CN215593000U - Needle coke hydrogenation system for preventing furfural coking - Google Patents
Needle coke hydrogenation system for preventing furfural coking Download PDFInfo
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- CN215593000U CN215593000U CN202122473963.1U CN202122473963U CN215593000U CN 215593000 U CN215593000 U CN 215593000U CN 202122473963 U CN202122473963 U CN 202122473963U CN 215593000 U CN215593000 U CN 215593000U
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- hydrogenation
- furfural
- needle coke
- heating furnace
- coking
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Abstract
The utility model discloses a furfural-coking-preventing needle coke hydrogenation system, which comprises a pre-hydrogenation heating furnace, a pre-hydrogenation reactor, a hydrogenation heating furnace, a hydrogenation reactor and a needle coke extraction tower, wherein the pre-hydrogenation heating furnace is arranged in the pre-hydrogenation reactor; the extraction oil in the needle coke extraction tower is pressurized by a booster pump and then is converged with high-purity hydrogen conveyed by a high-purity hydrogen pipeline, the extraction oil and the high-purity hydrogen are converged and then enter a pre-hydrogenation heating furnace, the extraction oil and the high-purity hydrogen enter a pre-hydrogenation reactor for primary hydrogenation reaction after being heated by the pre-hydrogenation heating furnace, and the extraction oil after the primary hydrogenation reaction sequentially enters the hydrogenation heating furnace and the hydrogenation reactor for secondary hydrogenation reaction. The needle coke hydrogenation system for preventing furfural coking provided by the utility model effectively avoids the influence on the service life of a hydrogenation reactor catalyst due to furfural coking, and shortens the production and operation period of the device.
Description
Technical Field
The utility model relates to the technical field of needle coke hydrogenation, in particular to a furfural coking prevention needle coke hydrogenation system.
Background
The raw material of the needle coke hydrogenation device is extract oil of an upstream extraction device, and the extract oil contains a certain amount of furfural. The furfural is easy to oxidize and coke at the temperature of more than 220 ℃, the temperature of the hydrogenation reactor is more than 300 ℃, so that the oil-containing furfural is easy to coke in the reactor, a large amount of carbon deposits are attached to the surface of the catalyst of the hydrogenation reactor, so that an active center is embedded, the activity of the catalyst is lost, the service life of the catalyst is influenced, and the production and operation period of the device is shortened.
In order to solve the problems, the utility model needs to invent a needle coke hydrogenation system for preventing furfural from coking so as to solve the problem that furfural is easy to coke in a hydrogenation reactor.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a furfural-coking-preventing needle coke hydrogenation system, which can protect the service life of a catalyst to the maximum extent and can ensure that a device can run for a long period.
In order to achieve the purpose, the technical scheme adopted by the utility model is as follows:
a furfural coking prevention needle coke hydrogenation system comprises a pre-hydrogenation heating furnace, a pre-hydrogenation reactor, a hydrogenation heating furnace, a hydrogenation reactor and a needle coke extraction tower;
the extraction oil in the needle coke extraction tower is pressurized by a booster pump and then is converged with high-purity hydrogen conveyed by a high-purity hydrogen pipeline, the extraction oil and the high-purity hydrogen are converged and then enter a pre-hydrogenation heating furnace, the extraction oil and the high-purity hydrogen enter a pre-hydrogenation reactor for primary hydrogenation reaction after being heated by the pre-hydrogenation heating furnace, and the extraction oil after the primary hydrogenation reaction sequentially enters the hydrogenation heating furnace and the hydrogenation reactor for secondary hydrogenation reaction.
Further, the pre-hydrogenation reactor and the hydrogenation reactor add hydrogen to the interior of the pre-hydrogenation reactor and the hydrogenation reactor through hydrogenation pipelines.
Furthermore, the pressure of the extract oil after being pressurized by the booster pump is between 3.0 and 11.0 MPa.
Further, the temperature of the extract oil and the high-purity hydrogen after being heated by a pre-hydrogenation heating furnace is between 200 and 220 ℃.
Furthermore, not less than 90% of furfural in the extract oil from the primary hydrogenation reaction is converted into furfuryl alcohol.
Furthermore, not less than 98% of furfural in the oil extracted by the primary hydrogenation reaction is converted into furfuryl alcohol.
Compared with the prior art, the utility model has the following beneficial effects:
according to the needle coke hydrogenation system for preventing furfural from coking, raw oil (extracted oil with furfural extracted by an extraction tower) is mixed with certain high-purity hydrogen by a booster pump and then preheated by a preheating furnace, the preheated raw oil enters a reactor, olefin and aromatic hydrocarbon hydrogenation saturation is carried out under the action of a catalyst, partial ring opening is carried out, and non-hydrocarbon compounds such as sulfur, nitrogen, oxygen and the like contained in the oil are converted into corresponding hydrocarbons and hydrogen sulfide, ammonia and water which are easy to remove; and then the separation is carried out through the subsequent process flow.
The needle coke hydrogenation system for preventing furfural coking provided by the utility model effectively avoids the influence on the service life of a hydrogenation reactor catalyst due to furfural coking, and shortens the production and operation period of the device.
Obviously, many modifications, substitutions, and variations are possible in light of the above teachings of the utility model, without departing from the basic technical spirit of the utility model, as defined by the following claims.
The foregoing aspects of the present invention are explained in further detail by the following detailed description; this should not be understood as limiting the scope of the above-described subject matter of the present invention to the following examples only; all the technologies realized based on the concept of the present invention belong to the scope of the present invention.
Drawings
FIG. 1 is a schematic structural diagram of a furfural coking prevention needle coke hydrogenation system of the present invention;
in the figure:
1-prehydrogenation heating furnace; 2-a pre-hydrogenation reactor; 3-a hydrogenation heating furnace; 4-a hydrogenation reactor; 5-needle coke extraction tower; 6-a booster pump; 7-high purity hydrogen line.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings.
As shown in fig. 1, the needle coke hydrogenation system for preventing furfural from coking comprises a pre-hydrogenation heating furnace 1, a pre-hydrogenation reactor 2, a hydrogenation heating furnace 3, a hydrogenation reactor 4 and a needle coke extraction tower 5;
the extraction oil in the needle coke extraction tower 5 is pressurized by a booster pump 6 and then joins with the high-purity hydrogen conveyed by a high-purity hydrogen pipeline 7, the extraction oil and the high-purity hydrogen join and then enter a pre-hydrogenation heating furnace 1, the extraction oil and the high-purity hydrogen enter a pre-hydrogenation reactor 2 for primary hydrogenation reaction after being heated by the pre-hydrogenation heating furnace 1, and the extraction oil after the primary hydrogenation reaction sequentially enters a hydrogenation heating furnace 3 and a hydrogenation reactor 4 for secondary hydrogenation reaction.
Further, the pre-hydrogenation reactor 2 and the hydrogenation reactor 4 are internally hydrogenated through hydrogenation pipelines.
Furthermore, the pressure of the extract oil after being pressurized by the booster pump 6 is between 3.0 and 11.0 MPa.
Further, the temperature of the extract oil and the high-purity hydrogen after being heated by the pre-hydrogenation heating furnace 1 is between 200 and 220 ℃.
Furthermore, not less than 90% of furfural in the extract oil from the primary hydrogenation reaction is converted into furfuryl alcohol.
Furthermore, not less than 98% of furfural in the oil extracted by the primary hydrogenation reaction is converted into furfuryl alcohol.
The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it is therefore intended that all such changes and modifications as fall within the true spirit and scope of the utility model be considered as within the following claims.
Claims (6)
1. A needle coke hydrogenation system for preventing furfural from coking is characterized in that: comprises a pre-hydrogenation heating furnace (1), a pre-hydrogenation reactor (2), a hydrogenation heating furnace (3), a hydrogenation reactor (4) and a needle coke extraction tower (5);
extract oil in the needle coke extraction tower (5) is pressurized by a booster pump (6) and then is converged with high-purity hydrogen conveyed by a high-purity hydrogen pipeline (7), the extract oil and the high-purity hydrogen are converged and then enter a pre-hydrogenation heating furnace (1), the extract oil and the high-purity hydrogen enter a pre-hydrogenation reactor (2) for primary hydrogenation reaction after being heated by the pre-hydrogenation heating furnace (1), and the extract oil after the primary hydrogenation reaction sequentially enters a hydrogenation heating furnace (3) and a hydrogenation reactor (4) for secondary hydrogenation reaction.
2. The furfural coking prevention needle coke hydrogenation system as claimed in claim 1, wherein: the pre-hydrogenation reactor (2) and the hydrogenation reactor (4) are internally hydrogenated through hydrogenation pipelines.
3. The furfural coking prevention needle coke hydrogenation system as claimed in claim 2, wherein: the pressure of the extract oil after being pressurized by the booster pump (6) is between 3.0 and 11.0 MPa.
4. The furfural coking prevention needle coke hydrogenation system as claimed in claim 3, wherein: the temperature of the extract oil and the high-purity hydrogen after being heated by the pre-hydrogenation heating furnace (1) is between 200 and 220 ℃.
5. The furfural coking prevention needle coke hydrogenation system as claimed in claim 1, wherein: not less than 90% of furfural in the extract oil is converted into furfuryl alcohol by the primary hydrogenation reaction.
6. The furfural coking prevention needle coke hydrogenation system as claimed in claim 5, wherein: not less than 98% of furfural in the oil extracted by the primary hydrogenation reaction is converted into furfuryl alcohol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122473963.1U CN215593000U (en) | 2021-10-14 | 2021-10-14 | Needle coke hydrogenation system for preventing furfural coking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122473963.1U CN215593000U (en) | 2021-10-14 | 2021-10-14 | Needle coke hydrogenation system for preventing furfural coking |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215593000U true CN215593000U (en) | 2022-01-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122473963.1U Active CN215593000U (en) | 2021-10-14 | 2021-10-14 | Needle coke hydrogenation system for preventing furfural coking |
Country Status (1)
| Country | Link |
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| CN (1) | CN215593000U (en) |
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2021
- 2021-10-14 CN CN202122473963.1U patent/CN215593000U/en active Active
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