CN211170590U - Coal tar distillation device - Google Patents
Coal tar distillation device Download PDFInfo
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- CN211170590U CN211170590U CN201922221481.XU CN201922221481U CN211170590U CN 211170590 U CN211170590 U CN 211170590U CN 201922221481 U CN201922221481 U CN 201922221481U CN 211170590 U CN211170590 U CN 211170590U
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- Prior art keywords
- sodium carbonate
- oil extraction
- extraction pipeline
- pipeline
- coal tar
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- 239000011280 coal tar Substances 0.000 title claims abstract description 68
- 238000004821 distillation Methods 0.000 title claims abstract description 24
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 241
- 229910000029 sodium carbonate Inorganic materials 0.000 claims abstract description 122
- 238000000605 extraction Methods 0.000 claims abstract description 102
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims abstract description 78
- 230000018044 dehydration Effects 0.000 claims abstract description 24
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 24
- 239000002994 raw material Substances 0.000 claims abstract description 22
- 239000007788 liquid Substances 0.000 claims abstract description 18
- 239000002253 acid Substances 0.000 claims abstract description 14
- 238000005260 corrosion Methods 0.000 claims abstract description 13
- 230000007797 corrosion Effects 0.000 claims abstract description 13
- 238000004519 manufacturing process Methods 0.000 claims description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000005086 pumping Methods 0.000 claims description 6
- 239000003513 alkali Substances 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 2
- 239000010426 asphalt Substances 0.000 abstract description 11
- 229910001415 sodium ion Inorganic materials 0.000 abstract description 9
- 238000000034 method Methods 0.000 description 7
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 4
- MWPLVEDNUUSJAV-UHFFFAOYSA-N anthracene Chemical compound C1=CC=CC2=CC3=CC=CC=C3C=C21 MWPLVEDNUUSJAV-UHFFFAOYSA-N 0.000 description 4
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 150000003863 ammonium salts Chemical class 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The application discloses coal tar distillation plant includes: the system comprises a coal tar raw material tank, a coal tar feeding pump, a dehydration tower, a main tower, a phenol oil extraction pipeline, a three-mixed oil extraction pipeline, a sodium carbonate liquid storage tank, a sodium carbonate pump and a sodium carbonate pipeline; the coal tar feeding pump is connected with the coal tar raw material tank and the dehydration tower, and the bottom of the dehydration tower is connected with the main tower; the phenol oil extraction pipeline is arranged on the side surface of the top of the main tower, and the three-mixed oil extraction pipeline is arranged below the phenol oil extraction pipeline and at the middle-upper part of the main tower; the sodium carbonate pump is connected with the sodium carbonate liquid storage tank; the sodium carbonate pipeline is connected with the sodium carbonate pump, the phenol oil extraction pipeline and the three-mixed oil extraction pipeline, and a sodium carbonate solution in the sodium carbonate pipeline reacts with free acid in the phenol oil extraction pipeline and the three-mixed oil extraction pipeline to slow down corrosion of the phenol oil extraction pipeline and the three-mixed oil extraction pipeline. By adopting the device, sodium ions do not enter the asphalt, the quality of the asphalt is ensured, and the adding amount of sodium carbonate is not limited.
Description
Technical Field
The application relates to the technical field of chemical equipment, in particular to a coal tar distillation device.
Background
The coal tar distillation is to carry out primary separation on the coal tar, the primary separation is to distill and divide the coal tar into various fractions according to the boiling point range, and then the various fractions are further processed. Distillation of coal tar generally separates fractions such as light oil, phenol oil, wash oil, naphthalene oil, anthracene oil, and pitch, wherein the phenol oil fraction is distilled from the top of a main column, phenol, naphthalene, and wash three-mixed fractions (also called as three-mixed oil) are cut from a side line of the column, and the distillate is extracted from the bottom of a vacuum column to further separate anthracene oil and pitch.
The coal tar raw material needs to be dehydrated and then distilled, the coal tar still contains a large amount of ammonium salt after being dehydrated, the ammonium salt is heated and decomposed by a distillation system to generate free acid, and the free acid can corrode pipelines, valves and the like. In the prior art, in order to slow down corrosion, a sodium carbonate liquid storage tank and a sodium carbonate pump are additionally arranged at a coal tar raw material pump, and sodium carbonate and coal tar are sent into a coal tar distillation device together. However, if sodium carbonate is added too much, sodium ions in the sodium carbonate will eventually enter the asphalt, which in turn causes the ash content of the asphalt to rise, so that the asphalt product is unqualified, and if the sodium carbonate is added too little, there is no obvious effect on reducing corrosion.
SUMMERY OF THE UTILITY MODEL
The embodiment of the application discloses coal tar distillation plant to solve prior art, when utilizing the sodium carbonate to slow down coal tar distillation plant's corruption, if the sodium carbonate adds too much, during the sodium ion in the sodium carbonate can finally enter into pitch, and then leads to the ash content of pitch to rise, make pitch product unqualified, if the addition of sodium carbonate is too little, these problems of not having obvious effect to slowing down the corruption.
The embodiment of the application provides a coal tar distillation plant, includes: the system comprises a coal tar raw material tank, a coal tar feeding pump, a dehydration tower, a main tower, a phenol oil extraction pipeline, a three-mixed oil extraction pipeline, a sodium carbonate liquid storage tank, a sodium carbonate pump and a sodium carbonate pipeline, wherein the phenol oil extraction pipeline and the three-mixed oil extraction pipeline are arranged on the side surface of the main tower;
the coal tar feeding pump is connected with the coal tar raw material tank and the dehydration tower, and is used for pumping the coal tar in the coal tar raw material tank into the dehydration tower to remove water and light oil;
the bottom of the dehydration tower is connected with the main tower and is used for conveying the coal tar after water and light oil removal to the main tower for distillation;
the phenol oil extraction pipeline is arranged on the side surface of the top of the main tower and is used for extracting the phenol oil separated from the main tower;
the three-mixed oil extraction pipeline is arranged below the phenol oil extraction pipeline and at the middle-upper part of the main tower and is used for extracting the three-mixed oil separated from the main tower;
the sodium carbonate pump is connected with the sodium carbonate liquid storage tank and used for pumping out a sodium carbonate solution in the sodium carbonate liquid storage tank to the sodium carbonate pipeline;
the sodium carbonate pipeline is connected with the sodium carbonate pump, the phenol oil extraction pipeline and the three-mixed oil extraction pipeline, and a sodium carbonate solution in the sodium carbonate pipeline reacts with free acid in the phenol oil extraction pipeline and the three-mixed oil extraction pipeline, so that corrosion of the phenol oil extraction pipeline and the three-mixed oil extraction pipeline is reduced.
Optionally, the sodium carbonate pipeline is connected at the junction of a phenol oil production pipeline and the main tower.
Optionally, the sodium carbonate pipeline is connected at the junction of a tertiary oil recovery pipeline and the main tower.
Optionally, the sodium carbonate pipe is a pipe resistant to alkali corrosion.
Optionally, the end of the sodium carbonate pipeline is of a transverse F-shaped structure, and two parallel lines on the F-shaped structure are sequentially connected to the phenol oil production pipeline and the three-mixed oil production pipeline from inside to outside.
Optionally, a valve is arranged on the sodium carbonate pipeline.
The embodiment of the application discloses coal tar distillation plant includes: the system comprises a coal tar raw material tank, a coal tar feeding pump, a dehydration tower, a main tower, a phenol oil extraction pipeline, a three-mixed oil extraction pipeline, a sodium carbonate liquid storage tank, a sodium carbonate pump and a sodium carbonate pipeline, wherein the phenol oil extraction pipeline and the three-mixed oil extraction pipeline are arranged on the side surface of the main tower; the coal tar feeding pump is connected with the coal tar raw material tank and the dehydration tower, and the bottom of the dehydration tower is connected with the main tower; the phenol oil extraction pipeline is arranged on the side surface of the top of the main tower, and the three-mixed oil extraction pipeline is arranged below the phenol oil extraction pipeline and at the middle-upper part of the main tower; the sodium carbonate pump is connected with the sodium carbonate liquid storage tank; the sodium carbonate pipeline is connected with the sodium carbonate pump, the phenol oil extraction pipeline and the three-mixed oil extraction pipeline, and a sodium carbonate solution in the sodium carbonate pipeline reacts with free acid in the phenol oil extraction pipeline and the three-mixed oil extraction pipeline, so that corrosion of the phenol oil extraction pipeline and the three-mixed oil extraction pipeline is relieved.
By adopting the scheme, finally, sodium ions enter the phenol oil and the three-mixed oil and are extracted along with a phenol oil extraction pipeline and a three-mixed oil extraction pipeline system, the sodium ions do not enter the asphalt and cannot influence ash content in the asphalt, so that the quality of the asphalt is ensured, and the sodium carbonate solution is directly added into the phenol oil extraction pipeline and the three-mixed oil extraction pipeline, so that corrosion is slowed down, the addition amount of the sodium carbonate solution can be determined according to the raw material amount of coal tar, more free acid is added into the corresponding sodium carbonate solution with a larger amount, less free acid is added into the corresponding sodium carbonate solution with a smaller amount, and the addition amount of the sodium carbonate solution can be controlled at will.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a coal tar distillation apparatus provided in an embodiment of the present application.
Wherein: 1-coal tar raw material tank; 2-coal tar feed pump; 3-a dehydration column; 4-a main column; 5-a phenol oil extraction pipeline; 6-three mixed oil extraction pipeline; 7-sodium carbonate liquid storage tank; 8-sodium carbonate pump; 9-sodium carbonate pipeline.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, the present application is described in further detail with reference to the accompanying drawings and the detailed description.
The embodiment of the application discloses coal tar distillation plant to solve prior art, when utilizing the sodium carbonate to slow down coal tar distillation plant's corruption, if the sodium carbonate adds too much, during the sodium ion in the sodium carbonate can finally enter into pitch, and then leads to the ash content of pitch to rise, make pitch product unqualified, if the addition of sodium carbonate is too little, these problems of not having obvious effect to slowing down the corruption.
Referring to FIG. 1, there is shown a coal tar distillation apparatus comprising: the system comprises a coal tar raw material tank 1, a coal tar feeding pump 2, a dehydration tower 3, a main tower 4, a phenol oil extraction pipeline 5, a three-mixed oil extraction pipeline 6, a sodium carbonate liquid storage tank 7, a sodium carbonate pump 8 and a sodium carbonate pipeline 9, wherein the phenol oil extraction pipeline 5 and the three-mixed oil extraction pipeline are arranged on the side surface of the main tower 4;
the coal tar feeding pump 2 is connected with the coal tar raw material tank 1 and the dehydration tower 3, and the coal tar feeding pump 2 is used for pumping the coal tar in the coal tar raw material tank 1 into the dehydration tower 3 to remove water and light oil.
In the embodiment, the coal tar feed pump 2 is used for conveying the coal tar raw material in the coal tar raw material tank 1 to the dehydration tower 3 to remove water and light oil, the specific conveying method can be realized by adopting the existing method, and the application is not specifically limited.
And the bottom of the dehydration tower 3 is connected with the main tower 4 and is used for conveying the coal tar after water and light oil removal to the main tower 4 for distillation.
In the embodiment, the dehydration tower 3 conveys the coal tar after water and light oil removal to the main tower 4, the main tower 4 carries out distillation separation on the coal tar after water and light oil removal, and the specific conveying method and the distillation method can be realized by adopting the existing method, and the application is not particularly limited.
The phenol oil extraction pipeline 5 is arranged on the side face of the top of the main tower 4, and the phenol oil extraction pipeline 5 is used for extracting the phenol oil separated from the main tower 4.
The phenol oil extraction pipeline 5 is also provided with a valve, and the valve is used for controlling the flow of the extracted phenol oil. In this embodiment, the phenol oil extraction pipe 5 is disposed at the top side of the main tower 4 to ensure the quality of the extracted phenol oil. As for the specific method for producing phenol oil, the existing method can be used, and the present application is not particularly limited.
The three-mixed oil extraction pipeline 6 is arranged below the phenol oil extraction pipeline 5 and at the middle upper part of the main tower 4, and the three-mixed oil extraction pipeline 6 is used for extracting the three-mixed oil separated from the main tower 4.
And a valve is also arranged on the three-mixed oil production pipeline 6 and is used for controlling the flow of three-mixed oil production. In this embodiment, since the boiling point of the tertiary mixed oil is higher than that of the phenol oil, the extraction pipeline is disposed below the phenol oil extraction pipeline 5, and the tertiary mixed oil extraction pipeline 6 is disposed at an upper middle portion of the main tower 4, so that the quality of the extracted tertiary mixed oil can be ensured. As for the specific three-mixed oil production method, the existing method can be adopted, and the application is not particularly limited.
The sodium carbonate pump 8 is connected with the sodium carbonate liquid storage tank 7, and the sodium carbonate pump 8 is used for pumping out the sodium carbonate solution in the sodium carbonate liquid storage tank 7 to the sodium carbonate pipeline 9.
The sodium carbonate solution in the sodium carbonate liquid storage tank 7 is pumped out to the sodium carbonate pipeline 9 through a sodium carbonate pump 8, and is conveyed to the phenol oil production pipeline 5 and the three-mixed oil production pipeline 6 through the sodium carbonate pipeline 9 so as to neutralize free acid in the phenol oil production pipeline 5 and the three-mixed oil production pipeline 6.
The sodium carbonate pipeline 9 is connected with a sodium carbonate pump 8, the phenol oil extraction pipeline 5 and the three-mixed oil extraction pipeline 6, and a sodium carbonate solution in the sodium carbonate pipeline 9 reacts with free acid in the phenol oil extraction pipeline 5 and the three-mixed oil extraction pipeline 6, so that corrosion of the phenol oil extraction pipeline 5 and the three-mixed oil extraction pipeline 6 is reduced.
Optionally, the sodium carbonate line 9 is connected at the junction of the phenol oil production line 5 and the main column 4.
And the sodium carbonate pipeline 9 is connected at the joint of the three-mixed oil extraction pipeline 6 and the main tower 4.
In this embodiment, sodium carbonate pipeline 9 lug connection phenol oil extraction pipeline 5 and three miscella extraction pipeline 6 slow down the corruption of free acid to it in phenol oil extraction pipeline 5 and the three miscella extraction pipeline 6, and sodium ion does not get into pitch, can the ash content of effectual reduction pitch, and, the addition of sodium carbonate solution is not influenced.
Specifically, the sodium carbonate pipeline 9 is connected at the joint of the phenol oil production pipeline 5 and the main tower 4, and the joint of the three-mixed oil production pipeline 6 and the main tower 4 can ensure that the phenol oil production pipeline 5 and the three-mixed oil production pipeline 6 are prevented from being corroded.
In addition, in order to ensure the integrity of the coal tar distillation process, the present application may also include other necessary structures, such as a vacuum tower, and the present application is not particularly stated herein, and particularly, reference may be made to relevant descriptions in the prior art.
The embodiment of the application discloses coal tar distillation plant includes: the system comprises a coal tar raw material tank 1, a coal tar feeding pump 2, a dehydration tower 3, a main tower 4, a phenol oil extraction pipeline 5, a three-mixed oil extraction pipeline 6, a sodium carbonate liquid storage tank 7, a sodium carbonate pump 8 and a sodium carbonate pipeline 9, wherein the phenol oil extraction pipeline 5 and the three-mixed oil extraction pipeline are arranged on the side surface of the main tower 4; the coal tar feeding pump 2 is connected with a coal tar raw material tank 1 and a dehydration tower 3, and the bottom of the dehydration tower 3 is connected with a main tower 4; the phenol oil extraction pipeline 5 is arranged on the side surface of the top of the main tower 4, and the three-mixed oil extraction pipeline 6 is arranged below the phenol oil extraction pipeline 5 and at the middle-upper part of the main tower 4; the sodium carbonate pump 8 is connected with the sodium carbonate liquid storage tank 7; the sodium carbonate pipeline 9 is connected with the sodium carbonate pump 8, the phenol oil extraction pipeline 5 and the three-mixed oil extraction pipeline 6, and a sodium carbonate solution in the sodium carbonate pipeline 9 reacts with free acid in the phenol oil extraction pipeline 5 and the three-mixed oil extraction pipeline 6, so that corrosion of the phenol oil extraction pipeline 5 and the three-mixed oil extraction pipeline 6 is reduced.
By adopting the scheme, finally, sodium ions enter the phenol oil and the three-mixed oil and are extracted along with the phenol oil extraction pipeline 5 and the three-mixed oil extraction pipeline 6, the sodium ions do not enter the asphalt and cannot influence ash content in the asphalt, so that the quality of the asphalt is ensured, and the sodium carbonate solution is directly added into the phenol oil extraction pipeline 5 and the three-mixed oil extraction pipeline 6, so that corrosion is reduced, the addition amount of the sodium carbonate solution can be determined according to the raw material amount of the coal tar, a large amount of the sodium carbonate solution is correspondingly added when more free acid exists, the amount of the free acid exists is relatively small, the corresponding addition amount of less sodium carbonate exists, and the addition amount of the sodium carbonate solution can be controlled at will.
Optionally, the sodium carbonate pipe 9 is a pipe resistant to alkali corrosion.
For example, the sodium carbonate pipe 9 may be made of carbon steel, and pipes made of other materials may be used, which is not limited in this application.
Optionally, the end of the sodium carbonate pipeline 9 is of a transverse F-shaped structure, and two parallel lines on the F-shaped structure are sequentially connected to the phenol oil production pipeline 5 and the three-mixed oil production pipeline 6 from inside to outside.
Wherein, the tip of sodium carbonate pipeline 9 is horizontal F type structure, and F type structure clockwise rotation 90 degrees that is, two parallel lines on the F type structure from inside to outside connect gradually to phenol oil production pipeline 5 and three miscella extraction pipeline 6, and specifically, pipeline connection phenol oil production pipeline 5 that is slightly longer is connected to three miscella extraction pipeline 6, pipeline connection phenol oil that is slightly shorter.
In addition, when the end of the sodium carbonate pipeline 9 is in an F-shaped structure, the main pipeline of the sodium carbonate pipeline 9 is designed to be parallel to the main tower 4.
Optionally, a valve is arranged on the sodium carbonate pipeline 9. The valves can be multiple and are respectively arranged at the position leading to the phenol oil extraction pipeline 5 and the position leading to the tertiary mixed oil extraction pipeline 6, and the valves are used for controlling the flow of the sodium carbonate solution and further controlling the adding amount of the sodium carbonate solution.
The present application has been described in detail with reference to specific embodiments and illustrative examples, but the description is not intended to limit the application. Those skilled in the art will appreciate that various equivalent substitutions, modifications or improvements may be made to the presently disclosed embodiments and implementations thereof without departing from the spirit and scope of the present disclosure, and these fall within the scope of the present disclosure. The protection scope of this application is subject to the appended claims.
Claims (6)
1. A coal tar distillation apparatus, comprising: the system comprises a coal tar raw material tank (1), a coal tar feeding pump (2), a dehydration tower (3), a main tower (4), a phenol oil extraction pipeline (5) arranged on the side surface of the main tower (4), a three-mixed oil extraction pipeline (6), a sodium carbonate liquid storage tank (7), a sodium carbonate pump (8) and a sodium carbonate pipeline (9);
the coal tar feeding pump (2) is connected with the coal tar raw material tank (1) and the dehydration tower (3), and the coal tar feeding pump (2) is used for pumping the coal tar in the coal tar raw material tank (1) into the dehydration tower (3) to remove water and light oil;
the bottom of the dehydration tower (3) is connected with the main tower (4) and is used for conveying the coal tar after water and light oil removal to the main tower (4) for distillation;
the phenol oil extraction pipeline (5) is arranged on the side surface of the top of the main tower (4), and the phenol oil extraction pipeline (5) is used for extracting the phenol oil separated from the main tower (4);
the three-mixed oil extraction pipeline (6) is arranged below the phenol oil extraction pipeline (5) and at the middle-upper part of the main tower (4), and the three-mixed oil extraction pipeline (6) is used for extracting three-mixed oil separated from the main tower (4);
the sodium carbonate pump (8) is connected with the sodium carbonate liquid storage tank (7), and the sodium carbonate pump (8) is used for pumping out a sodium carbonate solution in the sodium carbonate liquid storage tank (7) to the sodium carbonate pipeline (9);
the sodium carbonate pipeline (9) is connected with a sodium carbonate pump (8), the phenol oil extraction pipeline (5) and the three-mixed oil extraction pipeline (6), a sodium carbonate solution in the sodium carbonate pipeline (9) reacts with free acid in the phenol oil extraction pipeline (5) and the three-mixed oil extraction pipeline (6), and therefore corrosion of the phenol oil extraction pipeline (5) and the three-mixed oil extraction pipeline (6) is reduced.
2. The apparatus according to claim 1, characterized in that the sodium carbonate line (9) is connected at the junction of a phenol oil production line (5) and the main column (4).
3. The apparatus according to claim 1, characterized in that the sodium carbonate pipe (9) is connected at the junction of the tertiary oil recovery pipe (6) and the main column (4).
4. The device according to claim 1, characterized in that the sodium carbonate pipe (9) is a pipe resistant to alkali corrosion.
5. The device according to claim 1, characterized in that the end of the sodium carbonate pipe (9) is of a transverse F-shaped structure, and two parallel lines on the F-shaped structure are connected to the phenol oil production pipe (5) and the tertiary oil production pipe (6) in sequence from inside to outside.
6. The device according to claim 1, characterized in that a valve is arranged on the sodium carbonate pipe (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922221481.XU CN211170590U (en) | 2019-12-12 | 2019-12-12 | Coal tar distillation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922221481.XU CN211170590U (en) | 2019-12-12 | 2019-12-12 | Coal tar distillation device |
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| Publication Number | Publication Date |
|---|---|
| CN211170590U true CN211170590U (en) | 2020-08-04 |
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ID=71804926
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922221481.XU Active CN211170590U (en) | 2019-12-12 | 2019-12-12 | Coal tar distillation device |
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| Country | Link |
|---|---|
| CN (1) | CN211170590U (en) |
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2019
- 2019-12-12 CN CN201922221481.XU patent/CN211170590U/en active Active
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Effective date of registration: 20240321 Address after: 750409 Zone B of Linhe Comprehensive Industrial Park, Ningdong Energy and Chemical Base, Yinchuan City, Ningxia Hui Autonomous Region Patentee after: Ningxia Baofeng Energy Group Coking Plant 2 Co.,Ltd. Country or region after: Zhong Guo Patentee after: NINGXIA BAOFENG ENERGY GROUP Co.,Ltd. Country or region after: China Patentee after: NINGXIA FENGDA FINE CHEMICAL Co.,Ltd. Patentee after: NINGXIA DONGYI ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. Address before: 750411 Baofeng circular economy industrial park, Ningdong energy and chemical industry base, Yinchuan City, Ningxia Hui Autonomous Region Patentee before: NINGXIA BAOFENG ENERGY GROUP Co.,Ltd. Country or region before: Zhong Guo Patentee before: NINGXIA BAOFENG ENERGY GROUP COAL COKING Co.,Ltd. Country or region before: China Patentee before: NINGXIA FENGDA FINE CHEMICAL Co.,Ltd. Patentee before: NINGXIA DONGYI ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. |