CN209989326U - Carbon nine light component recovery system - Google Patents
Carbon nine light component recovery system Download PDFInfo
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- CN209989326U CN209989326U CN201920789691.6U CN201920789691U CN209989326U CN 209989326 U CN209989326 U CN 209989326U CN 201920789691 U CN201920789691 U CN 201920789691U CN 209989326 U CN209989326 U CN 209989326U
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Abstract
A carbon nine light component recovery system belongs to the technical field of oil component recovery, and particularly relates to a carbon nine light component recovery system. The utility model provides a nine light component recovery system of carbon. The utility model comprises a separation tower, and is characterized in that the outlet at the top end of the separation tower is connected with the inlet of a low-temperature water heat exchanger a, the inlet at the top end of a reflux tank is connected with the condensate outlet of the heat exchanger a, and the gas phase outlet at the top end of the reflux tank is connected with the inlet of a heat exchanger b; a noncondensable gas port of the heat exchanger b is connected with the regulating valve; a condensate line port of the heat exchanger b is connected with a condensate line port at the lower part of the reflux tank, an outlet of the reflux tank is connected with an inlet of a reflux pump, an outlet of the reflux pump is connected with a first port of a three-way pipe, and a second port of the three-way pipe is connected with a reflux port at the upper part of the separation tower through a second valve; and a third interface of the three-way pipe is connected with the regulating valve.
Description
Technical Field
The utility model belongs to the technical field of oil component retrieves, especially, relate to a nine light component recovery system of carbon.
Background
The cracking carbon nine is one of the by-products of ethylene, and is the residual fraction after C5 fraction and C6-C8 fraction are separated from cracked naphtha by extraction, and accounts for about 10% -20% of total yield of ethylene. Along with the rapid development of petrochemical industry in China, particularly the production capacity of ethylene is improved year by year, the quantity of cracking C9 is continuously increased, more and more attention is paid to people on how to utilize the part of resources to develop downstream products, and at present, a carbon nine product obtained by hydrogenating cracking carbon nine can be used as fuel oil for blending. In daily operation, the pressure of the system needs to be controlled by tail gas emission, and the loss of the carbon nine light components can be caused in the emission process, so that a carbon nine light component recovery system is needed.
Disclosure of Invention
The utility model discloses just to above-mentioned problem, provide a carbon nine light component recovery system.
In order to realize the purpose, the utility model adopts the following technical scheme that the separation tower comprises a separation tower, and is structurally characterized in that an outlet at the top end of the separation tower is connected with an inlet of a low-temperature water heat exchanger a, an inlet at the top end of a reflux tank is connected with a condensate outlet of the heat exchanger a, and a gas phase outlet at the top end of the reflux tank is connected with an inlet of a heat exchanger b; a noncondensable gas port of the heat exchanger b is connected with the regulating valve;
a condensate line port of the heat exchanger b is connected with a condensate line port at the lower part of the reflux tank, an outlet of the reflux tank is connected with an inlet of a reflux pump, an outlet of the reflux pump is connected with a first port of a three-way pipe, and a second port of the three-way pipe is connected with a reflux port at the upper part of the separation tower through a second valve; a third interface of the three-way pipe is connected with the regulating valve;
the inlet of the kettle extraction pump is connected with the first tower kettle extraction port of the separation tower, and the outlet of the kettle extraction pump is connected with the inlet of the heavy component tank;
an outlet of the heat exchanger c is connected with a feed inlet of the separation tower;
the reboiler import links to each other with the export of tower cauldron circulating pump, and the import of tower cauldron circulating pump is connected with knockout tower second tower cauldron extraction mouth, and the reboiler export is connected with knockout tower circulation return mouth.
As a preferred scheme, the utility model discloses heat exchanger a is floating head heat exchanger.
As another preferred scheme, heat exchanger b and heat exchanger c are fixed tube sheet heat exchanger.
As another preferred scheme, the utility model discloses the knockout tower adopts the perforated plate tower.
As another preferred scheme, be provided with manometer PI on the backward flow jar.
Additionally, the reboiler is fixed tube sheet heat exchanger.
The utility model has the advantages of.
The utility model discloses the noncondensable gas is behind the low temperature water heat exchanger condensation in the backward flow jar, and the lime set under the condensation gets back to backward flow jar lower half, and the backward flow mouth that gets into the backward flow jar is below backward flow jar liquid level, and the condensate line of being convenient for produces certain liquid seal, and the noncondensable gas of low temperature water heat exchanger passes through tail gas governing valve (first valve) exhaust tail gas.
The utility model discloses a heat exchanger discharges again after condensing tail gas, further retrieves the condensation of nine light components of carbon, reduces the material loss.
The utility model discloses set up heat exchanger b for the backward flow jar gaseous phase reduces, and pressure control is more stable, and the emission also correspondingly reduces, reduces the loss, increases nine economic benefits of carbon.
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 diagram of the present invention.
In the figure, 1 heat exchanger a, 2 reflux tanks, 3 reflux pumps, 4 kettle extraction pumps, 5 tower kettle circulating pumps, 6 reboilers, 7 recovery towers, 8 heat exchangers b and 9 heat exchangers c.
Detailed Description
As shown in the figure, the utility model discloses a knockout tower, knockout tower top export and heat exchanger an access connection, return tank top import and heat exchanger a condensate outlet connection, return tank top gas phase export and heat exchanger b access connection, heat exchanger b's noncondensable gas port is connected to the tail gas pipeline through the governing valve on, through tail gas branch fluid reservoir and tail gas water seal jar after direct combustion.
A condensate line port of the heat exchanger b is connected with a condensate line port at the lower part of the reflux tank, an outlet of the reflux tank is connected with an inlet of the reflux pump, an outlet of the reflux pump is connected with a first port of the three-way pipe, a second port of the three-way pipe is connected with a reflux port at the upper part of the separation tower through a second valve, and a third port of the three-way pipe is connected with an inlet of the product tank through a regulating valve;
the inlet of the kettle extraction pump is connected with the first tower kettle extraction port of the separation tower, and the outlet of the kettle extraction pump is connected with the inlet of the heavy component tank;
the outlet of the heat exchanger c is connected with the feed inlet of the separation tower, and the inlet of the heat exchanger c is connected with the outlet of an external extraction pump of the carbon nine heavy removal tower at the carbon nine heavy removal working section;
the inlet of the reboiler is connected with the outlet of the tower kettle circulating pump, and the inlet of the tower kettle circulating pump is connected with the extraction port of the second tower kettle of the separation tower; the outlet of the reboiler is connected with the circulating return port of the separation tower.
The heat exchanger a is a floating head heat exchanger, and the adopted heat exchange medium is low-temperature water.
And a pressure gauge PI is arranged on the reflux tank.
And the heat exchanger b and the heat exchanger c are fixed tube plate type heat exchangers. The heat exchange medium of the heat exchanger b is low-temperature water, and the heat exchange medium of the heat exchanger c is low-pressure steam.
The separation tower adopts a sieve plate tower.
The reboiler is a fixed tube-plate heat exchanger, and the heat exchange medium is high-pressure steam.
The operation of the present invention will be described with reference to the accompanying drawings.
During the use, reboiler and heat exchanger c provide the heat source for the system, the gaseous phase of separation top of the tower gets into the reflux drum after heat exchanger a condenses, partly back to the top of the tower through the backwash pump and provide the cold source for the system, it is balanced to establish the heating power, another part directly gets rid of nine light component product jars of carbon, the reflux drum gaseous phase is condensed in getting into heat exchanger b, the lime set gets back to the reflux drum, noncondensable gas is discharged through tail gas emission governing valve, heavy component jar is adopted outside the pump through the cauldron to a knockout tower cauldron partly, another part gets back to the knockout tower after getting into the reboiler heat transfer through the cauldron circulating pump.
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 (6)
1. A carbon nine light component recovery system comprises a separation tower, and is characterized in that an outlet at the top end of the separation tower is connected with an inlet of a low-temperature water heat exchanger a, an inlet at the top end of a reflux tank is connected with a condensate outlet of the heat exchanger a, and a gas phase outlet at the top end of the reflux tank is connected with an inlet of a heat exchanger b; a noncondensable gas port of the heat exchanger b is connected with the regulating valve;
a condensate line port of the heat exchanger b is connected with a condensate line port at the lower part of the reflux tank, an outlet of the reflux tank is connected with an inlet of a reflux pump, an outlet of the reflux pump is connected with a first port of a three-way pipe, and a second port of the three-way pipe is connected with a reflux port at the upper part of the separation tower through a second valve; a third interface of the three-way pipe is connected with the regulating valve;
the inlet of the kettle extraction pump is connected with the first tower kettle extraction port of the separation tower, and the outlet of the kettle extraction pump is connected with the inlet of the heavy component tank;
an outlet of the heat exchanger c is connected with a feed inlet of the separation tower;
the reboiler import links to each other with the export of tower cauldron circulating pump, and the import of tower cauldron circulating pump is connected with knockout tower second tower cauldron extraction mouth, and the reboiler export is connected with knockout tower circulation return mouth.
2. The carbon nine light components recovery system of claim 1, wherein the heat exchanger a is a floating head heat exchanger.
3. The carbon nine light components recovery system of claim 1, wherein the heat exchanger b and the heat exchanger c are fixed tube plate heat exchangers.
4. The carbon nine light components recovery system of claim 1, wherein the separation column is a sieve plate column.
5. The carbon nine light components recovery system of claim 1, wherein the reflux drum is provided with a pressure gauge PI.
6. The carbon nine light components recovery system of claim 1, wherein the reboiler is a fixed tube and plate heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920789691.6U CN209989326U (en) | 2019-05-29 | 2019-05-29 | Carbon nine light component recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920789691.6U CN209989326U (en) | 2019-05-29 | 2019-05-29 | Carbon nine light component recovery system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209989326U true CN209989326U (en) | 2020-01-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920789691.6U Active CN209989326U (en) | 2019-05-29 | 2019-05-29 | Carbon nine light component recovery system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209989326U (en) |
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2019
- 2019-05-29 CN CN201920789691.6U patent/CN209989326U/en active Active
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