CN213965900U - High-pressure amine absorption system - Google Patents
High-pressure amine absorption system Download PDFInfo
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- CN213965900U CN213965900U CN202021893171.9U CN202021893171U CN213965900U CN 213965900 U CN213965900 U CN 213965900U CN 202021893171 U CN202021893171 U CN 202021893171U CN 213965900 U CN213965900 U CN 213965900U
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Abstract
The application discloses high-pressure amine absorption system relates to suspension bed hydrogenation technical field. The high pressure amine absorption system comprises: an absorption tower; a buffer tank disposed below the absorption tower; the feed pipe is arranged on one side of the buffer tank and is used for inputting cold high-molecular gas to the absorption tower; one end of the first pipeline is connected with the upper part of the buffer tank, the other end of the first pipeline is connected with the bottom of the absorption tower, and the first pipeline is used for conveying cold high-pressure-content gas in the buffer tank to the absorption tower; and the liquid inlet pipe is arranged on one side of the upper part of the absorption tower and is used for conveying the lean amine liquid to the absorption tower. This application flows downwards from the top of absorption tower through control lean amine liquid, contacts with the gas of the needs desulfurization that rises (cold high-pressure gas promptly) each other, and hydrogen sulfide among the lean amine liquid absorbed gas becomes rich amine liquid, realizes the purification treatment to the cold high-pressure gas that fixed bed reactor produced, satisfies the environmental protection standard that improves day by day, more can adapt to the market demand.
Description
Technical Field
The application relates to the technical field of suspension bed hydrogenation, in particular to a high-pressure amine absorption system.
Background
The suspension bed hydrocracking technology is a thermal hydrocracking process, and can convert petroleum residue and coarse coal into marketable liquid fraction. The suspension bed reactor adopts slurry feeding, namely oil-solid mixed feeding. The oil phase is heavy oil to be processed, such as vacuum residuum, coal tar, catalytic slurry oil, asphalt and the like, and the solid phase is added catalyst, additive or coal powder.
In addition, another fixed bed reactor system can be matched at the downstream of the suspension bed reactor system, and gasoline and diesel oil products with high economy can be obtained through re-hydrofining and hydrocracking of the suspension bed reactor products, so that the total product yield is increased, and the operation flexibility of the whole device is greatly improved.
The high-pressure amine absorption tower system is a downstream device of a fixed bed cooling high-speed system in a suspension bed hydrocracking device, and is used for purifying hydrogen used for circulation and removing hydrogen sulfide in the hydrogen to meet the increasingly-improved environmental protection standard. The purification effect of the fixed bed cold high-molecular gas in the prior art is not ideal, the subsequent compression and circulation of hydrogen are affected, and the environmental protection standard of emission cannot be met.
SUMMERY OF THE UTILITY MODEL
The application aims at providing a high-pressure amine absorption system, and solving the problem that the evolution effect of cold high-pressure gas of a fixed product reactor in the prior art is not ideal.
In order to achieve the above purpose, the embodiments of the present application adopt the following technical solutions: a high pressure amine absorption system comprising: an absorption tower; a buffer tank disposed below the absorption tower; the feed pipe is arranged on one side of the buffer tank and is used for inputting cold high-molecular gas to the absorption tower; one end of the first pipeline is connected with the upper part of the buffer tank, the other end of the first pipeline is connected with the bottom of the absorption tower, and the first pipeline is used for conveying cold high-pressure-content gas in the buffer tank to the absorption tower; and the liquid inlet pipe is arranged on one side of the upper part of the absorption tower and is used for conveying the lean amine liquid to the absorption tower.
In the technical scheme, the lean amine liquid is controlled to flow downwards from the top of the absorption tower and contact with the rising gas (namely the cold high-pressure-component gas) needing desulfurization, and the hydrogen sulfide in the lean amine liquid absorption gas is changed into the rich amine liquid, so that the purification treatment of the cold high-pressure-component gas generated by the fixed bed reactor is realized, the increasingly improved environmental protection standard is met, and the market demand can be met.
Further, according to the embodiment of the present application, wherein the absorption tower and the buffer tank are integrated into a single body.
Further, according to the embodiment of the application, the bottom of the buffer tank is provided with a waste oil pipe.
Further, according to the embodiment of the application, the liquid inlet pipe is connected with the lean amine liquid pump.
Further, according to the embodiment of the application, a second pipeline is arranged at the bottom end of the absorption tower.
Further, according to this application embodiment, wherein, be provided with control valve one on the pipeline two, the bottom of absorption tower is provided with the level gauge, and level gauge and control valve intercommunication.
Further, according to the embodiment of the application, the top end of the absorption tower is provided with the exhaust pipe.
Further, according to this application embodiment, wherein, be provided with flowmeter and control valve two on the feed liquor pipe, flowmeter and control valve two intercommunication.
Further, according to the embodiment of the application, a return pipe is arranged on the liquid inlet pipe, a pressure gauge and a third control valve are arranged on the return pipe, and the pressure gauge is communicated with the third control valve.
Further, according to the embodiment of the application, a demister is arranged at the top of the absorption tower.
Compared with the prior art, the method has the following beneficial effects: this application flows downwards from the top of absorption tower through control lean amine liquid, contacts with the gas of the needs desulfurization that rises (cold high-pressure gas promptly) each other, and hydrogen sulfide among the lean amine liquid absorbed gas becomes rich amine liquid, realizes the purification treatment to the cold high-pressure gas that fixed bed reactor produced, satisfies the environmental protection standard that improves day by day, more can adapt to the market demand.
Drawings
The present application is further described below with reference to the drawings and examples.
FIG. 1 is a schematic diagram of the structure of a high pressure amine absorption system of the present application.
In the attached drawings
1. Absorption tower 2, buffer tank 3, lean amine liquid pump
4. Feed pipe 5, liquid inlet pipe 6 and return pipe
7. Pipeline I8 and pipeline II
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clear and fully described, embodiments of the present invention are further described in detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of some embodiments of the invention and are not limiting of the invention, and that all other embodiments obtained by those of ordinary skill in the art without the exercise of inventive faculty are within the scope of the invention.
In the description of the present invention, it should be noted that the terms "center", "middle", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "a," "an," "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
For the purposes of simplicity and explanation, the principles of the embodiments are described by referring mainly to examples. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the embodiments. It will be apparent, however, to one skilled in the art that the embodiments may be practiced without these specific details. In some instances, well-known methods and structures have not been described in detail so as not to unnecessarily obscure the embodiments. In addition, all embodiments may be used in combination with each other.
The present application discloses a specific structure of a high pressure amine absorption system by means of figure 1. As shown in FIG. 1, the high-pressure amine absorption system comprises an absorption tower 1 and a buffer tank 2, wherein the absorption tower 1 is arranged above the buffer tank 2. Specifically, the absorption tower 1 and the buffer tank 2 are both of a vertical tubular structure, the absorption tower 1 is provided with a first barrel, the buffer tank 2 is provided with a second barrel, the upper end of the first barrel is provided with a first end socket, the lower end of the second barrel is provided with a second end socket, the lower end of the first barrel is fixedly connected with the upper end of the second barrel, and a third end socket is arranged at the joint. Like this with absorption tower 1 and buffer tank 2 integrated as an organic whole, can enough save space, reduce the pipe connection to can reduce high-pressure vessel's head, save manufacturing cost.
Furthermore, a feed pipe 4 is provided to one side of the buffer tank 2, the feed pipe 4 being for receiving cold high-molecular gas from the fixed-bed reactor. After entering the buffer tank 2, the cold high-pressure gas enters the bottom of the absorption tower 1 through a first pipeline 7 arranged at the upper part of the buffer tank 2. If the cold high-pressure gas is mixed with waste oil, the waste oil can be discharged from a waste oil pipe at the bottom of the buffer tank 2.
In addition, a liquid inlet pipe 5 is arranged on one side of the upper part of the absorption tower 1, and the liquid inlet pipe 5 is connected with a lean amine liquid pump 3 and used for conveying the lean amine liquid into the absorption tower 1. The lean amine liquid flows downwards in the absorption tower 1 and contacts with the ascending cold high-temperature-ratio gas, and the lean amine liquid absorbs the hydrogen sulfide in the cold high-temperature-ratio gas to become rich amine liquid. And a second pipeline 8 is arranged at the bottom end of the absorption tower 1 (namely the bottom end of the third seal head) and is used for discharging the rich amine liquid after absorption and further purifying the rich amine liquid in the low-pressure amine absorption tower. The purified cold high-pressure gas is discharged from the exhaust pipe at the top of the absorption tower 1.
Wherein, the lower part of the absorption tower 1 is provided with a liquid level meter, the second pipeline 8 is provided with a first control valve, the liquid level meter is communicated with the first control valve, and the flow of the second pipeline 8 is controlled according to the liquid level at the bottom of the absorption tower 1.
Wherein, the absorption tower 1 is a plate tower or a packed tower, and the top is provided with a demister used for preventing liquid drops from being carried by gas-phase products.
Wherein, be provided with flowmeter and control valve two on feed liquor pipe 5, flowmeter and control valve two intercommunication for the flow in the control feed liquor pipe 5.
And secondly, a return pipe 6 is arranged on the liquid inlet pipe 5, and the return pipe 6 is arranged between the flow meter and the lean amine liquid pump 3 and is used for discharging the excessive lean amine liquid out of the liquid inlet pipe 5 under the flow control. The return pipe 6 is provided with a pressure gauge and a third control valve which are communicated and used for controlling the pressure in the return pipe 6.
In the above technical solution, the amine solution generally refers to a weakly alkaline organic amine solvent used for absorbing hydrogen sulfide or carbon dioxide in a desulfurization and decarburization chemical process, and the amine is more in the form of alcohol amine, and commonly includes Monoethanolamine (MEA), Diethanolamine (DEA), Diisopropanolamine (DIPA), N-Methyldiethanolamine (MDEA), and the like.
In the technical scheme, the lean amine liquid is controlled to flow downwards from the top of the absorption tower 1 and contact with rising gas (namely cold high-pressure-component gas) needing desulfurization, hydrogen sulfide in the lean amine liquid absorption gas is changed into the rich amine liquid, purification treatment of the cold high-pressure-component gas generated by the fixed bed reactor is realized, the increasingly improved environment-friendly standard is met, and the market demand can be met.
Although the illustrative embodiments of the present application have been described above to enable those skilled in the art to understand the present application, the present application is not limited to the scope of the embodiments, and various modifications within the spirit and scope of the present application defined and determined by the appended claims will be apparent to those skilled in the art from this disclosure.
Claims (10)
1. A high pressure amine absorption system, comprising:
an absorption tower;
the buffer tank is arranged below the absorption tower;
the feed pipe is arranged on one side of the buffer tank and is used for inputting cold high-molecular gas to the absorption tower;
one end of the first pipeline is connected with the upper part of the buffer tank, the other end of the first pipeline is connected with the bottom of the absorption tower, and the first pipeline is used for conveying cold high-pressure gas in the buffer tank to the absorption tower;
the liquid inlet pipe is arranged on one side of the upper part of the absorption tower and used for conveying the lean amine liquid to the absorption tower.
2. The high pressure amine absorption system of claim 1 wherein the absorber column and the surge tank are integrated.
3. The high pressure amine absorption system of claim 1 wherein the surge tank is provided with a waste oil line at the bottom.
4. The high pressure amine absorption system of claim 1 wherein the feed line is connected to a lean amine liquid pump.
5. The high pressure amine absorption system of claim 1 wherein the bottom end of the absorption column is provided with a second conduit.
6. The high-pressure amine absorption system according to claim 5, wherein a first control valve is arranged on the second pipeline, a liquid level meter is arranged at the bottom of the absorption tower, and the liquid level meter is communicated with the control valve.
7. The high pressure amine absorption system of claim 1 wherein the top of the absorber column is provided with a vent.
8. The high-pressure amine absorption system according to claim 1, wherein a flow meter and a second control valve are arranged on the liquid inlet pipe, and the flow meter is communicated with the second control valve.
9. The high-pressure amine absorption system as claimed in claim 8, wherein a return pipe is disposed on the liquid inlet pipe, and a third pressure gauge and a third control valve are disposed on the return pipe, and the third pressure gauge is communicated with the third control valve.
10. The high pressure amine absorption system of claim 1 wherein a demister is positioned at the top of the absorption column.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021893171.9U CN213965900U (en) | 2020-09-02 | 2020-09-02 | High-pressure amine absorption system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021893171.9U CN213965900U (en) | 2020-09-02 | 2020-09-02 | High-pressure amine absorption system |
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| Publication Number | Publication Date |
|---|---|
| CN213965900U true CN213965900U (en) | 2021-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202021893171.9U Active CN213965900U (en) | 2020-09-02 | 2020-09-02 | High-pressure amine absorption system |
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| CN (1) | CN213965900U (en) |
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- 2020-09-02 CN CN202021893171.9U patent/CN213965900U/en active Active
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