CN209989331U - Hydrogenation carbon nine desulfurizing device - Google Patents
Hydrogenation carbon nine desulfurizing device Download PDFInfo
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- CN209989331U CN209989331U CN201920789716.2U CN201920789716U CN209989331U CN 209989331 U CN209989331 U CN 209989331U CN 201920789716 U CN201920789716 U CN 201920789716U CN 209989331 U CN209989331 U CN 209989331U
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Abstract
Nine desulphurization unit of hydrogenation carbon belongs to desulphurization unit technical field, especially relates to a nine desulphurization unit of hydrogenation carbon. The utility model provides a hydrogenation carbon nine desulphurization unit. The utility model discloses a desulfurizing tower, its structural feature desulfurizing tower top gas phase line port and heat exchanger a gaseous phase access connection, heat exchanger a condensate line port and reflux drum access connection, the reflux drum export passes through the backwash pump and links to each other with desulfurizing tower top reflux mouth, the desulfurizing tower side on desulfurizing tower upper portion is adopted the export and is connected with heat exchanger b access, heat exchanger b condensate line port and is adopted a jar access connection, it is continuous with the import of adopting the pump to adopt a jar export.
Description
Technical Field
The utility model belongs to the technical field of desulphurization unit, especially, relate to a nine desulphurization unit of hydrogenation carbon.
Background
The byproduct C9 aromatic hydrocarbon fraction (cracked C9 for short) of ethylene plant is the residual fraction after C5 fraction and C6-C8 fraction are extracted and separated from cracked naphtha, and accounts for about 10-20% of total ethylene yield. With the rapid development of petrochemical industry in China, particularly the annual improvement of the production capacity of ethylene, the quantity of cracking C9 is continuously increased, and more attention is paid to how to utilize the part of resources to develop downstream products. At present, a hydrogenated carbon nine product obtained by hydrogenating the cracked carbon nine can be used as fuel oil for blending, but the hydrogenated carbon nine product has higher sulfur content, so that the environment is influenced by directly using the hydrogenated carbon nine product for blending, the sale route of the hydrogenated carbon nine is narrowed, the price is reduced, and the economical efficiency of processing the carbon nine is influenced.
Disclosure of Invention
The utility model provides a hydrogen carbon nine desulphurization unit aiming at the above problems.
In order to realize the purpose, the utility model adopts the following technical scheme that the desulfurization tower comprises a desulfurization tower and is structurally characterized in that a gas phase line port at the top of the desulfurization tower is connected with a gas phase inlet of a heat exchanger a, a condensate line port of the heat exchanger a is connected with an inlet of a reflux tank, an outlet of the reflux tank is connected with a reflux port at the top of the desulfurization tower through a reflux pump, a side extraction port of the desulfurization tower at the upper part of the desulfurization tower is connected with an inlet of a heat exchanger b, a condensate line port of the heat exchanger b is connected with an inlet of an extraction tank, and an outlet of the extraction tank is connected with an;
one tower kettle port of the desulfurizing tower is connected with an inlet of a tower kettle circulating pump, an outlet of the tower kettle circulating pump is connected with an inlet of a reboiler, and an outlet of the reboiler is connected with a circulating return port of the desulfurizing tower;
the other tower kettle port of the desulfurizing tower is connected with the inlet of a kettle extracting pump, and the outlet of the kettle extracting pump goes to a recovery tower unit and is connected with the feed port of the recovery tower;
and a gas phase outlet of the heat exchanger a is connected with a feed inlet of an alkaline washing tower of the alkaline washing unit.
As an optimal scheme, the export is adopted to the desulfurizing tower side is two, and two side are adopted the export and are linked to each other with transmission line through the valve respectively, transmission line and heat exchanger b access connection.
As another preferred scheme, the reboiler adopts fixed tube sheet heat exchanger.
As another preferred scheme, the desulfurizing tower of the utility model adopts a sieve plate desulfurizing tower.
As another preferred scheme, the utility model discloses the rectifying section that the desulfurizing tower side outlet is located the desulfurizing tower.
Secondly, the feed inlet of desulfurizing tower corresponds with 49 layers of column plates of desulfurizing tower.
Additionally, two desulfurizing tower side are adopted the mouth and are arranged from top to bottom, and the desulfurizing tower side of top is adopted the export and is corresponded with 19 layers of column plates of desulfurizing tower, and the desulfurizing tower side of below is adopted the export and is corresponded with 40 layers of column plates of desulfurizing tower.
The utility model has the advantages of.
The hydrogenated carbon nine enters a desulfurizing tower, is separated by utilizing different boiling points of various components, and light components with high sulfur content are separated from the tower top and enter a heat exchanger a; and (4) introducing the noncondensable gas with high sulfur content in the heat exchanger a into a caustic washing unit for treatment. The desulfurized hydrogenated carbon nine is extracted from a side extraction outlet of the desulfurizing tower, and the use value of the desulfurized hydrogenated carbon nine is obviously improved.
Drawings
The present invention will be further described with reference to the accompanying drawings and the following detailed description. The scope of protection of the present invention is not limited to the following description.
FIG. 1 is a schematic structural view of a hydrogenation carbon nine desulfurization device of the present invention.
In fig. 1, 1 is a heat exchanger a, 2 is a reflux tank, 3 is a reflux pump, 4 is a kettle extraction pump, 5 is a tower kettle circulating pump, 6 is a reboiler, 7 is a desulfurizing tower, 8 is a heat exchanger b, 9 is an extraction tank, and 10 is an extraction pump.
Fig. 2 is a schematic structural diagram of the device for increasing yield of hydrogenated carbon nine according to the present invention.
In fig. 2, 1 is a heat exchanger, 2 is a reflux tank, 3 is a reflux pump, 4 is a kettle extraction pump, 5 is a column kettle circulating pump, 6 is a reboiler, 7 is a recovery column, 8 is a vacuum pump inlet buffer tank, 9 is a vacuum pump, and 10 is a vacuum pump outlet buffer tank.
Detailed Description
As shown in the figure, the utility model comprises a desulfurizing tower, wherein a gas phase line port at the top of the desulfurizing tower is connected with a gas phase inlet of a heat exchanger a, a condensate line port of the heat exchanger a is connected with an inlet of a reflux tank, an outlet of the reflux tank is connected with a reflux port at the top of the desulfurizing tower through a reflux pump, a lateral extraction outlet of the desulfurizing tower is connected with an inlet of a heat exchanger b, a condensate line port of the heat exchanger b is connected with an inlet of an extraction tank, and an outlet of the extraction tank is connected with an inlet of the extraction pump;
one tower kettle port of the desulfurizing tower is connected with an inlet of a tower kettle circulating pump, an outlet of the tower kettle circulating pump is connected with an inlet of a reboiler, and an outlet of the reboiler is connected with a circulating return port of the desulfurizing tower;
the other tower kettle port of the desulfurizing tower is connected with the inlet of a kettle extracting pump, and the outlet of the kettle extracting pump goes to a recovery tower unit and is connected with the feed port of the recovery tower;
and a gas phase outlet of the heat exchanger a is connected with a feed inlet of an alkaline washing tower of the alkaline washing unit.
The feed inlet of the desulfurizing tower can be connected with the discharge port of the two-section high-pressure flash tank sequentially through an adjusting valve and a flowmeter, and the hydrogenated carbon nine is input into the desulfurizing tower.
And two side extraction outlets of the desulfurizing tower are respectively connected with a transmission pipeline through valves, and the transmission pipeline is connected with an inlet of the heat exchanger b. The side extraction outlet of the desulfurizing tower is of a double-extraction-outlet structure, and the extraction outlet can be independently extracted through valve control, so that the sulfur content of the product can be conveniently controlled.
The utility model discloses the nine hydrogenation carbons after the desulfurization are not adopted at the desulfurizing tower top, but pass through the desulfurizing tower side after the condensation of desulfurizing tower upper portion and adopt the export, and it is low to adopt liquid sulfur content. The side mining material is extracted in a liquid phase, a floating head heat exchanger can be used as a condensing heat exchanger, and circulating water is used as a cooling medium, so that the temperature of the side mining material is reduced to about 40 ℃.
The reboiler adopts a fixed tube-plate heat exchanger. The heat exchange medium used may be high pressure steam.
The desulfurizing tower adopts a sieve plate desulfurizing tower.
And the side extraction outlet of the desulfurizing tower is positioned at the rectifying section of the desulfurizing tower.
The feed inlet of the desulfurizing tower corresponds to 49 layers of tower plates of the desulfurizing tower (the feed inlet of the 49 layers of tower plates is the feed inlet of the 49 layers of tower plates).
The two side mining outlets of the desulfurizing tower are arranged up and down, the side mining outlet of the upper desulfurizing tower corresponds to 19 layers of tower plates of the desulfurizing tower, the side mining outlet of the lower desulfurizing tower corresponds to 40 layers of tower plates of the desulfurizing tower (19 and 40 layers of side mining, namely mining at 19 layers of tower plates and 40 layers of tower plates; two-section mining can be adopted to respectively observe sulfur content, and when the system fluctuates, the flow of the two side mining outlets is changed in time, so that the sulfur content of products in a mining tank reaches the standard).
The 60 trays in FIG. 1 are intended to indicate a total number of trays of 60.
The operation of the present invention will be described with reference to the accompanying drawings.
The reboiler is the device thermodynamic energy, and heat exchanger a condenses the top gas phase of desulfurizing tower, and the lime set gets into the reflux drum, returns in the desulfurizing tower through the backwash pump, and the heating power is balanced. And the hydrogenated carbon nine enters the desulfurizing tower from a feed inlet of the desulfurizing tower. The non-condensable gas of the heat exchanger a is a gas phase with high hydrogen sulfide content, and the gas phase enters an alkaline washing unit for tail gas treatment.
The materials which are extracted from the side of the desulfurizing tower (19 layers of tower plates and 40 layers of tower plates are extracted together) enter an extracting tank after being condensed by a heat exchanger b, and are sent to a product tank through an extracting pump.
Feeding the tower kettle material of the desulfurizing tower into a reboiler for heating through a tower kettle circulating pump, and returning the heated material to the desulfurizing tower; and the other strand of material at the tower kettle of the desulfurizing tower is conveyed to the heavy component through a kettle extraction pump. The heavy component is the carbon nine heavy component, and the heavy component is directly fed into a feed inlet of a recovery tower of the device for improving the yield of the hydrogenated carbon nine.
The device for improving the yield of the hydrogenated carbon nine comprises a recovery tower, wherein a gas phase interface at the top of the recovery tower is connected with a gas phase inlet of a heat exchanger, a non-condensable gas outlet of the heat exchanger is connected with an inlet of a buffer tank at the inlet of a vacuum pump, the outlet end of the top of the buffer tank at the inlet of the vacuum pump is connected with an inlet of the vacuum pump, and an outlet of the vacuum pump is connected with an inlet of the buffer tank;
the port of the condensate line of the heat exchanger is connected with the inlet of a reflux tank, the outlet of the reflux tank is connected with the inlet of a reflux pump, and the outlet of the reflux pump returns to the reflux port at the top of the recovery tower;
the port of a tower kettle of the recovery tower is connected with the inlet of a circulating pump of the tower kettle, the outlet of the circulating pump of the tower kettle is connected with the inlet of a reboiler, and the outlet of the reboiler is connected with a circulating return port of the recovery tower;
the other tower kettle port of the recovery tower is connected with the inlet of a kettle extraction pump, and the outlet of the kettle extraction pump is connected with the inlet of a heavy component tank.
The utility model provides high device recovery tower of nine yields of hydrogenation carbon carries out the separation of light and heavy component through the rectification, and the carbon nine heavy component with former product tower cauldron is separated once more through the recovery tower and is obtained nine the hydrogenation carbon for nine products of hydrogenation carbon are extracted from the top of the tower, improve the yield, enlarge economic benefits. And (4) extracting carbon nine heavy components from the tower kettle.
The outlet of the buffer tank at the outlet of the vacuum pump can be connected with a tail gas pipeline and directly combusted after passing through the tail gas liquid separating tank and the tail gas water seal tank.
The feed port of the recovery tower is connected with the outlet of the kettle extraction pump of the hydrogenation carbon nine desulfurization device.
And the outlet of the reflux pump returns to the reflux port at the top of the recovery tower through a valve.
And the outlet of the reflux pump is connected with a first port of a tee joint, a second port of the tee joint returns to a reflux port at the top of the recovery tower through a valve, and a third port of the tee joint is connected with the inlet of the product tank through a valve.
The reboiler adopts a fixed tube-plate heat exchanger. The heat exchange medium used may be high pressure steam.
The three feeding ports of the recovery tower are arranged in the middle of the recovery tower from top to bottom; and a valve is arranged at each feeding port. The feed inlet adopts three feed inlet structures, and the valve at each feed inlet port is controlled to independently feed, and the feed inlet position of the recovery tower is adjusted (only one feed inlet feeds and the other two feed inlets close) according to the feed composition, the material temperature and the environment temperature of the recovery tower so as to ensure that qualified hydrogenated carbon nine products are obtained, increase the yield and enlarge the economic benefit.
The upper feeding ports of the three recovery towers correspond to the tower plates on the 20 layers of the recovery towers, the middle feeding ports correspond to the tower plates on the 24 layers of the recovery towers, and the lower feeding ports correspond to the tower plates on the 30 layers of the recovery towers (the feeding ports feed on the tower plates on the 20 layers, the 24 layers and the 30 layers respectively).
The 51 trays in FIG. 2 indicate the total number of trays of 51.
The kettle extraction pump can adopt a centrifugal pump.
The reflux line is used for ensuring that a kettle extraction pump (the kettle extraction pump is a centrifugal pump) runs for a long time, the regulating valve is used for controlling the external extraction of the tower kettle, and nine carbon components are extracted intermittently.
The vacuum pump can change the operating pressure of the system, and extract the hydrogenation product at a lower temperature by utilizing the principle that the boiling point of the material composition is reduced and the material composition is easy to vaporize at a low pressure, thereby achieving the effect of saving energy.
The recovery column may employ a separation column.
The working process of the device for improving the yield of the hydrogenated carbon nine according to the present invention is described with reference to the accompanying drawings.
When the device is used, the reboiler is a device thermodynamic energy source, the gas phase at the top of the recovery tower is condensed by the heat exchanger and then enters the reflux tank, and the materials in the reflux tank partially return to the top of the tower through the reflux pump to reflux so as to establish thermodynamic balance. The material in the reflux tank is directly collected to the product tank through the other part of the reflux pump; feeding the tower bottom material of the recovery tower into a reboiler for heating through a tower bottom circulating pump, and returning the heated material to the recovery tower; and (4) conveying the carbon nine heavy components to a heavy component tank by a kettle extraction pump from the kettle material of the other tower of the recovery tower.
The utility model discloses nine heavy ends feed inlets of carbon can adopt the pump to export with nine desulphurization unit's of hydrogenation carbon cauldron and link to each other.
It should be understood that the above detailed description of the present invention is only for illustrating the present invention and is not limited by the technical solutions described in the embodiments of the present invention, and those skilled in the art should understand that the present invention can still be modified or equivalently replaced to achieve the same technical effects; as long as the use requirement is satisfied, the utility model is within the protection scope.
Claims (7)
1. The hydrogenation carbon nine desulfurization device comprises a desulfurization tower and is characterized in that a gas phase line port at the top of the desulfurization tower is connected with a gas phase inlet of a heat exchanger a, a condensate line port of the heat exchanger a is connected with an inlet of a reflux tank, an outlet of the reflux tank is connected with a reflux port at the top of the desulfurization tower through a reflux pump, a side extraction outlet of the desulfurization tower at the upper part of the desulfurization tower is connected with an inlet of a heat exchanger b, a condensate line port of the heat exchanger b is connected with an inlet of an extraction tank, and an outlet of the extraction tank is connected with an inlet of the extraction pump;
one tower kettle port of the desulfurizing tower is connected with an inlet of a tower kettle circulating pump, an outlet of the tower kettle circulating pump is connected with an inlet of a reboiler, and an outlet of the reboiler is connected with a circulating return port of the desulfurizing tower;
the other tower kettle port of the desulfurizing tower is connected with the inlet of a kettle extracting pump, and the outlet of the kettle extracting pump goes to a recovery tower unit and is connected with the feed port of the recovery tower;
and a gas phase outlet of the heat exchanger a is connected with a feed inlet of an alkaline washing tower of the alkaline washing unit.
2. The device for desulfurizing hydrogenation carbon nine as claimed in claim 1, wherein the number of the side extraction ports of the desulfurizing tower is two, and the two side extraction ports are respectively connected with a transmission pipeline through valves, and the transmission pipeline is connected with an inlet of the heat exchanger b.
3. The device for removing sulfur from hydrocarbon nine as claimed in claim 1, wherein said reboiler is a fixed tube-plate heat exchanger.
4. The device for removing sulfur from hydrocarbonnine as claimed in claim 1, wherein said desulfurization tower is a sieve plate desulfurization tower.
5. The device for removing sulfur by hydrogenation of carbon nine as claimed in claim 1, wherein the side outlet of the desulfurization tower is located in the rectifying section of the desulfurization tower.
6. The device for removing sulfur from hydrocarbonnine as claimed in claim 1, wherein said feed inlet of the desulfurization tower corresponds to 49 layers of the tower plates of the desulfurization tower.
7. The device for removing sulfur by hydrogenation of carbon nine as claimed in claim 2, wherein the two side outlets of said desulfurizing tower are arranged up and down, the side outlet of the upper desulfurizing tower corresponds to 19 layers of tower plates of said desulfurizing tower, and the side outlet of the lower desulfurizing tower corresponds to 40 layers of tower plates of said desulfurizing tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920789716.2U CN209989331U (en) | 2019-05-29 | 2019-05-29 | Hydrogenation carbon nine desulfurizing device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920789716.2U CN209989331U (en) | 2019-05-29 | 2019-05-29 | Hydrogenation carbon nine desulfurizing device |
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| CN209989331U true CN209989331U (en) | 2020-01-24 |
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| CN201920789716.2U Active CN209989331U (en) | 2019-05-29 | 2019-05-29 | Hydrogenation carbon nine desulfurizing device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113355131A (en) * | 2020-03-05 | 2021-09-07 | 中国石化工程建设有限公司 | Multi-working-condition operation device and method for decarbonization nine towers of pyrolysis gasoline hydrogenation device |
| CN115948180A (en) * | 2023-03-14 | 2023-04-11 | 新疆天利石化股份有限公司 | Energy-saving and environment-friendly process for producing mixed aromatic hydrocarbon by cracking carbon nine through hydrogenation |
-
2019
- 2019-05-29 CN CN201920789716.2U patent/CN209989331U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113355131A (en) * | 2020-03-05 | 2021-09-07 | 中国石化工程建设有限公司 | Multi-working-condition operation device and method for decarbonization nine towers of pyrolysis gasoline hydrogenation device |
| CN115948180A (en) * | 2023-03-14 | 2023-04-11 | 新疆天利石化股份有限公司 | Energy-saving and environment-friendly process for producing mixed aromatic hydrocarbon by cracking carbon nine through hydrogenation |
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