembly 2 being used for separating the aromatic hydrocarbon components into high-boiling-point aromatic hydrocarbon components, aromatic hydrocarbon heat conducting oil components and aromatic-based mineral oil components.
[0038] By adopting the extraction assembly 1 and the first fractional distillation assembly 2, the diesel oil can be separated into high-boiling-point aromatic hydrocarbon components, aromatic hydrocarbon heat conducting oil components and aromatic-based mineral oil components, thereby realizing the production of three kinds of products by using one set of production equipment, improving the utilization rate of diesel oil, saving resources, and simplifying the processing flow; the extraction assembly 1 can separate the aromatic hydrocarbon components and the non-aromatic hydrocarbon components according to their different solubilities in solvents; and the first fractional distillation assembly 2 can separate the high-boiling-point aromatic hydrocarbon components, the aromatic hydrocarbon heat conducting oil components and the aromatic-based mineral oil components according to their different boiling points.
[0039] As shown in FIG. Figure 1 In one embodiment, the device for producing aromatic hydrocarbon chemicals from coal tar comprises: a second fractional distillation assembly 3 connected with the first fractional distillation assembly 2, the second fractional distillation assembly 3 being used for separating the high-boiling-point aromatic hydrocarbon components into high-boiling-point aromatic hydrocarbons. The high-boiling-point aromatic hydrocarbon components are separated into four high-boiling-point aromatic hydrocarbons, namely high-boiling-point aromatic hydrocarbon SA-1000, high-boiling-point aromatic hydrocarbon SA-1500, high-boiling-point aromatic hydrocarbon SA-1800 and high-boiling-point aromatic hydrocarbon SA-2000. By adopting the second fractional distillation assembly 3 to fractionate the high-boiling-point aromatic hydrocarbon components, the purity of the high-boiling-point aromatic hydrocarbons can be improved. As a convertible implementation, the second fractional distillation assembly 3 can also not be provided. As a convertible implementation, the high-boiling-point aromatic hydrocarbon components can also be separated into two, three or five high-boiling-point aromatic hydrocarbons, which are not limited here.
[0040] As shown in FIG. Figure 1 As shown in the figure, in one embodiment, the device for producing aromatic hydrocarbon chemicals from coal tar comprises an alkylation assembly 4 connected with the first fractionation assembly 2, and the alkylation assembly 4 is used for converting the aromatic heat conducting oil component into aromatic heat conducting oil. By using the alkylation assembly 4 to alkylate the aromatic heat conducting oil component, the purity of the aromatic heat conducting oil can be improved. As an alternative embodiment, the alkylation assembly 4 can also be omitted.
[0041] As shown in the figure, in one embodiment, the device for producing aromatic hydrocarbon chemicals from coal tar comprises a decoloring assembly 5 connected with the first fractionation assembly 2, and the decoloring assembly 5 is used for decoloring the aromatic mineral oil component into aromatic mineral oil. The decoloring assembly 5 adopts fixed bed decoloring. By using the decoloring assembly 5 to decolor the aromatic mineral oil component, the colority of the aromatic mineral oil can meet the national standard. As an alternative embodiment, the decoloring assembly 5 can also be omitted. As an alternative embodiment, the decoloring can also be performed by filtering or adding flocculants, which is not limited here. Figure 1 As shown in the figure, in one embodiment, the device for producing aromatic hydrocarbon chemicals from coal tar comprises a third fractionation assembly 6 connected with the extraction assembly 1, and the third fractionation assembly 6 is used for separating the hydrorefined oil into diesel, naphtha and hydrorefined tail oil. By using the third fractionation assembly 6 to fractionate the hydrorefined oil, the naphtha and hydrorefined tail oil can be separated, and the purity of the diesel can be improved.
[0042] Figure 1 As shown in the figure, in one embodiment, the device for producing aromatic hydrocarbon chemicals from coal tar comprises a hydrocracking assembly 7 connected with the third fractionation assembly 6, and the hydrocracking assembly 7 is used for cracking the hydrorefined tail oil and entering the third fractionation assembly 6 together with the hydrorefined oil. By using the hydrocracking assembly 7, the hydrorefined tail oil can be subjected to light weight treatment for recycling, and the resource utilization rate can be improved. As an alternative embodiment, the hydrocracking assembly 7 can also be omitted.
[0043] As shown in the figure, in one embodiment, the device for producing aromatic hydrocarbon chemicals from coal tar comprises a hydrorefining assembly 8 connected with the third fractionation assembly 6, and the hydrorefining assembly 8 is used for treating the mixed distillate oil into hydrorefined oil. By using the hydrorefining assembly 8, the nitrogen, oxygen, sulfur impurities and trace metal elements in the mixed distillate oil can be removed, and the hydrorefined oil with higher purity can be obtained. Figure 1 As shown in the figure, in one embodiment, the device for producing aromatic hydrocarbon chemicals from coal tar comprises a hydrorefining assembly 8 connected with the third fractionation assembly 6, and the hydrorefining assembly 8 is used for treating the mixed distillate oil into hydrorefined oil. By using the hydrorefining assembly 8, the nitrogen, oxygen, sulfur impurities and trace metal elements in the mixed distillate oil can be removed, and the hydrorefined oil with higher purity can be obtained.
[0044] Figure 1 As shown in the figure, in one embodiment, the device for producing aromatic hydrocarbon chemicals from coal tar comprises a hydrorefining assembly 8 connected with the third fractionation assembly 6, and the hydrorefining assembly 8 is used for treating the mixed distillate oil into hydrorefined oil. By using the hydrorefining assembly 8, the nitrogen, oxygen, sulfur impurities and trace metal elements in the mixed distillate oil can be removed, and the hydrorefined oil with higher purity can be obtained.
[0045] As shown in the figure, in one embodiment, the device for producing aromatic hydrocarbon chemicals from coal tar comprises a hydrorefining assembly 8 connected with the third fractionation assembly 6, and the hydrorefining assembly 8 is used for treating the mixed distillate oil into hydrorefined oil. By using the hydrorefining assembly 8, the nitrogen, oxygen, sulfur impurities and trace metal elements in the mixed distillate oil can be removed, and the hydrorefined oil with higher purity can be obtained. Figure 1 As shown in the figure, in one embodiment, the device for producing aromatic hydrocarbon chemicals from coal tar comprises: a fourth fractionating assembly 9 connected with the hydrofining assembly 8, the fourth fractionating assembly 9 being used for separating the coking oil gas into mixed distillate oil, phenol oil and bottom oil. By using the fourth fractionating assembly 9, the oxygen-containing compounds in the coking oil gas can be separated out, so as to improve the purity of the mixed distillate oil.
[0046] As shown in the figure, Figure 1 As shown in the figure, in one embodiment, the device for producing aromatic hydrocarbon chemicals from coal tar comprises: a delayed coking assembly 10 connected with the fourth fractionating assembly 9, the delayed coking assembly 10 being used for cracking the coal tar into coking oil gas and pitch coke, and the bottom oil and the coal tar entering the delayed coking assembly 10 together. The coal tar is medium-temperature coal tar. By using the delayed coking assembly 10, the coal tar can be subjected to lightening treatment, and the pitch coke and mechanical impurities can be removed, so as to improve the quality of the coking oil gas. As an alternative embodiment, the coal tar can also be low-temperature coal tar.
[0047] The device for producing aromatic hydrocarbon chemicals from coal tar in the embodiment can not only prepare high-boiling-point aromatic hydrocarbon SA-1000, high-boiling-point aromatic hydrocarbon SA-1500, high-boiling-point aromatic hydrocarbon SA-1800, high-boiling-point aromatic hydrocarbon SA-2000, aromatic hydrocarbon heat transfer oil and aromatic-based mineral oil, but also obtain naphtha, phenol oil and pitch coke, so that the full distillation of the medium-temperature coal tar can be fully utilized, and the utilization rate of the medium-temperature coal tar is maximized.
[0048] Although the embodiments of the present application are described in conjunction with the drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope defined by the appended claims.
Claims
1. An apparatus for the production of aromatic chemicals from coal tar, characterized by, The device for producing aromatic hydrocarbon chemicals from coal tar comprises: a first fractionating assembly (2) connected with the extraction assembly (1), the first fractionating assembly (2) being used for separating the aromatic hydrocarbon component into a high-boiling aromatic hydrocarbon component, an aromatic hydrocarbon heat transfer oil component, and an aromatic-based mineral oil component. The device for producing aromatic hydrocarbon chemicals from coal tar comprises:
2. The apparatus for production of aromatic chemicals from coal tar according to claim 1, wherein, a second fractionating assembly (3) connected with the first fractionating assembly (2), the second fractionating assembly (3) being used for separating the high-boiling aromatic hydrocarbon component into high-boiling aromatic hydrocarbons; and / or, an alkylation assembly (4) connected with the first fractionating assembly (2), the alkylation assembly (4) being used for converting the aromatic hydrocarbon heat transfer oil component into aromatic hydrocarbon heat transfer oil; and / or, a decoloring assembly (5) connected with the first fractionating assembly (2), the decoloring assembly (5) being used for decoloring the aromatic-based mineral oil component into aromatic-based mineral oil. The high-boiling aromatic hydrocarbon component is separated into at least two high-boiling aromatic hydrocarbons.
3. The apparatus for production of aromatic chemicals from coal tar as claimed in claim 2 wherein, The high-boiling aromatic hydrocarbon component is separated into four high-boiling aromatic hydrocarbons, namely high-boiling aromatic hydrocarbon SA-1000, high-boiling aromatic hydrocarbon SA-1500, high-boiling aromatic hydrocarbon SA-1800, and high-boiling aromatic hydrocarbon SA-2000.
4. The apparatus for production of aromatic chemicals from coal tar as claimed in claim 3 wherein, The device for producing aromatic hydrocarbon chemicals from coal tar comprises:
5. The apparatus for coal tar production of aromatic chemicals according to any one of claims 1 to 4, characterized in that, a third fractionating assembly (6) connected with the extraction assembly (1), the third fractionating assembly (6) being used for separating hydrorefined oil into the diesel oil, naphtha, and hydrocracking tail oil. The device for producing aromatic hydrocarbon chemicals from coal tar comprises:
6. The apparatus for production of aromatic chemicals from coal tar as claimed in claim 5 wherein, a hydrocracking assembly (7) connected with the third fractionating assembly (6), the hydrocracking assembly (7) being used for cracking the hydrocracking tail oil and then entering the third fractionating assembly (6) together with the hydrorefined oil. The device for producing aromatic hydrocarbon chemicals from coal tar comprises:
7. The apparatus for production of aromatic chemicals from coal tar as claimed in claim 5 wherein, a hydrorefining assembly (8) connected with the third fractionating assembly (6), the hydrorefining assembly (8) being used for processing mixed distillate oil into the hydrorefined oil. The device for producing aromatic hydrocarbon chemicals from coal tar comprises:
8. The apparatus for production of aromatic chemicals from coal tar as claimed in claim 7 wherein, a fourth fractionating assembly (9) connected with the hydrorefining assembly (8), the fourth fractionating assembly (9) being used for separating coking oil gas into the mixed distillate oil, phenol oil, and bottoming oil. The device for producing aromatic hydrocarbon chemicals from coal tar comprises:
9. The apparatus for production of aromatic chemicals from coal tar as claimed in claim 8 wherein, a delayed coking assembly (10) connected with the fourth fractionating assembly (9), the delayed coking assembly (10) being used for cracking coal tar into the coking oil gas and pitch coke, and the bottoming oil entering the delayed coking assembly (10) together with the coal tar. The coal tar is medium-temperature coal tar or low-temperature coal tar.
10. The apparatus for production of aromatic chemicals from coal tar as claimed in claim 9 wherein,