CN220012548U - Coal tar electric desalting pretreatment system - Google Patents
Coal tar electric desalting pretreatment system Download PDFInfo
- Publication number
- CN220012548U CN220012548U CN202321604326.6U CN202321604326U CN220012548U CN 220012548 U CN220012548 U CN 220012548U CN 202321604326 U CN202321604326 U CN 202321604326U CN 220012548 U CN220012548 U CN 220012548U
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- Prior art keywords
- pipeline
- demulsifier
- coal tar
- electric desalting
- medium
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- 238000011033 desalting Methods 0.000 title claims abstract description 70
- 239000011280 coal tar Substances 0.000 title claims abstract description 45
- 230000007704 transition Effects 0.000 claims description 16
- 238000007599 discharging Methods 0.000 claims description 7
- 238000000889 atomisation Methods 0.000 claims description 2
- 238000009296 electrodeionization Methods 0.000 claims 8
- 239000003995 emulsifying agent Substances 0.000 claims 4
- 238000005260 corrosion Methods 0.000 abstract description 6
- 230000007797 corrosion Effects 0.000 abstract description 6
- 230000004048 modification Effects 0.000 abstract description 4
- 238000012986 modification Methods 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 230000002776 aggregation Effects 0.000 abstract description 2
- 238000004220 aggregation Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005984 hydrogenation reaction Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Landscapes
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The utility model relates to a coal tar electric desalting pretreatment system, which comprises a multistage electric desalting treatment shunt communicated with a coal tar feeding pipeline, wherein at least 2 groups of multistage electric desalting treatment shunt are arranged in parallel; each group of multistage electric desalting treatment branches comprises at least two stages of electric desalting treatment tanks which are communicated in series; the feed inlet of the electric desalting treatment tank is respectively communicated with the demulsifier pipeline and the medium pipeline; the discharge port of the demulsifier pipeline extends to the inside of the medium pipeline, and the discharge direction is the same as the medium flow direction in the medium pipeline, so that corrosion of the pipeline caused by the aggregation of the demulsifier can be effectively improved, and the mixing of coal tar and the demulsifier can be promoted after the modification, thereby being beneficial to the operation of a subsequent electric desalting tank.
Description
Technical Field
The utility model belongs to a coal tar hydrogenation pretreatment technology, and particularly relates to a coal tar electric desalting pretreatment system.
Background
The coal tar desalting process generally requires that the basic content of salt in the coal tar in the deep processing process is not more than 3ml and the basic content of water is not more than 0.3%. In general, the electric desalting treatment is to separate the raw material coal tar in three phases by a horizontal screw centrifuge, remove water and impurities carried in the coal tar, treat the coal tar by an electric desalting tank, remove water and salts contained in the coal tar, filter the coal tar by an automatic back flush filter, remove coke powder and mechanical impurities with particle size larger than 15 mu m carried in the coal tar, and reduce the water content of the purified coal tar to below 0.3% by flash dehydration by a dehydration tower so as to meet the technical requirements of hydrogenation reaction.
However, in the process of electric desalting, strong acid is mainly used as a demulsifier for demulsification treatment, a demulsifier injection pipe is vertically connected with a coal tar pipeline at 90 degrees, a liquid storage area is arranged on the coal tar pipeline, the demulsifier is brought out along with the flow of coal tar and is mixed with the coal tar, and in the actual production process, a pipeline in the liquid storage area is extremely easy to be corroded by the demulsifier, perforation corrosion occurs, the demulsifier leaks, the device is in short-stop treatment and other conditions, and the stable operation of the production is seriously influenced.
Disclosure of Invention
In order to overcome the problems in the prior art, the utility model provides the coal tar electric desalting pretreatment system which can effectively improve corrosion of pipelines caused by gathering of demulsifiers, and can promote mixing of coal tar and demulsifiers after modification, thereby being beneficial to operation of a follow-up electric desalting tank.
The technical scheme adopted by the utility model is as follows:
the coal tar electric desalting pretreatment system comprises a multistage electric desalting treatment shunt which is communicated with a coal tar feeding pipeline, wherein at least 2 groups of multistage electric desalting treatment shunt are arranged in parallel; each group of multistage electric desalting treatment branches comprises at least two stages of electric desalting treatment tanks which are communicated in series; the feed inlet of the electric desalting treatment tank is communicated with a medium pipeline; the demulsifier pipeline extends to the inside of the medium pipeline, and the discharging direction is the same as the medium flow direction in the medium pipeline.
Further defined, the pipe diameter ratio of the demulsifier pipeline to the medium pipeline is 1:4 to 8.
Further limited, the demulsifier pipeline is L-shaped, the long arm of the demulsifier pipeline vertically extends into the medium pipeline along the central axis of the medium pipeline, the short arm of the demulsifier pipeline extends along the central axis of the medium pipeline, and the discharging direction of the short arm of the demulsifier pipeline is in the same direction with the medium flow direction in the medium pipeline.
Further defined, the short arm discharge port of the demulsifier pipeline is provided with an atomization nozzle.
Further limiting, a demulsifier transition pipe is arranged at the side part of the medium pipeline, and the demulsifier transition pipe is vertically communicated with the medium pipeline; the demulsifier pipeline penetrates through the inner cavity of the demulsifier transition pipe and extends into the medium pipeline.
Further defined, the demulsifier pipeline is connected with the demulsifier transition pipe through a flange.
Further defined, the multi-stage electric desalting treatment shunt comprises a first-stage electric desalting treatment tank and a second-stage electric desalting treatment tank, wherein a feed inlet of the first-stage electric desalting treatment tank is communicated with a medium pipeline, a discharge outlet of the first-stage electric desalting treatment tank is communicated with a feed inlet of the second-stage electric desalting treatment tank, and a feed inlet of the second-stage electric desalting treatment tank is also communicated with the medium pipeline through a pipeline.
Compared with the prior art, the utility model has the beneficial effects that:
1) According to the utility model, through pipeline transformation, the electric desalting treatment pipeline is divided into a plurality of groups of parallel and multistage series connection, the demulsifier pipeline is directly extended into the medium pipeline, the discharging direction is the same as the medium flow direction in the medium pipeline, the corrosion of the pipeline caused by the aggregation of the demulsifier can be effectively improved, the mixing of coal tar and the demulsifier can be promoted after transformation, and the operation of a subsequent electric desalting tank is facilitated.
2) The demulsifier pipeline is L-shaped modified, the short arm of the demulsifier pipeline extends along the central axis of the medium pipeline, and the emulsion pipeline is provided with the atomizing nozzle, so that the sprayed demulsifier can be fully mixed in the pipeline directly along with coal tar feeding, the service efficiency of the demulsifier is ensured, and the contact time of the demulsifier and the pipeline is greatly reduced.
3) According to the pipeline modification scheme, the demulsifier transition pipe is additionally arranged, and is used for isolating the demulsifier pipeline from air, so that corrosion is reduced, and the service life of the demulsifier pipeline is effectively prolonged.
Drawings
Fig. 1 is a schematic diagram of the coal tar electric desalting pretreatment system of example 1.
Fig. 2 is a schematic diagram of a connection structure between the demulsifier pipeline and the medium pipeline in fig. 1.
In the figure, a 1-coal tar feeding pipeline, a 2-electric desalting treatment tank, a 21-first-stage electric desalting treatment tank, a 22-second-stage electric desalting treatment tank, a 3-demulsifier pipeline, a 4-medium pipeline and a 5-demulsifier transition pipe.
Detailed Description
The technical scheme of the utility model is further described with reference to the accompanying drawings and the embodiments.
Example 1
Referring to fig. 1, the electric desalting pretreatment system for coal tar of the present embodiment includes a coal tar feeding pipe 1, an electric desalting treatment tank 2, a demulsifier pipe 3, a medium pipe 4 and a demulsifier transition pipe 5, which specifically is:
the embodiment relates to 4 electric desalting treatment tanks 2, wherein the 4 electric desalting treatment tanks 2 are divided into two groups, the two electric desalting treatment tanks 2 are communicated in series, a two-stage electric desalting treatment shunt is formed, namely, the electric desalting treatment shunt is divided into two ways, two-stage electric desalting treatment shunts are formed, each two-stage electric desalting treatment shunt comprises a first-stage electric desalting treatment tank 21 and a second-stage electric desalting treatment tank 22, a feed inlet of the first-stage electric desalting treatment tank 21 is communicated with a medium pipeline 4, a discharge outlet of the first-stage electric desalting treatment tank 21 is communicated with a feed inlet of the second-stage electric desalting treatment tank 22, the feed inlet of the second-stage electric desalting treatment tank 22 is also communicated with the medium pipeline 4 through a pipeline, a discharge outlet of the demulsifier pipeline 3 extends into the medium pipeline 4, and the discharge direction is in the same direction as the medium flow direction in the medium pipeline 4.
Further, referring to fig. 2, a demulsifier transition pipe 5 is vertically arranged at the side part of the medium pipeline 4, the demulsifier pipeline 3 is connected with the demulsifier transition pipe 5 through a connecting flange, and the demulsifier pipeline 3 extends into the medium pipeline 4 through the inner cavity of the demulsifier transition pipe 5.
Further, the demulsifier pipeline 3 of this embodiment is L-shaped, and the long arm of the demulsifier pipeline 3 passes through the inner cavity of the demulsifier transition pipe 5 and extends vertically into the medium pipeline 4 along the central axis of the medium pipeline 4, and the short arm of the demulsifier pipeline 3 extends along the central axis of the medium pipeline 4, and the discharging direction of the short arm of the demulsifier pipeline 3 and the medium flow direction in the medium pipeline 4 are in the same direction.
In order to ensure that the raw material coal tar and the demulsifier can be fully and quickly mixed in the conveying process, an atomizing nozzle is arranged on a short-arm discharge port of the demulsifier pipeline 3, and the atomizing nozzle, the demulsifier pipeline 3 and the demulsifier transition pipe 5 are made of corrosion-resistant stainless steel.
In order to further improve the effective rate of the demulsifier, on the basis of improved pipeline structure, the pipe diameter ratio of the demulsifier pipeline 3 to the medium pipeline 4 is required to be controlled to be 1:4 to 8, preferably 1: and 6, ensuring that the demulsifier is fully mixed with the raw material coal tar, and ensuring that the demulsification effect is optimal.
In the coal tar electric desalting pretreatment system of the embodiment, coal tar enters the system through the coal tar feeding pipeline 1 and then enters 2 groups of secondary electric desalting branches respectively, raw coal tar is input through the medium pipeline 4, and enters the primary electric desalting treatment tank 21 and the secondary electric desalting treatment tank 22 respectively through the medium pipeline 4, and before entering the electric desalting treatment tank 2, the medium pipeline 4 is also communicated with the demulsifier pipeline 3, and the raw coal tar is fully mixed with the demulsifier and then is input into the electric desalting treatment tank 2 for electric desalting treatment.
Example 2
The difference between this embodiment and embodiment 1 is that in this embodiment, the demulsifier pipeline 3 is L-shaped, the long arm of the demulsifier pipeline 3 is directly vertically communicated with the medium pipeline 4 and extends into the medium pipeline 4, the short arm of the demulsifier pipeline 3 extends along the central axis of the medium pipeline 4, and the discharging direction of the short arm of the demulsifier pipeline 3 is in the same direction as the medium flow direction in the medium pipeline 4, so that the demulsifier transition pipe 5 is eliminated.
Other components and their connection are the same as in embodiment 1.
Example 3
The present embodiment is different from embodiment 1 in that in the present embodiment, the electric desalting treatment branches are 3 groups, and each group includes three stages of electric desalting treatment tanks 2 connected in series, thereby increasing the throughput and greatly improving the production efficiency.
Other components and their connection are the same as in embodiment 1.
The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model are included in the protection scope of the present utility model.
Claims (7)
1. The utility model provides a coal tar electric desalting pretreatment system, includes the multistage electric desalting treatment branching way that communicates with coal tar feeding pipeline, its characterized in that: at least 2 groups of the multistage electric desalting treatment branches are arranged in parallel; each group of multistage electric desalting treatment branches comprises at least two stages of electric desalting treatment tanks which are communicated in series; the feed inlet of the electric desalting treatment tank is communicated with a medium pipeline; the demulsifier pipeline extends to the inside of the medium pipeline, and the discharging direction is the same as the medium flow direction in the medium pipeline.
2. The coal tar electro-desalting pretreatment system of claim 1, wherein the ratio of the pipe diameters of the demulsifier pipeline and the medium pipeline is 1:4 to 8.
3. The coal tar electro-desalting pretreatment system of claim 2, wherein the de-emulsifier tube is L-shaped, a long arm of the de-emulsifier tube extends vertically into the medium tube along a central axis of the medium tube, a short arm of the de-emulsifier tube extends along the central axis of the medium tube, and a discharging direction of the short arm of the de-emulsifier tube is in the same direction as a medium flow direction in the medium tube.
4. The coal tar electro-desalting pretreatment system according to claim 3, wherein a short-arm discharge port of the demulsifier pipeline is provided with an atomization nozzle.
5. The coal tar electro-desalting pretreatment system according to claim 2, wherein a demulsifier transition pipe is arranged at the side part of the medium pipeline and is vertically communicated with the medium pipeline; the demulsifier pipeline penetrates through the inner cavity of the demulsifier transition pipe and extends into the medium pipeline.
6. The coal tar electro-desalting pretreatment system according to claim 5, wherein the demulsifier pipeline is connected with the demulsifier transition pipe through a flange.
7. The coal tar electrodeionization pretreatment system of claim 5, wherein the multistage electrodeionization shunt comprises a primary electrodeionization tank and a secondary electrodeionization tank, wherein a feed port of the primary electrodeionization tank is in communication with a media conduit, a discharge port of the primary electrodeionization tank is in communication with a feed port of the secondary electrodeionization tank, and wherein the feed port of the secondary electrodeionization tank is also in communication with the media conduit via a conduit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321604326.6U CN220012548U (en) | 2023-06-21 | 2023-06-21 | Coal tar electric desalting pretreatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321604326.6U CN220012548U (en) | 2023-06-21 | 2023-06-21 | Coal tar electric desalting pretreatment system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220012548U true CN220012548U (en) | 2023-11-14 |
Family
ID=88688351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321604326.6U Active CN220012548U (en) | 2023-06-21 | 2023-06-21 | Coal tar electric desalting pretreatment system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220012548U (en) |
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2023
- 2023-06-21 CN CN202321604326.6U patent/CN220012548U/en active Active
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